Product Description
30 hp 540 rpm Ratio 1:1.92 1-3/8″ 6 spline LF205 Counter clockwise agricultural machinery gearbox for lawn mower
This new gearbox fits Comer finishing mower model LF-205-J. The gearbox ratio is 1:1.92. The input shaft is 1-3/8″ 6 spline. The output shaft is a clockwise rotation 1-1/4″ round shaft with 1/4″ key way. The gearbox is rated at 30 hp at 540 rpm and has a CW (Counter clockwise) rotation.
|
Product |
LF-205 Mower Gearbox for Comer machine |
| Material | Housing/QT450 |
| Gear/20CrMoTi; Shaft/ High-strength alloy steel | |
| Ratio | 1:1.92~1:1.47 |
| Weight | 16 kg |
| Input Speed | 540 RPM |
| Horse Power | 30~40 Hp |
| Input Torque | 389~520 N·M |
| Output Torque | 203~354 N·M |
| Center Distance | 182.6 mm |
| System | ISO9001 |
| Packing | Plastic bag + PE foam + Wooden case + Metal strap |
| Delivery | 35-45 after order |
GEAR MATERIALS
20CrMnTi/20CrMnMo for your choice
CASTINGS MATERIALS
Gray cast iron HT250 according to standard GB/T 1348-2009 Ductile iron QT450-10 according to standard GB/T 1348-2009 Cast steel ZG310-570 according to standard GB/T 5613-2014
SHAFTS MATERIALS
40Cr,45#,20CrMnTi,20CrMnMo for your choice according to your request.
POWER To ensure the correct use of the product we recommand to pay attention to the specifications mentioned on our technical sheet.Consider also the input rotation speed,the power input and the transmission ratios.Where the rotation or other working conditions are different,please contact LongQuan technical department.
LUBRICATION
The reducer is usually supplied without lubricant.The recommended quantity of lubricant is indicated on our catalogue and the first replaced must be done after 50-60 hours of running,then replaced after 600-800 working hours. The emptying of the gearbox should be made immediately after the working,with the oil still hot,in order to avoid the deposition of sludge.Check frequently the oil level and top up the oil whenever necessary.
Related Products
Factory
Extensive use for agricultural machines
Guarantee: High precision, high wear resistance, low noise, smooth and steady, high strength
Our factory
| Type: | Agricultural Gearbox |
|---|---|
| Usage: | Farmland Infrastructure, Agricultural Machine |
| Material: | Carbon Steel |
| Power Source: | Electricity |
| Weight: | OEM |
| After-sales Service: | Installation Guide |
| Samples: |
US$ 999/Piece
1 Piece(Min.Order) | |
|---|
Power Take-Off (PTO) Shafts
Power take-off (PTO) shafts are used on many types of machines, including jet aircraft. They are typically semi-permanently mounted to a marine or industrial engine, and are powered by a drive shaft. The drive shaft also powers secondary implements and accessories. Depending on the application, accessory drives may also be used in aircraft. There are four main types of PTO units used in jet aircraft.
Power take-off (PTO) shaft
The power take-off (PTO) shaft of a tractor can be controlled to operate in one of two modes: automatic and manual. Automatic mode operates when the PTO shaft starts turning and is automatically engaged when the power lift is raised by actuating the lift lever 9. Manual mode operates when the lift lever is not raised.
The manual mode allows for manual adjustments. A retaining band 12 may be adjusted arcuately about PTO shaft S with an axial center parallel to the axis of the PTO shaft S. The retaining band may be secured by conventional over center clamps. The retaining band 12 may also be adjusted arcuately about pin or bolt 30.
Power take-off (PTO) shaft safety retainers are used to prevent unintended disconnection of the PTO shaft. The safety retainers comprise a stationary openable band that circumscribes the PTO shaft near the connection with driven machinery. The band is preferably offset from the axis of the PTO shaft.
While the PTO shaft is a convenient way to transfer mechanical power to farm implements, there are several inherent hazards associated with using it improperly. Accidental disconnections of the PTO shaft pose a significant risk for the operator. A disconnect can cause the PTO shaft to whip around the driven machinery, potentially causing injury.
Power take-off shaft entanglements can be devastating to the limbs trapped in them, requiring amputation in some cases. In addition to being dangerous, the PTO shafts must be fully guarded to prevent contact with the ground. A farmer must never get too close to an operating PTO shaft to protect their own safety.
Types
There are several different types of PTO shafts available to suit various applications. They can vary in size and number of splines. Each standard has a specific speed range and is designed to fit a variety of implements. For example, there are German and Italian types of PTO shafts.
The type of PTO shaft you choose will determine the maximum load that can be safely transferred. Depending on the type, the rate at which the PTO clutch engages will be different. For example, a lower-density PTO shaft will engage at a slower rate than a higher-density PTO shaft, while a higher-density shaft will be more tolerant of higher loads.
The primary function of a PTO shaft is to secure equipment to the tractor or other agricultural equipment. These parts often feature safety shields on both ends. They are also made in the same shape as the secondary shaft. The front shaft is wider than the secondary shaft, which allows the secondary shaft to fit inside. However, during movement, pieces of the PTO shaft can collapse, making them less safe.
PTO shafts are expensive and easy to steal, so make sure to protect your investment. Make sure the PTO shaft has guards to protect it from thieves. There are two types of PTO shafts: the external and the internal PTO yokes. Internal PTO shafts have an internal PTO yoke, while external PTO shafts use a universal joint. There is also a safety chain and shield on the external PTO shaft.
Depending on the application, you can choose between several different kinds of PTO shafts. Some types of PTO shafts have multiple splines, which can increase the torque transmitted. For applications requiring accuracy and precision, you may want to use a parallel keyed shaft.
Connections
A PTO shaft has two parts: an input and an output. The input portion of a PTO adapter shaft has a smaller diameter, and the output portion has a larger diameter. Both are connected by splines. These splines have tapered outer ends. The first bore 25 has a first frustoconical wall, while the second bore has a second frustoconical wall.
One of the most common causes of PTO shaft failure is a poorly adjusted clutch. Another common cause is improper lubrication of the PTO shaft’s wide angle joints. PTO shafts should be lubricated at least once every eight hours. If you fail to do this, you risk premature ware and reduced life expectancy.
When a PTO shaft is installed in a tractor, the tractor must be connected to the implement using a coupler frame. The coupler frame has a PTO adapter mounting flange that engages with the PTO stub shaft. The coupler frame can move to accommodate the PTO adapter shaft, and the PTO adapter shaft can pivot and slide with the coupler frame.
When a PTO shaft fails, it can result in damage to the tractor and implement. Identifying the cause will help you fix the problem. Constant compression of the PTO shaft can damage the connecting shafts and connections. This could damage the tractor or implement, resulting in expensive repairs. When this happens, it is important to cut or shorten the shaft to reduce the risk of damage.
PTO shaft 24 extends rearward from tractor 10 and is connected to the front universal joint 28 and first end of variable-length splined drive shaft 32. The shaft is connected to a drive mechanism 36 on a mobile work implement 34. This drive mechanism may be mechanical, hydraulic, or a combination of both.
Safety
It is very important for every person using a tractor to understand the safety of PTO shafts. PTOs can be extremely dangerous, and without the correct shielding, they can cause serious injury. It can also be very dangerous if someone accidentally steps on or falls on one while the machine is operating. This is why it is important for everyone using a tractor to read the manufacturer’s manual and follow the safety guidelines for PTO shafts. Moreover, PTOs must only be used for the purpose intended.
PTO safety should be the number one priority for every operator. A small child was tragically killed when he became entangled with a spinning PTO shaft. His father tried to pull him out of the shaft, but was unable to do so. His clothing, which was near the spinning shaft, caught on the PTO and dragged him into it. His body was thrown around the shaft several times, and he sustained injuries to his leg, right arm, and head.
The PTO shaft is an important part of a tractor, and is used to secure the equipment. It is usually secured by safety shields on both ends. There are several kinds of safety shields. One type is a shield that is attached to the front of the PTO shaft. Another type is a shield that rotates freely on its bearings.
Power takeoffs are common on most small and compact tractors, construction machinery, and other equipment. They rotate to provide the drive for the equipment. However, the PTO shaft is very dangerous because it can easily catch something that gets too close to it. Moreover, loose items can also get tangled around the PTO shaft.
Maintenance
One of the most important things to do in order to keep your PTO shaft in top condition is to keep it properly greased. This can be done by using a grease gun or a hand pump. It is important to keep the grease fresh and apply it in the appropriate amounts depending on how much you use the PTO. It is also important to separate the primary and secondary shafts and remove any debris from them.
It is also important to check the spline threads on your PTO on a periodic basis. This is important because some signs of dry shafts are not always immediately apparent. Similarly, spline threading and corrosion can occur behind the scenes and go undetected. Proper PTO maintenance is a vital part of safe and efficient operation.
A damaged or worn drive shaft will prevent your car from turning freely, leaving you exposed to higher repair bills. In addition, it will drastically affect the performance of your car. A broken drive shaft can even result in a crash. You should take your vehicle to a mechanic as soon as you notice any of these problems.
Fortunately, most PTO-driven equipment is equipped with a shear pin to prevent collisions and prevent damage to the gearbox and shaft. It should also be replaced regularly to prevent excessive wear. Long bolts pose a risk of entanglement and can easily catch clothing or gloves. For safety reasons, it is important to disengage the PTO when not in use.
Another thing to do is to keep the PTO shields clean. They must be regularly rotated and tested. Always ensure that your drawbar is properly configured for your machine. This prevents stressing or separating the driveline.
editor by CX 2023-06-07
China Professional Tractor Gearbox for Mower, Ratio 1: 1.92/1: 1.47, Agricultural Machines 540 Rpm with Hot selling
Product Description
Tractor Gearbox for Mower, Ratio 1: 1.92/1: 1.47, Agricultural Machines 540 Rpm
GEAR MATERIALS
20CrMnTi/20CrMnMo for your choice
CASTINGS MATERIALS
Gray cast iron HT250 according to standard GB/T 1348-2009 Ductile iron QT450-10 according to standard GB/T 1348-2009 Cast steel ZG310-570 according to standard GB/T 5613-2014
SHAFTS MATERIALS
40Cr,45#,20CrMnTi,20CrMnMo for your choice according to your request.
POWER To ensure the correct use of the product we recommand to pay attention to the specifications mentioned on our technical sheet.Consider also the input rotation speed,the power input and the transmission ratios.Where the rotation or other working conditions are different,please contact LongQuan technical department.
LUBRICATION
The reducer is usually supplied without lubricant.The recommended quantity of lubricant is indicated on our catalogue and the first replaced must be done after 50-60 hours of running,then replaced after 600-800 working hours. The emptying of the gearbox should be made immediately after the working,with the oil still hot,in order to avoid the deposition of sludge.Check frequently the oil level and top up the oil whenever necessary.
Related Products
Factory
Extensive use for agricultural machines
Guarantee: High precision, high wear resistance, low noise, smooth and steady, high strength
Our factory
Stiffness and Torsional Vibration of Spline-Couplings
In this paper, we describe some basic characteristics of spline-coupling and examine its torsional vibration behavior. We also explore the effect of spline misalignment on rotor-spline coupling. These results will assist in the design of improved spline-coupling systems for various applications. The results are presented in Table 1.
Stiffness of spline-coupling
The stiffness of a spline-coupling is a function of the meshing force between the splines in a rotor-spline coupling system and the static vibration displacement. The meshing force depends on the coupling parameters such as the transmitting torque and the spline thickness. It increases nonlinearly with the spline thickness.
A simplified spline-coupling model can be used to evaluate the load distribution of splines under vibration and transient loads. The axle spline sleeve is displaced a z-direction and a resistance moment T is applied to the outer face of the sleeve. This simple model can satisfy a wide range of engineering requirements but may suffer from complex loading conditions. Its asymmetric clearance may affect its engagement behavior and stress distribution patterns.
The results of the simulations show that the maximum vibration acceleration in both Figures 10 and 22 was 3.03 g/s. This results indicate that a misalignment in the circumferential direction increases the instantaneous impact. Asymmetry in the coupling geometry is also found in the meshing. The right-side spline’s teeth mesh tightly while those on the left side are misaligned.
Considering the spline-coupling geometry, a semi-analytical model is used to compute stiffness. This model is a simplified form of a classical spline-coupling model, with submatrices defining the shape and stiffness of the joint. As the design clearance is a known value, the stiffness of a spline-coupling system can be analyzed using the same formula.
The results of the simulations also show that the spline-coupling system can be modeled using MASTA, a high-level commercial CAE tool for transmission analysis. In this case, the spline segments were modeled as a series of spline segments with variable stiffness, which was calculated based on the initial gap between spline teeth. Then, the spline segments were modelled as a series of splines of increasing stiffness, accounting for different manufacturing variations. The resulting analysis of the spline-coupling geometry is compared to those of the finite-element approach.
Despite the high stiffness of a spline-coupling system, the contact status of the contact surfaces often changes. In addition, spline coupling affects the lateral vibration and deformation of the rotor. However, stiffness nonlinearity is not well studied in splined rotors because of the lack of a fully analytical model.
Characteristics of spline-coupling
The study of spline-coupling involves a number of design factors. These include weight, materials, and performance requirements. Weight is particularly important in the aeronautics field. Weight is often an issue for design engineers because materials have varying dimensional stability, weight, and durability. Additionally, space constraints and other configuration restrictions may require the use of spline-couplings in certain applications.
The main parameters to consider for any spline-coupling design are the maximum principal stress, the maldistribution factor, and the maximum tooth-bearing stress. The magnitude of each of these parameters must be smaller than or equal to the external spline diameter, in order to provide stability. The outer diameter of the spline must be at least four inches larger than the inner diameter of the spline.
Once the physical design is validated, the spline coupling knowledge base is created. This model is pre-programmed and stores the design parameter signals, including performance and manufacturing constraints. It then compares the parameter values to the design rule signals, and constructs a geometric representation of the spline coupling. A visual model is created from the input signals, and can be manipulated by changing different parameters and specifications.
The stiffness of a spline joint is another important parameter for determining the spline-coupling stiffness. The stiffness distribution of the spline joint affects the rotor’s lateral vibration and deformation. A finite element method is a useful technique for obtaining lateral stiffness of spline joints. This method involves many mesh refinements and requires a high computational cost.
The diameter of the spline-coupling must be large enough to transmit the torque. A spline with a larger diameter may have greater torque-transmitting capacity because it has a smaller circumference. However, the larger diameter of a spline is thinner than the shaft, and the latter may be more suitable if the torque is spread over a greater number of teeth.
Spline-couplings are classified according to their tooth profile along the axial and radial directions. The radial and axial tooth profiles affect the component’s behavior and wear damage. Splines with a crowned tooth profile are prone to angular misalignment. Typically, these spline-couplings are oversized to ensure durability and safety.
Stiffness of spline-coupling in torsional vibration analysis
This article presents a general framework for the study of torsional vibration caused by the stiffness of spline-couplings in aero-engines. It is based on a previous study on spline-couplings. It is characterized by the following three factors: bending stiffness, total flexibility, and tangential stiffness. The first criterion is the equivalent diameter of external and internal splines. Both the spline-coupling stiffness and the displacement of splines are evaluated by using the derivative of the total flexibility.
The stiffness of a spline joint can vary based on the distribution of load along the spline. Variables affecting the stiffness of spline joints include the torque level, tooth indexing errors, and misalignment. To explore the effects of these variables, an analytical formula is developed. The method is applicable for various kinds of spline joints, such as splines with multiple components.
Despite the difficulty of calculating spline-coupling stiffness, it is possible to model the contact between the teeth of the shaft and the hub using an analytical approach. This approach helps in determining key magnitudes of coupling operation such as contact peak pressures, reaction moments, and angular momentum. This approach allows for accurate results for spline-couplings and is suitable for both torsional vibration and structural vibration analysis.
The stiffness of spline-coupling is commonly assumed to be rigid in dynamic models. However, various dynamic phenomena associated with spline joints must be captured in high-fidelity drivetrain models. To accomplish this, a general analytical stiffness formulation is proposed based on a semi-analytical spline load distribution model. The resulting stiffness matrix contains radial and tilting stiffness values as well as torsional stiffness. The analysis is further simplified with the blockwise inversion method.
It is essential to consider the torsional vibration of a power transmission system before selecting the coupling. An accurate analysis of torsional vibration is crucial for coupling safety. This article also discusses case studies of spline shaft wear and torsionally-induced failures. The discussion will conclude with the development of a robust and efficient method to simulate these problems in real-life scenarios.
Effect of spline misalignment on rotor-spline coupling
In this study, the effect of spline misalignment in rotor-spline coupling is investigated. The stability boundary and mechanism of rotor instability are analyzed. We find that the meshing force of a misaligned spline coupling increases nonlinearly with spline thickness. The results demonstrate that the misalignment is responsible for the instability of the rotor-spline coupling system.
An intentional spline misalignment is introduced to achieve an interference fit and zero backlash condition. This leads to uneven load distribution among the spline teeth. A further spline misalignment of 50um can result in rotor-spline coupling failure. The maximum tensile root stress shifted to the left under this condition.
Positive spline misalignment increases the gear mesh misalignment. Conversely, negative spline misalignment has no effect. The right-handed spline misalignment is opposite to the helix hand. The high contact area is moved from the center to the left side. In both cases, gear mesh is misaligned due to deflection and tilting of the gear under load.
This variation of the tooth surface is measured as the change in clearance in the transverse plain. The radial and axial clearance values are the same, while the difference between the two is less. In addition to the frictional force, the axial clearance of the splines is the same, which increases the gear mesh misalignment. Hence, the same procedure can be used to determine the frictional force of a rotor-spline coupling.
Gear mesh misalignment influences spline-rotor coupling performance. This misalignment changes the distribution of the gear mesh and alters contact and bending stresses. Therefore, it is essential to understand the effects of misalignment in spline couplings. Using a simplified system of helical gear pair, Hong et al. examined the load distribution along the tooth interface of the spline. This misalignment caused the flank contact pattern to change. The misaligned teeth exhibited deflection under load and developed a tilting moment on the gear.
The effect of spline misalignment in rotor-spline couplings is minimized by using a mechanism that reduces backlash. The mechanism comprises cooperably splined male and female members. One member is formed by two coaxially aligned splined segments with end surfaces shaped to engage in sliding relationship. The connecting device applies axial loads to these segments, causing them to rotate relative to one another.
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