A tractor power take-off drive shaft assembly

Abstract

The application discloses a tractor power output transmission shaft assembly, which comprises an input matching shaft sleeve, an angle adjusting component, an outer spline half shaft, an inner spline half shaft and an output matching shaft sleeve. The angle adjusting component realizes angle adjustment in a power transmission process through a cross shaft and a universal joint structure, and the maximum adjustment angle can reach ±30°. The outer spline half shaft and the inner spline half shaft are connected through spline matching and are provided with a damping structure, so that vibration and impact are effectively relieved. The length of the transmission shaft is adjustable, and different installation requirements can be met. The assembly has reasonable structure, flexible adjustment and stable transmission, has rust-proof and wear-resistant characteristics, and is suitable for power transmission of a tractor power output system under complex working conditions.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery transmission technology, specifically to a tractor power output transmission shaft assembly. Background Technology

[0002] A tractor is a self-propelled power machine used to traction and drive agricultural machinery to complete various mobile operations. It can also be used as a stationary power source. Wheeled tractors are widely used in my country's agricultural machinery field. After many years of development, there has been significant progress in the matching and application of agricultural implements. In particular, the rear-mounted power output and suspension system are relatively complete. However, when equipped with front-drive implements such as harvesters, it is often necessary to transmit power from the rear of the tractor to the front through multiple drive shafts, sprockets, chains and other devices to drive the implements.

[0003] Tractors, as agricultural power machinery, commonly use their power take-off (PTO) systems to drive various agricultural implements. Traditional driveshafts are mostly rigid connections with limited angle adjustment capabilities, easily leading to problems such as poor transmission, excessive vibration, and easy damage when encountering complex terrain or changes in implement posture. Furthermore, the splined connection of the driveshaft is prone to wear during frequent extension, contraction, and torsion, affecting transmission efficiency and service life. Therefore, there is an urgent need for a driveshaft assembly that is angle-adjustable, has good shock absorption performance, is highly adaptable, and durable. Utility Model Content

[0004] This invention addresses the problems of poor angle adjustment capability, insufficient shock absorption performance, and weak adaptability of existing drive shafts by providing a tractor power output drive shaft assembly with a reasonable structure, flexible adjustment, and strong durability. It includes an input mating bushing, an angle adjustment component, an external splined half-shaft, an internal splined half-shaft, and an output mating bushing. The input mating bushing is connected to the power output end of the tractor, and an angle adjustment component is provided on the left side of the input mating bushing. The angle adjustment components are respectively installed between the input mating bushing and the outer spline half shaft, and between the inner spline half shaft and the output mating bushing, for adjusting the transmission angle; The angle adjustment component includes a cross shaft, limit posts, a universal joint, and a mating pin. The cross shaft is coaxially connected to the outer spline half shaft and the inner spline half shaft, respectively. Four limit posts are symmetrically arranged on the outer wall of the cross shaft. The universal joint is engaged with the limit posts, thereby rotating with the cross shaft. The other side of the universal joint is engaged with the input mating bushing and the output mating bushing, respectively, and a mating pin is provided at the engagement position. The external spline half-shaft and the internal spline half-shaft are connected by a spline fit. The output bushing is connected to the internal spline half-shaft and is used to output power.

[0005] Preferably, the external spline half-shaft includes a high-strength shock-absorbing bushing and an internal meshing groove, wherein the internal meshing groove is located on the inner wall of the high-strength shock-absorbing bushing.

[0006] Preferably, the internal spline half-shaft includes a shim and a mating spline inside, and the shim is coaxially disposed inside the mating spline to provide shock absorption for the spline mating connection.

[0007] Preferably, the internal engagement groove matches the size specifications of the mating spline.

[0008] Preferably, the input mating bushing and the output mating bushing are respectively mated and connected to the input gearbox and the output gearbox.

[0009] Preferably, the driveshaft assembly is suitable for a tractor power output system, enabling power transmission and angle adjustment.

[0010] Preferably, the lengths of the external spline half-shaft and the internal spline half-shaft are adjustable to accommodate different installation distances.

[0011] Preferably, the maximum adjustment angle of the angle adjustment component is ±30°.

[0012] Preferably, the drive shaft assembly is treated with rust prevention and wear resistance as a whole, making it suitable for harsh working environments of agricultural machinery.

[0013] Compared with the prior art, the present invention provides a tractor power take-off transmission shaft assembly, which has the following beneficial effects: 1. During operation, the drive shaft assembly is connected through internal angle adjustment components, making the axial engagement angle more flexible and adaptable to complex terrain and changes in the posture of agricultural implements; 2. The internal spline connection of the drive shaft assembly is equipped with a shock-absorbing structure, which can effectively reduce vibration and noise during axial power transmission, thereby further improving the service life of the drive shaft; 3. The internal spline half-shaft length of this drive shaft assembly is adjustable to adapt to the installation requirements of different models of tractors and agricultural implements. At the same time, the whole assembly is treated with anti-rust and wear-resistant treatment, making it suitable for harsh working environments of agricultural machinery and with a long service life. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the structure of the drive shaft assembly; Figure 2 This is a structural schematic diagram of the angle adjustment component in a specific embodiment of the drive shaft assembly; Figure 3 This is a schematic diagram of the structure of the external spline half shaft in a specific embodiment of this drive shaft assembly; Figure 4 This is a schematic diagram of the internal spline half-shaft in a specific embodiment of this drive shaft assembly; Figure 5 This is a diagram showing the working state of this drive shaft assembly in a specific embodiment.

[0015] In the diagram: 1. Input mating bushing; 2. Angle adjustment component; 3. External spline half-shaft; 4. Internal spline half-shaft; 5. Output mating bushing; 101. Cross shaft; 102. Limiting pin; 103. Universal joint; 104. Mating pin; 201. High-strength shock-absorbing bushing; 202. Internal meshing groove; 301. Shim; 302. Mating spline; 1001. Input gearbox; 1002. Output gearbox. Detailed Implementation

[0016] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0018] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0019] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0020] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0021] Example 1: like Figure 1-5 As shown, the present invention provides a tractor power output transmission shaft assembly, mainly comprising an input mating bushing 1, an angle adjustment component 2, an external spline half-shaft 3, an internal spline half-shaft 4, and an output mating bushing 5. The input mating bushing 1 is connected to the input gearbox 1001 at the tractor's power output end, and the output mating bushing 5 is connected to the output gearbox 1002 at the implement end, thereby realizing power transmission.

[0022] The angle adjustment component 2 has two locations, one between the input mating sleeve 1 and the outer spline half-shaft 3, and the other between the inner spline half-shaft 4 and the output mating sleeve 5. Figure 2 As shown, each angle adjustment component 2 includes a cross shaft 101, a limiting post 102, a universal joint 103, and a mating pin 104. The cross shaft 101 is coaxially connected to the external spline half shaft 3 or the internal spline half shaft 4 through journals at both ends. Four limiting posts 102 are symmetrically arranged on the outer wall of the cross shaft 101. The universal joint 103 engages with the limiting posts 102 through its internal groove, allowing the universal joint 103 to rotate around the cross shaft 101. The other side of the universal joint 103 is swayably connected to the input mating sleeve 1 or the output mating sleeve 5 through the mating pin 104, thereby realizing angle adjustment during power transmission. The maximum adjustment angle can reach ±30°.

[0023] The structure of the external spline half-shaft 3 is as follows Figure 3 As shown, it has a high-strength shock-absorbing bushing 201 and an internal meshing groove 202 inside. The structure of the internal spline half-shaft 4 is as follows: Figure 4As shown, it contains a shim 301 and a mating spline 302. The outer spline half-shaft 3 and the inner spline half-shaft 4 are connected and transmitted through the spline engagement of the inner meshing groove 202 and the mating spline 302. The spline engagement not only ensures effective torque transmission but also allows for a certain amount of axial movement between the two half-shafts, thus accommodating different installation distances. The shim 301 and the high-strength shock-absorbing bushing 201 work together to effectively absorb and mitigate vibrations and impacts generated during transmission, improving the smoothness of transmission and the lifespan of components.

[0024] Figure 5 A schematic diagram of the driveshaft assembly in actual working condition is shown. There may be relative displacement and angular deflection between the tractor and the implement. This driveshaft assembly, through its angle adjustment component 2 and retractable spline connection, can compensate for these changes and ensure continuous and stable power transmission.

[0025] In addition, the entire drive shaft assembly has undergone rust-proofing and wear-resistant treatment, such as surface galvanizing or spraying with special protective paint, to adapt to harsh working environments such as dusty and humid farmland and extend its service life.

[0026] This invention is easy to install, highly reliable, and can be widely applied to the power output systems of various tractors, effectively improving transmission efficiency and adaptability.

[0027] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0028] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0029] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A tractor power take-off drive shaft assembly, characterized in that, This includes an input mating bushing, an angle adjustment component, an external spline half-shaft, an internal spline half-shaft, and an output mating bushing; The input mating bushing is connected to the power output end of the tractor, and an angle adjustment component is provided on the left side of the input mating bushing. The angle adjustment components are respectively installed between the input mating bushing and the outer spline half shaft, and between the inner spline half shaft and the output mating bushing, for adjusting the transmission angle; The angle adjustment component includes a cross shaft, limit posts, a universal joint, and a mating pin. The cross shaft is coaxially connected to the outer spline half shaft and the inner spline half shaft, respectively. Four limit posts are symmetrically arranged on the outer wall of the cross shaft. The universal joint is engaged with the limit posts, thereby rotating with the cross shaft. The other side of the universal joint is engaged with the input mating bushing and the output mating bushing, respectively, and a mating pin is provided at the engagement position. The external spline half-shaft and the internal spline half-shaft are connected by a spline fit. The output bushing is connected to the internal spline half-shaft and is used to output power.

2. The drive shaft assembly according to claim 1, characterized in that, The external spline half-shaft includes a high-strength shock-absorbing bushing and an internal meshing groove, with the internal meshing groove located on the inner wall of the high-strength shock-absorbing bushing.

3. The drive shaft assembly according to claim 1, characterized in that, The internal spline half-shaft includes a shim and a mating spline. The shim is coaxially positioned inside the mating spline to provide shock absorption for the spline mating connection.

4. The drive shaft assembly according to claim 2, characterized in that, The internal meshing groove is matched with the size and specifications of the mating spline.

5. The drive shaft assembly according to claim 1, characterized in that, The input mating bushing and the output mating bushing are respectively mated and connected to the input gearbox and the output gearbox.

6. The drive shaft assembly according to claim 1, characterized in that, The driveshaft assembly is suitable for tractor power output systems and can realize power transmission and angle adjustment.

7. The drive shaft assembly according to claim 1, characterized in that, The lengths of the external spline half-shaft and the internal spline half-shaft are adjustable to accommodate different installation distances.

8. The drive shaft assembly according to claim 1, characterized in that, The maximum adjustment angle of the angle adjustment component is ±30°.

9. The drive shaft assembly according to claim 1, characterized in that, The drive shaft assembly is treated with rust prevention and wear resistance, making it suitable for harsh working environments in agricultural machinery.

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