Four-wheel-drive hitching control mechanism and tractor

Abstract

The utility model relates to a four-wheel-drive hitching control mechanism and a tractor, the four-wheel-drive hitching control mechanism comprises a control assembly, a linkage assembly and a hitching assembly, and the control assembly is hinged to the linkage assembly; the linkage assembly comprises a linkage rod, a linkage rocker arm and a linkage rotating shaft, the end of the linkage rotating shaft is fixedly connected with the linkage rocker arm, and the linkage rod is hinged to the control assembly and fixedly connected with the linkage rocker arm. The linkage rocker arm is used for driving the linkage rotating shaft to rotate through the linkage rocker arm under the lifting and pressing control of a control assembly; the hooking assembly comprises a hooking shifting rod connected with the linkage rotating shaft, the hooking shifting rod is connected with a hooking shifting fork, and the hooking shifting fork is connected with a meshing sleeve used for clutch transmission. According to the utility model, the stroke of the control mechanism can be reduced, the control force is reduced, and meanwhile, the four-wheel-drive hitching control mechanism is more compact in structure and suitable for equipment conditions with smaller space.

Description

Technical Field

[0001] This application relates to the field of transmission system technology, and more specifically, to a four-wheel drive coupling control mechanism and a tractor. Background Technology

[0002] In the existing four-wheel drive coupling control system, the control mechanism has a large travel and occupies a lot of space, which is not conducive to the application of small tractors.

[0003] At the same time, because the control mechanism has a long travel, a large amount of control force is required to drive it, resulting in a large amount of manpower being consumed in the four-wheel drive engagement process.

[0004] In addition, the current operating mechanism is not compact enough and is not suitable for equipment with limited installation space. Utility Model Content

[0005] The purpose of this application is to provide a four-wheel drive coupling control mechanism and tractor, which can reduce the travel of the control mechanism, reduce the operating force, and at the same time make the structure of the four-wheel drive coupling control mechanism more compact, suitable for equipment with limited space.

[0006] To achieve the above objectives, in a first aspect, the present invention provides a four-wheel drive coupling control mechanism, comprising: a control component, a linkage component, and a coupling component, wherein the control component and the linkage component are hingedly connected.

[0007] The linkage assembly includes a linkage rod, a linkage rocker arm, and a linkage shaft. The end of the linkage shaft is fixedly connected to the linkage rocker arm. The linkage rod is hinged to the control assembly and fixedly connected to the linkage rocker arm, so that the linkage shaft can be driven to rotate by the linkage rocker arm under the lifting and pressing control of the control assembly.

[0008] The engagement assembly includes an engagement lever connected to the linkage shaft, the engagement lever being connected to an engagement fork, and the engagement fork being connected to an engagement sleeve for clutch transmission.

[0009] In an optional embodiment, the control assembly includes a control handle connected to a control link, the control link passing through a sealing bushing and being able to pressurize relative to the sealing bushing.

[0010] In an optional embodiment, the bottom end of the control linkage is connected to a control seat, the end of the linkage rod is hinged to the control seat via a pin, and an elongated hole is provided at the hinged end of the linkage rod for the pin to pass through.

[0011] In an optional embodiment, a fixing plate is also included, through which the linkage shaft passes, and the linkage rocker arm and the hanging assembly are disposed on both sides of the fixing plate, with the fixing plate connected and installed on the side of the transfer case.

[0012] In an optional embodiment, the linkage shaft is connected to the linkage rocker arm via a cylindrical pin, one end of the linkage rod is hinged to the control seat, and the other end is fixedly connected to the rotation root of the linkage rocker arm.

[0013] In an optional embodiment, the end of the linkage rocker arm is connected to a linkage cylinder that can rotate around the linkage shaft. A compression spring is provided inside the linkage cylinder, and a responsive steel ball is provided between the compression spring and the fixed plate. The fixed plate is provided with a ball socket that allows the responsive steel ball to engage.

[0014] In an optional embodiment, a limiting bushing is provided inside the transfer case, the limiting bushing is fixedly installed inside the transfer case, and the linkage shaft passes through the limiting bushing and is connected to the hook lever.

[0015] In an optional embodiment, one end of the hook lever is fixedly sleeved on the linkage shaft, and the hook fork is connected to the other end of the hook lever.

[0016] In an optional embodiment, the engagement sleeve includes a connecting bushing, and the engaging fork is engaged with the side wall of the connecting bushing.

[0017] The engagement sleeve also includes a splined shaft capable of engaging and disengaging with the drive shaft, the splined shaft being coaxially arranged with the connecting sleeve.

[0018] Secondly, this utility model provides a tractor, including the four-wheel drive coupling control mechanism described in any of the foregoing embodiments.

[0019] The four-wheel drive coupling control mechanism in this utility model can reduce the travel distance of the control mechanism and reduce the control force. At the same time, combined with the simplified structural composition of the control mechanism and the connection relationship between different components, the overall structure of the control mechanism can be made more compact, which is suitable for equipment with limited space.

[0020] The four-wheel drive coupling and control mechanism in this utility model is conducive to the supply of smaller container assemblies, is easy to install, and saves connection and installation time.

[0021] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of the four-wheel drive engagement and control mechanism in this application;

[0024] Figure 2 This is a schematic diagram of the internal structure of the linkage component and the hanging component in this application.

[0025] icon:

[0026] 1-Control handle; 2-Control linkage; 3-Sealing bushing; 4-Linked rocker arm; 5-Pin; 6-Compression spring; 7-Linkage cylinder; 8-Response steel ball; 9-Cylindrical pin; 10-Linkage shaft; 11-Hook-on lever; 12-Hook-on fork; 13-Engine sleeve; 14-Linkage rod; 15-Control seat; 16-Fixed plate; 17-Diverter box; 18-Ball socket; 19-Limit sleeve; 20-Connecting sleeve; 21-Splined shaft; 22-Linkage sleeve; 23-Rock arm plate; 24-Lever sleeve. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] The four-wheel drive coupling control mechanism in this application is mainly used in equipment situations with limited space. By combining the components of the control mechanism and the cooperation between different components, the travel distance and control force of the control mechanism are reduced. The overall size of the mechanism is reduced by the compact assembly, which facilitates the supply of small assemblies, makes installation convenient, and saves installation time.

[0031] The four-wheel drive coupling control mechanism of this utility model has a main structure including a control component, a linkage component, and a coupling component.

[0032] The control component is mainly used for manual operation and control. The linkage component is synchronously linked under the control and drives the coupling component to move in a linkage manner, thereby completing the coupling and transmission of the drive shaft through the coupling component.

[0033] The control component is specifically hinged to the linkage component, and can drive the linkage component to move in the direction of engaging or disengaging from the transmission by the lifting and pressing action of the control component.

[0034] The hinged connection allows the control component to control the linkage component to move in different directions when it is pressed down or lifted.

[0035] See Figure 1 as well as Figure 2 Specifically, the linkage assembly includes a linkage rod 14, a linkage rocker arm 4, and a linkage shaft 10. The action of the control assembly is directly transmitted to the linkage rod 14, so that the linkage rod 14 can rotate clockwise under the action of the control assembly pressing down, in combination with the hinge relationship between the linkage rod 14 and the control assembly. Furthermore, while the linkage rod 14 drives the linkage rocker arm 4 to rotate clockwise, the linkage rocker arm 4 and the linkage shaft 10 rotate clockwise synchronously.

[0036] At the same time, the linkage rod 14 can rotate counterclockwise under the action of lifting the control component, which is in conjunction with the hinge relationship between the linkage rod 14 and the control component. Furthermore, the linkage rod 14 drives the linkage rocker arm 4 to rotate counterclockwise, and the linkage rocker arm 4 and the linkage shaft 10 rotate counterclockwise synchronously.

[0037] Based on the rotational relationship formed by the aforementioned linkage shaft 10, the linkage shaft 10 can drive the hook assembly to rotate in the corresponding direction during rotation, thereby driving the engagement sleeve 13, which can mesh with the transmission shaft, to perform clutch engagement transmission.

[0038] From the perspective of the above linkage, the end of the linkage shaft 10 is fixedly connected to the linkage rocker arm 4. Specifically, the end of the linkage shaft 10 is inserted into the linkage sleeve 22 of the linkage rocker arm 4.

[0039] The end of the linkage rod 14 away from the linkage rocker arm 4 is hinged to the control component, and the other end of the linkage rod 14 relative to the hinged end is fixedly connected to the linkage shaft sleeve 22 of the linkage rocker arm 4. This is so that the linkage rod 14 and the control component can be connected under the lifting and pressing control of the control component, so that the linkage rocker arm 4 drives the linkage shaft 10 to rotate under the rotation of the linkage rod 14.

[0040] The engagement assembly includes an engagement lever 11 connected to the linkage shaft 10. When the linkage shaft 10 rotates, it can drive the engagement lever 11 to rotate synchronously. Combined with the engagement fork 12 connected to the engagement lever 11, the rotation of the engagement lever 11 can be converted into linear motion in the left and right directions of the engagement fork 12. Furthermore, under the connection between the engagement fork 12 and the engagement sleeve 13 used for clutch transmission, the engagement sleeve 13 performs linear motion in the left and right directions, completing the engagement or disengagement of the engagement sleeve 13 with the drive shaft, and finally forming the control of four-wheel drive engagement.

[0041] From the perspective of manual operation and control, the control component includes a control handle 1, which is connected to a control linkage 2. The control linkage 2 passes through the sealing liner 3 and can be operated by lifting and pressing relative to the sealing liner 3.

[0042] The sealing liner 3 mainly serves to limit the movement of the control link 2. Combined with the clearance fit between the control link 2 and the sealing liner 3, the control link 2 can be lifted or pressed.

[0043] The bottom end of the control linkage 2 is connected to the control seat 15. The lifting and pressing action of the control linkage 2 is mainly used to drive the control seat 15 to move up and down. The end of the linkage 14 is hinged to the control seat 15 through the pin 5, which can convert the up and down movement of the control seat 15 into the relative rotation of the linkage 14.

[0044] Furthermore, in order to convert the up-and-down movement of the control seat 15 into the relative rotation of the linkage rod 14, the hinged end of the linkage rod 14 on the control seat 15 is provided with an elongated hole (not shown in the figure) through which the pin 5 passes, so that the movement space through the elongated hole can ensure the effectiveness of the action conversion.

[0045] In order to achieve a compact arrangement, the four-wheel drive coupling control mechanism in this utility model also includes a transfer case 17 and a fixing plate 16. The main function of the fixing plate 16 is to allow the linkage shaft 10 to be limited and connected, so as to ensure that the linkage shaft 10 can rotate relative to the fixing plate 16 around its own axis.

[0046] The transfer case 17 is mainly used for the installation of the linkage component structure. Specifically, the linkage shaft 10 passes through the fixed plate 16, and the linkage rocker arm 4 and the hanging component are set on both sides of the fixed plate 16, so that the linkage shaft 10 can drive the hanging component to move synchronously under the limiting action of the fixed plate 16.

[0047] To achieve integrated installation, the fixing plate 16 is connected and installed on the side of the transfer case 17. The linkage shaft 10 is connected to the linkage rocker arm 4 via a cylindrical pin 9. Furthermore, one end of the linkage rod 14 is hinged to the control seat 15 via a pin 5, and the other end is fixedly connected to the rotating root of the linkage rocker arm 4. This allows the linkage shaft 10 to rotate synchronously with the linkage rocker arm 4 under the action of the linkage rod 14.

[0048] The linkage rocker arm 4 specifically includes a linkage bushing 22 fixedly connected to the linkage rod 14, and a rocker arm plate 23 connected to the linkage bushing 22. A linkage cylinder 7 that can rotate around the linkage shaft 10 is connected to the end of the rocker arm plate 23. A compression spring 6 is provided inside the linkage cylinder 7. A response steel ball 8 is provided between the compression spring 6 and the fixed plate 16, which can abut against the side wall of the fixed plate 16. By providing a ball socket 18 on the fixed plate 16 that can be engaged with the response steel ball 8, and the ball socket 18 corresponds to different transmission states of the operating mechanism, this arrangement can help the operator to judge the process state of the operating mechanism.

[0049] To further ensure the stable and reliable installation of the linkage shaft 10 and enable it to rotate around its own axis, a limiting sleeve 19 is provided in the transfer case 17. The limiting sleeve 19 is fixedly installed in the transfer case 17. In order to enhance the compact layout, the limiting sleeve 19 is located near the side of the fixed plate 16 and is close to the transfer case 17. The linkage shaft 10 passes through the limiting sleeve 19 and is connected to the hook lever 11.

[0050] Through the connection and cooperation of the different components mentioned above, a compact layout of the four-wheel drive linkage control mechanism can be formed. This reduces the travel of the linkage structure of the control mechanism while minimizing space, thus reducing the control force to the greatest extent.

[0051] From the perspective of the connection and fit of the hook assembly, one end of the hook lever 11 is fixedly sleeved on the linkage shaft 10, and the hook fork 12 is connected to the other end of the hook lever 11. Preferably, one end of the hook lever 11 is provided with a lever sleeve 24, which is fixedly sleeved on the end of the linkage shaft 10, thereby forming an integral connection between the hook lever 11 and the linkage shaft 10, which makes it easy for the hook lever 11 to follow the linkage shaft 10 and rotate synchronously around the axis of the linkage shaft 10.

[0052] The engagement sleeve 13 includes a connecting bushing 20, and a hook fork 12 is engaged on the side wall of the connecting bushing 20. The hook fork 12 is connected to the other end of the hook lever 11, which can realize the conversion of the rotation of the hook lever 11 into linear motion of the hook fork 12 relative to the engagement sleeve 13 in the axial direction of the left and right sides.

[0053] The engagement sleeve 13 also includes a splined shaft 21 that can engage and disengage with the drive shaft. The splined shaft 21 is specifically used to realize the engagement connection between the engagement sleeve 13 and the drive shaft. By setting the splined shaft 21 and the connecting shaft sleeve 20 coaxially, and combining the integrated structure of the splined shaft 21 and the connecting shaft sleeve 20, a stable and reliable four-wheel drive transmission relationship can be achieved.

[0054] This utility model also provides a tractor, including the four-wheel drive coupling control mechanism described above. The tractor is specifically a small-sized tractor, which can improve the operating conditions of the four-wheel drive coupling control while enhancing the compactness of the four-wheel drive coupling control mechanism layout and reducing the space occupied.

[0055] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0056] The above description is merely a preferred embodiment of this application and is not intended to limit 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 protection scope of this application.

Claims

1. A four-wheel drive engagement and control mechanism, characterized in that, include: The control component, the linkage component, and the mounting component are hinged together; The linkage assembly includes a linkage rod, a linkage rocker arm, and a linkage shaft. The end of the linkage shaft is fixedly connected to the linkage rocker arm. The linkage rod is hinged to the control assembly and fixedly connected to the linkage rocker arm, so that the linkage shaft can be driven to rotate by the linkage rocker arm under the lifting and pressing control of the control assembly. The engagement assembly includes an engagement lever connected to the linkage shaft, the engagement lever being connected to an engagement fork, and the engagement fork being connected to an engagement sleeve for clutch transmission.

2. The four-wheel drive engagement and control mechanism according to claim 1, characterized in that, The control assembly includes a control handle connected to a control link, which passes through a sealing bushing and is capable of applying pressure relative to the sealing bushing.

3. The four-wheel drive engagement and control mechanism according to claim 2, characterized in that, The bottom end of the control linkage is connected to the control seat, and the end of the linkage rod is hinged to the control seat by a pin. An elongated hole is provided at the hinged end of the linkage rod for the pin to pass through.

4. The four-wheel drive engagement and control mechanism according to claim 2, characterized in that, It also includes a fixing plate, through which the linkage shaft passes, and the linkage rocker arm and the hanging assembly are disposed on both sides of the fixing plate. The fixing plate is connected and installed on the side of the transfer case.

5. The four-wheel drive engagement and control mechanism according to claim 3, characterized in that, The linkage shaft is connected to the linkage rocker arm via a cylindrical pin. One end of the linkage rod is hinged to the control seat, and the other end is fixedly connected to the rotation root of the linkage rocker arm.

6. The four-wheel drive engagement and control mechanism according to claim 4, characterized in that, The end of the linkage rocker arm is connected to a linkage cylinder that can rotate around the linkage shaft. A compression spring is provided inside the linkage cylinder. A responsive steel ball is provided between the compression spring and the fixed plate. The fixed plate is provided with a ball socket that can be engaged with the responsive steel ball.

7. The four-wheel drive engagement and control mechanism according to claim 4, characterized in that, The transfer case is equipped with a limiting bushing, which is fixedly installed inside the transfer case. The linkage shaft passes through the limiting bushing and is connected to the hook lever.

8. The four-wheel drive engagement and control mechanism according to claim 1, characterized in that, One end of the hook lever is fixedly sleeved on the linkage shaft, and the hook fork is connected to the other end of the hook lever.

9. The four-wheel drive engagement and control mechanism according to claim 1, characterized in that, The engagement sleeve includes a connecting bushing, and the engaging fork is engaged on the side wall of the connecting bushing; The engagement sleeve also includes a splined shaft capable of engaging and disengaging with the drive shaft, the splined shaft being coaxially arranged with the connecting sleeve.

10. A tractor, characterized in that, Includes the four-wheel drive engagement control mechanism as described in any one of claims 1-9.

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