Gearbox control mechanism and tractor

Abstract

The utility model relates to a gearbox control mechanism and a tractor and relates to the field of variable speed control structures, the gearbox control mechanism comprises a control rod assembly, a main variable speed rotating shaft welding part, a gear selecting spring and a side control cover, the middle of the control rod assembly is fixedly connected with one end of the main variable speed rotating shaft welding part, and the other end of the main variable speed rotating shaft welding part penetrates through the side control cover; and one end of the gear selecting spring is propped against the gear shifting rod, and the other end of the gear selecting spring is fixedly arranged. The control lever assembly has the advantages that under the action of the elastic force of the gear selecting spring, the main speed changing rotating shaft welding part axially moves to the neutral gear position along the main speed changing rotating shaft welding part relative to the side control cover, so that the control lever assembly is located at the same specific position in the neutral gear, and the comfort of a driver can be improved. When gear shifting is needed, the operating rod assembly swings left and right, or firstly overcomes the elastic force of the gear selecting spring to transversely move in the front-back direction and then swings left and right. In this way, the joystick assembly does not need to swing in a large range.

Description

Technical Field

[0001] The utility model relates to the field of speed change control structures, in particular to a gearbox control mechanism and a tractor. Background Art

[0002] At present, the main and auxiliary speed control mechanisms commonly used in tractors are direct pull type. When the speed lever is pulled outward, the speed shift inner dial moves inward. When the speed lever is pulled inward, the speed shift inner dial moves outward and stops at the last pulled position. During the use of the direct pull type speed control structure, due to the problem of large movement trajectory of the joystick handle ball during the gear shifting process, it cannot meet the overseas demand for the movement trajectory of the speed lever to be as small as possible. The operating lever is easy to hit the driver's legs, and the driver's operation comfort is not high. Utility Model Content

[0003] The technical problem to be solved by the utility model is how to reduce the movement range of the joystick assembly.

[0004] The utility model solves the above-mentioned technical problem with the following technical solution: a gearbox operating mechanism, comprising an operating lever assembly, a main speed change shaft welded together, a gear selection spring and a side operating cover, wherein the middle portion of the operating lever assembly is fixedly connected to one end of the main speed change shaft welded together, the other end of the main speed change shaft welded together passes through the side operating cover and abuts against one end of the gear selection spring, and the other end of the gear selection spring is fixedly arranged.

[0005] The utility model has the beneficial effect that under the elastic force of the gear selection spring, the main gear shift shaft weld moves axially relative to the side operating cover along the main gear shift shaft weld to a neutral position, so the joystick assembly is in the same specific position when in neutral, which can improve the driver's comfort. Moreover, when shifting is required, the joystick assembly swings left and right, or first overcomes the elastic force of the gear selection spring and moves horizontally in the front-to-back direction, and then swings left and right. In this way, the joystick assembly does not need to swing over a large range.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, it also includes a lower operating ball head connecting rod, one end of which is connected to the lower end of the operating rod assembly by a ball joint, and the other end of which is connected to the side operating cover by a ball joint.

[0008] The beneficial effect of adopting the above further solution is that the lower operating ball head connecting rod limits the movement range of the lower end of the operating lever assembly, so that the swing amplitude of the operating lever assembly is not too large, and gear shifting is achieved with a very small stroke.

[0009] Furthermore, it also includes a lower operating ball head and a joystick ball head, the lower operating ball head is fixedly connected to the side operating cover, the joystick ball head is fixedly connected to the lower end of the joystick assembly, one end of the lower operating ball head connecting rod is connected to the joystick ball head by a ball joint, and the other end thereof is connected to the lower operating ball head by a ball joint.

[0010] The beneficial effect of adopting the above further solution is that the two ends of the lower operating ball head connecting rod are respectively connected to the lower operating ball head and the operating rod ball head by ball joints.

[0011] Furthermore, it also includes a mounting seat, which is fixedly connected to the side operating cover, and the lower operating ball head is fixed on the mounting seat.

[0012] The beneficial effect of adopting the above further solution is that the lower operating ball head is installed on the side operating cover through the mounting seat.

[0013] Furthermore, it also includes a sealing ring, which is fixedly connected to the side operating cover and is sealingly sleeved on the welded outer side of the main transmission shaft.

[0014] The beneficial effect of adopting the above further solution is that the sealing ring seals the gap between the main transmission shaft weld and the side control cover.

[0015] Furthermore, the joystick assembly includes a main speed control handle, a main speed control rod weld and a main speed lower control rod weld. The main speed control handle, the main speed control rod weld and the main speed lower control rod weld are fixedly connected in sequence from top to bottom, and the middle part of the main speed lower control rod weld is fixedly connected to one end of the main speed shaft weld.

[0016] The beneficial effect of adopting the above further scheme is that the driver operates the main speed control handle, thereby driving the main speed lower control lever welding to swing or move through the main speed control rod welding, and the main speed lower control lever welding drives the main speed shaft welding to swing or move.

[0017] Furthermore, it also includes a main and auxiliary speed change operating shaft sleeve, which is fixedly connected to the middle part of the main speed lower operating rod welded together, and the main and auxiliary speed change operating shaft sleeve is fixedly sleeved on the outer side of one end of the main speed change shaft welded together.

[0018] The beneficial effect of adopting the above further solution is that the main speed lower operating lever is welded and fixed to the main speed rotating shaft through the main and auxiliary speed operating rotating shaft sleeves.

[0019] Furthermore, the main shift joystick welding includes a joystick cross bar and a joystick longitudinal bar, the lower end of the joystick longitudinal bar is fixedly connected to one end of the joystick cross bar, the main shift joystick handle is fixedly connected to the upper end of the joystick longitudinal bar, and the other end of the joystick cross bar is fixedly connected to the upper end of the main shift lower joystick welding.

[0020] The beneficial effect of adopting the above further solution is that the main speed change lever is welded into an L-shaped structure, which is beneficial to the space layout in the cab, avoids the driver's legs, and improves the driver's operating comfort.

[0021] Furthermore, it also includes a toggle member, and the other end of the main speed change shaft welded is fixedly connected to one end of the toggle member.

[0022] The beneficial effect of adopting the above further solution is that the main transmission shaft is welded to push the shift fork shaft to move through the shifting member, thereby achieving gear shifting.

[0023] The utility model also provides a tractor, comprising the gearbox operating mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a front view of a gearbox operating mechanism of the utility model;

[0025] Figure 2 for Figure 1 AA sectional view of a gearbox operating mechanism.

[0026] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0027] 1. Main speed control handle; 2. Main speed control rod welded; 3. Main speed lower control rod welded; 4. Side control cover; 5. Lower control ball head connecting rod; 6. Lower control ball head; 7. Mounting seat; 8. Sealing ring; 9. Shift spring; 10. Main and auxiliary speed control shaft sleeves; 11. Circlip; 12. Main speed shaft welded. DETAILED DESCRIPTION

[0028] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0029] like Figure 1 and Figure 2 As shown, this embodiment provides a gearbox operating mechanism, including an operating lever assembly, a main speed shaft weld 12, a gear selection spring 9 and a side operating cover 4, wherein the middle portion of the operating lever assembly is fixedly connected to one end of the main speed shaft weld 12, the other end of the main speed shaft weld 12 passes through the side operating cover 4 and abuts against one end of the gear selection spring 9, and the other end of the gear selection spring 9 is fixedly arranged.

[0030] Under the elastic force of the gear selection spring 9, the main gear shift shaft weld 12 moves axially to the neutral position relative to the side operating cover 4 along the main gear shift shaft weld 12, so the joystick assembly is in the same specific position when in neutral, which can improve the driver's comfort. In addition, when shifting gears, the joystick assembly swings left and right, or first overcomes the elastic force of the gear selection spring 9 and moves horizontally in the front-to-back direction, and then swings left and right. In this way, the joystick assembly does not need to swing over a large range.

[0031] Optionally, the joystick assembly is an integrally formed rod, or is made by connecting a plurality of rods.

[0032] Based on any of the above schemes, the gearbox operating mechanism also includes a lower operating ball head connecting rod 5, one end of which is ball-jointed to the lower end of the operating rod assembly, and the other end is ball-jointed to the side operating cover 4.

[0033] The lower operating ball head connecting rod 5 limits the moving range of the lower end of the operating lever assembly, so that the swing amplitude of the operating lever assembly is not too large, and the gear shifting is achieved with a very small stroke.

[0034] Specifically, since the joystick assembly needs to achieve lateral movement and rotation around the axis of the main transmission shaft weld 12, in order to limit the movement range of the lower end of the joystick assembly, the lower joystick ball head connecting rod 5 is preferably installed in a ball joint connection manner.

[0035] Based on any of the above schemes, the gearbox operating mechanism also includes a lower operating ball head 6 and a joystick ball head, the lower operating ball head 6 is fixedly connected to the side operating cover 4, the joystick ball head is fixedly connected to the lower end of the joystick assembly, one end of the lower operating ball head connecting rod 5 is ball-jointed to the joystick ball head, and the other end thereof is ball-jointed to the lower operating ball head 6.

[0036] The two ends of the lower operating ball head connecting rod 5 are respectively connected to the lower operating ball head 6 and the operating rod ball head by ball joints.

[0037] Specifically, the gearbox operating mechanism also includes two retaining springs 11, which are respectively clamped on the outer sides of the connection between the lower operating ball head 6 and the joystick ball head to prevent the lower operating ball head 6 and the joystick ball head from falling out of the ball sockets connected thereto.

[0038] On the basis of any of the above solutions, the gearbox operating mechanism further includes a mounting seat 7 , the mounting seat 7 is fixedly connected to the side operating cover 4 , and the lower operating ball head 6 is fixed on the mounting seat 7 .

[0039] The lower operating ball head 6 is mounted on the side operating cover 4 through a mounting seat 7 .

[0040] On the basis of any of the above solutions, the gearbox operating mechanism further comprises a sealing ring 8 , which is fixedly connected to the side operating cover 4 and sealingly sleeved on the outer side of the main transmission shaft weld 12 .

[0041] The sealing ring 8 seals the gap between the main transmission shaft weld 12 and the side operating cover 4 .

[0042] Specifically, the sealing ring 8 is a lip-shaped sealing ring with a skeleton rotating shaft. Alternatively, the sealing ring 8 can also be a sealing ring in other forms.

[0043] On the basis of any of the above schemes, the joystick assembly includes a main speed control handle 1, a main speed control lever weld 2 and a main speed lower control lever weld 3. The main speed control handle 1, the main speed control lever weld 2 and the main speed lower control lever weld 3 are fixedly connected in sequence from top to bottom, and the middle part of the main speed lower control lever weld 3 is fixedly connected to one end of the main speed rotating shaft weld 12.

[0044] The driver operates the main speed control handle 1, thereby driving the main speed lower control rod weld 3 to swing or move through the main speed control rod weld 2, and the main speed lower control rod weld 3 drives the main speed shaft weld 12 to swing or move.

[0045] Specifically, the joystick ball head is fixed to the lower end of the main transmission lower joystick weld 3, and the main transmission lower joystick weld 3 is ball-jointedly connected to the lower joystick ball head connecting rod 5 through the joystick ball head.

[0046] Based on any of the above schemes, the gearbox operating mechanism also includes a main and auxiliary speed control rotating shaft sleeve 10, which is fixedly connected to the middle part of the main speed lower operating lever weld 3, and the main and auxiliary speed control rotating shaft sleeve 10 is fixedly sleeved on the outer side of one end of the main speed shaft weld 12.

[0047] The main speed change lower operating lever weld 3 is fixed to the main speed change rotating shaft weld 12 through the main and auxiliary speed change operating rotating shaft sleeve 10.

[0048] Based on any of the above schemes, the main speed shift joystick weld 2 includes a joystick cross bar and a joystick longitudinal bar, the lower end of the joystick longitudinal bar is fixedly connected to one end of the joystick cross bar, the main speed shift control handle 1 is fixedly connected to the upper end of the joystick longitudinal bar, and the other end of the joystick cross bar is fixedly connected to the upper end of the main speed lower joystick weld 3.

[0049] The main speed change lever weld 2 is an L-shaped structure, which is beneficial to the space arrangement in the cab, avoids the driver's legs, and improves the driver's operating comfort.

[0050] Alternatively, the main gearshift lever weld 2 may also be a straight rod, or a curved rod with an arc in the middle.

[0051] On the basis of any of the above solutions, the gearbox operating mechanism further includes a toggle member, and the other end of the main transmission shaft weld 12 is fixedly connected to one end of the toggle member.

[0052] The main speed change shaft weld 12 pushes the shift fork shaft to move through the shifting member, thereby achieving gear shifting.

[0053] Specifically, the toggle member is fixed to the lower side of the other end of the main speed shaft weld 12; or, one end of the toggle member is sleeved on the outside of the other end of the main speed shaft weld 12. The other end of the main speed shaft weld 12 has a groove, and one end of the gear selection spring 9 abuts against the groove.

[0054] In one specific embodiment, when the third and fourth gears are in neutral position, under the action of the spring force of the shift spring 9 (the rear end of the shift spring 9 is against the cavity, the shift spring 9 is in a compressed state, and the cavity is not shown in the figure), the main transmission shaft weld 12 is in a state as shown in FIG. Figure 2 In the position shown, there is a gap between the main and auxiliary speed change control shaft sleeve 10 and the side control cover 4. That is to say, at this time, the main and auxiliary speed change control shaft sleeve 10, the main speed change lower control lever weld 3 and the main speed change control lever weld 2 are located in the front position, away from the middle of the cab, so that the space in the cab can be larger.

[0055] At this time, if Figure 1 As shown, when the main speed change control handle 1 is swung to the right, the main speed change lower control rod weld 3 drives the main and auxiliary speed change control shaft sleeve 10 to rotate clockwise, the main speed change shaft weld 12 moves clockwise, and the main speed change shaft weld 12 drives the toggle member to rotate, so that the toggle member moves the third and fourth gear shift fork shaft to the left and engages in the fourth gear; when the main speed change control handle 1 is swung to the left, the main speed change lower control rod weld 3 drives the main and auxiliary speed change control shaft sleeve 10 to rotate counterclockwise, the main speed change shaft weld 12 moves counterclockwise, and the main speed change shaft weld 12 drives the toggle member to rotate, so that the toggle member moves the third and fourth gear shift fork shaft to the right and engages in the third gear. During the gear shifting process, under the limit of the lower control ball head connecting rod 5, the swing amplitude of the main speed change control handle 1 is not too large, and the gear shifting is achieved with a small stroke.

[0056] When the main speed change control handle 1 is operated backward, the spring force of the gear selection spring 9 is overcome, and the shifting member connected to the main speed change shaft welding 12 enters the shift fork of the first and second gears, and then the shifting action is the same as the shifting action of the third and fourth gears (the main speed change control handle 1 swings left and right to realize the switching between the first and second gears).

[0057] This embodiment also provides a tractor, comprising the above-mentioned transmission operating mechanism.

[0058] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0059] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0060] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0061] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gearbox operating mechanism, characterized in that: The invention comprises an operating lever assembly, a main speed change rotating shaft weld (12), a gear selection spring (9) and a side operating cover (4), wherein the middle portion of the operating lever assembly is fixedly connected to one end of the main speed change rotating shaft weld (12), the other end of the main speed change rotating shaft weld (12) passes through the side operating cover (4) and abuts against one end of the gear selection spring (9), and the other end of the gear selection spring (9) is fixedly arranged.

2. A gearbox operating mechanism according to claim 1, characterized in that: It also comprises a lower operating ball head connecting rod (5), one end of which is ball-jointedly connected to the lower end of the operating rod assembly, and the other end of which is ball-jointedly connected to the side operating cover (4).

3. A gearbox operating mechanism according to claim 2, characterized in that: It also comprises a lower operating ball head (6) and an operating rod ball head, wherein the lower operating ball head (6) is fixedly connected to the side operating cover (4), the operating rod ball head is fixedly connected to the lower end of the operating rod assembly, one end of the lower operating ball head connecting rod (5) is connected to the operating rod ball head by a ball joint, and the other end of the lower operating ball head connecting rod (5) is connected to the lower operating ball head (6) by a ball joint.

4. A gearbox operating mechanism according to claim 3, characterized in that: It also comprises a mounting seat (7), wherein the mounting seat (7) is fixedly connected to the side operating cover (4), and the lower operating ball head (6) is fixed on the mounting seat (7).

5. A gearbox operating mechanism according to claim 1, characterized in that: It also includes a sealing ring (8), which is fixedly connected to the side operating cover (4) and is sealingly sleeved on the outside of the main transmission shaft weld (12).

6. A gearbox operating mechanism according to claim 1, characterized in that: The control lever assembly comprises a main speed control handle (1), a main speed control lever weld (2) and a main speed lower control lever weld (3); the main speed control handle (1), the main speed control lever weld (2) and the main speed lower control lever weld (3) are fixedly connected in sequence from top to bottom; the middle of the main speed lower control lever weld (3) is fixedly connected to one end of the main speed rotating shaft weld (12).

7. A gearbox operating mechanism according to claim 6, characterized in that: It also includes a main and auxiliary speed change operating shaft sleeve (10), the main and auxiliary speed change operating shaft sleeve (10) is fixedly connected to the middle of the main speed change lower operating rod weld (3), and the main and auxiliary speed change operating shaft sleeve (10) is fixedly sleeved on the outer side of one end of the main speed change rotating shaft weld (12).

8. A gearbox operating mechanism according to claim 6, characterized in that: The main speed change lever weld (2) comprises a lever cross bar and a lever longitudinal bar, the lower end of the lever longitudinal bar is fixedly connected to one end of the lever cross bar, the main speed change operating handle (1) is fixedly connected to the upper end of the lever longitudinal bar, and the other end of the lever cross bar is fixedly connected to the upper end of the main speed change lower lever weld (3).

9. A gearbox operating mechanism according to any one of claims 1 to 8, characterized in that: It also includes a toggle member, and the other end of the main speed change shaft welded (12) is fixedly connected to one end of the toggle member.

10. A tractor, characterized in that: It comprises a gearbox operating mechanism as described in any one of claims 1-9.

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