Auxiliary speed change control device and tractor with same

Abstract

The utility model relates to the technical field of agricultural equipment, in particular to an auxiliary speed change control device and a tractor with the same. The auxiliary speed change control device comprises a control gear shifting handle, a rocker arm, a fixing plate and a control pull rod, the lower end of the control gear shifting handle is rotationally installed on one side of the fixing plate, the rocker arm is fixedly connected with the lower end of the control gear shifting handle, the upper end of the control pull rod is movably connected with the rocker arm, and the lower end of the control pull rod is fixedly connected with the fixing plate. The lower end of the control pull rod is movably connected with one end of a gear shifting rocker arm, a self-locking structure matched with the rocker arm is arranged on the fixing plate, and when the control gear shifting handle is in a neutral gear state, the self-locking structure and the rocker arm are locked. The self-locking device has the advantages of being simple and reasonable in structural design, convenient to assemble, not prone to being polluted by impurities such as dust and the like, convenient to maintain and capable of achieving self-locking at the neutral gear, and the modular structural design is adopted.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery and equipment, in particular to an auxiliary speed change control device and a tractor with the same. Background Art

[0002] At present, customers have put forward higher requirements for the comfort of tractor operation and the simplicity of maintenance. The auxiliary speed control of traditional tractors often uses a pull rod with a rotating shaft structure, such as Figure 1 As shown, the pull rod is connected to the shaft. The shaft is connected to the shaft sleeve, which is fixed on the lower side of the vehicle body, and the shaft is connected to the rocker arm, which is connected to the pull rod, which is connected to the shift shaft. In addition, due to the harsh working environment of the tractor, the shaft sleeve is prone to water and soil entering the gap at the junction with the shaft after long-term use, causing wear and rust, etc., resulting in reduced transmission efficiency, gradually increasing operating force, and it is difficult to meet the demand for control comfort.

[0003] Based on this, it is necessary to develop a new auxiliary speed change control device to solve the above-mentioned technical problems. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a secondary speed change control device and a tractor with the same, which effectively overcomes the defects of the prior art.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A sub-speed shift operating device includes a shift operating handle, a rocker arm, a fixed plate and an operating rod, wherein the lower end of the shift operating handle is rotatably mounted on one side of the fixed plate, the rocker arm is fixedly connected to the lower end of the shift operating handle, the upper end of the operating rod is movably connected to the rocker arm, the lower end of the operating rod is movably connected to one end of the shift rocker arm, a self-locking structure adapted to the rocker arm is provided on the fixed plate, and the self-locking structure is locked with the rocker arm when the shift operating handle is in a neutral state.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, a horizontal rotating shaft sleeve is fixed to the lower end of the above-mentioned operating shift handle, and a rotating shaft vertically connected and fixed to the above-mentioned fixing plate is passed through the above-mentioned rotating shaft sleeve, and the above-mentioned rocker arm is connected and fixed to the above-mentioned rotating shaft sleeve.

[0009] Furthermore, the rocker arm includes a fan-shaped main body component, the shaft sleeve is vertically connected and fixed to one side of the fan core of the main body component, the shaft passes through the fan core of the rocker arm, and the arc edge of the main body component is at its upper end, and the fan core of the main body component is integrally connected with a connecting arm extending obliquely downward, and the end of the connecting arm is hinged to the upper end of the operating rod.

[0010] Furthermore, the self-locking structure includes a mounting plate, a self-locking sleeve, an elastic member and a locking ball arranged on one side of the upper end of the fixing plate, the mounting plate is located above the main body component, the arc edge of the main body component is provided with an engaging opening adapted to the locking ball at a position deviating from the midpoint, the self-locking sleeve is installed through the mounting plate, the elastic member is installed in the self-locking sleeve, the locking ball is installed in the self-locking sleeve port and is connected to the elastic member, and the locking ball is located between the self-locking sleeve and the arc edge of the main body component, and when the operating shift handle is in a neutral state, the locking ball is embedded in the engaging opening.

[0011] Furthermore, the outer surface of the self-locking sleeve is provided with threads, and the mounting plate is penetrated by a threaded hole, and the self-locking sleeve is screwed into the threaded hole.

[0012] Furthermore, the elastic member is a spring.

[0013] Furthermore, the mounting plate and the fixing plate are integrally formed.

[0014] Furthermore, the lower end of the operating rod is connected to a length adjustment rod, and the upper end of the operating shift handle and the lower end of the length adjustment rod are respectively connected to an upper pull fork and a lower pull fork, the upper pull fork is movably connected to the rocker arm, and the lower pull fork is movably connected to one end of the shift rocker arm.

[0015] Furthermore, the above-mentioned length adjustment rod includes a vertically arranged adjustment rod body, the above-mentioned adjustment rod body is provided with a threaded through hole running through it from top to bottom, the lower end of the above-mentioned operating pull rod is provided with a first threaded section, the above-mentioned first threaded section is screwed into the upper end of the above-mentioned adjustment rod body, a first locking nut is screwed on the above-mentioned first threaded section, and the upper end of the above-mentioned pull-down fork is provided with an externally threaded connecting column, and the above-mentioned externally threaded connecting column is threadedly connected to the lower end of the above-mentioned adjustment rod body.

[0016] The beneficial effects of the utility model are: simple and reasonable structural design, modular structural design, convenient assembly, and at the same time, it is not easily polluted by impurities such as dust, and maintenance is also relatively convenient, and it can also achieve self-locking when in neutral.

[0017] A tractor is also provided, comprising a secondary speed change control device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a structural schematic diagram of a tractor auxiliary speed change control in the prior art;

[0019] Figure 2 It is a structural elevation view of the auxiliary speed change control device of the utility model;

[0020] Figure 3 It is a structural side view of the auxiliary speed change control device of the utility model;

[0021] Figure 4 It is a partial structural schematic diagram of the cooperation between the self-locking structure and the rocker arm in the auxiliary speed change control device of the utility model.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 1. Shift handle; 2. Rocker arm; 3. Fixed plate; 4. Operating rod; 5. Shift rocker arm; 6. Self-locking structure; 11. Rotating shaft sleeve; 21. Main body; 22. Connecting arm; 31. Rotating shaft; 41. Length adjustment rod; 42. Upper pull fork; 43. Lower pull fork; 61. Mounting plate; 62. Self-locking sleeve; 63. Locking ball; 411. Adjusting rod body; 412. First locking nut. DETAILED DESCRIPTION

[0024] 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.

[0025] Example 1

[0026] like Figure 2 and 3 As shown, the auxiliary speed control device of this embodiment includes a control shift handle 1, a rocker arm 2, a fixed plate 3 and an operating rod 4. The lower end of the control shift handle 1 is rotatably mounted on one side of the fixed plate 3, the rocker arm 2 is fixedly connected to the lower end of the control shift handle 1, the upper end of the operating rod 4 is movably connected to the rocker arm 2, and the lower end of the operating rod 4 is movably connected to one end of a shift rocker arm 5. The fixed plate 3 is provided with a self-locking structure 6 adapted to the rocker arm 2. When the control shift handle 1 is in a neutral state, the self-locking structure 6 is locked with the rocker arm 2.

[0027] Compared with the existing control device, the auxiliary speed change control device of this embodiment adopts modular structure design for the control shift handle 1, the fixing plate 3 and the control rod 4, so that the overall product structure is relatively simple. Compared with the existing complicated structure, the production process is simpler and the convenience of maintenance is improved. The specific operation process is as follows:

[0028] When in neutral, the self-locking structure 6 is locked with the rocker arm 2. When shifting is required, the shift handle 1 is pushed forward, and the shift handle 1 and the rocker arm 2 are rotated around the connection point of the fixed plate 3 as a whole, and the locking state of the self-locking structure 6 and the rocker arm 2 is released (that is, unlocked). The rotation of the rocker arm 2 drives the operating rod 4 to move upward, and the operating rod 4 synchronously drives the shift rocker arm 5 to move the same distance. Finally, the predetermined function of driving the shift head to shift gears is achieved through the rotation of the shift rocker arm 5.

[0029] When it is necessary to shift back to neutral, push the shift handle 1 backward, and the shift handle 1 and the rocker arm 2 rotate as a whole. The rocker arm 2 drives the operating rod 4 to move downward, and the operating rod 4 simultaneously drives the shift rocker arm 5 to move the same distance. Finally, the shift rocker arm 5 rotates in the opposite direction to achieve the predetermined function of driving the shift head to shift back to neutral.

[0030] It should be supplemented that: when the auxiliary speed change control device of this embodiment is installed, the fixing plate 3 is installed on the upper side of the vehicle body.

[0031] As a preferred embodiment, a horizontal shaft sleeve 11 is fixed to the lower end of the above-mentioned operating shift handle 1, and a shaft 31 vertically connected and fixed to the above-mentioned fixing plate 3 is passed through the above-mentioned shaft sleeve 11, and the above-mentioned rocker arm 2 is connected and fixed to the above-mentioned shaft sleeve 11.

[0032] In the above implementation scheme, the shift handle 1 is assembled with the fixed plate 3 through the shaft sleeve 11 that rotates with the shaft 31. The assembly structure of the two is simple and the relative rotation performance is not easily affected by dust and other impurities. The shift operation is relatively simple and quick.

[0033] In this embodiment, the rocker arm 2 includes a fan-shaped main body component 21, the shaft sleeve 11 is vertically connected and fixed to one side of the fan core of the main body component 21, the shaft 31 passes through the fan core of the rocker arm 2, and the arc edge of the main body component 21 is at its upper end, and the fan core of the main body component 21 is integrally connected with a connecting arm 22 extending obliquely downward, and the end of the connecting arm 22 is hinged to the upper end of the operating rod 4.

[0034] As a preferred embodiment, Figure 4As shown, the self-locking structure 6 includes a mounting plate 61, a self-locking sleeve 62, an elastic member and a locking ball 63 arranged on one side of the upper end of the fixing plate 3. The mounting plate 61 is located above the main body component 21. The arc edge of the main body component 21 is provided with a fitting opening (indicated by c in the figure) adapted to the locking ball 63 at a position deviating from the midpoint. The self-locking sleeve 62 is installed on the mounting plate 61 through and through, and the elastic member is installed in the self-locking sleeve 62. The locking ball 63 is installed in the port of the self-locking sleeve 62 and is connected to the elastic member. The locking ball 63 is located between the self-locking sleeve 62 and the arc edge of the main body component 21. When the operating shift handle 1 is in the neutral state, the locking ball 63 is embedded in the fitting opening, and the height of the fitting opening is lower than the height of the midpoint of the arc edge of the main body component 21.

[0035] In the above implementation scheme, when the gear is in neutral, the lock ball 63 is tightly embedded in the fitting opening under the elastic force of the elastic member to achieve self-locking. When it is necessary to change gears, the shift handle 1 is pushed forward, the lock ball 63 and the main body 21 move relative to each other, and move along the arc edge of the main body 21 after being squeezed out of the fitting opening. After pushing forward to change gears, the position of the lock ball 63 is higher than the position of the fitting opening. When it is necessary to shift back to neutral, the shift handle 1 is pushed backward, the shift handle 1 and the fan-shaped rocker arm 2 rotate as a whole around the rotating shaft 31, the fan-shaped rocker arm 2 drives the operating rod 4 to move downward, and the operating rod 4 simultaneously drives the shift rocker arm 5 to move the same distance, and finally the predetermined function of driving the shift head to shift back to neutral is achieved through the reverse rotation of the shift rocker arm 5. In the process of shifting back to neutral, because the lock ball 63 returns to the fitting opening from a relatively high section, the spring will release a certain spring force during the movement, which will achieve a certain self-priming effect, thereby playing a certain assisting role and reducing the force of operation. That is to say, when shifting back to neutral, the operation is lighter and more comfortable.

[0036] In this embodiment, the outer surface of the self-locking sleeve 62 is provided with threads, and the mounting plate 61 is penetrated by a threaded hole, and the self-locking sleeve 62 is screwed into the threaded hole.

[0037] The elastic member is a spring.

[0038] In this embodiment, the mounting plate 61 is formed integrally with the fixing plate 3. Specifically, the mounting plate 61 is formed by bending the upper end of the fixing plate 3 by 90 degrees.

[0039] As a preferred embodiment, the lower end of the operating rod 4 is connected to a length adjustment rod 41, and the upper end of the operating shift handle 1 and the lower end of the length adjustment rod 41 are respectively connected to an upper pull fork 42 and a lower pull fork 43, the upper pull fork 42 is movably connected to the rocker arm 2, and the lower pull fork 43 is movably connected to one end of the shift rocker arm 5.

[0040] In the above embodiment, the length of the entire operating rod 4 is adjusted by the length of the length adjustment rod 41, so that the height matching of the entire operating mechanism and the shifting stroke is achieved, and the structural design is simple and reasonable.

[0041] As a preferred embodiment, the length adjustment rod 41 includes a vertically arranged adjustment rod body 411, and the adjustment rod body 411 is provided with a threaded through hole running through it from top to bottom. The lower end of the operating rod 4 is provided with a first threaded section, and the first threaded section is screwed into the upper end of the adjustment rod body 411. A first locking nut 412 is screwed on the first threaded section. The upper end of the pull-down fork 43 is provided with an externally threaded connecting column, and the externally threaded connecting column is threadedly connected to the lower end of the adjustment rod body 411.

[0042] In the above implementation scheme, when adjusting the length of the pull rod assembly (including the operating pull rod 4 and the length adjustment rod 41), loosen the first locking nut 412, and then operate the operating pull rod 4 and the length adjustment rod 41 to rotate relative to each other. After adjustment, tighten the first locking nut 412 so that the first locking nut 412 is abutted against or close to the upper end of the length adjustment rod 41, thereby realizing the length adjustment of the entire pull rod assembly. The structure is simple in design and the operation is relatively convenient and quick.

[0043] In this embodiment, the upper fork 42 and the lower fork 43 are both U-shaped prior art components, and one end of the connecting arm 22 and the shift rocker arm 5 are respectively extended into the U-shaped parts of the upper fork 42 and the lower fork 43, and are movably connected by a pin that passes through horizontally. In this embodiment, the lower end of the upper fork 42 can also be provided with an external threaded connection column, and a threaded hole is provided at the upper end of the operating rod 4 to achieve a threaded connection between the upper fork 42 and the operating rod 4.

[0044] Example 2

[0045] The tractor of this embodiment includes the auxiliary speed change control device in embodiment 1.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] 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.

[0050] 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, without contradiction.

[0051] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A secondary speed change control device, characterized in that: The invention comprises a shift control handle (1), a rocker arm (2), a fixed plate (3) and a control rod (4); the lower end of the shift control handle (1) is rotatably mounted on one side of the fixed plate (3); the rocker arm (2) is fixedly connected to the lower end of the shift control handle (1); the upper end of the control rod (4) is movably connected to the rocker arm (2); the lower end of the control rod (4) is movably connected to one end of a shift rocker arm (5); a self-locking structure (6) adapted to the rocker arm (2) is provided on the fixed plate (3); when the shift control handle (1) is in a neutral state, the self-locking structure (6) is locked with the rocker arm (2); the rocker arm (2) comprises a fan-shaped main body component (21); a connecting arm (22) extending obliquely downward is integrally formed at the fan core of the main body component (21); the end of the connecting arm (22) is connected to the The upper end of the operating rod (4) is hinged; the self-locking structure (6) includes a mounting plate (61) arranged on one side of the upper end of the fixing plate (3), a self-locking sleeve (62), an elastic member and a locking ball (63); the mounting plate (61) is located above the main body component (21); the arc edge of the main body component (21) is provided with an engaging opening adapted to the locking ball (63) at a position deviating from the midpoint; the self-locking sleeve (62) is installed on the mounting plate (61); the elastic member is installed in the self-locking sleeve (62); the locking ball (63) is installed in the port of the self-locking sleeve (62) and is connected to the elastic member; and the locking ball (63) is located between the self-locking sleeve (62) and the arc edge of the main body component (21); when the operating shift handle (1) is in a neutral state, the locking ball (63) is embedded in the engaging opening.

2. A secondary speed change operating device according to claim 1, characterized in that: A horizontal rotating shaft sleeve (11) is fixed to the lower end of the shift control handle (1), a rotating shaft (31) vertically connected and fixed to the fixing plate (3) is passed through the rotating shaft sleeve (11), and the rocker arm (2) is connected and fixed to the rotating shaft sleeve (11).

3. A secondary speed change operating device according to claim 2, characterized in that: The rotating shaft sleeve (11) is vertically connected and fixed to one side of the fan core of the main body component (21); the rotating shaft (31) passes through the fan core of the rocker arm (2), and the arc edge of the main body component (21) is located at its upper end.

4. A secondary speed change operating device according to claim 3, characterized in that: The outer surface of the self-locking sleeve (62) is provided with threads, and a threaded hole is penetrated through the mounting plate (61), and the self-locking sleeve (62) is screwed into the threaded hole.

5. The auxiliary speed change operating device according to claim 3, characterized in that: The elastic member is a spring.

6. A secondary speed change operating device according to claim 3, characterized in that: The mounting plate (61) and the fixing plate (3) are integrally formed.

7. A secondary speed change operating device according to any one of claims 1 to 6, characterized in that: The lower end of the operating pull rod (4) is connected to a length adjustment rod (41), the upper end of the operating shift handle (1) and the lower end of the length adjustment rod (41) are respectively connected to an upper pull fork (42) and a lower pull fork (43), the upper pull fork (42) is movably connected to the rocker arm (2), and the lower pull fork (43) is movably connected to one end of the shift rocker arm (5).

8. A secondary speed change operating device according to claim 7, characterized in that: The length adjustment rod (41) comprises a vertically arranged adjustment rod body (411), wherein the adjustment rod body (411) is provided with a threaded through hole running through it from top to bottom, the lower end of the operating pull rod (4) is provided with a first threaded section, the first threaded section is screwed into the upper end of the adjustment rod body (411), a first locking nut (412) is screwed into the first threaded section, and the upper end of the pull-down fork (43) is provided with an externally threaded connecting column, and the externally threaded connecting column is threadedly connected to the lower end of the adjustment rod body (411).

9. A tractor, characterized in that: It comprises the auxiliary speed change operating device as claimed in any one of claims 1 to 8.

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