Knob pull rod type shuttle gear shifting control mechanism

Abstract

The utility model provides a knob pull rod type shuttle gear shifting control mechanism which comprises a rack, a rotating shaft and a gear shifting pull rod, the rotating shaft is rotationally connected with the rack and can rotate around the axis of the rotating shaft, a handle is arranged at the upper end of the rotating shaft, a swing arm is arranged at the lower end of the rotating shaft, one end of the gear shifting pull rod is hinged to the swing arm, and the other end of the gear shifting pull rod is hinged to the rack. The other end of the gear shifting pull rod can be used for being connected with a gear shifting rocker arm of a gearbox. By the adoption of the shuttle type gear gearbox, the push-pull action of an operator on the handle is transmitted to the swing arm through rotation of the rotating shaft, the swing arm swings to drive the gear shifting pull rod to move front and back, and gear shifting operation of the shuttle type gear gearbox is achieved; the rotating shaft does not reciprocate back and forth, so that a sliding groove does not need to be formed in the instrument desk, the occupied space of the instrument desk is small, and diversified arrangement of an instrument desk switch is facilitated; in addition, resetting of an elastic component is not needed, the gear sliding condition is avoided, the gear shifting pause feeling is good, and the reliability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shuttle-type gear shift operating mechanisms for tractors, in particular to a rotary-twist pull-rod shuttle-type gear shift operating mechanism. Background Art

[0002] Currently, most tractor shuttle shift mechanisms on the market use a push-pull cable-type structure. This involves a lever hinged to the instrument panel frame, allowing it to be pushed and pulled forward and backward. A rocker arm extends from the lower end of the lever, connecting it to a cable, which in turn connects to the gearshift arm of the transmission. This structure requires a chute on the instrument panel for the lever's forward and backward movement, which takes up significant space and makes it unsuitable for diverse switch arrangements. Furthermore, during reset, the lever's return motion cannot be transmitted to the cable, requiring a spring to reset the cable, resulting in poor reliability. Utility Model Content

[0003] The technical problem to be solved by the utility model is: how to reduce the space occupied by the gear shifting operating mechanism on the instrument panel.

[0004] The technical solution of the utility model to solve the above technical problems is as follows:

[0005] The utility model provides a rotary pull rod shuttle shift operating mechanism, which includes a frame, a rotating shaft, and a shift pull rod. The rotating shaft is rotatably connected to the frame and can rotate around its own axis. A handle is provided at the upper end of the rotating shaft, and a swing arm is provided at the lower end of the rotating shaft. One end of the shift pull rod is hinged to the swing arm, and the other end of the shift pull rod can be used to connect to the shift rocker arm of the gearbox.

[0006] The beneficial effects of the utility model are:

[0007] With the present invention, the operator's pushing and pulling action on the handle is transmitted to the swing arm through the rotation of the rotating shaft. The swing of the swing arm can drive the shift rod to move back and forth, thereby realizing the shifting operation of the shuttle-type gearbox; there is no back and forth reciprocating motion of the rotating shaft, so there is no need to set a slide groove on the instrument panel, which occupies a small space on the instrument panel and is convenient for adapting to the diversified arrangement of the instrument panel switches; in addition, the front and rear shifting movements are all realized by transmitting the operator's pushing and pulling action on the handle, and there is no need to reset the elastic component, which avoids slipping, improves the shifting feeling, and improves reliability.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, a dashboard is provided on one side of the frame, and the rotating shaft passes through the dashboard.

[0010] The upper end of the rotating shaft extends to the upper surface of the instrument panel, is easy to operate, and is suitable for small horsepower tractors.

[0011] Furthermore, an end cover is provided on the upper side of the instrument panel, and the end cover is sleeved on the upper part of the rotating shaft.

[0012] It is convenient to close the upper side of the instrument panel to prevent foreign objects from falling into the instrument panel along the rotating shaft.

[0013] Furthermore, a mounting bracket is provided on one side of the frame, and the rotating shaft is arranged at an angle and is rotatably connected to the mounting bracket.

[0014] The handle structure at the upper end of the rotating shaft is conveniently moved away from the instrument panel and closer to the driver, making operation easy.

[0015] Furthermore, the mounting bracket is U-shaped, the open side of the mounting bracket is fixed on the frame, and a sleeve is provided in the mounting bracket, and the sleeve is sleeved on the rotating shaft.

[0016] The sleeve can well constrain the rotating shaft so that the rotating shaft can only rotate, and the transmission stability is good.

[0017] Furthermore, a mounting plate is provided on the open side of the mounting bracket, and the mounting plate is connected to the frame by bolts.

[0018] Easy to assemble and disassemble, good stability.

[0019] Furthermore, a limiting groove is provided at the lower portion of the frame, and the lower end of the rotating shaft contacts the bottom of the limiting groove.

[0020] The bottom of the limit groove is used to support the rotating shaft to prevent it from sliding down, and the stability is good; at the same time, the two sides of the limit groove can also limit the swing arm to prevent the swing arm from excessive movement causing collision with the gear shift mechanism of the transmission.

[0021] Furthermore, limiting plates are provided on both sides of the limiting groove, the limiting plates and the swing arm extend in the same direction, and the height of the limiting plates is the same as the height of the swing arm.

[0022] It is convenient to limit the maximum movement range of the swing arm to avoid collision of the gear shift mechanism of the transmission caused by excessive movement of the swing arm.

[0023] Furthermore, a U-shaped connecting fork is provided at the other end of the shift rod, and the shift rocker arm is located at the opening portion of the connecting fork and is hinged to the connecting fork.

[0024] The connection is convenient and the strength is high; the hinged structure can offset the rotation of the shift rocker arm relative to the connecting fork to avoid structural interference.

[0025] Furthermore, a pin is provided at the opening portion of the connecting fork, one end of the pin passes through the connecting fork and the shift rocker arm and is provided with a cotter pin.

[0026] The connection is easy, the cotter pin can prevent the pin shaft from falling off, and the reliability is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of the present utility model.

[0028] Figure 2 This is a structural diagram of the utility model with the instrument panel removed.

[0029] In the accompanying drawings, the technical features represented by the reference numerals are as follows:

[0030] 1-frame; 2-instrument panel; 3-rotating shaft; 4-handle; 5-swing arm; 6-shift lever; 7-shift rocker arm; 8-end cover; 9-mounting bracket; 10-sleeve; 11-mounting plate; 12-limiting groove; 13-limiting plate; 14-connecting fork; 15-pin shaft; 16-cotter pin. DETAILED DESCRIPTION

[0031] 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.

[0032] This utility model refers to Figure 1-2 .

[0033] The utility model provides a rotary pull rod shuttle shift operating mechanism, comprising a frame 1, a rotating shaft 3, and a shift pull rod 6. The rotating shaft 3 is rotatably connected to the frame 1 and can rotate around its own axis. A handle 4 is provided at the upper end of the rotating shaft 3, and a swing arm 5 is provided at the lower end of the rotating shaft 3. One end of the shift pull rod 6 is hinged to the swing arm 5, and the other end of the shift pull rod 6 can be used to connect to a shift rocker arm 7 of a gearbox.

[0034] principle:

[0035] The gear shifting structure of the gearbox is an original setting on the tractor and belongs to the prior art. Gear shifting can be achieved by pushing or pulling the gear shift rocker arm 7. The purpose of this utility model is to provide the operating movement of pushing and pulling the gear shift rocker arm 7. The gear shifting structure in the gearbox has nothing to do with the technical problem of this utility model.

[0036] When shifting gears, the shift rod 6 is connected to the shift rocker arm 7 of the gearbox. The operator holds the handle 4 and swings it, driving the rotating shaft 3 to rotate. The rotating shaft 3 drives the swing arm 5 to swing back and forth. The hinged structure of the swing arm 5 and the shift rod 6 can offset the rotation amount, and only the back and forth movement of the swing arm 5 is transmitted to the shift rod 6, so that the shift rod 6 can push and pull the shift rocker arm 7 of the gearbox to swing.

[0037] Note: The three handles 4 in the figure represent the front, middle and rear positions of the handle 4 in different gears. The actual number of handle 4 is 1.

[0038] With the present invention, the operator's push-pull action on the handle 4 is transmitted to the swing arm 5 through the rotation of the rotating shaft 3. The swing of the swing arm 5 can drive the shift rod 6 to move back and forth, thereby realizing the shifting operation of the shuttle gear transmission; the rotating shaft 3 does not have back and forth reciprocating motion, so there is no need to set a slide groove on the instrument panel 2, which occupies a small space on the instrument panel 2 and is convenient for adapting to the diversified layout of the switches on the instrument panel 2; in addition, the front and rear shifting movements are all achieved by transmitting the operator's push-pull action on the handle 4, without the need for elastic component reset, avoiding slippage, and providing a good shifting feeling, thereby improving reliability.

[0039] Furthermore, a dashboard 2 is provided on one side of the frame 1 , and the rotating shaft 3 passes through the dashboard 2 .

[0040] The upper end of the rotating shaft 3 extends to the upper surface of the instrument panel 2, which is easy to operate and suitable for small horsepower tractors.

[0041] Furthermore, an end cover 8 is provided on the upper side of the instrument panel 2 , and the end cover 8 is sleeved on the upper part of the rotating shaft 3 .

[0042] It is convenient to close the upper side of the instrument panel 2 to prevent foreign matter from falling into the instrument panel 2 along the rotating shaft 3.

[0043] Furthermore, a mounting bracket 9 is provided on one side of the frame 1 , and the rotating shaft 3 is arranged at an angle and is rotatably connected to the mounting bracket 9 .

[0044] The handle 4 at the upper end of the rotating shaft 3 is conveniently moved away from the instrument panel and closer to the driver, making operation easy.

[0045] Furthermore, the mounting bracket 9 is U-shaped, and the open side of the mounting bracket 9 is fixed to the frame 1 . A sleeve 10 is provided in the mounting bracket 9 , and the sleeve 10 is sleeved on the rotating shaft 3 .

[0046] The sleeve 10 can well constrain the rotating shaft 3 so that the rotating shaft 3 can only rotate, and the transmission stability is good.

[0047] Furthermore, a mounting plate 11 is provided on the open side of the mounting bracket 9 , and the mounting plate 11 is connected to the frame 1 via bolts.

[0048] Easy to assemble and disassemble, good stability.

[0049] Furthermore, a limiting groove 12 is provided at the lower portion of the frame 1 , and the lower end of the rotating shaft 3 contacts the bottom of the limiting groove 12 .

[0050] The bottom of the limiting groove 12 is used to support the rotating shaft 3 to prevent the rotating shaft 3 from sliding down, and the stability is good; at the same time, the two sides of the limiting groove 12 can also limit the swing arm 5 to prevent the swing arm 5 from excessive movement causing the gear shift mechanism of the gearbox to collide.

[0051] Furthermore, limiting plates 13 are provided on both sides of the limiting groove 12 . The limiting plates 13 and the swing arm 5 extend in the same direction, and the height of the limiting plates 13 is the same as that of the swing arm 5 .

[0052] This is convenient for limiting the maximum range of motion of the swing arm 5 and preventing the swing arm 5 from over-moving and causing the shift mechanism of the gearbox to collide.

[0053] Furthermore, a U-shaped connecting fork 14 is provided at the other end of the shift rod 6 , and the shift rocker arm 7 is located at the opening of the connecting fork 14 and is hinged to the connecting fork 14 .

[0054] The connection is convenient and the strength is high; the hinged structure can offset the rotation of the shift rocker arm 7 relative to the connecting fork 14, avoiding structural interference.

[0055] Furthermore, a pin shaft 15 is provided at the opening portion of the connecting fork 14 , and one end of the pin shaft 15 passes through the connecting fork 14 and the shift rocker arm 7 and is provided with a cotter pin 16 .

[0056] The connection is convenient, the cotter pin 16 can prevent the pin shaft 15 from falling off, and the reliability is good.

[0057] In the description of the present invention, it should be understood that if there are descriptive terms indicating orientation, direction or positional relationship, such as: "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated in this specification is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of understanding the present invention and simplifying the description, and does not indicate or imply that the referred part, element or whole must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0058] In addition, if there are order description terms, such as "first", "second", etc., their use in this specification is to facilitate understanding or simplify the description. For example, in order to distinguish multiple technical features with the same type or function, but they have to be mentioned separately, this specification may use prefix or suffix order description terms to distinguish them. Therefore, it cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of such features. In the description of this utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0059] In the present invention, if terms describing the relative functional relationship of structures are used, such as "install", "connect", "connect", "fix", etc., they should be understood in a broad sense unless otherwise clearly specified and limited. For example, "install", "connect", "connect", etc. can be fixed connections, detachable connections, or integrated; can be mechanical connections or electrical connections; can be direct connections or indirect connections through an intermediate medium, can be internal connections between two elements or interactive relationships between two elements; "fix" can be fixed to form an integral body, or can be detachably fixed through fasteners; can be directly fixed or fixed through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above-mentioned descriptive terms in the present invention can be understood according to the specific circumstances, the context, the coherence of the preceding and following texts, etc.

[0060] In this utility model, if descriptive terms with ancillary or connecting meaning appear, for example, a first feature being "on" or "below" a second feature, these should not be interpreted as limiting unless otherwise expressly specified or limited. For example, "on" or "below" may refer to direct contact between the first and second features, or indirect contact between the first and second features through an intermediary. Those skilled in the art will understand the specific meanings of these descriptive terms in this utility model based on the specific circumstances, context, and coherence of the preceding and following texts.

[0061] Furthermore, when a first feature is “above,” “above,” or “above” a second feature, it 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. When a first feature is “below,” “below,” or “below” a second feature, it 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.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments, examples and features of different embodiments and examples described in this specification, unless there is any contradiction, and these combinations or combinations should all fall within the scope summarized by the present invention.

[0063] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are illustrative and cannot be understood as limiting the present invention. Changes, modifications, substitutions and variations of the above embodiments made by ordinary technicians in the field within the scope of information available from public channels and in combination with the technical inspiration given by the application documents are still within the scope of protection of the present application.

Claims

1. A rotary pull rod shuttle shift mechanism, characterized by: The invention comprises a frame (1), a rotating shaft (3), and a shift lever (6); the rotating shaft (3) is rotatably connected to the frame (1) and can rotate around its own axis; a handle (4) is provided at the upper end of the rotating shaft (3); a swing arm (5) is provided at the lower end of the rotating shaft (3); one end of the shift lever (6) is hinged to the swing arm (5), and the other end of the shift lever (6) can be used to connect to a shift rocker arm (7) of a transmission.

2. The rotary pull rod shuttle shift mechanism according to claim 1, characterized in that: An instrument panel (2) is also provided on one side of the frame (1), and the rotating shaft (3) passes through the instrument panel (2).

3. The rotary pull rod shuttle shift mechanism according to claim 2, characterized in that: An end cover (8) is also provided on the upper side of the instrument panel (2), and the end cover (8) is sleeved on the upper part of the rotating shaft (3).

4. The rotary pull rod shuttle shift mechanism according to claim 1, characterized in that: A mounting bracket (9) is also provided on one side of the frame (1), and the rotating shaft (3) is arranged obliquely and is rotatably connected to the mounting bracket (9).

5. The rotary pull rod shuttle shift mechanism according to claim 4, characterized in that: The mounting bracket (9) is U-shaped, and the open side of the mounting bracket (9) is fixed on the frame (1). A sleeve (10) is provided in the mounting bracket (9), and the sleeve (10) is sleeved on the rotating shaft (3).

6. The rotary pull rod shuttle shift mechanism according to claim 5, characterized in that: A mounting plate (11) is provided on the open side of the mounting bracket (9), and the mounting plate (11) is connected to the frame (1) via bolts.

7. The rotary pull rod shuttle shift mechanism according to claim 5, characterized in that: The lower portion of the frame (1) is further provided with a limiting groove (12), and the lower end of the rotating shaft (3) contacts the bottom of the limiting groove (12).

8. The rotary pull rod shuttle shift mechanism according to claim 7, characterized in that: Limiting plates (13) are further provided on both sides of the limiting groove (12), the limiting plates (13) and the swing arm (5) extend in the same direction, and the height of the limiting plates (13) is the same as that of the swing arm (5).

9. The rotary pull rod shuttle shift mechanism according to claim 1, characterized in that: The other end of the shift rod (6) is provided with a U-shaped connecting fork (14), and the shift rocker arm (7) is located at the opening of the connecting fork (14) and is hinged to the connecting fork (14).

10. The rotary pull rod shuttle shift mechanism according to claim 9, characterized in that: A pin shaft (15) is provided at the opening portion of the connecting fork (14), one end of the pin shaft (15) passes through the connecting fork (14) and the shift rocker arm (7) and is provided with a cotter pin (16).

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