Gearbox gear shifting execution operation structure of agricultural machine and agricultural machine

Abstract

The agricultural machinery gearbox gear shifting execution operation structure comprises a gearbox body, a gear shifting operation rod used for conducting gear shifting operation on a gear shifting fork on a transmission shaft in the gearbox body is arranged in the gearbox body, and a gear engaging execution block is fixed to the far end of the gear shifting operation rod. A gear shifting operation shaft is fixed to the gear shifting execution block in the direction parallel to the length direction of the transmission shaft, the gear shifting operation shaft slides and rotates on the gearbox body, a rotating column which is arranged on the gearbox body in a penetrating mode and rotationally connected with the gearbox body is arranged above the gear shifting execution block, and a gear shifting execution rod is arranged between the rotating column and the gear shifting execution block. The gear shifting control device is independently arranged, rotation of the rotating column is controlled, the gear shifting execution rod shifts the gear shifting execution block in the direction parallel to the transmission shaft, the gear shifting control device controls the gear shifting execution block to rotate around the gear shifting operation shaft, and then gear selection and gear meshing are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, in particular to an agricultural machinery gearbox shift execution operation structure and agricultural machinery equipment. Background Art

[0002] Agricultural machinery refers to various machines used in the production process of crop planting and animal husbandry, as well as in the primary processing and treatment of agricultural and animal products. Agricultural machinery includes agricultural power machinery, farmland construction machinery, soil tillage machinery, planting and fertilization machinery, plant protection machinery, farmland irrigation and drainage machinery, crop harvesting machinery, agricultural product processing machinery, animal husbandry machinery and agricultural transport machinery.

[0003] The power used in agricultural machinery can be divided into two parts: one part is used for the walking or movement of agricultural machinery, such as tractor traction and self-propelled power; the other part is used to drive the working parts of agricultural machinery. The device used for walking or moving in agricultural machinery includes a power output device and a gearbox structure. The speed control of the walking or moving device is achieved through the gear shifting operation of the gearbox. In the traditional gearbox structure, the shift handle on the gearbox is directly installed on the top of the gearbox. By shaking the shift handle back and forth, the shift handle can be cut into different shift forks to achieve the shift operation; by shaking the shift handle left and right, the shift handle can push the shift fork to translate so that the corresponding gear set engages and the gear operation is achieved. However, this situation has great limitations on the installation position of the gearbox. The gearbox must be located close to the operator, and the operator's seating position can only be set around or on the top of the gearbox, thereby increasing the length, width or height of the entire machine and affecting the passability of the entire machine. If the position layout of the gearbox is unreasonable, it will lead to an inappropriate center of gravity of the entire machine, thereby affecting the controllability and work efficiency of the entire machine. In general, operators usually operate the equipment at the rear of agricultural machinery, and the position of the gearbox is coordinated with the positions of other devices and components in the agricultural machinery. If the gearbox is located far away from the operator's position, it will be inconvenient for the operator to shift gears. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is: how to provide an agricultural machinery gearbox shifting execution operation structure that is convenient for gearbox shifting operations and can improve the flexibility of gearbox layout.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A gear shift execution operation structure for an agricultural machinery gearbox, comprising a gearbox case body mounted on the agricultural machinery equipment, a gear shift operation lever for performing a gear shift operation on a gear shift fork on a transmission shaft in the gearbox case body is arranged in the gearbox case body, a gear engaging execution block is fixedly connected to one end of the gear shift operation lever away from the gear shift fork, a gear engaging execution block is fixedly connected to a gear shift operation shaft parallel to the transmission shaft in the gearbox case body, two ends of the gear shift operation shaft respectively pass through the gearbox case body on the side where the gear shift operation shaft is located and extend out of the gearbox case body, the gear shift operation shaft can be connected to the gearbox case body rotatably around its axial direction, and when the gear engaging execution block and the gear shift operation lever rotate in different directions with the gear shift operation shaft, the gear shift operation can be realized through the gear shift operation lever;

[0007] A rotating column passing through the gearbox case is vertically arranged on the gearbox case and located above the gear-engaging actuating block. The rotating column is rotatably connected to the gearbox case. A gear-engaging inner arm is fixedly connected to the column body of the rotating column located in the gearbox case. Two gear-engaging paddles are fixedly connected to the top of the gear-engaging actuating block along the axial interval parallel to the gear-shifting operating shaft. A gear-engaging actuating rod extending between the two gear-engaging paddles is fixedly connected to the gear-engaging inner arm. When the rotating column rotates in different directions around its axial direction, the rotating column can act on the inner side of the gear-engaging paddle at the corresponding end through the bottom end of the gear-engaging actuating rod, so as to push the gear-engaging actuating block to move along the axial corresponding end of the gear-shifting operating shaft, so that the gear-shifting operating rod can realize the gear-engaging operation.

[0008] The agricultural machinery gearbox shift execution operation structure also includes a gear shift control device, which is connected to the gear shift operation shaft at either end of which is located outside the gearbox housing through a gear shift transmission device, and can drive the gear shift operation shaft to rotate to achieve gear shifting operations. The gear shift control device is connected to the column body of the rotating column located outside the gearbox housing through a gear shift transmission device, and can drive the rotating column to rotate to achieve gear shifting operations.

[0009] By setting up a gearbox housing and a shift control device that are separated from each other, different layout settings of the operator position and the gearbox position can be achieved. In combination with specific agricultural machinery, the installation position of the gearbox can be set in accordance with the positions of the remaining equipment components, which effectively utilizes the installation space and makes the layout between the various equipment more flexible. In a specific shift operation, the shift operating lever can be controlled to rotate forward or backward around the shift operating shaft by controlling the rotation direction of the shift transmission device. Compared with the existing traditional gearbox structure, the shift handle is shaken forward and backward, so that the shift operating lever selects different shift forks and then selects different transmission shafts. By controlling the rotation direction of the rotating column through the gear shift transmission device, the gear shift actuator rod can be used to abut against different gear shift paddles, pushing the gear shift actuator block to move in the corresponding direction along the center line of the gear shift operating shaft; in the process of lateral movement of the gear shift actuator block, the gear shift fork is pushed to move in the corresponding direction through the gear shift operating rod, so that different gear sets on the transmission shaft are engaged to transmit power; relative to the existing transmission gearbox structure, this means that the gear shift handle is shaken left and right to make the transmission gear sets engage in different gear positions.

[0010] As an optimization, a mounting hole is formed on the upper side of the gear-engaging inner arm in parallel to the centerline of the rotating column, and the end of the gear-engaging actuator rod away from the gear-engaging paddle passes through the mounting hole in the centerline of the mounting hole, and the rod body of the gear-engaging actuator rod at both ends of the mounting hole is threadedly matched with locking nuts respectively pressed against the gear-engaging inner arm to fix the gear-engaging actuator rod on the gear-engaging inner arm. The gear-engaging actuator rod can be disassembled, which is convenient for disassembly and maintenance of the gearbox.

[0011] As an optimization, the gear-engaging execution block is provided with a connecting bolt that passes through the gear-shifting operating shaft and is threadedly connected to the gear-shifting operating rod, so that the gear-shifting operating shaft and the gear-shifting operating rod are fastened to the gear-engaging execution block. It is also convenient to disassemble the gear-shifting operating rod and the gear-shifting operating shaft.

[0012] As an optimization, the shift control device includes a control base fixedly connected to the agricultural machinery equipment, two shift shaft support seats are arranged at intervals in the horizontal direction on the top of the control base, and shift shafts respectively fixedly connected to the two shift shaft support seats are arranged along their relative directions, a shift sleeve is sleeved on the shift shaft for rotationally matching with the shift shaft, a select sleeve is fixedly connected to the upper tube body of the shift sleeve, the centerline direction of the shift sleeve is perpendicular to the centerline direction of the select sleeve, a select shaft rotationally matching with the select sleeve is passed through the select sleeve, a shift rod is arranged above the select sleeve, the axial direction of the shift rod is perpendicular to the axial direction of the select shaft, a shift rod seat is fixedly connected to the lower end of the shift rod, and a protrusion on the shift rod seat is formed with connecting arms respectively fixedly connected to the two ends of the select shaft located outside the select sleeve;

[0013] A shift swing arm is formed on the lower tube body of the shift sleeve, and the shift swing arm extends in a direction perpendicular to the center line of the shift sleeve. A swing hole is penetrated on the control base at a position corresponding to the shift swing arm, and the shift swing arm passes through the swing hole and extends below the control base. When the shift sleeve rotates, the shift swing arm can swing in the swing hole. A gear engaging outer arm is fixedly connected to the column body at one end of the rotating column located outside the gearbox casing. The gear engaging transmission device includes a shift cable, one end of the shift cable is hingedly connected to the shift swing arm, and the other end is hingedly connected to the gear engaging outer arm. When the shift sleeve rotates in different directions around the shift shaft, the shift swing arm can push or pull the gear engaging outer arm through the shift cable to make the rotating column rotate in different directions. A gear selecting rocker arm is fixedly connected to the shift rod seat. The gear shifting mechanism is a kind of gear shifting mechanism, and its one end is hinged on the gear selection rocker arm, and its other end is fixedly connected with a return spring. The other end of the return spring is hung on the gear selection outer arm, and the gear selection outer arm is also fixedly connected with a reset spring. The other end of the reset spring is fixedly connected to the agricultural machinery equipment. When the reset spring is in a natural state, the gear shifting lever corresponds to one of the gear shift forks. When the gear shifting lever seat rotates toward one side around the gear selection shaft, the gear selection rocker arm can pull the gear selection outer arm through the gear selection wire to rotate the gear shifting lever, switch the gear shifting lever to the other gear shift fork, and make the gear selection outer arm stretch the reset spring.

[0014] The shift cable and the gear selection cable are both made of materials with a certain rigidity. When the shift lever rotates around the center line of the shift shaft (rocking back and forth), the relative shift swing arm can also swing back and forth, which can pull the shift cable backward or push the shift cable forward. The other end of the shift cable acts on the gear outer arm, which can pull or push the gear outer arm accordingly, so that the rotating column rotates in a clockwise or counterclockwise direction. Under normal conditions, the shift operating lever always maintains a corresponding relationship with one of the shift forks. Only when the shift lever rotates toward one side around the center line of the gear selection shaft, the gear selection rocker arm can also rotate around the gear selection shaft, and the gear selection rocker arm pulls the gear selection cable, so that the gear selection outer arm connected to the other end of the gear selection cable rotates, and then the shift operating shaft rotates and switches to another shift fork. When the gear selection outer arm rotates, the reset spring will be stretched at the same time, so that the reset spring can provide spring force for the gear selection outer arm to rotate and switch the shift operating lever back to the original shift fork to achieve reset. During the rotation of the gear selector outer arm, the stretching of the return spring will generate a pulling force on the gear selector cable, which may easily cause the gear selector cable to break over a long period of time. Therefore, a return spring is added between the gear selector cable and the gear selector outer arm to convert this pulling force into a deformation force on the return spring, thereby reducing damage to the gear selector cable. When in use, in order to be able to pull the gear selector outer arm to rotate through the return spring, the stiffness of the return spring is greater than that of the return spring.

[0015] As an optimization, the end of the shift operating shaft located outside the gearbox housing is sleeved with a sleeve that slidably cooperates with it, and the sleeve is provided with at least one strip-shaped clamping hole extending toward the other end in parallel with the axial direction of the sleeve at the end where the shift operating shaft is inserted, and a twist handle extending in the radial direction of the shift operating shaft is fixedly connected to the position corresponding to the strip clamping hole on the rod body of the shift operating shaft, and the twist handle passes through the strip clamping hole and can slide with it along the strip clamping hole, and an end cover is fixedly connected to the end of the sleeve away from the strip clamping hole, and a rotating shaft arranged on the same center line as the sleeve is fixedly connected to the end cover, and a rotating sleeve arranged on the same center line as the sleeve and detachably connected is sleeved on the rotating shaft, and the gear selection outer arm is fixedly connected to the rotating sleeve and extends in the radial direction of the rotating sleeve. It is convenient for installation and disassembly, and easy for maintenance.

[0016] The utility model also discloses an agricultural machinery device, comprising the above-mentioned agricultural machinery gearbox shift execution operation structure.

[0017] Compared with the prior art, the utility model has the following beneficial effects: the utility model is provided with an independent gearbox and a gear shift control device, so that the layout of the gearbox can be more flexible, and the gear shift control device can also be adjusted according to the position of the operator for easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a structural schematic diagram of the shift operating lever in the utility model operating the shift fork;

[0019] Figure 2 It is a structural schematic diagram of the shift control device in the utility model. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0021] It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In the description of the utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when used, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", etc. do not mean that the components are absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected 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.

[0022] like Figure 1 and Figure 2 As shown, the agricultural machinery gearbox shifting execution operation structure in this specific embodiment includes a gearbox case installed on the agricultural machinery equipment, two parallel transmission shafts 1 are arranged in the gearbox case, and the transmission shafts 1 are all fixedly connected with shift forks 2, and a shift operating rod 3 for performing shifting operations on each shift fork 2 is arranged in the gearbox case, and the end of the shift operating rod 3 away from the shift fork 2 is fixedly connected with a gear execution block 4, and the gear execution block 4 is fixedly connected with a shift operating shaft 5 parallel to the transmission shaft 1 in the gearbox case, and the two ends of the shift operating shaft 5 respectively pass through the gearbox case on the side thereof and extend out of the gearbox case, and the shift operating shaft 5 rotates and can be slidably connected to the gearbox case along its axial direction, and when the gear execution block 4 and the shift operating rod 3 rotate in different directions with the shift operating shaft 5, the shifting operation can be realized by the shift operating rod 3;

[0023] A rotating column 6 passing through the gearbox housing is vertically arranged on the gearbox housing and located above the gear-engaging execution block 4. The rotating column 6 is rotatably connected to the gearbox housing. A gear-engaging inner arm 7 is fixedly connected to the column body of the rotating column 6 located in the gearbox housing. Two gear-engaging paddles 8 are fixedly connected to the top of the gear-engaging execution block 4 at intervals parallel to the axial direction of the gear-shifting operating shaft 5. A gear-engaging execution rod 9 extending between the two gear-engaging paddles 8 is fixedly connected to the gear-engaging inner arm 7. When the rotating column 6 rotates around its axial direction in different directions, the rotating column 6 can act on the inner side of the gear-engaging paddle 8 at the corresponding end through the bottom end of the gear-engaging execution rod 9, so as to push the gear-engaging execution block 4, the gear-shifting operating rod 3 and the gear-shifting operating shaft 5 to move along the axial corresponding end of the gear-shifting operating shaft 5, so that the gear-shifting operating rod 3 can realize the gear-engaging operation.

[0024] The agricultural machinery gearbox shift execution operation structure also includes a gear shift control device, which is connected to the gear shift operating shaft 5 at either end of the gear shift operating shaft 5 located outside the gearbox housing through a gear shift transmission device, and can drive the gear shift operating shaft to rotate to achieve gear shifting operations. The gear shift control device is connected to the rotating column 6 located outside the gearbox housing through a gear shift transmission device, and can drive the rotating column 6 to rotate to achieve gear shifting operations.

[0025] In this specific embodiment, the gear engaging inner arm 7 is welded and fixedly connected to the gear engaging actuator rod 9; when the quantity is large, it can be cast as one piece in an open mold; it can also be a detachable connection, for example, the gear engaging inner arm 7 is provided with a mounting hole along a direction parallel to the center line of the rotating column 6, and the end of the gear engaging actuator rod 9 away from the gear engaging paddle 8 passes through the mounting hole along the center line direction of the mounting hole, and the gear engaging actuator rod 9 is located at both ends of the mounting hole. The rod body is threadedly fitted with locking nuts that are respectively pressed against the gear engaging inner arm 7 to fix the gear engaging actuator rod 9 on the gear engaging inner arm 7.

[0026] The shift operating rod 3 can be welded and fixedly connected below the gear engaging execution block 4, and the shift operating shaft 5 passes through the gear engaging execution block 4 and is fastened and connected. In this specific embodiment, after the shift operating shaft 5 passes through the gear engaging execution block 4, the gear engaging execution block 4 is provided with a connecting bolt that passes through the shift operating shaft 5 and is threadedly connected to the shift operating rod 3, so that the shift operating shaft 5 and the shift operating rod 3 are fastened to the gear engaging execution block 4.

[0027] In this specific embodiment, the shift control device includes a control base 10 fixedly connected to the agricultural machinery equipment, two shift shaft support seats 11 are arranged at intervals in the horizontal direction on the top of the control base 10, and shift shafts fixedly connected to the two shift shaft support seats 11 are arranged between the two shift shaft support seats 11 along their relative directions, and a shift shaft is sleeved with a shift sleeve 12 that is rotatably matched with the shift shaft, and a select sleeve 13 is fixedly connected to the upper tube body of the shift sleeve 12, and the centerline direction of the shift sleeve 12 is perpendicular to the centerline direction of the select sleeve 13, and a select shaft that is rotatably matched with the shift sleeve 13 is passed through the select sleeve 13, and a shift rod 14 is arranged above the select shaft, and the axial direction of the shift rod 14 is perpendicular to the axial direction of the select shaft, and the lower end of the shift rod 14 is fixedly connected to a shift rod seat 15, and the shift rod seat 15 is formed with protrusions to form connecting arms that are fixedly connected to the two ends of the select shaft located outside the select sleeve 13;

[0028] A shift swing arm 16 is formed on the lower tube body of the shift sleeve 12, and the shift swing arm 16 is extended in a direction perpendicular to the center line of the shift sleeve 12. A swing hole is penetrated at a position corresponding to the shift swing arm 16 on the control base 10, and the shift swing arm 16 passes through the swing hole and extends below the control base 10. When the shift sleeve 12 rotates, the shift swing arm 16 can swing in the swing hole. The rotating column 6 is located at one end of the gearbox housing and is fixedly connected to a gear-engaging outer arm 17. The gear-engaging transmission device includes a shift Cable 18, one end of the shift cable 18 is hinged to the shift swing arm 16, and the other end is hinged to the gear engaging outer arm 17. When the operator operates the shift lever 14 to swing back and forth, the shift sleeve 12 rotates in different directions around the shift shaft, and the shift swing arm 16 can push or pull the gear engaging outer arm 17 through the shift cable 18 to make the rotating column 6 rotate in different directions (as a prior art, the shift cable 18 has a certain rigidity and is partially confined in the channel tube to prevent its deformation), thereby realizing the gear engaging action.

[0029] A gear selection rocker arm 19 is fixedly connected to the gear shift lever seat 15, and the gear selection rocker arm 19 is horizontally extended in a direction perpendicular to the center line of the gear selection sleeve 13. One end of the gear shift operating shaft 5 located outside the gearbox housing is synchronously rotatably connected to a gear selection outer arm 20. The gear shift transmission device includes a gear selection cable 21, one end of the gear selection cable 21 is hingedly connected to the free end of the gear selection rocker arm 19, and the other end is fixedly connected to a return spring, and the other end of the return spring is hung on the gear selection outer arm 20. A return spring 22 is also connected to the gear selection outer arm 20, and the other end of the return spring 22 is connected to the agricultural machinery equipment. When the return spring 22 is in a natural state, the gear shift operating rod 3 corresponds to one of the shift forks 2. When the operator controls the gear shift lever 14 to swing left and right, specifically to the Figure 2 The gear shift lever 14 is swung to the left, the gear shift lever seat 15 rotates toward one side around the gear selection shaft, the free end of the gear selection rocker arm 19 rises, and the gear selection outer arm 20 can be pulled by the gear selection cable 21 to rotate the gear shift operating shaft 5, and the gear shift operating lever 3 is switched to the other gear shift fork 2 to achieve the gear shifting action. At the same time, the gear selection outer arm 20 stretches the return spring 22 to facilitate the rotation of the gear shift operating shaft 5; when the operator manipulates the gear shift lever 14 to Figure 2 When the gear selector swings to the right, the free end of the gear selector rocker arm 19 is lowered, and under the action of the return spring 22, the gear selector outer arm 20 drives the shift operating shaft 5 to rotate and switch back to the original gear position, and the gear selector cable 21 remains in a tensioned state.

[0030] It can be understood that after the shifting action of the shift lever 14 swinging left and right, the aforementioned gear engaging action of the shift lever 14 swinging back and forth is connected to realize the entire gear switching operation. During the shifting process of the shift operating shaft 5 rotating, the gear engaging execution block 4 rotates accordingly, and the bottom end of the gear engaging execution rod 9 is always located between the two gear engaging paddles 8 on the gear engaging execution block 4 and will not fall out. Similarly, during the gear engaging process of the rotating column 6 rotating and the bottom end of the gear engaging execution rod 9 abutting against the driving gear engaging paddle 8, the bottom end of the gear engaging execution rod 9 is also always located between the two gear engaging paddles 8 and will not fall out; when the shift operating rod 3 moves with the gear engaging paddle 8, it also abuts against the fork claw at the corresponding end on the driving shift fork 2. The shift fork 2 is a prior art, and the specific structure will not be described in detail here.

[0031] In this specific embodiment, the end of the shift operating shaft 5 located outside the gearbox housing is sleeved with a sleeve 23 that slides with it. The sleeve 23 is located at the end where the shift operating shaft 5 is inserted and has at least one strip-shaped clamping hole extending toward the other end in parallel with the axial direction of the sleeve 23. A twist handle 24 extending in the radial direction of the shift operating shaft 5 is fixedly connected to the position on the rod body of the shift operating shaft 5 corresponding to the strip clamping hole. The twist handle 24 passes through the strip clamping hole and can slide with it along the strip clamping hole. An end of the sleeve 23 away from the strip clamping hole is fixedly connected to an end cover. A rotating shaft 25 arranged coaxially with the sleeve 23 is fixedly connected to the end cover. A rotating sleeve 26 arranged coaxially with the sleeve 23 and detachably connected thereto is sleeved on the rotating shaft 25. The rotating shaft 25 rotates synchronously with the rotating sleeve 26. The gear selection outer arm 20 is fixedly connected to the rotating sleeve 26 and extends in the radial direction of the rotating sleeve 26.

[0032] During implementation, the bottom end of the gear-engaging actuator rod 9 is always located between the two gear-engaging paddles 8, which can be guaranteed by the actual gear-shifting rotation angle of the gear-shifting operating shaft 5 and the actual width of the gear-engaging paddle 8, and the process size can be reasonably given during design. The reset spring 22 is a tension spring. In this embodiment, the gear selection cable 21 and the reset spring 22 are respectively connected to different ends of the gear selection outer arm 20. During implementation, they can also be connected to the same end of the gear selection outer arm 20. As long as the gear selection cable 21 pulls the gear selection outer arm 20 to rotate, the reset spring 22 is continuously stretched.

[0033] An agricultural machinery device comprises the above-mentioned agricultural machinery gearbox shift execution operation structure.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the technical solution. Ordinary technicians in this field should understand that those modifications or equivalent replacements of the technical solution of the utility model without departing from the purpose and scope of the technical solution of the utility model should be included in the scope of the claims of the utility model.

Claims

1. A gear shift execution operation structure for an agricultural machinery gearbox, comprising a gearbox housing mounted on the agricultural machinery, wherein a gear shift operation lever for performing a gear shift operation on a gear shift fork on a transmission shaft in the gearbox housing is arranged in the gearbox housing, and characterized in that: The end of the shift operating rod away from the shift fork is fixedly connected to a gear-engaging execution block, and the gear-engaging execution block is fixedly connected to a gear-engaging operation shaft parallel to the transmission shaft in the gearbox case. The two ends of the gear-engaging operation shaft respectively pass through the gearbox case on the side where it is located and extend out of the gearbox case. The gear-engaging operation shaft rotates and can be slidably connected to the gearbox case around its axial direction. When the gear-engaging execution block and the shift operating rod rotate in different directions with the shift operating shaft, the gear shifting operation can be realized through the shift operating rod; A rotating column passing through the gearbox case is vertically arranged on the gearbox case and located above the gear-engaging actuating block. The rotating column is rotatably connected to the gearbox case. A gear-engaging inner arm is fixedly connected to the column body of the rotating column located in the gearbox case. Two gear-engaging paddles are fixedly connected to the top of the gear-engaging actuating block along the axial direction of the gear-shifting operating shaft and are spaced apart in parallel. A gear-engaging actuating rod extending between the two gear-engaging paddles is fixedly connected to the gear-engaging inner arm. When the rotating column rotates in different directions around its axial direction, the rotating column can act on the inner side of the gear-engaging paddle at the corresponding end through the bottom end of the gear-engaging actuating rod, thereby pushing the gear-engaging actuating block to move along the axial corresponding end of the gear-shifting operating shaft, so that the gear-engaging operating rod can realize the gear-engaging operation. The agricultural machinery gearbox shift execution operation structure also includes a gear shift control device, which is connected to the gear shift operation shaft at either end located outside the gearbox housing through a gear shift transmission device, and can drive the gear shift operation shaft to rotate to achieve gear shifting operations. The gear shift control device is connected to the column body of the rotating column located outside the gearbox housing through a gear shift transmission device, and can drive the rotating column to rotate to achieve gear shifting operations.

2. The agricultural machinery gearbox shift execution operation structure according to claim 1, characterized in that: A mounting hole is formed on the gear engaging inner arm in a direction parallel to the center line of the rotating column, and the gear engaging actuator rod passes through the mounting hole along the center line direction of the mounting hole at one end away from the gear engaging paddle. The gear engaging actuator rod is threadedly fitted with locking nuts on the rod body at both ends of the mounting hole, which are respectively pressed against the gear engaging inner arm to fix the gear engaging actuator rod on the gear engaging inner arm.

3. The agricultural machinery gearbox shift execution operation structure according to claim 1, characterized in that: The gear-engaging execution block is provided with a connecting bolt which passes through the gear-shifting operating shaft and is threadedly connected to the gear-shifting operating rod, so that the gear-shifting operating shaft and the gear-shifting operating rod are fastened to the gear-engaging execution block.

4. The agricultural machinery gearbox shift execution operation structure according to claim 1, characterized in that: The shift control device comprises a control base fixedly connected to the agricultural machinery equipment, two shift shaft support seats are arranged at intervals in the horizontal direction on the top of the control base, shift shafts respectively fixedly connected to the two shift shaft support seats are arranged between the two shift shaft support seats along their relative directions, a shift sleeve is sleeved on the shift shaft for rotationally matching with the shift shaft, a select sleeve is fixedly connected to the upper tube body of the shift sleeve, the center line direction of the shift sleeve is perpendicular to the center line direction of the select sleeve, a select shaft rotationally matching with the shift sleeve is passed through the select sleeve, a shift rod is arranged above the select shaft, the axial direction of the shift rod is perpendicular to the axial direction of the select shaft, a shift rod seat is fixedly connected to the lower end of the shift rod, and a connecting arm is formed on the shift rod seat and is respectively fixedly connected to the two ends of the select shaft located outside the select sleeve; A shift swing arm is formed on the lower tube body of the shift sleeve, and the shift swing arm extends in a direction perpendicular to the center line of the shift sleeve. A swing hole is penetrated on the control base at a position corresponding to the shift swing arm, and the shift swing arm passes through the swing hole and extends below the control base. When the shift sleeve rotates, the shift swing arm can swing in the swing hole. A gear engaging outer arm is fixedly connected to the column body at one end of the rotating column located outside the gearbox casing. The gear engaging transmission device includes a shift cable, one end of the shift cable is hingedly connected to the shift swing arm, and the other end is hingedly connected to the gear engaging outer arm. When the shift sleeve rotates in different directions around the shift shaft, the shift swing arm can push or pull the gear engaging outer arm through the shift cable to make the rotating column rotate in different directions. A gear selecting rocker arm is fixedly connected to the shift rod seat, and the gear selecting rocker arm extends in a direction perpendicular to The gear selection sleeve is arranged to extend laterally in the direction of the center line of the gear selection sleeve, and one end of the gear shift operating shaft is located outside the gearbox casing and is synchronously connected to the gear selection outer arm. The gear shift transmission device includes a gear selection cable, one end of the gear selection cable is hingedly connected to the gear selection rocker arm, and the other end is fixedly connected to a return spring, the other end of the return spring is hung on the gear selection outer arm, and the gear selection outer arm is also fixedly connected to a reset spring, and the other end of the reset spring is fixedly connected to the agricultural machinery equipment. When the reset spring is in a natural state, the gear shift operating lever corresponds to one of the shift forks, and when the shift lever seat rotates toward one side around the gear selection shaft, the gear selection rocker arm can pull the gear selection outer arm through the gear selection cable to rotate the gear shift operating shaft, switch the gear shift operating lever to the other gear shift fork, and cause the gear selection outer arm to stretch the reset spring.

5. The agricultural machinery gearbox shift execution operation structure according to claim 4, characterized in that: The end of the shift operating shaft located outside the gearbox casing is sleeved with a sleeve that slidably cooperates with the shift operating shaft, and the sleeve is provided with at least one strip clamping hole extending toward the other end in parallel with the axial direction of the sleeve at the end where the shift operating shaft is inserted, and a twist handle extending in the radial direction of the shift operating shaft is fixedly connected at a position corresponding to the strip clamping hole on the rod body of the shift operating shaft, the twist handle passes through the strip clamping hole and can slidably cooperate with the strip clamping hole along the strip clamping hole, and an end cover is fixedly connected to the end cover with a rotating shaft arranged coaxially with the sleeve, and a rotating sleeve is sleeved on the rotating shaft and arranged coaxially with the sleeve and detachably connected thereto, the rotating shaft and the rotating sleeve rotate synchronously, and the gear selection outer arm is fixedly connected to the rotating sleeve and extends in the radial direction of the rotating sleeve.

6. An agricultural machine, characterized in that: It includes the agricultural machinery transmission gear shift execution operation structure as described in any one of claims 1 to 5.

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