A steering system and an agricultural gearbox

Abstract

The present invention discloses a steering system and an agricultural gearbox, including a housing and a transmission gear set disposed within the housing; further comprising two shifting mechanisms, which are in transmission connection with a reversing gear set, and the two shifting mechanisms correspond to the two reversing gear sets one by one; the shifting mechanism includes a fixed cross bar disposed on the housing and a sliding block slidably disposed on the fixed cross bar, one end of the rotating column is provided with a transmission convex bar, and a protruding cylinder is fixedly disposed on the transmission convex bar, and the protruding cylinder is slidably disposed in a sliding groove formed on the sliding block. The steering system and the agricultural gearbox provided by the present invention can smoothly drive the sliding block through the setting of the rotating convex bar and the protruding cylinder, and then drive the paddle mechanism to move through the sliding block, so that the reversing gear set in transmission connection with the paddle mechanism moves, realizing the switching of power and the steering of power, and improving the transmission smoothness and stability of the steering assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of gearboxes, and particularly to a steering system and an agricultural gearbox. Background Art

[0002] An agricultural gearbox is an important component in agricultural machinery. It is mainly used to change the rotational speed and torque output by the engine. Commonly used ones include crawler gearboxes, which can adapt to different operating requirements and working conditions; agricultural gearboxes usually have multiple gears, and different gear combinations are used to achieve different transmission ratios. Their design needs to consider the characteristics of agricultural operations, and their working environment will face significant changes. Therefore, the ability to handle load changes and harsh working environments is required for the gearbox.

[0003] The deficiencies of the prior art are as follows: In the prior art, when most gearboxes are in use, due to different working conditions, their usage scenarios directly affect the operation mode of the crawler gearbox, and the power consumption is relatively large. There are differences in the shifting force and the reversing force, resulting in uneven shifting, which is not convenient for the gearbox to shift gears. Prolonged use will affect the service life of the shifting mechanism, and there are certain limitations in use. Summary of the Invention

[0004] The purpose of the present invention is to provide a steering system and an agricultural gearbox to solve the above deficiencies in the prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A steering system and an agricultural gearbox, including a housing and a transmission gear set disposed in the housing. The transmission gear set is drivingly connected to an output shaft to transmit the input power to the output shaft. It also includes two reversing gear sets, which are selectively drivingly connected to the transmission gear set;

[0007] It further includes two shifting mechanisms, which are drivingly connected to the reversing gear sets, and the two shifting mechanisms correspond to the two reversing gear sets one by one;

[0008] The shifting mechanism includes a fixed crossbar disposed on the housing and a sliding block slidably disposed on the fixed crossbar;

[0009] It further includes a rotating column rotatably disposed on the housing. One end of the rotating column is provided with a transmission convex rod, and a protruding cylinder is fixedly disposed on the transmission convex rod. The protruding cylinder is slidably disposed in a sliding groove opened on the sliding block;

[0010] It further includes a paddle mechanism, which is drivingly connected to the sliding block;

[0011] It further includes a synchronization component, and the synchronization component is drivingly connected to two shifting mechanisms.

[0012] As a further preferred solution in the embodiment of the present invention, the transmission gear set includes a first gear and a driving gear disposed in the housing, the driving gear is transmitted as a power gear, and the first gear is drivingly connected through a reversing gear set;

[0013] The reversing gear set includes a first coaxial sleeve and a first coaxial gear slidably disposed on the shaft of the first gear; the first coaxial sleeve rotates synchronously with the shaft of the first gear.

[0014] As a further preferred solution in the embodiment of the present invention, the reversing gear set further includes a second gear meshing with the first coaxial gear and a brake gear disposed in the housing, the brake gear is coaxial with the shaft of the third gear; and the second gear meshes with the brake gear.

[0015] As a further preferred solution in the embodiment of the present invention, the third coaxial gear is selectively meshed with the brake gear by the drive of the second shifting mechanism. When the third coaxial gear meshes with the brake gear, the third coaxial gear is disengaged from the third gear. When the first coaxial gear is drivingly meshed with the first gear and the third coaxial gear meshes with the brake gear, the input power is transmitted to the reversing gear set.

[0016] As a further preferred solution in the embodiment of the present invention, the transmission gear set further includes a fourth gear and a fourth coaxial gear coaxially connected, and the fourth coaxial gear meshes with the output gear.

[0017] As a further preferred solution in the embodiment of the present invention, the paddle mechanism includes a shift fork fixedly connected to the sliding block, and the shift fork is sleeved in the groove of the first coaxial gear. The sliding of the shift fork along the axial direction of the fixed cross bar can drive the first coaxial gear to move synchronously.

[0018] As a further preferred solution in the embodiment of the present invention, the synchronization component can drive the two shifting mechanisms to move independently.

[0019] As a further preferred solution in the embodiment of the present invention, the synchronization component includes a transmission rod, one end of the transmission rod is rotatably disposed on the rotating column, the other end is slidably provided with a telescopic rod, and the other end of the telescopic rod is rotatably disposed on the rotating block of another shifting mechanism.

[0020] As a further preferred solution in the embodiments of the present invention, the two shifting mechanisms are drivingly connected through a synchronization component. During the movement of one shifting mechanism, the other shifting mechanism can be driven to move in the reverse direction through the synchronization component. The synchronization component includes a transmission rod rotatably arranged on a rotating column. The transmission rod is slidably connected to the housing through a first fixed horizontal shaft. One end of the transmission rod is provided with a connecting driving rod, and one end of the connecting driving rod is fixedly provided with a second transmission rack. A reversing gear is drivingly engaged on the second transmission rack. A first transmission rack is fixedly arranged inside the transmission rod, and the first transmission rack is engaged with the reversing gear. One end of the connecting driving rod is rotatably arranged on another rotating column.

[0021] As a further preferred solution in the embodiments of the present invention, it further includes a steering component. The shifting mechanism is drivingly connected to the steering component through a linkage component. When the shifting mechanism drives the reversing gear set to perform reversing transmission, the steering component is passively driven to move through the linkage component.

[0022] In the above technical solution, the beneficial effects of a steering system and an agricultural transmission provided by the present invention are as follows:

[0023] By providing two shifting mechanisms, the present invention enables, when shifting gears in a crawler-type transmission, the driving slider to be smoothly driven through the rotation of the convex rod and the protruding cylinder, and then the shifting mechanism is driven to move through the slider, so that the reversing gear set drivingly connected to the shifting mechanism moves, realizing the switching of power and the steering of power. That is, the transmission smoothness and stability of the shifting mechanism can be greatly improved.

[0024] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory and are not intended to limit the present disclosure.

[0025] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a schematic diagram of the overall structure provided by the embodiments of the present invention;

[0028] Figure 2 It is a schematic diagram of the overall internal structure provided by the embodiments of the present invention;

[0029] Figure 3 Internal structure schematic diagram provided by an embodiment of the present invention;

[0030] Figure 4 Enlarged structure schematic diagram at position B provided by an embodiment of the present invention;

[0031] Figure 5 Structure schematic diagram of the shift mechanism, transmission gear set, and wire change gear set provided by an embodiment of the present invention;

[0032] Figure 6 Internal structure schematic diagram of the transmission provided by an embodiment of the present invention;

[0033] Figure 7 Structure schematic diagram of a partial shift mechanism provided by an embodiment of the present invention;

[0034] Figure 8 Partial structure schematic diagram of the shift mechanism provided by an embodiment of the present invention;

[0035] Figure 9 Structure schematic diagram of the synchronization component of the first embodiment provided by an embodiment of the present invention;

[0036] Figure 10 Structure schematic diagram of the rotating column; connecting rod, and bearing shaft provided by an embodiment of the present invention;

[0037] Figure 11 Planar schematic diagram of the synchronization component, shift mechanism, and dedicated line component provided by an embodiment of the present invention;

[0038] Figure 12 Structure schematic diagram of the connecting rod, transmission gear, and bearing block provided by an embodiment of the present invention;

[0039] Figure 13 Structure schematic diagram of the transmission gear and bearing block provided by an embodiment of the present invention;

[0040] Figure 14 Structure schematic diagram of the synchronization component of the second embodiment provided by an embodiment of the present invention;

[0041] Figure 15 Structure schematic diagram of the rotating column and progressive gear provided by an embodiment of the present invention;

[0042] Figure 16 Structure schematic diagram of the transmission caliper provided by an embodiment of the present invention;

[0043] Explanation of reference numerals:

[0044] 1. Housing; 11. Driving gear; 12. Speed ​​gear; 13. First gear; 131. First coaxial sleeve; 132. First coaxial gear; 1321. Clamping block; 14. Second gear; 15. Third gear; 151. Third coaxial gear; 1511. Transmission clamping gear; 152. Brake gear; 16. Fourth gear; 161. Fourth coaxial gear; 17. Output gear; 2. Crankshaft housing; 21. Output shaft; 3. Rotating rod; 31. Sliding block; 32. Rotating column; 321. Bearing column; 32 2. Progressive gear; 33. Fixed cross bar; 34. Shift fork; 341. Transmission cam; 3411. Protruding cylinder; 4. Transmission rod; 41. Fixed block; 42. First fixed cross axis; 43. Second fixed cross axis; 431. Reversing gear; 432. First transmission rack; 433. Second transmission rack; 4331. Connecting drive rod; 5. Connecting rod; 51. Transmission gear; 511. Bearing block; 6. Shift block; 61. Bearing shaft; 62. Shift rod; 7. Support cross axis; 71. Telescopic rod; 8. Brake assembly. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0046] Please refer to 1-16, which includes a housing 1 and a transmission gear set disposed in the housing 1, wherein the transmission gear set is transmission-connected to the output shaft 21 to transmit the input power to the output shaft 21, and further includes two reversing gear sets, which are selectively transmission-connected to the transmission gear set;

[0047] It also includes two shifting mechanisms, which are transmission-connected to the reversing gear sets, and the two shifting mechanisms correspond to the two reversing gear sets one by one;

[0048] The shift mechanism includes a fixed cross bar 33 disposed on the housing 1 and a sliding block 31 slidably disposed on the fixed cross bar 33;

[0049] It also includes a rotating column 32 rotatably disposed on the housing 1, a transmission convex rod 341 is disposed at one end of the rotating column 32, and a protruding cylinder 3411 is fixedly disposed on the transmission convex rod 341, and the protruding cylinder 3411 is slidably disposed in a sliding groove provided on the sliding block 31;

[0050] It also includes a paddle mechanism, which is transmission-connected to the sliding block 31;

[0051] It further includes a synchronization component which is drivingly connected to the two shifting mechanisms;

[0052] Through the two shifting mechanisms provided in the present invention, when shifting gears in the crawler-type gearbox, the rotation of the convex rod and the protruding cylinder 3411 can be used to smoothly drive the sliding block 31, and then the sliding block 31 drives the paddle mechanism to move, so that the reversing gear set drivingly connected to the paddle mechanism moves, realizing the switching of power and the steering of power. That is, the transmission smoothness and stability of the shifting mechanism can be greatly improved.

[0053] Through the cooperation of the reversing gear set and the shifting mechanism provided in the present invention, during the forward movement, by driving the rotating mechanism, the reversing gear set can be driven to be power-connected to the output shaft 21. That is, the power direction of the output shaft 21 can be switched, which is opposite to the power direction of the other output shaft 21. That is, the power of the output shaft 21 can be quickly reversed, realizing the in-situ rotation of the crawler vehicle, with relatively fast power response and greatly improving the steering rate.

[0054] In the further embodiment provided by the present invention, the transmission gear set includes a first gear 13 and a driving gear 11 arranged in the housing 1. The driving gear 11 is a power gear, and the first gear 13 is drivingly connected through the reversing gear set;

[0055] The reversing gear set includes a first coaxial sleeve 131 and a first coaxial gear 132 slidably arranged on the shaft of the first gear 13; the first coaxial sleeve 131 rotates synchronously with the shaft of the first gear 13.

[0056] In the further embodiment provided by the present invention, the reversing gear set further includes a second gear 14 meshing with the first coaxial gear 132 and a brake gear 152 arranged in the housing 1. The brake gear 152 is coaxial with the shaft of the third gear 15; and the second gear 14 meshes with the brake gear 152.

[0057] In the further embodiment provided by the present invention, the third coaxial gear 151 is selectively meshed with the brake gear 152 through the drive of the shifting mechanism. When the third coaxial gear 151 meshes with the brake gear 152, the third coaxial gear 151 is disengaged from the third gear 15. When the first coaxial gear 132 is drivingly meshed on the first gear 13 and the third coaxial gear 151 meshes with the brake gear 152, the input power is transmitted to the reversing gear set.

[0058] In the further embodiment provided by the present invention, the transmission gear set further includes a fourth gear 16 and a coaxially connected fourth coaxial gear 161, and the fourth coaxial gear 161 meshes with the output gear 17

[0059] In an embodiment further provided by the present invention, the shifting mechanism includes a shifting fork 34 fixedly connected to the sliding block 31, and the shifting fork 34 is sleeved in the groove of the first coaxial gear 132. The shifting fork 34 slides along the axial direction of the fixed cross bar 33, and can drive the sliding first coaxial gear 132 to move synchronously.

[0060] Specifically, the present invention provides the following parallel synchronization components:

[0061] Embodiment 1: The synchronization component can drive two shifting mechanisms to move separately. The present invention can connect the fixed block 41 through an operating rod through the setting of the synchronization component and the shifting mechanism, and then make the fixed block 41 move left and right, that is, it can be used to drive the two shifting mechanisms to perform shifting operations, which can not only reduce the number of operating rods, but also facilitate the steering operation. The synchronization component includes a transmission rod 4, one end of the transmission rod 4 is rotatably set on the rotating column 32, and the other end is slidably set with a telescopic rod 71, and the other end of the telescopic rod 71 is rotatably set on the rotating block of another shifting mechanism. Specifically, in combination with Figure 13, the support horizontal shaft 7 and the telescopic rod 71 slide relative to each other, the above-mentioned fixed block 41 is installed on the transmission rod 4, the operating rod is installed on the fixed block 41, and the operating rod is assisted by the hydraulic power assist system in the prior art. When it is used specifically, the transmission rod 4 is operated by the operating rod to move left or right, which can realize the operation of the shifting mechanism set on both sides of the transmission, and does not affect the use of the other shifting mechanism.

[0062] Embodiment 2: Two shifting mechanisms are connected through a synchronization component. During the movement of one of the steering components, the other shifting mechanism can be driven to move in the opposite direction through the synchronization component. The synchronization component includes a transmission rod 4 rotatably set on a rotating column 32. The transmission rod 4 is slidably connected to the housing 1 through a first fixed horizontal axis 42. A connecting drive rod 4331 is set at one end of the transmission rod 4, and a second transmission rack 433 is fixedly set at one end of the connecting drive rod 4331, and a reversing gear 431 is transmission-engaged on the second transmission rack 433, and a first transmission rack 432 is fixedly set on the inner side of the transmission rod 4, and the first transmission rack 432 is meshed with the reversing gear 431, and one end of the connecting drive rod 4331 is rotatably set on the other rotating column 32.

[0063] Furthermore, the present invention also provides an agricultural transmission, which further includes a steering assembly. The shifting mechanism is drivingly connected to the steering assembly through a linkage assembly. When the shifting mechanism drives the reversing gear set to reverse and transmit power, the steering assembly is passively driven to move through the linkage assembly. The linkage assembly provided in this application enables, when the reversing gear set transmits power, the third coaxial gear to be passively meshed with the brake gear. That is, it can not only improve the stability of the transmission when the transmission is moving straight and making a one-way turn, but also, when reversing in place, through the simultaneous power switching of driving the reversing gear set and the transmission gear set, greatly simplify the operation steps of the operator, and can greatly improve the power response speed of the transmission, overall improving the reversing stability and rapidity of the transmission.

[0064] Specifically, the sliding rod of the transmission rod 4 is supported stably by the fixedly arranged first fixed horizontal shaft 42 during left-right movement, which can improve the overall stability of the device.

[0065] Specifically, in another embodiment provided by the present invention, a more safe and efficient synchronization assembly is provided. Through the synchronization assembly provided by the present invention, it can drive another shifting mechanism to move in the opposite direction through the synchronization assembly, so that another reversing gear set corresponding to the shifting mechanism moves further away. That is, it can completely disconnect the power between another reversing gear set and the transmission gear set, improving the accuracy of power transmission. Moreover, through the setting of the synchronization assembly, it can ensure that when reversing, another reversing gear set will not achieve power transmission due to accidentally touching the control lever, ensuring the accuracy and stability of reversing;

[0066] The transmission gear set includes a first gear 13 and a driving gear 11 arranged in the housing 1. The driving gear 11 is the power gear, and the first gear 13 is drivingly connected through the reversing gear set;

[0067] The reversing gear set includes a first coaxial sleeve 131 and a first coaxial gear 132 slidably arranged on the shaft of the first gear 13; the first coaxial sleeve 131 rotates synchronously with the shaft of the first gear 13;

[0068] It further includes a shifting mechanism arranged in the housing 1, and the shifting mechanism is used to selectively drive the first coaxial gear 132 to be meshed and transmitted on the first coaxial sleeve 131;

[0069] When the first coaxial gear 132 is meshed and transmitted on the first gear 13, the power of the reversing gear set is transmitted to the output shaft 21 to realize the power reversal of the output shaft 21.

[0070] In an embodiment further provided by the present invention, the transmission gear set further includes a third gear 15 and a third coaxial gear 151 slidably mounted on the shaft of the third gear 15 , and the third coaxial gear 151 is selectively meshed with the third gear 15 through the drive of the shifting mechanism.

[0071] In an embodiment further provided by the present invention, the reversing gear set also includes a second gear 14 meshing with the first coaxial gear 132, and a brake gear 152 disposed in the housing 1, the brake gear 152 is coaxial with the shaft of the third gear 15; and the second gear 14 meshes with the brake gear 152.

[0072] The third coaxial gear 151 is selectively engaged with the brake gear 152 through the drive of the steering assembly. When the third coaxial gear 151 is engaged with the brake gear 152, the third coaxial gear 151 is disengaged from the third gear 15. The first coaxial gear 132 is driven to engage with the first gear 13, and the third coaxial gear 151 is engaged with the brake gear 152, so that the input power is transmitted to the reversing gear set.

[0073] Furthermore, the transmission gear set also includes a fourth gear 16 and a coaxially connected fourth coaxial gear 161 , and the fourth coaxial gear 161 is meshed with the output gear 17 .

[0074] Furthermore, a latching tooth is fixedly provided on the side wall of the first coaxial gear 132, and a latching groove matched with the latching tooth is provided on the first coaxial sleeve 131. Specifically, when reversing, the first coaxial gear 132 can be engaged with the first coaxial sleeve 131, so that the power is transmitted to the first coaxial sleeve 131 through the first gear 13, and finally transmitted to the first coaxial gear 132, and then transmitted to the second gear 14 through the first coaxial gear 132, so that the power is finally reversed.

[0075] The present invention further provides an embodiment in which the shift mechanism is connected to the steering assembly through a linkage assembly. When the shift mechanism drives the reversing gear set for reversing transmission, the linkage assembly is used to passively drive the steering assembly to move, so that the third coaxial gear 151 is meshed with the brake gear 152. Specifically, the linkage assembly provided in the present application can make the third coaxial gear 151 passively meshed with the brake gear 152 when the reversing gear set is transmitting. That is, it can not only improve the stability of the gearbox when it is traveling straight and turning in one direction during transmission, but also can greatly simplify the operating steps of the operator by simultaneously driving the power switching of the reversing gear set and the transmission gear set when reversing in place, and can also greatly improve the power response speed of the gearbox, thereby improving the reversing stability and rapidity of the gearbox as a whole.

[0076] Specifically, the one-way turn means that when the machine is moving, it turns in one direction, that is, turns left or right. For example, when the machine turns left, the left track is stationary and the right track moves to achieve a left turn. In this application, when a left turn is achieved, the third coaxial gear 151 that drives the left turn upward is separated from the third gear 15 through the steering component, so that the power can be disconnected, the left track does not move, and a left turn is achieved.

[0077] Specifically, another core of the present invention lies in that the present invention can not only drive the transmission of the reversing gear set and disconnect the power of the transmission gear set at the same time, but also when performing a one-way turn operation, the steering component will not affect the shifting mechanism, and the power can be cut off without driving the meshing transmission of the reversing gear set through the linkage component, greatly improving the linkage and functionality of the shifting mechanism, the steering component and the linkage component.

[0078] In an embodiment further provided by the present invention, the linkage component includes a rotating column 32 rotatably provided on the housing 1 and a connecting rod 5 rotatably provided on the rotating column 32, and the connecting rod 5 is in transmission connection with the steering component.

[0079] In an embodiment further provided by the present invention, the steering component includes a lever 62 sleeved on the third coaxial gear 151, and one end of the lever 62 is fixedly connected with a dial block 6, and the connecting block is movably connected with the dial block 6, and the dial block 6 is rotatably provided on the housing 1.

[0080] In an embodiment further provided by the present invention, it further includes a transmission component provided in the connecting rod 5. The transmission component includes a bearing column 321 fixedly provided on the rotating block, and a progressive gear 322 is fixedly provided on the bearing column 321. One end of the dial block 6 is rotatably provided on the bearing column 321. A transmission gear 51 is slidably provided in the connecting rod 5, and a bearing block 511 is fixedly provided on the transmission gear 51. A bearing groove is opened at the lower end of the bearing block 511, and the bearing shaft 61 at one end of the dial block 6 is carried in the bearing groove;

[0081] When the present invention is in motion, first, the power received by the driving gear 11 is transmitted to the speed-changing gear 12, and then the speed-changing gear 12 drives the engaged first gear 13 to move, and the first gear 13 can be driven to move, that is, the coaxial first coaxial sleeve 131 can be driven to move in the following states

[0082] When the vehicle moves forward, the power is transmitted through the first gear 13 to drive the meshing third gear 15. At this time, the shift mechanism does not operate, and the third coaxial gear 151 is engaged with the third gear 15 at the side, and rotates synchronously with the third gear 15, driving the meshing third coaxial gear 151 to rotate, that is, it can drive the fourth gear 16 to move, and then the fourth coaxial gear 161 coaxial with the fourth gear 16 rotates, and then the fourth coaxial gear 161 drives the meshing output gear 17 to rotate, that is, it can drive the output shaft 21 to move, so that the crawler connected to the output shaft 21 moves, that is, it can drive the crawler to move, that is, it can achieve forward movement;

[0083] When making a turn, combine Figure 4 as well as Figure 11 For example, when realizing the left turn of the vehicle, the shift block 6 for controlling the left crawler track is shifted, which is driven by the connected joystick, and then the shift block 6 rotates, thereby driving the connected shift rod 62 to rotate, driving the third coaxial gear 151 to axially split, that is, the third coaxial gear 151 is disengaged from the third gear 15, that is, the power of the third gear 15 is disconnected, so that the output gear 17 of the transmission connection does not rotate, and then the other output gear 17 rotates normally, that is, the crawler track on the left is not active, and the crawler track on the right rotates, thereby realizing the left turn of the vehicle, and according to the same principle as above, the crawler track can turn right;

[0084] When the vehicle needs to turn in place, it is necessary to shift the gear mechanism. Specifically, in conjunction with the accompanying drawings, especially Figure 5 , Figure 11 When the vehicle needs to turn left in situ, the joystick connected to the fixed block 41 is first operated to Figure 11As shown, operate the joystick to the left, which then drives the transmission rod 4 to move, and then drives the transmission rod 4 to move to the left. Then, it drives the connected rotating column 32 to rotate to the left, with the rotation angle being 20 - 25°. When the rotating column 32 rotates, it drives the rotationally connected connecting rod 5 to move upward. During the upward movement, rotation occurs between the rotating column 32 and the connecting rod 5. Then, when rotating, the bearing column 321 and the fixedly connected progressive gear 322 rotate relative to the connecting rod 5. Then, when rotating, the progressive gear 322 drives the transmission gear 51 to move upward, that is, drives the connected bearing block 511 to move upward as well. That is, it can make the shift block 6 carried on the bearing block 511 move upward, so that the shift block 6 moves upward. That is, the present application can, through the cooperation of the set shifting mechanism, simultaneously realize the synchronous movement of the rotating column 32 and the shift block 6. During the 25° rotation of the rotating column 32, through the set transmission component, the shift block 6 can obtain a larger steering angle, enabling the shift lever 62 to obtain a larger axial displacement. That is, it can drive the third coaxial gear 151 to disengage from the third gear 15, and then the transmission teeth 1511 connected to the side of the third coaxial gear 151 are inserted into the brake assembly 8. Then, the power is disconnected from the third gear 15, and the transmission teeth 1511 are inserted into the brake assembly 8 and move synchronously with the brake gear 152, making the power response faster;

[0085] Secondly, during the rotation of the rotating column 32, as shown in Figure 7 it drives the transmission convex rod 341 and the transmission-connected sliding block 31 to move along the fixed crossbar 33. That is, it can drive the engaged shift fork 34 to move, that is, it can drive the engaging block 1321 on the side of the first coaxial gear 132 to engage with the first coaxial sleeve 131, enabling the power of the first coaxial sleeve 131 to be transmitted to the first coaxial gear 132. Then, the first coaxial gear 132 drives the engaged second gear 14 to rotate. Since the second gear 14 is engaged with the brake gear 152, it can drive the brake assembly 8 to rotate, that is, it can drive the transmission teeth 1511 engaged in the brake assembly 8 to move, thereby driving the third coaxial gear 151 to rotate, and then driving the fourth gear 16 and the coaxial fourth coaxial gear 161 engaged with the third coaxial gear 151 to rotate, finally driving the engaged output gear 17 to rotate in the opposite direction (due to the added second gear 14, the power finally transmitted to the output gear 17 is opposite), that is, it can make the power directions of the left and right tracks opposite, that is, it can make the vehicle reverse in place.

[0086] Only some exemplary embodiments of the present invention have been described by way of illustration. Undoubtedly, those of ordinary skill in the art can modify the described embodiments in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A steering system, comprising a transmission gear set arranged in a housing (1), and also comprising an output shaft (21), wherein the transmission gear set is transmission-connected to the output shaft (21) to transmit input power to the output shaft (21), characterized in that: The invention also comprises two reversing gear sets which are selectively connected to the transmission gear set in transmission; two shifting mechanisms which are connected to the reversing gear set in transmission, and the two shifting mechanisms correspond to the two reversing gear sets in one-to-one correspondence; the shifting mechanism comprises a fixed cross bar (33) arranged on the housing (1) and a sliding block (31) slidably arranged on the fixed cross bar (33); the invention also comprises a rotating column (32) rotatably arranged on the housing (1), a transmission convex rod (341) being arranged at one end of the rotating column (32), a protruding cylinder (3411) being fixedly arranged on the transmission convex rod (341), and the protruding cylinder (3411) being slidably arranged in a sliding groove provided on the sliding block (31); the invention also comprises a paddle mechanism which is connected to the sliding block (31 in transmission); and a synchronizing assembly which is connected to the two shifting mechanisms in transmission; The transmission gear set comprises a first gear (13) and a driving gear (11) arranged in a housing (1); the driving gear (11) is a power gear, and the first gear (13) is connected to the first gear through a reversing gear set; the reversing gear set comprises a first coaxial sleeve (131) and a first coaxial gear (132) slidably arranged on a shaft on the first gear (13); the first coaxial sleeve (131) rotates synchronously with the shaft of the first gear (13); The reversing gear set further comprises a second gear (14) meshed with the first coaxial gear (132), and a brake gear (152) disposed in the housing (1), wherein the brake gear (152) is coaxial with the shaft of the third gear (15); and the second gear (14) is meshed with the brake gear (152); The third coaxial gear (151) is selectively meshed with the brake gear (152) through the drive of the shift mechanism. When the third coaxial gear (151) is meshed with the brake gear (152), the third coaxial gear (151) is disengaged from the third gear (15). When the first coaxial gear (132) is meshed with the first gear (13), and the third coaxial gear (151) is meshed with the brake gear (152), the input power is transmitted to the reversing gear set. The transmission gear set also includes a fourth gear (16) and a fourth coaxial gear (161) connected coaxially, wherein the fourth coaxial gear (161) is meshed with the output gear (17); the two shifting mechanisms are transmission-connected via a synchronization assembly, and during the movement of one of the shifting mechanisms, the other shifting mechanism can be driven to move in the opposite direction via the synchronization assembly, wherein the synchronization assembly includes a transmission rod (4) rotatably arranged on a rotating column (32), the transmission rod (4) being slidably connected to the housing (1) via a first fixed transverse shaft (42), and the A connecting drive rod (4331) is provided at one end of the transmission rod (4), and a second transmission rack (433) is fixedly provided at one end of the connecting drive rod (4331), and a reversing gear (431) is transmission-engaged on the second transmission rack (433), and a first transmission rack (432) is fixedly provided on the inner side of the transmission rod (4), and the first transmission rack (432) is engaged with the reversing gear (431), and one end of the connecting drive rod (4331) is rotatably provided on another rotating column (32).

2. A steering system according to claim 1, characterized in that: The shifting mechanism comprises a shifting fork (34) fixedly connected to the sliding block (31), and the shifting fork (34) is sleeved in a groove of the first coaxial gear (132). The shifting fork (34) slides axially along the fixed crossbar (33) to drive the sliding first coaxial gear (132) to move synchronously.

3. A steering system according to claim 1, characterized in that: The synchronization assembly can drive the two shifting mechanisms to move independently.

4. A steering system according to claim 3, characterized in that: The synchronization component comprises a transmission rod (4), one end of which is rotatably arranged on a rotating column (32), and the other end of which is slidably arranged with a telescopic rod (71), and the other end of which is rotatably arranged on a rotating block of another shifting mechanism.

5. An agricultural gearbox, comprising a steering system according to any one of claims 1 to 4, characterized in that: It also includes a steering assembly. The shift mechanism is transmission-connected to the steering assembly through a linkage assembly. When the shift mechanism drives the reversing gear set for reversing transmission, the steering assembly is passively driven to move through the linkage assembly.

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