A mechanical in-situ steering gearbox

Abstract

The present invention discloses a transmission gear set including a shell and a transmission gear set arranged in the shell, wherein the transmission of the transmission gear set is connected to the output shaft; the transmission gear set includes a first gear and a driving gear arranged in the shell, and the driving gear transmission is a power gear; the reversing gear set includes a first coaxial sleeve and a first coaxial gear slidably arranged on a shaft rod on the first gear; the first coaxial sleeve rotates synchronously with the shaft rod of the first gear; and also includes a first steering assembly, which is used to selectively drive the first coaxial gear to engage with the first coaxial sleeve; a mechanical in-situ steering gearbox provided by the present invention can realize the switching of the power direction of the output shaft, which is opposite to the power direction of the other output shaft, and can quickly realize the opposite power of the output shaft, thereby realizing the in-situ rotation of the crawler-type vehicle, with faster power response and improved steering rate.

Description

Technical Field

[0001] The present invention relates to the technical field of gearboxes, and in particular to a mechanical in-situ steering gearbox. Background Art

[0002] Agricultural gearbox is an important component in agricultural machinery. It is mainly used to change the speed and torque of engine output. Commonly used ones are crawler gearboxes, which can adapt to different operating requirements and working conditions.

[0003] Agricultural gearboxes usually have multiple gears, and different transmission ratios are achieved through different gear combinations. Their design needs to take into account the characteristics of agricultural operations. Their working environment will face great changes, so load changes and harsh working environments are the capabilities that the gearbox needs to have.

[0004] The shortcomings of the prior art are: in the prior art, most gearboxes need to be turned on the spot due to different working conditions when in use, so as to turn through the smallest space. The gearboxes of existing agricultural machinery are generally turned by braking one side of the track. This steering method not only has a large turning radius, but also causes different levels of wear on the ground and a large power loss. There are also some agricultural gearboxes on the market that can turn on the spot, but due to their complicated operation, they have a slow power response. For this reason, we provide an agricultural gearbox that can respond quickly and can turn on the spot. Summary of the invention

[0005] The object of the present invention is to provide a mechanical in-situ steering gearbox to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A mechanical in-situ steering gearbox comprises a housing and a transmission gear set arranged in the housing, wherein the transmission gear set is connected to an output shaft for transmitting input power to the output shaft; and further comprises a reversing gear set which is selectively connected to the transmission gear set for transmission;

[0008] The transmission gear set includes a first gear and a driving gear arranged in the housing, the driving gear is a power gear, and the first gear is connected through a reversing gear set;

[0009] The reversing gear set comprises a first coaxial sleeve and a first coaxial gear slidably arranged on a shaft on the first gear; the first coaxial sleeve rotates synchronously with the shaft of the first gear;

[0010] It also includes a first steering assembly, which is disposed in the housing, and the first steering assembly is used to selectively drive the first coaxial gear to engage with the first coaxial sleeve;

[0011] When the first coaxial gear is meshed with the first gear, the power of the reversing gear set is transmitted to the output shaft to achieve power reversal of the output shaft.

[0012] As a further preferred solution of the present invention, the transmission gear set also includes a third gear and a third coaxial gear slidably mounted on the third gear shaft, and the third coaxial gear is selectively meshed with the third gear through the drive of the second steering assembly.

[0013] As a further preferred solution of the present invention, the reversing gear set further includes a second gear meshed with the first coaxial gear, a brake gear disposed in the housing, the brake gear being coaxial with the third gear shaft; and the second gear meshes with the brake gear;

[0014] The third coaxial gear is selectively meshed with the brake gear through the drive of the second steering assembly. When the third coaxial gear is meshed with the brake gear, the third coaxial gear is disengaged from the third gear. When the first coaxial gear is transmission-engaged with the first gear and the third coaxial gear is meshed with the brake gear, the input power is transmitted to the reversing gear set.

[0015] As a further preferred solution 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 is meshed with the output gear.

[0016] As a further preferred solution of the present invention, a latching tooth is fixedly provided on the side wall of the first coaxial gear, and a latching groove matched with the latching tooth is formed on the first coaxial sleeve.

[0017] As a further preferred solution of the present invention, the first steering assembly is connected to the second steering assembly through a linkage assembly. When the first steering assembly drives the reversing gear set to reversing, the second steering assembly is passively driven to move through the linkage assembly, so that the third coaxial gear engages with the brake gear.

[0018] As a further preferred solution of the present invention, the linkage assembly includes a rotating column rotatably arranged on the housing, a connecting rod rotatably arranged on the rotating column, and the connecting rod is transmission-connected to the second steering assembly.

[0019] As a further preferred solution of the present invention, the second steering assembly includes a shifting rod sleeved on the third coaxial gear, and one end of the shifting rod is fixedly connected to a shifting block, and the connecting block is movably connected to the shifting block, and the shifting block is rotatably arranged on the housing.

[0020] As a further preferred scheme of the present invention, it also includes a transmission assembly arranged in the connecting rod, the transmission assembly includes a bearing column fixedly arranged on the rotating block, and a progressive gear is fixedly arranged on the bearing column, and one end of the shift block is rotatably arranged on the bearing column, a transmission gear is slidably arranged in the connecting rod, and a bearing block is fixedly arranged on the transmission gear, and a bearing groove is provided at the lower end of the bearing block, and the shaft rod at one end of the shift block is carried in the bearing groove.

[0021] As a further preferred solution of the present invention, it also includes a synchronization component, which transmission connects the two first steering components, and during the movement of one of the first steering components, the synchronization component can drive the other first steering component to move in the opposite direction.

[0022] In the above technical solution, the mechanical in-situ steering gearbox provided by the present invention has the following beneficial effects:

[0023] The present invention cooperates with the first steering assembly and the second steering assembly through the arrangement of the reversing gear set, so that during the process of forward walking, the reversing gear set can be driven by the rotating mechanism to drive the power connection with the output shaft, that is, the power direction of the output shaft can be switched to be opposite to the power direction of the other output shaft, that is, the power of the output shaft can be quickly reversed, so that the tracked vehicle can rotate in place, the power response is faster, and the steering rate is greatly improved.

[0024] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the 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 comprehensive 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 embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0027] Figure 1 A schematic diagram of the overall internal structure provided by an embodiment of the present invention;

[0028] Figure 2 A schematic diagram of the enlarged structure of point B provided in an embodiment of the present invention;

[0029] Figure 3 Provides an overall structural diagram for an embodiment of the present invention;

[0030] Figure 4A schematic diagram of the structure inside the housing is provided for an embodiment of the present invention;

[0031] Figure 5 A partial structural schematic diagram of a first steering assembly provided in an embodiment of the present invention;

[0032] Figure 6 A schematic diagram of a shift block structure provided in an embodiment of the present invention;

[0033] Figure 7 A schematic diagram of the structures of a synchronization component, a first steering component and a second component provided in an embodiment of the present invention;

[0034] Figure 8 A schematic diagram of the enlarged structure of point C provided in an embodiment of the present invention;

[0035] Fig. 9 A schematic diagram of the structure of a rotating column provided by an embodiment of the present invention;

[0036] Fig.10 A schematic diagram of the structure of a connecting rod provided in an embodiment of the present invention;

[0037] Fig.11 A schematic diagram of the structure of a transmission gear and a bearing block provided in an embodiment of the present invention;

[0038] Fig.12 A schematic diagram of the structure of a synchronization component of a second embodiment provided by an embodiment of the present invention;

[0039] Fig.13 A schematic diagram of the structure of a synchronization component of a first embodiment provided by an embodiment of the present invention;

[0040] Fig.14 A schematic structural diagram of a transmission caliper provided in an embodiment of the present invention.

[0041] Description of reference numerals:

[0042] 1. Housing; 11. Driving gear; 12. Speed ​​change 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. Side housing; 21. Output shaft; 31. Sliding block; 32. Rotating column; 321. Bearing column; 322. Transmission Feed gear; 33, fixed cross bar; 34, shift fork; 341, transmission protruding rod; 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, supporting cross axis; 71, telescopic rod; 8, brake assembly. DETAILED DESCRIPTION

[0043] 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.

[0044] See also Figure 1-14 A mechanical in-situ steering gearbox, comprising a housing 1 and a side housing 2, and a transmission gear set arranged in the housing 1, the transmission gear set is transmission-connected to the output shaft 21, and transmits the input power to the output shaft 21, and also comprises a reversing gear set, which is selectively transmission-connected to the transmission gear set;

[0045] 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 connected to the housing 1 through a reversing gear set.

[0046] The reversing gear set includes a first coaxial sleeve 131 and a first coaxial gear 132 which are 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;

[0047] It also includes a first steering assembly, which is disposed in the housing 1, and is used to selectively drive the first coaxial gear 132 to engage with the first coaxial sleeve 131;

[0048] When the first coaxial gear 132 is meshed with the first gear 13 , the power of the reversing gear set is transmitted to the output shaft 21 , so as to achieve power reversal of the output shaft 21 .

[0049] The present invention cooperates with the first steering assembly and the second steering assembly through the arrangement of the reversing gear set, so that during the forward walking process, the reversing gear set is driven by the rotating mechanism to drive the power connection with 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, so that the tracked vehicle can rotate in place, the power response is faster, and the steering rate is greatly improved.

[0050] In an embodiment further provided by the present invention, the transmission gear set also 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 second steering assembly.

[0051] 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.

[0052] The third coaxial gear 151 is selectively engaged with the brake gear 152 through the drive of the second 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.

[0053] 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 .

[0054] 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.

[0055] The present invention further provides an embodiment in which the first steering assembly is connected to the second steering assembly through a linkage assembly, and when the first steering assembly drives the reversing gear set to perform reversing transmission, the second steering assembly is passively driven to move through the linkage assembly, 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 during transmission of the reversing gear set, that is, it can not only improve the stability of the gearbox when 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 overall reversing stability and rapidity of the gearbox.

[0056] Specifically, one-way turning means that the machine turns in one direction while moving, 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 the left turn. In the present application, when the left turn is achieved, the third coaxial gear 151 and the third gear 15 are driven by the second steering assembly to separate the left steering wheel, thereby achieving power disconnection, the left track does not move, and the left turn is achieved.

[0057] Specifically, another core of the present invention is that the present invention can not only simultaneously drive the transmission of the reversing gear set and the power disconnection of the transmission gear set, but also when performing a one-way turn, the second steering assembly will not affect the first steering assembly, and can achieve power cut-off while not driving the meshing transmission of the reversing gear set through the linkage assembly, thereby greatly improving the linkage and functionality of the first steering assembly, the second steering assembly, and the linkage assembly.

[0058] The present invention further provides an embodiment in which the linkage assembly includes a rotating column 32 rotatably disposed on the housing 1 to rotate a connecting rod 5 disposed on the rotating column 32 , and the connecting rod 5 is transmission-connected to the second steering assembly.

[0059] The present invention further provides an embodiment in which the second steering assembly includes a shifting rod 62 sleeved on the third coaxial gear 151, and one end of the shifting rod 62 is fixedly connected to a shifting block 6, and the connecting block is movably connected to the shifting block 6, and the shifting block 6 is rotatably arranged on the housing 1.

[0060] The embodiment further provided by the present invention also includes a transmission assembly arranged in the connecting rod 5, the transmission assembly includes a bearing column 321 fixedly arranged on the rotating block, and a progressive gear 322 is fixedly arranged on the bearing column 321, and one end of the shift block 6 is rotatably arranged on the bearing column 321, a transmission gear 51 is slidably arranged in the connecting rod 5, and a bearing block 511 is fixedly arranged on the transmission gear 51, and a bearing groove is provided at the lower end of the bearing block 511, and the bearing shaft 61 at one end of the shift block 6 is carried in the bearing groove.

[0061] The present invention also provides an agricultural gearbox including the above-mentioned steering mechanism, and also includes a synchronization component, which transmits and connects the two first steering components, and during the movement of one of the first steering components, the other first steering component can be driven to move in the opposite direction through the synchronization component. Specifically, through the setting of the synchronization component, when one of the first steering components is in operation, the other first steering component can be driven to move in the opposite direction through the synchronization component, and when the first steering component realizes the power transmission of the first coaxial gear 132, the power of the other first coaxial gear 132 can be completely disconnected, ensuring that the other first coaxial gear 132 will not realize power transmission due to the accidental touch of the joystick, thereby ensuring the accuracy of the reversing.

[0062] Embodiment 2: The synchronization component includes a transmission rod 4 rotatably set on a rotating column 32, the transmission rod 4 is slidably connected to the shell 1 through a first fixed horizontal axis 42, and 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 second fixed horizontal axis 43 is fixedly set at one end of the reversing gear 431, and the second fixed horizontal axis 43 is fixedly set on the shell 1, and a first drive rack is fixedly set on the inner side of the transmission rod 4, and the first drive rack is engaged with the reversing gear 431, and one end of the connecting drive rod 4331 is rotatably set on another rotating column 32.

[0063] Embodiment 1: The synchronization assembly can drive the two first steering assemblies to move separately. The present invention can connect the fixed block 41 through an operating rod through the setting of the synchronization assembly and the first steering assembly, and then make the fixed block 41 move left and right, that is, it can be used to drive the two first steering assemblies to perform shifting operations, which can not only reduce the number of operating rods, but also facilitate steering operations.

[0064] One end of the transmission rod 4 is rotatably arranged on the rotating column 32, and the other end is slidably arranged with a telescopic rod 71, and the other end of the telescopic rod 71 is rotatably arranged on the rotating block of the other first steering assembly. Specifically, in combination with Figure 13, the support horizontal shaft 7 and the telescopic rod 71 slide relatively, 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 to move left or right by the operating rod, which can realize the operation of the first steering assemblies set on both sides of the transmission respectively, and does not affect the use of the other first steering assembly.

[0065] In a further embodiment of the present invention, the first steering assembly further comprises a fixed cross bar 33 disposed on the housing 1 and a sliding block 31 slidably disposed on the fixed cross bar 33;

[0066] 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;

[0067] The present invention provides two first steering assemblies, so that when the crawler-type transmission is shifting gears, the sliding block 31 can be smoothly driven by rotating the convex rod and the protruding cylinder 3411, and then the paddle mechanism is driven to move by the sliding block 31, so that the reversing gear set connected to the paddle mechanism moves, and the power switching and power steering are realized, that is, the transmission smoothness and stability of the reversing mechanism can be greatly improved.

[0068] The present invention, through the coordination of the reversing gear set and the second steering assembly, can achieve, during the process of forward walking, by driving the second steering assembly, driving the reversing gear set to be power-connected with 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, so that the tracked vehicle can rotate in place, the power response is faster, and the steering rate is greatly improved.

[0069] The linkage assembly provided in the present application can make the third coaxial gear passively mesh with the brake gear when the reversing gear set is transmitting, that is, it can not only improve the stability of the gearbox when it is moving 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 switching stability and rapidity of the gearbox as a whole.

[0070] Specifically, the sliding rod of the transmission rod 4 is stably supported by the fixed first fixed horizontal axis 42 when moving left and right, which can improve the stability of the device as a whole.

[0071] Specifically, in another embodiment provided by the present invention, a safer and more efficient synchronization component is provided. The present invention can drive another first steering component to move in the opposite direction through the synchronization component, so as to achieve a further distance between another reversing gear group corresponding to the first steering component, that is, the power of the other reversing gear group and the transmission gear group can be completely disconnected, thereby improving the accuracy of power transmission. Moreover, through the setting of the synchronization component, it can be ensured that when reversing, the other reversing gear group will not realize power transmission due to accidental touching of the joystick, thereby ensuring the accuracy and stability of reversing.

[0072] When the present invention is in motion, first the power received by the driving gear 11 is transmitted to the speed gear 12, and then the speed gear 12 drives the meshing first gear 13 to move, which can drive the first gear 13 to move, that is, it can drive the coaxial first coaxial sleeve 131 to move in the following states:

[0073] 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 first steering assembly 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;

[0074] When making a turn, combine Figure 4 as well as Fig.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;

[0075] When the vehicle needs to turn in place, it is necessary to turn the first steering assembly. Specifically, in conjunction with the accompanying drawings, especially Figure 5 , Fig.11 When the vehicle needs to turn left in situ, the joystick connected to the fixed block 41 is first operated to Fig.11 As shown, the joystick is operated to the left, and then the transmission rod 4 is driven to move, and then the transmission rod 4 is driven to move to the left, and then the connected rotating column 32 is driven to rotate to the left, and the rotation angle is 20-25°. Then, when the rotating column 32 rotates, it drives the rotationally connected connecting rod 5 to move upward. During the upward movement, the rotating column 32 and the connecting rod 5 rotate. 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, that is, it can enable the shift block 6 carried on the bearing block 511 to move upward. The shift block 6 moves upward, thereby making the shift block 6 move upward, that is, the present application can realize the synchronous movement of the rotating column 32 and the shift block 6 by cooperating with the first steering assembly. In the process of the rotating column 32 rotating 25°, the shift block 6 can obtain a larger steering angle through the transmission assembly, so that the shift rod 62 can 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 tooth 1511 connected to the side of the third coaxial gear 151 is inserted into the brake assembly 8, and then the power is disconnected from the third gear 15, and then the transmission tooth 1511 is inserted into the brake assembly 8, and moves synchronously with the brake gear 152, so that the power response is faster;

[0076] Secondly, during the rotation of the rotating column 32, the Figure 7 As shown, the transmission protrusion 341 and the transmission connected sliding block 31 are driven to move along the fixed cross bar 33, that is, the engaged shift fork 34 can be driven to move, that is, the engaging block 1321 on the side of the first coaxial gear 132 can be driven to engage with the first coaxial sleeve 131, so that the power of the first coaxial sleeve 131 is transmitted to the first coaxial gear 132, and then the first coaxial gear 132 drives the engaged second gear 14 to rotate, and since the second gear 14 is engaged with the brake gear 152, the brake assembly 8 can be driven to rotate. The third coaxial gear 151 is driven to rotate, thereby driving the fourth gear 16 meshing with the third coaxial gear 151 and the coaxial fourth coaxial gear 161 to rotate, and finally driving the meshing output gear 17 to rotate in the opposite direction (due to the addition of the second gear 14, the power finally transmitted to the output gear 17 is opposite), that is, the power directions of the left track and the right track are opposite, that is, the vehicle can be reversed on the spot.

[0077] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions 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 mechanical in-situ steering gearbox, comprising a housing (1) and a transmission gear set arranged in the housing (1), wherein the transmission gear set is transmission-connected to an output shaft (21) to transmit input power to the output shaft (21), and characterized in that: It also includes a reversing gear set, which is selectively connected to the transmission gear set; The transmission gear set comprises 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 transmission-connected via a reversing gear set; The reversing gear set comprises a first coaxial sleeve (131) and a first coaxial gear (132) which are 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); It also includes a first steering assembly, which is arranged in the housing (1), and is used to selectively drive the first coaxial gear (132) to be transmission-engaged with the first coaxial sleeve (131); when the first coaxial gear (132) is transmission-engaged with the first gear (13), the power of the reversing gear set is transmitted to the output shaft (21), so as to realize the power reversal of the output shaft (21); It also includes a synchronization component, which drives and connects the two first steering components, and during the movement of one of the first steering components, the synchronization component can drive the other first steering component to move in the opposite direction; 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); The synchronization component comprises 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 axis (42), and a connecting drive rod (4331) being arranged at one end of the transmission rod (4), and a second transmission rack (433) being fixedly arranged at one end of the connecting drive rod (4331), and a reversing gear (431) being transmission-engaged on the second transmission rack (433), and a second fixed transverse axis (43) being fixedly arranged at one end of the reversing gear (431), and the second fixed transverse axis (43) being fixedly arranged on the housing (1), and a first driving rack being fixedly arranged on the inner side of the transmission rod (4), and the first driving rack being meshed with the reversing gear (431), and one end of the connecting drive rod (4331) being rotatably arranged on another rotating column (32).

2. A mechanical in-situ steering gearbox according to claim 1, characterized in that: The transmission gear set also includes a third gear (15) and a third coaxial gear (151) slidably sleeved on the shaft of the third gear (15); the third coaxial gear (151) selectively meshes with the third gear (15) through the drive of the second steering assembly.

3. A mechanical in-situ steering gearbox according to claim 2, characterized in that: The reversing gear set also includes 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 second steering assembly. 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.

4. A mechanical in-situ steering gearbox according to claim 3, characterized in that: The transmission gear set also includes a fourth gear (16) and a fourth coaxial gear (161) coaxially connected, and the fourth coaxial gear (161) is meshed with the output gear (17).

5. A mechanical in-situ steering gearbox according to claim 1, characterized in that: The side wall of the first coaxial gear (132) is fixedly provided with a latching tooth, and the first coaxial sleeve (131) is provided with a latching groove matched with the latching tooth.

6. A mechanical in-situ steering gearbox according to claim 3, characterized in that: The first steering assembly is connected to the second steering assembly through a linkage assembly. When the first steering assembly drives the reversing gear set to perform reversing transmission, the linkage assembly passively drives the second steering assembly to move, so that the third coaxial gear (151) is meshed with the brake gear (152).

7. A mechanical in-situ steering gearbox according to claim 6, characterized in that: The linkage assembly comprises a rotating column (32) rotatably arranged on a housing (1) and a connecting rod (5) rotatably arranged on the rotating column (32); the connecting rod (5) is transmission-connected to a second steering assembly.

8. A mechanical in-situ steering gearbox according to claim 7, characterized in that: The second steering assembly comprises a shifting rod (62) sleeved on the third coaxial gear (151), one end of the shifting rod (62) is fixedly connected to a shifting block (6), the connecting block is movably connected to the shifting block (6), and the shifting block (6) is rotatably arranged on the housing (1).

9. A mechanical in-situ steering gearbox according to claim 8, characterized in that: The invention also comprises a transmission assembly arranged in the connecting rod (5), the transmission assembly comprising a bearing column (321) fixedly arranged on the rotating block, a progressive gear (322) fixedly arranged on the bearing column (321), one end of the shifting block (6) being rotatably arranged on the bearing column (321), a transmission gear (51) being slidably arranged in the connecting rod (5), a bearing block (511) being fixedly arranged on the transmission gear (51), a bearing groove being provided at the lower end of the bearing block (511), and a shaft at one end of the shifting block (6) being supported in the bearing groove.

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