Steering device of gearbox, gearbox and crawler

Abstract

The utility model discloses a steering device of a gearbox, which comprises a box body, a first output shaft, a second output shaft, a power transmission shaft and a transmission structure, the first output shaft and the second output shaft are arranged on two sides of the box body, the power transmission shaft and the transmission structure are rotatably arranged in the box body, and a first power transmission component and a second power transmission component are arranged on the power transmission shaft. The first power transmission assembly is arranged on the first output shaft and used for driving the first output shaft and the second output shaft to conduct transmission, and the transmission structure is in transmission connection with the first output shaft and the first power transmission assembly so that the first power transmission assembly can drive the first output shaft to reversely rotate relative to the second output shaft; and by arranging the transmission mechanism, the rotation of the first output shaft and the rotation of the second output shaft are opposite, so that the stability of the crawler during steering is improved.

Description

Technical Field

[0001] The utility model relates to the field of gearboxes, in particular to a steering device of a gearbox, a gearbox and a crawler vehicle. Background Art

[0002] Compared with wheels, crawler tracks have a larger relative area in contact with the ground, and the force per unit area is small, so the vehicle is not easy to sink. Therefore, it will not damage the plow bottom layer and has good paddy field walking performance, so it is widely used in agricultural machinery, such as harvesters, rotary tillers, etc.

[0003] Due to the large contact area of ​​the crawler tracks, the turning resistance is greater than when running in a straight line when working in the field. When turning, agricultural machinery generally adopts the method of braking while turning. At this time, its forward driving force is only half of that when running in a straight line, while the resistance is twice that of running in a straight line. The stability is poor and it is easy to cause the crawler tracks to slip. Once slipping, the crawler tracks will discharge the soil backwards, causing the whole machine to gradually sink, and eventually causing the agricultural machinery to sink. Utility Model Content

[0004] The utility model aims to provide a steering device for a gearbox to improve the stability of a crawler vehicle when turning.

[0005] The utility model is realized through the following technical solutions.

[0006] A steering device of a gearbox comprises a housing, a first output shaft and a second output shaft respectively arranged on both sides of the housing, a power transmission shaft rotatably arranged in the housing, and a transmission structure, wherein the power transmission shaft is provided with a first power transmission component and a second power transmission component, and is respectively used to drive the first output shaft and the second output shaft to rotate, and the transmission structure transmission connects the first output shaft and the first power transmission component so that the first power transmission component can drive the first output shaft to rotate in the opposite direction relative to the second output shaft.

[0007] As a further improvement of the present invention, the first power transmission component is a double sliding gear, including a first power transmission gear, the transmission structure includes a transmission shaft and a first transmission gear and a second transmission gear arranged on the transmission shaft, the first output shaft is provided with a first output gear meshing with the second transmission gear, and the first power transmission gear is meshed with the first transmission gear.

[0008] As a further improvement of the present invention, the double sliding gear also includes a second power transmission gear, and the double sliding gear is connected to a steering control assembly, and the steering control assembly is rotatably mounted on the box body. When the steering control assembly rotates, it can drive the double sliding gear to slide axially along the power transmission shaft so that the second power transmission gear is meshed with the first output gear or the first power transmission gear is meshed with the first transmission gear.

[0009] As a further improvement of the present invention, the steering assembly includes an operating rod and a shift fork, the operating rod is rotatably mounted on the box body, one end of the shift fork is movably connected to the operating rod, and the other end is connected to the double sliding gear.

[0010] As a further improvement of the present invention, a first connecting member is provided between the first power transmission gear and the second power transmission gear, the first connecting member is sleeved on the power transmission shaft, and a groove matching the shift fork is provided on the first connecting member.

[0011] As a further improvement of the present invention, a connecting portion is provided between the first transmission gear and the second transmission gear, and the connecting portion is sleeved on the transmission shaft.

[0012] As a further improvement of the present invention, the first power transmission gear and the first transmission gear have the same number of teeth, and the second transmission gear and the first output gear have the same number of teeth.

[0013] As a further improvement of the present invention, the second power transmission assembly includes a third power transmission gear, and the second output shaft is provided with a second output gear meshing with the third power transmission gear.

[0014] The utility model also provides a gearbox, comprising the steering device of the gearbox in the above technical solution.

[0015] The utility model also provides a crawler vehicle, comprising the gearbox in the above technical solution, and at least two crawlers, wherein one crawler is connected to the first output shaft, and the other crawler is connected to the second output shaft.

[0016] Beneficial effects of the utility model

[0017] The utility model provides a steering device of a gearbox. By arranging a transmission structure that is transmission-connected with a first output shaft and a first power transmission component, the rotation direction of the first output shaft is changed, so that the rotation direction of the first output shaft is opposite to the rotation direction of the second output shaft, thereby driving the crawler tracks respectively connected to the first output shaft and the second output shaft to move in opposite directions. Compared with the prior art, on the one hand, it helps to improve the stability of the crawler tracks during steering, and helps the crawler vehicle to pass through uneven terrain or areas with many obstacles more smoothly. On the other hand, it can reduce the steering radius, so that the steering of the crawler vehicle is more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following is a detailed description of the preferred implementation examples of the present invention with reference to the accompanying drawings to help understand the purpose and advantages of the present invention, wherein:

[0019] Figure 1 It is a front schematic diagram of the gearbox in the utility model;

[0020] Figure 2 It is a reverse schematic diagram of the gearbox in the utility model;

[0021] Figure 3 It is a structural diagram of the connection between the steering control assembly and the double sliding gear;

[0022] Figure 4 Schematic diagram of the internal structure of the gearbox;

[0023] Figure 5 is a schematic diagram of the transmission structure;

[0024] In the figure:

[0025] 1. Housing; 2. First output shaft; 21. First output gear; 3. Second output shaft; 32. Second output gear; 4. Power transmission shaft; 41. Double sliding gear; 411. First power transmission gear; 412. Second power transmission gear; 422. Third power transmission gear; 5. Transmission structure; 51. Transmission shaft; 52. First transmission gear; 53. Second transmission gear; 54. Connecting part; 6. Steering control assembly; 61. Operating lever; 62. Shift fork. DETAILED DESCRIPTION

[0026] The utility model is further described in detail below based on the accompanying drawings and implementation cases.

[0027] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. The words "inside" and "outside" refer to the direction toward or away from the geometric center of a specific component, respectively. They are relative concepts, and therefore may change accordingly according to different locations and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0028] Embodiment 1:

[0029] This embodiment provides a steering device for a gearbox, referring to Figures 1 to 4 , including a housing 1, a first output shaft 2 and a second output shaft 3 symmetrically arranged on both sides of the housing 1, a power transmission shaft 4 and a transmission structure 5 for transmitting power to the first output shaft 2 and the second output shaft 3, a first power transmission assembly and a second power transmission assembly are respectively arranged on both ends of the power transmission shaft 4, and the first power transmission assembly and the second power transmission assembly are respectively matched with the first output shaft 2 and the second output shaft 3 in transmission, so that the power transmission shaft 4 can drive the first output shaft 2 and the second output shaft 3 to rotate when rotating, and in addition, the transmission structure 5 is connected to the first power transmission assembly and the first output shaft 2, which can change the rotation direction of the first output shaft 2 so that the first The output shaft and the second output shaft 3 rotate in opposite directions. During specific use, the first output shaft 2 in the device is connected to a crawler track, and the second output shaft 3 is connected to a crawler track. When the crawler vehicle needs to turn, the power transmission shaft 51 in the box body 1 is controlled to rotate, driving the first output shaft 2 and the second output shaft 3 to rotate in opposite directions, thereby driving the two crawlers of the crawler vehicle to move in opposite directions to achieve the turning of the crawler vehicle. Compared with the prior art, on the one hand, it helps to improve the stability of the crawler track during turning, helping the crawler vehicle to pass through uneven terrain or areas with more obstacles more smoothly, and on the other hand, it can reduce the turning radius, making the steering of the crawler vehicle more flexible.

[0030] Specifically, the first power transmission assembly is configured as a double sliding gear 41, which is splined to the power transmission shaft 4, the double sliding gear 41 includes a first power transmission gear 411, the transmission structure 5 includes a transmission shaft 51 and a first transmission gear 52 and a second transmission gear 53 provided on the transmission shaft 51, the first output shaft 2 is provided with a first output gear 21 meshing with the second transmission gear 53, the first power transmission gear 411 meshes with the first transmission gear 52, when the first power transmission gear 411 rotates, it drives the first transmission gear 52 to rotate, and the second transmission gear 53 drives the first output gear 21 to rotate. At the same time, the second power transmission assembly includes a third power transmission gear 422, and the second output shaft 3 is provided with a second output gear 22 meshing with the third power transmission gear.

[0031] It can be understood that when the first output gear 21 is driven to rotate by the second transmission gear 53, the rotation direction of the first output gear 21 is the same as that of the first power transmission gear 411, that is, the rotation direction of the first output gear 21 and the second output gear 22 are opposite, and the first output shaft 2 and the second output shaft 3 rotate in opposite directions.

[0032] Furthermore, the double sliding gear 41 also includes a second power transmission gear 412. The double sliding gear 41 is connected to a steering control assembly 6. The steering control assembly 6 is rotatably mounted on the housing 1. When the steering control assembly 6 rotates, it can drive the double sliding gear 41 to slide along the axial direction of the power transmission shaft 4, thereby adjusting the positions of the first power transmission gear 411 and the second power transmission gear 412 on the power transmission shaft 4, so that the second power transmission gear 412 is meshed with the first output gear 21 or the first power transmission gear 411 is meshed with the first transmission gear 52. When the second power transmission gear 412 is meshed with the first output gear 21, the first power transmission gear 411 is disengaged, and the first output shaft 2 and the second output shaft 3 rotate in the same direction. This structure is used for the normal travel state of the crawler vehicle; when the first power transmission gear 411 is meshed with the first transmission gear 52, the second power transmission gear 412 is disengaged, and the first output shaft 2 and the second output shaft 3 rotate in the opposite direction. This structure is used for steering the crawler vehicle.

[0033] The steering assembly includes an operating rod 61 and a fork 62. The operating rod 61 is rotatably installed on the box body 1. One end of the fork 62 is movably connected to the operating rod 61, and the other end is connected to the double sliding gear 41. The double sliding gear 41 is provided with a groove matching the fork 62 to ensure that the double gear 41 can slide accordingly under the push of the fork 62. In actual use, the operating rod 61 can be rotated to enable the fork 62 to push the double sliding gear 41 to move on the power transmission shaft 4.

[0034] In this embodiment, the first power transmission gear 411 is set to have the same number of teeth as the first transmission gear 52, the second transmission gear 53 is set to have the same number of teeth as the first output gear 21, and the third power transmission gear 422 is set to have the same number of teeth as the second output gear 31. When the first output shaft 2 and the second output shaft 3 rotate in opposite directions, the rotation speeds of the two are the same, thereby realizing the on-the-spot turning of the crawler vehicle.

[0035] In this embodiment, a connecting portion 54 is provided between the first transmission gear 52 and the second transmission gear 53. The connecting portion 54 is sleeved on the second transmission shaft 51. The connecting portion 54 forms an integral structure between the first transmission gear 52 and the second transmission gear 53, so that the first transmission gear 52 can directly drive the second transmission gear 53 to rotate when rotating, which helps to improve the transmission efficiency.

[0036] Example 2

[0037] This embodiment provides a gearbox, including a steering device of a gearbox in the above technical solution.

[0038] Embodiment 3:

[0039] This embodiment provides a tracked vehicle, including the gearbox in the above technology, and also includes at least two tracks, one of which is connected to the first output shaft 2, and the other is connected to the second output shaft 3.

[0040] Finally, it should be noted that the above implementation cases are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the above implementation cases, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above implementation cases, or replace some of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the implementation cases of the utility model.

Claims

1. A steering device for a gearbox, characterized in that: The invention comprises a housing (1), a first output shaft (2) and a second output shaft (3) respectively arranged on both sides of the housing (1), a power transmission shaft (4) rotatably arranged in the housing (1), and a transmission structure (5), wherein the power transmission shaft (4) is provided with a first power transmission component and a second power transmission component, and is respectively used to drive the first output shaft (2) and the second output shaft (3) to rotate, and the transmission structure (5) transmission-connects the first output shaft (2) and the first power transmission component, so that the first output shaft (2) rotates in the opposite direction relative to the second output shaft (3).

2. A steering device for a gearbox according to claim 1, characterized in that: The first power transmission component is a double sliding gear (41) comprising a first power transmission gear (411); the transmission structure (5) comprises a transmission shaft (51) and a first transmission gear (52) and a second transmission gear (53) arranged on the transmission shaft (51); the first output shaft (2) is provided with a first output gear (21) meshing with the second transmission gear (53); and the first power transmission gear (411) meshes with the first transmission gear (52).

3. A steering device for a gearbox according to claim 2, characterized in that: The double sliding gear (41) further comprises a second power transmission gear (412). The double sliding gear (41) is connected to a steering control assembly (6). The steering control assembly (6) is rotatably mounted on the housing (1). When the steering control assembly (6) rotates, it can drive the double sliding gear (41) to slide axially along the power transmission shaft (4) so ​​that the second power transmission gear (412) meshes with the first output gear (21) or the first power transmission gear (411) meshes with the first transmission gear (52).

4. A steering device for a gearbox according to claim 3, characterized in that: The steering control assembly (6) comprises an operating rod (61) and a shift fork (62); the operating rod (61) is rotatably mounted on the housing (1); one end of the shift fork (62) is movably connected to the operating rod (61), and the other end is connected to the double-linked sliding gear (41).

5. A steering device for a gearbox according to claim 4, characterized in that: The double sliding gear (41) is provided with a groove matching the shift fork (62).

6. A steering device for a gearbox according to claim 2, characterized in that: A connecting portion (54) is provided between the first transmission gear (52) and the second transmission gear (53), and the connecting portion (54) is sleeved on the transmission shaft (51).

7. A steering device for a gearbox according to claim 2, characterized in that: The first power transmission gear (411) has the same number of teeth as the first transmission gear (52), and the second transmission gear (53) has the same number of teeth as the first output gear (21).

8. The steering device of a gearbox according to claim 1, characterized in that: The second power transmission component comprises a third power transmission gear (413), and the second output shaft (3) is provided with a second output gear (31) meshing with the third power transmission gear (413).

9. A gearbox, characterized in that: A steering device comprising a gearbox as claimed in any one of claims 1 to 8.

10. A crawler vehicle, characterized in that: A gearbox comprising the method of claim 9, further comprising at least two tracks, wherein one track is connected to the first output shaft (2), and the other track is connected to the second output shaft (3).

Images