Towing vehicle with speed regulation

Abstract

The utility model provides a kind of tractor with speed regulating function, including frame and two respectively connecting in the walking mechanism of frame left and right sides;Every walking mechanism includes motor and track assembly;Motor is fixed on frame, and track assembly includes driving track wheel, driven track wheel and track, and driving track wheel and driven track wheel are rotatably connected with frame, and the both ends of track are respectively transmission connection ground sleeve in driving track wheel and driven track wheel;Every walking mechanism also includes gear shift assembly;Every track assembly is transmission connection with the output shaft of corresponding side motor by corresponding side gear shift assembly, and gear shift assembly is used to change the transmission speed ratio of track assembly and motor;The utility model is changed by the setting of gear shift assembly, and gear shift assembly can change the transmission speed ratio of track assembly and motor, so that motor can realize flexible adjustment of the torque of track assembly under the same speed, so that the tractive force of tractor can be flexibly adjusted.

Description

Technical Field

[0001] This utility model relates to the field of tractor technology, and more specifically, to a tractor with speed adjustment function. Background Technology

[0002] A tractor is a traction device used to traction objects. Currently, Chinese Patent Publication No. CN221820133U discloses a remote-controlled traction mechanical vehicle. In the structure of this remote-controlled traction mechanical vehicle, the motor is connected to the drive wheel and track through a single sprocket and chain. That is, the transmission speed ratio between the motor and the track is fixed, so it is impossible to flexibly adjust the torque of the track. In other words, the motor cannot flexibly adjust the traction force of the tractor at the same speed. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a tractor with speed regulation function. Through the setting of the gear shift assembly, the gear shift assembly can change the transmission speed ratio between the track assembly and the motor, so that the motor can flexibly adjust the torque of the track assembly at the same speed, so that the traction force of the tractor can be flexibly adjusted.

[0004] This utility model provides a tractor with speed regulation function, including a frame and two traveling mechanisms respectively connected to the left and right sides of the frame; each traveling mechanism includes a motor and a track assembly; the motor is fixed on the frame, and the track assembly includes a driving track wheel, a driven track wheel and a track, the driving track wheel and the driven track wheel are rotatably connected to the frame, and the two ends of the track are respectively driven and connected to the driving track wheel and the driven track wheel; each traveling mechanism also includes a shift assembly; each track assembly is driven and connected to the output shaft of the motor on the corresponding side through the shift assembly on the corresponding side, and the shift assembly is used to change the transmission speed ratio between the track assembly and the motor.

[0005] This invention, through the setting of the shift assembly, can change the transmission speed ratio between the track assembly and the motor, thereby enabling the motor to flexibly adjust the torque of the track assembly at the same speed, so that the traction force of the tractor can be flexibly adjusted.

[0006] In one possible implementation, each shift assembly includes at least two sets of transmission sprockets with different transmission ratios. Each set of transmission sprockets includes a driving sprocket, a driven sprocket, and a chain. The two ends of each chain are respectively connected to the driving sprocket and the driven sprocket in the corresponding transmission sprocket set. Each driving sprocket is coaxially sleeved on the outside of the output shaft of the motor on the corresponding side and rotatably connected to the output shaft. Each driven sprocket is coaxially fixed and connected to the driving track wheel on the corresponding side. Each shift assembly also includes a clutch assembly for driving the driving sprocket in one set of transmission sprockets to be connected to the output shaft of the motor.

[0007] In one possible implementation, the clutch assembly includes a synchronizing ring and a lever. The synchronizing ring is sleeved outside the output shaft of the motor and can move axially relative to the output shaft. The synchronizing ring is circumferentially limited to the output shaft of the motor. Each drive sprocket has several circumferentially evenly distributed meshing teeth on its sidewall. Both ends of the synchronizing ring have meshing grooves. The lever is slidably connected to the frame. One end of the lever is connected to the synchronizing ring, and the other end of the lever forms a control end. When the lever drives the synchronizing ring to move to one side, the meshing groove on one side of the synchronizing ring engages with the meshing teeth on one of the drive sprockets. When the lever drives the synchronizing ring to move to the other side, the meshing groove on the other side of the synchronizing ring engages with the meshing teeth on the other drive sprocket. When the lever drives the synchronizing ring to the middle position, the meshing grooves on both sides of the synchronizing ring disengage from the meshing teeth on the drive sprockets.

[0008] In one possible implementation, the outer wall of the motor output shaft is provided with spline teeth spaced circumferentially, each spline tooth extending along the axial direction of the motor output shaft, and the inner wall of the synchronizing ring is provided with spline grooves spaced circumferentially, each spline groove extending along the axial direction of the synchronizing ring, and each spline groove meshing with and slidingly engaging one of the spline teeth.

[0009] In one possible implementation, a guide rod is fixed on the frame, and a guide sleeve is fixed on the lever. The guide sleeve is sleeved on the guide rod and can move along the axial direction of the guide rod. The moving direction of the guide sleeve is parallel to the moving direction of the synchronizing ring.

[0010] In one possible implementation, a first opening groove is provided on one end of the lever, and an annular protrusion is coaxially provided on the outer peripheral wall of the synchronizing ring, with a portion of the outer edge of the annular protrusion located in the first opening groove.

[0011] In one possible implementation, the clutch assembly further includes a servo motor, with a column fixed to the drive end of the servo motor and a second opening slot provided on the other end of the lever, the column being vertically movably inserted into the second opening slot.

[0012] In one possible implementation, the clutch assembly also includes a control lever, the other end of which extends through the frame and out of the frame and is fixed to the control lever.

[0013] In one possible implementation, each traveling mechanism further includes a bracket, an adjusting screw, and an adjusting nut; the bracket is slidably connected to the frame and is used to drive the driven track wheel to approach or move away from the driving track wheel, the driven track wheel is rotatably connected to the outer end of the bracket, a stop block is fixed on the frame, one end of the adjusting screw is threadedly connected to the inner end of the bracket, the other end of the adjusting screw is movably inserted into the stop block, the adjusting nut is sleeved on the adjusting screw and threadedly connected to the adjusting screw, and the adjusting nut abuts against the side of the stop block facing the bracket.

[0014] In one possible implementation, a limiting frame is fixed on the frame, and a sliding cavity is formed between the limiting frame and the frame. A bracket passes through the sliding cavity and is slidably connected to the sliding cavity. Attached Figure Description

[0015] Figure 1 A three-dimensional structural diagram of the tractor unit when the technical solution of Embodiment 1 is adopted;

[0016] Figure 2 A three-dimensional structural diagram of the tractor vehicle after removing part of the frame, using the technical solution of Embodiment 1.

[0017] Figure 3 for Figure 2 A magnified structural diagram of point A in the middle;

[0018] Figure 4 A top view of the tractor unit after removing part of the frame, using the technical solution of Embodiment 1.

[0019] Figure 5 for Figure 4 A magnified structural diagram of point B in the middle;

[0020] Figure 6 A three-dimensional structural diagram of the tractor unit when the technical solution of Embodiment 2 is adopted;

[0021] Figure 7 A three-dimensional structural diagram of the tractor vehicle after removing part of the frame, using the technical solution of Embodiment 2. Detailed Implementation

[0022] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0023] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0024] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] Example 1

[0027] See Figure 1-5 As shown in the embodiment of this application, a tractor with speed regulation function is disclosed, including a frame 1 and two traveling mechanisms respectively connected to the left and right sides of the frame 1; each traveling mechanism includes a motor 2 and a track assembly 3; the motor 2 is fixed on the frame 1, and the track assembly 3 includes a driving track wheel 31, a driven track wheel 32 and a track 33. The driving track wheel 31 and the driven track wheel 32 are rotatably connected to the frame 1, and the two ends of the track 33 are respectively driven and connected to the driving track wheel 31 and the driven track wheel 32; each traveling mechanism also includes a shift assembly 4; each track assembly 3 is driven and connected to the output shaft 21 of the motor 2 on the corresponding side through the shift assembly 4 on the corresponding side, and the shift assembly 4 is used to change the transmission speed ratio between the track assembly 3 and the motor 2.

[0028] See you again Figures 2-5As shown, each shift assembly 4 includes at least two sets of transmission sprocket groups 5 with different transmission speed ratios. Each transmission sprocket group 5 includes a driving sprocket 51, a driven sprocket 52, and a chain 53. The two ends of each chain 53 are respectively connected to the driving sprocket 51 and the driven sprocket 52 in the corresponding transmission sprocket group 5. Each driving sprocket 51 is coaxially connected to the outside of the output shaft 21 of the motor 2 on the corresponding side and is rotatably connected to the output shaft 21. Each driven sprocket 52 is coaxially fixed and connected to the driving track wheel 31 on the corresponding side. Each shift assembly 4 also includes a clutch assembly 6, which is used to drive... One of the drive sprocket sets 5, the drive sprocket 51, is connected to the output shaft 21 of the motor 2. By using the above-mentioned shift assembly, when the drive track wheel is connected to the output shaft of the motor using drive sprocket sets with different transmission speed ratios, the shift assembly can change the transmission speed ratio between the track assembly and the motor. This allows the motor to flexibly adjust the torque of the track assembly at the same speed, so that the traction force of the tractor can be flexibly adjusted. The above-mentioned clutch assembly is used to drive the drive sprocket in one of the drive sprocket sets to be connected to the output shaft of the motor, so as to avoid interference between the drive sprocket sets.

[0029] See you again Figures 2-5As shown, the clutch assembly 6 includes a synchronizing ring 61 and a lever 62. The synchronizing ring 61 is sleeved on the outside of the output shaft 21 of the motor 2 and can move axially relative to the output shaft 21 of the motor 2. The synchronizing ring 61 is circumferentially limited to the output shaft 21 of the motor 2. Each drive sprocket 51 has several circumferentially evenly distributed meshing teeth 511 on its side wall. Both ends of the synchronizing ring 61 are provided with meshing grooves 611. The lever 62 is slidably connected to the frame 1. One end of the lever 62 is connected to the synchronizing ring 61, and the other end of the lever 62 forms a control end. When the lever 62 drives the synchronizing ring 61... After moving to one side, the engagement groove 611 on one side of the synchronizing ring 61 engages with the engagement teeth 511 on one of the drive sprockets 51. When the lever 62 drives the synchronizing ring 61 to move to the other side, the engagement groove 611 on the other side of the synchronizing ring 61 engages with the engagement teeth 511 on the other drive sprocket 51. When the lever 62 drives the synchronizing ring 61 to the middle position, the engagement grooves 611 on both sides of the synchronizing ring 61 disengage from the engagement teeth 511 on the drive sprockets 51. By using the above-mentioned clutch assembly, after the lever drives the synchronizing ring to move to one side... The meshing grooves on one side of the synchronizing ring can engage with the meshing teeth on one of the driving sprockets. At this time, the driving track wheel can be connected to the motor's output shaft via the transmission sprocket assembly containing that driving sprocket. After the lever drives the synchronizing ring to move to the other side, the meshing grooves on the other side of the synchronizing ring can engage with the meshing teeth on the other driving sprocket. At this time, the driving track wheel can be connected to the motor's output shaft via the transmission sprocket assembly containing that driving sprocket. When the lever drives the synchronizing ring to the middle position, the meshing grooves on both sides of the synchronizing ring can engage with the driving track wheel. When the meshing teeth on the sprocket disengage, the shift assembly is in neutral. It should be noted that in this embodiment, the transmission sprocket set has three sets, with two synchronizing rings and two levers. One end of each lever is connected to one of the synchronizing rings. One synchronizing ring controls whether two of the transmission sprocket sets are connected to the motor's output shaft, and the other synchronizing ring controls whether the remaining transmission sprocket set is connected to the motor's output shaft. Furthermore, when the tractor is moving, under the action of the clutch assembly, only one transmission sprocket set is connected to the motor's output shaft.

[0030] Splined teeth 211 are circumferentially spaced on the outer wall of the output shaft 21 of motor 2, each splined tooth 211 extending along the axial direction of the output shaft 21 of motor 2. Splined grooves 612 are circumferentially spaced on the inner wall of the synchronizing ring 61, each splined groove 612 extending along the axial direction of the synchronizing ring 61. Each splined groove 612 meshes with and slides with one of the splined teeth 211. With this structure, under the action of the splined teeth and splined grooves, the synchronizing ring can be reliably circumferentially limited with the output shaft of the motor, so that the output shaft of the motor can reliably drive the synchronizing ring to rotate. And since each splined groove slides with one of the splined teeth, when the lever pushes or pulls the synchronizing ring, the synchronizing ring can be reliably moved along the axial direction of the output shaft of the motor, so that the meshing groove on the synchronizing ring meshes with or disengages from the meshing tooth on the drive sprocket.

[0031] A guide rod 11 is fixed on the frame 1, and a guide sleeve 621 is fixed on the lever 62. The guide sleeve 621 is sleeved on the guide rod 11 and can move along the axial direction of the guide rod 11. The moving direction of the guide sleeve 621 is parallel to the moving direction of the synchronizing ring 61. With this structure, the lever can be reliably slidably connected to the frame, and since the moving direction of the guide sleeve is parallel to the moving direction of the synchronizing ring, the lever can reliably drive the synchronizing ring to move axially.

[0032] A first opening groove 622 is provided on one end of the lever 62, and an annular protrusion 613 is coaxially provided on the outer peripheral wall of the synchronizing ring 61. A portion of the outer edge of the annular protrusion 613 is located in the first opening groove 622. With this structure, when the lever moves, the lever can reliably drive the synchronizing ring to move axially, and when the synchronizing ring rotates, interference between the lever and the synchronizing ring can be avoided.

[0033] The clutch assembly 6 also includes a servo motor 63. A column 631 is fixed to the drive end of the servo motor 63, and a second opening slot 623 is provided on the other end of the lever 62. The column 631 is vertically and movably inserted into the second opening slot 623. Through the servo motor, and because the second opening slot on the lever movably engages with the column fixed to the drive end of the servo motor, when the drive end of the servo motor swings, it can reliably drive the lever to move relative to the vehicle frame, that is, it can reliably drive the synchronizer ring to move axially. Furthermore, under the action of the servo motor, the shift assembly can achieve automatic shifting. In addition, in this embodiment… The transmission sprocket assembly has three sets, with two synchronization rings and two levers, and two servo motors. One end of each lever is connected to one of the synchronization rings, and the other end is connected to the drive end of one of the servo motors via a second slot and a column. One servo motor controls whether the corresponding synchronization ring is connected to the drive sprocket in two of the transmission sprocket assemblies, while the other servo motor controls whether the corresponding synchronization ring is connected to the drive sprocket in the remaining transmission sprocket assembly. When the tractor is moving, the two servo motors only control one of the transmission sprocket assemblies to be connected to the output shaft of the motor.

[0034] Each traveling mechanism also includes a bracket 71, an adjusting screw 72, and an adjusting nut 73. The bracket 71 is slidably connected to the frame 1 and is used to drive the driven track wheel 32 to move closer to or away from the driving track wheel 31. The driven track wheel 32 is rotatably connected to the outer end of the bracket 71. A stop block 74 is fixed on the frame 1. One end of the adjusting screw 72 is threadedly connected to the inner end of the bracket 71, and the other end of the adjusting screw 72 is movably inserted into the stop block 74. The adjusting nut 73 is sleeved on the adjusting screw 72 and threadedly connected to the adjusting screw 72. The adjusting nut 73 abuts against the side of the stop block 74 facing the bracket 71. With this structure, when the adjusting screw is rotated to one side, the bracket can move away from the frame under the cooperation of the adjusting screw and the bracket. Moving the adjustment screw to one side increases the tension of the driven track wheel on the track. Turning the adjustment screw to the other side, in conjunction with the screw and the bracket, moves the bracket closer to the chassis, reducing the tension of the driven track wheel on the track. This allows users to freely adjust the track tension according to their needs. Furthermore, when replacing the track, moving the bracket closer to the chassis reduces the track tension, facilitating the detachment of the track from the drive and driven track wheels. Similarly, it facilitates the installation of a new track onto the drive and driven track wheels. After track replacement, moving the bracket away from the chassis restores track tension.

[0035] A limiting frame 12 is fixed on the frame 1, and a sliding cavity 13 is formed between the limiting frame 12 and the frame 1. The bracket 71 passes through the sliding cavity 13 and is slidably connected to the sliding cavity 13. With this structure, the bracket can be reliably slidably connected to the frame under the sliding cooperation between the bracket and the sliding cavity.

[0036] Example 2

[0037] See Figure 6-7 As shown, unlike Embodiment 1, the clutch assembly 6 also includes a control handle 64. The other end of the lever 62 extends through the frame 1 and out of the frame 1, and is fixed to the control handle 64. With the control handle, the lever can be easily pushed and pulled, thereby facilitating the lever to drive the synchronous ring to move axially. Under the action of the control handle, the gear shift assembly can achieve manual gear shifting. In this embodiment, there are three sets of transmission sprockets, two synchronous rings and two levers, and two control handles. One end of each lever is connected to one of the synchronous rings, and the other end of each lever is fixed to one of the control handles. One control handle is used to control whether the corresponding synchronous ring is connected to the drive sprocket in one of the two sets of transmission sprockets, and the other control handle is used to control whether the corresponding synchronous ring is connected to the drive sprocket in the remaining set of transmission sprockets. When the tractor moves, the two control handles only control one set of transmission sprockets to be connected to the output shaft of the motor.

[0038] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A tractor with speed regulation function, comprising a frame (1) and two traveling mechanisms respectively connected to the left and right sides of the frame (1); each traveling mechanism includes a motor (2) and a track assembly (3); the motor (2) is fixed on the frame (1), and the track assembly (3) includes a driving track wheel (31), a driven track wheel (32), and a track (33), wherein the driving track wheel (31) and the driven track wheel (32) are rotatably connected to the frame (1), and the two ends of the track (33) are respectively drivenly connected to the driving track wheel (31) and the driven track wheel (32); characterized in that: Each of the walking mechanisms also includes a shift assembly (4); each of the track components (3) is connected to the output shaft (21) of the motor (2) on the corresponding side via the shift assembly (4) on the corresponding side, and the shift assembly (4) is used to change the transmission speed ratio between the track component (3) and the motor (2).

2. The tractor with speed regulation function according to claim 1, characterized in that: Each of the shifting assemblies (4) includes at least two sets of transmission sprocket groups (5) with different transmission speed ratios. Each set of transmission sprocket groups (5) includes a driving sprocket (51), a driven sprocket (52), and a chain (53). The two ends of each chain (53) are respectively connected to the driving sprocket (51) and the driven sprocket (52) in the corresponding transmission sprocket group (5). Each driving sprocket (51) is coaxially connected to the outside of the output shaft (21) of the motor (2) on the corresponding side and is rotatably connected to the output shaft (21). Each driven sprocket (52) is coaxially fixed and connected to the driving track wheel (31) on the corresponding side. Each of the shifting assemblies (4) also includes a clutch assembly (6). The clutch assembly (6) is used to drive the driving sprocket (51) in one of the transmission sprocket groups (5) to be connected to the output shaft (21) of the motor (2).

3. The tractor with speed regulation function according to claim 2, characterized in that: The clutch assembly (6) includes a synchronizing ring (61) and a lever (62); the synchronizing ring (61) is sleeved on the outside of the output shaft (21) of the motor (2) and can move axially relative to the output shaft (21) of the motor (2); the synchronizing ring (61) is circumferentially limited to the output shaft (21) of the motor (2); each drive sprocket (51) has several circumferentially evenly distributed meshing teeth (511) on its side wall; both ends of the synchronizing ring (61) are provided with meshing grooves (611); the lever (62) is slidably connected to the frame (1); one end of the lever (62) is connected to the synchronizing ring (61); the lever (62) has a meshing groove (611) at both ends; ... The other end forms a control end; when the lever (62) drives the synchronous ring (61) to move to one side, the meshing groove (611) on one side of the synchronous ring (61) meshes with the meshing teeth (511) on one of the driving sprockets (51). When the lever (62) drives the synchronous ring (61) to move to the other side, the meshing groove (611) on the other side of the synchronous ring (61) meshes with the meshing teeth (511) on the other driving sprocket (51). When the lever (62) drives the synchronous ring (61) to move to the middle position, the meshing grooves (611) on both sides of the synchronous ring (61) disengage from the meshing teeth (511) on the driving sprocket (51).

4. The tractor with speed regulation function according to claim 3, characterized in that: The outer wall of the output shaft (21) of the motor (2) is provided with spline teeth (211) spaced circumferentially. Each spline tooth (211) extends along the axial direction of the output shaft (21) of the motor (2). The inner wall of the synchronizing ring (61) is provided with spline grooves (612) spaced circumferentially. Each spline groove (612) extends along the axial direction of the synchronizing ring (61). Each spline groove (612) meshes with and slides with one of the spline teeth (211).

5. The tractor with speed regulation function according to claim 3, characterized in that: A guide rod (11) is fixed on the frame (1), and a guide sleeve (621) is fixed on the lever (62). The guide sleeve (621) is sleeved on the guide rod (11) and can move along the axial direction of the guide rod (11). The moving direction of the guide sleeve (621) is parallel to the moving direction of the synchronizing ring (61).

6. The tractor with speed regulation function according to claim 3, characterized in that: The lever (62) has a first opening groove (622) at one end, and the synchronizing ring (61) has an annular protrusion (613) coaxially arranged on the outer peripheral wall, with a portion of the outer edge of the annular protrusion (613) located in the first opening groove (622).

7. The tractor with speed regulation function according to claim 3, characterized in that: The clutch assembly (6) also includes a servo motor (63), a column (631) is fixed on the drive end of the servo motor (63), and a second opening slot (623) is provided on the other end of the lever (62). The column (631) is vertically movably inserted into the second opening slot (623).

8. The tractor with speed regulation function according to claim 3, characterized in that: The clutch assembly (6) also includes a control handle (64), the other end of which extends through the frame (1) and out of the frame (1) and is fixed to the control handle (64).

9. The tractor with speed regulation function according to any one of claims 1-8, characterized in that: Each of the aforementioned walking mechanisms also includes a bracket (71), an adjusting screw (72), and an adjusting nut (73); the bracket (71) is slidably connected to the frame (1) and is used to drive the driven track wheel (32) to approach or move away from the driving track wheel (31), the driven track wheel (32) is rotatably connected to the outer end of the bracket (71), a stop block (74) is fixed on the frame (1), one end of the adjusting screw (72) is threadedly connected to the inner end of the bracket (71), the other end of the adjusting screw (72) is movably inserted into the stop block (74), the adjusting nut (73) is sleeved on the adjusting screw (72) and threadedly connected to the adjusting screw (72), and the adjusting nut (73) abuts against the side of the stop block (74) facing the bracket (71).

10. The tractor with speed regulation function according to claim 9, characterized in that: A limiting frame (12) is fixed on the frame (1), and a sliding cavity (13) is formed between the limiting frame (12) and the frame (1). The bracket (71) passes through the sliding cavity (13) and is slidably connected to the sliding cavity (13).

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