Snowfield motorcycle frame

Abstract

The invention discloses a snowfield motorcycle frame, and belongs to the technical field of snowfield motorcycle structures, the snowfield motorcycle frame comprises a track assembly, a rear wheel carrier is arranged on the track assembly, the rear wheel carrier is rotatably connected to the track assembly, the rear wheel carrier comprises a swing part and a rotating wheel, the swing part is rotatably connected with the track assembly, and the rotating wheel is rotatably connected with the swing part. The rotating wheel is arranged at the end, away from the vehicle rail assembly, of the swing piece, and a lock catch assembly is arranged between the swing piece and the vehicle rail assembly. When the snowmobile is located in deep snow, the height of the snowmobile is increased by swinging the rear wheel carrier, so that the guide surface of the crawler belt on the wheel carrier can be changed and an inclined surface is formed, the snowmobile can be conveniently reversed to be separated from a deep snow pit, and in the normal running process, the height of the snowmobile can be reduced by swinging the rear wheel carrier. The contact area of the crawler belt on the rotating wheel and the ground can be increased, and the driving stability and the safety coefficient are improved.

Description

Technical Field

[0001] The present invention relates to a frame structure, and more particularly to a snowmobile frame. Background Art

[0002] Snowmobiles can be used as a means of transportation on the snow, and can also be used as a tool for outdoor snow sports. When driving a snowmobile outdoors, on the one hand, it is necessary to have a good starting effect, especially in heavy snow weather, the bottom of the snowmobile is easily buried, and the snowmobile cannot be pulled out of the snow pit at this time. On the other hand, the stability of the snowmobile must be ensured to ensure safety in driving in rainy and snowy weather.

[0003] For example: Chinese patent announcement number CN115743379A, publication date March 7, 2023, invention name is a snowmobile with self-snow removal function, the application discloses a snowmobile frame structure, including a snowmobile frame, a diesel engine on one side of the bottom of the snowmobile frame is bolted with a pulley transmission assembly, the surface of the pulley transmission assembly is sleeved with a traveling track, and the threaded transmission rod is driven to rotate by turning on the driving motor, so that the threaded sleeve is threadedly transmitted with the threaded transmission rod, and then slides on the surface of the threaded transmission rod, and then the threaded sleeve drives the scraper plate to slide on the top of the traveling track, so that when the snowmobile is traveling, the pulley transmission assembly drives the traveling track to rotate and the scraper plate can remove the snow or silt attached to the surface. The setting realizes the effect of automatically processing the snow on the snowmobile, avoiding the evaporation of snow to form water and soil mixed to form mud, which will clump and harden after evaporation, thereby affecting the movement and grip of the track and improving the driving stability of the snowmobile. However, the frame structure of the snowmobile is difficult to travel in deep snow and has a poor starting effect. Summary of the invention

[0004] The present invention overcomes the problems of poor starting effect and difficult driving of existing snowmobiles in deep snow, and provides a snowmobile frame. In this solution, a group of swing wheels are extended from the snowmobile frame, so that the guidance of the snowmobile track can be changed, which is beneficial for the snowmobile to start and travel in deep snow.

[0005] In order to solve the above technical problems, the present invention adopts the following technical scheme: a snowmobile frame, including a track assembly, a rear wheel frame is arranged on the track assembly, the rear wheel frame is rotatably connected to the track assembly, the rear wheel frame includes a swinging member and a rotating wheel, the swinging member is rotatably connected to the track assembly, the rotating wheel is arranged at one end of the swinging member away from the track assembly, and a locking member is arranged between the swinging member and the track assembly. In this scheme, the rear wheel frame is arranged at the rear of the snowmobile frame, and the rear wheel frame can swing up and down. When the snowmobile is in deep snow, the rear wheel frame is swung to increase its height, so that the guide surface of the track on the wheel frame can be changed to present an inclined surface, so that the snowmobile can be reversed to get out of the deep snow pit. In the normal driving process, the rear wheel frame can also be swung to reduce its height, so that the contact area between the track on the rotating wheel and the ground can be increased, thereby improving the driving stability and safety factor. The track assembly and the rotating wheel are used to install the crawler structure, and the locking assembly on the swing member and the track assembly can fix the swing member relative to the track assembly to maintain the position of the rear wheel frame.

[0006] Preferably, the track assembly includes two parallel tracks, and a protrusion is provided on one side of the track close to the rear wheel frame, and the protrusion is rotatably connected to the rear wheel frame. In this solution, the protrusion is provided at the rear side of the track to raise the installation position of the rear wheel frame. When the rear wheel frame swings downward, the rear wheel frame, the track and the ground can form a triangle, which improves the transmission stability of the crawler track. When the rear wheel frame swings upward, the end position of the rear wheel frame can be raised higher, which is more conducive to the inclined surface guidance formed by the crawler track, and is convenient for reversing the snowmobile.

[0007] Preferably, the swing member is provided with an adjustment groove on one side away from the protrusion, and the rotating wheel is arranged in the adjustment groove. The swing member is also provided with an adjustment groove, through which the installation position of the rotating wheel can be changed, thereby adjusting the installation tightness of the crawler track.

[0008] Preferably, the lock assembly comprises a lock rod and a lock block, wherein the lock rod is connected to the swing member, and both ends of the lock rod are rotatably connected to the lock block, and positioning holes are provided on the lock block and the swing member. The lock rod is used to connect the two lock blocks and the swing member, and connect the lock block and the swing member together, and the positioning holes on the lock block and the swing member can fix the locking position of the lock block on the swing member, so that the lock block and the swing member remain stationary, thereby fixing the position of the rear wheel frame.

[0009] Preferably, the protrusion is provided with a receiving groove adapted to the locking block, and stop blocks are provided at both ends of the receiving groove. The receiving groove can provide an installation position for the locking block, and can also provide an installation position for the stop block, so that the locking block can cooperate with the stop block for braking.

[0010] Preferably, the vehicle further comprises a suspension assembly, wherein an elastic member is provided on the rear wheel frame, a preload cam is provided on the locking rod, one end of the elastic member overlaps with the preload cam, and the other end of the elastic member overlaps with the suspension assembly. The elastic member can apply more or less preload to the rear wheel frame. When the elastic force of the elastic member increases, the preload acting on the rear wheel frame increases, which can effectively increase the track surface on the ground, reduce the lifting amount of the rear wheel frame, and lower the center of gravity; when the elastic force of the elastic member decreases, the preload acting on the rear wheel frame decreases, which can increase the lifting amount of the rear wheel frame and improve the reversing performance, especially in deep snow.

[0011] Preferably, the suspension assembly is arranged on the track assembly, and the suspension assembly includes a main shaft, and track wheels are arranged on the main shaft and the track. The suspension assembly can play a shock-absorbing and buffering effect on the vehicle body, and the suspension assembly is located above the track assembly. The track wheels on the main shaft and the track wheels on the track assembly form a triangular distribution as a whole. When the track is installed, the track also forms a triangular shape, thereby improving the stability of the snowmobile.

[0012] Preferably, a forearm adjustment frame is provided on the side of the track away from the rear wheel frame, the forearm adjustment frame includes a swing frame, and a strap is provided between the swing frame and the track. The swing frame on the forearm adjustment frame can adaptively adjust the stability of the front side of the vehicle body according to the driving condition of the vehicle body, and the strap is used to restrict the swing amplitude of the swing frame from being too large.

[0013] Preferably, an intermediate spring is provided between the swing frame and the vehicle rail. The intermediate spring is used to support the swing frame and exert elastic force on the swing frame to prevent the swing frame from colliding with the vehicle rail when the swing frame swings to a low position and to prevent the swing amplitude of the swing frame from being too large when the swing frame swings to a high position.

[0014] Preferably, the suspension assembly is rotatably connected to the forearm adjustment frame. The forearm adjustment frame and the suspension assembly are linked to each other and can transmit the effect of their own deformation to each other. When the forearm adjustment frame swings, the suspension assembly can be deformed and displaced in the vertical direction to achieve the effect of buffering and shock absorption of the suspension assembly. When the suspension assembly is deformed and displaced, the forearm adjustment frame is adjusted to improve the performance of the front side of the vehicle body.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) a set of swing wheels are extended from the snowmobile frame, thereby changing the direction of the snowmobile track, which is beneficial for the snowmobile to start and move in deep snow; (2) the suspension assembly can greatly improve the shock absorption effect of the snowmobile and improve the driving experience; (3) a clamp arm adjustment frame is also provided, so that the snowmobile is more balanced during driving and the driving safety is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an overall schematic diagram of the frame of the present invention.

[0017] Figure 2 It is a schematic diagram of the vehicle track assembly and the rear wheel frame of the present invention.

[0018] Figure 3 It is a front view of the vehicle track assembly and the rear wheel frame of the present invention.

[0019] Figure 4 for Figure 3 A is an enlarged schematic diagram.

[0020] Figure 5 A schematic diagram of another state of the lock component.

[0021] Figure 6 It is a schematic axonometric view of the entire frame of the present invention.

[0022] Figure 7 It is a cross-sectional view of the frame of the present invention.

[0023] In the figure: 1. rear wheel frame, 2. swing member, 3. rotating wheel, 4. locking assembly, 4.1. locking rod, 4.2. locking block, 4.2.1. locking rod, 4.2.2. locking block, 5. vehicle rail, 6. raised part, 7. adjustment groove, 8. positioning hole, 9. receiving groove, 10. stop block, 11. suspension assembly, 12. elastic member, 13. preload cam, 14. main shaft, 15. track wheel, 16. front arm adjustment frame, 17. swing frame, 18. belt , 19. middle spring, 20. first rotating shaft, 21. first connecting shaft, 22. pin, 23. rectangular block, 24. top rod, 25. connecting rod, 26. adjusting support rod, 27. shock absorber, 28. regulator, 29. second torsion spring, 30. first hinge part, 31. second hinge part, 32. first rod, 33. adjusting rod, 34. supporting main board, 35. supporting frame, 36. second rod, 37. third rod, 38. fourth rod. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0025] Example 1: Figures 1 to 7A snowmobile frame shown includes a track assembly, which is formed by two tracks 5 arranged in parallel, and a plurality of connecting rods are arranged between the two tracks 5 to connect the two tracks 5 together to form a stable track assembly. A rear wheel frame 1 is arranged at the rear side of the track assembly, and the rear wheel frame 1 includes two swinging members 2, and the swinging members 2 are plate-shaped structures. A first rotating shaft 20 is arranged at one end of the swinging member 2, and the first rotating shaft 20 is connected to the rear end of the track 5 and also connects the two swinging members 2, so that the two swinging members 2 are connected together and can swing synchronously, and a first connecting shaft 21 is arranged at the other end of the swinging member 2, and the first connecting shaft 21 also connects the two swinging members 2, so that the swinging members 2 are more stable, and rotating wheels 3 are arranged at both ends of the first connecting shaft 21, specifically, two rotating wheels 3 are arranged at one end of the first connecting shaft 21, and the first connecting shaft 21 penetrates the swinging member 2, and the two rotating wheels 3 are respectively located on the first connecting shaft 21 and on both sides of the swinging member 2, and similarly, the other end of the first connecting shaft 21 is also arranged in the same way. The rear wheel frame 1 swings around the first rotating shaft 20, so that the position of the rotating wheel 3 on the swinging member 2 is raised or lowered, and a track (not shown in the figure) is mounted on the rotating wheel 3, so that the shape of the track on the rear side of the snowmobile can be changed, so that the track becomes an inclined surface. The inclined surface has a guiding effect, which is beneficial to the reversing of the snowmobile in deep snow and can effectively cope with driving on deep snow road conditions.

[0026] A locking assembly 4 is also provided on the two swinging members 2, and the locking assembly 4 can lock the swinging members 2 and fix them on the track assembly. Specifically, the locking assembly 4 includes a locking rod 4.1 and two locking blocks 4.2. The locking rod 4.1 is arranged between the two swinging members 2 and close to one side of the track 5. Both ends of the locking rod 4.1 pass through the swinging members 2. Both ends of the locking rod 4.1 are also rotatably connected to a locking block 4.2 respectively, and the locking block 4.2 can lock the position of the swinging member 2. Specifically, positioning holes 8 are provided on the locking block 4.2 and the swinging member 2, wherein there is one positioning hole on the locking block 4.2, and the positioning hole on the locking block 4.2 is used to install a pin 22, and a spring is provided on the outside of the pin 22 and is located inside the locking block 4.2, and the spring can automatically reset and lock the pin 22; there are two positioning holes on the swinging member 2, and the position of the locking block 4.2 can be rotated to align the positioning hole on the locking block 4.2 with one of the positioning holes on the swinging member 2, and finally, pressing the pin 22 can lock the locking block 4.2 and the swinging member 2.

[0027] like Figure 4 and Figure 5As shown, a protrusion 6 is provided at the rear end of the track 5, and the position of the protrusion 6 is higher than the height of the track 5 itself. The rear wheel frame 1 is rotatably connected to the position of the protrusion 6, so that the overall height of the rear wheel frame 1 is also higher than the track 5 itself. When the rear wheel frame 1 swings downward, the rear wheel frame 1, the track 5 and the ground can form a triangle, thereby improving the transmission stability of the crawler track. When the rear wheel frame 1 swings upward, the end position of the rear wheel frame 1 can be lifted higher, which is more conducive to the inclined guide formed by the crawler track, making it easier for the snowmobile to reverse. The raised portion 6 includes a receiving groove 9, which is adapted in shape to the locking block 4.2, and stop blocks 10 are provided at both ends of the receiving groove 9, one of which is arranged vertically, and the other stop block 10 is arranged obliquely, and the locking block 4.2 includes two first mating surfaces 4.2.1 and a second mating surface 4.2.2, the two first mating surfaces 4.2.1 are distributed at an angle of 90°, and there is an arc transition between the two first mating surfaces 4.2.1, and the second mating surface 4.2.2 is away from the vertically arranged stop block 10.

[0028] The locking block 4.2 has two locking positions, such as Figure 4 In the locking position shown, the lock block 4.2 is locked with the lower positioning hole 8 on the swinging member 2. At this time, only the first mating surface 4.2.1 away from the second mating surface 4.2.2 is in contact with the vertically arranged stop block 10, and the second mating surface 4.2.2 and the first mating surface 4.2.1 adjacent to the second mating surface 4.2.2 are not in contact with the stop block 10. At this time, by pressing the pin 22, the lock block 4.2 and the swinging member 2 can be fixed. At this time, only the position of the lock block 4.2 relative to the swinging member 2 is constrained, and the position of the swinging member 2 relative to the vehicle track 5 is not constrained, so that the rear wheel frame 1 can move freely throughout its entire travel. The position of the lock block 4.2 is in a normal use state and has good reversing performance. When the snowmobile is reversing, the snow at the rear is pushed together, so that the snow accumulates at the rear of the snowmobile, and then the accumulated snow can make the rear wheel frame 1 swing upward, so that the track forms a guiding slope, thereby reversing the snowmobile back to the snow surface. Figure 5 As shown, the lock block 4.2 is locked with the upper positioning hole 8 on the swing member 2. At this time, the second mating surface 4.2.2 is in contact with the obliquely arranged stop block 10, and the first mating surface 4.2.1 adjacent to the second mating surface 4.2.2 is in contact with the vertically arranged stop block 10. At this time, by pressing the pin 22, the lock block 4.2 and the swing member 2 can be fixed. At this time, not only the position of the lock block 4.2 relative to the swing member 2 is constrained, but also the position of the swing member 2 relative to the vehicle track 5 is constrained. Since the swing member 2 rotates around the first rotating shaft 20, and the rotating shaft position of the lock block 4.2 is coaxial with the lock rod 4.1, when the swing member 2 moves around the first rotating shaft 20, the second mating surface 4.2.2 of the lock block 4.2 and the stop block 10 will brake the swing member 2 from swinging up and down. Figure 5 The locking position in the shown state can lock the position of the rear wheel frame 1 and improve the traction performance of the crawler track.

[0029] like Figure 4 or Figure 5 As shown, an adjusting groove 7 is also provided on the swing member 2, and the adjusting groove 7 is arranged along the length direction of the swing member 2, and a first connecting shaft 21 is provided in the adjusting groove 7, and a rectangular block 23 is provided on the first connecting shaft 21, and the rectangular block 23 is adapted to the adjusting groove 7, so as to prevent the first connecting shaft 21 from rotating relative to the swing member 2, while the rotating wheel 3 can rotate normally around the first connecting shaft 21, and a push rod 24 is provided at the front end of the adjusting groove 7, and the push rod 24 is fixed to the swing member 2 by a clamp and a nut, and a thread is provided on the surface of the push rod 24 to cooperate with the nut, and the push rod 24 is rotated, and under the action of the nut, the rectangular block 23 can be pushed to move toward the rear side of the adjusting groove 7, thereby adjusting the position of the rotating wheel 3, that is, the tightness of the track can be adjusted.

[0030] An elastic member 12 is also provided on the first rotating shaft 20 of the rear wheel frame 1. Specifically, the elastic member 12 is a first torsion spring structure, one end of the first torsion spring is overlapped above the locking rod 4.1, and the other end of the first torsion spring is overlapped below the suspension assembly 1, so that the torsion of the first torsion spring itself will produce downward pressure on the locking rod, thereby controlling the preload of the rear wheel frame 1. Increasing the torque of the elastic member 12 can reduce the lifting amount of the rear wheel frame 1, increase the contact area between the track and the ground, and improve the driving stability; while reducing the torque of the elastic member 12 can increase the lifting amount of the rear wheel frame 1 and improve the reversing performance. Specifically, a preload cam 13 is rotatably provided on the locking rod 4.1. The preload cam 13 is a pentagonal structure. The five sides of the preload cam 13 are five gears respectively. The preload cam 13 is eccentrically provided on the locking rod 4.1. Therefore, the distances from the five sides of the preload cam 13 to the locking rod 4.1 are not the same. When the preload cam 13 is rotated, the torque of the first torsion spring itself can be changed, thereby improving the control of the rear wheel carrier 1.

[0031] The suspension assembly 11 includes a main shaft 14, a connecting rod 25 and an adjusting support rod 26. The connecting rod 25 is arranged between two parallel rails 5 and connected to the rails 5 on both sides. The adjusting support rod 26 is arranged between the two parallel rails 5 and connected to the rails 5 on both sides. The main shaft 14 is arranged between the two parallel rails 5 and located between the connecting rod 25 and the adjusting support rod 26. The main shaft 14 is located above the two parallel rails 5. A shock absorber 27 is arranged between the main shaft 14 and the connecting rod 25, and an adjuster 28 is arranged between the main shaft 14 and the adjusting support rod 26. The shock absorber 27 and the adjuster 28 are both connected to the middle position of the main shaft 14. A second torsion spring 29 structure is arranged on both sides of the main shaft 14. One end of the second torsion spring 29 is connected to the adjuster 28, and the other end of the second torsion spring 29 is arranged on the rail 5. When the snowmobile is driving on the snow, the body of the snowmobile will vibrate and fluctuate, or the body of the snowmobile may fly up when passing a steep slope. The vibration and fluctuation of the body of the snowmobile will be absorbed by the suspension assembly 11 to reduce the collision of the body of the snowmobile. Under the action of the regulator 28, the shock absorber 27 and the second torsion spring 29, the main shaft 14 will also fluctuate up and down, which will buffer the ups and downs of the body of the snowmobile and greatly improve the user's driving experience of the snowmobile. Among them, the elastic member 12 (first torsion spring) and the adjustment support rod 26 are in contact with each other, and the first torsion spring is overlapped below the adjustment support rod 26.

[0032] A track wheel 15 is arranged on the main shaft 14, and a plurality of track wheels 15 are also arranged on the vehicle track 5. The track needs to be sleeved on the track wheels 14 on the main shaft 14 and the vehicle track 5 and on the rotating wheel 3 on the rear wheel frame 1. The suspension assembly 11 is located above the vehicle track assembly. The track wheels 15 on the main shaft 14 and the track wheels 15 on the vehicle track assembly form a triangular distribution as a whole. After the track is installed, the track also forms a triangular shape, thereby improving the stability of the snowmobile.

[0033] The shock absorber 27 is a gas spring structure. According to the vibration of the snowmobile itself, the shock absorber 27 will adaptively generate expansion and contraction so that the position of the main shaft 14 can be adjusted and changed. Therefore, the shock absorber 27 is rotatably connected to the main shaft 14, and the shock absorber 27 is also rotatably connected to the connecting rod 25. Specifically, a first hinge 30 is provided on the main shaft 14, and a second hinge 31 is provided on the connecting rod 25. The first hinge 30 is provided at the middle position of the main shaft 14, and the second hinge 31 is provided at the middle position of the connecting rod 25. The first hinge 30 is rotatably connected relative to the main shaft 14, and the second hinge 31 is rotatably connected relative to the connecting rod 25. Therefore, when the main shaft 14 is displaced up and down due to the pressure of the vehicle body, the shock absorber 27 can make the position of the main shaft 14 displace up and down through the first hinge part 30 and the second hinge part 31 and its own telescopic effect, and the second torsion spring 29 and the shock absorber 27's own elastic force absorb part of the pressure from the vehicle body or buffer the pressure of the vehicle body.

[0034] The first hinge part 30 is formed by two identical L-shaped bending parts arranged in parallel. The first hinge part 30 has a long part and a short part. The main shaft 14 is rotatably connected in the middle of the long part of the first hinge part 30. Under normal circumstances, the long part of the first hinge part 30 is arranged nearly vertically, and the upper end of the first hinge part 30 is tilted forward toward the suspension assembly 11, and the angle between the tilt angle and the vertical line is about 3° to 5°. The second hinge part 31 is also an L-shaped bending part, and the middle of the second hinge part 31 is also a hollow structure. The short part of the second hinge part 31 is rotatably connected to the connecting rod 25. Specifically, as shown in FIG. Figure 7 As shown, a first rod 32 is fixedly arranged in the middle position of the connecting rod 25, one end of the first rod 32 is fixedly connected to the connecting rod 25, and the other end of the first rod 32 is rotatably connected to the short part of the second hinged part 31. One end of the shock absorber 27 is hinged in the middle of the first hinged part 30 (between two parallel bent parts) and above the main shaft 14, and the other end of the shock absorber 27 is hinged in the long part of the second hinged part 31 and away from one end of the short part of the second hinged part 31, so that the first hinged part 30, the second hinged part 31 and the shock absorber 27 form a set of double rocker mechanisms.

[0035] When the vehicle body as a whole moves downward, the main shaft 14 also moves downward. Since the upper side of the first hinge 30 is slightly inclined toward the front side of the suspension assembly 11, the first hinge 30 rotates, driving the shock absorber 27 to move toward the front side of the suspension assembly 11, and the other end of the shock absorber 27 also swings forward toward the suspension assembly 11 through the rotation of the second hinge 31. When the vehicle body as a whole moves upward, the main shaft 14 moves upward, and the pressure applied by the vehicle body and the main shaft 14 on the first hinge 30 is reduced. Under the action of the second torsion spring 29, the first hinge 30 rotates, driving the shock absorber 27 to move toward the rear side of the suspension assembly 11, and the other end of the shock absorber 27 drives the lower end of the second hinge 31 to move toward the rear side of the suspension assembly 11.

[0036] An adjusting rod 33 is also provided between the first hinge part 30 and the second hinge part 31. The adjusting rod 33 is also hinged to the first hinge part 30 and the second hinge part 31. Specifically, one end of the adjusting rod 33 is rotationally connected to the angle position of the first hinge part 30 and below the main shaft 14, and the other end of the adjusting rod 33 is rotationally connected to the long part of the second hinge part 31 and above the shock absorber 27, so that one end of the adjusting rod 33 is located above the shock absorber 27, and the other end of the adjusting rod 33 is located below the shock absorber 27, forming a cross arrangement between the adjusting rod 33 and the shock absorber 27. When the vehicle body as a whole moves downward, the main shaft 14 also moves downward. Since the upper side of the first hinge 30 is slightly inclined toward the front side of the suspension assembly 11, the upper side of the first hinge 30 rotates, driving one end of the shock absorber 27 to move toward the front side of the suspension assembly 11, and the lower side of the first hinge 30 rotates, driving one end of the adjustment rod 33 to move toward the rear side of the suspension assembly 11, while the other end of the shock absorber 27 also swings forward toward the suspension assembly 11 through the rotation of the second hinge 31, and the other end of the adjustment rod 33 also swings forward. When the suspension assembly 11 swings forward, since the length of the adjusting rod 33 is constant, the distance between the two points connecting the adjusting rod 33 between the first hinge 30 and the second hinge 31 remains constant. The main shaft 14 moves downward as a whole, and the upper angle of the first hinge 30 relative to the vertical direction changes, that is, the distance between the two points connecting the shock absorber 27 between the first hinge 30 and the second hinge 31 changes, thereby compressing the shock absorber 27, and absorbing the pressure on the main shaft 14 through the shock absorber 27, thereby achieving a shock absorbing effect. Among them, there are two adjusting rods 33, and the two adjusting rods 33 are arranged in parallel. In order to avoid interference between the shock absorber 27 and the adjusting rod 33, one end of the shock absorber 27 is set at the middle position of the first hinge 30, and the other end of the shock absorber 2 is set at the middle position of the second hinge 7. One end of the two adjusting rods 8 is set at the two sides of the first hinge 30, and the other end of the two adjusting rods 33 is set at the two sides of the second hinge 31.

[0037] The regulator 28 includes a support main board 34 and a support frame 35. The support main board 34 is arranged obliquely, and the support frame 35 is arranged vertically. The support main board 34 is a plate-like structure. The upper end of the support main board 34 is rotatably connected to the main shaft 14, and the lower end of the support main board 34 is rotatably connected to the upper end of the support frame 35. Specifically, the support frame 35 is composed of two vertical rod frames. The upper end of the support frame 35 is hinged to the two sides of the bottom of the support main board 34, and the bottom of the support frame 35 is connected to the adjustment support rod 26. When the vehicle body as a whole moves up and down, the main shaft 14 will also move up and down accordingly, and the top of the support main board 34 will also move up and down with the main shaft 14 and rotate. In order to prevent the support main board 34 and the first hinge part 30 from interfering, a receiving groove is provided at the upper end of the support main board 34. The receiving groove can accommodate the first hinge part 30, so that the relative rotation of the first hinge part 30 and the relative rotation of the support main board 34 will not interfere.

[0038] In this solution, the shock absorber 27 is arranged at the front side of the snowmobile, that is, at the front side of the suspension assembly 11, and the adjuster 28 is arranged at the rear side of the snowmobile, that is, at the rear side of the suspension assembly 11. Therefore, when the suspension assembly 11 is displaced as a whole, under the action of the rear adjuster 28, the suspension assembly 11 can transfer the pressure or movement generated by the body to the front side of the snowmobile to a greater or lesser extent, thereby improving the driving experience of the user.

[0039] Example 2: Figures 1 to 7A snowmobile frame shown includes a track assembly, which is formed by two tracks 5 arranged in parallel, and a plurality of connecting rods are arranged between the two tracks 5 to connect the two tracks 5 together to form a stable track assembly. A rear wheel frame 1 is arranged at the rear side of the track assembly, and the rear wheel frame 1 includes two swinging members 2, and the swinging members 2 are plate-shaped structures. A first rotating shaft 20 is arranged at one end of the swinging member 2, and the first rotating shaft 20 is connected to the rear end of the track 5 and also connects the two swinging members 2, so that the two swinging members 2 are connected together and can swing synchronously, and a first connecting shaft 21 is arranged at the other end of the swinging member 2, and the first connecting shaft 21 also connects the two swinging members 2, so that the swinging members 2 are more stable, and rotating wheels 3 are arranged at both ends of the first connecting shaft 21, specifically, two rotating wheels 3 are arranged at one end of the first connecting shaft 21, and the first connecting shaft 21 penetrates the swinging member 2, and the two rotating wheels 3 are respectively located on the first connecting shaft 21 and on both sides of the swinging member 2, and similarly, the other end of the first connecting shaft 21 is also arranged in the same way. The rear wheel frame 1 swings around the first rotating shaft 20, so that the position of the rotating wheel 3 on the swinging member 2 is raised or lowered, and a track (not shown in the figure) is mounted on the rotating wheel 3, so that the shape of the track on the rear side of the snowmobile can be changed, so that the track becomes an inclined surface. The inclined surface has a guiding effect, which is beneficial to the reversing of the snowmobile in deep snow and can effectively cope with driving on deep snow road conditions.

[0040] A locking assembly 4 is also provided on the two swinging members 2, and the locking assembly 4 can lock the swinging members 2 and fix them on the track assembly. Specifically, the locking assembly 4 includes a locking rod 4.1 and two locking blocks 4.2. The locking rod 4.1 is arranged between the two swinging members 2 and close to one side of the track 5. Both ends of the locking rod 4.1 pass through the swinging members 2. Both ends of the locking rod 4.1 are also rotatably connected to a locking block 4.2 respectively, and the locking block 4.2 can lock the position of the swinging member 2. Specifically, positioning holes 8 are provided on the locking block 4.2 and the swinging member 2, wherein there is one positioning hole on the locking block 4.2, and the positioning hole on the locking block 4.2 is used to install a pin 22, and a spring is provided on the outside of the pin 22 and is located inside the locking block 4.2, and the spring can automatically reset and lock the pin 22; there are two positioning holes on the swinging member 2, and the position of the locking block 4.2 can be rotated to align the positioning hole on the locking block 4.2 with one of the positioning holes on the swinging member 2, and finally, pressing the pin 22 can lock the locking block 4.2 and the swinging member 2.

[0041] like Figure 4 and Figure 5As shown, a protrusion 6 is provided at the rear end of the track 5, and the position of the protrusion 6 is higher than the height of the track 5 itself. The rear wheel frame 1 is rotatably connected to the position of the protrusion 6, so that the overall height of the rear wheel frame 1 is also higher than the track 5 itself. When the rear wheel frame 1 swings downward, the rear wheel frame 1, the track 5 and the ground can form a triangle, thereby improving the transmission stability of the crawler track. When the rear wheel frame 1 swings upward, the end position of the rear wheel frame 1 can be lifted higher, which is more conducive to the inclined guide formed by the crawler track, making it easier for the snowmobile to reverse. The raised portion 6 includes a receiving groove 9, which is adapted in shape to the locking block 4.2, and stop blocks 10 are provided at both ends of the receiving groove 9, one of which is arranged vertically, and the other stop block 10 is arranged obliquely, and the locking block 4.2 includes two first mating surfaces 4.2.1 and a second mating surface 4.2.2, the two first mating surfaces 4.2.1 are distributed at an angle of 90°, and there is an arc transition between the two first mating surfaces 4.2.1, and the second mating surface 4.2.2 is away from the vertically arranged stop block 10.

[0042] The locking block 4.2 has two locking positions, such as Figure 4 In the locking position shown, the lock block 4.2 is locked with the lower positioning hole 8 on the swinging member 2. At this time, only the first mating surface 4.2.1 away from the second mating surface 4.2.2 is in contact with the vertically arranged stop block 10, and the second mating surface 4.2.2 and the first mating surface 4.2.1 adjacent to the second mating surface 4.2.2 are not in contact with the stop block 10. At this time, by pressing the pin 22, the lock block 4.2 and the swinging member 2 can be fixed. At this time, only the position of the lock block 4.2 relative to the swinging member 2 is constrained, and the position of the swinging member 2 relative to the vehicle track 5 is not constrained, so that the rear wheel frame 1 can move freely throughout its entire travel. The position of the lock block 4.2 is in a normal use state and has good reversing performance. When the snowmobile is reversing, the snow at the rear is pushed together, so that the snow accumulates at the rear of the snowmobile, and then the accumulated snow can make the rear wheel frame 1 swing upward, so that the track forms a guiding slope, thereby reversing the snowmobile back to the snow surface. Figure 5 As shown, the lock block 4.2 is locked with the upper positioning hole 8 on the swing member 2. At this time, the second mating surface 4.2.2 is in contact with the obliquely arranged stop block 10, and the first mating surface 4.2.1 adjacent to the second mating surface 4.2.2 is in contact with the vertically arranged stop block 10. At this time, by pressing the pin 22, the lock block 4.2 and the swing member 2 can be fixed. At this time, not only the position of the lock block 4.2 relative to the swing member 2 is constrained, but also the position of the swing member 2 relative to the vehicle track 5 is constrained. Since the swing member 2 rotates around the first rotating shaft 20, and the rotating shaft position of the lock block 4.2 is coaxial with the lock rod 4.1, when the swing member 2 moves around the first rotating shaft 20, the second mating surface 4.2.2 of the lock block 4.2 and the stop block 10 will brake the swing member 2 from swinging up and down. Figure 5 The locking position in the shown state can lock the position of the rear wheel frame 1 and improve the traction performance of the crawler track.

[0043] like Figure 4 or Figure 5 As shown, an adjusting groove 7 is also provided on the swing member 2, and the adjusting groove 7 is arranged along the length direction of the swing member 2, and a first connecting shaft 21 is provided in the adjusting groove 7, and a rectangular block 23 is provided on the first connecting shaft 21, and the rectangular block 23 is adapted to the adjusting groove 7, so as to prevent the first connecting shaft 21 from rotating relative to the swing member 2, while the rotating wheel 3 can rotate normally around the first connecting shaft 21, and a push rod 24 is provided at the front end of the adjusting groove 7, and the push rod 24 is fixed to the swing member 2 by a clamp and a nut, and a thread is provided on the surface of the push rod 24 to cooperate with the nut, and the push rod 24 is rotated, and under the action of the nut, the rectangular block 23 can be pushed to move toward the rear side of the adjusting groove 7, thereby adjusting the position of the rotating wheel 3, that is, the tightness of the track can be adjusted.

[0044] An elastic member 12 is also provided on the first rotating shaft 20 of the rear wheel frame 1. Specifically, the elastic member 12 is a first torsion spring structure, one end of the first torsion spring is overlapped above the locking rod 4.1, and the other end of the first torsion spring is overlapped below the suspension assembly 1, so that the torsion of the first torsion spring itself will produce downward pressure on the locking rod, thereby controlling the preload of the rear wheel frame 1. Increasing the torque of the elastic member 12 can reduce the lifting amount of the rear wheel frame 1, increase the contact area between the track and the ground, and improve the driving stability; while reducing the torque of the elastic member 12 can increase the lifting amount of the rear wheel frame 1 and improve the reversing performance. Specifically, a preload cam 13 is rotatably provided on the locking rod 4.1. The preload cam 13 is a pentagonal structure. The five sides of the preload cam 13 are five gears respectively. The preload cam 13 is eccentrically provided on the locking rod 4.1. Therefore, the distances from the five sides of the preload cam 13 to the locking rod 4.1 are not the same. When the preload cam 13 is rotated, the torque of the first torsion spring itself can be changed, thereby improving the control of the rear wheel carrier 1.

[0045] The suspension assembly 11 includes a main shaft 14, a connecting rod 25 and an adjusting support rod 26. The connecting rod 25 is arranged between two parallel rails 5 and connected to the rails 5 on both sides. The adjusting support rod 26 is arranged between the two parallel rails 5 and connected to the rails 5 on both sides. The main shaft 14 is arranged between the two parallel rails 5 and located between the connecting rod 25 and the adjusting support rod 26. The main shaft 14 is located above the two parallel rails 5. A shock absorber 27 is arranged between the main shaft 14 and the connecting rod 25, and an adjuster 28 is arranged between the main shaft 14 and the adjusting support rod 26. The shock absorber 27 and the adjuster 28 are both connected to the middle position of the main shaft 14. A second torsion spring 29 structure is arranged on both sides of the main shaft 14. One end of the second torsion spring 29 is connected to the adjuster 28, and the other end of the second torsion spring 29 is arranged on the rail 5. When the snowmobile is driving on the snow, the body of the snowmobile will vibrate and fluctuate, or the body of the snowmobile may fly up when passing a steep slope. The vibration and fluctuation of the body of the snowmobile will be absorbed by the suspension assembly 11 to reduce the collision of the body of the snowmobile. Under the action of the regulator 28, the shock absorber 27 and the second torsion spring 29, the main shaft 14 will also fluctuate up and down, which will buffer the ups and downs of the body of the snowmobile and greatly improve the user's driving experience of the snowmobile. Among them, the elastic member 12 (first torsion spring) and the adjustment support rod 26 are in contact with each other, and the first torsion spring is overlapped below the adjustment support rod 26.

[0046] A track wheel 15 is arranged on the main shaft 14, and a plurality of track wheels 15 are also arranged on the vehicle track 5. The track needs to be sleeved on the track wheels 14 on the main shaft 14 and the vehicle track 5 and on the rotating wheel 3 on the rear wheel frame 1. The suspension assembly 11 is located above the vehicle track assembly. The track wheels 15 on the main shaft 14 and the track wheels 15 on the vehicle track assembly form a triangular distribution as a whole. After the track is installed, the track also forms a triangular shape, thereby improving the stability of the snowmobile.

[0047] The shock absorber 27 is a gas spring structure. According to the vibration of the snowmobile itself, the shock absorber 27 will adaptively generate expansion and contraction so that the position of the main shaft 14 can be adjusted and changed. Therefore, the shock absorber 27 is rotatably connected to the main shaft 14, and the shock absorber 27 is also rotatably connected to the connecting rod 25. Specifically, a first hinge 30 is provided on the main shaft 14, and a second hinge 31 is provided on the connecting rod 25. The first hinge 30 is provided at the middle position of the main shaft 14, and the second hinge 31 is provided at the middle position of the connecting rod 25. The first hinge 30 is rotatably connected relative to the main shaft 14, and the second hinge 31 is rotatably connected relative to the connecting rod 25. Therefore, when the main shaft 14 is displaced up and down due to the pressure of the vehicle body, the shock absorber 27 can make the position of the main shaft 14 displace up and down through the first hinge part 30 and the second hinge part 31 and its own telescopic effect, and the second torsion spring 29 and the shock absorber 27's own elastic force absorb part of the pressure from the vehicle body or buffer the pressure of the vehicle body.

[0048] The first hinge part 30 is formed by two identical L-shaped bending parts arranged in parallel. The first hinge part 30 has a long part and a short part. The main shaft 14 is rotatably connected in the middle of the long part of the first hinge part 30. Under normal circumstances, the long part of the first hinge part 30 is arranged nearly vertically, and the upper end of the first hinge part 30 is tilted forward toward the suspension assembly 11, and the angle between the tilt angle and the vertical line is about 3° to 5°. The second hinge part 31 is also an L-shaped bending part, and the middle of the second hinge part 31 is also a hollow structure. The short part of the second hinge part 31 is rotatably connected to the connecting rod 25. Specifically, as shown in FIG. Figure 7 As shown, a first rod 32 is fixedly arranged in the middle position of the connecting rod 25, one end of the first rod 32 is fixedly connected to the connecting rod 25, and the other end of the first rod 32 is rotatably connected to the short part of the second hinged part 31. One end of the shock absorber 27 is hinged in the middle of the first hinged part 30 (between two parallel bent parts) and above the main shaft 14, and the other end of the shock absorber 27 is hinged in the long part of the second hinged part 31 and away from one end of the short part of the second hinged part 31, so that the first hinged part 30, the second hinged part 31 and the shock absorber 27 form a set of double rocker mechanisms.

[0049] When the vehicle body as a whole moves downward, the main shaft 14 also moves downward. Since the upper side of the first hinge 30 is slightly inclined toward the front side of the suspension assembly 11, the first hinge 30 rotates, driving the shock absorber 27 to move toward the front side of the suspension assembly 11, and the other end of the shock absorber 27 also swings forward toward the suspension assembly 11 through the rotation of the second hinge 31. When the vehicle body as a whole moves upward, the main shaft 14 moves upward, and the pressure applied by the vehicle body and the main shaft 14 on the first hinge 30 is reduced. Under the action of the second torsion spring 29, the first hinge 30 rotates, driving the shock absorber 27 to move toward the rear side of the suspension assembly 11, and the other end of the shock absorber 27 drives the lower end of the second hinge 31 to move toward the rear side of the suspension assembly 11.

[0050] An adjusting rod 33 is also provided between the first hinge part 30 and the second hinge part 31. The adjusting rod 33 is also hinged to the first hinge part 30 and the second hinge part 31. Specifically, one end of the adjusting rod 33 is rotationally connected to the angle position of the first hinge part 30 and below the main shaft 14, and the other end of the adjusting rod 33 is rotationally connected to the long part of the second hinge part 31 and above the shock absorber 27, so that one end of the adjusting rod 33 is located above the shock absorber 27, and the other end of the adjusting rod 33 is located below the shock absorber 27, forming a cross arrangement between the adjusting rod 33 and the shock absorber 27. When the vehicle body as a whole moves downward, the main shaft 14 also moves downward. Since the upper side of the first hinge 30 is slightly inclined toward the front side of the suspension assembly 11, the upper side of the first hinge 30 rotates, driving one end of the shock absorber 27 to move toward the front side of the suspension assembly 11, and the lower side of the first hinge 30 rotates, driving one end of the adjustment rod 33 to move toward the rear side of the suspension assembly 11, while the other end of the shock absorber 27 also swings forward toward the suspension assembly 11 through the rotation of the second hinge 31, and the other end of the adjustment rod 33 also swings forward. When the suspension assembly 11 swings forward, since the length of the adjusting rod 33 is constant, the distance between the two points connecting the adjusting rod 33 between the first hinge 30 and the second hinge 31 remains constant. The main shaft 14 moves downward as a whole, and the upper angle of the first hinge 30 relative to the vertical direction changes, that is, the distance between the two points connecting the shock absorber 27 between the first hinge 30 and the second hinge 31 changes, thereby compressing the shock absorber 27, and absorbing the pressure on the main shaft 14 through the shock absorber 27, thereby achieving a shock absorbing effect. Among them, there are two adjusting rods 33, and the two adjusting rods 33 are arranged in parallel. In order to avoid interference between the shock absorber 27 and the adjusting rod 33, one end of the shock absorber 27 is set at the middle position of the first hinge 30, and the other end of the shock absorber 2 is set at the middle position of the second hinge 7. One end of the two adjusting rods 8 is set at the two sides of the first hinge 30, and the other end of the two adjusting rods 33 is set at the two sides of the second hinge 31.

[0051] The regulator 28 includes a support main board 34 and a support frame 35. The support main board 34 is arranged obliquely, and the support frame 35 is arranged vertically. The support main board 34 is a plate-like structure. The upper end of the support main board 34 is rotatably connected to the main shaft 14, and the lower end of the support main board 34 is rotatably connected to the upper end of the support frame 35. Specifically, the support frame 35 is composed of two vertical rod frames. The upper end of the support frame 35 is hinged to the two sides of the bottom of the support main board 34, and the bottom of the support frame 35 is connected to the adjustment support rod 26. When the vehicle body as a whole moves up and down, the main shaft 14 will also move up and down accordingly, and the top of the support main board 34 will also move up and down with the main shaft 14 and rotate. In order to prevent the support main board 34 and the first hinge part 30 from interfering, a receiving groove is provided at the upper end of the support main board 34. The receiving groove can accommodate the first hinge part 30, so that the relative rotation of the first hinge part 30 and the relative rotation of the support main board 34 will not interfere.

[0052] In this solution, the shock absorber 27 is arranged at the front side of the snowmobile, that is, at the front side of the suspension assembly 11, and the adjuster 28 is arranged at the rear side of the snowmobile, that is, at the rear side of the suspension assembly 11. Therefore, when the suspension assembly 11 is displaced as a whole, under the action of the rear adjuster 28, the suspension assembly 11 can transfer the pressure or movement generated by the body to the front side of the snowmobile to a greater or lesser extent, thereby improving the driving experience of the user.

[0053] A forearm adjustment frame 16 is also provided in the front direction of the suspension assembly 11, and the suspension assembly 11 is rotatably connected to the forearm adjustment frame 16. Specifically, the forearm adjustment frame 16 includes a swing frame 17, an intermediate spring 19 and a strap 18. The swing frame 17 is composed of two rods arranged at a certain angle. One end of the swing frame 17 is fixed on the connecting rod 25, and the other end of the swing frame 17 is provided with a second rod 36. The second rod 36 is arranged parallel to the connecting rod 25. The swing frame 17 can also swing to a certain extent while the connecting rod 25 rotates. A third rod 37 is also provided between the two rails 5. An intermediate spring 19 is provided between the third rod 37 and the second rod frame 36. The intermediate spring 19 can limit the swing of the swing frame 17 to prevent the swing of the swing frame 17 from being too large, and can also support the swing frame 17 to prevent the swing frame 17 from falling and colliding with the rail 5. A fourth rod 38 is also provided at the front end of the rail 5, and a strap 18 is provided between the fourth rod 38 and the second rod 36. There are two straps 18 in total, and they are symmetrically arranged between the fourth rod 38 and the second rod 36. The length of the strap 18 can be adjusted. The strap 18 can also limit the swing of the swing frame 17. When the swing frame 17 swings upward beyond the limit, the strap 18 will generate a pulling force on the second rod 36 and completely limit the swing of the swing frame 17. Under normal conditions, the strap 18 is in a relaxed state.

[0054] When the snowmobile is in the flying state and falls, the swing frame 17 will swing upward, that is, under the action of the swing frame 17, the connecting rod 25 rotates, driving the first rod 32 on the connecting rod 25 to rotate clockwise (such as Figure 7 The swing frame 17 also has a pulling force on the front side of the track assembly under the action of the strap 18, which can prevent the front side of the vehicle body from falling too fast, making the vehicle body more balanced as a whole, and improving the user's safe driving performance while improving driving comfort.

Claims

1. A snowmobile frame, characterized in that: It comprises a track assembly, on which a rear wheel frame is provided, which is rotatably connected to the track assembly, and the rear wheel frame comprises a swinging member and a rotating wheel, which is rotatably connected to the track assembly, and the rotating wheel is provided at one end of the swinging member away from the track assembly, and a locking assembly is provided between the swinging member and the track assembly.

2. A snowmobile frame according to claim 1, characterized in that: The vehicle track assembly comprises two vehicle tracks arranged in parallel, and a protrusion is arranged on one side of the vehicle track close to the rear wheel frame, and the protrusion is rotatably connected to the rear wheel frame.

3. A snowmobile frame according to claim 2, characterized in that: The swinging member is provided with an adjusting groove on one side away from the raised portion, and the rotating wheel is arranged in the adjusting groove.

4. A snowmobile frame according to claim 2, characterized in that: The lock assembly comprises a lock rod and a lock block, wherein the lock rod is connected to the swing member, and both ends of the lock rod are rotatably connected to the lock block, and positioning holes are provided on the lock block and the swing member.

5. A snowmobile frame according to claim 4, characterized in that: The protruding portion is provided with a receiving groove adapted to the locking block, and stop blocks are provided at both ends of the receiving groove.

6. A snowmobile frame according to claim 4 or 5, characterized in that: It also includes a suspension assembly, an elastic member is provided on the rear wheel frame, a preload cam is provided on the locking rod, one end of the elastic member abuts against the preload cam, and the other end of the elastic member abuts against the suspension assembly.

7. A snowmobile frame according to claim 6, characterized in that: The suspension assembly is arranged on the vehicle track assembly, and the suspension assembly comprises a main shaft, and track wheels are arranged on the main shaft and the vehicle track.

8. A snowmobile frame according to claim 6, characterized in that: A forearm adjustment frame is provided on the side of the track assembly away from the rear wheel frame. The forearm adjustment frame includes a swing frame. A strap is provided between the swing frame and the track assembly.

9. A snowmobile frame according to claim 8, characterized in that: An intermediate spring is also arranged between the swing frame and the vehicle rail assembly.

10. A snowmobile frame according to claim 9, characterized in that: The suspension assembly is rotatably connected to the forearm adjustment frame.

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