Power transmission mechanism of crawler-type moped and adjustment method of crawler action

Abstract

The invention provides a power transmission mechanism of a crawler-type moped and an adjusting method of crawler actions, the power transmission mechanism comprises a pair of crawler movement mechanisms mounted on two sides of the bottom of the moped, and each of the pair of crawler movement mechanisms comprises a transmission frame, a front crawler movement structure and a rear crawler movement structure; the front track motion structure and the rear track motion structure are respectively mounted at the front end and the rear end of the transmission frame; the transmission frame comprises an outer side plate, a middle side plate and an inner side plate, the outer side plate, the middle side plate and the inner side plate are sequentially and fixedly installed at the bottoms of the two sides of the moped from outside to inside, and the front crawler belt movement structure is installed at the front end of the middle side plate and the front end of the inner side plate. According to the mechanism, power is directly provided by the motor and the motor extension shaft in a unified mode, the utilization rate of transmission power is guaranteed, the mechanism can be suitable for different steps and abrupt slopes, the built-in design is adopted, the external space is saved, and due to the fact that sealing performance is good, erosion of rainwater or dust is avoided, and the structure is more stable in operation.

Description

Technical Field

[0001] The present invention relates to the technical field of power-assisted vehicles, and in particular to a power transmission mechanism of a track-type power-assisted vehicle and a method for adjusting the track movement. Background Art

[0002] As current tracked wheelchairs, power-assisted vehicles and other tracked transfer tools, they all have the following disadvantages:

[0003] First, there are many problems caused by the overly complex transmission structure during operation. The overly complex power transmission mechanism will cause power loss, followed by noise and mechanical wear, thus reducing the service life of the product;

[0004] Second, the coordination of the front and rear tracks is directly related to the quality of the product. If the front and rear tracks do not respond in time, it will cause safety hazards to the users. Summary of the invention

[0005] In view of the above problems, the present invention provides a power transmission mechanism of a track-type power-assisted vehicle and a method for adjusting the track movement. The mechanism is directly powered by a motor and a motor extension shaft to ensure the utilization rate of the transmission power, and can be applied to different steps and steep slopes. It adopts a built-in design to save external space. Due to its good sealing performance, it avoids erosion by rain or dust, thereby making the structure more stable during operation.

[0006] To solve the above problems, the technical solution adopted by the present invention is:

[0007] A power transmission mechanism of a crawler-type power-assisted vehicle, comprising a pair of crawler motion mechanisms installed on both sides of the bottom of the power-assisted vehicle, wherein each of the crawler motion mechanisms comprises a transmission frame, a front crawler motion structure and a rear crawler motion structure, wherein the front crawler motion structure and the rear crawler motion structure are respectively installed at the front and rear ends of the transmission frame;

[0008] The transmission frame includes an outer plate, a middle plate and an inner plate, which are fixedly mounted on the bottom of both sides of the power-assisted vehicle in sequence from the outside to the inside, the front crawler motion structure is mounted on the front ends of the middle plate and the inner plate, and the rear crawler motion structure is mounted on the rear ends of the outer plate and the middle plate;

[0009] The crawler motion mechanism also includes a driving assembly mounted on the transmission frame, the driving assembly includes a front crawler synchronous wheel and a rear crawler synchronous wheel that rotate synchronously and in the same direction, and the front crawler synchronous wheel and the rear crawler synchronous wheel are used to synchronously drive the front crawler motion structure and the rear crawler motion structure;

[0010] The front crawler motion structure and the rear crawler motion structure each include a pair of tail plates, a tail wheel, an idler wheel and a crawler track, the front pair of tail plates are rotatably connected between the front ends of the inner side plates and the middle side plates, the rear pair of tail plates are rotatably connected between the rear ends of the middle side plates and the outer side plates, the idler wheel and the tail wheel are rotatably connected between the front and rear ends of the pair of tail plates, respectively, the front crawler synchronous wheel, the corresponding idler wheel and the tail wheel are covered with crawlers, and the rear crawler motion structure, the corresponding idler wheel and the tail wheel are covered with crawlers;

[0011] It also includes an elevation angle adjustment mechanism which can adjust the elevation angles of the front crawler motion structure and the rear crawler motion structure.

[0012] Preferably, the middle side plate is in an eight-shaped shape, and the outer side plate and the inner side plate correspond to the inner and outer sides of the middle side plate respectively.

[0013] Preferably, the driving assembly further comprises a motor fixedly mounted on the inner side of the inner plate, an output end of the motor is connected to a motor extension shaft, and the front crawler synchronous wheel and the rear crawler synchronous wheel are both fixedly mounted on the motor extension shaft.

[0014] Preferably, a pair of tensioning blocks are installed on both sides of the tail plates, and the tensioning blocks are used to adjust the tightness of the track. A pair of belt pressing wheels are also installed on the bottom of both sides of the power-assisted vehicle, and the pair of belt pressing wheels press the tracks at both ends respectively.

[0015] Preferably, track slide plates are fixedly installed at the bottom between a pair of tail plates at the front and rear ends, between the inner plate and the middle plate, and between the outer plate and the middle plate, and the track slide plates cooperate with the corresponding tracks.

[0016] Preferably, the elevation angle adjustment mechanism includes a pair of electric push rods, one of which is rotatably connected to the inner side of the inner side plate through a push rod fixed shaft, and the other electric push rod is rotatably connected to the inner side of the rear end of the middle side plate on the same side through a push rod fixed shaft, and the telescopic end of the electric push rod is connected to the corresponding tail plate through a linkage assembly.

[0017] Preferably, the linkage assembly includes a linkage tube rotatably connected between a pair of tail plates, one end of the linkage tube is rotatably connected to the telescopic end of the electric push rod through a linkage handle, the middle part of the linkage tube is fixedly connected to a linkage tube swing arm, the end of the linkage tube swing arm is rotatably connected to a balance rod, and balance rod connectors are installed between the two ends of the balance rod and the corresponding tail plates.

[0018] The present invention also provides a method for adjusting the crawler movement, comprising the following steps:

[0019] S1. The power of the motor drives the front crawler synchronous wheel and the rear crawler synchronous wheel to rotate in the same direction through the motor extension shaft. The front crawler synchronous wheel and the rear crawler synchronous wheel transmit the power to the idler wheel and the tail wheel in sequence through the crawler tracks connected thereto, thereby driving the operation of the entire front crawler motion structure and the rear crawler motion structure;

[0020] S2. When the electric push rod is pushed out and passes through the linkage handle and linkage tube connected thereto, the linkage tube swing arm welded thereto is tilted in the opposite direction, so that the balance bar moves upward under the action of the linkage tube swing arm, and at the same time, the balance bar connectors at both ends and the rear end of the tail plate are lifted up. Due to the principle of leverage, the tail wheel at the other end of the tail plate moves downward, so that the front crawler motion structure or the rear crawler motion structure is flush with the ground;

[0021] S3. The electric push rod retracts and causes the linkage tube swing arm welded to it to fall in the opposite direction through the linkage handle and linkage tube connected to it, so that the balance bar moves downward under the action of the linkage tube swing arm, and at the same time drives the balance bar connectors at both ends and the rear end of the tail board to fall. Due to the lever principle, the tail wheel at the other end of the tail board is lifted upward, so that the front crawler motion structure or the rear crawler motion structure is tilted at a set angle to achieve preparation before climbing the stairs.

[0022] The beneficial effects of the present invention are:

[0023] 1. The crawler motion mechanism for stair climbing in the present invention is located on both sides of the vehicle, and the crawler motion mechanism on each side is divided into two parts, a front crawler motion structure and a rear crawler motion structure. The power of the front crawler motion structure and the rear crawler motion structure comes from the front crawler synchronous wheel and the rear crawler synchronous wheel located on the same motor extension shaft, and the power is directly provided by the motor and the motor extension shaft, thereby ensuring the utilization rate of the transmission power.

[0024] 2. The elevation angles of the front crawler drive structure and the rear crawler drive structure are controlled by independent electric push rods, so that they can be suitable for different steps and steep slopes; the elevation angle adjustment mechanism of the present invention adopts a built-in design, which saves external space, and due to its good sealing performance, it avoids erosion by rain or dust, thereby making the structure more stable during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 A top view of the present invention;

[0027] Figure 3 It is a front view schematic diagram of the crawler motion mechanism proposed by the present invention;

[0028] Figure 4 It is a cross-sectional schematic diagram of the crawler motion mechanism proposed by the present invention.

[0029] In the figure: 1 outer plate, 2 middle plate, 3 inner plate, 4 motor, 5 motor extension shaft, 6 front crawler track synchronous wheel, 7 rear crawler track synchronous wheel, 8 idler wheel, 9 tail wheel, 10 crawler track, 11 tail plate, 12 linkage tube, 13 linkage handle, 14 balance bar, 15 balance bar connector, 16 linkage tube swing arm, 17 electric push rod, 18 push rod fixed shaft, 19 front crawler track motion structure, 20 rear crawler track motion structure, 21 tensioning block, 22 belt pressure wheel, 23 crawler slide plate. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0032] Reference Figure 1-4 A power transmission mechanism of a track-type power-assisted vehicle includes a pair of track motion mechanisms installed on both sides of the bottom of the power-assisted vehicle. The pair of track motion mechanisms each includes a transmission frame, a front track motion structure 19 and a rear track motion structure 20. The front track motion structure 19 and the rear track motion structure 20 are respectively installed at the front and rear ends of the transmission frame.

[0033] The transmission frame includes an outer plate 1, a middle plate 2 and an inner plate 3, which are fixedly installed on the bottom of both sides of the power-assisted vehicle from the outside to the inside. The front crawler motion structure 19 is installed at the front ends of the middle plate 2 and the inner plate 3, and the rear crawler motion structure 20 is installed at the rear ends of the outer plate 1 and the middle plate 2. The middle plate 2 is an eight-shaped plate, and the outer plate 1 and the inner plate 3 correspond to the inner and outer sides of the middle plate 2 respectively.

[0034] The crawler motion mechanism also includes a driving assembly installed on the transmission frame, and the driving assembly includes a front crawler synchronous wheel 6 and a rear crawler synchronous wheel 7 that rotate synchronously and in the same direction, and the front crawler synchronous wheel 6 and the rear crawler synchronous wheel 7 are used to synchronously drive the front crawler motion structure 19 and the rear crawler motion structure 20. The driving assembly also includes a motor 4 fixedly installed on the inner side of the inner plate 3, and the output end of the motor 4 is connected to the motor extension shaft 5. The front crawler synchronous wheel 6 and the rear crawler synchronous wheel 7 are both fixedly installed on the motor extension shaft 5. The power of the front crawler motion structure 19 and the rear crawler motion structure 20 comes from the front crawler synchronous wheel 6 and the rear crawler synchronous wheel 7 located on the same motor extension shaft 5, and the power is directly provided by the motor 4 and the motor extension shaft 5, thereby ensuring the utilization rate of the transmission power.

[0035] The front crawler motion structure 19 and the rear crawler motion structure 20 both include a pair of tail plates 11, a tail wheel 9, an idler wheel 8 and a crawler track 10. The front pair of tail plates 11 are rotatably connected between the inner side plate 3 and the front end of the middle side plate 2, and the rear pair of tail plates 11 are rotatably connected between the rear ends of the middle side plate 2 and the outer side plate 1. The idler wheel 8 and the tail wheel 9 are rotatably connected between the front and rear ends of the pair of tail plates 11, respectively. The front crawler track synchronous wheel 6, the corresponding idler wheel 8 and the tail wheel 9 are provided with crawler tracks 10, and the rear crawler track motion structure 20, the corresponding idler wheel 8 and the tail wheel 9 are provided with crawler tracks 10. When the power of the motor 4 drives the front crawler track synchronous wheel 6 and the rear crawler track synchronous wheel 7 to rotate in the same direction through the motor extension shaft 5; the front crawler track synchronous wheel 6 and the rear crawler track synchronous wheel 7 transmit the power to the idler wheel 8 and the tail wheel 9 in turn through the crawler track 10 connected thereto, thereby driving the operation of the entire front crawler motion structure 19 and the rear crawler motion structure 20.

[0036] Furthermore, tensioning blocks 21 are installed on both sides of a pair of tail plates 11, and the tensioning blocks 21 are used to adjust the tightness of the track 10. A pair of belt-pressing rollers 22 are also installed at the bottom of both sides of the power-assisted vehicle, and the pair of belt-pressing rollers 22 respectively press the track 10 at both ends. The tensioning blocks 21 arranged on both sides of the tail plates 11 are used to adjust the tightness of the track 10, and the belt-pressing rollers 22 can ensure the engagement of the track 10.

[0037] Furthermore, track slides 23 are fixedly installed at the bottom between a pair of tail plates 11 at the front and rear ends, between the inner plate 3 and the middle plate 2, and between the outer plate 1 and the middle plate 2. The track slides 23 cooperate with the corresponding tracks 10 to support the tracks 10 and provide support force with the ground or the stairwell.

[0038] It also includes an elevation adjustment mechanism for adjusting the elevation angles of the front crawler motion structure 19 and the rear crawler motion structure 20, the elevation adjustment mechanism includes a pair of electric push rods 17, one of the electric push rods 17 is rotatably connected to the inner side of the inner side plate 3 through a push rod fixed shaft 18, and the other electric push rod 17 is rotatably connected to the inner side of the rear end of the middle side plate 2 on the same side through the push rod fixed shaft 18, the telescopic end of the electric push rod 17 is connected to the corresponding tail plate 11 through a linkage assembly, the linkage assembly includes a linkage tube 12 rotatably connected between a pair of tail plates 11, one end of the linkage tube 12 is rotatably connected to the telescopic end of the electric push rod 17 through a linkage handle 13, the middle part of the linkage tube 12 is fixedly connected with a linkage tube swing arm 16, the end of the linkage tube swing arm 16 is rotatably connected with a balance bar 14, and balance bar connectors 15 are installed between the two ends of the balance bar 14 and the corresponding tail plate 11, the front crawler drive structure 19 and the rear crawler drive structure 20 are controlled in elevation by their own independent electric push rods 17, so that they can be suitable for different steps and steep slopes.

[0039] The crawler motion mechanism in the present invention is located on both sides of the vehicle, and the crawler running mechanism on each side is divided into two parts, a front crawler motion structure 19 and a rear crawler motion structure 20. The power of the front crawler motion structure 19 and the rear crawler motion structure 20 comes from the front crawler synchronous wheel 6 and the rear crawler synchronous wheel 7 located on the same motor extension shaft 5, and is directly powered by the motor 4 and the motor extension shaft 5; thereby improving the utilization rate of the transmission power.

[0040] The specific actions are as follows: when the power of the motor 4 drives the front crawler synchronous wheel 6 and the rear crawler synchronous wheel 7 to rotate in the same direction through the motor extension shaft 5; the front crawler synchronous wheel 6 and the rear crawler synchronous wheel 7 transmit the power to the idler wheel 8 and the tail wheel 9 in turn through the crawler 10 connected thereto, thereby driving the operation of the entire front crawler motion structure 19 and the rear crawler motion structure 20.

[0041] The tail ends of the front crawler motion structure 19 and the rear crawler motion structure located on both sides of the power-assisted vehicle are respectively provided with a tail plate 11 and a tail wheel 9. The tail wheel 9 is located at the end of the tail plate 11, and the tensioning blocks 21 arranged on both sides of the tail plate 11 are used to adjust the tightness of the crawler 10.

[0042] The tail wheel 9 and the tail plate 11 can be raised or lowered with the idler wheel 8 as the center of the circle. The specific actions are as follows: when the electric push rod 17 is pushed out and passes through the linkage handle 13 and linkage tube 12 connected thereto, the linkage tube swing arm 16 welded thereto is tilted in the opposite direction, and the balance bar 14 is moved upward under the action of the linkage tube swing arm 16, and at the same time, the balance bar connectors 15 at both ends and the rear end of the tail plate 11 are lifted. Due to the principle of leverage, the tail wheel 9 at the other end of the tail plate 11 moves downward, thereby making the front crawler motion structure 19 or the rear crawler motion structure 2 0 is flush with the ground; similarly, if the electric push rod 17 is retracted and the linkage handle 13 and linkage tube 12 connected thereto are used to make the linkage tube swing arm 16 welded thereto fall in the opposite direction, the balance bar 14 moves downward under the action of the linkage tube swing arm 16, and at the same time drives the balance bar connector 15 at both ends and the rear end of the tail plate 11 to fall. Due to the lever principle, the tail wheel 9 at the other end of the tail plate 11 is lifted upward, so that the front crawler motion structure 19 or the rear crawler motion structure 20 is tilted at a set angle, thereby achieving preparation before climbing the stairs.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A power transmission mechanism of a tracked power-assisted vehicle, comprising a pair of tracked motion mechanisms installed on both sides of the bottom of the power-assisted vehicle, characterized in that: The pair of crawler motion mechanisms each comprises a transmission frame, a front crawler motion structure (19) and a rear crawler motion structure (20), wherein the front crawler motion structure (19) and the rear crawler motion structure (20) are respectively mounted at the front and rear ends of the transmission frame; The transmission frame comprises an outer plate (1), a middle plate (2) and an inner plate (3), wherein the outer plate (1), the middle plate (2) and the inner plate (3) are fixedly mounted on the bottom of both sides of the power-assisted vehicle in sequence from the outside to the inside, the front crawler motion structure (19) is mounted on the front ends of the middle plate (2) and the inner plate (3), and the rear crawler motion structure (20) is mounted on the rear ends of the outer plate (1) and the middle plate (2); The crawler motion mechanism also includes a driving assembly mounted on the transmission frame, the driving assembly including a front crawler synchronous wheel (6) and a rear crawler synchronous wheel (7) that rotate synchronously and in the same direction, the front crawler synchronous wheel (6) and the rear crawler synchronous wheel (7) are used to synchronously drive the front crawler motion structure (19) and the rear crawler motion structure (20); The front crawler motion structure (19) and the rear crawler motion structure (20) both comprise a pair of tail plates (11), a tail wheel (9), an idler wheel (8) and a crawler track (10); the front pair of tail plates (11) are rotatably connected between the front ends of the inner side plate (3) and the middle side plate (2); the rear pair of tail plates (11) are rotatably connected between the rear ends of the middle side plate (2) and the outer side plate (1); the idler wheel (8) and the tail wheel (9) are rotatably connected between the front and rear ends of the pair of tail plates (11), respectively; the front crawler synchronous wheel (6), the corresponding idler wheel (8) and the tail wheel (9) are provided with a crawler track (10); the rear crawler motion structure (20), the corresponding idler wheel (8) and the tail wheel (9) are provided with a crawler track (10); It also includes an elevation angle adjustment mechanism capable of adjusting the elevation angles of the front crawler motion structure (19) and the rear crawler motion structure (20).

2. A power transmission mechanism for a tracked power-assisted vehicle according to claim 1, characterized in that: The middle side plate (2) is in an eight-shaped shape, and the outer side plate (1) and the inner side plate (3) correspond to the inner and outer sides of the middle side plate (2) respectively.

3. The power transmission mechanism of a tracked power-assisted vehicle according to claim 1, characterized in that: The drive assembly also includes a motor (4) fixedly mounted on the inner side of the inner plate (3); an output end of the motor (4) is connected to a motor extension shaft (5); and the front crawler synchronous wheel (6) and the rear crawler synchronous wheel (7) are both fixedly mounted on the motor extension shaft (5).

4. The power transmission mechanism of a tracked power-assisted vehicle according to claim 1, characterized in that: A pair of tensioning blocks (21) are installed on both sides of the tail plates (11), and the tensioning blocks (21) are used to adjust the tightness of the track (10). A pair of belt pressing wheels (22) are also installed on the bottom of both sides of the power-assisted vehicle, and the pair of belt pressing wheels (22) respectively press the track (10) at both ends.

5. The power transmission mechanism of a tracked power-assisted vehicle according to claim 1, characterized in that: Track slide plates (23) are fixedly installed at the bottom between a pair of tail plates (11) at the front and rear ends, between the inner plate (3) and the middle plate (2), and between the outer plate (1) and the middle plate (2), and the track slide plates (23) cooperate with the corresponding track (10).

6. The power transmission mechanism of a tracked power-assisted vehicle according to claim 1, characterized in that: The elevation angle adjustment mechanism comprises a pair of electric push rods (17), one of which is rotatably connected to the inner side of the inner side plate (3) via a push rod fixing shaft (18), and the other electric push rod (17) is rotatably connected to the inner side of the rear end of the middle side plate (2) on the same side via a push rod fixing shaft (18), and the telescopic end of the electric push rod (17) is connected to the corresponding tail plate (11) via a linkage assembly.

7. A power transmission mechanism for a tracked power-assisted vehicle according to claim 6, characterized in that: The linkage assembly comprises a linkage tube (12) rotatably connected between a pair of tail plates (11); one end of the linkage tube (12) is rotatably connected to the telescopic end of an electric push rod (17) through a linkage handle (13); a linkage tube swing arm (16) is fixedly connected to the middle of the linkage tube (12); the end of the linkage tube swing arm (16) is rotatably connected to a balance bar (14); and balance bar connectors (15) are installed between the two ends of the balance bar (14) and the corresponding tail plates (11).

8. A method for adjusting the movement of a crawler track, characterized in that: The following steps are involved: S1, the power of the motor (4) drives the front crawler synchronous wheel (6) and the rear crawler synchronous wheel (7) to rotate in the same direction through the motor extension shaft (5), and the front crawler synchronous wheel (6) and the rear crawler synchronous wheel (7) transmit the power to the idler wheel (8) and the tail wheel (9) in sequence through the crawler belt (10) connected thereto, thereby driving the operation of the entire front crawler motion structure (19) and the rear crawler motion structure (20); S2, when the electric push rod (17) is pushed out and passes through the linkage handle (13) and linkage tube (12) connected thereto, the linkage tube swing arm (16) welded thereto is tilted in the opposite direction, so that the balance rod (14) moves upward under the action of the linkage tube swing arm (16), and at the same time, the balance rod connectors (15) at both ends and the rear end of the tail plate (11) are lifted up. Due to the principle of leverage, the tail wheel (9) at the other end of the tail plate (11) moves downward, so that the front crawler motion structure (19) or the rear crawler motion structure (20) is flush with the ground; S3, the electric push rod (17) is retracted and the linkage handle (13) and linkage tube (12) connected thereto are used to make the linkage tube swing arm (16) welded thereto fall in the opposite direction, so that the balance bar (14) moves downward under the action of the linkage tube swing arm (16), and at the same time, the balance bar connectors (15) at both ends and the rear end of the tail plate (11) fall down. Due to the principle of leverage, the tail wheel (9) at the other end of the tail plate (11) is lifted upward, so that the front crawler motion structure (19) or the rear crawler motion structure (20) is tilted at a set angle, so as to achieve preparation before climbing stairs.

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