Electric tricycle pedal brake

Abstract

The utility model relates to brake device technical field, especially a foot brake of electric tricycle, including footrest pole, fixed in the one end of footrest pole's link pull, with link pull hook hook connection's pull rod, slide sleeve connection on the pull rod's rocker, with the end of rocker through second pivot fixed's dial block, with dial block abut two arc -shaped plates and be used for accommodating arc -shaped plate's casing, link pull is through first pivot rotation connection in the bottom of carriage, and two arc -shaped plates are away from with dial block abut one end through third pivot and casing rotation connection, and two arc -shaped plates close dial block one end still through connecting spring connection, and the bottom of carriage still is fixedly connected with arc -shaped guide rod, and the center of arc -shaped guide rod is on first pivot, and it realizes the reset force of increasing footrest pole through setting arc -shaped guide rod, reset spring of setting on arc -shaped guide rod and cooperation in the hole of setting on arc -shaped guide rod.

Description

Technical Field

[0001] This utility model relates to the field of braking device technology, and in particular to a foot-operated brake for an electric tricycle. Background Technology

[0002] The braking system of an electric tricycle is generally a foot-operated brake. By pressing the foot pedal, the pedal rotates around the axis of a connecting lever. As the lever rotates, it moves a pull rod, which in turn pulls a rocker arm to rotate around the axis of a lever. The rotating lever pushes one end of two arc-shaped discs outwards (the other end of the discs is rotatably connected to the housing via a second shaft). A connecting spring between the two levers stores elastic potential energy. When the two arc-shaped discs contact the wheel, braking is achieved. When the rider's foot leaves the brake pedal, the two arc-shaped discs return to their original position under the action of the connecting spring, simultaneously moving the lever back to its original position. The lever then moves the rocker arm, which in turn drives the pull rod in the opposite direction. The pull rod transmits power to the connecting lever. The lever, when engaged, causes the foot pedal to reset. This describes the principle of braking and resetting in existing tricycles. A problem with existing technology is that the connecting spring in current tricycles is located inside the housing, and its limited size restricts the stored elastic potential energy. If severe wear occurs between the arc-shaped disc and the second pivot, causing a jam, or if the lever becomes stuck in the housing, the stored elastic potential energy of the connecting spring is insufficient to overcome the resistance, resulting in the foot pedal not returning to its original position. This condition leads to a constant braking effect during riding, wasting electricity and easily causing wear on the arc-shaped disc. Therefore, a foot-operated brake for electric tricycles needs to be designed to solve these problems. Utility Model Content

[0003] This utility model provides a foot-operated brake for electric tricycles to solve the problem mentioned in the background art that the foot pedal does not rebound due to insufficient rebound force in existing tricycle foot-operated brakes.

[0004] The technical problem solved by this utility model is achieved by the following technical solution:

[0005] This utility model provides a foot pedal brake for an electric tricycle, including a foot pedal, a connecting plate fixed to one end of the foot pedal, a pull rod hooked to the connecting plate, a rocker arm slidably sleeved on the pull rod, a lever fixed to the end of the rocker arm via a second rotating shaft, two arc-shaped discs abutting against the lever, and a housing for accommodating the arc-shaped discs. The connecting plate is rotatably connected to the bottom of the vehicle body via a first rotating shaft. The ends of the two arc-shaped discs away from the lever are rotatably connected to the housing via a third rotating shaft. The ends of the two arc-shaped discs near the lever are also connected by a connecting spring. An arc-shaped guide rod is also fixedly connected to the bottom of the vehicle body. The center of the arc-shaped guide rod is located on the first rotating shaft. A return spring is also sleeved on the outside of the arc-shaped guide rod. A hole is opened on the foot pedal, and the free end of the arc-shaped guide rod passes through the hole.

[0006] Preferably, it also includes a positioning block for adjusting the position of the end of the reset spring, and the arc-shaped guide rod is also provided with holes for installing the positioning block. The positioning block has multiple holes, and the multiple holes are evenly distributed at intervals.

[0007] Preferably, the positioning block includes a male buckle body and a female buckle body, wherein the male buckle body passes through the hole and connects with the female buckle body to achieve installation at the hole position.

[0008] Preferably, the male buckle body includes a protruding part and an insertion part, the insertion part is provided with a spring clip, and the female buckle body is a sleeve body with a clip hole that mates with the spring clip.

[0009] Preferably, the end of the pull rod has a threaded portion, a nut is provided on the threaded portion, and the pull rod also has a protrusion near the end, with a positioning spring between the protrusion and the rocker arm.

[0010] The beneficial effects of this utility model are: by setting an arc-shaped guide rod, a return spring sleeved on the arc-shaped guide rod, and opening holes in the arc-shaped guide rod, the return force of the foot pedal is increased.

[0011] By creating holes in the arc-shaped guide rod to cooperate with the positioning block, the reset force provided by the reset spring can be adjusted. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0013] Figure 1 This is a front view of the prior art of this utility model;

[0014] Figure 2 This is a rear view of the prior art of this utility model;

[0015] Figure 3 This is a first perspective view of the improved version of this utility model;

[0016] Figure 4 This is a second perspective view of the improved version of this utility model;

[0017] Figure 5 This is a schematic diagram of the arc-shaped guide rod, the return spring, and the positioning block of this utility model;

[0018] Figure 6 This utility model Figure 5 A schematic diagram of the disassembled positioning block.

[0019] In the diagram, 1. Foot pedal; 2. Connecting lever; 3. First pivot; 4. Pull rod; 5. Threaded part; 6. Nut; 7. Rocker arm; 8. Second pivot; 9. Housing; 10. Pulley; 11. Third pivot; 12. Arc-shaped disc; 13. Connecting spring; 14. Positioning spring; 15. Carriage; 16. Arc-shaped guide rod; 17. Return spring; 18. Hole; 19. Positioning block; 20. Male buckle; 21. Female buckle; 22. Buckle hole; 23. Protruding part; 24. Insertion part; 25. Spring clip. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0021] refer to Figure 1 and Figure 2The existing foot-operated brake structure for electric tricycles includes a foot pedal 1, a connecting lever 2 fixed to one end of the foot pedal 1, a pull rod 4 hooked to the connecting lever 2, a rocker arm 7 slidably sleeved on the pull rod 4, a lever 10 fixed to the end of the rocker arm 7 via a second pivot 8, two arc-shaped discs 12 abutting against the lever 10, and a housing 9 for accommodating the arc-shaped discs 12. The connecting lever 2 is rotatably connected to the bottom of the carriage 15 via a first pivot 3. The ends of the two arc-shaped discs 12 away from the lever 10 are connected to the housing via a third pivot 11. The body 9 is rotatably connected, and the two arc-shaped discs 12 are also connected by a connecting spring 13 near the end of the lever 10. In the specific working process, the person steps down the foot pedal 1, and the foot pedal 1 drives the connecting plate 2 to rotate along the first rotating shaft 3 connected to the carriage 15 (the direction of rotation is along the arrow direction of F1 in the attached figure). During the rotation of the connecting plate 2, it will drive the pull rod 4 to move in the direction of F2. The pull rod 4 F2 will drive the rocker arm 7 to rotate along the axis of the second rotating shaft 8 in the attached figure, that is, in the direction of F3. The rocker arm 7 rotates in the surrounding area. During the rotation around the axis, the second pivot 8 drives the lever 10 to rotate (one end of the rocker arm 7 is integrated with the second pivot 8 and the lever 10, and the second pivot 8 passes through the housing 9). During the rotation, the lever 10 pushes one end of the two arc-shaped discs 12 to move outward from the housing 9, thus achieving the braking action (common drum brake structure). When the two arc-shaped discs 12 move, they rotate along the third pivot 11, i.e., in the direction of F4 in the attached diagram. When the two arc-shaped discs 12 move away from each other, the connecting spring 13 stores elastic potential energy. When the user's foot leaves the pedal lever 1, the connecting spring 13 releases the elastic potential energy, and the pedal lever 1 returns to its original position. Due to the fact that after long-term use, the existing electric tricycle pedal brake structure may experience wear on the first pivot 3, the second pivot 8, the third pivot 11, and the lever 10 and the arc-shaped discs 12, resulting in increased return resistance of each component, thus causing the pedal lever 1 to not return to its original position. This state will result in a constant braking effect during riding, which not only wastes electricity but also easily leads to wear on the arc-shaped discs 12.

[0022] refer to Figures 3-6 Based on the above, the present invention makes the following improvements: an arc-shaped guide rod 16 is fixedly connected to the bottom of the carriage 15, the center of the arc-shaped guide rod 16 is located on the first rotating shaft 3, and a return spring 17 is sleeved on the outside of the arc-shaped guide rod 16. A hole 18 is opened on the foot pedal 1, and the free end of the arc-shaped guide rod 16 passes through the hole 18. By setting the arc-shaped guide rod 16 and the return spring 17, the return capability of the foot pedal 1 and the two arc-shaped discs 12 can be increased, solving the problem that the existing electric tricycle has poor return capability due to relying only on the connecting spring 13 (installed in the housing 9, which is limited in size and has a small stored elastic potential energy).

[0023] refer to Figures 5-6Furthermore, it also includes a positioning block 19 for adjusting the position of the end of the return spring 17. The arc-shaped guide rod 16 is also provided with holes 18 for installing the positioning block 19. There are multiple holes 18 on the positioning block 19, and the multiple holes 18 are evenly distributed. By cooperating with the holes 18, the position of the end of the return spring 17 can be fixed. When the positioning block 19 cooperates with different holes, the positioning position of the end of the spring is different, and the degree of compression of the return spring 17 is also different, thereby changing the stored elastic potential energy. That is, the closer the hole 18 is to the end of the arc-shaped guide rod 16 that connects to the carriage 15, the greater the stored elastic potential energy when the foot pedal 1 is pressed. At the same time, the positioning block 19 can be adjusted to cooperate with different holes 18, and the position of the end of the return spring 17 can be readjusted when the spring is fatigued, so as to solve the problem of elastic fatigue.

[0024] Furthermore, the positioning block 19 includes a male buckle 20 body and a female buckle 21 body. The male buckle 20 body passes through the hole 18 and connects with the female buckle 21 body to be installed at the position of the hole 18. Through the cooperation of the male buckle 20 body and the female buckle 21 body, it can be easily disassembled and installed, and can be quickly matched with different holes 18.

[0025] Furthermore, the male buckle 20 body includes a protruding part 23 and an insertion part 24, and the insertion part 24 is provided with a spring clip. The female buckle 21 body is a sleeve with a clip hole 22 that mates with the spring clip. The locking method between the male buckle 20 and the female buckle 21 adopts the engagement of the spring clip and the clip hole 22, which makes it more convenient to disassemble and install without the need for additional tools.

[0026] refer to Figure 3 Furthermore, the end of the pull rod 4 has a threaded portion 5, on which a nut 6 is provided. Near the end of the pull rod 4, there is also a protrusion, and a positioning spring 14 is provided between the protrusion and the rocker arm 7. By adjusting the position of the nut 6, the initial angle of the rocker arm 7 can be adjusted, i.e., the initial angle of the lever 10 can be adjusted. This is suitable for situations where the arc-shaped disc 12 wears down after long-term braking, resulting in decreased sensitivity. By adjusting the initial angle of the lever 10, the braking sensitivity can be adjusted. This adjustment method is consistent with existing adjustment methods and is also applicable to the solution of this utility model.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above-described embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A foot-operated brake for an electric tricycle, comprising a foot pedal (1), a connecting plate (2) fixed to one end of the foot pedal (1), a pull rod (4) hooked to the connecting plate (2), a rocker arm (7) slidably sleeved on the pull rod (4), a lever (10) fixed to the end of the rocker arm (7) via a second pivot (8), two arc-shaped discs (12) abutting against the lever (10), and a housing (9) for accommodating the arc-shaped discs (12), wherein the connecting plate (2) is rotatably connected to the bottom of the carriage (15) via a first pivot (3), the ends of the two arc-shaped discs (12) away from the lever (10) are rotatably connected to the housing (9) via a third pivot (11), and the ends of the two arc-shaped discs (12) near the lever (10) are also connected by a connecting spring (13), characterized in that, The bottom of the carriage (15) is also fixedly connected to an arc-shaped guide rod (16), the center of the arc-shaped guide rod (16) is located on the first rotating shaft (3), and a reset spring (17) is also sleeved on the outside of the arc-shaped guide rod (16). A hole (18) is opened on the foot pedal (1), and the free end of the arc-shaped guide rod (16) passes through the hole (18).

2. The foot-operated brake for an electric tricycle according to claim 1, characterized in that, It also includes a positioning block (19) for adjusting the position of the end of the reset spring (17). The arc-shaped guide rod (16) is also provided with holes (18) for installing the positioning block (19). The number of holes (18) on the positioning block (19) is multiple, and the multiple holes (18) are evenly distributed at intervals.

3. The foot-operated brake for an electric tricycle according to claim 2, characterized in that, The positioning block (19) includes a male buckle (20) body and a female buckle (21) body. The male buckle (20) body passes through the hole (18) and connects with the female buckle (21) body to be installed in the hole (18) position.

4. The foot-operated brake for an electric tricycle according to claim 3, characterized in that, The male buckle (20) body includes a protruding part (23) and an insertion part (24), the insertion part (24) is provided with a spring buckle, and the female buckle (21) body is a sleeve with a buckle hole (22) that cooperates with the spring buckle.

5. A foot-operated brake for an electric tricycle according to claim 1, characterized in that, The end of the pull rod (4) has a threaded part (5), and a nut (6) is provided on the threaded part (5). The pull rod (4) also has a protrusion near the end, and a positioning spring (14) is provided between the protrusion and the rocker arm (7).

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