Mechanical brake mechanism for tricycle

Abstract

The utility model provides a kind of tricycle mechanical brake mechanism, it is related to vehicle braking technical field, the utility model includes brake pedal assembly, brake pull rod, rocker, rocker shaft and brake shoe, brake pedal assembly is assembled in the front end of frame, the both ends of brake pedal assembly are connected to the rocker rear of frame by two groups of parallel brake pull rod, the upper end of rocker is connected with rocker shaft, and the outer end of rocker shaft extends to brake drum to control brake shoe to open and thus realize whole vehicle braking;The utility model solves the problem of large brake gap and slow brake response caused by many intermediate connecting pieces, many types and many pin shaft connections in the conventional brake system of prior art.

Description

Technical Field

[0001] This utility model relates to the field of vehicle braking technology, and in particular to a mechanical braking mechanism for a three-wheeled vehicle. Background Technology

[0002] The current electric tricycles generally use a brake distribution shaft located in the middle of the frame for braking. The rocker arm in the middle of the brake distribution shaft is connected to the brake pedal via a tie rod, and the rocker arms on both sides are connected to the brake rocker arms on the rear axle via tie rods, as shown in patent CN219215294U. Figure 1 As shown, due to the large number of intermediate connecting parts in this system, the braking gap in the braking system is large, resulting in slow braking response and poor braking effect. At the same time, tedious debugging is required to ensure the reliability of the braking effect of the entire system. In order to solve the above problems, a braking mechanism with fast braking response and simple structure is proposed to solve the problems existing in the prior art. Utility Model Content

[0003] To address the aforementioned problems, this utility model proposes a mechanical braking mechanism for tricycles to solve the problems of numerous intermediate connecting parts, various types, and large braking gaps and slow braking response caused by the large number of pin connections in existing traditional braking systems.

[0004] To achieve the purpose of this utility model, the utility model is implemented through the following technical solution: a mechanical braking mechanism for a three-wheeled vehicle, including a brake pedal assembly, a brake lever, a rocker arm, a rocker arm shaft, and brake shoes. The brake pedal assembly is mounted on the front end of the vehicle frame. The two ends of the brake pedal assembly are connected to the rocker arm at the rear of the vehicle frame through two sets of parallel brake levers. The upper end of the rocker arm is connected to the rocker arm shaft, and the outer end of the rocker arm shaft extends into the brake drum to control the expansion of the brake shoes, thereby achieving vehicle braking. An axle is provided at the rear end of the frame. At both ends of the axle's outer wall are rocker arm brackets for supporting the rocker arm shaft. The two sets of rocker arms are controlled to rotate synchronously by the brake pedal assembly, thereby controlling the left and right wheels to brake simultaneously.

[0005] A further improvement is that the brake pedal assembly includes a round tube, a brake pedal, and a brake pedal rocker arm. The round tube is rotatably connected to the front end of the bottom of the vehicle frame through three sets of brake pedal mounting brackets. The brake pedal is welded to the outer wall of the round tube through a bent tube. Two sets of brake pedal rocker arms are set at a certain angle at both ends of the outer wall of the round tube, and the brake pedal assembly is connected to two sets of parallel brake levers through the two sets of brake pedal rocker arms.

[0006] A further improvement is that a handbrake cable bracket is provided on the frame near the brake pedal rocker arm, and a handbrake cable is provided through the handbrake cable bracket. The front end of the handbrake cable is connected to the vehicle's handbrake braking system, and the rear end is connected to the brake pedal rocker arm. The handbrake cable, the brake pedal rocker arm on the same side, and the brake lever on the same side are on the same axis in the same length direction.

[0007] A further improvement is that a return spring is connected to the upper end of the brake pedal rocker arm near the handbrake cable, and the other end of the return spring is connected to the vehicle frame. The brake pedal assembly is returned to its initial position by the return spring.

[0008] A further improvement is that the brake pedal rocker arm is provided with an upper hole and a lower hole, the brake lever and the rear end of the handbrake cable are both connected to the upper hole via a pin, and the front end of the return spring is hooked in the lower hole.

[0009] A further improvement is that a set of brake levers is connected to the upper hole on the brake pedal rocker arm on the side away from the brake pedal, and the lower hole is used to install a brake power-off switch.

[0010] A further improvement is that the frame is provided with a brake pedal limiter for limiting the brake pedal assembly, preventing the brake pedal assembly from rotating excessively, thereby preventing the rocker arm shaft from rotating in the opposite direction to achieve reverse braking.

[0011] A further improvement is that the rocker arm and the rocker arm shaft are connected by a spline.

[0012] A further improvement is that: the rocker arm shaft extends into the brake drum and is fitted with a flat drive block; the brake shoes are semi-circular and symmetrically arranged in two sets, rotatably mounted in the brake drum; the ends of the two sets of brake shoes away from the rotation axis are provided with bends and chamfers, which are close to the two sides of the drive block; the rotation of the drive block drives the two sets of brake shoes to expand outward and generate mechanical friction with the inner wall of the brake drum, thereby achieving vehicle braking.

[0013] A further improvement is that push-pull rods are hinged to both ends of the outer wall of the axle, and the other end of the push-pull rods is hinged to the lower end of the frame. A leaf spring seat is also installed on the outer wall of the axle, and the rocker arm shaft is located between the leaf spring seat and the push-pull rod seat.

[0014] The beneficial effects of this utility model are as follows: The braking mechanism mainly consists of a brake pedal assembly, two sets of brake levers, two sets of rocker arms, rocker arm shafts on both sides, and brake shoes, forming a simple braking structure; it solves the problems of large braking gaps and slow braking response caused by numerous intermediate connecting parts, various types, and a large number of pin connections in traditional braking systems; it achieves quick production and assembly, fast braking response, and a parallel symmetrical brake lever layout, realizing a uniform distribution of braking force between the left and right wheels; it simplifies the product in terms of the number of parts and production processes, and improves product performance; when necessary, the parts of this system can be converted into mechanical structural components for pneumatic brakes. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of existing technology.

[0016] Figure 2 This is a three-dimensional view of the present invention.

[0017] Figure 3 This is a structural diagram of the brake pedal assembly of this utility model.

[0018] Figure 4 This is a detailed drawing of the rear axle section of this utility model.

[0019] Figure 5 This is a schematic diagram of the internal structure of the brake drum of this utility model.

[0020] Figure 6 This is a three-dimensional perspective view of the present invention.

[0021] Figure 7 This is a diagram of the braking system of this utility model.

[0022] The components are as follows: 1. Brake pedal assembly; 2. Brake lever; 3. Rocker arm; 4. Rocker arm shaft; 5. Brake shoe; 6. Frame; 7. Brake drum; 8. Axle; 9. Rocker arm shaft bracket; 10. Handbrake cable bracket; 11. Round tube; 12. Brake foot pedal; 13. Brake pedal rocker arm; 14. Brake pedal mounting bracket; 101. Handbrake cable; 102. Return spring; 103. Brake pedal limiter; 71. Drive block; 81. Push-pull rod; 82. Leaf spring seat; 83. Push-pull rod seat. Detailed Implementation

[0023] To deepen the understanding of this utility model, the following detailed description will be provided in conjunction with embodiments. These embodiments are only used to explain this utility model and do not constitute a limitation on the scope of protection of this utility model.

[0024] according to Figure 2-7As shown, this embodiment proposes a solution: a mechanical braking mechanism for a three-wheeled vehicle, including a brake pedal assembly 1, a brake lever 2, a rocker arm 3, a rocker arm shaft 4, and brake shoes 5. The brake pedal assembly 1 is mounted on the front end of the frame 6. The two ends of the brake pedal assembly 1 are connected to the rocker arm 3 at the rear of the frame 6 through two sets of parallel brake levers 2. The upper end of the rocker arm 3 is connected to the rocker arm shaft 4. The outer end of the rocker arm shaft 4 extends into the brake drum 7 to control the expansion of the brake shoes 5, thereby achieving vehicle braking.

[0025] The brake pedal assembly 1 includes a round tube 11, a brake pedal 12, and a brake pedal rocker arm 13. The round tube 11 is rotatably connected to the front end of the bottom of the frame 6 through three sets of brake pedal mounting brackets 14. The brake pedal 12 is welded to the outer wall of the round tube 11 through a bent tube. Two sets of brake pedal rocker arms 13 are set at a certain angle at both ends of the outer wall of the round tube 11, and the brake pedal assembly 1 is connected to two sets of parallel brake levers 2 through the two sets of brake pedal rocker arms 13 respectively.

[0026] The rear end of the frame 6 is provided with an axle 8. The two ends of the outer wall of the axle 8 are respectively equipped with rocker arm shaft brackets 9 for supporting the rocker arm shaft 4. The two rocker arms 3 are controlled to rotate synchronously by the brake pedal assembly 1, thereby controlling the left and right wheels to brake simultaneously.

[0027] In this embodiment, the rocker arm shaft 4 extends into the brake drum 7 and is fitted with a flat drive block 71. The brake shoes 5 are semi-circular and arranged in two sets in a mirror symmetrical manner. The brake shoes 5 are rotated and installed in the brake drum 7. The ends of the two sets of brake shoes 5 away from the rotation axis are provided with bends and chamfers, which are close to the two sides of the drive block 71. Specifically, when braking, by pressing the brake pedal 12, the circular tube 11 is rotated. At the same time as the circular tube 11 rotates, the top of the brake pedal rocker arm 13 moves forward, thereby driving the brake lever 2 to move forward. At the same time, the rear end of the brake lever 2 drives the rocker arm 3 to rotate around the rocker arm shaft 4. The rotating rocker arm shaft 4 drives the drive block 71 to rotate, thereby causing the two sets of brake shoes 5 to expand outward and generate mechanical friction with the inner wall of the brake drum 7, thereby achieving vehicle braking.

[0028] A handbrake cable bracket 10 is provided on the frame 6 near the brake pedal rocker arm 13. A handbrake cable 101 is provided through the handbrake cable bracket 10. The front end of the handbrake cable 101 is connected to the vehicle's handbrake braking system, and the rear end is connected to the brake pedal rocker arm 13. The handbrake cable 101, the brake pedal rocker arm 13 on the same side, and the brake lever 2 on the same side are on the same axis in the same length direction.

[0029] In this embodiment, the handbrake cable 101 and the foot brake are on the same side and on the same axis in the same length direction, which can ensure the synchronicity and multi-functional braking of the handbrake and foot brake. If the two are not connected to the brake pedal rocker arm 13 on the same side, braking deviation and neutral gap may occur.

[0030] A return spring 102 is connected to the upper end of the brake pedal rocker arm 13 near the handbrake cable 101. The other end of the return spring 102 is connected to the frame 6. The brake pedal assembly 1 is returned to its initial position by the return spring 102.

[0031] In this embodiment, the reset mechanism is a reset spring, and the reset spring, foot brake, and handbrake are all on the same side, which can achieve better synchronization and reduce neutral error, thus improving the product performance.

[0032] The brake pedal rocker arm 13 is provided with an upper hole and a lower hole. The brake lever 2 and the rear end of the handbrake cable 101 are both connected to the upper hole via a pin. The front end of the return spring 102 is hooked in the lower hole. A set of brake levers 2 are connected to the upper hole on the side of the brake pedal rocker arm 13 away from the brake pedal 12. The lower hole is used to install the brake power-off switch.

[0033] The frame 6 is equipped with a brake pedal limiter 103 for limiting the brake pedal assembly 1 to prevent the brake pedal assembly 1 from rotating excessively, thereby preventing the rocker arm shaft 4 from rotating in the opposite direction to achieve reverse braking. The rocker arm 3 and the rocker arm shaft 4 are connected by a spline.

[0034] In this embodiment, the advantage of the spline connection is that when the angles of the two sets of rocker arms 3 are inconsistent, the angles of the two sets of rocker arms 3 can be readjusted to achieve consistency; and when they are already synchronized, it is convenient to readjust the tilt angle of the rocker arms 3 to adapt to the initial position of the brake pedal 12.

[0035] Push-pull rods 81 are hinged to both ends of the outer wall of the axle 8. The other end of the push-pull rods 81 is hinged to the lower end of the frame 6. A leaf spring seat 82 is also mounted on the outer wall of the axle 8. The rocker arm shaft 4 is located between the leaf spring seat 82 and the push-pull rod seat 83.

[0036] In this embodiment, the length of the rocker arm shaft 4 is designed to be different according to the spatial layout. The position is more reasonable between the leaf spring seat 82 and the push-pull rod seat 83. The spatial layout is better without affecting braking interference.

[0037] This technical solution is a brake pedal assembly with a function of uniform braking force distribution. Compared with traditional braking, the uniformity is more synchronized. The brake pedal assembly integrates the front / rear brakes, return springs, and brake power-off switches into one unit. The length of the lever is extended and it is directly connected from the axle to the brake pedal assembly, reducing intermediate connecting parts and simplifying the structure. The rocker arm shaft on the axle is designed with an extended length so that it does not interfere with surrounding parts, while still satisfying the function of braking force transmission.

[0038] This braking mechanism mainly consists of a brake pedal assembly 1, two sets of brake levers 2, two sets of rocker arms 3, rocker arm shafts on both sides 4, and brake shoes 5, forming a simple braking structure. It solves the problems of large braking gaps and slow braking response caused by numerous intermediate connecting parts, many types, and a large number of pin connections in traditional braking systems. It achieves quick production and assembly, fast braking response, and a parallel symmetrical brake lever layout 2, realizing a uniform distribution of braking force between the left and right wheels. It simplifies the product in terms of the number of parts and production processes, and improves product performance. When necessary, the parts of this system can be converted into mechanical structural components for pneumatic brakes.

[0039] 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 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 mechanical braking mechanism for a tricycle, comprising a brake pedal assembly (1), a brake lever (2), a rocker arm (3), a rocker arm shaft (4), and brake shoes (5), characterized in that: The brake pedal assembly (1) is mounted on the front end of the frame (6). The two ends of the brake pedal assembly (1) are connected to the rocker arm (3) at the rear of the frame (6) through two sets of parallel brake levers (2). The upper end of the rocker arm (3) is connected to the rocker arm shaft (4). The outer end of the rocker arm shaft (4) extends into the brake drum (7) to control the brake shoes (5) to expand, thereby realizing the braking of the whole vehicle. The rear end of the frame (6) is provided with an axle (8). The two ends of the outer wall of the axle (8) are respectively equipped with rocker arm shaft brackets (9) for supporting the rocker arm shaft (4). The two sets of rocker arms (3) are controlled to rotate synchronously by the brake pedal assembly (1), thereby controlling the left and right wheels to brake simultaneously.

2. The mechanical braking mechanism for a tricycle according to claim 1, characterized in that: The brake pedal assembly (1) includes a round tube (11), a brake pedal (12) and a brake pedal rocker arm (13). The round tube (11) is rotatably connected to the front end of the bottom of the frame (6) through three sets of brake pedal mounting brackets (14). The brake pedal (12) is welded to the outer wall of the round tube (11) through a bent tube. Two sets of brake pedal rocker arms (13) are set at a certain angle at both ends of the outer wall of the round tube (11). The brake pedal assembly (1) is connected to two sets of parallel brake levers (2) through the two sets of brake pedal rocker arms (13).

3. A mechanical braking mechanism for a tricycle according to claim 2, characterized in that: A handbrake cable bracket (10) is provided on the frame (6) near the brake pedal rocker arm (13). A handbrake cable (101) is provided through the handbrake cable bracket (10). The front end of the handbrake cable (101) is connected to the vehicle handbrake system, and the rear end is connected to the brake pedal rocker arm (13). The handbrake cable (101), the brake pedal rocker arm (13) on the same side, and the brake lever (2) on the same side are on the same axis in the same length direction.

4. A mechanical braking mechanism for a tricycle according to claim 3, characterized in that: A return spring (102) is connected to the upper end of the brake pedal rocker arm (13) near the handbrake cable (101). The other end of the return spring (102) is connected to the frame (6). The brake pedal assembly (1) is returned to its initial position by the return spring (102).

5. A mechanical braking mechanism for a tricycle according to claim 4, characterized in that: The brake pedal rocker arm (13) is provided with an upper hole and a lower hole. The brake lever (2) and the rear end of the handbrake cable (101) are both connected to the upper hole via a pin. The front end of the reset spring (102) is hooked in the lower hole.

6. A mechanical braking mechanism for a tricycle according to claim 4, characterized in that: A set of brake levers (2) are connected to the upper hole on the brake pedal rocker arm (13) on the side away from the brake pedal (12), and the lower hole is used to install the brake power-off switch.

7. A mechanical braking mechanism for a tricycle according to claim 2, characterized in that: The frame (6) is provided with a brake pedal limiter (103) for limiting the brake pedal assembly (1) to prevent the brake pedal assembly (1) from rotating excessively, thereby preventing the rocker arm shaft (4) from rotating in the opposite direction to achieve reverse braking.

8. A mechanical braking mechanism for a tricycle according to claim 1, characterized in that: The rocker arm (3) and the rocker arm shaft (4) are connected by a spline.

9. A mechanical braking mechanism for a tricycle according to claim 1, characterized in that: The rocker arm shaft (4) extends into the brake drum (7) and is fitted with a flat drive block (71). The brake shoes (5) are semi-circular and mirror-symmetrically arranged in two sets, which are rotatably installed in the brake drum (7). The ends of the two sets of brake shoes (5) away from the rotation axis are provided with bends and chamfers, which are close to the two sides of the drive block (71). By rotating the drive block (71), the two sets of brake shoes (5) are driven to expand outward and generate mechanical friction with the inner wall of the brake drum (7), thereby achieving vehicle braking.

10. A mechanical braking mechanism for a tricycle according to claim 1, characterized in that: Push-pull rods (81) are hinged at both ends of the outer wall of the axle (8), and the other end of the push-pull rods (81) is hinged to the lower end of the frame (6). A leaf spring seat (82) is also mounted on the outer wall of the axle (8), and the rocker arm shaft (4) is located between the leaf spring seat (82) and the push-pull rod seat (83).

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