Automatic brake structure, bicycle trailer and bicycle equipped with the same

Abstract

The present invention provides an automatic brake structure for braking a bicycle trailer. A pair of trailer wheel axles of the bicycle trailer are coaxially connected through a trailer transverse axis. The trailer transverse axis can drive a pair of trailer wheels to roll forward under the traction of an external force. The automatic brake structure is assembled on the trailer transverse axis and arranged on the inner side of the trailer wheel. It includes a brake pad, a clutch pad, a clutch pad spring, a sliding block, a guide rod, a guide rod spring, and a wedge block. The wedge block can slide along the radial direction of the trailer transverse axis, or slide backward to press the clutch pad against the inclined surface to fit with the brake pad, thereby forming a braking state for the trailer wheel, or slide forward to separate the inclined surface from the clutch pad, thereby releasing the braking state. The present invention also proposes a bicycle trailer and a bicycle provided with the automatic brake structure. There is no need to provide additional braking power for the bicycle trailer. The structure is simple, the cost is low, and the use effect is good.

Description

Technical Field

[0001] The invention relates to a bicycle, and more particularly to an automatic brake structure and a bicycle trailer and a bicycle provided with the automatic brake structure. Background Art

[0002] As a low-carbon means of transportation, bicycles have become increasingly popular in recent years, especially among young people in Europe and the United States. When people need to carry some luggage on a short trip, it is inconvenient to rely on bicycles alone, and they often need to add a trailer to the bicycle. Bicycle trailers are easy to assemble and disassemble, but their size and weight are larger than bicycles, and generally bicycle trailers do not have brake devices. When the bicycle brakes, the trailer has a large inertia, which can easily cause the bicycle to brake for a longer distance, or even fail to stop the bicycle, resulting in a safety accident. Summary of the invention

[0003] The present invention aims to solve the above technical problems at least to a certain extent. To this end, the present invention proposes an automatic braking structure and a bicycle trailer and a bicycle equipped with the same, which automatically brakes by utilizing the inertia generated by the bicycle trailer when the bicycle body brakes, without providing additional braking power for the bicycle trailer, and has a simple structure, low cost and good use effect.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] An automatic brake structure, the structural features of which are:

[0006] Used for braking a bicycle trailer, wherein a pair of trailer wheel axles of the bicycle trailer are coaxially connected via a trailer transverse axis, and the trailer transverse axis can drive a pair of trailer wheels to roll forward under external traction; the automatic brake structure is assembled on the trailer transverse axis and is arranged on the inner side of the trailer wheel, and comprises a brake pad, a clutch pad, a clutch pad spring, a sliding block, a guide rod, a guide rod spring, and a wedge block;

[0007] The wedge block and the sliding block are arranged along the radial direction of the trailer transverse axis, and are respectively arranged at the front and rear sides of the trailer transverse axis. The rear end of the wedge block is fixedly connected to the front end of the sliding block, and the integral structure is formed with a slide groove arranged along the radial direction, and is slidably sleeved on the trailer transverse axis along the radial direction of the trailer transverse axis and front and back through the slide groove. The wedge block is wide at the front and narrow at the rear, and the side facing the trailer wheel is an inclined surface;

[0008] The guide rod is fixed on the trailer transverse axis, movably penetrates the wedge block, extends forward along the radial direction of the trailer transverse axis, and is exposed outside the wedge block. A guide rod spring is mounted on the rod section in the slide groove. The guide rod spring is in a compressed state in the initial state and is tensioned between the wedge block and the trailer transverse axis.

[0009] The brake pad is fixedly installed on the inner side of the trailer wheel and forms a synchronous rotating component with the trailer wheel;

[0010] Between the wedge block and the brake pad, the clutch disc is slidably sleeved on the trailer cross shaft along the axial direction through a sliding sleeve, and is tensioned with the brake pad by a clutch disc spring sleeved on the trailer cross shaft. In the initial state, the clutch disc spring is in a compressed state, and the clutch disc is separated from the brake pad;

[0011] The wedge block of the automatic braking structure can slide along the radial direction of the trailer cross shaft or backward to abut the clutch disc against the brake pad with an inclined surface to form a braking state for the trailer wheel, or slide forward to separate the inclined surface from the clutch disc to form the release of the braking state.

[0012] The structural feature of the present invention also lies in:

[0013] The brake pad is made of cast iron and is fixedly installed on the inner side of the trailer wheel through bolts.

[0014] The sliding sleeve is a copper sleeve.

[0015] Both the sliding block and the wedge block are made of metal and are fixedly connected by bolts.

[0016] A central hole for the guide rod to pass through is provided on the wedge block.

[0017] The guide rod is made of metal.

[0018] The present invention also proposes a bicycle trailer. The axles of the two trailer wheels of the bicycle trailer are coaxially connected through a trailer cross shaft. On the trailer cross shaft, inside a pair of trailer wheels, an automatic braking structure as described above is respectively installed. A pair of automatic braking structures are arranged symmetrically left and right. The bicycle trailer further includes a trailer frame. The trailer frame is in a "C" - shaped structure and is arranged on the front side of the trailer cross shaft. The opening side faces the trailer cross shaft, and the two rod ends of the opening side are fixedly connected to the guide rods of a pair of automatic braking structures.

[0019] The present invention also proposes a bicycle equipped with the above - mentioned bicycle trailer. A connecting block fixedly connected to the frame extends backward from the tail of the bicycle body and is connected to the middle part of the front end of the trailer frame of the bicycle trailer through the connecting block.

[0020] Compared with the prior art, the beneficial effects of the present invention are reflected in:

[0021] The present invention aims to solve the problem that existing bicycle trailers have no brake device or need to add an additional brake system. The proposed automatic brake structure and the corresponding bicycle trailer and bicycle do not need to be additionally configured with a brake system or provide braking power. The inertia generated by the bicycle trailer when the bicycle body brakes is utilized to achieve automatic braking of the bicycle trailer. On the one hand, the complexity of the overall structure is reduced, and on the other hand, the bicycle trailer is made more convenient and safer to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure when the automatic brake structure of the present invention is assembled on the horizontal axis of the trailer;

[0023] Figure 2 is based on Figure 1 AA section structural diagram;

[0024] Figure 3 yes Figure 2 A partial cross-sectional structural diagram of the automatic brake structure;

[0025] Figure 4 It is a schematic structural diagram of a bicycle trailer of the present invention;

[0026] Figure 5 It is a schematic structural diagram of a bicycle of the present invention.

[0027] In the figure,

[0028] 1 automatic brake structure; 11 brake pad; 12 clutch plate; 13 clutch plate spring; 14 sliding block; 15 guide rod; 16 guide rod spring; 17 wedge block; 18 slide groove; 19 center hole;

[0029] 2 bicycle trailer; 21 trailer wheel; 22 trailer transverse axis; 23 trailer frame;

[0030] 3 bicycle body; 31 bicycle frame; 32 connecting block. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Please refer to Figures 1 to 3The automatic brake structure of this embodiment is used for braking a bicycle trailer 2. The axles of a pair of trailer wheels 21 of the bicycle trailer 2 are coaxially connected through a trailer transverse axis 22. The trailer transverse axis 22 can drive the pair of trailer wheels 21 to roll forward under the traction of an external force. The automatic brake structure 1 is assembled on the trailer transverse axis 22 and is arranged on the inner side of the trailer wheel 21, and includes a brake pad 11, a clutch pad 12, a clutch pad spring 13, a sliding block 14, a guide rod 15, a guide rod spring 16, and a wedge block 17.

[0033] The wedge block 17 and the sliding block 14 are arranged along the radial direction of the trailer transverse axis 22, and are respectively arranged at the front and rear sides of the trailer transverse axis 22. The rear end of the wedge block 17 is fixedly connected to the front end of the sliding block 14, and the integral structure is formed with a radially arranged slide groove 18, and is slidably sleeved on the trailer transverse axis 22 along the radial direction of the trailer transverse axis 22 and front and rear through the slide groove 18. The wedge block 17 is wide at the front and narrow at the rear, and the side facing the trailer wheel 21 is an inclined surface;

[0034] The guide rod 15 is fixed on the trailer transverse axis 22, and can be movably inserted into the wedge block 17, extending forward along the radial direction of the trailer transverse axis 22, and exposed outside the wedge block 17. A guide rod spring 16 is mounted on the rod section in the slide groove 18. The guide rod spring 16 is in a compressed state in the initial state and is tensioned between the wedge block 17 and the trailer transverse axis 22.

[0035] The brake pad 11 is fixedly mounted on the inner side of the trailer wheel 21, and forms a synchronously rotating member with the trailer wheel 21;

[0036] Between the wedge block 17 and the brake pad 11, the clutch plate 12 is slidably mounted on the trailer transverse shaft 22 along the axial direction through a sliding sleeve, and is tensioned between the clutch plate 12 and the brake pad 11 through a clutch plate spring 13 mounted on the trailer transverse shaft 22. In the initial state, the clutch plate spring 13 is in a compressed state, and the clutch plate 12 is separated from the brake pad 11;

[0037] The wedge block 17 of the automatic brake structure 1 can slide radially along the trailer's transverse axis 22, or slide backward until the inclined surface presses the clutch plate 12 against the brake pad 11 to form a braking state for the trailer wheel 21, or slide forward until the inclined surface separates from the clutch plate 12 to release the braking state.

[0038] In a specific implementation, the structural setting of the automatic braking structure 1 also includes:

[0039] The brake pad 11 is made of cast iron and is fixed to the inner side of the trailer wheel 21 by bolts. When the trailer wheel 21 rolls, the brake pad 11 rotates together with the trailer wheel 21.

[0040] The sliding sleeve is a copper sleeve. The clutch disc 12 can only slide left and right along the axial direction of the trailer transverse shaft 22 through the sliding sleeve. It is a component independent of the brake pad 11 and does not rotate with the trailer wheel 21 when the trailer wheel 21 rolls.

[0041] The end face of the clutch disc 12 facing the brake pad 11 is provided with a groove concave inward along the axial direction of the trailer transverse shaft 22, and the clutch disc spring 13 is tensioned in the groove.

[0042] Both the sliding block 14 and the wedge block 17 are made of metal and are fixedly connected by bolts.

[0043] The wedge block 17 is provided with a central hole 19 for the guide rod 15 to pass through.

[0044] The guide rod 15 is made of metal and can move back and forth along the radial direction of the trailer transverse shaft 22 within the central hole 19.

[0045] Please refer to Figure 4 , in this embodiment, an automatic braking structure 1 is also proposed. The wheel axles of the two trailer wheels 21 of the bicycle trailer 2 are coaxially connected through the trailer transverse shaft 22. On the trailer transverse shaft 22, inside a pair of trailer wheels 21, one such automatic braking structure 1 is installed respectively. The pair of automatic braking structures 1 are arranged symmetrically left and right. The bicycle trailer 2 further includes a trailer frame 3123. The trailer frame 3123 is in a "C" - shaped structure, arranged on the front side of the trailer transverse shaft 22, with the opening side facing the trailer transverse shaft 22, and the two rod ends of the opening side are fixedly connected to the guide rods 15 of a pair of automatic braking structures 1 respectively.

[0046] When specifically setting, the two rod ends of the opening side of the trailer frame 3123 can be set according to the outer shape structure of the guide rod 15 and directly serve as the guide rod 15, and movably pass through the central hole 19 of the wedge block 17.

[0047] The trailer transverse shaft 22 is made of metal and plays a role in connecting a pair of trailer wheels 21 and supporting other structures.

[0048] The trailer frame 3123 is made of metal or other rigid materials, provides support for the overall structure, and is used to connect the bicycle body 3.

[0049] Please refer to Figure 5 , in this embodiment, a bicycle is also proposed. The bicycle is provided with the above - mentioned bicycle trailer 2. A connecting block 32 fixedly connected to the frame 31 extends backward from the tail of the bicycle body 3, and is connected to the middle part of the front end of the trailer frame 3123 of the bicycle trailer 2. The connection between the middle part of the front end of the trailer frame 3123 can be assembled in a detachable manner such as bolt fixation or clamping connection.

[0050] Working principle:

[0051] When the bicycle body 3 and the bicycle trailer 2 are running normally, the guide rod spring 16 pushes the wedge block 17 toward the bicycle body 3, so that the sliding block 14 slides to the front end, that is, it is in contact with the trailer transverse axis 22. At this time, the wedge block 17 does not contact the clutch plate 12. The clutch plate 12 is away from the brake plate 11 under the action of the clutch plate spring 13, and there is no braking effect. The automatic brake structure 1 does not work, that is, it does not brake the bicycle trailer 2;

[0052] When the bicycle body 3 brakes, the bicycle trailer 2 moves forward toward the bicycle body 3 due to inertia. At this time, the trailer transverse axis 22 moves forward, and the wedge block 17 also moves forward with the trailer transverse axis 22. The elastic force of the guide rod spring 16 is not enough to resist the inertia of the bicycle trailer 2, and is compressed to leave a gap on the guide rod 15, so that the wedge block 17 has a movable space relative to the trailer transverse axis 22, causing the wedge block 17 to move backward. The backward-moving wedge block 17 pushes the clutch plate 12 with an inclined surface to make it close to the brake pad 11, and the elastic force of the clutch plate spring 13 is not enough to resist the force of the clutch plate 12 approaching. Finally, the clutch plate 12 and the brake pad 11 are in contact with each other, and the trailer wheel 21 is braked and decelerated, thereby achieving the purpose of automatic braking.

[0053] When the bicycle body 3 stops braking and the brake is released, the bicycle trailer 2 has no inertia to move forward relative to the bicycle body 3, and the guide rod spring 16 pushes the wedge block 17 toward the bicycle body 3 by its elastic force. At this time, the clutch plate 12 is no longer pushed by the wedge block 17 and is separated from the brake by the elastic force of the clutch plate spring 13. The braking effect disappears and the bicycle trailer 2 resumes normal travel.

[0054] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An automatic braking structure, characterized in that: It is used for braking a bicycle trailer. A pair of trailer wheels of the bicycle trailer are coaxially connected by a trailer cross shaft. The trailer cross shaft can drive a pair of trailer wheels to roll forward under the traction of an external force; the automatic braking structure is assembled on the trailer cross shaft and is arranged inside the trailer wheels, and includes a brake pad, a clutch disc, a clutch disc spring, a sliding block, a guide rod, a guide rod spring, and a wedge block; The wedge block and the sliding block are arranged along the radial direction of the trailer cross shaft, and are respectively arranged on the front and rear sides of the trailer cross shaft. The rear end of the wedge block is fixedly connected to the front end of the sliding block. The formed overall structure has a chute arranged along the radial direction, and is slidably sleeved on the trailer cross shaft along the radial direction and back and forth of the trailer cross shaft through the chute. The wedge block is wider at the front and narrower at the rear, and the side facing the trailer wheel is an inclined surface; The guide rod is fixedly arranged on the trailer cross shaft, is movably inserted into the wedge block, extends forward along the radial direction of the trailer cross shaft, and protrudes out of the wedge block. A guide rod spring is sleeved on the rod section located in the chute. The guide rod spring is in a compressed state in the initial state and is tensioned between the wedge block and the trailer cross shaft; The brake pad is fixedly installed inside the trailer wheel and forms a synchronous rotating member with the trailer wheel; Between the wedge block and the brake pad, the clutch disc is axially slidably sleeved on the trailer cross shaft through a sliding sleeve, and is tensioned with the brake pad by a clutch disc spring sleeved on the trailer cross shaft. In the initial state, the clutch disc spring is in a compressed state, and the clutch disc is separated from the brake pad; The wedge block of the automatic braking structure can slide along the radial direction of the trailer cross shaft, or slide backward to press the clutch disc against the brake pad to fit with the brake pad to form a braking state for the trailer wheel, or slide forward to separate the inclined surface from the clutch disc to form the解除 of the braking state.

2. The automatic brake structure according to claim 1, characterized in that: The brake pad is made of cast iron and is fixedly installed inside the trailer wheel by bolts.

3. The automatic brake structure according to claim 1, characterized in that: The sliding sleeve is a copper sleeve.

4. The automatic brake structure according to claim 1, characterized in that: Both the sliding block and the wedge block are made of metal and are fixedly connected by bolts.

5. The automatic brake structure according to claim 1, characterized in that: A central hole for the guide rod to pass through is provided on the wedge block.

6. The automatic brake structure according to claim 1, characterized in that: The guide rod is made of metal.

7. A bicycle trailer, characterized by: The wheel axles of the two trailer wheels of the bicycle trailer are coaxially connected by a trailer cross shaft. On the trailer cross shaft, inside a pair of trailer wheels, an automatic braking structure according to any one of claims 1-6 is respectively installed. A pair of automatic braking structures are arranged symmetrically left and right. The bicycle trailer further includes a trailer frame. The trailer frame is in a "C" - shaped structure, is arranged on the front side of the trailer cross shaft, the opening side faces the trailer cross shaft, and the two rod ends of the opening side are respectively fixedly connected to the guide rods of a pair of automatic braking structures.

8. A bicycle, characterized by: There is a bicycle trailer as claimed in claim 7. A connecting block fixedly connected to the frame extends rearward from the tail of the bicycle body and is connected to the middle of the front end of the trailer frame of the bicycle trailer through the connecting block.

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