CN210822414U

CN210822414U - Brake system of handcart

Info

Publication number: CN210822414U
Application number: CN201920897247.6U
Authority: CN
Inventors: 赵国松
Original assignee: Shaoxing Shangyu Rixing Hardware Products Co Ltd
Current assignee: Shaoxing Shangyu Rixing Hardware Products Co Ltd
Priority date: 2019-06-14
Filing date: 2019-06-14
Publication date: 2020-06-23
Anticipated expiration: 2029-06-14

Abstract

The utility model provides a braking system of handcart, including the foot pole, install the wheel seat in foot pole bottom, install the gyro wheel on the wheel seat, be equipped with brake mechanism between wheel seat and the gyro wheel, rotate on the wheel seat and install the fender, the fender with at least a part in the brake mechanism links mutually, just the fender has the drive the primary importance of brake mechanism action and the second place that releases brake mechanism. The technical scheme disclosed in this application can realize stable brake effect, and the brake mechanism action is triggered by the fender, simple structure, and part utilization is high, low in production cost, facilitate promotion.

Description

Brake system of handcart

Technical Field

The utility model relates to a handcart field especially relates to braking system of handcart.

Background

The frame of current handcart is mostly collapsible structure, sees existing articulated complicated link mechanism from structural, also has the link type of relative succinct.

The related technical document discloses a quickly folded baby carriage frame, which comprises a front leg group, a rear leg group, a handle group and two folding structures, wherein each folding structure comprises a lower joint, an upper joint and a joint supporting seat: in each folded configuration, the lower joint is connected to the front leg set: the upper joint is connected with the sub-handle group: the joint supporting seat is connected with the rear foot assembly: lower joint and joint supporting seat rotatable coupling go up joint and joint supporting seat rotatable coupling: the lower joint and the upper joint can be mutually and oppositely connected to rotate, one end of the linkage connecting rod is rotatably connected with the upper joint, and the other end of the linkage connecting rod is rotatably connected with the lower joint: and the control mechanism can limit the rotation of the lower joint and the upper joint relative to the joint supporting seat.

The main characteristic of the structure similar to the prior art is that the brake mechanism of the frame is controlled by a single component, so that the structure is repeated, and the weight and the complexity of the handcart are increased.

SUMMERY OF THE UTILITY MODEL

The application discloses braking system of handcart, including the foot bar, install the wheel seat in foot bar bottom, install the gyro wheel on the wheel seat, be equipped with brake mechanism between wheel seat and the gyro wheel, rotate on the wheel seat and install the fender, the fender with at least part in the brake mechanism links mutually, just the fender has the drive the primary importance of brake mechanism action and the second place that releases brake mechanism.

Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.

Preferably, the brake mechanism includes:

the brake disc and the roller keep synchronous rotation and are provided with a plurality of brake grooves in the circumferential direction;

and the brake pin is slidably arranged on the wheel seat and is linked with the mudguard, the mudguard is positioned under the first position, and the brake pin is inserted into the brake groove.

Preferably, the wheel seat includes:

a rotary seat arranged at the end part of the foot rod;

the swing arm is rotatably arranged on the rotating seat, and the roller and the mudguard are arranged on the swing arm;

a damper spring supported between the swing arm and the swivel.

Preferably, the brake mechanism includes:

and the brake pin is slidably arranged on the swing arm and is linked with the mudguard, the mudguard is positioned under the first position, and the brake pin is inserted into the brake groove.

Preferably, the brake mechanism further includes:

and the two ends of the resetting piece are respectively abutted against the swing arm and the brake pin and used for driving the brake pin to retreat from the brake groove.

Preferably, the swing arm is provided with a fixed seat, and two ends of the reset piece are respectively pressed on the brake pin and the fixed seat.

Preferably, the mudguard is installed between the swivel base and the roller.

Preferably, the fender includes:

a rotating part mounted on the swing arm through a first pivot;

a mud blocking part which is connected with the rotating part and is formed in an extending way;

and the eccentric part is in butt linkage with the brake pin.

Preferably, the end surface of the brake pin facing the eccentric part is a hemispherical guide surface; the brake pin is inserted into the brake groove, and the eccentric part is abutted to the top point of the guide surface.

Preferably, the rotation axis of the roller, the swing axis of the swing arm and the swing axis of the fender are parallel, and the moving direction of the brake pin is perpendicular to the rotation axis of the roller.

The technical scheme disclosed in this application can realize stable brake effect, and the brake mechanism action is triggered by the fender, simple structure, and part utilization is high, low in production cost, facilitate promotion.

Specific advantageous technical effects will be explained in the detailed description.

Drawings

FIG. 1 is a schematic diagram of a braking system for a cart according to one embodiment;

FIG. 2 is a schematic view of the internal structure (roller omitted) of the braking system of FIG. 1;

FIG. 3 is an exploded view of the braking system of FIG. 1;

FIG. 4 is a schematic view of the internal structure of the brake pin of FIG. 1;

FIG. 5 is a schematic structural view of the brake disc of FIG. 1;

FIG. 6 is a schematic diagram illustrating the braking system of FIG. 1 after actuation;

fig. 7 is a schematic view of an application scenario of the braking system in fig. 1.

The reference numerals in the figures are illustrated as follows:

6. a foot bar; 61. a wheel seat; 611. a roller; 612. a rotating base; 613. swinging arms; 6131. a fixed seat; 6132. avoiding holes; 614. a damping spring; 6141. a spring seat; 62. a brake mechanism; 621. a brake disc; 6211. a brake groove; 6212. a connecting portion; 6213. a positioning bar; 6214. a partition wall; 622. a brake pin; 6221. chamfering; 6222. a pin body; 6223. compressing the sleeve; 6224. a brake spring; 6225. a guide surface; 6226. a vertex; 623. a reset member; 63. a fender; 631. a rotating part; 632. a mud blocking part; 633. an eccentric portion.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 7, the present application discloses a brake system for a stroller, which includes a foot bar 6, a wheel seat 61 mounted at the bottom of the foot bar 6, a roller 611 mounted on the wheel seat 61, a brake mechanism 62 disposed between the wheel seat 61 and the roller 611, a fender 63 rotatably mounted on the wheel seat 61, the fender 63 being operatively connected to at least one of the brake mechanisms 62, and the fender 63 having a first position for driving the brake mechanism 62 and a second position for releasing the brake mechanism 62.

The technical scheme that this application discloses drives brake mechanism 62 through mobilizable fender 63 in class, has improved the reuse of part, has simplified the convenient production of structure and has used.

In a specific implementation, the fender 63 has a variety of configurations and mounting arrangements. The fender 63 is not limited to a plate, and may have various structures such as a rod and a block, or may have a flexible sheet. Since the mud guard 63 is used to drive the brake mechanism 62, it is sufficient if a biasing force can be applied to the brake mechanism 62. The fender 63 itself may be replaced by other parts of the frame, such as a rod having a portion extending to the vicinity of the roller 611.

The specific form of the mudguard 63 actually needs to be specifically designed according to the structure of the brake mechanism 62. The reason is that when the brake mechanism 62 is different,

requiring different types of forces, in one embodiment, the braking mechanism 62 includes:

a brake disc 621 which rotates synchronously with the roller 611 and is provided with a plurality of brake grooves 6211 in the circumferential direction;

and a brake pin 622 slidably mounted on the wheel holder 61 and interlocked with the fender 63, wherein the fender 63 is located at the first position, and the brake pin 622 is inserted into the brake groove 6211.

Brake disc 621 rolls in synchronism with roller 611 so that brake pin 622 prevents brake disc 621 from rolling relative to the frame and roller 611 from rolling relative to the frame. In a particular implementation, brake disc 621 comprises a connection portion 6212 connected to roller 611 at the rolling axis of roller 611, this connection portion 6212 protruding at least partially into roller 611 and being provided axially with a protruding or recessed positioning bar 6213, so as to ensure that brake disc 621 and roller 611 rotate synchronously. Brake discs 621 may be provided on both sides of roller 611, depending on the particular arrangement of brake mechanism 62. The brake disc 621 is provided with a brake groove 6211, and when the brake pin 622 is inserted into the brake groove 6211, the rolling movement trend of the brake disc 621 is transmitted to the wheel seat 61 through the brake pin 622 and is restrained through the wheel seat 61. Thereby realizing the braking effect. The number of brake slots 6211 should be arranged as many as possible to avoid the situation where the brake pins 622 are not aligned with the brake slots 6211. However, the increase in the number of the brake slots 6211 causes the partition walls 6214 between the adjacent brake slots 6211 to be thinned, so that the strength of the brake mechanism 62 is reduced, and therefore, the end of the brake pin 622 facing the brake disc 621 is preferably chamfered 6221 with an arc-shaped face, and in the case that the brake pin 622 is not aligned with the brake slot 6211, the brake pin 622 is guided into the brake slot 6211, thereby achieving the braking effect.

The brake pin 622 structurally comprises a pin body 6222, a compression sleeve 6223 sleeved on the pin body 6222, and a brake spring 6224 pressed between the pin body 6222 and the compression sleeve 6223. The compression sleeve 6223 and the splash guard 63 actually function such that the pin body 6222 can slide freely within the compression sleeve 6223 and the pressure applied by the splash guard 63 against the compression sleeve 6223 is released to the pin body 6222 by the brake spring 6224. The design is preferred in that the mud flap 63 can also be brought into the first position when the brake pin 622 is not aligned with the brake groove 6211, the brake spring 6224 stores a portion of the energy, and when the roller 611 continues to roll, the brake groove 6211 on the brake disc 621 is aligned with the brake pin 622, and the brake spring 6224 will drive the pin body 6222 into the brake groove 6211 to complete the braking.

The braking force is finally transmitted to the wheel seat 61, and the structure of the wheel seat 61 determines the braking effect. In one embodiment, the wheel base 61 includes:

a rotary base 612 mounted on the end of the leg 6;

a swing arm 613 rotatably mounted on the rotary base 612, the roller 611 and the mudguard 63 being mounted on the swing arm 613;

a shock absorbing spring 614 supported between the swing arm 613 and the swivel base 612.

The design of roating seat 612 is used for realizing the effect of universal wheel, makes things convenient for the handcart adjustment direction. This solution is generally used for wheel seats 61 where the braking mechanism 62 is located in the front wheel; in some embodiments, the braking mechanism 62 is located on the rear wheel, and the wheel seat 61 of the rear wheel may optionally not be in the form of the rotating seat 612, so as to reduce the cost. The design of the swing arm 613 and the damping spring 614 can effectively reduce the impact on the bumpy road surface of the trolley and the pushing stability of the trolley. The swing arm 613 is further provided with a spring seat 6141 for supporting the damping spring 614, so that the mounting effect of the damping spring 614 is improved. In this embodiment, the relative position between the roller 611 and the wheel seat 61 is changed, so the brake mechanism 62 needs to be adjusted according to the situation. In one embodiment, the braking mechanism 62 includes:

and a brake pin 622 slidably mounted on the swing arm 613 and interlocked with the fender 63, wherein the fender 63 is located at the first position, and the brake pin 622 is inserted into the brake groove 6211.

The roller 611 is actually hinged to the swing arm 613, the relative position is determined, the brake pin 622 is slidably mounted on the swing arm 613, the stable braking effect can be always maintained, and the mudguard 63 can stably drive the brake pin 622 into the brake groove 6211. When the brake pin 622 is not in the brake groove 6211, the hand truck is in a state of being pushed for normal use, and the position of the brake pin 622 needs to be ensured to be stable, so that if the brake pin 622 accidentally enters the brake groove 6211, the hand truck may be in danger of being accidentally overturned. The brake pin 622 therefore requires a means to maintain position. In a specific design, the brake pin 622 may be selectively hinged to the fender 63, and the fender 63 may be frictionally held in place to secure the brake pin 622. However, this solution has high accuracy requirements for the fender 63 and the swing arm 613, and may cause positioning failure after long-term wear. Thus, in one embodiment, the braking mechanism 62 further comprises:

two ends of the reset member 623 abut against the brake pin 622 at the swing arm 613 respectively, and are used for driving the brake pin 622 to exit from the brake slot 6211.

The reset piece 623 ensures that the brake pin 622 cannot accidentally fall into the brake groove 6211, and the use safety is ensured. While the position of the reset member 623 also needs to be stably fixed to prevent interference with the movement of the roller 611. In an embodiment, the swing arm 613 is provided with a fixing seat 6131, and two ends of the reset member 623 respectively press against the brake pin 622 and the fixing seat 6131.

The fixing seat 6131 may be designed in various forms, such as a single plate, and the avoiding hole 6132 is formed to facilitate the matching of the brake pin 622 and the brake disc 621. In the scheme shown in the figure, the fixing seat 6131 is a closed shell, the upper part and the lower part of the fixing seat are provided with avoidance holes 6132, the avoidance holes 6132 at the upper end are used for avoiding the head of the brake pin 622 to act with the mudguard 63, and the avoidance holes 6132 at the lower part are used for avoiding the bottom of the brake pin 622 to be matched with the brake disc 621. The fixing seat 6131 is a housing, and has the advantage that the brake pin 622 is accommodated in a relatively closed space, so that impurities such as muddy water carried by the roller 611 are prevented from affecting the action of the brake pin 622. The fender 63 may be mounted in a variety of different locations, such as an extended portion of the swing arm 613 for mounting the fender 63, and in one embodiment, the fender 63 is mounted between the swivel base 612 and the roller 611. The advantage of this design is that the mud guard 63 is in opposite proximity to the roller 611, which is beneficial to both the transmission of the brake mechanism 62 and the mud guard effect. In the present embodiment, the mudguard 63 is a plate extending along the tangential direction of the roller 611, and in other embodiments, the mudguard 63 may have a circular arc shape or even a special shape. The mounting and shape of the mud guard 63 determines the effectiveness of the mud guard and the effectiveness of the transmission with the brake mechanism 62. In one embodiment, the fender 63 includes:

a rotating portion 631 mounted on the swing arm 613 by a first pivot;

a mud guard 632 connected to the rotation part 631 and extending therefrom;

and an eccentric portion 633 which is interlocked with the brake pin 622.

The eccentric portion 633 is used for forming an action point with the distance inconsistent with the rotating axis along with the rotation of the mudguard 63 so as to drive the brake pin 622 to displace and realize the action of the brake mechanism 62. The design has the advantages of good stability, no influence of external environment, low precision requirement, few parts and simple and stable structure.

In order to reduce the resistance to the action of the braking mechanism 62, in one embodiment, the braking pin 622 is a hemispherical guide surface 6225 facing the end surface of the eccentric portion 633; the brake pin 622 is inserted into the brake groove 6211, and the eccentric portion 633 abuts against the apex 6226 of the guide surface 6225. The guide surface 6225 can convert the rotation of the fender 63 into the linear movement of the brake pin 622, thereby reducing wear between the parts. When the brake pin 622 is in place, the vertex 6226 of the guide surface 6225 abuts against the eccentric portion 633, and at this time, the brake pin 622 and the fender 63 enter the dead point, and the fender 63 cannot be driven by the brake pin 622, so that the brake operation is stable, and the brake mechanism 62 cannot be released accidentally.

In one embodiment, the rotation axis of the roller 611, the swing axis of the swing arm 613 and the swing axis of the mudguard 63 are parallel, and the moving direction of the brake pin 622 is perpendicular to the rotation axis of the roller 611.

In practical options, the rotation axis of the roller 611, the swing axis of the swing arm 613 and the swing axis of the fender 63 are located on the swing arm 613, and in the figure, two swing arms 613 are arranged in parallel, so that the rotation axis of the roller 611, the swing axis of the swing arm 613 and the swing axis of the fender 63 can be ensured to be parallel, and a stable movement track of the roller 611 is provided. The moving direction of the brake pin 622, i.e. the axial direction thereof, is perpendicular to the rotational axis of the roller 611, so that the maximum braking moment can be realized, and the braking effect can be ensured.

The braking process will be explained below with reference to specific components:

when a user needs to brake, the mudguard 63 is rotated by exerting force on the mudguard portion 632 upwards in the figure, the mudguard 63 rotates along the rotating axis, the distance between the farthest end of the eccentric portion 633 and the rotating axis is increased, the brake pin 622 is driven to move downwards, the avoiding hole 6132 at the lower end of the fixing seat 6131 is extended into the brake groove 6211, and at the moment, the roller 611 cannot roll.

When a user needs to push the handcart, the user only needs to exert force on the mud blocking portion 632 downwards in the figure to rotate the mud blocking portion 63, the mud blocking portion 63 rotates along the rotating axis, the distance between the farthest end of the eccentric portion 633 and the rotating axis is reduced, the farthest end of the eccentric portion 633 is far away from the brake pin 622, the upward stroke of the brake pin 622 is released, under the action of the reset piece 623, the brake pin 622 moves upward and exits the brake groove 6211, and the brake mechanism 62 releases the brake effect.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The brake system of handcart, including the foot bar, install the wheel seat in the foot bar bottom, install the gyro wheel on the wheel seat, be equipped with brake mechanism between wheel seat and the gyro wheel, its characterized in that, rotate on the wheel seat and install the fender, the fender with at least a part in the brake mechanism links mutually, just the fender has the drive the primary importance of brake mechanism action and the second place that releases brake mechanism.

2. A brake system for a trolley according to claim 1, wherein the brake mechanism includes:

3. A brake system for a trolley according to claim 2, wherein the wheel seat comprises:

a rotary seat arranged at the end part of the foot rod;

a damper spring supported between the swing arm and the swivel.

4. A brake system for a trolley according to claim 3, wherein the brake mechanism includes:

5. A brake system for a trolley according to claim 4, wherein the brake mechanism further comprises:

6. A brake system for a trolley according to claim 5 wherein the swing arm is provided with a mounting bracket and the return member has ends which abut against the brake pin and the mounting bracket respectively.

7. A brake system for a stroller according to claim 3, wherein said fender is mounted between said swivel base and said roller.

8. A brake system for a stroller according to claim 3, wherein said fender comprises:

a rotating part mounted on the swing arm through a first pivot;

and the eccentric part is in butt linkage with the brake pin.

9. A brake system for a trolley according to claim 8, wherein the end surface of the brake pin facing the eccentric portion is a hemispherical guide surface; the brake pin is inserted into the brake groove, and the eccentric part is abutted to the top point of the guide surface.

10. A brake system for a stroller according to claim 8, wherein said roller is provided with a rotation axis, said swing arm is provided with a swing axis, and said fender is provided with a swing axis parallel to said rotation axis, and said brake pin is provided with a movement direction perpendicular to said rotation axis of said roller.