CN114198433A

CN114198433A - Ejecting type rotary braking device

Info

Publication number: CN114198433A
Application number: CN202010988020.XA
Authority: CN
Inventors: 林锦桐
Original assignee: Guangdong Power Grid Co Ltd; Jiangmen Power Supply Bureau of Guangdong Power Grid Co Ltd
Current assignee: Guangdong Power Grid Co Ltd; Jiangmen Power Supply Bureau of Guangdong Power Grid Co Ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2022-03-18
Anticipated expiration: 2040-09-18
Also published as: CN114198433B

Abstract

The invention relates to the technical field of brakes, in particular to a push-out type rotary brake device. The device comprises a wheel body and at least two brake shoes, wherein the brake shoes are distributed around the circumferential direction of the wheel body, the end parts of the brake shoes are provided with elastic linkage parts, the end parts of every two brake shoes are elastically connected, and the whole wheel body is of an annular structure; the wheel body is movably provided with a plurality of ejector blocks, and each ejector block is uniformly distributed around the circumference of the wheel body and can move back and forth to penetrate through the maximum outer diameter of the wheel body. The wheel body rotates, the ejector block moves away from the center of the circle of the wheel body under the action of centrifugal force to eject each brake shoe and push the brake shoes pairwise, so that the annular radius of each brake shoe is increased, and braking is performed. The invention automatically implements braking in high-speed rotation by utilizing the centrifugal force effect in rotation, thereby effectively achieving the effects of speed reduction and speed limitation.

Description

Ejecting type rotary braking device

Technical Field

The invention relates to the technical field of brakes, in particular to a push-out type rotary brake device.

Background

A brake is a device having a function of decelerating, stopping, or maintaining a stopped state of a moving member (or a moving machine), and is a machine component that stops or decelerates a moving member in a machine. In the field of automobiles or other safety devices, brakes are commonly used, and at present, the types of brakes on the market are various, and the types of brakes adopted in different use situations are not many.

Chinese patent publication No. CN107830082A discloses a simple balance brake in 23.03.2018, which is a brake for a vehicle, and uses the rotation of a cam to push a brake shoe for braking. However, this brake mainly performs active braking, and requires manual operation to perform braking.

Disclosure of Invention

The invention provides a push-out type rotary braking device for overcoming the defects in the prior art, which automatically implements braking in high-speed rotation by utilizing the centrifugal force during rotation, and effectively achieves the effects of speed reduction and speed limitation.

In order to solve the technical problems, the invention adopts the technical scheme that:

a push-out type rotary braking device comprises a wheel body and at least two brake shoes, wherein the brake shoes are distributed around the circumferential direction of the wheel body, the end parts of the brake shoes are provided with elastic linkage parts, the end parts of every two brake shoes are elastically connected, and the whole structure is annular; the wheel body is movably provided with a plurality of ejector blocks, and each ejector block is uniformly distributed around the circumference of the wheel body and can move back and forth to penetrate through the maximum outer diameter of the wheel body.

The wheel body rotates, the ejector block moves away from the center of the circle of the wheel body under the action of centrifugal force to eject each brake shoe and push the brake shoes pairwise, so that the annular outer diameter of each brake shoe is increased, and braking is performed. When the wheel body is used, the wheel body is connected with the external rotating shaft and synchronously rotates. When the wheel body rotates at a high speed, the ejector block on the wheel body moves away from the center of the wheel body under the action of centrifugal force, so that the brake shoes are ejected to be spread to brake. When the rotating speed is reduced, the centrifugal force action is reduced, the brake shoe is elastically reset, and the braking effect is weakened.

Furthermore, the elastic linkage part is divided into a first linkage part and a second linkage part, the first linkage part is provided with a positioning column, the second linkage part is provided with a limiting groove arranged along an arc line, the limiting groove is matched with the positioning column, and the positioning column slides back and forth in the limiting groove; an elastic piece is arranged in the limiting groove, the elastic piece is abutted against the positioning column along the sliding direction of the positioning column, and the elastic piece is always kept in a compressed state; the ends of the two matched brake shoes are respectively provided with a first linkage part and a second linkage part.

The first linkage part and the second linkage part are assembled to realize elastic linkage. It should be noted that the end of the brake shoe is provided with only the first or second linkage portion, and the elastic linkage portion at the end where the two brake shoes are engaged cannot be the same linkage portion or cannot be assembled. When the brake shoe is spread, the positioning column of the first linkage part extrudes the elastic part, overcomes the elasticity of the elastic part, and slides along the limiting groove of the second linkage part. On the contrary, under the elastic force of the elastic part, the positioning column returns, and the brake shoe is reset.

Furthermore, the brake device also comprises two side outer covers, wherein the outer covers cover the two axial sides of the wheel body and clamp the brake shoes; the outer cover is clamped and fixed with the wheel body. The outer cover covers the wheel body and the two side surfaces of the brake shoe, and radial movement of the ejector block and the brake shoe is not influenced.

Furthermore, the ejector blocks are symmetrically distributed, and the included angles between every two ejector blocks are equal. The jacking blocks are uniformly distributed and are ejected to the inner wall of the brake shoe under the action of centrifugal force to push the brake shoe open.

Furthermore, the wheel body is provided with a fixed shaft for limiting the movement of the ejector block, the ejector block is correspondingly provided with a groove position, and the fixed shaft is clamped in the groove position. The fixed shaft is parallel to the axial direction of the wheel body and is arranged close to the circumferential position of the wheel body.

Further, the wheel body is provided with an installation position for placing the ejector block, and the installation position is matched with the ejector block in shape. The opening of the mounting position faces the inner wall of the brake shoe.

Furthermore, the kicking block is the runner, the trench is located the runner center, and the trench radius is greater than the fixed axle external diameter. The rotating wheel is assembled on the wheel body through the groove position and the fixed shaft, and the inner diameter of the groove position is larger than the outer diameter of the fixed shaft, so that sufficient moving space of the rotating wheel is ensured.

Furthermore, shaft holes are reserved in the centers of the wheel body and the outer cover. The shaft hole is mainly used for synchronously connecting the wheel body, the outer cover and the external rotating shaft.

Furthermore, the circumferential outer wall of the brake shoe is provided with a friction plate. The friction plate is a commonly used part of the existing brake and is mainly used for enhancing the braking effect and the wear resistance of the brake shoe.

Further, the elastic member is a spring or a rubber block. The elastic member is a component having an elastic restoring ability, and is preferably a spring.

Compared with the prior art, the invention has the beneficial effects that: the invention discloses a push-out type rotary braking device which can be used as a self-starting type braking device.

Drawings

FIG. 1 is a schematic structural view of example 1.

FIG. 2 is an overall view of embodiment 1.

FIG. 3 is a schematic view of the state of use of example 1.

Fig. 4 is a schematic structural view of a braking state of embodiment 1.

FIG. 5 is an internal structural view of embodiment 1.

FIG. 6 is a schematic view of a first structure of the elastic linking part.

FIG. 7 is a second structural view of the elastic linking part.

Fig. 8 is an assembled state diagram of the elastic interlocking part.

Fig. 9 is a schematic assembly view of a brake shoe according to embodiment 2.

The brake shoe comprises a wheel body 1, a mounting position 11, a fixing shaft 12, a brake shoe 2, an outer cover 3, a friction plate 4, an elastic linkage part 5, a first linkage part 51, a second linkage part 52, a positioning column 53, a limiting groove 54, an elastic part 55, a top block 6 and a groove position 61.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

Example 1

As shown in fig. 1, the invention provides an ejection type rotary brake device, which comprises a wheel body 1, two brake shoes 2 and two side outer covers 3, wherein the two brake shoes 2 are semicircular, the two brake shoes 2 are arranged around the wheel body 1 in the circumferential direction to form an annular structure, the end parts of the two brake shoes 2 are provided with elastic linkage parts 5, and the two brake shoes 2 are elastically connected through the elastic linkage parts 5. Meanwhile, the circumferential outer wall of the brake shoe 2 is provided with a friction plate 4.

Specifically, the elastic linkage portion 5 is divided into a first linkage portion 51 and a second linkage portion 52, wherein the first linkage portion 51 is provided with a positioning column 53, the second linkage portion 52 is provided with a limiting groove 54 arranged along an arc, the limiting groove 54 is matched with the positioning column 53, and the positioning column 53 slides back and forth in the limiting groove 54. In addition, an elastic member 55 is provided in the stopper groove 54, the elastic member 55 abuts against the positioning post 53 in the sliding direction of the positioning post 53, and the elastic member 55 is always kept in a compressed state, and the elastic member 55 is a rubber block in this embodiment.

It should be noted that the end of the brake shoe 2 is provided with only the first linkage 51 or the second linkage 52, and the end of the two brake shoes 2 that are mated are provided with the first linkage 51 and the second linkage 52, respectively, as shown in fig. 8.

The specific matching shapes of the first and

second linkage portions

51 and 52 can take various forms, and therefore the present application is not particularly limited, and the common structures are shown in fig. 6 and 7.

In this embodiment, as shown in fig. 5, six ejector blocks 6 are movably disposed on the wheel body 1, each ejector block 6 is uniformly and symmetrically distributed around the circumference of the wheel body 1, and the included angles between every two ejector blocks 6 are equal. Specifically, the wheel body 1 is provided with a mounting position 11 for placing the top block 6, and the mounting position 11 is matched with the top block 6 in shape. Wherein, each mounting position 11 of the wheel body 1 is provided with a fixed shaft 12 for limiting the movement of the ejector block 6, and the fixed shaft 12 is parallel to the axial direction of the wheel body 1 and is arranged close to the circumferential position of the wheel body 1. In this embodiment the top block 6 is a wheel and the mounting location 11 is thus a semicircle with a central angle smaller than 180 degrees.

In the embodiment, under the condition of accelerated rotation, the jacking block 6 is gradually jacked out to promote the brake shoes 2 to be mutually propped open for braking, and then the brake shoes are automatically folded and reset under elasticity, so that the brake or deceleration can be automatically implemented under emergency, additional manual control is not needed, and the control effect is better.

In addition, as shown in fig. 4-5, a slot 61 is provided at the center of the wheel, and the wheel is assembled on the wheel body 1 through the slot 61 and the fixed shaft 12. Specifically, the inner diameter of the slot 61 is larger than the outer diameter of the fixed shaft 12, so that a sufficient moving space is ensured for the rotating wheel, and the rotating wheel moves back and forth in the moving space defined by the slot 61, so that the rotating wheel passes through the maximum outer diameter range of the wheel body 1 under the action of centrifugal force.

Specifically, as shown in fig. 2, the two-side covers 3 cover the two axial sides of the wheel body 1 and clamp the brake shoes 2, and the covers 3 cover both sides of the wheel body 1 and the brake shoes 2 in this embodiment. Simultaneously, enclosing cover 3 is fixed with wheel body 1 joint, and the axle hole all is left at the center of wheel body 1, enclosing cover 3, and the axle hole mainly used wheel body 1, enclosing cover 3 and outside pivot synchronous connection.

The specific process is as follows: when the rotational acceleration of the wheel 1 reaches a certain value, the centrifugal force generated also reaches the trigger point of the braking device. At this time, the ejector 6, i.e. the rotating wheel, on the wheel body 1 moves away from the center of the circle of the wheel body 1 under the action of centrifugal force, and the ejector 6 ejects each brake shoe 2 and causes every two brake shoes 2 to be spread, so that the annular outer diameter of each brake shoe 2 is increased, and deceleration and braking are performed. When the brake shoe 2 is spread, the positioning column 53 of the first linkage part 51 presses the elastic member 55, overcomes the elastic force of the elastic member 55, and slides along the limiting groove 54 of the second linkage part 52. When the rotation acceleration of the wheel body 1 is reduced, the centrifugal force of the ejector block 6 is reduced, the positioning column 53 slides along the limiting groove 54 to return under the elastic force of the elastic piece 55, and the brake shoe 2 is folded and reset.

Example 2

The embodiment also provides an ejection type rotary brake device, the braking principle and the structure are similar to those of the embodiment 1, the difference is that the number of the brake shoes 2 in the embodiment is more than two, the end parts of the brake shoes 2 are connected end to end through the elastic linkage parts 5 to form an annular structure, and as shown in fig. 9, when braking is carried out, the brake shoes 2 are pushed by the ejection blocks 6 and simultaneously are outwards spread to brake.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A lift-out rotary brake apparatus, characterized by: the brake shoe comprises a wheel body and at least two brake shoes, wherein the brake shoes are arranged around the circumference of the wheel body, the end parts of the brake shoes are provided with elastic linkage parts, the end parts of every two brake shoes are elastically connected, and the whole brake shoe is of an annular structure; the wheel body is movably provided with a plurality of ejector blocks, and each ejector block is uniformly distributed around the circumference of the wheel body and can move back and forth to penetrate through the maximum outer diameter of the wheel body;

the elastic linkage part is divided into a first linkage part and a second linkage part, the first linkage part is provided with a positioning column, the second linkage part is provided with a limiting groove arranged along an arc line, the limiting groove is matched with the positioning column, and the positioning column slides back and forth in the limiting groove; an elastic piece is arranged in the limiting groove, the elastic piece is abutted against the positioning column along the sliding direction of the positioning column, and the elastic piece is always kept in a compressed state; the end parts of the two matched brake shoes are respectively provided with a first linkage part and a second linkage part;

the wheel body rotates, the ejector block moves away from the center of the circle of the wheel body under the action of centrifugal force to eject each brake shoe and push the brake shoes pairwise, so that the annular outer diameter of each brake shoe is increased, and braking is performed.

2. The lift-out rotary brake of claim 1, wherein: the outer covers cover the two axial sides of the wheel body and clamp the brake shoes; the outer cover is clamped and fixed with the wheel body.

3. The lift-out rotary brake of any one of claims 1 to 2, wherein: the ejector blocks are symmetrically distributed, and included angles between every two ejector blocks are equal.

4. The lift-out rotary brake of claim 3, wherein: the wheel body is provided with a fixed shaft for limiting the movement of the ejecting block, the ejecting block is correspondingly provided with a groove position, and the fixed shaft is clamped in the groove position.

5. The lift-out rotary brake of claim 4, wherein: the wheel body is provided with an installation position for placing the ejector block, and the installation position is matched with the ejector block in shape.

6. The lift-out rotary brake of claim 5, wherein: the kicking block is the runner, the trench is located the runner center, and the trench radius is greater than the fixed axle external diameter.

7. The lift-out rotary brake of claim 6, wherein: the centers of the wheel body and the outer cover are provided with shaft holes.

8. The lift-out rotary brake of claim 1, wherein: and friction plates are arranged on the circumferential outer wall of the brake shoe.

9. The lift-out rotary brake of claim 1, wherein: the elastic piece is a rubber block.

10. The lift-out rotary brake of claim 1, wherein: the elastic piece is a spring.