CN113790235A

CN113790235A - Drum brake device for relieving elastic fatigue of reset tension spring

Info

Publication number: CN113790235A
Application number: CN202111182128.0A
Authority: CN
Inventors: 杜孟子; 章志华
Original assignee: Huangshan Feiying Auto Parts Co ltd
Current assignee: Huangshan Feiying Auto Parts Co ltd
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2021-12-14
Anticipated expiration: 2041-10-11
Also published as: CN113790235B

Abstract

The invention relates to the technical field of drum brake devices for relieving the elastic fatigue of a reset tension spring, and discloses a drum brake device for relieving the elastic fatigue of the reset tension spring, which comprises a brake bottom plate and brake shoes which are symmetrically distributed and are slidably connected to the side surface of the brake bottom plate, wherein the tension spring which is symmetrically distributed is additionally arranged between the two brake shoes, the side surface of the brake bottom plate adjacent to the brake shoes is provided with a magnetic attraction unit for driving the two brake shoes to keep opposite movement, the magnetic attraction unit is positioned between the two brake shoes, a driving unit for driving the magnetic attraction unit to keep intermittent magnetism is arranged in the magnetic attraction unit, a low-heat-conduction transmission unit for driving the driving unit to keep circumferential movement is arranged between the brake shoes and the driving unit, the shortage of the elasticity of the tension spring can be supplemented, the brake shoes are positioned at an initial position, the neutral gear of a brake pedal is removed, and the two brake shoes can be moved when the brake pedal is stepped each time, gives the driver a good driving experience.

Description

Drum brake device for relieving elastic fatigue of reset tension spring

Technical Field

The invention relates to the technical field of drum brake devices for relieving elastic fatigue of a reset tension spring, in particular to a drum brake device for relieving elastic fatigue of a reset tension spring.

Background

The drum brake is a brake device which utilizes a brake block which is static in a brake drum to rub the brake drum rotating along with a wheel so as to generate friction force to reduce the rotating speed of the wheel. When the brake pedal is stepped on, the two brake pads and the inner side of the brake drum are rubbed, and the rotating speed of the wheel is reduced, so that the purpose of braking is achieved.

According to patent number 202110097215.X, a drum brake mechanism is disclosed, comprising a housing, a brake shaft and a brake assembly, wherein the brake shaft and the brake assembly are mounted on the housing, the housing is further provided with a rocker arm, one end of the rocker arm is connected with the brake shaft, the other end of the rocker arm is connected with a brake cable, the brake cable pulls the rocker arm to swing so as to enable the brake shaft to drive the brake assembly to act for braking, the housing is further provided with a rocker arm reset piece, the rocker arm reset piece comprises a spring and a limit piece, the spring provides reset force for the rocker arm after braking is finished, the limit piece limits the spring to stretch in the linear direction, the brake cable controls the swing of the rocker arm to brake, the rocker arm drives the brake shaft to rotate when rotating, and the brake device is controlled to synchronously move by the brake shaft to realize braking; during the braking process, the rocker arm swings, the center of the swinging circle of the rocker arm is located on the axis of the brake shaft, the spring is driven by the rocker arm to move and accumulate elastic force during the swinging process, after the braking is stopped, the elastic force of the spring is released to act on the rocker arm to reset the rocker arm, and in the process, the contraction and the extension of the spring limit the telescopic direction under the action of the limiting part, namely the spring stretches in the linear direction without bending, so that the spring is not easy to damage and has longer service life.

The existing technology has the disadvantages that after the tension spring is used for a long time, part of elasticity is lost, and after the tension spring is stretched, the tension spring cannot restore to the original position automatically, so that the two brake shoes cannot restore to the original position due to the loss of part of elasticity of the tension spring, and therefore the brake pedal is in neutral position, and in a neutral position area, the brake pedal moves to cause the two brake shoes to expand, and the danger during braking is increased.

Disclosure of Invention

The invention aims to provide a drum brake device for relieving elastic fatigue of a reset tension spring, which can supplement the insufficient elasticity of the tension spring, drive a brake shoe to move oppositely through a cast iron sheet until the brake shoe and the cast iron sheet are positioned at initial positions, remove a neutral gear of a brake pedal, greatly prolong the service time of the tension spring, reduce the maintenance cost, and meanwhile, for a driver who is used to a new vehicle, the drum brake device can be more quickly adapted to the brake of the old vehicle when the driver drives the old vehicle.

Technical scheme

In order to solve the technical problem, the embodiment of the invention adopts the following technical scheme: the utility model provides a alleviate drum device of stopping of extension spring elastic fatigue that resets, includes the backing plate, is symmetric distribution and sliding connection in the brake shoe of backing plate side, two add between the brake shoe and be equipped with the extension spring that is symmetric distribution, the backing plate is adjacent the side of brake shoe is provided with the magnetism unit of inhaling that is used for ordering about two brake shoes and keeps the motion in opposite directions, magnetism is inhaled the unit and is located two between the brake shoe, it is used for ordering about to inhale to be provided with in the unit to inhale the magnetism unit and keeps intermittent type nature magnetic drive unit to inhale the unit, the brake shoe with be provided with between the drive unit and order about drive unit keeps the low heat conduction drive unit of circular motion, can supply the not enough of extension spring elasticity to drive the brake shoe through the cast iron piece and keep moving in opposite directions to brake shoe and cast iron piece and be located the initial position, get rid of brake pedal's neutral gear, prolonged the live time of extension spring simultaneously greatly, the maintenance cost is reduced, and meanwhile, for a driver who is used to a new vehicle, the brake of the old vehicle can be rapidly adapted to the driver when the driver drives the old vehicle.

As preferred, the unit is inhaled to magnetism includes semicircle ring magnetic path, electrician's soft iron and copper billet, the quantity of semicircle ring magnetic path has two, and fixed mounting in the braking bottom plate is adjacent the side of brake shoe, and the two adjacent side is interior concave surface, two add between the semicircle ring magnetic path and be equipped with the copper billet, the copper billet with the axis department of brake shoe is corresponding, the braking bottom plate is adjacent the side fixed mounting of brake shoe has the electrician's soft iron that is symmetric distribution and contactless, two semicircle ring magnetic paths are located two in the ring that electrician's soft iron formed, and two the copper billet is located two between the electrician's soft iron.

Preferably, the inner side surfaces of the two semicircular magnetic blocks and the two copper blocks form a smooth circle.

Preferably, the driving unit comprises a magnetic strip and an arc-shaped magnetic sheet, the magnetic strip is rotatably connected to the side face of the brake shoe adjacent to the brake bottom plate, the arc-shaped magnetic sheet is fixedly mounted at the two ends of the magnetic strip, and the arc-shaped magnetic sheet is attached to the inner wall of the semicircular magnetic block.

Preferably, the low heat conduction transmission unit comprises low heat conduction pull rods, the side surfaces of the two brake shoes are rotatably connected with the low heat conduction pull rods, and the other ends of the two low heat conduction pull rods are respectively rotatably connected to the two ends of the magnetic strip.

Preferably, cast iron sheets are fixedly mounted on the adjacent side surfaces of the two brake shoes.

Compared with the prior art, the drum brake device for relieving the elastic fatigue of the reset tension spring provided by the embodiment of the invention has the following beneficial effects:

in the invention, in the process of braking, two brake shoes keep relative motion through a brake wheel cylinder, tension springs are stretched and have elastic potential energy, magnetic strips keep circular motion at the central shaft through a low-heat-conduction pull rod, when the brake shoes continuously move, the magnetic strips rotate and drive arc-shaped magnetic strips to slide on the concave surfaces of the semicircular ring magnetic blocks, when the arc-shaped magnetic strips slide on the inner side surfaces of the copper blocks and contact the concave surface of the other semicircular ring magnetic block, one arc-shaped magnetic strip simultaneously contacts the two semicircular ring magnetic blocks, a magnetic attraction unit does not have magnetism outwards, the two brake shoes continue to move towards the brake drum, the purpose of braking is achieved through the friction force between the two brake shoes and the inner wall of the brake drum, when the braking is finished, the two brake shoes keep opposite motion under the tension force of the two tension springs, the magnetic strips keep opposite circular motion under the drive of the low-heat-conduction pull rod, and drive the arc-shaped magnetic strips to slide on the inner side surfaces of the two semicircular ring magnetic blocks and the two copper blocks to form a circle, the outer side surface of the copper block is separated from the inner side surface of one of the semicircular magnetic blocks and slides across the inner side surface of the copper block, the arc-shaped magnetic sheets fixedly installed at two ends of the magnetic strip are respectively contacted with one of the semicircular magnetic blocks, at the moment, under the action of the driving unit, the magnetic attraction unit has magnetism in the direction of the two copper blocks and respectively generates suction force on the two cast iron sheets, the deficiency of the elasticity of the tension spring is supplemented, the cast iron sheets drive the brake shoes to keep moving oppositely until the brake shoes and the cast iron sheets are located at the initial positions, at the moment, the magnetic strip is perpendicular to the tension spring, the neutral gear of the brake pedal is removed, so that the two brake shoes can be moved when the brake pedal is stepped each time, the good driving experience feeling is brought to a driver, the service time of the tension spring is greatly prolonged, the tension spring is prevented from being replaced after a large-sized vehicle is used for a period of time, the maintenance cost is reduced, and meanwhile, for the driver who is accustomed to a new vehicle, the brake can be quickly adapted to the old vehicle when the old vehicle is driven.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

This document provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of a partial cross-sectional structure of the present invention;

FIG. 3 is a schematic top view of the present invention;

FIG. 4 is a schematic structural view of a magnetic unit and a driving unit according to the present invention;

FIG. 5 is a schematic view of a magnetic unit according to the present invention.

In the figure: 1. braking the bottom plate; 2. a brake shoe; 3. a magnetic unit; 4. a low thermal conductivity transmission unit; 5. a tension spring; 6. a drive unit; 7. casting iron sheets; 8. electrical soft iron; 31. a semicircular ring magnetic block; 32. a copper block; 41. a low thermal conductivity tie rod; 61. a magnetic strip; 62. an arc-shaped magnetic sheet.

Detailed Description

So that the objects, technical solutions and advantages of the embodiments of the present disclosure will be more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of the word "comprising" or "comprises", and the like, in this disclosure is intended to mean that the elements or items listed before that word, include the elements or items listed after that word, and their equivalents, without excluding other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

As shown in fig. 1 to 5, the present invention includes a brake base plate 1, brake shoes 2 which are symmetrically distributed and slidably connected to a side surface of the brake base plate 1, tension springs 5 which are symmetrically distributed are additionally installed between the two brake shoes 2, a magnetic attraction unit 3 for driving the two brake shoes 2 to move in opposite directions is installed on a side surface of the brake base plate 1 adjacent to the brake shoes 2, the magnetic attraction unit 3 is located between the two brake shoes 2, a driving unit 6 for driving the magnetic attraction unit 3 to maintain intermittent magnetism is installed in the magnetic attraction unit 3, a low thermal conductivity transmission unit 4 for driving the driving unit 6 to maintain circular motion is installed between the brake shoes 2 and the driving unit 6, during a braking stroke, the two brake shoes 2 maintain relative motion through a brake wheel cylinder, the tension springs 5 are elongated and have elastic potential energy, and the magnetic strip 61 is kept to move in a circular motion at a central axis thereof through a low thermal conductivity pull rod 41, when the brake shoes 2 continuously move, the magnetic strip 61 rotates and drives the arc-shaped magnetic sheet 62 to slide in the inner concave surface of the semi-circular magnetic blocks 31, when the arc-shaped magnetic sheet 62 slides over the inner side surface of the copper block 32 and contacts the inner concave surface of the other semi-circular magnetic block 31, at the moment, one arc-shaped magnetic sheet 62 simultaneously contacts the two semi-circular magnetic blocks 31, the magnetic attraction unit 3 does not have magnetism outwards, the two brake shoes 2 continue to move towards the brake drum and achieve the purpose of braking through the friction force with the inner wall of the brake drum, when the braking is finished, the two brake shoes 2 keep moving oppositely under the pulling force of the two tension springs 5, the magnetic strip 61 keeps reverse circular motion under the driving of the low heat conduction pull rod 41, the arc-shaped magnetic sheet 62 is driven to slide on the inner side surfaces of the two semi-circular magnetic blocks 31 and the two copper blocks 32 in a circular shape, the outer side surface of the copper block 32 leaves the inner side surface of one semi-circular magnetic block 31, and slide on the inner side surface of the copper block 32, and the arc magnetic sheets 62 fixedly installed at both ends of the magnetic strip 61 respectively contact one of the semicircular magnetic blocks 31, at this time, the electric soft iron 8 is magnetized, the magnetic attraction unit 3 has magnetism in the direction of the two copper blocks 32 and respectively generates attraction force to the two cast iron sheets 7 to supplement the lack of elasticity of the tension spring 5, the cast iron sheet 7 drives the brake shoe 2 to keep moving oppositely until the brake shoe 2 and the cast iron sheet 7 are positioned at the initial position, at the moment, the magnetic strip 61 is vertical to the tension spring 5, the neutral position of the brake pedal is removed, the two brake shoes 2 can be moved by stepping on the brake pedal each time, the driver has good driving experience, the service time of the tension spring 5 is greatly prolonged, the tension spring 5 is prevented from being replaced after a large vehicle is used for a period of time, the maintenance cost is reduced, meanwhile, for a driver who is used to a new vehicle, the brake device can be quickly adapted to the brake of the old vehicle when the driver drives the old vehicle.

As shown in fig. 1 to 5, before braking, the positions of the brake shoe 2 and the cast iron plate 7 are initial positions, and at this time, the two tension springs 5 do not have elastic potential energy, wherein, two semicircular ring magnetic blocks 31 are provided, and are fixedly installed on the side surface of the brake shoe 2 adjacent to the brake base plate 1, and the adjacent side surfaces of the two semicircular ring magnetic blocks are concave surfaces, a copper block 32 is additionally installed between the two semicircular ring magnetic blocks 31, the copper block 32 corresponds to the middle shaft of the brake shoe 2, and the inner side surfaces of the two semicircular ring magnetic blocks 31 and the two copper blocks 32 form a smooth circle, the magnetic strip 61 is rotatably connected to the side surface of the brake shoe 2 adjacent to the brake base plate 1, when the positions of the brake shoe 2 and the cast iron plate 7 are initial positions, the magnetic strip 61 is in a perpendicular relationship with the tension springs 5, and the arc magnetic sheets 62 fixedly installed at the two ends of the magnetic strip 61 respectively contact one semicircular ring 31 and are located at the centers of the concave surfaces of the semicircular ring magnetic blocks 31, .

Wherein, in the braking stroke, the two brake shoes 2 keep relative motion through the brake wheel cylinder, the tension spring 5 is stretched and has elastic potential energy, the magnetic strip 61 keeps circular motion at the middle shaft through the low heat conduction pull rod 41, when the brake shoes 2 continuously move, the magnetic strip 61 rotates and drives the arc magnetic strip 62 to slide in the concave surface of the semi-circular magnetic block 31, when the arc magnetic strip 62 slides over the inner side surface of the copper block 32 and contacts the concave surface of the other semi-circular magnetic block 31, at this time, one arc magnetic strip 62 simultaneously contacts the two semi-circular magnetic blocks 31, the magnetic attraction unit 3 is not provided with magnetism outwards, the two brake shoes 2 continue to move towards the brake drum, and achieve the braking purpose through the friction force with the inner wall of the brake drum, when the braking is finished, the two brake shoes 2 keep relative motion under the tension of the two tension springs 5, under the drive of the low heat conduction pull rod 41, make magnetic stripe 61 keep reverse circular motion, and drive arc type magnetic sheet 62 two semicircle ring magnetic path 31 and two the medial surface of copper billet 32 forms circular upward slip, and the medial surface of copper billet 32 leaves the medial surface of one of them semicircle ring magnetic path 31 to slide the medial surface of copper billet 32, and the arc type magnetic sheet 62 of the both ends fixed mounting of magnetic stripe 61 contacts one of them semicircle ring magnetic path 31 respectively, and electrician's soft iron 8 is magnetized this moment, and magnetism unit 3 possesses magnetism in the direction of two copper billets 32, and produces suction to two cast iron pieces 7 respectively.

In addition, after the tension spring 5 is used for a long time, partial elasticity is lost, the tension spring cannot restore to the original position by itself after being stretched, so that the two brake shoes 2 and the cast iron sheets 7 cannot restore to the original position due to the loss of partial elasticity of the tension spring 5, and therefore the brake pedal has a neutral position, in the neutral position area, the brake pedal moves and cannot expand the two brake shoes 2, however, when the two arc-shaped magnetic sheets 62 respectively contact one of the semicircular ring magnetic blocks 31, the magnetic attraction unit 3 has magnetism in the direction of the two copper blocks 32, generates attraction force on the two cast iron sheets 7, supplements the deficiency of elasticity of the tension spring 5, drives the brake shoes 2 to keep moving oppositely through the cast iron sheets 7 until the brake shoes 2 and the cast iron sheets 7 are located at the original position, at the moment, the magnetic strips 61 are perpendicular to the tension spring 5, removes the neutral position of the brake pedal, and enables the two brake shoes 2 to move when the brake pedal is stepped on each time, give the driver good experience of traveling and feel, prolonged the live time of extension spring 5 greatly, avoid oversize vehicle to change extension spring 5 after using a period, reduced cost of maintenance, to the driver who is used to new car simultaneously, the brake of adaptation used car that can be comparatively rapid when it drives the used car.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.

Claims

1. The utility model provides an alleviate tired drum of extension spring elasticity that resets and stop device, include bottom plate (1) and be symmetric distribution and sliding connection in brake shoe (2) of bottom plate (1) side, two install extension spring (5) that are symmetric distribution between brake shoe (2) additional, its characterized in that: brake bottom plate (1) is adjacent the side of brake shoe (2) is provided with and is used for driving about two brake shoes (2) and keeps attracting unit (3) of moving in opposite directions, it is located two to inhale unit (3) magnetism between brake shoe (2), it is used for driving about to be provided with in unit (3) to inhale magnetism unit (3) and keeps intermittent type nature magnetic drive unit (6), brake shoe (2) with be provided with between drive unit (6) and drive about drive unit (6) keep circular motion's low heat conduction drive unit (4).

2. The drum brake device for relieving the elastic fatigue of the reset tension spring as claimed in claim 1, which is characterized in that: magnetic unit (3) is inhaled including semicircle ring magnetic path (31), electrician soft iron (8) and copper billet (32), the quantity of semicircle ring magnetic path (31) has two, and fixed mounting in brake bottom plate (1) is adjacent the side of brake shoe (2), and the two adjacent side is interior concave surface, two install copper billet (32) additional between semicircle ring magnetic path (31), copper billet (32) with the axis department of brake shoe (2) is corresponding, brake bottom plate (1) is adjacent the side fixed mounting of brake shoe (2) has electrician soft iron (8) that are the symmetric distribution and contactless, two semicircle ring magnetic path (31) are located two in the ring that electrician soft iron (8) formed, and two copper billet (32) are located two between electrician soft iron (8).

3. The drum brake device for relieving the elastic fatigue of the reset tension spring as claimed in claim 2, wherein: the inner side surfaces of the two semicircular magnetic blocks (31) and the two copper blocks (32) form a smooth circle.

4. The drum brake device for relieving the elastic fatigue of the reset tension spring as claimed in claim 2, wherein: drive unit (6) include magnetic stripe (61) and arc type magnetic sheet (62), magnetic stripe (61) rotate connect in braking bottom plate (1) is adjacent the side of brake shoe (2), the both ends fixed mounting of magnetic stripe (61) has arc type magnetic sheet (62), arc type magnetic sheet (62) with the inner wall of semicircle ring magnetic piece (31) is laminated mutually.

5. The drum brake device for relieving the elastic fatigue of the reset tension spring as claimed in claim 4, wherein: the low heat conduction transmission unit (4) comprises low heat conduction pull rods (41), the side faces of the two brake shoes (2) are connected with the low heat conduction pull rods (41) in a rotating mode, and the other ends of the two low heat conduction pull rods (41) are respectively connected to the two ends of the magnetic strips (61) in a rotating mode.

6. The drum brake device for relieving the elastic fatigue of the reset tension spring as claimed in claim 1, which is characterized in that: and cast iron sheets (7) are fixedly arranged on the adjacent side surfaces of the two brake shoes (2).