CN113638993A

CN113638993A - Automatic adjusting device for brake pad of electric bicycle

Info

Publication number: CN113638993A
Application number: CN202110791659.3A
Authority: CN
Inventors: 陈涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-07-13
Filing date: 2021-07-13
Publication date: 2021-11-12

Abstract

The invention relates to the technical field of electric bicycles and discloses an automatic adjusting device for a brake pad of an electric bicycle, which comprises a brake drum, wherein a brake pump is fixedly connected to the inner wall of the middle part of the brake drum, a brake shoe is fixedly connected to the inner side of the brake pump, a telescopic cylinder is fixedly connected to the inner wall of the middle part of the brake drum, and an electromagnet is fixedly connected to the inner wall of the middle part of the brake drum. This be used for electric bicycle brake block automatic regulating apparatus, drive the brake shoe motion through the brake pump, the brake shoe drives the brake block motion, rethread centrifugal block and reset spring's cooperation is used, thereby reach the effect of braking with the monitoring of anticipatory braking effect, the brake pump expands to the outside, thereby drive the outside motion of brake shoe, make brake block and car hub inner wall contact, thereby produce frictional force and reach the purpose of speed reduction, the repulsion force that the centrifugal block received disappears, after the brake block contacted with the car hub, reach the effect of deceleration, the rotational speed of tachometer wheel reduces, the centrifugal force that the centrifugal block received reduces gradually until disappearing.

Description

Automatic adjusting device for brake pad of electric bicycle

Technical Field

The invention relates to the technical field of electric bicycles, in particular to an automatic adjusting device for a brake pad of an electric bicycle.

Background

Electric bicycles become main transportation tools for urban traffic in China, the possession quantity of the electric bicycles is improved year by year, the electric bicycles are favored by consumers due to the convenience of the electric vehicles, the safe operation of the electric bicycles is particularly important, brakes are the most important safety parts of the electric bicycles, the improvement of the braking performance of the electric bicycles is the root of ensuring the safe operation of the electric bicycles, and the braking performance of the electric bicycles has no doubt on the traffic safety.

The existing electric bicycle mostly adopts a drum brake, a brake shoe of the existing electric bicycle is in surface-to-surface contact with a brake drum from point to point, the braking efficiency is relatively low, the abrasion degree of a friction plate of the brake shoe is uneven due to unequal braking torque applied by the brake drum, different degrees of abrasion can be caused in the long-time use process, the expected braking effect can not be achieved when the brake is carried out, and thus traffic accidents can be caused by potential safety hazards. .

Therefore, we propose an automatic adjusting device for a brake pad of an electric bicycle to solve the above problems.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides the automatic adjusting device for the brake pad of the electric bicycle, which has the advantages of simple operation, automatic detection of the braking effect and failure in braking compensation prevention to achieve the expected braking effect, and solves the problem that the expected braking effect is easily affected by the braking abrasion of the traditional brake pad to cause accidents.

(II) technical scheme

In order to realize the purpose of automatically detecting the braking effect and preventing the braking compensation from failing to achieve the expected braking effect, the invention provides the following technical scheme: the utility model provides a be used for electric bicycle brake block automatic regulating apparatus, includes the brake drum, brake drum middle part inner wall fixedly connected with brake pump, the inboard fixedly connected with brake shoe of brake pump, the flexible section of thick bamboo of brake drum middle part inner wall fixedly connected with, brake drum middle part inner wall fixedly connected with electromagnet, the inboard fixedly connected with telescopic link of brake shoe, telescopic link outside fixedly connected with movable contact, the positive swing joint of telescopic link has electrically conductive post, brake shoe middle part inner wall swing joint has the magnetostrictive material, brake shoe middle part inner wall swing joint has the metal block.

Preferably, the outer side of the brake drum is movably connected with a hub, the size of the hub is matched with that of the brake drum, and when the hub rotates along the outer side of the brake drum, the speed is reduced under the action of the brake pad, so that the purpose of reducing the speed is achieved.

Preferably, telescopic cylinder middle part inner wall fixedly connected with stationary contact, telescopic cylinder middle part set up with the activity groove of telescopic link looks adaptation, telescopic cylinder middle part inner wall fixedly connected with resistance card, stationary contact mainly play the break-make electricity state of the electromagnet of control centrifugal block middle part inner wall, drive the telescopic link motion this moment when the brake hoof moves to the outside to the realization drives and leads electrical pillar and resistance card contact.

Preferably, the brake pad is fixedly connected to the outer side of the metal block, the size of the brake pad is smaller than that of the brake shoe, and the metal block moves outwards under the action of the magnetostrictive material, so that the brake pad is extruded outwards, and the brake pad is contacted with the hub to generate large friction.

Preferably, the inner wall of the middle part of the brake drum is movably connected with a speed measuring wheel, the outer side of the speed measuring wheel is attached to the inner side of the hub, the speed measuring wheel mainly detects the rotating speed of the hub, and if the expected speed reduction effect is not achieved, further reaction is carried out to enable the brake pad to be in contact with the hub.

Preferably, a centrifugal groove is formed in the middle of the speed measuring wheel, a centrifugal block is movably connected to the inner wall of the centrifugal groove, a ball is clamped to the outer side of the centrifugal block, a reset spring is fixedly connected to the inner side of the centrifugal block, a dielectric plate is fixedly connected to the inner wall of the middle of the centrifugal block, the ball mainly plays a role in reducing friction force to enable the equipment to be more sensitive, and the reset spring mainly plays a role in pulling and resetting the centrifugal block.

Preferably, inner wall fixedly connected with positive plate in the middle part of the tachometer wheel, inner wall fixedly connected with negative plate in the middle part of the tachometer wheel, inner wall fixedly connected with piezo-resistor in the middle part of the tachometer wheel, negative plate and positive plate are the same in size, and its main objective is to play the operating voltage of control piezo-resistor.

Preferably, the inner wall fixedly connected with piezo-resistor in the middle part of the tachometer wheel, piezo-resistor and negative plate electric connection change the relative area of negative plate and positive plate through the dielectric plate to realize changing the terminal voltage of negative plate, control piezo-resistor's the on-off state.

(III) advantageous effects

Compared with the prior art, the invention provides an automatic adjusting device for a brake pad of an electric bicycle, which has the following beneficial effects:

1. this be used for electric bicycle brake block automatic regulating apparatus, drive the brake shoe motion through the brake pump, the brake shoe drives the brake block motion, rethread centrifugal block and reset spring's cooperation is used, thereby reach the effect of braking with the monitoring of anticipatory braking effect, the brake pump expands to the outside, thereby drive the outside motion of brake shoe, make brake block and car hub inner wall contact, thereby produce frictional force and reach the purpose of speed reduction, the repulsion force that the centrifugal block received disappears, after the brake block contacted with the car hub, reach the effect of deceleration, the rotational speed of tachometer wheel reduces, the centrifugal force that the centrifugal block received reduces gradually until disappearing.

2. This be used for electric bicycle brake block automatic regulating apparatus, it moves to lead electrical pillar through the telescopic link drive, it drives the operation of resistance card to lead electrical pillar, the rethread electromagnet uses with the cooperation of magnetostrictive material, thereby reach the effect that the braking compensation reaches anticipatory braking, after the brake block wearing and tearing appear, thereby the positive leading electrical pillar of telescopic link contacts the magnetic field intensity that changes the electromagnet with the resistance card, make the deformation volume grow of magnetostrictive material, thereby it is more abundant with the car hub contact to realize the brake block, make the braking effect reach anticipatory effect.

Drawings

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

FIG. 2 is a partially enlarged view of the portion A of FIG. 1 according to the present invention;

FIG. 3 is a partially enlarged view of the portion B shown in FIG. 1 according to the present invention;

FIG. 4 is an enlarged view of a portion of portion C of FIG. 1;

FIG. 5 is an enlarged view of a portion D of FIG. 4 according to the present invention.

In the figure: 1. a brake drum; 2. a hub; 3. a brake pump; 4. a brake shoe; 5. a telescopic cylinder; 6. a stationary contact; 7. a movable contact; 8. resistance cards; 9. a telescopic rod; 10. an electromagnet; 11. a conductive post; 12. a brake pad; 13. a metal block; 14. a magnetostrictive material; 15. a positive plate; 16. a dielectric plate; 17. a return spring; 18. a centrifugal block; 19. a voltage dependent resistor; 20. a negative plate; 21. a speed measuring wheel.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, an automatic adjusting device for a brake pad of an electric bicycle comprises a brake drum 1, wherein the outer side of the brake drum 1 is movably connected with a hub 2, the size of the hub 2 is matched with that of the brake drum 1, when the hub 2 rotates along the outer side of the brake drum 1, the speed is reduced under the action of a brake pad 12, so that the purpose of reducing the speed is achieved, the inner wall of the middle part of the brake drum 1 is movably connected with a speed measuring wheel 21, the middle part of the speed measuring wheel 21 is provided with a centrifugal groove, the inner wall of the centrifugal groove is movably connected with a centrifugal block 18, the outer side of the centrifugal block 18 is clamped with a ball, the inner side of the centrifugal block 18 is fixedly connected with a return spring 17, the inner wall of the middle part of the centrifugal block 18 is fixedly connected with a dielectric plate 16, the ball mainly plays a role in reducing friction force to enable the equipment to be more sensitive, and the return spring 17 mainly plays a role in pulling and returning to the centrifugal block 18;

the inner wall of the middle part of the speed measuring wheel 21 is fixedly connected with a piezoresistor 19, the piezoresistor 19 is electrically connected with a negative plate 20, the relative area between the negative plate 20 and the positive plate 15 is changed through a dielectric plate 16, so that the voltage at the tail end of the negative plate 20 is changed, the on-off state of the piezoresistor 19 is controlled, the outer side of the speed measuring wheel 21 is attached to the inner side of the hub 2, the speed measuring wheel 21 mainly detects the rotating speed of the hub 2, if the expected speed reducing effect is not achieved, further reaction is carried out to enable the brake pad 12 to be in contact with the hub 2, the inner wall of the middle part of the brake drum 1 is fixedly connected with a brake pump 3, the inner side of the brake pump 3 is fixedly connected with a brake shoe 4, and the inner wall of the middle part of the brake drum 1 is fixedly connected with a telescopic cylinder 5;

the inner wall of the middle part of the telescopic cylinder 5 is fixedly connected with a static contact 6, the middle part of the telescopic cylinder 5 is provided with a movable groove matched with a telescopic rod 9, the inner wall of the middle part of the telescopic cylinder 5 is fixedly connected with a resistor disc 8, the static contact 6 mainly plays a role of controlling the on-off state of an electromagnet 10 on the inner wall of the middle part of a centrifugal block 18, when a brake shoe 4 moves outwards, the telescopic rod 9 is driven to move, so that a conductive post 11 is driven to be contacted with the resistor disc 8, the electromagnet 10 is fixedly connected with the inner wall of the middle part of a brake drum 1, the telescopic rod 9 is fixedly connected with the inner side of the brake shoe 4, the movable contact 7 is fixedly connected with the outer side of the telescopic rod 9, the front side of the telescopic rod 9 is movably connected with the conductive post 11, the inner wall of the middle part of the brake shoe 4 is movably connected with a magnetostrictive material 14, the inner wall of the middle part of the brake shoe 4 is movably connected with a metal block 13, the outer side of the metal block 13 is fixedly connected with a brake block 12, and the size of the brake block 12 is smaller than that of the brake shoe 4, the metal block 13 moves outwards under the action of the magnetostrictive material 14, so that the brake pad 12 is pressed outwards to realize the contact with the hub 2 with the ever-high friction.

The working principle is as follows: when the electric bicycle runs normally, the electric bicycle is not braked so much, when an emergency or a downhill occurs, braking is usually required, because the brake pad 12 is worn in the process of long-time use, the expected braking effect cannot be achieved, when the brake pad 12 is in the initial stage of use, the brake pump 3 is expanded outwards through an external signal, so that the brake shoe 4 is driven to move outwards, the brake pad 12 is in contact with the inner wall of the hub 2, the purpose of reducing the speed is achieved, when the brake shoe 4 moves outwards, the telescopic rod 9 is driven to move outwards, so that the movable contact 7 is separated from the fixed contact 6, the electromagnet 10 on the inner wall of the middle part of the centrifugal block 18 is powered off, the magnetic field on the inner side of the electromagnet 10 disappears, the repulsive force on the centrifugal block 18 disappears, and when the brake pad 12 is in contact with the hub 2, the effect of reducing the speed is achieved;

the rotating speed of the tachometer wheel 21 is reduced, the centrifugal force applied to the centrifugal block 18 is gradually reduced until the centrifugal force disappears, the centrifugal block 18 moves inwards under the action of the traction force of the return spring 17, when the centrifugal block 18 moves to the innermost side, the dielectric plate 16 is driven to move inwards, the relative area of the negative plate 20 and the positive plate 15 is the smallest, the voltage at the tail end of the negative plate 20 is the smallest, so that the minimum access voltage of the piezoresistor 19 is reached, the electromagnet 10 on the inner wall of the middle part of the brake drum 1 is electrified to generate a magnetic field, the magnetostrictive material 14 is deformed by the action force of the magnetic field to drive the metal block 13 to move outwards, after the brake pad 12 is worn, the conductive column 11 on the front side of the telescopic rod 9 is contacted with the resistor sheet 8 to change the magnetic field intensity of the electromagnet 10, so that the deformation amount of the magnetostrictive material 14 is increased, and the brake pad 12 is more fully contacted with the hub 2, the braking effect can reach the expected effect.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a be used for electric bicycle brake block automatic regulating apparatus, includes brake drum (1), its characterized in that: brake drum (1) middle part inner wall fixedly connected with brake pump (3), inboard fixedly connected with brake hoof (4) of brake pump (3), brake drum (1) middle part inner wall fixedly connected with telescopic cylinder (5), brake drum (1) middle part inner wall fixedly connected with electromagnet (10), inboard fixedly connected with telescopic link (9) of brake hoof (4), telescopic link (9) outside fixedly connected with movable contact (7), telescopic link (9) openly swing joint has leads electrical pillar (11), brake hoof (4) middle part inner wall swing joint has magnetostrictive material (14), brake hoof (4) middle part inner wall swing joint has metal block (13).

2. The automatic adjusting device for the brake pad of the electric bicycle as claimed in claim 1, wherein: the outer side of the brake drum (1) is movably connected with a vehicle hub (2), and the size of the vehicle hub (2) is matched with that of the brake drum (1).

3. The automatic adjusting device for the brake pad of the electric bicycle as claimed in claim 1, wherein: the inner wall of the middle part of the telescopic cylinder (5) is fixedly connected with a stationary contact (6), the middle part of the telescopic cylinder (5) is provided with a movable groove matched with a telescopic rod (9), and the inner wall of the middle part of the telescopic cylinder (5) is fixedly connected with a resistor disc (8).

4. The automatic adjusting device for the brake pad of the electric bicycle as claimed in claim 1, wherein: the outer side of the metal block (13) is fixedly connected with a brake pad (12), and the size of the brake pad (12) is smaller than that of the brake shoe (4).

5. The automatic adjusting device for the brake pad of the electric bicycle as claimed in claim 1, wherein: the inner wall of the middle part of the brake drum (1) is movably connected with a speed measuring wheel (21), and the outer side of the speed measuring wheel (21) is attached to the inner side of the hub (2).

6. The automatic adjusting device for the brake pad of the electric bicycle according to claim 5, wherein: the centrifugal speed measuring device is characterized in that a centrifugal groove is formed in the middle of the speed measuring wheel (21), the inner wall of the centrifugal groove is movably connected with a centrifugal block (18), a ball is clamped on the outer side of the centrifugal block (18), a return spring (17) is fixedly connected to the inner side of the centrifugal block (18), and a dielectric plate (16) is fixedly connected to the inner wall of the middle of the centrifugal block (18).

7. The automatic adjusting device for the brake pad of the electric bicycle according to claim 5, wherein: the inner wall of the middle of the speed measuring wheel (21) is fixedly connected with a positive plate (15), the inner wall of the middle of the speed measuring wheel (21) is fixedly connected with a negative plate (20), and the inner wall of the middle of the speed measuring wheel (21) is fixedly connected with a piezoresistor (19).

8. The automatic adjusting device for the brake pad of the electric bicycle according to claim 5, wherein: the inner wall of the middle part of the speed measuring wheel (21) is fixedly connected with a piezoresistor (19), and the piezoresistor (19) is electrically connected with the negative plate (20).