CN215444862U

CN215444862U - Brake capable of detecting braking torque

Info

Publication number: CN215444862U
Application number: CN202121528143.1U
Authority: CN
Inventors: 张晨蕾; 韩正方; 王博; 韩伍林; 李庆胜; 马飞周; 任军明
Original assignee: Shijiazhuang Wulon Brake Co Ltd
Current assignee: Shijiazhuang Wulon Brake Co Ltd
Priority date: 2021-07-06
Filing date: 2021-07-06
Publication date: 2022-01-07
Anticipated expiration: 2031-07-06

Abstract

The utility model relates to a brake capable of detecting braking torque, which is structurally characterized in that a brake shoe is arranged on a brake body, a clamping groove is formed in the braking surface of the brake shoe, a lining plate is arranged in the clamping groove, a friction liner attached to the front end surface of the lining plate protrudes out of a notch of the clamping groove, a sliding bearing is arranged on the back surface of the lining plate, one end of a tension and compression sensor is connected to the end part of the lining plate, and the other end of the tension and compression sensor is connected to the brake shoe so as to detect micro-displacement of the lining plate along the action direction of braking friction force during braking of the brake and convert the micro-displacement into braking friction force information to be output. The utility model realizes the real-time detection of the braking friction force of various brakes, thereby realizing the real-time detection of the braking torque of the brakes.

Description

Brake capable of detecting braking torque

Technical Field

The utility model relates to a brake, in particular to a brake capable of detecting braking torque.

Background

The prior patent ZL20182056157.1 of the applicant discloses a true value detection sensor for brake torque of a hub brake, and discloses a technical scheme for detecting brake torque of a drum brake. The detection sensor can detect the braking torque of the drum brake, and provides a feasible and effective detection means for judging the working state of the drum brake. Since the braking torque detection sensor detects the minute displacement of the brake arm generated along with the braking force in the braking process to obtain the data of the braking torque, a certain use limitation is caused, and the braking torque detection sensor cannot be applied to other types of brakes. The existing brakes in use need to monitor the braking torque so as to ensure the safety of use.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a brake capable of detecting braking torque, which solves the problem that the existing brakes can not detect braking torque.

The utility model is realized by the following steps: the brake capable of detecting braking torque is characterized in that a brake shoe is arranged on a brake body, a clamping groove is formed in the braking surface of the brake shoe, a lining plate is arranged in the clamping groove, a friction lining attached to the front end surface of the lining plate protrudes out of a notch of the clamping groove, a sliding bearing is arranged on the back surface of the lining plate, one end of a tension and compression sensor is connected to the end portion of the lining plate, and the other end of the tension and compression sensor is connected to the brake shoe so as to detect micro displacement generated by the lining plate along the action direction of braking friction force during braking of the brake and convert the micro displacement into braking friction force information to be output.

Furthermore, a spring pressing sheet is pressed on the brake shoe or a brake machine member fixedly connected with the brake shoe through a fastener, and a pressing edge of the spring pressing sheet is pressed on the edge of the lining plate.

Further, the sliding bearings are ball rows arranged along the length direction of the lining plate.

Further, the moving looseness of the lining plate in the clamping groove along the length direction is larger than the limit deformation of the induction plate in the tension and compression sensor under the condition that the induction plate keeps normal working.

The utility model can also be realized as follows: a brake capable of detecting braking torque is provided with an armature and a brake shoe on a brake body, a clamping groove is formed in a brake shoe connecting surface of the armature, the brake shoe is arranged in the clamping groove, a friction liner attached to the front end face of the brake shoe protrudes out of a notch of the clamping groove, a sliding bearing is arranged on the back face of the brake shoe, one end of a tension and pressure sensor is connected to the end portion of the brake shoe, and the other end of the tension and pressure sensor is connected to the armature so as to detect micro-displacement of the brake shoe generated along the action direction of braking friction force during braking of the brake and convert the micro-displacement into braking friction force information to be output.

When the brake is braked under the condition of power failure, the brake shoe on the brake presses a brake drum or a brake disc under the action of a brake spring or a thruster so as to brake a motor shaft. This braking torque is generated by means of the braking friction between the friction linings provided on the front end faces of the brake shoes and the brake drum or disc. When the brake brakes, the braking friction force generated between the friction liner and the braked member drives the lining plate to generate a micro displacement limited by the tension and compression sensor in the clamping groove of the brake shoe, the direction of the micro displacement is consistent with the direction of the braking friction force generated by applying positive pressure on the brake shoe, the micro displacement can be detected by the tension and compression sensor and converted into detection data reflecting the magnitude of the braking friction force, and therefore the real-time detection of the braking friction force of the brake is realized; and the information of the braking torque when the brake applies the brake can be obtained by matching the structural size of the motor brake drum or the brake disc (namely the data information of the force arm of the braking friction force action). The clamping groove is formed in the brake shoe to accommodate the lining plate and the friction lining, and the sliding bearing is arranged between the lining plate and the brake shoe, so that the lining plate can generate micro displacement along the direction of braking friction force during braking, the safety limiting can be realized through the clamping groove, the friction resistance of the lining plate during moving is reduced to the maximum extent through the sliding bearing, and the detection precision of the tension and compression sensor is improved.

The utility model utilizes the tension and compression sensor to connect the lining plate and the friction lining on the brake shoe in a suspension way, thereby when the brake brakes, the lining plate can generate tensile displacement which changes along with the change of the braking friction force, and the corresponding deformation is generated on the induction plate of the tension and compression sensor, and then the deformation is converted into an electric signal with the stress force by the strain gauge and is output, thereby realizing the real-time detection of the braking friction force of the brake and further realizing the real-time detection of the braking torque of the brake.

Drawings

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

Fig. 2 is a schematic structural view of the brake arm in embodiment 1.

Fig. 3 is a partially enlarged view of a portion a in fig. 1.

Fig. 4 is a partially enlarged view of fig. 2 at B.

FIG. 5 is a schematic view of the compression of the spring preforms against the backing plate.

FIG. 6 is a schematic structural view of embodiment 2.

Fig. 7 is a sectional view taken along line a-a of fig. 6.

Fig. 8 is a partial sectional view taken along line B-B of fig. 7.

Fig. 9 is a partial enlarged view of fig. 8 at D.

Fig. 10 is a partial sectional view taken along line C-C of fig. 7.

FIG. 11 is a schematic structural view of example 3.

FIG. 12 is a schematic structural view of example 4.

Fig. 13 is a cross-sectional view taken along line D-D of fig. 12.

In the figure: 1. the brake device comprises a magnetic device, 2, a brake bolt, 3, a brake arm, 4, a brake pull rod, 5, a brake spring, 6, a brake shoe shaft, 7, a brake shoe, 8, a pin shaft, 9, a tension and compression sensor, 10, a lining plate, 11, a friction lining, 12, a sliding bearing, 13, a spring pressing sheet, 14, a screw, 15, a base, 16, a hydraulic thruster, 17, a brake arm shaft, 18, a brake shoe shaft, 19, a yoke, 20 and an armature.

Detailed Description

Example 1

In fig. 1 and 2, the brake body of the drum brake of the present embodiment includes two oppositely disposed brake arms 3, a magnetic device 1 connected between the two brake arms 3, a brake spring 5 for urging the brake arms 3, and a brake shoe 7 disposed on the brake arms 3. The magnetic device 1 is connected to the upper ends of two oppositely arranged brake arms 3 through brake bolts 2, and a brake releasing handle is arranged on the magnetic device 1. Brake spring 5 cup joints on brake pull rod 4, and brake pull rod 4 fixed connection is on brake arm 3 for inwards promote brake arm 3, in order to press to the brake drum that sets up between two parties. The lower end of the brake arm 3 is hinged on the base or connected on the base through a pin shaft. The brake shoe 7 is articulated on the brake arm 3 by means of a brake shoe shaft 6.

As shown in fig. 1 and 3, a notch is formed on the braking surface of the brake shoe 7, a metal lining plate 10 is arranged in the notch, the shape of the lining plate 10 is the same as that of the notch, and the moving spaciousness in the notch along the length direction is larger than the limit deformation of the induction plate in the tension and compression sensor 9 under the normal working condition. The friction lining 11 attached on the front end face of the lining plate 10 protrudes out of the notch of the clamping groove, the back face of the lining plate 10 is provided with a sliding bearing 12, and the sliding bearing 12 is a ball row arranged along the length direction of the lining plate 10, so that the lining plate 10 and the friction lining 11 can generate micro displacement along the action direction of braking friction force when the brake is braked. The tension and compression sensor 9 comprises a sensing plate and a strain gauge, the lower end of the strain gauge is connected to the upper end part of the lining plate 10 through a shaft, and the upper end of the strain gauge is connected to the upper extending end of the brake shoe 7 through a pin shaft 8. When the brake is braked, the lining plate 10 generates a micro displacement under the action of friction force, the sensing plate of the tension and compression sensor 9 is pulled (or compressed), the sensing plate generates corresponding deformation, the deformation of the sensing plate is converted into stress information by the strain gauge and output, and the detection value of the braking torque of the drum brake can be obtained in real time by combining the radius information of the brake drum.

As shown in fig. 2, 4 and 5, spring pressing pieces 13 are pressed against both sides of the brake shoe 7 by screws 14, and pressing edges of the spring pressing pieces 13 are pressed against edges of the backing plate 10. The spring pressing sheet 13 is arranged to be pressed on the lining plate 10 in a pressing mode, so that the friction resistance when the lining plate moves is reduced, the interference on the tension and compression sensor is reduced, and the detection accuracy of the tension and compression sensor is correspondingly improved.

Example 2

As shown in fig. 6, the present embodiment is a hydraulic brake, and the brake body includes a base 15, two brake arms 3 provided on the base 15, a hydraulic thruster 15 connected between the two brake arms 3, and brake shoes 7 provided at ends of the brake arms 3. The hydraulic thruster 15 is provided with a brake spring 5, and the hydraulic thruster 15 is connected to the rear ends of two oppositely arranged brake arms 3 through a push rod and a pin shaft. The middle part of the brake arm 3 is connected to the base 15 through a brake arm shaft 17, and the inner side of the front part of the brake arm 3 is connected to the brake shoe 7 through a brake shoe shaft 18. The end surfaces of the two brake shoes 7 are opposite, the brake arm shaft 17 is a fulcrum shaft, the brake spring 5 pushes the rear end of the brake arm 3 through the push rod, so that the front end of the brake arm 3 moves oppositely, and the brake shoes 7 connected to the brake arm 3 are pressed on a brake disc relatively, so as to brake the power shaft.

As shown in fig. 7-10, a slot is provided on the braking surface of the brake shoe 7, a metal lining plate 10 is provided in the slot, and the moving allowance of the lining plate 10 in the slot along the long direction is larger than the limit deformation of the sensing plate in the tension and compression sensor 9 under the normal working condition. The friction pad 11 attached to the front end face of the lining plate 10 protrudes from the notch of the clamping groove (fig. 8), the back face of the lining plate 10 is provided with a sliding bearing 12, and the sliding bearing 12 is a ball row arranged along the length direction of the lining plate 10, so that the lining plate 10 and the friction pad 11 can generate micro displacement along the action direction of braking friction force when the brake is braked. The tension and compression sensor 9 comprises a sensing plate and a strain gauge, the lower end of the strain gauge is connected to the upper end of the lining plate 10 through a pin 8 (fig. 9), and the upper end of the strain gauge is connected to the upper extending end of the brake shoe 7 through a pin 8 (fig. 8). When the brake is braked, the lining plate 10 generates a micro displacement under the action of friction force, the induction plate of the tension and compression sensor 9 is pulled (or compressed), the induction plate generates corresponding deformation, the deformation of the induction plate is converted into stress information by the strain gauge and output, and the detection value of the braking torque of the hydraulic brake can be obtained in real time by combining the data information of the acting force arm of the friction lining 11 on the brake disc.

As shown in fig. 7 and 10, spring pressing pieces 13 are respectively pressed against both sides of the brake shoe 7 by screws 14, and the pressing edges of the spring pressing pieces 13 are pressed against the edges of the backing plate 10. The spring pressing sheet 13 is arranged to press against the lining plate 10, so that the friction resistance of the lining plate during movement is reduced, the interference on the tension and compression sensor is reduced, and the detection precision of the tension and compression sensor is correspondingly improved.

Example 3

As shown in fig. 11, the brake body of the plate brake of this embodiment includes a yoke 19, an electromagnetic coil and a brake spring disposed in a predetermined groove of the yoke 19, an armature 20 disposed opposite to the forehead iron 19, and a brake shoe 7 fixed to the armature 20. The yoke 19 is a rectangular plate body, a preset groove is formed on the plate body, and the electromagnetic coil and the brake spring are respectively installed in the corresponding preset groove.

The braking surface of the brake shoe 7 is provided with a clamping groove, a metal lining plate 10 is arranged in the clamping groove, the shape of the lining plate 10 is basically the same as that of the clamping groove, and the movable looseness in the clamping groove along the length direction is larger than the limit deformation of an induction plate in the tension and compression sensor 9 under the condition of keeping normal working. The friction lining 11 attached on the front end face of the lining plate 10 protrudes out of the notch of the clamping groove, the back face of the lining plate 10 is provided with a sliding bearing 12, and the sliding bearing 12 is a ball row arranged along the length direction of the lining plate 10, so that the lining plate 10 and the friction lining 11 can generate micro displacement along the action direction of braking friction force when the brake is braked. The tension and compression sensor 9 comprises an induction plate and a strain gauge, the upper end of the strain gauge is connected to the lower end of the lining plate 10 through a pin shaft, and the lower end of the strain gauge is connected to the armature 20 through a pin shaft 8. When the brake is braked, the lining plate 10 generates a micro displacement under the action of friction force, the induction plate of the tension and compression sensor 9 is pulled (or compressed), the induction plate generates corresponding deformation, the deformation of the induction plate is converted into stress information by the strain gauge and output, and the detection value of the braking torque of the plate brake can be obtained in real time by combining the data information of the acting radius of the friction pad on the brake disc.

Example 4

As shown in fig. 12 and 13, this embodiment is a plate brake, and its basic structure is the same as that of embodiment 3, except that a slot is formed on an end face of an armature 20, a brake shoe 7 is disposed in the slot of the armature 20, and the movable opening of the brake shoe 7 in the slot along the long direction is greater than the limit deformation of a sensing plate in a tension-compression sensor 9 under normal working conditions. Accordingly, the embodiment omits the provision of a backing plate, the friction pad 11 is directly attached to the braking surface of the brake shoe 7, and the friction pad 11 protrudes from the notch of the slot (fig. 13). A sliding bearing 12 is provided on the back of the brake shoe 7, and the sliding bearing 12 is a row of balls provided along the length direction of the brake shoe 7 so that the brake shoe 7 and the friction pad 11 can be slightly displaced in the acting direction of the braking friction force when the brake is applied.

Referring to fig. 11, the tension/compression sensor 9 in this embodiment also includes a sensing plate and a strain gauge, the upper end of which is connected to the lower end of the brake shoe 7 by a pin, and the lower end of which is connected to the armature 20 by a pin 8. When the brake is braked, the brake shoe 7 generates a micro displacement under the action of friction force, the induction plate of the tension and compression sensor 9 is pulled (or compressed), the induction plate generates corresponding deformation, the deformation of the induction plate is converted into stress information by the strain gauge and output, and the detection value of the braking torque of the plate brake can be obtained in real time by combining the data information of the acting radius of the friction pad on the brake disc.

As shown in fig. 13, spring receiving pieces 13 are pressed against both sides of the armature 20 by screws 14, and the pressing edges of the spring receiving pieces 13 are pressed against the edges of the brake shoe 7. The spring pressing sheet 13 is arranged to be in compression joint with the brake shoe 7, so that sliding resistance of the brake shoe can be reduced, interference on the tension and compression sensor is reduced, and detection accuracy of the tension and compression sensor is correspondingly improved.

Claims

1. A brake capable of detecting braking torque is characterized in that a clamping groove is formed in a braking surface of the brake shoe, a lining plate is arranged in the clamping groove, a friction liner attached to the front end face of the lining plate protrudes out of a groove opening of the clamping groove, a sliding bearing is arranged on the back face of the lining plate, one end of a tension and compression sensor is connected to the end portion of the lining plate, the other end of the tension and compression sensor is connected to the brake shoe, so that micro displacement generated by the lining plate along the action direction of braking friction force during braking of the brake can be detected, and the micro displacement is converted into braking friction force information to be output.

2. The brake capable of detecting braking torque as claimed in claim 1, wherein a spring pressing piece is pressed on the brake shoe or a brake mechanism fixedly connected with the brake shoe by a fastening piece, and the pressing edge of the spring pressing piece is pressed on the edge of the lining plate.

3. The brake capable of detecting a braking torque as claimed in claim 1, wherein the slide bearing is a row of balls arranged along a length direction of the lining plate.

4. The brake capable of detecting braking torque as claimed in claim 1, wherein the clearance of the lining plate in the slot along the length direction is greater than the limit deformation of the sensing plate in the tension and compression sensor under the condition of keeping normal working.

5. The brake capable of detecting the braking torque as claimed in claim 1, 2, 3 or 4, wherein the brake is a drum brake, and the brake body includes two opposite brake arms, a magnetic device connected between the two brake arms, a brake spring pushing the brake arms, and a brake shoe provided on the brake arms.

6. The brake capable of detecting the braking torque as claimed in claim 1, 2, 3 or 4, wherein the brake is a hydraulic brake, and the brake body comprises a base, two braking arms arranged on the base, a hydraulic thruster connected between the two braking arms, and braking shoes arranged at the ends of the braking arms.

7. The brake capable of detecting braking torque as claimed in claim 1, 2, 3 or 4, wherein the brake is a plate brake, and the brake body includes a yoke, an electromagnetic coil and a braking spring disposed in a predetermined groove of the yoke, an armature disposed opposite to the brow iron, and a braking shoe fixed to the armature.

8. A brake capable of detecting braking torque is characterized in that a clamping groove is formed in a brake shoe connecting surface of an armature, a brake shoe is arranged in the clamping groove, a friction lining attached to the front end face of the brake shoe protrudes out of a notch of the clamping groove, a sliding bearing is arranged on the back face of the brake shoe, one end of a tension and compression sensor is connected to the end portion of the brake shoe, and the other end of the tension and compression sensor is connected to the armature so as to detect micro displacement of the brake shoe generated along the action direction of braking friction force during braking of the brake and convert the micro displacement into braking friction force information to be output.

9. The brake capable of detecting braking torque as claimed in claim 8, wherein a spring pressing piece is pressed on the armature by a fastening piece, and a pressing edge of the spring pressing piece is pressed on the edge of the brake shoe.

10. The brake capable of detecting brake torque as claimed in claim 8, wherein the clearance of the brake shoe in the slot along the length direction is greater than the limit deformation of the induction plate in the tension and compression sensor under the condition of keeping normal working.