CN211954529U

CN211954529U - Brake torque sensor

Info

Publication number: CN211954529U
Application number: CN202020909093.0U
Authority: CN
Inventors: 韩正方; 韩伍林; 李庆胜; 侯增敏; 赵永磊; 崔德军; 郝雄毅
Original assignee: Shijiazhuang Wulon Brake Co Ltd
Current assignee: Shijiazhuang Wulon Brake Co Ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2020-11-17
Anticipated expiration: 2030-05-26

Abstract

The utility model relates to a stopper braking torque sensor, its structure includes: the brake device comprises a brake arm, a long circular shaft hole arranged on the brake arm of the brake, a connecting plate used for sensing the displacement of a hinge shaft of a brake element along the direction of brake friction force when the brake is applied and converting the sensed displacement into the deformation of a corresponding plate body on the connecting plate body, and a tension and compression sensor used for converting the deformation of the plate body on the connecting plate along with the brake action into stress information and sending the stress information outwards in the form of electric signals or digital signals. The utility model discloses a testing result accords with actual result, can in time detect out the unexpected situation that the stopper takes place, reminds supervision and maintainer in time to eliminate the trouble and the potential safety hazard of stopper, avoids the stopper to reduce or disappear the incident that causes because of braking torque, is favorable to realizing the safety in production.

Description

Brake torque sensor

Technical Field

The utility model relates to a braking torque sensor, specifically speaking are brake braking torque sensor.

Background

At present, a braking torque detection device installed on an electric hydraulic arm disc brake is characterized in that a pressure sensor for detecting the working pressure of a braking spring is additionally installed in a spring box for installing the braking spring, the working pressure of the braking spring is basically equal to the positive pressure when a braking disc of the brake performs friction braking on the braking disc, the magnitude of the friction force applied by the braking disc to the braking disc can be obtained by multiplying the numerical value of the positive pressure by the friction coefficient between the braking disc and the braking disc, and the braking torque of the brake can be obtained by combining the radius of the braking disc, so that the braking torque of the brake can be detected.

The detection mode can only detect the magnitude of the braking torque of the electric hydraulic arm disc brake under the normal working condition, once the braking arm of the brake is jacked, the working pressure of the braking spring still exists and does not change, and at the moment, the braking torque detection device can still obtain the detection result that the braking torque is normal, but actually, the brake does not have any braking force at the moment. In addition, if the friction plate on the brake disc falls off, at the moment, the brake torque detection device can also send out a detection result that the brake torque is normal because the working pressure of the brake spring still exists. When the friction coefficient between the brake disc and the brake disc changes due to oil dripping, water dripping or friction overheating and the like on the brake disc, the braking torque detection device still sends out a detection result that the braking torque is normal.

The reason why the brake torque detection result that does not match the actual situation appears is that the brake torque detection device cannot actually detect the magnitude of the brake friction force because the brake friction force is estimated by the positive pressure, and therefore, the situation where the detection result does not match the actual result is naturally unavoidable. The braking torque detection device is mainly used for detecting the accident condition of the brake in time so as to avoid the safety accident and reduce or even avoid the serious loss of life and property of people.

Disclosure of Invention

The utility model aims at providing a brake braking torque sensor to solve the braking torque and detect the problem that the testing result can appear not conform with the fact under the unexpected circumstances.

The utility model discloses a realize like this: a brake braking torque sensor comprising:

the long circular shaft hole is formed in the brake arm of the brake and used for bearing a brake element hinge shaft, the long direction of the long circular shaft hole is consistent with the direction of friction force applied to a friction surface of a brake element at the same height position with the axis of the brake element hinge shaft during brake, so that the brake element hinge shaft can generate displacement which is changed along the direction of the friction force along with the magnitude of the brake friction force during brake of the brake;

the connecting plate is a plate-shaped body, one end of the connecting plate is fixed on the brake arm of the brake, and the other end of the connecting plate is sleeved on the brake element hinge shaft through a closed hole or an open slot, so that the axis of the brake element hinge shaft is positioned at the long-circle shaft hole central position of the brake arm under the static state, and the brake element and the brake arm are connected in a suspension manner; the connecting plate is used for sensing the braking displacement generated by the hinge shaft of the braking element in the long circular shaft hole when the brake is braked, and generating corresponding plate body deformation on the connecting plate; and

and the tension and compression sensor is fixed at the optimal position on the surface of the connecting plate, which can generate the deformation of the plate body, and is used for converting the deformation of the plate body generated along with the braking action on the connecting plate into stress information and sending the stress information outwards in the form of an electric signal or a digital signal.

The connecting plate is an S-shaped plate body with a rectangular outline, the tension and compression sensor is arranged in the middle of the plate surface of the connecting plate, and after the connecting plate is installed on a brake arm of the brake, the long-direction central line of the connecting plate coincides with the long-direction central line of the long circular shaft hole.

The connecting plate is a rectangular plate body, a fixed end of the connecting plate fixed on the brake arm of the brake is a short-side end, two long sides of the connecting plate body close to the fixed end are respectively provided with a rectangular notch, and the two rectangular notches are the same in size and are symmetrically distributed on the connecting plate; the tension and compression sensor is arranged on the bottom surface of the groove of the rectangular notch, and after the connecting plate is installed on a brake arm of the brake, the long-direction center line of the connecting plate is perpendicular to the long-direction center line of the long circular shaft hole.

The closed hole is a round hole with the diameter slightly larger than that of the hinge shaft of the braking element, or a long round hole with the round radius slightly larger than that of the hinge shaft of the braking element; the long direction of the long round hole is vertical to the long direction of the long round shaft hole of the brake arm after the connecting plate is installed on the brake arm.

The opening groove is an opening long round hole with a semicircular hole opening removed, and the length direction of the opening groove is perpendicular to the length direction of the long round shaft hole of the brake arm after the connecting plate is installed on the brake arm.

When the braking element on the brake clamps the braked element on the equipment to implement braking, the friction braking is realized by means of the friction force between the braked element and the braked element, and the magnitude of the braking torque of the brake is actually represented by the magnitude of the friction force; when the brake brakes, the displacement of the brake element hinge shaft in the long circular shaft hole on the brake arm along the direction of the friction force is in direct proportion to the magnitude of the friction force, so as long as the brake displacement of the brake element hinge shaft can be detected and converted into detection data capable of reflecting the magnitude of the friction force, the detection of the friction force of the brake is realized, and the radius of the braked element of the brake (namely the acting arm of the friction force) is matched to obtain the magnitude of the brake torque. That is, when the brake element brakes, the real-time detection of the brake torque can be realized if the friction force generated when the brake is applied is obtained by multiplying the positive pressure applied by clamping the braked element (such as a cylindrical brake drum or a disc-shaped brake disc) by the friction coefficient between the brake element and the braked element.

The utility model discloses an open the shaft hole of the braking element articulated shaft on the brake arm into long circular shaft hole, realize the suspension through the connecting plate between messenger braking element and the brake arm and be connected, just so can make by braking element articulated shaft produce the braking displacement volume that changes along with the change of braking frictional force size when the stopper brakes; the connecting plate can well sense the displacement, the sensed braking displacement can be converted into the deformation of the plate body of the connecting plate, the plate body deformation on the connecting plate is converted into an electric signal with the stress magnitude by the tension and compression sensor, and the electric signal is sent outwards, so that the real-time detection of the braking friction force of the brake is realized, and the real-time detection of the braking torque of the brake is also realized. The key of the utility model is that.

The utility model discloses can also realize like this: a brake braking torque sensor comprising:

the brake shoe block is provided with an oblong shaft hole which is arranged on a brake shoe block of the outer holding block type brake and is used for connecting a brake shoe block hinge shaft in a penetrating way, and the length direction of the oblong shaft hole is consistent with the direction of friction force applied to the friction surface of the brake shoe block at the position with the same height as the axis of the brake shoe block hinge shaft during braking, so that the brake shoe block can generate displacement which is changed along the direction of the friction force along with the magnitude of the braking friction force during braking of the outer holding block type brake;

the connecting plate is a plate-shaped body, the upper end of the connecting plate is sleeved on the brake shoe block hinge shaft through the circular shaft hole, the lower end of the connecting plate is hinged on the side wall of the brake shoe block through the hole shaft in a matched mode, and the axis of the brake shoe block hinge shaft is located at the long-circle shaft hole central position of the brake shoe block under the static state, so that the brake shoe block and the brake arm are in suspension connection; the connecting plate is used for sensing the braking displacement generated by the brake shoe along the direction of the friction force when the outer holding block type brake brakes, and generating corresponding plate body deformation on the connecting plate; and

The connecting plate is an S-shaped plate body with a rectangular outline, the tension and compression sensor is arranged in the middle of the surface of the connecting plate, and after the connecting plate is installed on a brake shoe block of the outer holding block type brake, the long-direction central line of the connecting plate coincides with the long-direction central line of the long circular shaft hole.

the long circular shaft hole is formed in a brake pad of the arm disc brake and used for penetrating and connecting a brake pad hinge shaft, the long direction of the long circular shaft hole is consistent with the direction of friction force applied to a position on a friction surface of the brake pad at the same height with the axis of the brake pad hinge shaft during braking, so that the brake pad can generate displacement which is changed along the direction of the friction force along with the magnitude of the braking friction force during braking of the arm disc brake;

the connecting plate is a plate-shaped body, the lower end of the connecting plate is sleeved on a brake shoe hinging shaft extending into the space between the two rib plates on the back of the brake shoe through a circular shaft hole, and the upper end of the connecting plate is provided with a through hole which is sleeved on a pin shaft arranged between the two rib plates on the back of the brake shoe, so that the connecting plate is longitudinally arranged in a groove formed between the two rib plates on the back of the brake shoe, and the brake shoe and the brake arm are connected in a suspension manner; the connecting plate is used for sensing the braking displacement generated by the brake shoe along the direction of the friction force when the arm disc type brake brakes and generates corresponding plate body deformation on the connecting plate; and

The connecting plate is an S-shaped plate body with a rectangular outline, the tension and compression sensor is arranged in the middle of the plate surface of the connecting plate, and after the connecting plate is installed on a brake pad of the arm disc brake, the long-direction central line of the connecting plate is overlapped with the long-direction central line of the long circular shaft hole.

The utility model overcomes current braking torque sensor leads to the misstatement phenomenon that the testing result that appears under the brake accident condition is inconsistent with actual conditions because of the braking frictional force that can not detect the stopper, owing to be the real-time detection to brake frictional force, therefore its testing result can be along with the braking element and by the change of the coefficient of friction between the braking element and change, and accord with actual conditions, can in time detect out the accident situation that the stopper takes place from this, remind the trouble and the potential safety hazard of supervision and maintainer in time elimination stopper, avoided the stopper because of the reduction goods of braking torque disappear the incident that causes, be favorable to realizing the safety in production, be favorable to production and conveying equipment's safe handling, the safety of people's property life has been ensured.

Drawings

Fig. 1 is a schematic structural view of an arm disc brake.

Fig. 2 is a schematic structural view of embodiment 1 of the present invention.

Fig. 3 and 4 are schematic structural views of two connection plates used in embodiment 1.

Fig. 5 is a schematic structural view of embodiment 2 of the present invention.

Fig. 6 and 7 are schematic structural views of two types of connection plates used in embodiment 2.

Fig. 8 is a schematic structural view of embodiment 3 of the present invention.

Fig. 9 is a schematic structural view of embodiment 4 of the present invention.

Fig. 10 is a schematic structural view of a shoe block in embodiment 4.

Fig. 11 is a plan view of embodiment 5 of the present invention.

Fig. 12 is a schematic side view of a brake pad according to embodiment 5.

FIG. 13 is a partial structural view of embodiment 5.

In the figure: 1. the brake shoe comprises a brake arm, 2, a brake shoe articulated shaft, 3, an oblong shaft hole, 4, a connecting plate, 5, a closed hole, 6, an open slot, 7, a tension and compression sensor, 8, a brake shoe, 9, a brake shoe articulated shaft, 10, a brake drum, 11, a rectangular notch, 12, a brake shoe, 13, a ribbed plate, 14 and a pin shaft.

Detailed Description

Example 1:

the present embodiment is a brake braking torque sensor suitable for use in an arm disc brake. The braking torque sensor comprises an oblong shaft hole arranged on a braking arm of the brake, a connecting plate for connecting the braking arm and a braking shoe block, a tension-compression sensor arranged on the connecting plate and the like.

In the arm disc brake shown in fig. 1, the shaft hole of the brake arm 1 for bearing the brake pad hinge shaft 2 is designed as an oblong shaft hole 3, and the length direction of the oblong shaft hole 3 is consistent with the direction of the friction force applied to the friction surface of the brake pad at the same height position as the shaft center of the brake pad hinge shaft 2 during braking. Thus, when the arm disc brake brakes to brake, under the action of the braking friction force, the brake pad hinge shaft 2 can move upwards or downwards along the long round shaft hole 3 of the brake arm 1 to form a braking displacement, the specific up-down moving direction is related to the rotation direction of the braked element, namely a brake disc, and the magnitude of the braking displacement is proportional to the product of the positive pressure applied to the brake disc by the arm disc brake during braking and the friction coefficient between the brake pad and the brake disc.

The connecting plate 4 is a plate-like structural member for detecting the brake displacement amount of the brake pad hinge shaft. As shown in fig. 3 and 4, the connecting plate 4 has a specific structure that two slits parallel to the short sides of the plate body are formed on the plate surface of one rectangular plate body, and the opening directions of the two slits are opposite, so that the plate surface of the connecting plate is divided into three relatively independent parts which are connected in sequence, and the connecting plate 4 forms an S-shaped plate body with a rectangular outline. The plate body of the connecting plate 4 is provided with a closed hole 5 (figure 3) or an open slot 6 (figure 4) for sleeving a hinge shaft of the brake pad. The closed hole 5 can be a round hole with the diameter slightly larger than that of the hinge shaft of the brake pad, or can be a long round hole with the round radius slightly larger than that of the hinge shaft of the brake pad. And the long direction of the oblong hole is perpendicular to the long direction of the brake arm oblong shaft hole 3 after the connecting plate 4 is mounted on the brake arm 1 (fig. 2).

The closed hole 5 or the open slot 6 is opened at one end of the connecting plate body, after the upper end of the connecting plate 4 is fixed on the brake arm 1 of the brake, the closed hole 5 or the open slot 6 at the lower end of the plate body is sleeved on the brake pad hinge shaft 2, and the longitudinal center line of the plate body is coincident or basically coincident with the longitudinal center line of the long circular shaft hole 3 on the brake arm 1 (figure 2).

In fig. 2, two groups (namely 4) of brake arms 1 of the arm disc brake are respectively provided with a connecting plate 4 of an S-shaped plate body on the inner side surface, the two connecting plates 4 are symmetrically arranged, the upper end of the connecting plate 4 is fixed on the inner side surface of the brake arm 1, the lower end of the connecting plate 4 is sleeved on a brake pad hinge shaft 2 through a closed hole 5, the axis of the brake pad hinge shaft is located at the long-direction central position of an oblong shaft hole 3 of the brake arm 1 under the static state, and therefore the brake pad and the brake arm 1 are connected in a suspension mode through the connecting plate 4. When the brake is braked, the brake pad hinge shaft 2 generates brake displacement along with the brake pad, and the connecting plate 4 connected with the brake pad hinge shaft can sense the brake displacement and generate corresponding plate body deformation on the connecting plate 4.

In fig. 2, the tension/compression sensor 7 is fixed at the middle position on the plate surface of the connecting plate, which is the best position for the connecting plate to generate plate body deformation. The tension and compression sensor 7 converts the deformation of the plate body generated along with the braking action on the connecting plate into stress information, and sends the stress information outwards in the form of electric signals or digital signals. The stress information can be regarded as the friction force generated when the brake brakes, and the braking friction force is multiplied by the radius of the brake disc to obtain the braking torque of the brake.

Example 2:

as shown in fig. 5, the basic structure of the brake torque sensor applied to the arm disc brake in this embodiment is basically the same as that in embodiment 1, except that the specific structure and the mounting position of the connecting plate are different.

As shown in fig. 6 and 7, in this embodiment, the connecting plate 4 is a rectangular plate, the fixed end of the connecting plate fixed on the brake arm 1 is a short-side end, two long sides of the connecting plate 4 close to the fixed end are respectively provided with rectangular notches 11, the two rectangular notches have the same size and are symmetrically distributed on the connecting plate, so that the plate between the two rectangular notches presents a neck characteristic and becomes the best position where the plate can sense the brake displacement and generate plate deformation. Tension and compression sensors (not shown) are respectively provided on the groove bottom surfaces of the two rectangular notches 11 of the connecting plate 4.

Both the closed holes 5 (fig. 6) and the open grooves 6 (fig. 7) can be opened in the web 4. The closed hole 5 or the open slot 6 is arranged at one end of the connecting plate body opposite to the fixed end, and the opening of the open slot 6 is positioned on the short edge of the connecting plate 4. The closed hole 5 can be a round hole with the diameter slightly larger than that of the brake pad hinging shaft, or an oblong hole with the radius slightly larger than that of the brake pad hinging shaft, and the length direction of the oblong hole is vertical to the length direction of the brake arm oblong shaft hole 3 after the connecting plate 4 is installed on the brake arm 1. The opening groove 6 is an opening long round hole with a semicircular hole, and the length direction of the opening groove is perpendicular to the length direction of the long round shaft hole 3 on the brake arm after the connecting plate 4 is installed on the brake arm 1 (figure 5).

In fig. 5, after the connecting plate 4 is attached to the brake arm 1 of the brake, the longitudinal center line of the connecting plate 4 is perpendicular to the longitudinal center line of the oblong shaft hole 3. Like this, through installing foretell connecting plate 4 respectively at the medial surface of two sets of brake arms 1 of arm disc brake, two connecting plates 4 of installation are the symmetry setting on every group brake arm, the one end of connecting plate 4 is fixed on the side edge of brake arm 1, the other end of connecting plate 4 cup joints on brake shoe articulated shaft 2 through open slot (or closed hole), make the axle center of brake shoe articulated shaft lie in the long to central position in long circular shaft hole 3 of brake arm 1 under static state, thereby constitute the suspension through connecting plate 4 and be connected between brake arm 1. Because the brake shoe articulated shaft 2 is transversely picked up by the connecting plate 4, thereby the shaft end of the brake shoe articulated shaft 2 is positioned in the middle part of the long circular shaft hole 3 of the brake arm, when the brake is braked, the brake shoe articulated shaft 2 can generate vertical brake displacement along with the brake shoe, thus, the brake displacement can be sensed on the connecting plate 4, the plate body deformation corresponding to the brake displacement is generated on the groove bottom surface of the rectangular notch of the connecting plate 4, the plate body deformation can be converted into stress information by the tension and compression sensor arranged on the groove bottom surface of the rectangular notch 11, and the stress information is sent outwards in the form of electric signals or digital signals.

Example 3:

the embodiment is a brake braking torque sensor suitable for an outer holding block type brake. The braking torque sensor comprises an oblong shaft hole arranged on a braking arm of the brake, a connecting plate for connecting the braking arm and a brake shoe block, a pull-press sensor arranged on the connecting plate and the like.

In the outer-holding block type brake shown in fig. 8, a brake shoe 8 as a brake element is mounted on each of the two brake arms 1, and the axle holes of the two brake arms 1 for bearing the brake shoe hinge shaft 9 are designed into oblong axle holes 3, and the length direction of the oblong axle holes 3 is consistent with the direction of friction force applied to the friction surface of the brake shoe at the same height position as the axle center of the brake shoe hinge shaft 9 during braking. Therefore, when the outer holding block type brake is used for braking, under the action of the braking friction force, the brake shoe articulated shaft 9 can move upwards or downwards along the long-round shaft hole 3 of the brake arm 1 to form a braking displacement, the specific up-down moving direction is related to the rotating direction of a braked element, namely the brake drum 10, and the magnitude of the braking displacement is in direct proportion to the magnitude of the product of the positive pressure applied to the brake drum by the outer holding block type brake during braking and the friction coefficient between the brake shoe and the brake drum.

The structure of the connecting plate 4 in this embodiment is the same as that in embodiment 1, and is not described again.

In fig. 8, two connecting plates 4 of an S-shaped plate body are respectively installed on two outer sides of two brake arms 1 of an outer holding block type brake, the two connecting plates 4 on each brake arm 1 are symmetrically arranged, and the two connecting plates 4 on the same side of the two brake arms are also symmetrically arranged. The upper end of the connecting plate 4 is arranged on the outer side wall of the brake arm 1 in a bolt fixing or protruding shaft hinging mode and the like, the lower end of the connecting plate 4 is sleeved on the brake shoe block hinge shaft 9 through a circular closed hole with the diameter slightly larger than that of the hinge shaft, so that the axis of the brake shoe block hinge shaft 9 is positioned at the long-direction central position of the long circular shaft hole 3 of the brake arm 1 under the static state, and the brake shoe block 8 is connected with the brake arm 1 in a suspension mode through the connecting plate 4. Because the brake shoe block 8 is connected with the brake arm 1 through the connecting plate 4, and the shaft end of the brake shoe block hinge shaft 9 is positioned in the middle of the long circular shaft hole 3 of the brake arm, the connecting plate 4 can feel the braking displacement of the brake shoe block hinge shaft 9 when the brake is braked, and the corresponding plate body deformation is generated on the connecting plate 4.

In fig. 8, the tension/compression sensor 7 is fixed at the middle position on the plate surface of the connecting plate, and this position is the best position for the connecting plate to generate plate deformation. The tension and compression sensor 7 converts the deformation of the plate body generated along with the braking action on the connecting plate into stress information, and sends the stress information outwards in the form of electric signals or digital signals.

Example 4:

as shown in fig. 9, the present embodiment is also a brake braking torque sensor applied to an outer-locking type brake, which also constructs a floating connection between a brake arm 1 and a brake shoe block 8 through an oblong shaft hole 3 and a connecting plate 4, except that the oblong shaft hole 3 formed on the brake arm 1 in the embodiment 3 is changed to be formed on the brake shoe block 8, and of course, the connection mode of the connecting plate 4 is changed accordingly.

As shown in fig. 9, the utility model includes an oblong shaft hole 3 opened on the shoe block 8 of the brake, a connecting plate 4 connecting the brake arm 1 and the shoe block 8, and a tension/compression sensor 7 provided on the connecting plate 4.

In the outer embracing type brake shown in fig. 9, the shaft hole for passing through the brake shoe articulated shaft on the brake arm 1 is still a round hole, while the shaft hole for passing through the brake shoe articulated shaft 9 on the brake shoe 8 is designed to be an oblong shaft hole 3 (fig. 10), the length direction of the oblong shaft hole 3 is consistent with the direction of the friction force applied at the same height position on the friction surface of the brake shoe at the time of braking, as the shaft center of the brake shoe articulated shaft, so that the brake shoe can generate the displacement which is changed along the direction of the friction force along with the magnitude of the braking friction force when the outer embracing type brake brakes.

The structure of the connecting plate 4 is the same as that of the connecting plate in embodiment 3, but the installation direction is opposite, namely, the upper end of the connecting plate is sleeved on the brake shoe block hinge shaft 9 through a circular shaft hole, the lower end of the connecting plate is hinged on the side wall of the brake shoe block 8 through the matching of a circular hole and a convex shaft, so that the axis of the brake shoe block hinge shaft is positioned at the middle position of the long circular shaft hole 3 of the brake shoe block 8 in the static state, and the brake shoe block 8 and the brake arm 1 form suspension connection. Thus, when the brake is braked, the connecting plate 4 can sense the braking displacement of the brake shoe 8, and corresponding plate body deformation is generated on the connecting plate 4.

In fig. 9, the tension/compression sensor 7 is fixed in the middle of the plate surface of the connecting plate 4, which is the best position for the connecting plate to produce plate deformation. The tension and compression sensor 7 converts the plate body deformation generated along with the braking action on the connecting plate 4 into stress information, and sends the stress information outwards in the form of electric signals or digital signals.

Example 5:

as shown in fig. 11, the present embodiment is a brake braking torque sensor applied to an arm disc brake, which also uses the oblong shaft hole 3 and the connecting plate 4 to construct the suspension connection between the brake arm 1 and the brake pad 12, except that the oblong shaft hole 3 formed on the brake arm 1 in embodiment 1 is changed to be formed on the brake pad 12, and of course, the arrangement and connection manner of the connecting plate 4 are changed accordingly.

As shown in fig. 11, the utility model includes an oblong shaft hole 3 opened on the brake pad 12, a connecting plate 4 connecting the brake arm 1 and the brake pad 12, and a tension/compression sensor 7 provided on the connecting plate 4.

In the arm disc brake shown in fig. 11, the shaft hole for passing the brake pad hinge shaft on the brake arm 1 is still a circular hole, while the shaft hole for passing the brake pad hinge shaft on the brake pad 12 is designed as an oblong shaft hole 3 (fig. 12), the long direction of the oblong shaft hole 3 is consistent with the direction of the friction force applied at the same height position on the friction surface of the brake pad as the shaft center of the brake pad hinge shaft during braking, so that the brake pad 12 can generate the displacement amount which is changed along the direction of the brake friction force along with the magnitude of the brake friction force during braking of the arm disc brake.

The construction of the connection plate 4 is the same as that of the connection plate in embodiment 1 except that the thickness thereof is increased and the mounting position is changed. As shown in fig. 13, the lower end of the connecting plate 4 is sleeved on the brake shoe hinge shaft 2 extending between the two vertical rib plates 13 on the back of the brake shoe 12 through a circular shaft hole, the upper end of the connecting plate 4 is provided with a through hole sleeved on the pin 14, and the pin 14 is connected on the two rib plates 13 on the back of the brake shoe in a penetrating manner, so that the connecting plate 4 is longitudinally arranged in a groove formed between the two rib plates 13 on the back of the brake shoe, and the brake shoe 12 and the brake arm 1 are connected in a suspending manner. Thus, when the brake is braked, the connecting plate 4 can sense the brake displacement generated by the brake pad 12 along the direction of the brake friction force, and the corresponding plate body deformation is generated on the connecting plate 4.

In fig. 11, after the connecting plate 4 is attached to the brake pad 12 of the arm disc brake, the longitudinal center line of the connecting plate 4 coincides with the longitudinal center line of the oblong shaft hole 3 in the brake pad 12 (fig. 11).

In fig. 11, the tension/compression sensor 7 is fixed in the middle of the plate surface of the connecting plate 4, which is the best position for the connecting plate 4 to generate plate deformation. The tension and compression sensor 7 converts the plate body deformation generated along with the braking action on the connecting plate 4 into stress information, and sends the stress information outwards in the form of electric signals or digital signals.

Claims

1. A brake braking torque sensor, comprising:

the connecting plate is a plate-shaped body, one end of the connecting plate is fixed on the brake arm of the brake, and the other end of the connecting plate is sleeved on the brake element hinge shaft through a closed hole or an open slot, so that the axis of the brake element hinge shaft is positioned at the long-axis central position of the long circular shaft hole of the brake arm under the static state; the connecting plate is used for sensing the braking displacement generated by the hinge shaft of the braking element in the long circular shaft hole when the brake is braked, and generating corresponding plate body deformation on the connecting plate; and

2. The brake braking torque transducer of claim 1, wherein the connecting plate is an S-shaped plate having a rectangular profile, the tension and compression sensor is disposed in a center of a plate surface of the connecting plate, and a longitudinal centerline of the connecting plate coincides with a longitudinal centerline of the oblong shaft hole after the connecting plate is mounted on the brake arm of the brake.

3. The brake torque transducer of claim 1, wherein the connecting plate is a rectangular plate, the fixed end of the connecting plate fixed to the brake arm is a short end, rectangular notches are formed in two long sides of the connecting plate close to the fixed end, and the two rectangular notches are the same in size and are symmetrically distributed on the connecting plate; the tension and compression sensor is arranged on the bottom surface of the groove of the rectangular notch, and after the connecting plate is installed on a brake arm of the brake, the long-direction center line of the connecting plate is perpendicular to the long-direction center line of the long circular shaft hole.

4. The brake braking torque transducer of claim 2 or 3, wherein the closing hole is a circular hole having a diameter slightly larger than the diameter of the hinge shaft of the brake element, or an oblong hole having a radius slightly larger than the radius of the hinge shaft of the brake element; the long direction of the long round hole is vertical to the long direction of the long round shaft hole of the brake arm after the connecting plate is installed on the brake arm.

5. The brake torque transducer of claim 2 or 3, wherein the open slot is an open oblong hole with a semicircular opening removed, and the length direction of the open slot is perpendicular to the length direction of the oblong hole of the brake arm after the attachment plate is attached to the brake arm.

6. A brake braking torque sensor, comprising:

the connecting plate is a plate-shaped body, the upper end of the connecting plate is sleeved on the brake shoe block hinge shaft through the circular shaft hole, and the lower end of the connecting plate is hinged on the side wall of the brake shoe block through the hole shaft in a matched mode, so that the axis of the brake shoe block hinge shaft is positioned at the long-circle shaft hole of the brake shoe block in the middle in the length direction under the static state; the connecting plate is used for sensing the braking displacement generated by the brake shoe along the direction of the friction force when the outer holding block type brake brakes, and generating corresponding plate body deformation on the connecting plate; and

7. The brake braking torque transducer of claim 6, wherein the connecting plate is an S-shaped plate with a rectangular outline, the tension and compression sensor is arranged in the middle of the plate surface of the connecting plate, and after the connecting plate is installed on the brake shoe of the outer surrounding block type brake, the long-direction center line of the connecting plate is coincident with the long-direction center line of the long circular shaft hole.

8. A brake braking torque sensor, comprising:

the connecting plate is a plate-shaped body, the lower end of the connecting plate is sleeved on a brake shoe hinge shaft extending into the space between the two rib plates on the back of the brake shoe through a circular shaft hole, and the upper end of the connecting plate is provided with a through hole which is sleeved on a pin shaft arranged between the two rib plates on the back of the brake shoe, so that the connecting plate is longitudinally arranged in a groove formed between the two rib plates on the back of the brake shoe; the connecting plate is used for sensing the braking displacement generated by the brake shoe along the direction of the friction force when the arm disc type brake brakes and generates corresponding plate body deformation on the connecting plate; and

9. The brake braking torque transducer of claim 8, wherein the connecting plate is an S-shaped plate having a rectangular profile, the tension and compression sensor is disposed in a center portion of a plate surface of the connecting plate, and a longitudinal centerline of the connecting plate coincides with a longitudinal centerline of the oblong shaft hole after the connecting plate is mounted on the brake pad of the arm disc brake.