CN216519328U

CN216519328U - Force measuring brake

Info

Publication number: CN216519328U
Application number: CN202122746691.8U
Authority: CN
Inventors: 张晨蕾; 韩正方; 李庆胜; 韩伍林
Original assignee: Shijiazhuang Wulon Brake Co Ltd
Current assignee: Shijiazhuang Wulon Brake Co Ltd
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-05-13
Anticipated expiration: 2031-11-10

Abstract

The utility model relates to a force measuring brake, which structurally comprises a base and a brake arm hinged with the base through a brake arm shaft, wherein a shaft hole used for penetrating and connecting the brake arm shaft on the base is a long round hole formed along the length direction of the brake arm, a pin shaft hole is also formed in the base, a pin shaft sensor is penetrated and connected in the pin shaft hole, a connecting plate is arranged in a gap at the lower part of the brake arm, the pin shaft sensor and the brake arm shaft are respectively penetrated and connected in a round through hole in the connecting plate, and the arrangement distance of the two round through holes on the connecting plate ensures that the axis of the brake arm shaft under the static state is positioned at the middle position in the length direction of the shaft hole. The utility model can detect the braking friction force and braking torque of the brake in real time, can send out failure early warning information in time, and reminds supervision and maintenance personnel to adopt countermeasures, thereby ensuring the use safety of hoisting equipment.

Description

Force measuring brake

Technical Field

The utility model relates to a brake capable of measuring braking friction, in particular to a force measuring brake capable of detecting braking friction of the brake.

Background

CN108373089A of the applicant's prior application discloses a brake torque true value detection sensor and a brake torque true value detection method for a hub brake. The braking torque true value detection sensor comprises a base plate fixed on the brake base and a tension and compression sensor attached to the base plate; the base plate is divided into a suspended extension part with a suspended bottom edge and a fixed connecting part fixedly connected with the brake base, and a transverse through hole is formed in the basic suspended extension part and used for being connected with a brake arm hinge shaft in a penetrating manner so as to convert a vertical acting force generated during braking of the brake arm into a pulling and pressing acting force on the base plate through the brake arm hinge shaft; the tension and compression sensor is attached to the suspended extension portion between the transverse through hole and the fixed connecting portion on the base plate and used for detecting tension and compression acting force applied to the base plate, and a braking torque true value of the drum brake can be obtained through calculation by combining the geometric size of a brake drum on hoisting equipment provided with the drum brake.

The patent provides a brand new way of detecting the brake torque of the brake in real time. However, the structure of the true braking torque detecting sensor is also somewhat complicated, and the installation on the brake is also inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a force measuring brake to solve the problems of complex structure and inconvenient installation of a brake braking torque true value detection sensor.

The utility model is realized by the following steps: a force measuring brake comprises a base and a brake arm hinged to the base through a brake arm shaft, wherein a shaft hole used for penetrating the brake arm shaft on the base is a long round hole formed in the length direction of the brake arm, a pin shaft hole is further formed in the base, a pin shaft sensor is penetrated and connected in the pin shaft hole, a connecting plate is arranged in a gap in the lower portion of the brake arm, the pin shaft sensor and the brake arm shaft are respectively penetrated and connected in a round through hole in the connecting plate, and the arrangement distance of the two round through holes in the connecting plate enables the axis of the static brake arm shaft to be located in the middle position in the length direction of the shaft hole.

Furthermore, the connecting plate is used for transmitting the braking friction force transmitted by the braking arm to the pin sensor, and the pin sensor is used for converting the stress information into an electric signal and sending the electric signal outwards.

Furthermore, the centers of the two circular through holes on the connecting plate are positioned on the longitudinal central line of the connecting plate, and the longitudinal central line of the connecting plate and the longitudinal central line of the shaft hole on the connecting lug are positioned on the same vertical plane.

Furthermore, a shaft sleeve is connected to the brake arm shaft, and the wheel surface of the shaft sleeve is attached to the inner edge of the shaft hole in the connecting lug. Therefore, the sliding friction of the pin shaft sensor in the shaft hole can be changed into the rolling friction between the shaft sleeve and the inner edge of the shaft hole, so that the friction resistance caused by the sliding friction is greatly reduced, the service life of the machine part is correspondingly prolonged, and the detection precision of the braking friction force is correspondingly improved.

Furthermore, a support plate with a through hole is fixed on the connecting lug at the port of the shaft hole, a wear-resistant strip is lined at the inner edge of the through hole of the support plate, a shaft sleeve is connected on the brake arm shaft, and the wheel surface of the shaft sleeve is attached to the wear-resistant strip. Therefore, the support plate and the wear-resistant strip can be used as supports of the brake arm shaft during braking, so that the brake arm shaft is prevented from moving and clamping stagnation at the worn part due to abrasion of the inner edge of the shaft hole, the detection precision of the brake friction force can be improved, and the service life is correspondingly prolonged.

According to the utility model, the brake arm is stably connected with the base through the brake arm shaft, the connecting plate and the pin shaft sensor by arranging the connecting plate which is connected with the brake arm shaft and the pin shaft sensor in a penetrating manner; the shaft hole penetrating through the brake arm shaft on the base is formed into the vertical long round hole, so that when the brake arm shaft generates micro-expansion change along the vertical direction of the brake arm, all the changed acting force is transmitted to the connecting plate and transmitted to the pin shaft sensor through the connecting plate, and therefore, the pin shaft sensor can be used, when the brake is braked, the brake friction force generated by the brake shoe applying pressure to the brake drum is detected, and real-time detection of the brake friction force is achieved. The utility model is applicable to drum brakes and disc-arm brakes.

The utility model can also be realized as follows: a force measuring brake comprises a base and a brake arm hinged with the base through a brake arm shaft, wherein a shaft hole used for being connected with the brake arm shaft in a penetrating mode is a long circular hole formed in the length direction of the brake arm, a pin shaft hole is further formed in the brake arm, a pin shaft sensor is connected in the pin shaft hole in a penetrating mode, a connecting plate is arranged in a gap in the lower portion of the brake arm, the pin shaft sensor and the brake arm shaft are connected in a circular through hole in a penetrating mode on the connecting plate in a penetrating mode respectively, and the arrangement distance of the two circular through holes in the connecting plate enables the axis of the brake arm shaft in a static state to be located in the middle position of the length direction of the shaft hole.

Furthermore, the centers of the two circular through holes on the connecting plate are positioned on the longitudinal central line of the connecting plate, and the longitudinal central line of the connecting plate and the longitudinal central line of the shaft hole on the brake arm are positioned on the same vertical plane.

Furthermore, a shaft sleeve is connected to the brake arm shaft, and the wheel surface of the shaft sleeve is attached to the inner edge of the shaft hole in the brake arm.

Furthermore, a support plate with a through hole is fixed on the brake arm at the end opening of the shaft hole, a wear-resistant strip is lined at the inner edge of the through hole of the support plate, a shaft sleeve is connected on the brake arm shaft, and the wheel surface of the shaft sleeve is attached to the wear-resistant strip.

The utility model can also be realized as follows: a force measuring brake comprises a brake arm and a brake shoe hinged with the brake arm through a brake shoe shaft, wherein a shaft hole used for penetrating the brake shoe shaft on the brake arm is a long round hole formed in the length direction of the brake arm, a pin shaft hole is formed in the brake arm, a pin shaft sensor is penetrated and connected in the pin shaft hole, a connecting plate is arranged in a gap in the brake arm, the pin shaft sensor and the brake shoe shaft are respectively penetrated and connected in a round through hole in the connecting plate, and the arrangement distance of the two round through holes in the connecting plate enables the static axis of the brake shoe shaft to be located at the middle position in the length direction of the shaft hole.

Furthermore, the connecting plate is used for transmitting the braking friction force transmitted by the brake shoe shaft to the pin sensor, and the pin sensor is used for converting the stress information into an electric signal and sending the electric signal outwards.

Furthermore, a shaft sleeve is connected to the brake shoe shaft, and the wheel surface of the shaft sleeve is attached to the inner edge of the shaft hole in the brake arm.

Furthermore, a support plate with a through hole is fixed on the brake arm at the end opening of the shaft hole, a wear-resistant strip is lined at the inner edge of the through hole of the support plate, a shaft sleeve is connected on the brake shoe shaft, and the shaft sleeve is attached to the wear-resistant strip.

The brake shoe shaft is stably connected with the brake arm through the connecting plate and the pin shaft sensor by arranging the connecting plate which is connected with the brake shoe shaft and the pin shaft sensor in a penetrating way; the shaft hole penetrating through the brake shoe shaft on the brake arm is formed into the vertical long circular hole, so that when the position of the brake shoe shaft changes along the vertical direction, acting force generating the change is transmitted to the connecting plate and transmitted to the pin shaft sensor through the connecting plate, the pin shaft sensor can be used, when the brake is braked, the brake friction force generated by the brake shoe applying pressure to the brake drum is detected, and therefore real-time detection of the brake friction force of the brake is achieved.

According to the utility model, the detected braking friction force is multiplied by the radius of the brake (namely the action arm of the braking friction force), so that the braking torque of the brake can be detected. When the detected brake torque of the brake does not meet the requirement of the design specification, fault alarm or early warning information can be sent out, so that supervision and maintenance personnel are reminded to adopt corresponding measures, faults and potential safety hazards of the brake are eliminated in time, and the use safety of the hoisting equipment is ensured.

Drawings

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

Fig. 2 is a side view of fig. 1.

FIG. 3 is a schematic structural view of embodiment 2.

Fig. 4 is a side view of fig. 3.

FIG. 5 is a schematic structural view of example 3.

Fig. 6 is a side view of fig. 5.

FIG. 7 is a schematic structural view of example 4.

Fig. 8 is a side view of fig. 7.

Fig. 9 is a schematic structural view of the connection plate.

FIG. 10 is a partial schematic view of the attachment of the brackets and wear strips to the axle holes.

Fig. 11 is a schematic view of the matching structure of the shaft sleeve and the wear-resistant strip.

In the figure: 1. the brake device comprises a brake arm, 2, a brake arm shaft, 3, a shaft hole, 4, a connecting plate, 5, a brake shoe, 6, a brake shoe shaft, 7, a pin shaft sensor, 8, a base, 9, a connecting lug, 10, a brake drum, 11, a brake electromagnet, 12, a brake spring, 13, a brake pull rod, 15, a frame, 16, a hole, 17, a limit retainer ring, 18, a shaft sleeve, 19, a wear-resistant strip, 20 and a support plate.

Detailed Description

Example 1:

as shown in fig. 1 and 2, a set of connecting lugs 9 extending upwards are respectively arranged at two ends of a base 8 of the brake, and two brake arms 1 are respectively hinged with the connecting lugs 9 at two ends of the base 8 through brake arm shafts 2. The upper end of the brake arm 1 is hinged on a frame 15 through a connecting shaft, and a hole 16 which is connected with the connecting shaft in a penetrating way on the frame is a transverse long round hole (shown in figure 1) and used for absorbing a transverse micro-displacement component generated by the brake arm during braking so as to ensure that a vertical micro-displacement component generated by the brake arm during braking can be detected; the vertical micro-displacement component is the action direction of the braking friction force generated by the brake shoe at the horizontal height of the brake shoe shaft core, and reflects the real data of the braking friction force applied by the brake shoe to the brake drum. The frame 15 is also connected with common components such as a brake electromagnet 11, a brake pull rod 13, a brake spring 12 and the like. The middle parts of the two brake arms 1 are respectively connected with a brake shoe 5, the two brake shoes 5 are oppositely arranged, and a brake drum 10 on the hoisting equipment is clamped between the two brake shoes.

The three main improvement points of the present embodiment are based on the above described brake, namely, the shaft holes 3 of the brake arm shafts 2 which are connected to the base connecting lugs 9 in a penetrating manner are made into vertical oblong holes (fig. 1); secondly, a connecting plate 4 (figure 2) is arranged at the position where the middle gap of the brake arm 1 is empty and the base 8, and the upper end of the connecting plate 4 is positioned by the penetration of the brake arm shaft 2; thirdly, the base connecting lug 9 is also provided with a pin shaft hole, and a pin shaft sensor 7 (figure 2) is connected in the hole in a penetrating way so as to position the lower end of the connecting plate 4.

As shown in fig. 9, the connecting plate 4 is a rectangular plate, and has an upper circular through hole and a lower circular through hole on its plate surface, the centers of the two circular through holes are located on the longitudinal center line of the connecting plate 4, and the longitudinal center line of the connecting plate and the longitudinal center line of the shaft hole 3 are on the same vertical plane, so as to ensure the detection accuracy of the braking friction force. In fig. 2, a connecting plate 4 is vertically arranged at a gap between the middle gap at the lower end of a brake arm 1 and two connecting lugs 9 on a base 8, a circular through hole at the upper part of the connecting plate is connected with a brake arm shaft 2 in a penetrating manner, a circular through hole at the lower part of the connecting plate is connected with a pin shaft sensor 7 in a penetrating manner, two ends of the pin shaft sensor 7 are connected with the connecting lugs 9 in a penetrating manner, and the arrangement distance of the two circular through holes on the connecting plate 4 is required to enable the axis of the static brake arm shaft 2 to be located at the long-direction central position of a shaft hole 3 so as to leave an ascending or descending movement space for the brake arm shaft 2. The end part of the pin shaft sensor is connected with a limit check ring 17.

As shown in fig. 10 and 11, a support plate 20 is fixed on the outer side surface of the engaging lug 9 positioned at the port of the shaft hole 3, a rectangular through hole is formed on the plate surface of the support plate 20, and the oblong shaft hole 3 on the engaging lug 9 is positioned in the range of the rectangular through hole. The lining is provided with a wear-resistant strip 19 on one side of the inner edge of the through hole of the support plate 20, namely the side of the brake arm shaft for braking and pressing, the width of the wear-resistant strip 19 is not more than the thickness of the connecting lug 9, the outer edge of the wear-resistant strip 19 is flush with the end surface of the connecting lug 9, and the length direction of the wear-resistant strip 19 is consistent with the length direction of the shaft hole 3. If no brace is provided, a wear strip 19 may be provided directly at the inner edge of one side of the shaft bore 3.

The brake arm shaft 2 is sleeved with a shaft sleeve 18, the axial length of the shaft sleeve 18 is not more than the width of the wear-resistant strip 19, and the shaft sleeve 18 is in sliding fit with the brake arm shaft 2. The wheel surface of the shaft sleeve 18 is abutted against the wear-resistant strip 19 of the support plate 20; without the support plate, the tread of the sleeve 19 rests against the inner edge of the shaft bore 3 on the coupling lug 9 or against a wear strip in the shaft bore 3. This changes the sliding fit of the brake arm shaft 2 in the shaft hole 3 to a rolling fit, thereby avoiding wear of the brake arm shaft 2 or the shaft hole 3.

When the brake is used for braking, the brake shoe 5 drives the brake arm 1 to generate micro displacement through the brake shoe shaft 6, the micro displacement of the brake arm 1 can be decomposed into a transverse micro displacement component and a vertical micro displacement component, the transverse micro displacement component of the brake arm 1 is absorbed and decomposed by a transverse long round hole in the rack, the vertical micro displacement component of the brake arm 1 drives the brake arm shaft 2 to pass through the shaft hole 3 of the base 8 without resistance, and the transverse micro displacement component is completely transferred to the pin shaft sensor 7 through the connecting plate 4, and the stress information is sent out in the form of electric signals or digital signals through the pin shaft sensor 7. This atress information can be regarded as the produced braking frictional force when the stopper brakes, with this braking frictional force and the radial product of brake drum, is this numerical value of this formula stopper braking torque when braking at every turn for a great deal of.

Example 2:

as shown in fig. 3 and 4, the present embodiment has substantially the same overall structure as that of embodiment 1, except that a shaft hole 3 of the brake arm 1 for passing through the brake arm shaft 2 is made as an elongated hole along the length direction of the brake arm, and a shaft hole holding circular hole of the brake arm shaft 2 is passed through the base engaging lug 9; the second is that the braking arm 1 is also provided with a pin shaft hole, the braking arm shaft 2 is connected in a lower circular through hole of the connecting plate 4 in a penetrating way, and the pin shaft sensor 7 is connected in the pin shaft hole of the braking arm 1 and an upper circular through hole of the connecting plate 4 in a penetrating way. The working process and the action principle of the embodiment are the same as those of the embodiment 1.

Example 3:

as shown in fig. 5 and 6, this embodiment is also a drum brake having substantially the same structure as that of embodiment 1, the lower end of the brake arm 1 is hinged to the coupling lug 9 of the base 8 in a conventional manner, and the upper end of the brake arm 1 is hinged to the frame 15 with a through coupling shaft and a transverse oblong hole in the same manner as in embodiment 1. The shaft hole 3 for passing through the brake shoe shaft 6 on the brake arm 1 is a vertical long round hole (figure 6), and the passing hole on the brake shoe 5 is a round hole. The brake arm 1 is provided with a pin shaft hole, a pin shaft sensor 7 is connected in the pin shaft hole in a penetrating way, a connecting plate 4 is arranged in a middle gap of the brake arm 1, and the structure of the connecting plate 4 is the same as that of the embodiment 1. The pin shaft sensor 7 is connected in the upper circular through hole of the connecting plate 4 in a penetrating manner, the brake shoe shaft 6 is connected in the lower circular through hole of the connecting plate 4 in a penetrating manner, and the arrangement distance of the two circular through holes on the connecting plate 4 is such that the axis of the brake shoe shaft 6 in a static state is located at the long-direction central position of the shaft hole 3.

Referring to fig. 10 and 11, the shaft hole 3 formed in the brake arm 1 is a vertical long circular hole, the support plate 20 is fixed on the outer side surface of the brake arm 1 located at the port of the shaft hole 3, a rectangular through hole is formed in the plate surface of the support plate 20, and the long circular shaft hole 3 on the connecting lug 9 is located within the range of the rectangular through hole. The side of the inner edge of the through hole of the support plate 20, namely the side of the brake shaft for braking and pressing, is lined with a wear-resistant strip 19, the width of the wear-resistant strip 19 is not more than the thickness of the brake arm 1, the outer edge of the wear-resistant strip 19 is flush with the end surface of the brake arm 1, and the length direction of the wear-resistant strip 19 is consistent with the length direction of the shaft hole 3. If no brace is provided, a wear strip 19 may be provided directly at the inner edge of one side of the shaft bore 3.

The brake shoe arm shaft 6 is sleeved with a shaft sleeve 18, the axial length of the shaft sleeve 18 is not more than the width of the wear strip 19, and the shaft sleeve 18 is in sliding fit with the brake shoe arm shaft 6. The wheel surface of the shaft sleeve 18 is abutted against the wear-resistant strip 19 of the support plate 20; without the support plate, the tread of the sleeve 19 rests against the inner edge of the shaft bore 3 on the coupling lug 9 or against a wear strip in the shaft bore 3. This changes the sliding fit of the brake shoe arm shaft 6 in the shaft bore 3 to a rolling fit, thereby avoiding wear of the brake arm shaft 2 or the shaft bore 3.

When the brake is braked, the brake shoe 5 causes the brake shoe shaft 6 to generate micro displacement, the micro displacement of the brake shoe shaft 6 can be decomposed into a transverse micro displacement component and a vertical micro displacement component, the transverse micro displacement component of the brake shoe shaft 6 passes through the brake arm 1 and is absorbed and decomposed by the transverse long round hole 16 on the frame 15, the vertical micro displacement component of the brake shoe shaft 6 passes through the shaft hole 3 of the brake arm 1 without resistance and is completely transferred to the pin shaft sensor 7 through the connecting plate 4, and the stress information is sent out in the form of electric signals or digital signals through the pin shaft sensor 7. This atress information can be regarded as the produced braking frictional force when the stopper brakes, with this braking frictional force and the radial product of brake drum, is this numerical value of this formula stopper braking torque when braking at every turn for a great deal of.

Example 4:

as shown in fig. 7 and 8, the present embodiment has the same overall structure as that of embodiment 3, except that the pin shaft hole for mounting the pin sensor is formed at the upper part of the brake shoe shaft hole of the brake arm 1, the brake shoe shaft 6 is inserted into the lower circular through hole of the connecting plate 4, and the pin sensor 7 is inserted into the pin shaft hole of the brake arm 1 and the upper circular through hole of the connecting plate 4. The working process and the action principle of the embodiment are the same as those of the embodiment 3.

Claims

1. A force measuring brake comprises a base and a brake arm hinged with the base through a brake arm shaft and is characterized in that a shaft hole used for penetrating the brake arm shaft on the base or the brake arm is a long round hole formed in the length direction of the brake arm, a pin shaft hole is further formed in the base or the brake arm, a pin shaft sensor is penetrated and connected in the pin shaft hole, a connecting plate is arranged in a gap in the lower portion of the brake arm, the pin shaft sensor and the brake arm shaft are respectively penetrated and connected in a round through hole in the connecting plate, and the distance between the two round through holes in the connecting plate is such that the axis of the static brake arm shaft is located in the middle position in the length direction of the shaft hole.

2. The force measuring brake of claim 1, wherein the connecting plate is configured to transmit braking friction force transmitted from the brake arm to the pin sensor, and the pin sensor is configured to convert the force information into an electrical signal and transmit the electrical signal to the outside.

3. The force measuring brake of claim 1, wherein the centers of the two circular perforations in the connecting plate are located on a longitudinal centerline of the connecting plate, the longitudinal centerline of the connecting plate being in the same vertical plane as the longitudinal centerline of the axle hole in the engaging lug or brake arm.

4. Force-measuring brake according to claim 1, 2 or 3, characterized in that a sleeve is connected to the brake arm shaft, the hub surface of which sleeve rests against the inner edge of the shaft bore on the coupling lug or the brake arm.

5. The force-measuring brake as claimed in claim 3, wherein a support plate with a through hole is fixed to the engaging lug or the brake arm at the end of the axle hole, a wear strip is lined on the inner edge of the through hole of the support plate, a shaft sleeve is connected to the brake arm axle, and the wheel surface of the shaft sleeve abuts against the wear strip.

6. A force measuring brake comprises a brake arm and a brake shoe hinged with the brake arm through a brake shoe shaft, and is characterized in that a shaft hole used for penetrating the brake shoe shaft on the brake arm is a long round hole formed in the length direction of the brake arm, a pin shaft hole is further formed in the brake arm, a pin shaft sensor is penetrated and connected in the pin shaft hole, a connecting plate is arranged in a gap of the brake arm, the pin shaft sensor and the brake shoe shaft are respectively penetrated and connected in a round through hole in the connecting plate, and the distance between the two round through holes in the connecting plate is such that the static axis of the brake shoe shaft is located in the middle position in the length direction of the shaft hole.

7. The force measuring brake of claim 6, wherein the connecting plate is configured to transmit the braking friction force transmitted through the brake shoe shaft to the pin sensor, and the pin sensor is configured to convert the force information into an electrical signal and transmit the electrical signal to the outside.

8. The force measuring brake of claim 6, wherein the centers of the two circular through holes on the connecting plate are located on the longitudinal centerline of the connecting plate, and the longitudinal centerline of the connecting plate is in the same vertical plane as the longitudinal centerline of the axle hole in the brake arm.

9. Force-measuring brake according to claim 6, 7 or 8, characterized in that a sleeve is attached to the brake shoe shaft, the hub surface of which sleeve rests against the inner edge of the shaft opening in the brake arm.

10. Force-measuring brake according to claim 6, 7 or 8, characterized in that a support plate with a through hole is fixed on the brake arm at the end of the axle hole, a wear strip is lined in the through hole of the support plate, a sleeve is connected to the brake shoe axle, and the wheel surface of the sleeve is attached to the wear strip.