CN116104887A

CN116104887A - Force-measuring brake

Info

Publication number: CN116104887A
Application number: CN202111329548.7A
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: 2023-05-12

Abstract

The invention 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 being connected with the brake arm shaft in a penetrating way is a long round hole formed along the length direction of the brake arm, a pin shaft hole is formed in the base, a pin shaft sensor is connected in the pin shaft hole in a penetrating way, 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 connected in a round through hole in the connecting plate in a penetrating way, and the arrangement distance of the two round through holes in the connecting plate is that the axis of the brake arm shaft in a static state is positioned at the center position in the length direction of the shaft hole. The invention can detect the braking friction force and braking moment of the brake in real time, and can send out fault early warning information in time to remind supervision and maintenance personnel to adopt countermeasures so as to ensure the use safety of hoisting equipment.

Description

Force-measuring brake

Technical Field

The invention relates to an axial brake, in particular to a force measuring brake capable of detecting braking friction force of the brake.

Background

The prior application CN108373089A discloses a brake torque true value detection sensor of a hub type brake and a brake torque true value detection method. The brake moment true value detection sensor comprises a substrate fixed on a brake base and a pulling and pressing sensor attached to the substrate; the base plate is divided into a suspended extension part with a suspended bottom edge and a fixed connection part fixedly connected with the brake base, and a transverse through hole is formed in the basic suspended extension part and used for penetrating through the brake arm hinge shaft so as to convert the vertical acting force generated when the brake arm brakes into the pulling and pressing acting force on the base plate through the brake arm hinge shaft; the pulling and pressing sensor is attached to the suspended extending part between the transverse via hole and the fixed connecting part on the base plate and used for detecting the pulling and pressing acting force applied to the base plate, and the braking moment true value of the drum brake can be obtained through calculation by combining the geometric dimension of the brake drum on the lifting equipment for installing the drum brake.

This patent gives a completely new way of detecting the brake torque of the brake in real time. However, the structure of such a brake torque true value detection sensor is somewhat complicated, and the mounting on the brake is also inconvenient.

Disclosure of Invention

The invention aims to provide a force measuring brake, which aims to solve the problems of complex structure and inconvenient installation of a brake braking moment true value detection sensor.

The invention is realized in the following way: the utility model provides a dynamometry stopper, includes base and the braking arm that articulates mutually through braking arm axle and base, be used for the shaft hole of cross-under braking arm axle to be along the oblong hole of opening of braking arm length on the base still open the round pin shaft hole in the cross-under has the round pin axle sensor the lower part gap of braking arm is provided with the connecting plate, the round pin axle sensor with braking arm axle each cross-under is in a circular perforation on the connecting plate, and the interval that sets up of two circular perforations on the connecting plate should make the axle center of braking arm axle under the static be located the long position in the middle of shaft hole.

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

Further, the centers of the two circular through holes on the connecting plate are positioned on the long-direction central line of the connecting plate, and the long-direction central line of the connecting plate and the long-direction central line of the shaft hole on the connecting lug are positioned on the same vertical plane.

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

Further, a support plate with a through hole is fixed on the connecting lug 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 to the brake arm shaft, and the tread of the shaft sleeve is abutted 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 moving clamping stagnation of the brake arm shaft is avoided being formed at the worn part due to abrasion of the inner edge of the shaft hole, the detection precision of braking friction force can be improved, and the service life is prolonged correspondingly.

According to the invention, the connecting plate connected with the brake arm shaft and the pin shaft sensor in a penetrating way is arranged, so that the brake arm can be stably connected with the base through the brake arm shaft, the connecting plate and the pin shaft sensor; the shaft hole of the base, which is connected with the brake arm shaft in a penetrating way, is formed into a vertical long round hole, so that when the brake arm shaft generates micro-expansion change along the vertical direction, the changed acting force is completely transmitted to the connecting plate and is transmitted to the pin shaft sensor through the connecting plate, and therefore, the pin shaft sensor can be utilized to detect the braking friction force generated by the brake shoe pressing the brake drum when the brake is braked, and the real-time detection of the braking friction force of the brake is realized. The present invention is applicable to drum brakes and disc arm brakes.

The invention can also be realized as follows: the utility model provides a dynamometry stopper, includes base and passes through the brake arm that the brake arm axle is articulated mutually with the base, be used for the shaft hole of cross-under brake arm axle to be along the long slotted hole of seting up of brake arm on the brake arm still open the round pin shaft hole in the cross-under has the round pin axle sensor in the round pin shaft hole be provided with the connecting plate in the lower part gap of brake arm, the round pin axle sensor with the brake arm axle is respectively cross-under in a circular perforation on the connecting plate, the interval that sets up of two circular perforations on the connecting plate should make the axle center of brake arm under the static be located the long position in the middle of shaft hole.

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

Further, a hub is connected to the brake arm shaft, and a wheel surface of the hub is abutted against an inner edge of the shaft hole on the brake arm.

Further, 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 to the brake arm shaft, and the wheel surface of the shaft sleeve is abutted against the wear-resistant strip.

The invention can also be realized as follows: the utility model provides a dynamometry stopper, includes brake arm and passes through brake shoe axle and the articulated brake shoe of brake arm mutually, be used for the long round hole of seting up along brake arm length direction in the shaft hole of cross-under brake shoe axle on the brake arm open there is the round pin shaft hole in the cross-under of round pin shaft hole have the round pin axle sensor be provided with the connecting plate in the gap in the brake arm, the round pin axle sensor with the brake shoe axle is respectively cross-under in a circular perforation on the connecting plate, the interval that sets up of two circular perforations on the connecting plate makes the axle center of brake shoe axle under static is located the long centering position in shaft hole.

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

Further, a shaft sleeve is connected to the brake shoe shaft, and the wheel surface of the shaft sleeve is abutted against the inner edge of the shaft hole on the brake arm.

Further, 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 to the brake shoe shaft, and the shaft sleeve is abutted 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 connected with the brake shoe shaft and the pin shaft sensor in a penetrating way; the shaft hole of the brake shoe shaft which is connected with the brake arm in a penetrating way is formed into a vertical long round hole, so that when the position of the brake shoe shaft is changed in the vertical direction, the changed acting force is transmitted to the connecting plate and is transmitted to the pin shaft sensor through the connecting plate, and therefore the pin shaft sensor can be utilized to detect the braking friction force generated by the brake shoe pressing the brake drum when the brake is braked by the brake, and the real-time detection of the braking friction force of the brake is realized.

The invention multiplies the detected braking friction force by the radius of the brake (namely the force arm of the braking friction force), and can detect the magnitude of the braking moment of the brake. When the detected braking moment of the brake cannot 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 countermeasures, faults and potential safety hazards of the brake are eliminated in time, and the use safety of hoisting equipment is ensured.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1.

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

Fig. 3 is a schematic structural diagram of embodiment 2.

Fig. 4 is a side view of fig. 2.

Fig. 5 is a schematic structural diagram of embodiment 3.

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

Fig. 7 is a schematic structural diagram of embodiment 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 schematic view of a partial structure of a support plate and wear strips attached to a shaft hole.

Fig. 11 is a schematic view of the mating structure of the bushing and wear strip.

In the figure: 1. the brake arm comprises a brake arm body, 2, a brake arm shaft body, 3, a shaft hole, 4, a connecting plate, 5, a brake shoe, 6, a brake shoe shaft body, 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, 14, a connecting shaft, 15, a frame, 16, a hole, 17, a limit retainer ring, 18, a shaft sleeve, 19, a wear-resisting strip, 20 and a support plate.

Detailed Description

Example 1:

as shown in fig. 1 and 2, a group 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 a brake arm shaft 2. The upper end of the brake arm 1 is hinged on a frame 15 through a connecting shaft 14, and a hole 16 penetrating through the connecting shaft 14 on the frame is a transverse oblong hole (figure 1) 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 general 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 arranged in opposite directions, and the brake drum 10 on the hoisting equipment is clamped between the two brake shoes.

The main improvement points of the embodiment based on the above-mentioned hollow brake are three, namely, the shaft hole 3 of the brake arm shaft 2 which is penetrated and connected on the base connecting lug 9 is made into a vertical oblong hole (figure 1); secondly, a connecting plate 4 (figure 2) is arranged at the space between the middle gap of the brake arm 1 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, a pin shaft hole is further formed in the base connecting lug 9, 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 body, an upper circular perforation and a lower circular perforation are formed on the plate surface of the connecting plate, the centers of the two circular perforations are positioned on the long central line of the connecting plate 4, and the long central line of the connecting plate and the long central line of the shaft hole 3 are positioned on the same vertical plane so as to ensure the detection precision of the braking friction force. In fig. 2, the connecting plate 4 is vertically disposed at a space between a middle gap at the lower end of the brake arm 1 and two connecting lugs 9 on the base 8, a circular perforation at the upper part of the connecting plate is connected with the brake arm shaft 2 in a penetrating manner, a circular perforation at the lower part of the connecting plate is connected with the 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 interval of the two circular perforations on the connecting plate 4 is required to be satisfied so that the axle center of the brake arm shaft 2 in a static state is located at a long-direction central position of the axle hole 3, so as to provide an uplink or downlink movement space for the brake arm shaft 2. And the end part of the pin shaft sensor is connected with a limiting check ring 17.

As shown in fig. 10 and 11, a support plate 20 is fixed on the outer side surface of the connecting lug 9 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 oblong shaft hole 3 on the connecting lug 9 is located in the range of the rectangular through hole. The wear-resistant strip 19 is arranged on one side of the inner edge of the through hole of the support plate 20, namely, one side of the brake arm shaft, which is pressed by braking, the width of the wear-resistant strip 19 is not larger than the thickness of the connecting lug 9, the outer edge of the wear-resistant strip 19 is flush with the end face of the connecting lug 9, and the long direction of the wear-resistant strip 19 is consistent with the long direction of the shaft hole 3. If no support plate is provided, a wear strip 19 can also 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 larger than the width of the wear-resisting strip 19, and the shaft sleeve 18 is in sliding fit with the brake arm shaft 2. The tread of the sleeve 18 rests on the wear strips 19 of the support plate 20; the wheel surface of the shaft sleeve 19 is abutted against the inner edge of the shaft hole 3 on the connecting lug 9 or the wear-resistant strip in the shaft hole 3 without the support plate. In this way, the sliding fit of the brake arm shaft 2 in the shaft hole 3 can be changed to a rolling fit, thereby avoiding wear of the brake arm shaft 2 or the shaft hole 3.

When the brake is braked, the brake shoe 8 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 slotted hole in the frame, 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, and the brake arm shaft 2 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 an electric signal or a digital signal through the pin shaft sensor 7. The stress information can be regarded as the braking friction force generated when the brake brakes, and the product of the braking friction force and the radius of the brake drum is the numerical value of the braking moment of the drum brake during each braking.

Example 2:

as shown in fig. 3 and 4, the whole structure of the present embodiment is basically the same as that of embodiment 1, except that the shaft hole 3 of the brake arm 1 for connecting the brake arm shaft 2 is formed as a long circular hole opened along the length direction of the brake arm, and the shaft hole of the base connecting lug 9 connecting the brake arm shaft 2 is formed as a retaining circular hole; secondly, the brake arm 1 is also provided with a pin shaft hole, the brake arm shaft 2 is connected in the lower circular perforation of the connecting plate 4 in a penetrating way, and the pin shaft sensor 7 is connected in the pin shaft hole of the brake arm 1 and the upper circular perforation of the connecting plate 4 in a penetrating way. The operation and operation principle of this embodiment are the same as those of 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, in which the lower end of the brake arm 1 is hinged to the connecting 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 through the connecting shaft 14 and the transverse oblong hole in the mode of embodiment 1. The shaft hole 3 of the brake arm 1 for penetrating and connecting the brake shoe shaft 6 is a vertical oblong hole (figure 6), and the penetrating and connecting hole of the brake shoe 8 is a circular hole. The brake arm 1 is provided with a pin hole, a pin shaft sensor 7 is connected in the pin 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 a penetrating way in the upper circular perforation of the connecting plate 4, the brake shoe shaft 6 is connected in a penetrating way in the lower circular perforation of the connecting plate 4, and the arrangement interval of the two circular perforations on the connecting plate 4 is such that the axle center of the brake shoe shaft 6 in a static state is positioned at the long-direction central position of the axle hole 3.

Referring to fig. 10 and 11, the shaft hole 3 formed in the brake arm 1 is a vertical oblong hole, a support plate 20 is fixed on the outer side surface of the brake arm 1 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 oblong shaft hole 3 on the connecting lug 9 is located in the range of the rectangular through hole. The wear-resistant strip 19 is arranged on one side of the inner edge of the through hole of the support plate 20, namely, one side of the brake shoe shaft, which is pressed by the brake shoe shaft, the width of the wear-resistant strip 19 is not larger than the thickness of the brake arm 1, the outer edge of the wear-resistant strip 19 is flush with the end face of the brake arm 1, and the long direction of the wear-resistant strip 19 is consistent with the long direction of the shaft hole 3. If no support plate is provided, a wear strip 19 can also 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 larger than the width of the wear-resisting strip 19, and the shaft sleeve 18 is in sliding fit with the brake shoe arm shaft 6. The tread of the sleeve 18 rests on the wear strips 19 of the support plate 20; the wheel surface of the shaft sleeve 19 is abutted against the inner edge of the shaft hole 3 on the connecting lug 9 or the wear-resistant strip in the shaft hole 3 without the support plate. In this way, the sliding fit of the brake arm shaft 6 in the shaft bore 3 can be changed 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 8 triggers 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 is absorbed and decomposed by a transverse slotted hole 16 on the frame 15 through the brake arm 1, the vertical micro displacement component of the brake shoe shaft 6 is unimpeded in the shaft hole 3 of the brake arm 1, 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 an electric signal or a digital signal through the pin shaft sensor 7. The stress information can be regarded as the braking friction force generated when the brake brakes, and the product of the braking friction force and the radius of the brake drum is the numerical value of the braking moment of the drum brake during each braking.

Example 4:

as shown in fig. 7 and 8, the overall structure of the present embodiment is substantially the same as that of embodiment 3, except that the pin hole for mounting the pin sensor is opened at the upper portion of the shoe shaft hole of the brake arm 1, the shoe shaft 6 is inserted into the lower circular hole of the connecting plate 4, and the pin sensor 7 is inserted into the pin hole of the brake arm 1 and the upper circular hole of the connecting plate 4. The operation and operation principle of this embodiment are the same as those of embodiment 3.

Claims

1. The utility model provides a dynamometry stopper, includes base and the braking arm that articulates mutually through braking arm axle and base, its characterized in that, be used for the long slotted hole of seting up along braking arm length direction of shaft hole that cross-connects the braking arm axle on the base still open the round pin shaft hole in the cross-under has the round pin axle sensor the lower part gap of braking arm is provided with the connecting plate, the round pin axle sensor with the braking arm axle is respectively cross-under in a circular perforation on the connecting plate, the setting interval of two circular perforations on the connecting plate should make the axle center of braking arm under the static state be located the long position in the middle of shaft hole.

2. The force measuring brake of claim 1, wherein the connection plate is configured to transmit a braking friction force transmitted through 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 web are located on a longitudinal centerline of the web, the longitudinal centerline of the web being on the same vertical plane as the longitudinal centerline of the shaft aperture in the tab.

4. A brake according to claim 1, 2 or 3, wherein a sleeve is attached to the brake arm shaft, the tread of the sleeve bearing against the inner edge of the shaft bore on the lug.

5. A force measuring brake according to claim 1, 2 or 3, wherein a support plate with a through hole is fixed to the connecting lug at the end of the shaft hole, a wear strip is lined in the inner edge of the through hole of the support plate, a shaft sleeve is connected to the brake arm shaft, and the tread of the shaft sleeve is abutted against the wear strip.

6. The utility model provides a dynamometry stopper, includes base and the brake arm that articulates with the base through the brake arm axle, its characterized in that, be used for the long round hole of seting up along the brake arm length direction of shaft hole that the cross-under brake arm on the brake arm still opens the round pin shaft hole the cross-under has the round pin axle sensor in the round pin shaft hole be provided with the connecting plate in the lower part gap of brake arm, the round pin axle sensor with the brake arm axle is respectively cross-under in a circular perforation on the connecting plate, the interval that sets up of two circular perforations on the connecting plate should make the axle center of the brake arm under the static is located the long direction intermediate position in shaft hole.

7. The force measuring brake of claim 6, wherein the connection plate is configured to transmit a braking friction force transmitted through 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.

8. The brake of claim 6, wherein the centers of the two circular perforations in the web are located on a longitudinal centerline of the web, the longitudinal centerline of the web being on the same vertical plane as the longitudinal centerline of the shaft aperture in the brake arm.

9. A brake according to claim 6, 7 or 8, wherein a bushing is attached to the brake arm shaft, the tread of the bushing bearing against the inner edge of the shaft bore on the brake arm.

10. The force measuring brake of claim 6, 7 or 8, wherein a support plate with a through hole is fixed on the brake arm at the end of the shaft hole, a wear-resistant strip is lined on 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 abutted against the wear-resistant strip.

11. The utility model provides a dynamometry stopper, includes brake arm and passes through brake shoe axle and the articulated brake shoe of brake arm, its characterized in that, be used for the cross-under brake shoe axle's shaft hole be along the long slotted hole of seting up of brake arm on the brake arm still open the round pin shaft hole in the cross-under of round pin shaft hole have the round pin axle sensor be provided with the connecting plate in the gap of brake arm, the round pin axle sensor with the brake shoe axle is respectively cross-under in a circular perforation on the connecting plate, the setting interval of two circular perforations on the connecting plate should make the static down the axle center of brake shoe axle be located the long of shaft hole is put in the middle of position.

12. The force measuring brake of claim 11, wherein the connecting plate is configured to transmit a 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.

13. The brake of claim 11, wherein the centers of the two circular perforations in the web are located on a longitudinal centerline of the web, the longitudinal centerline of the web being on the same vertical plane as the longitudinal centerline of the shaft aperture in the brake arm.

14. A brake according to claim 11, 12 or 13, wherein a bushing is attached to the brake shoe shaft, the tread of the bushing bearing against the inner edge of the shaft bore on the brake arm.

15. The force measuring brake of claim 11, 12 or 13, wherein a support plate with a through hole is fixed on the brake arm at the end of the shaft hole, a wear strip is lined at the inner edge of the through hole of the support plate, a shaft sleeve is connected to the brake shoe shaft, and the wheel surface of the shaft sleeve is abutted against the wear strip.