A composite force sensing unit and elevator brake force detector and testing method thereof

Abstract

The application belongs to the field of elevator maintenance detection, and in particular to a composite force-sensitive sensing unit and elevator brake force detector, which is used to solve the problems of unstable assembly, low detection accuracy and lack of emergency protection of the existing elevator brake force detection, and the detector comprises a traction machine, a main shaft, a clamping frame, a mounting plate, a connecting shaft, a connecting disc, a torsion sensor, a drive shaft, a paddle, a proximity switch and a driving part, the clamping frame cooperates with a top screw to realize fixation with the traction machine, the connecting disc is locked with the main shaft through a fixing bolt, the torsion sensor is connected in series between the connecting shaft and the drive shaft, the paddle cooperates with the proximity switch and a baffle to realize rotation monitoring, and an emergency brake structure composed of a pressing ring, a brake pad, a sliding frame and a brake disc is arranged on the mounting plate, the detector is mainly used for on-site detection of the brake force of the elevator brake, is firmly assembled, can realize multi-dimensional brake force determination, has the emergency rotation stopping protection function, and improves the detection accuracy and operation safety.

Description

Technical Field

[0001] This invention relates to the field of elevator maintenance and testing technology, and in particular to a composite force-sensitive sensing unit and an elevator brake force tester and its testing method. Background Technology

[0002] Elevator brakes are core components that ensure the safe operation of elevators. During routine maintenance, the braking force of the brakes needs to be tested regularly to determine whether the braking performance meets the standards. At present, in elevator maintenance operations, braking force testing is mostly completed with the help of simple tooling and manual observation. The connection between the tooling and the traction machine spindle relies on conventional clips or bolts for fixing, and the overall positioning relies on manual control. There is no special auxiliary fixing structure to assist in assembly.

[0003] Existing testing methods are prone to issues such as loose assembly and misalignment. The torque transmission during testing is unstable, affecting data accuracy. Furthermore, the testing process relies on a single sensor to determine the rotation status, which can easily lead to misjudgments. In the event of a sudden brake failure, there is no corresponding emergency anti-rotation structure, posing safety hazards during the testing process. Moreover, the overall testing accuracy and operational safety are insufficient to meet maintenance requirements.

[0004] To address the aforementioned problems, this invention proposes a composite force-sensitive sensing unit and an elevator brake braking force detector and its testing method. Summary of the Invention

[0005] This invention provides a composite force-sensitive sensing unit and an elevator brake braking force detector and its testing method, which overcomes the shortcomings of the prior art.

[0006] This invention provides the following technical solution: A composite force-sensitive sensing unit and an elevator brake braking force detector includes a traction machine, a through main shaft rotatably connected between the two sides of the traction machine, and two brackets disposed on one side of the traction machine. A mounting plate is fixed between the two brackets by bolts. A through connecting shaft is rotatably connected to one side of the mounting plate. A connecting plate is welded to the end of the connecting shaft near the traction machine for connection with the main shaft. A torque sensor is fixedly installed at one end of the connecting shaft away from the traction machine, and a drive shaft is fixedly installed at the other end of the torque sensor. Multiple paddles are fixed around the circumference of the connecting shaft, and a proximity switch is fixedly connected to one side of the mounting plate. The paddles and the proximity switch are used in conjunction. The drive unit, located on one side of one of the card holders, is used to apply torque to the drive shaft.

[0007] Furthermore, the drive unit includes an electric push rod and a drive disk. The drive disk is fixed to one end of the drive shaft. A winding groove is provided around the drive disk. A steel wire rope is fixedly connected in the winding groove. One end of the steel wire rope is fixed in the winding groove. The electric push rod is fixed to one side of one of the brackets. The steel wire rope passes around the winding groove and is fixedly connected to the output end of the electric push rod.

[0008] Furthermore, one side of the connecting plate is provided with multiple through holes, each of which is fitted with a fixing bolt, which is threadedly connected to the main shaft.

[0009] Furthermore, both sides of the card holder are threaded with through-hole set screws, which abut against the traction machine.

[0010] Furthermore, a plurality of baffles are fixedly connected to the side of the mounting plate near the paddle, and the baffles are arranged in a ring. An impact head is fixedly connected to one end of each paddle, and the impact head works in conjunction with the baffles.

[0011] Furthermore, two symmetrically arranged mounting shafts are fixedly connected to the side of the mounting plate away from the drive disc. An arc-shaped pressure ring is rotatably connected to the circumference of each mounting shaft. A brake disc is fixedly connected to the circumference of the connecting shaft. The brake disc is located between the two pressure rings. A brake pad is fixedly connected to the side of each pressure ring near the brake disc.

[0012] Furthermore, tension springs are fixedly connected between the side of the pressure ring and the mounting plate. A through slide is provided on one side of the mounting plate, and a through sliding frame is slidably connected in the slide. The sliding frame is I-shaped, and pressure plates are fixedly connected to the bottom of both ends. An inclined surface is provided on one side of the bottom of the pressure plate, and the two inclined surfaces contact the top of the two pressure rings respectively. A spring is fixedly installed between the bottom of the slide and the bottom of the sliding frame.

[0013] Furthermore, a control box is fixedly connected to one side of one of the card holders, and a controller and an alarm are fixedly installed inside the control box. The proximity switch, torque sensor and alarm are all electrically connected to the controller.

[0014] This invention also proposes a testing method for a composite force-sensitive sensing unit and an elevator brake braking force detector, comprising the following steps: S1: Connect the detector to the traction machine. When connecting, fix the connecting plate to the main shaft with the fixing bolt. At this time, the two ends of the clamp are located on both sides of the traction machine. Rotate the set screw, and the set screw will abut against the outer shell of the traction machine to keep the detector stable. S2: During testing, brake the brake disc of the traction machine, start the electric push rod, and the electric push rod pulls the drive disc through the wire rope. The drive disc transmits the force to the main shaft through the torque sensor. You can determine whether the braking force is qualified by observing whether the drive disc rotates. S3: In case of an accident during the testing process, the main shaft continues to rotate. The sliding frame can be pressed down, and the sliding frame drives the pressure plate to move downward. The pressure plate pushes the two pressure rings and the brake pads to resist the brake disc, thereby inhibiting the rotation of the main shaft and improving safety. S4: During the testing process, a proximity switch can be used to detect whether the paddle rotates with the connecting shaft, thereby determining whether the main shaft is rotating. When the paddle rotates, it also drives the impact head to rotate. When the impact head passes one of the baffles, it collides with the other baffle and makes a sound to alert the staff. By judging the braking force from multiple angles, the testing is more accurate.

[0015] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the invention.

[0016] In this invention, the use of a clamp, set screw, connecting plate, and fixing bolt together enables the detector to be quickly and securely assembled with the traction machine. The set screw tightens the traction machine housing to eliminate assembly gaps, and the fixing bolt locks the main shaft and connecting plate to ensure torque transmission without loosening. The entire assembly operation is simple and does not require modification of the original structure of the traction machine, greatly improving the installation efficiency and adaptability of the detector, and ensuring that the whole machine does not shift or shake during the testing process.

[0017] In this invention, the combined use of a torque sensor, a proximity switch, a lever, an impact head, and a baffle plate enables multi-dimensional and accurate detection of braking force. The torque sensor collects torque data in real time to quantify the magnitude of the braking force, the proximity switch captures the main shaft rotation signal, and the impact head hits the baffle plate to emit an audible alert. The three detection mechanisms corroborate each other, effectively avoiding the error of a single detection and significantly improving the accuracy of braking force determination. In this invention, an emergency braking protection structure is constructed by using a pressure ring, brake pads, a sliding frame, a pressure plate, and a brake disc in combination. When a brake failure occurs during testing, pressing the sliding frame will cause the brake pads to adhere to the brake disc, and the connecting shaft and the main shaft will be quickly locked by friction, preventing the main shaft from rotating continuously and eliminating safety hazards. Moreover, it can automatically reset after being released, without affecting subsequent testing operations, thus improving the safety of testing operations. Attached Figure Description

[0018] Figure 1 A three-dimensional structural schematic diagram of a composite force-sensitive sensing unit and an elevator brake braking force detector provided in an embodiment of the present invention; Figure 2 This is a partial structural schematic diagram of a composite force-sensitive sensing unit and an elevator brake braking force detector provided in an embodiment of the present invention. Figure 3 A schematic cross-sectional view of the drive disc structure of a composite force-sensitive sensing unit and an elevator brake braking force detector provided in an embodiment of the present invention. Figure 4This invention provides a composite force-sensitive sensing unit and an elevator brake braking force detector. Figure 3 Enlarged structural diagram of section A in the middle; Figure 5 This is a schematic diagram of the pressure ring mounting structure of a composite force-sensitive sensing unit and an elevator brake braking force detector provided in an embodiment of the present invention.

[0019] Figure label: 1. Traction machine; 2. Chassis; 3. Mounting plate; 4. Set screw; 5. Connecting disc; 6. Drive disc; 7. Through hole; 8. Fixing bolt; 9. Main shaft; 11. Winding groove; 12. Wire rope; 13. Electric actuator; 14. Control box; 15. Connecting shaft; 16. Torque sensor; 17. Drive shaft; 18. Paddle; 19. Impact head; 20. Baffle; 21. Proximity switch; 22. Slide rail; 23. Sliding frame; 24. Spring; 25. Pressure plate; 26. Inclined surface; 27. Mounting shaft; 28. Pressure ring; 29. ​​Brake pad; 30. Tension spring; 31. Brake disc. Detailed Implementation

[0020] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0021] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the devices are connected to each other and their relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of the present invention, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0022] References to "one embodiment" or "some embodiments" as used in this specification mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the invention. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless otherwise specifically emphasized.

[0023] Example 1 Reference Figures 1-5 A composite force-sensitive sensing unit and an elevator brake force detector are disclosed. The unit includes a traction machine 1 with a through-shaft 9 rotatably connected between the two sides of the traction machine 1. The unit also includes a bracket 2, which is placed to conform to the outer contour of the traction machine 1. The two brackets 2 are fastened to a mounting plate 3 by bolts, so that the mounting plate 3 and the traction machine 1 maintain a relatively fixed positional relationship. A through-shaft screw 4 is threaded to both sides of the bracket 2. The screw 4 is screwed into the side wall of the bracket 2 until the end of the screw 4 is in close contact with the outer shell of the traction machine 1. The tightening action of the screws 4 on both sides ensures that the detector does not shift or shake during the detection process, and maintains the stability of the assembly state.

[0024] The mounting plate 3 is rotatably connected to the connecting shaft 15. The end of the connecting shaft 15 closest to the traction machine 1 is welded with a connecting plate 5. The connecting plate 5 is correspondingly connected to the main shaft 9 of the traction machine 1. Multiple through holes 7 are opened on one side of the connecting plate 5. A fixing bolt 8 is inserted into each through hole 7. After passing through the through hole 7, the fixing bolt 8 is threaded to the end of the main shaft 9, which firmly fixes the connecting plate 5 to the main shaft 9. This ensures that the main shaft 9 can drive the connecting shaft 15 to rotate synchronously when it rotates, so as to achieve complete torque transmission and avoid slippage or loosening during the transmission process.

[0025] A torque sensor 16 is fixedly installed at one end of the connecting shaft 15 away from the traction machine 1, and a drive shaft 17 is fixedly installed at the other end of the torque sensor 16. The drive shaft 17, the torque sensor 16, and the connecting shaft 15 are on the same axis to ensure that the torque transmission path is straight and to reduce force loss and detection error. Multiple levers 18 are fixed to the outer circumference of the connecting shaft 15. The levers 18 are evenly distributed along the circumference of the connecting shaft 15. A proximity switch 21 is fixedly connected to one side of the mounting plate 3. The detection end of the proximity switch 21 is set towards the levers 18. When the levers 18 rotate with the connecting shaft 15, they can pass through the detection area of ​​the proximity switch 21, thereby forming a cooperative detection structure. Multiple baffles 20 are fixed to the side of the mounting plate 3 near the levers 18. The multiple baffles 20 are arranged in a ring on the rotation path of the levers 18. An impact head 19 is fixed to one end of each lever 18. When the impact head 19 rotates with the lever 18, it can pass over a single baffle 20 and collide with an adjacent baffle 20. A sound is generated during the collision, which serves as a warning on site.

[0026] One of the card holders 2 has a drive unit on one side. The drive unit applies stable torque to the drive shaft 17. The drive unit consists of an electric push rod 13 and a drive disk 6. The drive disk 6 is fixed to the end of the drive shaft 17 away from the torque sensor 16. A winding groove 11 is formed around the drive disk 6. One end of the wire rope 12 is fixed inside the winding groove 11. After the wire rope 12 is wound along the winding groove 11, the other end is fixedly connected to the output end of the electric push rod 13. The electric push rod 13 is fixed to the side wall of the corresponding card holder 2. Relying on the extension and retraction of the electric push rod 13, the drive disk 6 is pulled to rotate by the wire rope 12, thereby transmitting torque sequentially to the drive shaft 17, the torque sensor 16, the connecting shaft 15, and the main shaft 9. When the electric push rod 13 is activated, it pulls the drive disk 6 through the wire rope 12. The drive disk 6 transmits the force to the main shaft 9 after passing through the torque sensor 16. By observing whether the drive disk 6 rotates, it can be determined whether the braking force is qualified.

[0027] Example 2 Reference Figures 1-5Based on Example 1, an improved composite force-sensitive sensing unit and elevator brake force detector are described. Two symmetrically arranged mounting shafts 27 are fixed to the side of the mounting plate 3 away from the drive disc 6. Each mounting shaft 27 is rotatably connected to an arc-shaped pressure ring 28. The pressure ring 28 can deflect around the mounting shaft 27. A brake disc 31 is fixed to the circumference of the connecting shaft 15, located within the gap between the two pressure rings 28. Brake pads 29 are fixed to the side of each pressure ring 28 near the brake disc 31, corresponding to the sidewall of the brake disc 31. Tension springs 30 are fixed between the side of the pressure rings 28 and the mounting plate 3. Under normal conditions, the tension springs 30 pull the pressure rings 28, keeping the brake pads 29 separated from the brake disc 31, without affecting the normal rotation of the connecting shaft 15. A through-slide track 22 is provided on one side of the mounting plate 3. A through-slide frame 23 is slidably connected in the slide track 22. The slide frame 23 adopts an I-shaped structure. Pressure plates 25 are fixed at the bottom of both ends of the slide frame 23. An inclined surface 26 is provided on one side of the bottom of each pressure plate 25. The two inclined surfaces 26 contact the tops of the two pressure rings 28 respectively. A spring 24 is fixed between the bottom of the slide track 22 and the bottom of the slide frame 23. Under normal conditions, the spring 24 supports the slide frame 23, keeping the pressure plate 25 in a high position and not applying pressure to the pressure rings 28. When the main shaft 9 continues to rotate, the slide frame 23 can be pressed down. The slide frame 23 drives the pressure plate 25 to move downward. The pressure plate 25 pushes the two pressure rings 28 and the brake pad 29 against the brake disc 31 through the inclined surface 26, thereby inhibiting the rotation of the main shaft 9 and improving safety.

[0028] One of the card holders 2 has a control box 14 fixed on one side. The controller and alarm are fixedly installed inside the control box 14. The proximity switch 21, torque sensor 16, electric push rod 13 and alarm are all electrically connected to the controller through wires. The torque sensor 16 collects torque data in real time during the detection process and transmits it to the controller. The proximity switch 21 synchronously feeds back the rotation signal to the controller. The controller analyzes and processes the received signal. When the detection data is abnormal, the controller triggers the alarm to issue a warning. The controller uses an industrial-grade microcontroller to collect torque data from the torque sensor and rotation signals from the proximity switch in real time. When the torque exceeds the threshold or abnormal rotation of the spindle is detected, the controller immediately cuts off the power to the electric actuator and drives the alarm to issue an audible and visual warning, thus achieving closed-loop automatic control.

[0029] A test method for a composite force-sensitive sensing unit and an elevator brake force detector, comprising the following steps: S1: Connect the detector to the traction machine 1. When connecting, fix the connecting plate 5 and the main shaft 9 with the fixing bolt 8. At this time, the two ends of the bracket 2 are located on both sides of the traction machine 1. Rotate the set screw 4. The set screw 4 abuts against the outer shell of the traction machine 1 to keep the detector stable. S2: During testing, brake the brake disc of the traction machine, start the electric push rod 13, the electric push rod 13 pulls the drive disc 6 through the wire rope 12, the drive disc 6 transmits the force to the main shaft 9 through the torque sensor 16, and the braking force can be determined by observing whether the drive disc 6 rotates. S3: In case of an accident during the testing process, the main shaft 9 continues to rotate, which can press down the sliding frame 23. The sliding frame 23 drives the pressure plate 25 to move downward. The pressure plate 25 pushes the two pressure rings 28 and the brake pads 29 to abut against the brake disc 31, thereby suppressing the rotation of the main shaft 9 and improving safety. S4: During the testing process, the proximity switch 21 can be used to detect whether the paddle 18 rotates with the connecting shaft 15, thereby determining whether the main shaft 9 rotates. When the paddle 18 rotates, it also drives the impact head 19 to rotate. When the impact head 19 passes one of the baffles 20, it collides with the other baffle 20 and makes a sound to remind the staff. By judging the braking force from multiple angles, the testing is more accurate.

[0030] However, as is well known to those skilled in the art, the working principles and wiring methods of the proximity switch 21, torque sensor 16, electric actuator 13, alarm and controller are commonplace and are all conventional means or common knowledge, so they will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0031] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. In the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A composite force-sensitive sensing unit and an elevator brake force detector, comprising: The traction machine (1) has a through main shaft (9) rotatably connected between its two sides. The traction machine (1) is characterized by including two brackets (2) set on one side of the traction machine (1). A mounting plate (3) is fixed between the two brackets (2) by bolts. A through connecting shaft (15) is rotatably connected to one side of the mounting plate (3). A connecting plate (5) is welded to the end of the connecting shaft (15) near the traction machine (1) for connecting with the main shaft (9). A torque sensor (16) is fixedly installed at one end of the connecting shaft (15) away from the traction machine (1), and a drive shaft (17) is fixedly installed at the other end of the torque sensor (16). Multiple paddles (18) are fixedly fixed around the circumference of the connecting shaft (15). A proximity switch (21) is fixedly connected to one side of the mounting plate (3). The paddles (18) and the proximity switch (21) are used together. The drive unit is located on one side of one of the card holders (2) for applying torque to the drive shaft (17).

2. The composite force-sensitive sensing unit and elevator brake force detector according to claim 1, characterized in that, The drive unit includes an electric push rod (13) and a drive disk (6). The drive disk (6) is fixed to one end of the drive shaft (17). A winding groove (11) is provided around the drive disk (6). A wire rope (12) is fixedly connected in the winding groove (11). One end of the wire rope (12) is fixed in the winding groove (11). The electric push rod (13) is fixed to one side of one of the card holders (2). The wire rope (12) passes around the winding groove (11) and is fixedly connected to the output end of the electric push rod (13).

3. The composite force-sensitive sensing unit and elevator brake force detector according to claim 1, characterized in that, The connecting plate (5) has multiple through holes (7) on one side, and each through hole (7) is fitted with a fixing bolt (8), which is threaded to the main shaft (9).

4. The composite force-sensitive sensing unit and elevator brake force detector according to claim 1, characterized in that, Both sides of the card holder (2) are threaded with through-hole set screws (4), and the set screws (4) are in contact with the traction machine (1).

5. The composite force-sensitive sensing unit and elevator brake force detector according to claim 1, characterized in that, The mounting plate (3) has multiple baffles (20) fixedly connected to one side of the lever (18). The baffles (20) are arranged in a ring. An impact head (19) is fixedly connected to one end of each lever (18). The impact head (19) and the baffles (20) are used together.

6. The composite force-sensitive sensing unit and elevator brake force detector according to claim 1, characterized in that, The mounting plate (3) is fixedly connected to two symmetrically arranged mounting shafts (27) on the side away from the drive disc (6). The circumference of each mounting shaft (27) is rotatably connected to an arc-shaped pressure ring (28). The circumference of the connecting shaft (15) is fixedly connected to a brake disc (31). The brake disc (31) is located between the two pressure rings (28). The side of each pressure ring (28) near the brake disc (31) is fixedly connected to a brake pad (29).

7. The composite force-sensitive sensing unit and elevator brake force detector according to claim 6, characterized in that, A tension spring (30) is fixedly connected between the side of the pressure ring (28) and the mounting plate (3). A through slide (22) is provided on one side of the mounting plate (3). A through sliding frame (23) is slidably connected in the slide (22). The sliding frame (23) is I-shaped and pressure plates (25) are fixedly connected to the bottom of both ends. An inclined surface (26) is provided on one side of the bottom of the pressure plate (25). The two inclined surfaces (26) contact the top of the two pressure rings (28) respectively. A spring (24) is fixedly installed between the bottom of the slide (22) and the bottom of the sliding frame (23).

8. The composite force-sensitive sensing unit and elevator brake force detector according to claim 1, characterized in that, One of the card holders (2) is fixedly connected to a control box (14) on one side. The control box (14) contains a controller and an alarm. The proximity switch (21), torque sensor (16) and alarm are all electrically connected to the controller.

9. The test method for a composite force-sensitive sensing unit and an elevator brake braking force detector according to any one of claims 1-8, characterized in that, Includes the following steps: S1: Connect the detector to the traction machine (1). When connecting, fix the connecting plate (5) and the main shaft (9) with the fixing bolt (8). At this time, the two ends of the bracket (2) are located on both sides of the traction machine (1). Rotate the set screw (4). The set screw (4) abuts against the outer shell of the traction machine (1) to keep the detector stable. S2: During the test, the brake disc of the traction machine is stopped, and the electric push rod (13) is started. The electric push rod (13) pulls the drive disc (6) through the wire rope (12). The drive disc (6) transmits the force to the main shaft (9) through the torque sensor (16). The braking force can be determined by observing whether the drive disc (6) rotates. S3: In case of an accident during the testing process, the main shaft (9) continues to rotate, which can press down the sliding frame (23). The sliding frame (23) drives the pressure plate (25) to move downward. The pressure plate (25) pushes the two pressure rings (28) and the brake pads (29) to abut against the brake disc (31), thereby suppressing the rotation of the main shaft (9) and improving safety. S4: During the testing process, the proximity switch (21) can be used to detect whether the paddle (18) rotates with the connecting shaft (15), thereby determining whether the main shaft (9) rotates. When the paddle (18) rotates, it also drives the impact head (19) to rotate. When the impact head (19) passes one of the baffles (20), it collides with the other baffle (20) and makes a sound to remind the staff. By judging the braking force from multiple angles, the testing is more accurate.

Images