Elevator brake fatigue test bench

Abstract

The invention discloses an elevator brake fatigue test bench, the fatigue test bench is used for carrying out fatigue and durability test on a brake lining of an electromagnetic band-type brake, the fatigue test bench comprises a pedestal, a friction assembly and a brake lining intermittent pushing assembly, a short sliding groove and two wing plates are arranged in the center of the top end face of the pedestal, and a friction assembly and a brake lining intermittent pushing assembly are arranged on the pedestal. The friction assembly comprises a rack, a friction roller piece, a gear assembly and a first motor, the friction roller piece is rotationally installed on the inner side of the rack through a shaft rod, the gear assembly is arranged on the rear side of the friction roller piece and comprises a gear A, a gear B and a gear C which are installed on one side of the wing plate, and the gear A, the gear B and the gear C are arranged in an engaged mode; the gear A is sleeved on the shaft rod and is coaxially connected with the friction roller piece; and the gear C can be connected with a motor on the rear side of the rack. The test bench can simulate the fatigue condition of the brake lining under the intermittent brake condition of the elevator.

Description

Technical Field

[0001] The invention relates to the field of elevator brake fatigue simulation test, in particular to an elevator brake fatigue test bench. Background Art

[0002] The electromagnetic holding brake is a key component in the elevator safety device. Its function is to quickly brake and maintain the elevator's position when an accident occurs to ensure the safety of passengers and objects. The principle of the electromagnetic holding brake is to control the contact and separation between the brake shoe (brake shoe) and the brake wheel through the attraction and release of the electromagnet, thereby achieving braking of the motor shaft.

[0003] As attached Figure 7 As shown in the figure, the conventional electromagnetic holding brake mainly consists of two parts: the brake electromagnet and the brake shoe brake. The brake electromagnet consists of three parts: the iron core, the armature and the coil, while the brake shoe brake includes the brake wheel (also called the brake wheel), the brake lining, the spring, the brake detection switch and other components, wherein the brake wheel and the motor are mounted on the same shaft. The following is the working principle of the electromagnetic holding brake: When the motor is powered on, the electromagnetic holding brake coil is also powered at the same time. Under the action of electromagnetic attraction, the armature is attracted, overcoming the tension of the spring, so that the brake lining of the brake is separated from the brake wheel. In this way, the motor can operate normally; when the brake detection switch is disconnected, the motor loses power, and the electromagnetic holding brake coil also loses power. At this time, the armature is separated from the iron core under the action of the spring tension, and the brake lining of the brake tightly holds the brake wheel, thereby quickly braking the motor and stopping it from rotating.

[0004] The operation and stopping principle of the electromagnetic holding brake applied to the elevator is as follows: when the elevator is in a stationary state, no current flows through the coils of the traction motor and the electromagnetic elevator brake. At this time, there is no attraction between the electromagnet cores, and the brake lining holds the brake wheel tightly under the pressure of the brake spring to ensure that the motor does not rotate; when the traction motor is powered on and rotates, the coil in the brake electromagnet is also powered on, and the electromagnet core is quickly magnetized and attracted, driving the brake arm to apply force to its brake spring, and the brake lining opens and completely separates from the brake wheel, allowing the elevator to operate; when the elevator car arrives at the required stop, the traction motor loses power, and the coil in the brake electromagnet also loses power at the same time, the magnetic force in the electromagnet core disappears quickly, and the iron core is reset through the brake arm under the action of the brake spring, so that the brake lining holds the brake wheel again, and the elevator stops working.

[0005] In general, the principle of most elevator holding brakes is based on friction braking, that is, the braking force is generated by the friction of the brake lining of the brake to stop the elevator quickly.

[0006] Since the brake lining of the electromagnetic brake will experience wear and fatigue problems under multiple braking conditions, the braking performance will continue to decrease with the number of braking times. In order to simulate this condition, simulation or test benches for dealing with elevator brake fatigue have appeared on the market.

[0007] 1) As disclosed in announcement number CN118758582A, an elevator brake fatigue test bench includes a hydraulic transfer case, a brake assembly and a control assembly. Both ends of the hydraulic transfer case are provided with output shafts, one end of which is drivingly connected to a first reducer, and the other end of which is drivingly connected to a second reducer. The output end of the first reducer is drivingly connected to the brake. The brake assembly is arranged above the brake, and the control assembly is arranged outside the brake. During operation, multiple assemblies are driven by a single power source without the need for an additional actuating device.

[0008] 2) As disclosed in announcement number CN110749428A, a reliability test bench for hoist brakes simulating actual working conditions and its test method are applied to the field of hoist brakes. The device includes: a frequency converter, a servo motor, an equivalent mass part, a brake disc structure, a brake arm, a photoelectric speed sensor, a temperature sensor, and a hydraulic pump station. The frequency converter is installed on the far left of the test bench, and the servo motor is installed on the right side of the frequency converter. The frequency converter and the servo motor are connected by wires.

[0009] Although Document 2 is for testing and inspection in the field of hoist brakes, it can simulate real working conditions and can simulate the braking of brake shoes under different initial braking speeds, braking pressures, brake shoe thicknesses, friction pair contact areas, and brake clearances of hoist brakes. However, Document 2 cannot simulate the strength of brake shoes (brake linings) under different conditions, such as high temperature conditions (long-term braking) and low temperature conditions (winter or cold regions), resulting in different test data for brake shoes under different conditions, affecting the comprehensiveness of the test; at the same time, Document 2 cannot simulate the test conditions under intermittent braking.

[0010] Based on the above background, the present invention proposes an elevator brake fatigue test bench, which can utilize a brake shoe intermittent pushing assembly to intermittently push the brake shoe / brake shoe of a holding brake, thereby simulating the fatigue working condition of the brake shoe under intermittent braking of the elevator. In addition, it can deliver high and low temperatures through an external cold source or heat source to simulate the wear and fatigue effects of high temperature / long-term braking / low temperature on the brake shoe, thereby further improving the detection range. Summary of the invention

[0011] The purpose of the present invention is to provide an elevator brake fatigue test bench, which can use a brake lining intermittent pushing component to intermittently push the brake lining / brake lining of a holding brake, so as to simulate the fatigue condition of the brake lining under intermittent braking of the elevator.

[0012] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an elevator brake fatigue test bench, the fatigue test bench is used to perform fatigue and durability tests on the brake lining of the electromagnetic brake, the fatigue test bench comprises a pedestal, a friction assembly and a brake lining intermittent pushing assembly, wherein the side cross-section of the pedestal is in a convex shape, a short slide groove and two wing plates are provided at the center of the top surface of the pedestal, and the friction assembly and the brake lining intermittent pushing assembly are arranged on the pedestal; the friction assembly comprises a pedestal, a friction roller, a gear assembly and a first motor, wherein the friction roller is rotatably installed on the inner side of the pedestal through an axle, a gear assembly is arranged on the rear side of the friction roller, and the gear assembly comprises gear A, gear B and gear C installed on one side of the wing plate, wherein gear A, gear B and gear C are meshed, gear A is sleeved on the axle and is coaxially connected to the friction roller, and gear C can be connected to the motor on the rear side of the pedestal.

[0013] Preferably, the friction roller member includes a side roller frame A, a side roller frame B and a friction ring, wherein the friction ring is located between the side roller frame A and the side roller frame B, and the side roller frame A, the friction ring and the side roller frame B are connected by adjustable bolts.

[0014] Preferably, the side roller frame A, the friction ring and the side roller frame B are all provided with friction surfaces for rubbing the brake lining on the outside, and the friction ring is provided with an anti-dropout bayonet on the inside, through which the friction ring can be installed between the side roller frame A and the side roller frame B. The friction ring is easy to load and unload, and the thickness of the entire friction roller can be adjusted by adding friction rings of different thicknesses and installing them between the side roller frame A and the side roller frame B through the bayonet, which can meet the fatigue test of brake linings of different thicknesses.

[0015] Preferably, the brake lining intermittent pushing assembly is used to clamp the brake lining and intermittently contact and rub against the friction roller. The brake lining intermittent pushing assembly includes a cylinder, a first rocker arm, gear D, gear E, a second rocker arm, a third rocker arm, a first connecting rod and a clamping seat.

[0016] Preferably, gear D and gear E are meshed with each other, the axis of gear D is hinged with a first swing arm, the end of the first swing arm is hinged with a cylinder, and the end of the cylinder away from the first swing arm is hinged on the pedestal.

[0017] Preferably, the second swing arm is hinged to the axis of the gear E, and the end of the second swing arm is hinged to the fourth swing arm and the first connecting rod, wherein the fourth swing arm and the first connecting rod are coaxially connected, and the end of the fourth swing arm is hinged to the clamping seat.

[0018] Preferably, the clamping seat is in an arc shape that matches the brake lining, and a slide groove is provided on the inner side of the clamping seat, and the brake lining can be slidably installed in the slide groove.

[0019] Preferably, the end of the first connecting rod is hinged to the third rocker arm, and the end of the third rocker arm is connected to the brake lining inside the clamping seat through a pin shaft. The third rocker arm can move with the first rocker arm and the second rocker arm and drive the brake lining to slide along the slide groove, so that the brake lining slides and contacts the friction roller.

[0020] Preferably, the short slide groove on the pedestal is located between the two wing plates, a slide rod is arranged in the short slide groove, the slide rod is connected to the clamping seat, and the clamping seat can drive the first connecting rod and the second swing rod to swing through the first swing rod and move along the short slide groove through the slide rod.

[0021] Preferably, the above-mentioned brake lining intermittent pushing assembly drives the first rocker arm to deflect through the cylinder, and the first rocker arm drives gear D to engage gear E to move the second rocker arm, and the second rocker arm drives the clamping seat along the short slide groove to approach the friction roller member and contact and rub through the fourth rocker arm to achieve the fatigue test effect; at the same time, the second rocker arm will also drive the brake lining to slide along the slide groove through the first connecting rod and the third rocker arm, so that the brake lining 19 can slide and contact and rub against different positions of the friction roller member.

[0022] Preferably, a nozzle is provided inside the clamping seat, and the nozzle can be connected to an external cold source or heat source through a pipeline. High temperature and low temperature are delivered through the cold source or heat source, and are transferred to the brake lining. When the temperature is high, the wear and fatigue effects of the brake lining caused by high temperature during long-term braking can be simulated, and when the temperature is low, the wear and fatigue effects of the brake lining caused by braking in low temperature weather can be simulated.

[0023] The specific steps for fatigue and durability testing are as follows:

[0024] Step 1: Adjust the thickness of the friction roller according to the size of the brake lining. The thickness of the friction roller is adjusted by first loosening the adjustable bolts and then adding friction rings of different thicknesses and installing them between the side roller frame A and the side roller frame B through the bayonet.

[0025] Step 2: After the size of the friction roller is adjusted, the brake lining to be tested is arranged in the clamping seat, and the brake lining can slide with the slide groove of the clamping seat;

[0026] Step 3: The first motor drives the gear assembly to engage and make the friction roller run;

[0027] Step 4: Use the brake lining intermittent pushing assembly to intermittently simulate the brake lining approaching the friction roller to achieve a braking effect. On the one hand, the brake lining intermittent pushing assembly drives the first swing arm to deflect through the cylinder, and the first swing arm drives the gear D to engage the gear E to make the second swing arm move. On the one hand, the second swing arm drives the clamping seat to approach the friction roller along the short slide groove and contact and rub against the friction roller through the fourth swing arm to achieve a fatigue test effect; on the other hand, the second swing arm also drives the brake lining to slide along the slide groove through the first connecting rod and the third swing arm, so that the brake lining can slide and contact and rub against different positions of the friction roller, thereby simulating the braking environment of the brake lining;

[0028] Step 5: Deliver high and low temperatures through an external cold source or heat source so that the brake lining can simulate brake fatigue and wear in a relatively high or low temperature environment.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The test bench of the present invention can utilize the brake lining intermittent pushing assembly to intermittently push the brake lining / brake lining of the holding brake, so as to simulate the fatigue condition of the brake lining under intermittent braking of the elevator.

[0031] 2. The present invention can deliver high and low temperatures through an external cold source or heat source, simulating the wear and fatigue effects of high temperature / long-term braking / low temperature on the brake lining, and further improving the detection range.

[0032] 3. The friction rollers provided on the test bench of the present invention can be adaptively adjusted to meet the fatigue / wear simulation test of brake linings of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0034] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0035] Figure 3 It is a structural schematic diagram of a friction assembly in an embodiment of the present invention;

[0036] Figure 4 It is a schematic structural diagram of a friction roller member in an embodiment of the present invention;

[0037] Figure 5 It is a structural schematic diagram of a brake lining intermittent pushing assembly in an embodiment of the present invention;

[0038] Figure 6 It is a schematic structural diagram of a clamping seat in an embodiment of the present invention. Figure 7 It is a schematic diagram of a conventional electromagnetic holding brake in the prior art.

[0039] In the figure: 1. base; 2. short slide; 3. wing plate; 4. stand; 5. gear A; 6. gear B; 7. gear C; 8. friction roller; 801. side stick frame A; 802. side roller frame B; 803. friction ring; 9. cylinder; 10. first rocker arm; 11. gear D; 12. gear E; 13. second rocker arm; 14. third rocker arm; 15. first connecting rod; 16. clamping seat; 17. slide rod; 18. nozzle; 19. brake lining; 20. fourth rocker arm. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0042] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The present invention provides a technical solution: an elevator brake fatigue test bench, which can utilize a brake lining intermittent pushing component to intermittently push the brake lining 19 of a holding brake, so as to simulate the fatigue working condition of the brake lining 19 under intermittent braking of the elevator, and realize fatigue and durability testing of the brake lining 19 of the electromagnetic holding brake.

[0044] See also Figure 1-2 An elevator brake fatigue test bench comprises a pedestal 1, a friction assembly and a brake lining intermittent push assembly, wherein the pedestal 1 has a convex cross-section, a short slide 2 and two wing plates 3 are arranged at the center of the top surface of the pedestal 1, and the friction assembly and the brake lining intermittent push assembly are arranged on the pedestal 1.

[0045] See also Figure 3 The friction assembly includes a stand 4, a friction roller 8, a gear assembly and a first motor, wherein the friction roller 8 is rotatably installed on the inner side of the stand 4 through an axle, and a gear assembly is arranged on the rear side of the friction roller 8. The gear assembly includes a gear A5, a gear B6 and a gear C7 installed on one side of the wing plate 3, wherein the gear A5, the gear B6 and the gear C7 are meshed, the gear A5 is sleeved on the axle and is coaxially connected to the friction roller 8, and the gear C7 can be connected to the motor on the rear side of the stand 4.

[0046] See also Figure 4 In this embodiment, the friction roller 8 includes a side frame A801, a side roller frame B802 and a friction ring 803, wherein the friction ring 803 is located between the side frame A801 ​​and the side roller frame B802, and the side frame A801, the friction ring 803 and the side roller frame B802 are connected by adjustable bolts. The outer sides of the side frame A801, the friction ring 803 and the side roller frame B802 are all provided with friction surfaces for rubbing the brake lining 19, and the inner side of the friction ring 803 is provided with an anti-slip bayonet, through which the friction ring 803 can be installed between the side frame A801 ​​and the side roller frame B802. The friction ring 803 is easy to load and unload, and the thickness of the entire friction roller 8 can be adjusted by adding friction rings 803 of different thicknesses and installing them between the side frame A801 ​​and the side roller frame B802 through the bayonet, which can meet the fatigue test of some brake linings with different thicknesses.

[0047] See also Figure 5 In this embodiment, the brake lining intermittent push assembly is used to clamp the brake lining 19 and intermittently contact and rub the friction roller 8. The brake lining intermittent push assembly includes a cylinder 9, a first swing rod 10, a gear D11, a gear E12, a second swing rod 13, a third swing rod 14, a first connecting rod 15 and a clamping seat 16. The gear D11 and the gear E12 are meshed and arranged. The gear D11 is hinged with the first swing rod 10 on the axis. The end of the first swing rod 10 is hinged to the cylinder 9. The end of the cylinder 9 away from the first swing rod 10 is hinged on the base 1.

[0048] In this embodiment, the second swing rod 13 is hinged to the axis of the gear E12, and the end of the second swing rod 13 is hinged to the fourth swing rod 20 and the first connecting rod 15, wherein the fourth swing rod 20 and the first connecting rod 15 are coaxially connected, and the end of the fourth swing rod 20 is hinged to the clamping seat 16.

[0049] See also Figure 5 , 6 In this embodiment, the clamping seat 16 is in an arc shape that matches the brake lining 19. A slide groove is provided on the inner side of the clamping seat 16, and the brake lining 19 can be slidably installed in the slide groove.

[0050] In this embodiment, the end of the first connecting rod 15 is hinged to the third rocker arm 14, and the end of the third rocker arm 14 is connected to the brake lining 19 on the inner side of the clamping seat 16 through a pin shaft. The third rocker arm 14 can move with the first rocker arm 10 and the second rocker arm 13 and drive the brake lining 19 to slide along the slide groove, so that the brake lining 19 slides and contacts the friction roller 8.

[0051] In this embodiment, the short slide groove 2 on the pedestal 1 is located between the two wing plates 3, and a slide rod 17 (such as Figure 3 The slide bar 17 is connected to the clamping seat 16. The clamping seat 16 can drive the first connecting rod 15 and the second swing rod 13 to swing through the first swing rod 10 and move along the short slide groove 2 through the slide bar 17.

[0052] In this embodiment, the principle of the brake lining intermittent pushing assembly is as follows:

[0053] The cylinder 9 drives the first swing arm 10 to deflect, and the first swing arm 10 drives the gear D11 to engage the gear E12, so that the second swing arm 13 moves, and the second swing arm 13 drives the clamping seat 16 along the short slide groove 2 to approach the friction roller 8 and contact and rub against it through the fourth swing arm 20, so as to achieve the fatigue test effect; in addition, the second swing arm 13 will also drive the brake lining 19 to slide along the slide groove through the first connecting rod 15 and the third swing arm 14, so that the brake lining 19 can slide and contact and rub against different positions of the friction roller 8.

[0054] See also Figure 6 In this embodiment, a nozzle 18 is further provided inside the clamping seat 16, and the nozzle 18 can be connected to an external cold source or heat source through a pipeline. High temperature and low temperature are delivered through the cold source or heat source, and are transferred to the brake lining 19. When the temperature is high, the wear and fatigue effects of the brake lining 19 caused by high temperature during long-term braking can be simulated, and when the temperature is low, the wear and fatigue effects of the brake lining 19 caused by braking in low temperature weather can be simulated.

[0055] The specific steps for fatigue and durability testing are as follows:

[0056] Step 1: Adjust the thickness of the friction roller 8 according to the size of the brake lining 19. The thickness of the friction roller 8 is adjusted by first loosening the adjustable bolts and then installing friction rings 803 of different thicknesses between the side roller frame A801 ​​and the side roller frame B802 through the bayonet.

[0057] Step 2: After the size adjustment of the friction roller 8 is completed, the brake lining 19 to be tested is arranged in the clamping seat 16, and the brake lining 19 can slide with the slide groove of the clamping seat 16;

[0058] Step 3: The first motor drives the gear assembly to engage and make the friction roller 8 run;

[0059] Step 4: Use the brake lining intermittent pushing assembly to intermittently simulate the brake lining 19 approaching the friction roller 8 to achieve a braking effect. On the one hand, the brake lining intermittent pushing assembly drives the first swing arm 10 to deflect through the cylinder 9, and the first swing arm 10 drives the gear D11 to engage the gear E12 to move the second swing arm 13. On the one hand, the second swing arm 13 drives the clamping seat 16 along the short slide 2 to approach the friction roller 8 and contact and rub against it through the fourth swing arm 20 to achieve a fatigue test effect; on the other hand, the second swing arm 13 also drives the brake lining 19 to slide along the slide trough through the first connecting rod 15 and the third swing arm 14, so that the brake lining 19 slides and contacts and rubs against different positions of the friction roller 8, thereby simulating the braking environment of the brake lining 19;

[0060] Step 5: Deliver high and low temperatures through an external cold source or heat source, so that the brake lining 19 can simulate brake fatigue and wear in a relatively high or low temperature environment.

[0061] It is worth noting that the entire device is controlled by a general control system. Since the equipment matched with the control system is commonly used equipment and belongs to existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.

[0062] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0063] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An elevator brake fatigue test bench, characterized in that: The fatigue test bench is used to perform fatigue and durability tests on the brake lining (19) of the electromagnetic brake. The fatigue test bench comprises a bench (1), a friction assembly and a brake lining intermittent push assembly, wherein the side section of the bench (1) is in the shape of a convex character, a short slide groove (2) and two wing plates (3) are provided at the center of the top surface of the bench (1), and the friction assembly and the brake lining intermittent push assembly are arranged on the bench (1); the friction assembly comprises a bench (4), a friction roller (8), a gear assembly and a first motor, wherein the friction roller (8) is rotatably mounted on the inner side of the bench (4) through a shaft, and a gear assembly is arranged at the rear side of the friction roller (8), and the gear assembly comprises a gear A (5), a gear B (6) and a gear C (7) installed on one side of the wing plate (3), wherein the gear A (5), the gear B (6) and the gear C (7) are arranged in meshing, the gear A (5) is sleeved on the shaft and is coaxially connected to the friction roller (8), and the gear C (7) can be connected to the motor at the rear side of the bench (4).

2. The elevator brake fatigue test bench according to claim 1, characterized in that: The friction roller member (8) comprises a side roller frame A (801), a side roller frame B (802) and a friction ring (803), wherein the friction ring (803) is located between the side roller frame A (801) and the side roller frame B (802), and the side roller frame A (801), the friction ring (803) and the side roller frame B (802) are connected by adjustable bolts.

3. The elevator brake fatigue test bench according to claim 2 is characterized in that: The outer sides of the side roller frame A (801), the friction ring (803) and the side roller frame B (802) are all provided with friction surfaces for rubbing the brake lining (19), and the inner side of the friction ring (803) is provided with an anti-slipping slot, and the friction ring (803) can be installed between the side roller frame A (801) and the side roller frame B (802) through the anti-slipping slot.

4. The elevator brake fatigue test bench according to claim 1, characterized in that: The brake lining intermittent pushing assembly is used to clamp the brake lining (19) and intermittently contact and rub against the friction roller (8) reciprocatingly. The brake lining intermittent pushing assembly comprises a cylinder (9), a first swing arm (10), a gear D (11), a gear E (12), a second swing arm (13), a third swing arm (14), a first connecting rod (15) and a clamping seat (16), wherein the gear D (11) and the gear E (12) are meshed with each other.

5. The elevator brake fatigue test bench according to claim 4, characterized in that: The gear D (11) is hingedly connected to a first swing rod (10) at its axis, and the end of the first swing rod (10) is hingedly connected to a cylinder (9), and the end of the cylinder (9) away from the first swing rod (10) is hingedly mounted on the pedestal (1).

6. The elevator brake fatigue test bench according to claim 4, characterized in that: The second swing rod (13) is hinged to the axis of the gear E (12), and the end of the second swing rod (13) is hinged to the fourth swing rod (20) and the first connecting rod (15), wherein the fourth swing rod (20) and the first connecting rod (15) are coaxially connected, and the end of the fourth swing rod (20) is hinged to the clamping seat (16).

7. The elevator brake fatigue test bench according to claim 6, characterized in that: The clamping seat (16) is in an arc shape that matches the brake lining (19). A sliding groove is provided inside the clamping seat (16), and the brake lining (19) can be slidably mounted in the sliding groove.

8. The elevator brake fatigue test bench according to claim 4, characterized in that: The end of the first connecting rod (15) is hinged to the third swing rod (14), and the end of the third swing rod (14) is connected to the brake lining (19) inside the clamping seat (16) through a pin shaft. The third swing rod (14) can move with the first swing rod (10) and the second swing rod (13) and drive the brake lining (19) to slide along the slide groove, so that the brake lining (19) slides and contacts the friction roller (8).

9. The elevator brake fatigue test bench according to claim 1, characterized in that: The short slide groove (2) on the pedestal (1) is located between the two wing plates (3). A slide rod (17) is arranged in the short slide groove (2). The slide rod (17) is connected to the clamping seat (16). The clamping seat (16) can drive the first connecting rod (15) and the second swing rod (13) to swing through the first swing rod (10) and move along the short slide groove (2) through the slide rod (17).

10. The elevator brake fatigue test bench according to claim 7, characterized in that: A nozzle (18) is also provided on the inner side of the clamping seat (16), and the nozzle (18) can be connected to an external cold source or heat source through a pipeline.

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