Speed testing equipment for elevator speed governor

Abstract

The invention discloses an elevator speed governor speed test device, and relates to the technical field of elevator test.The elevator speed governor speed test device comprises a base, a frame, a lifting mechanism, a driving mechanism and a speed tester, and the frame is arranged on the base in an extending mode in the vertical direction; the lifting mechanism is arranged on the frame and comprises a lifting part and a lifting driving structure, the lifting part can move in the vertical direction relative to the frame, and the lifting driving structure is used for driving the lifting part to move in the vertical direction; the driving mechanism comprises a driving wheel and a rotary driving structure, the rotary driving structure is arranged on the lifting part, the driving wheel is located above the mounting structure of the base and can rotate around the axis in the first horizontal direction, and the rotary driving structure is in transmission connection with the driving wheel. According to the technical scheme provided by the invention, the contact surface of the driving wheel and the speed governor rope wheel is adjusted so as to have enough adhesion and static pressure, and the possibility that the driving wheel slips or shifts easily during testing is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of elevator testing, and in particular to a speed testing device for an elevator speed limiter. Background Art

[0002] The elevator speed limiter is a very important safety component of the elevator. It is responsible for monitoring the running speed of the elevator. When the elevator is overspeeding, the electrical safety switch on the speed limiter will be activated first, disconnecting the elevator's safety circuit and stopping the elevator. If the elevator continues to accelerate after the electrical action, the mechanical part of the speed limiter will be activated, triggering the action of the safety clamp or rope clamp and other protective devices, forcibly stopping the elevator. The speed limiter ensures the safety of the elevator through electrical and mechanical actions, avoiding extremely dangerous elevator accidents.

[0003] According to the requirements of TSG T7007-2022 "Elevator Type Test Rules", as an elevator safety protection device, the speed limiter should be subjected to type testing and pre-delivery commissioning and verification. The most important thing is to test its electrical and mechanical action speeds to verify the safety and reliability of the product. The existing speed limiter action speed test device has limited height adjustment of the drive wheel. It is difficult to ensure that the contact surface between the drive wheel and the speed limiter rope wheel has sufficient adhesion and static pressure during installation, which can easily cause the drive wheel to slip or shift during testing. Summary of the invention

[0004] The main purpose of the present invention is to provide an elevator speed governor speed testing device, which aims to adjust the contact surface between the driving wheel and the speed governor rope wheel to have sufficient adhesion and static pressure, thereby reducing the driving wheel from slipping or shifting during testing.

[0005] To achieve the above object, the present invention provides an elevator speed limiter speed testing device, comprising:

[0006] A base, wherein the upper end of the base is provided with a mounting structure for fixing the elevator speed limiter,

[0007] A frame is extended in the up-down direction and arranged on the base;

[0008] A lifting mechanism, arranged on the frame, comprising a lifting part and a lifting driving structure, wherein the lifting part can move in an up-down direction relative to the frame, and the lifting driving structure is used to drive the lifting part to move in an up-down direction;

[0009] A driving mechanism, comprising a driving wheel and a rotating driving structure, wherein the rotating driving structure is disposed on the lifting portion, the driving wheel is located above the mounting structure of the base, and the driving wheel can rotate around an axis in a first horizontal direction, and the rotating driving structure is in driving connection with the driving wheel; and,

[0010] A speed tester is used to test the rotation speed of the elevator speed limiter.

[0011] In one embodiment, the mounting structure comprises:

[0012] A pressing plate, one end of which is arranged on the upper end of the base, and the other end of which is arranged on the elevator speed limiter at a distance relative to the upper end of the base, so as to fix the elevator speed limiter at the distance between the pressing plate and the base; and

[0013] A mounting seat, wherein the lower end of the mounting seat is detachably connected to the upper end of the base, and the upper end of the mounting seat is detachably connected to the pressing plate.

[0014] In one embodiment, a limiting groove opened along the first horizontal direction is provided on the base, and a limiting portion adapted to fit with the limiting groove is provided at the lower end of the mounting seat.

[0015] In one embodiment, a through slot extending in an up-down direction is provided in the frame, and the lifting part is slidably disposed in the through slot.

[0016] In one embodiment, a transmission assembly is provided between the lifting part and the lifting drive structure, and the transmission assembly includes:

[0017] A connecting rod is extended in the up-down direction, and the lower end of the connecting rod is arranged on the lifting part;

[0018] A baffle, disposed at the upper end of the connecting rod;

[0019] A movable plate is movably arranged on the connecting rod in the up-down direction to define a pressing section and a lifting section of the connecting rod in the up-down direction, and the lifting drive structure is used to drive the movable plate to move up-down relative to the connecting rod;

[0020] a first elastic member, sleeved on the pressing section, and located between the moving plate and the lifting part; and

[0021] The second elastic member is disposed on the lifting section, and the second elastic member is located between the moving plate and the baffle.

[0022] In one embodiment, the transmission assembly further includes a pressure sensor, and the pressure sensor is located below the movable plate and installed on the lifting part.

[0023] In one embodiment, the driving wheels are provided in plurality and have different sizes, and the plurality of driving wheels are arranged at intervals in the first horizontal direction on the output shaft of the rotary driving structure.

[0024] In one embodiment, the lifting mechanism further includes the control device and a limit switch electrically connected to the control device, and the control device controls the upper and lower limit travels of the lifting part on the frame according to the limit switch.

[0025] In one embodiment, the lower end of the speed tester is adsorbed on the base or the frame.

[0026] In one embodiment, the elevator speed governor speed testing device further comprises a cover body, wherein the cover body is disposed on the circumference of the base, and at least a portion of the cover body is transparent.

[0027] In the technical solution of the present invention, a stable support platform is provided by the base, and the installation structure configured at the upper end of the base is used to adapt to elevator speed limiters of different models and specifications, so that the elevator speed limiter can be firmly fixed in the test position. The frame is extended in the up and down directions to provide installation space for the subsequent lifting mechanism. The position of the lifting part on the frame is driven by the lifting drive structure to test speed limiters of different sizes and types. The rotating drive structure is installed on the lifting part, can move up and down with the lifting part, and can drive the driving wheel to rotate around the axis in the first horizontal direction. The driving wheel drives the test wheel of the elevator speed limiter. The speed tester can be used to measure the rotation speed of the elevator speed limiter.

[0028] Furthermore, since the lifting part can adjust its position on the frame, the driving wheel can adjust the distance between it and the elevator speed limiter, thereby adjusting the contact surface between the driving wheel and the test wheel of the elevator speed limiter to have sufficient adhesion and static pressure, thereby reducing the slippage or displacement of the driving wheel during testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0030] Figure 1 A schematic structural diagram of an embodiment of an elevator speed governor speed testing device provided by the present invention;

[0031] Figure 2 for Figure 1 A structural diagram of the speed test equipment for the speed limiter of an elevator from another angle;

[0032] Figure 3 for Figure 1 Front view of the speed test equipment for the speed limiter of the elevator;

[0033] Figure 4 for Figure 1 Side view of the speed test equipment for the speed limiter of the elevator;

[0034] Figure 5 for Figure 3 A partial enlarged view of the middle A;

[0035] Figure 6 for Figure 3 A partial enlarged view of point B in the middle.

[0036] Description of Figure Numbers:

[0037] 100. Elevator speed limiter speed test equipment; 200. Elevator speed limiter;

[0038] 1. Base; 11. Mounting structure; 111. Pressing plate; 112. Mounting seat; 113. Limiting part; 12. Limiting groove;

[0039] 2. frame; 21. through slot;

[0040] 3. Lifting mechanism; 31. Lifting part; 32. Lifting drive structure; 33. Transmission assembly; 331. Connecting rod; 3311. Pressing section; 3312. Lifting section; 332. Baffle; 333. Moving plate; 334. First elastic member; 335. Second elastic member;

[0041] 4. driving mechanism; 41. driving wheel; 42. rotating driving structure;

[0042] 5. Speed ​​tester.

[0043] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0044] 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.

[0045] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0046] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0047] The elevator speed limiter 200 is a very important safety component of the elevator, which is responsible for monitoring the running speed of the elevator. When the elevator is overspeeding, the electrical safety switch on the speed limiter will first be activated to disconnect the elevator's safety circuit and stop the elevator; if the elevator continues to accelerate after the electrical action, the mechanical part of the speed limiter will be activated, triggering the action of protective devices such as safety clamps or rope clamps, and forcibly stopping the elevator. The speed limiter ensures the safety of elevator operation through electrical and mechanical actions to avoid extremely dangerous elevator accidents. According to the requirements of TSG T7007-2022 "Elevator Type Test Rules", the speed limiter, as an elevator safety protection device, should be type tested and debugged before leaving the factory. The most important thing is to test its electrical action and mechanical action speed to verify the safety and reliability of the product. The existing speed limiter action speed test device has limited height adjustment of the drive wheel 41. It is difficult to ensure that the contact surface between the drive wheel 41 and the speed limiter rope wheel has sufficient adhesion and static pressure during installation, which is easy to cause the drive wheel 41 to slip or shift during testing.

[0048] In order to solve the above technical problems, Figures 1 to 4As shown, a speed test device 100 for an elevator speed governor 200 proposed by the present invention comprises a base 1, a frame 2, a lifting mechanism 3 and a driving mechanism 4. The upper end of the base 1 is provided with a mounting structure 11 for fixing the elevator speed governor 200, and the frame 2 is extended and arranged on the base 1 along the up-down direction; the lifting mechanism 3 is arranged on the frame 2, and comprises a lifting part 31 and a lifting driving structure 32, the lifting part 31 can move along the up-down direction relative to the frame 2, and the lifting driving structure 32 is used to drive the lifting part 31 to move along the up-down direction; and the driving mechanism 4 comprises a driving wheel 41 and a rotating driving structure 42, the rotating driving structure 42 is arranged on the lifting part 31, the driving wheel 41 is located above the mounting structure 11 of the base 1, and the driving wheel 41 can rotate around the axis of the first horizontal direction, and the rotating driving structure 42 is connected to the driving wheel 41 in a transmission manner; a speed tester 5, the speed tester 5 is used to test the rotation speed of the elevator speed governor 200.

[0049] In the technical solution of the present invention, a stable support platform is provided by the base 1, and the installation structure 11 configured at the upper end of the base 1 is used to adapt to elevator speed limiters 200 of different models and specifications, so that the elevator speed limiter 200 can be firmly fixed in the test position. The frame 2 is extended in the up and down directions to provide installation space for the subsequent lifting mechanism 3. The lifting drive structure 32 drives the position of the lifting part 31 on the frame 2 to test speed limiters of different sizes and types. The rotating drive structure 42 is installed on the lifting part 31, can move up and down with the lifting part 31, and can drive the driving wheel 41 to rotate around the axis in the first horizontal direction. The driving wheel 41 drives the test wheel of the elevator speed limiter 200. The speed tester 5 can be used to measure the speed of the elevator speed limiter 200.

[0050] Furthermore, since the lifting portion 31 can adjust its position on the frame 2, the driving wheel 41 can adjust the distance between itself and the elevator speed limiter 200, thereby adjusting the contact surface between the driving wheel 41 and the test wheel of the elevator speed limiter 200 to have sufficient adhesion and static pressure, thereby reducing the driving wheel 41 from slipping or shifting during testing.

[0051] It can be understood that the function of the mounting structure 11 is to connect the base 1 and the elevator speed limiter 200 so that the two remain relatively fixed and reduce the movement of the elevator speed limiter 200 during the test. Figure 5As shown, for this purpose, in one embodiment, the mounting structure 11 further includes a pressing plate 111 and a mounting seat 112. One end of the pressing plate 111 is arranged at the upper end of the base 1, and the other end of the pressing plate 111 is arranged on the elevator speed limiter 200 relative to the upper end of the base 1, so as to fix the elevator speed limiter 200 at the interval between the pressing plate 111 and the base 1; the lower end of the mounting seat 112 is detachably connected to the upper end of the base 1, and the upper end of the mounting seat 112 is detachably connected to the pressing plate 111. In this way, the mounting seat 112 is detachably connected to the upper end of the base 1, which not only simplifies the installation and disassembly process, but also enables the operator to replace the mounting seat 112 of different specifications according to specific test requirements. The upper end of the mounting seat 112 can fix the pressing plate 111 through a bolt hole, a clamp or other forms of fastening devices. The mounting seat 112 is firmly locked between the base 1 and the pressing plate 111 through the pressing plate 111, providing sufficient mechanical strength to support the force generated during the test and improve the accuracy of the test results. Specifically, in one embodiment, a strip hole is provided in the middle of the pressing plate 111, and the mounting seat 112 is inserted into the strip hole and is fastened with a nut, so that the position of the pressing plate 111 can be flexibly adjusted to cope with different elevator speed limiters 200.

[0052] Furthermore, in order to increase the stability of the connection between the mounting seat 112 and the base 1, in one embodiment, a limiting groove 12 opened along the first horizontal direction is provided on the base 1, and a limiting portion 113 adapted to the limiting groove 12 is provided at the lower end of the mounting seat 112. In this way, the limiting portion 113 can be accurately embedded in the limiting groove 12, and the freedom of movement of the limiting portion 113 and the limiting groove 12 can be limited according to the different cross-sectional shapes of the limiting groove 12. For example, when the limiting groove 12 is in an inverted "T" shape, the mounting seat 112 and the base 1 can only have the freedom of movement in the first horizontal direction, thereby reducing unnecessary movement of the mounting seat 112 during the test process. This is conducive to the accuracy of the test results.

[0053] It is understandable that the lifting part 31 can be arranged on one side or the middle of the frame 2, in order to improve the stability of the connection between the lifting part 31 and the frame 2. In one embodiment, a through slot 21 extending in the up-down direction is provided in the frame 2, and the lifting part 31 is slidably arranged in the through slot 21. In this way, the lifting part 31 can be subjected to force on both sides during the test through the through slot 21, thereby reducing shaking and improving the accuracy of the test.

[0054] It is understandable that the lifting part 31 can be directly connected to the output end of the lifting drive structure 32, or indirectly connected to the output end of the lifting drive structure 32. Figure 6As shown, specifically, in one embodiment, a transmission assembly 33 is provided between the lifting portion 31 and the lifting drive structure 32 , and the transmission assembly 33 includes a connecting rod 331 , a baffle 332 , a moving plate 333 , a first elastic member 334 and a second elastic member 335 . The connecting rod 331 is extended in the up-down direction, the lower end of the connecting rod 331 is arranged on the lifting part 31, and the baffle 332 is arranged on the upper end of the connecting rod 331; the moving plate 333 is movably arranged on the connecting rod 331 in the up-down direction to define the connecting rod 331 into a pressing section 3311 and a lifting section 3312 in the up-down direction, and the lifting driving structure 32 is used to drive the moving plate 333 to move up and down relative to the connecting rod 331; the first elastic member 334 is sleeved on the pressing section 3311, and the first elastic member 334 is located between the moving plate 333 and the lifting part 31; the second elastic member 335 is arranged on the lifting section 3312, and the second elastic member 335 is located between the moving plate 333 and the baffle 332. In this way, the lower end of the connecting rod 331 is directly installed on the lifting part 31, so that the movement state of the connecting rod 331 and the lifting part 31 are kept consistent. The baffle 332 is located at the upper end of the connecting rod 331 for installing the second elastic member 335. The movable plate 333 is driven by the lifting drive structure 32 to slide in the up-down direction on the connecting rod 331. The first elastic member 334 is to receive the force of the movable plate 333 and transfer it to the lifting part 31. The second elastic member 335 is to receive the force of the movable plate 333 and transfer it to the baffle 332. Its working principle is as follows: when the lifting drive structure 32 starts to work, it drives the movable plate 333 to move up and down along the connecting rod 331. According to the different positions of the movable plate 333, the working state of the transmission assembly 33 will also change: during the ascending process, when the movable plate 333 moves upward, the second elastic member 335 is gradually compressed to generate elastic force to the baffle 332. Under the action of a lifting force, the baffle 332 can drive the connecting rod 331 to move upward, thereby driving the lifting part 31 to move upward. Descending process: When the movable plate 333 moves downward, the first elastic member 334 begins to gradually contract, generating elastic force to the lifting part 31, and the lifting part 31 can move downward under the action of a pressure. It should be noted here that since the pressure received by the lifting part 31 is applied by the first elastic member 334, the pressure acting on the lifting part 31 can be adjusted and controlled by compressing the first elastic member 334, and fine adjustment can be performed to adjust the contact surface between the driving wheel 41 and the speed limiter rope wheel to have sufficient adhesion and static pressure, thereby reducing the slippage or displacement of the driving wheel 41 during testing.In order to control this process more accurately, in one embodiment, the transmission assembly 33 further includes a pressure sensor, which is located below the moving plate 333 and mounted on the lifting part 31. In this way, the data provided by the pressure sensor can be used to achieve accurate control of the movement of the lifting part 31. For example, when it is detected that the pressure exceeds the set range, the output power of the lifting drive structure 32 can be adjusted to keep the pressure at a stable and appropriate level.

[0055] It is understandable that the lifting drive structure 32 can be a motor linear module, a pneumatic lever drive or a hydraulic lever drive. In one embodiment, the lifting drive structure 32 adopts a screw-nut system. Specifically, the relative rotation between the screw and the nut is used to achieve linear displacement. When the motor drives the screw to rotate, the nut engaged therewith will move along the axial direction of the screw without self-rotation, thereby driving the lifting part 31 connected thereto to move up and down. In view of this, in order to avoid the lifting part 31 from exceeding the movement formation, in one embodiment, the lifting mechanism 3 also includes the control device and a limit switch electrically connected to the control device, and the control device controls the upper and lower limit travel of the lifting part 31 on the frame 2 according to the limit switch. In this way, the control device receives a signal from the limit switch to limit the upper and lower limit travel of the lifting part 31 in the frame 2, thereby reducing the possibility of equipment damage or test failure due to exceeding the range.

[0056] Since the diameter and size of the test wheel of different elevator speed limiters 200 are different, in one embodiment, the driving wheel 41 is provided with a plurality of different sizes, and the plurality of driving wheels 41 are arranged at intervals on the output shaft of the rotating drive structure 42 in the first horizontal direction. In this way, the driving wheels 41 of different sizes are evenly distributed on the output shaft of the rotating drive structure 42 along the first horizontal direction. The most suitable driving wheel 41 can be selected according to different types of elevator speed limiters 200, thereby improving the compatibility and flexibility of the test. It should be noted here that since the speeds required for the tests of different elevator speed limiters 200 are different, in one embodiment, the rotating drive structure 42 includes a servo motor, and the servo motor can be programmed according to different test requirements. For example, for tests that need to simulate actual operating conditions, complex acceleration, deceleration and constant speed stages can be set; while for simple constant speed tests, a fixed speed value can be directly set.

[0057] Since the positions of the test wheels on different elevator speed limiters 200 are different, in one embodiment, the lower end of the speed tester 5 is adsorbed on the base 1 or the frame 2. With such a configuration, the position of the speed tester 5 can be easily adjusted through the adsorption connection. Among them, the adsorption method can be achieved by vacuum adsorption or magnetic adsorption. Specifically, magnetic adsorption is suitable for metal bases 1, and strong adsorption is achieved through built-in strong magnets. The strength of the magnet should be large enough to resist vibrations that may occur during the test. Vacuum adsorption: For bases 1 with non-metallic or smooth surfaces, a vacuum suction cup can be used. Among them, in one embodiment, the speed detector includes a Hall proximity switch and a magnet, the magnet is adsorbed on the test wheel, and the Hall proximity switch is set close to the magnet. When the test wheel starts to rotate, the magnet rotates and periodically approaches the Hall proximity switch. Whenever the magnet approaches the Hall proximity switch, the Hall proximity switch senses the change in the magnetic field, outputs a pulse signal, and finally converts the pulse signal into the speed of the test wheel.

[0058] In one embodiment, the elevator speed limiter 200 speed test device 100 further includes a cover body, which is arranged on the peripheral side of the base 1, and at least a part of the cover body is transparent. In this way, the cover body protects the internal components from external interference, and the transparent part facilitates the operator to observe the test process, thereby increasing the convenience and safety of use. Among them, the cover body can be partially transparent, or all transparent.

[0059] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention and the drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An elevator speed limiter speed testing device, characterized in that: include: A base, wherein the upper end of the base is provided with a mounting structure for fixing the elevator speed limiter, A frame is extended in the up-down direction and arranged on the base; A lifting mechanism, arranged on the frame, comprising a lifting part and a lifting driving structure, wherein the lifting part can move in an up-down direction relative to the frame, and the lifting driving structure is used to drive the lifting part to move in an up-down direction; A driving mechanism, comprising a driving wheel and a rotating driving structure, wherein the rotating driving structure is disposed on the lifting portion, the driving wheel is located above the mounting structure of the base, and the driving wheel can rotate around an axis in a first horizontal direction, and the rotating driving structure is in driving connection with the driving wheel; and, A speed tester is used to test the rotation speed of the elevator speed limiter.

2. The elevator speed governor speed testing device according to claim 1, characterized in that: The mounting structure comprises: A pressing plate, one end of which is arranged on the upper end of the base, and the other end of which is arranged on the elevator speed limiter at a distance relative to the upper end of the base, so as to fix the elevator speed limiter at the distance between the pressing plate and the base; and A mounting seat, wherein the lower end of the mounting seat is detachably connected to the upper end of the base, and the upper end of the mounting seat is detachably connected to the pressing plate.

3. The elevator speed governor speed testing device according to claim 2, characterized in that: The base is provided with a limiting groove opened along the first horizontal direction, and the lower end of the mounting seat is provided with a limiting portion adapted to match the limiting groove.

4. The elevator speed governor speed testing device according to claim 1, characterized in that: A through slot extending in the up-down direction is provided in the frame, and the lifting part is slidably arranged in the through slot.

5. The elevator speed governor speed testing device according to claim 1 or 4, characterized in that: A transmission assembly is provided between the lifting part and the lifting drive structure, and the transmission assembly includes: A connecting rod is extended in the up-down direction, and the lower end of the connecting rod is arranged on the lifting part; A baffle, disposed at the upper end of the connecting rod; A movable plate is movably arranged on the connecting rod in the up-down direction to define a pressing section and a lifting section of the connecting rod in the up-down direction, and the lifting drive structure is used to drive the movable plate to move up-down relative to the connecting rod; a first elastic member, sleeved on the pressing section, and located between the moving plate and the lifting part; and The second elastic member is disposed on the lifting section, and the second elastic member is located between the moving plate and the baffle.

6. The elevator speed governor speed testing device according to claim 5, characterized in that: The transmission assembly also includes a pressure sensor, which is located below the moving plate and installed on the lifting part.

7. The elevator speed governor speed testing device according to claim 1, characterized in that: The driving wheels are provided in plurality with different sizes, and the plurality of driving wheels are arranged at intervals on the output shaft of the rotary driving structure in a first horizontal direction.

8. The elevator speed governor speed testing device according to claim 1, characterized in that: The lifting mechanism further comprises the control device and a limit switch electrically connected to the control device, and the control device controls the upper and lower limit travels of the lifting part on the frame according to the limit switch.

9. The elevator speed governor speed testing device according to claim 1, characterized in that: The lower end of the speed tester is adsorbed on the base or the frame.

10. The elevator speed governor speed testing device according to claim 1, characterized in that: The elevator speed governor speed testing device further comprises a cover body, which is arranged on the peripheral side of the base, and at least a part of the area on the cover body is transparent.

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