A governor pulling force test device

Abstract

The present invention relates to a device for testing the pulling force of a speed limiter, which comprises a frame, a steel wire rope, a counterweight, a speed limiter mounting seat, a driving motor, a first guide pulley, a first guide assembly and a second guide assembly. The driving motor and the first guide pulley are located above the speed limiter mounting seat, and the first guide assembly and the second guide assembly are located below the speed limiter mounting seat. One end of the steel wire rope is drivingly connected to the driving motor, and the steel wire rope sequentially passes around the first guide assembly, the rope pulley of the speed limiter mounted on the speed limiter mounting seat, the second guide assembly, the first guide pulley, and the other end of the steel wire rope is connected to the counterweight, and the counterweight is located below the first guide pulley. A tension sensor is connected in series on the steel wire rope. In the present invention, the driving motor and the first guide pulley are arranged above the speed limiter mounting seat, the two guide assemblies are arranged below the speed limiter mounting seat, and the counterweight is arranged below the first guide pulley, so that while the counterweight has a sufficient stroke, the structure is compact, and it is convenient to realize the two-way pulling force test.

Description

Technical Field

[0001] The present invention belongs to the technical field of elevator accessories, and particularly relates to a device for testing the pulling force of a speed governor. Background Art

[0002] The speed governor is one of the safety control components for elevator safety protection. For example, the speed governor disclosed in the patent document with the publication number CN112573319A. The magnitude of the pulling force of the speed governor directly determines whether the safety gear can quickly stop the elevator car on the guide rail. Therefore, it is particularly important to conduct a 100% pulling force test on the speed governor before leaving the factory.

[0003] Currently, there are corresponding devices for testing the pulling force of the speed governor. For example, a testing platform for the pulling force of an elevator speed governor disclosed in the patent document with the publication number CN205575314U. However, the existing devices for testing the pulling force of the speed governor cannot meet the requirement of quickly testing the bi-directional pulling force of a bi-directional speed governor. In addition, for the existing devices for testing the pulling force of the speed governor, when the pulling force is insufficient, they do not have the function of automatically adjusting the pulling force to meet the functional requirements, and can only be operated manually, resulting in low on-line testing and production efficiency. Summary of the Invention

[0004] Based on the above-mentioned disadvantages and deficiencies existing in the prior art, one of the objectives of the present invention is to at least solve one or more of the above-mentioned problems existing in the prior art. In other words, one of the objectives of the present invention is to provide a device for testing the pulling force of a speed governor that meets one or more of the foregoing requirements.

[0005] To achieve the above-mentioned invention objective, the present invention adopts the following technical solutions:

[0006] A device for testing the pulling force of a speed governor includes a frame, a steel wire rope, a counterweight, a speed governor mounting seat, a driving motor, a first guide wheel, a first guiding assembly, and a second guiding assembly mounted on the frame. The driving motor and the first guide wheel are located above the speed governor mounting seat, and the first guiding assembly and the second guiding assembly are located below the speed governor mounting seat. One end of the steel wire rope is drivingly connected to the driving motor, and the steel wire rope sequentially passes around the first guiding assembly, the rope wheel of the speed governor mounted on the speed governor mounting seat, the second guiding assembly, the first guide wheel, and the other end of the steel wire rope is connected to the counterweight. The counterweight is located below the first guide wheel. A tension sensor is connected in series on the steel wire rope.

[0007] As a preferred solution, guiding columns are respectively provided on both sides of the frame corresponding to the counterweight, and the counterweight is in lifting fit with the guiding columns.

[0008] As a preferred solution, an upper travel switch and a lower travel switch are respectively provided on the frame for controlling the lifting stroke of the counterweight.

[0009] As a preferred solution, a counterweight cushion block is provided on the frame for supporting the counterweight block that moves to the position where the lower travel switch is triggered and stopped.

[0010] As a preferred solution, the first guiding assembly includes several first rollers arranged in sequence along the extending direction of the steel wire rope, and the second guiding assembly includes several second rollers arranged in sequence along the extending direction of the steel wire rope.

[0011] As a preferred solution, the structures of the first guiding assembly and the second guiding assembly are symmetrical to each other.

[0012] As a preferred solution, the overspeed governor pulling force testing device further includes a rotary encoder for judging whether the counterweight block moves upward or downward.

[0013] As a preferred solution, the overspeed governor mounting seat includes a seat body and a positioning shaft installed on the seat body. The positioning shaft is used for coaxially installing the overspeed governor so that the rope wheel of the overspeed governor rotates in cooperation with the positioning shaft; the seat body is further provided with a clamping mechanism for restricting or releasing the rotation of the rope wheel of the overspeed governor.

[0014] As a preferred solution, the clamping mechanism includes a driving cylinder and a clamping block drivingly connected to the driving head of the driving cylinder. Correspondingly, the centrifugal mechanism mounting plate of the overspeed governor has a clamping groove; the driving cylinder is used for driving the clamping block to be clamped in or disengaged from the clamping groove.

[0015] As a preferred solution, a synchronous driving mechanism and a feeding mechanism are installed on the frame. The synchronous driving mechanism is used for driving several bit heads to rotate synchronously, and the feeding mechanism is used for driving the bit heads to approach or move away from the overspeed governor installed on the overspeed governor mounting seat so as to synchronously adjust the limit screws of the overspeed governor and realize the adjustment of the frictional force generated between the rope wheel of the overspeed governor and the friction plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] In the overspeed governor pulling force testing device of the present invention, the driving motor and the first guiding wheel are arranged above the overspeed governor mounting seat, the first guiding assembly and the second guiding assembly are arranged below the overspeed governor mounting seat, and the counterweight block is arranged below the first guiding wheel. While realizing a sufficient stroke of the counterweight block, the overall structure is compact, and on-line testing of the unidirectional (or bidirectional) pulling force of the unidirectional (or bidirectional) overspeed governor during assembly production can be realized. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the overspeed governor pulling force testing device according to Embodiment 1 of the present invention;

[0019] Figure 2 is a schematic structural diagram of the overspeed governor pulling force testing device according to Embodiment 1 of the present invention (with the side plates omitted);

[0020] Figure 3 It is a schematic structural diagram (the frame and side plates are omitted) of the speed limiter pulling force test device according to Embodiment 1 of the present invention;

[0021] Figure 4 It is Figure 3 the front view of the shown structure;

[0022] Figure 5 It is Figure 3 the rear view of the shown structure;

[0023] Figure 6 It is a schematic structural diagram of the speed limiter mounting seat, synchronous drive mechanism and feed mechanism according to Embodiment 1 of the present invention;

[0024] Figure 7 It is a schematic structural diagram of the speed limiter mounting seat, synchronous drive mechanism and feed mechanism according to Embodiment 1 of the present invention (wherein, the rope wheel of the speed limiter is omitted);

[0025] Figure 8 It is a schematic structural diagram of the speed limiter mounting seat, synchronous drive mechanism and feed mechanism from another perspective according to Embodiment 1 of the present invention;

[0026] Figure 9 It is a schematic structural diagram of the back of the speed limiter mounting seat according to Embodiment 1 of the present invention;

[0027] Figure 10 It is a schematic structural diagram of the limit ring according to Embodiment 1 of the present invention;

[0028] Figure 11 It is a schematic structural diagram of the synchronous drive structure and feed mechanism according to Embodiment 1 of the present invention;

[0029] Figure 12 It is a schematic structural diagram of the synchronous drive structure and feed mechanism from another perspective according to Embodiment 1 of the present invention;

[0030] Figure 13 It is Figure 12 the sectional view of the A-A part in

[0031] Figure 14 It is Figure 12 the sectional view of the B-B part in

[0032] Figure 15 It is a schematic structural diagram of the driving gear according to Embodiment 1 of the present invention;

[0033] Figure 16 It is a schematic structural diagram of the driven gear according to Embodiment 1 of the present invention;

[0034] Figure 17 It is Figure 16 the sectional view of the I-I part in Specific embodiments

[0035] To more clearly illustrate the embodiments of the present invention, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, and other implementation manners can also be obtained.

[0036] Embodiment 1:

[0037] As Figure 1-17 shown, the overspeed governor pulling force test device of this embodiment includes a frame 1, a wire rope 2, an overspeed governor mounting seat 3, a first driving motor 4, a first guide pulley 5, a first guide assembly, a second guide assembly, a counterweight 6, a tension sensor 7, a guide column 8, a guide pulley 9, an upper travel switch 10, a lower travel switch 11, a counterweight cushion block 12, a rotary encoder 13, a clamping mechanism, a synchronous driving mechanism K, and a feeding mechanism.

[0038] The frame 1 is a frame structure formed by several cross beams and columns for installing each component of the test device. Among them, an operating platform 100 is installed in the middle of the frame 1, and closed side plates 110 are installed around the frame 1 corresponding to the positions of the wire rope and the counterweight.

[0039] The overspeed governor mounting seat 3 is installed on the operating platform 100 in the middle of the frame 1, and the first driving motor 4 and the first guide pulley 5 are installed on the top of the frame 1, so that the first driving motor 4 and the first guide pulley 5 are located above the overspeed governor mounting seat 3; the first guide assembly and the second guide assembly are installed on the top of the frame 1, so that the first guide assembly and the second guide assembly are located below the overspeed governor mounting seat 3.

[0040] One end of the wire rope 2 is drivingly connected to the motor shaft of the first driving motor 4. The wire rope 2 sequentially winds around the first guide assembly, the rope pulley a of the overspeed governor installed on the overspeed governor mounting seat 3, the second guide assembly, the first guide pulley 5, and the other end of the wire rope is connected to the counterweight 6. The counterweight 6 is located below the first guide pulley 5. Among them, a tension sensor 7 is connected in series on the wire rope 2, that is, a certain part of the wire rope is disconnected and connected by the tension sensor to detect the pulling force of the overspeed governor; the tension sensor 7 is located on the wire rope between the motor shaft of the first driving motor and the first guide assembly.

[0041] On both sides of the frame 1 of this embodiment corresponding to the counterweight 6, guide columns 8 are respectively provided, and the counterweight 6 is lifted and lowered in cooperation with the guide columns. Specifically, guide pulleys 9 are respectively installed on both sides of the counterweight 6. When the counterweight moves up or down, the guide pulleys 9 rollingly cooperate with the corresponding guide columns 8.

[0042] On the frame 1 of this embodiment, an upper travel switch 10 and a lower travel switch 11 are respectively provided to control the lifting stroke of the counterweight 6. That is, when the counterweight 6 moves upward to trigger the upper travel switch 10, the first driving motor 4 is controlled to stop or reverse; when the counterweight 6 moves downward to trigger the lower travel switch 11, the first driving motor 4 is controlled to stop or reverse. Among them, the upper travel switch 10 and the lower travel switch 11 adopt a combination of a transmissive sensor or a photoelectric sensor and a trigger piece.

[0043] In addition, a counterweight cushion block 12 is provided on the frame 1 of this embodiment to support the counterweight that moves to the trigger stop position of the lower travel switch.

[0044] As Figure 3 and 4 shown, the first guiding assembly of this embodiment includes two first large rollers 14a and several first small rollers 14b arranged in sequence along the extending direction of the steel wire rope. The second guiding assembly includes two second large rollers and several second small rollers 15b arranged in sequence along the extending direction of the steel wire rope. The first large rollers 14a and the second large rollers are symmetrically installed on both sides of the mounting base 14. The first small rollers 14b and the second small rollers 15b are all installed on the front side of the mounting base 14, and the first small rollers 14b and the second small rollers 15b are symmetrically distributed, so that the structures of the first guiding assembly and the second guiding assembly are symmetrical to each other. The mounting base 14 is fixedly installed on the frame 1. Among them, as Figure 5 shown, a rotary encoder 13 is coaxially installed corresponding to the first small roller or the second small roller. Based on detecting the forward or reverse rotation of the first small roller or the second small roller, it is determined whether the counterweight 6 moves upward or downward, so as to simulate the upward or downward movement of the elevator car and realize the two-way pulling force test.

[0045] As Figures 6-10 shown, the speed limiter mounting base 3 of this embodiment includes a seat body 30 and a positioning shaft 31 installed on the seat body 30. The positioning shaft 31 is used to coaxially install the speed limiter so that the rope wheel a of the speed limiter rotates in cooperation with the positioning shaft 31. Among them, a limit ring 32 is fitted and installed on the seat body 30 for positioning and installing the speed limiter. In addition, a clamping mechanism is provided on the seat body 30 to limit or release the rotation of the rope wheel of the speed limiter. Specifically, the clamping mechanism includes a driving cylinder 16 and a clamping block 17 drivingly connected to the driving head of the driving cylinder. Correspondingly, the centrifugal mechanism mounting plate b of the speed limiter has several circumferentially distributed slots b0, and the limit ring 32 has an avoidance slot 320 designed corresponding to the clamping block 17 to avoid the movement of the clamping block. The driving cylinder 16 is used to drive the clamping block 17 to be clamped in or disengaged from the slot. Among them, the clamping block 17 and the driving cylinder 16 are respectively located on both sides of the seat body 30. The clamping block 17 is vertically connected to the driving head of the driving cylinder through a connecting rod 18. The seat body 30 has a travel hole 300 for avoiding the movement of the connecting rod 18, and the connecting rod 18 passes through the travel hole 300.

[0046] On the frame 1 of this embodiment, a synchronous drive mechanism and a feeding mechanism are further installed. The synchronous drive mechanism is used to drive the four bit heads P to rotate synchronously, and the feeding mechanism is used to drive all the bit heads to approach or move away from the speed limiter installed on the speed limiter mounting seat, so as to synchronously adjust the four limit screws S of the speed limiter, realize the adjustment of the frictional force generated between the rope pulley and the friction plate of the speed limiter, and thus improve the efficiency and adjustment accuracy of the speed limiter pulling force adjustment.

[0047] Specifically, as Figures 11-14 shown, the synchronous drive mechanism includes a base 19 and a second drive motor 20, a driving wheel 21, a synchronous belt 22, a driven wheel 23, a driving gear 24, four driven gears 25, four rotating heads 26, a torque adjusting support 27, four torsion springs 28 and four bit head fixing sleeves 29 installed on the base 19. The two sides of the base 19 are respectively installed on a bottom plate D through the first linear guide rail E; that is, there are two bottom plates D, which are respectively located on both sides of the base 19; each bottom plate D is installed on the base 1 through the second linear guide rail 34, and the second linear guide rail 34 is parallel to the first linear guide rail E to ensure the straightness of the movement; the torque adjusting support 27 is installed on the two bottom plates D, the driving gear 24 and all the driven gears 25 are rotatably installed on the base 19, and all the rotating heads 26 are rotatably installed on the torque adjusting support 27.

[0048] Specifically, the motor shaft of the second drive motor 20 is coaxially drivingly connected to the driving wheel 21, the driving wheel 21 and the driven wheel 23 are driven by the synchronous belt 22, the driven wheel 23 is coaxially drivingly connected to the driving gear 24, the four driven gears 25 are evenly distributed along the circumference of the driving gear 24, and all the driven gears 25 are meshed with the driving gear 24. Each driven gear 25 is coaxially drivingly connected to its corresponding rotating head 26 and the driven gear 25 can move axially along the rotating head 26 to realize axial mobility and radial linkage; among them, as Figure 15 shown, the driving gear 24 is of a cylindrical gear structure, and sequentially includes a driven wheel linkage section 24a, a first bearing installation section 24b and a first gear section 24c along its axis. The driven wheel linkage section 24a is coaxially drivingly connected to the driven wheel 23, and the first bearing installation section 24b is installed on the base 19 through two deep groove ball bearings distributed at an axial distance; as Figure 16 and 17As shown in the figure, the driven gear 25 has a cylindrical gear structure, and sequentially includes a rotating head docking section 25a, a second gear section 25b, and a second bearing mounting section 25c along its axial direction. The rotating head docking section 25a is drivingly connected to the adjacent end of its corresponding rotating head 26, and the rotating head docking section can move axially along the rotating head 26 to drive the bit fixing sleeve to move axially along the rotating head, so as to realize the movement of the bit P in the direction of tightening or loosening the limit screw S. The docking structure between the rotating head docking section and the rotating head can adopt a spline structure or a hexagonal cross-section structure, which can not only realize synchronous rotation but also axial movement. The specific structure will not be elaborated here. Among them, the end of the driven gear 25 corresponding to the rotating head docking section 25a has a concave cavity 25d as the stroke space of the bit fixing sleeve. The second bearing mounting section 25c is mounted on the base 19 through deep groove ball bearings Z1 and tapered roller bearings Z2 distributed at axial intervals, and the tapered roller bearing Z2 is adjacent to the second gear section 25b of the driven gear. The second gear section 25b of the driven gear meshes with the first gear section 24c of the driving gear to realize synchronous transmission.

[0049] In addition, the rotating head 26 is mounted on the torque adjustment support 27 through a bearing Z3, and the bit fixing sleeve 29 is drivingly connected coaxially with its corresponding rotating head 26. Among them, the docking structure between the bit fixing sleeve 29 and the rotating head 26 can adopt a spline structure or a hexagonal cross-section structure, which can not only realize synchronous rotation but also axial movement. The specific structure will not be elaborated here. The bit P is coaxially mounted within the bit fixing sleeve 29, and the end of the bit P protrudes outside the bit fixing sleeve to tighten or loosen the limit screw. The torsion spring 28 is mounted between the bit fixing sleeve 29 and its corresponding rotating head 26, and the torsion spring 28 is sleeved outside the bit fixing sleeve 29. When the bit P moves axially along the rotating head 26 under the action of an axial external force (i.e., the force generated by the bit P abutting against the limit screw) and drives the bit fixing sleeve 29 to abut against the driven gear 25, the torsion spring 28 is compressed during this process.

[0050] The feeding mechanism of this embodiment is mounted on the torque adjustment support 27. The feeding mechanism adopts a first feeding cylinder F, and the driving end of the first feeding cylinder F is drivingly connected to the base 19 to realize feeding while the bit P rotates, so as to tighten or loosen the limit screw.

[0051] A second feeding cylinder 33 is also mounted on the base 1 of this embodiment. The driving end of the second feeding cylinder 33 is drivingly connected to the bottom plate D to drive the bottom plate D to move relative to the base 1, so that the overall synchronous driving mechanism K approaches or moves away from the speed limiter mounting seat 3 to provide sufficient space for loading and unloading the speed limiter.

[0052] Embodiment 2:

[0053] The difference between the speed limiter pulling force test device of this embodiment and that of Embodiment 1 is:

[0054] The number of the bit heads is not limited to the four described in Embodiment 1, and may also be three, five, etc. Specifically, it is adjusted according to the structure of the actual speed limiter to meet the requirements of different application scenarios;

[0055] Other structures can refer to Embodiment 1.

[0056] Embodiment 3:

[0057] The difference between the speed limiter pulling force test device of this embodiment and that of Embodiment 1 lies in:

[0058] The above synchronous drive mechanism and feed mechanism are omitted to meet the requirements of different application scenarios;

[0059] Other structures can refer to Embodiment 1.

[0060] Embodiment 4:

[0061] The difference between the speed limiter pulling force test device of this embodiment and that of Embodiment 1 lies in:

[0062] The installation position of the rotary encoder is not limited to the above-mentioned first small roller or second small roller, and it can also be installed on the first drive motor or other positions that can realize up and down detection, or the setting of the rotary encoder can be omitted to meet the requirements of different application scenarios;

[0063] Other structures can refer to Embodiment 1.

[0064] Embodiment 5:

[0065] The difference between the speed limiter pulling force test device of this embodiment and that of Embodiment 1 lies in:

[0066] Omit the bottom plate, the first linear guide rail and the first feed cylinder corresponding to the synchronous drive mechanism, and directly realize the feeding by the feed mechanism, and directly realize the tightening or loosening of the bit head to the limit screw, simplify the structure, and meet the requirements of different application scenarios.

[0067] The above is only a detailed description of the preferred embodiments and principles of the present invention. For those of ordinary skill in the art, according to the idea provided by the present invention, there will be changes in the specific implementation manners, and these changes should also be regarded as the protection scope of the present invention.

Claims

1. A governor lifting force test device, characterized in that, It includes a frame, a steel wire rope, a counterweight, a speed limiter mounting seat mounted on the frame, a drive motor, a first guide wheel, a first guide assembly and a second guide assembly. The drive motor and the first guide wheel are located above the speed limiter mounting seat, and the first guide assembly and the second guide assembly are located below the speed limiter mounting seat. One end of the steel wire rope is drivingly connected to the drive motor, and the steel wire rope sequentially winds around the first guide assembly, the rope wheel of the speed limiter mounted on the speed limiter mounting seat, the second guide assembly, the first guide wheel to the other end of the steel wire rope and is connected to the counterweight. The counterweight is located below the first guide wheel. A tension sensor is connected in series on the steel wire rope. The first guide assembly includes two first large rollers and several first small rollers arranged in sequence along the extension direction of the steel wire rope. The second guide assembly includes two second large rollers and several second small rollers arranged in sequence along the extension direction of the steel wire rope. The first large rollers and the second large rollers are symmetrically mounted on both sides of the mounting base. The first small rollers and the second small rollers are all mounted on the front side of the mounting base, and the first small rollers and the second small rollers are symmetrically distributed, so that the structures of the first guide assembly and the second guide assembly are symmetrical to each other. The mounting base is fixedly mounted on the frame. Among them, a rotary encoder is coaxially mounted corresponding to the first small roller or the second small roller. Based on detecting the forward or reverse rotation of the first small roller or the second small roller, the upward or downward movement of the counterweight is judged, so as to simulate the upward or downward movement of the elevator car and realize the two-way pulling force test.

2. The speed limiter pulling force test device according to claim 1, wherein Guide columns are respectively arranged on both sides of the frame corresponding to the counterweight, and the counterweight is lifted and lowered in cooperation with the guide columns.

3. The speed limiter pulling force test device according to claim 2, wherein An upper travel switch and a lower travel switch are respectively arranged on the frame, which are used to control the lifting stroke of the counterweight.

4. The speed limiter pulling force test device according to claim 3, wherein A counterweight cushion block is arranged on the frame, which is used to support the counterweight that moves to the trigger stop position of the lower travel switch.

5. The speed limiter pulling force testing device according to claim 1, characterized in that, The speed limiter mounting seat includes a seat body and a positioning shaft mounted on the seat body. The positioning shaft is used to coaxially mount the speed limiter so that the rope wheel of the speed limiter rotates in cooperation with the positioning shaft. The seat body is also provided with a clamping mechanism for restricting or releasing the rotation of the rope wheel of the speed limiter.

6. The speed limiter pulling force test device according to claim 5, characterized in that, The clamping mechanism includes a driving cylinder and a clamping block drivingly connected to the driving head of the driving cylinder. Correspondingly, the centrifugal mechanism mounting plate of the speed limiter has a clamping groove. The driving cylinder is used to drive the clamping block to be clamped in or disengaged from the clamping groove.

7. The speed limiter pulling force testing device according to claim 1, characterized in that A synchronous driving mechanism and a feeding mechanism are mounted on the frame. The synchronous driving mechanism is used to drive several bit heads to rotate synchronously. The feeding mechanism is used to drive the bit heads to approach or move away from the speed limiter mounted on the speed limiter mounting seat, so as to synchronously adjust the limit screws of the speed limiter and realize the adjustment of the frictional force generated between the rope wheel of the speed limiter and the friction plate.

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