Clockwork spring type tensioning device

Abstract

The invention discloses a clockwork spring type tensioning device which comprises a tensioning wheel connected with a speed governor rope wheel through a speed governor steel wire rope and further comprises a support installed on a guide rail, a clockwork spring assembly and a stroke plate moving in the vertical direction are installed on the support, one end of the stroke plate is connected to the periphery of the clockwork spring assembly in a meshed mode, and the other end of the stroke plate is connected with the speed governor rope wheel in a meshed mode. The tensioning wheel is rotationally connected to the other end of the stroke plate, and the clockwork spring assembly can move the stroke plate to enable the tensioning wheel to provide tension for the speed limiter steel wire rope. The device has the advantages that the clockwork spring type design can simplify the structure and reduce the cost; the support, the stroke plate, the clockwork spring assembly and other components are mainly located in the space above the tensioning wheel, and space resources are saved; a plurality of anti-overloading positioning grooves are formed, the anti-overloading positioning grooves can be automatically switched when the pretightening force of the clockwork spring is too large, the pretightening force of the clockwork spring can be prevented from being too large, device maintenance is facilitated, adaptability and stability are good, and the travel switch is arranged so that a system can prompt maintenance personnel to conduct maintenance in time.

Description

Technical Field

[0001] The invention relates to the technical field of elevator speed limiter wire rope tensioning, in particular to a tensioning device. Background Art

[0002] The tension wheel can keep the speed limiter wire rope in tension at all times to ensure the safety of elevator operation. After a long period of operation, the speed limiter wire rope will become loose. Generally, a spring adjustment mechanism is set to automatically increase the distance between the tension wheel and the speed limiter rope wheel so that the speed limiter wire rope maintains appropriate tension.

[0003] The Chinese utility model patent publication number is CN206218990U, and the document named "Spring-type tensioning device for elevator speed limiter" discloses a spring-type tensioning device for elevator speed limiter, including a tensioning wheel, a rope wheel mounting seat, a guide assembly and a compression spring, wherein the tensioning wheel is mounted on the rope wheel mounting seat, the rope wheel mounting seat is mounted on the guide assembly and slides up and down along the guide assembly, both sides of the guide assembly and the compression spring are close to the axis position of the tensioning wheel to avoid the vertical projection of the safety clamp linkage mechanism, the upper and lower positions of the rope wheel mounting seat are located within or level with the upper and lower positions of the tensioning wheel, and the compression spring is installed in the rope wheel mounting seat so that the compression spring adopts a soft spring whose tension force decays slowly with the elongation. Although the compression spring in the patent can maintain sufficient tension during normal extension, it has a complex structure, high cost, large space resources, poor stability, no overload protection, and poor adaptability. Summary of the invention

[0004] The object of the present invention is to provide a clockwork spring type tensioning device to solve the problems of the tensioning device in the prior art, such as complex structure, high cost, large space occupation, poor stability, no overload protection, and poor adaptability.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The clockwork spring type tensioning device includes a tensioning wheel connected to a speed limiter rope wheel through a speed limiter wire rope, and also includes a bracket installed on a guide rail, on which a clockwork spring assembly and a stroke plate that moves in a vertical direction are installed, one end of the stroke plate is meshedly connected to the outer periphery of the clockwork spring assembly, and the tensioning wheel is rotatably connected to the other end of the stroke plate, and the clockwork spring assembly can move the stroke plate so that the tensioning wheel provides tension for the speed limiter wire rope.

[0007] Furthermore, the clockwork spring assembly includes a toothed base, a clockwork spring and an anti-overload protection cover, the clockwork spring is located in a cavity formed by the toothed base and the anti-overload protection cover, and one end of the travel plate is meshedly connected to the outer periphery of the toothed base.

[0008] Furthermore, the toothed base is provided with a plurality of protruding teeth on its outer periphery, a spring clamping shaft is provided at its center, a bayonet mounting position is provided on the spring clamping shaft, and one or more arc-shaped positioning blocks are provided near the spring clamping shaft.

[0009] The center of the anti-overload protection cover is provided with an axial hole corresponding to the spring clamping shaft, the anti-overload protection cover is also provided with a bracket mounting hole, and the inner side wall of the anti-overload protection cover is provided with a plurality of anti-overload positioning grooves.

[0010] The head end of the spring is clamped between the spring clamping shaft and the arc-shaped positioning block, the spring clamping shaft passes through the shaft hole, and the tail end of the spring is located in the anti-overload positioning groove.

[0011] Furthermore, the anti-overload positioning groove is in the shape of an isosceles trapezoid, and the groove opening is larger than the groove bottom.

[0012] Furthermore, the bracket where the spring spring assembly is mounted is provided with a spring clamping shaft mounting hole and an anti-overload protection cover fixing hole corresponding to the bracket mounting hole;

[0013] The bracket mounting hole is connected to the anti-overload protection cover fixing hole by bolts;

[0014] The spring clamping shaft passes through the spring clamping shaft installation hole, and a clamping pin is installed on the clamping pin installation position to limit the spring clamping shaft on the bracket. There is a gap between the clamping pin and the bracket, and the spring clamping shaft can rotate in the shaft hole and the spring clamping shaft installation hole.

[0015] Furthermore, one end of the travel plate that is engaged with the toothed base is provided with an engaging portion that matches the protruding teeth.

[0016] A limit buckle is provided at the place where the travel plate is installed on the bracket, and the travel plate can move vertically in the limit buckle.

[0017] A pressure plate is provided on the stroke plate, and a limit buckle is located between the pressure plate and the tension wheel. Neither the pressure plate nor the tension wheel can pass through the limit buckle, and the length of the meshing portion is greater than or equal to the moving distance of the tension wheel.

[0018] Furthermore, a travel switch is provided on the bracket, and the travel switch is located on one side of the limit buckle. When the tensioning wheel is farthest from the speed limiter rope wheel, the pressure plate touches the travel switch.

[0019] Furthermore, the tensioning wheel is rotatably connected to the other end of the travel plate through a bearing and a fastening assembly. When the tensioning wheel is closest to the speed limiter rope wheel, the bracket blocks the fastening assembly.

[0020] Furthermore, the tensioning wheel is installed at the lower end of the travel plate.

[0021] Furthermore, the bracket is fixed on the guide rail by pressing.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] The spring-spring design can simplify the structure and reduce costs; the tensioning wheel is installed at the lower end of the stroke plate, and the bracket, stroke plate, spring-spring assembly and other components are mainly in the space above the tensioning wheel, saving space resources; there are several anti-overload positioning grooves, and when the preload force of the spring is too large, the anti-overload positioning groove can be automatically switched to avoid the preload force of the spring being continuously too large, which is beneficial to the maintenance of the device, with good adaptability and stability, and a travel switch can enable the system to prompt maintenance personnel to carry out maintenance in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of the present application, and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 It is a structural schematic diagram of the tensioning wheel in a non-final tensioning position and a final tensioning position;

[0026] Figure 2 1. It is a front view schematic diagram of the installation structure of the tensioning wheel and the spring spring assembly;

[0027] Figure 3 is a rear view schematic diagram of the installation structure of the clockwork spring assembly;

[0028] Figure 4 yes Figure 3 A magnified view of the structure of part A;

[0029] Figure 5 It is a schematic diagram of the structure of the components of the clockwork spring assembly;

[0030] Figure 6 It is an axonometric and cross-sectional view of the mainspring assembly;

[0031] Figure 7 It is a top view of the tension wheel installation structure.

[0032] Speed ​​limiter wire rope 1, speed limiter rope wheel 2, tensioning wheel 3, bearing 31, fastening assembly 32, guide rail 4, bracket 5, limit buckle 51, travel switch 52, pressure code 53, spring spring assembly 6, toothed base 61, protruding tooth 611, spring clamping shaft 612, bayonet mounting position 6121, arc-shaped positioning block 613, bayonet 614, spring spring 62, anti-overload protection cover 63, shaft hole 631, anti-overload positioning groove 632, bracket mounting hole 633, anti-overload protection cover fixing hole 634, travel plate 7, meshing portion 71, pressure plate 72. DETAILED DESCRIPTION

[0033] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0034] like Figure 1-7 As shown, the clockwork spring type tensioning device includes a tensioning wheel 3 connected to the speed limiter rope wheel 2 through the speed limiter wire rope 1, and also includes a bracket 5 installed on the guide rail 4, on which a clockwork spring assembly 6 and a stroke plate 7 that moves in the vertical direction are installed, one end of the stroke plate 7 is meshedly connected to the outer periphery of the clockwork spring assembly 6, and the tensioning wheel 3 is rotatably connected to the other end of the stroke plate 7, and the clockwork spring assembly 6 can move the stroke plate 7 so that the tensioning wheel 3 provides tension for the speed limiter wire rope 1.

[0035] The clockwork spring assembly 6 includes a toothed base 61, a clockwork spring 62 and an anti-overload protection cover 63. The clockwork spring 62 is located in a cavity formed by the toothed base 61 and the anti-overload protection cover 63. One end of the travel plate 7 is meshedly connected to the outer periphery of the toothed base 61.

[0036] The toothed base 61 is provided with a plurality of protruding teeth 611 on its outer periphery, a spring clamping shaft 612 is provided at its center, a clamping pin installation position 6121 is provided on the spring clamping shaft 612, and one or more arc-shaped positioning blocks 613 are provided near the spring clamping shaft 612.

[0037] The center of the anti-overload protection cover 63 is provided with an axis hole 631 corresponding to the spring clamping shaft 612, the anti-overload protection cover 63 is also provided with a bracket mounting hole 633, and the inner side wall of the anti-overload protection cover 63 is provided with a plurality of anti-overload positioning grooves 632.

[0038] The head end of the clockwork spring 62 is clamped between the spring clamping shaft 612 and the arc-shaped positioning block 613 , the spring clamping shaft 612 passes through the shaft hole 631 , and the tail end of the clockwork spring 62 is located in the anti-overload positioning groove 632 .

[0039] The anti-overload positioning groove 632 is in an isosceles trapezoidal shape, and its groove opening is larger than the groove bottom.

[0040] The bracket 5 is provided with a spring shaft mounting hole and an anti-overload protection cover fixing hole 634 corresponding to the bracket mounting hole 633 at the location where the spring assembly 6 is mounted;

[0041] The bracket mounting hole 633 is connected to the anti-overload protection cover fixing hole 634 by bolts;

[0042] The spring clamping shaft 612 passes through the spring clamping shaft installation hole, and the clamping pin 614 is installed on the clamping pin installation position 6121 to limit the spring clamping shaft 612 on the bracket 5. There is a gap between the clamping pin 614 and the bracket 5, and the spring clamping shaft 612 can rotate in the shaft hole 631 and the spring clamping shaft installation hole.

[0043] The end of the travel plate 7 that meshes with the toothed base 61 is provided with a meshing portion 71 that matches the protruding teeth 611.

[0044] A limit buckle 51 is provided at the place where the travel plate 7 is installed on the bracket 5, and the travel plate 7 can move vertically in the limit buckle 51.

[0045] A pressure plate 72 is provided on the travel plate 7, and a limit buckle 51 is located between the pressure plate 72 and the tension wheel 3. The pressure plate 72 and the tension wheel 3 cannot pass through the limit buckle 51, and the length of the meshing portion 71 is greater than or equal to the moving distance of the tension wheel 3.

[0046] The bracket 5 is provided with a travel switch 52 , which is located at one side of the limit buckle 51 . When the tensioning wheel 3 is farthest from the speed governor rope wheel 2 , the pressure plate 72 touches the travel switch 52 .

[0047] The tension wheel 3 is rotatably connected to the other end of the travel plate 7 through a bearing 31 and a fastening assembly 32 . When the tension wheel 3 is closest to the speed limiter rope wheel 2 , the bracket 5 blocks the fastening assembly 32 .

[0048] The tension wheel 3 is installed at the lower end of the travel plate 7.

[0049] The bracket 5 is fixed on the guide rail 4 via a pressing code 53 .

[0050] like Figure 1 As shown, the speed limiter is installed on the bottom plate of the machine room, and the tension wheel 3 is connected to the speed limiter rope wheel 2 through the speed limiter wire rope 1 to realize synchronous operation with the speed limiter rope wheel 2. After the travel plate 7 is pushed upward in the pre-tightening direction, the spring spring 62 is tightened, the tension wheel 3 is closest to the speed limiter rope wheel 2, and the speed limiter wire rope 1 is wound around the tension wheel 3. At this time, the spring spring 62 in the initial stage has a rebound force, and the toothed base 61 has a continuous downward thrust on the travel plate 7.

[0051] When the speed limiter wire rope 1 is relaxed, through the rebound force of the clockwork spring 62 and the limit of the limit buckle 51, the tensioning wheel 3 will move in the vertical direction driven by the travel plate 7 to tension the speed limiter wire rope 1 until the pressure plate 72 presses the travel switch 52, and the entire tensioning process stops. At this time, the tensioning wheel 3 is farthest from the speed limiter rope wheel 2.

[0052] Within the normal load range, the tail end of the clockwork spring 62 is in an anti-overload positioning groove 632 of the anti-overload protection cover 63. When the preload force of the clockwork spring 62 is too large, the outer ring of the clockwork spring 62 will shrink, and its tail end will slip out of the original anti-overload positioning groove 632 and get stuck in the next anti-overload positioning groove 632 to eliminate the excessive preload force and resume the next preload action.

[0053] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A spring-type tensioning device, comprising a tensioning wheel connected to a speed limiter rope wheel through a speed limiter wire rope, characterized in that: It also includes a bracket installed on the guide rail, on which a clockwork spring assembly and a stroke plate that moves in the vertical direction are installed, one end of the stroke plate is meshed and connected to the outer periphery of the clockwork spring assembly, and the tensioning wheel is rotatably connected to the other end of the stroke plate. The clockwork spring assembly can move the stroke plate so that the tensioning wheel provides tension for the speed limiter wire rope.

2. The spring-type tensioning device according to claim 1, characterized in that: The clockwork spring assembly includes a toothed base, a clockwork spring and an anti-overload protection cover. The clockwork spring is located in a cavity formed by the toothed base and the anti-overload protection cover. One end of the travel plate is meshedly connected to the outer periphery of the toothed base.

3. The spring-type tensioning device according to claim 2, characterized in that: The outer periphery of the toothed base is provided with a plurality of protruding teeth, the center of which is provided with a spring clamping shaft, a bayonet mounting position is provided on the spring clamping shaft, and one or more arc-shaped positioning blocks are provided near the spring clamping shaft. The center of the anti-overload protection cover is provided with an axial hole corresponding to the spring clamping shaft, the anti-overload protection cover is also provided with a bracket mounting hole, and the inner side wall of the anti-overload protection cover is provided with a plurality of anti-overload positioning grooves. The head end of the spring is clamped between the spring clamping shaft and the arc-shaped positioning block, the spring clamping shaft passes through the shaft hole, and the tail end of the spring is located in the anti-overload positioning groove.

4. The spring-type tensioning device according to claim 3, characterized in that: The anti-overload positioning groove is in an isosceles trapezoidal shape, and the groove opening is larger than the groove bottom.

5. The spring-type tensioning device according to claim 3, characterized in that: The bracket where the spring spring assembly is mounted is provided with a spring clamping shaft mounting hole and an anti-overload protection cover fixing hole corresponding to the bracket mounting hole; The bracket mounting hole is connected to the anti-overload protection cover fixing hole by bolts; The spring clamping shaft passes through the spring clamping shaft installation hole, and a clamping pin is installed on the clamping pin installation position to limit the spring clamping shaft on the bracket. There is a gap between the clamping pin and the bracket, and the spring clamping shaft can rotate in the shaft hole and the spring clamping shaft installation hole.

6. The spring-type tensioning device according to claim 3, characterized in that: One end of the travel plate that meshes with the toothed base is provided with a meshing portion that matches the protruding teeth. A limit buckle is provided at the place where the travel plate is installed on the bracket, and the travel plate can move vertically in the limit buckle. A pressure plate is provided on the stroke plate, and a limit buckle is located between the pressure plate and the tension wheel. Neither the pressure plate nor the tension wheel can pass through the limit buckle, and the length of the meshing portion is greater than or equal to the moving distance of the tension wheel.

7. The spring-type tensioning device according to claim 6, characterized in that: A travel switch is arranged on the bracket, and the travel switch is located at one side of the limit buckle. When the tensioning wheel is farthest from the speed limiter rope wheel, the pressure plate touches the travel switch.

8. The spring-type tensioning device according to claim 1 or 6, characterized in that: The tensioning wheel is rotatably connected to the other end of the travel plate through a bearing and a fastening assembly. When the tensioning wheel is closest to the speed limiter rope wheel, the bracket blocks the fastening assembly.

9. The spring-type tensioning device according to claim 1, characterized in that: The tensioning wheel is installed at the lower end of the travel plate.

10. The spring-type tensioning device according to claim 1, characterized in that: The bracket is fixed on the guide rail by pressing.

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