A fixed cable reeling device

Abstract

This invention discloses a cable fixing and retraction device, including a car and a cable fixing and retraction device. The cable fixing and retraction device includes: a cable hanging from the upper end and connected to the cable fixing and retraction device at the lower end; a cable retraction device; and a cable fixing device located on the car or an object moving synchronously with the car. The cable changes direction after passing through the cable fixing device and is then connected to the cable retraction device. The cable retraction device is installed on the top of the car. The cable connects directly to the cable retraction device after being connected from the top of the hoistway outside the car to the cable fixing device, reducing the cable suspension length. The traveling cable remains in a taut state, reducing its swaying within the hoistway.

Description

Technical Field

[0001] This invention belongs to the field of elevator technology, specifically relating to a device for fixing and retracting elevator traveling cables. Background Technology

[0002] Currently, the installation method for the traveling cable involves fixing it to a bracket at the top floor, installing a middle bracket for the traveling cable halfway down the shaft, and finally fixing the traveling cable to a bracket at the bottom of the car. Therefore, the lowest part of the traveling cable needs to be suspended in a U-shape. For example, a Chinese patent document, "An Automatic Cable Retraction Device for Elevator Cars," publication number CN207759870U, discloses an automatic cable retraction device located in the middle of the side wall of the elevator car. The automatic cable retraction device includes a drive controller, a connecting rod, and a retraction wheel. The drive controller... The elevator car is connected to the take-up and release wheel via a connecting rod. The take-up and release wheel has a limiting groove for placing the traveling cable. A clamping mechanism for fixing the traveling cable is installed in the limiting groove. When the elevator car is descending, the traveling cable is placed in the limiting groove on the take-up and release wheel. The drive controller releases the take-up and release wheel through the connecting rod, and the clamping mechanism releases the traveling cable. The take-up and release wheel rotates in an undamped state as the traveling cable moves. When the elevator car is ascending, the traveling cable is placed in the limiting groove on the take-up and release wheel. The clamping mechanism clamps and fixes the traveling cable. The drive controller drives the take-up and release wheel to rotate in the opposite direction through the connecting rod, winding the cable into the limiting groove.

[0003] This method of installing the traveling cable has the following disadvantages:

[0004] 1. The traveling cable has only three fixed positions, which means that the traveling cable is freely suspended. This means that the cable is prone to swaying. The amplitude of this swaying will be aggravated by factors such as the elevator's running speed and the cable's own design balance, which can easily cause elevator malfunctions and accidents to passengers on site.

[0005] 2. Because the traveling cable is fixed to the car bottom bracket, on-site personnel must work in the pit when fixing the cable, which increases the difficulty of the work for on-site personnel;

[0006] 3. The traveling cable needs to be fixed from the bottom of the car and then pulled from the bottom of the car to the junction box on the top of the car. This wiring method results in unnecessary waste of the traveling cable. Summary of the Invention

[0007] To overcome the problems of wasted cable length and easy swaying caused by the existing technology's cable retraction device being located at the bottom, the present invention provides a cable fixing and retraction device that sets the cable retraction device at the top of the car. The cable fixing device keeps the cable in a taut state to reduce cable swaying, resulting in more uniform tension on the cable and less damage to the cable. Moreover, no additional power is required during the process.

[0008] The present invention is achieved through the following technical solution: a cable fixing and retraction device, comprising a car and a cable fixing and retraction device, wherein the cable fixing and retraction device comprises: a cable, the upper end of which hangs down and the lower end is connected to the cable fixing and retraction device; a cable retraction device; and a cable fixing device, wherein the cable fixing device is installed on the car or an object moving synchronously with the car, and the cable is connected to the cable retraction device after its direction is changed by the cable fixing device.

[0009] The cable retraction device is installed on the top of the car, so that the cable is connected directly to the cable retraction device after being connected from the top of the hoistway outside the car to the cable fixing device, reducing the cable suspension length; the traveling cable is always in a taut state, reducing the swaying of the traveling cable in the hoistway.

[0010] Preferably, the cable is wound up in a cable winding device, which includes a coil spring disposed inside the cable wound up in the device. The coil spring's contraction causes the wound cable to roll and wind up the cable. The cable winding device is mechanically designed, requires no external power input, is easy to maintain, and is energy-saving and environmentally friendly.

[0011] Preferably, the cable fixing device includes a bracket installed on the car or an object moving synchronously with the car and a roller assembly axially connected to the bracket. The cable is wound around the roller assembly, and the direction of cable movement is changed by the roller assembly.

[0012] Preferably, the cable has a gear groove, and the roller assembly includes a pair of gears that clamp the cable in the middle. When the cable is running, the gears mesh with the gear groove, so that the linear speed of the gears is consistent with the running speed of the elevator, thereby avoiding the cable from slipping and being pulled by the roller assembly during operation and reducing the risk of the cable being pulled off.

[0013] Preferably, a hoistway is provided outside the car, and a vertically arranged gear track is provided on the hoistway. A drive wheel that meshes with one of the gears in the gear set is also provided on the support. The drive wheel meshes with the gear track, and the diameter of the drive wheel is the same as that of the gear it meshes with. The running speed of the car, the cable winding and unwinding speed, and the linear speed of the gear set are all the same. Since the diameter of the drive wheel is the same as that of the gear it meshes with, the linear speed of the drive wheel is also the same as that of the gear set. Therefore, the drive wheel will not obstruct the winding and unwinding of the cable during operation. When the elevator stops, the fixed gear track can limit the rotation of the drive wheel, thereby limiting the rotation of the gear it meshes with, so that the cable cannot move. Therefore, the drive wheel plays a limiting role for the cable when the elevator stops, so that the cable is not stressed at only one point in the cable winding and unwinding device when the elevator stops, reducing the stress concentration of the cable.

[0014] Preferably, a junction box is provided on the top of the car, and the cable passes through the cable retractor and connects to the junction box, thereby reducing the length of the cable used.

[0015] Preferably, the gear set is arranged vertically, with the drive wheel meshing with the gear located below, to avoid interference between the drive wheel and the cable.

[0016] Preferably, the gear set is provided with a clamping device for adjusting the gear spacing in the gear set, and for limiting the cable when the elevator stops.

[0017] Preferably, the cable fixing device includes a protective shell disposed outside the roller assembly, the protective shell having a through hole for exposing the drive wheel, thereby reducing dust accumulation on the entire roller assembly.

[0018] Preferably, the car is provided with guide shoes that move synchronously with the car, and the brackets are set on the guide shoes to reduce the space occupied on the top of the car.

[0019] Compared with the prior art, the advantages of the present invention are:

[0020] The cable retraction device is installed on the top of the car, so that the cable is connected directly to the cable retraction device after being connected from the top of the hoistway outside the car to the cable fixing device, reducing the cable suspension length; the traveling cable is always in a taut state, reducing the swaying of the traveling cable in the hoistway. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0022] Figure 2 for Figure 1 A magnified diagram of point A;

[0023] Figure 3 This is a schematic diagram of the overall situation in Embodiment 2 of the present invention;

[0024] Figure 4 for Figure 3 The enlarged diagram of point B.

[0025] In the diagram: 1. Car; 2. Cable; 3. Hoistway; 31. Gear rail; 4. Cable winding device; 5. Cable fixing device; 51. Bracket; 52. Roller assembly; 521. Gear set; 53. Drive wheel; 54. Gas strut; 6. Junction box. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this invention easier to understand, the following description, in conjunction with the accompanying drawings and specific embodiments, further illustrates how this invention is implemented. It must be noted that the terms "circumferential" and "axial" mentioned below are based on the direction of propeller rotation.

[0027] Example 1, as Figure 1-4 As shown,

[0028] A device for securing and retracting a traveling cable, such as Figure 1 and Figure 2 As shown, the system includes a car 1 and a cable 2. The upper end of the cable 2 is suspended and has a gear groove (not shown in the figure). The car 1 runs in a hoistway 3, which is equipped with vertically arranged gear tracks 31. Additionally, it includes:

[0029] The cable winding device 4 includes a coil spring (not shown in the figure) disposed inside the cable 2 which is wound within the cable winding device 4. The cable 2 is wound up by the contraction of the coil spring. The cable winding device 4 can be configured as in this embodiment. Figure 1 and Figure 2 The shown is located on the top of the car, or it can be installed inside the hoistway for easy maintenance.

[0030] Cable fixing device 5, the cable fixing device 55 is set on the top of the car 1 and located directly below the hanging part of the cable 2. After passing through the cable fixing device 55, the cable 2 changes direction and is connected to the cable winding and unwinding device 4.

[0031] The cable fixing device 5 includes a bracket 51 set on the top of the car 1 and a roller assembly 52 that is axially rolled on the bracket 51. The cable 2 is wound around the roller assembly 52, and the direction of movement of the cable 2 is changed by the roller assembly 52.

[0032] The roller assembly 52 includes a pair of gear sets 521 that clamp the cable 2 in the middle. The gear sets 521 are arranged vertically, and the gear sets 521 mesh with the gear slots when the cable 2 is running.

[0033] The bracket 51 is also provided with a drive wheel 53 that meshes with the gear located below in the gear set 521. The drive wheel 53 is in rolling connection with the bracket 51 and meshes with the gear track 31. The diameter of the drive wheel 53 is the same as that of the gear it meshes with.

[0034] The running speed of the car 1, the winding and unwinding speed of the cable 2, and the linear speed of the gear set 521 are all the same. Since the diameter of the drive wheel 53 is the same as that of the gear it meshes with, the linear speed of the drive wheel 53 is also the same as that of the gear set 521. Therefore, the drive wheel 53 will not obstruct the winding and unwinding of the cable 2 during operation. When the car 1 stops running, the fixed gear track 31 restricts the rotation of the drive wheel 53, thereby restricting the rotation of the gear meshing with it, and thus the cable 2 cannot move. Therefore, the drive wheel 53 acts as a limiter for the cable 2 when the elevator stops, so that the cable 2 is not subjected to force at only one point, the cable retraction device 4, reducing stress concentration on the cable 2. When the car 1 moves upward, the cable 2 is retracted and shortened under the force of the coil spring. On the other hand, the bracket 51 on the car 1 drives the drive wheel 53 to move upward. The drive wheel 53 drives the lower gear in the gear set 521 to rotate, thereby driving the cable 2 to move in the retraction direction. When the car 1 moves downward, the bracket 51 on the car 1 drives the drive wheel 53 to move downward. The drive wheel 53 drives the lower gear in the gear set 521 to rotate, thereby driving the cable 2 to move in the stretching direction. That is, the car 1 extends in the direction of movement of the cable 2.

[0035] Therefore, the setting of the drive wheel 53 makes the tensioning process of the cable 2 subject to force through gear meshing, that is, along the hanging direction of the cable 2, the tension force on the cable 2 is more uniform, the damage to the cable 2 is less, and no additional power is required in the process.

[0036] A junction box 6 is installed on the top of the car 1. The cable 2 passes through the cable retractor 4 and connects to the junction box 6, reducing the length of the cable 2. The cable fixing device 5 includes a protective shell (not shown in the figure) installed outside the roller assembly 52. ​​The protective shell has a through hole for exposing the drive wheel 53, reducing dust accumulation on the entire roller assembly 52.

[0037] The beneficial effects of this embodiment include:

[0038] The cable retraction device 4 is installed on the top of the car 1, so that the cable 2, after being connected from the top of the hoistway 3 outside the car 1 to the cable fixing device 55, is directly connected to the cable retraction device 4, reducing the suspension length of the cable 2. The cable fixing device 55 is installed on the top of the car 1 and is located directly below the hanging part of the cable 2, so that the traveling cable 2 is always in a taut state, reducing the swaying of the traveling cable 2 in the hoistway 3. Both the cable retraction device 4 and the cable fixing device 55 adopt a mechanical design, which does not require external power input, reduces the risk of electric shock during maintenance, is convenient to maintain, and is energy-saving and environmentally friendly.

[0039] Example 2, as Figure 3 and Figure 4As shown, the difference from Embodiment 1 is that a guide shoe (not shown in the figure) that moves synchronously with the car is provided outside the car. The bracket 51 is set on the guide shoe. The bracket 51 does not have a drive wheel 53. Instead, a clamping device for adjusting the gear spacing in the gear set 521 is provided on the gear set 521. The clamping device includes a gas strut 54 with both ends connected to the shaft of the gear set 521. When the elevator stops, the gas strut 54 drives the upper gear to move downward to clamp the cable 2 and limit the cable 2.

Claims

1. A cable-locking and retracting device, comprising a car and a cable-locking and retracting device, characterized in that, The shaft is equipped with vertically arranged gear tracks, and the cable fixing and retraction device includes: A cable, the upper end of which hangs down and has a gear groove, and the lower end is connected to a cable fixing and winding device; Cable retraction device; A cable fixing device is installed on the car or an object that moves synchronously with the car. The cable changes direction after passing through the cable fixing device and is connected to the cable winding and unwinding device. The cable fixing device includes a bracket on the top of the car and a roller assembly that is axially and rollingly connected to the bracket. The roller assembly includes a pair of gear sets that clamp the cable in the middle. The gear sets are arranged vertically, and the gear sets mesh with the gear grooves when the cable is running. The bracket is provided with a drive wheel that meshes with the gears of the gear set. The drive wheel is axially connected to the bracket and meshes with the gear track.

2. The cable-laying and retracting device according to claim 1, characterized in that: The cable is wound up in a cable winding device, which includes a coil spring disposed on the inner coil of the wound cable.

3. The cable-laying and retracting device according to claim 1 or 2, characterized in that: The cable is wound around the roller assembly.

4. The cable-laying and retracting device according to claim 1 or 2, characterized in that: A shaft is provided outside the car, and the diameter of the drive wheel is the same as that of the gear meshing with it.

5. The cable-laying and retracting device according to claim 1 or 2, characterized in that: A junction box is installed on the top of the car, and the cable passes through the cable retraction device and connects to the junction box.

6. The cable-laying and retracting device according to claim 4, characterized in that: The drive wheel meshes with the gear located below it.

7. A fixed cable pay-off unit according to claim 1 or 2, characterised in that: The gear set is equipped with a clamping device for adjusting the gear spacing in the gear set.

8. A fixed cable pay-off unit according to claim 3, wherein: The cable fixing device includes a protective shell disposed outside the roller assembly.

9. A fixed cable pay-off device according to claim 1 or 2, characterised in that: The car is equipped with guide shoes that move synchronously with the car, and the brackets are mounted on the guide shoes.

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