Anti-reversion device for main traction step chain

Abstract

The utility model relates to the technical field of escalator chains, and provides a main traction step chain anti-reversion device which comprises a rotating wheel, a step chain is installed on the rotating wheel, a driving shaft is installed at one end of the rotating wheel, one end of the driving shaft is connected with the output end of a driving motor, and a rotating shaft is installed at the other end of the driving shaft. A dustproof structure is arranged on the rotating shaft, an anti-reversion assembly is arranged at one end of the rotating shaft, the anti-reversion assembly is installed in the protective shell, and a fixing shaft is installed at one end in the protective shell. By means of the arranged lubricating structure, when the second cylinder rotates, the teeth make contact with the valve element, the valve element is pushed to move in the direction close to the support, the oil outlet is exposed, lubricating oil in the lubricating box flows out through the oil outlet and drips on the teeth, the lubricating purpose is achieved, friction between the teeth and the ratchet strips is reduced, and the service life of the ratchet strips is prolonged. And the condition that the ratchet strips are seriously abraded due to the fact that friction force between the ratchet strips and the teeth is too large is avoided.

Description

Technical Field

[0001] This utility model relates to the field of escalator chain technology, and in particular to a main traction step chain anti-reverse device. Background Technology

[0002] Escalators are fixed, electrically driven devices with circulating steps used to transport passengers upwards or downwards at an incline. Their main components include steps, traction chains and sprockets, guide rail systems, and main drive systems. There are many types of traction chains, including circular, plate, detachable, and special traction chains. When escalators are in operation, they need to be equipped with anti-reverse devices.

[0003] To address this, patent CN213387368U discloses an escalator anti-reverse protection device, belonging to the technical field of escalator-related equipment. It includes a housing, a conveying mechanism located inside the housing, and an anti-reverse device located on one side of the conveying mechanism. The conveying mechanism includes a wheel disposed inside the housing, a ladder chain sleeved on the outer side of the wheel, a rotating shaft fixedly disposed on one side of the wheel, a motor fixedly installed on the inner wall of the housing, and the end of the rotating shaft away from the wheel fixedly connected to the output end of the motor. The anti-reverse device includes a cylinder fixedly disposed on the inner wall of the housing, and a rotating shaft two fixedly disposed on the end of the wheel away from the rotating shaft one. The technical problem to be solved by this invention is to provide an escalator anti-reverse protection device that can ensure the normal forward rotation of the escalator and, at the same time, can promptly and accurately shut down the escalator when it reverses. It has a simple structure and a long service life.

[0004] Existing anti-reverse devices typically use a ratchet stop to prevent reversal. However, during use, the excessive friction between the ratchet and the teeth can lead to severe wear and affect the lifespan of both the ratchet and the teeth. Utility Model Content

[0005] The purpose of this invention is to provide a main traction ladder chain anti-reverse device to solve the defect that the ratchet of an existing main traction ladder chain anti-reverse device is prone to severe wear.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a main traction ladder chain anti-reverse device, including a wheel, a ladder chain installed on the wheel, a drive shaft installed at one end of the wheel, and one end of the drive shaft connected to the output end of a drive motor, a rotating shaft installed at the other end of the drive shaft, a dustproof structure provided on the rotating shaft, an anti-reverse component provided at one end of the rotating shaft, the anti-reverse component being installed inside a protective shell, a fixed shaft installed at one end inside the protective shell, a disassembly and assembly structure provided between the fixed shaft and the anti-reverse component, the anti-reverse component including a second cylinder installed at one end of the rotating shaft and a first cylinder installed at one end of the fixed shaft, a lubrication structure provided at the bottom of one end of the first cylinder, the lubrication structure including a lubrication box installed at the bottom of one end of the first cylinder, a sealing plug installed at the top of the lubrication box, an oil outlet at the bottom of the lubrication box, a bracket installed inside the lubrication box, a limiting rod installed on the bracket, a limiting spring sleeved on the limiting rod, and a valve core installed at the bottom of the limiting rod.

[0007] Preferably, the dustproof structure includes a first dustproof ring, a first positioning groove, a second positioning groove, and a second dustproof ring. The first dustproof ring is mounted on the rotating shaft, and a second dustproof ring is installed at one end of the first dustproof ring. A first positioning groove that mates with the first dustproof ring is formed on the inner wall of one end of the protective shell, and a second positioning groove is formed on the inner wall of the protective shell at one end of the first positioning groove.

[0008] The above structure improves the sealing between the shaft and the protective shell, thus achieving dust prevention.

[0009] Preferably, the diameter of the first positioning groove is greater than the diameter of the second positioning groove, and the diameter of the first dustproof ring is greater than the diameter of the second dustproof ring.

[0010] With the above structure, the first dustproof ring enters the first positioning groove and the second dustproof ring enters the second positioning groove, which can improve the dustproof effect.

[0011] Preferably, the anti-reverse component further includes teeth evenly arranged inside the second cylinder, limiting grooves formed on both sides of one end of the first cylinder, a ratchet hinged inside the limiting groove, and a telescopic spring installed between the ratchet and the limiting groove.

[0012] The above structure can play a certain role in preventing the ladder chain from reversing.

[0013] Preferably, the bottom end of the limiting spring is connected to the top end of the valve core, and the limiting spring and the valve core form a telescopic structure.

[0014] The above structure facilitates the return of the valve core to its initial position.

[0015] Preferably, the disassembly and assembly structure includes a fixing ring, a locking block, a connecting ring, fixing bolts, and a locking groove. The fixing ring is mounted on a fixing shaft, and locking blocks are evenly installed on one end of the fixing ring. The connecting ring is mounted on the other end of the first cylinder, and fixing bolts are evenly installed on the connecting ring. The connecting ring has locking grooves evenly opened inside.

[0016] The above structure allows the first cylinder to be disassembled for replacement and repair.

[0017] Preferably, the card block and the card slot cooperate to form an engaging structure.

[0018] The above structure can limit the movement of the connecting ring and improve the stability of the first cylinder installation.

[0019] The main traction ladder chain anti-reverse device provided by this utility model has the following advantages:

[0020] The anti-reverse component can prevent the ladder chain from reversing to a certain extent. The lubrication structure can lubricate the anti-reverse component, reduce the friction between the teeth and the ratchet, and avoid the ratchet from being severely worn due to excessive friction between the ratchet and the teeth. The dustproof structure can improve the sealing between the shaft and the protective shell. The disassembly structure can remove the first cylinder for replacement and maintenance.

[0021] With the lubrication structure in place, when the second cylinder rotates, the teeth contact the valve core, pushing the valve core to move closer to the bracket, exposing the oil outlet. The lubricating oil in the lubrication box flows out through the oil outlet and drips onto the teeth, achieving the purpose of lubrication, reducing the friction between the teeth and the ratchet, and avoiding the situation where the ratchet is severely worn due to excessive friction between the ratchet and the teeth.

[0022] By setting up a dustproof structure, the cooperation between the first dustproof ring and the second dustproof ring can improve the sealing between the rotating shaft and the protective shell, achieve the purpose of dust prevention, and prevent dust from entering the protective shell from the gap between the rotating shaft and the protective shell, thus affecting the performance of the anti-reverse component.

[0023] By using the designed disassembly and assembly structure, the fixing bolts can be unscrewed to release the fixing restriction on the connecting ring. The first cylinder can then be moved, the locking block can be disassembled from the slot, and the fixing restriction on the first cylinder can be released, thus achieving the purpose of disassembly for replacement and maintenance. Attached Figure Description

[0024] Figure 1 This is a front view structural diagram of the present utility model;

[0025] Figure 2 This is a front view cross-sectional structural diagram of the anti-reverse component of this utility model;

[0026] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0027] Figure 4 This is a front view schematic diagram of the dustproof structure of this utility model;

[0028] Figure 5 This is a front view schematic diagram of the disassembly and assembly structure of this utility model.

[0029] The following are the annotations in the figure: 1. Drive motor; 2. Drive shaft; 3. Rotary wheel; 4. Rotary shaft; 5. Protective shell; 6. Dustproof structure; 601. First dustproof ring; 602. First positioning groove; 603. Second positioning groove; 604. Second dustproof ring; 7. Ladder chain; 8. Anti-reverse assembly; 801. First cylinder; 802. Ratchet; 803. Limiting groove; 804. Telescopic spring; 805. Tooth; 806. Second cylinder; 9. Lubrication structure; 901. Lubrication box; 902. Oil outlet; 903. Valve core; 904. Limiting spring; 905. Limiting rod; 906. Bracket; 907. Sealing plug; 10. Fixed shaft; 11. Disassembly and assembly structure; 1101. Fixed ring; 1102. Locking block; 1103. Connecting ring; 1104. Fixing bolt; 1105. Locking groove. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figures 1-5 The present invention provides a main traction ladder chain anti-reverse device, including a wheel 3.

[0032] Reference Figures 1-5 As shown, a ladder chain 7 is installed on the rotating wheel 3, and a drive shaft 2 is installed on one end of the rotating wheel 3. One end of the drive shaft 2 is connected to the output end of the drive motor 1. An anti-reverse component 8 is provided on one end of the rotating shaft 4. The anti-reverse component 8 is installed inside the protective shell 5. The anti-reverse component 8 includes a second cylinder 806 installed on one end of the rotating shaft 4 and a first cylinder 801 installed on one end of the fixed shaft 10. The anti-reverse component 8 also includes teeth 805 evenly arranged inside the second cylinder 806, a limiting groove 803 opened on both sides of one end of the first cylinder 801, a ratchet 802 hinged inside the limiting groove 803, and a telescopic spring 804 installed between the ratchet 802 and the limiting groove 803 for pushing the ratchet 802 back to the initial position.

[0033] A lubrication structure 9 is provided at the bottom of one end of the first cylinder 801. The lubrication structure 9 includes a lubrication box 901 installed at the bottom of one end of the first cylinder 801, a sealing plug 907 installed at the top of the lubrication box 901, an oil outlet 902 at the bottom of the lubrication box 901, a bracket 906 installed inside the lubrication box 901, a limiting rod 905 installed on the bracket 906, a limiting spring 904 sleeved on the limiting rod 905, and a valve core 903 installed at the bottom of the limiting rod 905. The bottom end of the limiting spring 904 is connected to the top end of the valve core 903. The limiting spring 904 and the valve core 903 form a telescopic structure to push the valve core 903 back to the initial position.

[0034] When the escalator is running normally, drive motor 1 rotates forward, and pulley 3 drives the chain 7 to rotate. At the same time, shaft 4 drives second cylinder 806 to rotate forward. Teeth 805 push ratchet 802 to move into the limiting groove 803, thus failing to limit the second cylinder 806. When drive motor 1 rotates in reverse, shaft 4 drives second cylinder 806 in reverse. Extension spring 804 pushes ratchet 802 away from the limiting groove 803. Racket 802 gets into the groove between teeth 805, limiting the second cylinder 806 and preventing it from rotating normally. At the same time, it sends a signal to the microcontroller. When the microcontroller processes the information, it sends it to the drive motor 1, which then shuts off to prevent reverse rotation. When the second cylinder 806 rotates, the teeth 805 contact the valve core 903, pushing the valve core 903 towards the support 906, exposing the oil outlet 902. The lubricating oil in the lubrication box 901 flows out through the oil outlet 902 and drips onto the teeth 805 for lubrication, reducing friction between the teeth 805 and the ratchet 802 and preventing severe wear of the ratchet 802 due to excessive friction between the ratchet 802 and the teeth 805.

[0035] Reference Figure 1 and Figure 4 As shown, a rotating shaft 4 is installed at the other end of the drive shaft 2. A dustproof structure 6 is provided on the rotating shaft 4. The dustproof structure 6 includes a first dustproof ring 601, a first positioning groove 602, a second positioning groove 603, and a second dustproof ring 604. The first dustproof ring 601 is installed on the rotating shaft 4. The second dustproof ring 604 is installed at one end of the first dustproof ring 601. A first positioning groove 602 that cooperates with the first dustproof ring 601 is opened on the inner wall of one end of the protective shell 5. A second positioning groove 603 is opened on the inner wall of the protective shell 5 at one end of the first positioning groove 602. The diameter of the first positioning groove 602 is larger than the diameter of the second positioning groove 603. The diameter of the first dustproof ring 601 is larger than the diameter of the second dustproof ring 604.

[0036] The second dustproof ring 604 enters the second positioning groove 603 and the first dustproof ring 601 enters the first positioning groove 602. Without affecting the operation of the rotating shaft 4, the cooperation between the first dustproof ring 601 and the second dustproof ring 604 can improve the sealing between the rotating shaft 4 and the protective shell 5, and prevent dust from entering the protective shell 5 from the gap between the rotating shaft 4 and the protective shell 5, thus affecting the performance of the anti-reverse component 8.

[0037] Reference Figure 5 As shown, a fixed shaft 10 is installed at one end inside the protective shell 5. A disassembly and assembly structure 11 is provided between the fixed shaft 10 and the anti-reverse assembly 8. The disassembly and assembly structure 11 includes a fixed ring 1101, a locking block 1102, a connecting ring 1103, a fixing bolt 1104, and a slot 1105. The fixed ring 1101 is installed on the fixed shaft 10. The locking block 1102 is evenly installed at one end of the fixed ring 1101. The connecting ring 1103 is installed at the other end of the first cylinder 801. The fixing bolt 1104 is evenly installed on the connecting ring 1103. The slot 1105 is evenly opened inside the connecting ring 1103. The locking block 1102 and the slot 1105 cooperate to form a locking structure.

[0038] Align the locking block 1102 with the slot 1105, push the first cylinder 801, the locking block 1102 enters the slot 1105 and engages with it, the connecting ring 1103 contacts the fixing ring 1101, tighten the fixing bolt 1104 to fix the first cylinder 801 and complete its installation, unscrew the fixing bolt 1104 to release the fixing restriction on the connecting ring 1103, move the first cylinder 801, the locking block 1102 exits the slot 1105, release the fixing restriction on the first cylinder 801, and achieve its disassembly purpose for replacement and maintenance.

[0039] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A main traction ladder chain anti-reverse device, comprising a wheel (3); Its features are: A ladder chain (7) is installed on the wheel (3). A drive shaft (2) is installed on one end of the wheel (3), and one end of the drive shaft (2) is connected to the output end of the drive motor (1). A rotating shaft (4) is installed on the other end of the drive shaft (2), and a dustproof structure (6) is provided on the rotating shaft (4). An anti-reverse component (8) is provided at one end of the rotating shaft (4). The anti-reverse component (8) is installed inside the protective shell (5). A fixed shaft (10) is installed at one end inside the protective shell (5). A disassembly structure (11) is provided between the fixed shaft (10) and the anti-reverse component (8). The anti-reverse component (8) includes a second cylinder (806) installed on one end of the rotating shaft (4) and a first cylinder (801) installed on one end of the fixed shaft (10). A lubrication structure (9) is provided at the bottom of one end of the first cylinder (801). The lubrication structure (9) includes a lubrication box (901) installed at the bottom of one end of the first cylinder (801), a sealing plug (907) installed at the top of the lubrication box (901), an oil outlet (902) opened at the bottom of the lubrication box (901), a bracket (906) installed inside the lubrication box (901), a limiting rod (905) installed on the bracket (906), a limiting spring (904) sleeved on the limiting rod (905), and a valve core (903) installed at the bottom of the limiting rod (905).

2. The main traction ladder chain anti-reverse device according to claim 1, characterized in that: The dustproof structure (6) includes a first dustproof ring (601), a first positioning groove (602), a second positioning groove (603), and a second dustproof ring (604). The first dustproof ring (601) is mounted on the rotating shaft (4), and the second dustproof ring (604) is installed at one end of the first dustproof ring (601). A first positioning groove (602) that cooperates with the first dustproof ring (601) is opened on the inner wall of one end of the protective shell (5), and a second positioning groove (603) is opened on the inner wall of the protective shell (5) at one end of the first positioning groove (602).

3. The main traction ladder chain anti-reverse device according to claim 2, characterized in that: The diameter of the first positioning groove (602) is greater than the diameter of the second positioning groove (603), and the diameter of the first dustproof ring (601) is greater than the diameter of the second dustproof ring (604).

4. The main traction ladder chain anti-reverse device according to claim 1, characterized in that: The anti-reverse component (8) further includes teeth (805) evenly arranged inside the second cylinder (806), limiting grooves (803) opened on both sides of one end of the first cylinder (801), a ratchet (802) hinged inside the limiting groove (803), and a telescopic spring (804) installed between the ratchet (802) and the limiting groove (803).

5. The main traction ladder chain anti-reverse device according to claim 1, characterized in that: The bottom end of the limiting spring (904) is connected to the top end of the valve core (903), and the limiting spring (904) and the valve core (903) form a telescopic structure.

6. The main traction ladder chain anti-reverse device according to claim 1, characterized in that: The disassembly and assembly structure (11) includes a fixing ring (1101), a locking block (1102), a connecting ring (1103), a fixing bolt (1104), and a slot (1105). The fixing ring (1101) is installed on the fixing shaft (10). The locking block (1102) is evenly installed on one end of the fixing ring (1101). The connecting ring (1103) is installed on the other end of the first cylinder (801). The fixing bolt (1104) is evenly installed on the connecting ring (1103). The slot (1105) is evenly opened inside the connecting ring (1103).

7. The main traction ladder chain anti-reverse device according to claim 6, characterized in that: The card block (1102) cooperates with the card slot (1105), and the card block (1102) and the card slot (1105) form a locking structure.

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