Anti-loose mechanism of elevator

Abstract

The application provides a loosening-preventing mechanism of a hoist, and belongs to the technical field of hoists. The problem of how to avoid the insufficient sensitivity of the loosening-preventing effect when there is no weight at one end, thereby reducing the service life of the hoist, is solved. The loosening-preventing mechanism comprises a shell and a rotating assembly in the shell. The shell is connected with a micro switch electrically connected with the rotating assembly. The shell is provided with a fixed bearing. The shell and one end of the rotating assembly are connected through the fixed bearing. The rotating assembly and the shell can rotate relative to each other. The rotating assembly is provided with an inner connecting shaft. The inner connecting shaft is fixedly connected with a loosening-preventing baffle capable of reciprocating. The loosening-preventing baffle is connected with the shell through a tension spring. The loosening-preventing baffle can contact the micro switch. The outer circumferential surface of the inner connecting shaft and the shell are rotatably connected through a loosening-preventing bearing. The inner connecting shaft and the shell can rotate relative to each other. The inner connecting shaft fixedly connected with the rotating assembly and the loosening-preventing baffle are connected with the shell through the tension spring, thereby solving the above problem.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of hoist, in particular to a kind of anti-loose mechanism of hoist. BACKGROUND

[0002] Hoist is large mechanical equipment for transporting by changing potential energy, such as mine hoist, dam hoist, etc. But in the prior art, one end of the steel wire rope of the hoist is wound in the grooved wire storage bin, and the other end is connected with the workpiece. When there is no workpiece or the workpiece is too light, the steel wire rope will not be under the force of gravity. At this time, if the hoist continues to run, the steel wire rope in the wire storage bin will run out of the wire groove, causing the steel wire rope to be tangled and eventually affecting the service function and life of the hoist steel wire rope, and thus affecting the service function and life of the steel wire rope.

[0003] To solve the above problems, the prior art provides an anti-loose hoist, which comprises a servo motor, a speed reducer and a roller. A limiting device is arranged at one end of the roller, and a plurality of guide roller sliding rods are arranged on the limiting device. A guide block is slidably connected above. Under the condition of no force, the elastic potential energy of the tension spring drives the swing arm to rotate around the hinge, and contacts the anti-loose limiting switch to stop working. However, due to the insufficient sensitivity of the anti-loose effect, the service life of the hoist is reduced, and a heavy object needs to be hung at one end of the steel wire rope. SUMMARY

[0004] The present application aims to solve the above problems of the prior art and provides an anti-loose mechanism for hoist. The technical problem to be solved by the present application is how to avoid the reduction of service life of the hoist due to the insufficient sensitivity of the anti-loose effect when there is no heavy object at one end.

[0005] The purpose of the present application can be achieved by the following technical scheme: an anti-loose mechanism for hoist, comprising a housing and a rotating assembly located in the housing. A micro switch electrically connected to the rotating assembly is connected to the housing. A fixed bearing is provided in the housing. The housing is connected to one end of the rotating assembly through the fixed bearing, and the rotating assembly and the housing can rotate relative to each other. An inner connecting shaft is provided on the rotating assembly. A reciprocating anti-loose baffle is fixedly connected to the inner connecting shaft. The anti-loose baffle is connected to the housing by a tension spring, and the anti-loose baffle can contact the micro switch. The outer periphery of the inner connecting shaft and the housing are rotatably connected by an anti-loose bearing, and the inner connecting shaft and the housing can rotate relative to each other.

[0006] This design primarily involves connecting a rotating assembly to a housing fitted around it via a fixed bearing. This allows the rotating assembly to rotate relative to the housing. The rotating assembly has an inner connecting shaft, on which a locking baffle is fixedly attached, contacting a microswitch. To prevent the housing from rotating along with the inner connecting shaft, a locking bearing connected to the housing is fitted on the outer circumference of the connecting shaft. When the rotating assembly rotates relative to the housing, the inner connecting shaft and the locking baffle rotate together with the rotating assembly, causing the locking baffle to contact the microswitch fixed to the housing. The microswitch controls the start and stop of the rotating device. During use, if the rotating assembly experiences relative rotational displacement, the locking baffle on the inner connecting shaft will contact the microswitch, converting the potential energy of the rotating assembly's rotation into an electrical signal, thus controlling the start and stop of the rotating assembly.

[0007] In the anti-loosening mechanism of the aforementioned hoist, the micro switch is fixedly connected to the housing via a lower retaining ring seat, and an upper retaining ring seat is also fixedly connected to the housing. Each of the upper and lower retaining ring seats has two opposing limiting screws. By providing upper and lower retaining ring seats on the housing and setting limiting screws on them, the range of motion can be adjusted by adjusting the limiting screws.

[0008] In the anti-loosening mechanism of the aforementioned hoist, the limiting part on the anti-loosening baffle can contact the end faces of the two limiting screws. Because the limiting part of the anti-loosening baffle contacts the end faces of the two limiting screws, overtravel caused by excessive rotation of the rotating assembly is avoided.

[0009] In the anti-loosening mechanism of the aforementioned hoist, one of the limiting screws is located on one side of the upper retaining ring seat, and an obstacle avoidance switch is provided on the other side of the upper retaining ring seat.

[0010] In the anti-loosening mechanism of the aforementioned hoist, an inverted trapezoidal block is provided on the anti-loosening baffle, and the end face of the inverted trapezoidal block contacts the micro switch. By providing an inverted trapezoidal block on the anti-loosening baffle, damage caused by prolonged operation due to constant contact with the micro switch is avoided during reciprocating swing.

[0011] In the anti-loosening mechanism of the aforementioned hoist, the rotating assembly includes a drive motor connected to a micro switch, a reducer, and a wire drum fixed to one end of the reducer. The wire drum and the reducer are connected by an auxiliary bearing sleeved on the reducer. By adding an auxiliary bearing to the reducer and the wire drum, the connection between the reducer and the wire drum is prevented from breaking during rotation due to the absence of an auxiliary bearing.

[0012] In the anti-loosening mechanism of the aforementioned hoist, one end of the reducer is fixedly connected to the wire drum through a wire drum cover, and the wire drum cover is connected to the housing through a fixed bearing.

[0013] In the anti-loosening mechanism of the elevator, the inner connecting shaft is located between the driving machine and the speed reducer, and the inner connecting shaft, the driving machine and the speed reducer are fixedly connected.

[0014] Compared with the prior art, the present application has the following advantages:

[0015] 1. The present application mainly consists of a shell and a rotating assembly, and the rotating assembly can rotate relative to the shell through the fixed bearing. Since the anti-loosening baffle fixedly connected to the inner connecting shaft is connected to the shell through a tension spring, the anti-loosening baffle can reciprocate in the direction of the rotating assembly during the relative rotation of the rotating assembly, and contact the micro switch during the reciprocation to control the start and stop of the driving machine. By applying a force in a certain direction to the rotating assembly and contacting the micro switch, the start and stop of the micro switch in the rotating assembly can be controlled, thereby solving the problem of how to avoid the insufficient sensitivity of the anti-loosening effect when there is no weight at one end, thereby reducing the service life of the elevator.

[0016] 2. The present application further provides an upper and lower baffle seat on the shell, and two limit screws are arranged on the upper and lower baffle seats, and the limit screws contact the limiting portion on the anti-loosening baffle, thereby limiting the swing range of the anti-loosening baffle within the distance formed by the two limit screws, avoiding the failure of the tension spring due to excessive swing of the anti-loosening baffle during use, and the swing stroke of the anti-loosening baffle can be controlled by adjusting the distance between the limit screws.

[0017] 3. The rotating assembly in the present application mainly consists of a driving machine, a speed reducer and a steel wire drum. In order to ensure the normal operation of the elevator, the speed reducer and the steel wire drum are fixedly connected through the steel wire drum cover, and an auxiliary bearing is provided on the outer periphery of the speed reducer. The auxiliary bearing ensures that the rotation centers of the steel wire drum and the speed reducer always coincide, and avoids the relative rotation of the driving machine and the speed reducer connected to the inner connecting shaft, which affects the steel wire drum. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is a perspective structural schematic diagram of the present application;

[0019] Fig. 2 is a perspective exploded structural schematic diagram of the present application

[0020] Fig. 3 is a left view schematic diagram of the present application;

[0021] In the diagram: 1. Housing; 1a. Lower retaining ring seat; 1b. Upper retaining ring seat; 1b1. Obstacle avoidance switch; 1c. Limit screw; 2. Rotating assembly; 2a. Drive motor; 2b. Reducer; 2c. Wire drum; 2c1. Wire drum cover; 3. Micro switch; 4. Fixed bearing; 5. Inner connecting shaft; 6. Anti-loosening baffle; 6a. Limiting part; 6b. Inverted trapezoidal block; 7. Tension spring; 8. Anti-loosening bearing; 9. Auxiliary bearing; Detailed Implementation

[0022] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0023] Example 1

[0024] like Figs. 1 to 3 As shown, an anti-loosening mechanism for a hoist includes a housing 1 and a rotating assembly 2 located inside the housing 1. A micro switch 3 electrically connected to the rotating assembly 2 is mounted on the housing 1. The rotating assembly 2 includes a drive motor 2a connected to the micro switch 3, a reducer 2b, and a wire drum 2c fixedly connected to one end of the reducer 2b. The wire drum 2c is connected to the reducer 2b via an auxiliary bearing 9 sleeved on the reducer 2b and a wire drum cover 2c. A fixed bearing 4 is provided inside the housing 1. The wire drum cover 2c on the rotating assembly 2 is connected to the housing 1 via the fixed bearing 4, and the rotating assembly 2 and the housing 1 can rotate relative to each other. An internal connection is fixed between the drive motor 2a and the reducer 2b. Connecting shaft 5, an anti-loosening baffle 6 that can reciprocate is fixedly connected to the inner connecting shaft 5. The anti-loosening baffle 6 is connected to the housing 1 through a tension spring 7, and the anti-loosening baffle 6 can contact the micro switch 3. The outer peripheral surface of the inner connecting shaft 5 is rotatably connected to the housing 1 through an anti-loosening bearing 8, and the inner connecting shaft 5 and the housing 1 can rotate relative to each other. The micro switch 3 is fixedly connected to the housing 1 through a lower retaining ring seat 1a, and an upper retaining ring seat 1b is also fixedly connected to the housing 1. The upper retaining ring seat 1b and the lower retaining ring seat 1a are respectively provided with two opposing limiting screws 1c. The limiting part 6a on the anti-loosening baffle 6 can contact the end faces of the two limiting screws 1c, and an obstacle avoidance switch 1b1 is provided on the other side of the upper retaining ring seat 1b.

[0025] The present scheme is mainly composed of a rotating assembly 2 and a shell 1. The output shaft of the driving machine 2a in the rotating assembly 2 drives the steel wire drum 2c to rotate through the speed reducer 2b, so that the steel wire rope wound on the steel wire drum 2c is slowly lowered. The steel wire drum 2c is connected with the speed reducer 2b through the steel wire drum cover 2c, and the steel wire drum cover 2c is connected with the shell 1 through the fixed bearing 4. The anti-loose bearing 8 and the fixed bearing 4 are arranged on both sides of the shell 1, which ensures the coincidence of the rotation center. When the steel wire rope is subjected to downward force, the rotating assembly 2 is affected by the steel wire rope and rotates, and the anti-loose baffle 6 fixed on the inner connecting shaft 5 also rotates and moves with the rotating assembly 2, and the inverted trapezoidal block 6b on the anti-loose baffle 6 is separated from the micro switch 3, so that the driving machine 2a works normally. When the end of the steel wire rope is subjected to upward force or the weight at the end of the steel wire rope is removed, the inner connecting shaft 5 is located between the speed reducer 2b and the driving machine 2a in the rotating assembly 2 and is fixedly connected, and the anti-loose baffle 6 capable of contacting the micro switch 3 is arranged on the inner connecting shaft 5, and the anti-loose baffle 6 is connected with the shell 1 through the anti-loose bearing 8 on the outer circumferential surface of the inner connecting shaft 5. Therefore, the inner connecting shaft 5 and the rotating assembly 2 are pulled back to rotate by the pull spring 7 connected with the anti-loose bearing 8, and the bottom of the inverted trapezoidal block 6b on the anti-loose baffle 6 contacts the micro switch 3, so that the micro switch 3 stops working and realizes anti-loose stop. The technical problem of how to avoid the anti-loose effect being not sensitive when there is no weight at one end and reduce the service life of the hoist is solved. The outer circumferential surface of the speed reducer 2b is connected with the inner side wall of the steel wire drum 2c through the auxiliary bearing 9. By using the fixed bearing 4, the anti-loose bearing 8 and the auxiliary bearing 9, the anti-loose mechanism responds quickly and sensitively when the steel wire rope is subjected to upward force or the weight at one end of the steel wire rope is removed, and the long-term stable and efficient use of the steel wire rope hoist is ensured. As an equivalent scheme, the inverted trapezoidal block 6b on the anti-loose baffle 6 can also be separated from the micro switch 3 to stop the driving machine 2a from working.

[0026] The upper and lower stop ring seats 1a are arranged on the shell 1, and two opposite limiting screws 1c are arranged on the upper and lower stop ring seats 1a. In the use process, when the rotating angle of the rotating assembly 2 and the anti-loose baffle 6 is too large, the limiting portion 6a on the anti-loose baffle 6 contacts the end of one of the limiting screws 1c, so that the safety accidents caused by the excessive rotation of the rotating assembly 2 and the release of a large amount of steel wire rope wound on the steel wire drum 2c in the use process are avoided. The use experience is improved by adjusting the swing position of the anti-loose baffle 6 according to the use requirements by using the limiting screw 1c.

[0027] The specific embodiments described herein are merely illustrative of the principles of this application. Numerous modifications or adaptations will be readily apparent to those skilled in the art of this application without departing from the spirit or scope of the application as defined by the following claims.

[0028] Although the terms 1, housing; 1a, lower retainer seat; 1b, upper retainer seat; 1b1, obstacle avoidance switch; 1c, limiting screw; 2, rotating assembly; 2a, driving machine; 2b, speed reducer; 2c, steel wire reel; 2c1, steel wire reel cover; 3, micro switch; 4, fixed bearing; 5, inner connecting shaft; 6, anti-loose baffle; 6a, limiting part; 6b, inverted trapezoidal block; 7, tension spring; 8, anti-loose bearing; 9, auxiliary bearing, etc. are used more frequently herein, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the nature of the present application; any interpretation of them as any kind of additional limitation is contrary to the spirit of the present application.

Claims

1. An anti-loosening mechanism for a hoist, comprising a housing (1) and a rotating assembly (2) located within the housing (1), wherein a micro switch (3) electrically connected to the rotating assembly (2) is connected to the housing (1), a fixed bearing (4) is provided within the housing (1), one end of the rotating assembly (2) is connected to the housing (1) via the fixed bearing (4), and the rotating assembly (2) and the housing (1) are capable of relative rotation, characterized in that, The rotating assembly (2) is provided with an inner connecting shaft (5), and a reciprocating anti-loosening baffle (6) is fixedly connected to the inner connecting shaft (5). The anti-loosening baffle (6) is connected to the housing (1) through a tension spring (7), and the anti-loosening baffle (6) can contact the micro switch (3). The outer circumferential surface of the inner connecting shaft (5) is rotatably connected to the housing (1) through an anti-loosening bearing (8), and the inner connecting shaft (5) and the housing (1) can rotate relative to each other.

2. The anti-loosening mechanism of the hoist according to claim 1, characterized in that, The micro switch (3) is fixedly connected to the housing (1) via a lower retaining ring seat (1a), and an upper retaining ring seat (1b) is also fixedly connected to the housing (1). The upper retaining ring seat (1b) and the lower retaining ring seat (1a) are respectively provided with two opposing limiting screws (1c).

3. The anti-loosening mechanism of the hoist according to claim 1 or 2, characterized in that, The limiting part (6a) on the anti-loosening baffle (6) can contact the end faces of the two limiting screws (1c).

4. The anti-loosening mechanism of the hoist according to claim 2, characterized in that, One of the limiting screws (1c) is located on one side of the upper retaining ring seat (1b), and an obstacle avoidance switch (1b1) is provided on the other side of the upper retaining ring seat (1b).

5. The anti-loosening mechanism of the hoist according to claim 1 or 4, characterized in that, The anti-loosening baffle (6) is provided with an inverted trapezoidal block (6b), and the end face of the inverted trapezoidal block (6b) is in contact with the micro switch (3).

6. The anti-loosening mechanism of the hoist according to claim 1, characterized in that, The rotating assembly (2) includes a drive motor (2a) connected to a micro switch (3), a reducer (2b), and a wire drum (2C) fixed to one end of the reducer (2b). The wire drum (2C) and the reducer (2b) are connected by an auxiliary bearing (9) sleeved on the reducer (2b).

7. The anti-loosening mechanism of the hoist according to claim 6, characterized in that, One end of the reducer (2b) is fixedly connected to the wire drum (2C) through the wire drum cover (2C1), and the wire drum cover (2C1) is connected to the housing (1) through the fixed bearing (4).

8. The anti-loosening mechanism of the hoist according to claim 1 or 6, characterized in that, The inner connecting shaft (5) is located between the drive (2a) and the reducer (2b), and the inner connecting shaft (5), the drive (2a) and the reducer (2b) are fixedly connected.

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