A roller guide shoe type device for preventing elevator car from accidentally moving

Abstract

The present invention provides a roller guide shoe type device for preventing an elevator car from accidentally moving, belonging to the technical field of elevators. The roller guide shoe type device for preventing an elevator car from accidentally moving comprises a fixed seat, a left roller, a right roller, and an intermediate roller. The left roller and the right roller are symmetrically arranged on the left and right sides, and the left roller and the right roller are each connected to the fixed seat via a set of spring swing mechanisms. The intermediate roller is located on the mid-perpendicular line of the line connecting the left and right rollers. The wheel bodies of the left and right rollers each have a chute passing through the center, and a wheel axle is slidably connected in the chute. A toggle mechanism is also fixed to the fixed seat. When a car displacement detection unit detects that the car has accidentally moved, a toggle block toggles the wheel axles of the symmetrically arranged left and right rollers, so that the left and right rollers are transformed into a cam structure. When the car moves, it can play a good clamping and braking role. The structure is simple and compact, and the braking effect is good.

Description

Technical Field

[0001] The present invention belongs to the technical field of elevators, and relates to a device for preventing an elevator car from accidentally moving, in particular to a roller guide shoe type device for preventing an elevator car from accidentally moving. Background Art

[0002] The safe operation of an elevator consists of two aspects: safe operation during elevator ascent and descent, and the safety of people entering and exiting the car when the elevator stops. The safety of people entering and exiting the car when the elevator stops is particularly important, especially when the elevator floor doors are not locked or the car doors are not closed. Failure of any single component of the drive host or drive control system may cause the car to move unexpectedly, which may be dangerous when people enter and exit the elevator car with the door open, or may cause shear accidents between the elevator car and the floor. Chinese patent [CN109019240B] discloses a brake control device arranged on an elevator car; a car displacement detection unit, used to detect the displacement signal of the car; a car door detection unit, used to detect the switch status signal of the car door; a landing door detection unit, used to detect the switch status signal of the landing door; a transmission unit, used to transmit the car displacement signal, the car door switch status signal, and the landing door switch status signal to a control unit; a control unit, which receives signals from one or more of the car displacement detection unit, the car door detection unit, and the landing door detection unit and controls the action of the brake assembly according to the signals, while relying on electromagnetic actuation force to enable the brake assembly to suppress accidental movement of the car when the landing door is not locked or the car door is not closed. However, the patent uses upper and lower devices that are symmetrically arranged in an upper and lower manner to brake, and the upper and lower devices perform upper braking and lower braking respectively, which has a complex structure and is more prone to failure. At the same time, the brake block and the guide block of the patent are braked by electromagnetic adsorption, and the position of the brake block is affected by the electromagnetic strength and the conductive position of the electromagnet coil. If a local failure occurs in the electromagnet, the brake block may not be in place, which is more harmful. In addition, Chinese patent [Granted Announcement No.: CN202754662U] discloses an elastic roller guide shoe, comprising a base plate and three rollers. The base plate has a notch formed therein, with the three rollers corresponding to the notch in the base plate, for passing through an elevator guide rail. Two rollers are located in the same plane, perpendicular to the plane of the third roller, and the plane of the third roller is located between the two rollers. The three rollers are assembled on three swing arms, which are connected to a rotating shaft having vertical through-holes and axial screw holes. The base plate is connected to a transverse support and a double seat, and a longitudinal support and a single seat. The first and second swing arms are screwed to the transverse support. The vertical through-holes of the rotating shafts on the two swing arms correspond to the through-holes on the same side ends of the double seat, and a screw is passed through. The screw is located on the double seat and is tightened by a nut. The axial screw hole of the rotating shaft is screwed into a screw, the inner end of which can press against the screw. The assembly structure of the third swing arm, the longitudinal support, and the single seat is similar to the above. This type of roller guide shoe only has a guiding function and is relatively simple. Summary of the Invention

[0003] The purpose of the present invention is to address the above-mentioned problems in the existing technology and to propose a roller guide shoe type device for preventing the elevator car from accidentally moving.

[0004] The object of the present invention can be achieved through the following technical solutions: A roller guide shoe type device for preventing an elevator car from accidentally moving, comprising a fixed seat, a left roller, a right roller and an intermediate roller, wherein the left roller and the right roller are arranged symmetrically on the left and right sides, and the left roller and the right roller are each connected to the fixed seat through a set of spring swing mechanisms, and the intermediate roller is located on the mid-vertical line of the line connecting the left roller and the right roller, and is characterized in that the wheel bodies of the left roller and the right roller each have a slide groove passing through the center, a wheel axle is slidably connected in the slide groove, and a toggle mechanism is also fixed to the fixed seat. The toggle mechanism includes a car displacement detection unit, a drive motor, a toggle seat, a toggle shaft and a toggle block. The limit seat is fixedly connected to the fixed seat, the toggle shaft is connected to the toggle seat, the toggle block is fixedly connected to the toggle shaft, and the toggle block is against the wheel axle. The toggle shaft is connected to the motor shaft of the drive motor, and the drive motor is connected to the car displacement detection unit. When the car displacement detection unit detects that the car moves unexpectedly, the drive motor drives the toggle shaft to rotate and drives the wheel axle along the slide groove from the center position of the wheel body to the eccentric position of the wheel body through the toggle block.

[0005] In the above-mentioned roller guide shoe type device for preventing the elevator car from accidentally moving, the toggle block is a cross-shaped structure, and the wheel axle abuts against the inner corner of the toggle block.

[0006] In the above-mentioned roller guide shoe type device for preventing the elevator car from accidentally moving, the inner corner of the toggle block is made into a circular chamfer, and the shape and size are consistent with the wheel axle.

[0007] In the above-mentioned roller guide shoe type device for preventing accidental movement of the elevator car, the spring swing mechanism includes a triangular swing arm, a swing shaft, a rotating shaft, a screw, a spring and a support seat. The wheel shaft, swing shaft and rotating shaft are respectively located on the three corners of the triangular swing arm. The support seat is fixedly connected to the fixed seat. The triangular swing arm is hinged to the support seat through the swing shaft. The rotating shaft is pivotally connected to the triangular swing arm. The screw passes through the top plate of the support seat and is connected to the rotating shaft. The spring is sleeved on the screw, and the spring is located between the nut of the screw and the support seat.

[0008] In the above-mentioned roller guide shoe type device for preventing accidental movement of the elevator car, the screw is connected to the end of the support seat near the middle roller, the toggle seat is connected to the end of the support seat far from the middle roller, and the toggle seat and the screw on the same support seat are respectively located on both sides of the corresponding wheel axle.

[0009] In the above-mentioned roller guide shoe type device for preventing the elevator car from accidentally moving, the diameter of the through hole on the support seat for inserting the screw is larger than the outer diameter of the screw.

[0010] In the above-mentioned roller guide shoe type device for preventing the elevator car from accidentally moving, the shifting shaft and the wheel shaft are arranged at the same height.

[0011] In the above-mentioned roller guide shoe type device for preventing the elevator car from accidentally moving, the shifting shaft and the shifting block are located on the side of the wheel shaft far from the middle roller.

[0012] In the above-mentioned roller guide shoe type device for preventing the elevator car from accidentally moving, the chute is an arc-shaped through groove, and the arc center of the chute is the center of the wheel body.

[0013] In the above-mentioned roller guide shoe type device for preventing the elevator car from accidentally moving, the curvature of the sliding groove is 45° to 90°.

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

[0015] 1. The present invention adds a function to prevent the elevator car from accidentally moving on the roller guide shoe, with a simple and compact structure and low modification difficulty;

[0016] 2. The present invention drives the toggle shaft and the toggle block to rotate through a motor connected to the car displacement detection unit. When the car displacement detection unit detects that the car has moved unexpectedly, the toggle block toggle the axles of the symmetrically arranged left and right rollers, so that the left and right rollers are transformed into cam structures, which can play a good clamping and braking role when the car moves. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a top view of the structure of the present invention.

[0018] Figure 2 It is a structural rear view of the present invention.

[0019] Figure 3 It is a structural schematic diagram of the wheel body of the present invention in a normal working state.

[0020] Figure 4 It is a schematic structural diagram of the wheel body of the present invention in a braking state.

[0021] In the figure, 1. fixed seat; 2. left roller; 3. right roller; 4. middle roller; 5. slide groove; 6. wheel axle; 7. toggle seat; 8. toggle shaft; 9. toggle block; 10. bearing 1; 11. wheel body; 12. triangular swing arm; 13. swing shaft; 14. rotating shaft; 15. screw; 16. spring; 17. support seat; 10. drive motor; 19. bearing 2. DETAILED DESCRIPTION

[0022] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0023] Reference Figure 1-Figure 2 This embodiment is a roller guide shoe type device for preventing accidental movement of an elevator car. It includes a fixed base 1, a left roller 2, a right roller 3, and an intermediate roller 4. The fixed base 1 is fixedly connected to the top and / or bottom of the elevator car, providing support for the entire device. The left and right rollers 2 and 3 are symmetrically arranged and each is connected to the fixed base 1 via a spring swing mechanism. The intermediate roller 4 is located on the mid-perpendicular line connecting the left and right rollers 2 and 3 and is also connected to the fixed base 1 via a spring swing mechanism chain structure.

[0024] Combine Figure 3 and Figure 4 The wheel bodies 11 of the left roller 2 and the right roller 3 both have a slide groove 5 passing through the center, the outer diameters of the wheel axles 6 of the left roller 2 and the right roller 3 are consistent with the width of the corresponding slide groove 5, and the wheel axles 6 of the left roller 2 and the right roller 3 are both slidably connected in the slide groove 5.

[0025] A toggle mechanism is also fixedly connected to the fixed base 1, and the toggle mechanism includes a car displacement detection unit, a drive motor 18, a toggle base 7, a toggle shaft 8 and a toggle block 9. The toggle base 7 is fixedly connected to the fixed base 1, and the toggle shaft 8 is connected to the toggle base 7 through a bearing 10. The toggle block 9 is fixedly connected to the toggle shaft 8, and the toggle block 9 rests on the wheel axle 6. The toggle shaft 8 is connected to the motor shaft of the drive motor 18, and the drive motor 8 is connected to the car displacement detection unit.

[0026] The spring swing mechanism includes a triangular swing arm 12, a swing shaft 13, a rotating shaft 14, a screw 15, a spring 16 and a support seat 17. The axle 6, the swing shaft 13 and the rotating shaft 14 are respectively located on the three corners of the triangular swing arm 12. The support seat 17 is fixedly connected to the fixed seat 1. The triangular swing arm 12 is hinged to the support seat 17 through the swing shaft 13. The rotating shaft 14 is pivotally connected to the triangular swing arm 12 through the bearing 2 19. The screw 15 passes through the top plate 1701 of the support seat 17 and is connected to the rotating shaft 14. The spring 16 is sleeved on the screw 15, and the spring 16 is located between the nut of the screw 15 and the support seat 17. The diameter of the through hole on the support seat 17 for inserting the screw 15 is larger than the outer diameter of the screw 15. When the triangular swing arm 12 swings, the screw 15 can move in the through hole on the support seat 17 to avoid locking. At the same time, the swing stroke of the triangular swing arm 12 is limited to prevent the wheel axle 6 slidably connected in the slide groove 5 from escaping the toggle block 9.

[0027] Furthermore, the toggle block 9 is a cross-shaped structure, and the axle 6 abuts against the inner corner of the toggle block 9. The inner corner of the toggle block 9 is formed into a rounded chamfer, and the shape and size of the chamfer are consistent with the axle 6. The axle 6 can rotate against the rounded chamfer of the toggle block 9, so that when the left roller 2 and the right roller 3 are working normally, the axle 6 can ensure a better limiting effect under the cooperation of the spring swing mechanism and the toggle mechanism, while also ensuring smooth and stable rotation.

[0028] Furthermore, the screw 15 is connected to the end of the support seat 17 near the middle roller 4, the toggle seat 7 is connected to the end of the support seat 17 far from the middle roller 4, and the toggle seat 7 and the screw 15 on the same support seat 17 are respectively located on both sides of the corresponding wheel axle 6, which has a better effect during braking.

[0029] Furthermore, the toggle shaft 8 and the wheel axle 6 are arranged at the same height, and the toggle shaft 8 and the toggle block 9 are located on the side of the wheel axle 6 farthest from the middle roller 4. When the elevator moves unexpectedly, the toggle shaft 8 and the wheel axle 6 are located on the vertical line of the elevator guide rail, and the clamping forces applied by the left roller 2 and the right roller 3 on the elevator guide rail are in the same horizontal direction, thereby improving the clamping and braking effect.

[0030] Furthermore, the chute 5 is an arc-shaped through groove, and the arc center of the chute 5 is the center of the wheel body 11. The arc-shaped through groove is relatively straight. The groove can better adapt to the wheel body that may stop in any state when the elevator car stops. It can ensure that the left roller 2 and the right roller 3 can be transformed into the cam structure as soon as possible, and at the same time, it can ensure that the wheel shaft 6 will not fall out when sliding in the chute 5.

[0031] Furthermore, the arc of the chute 5 is 45° to 90°.

[0032] The working principle of this embodiment is as follows: When the elevator car is in normal operation, the axles 6 of the left and right rollers 2 and 3 are positioned at the center of their respective wheel bodies 11 (i.e., the center of the chute 5) under the restraint of the corresponding spring swing mechanism and the toggle block 9 of the toggle mechanism. The left and right rollers 2 and 3 are mounted on the axles 6 via bearing sleeves and can rotate relative to the axles 6. Together with the intermediate roller 4, they are guided on the elevator guide rails. When the elevator car is stopped and unexpected movement occurs, the car displacement detection unit detects the unexpected movement of the car, activates the drive motor 18, drives the toggle shaft 8 to rotate, and drives the axle 6 along the chute 5 from the center of the wheel body 11 to an eccentric position of the wheel body 11 through the toggle block 9. At this time, the left and right rollers 2 and 3 become cam structures due to the displacement of the axles 6 (i.e., the center of rotation). When the elevator car moves further, the left and right rollers 2 and 3, in cooperation with the corresponding spring swing mechanism and toggle mechanism, can clamp on the elevator guide rails to achieve braking, preventing the elevator car from further movement.

[0033] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A roller guide shoe type device for preventing an elevator car from accidentally moving, comprising a fixed seat (1), a left roller (2), a right roller (3) and an intermediate roller (4), wherein the left roller (2) and the right roller (3) are arranged symmetrically on the left and right sides, and each of the left roller (2) and the right roller (3) is connected to the fixed seat (1) via a set of spring swing mechanisms, characterized in that: The wheel bodies (11) of the left roller (2) and the right roller (3) each have a sliding groove (5) passing through the center, and a wheel shaft (6) is slidably connected in the sliding groove (5). The fixed seat (1) is also fixedly connected with a toggle mechanism, and the toggle mechanism includes a car displacement detection unit, a drive motor (18), a toggle seat (7), a toggle shaft (8) and a toggle block (9). The toggle seat (7) is fixedly connected to the fixed seat (1), and the toggle shaft (8) is connected to the fixed seat (1) through a bearing (10). The toggle block (9) is connected to the toggle seat (7), the toggle block (9) is fixed on the toggle shaft (8), and the toggle block (9) is against the wheel shaft (6), the toggle shaft (8) is connected to the motor shaft of the drive motor (18), and the drive motor (18) is connected to the car displacement detection unit. When the car displacement detection unit detects that the car moves unexpectedly, the drive motor (18) drives the toggle shaft (8) to rotate and drives the wheel shaft (6) along the slide groove (5) from the wheel body ( 11) is moved to an eccentric position of the wheel body (11), the toggle block (9) is a cross-shaped structure, the wheel shaft (6) abuts against the inner corner of the toggle block (9), the spring swing mechanism comprises a triangular swing arm (12), a swing shaft (13), a rotating shaft (14), a screw (15), a spring (16) and a support seat (17), the wheel shaft (6), the swing shaft (13) and the rotating shaft (14) are respectively located on the three corners of the triangular swing arm (12), The support seat (17) is fixedly connected to the fixed seat (1), the triangular swing arm (12) is hinged to the support seat (17) through the swing shaft (13), the rotating shaft (14) is pivotally connected to the triangular swing arm (12), the screw rod (15) passes through the top plate (1701) of the support seat (17) and is connected to the rotating shaft (14), the spring (16) is sleeved on the screw rod (15), and the spring (16) is located between the nut of the screw rod (15) and the support seat (17).

2. The roller guide shoe type device for preventing the elevator car from accidentally moving according to claim 1, characterized in that: The inner corner of the toggle block (9) is formed into a circular chamfer, and its shape and size are consistent with those of the wheel axle (6).

3. The roller guide shoe type device for preventing an elevator car from accidentally moving according to claim 1, characterized in that: The screw rod (15) is connected to one end of the support seat (17) near the middle roller (4), and the toggle seat (7) is connected to one end of the support seat (17) far from the middle roller (4), and the toggle seat (7) and the screw rod (15) on the same support seat (17) are respectively located on both sides of the corresponding wheel shaft (6).

4. The roller guide shoe type device for preventing an elevator car from accidentally moving according to claim 3, characterized in that: The diameter of the through hole on the support seat (17) for the screw (15) to be inserted is larger than the outer diameter of the screw (15).

5. The roller guide shoe type device for preventing an elevator car from accidentally moving according to claim 1, characterized in that: The shifting shaft (8) and the wheel shaft (6) are arranged at the same height.

6. The roller guide shoe type device for preventing an elevator car from accidentally moving according to claim 5, characterized in that: The shifting shaft (8) and the shifting block (9) are located on the side of the wheel axle (6) far from the middle roller (4).

7. The roller guide shoe type device for preventing an elevator car from accidentally moving according to any one of claims 1 to 6, characterized in that: The chute (5) is an arc-shaped through groove, and the arc center of the chute (5) is the center of the wheel body (11).

8. The roller guide shoe type device for preventing an elevator car from accidentally moving according to claim 7, characterized in that: The arc of the slide groove (5) is 45° to 90°.

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