Elevator safety tongs device

Abstract

The utility model discloses an elevator safety tongs device, which belongs to the field of elevator accessories and comprises two progressive safety tongs and a linkage mechanism for synchronously braking or restoring braking of the two progressive safety tongs. The two progressive safety tongs are oppositely arranged in the two ends of the lower beam of the elevator car; the linkage mechanism comprises a rotating shaft rotationally installed on the position, corresponding to the inner side of the progressive safety tongs, of an elevator car lower beam, a swing arm fixedly arranged on the rotating shaft and hinged to a wedge block of the progressive safety tongs, and a connecting rod structure with the two ends hinged to the two rotating shafts correspondingly to enable the two rotating shafts to rotate in the opposite directions. And a lifting plate is fixedly mounted on one rotating shaft. The elevator safety tongs device is simple in structure and convenient to use, the two progressive safety tongs are oppositely arranged in the two ends of the elevator car lower beam, the linkage mechanism is installed on the elevator car lower beam, the height of the safety tongs device can be effectively reduced, and the application range of the safety tongs device is widened.

Description

Technical Field

[0001] The present application relates to the technical field of elevator accessories, and in particular to an elevator safety clamp device. Background Art

[0002] The safety clamp is a safety protection device for elevators, usually used in conjunction with the elevator speed limiter. When the elevator runs overspeed, the speed limiter will be triggered. The speed limiter wire rope will activate the safety clamp through the safety clamp lifting mechanism, and the elevator car will be stopped after the safety clamp is activated. Traditional safety clamps generally receive the command of the elevator speed limiter independently, which will make the safety clamp action sequence asynchronous, easily cause the elevator car to shake, and affect the stability and safety of the elevator car.

[0003] The Chinese utility model patent with announcement number CN220467235U discloses a safety clamp lifting mechanism and a safety clamp device. The safety clamp device changes the cylindrical shaft into a shaft with a polygonal end face, so that the shaft has edges and is reinforced by corner pieces, which can effectively ensure the stability of the assembly of the lifting plate and the swing arm with the shaft, improve its ability to withstand torque, and effectively improve the stability of the linkage mechanism, ensuring the service life of the linkage mechanism and the safety of the elevator car. However, the safety clamp is separated from the lifting mechanism, and the safety clamp is fixed at the bottom of the lifting mechanism, which increases the height of the safety clamp device. When the elevator pit is low, it is difficult to install and use.

[0004] Therefore, the present application provides an elevator safety clamp device with compact structure and strong applicability to solve the above problems. Utility Model Content

[0005] The present application provides an elevator safety clamp device, which aims to solve the problem in the background art that the existing safety clamp device has a large height and is difficult to be installed and used in a low elevator pit.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions: an elevator safety clamp device, comprising two progressive safety clamps and a linkage mechanism for making the two progressive safety clamps brake or restore the brake synchronously; the two progressive safety clamps are oppositely placed inside the two ends of the lower beam of the elevator car; the linkage mechanism comprises a rotating shaft rotatably mounted on the lower beam of the elevator car at the inner position corresponding to the progressive safety clamp, a swing arm fixedly arranged on the rotating shaft and hinged with the wedge block of the progressive safety clamp, and a connecting rod structure with two ends respectively hinged on the two rotating shafts to make the two rotating shafts rotate in opposite directions, and a lifting plate is fixedly mounted on one of the rotating shafts. In this way, the two progressive safety clamps are placed oppositely inside the two ends of the lower beam of the elevator car, and the linkage mechanism is installed on the lower beam of the elevator car, which can simultaneously control the two progressive safety clamps to achieve synchronous braking or restoration braking, and can effectively reduce the height of the safety clamp device, adapt to the installation and use of the elevator pit with a low bottom, and improve the scope of application of the safety clamp device.

[0007] Preferably, the rotating shaft is polygonal, and a bearing sleeved on the rotating shaft is fixedly mounted on the lower beam of the elevator car.

[0008] Preferably, a connecting portion is fixedly provided on the rotating shaft, and the two ends of the connecting rod structure are hinged at one end away from the rotating shaft; wherein the connecting portions on the two rotating shafts are staggered away from one end of the rotating shaft so that the two rotating shafts rotate in opposite directions under the action of the connecting rod structure.

[0009] Preferably, the linkage mechanism also includes a support portion fixedly mounted on the lower beam of the elevator car and a return spring mounted on one end of the connecting rod structure, wherein both ends of the return spring are respectively fixedly connected to the connecting rod structure and the support portion, and the connecting rod structure passes through the support portion and is slidably connected to the support portion.

[0010] Preferably, the connecting rod structure includes an adjusting sleeve, a first end and a second end screwed at both ends of the adjusting sleeve, and a connecting member fixedly arranged at the first end and the second end away from one end of the adjusting sleeve and hinged to the connecting portion.

[0011] Preferably, the safety clamp device further comprises a safety switch fixedly arranged on the lower beam of the elevator car for contacting one of the connecting parts.

[0012] Preferably, the connecting portion, the swing arm and the lifting plate all have fitting holes corresponding to the rotating shaft; the safety clamp device also includes locking bolts respectively passing through the connecting portion, the swing arm and the lifting plate for contacting the outer wall of the rotating shaft.

[0013] Preferably, the progressive safety clamp comprises a clamp seat fixedly mounted inside one end of the elevator car lower beam for clamping on the car guide rail, a U-shaped leaf spring fixedly mounted inside the clamp seat, a fixed block symmetrically mounted inside the U-shaped leaf spring, a guide shoe fixedly mounted on the fixed block, and a wedge block moving closer to or away from the car guide rail in the guide shoe, and the bottom of the wedge block is hinged to the end of the swing arm away from the rotating shaft;

[0014] Preferably, a needle roller plate is provided inside the guide shoe, and the needle roller plate is located between the wedge block and the fixed block.

[0015] Preferably, a limit block for limiting the movement of the wedge block is fixedly provided on one end of the guide shoe away from the top of the clamp seat.

[0016] The elevator safety clamp device has a simple structure and is easy to use. The two progressive safety clamps are placed opposite to each other at the two ends of the lower beam of the elevator car, and the linkage mechanism is installed on the lower beam of the elevator car. The two progressive safety clamps can be controlled at the same time to achieve synchronous braking or recovery braking. At the same time, the height of the safety clamp device can be effectively reduced, and it can adapt to the installation in the case of a lower elevator pit, which effectively improves the application range of the safety clamp device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an elevator safety clamp device;

[0018] Figure 2 It is a structural schematic diagram of an elevator safety clamp device in the installed and used state;

[0019] Figure 3 It is a structural schematic diagram of a linkage mechanism in an elevator safety clamp device;

[0020] Figure 4 It is a structural schematic diagram of the connecting rod structure in the linkage mechanism;

[0021] Figure 5 The figure is a schematic diagram of the structure of a progressive safety clamp in an elevator safety clamp device.

[0022] In the figure:

[0023] 1. Progressive safety clamp;

[0024] 11. Clamp seat;

[0025] 12. U-shaped leaf spring;

[0026] 13. Fixed block;

[0027] 14. Guide shoes;

[0028] 141, limit block;

[0029] 15. Wedge;

[0030] 16. Needle roller plate;

[0031] 2. Linkage mechanism;

[0032] 21. Rotating shaft;

[0033] 211, connecting part;

[0034] 22. Arm swing;

[0035] 23. Connecting rod structure;

[0036] 231, adjustment sleeve;

[0037] 232, first end;

[0038] 233, second end;

[0039] 234. Connectors;

[0040] 24. Lifting plate;

[0041] 25. Supporting part;

[0042] 26. Return spring;

[0043] 3. Elevator car lower beam;

[0044] 4. Safety switch;

[0045] 5. Tighten the bolts. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0047] Example 1

[0048] This embodiment provides an elevator safety clamp device, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the elevator safety clamp device comprises two progressive safety clamps 1 and a linkage mechanism 2 for making the two progressive safety clamps 1 brake or restore the brake synchronously.

[0049] Different from the existing elevator safety clamp device, the two progressive safety clamps 1 are oppositely arranged inside the two ends of the lower beam 3 of the elevator car; the linkage mechanism 2 includes a rotating shaft 21 rotatably installed on the lower beam 3 of the elevator car at the inner position corresponding to the progressive safety clamp 1, a swing arm 22 fixedly arranged on the rotating shaft 21 and hinged to the wedge block 15 of the progressive safety clamp 1, and a connecting rod structure 23 whose two ends are respectively hinged on the two rotating shafts 21 to make the two rotating shafts 21 rotate in opposite directions, and a lifting plate 24 is fixedly installed on one of the rotating shafts 21.

[0050] It is worth mentioning that in order to improve the ability of the linkage mechanism 2 to withstand torque, avoid damage to the rotating mechanism caused by excessive torque, and improve the service life of the linkage mechanism 2 and the safety of the elevator car; the rotating shaft 21 is a polygon, and a bearing mounted on the rotating shaft 21 is fixedly installed on the lower beam 3 of the elevator car. Among them, the polygon is a shape with edges such as a triangle and a quadrilateral. The end face of the rotating shaft 21 is a polygon, which can make the rotating shaft 21 have edges, thereby ensuring the stability of the assembly of the swing arm 22 and the lifting plate 24 with the rotating shaft 21, and improving the service life of the linkage mechanism 2 and the safety of the elevator car.

[0051] It should be noted that in order to enable the two progressive safety clamps 1 to act synchronously when the connecting rod structure 23 is actuated, a connecting portion 211 is fixedly provided on the rotating shaft 21, and the two ends of the connecting rod structure 23 are respectively hinged at one end of the two connecting portions 211 away from the rotating shaft 21; wherein, the connecting portions 211 on the two rotating shafts 21 are staggered away from one end of the rotating shaft 21 so that the two rotating shafts 21 rotate in opposite directions under the action of the connecting rod structure 23, so that when one of the rotating shafts 21 rotates, the other rotating shaft 21 is driven to rotate in the opposite direction to the rotating shaft 21 under the action of the connecting rod structure 23, so that the wedge block 15 of the progressive safety clamp 1 moves upward or downward synchronously, so that the wedge block 15 contacts or disengages from the car guide rail, and realizes synchronous braking or recovery braking of the elevator car.

[0052] In order to improve the stability of the linkage mechanism 2, the connecting portion 211, the swing arm 22 and the lifting plate 24 are provided with a set hole corresponding to the rotating shaft 21; the safety clamp device further includes a locking bolt 5 respectively penetrating the connecting portion 211, the swing arm 22 and the lifting plate 24 for contacting the outer wall of the rotating shaft 21. It can be further understood that the locking bolt 5 on the connecting portion 211, the swing arm 22 and the lifting plate 24 are respectively screwed with the connecting portion 211, the swing arm 22 and the lifting plate 24.

[0053] When braking, the steel wire rope of the elevator speed limiter pulls the lifting plate 24, so that the lifting plate 24 drives the rotating shaft 21 to rotate, and under the action of the connecting rod structure 23, the other rotating shaft 21 rotates in the opposite direction with the rotating shaft, thereby driving the swing arm 22 to rotate, so that the swing arm 22 pushes the wedge block 15 of the progressive safety clamp 1 to move close to the car guide rail on the progressive safety clamp 1, and when the wedge block 15 contacts the car guide rail, the elevator car is braked; when resuming braking, the lifting plate 24 is released, and under the action of the gravity of the wedge block 15, the two rotating shafts 21 rotate in the opposite direction to that during braking, so that the wedge block 15 is separated from the car guide rail, the car guide rail is released, and the braking of the elevator car is restored.

[0054] Furthermore, in order to facilitate monitoring of the status of the safety clamp device, such as Figure 2 As shown, the safety clamp device also includes a safety switch 4 fixedly arranged on the lower beam 1 of the elevator car for contacting one of the connecting parts 211. When the lifting plate 24 pulls the rotating shaft 21 to rotate, the connecting part 211 rotates with the rotating shaft 21 and contacts the safety switch 4, thereby realizing the monitoring of the braking state of the safety clamp device; and when the braking is restored, the rotating shaft 21 rotates in the opposite direction, driving the connecting part 211 to disengage from the safety switch 4, thereby realizing the monitoring of the braking state of the safety clamp device. In this way, the state of the safety clamp device is verified, thereby ensuring the stability of the operation of the safety clamp device.

[0055] Specifically, Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the progressive safety clamp 1 includes a clamp seat 11 fixedly installed inside one end of the elevator car lower beam 1 for clamping on the car guide rail, a U-shaped leaf spring 12 fixedly arranged inside the clamp seat 11, a fixed block 13 symmetrically installed on the inner side of the U-shaped leaf spring 12, a guide shoe 14 fixedly arranged on the fixed block 13, and a wedge block 15 that moves closer to or away from the car guide rail in the guide shoe 14, and the bottom of the wedge block 15 is hinged to the end of the swing arm 22 away from the rotating shaft 21.

[0056] In order to ensure the stability of the movement of the wedge block 15, the friction between the wedge block 15 and the guide shoe 14 and the fixed block 13 is reduced, so that the movement of the wedge block 15 is smoother; a needle roller plate 16 is arranged inside the guide shoe 14, and the needle roller plate 16 is located between the wedge block 15 and the fixed block 13.

[0057] When braking, under the action of the swing arm 22, the wedge block 15 is pushed upward on the guide shoe 14, and under the action of the fixed block 13 and the guide shoe 14, the wedge block 15 moves close to the car guide rail. When the wedge block 15 contacts the car guide rail, the friction between the two wedge blocks 15 and the car guide rail is used to brake the elevator car; when restoring the brake, after the lifting plate 24 is released, the wedge block 15 moves downward in the guide shoe 14 under the action of its own gravity, so that the wedge block 15 moves away from the car guide rail, thereby releasing the car guide rail and restoring the braking of the elevator car.

[0058] Furthermore, in order to ensure the stability of the structure of the progressive safety clamp 1 and prevent the wedge 15 from detaching from the guide shoe 14 when the brake is restored, thereby affecting the secondary use of the safety clamp device; a limit block 141 for limiting the movement of the wedge 15 is fixedly provided at one end of the guide shoe 14 away from the top of the clamp seat 11; the limit block 141 is arranged at the bottom of the guide shoe 14, for contacting the bottom of the wedge 15, thereby preventing the wedge 15 from moving away from the guide shoe 14.

[0059] In addition, in order to enable the progressive safety clamp 1 to recover the braking after using the brake, the safety clamp can be used for the next stop, which is convenient for recovering the brake; Figure 2 and Figure 3 As shown, the linkage mechanism 2 also includes a support portion 25 fixedly mounted on the lower beam 3 of the elevator car and a return spring 26 sleeved on one end of the connecting rod structure 23, the two ends of the return spring 26 are respectively fixedly connected to the connecting rod structure 23 and the support portion 25, and the connecting rod structure 23 passes through the support portion 25 and is slidably connected to the support portion 25. When the lifting force of the lifting plate 24 is released, under the elastic force of the return spring 26, the connecting rod structure 23 pushes the rotating shaft 21 to rotate in the opposite direction, so that the swing arm 22 rotates in the opposite direction with the rotating shaft 21, and then the wedge block 15 moves to release the car guide rail and restore the initial state.

[0060] Example 2

[0061] The progressive safety clamps 1 are oppositely arranged inside the two ends of the lower beam 3 of the elevator car. Due to the different lengths or widths of the elevator car, the distance between the two progressive safety clamps 1 is different, that is, for elevator cars of different sizes, the installation distance of the two progressive safety clamps 1 is different, resulting in a different installation distance between the two rotating shafts 21.

[0062] In order to be applicable to the linkage use of cars of different sizes, this embodiment provides an elevator safety clamp device, which is different from the embodiment 1 in that Figure 3 and Figure 4As shown, the connecting rod structure 23 includes an adjusting sleeve 231, a first end 232 and a second end 233 screwed at both ends of the adjusting sleeve 231, and a connecting member 234 fixedly arranged at one end of the first end 232 and the second end 233 away from the adjusting sleeve 231 and hinged to the connecting portion 211.

[0063] When installing the safety clamp device, the first end 232 and / or the second end 233 of the connecting rod structure 23 can be rotated according to the distance between the two rotating shafts 21 to change the length of the first end 232 and / or the second end 233 extending into the adjustment sleeve 231, thereby achieving length adjustment of the connecting rod structure 23 so that the connecting pieces 234 at both ends can be hinged to the connecting parts 211 on the two rotating shafts 21.

[0064] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical solution and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. An elevator safety clamp device, comprising two progressive safety clamps (1) and a linkage mechanism (2) for making the two progressive safety clamps (1) brake synchronously or restore braking; Features: The two progressive safety clamps (1) are oppositely placed inside the two ends of the lower beam (3) of the elevator car; The linkage mechanism (2) comprises a rotating shaft (21) rotatably mounted on the lower beam (3) of the elevator car at a position corresponding to the inner side of the progressive safety clamp (1), a swing arm (22) fixedly arranged on the rotating shaft (21) and hinged to the wedge block (15) of the progressive safety clamp (1), and a connecting rod structure (23) with two ends respectively hinged to the two rotating shafts (21) so that the two rotating shafts (21) rotate in opposite directions, and a lifting plate (24) is fixedly mounted on one of the rotating shafts (21).

2. The elevator safety clamp device according to claim 1, characterized in that: The rotating shaft (21) is polygonal, and a bearing sleeved on the rotating shaft (21) is fixedly mounted on the lower beam (3) of the elevator car.

3. The elevator safety clamp device according to claim 1, characterized in that: A connecting portion (211) is fixedly provided on the rotating shaft (21), and two ends of the connecting rod structure (23) are respectively hinged at one end of the two connecting portions (211) away from the rotating shaft (21); wherein the connecting portions (211) on the two rotating shafts (21) are staggeredly arranged at one end away from the rotating shaft (21).

4. The elevator safety clamp device according to claim 3, characterized in that: The linkage mechanism (2) further comprises a support portion (25) fixedly mounted on the lower beam (3) of the elevator car and a return spring (26) sleeved on one end of the connecting rod structure (23), wherein the two ends of the return spring (26) are respectively fixedly connected to the connecting rod structure (23) and the support portion (25), and the connecting rod structure (23) passes through the support portion (25) and is slidably connected to the support portion (25).

5. The elevator safety clamp device according to claim 3 or 4, characterized in that: The connecting rod structure (23) comprises an adjusting sleeve (231), a first end (232) and a second end (233) screwed to both ends of the adjusting sleeve (231), and a connecting piece (234) fixedly arranged at one end of the first end (232) and the second end (233) away from the adjusting sleeve (231) and hinged to the connecting portion (211).

6. The elevator safety clamp device according to claim 3, characterized in that: The safety clamp device also includes a safety switch (4) fixedly arranged on the elevator car lower beam (3) and used for contacting one of the connecting parts (211).

7. The elevator safety clamp device according to claim 3, characterized in that: The connecting portion (211), the swing arm (22) and the lifting plate (24) are provided with fitting holes corresponding to the rotating shaft (21); the safety clamp device also includes locking bolts (5) respectively passing through the connecting portion (211), the swing arm (22) and the lifting plate (24) for contacting the outer wall of the rotating shaft (21).

8. The elevator safety clamp device according to claim 1, characterized in that: The progressive safety clamp (1) comprises a clamp seat (11) fixedly mounted inside one end of the elevator car lower beam (3) for clamping on the car guide rail, a U-shaped leaf spring (12) fixedly mounted inside the clamp seat (11), a fixed block (13) symmetrically mounted inside the U-shaped leaf spring (12), a guide shoe (14) fixedly mounted on the fixed block (13), and a wedge block (15) that moves closer to or away from the car guide rail in the guide shoe (14), wherein the bottom of the wedge block (15) is hinged to one end of the swing arm (22) away from the rotating shaft (21).

9. The elevator safety clamp device according to claim 8, characterized in that: A needle roller plate (16) is arranged inside the guide shoe (14), and the needle roller plate (16) is located between the wedge block (15) and the fixed block (13).

10. The elevator safety clamp device according to claim 9, characterized in that: A limit block (141) for limiting the movement of the wedge block (15) is fixedly provided at one end of the guide shoe (14) away from the top of the clamp seat (11).

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