Z-shaped lifting arm linkage structure of elevator safety tongs

Abstract

The utility model relates to the technical field of elevators, in particular to a Z-shaped lifting arm linkage structure of elevator safety tongs, which comprises a bracket, safety tongs are arranged in the middles of the front side and the rear side of the bracket, each safety tong comprises a U-shaped tong seat, a second movable groove is formed in the right side of the inner wall of each U-shaped tong seat, and a fixed guide plate is arranged in each second movable groove. A second wedge block is slidably connected to the guide inclined face of the fixed guide plate, a safety tongs linkage mechanism is arranged on the bracket and comprises a linkage rod, two Z-shaped lifting arms are arranged on the outer wall of the linkage rod, a rectangular connecting rod is arranged at the left ends of the Z-shaped lifting arms, and a sleeve rod is connected to the outer side of the rectangular connecting rod in a sleeving mode; the left end of the sleeve rod is rotationally connected with the front side of the second wedge block through a pin shaft. According to the Z-shaped lifting arm linkage structure of the elevator safety tongs, when the safety tongs are triggered, rotation of the lifting arm drives the sleeve rod to move, the second wedge block is driven to slide along the inclined face of the fixed guide plate, the contact area of the second wedge block and the guide rail is remarkably increased, and the locking effect is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of elevator technology, specifically to a Z-shaped lifting arm linkage structure for elevator safety clamps. Background Technology

[0002] Elevator safety brakes are crucial safety protection devices primarily used to ensure elevator safety in abnormal situations. Their main function is to quickly stop the elevator car on the guide rails and maintain its stationary state in emergencies such as overspeeding, loss of control, or suspension failure, effectively preventing injuries and equipment damage. The design and performance of elevator safety brakes directly affect the overall safety of the elevator; therefore, their reliability and response speed are of paramount importance.

[0003] Patent CN118908008A discloses a novel car speed limiter-safety clamp linkage mechanism, including a bracket, a linkage rod, and two safety clamp linkage mechanisms. The linkage rod extends laterally through both ends of the bracket. The two safety clamp linkage mechanisms are mirror-symmetrical on both sides of the bracket and connected as a single unit by the linkage rod. Each safety clamp linkage mechanism is equipped with a safety clamp, which has a vertically opening guide rail groove. A fixed wedge is provided on one side of the guide rail groove of the safety clamp, and a through groove is provided on the other side. A movable wedge is slidably connected in the through groove. A "Z"-shaped lifting arm is fixedly connected to the movable wedge. The end of the lifting arm away from the movable wedge is fixedly connected to the linkage rod, and this end of the lifting arm is close to the bracket. A lifting pin is provided in the middle of the lifting arm for connection with the speed limiter installed on the elevator car. This device can significantly reduce the interaction space of the lifting arm, freeing up elevator installation space and making it suitable for use in smaller elevators.

[0004] The aforementioned existing technology uses a "Z"-shaped lifting arm to drive a movable wedge to rotate in a circle around the linkage rod until the movable wedge rises and abuts the guide rail between the movable and fixed wedges. While this can reduce the interaction space of the lifting arm to a limited extent and free up space for elevator installation, this linkage structure has a problem. The circular motion of the movable wedge around the linkage rod results in a relatively small contact area between the movable wedge and the guide rail after the lifting arm drives the movable wedge to rotate upward. This design flaw reduces the locking effect between the elevator safety clamp and the guide rail, which may affect the overall safety of the elevator. In view of the shortcomings of the above-mentioned existing technology, we propose an elevator safety clamp Z-shaped lifting arm linkage structure. This structure aims to enhance the locking effect of the elevator safety clamp by improving the design of the lifting arm. The unique shape of the Z-shaped lifting arm can more effectively increase the contact area with the guide rail when the movable wedge rises, thereby improving the locking effect and maximizing the safe operation of the elevator. Utility Model Content

[0005] The purpose of this invention is to provide a Z-shaped lifting arm linkage structure for elevator safety clamps, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] The elevator safety gear Z-shaped lifting arm linkage structure includes a bracket, which supports the safety gear and the safety gear linkage mechanism. Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, safety clamps are provided in the middle of both the front and rear sides of the bracket. The safety clamps are used to clamp the elevator guide rail to achieve braking in an emergency. The safety clamp includes a U-shaped clamp seat, which serves as the mounting frame for the safety clamp. A first movable groove is provided on the left side of the inner wall of the U-shaped clamp seat. The first movable groove is used to accommodate a movable guide plate and a first wedge. The movable guide plate is provided in the first movable groove. The movable guide plate guides the first wedge to move through an inclined surface. The first wedge is provided at the guide inclined surface of the movable guide plate. The first wedge contacts the guide rail to form a clamping force. A second movable groove is provided on the right side of the inner wall of the U-shaped clamp seat. The second movable groove is used to accommodate a fixed guide plate and a second wedge. The fixed guide plate is provided in the second movable groove. The fixed guide plate guides the second wedge to slide through an inclined surface. The guide inclined surface of the fixed guide plate is slidably connected to the second wedge. The second wedge cooperates with the first wedge to clamp and stop the guide rail.

[0008] The bracket is equipped with a safety gear linkage mechanism, which transmits the speed limiter trigger command and drives the safety gear to move. The safety gear linkage mechanism includes a linkage rod rotatably connected to the bracket. The rear end of the linkage rod passes from the front side of the bracket to the rear side, serving as a rotational shaft for power transmission. Z-shaped lifting arms are located on the outer wall of the linkage rod near both the front and rear ends. These Z-shaped lifting arms connect the linkage rod and a sleeve rod. A rectangular connecting rod is located at the left end of each Z-shaped lifting arm, transmitting the lifting force of the Z-shaped lifting arm. A sleeve rod is fitted onto the outer side of the rectangular connecting rod. The lever and sleeve are used to push the second wedge block to slide along the inclined plane. When the Z-shaped lifting arm rotates upward, the sleeve can adaptively move outward, thereby driving the second wedge block to move upward along the guide inclined plane of the fixed guide plate, so that the left side of the second wedge block is completely abutted against the guide rail, forcing the right side of the first wedge block to also be completely abutted against the guide rail. The left end of the sleeve is rotatably connected to the front side of the second wedge block through a pin. The second wedge block is located on the front outer wall of the linkage rod, which is provided with a lifting rod. The lifting rod is used to receive the trigger action of the speed limiter. The lifting rod is provided with a speed limiter connector, which is connected to the speed limiter rope.

[0009] Preferred, such as Figure 1As shown, the bracket has two mounting seats arranged symmetrically on both the front and rear sides, and the mounting seats are fixed to the elevator car by bolts.

[0010] Preferred, such as Figure 4 As shown, multiple disc springs are provided on the left side of the inner wall of the first movable groove. The right end of the disc spring abuts against the left side of the movable guide plate. The disc springs, together with the movable guide plate, are used to buffer the impact force when the first wedge block contacts the guide rail.

[0011] The bottom of the U-shaped clamp is provided with an L-shaped bracket, which is used to support the spring. The bottom of the inner wall of the L-shaped bracket is provided with a spring, and the top of the spring is fixedly connected to the bottom of the first wedge. The spring is used to reset the first wedge after emergency release.

[0012] Preferred, combined Figure 1 and Figure 4 As shown, the front side of the U-shaped clamp seat is provided with a first cover plate for closing the first movable groove. The first cover plate prevents the internal components of the first movable groove from falling off. The front side of the U-shaped clamp seat is provided with a second cover plate for closing the second movable groove. The second cover plate prevents the internal components of the second movable groove from falling off. The front side of the second cover plate is inclinedly provided with a guide hole for the pin shaft to pass through. The guide hole ensures that the pin shaft of the sleeve moves along a preset trajectory.

[0013] Preferred, combined Figure 5 and Figure 6 As shown, the guide slope of the fixed guide plate is provided with a T-shaped groove, which restricts the sliding direction of the second wedge. The right slope of the second wedge is provided with a T-shaped slider, which is slidably connected in the T-shaped groove. The T-shaped slider and the T-shaped groove cooperate to prevent the second wedge from derailing.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The elevator safety clamp Z-shaped lifting arm linkage structure, through the unique structural design of the Z-shaped lifting arm, when the safety clamp is triggered, the rotation of the lifting arm drives the sleeve rod to move, causing the second wedge to slide along the inclined surface of the fixed guide plate, which significantly increases the contact area between the second wedge and the guide rail. Combined with the bidirectional clamping force of the first wedge, it effectively improves the locking effect and prevents the risk of sliding due to the small contact area.

[0016] 2. The elevator safety clamp's Z-shaped lifting arm linkage structure, with its T-shaped groove and T-shaped slider design, restricts the sliding trajectory of the second wedge, preventing derailment or deviation during operation and ensuring the stability and reliability of the clamping action.

[0017] 3. The elevator safety clamp features a Z-shaped lifting arm linkage structure. This linkage structure enables efficient transmission of lifting action within a limited space, reducing the space occupied by the lifting arm and adapting to the installation requirements of small elevators, thus expanding the applicability of the equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall first-view structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the overall second-view structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the overall third-view structure of this utility model;

[0021] Figure 4 This is one of the partial structural schematic diagrams of this utility model;

[0022] Figure 5 This is the second partial structural schematic diagram of the present utility model;

[0023] Figure 6 This is a schematic diagram of the assembly structure of the second wedge and the sleeve rod in this utility model;

[0024] In the diagram: 100, bracket; 200, mounting base; 300, safety clamp; 310, U-shaped clamp seat; 311, first movable groove; 312, second movable groove; 313, L-shaped bracket; 320, disc spring; 330, movable guide plate; 340, spring; 350, first wedge; 360, first cover plate; 370, fixed guide plate; 371, T-shaped slide; 380, second wedge; 381, T-shaped slider; 390, second cover plate; 391, guide hole; 400, safety clamp linkage mechanism; 410, linkage rod; 420, Z-shaped lifting arm; 430, rectangular connecting rod; 440, sleeve rod; 450, lifting rod; 460, speed limiter connector. Detailed Implementation

[0025] 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.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Please see Figures 1-6 This utility model provides a technical solution:

[0028] The elevator safety clamp Z-shaped lifting arm linkage structure includes a bracket 100, which supports the safety clamp 300 and the safety clamp linkage mechanism 400. Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, safety clamps 300 are provided in the middle of both the front and rear sides of the bracket 100. The safety clamps 300 are used to clamp the elevator guide rails in an emergency to achieve braking. Each safety clamp 300 includes a U-shaped clamp seat 310, which serves as the mounting frame for the safety clamp 300. A first movable groove 311 is provided on the left side of the inner wall of the U-shaped clamp seat 310. The first movable groove 311 accommodates a movable guide plate 330 and a first wedge 350. The movable guide plate 330 guides the first wedge 350 to move via an inclined surface. A first wedge 350 is provided on the guide slope of the guide plate 330. The first wedge 350 contacts the guide rail to form a clamping force. A second movable groove 312 is provided on the right side of the inner wall of the U-shaped clamp seat 310. The second movable groove 312 is used to accommodate the fixed guide plate 370 and the second wedge 380. The fixed guide plate 370 is provided in the second movable groove 312. The fixed guide plate 370 guides the second wedge 380 to slide through the slope. The guide slope of the fixed guide plate 370 is slidably connected to the second wedge 380. The second wedge 380 cooperates with the first wedge 350 to clamp and stop the guide rail.

[0029] The bracket 100 is equipped with a safety gear linkage mechanism 400. The safety gear linkage mechanism 400 is used to transmit the speed limiter trigger command and drive the safety gear 300 to move. The safety gear linkage mechanism 400 includes a linkage rod 410 rotatably connected to the bracket 100. The rear end of the linkage rod 410 passes through the front side of the bracket 100 to the rear side of the bracket 100. The linkage rod 410 serves as a rotating shaft for power transmission. Z-shaped lifting arms 420 are provided on the outer wall of the linkage rod 410 near both the front and rear ends. The Z-shaped lifting arms 420 connect the linkage rod 410 and the sleeve rod 440. A rectangular connecting rod 430 is provided on the left end of the Z-shaped lifting arm 420. The rectangular connecting rod 430 is used to transmit the lifting force of the Z-shaped lifting arm 420. The outer side of the rectangular connecting rod 430 is sleeved. A sleeve rod 440 is attached, which is used to push the second wedge 380 to slide along the inclined plane. When the Z-shaped lifting arm 420 rotates upward, the sleeve rod 440 can adaptively move outward, thereby driving the second wedge 380 to move upward along the guide inclined plane of the fixed guide plate 370, so that the left side of the second wedge 380 is completely abutted against the guide rail, forcing the right side of the first wedge 350 to also be completely abutted against the guide rail. The left end of the sleeve rod 440 is rotatably connected to the front side of the second wedge 380 through a pin. The second wedge 380 is located on the front outer wall of the linkage rod 410, which is provided with a lifting rod 450. The lifting rod 450 is used to receive the trigger action of the speed limiter. The lifting rod 450 is provided with a speed limiter connector 460, which is connected to the speed limiter rope.

[0030] In this embodiment, as Figure 1 As shown, the bracket 100 has two mounting seats 200 arranged symmetrically on both the front and rear sides. The mounting seats 200 are fixed to the elevator car by bolts.

[0031] Specifically, such as Figure 4 As shown, multiple disc springs 320 are provided on the left side of the inner wall of the first movable groove 311. The right end of the disc spring 320 abuts against the left side of the movable guide plate 330. The disc spring 320, together with the movable guide plate 330, is used to buffer the impact force when the first wedge block 350 contacts the guide rail.

[0032] The bottom of the U-shaped clamp 310 is provided with an L-shaped bracket 313, which is used to support the spring 340. The bottom of the inner wall of the L-shaped bracket 313 is provided with the spring 340. The top of the spring 340 is fixedly connected to the bottom of the first wedge 350. The spring 340 is used to reset the first wedge 350 after emergency release.

[0033] Furthermore, in combination Figure 1 and Figure 4As shown, the front side of the U-shaped clamp 310 is provided with a first cover plate 360 ​​for closing the first movable groove 311. The first cover plate 360 ​​prevents the internal components of the first movable groove 311 from falling out. The front side of the U-shaped clamp 310 is provided with a second cover plate 390 for closing the second movable groove 312. The second cover plate 390 prevents the internal components of the second movable groove 312 from falling out. The front side of the second cover plate 390 is inclinedly provided with a guide hole 391 for the pin shaft to pass through. The guide hole 391 ensures that the pin shaft of the sleeve rod 440 moves along a preset trajectory.

[0034] Furthermore, in combination Figure 5 and Figure 6 As shown, the guide slope of the fixed guide plate 370 is provided with a T-shaped slide groove 371. The T-shaped slide groove 371 restricts the sliding direction of the second wedge block 380. The right slope of the second wedge block 380 is provided with a T-shaped slider 381. The T-shaped slider 381 is slidably connected in the T-shaped slide groove 371. The T-shaped slider 381 and the T-shaped slide groove 371 cooperate to prevent the second wedge block 380 from derailing.

[0035] In this embodiment, when the elevator safety clamp Z-shaped lifting arm linkage structure is in use, if the elevator overspeeds or goes out of control, the speed governor connector 460 triggers the lifting rod 450 via the speed governor rope, causing the linkage rod 410 to rotate. The linkage rod 410 drives the Z-shaped lifting arms 420 on both sides to rotate upward about the linkage rod 410 as the axis. The Z-shaped lifting arms 420 pull the sleeve rod 440 outward via the rectangular connecting rod 430. The sleeve rod 440 pushes the second wedge block 380 to slide along the T-shaped slide groove 371 of the fixed guide plate 370, so that the T-shaped slider 381 of the second wedge block 380 slides along the T-shaped slide groove 371. The guide plate rises along the inclined surface, forcing the left side of the second wedge 380 to fully contact the guide rail. At the same time, the rising motion of the second wedge 380 is transmitted to the first wedge 350 through the U-shaped clamp seat 310. The first wedge 350 moves to the right under the guidance of the inclined surface of the movable guide plate 330 and the elastic support of the disc spring 320, so that its right side fully contacts the guide rail, forming a bidirectional clamping, and finally realizing the rapid braking and safety locking of the elevator car. The disc spring 320 buffers the impact force between the first wedge 350 and the guide rail. After emergency release, the spring 340 pulls the first wedge 350 back to its original position through the L-shaped bracket 313.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An elevator safety clamp Z-shaped lifting arm linkage structure, including a bracket (100), characterized in that: Safety clamps (300) are provided in the middle of both the front and rear sides of the bracket (100). The safety clamps (300) include a U-shaped clamp seat (310). A first movable groove (311) is provided on the left side of the inner wall of the U-shaped clamp seat (310). A movable guide plate (330) is provided in the first movable groove (311). A first wedge (350) is provided at the guide slope of the movable guide plate (330). A second movable groove (312) is provided on the right side of the inner wall of the U-shaped clamp seat (310). A fixed guide plate (370) is provided in the second movable groove (312). A second wedge (380) is slidably connected to the guide slope of the fixed guide plate (370). The bracket (100) 0) is provided with a safety clamp linkage mechanism (400), the safety clamp linkage mechanism (400) includes a linkage rod (410) rotatably connected to the bracket (100), the outer wall of the linkage rod (410) and near the front and rear ends are provided with Z-shaped lifting arms (420), the left end of the Z-shaped lifting arm (420) is provided with a rectangular connecting rod (430), the outer side of the rectangular connecting rod (430) is sleeved with a sleeve rod (440), the left end of the sleeve rod (440) is rotatably connected to the front side of the second wedge block (380) through a pin, the front end of the linkage rod (410) is provided with a lifting rod (450), the lifting rod (450) is provided with a speed limiter connector (460).

2. The elevator safety clamp Z-shaped lifting arm linkage structure according to claim 1, characterized in that: The bracket (100) has two mounting seats (200) arranged symmetrically on both the front and rear sides. The mounting seats (200) are fixed to the elevator car by bolts.

3. The elevator safety clamp Z-shaped lifting arm linkage structure according to claim 1, characterized in that: Multiple disc springs (320) are provided on the left side of the inner wall of the first movable groove (311), and the right end of the disc springs (320) abuts against the left side of the movable guide plate (330).

4. The elevator safety clamp Z-shaped lifting arm linkage structure according to claim 1, characterized in that: The bottom of the U-shaped clamp (310) is provided with an L-shaped bracket (313), and the bottom of the inner wall of the L-shaped bracket (313) is provided with a spring (340). The top of the spring (340) is fixedly connected to the bottom of the first wedge (350).

5. The elevator safety clamp Z-shaped lifting arm linkage structure according to claim 1, characterized in that: The front side of the U-shaped clamp (310) is provided with a first cover plate (360) for closing the first movable groove (311), and the front side of the U-shaped clamp (310) is provided with a second cover plate (390) for closing the second movable groove (312). The front side of the second cover plate (390) is inclinedly provided with a guide hole (391) for the pin shaft to pass through.

6. The elevator safety clamp Z-shaped lifting arm linkage structure according to claim 1, characterized in that: The guide slope of the fixed guide plate (370) is provided with a T-shaped groove (371), and the right slope of the second wedge (380) is provided with a T-shaped slider (381), which is slidably connected in the T-shaped groove (371).

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