A braking and stable elevator safety clamp

Abstract

This utility model relates to the field of elevator safety clamp technology, and more particularly to a stable braking elevator safety clamp. Its technical solution includes a housing, guide rails, and wedge blocks. The housing has a U-shaped hollow structure, and a fixing frame is bolted to the back of the housing. Two sets of rollers are rotatably mounted on the inner side of the housing. The guide rails are movably mounted inside the housing and contact the rollers. Wedge blocks are movably mounted on both sides of the guide rails inside the housing. This utility model, by providing ventilation holes at the bottom of the housing, allows air to be introduced into the housing during rapid elevator descent, and then hot air is discharged from the front of the housing. The air blows over the two sets of wedge blocks, achieving a cooling effect on the wedge blocks, ensuring that the wedge blocks maintain a relatively stable braking force when rubbing against the guide rails, and preventing the braking effect of the wedge blocks from gradually decreasing and affecting the safety of the elevator during emergency braking.

Description

Technical Field

[0001] This utility model relates to the field of elevator safety clamp technology, specifically to a braking and stabilizing elevator safety clamp. Background Technology

[0002] As the core vertical transportation tool in high-rise buildings, the safety of elevators during operation is directly related to the safety of passengers' lives. In the event of a sudden elevator drop, components such as reducers and safety clamps can slow down the descent of the elevator car, thereby preventing the elevator from falling rapidly from a height. As the last line of defense when the elevator is overspeeding or falling, the braking stability of the safety clamp is the core indicator for measuring its performance. Therefore, we propose a braking stability elevator safety clamp.

[0003] The existing technology still has the following drawbacks in its use: 1. In the use of existing elevator safety clamps, braking is achieved based on the friction between the wedge block and the guide rail. Therefore, in an emergency, the temperature inside the safety clamp will rise sharply, and the high temperature will cause the braking force of the wedge block to drop sharply. As a result, the braking effect of traditional safety clamps on the elevator car falling will continue to decrease as the temperature rises. 2. The wedge-shaped brake block used in the existing elevator safety clamp has a flat surface. It can only rely on its own abrasive surface to rub against the guide rail to achieve braking. However, the flat braking surface is not conducive to increasing friction, and therefore cannot achieve a stable braking effect on the elevator.

[0004] Therefore, we propose a braking-stabilized elevator safety clamp to solve the existing problems. Utility Model Content

[0005] The purpose of this invention is to provide a stable and braking elevator safety clamp to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a braking and stable elevator safety clamp, comprising a housing, a guide rail and a wedge block, wherein the housing has a U-shaped hollow structure, and a fixing frame is installed on the back of the housing by bolts, and two sets of rollers are rotatably installed on the inner side of the housing; The housing is equipped with a guide rail that is movably mounted inside, and the guide rail is in contact with the roller. The housing contains wedge-shaped blocks that are movably mounted on both sides of the guide rail.

[0007] Preferably, hydraulic pipe connectors are fixedly installed on both sides of the top of the housing, and several ventilation holes are provided on both sides of the bottom of the housing.

[0008] Preferably, the side of the wedge block closest to the guide rail is an inclined surface, and the width of the top of the wedge block is greater than the width of the bottom.

[0009] Preferably, the wedge block has several air guide grooves on the side near the guide rail, and the side of the wedge block away from the air guide grooves is fitted with a mounting base by bolts.

[0010] Preferably, two sets of springs are fixedly installed between the mounting base and the inner wall of the housing, and two sets of pistons are also fixedly installed between the mounting base and the inner wall of the housing.

[0011] Preferably, the pistons are installed horizontally, and the two sets of pistons are on the same longitudinal axis.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model has ventilation holes at the bottom of the shell, which can introduce air into the shell when the elevator is falling rapidly, and then allow the hot air to be discharged from the front of the shell. The air blows over the two sets of wedge blocks, which has a cooling effect on the wedge blocks. This ensures that the wedge blocks can maintain a relatively stable braking force when they rub against the guide rail, and prevents the braking effect of the wedge blocks from gradually decreasing and affecting the safety of the elevator during emergency braking.

[0013] 2. This utility model provides several air guide grooves on the inclined surface of the wedge block. On the one hand, it can increase the contact area between the airflow and the wedge block and improve the heat dissipation effect of the wedge block. On the other hand, it can divide the inclined surface of the wedge block into several small blocks, thereby improving the friction braking effect between the wedge block and the guide rail, thus satisfying the stable braking effect of the safety clamp on the elevator. Attached Figure Description

[0014] Figure 1 This is a first three-dimensional front view of the present invention; Figure 2 This is a schematic diagram of the second three-dimensional front structure of the present invention; Figure 3 This is a three-dimensional back view of the present invention; Figure 4 This is a partial three-dimensional structural diagram of the present invention.

[0015] In the diagram: 1. Housing; 101. Fixing frame; 102. Hydraulic pipe connector; 103. Roller; 104. Ventilation hole; 2. Guide rail; 3. Wedge block; 301. Mounting base; 302. Spring; 303. Piston; 304. Air guide channel. Detailed Implementation

[0016] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0017] like Figure 1 - Figure 4As shown, the present invention proposes a braking and stabilizing elevator safety clamp, comprising a housing 1, a guide rail 2, and a wedge block 3. The housing 1 has a U-shaped hollow structure, and a fixing frame 101 is bolted to the back of the housing 1. Two sets of rollers 103 are rotatably mounted on the inner side of the housing 1. The housing 1 can be fixedly installed on the outside of the elevator car, so as to move vertically with the elevator car. The housing 1 can also provide mounting positions for surrounding components. The fixing frame 101 can cooperate with the bolts to fix the housing 1, thereby installing the housing 1 and its surrounding components on the outside of the elevator car. The rollers 103 can contact the two sides of the guide rail 2, thereby avoiding direct friction between the guide rail 2 and the housing 1, which would cause wear on the guide rail 2 and the housing 1. The housing 1 has a guide rail 2 installed inside, and the guide rail 2 is in contact with the roller 103. The guide rail 2 can guide the vertical movement of the safety clamp and the elevator, so that the elevator can move stably along the guide rail 2 and avoid twisting and shaking during the movement of the elevator. Inside the housing 1, wedge blocks 3 are movably installed on both sides of the guide rail 2. When the elevator falls rapidly, the wedge blocks 3 can be pushed by the piston 303 to bring the wedge blocks 3 close to the guide rail 2 and make contact with the guide rail 2 to achieve friction braking of the elevator, reduce the falling speed of the elevator, and avoid the elevator falling from a height and causing injury or death to the people inside the elevator.

[0018] Furthermore, hydraulic pipe connectors 102 are fixedly installed on both sides of the top of the housing 1, and several ventilation holes 104 are opened on both sides of the bottom of the housing 1. The hydraulic connectors can connect the hydraulic controller and the piston 303 through conduits, so that the piston 303 can communicate with the external hydraulic controller. When the safety clamp needs to work, it can contact the hydraulic controller to inject hydraulic oil into the piston 303, so that the piston 303 pushes the wedge block 3 to move, and then uses the wedge block 3 to brake the guide rail 2. The ventilation holes 104 can allow the airflow at the bottom of the housing 1 to enter the interior of the housing 1, thereby achieving rapid cooling of the interior of the housing 1, ensuring that the wedge block 3 can maintain a relatively stable braking effect when it is frictionally braking with the guide rail 2, and preventing the temperature of the wedge block 3 from rising sharply, causing a decrease in braking force and affecting the braking stability of the safety clamp for the elevator.

[0019] Furthermore, the wedge block 3 has an inclined surface on the side near the guide rail 2, and the width of the top of the wedge block 3 is greater than the width of the bottom. The wedge block 3 adopts a shape that is wider at the top and narrower at the bottom, which enables the wedge block 3 to have a gradual braking effect on the guide rail 2, thereby avoiding damage to the elevator when it is suddenly subjected to a large braking force. It can also provide a more comfortable braking effect for the people inside the elevator.

[0020] Furthermore, a number of air guide grooves 304 are provided on the side of the wedge block 3 near the guide rail 2, and a mounting base 301 is installed on the side of the wedge block 3 away from the air guide grooves 304 by bolts. The air guide grooves 304 can improve the braking effect of the wedge block 3 and allow airflow to flow through the inside of the air guide grooves 304, thereby improving the braking stability of the wedge block 3 for the elevator under high load conditions.

[0021] Furthermore, two sets of springs 302 are fixedly installed between the mounting base 301 and the inner wall of the housing 1, and two sets of pistons 303 are also fixedly installed between the mounting base 301 and the inner wall of the housing 1. When the piston 303 retracts, the springs 302 can push the wedge block 3 to reset, so as to facilitate subsequent maintenance of the wedge block 3 and release the braking effect on the elevator. The piston 303 can extend and retract, thereby driving the wedge block 3 to move horizontally inside the housing 1, so as to control the degree of contact between the wedge block 3 and the guide rail 2 and realize the braking of the elevator.

[0022] Furthermore, the piston 303 is installed horizontally, and the two sets of pistons 303 are on the same longitudinal axis.

[0023] Working principle: After the device is clipped onto the outside of the guide rail 2, it is fixed to the outside of the elevator car with bolts. The hydraulic controller is connected to the hydraulic pipe connector 102 through a conduit, so that the hydraulic controller is connected to the piston 303. When the elevator falls, the hydraulic controller pumps hydraulic oil into the piston 303, causing the piston 303 to extend and push the wedge block 3 to move. The wedge block 3 moves in the direction of the guide rail 2 and contacts the guide rail 2 to achieve friction braking, reduce the falling speed of the elevator car and stop it. During the braking process, the airflow enters the interior of the housing 1 through the ventilation hole 104, contacts the wedge block 3, and then exits from the front of the housing 1, so that the wedge block 3 can maintain the braking effect during emergency braking and avoid thermal fade that affects the braking stability of the safety clamp.

[0024] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A brake-stable elevator safety gear comprising a housing (1), a guide rail (2) and a wedge (3), characterized in that: The shell (1) is a U-shaped hollow structure, and a fixing frame (101) is installed on the back of the shell (1) by bolts. Two sets of rollers (103) are rotatably installed on the inner side of the shell (1). The housing (1) is movably mounted with a guide rail (2), and the guide rail (2) is in contact with the roller (103); Inside the housing (1), wedge blocks (3) are movably installed on both sides of the guide rail (2).

2. A brake-stable elevator safety gear according to claim 1, characterized in that Hydraulic pipe connectors (102) are fixedly installed on both sides of the top of the housing (1), and several ventilation holes (104) are opened on both sides of the bottom of the housing (1).

3. A brake-stable elevator safety gear according to claim 1, characterized in that: The wedge block (3) has an inclined surface on the side near the guide rail (2), and the width of the top of the wedge block (3) is greater than the width of the bottom.

4. A brake-stable elevator safety gear according to claim 1, characterized in that: The wedge block (3) has several air guide grooves (304) on the side near the guide rail (2), and the wedge block (3) away from the air guide grooves (304) is fitted with a mounting base (301) by bolts.

5. The braking and stabilizing elevator safety clamp according to claim 4, characterized in that: Two sets of springs (302) are fixedly installed between the mounting base (301) and the inner wall of the housing (1), and two sets of pistons (303) are also fixedly installed between the mounting base (301) and the inner wall of the housing (1).

6. The braking and stabilizing elevator safety clamp according to claim 5, characterized in that: The piston (303) is installed horizontally, and the two sets of pistons (303) are on the same longitudinal axis.

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