Spring and safety clamp

Abstract

The application discloses a spring and safety tongs, the spring comprises a spring body, the spring body is integrally formed and sequentially fixedly connected with a positive pressure part, a side abutting part and a limiting part; the safety tongs comprises a tongs body integrally formed, a top plate, a bottom plate and a first side plate, and a first space for accommodating the spring body is formed between the top plate, the bottom plate and the first side plate; the safety tongs further comprises a clamping device, the clamping device comprises a first clamping assembly and a second clamping assembly which are respectively arranged on two sides of an elevator guide rail, the first clamping assembly is connected with the spring body, and the second clamping assembly is moved by a lifting assembly to be close to the first clamping assembly for clamping the elevator guide rail; the spring provided by the application is more stable in use, the integrally formed structure increases the strength of the spring body, compared with a disc spring, the force value of the spring is stable, repeated adjustment is not needed, the occupied space in the tongs body is small, so that material and cost can be saved, and the spring is suitable for batch production.

Claims

1. A spring used in an elevator safety clamp, wherein when the elevator is braked, the spring force pushes the clamping device of the safety clamp to clamp the elevator guide rail, characterized in that, The spring includes: A spring body (1), the spring body (1) is in a "ji" - shaped structure, which has a positive pressure part (2), a side abutting part (3) and a limiting part (4) that are integrally formed and fixedly connected in sequence. The positive pressure part (2) is located in the middle position, and the side abutting part (3) and the limiting part (4) are symmetrically arranged on both sides thereof; A first through - hole (5) is formed on the positive pressure part (2) for arranging a mounting member (6) to connect with the clamping device.

2. A spring according to claim 1, characterized in that, The positive pressure part (2) is a straight section or a curved section or a combination of a straight section and a curved section, and the limiting part (4) is a straight section or a curved section or a combination of a straight section and a curved section.

3. A spring according to claim 1, characterized in that, A limiting groove (7) is formed on the limiting part (4) for cooperating with the limiting protrusion (8) of the safety clamp to prevent the displacement or rotation of the spring body (1).

4. A safety clamp, wherein the spring described in any one of claims 1-3 is used, characterized in that, The safety clamp includes: A clamp body (9), the clamp body (9) includes a top plate (10), a bottom plate (11), a back plate (12), a first side plate (13) and a second side plate (14) that are integrally formed. A first space is formed between the top plate (10), the bottom plate (11) and the first side plate (13) for accommodating the spring body (1); A second space is formed between the first side plate (13) and the second side plate (14) for the elevator guide rail to pass through, and the elevator guide rail extends along the first direction; A clamping device, the clamping device includes a first clamping component and a second clamping component. The first clamping component and the second clamping component are respectively located on both sides of the elevator guide rail. The first clamping component is connected to the spring body (1), and the second clamping component moves through a lifting component to approach the first clamping component for clamping the elevator guide rail.

5. A safety clamp according to claim 4, characterized in that, The first clamping component includes: A first braking wedge (15), the first braking wedge (15) is arranged on the side of the spring body (1) close to the elevator guide rail and is connected to the spring body (1) through a mounting member (6). Anti - slip grooves (16) are arranged on the side wall of the first braking wedge (15) close to the elevator guide rail.

6. A safety clamp according to claim 5, characterized in that, A second through - hole (17) communicating with the first space is formed on the first side plate (13). A third through - hole (18) is formed through the first braking wedge (15). The mounting member (6) sequentially passes through the second through - hole (17) and the first through - hole (5) and extends into the third through - hole (18), and is fixedly connected to the first braking wedge (15).

7. A safety clamp according to claim 6, characterized in that, The side wall of the second side plate (14) close to the elevator guide rail is an inclined surface, and a first included angle is formed between its extending direction and the first direction. The second clamping component includes: A guide plate (19), the guide plate (19) is arranged on the side wall of the second side plate (14) far from the back plate (12). A guide groove (20) parallel to the inclined surface is formed on the guide plate (19); A second braking wedge (21), the second braking wedge (21) is movably arranged on the inclined surface. Anti - slip grooves (16) are arranged on the side wall of the second braking wedge (21) close to the elevator guide rail; A needle roller array (22) is movably disposed between the inclined surface and the second brake wedge (21) to reduce the friction between the second brake wedge (21) and the second side plate (14).

8. A safety clamp according to claim 7, characterized in that, The lifting component includes: The top of the lifting rod (23) is connected to the elevator speed limiter, and the bottom of the lifting rod (23) is provided with a connecting block (24). The connecting block (24) and the guide groove (20) are slidably engaged and fixedly connected with the second brake wedge (21).

9. A safety clamp according to claim 7, characterized in that, The top plate (10) is provided with a limiting block (26) for adjusting the moving distance of the second brake wedge (21) and limiting the second brake wedge (21).

10. A safety clamp according to claim 8, characterized in that, The bottom of the guide plate (19) is provided with an elastic element (27). The end of the elastic element (27) away from the guide plate (19) is connected to the needle roller row (22). The elastic force of the elastic element (27) is used to drive the needle roller row (22) to reset.

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