Brake structure of safety tongs and elevator safety tongs
By using a gasket as an intermediate part in the elevator safety pliers, and matching the end faces of the U-shaped spring and the guidance block, surface contact is achieved, which solves the problems of unstable output of the U-shaped spring force value and high cost in the prior art, and improves the braking performance and product competitiveness of the safety pliers.
Patent Information
- Application Number
- CN202420789066.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-04-16
AI Technical Summary
Among the existing elevator safety pliers, the contact method between the U-shaped spring and the guide block has the problem of unstable force output, and the surface contact method requires additional processing of the U-shaped spring, which increases the cost.
A braking structure including a U-shaped spring, a guide block and a gasket is adopted. The gasket is used as an intermediate part and the end faces of the guide block and the U-shaped spring are matched to achieve surface contact between the guide block and the U-shaped spring.
It improves the stability of the U-shaped spring force value output, enhances the braking performance of the safety clamp, reduces production costs, and improves the competitiveness of the product.
Smart Images
Figure CN222757712U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of elevator braking equipment, and in particular relates to a braking structure of a safety clamp and an elevator safety clamp. Background Art
[0002] The elevator safety clamp is one of the safety components in the elevator safety protection system. The elevator safety clamp device is a safety device that stops the car and clamps it on the guide rail when the elevator speed exceeds the speed limit set by the elevator speed limiter or when the suspension rope breaks or loosens under the control of the speed limiter. It provides effective protection for the safe operation of the elevator. According to different elevator types or installation space requirements, it is generally installed on the car frame or counterweight frame.
[0003] There are two ways for the guide block and the U-shaped spring in the existing elevator safety clamps: the first is that the curved wall of the guide block contacts the plane wall of the U spring, which is a line contact; the other is that the plane where the U-shaped spring contacts the guide block is further processed into a curved surface, which is a surface contact. When the U-shaped spring is opened to the rated opening amount, the force output of the U-shaped spring on the guide block in the first contact method is unstable. The second method requires further processing of the straight wall of the U-shaped spring to achieve surface contact, but it will increase costs and reduce product competitiveness. Utility Model Content
[0004] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide a braking structure of a safety pliers.
[0005] The technical solution adopted by the utility model to solve its technical problems is:
[0006] A braking structure of a safety pliers comprises a U-shaped spring, a guide block and a gasket;
[0007] There is a space area between the U-shaped spring and the guide block. When the U-shaped spring is opened to the rated amount, the guide block is completely fitted with one end surface of the gasket, and the U-shaped spring is completely fitted with the other end surface of the gasket.
[0008] Preferably, one end surface of the gasket is a concave arc surface structure, and the other end surface of the gasket is a flat structure.
[0009] Preferably, when the U-shaped spring is in an initial state, the angle formed between the other end surface of the gasket and the contact surface of the U-shaped spring is set to a first angle, and when the U-shaped spring is opened to a rated amount, the angle between the center of the guide block and the contact surface of the U-shaped spring is set to a second angle, and the values of the first angle and the second angle are the same.
[0010] Preferably, the radius of the concave arc surface of one end surface of the gasket is consistent with the radius of the circular arc surface of the guide block.
[0011] Preferably, the gasket is provided with a connecting hole, and the connecting hole is provided with a connecting piece for connecting the gasket and the guide block.
[0012] Preferably, the cross section of the gasket is a trapezoidal structure with a small end and a large end, the other end face of the gasket is between the small end and the large end, and the large end of the gasket is at the opening of the U-shaped spring.
[0013] The utility model also discloses an elevator safety clamp, comprising a safety clamp seat, wherein the safety clamp seat is provided with the above-mentioned braking structure of the safety clamp.
[0014] Preferably, a connecting piece is provided on the safety clamp seat, a connecting hole is provided on the gasket, and the connecting piece fixes the gasket to the guide block through the connecting hole.
[0015] Compared with the prior art, the beneficial effects of the utility model include:
[0016] The braking structure of the safety clamp of the present application adopts a gasket structure as the intermediate part where the guide block contacts the U-shaped spring. By cooperating with the end faces of the guide block and the U-shaped spring, a surface contact structure between the guide block and the U-shaped spring is achieved, which can improve the stability of the force output of the U-shaped spring, thereby improving the braking performance of the safety clamp. At the same time, there is no need for additional processing of the end face of the U-shaped spring, thereby reducing production costs and enhancing product competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 It is a schematic diagram of a U-shaped spring of the brake structure of the safety tongs of the utility model in an initial state.
[0019] Figure 2 It is a schematic diagram of a U-shaped spring of the brake structure of the safety clamp of the utility model when it is opened to the rated amount.
[0020] Figure 3 It is a schematic diagram of the gasket of the utility model.
[0021] in:
[0022] 1-U-shaped spring, 2-guide block, 3-gasket, 4-concave arc surface, 5-flat surface, 6-connecting hole. DETAILED DESCRIPTION
[0023] In order to more clearly understand the above-mentioned purposes, features and advantages of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the utility model, and the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.
[0025] Example:
[0026] like Figure 1-3 As shown, in this embodiment, a braking structure of a safety pliers is provided, comprising a U-shaped spring 1, a guide block 2 and a gasket 3;
[0027] There is a space area between the U-shaped spring 1 and the guide block 2. When the U-shaped spring 1 is opened to the rated amount, the guide block 2 is completely in contact with one end surface of the gasket 3, and the U-shaped spring 1 is completely in contact with the other end surface of the gasket 3.
[0028] The braking structure of the safety clamp of the present embodiment adopts a gasket 3 structure as the intermediate part where the guide block 2 contacts the U-shaped spring 1. By cooperating with the end faces of the guide block 2 and the U-shaped spring 1, a surface contact structure between the guide block 2 and the U-shaped spring 1 is achieved, which can improve the stability of the force output of the U-shaped spring 1, thereby improving the braking performance of the safety clamp. At the same time, there is no need to additionally process the end face of the U-shaped spring 1, thereby reducing production costs and enhancing product competitiveness.
[0029] In this embodiment, one end surface of the gasket 3 is a concave arc surface 4 structure, and the other end surface of the gasket 3 is a flat surface 5 structure.
[0030] Specifically, when the U-shaped spring 1 is in the initial state, the angle formed between the other end surface of the gasket 3 and the contact surface of the U-shaped spring 1 is set to a first angle, and when the U-shaped spring 1 is opened to a rated amount, the angle between the center of the guide block 2 and the contact surface of the U-shaped spring 1 is set to a second angle, and the values of the first angle and the second angle are the same.
[0031] Specifically, the radius of the concave arc surface 4 on one end surface of the gasket 3 is consistent with the radius of the circular arc surface of the guide block 2 .
[0032] Specifically, the gasket 3 is provided with a connecting hole 6 , and the connecting hole 6 is provided with a connecting piece for connecting the gasket 3 and the guide block 2 .
[0033] Specifically, the cross section of the gasket 3 is a trapezoidal structure with a small end and a large end, the other end surface of the gasket 3 is between the small end and the large end, and the large end of the gasket 3 is at the opening of the U-shaped spring 1.
[0034] According to the above structure, the safety caliper braking performance can be effectively improved:
[0035] First, the radius of the concave arc surface 4 of the gasket 3 is kept consistent with the radius of the circular arc surface of the guide block 2, effectively ensuring that the guide block 2 and the gasket 3 achieve surface-to-surface contact;
[0036] Secondly, according to the different specifications of the U-shaped spring 1, the values θ of the first angle and the second angle are determined, so as to determine the appropriate value of the end face width L of the gasket 3 to ensure that when the U-shaped spring 1 is opened to the designed maximum value, the gasket 3 and the U-shaped spring 1 are in surface-to-surface contact;
[0037] Again, between the contact between the gasket 3 and the U-shaped spring 1, gaskets 3 can be further added according to actual needs;
[0038] The final principle is:
[0039] When the safety clamp is actuated, the U-shaped spring 1 instantly changes from a natural state to a state of maximum opening, and the guide block 2 and the gasket 3, as well as the gasket 3 and the U-shaped spring 1 maintain surface-to-surface contact. The elastic force generated by the deformation of the U-shaped spring 1 reacts on the gasket 3 and is transmitted to the guide block 2 via the gasket 3. At this time, since the arc radius of the gasket 3 is consistent with the arc radius of the guide block 2, a surface-to-surface contact effect is achieved. Compared with the previous contact method, the U-shaped spring 1 has a greater component of force perpendicular to the working surface of the guide rail at the same opening amount, and thus a greater force is transmitted to the wedge block to clamp the guide rail, thereby improving the braking performance of the safety clamp.
[0040] This embodiment also discloses an elevator safety clamp, including a safety clamp seat, in which the above-mentioned braking structure of the safety clamp is arranged.
[0041] Specifically, a connecting piece is provided on the safety clamp seat, and a connecting hole 6 is provided on the gasket 3 . The connecting piece fixes the gasket 3 to the guide block 2 through the connecting hole 6 .
[0042] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Therefore, any modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention are still within the scope of the technical solution of the present invention.
Claims
1. A braking structure of a safety tongs, characterized in that: include: U-springs, guide blocks and washers; There is a space area between the U-shaped spring and the guide block. When the U-shaped spring is opened to the rated amount, the guide block is completely fitted with one end surface of the gasket, and the U-shaped spring is completely fitted with the other end surface of the gasket.
2. The brake structure of the safety clamp according to claim 1, characterized in that: One end surface of the gasket is a concave arc surface structure, and the other end surface of the gasket is a flat surface structure.
3. The brake structure of the safety clamp according to claim 2, characterized in that: When the U-shaped spring is in an initial state, the angle formed between the other end surface of the gasket and the contact surface of the U-shaped spring is set to a first angle. When the U-shaped spring is opened to a rated amount, the angle between the center of the guide block and the contact surface of the U-shaped spring is set to a second angle. The values of the first angle and the second angle are the same.
4. The brake structure of the safety clamp according to claim 3, characterized in that: The radius of the concave arc surface of one end surface of the gasket is consistent with the radius of the circular arc surface of the guide block.
5. The brake structure of the safety clamp according to claim 3, characterized in that: The gasket is provided with a connecting hole, and the connecting hole is provided with a connecting piece for connecting the gasket and the guide block.
6. The brake structure of the safety clamp according to claim 3, characterized in that: The cross section of the gasket is a trapezoidal structure with a small end and a large end. The other end surface of the gasket is located between the small end and the large end, and the large end of the gasket is located at the opening of the U-shaped spring.
7. An elevator safety clamp, characterized in that: It comprises a safety clamp seat, in which the braking structure of the safety clamp according to any one of claims 1 to 6 is arranged.
8. The elevator safety clamp according to claim 7, characterized in that: The safety clamp seat is provided with a connecting piece, the gasket is provided with a connecting hole, and the connecting piece fixes the gasket to the guide block through the connecting hole.