Safety clamp and elevator

Abstract

The present invention relates to a safety clamp and an elevator. The safety clamp includes a clamp body, which has a guide rail channel, and also includes a brake member and a fixed wedge installed on the clamp body. The brake member and the fixed wedge are respectively located on both sides of the guide rail channel; the fixed wedge is abutted against the clamp body through a leaf spring, and the leaf spring is located on the side of the fixed wedge facing away from the brake member; wherein a slide is provided between the fixed wedge and the leaf spring, and the fixed wedge is slidably fitted on the slide, the upper part of the slide abuts against a positive pressure adjustment member provided on the clamp body, and the lower part of the slide abuts against an elastic member provided on the clamp body, and the positive pressure adjustment member movably fits with the clamp body to drive the slide to vertically displace, thereby linking the fixed wedge and adjusting the positive pressure when the fixed wedge and the elevator guide rail are braked. The safety clamp of the present invention utilizes the positive pressure adjustment member to movably fit with the clamp body to drive the slide to vertically displace, thereby linking the fixed wedge and adjusting the positive pressure when the fixed wedge and the elevator guide rail are braked, without the need to replace the pad.

Description

Technical Field

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

[0002] A slide is provided between the fixed wedge and the leaf spring of the existing safety clamp, and the fixed wedge is slidably fitted on the slide. If the positive pressure between the fixed wedge and the elevator guide rail is to be adjusted, a spacer needs to be added between the slide and the leaf spring, which has the disadvantage of being inconvenient to adjust. Moreover, after the spacer is installed, it cannot be freely adjusted according to the actual application conditions and can only be replaced, which makes assembly and debugging or on-site adjustment extremely inconvenient. Summary of the Invention

[0003] Based on the above-mentioned shortcomings in the prior art, an object of the present invention is to provide a safety gear.

[0004] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

[0005] A safety clamp comprises a clamp body, which has a guide rail channel, and also comprises a brake member and a fixed wedge mounted on the clamp body, wherein the brake member and the fixed wedge are respectively located on both sides of the guide rail channel; the fixed wedge is abutted against the clamp body through a leaf spring, and the leaf spring is located on the side of the fixed wedge facing away from the brake member; wherein a slide is provided between the fixed wedge and the leaf spring, and the fixed wedge is slidably fitted on the slide, the upper part of the slide abuts against a positive pressure adjustment member provided on the clamp body, and the lower part of the slide abuts against an elastic member provided on the clamp body, and the positive pressure adjustment member is movably fitted with the clamp body to drive the slide to vertically displace, thereby linking the fixed wedge and adjusting the positive pressure of the fixed wedge and the elevator guide rail during braking.

[0006] As a preferred solution, the elastic member is an elastic rod.

[0007] As a preferred solution, the top of the elastic rod has a spherical structure or a flat structure in contact with the sliding seat.

[0008] As a preferred solution, the sliding contact surface between the fixed wedge block and the sliding seat is an inclined surface, and a wear-reducing member is provided between the fixed wedge block and the sliding seat.

[0009] As a preferred solution, a spacer is provided between the slide seat and the leaf spring.

[0010] As a preferred solution, the clamp body is provided with a cover plate corresponding to the fixed wedge block, and the cover plate has a transverse limit groove. Correspondingly, the cushion block has a transverse lug that is plugged into the transverse limit groove, so that the cushion block can only move transversely.

[0011] As a preferred solution, the two ends of the fixed wedge block along the guide rail channel direction respectively abut against the clamp body and the displacement reset mechanism, and the displacement reset mechanism is used to provide the fixed wedge block with a displacement stroke when the safety clamp is reset and to reset the fixed wedge block after displacement.

[0012] As a preferred solution, the displacement reset mechanism includes a guide post and a compression spring, the top end of the guide post abuts against the fixed wedge block, and the bottom end passes through the caliper body; the compression spring is sleeved outside the guide post, and its two ends abut against the fixed wedge block and the caliper body respectively;

[0013] The guide column and the fixed wedge block are coordinated.

[0014] As a preferred solution, the braking member is a braking roller or a braking wedge.

[0015] The present invention also provides an elevator, which adopts the safety clamp as described in any of the above solutions.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) The safety clamp of the present invention utilizes a positive pressure adjustment member that is movably engaged with the clamp body to drive the vertical displacement of the slide, thereby linking the fixed wedge block and adjusting the positive pressure of the fixed wedge block and the elevator guide rail during braking, without the need to replace the pad block;

[0018] (2) The top of the elastic rod of the present invention has a spherical structure in contact with the slide seat, which adaptively adjusts the contact surface between the fixed wedge block and the elevator guide rail;

[0019] (3) The fixed wedge block of the present invention is provided with a corresponding displacement reset mechanism, which makes the reset force of the safety clamp smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a safety gear according to embodiment 1 of the present invention;

[0021] Figure 2 2 is a schematic structural diagram of the safety gear of embodiment 1 of the present invention from another perspective;

[0022] Figure 3 yes Figure 2 sectional view of the AA portion in FIG (omitted part);

[0023] Figure 4 1 is a schematic structural diagram of a clamp body according to embodiment 1 of the present invention;

[0024] Figure 5 Schematic diagram of the structure of the safety gear of embodiment 1 of the present invention (right cover plate omitted). DETAILED DESCRIPTION

[0025] To more clearly illustrate the embodiments of the present invention, specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other embodiments can be obtained based on these drawings without inventive efforts.

[0026] Example 1:

[0027] like Figures 1 to 5 As shown, the safety pliers of this embodiment includes a pliers body 1, a brake roller 2, a left cover plate 3, a fixed wedge 4, a ball retainer 5, a slide 6, a strip leaf spring 7 and a right cover plate 8.

[0028] Specifically, the caliper body 1 has a vertically extending guide rail channel 10. The caliper body 1 is located on the left and right sides of the guide rail channel 10 to form a first recess I and a second recess II. The first recess I is used to install the brake roller 2, and the second recess II is used to install the fixed wedge 4, the ball retainer 5, the slide 6 and the strip spring 7, so that the brake roller 2 and the fixed wedge 4 are respectively located on the left and right sides of the guide rail channel 10 to cooperate with the elevator guide rail brake.

[0029] The front side of the first recess I of the caliper body 1 is open. A left cover plate 3 is provided on the front side of the opening, corresponding to the brake roller 2. The left cover plate 3 has a guide groove 30. The rear side of the brake roller 2 is in contact with the inner wall of the caliper body 1, and is guided by the inner wall of the caliper body 1. This large guide area ensures smooth rolling of the brake roller 2. The axle on the front side of the brake roller 2 is inserted into the guide groove 30 to achieve a guiding fit. The brake roller 2 movably fits in the guide groove 30 to engage or release the brake on the elevator guide rail 0. Furthermore, the caliper body 1 has a raceway 11 for rolling engagement with the brake roller 2. The raceway 11 has convex shoulders on either side. Accordingly, the brake roller 2 has a structure with a convex center and concave sides. The concave sides contact the two convex shoulders of the caliper body and can move upward along the guide track to contact the guide rail. The raceway 11 provides support for the brake roller 2, ensuring that the brake roller 2 is in a rolling state. Compared to a sliding state, the brake roller 2 has less wear and a longer life. The convex portion of the brake roller 2 may be cylindrical, waisted or segmented, and its surface may be knurled, grooved or otherwise provided with friction-enhancing features to enhance self-locking reliability.

[0030] The fixed wedge 4's two ends along the guide rail channel, namely its upper and lower ends, respectively abut the top wall of the second recess II of the caliper body and a displacement reset mechanism mounted on the bottom wall of the second recess II of the caliper body. The fixed wedge 4 abuts the right side wall of the second recess II of the caliper body via a strip leaf spring 7. The strip leaf spring 7 is located on the side of the fixed wedge 4 facing away from the brake roller, i.e., on the right side of the fixed wedge 4. The upper and lower ends of the strip leaf spring 7 respectively abut the caliper body, while the remaining portion of the strip leaf spring 7 is hollowed out at the corresponding position of the caliper body to ensure sufficient deformation of the strip leaf spring 7.

[0031] In addition, a slide 6 is provided between the fixed wedge 4 and the strip spring 7. The fixed wedge 4 slides in engagement with the slide 6, reducing the reset force and stability of the safety gear. The sliding contact surface between the fixed wedge 4 and the slide 6 is an inclined surface, meaning both the fixed wedge 4 and the slide 6 are wedge structures.

[0032] In this embodiment, a ball cage 5 is further provided between the fixed wedge 4 and the slide 6 to further reduce the reset force and reset stability of the safety clamp. In addition, a spacer D is provided between the slide 6 and the strip spring 7 to adjust the positive pressure between the fixed wedge and the elevator guide rail.

[0033] The top of the slide 6 of this embodiment abuts against the positive pressure adjustment part L installed on the top of the second recess II of the caliper body, and the bottom of the slide 6 abuts against the elastic rod H installed on the bottom of the second recess II of the caliper body. The positive pressure adjustment part L movably cooperates with the caliper body to drive the slide 6 to vertically displace, thereby linking the fixed wedge block 4 to move horizontally, thereby realizing the positive pressure adjustment between the fixed wedge block and the elevator guide rail.

[0034] Among them, the elastic rod H can be set as an automatic telescopic structure, or an adjustment mechanism can be set to match the adjustment part L to achieve the adjustment limit retention of the slide. Its top has a spherical structure O that contacts the slide 6, or it can be a curved or flat structure, which can adaptively adjust the contact surface between the fixed wedge block and the elevator guide rail to improve the braking stability.

[0035] In this embodiment, the positive pressure adjustment member L is a screw or threaded rod that is threaded into the mounting hole L1 of the caliper body. The positive pressure can be adjusted by rotating the positive pressure adjustment member. Its end can be spherical or curved to allow the wedge to adapt to the contact surface of the guide rail, thereby improving braking stability.

[0036] The front side opening of the second recess II of the caliper body 1 of this embodiment is provided with a right cover plate 8 corresponding to the fixed wedge block 4, the ball retainer 5, the slide seat 6 and the strip leaf spring 7. The right cover plate 8 has a transverse limit groove 80, and the pad D has a transverse lug D1 that is plugged into and guided by the transverse limit groove 80 to guide and limit the pad D in the direction perpendicular to the guide rail channel (i.e., the horizontal direction) (i.e., the vertical direction).

[0037] The design of the displacement reset mechanism of this embodiment can not only reduce the reset force of the safety clamp, but also reset the displacement of the fixed wedge along the guide rail channel after the safety clamp is reset. Specifically, the displacement reset mechanism includes a guide post 12 and a compression spring 13. The upper end of the guide post 12 is plugged into the fixed wedge 4, and the lower end of the guide post 12 passes through the avoidance hole 100 on the bottom wall of the second recess of the caliper body; the compression spring 13 is sleeved outside the guide post 12, and the upper and lower ends of the compression spring 13 respectively abut against the fixed wedge 4 and the bottom wall of the second recess II of the caliper body or the inner bend 81 of the right cover plate 8. Among them, the guide post 12 and the fixed wedge 4 are linked and matched to move along the extension direction of the guide rail channel, that is, the guide post 12 is movably matched with the caliper body.

[0038] The principle of the safety gear adjusting the positive pressure in this embodiment is as follows:

[0039] Rotate the positive pressure adjustment piece, which presses down the slide. The slide moves downward and drives the fixed wedge to move left, thereby adjusting the positive pressure when the fixed wedge and the elevator guide rail are braked. During the reset process, only a small reset force is needed to move the fixed wedge downward, so that the fixed wedge is separated from the elevator guide rail. The moved fixed wedge returns to its original position under the reset action of the displacement reset mechanism.

[0040] The elevator of this embodiment adopts the safety clamp of this embodiment, and has better braking stability.

[0041] Example 2:

[0042] The safety gear of this embodiment is different from that of embodiment 1 in that:

[0043] The setting of the pad is omitted, the structure is simplified, and the needs of different applications are met; the stiffness of the leaf spring can also be adjusted according to the length of the pad to meet the needs of different braking qualities.

[0044] For other structures, please refer to Example 1.

[0045] The elevator of this embodiment adopts the safety gear of this embodiment.

[0046] Example 3:

[0047] The safety gear of this embodiment is different from that of embodiment 1 in that:

[0048] The brake roller can also be replaced with a brake wedge structure to meet the needs of different applications;

[0049] For other structures, please refer to Example 1.

[0050] The elevator of this embodiment adopts the safety gear of this embodiment.

[0051] The above description is only a detailed description of the preferred embodiments and principles of the present invention. For ordinary technicians in this field, based on the ideas provided by the present invention, there may be changes in the specific implementation methods, and these changes should also be considered as the scope of protection of the present invention.

Claims

1. A safety pliers comprising a pliers body having a guide rail channel, a brake member and a fixed wedge mounted on the pliers body, the brake member and the fixed wedge being located on either side of the guide rail channel; the fixed wedge being abutted against the pliers body by a leaf spring, the leaf spring being located on a side of the fixed wedge facing away from the brake member; wherein: A slide is provided between the fixed wedge and the leaf spring, and the fixed wedge is slidably fitted on the slide. The feature is that the upper portion of the slide abuts against a positive pressure adjustment member provided on the caliper body, and the lower portion of the slide abuts against an elastic member provided on the caliper body. The positive pressure adjustment member movably fits with the caliper body to drive the slide to vertically displace, thereby linking the fixed wedge to adjust the positive pressure of the fixed wedge and the elevator guide rail during braking.

2. A safety gear according to claim 1, characterized in that: The elastic member is an elastic rod.

3. A safety gear according to claim 2, characterized in that: The top of the elastic rod has a spherical surface or a flat surface structure in contact with the sliding seat.

4. A safety gear according to any one of claims 1 to 3, characterized in that: The sliding contact surface between the fixed wedge block and the sliding seat is an inclined surface, and a wear-reducing part is provided between the fixed wedge block and the sliding seat.

5. A safety gear according to any one of claims 1 to 3, characterized in that: A cushion block is provided between the sliding seat and the leaf spring.

6. A safety gear according to claim 5, characterized in that: The clamp body is provided with a cover plate corresponding to the fixed wedge block, and the cover plate has a transverse limit groove. Correspondingly, the cushion block has a transverse lug that is plugged into and matched with the transverse limit groove, so that the cushion block can only move transversely.

7. A safety gear according to any one of claims 1 to 3, characterized in that: The two ends of the fixed wedge along the guide rail channel direction are respectively in contact with the clamp body and the displacement reset mechanism, and the displacement reset mechanism is used to provide a displacement stroke for the fixed wedge when the safety clamp is reset and to reset the fixed wedge after displacement.

8. A safety gear according to claim 7, characterized in that: The displacement reset mechanism includes a guide post and a compression spring. The top end of the guide post abuts against the fixed wedge block, and the bottom end passes through the caliper body. The compression spring is sleeved outside the guide post, and its two ends abut against the fixed wedge block and the caliper body respectively. The guide column and the fixed wedge block are coordinated.

9. A safety gear according to any one of claims 1 to 3, characterized in that: The brake member is a brake roller or a brake wedge.

10. An elevator, characterized in that: A safety clamp according to any one of claims 1 to 9 is used.

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