One-way safety clamp

Abstract

The present invention belongs to the technical field of safety clamps, and specifically relates to a one-way safety clamp, comprising a clamp body, the clamp body having a guide rail channel, and also comprising a brake roller and a fixed wedge installed on the clamp body, the brake roller and the fixed wedge are respectively located on both sides of the guide rail channel, the fixed wedge abuts 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 roller; the two ends of the fixed wedge along the direction of the guide rail channel abut against the clamp body and a reset mechanism respectively, and after the safety clamp is reset, the reset mechanism is used to reset the displacement of the fixed wedge along the direction of the guide rail channel. The one-way safety clamp of the present invention adopts a structural design of a brake roller and a leaf spring, has a small structural space and stable braking; the reset mechanism can achieve reset with a small reset force after the one-way safety clamp is braked.

Description

Technical Field

[0001] The invention belongs to the technical field of safety clamps, and in particular relates to a one-way safety clamp. Background Art

[0002] Existing one-way safety clamps, for example, the single wedge-block lifting safety clamp disclosed in the patent document with publication number CN202687686U, has a fixed brake assembly including a fixed brake block and a disc spring group, which requires a larger installation space, resulting in an increase in the size of the safety clamp; in addition, since the fixed brake block cannot move along the extension direction of the elevator guide rail, and there is a large friction coefficient between the fixed brake block and the guide rail, a large reverse force is required to achieve resetting during resetting. At the same time, due to the change of the medium state between the friction block and the guide rail or the guide rail processing state, there are dual parts that require strict control and must be confirmed by tests to reduce the risk. Problems such as reducing the risk of dual parts state changes, reducing installation space, and reducing resetting force need to be solved in an integrated manner. Summary of the invention

[0003] Based on the above-mentioned shortcomings and deficiencies in the prior art, one of the objects of the present invention is to at least solve one or more of the above-mentioned problems in the prior art. In other words, one of the objects of the present invention is to provide a unidirectional safety clamp that meets one or more of the above-mentioned needs.

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

[0005] The one-way safety clamp comprises a clamp body, the clamp body has a guide rail channel, and also comprises a brake roller and a fixed wedge installed on the clamp body, the brake roller 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 roller;

[0006] Two ends of the fixed wedge block along the guide rail channel direction are respectively in contact with the clamp body and the reset mechanism. After the safety clamp is reset, the reset mechanism is used to reset the displacement of the fixed wedge block along the guide rail channel direction.

[0007] As a preferred solution, a sliding seat is provided between the fixed wedge block and the leaf spring, and the fixed wedge block is slidably matched 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.

[0009] As a preferred solution, a wear-reducing member is further provided between the fixed wedge block and the sliding seat.

[0010] As a preferred solution, the wear-reducing component is a roller cage, a ball cage or a wear-reducing block.

[0011] As a preferred solution, an adjustment pad is further provided between the slide seat and the leaf spring.

[0012] As a preferred solution, the caliper body is provided with a cover plate corresponding to the fixed wedge block and the slide seat, the cover plate has a guide limit groove, and the slide seat has a guide pin that cooperates with the guide limit groove to guide and limit the slide seat in a direction perpendicular to the guide rail channel.

[0013] As a preferred solution, the reset mechanism includes a guide post, a compression spring and a spring seat, one end of the guide post is inserted into the fixed wedge block, and the other end passes through the spring seat and the caliper body in sequence; the compression spring is sleeved outside the guide post, and the two ends of the compression spring are respectively abutted against the fixed wedge block and the spring seat;

[0014] The reset mechanism is linked to the fixed wedge block so as to move in a direction perpendicular to the guide rail channel.

[0015] As a preferred solution, the caliper body is provided with a guide plate corresponding to the brake roller, and the guide plate has a guide groove; the brake roller guide is matched with the guide groove to cooperate with the elevator guide rail braking or release the brake.

[0016] As a preferred solution, the caliper body has a raceway that rolls with the brake roller.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The one-way safety clamp of the present invention adopts the structural design of a braking roller and a leaf spring, has a small structural space and stable braking; and the reset mechanism can achieve reset with a small reset force after the safety clamp is braked. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 1 is a schematic structural diagram of a one-way safety clamp according to Embodiment 1 of the present invention;

[0020] Figure 2 It is a schematic structural diagram of a clamp body of a one-way safety clamp according to Embodiment 1 of the present invention;

[0021] Figure 3 1 is a schematic structural diagram of a one-way safety clamp according to Embodiment 1 of the present invention (the guide plate and the cover plate are omitted);

[0022] Figure 4 It is a schematic structural diagram of the one-way safety clamp of embodiment 1 of the present invention from another perspective (the guide plate and the cover plate are omitted). DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the embodiments of the present invention, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other accompanying drawings and other implementation methods can be obtained based on these accompanying drawings without creative work.

[0024] Embodiment 1:

[0025] like Figure 1-4 As shown, the one-way safety clamp of this embodiment includes a clamp body 1, a brake roller 2, a guide plate 3, a fixed wedge block 4, a ball retainer 5, a slide seat 6, an adjustment pad 7, a strip leaf spring 8, and a cover plate 9.

[0026] Specifically, the caliper body 1 has a vertically extending guide rail channel 10, and 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 block 4, the ball retainer 5, the slide seat 6, the adjustment plate 7, and the strip leaf spring 8, so that the brake roller 2 and the fixed wedge block 4 are respectively located on the left and right sides of the guide rail channel 10, so as to cooperate with the elevator guide rail 0 for braking.

[0027] Among them, the front side of the first recess I of the caliper body is open, and the front side opening is provided with a guide plate 3 corresponding to the brake roller 2, and the guide plate 3 has a guide groove 30; the rear side of the brake roller 2 is attached to the inner wall of the caliper body, and the guide is realized through the inner wall of the caliper body, the guide area is large, and the rolling stability of the brake roller 2 is good; the wheel shaft on the front side of the brake roller 2 is inserted into the guide groove 30 to realize the guide match; the brake roller 2 is movably matched with the guide groove 30 to brake with the elevator guide rail 0 or release the brake. In addition, the caliper body has a raceway 11 that rolls with the brake roller 2, and the raceway 11 has convex shoulders on both sides. Accordingly, the brake roller 2 is a structure with a convex middle and concave on both sides. The concave on both sides is in guiding contact with the two convex shoulders of the caliper body and can move upward along the guide track therein to contact the guide rail; the raceway 11 is used to provide support for the brake roller 2 to ensure that the brake roller 2 is in a rolling state, and compared with the sliding state of the brake roller, it has less wear and a longer service life. The convex part of the brake roller 2 may be cylindrical, waist-shaped or segmented, and its surface may be knurled, grooved or otherwise provided with friction-enhancing features to improve self-locking reliability.

[0028] The two ends of the fixed wedge block 4 along the guide rail channel direction, i.e., the upper end and the lower end of the fixed wedge block, respectively abut against the top wall of the second recess II of the caliper body and the reset mechanism installed on the bottom wall of the second recess II of the caliper body. The fixed wedge block 4 abuts against the right side wall of the second recess II of the caliper body through the strip leaf spring 8, and the strip leaf spring 8 is located on the side of the fixed wedge block 4 that is away from the brake roller, i.e., the strip leaf spring 8 is located on the right side of the fixed wedge block 4; wherein, the upper and lower ends of the strip leaf spring 8 abut against the caliper body respectively, and the remaining part of the strip leaf spring 8 is hollowed out at the position of the caliper body corresponding to the caliper body, to ensure that the strip leaf spring 8 has sufficient deformation.

[0029] In addition, a slide seat 6 is arranged between the fixed wedge block 4 and the strip leaf spring 8, and the fixed wedge block 4 is slidably matched with the slide seat 6 to reduce the reset force and reset stability of the safety clamp. The sliding contact surface between the fixed wedge block 4 and the slide seat 6 is an inclined surface.

[0030] In this embodiment, a ball cage 5 is further provided between the fixed wedge block 4 and the slide seat 6 to further reduce the reset force and reset stability of the safety clamp. In addition, an adjustment pad 7 is further provided between the slide seat 6 and the strip leaf spring 8 to adjust the elastic force of the strip leaf spring and the position of the fixed wedge block when the safety clamp is braked.

[0031] The front side opening of the second recess II of the caliper body of the present embodiment is provided with a cover plate 9 corresponding to the fixed wedge block 4, the ball retainer 5, the slide 6, the adjustment pad 7, and the strip leaf spring 8. The cover plate 9 has a first guide limit groove 9a and a second guide limit groove 9b. The slide 6 has a guide pin 60 that cooperates with the first guide limit groove 9a to guide and limit the slide 6 in a direction perpendicular to the guide rail channel (i.e., horizontal direction) (i.e., vertical direction limit); the adjustment pad 7 has a guide protrusion 70 that cooperates with the second guide limit groove 9b to guide and limit the adjustment pad 7 in a direction perpendicular to the guide rail channel (i.e., horizontal direction) (i.e., vertical direction limit).

[0032] The design of the 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 block along the guide rail channel direction after the safety clamp is reset. Specifically, the reset mechanism includes a guide column 12, a compression spring 13 and a spring seat 14. The upper end of the guide column 12 is plugged into the lower end of the fixed wedge block 4 and can move freely in the vertical direction. The lower end of the guide column 12 passes through the spring seat 14 and the bottom wall of the second recess II of the caliper body in sequence; the compression spring 13 is sleeved outside the guide column 12, and the upper and lower ends of the compression spring 13 are respectively abutted against the fixed wedge block 4 and the spring seat 14; wherein, the hole 100 through which the lower end of the guide column 12 passes through the bottom wall of the second recess II of the caliper body is larger than the diameter of the guide column, so that the reset mechanism is linked to the fixed wedge block as a whole to move in a direction perpendicular to the guide rail channel (i.e., the horizontal direction).

[0033] During the braking process of the one-way safety clamp of this embodiment, the brake roller is pulled until it contacts the elevator guide rail, and the clamp body is linked to move to the left, so that the brake roller and the fixed wedge block are both in contact with the elevator guide rail for braking. At this time, the fixed wedge block always rests against the top wall of the second recessed portion of the clamp body; during the resetting process, only a small resetting force is needed to move the fixed wedge block downward, so that the safety clamp is separated from the elevator guide rail, and the moved fixed wedge block returns to its original position under the resetting action of the resetting mechanism.

[0034] Embodiment 2:

[0035] The one-way safety gear of this embodiment is different from that of Embodiment 1 in that:

[0036] The ball cage can also be replaced with a roller cage or a wear-reducing block to reduce the sliding resistance of the fixed wedge block to meet the needs of different applications;

[0037] For other structures, please refer to Example 1.

[0038] Embodiment 3:

[0039] The one-way safety gear of this embodiment is different from that of Embodiment 1 in that:

[0040] One or more of the slide seat and the adjustment pad can be omitted according to actual application requirements; the structure is diversified to meet the needs of different applications;

[0041] For other structures, please refer to Example 1.

[0042] The above description is only a detailed description of the preferred embodiments and principles of the present invention. For ordinary technicians in this field, according to the ideas provided by the present invention, there will be changes in the specific implementation methods, and these changes should also be regarded as the protection scope of the present invention.

Claims

1. A one-way safety clamp, comprising a clamp body (1), the clamp body (1) having a guide rail channel (10), and further comprising a brake roller (2) and a fixed wedge (4) mounted on the clamp body (1), the brake roller (2) and the fixed wedge (4) being respectively located on both sides of the guide rail channel (10), characterized in that: The fixed wedge block (4) is in contact with the caliper body (1) via a leaf spring (8), and the leaf spring (8) is located on a side of the fixed wedge block (4) facing away from the brake roller (2); Two ends of the fixed wedge block (4) along the direction of the guide rail channel (10) are respectively in contact with the clamp body (1) and the reset mechanism. After the safety clamp is reset, the reset mechanism is used to reset the displacement of the fixed wedge block (4) along the direction of the guide rail channel (10).

2. The one-way safety gear according to claim 1, characterized in that: A sliding seat (6) is provided between the fixed wedge block (4) and the leaf spring (8), and the fixed wedge block (4) is slidably matched with the sliding seat (6).

3. The one-way safety gear according to claim 2, characterized in that: The sliding contact surface between the fixed wedge block (4) and the sliding seat (6) is an inclined surface.

4. The one-way safety gear according to claim 2, characterized in that: A wear-reducing component (5) is also provided between the fixed wedge block (4) and the sliding seat (6).

5. The one-way safety gear according to claim 4, characterized in that: The wear-reducing component (5) is a roller cage, a ball cage or a wear-reducing block.

6. The one-way safety clamp according to any one of claims 2 to 5, characterized in that: An adjustment pad (7) is also provided between the slide seat (6) and the leaf spring (8).

7. The one-way safety clamp according to any one of claims 2 to 5, characterized in that: The clamp body (1) is provided with a cover plate (9) corresponding to the fixed wedge block (4) and the slide seat (6); the cover plate (9) has a guide limit groove (9a); the slide seat (6) has a guide pin (60) that cooperates with the guide limit groove to guide and limit the slide seat (6) in a direction perpendicular to the guide rail channel (10).

8. The one-way safety clamp according to any one of claims 1 to 5, characterized in that: The reset mechanism comprises a guide column (12), a compression spring (13) and a spring seat (14); one end of the guide column (12) is inserted into the fixed wedge block (4), and the other end passes through the spring seat (14) and the caliper body (1) in sequence; the compression spring (13) is sleeved outside the guide column (12), and the two ends of the compression spring (13) are respectively in contact with the fixed wedge block (4) and the spring seat (14); The reset mechanism is linked to the fixed wedge block (4) so ​​as to move in a direction perpendicular to the guide rail channel (10).

9. The one-way safety gear according to claim 8, characterized in that: The clamp body (1) is provided with a guide plate (3) corresponding to the brake roller (2), and the guide plate (3) has a guide groove (30); the brake roller (2) is guided and matched with the guide groove (30) to cooperate with the elevator guide rail for braking or release the brake.

10. The one-way safety gear according to claim 9, characterized in that: The caliper body (1) has a raceway (11) that rolls with the brake roller (2).

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