A two-way safety clamp

Abstract

The present invention belongs to the technical field of elevator components, and particularly relates to a two-way safety clamp, which comprises a clamp body. The clamp body has a longitudinally penetrating guide rail channel for the elevator guide rail to penetrate through. The clamp body has mounting recesses respectively located on both sides of the guide rail channel for mounting a friction member and a lifting member respectively. The friction member includes an upward braking friction block and a downward braking friction block which are longitudinally spaced apart along the clamp body. The sides of the upward braking friction block and the downward braking friction block away from the guide rail channel are respectively abutted against the clamp body through elastic pressure members. Among them, an elastic element extending longitudinally along the clamp body is provided between the upward braking friction block and the downward braking friction block. The two-way safety clamp of the present invention uses different friction blocks during upward braking and downward braking respectively, and solves the problem of mutual avoidance between the upward braking friction block and the downward braking friction block by using an elastic element. At the same time, it can also achieve reliable reset with a small force after the friction block avoids.

Description

Technical Field

[0001] The present invention belongs to the technical field of elevator components, and particularly relates to a two-way safety gear. Background Art

[0002] The existing two-way safety gears are implemented in a double-stack manner or use the same friction block for both upward and downward braking. The main problems are that the overall height of the double-stack structure is relatively high, and sharing the same friction block for both upward and downward directions affects the service life and stability of the safety gear or requires a large reset force during braking. At the same time, since the two-way safety gear needs to meet the requirements of safety protection during upward overspeed, as well as car unexpected movement protection and static braking while satisfying downward fall and downward overspeed protection braking, the stable and reliable friction braking and reset, meeting the service life and braking on old guide rails, etc. have become the difficulties of two-way safety. Summary of the Invention

[0003] Based on the above-mentioned disadvantages and deficiencies in the prior art, the purpose of the present invention is to provide a two-way safety gear, which realizes the braking function and reduces the overall space by setting an up-and-down separation design with elastic reset and avoidance, so that the roller-plus-wedge two-way safety gear can achieve the braking function.

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

[0005] A two-way safety gear includes a clamp body. The clamp body has a longitudinally penetrating guide rail channel for an elevator guide rail to pass through. The clamp body has mounting recesses located on both sides of the guide rail channel respectively for mounting a friction member and a lifting member. The friction member includes an upward braking friction block and a downward braking friction block that are longitudinally spaced apart along the clamp body. The sides of the upward braking friction block and the downward braking friction block away from the guide rail channel are respectively abutted against the clamp body through elastic bearing members.

[0006] Wherein, an elastic element extending longitudinally along the clamp body is provided between the upward braking friction block and the downward braking friction block.

[0007] As a preferred solution, the two elastic bearing members are longitudinally spaced apart along the clamp body, and both elastic bearing members are inclined at one end adjacent to each other, and the other end inclines in the direction towards the guide rail channel.

[0008] As a preferred solution, both the upward braking friction block and the downward braking friction block are wedge structures, and the inclined surface angles of the wedge structures match the inclined angles of the elastic bearing members.

[0009] As a preferred solution, the two elastic bearing members are symmetrically distributed longitudinally along the clamp body.

[0010] As a preferred solution, the elastic bearing member is a leaf spring or a disc spring.

[0011] As a preferred solution, the elastic element is a compression spring.

[0012] As a preferred solution, an adjusting spacer is provided between the upward braking friction block or the downward braking friction block and its corresponding elastic bearing member.

[0013] As a preferred solution, the clamp body is provided with a fixed cover plate corresponding to the installation recess where the friction member is provided, and the fixed cover plate has limit grooves corresponding to the upward braking friction block and the downward braking friction block respectively; correspondingly, the upward braking friction block and the downward braking friction block are respectively provided with limit posts, and the limit posts penetrate through their corresponding limit grooves;

[0014] Wherein, the dimension of the limit groove along the transverse direction of the clamp body is larger than the diameter of the limit post.

[0015] As a preferred solution, the lifting member is a roller, and the installation recess where the lifting member is provided is provided with a raceway that cooperates with the roller, and the raceway and the clamp body are of a split structure fixed to each other.

[0016] As a preferred solution, an adjusting gasket for adjusting the compression amount of the elastic bearing member is provided between the end of the raceway and the clamp body.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The two-way safety clamp of the present invention uses different friction blocks during upward braking and downward braking respectively, and uses elastic elements to solve the problem of mutual avoidance between the upward braking friction block and the downward braking friction block. At the same time, it can also achieve reliable reset after the friction block avoids, and it is an integrated safety protection device for elevator falling, overspeed, and unexpected car movement. Description of the Drawings

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

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

[0021] Figure 3 is a schematic internal structural diagram of the two-way safety clamp according to Embodiment 1 of the present invention. Detailed Embodiments

[0022] In order to more clearly illustrate the embodiments of the present invention, the specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, and other embodiments can also be obtained.

[0023] Embodiment 1:

[0024] As Figures 1-3 shown, the two-way safety clamp of this embodiment includes a clamp body 1. The clamp body 1 has a longitudinally penetrating guide rail channel 10 for the elevator guide rail to penetrate through.

[0025] The clamp body 1 has a left mounting recess 1-1 and a right mounting recess 1-2 respectively located on both sides of the guide rail channel, which are used to mount the friction member and the lifting roller 2 respectively.

[0026] The right mounting recess 1-2 of the clamp body of this embodiment is provided with an upper raceway 2-1 and a lower raceway 2-2 that cooperate with the lifting roller 2. The upper raceway 2-1 and the lower raceway 2-2 are symmetrically arranged up and down, and are a split structure fixedly connected to the clamp body 1, which is beneficial to reducing the structural processing difficulty of the raceway and the clamp body. Among them, the upper raceway 2-1 and the lower raceway 2-2 are distributed at intervals to form an initial position. When the lifting roller 2 is in the initial position, the lifting roller 2 has a clearance fit with the elevator guide rail. In addition, the specific structures of the above-mentioned upper raceway and lower raceway can refer to the prior art and will not be elaborated here.

[0027] A guide cover plate 4 is fixedly installed on the front side of the right mounting recess 1-2 of the clamp body of this embodiment. The guide cover plate 4 has a V-shaped lifting groove 40. The lifting arm of the lifting roller 2 extends outside the V-shaped lifting groove to realize the two-way lifting guidance of upward braking and downward braking.

[0028] The friction member installed in the left mounting recess 1-1 of the clamp body of this embodiment includes an upper braking friction block 3-1 and a lower braking friction block 3-2 that are longitudinally spaced apart along the clamp body. The sides of the upper braking friction block 3-1 and the lower braking friction block 3-2 that are far away from the guide rail channel, that is, the left side, are respectively abutted against the clamp body 1 through an upper leaf spring 5-1 and a lower leaf spring 5-2. Among them, the upper leaf spring 5-1 and the lower leaf spring 5-2 are longitudinally spaced apart along the clamp body to avoid mutual influence; and both the upper leaf spring 5-1 and the lower leaf spring 5-2 are inclined with an adjacent end as a base point and the other end in the direction close to the guide rail channel, that is, the upper end of the upper leaf spring 5-1 is inclined in the direction close to the guide rail channel, and the lower end of the lower leaf spring 5-2 is inclined in the direction close to the guide rail channel; the upper leaf spring 5-1 and the lower leaf spring 5-2 are symmetrically distributed.

[0029] An elastic element 6 extending longitudinally along the clamp body is provided between the upper braking friction block and the lower braking friction block of this embodiment. The elastic element 6 of this embodiment is a compression spring, and its function is to ensure that the upper braking friction block and the lower braking friction block are relatively fixed without external force, and during the braking process, due to the external force, the upper braking friction block and the lower braking friction block can avoid each other and reset after the avoidance. Specifically, the bottom of the upper braking friction block has a mounting groove, and the top of the lower braking friction block has a mounting groove. Both ends of the compression spring are embedded in the mounting grooves of the upper braking friction block and the lower braking friction block.

[0030] Among them, both the upper brake friction block and the lower brake friction block are wedge structures, and the inclined surface angles of the wedge structures match the inclined angles of the corresponding leaf springs to ensure stable braking force.

[0031] In addition, adjustment pads 7 are provided between the upper brake friction block and the lower brake friction block of this embodiment and their corresponding leaf springs respectively, for adjusting the braking force and reducing friction; in actual application, the structure of the adjustment pads can be determined according to the actual application working conditions.

[0032] A fixed cover plate 8 is installed on the front side of the left installation recess 1-1 of the pliers body of this embodiment. The fixed cover plate 8 has an upper limit groove 8-1 and a lower limit groove 8-2 corresponding to the upper brake friction block 3-1 and the lower brake friction block 3-2 respectively; correspondingly, the upper brake friction block 3-1 and the lower brake friction block 3-2 are respectively provided with limit posts 30, and the limit posts 30 penetrate through their corresponding limit grooves to realize the movable limit of the upper brake friction block and the lower brake friction block. Among them, the dimension of the limit groove along the transverse direction of the pliers body is larger than the diameter of the limit post, providing a margin for the transverse movement of the upper brake friction block and the lower brake friction block.

[0033] The working principle of the two-way safety pliers of this embodiment is as follows:

[0034] When braking downward, the lifting roller is lifted upward and contacts the elevator guide rail. Through the action of friction, the lifting roller continues to run. At this time, the left upper brake friction block compresses the upper leaf spring to generate a positive pressure. When the lifting roller moves to the upper limit, the upper leaf spring is compressed to the maximum deformation to provide a positive pressure and brake the car within a certain deceleration range.

[0035] When braking upward, the lifting roller is lifted downward and contacts the elevator guide rail. Through the action of friction, the lifting roller continues to run. At this time, the left lower brake friction block compresses the lower leaf spring to generate a positive pressure. When the lifting roller moves to the lower limit, the lower leaf spring is compressed to the maximum deformation to provide a positive pressure and brake the car within a certain deceleration range.

[0036] Embodiment 2:

[0037] The difference between the two-way safety pliers of this embodiment and those of Embodiment 1 lies in:

[0038] Adjustment gaskets for adjusting the compression amount of the leaf spring are respectively provided between the top of the upper raceway and the bottom of the lower raceway and the pliers body, or adjustment gaskets for adjusting the compression amount of the leaf spring are provided between the contact surfaces of the upper raceway and the lower raceway and the pliers body, to meet the requirements of different applications;

[0039] Other structures can refer to Embodiment 1.

[0040] Embodiment 3:

[0041] The difference between the two-way safety pliers of this embodiment and those of Embodiment 1 lies in:

[0042] The lifting part adopts an upper wedge block and a lower wedge block to meet the requirements of different applications;

[0043] For the specific structure, reference can be made to Embodiment 1.

[0044] Embodiment 4:

[0045] The difference between the bi-directional safety clamp of this embodiment and that of Embodiment 1 lies in:

[0046] The upper and lower raceways are directly formed and machined on the clamp body to meet the requirements of different applications;

[0047] For other structures, reference can be made to Embodiment 1.

[0048] Embodiment 5:

[0049] The difference between the bi-directional safety clamp of this embodiment and that of Embodiment 1 lies in:

[0050] Both the upper leaf spring and the lower leaf spring extend vertically without inclination; to meet the requirements of different applications;

[0051] For other structures, reference can be made to Embodiment 1.

[0052] Embodiment 6:

[0053] The difference between the bi-directional safety clamp of this embodiment and that of Embodiment 1 lies in:

[0054] The upper leaf spring and the lower leaf spring can be replaced with a disc spring structure to meet the requirements of different applications;

[0055] For other structures, reference can be made to Embodiment 1.

[0056] Embodiment 7:

[0057] The difference between the bi-directional safety clamp of this embodiment and that of Embodiment 1 lies in:

[0058] Tension springs or other elastic members that can keep the ends of the braking friction blocks in contact with the clamp body can also be provided on the upward braking friction blocks and the downward braking friction blocks to meet the requirements of different applications;

[0059] For other structures, reference can be made to Embodiment 1.

[0060] Embodiment 8:

[0061] The difference between the bi-directional safety clamp of this embodiment and that of Embodiment 1 lies in:

[0062] The upper leaf spring and the lower leaf spring can also be asymmetrically distributed, and the inclination angles of each can be adjusted according to actual requirements;

[0063] For other structures, reference can be made to Embodiment 1.

[0064] The above description only elaborates in detail on the preferred embodiments and principles of the present invention. For those of ordinary skill in the art, according to the idea provided by the present invention, there will be changes in the specific implementation manners, and these changes should also be regarded as the protection scope of the present invention.

Claims

1. A two-way safety clamp, comprising a clamp body. The clamp body has a longitudinally penetrating guide rail channel for an elevator guide rail to penetrate through. The clamp body has mounting recesses respectively located on both sides of the guide rail channel for mounting a friction member and a lifting member respectively, and is characterized in that The friction members include an upward braking friction block and a downward braking friction block that are longitudinally spaced apart along the pliers body. The sides of the upward braking friction block and the downward braking friction block away from the guide rail channel are respectively abutted against the pliers body through elastic bearing members; Wherein, an elastic element extending longitudinally along the pliers body is provided between the upward braking friction block and the downward braking friction block; The two elastic bearing members are longitudinally spaced apart along the pliers body, and both of the two elastic bearing members are inclined at one end adjacent to the other end in the direction towards the guide rail channel.

2. The two-way safety clamp according to claim 1, characterized in that, Both the upward braking friction block and the downward braking friction block are wedge-shaped structures, and the inclined surface angles of the wedge-shaped structures match the inclined angles of the elastic bearing members.

3. A two-way safety clamp according to claim 1, characterized in that, The two elastic bearing members are symmetrically distributed longitudinally along the pliers body.

4. A two-way safety clamp according to any one of claims 1-3, characterized in that, The elastic bearing member is a leaf spring or a disc spring.

5. A two-way safety clamp according to any one of claims 1-3, characterized in that, The elastic element is a compression spring.

6. A two-way safety clamp according to any one of claims 1-3, characterized in that, An adjustment spacer is provided between the upward braking friction block or the downward braking friction block and its corresponding elastic bearing member.

7. A bi-directional safety gear according to any one of claims 1-3, characterized in that, The pliers body is provided with a fixed cover plate corresponding to the installation recess for the friction member. The fixed cover plate has limit grooves corresponding to the upward braking friction block and the downward braking friction block respectively; correspondingly, the upward braking friction block and the downward braking friction block are respectively provided with limit posts, and the limit posts penetrate through their corresponding limit grooves; Wherein, the dimension of the limit groove along the transverse direction of the pliers body is larger than the diameter of the limit post.

8. A two-way safety clamp according to any one of claims 1-3, characterized in that, The lifting member is a roller, and the installation recess provided with the lifting member is provided with a raceway that cooperates with the roller, and the raceway and the pliers body are a fixed split structure.

9. A two-way safety clamp according to claim 8, characterized in that, An adjustment gasket for adjusting the compression amount of the elastic bearing member is provided between the end of the raceway and the pliers body.

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