One-way safety tongs

Abstract

The utility model relates to a one -way safety tongs, wherein one -way safety tongs includes the body, the body is installed on the elevator car, the body has the first installation department and the second installation department who set up oppositely, the second installation department forms the movable slot to the side of the clearance, and the movable slot is gradually narrowed from the first end to the second end direction, first brake mechanism, first brake mechanism includes spring and brake block, spring is installed in the first installation department the side to the clearance, and brake block is installed in the end of spring, and brake block is used for with guide rail contact, second brake mechanism, second brake mechanism sets up in movable slot, and at least partial second brake mechanism is set up with movable slot of second installation department, and second brake mechanism is used for rolling or sliding in movable slot. The second end of movable slot is equipped with the limiting block for limiting. The utility model can set up limiting block in movable slot of second installation department to realize the limiting effect when second brake mechanism brake, improve its life.

Description

Technical Field

[0001] This utility model relates to an elevator safety device, and more particularly to a one-way safety clamp. Background Technology

[0002] The description in this section provides only background information related to the disclosure of this utility model and does not constitute prior art.

[0003] In existing elevators, in order to avoid accidents and to deal with extreme malfunctions such as elevator stalling and wire rope breakage, and to prevent people in the car from being hit unexpectedly, corresponding safety clamps are usually installed.

[0004] In existing technologies, safety clamps are typically installed in pairs on the guide structures of the car and counterweight. Automatic triggering is achieved through the control action of a speed governor. A common approach involves using a speed governor or similar structure to determine the car's stall condition. In the event of an unexpected stall, the signal is transmitted to the safety clamp, causing its arms to grip the rails and bring the elevator car to a stop with a very short braking distance. However, this method is complex, costly, and difficult to maintain. Rolling safety clamps use rolling rollers to grip the guide rails, but they are prone to wear and their structure is still not durable.

[0005] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content

[0006] The purpose of this invention is to provide a one-way safety clamp that can limit the braking of the second braking mechanism by setting a limiting block in the movable groove of the second mounting part, thereby improving its service life.

[0007] To achieve the above objectives, this utility model discloses a one-way safety clamp, the one-way safety clamp comprising:

[0008] The body is mounted on an elevator car. The body has a first mounting part and a second mounting part that are disposed opposite to each other. There is a gap between the first mounting part and the second mounting part for accommodating elevator guide rails. The second mounting part forms a movable groove on one side facing the gap. The movable groove has a first end and a second end that are disposed opposite to each other. The movable groove gradually narrows from the first end to the second end.

[0009] A first braking mechanism, comprising a spring and a brake block, wherein the spring is mounted on the side of the first mounting portion facing the gap, and the brake block is mounted on the end of the spring and is used to contact the guide rail;

[0010] The second braking mechanism is disposed in the movable groove, and at least a portion of the second braking mechanism is disposed in the movable groove of the second mounting part. The second braking mechanism is used to roll or slide in the movable groove.

[0011] Wherein, a limiting block is installed at the second end of the movable groove facing the first end. When the second braking mechanism is set at the first end of the movable groove, there is the farthest distance between the second braking mechanism and the guide rail. When the second braking mechanism is set at the second end of the movable groove, the second braking mechanism simultaneously contacts the guide rail and the limiting block, and causes the braking block to contact the guide rail.

[0012] As a further description of the above technical solution, the cross-section of the limiting block is set to a spherical shape so that the limiting block and the second braking mechanism make point contact.

[0013] As a further description of the above technical solution, the limiting block is made of copper.

[0014] As a further description of the above technical solution, the limiting block is detachably snapped into the movable groove.

[0015] As a further description of the above technical solution, a wear-resistant component is also provided between the first end and the second end of the movable groove. The wear-resistant component is used to contact the second braking mechanism when the second braking mechanism is provided at the second end of the movable groove.

[0016] As a further description of the above technical solution, the cross-section of the second braking mechanism is set to be circular, and the outer surface of the second braking mechanism is provided with embossing.

[0017] As a further description of the above technical solution, the first mounting part has a groove on the side facing the gap for accommodating the first braking mechanism.

[0018] As a further description of the above technical solution, the second mounting part has a cover plate in the direction of movement parallel to the first braking mechanism, the cover plate being used to limit the second braking mechanism from disengaging from the moving slot.

[0019] Based on the above technical solution, the beneficial effects of this utility model are as follows:

[0020] The one-way safety clamp of this utility model can limit the braking of the second braking mechanism by setting a limiting block in the movable groove of the second mounting part, thereby improving its service life. Specifically, in an emergency situation where the elevator car stalls, the second braking mechanism can roll towards the second end of the movable groove due to inertia. Since the movable groove narrows from the first end to the second end, the rolling second braking mechanism moves towards the guide rail until it contacts the guide rail, and also presses the brake block of the first braking mechanism against the other side of the guide rail. The limiting block at the second end of the movable groove provides end-to-end contact with the second braking mechanism, avoiding excessive friction and damage to the second limiting mechanism, and improving its expected service life.

[0021] To further understand the features and technical content of this utility model, please refer to the following detailed description and drawings of this utility model. However, the drawings provided are for reference and illustration only and are not intended to limit this utility model. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the initial state of a one-way safety clamp provided in the embodiments of this specification;

[0024] Figure 2 This is a schematic cross-sectional view of the initial state of a one-way safety clamp provided in the embodiments of this specification;

[0025] Figure 3 This is a schematic diagram of the braking state of a one-way safety clamp provided in the embodiments of this specification;

[0026] Figure 4 This is a schematic cross-sectional view of the braking state of a one-way safety clamp provided in the embodiments of this specification;

[0027] In the picture:

[0028] 100. Guide rail;

[0029] 1. Main body; 11. First mounting part; 111. Groove; 12. Second mounting part; 121. Movable groove;

[0030] 2. First braking mechanism; 21. Spring; 22. Brake block;

[0031] 3. Second braking mechanism;

[0032] 4. Limit block;

[0033] 5. Wear-resistant parts;

[0034] 6. Cover plate. Detailed Implementation

[0035] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.

[0036] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. This utility model can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this utility model. Furthermore, the accompanying drawings of this utility model are for simple illustration only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this utility model in detail, but the disclosed content is not intended to limit the scope of protection of this utility model.

[0037] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used herein should, as appropriate, include any combination of one or more of the related listed items.

[0038] Please see Figure 1-4 This embodiment provides a one-way safety clamp, which includes:

[0039] The main body 1 is mounted on the elevator car. The main body 1 has a first mounting part 11 and a second mounting part 12 arranged opposite to each other. There is a gap between the first mounting part 11 and the second mounting part 12 for accommodating the elevator guide rail 100. The second mounting part 12 forms a movable groove 121 on one side facing the gap. The movable groove 121 has a first end and a second end arranged opposite to each other. The movable groove gradually narrows from the first end to the second end.

[0040] The first braking mechanism 2 includes a spring 21 and a brake block 22. The spring 21 is installed on the side of the first mounting portion facing the gap 11, and the brake block 22 is installed on the end of the spring 21. The brake block 22 is used to contact the guide rail 100.

[0041] The second braking mechanism 3 is disposed in the movable groove 121. At least a portion of the second braking mechanism 3 is disposed in contact with the movable groove 121 of the second mounting part 12. The second braking mechanism 3 is used to roll or slide in the movable groove 121.

[0042] The second end of the movable groove 121 is equipped with a limiting block 4 facing the first end. When the second braking mechanism 3 is set at the first end of the movable groove 121, the second braking mechanism 3 and the guide rail 100 have the farthest distance. When the second braking mechanism 3 is set at the second end of the movable groove 121, the second braking mechanism 3 is in contact with the guide rail 100 and the limiting block 4 at the same time, and the braking block 22 is in contact with the guide rail 100.

[0043] Based on the above structure of this embodiment, during elevator use, if the elevator car unexpectedly stalls, the speed of the car-driven body 1 changes drastically. Under inertia, the second braking mechanism 3 moves from the first end of the movable groove 121 to the second end of the movable groove 121. Since the second braking mechanism 3 is connected to a movable swing arm that is also connected to the elevator car, the swing arm moves the second braking mechanism 3 towards... Figure 1 The second braking mechanism 3 is pressed against the side of the movable groove 121 wall, ensuring that it remains in contact with the right side surface of the movable groove 121. Therefore, the second braking mechanism 3 can roll or rub against the wall of the movable groove 121 until it moves to the second end of the movable groove 121. Figure 3 As shown, the top of the second braking mechanism 3 abuts against the limiting block 4 at the second end of the movable groove 121. The left side of the second braking mechanism 3 rubs or abuts against the guide rail 100, causing the guide rail 100 to provide a reaction force to the second braking mechanism 3. In this embodiment, the first mounting part 11 and the second mounting part 12 are two parts of an integral body 1 structure. Therefore, under the reaction force, the body 1 moves to the right as a whole, causing the brake block 22 on one side of the first mounting part 11 to abut or rub against the guide rail 100. The spring 21 is compressed and continuously provides a corresponding variable support force to the brake block 22. At this time, the guide rail 100 obtains a large friction force under the joint clamping and squeezing of the brake block 22 and the second braking mechanism 3, causing the one-way safety clamp to quickly decelerate and stop moving relative to the guide rail 100, and causing the entire elevator car to come to a standstill.

[0044] In the above embodiment, a limiting block 4 can be provided in the movable groove of the second mounting part 12 to limit the braking of the second braking mechanism 3 during braking, thereby improving its service life. Specifically, in an emergency, when the elevator car loses speed, the second braking mechanism 3 can roll towards the second end of the movable groove 121 due to inertia. Since the movable groove 121 narrows from the first end to the second end, the rolling second braking mechanism 3 moves towards the guide rail 100 until it contacts the guide rail 100, and also presses the brake block 22 of the first braking mechanism 2 against the other side of the guide rail 100. The limiting block 4 at the second end of the movable groove 121 provides end contact with the second braking mechanism 3, avoiding excessive friction and damage to the second limiting mechanism 3, and improving its expected service life.

[0045] The swing arm used to control the second braking mechanism 3 can be a conventional roller rocker arm or a safety clamp rocker arm. Its function is to transmit the action of other braking mechanisms to the rollers of the second braking mechanism 3 through pivot rotation when overspeeding or rope derailment is triggered, so that the rollers of the second braking mechanism 3 clamp the guide rail, which is the conventional setting of roller-type safety clamps.

[0046] Specifically, such as Figure 3 , 4 As shown, in the braking state, the second braking mechanism 3 is limited by the top position limiting block 4, so its top position and part of its side position do not directly contact the wall of the movable groove 121 of the second mounting part 12. In the final state, a certain isolation gap is formed between the second braking mechanism 3 and the movable groove 121, which avoids excessive friction between the top and side (mainly the right side in the figure) of the second braking mechanism 3 and the movable groove 121.

[0047] In another embodiment, the cross-section of the limiting block 4 is set to be spherical so that the limiting block 4 and the second braking mechanism 3 make point contact. Therefore, in the case of point contact, the second braking mechanism 3 can minimize the friction surface, minimize the intense contact with structures other than the non-guide rail 100 that occur during braking, and further improve the service life.

[0048] The limiting block 4 can be made of copper, which has been tested and proven to have good impact resistance and is not easily broken, providing effective support for the first braking mechanism 2. At the same time, the limiting block 4 is detachably installed in the movable groove 121, so during maintenance, only the limiting block 4 in the movable groove 121 needs to be removed and replaced, which is convenient for maintenance.

[0049] Furthermore, a wear-resistant component 5 is provided between the first and second ends of the movable groove 121. The wear-resistant component 5 is used to contact the second braking mechanism 3 when the second braking mechanism 3 is located at the second end of the movable groove 121. Before the limiting block 4 abuts against the second braking mechanism 3, during the movement of the second braking mechanism 3, the wear-resistant component 5, located near the end of the movable groove 121 between the first and second ends and close to the end of the second end, can rub against the second braking mechanism 3 more intensely and clamp the second braking mechanism 3, so that the second braking mechanism 3 is finally clamped and fixed at the second end of the movable groove 121.

[0050] Similarly, the wear-resistant part 5 can also be detachably installed in the movable slot 121. Therefore, during maintenance, only the wear-resistant part 5 in the movable slot 121 needs to be removed and replaced, which is also convenient for maintenance.

[0051] The cross-section of the second braking mechanism 3 is set to be circular, and the outer surface of the second braking mechanism 3 is provided with embossing. Therefore, in this embodiment, the second braking mechanism 3 actually rolls relative to the movable groove 121 and on the outer wall of the movable groove 121. The embossing improves the friction and achieves the stability of rolling, avoids slippage, and minimizes the frictional consumption of the second braking mechanism 3 and other mechanisms.

[0052] like Figure 1 As shown, the first mounting part 11 has a groove 111 on the side facing the gap for accommodating the first braking mechanism 2. The groove 111 allows the first braking mechanism 2 to be hidden inside the first mounting part 11 after being squeezed, which helps to reduce the size of the body 1 structure.

[0053] Furthermore, the second mounting part 12 has a cover plate 6 in a direction of movement parallel to the first braking mechanism 2. The cover plate 6 is used to limit the second braking mechanism 3 from disengaging from the movable groove 121. Specifically, the cover plate is parallel to... Figure 1 or Figure 3 The paper is attached to one side of the second mounting part 12 in the direction of the paper surface to prevent the second braking mechanism 3 from shaking or falling off in the direction perpendicular to the screen, and also to prevent dust.

[0054] The above-disclosed content is only a preferred and feasible embodiment of the present utility model, and is not intended to limit the scope of the patent application of the present utility model. Therefore, all equivalent technical changes made using the contents of the present utility model specification and drawings are included in the scope of the patent application of the present utility model.

[0055] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0056] Although this application has been described by way of examples, those skilled in the art will know that this application has many modifications and variations without departing from the spirit of this application, and it is intended that the appended embodiments include these modifications and variations without departing from this application.

Claims

1. A one-way safety clamp, characterized in that, The unidirectional safety clamp includes: The body is mounted on an elevator car. The body has a first mounting part and a second mounting part that are disposed opposite to each other. There is a gap between the first mounting part and the second mounting part for accommodating elevator guide rails. The second mounting part forms a movable groove on one side facing the gap. The movable groove has a first end and a second end that are disposed opposite to each other. The movable groove gradually narrows from the first end to the second end. A first braking mechanism, comprising a spring and a brake block, wherein the spring is mounted on the side of the first mounting portion facing the gap, and the brake block is mounted on the end of the spring and is used to contact the guide rail; The second braking mechanism is disposed in the movable groove, and at least a portion of the second braking mechanism is disposed in the movable groove of the second mounting part. The second braking mechanism is used to roll or slide in the movable groove. Wherein, a limiting block is installed at the second end of the movable groove facing the first end. When the second braking mechanism is set at the first end of the movable groove, there is the farthest distance between the second braking mechanism and the guide rail. When the second braking mechanism is set at the second end of the movable groove, the second braking mechanism simultaneously contacts the guide rail and the limiting block, and causes the braking block to contact the guide rail.

2. The one-way safety clamp according to claim 1, characterized in that: The cross-section of the limiting block is set to a spherical shape so that the limiting block and the second braking mechanism make point contact.

3. The one-way safety clamp according to claim 1, characterized in that: The limiting block is made of copper.

4. The one-way safety clamp according to claim 1, characterized in that: The limiting block can be detachably snapped into the movable slot.

5. The one-way safety clamp according to claim 1, characterized in that: A wear-resistant component is also provided between the first end and the second end of the movable groove. The wear-resistant component is used to contact the second braking mechanism when the second braking mechanism is located at the second end of the movable groove.

6. The one-way safety clamp according to claim 1, characterized in that: The cross-section of the second braking mechanism is circular, and the outer surface of the second braking mechanism is embossed.

7. The one-way safety clamp according to claim 1, characterized in that: The first mounting portion has a groove on the side facing the gap for accommodating the first braking mechanism.

8. The one-way safety clamp according to claim 1, characterized in that: The second mounting portion has a cover plate in a direction of movement parallel to the first braking mechanism, the cover plate being used to limit the second braking mechanism from disengaging from the movable slot.

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