Self-locking mechanism

Abstract

The utility model discloses a self-locking mechanism which comprises a movable self-locking piece and a fixed self-locking piece, the movable self-locking piece comprises a self-locking pin and a guide wheel rotationally arranged on the self-locking pin, the fixed self-locking piece comprises a fixed sleeve and a guide ring arranged in the fixed sleeve, the self-locking pin moves towards the interior of the fixed sleeve, and the guide ring is arranged in the fixed sleeve. When the guide ring makes primary contact with the guide wheel, the guide wheel deflects and is clamped and embedded into the fixing sleeve when the self-locking pin is disengaged, and when the guide ring makes secondary contact with the guide wheel, the guide wheel deflects and is disengaged from the fixing sleeve. The self-locking effect is achieved in the mode that the guide block and the guide teeth are matched with the clamping block, a mechanical locking mode is used for replacing an electric control mode for locking, limitation of use scenes is relieved, and meanwhile influences caused by environmental factors are avoided.

Description

Technical Field

[0001] The utility model relates to the field of self-locking mechanisms, and in particular to a self-locking mechanism. Background Art

[0002] Traditional fences are single-layer fences, and their heights cannot be adjusted according to actual situations. On this basis, they are improved into double-layer fences, and electric telescopic rods are provided to achieve height adjustment.

[0003] However, there are many limiting factors for fences that adjust height electronically. Under the demand of power supply, they are mostly used in indoor venues or the edges outside the indoor area, and it can also avoid damage to electronic control accessories caused by outdoor environmental factors. Therefore, a mechanical self-locking device is needed to replace the electronic control method to be applicable to multiple scenarios. Summary of the Invention

[0004] Based on this, the present application provides a self-locking mechanism to solve the above technical problems.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a self-locking mechanism, including a movable self-locking part and a fixed self-locking part. The movable self-locking part includes a self-locking pin and a guide wheel rotatably arranged on the self-locking pin. The fixed self-locking part includes a fixed sleeve and a guide ring arranged in the fixed sleeve. When the self-locking pin moves into the fixed sleeve, when the guide wheel contacts the guide ring for the first time, the guide wheel deflects and is stuck in the fixed sleeve when the self-locking pin comes out. When contacting for the second time, the guide wheel deflects and comes out of the fixed sleeve.

[0006] In the above technical solution, further, a plurality of groups of guide blocks are evenly arranged on the annular wall of the guide wheel. The guide blocks are triangular, and the guiding tips are in the same circumferential direction as the guide wheel.

[0007] In the above technical solution, further, the self-locking pin is installed on a fixed block. An annular groove is arranged on the self-locking pin and below the guide wheel, and a retaining ring is arranged in the annular groove.

[0008] In the above technical solution, further, a spring is arranged between the outer circle of the self-locking pin and between the fixed block and the guide wheel.

[0009] In the above technical solution, further, a plurality of groups of clamping blocks are arranged at the upper end of the inner wall of the fixed sleeve. The upper part of the clamping block is provided with a guiding edge, and the lower part is provided with a clamping tooth. The number of clamping blocks is the same as the number of guide blocks.

[0010] In the above technical solution, further, guiding teeth are arranged along the guiding ring, the number of the guiding teeth is twice the number of the guiding blocks and the clamping blocks, and the guiding teeth and the clamping teeth are arranged staggeredly.

[0011] In the above technical solution, further, a wall groove is arranged at the lower end of the inner wall of the fixed sleeve, a positioning rib is arranged in the wall groove, a wall convex matching with the wall groove is arranged on the guiding ring, and a positioning groove matching with the positioning rib is arranged on the wall convex.

[0012] The beneficial effects of the present utility model are as follows: the cooperation mode between the guiding block and the guiding teeth is utilized and combined with the clamping block to achieve the self-locking effect, the mechanical locking mode is used to replace the electric control locking mode, the limitation of the use scenario is removed, and meanwhile, the influence caused by environmental factors is avoided. Description of the Drawings

[0013] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0014] Figure 1 is a perspective view of the present utility model.

[0015] Figure 2 is an exploded view of the present utility model.

[0016] Figure 3 is a schematic structural view of the retaining ring of the present utility model.

[0017] Figure 4 is a perspective view of the fixed sleeve of the present utility model.

[0018] Figure 5 is a front view of the self-locking pin of the present utility model.

[0019] In the figure, 1. movable self-locking member, 11. self-locking pin, 111. annular groove, 12. guide wheel, 121. guide block, 13. fixed block, 14. retaining ring, 15. spring, 2. fixed self-locking member, 21. fixed sleeve, 211. clamping block, 2111. guiding edge, 2112. clamping tooth, 212. wall groove, 2121. positioning rib, 22. guiding ring, 221. guiding tooth, 222. wall convex, 2221. positioning groove. Detailed Embodiment

[0020] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of the technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope of the present application.

[0021] Referring to Figures 1-5 As shown, a self-locking mechanism includes a movable self-locking member 1 and a fixed self-locking member 2. The movable self-locking member 1 includes a self-locking pin 11 and a guide wheel 12 rotatably disposed on the self-locking pin 11. The fixed self-locking member 2 includes a fixed sleeve 21 and a guide ring 22 disposed within the fixed sleeve 21. When the self-locking pin 11 moves into the fixed sleeve 21 and makes a first contact with the guide ring 22 through the guide wheel 12, the guide wheel 12 deflects and is caught in the fixed sleeve 21 when the self-locking pin 11 is withdrawn. When making a second contact, the guide wheel 12 deflects and disengages from the fixed sleeve 21.

[0022] Among them, in order to form a locking effect for the fence, a fixed fence fixed on the ground and a movable fence slidably disposed on the fixed fence need to be provided. The fixed self-locking member 2 is installed on the fixed fence, and the movable self-locking member 1 is installed on the movable fence.

[0023] Specifically, the self-locking pin 11 is installed on a fixed block 13. The fixed block 13 is used to install the movable self-locking member 1 on the movable fence. The fixed self-locking member 2 is directly fixed on the fixed fence. The movable self-locking member 1 and the fixed self-locking member 2 are located on the same vertical axis.

[0024] A number of groups of guide blocks 121 are uniformly arranged on the circumferential outer wall of the guide wheel 12. Specifically, the number of the guide blocks 121 is four groups. The guide blocks 121 are in the shape of isosceles triangles and the guide tips are facing the circumferential direction of the guide wheel 12. The guide tips of each group of guide blocks 121 face the same direction.

[0025] To prevent the guide wheel 12 from falling off, a blocking member for supporting the guide wheel 12 needs to be provided below the guide wheel 12. An annular groove 111 is provided on the self-locking pin 11 and below the guide wheel 12. A detachable retaining ring 14 is provided in the annular groove 111. An inner ring hole matching the diameter of the annular groove 111 is provided at the center of the retaining ring 14. An opening for plastically deforming and clamping it onto the self-locking pin 11 is provided on the retaining ring 14. At the same time, two groups of notches communicating with the inner ring hole are also provided on the retaining ring 14.

[0026] To prevent the guide wheel 12 installed on the self-locking pin 11 from rotating randomly, a spring 15 is provided between the lower wall of the fixed block 13 and the upper wall of the guide wheel 12, and the self-locking pin 11 is located inside the spring 15. In the initial state, the spring 15 has a certain tightening force, causing the guide wheel 12 to fit towards the retaining ring 14. When a guiding force is applied, the guide wheel 12 can rotate but still remains tightened.

[0027] A number of groups of clamping blocks 211 are provided on the inner wall of the fixed sleeve 21 and at the upper edge. A guiding edge 2111 is provided on the upper part of the clamping block 211. The guiding edge 2111 is in a pointed shape. A clamping tooth 2112 is provided on the lower part. The guiding tooth 221 is in a shape similar to a right-angled triangle. The number of the clamping blocks 211 is the same as the number of the guiding blocks 121, preferably four groups.

[0028] A vacant channel is provided between adjacent guiding blocks 121 and clamping blocks 211.

[0029] Guiding teeth 221 in the same orientation are provided along the guiding ring 22. The shape of the guiding teeth 221 is longitudinally symmetrical with the shape of the clamping teeth 2112. The number of the guiding teeth 221 is twice the number of the clamping blocks 211 and the guiding blocks 121, preferably four groups. To ensure the guiding effect, the guiding teeth 221 and the clamping teeth 2112 are arranged staggeredly, and the staggering distance is half the tooth pitch of the guiding teeth 221 or the clamping teeth 2112.

[0030] In order to ensure the stability of the staggered spacing, a limiting structure for limiting the relative positions of the two is arranged between the fixed sleeve 21 and the guide ring 22. Specifically, an annular wall groove 212 is arranged at the lower end of the inner wall of the fixed sleeve 21, and a positioning convex strip 2121 flush with the upper wall surface is arranged at the wall groove 212. In addition, a wall protrusion 222 with a thickness matching the wall groove 212 is arranged below the guide ring 22, and a positioning groove 2221 matching the positioning convex strip 2121 is arranged on the wall protrusion 222. It should be noted that the guide ring 22 and the fixed sleeve 21 are transitionally matched to prevent the guide ring 22 from easily escaping from the fixed sleeve 21.

[0031] The working process of the utility model is as follows: in the initial state, the fixed self-locking part 2 and the movable self-locking part 1 are disengaged, the fixed self-locking part 2 is controlled to move forward in the direction of the movable self-locking part 1, and the guide wheel 12 enters the fixed sleeve 21. After the guide block 121 on the guide wheel 12 contacts the guide edge 2111 on the upper part of the card block 211, the guide edge 2111 guides the guide wheel 12 to rotate and enter the channel between the two adjacent groups of the card blocks 211. After sliding down along this channel, the lower end corner of the triangular side of the guide block 121 contacts the guide tooth 221, so that the guide wheel 12 rotates again and moves along the guide tooth 22 1 abuts against the bottom of the tooth. As the movable self-locking member 1 recovers, the upper end of the triangular side of the guide block 121 contacts the oblique side of the latch tooth 2112 at the lower part of the latch block 211, and the guide wheel 12 is rotated again through the oblique side of the latch tooth 2112 and abuts against the latch tooth 2112 along the latch tooth 2112, thereby forming a locked state. Subsequently, when the movable self-locking member 1 moves downward for the second time, the lower end of the triangular side of the guide block 121 contacts the guide tooth 221 again, and the guide wheel 12 deflects half the tooth spacing again. When the movable self-locking pin 11 recovers for the second time, the guide block 121 moves along the channel between the latch blocks 211, and the guide wheel 12 is separated from the fixed sleeve 21.

[0032] So far, various embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed herein.

[0033] Finally, it should be noted that the above is only a preferred embodiment of the present application. The foregoing embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. A self-locking mechanism, comprising a movable self-locking part and a fixed self-locking part, characterized in that: The movable self-locking part includes a self-locking pin and a guide wheel rotatably arranged on the self-locking pin, and the fixed self-locking part includes a fixed sleeve and a guide ring arranged in the fixed sleeve. When the self-locking pin moves into the fixed sleeve and contacts the guide wheel once through the guide ring, the guide wheel deflects and is embedded in the fixed sleeve when the self-locking pin comes out. When the self-locking pin comes into contact for the second time, the guide wheel deflects and comes out of the fixed sleeve.

2. A self-locking mechanism according to claim 1, characterized in that: A plurality of groups of guide blocks are evenly arranged on the annular wall of the guide wheel. The guide blocks are triangular in shape and the guide tips are consistent with the circumferential direction of the guide wheel.

3. A self-locking mechanism according to claim 2, characterized in that: The self-locking pin is installed on the fixed block. An annular groove is arranged on the self-locking pin and at the lower end of the guide wheel. A retaining ring is arranged in the annular groove.

4. A self-locking mechanism according to claim 3, characterized in that: A spring is arranged on the outer ring of the self-locking pin and between the fixing block and the guide wheel.

5. A self-locking mechanism according to claim 3, characterized in that: A plurality of groups of clamping blocks are arranged at the upper end of the inner wall of the fixing sleeve, the upper part of the clamping blocks is provided with a guide edge, and the lower part is provided with clamping teeth, and the number of the clamping blocks is consistent with the number of the guide blocks.

6. A self-locking mechanism according to claim 5, characterized in that: The guide ring is provided with guide teeth on its upper edge, the number of the guide teeth is double the number of the guide blocks and the clamping blocks, and the guide teeth and the clamping teeth are staggered.

7. A self-locking mechanism according to claim 1, characterized in that: A wall groove is arranged at the lower end of the inner wall of the fixing sleeve, a positioning convex strip is arranged in the wall groove, a wall convex strip matching the wall groove is arranged on the guide ring, and a positioning groove matching the positioning convex strip is arranged on the wall convex strip.

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