Self-locking structure suitable for threaded connection position

Abstract

The utility model provides a self-locking structure suitable for a threaded connection part, which relates to the technical field of self-locking, and comprises a cylinder body, a first outer thread, a second outer thread, a first locking part and a second locking part, the adjusting block is located at the bottom of the barrel, and the central axis of the adjusting block coincides with the central axial direction of the barrel; a screw hole is formed in the bottom end face of the adjusting block and used for being in threaded connection with a screw. The outer wall face of the adjusting block is provided with a second external thread with the same screwing direction as the first external thread. One end of the connecting part is connected with the bottom of the barrel, and the other end is connected with the top of the adjusting block; and a gap is formed between the cylinder body and the adjusting block, and when the screw is in threaded connection with the interior of the screw hole, the screw extrudes the end, facing the cylinder body, of the screw, so that the size of the gap is changed. According to the self-locking structure, the self-locking function can be achieved after a thread locking mode is adopted for locking, and the thread locking position is prevented from loosening.

Description

TECHNICAL FIELD

[0001] The utility model relates to a self locking technical field, concretely relates to a self locking structure suitable for threaded connection. BACKGROUND

[0002] The existing threaded locking mode mainly has mechanical anti-loosening, riveting anti-loosening, structural anti-loosening and the like, and the above-mentioned modes are realized by axial pre-tightening force generated when being twisted. The pre-tightening force of the above-mentioned anti-loosening mode will gradually decrease to cause loosening in severe vibration, and the loosening of the threaded locking position has three forms of transverse displacement, transverse translation and axial strain, and these loosening will cause displacement of the threaded locking position, and with the increase of vibration times, the lost pre-tightening force slowly increases, and finally will cause the threaded locking position to be loosened. SUMMARY

[0003] The utility model discloses to solve the loosening problem caused by various influences when using the threaded locking mode, provides a self locking structure suitable for threaded connection, can realize the function of self locking after locking by the threaded locking mode, prevents the threaded locking position from loosening.

[0004] The utility model discloses a technical scheme that is:

[0005] Provide a self locking structure suitable for threaded connection, comprising:

[0006] The outer wall surface of the cylinder is provided with a first outer thread;

[0007] The adjusting block is located at the bottom of the cylinder, and the central axis of the adjusting block coincides with the central axis of the cylinder. A threaded hole is formed in the bottom end face of the adjusting block for threaded connection of the screw. The outer wall surface of the adjusting block is provided with a second outer thread with the same rotation direction as the first outer thread;

[0008] The connecting part is connected with the bottom of the cylinder at one end and connected with the top of the adjusting block at the other end;

[0009] The gap between the cylinder and the adjusting block changes in size when the screw is threaded into the threaded hole.

[0010] Optionally, the connecting part is at least two, and is distributed between the cylinder and the adjusting block in the circumferential direction with the central axis of the cylinder as the rotation axis.

[0011] Optionally, the bottom end face of the cylinder is provided with a threaded groove corresponding to the threaded hole, and the screw is threaded with the cylinder through the threaded groove.

[0012] Optionally, a clamping groove is formed in the top end face of the cylinder, the clamping groove is connected with the inside of the cylinder, and the clamping groove is used for placing the bearing.

[0013] Optionally, a sealing groove is formed on the outer wall surface of the cylinder body, and the sealing groove is distributed on the outer wall surface of the cylinder body in a circumferential direction with the central axis of the cylinder body as a rotation axis.

[0014] Optionally, an inclined surface is arranged on the outer wall surface of the cylinder body in a circumferential direction and inclined towards the central axis of the cylinder body, so that the outer diameter of the top end surface of the cylinder body is smaller than the outer diameter of the bottom end surface of the cylinder body.

[0015] Optionally, an oil seal groove is formed on the bottom end surface of the cylinder body, and the central axis of the oil seal groove coincides with the central axis of the cylinder body.

[0016] Optionally, a groove is further formed on the bottom end surface of the adjusting block and communicates with the screw hole.

[0017] Optionally, the top edge of the cylinder body and the bottom edge of the adjusting block are both chamfered.

[0018] Optionally, an adjusting hole is formed on the bottom of the adjusting block, and is used for adjusting the rotation feeding depth of the cylinder body.

[0019] The beneficial effects of the utility model are as follows:

[0020] When the cylinder body is connected to some connection positions which need to be locked by threads outside through the first external thread, the cylinder body drives the adjusting block to rotate through the connecting part, the adjusting block is threadedly connected to different connection positions of the same connection position through the second external thread, at this time, the screw is screwed into the screw hole, so that the screw is threadedly connected with the adjusting block through the screw hole, after the screw is rotated to the top of the screw and contacts the bottom end surface of the cylinder body, the screw is continuously rotated and fed in the screw hole, and since the movement of the screw is blocked by the bottom of the cylinder body, the screw drives the end of the adjusting block, on which the screw is arranged, to move in the opposite direction of the screw during the rotation and feeding process, so that the gap between the cylinder body and the adjusting block is adjusted, the thread which is threadedly connected between the adjusting block and the thread connection position outside is pressed, and the locked and stuck state is achieved, so that the self-locking of the adjusting block is realized, and the self-locking of the cylinder body is indirectly realized, and the loosening of the cylinder body and the adjusting block after being threadedly connected to a connection position is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0022] Figure 1 It is a kind of self-locking structure's three-dimensional structure diagram suitable for thread connection Figure 1;

[0023] Figure 2 A perspective view of a self-locking structure for a threaded connection Figure 2 ;

[0024] Figure 3 A perspective view of a self-locking structure for a threaded connection Figure 1 ;

[0025] Figure 4 A perspective view of a self-locking structure for a threaded connection Figure 3 ;

[0026] Figure 5 A perspective view of a self-locking structure for a threaded connection Figure 4 ;

[0027] Figure 6 A perspective view of a self-locking structure for a threaded connection Figure 3 ;

[0028] Figure 7 A perspective view of a self-locking structure for a threaded connection Figure 6 ;

[0029] Reference signs:

[0030] 1 - cylinder, 10 - thread groove, 11 - clamping groove, 12 - sealing groove, 13 - bevel, 14 - oil seal groove

[0031] 2 - adjusting block, 20 - threaded hole, 21 - adjusting hole, 22 - groove, 23 - chamfer

[0032] 3 - connecting part, 4 - gap DETAILED DESCRIPTION

[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0034] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application.

[0035] The embodiments of the utility model will be described in detail below with reference to the drawings.

[0036] Embodiments

[0037] As Figures 1-3 shown, the embodiment discloses a self-locking structure suitable for threaded connection, comprising:

[0038] The outer wall surface of the cylinder body 1 is provided with a first outer thread.

[0039] The adjusting block 2 is located at the bottom of the cylinder body 1, and the central axis of the adjusting block 2 coincides with the central axis of the cylinder body 1; a screw hole 20 is formed in the bottom end surface of the adjusting block 2 for threaded connection of a screw; and the outer wall surface of the adjusting block 2 is provided with a second outer thread with the same rotation direction as the first outer thread.

[0040] The connecting part 3 is connected to the bottom of the cylinder body 1 at one end and connected to the top of the adjusting block 2 at the other end.

[0041] The gap 4 is formed between the cylinder body 1 and the adjusting block 2, and when the screw is threaded into the screw hole 20, the end of the screw towards the cylinder body 1 is pressed, so that the size of the gap 4 changes.

[0042] In use, the screw is rotated to feed into the screw hole 20, and when the bottom of the screw in the gap 4 contacts the end surface of the cylinder body 1 towards the adjusting block 2, the screw is continuously rotated, and the screw is rotated in the adjusting block 2 through the screw hole 20, at this time, since the bottom of the screw has contacted the end surface of the cylinder body 1 towards the adjusting block 2, the rotating screw will cause the adjusting block 2 to bend, and the bending direction is the direction in which the cylinder body 1 moves towards the adjusting block 2, in this process, the gap 4 between the cylinder body 1 and the adjusting block 2 changes with the continuous rotation of the screw, so that the second outer thread on the outer wall surface of the adjusting block 2 is locked and tightened, thereby achieving the self-locking effect.

[0043] In one of the embodiments, as Figures 1-5 shown, the connecting part 3 is at least two, and is distributed circumferentially between the cylinder body 1 and the adjusting block 2 with the central axis of the cylinder body 1 as the rotation axis.

[0044] In use, the connecting portions 3 are used to connect the barrel 1 and the adjusting block 2, so that the barrel 1 and the adjusting block 2 have the gap 4 to complete the self-locking. The connecting portions 3 are at least two, which are distributed circumferentially between the barrel 1 and the adjusting block 2 with the central axis of the barrel 1 as the rotation axis. Both of the connecting portions 3 are between the barrel 1 and the adjusting block 2, which play a connecting role while making the barrel 1 and the adjusting block 2 have the gap 4, so as to realize the self-locking function through the rotation of the adjusting screw subsequently. In the embodiment, two connecting portions 3 are arranged between the barrel 1 and the adjusting block 2, and the two connecting portions 3 are symmetrically distributed between the barrel 1 and the adjusting block 2 with the radius of the barrel 1 as the symmetric axis, so that the gap 4 between the barrel 1 and the adjusting block 2 is divided into two gaps 4 which are not communicated with each other by the two connecting portions 3. Correspondingly, the number of the screw holes 20 is also increased to two, and each screw hole 20 corresponds to and communicates with each gap 4, that is, when the screw in each screw hole 20 is rotated and fed, the size of the corresponding gap 4 can be adjusted, so as to strengthen the compression ability of the barrel 1 and the adjusting block 2 to the thread in the gap 4, and achieve the self-locking effect.

[0045] In the above embodiment, the barrel 1, the adjusting block 2 and the connecting portions 3 are integrally formed, which can strengthen the stability of the barrel 1 and the adjusting block 2 when self-locking.

[0046] In one of the embodiments, as shown in Figures 3-7 the bottom end surface of the barrel 1 is provided with a threaded groove 10 corresponding to the screw hole 20, and the screw is threadedly connected with the barrel 1 through the threaded groove 10.

[0047] When in use, the screw groove 10 can enable the screw to enter through the threaded connection, so as to adjust the gap 4 between the cylinder body 1 and the adjusting block 2, thereby achieving the self-locking effect. Specifically, the threaded groove 10 is opened at the end of the cylinder body 1 facing the adjusting block 2, the threaded groove 10 corresponds to the screw hole 20 opened on the adjusting block 2, and the central axis of the threaded groove 10 is consistent with the central axis of the screw hole 20, so as to satisfy that after the screw passes through the screw hole 20, the screw can continue to rotate and feed in the threaded groove 10. It should be noted here that when the threaded groove 10 is opened on the bottom end face of the cylinder body 1, the screw hole 20 on the adjusting block 2 at this time does not have the ability to threadedly connect with the screw, that is, the inner wall surface of the adjusting block 2 in the screw hole 20 is smooth without threads. The reason is that when the screw rotates and feeds in the screw hole 20 of the adjusting block 2, the screw will continue to rotate and feed in the direction of the threaded groove 10 at the gap 4 between the cylinder body 1 and the adjusting block 2 until the screw enters the threaded groove 10. At this time, in order to make the adjusting block 2 tilt towards the cylinder body 1 to change the gap 4 between the cylinder body 1 and the adjusting block 2, the screw head below the bottom end face of the adjusting block 2 needs to be in close contact with the adjusting block 2, so that when the screw rotates and feeds inside the cylinder body 1 through the threaded groove 10, the screw can drive the adjusting block 2 to tilt towards the cylinder body 1 to achieve the self-locking state. However, in this case, although the screw can continue to rotate and feed in the threaded groove 10, due to the close contact between the screw head and the adjusting block 2, the screw is difficult to continue to rotate and feed in the screw hole 20 along the central axis of the screw hole 20 towards the cylinder body 1. If the screw is continued to be turned to make the screw rotate and feed in the screw hole 20 and the threaded groove 10 at the same time, firstly, the amount of rotation and feeding of the screw in the screw hole 20 and the threaded groove 10 is small, which leads to small change range of the gap 4 between the cylinder body 1 and the adjusting block 2 and poor self-locking effect. Secondly, the continued rotation of the screw in the screw hole 20 is easy to damage the threads on the outer wall surface of the screw and the threads in the screw hole 20, thereby greatly reducing the self-locking effect of the threaded connection.

[0048] In summary, after the threaded groove 10 is opened at the end face of the cylinder body 1 facing the adjusting block 2, the screw hole 20 needs to satisfy that the inside is smooth without threads. Specifically, the self-locking process is that the screw passes through the screw hole 20, then enters the threaded groove 10 through the gap 4 between the cylinder body 1 and the adjusting block 2, so that the screw is threadedly connected between the threaded groove 10 and the cylinder body 1, and then the screw is started to be turned. After the screw head below the bottom of the adjusting block 2 is in contact with the bottom of the adjusting block 2, the screw is continued to be turned, and the screw will continue to rotate and feed in the threaded groove 10, so that the screw has a tendency to move towards the bottom of the threaded groove 10, which can drive the adjusting block 2 to tilt towards the cylinder body 1, adjust and reduce the gap 4 between the cylinder body 1 and the adjusting block 2, and make the threads at the gap 4 between the cylinder body 1 and the adjusting block 2 be pressed and stuck, thereby finally achieving the self-locking effect.

[0049] In one embodiment, as shown in Figure 2 The top end surface of the cylinder body 1 is provided with a clamping groove 11, which is connected to the inside of the cylinder body 1. The clamping groove 11 is used to place the bearing.

[0050] In use, the clamping groove 11 is used to place the bearing, which can achieve the effect of limiting and fixing the bearing. Specifically, the bottom of the cylinder body 1 is provided with a clamping groove 11, the center axis of the clamping groove 11 is consistent with the center axis of the cylinder body 1, and the inner diameter of the clamping groove 11 in the horizontal direction is greater than the inner diameter of the cylinder body 1. When the cylinder body 1 is fixed by the first external thread on the outer wall surface of the cylinder body 1 to the connecting part 3 with the bearing, the bearing is in the clamping groove 11 at this time, which can realize the supporting effect of the cylinder body 1 on the bearing, and avoid the rotation gap 4 between the rotating connecting body in the bearing and the inner hole of the cylinder body 1. In addition, the clamping groove 11 can limit the lateral movement of the bearing at the top of the cylinder body 1 to realize the limiting of the rotating connecting body in the bearing. Furthermore, moving the cylinder body 1 along the center axis of the bearing by a small part can save the space occupied by the cylinder body 1 and the adjusting block 2.

[0051] In one embodiment, as shown in Figure 1 and 2 The outer wall surface of the cylinder body 1 is provided with a sealing groove 12, which is distributed on the outer wall surface of the cylinder body 1 with the center axis of the cylinder body 1 as the rotation axis.

[0052] In use, the sealing groove 12 is used to place the sealing ring, which can realize the sealing effect after the cylinder body 1 is connected with the connecting part 3 by the first external thread.

[0053] In one embodiment, as shown in Figure 1 and 2 The outer wall surface of the cylinder body 1 is provided with an inclined surface 13 inclined towards the center axis of the cylinder body 1, so that the outer diameter of the top end surface of the cylinder body 1 is smaller than the outer diameter of the bottom end surface of the cylinder body 1.

[0054] In use, the inclined surface 13 is provided to facilitate the adjustment of the cylinder body 1 during the threaded connection. Specifically, the position of the inclined surface 13 is below the sealing groove 12, the part above the inclined surface 13 is closer to the center axis of the cylinder body 1, and the part below the inclined surface 13 is away from the center axis of the cylinder body 1. When the cylinder body 1 is rotated during the threaded connection, it is convenient to adjust and assemble the parts.

[0055] In one embodiment, as shown in Figure 5 The bottom end surface of the cylinder body 1 is provided with an oil seal groove 14, and the center axis of the oil seal groove 14 coincides with the center axis of the cylinder body 1.

[0056] When in use, an oil seal groove 14 is formed on the end face of the barrel 1 facing the adjusting block 2, the central axis of the oil seal groove 14 is consistent with the central axis of the barrel 1, and the inner diameter of the oil seal groove 14 is larger than the inner diameter of the barrel 1, that is, the inner wall surface of the barrel 1 has a stepped surface at the connection between the oil seal groove 14 and the inner hole of the barrel 1. The oil seal groove 14 is used for oil sealing operation, and the oil sealing operation is a skeleton oil seal. The stepped surface is suitable for the skeleton oil seal in the oil sealing operation, and the function of the skeleton oil seal is to isolate the parts that need to be lubricated in the transmission part from the output part, so as not to cause the lubricating oil to leak. It is usually used for rotating shaft, which is a kind of rotating shaft lip seal, plays a reinforcing role, and makes the oil seal maintain shape and tension.

[0057] In one embodiment, as shown in Figure 1 A groove 22 is formed on the bottom end face of the adjusting block 2 and communicates with the screw hole 20.

[0058] When in use, after the screw is rotated in the screw hole 20 to deform the adjusting block 2 and complete self-locking, the head of the screw is not flush with the bottom of the adjusting block 2 at this time, which will cause the screw to have an extra part of the head, which will occupy part of the space. To this end, the groove 22 is formed on the end face of the bottom of the adjusting block 2 and communicates with the screw hole 20. When the screw is rotated in the screw hole 20 to deform the adjusting block 2 and complete self-locking, the screw is completely inside the groove 22 at this time, avoiding the problem of space occupation of the screw head.

[0059] In one embodiment, as shown in Figure 1 and 2 The top edge of the barrel 1 and the bottom edge of the adjusting block 2 both have chamfers 23.

[0060] The chamfer 23 refers to the processing of cutting the corners of the workpiece into a certain bevel 13. The chamfer 23 is to remove burrs on the parts caused by machining, and also to facilitate the assembly of the parts. By providing chamfers 23 on the top edge of the barrel 1 and the bottom edge of the adjusting block 2, not only can the burrs on the barrel 1 and the adjusting block 2 be removed, but also the barrel 1 and the adjusting block 2 can be assembled conveniently.

[0061] In one embodiment, the bottom of the adjusting block 2 is provided with an adjusting hole 21 for adjusting the rotation feed depth of the barrel 1.

[0062] In use, the rotation of the adjusting block 2 can be adjusted by adjusting the adjusting hole 21, so as to adjust the rotation feeding depth of the barrel 1 and the adjusting block 2 at the screw locking position. Specifically, the adjusting hole 21 is arranged at the bottom of the adjusting block 2, and the adjusting hole 21 can be one or more, specifically according to the number of the connecting part 3, and the adjusting hole 21 is arranged at a position corresponding to the connecting part 3, that is, the adjusting hole 21 arranged at the bottom of the adjusting block 2 extends to the inside of the connecting part 3, compared with the adjusting hole 21 arranged at a position corresponding to the gap 4 between the barrel 1 and the adjusting block 2, the worker can adjust more stably, and the position to be bent on the adjusting block 2 is not affected.

[0063] Finally, it should be noted that: the above is only the preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations, and the embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other without conflict. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A self-locking structure suitable for threaded connections, characterized in that, include: The cylinder has a first external thread on its outer wall surface; An adjusting block is located at the bottom of the cylinder, and the central axis of the adjusting block coincides with the central axis of the cylinder; a screw hole is provided on the bottom end face of the adjusting block for threaded connection of a screw; a second external thread with the same direction of rotation as the first external thread is provided on the outer wall surface of the adjusting block. The connecting part has one end connected to the bottom of the cylinder and the other end connected to the top of the adjusting block; There is a gap between the cylinder and the adjusting block. When the screw is threaded into the inside of the screw hole, the screw is pressed toward one end of the cylinder, causing the size of the gap to change.

2. The self-locking structure for threaded connections according to claim 1, characterized in that, There are at least two connecting parts, which are circumferentially distributed between the cylinder and the adjusting block with the central axis of the cylinder as the axis of rotation.

3. The self-locking structure for threaded connections according to claim 2, characterized in that, The bottom end face of the cylinder is provided with a threaded groove corresponding to the screw hole, and the screw is threadedly connected to the cylinder through the threaded groove.

4. The self-locking structure for threaded connections according to claim 3, characterized in that, A slot is provided on the top end face of the cylinder, and the slot is connected to the interior of the cylinder. The slot is used to place the bearing.

5. The self-locking structure for threaded connections according to claim 4, characterized in that, A sealing groove is provided on the outer wall surface of the cylinder, and the sealing groove is distributed circumferentially on the outer wall surface of the cylinder with the central axis of the cylinder as the axis of rotation.

6. The self-locking structure for threaded connections according to claim 5, characterized in that, The outer wall of the cylinder is provided with a circumferentially inclined surface that is inclined toward the central axis of the cylinder, such that the outer diameter of the top end face of the cylinder is smaller than the outer diameter of the bottom end face of the cylinder.

7. The self-locking structure for threaded connections according to claim 6, characterized in that, An oil seal groove is provided on the bottom end face of the cylinder, and the central axis of the oil seal groove coincides with the central axis of the cylinder.

8. The self-locking structure for threaded connections according to claim 7, characterized in that, The bottom end face of the adjusting block is also provided with a groove that communicates with the screw hole.

9. The self-locking structure for threaded connections according to claim 8, characterized in that, The top edge of the cylinder and the bottom edge of the adjusting block are both chamfered.

10. The self-locking structure for threaded connections according to claim 9, characterized in that, The bottom of the adjusting block has an adjusting hole for adjusting the rotational feed depth of the cylinder.

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