Multi-thread orientation structure

Abstract

The utility model discloses a multi-head thread orientation structure. The unique relative direction between two parts can be determined after the multi-head thread orientation structure is screwed. Comprising a first thread arranged on a first component and a second thread arranged on a second component and matched with the first thread, and the first thread and the second thread are correspondingly multi-line threads; the orientation structure comprises a first orientation part arranged on the first component and a second orientation part correspondingly arranged on the second component; when the first orientation part and the second orientation part are in oriented butt joint, the first thread and the second thread are screwed in in an oriented mode, and the first component and the second component are screwed in an oriented mode.

Description

Technical Field

[0001] This utility model belongs to the technical field of threaded connection structures, and particularly relates to a multi-start thread directional structure. Background Technology

[0002] Threaded connections are widely used, typically including single-start and multi-start thread structures. In a single-start thread structure, the relative orientation of the two components after screwing in is fixed. However, in a multi-start thread structure, the relative orientation of the two components after screwing in is uncertain. For example, in a double-start thread, the two helical lines have a 180° phase difference on the circumference (i.e., the starting points are half a turn apart). After screwing in, the observation point may be in the correct desired direction or it may be 180° away from the desired direction. Therefore, multi-start threads cannot determine the relative orientation of the two components after screwing in. When using multi-start threads on products that require both the advantages of multi-start threads and directional orientation, improvements are needed. Summary of the Invention

[0003] The purpose of this invention is to provide a multi-threaded directional structure that, after being screwed in, can determine a unique relative direction between two components.

[0004] To achieve the above objectives, the present invention adopts the following technical solution.

[0005] A multi-start thread orientation structure includes a first thread provided on a first component and a second thread provided on a second component that mates with the first thread, wherein both the first thread and the second thread are multi-start threads; the orientation structure includes a first orientation portion provided on the first component and a corresponding second orientation portion provided on the second component; when the first orientation portion and the second orientation portion are oriented to engage, the first thread and the second thread are oriented to screw into each other, and the first component and the second component are oriented to engage.

[0006] Using the above technical solution, both the first and second threads are double-start threads with a large lead. During the engagement between the first and second components, only a small engagement angle is needed to tighten them. By setting an orientation structure, the first and second threads can only be engaged and screwed in after the first and second orientation parts are aligned. Therefore, the direction of engagement between the first and second components can be determined, and they always maintain a relative direction after engagement, unlike double-start threads which may randomly rotate 180 degrees. This solves the problems of existing double-start threads while maintaining the advantage of the large lead of double-start threads.

[0007] Preferably, the first directional part is configured as a protrusion; the lower end of the protrusion is not higher than the thread start position of the first thread in the axial direction; the second directional part is configured as a directional notch for the first directional part to pass through and a clearance space for the protrusion of the first directional part to move; the clearance space is connected to the directional notch.

[0008] By adopting the above technical solution, and by setting the first directional part and the second directional part as a protrusion and a directional notch respectively, the direction of screwing in can be well determined. At the same time, by setting the clearance space, the protrusion can be provided with room to move when screwing in and out, avoiding interference with the second thread.

[0009] Preferably, the second thread is configured as a thread groove; the clearance space is configured as a directional thread groove that matches the protrusion of the first directional part.

[0010] Using the above technical solution, the spiral groove design allows the first thread and the first directional part to be clearly limited and screwed in, avoiding any misalignment between the thread pitch; moreover, the thread groove design makes it easier to design a directional notch to connect with the thread groove, and the first directional part enters the directional notch and then cooperates with the thread groove to enter, thereby giving it a guiding function.

[0011] Preferably, the first thread is a thread segment; each first thread segment does not overlap axially; the starting and ending positions of two adjacent first thread segments are spaced apart circumferentially; the protrusion of the first directional part is located within this space.

[0012] By adopting the above technical solution, this structure is equivalent to having a shorter first thread length, less than one turn, which allows the first directional part to be positioned within the circumferential interval between the two first threads; this avoids the first directional part coinciding with the first thread in the axial direction, which makes it easier for the user to identify the position of the first directional part more quickly, and at the same time makes it easier to set the second directional part on the second component, so that it can easily avoid the second thread.

[0013] Preferably, the protrusion of the first orientation portion is configured as a threaded segment, the thread starting position of which is not higher than the thread starting position of the first thread, and the thread helix angle and thread height are the same as those of the first thread.

[0014] By adopting the above technical solution, by setting the protrusion as a threaded segment and having the same thread parameters as the first thread, the first directional part can be spirally raised and lowered synchronously with the first thread. The thread setting can make the first directional part less prone to wear and make it smoother when screwed in.

[0015] Preferably, the starting position of the second thread is connected to a thread notch through which the first thread passes.

[0016] By adopting the above technical solution, the threaded notch is set to facilitate the screwing in of the first thread after it is connected with the threaded notch, which can optimize the screwing in accuracy. That is, after the first thread and the first directional part are connected and inserted with the threaded notch and the directional notch respectively, they can correspond to the second thread and the entrance of the clearance space respectively. Therefore, the first thread and the first directional part can enter their own independent running paths, and will not cause jamming or blocking.

[0017] Preferably, the end of the thread notch away from the second thread is the thread stop portion; the end of the directional notch away from the directional thread groove is the directional stop portion.

[0018] By adopting the above technical solution and setting a threaded stop and a directional stop, the first and second components can be stopped before being pulled out during unscrewing, thus preventing the first or second component from detaching and falling directly after being unscrewed. Attached Figure Description

[0019] Figure 1 This is a three-dimensional exploded structural diagram of the present invention.

[0020] Figure 2 yes Figure 1 A three-dimensional structural diagram of the first component.

[0021] Figure 3 yes Figure 1 A three-dimensional structural diagram of the second component. Detailed Implementation

[0022] To make the technical solution of this utility model clearer, the following description is in conjunction with the appendix. Figures 1 to 3 This specification provides a detailed description of the present invention. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the scope of protection of the present invention.

[0023] This utility model is a multi-start thread orientation structure, including a first thread 11 on a first component 1 and a second thread 21 on a second component 2, wherein the first thread 11 and the second thread 21 are correspondingly fitted and both are multi-start threads; it also includes an orientation structure, including a first orientation part 12 on the first component 1 and a corresponding second orientation part 22 on the second component 2; when the first orientation part 12 and the second orientation part 22 are oriented and connected, the first thread 11 and the second thread 21 can be oriented and screwed in, realizing the oriented engagement of the first component 1 and the second component 2; in this structure, the first orientation part 12 and the second orientation part 22 are used to determine the relative direction when the first component 1 and the second component 2 are screwed in, avoiding the problem of not being oriented each time due to the multi-start thread.

[0024] In one embodiment, the first directional part 12 is a protrusion, and the second directional part 22 is configured as a clearance space for the first directional part 12 to move through, and a directional notch 221 for the first directional part 12 to pass through; the directional notch 221 is connected to the clearance space.

[0025] In use, the protrusion of the first directional part 12 is aligned with the directional notch 211 and then inserted. The protrusion falls into the entrance of the clearance space, and the first thread and the second thread are also ready to mesh and screw in. Then, continue to screw in. In this way, the screwing direction of the first part and the second part can be clearly defined each time, so that their relative directions after screwing in are consistent.

[0026] In one embodiment, the clearance space can be a gap between the first component and the second component to avoid the second thread.

[0027] In one embodiment, the clearance space can be a directional spiral groove 222 provided on the second component. The thread helix angle of the directional thread groove 222 is the same as that of the second thread, which facilitates the smooth synchronous screwing in and out of the protrusion and the first thread, and avoids engagement jamming due to different thread parameters. In this embodiment, the second thread can also be set as a thread groove structure.

[0028] In one embodiment, the lower end of the protrusion is not higher than the thread start position of the first thread 11 in the axial direction. This facilitates the protrusion to connect with the orientation notch in advance, which is convenient for orientation. It also ensures that it can only be screwed in after the first orientation part and the second orientation part are connected, which has the function of preventing mistaken insertion.

[0029] In one embodiment, the first thread 11 is a thread segment; each segment of the first thread 11 has no overlap in the circumferential direction; the starting and ending positions of two adjacent segments of the first thread 11 are spaced apart in the circumferential direction; the protrusion of the first directional part 12 is provided within the space; in such an embodiment, a thread notch 211 for the first thread 11 to pass through can also be provided at the thread starting position of the second thread 21; to further enhance the directional and error-proof function.

[0030] In one embodiment, the end of the threaded notch 211 away from the second thread 21 is a threaded stop portion 212; the end of the directional notch 221 away from the directional thread groove 222 is a directional stop portion 223.

[0031] In one embodiment, the protrusion of the first directional part 12 is configured as a threaded segment, the thread starting position of which is not higher than the thread starting position of the first thread 11, and the thread helix angle and thread height are the same as those of the first thread 11; the threaded structure will be smoother during the screwing in and out process, which can avoid excessive wear of the first directional part 12 and increase its service life.

[0032] It should be noted that the clearance space is not limited to the solutions of the two embodiments described above; it is only necessary to ensure that the protrusion of the first directional part 12 does not cause interference.

Claims

1. A multi-start thread orientation structure, comprising a first thread (11) provided in a first component (1), and a second thread (21) provided in a second component (2) that mates with the first thread (11), wherein both the first thread (11) and the second thread (21) are multi-start threads; characterized in that: The orientation structure includes a first orientation part (12) disposed on the first component (1) and a corresponding second orientation part (22) disposed on the second component (2). When the first directional part (12) and the second directional part (22) are oriented to connect, the first thread (11) and the second thread (21) are oriented to screw into each other, and the first component (1) and the second component (2) are oriented to engage.

2. The multi-start thread directional structure according to claim 1, characterized in that: The first directional part (12) is configured as a protrusion; The lower end of the protrusion is not higher than the thread start position of the first thread (11) in the axial direction; The second directional part (22) is configured with a directional notch (221) through which the first directional part (12) passes and a clearance space for the protrusion of the first directional part (12) to move; The avoidance space is connected to the directional gap (221).

3. The multi-start thread directional structure according to claim 2, characterized in that: The second thread (21) is configured as a thread groove; The clearance space is set as a directional threaded groove (222) that matches the protrusion of the first directional part (12).

4. The multi-start thread orientation structure according to claim 3, characterized in that: The first thread (11) is a thread segment; each segment of the first thread (11) has no axial overlap. The starting and ending positions of two adjacent segments of the first thread (11) are spaced apart in the circumferential direction; The protrusion of the first directional part (12) is located within the interval.

5. A multi-start thread orientation structure according to any one of claims 2-4, characterized in that: The protrusion of the first orientation part (12) is configured as a threaded segment, the thread starting position of which is not higher than the thread starting position of the first thread (11), and the thread helix angle and thread height of the first thread (11) are the same.

6. A multi-start thread directional structure according to claim 4, characterized in that: The starting position of the second thread (21) is connected to a thread notch (211) through which the first thread (11) passes.

7. A multi-start thread directional structure according to claim 6, characterized in that: The end of the thread notch (211) away from the second thread (21) is the thread stop (212). The end of the directional notch (221) away from the directional thread groove (222) is the directional stop (223).

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