Precise screw with variable thread pitch function

Abstract

The utility model discloses a precise screw with a variable thread pitch function, which belongs to the technical field of screw processing and comprises a screw body. The screw body comprises a rod body, a screw head is integrally arranged at one end of the rod body, a set of fixed threaded strips are arranged on the outer side of the rod body, movable threaded strips are arranged between the fixed threaded strips, a mounting base is movably arranged on the outer side of the rod body, and the movable threaded strips are mounted on the mounting base. According to the utility model, a group of fixed threaded strips are arranged on the rod body to serve as a reference, then the movable threaded strips are adjusted according to the requirement of screw pitches, and as the movable threaded strips are arranged on the mounting seats, the screw pitches between the movable threaded strips can be directly adjusted by replacing the mounting seats; and the position of the movable thread strip on the mounting seat can be adjusted, so that the adjustment of the thread pitch is realized, and the use scene of the screw is wider.

Description

Technical Field

[0001] This utility model relates to the field of screw processing technology, specifically a precision screw with variable thread pitch. Background Technology

[0002] Pitch: The distance between two adjacent threads, measured along the helix. Generally, it refers to the axial distance between two corresponding points on the pitch diameter of two adjacent teeth on the thread.

[0003] Traditional screws have their shape and pitch predetermined before manufacturing. This means that once the screw is manufactured, the pitch cannot be adjusted as needed during use. However, screws used inside automotive turbochargers are precision parts that require precise pitch. Traditional screws cannot be used with a fixed pitch, thus limiting their application scenarios. Utility Model Content

[0004] The purpose of this invention is to provide a precision screw with variable thread pitch. The movable thread strip and the fixed thread strip are designed as separate parts by a mounting base. The mounting base can be replaced as needed to match the movable thread strip and the fixed thread strip with different pitches to meet different thread pitch requirements, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a precision screw with variable thread pitch, comprising:

[0006] Screw body;

[0007] The screw body includes a rod, one end of which is integrally provided with a screw head. A set of fixed threaded strips is provided on the outer side of the rod, and a movable threaded strip is provided between the fixed threaded strips. A mounting seat is movably provided on the outer side of the rod, and the movable threaded strip is mounted on the mounting seat.

[0008] Preferably, a guide groove is provided on the outer side of the rod, and the mounting seat is screwed into the guide groove.

[0009] Preferably, the inner cavity of the guide groove is provided with a limiting groove, and the outer side of the mounting base is integrally provided with a retaining strip, which is spirally engaged in the limiting groove.

[0010] Preferably, the outer side of the mounting base has multiple sets of mounting slots, and the movable threaded strip is movably engaged in the mounting slot. The distance between adjacent movable threaded strips is the same as the distance between the fixed threaded strip and the adjacent movable threaded strip.

[0011] Preferably, the inner wall of the guide groove is provided with protrusions, and the surface of the mounting base is provided with grooves that engage with the protrusions.

[0012] Preferably, the diameter of the rod body gradually decreases at the end away from the screw head, and a cross-shaped opening groove is provided on the outer side of the screw head.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model sets a set of fixed threaded strips on the rod body as a reference, and then adjusts the movable threaded strips according to the required pitch. Since the movable threaded strips are set on the mounting base, the pitch between the movable threaded strips can be adjusted directly by changing the mounting base, or the position of the movable threaded strips on the mounting base can be adjusted to achieve pitch adjustment, making the application scenarios of the screw more extensive.

[0015] 2. This utility model prevents the mounting base from slipping in the guide groove due to gravity by setting protrusions and grooves, thus affecting the position of the movable threaded strip. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a three-dimensional structural diagram showing the disassembled screw body and mounting base of Embodiment 1 of this utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the mounting base and movable threaded strip in different forms according to Embodiment 1 of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram showing the disassembled mounting base and movable threaded strip in Embodiment 2 of this utility model.

[0020] The following are the labels in the diagram: 1. Screw body; 101. Rod; 102. Screw head; 2. Fixed threaded strip; 3. Movable threaded strip; 4. Mounting base; 5. Guide groove; 6. Limiting groove; 7. Clamping strip; 8. Mounting groove; 9. Protrusion; 10. Groove; 11. Cross-shaped opening groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1

[0023] like Figures 1-3 The precision screw shown has a variable thread pitch function and includes:

[0024] Screw body 1;

[0025] The screw body 1 includes a rod 101, one end of which is integrally provided with a screw head 102. A set of fixed threaded strips 2 are provided on the outer side of the rod 101, and a movable threaded strip 3 is provided between the fixed threaded strips 2. A mounting seat 4 is movably provided on the outer side of the rod 101, and the movable threaded strip 3 is mounted on the mounting seat 4.

[0026] By setting a set of fixed threaded bars 2 on the rod body 101 as a reference, the movable threaded bars 3 are then adjusted according to the pitch requirements. Since the movable threaded bars 3 are set on the mounting base 4, the pitch between the movable threaded bars 3 can be adjusted directly by replacing the mounting base 4.

[0027] Among them, such as Figure 2 As shown:

[0028] A guide groove 5 is provided on the outer side of the rod body 101, and the mounting seat 4 is spirally installed in the guide groove 5. The guide groove 5 facilitates the installation and storage of the mounting seat 4, so that the outer diameter of the mounting seat 4 is the same as the outer diameter of the rod body 101, without changing the external structure of the screw body 1.

[0029] Furthermore, such as Figure 2 As shown:

[0030] The inner cavity of the guide groove 5 is provided with a limiting groove 6, and the outer side of the mounting base 4 is integrally provided with a retaining strip 7. The retaining strip 7 is spirally engaged in the limiting groove 6. The limiting groove 6 is provided to facilitate the retaining strip 7 to limit the mounting base 4, preventing the mounting base 4 from moving outward in the guide groove 5 and causing the movable threaded strip 3 to shake.

[0031] It is worth noting that, such as Figure 2-3 As shown:

[0032] The inner wall of the guide groove 5 is provided with a protrusion 9, and the surface of the mounting base 4 is provided with a groove 10 that engages with the protrusion 9. The protrusion 9 and the groove 10 are provided to prevent the mounting base 4 from slipping in the guide groove 5 due to gravity and affecting the position of the movable threaded strip 3.

[0033] In a further preferred embodiment, such as Figure 1-2 As shown:

[0034] The diameter of the rod 101 gradually decreases at the end away from the screw head 102. A cross-shaped opening groove 11 is provided on the outer side of the screw head 102. By setting the structure of the rod 101, the end of the rod 101 away from the screw head 102 can easily insert the screw body 1 into the installation body. The cross-shaped opening groove 11 can be used with two different tools.

[0035] When using it, as needed, determine the required pitch of the screw body 1, then select the mounting base 4, and make the pitch between the movable threaded strips 3 on the mounting base 4 the same as the required pitch. Then, rotate the mounting base 4 along the guide groove 5 and snap it into the guide groove 5. Subsequently, the protrusion 9 snaps into the groove 10 on the mounting base 4 to limit and fix the mounting base 4, preventing the mounting base 4 from slipping. Then, the screw body 1 can be used normally.

[0036] Example 2

[0037] The difference from Embodiment 1 is that the movable threaded bar 3 on the outside of the mounting base 4 can be disassembled and assembled.

[0038] Preferred, such as Figure 4 As shown:

[0039] Multiple mounting slots 8 are provided on the outer side of the mounting base 4. The movable threaded strip 3 is movably engaged in the mounting slot 8. The distance between adjacent movable threaded strips 3 is the same as the distance between the fixed threaded strip 2 and adjacent movable threaded strips 3. The pitch between the movable threaded strips 3 can be adjusted by limiting the position of the mounting slot 8.

[0040] In practical use, it is first necessary to know the pitch value on the screw body 1. Then, the mounting base 4 is rotated and installed in the guide groove 5. At the same time, the mounting base 4 is fixed by the protrusion 9 and the groove 10. Then, the appropriate mounting groove 8 is selected according to the pitch. Subsequently, the movable threaded strip 3 is rotated and installed in the mounting groove 8. The screw body 1 with the appropriate pitch is assembled for use.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A precision screw having a variable thread pitch function, characterized by, Include: Screw body (1); The screw body (1) comprises a rod body (101), one end of the rod body (101) is integrally provided with a screw head (102), the outer side of the rod body (101) is provided with a group of fixed thread strips (2), the movable thread strips (3) are arranged between the fixed thread strips (2), the outer side of the rod body (101) movably provided with a mounting seat (4), the movable thread strips (3) are mounted on the mounting seat (4).

2. The precision screw with variable thread pitch function according to claim 1, characterized in that: The outer side of the rod body (101) is provided with a guide groove (5), and the mounting seat (4) is spirally installed in the guide groove (5).

3. The precision screw with variable thread pitch function according to claim 2, characterized in that: The inner cavity of the guide groove (5) is provided with a limiting groove (6), the outer side of the mounting seat (4) is integrally provided with a clamping strip (7), and the clamping strip (7) is spirally clamped in the limiting groove (6).

4. The precision screw with variable thread pitch function according to claim 1, characterized in that: The outer side of the mounting seat (4) is provided with a plurality of mounting grooves (8), the movable thread strips (3) are movably clamped in the mounting grooves (8), the distance between adjacent movable thread strips (3) is same as the distance between the fixed thread strips (2) and adjacent movable thread strips (3).

5. The precision screw with variable thread pitch function according to claim 2, characterized in that: The inner wall of the guide groove (5) is provided with a convex point (9), and the surface of the mounting seat (4) is provided with a recess (10) clamped with the convex point (9).

6. The precision screw with variable thread pitch function according to claim 1, wherein: The diameter of the rod body (101) away from the screw head (102) end gradually decreases, and the outer side of the screw head (102) is provided with a cross opening groove (11).

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