Fastening device with tolerance compensation function

Abstract

The utility model provides a fastening device with a tolerance compensation function, and belongs to the technical field of automobile accessories. The fastening device solves the problems that an existing fastening device with a tolerance compensation function is inconvenient to machine and high in cost. The fastening device with the tolerance compensation function is used for connecting a first component and a second component, a containing groove is formed in the first component, a plurality of bosses are arranged on the inner wall of the containing groove in a protruding mode, the fastening device comprises an adjuster rotatably arranged in the containing groove, a plurality of spiral guide grooves matched with the bosses are formed in the outer wall of the adjuster, and the spiral guide grooves are matched with the bosses. A through hole is formed in the adjuster, a locking bolt in threaded connection with the second component is arranged in the through hole in a penetrating mode, and an anti-disengaging structure used for preventing the locking bolt from disengaging is installed on the adjuster. The anti-falling structure and the regulator are designed in a split mode, machining is convenient, after the anti-falling structure is damaged, only the anti-falling structure needs to be replaced independently, and the use cost is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile accessories and relates to a fastening device with a tolerance compensation function. Background Art

[0002] A Chinese patent discloses a fastening device with a tolerance compensation function [application publication number CN112049844A], which is used to fasten a first component to a second component, and includes: a locking bolt, which has a screw head portion for matching a driving tool, a threaded portion for connecting various components, and a stop portion for limiting and located between the screw head portion and the threaded portion; a receiving groove, which is arranged on the first component; a stopper, which is arranged on the second component, and a threaded hole matching the threaded portion on the locking bolt is provided in the stopper; a tolerance compensation element, which has a through hole for the locking bolt to enter and exit, and the tolerance compensation element can abut against the stopper. A plurality of bosses are convexly provided on the inner wall of the receiving groove, and a plurality of spiral guide grooves matching the bosses are provided on the outer wall of the tolerance compensation element, and the purpose of adjusting the assembly tolerance between the first component and the second component is achieved by controlling the rotation angle of the tolerance compensation element.

[0003] In the above-mentioned fastening device, in order to prevent the locking bolt from being lost during operation, a plurality of limit spring buckles are provided on the inner wall of the tolerance compensation element, and the limit spring buckles can be in contact with the locking bolt to form a limit fit. Since the limit spring buckles are integrated with the tolerance compensation element, the unreasonable structural design makes it difficult to manufacture and the processing cost is high; once the limit spring buckles are damaged, the entire tolerance compensation element will be scrapped, and the use cost is high. Utility Model Content

[0004] The utility model aims to solve the above problems in the prior art and proposes a fastening device with a reasonable structural design and a tolerance compensation function.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A fastening device with a tolerance compensation function is used to connect a first component and a second component. The first component is provided with a receiving groove, and a plurality of bosses are protruding from the inner wall of the receiving groove. The fastening device includes an adjuster rotatably arranged in the receiving groove, and a plurality of spiral guide grooves matched with the bosses are provided on the outer wall of the adjuster. A through hole is provided in the adjuster, and a locking bolt threadedly connected to the second component is passed through the through hole. An anti-slip structure for preventing the locking bolt from falling off is installed on the adjuster.

[0007] The regulator is cylindrical, and the rotation directions of several spiral guide grooves are the same, and they are arranged one by one with multiple bosses. The position of the boss in the spiral guide groove is different when the rotation angle of the regulator is different, so as to adjust the distance between the first component and the second component. The through hole extends along the depth direction of the accommodating groove (the axial direction of the regulator), and the aperture of the through hole is smaller than the outer diameter of the rod head of the locking bolt. The rod head of the locking bolt is restricted between the anti-slip structure and the regulator and will not fall off. The anti-slip structure and the regulator are designed to be separated. When in use, you only need to install the anti-slip structure on the regulator. The structural design is reasonable. If the anti-slip structure is damaged, you only need to replace the anti-slip structure separately, and the cost of use is low.

[0008] In the above-mentioned fastening device with tolerance compensation function, the adjuster is provided with an installation cavity for accommodating the anti-slip structure, the through hole is located at the bottom of the installation cavity, and the rod head of the locking bolt is confined between the anti-slip structure and the bottom of the installation cavity.

[0009] In the above-mentioned fastening device with tolerance compensation function, the anti-slip structure includes a limiting fixing ring with an outer diameter smaller than the inner diameter of the installation cavity and resting against the bottom of the installation cavity, the rod head of the locking bolt is located on the inner side of the limiting fixing ring, the limiting fixing ring has a limiting portion extending inward to above the rod head of the locking bolt and a number of elastic expansion petals evenly distributed circumferentially, a number of the elastic expansion petals extend obliquely outward, and the inner wall of the installation cavity has a limiting step for resting against the elastic expansion petals.

[0010] The limiting fixing ring is annular, and the distance from the limiting part to the bottom of the installation cavity is slightly larger than the thickness of the locking bolt rod head, providing space for the locking bolt rod head to move; the distance from the limiting step to the bottom of the installation cavity is slightly larger than the farthest distance from the elastic expansion petal to the bottom of the installation cavity; the maximum outer diameter of the expansion part formed by several elastic expansion petals is larger than the inner diameter of the installation cavity, and the limiting step is arranged opposite to the bottom of the installation cavity.

[0011] During installation, insert the locking bolt into the through hole so that the rod head of the locking bolt rests against the bottom of the installation cavity, and then put the limit fixing ring into the installation cavity and move it inward. During this process, a number of elastic expanding petals are elastically deformed by the squeezing of the inner wall of the installation cavity and move inward. When the limit fixing ring completely rests against the bottom of the installation cavity, a number of elastic expanding petals are reset under the action of their own elastic force and are restricted to the inner side of the limit step.

[0012] In the above-mentioned fastening device with tolerance compensation function, the inner wall of the installation cavity is provided with a plurality of paving grooves arranged one-to-one corresponding to the elastic expansion petals, and the side of the paving groove opposite to the bottom of the installation cavity is a limiting step.

[0013] The width of the clearance groove is slightly larger than the width of the elastic expansion flap, and the elastic expansion flap can be rotationally limited, thereby realizing the circumferential limitation of the limit fixing ring.

[0014] In the above-mentioned fastening device with tolerance compensation function, the inner wall of the installation cavity is provided with a plurality of reinforcing ribs evenly distributed in the circumferential direction, and the limit fixing ring is provided with a plurality of clearance openings arranged one by one corresponding to the reinforcing ribs. The reinforcing ribs can improve the structural strength of the adjuster, and can accurately locate the circumferential position between the limit fixing ring and the adjuster, so as to facilitate the elastic expansion petal to quickly align with the clearance groove.

[0015] In the above-mentioned fastening device with tolerance compensation function, the number of the reinforcing ribs is equal to the number of the elastically expanded petals, and the reinforcing ribs are arranged at intervals from the elastically expanded petals.

[0016] There is a reinforcing rib between every two elastic expansion petals, and there is an elastic expansion petal between every two reinforcing ribs, so that the elastic expansion petals can be quickly aligned with the give way groove.

[0017] In the above-mentioned fastening device with tolerance compensation function, the outer periphery of the locking bolt rod head has a supporting portion, and the supporting portion is limited between the limiting portion and the bottom of the installation cavity. The distance from the limiting portion to the bottom of the installation cavity is slightly greater than the thickness of the supporting portion.

[0018] Compared with the prior art, the fastening device with tolerance compensation function has the following advantages: reasonable structural design, the limit fixing ring and the adjuster are designed as a separate unit, which reduces the processing difficulty and thus reduces the processing cost; when the elastic expansion flap is damaged, only the limit fixing ring needs to be replaced, which reduces the use cost; the operation is simple and the adjustment effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an exploded schematic diagram of the fastening device provided by the utility model.

[0020] Figure 2 It is a cross-sectional view of the fastening device provided by the utility model in an exploded state.

[0021] Figure 3 It is a cross-sectional view of the fastening device provided by the utility model.

[0022] Figure 4 It is a top view of the fastening device provided by the utility model.

[0023] In the figure, 1. adjuster; 11. spiral guide groove; 12. through hole; 13. mounting cavity; 14. limiting step; 15. clearance groove; 16. reinforcing rib; 2. locking bolt; 21. rod head; 22. abutment part; 3. limiting fixing ring; 31. limiting part; 32. elastic expansion flap; 33. clearance opening. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0025] The fastening device with tolerance compensation function is used to connect a first component and a second component. In this embodiment, the first component is a handle base and the second component is a door sheet metal. A cylindrical receiving groove is provided on the first component, and a plurality of axially evenly distributed bosses are convexly provided on the inner wall of the receiving groove.

[0026] like Figure 1-3 As shown, the fastening device includes an adjuster 1 rotatably arranged in the accommodating groove. The adjuster 1 is cylindrical and coaxially arranged with the accommodating groove. A plurality of spiral guide grooves 11 are provided on the outer wall of the adjuster 1 and are matched with the bosses one by one. The rotation directions of the plurality of spiral guide grooves 11 are the same. By rotating the angle of the adjuster 1, the bosses can be located at different positions of the spiral guide grooves 11.

[0027] In order to connect the regulator 1 to the second component, as Figure 2 and Figure 3 As shown, a mounting cavity 13 is coaxially provided in the regulator 1, a through hole 12 is coaxially provided at the bottom of the mounting cavity 13, a locking bolt 2 is passed through the through hole 12, a threaded hole threadedly matched with the locking bolt 2 is provided on the second component, and the locking bolt 2 passed through the through hole 12 can connect the regulator 1 to the second component.

[0028] like Figure 1 and Figure 2 As shown, the outer periphery of the rod head 21 of the locking bolt 2 has a butting portion 22. In order to prevent the locking bolt 2 from falling off, an anti-slip structure is provided in the regulator 1, and the butting portion 22 is limited between the anti-slip structure and the bottom of the mounting cavity 13. The aperture of the through hole 12 is smaller than the outer diameter of the butting portion 22, and the anti-slip structure and the regulator 1 are designed separately. When in use, the anti-slip structure only needs to be installed on the regulator 1. After the anti-slip structure is damaged, it only needs to be replaced separately, and the use cost is low.

[0029] like Figure 2-3 As shown, the anti-slip structure includes a limiting fixing ring 3 whose outer diameter is smaller than the inner diameter of the installation cavity 13 and abuts against the bottom of the installation cavity 13. The rod head 21 of the locking bolt 2 is located on the inner side of the limiting fixing ring 3. The limiting fixing ring 3 has a limiting portion 31 extending inwardly to above the abutting portion 22 and a plurality of elastic expansion petals 32 evenly distributed circumferentially. A plurality of elastic expansion petals 32 extend obliquely outward, and the inner wall of the installation cavity 13 has a limiting step 14 for abutting against the elastic expansion petals 32.

[0030] The limiting fixing ring 3 is annular, and the distance from the limiting part 31 to the bottom of the installation cavity 13 is slightly greater than the thickness of the abutting part 22, providing a movable space for the rod head 21 of the locking bolt 2. The distance from the limiting step 14 to the bottom of the installation cavity 13 is slightly greater than the farthest distance from the elastic expansion flap 32 to the bottom of the installation cavity 13. The outer diameter of the expansion part composed of a plurality of elastic expansion flaps 32 gradually decreases from the end away from the bottom of the installation cavity 13 to the bottom of the installation cavity 13. During installation, the locking bolt 2 is inserted into the through hole 12, so that the abutting part 22 abuts against the bottom of the installation cavity 13, and then the limiting fixing ring 3 is placed in the installation cavity 13 and moves inward. In this process, a plurality of elastic expansion flaps 32 are squeezed by the inner wall of the installation cavity 13 and elastically deformed and move inward. When the limiting fixing ring 3 completely abuts against the bottom of the installation cavity 13, a plurality of elastic expansion flaps 32 are reset under the action of their own elastic force and are restricted to the inner side of the limiting step 14.

[0031] Further, such as Figure 2 As shown, the inner wall of the installation cavity 13 is provided with a plurality of paving grooves 15 corresponding to the elastic expansion flaps 32, and the side of the paving grooves 15 opposite to the bottom of the installation cavity 13 is a limiting step 14. The width of the paving grooves 15 is slightly larger than the width of the elastic expansion flaps 32, and the elastic expansion flaps 32 can be rotationally limited, thereby realizing the circumferential limit of the limit fixing ring 3.

[0032] like Figure 4 As shown, the inner wall of the installation cavity 13 is provided with a plurality of reinforcing ribs 16 evenly distributed in the circumferential direction, and the position-limiting fixing ring 3 is provided with a plurality of ditching openings 33 arranged one-to-one corresponding to the reinforcing ribs 16. The reinforcing ribs 16 can improve the structural strength of the regulator 1, and can accurately locate the circumferential position between the position-limiting fixing ring 3 and the regulator 1, so as to facilitate the elastic expansion flap 32 to quickly align with the ditching groove 15.

[0033] like Figure 4 As shown, the number of reinforcing ribs 16 is equal to the number of elastic expansion petals 32, both of which are four, and the reinforcing ribs 16 and the elastic expansion petals 32 are arranged at intervals. That is, there is a reinforcing rib 16 between every two elastic expansion petals 32, and there is an elastic expansion petal 32 between every two reinforcing ribs 16, so that the elastic expansion petals 32 can be quickly aligned with the clearance groove 15.

[0034] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A fastening device with tolerance compensation function, used to connect a first component and a second component, wherein the first component is provided with a receiving groove, and a plurality of bosses are convexly provided on the inner wall of the receiving groove, characterized in that: The fastening device comprises an adjuster (1) rotatably arranged in a receiving groove, a plurality of spiral guide grooves (11) adapted to the boss are provided on the outer wall of the adjuster (1), a through hole (12) is provided in the adjuster (1), a locking bolt (2) threadedly connected to the second component is passed through the through hole (12), and an anti-drop structure for preventing the locking bolt (2) from falling off is installed on the adjuster (1).

2. The fastening device with tolerance compensation function according to claim 1, characterized in that: The regulator (1) is provided with a mounting cavity (13) for accommodating an anti-slip structure, the through hole (12) is located at the bottom of the mounting cavity (13), and the rod head (21) of the locking bolt (2) is restricted between the anti-slip structure and the bottom of the mounting cavity (13).

3. The fastening device with tolerance compensation function according to claim 2, characterized in that: The anti-slip structure comprises a limiting fixing ring (3) whose outer diameter is smaller than the inner diameter of the installation cavity (13) and abuts against the bottom of the installation cavity (13); the rod head (21) of the locking bolt (2) is located on the inner side of the limiting fixing ring (3); the limiting fixing ring (3) has a limiting portion (31) extending inwardly to above the rod head (21) of the locking bolt (2) and a plurality of circumferentially evenly distributed elastic expansion flaps (32); a plurality of the elastic expansion flaps (32) extend outwardly at an angle; and the inner wall of the installation cavity (13) has a limiting step (14) for abutting against the elastic expansion flap (32).

4. The fastening device with tolerance compensation function according to claim 3, characterized in that: The inner wall of the installation cavity (13) is provided with a plurality of paving grooves (15) arranged in one-to-one correspondence with the elastic expansion flaps (32), and the side of the paving groove (15) opposite to the bottom of the installation cavity (13) is a limiting step (14).

5. The fastening device with tolerance compensation function according to claim 3, characterized in that: The inner wall of the installation cavity (13) is provided with a plurality of reinforcing ribs (16) evenly distributed in the circumferential direction, and the position limiting fixing ring (3) is provided with a plurality of clearance openings (33) arranged in one-to-one correspondence with the reinforcing ribs (16).

6. The fastening device with tolerance compensation function according to claim 5, characterized in that: The number of the reinforcing ribs (16) is equal to the number of the elastic expansion flaps (32), and the reinforcing ribs (16) and the elastic expansion flaps (32) are arranged at intervals.

7. The fastening device with tolerance compensation function according to claim 3, characterized in that: The outer periphery of the rod head (21) of the locking bolt (2) is provided with a supporting portion (22), and the supporting portion (22) is restricted between the limiting portion (31) and the bottom of the installation cavity (13).

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