Fastening device capable of achieving tolerance compensation

Abstract

The utility model provides a fastening device capable of achieving tolerance compensation, and belongs to the technical field of automobile accessories. The problem that an existing fastening device is poor in structural stability is solved. The fastening device capable of achieving tolerance compensation is used for connecting a first component and a second component, a containing groove is formed in the first component, the fastening device comprises an adjuster which is arranged in the containing groove in a spiral running fit mode, a through hole is formed in the adjuster, a positioning block is arranged in the through hole, and a locking bolt which is in threaded connection with the second component is positioned on the positioning block. And a limiting structure for limiting the positioning block in the through hole is arranged on the regulator. During tolerance adjustment, the locking bolt moves along with the positioning block, the situation that the second buckle is separated from limiting of the locking bolt is avoided, and the structural stability is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile accessories and relates to a fastening device capable of realizing tolerance compensation. 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 and the locking bolt can be in contact and connected to form a limit fit. Since the limit spring buckle is located at the inner bottom of the tolerance compensation element, it is inconvenient to press the locking bolt into the inner side of the limit spring buckle; during the radial tolerance adjustment process, the locking bolt and the limit spring buckle move relative to each other, which may cause the locking bolt to be separated from the limit of the limit spring buckle on one side, thereby deteriorating its structural stability. Utility Model Content

[0004] The utility model aims to solve the above problems in the prior art and proposes a fastening device which can realize tolerance compensation and has no deterioration in structural stability.

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

[0006] A fastening device capable of achieving tolerance compensation is used to connect a first component and a second component, wherein the first component is provided with a receiving groove, and the fastening device includes an adjuster that is spirally rotated and engaged in the receiving groove, wherein a through hole is opened in the adjuster, wherein a positioning block is provided in the through hole, wherein a locking bolt that is threadably connected to the second component is positioned on the positioning block, and wherein the adjuster is provided with a limiting structure for limiting the positioning block in the through hole.

[0007] The adjuster is cylindrical, the through hole extends along the depth direction of the receiving groove, the locking bolt extends along the axial direction of the adjuster, the locking bolt is positioned on the positioning block, and the positioning block is restricted in the through hole to ensure that the locking bolt will not fall off. When adjusting the tolerance, the locking bolt will not be relatively displaced with the positioning block.

[0008] In the above-mentioned fastening device that can achieve tolerance compensation, the limiting structure includes an annular retaining edge arranged at one end of the through hole close to the second component and a limiting retaining ring arranged at one end of the through hole away from the second component, the positioning block is located between the annular retaining edge and the limiting retaining ring, and a guide structure is provided between the positioning block and the limiting retaining ring.

[0009] Under the action of the guide structure, the positioning block can move axially along the through hole, and a through hole is formed in the middle of the annular retaining edge. After the locking bolt passes through the through hole, it is threadedly connected with the second component. The guide structure can guide and limit the positioning block to prevent the positioning block and the locking bolt from tilting.

[0010] In the above-mentioned fastening device that can achieve tolerance compensation, the guide structure includes a plurality of guide holes provided on the limit ring and a plurality of guide rods provided on the positioning block and arranged one-to-one with the guide holes. The guide holes extend axially along the through hole, and the guide rods are inserted into the guide holes arranged correspondingly thereto.

[0011] In the above-mentioned fastening device that can achieve tolerance compensation, the outer ring of the positioning block is provided with a plurality of elastic arms whose number is equal to that of the guide rods and which are arranged one-to-one. The elastic arms extend circumferentially along the positioning block and one end is connected to the positioning block. The guide rod is arranged on the end of the corresponding elastic arm away from the positioning block.

[0012] The elastic arm provided can make the positioning block have radial motion redundancy relative to the limit retaining ring, so that the radial tolerance can be adjusted.

[0013] In the above-mentioned fastening device capable of realizing tolerance compensation, the limit retaining ring is provided with a plurality of first buckles extending into the through hole, the inner wall of the through hole has a plurality of bayonet holes corresponding to the first buckles one by one, and the first buckles are engaged in the corresponding bayonet holes.

[0014] The limit retaining ring and the adjuster are separately arranged and connected by means of a first buckle and a bayonet snap connection, which not only facilitates the installation of the positioning block into the through hole, but also improves the stability of the connection between the limit retaining ring and the adjuster.

[0015] In the above-mentioned fastening device that can achieve tolerance compensation, the middle part of the positioning block has a through hole for the locking bolt to pass through, the locking bolt is inserted into the through hole and the rod head of the locking bolt is abutted against the side of the positioning block away from the second component, and the positioning block is provided with a plurality of second buckles for positioning the rod head of the locking bolt on the positioning block.

[0016] The second clip is an elastic clip, and multiple second clips are evenly distributed around the circumference. When installing the locking bolt, you only need to align the rod of the locking bolt with the through hole, and then press the locking bolt to make multiple second clips elastically give way outward. When the locking bolt is in place, the second clip is reset under the elastic action to limit the locking bolt.

[0017] In the above-mentioned fastening device capable of achieving tolerance compensation, a plurality of spirally extending bosses are convexly provided on the inner wall of the accommodating groove, and a plurality of spiral guide grooves corresponding to the bosses are provided on the outer wall of the adjuster, and the bosses extend into the corresponding spiral guide grooves.

[0018] Compared with the prior art, the fastening device that can achieve tolerance compensation has the following advantages: when the tolerance is adjusted, the locking bolt moves with the positioning block, preventing the second buckle from disengaging from the limit on the locking bolt, and having good structural stability; when installing, the locking bolt is first installed on the positioning block, and then the positioning block is installed in the through hole, which is easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of an exploded view of a fastening device that can achieve tolerance compensation.

[0020] Figure 2 It is a cross-sectional view of the fastening device which can realize tolerance compensation.

[0021] Figure 3 yes Figure 2 Section view with locking bolts hidden.

[0022] In the figure, 1, first component; 2, accommodating groove; 3, adjuster; 4, positioning block; 5, locking bolt; 6, annular retaining edge; 7, limit retaining ring; 8, guide hole; 9, guide rod; 10, elastic arm; 11, first buckle; 12, second buckle; 13, boss; 14, spiral guide groove. DETAILED DESCRIPTION

[0023] 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.

[0024] like Figure 1-3 The fastening device capable of achieving tolerance compensation is used to connect a first component 1 and a second component, wherein the first component 1 is a handle base and the second component is a door sheet metal. A cylindrical receiving groove 2 is provided on the first component 1, and a plurality of spirally extending bosses 13 are provided in the receiving groove 2. In this embodiment, three bosses 13 are provided.

[0025] like Figure 1As shown, the fastening device includes a cylindrical adjuster 3 that is spirally rotated and fitted in the accommodating groove 2. The outer surface of the adjuster 3 is provided with three spiral guide grooves 14 that are arranged one by one with the bosses 13. The bosses 13 extend into the corresponding spiral guide grooves 14. By rotating the angle of the adjuster 3, the distance between the adjuster 3 and the second component can be adjusted, thereby realizing the axial tolerance adjustment.

[0026] like Figure 1 As shown, a through hole is coaxially opened in the regulator 3, a positioning block 4 is arranged in the through hole, a locking bolt 5 threadedly connected to the second component is positioned on the positioning block 4, and a limiting structure for limiting the positioning block 4 in the through hole is provided on the regulator 3.

[0027] like Figure 1-3 As shown, the limiting structure includes an annular retaining edge 6 provided at one end of the through hole close to the second member and a limiting retaining ring 7 provided at one end of the through hole away from the second member, the positioning block 4 is located between the annular retaining edge 6 and the limiting retaining ring 7, and a guiding structure is provided between the positioning block 4 and the limiting retaining ring 7. Under the action of the guiding structure, the positioning block 4 can move axially along the through hole, and a through hole is formed in the middle of the annular retaining edge 6. The locking bolt 5 is threadedly connected with the second member after passing through the through hole. The provided guiding structure can guide and limit the positioning block 4 to prevent the positioning block 4 and the locking bolt 5 from tilting.

[0028] like Figure 1-3 As shown, the guide structure includes two guide holes 8 provided on the limit ring 7 and two guide rods 9 provided on the positioning block 4 and corresponding to the guide holes 8. The guide holes 8 extend axially along the through hole, and the guide rods 9 are inserted into the guide holes 8 corresponding to them.

[0029] like Figure 1 and 3 As shown, the outer ring of the positioning block 4 is provided with two elastic arms 10 corresponding to the guide rods 9, the elastic arms 10 extend along the circumference of the positioning block 4 and one end is connected to the positioning block 4, and the guide rod 9 is provided on the end of the corresponding elastic arm 10 away from the positioning block 4. The provided elastic arms 10 can make the positioning block 4 have radial motion redundancy relative to the limit retaining ring 7, and the radial tolerance can be adjusted.

[0030] like Figure 1 As shown, the limit retaining ring 7 is provided with three first buckles 11 extending into the through hole, and the inner wall of the through hole has three bayonet holes corresponding to the first buckles 11, and the first buckles 11 are snapped into the corresponding bayonet holes. The limit retaining ring 7 and the adjuster 3 are arranged in a split type, and are connected by snapping the first buckles 11 with the bayonet holes, which not only facilitates the installation of the positioning block 4 into the through hole, but also improves the stability of the connection between the limit retaining ring 7 and the adjuster 3.

[0031] like Figure 1As shown, the middle part of the positioning block 4 has a through hole for the locking bolt 5 to pass through, the locking bolt 5 is inserted into the through hole and the rod head of the locking bolt 5 is close to the side of the positioning block 4 away from the second component, and the positioning block 4 is provided with two second buckles 12 for positioning the rod head of the locking bolt 5 on the positioning block 4. The second buckle 12 is an elastic buckle, and a plurality of second buckles 12 are evenly arranged in the circumferential direction. When installing the locking bolt 5, it is only necessary to align the rod body of the locking bolt 5 with the through hole, and then press the locking bolt 5 to make a plurality of second buckles 12 elastically give way outwards. When the locking bolt 5 is in place, the second buckle 12 is reset under the elastic action to limit the locking bolt 5.

[0032] 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 capable of achieving tolerance compensation, used for connecting a first component (1) and a second component, wherein the first component (1) is provided with a receiving groove (2), characterized in that: The fastening device comprises an adjuster (3) which is screw-rotatably engaged in the receiving groove (2), a through hole being formed in the adjuster (3), a positioning block (4) being formed in the through hole, a locking bolt (5) being positioned on the positioning block (4) and being threadedly connected to the second member, and a limiting structure for limiting the positioning block (4) in the through hole is provided on the adjuster (3); the limiting structure comprises an annular retaining edge (6) provided at one end of the through hole close to the second member and a limiting retaining ring (7) provided at one end of the through hole away from the second member, and the positioning block (4) is located between the annular retaining edge (6) and the limiting retaining ring (7).

2. The fastening device capable of achieving tolerance compensation according to claim 1, characterized in that: A guide structure is provided between the positioning block (4) and the limit retaining ring (7).

3. The fastening device capable of achieving tolerance compensation according to claim 2, characterized in that: The guide structure comprises a plurality of guide holes (8) provided on the limit retaining ring (7) and a plurality of guide rods (9) provided on the positioning block (4) and arranged one-to-one corresponding to the guide holes (8); the guide holes (8) extend axially along the through hole, and the guide rods (9) are inserted into the guide holes (8) arranged correspondingly thereto.

4. The fastening device capable of achieving tolerance compensation according to claim 3, characterized in that: The outer ring of the positioning block (4) is provided with a plurality of elastic arms (10) which are equal in number to the guide rods (9) and are arranged in one-to-one correspondence. The elastic arms (10) extend along the circumference of the positioning block (4) and one end is connected to the positioning block (4). The guide rod (9) is arranged on the end of the corresponding elastic arm (10) which is away from the positioning block (4).

5. The fastening device capable of achieving tolerance compensation according to claim 2, characterized in that: The limit retaining ring (7) is provided with a plurality of first buckles (11) extending into the through hole, the inner wall of the through hole has a plurality of bayonet holes corresponding to the first buckles (11) one by one, and the first buckles (11) are clamped in the corresponding bayonet holes.

6. The fastening device capable of achieving tolerance compensation according to claim 1, characterized in that: The middle portion of the positioning block (4) has a through hole for a locking bolt (5) to pass through, the locking bolt (5) is inserted into the through hole and the rod head of the locking bolt (5) is abutted against a side of the positioning block (4) away from the second component, and the positioning block (4) is provided with a plurality of second buckles (12) for positioning the rod head of the locking bolt (5) on the positioning block (4).

7. The fastening device capable of achieving tolerance compensation according to claim 1, characterized in that: A plurality of helically extending bosses (13) are convexly provided on the inner wall of the accommodating groove (2), a plurality of helical guide grooves (14) are provided on the outer wall of the regulator (3) and are arranged in one-to-one correspondence with the bosses (13), and the bosses (13) extend into the corresponding helical guide grooves (14).

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