Clearance compensation nut

Abstract

The utility model relates to a clearance compensation nut which comprises a clearance compensation part and a second connecting part which are connected, the top of the clearance compensation part is provided with a first connecting part connected with a first component, and the second connecting part is connected with a second component. A metal nut is limited in the nut mounting groove, and the first connecting part, the second connecting part and the clearance compensation part are each provided with a through hole coaxial with the metal nut. According to the utility model, the nut mounting groove is formed below the clearance compensation part, so that the metal nut is effectively fixed in the body of the plastic part, and an operator can tighten the clearance compensation nut without holding the metal nut by hand in a limited construction space. And meanwhile, the fastener adopts a metal nut, so that the damage torque meets the technical requirements of customers.

Description

Technical Field

[0001] The utility model belongs to the technical field of gap compensation nuts, in particular to an adjustable gap compensation nut. Background Art

[0002] In the automotive field, due to production tolerances in the connection between the car body and internal components, after the parts are positioned, the gaps between the two components related to the connection point are not completely consistent. If the two are forcibly tightened with bolts, the position of the components on the vehicle will be affected, thereby adversely affecting the appearance of the gap and flushness.

[0003] In the prior art, a gap compensating nut is used to connect a first component and a second component that have a gap between them. A conventional gap compensating nut typically includes a first connecting portion that connects to the first component, a second connecting portion that connects to the second component, and a gap compensating portion for compensating the gap between the first and second components. During use, a fastening bolt is passed through the first and second connecting portions from one side of the first component and then tightened with a nut on the opposite side of the second component. As the fastening bolt is tightened, the gap compensating portion compensates for the gap between the first and second components.

[0004] Due to installation space limitations, it is difficult to tighten the bolt by holding the nut at one end. Therefore, common gap compensation nuts on the market have internal threads directly below the second connection part to replace the nut (such as patents CN115342113A and CN114072588A). However, the breaking torque of this plastic internal thread is significantly weaker than that of metal bolt connections, resulting in an inability to meet the high breaking torque technical requirements of some automakers. Thread damage is likely to occur during the installation of gap compensation nuts at certain key positions, affecting the qualified product rate and assembly efficiency. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a gap compensation nut, which ensures that its breaking torque meets the technical requirements of customers, and during installation, there is no need to hold the nut at one end by hand, and only the bolt needs to be tightened.

[0006] The technical solution adopted by the utility model to solve its technical problems is: to provide a gap compensation nut, including a connected gap compensation part and a second connecting part, the top of the gap compensation part is provided with a first connecting part connected to the first component, the second connecting part is connected to the second component, a nut mounting groove is provided below the gap compensation part, a metal nut is limited in the nut mounting groove, and the first connecting part, the second connecting part and the gap compensation part are all provided with a through hole coaxial with the metal nut.

[0007] Preferably, the second connecting portion is arranged at the bottom of the gap compensation portion, and includes an elastic plastic elastic clip with elasticity. The plastic elastic clip includes an upper plate and a lower plate. The upper plate is connected to one end of the lower plate, and the nut mounting groove is arranged at the lower part of the lower plate.

[0008] Preferably, the second connecting portion is provided at the bottom of the gap compensation portion, and comprises a lap surface abutting against the upper surface of the second component and buckles provided on both sides below the lap surface.

[0009] Preferably, the second connecting portion includes a plurality of screw buckles provided on the periphery of the gap compensation portion.

[0010] Preferably, the metal nut is fixed in the nut mounting groove by an insert injection molding process.

[0011] Preferably, the gap compensation part includes a base and a compensation bolt, the center of the base is provided with an internal thread, the compensation bolt is provided with an external thread matching the center of the base, the rotation direction of the compensation bolt is opposite to that of the metal nut, the through hole is opened at the center of the compensation bolt, and an inwardly protruding friction part is provided on the inner circumference of the through hole.

[0012] Preferably, the nut mounting groove includes a bottom and at least two side walls, and the distance between the two side walls matches the distance between opposite sides of the metal nut.

[0013] Preferably, the upper portion of the friction member is provided with an outwardly extending extension arm, the lower portion of the extension arm is provided with a convex point, the top of the base is provided with a plurality of protruding card points, and the convex point is located between the two card points when the compensation bolt is screwed to the bottom of the base.

[0014] The present invention provides a beneficial effect: by providing a nut mounting slot below the gap compensation portion, the metal nut is effectively secured within the plastic body. This allows operators to tighten the gap compensation nut without manually holding the nut, even in limited working space. Furthermore, because the fastener is a metal nut, its breaking torque is guaranteed to meet customer specifications. Using plastic for other components significantly reduces costs, reduces weight, prevents scratches on metal surface paint, and improves NVH and rust prevention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional diagram of a gap compensation nut.

[0016] Figure 2 This is a cross-sectional view of a gap compensation nut.

[0017] Figure 3 This is a schematic diagram of the installation of a gap compensation nut.

[0018] Figure 4This is a stereoscopic view of a second embodiment of a gap compensation nut.

[0019] Figure 5 This is a three-dimensional diagram of a third embodiment of a gap compensation nut.

[0020] Figure 6 This is a cross-sectional view of a fourth embodiment of a gap compensating nut.

[0021] Among them, 1-first connecting part; 101-gasket; 2-gap compensation part; 201-top surface; 202-extension arm; 203-bump; 204-compensation bolt; 205-base; 206-through hole; 207-friction part; 208-protrusion; 3-second connecting part; 301-upper plate; 302-lower plate; 4-nut mounting groove; 401-metal nut; 5-fastening bolt; 6-first component; 7-second component; 8-clip; 9-screw.

[0022] The same reference numerals in the various drawings represent the same components. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the contents of this invention, those skilled in the art may make various changes or modifications to the present invention, and that such equivalents also fall within the scope of the claims appended hereto.

[0024] like Figure 1 、 2 As shown, the utility model provides a gap compensation nut, including a connected gap compensation part 2 and a second connection part 3, the top of the gap compensation part 2 is provided with a first connection part 1 connected to the first component 6, the second connection part 3 is connected to the second component 7, and a nut mounting groove 4 is provided below the gap compensation part 2, a metal nut 401 is limited in the nut mounting groove 4, and the first connection part 1, the second connection part 3, and the gap compensation part 2 are all provided with a through hole 206 coaxial with the metal nut 401.

[0025] In a specific embodiment, the plastic elastic clip is a plastic elastic clip that can be integrally formed with the first connecting portion 1 and the base 205 of the gap compensation portion 2. The entire clip is made of a plastic material such as PA66, which helps reduce costs, reduces weight, and eliminates the risk of rust. The second connecting portion 3 includes a resilient plastic elastic clip. The plastic elastic clip includes an upper plate 301 and a lower plate 302. The upper plate 301 is connected to one end of the lower plate 302, and the spacing between the open ends is smaller than the spacing between the connected ends and the thickness of the second component 7. When in use, the second component 7 is embedded between the upper plate 301 and the lower plate 302 to achieve a fixed connection with the second component 7. The nut mounting slot 4 is provided at the lower portion of the lower plate 302.

[0026] like Figure 4 In another embodiment shown, the second connecting portion 3 is provided at the bottom of the gap compensating portion 2 and includes an overlapping surface that abuts against the upper surface of the second component and buckles 8 provided on both sides below the overlapping surface. The buckles 8 are male buckles that, when in use, mate with buckle grooves defined on the surface of the second component. Inserting the buckle 8 into the buckle grooves securely connects the gap compensating portion to the second component 7.

[0027] like Figure 5 In another embodiment shown, the second connecting portion 3 includes a plurality of knobs 9 disposed on the outer periphery of the gap compensating portion 2. The knobs 9 mate with knob grooves formed on the surface of the second component during use. After insertion into the knob grooves, the gap compensating portion 2 can be connected to the second component by rotating it approximately 90°.

[0028] The gap compensation part 2 includes a base 205 and a compensation bolt 204. The base 205 is arranged above the second connecting part 3. The center of the base 205 is provided with an internal thread. The compensation bolt 204 is provided with an external thread matching the center of the base 205. The rotation direction of the compensation bolt 204 is opposite to that of the metal nut 401. The through hole 206 is opened at the center of the compensation bolt 204. The inner circumference of the through hole 206 is provided with a friction part 207 protruding inward.

[0029] In one specific embodiment, the friction member 207 and the compensation bolt 204 are integrally formed by two-color injection molding. An inwardly circumferential protrusion 208 is provided at the bottom of the friction member 207. The inner diameter of the protrusion 208 is smaller than the outer diameter of the thread of the fastening bolt 5 mating with the metal nut 401, ensuring that it provides sufficient friction after the fastening bolt 5 is inserted. A gap is left between the outer circumference of the friction member 207 and the inner circumference of the through-hole 206 and the fastening bolt 5, and the protrusion 208 forms an interference fit with the fastening bolt 5.

[0030] like Figure 2 、 3In the specific embodiments shown in Figures 4 and 5, the nut mounting slot 4 includes a bottom and at least two side walls. The spacing between the two side walls matches the distance between opposite sides of the metal nut 401. The metal nut 401 is clamped by the two side walls so that it cannot rotate within the nut mounting slot 4. In a specific embodiment, the metal nut 4 is a square nut. The nut mounting slot 4 is further provided with a rear baffle connected to the two side walls. After the metal nut 401 is pushed to the bottom and abuts against the rear baffle, it is ensured that the metal nut 401 is coaxial with the first connecting portion 1, the gap compensation portion 2, the through hole 206 of the second connecting portion 3, and the fastening bolt 5.

[0031] like Figure 6 In another embodiment shown, the metal nut 401 is fixed within the nut mounting slot 4 via insert molding. Insert molding can completely enclose the metal nut 401 within the nut mounting slot 4. In situations where the metal nut 401 does not need to be replaced, insert molding can improve assembly efficiency and ensure that the metal nut 401 is installed coaxially with the through-hole 206 through mold design.

[0032] An outwardly extending extension arm 202 is provided on the upper portion of the friction member 207, a protrusion 203 is provided on the lower portion of the extension arm 202, and a plurality of protruding card points are provided on the top of the base 205. When the compensation bolt 204 is screwed to the bottom of the base 205, the protrusion 203 is located between the two card points, thereby ensuring that the compensation bolt 204 will not spin out due to vibration during transportation of the unassembled parts, thereby preventing it from falling off the base 205.

[0033] like Figure 3 As shown, for example, the first component 6 is a body sheet metal component, and the second component 7 is a mounting bracket for applications such as headlights and bumpers. When in use, the second connecting part 3 is generally first connected to the second component 7 by clamping at the component factory; then it is transported to the main engine factory to ensure that the second component 7 is configured in place with the first component 6 to be connected. The main engine factory prepares a fastening bolt 5 that matches the metal nut 401 and inserts it into the through hole 206 from the top of the first component 6 downward until the lower end of the fastening bolt 5 contacts the friction part 207; the fastening bolt 5 is continued to be screwed downward into the metal nut 401, and at the same time, the fastening bolt 5 drives the friction part 207 to rotate. When the friction part 207 rotates, it drives the compensation bolt 204 to rotate, and the external thread of the compensation bolt 204 cooperates with the internal thread of the base 205 to make the compensation bolt 204 screwed out in the opposite direction relative to the fastening bolt 5 until the top surface 201 of the top of the compensation bolt 204 contacts the bottom surface of the first component 6 and the gasket 101 outside the fastening bolt 5 contacts the upper surface of the first component 6, indicating that the fastening bolt 5 has been tightened.

Claims

1. A gap compensation nut, comprising a gap compensation portion and a second connection portion connected to each other, wherein the top of the gap compensation portion is provided with a first connection portion connected to the first component, and the second connection portion is connected to the second component, characterized in that: A nut mounting groove is provided below the gap compensation portion, a metal nut is limited in the nut mounting groove, and the first connecting portion, the second connecting portion and the gap compensation portion are all provided with a through hole coaxial with the metal nut.

2. A clearance compensating nut according to claim 1, characterized in that: The second connecting portion is arranged at the bottom of the gap compensation portion, and includes an elastic plastic elastic clip with elasticity. The plastic elastic clip includes an upper plate and a lower plate. The upper plate is connected to one end of the lower plate, and the nut mounting groove is arranged at the lower part of the lower plate.

3. The gap compensation nut according to claim 1, characterized in that: The second connecting portion is arranged at the bottom of the gap compensation portion, and includes a lap joint surface abutting against the upper surface of the second component and buckles arranged on both sides below the lap joint surface.

4. The clearance compensating nut according to claim 1, characterized in that: The metal nut is fixed in the nut mounting groove through an insert injection molding process.

5. The clearance compensating nut according to claim 1, characterized in that: The second connecting portion includes a plurality of screw buckles arranged on the outer periphery of the gap compensation portion.

6. The clearance compensating nut according to claim 1, characterized in that: The gap compensation part includes a base and a compensation bolt. The center of the base is provided with an internal thread, and the compensation bolt is provided with an external thread matching the center of the base. The rotation direction of the compensation bolt is opposite to that of the metal nut. The through hole is opened at the center of the compensation bolt, and an inwardly protruding friction part is provided on the inner circumference of the through hole.

7. The clearance compensating nut according to claim 2, characterized in that: The nut mounting groove includes a bottom and at least two side walls, and the distance between the two side walls matches the distance between opposite sides of the metal nut.

8. The gap compensating nut according to claim 3, characterized in that: An outwardly extending extension arm is provided on the upper portion of the friction member, a convex point is provided on the lower portion of the extension arm, and a plurality of protruding clamping points are provided on the top of the base. When the compensation bolt is screwed to the bottom of the base, the convex point is located between the two clamping points.

Images