A locking mechanism for connecting a body sheet metal to a ceiling

Abstract

The present invention relates to a locking mechanism for connecting a body sheet metal with a ceiling, comprising a sleeve, a bushing and a nut clamp, the nut clamp comprising an upper base plate, a lower base plate, a stud and a locking tongue, a slot for clamping the body sheet metal is formed between the upper base plate and the lower base plate, the stud is connected to the upper base plate, the sleeve is pressed into the inner hole of the sleeve, the sleeve is locked into the stud on the nut clamp, the outer thread of the sleeve and the inner thread of the stud are threadedly matched, the locking tongue is arranged on the upper surface of the lower base plate, and is used to locate the mounting hole of the body sheet metal, a gap for plugging the body sheet metal is left between the vertex of the locking tongue and the lower surface of the upper base plate, and holes for allowing bolts to enter the sleeve from the lower side of the lower base plate are provided on both the upper base plate and the lower base plate. Compared with the prior art, the present invention has the advantages of simple structure, convenient use, reliable function, and easy replacement.

Description

Technical Field

[0001] The invention relates to a connection structure, in particular to a locking mechanism used for connecting a vehicle body sheet metal with a ceiling. Background Art

[0002] Usually, the industry uses clips to fix the car roof to the mounting holes of the car body sheet metal; however, this method has low locking strength, insufficient locking force, and the roof is easy to loosen. In addition, when the operator is installing under the car roof, the clip mounting holes are blocked by the car roof. At this time, the operator needs to repeatedly adjust the position of the car roof based on his own experience and judgment to complete the installation. It has the disadvantages of being troublesome to disassemble and assemble, easy to damage, and poor durability, and cannot meet the increasingly improved quality requirements.

[0003] Chinese patent CN103590524B discloses a ceiling rotation locking mechanism, including a crossbeam, a ceiling side frame, a hand wheel, a corner turner A and a corner turner B. Corner turner B is a column B with a center hole B, and a flange B is provided at one end of column B. Corner turner A is a column A with a center hole A, and a flange A is provided at one end of column A. Corner turner B is circumferentially fixed to the end of the crossbeam, and a through hole is provided on the ceiling side frame. The threaded end of the hand wheel passes through the through hole of the ceiling side frame and the center hole A of corner turner A in turn, and then is threadedly connected with the center hole B of corner turner B. The end face of flange A of corner turner A and the end face of flange B of corner turner B form a conical surface contact fit. The ceiling angle is easy to adjust, the locking force is large, and the locking and fixing are stable. However, the above mechanism is mainly used for connecting the ceiling of a building, and is not suitable for connecting the ceiling of a vehicle body. Summary of the invention

[0004] The purpose of the present invention is to provide a locking mechanism for connecting the body sheet metal and the ceiling in order to overcome the defects of insufficient connection strength, inconvenient operation, poor durability and easy damage in the above-mentioned prior art connection method between the body sheet metal and the ceiling.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] The invention provides a locking mechanism for connecting a body sheet metal and a ceiling, which is used to realize the connection between the body sheet metal and the ceiling top plate, and comprises a shaft sleeve, a bushing and a nut clamp, wherein a through hole is provided in the middle of the shaft sleeve, an inner hole is provided in the middle of the bushing, and an outer thread is provided on the outer side, and the nut clamp comprises an upper base plate, a lower base plate, a stud and a locking tongue, wherein a clamping groove for clamping the body sheet metal is formed between the upper base plate and the lower base plate, and the stud is connected to the upper base plate, the shaft sleeve is pressed into the inner hole of the bushing, and the bushing is locked into the stud on the nut clamp, and the outer thread of the bushing and the inner thread of the stud are threadedly matched, and the locking tongue is arranged on the upper surface of the lower base plate, and is used to locate the mounting hole of the body sheet metal, and a gap for plugging the body sheet metal is reserved between the vertex of the locking tongue and the lower surface of the upper base plate, and holes for allowing the bolts to enter the shaft sleeve from the lower side of the lower base plate are provided on both the upper base plate and the lower base plate;

[0007] When in use, the locking mechanism pushes the nut clamp into the body sheet metal with the mounting hole, positions it through the lock tongue, and then locks the bolt into the shaft sleeve hole. The thread is tightly matched with the shaft sleeve, and the bolt is rotated to drive the bushing to rotate, so that the bushing moves upward and is pressed tightly against the ceiling top plate, thereby achieving the purpose of locking and installing the body sheet metal and the ceiling top plate.

[0008] In one embodiment of the present invention, the upper end of the bushing is a flange surface, and the external thread is located below the flange surface. When in use, the flange surface is pressed tightly against the ceiling top plate. The flange surface can increase the contact surface with the ceiling top plate and increase the locking force, thereby achieving the purpose of locking installation.

[0009] In one embodiment of the present invention, a rubber ring is further included. The rubber ring is a circular ring structure and is inserted into the bushing near the flange surface to prevent the bushing from vibrating and loosening.

[0010] In one embodiment of the present invention, the bushing is a metal bushing.

[0011] In one embodiment of the present invention, the bushing is a plastic bushing.

[0012] In one embodiment of the present invention, preferably, the through hole inside is a special-shaped through hole.

[0013] In one embodiment of the present invention, the nut clamp is made of metal.

[0014] In one embodiment of the present invention, the upper base plate and the lower base plate are integrally formed into a U-shaped structure with an opening in the horizontal direction, one end of the upper base plate and the lower base plate are elastically connected, and the other end of the upper base plate and the lower base plate form an opening.

[0015] In one embodiment of the present invention, the stud and the upper base plate are an integral structure formed by die stamping and stretching.

[0016] In one embodiment of the present invention, the end of the upper base plate is tilted upward by 20 to 70 degrees.

[0017] In one embodiment of the present invention, the inner hole of the bushing is a stepped inner hole.

[0018] The locking mechanism of the present invention is a multi-part assembly structure. The bushing and the nut clamp are formed by cold-rolled spring steel materials through die stamping, and then the parts are heat treated to increase the strength and rigidity of the parts. Finally, the surface treatment is performed to ensure the corrosion resistance and aesthetics.

[0019] The locking mechanism of the invention is used for connecting the automobile body sheet metal and the ceiling, and has the function of locking the automobile body sheet metal and the ceiling, and has a stable structure, is easy to produce, and is cost-effective.

[0020] The locking mechanism of the present invention has the advantages of simple structure, convenient use, reliable function, easy replacement, etc.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] (1) The locking structure of the present invention is stamped and molded, and is tightly matched with injection molding, has a simple structure, is easy to manufacture, and can be mass-produced;

[0023] (2) The locking structure of the present invention is a threaded connection structure of the bushing and the nut clamp, so it is easy to install and disassemble. If any problem is found after installation, it can be easily disassembled and replaced.

[0024] (3) The locking structure of the present invention is bolt-connected, so it is easy to install and disassemble. If any problem is found after installation, it can be easily disassembled and replaced.

[0025] (4) The external dimensions of the nut clamp can be adjusted according to the actual use environment, which increases its applicability and extensiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the exploded structure of the locking mechanism used to connect the body sheet metal and the ceiling in Example 1 of the present invention;

[0027] Figure 2 This is a schematic diagram of the assembly structure of the locking mechanism used to connect the body sheet metal and the ceiling in Example 1 of the present invention;

[0028] Figure 3 This is a schematic structural diagram of an upper bushing of a locking mechanism for connecting a body sheet metal to a ceiling in Embodiment 1 of the present invention;

[0029] Figure 4Schematic diagram of the structure of the nut clamp on the locking mechanism used to connect the body sheet metal and the ceiling in Example 1 of the present invention. DETAILED DESCRIPTION

[0030] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Example

[0032] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 The present embodiment provides a locking mechanism for connecting a body sheet metal with a ceiling, which is used to realize the connection between the body sheet metal 5 and the ceiling top plate 6, including a shaft sleeve 1, a bushing 2 and a nut clamp 4, wherein the shaft sleeve 1 is provided with a through hole in the middle, the bushing 2 is provided with an inner hole 22 in the middle, and an outer thread 23 is provided on the outer side, the nut clamp 4 includes an upper bottom plate 41, a lower bottom plate 42, a stud 43 and a locking tongue 44, a slot for clamping the body sheet metal 5 is formed between the upper bottom plate 41 and the lower bottom plate 42, and the stud 43 is connected to the upper bottom plate 41. The shaft sleeve 1 is pressed into the inner hole 22 of the bushing 2, and the bushing 2 is locked into the stud 43 on the nut clamp 4. The external thread of the bushing 2 and the internal thread of the stud 43 are threadedly matched. The locking tongue 44 is arranged on the upper surface of the lower bottom plate 42 and is used to locate the mounting hole of the body sheet metal 5. A gap is left between the vertex of the locking tongue 44 and the lower surface of the upper bottom plate 41 for plugging the body sheet metal 5. The upper bottom plate 41 and the lower bottom plate 42 are both provided with holes for the bolt 7 to enter the shaft sleeve 1 from the lower side of the lower bottom plate 42;

[0033] When in use, the locking mechanism pushes the nut clamp 4 onto the body sheet metal 5 with the mounting hole, positions it through the locking tongue 44, and then locks the bolt 7 into the hole of the sleeve 1. The bolt 7 is tightly matched with the sleeve 1 through the thread, and the bushing 2 is rotated to rotate the bushing 2, so that the bushing 2 moves upward and is pressed tightly against the ceiling top plate 6, thereby achieving the purpose of locking and installing the body sheet metal 5 and the ceiling top plate 6.

[0034] Further references Figure 3 In this embodiment, the upper end of the bushing 2 is a flange surface 21, and the external thread 23 is located below the flange surface 21. When in use, the flange surface 21 is pressed against the ceiling top plate 6. The flange surface 21 can increase the contact surface with the ceiling top plate 6 and increase the locking force, thereby achieving the purpose of locking installation. The inner hole 22 of the bushing 2 is a stepped inner hole.

[0035] Further references Figure 1 , Figure 2 In this embodiment, a rubber ring 3 is also included. The rubber ring 3 is a circular ring structure. The rubber ring 3 is inserted into the bushing 2 near the flange surface 21 to prevent the bushing 2 from vibrating and loosening.

[0036] In this embodiment, the bushing 2 is a metal bushing.

[0037] In this embodiment, the shaft sleeve 1 is a plastic shaft sleeve, and the through hole inside the shaft sleeve is a special-shaped through hole.

[0038] In this embodiment, the nut clamp 4 is made of metal.

[0039] Further references Figure 4 In this embodiment, the upper bottom plate 41 and the lower bottom plate 42 are integrally formed into a U-shaped structure with an opening in the horizontal direction. One end of the upper bottom plate 41 and the lower bottom plate 42 are elastically connected, and the other end of the upper bottom plate 41 and the lower bottom plate 42 form an opening. The stud 43 and the upper bottom plate 41 are integrally formed by die stamping and stretching. The end of the upper bottom plate 41 is tilted upward by 20 to 70 degrees.

[0040] The locking mechanism of this embodiment is a multi-part assembly structure. The bushing and nut clamp are made of cold-rolled spring steel material through mold stamping, and then the parts are heat treated to increase the strength and rigidity of the parts. Finally, surface treatment (Dacromet) is performed to ensure corrosion resistance and aesthetics.

[0041] The locking mechanism of this embodiment is used to connect the automobile body sheet metal and the ceiling, and has the function of locking the automobile body sheet metal and the ceiling. It has a stable structure, is easy to produce, and is cost-effective.

[0042] The locking mechanism of this embodiment has the advantages of simple structure, convenient use, reliable function, and easy replacement.

[0043] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A locking mechanism for connecting a body sheet metal to a ceiling, used to achieve connection between a body sheet metal (5) and a ceiling top plate (6), It is characterized in that It comprises a shaft sleeve (1), a bushing (2) and a nut clamp (4). The shaft sleeve (1) has a through hole in the middle, the bushing (2) has an inner hole (22) in the middle and an outer thread (23) on the outside. The nut clamp (4) comprises an upper base plate (41), a lower base plate (42), a stud (43) and a locking tongue (44); a slot for clamping the vehicle body sheet metal (5) is formed between the upper base plate (41) and the lower base plate (42); the stud (43) is connected to the upper base plate (41); the shaft sleeve (1) is pressed into the inner hole (22) of the bushing (2); the bushing (2) is locked into the stud (43) on the nut clamp (4); the external thread of the bushing (2) and the internal thread of the stud (43) are threadedly matched; The locking tongue (44) is arranged on the upper surface of the lower base plate (42) and is used to locate the mounting hole of the body sheet metal (5). A gap is left between the vertex of the locking tongue (44) and the lower surface of the upper base plate (41) for plugging the body sheet metal (5). The upper base plate (41) and the lower base plate (42) are both provided with holes for allowing the bolts (7) to enter the shaft sleeve (1) from the lower side of the lower base plate (42); When in use, the locking mechanism pushes the nut clamp (4) onto the body sheet metal (5) with the mounting hole, positions it by means of the locking tongue (44), and then locks the bolt (7) into the hole of the shaft sleeve (1). The bolt (7) is rotated to drive the bushing (2) to rotate, so that the bushing (2) moves upward and is pressed against the ceiling top plate (6), thereby achieving the purpose of locking and mounting the body sheet metal (5) and the ceiling top plate (6); The bushing (2) is a metal bushing; the inner hole (22) of the bushing (2) is a stepped inner hole.

2. A locking mechanism for connecting a body sheet metal to a ceiling according to claim 1, It is characterized in that The upper end of the bushing (2) is a flange surface (21), and the external thread (23) is located below the flange surface (21). When in use, the flange surface (21) is pressed tightly against the ceiling top plate (6).

3. A locking mechanism for connecting a body sheet metal to a ceiling according to claim 2, It is characterized in that It also includes a rubber ring (3) which is a circular ring structure. The rubber ring (3) is inserted into the bushing (2) near the flange surface (21) to prevent the bushing (2) from loosening due to vibration.

4. A locking mechanism for connecting a body sheet metal to a ceiling according to claim 1, It is characterized in that The shaft sleeve (1) is a plastic shaft sleeve.

5. A locking mechanism for connecting a body sheet metal to a ceiling according to claim 1, It is characterized in that The nut clamp (4) is made of metal.

6. A locking mechanism for connecting a body sheet metal to a ceiling according to claim 1, It is characterized in that The upper base plate (41) and the lower base plate (42) are integrally formed U-shaped structures with an opening in the horizontal direction; one end of the upper base plate (41) and the lower base plate (42) are elastically connected, and the other end of the upper base plate (41) and the lower base plate (42) form an opening.

7. A locking mechanism for connecting a body sheet metal to a ceiling according to claim 1, It is characterized in that The stud (43) and the upper base plate (41) are an integrated structure formed by die stamping and stretching.

8. A locking mechanism for connecting a body sheet metal to a ceiling according to claim 1, It is characterized in that The end of the upper base plate (41) is tilted upward by 20 to 70 degrees.

Images