CN204082799U - Workpiece connecting device and mounting assembly - Google Patents

Abstract

The utility model relates to a connecting device for assembling at least two workpieces together, the connecting device connects the workpieces together through regions in the form of through holes of the at least two workpieces; wherein, the The connecting device comprises a connecting piece and a hollow positioning element, which has an outer edge protrusion corresponding to the cross-section of a fitting area in the form of a through hole of at least one of the at least two workpieces, The support part connected with the edge protrusion, the support part radially surrounds and fixes the connecting piece through interference fit, and the outer edge protrusion is clamped and accommodated in the groove in the assembly area. The utility model also relates to a mounting assembly comprising such a connecting device. The connecting device according to the utility model is easy to assemble and disassemble and can be used repeatedly.

Description

Workpiece connection device and mounting components

technical field

The utility model relates to the field of mechanical connection, in particular to a connection device for assembling at least two workpieces and a mounting assembly comprising the connection device.

Background technique

At present, when a large number of bolts are used for connection and assembly, especially when assembly is performed on an assembly line, the connection parts (for example, bolts) are usually preset at the assembly position to save assembly time. However, the pre-assembled connectors may come off during transportation and assembly, thereby delaying the assembly process. Especially for the occasions where the connecting parts are installed overhead from bottom to top, it is difficult to ensure that the connecting parts remain in the pre-installed position. In addition, the threaded portion of the pre-installed connector is exposed and easily damaged by collision during transportation, thereby affecting the efficiency and cost of assembly. In addition, when there are more than one mounting holes on the connected parts, there will be errors due to machining accuracy, that is, the bolts will produce radial displacement during installation. In this case, the connecting device should meet the corresponding assembly tolerances Require. Further, when the connected device needs to be repeatedly disassembled and assembled, the connecting device should meet the requirements of easy disassembly, assembly and reusability.

Patent document CN200810029192.3 discloses a screw counterbore structure on a plastic part with a stopper. Through the counterbore structure, the screw can be pre-positioned in the plastic part in a detachable manner, thereby facilitating the combination of the screw and the plastic part to be installed on the furniture from bottom to top. Patent document CN201220300383.0 discloses a bolt pre-installation combination mechanism that securely assembles bolts together through locks and structures in the plastic body. However, since the plastic part and the screw pre-assembled combined structure are not fixed in the assembly position in the pre-installed state, and the installation process does not involve tolerance requirements, it cannot meet the pre-positioning requirements of the connecting parts .

In the patent document CN201210310779.8, a reusable shrapnel structure for the installation of automobile sunroofs is introduced. The elastic sheet structure is composed of a first elastic sheet and a second elastic sheet. The first elastic piece is composed of a sheet-shaped ring and a plurality of cards extending inward along the inner hole of the ring. The second elastic piece includes a cylindrical upper part and a plurality of pull hooks protruding downward from the cylindrical upper part. Wherein, an annular locking groove may be provided on the cylindrical upper part to hold the card during disassembly so as to prevent the first elastic piece from loosening. The problem to be solved by this technology is to disassemble the bolt conveniently without destroying the first shrapnel, instead of ensuring that the bolt remains in the pre-installed position. In addition, it cannot protect the thread and compensate for tolerances.

In the patent document DE102009039508, a kind of centering clamp is disclosed The installation structure of the housing in the car. In the preassembled state, the screw can be fastened in the mounting structure by means of the centering clip. However, it cannot solve the problem of ensuring that the thread of the bolt is not damaged during transportation in the pre-installed state and cannot meet the requirements of maximum tolerance compensation.

Utility model content

In order to overcome the defects in the prior art, the utility model provides a connection device that is convenient for installation and meets the following conditions:

In the pre-installed state, the connecting piece can be fixed on the pre-installed workpiece in a non-fall-off manner;

The pre-positioned connectors will not be damaged during transportation;

The connection structure can meet the compensation for the design tolerance during the installation process;

The positioning elements of the connecting device do not need to be taken out during the assembly process;

The connection device is easy to disassemble and can be reused;

And a mounting assembly connected together by the connecting device.

The utility model relates to the following technical solution: a connecting device for assembling at least two workpieces, the connecting device connects the workpieces together through a region of the at least two workpieces that is substantially in the form of a through hole ; wherein the connecting device includes a connecting piece and a hollow positioning element, the positioning element has an outer edge protrusion of a shape corresponding to the cross-section of the assembly area in the form of a through hole of at least one of the at least two workpieces, and a support portion connected to the outer edge protrusion, the support portion radially surrounds and fixes the connecting piece by interference fit, and the outer edge protrusion is clamped and accommodated in the groove in the assembly area . The connecting device according to the present invention is predetermined to be located in an assembly area in the form of a through hole on a workpiece to be connected, and includes a connecting piece and a hollow positioning element. The connecting piece can be a bolt, for example, and the bolt includes a threaded part and a shank, wherein the radius of the threaded part is larger than the radius of the shank; The supporting part connected with the edge protrusion, wherein, in the pre-assembled and assembled state, the outer edge protrusion is accommodated in a groove in the assembly area, and in the pre-assembled state, the The supporting portion of the positioning element forms a radial surrounding of the externally threaded connecting piece and forms an interference fit with its threaded portion, so that the bolt can be pre-positioned in the assembly area in a non-falling-off manner.

According to the positioning element of the present invention, it can be made of plastic, and its supporting part can be implemented as an approximate semi-uniform hyperboloid shape or a plurality of teeth extending inwardly along the opening of the outer edge protrusion of the positioning element. structure.

The connecting device according to the present invention may also comprise a sleeve for receiving the connecting piece and the positioning element. A sleeve, preferably made of metal, is mounted in said assembly area. Wherein, a groove is formed on the inner wall of the sleeve for accommodating the outer edge protrusion of the positioning element. Also, the height of the sleeve is greater than the height of the threaded portion of the bolt. Through the cooperation of the sleeve and the positioning element, the threaded part of the pre-positioned bolt can be completely placed in the sleeve, thereby protecting the threaded part from being damaged by collision during transportation.

According to the connection device of the present invention, in the assembled state, the wall thickness of the support part of the positioning element is smaller than the radius difference between the threaded part and the shank part of the connecting piece. And, can according to the connecting device of the present utility model can be designed like this, that is, after assembly is completed, the support portion of described locating element does not contact with the threaded portion of described bolt, so just can guarantee that locating element can not be connected The radial obstruction is produced by the parts, so as to meet the compensation for the assembly design tolerance of the connecting parts.

In addition, the utility model also relates to an installation assembly connected together by the above-mentioned connecting device, including at least two workpieces and a connecting device for assembling the at least two workpieces, wherein the connecting device includes a connecting piece and A hollow positioning element, wherein the connecting device connects the at least two workpieces together through an assembly area in the form of a through hole on the workpiece; and, the positioning element has an outer edge corresponding to the cross-section of the assembly area a protruding part, and a supporting part connected with the protruding part of the outer edge, wherein the supporting part of the positioning element radially surrounds and fixes the connecting part by interference fit, and wherein the protruding part of the outer edge The parts are snap-fitted into recesses in the mounting area.

Description of drawings

Fig. 1 is the structure according to the connection device of the first embodiment of the present utility model;

Fig. 2 is according to the structure of the sleeve of the utility model;

Fig. 3 is the structure according to the positioning element of the present utility model;

Fig. 4 is the pre-installation structure of the installation assembly according to the first embodiment of the present utility model;

Fig. 5 is the assembly structure of the connecting device according to the first embodiment of the present invention when the maximum design tolerance occurs;

Fig. 6 is the structure according to the connecting device of the second embodiment of the present utility model;

Fig. 7 is the assembly structure of the connecting device according to the second embodiment of the present invention when the maximum design tolerance occurs; and

Fig. 8 is a pre-installation structure of the installation assembly according to the third embodiment of the present invention.

detailed description

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Among them, FIG. 1 shows the structure of the connecting device according to the first embodiment of the present utility model. Fig. 2 shows the structure of the sleeve according to the first and second embodiments of the present invention. FIG. 3 shows two different embodiments of the positioning element according to the invention. Fig. 4 shows the pre-assembled structure of the mounting assembly according to the first embodiment of the present invention. FIG. 5 shows the assembly structure of the connecting device according to the first embodiment of the present invention when the maximum design tolerance occurs. FIG. 6 shows the structure of the connecting device according to the second embodiment of the present invention. FIG. 7 shows the assembly structure of the connection device according to the second embodiment of the present invention when the maximum design tolerance occurs. Fig. 8 shows the pre-installation structure of the installation assembly according to the third embodiment of the present invention.

Example 1

FIG. 1 shows the connecting device in this embodiment. Wherein, the connecting device includes a connecting piece 1 , a positioning element 2 and a sleeve 8 . The connection device 100 connects the workpieces 200, 300 together through at least two workpieces 200, 300 in the form of substantially through holes; wherein the connection device includes a connecting piece 1 and a hollow positioning element 2, the positioning The element 2 has an outer edge protrusion 3 of a shape corresponding to the cross-section of the mounting area 30 in the form of a through hole of at least one of the at least two workpieces 200, 300, and an outer edge protrusion 3 connected to the outer edge protrusion 3 The support part 4 radially surrounds and fixes the connecting piece 1 by interference fit, and the outer edge protrusion 3 is clamped and accommodated in the groove 5 in the assembly area 30 . Figure 2 and Figure 3-1 show the structures of the sleeve 8 and the positioning element 2 respectively. Wherein, the sleeve 8 has a groove 5 on its inner wall and has an opening 40, 50 at two ends respectively. An outer edge protrusion 10 is provided outside the opening 40 , and an external thread 11 is provided near the outer edge protrusion 10 . The positioning element 2 is composed of an annular outer edge projection 3 and a supporting portion 4 connected thereto. Wherein, the outline of the outer edge protrusion 3 corresponds to the cross-section of the sleeve 8 , so as to be engaged in the groove 5 . The support portion 4 is approximately semi-unilobate hyperboloid or frusto-conical.

FIG. 4 shows a mounting assembly according to the first embodiment, including: a connecting piece 1 , a sleeve 8 , a positioning element 2 with an outer edge raised portion 3 and a supporting portion 4 , and connected pieces 200 , 300 . Wherein, the connecting piece 1 is preferably a bolt, and has a shank 70 without threads and a threaded portion 80 with threads, and the radius of the threaded portion 80 is larger than the radius of the shank 70 .

In the pre-assembled and assembled state, the outer edge protrusion 3 of the positioning element 2 is accommodated in a groove 5 on the inner wall of the sleeve 8 in a connected part 200, so that the positioning element 2 It is fixed in the sleeve 8.

The radius of the opening 6 of the protrusion on the outer edge of the positioning element 2 is greater than the radius of the threaded portion 80 of the externally threaded connector 1 . In the pre-installed state, the opening of the supporting part 4 away from the outer edge protrusion 3 forms a radial surround on the threaded part 80 of the connecting part 1, and forms an interference fit with the connecting part 1 Secured in the sleeve 8 in a detachment-proof manner.

The sleeve 8 is preferably made of metal, and can be fixed in the connected part 200 through the external thread portion 11 . The outer edge protrusion 10 cooperates with the connecting piece 1 to fix the connected pieces 200, 300 together.

The height of the sleeve 8 is greater than the height of the threaded portion 80 of the connector 1 and smaller than the sum of the heights of the handle 70 and the threaded portion 80 of the connector 1 . Moreover, the inner diameter of the sleeve 8 is larger than the diameter of the threaded portion 80 of the connecting piece 1 and smaller than the diameter of the circumscribed circle of the outer edge protrusion 3 of the positioning element 2 . Through the cooperation of the sleeve 8 and the positioning element 2, the threaded portion 80 of the pre-positioned connecting piece 1 can be completely placed in the sleeve 5, thereby protecting the threaded portion 80 from being damaged due to collision during transportation.

As shown in Figure 5, when the connection device according to the first embodiment of the present invention has the maximum design tolerance, that is, when the threaded part 80 of the connection part 1 is abutting against the inner wall 9 of the sleeve 8, the The supporting portion 4 of the positioning element 2 is closely attached to the handle portion 70 of the connecting piece 1 , and is not in contact with the threaded portion 80 of the connecting piece 1 . Since the wall thickness of the support portion 4 of the positioning element 2 is not greater than the radius difference between the threaded portion 80 and the handle portion 70, the support portion 4 will not generate radial force on the connecting piece 1, Tolerance compensation can thus be achieved.

During the dismounting process, because the positioning element 2 has good elasticity and plasticity, the connecting piece 1 and/or the positioning element 2 can be easily taken out by applying a certain external force, and also can be removed during the reinstallation process. The positioning element 2 does not need to be replaced.

Example 2

As shown in FIG. 6 and FIG. 3-2 , the difference between this embodiment and embodiment 1 is that the support portion 4 of the positioning element 2 is implemented here as an opening 6 along the outer edge protrusion 3 of the positioning element 2 A plurality of tooth-shaped structures 7 extending inward. Wherein, the outer edge protrusion 3 of the sheet-shaped positioning element 2 is accommodated in the groove 5 on the inner wall 9 of the sleeve. The positioning element 2 is thereby fixed in the sleeve 8 . Moreover, in the pre-installed state, the toothed structure 7 radially surrounds the threaded portion 80 of the connecting piece 1 and secures the connecting piece 1 on the sleeve 8 by forming an interference fit with it. middle.

The height of the sleeve 8 is greater than the height of the threaded portion 80 of the connector 1 and smaller than the sum of the heights of the handle 70 and the threaded portion 80 of the connector 1 . Moreover, the inner diameter of the sleeve 8 is larger than the diameter of the threaded portion 80 of the connecting piece 1 and smaller than the diameter of the circumscribed circle of the outer edge protrusion 3 of the positioning element 2 . Through the cooperation of the sleeve 8 and the positioning element 2, the threaded portion 80 of the pre-positioned connecting piece 1 can be completely placed in the sleeve 5, thereby protecting the threaded portion 80 from being damaged due to collision during transportation.

As shown in Figure 7, according to the connection device of the second embodiment of the present invention, when the maximum design tolerance occurs, that is, when the threaded part 80 of the connection part 1 is abutting against the inner wall 9 of the sleeve 8, the A part of the toothed structure 7 of the positioning element 2 is closely attached to the handle 70 of the connecting piece 1 , and does not contact the threaded portion 80 of the connecting piece 1 . Since the wall thickness of the support portion 4 of the positioning element 2 is not greater than the radius difference between the threaded portion 80 and the handle portion 70, the support portion 4 will not generate radial force on the connecting piece 1, Tolerance compensation can thus be achieved.

During the dismounting process, because the positioning element 2 has good elasticity and plasticity, the connecting piece 1 and/or the positioning element 2 can be easily taken out by applying a certain external force, and also can be removed during the reinstallation process. The positioning element 2 does not need to be replaced.

Example 3

As shown in FIG. 8 , compared with the previous two embodiments, the difference of the installation assembly 400 in this embodiment is that there is no sleeve 8 . There is a groove 5 on the inner wall of the fitting area 30 forming a through hole in the connected part 200 . The outer edge protrusion 3 of the positioning element 2 is accommodated in the groove 5 . Thus, the positioning element 2 is fixed in the fitting area 30 of the above-mentioned connected part 200 . Moreover, the height of the assembly area 30 is greater than the height of the threaded portion 80 of the connector 1 and smaller than the sum of the heights of the handle 70 and the threaded portion 80 of the connector 1 . In the pre-installed state, the supporting part 4 of the positioning element 2 forms a radial surround on the threaded part 80 of the connecting part 1, and by forming an interference fit with it, the connecting part 1 is fixed in the assembly area in a detachable manner 30 in.

When the maximum design tolerance occurs, that is, when the threaded part 80 of the connecting part 1 abuts against the inner wall of the assembly area 30, a part of the support part 4 of the positioning element 2 is in close contact with the shank of the connecting part 1 part 70, and not in contact with the threaded part 80 of the connector 1. Since the wall thickness of the support portion 4 of the positioning element 2 is not greater than the radius difference between the threaded portion 80 and the handle portion 70, the support portion 4 will not generate radial force on the connecting piece 1, Tolerance compensation can thus be achieved.

During the dismounting process, because the positioning element 2 has good elasticity and plasticity, the connecting piece 1 and/or the positioning element 2 can be easily taken out by applying a certain external force, and also can be removed during the reinstallation process. The positioning element 2 does not need to be replaced.

The above is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto, and any person familiar with the technical field can easily think of it within the technical scope disclosed by the utility model Changes or replacements should fall within the protection scope of the present utility model.

Notes on drawings:

1. Connector

2. Positioning components

3. The raised part of the outer edge of the positioning element

4. The supporting part of the positioning element

5. Groove

6. The opening of the raised portion of the outer edge of the positioning element

7. Tooth structure

8. Sleeve

9. The inner wall of the sleeve

10. The raised part of the outer edge of the sleeve

11. The thread structure of the sleeve

30. Assembly area

40. The opening of the sleeve

50. The opening of the sleeve

70. The handle of the connector

80. The threaded part of the connecting piece

100. Connection device

200. Connected workpiece

300. Connected workpieces

Claims (22)

1. A connecting device (100) for assembling at least two workpieces (200, 300) together, the connecting device (100) passing through substantially through holes in the at least two workpieces (200, 300) The area of the workpiece (200, 300) is connected together; it is characterized in that, the connecting device includes a connecting piece (1) and a hollow positioning element (2), and the positioning element (2) has the same structure as the at least two Outer edge protrusions (3) of corresponding shapes to the cross-section of at least one assembly area (30) in the form of a through hole of the workpieces (200, 300), and the outer edge protrusions (3) connected to the outer edge protrusions (3) The support part (4), which radially surrounds and fixes the connecting piece (1) by interference fit, and the outer edge protrusion (3) is clamped and accommodated in the assembly area (30) in the groove (5). 2. The connecting device (100) according to claim 1, characterized in that, the connecting piece (1) has an external threaded portion (80) and a handle (70), wherein the external threaded portion (80) The diameter is greater than the diameter of the shank (70); and the wall thickness of the support portion (4) of the positioning element (2) is less than or equal to the external thread portion (80) and the shank (70) radius difference. 3. The connection device (100) according to claim 1 or 2, characterized in that, the support portion (4) of the positioning element (2) is approximately semi-unilobate hyperboloid. 4. The connecting device (100) according to claim 1 or 2, characterized in that, the support portion (4) of the positioning element (2) is an opening (6) along the outer edge protrusion (3) ) a plurality of tooth-shaped structures (7) extending inward. 5. The connection device (100) according to claim 1, characterized in that, the connection device (100) further comprises a sleeve (8) for accommodating the connection piece (1) and the positioning element (2) , wherein the sleeve (8) is a substantially tubular structure open at both ends and has two openings (40, 50). 6. The connection device (100) according to claim 2, characterized in that, the connection device (100) further comprises a sleeve (8) for accommodating the connection piece (1) and the positioning element (2) , wherein the sleeve (8) is a substantially tubular structure open at both ends and has two openings (40, 50). 7. The connecting device (100) according to claim 6, characterized in that the groove (5) is located on the inner wall (9) of the sleeve (8). 8. The connection device (100) according to claim 6, characterized in that, the axial height of the sleeve (8) is greater than the length of the external thread portion (80) and smaller than the length of the external thread portion (80) and the overall length of the shank (70). 9. The connection device (100) according to claim 8, characterized in that the outer end of an opening (40, 50) of the sleeve (8) has a peripheral projection (10). 10. The connecting device (100) according to claim 9, characterized in that, there is a threaded structure (11 ). 11. The connection device (100) according to any one of claims 6 to 10, characterized in that the sleeve (8) is made of metal material. 12. An installation assembly (400) comprising at least two workpieces (200, 300) and a connecting device (100) for assembling the at least two workpieces (200, 300) together, characterized in that the The connecting device (100) comprises a connecting piece (1) and a hollow positioning element (2), wherein the connecting device (100) connects the at least two The workpieces (200, 300) are connected together; and, the positioning element (2) has an outer edge protrusion (3) having a shape corresponding to the cross-section of the assembly area, and the outer edge protrusion (3) ) connected supporting part (4), wherein the supporting part (4) of the positioning element (2) radially surrounds and fixes the connecting part (1) by interference fit, and wherein the outer edge protrudes The portion (3) is snap received in a groove (5) in the fitting area (30). 13. The connecting device (100) according to claim 12, characterized in that, the connecting piece (1) has an external threaded portion (80) and a handle (70), wherein the external threaded portion (80) The diameter is greater than the diameter of the shank (70); and the wall thickness of the support portion (4) of the positioning element (2) is less than or equal to the external thread portion (80) and the shank (70) radius difference. 14. The connection device (100) according to claim 12 or 13, characterized in that, the support portion (4) of the positioning element (2) is approximately semi-unilobate hyperboloid. 15. The connection device (100) according to claim 12 or 13, characterized in that, the support portion (4) of the positioning element (2) is an opening (6) along the outer edge protrusion (3) ) a plurality of tooth-shaped structures (7) extending inward. 16. The connection device (100) according to claim 12, characterized in that, the connection device (100) further comprises a sleeve (8) for accommodating the connection piece (1) and the positioning element (2) , wherein the sleeve (8) is a tubular structure with two ends open and has two openings (40, 50). 17. The connection device (100) according to claim 13, characterized in that, the connection device (100) further comprises a sleeve (8) for accommodating the connection piece (1) and the positioning element (2) , wherein the sleeve (8) is a tubular structure with two ends open and has two openings (40, 50). 18. The connection device (100) according to claim 17, characterized in that the groove (5) is located on the inner wall (9) of the sleeve (8). 19. The connecting device (100) according to claim 17, characterized in that, the axial height of the sleeve (8) is greater than the length of the external threaded part (80) and smaller than the length of the external threaded part (80) and the overall length of the shank (70). 20. The connecting device (100) according to claim 19, characterized in that the outer end of an opening (40, 50) of the sleeve (8) has a peripheral projection (10). 21. The connection device (100) according to claim 20, characterized in that, there is a threaded structure (11 ). 22. The connection device (100) according to any one of claims 17-21, characterized in that the sleeve (8) is made of metal material.