Multi-set rotary press-fitting mechanism for automobile parts

Abstract

The utility model belongs to the technical field of automobile part assembly, and particularly relates to a multi-set rotary press-fitting mechanism for automobile parts. The press-fitting device comprises a base, a tool base plate is rotationally installed on the base, two or more press-fitting stations are arranged on the tool base plate, a press-fitting unit is independently installed at each press-fitting station, and the press-fitting center of each press-fitting unit is located on the concentric circle of the rotation center of the tool base plate; the press-fitting unit comprises an upper pressing head assembly used for press-fitting of a lining and a lower positioning assembly used for pre-positioning of automobile parts, a guide column is arranged between the upper pressing head assembly and the lower positioning assembly, and the guide column is sleeved with a reset compression spring. Press fitting of multiple sets of workpieces can be achieved through a single machine, site occupation and investment risks are greatly reduced, and the press fitting machine has the advantages of being stable in work, capable of achieving self-adaptive guiding, stable in press fitting quality and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile parts assembly, and in particular relates to a multi-set rotary press-fitting mechanism for automobile parts. Background Art

[0002] Bushing press-fitting is a common process in the manufacturing process of automotive parts. The bushing and part hole are combined through the interference fit press-fitting process to obtain a better connection. It is highly efficient and widely used in the automotive manufacturing industry.

[0003] The current common practice is to use multiple press-fitting equipment to press-fit the bushings in each hole separately. The tooling center completely fixes the workpiece (such as the rear subframe) on the tooling, places the bushing directly in the assembly hole, and then multiple pressure heads press the bushing into the assembly hole. Or use robots to move the workpieces and press-fit them separately, which requires a lot of floor space and equipment investment. In the absence of certain output, the investment risk is very high. In addition, due to the dual influence of stamping part fluctuations and welding deformation, the position of the assembly hole in the tooling will change, resulting in a part of the bushing not being able to maintain a high degree of coaxiality with the pressure head during press-fitting. In order to adapt to the position of the bushing, the upper pressure head has a very wide working surface, which often causes the bushing to be crushed and part of the bushing to be tilted, causing certain quality risks and scrap losses. Utility Model Content

[0004] In order to solve the above technical problems, the purpose of the utility model is to provide a multi-set rotary press-fitting mechanism for automotive parts that can realize multiple sets of press-fitting with a single machine, has stable operation, is capable of adaptive guidance, and has stable press-fitting quality.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the utility model is: multiple sets of rotary pressing mechanisms for automotive parts, including a base, on which a tooling substrate is rotatably mounted, and on which more than two pressing stations are arranged, and each of the pressing stations is independently installed with a pressing unit, and the pressing center of each pressing unit is located on a concentric circle of the rotation center of the tooling substrate; the pressing unit includes an upper pressing head assembly for pressing a bushing and a lower positioning assembly for pre-positioning the automotive parts, a guide column is arranged between the upper pressing head assembly and the lower positioning assembly, and a reset compression spring is mounted on the guide column.

[0006] As a preferred technical solution, the upper pressure head assembly includes an upper base plate, an upper guide sleeve and an upper pressure head, the upper guide sleeve is installed on the upper base plate, and the upper pressure head is installed in the upper guide sleeve.

[0007] As a preferred technical solution, the lower positioning assembly includes a lower base plate, a fixed sleeve and a floating guide positioning sleeve, the lower base plate is installed on the tooling base plate, the fixed sleeve is installed on the lower base plate, the floating guide positioning sleeve is installed in the fixed sleeve, and the fixed sleeve is coaxially arranged with the upper guide sleeve; a guide seat is installed on the lower base plate, and the guide column slides in cooperation with the guide seat.

[0008] As a preferred technical solution, a feeding slide is installed on the tooling base plate.

[0009] As a preferred technical solution, a cam lifting mechanism is installed on the feeding slide.

[0010] As a preferred technical solution, a press-fit positioning center is provided on the base.

[0011] Due to the adoption of the above technical solution, the utility model has at least the following beneficial effects:

[0012] (1) There are more than two pressing stations on the tooling substrate, and each of the pressing stations is independently equipped with a pressing unit. The pressing center of each pressing unit is located on a concentric circle of the rotation center of the tooling substrate. In this way, a single device can effectively solve the pressing of multiple sets of workpieces, greatly reducing site occupancy and investment risks.

[0013] (2) The floating guide locating sleeve is set in the fixed sleeve. The floating guide locating sleeve will move with the fixed sleeve during operation and maintain a suitable gap with the fixed sleeve for sliding fit. When assembling the bushing, the bushing is placed in the floating guide locating sleeve, which can be adaptively guided. This has an effective tolerance function for fluctuations caused by stamping and welding, and can achieve accurate positioning accuracy when the bushing is pressed, thereby obtaining a stable press-fitting quality effect.

[0014] (3) The pressing working contact surface of the upper pressing head is processed to match the contact surface of the bushing, so that the bushing can be evenly stressed during pressing. Combined with the precise positioning of the bushing, the risk of bushing being crushed is completely avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0016] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0017] Figure 2 It is a structural schematic diagram of a press-fitting unit in an embodiment of the utility model. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and examples. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Needless to say, those skilled in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and descriptions are illustrative in nature and are not intended to limit the scope of protection of the claims.

[0019] like Figure 1 and Figure 2 As shown, multiple sets of rotary pressing mechanisms for automobile parts include a base 1, on which a tooling substrate 2 is mounted by rotation. Specifically, a rotation center hole is provided on the tooling substrate 2, and a bearing is installed in the rotation center hole, so that the tooling substrate 2 can rotate on the base 1 around the rotation center.

[0020] There are more than two pressing stations on the tooling substrate 2. In this embodiment, four stations are taken as an example for illustration. Of course, it can also be other numbers, which does not constitute a limitation on the protection scope of the utility model; each of the pressing stations is independently installed with a pressing unit 3, and the pressing center of each pressing unit 3 is located on the concentric circle of the rotation center of the tooling substrate 2; the pressing unit 3 includes an upper pressing head assembly 31 for pressing the bushing and a lower positioning assembly 32 for pre-positioning the automotive parts, a guide column 33 is arranged between the upper pressing head assembly 31 and the lower positioning assembly 32, the upper pressing head assembly 31 and the lower positioning assembly 32 are slidably matched through the guide column 33, and a return compression spring 34 is sleeved on the guide column 33.

[0021] refer to Figure 2 The upper pressing head assembly 31 includes an upper base plate 311, an upper guide sleeve 312 and an upper pressing head 313. The upper guide sleeve 312 is installed on the upper base plate 311, and the upper pressing head 313 is installed in the upper guide sleeve 312. The upper pressing head 313 and the upper guide sleeve 312 are freely slidably matched with a suitable gap. The pressing working contact surface of the upper pressing head 313 is processed to match the contact surface of the bushing, so that the bushing can be evenly stressed during pressing. With the precise positioning of the bushing, the risk of bushing crushing is completely avoided.

[0022] The lower positioning assembly 32 includes a lower base plate 321, a fixed sleeve 322 and a floating guide positioning sleeve 323. The lower base plate 321 is installed on the tooling base plate 2, the fixed sleeve 322 is installed on the lower base plate 321, and the floating guide positioning sleeve 323 is installed in the fixed sleeve 322. The floating guide positioning sleeve 323 and the fixed sleeve 322 maintain a suitable clearance and sliding fit; the fixed sleeve 322 is coaxially arranged with the upper guide sleeve 312; the floating guide positioning sleeve 323 only has a pre-positioning function for the components, and the components maintain a certain floating property on the tooling. When the bushing is fitted into the floating guide positioning sleeve, the component will produce follow-up movement, so that the assembly hole of the component and the bushing can obtain accurate positioning accuracy.

[0023] For easy installation, a guide seat 324 is installed on the lower base plate 321 , and the guide column 33 is slidably matched with the guide seat 324 , and a limit stop ring is provided at the bottom of the guide column 33 .

[0024] refer to Figure 1 A feeding slide 4 is installed on the tooling base plate 2, and the workpiece can be easily moved by the feeding slide 4. A cam lifting mechanism 5 is installed on the feeding slide 4, and the workpiece can be easily lifted and lowered by the cam lifting mechanism 5. A press-fit positioning center 6 is provided on the base 1, which is convenient for accurately rotating the parts to the positioning point to achieve accurate positioning of the tooling.

[0025] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Therefore, it cannot be understood as limiting the present invention. Any equivalent changes and modifications made by any technician in the field without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A plurality of rotary press-fitting mechanisms for automobile parts, including a base, characterized in that: A tooling base plate is rotatably mounted on the base, and more than two pressing stations are arranged on the tooling base plate, and a pressing unit is independently mounted at each of the pressing stations, and the pressing center of each pressing unit is located on a concentric circle of the rotation center of the tooling base plate; the pressing unit comprises an upper pressing head assembly for pressing a bushing and a lower positioning assembly for pre-positioning automotive parts, a guide column is arranged between the upper pressing head assembly and the lower positioning assembly, and a return compression spring is mounted on the guide column.

2. The multi-set rotary press-fitting mechanism for automobile parts according to claim 1, characterized in that: The upper pressing head assembly comprises an upper base plate, an upper guide sleeve and an upper pressing head. The upper guide sleeve is installed on the upper base plate, and the upper pressing head is installed in the upper guide sleeve.

3. The multi-set rotary press-fitting mechanism for automobile parts according to claim 2, characterized in that: The lower positioning assembly includes a lower base plate, a fixed sleeve and a floating guide positioning sleeve. The lower base plate is installed on the tooling base plate, the fixed sleeve is installed on the lower base plate, the floating guide positioning sleeve is installed in the fixed sleeve, and the fixed sleeve is coaxially arranged with the upper guide sleeve; a guide seat is installed on the lower base plate, and the guide column and the guide seat are slidably matched.

4. The multi-set rotary press-fitting mechanism for automobile parts according to claim 1, characterized in that: A feeding slide is installed on the tooling base plate.

5. The multi-set rotary press-fitting mechanism for automobile parts according to claim 4, characterized in that: A cam lifting mechanism is installed on the feeding slide.

6. The multi-set rotary press-fitting mechanism for automobile parts according to any one of claims 1 to 5, characterized in that: A press-fit positioning center is arranged on the base.

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