Press-fitting tool for bushing of auxiliary frame

Abstract

The utility model provides an auxiliary frame lining press fitting tool which comprises a workbench base, a bearing, a guide sleeve, a guide column and a spring. The workbench base, the bearing and the guide sleeve are sequentially connected end to end from bottom to top, the lower portion of the guide column is axially and movably arranged in the guide sleeve, the upper portion of the guide column extends towards the upper portion of the guide sleeve, and the spring is arranged between the guide sleeve and the guide column. The outer wall face of the guide column is of a step shape and is sequentially provided with a lining pre-installing position and a lining pipe installing position from top to bottom. The press-fitting process is adjusted, a bushing positioning tool and a bushing pipe positioning tool are integrated, the tool structure is optimized and changed, an auxiliary frame bushing pipe is positioned, and bushing preassembling is integrated on the same tool table, so that the integrated press-fitting process is realized, the production takt is improved, the phenomenon of bushing edge shoveling cannot occur in the press-fitting process, and the production efficiency is improved. The qualification rate of the bushing is close to 100%, and the product quality is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile parts manufacturing, in particular to a sub-frame bushing press-fitting tool. Background Art

[0002] For the subframe bushing press-fitting process, currently, separate press-fitting is mostly used, that is, the subframe is used for positioning, and the clamping cylinder and positioning pins are used to ensure that the subframe is fixed on the fixture. On the other side, the bushing is pre-installed on the press equipment, and the press automatically aligns the bushing tube position according to the set program, and then the electric cylinder is started for press-fitting. The subframe and bushing are pre-installed on two sets of fixtures, namely the bushing positioning fixture and the bushing tube positioning fixture, and the positioning and press-fitting functions are completed by program settings.

[0003] In the prior art, the bushing positioning tool and the bushing tube positioning tool are used to position and press the bushing and the bushing tube respectively. The pressing process requires extremely high positioning accuracy of the two sets of tooling. The subframe needs to be completely fixed and firm, and there must be no deviation in the pre-installation of the bushing, which places extremely high requirements on the operating stability of the equipment.

[0004] When the locating pins are loose or worn, or the subframe locating holes are greatly affected by welding and deformed, the bushing press-fitting often results in unqualified conditions such as scraping and flanging.

[0005] The edge scraping of the press-fit bushing causes the pin to jam, which in turn affects the tooling accuracy, leading to a repetitive vicious cycle, greatly consuming manpower and material resources and causing low efficiency. Utility Model Content

[0006] The utility model provides a press-fitting tool for a subframe bushing, adjusts the press-fitting process, combines a bushing positioning tool with a bushing tube positioning tool, optimizes and changes the tool structure, positions the bushing tube of the subframe, and simultaneously pre-assembles and integrates the bushing into the same tooling table, thereby realizing an integrated press-fitting process and improving the production rhythm. The bushing edge scraping phenomenon will not occur during the press-fitting process, the bushing qualification rate is close to 100%, and the product quality is improved.

[0007] A subframe bushing press-fitting tool is used for press-fitting the bushing of the subframe, comprising a workbench base, a bearing, a guide sleeve, a guide column and a spring; the workbench base, the bearing and the guide sleeve are connected end to end from bottom to top, the two ends of the bearing are respectively connected to the upper part of the workbench base and the lower part of the guide sleeve, the base of the bearing is connected to the workbench base, and the shaft ring cooperates with the guide sleeve, so as to play a compensatory role when there is a slight misalignment in the up and down stroke of the press, and the self-lubricating effect of the bearing is better.

[0008] The lower part of the guide column is axially movable and arranged in the guide sleeve, the upper part of the guide column passes through the guide sleeve and extends upward, the spring is arranged between the guide sleeve and the guide column, the guide column can be extended and retracted up and down along the axis of the guide sleeve, and the spring is lifted up in a natural state.

[0009] The guide column is constructed in a step shape and is sequentially constructed as a bushing pre-installation position and a bushing tube installation position from top to bottom. The bushing pre-installation position is used to position the bushing, and the bushing tube installation position is used to position the bushing tube. When the bushing tube is placed, the bushing tube is positioned into the lower step of the guide column, and the bushing is pre-installed on the upper step. The utility model abandons the original bushing positioning tooling on the existing press, combines the bushing positioning tooling with the bushing tube positioning tooling into one, directly uses the bushing tube for positioning, abandons the original clamping mechanism, and the improved tooling does not need to be clamped.

[0010] Preferably, the utility model further comprises a pressing block, which is in the shape of a circular ring, the inner side of which abuts against the protrusion below the guide column and the outer side is fixedly connected to the upper end surface of the guide sleeve. The pressing block is used to abut against the edge of the annular protrusion below the guide column, thereby limiting the position of the guide column and ensuring that the press-fitting process works reliably and stably.

[0011] Preferably, the utility model also includes a shock-absorbing column, which is arranged between the workbench base and the guide sleeve, and the shock-absorbing column is circumferentially arranged on the outside of the bearing; the bearing is an angular contact thrust spherical bearing, the base of the bearing is connected to the workbench base, the shaft ring is matched with the guide sleeve, and the function of the spherical bearing is to compensate when there is a slight misalignment in the up and down stroke of the press, and the bearing has a good self-lubricating effect. The shock-absorbing column is a VD type shock-absorbing column, and the guide sleeve, the spherical thrust bearing and the shock-absorbing column jointly play the role of axial fixation and radial floating.

[0012] Preferably, the utility model also includes a lifting ring arranged on the workbench base, and the lifting ring is provided in two numbers and is arranged on the edge of the workbench base to facilitate lifting and replacement. When it is necessary to replace different types of subframe bushing pressing tooling, the lifting ring can be used for integral lifting, and the model change is convenient, and the model change only requires replacing the integrated tooling table.

[0013] Preferably, the workbench base is in the shape of a long strip, and the number of the guide sleeves is two and they are respectively arranged at the two end edges of the workbench base in the length direction. The workbench base is a whole long thick plate to ensure that the left and right sides of the press are subjected to synchronous force when the press is working. The workbench base has a compact structure and the length of the workbench base is minimized. According to the product structure of the sub-frame, two left and right guide tooling seats are designed and fixed on the tooling base. One sub-frame bushing press tooling can simultaneously meet the installation of two bushings.

[0014] Specifically, in the utility model, the bushing pre-installation position and the bushing tube installation position are both constructed as cylindrical outer surfaces, the outer diameter of the bushing pre-installation position is smaller than the outer diameter of the bushing tube installation position, the structure is simple, and it is easy to cooperate with the subframe bushing and bushing tube.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The original bushing positioning tool on the press is abandoned, and the bushing positioning tool and the bushing tube positioning tool are combined into one, which makes it easy to position the workpiece and does not require a clamping cylinder to clamp it.

[0017] The process flow is simplified. The operator does not need to accurately position the workpiece. He only needs to insert the subframe bushing tube into the tooling and then place the bushing on the upper part of the guide column. The internal operation is simplified, and the production cycle is increased from 35JPH to 50JPH, which improves efficiency. After the overall improvement, the cycle and quality effects are significant.

[0018] Due to the use of integrated tooling, the bushing and bushing tube have pre-installed guides during the press-fitting process. The tooling has its own guide. The bushing is pre-installed and the diameter contacts the bushing tube. There will be no edge scrapping after press-fitting. The bushing qualification rate is close to 100%, and the product quality is improved. At the same time, it reduces material scrapping, saves costs, and saves manpower and material consumption.

[0019] Because it adopts integrated tooling and lifting rings, it is easy to change the model. To change the model, you only need to replace the integrated tooling table. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The utility model is an overall structural diagram of a sub-frame bushing press-fitting tool.

[0021] Figure 2 yes Figure 1 Sectional view in direction A.

[0022] Figure 3 It is a structural schematic diagram of the utility model in a state where the auxiliary frame is pre-assembled.

[0023] Figure 4 It is a cross-sectional view of the utility model after the auxiliary frame is pre-installed and the bushing is about to be press-installed.

[0024] Figure 5 It is a cross-sectional view of the bushing and bushing tube of the utility model after being assembled.

[0025] In the figure: 1-workbench base, 2-guide sleeve, 3-pressure block, 4-guide column, 401-bushing pre-installation position, 402-bushing tube installation position, 5-spring, 6-bearing, 7-shock absorber column, 8-subframe, 9-lifting ring, 10-bushing tube, 11-bushing. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0027] In the description of the present invention, it should be understood that the terms "left", "right", "up", "down", "front", "back", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or structure referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0028] Embodiment 1:

[0029] like Figures 1-2 As shown, a subframe bushing press-fitting tool comprises a workbench base 1, a bearing 6, a guide sleeve 2, a guide column 4 and a spring 5; the workbench base 1, the bearing 6 and the guide sleeve 2 are sequentially connected end to end from bottom to top, the lower part of the guide column 4 is axially movably arranged in the guide sleeve 2, the upper part of the guide column 4 passes through the guide sleeve 2 and extends upward, the spring 5 is arranged between the guide sleeve 2 and the guide column 4, the guide column 4 is constructed in a step shape and is sequentially constructed as a bushing pre-installation position 401 and a bushing tube installation position 402 from top to bottom.

[0030] like Figures 3-4 As shown, the working principle of the utility model is: the guide column 4 can be extended and retracted up and down along the guide sleeve 2, the spring 5 is lifted up in the natural state, and the bushing tube 10 of the subframe 8 is positioned into the bushing tube installation position 402 below the guide column 4 when the parts are placed, and the bushing 11 is pre-installed on the upper step, that is, the bushing pre-installation position 401;

[0031] Then, the subframe 8 is pre-installed on the workbench. During the press-fitting, the electric cylinder head of the press presses the upper part of the bushing 11 and pushes it downward. The bushing 11 and the guide column 4 are gradually pressed downward. The lower part of the bushing tube 10 abuts against the upper part of the guide sleeve 2 and does not move. The bushing 11 is pressed into the bushing tube 10 as the stroke is pressed downward. After the bushing tube 10 and the bushing 11 are installed together, Figure 5 As shown, the bushing tube 10 is installed on the outer wall of the bushing 11. After the press-fitting is completed, the electric cylinder pressure head of the press machine releases the force and returns to its original position, and the spring 5 returns to its original state to lift the guide column 4 and the auxiliary frame 8, making it convenient for employees to take the parts.

[0032] Embodiment 2:

[0033] like Figure 1 and Figure 2As shown, a subframe bushing press-fitting tool is used for pressing the bushing 11 of the subframe 8, including a workbench base 1, a bearing 6, a guide sleeve 2, a guide column 4 and a spring 5; the workbench base 1, the bearing 6 and the guide sleeve 2 are connected end to end from bottom to top, and the two ends of the bearing 6 are respectively connected to the upper part of the workbench base 1 and the lower part of the guide sleeve 2, the base of the bearing 6 is connected to the workbench base 1, and the shaft ring cooperates with the guide sleeve 2, which plays a compensatory role when there is a slight misalignment in the up and down stroke of the press, and at the same time, the self-lubricating effect of the bearing 6 is better.

[0034] like Figure 2 As shown, the lower part of the guide column 4 is axially movable and arranged in the guide sleeve 2, the upper part of the guide column 4 passes through the guide sleeve 2 and extends upward, the spring 5 is arranged between the guide sleeve 2 and the guide column 4, the guide column 4 can be extended and retracted up and down along the axial direction of the guide sleeve 2, and the spring 5 is lifted up in the natural state.

[0035] like Figure 2 As shown, the guide column 4 is constructed in a step shape and is sequentially constructed from top to bottom as a bushing pre-installation position 401 and a bushing tube installation position 402 .

[0036] like Figure 4 As shown, the bushing pre-installation position 401 is used to position the bushing 11, and the bushing tube installation position 402 is used to position the bushing tube 10. When the bushing tube 10 of the subframe 8 is placed, it is positioned into the lower end step of the guide column 4, and the bushing 11 is pre-installed on the upper end step.

[0037] like Figure 2 As shown, this embodiment also includes a pressing block 3, the inner side of which abuts against the protrusion below the guide column 4 and the outer side is fixedly connected to the upper end surface of the guide sleeve 2. The pressing block 3 is used to limit the guide column 4 to ensure that the press-fitting process works reliably and stably.

[0038] like Figure 2 As shown, this embodiment also includes a shock-absorbing column 7, which is arranged between the workbench base 1 and the guide sleeve 2, and the shock-absorbing column 7 is circumferentially arranged on the outside of the bearing 6; the bearing 6 is an angular contact thrust spherical bearing, the base of the bearing 6 is connected to the workbench base 1, the shaft ring is matched with the guide sleeve 2, the function of the spherical bearing 6 is to compensate when there is a slight misalignment in the up and down stroke of the press, and the bearing 6 has a good self-lubricating effect. The shock-absorbing column 7 is a shock-absorbing column 7VD type, and the guide sleeve 2, the bearing 6 and the shock-absorbing column 7 together play the role of axial fixing and radial floating.

[0039] like Figure 1As shown, the present embodiment further includes a lifting ring 9 arranged on the workbench base 1. The lifting ring 9 is provided in two numbers and is arranged on the edge of the workbench base 1 for easy lifting and replacement. When it is necessary to replace a different type of sub-frame bushing pressing tooling, the lifting ring 9 can be used for integral lifting, which is convenient for changing the model, and only requires replacing the integrated tooling table.

[0040] like Figure 1 As shown, in this embodiment, the workbench base 1 is in the shape of a long strip, and the number of the guide sleeves 2 is two and they are respectively arranged at the two end edges in the length direction of the workbench base 1. The workbench base 1 is a whole long and thick plate, which ensures that the left and right sides of the press are synchronously stressed when working. The workbench base 1 has a compact structure and the length of the workbench base 1 is minimized.

[0041] like Figure 1 As shown, in this embodiment, the bushing pre-installation position 401 and the bushing tube installation position 402 are both configured as cylindrical outer surfaces, and the outer diameter of the bushing pre-installation position 401 is smaller than the outer diameter of the bushing tube installation position 402 .

Claims

1. A subframe bushing press-fitting tool, characterized in that The invention comprises a workbench base (1), a bearing (6), a guide sleeve (2), a guide column (4) and a spring (5); the workbench base (1), the bearing (6) and the guide sleeve (2) are connected end to end in sequence from bottom to top; the lower part of the guide column (4) is axially movable and arranged in the guide sleeve (2); the upper part of the guide column (4) passes through the guide sleeve (2) and extends upward; the spring (5) is arranged between the guide sleeve (2) and the guide column (4); the guide column (4) is constructed in a step-like shape and is constructed in sequence from top to bottom as a bushing pre-installation position (401) and a bushing tube installation position (402).

2. The subframe bushing press-fitting tool according to claim 1, characterized in that: It also comprises a pressing block (3), the inner side of which abuts against a protrusion below the guide column (4) and the outer side of which is fixedly connected to the upper end surface of the guide sleeve (2).

3. The subframe bushing press-fitting tool according to claim 1, characterized in that: It also comprises a shock absorbing column (7), wherein the shock absorbing column (7) is arranged between the workbench base (1) and the guide sleeve (2), and the shock absorbing column (7) is arranged circumferentially on the outside of the bearing (6).

4. The subframe bushing press-fitting tool according to claim 1, characterized in that: It also includes a hanging ring (9) arranged on the workbench base (1).

5. The subframe bushing press-fitting tool according to claim 1, characterized in that: The workbench base (1) is in the shape of an elongated strip, and the guide sleeves (2) are two in number and are respectively arranged at the two end edges of the workbench base (1) in the length direction.

6. The subframe bushing press-fitting tool according to claim 1, characterized in that: The bushing pre-installation position (401) and the bushing tube installation position (402) are both configured as cylindrical outer surfaces, and the outer diameter of the bushing pre-installation position (401) is smaller than the outer diameter of the bushing tube installation position (402).

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