Subframe pair pressing bushing press fitting tool and press fitting method

Abstract

The present application provides a kind of subframe pair pressing bushing press fitting tool and press fitting method, for the press fitting of split bushing of subframe, comprising lower pressing head, upper pressing head and pressing mechanism, lower pressing head and lower bushing of split bushing cooperate, upper pressing head and upper bushing of split bushing cooperate, lower pressing head and upper pressing head are connected with pressing mechanism, by tool structure optimization change, bushing press fitting tool is designed into upper and lower pair of pressing structure, solve the problem that traditional bushing press fitting mode needs to split process separately press lower bushing and upper bushing, save equipment and labor cost.

Description

Technical Field

[0001] This invention belongs to the field of automotive manufacturing equipment technology, and relates to a subframe press-fitting tooling and press-fitting method for press-fitting a press-fitting bushing. Background Technology

[0002] Traditional subframe bushings are integral. The installation method of the bushing is as follows: first, the bushing is manually placed on the lower press head, and then the subframe is manually placed on the special bushing pressing fixture. The bushing press automatically drives the lower press head to the pressing position, and then the press equipment automatically presses the bushing into place from bottom to top.

[0003] For example, Chinese patent CN216576452U discloses a subframe bushing pressing fixture shared by multiple vehicle models. The subframe positioning assembly for model A includes four model A subframe positioning bases for supporting the model A subframe and four model A bushing press heads for pressing the model A subframe bushings. The model A subframe positioning bases are respectively fixedly connected to the upper end face of the turntable and correspond to the bushing mounting holes of the model A subframe. After the model A subframe is positioned on the turntable by the model A subframe positioning bases, the model A subframe bushings to be pressed mate with the corresponding bushing mounting holes, and the model A bushing press heads mate with the upper end face of the corresponding model A subframe bushing.

[0004] However, the aforementioned pressing fixture is for subframe bushings and can only press integral bushings. When the subframe bushing is changed to a split type, requiring pressing in both the upper and lower directions, the existing bushing press and pressing fixture cannot press the upper and lower bushings simultaneously. The upper and lower bushings need to be pressed in two separate processes, increasing equipment and labor costs. Summary of the Invention

[0005] This invention provides a subframe pressing bushing fixture and pressing method. By optimizing and modifying the fixture structure, the bushing pressing fixture is designed as an upper and lower pressing structure, which solves the problem that the traditional bushing pressing method requires separate processes to press the lower and upper bushings separately, thus saving equipment and labor costs.

[0006] The technical solution of this invention is as follows: A subframe bushing pressing fixture for pressing split bushings of a subframe, comprising a lower pressing head, an upper pressing head, and a clamping mechanism. The lower pressing head mates with the lower bushing of the split bushing, and the upper pressing head mates with the upper bushing of the split bushing. Both the lower and upper pressing heads are connected to the clamping mechanism. During bushing pressing, this invention uses the clamping mechanism to drive the upper and lower pressing heads, simultaneously pressing the upper and lower subframe bushings into place. This solves the problem of traditional bushing pressing methods requiring separate processes to press the lower and upper bushings separately, saving equipment and labor costs.

[0007] Preferably, the clamping mechanism includes a lower support block, a guide post, a lower bushing positioning pin, and an upper bushing positioning pin. The upper bushing positioning pin passes through the middle hole of the split bushing and connects to the upper pressure head. The lower bushing positioning pin axially and movably passes through the lower pressure head. The upper end of the lower bushing positioning pin abuts against the lower end of the upper bushing positioning pin. The lower bushing positioning pin, the guide post, and the lower support block are connected sequentially from top to bottom.

[0008] Preferably, it further includes a lower buffer spring with one end connected to the lower support block and sleeved on the outer wall of the guide post, and an upper buffer spring with one end connected to the guide post and the other end connected to the lower part of the lower bushing positioning pin. The upper buffer spring provides over-buffering during the downward movement, reducing impact and vibration, ensuring a smooth pressing process and good pressing effect. At the same time, after pressing is completed, the pressing mechanism releases force, and the lower bushing positioning pin automatically returns to its original position under the action of the upper buffer spring.

[0009] Preferably, the upper end of the guide post has a countersunk hole facing downwards, and the lower part of the lower bushing positioning pin and the upper buffer spring are both disposed within the countersunk hole. This design is simple, reduces axial length, and facilitates installation.

[0010] Preferably, the lower bushing locating pin, the upper bushing locating pin, and the guide post are all coaxially arranged. This simplifies the structural design and reduces processing and installation costs.

[0011] Preferably, the split bushings are provided at each of the four corners of the subframe, and four clamping mechanisms are provided. Using four clamping mechanisms to simultaneously clamp the subframe bushings improves efficiency.

[0012] This invention also discloses a pressing method for a subframe pressing bushing tool, comprising the following steps:

[0013] S1: Pre-install the bushing tube onto the subframe, insert the lower bushing into the lower bushing positioning pin, and make the lower end face of the lower bushing fit against the contoured surface of the lower pressure head.

[0014] S2: Pre-install the upper bushing onto the upper end face of the bushing tube, insert the upper bushing positioning pin into the middle hole of the upper bushing, and make the contour surface of the upper pressure head fit against the upper end face of the upper bushing.

[0015] S3: The clamping mechanism presses the lower bushing into place from bottom to top by pushing the lower end face of the lower support block;

[0016] S4: The upper end of the pressing mechanism pushes the upper end face of the upper pressure head to press the upper bushing into place from top to bottom. During the pressing process, the upper bushing positioning pin pushes the lower bushing positioning pin to move downward.

[0017] S5: After pressing is completed, the pressing mechanism is unloaded, and the lower bushing positioning pin automatically returns to its original position under the action of the upper buffer spring, allowing for manual removal of the part.

[0018] Then repeat the above steps to perform the next pressing and installation of the upper and lower bushings of the subframe.

[0019] Preferably, step 1 also includes placing the four lower bushings of the subframe into place, and then placing the four subframes onto the clamping mechanism, which saves multiple placement and positioning steps and improves production efficiency.

[0020] The beneficial effects of this invention are:

[0021] After using the press-fit bushing tooling, the upper and lower bushings of the subframe can be press-fitted simultaneously. The upper and lower bushings do not need to be separated into separate pressing processes, saving equipment and labor costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an integral bushing in the prior art.

[0023] Figure 2 This is a schematic diagram of the structure of the split bushing described in this invention.

[0024] Figure 3 This is a schematic diagram of the structure of a subframe pressing bushing tool according to the present invention.

[0025] Figure 4 yes Figure 3 Enlarged view of the structure at point A in the middle.

[0026] Figure 5 This is a schematic diagram of the subframe of the present invention in the state of being installed at the press-fitting station.

[0027] Figure 6 This is a schematic diagram of the subframe bushing before press-fitting according to the present invention.

[0028] Figure 7 This is a schematic diagram of the subframe bushing after press-fitting according to the present invention.

[0029] Figure 8 The process flow diagram of the press-fitting method described in this invention.

[0030] In the diagram: 1-Bushing tube, 2-Integral bushing, 3-Upper bushing, 4-Lower bushing, 5-Subframe, 6-Pressure mechanism, 601-Lower support block, 602-Guide post, 603-Lower bushing positioning pin, 604-Upper bushing positioning pin, 605-Lower buffer spring, 606-Upper buffer spring, 7-Lower pressure head, 8-Upper pressure head. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0032] In the description of this invention, it should be understood that the terms "left", "right", "up", "down", "front", "back", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or structure referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0033] Example 1:

[0034] like Figures 2-4 As shown, a subframe pressing bushing fixture is used for pressing split bushings of the subframe 5. It includes a lower pressing head 7, an upper pressing head 8, and a clamping mechanism 6. The lower pressing head 7 cooperates with the lower bushing 4 of the split bushing, and the upper pressing head 8 cooperates with the upper bushing 3 of the split bushing. Both the lower pressing head 7 and the upper pressing head 8 are connected to the clamping mechanism 6. This embodiment addresses the challenge of pressing split bushings, specifically the difficulty of pressing the upper bushing 3 and lower bushing 4 of the subframe 5 in two separate processes. By designing the bushing pressing fixture with an upper and lower pressing structure, the upper and lower bushings of the subframe 5 can be pressed simultaneously without requiring separate pressing processes for the upper and lower bushings 3 and 4, thus saving equipment and labor costs.

[0035] Example 2:

[0036] This embodiment addresses existing technologies, such as... Figure 1 As shown, the traditional subframe bushing is an integral bushing, consisting of a bushing tube 1 and an integral bushing 2. The integral bushing 2 is first manually placed onto the lower pressure head 7, while the subframe 5 is manually placed onto a dedicated bushing pressing fixture. The bushing press automatically moves the lower pressure head 7 to the pressing position, and then the press automatically presses the integral bushing into place from bottom to top. When the above device requires pressing in both the upper and lower directions, the existing bushing press and pressing fixture cannot press the bushing simultaneously.

[0037] like Figures 2-4 As shown, a subframe pressing bushing fixture is used for pressing split bushings of a subframe 5. It includes a lower pressing head 7, an upper pressing head 8, and a clamping mechanism 6. The lower pressing head 7 mates with the lower bushing 4 of the split bushing, and the upper pressing head 8 mates with the upper bushing 3 of the split bushing. Both the lower pressing head 7 and the upper pressing head 8 are connected to the clamping mechanism 6. The upper pressing head 8 is located at the upper end of the clamping mechanism 6, and the lower pressing head 7 is located at the bottom of the clamping mechanism 6.

[0038] In this embodiment, the pressing mechanism 6 includes a lower support block 601, a guide post 602, a lower bushing positioning pin 603, and an upper bushing positioning pin 604. The upper bushing positioning pin 604 passes upward through the middle hole of the split bushing and connects to the upper pressure head 8. The lower bushing positioning pin 603 axially and movably passes through the lower pressure head 7. The upper end of the lower bushing positioning pin 603 abuts against the lower end of the upper bushing positioning pin 604. The lower bushing positioning pin 603, guide post 602, and lower support block 601 are connected sequentially from top to bottom. The lower support block 601, guide post 602, lower bushing positioning pin 603, and upper bushing positioning pin 604 can all move axially up and down to achieve the pressing of the bushing.

[0039] like Figure 4 As shown, in this embodiment, both the lower bushing 4 and the upper bushing 3 are located inside the bushing tube 1. The lower bushing 4 is located at the lower part of the inner side of the bushing tube 1, while the upper bushing 3 is located at the upper part of the inner side of the bushing tube 1.

[0040] like Figure 3 As shown, in this embodiment, a lower buffer spring 605, one end of which is connected to the lower support block 601 and sleeved on the outer wall of the guide post 602, is also included. An upper buffer spring 606, one end of which is connected to the guide post 602 and the other end of which is connected to the lower part of the lower bushing positioning pin 603, is also included. The upper buffer spring 606 provides over-buffering during the downward movement, reducing impact and vibration. The pressing process is smooth, and the pressing effect is good. Simultaneously, after pressing is completed, the clamping mechanism 6 releases force, and the lower bushing positioning pin 603 automatically returns to its original position under the action of the upper buffer spring 606.

[0041] like Figure 3 As shown, in this embodiment, the upper end of the guide post 602 is provided with a countersunk hole, and the lower part of the lower bushing positioning pin 603 and the upper buffer spring 606 are both disposed in the countersunk hole.

[0042] like Figure 3 As shown, in this embodiment, the lower bushing positioning pin 603, the upper bushing positioning pin 604, and the guide post 602 are all coaxially arranged.

[0043] like Figure 5 As shown, in this embodiment, the split bushings are provided on the four corners of the subframe 5, and the clamping mechanism 6 is set to 4.

[0044] Example 3:

[0045] like Figure 8 As shown, this embodiment describes a pressing method using the subframe pressing bushing tooling from Embodiment 2 above, comprising the following steps:

[0046] S1: Pre-install the bushing tube 1) onto the subframe 5, insert the lower bushing 4 into the lower bushing positioning pin 603, and make the lower end face of the lower bushing 4 fit with the contoured surface of the lower pressure head 7.

[0047] S2: Pre-install the upper bushing 3 onto the upper end face of the bushing tube 1, insert the upper bushing positioning pin 604 into the middle hole of the upper bushing 3, and make the contoured surface of the upper pressure head 8 fit against the upper end face of the upper bushing 3. After step 2, the state is as follows. Figure 6 As shown;

[0048] S3: The clamping mechanism 6 presses the lower bushing 4 into place from bottom to top by pushing the lower end face of the lower support block 601;

[0049] S4: The upper end of the pressing mechanism 6 pushes the upper end face of the upper pressing head 8 to press the upper bushing 3 into place from top to bottom. During the pressing process, the upper bushing positioning pin 604 pushes the lower bushing positioning pin 603 to move downward.

[0050] S5: After pressing is completed, the clamping mechanism 6 is released, and the lower bushing positioning pin 603 automatically returns to its original position under the action of the upper buffer spring 606. The part is then manually removed, and the state after pressing is as follows: Figure 7 As shown.

[0051] Then repeat the above actions to perform the next pressing and installation of the upper and lower bushings of the subframe 5.

[0052] like Figure 5 As shown, step 1 of this embodiment also includes placing the four lower bushings 4 of the subframe 5 into place, and then placing four bushings at the four corners of the subframe 5 onto the pressing mechanism 6, which saves multiple placement and positioning steps and improves production efficiency.

Claims

1. A subframe press-fitting fixture for press-fitting split bushings of a subframe (5), characterized in that... The device includes a lower pressure head (7), an upper pressure head (8), and a clamping mechanism (6). The lower pressure head (7) is fitted with the lower bushing (4) of the split bushing, and the upper pressure head (8) is fitted with the upper bushing (3) of the split bushing. Both the lower pressure head (7) and the upper pressure head (8) are connected to the clamping mechanism (6). The clamping mechanism (6) includes a lower support block (601), a guide post (602), a lower bushing positioning pin (603), and an upper bushing positioning pin (604). The upper bushing positioning pin (604) passes upward through the middle hole of the split bushing and connects to the upper pressure head (8). The lower bushing positioning pin (603) is axially movable through the lower pressure head (7). The head (7) has the upper end of the lower bushing positioning pin (603) and the lower end of the upper bushing positioning pin (604) abutting each other. The lower bushing positioning pin (603), the guide post (602), and the lower support block (601) are connected from top to bottom. It also includes an upper buffer spring (606) with one end connected to the guide post (602) and the other end connected to the lower part of the lower bushing positioning pin (603). The upper end of the guide post (602) has a countersunk hole, and the lower part of the lower bushing positioning pin (603) and the upper buffer spring (606) are both set in the countersunk hole. The lower bushing positioning pin (603), the upper bushing positioning pin (604), and the guide post (602) are all coaxially arranged.

2. The subframe pressing bushing tooling according to claim 1, characterized in that: It also includes a lower buffer spring (605) that is connected at one end to the lower support block (601) and sleeved on the outer wall of the guide post (602).

3. The subframe pressing bushing fixture according to claim 2, characterized in that: The split bushings are provided on the four corners of the subframe (5), and the clamping mechanism (6) is set to 4.

4. A pressing method using the subframe pressing bushing tool as described in claim 2, characterized in that... Includes the following steps: S1: Pre-install the bushing tube (1) onto the subframe (5), insert the lower bushing (4) into the lower bushing positioning pin (603), and make the lower end face of the lower bushing (4) fit with the contour surface of the lower pressure head (7); S2: Pre-install the upper bushing (3) onto the upper end face of the bushing tube (1), insert the upper bushing positioning pin (604) into the middle hole of the upper bushing (3), and make the contour surface of the upper pressure head (8) fit against the upper end face of the upper bushing (3). S3: The pressing mechanism (6) presses the lower bushing (4) into place from bottom to top by pushing the lower end face of the lower support block (601); S4: The upper end of the pressing mechanism (6) pushes the upper end face of the upper pressing head (8) to press the upper bushing (3) into place from top to bottom. During the pressing process, the upper bushing positioning pin (604) pushes the lower bushing positioning pin (603) to move downward. S5: After the pressing is completed, the pressing mechanism (6) releases the force, and the lower bushing positioning pin (603) automatically returns to its original position under the action of the upper buffer spring (606), and the part is removed manually.

5. The pressing method according to claim 4, characterized in that: Step 1 also includes the step of placing the subframe (5) onto the clamping mechanism (6) after all four lower bushings (4) of the subframe (5) are in place.

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