Multi-shaft floating tool for bushing of rear subframe of automobile

Abstract

The utility model discloses an automobile rear subframe bushing multi-shaft floating tool which is characterized in that the tool comprises a tool bottom plate, and four supporting and guiding mechanisms are distributed on the tool bottom plate in a rectangular shape; by the adoption of the method, the four supporting and guiding mechanisms are arranged, synchronous press fitting of the four bushings is achieved at the same time, the working efficiency is improved, and the four supporting and guiding mechanisms can have certain floating freedom degrees in the transverse direction and the axial direction; by means of effective pre-positioning, the situations that the automobile rear auxiliary frame cannot be positioned due to welding deformation and secondary deformation and even cracking of the automobile rear auxiliary frame are possibly caused during press fitting of the lining can be avoided, the press fitting precision of the automobile rear auxiliary frame lining is effectively improved, and the reject ratio of products is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts assembly, in particular to a floating tooling for a rear auxiliary frame bushing of an automobile. Background Art

[0002] Currently, automotive subframes are increasingly used in vehicles. They not only serve as intermediate connections but also provide shock absorption and cushioning, enhancing vehicle comfort. Like the connecting rods and control arms in a vehicle's steering system, subframes require bushings. Bushings are rubber-to-metal components that cushion and absorb vibrations from the ground and vehicle body. Their primary functions are shock absorption, noise isolation, fatigue reduction, and increased vehicle life. They play a crucial role in vehicle operational stability, enhancing driver comfort and driving stability.

[0003] During the assembly of automotive subframes on the production line, bushing assembly is a critical step. Four bushings are required along the Z-axis of the automotive subframe. Because the subframe is a relatively large, thin-walled component, deformation is inevitable during production. This makes it difficult to center the bushing during press-fitting, preventing it from being completely concentric with the sleeve. This can lead to bushing misalignment, damage, and substandard press-fit dimensions. Press-fitting stability and consistency are poor, hindering quality assurance. Defects such as misalignment of the bushing's center core shaft 27, trimming, and fracturing can occur.

[0004] Therefore, it is urgent to design a floating tooling for the rear subframe bushing of an automobile to overcome the deficiencies of one or more of the above-mentioned prior arts. Utility Model Content

[0005] The technical solution adopted by the utility model to solve the above-mentioned technical problems is: to provide a floating tool for the bushing of the rear subframe of an automobile, characterized in that it includes: a tooling base plate, the tooling base plate is rectangularly distributed and provided with four supporting and guiding mechanisms; each of the supporting and guiding mechanisms includes a positioning seat, the positioning seat is fixedly connected to the tooling base plate, a supporting bottom ring is coupled in the positioning seat, a plurality of bottom ring floats are embedded in the supporting bottom ring, the supporting bottom ring is floated and placed on the tooling base plate through the bottom ring floats, the supporting bottom ring is also connected to a guide column, a plurality of guide column floats are embedded in the circumferential side of the guide column, the guide column can move in the positioning seat through the guide column float, the guide column is coaxially coupled with a core shaft, the top end of the core shaft is connected with a bushing pin, the bushing pin is used to limit the freedom of the bushing in the circumferential direction, the bottom of the core shaft is also connected to a compression spring, and the other end of the compression spring is connected to the supporting bottom ring.

[0006] In a preferred embodiment, a soft cushion is further provided on the top end of the guide post.

[0007] In a preferred embodiment, the peripheral sides of the tooling base plate are all provided with hanging rings.

[0008] In a preferred embodiment, two pneumatic pre-pressing mechanisms are further provided at intervals in the middle of the tooling base plate.

[0009] In a preferred embodiment, it further comprises: a pressing clamp, which lifts the force-bearing surface of the bushing during press-fitting.

[0010] The beneficial effects of the present utility model are as follows: the present application realizes the synchronous press-fitting of four bushings at the same time by setting four supporting and guiding mechanisms, thereby improving work efficiency, and the four supporting and guiding mechanisms can have a certain floating freedom in both the lateral and axial directions, and effective pre-positioning can avoid the situation where the rear subframe of the automobile cannot be positioned due to welding deformation, and the rear subframe of the automobile may cause secondary deformation or even cracking when the bushing is pressed, thereby effectively improving the press-fitting accuracy of the bushing of the rear subframe of the automobile and reducing the defective rate of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the utility model;

[0012] Figure 2 This is an exploded schematic diagram of the support and guide mechanism of the utility model.

[0013] In the picture:

[0014] 10. Tooling base plate; 11. Pneumatic preloading mechanism; 12. Lifting ring; 20. Support and guide mechanism; 21. Positioning seat; 22. Support bottom ring; 23. Bottom ring float; 24. Guide column; 25. Guide column float; 26. Cushion; 27. Core shaft; 28. Bushing pin; 29. ​​Compression spring; 30. Press pliers 30. DETAILED DESCRIPTION

[0015] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0016] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms, "connection", and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "communication" can be a direct connection or an indirect connection through an intermediate medium. Here, "fixed" means that the two are connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present invention, such as "inside", "outside", "top", "bottom", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0017] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0018] In the embodiments of the present invention, "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0019] References to "one embodiment" or "some embodiments" in this specification mean that one or more embodiments of the present invention include a particular feature, structure or characteristic described in conjunction with that embodiment. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in other embodiments" that appear in different places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "comprise," "include," "have," and their variations all mean "including but not limited to," unless otherwise specifically emphasized. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0020] like Figure 1-Figure 2As shown, the utility model provides a floating tooling for the rear subframe bushing of an automobile, characterized in that it includes: a tooling base plate 10, the tooling base plate 10 is rectangularly distributed and provided with four support guide mechanisms 20; each of the support guide mechanisms 20 includes a positioning seat 21, the positioning seat 21 is fixedly connected to the tooling base plate 10, a supporting bottom ring 22 is coupled to the positioning seat 21, and a plurality of bottom ring floats 23 are embedded in the supporting bottom ring 22, and the supporting bottom ring 22 is floated on the tooling through the bottom ring float 23. On the bottom plate 10, the support bottom ring 22 is further connected to a guide column 24, and a plurality of guide column floats 25 are embedded in the circumferential side of the guide column 24. The guide column 24 can move in the positioning seat 21 through the guide column float 25. The guide column 24 is coaxially coupled with a core shaft 27. The top end of the core shaft 27 is connected to a bushing pin 28. The bushing pin 28 is used to limit the degree of freedom of the bushing in the circumferential direction. The bottom of the core shaft 27 is also connected to a compression spring 29, and the other end of the compression spring 29 is connected to the support bottom ring 22;

[0021] Specifically, the tooling base plate 10 is connected to the tooling table of the external equipment, the positioning seat 21 is a hollow annular column, the positioning seat 21 is fixedly connected to the tooling base plate 10, and a supporting bottom ring 22 is coupled inside the bottom end of the positioning seat 21. The bottom of the supporting bottom ring 22 is provided with four bottom ring floats 23. The supporting bottom ring 22 is suspended on the working base plate through the bottom ring floats 23. The top of the supporting bottom ring 22 is also connected to a guide column 24. The diameter of the guide column 24 is smaller than the positioning seat 21. A plurality of guide column floats 25 are provided along the circumference of the guide column 24. The column 24 passes through the guide column float 25, one end of the guide column float 25 is against the inner wall of the positioning seat 21, wherein the bottom ring float 23 and the guide column float 25 are both provided with springs, the ends of which will be compressed when subjected to force and will rebound after the force is lost; a core shaft 27 is also coaxially coupled to the top of the guide column 24, and the core shaft 27 is used to coaxially position the sleeve hole of the rear subframe and the bushing, and a bushing pin 28 is also provided above the core shaft 27, and the bushing pin 28 is used to limit the freedom of the lateral movement of the bushing. In order to realize the automatic alignment function, a core shaft 2 7 is also connected to the bottom of the compression spring 29, the bottom end of the compression spring 29 is connected to the support bottom ring 22; when installing the rear subframe of the automobile, if the bushing is tilted, the force will be transmitted from the core shaft 27 to the compression spring 29, causing the compression spring 29 to tilt to one side. At the same time, since the core shaft 27 and the guide column 24 are coaxially coupled, when the core shaft 27 is driven to deflect, the guide column 24 is synchronously driven to deflect. At this time, the guide column 24 will squeeze the guide column float 25 on the side of the deflection direction, causing the guide column float 25 to compress. When the core shaft 27 loses its After the force is applied, the compression spring 29 drives the core shaft 27 to reset under its own restoring force. At the same time, the guide post float 25 recovers synchronously after losing the extrusion force, pushing the guide post 24 back to its original position, thereby realizing automatic centering. The guide post float 25 is arranged along the circumference of the guide post 24. Therefore, after resetting, the guide post 24 will be restricted by the guide post float 25 and will be in the center position. This structure can avoid the situation where the rear subframe of the automobile cannot be positioned due to welding deformation, and may cause secondary deformation or even cracking of the rear subframe of the automobile when the bushing is pressed.

[0022] During press-fitting, the sleeve of the rear subframe of the automobile will abut against the guide post 24 . In order to prevent the guide post 24 from damaging the coating of the rear subframe of the automobile, a soft pad 26 is provided on the top of the guide post 24 to protect the coating of the sleeve.

[0023] In order to facilitate the movement of the tooling, four lifting rings 12 are provided around the tooling base plate 10 to facilitate lifting and replacement.

[0024] A pneumatic pre-pressing mechanism 11 is also provided in the middle of the tooling base plate 10 . When the rear sub-frame of the automobile is placed on the tooling base plate 10 , the pneumatic pre-pressing mechanism 11 can press it tightly to prevent the rear sub-frame of the automobile from being displaced during the movement.

[0025] The pressing clamp 30 is used to be placed above the sleeve after the rear subframe of the automobile is installed. The pressing clamp 30 adopts a contoured structure to increase the force-bearing surface of the bushing during the press-fitting operation and avoid deformation of the bushing during the press-fitting process.

[0026] In summary, the present application realizes the synchronous press-fitting of four bushings at the same time by setting four supporting and guiding mechanisms 20, thereby improving work efficiency. In addition, the four supporting and guiding mechanisms 20 can have a certain degree of floating freedom in both the lateral and axial directions. Effective pre-positioning can avoid the situation where the rear subframe of the automobile cannot be positioned due to welding deformation, and the rear subframe of the automobile may cause secondary deformation or even cracking when the bushing is pressed. It effectively improves the press-fitting accuracy of the bushing of the rear subframe of the automobile and reduces the defective rate of the product.

[0027] The present invention is not limited to what is described in the specification and implementation modes, and therefore additional advantages and modifications can be easily realized by those skilled in the art. Therefore, without departing from the spirit and scope of the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details, representative devices, and illustrated examples shown and described herein.

Claims

1. A multi-axis floating tooling for automobile rear subframe bushing, characterized in that: include: The tooling base plate is rectangularly distributed and is provided with four supporting and guiding mechanisms; each of the supporting and guiding mechanisms includes a positioning seat, the positioning seat is fixedly connected to the tooling base plate, a supporting bottom ring is coupled in the positioning seat, a plurality of bottom ring floats are embedded in the supporting bottom ring, the supporting bottom ring is floated on the tooling base plate through the bottom ring floats, the supporting bottom ring is also connected to a guide column, a plurality of guide column floats are embedded in the circumferential side of the guide column, the guide column can move in the positioning seat through the guide column float, the guide column is coaxially coupled with a core shaft, the top end of the core shaft is connected to a bushing pin, the bushing pin is used to limit the freedom of the bushing in the circumferential direction, the bottom of the core shaft is also connected to a compression spring, and the other end of the compression spring is connected to the supporting bottom ring.

2. The multi-axis floating tooling for automobile rear subframe bushing according to claim 1 is characterized in that: A soft cushion is also provided on the top of the guide post.

3. The multi-axis floating tooling for automobile rear subframe bushing according to claim 1 is characterized in that: The peripheral sides of the tooling bottom plate are all provided with hanging rings.

4. The multi-axis floating tooling for automobile rear subframe bushing according to claim 1 is characterized in that: Two pneumatic pre-pressing mechanisms are also provided at intervals in the middle of the tooling base plate.

5. The multi-axis floating tooling for automobile rear subframe bushing according to claim 1 is characterized in that: Also includes: Pressing pliers, which lift the bearing surface of the bushing during press-fitting.

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