A rear wheel hub support bushing press-in tool

Abstract

The utility model relates to a rear wheel hub support bushing press into frock, including frock bottom plate, two riser plates of fixed mounting on frock bottom plate, with two riser plates fixed connection's base plate and install in the floating positioning mandrel structure of base plate, the floating positioning mandrel structure includes floating pin, the upper end of floating pin is equipped with rubber lower avoidance slot, the floating pin has the mandrel fixedly installed coaxially upwards, the lower end of floating pin is provided with pin groove, the base plate is equipped with the let -by slot, and the pin groove is opposite let -by slot setting, one end of first compression spring is fixed in the pin groove, and the other end of first compression spring is fixedly installed in the let -by slot, the base is installed with floating pin limiting structure, the utility model has the advantages of simple structure, accurate positioning, strong protection type.

Description

Technical Field

[0001] This utility model relates to the field of pressing-in technology of multi-link rear suspension wheel hub bracket bushings for automobiles, and in particular to a tooling for pressing-in rear wheel hub bracket bushings. Background Technology

[0002] In the vehicle manufacturing industry, the production and assembly of rear wheel hub brackets is crucial. As a key component of the automotive suspension system, the rear wheel hub bracket is closely connected to various links, bearings, wheel hubs, and brake assemblies. It not only bears the load of the rear of the vehicle but also shoulders the important responsibility of supporting and driving the wheel hub's rotation, ensuring the vehicle's normal operation. Its performance directly affects the safety and stability of the vehicle, especially during driving, when the rear wheel hub bracket must withstand complex and varied impacts and fatigue loads, placing extremely high demands on its strength, fatigue life, stiffness, and other mechanical properties.

[0003] Pressing in the bushings is a crucial step in assembling the rear wheel hub bracket. Currently, several challenging problems are frequently encountered during the bushing press-in process:

[0004] (i) Traditional tooling has design deficiencies, lacking effective limiting and guiding devices. This makes the bushing very prone to deformation when it is pressed in. Once deformed, it will not only affect the bushing's own sealing and wear protection functions, but may also cause deviations in the subsequent fit with other components, reducing the assembly accuracy and stability of the entire rear wheel hub bracket;

[0005] (ii) Inadequate bushing pressing. This will prevent the bushing from fulfilling its intended function, and during vehicle operation, uneven force may cause it to loosen or fall off, creating a dangerous situation.

[0006] (iii) The existing tooling design does not fully consider the protection of the bushing rubber. During the pressing process, the bushing rubber is often damaged. The damage to the rubber will not only weaken the cushioning and shock absorption effect of the bushing, but may also expose the internal metal parts directly, accelerate wear, and seriously affect the service life of the rear wheel hub bracket and the driving comfort of the vehicle.

[0007] (iv) Existing tooling makes it difficult to ensure the balance and accuracy of the wheel hub bracket when positioning it. The lack of reasonable support points on the blank shape makes the wheel hub bracket prone to shaking and displacement during the press-fitting process. The lack of a precise positioning device at the bushing hole causes the bushing to be skewed when pressed in, which further aggravates the defects such as bushing deformation and incomplete pressing in. At the same time, it also greatly reduces the pressing efficiency and increases production and time costs.

[0008] Therefore, there is an urgent need to develop a new rear wheel hub bracket bushing press-in tool to enable the bushing to be pressed in without deformation and without damage to the rubber, while significantly improving the pressing efficiency and meeting the urgent needs of the automotive manufacturing industry for high-quality and high-efficiency production. Summary of the Invention

[0009] In view of the shortcomings of the prior art, the technical problem to be solved by this patent application is how to provide a rear wheel hub bracket bushing press-in tooling that is simple in structure, accurate in positioning, and strong in protection.

[0010] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0011] A rear wheel hub bracket bushing press-fit fixture includes a fixture base plate, two upright plates fixedly mounted on the fixture base plate, a base plate fixedly connected to the two upright plates, and a floating positioning mandrel structure mounted on the base plate. The floating positioning mandrel structure includes a floating pin, the upper end of which is provided with a rubber lower clearance groove, a mandrel fixedly mounted coaxially upward on the floating pin, a pin groove provided at the lower end of the floating pin, a clearance groove provided on the base plate, the pin groove being positioned opposite the clearance groove, one end of a first compression spring being fixed in the pin groove, the other end of the first compression spring being fixedly mounted in the clearance groove, and a floating pin limiting structure being mounted on the base.

[0012] In this way, a stable basic frame is formed by the tooling base plate, upright plate, and base plate, providing a reliable mounting carrier for the floating positioning mandrel structure. In the floating positioning mandrel structure, the floating pin, in conjunction with the first compression spring, forms a floating support. The floating pin is limited by a floating pin limiting structure to prevent it from detaching. During the bushing press-fitting process, the bushing hole of the wheel hub bracket is fitted onto the outside of the floating pin. The wheel hub bracket is positioned by the floating pin, and the bushing is placed on the floating pin. The mandrel is used to position the bushing. A rubber clearance groove is provided to allow space for the lower end of the bushing's rubber. Then, the press head applies pressure to the bushing. During the press-fitting process, the first compression spring is compressed and shortened, and the floating pin moves downward until the bushing is pressed into the bushing hole. After press-fitting is completed, the wheel hub bracket is removed, and the first compression spring drives the floating pin to move upward, achieving a reset for future use. The mandrel positions the bushing, and the floating pin positions the hub bracket, preventing misalignment during pressing. The rubber clearance groove provides pre-emptive protection for the bushing's rubber portion, reducing frictional damage during initial pressing. The floating pin limiting structure constrains the floating range, preventing excessive displacement from affecting positioning accuracy. The overall structure works synergistically to address bushing deformation, incomplete pressing, and rubber damage from multiple dimensions, including positioning, support, and clearance, while simultaneously improving pressing efficiency.

[0013] As an optimization, the floating pin limiting structure includes a limiting cylinder, the upper end of which protrudes inward and is provided with a limiting ring, the floating pin slidingly engaging with the limiting ring, the lower end of which protrudes outward and is provided with an outer edge, the outer edge being directly opposite the limiting ring and slidingly engaging with the limiting cylinder, the limiting cylinder being fixedly mounted on the substrate.

[0014] In this way, the limiting ring of the limiting cylinder and the outer edge of the floating pin form a sliding fit and limiting relationship. This allows the floating pin to achieve adaptive floating within a certain range, meeting the flexibility requirements of positioning and support. At the same time, the fit between the limiting ring and the outer edge limits its maximum floating stroke, avoiding spindle positioning deviation due to excessive floating amount. This ensures the stability and reliability of the floating positioning function and extends the service life of the tooling.

[0015] As an optimization, the limiting cylinder has an outwardly protruding mounting platform, which is positioned directly opposite the substrate and is fixedly connected to the substrate by screws.

[0016] In this way, the limiting cylinder is fixed to the base plate through the structural design with mounting platform and screw connection, which not only enhances the firmness of the limiting cylinder installation and avoids loosening and displacement during press-fitting, but also facilitates the disassembly, assembly, maintenance and replacement of the limiting cylinder; the close fit design between the mounting platform and the base plate increases the contact area, disperses the force, and further ensures the stability of the limiting structure, providing a reliable foundation for the precise limiting of the floating pin.

[0017] As an optimization, a support plate is fixedly installed between the tooling base plate and the substrate.

[0018] In this way, the support plate between the tooling base plate and the base plate can enhance the connection rigidity between the two, reduce the structural deformation caused by the force during the pressing process, and prevent the positioning accuracy of the floating positioning mandrel from being affected by the deflection of the base plate. At the same time, the support plate can distribute the pressing force borne by the tooling as a whole, improve the load-bearing capacity of the tooling, ensure the structural stability during long-term use, and indirectly ensure the consistency of bushing pressing quality.

[0019] As an optimization, the support plate is provided with a through hole, and a support rod is slidably fitted inside the through hole. One end of the support rod is fixed with a support head, and the other end of the support rod is provided with an external thread and connected to a limit block through the thread. A second compression spring is sleeved on the support rod, and the two ends of the second compression spring abut against the support plate and the support head.

[0020] In this way, the support rod and support head on the support plate, together with the second compression spring, form an independent floating support assembly. The support head can adaptively adjust the contact position and force according to the shape of the wheel hub bracket blank, forming a multi-point collaborative support with the floating positioning mandrel structure, further improving the balance of the wheel hub bracket. The buffering effect of the second compression spring can absorb the vibration during the pressing process and reduce workpiece sway. The limiting block can limit the maximum extension of the support rod, avoiding excessive support that could lead to workpiece positioning deviation, while also protecting the second compression spring. This structure can adapt to the support requirements of blanks of different specifications, improving the versatility of the tooling.

[0021] As an optimization, a pressure head is also included, which has a rubber clearance groove and a pressure plate for pressing the bushing.

[0022] In this way, the pressure table of the pressure head contacts the bushing. During pressing, the pressure table presses down on the bushing to ensure that the bushing is pressed into place, while also ensuring accurate bushing positioning and high pressing precision. The upper clearance groove of the rubber and the lower clearance groove of the floating pin form a corresponding clearance space, protecting the rubber part of the bushing throughout the pressing process and preventing the pressure head from directly contacting the rubber and causing damage. The cooperation between the pressure head and the floating positioning mandrel enables axial transmission of pressing force, reduces radial force, further prevents bushing deformation, and improves pressing quality.

[0023] In summary, a floating positioning mandrel structure is used to position the wheel hub bracket and bushing, preventing misalignment during bushing pressing. The support head and the second compression spring work together to ensure the balance of the wheel hub bracket. A pressure plate is designed on the pressure head to ensure the bushing pressing dimension and the clearance groove on the rubber, preventing the bushing from being pressed in place or the rubber from being damaged. These designs ensure that the bushing is free from deformation, pressed in properly, and that the bushing rubber is undamaged. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a rear wheel hub bracket bushing press-in tool according to the present invention.

[0025] Figure 2 for Figure 1 A sectional view.

[0026] Figure 3 This is a schematic diagram of the floating positioning mandrel and pressure head.

[0027] Figure 4 for Figure 3 A sectional view.

[0028] Figure 5 This is a schematic diagram showing the interaction between the floating pin and the limiting cylinder. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings. In the description of the present invention, it should be understood that directional terms such as "upper," "lower," "top," and "bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of the present invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0030] like Figure 1-5 As shown, a rear wheel hub bracket bushing pressing fixture includes a fixture base plate 1, two upright plates 11 fixedly mounted on the fixture base plate, a base plate 12 fixedly connected to the two upright plates, and a floating positioning mandrel structure mounted on the base plate. The floating positioning mandrel structure includes a floating pin 13, the upper end of which is provided with a rubber lower clearance groove 14, a mandrel 15 fixedly mounted coaxially upward on the floating pin, a pin groove 16 provided at the lower end of the floating pin, a clearance groove 17 provided on the base plate, the pin groove being positioned opposite the clearance groove, one end of a first compression spring 18 being fixed in the pin groove, and the other end of the first compression spring being fixedly mounted in the clearance groove. A floating pin limiting structure is installed on the base.

[0031] In this way, a stable basic frame is formed by the tooling base plate, upright plate, and base plate, providing a reliable mounting carrier for the floating positioning mandrel structure. In the floating positioning mandrel structure, the floating pin, in conjunction with the first compression spring, forms a floating support. The floating pin is limited by a floating pin limiting structure to prevent it from detaching. During the bushing press-fitting process, the bushing hole of the wheel hub bracket is fitted onto the outside of the floating pin. The wheel hub bracket is positioned by the floating pin, and the bushing is placed on the floating pin. The mandrel is used to position the bushing. A rubber clearance groove is provided to allow space for the lower end of the bushing's rubber. Then, the press head applies pressure to the bushing. During the press-fitting process, the first compression spring is compressed and shortened, and the floating pin moves downward until the bushing is pressed into the bushing hole. After press-fitting is completed, the wheel hub bracket is removed, and the first compression spring drives the floating pin to move upward, achieving a reset for future use. The mandrel positions the bushing, and the floating pin positions the hub bracket, preventing misalignment during pressing. The rubber clearance groove provides pre-emptive protection for the bushing's rubber portion, reducing frictional damage during initial pressing. The floating pin limiting structure constrains the floating range, preventing excessive displacement from affecting positioning accuracy. The overall structure works synergistically to address bushing deformation, incomplete pressing, and rubber damage from multiple dimensions, including positioning, support, and clearance, while simultaneously improving pressing efficiency.

[0032] In this embodiment, the floating pin limiting structure includes a limiting cylinder 19. The upper end of the limiting cylinder protrudes inward and is provided with a limiting ring 2. The floating pin slides with the limiting ring. The lower end of the floating pin protrudes outward and is provided with an outer edge 21. The outer edge is directly opposite the limiting ring and slides with the limiting cylinder. The limiting cylinder is fixedly installed on the substrate.

[0033] In this way, the limiting ring of the limiting cylinder and the outer edge of the floating pin form a sliding fit and limiting relationship. This allows the floating pin to achieve adaptive floating within a certain range, meeting the flexibility requirements of positioning and support. At the same time, the fit between the limiting ring and the outer edge limits its maximum floating stroke, avoiding spindle positioning deviation due to excessive floating amount. This ensures the stability and reliability of the floating positioning function and extends the service life of the tooling.

[0034] In this embodiment, the limiting cylinder has an outwardly protruding mounting platform 22, which is positioned directly opposite the substrate and is fixedly connected to the substrate by screws.

[0035] In this way, the limiting cylinder is fixed to the base plate through the structural design with mounting platform and screw connection, which not only enhances the firmness of the limiting cylinder installation and avoids loosening and displacement during press-fitting, but also facilitates the disassembly, assembly, maintenance and replacement of the limiting cylinder; the close fit design between the mounting platform and the base plate increases the contact area, disperses the force, and further ensures the stability of the limiting structure, providing a reliable foundation for the precise limiting of the floating pin.

[0036] In this embodiment, a support plate 23 is fixedly installed between the tooling base plate and the substrate.

[0037] In this way, the support plate between the tooling base plate and the base plate can enhance the connection rigidity between the two, reduce the structural deformation caused by the force during the pressing process, and prevent the positioning accuracy of the floating positioning mandrel from being affected by the deflection of the base plate. At the same time, the support plate can distribute the pressing force borne by the tooling as a whole, improve the load-bearing capacity of the tooling, ensure the structural stability during long-term use, and indirectly ensure the consistency of bushing pressing quality.

[0038] In this embodiment, the support plate is provided with a through hole, and a support rod 24 is slidably fitted in the through hole. One end of the support rod is fixed with a support head 25, and the other end of the support rod is provided with an external thread and connected to a limit block through the thread. A second compression spring 26 is sleeved on the support rod, and the two ends of the second compression spring abut against the support plate and the support head.

[0039] In this way, the support rod and support head on the support plate, together with the second compression spring, form an independent floating support assembly. The support head can adaptively adjust the contact position and force according to the shape of the wheel hub bracket blank, forming a multi-point collaborative support with the floating positioning mandrel structure, further improving the balance of the wheel hub bracket. The buffering effect of the second compression spring can absorb the vibration during the pressing process and reduce workpiece sway. The limiting block can limit the maximum extension of the support rod, avoiding excessive support that could lead to workpiece positioning deviation, while also protecting the second compression spring. This structure can adapt to the support requirements of blanks of different specifications, improving the versatility of the tooling.

[0040] In this embodiment, a pressure head 27 is also included, which is provided with a rubber upper clearance groove 28 and a pressure table 29 for pressing the bushing.

[0041] In this way, the pressure table of the pressure head contacts the bushing. During pressing, the pressure table presses down on the bushing to ensure that the bushing is pressed into place, while also ensuring accurate bushing positioning and high pressing precision. The upper clearance groove of the rubber and the lower clearance groove of the floating pin form a corresponding clearance space, protecting the rubber part of the bushing throughout the pressing process and preventing the pressure head from directly contacting the rubber and causing damage. The cooperation between the pressure head and the floating positioning mandrel enables axial transmission of pressing force, reduces radial force, further prevents bushing deformation, and improves pressing quality.

[0042] In summary, a floating positioning mandrel structure is used to position the wheel hub bracket and bushing, preventing misalignment during bushing pressing. The support head and the second compression spring work together to ensure the balance of the wheel hub bracket. A pressure plate is designed on the pressure head to ensure the bushing pressing dimension and the clearance groove on the rubber, preventing the bushing from being pressed in place or the rubber from being damaged. These designs ensure that the bushing is free from deformation, pressed in properly, and that the bushing rubber is undamaged.

[0043] Finally, it should be noted that those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A rear wheel hub carrier bushing press-in tool characterized by, It includes a tooling base plate, two upright plates fixedly mounted on the tooling base plate, a base plate fixedly connected to the two upright plates, and a floating positioning mandrel structure mounted on the base plate. The floating positioning mandrel structure includes a floating pin, the upper end of which is provided with a rubber lower clearance groove, the mandrel is fixedly mounted on the floating pin coaxially upward, the lower end of which is provided with a pin groove, the base plate is provided with a clearance groove, the pin groove is set opposite to the clearance groove, one end of the first compression spring is fixed in the pin groove, the other end of the first compression spring is fixedly installed in the clearance groove, and a floating pin limiting structure is installed on the base plate.

2. The rear hub carrier bushing press-in tool according to claim 1, characterized in that The floating pin limiting structure includes a limiting cylinder, with a limiting ring protruding inward from the upper end of the limiting cylinder. The floating pin slides in cooperation with the limiting ring. The lower end of the floating pin protrudes outward from the limiting ring, with the outer edge facing the limiting ring and sliding in cooperation with the limiting cylinder. The limiting cylinder is fixedly mounted on the substrate.

3. The rear hub carrier bushing press-in tool according to claim 2, characterized in that The limiting cylinder has an outwardly protruding mounting platform, which is positioned directly opposite the substrate and is fixedly connected to the substrate by screws.

4. The rear wheel hub bracket bushing press-in tooling according to claim 1, characterized in that, A support plate is fixedly installed between the tooling base plate and the substrate.

5. The rear wheel hub bracket bushing press-in tooling according to claim 4, characterized in that, The support plate has a through hole, and a support rod is slidably fitted inside the through hole. One end of the support rod is fixed with a support head, and the other end of the support rod is provided with an external thread and connected to a limit block through the thread. A second compression spring is sleeved on the support rod, and the two ends of the second compression spring abut against the support plate and the support head.

6. The rear wheel hub bracket bushing press-in tooling according to claim 1, characterized in that, It also includes a pressure head, which has a rubber clearance groove and a pressure plate for pressing the bushing.

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