Torsion beam bushing for axially limiting by coating plastic on inner core
By injection-molding a combination of a limit block and a rubber sleeve on the inner core of the torsion beam bushing, the weight and cost issues caused by the large-diameter limit plate are solved, achieving the effects of lightweighting and cost reduction.
Patent Information
- Application Number
- CN202423009125.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-12-06
AI Technical Summary
In traditional torsion beam bushings with large diameters, the size of the metal limit plates increases, resulting in increased weight and cost. In addition, the small-diameter metal inner core cannot forge large-diameter limit plates, posing a risk of material shortage.
The inner core is covered with plastic, and the limit block is formed by injection molding. Combined with the rubber sleeve and the outer tube, an axial limit structure is formed to reduce weight and meet large size requirements.
The axial limitation of the large-size torsion beam bushing is realized, while the cost is reduced and the lightweight effect is achieved.
Smart Images
Figure CN223384260U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile accessories, in particular to a torsion beam bushing with an inner core covered with plastic for axial limitation. Background Art
[0002] like Figure 1 As shown, the outer diameter of the traditional dog-stick torsion beam bushing 10 is generally small, and the axial limit plate 11 is forged directly on the inner core. In this case, cold forging can produce a smaller axial limit plate 11, but when the outer diameter of the bushing is larger, the required limit plate size will also be increased accordingly. To make a large-diameter metal limit plate, a large-diameter metal inner core must be used. At this time, the weight of the part will increase greatly, and the cost pressure is also very high. In order to achieve weight reduction, the diameter of the metal inner core cannot be too large, but a smaller diameter metal inner core cannot be forged into a larger metal limit plate. Even hot forging has the risk of material shortage, and it is impossible to forge a large-diameter limit plate on a small-diameter metal inner core. Summary of the Invention
[0003] In order to overcome the deficiencies of the prior art, the utility model provides a torsion beam bushing with an inner core covered with plastic for axial limitation.
[0004] To achieve the above purpose, a torsion beam bushing is designed, which is plastic-coated on the inner core for axial limitation. The bushing includes a metal inner core, two flat plates are provided at each end of the metal inner core, a limit block is sleeved on the outside of the metal inner core, parting surfaces are provided at both ends of the limit block, the outer end surface of the flat plate is flush with the parting surface, a rubber sleeve is sleeved on the outside of the limit block, and an outer tube is sleeved on the outside of the rubber sleeve.
[0005] A plurality of weight-reducing holes are provided on the parting surfaces at both ends of the limit block.
[0006] The outer wall of the limit block is provided with a plurality of protrusions, and the inner wall of the rubber sleeve is provided with a plurality of grooves matched with the protrusion structures.
[0007] The radial dimension of the plane plate is larger than the dimension of the mounting surface of the metal inner core.
[0008] The parting surface at one axial end of the limiting block extends outwards to form a disc-shaped parting surface.
[0009] The rubber sleeve and one axial end of the outer tube are provided with a mounting surface matched with the disc-shaped parting surface.
[0010] The limiting block is an integrally-molded structure.
[0011] Compared with the prior art, the utility model solves the axial limitation of the large-sized torsion beam bushing by using the limiting block of the injection-molded integrally formed structure, while reducing the cost and achieving lightweight. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a structural diagram of the present utility model.
[0013] Figure 2 This is an exploded view of the present invention.
[0014] Figure 3 This is a schematic structural diagram of the metal inner core of the present invention.
[0015] Figure 4 This is a schematic structural diagram of the limit block of the utility model.
[0016] Figure 5 This is a structural diagram of the limit block of the utility model from another perspective.
[0017] Figure 6 This is a schematic structural diagram of the rubber sleeve of the present invention.
[0018] Figure 7 It is a front view of the rubber sleeve of the utility model.
[0019] Figure 8 This is a schematic diagram of the structure of the metal inner core before improvement of the present invention. DETAILED DESCRIPTION
[0020] The present invention will be further described below with reference to the accompanying drawings.
[0021] like Figures 1 to 7 As shown, a flat plate 1-1 is provided at both ends of the metal inner core 1, a limit block 3 is sleeved on the outside of the metal inner core 1, and a parting surface 3-1 is provided at both ends of the limit block 3. The outer end surface of the flat plate 1-1 is flush with the parting surface 3-1, a rubber sleeve 4 is sleeved on the outside of the limit block 3, and an outer tube 5 is sleeved on the outside of the rubber sleeve 4.
[0022] A plurality of weight-reducing holes 3-2 are provided on the parting surfaces 3-1 at both ends of the limiting block 3 to reduce weight.
[0023] The outer wall of the limit block 3 is provided with a plurality of protrusions 3-3 to meet the stiffness requirements in different directions and improve the durability.
[0024] A plurality of grooves 4-1 are provided on the inner wall of the rubber sleeve 4 and match the protrusions 3-3.
[0025] The radial dimension of the flat plate 1-1 is larger than the dimension of the metal core mounting surface 1-2 so as to be used for sealing the injection mold and prevent the plastic from being pulled off and twisted in the axial direction.
[0026] The parting surface 3 - 1 at one axial end of the limiting block 3 extends outward to form a disc-shaped parting surface 3 - 1 , thereby increasing the diameter of the limiting block 3 to meet usage requirements.
[0027] One axial end of the rubber sleeve 4 and the outer tube 5 is provided with a mounting surface 2 that matches the disc-shaped parting surface 3-1.
[0028] The limiting block 3 is an integrally-molded structure.
[0029] During the manufacturing process of the present invention, two flat plates 1-1 are first forged on a metal inner core 1. The metal inner core 1 is then placed in an injection mold for injection molding to form a stopper 3 of an integrally-molded structure. The metal inner core 1, the stopper 3, and the outer tube 5 are then vulcanized and integrally molded together through a rubber sleeve 4 to form the bushing structure of the present invention.
[0030] During specific use, the structure of the injection mold is determined according to the required size and shape of the limit block 3 .
Claims
1. A torsion beam bushing with plastic coating on an inner core for axial positioning, comprising a metal inner core, characterized in that: The metal inner core (1) is provided with a flat plate (1-1) at both ends, a limit block (3) is sleeved on the outer side of the metal inner core (1), a parting surface (3-1) is provided at both ends of the limit block (3), the outer end surface of the flat plate (1-1) is flush with the parting surface (3-1), a rubber sleeve (4) is sleeved on the outer side of the limit block (3), and an outer tube (5) is sleeved on the outer side of the rubber sleeve (4).
2. A torsion beam bushing with plastic coating on the inner core for axial limitation according to claim 1, characterized in that: A plurality of weight-reducing holes (3-2) are provided on the parting surfaces (3-1) at both ends of the limit block (3).
3. The torsion beam bushing with plastic coating on the inner core for axial limitation according to claim 1, characterized in that: The outer wall of the limiting block (3) is provided with a plurality of protrusions (3-3).
4. A torsion beam bushing with plastic coating on the inner core for axial limitation according to claim 3, characterized in that: A plurality of grooves (4-1) matching the protrusion (3-3) structures are provided on the inner wall of the rubber sleeve (4).
5. The torsion beam bushing with plastic coating on the inner core for axial limitation according to claim 1, characterized in that: The radial dimension of the plane plate (1-1) is greater than the dimension of the metal inner core mounting surface (1-2).
6. The torsion beam bushing with plastic coating on the inner core for axial limitation according to claim 1, characterized in that: The parting surface (3-1) at one axial end of the limit block (3) extends outwards to form a disc-shaped parting surface (3-1).
7. A torsion beam bushing with plastic coating on the inner core for axial limitation according to claim 6, characterized in that: One axial end of the rubber sleeve (4) and the outer tube (5) is provided with a mounting surface (2) that matches the disc-shaped parting surface (3-1).
8. The torsion beam bushing with plastic coating on the inner core for axial limitation according to claim 1, characterized in that: The limiting block (3) is an integrally-molded structure.