Lightweight thrust rod spherical hinge rubber device
By designing the stepped axial cavity and exhaust hole of the ball core in the thrust rod ball hinge rubber, and combining it with the rubber body with high temperature vulcanization, the problems of heavy duty and wall thickness of the ball core are solved, and weight reduction and performance improvement are achieved , improves safety and economicality.
Patent Information
- Application Number
- CN202421220553.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-30
AI Technical Summary
The heavy-duty ball core in existing thrust rod ball hinge rubber causes large energy consumption, and it is difficult to ensure wall thickness during lightweight design, which is prone to cracks and fractures, affecting performance and safety.
Design a lightweight thrust rod ball hinge rubber device including a ball core, a rubber body, an end cover and an outer sleeve. The ball core is equipped with a stepped shaft cavity and exhaust hole, and is bonded to the rubber body through a high-temperature vulcanization process. The outer sleeve secures the end cap to avoid stress concentration and reduce weight.
The weight reduction of ball hinge rubber is achieved by 35%, maintaining the stiffness and safety of the original structure, reducing maintenance costs, and improving the driving performance and economy of the car.
Smart Images
Figure CN222254677U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a thrust rod ball joint, in particular to a lightweight thrust rod ball joint rubber device. Background Art
[0002] In modern thrust rod ball joint mechanisms, superelastic rubber materials are used, which play a core role in multiple functions such as transmitting force, limiting movement and isolating vibration. The use of this structure and material is not only directly related to the vehicle's power performance and handling stability, but also has an extremely important impact on the vehicle's safety. However, due to the extremely harsh road conditions and operating environment faced by heavy-duty commercial vehicles during driving, the rubber material in the thrust rod ball joint rubber may crack and the rigid components may break, which will not only increase the vehicle's maintenance costs, but may also pose a serious threat to the driver's safety; at the same time, this will also cause huge economic and reputation losses to manufacturers and vehicle manufacturers.
[0003] The solid ball core in the existing thrust rod ball joint rubber has a large weight, which causes a large energy consumption during the operation of the car. Most of the current lightweight designs change the shape of the ball core, but this increases the manufacturing cost and reduces its force transmission performance; for lightweight designs with the same wall thickness, due to the complex internal shape of the ball core, it is difficult to ensure the wall thickness during the casting process, resulting in a small wall thickness in some areas, and cracks are prone to occur in the thin-walled area, which affects the performance of the ball joint rubber. In severe cases, the ball core will break directly during operation, causing serious consequences. Summary of the invention
[0004] In order to further reduce the weight of the ball joint rubber while ensuring the overall structural strength and the original appearance, the utility model provides a lightweight thrust rod ball joint rubber device.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A lightweight thrust rod ball joint rubber device, comprising a ball core, a rubber body, an end cover and an outer sleeve, wherein the rubber body surrounds the middle outer wall of the ball core to reduce external vibration and serve as a medium for transmitting torque, the end cover is arranged on the left and right sides of the rubber body to limit the left and right position movement of the rubber body, the outer sleeve surrounds the outer wall of the rubber body, and the end cover is fixed to both ends of the outer sleeve;
[0007] The core is provided with a cavity for reducing the weight of the core, the cavity is provided with an exhaust hole for discharging parting sand, the edge of the cavity is provided with a plurality of fillets for avoiding stress concentration, annular grooves for enhancing the adhesion between the core and the rubber body are symmetrically provided at both axial ends of the core, connecting holes for connecting the device to the automobile suspension are symmetrically provided near both ends of the core laterally, and right-angle chamfers are symmetrically provided on both sides of the connecting hole for facilitating the disassembly and assembly of the internal parts of the connecting hole.
[0008] Furthermore, the cavity is in the shape of a stepped shaft, and the cavity is located at the center of the core and is symmetrically arranged in the transverse and axial directions about the center.
[0009] Furthermore, the exhaust hole is arranged at the center of the cavity and is radially penetrated through the core.
[0010] Furthermore, the ball core, the rubber body and the end cover are bonded together as one body through a high-temperature vulcanization process.
[0011] Furthermore, both ends of the outer sleeve are respectively provided with a limiting boss and a retaining spring groove for fixing the end cover.
[0012] Furthermore, the inner surface of the outer sleeve is interference-fitted with the outer surface of the rubber body, and the inner surface of the outer sleeve is clearance-fitted with the outer surface of the end cover.
[0013] Compared with the prior art, the utility model has the following beneficial effects:
[0014] The utility model performs lightweight design on the thrust rod rubber on the basis of basically not changing the original shape of the ball core, reduces the weight of the ball core in the thrust rod ball joint rubber, and avoids stress concentration by arranging a stepped shaft-shaped cavity inside the ball core and arranging a plurality of fillets at positions where the cavity diameter changes. The exhaust holes are arranged according to the casting process of the hollow parts, so that the thrust rod ball joint rubber is reduced in weight by 35%. On the basis of the weight reduction, the stress condition of the ball joint rubber does not change significantly, and is close to the stiffness characteristics of the original structure. At this time, the maximum working stress of the ball core is consistent with the working stress of the original ball core, does not change significantly, and there is no stress concentration inside the cavity.
[0015] The utility model sets the ball core cavity into a stepped shaft shape, so that the thickness of the cavity fillet transition position area is relatively large, which can avoid cracks, reduce the weight while also ensuring the strength of the ball joint rubber, greatly improving its safety, thereby improving the driving performance of the car and having good economy.
[0016] The utility model sets the ball core in the thrust rod ball joint rubber as a hollow structure, which not only meets the thrust rod ball joint rubber bearing requirements, but also optimizes the ball joint rubber structure, reduces its weight and installation and maintenance costs, and conforms to the trend of product lightweight and structural optimization. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 Shows a schematic diagram of the structure of the utility model;
[0018] Figure 2 Shows Figure 1 A partial front cross-sectional view;
[0019] Figure 3 Shows Figure 1 A front cross-sectional view of the middle ball core;
[0020] Figure 4 Shows Figure 1 A schematic diagram of the structure of the middle and outer sleeves;
[0021] Figure 5 Shows Figure 1 Schematic diagram of the structure of the middle rubber body;
[0022] Figure 6 Shows Figure 1 Structural schematic diagram of the middle end cover;
[0023] In the figure: 1, ball core, 1-1, cylindrical cavity, 1-2, exhaust hole, 1-3, fillet, 1-4, annular groove, 1-5, connecting hole, 1-6, right-angle chamfer,
[0024] 2. Rubber body, 2-1. Outer surface of rubber body, 3. End cap, 3-1. Outer surface of end cap,
[0025] 4. Outer sleeve, 4-1. Limiting boss, 4-2. Retaining spring groove, 4-3. Inner surface of outer sleeve. DETAILED DESCRIPTION
[0026] The present invention will be further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.
[0027] like Figure 1-Figure 2 As shown, a lightweight thrust rod ball joint rubber device includes a ball core 1, a rubber body 2, an end cover 3 and an outer sleeve 4. The rubber body 2 surrounds the middle outer wall of the ball core 1 to reduce external vibration and serve as a medium for transmitting torque. The end cover 3 is arranged on the left and right sides of the rubber body 2 to limit the left and right position movement of the rubber body 2. The outer sleeve 4 surrounds the outer wall of the rubber body 2, and the end cover 3 is fixed to both ends of the outer sleeve 4.
[0028] The core 1 and the end cap 3 are both made of metal, and the core 1, the rubber body 2 and the end cap 3 are bonded together through a high-temperature vulcanization process. The contact surfaces of the rubber body 2 and the end cap 3 are consistent in shape and size, making the vulcanization fixation tighter.
[0029] like Figure 3 As shown, a cavity 1-1 for reducing the weight of the core 1 is provided in the core 1, and the cavity 1-1 is in the shape of a stepped shaft. The cavity 1-1 is provided at the center of the core 1 and is symmetrical about the center in the transverse and axial directions. The diameters of the cavity 1-1 are 18 mm, 40 mm and 18 mm from left to right, and the axial lengths are 30 mm, 20 mm and 30 mm, respectively. An exhaust hole 1-2 for discharging parting sand is provided in the cavity 1-1 to facilitate the discharge of parting sand during casting. The exhaust hole 1-2 is provided at the center of the cavity 1-1 and is radially through the core 1. The diameter of the exhaust hole 1-2 is 8 mm. The fillet 1-3 is provided at the step transition section of the cavity 1-1 and at the edge of the cavity 1-1 to avoid stress concentration and reduce weight. The thicknesses of the fillet 1-3 are 3 mm and 6 mm, respectively.
[0030] This embodiment does not substantially change the original shape of the core 1, but performs a lightweight design on it. A stepped shaft-shaped cavity 1-1 is provided inside the core 1 to reduce the weight of the core 1, and a fillet 1-3 is provided at the position where the diameter of the cavity 1-1 changes to avoid stress concentration. Exhaust holes 1-2 are provided in accordance with the casting process of hollow parts. By performing a lightweight design on the core 1, the weight of the core 1 is reduced by 35%. At this time, the working stress of the core 1 is only 68.9 MPa, and there is no stress concentration inside the cavity 1-1.
[0031] Furthermore, on the surface of the ball core 1 vulcanized with the rubber body 2, annular grooves 1-4 are symmetrically provided at the axial ends of the ball core 1 about its center, which are used to enhance the adhesion between the ball core 1 and the rubber body 2 and avoid rubber extrusion. The ball core 1 is symmetrically provided with connecting holes 1-5 for connecting the device to the automobile suspension at both ends, so that it can transmit the torque transmitted by the automobile suspension during the forming process. The diameter of the connecting hole 1-5 is 25mm, and the length from the center of the connecting hole 1-5 to the axial edge is 22.5mm, and the length from the radial edge is 19mm. The two sides of the connecting hole 1-5 are symmetrically provided with right-angle chamfers 1-6 with a length of 1mm for facilitating the disassembly and assembly of the internal parts of the connecting hole 1-5.
[0032] like Figure 4As shown, both ends of the outer sleeve 4 are respectively provided with a limiting boss 4-1 and a retaining spring groove 4-2 for fixing the end cover 3. The limiting boss 4-1 is arranged at the left end of the outer sleeve 4, and the limiting boss 4-1 has a thickness of 10 mm and is used to fix the end cover 3 on the left side. The retaining spring groove 4-2 is arranged at the right end of the outer sleeve 4, and the distance between the retaining spring groove 4-2 and the right edge is 5 mm. The retaining spring groove 4-2 has a width of 2 mm and a depth of 3 mm. It is used to install the retaining spring to fix the end cover 3 on the right side, and is convenient for maintenance and replacement of internal parts.
[0033] like Figure 5-Figure 6 As shown, the inner surface 4 - 3 of the outer sleeve 4 and the outer surface 2 - 1 of the rubber body 2 are interference fit, and the inner surface 4 - 3 of the outer sleeve 4 and the outer surface 3 - 1 of the end cover 3 are clearance fit.
Claims
1. A lightweight thrust rod ball joint rubber device, characterized in that: It comprises a ball core (1), a rubber body (2), an end cover (3) and an outer sleeve (4); The rubber body (2) surrounds the middle outer wall of the ball core (1) and is used to reduce external vibration and serve as a medium for transmitting torque. The end caps (3) are arranged on the left and right sides of the rubber body (2) and are used to limit the left and right position movement of the rubber body (2). The outer sleeve (4) surrounds the outer wall of the rubber body (2), and the end caps (3) are fixed to both ends of the outer sleeve (4). The core (1) is provided with a cavity (1-1) for reducing the weight of the core (1), the cavity (1-1) is provided with an exhaust hole (1-2) for discharging parting sand, the edge of the cavity (1-1) is provided with a plurality of fillets (1-3) for avoiding stress concentration, annular grooves (1-4) for enhancing the bonding force between the core (1) and the rubber body (2) are symmetrically provided at both axial ends of the core (1), connecting holes (1-5) for connecting the device to a vehicle suspension are symmetrically provided near both ends of the core (1) in the transverse direction, and right-angle chamfers (1-6) are symmetrically provided on both sides of the connecting hole (1-5) for facilitating the disassembly and assembly of parts inside the connecting hole (1-5).
2. A lightweight thrust rod ball joint rubber device as claimed in claim 1, characterized in that: The cavity (1-1) is in the shape of a stepped shaft, and the cavity (1-1) is arranged at the center of the ball core (1) and is symmetrically arranged in the transverse direction and in the axial direction with respect to the center.
3. A lightweight thrust rod ball joint rubber device as claimed in claim 2, characterized in that: The exhaust hole (1-2) is arranged at the center of the cavity (1-1) and is radially penetrated along the core (1).
4. A lightweight thrust rod ball joint rubber device as claimed in claim 3, characterized in that: The ball core (1), the rubber body (2) and the end cover (3) are bonded together as a whole through a high-temperature vulcanization process.
5. A lightweight thrust rod ball joint rubber device according to any one of claims 1 to 4, characterized in that: The two ends of the outer sleeve (4) are respectively provided with a limiting boss (4-1) and a retaining spring retaining groove (4-2) for fixing the end cover (3).
6. A lightweight thrust rod ball joint rubber device according to any one of claims 1 to 4, characterized in that: The inner surface (4-3) of the outer sleeve (4) is interference-fitted with the outer surface (2-1) of the rubber body (2), and the inner surface (4-3) of the outer sleeve (4) is clearance-fitted with the outer surface (3-1) of the end cover (3).