Integral injection molding shock absorber upper support embedded with pre-compression damping element

Abstract

The utility model discloses an integrally injection-molded shock absorber upper support embedded with a pre-compression damping element. The integrally injection-molded shock absorber upper support comprises a shell; the upper cavity is arranged at the upper end of the interior of the shell; the lower cavity is arranged at the lower end of the interior of the shell; the upper end of the vibration isolation element is arranged in the upper cavity and abuts against the inner surface of the upper cavity, the lower end of the vibration isolation element is arranged in the lower cavity and abuts against the inner surface of the lower cavity, and the vibration isolation element is connected with the upper cavity and the lower cavity; and the partition plate is arranged in the vibration isolation element. Through the application of the utility model, the utility model provides the integrally injection-molded shock absorber upper support embedded with the pre-compression damping element; the problems that an upper support of a welding plastic shock absorber widely used at present is prone to being insufficient in structural strength, product performance fluctuates along with the welding state, noise is caused, the durability of an inner core is reduced, and production and quality control equipment is expensive are solved.

Description

Technical Field

[0001] This utility model relates to the field of shock absorber upper support technology for automobiles, and in particular to an integral injection-molded shock absorber upper support with embedded pre-compression damping elements. Background Technology

[0002] In the current market, plastic shock absorber upper supports typically employ a plastic shell design with an open top. The pre-compressed damping element assembly is located within the shell cavity and is tightly connected to the plastic top cover via ultrasonic welding or laser welding. However, this structure has significant drawbacks: First, regardless of whether ultrasonic or laser welding is used, the influence of the reinforcing material in the plastic makes it difficult to ensure perfect fusion between the reinforcing material and the body on the weld surface of the shell and end cover during the welding process. This leads to a certain risk in the structural strength of the shock absorber upper support. Second, the plastic welding process itself has significant variability, making it impossible to guarantee the stability of the welding height and weld surface strength between the upper support shell and the end cover. Small welding defects may cause changes in the axial stiffness characteristics of the parts, thus affecting the performance stability of the shock absorber upper support and potentially causing noise problems. Finally, improving the welding quality between the plastic upper support shell and the plastic end cover requires very complex production and quality control equipment, which not only increases production costs but also results in relatively low production efficiency. Utility Model Content

[0003] In view of this, in order to solve the above problems, the purpose of this utility model is to provide an integrated injection-molded shock absorber upper support with embedded pre-compression damping elements, comprising:

[0004] case;

[0005] An upper cavity is disposed at the upper end of the interior of the housing, and the outer surface of the upper cavity is connected to the housing;

[0006] A lower cavity is disposed at the lower end of the interior of the housing, and the outer surface of the lower cavity is connected to the housing;

[0007] A vibration isolation element, wherein the upper end of the vibration isolation element is disposed in the upper cavity and abuts against the inner surface of the upper cavity, and the lower end of the vibration isolation element is disposed in the lower cavity and abuts against the inner surface of the lower cavity, and the vibration isolation element connects the upper cavity and the lower cavity;

[0008] A partition is disposed within the vibration isolation element.

[0009] In another preferred embodiment, the inner edge of the vibration isolation element is provided with an annular groove, and the partition plate is disposed in the annular groove and abuts against the vibration isolation element.

[0010] In another preferred embodiment, both the vibration isolation element and the partition plate are arranged in a circular shape. The vibration isolation element has a first mounting hole through it, and the partition plate has a second mounting hole through it. One end of the shock absorber connecting rod can pass through the first mounting hole and the second mounting hole.

[0011] In another preferred embodiment, the housing is provided with fixing holes on both sides, and bolts are installed in the fixing holes. The housing is connected to the car body or frame by the bolts.

[0012] In another preferred embodiment, the upper cavity includes a first part and a second part, wherein the lower end of the first part is connected to the upper end of the second part.

[0013] In another preferred embodiment, the lower cavity includes a third part and a fourth part, wherein the lower end of the third part is connected to the upper end of the fourth part.

[0014] In another preferred embodiment, the upper surface of the second part is planar, and the upper surface of the third part is planar.

[0015] In another preferred embodiment, the upper surface of the second part is wavy, the upper end of the first part is provided with a first positioning groove, the lower surface of the third part is wavy, and the lower end of the fourth part is provided with a second positioning groove.

[0016] In another preferred embodiment, the upper end of the vibration isolation element abuts against the inner surface of the second portion, and the lower end of the vibration isolation element abuts against the inner surface of the third portion.

[0017] In another preferred embodiment, the upper end of the first part is connected to the upper mold core of the supporting mold, the lower end of the fourth part is connected to the lower mold core of the supporting mold, and the lower end of the second part abuts against the upper end of the third part.

[0018] The present invention, by adopting the above-mentioned technical solution, has the following positive effects compared with the prior art: By applying the present invention, an integrated injection-molded shock absorber upper support with embedded pre-compression damping elements is proposed, realizing the integrated manufacturing of the shock absorber upper support, avoiding the problems caused by welding, simplifying the production process, reducing equipment and quality control costs, while ensuring the integrity and strength of the structure, improving the performance stability and reliability of the shock absorber, and solving the problems that are prone to occur in the currently widely used welded plastic shock absorber upper supports, such as insufficient structural strength, product performance fluctuation with welding state leading to noise and reduced inner core durability, as well as expensive production and quality control equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the upper support of an integrated injection-molded shock absorber with embedded pre-compression damping elements according to the present invention.

[0020] Figure 2 This is a cross-sectional view of the support on the integral injection-molded shock absorber with embedded pre-compression damping element according to the present invention.

[0021] Figure 3 This is a schematic diagram of the support structure on a plastic shock absorber in the prior art.

[0022] Figure 4 This is a schematic diagram of the upper cavity, lower cavity, vibration isolation element, and partition plate of an integrated injection-molded shock absorber with embedded pre-compression damping element before injection molding.

[0023] Figure 5 This is a schematic diagram of the upper cavity, lower cavity, vibration isolation element, and partition plate of an integrated injection-molded shock absorber with embedded pre-compression damping element, as well as the structure of the upper and lower cavities and inner core assembly after injection molding.

[0024] Figure 6 This is a schematic diagram of the structure of an integrated injection-molded shock absorber with embedded pre-compression damping elements during injection molding in a support mold according to this utility model.

[0025] Figure 7 This is a schematic diagram of the upper mold core of the upper support mold of an integrated injection-molded shock absorber with embedded pre-compression damping elements according to the present invention.

[0026] Figure 8 This is a schematic diagram of the lower mold core of the upper support mold of an integrated injection-molded shock absorber with embedded pre-compression damping elements according to the present invention.

[0027] Figure 9 This is a schematic diagram of the upper and lower cavities of an integrated injection-molded shock absorber with embedded pre-compression damping elements, according to the present invention.

[0028] Figure 10 This is a schematic diagram of the upper and lower cavities in another embodiment of the upper support of an integral injection-molded shock absorber with embedded pre-compression damping elements according to this utility model.

[0029] Figure 11 This is a schematic diagram of the assembly of the upper support and the shock absorber connecting rod of an integral injection-molded shock absorber with embedded pre-compression damping element according to the present invention.

[0030] Attached Figure

[0031] 1. Housing; 2. Upper cavity; 3. Lower cavity; 4. Vibration isolation element; 5. Partition plate; 6. Upper mold core supporting the mold; 7. Lower mold core supporting the mold; 8. Shock absorber connecting rod; 9. Nut; 11. Fixing hole; 21. First part; 22. Second part; 23. First positioning groove; 31. Third part; 32. Fourth part; 33. Second positioning groove. Detailed Implementation

[0032] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front", "back", "horizontal", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0034] It should be noted that the terms "horizontal" and "vertical" in this utility model are used to describe approximate positional relationships, and not strictly "horizontal plane" or "vertical plane".

[0035] like Figure 1-11 As shown, a preferred embodiment of an integrally injection-molded shock absorber upper support with embedded pre-compression damping elements is provided, comprising:

[0036] Casing 1;

[0037] Upper cavity 2 is located at the upper end of the interior of housing 1, and the outer surface of upper cavity 2 is connected to housing 1;

[0038] The lower cavity 3 is located at the lower end of the interior of the housing 1, and the outer surface of the lower cavity 3 is connected to the housing 1.

[0039] Vibration isolation element 4 has its upper end located inside the upper cavity 2 and abutting against the inner surface of the upper cavity 2, and its lower end located inside the lower cavity 3 and abutting against the inner surface of the lower cavity 3. Vibration isolation element 4 connects the upper cavity 2 and the lower cavity 3. Vibration isolation element 4 is used to withstand axial preload and radial preload. Through vibration isolation element 4, the upper support of the shock absorber can attenuate, decouple, and isolate vibrations and noises excited by the road surface and transmitted to the vehicle body through the wheels and shock absorber, as well as vibrations and noises generated by the shock absorber itself. Vibration isolation element 4 also provides the possibility for the yaw motion of the shock absorber and meets the vehicle's requirements for the movement and load of the shock absorber in the axial, radial, and yaw directions.

[0040] Baffle 5 is installed inside vibration isolation element 4.

[0041] Furthermore, as a preferred embodiment, the housing 1 is preferably injection molded from a high-strength engineering plastic material. Different grades of material can be selected depending on the application requirements of the part. Further, the material of the housing 1 is preferably glass fiber reinforced nylon PA6 or PA66, with a glass fiber ratio of 10%-60%. Preferably, the housing 1 is made of 50% glass fiber reinforced nylon PA66.

[0042] Furthermore, as a preferred embodiment, the upper cavity 2 is preferably injection molded from high-strength engineering plastic material. Further, the upper cavity 2 is preferably made of aluminum alloy material by stamping or casting. When there are special requirements, the upper cavity 2 can also be made of different metal materials through different processes, such as steel by stamping or spinning. When the upper cavity 2 is made of steel, the surface of the upper cavity 2 needs to be treated, such as by coating with paint or galvanizing, to prevent corrosion.

[0043] Furthermore, as a preferred embodiment, the lower cavity 3 is preferably injection molded from high-strength engineering plastic material. Further, the lower cavity 3 can be made of aluminum alloy material by stamping or casting. When there are special requirements, the lower cavity 3 can also be made of different metal materials through different processes, such as steel by stamping or spinning. When the lower cavity 3 is made of steel, the surface of the lower cavity 3 needs to be treated, such as by coating with paint or galvanizing, to prevent corrosion.

[0044] Furthermore, as a preferred embodiment, the vibration isolation element 4 is preferably made of porous polyurethane material, and is formed by foaming in a cavity or by machining pre-fabricated tubing. Further, the material used to manufacture the vibration isolation element 4 is preferably an elastomer material, and the vibration isolation element 4 is preferably made of NDI-type, but not limited to, porous polyurethane elastomer material. Further, the material properties of the porous polyurethane product of this invention are as follows: its density ranges from 200 to 1000 kg / m³ according to DIN EN ISO 845 standard, with 300 to 750 kg / m³ being commonly used; its tensile strength ranges from 2 to 8 MPa according to DIN EN ISO 1798 standard; its elongation at break ranges from 200% to 700% according to DIN EN ISO 1798 standard; or its tear strength ranges from 4 to 12 N / mm according to DIN ISO 34-1 B(b) standard. The material used in this invention must meet at least two of the above material performance requirements.

[0045] Furthermore, as a preferred embodiment, the porous polyurethane material used in this invention can be easily and inexpensively processed. The methods for preparing the raw materials have been extensively described in the prior art and will not be repeated here. Further, the porous polyurethane elastomer can typically be prepared based on toluene diisocyanate (TDI) and naphthalene diisocyanate (NDI), preferably based on 2,6-diisocyanate toluene (TODI) and 1,5-naphthalene diisocyanate (5-NDI). The vibration isolation element 4 based on the porous polyurethane elastomer material is typically foamed in a closed cavity of a mold. The prepared porous polyurethane elastomer material is injected into the closed cavity, and the porous polyurethane elastomer material can be foamed and molded in the cavity at a certain temperature and time, thereby producing the vibration isolation element 4. The vibration isolation element 4 is demolded after being kept at a temperature in the cavity for 5 to 60 minutes.

[0046] Furthermore, as a preferred embodiment, if the vibration isolation element 4 is not a body of rotation about the central axis in shape, it can be directly formed in the cavity, and the partition 5 can be directly fixed in the cavity as part of the mold and taken out of the mold together with the foamed vibration isolation element 4; if the vibration isolation element 4 is a body of rotation about the central axis, in addition to being directly formed in the cavity of the mold, it can also be obtained by machining pre-made rods or tubes. The end face contour of the vibration isolation element 4 can be processed by directly cutting with a forming tool. Compared with the processing method of directly foaming and forming a single vibration isolation element 4 in the cavity, machining the vibration isolation element 4 from pre-made rods or tubes helps to reduce production costs and effectively improves the stability of the performance of the vibration isolation element 4.

[0047] In another embodiment of the present invention, the vibration isolation element 4 is preferably made of vulcanized rubber elastomer material, and the vibration isolation element 4 and the partition plate 5 are bonded together by vulcanization with adhesive.

[0048] Furthermore, as a preferred embodiment, the partition 5 is preferably made of metal material, and the projection of the contact surface between the partition 5 and the vibration isolation element 4 in the axial direction is arranged in a ring shape. Under the premise of ensuring easy production and assembly, the area of ​​the contact surface should be maximized.

[0049] Furthermore, as a preferred embodiment, the inner edge of the vibration isolation element 4 is provided with an annular groove, and the partition plate 5 is disposed in the annular groove and abuts against the vibration isolation element 4. The partition plate 5 is axially limited between the upper inner wall of the annular groove and the lower inner wall of the annular groove.

[0050] Furthermore, in a preferred embodiment, both the vibration isolation element 4 and the partition plate 5 are arranged in a circular shape. The vibration isolation element 4 is provided with a first mounting hole through it, and the partition plate 5 is provided with a second mounting hole through it. One end of the shock absorber connecting rod 8 can pass through the first mounting hole and the second mounting hole.

[0051] Furthermore, in a preferred embodiment, the shock absorber connecting rod 8 passes through the housing 1, the lower cavity 2, the vibration isolation element 4, the partition 5 and the upper cavity 2 from bottom to top. The partition 5 is sleeved around the periphery of the shock absorber connecting rod 8, and the upper support of the shock absorber is connected to the shock absorber through the partition 5 and the shock absorber connecting rod 8.

[0052] Furthermore, in a preferred embodiment, the upper end of the shock absorber connecting rod 8 has a stud, which passes through the lower cavity 3, the partition 5, the vibration isolation element 4, the upper cavity 2, and the housing 1 from bottom to top. A nut 9 is provided in the accommodating space formed by the upper cavity 2, and the nut 9 is sleeved around the stud. Furthermore, the shock absorber connecting rod 8 is locked to the partition 5 by the nut 9.

[0053] Furthermore, as a preferred embodiment, the housing 1 is provided with fixing holes 11 on both sides, and bolts are installed in the fixing holes 11. The housing 1 is connected to the car body or frame by the bolts.

[0054] Furthermore, in a preferred embodiment, the upper cavity 2 includes a first part 21 and a second part 22, with the lower end of the first part 21 connected to the upper end of the second part 22.

[0055] Furthermore, in a preferred embodiment, both the first part 21 and the second part 22 are cylindrical, and the outer contour of the second part 22 is larger than the outer contour of the first part 21.

[0056] Furthermore, as a preferred embodiment, the second part 22 and the first part 21 are preferably integrally formed.

[0057] Furthermore, in a preferred embodiment, the lower cavity 3 includes a third part 31 and a fourth part 32, with the lower end of the third part 31 connected to the upper end of the fourth part 32.

[0058] Furthermore, in a preferred embodiment, both the third part 31 and the fourth part 32 are cylindrical, with the outer contour of the third part 31 being larger than that of the fourth part 32.

[0059] Furthermore, as a preferred embodiment, the third part 31 and the fourth part 32 are preferably integral in structure.

[0060] Furthermore, in a preferred embodiment, the upper surface of the second part 22 is planar, and the upper surface of the third part 31 is planar.

[0061] In another embodiment of this utility model, the upper surface of the second part 22 is wavy, the upper end of the first part 21 is provided with a first positioning groove 23, the lower surface of the third part 31 is wavy, and the lower end of the fourth part 32 is provided with a second positioning groove 33. The wavy surface of the upper surface of the second part 22 corresponds to the wavy surface of the lower surface of the third part 31. Further, the first positioning groove 23 is used for positioning the upper cavity 2 in the supporting mold, and the second positioning groove 33 is used for positioning the lower cavity 3 in the supporting mold.

[0062] Furthermore, in a preferred embodiment, the upper end of the vibration isolation element 4 abuts against the inner surface of the second part 22, and the lower end of the vibration isolation element 4 abuts against the inner surface of the third part 31.

[0063] Furthermore, in a preferred embodiment, the upper end of the first part 21 is connected to the upper mold core 6 of the supporting mold, the lower end of the fourth part 32 is connected to the lower mold core 7 of the supporting mold, and the lower end of the second part 22 abuts against the upper end of the third part 31.

[0064] Furthermore, as a preferred embodiment, before injection molding the housing 1, the vibration isolation element 4 and the partition plate 5 are first assembled into an assembly. Then, the assembly of the vibration isolation element 4 and the partition plate 5 is assembled with the upper cavity 2 and the lower cavity 3 to form the upper and lower cavity and inner core assembly. The assembled upper and lower cavity and inner core assembly is placed in the support mold and positioned. During the mold closing process, the lower cavity 3 is placed in the lower mold core 72 of the support mold and remains fixed, while the upper cavity 2 moves downward with the upper mold core 71 of the support mold until the upper mold core 71 of the support mold contacts the lower mold core 72 of the support mold. At this time, the upper mold core 71 of the support mold and the lower mold core 72 of the support mold close. At the same time, the lower end face of the second part 22 of the upper cavity 2 contacts and presses tightly together with the upper end face of the third part 31 of the lower cavity 3, forming part of the inner cavity of the support mold. Meanwhile, the vibration isolation element 4 is pre-compressed under the pressure of the upper cavity 2.

[0065] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A one-piece injection-molded shock absorber upper support with embedded pre-compression damping elements, characterized in that, include: case; An upper cavity is disposed at the upper end of the interior of the housing, and the outer surface of the upper cavity is connected to the housing; A lower cavity is disposed at the lower end of the interior of the housing, and the outer surface of the lower cavity is connected to the housing; A vibration isolation element, wherein the upper end of the vibration isolation element is disposed in the upper cavity and abuts against the inner surface of the upper cavity, and the lower end of the vibration isolation element is disposed in the lower cavity and abuts against the inner surface of the lower cavity, and the vibration isolation element connects the upper cavity and the lower cavity; A partition plate is disposed on the vibration isolation element.

2. The upper support of the integrally injection-molded shock absorber with embedded pre-compression damping elements according to claim 1, characterized in that, The vibration isolation element has an annular groove on its inner edge, and the partition plate is disposed in the annular groove and abuts against the vibration isolation element.

3. The support for the integrally injection-molded shock absorber with embedded pre-compression damping elements according to claim 1, characterized in that, Both the vibration isolation element and the partition plate are arranged in a circular shape. The vibration isolation element has a first mounting hole through it, and the partition plate has a second mounting hole through it. One end of the shock absorber connecting rod can pass through the first mounting hole and the second mounting hole.

4. The upper support of the integrally injection-molded shock absorber with embedded pre-compression damping elements according to claim 1, characterized in that, The housing has fixing holes on both sides, and bolts are installed in the fixing holes. The housing is fixed to the car body or frame by bolts.

5. The upper support of the integrally injection-molded shock absorber with embedded pre-compression damping elements according to claim 1, characterized in that, The upper cavity includes a first part and a second part, wherein the lower end of the first part is connected to the upper end of the second part, and the upper surface of the second part is planar.

6. The upper support of the integrally injection-molded shock absorber with embedded pre-compression damping elements according to claim 5, characterized in that, The upper surface of the second part is wavy, and the upper end of the first part is provided with a first positioning groove.

7. The integral injection-molded shock absorber upper support with embedded pre-compression damping element according to claim 5, characterized in that, The lower cavity includes a third part and a fourth part, the lower end of the third part is connected to the upper end of the fourth part, and the lower end surface of the third part is planar.

8. The integral injection-molded shock absorber upper support with embedded pre-compression damping element according to claim 7, characterized in that, The lower end face of the third part is wavy, and the lower end of the fourth part is provided with a second positioning groove.

9. The upper support of the integrally injection-molded shock absorber with embedded pre-compression damping elements according to claim 7, characterized in that, The upper end of the vibration isolation element abuts against the inner surface of the second part, and the lower end of the vibration isolation element abuts against the inner surface of the third part.

10. The integral injection-molded shock absorber upper support with embedded pre-compression damping element according to claim 7, characterized in that, The upper end of the first part is connected to the upper mold core of the mold, the lower end of the fourth part is connected to the lower mold core of the mold, and the lower end of the second part abuts against the upper end of the third part.

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