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

Abstract

The invention discloses an integrally injection-molded shock absorber upper support embedded with pre-compression damping elements. 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 invention, the integrally injection-molded shock absorber upper support embedded with the pre-compression damping element is provided; 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] The invention relates to the technical field of an automobile shock absorber upper support, and in particular to an integral injection-molded shock absorber upper support embedded with a pre-compression vibration-damping element. Background Art

[0002] In the current market, the upper support of plastic shock absorbers usually adopts a plastic shell design with an upper opening, in which the pre-compressed damping element assembly is located in the inner cavity of the shell and is tightly connected to the plastic top cover by ultrasonic welding or laser welding. However, this structure has significant disadvantages: first, whether it is ultrasonic welding or laser welding, due to the influence of the reinforcing material in the plastic, it is difficult to ensure that the reinforcing material and the body on the fusion surface of the shell and the end cover can be perfectly integrated during the welding process, which also leads to certain risks in the structural strength of the upper support of the shock absorber; secondly, the plastic welding process itself has a large volatility, and it is impossible to guarantee the stability of the welding height and welding surface strength between the upper support shell and the end cover, and small welding manufacturing defects may cause changes in the axial stiffness characteristics of the parts, thereby affecting the performance stability of the upper support of the shock absorber, and may cause potential noise problems; finally, in order to improve the welding quality between the plastic upper support shell and the plastic end cover, very complex production and quality control equipment is required, which not only increases the production cost, but also has a relatively low production efficiency. Summary of the invention

[0003] In view of this, in order to solve the above problems, the object of the present invention is to provide an integral injection molded shock absorber upper support embedded with a pre-compression damping element, comprising:

[0004] case;

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

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

[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, 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 arranged in the vibration isolation element.

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

[0010] In another preferred embodiment, the vibration isolation element and the partition are both arranged in a circular ring shape, a first mounting hole is arranged through the vibration isolation element, a second mounting hole is arranged through the partition, and 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, fixing holes are arranged on both sides of the shell, bolts are arranged in the fixing holes, and the shell is connected to the body or frame of the car through the bolts.

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

[0014] In another preferred embodiment, the upper end surface of the second part is arranged in a plane, and the upper end surface of the third part is arranged in a plane.

[0015] In another preferred embodiment, the upper end surface of the second part is wavy, the upper end of the first part is provided with a first positioning groove, the lower end 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 part, and the lower end of the vibration isolation element abuts against the inner surface of the third part.

[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 is abutted against the upper end of the third part.

[0018] Due to the adoption of the above-mentioned technical scheme, the present invention has the following positive effects compared with the prior art: through the application of the present invention, an integral injection-molded shock absorber upper support embedded with a pre-compressed vibration-damping element is proposed, which realizes the integrated manufacturing of the shock absorber upper support, avoids the problems caused by welding, simplifies the production process, reduces the equipment and quality control costs, and at the same time ensures the integrity and strength of the structure, improves the performance stability and reliability of the shock absorber, and solves the problems of the currently widely used welded plastic shock absorber upper support that are prone to insufficient structural strength, product performance fluctuating with the welding state, thereby causing noise and reduced inner core durability, and expensive production and quality control equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an upper support of an integral injection-molded shock absorber embedded with a pre-compression damping element according to the present invention;

[0020] Figure 2 A cross-sectional view of an upper support of an integral injection-molded shock absorber embedded with a pre-compression damping element according to the present invention;

[0021] Figure 3 It is a schematic diagram of the structure of the upper support of the plastic shock absorber used for automobile suspension in the prior art;

[0022] Figure 4 It is a structural schematic diagram of the upper cavity, the lower cavity, the vibration isolation element and the partition plate supported on the integral injection-molded shock absorber embedded with the pre-compression vibration reduction element of the present invention after the upper and lower cavities and the inner core assembly are assembled before injection molding;

[0023] Figure 5 It is a structural schematic diagram of the upper cavity, the lower cavity, the vibration isolation element, and the upper and lower cavities and the inner core assembly during injection molding of an integral injection-molded shock absorber embedded with a pre-compressed vibration reduction element according to the present invention after the assembly of the partition is completed;

[0024] Figure 6 It is a schematic structural diagram of an integral injection-molded shock absorber upper support embedded with a pre-compression damping element during injection molding in a supporting mold of the present invention;

[0025] Figure 7 It is a structural schematic diagram of an upper mold core of an upper supporting mold of an integral injection-molded shock absorber embedded with a pre-compressed vibration-damping element according to the present invention;

[0026] Figure 8 It is a structural schematic diagram of a lower mold core of an upper supporting mold of an integral injection-molded shock absorber embedded with a pre-compressed vibration-damping element according to the present invention;

[0027] Fig. 9 It is a structural schematic diagram of an upper cavity and a lower cavity supported on an integral injection-molded shock absorber embedded with a pre-compression vibration-damping element according to the present invention;

[0028] Fig.10 It is a schematic structural diagram of an upper cavity and a lower cavity in another embodiment of an upper support of an integral injection-molded shock absorber embedded with a pre-compression vibration-damping element according to the present invention;

[0029] Fig.11 The present invention is a schematic diagram of the assembly of an upper support of an integrally-injected shock absorber embedded with a pre-compression damping element and a shock absorber connecting rod.

[0030] In the attached figure:

[0031] 1. Shell; 2. Upper cavity; 3. Lower cavity; 4. Vibration isolation element; 5. Partition; 6. Upper mold core of supporting mold; 7. Lower mold core of supporting 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 DESCRIPTION

[0032] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it is necessary to understand that the orientation or position relationship indicated by the terms such as "upper", "lower", "left", "right", "inside", "outside", "front", "back", "lateral" and "vertical" is based on the orientation or position relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or original referred to must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] It should be specially explained that the “horizontal” and “vertical” in the present invention are used to illustrate the approximate positional relationship, rather than a strict “horizontal plane” or “vertical plane”.

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

[0036] Shell 1;

[0037] The upper cavity 2 is arranged at the upper end of the shell 1, and the outer surface of the upper cavity 2 is connected to the shell 1;

[0038] The lower cavity 3 is arranged at the lower end of the inner part of the shell 1, and the outer surface of the lower cavity 3 is connected to the shell 1;

[0039] A vibration isolation element 4, wherein the upper end of the vibration isolation element 4 is arranged in the upper cavity 2 and abuts against the inner surface of the upper cavity 2, and the lower end of the vibration isolation element 4 is arranged in the lower cavity 3 and abuts against the inner surface of the lower cavity 3, and the vibration isolation element 4 connects the upper cavity 2 and the lower cavity 3; wherein the vibration isolation element 4 is used to bear the axial preload pressure and the radial preload pressure, and through the vibration isolation element 4, the upper support of the shock absorber can attenuate, decouple and isolate the vibration and noise excited by the road surface and transmitted to the vehicle body through the wheels and the shock absorber, as well as the vibration and noise generated by the shock absorber itself, and the vibration isolation element 4 also provides the possibility for the yaw movement of the shock absorber, and satisfies the movement and load-bearing requirements of the entire automobile for the shock absorber in the axial, radial and yaw directions;

[0040] The partition plate 5 is arranged in the vibration isolation element 4 .

[0041] Further, as a preferred embodiment, the housing 1 is preferably injection molded with high-strength engineering plastic material, and different grades of materials can be selected according to different application requirements of the parts. Further, the material of the housing 1 is preferably glass fiber reinforced nylon PA6 or PA66, and the glass fiber ratio is 10%-60%. Preferably, the housing 1 is made of 50% glass fiber reinforced nylon PA66.

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

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

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

[0045] Further, as a preferred embodiment, the porous polyurethane material used in the present invention can be easily and cheaply processed. The preparation method of the raw materials has been introduced in many prior arts, so it will not be repeated here. Further, the porous polyurethane elastomer can be prepared based on isocyanate diisocyanatotoluene (TDI) and naphthalene diisocyanate (NDI), preferably based on 2,6-diisocyanatotoluene (TODI) and 1,5-naphthalene diisocyanate (5-NDI). The vibration isolation element 4 based on the porous polyurethane elastomer material is usually foamed in the closed cavity of the mold, and the prepared porous polyurethane elastomer material is injected into the closed cavity. The porous polyurethane elastomer material can be foamed and formed in the cavity at a certain temperature and time, thereby preparing the vibration isolation element 4, and the vibration isolation element 4 is demolded after being kept warm 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 revolution around the central axis in appearance, it can be directly molded in the cavity, and the partition 5 can be directly fixed in the cavity as a part of the mold and taken out from the mold together with the foamed vibration isolation element 4; if the vibration isolation element 4 has a body of revolution around the central axis, in addition to being directly molded in the cavity of the mold, it can also be obtained by machining prefabricated rods or tubes, and the end face contour of the vibration isolation element 4 can be directly cut by a molding tool. Compared with the processing method of directly foaming a single vibration isolation element 4 in the cavity, manufacturing the vibration isolation element 4 by machining prefabricated rods or tubes is beneficial to reducing production costs and can effectively improve 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 a vulcanized rubber elastomer material, and the vibration isolation element 4 and the partition plate 5 are bonded by vulcanization with an 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 expanded as much as possible.

[0049] Furthermore, as a preferred embodiment, an annular groove is provided on the inner edge of the vibration isolation element 4, and a partition plate 5 is disposed in the annular groove and abuts against the vibration isolation element 4, and 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] Further, as a preferred embodiment, the vibration isolation element 4 and the partition 5 are both arranged in a circular ring shape, the vibration isolation element 4 is provided with a first mounting hole, the partition 5 is provided with a second mounting hole, and one end of the shock absorber connecting rod 8 can pass through the first mounting hole and the second mounting hole.

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

[0052] Further, as a preferred embodiment, the upper end of the shock absorber connecting rod 8 has a stud, and the stud 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, and a nut is provided in the accommodation space formed by the upper cavity 2, and the nut 9 is sleeved on the periphery of the stud. Further, the shock absorber connecting rod 8 is locked with the partition 5 through the nut 9.

[0053] Furthermore, as a preferred embodiment, fixing holes 11 are provided on both sides of the housing 1, bolts are provided in the fixing holes 11, and the housing 1 is connected to the body or frame of the automobile through the bolts.

[0054] Further, as a preferred embodiment, the upper cavity 2 includes: a first part 21 and a second part 22 , and the lower end of the first part 21 is connected to the upper end of the second part 22 .

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

[0056] Further, as a preferred embodiment, the second part 22 and the first part 21 are preferably in an integrated structure.

[0057] Further, as a preferred embodiment, the lower cavity 3 includes: a third part 31 and a fourth part 32 , and the lower end of the third part 31 is connected to the upper end of the fourth part 32 .

[0058] Further, as a preferred embodiment, the third portion 31 and the fourth portion 32 are both cylindrical, and the outer contour of the third portion 31 is larger than the outer contour of the fourth portion 32 .

[0059] Further, as a preferred embodiment, the third part 31 and the fourth part 32 are preferably an integrated structure.

[0060] Further, as a preferred embodiment, the upper end surface of the second portion 22 is arranged in a plane, and the upper end surface of the third portion 31 is arranged in a plane.

[0061] In another embodiment of the present invention, the upper end surface of the second part 22 is arranged in a wave shape, the upper end of the first part 21 is provided with a first positioning groove 23, the lower end surface of the third part 31 is arranged in a wave shape, the lower end of the fourth part 32 is provided with a second positioning groove 33, and the wave surface of the upper end surface of the second part 22 corresponds to the wave surface of the lower end 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] Further, as a preferred embodiment, the upper end of the vibration isolation element 4 abuts against the inner surface of the second portion 22 , and the lower end of the vibration isolation element 4 abuts against the inner surface of the third portion 31 .

[0063] Further, as 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 is abutted against the upper end of the third part 31.

[0064] Furthermore, as a preferred embodiment, before the shell 1 is produced by injection molding, the vibration isolation element 4 and the partition 5 are first assembled into an assembly, and then the assembly formed by the vibration isolation element 4 and the partition 5 are assembled with the upper cavity 2 and the lower cavity 3 into the upper and lower cavity and inner core assembly, and the assembled upper and lower cavity and inner core assembly are placed in the supporting mold and positioned. During the mold closing process, the lower cavity 3 is arranged in the lower mold core 72 of the supporting mold and remains fixed, and the upper cavity 2 will move downward with the upper mold core 71 of the supporting mold until the upper mold core 71 of the supporting mold contacts the lower mold core 72 of the supporting mold. At this time, the upper mold core 71 of the supporting mold and the lower mold core 72 of the supporting mold are closed, and at the same time, the lower end face of the second part 22 of the upper cavity 2 will contact and be pressed together with the upper end face of the third part 31 of the lower cavity 3 to form a part of the inner cavity of the supporting mold; at the same time, the vibration isolation element 4 will be pre-compressed under the pressure of the upper cavity 2.

[0065] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. An integral injection molded shock absorber upper support embedded with a pre-compressed damping element, characterized in that: include: case; An upper cavity, the upper cavity is arranged at the upper end of the interior of the shell, and the outer surface of the upper cavity is connected to the shell; A lower cavity, the lower cavity is arranged at the lower end of the interior of the shell, and the outer surface of the lower cavity is connected to the shell; 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, 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 is arranged in the vibration isolation element.

2. The one-piece injection molded shock absorber upper support with embedded pre-compression damping element according to claim 1, characterized in that: An annular groove is arranged on the inner edge of the vibration isolation element, and the partition plate is arranged in the annular groove and abuts against the vibration isolation element.

3. The one-piece injection molded shock absorber upper support with embedded pre-compression damping element according to claim 1, characterized in that: The vibration isolation element and the partition are both arranged in a circular ring shape. The vibration isolation element is provided with a first mounting hole, and the partition is provided with a second mounting hole. One end of the shock absorber connecting rod can pass through the first mounting hole and the second mounting hole.

4. The one-piece injection molded shock absorber upper support with embedded pre-compression damping element according to claim 1, characterized in that: Fixing holes are arranged on both sides of the shell, bolts are arranged in the fixing holes, and the shell is connected to the body or frame of the car through the bolts.

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

6. The one-piece 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, and the lower end of the third part is connected to the upper end of the fourth part.

7. The one-piece injection molded shock absorber upper support with embedded pre-compression damping element according to claim 6, characterized in that: The upper end surface of the second part is arranged in a plane, and the upper end surface of the third part is arranged in a plane.

8. The one-piece injection molded shock absorber upper support with embedded pre-compression damping element according to claim 6, characterized in that: The upper end surface of the second part is arranged in a wave shape, the upper end of the first part is provided with a first positioning groove, the lower end surface of the third part is arranged in a wave shape, and the lower end of the fourth part is provided with a second positioning groove.

9. The one-piece injection molded shock absorber upper support with embedded pre-compression damping element according to claim 6, 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 one-piece injection molded shock absorber upper support with embedded pre-compression damping element according to claim 6, characterized in that: 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 is against the upper end of the third part.

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