Active shock absorber for motor vehicle

Abstract

The active shock absorber for the motor vehicle comprises a shock absorber body, a valve block and an energy accumulator body, the shock absorber body comprises a shock absorber inner cylinder and a shock absorber outer cylinder, and a cavity between the shock absorber inner cylinder and the shock absorber outer cylinder forms a third oil cavity; a piston rod, a piston valve and a guider are arranged in the shock absorber inner cylinder, the interior of the shock absorber inner cylinder is divided into a first oil cavity and a second oil cavity by the piston valve, and the second oil cavity is communicated with a third oil cavity; a compression valve and a recovery valve are arranged in the valve block, the compression valve is communicated with the first oil cavity, and the recovery valve is communicated with the third oil cavity; the energy accumulator body comprises an energy accumulator inner cylinder and an energy accumulator outer cylinder, a sixth oil cavity is formed in the energy accumulator inner cylinder, a compressed air bag is arranged in the sixth oil cavity, and the compression valve is communicated with the sixth oil cavity through the oil cavity; a tenth oil cavity is formed by a cavity between the energy accumulator inner cylinder and the energy accumulator outer cylinder, and a recovery air bag is arranged in the tenth oil cavity.

Description

Technical Field

[0001] This utility model relates to an active shock absorber for motor vehicles, belonging to the field of shock absorber technology. Background Technology

[0002] Currently, the main types of shock absorbers used in motor vehicles are passive shock absorbers, semi-active shock absorbers, and active shock absorbers. Compared to the former two, active shock absorbers have a significant advantage in terms of handling and comfort of motor vehicles, but existing active shock absorbers also have more complex structures and installation requirements. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an active shock absorber for motor vehicles that is simple and compact in structure, easy to process and install, and has excellent performance.

[0004] To achieve the aforementioned objectives, the technical solution adopted by this utility model includes:

[0005] An active shock absorber for motor vehicles includes a shock absorber body, a valve block, and an accumulator body. The shock absorber body includes an inner shock absorber cylinder and an outer shock absorber cylinder. The inner shock absorber cylinder is located inside the outer shock absorber cylinder, and a cavity exists between the inner and outer shock absorber cylinders to form a third oil chamber. A piston rod, a piston valve, and a guide are disposed inside the inner shock absorber cylinder. The piston valve divides the inner shock absorber cylinder into a first oil chamber and a second oil chamber, which are connected to the third oil chamber to allow oil to flow between them. The shock absorber body is mounted on one end of the valve block, which contains a compression valve and a return valve. The compression valve is connected to the first oil chamber, and the recovery valve is connected to the third oil chamber. The accumulator body is located on one side of the valve block and connected to the valve block. The accumulator body includes an inner cylinder and an outer cylinder. The inner cylinder forms a sixth oil chamber, and a compressed air bag is installed in the sixth oil chamber. The compression valve is connected to the sixth oil chamber through the oil chamber. Oil enters the sixth oil chamber and compresses the compressed air bag to achieve energy storage. The cavity between the inner cylinder and the outer cylinder forms a tenth oil chamber, and a recovery air bag is installed in the tenth oil chamber. The recovery valve is connected to the tenth oil chamber through the oil chamber. Oil enters the tenth oil chamber and compresses the recovery air bag to achieve energy storage.

[0006] Furthermore, the valve block is provided with a fourth oil chamber and a fifth oil chamber. The fourth oil chamber is connected to the first oil chamber and the compression valve respectively, and the fifth oil chamber is connected to the compression valve and the sixth oil chamber respectively. The oil in the first oil chamber impacts the compression valve through the fourth oil chamber, and the hydraulic oil passing through the compression valve enters the sixth oil chamber through the fifth oil chamber.

[0007] Furthermore, the valve block is provided with a seventh oil chamber and an eighth oil chamber. The seventh oil chamber is connected to the third oil chamber and the recovery valve, respectively. The eighth oil chamber is connected to the recovery valve and the tenth oil chamber, respectively. The hydraulic oil in the third oil chamber impacts the recovery valve through the seventh oil chamber. The hydraulic oil through the recovery valve enters the tenth oil chamber through the eighth oil chamber.

[0008] Furthermore, the compression valve is provided with a first shut-off valve, a first nozzle and a first inlet / outlet, and the first inlet / outlet is connected to the fifth oil chamber; the recovery valve is provided with a second shut-off valve, a second nozzle and a second inlet / outlet, and the second inlet / outlet is connected to the eighth oil chamber.

[0009] Furthermore, a compressed air bag support is provided in the sixth oil chamber, and the compressed air bag support is used to support the compressed air bag at least.

[0010] Furthermore, a recovery air bag support is provided in the tenth oil chamber, and the recovery air bag support is used to support the recovery air bag at least.

[0011] Furthermore, the guide has multiple oil passages on its sidewall, which are connected to the second oil chamber and the third oil chamber respectively, so that hydraulic oil can flow between the second oil chamber and the third oil chamber.

[0012] Furthermore, a support ring is provided on the side wall of the accumulator outer cylinder. Compared with the prior art, the advantages of this utility model include:

[0013] 1) The present invention provides an active shock absorber for motor vehicles, wherein the valve block integrates a compression valve and a recovery valve, and a compression air bag and a recovery air bag are set in the sealed cavity as an energy accumulator to achieve the shock absorption effect of the vehicle. The structure is simple and compact, easy to process and install, and has a good shock absorption effect.

[0014] 2) The present invention provides an active shock absorber for motor vehicles, wherein the oil between the inner cylinder and the outer cylinder of the shock absorber flows through an oil passage provided on the guide, which avoids the need to open holes in the inner cylinder of the shock absorber, reduces the processing and installation difficulty of the inner cylinder of the shock absorber, and improves the strength of the inner cylinder of the shock absorber. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1This is a front view of an active shock absorber for motor vehicles provided in a typical embodiment of this utility model;

[0017] Figure 2 This is a cross-sectional view of an active shock absorber for motor vehicles provided in a typical embodiment of this utility model;

[0018] Figure 3 This is a cross-sectional view of the valve block provided in a typical embodiment of this utility model;

[0019] Explanation of reference numerals in the attached drawings: 1. Piston rod; 2. Sealing nut; 3. Guide; 4. Inner cylinder of shock absorber; 5. Outer cylinder of shock absorber; 6. Piston valve; 7. Valve block; 8. Compression valve; 9. Inner cylinder of accumulator; 10. Outer cylinder of accumulator; 11. Support ring; 12. Accumulator end cap; 13. Reset valve; 14. Compressed air bag bracket; 15. Reset air bag bracket; 16. Compressed air bag; 17. Reset air bag; 18. First shut-off valve; 181. Second shut-off valve; 19. First nozzle; 191. Second nozzle; 20. First inlet / outlet; 201. Second inlet / outlet; 111. First oil chamber; 112. Fourth oil chamber; 113. Fifth oil chamber; 114. Sixth oil chamber; 211. Second oil chamber; 212. Third oil chamber; 213. Seventh oil chamber; 214. Eighth oil chamber; 215. Tenth oil chamber; Detailed Implementation

[0020] In view of the shortcomings of the prior art, the inventor of this case, through long-term research and extensive practice, has come up with the technical solution of this utility model. The following will further explain the technical solution, its implementation process, and its principles.

[0021] like Figure 1 , Figure 2As shown, this utility model discloses an active shock absorber for motor vehicles, including a shock absorber body, a valve block 7, and an accumulator body. The shock absorber body includes an inner shock absorber cylinder 4 and an outer shock absorber cylinder 5. The inner shock absorber cylinder 4 is located inside the outer shock absorber cylinder 5, and there is a cavity between the inner shock absorber cylinder 4 and the outer shock absorber cylinder 5, forming a third oil chamber 212. The inner shock absorber cylinder 4 is provided with a piston rod 1, a piston valve 6, and a guide 3. The piston valve 6 divides the inner shock absorber cylinder 4 into a first oil chamber 111 and a second oil chamber 211. The second oil chamber 211 and the third oil chamber 212 are connected to each other so that oil can flow between the second oil chamber 211 and the third oil chamber 212. Specifically, the side wall of the guide 3 is provided with multiple oil passages, which are respectively connected to the second oil chamber 211 and the third oil chamber 212 so that hydraulic oil can flow between the second oil chamber 211 and the third oil chamber 212. The guide 3 may have four, six, eight or more oil channels arranged circumferentially on its side wall. In this embodiment, the guide 3 has six oil channels arranged in a circumferential array on its side wall.

[0022] The shock absorber body is mounted on one end of the valve block 7. The valve block 7 contains a compression valve 8 and a recovery valve 13. The compression valve 8 is connected to the first oil chamber 111. Specifically, the valve block 7 has a fourth oil chamber 112, which is connected to both the first oil chamber 111 and the compression valve 8. The recovery valve 13 is connected to the third oil chamber 212. Specifically, the valve block 7 has a seventh oil chamber 213, which is connected to both the third oil chamber 212 and the recovery valve 13.

[0023] The accumulator body is located on one side of the valve block 7 and connected to the valve block 7. The accumulator body includes an inner cylinder 9 and an outer cylinder 10. The inner cylinder 9 forms a sixth oil chamber 114. A compressed air bag 16 is provided in the sixth oil chamber 114. The compression valve 8 is connected to the sixth oil chamber 114 through the oil chamber. Oil enters the sixth oil chamber 114 and compresses the compressed air bag 16 to achieve energy storage. Specifically, the valve block 7 is provided with a fifth oil chamber 113. The fifth oil chamber 113 is connected to the compression valve 8 and the sixth oil chamber 114 respectively. The oil in the first oil chamber 111 impacts the compression valve 8 through the fourth oil chamber 112. The hydraulic oil passing through the compression valve 8 enters the sixth oil chamber 114 through the fifth oil chamber 113.

[0024] The cavity between the inner cylinder 9 and the outer cylinder 10 of the accumulator forms the tenth oil chamber 215. A recovery air bag 17 is provided in the tenth oil chamber 215. The recovery valve 13 is connected to the tenth oil chamber 215 through the oil chamber. Oil enters the tenth oil chamber 215 and squeezes the recovery air bag 17 to achieve energy storage. Specifically, an eighth oil chamber 214 is provided on the valve block 7. The eighth oil chamber 214 is connected to the recovery valve 13 and the tenth oil chamber 215 respectively. The hydraulic oil in the third oil chamber 212 impacts the recovery valve 13 through the seventh oil chamber 213. The hydraulic oil through the recovery valve 13 enters the tenth oil chamber 215 through the eighth oil chamber 214.

[0025] Working principle: When the vehicle is impacted by the road surface, pushing the piston rod 1 downward, hydraulic oil is squeezed out from the first oil chamber 111, and passes through the fourth oil chamber 112 to impact the compression valve 8, generating a damping force to stop the vehicle's movement and maintain vehicle stability. The hydraulic oil passing through the compression valve 8 then passes through the fifth oil chamber 113 into the sixth oil chamber 114. The oil exceeding the volume of the sixth oil chamber 114 is stored by compressing a nitrogen-filled compression bag 16. When the vehicle is impacted by the road surface, pushing the piston rod 1 upward, hydraulic oil is squeezed out from the second oil chamber 211, and passes through the third oil chamber 212 and the seventh oil chamber 213 to impact the recovery valve 13, generating a damping force to stop the vehicle's movement and maintain vehicle stability. The hydraulic oil passing through the recovery valve 13 then passes through the eighth oil chamber 214 into the tenth oil chamber 215. The oil exceeding the volume of the tenth oil chamber 215 is stored by compressing a nitrogen-filled recovery bag 17.

[0026] This application integrates a compression valve 8 and a recovery valve 13 in the valve block 7, and sets a compression air bag 16 and a recovery air bag 17 in the sealed cavity as energy storage devices to achieve the shock absorption effect of the vehicle. The structure is simple and compact, easy to process and install, and has a good shock absorption effect.

[0027] In some implementations, in order to support and fix the compressed air bag 16, a compressed air bag bracket 14 is provided in the sixth oil chamber 114, and the compressed air bag bracket 14 can support and fix the compressed air bag 16.

[0028] In some implementations, in order to support and fix the recovery air bag 17, a recovery air bag bracket 15 is provided in the tenth oil chamber 215, and the recovery air bag bracket 15 can support and fix the recovery air bag 17.

[0029] In some implementation cases, such as Figure 3As shown, the compression valve 8 has a first shut-off valve 18, a first nozzle 19, and a first inlet / outlet port 20 on one side, with the first inlet / outlet port 20 communicating with the fifth oil chamber 113. The recovery valve 13 has a second shut-off valve 181, a second nozzle 191, and a second inlet / outlet port 201 on one side, with the second inlet / outlet port 201 communicating with the eighth oil chamber 214. The first shut-off valve 18 and the second shut-off valve 181 are used to close the connection between the internal oil of the shock absorber and the external environment when needed, facilitating the installation and removal of the shock absorber. The first nozzle 19 and the second nozzle 191 are used to fill the shock absorber with oil. The first inlet / outlet port 20 and the second inlet / outlet port 201 are used to connect to an external hydraulic power source to achieve the function of an active shock absorber.

[0030] The working principle of the active shock absorber is as follows: When the vehicle system detects a road collapse, external hydraulic oil enters the first oil chamber 111 through the first inlet / outlet 20, along the fifth oil chamber 113 and the fourth oil chamber 112, increasing the oil pressure in the first oil chamber 111. This causes a pressure difference between the upper and lower ends of the piston valve 6, which in turn pushes the piston valve 6 and the piston rod 1 to move upward. This allows the vehicle to actively raise the wheels when passing through a road collapse, thereby maintaining the stability of the vehicle body.

[0031] When the vehicle system detects a road bump, external hydraulic oil enters the second oil chamber 211 through the second inlet / outlet 201, along the eighth oil chamber 214, the seventh oil chamber 213, and the third oil chamber 212. This increases the oil pressure in the second oil chamber 211, causing a pressure difference between the upper and lower ends of the piston valve 6. This, in turn, pushes the piston valve 6 and the piston rod 1 downwards, allowing the vehicle to actively lower its wheels when passing over the road bump, thus maintaining vehicle stability.

[0032] In some embodiments, a support ring 11 is provided on the side wall of the accumulator outer cylinder 10, which is used to connect to the outside during the installation of the shock absorber. The support ring 11 can be a fork arm or a lifting lug. In this embodiment, the support ring 11 includes a fork arm, which is welded to the accumulator outer cylinder 10.

[0033] Example 1:

[0034] An active shock absorber for motor vehicles includes a shock absorber body, a valve block 7, and an accumulator body. The shock absorber body includes an inner shock absorber cylinder 4 and an outer shock absorber cylinder 5. The inner shock absorber cylinder 4 is located inside the outer shock absorber cylinder 5, and a cavity exists between the inner shock absorber cylinder 4 and the outer shock absorber cylinder 5, forming a third oil chamber 212. A piston rod 1, a piston valve 6, and a guide 3 are disposed inside the inner shock absorber cylinder 4. A sealing nut 2 is disposed on the outer side of the top end of the outer shock absorber cylinder 5, and the sealing nut 2 is threadedly connected to the outer shock absorber cylinder 5. The piston valve 6 divides the interior of the inner shock absorber cylinder 4 into a first oil chamber 111 and a second oil chamber 211. Six oil passages are arranged in a circumferential array on the side wall of the guide 3, and the oil passages are respectively connected to the second oil chamber 211 and the third oil chamber 212 to allow hydraulic oil to flow between the second oil chamber 211 and the third oil chamber 212.

[0035] The valve block 7 is disposed on one side of the shock absorber body. The valve block 7 is provided with a compression valve 8 and a recovery valve 13. The valve block 7 is provided with a fourth oil chamber 112, which is connected to the first oil chamber 111 and the compression valve 8 respectively. The valve block 7 is provided with a seventh oil chamber 213, which is connected to the third oil chamber 212 and the recovery valve 13 respectively.

[0036] The accumulator body is disposed on one side of the valve block 7 and connected to the valve block 7; the accumulator body includes an inner cylinder 9 and an outer cylinder 10, which are sealed by an end cap 12. The inner cylinder 9 forms a sixth oil chamber 114, which contains a compressed air bag 16 and a compressed air bag support 14. The compressed air bag support 14 is disposed on one side of the compressed air bag 16 to support it. The valve block 7 is provided with a fifth oil chamber 113, which is connected to the compression valve 8 and the sixth oil chamber 114. The oil in the first oil chamber 111 impacts the compression valve 8 through the fourth oil chamber 112, and the hydraulic oil passing through the compression valve 8 enters the sixth oil chamber 114 through the fifth oil chamber 113.

[0037] The cavity between the inner cylinder 9 and the outer cylinder 10 of the accumulator forms the tenth oil chamber 215. The tenth oil chamber 215 is provided with a recovery air bag 17 and a recovery air bag support 15. The recovery air bag support 15 is located on one side of the recovery air bag 17 to support the recovery air bag 17. The valve block 7 is provided with an eighth oil chamber 214. The eighth oil chamber 214 is connected to the recovery valve 13 and the tenth oil chamber 215 respectively. The hydraulic oil in the third oil chamber 212 impacts the recovery valve 13 through the seventh oil chamber 213. The hydraulic oil through the recovery valve 13 enters the tenth oil chamber 215 through the eighth oil chamber 214.

[0038] The compression valve 8 is provided with a first shut-off valve 18, a first oil nozzle 19 and a first oil inlet / outlet 20 on one side, and the first oil inlet / outlet 20 is connected to the fifth oil chamber 113; the recovery valve 13 is provided with a second shut-off valve 181, a second oil nozzle 191 and a second oil inlet / outlet 201 on one side, and the second oil inlet / outlet 201 is connected to the eighth oil chamber 214.

[0039] A fork arm is welded to the side wall of the accumulator outer cylinder 10.

[0040] It should be understood that the above embodiments are merely illustrative of the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. An active shock absorber for motor vehicles, characterized in that: include The shock absorber body includes an inner cylinder (4) and an outer cylinder (5). The inner cylinder (4) is located inside the outer cylinder (5), and there is a cavity between the inner cylinder (4) and the outer cylinder (5) to form a third oil chamber (212). The inner cylinder (4) is provided with a piston rod (1), a piston valve (6) and a guide (3). The piston valve (6) divides the inner cylinder (4) into a first oil chamber (111) and a second oil chamber (211). The second oil chamber (211) and the third oil chamber (212) are connected to each other so that oil can flow between the second oil chamber (211) and the third oil chamber (212). Valve block (7), the shock absorber body is set on one end of the valve block (7), the valve block (7) is provided with a compression valve (8) and a recovery valve (13), the compression valve (8) is connected to the first oil chamber (111), and the recovery valve (13) is connected to the third oil chamber (212); The accumulator body is located on one side of the valve block (7) and connected to the valve block (7). The accumulator body includes an inner cylinder (9) and an outer cylinder (10). The inner cylinder (9) forms a sixth oil chamber (114). A compressed air bag (16) is provided in the sixth oil chamber (114). The compression valve (8) is connected to the sixth oil chamber (114) through the oil chamber. Oil enters the sixth oil chamber (114) and squeezes the compressed air bag (16) to achieve energy storage. The cavity between the inner cylinder (9) and the outer cylinder (10) forms a tenth oil chamber (215). A recovery air bag (17) is provided in the tenth oil chamber (215). The recovery valve (13) is connected to the tenth oil chamber (215) through the oil chamber. Oil enters the tenth oil chamber (215) and squeezes the recovery air bag (17) to achieve energy storage.

2. An active shock absorber for motor vehicles according to claim 1, characterized in that: The valve block (7) is provided with a fourth oil chamber (112) and a fifth oil chamber (113). The fourth oil chamber (112) is connected to the first oil chamber (111) and the compression valve (8) respectively. The fifth oil chamber (113) is connected to the compression valve (8) and the sixth oil chamber (114) respectively. The oil in the first oil chamber (111) impacts the compression valve (8) through the fourth oil chamber (112). The hydraulic oil passing through the compression valve (8) enters the sixth oil chamber (114) through the fifth oil chamber (113).

3. An active shock absorber for motor vehicles according to claim 1, characterized in that: The valve block (7) is provided with a seventh oil chamber (213) and an eighth oil chamber (214). The seventh oil chamber (213) is connected to the third oil chamber (212) and the recovery valve (13) respectively. The eighth oil chamber (214) is connected to the recovery valve (13) and the tenth oil chamber (215) respectively. The hydraulic oil in the third oil chamber (212) impacts the recovery valve (13) through the seventh oil chamber (213). The hydraulic oil through the recovery valve (13) enters the tenth oil chamber (215) through the eighth oil chamber (214).

4. An active shock absorber for motor vehicles according to claim 1, characterized in that: The compression valve (8) is provided with a first shut-off valve (18), a first oil nozzle (19) and a first inlet / outlet (20) on one side, and the first inlet / outlet (20) is connected to the fifth oil chamber (113); the recovery valve (13) is provided with a second shut-off valve (181), a second oil nozzle (191) and a second inlet / outlet (201) on one side, and the second inlet / outlet (201) is connected to the eighth oil chamber (214).

5. An active shock absorber for motor vehicles according to claim 1, characterized in that: The sixth oil chamber (114) is provided with a compressed air bag support (14), which is used to support the compressed air bag (16) at least.

6. An active shock absorber for motor vehicles according to claim 1, characterized in that: The tenth oil chamber (215) is provided with a recovery air bag support (15), which is used to support the recovery air bag (17) at least.

7. An active shock absorber for motor vehicles according to claim 1, characterized in that: The guide (3) has multiple oil passages on its side wall, which are connected to the second oil chamber (211) and the third oil chamber (212) respectively, so that hydraulic oil can flow between the second oil chamber (211) and the third oil chamber (212).

8. An active shock absorber for motor vehicles according to claim 1, characterized in that: A support ring (11) is provided on the side wall of the accumulator outer cylinder (10).

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