Active shock absorber for motor vehicle

Abstract

The utility model discloses an active shock absorber for a motor vehicle. The active shock absorber comprises an outer cylinder, an inner cylinder, a springback oil way valve block, a springback air bag, a compression oil way valve block and a compression air bag. A piston and a piston rod are arranged in the inner cylinder, the piston is fixedly connected to one end of the piston rod, the piston slides left and right on the inner wall of the inner cylinder, and the piston divides the interior of the inner cylinder into a first springback oil cavity and a first compression oil cavity; a springback electromagnetic valve set and a springback oil inlet and outlet are arranged in the springback oil way valve block, a second springback oil cavity is formed in the springback oil way valve block, and the first springback oil cavity is communicated with the second springback oil cavity. The oil liquid extrudes the springback air bag to form a springback energy storage cavity; a compression electromagnetic valve set and a compression oil inlet and outlet are arranged in the compression oil way valve block, a second compression oil cavity is formed in the compression loop valve block, and the first compression oil cavity is communicated with the second compression oil cavity. Oil in the second compression oil cavity flows out of the compression air bag, and the oil extrudes the compression air bag to form a compression energy storage cavity.

Description

Technical Field

[0001] This utility model relates to an active shock absorber for motor vehicles, belonging to the field of transportation 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 the handling and comfort of motor vehicles, but they also have a more complex structure and higher 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 in structure, compact and easy to install.

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

[0005] An active shock absorber for motor vehicles includes an outer cylinder, an inner cylinder, a rebound oil circuit valve block, a rebound air chamber, a compression oil circuit valve block, and a compression air chamber. A piston and piston rod are disposed within the inner cylinder. The piston is fixedly connected to one end of the piston rod and slides against the inner wall of the inner cylinder, dividing the interior of the inner cylinder into a first rebound oil chamber and a first compression oil chamber. The rebound oil circuit valve block is fixedly disposed on the outer cylinder and contains a rebound solenoid valve assembly. A second rebound oil chamber is also disposed within the rebound oil circuit valve block, and the first and second rebound oil chambers are connected. The rebound air chamber is disposed between the outer and inner cylinders. A third rebound oil passage is provided on the rebound oil circuit valve block, through which oil in the second rebound oil chamber flows to the outside of the rebound air chamber. The oil pressure compresses the rebound airbag to form a rebound energy storage chamber; the compression oil circuit valve block is fixedly mounted on the outer cylinder, and a compression solenoid valve group is provided inside the compression oil circuit valve block. A second compression oil chamber is provided inside the compression oil circuit valve block, and the first compression oil chamber and the second compression oil chamber are connected; the compression airbag is located between the outer cylinder and the inner cylinder, and the compression airbag and the rebound airbag are arranged side by side, and the compression airbag and the rebound airbag are separated by an isolation ring; a third compression oil passage is provided on the compression oil circuit valve block, and the oil in the second compression oil chamber flows to the outside of the compression airbag through the third compression oil passage, and the oil pressure compresses the compression airbag to form a compression energy storage chamber.

[0006] Furthermore, a first rebound oil passage hole, a second rebound oil passage hole, and a first rebound oil path are provided between the first rebound oil chamber and the second rebound oil chamber. Oil flows from the first rebound oil chamber through the first rebound oil passage hole, the first rebound oil path, and the second rebound oil passage hole into the second rebound oil chamber.

[0007] Furthermore, a compression oil passage is provided between the first compression oil chamber and the second compression oil chamber, through which oil enters the second compression oil chamber from the first compression oil chamber or through the first compression oil passage from the second compression oil chamber.

[0008] Furthermore, a rebound inlet / outlet is provided on one side of the rebound oil circuit valve block, through which external oil enters the interior of the rebound oil circuit valve block; a compression inlet / outlet is provided on one side of the compression oil circuit valve block, through which external oil enters the interior of the compression oil circuit valve block.

[0009] Furthermore, a mounting base is provided on the outer wall of the outer cylinder, and the rebound oil circuit valve block and the compression oil circuit valve block are fixedly mounted on the mounting base.

[0010] Furthermore, a piston rod guide is provided inside the inner cylinder, the piston rod is disposed inside the piston rod guide, and the piston rod moves along the piston rod guide under the drive of an external force.

[0011] Furthermore, a protective sleeve for the rebound airbag is provided on the outside of the rebound airbag, and a protective sleeve for the compression airbag is provided on the outside of the compression airbag.

[0012] Compared with the prior art, the advantages of this utility model include:

[0013] 1) The active shock absorber for motor vehicles provided by this utility model has a simple and compact structure and is easy to install;

[0014] 2) The active shock absorber for motor vehicles provided by this utility model has a rebound energy storage chamber and a compression energy storage chamber that can absorb the energy of oil fluctuations to increase the reverse oil supply speed, and can also accommodate excess oil in the first compression chamber or the first rebound chamber.

[0015] 3) The active shock absorber for motor vehicles provided by this utility model can achieve both passive and active operation. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is an overall sectional view of an active shock absorber for motor vehicles provided in a typical embodiment of this utility model;

[0018] Figure 2 This is a partial cross-sectional view of an active shock absorber for motor vehicles provided in a typical embodiment of this utility model;

[0019] Figure 3 This is a schematic diagram showing the positions of the rebound oil inlet / outlet and the compression oil inlet / outlet provided in a typical embodiment of this utility model;

[0020] Figure 4 This is a schematic diagram of the movement of oil in an active shock absorber for motor vehicles when the piston rod moves to the right, provided in a typical embodiment of this utility model.

[0021] Figure 5 This is a schematic diagram of the movement of oil in an active shock absorber for motor vehicles when the piston rod moves to the left, provided in a typical embodiment of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Rebound oil circuit valve block; 2. Rebound solenoid valve assembly; 3. Compression solenoid valve assembly; 4. Compression oil circuit valve block; 5. Piston rod guide; 6. Piston rod; 7. First rebound oil chamber; 71. Second rebound oil chamber; 8. Rebound air bladder; 9. Piston; 10. First compression oil chamber; 101. Second compression oil chamber; 11. Outer cylinder; 12. Compression air bladder; 13. Inner cylinder; 14. Rebound inlet / outlet; 15. Compression inlet / outlet; 16. Isolation ring; 17. Rebound energy storage chamber; 18. Compression energy storage chamber; 19. Rebound air bladder protective sleeve; 20. Compression air bladder protective sleeve. Detailed Implementation

[0023] 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.

[0024] like Figure 1As shown, this utility model discloses an active shock absorber for motor vehicles. The active shock absorber includes an inner cylinder 13, an outer cylinder 11, a rebound oil circuit valve block 1, a rebound airbag 8, a compression oil circuit valve block 4, and a compression airbag 13. A piston 9 and a piston rod 6 are disposed inside the inner cylinder 13. The piston 9 is fixedly connected to one end of the piston rod 6 and is slidably connected to the inner wall of the inner cylinder 13. The piston 9 divides the interior of the inner cylinder 13 into a first rebound oil chamber 7 and a first compression oil chamber 10. The rebound oil circuit valve block 1 is fixedly disposed on the outer cylinder 11. The rebound oil circuit valve block 1 is provided with a rebound solenoid valve assembly 2 and a rebound inlet / outlet oil port 14, which is connected to an external hydraulic pump or electro-hydraulic pump. A second rebound oil chamber 71 is disposed inside the rebound oil circuit valve block 1, and the first rebound oil chamber 7 and the second rebound oil chamber 71 are connected. Specifically, a first rebound oil passage, a second rebound oil passage, and a first rebound oil path are provided between the first rebound oil chamber 7 and the second rebound oil chamber 71. When the piston rod 6 moves to the left, oil flows from the first rebound oil chamber 8 through the first rebound oil passage, the first rebound oil path, and the second rebound oil passage into the second rebound oil chamber 71. When the piston rod 6 moves to the right, oil flows from the second rebound oil chamber 71 through the second rebound oil passage, the first rebound oil path, and the first rebound oil passage into the first rebound oil chamber 7.

[0025] The rebound airbag 8 is disposed between the outer cylinder 11 and the inner cylinder 13. The rebound oil circuit valve block 1 is provided with a third rebound oil passage hole. The oil in the second rebound oil chamber 71 flows to the outside of the rebound airbag 8 through the third rebound oil passage hole. The oil squeezes the rebound airbag 8 to form a rebound energy storage chamber 17.

[0026] The compression oil circuit valve block is fixedly mounted on the outer cylinder 11. The compression oil circuit valve block contains a compression solenoid valve assembly 4 and a compression inlet / outlet port 15, which is connected to an external hydraulic pump or electro-hydraulic pump. The compression oil circuit valve block contains a second compression oil chamber 101, which is connected to the first compression oil chamber 10. Specifically, a compression oil passage is provided between the first compression oil chamber 10 and the second compression oil chamber 101. When the piston rod 6 moves to the right, oil flows from the first compression oil chamber 10 through the compression oil passage into the second compression oil chamber 101; when the piston rod 6 moves to the left, oil flows from the second compression oil chamber 101 through the first compression oil passage into the first compression oil chamber 10.

[0027] The compression airbag 12 is disposed between the outer cylinder 11 and the inner cylinder 13. The compression airbag 12 and the rebound airbag 8 are arranged side by side and separated by an isolation ring 16. The compression oil circuit valve block is provided with a third compression oil passage hole. The oil in the second compression oil chamber 101 flows to the outside of the compression airbag 12 through the third compression oil passage hole. The oil squeezes the compression airbag 12 to form a compression energy storage chamber 18.

[0028] The rebound energy storage chamber 17 and the compression energy storage chamber 18 are used to contain the oil that occupies space due to the volume of the piston rod 6.

[0029] like Figure 4 As shown, when the piston rod 6 moves to the right, the oil in the first compression chamber 10 is squeezed out by the piston rod 6 and enters the second compression chamber 101 through the compression oil passage. The oil in the second compression chamber 101 is divided into two paths. One path enters the compression energy storage chamber through the third compression oil passage. The compression energy storage chamber stores the oil and absorbs energy to provide the reverse oil supply speed. The other path enters the external hydraulic pump or electro-hydraulic pump through the compression inlet / outlet 15. At this time, the oil in the rebound energy storage chamber 17 flows into the second rebound chamber, and then enters the first rebound oil chamber 7 through the second rebound oil passage, the first rebound oil passage, and the first rebound oil passage.

[0030] like Figure 5 As shown, when the piston rod 6 moves to the left, the oil in the first rebound oil chamber 7 is squeezed out of the first rebound oil chamber 7 under the pressure of the piston rod 6, and sequentially passes through the first rebound oil passage, the first rebound oil path, and the second rebound oil passage into the second rebound oil chamber 71. The oil entering the second rebound oil chamber 71 is divided into two paths. One path of oil passes through the third rebound oil passage into the rebound energy storage chamber, which stores the oil and absorbs energy to provide the reverse oil supply speed. The other path of oil passes through the rebound inlet / outlet 14 into the external hydraulic pump or electro-hydraulic pump. At this time, the oil in the compression energy storage chamber flows into the second compression chamber and enters the first compression chamber through the first compression oil passage. This working mode is a passive working mode.

[0031] The structure of this application is simple and compact, and easy to install. The rebound energy storage chamber and the compression energy storage chamber in this application can absorb the energy of oil fluctuations to improve the reverse oil supply speed, and can also accommodate the excess oil in the first compression chamber or the first rebound chamber.

[0032] In some implementation examples, a rebound inlet / outlet port 14 is provided on one side of the rebound oil circuit valve block 1, through which external oil enters the interior of the rebound oil circuit valve block 1; a compression inlet / outlet port 15 is provided on one side of the compression oil circuit valve block, through which external oil enters the interior of the compression oil circuit valve block. During active operation, an external hydraulic pump or electro-hydraulic pump injects oil through the rebound inlet / outlet port 14, increasing the oil pressure in the first rebound oil chamber 7 and the second rebound oil chamber 71, thereby driving the piston rod 6 to perform a rebound motion; an external hydraulic pump or electro-hydraulic pump injects oil through the compression inlet / outlet port 15, increasing the oil pressure in the first compression oil chamber 10 and the second compression oil chamber 101, thereby driving the piston rod 6 to perform a compression motion.

[0033] In some implementation cases, a mounting base is provided on the outer side wall of the outer cylinder 11, and the rebound oil circuit valve block 1 and the compression oil circuit valve block are fixedly installed on the mounting base.

[0034] In some implementation cases, in order to ensure that the piston rod 6 moves axially along the outer cylinder 11, a piston rod guide 5 is provided inside the outer cylinder 11, the piston rod 6 is located inside the piston rod guide 5, and the piston rod 6 moves along the piston rod guide 5 under the drive of external force.

[0035] In some implementation cases, such as Figure 2 As shown, in order to protect the rebound airbag 8, a rebound airbag protective sleeve 19 is provided on the outside of the rebound airbag 8, and in order to protect the compression airbag 12, a compression airbag protective sleeve 20 is provided on the outside of the compression airbag 12.

[0036] 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 inner cylinder (13) is provided with a piston (9) and a piston rod (6). The piston (9) is fixedly connected to one end of the piston rod (6). The piston (9) slides on the inner wall of the inner cylinder (13). The piston (9) divides the interior of the inner cylinder (13) into a first rebound oil chamber (7) and a first compression oil chamber (10). A rebound oil circuit valve block (1) is fixedly installed on the outer cylinder (11). A rebound solenoid valve group (2) is installed inside the rebound oil circuit valve block (1). A second rebound oil chamber (71) is installed inside the rebound oil circuit valve block (1). The first rebound oil chamber (7) and the second rebound oil chamber (71) are connected. The rebound airbag (8) is located between the inner cylinder (13) and the outer cylinder (11). The rebound oil circuit valve block (1) is provided with a third rebound oil passage hole. The oil in the second rebound oil chamber (71) flows to the outside of the rebound airbag (8) through the third rebound oil passage hole. The oil squeezes the rebound airbag (8) to form a rebound energy storage chamber (17). A compression oil circuit valve block (4) is fixedly mounted on the outer cylinder (11). A compression solenoid valve group (3) is provided inside the compression oil circuit valve block (4). A second compression oil chamber (101) is provided inside the compression oil circuit valve block (4). The first compression oil chamber (10) and the second compression oil chamber (101) are connected. A compression airbag (12) is disposed between the inner cylinder (13) and the outer cylinder (11). The compression airbag (12) and the rebound airbag (8) are arranged side by side and separated by an isolation ring (16). A third compression oil passage hole is provided on the compression oil circuit valve block. The oil in the second compression oil chamber (101) flows to the outside of the compression airbag (12) through the third compression oil passage hole. The oil squeezes the compression airbag (12) to form a compression energy storage chamber (18).

2. An active shock absorber for motor vehicles according to claim 1, characterized in that: A first rebound oil passage hole, a second rebound oil passage hole, and a first rebound oil path are provided between the first rebound oil chamber (7) and the second rebound oil chamber (71). Oil enters the second rebound oil chamber (71) from the first rebound oil chamber (7) through the first rebound oil passage hole, the first rebound oil path, and the second rebound oil passage hole.

3. An active shock absorber for motor vehicles according to claim 1, characterized in that: A compression oil passage is provided between the first compression oil chamber (10) and the second compression oil chamber (101). Oil enters the second compression oil chamber (101) from the first compression oil chamber (10) through the compression oil passage, or oil enters the first compression oil chamber (10) from the second compression oil chamber (101) through the first compression oil passage.

4. An active shock absorber for motor vehicles according to claim 1, characterized in that: The rebound oil circuit valve block (1) has a rebound inlet / outlet port (14) on one side, through which external oil enters the interior of the rebound oil circuit valve block (1); the compression oil circuit valve block has a compression inlet / outlet port (15) on one side, through which external oil enters the interior of the compression oil circuit valve block.

5. An active shock absorber for motor vehicles according to claim 1, characterized in that: An installation seat is provided on the outer side wall of the outer cylinder (11), and the rebound oil circuit valve block (1) and the compression oil circuit valve block (4) are fixedly installed on the installation seat.

6. An active shock absorber for motor vehicles according to claim 1, characterized in that: A piston rod guide (5) is provided inside the inner cylinder (13), and the piston rod (6) is provided inside the piston rod guide (5), and the piston rod (6) moves along the piston rod guide (5) under the drive of external force.

7. An active shock absorber for motor vehicles according to claim 1, characterized in that: The outer side of the rebound airbag (8) is provided with a rebound airbag protective sleeve (19), and the outer side of the compression airbag (12) is provided with a compression airbag protective sleeve (20).

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