Integrated intermediate cylinder structure and double-valve electric control shock absorber

Abstract

The utility model relates to the technical field of vehicle shock absorbers, and discloses an integrated middle cylinder structure and a double-valve electric control shock absorber, the integrated middle cylinder structure comprises an integrated middle cylinder, the middle cylinder is arranged between an outer cylinder and an inner cylinder, and the middle cylinder is sleeved on the outer side of the inner cylinder; a first sealing piece, a second sealing piece and a third sealing piece are arranged between the middle cylinder and the inner barrel, a first oil cavity communicated with the compression electromagnetic valve is formed among the first sealing piece, the second sealing piece, the middle cylinder and the inner barrel, and a second oil cavity communicated with the springback electromagnetic valve is formed among the second sealing piece, the third sealing piece, the middle cylinder and the inner barrel. The compression oil way and the rebound oil way are formed through the integrally-formed middle cylinder, meanwhile, parts needing to be sealed on the middle cylinder can be reduced, the using number of sealing pieces is reduced, the structure is simple, assembling is convenient, and the production cost is low; the axial length of the middle cylinder can be set to be small, the structure is compact, and arrangement space is reserved for other components of the chassis.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle shock absorber technical field, specifically, relate to an integral type intermediate cylinder structure and double valve electric control shock absorber. BACKGROUND

[0002] With the development of intelligent chassis of automobile, the research and development of intelligent suspension also have made great progress, and the performance of shock absorber as an important part of suspension is increasingly powerful. Among many types of adjustable damping shock absorber, the current one used more is electronic hydraulic electric control shock absorber, and the principle is that the electromagnetic valve is built-in or external in the shock absorber, and the valve opening degree of the electromagnetic valve is controlled to finally realize the soft and hard change of the shock absorber. Some existing double external electromagnetic valve electric control shock absorber can realize the independent control of damping force of recovery and compression stroke, and the shock absorber is externally provided with compression electromagnetic valve and rebound electromagnetic valve (or recovery electromagnetic valve), and at the same time, the passive valve combination, namely piston valve and bottom valve, is retained.

[0003] The existing double external electromagnetic valve electric control shock absorber still has the following shortcomings and deficiencies: two intermediate cylinders are arranged, which are compression intermediate cylinder and rebound intermediate cylinder, the compression intermediate cylinder is communicated with the compression electromagnetic valve to form the oil path when the shock absorber is compressed, the rebound intermediate cylinder is communicated with the rebound electromagnetic valve to form the oil path when the shock absorber is rebounded, the rebound and compression form independent oil paths, complete decoupling is achieved on the oil path, the hysteresis caused by mechanical structure is avoided, the response time of the shock absorber is improved, and the demand of high-precision adjustment is met. But at the same time, it also brings the cost rise, for example, the compression intermediate cylinder and the rebound intermediate cylinder are designed in a split mode, so that the assembly process is complex, and the sealing property of the two intermediate cylinders is more difficult to guarantee; in addition, since the two intermediate cylinders are arranged in an upper and lower split mode (i.e. distributed along the axial direction of the cylinder body), the length of the cylinder body in the axial direction is often designed to be relatively long, so that the overall height of the electromagnetic valve is too high, which will occupy the arrangement space of other parts of the chassis, and cause the problem of difficult vehicle arrangement. SUMMARY

[0004] The utility model provides a kind of integrated intermediate cylinder structure, it is suitable for being set on double valve electric control shock absorber, the double valve electric control shock absorber includes outer tube, inner tube, compression solenoid valve and rebound solenoid valve, the integrated intermediate cylinder structure includes integrally formed intermediate cylinder, the intermediate cylinder is placed between the outer tube and the inner tube, the intermediate cylinder is sleeved on the outside of the inner tube, first sealing element, second sealing element and third sealing element are arranged between the intermediate cylinder and the inner tube, first oil cavity that is communicated with the compression solenoid valve is formed between the first sealing element, the second sealing element, the intermediate cylinder and the inner tube, second oil cavity that is communicated with the rebound solenoid valve is formed between the second sealing element, the third sealing element, the intermediate cylinder and the inner tube;The utility model forms compression oil circuit and rebound oil circuit by one integrally formed intermediate cylinder, can reduce the part that needs sealing on intermediate cylinder simultaneously, reduce the use quantity of sealing element, simple structure, it is convenient to assemble, and production cost is low;Intermediate cylinder axial length can be set smaller, compact structure, and other components are left out arrangement space for chassis.

[0005] Optionally, the inner tube is provided with a first through hole communicated with the first oil cavity, and the inner tube is provided with a second through hole communicated with the second oil cavity; a piston valve is slidably installed on the inner side of the inner tube, and a piston head is arranged on the piston valve; the piston head slides along the axial direction of the inner tube between the first through hole and the second through hole.

[0006] Optionally, the first sealing element, the second sealing element and the third sealing element are all annular sealing rings.

[0007] Optionally, a gap is arranged between the inner tube and the intermediate cylinder, the intermediate cylinder is non-contactly installed with the inner tube through the gap, and the first sealing element abuts between the inner tube and the intermediate cylinder.

[0008] Optionally, an outer protrusion is arranged on the intermediate cylinder, an installation groove for installing the first sealing element is formed on the inner side of the outer protrusion, and the side bottom surface of the installation groove is a plane.

[0009] Optionally, in the axial direction of the intermediate cylinder, the length L of the side bottom surface is greater than the diameter of the first sealing element, the first sealing element is coated with lubricating oil, and part of the lubricating oil on the first sealing element is accommodated in the installation groove when the first sealing element is installed in the installation groove.

[0010] Optionally, the outer cylinder is provided with a mounting guide column for mounting the compression electromagnetic valve, a valve core frame is connected between the compression electromagnetic valve and the intermediate cylinder, the valve core frame is arranged inside the mounting guide column, the intermediate cylinder is provided with a hollow guide column in communication with the first oil cavity, one end of the valve core frame is sleeved inside the hollow guide column, the other end of the valve core frame abuts on the compression electromagnetic valve, and the valve core frame is provided with a first channel for communicating the first oil cavity with an oil inlet of the compression electromagnetic valve.

[0011] Optionally, an oil storage cavity is formed between the outer cylinder and the inner cylinder, a second channel is arranged on the valve core frame for communicating the oil storage cavity with an oil outlet of the compression electromagnetic valve, a first sealing ring is arranged between the valve core frame and the hollow guide column, and a second sealing ring is arranged between the valve core frame and the oil inlet end of the compression electromagnetic valve.

[0012] Optionally, a magnet for adsorbing magnetic impurities is arranged in the first channel, the magnet is fixedly arranged on the inner wall of the first channel, and a guide inclined surface is arranged at a side opening of the first channel to facilitate the introduction of the magnet into the first channel.

[0013] Compared with the prior art, the integrated intermediate cylinder structure in the utility model can form compression oil paths and rebound oil paths through an integrally formed intermediate cylinder, can reduce the parts that need to be sealed on the intermediate cylinder, can reduce the number of sealing elements, has a simple structure, is convenient to assemble, and is low in production cost; the axial length of the intermediate cylinder can be arranged to be relatively small, the structure is compact, space is left for other components of the chassis, part of lubricating oil in the mounting groove can continuously lubricate the first sealing element during assembly, so that the lubricating property of the first sealing element during the installation process is ensured, wear is not prone to occurring, and the service life and sealing performance of the first sealing element are improved; the magnet for adsorbing magnetic impurities is arranged in the first channel, so that the magnetic impurities are prevented from entering the oil paths to cause blockage and other problems and affect the damping performance; the guide inclined surface is arranged at the side opening of the first channel to facilitate the introduction of the magnet into the first channel, and the assembly difficulty is reduced.

[0014] In addition, the utility model also provides a double-valve electric control shock absorber which comprises the integrated intermediate cylinder structure, and the double-valve electric control shock absorber also has the beneficial effects of the integrated intermediate cylinder structure, and details are not repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a front view of the integrated intermediate cylinder structure of the utility model;

[0016] Figure 2 It is a sectional view of the integrated intermediate cylinder structure of the utility model;

[0017] Figure 3 is Figure 2 is an enlarged view of the middle A part;

[0018] Figure 4 is Figure 2 is an enlarged view of the middle B part;

[0019] Figure 5 is a structure schematic view of the integrated middle cylinder structure according to the present application;

[0020] Figure 6 is Figure 5 is an enlarged view of the middle C part;

[0021] Figure 7 is a structure schematic view of the rebound solenoid valve part of the integrated middle cylinder structure according to the present application;

[0022] Corresponding component names of various reference numerals in the figure are as follows: 1 is an outer cylinder, 101 is a mounting guide column, 102 is an oil storage cavity, 2 is an inner cylinder, 201 is a first through hole, 202 is a second through hole, 3 is a compression solenoid valve, 301 is an oil inlet, 302 is an oil outlet, 4 is a rebound solenoid valve, 5 is a middle cylinder, 501 is a gap, 502 is an outer protruding block, 503 is a mounting groove, 504 is a side bottom surface, 505 is a hollow guide column, 506 is a sleeving guide column, 61 is a first sealing element, 62 is a second sealing element, 63 is a third sealing element, 71 is a first oil cavity, 72 is a second oil cavity, 8 is a piston valve, 81 is a piston head, 9 is a valve core frame, 901 is a first channel, 902 is a second channel, 903 is a first sealing ring, 904 is a second sealing ring, 905 is a guide inclined surface, 10 is a magnet, and L is a length. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0024] In the description of the present application, it should be understood that the terms "upper", "lower", etc. indicate the orientation or positional relationship based on the orientation or positional relationship when the product is normally used.

[0025] The terms "first", "second", etc. are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features.

[0026] Reference Figures 1-7The utility model discloses an integrated intermediate cylinder structure is suitable for being arranged on the double valve electric control shock absorber, and the double valve electric control shock absorber includes outer tube 1, inner tube 2, compression electromagnetic valve 3 and rebound electromagnetic valve 4, and the integrated intermediate cylinder structure includes integrally formed intermediate cylinder 5, and the intermediate cylinder 5 is placed between outer tube 1 and inner tube 2, the intermediate cylinder 5 is sleeved on the outside of inner tube 2, and the first sealing piece 61, the second sealing piece 62 and the third sealing piece 63 are arranged between the intermediate cylinder 5 and inner tube 2, the first sealing piece 61, the second sealing piece 62, the intermediate cylinder 5 and inner tube 2 form the first oil cavity 71 that communicates with compression electromagnetic valve 3, that is, the first oil cavity 71 is the partial oil circuit of compression oil circuit, the second sealing piece 62, the third sealing piece 63, the intermediate cylinder 5 and inner tube 2 form the second oil cavity 72 that communicates with rebound electromagnetic valve 4, that is, the second oil cavity 72 is the partial oil circuit of rebound oil circuit;The utility model discloses an integrally formed intermediate cylinder, to form compression oil circuit and rebound oil circuit, can reduce the position that needs sealing on the intermediate cylinder simultaneously, reduces the use number of sealing piece, simple structure, convenient to assemble, and low in production cost;The intermediate cylinder axial length can be set smaller, so as to be able to reduce the interval between compression electromagnetic valve 3 and rebound electromagnetic valve 4, and the structure is compact, and other components are left to arrange space for chassis;In prior art, two sealing pieces are installed on two intermediate cylinders to seal, compared with three sealing pieces in the structure, the number of sealing pieces is more, and assembly is more troublesome, and the risk of leakage of sealing also increases.

[0027] Referring to Figure 2 、 Figure 3 and Figure 5 , the first through hole 201 that communicates with the first oil cavity 71 is formed in the inner tube 2, and the second through hole 202 that communicates with the second oil cavity 72 is formed in the inner tube 2;The piston valve 8 is slidably installed on the inner side of the inner tube 2, the piston head 81 is arranged on the piston valve 8, the piston head 81 slides along the axial direction of the inner tube 2 between the first through hole 201 and the second through hole 202, the piston valve 8 can be subjected to the damping force generated by the compression electromagnetic valve 3 when being compressed downwards, and the piston valve 8 can be subjected to the damping force generated by the rebound electromagnetic valve 4 when rebounding upwards, thereby playing a shock-absorbing function;The first sealing piece 61, the second sealing piece 62 and the third sealing piece 63 are all annular sealing rings, simple structure, low in use cost.

[0028] Referring to Figures 2-4, the gap 501 is arranged between the inner cylinder 2 and the intermediate cylinder 5, the intermediate cylinder 5 is non-contact mounted with the inner cylinder 2 through the gap 501, the first sealing piece 61 is abutted and sealed between the inner cylinder 2 and the intermediate cylinder 5, the inner cylinder 2 and the intermediate cylinder 5 are non-contact mounted, so that the intermediate cylinder 5 presses the first sealing piece 61 on the outer wall of the inner cylinder 2, so as to improve the sealing performance; the outer lug 502 is arranged on the intermediate cylinder 5, the inner side of the outer lug 502 is formed with the mounting groove 503 for mounting the first sealing piece 61, the side bottom surface 504 of the mounting groove 503 is a plane or close to a plane, the first sealing piece 61 is in contact with the planar side bottom surface 504, the contact area is small, so as to extrude the first sealing piece 61 to elastically deform, the first sealing piece 61 is tightly abutted against the intermediate cylinder and the inner cylinder by the elastic force, and the sealing performance of the first sealing piece 61 is improved; in the axial direction of the intermediate cylinder 5, the length L of the side bottom surface 504 is greater than the diameter of the first sealing piece 61, when the first sealing piece 61 is assembled, the first sealing piece 61 is coated with lubricating oil, when the first sealing piece 61 is mounted in the mounting groove 503, part of the lubricating oil on the first sealing piece 61 is accommodated in the mounting groove 503, and the part of the lubricating oil in the mounting groove 503 can continuously lubricate the first sealing piece 61, so as to ensure the lubricating property of the first sealing piece 61 in the mounting process, and the first sealing piece 61 is not easy to wear and the service life and sealing performance of the first sealing piece 61 are improved.

[0029] Referring to Figure 1 , the outer cylinder 1 is provided with the mounting guide column 101 for mounting the compression electromagnetic valve 3, the compression electromagnetic valve 3 is connected with the valve core frame 9, the valve core frame 9 is arranged on the inner side of the mounting guide column 101, the hollow guide column 505 is arranged on the intermediate cylinder 5 and communicates with the first oil cavity 71, one end of the valve core frame 9 is sleeved on the inner side of the hollow guide column 505, and after the sleeve, the intermediate cylinder 5 is not easy to axially displace and is stably mounted.

[0030] Referring to Figure 2 , Figure 5 , Figure 6 and Figure 7 , the oil storage cavity 102 is formed between the outer cylinder 1 and the inner cylinder 2, the second passage 902 is arranged on the valve core frame 9 and is used for connecting the oil storage cavity 102 with the oil outlet 302 of the compression electromagnetic valve 3; the first sealing ring 903 is arranged between the valve core frame 9 and the hollow guide column 505, and the second sealing ring 904 is arranged between the valve core frame 9 and the inlet end of the compression electromagnetic valve 3, so that the sealing effect is improved and the leakage problem is avoided. Figure 6The compression oil path in the arrow direction is as follows: when the piston valve 8 slides downward in compression, the oil in the inner cylinder 2 flows from the first through hole 201, through the first oil cavity 71, the first channel 901, the oil inlet 301, the inside of the compression electromagnetic valve 3, the oil outlet 302, the second channel 902 and the oil storage cavity 102 in sequence; refer to Figure 7 The rebound electromagnetic valve is provided with another valve core frame 9 on one side to realize the function of the rebound oil path, and the flow direction of the rebound oil path (refer to Figure 7 the arrow direction) is similar to the compression oil path, and will not be described here; the middle cylinder 5 is provided with a sleeve guide column 506 for sleeving the valve core frame 9, and the punching hole position on the inner side of the sleeve guide column 506 is matched with the punching hole position on the inner side of the hollow guide column 505; the positions of the two hole positions can be set according to design requirements, and the punching is performed on one middle cylinder part, so that the processing cost is low, and the accuracy of the two punching hole positions is easy to guarantee; for example, in the design of some shock absorber structures, the compression electromagnetic valve 3 and the rebound electromagnetic valve 4 need to be arranged at an angle along the circumferential direction of the outer cylinder 1, so that the corresponding positions of the middle cylinder need to be punched, and the integrated middle cylinder structure can reduce the processing cost.

[0031] refer to Figure 5 and Figure 6 The first channel 901 is provided with a magnet 10 for adsorbing magnetic impurities, so as to avoid the magnetic impurities from entering the oil path and causing problems such as blockage, thereby affecting the shock absorption performance; the magnet 10 is tightly fitted and fixed to the inner wall of the first channel 901, and the side opening of the first channel 901 is provided with a guide slope 905 for facilitating the introduction of the magnet 10 into the first channel 901 and the fixation, thereby reducing the assembly difficulty; the magnet 10 is in the shape of a cuboid, and the two ends of the magnet 10 are respectively fixed to the inner wall of the first channel 901.

[0032] The integrated middle cylinder structure in the utility model can form a compression oil path and a rebound oil path through one integrally formed middle cylinder, can reduce the parts that need to be sealed on the middle cylinder, can reduce the number of sealing elements, is simple in structure, convenient to assemble, and low in production cost; the axial length of the middle cylinder can be set to be relatively small, the structure is compact, space is left for other parts of the chassis, part of the lubricating oil in the mounting groove can continuously lubricate the first sealing element during assembly, so as to ensure the lubricity of the first sealing element during the installation process, the first sealing element is not easy to wear and tear, the service life and the sealing performance of the first sealing element are improved, the first channel is provided with a magnet for adsorbing magnetic impurities, so as to avoid the magnetic impurities from entering the oil path and causing problems such as blockage, thereby affecting the shock absorption performance; the side opening of the first channel is provided with a guide slope for facilitating the introduction of the magnet into the first channel and the fixation, thereby reducing the assembly difficulty.

[0033] In addition, the utility model still provides a kind of double valve electric control shock absorber, including the integrated intermediate cylinder structure of above, and this double valve electric control shock absorber also has the beneficial effects of the integrated intermediate cylinder structure described above, and here no longer repeat.

[0034] The above is only the preferred embodiment of the utility model, it should be pointed out that, for the ordinary skilled person in the art, without departing from the technical principle of the utility model, can make several improvements and refinements, these improvements and refinements also should be regarded as the protection scope of the utility model.

Claims

1. An integrated intermediate cylinder structure adapted to be provided in a twin valve electronically controlled shock absorber including an outer cylinder (1), an inner cylinder (2), a compression electromagnetic valve (3), and a rebound electromagnetic valve (4), characterized by, The integrated intermediate cylinder structure comprises an integrated intermediate cylinder (5) arranged between the outer cylinder (1) and the inner cylinder (2), the intermediate cylinder (5) is sleeved outside the inner cylinder (2), and the first sealing element (61), the second sealing element (62) and the third sealing element (63) are arranged between the intermediate cylinder (5) and the inner cylinder (2), the first sealing element (61), the second sealing element (62), the intermediate cylinder (5) and the inner cylinder (2) form a first oil cavity (71) in communication with the compression electromagnetic valve (3), and the second sealing element (62), the third sealing element (63), the intermediate cylinder (5) and the inner cylinder (2) form a second oil cavity (72) in communication with the rebound electromagnetic valve (4).

2. The one-piece center housing structure of claim 1, wherein The inner cylinder (2) is provided with a first through hole (201) in communication with the first oil cavity (71), and is provided with a second through hole (202) in communication with the second oil cavity (72); the inner cylinder (2) is slidably provided with a piston valve (8) on the inner side, and the piston valve (8) is provided with a piston head (81), and the piston head (81) slides in the axial direction of the inner cylinder (2) between the first through hole (201) and the second through hole (202).

3. The one-piece center housing structure of claim 1, wherein The first sealing element (61), the second sealing element (62) and the third sealing element (63) are all annular sealing rings.

4. The one-piece center housing structure of claim 1, wherein The inner cylinder (2) and the intermediate cylinder (5) are provided with a gap (501), the intermediate cylinder (5) is non-contact mounted with the inner cylinder (2) through the gap (501), and the first sealing element (61) abuts between the inner cylinder (2) and the intermediate cylinder (5).

5. The one-piece center housing structure of claim 1, wherein, The intermediate cylinder (5) is provided with an outer protrusion (502), the inner side of the outer protrusion (502) is formed with a mounting groove (503) for mounting the first sealing element (61), and the side bottom surface (504) of the mounting groove (503) is a plane.

6. The one-piece center housing structure of claim 5, wherein In the axial direction of the intermediate cylinder (5), the length (L) of the side bottom surface (504) is greater than the diameter of the first sealing element (61), the first sealing element (61) is coated with lubricating oil, and when the first sealing element (61) is mounted in the mounting groove (503), part of the lubricating oil on the first sealing element (61) is contained in the mounting groove (503).

7. The one-piece center housing structure of claim 1, wherein The outer cylinder (1) is provided with a mounting guide column (101) for mounting the compression electromagnetic valve (3), the compression electromagnetic valve (3) is connected with the intermediate cylinder (5) through a valve core frame (9), the valve core frame (9) is arranged inside the mounting guide column (101), the intermediate cylinder (5) is provided with a hollow guide column (505) in communication with the first oil cavity (71), one end of the valve core frame (9) is sleeved inside the hollow guide column (505), the other end of the valve core frame (9) abuts against the compression electromagnetic valve (3), the valve core frame (9) is provided with a first channel (901), and the first channel (901) is used for communicating the first oil cavity (71) with an oil inlet (301) of the compression electromagnetic valve (3).

8. The one-piece center housing structure of claim 7, wherein The outer cylinder (1) and the inner cylinder (2) form an oil storage cavity (102), the valve core frame (9) is provided with a second channel (902), the second channel (902) is used for communicating the oil storage cavity (102) with an oil outlet (302) of the compression electromagnetic valve (3), the valve core frame (9) and the hollow guide column (505) are provided with a first sealing ring (903), and the valve core frame (9) and the inlet end of the compression electromagnetic valve (3) are provided with a second sealing ring (904).

9. The one-piece center housing structure of claim 7, wherein, The first channel (901) is provided with a magnet (10) for adsorbing magnetic impurities, the magnet (10) is fixedly arranged on the inner wall of the first channel (901), and the side opening of the first channel (901) is provided with a guide inclined surface (905) for facilitating the introduction of the magnet (10) into the first channel (901).

10. A twin valve electronically controlled shock absorber characterized by comprising: The integrated intermediate cylinder structure comprises the integrated intermediate cylinder structure as claimed in any one of claims 1-9. The integrated intermediate cylinder structure comprises the integrated intermediate cylinder structure as claimed in any one of claims 1-9.

Images