Floating pipe

Abstract

The utility model provides a floating pipe which comprises a third cylinder connected to a working cylinder in a sleeved mode, and a circular communicating hole is formed in the outer wall of the working cylinder. The outer side of the edge of the circular communicating hole is provided with a chamfer, and the chamfer extends towards the working cylinder front end cover and the working cylinder rear end cover respectively, so that damage to the first sealing ring and the second sealing ring caused by the sharp edge of the communicating hole in the assembly or maintenance process of the shock absorber is avoided, the assembly difficulty between the working cylinder and the third cylinder is reduced, and the service life of the shock absorber is prolonged. And the maintenance difficulty of the shock absorber is reduced. Besides, due to the fact that the third cylinder is connected to the outer wall of the working cylinder in a sleeving mode from the upper direction or the lower direction in the assembling process, the working cylinder can be flexibly assembled in the upper direction and the lower direction through the spherical design of the communicating holes, and the assembling difficulty between the third cylinder and the working cylinder is further reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical engineering, and in particular relates to a floating pipe. Background Art

[0002] As is known to all, automobile suspension refers to a series of force transmission devices connecting the vehicle frame (or load-bearing body) and the axle (or wheel); its function is to bear the load in all directions of the vehicle, transmit power and provide cushioning, etc. At present, automobile suspension systems are generally divided into three categories: traditional passive, semi-active and active. Most passive shock absorbers (ordinary shock absorbers) installed on existing cars are extension shock absorbers, with a fully sealed working cylinder, a piston on the piston rod, and a damping hole located on the piston, which divides the working cylinder into two chambers, upper and lower. However, for cars driving on complex road conditions, passive shock absorbers cannot meet the requirements of effective vibration reduction at all driving speeds and conditions, and it is difficult to meet the comfort, handling stability and safety requirements of modern cars. This led to the development of semi-active (electronically controlled) shock absorbers, which add solenoid valves (external and internal) and a third cylinder to passive (conventional) shock absorbers. While driving, different suspension modes are selected, and the controller inputs different currents, causing the solenoid valves to adjust the damping force of the shock absorber. Setting the damping force to "hard" improves vehicle handling stability, while setting it to "soft" enhances ride comfort. Existing external electronically controlled shock absorbers, due to the addition of a third cylinder and sealing ring, require assembly with a working cylinder (with a hole). During assembly, the hole easily scratches the sealing ring, resulting in low reliability. Utility Model Content

[0003] The utility model provides a floating pipe, which reduces the difficulty of assembling between the working cylinder and the third cylinder.

[0004] The utility model provides a floating pipe, comprising: a third cylinder, a working cylinder, a first sealing ring, a second sealing ring and a circular communicating hole;

[0005] The third cylinder sleeve is arranged on the working cylinder;

[0006] The outer wall of the third cylinder is provided with a first mounting groove and a second mounting groove respectively; the first sealing ring and the second sealing ring are respectively arranged in the first mounting groove and the second mounting groove;

[0007] A circular communicating hole is provided on the outer wall of the working cylinder;

[0008] The outer side of the edge of the circular communicating hole is provided with a chamfer, and the chamfers extend toward the front end cover and the rear end cover of the working cylinder respectively.

[0009] Furthermore, the circular communicating hole is circumferentially arranged on the outer wall of the third cylinder.

[0010] Furthermore, the number of the circular communicating holes is 4-8.

[0011] Furthermore, in this embodiment, two chamfers are respectively provided at the edges of the circular communicating hole, and the chamfers are symmetrically arranged about the central axis of the circular communicating hole.

[0012] Furthermore, the length of the chamfer along the axial direction ranges from 10 mm to 30 mm.

[0013] Furthermore, two third cylinders are included.

[0014] Furthermore, the depth of the circular connecting hole is 0.05mm-0.25mm.

[0015] Furthermore, a flow gap is provided between the third cylinder and the working cylinder.

[0016] Furthermore, the inner side of the edge of the circular connecting hole is also provided with a rounded corner.

[0017] Furthermore, the radius of the fillet is in the range of 36 mm to 50 mm.

[0018] Compared with the prior art, the present invention has at least the following technical effects:

[0019] The floating tube provided by this utility model has a circular connecting hole on the outer wall of the working cylinder. The edges of the circular connecting hole are chamfered, extending toward the front and rear ends of the working cylinder. This prevents damage to the first and second sealing rings caused by the sharp edges of the connecting hole during assembly or maintenance of the shock absorber, thereby reducing the difficulty of assembling the working and third cylinders, as well as the difficulty of shock absorber maintenance. Furthermore, the circular design of the connecting hole allows for flexible assembly of the working cylinder in both vertical and horizontal directions, further reducing the difficulty of assembling the working and third cylinders. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of the floating tube in Example 1 of the present utility model;

[0021] Figure 2 This is a schematic structural diagram of the circular communicating hole in the floating tube in the first embodiment of the present utility model;

[0022] Figure 3 This is a schematic structural diagram of the circular communicating hole in the floating tube in the first embodiment of the present utility model;

[0023] Figure 4 This is another structural schematic diagram of the floating tube in the first embodiment of the present utility model;

[0024] Figure 5This is another structural schematic diagram of the floating tube in the second embodiment of the present invention. DETAILED DESCRIPTION

[0025] The following description of a floating tube according to the present invention is based on schematic diagrams, which illustrate preferred embodiments of the present invention. It should be understood that those skilled in the art may modify the present invention described herein while still achieving the beneficial effects of the present invention. Therefore, the following description should be understood as a general guide for those skilled in the art and is not intended to limit the present invention.

[0026] The following paragraphs describe the present invention in more detail by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are greatly simplified and not to exact scale, and are intended solely to facilitate and clearly illustrate the embodiments of the present invention.

[0027] Example 1

[0028] Please refer to Figures 1-4 , this embodiment discloses a floating tube, comprising: a third cylinder 7, a working cylinder 1, a first sealing ring 3, a second sealing ring 6 and a circular communicating hole 4;

[0029] The third cylinder 7 is sleeved on the working cylinder 1;

[0030] The outer wall of the third cylinder 7 is provided with a first mounting groove 2 and a second mounting groove 5 respectively; the first sealing ring 3 and the second sealing ring 6 are respectively arranged in the first mounting groove 2 and the second mounting groove 5;

[0031] A circular connecting hole 4 is provided on the outer wall of the working cylinder 1;

[0032] Chamfers 300 are provided at the edges of the circular communicating hole, and the chamfers 300 extend toward the front end cover 100 and the rear end cover 200 of the working cylinder respectively.

[0033] Specifically, along the direction toward the front end cover and the rear end cover of the working cylinder 1 , the edges on both sides of the chamfer 300 gradually approach the axial center axis of the circular communicating hole.

[0034] In this embodiment, a circular connecting hole 4 is provided on the outer wall of the working cylinder 1, and the edges of the circular connecting hole 4 are provided with chamfers 300 extending toward the front and rear ends of the working cylinder 1. This prevents damage to the first and second sealing rings 3 and 6 due to the sharp edges of the connecting hole during assembly or maintenance of the shock absorber, thereby reducing the difficulty of assembly and maintenance between the third cylinder 7 and the working cylinder 1. In addition, since the third cylinder 7 is fitted onto the outer wall of the working cylinder 1 from either the top or bottom during assembly, the circular design of the connecting hole allows for flexible assembly of the working cylinder 1 in both the top and bottom directions, further reducing the difficulty of assembly between the third cylinder 7 and the working cylinder 1.

[0035] Furthermore, by performing sealing treatment on the first sealing ring 3 and the second sealing ring 6 matched with the third cylinder 7, the structure of the entire floating tube is simplified, easy to assemble, and has high sealing reliability.

[0036] Please refer to Figure 1-Figure 3 In a specific embodiment, two identical chamfers 300 are respectively provided at the edges of the circular communicating hole 4, and the chamfers 300 are symmetrically arranged about the central axis of the circular communicating hole 4. The central axis includes the central axis in the axial direction and the central axis in the radial direction.

[0037] In another specific embodiment, the length of the two chamfers 300 in the axial direction ranges from 10 mm to 30 mm, for example, 10 mm, 12 mm, 15 mm, and 20 mm.

[0038] Furthermore, in this embodiment, a rounded corner 400 is provided at the inner edge of the circular communicating hole 4 , that is, the edge of the circular communicating hole 4 is not a sharp right angle, but is processed into an arc shape with a certain radius.

[0039] In a specific embodiment, the radius of the rounded corner 400 is 36 mm-50 mm, for example, 37 mm, 39 mm, 40 mm and 48 mm.

[0040] In this embodiment, by providing a rounded corner 400 at the inner edge of the circular communicating hole 4, the circular communicating hole no longer has a sharp edge, further reducing the risk of injury during assembly or maintenance.

[0041] In a specific embodiment, the first sealing ring 3 and the second sealing ring 6 are respectively clamped in the first installation groove 2 and the second installation groove 5 .

[0042] In a specific embodiment, the first mounting groove 2 and the second mounting groove 5 are circular, and the two mounting grooves are sequentially installed at different heights on the outer wall of the third cylinder 7. Those skilled in the art can select the shape and installation position of the mounting groove according to actual conditions, and no specific limitation is made here.

[0043] In another specific embodiment, the inner wall of the third cylinder 7 and the outer wall of the working cylinder 1 are interference fit, so that the third cylinder 7 and the working cylinder 1 are movably connected.

[0044] In this embodiment, the circular communicating hole 4 is circumferentially arranged on the outer wall of the third cylinder 7 .

[0045] Furthermore, in this embodiment, the distances between any two of the circular communicating holes 4 may be the same or different. The circular communicating holes 4 may have height differences or may all be arranged at the same height.

[0046] In a specific embodiment, the number of the circular communicating holes 4 is 4-8, for example, 5, 6, 8, etc.

[0047] In another specific embodiment, the diameter of the circular communicating hole 4 is φ5-φ10, for example, φ6, φ8, and φ10.

[0048] In another specific embodiment, the depth of the circular communicating hole 4 is in the range of 0.05 mm to 0.25 mm, such as 0.06 mm, 0.08 mm, and 0.20 mm.

[0049] It is understandable that the number, aperture size and depth range of the circular communicating holes 4 are selected according to specific circumstances and are not limited here.

[0050] Please refer to Figure 4 In this embodiment, an opening 8 is further provided on the side wall of the third cylinder 7. The opening 8 is used to pass the working fluid. The shape and size of the opening 8 are selected according to the actual requirements for the passage of the working fluid and are not specifically limited here.

[0051] In a specific embodiment, an opening 8 is provided on the side wall of the third cylinder 7 , and the opening 8 is provided on a side close to the second sealing ring 6 .

[0052] In a specific embodiment, the opening 8 can be circular, oval or square, which is not particularly limited herein.

[0053] Furthermore, in this embodiment, a flow gap 9 is provided between the third cylinder 7 and the working cylinder 1 . The size range of the flow gap 9 can be selected according to actual conditions, and the gap 9 allows the working fluid to pass through.

[0054] When the floating tube structure described above is installed within the shock absorber, the operating principle is as follows: During compression and recovery, the oil within the shock absorber flows out of the spherical connecting hole at the top of the working cylinder 1, into the gap 9 between the third cylinder 7 and the working cylinder 1, then through the circular opening 8 in the connecting hole into the solenoid valve, and then through the external solenoid valve into the outer cylinder. The sealing effect of the first and second sealing rings 3 and 6 prevents the oil from flowing only through the spherical connecting hole into the gap 9 between the third cylinder 7 and the working cylinder 1, and then through the opening 8 in the third cylinder 7 into the external solenoid valve.

[0055] In a specific embodiment, the working fluid is oil.

[0056] In summary, the floating tube provided by the present invention has a circular connecting hole 4 on the outer wall of the working cylinder 1. The edges of the circular connecting hole 4 are provided with chamfers 300 extending toward the front and rear ends of the working cylinder 1. This prevents damage to the first and second sealing rings 3 and 6 due to the sharp edges of the connecting hole during assembly or maintenance of the shock absorber, thereby reducing the difficulty of assembly between the working cylinder 1 and the third cylinder 7, and also reducing the difficulty of shock absorber maintenance. The circular design of the connecting hole allows for flexible assembly of the working cylinder 1 in both vertical and horizontal directions, further reducing the difficulty of assembly between the third cylinder 7 and the working cylinder 1.

[0057] Example 2

[0058] Please refer to Figure 5 This embodiment provides a floating pipe, including two third cylinders 7 sleeved on the working cylinder 1.

[0059] Specifically, the two third cylinders 7 are sequentially sleeved onto the working cylinder 1 in the axial direction and are movably connected to the working cylinder 1 via an interference fit. A mounting spacing is provided between the two third cylinders 7, and the spacing can be adjusted to suit different application requirements. The effective stroke of the working cylinder 1 can be adjusted by changing the mounting position of the two third cylinders 7. The axial lengths of the two third cylinders 7 can be different or the same, and are not specifically limited here.

[0060] Furthermore, the outer walls of the two third cylinders 7 are each provided with a first mounting groove 2 and a second mounting groove 5, respectively. A first sealing ring 3 and a second sealing ring 6 are respectively installed in the first mounting groove 2 and the second mounting groove 5. An opening 8 is also provided on the outer wall of the third cylinder 7, near the second sealing ring 6. Circular connecting holes 4 are evenly distributed around the outer wall of each working cylinder 1. The inner edges of the circular connecting holes 4 are rounded 400, and the outer edges are provided with two chamfers 300, extending toward the front and rear end covers 100 and 200, respectively.

[0061] In this embodiment, the size and number of the circular connecting holes 4 are the same as those described in Example 1, and the technical effects achieved are also the same as those brought about by the circular connecting holes 4 described in Example 1, so they will not be repeated here.

[0062] It is understood that in a shock absorber, a solenoid valve is a valve that opens and closes through electromagnetic force. It is typically connected to the working cylinder 1 via a battery valve mounting base. In this embodiment, the addition of a second, third cylinder 7 enables a dual-valve structure for the electronically controlled shock absorber. The two solenoid valves, one for restoring and the other for compression, control the restoring and compression damping forces, respectively, further optimizing vehicle comfort.

[0063] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A floating pipe, characterized in that: include: a third cylinder, a working cylinder, a first sealing ring, a second sealing ring and a circular communicating hole; The third cylinder sleeve is arranged on the working cylinder; The outer wall of the third cylinder is provided with a first mounting groove and a second mounting groove respectively; the first sealing ring and the second sealing ring are respectively arranged in the first mounting groove and the second mounting groove; A circular communicating hole is provided on the outer wall of the working cylinder; The outer side of the edge of the circular communicating hole is provided with a chamfer, and the chamfers extend toward the front end cover and the rear end cover of the working cylinder respectively.

2. The floating pipe according to claim 1, wherein: The circular communicating hole is circumferentially arranged on the outer wall of the third cylinder.

3. The floating pipe according to claim 2, wherein: The number of the circular communicating holes is 4-8.

4. The floating pipe according to claim 1, wherein: Two chamfers are respectively provided on the outer sides of the edges of the circular communicating holes, and the chamfers are symmetrically arranged about the central axis of the circular communicating holes.

5. The floating pipe according to claim 4, wherein: The length of the chamfer in the axial direction ranges from 10 mm to 30 mm.

6. The floating pipe according to claim 1, wherein: The third cylinder comprises two.

7. The floating pipe according to claim 1, wherein: The depth of the circular communicating hole is 0.05 mm to 0.25 mm.

8. The floating pipe according to claim 1, wherein: A flow gap is provided between the third cylinder and the working cylinder.

9. The floating pipe according to claim 1, wherein: The inner side of the edge of the circular communicating hole is also provided with a rounded corner.

10. The floating pipe according to claim 9, wherein: The radius of the fillet is in the range of 36 mm to 50 mm.

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