Piston with improved damping oil duct structure

Abstract

The piston with the improved damping oil duct structure comprises a piston body, an oil hole is formed in the piston body and penetrates through the piston body, the oil hole is provided with an oil inlet and an oil outlet, and the end face of the piston body is further provided with a first shallow groove, a first deep groove, a second shallow groove and a second deep groove. The first deep groove and the second shallow groove are arranged close to the center of the piston body, the first deep groove is communicated with the oil inlet, the second shallow groove is communicated with the oil outlet, the first shallow groove and the second deep groove are arranged close to the outer edge of the piston body, the second deep groove is communicated with the second shallow groove, the first shallow groove is communicated with the first deep groove, and the first shallow groove leads to the outside of the piston body. The first shallow groove, the first deep groove, the oil hole, the second shallow groove and the second deep groove are matched to form a damping oil channel, the oil hole is not prone to interfering with the annular groove, the deep and shallow groove design ensures that oil pushes away the valve plate at low speed, the response speed is increased, and meanwhile valve plate deformation caused by oil impact at high speed is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of piston, especially a piston with improved damping oil channel structure. BACKGROUND

[0002] The outer peripheral wall of the piston is usually provided with an annular groove, which is usually used for mounting a sealing ring, a piston ring, etc., and the piston is internally provided with an oil hole, which penetrates through both ends of the piston, and the two ends of the oil hole are respectively provided with an oil inlet and an oil outlet, and the oil hole generates damping through oil, and the piston is further provided with a valve plate in sealing cooperation with the oil outlet, which can effectively prevent the reverse flow of oil, and the oil in the oil hole acts on the valve plate to open the valve plate, so that the oil passes through, and in the usual case, the oil hole is arranged on the piston end face close to the outer edge, and the advantage of this design is that the closer the oil hole is to the outer edge, the easier it is to generate a force on the valve plate, thereby more efficiently pushing open the valve plate, however, in actual application, especially in some specific product designs, the annular groove is sometimes relatively deep to accommodate thicker or more complex sealing rings, piston rings, etc., for example, the annular groove may need to accommodate multiple sealing rings to ensure sealing effect, or the annular groove may need to accommodate a combined piston ring to improve sealing performance and durability, etc., in this case, if the oil hole is still arranged close to the outer edge, it is easy to interfere with the annular groove, affecting the performance of the piston, in order to avoid this situation, the position of the oil hole needs to be closer to the center of the piston to avoid the interference of the annular groove. However, the closer the oil hole is designed to the center of the piston, the greater the pushing force required to push open the valve plate, and sometimes it may even be difficult to push, seriously affecting the normal operation of the piston, so it is necessary to improve. SUMMARY

[0003] The utility model discloses a kind of pistons with improved damping oil channel structure, and the structure is simple and reasonable, easy to operate, and the design of deep and shallow groove ensures that oil pushes open valve plate at low speed, improves response speed, and simultaneously prevents oil impact at high speed from causing valve plate deformation.

[0004] To achieve the above object, the utility model adopts the following technical solutions:

[0005] The utility model discloses a piston with improved damper oil channel structure, including piston body, be provided with a plurality of oil hole in the piston body, and the both ends of oil hole are through the piston body, the one end of oil hole is provided with the oil inlet, and the other end of oil hole is provided with the oil outlet, still be provided with the first shallow groove and the first deep groove with the oil inlet corresponding cooperation on the end face of piston body, the second shallow groove and the second deep groove with the oil outlet corresponding cooperation, the first deep groove and the second shallow groove are close to the center of piston body and set, and the first deep groove is linked together with the oil inlet, and the second shallow groove is linked together with the oil outlet, and the first shallow groove and the second deep groove are close to the outer edge of piston body and set, and the second deep groove is linked together with the second shallow groove, and the first shallow groove is linked together with the first deep groove in one end, and the other end of first shallow groove leads to the outside of piston body, the first shallow groove, the first deep groove, oil hole, the second shallow groove and the second deep groove cooperation form the damper oil channel.

[0006] Further, the oil inlet of part of oil holes and the oil outlet of the remaining part of oil holes are alternately arranged on the same end face of the piston body in the circumferential direction.

[0007] Further, the oil holes are arranged in the axial direction of the piston body.

[0008] Further, a bevel for transition is arranged between the first shallow groove and the first deep groove.

[0009] Further, the outer wall of the piston body is provided with a notch corresponding to the first shallow groove, and the first shallow groove leads to the outside of the piston body through the notch.

[0010] Further, a through hole is arranged in the center of the piston body, and the first deep groove and the second shallow groove are arranged close to the through hole.

[0011] Further, the first shallow groove and the first deep groove are arranged in a fan shape in cooperation.

[0012] Further, the second shallow groove and the second deep groove are arranged in a fan shape in cooperation.

[0013] Further, a ring groove is arranged on the outer wall of the piston body.

[0014] Further, the oil inlet is arranged in the first deep groove, and the oil outlet is arranged in the second shallow groove.

[0015] The utility model discloses an improved piston with damping oil channel structure, which is characterized by the following technical scheme: a first shallow groove, a first deep groove, a second shallow groove and a second deep groove are designed on the surface of a piston body, which can ensure that oil can push away a valve piece during low-speed operation, improve the response speed between speed and force value, and avoid deformation of the valve piece caused by rapid impact of the oil during high-speed operation. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structure schematic diagram of the utility model under the first visual angle;

[0017] Figure 2 is Figure 1 is an enlarged structure schematic diagram of A in the figure;

[0018] Figure 3 is Figure 1 is an enlarged structure schematic diagram of B in the figure;

[0019] Figure 4 is a cross section structure schematic diagram of the utility model;

[0020] Figure 5 is Figure 4 is an enlarged structure schematic diagram of C in the figure;

[0021] Figure 6 is Figure 4 is an enlarged structure schematic diagram of D in the figure;

[0022] Figure 7 is a structure schematic diagram of the utility model under the second visual angle.

[0023] Figures 1-7 in the figure: 1, piston body;11, first shallow groove;12, first deep groove;13, second shallow groove;14, second deep groove;15, inclined plane;16, notch;17, through hole;18, ring groove;2, oil hole;21, oil inlet;22, oil outlet. DETAILED DESCRIPTION

[0024] The utility model will be further explained in connection with the drawings.

[0025] As Figures 1-7 shown, a piston with improved damping oil channel structure, including piston body 1, the outer wall of piston body 1 is provided with ring groove 18, the piston body 1 is provided with several oil holes 2, preferably, in the embodiment, referring to Figure 4 , the oil hole 2 is along the axial direction of piston body 1 is set, and the two ends of oil hole 2 are through piston body 1, and one end of oil hole 2 is provided with oil inlet 21, and the other end of oil hole 2 is provided with oil outlet 22, and oil flows into oil hole 2 inside through oil inlet 21, and then flows out through oil outlet 22, and the oil inlet 21 of part of oil hole 2 and the oil outlet 22 of the remaining oil hole 2 are alternately arranged on the same end surface of piston body 1 in the circumferential direction, in the embodiment, referring to Figure 1 , oil hole 2 is provided with six, wherein the oil inlet 21 of three oil holes 2 and the oil outlet 22 of the remaining three oil holes 2 are alternately arranged on the same end surface of piston body 1 in the circumferential direction, which enables the oil to flow bidirectionally inside the piston body 1, and the alternately arranged in the circumferential direction can ensure that the oil can uniformly flow into and out of the piston body 1, and the end surface of the piston body 1 is also provided with the first shallow groove 11 and the first deep groove 12 corresponding to the oil inlet 21, and the second shallow groove 13 and the second deep groove 14 corresponding to the oil outlet 22, and the first deep groove 12 and the second shallow groove 13 are arranged close to the center of the piston body 1, and the first deep groove 12 is communicated with the oil inlet 21, and the second shallow groove 13 is communicated with the oil outlet 22, preferably, in the embodiment, referring to Figure 3 , the oil inlet 21 is arranged in the first deep groove 12, and the oil flows into the oil inlet 21 through the first deep groove 12, referring to Figure 2 , the oil outlet 22 is arranged in the second shallow groove 13, and the oil flows into the second shallow groove 13 first after flowing out, and the first shallow groove 11 and the second deep groove 14 are arranged close to the outer edge of the piston body 1, and the second deep groove 14 is communicated with the second shallow groove 13, and one end of the first shallow groove 11 is communicated with the first deep groove 12, and the other end of the first shallow groove 11 leads to the outside of the piston body 1, preferably, in the embodiment, referring to Figure 7 , the outer wall of the piston body 1 is provided with a notch 16 corresponding to the first shallow groove 11, and the first shallow groove 11 leads to the outside of the piston body 1 through the notch 16, and the oil flows into the first shallow groove 11 through the notch 16, and the first shallow groove 11, the first deep groove 12, the oil hole 2, the second shallow groove 13 and the second deep groove 14 cooperate to form a damping oil channel, and the oil generates damping through the damping oil channel.

[0026] Preferably, the upper and lower ends of the piston body 1 are usually provided with a valve piece in sealing cooperation with the oil outlet 22, and the oil needs to push open the valve piece after flowing out of the oil outlet 22, and the utility model discloses a first shallow groove 11, a first deep groove 12, a second shallow groove 13 and a second deep groove 14 are designed on the surface of the piston body 1, which not only ensures that the oil can push open the valve piece when running at low speed, improves the response speed between the speed and the force value, but also avoids the deformation of the valve piece caused by the rapid impact of the oil when running at high speed, specifically, the oil first flows into the first deep groove 12 through the first shallow groove 11, and then flows into the oil hole 2 through the oil inlet 21, when the oil flows out of the oil outlet 22, it first flows into the second shallow groove 13, and then further flows into the second deep groove 14, the oil in the second deep groove 14 exerts force on the valve piece to push open the valve piece, since the second deep groove 14 is arranged at the position close to the outer edge of the piston body 1, the pushing force required for the oil to push open the valve piece is small, and the valve piece can be pushed more easily, so that the response speed between the speed and the force value can be improved when running at low speed, in order to avoid interference between the oil hole 2 and the annular groove 18, the oil hole 2 can be arranged close to the center of the piston body 1, in addition, when running at high speed, the oil sequentially passes through the first shallow groove 11, the first deep groove 12, the oil hole 2, the second shallow groove 13 and the second deep groove 14, which effectively plays a buffering role, and can avoid the deformation of the valve piece caused by the rapid impact of the oil.

[0027] Preferably, in the embodiment, referring to Figure 3 , the first shallow groove 11 and the first deep groove 12 are further provided with a slope 15 for transition, which facilitates the oil to flow into the first deep groove 12 from the first shallow groove 11 more smoothly.

[0028] Preferably, in the embodiment, referring to Figure 4 , the center of the piston body 1 is provided with a through hole 17, which facilitates the piston rod cooperating with the piston body 1 to pass through, and the oil hole 2, the first deep groove 12 and the second shallow groove 13 are arranged close to the through hole 17.

[0029] Preferably, in the embodiment, referring to Figure 1 , the first shallow groove 11 and the first deep groove 12 are cooperatively arranged in a fan shape, and the second shallow groove 13 and the second deep groove 14 are cooperatively arranged in a fan shape, so that the layout is more beautiful.

[0030] The above only describes the preferred embodiment of the utility model, therefore, equivalent changes or modifications made according to the structure, features and principles described in the utility model patent application range are included in the utility model patent application range.

Claims

1. A piston with improved damping oil gallery structure, comprising a piston body (1), a plurality of oil holes (2) are arranged in the piston body (1), characterized in that: The oil hole (2) penetrates through the piston body (1) at both ends, one end of the oil hole (2) is provided with an oil inlet (21), the other end of the oil hole (2) is provided with an oil outlet (22), the end surface of the piston body (1) is further provided with a first shallow groove (11) and a first deep groove (12) corresponding to the oil inlet (21), a second shallow groove (13) and a second deep groove (14) corresponding to the oil outlet (22), the first deep groove (12) and the second shallow groove (13) are arranged close to the center of the piston body (1), the first deep groove (12) is in communication with the oil inlet (21), the second shallow groove (13) is in communication with the oil outlet (22), the first shallow groove (11) and the second deep groove (14) are arranged close to the outer edge of the piston body (1), the second deep groove (14) is in communication with the second shallow groove (13), one end of the first shallow groove (11) is in communication with the first deep groove (12), the other end of the first shallow groove (11) leads to the outside of the piston body (1), the first shallow groove (11), the first deep groove (12), the oil hole (2), the second shallow groove (13) and the second deep groove (14) cooperate to form a damping oil passage.

2. The piston with improved damper gallery structure according to claim 1, characterized in that: The oil inlet (21) of part of the oil hole (2) and the oil outlet (22) of the remaining part of the oil hole (2) are alternately arranged on the same end surface of the piston body (1) in the circumferential direction.

3. The piston with improved damper gallery structure of claim 1, wherein: The oil hole (2) is arranged in the axial direction of the piston body (1).

4. The piston with improved damper gallery structure of claim 1, wherein: A slope (15) for transition is further arranged between the first shallow groove (11) and the first deep groove (12).

5. The piston with improved damper gallery structure of claim 1 wherein: The outer wall of the piston body (1) is provided with a notch (16) corresponding to the first shallow groove (11), the first shallow groove (11) leads to the outside of the piston body (1) through the notch (16).

6. The piston with improved damper gallery structure of claim 1 wherein: The center of the piston body (1) is provided with a through hole (17), the first deep groove (12) and the second shallow groove (13) are arranged close to the through hole (17).

7. The piston with improved damper gallery structure of claim 1 wherein: The first shallow groove (11) and the first deep groove (12) are arranged in a fan shape in cooperation.

8. The piston with improved damper gallery structure of claim 1 wherein: The second shallow groove (13) and the second deep groove (14) are arranged in a fan shape in cooperation.

9. The piston with improved damper gallery structure of claim 1 wherein: The outer wall of the piston body (1) is provided with an annular groove (18).

10. The piston with improved damper gallery structure of claim 1 wherein: The oil inlet (21) is arranged in the first deep groove (12), and the oil outlet (22) is arranged in the second shallow groove (13).

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