CN220540186U

CN220540186U - Hydraulic cylinder and hydraulic damper

Info

Publication number: CN220540186U
Application number: CN202322053026.XU
Authority: CN
Inventors: 韩璧丞; 李晓; 汪文广
Original assignee: Zhejiang Qiangnao Technology Co ltd
Current assignee: Zhejiang Qiangnao Technology Co ltd
Priority date: 2023-08-01
Filing date: 2023-08-01
Publication date: 2024-02-27
Anticipated expiration: 2033-08-01

Abstract

The utility model discloses a hydraulic cylinder and a hydraulic damper, wherein the hydraulic cylinder comprises: a cylinder and a piston; the piston is positioned in the cylinder body; the cylinder body comprises a cover plate, and a pressing part is arranged on the inner side of the cover plate; the end face, facing the cover plate, of the piston is provided with a groove body, and an elastic structure is arranged in the groove body; when the pressing part is inserted into the groove body, the pressing part abuts against the elastic structure. When the piston moves upwards, the pressing part can be inserted into the groove body. Because the elastic structure is arranged in the groove body, the pressing part is inserted into the groove body and is abutted against the elastic structure, so that the elastic structure is deformed, the piston is prevented from moving upwards, and the piston is prevented from colliding with the cover plate.

Description

Hydraulic cylinder and hydraulic damper

Technical Field

The utility model relates to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder and a hydraulic damper.

Background

The hydraulic damper comprises a hydraulic cylinder, wherein the hydraulic cylinder comprises a piston, and the piston moves up and down in the hydraulic cylinder. In the prior art, the piston may touch the upper end or the lower end of the hydraulic cylinder in the up-and-down movement process, and the piston is easy to damage.

Accordingly, the prior art is still in need of improvement and development.

Disclosure of Invention

The utility model aims to solve the technical problems that the upper end or the lower end of a hydraulic cylinder is likely to be touched in the up-down movement process of the piston in the prior art, and the piston is easy to damage.

The technical scheme adopted for solving the technical problems is as follows:

a hydraulic cylinder, comprising: a cylinder and a piston; the piston is positioned in the cylinder body; the cylinder body comprises a cover plate, and a pressing part is arranged on the inner side of the cover plate;

the end face, facing the cover plate, of the piston is provided with a groove body, and an elastic structure is arranged in the groove body;

when the pressing part is inserted into the groove body, the pressing part abuts against the elastic structure.

The hydraulic cylinder, wherein, the hydraulic cylinder still includes: a connecting rod;

the bottom of the groove body is connected with the connecting rod.

The hydraulic cylinder is characterized in that the elastic structure is sleeved outside the connecting rod;

the cover plate is provided with a through hole, the connecting rod extends from the through hole to the outside of the cylinder body, and the pressing part is arranged around the through hole.

The hydraulic cylinder, wherein, the elastic structure includes:

the elastic piece is positioned in the groove body;

and the annular piece is positioned between the elastic piece and the pressing part.

The hydraulic cylinder comprises an elastic piece, wherein the elastic piece comprises a first spring or a disc spring; and/or

Be provided with ring channel and first overflow mouth on the lateral wall of cell body, elastic construction still includes:

the C-shaped piece is positioned in the annular groove and limits the annular piece;

wherein the fracture of the C-shaped piece is positioned at a position corresponding to the first overflow outlet.

The hydraulic cylinder is characterized in that a second overflow outlet is arranged on the pressing part, and the second overflow outlet is positioned at a position corresponding to the first overflow outlet.

The hydraulic cylinder is characterized in that a first through hole is formed in the cover plate, a first valve body is arranged on the pressing part, and the first valve body is used for opening or closing the first through hole; and/or

The cylinder body further comprises a bottom plate, a second through hole is formed in the bottom plate, a second valve body is arranged in the second through hole, and the second valve body is used for opening or closing the second through hole.

The hydraulic cylinder, wherein the first valve body includes:

the first blocking piece is abutted against the first through hole;

the two ends of the second spring are respectively connected with the pressing part and the first blocking piece;

when the pressing part is inserted into the groove body, the edge of the groove body abuts against the second spring.

The hydraulic cylinder, wherein the end surface of the piston facing the bottom plate is provided with a sinking groove; the second valve body includes:

the second blocking piece is abutted against the second through hole;

the column part is arranged on the second plugging piece and penetrates through the second through hole;

the two ends of the third spring are respectively connected with the bottom plate and the column part;

wherein, the sinking groove keeps away the position to the second shutoff piece.

A hydraulic damper comprising a hydraulic cylinder as claimed in any one of the preceding claims.

The beneficial effects are that: when the piston moves upwards, the pressing part can be inserted into the groove body. Because the elastic structure is arranged in the groove body, the pressing part is inserted into the groove body and is abutted against the elastic structure, so that the elastic structure is deformed, the piston is prevented from moving upwards, and the piston is prevented from colliding with the cover plate.

Drawings

Fig. 1 is a first cross-sectional view of a hydraulic cylinder in an embodiment of the utility model.

Fig. 2 is a second cross-sectional view of a hydraulic cylinder in an embodiment of the utility model.

Fig. 3 is a third cross-sectional view of a hydraulic cylinder in an embodiment of the utility model.

Fig. 4 is a schematic diagram of the structure of the cylinder and the accumulator in the embodiment of the present utility model.

Fig. 5 is a cross-sectional view of a cylinder and accumulator in an embodiment of the utility model.

FIG. 6 is a cross-sectional view of a piston, connecting rod, and cover plate in an embodiment of the utility model.

FIG. 7 is a schematic diagram of a piston, connecting rod and cover plate according to an embodiment of the utility model.

Fig. 8 is a schematic view of a piston and a connecting rod according to an embodiment of the present utility model.

Fig. 9 is a schematic view of a hydraulic damper in an embodiment of the present utility model.

Fig. 10 is a schematic diagram of a hydraulic damper in an embodiment of the utility model.

Reference numerals illustrate:

10. a cylinder; 11. a cover plate; 12. a pressing part; 121. a second overflow port; 13. a via hole; 14. a first through hole; 15. a bottom plate; 16. a second through hole; 20. a piston; 21. a tank body; 22. an elastic structure; 221. an elastic member; 222. a ring member; 223. a C-shaped member; 23. an annular groove; 24. a first overflow port; 25. sinking grooves; 30. a connecting rod; 40. a first valve body; 41. a first blocking member; 42. a second spring; 50. a second valve body; 51. a second blocking member; 52. a column; 53. a third spring; 60. an energy storage; 70. a first throttle valve; 80. and a second throttle valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more clear and clear, the present utility model will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Referring to fig. 1-10, the present utility model provides preferred embodiments of a hydraulic cylinder.

As shown in fig. 1 and 2, the hydraulic cylinder includes: a cylinder 10 and a piston 20; the piston 20 is positioned in the cylinder 10; the cylinder 10 includes a cover plate 11, and a pressing part 12 is provided on the inner side of the cover plate 11;

the end face of the piston 20, which faces the cover plate 11, is provided with a groove body 21, and an elastic structure 22 is arranged in the groove body 21;

wherein, when the pressing part 12 is inserted into the groove 21, the pressing part 12 is abutted against the elastic structure 22.

Specifically, a cavity for loading hydraulic oil is formed in the cylinder 10, a piston 20 is disposed in the cylinder 10 (or the cavity), the piston 20 can move up and down in the cylinder 10 (or the cavity), the piston 20 divides the cylinder 10 (or the cavity) into an upper half and a lower half, the piston 20 is sealed with the inner wall of the cylinder 10, and hydraulic oil on the upper side and the lower side of the piston 20 cannot flow through the piston 20.

It should be noted that, the pressing portion 12 is disposed on the inner side of the cover 11, the groove 21 is disposed on the side of the piston 20 facing the cover 11, and the size of the pressing portion 12 is smaller than the size of the groove 21. When the piston 20 moves upward, the pressing portion 12 can be inserted into the groove 21. Since the elastic structure 22 is arranged in the groove body 21, the pressing part 12 is inserted into the groove body 21 and abuts against the elastic structure 22, so that the elastic structure 22 is deformed to prevent the piston 20 from moving upwards, and the piston 20 is prevented from colliding with the cover plate 11.

In a preferred embodiment of the present utility model, referring to fig. 1-2 and fig. 4, the hydraulic cylinder further includes: a connecting rod 30;

the bottom of the groove 21 is connected with the connecting rod 30.

Specifically, one end of the connecting rod 30 is connected to the bottom of the tank 21, and when the connecting rod 30 moves, the piston 20 is driven to move. The resilient structure 22 is disposed about the link 30.

In a preferred embodiment of the present utility model, referring to fig. 2, 5 and 6, the elastic structure 22 is sleeved outside the connecting rod 30;

the cover plate 11 is provided with a through hole 13, the connecting rod 30 extends from the through hole 13 to the outside of the cylinder 10, and the pressing part 12 is arranged around the through hole 13.

Specifically, the cover plate 11 is provided with the through hole 13, the connecting rod 30 is positioned in the through hole 13, the connecting rod 30 is sealed with the through hole 13, and hydraulic oil in the cylinder body 10 cannot flow out of the through hole 13. One end of the connecting rod 30 is connected with the piston 20, and the other end is located outside the cylinder 10. The pressing portion 12 is also provided around the link 30.

In a preferred embodiment of the present utility model, referring to fig. 2, 5 and 6, the elastic structure 22 includes:

an elastic member 221 located in the groove 21;

an annular member 222 is located between the elastic member 221 and the pressing portion 12.

Specifically, the elastic member 221 provides elastic force, and the annular member 222 has a plate-like structure, so that the elastic member 221 is uniformly stressed, and deformation amounts of all parts are consistent. When the piston 20 moves upward, the pressing portion 12 contacts the ring member 222 and presses the elastic member 221, and the elastic member 221 is deformed by force.

In a preferred embodiment of the present utility model, referring to fig. 5-6, the elastic member 221 includes a first spring or a disc spring.

Specifically, the elastic member 221 may be a spring or a disc spring, and one or more disc springs may be used, and a plurality of disc springs may form surface-to-surface contact or edge contact.

In a preferred embodiment of the present utility model, referring to fig. 6 to 8, the side wall of the tank body 21 is provided with an annular groove 23 and a first overflow port 24, and the elastic structure 22 further includes:

a C-shaped member 223 positioned in the annular groove 23 and limiting the annular member 222;

wherein the fracture of the C-shaped member 223 is located at a position corresponding to the first overflow port 24.

Specifically, an annular groove 23 is formed in the side wall of the groove body 21, an opening of the annular groove 23 faces the center of the groove body 21, the annular groove 23 is used for placing a C-shaped piece 223, and the C-shaped piece 223 limits the annular piece 222, so that the annular piece 222 cannot pop out of the groove body 21, and the elastic piece 221 and the annular piece 222 are always located in the groove body 21. The C-shaped member 223 is deformed by pressure, so that the fracture becomes small, and thus can be taken out from the annular groove 23, and the annular member 222 and the elastic member 221 can be taken out from the groove body 21. Since the hydraulic oil exists in the tank body 21, when the pressing portion 12 is inserted into the tank body 21 and presses the ring member 222, the hydraulic oil in the tank body 21 overflows, specifically, smoothly flows out through the break of the C-shaped member 223 and the first overflow port 24 of the tank body 21.

In a preferred embodiment of the present utility model, referring to fig. 6-8, the pressing portion 12 is provided with a second overflow outlet 121, and the second overflow outlet 121 is located at a position corresponding to the first overflow outlet 24.

Specifically, in order to further facilitate the outflow of the hydraulic oil in the tank 21, the pressing portion 12 is provided with at least two second overflow outlets 121, and the two second overflow outlets 121 are respectively directed toward the connecting rod 30 and the first overflow outlet 24, so that the hydraulic oil near the connecting rod 30 can flow to the first overflow outlet 24 through the second overflow outlets 121 and the fracture.

In a preferred embodiment of the present utility model, referring to fig. 1-2 and fig. 5-6, the cover 11 is provided with a first through hole 14, the pressing portion 12 is provided with a first valve body 40, and the first valve body 40 is used for opening or closing the first through hole 14.

Specifically, the flow direction of the first valve body 40 is the direction of the first through hole 14 toward the cavity, the first through hole 14 is provided on the cover plate 11, the first valve body 40 is located at the inner side of the first through hole 14 (i.e., toward one side of the cavity), the first through hole 14 is used to communicate with the lower half of the cylinder 10, and the hydraulic oil of the lower half of the cylinder 10 can flow to the first through hole 14 and flow into the upper half of the cylinder 10 through the first valve body 40 (when the first valve body 40 is opened). While the hydraulic oil in the upper half of the cylinder 10 cannot flow from the first valve body 40 (at this time, the first valve body 40 is closed) into the first through hole 14.

In a preferred embodiment of the present utility model, referring to fig. 1 and 3, the cylinder 10 further includes a bottom plate 15, the bottom plate 15 is provided with a second through hole 16, and a second valve body 50 is disposed in the second through hole 16, and the second valve body 50 is used for opening or closing the second through hole 16.

Specifically, the flow direction of the second valve body 50 is the direction in which the second through hole 16 faces the cavity. The bottom plate 15 is provided with a second through hole 16, and the second valve body 50 is located inside the second through hole 16 (i.e., toward one side of the cavity), the second through hole 16 is used for communicating with the upper half of the cylinder 10, and the hydraulic oil of the upper half of the cylinder 10 can flow to the second through hole 16 and flow into the lower half of the cylinder 10 through the second valve body 50 (when the second valve body 50 is opened). While the hydraulic oil in the lower half of the cylinder 10 cannot flow from the second valve body 50 (at this time, the second valve body 50 is closed) into the second through hole 16.

In a preferred embodiment of the present utility model, referring to fig. 1-2 and fig. 5-6, the first valve body 40 includes:

a first blocking piece 41, which abuts against the first through hole 14;

a second spring 42 having both ends connected to the pressing portion 12 and the first blocking member 41, respectively;

wherein, when the pressing part 12 is inserted into the groove 21, the edge of the groove 21 abuts against the second spring 42.

Specifically, the first valve body 40 is disposed on the pressing portion 12 and closes the inner side of the first through hole 14, so that the hydraulic oil in the first through hole 14 can flow from the first valve body 40 to the upper half of the cavity, while the hydraulic oil in the upper half of the cavity cannot flow from the first valve body 40 to the first through hole 14. The first blocking member 41 closes the first through hole 14, and the second spring 42 provides an upward moving elastic force such that the first blocking member 41 moves upward against the cover plate 11 and closes the first through hole 14.

The first through holes 14 may be plural, and the plural first through holes 14 are provided around the hole 13 and are located outside the pressing portion 12. Both ends of each first through hole 14 are respectively communicated with the cavity and the accumulator 60. The first blocking member 41 is annular and closes all the first through holes 14. The second spring 42 may be tapered, a small end of the tapered second spring 42 being connected to the pressing portion 12, and a large end of the tapered second spring 42 being connected to the first blocking member 41. When the piston 20 moves upwards, the edge of the groove body 21 abuts against the second spring 42, so that the second spring 42 is compressed, the upward elastic force of the second spring 42 is further increased, and the sealing effect of the first sealing piece 41 on the first through hole 14 is enhanced. Of course, the downward elastic force of the second spring 42 is also utilized to block the upward movement of the piston 20 together with the elastic structure 22, further preventing the piston 20 from colliding with the cover plate 11.

In a preferred embodiment of the present utility model, referring to fig. 1 and 3, the end surface of the piston 20 facing the bottom plate 15 is provided with a sink 25; the second valve body 50 includes:

a second blocking member 51 abutting against the second through hole 16;

a pillar 52 disposed on the second blocking member 51 and passing through the second through hole 16;

a third spring 53 having both ends connected to the bottom plate 15 and the column 52, respectively;

wherein the sinking groove 25 keeps away the second blocking member 51.

Specifically, the side of the piston 20 facing the bottom plate 15 is provided with a sinking groove 25, and the sinking groove 25 keeps away from the second blocking member 51, so that when the piston 20 moves downward, the second blocking member 51 may be located in the sinking groove 25, and the piston 20 does not touch the second blocking member 51.

The second blocking member 51 is spherical in shape, and the edge of the second through hole 16 is chamfered to fit the curved surface of the spherical second blocking member 51. The second blocking member 51 has a weight larger than that of the first blocking member 41, and the second blocking member 51 moves downward by gravity, thereby blocking the second through hole 16.

The second blocking piece 51 is positioned in the cylinder body 10, the third spring 53 is positioned outside the cylinder body 10, when the second blocking piece 51 moves upwards, the second through hole 16 is opened, the third spring 53 is compressed and deformed, and the second valve body 50 is opened; when the third spring 53 resumes the deformation, the second blocking member 51 moves downward, and the second through hole 16 is closed by the second blocking member 51, and the second valve body 50 is closed. The third spring 53 may be tapered, with a small end of the tapered third spring 53 connected to the post 52 and a large end of the tapered third spring 53 abutting against the edge of the second through hole 16.

The utility model also provides a hydraulic damper comprising the hydraulic cylinder in any embodiment, and the hydraulic damper is particularly described above.

As shown in fig. 2, 3, 9 and 10, the hydraulic damper provided by the utility model has all the above advantages due to the hydraulic cylinder in any one of the above technical schemes, and is not described herein again.

The hydraulic damper further includes: the two ends of the first through hole 14 are respectively communicated with the upper half parts of the accumulator 60 and the cylinder body 10, the two ends of the second through hole 16 are respectively communicated with the lower half parts of the accumulator 60 and the cylinder body 10, the two ends of the first throttle valve 70 are respectively communicated with the upper half parts of the accumulator 60 and the cylinder body 10, and the two ends of the second throttle valve 80 are respectively communicated with the lower half parts of the accumulator 60 and the cylinder body 10.

It is to be understood that the utility model is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims.

Claims

1. A hydraulic cylinder, comprising: a cylinder and a piston; the piston is positioned in the cylinder body; the cylinder body is characterized by comprising a cover plate, wherein a pressing part is arranged on the inner side of the cover plate;

2. The hydraulic cylinder of claim 1, further comprising: a connecting rod;

the bottom of the groove body is connected with the connecting rod.

3. The hydraulic cylinder according to claim 2, wherein the elastic structure is sleeved outside the connecting rod;

4. A hydraulic cylinder according to any one of claims 1-3, characterized in that the elastic structure comprises:

the elastic piece is positioned in the groove body;

5. The hydraulic cylinder of claim 4, wherein the elastic member comprises a first spring or a disc spring; and/or

6. The hydraulic cylinder according to claim 5, wherein a second overflow port is provided on the pressing portion, the second overflow port being located at a position corresponding to the first overflow port.

7. The hydraulic cylinder according to claim 1, wherein a first through hole is provided on the cover plate, and a first valve body for opening or closing the first through hole is provided on the pressing portion; and/or

8. The hydraulic cylinder of claim 7, wherein the first valve body comprises:

the first blocking piece is abutted against the first through hole;

9. The hydraulic cylinder according to claim 7, wherein an end surface of the piston facing the bottom plate is provided with a sink; the second valve body includes:

the second blocking piece is abutted against the second through hole;

10. A hydraulic damper, characterized in that it comprises a hydraulic cylinder as claimed in any one of claims 1 to 9.