A hydraulic damper

Abstract

The present invention provides a hydraulic damper, which is provided with an oil chamber, a push rod, a front cylinder oil seal, a piston oil seal and a spring. When the push rod is under pressure, it drives the piston oil seal, and the oil seal ring III seals the oil return channel I under pressure, and the hydraulic oil flows from the rear cylinder to the front cylinder through the center hole channel; when the push rod is not under pressure, the spring pushes the piston oil seal to move, and the oil seal ring III approaches the oil return channel II under pressure. The oil return channel II is deeper than the oil return channel I and will not be blocked by the oil seal ring III. The push pin is close to the center hole channel to block the hydraulic oil, and the hydraulic oil can only flow from the front cylinder to the rear cylinder through the oil return channel I and the oil return channel II on both sides; the damper has the advantages of small size and simple structure. Through the difference in the size of the internal piston oil seal center hole channel, the oil return channel I and the oil return channel II, the damping force is realized. The second-level change from the first-level uniform increase to the second-level explosive reaching the maximum value is realized, and the damper reset is smooth and stable.

Description

Technical Field

[0001] The invention relates to a damper, in particular to a hydraulic damper. Background Art

[0002] A damper is a device that provides resistance to movement and dissipates kinetic energy. Current dampers generally have the problems of being large in size and prone to oil leakage, and also have the disadvantages of complex structure, high cost, and low manufacturing efficiency.

[0003] Therefore, in view of the common problems of the above-mentioned existing dampers, such as large size and easy oil leakage, complex structure, high cost, low manufacturing efficiency, etc., it is necessary to further optimize and transform the dampers. Summary of the invention

[0004] The present invention aims to provide a hydraulic damper to solve the common problems of the above-mentioned dampers, such as large size, easy oil leakage, complex structure, high cost, low manufacturing efficiency, etc.

[0005] The technical solution of the present invention is as follows, comprising:

[0006] An oil chamber, a push rod, a front cylinder oil seal, a piston oil seal and a spring; the push rod acts on one end of the piston oil seal through the front cylinder oil seal and interacts with the spring at the other end, so that the piston oil seal performs piston motion in the oil chamber.

[0007] Furthermore, a protruding disc is provided at one end of the ejector rod, and an ejector pin is provided on the other side of the disc. The end of the ejector pin is chamfered. When the ejector rod is pressurized, the piston oil seal is driven to move together, and the hydraulic oil slowly flows into the front cylinder through the chamfered design of the end of the ejector pin.

[0008] Furthermore, an oil seal ring I is provided at the contact point between the inner side of the front cylinder oil seal and the push rod to prevent the hydraulic oil from leaking out from the inner side of the front cylinder oil seal and the push rod, and an oil seal ring II is provided at the outer side and the inner wall of the oil chamber to prevent the hydraulic oil from leaking out from the junction of the front cylinder oil seal and the inner wall of the oil chamber.

[0009] Furthermore, the piston oil seal includes: a center hole channel, an oil return channel I, and an oil return channel II.

[0010] Furthermore, the oil return channel I is arranged on the side of the piston oil seal, close to the inner wall of the oil chamber, and the channel depth is less than or equal to 0.5 mm.

[0011] Furthermore, the oil return channel I has four channels evenly distributed around the side of the piston oil seal. When the push rod is not under pressure, the hydraulic oil can flow from the front cylinder to the rear cylinder through the four channels.

[0012] Furthermore, the oil return channel II is arranged on the side of the piston oil seal, close to the inner wall of the oil chamber, and the channel depth is less than or equal to 2 mm. When the push rod is not under pressure, the spring pushes the piston oil seal to move, and the oil seal ring III will approach the oil return channel II under the pressure of the hydraulic oil. Since the oil return channel II is deeper than the oil return channel I, the hydraulic oil will not be blocked by the oil seal ring III, and the push pin is close to the center hole channel to block the hydraulic oil. The hydraulic oil can only flow from the front cylinder to the rear cylinder through the oil return channel I and oil return channel II on both sides.

[0013] Furthermore, an oil seal ring III is provided between the piston oil seal oil return channel I and the oil return channel II.

[0014] Furthermore, the oil seal ring III can move up and down between the oil return channel I and the oil return channel II. When the push rod is pressurized, it drives the piston oil seal to move together. The oil seal ring III will approach the oil return channel I under the pressure of the hydraulic oil and seal the oil return channel I. The hydraulic oil can only flow from the rear cylinder into the front cylinder through the center hole channel.

[0015] Furthermore, the top cover and the bottom cover of the oil chamber are riveted to the oil chamber respectively, and an oil-proof pad is provided at the riveted joint to prevent the hydraulic oil from leaking out from the riveted joint.

[0016] The advantages of the hydraulic damper described in the present invention are: an oil chamber, a push rod, a front cylinder oil seal, a piston oil seal and a spring; the push rod acts on one end of the piston oil seal through the front cylinder oil seal, and interacts with the spring at the other end, so that the piston oil seal performs piston movement in the oil chamber; a raised disc is provided at one end of the push rod, and a push pin is provided on the other side of the disc, and the end of the push pin is chamfered. When the push rod is compressed, it drives the piston oil seal to move together, and the hydraulic oil slowly flows into the front cylinder through the chamfered end of the push pin; the inner side of the front cylinder oil seal contacts the push rod An oil seal ring I is provided to prevent the hydraulic oil from leaking out from the inside of the front cylinder oil seal and the fitting part of the push rod, and an oil seal ring II is provided on the outside and the inner wall of the oil chamber to prevent the hydraulic oil from leaking out from the junction of the front cylinder oil seal and the inner wall of the oil chamber; the piston oil seal includes: a center hole channel, an oil return channel I, and an oil return channel II; the oil return channel I is arranged on the side of the piston oil seal, close to the inner wall of the oil chamber, and the channel depth is less than or equal to 0.5 mm; the oil return channel I has 4 channels evenly distributed around the side of the piston oil seal, and when the push rod is not under pressure, the hydraulic oil can pass through the 4 channels The channel flows from the front cylinder to the rear cylinder; the return oil channel II is arranged on the side of the piston oil seal, close to the inner wall of the oil chamber, and the channel depth is less than or equal to 2 mm. When the push rod is not under pressure, the spring pushes the piston oil seal to move, and the oil seal ring III will approach the return oil channel II under the pressure of the hydraulic oil. Since the return oil channel II is deeper than the return oil channel I, the hydraulic oil will not be blocked by the oil seal ring III, and the ejector is close to the center hole channel to block the hydraulic oil. The hydraulic oil can only flow from the front cylinder to the rear cylinder through the return oil channel I and the return oil channel II on both sides; an oil seal ring III is arranged between the return oil channel I and the return oil channel II of the piston oil seal; the oil seal ring III can move up and down between the return oil channel I and the return oil channel II, and when the push rod is under pressure, it drives the piston oil seal to move together, and the oil seal ring III will approach the return oil channel I under the pressure of the hydraulic oil and seal the return oil channel I, and the hydraulic oil can only flow from the rear cylinder to the front cylinder through the center hole channel; the top cover and the bottom cover of the oil chamber are riveted to the oil chamber respectively, and an oil-proof pad is arranged at the riveted connection to prevent the hydraulic oil from leaking from the riveted joint.

[0017] The advantages of this damper are its small size and simple structure. Through the difference in the size of the central hole channel of the internal piston oil seal, the oil return channel I and the oil return channel II, a two-level change of the damping force from the first level uniformly increased to the second level explosively reaching the maximum value is achieved, and the damper reset is smooth and stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments; obviously, the drawings described below are some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A hydraulic damper provided by the present invention Figure 1 .

[0020] Figure 2 A hydraulic damper provided by the present invention Figure 2 .

[0021] Figure 3 A hydraulic damper provided by the present invention Figure 3 .

[0022] Figure 4 A hydraulic damper provided by the present invention Figure 4 .

[0023] Figure 5 A hydraulic damper section provided by the present invention Figure 1 .

[0024] Figure 6 A hydraulic damper section provided by the present invention Figure 2 .

[0025] Figure 7 A hydraulic damper section provided by the present invention Figure 3 .

[0026] Reference numerals

[0027] 10 Oil chamber 11 Rear cylinder

[0028] 12 front cylinder 20 oil seal II

[0029] 21 Oil seal ring I 22 Oil seal ring III

[0030] 30 Oil return channel I 31 Oil return channel II

[0031] 32 Center hole channel 40 Ejector rod

[0032] 41 ejector pin 50 front cylinder oil seal

[0033] 51 Piston oil seal 60 Spring DETAILED DESCRIPTION

[0034] The present invention provides a hydraulic damper. To make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0035] The present invention provides a hydraulic damper, combined with Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, including:

[0036] An oil chamber (10), a push rod (40), a front cylinder oil seal (50), a piston oil seal (51) and a spring (60); the push rod (40) acts on one end of the piston oil seal (51) through the front cylinder oil seal (50) and interacts with the spring (60) at the other end, so that the piston oil seal (51) performs piston motion in the oil chamber (10).

[0037] Specifically, the push rod (40) has a protruding disc at one end, and a push pin (41) is provided on the other side of the disc. The end of the push pin (41) is chamfered. When the push rod (40) is pressed, the piston oil seal (51) is driven to move together, and the hydraulic oil slowly flows into the front cylinder (12) through the chamfered end of the push pin (41).

[0038] Specifically, an oil seal ring I (21) is provided at the contact point between the inner side of the front cylinder oil seal (50) and the push rod (40) to prevent the hydraulic oil from leaking out from the contact point between the inner side of the front cylinder oil seal (50) and the push rod (40), and an oil seal ring II (20) is provided at the outer side and the inner wall of the oil chamber (10) to prevent the hydraulic oil from leaking out from the junction between the front cylinder oil seal (50) and the inner wall of the oil chamber (10).

[0039] Specifically, the piston oil seal (51) comprises: a center hole channel (32), an oil return channel I (30), and an oil return channel II (31).

[0040] Specifically, the oil return channel I (30) is arranged on the side of the piston oil seal (51), close to the inner wall of the oil chamber (10), and the channel depth is less than or equal to 0.5 mm.

[0041] Specifically, the oil return channel I (30) has four channels evenly distributed around the side of the piston oil seal (51). When the push rod (40) is not under pressure, the hydraulic oil can flow from the front cylinder (12) into the rear cylinder (11) through the four channels.

[0042] Specifically, the oil return channel II (31) is arranged on the side of the piston oil seal (51) and close to the inner wall of the oil chamber (10). The channel depth is less than or equal to 2 mm. When the push rod (40) is not subjected to pressure, the spring (60) pushes the piston oil seal (51) to move, and the oil seal ring III (22) will approach the oil return channel II (31) under the pressure of the hydraulic oil. Since the oil return channel II (31) is deeper than the oil return channel I (31), the hydraulic oil will not be blocked by the oil seal ring III (22), and the push pin (41) is close to the center hole channel (32) to block the hydraulic oil. The hydraulic oil can only flow from the front cylinder (12) through the oil return channel I (30) and the oil return channel II (31) on both sides into the rear cylinder (11).

[0043] Specifically, an oil seal ring III (22) is provided between the oil return channel I (30) and the oil return channel II (31) of the piston oil seal (51).

[0044] Specifically, the oil seal ring III (22) can move up and down between the oil return channel I and the oil return channel II. When the push rod (40) is pressed and drives the piston oil seal (51) to move together, the oil seal ring III (22) will approach the oil return channel I under the pressure of the hydraulic oil and seal the oil return channel I. The hydraulic oil can only flow from the rear cylinder (11) through the center hole channel (32) into the front cylinder (12).

[0045] Specifically, the top cover and the bottom cover of the oil chamber (10) are riveted to the oil chamber (10) respectively, and an oil-proof pad is provided at the riveted joint to prevent the hydraulic oil from leaking out from the riveted joint.

[0046] In summary, through the oil chamber, push rod, front cylinder oil seal, piston oil seal and spring; the push rod acts on one end of the piston oil seal through the front cylinder oil seal, and interacts with the spring at the other end, so that the piston oil seal performs piston movement in the oil chamber; there is a raised disc at one end of the push rod, and a push pin is provided on the other side of the disc. The end of the push pin is chamfered. When the push rod is pressurized, it drives the piston oil seal to move together, and the hydraulic oil slowly flows into the front cylinder through the chamfered end of the push pin; an oil seal ring I is provided at the contact between the inner side of the front cylinder oil seal and the push rod to prevent liquid The hydraulic oil seeps out from the inside of the front cylinder oil seal and the joint of the push rod. The outside and the inner wall of the oil chamber are provided with an oil seal ring II to prevent the hydraulic oil from seeping out from the intersection of the front cylinder oil seal and the inner wall of the oil chamber. The piston oil seal includes: a center hole channel, an oil return channel I, and an oil return channel II. The oil return channel I is arranged on the side of the piston oil seal, close to the inner wall of the oil chamber, and the channel depth is less than or equal to 0.5 mm. The oil return channel I has 4 channels evenly distributed around the side of the piston oil seal. When the push rod is not under pressure, the hydraulic oil can flow out from the front cylinder through the 4 channels. The oil return channel II into the rear cylinder is arranged on the side of the piston oil seal, close to the inner wall of the oil chamber, and the channel depth is less than or equal to 2 mm. When the push rod is not under pressure, the spring pushes the piston oil seal to move, and the oil seal ring III will approach the oil return channel II under the pressure of the hydraulic oil. Since the oil return channel II is deeper than the oil return channel I, the hydraulic oil will not be blocked by the oil seal ring III, and the ejector is close to the center hole channel to block the hydraulic oil. The hydraulic oil can only flow from the front cylinder to the rear cylinder through the oil return channel I and the oil return channel II on both sides; an oil seal ring III is arranged between the oil return channel I and the oil return channel II of the piston oil seal; the oil seal ring III can move up and down between the oil return channel I and the oil return channel II, and when the push rod is under pressure, it drives the piston oil seal to move together, and the oil seal ring III will approach the oil return channel I under the pressure of the hydraulic oil, and seal the oil return channel I, and the hydraulic oil can only flow from the rear cylinder to the front cylinder through the center hole channel; the top cover and the bottom cover of the oil chamber are riveted to the oil chamber respectively, and an oil-proof pad is arranged at the riveted connection to prevent the hydraulic oil from leaking from the riveted joint.

[0047] The advantages of this damper are its small size and simple structure. Through the difference in the size of the central hole channel of the internal piston oil seal, the oil return channel I and the oil return channel II, a two-level change of the damping force from the first level uniformly increased to the second level explosively reaching the maximum value is achieved, and the damper reset is smooth and stable.

[0048] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A hydraulic damper, characterized in that: include: Oil chamber, ejector rod, front cylinder oil seal, piston oil seal and spring; The push rod acts on one end of the piston oil seal through the front cylinder oil seal and interacts with the spring at the other end, so that the piston oil seal performs piston motion in the oil chamber; The ejector rod has a protruding disc at one end, an ejector pin is provided on the other side of the disc, and the end of the ejector pin is chamfered; An oil seal ring I is provided at the contact point between the inner side of the front cylinder oil seal and the push rod, and an oil seal ring II is provided at the outer side and the inner wall of the oil chamber; The piston oil seal comprises: a center hole channel, an oil return channel I, and an oil return channel II; An oil seal ring III is provided between the piston oil seal oil return channel I and the oil return channel II; The oil seal ring III can move up and down between the oil return channel I and the oil return channel II; The oil return channel I is arranged on the side of the piston oil seal, close to the inner wall of the oil chamber, and the channel depth is less than or equal to 0.5 mm; The oil return channel II is arranged on the side of the piston oil seal, close to the inner wall of the oil chamber, and the channel depth is less than or equal to 2 mm; The oil return channel II is deeper than the oil return channel I, and the hydraulic oil will not be blocked by the oil seal ring III.

2. The hydraulic damper according to claim 1, characterized in that: The oil return channel I has four channels evenly distributed around the side of the piston oil seal.

3. The hydraulic damper according to claim 1, characterized in that: The top cover and the bottom cover of the oil chamber are riveted to the oil chamber respectively, and oil-proof pads are arranged at the riveted joints.

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