CN217401549U

CN217401549U - Hydraulic damping device with damping force changing along with load

Info

Publication number: CN217401549U
Application number: CN202221175332.XU
Authority: CN
Inventors: 马宇彪
Original assignee: Shanghai Qitian Auto Parts Co ltd
Current assignee: Shanghai Qitian Auto Parts Co ltd
Priority date: 2022-05-17
Filing date: 2022-05-17
Publication date: 2022-09-09
Anticipated expiration: 2032-05-17

Abstract

The utility model relates to a damping force is along with hydraulic damping device of load strain, piston, spring set up the one end that the piston rod is located the cylinder body, the piston is provided with the step hole that link up along the axial, set up the annular on the outer face of cylinder of piston and run through the through-hole in outer face of cylinder and step hole, the cylinder body inner chamber is just cut apart to the cavity sealing washer suit on the annular of piston for two upper and lower cavities, the shaft end portion that the piston rod is located the cylinder body is provided with the toper section, the toper section passes the step hole of piston and sets up with step hole clearance fit. When the load applied to the piston rod is increased, the piston moves towards one end of the spring, the spring is compressed, the clearance fit between the stepped hole of the piston and the conical section of the piston rod is gradually reduced, and the damping force is increased; when the load becomes small, the spring makes the piston reset, the clearance fit between the stepped hole of the piston and the conical section of the piston rod gradually increases, the damping force is reduced, and the damping force is strained along with the load.

Description

Hydraulic damping device with damping force changing along with load

Technical Field

The utility model relates to the field of machinary, especially, relate to a hydraulic damping device who cushions motion.

Background

The existing hydraulic damping device adopts the overflow hole with the fixed size arranged on the piston rod to provide fixed damping force, the size of the aperture of the overflow hole determines the size of the damping force, the damping force cannot be adjusted, and when the load changes, the overflow hole with the corresponding specification needs to be selected for use, so that the use cost is increased.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to provide a hydraulic damping device with a damping force that is dependent on load in order to solve the above-mentioned problems. In order to achieve the above purpose, the utility model provides a following technical scheme:

a hydraulic damping device with damping force strained by load, comprising: the device comprises a cylinder body, a piston rod, a piston, a positioning ring, an opening sealing ring, a cavity sealing ring, a guide sleeve, a spring and liquid; one end of the cylinder body is closed, and the other end of the cylinder body is open; the guide sleeve, the opening sealing ring, the positioning ring, the piston, the cavity sealing ring and the spring are sequentially arranged in the cylinder body; one end of the piston rod extends into the cylinder body, the guide sleeve, the opening sealing ring and the positioning ring are all sleeved on the piston rod, and the piston, the cavity sealing ring and the spring are arranged at the shaft end of the piston rod, which is characterized in that: the piston is provided with the step hole that link up along the axial, set up the annular on the outer face of cylinder of piston and run through the through-hole in outer face of cylinder and step hole, the cavity sealing washer suit in just cut apart on the annular of piston the inner chamber of cylinder body is two upper and lower cavities, the piston rod is located axle head in the cylinder body is provided with the toper section, and the toper section passes the step hole of piston sets up with step hole clearance fit.

Furthermore, a liquid discharge groove communicated with the ring groove is formed in the outer cylindrical surface of the piston, and the liquid discharge groove and the cavity sealing ring form a valve of a liquid passage.

Furthermore, the mouth sealing ring is arranged between the guide sleeve and the positioning ring and is used for sealing liquid in the cylinder body.

Furthermore, the positioning ring is fixedly connected with the cylinder body and used for limiting the stroke of the piston rod.

Further, the holding ring is provided with the recess, the inboard of cylinder body is provided with the arch, the arch with the recess cooperation sets up, and the holding ring is fixed in on the cylinder body through this cooperation.

Furthermore, the upper and lower cavities of the cylinder body are filled with liquid.

One end of the piston rod extending out of the cylinder body is connected with a movement mechanism, when the movement mechanism needs to buffer and decelerate in the movement direction of the piston rod, a cavity sealing ring seals a liquid discharge groove, liquid in one cavity of the cylinder body enters the other cavity from a gap between a through hole of the piston and a step hole of the piston rod, damping force is generated, and the speed of the piston rod is controlled; when the piston rod resets, the liquid discharge groove is opened to the cavity sealing washer, and liquid in the cavity returns through the liquid discharge groove for the piston rod resets fast. The size of the gap between the conical section of the piston rod and the stepped hole of the piston directly influences the damping force of the piston rod.

When the load applied to the piston rod is increased, the piston moves towards one end of the spring under the action of hydraulic pressure, the spring is compressed, the clearance fit between the stepped hole of the piston and the conical section of the piston rod is gradually reduced, and the damping force is increased; when the load becomes smaller, the spring enables the piston to reset, the clearance fit between the stepped hole of the piston and the conical section of the piston rod becomes larger gradually, the damping force is reduced, and the damping force is strained along with the load.

Has the advantages that: the device of the utility model is simple in structure is reliable, through the setting of spring, can adjust the clearance of the piston step hole that produces damping force with piston rod toper section. Will the utility model discloses when being applied to mechanical motion device, can deal with various load changes in a flexible way, save the cost.

Drawings

Fig. 1 is a perspective view of the device of the present invention.

Fig. 2 is a cross-sectional view of the device of the present invention.

Fig. 3 is an enlarged cross-sectional view of the piston portion of the device of the present invention in a state of minimum damping force.

Fig. 4 is an enlarged sectional view of the piston portion of the device of the present invention in the maximum damping force state.

Fig. 5 is an enlarged cross-sectional view of the positioning ring portion of the device of the present invention.

Fig. 6 is a schematic diagram of the piston of the device of the present invention.

Detailed Description

The following description will be made in detail with reference to the accompanying drawings, but the present embodiment is not intended to limit the present invention, and all similar mechanisms and similar variations thereof that adopt the present invention should be included in the scope of the present invention.

A damping force adjustable hydraulic damping device as shown in fig. 1 to 6, comprising: the device comprises a cylinder body (2), a piston rod (1), a piston (7), a positioning ring (4), an opening sealing ring (5), a chamber sealing ring (8), a guide sleeve (3), liquid, a nut (6), a check ring (9) and a spring (10). One end of the cylinder body (2) is closed, and the other end is opened; the guide sleeve (3), the opening sealing ring (5), the positioning ring (4), the piston (7), the chamber sealing ring (8), the spring (10), the nut (6) and the check ring (9) are sequentially arranged in the cylinder body (2); one end of a piston rod (1) stretches into a cylinder body (2), a guide sleeve (3), an opening sealing ring (5) and a positioning ring (4) are all sleeved on the piston rod (1), and a piston (7), a cavity sealing ring (8), a spring (10), a nut (6) and a check ring (9) are arranged at one end of the piston rod (1) which stretches into the interior of the cylinder body (2). As shown in fig. 3, 4 and 6, the piston (7) is provided with a through stepped hole (705) along the axial direction, an outer cylindrical surface (706) of the piston is provided with a ring groove (703) and a through hole (701) which penetrates through the outer cylindrical surface (706) and the stepped hole (705), the upper part of the ring groove (703) is provided with a liquid discharge groove (702) communicated with the ring groove (703), a chamber sealing ring (8) is sleeved on the ring groove (703) of the piston (7) and divides the inner cavity of the cylinder body (2) into an upper chamber (201) and a lower chamber (202), the shaft end of the piston rod (1) which is positioned in the cylinder body (2) is provided with a conical section (102), and the conical section (102) penetrates through the stepped hole (705) of the piston (7) and is in clearance fit with the stepped hole (705).

As shown in fig. 5, the mouth seal ring (5) is provided between the guide sleeve (3) and the positioning ring (4) to seal the liquid in the cylinder (2). The positioning ring (4) is fixedly connected with the cylinder body (2) and used for limiting the stroke shaft end of the piston rod. The positioning ring (4) is provided with a groove (401), the inner side of the cylinder body (2) is provided with a protrusion (501), the protrusion (501) is matched with the groove (401), and the positioning ring (4) is fixed on the cylinder body (2) through the matching.

The upper chamber (201) and the lower chamber (202) of the cylinder body (2) are filled with liquid.

As shown in fig. 3 and 4, a threaded section (101) is arranged at one end of the piston rod (1) extending into the cylinder body (2), the nut (6) is fixed on the threaded section (101) of the piston rod (1), the check ring (9) is arranged below the nut (6) and fixed at the end part of the piston rod (1), a spring (10) is arranged between the nut (6) and the piston (7), one end of the spring (10) supports against the nut (6), and the other end of the spring extends into a counter bore (704) of the piston (7) and supports against the piston (7).

The utility model discloses the device uses when mechanical motion mechanism, and the damping force produces and the mechanism of regulation as follows:

as shown in fig. 3, one end of the piston rod (1) extending out of the outside is connected with a movement mechanism, when the movement mechanism buffers and decelerates in the extending direction of the piston rod (1), the piston rod (1) is drawn to extend out, a chamber sealing ring (8) seals a liquid discharge groove (702), liquid in an upper chamber (201) enters a lower chamber (202) through a through hole (701) and a gap between a conical section (102) of the piston rod (1) and a step hole (705) of a piston (7), damping force is generated, the extending speed of the piston rod (1) is controlled, and the size of the gap between the conical section (102) of the piston rod (1) and the step hole (705) of the piston (7) directly influences the damping force; when the piston rod (1) retracts, the liquid discharge groove (702) is opened by the chamber sealing ring (8), and liquid in the lower chamber (202) enters the upper chamber (201) through the liquid discharge groove (702), so that the piston rod (1) is reset quickly.

As shown in fig. 4, when the load applied to the piston rod (1) becomes large, the piston (7) moves toward one end of the spring (10) under the action of hydraulic pressure, the spring (10) compresses, the clearance fit between the stepped hole (705) of the piston (7) and the tapered section (102) of the piston rod (1) becomes gradually smaller, and the damping force increases. When the load becomes smaller, the spring (10) enables the piston (7) to reset, the clearance fit between the stepped hole (705) of the piston (7) and the conical section (102) of the piston rod (1) becomes larger gradually, the damping force is reduced, and the damping force is strained along with the load.

The device of the utility model is simple in structure reliably, through addding of spring, can adjust the clearance that produces the toper section (102) of piston step hole (705) and piston rod (1) of damping force. Will the utility model discloses when being applied to mechanical motion device, can deal with various load changes in a flexible way, save the cost.

Claims

1. A hydraulic damping device with damping force strain with load comprising: the device comprises a cylinder body, a piston rod, a piston, a positioning ring, an opening sealing ring, a cavity sealing ring, a guide sleeve, a spring and liquid; one end of the cylinder body is closed, and the other end of the cylinder body is open; the guide sleeve, the opening sealing ring, the positioning ring, the piston, the cavity sealing ring and the spring are sequentially arranged in the cylinder body; the one end of piston rod stretches into the cylinder body, uide bushing, oral area sealing washer, holding ring all overlap the piston rod, the piston the cavity sealing washer reaches the spring setting is in the axle head of piston rod, its characterized in that: the piston is provided with the step hole that link up along the axial, be provided with the annular on the outer face of cylinder of piston and run through the through-hole in outer face of cylinder and step hole, the cavity sealing washer suit in just cut apart on the annular of piston cylinder inner chamber is two upper and lower cavities, the piston rod is located axial end portion in the cylinder body is provided with the toper section, and the toper section passes the step hole of piston sets up with step hole clearance fit.

2. A hydraulic damping device with damping force strain with load as claimed in claim 1 wherein: and a liquid discharge groove communicated with the ring groove is formed in the outer cylindrical surface of the piston.

3. A hydraulic damping device with damping force dependent on load strain as claimed in claim 1 wherein: the mouth sealing ring is arranged between the guide sleeve and the positioning ring.

4. A hydraulic damping device with damping force strain with load as claimed in claim 1 wherein: the positioning ring is fixedly connected with the cylinder body.

5. A hydraulic damping device with damping force strain with load as claimed in claim 1 wherein: the locating ring is provided with a groove, the inner side of the cylinder body is provided with a protrusion, and the protrusion is matched with the groove.

6. A hydraulic damping device with damping force strain with load as claimed in claim 1 wherein: the upper and lower cavities of the cylinder body are filled with liquid.