CN213075096U

CN213075096U - Hydraulic lifting device

Info

Publication number: CN213075096U
Application number: CN202022165176.6U
Authority: CN
Inventors: 谭正生; 段勋兴; 唐京瑞; 秦圆圆; 陈林; 鄧金凤; 刁传银
Original assignee: Chongqing Chemical Industry Vocational College
Current assignee: Chongqing Chemical Industry Vocational College
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2021-04-30
Anticipated expiration: 2030-09-28

Abstract

The utility model relates to a hydraulic lifting device, which comprises a sleeve and a piston column, wherein the upper section of the sleeve is provided with a first cavity, and the piston column is arranged in the first cavity; a first oil cavity is arranged in the piston column, a liquid inlet and a liquid outlet are arranged at the bottom of the first oil cavity, a second cavity is arranged at the lower section of the sleeve, a first channel and a second channel are arranged at the bottom of the first cavity, a first plunger is arranged in the first channel, and a second plunger is arranged in the second channel; still include first by-pass and second by-pass, be provided with first spring and second spring in the second cavity, under the elasticity of first spring first plunger is in the first passageway and with the one end of first by-pass is plugged up, and the second plunger is in under the elasticity of second spring second passageway lower extreme limit position is provided with first hose between inlet and first passageway, is provided with the second hose between liquid outlet and second passageway, is provided with first check valve on the second by-pass, is provided with second check valve on the liquid outlet.

Description

Hydraulic lifting device

Technical Field

The utility model relates to a seat processing technology field, concretely relates to hydraulic lifting device.

Background

In the existing seat capable of adjusting height, the lifting device is generally of a pneumatic type and a hydraulic type, wherein the pneumatic type lifting device is generally filled with compressed nitrogen, so that the potential safety hazard of explosion exists in use; when a person sits on the seat, the height of the seat is difficult to adjust under the load bearing state of the seat in the conventional hydraulic lifting device. When the height of fluid pressure type seat needs to be adjusted, need the people to get off from the seat, the height of manual regulation seat, then sit to test whether the height of seat is suitable, often need adjust many times repeatedly just can adjust to the height of wanting, adjust more loaded down with trivial details, lead to the seat to use inconveniently.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a hydraulic lifting device.

The utility model discloses a following technical scheme realizes:

a hydraulic lifting device comprises a sleeve and a piston column, wherein a first cavity is arranged at the upper section of the sleeve, the piston column is arranged in the first cavity, and the piston column is matched with the inner wall of the first cavity to form a plunger piston structure capable of sliding relatively;

a first oil cavity is formed in the piston column, a liquid inlet and a liquid outlet are formed in the bottom of the first oil cavity, a second cavity is formed in the lower section of the sleeve, a first channel and a second channel which are communicated with the second cavity are formed in the bottom of the first cavity, a first plunger is arranged in the first channel, and a second plunger is arranged in the second channel;

still include first by-pass and second by-pass, first by-pass respectively with first passageway with first cavity intercommunication, the second by-pass respectively with the second passageway with first cavity intercommunication, be provided with first spring and second spring in the second cavity under the elasticity of first spring first plunger is in the first passageway and with the one end of first by-pass is plugged up the second plunger is in under the elasticity of second spring second passageway lower extreme limit position, the inlet with be provided with first hose between the first passageway, the liquid outlet with be provided with the second hose between the second passageway, be provided with the first check valve that can only flow out on the second by-pass, be provided with the second check valve that can only flow in on the liquid outlet.

Further, the lower end of the first plunger is connected with a first pedal rod, and the lower end of the second plunger is connected with a second pedal rod.

When a person is on the seat, hydraulic oil flows into the first oil cavity in the piston column from the first chamber by stepping on the first pedal rod, so that the seat is adjusted to be low; by stepping on the second pedal lever, hydraulic oil is pumped from the first oil chamber in the piston cylinder into the first chamber, thereby raising the seat.

The piston rod is characterized by further comprising a sleeve cover, the sleeve cover is arranged at the upper end of the sleeve, the piston rod penetrates through a center hole of the sleeve cover, a raised stop block is arranged on the center hole of the sleeve cover, an axial groove which is not communicated is arranged on the outer surface of the piston rod, and the stop block is arranged in the groove in a relatively sliding manner.

Through setting up the sleeve pipe lid, make the dog of sleeve pipe lid in the recess of piston post, when the piston post rose extreme position in the sleeve pipe, the dog can withstand the recess lower part not the portion that link up to prevent this device from rising excessively, the accident that the piston post declutched from the cover intraductal.

Further, the upper end of the piston column is connected with a seat cushion, and the sleeve is connected with a seat base.

Further, the seat base includes backup pad and stand, the upper end of stand with the sleeve pipe welding, the lower extreme of stand with the backup pad welding.

The beneficial effects of the utility model reside in that:

1. the adjustment is very simple and convenient. The height of the seat can be adjusted when a person is on the seat, and the person does not need to leave the seat and then repeatedly adjust the height. When the first pedal lever is stepped on, the first plunger moves downward in the first passage, the first bypass passage communicates with the first passage, hydraulic oil flows from the first chamber into the first oil chamber in the piston post through the first hose, and the piston post descends, thereby lowering the seat. When the second pedal rod is stepped, the second plunger rises to extrude hydraulic oil in the second channel to flow into the first cavity through the second bypass channel and the first one-way valve, the piston column rises to heighten the seat, when the second pedal rod is loosened, the second plunger moves downwards under the action of elastic force, the hydraulic oil in the first oil cavity in the piston column is sucked into the second channel through the second hose, the second pedal rod is stepped repeatedly in the way, the hydraulic oil is continuously pumped into the first cavity from the first oil cavity, and the heightening of the seat is realized.

2. The lifting device is safe and reliable, and because the hydraulic oil is adopted, the explosion accident can not occur, and the safety of the device is improved.

Drawings

Fig. 1 is the structure schematic diagram of the utility model:

FIG. 2 is an enlarged schematic view of FIG. 1 at A;

FIG. 3 is a schematic structural view of the present invention after being mounted on a seat;

fig. 4 is a schematic structural view of a piston column of the present invention;

FIG. 5 is a cross-sectional view B-B of FIG. 4;

fig. 6 is a schematic front view of the casing cover according to the present invention;

fig. 7 is a schematic top view of the casing cover according to the present invention.

Detailed Description

As shown in fig. 1 to 2, a hydraulic lifting device includes a casing 4 and a piston column 2, a first chamber is disposed on an upper section of the casing 4, the piston column 2 is disposed in the first chamber, and the piston column 2 and an inner wall of the first chamber cooperate to form a plunger structure capable of sliding relatively. The first chamber below the piston column 2 is internally provided with hydraulic oil, and the device can realize the descending or ascending of the piston column 2 by reducing or increasing the hydraulic oil in the first chamber below the piston column 2, thereby realizing the purpose of hydraulic lifting.

As shown in fig. 2, a first oil chamber is arranged in the piston column 2, a liquid inlet 22 and a liquid outlet 23 are arranged at the bottom of the first oil chamber, a second chamber is arranged at the lower section of the sleeve 4, a first channel 13 and a second channel 15 communicated with the second chamber are arranged at the bottom of the first chamber, a first plunger 7 is arranged in the first channel 13, and a second plunger 8 is arranged in the second channel 15; the first bypass passage 14 communicates with the first passage 13 and the first chamber, respectively, and the second bypass passage 16 communicates with the second passage 15 and the first chamber, respectively.

As shown in fig. 2, a first spring 18 and a second spring 17 are provided in the second chamber, and the first plunger 7 is located in the first passage 13 under the elastic force of the first spring 18 and blocks one end of the first bypass passage 14, so that the hydraulic oil cannot flow from the first chamber into the first passage 13 through the first bypass passage 14. Under the elastic force of the second spring 17, the second plunger 8 is at the limit position of the lower end of the second channel 15, a first hose 6 is arranged between the liquid inlet 22 and the first channel 13, a second hose 5 is arranged between the liquid outlet 23 and the second channel 15, a first one-way valve 12 which can only flow out is arranged on the second channel 16, and a second one-way valve 11 which can only flow in is arranged on the liquid outlet 23. When the first plunger 7 moves down in the first passage 13, the first bypass passage 14 communicates with the first passage 13, hydraulic oil flows from the first chamber into the first oil chamber in the piston cylinder 2 through the first hose 6, and the piston cylinder 2 descends, thereby lowering the seat. When the second plunger 8 rises, the hydraulic oil in the second channel 15 is extruded to flow into the first chamber through the second bypass channel 16 and the first one-way valve 12, the piston column 2 rises to heighten the seat, the second plunger 8 moves downwards under the action of elastic force, the hydraulic oil in the first oil chamber in the piston column 2 is sucked into the second channel 15 through the second hose 5, and the second pedal rod is repeatedly stepped in such a way, so that the hydraulic oil is continuously pumped into the first chamber from the first oil chamber, and the heightening of the seat is realized.

In order to facilitate the stepping adjustment of the foot, the lower end of the first plunger 7 is connected with a first pedal lever 100, and the lower end of the second plunger 8 is connected with a second pedal lever 200. One end of the first pedal lever 100 is hinged on the support column, the middle part is hinged with the lower end of the first plunger 7, one end of the second pedal lever 200 is hinged with the lower end of the second plunger 8, and the middle part is hinged on the other support column.

As shown in fig. 2 and 4-7, the sleeve cover 3 is disposed at the upper end of the sleeve 4, the piston rod 2 passes through the central hole of the sleeve cover 3, a raised stopper 31 is disposed on the central hole of the sleeve cover 3, an axial non-through groove 21 is disposed on the outer surface of the piston rod 2, and the stopper 31 is slidably disposed in the groove 21. By arranging the sleeve cover 3, the stopper 31 of the sleeve cover 3 is positioned in the groove 21 of the piston post 2, and when the piston post 2 ascends to the limit position in the sleeve 4, the stopper 31 will be pressed against the part which is not penetrated at the lower part of the groove 21, thereby preventing the accident that the device ascends excessively and the piston post 2 is separated from the sleeve 4.

As shown in fig. 3, the upper end of the piston column 2 is connected to the seat cushion 1, the upper end of the column 9 is welded to the sleeve 4, and the lower end of the column 9 is welded to the support plate 10.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. The hydraulic lifting device is characterized by comprising a sleeve (4) and a piston column (2), wherein a first cavity is arranged at the upper section of the sleeve (4), the piston column (2) is arranged in the first cavity, and the piston column (2) is matched with the inner wall of the first cavity to form a plunger structure capable of sliding relatively;

a first oil cavity is formed in the piston column (2), a liquid inlet (22) and a liquid outlet (23) are formed in the bottom of the first oil cavity, a second cavity is formed in the lower section of the sleeve (4), a first channel (13) and a second channel (15) communicated with the second cavity are formed in the bottom of the first cavity, a first plunger (7) is arranged in the first channel (13), and a second plunger (8) is arranged in the second channel (15);

the device is characterized by further comprising a first bypass channel (14) and a second bypass channel (16), wherein the first bypass channel (14) is communicated with the first channel (13) and the first chamber respectively, the second bypass channel (16) is communicated with the second channel (15) and the first chamber respectively, a first spring (18) and a second spring (17) are arranged in the second chamber, the first plunger (7) is located in the first channel (13) under the elastic force of the first spring (18) and blocks one end of the first bypass channel (14), the second plunger (8) is located at the lower end limit position of the second channel (15) under the elastic force of the second spring (17), a first hose (6) is arranged between the liquid inlet (22) and the first channel (13), and a second hose (5) is arranged between the liquid outlet (23) and the second channel (15), the second bypass channel (16) is provided with a first one-way valve (12) which can only flow out of the second bypass channel (16), and the liquid outlet (23) is provided with a second one-way valve (11) which can only flow into the liquid outlet (23).

2. A hydraulic lifting device according to claim 1, characterised in that a first pedal lever (100) is connected to the lower end of the first plunger (7) and a second pedal lever (200) is connected to the lower end of the second plunger (8).

3. A hydraulic lifting device according to claim 2, further comprising a sleeve cover (3), wherein the sleeve cover (3) is arranged at the upper end of the sleeve (4), the piston rod (2) passes through the central hole of the sleeve cover (3), a raised stop (31) is arranged on the central hole of the sleeve cover (3), an axial non-through groove (21) is arranged on the outer surface of the piston rod (2), and the stop (31) is arranged in the groove (21) in a relatively sliding manner.

4. A hydraulic lifting device according to claim 3, characterised in that the upper end of the piston post (2) is connected to the seat cushion (1) and the sleeve (4) is connected to the seat base.

5. A hydraulic lifting device according to claim 4, characterized in that the seat base comprises a support plate (10) and a column (9), the upper end of the column (9) being welded to the bushing (4) and the lower end of the column (9) being welded to the support plate (10).