CN111418999A

CN111418999A - Multistage elevating gear and lift table

Info

Publication number: CN111418999A
Application number: CN202010226308.3A
Authority: CN
Inventors: 秦涛; 刘飞燕
Original assignee: Ningbo Jiacheng Trading Co ltd
Current assignee: Ningbo Jiacheng Trading Co ltd
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2020-07-17

Abstract

The invention relates to the technical field of furniture, and provides a multi-stage lifting device which comprises an upper fixing plate, gas spring switch assemblies, at least three stages of telescopic shells and at least two gas springs. Through using the air spring connecting piece to connect a plurality of air springs end to end, can make the little air spring of a plurality of extension ranges connect and realize the lift control more than tertiary, avoid using the air spring that the extension range is big, reduced the risk of breaking down.

Description

Multistage elevating gear and lift table

Technical Field

The invention relates to the technical field of furniture, in particular to a multi-stage lifting device and a lifting table.

Background

The height-adjustable manual lifting table in the market at present mostly adopts an air spring as a rising power source and adopts a traditional steel wire rope handle for control, so that the height control of the lifting table is two levels at most. To increase the height adjustment range of the lifting table, an air spring with a large extensible range is required to be selected, so that the risk of failure of the air spring is increased, moreover, a switch valve of the air spring is controlled by a steel wire rope handle to be unstable, and the inherent stroke of the steel wire rope can influence the effective stroke of the lifting mechanism.

Disclosure of Invention

The invention aims to solve the technical problem of providing a multi-stage lifting device, which can realize more than three stages of lifting control by adopting a gas spring with a small extension range, increase the height adjustment range of the lifting device and simultaneously not increase the risk of failure.

The invention provides a multi-stage lifting device which comprises an upper fixing plate, gas spring switch assemblies, at least three stages of telescopic shells and at least two gas springs, wherein the top of the uppermost telescopic shell is connected with the lower bottom surface of the upper fixing plate, all the gas springs are arranged inside the telescopic shells, every two gas springs are connected through gas spring connecting pieces, one end of each gas spring connecting piece is sleeved on the top of one gas spring, the other end of each gas spring connecting piece is sleeved on the bottom of the other gas spring, the gas spring switch assemblies are arranged on the lower bottom surfaces of the upper fixing plates, and switch valves at the top ends of all the gas springs are opened by the gas spring switch assemblies.

Compared with the prior art, the multi-stage lifting device has the following advantages: through using the air spring connecting piece to connect a plurality of air springs end to end, can make the little air spring of a plurality of extension ranges connect and realize the lift control more than tertiary, avoid using the air spring that the extension range is big, reduced the risk of breaking down.

Preferably, the multistage lifting device further comprises a lower fixing plate, the bottom of the lowest telescopic shell is connected with the upper bottom surface of the lower fixing plate, a gas spring positioning piece is further fixed on the upper bottom surface of the lower fixing plate, and the bottom of the gas spring at the bottommost end is limited in the gas spring positioning piece. By adopting the structure, all the gas springs can be limited, and the multi-stage lifting device can be prevented from being unstable due to the displacement of the gas springs in the lifting process.

Preferably, the top of the topmost gas spring is also connected with the lower bottom surface of the upper fixing plate. By adopting the structure, the upper fixing plate can not be separated from the top of the topmost gas spring all the time in the lifting process of the multi-stage lifting device.

Preferably, the gas spring switch assembly comprises a pressing component and a switch sheet, the switch sheet corresponds to the switch valves at the top ends of all the gas springs, and the pressing component presses the switch sheet to enable the switch sheet to move downwards. By adopting the structure, the switch plate is uniformly pressed by the pressing component, so that the switch plate directly presses the switch valves of the air springs to control the lifting of all the air springs, the traditional method of controlling the steel wire rope handle is eliminated, the risk of failure is reduced, the invalid stroke of the multistage lifting device is reduced, and the structure is simplified.

Preferably, the gas spring switch assembly further comprises a switch plate guide post for limiting the switch plate, the switch plate guide post is arranged on the lower bottom surface of the upper fixing plate, and the switch plate moves downwards along the switch plate guide post. By adopting the structure, the position of the switch plate can be ensured to be corresponding to the switch valves at the top ends of all the gas springs all the time, and the deviation can not occur.

Preferably, the push-down component comprises a switch handle exposed outside the telescopic shell and a push bar consisting of a transmission bar and a push-down inclined sheet, the switch handle is rigidly connected with one end of the transmission bar, the other end of the transmission bar extends into the telescopic shell at the top and is rigidly connected with the lower end of the push-down inclined sheet, and the high end of the push-down inclined sheet extends to the upper part of the switch sheet. By adopting the structure, the switch handle is pushed inwards to drive the transmission strip and the downward-pressing oblique sheet to move inwards, the contact surface of the downward-pressing oblique sheet and the switch sheet gradually moves downwards to complete the downward-pressing action of the switch sheet, the transmission strip receives the supporting effect of the uppermost telescopic shell, and the structure is simplified.

Preferably, the pressing part further comprises a pushing strip limiting part for limiting the transmission strip, the pushing strip limiting part is arranged on the lower bottom surface of the upper fixing plate, and the transmission strip is limited in the pushing strip limiting part to move back and forth. By adopting the structure, the forward and backward movement directions of the transmission strip can be kept consistent, and the deviation can not occur.

Preferably, the number of the gas springs is two, the number of the gas spring connecting pieces is one, and the telescopic shell consists of three telescopic pipes. By adopting the structure, the most stable three-level lifting device can be realized.

Another technical problem to be solved by the present invention is to provide a lifting table, which can realize more than three levels of lifting control by using a gas spring with a small extension range, so as to increase the height adjustment range of the lifting table without increasing the risk of failure.

The technical scheme of the invention is to provide a lifting table, wherein the multi-stage lifting device is used as table legs, and a table top is arranged on the upper bottom surface of an upper fixing plate.

Compared with the prior art, the lifting table has the following advantages:

the lifting control of more than three levels can be realized by adopting the connection of a plurality of air springs with small extension range, and the air springs with large extension range are avoided; the lifting of all the gas springs is controlled by directly pressing the switch valves of the gas springs, the traditional method of controlling the steel wire rope handle is eliminated, the invalid stroke of the multi-stage lifting device is reduced, and the structure is simplified.

Drawings

Fig. 1 is a schematic structural view of the lifting table of the present invention.

Fig. 2 is a schematic structural view of a lifting switch of the lifting table of the present invention.

Fig. 3 is a sectional view taken along line a-a of fig. 1.

FIG. 4 is a cross-sectional view taken along line A-A of the elevator table of the present invention after the table is retracted to its lowest height

Fig. 5 is a sectional view taken along line B-B of fig. 1.

As shown in the figure: 1. the device comprises a telescopic shell, 1-1 parts, a first telescopic shell, 1-2 parts, a second telescopic shell, 1-3 parts, a third telescopic shell, 1-4 parts, a first air spring, 1-5 parts, a second air spring, 1-6 parts, an air spring connecting piece, 1-7 parts, an air spring positioning piece, 2 parts, an upper fixing plate, 3 parts, a lower fixing plate, 4 parts, an air spring switch component, 4-1 parts, a switch handle, 4-2 parts, a push bar, 4-21 parts, a transmission bar, 4-22 parts, a lower pressing inclined piece, 4-23 parts, a connecting bar limiting piece, 4-3 parts, a switch piece, 4-4 parts and a switch piece guide column.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification.

In the drawings, the thickness, size, and shape of an object have been slightly exaggerated for convenience of explanation. The figures are purely diagrammatic and not drawn to scale.

It will be further understood that the terms "comprises," "comprising," "includes," "including," and/or "including," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Further, when a statement such as "… at least one" appears after the list of listed features, the entire listed feature is modified rather than modifying individual elements in the list.

As shown in fig. 1 to 4, the multi-stage lifting device of the present invention is a table leg of a lifting table, and comprises a telescopic housing 1, wherein the telescopic housing 1 is divided into three sections, which are respectively a first telescopic housing 1-1, a second telescopic housing 1-2, and a third telescopic housing 1-3 from bottom to top, the bottom of the first telescopic housing 1-1 is connected with the upper bottom surface of a lower fixing plate 3, and the top of the third telescopic housing 1-3 is connected with the lower bottom surface of the upper fixing plate 2; the upper bottom surface of the lower fixing plate 3 is also fixed with two gas springs which are respectively a first gas spring 1-4 and a second gas spring 1-5 and are arranged inside a gas spring positioning piece 1-7 telescopic shell 1, the bottom of the first gas spring 1-4 is limited in the gas spring positioning piece 1-7, the first gas spring 1-4 is connected with the second gas spring 1-5 through a gas spring connecting piece 1-6, one end of the gas spring connecting piece 1-6 is sleeved at the top of the first gas spring 1-4, the other end is sleeved at the bottom of the second gas spring 1-5, so that the first gas spring 1-4 and the second gas spring 1-5 have a small segment overlapping area, the second gas springs 1-5 can continue to extend on the basis of the height of the first gas springs 1-4, and the tops of the second gas springs 1-5 are also connected with the lower bottom surface of the upper fixing plate 2; an air spring switch assembly 4 is arranged on the lower bottom surface of the upper fixing plate 2, as shown in fig. 5, the air spring switch assembly 4 comprises a switch handle 4-1, a push bar 4-2, a switch sheet 4-3 and a switch sheet guide post 4-4, the push bar 4-2 comprises a transmission bar 4-21, a lower pressing inclined sheet 4-22 and a push bar limiting member 4-23, the transmission bar 4-21 is limited in the push bar limiting member 4-23, the switch handle 4-1 is rigidly connected with one end of the transmission bar 4-21, the other end of the transmission bar 4-21 is rigidly connected with the lower end of the lower pressing inclined sheet 4-22, the high end of the lower pressing inclined sheet 4-22 extends above the switch sheet 4-3, the switch sheet 4-3 is movably sleeved on the switch sheet guide post 4-4, and switch valves of the first air spring 1-4 and the second air spring 1-5 are both positioned right below the switch sheet 4-3 .

The working principle of descending of the multi-stage lifting device is as follows:

1. the switch handle 4-1 is pushed inwards, the transmission strip 4-21 moves inwards along with the switch handle 4-1 in the strip pushing limiting part 4-23 and pushes the lower pressing inclined sheet 4-22 to move towards the direction of the switch sheet 4-3, the contact surface of the lower pressing inclined sheet 4-22 and the switch sheet 4-3 gradually moves downwards to press the switch sheet 4-3 downwards, and the switch sheet 4-3 moves downwards along the switch sheet guide column 4-4;

2. when the switch plate 4-3 is pressed on the second gas spring 1-5 and the switch valve of the second gas spring 1-5 is opened, the upper fixing plate 2 is pressed and pressed downwards to enable the height of the second gas spring 1-5 to be reduced, and meanwhile, the third telescopic shell 1-3 descends and retracts into the second telescopic shell 1-2;

3. continuously keeping the position of the switch handle 4-1 and pressing the upper fixing plate 2 downwards, when the switch plate 4-3 is pressed on the first air spring 1-4 and the switch valve of the first air spring 1-4 is opened, the third telescopic shell 1-3 is completely retracted into the second telescopic shell 1-2, the first air spring 1-4 starts to reduce the height, and the second air spring 1-5 is driven to descend together under the action of the air spring connecting piece 1-6, and simultaneously the second telescopic shell 1-2 descends and retracts into the first telescopic shell 1-1;

at any time in the descending process of the second gas spring 1-5 or the first gas spring 1-4, as long as the switch handle 4-1 is pulled outwards, the transmission strip 4-21 moves outwards along with the switch handle 4-1 in the strip pushing limiting part 4-23 and pulls the lower pressing inclined sheet 4-22 to gradually move outwards, the lower pressing inclined sheet 4-22 does not apply a pressing action force to the switch sheet 4-3 any more, the switch sheet 4-3 does not apply an action force to the switch valve of the gas spring any more, the switch valve of the gas spring is closed, the gas spring stops descending and is kept stable, and the upper fixing plate 2 stops at any position within the range of the stroke height of the multistage lifting device. Of course, the upper fixing plate 2 and the switch handle 4-1 may be just loosened, the pressure on the switch valve of the air spring is removed, the switch valve of the air spring moves upward until the switch valve returns to the closed state, at this time, the switch plate 4-3 moves upward due to the action of the air spring and is reset, so that the contact surface of the switch plate 4-3 and the lower pressing inclined plate 4-22 gradually moves upward and pushes the lower pressing inclined plate 4-22 to move outward, and the lower pressing inclined plate 4-22 causes the transmission bar 4-21 to move outward together with the switch handle 4-1 in the bar pushing limiting member 4-23 until the switch handle 4-1 returns to the original position.

The working principle of the lifting of the multi-stage lifting device is as follows:

2. when the switch plate 4-3 is pressed on the gas spring and the switch valve of the gas spring is opened, the first gas spring 1-4 rises, and simultaneously drives the second gas spring 1-5 to rise together under the action of the gas spring connecting piece 1-6, the upper fixing plate 2 rises along with the second gas spring 1-5, and simultaneously drives the second telescopic shell 1-2 to rise and gradually extend out of the first telescopic shell 1-1;

3. continuously keeping the position of the switch handle 4-1, when the switch piece 4-3 leaves the top end of the first air spring 1-4, the switch valve of the first air spring 1-4 is closed, the first air spring 1-4 is kept at the highest height, the switch valve of the second air spring 1-5 is still in an open state, the second air spring 1-5 drives the upper fixing plate 2 to continuously rise, and meanwhile, the third telescopic shell 1-3 rises and gradually extends out of the second telescopic shell 1-2;

at any time in the ascending process of the second gas spring 1-5 or the first gas spring 1-4, as long as the switch handle 4-1 is pulled outwards, the transmission strip 4-21 moves outwards along with the switch handle 4-1 in the strip pushing limiting part 4-23 and pulls the lower pressing inclined sheet 4-22 to gradually move outwards, the lower pressing inclined sheet 4-22 does not apply a downward pressing acting force to the switch sheet 4-3 any more, the switch sheet 4-3 does not apply an acting force to the switch valve of the gas spring any more, the switch valve of the gas spring is closed, the gas spring stops ascending and is kept stable, and the upper fixing plate 2 stops at any position within the range of the stroke height of the multistage lifting device. Of course, the pressure on the switch valve of the air spring is removed only by loosening the switch handle 4-1, the switch valve of the air spring moves upwards until the switch valve returns to the closed state, at the moment, the switch plate 4-3 moves upwards due to the action of the air spring, so that the contact surface of the switch plate 4-3 and the lower pressing inclined plate 4-22 gradually moves upwards and pushes the lower pressing inclined plate 4-22 to move outwards, and the lower pressing inclined plate 4-22 can make the transmission bar 4-21 move outwards together with the switch handle 4-1 in the bar pushing limiting part 4-23 until the switch handle 4-1 returns to the original position.

If a third gas spring is added, only one more gas spring connecting piece 1-6 is added to be connected with the top of the second gas spring 1-5 and the bottom of the third gas spring, and the area of a switch plate 4-3 of the gas spring is increased, so that the switch plate 4-3 can ensure that all switch valves of the gas springs are covered. The addition of multiple gas springs also operates such that multiple gas springs are connected in series one after the other.

The multi-stage lifting device is applied to the table legs of the lifting table, and the table top with proper size is arranged on the upper fixing plate 2, so that the lifting table is formed. Of course, the multi-stage lifting device can also be applied to other furniture needing lifting height adjustment, such as chairs, stools, supporting triangular frames, telescopic clothes hangers and the like. The above are merely preferred embodiments of the present invention, and are not intended to limit the scope of the invention; it is intended that the following claims be interpreted as including all such alterations, modifications, and equivalents as fall within the true spirit and scope of the invention.

Claims

1. The utility model provides a multistage elevating gear, its characterized in that, including an upper fixed plate (2), air spring switch module (4), at least tertiary flexible shell, two piece at least air springs, the lower bottom surface of an upper fixed plate (2) is connected at the top of the flexible shell of top, all air springs all set up the inside at flexible shell, the air spring is connected through air spring connecting piece (1-6) between two liang, the pot head of air spring connecting piece (1-6) is established at the top of an air spring and another pot head is established at the bottom of another air spring, air spring switch module (4) are installed in the lower bottom surface of an upper fixed plate (2), the switch valve on all air spring tops all is opened by air spring switch module (4).

2. The multi-stage lifting device according to claim 1, further comprising a lower fixing plate (3), wherein the bottom of the lowest telescopic housing is connected to the upper bottom surface of the lower fixing plate (3), a gas spring positioning member (1-7) is further fixed on the upper bottom surface of the lower fixing plate (3), and the bottom of the lowest gas spring is limited in the gas spring positioning member (1-7).

3. The multi-stage lifting device according to claim 1, wherein the top of the topmost gas spring is also connected to the lower bottom surface of the upper fixing plate (2).

4. The multi-stage lifting device according to claim 1, wherein the gas spring switch assembly (4) comprises a pressing member and a switch plate (4-3), the switch plate (4-3) corresponds to the switch valve at the top end of all the gas springs, and the pressing member presses the switch plate (4-3) to move the switch plate (4-3) downwards.

5. The multi-stage lifting device according to claim 4, wherein the gas spring switch assembly (4) further comprises a switch plate guide post (4-4) for limiting the switch plate (4-3), the switch plate guide post (4-4) is provided on the lower bottom surface of the upper fixing plate (2), and the switch plate (4-3) moves up and down along the switch plate guide post (4-4).

6. The multi-stage lifting device according to claim 4, wherein the pressing member comprises a switch handle (4-1) exposed outside the telescopic housing and a push bar (4-2) consisting of a driving bar (4-21) and a pressing ramp (4-22), the switch handle (4-1) is rigidly connected to one end of the driving bar (4-21), the other end of the driving bar (4-21) extends into the telescopic housing at the top and is rigidly connected to the lower end of the pressing ramp (4-22), and the upper end of the pressing ramp (4-22) extends above the switch bar (4-3).

7. The multi-stage lifting device according to claim 6, wherein the pressing member further comprises a push bar limiting member (4-23) for limiting the position of the transmission bar (4-21), the push bar limiting member (4-23) is disposed on the lower bottom surface of the upper fixing plate (2), and the transmission bar (4-21) is limited in the push bar limiting member (4-23) to move back and forth.

8. The multi-stage lifting device according to claim 1, wherein the number of gas springs is two, the number of gas spring connecting members (1-6) is one, and the telescopic housing is composed of three telescopic tubes.

9. A lifting table, characterized in that the multi-stage lifting device as claimed in any of claims 1 to 9 is used as a table leg, and a table top is mounted on the upper bottom surface of the upper fixing plate (2).