CN211496865U

CN211496865U - Multistage hydraulic lifting device

Info

Publication number: CN211496865U
Application number: CN202020040010.9U
Authority: CN
Inventors: 陈先村
Original assignee: Shanghai Yunli Transmission Technology Co ltd
Current assignee: Shanghai Yunli Transmission Technology Co ltd
Priority date: 2020-01-09
Filing date: 2020-01-09
Publication date: 2020-09-15
Anticipated expiration: 2030-01-09

Abstract

The utility model discloses a multistage hydraulic pressure elevating gear, including the bottom, the outer wall joint of bottom has the cylinder body, one side inner wall that the cylinder body is close to the bottom is equipped with well piston bush, interior piston bush and inner piston rod, on the outer wall of inner piston rod including interior piston bush sliding connection, and the outer wall sliding connection of interior piston bush is on the inner wall of well piston bush, the outer wall sliding connection of well piston bush is on the inner wall of cylinder body, the junction middle part of bottom and cylinder body is equipped with first dust ring. The utility model discloses a multistage simultaneous operation of axle sleeve and body of rod sliding structure, the distribution of different length is realized to the apportionment of the multistage oil pocket internal pressure of sharing between, the body of rod and axle sleeve and guide ring in the different ranks of rethread, reduces the bearing of the less body of rod of diameter, and the movable tip of interior piston sleeve, well piston sleeve and piston rod all is equipped with dust ring, sealing washer and guide ring, guarantees sliding connection department's smoothness and cleanliness factor between the loop bar, and its spacing relation is guaranteed to jump ring and shrouding.

Description

Multistage hydraulic lifting device

Technical Field

The utility model relates to a hydraulic pressure technical field especially relates to a multistage hydraulic pressure elevating gear.

Background

The hydraulic system functions to increase the force by changing the pressure. A complete hydraulic system consists of five parts, namely a power element, an actuator, a control element, an auxiliary element (attachment) and hydraulic oil. Hydraulic systems can be divided into two categories: hydraulic transmission systems and hydraulic control systems. Hydraulic drive systems have as a primary function the transmission of power and motion. Hydraulic control systems are designed to provide a hydraulic system output that meets specific performance requirements (particularly dynamic performance), and are generally referred to as hydraulic drive systems.

Most of the existing hydraulic systems are multi-stage lifting systems, the lifting range is wider, but the existing association and extrusion between each stage or unbalance of a piston rod are caused, and then oil leakage and insufficient support easily occur at the joint of each stage.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a multistage hydraulic lifting device.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a multistage hydraulic pressure elevating gear, includes the bottom, the outer wall joint of bottom has the cylinder body, one side inner wall that the cylinder body is close to the bottom is equipped with well piston sleeve, interior piston sleeve and interior piston rod, interior piston sleeve sliding connection is on the outer wall of interior piston rod, and the outer wall sliding connection of interior piston sleeve is on the inner wall of well piston sleeve, the outer wall sliding connection of well piston sleeve is on the inner wall of cylinder body, the junction middle part of bottom and cylinder body is equipped with first dust ring, and the tip of bottom and the junction of well piston sleeve are equipped with first sealing washer, well piston sleeve, interior piston sleeve and interior piston rod all are equipped with Y type sealing washer, second sealing washer and second guide ring, and the tip of well piston sleeve, interior piston sleeve and interior piston rod all is equipped with O type circle, the end connection of interior piston rod has the cylinder head.

Preferably, the outer wall of the two sides of the cylinder body is provided with a cylinder barrel, the inner wall of the cylinder barrel is provided with an oil pressure balance solenoid valve, the inner wall of the oil pressure balance solenoid valve is connected with an oil pipe, and the end part of the oil pipe is provided with an oil filter plug.

Preferably, a sealing plate is welded to the inner wall of the cylinder head, and a clamp spring is fixed to one side, close to the sealing plate, of the cylinder head.

Preferably, the top inner walls of the middle piston sleeve, the inner piston sleeve and the cylinder body are provided with annular grooves, and the Y-shaped sealing ring, the second sealing ring and the second guide ring are sequentially clamped on the inner wall of the annular groove.

Preferably, an oil discharge hole is formed in the inner wall of the bottom end of the bottom cover, and a screw plug is connected to the inner wall of the oil discharge hole through threads.

Preferably, the inner wall of the bottom cover is provided with an oil pressure sensor, and a signal end of the oil pressure sensor is connected with the oil pressure balance solenoid valve through a signal line.

The utility model has the advantages that:

1. the multistage lifting device has the advantages that through the sliding structure of the shaft sleeve and the rod body, through multistage simultaneous operation, the pressure in the oil cavity is shared among the stages, and distribution of different lengths is realized through the rod bodies, the shaft sleeves and the guide rings in different stages, so that the bearing of the rod body with a smaller diameter is reduced, and the service life of the hydraulic cylinder is prolonged;

2. this multistage elevating gear all is equipped with dust ring, sealing washer and guide ring including the movable tip of piston sleeve, well piston sleeve and piston rod, guarantees the smoothness and the cleanliness factor of sliding connection department between the loop bar, reduces the grit to the damage of the body of rod and jar wall, guarantees its spacing relation each other through jump ring and shrouding between the loop bar.

Drawings

Fig. 1 is a schematic sectional structural view of a multistage hydraulic lifting device provided by the present invention;

fig. 2 is a schematic view of a structure of a shaft head of a multi-stage hydraulic lifting device provided by the present invention;

fig. 3 is the utility model provides a multistage hydraulic lifting device's cylinder body connection structure sketch map.

In the figure: 1 bottom, 2 first dust ring, 3 first sealing washer, 4 first guide ring, 5 inner piston rods, 6 middle piston sleeve, 7 cylinder body, 8 inner piston sleeve, 9 cylinder, 10Y-shaped sealing washer, 11 second sealing washer, 12 second guide ring, 13O-shaped ring, 14 cylinder head, 15 jump ring, 16 shrouding.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

Referring to fig. 1-3, a multi-stage hydraulic lifting device comprises a bottom cover 1, a cylinder body 7 is clamped on the outer wall of the bottom cover 1, a middle piston sleeve 6, an inner piston sleeve 8 and an inner piston rod 5 are arranged on the inner wall of one side, close to the bottom cover 1, of the cylinder body 7, the inner piston sleeve 8 is connected to the outer wall of the inner piston rod 5 in a sliding manner, the outer wall of the inner piston sleeve 8 is connected to the inner wall of the middle piston sleeve 6 in a sliding manner, the outer wall of the middle piston sleeve 6 is connected to the inner wall of the cylinder body 7 in a sliding manner, a first dust ring 2 is arranged in the middle of the joint of the bottom cover 1 and the cylinder body 7, a first sealing ring 3 is arranged at the joint of the end of the bottom cover 1 and the middle piston sleeve 6, a Y-shaped sealing ring 10, a second sealing ring 11 and a second guide ring 12 are arranged at the joints of the middle piston sleeve 6, the inner piston sleeve, end connection of inner piston rod 5 has cylinder head 14, the both sides outer wall of cylinder body 7 all is equipped with cylinder 9, and the inner wall of cylinder 9 is equipped with the balanced solenoid valve of oil pressure, the inner wall connection of the balanced solenoid valve of oil pressure has oil pipe, and oil pipe's tip is equipped with the oil filter stopper, the inner wall welding of cylinder head 14 has shrouding 16, and one side that cylinder head 14 is close to shrouding 16 is fixed with jump ring 15, well piston bush 6, the top inner wall of the inner wall of inner piston bush 8 and cylinder body all is equipped with the ring channel, and Y type sealing washer 10, second sealing washer 11 and second guide ring 12 joint in proper order on the inner wall of ring channel, the bottom inner wall of bottom 1 is equipped with the oil drain hole, and the oil drain hole inner wall has the plug screw through threaded connection, the inner wall of bottom 1 is equipped with.

The working principle is as follows: this multistage elevating gear passes through interior piston bush 8, sliding construction between well piston bush 6 and the interior piston rod 5, through multistage simultaneous operation, through the interior pressure of apportionment oil pocket between multistage, the body of rod and interior piston bush 8 in the different grades of rethread, well piston bush 6, the distribution of different length is realized to the guide ring in the cooperation, reduce the bearing of the less body of rod of diameter, guarantee the life improvement of pneumatic cylinder, wherein interior piston bush 8, the movable tip of well piston bush 6 and piston rod 5 all is equipped with first dust ring 2, first sealing washer 3 and first guide ring 4, guarantee the smoothness and the cleanliness factor of sliding connection department between the loop bar, reduce the grit to the damage of the body of rod and jar wall, guarantee its spacing relation each other through card 15 springs and shrouding 16 between the loop bar.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a multistage hydraulic lifting device, includes bottom (1), its characterized in that, the outer wall joint of bottom (1) has cylinder body (7), one side inner wall that cylinder body (7) are close to bottom (1) is equipped with well piston sleeve (6), interior piston sleeve (8) and inner piston rod (5), interior piston sleeve (8) sliding connection is on the outer wall of inner piston rod (5), and the outer wall sliding connection of interior piston sleeve (8) is on the inner wall of well piston sleeve (6), the outer wall sliding connection of well piston sleeve (6) is on the inner wall of cylinder body (7), the junction middle part of bottom (1) and cylinder body (7) is equipped with first dust ring (2), and the tip of bottom (1) and the junction of well piston sleeve (6) are equipped with first sealing washer (3), the junction of well piston sleeve (6), interior piston sleeve (8) and inner piston rod (5) all is equipped with Y type sealing washer (10), The piston is characterized by comprising a second sealing ring (11) and a second guide ring (12), wherein O-shaped rings (13) are arranged at the end parts of the middle piston sleeve (6), the inner piston sleeve (8) and the inner piston rod (5), and the end part of the inner piston rod (5) is connected with a cylinder head (14).

2. The multistage hydraulic lifting device according to claim 1, wherein the outer walls of the two sides of the cylinder body (7) are provided with cylinder barrels (9), the inner wall of each cylinder barrel (9) is provided with an oil pressure balancing electromagnetic valve, the inner wall of each oil pressure balancing electromagnetic valve is connected with an oil pipe, and the end part of each oil pipe is provided with an oil filter plug.

3. The multistage hydraulic lifting device is characterized in that a sealing plate (16) is welded on the inner wall of the cylinder head (14), and a clamp spring (15) is fixed on one side of the cylinder head (14) close to the sealing plate (16).

4. The multistage hydraulic lifting device as claimed in claim 1, wherein annular grooves are formed in the top inner walls of the middle piston sleeve (6), the inner piston sleeve (8) and the cylinder body, and the Y-shaped sealing ring (10), the second sealing ring (11) and the second guide ring (12) are sequentially clamped on the inner walls of the annular grooves.

5. The multi-stage hydraulic lifting device as claimed in claim 1, wherein the bottom end of the bottom cover (1) is provided with an oil drain hole, and the inner wall of the oil drain hole is connected with a screw plug through a screw thread.

6. The multistage hydraulic lifting device according to claim 1, wherein an oil pressure sensor is provided on the inner wall of the bottom cover (1), and a signal terminal of the oil pressure sensor is connected to an oil pressure balancing solenoid valve through a signal line.