CN214989952U

CN214989952U - Piston rod end controlled multi-stage lifting oil cylinder

Info

Publication number: CN214989952U
Application number: CN202121317078.8U
Authority: CN
Inventors: 周元聪
Original assignee: Jinan Fu Chi Technology Co ltd
Current assignee: Jinan Fu Chi Technology Co ltd
Priority date: 2021-06-11
Filing date: 2021-06-11
Publication date: 2021-12-03
Anticipated expiration: 2031-06-11

Abstract

The utility model discloses a piston rod end control multistage lifting oil cylinder, which comprises a cylinder barrel with one closed end and a piston rod in the cylinder barrel, wherein the piston rod comprises a rod head and a rod barrel, the rod head is arranged at one end of the rod barrel, and is provided with a first oil inlet and outlet and a second oil inlet and outlet, a core pipe is arranged on the central axis in the rod barrel, the first oil inlet and outlet is communicated with the core pipe, and the second oil inlet and outlet is communicated with the rod barrel; a first piston cylinder and a second piston cylinder are sequentially arranged between the rod cylinder and the cylinder barrel from inside to outside, one end of each cylinder close to the rod head is sealed by a front cover, and the other ends of the rod cylinder, the first piston cylinder and the second piston cylinder are respectively provided with a piston; the oil inlet and the oil outlet of the oil cylinder are arranged on the rod head of the piston rod end, so that the oil pipe is prevented from being connected with the cylinder barrel, the oil pipe is longer, in addition, the single-stage lifting oil cylinder is changed into the multi-stage lifting oil cylinder, the size of the cylinder barrel can be greatly reduced in the same stroke range, the occupied area of the bottom of a carriage in a large area is avoided, and the whole weight of the equipment is greatly reduced.

Description

Piston rod end controlled multi-stage lifting oil cylinder

Technical Field

The utility model belongs to the technical field of the hydro-cylinder, especially, relate to a piston rod end control multi-stage lift cylinder.

Background

In the design of mud car, lift cylinder can be used usually, control the upset in mud car carriage, under the normal condition, the control end of lift cylinder is the business turn over hydraulic fluid port promptly and all sets up on lift cylinder's cylinder body, then install lift cylinder body under the carriage of mud car, the tailpiece of the piston rod is installed on the car crane span structure of mud car, this kind of mode, need adopt very long oil pipe, in addition because what adopt is single-stage lift cylinder, in order to guarantee lift cylinder's stroke, the cylinder body of design is generally big partially, thereby lead to oil pipe and cylinder body to occupy the most space under the mud car carriage, not only make the equipment whole heavy, and arrange more littleer.

SUMMERY OF THE UTILITY MODEL

In view of the defects in the prior art, the object of the present invention is to provide a piston rod end controlled multi-stage lift cylinder.

In order to solve the technical problem, the utility model discloses a following technical scheme: a piston rod end controlled multi-stage lifting oil cylinder comprises a cylinder barrel with one closed end and a piston rod in the cylinder barrel, wherein the piston rod comprises a rod head and a rod barrel, the rod head is arranged at one end of the rod barrel and is provided with a first oil inlet and outlet and a second oil inlet and outlet, a core pipe is arranged on the central axis of the rod barrel, the first oil inlet and outlet is communicated with the core pipe, and the second oil inlet and outlet is communicated with the rod barrel; the rod cylinder and the cylinder barrel are sequentially provided with a first piston cylinder and a second piston cylinder from inside to outside, one end of each cylinder close to the rod head is sealed by a front cover, the other end of the rod cylinder is provided with a first piston which penetrates through the core tube, the other end of the first piston cylinder is provided with a second piston, and the other end of the second piston cylinder is provided with a third piston.

As a further improvement of the utility model, the front cover and the adjacent rod barrel or piston barrel or cylinder barrel are provided with a DH-type dustproof ring, a guide belt, a first sealing ring and a second sealing ring.

As a further improvement of the utility model, the first rod cylinder and the first piston cylinder are provided with a spacer bush on one side away from the rod head, and the spacer bush is sleeved on the outer wall of the rod cylinder and keeps a certain clearance with the inner wall of the first piston cylinder.

As a further improvement of the utility model, the inner wall of the spacer sleeve is provided with an annular groove and a third embedded sealing ring.

As a further improvement of the utility model, an inner wall of the piston is provided with an annular groove and an embedded sealing ring IV.

As a further improvement, the first piston hole is correspondingly formed in the first rod cylinder and the first piston, the second piston hole is correspondingly formed in the first piston cylinder and the second piston outside the first piston cylinder, and the third piston hole is correspondingly formed in the second piston cylinder and the second piston outside the second piston cylinder.

As a further improvement, a piston outer wall open on the right side of piston hole two has the annular groove to the embedded support ring one with a piston cylinder inner wall contact, two outer walls of piston open on the right side of piston hole three has the annular groove to the embedded support ring two with two inner wall contacts of piston cylinder three outer wall open on the right side of piston hole three has the annular groove to the embedded support ring three with the cylinder inner wall contact.

As a further improvement, the cylinder outer wall is symmetrically welded with a connecting shaft.

To sum up, the utility model discloses following useful technological effect has:

1. the single-stage lifting oil cylinder at the bottom of the sludge vehicle is changed into the multi-stage lifting oil cylinder, an oil inlet and an oil outlet of the oil cylinder are arranged on the rod head of the piston rod end, the oil inlet and the oil outlet of the hydraulic device and the piston rod end are connected through the oil pipe, the oil pipe is prevented from being connected with the cylinder barrel, the oil pipe is longer, the sludge vehicle carriage bottom occupying a large area is occupied, the single-stage lifting oil cylinder is changed into the multi-stage lifting oil cylinder, the size of the cylinder barrel can be greatly reduced in the same stroke range, the carriage bottom area occupying the large area is avoided, and the whole weight of the equipment is greatly reduced.

2. A DH-type dustproof ring, a guide belt, a first sealing ring and a second sealing ring are arranged between the front cover and the adjacent rod cylinder or piston cylinder or cylinder, so that the dustproof, guide and sealing effects are achieved, and dust is prevented from entering piston cylinder cavities at all levels and hydraulic oil is prevented from leaking outside.

3. And a third sealing ring and a fourth sealing ring are arranged on the inner wall of the spacer sleeve and the inner wall of the first piston, so that hydraulic oil in each chamber can be prevented from leaking.

4. The rod cylinder, the piston cylinder I and the piston cylinder II are provided with the piston hole I, the piston hole II and the piston hole III, so that all stages of chambers are communicated under a certain working state, hydraulic oil can flow from one chamber to the other chamber, and the purpose of multistage motion and extension is achieved.

5. The outer walls of the first piston and the second piston are provided with a first support ring, a second support ring and a third support ring, so that the first piston and the second piston can be fixedly supported, and relatively closed cavities are formed among the rod cylinder, the first piston cylinder, the second piston cylinder and the cylinder.

Drawings

The invention will be further described with reference to the accompanying drawings:

FIG. 1 is a schematic diagram of a half-section structure of a piston rod end controlled multi-stage lift cylinder according to the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is an enlarged view of FIG. 1 at A;

FIG. 4 is an enlarged view of FIG. 1 at B;

in the figure: 1 piston rod, 101 rod head, 102 rod cylinder, 103 core tube, 104 inlet and outlet ports I, 105 inlet and outlet ports II, 2 cylinder barrel, 3 piston cylinder I, 4 piston cylinder II, 5 front cover, 6 spacer bush, 701DH type dustproof ring, 702 guide belt, 703 seal ring I, 704 seal ring II, 705 seal ring III, 706 seal ring IV, 707 seal ring V, 8 piston I, 9 piston II, 1001 piston hole I, 1002 piston hole II, 1003 piston hole III, 1101 support ring I, 1102 support ring II, 1103 support ring III, 12 connecting shaft, 1301 first rod cavity, 1302 second rod cavity, 1303 third rod cavity, 1304 fourth rod cavity, 1305 rodless cavity, and 14 piston III.

Detailed Description

The present invention will be described in further detail with reference to the accompanying fig. 1-4.

The embodiment of the utility model discloses piston rod end control multi-stage lift cylinder. Referring to fig. 1-4, the lifting device comprises a cylinder barrel 2 with one closed end and a piston rod 1 in the cylinder barrel 2, connecting shafts 12 are symmetrically welded on two sides of the outer wall of the cylinder barrel 2, and the connecting shafts 12 and an external multi-stage lifting oil cylinder swing shaft are positioned and installed; the piston rod 1 comprises a rod head 101 and a rod barrel 10, wherein the rod head 101 is arranged at one end of the rod barrel 102, and is provided with a first oil inlet/outlet 104 and a second oil inlet/outlet 105, a core pipe 103 is arranged on the central axis of the rod barrel 102, the first oil inlet/outlet 104 is communicated with the core pipe 103, and the second oil inlet/outlet 105 is communicated with the rod barrel 102; a first piston cylinder 3 and a second piston cylinder 4 are sequentially arranged between the rod cylinder 102 and the cylinder barrel 2 from inside to outside, one end of each cylinder close to the rod head 101 is sealed by a front cover 5 corresponding to the circumferential dimension of the rod head, the other end of the rod cylinder 102 is provided with a first piston 8 penetrating through a core pipe 103, the other end of the first piston cylinder 3 is provided with a second piston 9, and the other end of the second piston cylinder 4 is provided with a third piston 14. The first piston 8, the second piston 9 and the third piston 14 are buckled in sequence to form a similar step form. It should be noted that the outer wall of the core tube 103 and the inner wall of the rod barrel 102 form a first rod cavity 1301, the outer wall of the rod barrel 102 and the inner wall of the piston barrel i 3 form a second rod cavity 1302, the outer wall of the piston barrel i 3 and the inner wall of the piston barrel i 4 form a third rod cavity 1303, the outer wall of the piston barrel i 4 and the inner wall of the cylinder barrel 2 form a fourth rod cavity 1304, and the inner wall of the cylinder barrel 2 at the end far away from the rod head 101, the piston i 8, the piston i 9 and the piston i 14 form an integrated rodless cavity 1305.

DH-type dustproof rings 701, guide belts 702, first sealing rings 703 and second sealing rings 704 are arranged between each front cover 5 and the adjacent rod barrel 102 or first piston barrel 3 or second piston barrel 4 or cylinder barrel 2. A DH-type dustproof ring 701, a guide belt 702, a first sealing ring 703 and a second sealing ring 704 are arranged between the front cover 5 and the adjacent rod cylinder 102 or piston cylinder or cylinder barrel 2, so that the dustproof, guiding and sealing effects are achieved, and dust is prevented from entering piston cylinder cavities at all levels and hydraulic oil is prevented from leaking outside.

Between the rod cylinder 102 and the piston cylinder 3, a spacer 6 is arranged at one side far away from the rod head 101, namely the front position of the piston 8, the spacer 6 is sleeved on the outer wall of the rod cylinder 102 and keeps a certain gap with the inner wall of the piston cylinder 3, an annular groove is formed in the inner wall of the spacer 6, and a sealing ring III 705 is embedded in the annular groove, and the sealing ring III 705 can prevent hydraulic oil in a cavity 1302 of a second rod cavity formed by the outer wall of the rod cylinder 102 and the inner wall of the piston cylinder 1032 from leaking, so that pressure is influenced. In addition, the inner wall of the first piston 8 is provided with an annular groove and a fourth sealing ring 76 is embedded in the annular groove, and the fourth sealing ring 76 is in contact with the core pipe 103, so that hydraulic oil in a cavity of the first rod cavity 1301 formed by the outer wall of the core pipe 103 and the inner wall of the rod cylinder 102 can be prevented from leaking, and pressure is influenced.

In addition, the rod cylinder 12 and the piston cylinder 8 are correspondingly provided with a piston hole I1001, the piston cylinder I3 and the piston II 9 on the outer side thereof are correspondingly provided with a piston hole II 1002, and the piston cylinder II 4 and the piston II 9 on the outer side thereof are correspondingly provided with a piston hole III 1003; when the piston rods of all the stages do not extend, the piston hole I1001, the piston hole II 1002 and the piston hole III 1003 are sequentially staggered from left to right in the axial direction of the cylinder barrel 2. The piston holes are sequentially arranged, so that all the chambers are communicated under a certain working state, hydraulic oil can flow from one chamber to the other chamber, and the purpose of multi-stage movement and extension is achieved.

The outer wall of the first piston 8 is provided with an annular groove on the right side of the second piston hole 1002 and is embedded with a first support ring 1101 in contact with the inner wall of the first piston cylinder 3, the outer wall of the second piston 9 is provided with an annular groove on the right side of the third piston hole 1003 and is embedded with a second support ring 1102 in contact with the inner wall of the second piston cylinder 4, and the outer wall of the third piston 14 is provided with an annular groove on the right side of the third piston hole 1003 and is embedded with a third support ring 1103 in contact with the inner wall of the cylinder barrel 2; the plurality of support rings are arranged, so that the second rod cavity 1302, the third rod cavity 1303 and the fourth rod cavity 1304 are relatively closed to form a closed cavity, and the closed cavity is equivalent to a switch, so that the first piston hole 1001, the second piston hole 1002 and the third piston hole 1003 can be opened or closed according to the telescopic motion positions of the piston rod 1, the first piston cylinder 3 and the second piston cylinder 4 in the cylinder barrel 2, hydraulic oil flows from the first rod cavity 1301 to the second rod cavity 1302, flows to the third rod cavity 1303 and finally flows into the fourth rod cavity 1304 to control the telescopic motion of each stage. In addition, in order to prevent the hydraulic oil from leaking, a circle of five sealing rings 707 corresponding to the circumference of the supporting ring are respectively arranged on the right side of the supporting ring I1101, on the outer wall of the piston I8, on the right side of the supporting ring II 1102, on the outer wall of the piston II 9, on the right side of the supporting ring III 1103 and on the outer wall of the piston III 14.

The embodiment of the utility model provides a piston rod end control multi-stage lift cylinder's implementation principle does: when the piston rods of all levels extend out; the hydraulic oil enters the core pipe 103 from the oil inlet/outlet port I104, and finally flows into the rodless cavity 1305 from the core pipe 103, because the sectional areas of the first piston 8, the second piston 9 and the third piston 14 are different in size, the area of the first piston is large, the output thrust of the first piston is large, the large-area first piston, namely the third piston 14, is pushed out by the hydraulic oil in the rodless cavity 1305 first, the third piston 14 can synchronously drive the second piston 9 and the first piston 8 to push out in the pushing-out process, namely the second piston 4, the first piston 3 and the piston rod 1 to push out, in the pushing-out process, the second piston 4, the first piston 3 and the piston rod 1 synchronously move from the inside to the outside of the cylinder barrel 2, when the second piston 4 on the outermost side in the circumferential direction reaches the leftmost end position of the cylinder barrel 2, the second piston 4 stops moving, at the moment, the hydraulic oil in the rodless cavity 1305 pushes the second piston 9 to move to the left, the second piston 9 can synchronously drive the first piston 8 to move to the left, the first piston cylinder 3 and the piston rod 1 are driven to synchronously move towards the left from the cylinder barrel 2, when the first piston cylinder 3 reaches the leftmost end position of the second piston cylinder 4, the first piston cylinder 3 stops moving, hydraulic oil in the rodless cavity 1305 pushes the first piston 8 to move towards the left, namely the piston rod 1 is pushed to move towards the left, and when the piston rod 1 reaches the leftmost end position of the first piston cylinder 3, the piston rod 1 stops moving, so that the three-stage piston rods sequentially extend out. In the extending process, the second piston cylinder 4, the first piston cylinder 3 and the piston rod 1 form a three-level piston rod, and the three-level piston rod sequentially extends.

When the piston rods of each stage retract, hydraulic oil enters the first rod cavity 1301 from the oil inlet/outlet port II 105 and flows into the second rod cavity 1302 from the piston hole I1001, the hydraulic oil in the first rod cavity 1301 and the second rod cavity 1302 pushes the piston I8 to move rightwards, so that the piston rod 1 is pushed to retract rightwards until the piston rod 1 is completely retracted into the piston cylinder I3, when the piston rod 1 retracts to the rightmost end position, namely when the support ring I1101 reaches the right side of the piston hole II 1002, the second rod cavity 1302 and the third rod cavity 1303 are communicated through the piston hole II 1002, the hydraulic oil flows into the third rod cavity 1303 from the second rod cavity 1302, the hydraulic oil in the third rod cavity 1303 pushes the piston II 9 to move rightwards, so that the piston cylinder I3 is driven to move rightwards until the piston cylinder I4 is completely retracted, when the piston cylinder I3 retracts to the rightmost end position, namely when the support ring II reaches the right side of the piston hole III 1003, the third rod chamber 1303 and the fourth rod chamber 1304 are communicated through the piston hole III 1003, so that hydraulic oil flows into the fourth rod chamber 1304 from the third rod chamber 1302, and the hydraulic oil in the fourth rod chamber 1304 pushes the piston III 14 to move rightwards, so that the piston cylinder II 4 is pushed to retract rightwards until the piston cylinder II is completely retracted into the cylinder barrel 2, and the whole retraction process is completed. In the retracting process, the piston rod 1, the first piston cylinder 3 and the second piston cylinder 4 form a three-level piston rod, and the three-level piston rod retracts sequentially.

The utility model has the advantages of it is very good, through the single-stage lift cylinder with the mud vehicle bottom change multistage lift cylinder into, and set up the business turn over hydraulic fluid port of hydro-cylinder on the pole head of tailpiece of the piston rod, with oil pipe the business turn over hydraulic means and tailpiece of the piston rod end business turn over hydraulic means can, avoid oil pipe and cylinder to link to each other, lead to oil pipe longer, occupy the mud vehicle carriage bottom of the large tracts of land, single-stage lift cylinder changes multistage lift cylinder in addition, in the same stroke scope, can reduce the volume of cylinder greatly, avoid occupying the carriage bottom area of the large tracts of land, the whole weight of equipment has been alleviateed greatly.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only, not by way of limitation, since other embodiments will become apparent to those skilled in the art upon consideration of the following detailed description of the invention without any creative effort.

Claims

1. The utility model provides a multistage lift cylinder of piston rod end control, includes piston rod (1) in one end confined cylinder (2) and cylinder (2), its characterized in that: the piston rod (1) comprises a rod head (101) and a rod barrel (102), the rod head (101) is arranged at one end of the rod barrel (102), a first oil inlet and outlet (104) and a second oil inlet and outlet (105) are arranged on the rod barrel (102), a core tube (103) is arranged on the central axis of the rod barrel (102), the first oil inlet and outlet (104) is communicated with the core tube (103), and the second oil inlet and outlet (105) is communicated with the rod barrel (102); the novel golf club head is characterized in that a first piston cylinder (3) and a second piston cylinder (4) are sequentially arranged between the rod cylinder (102) and the cylinder barrel (2) from inside to outside, one end, close to the club head (101), of each cylinder is sealed by a front cover (5), a first piston (8) penetrating through a core pipe (103) is arranged at the other end of the rod cylinder (102), a second piston (9) is arranged at the other end of the first piston cylinder (3), and a third piston (14) is arranged at the other end of the second piston cylinder (4).

2. The piston rod end controlled multi-stage lift cylinder of claim 1, wherein: a DH-type dustproof ring (701), a guide belt (702), a first sealing ring (703) and a second sealing ring (704) are arranged between the front cover (5) and the adjacent rod cylinder (102) or piston cylinder (3) or piston cylinder (9) or cylinder barrel (2).

3. The piston rod end controlled multi-stage lift cylinder of claim 1, wherein: a spacer bush (6) is arranged between the rod cylinder (102) and the piston cylinder I (3) on one side far away from the rod head (101), and the spacer bush (6) is sleeved on the outer wall of the rod cylinder (102) and keeps a certain gap with the inner wall of the piston cylinder I (3).

4. The piston rod end controlled multi-stage lift cylinder of claim 3, wherein: and an annular groove is formed in the inner wall of the spacer bush (6) and a third sealing ring (705) is embedded in the annular groove.

5. The piston rod end controlled multi-stage lift cylinder of claim 1, wherein: and an annular groove is formed in the inner wall of the first piston (8) and a fourth sealing ring (706) is embedded in the annular groove.

6. The piston rod end controlled multi-stage lift cylinder of claim 1, wherein: the rod cylinder (102) and the piston I (8) are correspondingly provided with a piston hole I (1001), the piston cylinder I (3) and the piston II (9) on the outer side of the piston cylinder I are correspondingly provided with a piston hole II (1002), and the piston cylinder II (4) and the piston II (9) on the outer side of the piston cylinder II are correspondingly provided with a piston hole III (1003).

7. The piston rod end controlled multi-stage lift cylinder of claim 6, wherein: the piston is characterized in that the outer wall of the first piston (8) is provided with an annular groove on the right side of the second piston hole (1002), and is embedded with a first support ring (1101) in contact with the inner wall of the first piston cylinder (3), the outer wall of the second piston (9) is provided with an annular groove on the right side of the third piston hole (1003), and is embedded with a second support ring (1102) in contact with the inner wall of the second piston cylinder (4), the outer wall of the third piston (14) is provided with an annular groove on the right side of the third piston hole (1003), and is embedded with a third support ring (1103) in contact with the inner wall of the cylinder barrel (2).

8. The piston rod end controlled multi-stage lift cylinder of any one of claims 1-7, wherein: connecting shafts (12) are symmetrically welded on two sides of the outer wall of the cylinder barrel (2).