CN214828662U

CN214828662U - Lifting oil cylinder with buffer device

Info

Publication number: CN214828662U
Application number: CN202121012851.XU
Authority: CN
Inventors: 李朝; 戴洪辉; 卢敏龙; 毛朝忠
Original assignee: Ningbo Zhongtian Haide Hydraulic Co ltd
Current assignee: Ningbo Zhongtian Haide Hydraulic Co ltd
Priority date: 2021-05-13
Filing date: 2021-05-13
Publication date: 2021-11-23
Anticipated expiration: 2031-05-13

Abstract

The utility model relates to a lifting oil cylinder with a buffer device, which comprises a cylinder body, a piston rod, a piston and a guide sleeve, wherein the guide sleeve is fixed at one end of the cylinder body, the piston is fixed on the piston rod and is positioned at the other end in the cylinder body, and the piston rod is inserted in the guide sleeve and makes a linear reciprocating motion along the axial direction of the cylinder body; the inner center of the piston is hollowed, and a buffer sleeve is arranged in the piston and is matched with an axial bulge arranged on the end wall of the cylinder body; one end of the buffer sleeve is limited on a circle of limiting strips arranged on one side of the piston, and the other end of the buffer sleeve is limited through a plug arranged on the other side of the piston; two oil guide pipelines are arranged on the end wall of the piston, are arranged along the axial direction of the piston and are symmetrically arranged, two inclined flow guide holes communicated with the oil guide pipelines are arranged in the cylinder body, and the inclined flow guide holes are communicated with an oil inlet pipeline arranged on the cylinder body; the utility model discloses make the hydro-cylinder start-up accelerate and buffer on the structure more compact simple.

Description

Lifting oil cylinder with buffer device

Technical Field

The utility model belongs to the technical field of the hydro-cylinder, especially, relate to a take buffer's promotion hydro-cylinder.

Background

The oil cylinder belongs to one kind of hydraulic cylinder, and is one hydraulic executing element converting hydraulic energy into mechanical energy and making linear reciprocating motion (or swinging motion). When it is used to implement reciprocating motion, it can omit speed-reducing device, and has no transmission gap, and its motion is stable, so that it can be extensively used in various mechanical hydraulic systems. The existing lifting oil cylinder basically has a buffering function, as shown in fig. 1, but the design of the lifting oil cylinder at a buffering device is unreasonable, and a diversion hole 9 for driving a piston and a piston rod is arranged on the piston 30 in a horizontal linear shape, so that the starting of the oil cylinder is slow, and a buffering sleeve 50 used on the buffering device is clamped and fixed with the piston 3 through a steel wire retaining ring 10, so that the overall structure is complex.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the not enough of prior art existence, and provide a take buffer's promotion hydro-cylinder for the hydro-cylinder starts to accelerate and the structure on the buffer is more compact simple.

The utility model aims at completing the technical proposal that the lifting oil cylinder with the buffer device comprises a cylinder body, a piston rod, a piston and a guide sleeve, wherein the guide sleeve is fixed at one end of the cylinder body, the piston is fixed on the piston rod and is positioned at the other end in the cylinder body, and the piston rod is inserted in the guide sleeve and linearly reciprocates along the axial direction of the cylinder body; the inner center of the piston is hollowed, and a buffer sleeve is arranged in the piston and is matched with an axial bulge arranged on the end wall of the cylinder body; one end of the buffer sleeve is limited on a circle of limiting strips arranged on one side of the piston, and the other end of the buffer sleeve is limited through a plug arranged on the other side of the piston; the end wall of the piston is provided with two oil guide pipelines which are arranged along the axial direction of the piston and are symmetrically arranged, two inclined flow guide holes communicated with the oil guide pipelines are arranged in the cylinder body, and the inclined flow guide holes are communicated with an oil inlet pipeline arranged on the cylinder body.

Preferably, the inner center of the piston is a stepped hole and is divided into a first mounting hole and a second mounting hole, the aperture of the first mounting hole is smaller than that of the second mounting hole, and the limiting strip is arranged on one side of the first mounting hole.

Preferably, the first mounting hole is internally provided with a buffer sleeve, the hole wall of the second mounting hole is a threaded surface, the plug is fixed on the piston in a threaded screwing mode, an O-shaped ring is arranged between the second mounting hole and the plug, and the O-shaped ring is embedded in an annular groove arranged on the plug.

Preferably, the oil guide pipeline is L-shaped in cross section, one end of the oil guide pipeline is communicated with the side wall of the piston, and the other end of the oil guide pipeline is communicated with the end wall of the piston.

Preferably, the two oblique diversion holes are symmetrically distributed along the axial center line of the cylinder body, and an included angle a between the two oblique diversion holes is an obtuse angle.

Preferably, a sleeve is installed in the cylinder body, the sleeve is located on the side of the guide sleeve, and the inner wall of the sleeve is in contact with the piston rod.

Preferably, one end of the sleeve abuts against a transition surface arranged on the cylinder body, and the other end of the sleeve abuts against the guide sleeve.

The utility model has the advantages that: the buffer sleeve is more convenient to mount through the hollow design of the inner center of the piston, and compared with the existing buffer sleeve, a steel wire check ring clamping and fixing structure is omitted, so that the structure is more compact and simple; meanwhile, the inclined diversion holes and the oil inlet pipeline arranged on the piston are arranged, so that the starting of the oil cylinder is quicker.

Drawings

Fig. 1 is a schematic view of a cross-sectional structure of a conventional lift cylinder in a front view.

Fig. 2 is the schematic view of the main section structure of the lift cylinder of the present invention.

Fig. 3 is an enlarged schematic view of a portion a in fig. 2.

The reference numbers in the drawings are respectively: 1. a cylinder body; 2. a piston rod; 3. a piston; 4. a guide sleeve; 5. a buffer sleeve; 6. a plug; 7. an O-shaped ring; 8. a sleeve; 9. a flow guide hole; 10. a steel wire retainer ring; 11. an axial projection; 12. oblique flow guide holes; 13. an oil inlet pipeline; 14. a transition surface; 31. a limiting strip; 32. an oil guide pipeline; 33. a first mounting hole; 34. a second mounting hole; 61. an annular groove.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings: as shown in the attached figure 2, the utility model comprises a cylinder body 1, a piston rod 2, a piston 3 and a guide sleeve 4, wherein the guide sleeve 4 is fixed at one end of the cylinder body 1, the piston 3 is fixed on the piston rod 2 and is positioned at the other end in the cylinder body 1, and the piston rod 2 is inserted in the guide sleeve 4 and makes a linear reciprocating motion along the axial direction of the cylinder body 1; the inner center of the piston 3 is hollowed, and a buffer sleeve 5 is arranged in the piston 3 and is matched with an axial bulge 11 arranged on the inner end wall of the cylinder body 1; one end of the buffer sleeve 5 is limited on a circle of limiting strips 31 arranged on one side of the piston 3, and the other end of the buffer sleeve 5 is limited through a plug 6 arranged on the other side of the piston 3; through the hollow design in the center in the piston for the cushion collar installation is more convenient, compares current cushion collar installation, has saved steel wire retaining ring screens fixed knot and has constructed, and the structure is more compact simple. Two oil guide pipelines 32 are arranged on the end wall of the piston 3, the oil guide pipelines 32 are arranged along the axial direction of the piston 3 and are symmetrically arranged, two inclined flow guide holes 12 communicated with the oil guide pipelines 32 are arranged in the cylinder body 1, and the inclined flow guide holes 12 are communicated with an oil inlet pipeline 13 arranged on the cylinder body 1; therefore, the hydraulic oil from the oil inlet pipeline 13 is divided into two paths and respectively introduced into the inclined flow guide holes 12 and flows into the oil guide pipelines 32, and the starting speed of the oil cylinder can be further increased.

As shown in fig. 3, the inner center of the piston 3 is a stepped hole and is divided into a first mounting hole 33 and a second mounting hole 34, the aperture of the first mounting hole 33 is smaller than that of the second mounting hole 34, and the limiting strip 31 is arranged on one side of the first mounting hole 33; can be convenient for the installation of cushion collar 5 and end cap 6 like this, simultaneously through the shoulder hole of this design for cushion collar 5 is more convenient in the installation, compares current cushion collar installation, has saved steel wire retaining ring screens fixed knot and has constructed, and the structure is more compact simple, and stability in the use is also better.

Install cushion collar 5 in the first mounting hole 33, the pore wall of second mounting hole 34 is the flank of screw, and end cap 6 connects the mode soon through the screw and fixes on piston 3, and it is more convenient to install like this, and installs O type circle 7 between second mounting hole 34 and end cap 6, and O type circle 7 embedding can prevent like this that hydraulic oil from leaking out between piston 3 and end cap 6 in the annular groove 61 that end cap 6 was equipped with.

The cross section of the oil guide pipeline 32 is L-shaped, one end of the oil guide pipeline 32 is communicated with the side wall of the piston 3, and the other end of the oil guide pipeline 32 is communicated with the end wall of the piston 3, so that the oil guide pipeline is convenient to machine and form, and hydraulic oil from the inclined flow guide hole 12 can smoothly flow into a space between the cylinder body and the piston rod.

The two oblique diversion holes 12 are symmetrically distributed along the axial center line of the cylinder body 1, so that the stability of force application is better and deflection is not easy to occur when the piston and the piston rod are driven; and the included angle a between the two oblique diversion holes 12 is an obtuse angle, so that the processing is convenient, and the starting speed of the oil cylinder can be further increased by matching with the oil guide pipeline.

As shown in the attached drawing 1, a sleeve 8 is installed in the cylinder body 1, the sleeve 8 is positioned on the side of the guide sleeve 4, and the inner wall of the sleeve 8 is in contact with the piston rod 2; the length of the guide sleeve 4 can be shortened by arranging the sleeve 8, and the contact area between the piston rod 2 and the guide sleeve can be further reduced, so that the operation stability of the whole lifting oil cylinder is better.

One end of the sleeve 8 is abutted against a transition surface 14 arranged on the cylinder body 1, and the other end of the sleeve 8 is abutted against the guide sleeve 4, so that the sleeve 8 can be prevented from moving after being installed.

The present invention is not limited to the above embodiments, and any change is made on the shape or material composition, and all the structural designs provided by the present invention are all the deformation of the present invention, which should be considered within the protection scope of the present invention.

Claims

1. A lifting oil cylinder with a buffering device comprises a cylinder body (1), a piston rod (2), a piston (3) and a guide sleeve (4), wherein the guide sleeve (4) is fixed at one end of the cylinder body (1), the piston (3) is fixed on the piston rod (2) and located at the other end in the cylinder body (1), and the piston rod (2) penetrates through the guide sleeve (4) and linearly reciprocates along the axial direction of the cylinder body (1); the method is characterized in that: the inner center of the piston (3) is hollowed, and a buffer sleeve (5) is arranged in the piston (3) and is matched with an axial bulge (11) arranged on the inner end wall of the cylinder body (1); one end of the buffer sleeve (5) is limited on a circle of limiting strips (31) arranged on one side of the piston (3), and the other end of the buffer sleeve (5) is limited through a plug (6) arranged on the other side of the piston (3); the piston is characterized in that two oil guide pipelines (32) are arranged on the end wall of the piston (3), the oil guide pipelines (32) are arranged along the axial direction of the piston (3) and are symmetrically arranged, two inclined flow guide holes (12) communicated with the oil guide pipelines (32) are arranged in the cylinder body (1), and the inclined flow guide holes (12) are communicated with an oil inlet pipeline (13) arranged on the cylinder body (1).

2. The lift cylinder with a shock absorber as set forth in claim 1, wherein: the center is for the shoulder hole and divide into first mounting hole (33) and second mounting hole (34) in piston (3), the aperture of first mounting hole (33) is less than the aperture of second mounting hole (34), just spacing (31) set up one side of first mounting hole (33).

3. The lift cylinder with a shock absorber as set forth in claim 2, wherein: install cushion collar (5) in first mounting hole (33), the pore wall of second mounting hole (34) is the flank of screw, end cap (6) are connected the mode soon through the screw and are fixed on piston (3), and second mounting hole (34) with install O type circle (7) between end cap (6), just O type circle (7) embedding is in annular groove (61) that end cap (6) were equipped with.

4. The lift cylinder with a shock absorber as set forth in claim 1, wherein: the section of the oil guide pipeline (32) is L-shaped, one end of the oil guide pipeline (32) is communicated with the side wall of the piston (3), and the other end of the oil guide pipeline (32) is communicated with the end wall of the piston (3).

5. The lift cylinder with a shock absorber as set forth in claim 1, wherein: two slant water conservancy diversion hole (12) are the symmetric distribution along the axial lead of cylinder body (1), and two contained angle a between slant water conservancy diversion hole (12) is the obtuse angle.

6. The lift cylinder with a shock absorber as set forth in claim 1, wherein: install sleeve (8) in cylinder body (1), sleeve (8) are located uide bushing (4) side, just the inner wall of sleeve (8) with piston rod (2) contact.

7. The lift cylinder with a shock absorber as set forth in claim 6, wherein: one end of the sleeve (8) is abutted against a transition surface (14) arranged on the cylinder body (1), and the other end of the sleeve (8) is abutted against the guide sleeve (4).