CN215109787U - Follow-up oil cylinder with combined piston - Google Patents

Abstract

The utility model relates to an hydro-cylinder technical field discloses a follow-up hydro-cylinder of combination formula piston is equipped with, it includes hydro-cylinder body (1) and installs piston rod (2) in hydro-cylinder body (1), install sealing washer (3) on piston rod (2), still include combination formula piston (4), install on combination formula piston (4) sealing washer (3), combination formula piston (4) are including preceding circle (41) and back circle (42), preceding circle (41) and back circle (42) form an annular mounting groove (40), the notch department of mounting groove (40) is equipped with spacing circular bead (401), still including sealed guide ring (43), sealed guide ring (43) and sealing washer (3) are all placed in mounting groove (40). The utility model adopts the design of the combined piston, the structure is simple, the installation is convenient, and the cost is reduced; the oil cylinder is safer and more durable, and a more stable hydraulic system of the whole vehicle is provided.

Description

Follow-up oil cylinder with combined piston

Technical Field

The utility model relates to a hydro-cylinder technical field has especially related to a follow-up hydro-cylinder of combination formula piston is equipped with.

Background

In the existing hydraulic overturning lifting cylinder assembly, a piston assembly structure is mostly formed by assembling a piston body and a plurality of sealing elements, and the concrete expression is that a groove for installing the sealing elements is designed on the surface of the piston body, a check ring and an O-shaped sealing ring are usually installed at the bottom end of the groove, and a boiled sealing ring guide belt is installed on the outer ring of the O-shaped sealing ring; when the piston passes through the transition position of the follow-up section when the oil cylinder is pulled back, the hydraulic impact caused by instantaneous pressure change of the upper cavity and the lower cavity of the piston is particularly easy to cause extrusion deformation and fracture failure of the sealing guide belt, so that the oil cylinder slides downwards, and the use of the whole hydraulic overturning system is seriously influenced.

The prior invention patent No. 201280007530.8 has the defect of poor stability.

SUMMERY OF THE UTILITY MODEL

The utility model provides a follow-up hydro-cylinder of combination formula piston is equipped with to the shortcoming among the prior art.

In order to solve the technical problem, the utility model discloses a following technical scheme can solve:

the utility model provides a follow-up hydro-cylinder with combination formula piston, include the hydro-cylinder body and install the piston rod at the hydro-cylinder body, install the sealing washer sealed with hydro-cylinder body inner wall on the piston rod, still include combination formula piston, the sealing washer is installed on combination formula piston, combination formula piston is established including the cover and is established preceding circle and back circle at the piston rod tip, preceding circle and the coaxial setting of back circle form an annular mounting groove jointly on the outside anchor ring, the notch of mounting groove sets up outwards, the notch department of mounting groove is equipped with spacing circular bead, still including sealed guide ring, sealed guide ring and sealing washer are all placed in the mounting groove, sealed guide ring is the ring body of T type for the cross-section, sealed guide ring is located the outside of sealing washer and compresses tightly the sealing washer in the mounting groove with spacing circular bead cooperation.

Preferably, the two limiting shoulders are arranged on the front ring and the rear ring respectively, one side of each limiting shoulder facing the mounting groove is defined as an inner annular surface, one end, connected with the front ring or the rear ring, of each limiting shoulder is defined as a fixed end, the other end of each limiting shoulder is an extending end, and the inner annular surfaces of the limiting shoulders are obliquely arranged to enable the thickness of the extending ends of the limiting shoulders to be gradually reduced.

Preferably, the front ring and the rear ring are respectively provided with a front ring small hole and a rear ring small hole, the front ring small hole is communicated into the mounting groove, and the rear ring small hole is communicated into the mounting groove.

Preferably, the front circle of small holes is circumferentially distributed on the front circle, and the rear circle of small holes is circumferentially distributed on the rear circle.

Preferably, the piston rod sealing ring is arranged between the end of the piston rod and the combined piston.

Preferably, the front ring is an annular body with a rectangular cross section, the rear ring is an annular body with an L-shaped cross section, and the thicknesses of the front ring and the rear ring are the same.

The utility model discloses owing to adopted above technical scheme, have apparent technological effect: the combined piston design is adopted, the structure is simple, the installation is convenient, and the cost is reduced; the oil cylinder is safer and more durable, and a more stable hydraulic system of the whole vehicle is provided.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a partially enlarged view of fig. 1.

Fig. 3 is a schematic mechanical view of the combined piston and seal of fig. 1.

The names of the parts indicated by the numerical references in the drawings are as follows: 1-oil cylinder body, 2-piston rod, 3-sealing ring, 4-combined piston, 5-piston rod sealing ring, 40-mounting groove, 41-front ring, 42-rear ring, 43-sealing guide ring, 401-limiting shoulder, 411-front ring small hole and 421-rear ring small hole.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Example 1

The utility model provides a follow-up cylinder with combination formula piston, as shown in the figure, include hydro-cylinder body 1 and install piston rod 2 in hydro-cylinder body 1, install on the piston rod 2 with hydro-cylinder body 1 inner wall sealing's sealing washer 3, still include combination formula piston 4, sealing washer 3 is installed on combination formula piston 4, combination formula piston 4 is including establishing preceding circle 41 and the back circle 42 at piston rod 2 tip, preceding circle 41 and the coaxial setting of back circle 42 form an annular mounting groove 40 jointly on the outside anchor ring, the notch of mounting groove 40 sets up outwards, the notch department of mounting groove 40 is equipped with spacing circular bead 401, still include sealed guide ring 43, sealed guide ring 43 and sealing washer 4 are all placed in mounting groove 40, sealed guide ring 43 is the ring body that the cross-section is T type, sealed guide ring 43 is located the outside of sealing washer 3 and compresses tightly sealing washer 3 in mounting groove 40 with spacing circular bead 401 cooperation.

The front ring 41 and the rear ring 42 are respectively provided with a front ring small hole 411 and a rear ring small hole 412, the front ring small hole 411 is communicated to the mounting groove 40, and the rear ring small hole 412 is communicated to the mounting groove 40. The front ring small hole 411 and the rear ring small hole 412 are located on the front and rear sides of the seal ring 3.

The front ring of apertures 411 is circumferentially distributed on the front ring 41 and the rear ring of apertures 412 is circumferentially distributed on the rear ring 42.

The combined piston also has the function of preventing expansion to protect a sealing element, in the process of pulling back the follow-up oil cylinder, when the combined piston 4 moves from the small-diameter cavity of the oil cylinder to the large-diameter cavity of the oil cylinder (expanding cavity), the combined piston 4 needs to pass through the transition position of the oil cylinder, namely, the caliber of the oil cylinder at the position can be gradually enlarged, a larger hydraulic impact can be generated at this moment, the impact can be applied to the sealing guide ring 43, the guide belt is enabled to receive a force expanding outwards, so that the sealing guide ring 43 is easily extruded and deformed to be cut off, the combined piston 4 can well solve the problem, when the impact is received, the sealing guide ring 43 is obliquely deformed towards one side, but due to the effect of the limiting shoulder 401, the effect of protecting the sealing guide ring 43 can be effectively played, and the safety performance of the use of the oil cylinder is enhanced.

Example 2

The same as embodiment 1, except that there are two limit shoulders 401, two limit shoulders 401 are respectively provided on the front ring 41 and the rear ring 42, one side of the limit shoulder 401 facing the mounting groove 40 is defined as an inner annular surface, one end of the limit shoulder 401 connected to the front ring 41 or the rear ring 42 is defined as a fixed end, and the other end is an extended end, and the inner annular surface of the limit shoulder 401 is obliquely provided so that the thickness of the extended end of the limit shoulder 401 is gradually reduced.

Example 3

The same as embodiment 1, except that it further comprises a piston rod seal ring 5, and the piston rod seal ring 5 is installed between the end of the piston rod 2 and the combined piston 4.

Example 4

The same as in embodiment 1, except that the front ring 41 is an annular body having a rectangular cross section, the rear ring 42 is an annular body having an L-shaped cross section, and the front ring 41 and the rear ring 42 have the same thickness.

Claims (6)

1. The utility model provides a follow-up hydro-cylinder with combination formula piston, includes hydro-cylinder body (1) and installs piston rod (2) in hydro-cylinder body (1), install on piston rod (2) with hydro-cylinder body (1) inner wall sealing's sealing washer (3), its characterized in that: still include combination formula piston (4), install on combination formula piston (4) sealing washer (3), combination formula piston (4) are including establishing preceding circle (41) and back circle (42) at piston rod (2) tip, preceding circle (41) and back circle (42) coaxial setting form annular mounting groove (40) on the outside anchor ring jointly, the notch of mounting groove (40) sets up outwards, the notch department of mounting groove (40) is equipped with spacing circular bead (401), still include sealed guide ring (43), sealed guide ring (43) and sealing washer (3) are all placed in mounting groove (40), sealed guide ring (43) are the ring body of T type for the cross-section, sealed guide ring (43) are located the outside of sealing washer (3) and compress tightly sealing washer (3) in mounting groove (40) with spacing circular bead (401) cooperation.

2. The slave cylinder equipped with the combined piston as claimed in claim 1, wherein: spacing circular bead (401) have two, two spacing circular bead (401) set up respectively on preceding circle (41) and back circle (42), the one side towards mounting groove (40) in spacing circular bead (401) is defined as interior anchor ring, the one end that spacing circular bead (401) and preceding circle (41) or back circle (42) are connected is defined as the stiff end, the other end is for stretching out the end, the interior anchor ring slope of spacing circular bead (401) sets up and makes the end thickness that stretches out of spacing circular bead (401) reduce gradually.

3. The slave cylinder equipped with the combined piston as claimed in claim 1, wherein: the front ring (41) and the rear ring (42) are respectively provided with a front ring small hole (411) and a rear ring small hole (412), the front ring small hole (411) is communicated into the mounting groove (40), and the rear ring small hole (412) is communicated into the mounting groove (40).

4. The slave cylinder equipped with the combined piston as claimed in claim 3, wherein: the front circle of small holes (411) are circumferentially distributed on the front circle (41), and the rear circle of small holes (412) are circumferentially distributed on the rear circle (42).

5. The slave cylinder equipped with the combined piston as claimed in claim 1, wherein: the piston rod sealing ring (5) is further included, and the piston rod sealing ring (5) is installed between the end of the piston rod (2) and the combined piston (4).

6. The slave cylinder equipped with the combined piston as claimed in claim 1, wherein: the front ring (41) is an annular body with a rectangular cross section, the rear ring (42) is an annular body with an L-shaped cross section, and the thicknesses of the front ring (41) and the rear ring (42) are the same.

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