CN211288311U

CN211288311U - Porous throttling type oil cylinder buffering and adjusting device

Info

Publication number: CN211288311U
Application number: CN201922427138.0U
Authority: CN
Inventors: 郭铁虎; 党建军; 郭鑫; 赵永亮; 籍继川; 刘格生; 马文清
Original assignee: Shanxi Fangsheng Hydraulic Mechanical And Electrical Equipment Co ltd
Current assignee: Shanxi Fangsheng Hydraulic Mechanical And Electrical Equipment Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-08-18
Anticipated expiration: 2029-12-30

Abstract

The utility model relates to a fluid drive specifically is a porous throttle formula hydro-cylinder buffering adjusting device with throttle buffer. The cylinder head flange is screwed at the tail end of the cylinder barrel, the front end and the rear end of the mounting body are fixedly connected with the cylinder head flange and the oil port flange respectively through bolts, a piston connected with a piston rod is arranged in the cylinder barrel, and a rodless cavity in the cylinder barrel is communicated with an inner cavity of the mounting body. The utility model has the advantages of reasonable design reliably, reduced the processing cost by a wide margin, on-the-spot can dismantle a throttle section of thick bamboo fast, according to load and the downthehole spiral shell's of twisting quantity of using the operating mode adjustment throttle, realize conveniently mediating the function of buffering, job stabilization is long-term, is particularly useful for the buffering adjustment operating mode of the large-traffic operating mode of heavy load, and throttle pressure pulsation is little, and the linear level and smooth effectual of buffering.

Description

Porous throttling type oil cylinder buffering and adjusting device

Technical Field

The utility model relates to a fluid drive specifically is a porous throttle formula hydro-cylinder buffering adjusting device with throttle buffer.

Background

The hydro-cylinder is the essential executive component among hydraulic pressure and the mechanical equipment, carries out reciprocating motion through hydro-cylinder drive mechanical parts and realizes certain equipment function, and most mechanical equipment all requires the hydro-cylinder can slowly stop when moving to the stroke end, prevents to cause the impact to mechanical equipment, and this function is realized through the buffering adjusting device of hydro-cylinder. The existing oil cylinder buffer device generally adopts two modes, one mode is that a fixed or floating buffer sleeve is arranged on an oil cylinder piston rod and is matched with a groove in a cylinder bottom or a cylinder head to realize the buffer of the tail end of an oil cylinder, and the method has higher requirements on the processing precision and the material of parts, can only realize the fixed buffer effect and cannot carry out field adjustment. The other is that the cylinder head or the cylinder bottom is provided with a plug hole, and a buffer adjusting screw rod is arranged in the plug hole to realize buffering, so that the on-site adjustment is more convenient, but the defects are that the processing precision of the plug hole and the adjusting screw rod, especially the requirement on concentricity is high, the manufacturing cost is high, and the defects of easy leakage and incapability of long-term stable operation exist in practical application.

Disclosure of Invention

The utility model discloses a solve unable on-the-spot regulation of buffering effect, add that current hydro-cylinder buffer exists

The porous throttling type oil cylinder buffer adjusting device has the advantages of being difficult to operate and incapable of long-acting and stable operation.

The utility model discloses an adopt following technical scheme to realize:

a porous throttling type oil cylinder buffering and adjusting device comprises a cylinder head flange, an installation body and an oil port flange which are sequentially arranged at the tail end of a cylinder barrel, wherein the cylinder head flange is screwed at the tail end of the cylinder barrel, the front end and the rear end of the installation body are fixedly connected with the cylinder head flange and the oil port flange respectively through bolts, a piston connected with a piston rod is arranged in the cylinder barrel, and a rodless cavity in the cylinder barrel is communicated with an inner cavity of the installation body.

The inner cavity of the mounting body is provided with a coaxial step-shaped round hole cavity which is sequentially provided with a positioning spigot D, a cavity A for moving the buffer sleeve to work, a cavity B for spring to work and a throttling cylinder shaft cavity E; the positioning spigot D inner diameter R is larger than the A cavity inner diameter R1, the A cavity inner diameter R1 is larger than the B cavity inner diameter R2, the B cavity inner diameter R2 is larger than the inner diameter of a throttle cylinder shaft cavity R3, a throttle cylinder fixing hole F for fixing a throttle cylinder step shaft is also arranged adjacent to the throttle cylinder shaft cavity, the throttle cylinder fixing hole inner diameter R4 is larger than the throttle cylinder shaft cavity inner diameter R3, the outer end face of a throttle cylinder is fixed by an oil port flange, and the mounting body 4 positioning spigot is in butt joint positioning with the cylinder barrel 1.

Furthermore, the throttling cylinder is a stepped shaft with an axial through inner hole, a plurality of throttling small holes with internal threads are processed on the side wall of the thin shaft end, the throttling small holes are communicated with the inner cavity and the outer cavity, screw plugs can be installed or not installed in the throttling small holes, the thick shaft end is embedded into a groove of an oil port flange and is tightly pressed on a throttling cylinder fixing hole at the end of the installation body through the oil port flange, the outer circle of the thin shaft of the throttling cylinder is installed in the throttling cylinder shaft cavity of the installation body, and an O-shaped ring is further arranged on the outer circle of the thick shaft of the.

Further, A intracavity hole diameter R1 is greater than piston work intracavity hole diameter for removing the cushion collar work, the A chamber is adjacent with the piston work chamber, the interior surface of A chamber is the smooth processing of rule, remove cushion collar hole axle cooperation and install in the A intracavity, it is the step shaft form to remove the cushion collar excircle, the big excircle external diameter of step shaft is provided with the glary circle and seals and with A intracavity footpath R1 clearance fit, little excircle diameter is less than piston work intracavity hole diameter, it runs through the hole to be provided with the rule coaxial with big excircle in the removal cushion collar.

Furthermore, a spring is arranged in the cavity B of the mounting body, and the inner hole of the spring is larger than the outer diameter of the thin shaft of the throttling cylinder.

The fine shaft of the throttling cylinder penetrates through the cavity B and the cavity A, the outer diameter of the fine shaft of the throttling cylinder is in clearance fit with the inner hole of the movable buffer sleeve, and the inner hole of the movable buffer sleeve can completely cover or completely expose the throttling small hole of the fine shaft of the throttling cylinder when the movable buffer sleeve axially reciprocates.

A plurality of oil ducts are axially and uniformly distributed in the movable buffer sleeve, the oil ducts are communicated with the rodless cavity of the cylinder barrel and the cavity B of the mounting body, one-way valves are arranged in the oil ducts, and when the rodless cavity is high in pressure and the cavity B is low in pressure, the one-way valves are opened; when the cavity B is high-pressure and the rodless cavity is low-pressure, the check valve group is closed.

The throttling cylinder can be opened at a use site, the oil port flange is detached to perform buffering adjustment, the total flow area of the throttling small hole is reduced or increased by increasing or reducing the number of throttling small hole screwing plugs, and the buffering effect is convenient to adjust.

The plug 10 may also be a plug provided with a damping orifice.

The plurality of small throttling holes on the side wall of the thin shaft end of the throttling cylinder are distributed gradually, and the quantity is transited from the multi-hole distribution at the beginning end of the buffer to the small-hole distribution at the ending end of the buffer.

The gradually distributed buffering throttling small holes and the damping plugs or the non-damping plugs can be freely and flexibly matched and arranged to reflect different buffering effects, and the buffering duration time can be more accurately adjusted and controlled.

The utility model has the advantages of reasonable design reliably, reduced the processing cost by a wide margin, on-the-spot can dismantle a throttle section of thick bamboo fast, according to load and the downthehole spiral shell's of twisting quantity of using the operating mode adjustment throttle, realize conveniently mediating the function of buffering, job stabilization is long-term, is particularly useful for the buffering adjustment operating mode of the large-traffic operating mode of heavy load, and throttle pressure pulsation is little, and the linear level and smooth effectual of buffering.

Drawings

Fig. 1 is a schematic structural diagram of the present invention, namely, the movable buffer sleeve is in a retracted state;

FIG. 2 is a schematic structural diagram of the present invention, showing the movable cushion collar in an extended state;

fig. 3 is a perspective front view of the throttle cylinder of the present invention;

FIG. 4 is an expanded view of the throttle body of the throttle cylinder of the present invention;

fig. 5 is a sectional view of the mounting body of the present invention.

In the figure: the hydraulic cylinder comprises a cylinder barrel 1, a piston 2, a cylinder head flange 3, an installation body 4, a one-way valve 5, a movable buffer sleeve 6, a spring 7, a throttling barrel 8, an oil port flange 9, a plug 10, an O-shaped ring 11 and a Glare ring 12.

Detailed Description

Referring to fig. 1 and 5, the multi-hole throttling type oil cylinder buffering and adjusting device comprises a cylinder head flange 3, an installation body 4, a movable buffering sleeve 6 and an oil port flange 9 which are sequentially arranged at the tail end of a cylinder barrel 1, wherein the cylinder head flange 3 is screwed at the tail end of the cylinder barrel 1, the front end and the rear end of the installation body 4 are fixedly connected with the cylinder head flange 3 and the oil port flange 9 through bolts respectively, a piston 2 connected with a piston rod is arranged in the cylinder barrel 1, and a rodless cavity in the cylinder barrel 1 is communicated with an inner cavity of the installation body. A coaxial step-shaped round hole cavity is processed in the inner cavity of the mounting body 4, and the positioning spigot D, the cavity A for moving the buffer sleeve 6 to work, the cavity B for moving the spring 7 to work and the shaft cavity E of the throttling cylinder 8 are sequentially arranged; the positioning spigot D inner diameter R is larger than an A cavity inner diameter R1, the A cavity inner diameter R1 is larger than a B cavity inner diameter R2, the B cavity inner diameter R2 is larger than a throttling cylinder 8 shaft cavity R3 inner diameter, the throttling cylinder 8 shaft cavity is adjacent to a throttling cylinder 8 fixing hole F used for fixing a throttling cylinder 8 step shaft, the throttling cylinder 8 fixing hole inner diameter R4 is larger than a throttling cylinder 8 shaft cavity inner diameter R3, an oil port flange 9 is used for fixing the outer end face of the throttling cylinder 8, and the mounting body 4 is in butt joint positioning with the cylinder barrel 1.

As shown in fig. 1 and 3, the throttling cylinder 8 is a stepped shaft with an axial through inner hole, a plurality of throttling small holes with internal threads are processed on the side wall of the thin shaft end, the throttling small holes are communicated with an inner cavity and an outer cavity, a plug 10 can be installed or not installed in each throttling small hole, the thick shaft end is embedded into a groove of an oil port flange 9 and is tightly pressed on a throttling cylinder 8 fixing hole at the outer end of the installation body 4 through the oil port flange, the outer circle of the thin shaft of the throttling cylinder 8 is installed in the axial cavity of the throttling cylinder 8 of the installation body 4, and an O-shaped ring 11 is further arranged on the outer circle.

As shown in fig. 1, fig. 5, a cavity inner diameter R1 in the A cavity for moving the work of cushion collar 6 is greater than the cavity inner diameter in the work of piston 2, the cavity A is adjacent to the work cavity of piston 2, the inner surface of the cavity A is processed smoothly regularly, move the cooperation of 6 hole shafts of cushion collar and install in the cavity A, it is the stepped shaft form to move 6 excircles of cushion collar, the big excircle external diameter of stepped shaft is provided with the glary circle and seals and with the cavity inner diameter R1 clearance fit of the A cavity, little excircle diameter is less than the cavity inner diameter in the work of piston 2, it runs through the hole to be provided with the rule coaxial with big excircle in the removal cushion collar 6, set up spring 7 in the cavity B of installation body.

As shown in the figure 1 and the figure 2, the thin shaft of the throttling cylinder 8 penetrates through the cavity B and the cavity A, the outer diameter of the thin shaft of the throttling cylinder 8 is in clearance fit with the inner hole of the movable buffer sleeve 6, and when the movable buffer sleeve 6 axially reciprocates, the inner hole of the movable buffer sleeve 6 can completely cover or completely expose the throttling small hole of the thin shaft of the throttling cylinder 8.

As shown in fig. 1, a plurality of oil passages are uniformly distributed in the axial direction of the movable buffer sleeve 6, the oil passages are communicated with the rodless cavity of the cylinder barrel 1 and the cavity B of the mounting body 4, one-way valves 5 are arranged in the oil passages, and when the rodless cavity is high in pressure and the cavity B is low in pressure, the one-way valves 5 are opened; when the cavity B is high-pressure and the rodless cavity is low-pressure, the check valve 5 is closed. The throttling cylinder 8 can be used for buffering adjustment by opening the oil port flange 9 and detaching the throttling cylinder 8 on the use site, and the total flow area of the small throttling holes is reduced or increased by increasing or reducing the number of the small throttling hole screwing plugs 10, so that the buffering effect is convenient to adjust. The plug 10 may also be a plug provided with a damping orifice.

3-4, the quantity of the small throttling holes distributed on the side wall of the thin shaft end of the throttling cylinder is transited from C to a plurality of holes at the beginning end of the buffering to a plurality of holes at the ending end of the buffering.

The working process is as follows:

as shown in fig. 1 and fig. 2, when the oil cylinder is required to extend, high-pressure oil enters a cavity in the center of the throttling cylinder 8 through the oil port flange 9, and then acts on a rodless cavity at the rear end of the piston 2 to push the piston 2 to advance, meanwhile, the movable buffer sleeve 6 moves towards the rod cavity of the piston 2 under the action of the spring 7, the thinner end of the movable buffer sleeve extends into the cylinder barrel 1 until the annular surface contacts with the end surface of the cylinder barrel 1, the movable buffer sleeve 6 moves forwards, and the rodless cavity high-pressure oil behind the piston 2 opens the check valve 5 in the movable buffer sleeve 6 to rapidly enter the cavity formed by the movable buffer sleeve 6 and the mounting body 4. In the retraction process of the oil cylinder, after the rear end face of the piston 2 is in contact with the movable buffer sleeve 6, the oil cylinder starts to enter a buffer stroke, the movable buffer sleeve 6 moves towards the retraction direction of the oil cylinder under the action force of the piston 2, oil in the movable buffer sleeve 6 and an oil cavity of the installation body 4 is compressed and becomes a high-pressure state, the check valve 5 in the movable buffer sleeve 6 is sealed by the high-pressure oil, the high-pressure oil is forced to be discharged only through a throttling small hole in the pipe wall of the throttling cylinder 8, the throttling small holes exposed on the throttling cylinder 8 are gradually reduced along with the gradual movement of the movable buffer sleeve 6 towards the retraction direction of the oil cylinder, the overflowing area is gradually reduced, the buffer effect is gradually enhanced along with the gradual reduction, the movable buffer sleeve 6 is completely retracted to be attached to an annular surface in the installation body, the piston 2 and the movable.

Claims

1. A porous throttling type oil cylinder buffering and adjusting device comprises: the removal cushion collar (6), throttle cylinder (8), spring (7), piston (2) that set up in cylinder (1) that the coaxial line set up, its characterized in that: the device also comprises an installation body (4) with an inner cavity provided with a coaxial step-shaped round hole cavity, wherein the step-shaped round hole cavity is sequentially provided with a positioning spigot D, an A cavity used for moving the buffer sleeve (6) to work, a B cavity used for moving the spring (7) to work and an axial cavity E of the throttling cylinder (8); the inner diameter R of the positioning spigot D is larger than the inner diameter R1 of the cavity A, the inner diameter R1 of the cavity A is larger than the inner diameter R2 of the cavity B, the inner diameter R2 of the cavity B is larger than the inner diameter R3 of the shaft cavity of the throttling cylinder (8), the shaft cavity of the throttling cylinder (8) is adjacent to the throttling cylinder (8) and is also provided with a throttling cylinder (8) fixing hole F for fixing a step shaft of the throttling cylinder (8), the inner diameter R4 of the throttling cylinder (8) fixing hole is larger than the inner diameter R3 of the shaft cavity of the throttling cylinder (8), an oil port flange (9) is used for fixing the outer end face of the throttling cylinder (8), the positioning spigot of the mounting body (4) is in butt joint positioning with the cylinder barrel (1), the throttling cylinder (8) is a step shaft with an axial through inner hole, the thick shaft end is embedded into a groove of the oil port flange (9) and is tightly pressed on the throttling cylinder (8) fixing hole at the outer end face of the mounting body (4) through the oil port flange, the outer circle of, a hole shaft of the movable buffer sleeve (6) is arranged in the cavity A in a matching mode, the excircle of the movable buffer sleeve (6) is in a stepped shaft mode, the outer diameter of the large excircle of the stepped shaft is provided with a GREEN seal and is in clearance fit with the inner diameter R1 of the cavity A, the diameter of the small excircle is smaller than the diameter of the hole in the working cavity of the piston (2), a regular penetrating inner hole coaxial with the large excircle is arranged in the movable buffer sleeve (6), a spring (7) is arranged in the cavity B of the installation body (4), and the inner hole of the spring (7) is larger than the outer diameter of the; the thin shaft of the throttling cylinder (8) penetrates through the cavity B and the cavity A, and the outer diameter of the thin shaft of the throttling cylinder (8) is in clearance fit with the inner hole of the movable buffer sleeve (6).

2. The multi-hole throttling type oil cylinder buffering and adjusting device as claimed in claim 1, wherein: the movable buffer sleeve (6) is axially and uniformly provided with oil ducts, the oil ducts are communicated with two end faces, and one-way valves are arranged in the oil ducts.

3. The multi-hole throttling type oil cylinder buffering and adjusting device as claimed in claim 1, wherein: the small throttling holes distributed on the side wall of the thin shaft end of the throttling cylinder (8) are in transition from a plurality of holes at the beginning end of the buffering to a plurality of holes at the ending end of the buffering.

4. The multi-hole throttling type oil cylinder buffering and adjusting device as claimed in claim 3, characterized in that: the throttling small hole is a small hole with internal threads.

5. The multi-hole throttling type oil cylinder buffering and adjusting device as claimed in claim 4, wherein: the plug is screwed on the small throttling hole.

6. The multi-hole throttling type oil cylinder buffering and adjusting device as claimed in claim 4, wherein: and a plug with damping is screwed on the throttling small hole.

7. The multi-hole throttling type oil cylinder buffering and adjusting device as claimed in claim 4, wherein: and a plug with damping and a plug are screwed on the throttling small hole.