CN216382052U - Spring self-resetting oil cylinder - Google Patents

Spring self-resetting oil cylinder Download PDF

Info

Publication number
CN216382052U
CN216382052U CN202122594931.7U CN202122594931U CN216382052U CN 216382052 U CN216382052 U CN 216382052U CN 202122594931 U CN202122594931 U CN 202122594931U CN 216382052 U CN216382052 U CN 216382052U
Authority
CN
China
Prior art keywords
spring
piston rod
cylinder
oil cylinder
oil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202122594931.7U
Other languages
Chinese (zh)
Inventor
张邦柱
唐磊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Luzhou Synthetic Hydraulic Parts Co ltd
Original Assignee
Luzhou Synthetic Hydraulic Parts Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Luzhou Synthetic Hydraulic Parts Co ltd filed Critical Luzhou Synthetic Hydraulic Parts Co ltd
Priority to CN202122594931.7U priority Critical patent/CN216382052U/en
Application granted granted Critical
Publication of CN216382052U publication Critical patent/CN216382052U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Actuator (AREA)

Abstract

The utility model discloses a spring self-resetting oil cylinder, relates to the field of hydraulic oil cylinders, and is mainly used for solving the problem that the traditional single-acting piston type oil cylinder needs to realize reciprocating motion by means of dead weight or outer wall load and limits the use condition of the oil cylinder. Its main structure includes: the cylinder bottom and the piston rod are connected by a spring. According to the spring self-resetting oil cylinder provided by the utility model, the return stroke of the hydraulic rod depends on the stretching force received by the spring after deformation, and the return stroke is completed without depending on the self weight of the piston rod or the load of the outer wall, so that the limitation of application conditions is reduced, and the application range is expanded.

Description

Spring self-resetting oil cylinder
Technical Field
The utility model belongs to the field of hydraulic oil cylinders, and particularly relates to a spring self-resetting oil cylinder.
Background
The hydraulic cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has simple structure and reliable operation. 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 hydraulic oil cylinder has various structural forms, and can be divided into a piston type, a plunger type, a multi-stage telescopic type, a rack and pinion type and the like. The piston type is classified into a single-acting type and a double-acting type. In the single-acting hydraulic cylinder, pressure oil only supplies one cavity of the hydraulic cylinder, the piston realizes unidirectional movement by hydraulic pressure, and the movement in the opposite direction is realized by external force such as dead weight or external load; the movement of the double-acting hydraulic cylinder piston in two directions is completed by the alternate oil feeding of the two cavities and the action of hydraulic pressure. The plunger type is a single-acting hydraulic cylinder, the movement in one direction can be realized only by hydraulic pressure, the return stroke of the plunger needs to depend on other external force or the dead weight of the plunger, and the plunger only depends on the cylinder sleeve to support but not contact with the cylinder sleeve, so the cylinder sleeve is easy to process, and is suitable for being used as a long-stroke hydraulic cylinder, but the weight of the plunger is often larger, and the plunger is easy to droop due to the dead weight when being horizontally placed, so that the sealing element and the guide are subjected to unilateral abrasion. The telescopic cylinder has two or more pistons, the order of extension of the pistons in the telescopic cylinder being from large to small, and the order of idle retraction being generally from small to large. The telescopic hydraulic cylinder can realize longer stroke, has shorter length during retraction and more compact structure, but has complex structure, complex manufacturing process and higher manufacturing cost.
The piston type oil cylinder has a relatively simple structure and a stable stroke, and is the most commonly applied hydraulic oil cylinder. The double-acting piston type oil cylinder needs two cavities to alternately feed oil and return oil, and the single-acting piston type oil cylinder only needs one cavity to supply oil, so that the double-acting piston type oil cylinder is simpler in structure and lower in manufacturing cost compared with the double-acting piston type oil cylinder, but hydraulic pressure can only realize unidirectional movement, and the movement in the opposite direction needs external force assistance, so that the double-acting piston type oil cylinder tastes depending on dead weight or outer wall load, but the use object of the oil cylinder is limited, and the use range is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a spring self-resetting oil cylinder, which aims to solve the problem that the traditional single-acting piston type oil cylinder needs to realize reciprocating motion by means of dead weight or outer wall load and limits the use condition of the oil cylinder.
In order to realize the purpose of the utility model, the technical scheme is as follows: the piston rod is internally provided with a blind hole facing the cylinder bottom, the spring is arranged in the blind hole, one end of the spring is connected with the cylinder bottom, and the other end of the spring is connected with the hole bottom of the piston rod. The spring is arranged in the blind hole, the mounting position of the spring is limited, and the spring is prevented from deviating; the piston rod moves towards the extending direction under the action of hydraulic oil, and the spring is stretched to generate elastic deformation; when the extending stroke is completed and the piston rod needs to move back, the hydraulic oil does not act, the spring elasticity enables the spring to restore the original state, and the connected piston rod is driven to complete the stroke of the back movement.
Further, the cylinder bottom at two ends of the spring and/or the hole bottom of the piston rod are/is provided with a mounting block for mounting the spring. The installation piece is convenient to be fixed the spring, further restricts spring mounting position, prevents that the spring from taking place the skew at the recess internal position.
Further, the mounting block is in threaded connection with the cylinder bottom and/or the bottom of the piston rod hole. Threaded connection can be dismantled, makes things convenient for the dismouting, changes the maintenance to the spring.
Further, the blind holes are deep holes. The springs are completely arranged in the deep grooves in the initial state, so that the springs are prevented from occupying the space between the cylinder bottom and the piston rod, and the movement stroke of the piston rod is reduced; the piston rod becomes a hollow rod due to the existence of the deep groove, the dead weight of the piston rod is reduced, the energy consumed by overcoming the dead weight is reduced, and the energy loss is reduced.
Furthermore, the inner diameter of the blind hole is matched with the outer diameter of the spring. The blind hole wall provides direction and spacing for the spring, prevents that the spring from having radial displacement at the during operation, and the guide spring axial motion.
Further, the piston rod and the piston are of an integrated structure. The processing of the connecting part of the piston rod and the piston is omitted, the processing difficulty is reduced, the connecting gap between the piston and the piston rod is reduced, and the oil leakage risk is reduced.
Furthermore, the piston rod is made of alloy steel. The deep hole makes the piston rod become hollow rod, and piston rod weight reduces, and intensity reduces, and the intensity of alloy steel is better, prevents to cause intensity not enough because the hydraulic stem is hollow.
Further, the piston rod is made of 27 SiMn. The material is also called 27SiMn seamless steel tube, has high strength and good wear resistance, and can well meet the use requirement when being used on a piston rod.
The utility model has the beneficial effects that:
the cylinder bottom and the piston rod are connected by the spring, and the return stroke of the hydraulic rod depends on the stretching force received by the spring after deformation, so that the return stroke is completed without depending on the self weight of the piston rod or the load of the outer wall, the limitation of application conditions is reduced, and the application range is expanded;
the mounting block is detachably connected with the cylinder bottom and the piston rod through threads, so that the mounting block is convenient to disassemble and assemble, and is convenient for daily maintenance or repair of a forehead spring in the oil cylinder;
the piston rod is a hollow rod, so that the dead weight of the piston rod is reduced, the energy consumed by overcoming the dead weight is reduced, and the energy loss is reduced.
Drawings
FIG. 1: the utility model has a structure schematic diagram.
Reference numbers and corresponding part names in the drawings:
1-cylinder bottom, 2-installation block, 3-piston, 4-cylinder, 5-piston rod, 6-spring, 7-oil port.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 shows that the spring self-resetting oil cylinder provided by the utility model comprises a cylinder bottom 1, a piston 3, a piston rod 5 and an oil port 7, wherein a deep hole is formed in the end surface, close to the cylinder bottom 1, of the piston rod 5, a spring 6 is arranged in the deep hole and is used for connecting the cylinder bottom 1 with the piston rod 5, and the spring is completely arranged in the deep hole of the piston rod 5, so that the movement stroke of the piston rod 5 cannot be reduced because the spring occupies the space between the cylinder bottom 1 and the piston rod 5, and the piston rod 5 is a hollow rod due to the existence of the deep hole, the dead weight of the piston rod 5 is reduced, the energy consumed by overcoming the dead weight is reduced, and the energy loss is reduced. The bottom of the cylinder bottom 1 and the bottom of the hole of the piston rod 5 are both provided with the mounting blocks 2, the two ends of the spring 6 are mounted on the mounting blocks 2, and the mounting blocks 2 are detachably connected with the bottom of the cylinder bottom 1 and the bottom of the hole of the piston rod 5 through bolts, so that the built-in spring is conveniently maintained and daily maintained. The inner diameter of the deep hole on the piston rod 5 is matched with the outer diameter of the spring 6, so that the stroke of the spring 6 can be guided when the spring 6 stretches, and the radial displacement of the spring 6 is prevented. The piston rod 5 and the piston 3 are arranged into a whole, so that the processing of the connecting part of the piston rod 5 and the piston 3 is omitted, the processing difficulty is reduced, the connecting gap between the piston 3 and the piston rod 5 is reduced, and the oil leakage risk is reduced. The oil port 7 is used for oil inlet and oil return and is arranged at a position close to the cylinder bottom 1.
When the hydraulic cylinder is used, the piston rod 5 is in an extending stage, the oil port 7 is filled with oil, the piston 3 moves towards the outlet direction of the cylinder barrel 4 under the action of oil pressure to drive the integrated piston rod 5 to move in the same direction, the piston rod 5 extends out, the spring 6 arranged in the deep hole of the piston rod 5 is stretched to generate deformation, the piston rod 5 is pulled by the spring 6, the direction points to the cylinder bottom 1, the piston rod 5 is also subjected to the oil pressure of hydraulic oil, the direction points to the outlet direction of the cylinder barrel 4, and the oil pressure of the hydraulic oil is greater than the elastic force of the spring 6 in the extending process of the piston rod 5; in the retraction stage of the piston rod 8, the oil port 7 returns oil, the piston 3 is not subjected to the oil pressure of hydraulic oil any more, and the piston rod 5 is not driven to move towards the outlet of the cylinder barrel 4 any more, the piston rod 5 moves towards the cylinder bottom 1 under the action of the elastic force of the spring 6, the piston rod 5 retracts, and one stroke is completed. When 7 oil intakes of hydraulic fluid port, the oil pressure of hydraulic oil is greater than the pulling force of spring 6, and piston rod 5 stretches out, when 7 oil returns, piston rod 5 receives the pulling force of spring 6 and gets back to initial position, so reciprocal.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The spring self-resetting oil cylinder is characterized in that a blind hole facing to a cylinder bottom is formed in a piston rod (5), a spring (6) is installed in the blind hole, one end of the spring is connected with the cylinder bottom (1), and the other end of the spring is connected with the hole bottom of the piston rod (5).
2. A spring self-resetting cylinder according to claim 1, characterized in that the bottom (1) of the cylinder and/or the bottom of the piston rod (5) at both ends of the spring (6) are provided with mounting blocks (2) for mounting the spring.
3. A spring self-resetting cylinder according to claim 2, characterized in that the mounting block (2) is screwed to the cylinder bottom (1) and/or the bore bottom of the piston rod (5).
4. The spring self-resetting cylinder according to claim 1, wherein the blind hole is a deep hole.
5. A spring self-resetting cylinder according to claim 4, characterized in that the inner diameter of the blind hole is adapted to the outer diameter of the spring (6).
6. A spring self-resetting cylinder according to any one of claims 1 to 5, characterized in that the piston rod (5) and the piston (3) are of an integral structure.
7. A spring self-resetting cylinder according to claim 4, characterized in that the piston rod (5) is made of alloy steel.
8. A spring self-resetting cylinder according to claim 7, characterized in that the piston rod (5) is made of 27 SiMn.
CN202122594931.7U 2021-10-27 2021-10-27 Spring self-resetting oil cylinder Active CN216382052U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202122594931.7U CN216382052U (en) 2021-10-27 2021-10-27 Spring self-resetting oil cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202122594931.7U CN216382052U (en) 2021-10-27 2021-10-27 Spring self-resetting oil cylinder

Publications (1)

Publication Number Publication Date
CN216382052U true CN216382052U (en) 2022-04-26

Family

ID=81248161

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202122594931.7U Active CN216382052U (en) 2021-10-27 2021-10-27 Spring self-resetting oil cylinder

Country Status (1)

Country Link
CN (1) CN216382052U (en)

Similar Documents

Publication Publication Date Title
CN205578403U (en) Butter type hydraulic oil cylinder
CN216382052U (en) Spring self-resetting oil cylinder
CN204512056U (en) A kind of rotary drilling rig hydraulic jack
CN103867524B (en) A kind of double-action two-stage hydraulic cylinder
CN202031913U (en) Internally designed oil pipe of hydraulic multi-stage cylinder piston rod
CN210087717U (en) Telescopic rotary hydraulic cylinder
CN211623864U (en) Plunger piston composite double-acting oil cylinder
CN212959357U (en) Two-stage hydraulic cylinder
CN211231094U (en) Double-piston rod type hydraulic oil cylinder
CN102889262B (en) Combined type hydraulic cylinder with floating cylinder barrel
CN212717757U (en) Telescopic multistage viscous fluid damper
CN2821245Y (en) Serial conjoined oil cylinder
CN111577701B (en) Hydraulic actuator cylinder with stroke starting end buffering function
CN219282137U (en) Hydraulic cylinder guide structure
CN208764019U (en) A kind of interlayer makees the two-action multi-stage cylinder of oil supply gallery
CN218971542U (en) Stroke-adjustable oil hydraulic cylinder
CN209800421U (en) multistage hydraulic cylinder
CN107829898A (en) A kind of double pumping end hydraulic piston pump
CN215719942U (en) Floating buffer hydraulic oil cylinder for crane
CN221033434U (en) Guiding plunger type hydraulic cylinder
CN219911354U (en) Piston
CN212389603U (en) Hydraulic cylinder capable of realizing rapid and slow action sequence
CN205533523U (en) Two effect pneumatic cylinders of single pole
CN211525010U (en) Double-cavity plunger pump
CN113090608B (en) Hydraulic jacking oil cylinder

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant