阅读说明：本技术 带有缓冲机构的油缸装置及缓冲方法 (Oil cylinder device with buffer mechanism and buffer method ) 是由 赵幼兰 郭红颖 于 2019-09-26 设计创作，主要内容包括：本发明公开了一种带有缓冲机构的油缸装置及缓冲方法,其中油缸装置包括具有一腔体的缸筒、位于缸筒内的活塞杆、活塞、油口部和缓冲部,所述活塞将缸筒的腔体分隔成两个相对的第一密封空间和第二密封空间,所述油口部包括设置在所述缸筒侧壁上的至少一个贯通孔；所述缓冲部包括开设在所述活塞侧壁上且能够与所述第一密封空间连通的槽体、设置在所述槽体内且与所述缸筒内侧壁抵接的缓冲环,所述缓冲环上设置有一能够分别连通所述贯通孔和第一密封空间的缺口。本发明至少包括以下优点：通过缓冲环缺口、槽体、贯通孔之间配合形成的油路,控制液压油在单位时间内流出和流入缸筒内的流量控制,实现对活塞杆的缓冲动作,结构巧妙,配合简单。(The invention discloses an oil cylinder device with a buffer mechanism and a buffer method, wherein the oil cylinder device comprises a cylinder barrel with a cavity, a piston rod positioned in the cylinder barrel, a piston, an oil port part and a buffer part, wherein the piston divides the cavity of the cylinder barrel into a first sealed space and a second sealed space which are opposite, and the oil port part comprises at least one through hole arranged on the side wall of the cylinder barrel; the buffering portion comprises a groove body and a buffering ring, the groove body is arranged on the side wall of the piston and can be communicated with the first sealing space, the buffering ring is arranged in the groove body and abutted against the inner side wall of the cylinder barrel, and a notch is formed in the buffering ring and can be respectively communicated with the through hole and the first sealing space. The invention at least comprises the following advantages: through the oil circuit that the cooperation formed between buffer ring breach, cell body, the perforating hole, the flow control that control hydraulic oil flowed out in the unit interval and flowed into the cylinder realizes the buffering action to the piston rod, and the structure is ingenious, and the cooperation is simple.)

1. An oil cylinder device with a buffer mechanism comprises a cylinder barrel with a cavity, a piston rod positioned in the cylinder barrel and a piston fixedly connected with the piston rod, wherein the cavity of the cylinder barrel is divided into a first sealing space and a second sealing space which are opposite by the piston, and the oil cylinder device is characterized by also comprising an oil port part and a buffer part,

the oil port part comprises at least one through hole arranged on the side wall of the cylinder barrel;

the buffer part comprises a groove body which is arranged on the side wall of the piston and can be communicated with the first sealing space, and a buffer ring which is arranged in the groove body and is abutted against the inner side wall of the cylinder barrel, wherein a notch which can be respectively communicated with the through hole and the first sealing space is arranged on the buffer ring;

the oil cylinder device is provided with a first oil way state, a second oil way state and a third oil way state, and when the oil cylinder device is in the first oil way state, the through hole is communicated with the first sealing cavity through the groove body and the notch respectively; when the sealing device is in a second oil path state, the through hole is directly communicated with the first sealing cavity; when the oil way is in a third oil way state, the through hole is communicated with the first sealing cavity through the notch;

the piston rod is provided with a forward state and a backward state, and when the piston rod is in the forward state, the oil cylinder device is in a first oil path state when the buffer ring is positioned on the left side of the through hole; the oil cylinder device is in a second oil path state when the buffer ring is positioned on the right side of the through hole; when the oil cylinder device is in a retreating state, the oil cylinder device is in a second oil path state when the buffer ring is positioned on the right side of the through hole; the oil cylinder device is in a third oil path state when the buffer ring is positioned on the left side of the through hole;

the flow of the hydraulic oil flowing through the through hole in unit time is larger than the sum of the flow of the hydraulic oil flowing through the groove body and the notch.

2. The cylinder device with the cushion mechanism according to claim 1, wherein the cushion ring is made of an elastic polymer material.

3. The cylinder apparatus with a cushion mechanism according to claim 2, wherein the cushion ring is made of PDFE material.

4. The cylinder device with the damping mechanism according to claim 1, wherein there are two through holes, and the two through holes are disposed opposite to each other in the moving direction of the piston rod; the buffer parts are two and are arranged in one-to-one correspondence with the through holes.

5. The cylinder device with the cushion mechanism according to claim 4, wherein the through holes are provided respectively adjacent to both end portions of the cylinder tube.

6. The cylinder apparatus with a damping mechanism according to claim 4, wherein a straight distance between the through holes is larger than a length of the piston.

7. The cylinder device with the damping mechanism according to claim 1, wherein a seal ring is provided on a side wall of the piston, and an outer end portion of the seal ring abuts against an inner wall of the cylinder tube.

8. The cylinder device with the cushion mechanism according to claim 7, wherein an oil reservoir is formed in a side wall of the piston, and the oil reservoir is located between the cushion portion and the seal ring.

9. The cylinder apparatus with a damping mechanism according to claim 1, wherein the first seal chamber is located on a left side of the second seal chamber.

10. A buffering method for an oil cylinder device is characterized by comprising the following steps:

in the forward state:

when the buffer ring at the left end is positioned on the left side of the through hole at the left side and the buffer ring at the right end is positioned on the right side of the through hole at the left side, hydraulic oil is injected from the through hole at the left side, and the injected hydraulic oil pushes the buffer ring at the left end from the right side of the groove body to the left side of the groove body, so that the through hole at the left side is communicated with the groove body; at the moment, the buffer ring at the right end is positioned at the left side of the corresponding groove body;

the hydraulic oil is injected into the first sealing space through the groove body and the gap of the buffer ring respectively, so that the piston rod can be pushed to move rightwards, and the hydraulic oil in the second sealing space is extruded to flow out from the through hole on the right side;

when the buffer ring at the left end is positioned on the right side of the through hole at the left side and the buffer ring at the right end is positioned on the left side of the through hole at the right side, hydraulic oil is injected from the through hole at the left side, and the injected hydraulic oil pushes the buffer ring at the left end from the left side of the tank body to the right side of the tank body; at the moment, the buffer ring at the right end is positioned at the left side of the corresponding groove body;

the hydraulic oil is directly injected into the first sealed space, so that the piston rod can be pushed to move rightwards continuously, and the hydraulic oil in the second sealed space is extruded to flow out of the through hole on the right side;

when the buffer ring at the left end is positioned on the left side of the right through hole and the buffer ring at the right end is positioned on the right side of the right through hole, hydraulic oil is injected from the left through hole, and the buffer ring at the left end is positioned on the right side of the groove body corresponding to the buffer ring at the left end; the buffer ring at the right end is positioned at the left side of the corresponding groove body;

the hydraulic oil is directly injected into the first sealing space, so that the piston rod can be pushed to move rightwards continuously, and the hydraulic oil in the second sealing space is extruded to flow out from the through hole on the right side after passing through the gap of the buffer ring on the right side until the piston rod stops moving rightwards;

in the reverse state:

when the buffer ring at the right end is positioned at the right side of the right through hole and the buffer ring at the left end is positioned at the left side of the right through hole, hydraulic oil is injected from the right through hole, and the injected hydraulic oil pushes the buffer ring at the right end from the left side of the groove body to the right side of the groove body, so that the through hole at the right side is communicated with the groove body; at the moment, the buffer ring at the left end is positioned at the right side of the corresponding groove body;

the hydraulic oil is injected into the second sealing space through the groove body and the gap of the buffer ring respectively, so that the piston rod can be pushed to move leftwards, and the hydraulic oil in the first sealing space is extruded to flow out of the through hole on the left side;

when the buffer ring at the right end is positioned on the left side of the through hole at the right side and the buffer ring at the left end is positioned on the right side of the through hole at the left side, hydraulic oil is injected from the through hole at the right side, and the injected hydraulic oil pushes the buffer ring at the right end to the left side of the groove body from the right side of the groove body; at the moment, the buffer ring at the left end is positioned at the right side of the corresponding groove body;

the hydraulic oil is directly injected into the second sealed space, so that the piston rod can be pushed to move leftwards continuously, and the hydraulic oil in the first sealed space is extruded to flow out of the through hole on the left side;

when the buffer ring at the right end is positioned at the right side of the through hole at the left side and the buffer ring at the left end is positioned at the left side of the through hole at the left side, hydraulic oil is injected from the through hole at the right side, and the buffer ring at the right end is positioned at the left side of the groove body corresponding to the buffer ring at the right end; the buffer ring at the left end is positioned at the right side of the corresponding groove body;

the hydraulic oil is directly injected into the second sealing space, so that the piston rod can be pushed to move leftwards continuously, and the hydraulic oil in the first sealing space is extruded to flow out of the through hole on the left side after passing through the gap of the buffer ring on the left side until the piston rod stops moving leftwards;

and hydraulic oil is injected into the left through hole and the right through hole in sequence, so that the piston rod can be pushed to reciprocate.

Technical Field

The invention relates to the technical field of driving pieces, in particular to an oil cylinder device with a buffer mechanism and a buffer method.

Background

The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

The oil cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and makes reciprocating linear motion. During the reciprocating motion, the impact between the piston and the cylinder during the extending and retracting actions makes the piston vulnerable to damage due to the high impact of the hydraulic pressure. The existing hydraulic cylinder is provided with a buffer ring by sleeving the piston rod and a buffer gasket at the tail end of the piston rod, so that the piston rod is buffered by the impact of the buffer ring and the cylinder body and the friction between the buffer gasket and the piston rod in the movement process. The design of the buffering structure is complex, the machining precision of the piston rod and the position of the matching of the buffering gasket, the position of the matching of the buffering gasket and the cylinder body and the machining precision of the buffering ring are high, the difficulty degree in the machining process is high, the abrasion loss is serious in the long-term use process of the follow-up piston rod, the phenomenon of unobvious buffering effect can be caused, and the introduction of noise is increased.

It should be noted that the above background description is only for the sake of clarity and complete description of the technical solutions of the present invention and for the understanding of those skilled in the art. Such solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the invention.

Disclosure of Invention

In order to overcome the defects in the prior art, the embodiment of the invention provides an oil cylinder device with a buffer mechanism and a buffer method.

The embodiment of the application discloses: an oil cylinder device with a buffer mechanism comprises a cylinder barrel with a cavity, a piston rod positioned in the cylinder barrel and a piston fixedly connected with the piston rod, wherein the piston divides the cavity of the cylinder barrel into a first sealing space and a second sealing space which are opposite to each other, an oil port part and a buffer part,

the oil port part comprises at least one through hole arranged on the side wall of the cylinder barrel;

the buffer part comprises a groove body which is arranged on the side wall of the piston and can be communicated with the first sealing space, and a buffer ring which is arranged in the groove body and is abutted against the inner side wall of the cylinder barrel, wherein a notch which can be respectively communicated with the through hole and the first sealing space is arranged on the buffer ring;

the oil cylinder device is provided with a first oil way state, a second oil way state and a third oil way state, and when the oil cylinder device is in the first oil way state, the through hole is communicated with the first sealing cavity through the groove body and the notch respectively; when the sealing device is in a second oil path state, the through hole is directly communicated with the first sealing cavity; when the oil way is in a third oil way state, the through hole is communicated with the first sealing cavity through the notch;

the piston rod is provided with a forward state and a backward state, and when the piston rod is in the forward state, the oil cylinder device is in a first oil path state when the buffer ring is positioned on the left side of the through hole; the oil cylinder device is in a second oil path state when the buffer ring is positioned on the right side of the through hole; when the oil cylinder device is in a retreating state, the oil cylinder device is in a second oil path state when the buffer ring is positioned on the right side of the through hole; the oil cylinder device is in a third oil path state when the buffer ring is positioned on the left side of the through hole;

the flow of the hydraulic oil flowing through the through hole in unit time is larger than the sum of the flow of the hydraulic oil flowing through the groove body and the notch.

Furthermore, the buffer ring is made of elastic high polymer materials.

Further, the buffer ring is made of PDFE materials.

Furthermore, two through holes are arranged, and the two through holes are oppositely arranged along the movement direction of the piston rod; the buffer parts are two and are arranged in one-to-one correspondence with the through holes.

Further, the through holes are respectively provided near both end portions of the cylinder tube.

Further, the straight distance between the two through holes is larger than the length of the piston.

Furthermore, a sealing ring is arranged on the side wall of the piston, and the outer end part of the sealing ring is abutted against the inner wall of the cylinder barrel.

Further, an oil storage groove is formed in the side wall of the piston and located between the buffering portion and the sealing ring.

Further, the first sealed cavity is located on the left side of the second sealed cavity.

The embodiment of the application also discloses: a buffering method for an oil cylinder device is characterized by comprising the following steps:

in the forward state:

when the buffer ring at the left end is positioned on the left side of the through hole at the left side and the buffer ring at the right end is positioned on the right side of the through hole at the left side, hydraulic oil is injected from the through hole at the left side, and the injected hydraulic oil pushes the buffer ring at the left end from the right side of the groove body to the left side of the groove body, so that the through hole at the left side is communicated with the groove body; at the moment, the buffer ring at the right end is positioned at the left side of the corresponding groove body;

the hydraulic oil is injected into the first sealing space through the groove body and the gap of the buffer ring respectively, so that the piston rod can be pushed to move rightwards, and the hydraulic oil in the second sealing space is extruded to flow out from the through hole on the right side;

when the buffer ring at the left end is positioned on the right side of the through hole at the left side and the buffer ring at the right end is positioned on the left side of the through hole at the right side, hydraulic oil is injected from the through hole at the left side, and the injected hydraulic oil pushes the buffer ring at the left end from the left side of the tank body to the right side of the tank body; at the moment, the buffer ring at the right end is positioned at the left side of the corresponding groove body;

the hydraulic oil is directly injected into the first sealed space, so that the piston rod can be pushed to move rightwards continuously, and the hydraulic oil in the second sealed space is extruded to flow out of the through hole on the right side;

when the buffer ring at the left end is positioned on the left side of the right through hole and the buffer ring at the right end is positioned on the right side of the right through hole, hydraulic oil is injected from the left through hole, and the buffer ring at the left end is positioned on the right side of the groove body corresponding to the buffer ring at the left end; the buffer ring at the right end is positioned at the left side of the corresponding groove body;

the hydraulic oil is directly injected into the first sealing space, so that the piston rod can be pushed to move rightwards continuously, and the hydraulic oil in the second sealing space is extruded to flow out from the through hole on the right side after passing through the gap of the buffer ring on the right side until the piston rod stops moving rightwards;

in the reverse state:

when the buffer ring at the right end is positioned at the right side of the right through hole and the buffer ring at the left end is positioned at the left side of the right through hole, hydraulic oil is injected from the right through hole, and the injected hydraulic oil pushes the buffer ring at the right end from the left side of the groove body to the right side of the groove body, so that the through hole at the right side is communicated with the groove body; at the moment, the buffer ring at the left end is positioned at the right side of the corresponding groove body;

the hydraulic oil is injected into the second sealing space through the groove body and the gap of the buffer ring respectively, so that the piston rod can be pushed to move leftwards, and the hydraulic oil in the first sealing space is extruded to flow out of the through hole on the left side;

when the buffer ring at the right end is positioned on the left side of the through hole at the right side and the buffer ring at the left end is positioned on the right side of the through hole at the left side, hydraulic oil is injected from the through hole at the right side, and the injected hydraulic oil pushes the buffer ring at the right end to the left side of the groove body from the right side of the groove body; at the moment, the buffer ring at the left end is positioned at the right side of the corresponding groove body;

the hydraulic oil is directly injected into the second sealed space, so that the piston rod can be pushed to move leftwards continuously, and the hydraulic oil in the first sealed space is extruded to flow out of the through hole on the left side;

when the buffer ring at the right end is positioned at the right side of the through hole at the left side and the buffer ring at the left end is positioned at the left side of the through hole at the left side, hydraulic oil is injected from the through hole at the right side, and the buffer ring at the right end is positioned at the left side of the groove body corresponding to the buffer ring at the right end; the buffer ring at the left end is positioned at the right side of the corresponding groove body;

the hydraulic oil is directly injected into the second sealing space, so that the piston rod can be pushed to move leftwards continuously, and the hydraulic oil in the first sealing space is extruded to flow out of the through hole on the left side after passing through the gap of the buffer ring on the left side until the piston rod stops moving leftwards;

and hydraulic oil is injected into the left through hole and the right through hole in sequence, so that the piston rod can be pushed to reciprocate.

By means of the technical scheme, the invention has the following beneficial effects: through the oil circuit that the cooperation formed between buffer ring breach, cell body, the perforating hole, the flow control that control hydraulic oil flowed out in the unit interval and flowed into the cylinder realizes the buffering action to the piston rod, and the structure is ingenious, and the cooperation is simple.

In order to make the aforementioned and other objects, features and advantages of the invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the overall device in a first position when the piston rod is traveling to the right in an embodiment of the present invention;

FIG. 2 is an enlarged view of the structure at A in FIG. 1;

FIG. 3 is a schematic view of the overall device in a second position when the piston rod is traveling to the right in the embodiment of the present invention;

FIG. 4 is an enlarged view of the structure at B in FIG. 3;

FIG. 5 is a schematic view of the overall device at the third position when the piston rod moves to the right in the embodiment of the present invention;

FIG. 6 is an enlarged view of the structure at C in FIG. 5;

FIG. 7 is a schematic view of the overall device in the first position when the piston rod is moving to the left in the embodiment of the present invention;

FIG. 8 is an enlarged view of the structure of FIG. 7 at D;

FIG. 9 is a schematic view of the overall device in a second position when the piston rod is traveling to the left in the embodiment of the present invention;

FIG. 10 is an enlarged view of the structure at E in FIG. 9;

FIG. 11 is a schematic view of the overall device in a third position when the piston rod is traveling to the left in the embodiment of the present invention;

FIG. 12 is an enlarged view of the structure of FIG. 11 at F;

fig. 13 is a schematic diagram of a buffer switch according to the present invention.

Reference numerals of the above figures: 1. a cylinder barrel; 2. a piston rod; 3. a piston; 4. a first sealed space; 5. a second sealed space; 6. a through hole; 7. a trough body; 8. a buffer ring; 9. and (4) a notch.

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.

It should be noted that, in the description of the present invention, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no precedence between the two is considered as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Referring to fig. 1 and 13, the present embodiment discloses an oil cylinder device with a buffering mechanism, which includes a cylinder barrel 1 having a cavity, a rod 2 of a piston 3 located in the cylinder barrel 1, and a piston 3 fixedly connected to the rod 2 of the piston 3, wherein the cavity of the cylinder barrel 1 is divided into two opposite first sealed spaces 4 and second sealed spaces 5 by the piston 3. The oil cylinder device further comprises an oil port part and a buffer part, wherein the oil port part comprises at least one through hole 6 arranged on the side wall of the cylinder barrel 1; the buffer part comprises a groove body 7 which is arranged on the side wall of the piston 3 and can be communicated with the first sealing space 4, a buffer ring 8 which is arranged in the groove body 7 and abutted against the inner side wall of the cylinder barrel 1, and a notch 9 which can be respectively communicated with the through hole 6 and the first sealing space 4 is arranged on the buffer ring 8.

In the above arrangement, when the oil path is in the through hole 6 to the groove body 7 and in the first sealed space 4 or the second sealed space 5, the state is a slow start state; when the oil path is positioned from the through hole 6 to the first sealed space 4 or the second sealed space 5, the flow rate of the hydraulic oil flowing through the through hole 6 in unit time is greater than that of the hydraulic oil flowing through the groove body 7 in the same unit time, so that the oil path is in a quick operation state; when the oil path is in the first sealed space 4 or the second sealed space 5 to the gap 9 of the buffer ring 8 and then to the through hole 6, the flow rate of the hydraulic oil flowing through the gap 9 of the buffer ring 8 in unit time is smaller than that of the hydraulic oil flowing through the groove body 7 in the same unit time, so that the oil path is in a buffer stop state. Through the oil circuit that the cooperation formed between 8 breachs 9 of buffer ring, cell body 7, perforating hole 6, the flow control that control hydraulic oil flowed out and flowed into in cylinder 1 in the unit interval realizes the buffering action to 3 poles 2 of piston, and the structure is ingenious, and the cooperation is simple.

In the present embodiment, two through holes 6 are provided, and the two through holes 6 are provided to face each other in the movement direction of the rod 2 of the piston 3; the buffer parts are two and are arranged corresponding to the through holes 6 one by one. The through holes 6 are provided near both end portions of the cylinder tube 1, respectively. Specifically, the oil cylinder is integrally hollow cylindrical and extends in the left-right direction. The number of the through holes 6 is two, and the two through holes are respectively arranged at the left end part and the right end part which are close to the oil cylinder.

In the present embodiment, the linear distance between the through holes 6 is longer than the length of the piston 3. Can guarantee like this that the hydro-cylinder has the left side when 6 direct oil intakes of perforating hole, the right side 6 direct oil effluviums of perforating hole to guarantee the hydro-cylinder device has the normal operating condition of fast moving.

In this embodiment, the buffer ring 8 is sleeved in the slot 7, and preferably, the buffer ring 8 is made of an elastic polymer material, such as a PDFE material.

In the present embodiment, the oil cylinder device has a first oil passage state, a second oil passage state, and a third oil passage state. When the oil way is in the first oil way state, the through hole 6 is communicated with the first sealing cavity through the groove body 7 and the notch 9 respectively. When the oil passage is in the second oil passage state, the through hole 6 is directly communicated with the first seal cavity. When the oil passage is in the third oil passage state, the through hole 6 is communicated with the first seal cavity through the notch 9. The piston 3 and the rod 2 have a forward state and a backward state, and when the piston is in the forward state, the oil cylinder device is in a first oil path state when the buffer ring 8 is positioned on the left side of the through hole 6. The oil cylinder device is in a second oil path state when the cushion ring 8 is positioned on the right side of the through hole 6. When the oil cylinder device is in the retreated state, the oil cylinder device is in a second oil path state when the cushion ring 8 is positioned on the right side of the through hole 6. The oil cylinder device is in a third oil path state when the cushion ring 8 is positioned on the left side of the through hole 6. The flow rate of the hydraulic oil flowing through the through hole 6 in unit time is greater than the sum of the flow rates of the hydraulic oil flowing through the groove body 7 and the notch 9.

In this embodiment, a sealing ring is disposed on the side wall of the piston 3, and the outer end of the sealing ring abuts against the inner wall of the cylinder 1. The sealing ring can further ensure the relative tightness between the first sealed space 4 and the second sealed space 5.

In this embodiment, an oil storage groove is formed in the side wall of the piston 3, and the oil storage groove is located between the buffer portion and the seal ring. The oil outlet grooves are arranged in an inverted trapezoidal shape as shown in fig. 1, when oil is fed from the through holes 6, the hydraulic oil can be buffered, the impact force on the piston 3 is avoided being too large, and therefore the probability of the problem that the piston 3 is damaged in the clockwise mode and unstable in sliding is reduced.

As shown in fig. 1 and 2, the cylinder device is in a forward state, and the cushion ring 8 at the left end is located at the left side of the left through hole 6 and the cushion ring 8 at the right end is located at the right side of the left through hole 6. At the moment, hydraulic oil is injected from the left through hole 6, and the injected hydraulic oil pushes the buffer ring 8 at the left end from the right side of the tank body 7 to the left side of the tank body 7, so that the left through hole 6 is communicated with the tank body 7; the buffer ring 8 at the right end is positioned at the left side of the corresponding groove body 7. And hydraulic oil is respectively injected into the first sealing space 4 through the gaps 9 of the groove body 7 and the buffer ring 8, so that the piston 3 rod 2 can be pushed to move rightwards, and the hydraulic oil in the second sealing space 5 is extruded to flow out from the through hole 6 on the right side. At this time, the oil cylinder device can be defined to be in a buffering advancing state.

As shown in fig. 3 and 4, the cylinder device is in the forward state, and the cushion ring 8 at the left end is located at the right side of the left through hole 6 and the cushion ring 8 at the right end is located at the left side of the right through hole 6. At the moment, hydraulic oil is injected from the left through hole 6, and the injected hydraulic oil pushes the buffer ring 8 at the left end from the left side of the tank body 7 to the right side of the tank body 7; the buffer ring 8 at the right end is positioned at the left side of the corresponding groove body 7. The hydraulic oil is directly injected into the first sealed space 4, so that the piston 3 and the rod 2 can be pushed to move rightwards continuously, and the hydraulic oil in the second sealed space 5 is extruded to flow out from the through hole 6 on the right side. At this time, the oil cylinder device can be defined to be in a fast forward state.

As shown in fig. 5 and 6, the cylinder device is in the forward state, and the cushion ring 8 at the left end is located at the left side of the right through hole 6 and the cushion ring 8 at the right end is located at the right side of the right through hole 6. At the moment, hydraulic oil is injected from the left through hole 6, and the buffer ring 8 at the left end is positioned at the right side of the corresponding groove body 7; the buffer ring 8 at the right end is positioned at the left side of the corresponding groove body 7. The hydraulic oil is directly injected into the first sealed space 4, so that the piston 3 rod 2 can be pushed to move rightwards continuously, and the hydraulic oil in the second sealed space 5 is extruded to flow out from the through hole 6 on the right side after passing through the gap 9 of the buffer ring 8 on the right side until the piston 3 rod 2 stops moving rightwards. At this time, the oil cylinder device can be defined to be in a buffering stop state.

As shown in fig. 7 and 8, the cylinder device is in a retracted state, and the right cushion ring 8 is located on the right side of the right through hole 6 and the left cushion ring 8 is located on the left side of the right through hole 6. At the moment, hydraulic oil is injected from the right through hole 6, and the injected hydraulic oil pushes the buffer ring 8 at the right end from the left side of the tank body 7 to the right side of the tank body 7, so that the right through hole 6 is communicated with the tank body 7; the buffer ring 8 at the left end is positioned at the right side of the corresponding groove body 7. And hydraulic oil is respectively injected into the second sealing space 5 through the notches 9 of the groove body 7 and the buffer ring 8, so that the piston 3 can be pushed to move leftwards, and the hydraulic oil in the first sealing space 4 is extruded to flow out of the through hole 6 on the left side. At this time, it can be defined that the oil cylinder device is in a buffering and returning state.

As shown in fig. 9 and 10, the cylinder device is in a retracted state, and the cushion ring 8 at the right end is positioned on the left side of the right through hole 6 and the cushion ring 8 at the left end is positioned on the right side of the left through hole 6. At the moment, hydraulic oil is injected from the right through hole 6, and the right buffer ring 8 is pushed to the left side of the groove body 7 from the right side of the groove body 7 by the injected hydraulic oil; the buffer ring 8 at the left end is positioned at the right side of the corresponding groove body 7. The hydraulic oil is directly injected into the second sealed space 5, so that the piston 3 can be pushed, the rod 2 continues to move leftwards, and the hydraulic oil in the first sealed space 4 is extruded to flow out from the through hole 6 on the left side. It can be defined that the oil cylinder device is in a fast retraction state.

As shown in fig. 11 and 12, the cylinder device is in a retracted state, and the cushion ring 8 at the right end is positioned on the right side of the left through hole 6 and the cushion ring 8 at the left end is positioned on the left side of the left through hole 6. At the moment, hydraulic oil is injected from the right through hole 6, and the buffer ring 8 at the right end is positioned at the left side of the corresponding groove body 7; the buffer ring 8 at the left end is positioned at the right side of the corresponding groove body 7. The hydraulic oil is directly injected into the second sealed space 5, so that the piston 3 rod 2 can be pushed to move leftwards continuously, and the hydraulic oil in the first sealed space 4 is extruded to flow out of the through hole 6 on the left side after passing through the notch 9 of the buffer ring 8 on the left side until the piston 3 rod 2 stops moving leftwards. It can be defined that the oil cylinder device is in a buffering stop state at this time.

In conclusion, hydraulic oil is sequentially injected into the left through hole 6 and the right through hole 6, thereby pushing the piston 3 and the rod 2 to reciprocate.

The principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.