CN214063451U - Oil cylinder and oil cylinder assembly - Google Patents

Abstract

The application provides an oil cylinder and an oil cylinder assembly. The hydro-cylinder includes: the bottom of the cylinder barrel is provided with a through hole; the valve seat is provided with a channel, and the channel is communicated with the through hole; the piston is movably arranged in the cylinder barrel, and a first oil way is formed in the piston; the core pipe is connected with the piston in a sliding and sealing mode, one end of the core pipe is communicated with the first oil way of the piston, and the other end of the core pipe extends into the channel and is communicated with the channel; the buffering guide structure is arranged on the piston and is also sleeved on the core pipe. Through the technical scheme of this application, can provide support and direction for the core pipe to make the core pipe have certain buffering floating space in the passageway, reduced the degree of difficulty of core pipe assembly, reduced the phenomenon that the core pipe collides with the lateral wall of piston, passageway.

Description

Oil cylinder and oil cylinder assembly

Technical Field

The application belongs to the technical field of hydraulic engineering, and particularly relates to an oil cylinder and an oil cylinder assembly.

Background

Some oil cylinders include a cylinder barrel, a piston rod, a core tube and a valve seat. The valve seat is arranged at the bottom of the cylinder barrel, is connected with the cylinder barrel and controls the stretching of the oil cylinder. The valve seat is provided with a channel and an oil way, the core tube is connected with the piston in a sliding and sealing mode, one end of the core tube is arranged in the oil way in the piston, and the other end of the core tube extends into the channel of the valve seat. The oil path is opened or closed by the core tube along with the extension of the piston.

Because the length of the core pipe is long, the core pipe is easy to assemble or move into the channel and cannot extend into the channel. Or the core tube may collide with the piston, the channel.

SUMMERY OF THE UTILITY MODEL

Embodiments according to the present application aim to ameliorate at least one of the technical problems of the prior art or the related art.

In view of the above, an object of the embodiments according to the present application is to provide a cylinder.

It is another object of embodiments according to the present application to provide a cylinder assembly.

In order to achieve the above object, an embodiment according to a first aspect of the present application provides a cylinder, including: the bottom of the cylinder barrel is provided with a through hole; the valve seat is provided with a channel, and the channel is communicated with the through hole; the piston is movably arranged in the cylinder barrel, and a first oil way is formed in the piston; the core pipe is connected with the piston in a sliding and sealing mode, one end of the core pipe is communicated with the first oil way of the piston, and the other end of the core pipe extends into the channel and is communicated with the channel; the buffering guide structure is arranged on the piston and is also sleeved on the core pipe.

In the technical scheme, the buffer guide structure is arranged, so that the core tube is convenient to support and guide, and meanwhile, a certain floating space can be provided for the core tube in the radial direction, so that the core tube is easy to assemble, and the phenomenon that the core tube collides with the side walls of the piston and the channel is reduced.

In the above technical scheme, the buffer guide structure is located at one end of the piston close to the bottom of the cylinder barrel.

In any one of the above technical solutions, the buffer guide structure includes: the buffer sleeve is arranged at one end of the piston close to the bottom of the cylinder barrel, and the buffer sleeve is sleeved on the core pipe; and the limiting part is used for limiting the axial movement of the buffer sleeve.

In the above technical solution, the cushion collar includes: a buffer part at least partially extending out of the piston; and the limiting part is connected with the buffering part and is arranged between the piston and the limiting part.

In the above technical solution, the outer diameter of the buffer part is smaller than the inner diameter of the channel.

In the technical scheme, the piston is provided with a first mounting groove, and the limiting part is arranged in the first mounting groove; be equipped with the second mounting groove on the lateral wall of mounting groove, the locating part is located in the second mounting groove.

In any one of the above technical solutions, the limiting member is a retainer ring.

In the above technical scheme, the retainer ring is an elastic retainer ring for a hole.

In any one of the above technical solutions, the oil cylinder further includes: and the second oil way is arranged on one side of the valve seat and is communicated with the channel.

According to an embodiment of a second aspect of the present application, there is provided a cylinder assembly including a plurality of cylinders according to any one of the above-described first aspects, wherein the second oil path of at least one cylinder communicates with an adjacent cylinder.

In this technical scheme, through adopting the hydro-cylinder of any one above-mentioned technical scheme to have had above-mentioned technical scheme's whole beneficial effect, no longer repeated here. The second oil path of at least one oil cylinder is communicated with the adjacent oil cylinder, so that the sequential telescopic oil cylinder assembly with a plurality of oil cylinders capable of sequentially stretching in a grading manner is formed, the stretching of the next-stage oil cylinder is realized through the on-off of the second oil path, and the telescopic oil cylinder is simple in structure and easy to control.

Additional aspects and advantages of embodiments in accordance with the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments in accordance with the present application.

Drawings

FIG. 1 is a schematic illustration in partial cross-sectional view of a cylinder according to one embodiment provided herein;

FIG. 2 is a schematic illustration of the operating principle of a cylinder assembly according to an embodiment provided herein;

FIG. 3 is a cross-sectional structural schematic view of a cylinder assembly according to an embodiment provided herein;

fig. 4 is a partially enlarged schematic view of a portion a in fig. 3.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 4 is:

10 oil cylinders, 100 cylinder barrels, 101 through holes, 102 valve seats, 104 pistons, 105 first oil passages, 106 core pipes, 108 buffer guide structures, 110 buffer sleeves, 112 buffer parts, 114 limit parts, 116 limit parts, 140 channels, 142 second oil passages, 144 first installation grooves, 146 second installation grooves and 20 oil cylinder assemblies.

Detailed Description

In order that the above objects, features and advantages of embodiments according to the present application may be more clearly understood, embodiments according to the present application will be described in further detail below with reference to the accompanying drawings and detailed description. It should be noted that features of embodiments according to the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth to provide a thorough understanding of embodiments according to the present application, however, embodiments according to the present application may be practiced in other ways than those described herein, and therefore the scope of protection afforded by embodiments according to the present application is not limited by the specific embodiments disclosed below.

Some embodiments provided in accordance with the present application are described below with reference to fig. 1-4.

As shown in fig. 1 to 4, an embodiment according to a first aspect of the present application provides a cylinder 10 including a cylinder barrel 100, a valve seat 102, a piston 104, and a core tube 106.

Specifically, the bottom of the cylinder tube 100 is provided with a through hole 101. The valve seat 102 has a passage 140, and the passage 140 communicates with the through-hole 101. The piston 104 is movably disposed in the cylinder 100, and the piston 104 has a first oil path 105 therein. One end of the core tube 106 extends into the piston 104 to communicate with the first oil passage 105, the core tube 106 is slidably and sealingly connected to the piston 104, the other end of the core tube 106 extends into the passage 140 to communicate with the passage 140, and the core tube 106 moves in the passage 140 along with the movement of the piston 104 in the cylinder 100. The buffer guide structure 108 is disposed on the piston 104, and the buffer guide structure 108 is further sleeved on the core tube 106.

In this embodiment, the buffer guide structure 108 is provided to provide support and guidance for the core tube 106, and also to provide a certain floating space for the core tube 106 in the radial direction, so that the core tube 106 is easy to assemble, and the collision between the core tube 106 and the side walls of the piston 104 and the channel 140 is reduced.

Specifically, the core tube 106 generally has a longer length. A core tube 106 that is too long, when extended through the piston 104 into the passageway 140, may not be easily aligned with the passageway 140 due to gravity, machining tolerances, etc., and may be difficult to assemble. In addition, for assembly, the core tube 106 and the piston 104 are generally in clearance fit, i.e., the outer diameter of the core tube 106 is smaller than the diameter of the hole on the piston 104, and in the case of a long length of the core tube 106, the core tube 106 is likely to collide with the piston 104 during installation. In this embodiment, the buffering guide structure 108 is disposed on the piston 104 and sleeved on the core tube 106, so as to provide support and guide for the core tube 106 during assembly. That is, during the installation of the core tube 106, the user inserts one end of the core tube 106 into the piston 104, and after the end extends to a certain depth, the end can be inserted into the buffering guide structure 108, so that the end can continue to extend into the channel 140 with the buffering guide structure 108 as a fulcrum. Because the buffer guide structure 108 is used as a fulcrum, the buffer guide structure 108 plays a certain guiding role, so that the core tube 106 is convenient to align to the channel 140, and the convenience of assembly is improved.

By arranging the valve seat 102, the channel 140 on the valve seat 102 is communicated with the through hole 101 at the bottom of the cylinder 100, so that the valve seat 102 is used for controlling the extension and retraction of the oil cylinder 10.

In the above embodiment, the cushioning guide structure 108 is located at an end of the piston 104 near the bottom of the cylinder 100. Thus, a fulcrum and guide point is formed on the piston 104 at the end near the bottom of the cylinder 100. The tube 106 has already extended a substantial length after passing through the piston 104, and due to the obstruction of the piston 104, only one end of the tube 106 is held, and the extended end is prone to deflection under the influence of gravity and machining tolerances. Since the cushioned guide structure 108 forms a fulcrum at the end of the piston 104 near the bottom of the cylinder barrel 100, the core tube 106 can be supported and guided at this point, facilitating assembly. Meanwhile, the offset of the core tube 106 after long-distance extension is corrected, the core tube is convenient to align with the channel 140, and the installation convenience is improved.

In addition, the buffering guide structure 108 is disposed at an end of the piston 104 close to the bottom of the cylinder barrel 100 and is sleeved on the core tube 106, so that the core tube 106 can be centered. That is to say, the core tube 106 and the hole wall of the piston 104 and the side wall of the channel 140 can have a longer distance, so that a certain buffer floating space is provided, the phenomenon that the core tube 106 collides with the hole wall of the piston 104 and the side wall of the channel 140 is reduced, and the safety and reliability of the use of the core tube 106 are improved.

In any of the above embodiments, the cushioning guide structure 108 includes: the buffer sleeve 110 is arranged at one end of the piston 104 close to the bottom of the cylinder barrel 100, and the buffer sleeve 110 is sleeved on the core tube 106; and the limiting piece 116, wherein the limiting piece 116 is used for limiting the axial movement of the buffer sleeve 110.

In this embodiment, the buffer sleeve 110 fits over the core tube 106 to provide support and guidance to the core tube 106. The axial movement of the buffer sleeve 110 is limited by the limiting member 116, so that the buffer sleeve 110 is relatively fixed, and the buffer sleeve 110 does not separate from the piston 104, so that the buffer sleeve 110 can be supported by the piston 104, thereby providing support for the core tube 106 and preventing the core tube 106 from touching the piston 104. The structure is simple, and the processing requirements on the cylindricity and the straightness of the core tube 106 are favorably reduced, so that the processing difficulty and the assembly difficulty are reduced. The buffer sleeve 110 is disposed at an end of the piston 104 near the bottom of the cylinder barrel 100 to provide support for the core tube 106 thereat and to facilitate movement of the buffer sleeve 110 with the piston 104 into the passageway 140 to provide buffering of the core tube 106 within the passageway 140.

As shown in fig. 4, in the above embodiment, the cushion cover 110 includes: a cushioning portion 112 extending at least partially from the piston 104; the position-limiting portion 114 is connected to the buffer portion 112, and the position-limiting portion 114 is disposed between the piston 104 and the position-limiting member 116.

In this embodiment, the buffer 112 extends at least partially out of the piston 104, such that when the piston 104 moves toward the bottom of the cylinder 100 and approaches the channel 140, the portion of the buffer 112 extending out of the piston 104 may be inserted into the channel 140, thereby providing support for the core tube 106 within the channel 140. Meanwhile, the position of the core tube 106 can be centered in the radial direction, so that a larger distance is kept between the core tube 106 and the side wall of the channel 140, and a certain floating buffer space is formed in the channel 140 for the core tube 106, which is beneficial to reducing the phenomenon that the core tube 106 collides with the side wall of the channel 140. The limiting portion 114 is disposed between the piston 104 and the limiting member 116, that is, the limiting portion 114 is sandwiched between the piston 104 and the limiting member 116, and meanwhile, the limiting portion 114 and the buffering portion 112 are connected to each other, so that the limiting portion 114 is limited by the limiting member 116 and the piston 104, and the buffer sleeve 110 is axially limited.

In the above embodiment, the outer diameter of the buffer portion 112 is smaller than the inner diameter of the passage 140.

In this embodiment, the outer diameter of the buffer 112 is smaller than the inner diameter of the channel 140, which is advantageous to ensure that the buffer 112 can be inserted into the channel 140 when the piston 104 moves towards the channel 140, thereby providing guidance and support for the core tube 106 in the channel 140, so that the core tube 106 can have a certain buffer floating space in the channel 140.

In the above embodiment, the piston 104 is provided with the first mounting groove 144, and the limiting portion 114 is disposed in the first mounting groove 144; the sidewall of the first mounting groove 144 is provided with a second mounting groove 146, and the limiting member 116 is disposed in the second mounting groove 146. The structure is simple, installation can be achieved only by placing the buffer sleeve 110 into the first installation groove 144, and the installation is convenient and fast. The position-limiting member 116 is disposed in the second mounting groove 146, and the second mounting groove 146 is disposed on the sidewall of the first mounting groove 144, so that the position-limiting member 116 is blocked by the second mounting groove 146 in the axial direction of the piston 104, thereby providing axial position limitation for the position-limiting portion 114.

In any of the above embodiments, the retaining member 116 is a retaining ring.

In this embodiment, the retainer ring is used as the limiting member 116, so that the structure is simple and the assembly is convenient. And the retaining ring is easy to obtain, does not need special processing, and is favorable for the convenience of maintenance of the lifting oil cylinder 10.

In the above embodiment, the retainer ring is a circlip for a hole.

In this embodiment, the check ring is a circlip for hole, that is, the check ring has a certain elasticity, so that when the installation is performed, the check ring can be placed into the second installation groove 146 by using the elasticity of the check ring, and then the check ring expands and expands in the second installation groove 146 under the elastic action. The retaining ring expands tightly in second mounting groove 146, is difficult for droing, is favorable to promoting its job stabilization nature and to the spacing validity of cushion collar 110.

As shown in fig. 1 and 2, in any of the above embodiments, the oil cylinder 10 further includes: and a second oil passage 142 provided on one side of the valve seat 102, the second oil passage 142 communicating with the passage 140.

In this embodiment, by providing the second oil passage 142 in the valve seat 102 and communicating with the passage 140, and the passage 140 communicating with the first oil passage 105 through the core tube 106, the valve seat 102 is facilitated to control the extension and contraction of the oil cylinder 10 through the second oil passage 142. And the valve seat 102 is conveniently connected with other oil cylinders 10 through the second oil path 142 to form a sequential telescopic oil cylinder.

As shown in fig. 2 and 3, according to an embodiment of a second aspect of the present application, there is provided a cylinder assembly 20 including a plurality of cylinders 10 according to any one of the embodiments of the first aspect, wherein the second oil path 142 of at least one cylinder 10 communicates with an adjacent cylinder 10.

In this embodiment, by using the oil cylinder 10 according to any one of the embodiments, all the beneficial effects of the embodiments are achieved, and are not described herein again. The second oil path 142 of at least one oil cylinder 10 is communicated with the adjacent oil cylinder 10, which is beneficial to forming the sequential telescopic oil cylinder assembly 20 with a plurality of oil cylinders 10 capable of sequentially telescoping in a grading manner, and the telescopic oil cylinder 10 of the next stage is realized by the on-off of the second oil path 142, and the structure is simple and easy to control.

According to the oil cylinder 10 of one embodiment provided by the application, by arranging the buffering guide structure 108, when the core tube 106 moves synchronously with the piston 104, the buffering guide structure 108 enables the core tube 106 to have a buffering floating space in the channel 140, so that the high requirement of a conventional buffering structure on a size gap is reduced, and the assembly difficulty is reduced.

As shown in fig. 1 and 2, the cushion guide structure 108 includes a cushion sleeve 110 and a retainer ring (i.e., a stopper 116). The buffer sleeve 110 is sleeved outside the core tube 106 and can be attached to the inner wall of the channel 140, and the buffer sleeve 110 is limited on the retainer ring. The retainer ring is disposed in the second mounting groove 146 on the piston 104.

The retainer ring is made of spring steel, two ends of the retainer ring can be pinched to be small by a tool and placed into the second mounting groove 146 through the hole of the piston 104, and then the tool is loosened. The two ends of the retainer ring can be restored to the original state due to the elastic force and are limited in the second mounting groove 146.

The working principle is as follows:

when the core tube 106 moves synchronously with the piston 104, the buffer sleeve 110 also moves slowly with the piston 104, and the buffer sleeve 110 can swing within the channel 140 by a small amount, i.e., the buffer portion 112 of the buffer sleeve 110 and the channel 140 are in clearance fit, so that the core tube 106 has a buffer floating space within the channel 140. In addition, the limiting part 114 of the buffer sleeve 110 is limited by the retainer ring, and when the core tube 106 moves along with the piston 104, the retainer ring can limit the moving distance of the buffer part 112 of the buffer sleeve 110, so that the floating range of the core tube 106 is limited, the structure is compact, the high requirement of the conventional buffer structure on the size gap is reduced, and the processing difficulty and the assembly difficulty are reduced.

The advantages of this embodiment are as follows:

1) when the core pipe moves synchronously with the piston, the buffering guide structure can enable the core pipe to have a buffering floating space in the channel, so that the assembly difficulty is reduced;

2) the buffering guide structure is simple and compact in structure.

The above embodiments provided by the present application are described in detail with reference to the accompanying drawings, and by the embodiments, the core tube can be supported and guided, and the core tube has a certain buffering floating space in the channel, so that the difficulty of core tube assembly is reduced, and the phenomenon that the core tube collides with the piston and the side wall of the channel is reduced.

In embodiments according to the present application, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. Specific meanings of the above terms in the embodiments according to the present application can be understood by those of ordinary skill in the art as the case may be.

In the description of the embodiments according to the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience of description and simplification of description of the embodiments according to the present application, and do not indicate or imply that the referred devices or units must have a specific direction, be configured and operated in a specific orientation, and thus, cannot be construed as limitations on the embodiments according to the present application.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example in accordance with the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above embodiments are merely preferred embodiments according to the present application, and are not intended to limit the embodiments according to the present application, and those skilled in the art may make various modifications and variations to the embodiments according to the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the embodiments according to the present application shall be included in the protection scope of the embodiments according to the present application.

Claims (10)

1. An oil cylinder, characterized by comprising:

the bottom of the cylinder barrel (100) is provided with a through hole (101);

a valve seat (102) having a passage (140), the passage (140) communicating with the through-hole (101);

the piston (104) is movably arranged in the cylinder barrel (100), and a first oil path (105) is formed in the piston (104);

the core tube (106) is connected with the piston (104) in a sliding and sealing mode, one end of the core tube (106) is communicated with the first oil path (105) of the piston (104), and the other end of the core tube (106) extends into the channel (140) and is communicated with the channel (140);

the buffer guide structure (108) is arranged on the piston (104), and the buffer guide structure (108) is also sleeved on the core pipe (106).

2. The cylinder of claim 1,

the cushioning guide structure (108) is located at one end of the piston (104) near the bottom of the cylinder (100).

3. The cylinder according to claim 1 or 2, characterized in that the cushioning guide structure (108) comprises:

the buffer sleeve (110) is arranged at one end, close to the bottom of the cylinder barrel (100), of the piston (104), and the buffer sleeve (110) is sleeved on the core pipe (106);

a stop member (116), the stop member (116) for limiting axial movement of the cushion collar (110).

4. The cylinder according to claim 3, characterized in that said cushion jacket (110) comprises:

a cushioning portion (112) extending at least partially from the piston (104);

and the limiting part (114) is connected with the buffer part (112), and the limiting part (114) is arranged between the piston (104) and the limiting part (116).

5. The cylinder of claim 4,

the outer diameter of the buffer (112) is smaller than the inner diameter of the channel (140).

6. The cylinder of claim 4,

a first mounting groove (144) is formed in the piston (104), and the limiting part (114) is arranged in the first mounting groove (144);

a second mounting groove (146) is formed in the side wall of the first mounting groove (144), and the limiting piece (116) is arranged in the second mounting groove (146).

7. The cylinder of claim 3,

the limiting piece (116) is a retainer ring.

8. The cylinder of claim 7,

the retainer ring is an elastic retainer ring for holes.

9. The cylinder according to claim 1 or 2, characterized in that the cylinder (10) further comprises:

and a second oil passage (142) provided on one side of the valve seat (102), the second oil passage (142) being communicated with the passage (140).

10. A cylinder assembly, comprising:

a plurality of the oil cylinders (10) according to any one of claims 1 to 9, the second oil path (142) of at least one of the oil cylinders (10) communicating with an adjacent one of the oil cylinders (10).

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