CN210423235U - Stroke-adjustable hydraulic cylinder and engineering machinery with same - Google Patents
Stroke-adjustable hydraulic cylinder and engineering machinery with same Download PDFInfo
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- CN210423235U CN210423235U CN201921392297.5U CN201921392297U CN210423235U CN 210423235 U CN210423235 U CN 210423235U CN 201921392297 U CN201921392297 U CN 201921392297U CN 210423235 U CN210423235 U CN 210423235U
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Abstract
The utility model provides a stroke adjustable pneumatic cylinder and engineering machine tool who has it, stroke adjustable pneumatic cylinder includes: the cylinder barrel is internally limited with a first cavity extending along the axial direction of the cylinder barrel and with an open end, the other end of the cylinder barrel is provided with a mounting hole communicated with the first cavity and extending along the axial direction of the first cavity, and the cylinder barrel is circumferentially provided with a first oil port, a second oil port and a third oil port communicated with the first cavity; the first rod body is internally provided with a second cavity extending along the axial direction of the first rod body, and one end of the second cavity facing the mounting hole is open; the second rod body is internally provided with a third cavity extending along the axial direction of the second rod body; one end of the core rod penetrates through the mounting hole to extend into the third cavity and is connected with the second rod body, and the core rod can move along the axial direction of the mounting hole so as to adjust the stroke of the first rod body and the stroke of the second rod body in the first cavity. According to the utility model discloses stroke adjustable pneumatic cylinder can satisfy the different operating condition of pneumatic cylinder, realizes overhanging and the stroke regulation that contracts.
Description
Technical Field
The utility model relates to an engineering machine tool technical field especially relates to a stroke adjustable pneumatic cylinder and engineering machine tool who has it.
Background
With the rapid development of economic construction in China, the market demand for high-level mechanical equipment such as medium and large cranes, excavators and loaders is increasing day by day. At present, high-mechanization equipment such as large cranes, excavators and loaders are all provided with hydraulic oil cylinders for lifting, pushing and pulling and the like, and play a central role in the processes of hoisting, loading and the like. The existing stroke adjusting structure is mainly externally adjusted, a fixing device needs to be additionally arranged at an external connecting position for external adjustment, the external installation time is long, the consequences of serious influence on the service life, such as corrosion, abrasion and the like, are easily generated, and the service life of the oil cylinder is shortened. The other type is a built-in adjusting structure, a limit ring is movably connected between the end cover and the piston to form a hard limit to limit the extending length of the piston rod, and the hard limit is sleeved on the piston rod, so that when stroke adjustment is performed, only the whole set of oil cylinder can be disassembled, and the stroke adjustment can be performed by changing the whole set of oil cylinder into a limit sleeve with a new length, and the use is inconvenient.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a stroke adjustable pneumatic cylinder, this pneumatic cylinder can realize overhanging and return the stroke regulation that contracts, the operation of being convenient for.
The utility model also provides an engineering machine tool with stroke adjustable pneumatic cylinder.
According to the utility model discloses the pneumatic cylinder of stroke adjustable of first aspect embodiment includes: the oil cylinder comprises a cylinder barrel, a first cavity, a second cavity and a third cavity, wherein the first cavity extends along the axial direction of the cylinder barrel, one end of the first cavity is open, the other end of the cylinder barrel is provided with a mounting hole which is communicated with the first cavity and extends along the axial direction of the first cavity, and the cylinder barrel is circumferentially provided with a first oil port, a second oil port and a third oil port which are communicated with the first cavity; the first rod body is movably arranged in the first cavity along the axial direction of the cylinder barrel, a second cavity extending along the axial direction of the first rod body is limited in the first rod body, and one end, facing the mounting hole, of the second cavity is open;
the second rod body is arranged in the second cavity body in a manner of extending along the axial direction of the first rod body, and a third cavity body extending along the axial direction of the second rod body is limited in the second rod body; the core rod is formed into a columnar shape, one end of the core rod penetrates through the mounting hole to extend into the third cavity and is connected with the second rod body, and the core rod can move along the axial direction of the mounting hole so as to adjust the stroke of the first rod body and the stroke of the second rod body in the first cavity.
According to the utility model discloses stroke adjustable pneumatic cylinder mutually supports through hydraulic fluid port and the different cavity of difference to go deep into the length of mounting hole through adjusting the core bar in order to change L2The length of the hydraulic cylinder can meet different working states of the hydraulic cylinder, realize the superposition of push-pull force and realize the stroke adjustment of extension and retraction.
According to the utility model discloses the pneumatic cylinder of stroke adjustable can also have following additional technical characterstic.
According to the utility model discloses an embodiment, the core bar with mounting hole threaded connection.
According to the utility model discloses an embodiment, the core bar includes: the outer peripheral surface of the first rod section is provided with an external thread corresponding to the internal thread of the mounting hole; the second rod section is coaxially arranged with the first rod section, one end of the second rod section is connected with the first rod section, the radial size of the second rod section is smaller than that of the first rod section, and the other end of the second rod section extends into the third cavity and is connected with the second rod body.
According to the utility model discloses an embodiment, the tip of the other end of second pole section is equipped with spacing portion, the external diameter of spacing portion is less than or equal to the internal diameter of third cavity just spacing portion is followed the axial of third cavity is mobile, the end of opening of third cavity is equipped with the cooperation portion, the cooperation portion with spacing portion cooperation is in order to restrict spacing portion is followed the third cavity breaks away from.
According to the utility model discloses an embodiment, spacing portion forms to establish the external screw thread of the outer wall face of second pole section, cooperation portion forms to establish the external screw thread of the internal face of the end that opens of third cavity.
According to the utility model discloses an embodiment, first hydraulic fluid port is established the other end of cylinder, the core bar is equipped with along its axially extended first oil circuit and along its radially extended second oil circuit, the one end of first oil circuit with third cavity intercommunication, the other end of first oil circuit with the inner intercommunication of second oil circuit, the outer end of second oil circuit extends to the outer wall of core bar, the core bar is followed the axial of mounting hole is mobile in order to adjust the second oil circuit with first hydraulic fluid port intercommunication or disconnection.
According to the utility model discloses an embodiment, the pneumatic cylinder of stroke adjustable still include: the guide ring is sleeved at one end of the second rod body, and the second rod body is movably arranged in the second cavity along the axial direction of the first rod body.
According to the utility model discloses an embodiment, be equipped with a plurality of through-holes that extend along its thickness direction on the guide ring.
According to an embodiment of the invention, the guiding ring is formed as a piece of copper material.
According to the utility model discloses engineering machine tool of second aspect embodiment includes the pneumatic cylinder of above-mentioned embodiment stroke adjustable.
Drawings
Fig. 1 is a schematic structural view of a hydraulic cylinder with adjustable stroke according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a hydraulic cylinder with an adjustable stroke according to an embodiment of the present invention.
Reference numerals:
a hydraulic cylinder 100 with adjustable stroke; a cylinder barrel 10; a first stick 20; a second stick 30; a core bar 40; a first pole segment 41; a second pole segment 42; a guide ring 50.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The following specifically describes the adjustable-stroke hydraulic cylinder 100 according to an embodiment of the present invention with reference to the drawings.
As shown in fig. 1 and 2, a hydraulic cylinder 100 with an adjustable stroke according to an embodiment of the present invention includes a cylinder tube 10, a first rod 20, a second rod 30, and a core rod 40.
Specifically, a first cavity extending along the axial direction of the cylinder 10 and having an open end is defined in the cylinder 10, a mounting hole communicating with the first cavity and extending along the axial direction is provided at the other end of the cylinder 10, a first oil port (an oil port at the left end of the upper side in fig. 1), a second oil port (an oil port at the right end of the upper side in fig. 1) and a third oil port (an oil port at the lower side in fig. 1) are provided in the circumferential direction of the cylinder 10, the first rod 20 is movably provided in the first cavity along the axial direction of the cylinder 10, a second cavity extending along the axial direction is defined in the first rod 20, the second cavity is open towards one end of the mounting hole, the second rod 30 is provided in the second cavity extending along the axial direction of the first rod 20, a third cavity extending along the axial direction is defined in the second rod 30, the core rod 40 is formed in a columnar shape, one end of the core rod 40 passes through the mounting hole and extends into the third cavity and is, the core bar 40 is movable along the axial direction of the mounting hole to adjust the stroke of the first rod 20 and the second rod 30 in the first cavity.
In other words, the hydraulic cylinder 100 with adjustable stroke mainly comprises a cylinder barrel 10, a first rod 20, a second rod 30 and a core rod 40, wherein the first rod 20 is sleeved with a piston, and three oil ports on the cylinder barrel 10 can satisfy various working conditions. State 1: no matter what state the oil cylinder is in, after the oil is fed from the first oil port, the piston drives the first rod body 20 and the second rod body 30 to move rightwards together until the stroke is finished, and a full-contraction state is reached. State 2: the oil enters the second oil port, the oil enters the second cavity, the piston drives the first rod body 20 and the second rod body 30 to move leftwards until the stroke is finished, the fully extended state is reached, at the moment, the oil in the first cavity flows out through the first oil port, and the oil in the third cavity flows out through the third oil port. State 3: in the fully extended state, the third port is filled with oil, the second rod 30 drives the first rod 20 and the piston to move rightwards, and the second rod 30 moves rightwardsIn the process, the stroke end is limited by two aspects, (wherein, the second rod body 30 forms a first end surface and a second end surface from right to left in sequence), and the first end surface is limited by the distance L between the surface opposite to the second end surface and the second end surface1On the other hand, the distance L between the first end face and the face of the core rod 40 opposite to the first end face2Determining that the length of the core bar 40 penetrating into the mounting hole can be adjusted by moving the core bar 40 back and forth to adjust L2And the distance from the full extension of the first rod 20 to the full retraction can be adjusted. And 4: and the second oil port is communicated with oil, when the first rod body 20 extends outwards, if the core rod 40 rotates to the rightmost end, the right end face of the first rod body 20 can be separated from the left end of the core rod 40 in a static sealing manner, the second oil port is communicated with the third oil port, the pressure disappears, the first rod body 20 cannot extend outwards continuously, the stroke is finished, and if the core rod 40 is rotated to move leftwards, the first rod body 20 continues to extend outwards, which is stroke adjustment in an extending state.
Therefore, according to the utility model discloses stroke adjustable pneumatic cylinder 100, mutually support through different hydraulic fluid ports and different cavitys to go deep into the length of mounting hole in order to change L through adjusting core bar 402The length of the hydraulic cylinder can meet different working states of the hydraulic cylinder, realize the superposition of push-pull force and realize the stroke adjustment of extension and retraction.
According to an embodiment of the present invention, the core bar 40 is threadedly connected to the mounting hole. Because the core rod 40 is fitted with the cylinder head through threads, the core rod 40 moves back and forth by rotating the threads, and L is adjusted2The size of (2) and then the distance that can adjust first body of rod 20 from extending to full contract, the regulation mode is simple, the operation of being convenient for.
Preferably, the core 40 comprises a first segment 41 and a second segment 42.
Specifically, the outer peripheral surface of the first rod section 41 is provided with an external thread corresponding to the internal thread of the mounting hole, the second rod section 42 is coaxially arranged with the first rod section 41, one end of the second rod section 42 is connected with the first rod section 41, the radial dimension of the second rod section 42 is smaller than that of the first rod section 41, and the other end of the second rod section 42 extends into the third cavity and is connected with the second rod body 30.
That is, the core bar 40 is composed mainly of the first barSegment 41 and second segment 42, the outer surface of first segment 41 being provided with external threads for mating with the internal threads of the mounting hole, L being adjustable by varying the length of first segment 41 threaded into the mounting hole2And further, the stroke of the hydraulic cylinder is changed, the second rod section 42 is connected with the first rod section 41, the diameter of the second rod section 42 is larger than that of the first rod section 41, the second rod section 42 mainly plays a role in connection, and the first rod section 41 can do telescopic motion in the third cavity.
Preferably, the end of the other end (left end in fig. 1) of the second rod section 42 is provided with a limiting portion, the outer diameter of the limiting portion is smaller than or equal to the inner diameter of the third cavity, and the limiting portion is movable along the axial direction of the third cavity, the open end of the third cavity (right end of the second rod 30 in fig. 1) is provided with a matching portion, and the matching portion is matched with the limiting portion to limit the limiting portion to be separated from the third cavity.
Further, the stopper portion may be formed as an external thread provided on an outer wall surface of the second rod section 42, and the fitting portion is formed as an external thread provided on an inner wall surface of the open end of the third cavity.
According to the utility model discloses an embodiment, first hydraulic fluid port is established at the other end of cylinder 10, core bar 40 is equipped with along its axially extended first oil circuit and along its radially extended second oil circuit, the one end and the third cavity intercommunication of first oil circuit, the other end of first oil circuit and the inner intercommunication of second oil circuit, the outer end of second oil circuit extends to core bar 40's outer wall, core bar 40 is mobile in order to adjust second oil circuit and first hydraulic fluid port intercommunication or disconnection along the axial of mounting hole, moreover, the steam generator is simple in structure.
In an embodiment of the present invention, the hydraulic cylinder 100 with adjustable stroke further includes a guiding ring 50, the guiding ring 50 is disposed at one end of the second rod 30, and the second rod 30 is movably disposed in the second cavity along the axial direction of the first rod 20.
Specifically, in order to ensure the guiding performance of the second rod 30, the guiding ring 50 is designed, and the length thereof can satisfy the requirement of guiding the second rod 30 no matter where the second rod 30 is located.
Preferably, the guide ring 50 is provided with a plurality of through holes extending in a thickness direction thereof to facilitate oil passing.
According to an embodiment of the present invention, the guide ring 50 is formed as a piece of copper material, which is low cost.
It should be noted that, in order to ensure the correct oil path, a plurality of static seals are usually provided on the first rod 20, the second rod 30, the piston, and the like.
According to the utility model discloses pneumatic cylinder 100 with adjustable stroke, hydraulic fluid port and different cavitys mutually support through the difference to through adjusting the length that core bar 40 gos deep into the mounting hole in order to change L2The length of the hydraulic cylinder can meet different working states of the hydraulic cylinder, realize the superposition of push-pull force and realize the stroke adjustment of extension and retraction.
According to the utility model discloses engineering machine tool includes the pneumatic cylinder 100 of stroke adjustable according to above-mentioned embodiment, because according to the utility model discloses the pneumatic cylinder 100 of stroke adjustable of above-mentioned embodiment has above-mentioned technological effect, consequently, according to the utility model discloses engineering machine tool also has corresponding technological effect, realizes the stack of push-pull power promptly, realizes the stroke regulation of overhanging and returning of contracting.
Other structures and operations of the construction machine according to the embodiments of the present invention will be understood and readily implemented by those skilled in the art, and thus will not be described in detail.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. An adjustable stroke hydraulic cylinder, comprising:
the oil cylinder comprises a cylinder barrel, a first cavity, a second cavity and a third cavity, wherein the first cavity extends along the axial direction of the cylinder barrel, one end of the first cavity is open, the other end of the cylinder barrel is provided with a mounting hole which is communicated with the first cavity and extends along the axial direction of the first cavity, and the cylinder barrel is circumferentially provided with a first oil port, a second oil port and a third oil port which are communicated with the first cavity;
the first rod body is movably arranged in the first cavity along the axial direction of the cylinder barrel, a second cavity extending along the axial direction of the first rod body is limited in the first rod body, and one end, facing the mounting hole, of the second cavity is open;
the second rod body is arranged in the second cavity body in a manner of extending along the axial direction of the first rod body, and a third cavity body extending along the axial direction of the second rod body is limited in the second rod body;
the core rod is formed into a columnar shape, one end of the core rod penetrates through the mounting hole to extend into the third cavity and is connected with the second rod body, and the core rod can move along the axial direction of the mounting hole so as to adjust the stroke of the first rod body and the stroke of the second rod body in the first cavity.
2. The adjustable stroke hydraulic cylinder of claim 1 wherein said core pin is threadably connected to said mounting hole.
3. The adjustable stroke hydraulic cylinder of claim 2 wherein the core rod comprises:
the outer peripheral surface of the first rod section is provided with an external thread corresponding to the internal thread of the mounting hole;
the second rod section is coaxially arranged with the first rod section, one end of the second rod section is connected with the first rod section, the radial size of the second rod section is smaller than that of the first rod section, and the other end of the second rod section extends into the third cavity and is connected with the second rod body.
4. The hydraulic cylinder with the adjustable stroke according to claim 3, wherein a limiting part is arranged at the end part of the other end of the second rod section, the outer diameter of the limiting part is smaller than or equal to the inner diameter of the third cavity, the limiting part can move along the axial direction of the third cavity, and a matching part is arranged at the open end of the third cavity and is matched with the limiting part to limit the limiting part to be separated from the third cavity.
5. The stroke-adjustable hydraulic cylinder according to claim 4, wherein the stopper portion is formed as an external thread provided on an outer wall surface of the second rod segment, and the engagement portion is formed as an external thread provided on an inner wall surface of the open end of the third chamber.
6. The hydraulic cylinder with the adjustable stroke according to claim 1, wherein the first oil port is formed at the other end of the cylinder barrel, the core rod is provided with a first oil path extending along the axial direction of the core rod and a second oil path extending along the radial direction of the core rod, one end of the first oil path is communicated with the third cavity, the other end of the first oil path is communicated with the inner end of the second oil path, the outer end of the second oil path extends to the outer wall surface of the core rod, and the core rod can move along the axial direction of the mounting hole to adjust the communication or disconnection between the second oil path and the first oil port.
7. The adjustable stroke hydraulic cylinder of claim 1 further comprising:
the guide ring is sleeved at one end of the second rod body, and the second rod body is movably arranged in the second cavity along the axial direction of the first rod body.
8. The adjustable stroke hydraulic cylinder of claim 7 wherein the guide ring has a plurality of through holes extending through the guide ring in the thickness direction.
9. The adjustable stroke hydraulic cylinder of claim 7 wherein the guide ring is formed as a piece of copper material.
10. A working machine, characterized in that it comprises a stroke-adjustable hydraulic cylinder according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921392297.5U CN210423235U (en) | 2019-08-26 | 2019-08-26 | Stroke-adjustable hydraulic cylinder and engineering machinery with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921392297.5U CN210423235U (en) | 2019-08-26 | 2019-08-26 | Stroke-adjustable hydraulic cylinder and engineering machinery with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210423235U true CN210423235U (en) | 2020-04-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921392297.5U Active CN210423235U (en) | 2019-08-26 | 2019-08-26 | Stroke-adjustable hydraulic cylinder and engineering machinery with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210423235U (en) |
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2019
- 2019-08-26 CN CN201921392297.5U patent/CN210423235U/en active Active
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