CN113251026B - Combined piston rod for stretcher and piston cylinder with piston rod - Google Patents
Combined piston rod for stretcher and piston cylinder with piston rod Download PDFInfo
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- CN113251026B CN113251026B CN202110621345.9A CN202110621345A CN113251026B CN 113251026 B CN113251026 B CN 113251026B CN 202110621345 A CN202110621345 A CN 202110621345A CN 113251026 B CN113251026 B CN 113251026B
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- piston rod
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- wall
- cylinder body
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- 230000008719 thickening Effects 0.000 claims abstract description 29
- 238000007789 sealing Methods 0.000 claims description 19
- 239000012530 fluid Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 72
- 238000000034 method Methods 0.000 description 4
- 239000010720 hydraulic oil Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 229910001234 light alloy Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1428—Cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1433—End caps
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention provides a combined piston rod for a stretcher and a piston cylinder with the piston rod, wherein the piston rod comprises a piston rod A and a piston rod B, the piston rod B is formed by welding and fixing an end plug, an outer pipe, an inner pipe and an end inner pipe, an oil flowing gap is formed between the outer pipe and the inner pipe, two ends of the outer pipe are provided with an oil port A1 and an oil port A2, the right end of the piston rod A is provided with a thickening part, the left end of the piston rod B is fixedly connected with the right end of the thickening part, the thickening part is provided with an oil port B2, and the end plug is provided with the oil port B1. The piston cylinder employs the piston rod. The piston rod disclosed by the invention is assembled by the piston rod A and the piston rod B, wherein the piston rod B is welded by four parts, and the piston rod A and the piston rod B are independently processed, so that the processing difficulty of the slender piston rod is reduced, and the processing precision is ensured.
Description
Technical Field
The invention relates to the technical field of stretching of light alloy plates, in particular to a piston rod of a stretcher, and especially relates to a combined piston rod for the stretcher and a piston cylinder with the piston rod.
Background
The piston rods of the existing similar large-scale stretcher are all integral forgings, the length of the piston rods is more than 20 meters, and in order to ensure the sealing service life of the cylinder body, the surface precision of the piston rods is high, so that the processing difficulty is high, and the transportation and the disassembly are inconvenient. The existing piston rod has the following defects:
1. and the processing of the oil way in the piston rod is deep hole processing, and when the length of the piston rod exceeds a certain value, the deep hole cannot be processed.
2. The piston rod is of an integral structure, and the processing difficulty is high.
3. The piston rod is too long, low in rigidity, easy to deform and incapable of being transported.
4. The piston rod is inconvenient to assemble and disassemble.
Disclosure of Invention
According to the technical problems, a combined piston rod for a stretcher and a piston cylinder with the piston rod are provided.
The invention adopts the following technical means:
a combined piston rod for a stretcher, the piston rod comprising a piston rod a and a piston rod B;
the piston rod B comprises an end plug, an outer pipe, an inner pipe and an end inner pipe which are coaxially arranged, wherein the right end face of the inner pipe is welded with the left end face of the end plug, the left end face of the inner pipe is welded with the right end face of the end inner pipe, the outer pipe is sleeved outside the inner pipe, the right end face of the outer pipe is welded with the left end face of the end plug, the left end inner wall of the outer pipe is welded with the middle outer wall of the end inner pipe, the inner diameter of the end inner pipe is matched with the inner diameter of the inner pipe, a first blind hole matched with the inner diameter of the inner pipe is machined at the left part of the end plug, the axis of the first blind hole is coincident with the axis of the end plug, and a fluid oil gap is formed between the inner pipe and the outer pipe; two ends of the outer tube are respectively provided with a plurality of oil ports A1 and A2 which are communicated with the oil flowing gap; the outer wall of the end plug is provided with a plurality of oil ports B1 communicated with the first blind hole;
the right end of the piston rod A is provided with a thickening part, the right end of the thickening part is provided with a mounting groove, the left end of the end part inner pipe and the left end of the outer pipe are positioned in the mounting groove, the left end of the outer pipe is provided with a shaft shoulder bulge, the mounting groove is provided with a connecting cavity at the right end of the shaft shoulder bulge, a connecting block is partially positioned in the connecting cavity, a part of the connecting block is propped against the right end surface of the shaft shoulder bulge, and a bolt fixedly connects the connecting block with the wall of the mounting groove;
the inner wall of the end part is provided with a first blind hole, the outer wall of the thickening part is provided with a plurality of oil ports B2 communicated with the first blind hole, and the inner wall of the end part is provided with a plurality of oil ports B2 communicated with the second blind hole.
The piston rod B is sleeved with an oil distributor, and the oil distributor wraps the oil port A1 and the oil port B1 and is respectively communicated with the oil port A1 and the oil port B1.
And a first sealing ring is arranged between the outer wall of the end part inner pipe and the mounting groove.
The outer wall of the thickening part is provided with a second sealing ring and a guide sleeve, and the guide sleeve and the second sealing ring are positioned on the right side of the oil port B2.
The oil ports A1 are uniformly distributed around the axis of the outer tube, the oil ports A2 are uniformly distributed around the axis of the outer tube, the oil ports B1 are uniformly distributed around the axis of the end plugs, and the oil ports B2 are uniformly distributed around the axis of the thickening portions.
The outer tube and the inner tube can be seamless steel tubes. The piston rod B is welded and fixed.
The invention also provides a piston cylinder, which comprises the piston rod, a piston cylinder body, a plunger cylinder body and a cylinder cover;
the middle part of the piston cylinder body is provided with a ring-shaped radial bulge, the part of the piston cylinder body on the left side of the radial bulge is arranged in the plunger, the cylinder cover is positioned on the left side of the plunger, and an oil cavity C is formed between the cylinder cover and the left end of the plunger; the cylinder cover and the plunger are arranged in the plunger cylinder body, the left end of the piston rod A enters the piston cylinder body, penetrates through the left end face of the piston cylinder body, the left end face of the plunger and the oil cavity C and is fixedly connected with the cylinder cover, the inner diameter of the piston cylinder body is matched with the outer diameter of the thickening part, and an oil cavity D is formed in a gap between the left part of the thickening part of the piston rod A and the inner wall of the piston cylinder body;
the right end of the piston cylinder body is fixedly provided with an annular sealing cover, the inner diameter of the annular sealing cover is matched with the outer diameter of the outer tube, an oil cavity E is formed by a gap between the thickening part and the annular sealing cover, and the oil port A2 is communicated with the oil cavity E.
The part of the piston cylinder body on the right side of the radial bulge is provided with a movable chuck.
Compared with the prior art, the invention has the following advantages:
according to the combined type piston rod for the stretcher, the piston rod is assembled by the piston rod A and the piston rod B, wherein the piston rod B is welded by four parts, the piston rod A and the piston rod B are independently processed, the processing difficulty of the slender piston rod is reduced, and the processing precision is ensured.
In the piston cylinder, the connecting part of the piston rod A and the piston rod B is a piston (a thickening part), and the middle part of the piston cylinder has a supporting effect on the whole piston rod. The cylinder cover, the plunger and the piston cylinder body support the left side of the piston rod, and the oil distributor supports the right side of the piston rod, so that the piston rod is effectively prevented from being excessively deflected.
Through the sectional design of the piston rod B and the piston rod A, the deep hole machining procedure of the oil hole is avoided, and the technical level of the large-scale stretcher is improved.
According to the combined piston rod for the stretcher, two oil ways in the piston rod are all arranged around the center and are mutually independent, and the processing amount is small. Long-distance external oil passage arrangement is avoided. The oil inlet and outlet are arranged on the oil distributor at one end.
According to the combined type piston rod for the stretcher, as the piston rod A and the piston rod B are independently processed, the rod diameter can be independently designed according to different moving speeds and thrust requirements of the stretcher.
Based on the reasons, the invention can be widely popularized in the fields of piston rods, piston cylinders and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of a combined piston rod for a stretching machine according to embodiments 1 and 2 of the present invention.
Fig. 2 is an enlarged view of the section I in fig. 1.
Fig. 3 is a schematic diagram of a piston cylinder according to embodiment 2 of the present invention.
In the figure: A. a piston rod A; a1, an oil port A1; a2, an oil port A2; B. a piston rod B; b1, an oil port B1; b2, an oil port B2; C. an oil cavity C; D. an oil cavity D; E. an oil cavity E;
1. an end plug; 1001. a first blind hole; 2. an outer tube; 201. a running oil gap; 3. an inner tube; 4. an end inner tube; 401. a first seal ring; 5. a thickening part; 501. a second blind hole; 502. a second seal ring; 503. guide sleeve; 6. a connecting block; 7. an oil separator; 8. a piston cylinder block; 801. radial protrusions; 802. an annular cover; 9. a plunger; 10. a plunger cylinder block; 11. a cylinder cover; 12. a movable chuck.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be clear that the dimensions of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention: the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
Example 1
As shown in fig. 1-2, a combined piston rod for a stretcher, the piston rod comprising a piston rod a and a piston rod B;
the piston rod B comprises an end plug 1, an outer tube 2, an inner tube 3 and an end inner tube 4 which are coaxially arranged, wherein the right end face of the inner tube 3 is welded with the left end face of the end plug 1, the left end face of the inner tube 3 is welded with the right end face of the end inner tube 4, the outer tube 2 is sleeved outside the inner tube 3, the right end face of the outer tube 2 is welded with the left end face of the end plug 1, the inner wall of the left end of the outer tube 2 is welded with the middle outer wall of the end inner tube 4, the inner diameter of the end inner tube 4 is matched with the inner diameter of the inner tube 3, a first blind hole 101 matched with the inner diameter of the inner tube 3 is machined at the left part of the end plug 1, the axis of the first blind hole 101 coincides with the axis of the end plug 1, and an oil flowing gap 201 is formed between the inner tube 3 and the outer tube 2; two ends of the outer tube 2 are respectively provided with a plurality of oil ports A1 and A2 which are communicated with the oil flowing gap 201; the outer wall of the end plug 1 is provided with a plurality of oil ports B1 communicated with the first blind hole 101;
the right end of the piston rod A is provided with a thickening part 5, the right end of the thickening part 5 is provided with a mounting groove, the left end of the end part inner pipe 4 and the left end of the outer pipe 2 are positioned in the mounting groove, the left end of the outer pipe 2 is provided with a shaft shoulder bulge 202, the mounting groove is provided with a connecting cavity at the right end of the shaft shoulder bulge 202, a part of the connecting block 6 is positioned in the connecting cavity, the right end face of the shaft shoulder bulge 202 is propped against the part of the connecting block 6, and a bolt fixedly connects the connecting block 6 with the groove wall of the mounting groove;
the right end of the thickening portion 5 is internally provided with a second blind hole 501, the right end of the second blind hole 501 is communicated with the end inner pipe 4, and the outer wall of the thickening portion 5 is provided with a plurality of oil ports B2 communicated with the second blind hole 501.
The piston rod B is sleeved with an oil distributor 7, and the oil distributor 7 wraps the oil port A1 and the oil port B1 and is respectively communicated with the oil port A1 and the oil port B1.
A first sealing ring 401 is arranged between the outer wall of the end inner pipe 4 and the mounting groove.
The outer wall of the thickening part 5 is provided with a second sealing ring 502 and a guide sleeve 503, and the guide sleeve 503 and the second sealing ring 502 are positioned on the right side of the oil port B2.
The oil ports A1 are uniformly distributed around the axis of the outer tube 2, the oil ports A2 are uniformly distributed around the axis of the outer tube 2, the oil ports B1 are uniformly distributed around the axis of the end plug 1, and the oil ports B2 are uniformly distributed around the axis of the thickening part 5.
The end plug 1, the outer tube 2, the inner tube 3 and the end inner tube 4 are fixed in a welding mode.
Example 2
As shown in fig. 1 to 3, on the basis of embodiment 1, the present invention also provides a piston cylinder comprising a piston rod, a piston cylinder body 8, a plunger 9, a plunger cylinder body 10 and a cylinder head 11 in embodiment 1;
the middle part of the piston cylinder body 8 is provided with a ring-shaped radial bulge 801, the part of the piston cylinder body 8 on the left side of the radial bulge 801 is arranged in the plunger 9, the cylinder cover 11 is positioned on the left side of the plunger 9, and an oil cavity C is processed between the cylinder cover 11 and the left end of the plunger 9; the cylinder cover 11 and the plunger 9 are arranged in the plunger cylinder body 10, the left end of the piston rod A enters the piston cylinder body 8, passes through the left end surface of the piston cylinder body 8, the left end surface of the plunger 9 and the oil cavity C and is fixedly connected with the cylinder cover 11, the inner diameter of the piston cylinder body 8 is matched with the outer diameter of the thickening part 5, and an oil cavity D is formed by a gap between the left part of the thickening part 5 and the inner wall of the piston cylinder body 8;
an annular sealing cover 802 is fixed at the right end of the piston cylinder body 8, the inner diameter of the annular sealing cover 802 is matched with the outer diameter of the outer tube 2, an oil cavity E is formed by a gap between the thickening part 5 and the annular sealing cover 802, and the oil port A2 is communicated with the oil cavity E.
The piston cylinder body 8 is provided with a movable chuck 12 at the right side of the radial protrusion.
When the stretching machine works, the oil cavity C is filled with oil, the plunger 9 is pushed to move rightwards, the plunger 9 pushes the piston cylinder body 8 to move rightwards, the piston cylinder body 8 drives the movable chuck 12 to move rightwards, and stretching operation is carried out on the plate strip. Simultaneously, the oil port A1 is communicated with hydraulic oil, and the hydraulic oil enters the oil cavity E after passing through the oil port A2. Hydraulic oil discharged from the oil cavity D is discharged through the oil ports B2 and B1. After the stretching is finished, the plunger 9 is not moved, and the movable clamp 12 continues to move to the right for a certain distance, so that the stretched steel plate is conveniently lifted away. And finally, oil is fed into the oil cavity D, oil is returned into the oil cavity E, the stretching cylinder is restored to the initial position, and one stretching working process is finished.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (7)
1. A combined piston rod for a stretcher, characterized in that the piston rod comprises a piston rod A and a piston rod B;
the piston rod B comprises an end plug, an outer pipe, an inner pipe and an end inner pipe which are coaxially arranged, wherein the right end face of the inner pipe is welded with the left end face of the end plug, the left end face of the inner pipe is welded with the right end face of the end inner pipe, the outer pipe is sleeved outside the inner pipe, the right end face of the outer pipe is welded with the left end face of the end plug, the left end inner wall of the outer pipe is welded with the middle outer wall of the end inner pipe, the inner diameter of the end inner pipe is matched with the inner diameter of the inner pipe, a first blind hole matched with the inner diameter of the inner pipe is machined at the left part of the end plug, the axis of the first blind hole is coincident with the axis of the end plug, and a fluid oil gap is formed between the inner pipe and the outer pipe; two ends of the outer tube are respectively provided with a plurality of oil ports A1 and A2 which are communicated with the oil flowing gap; the outer wall of the end plug is provided with a plurality of oil ports B1 communicated with the first blind hole;
the right end of the piston rod A is provided with a thickening part, the right end of the thickening part is provided with a mounting groove, the left end of the end part inner pipe and the left end of the outer pipe are positioned in the mounting groove, the left end of the outer pipe is provided with a shaft shoulder bulge, the mounting groove is provided with a connecting cavity at the right end of the shaft shoulder bulge, a connecting block is partially positioned in the connecting cavity, a part of the connecting block is propped against the right end surface of the shaft shoulder bulge, and a bolt fixedly connects the connecting block with the wall of the mounting groove;
the inner wall of the end part is provided with a first blind hole, the outer wall of the thickening part is provided with a plurality of oil ports B2 communicated with the first blind hole, and the inner wall of the end part is provided with a plurality of oil ports B2 communicated with the second blind hole.
2. The combined piston rod for the stretcher according to claim 1, wherein the piston rod B is sleeved with an oil separator, and the oil separator wraps the oil port A1 and the oil port B1 and is respectively communicated with the oil port A1 and the oil port B1.
3. A modular piston rod for a stretcher according to claim 1, characterized in that a first sealing ring is provided between the outer wall of the end inner tube and the mounting groove.
4. The combined piston rod for the stretching machine according to claim 1, wherein a second sealing ring and a guide sleeve are installed on the outer wall of the thickening portion, and the guide sleeve and the second sealing ring are located on the right side of the oil port B2.
5. A combined piston rod for a stretching machine according to claim 1, wherein a plurality of the oil ports A1 are uniformly distributed around the axis of the outer tube, a plurality of the oil ports A2 are uniformly distributed around the axis of the outer tube, a plurality of the oil ports B1 are uniformly distributed around the axis of the end plugs, and a plurality of the oil ports B2 are uniformly distributed around the axis of the thickened portion.
6. A piston cylinder comprising a piston rod, a piston cylinder block, a plunger cylinder block and a cylinder head according to any one of claims 1 to 5;
the middle part of the piston cylinder body is provided with a ring-shaped radial bulge, the part of the piston cylinder body on the left side of the radial bulge is arranged in the plunger, the cylinder cover is positioned on the left side of the plunger, and an oil cavity C is formed between the cylinder cover and the left end of the plunger; the cylinder cover and the plunger are arranged in the plunger cylinder body, the left end of the piston rod A enters the piston cylinder body, penetrates through the left end face of the piston cylinder body, the left end face of the plunger and the oil cavity C and is fixedly connected with the cylinder cover, the inner diameter of the piston cylinder body is matched with the outer diameter of the thickening part, and an oil cavity D is formed in a gap between the left part of the thickening part of the piston rod A and the inner wall of the piston cylinder body;
the right end of the piston cylinder body is fixedly provided with an annular sealing cover, the inner diameter of the annular sealing cover is matched with the outer diameter of the outer tube, an oil cavity E is formed by a gap between the thickening part and the annular sealing cover, and the oil port A2 is communicated with the oil cavity E.
7. A piston cylinder according to claim 6, wherein the portion of the cylinder body to the right of the radial projection is fitted with a movable collet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110621345.9A CN113251026B (en) | 2021-06-03 | 2021-06-03 | Combined piston rod for stretcher and piston cylinder with piston rod |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110621345.9A CN113251026B (en) | 2021-06-03 | 2021-06-03 | Combined piston rod for stretcher and piston cylinder with piston rod |
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| CN113251026A CN113251026A (en) | 2021-08-13 |
| CN113251026B true CN113251026B (en) | 2024-02-06 |
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| CN115609236B (en) * | 2022-09-28 | 2023-09-15 | 中信重工机械股份有限公司 | Machining method for piston rod section with complex combined double-layer structure |
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| CN205780021U (en) * | 2016-07-12 | 2016-12-07 | 中国重型机械研究院股份公司 | A kind of Double-plunger compound hydraulic cylinder device |
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| CN111453638A (en) * | 2020-03-26 | 2020-07-28 | 三一重型装备有限公司 | Deep hole piston rod of side-push jack and machining method and application thereof |
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2021
- 2021-06-03 CN CN202110621345.9A patent/CN113251026B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3808872A (en) * | 1971-12-29 | 1974-05-07 | J Martin | Device in particular for drawing sheet-metal |
| CN1515368A (en) * | 2003-08-26 | 2004-07-28 | 苏州市越海拉伸机械有限公司 | Lower cylinder of hydraulic duoble-action stretching machine |
| CN2637796Y (en) * | 2003-08-26 | 2004-09-01 | 苏州市越海拉伸机械有限公司 | Hydraulic double-motion stretcher top oil cylinder |
| CN104373418A (en) * | 2014-10-30 | 2015-02-25 | 无锡市威海达机械制造有限公司 | Piston rod type hydraulic cylinder structure |
| CN105587711A (en) * | 2014-11-18 | 2016-05-18 | 扬州市江都永坚有限公司 | Stretching oil cylinder of industrial aluminum profile stretching rolling mill |
| CN205780021U (en) * | 2016-07-12 | 2016-12-07 | 中国重型机械研究院股份公司 | A kind of Double-plunger compound hydraulic cylinder device |
| CN110886739A (en) * | 2019-12-05 | 2020-03-17 | 徐州徐工液压件有限公司 | Double-rod hydraulic cylinder with assembled piston rod with rod internal oil through structure |
| CN111453638A (en) * | 2020-03-26 | 2020-07-28 | 三一重型装备有限公司 | Deep hole piston rod of side-push jack and machining method and application thereof |
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