CN210484242U - Two-stage telescopic oil cylinder in preform oil press - Google Patents
Two-stage telescopic oil cylinder in preform oil press Download PDFInfo
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- CN210484242U CN210484242U CN201921253984.9U CN201921253984U CN210484242U CN 210484242 U CN210484242 U CN 210484242U CN 201921253984 U CN201921253984 U CN 201921253984U CN 210484242 U CN210484242 U CN 210484242U
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Abstract
The utility model discloses a two-stage telescopic oil cylinder in a preform oil press, which comprises a base, a piston rod, a piston sleeve, an inner cylinder barrel and an outer cylinder barrel which are coaxially sleeved together from inside to outside in sequence, wherein the upper end between the piston rod and the piston sleeve is provided with a sealing connection structure, the interior of the piston rod is of a hollow structure, the top of the piston rod is provided with an opening, the base is provided with a first pressure oil port communicated with the interior of the piston rod and a second pressure oil port communicated with the interior between the piston rod and the piston sleeve, the upper end of the outer cylinder barrel seals and surrounds the top end of the inner cylinder barrel, the lower end of the outer cylinder barrel is fixed with an outer cylinder barrel guide sleeve matched with the outer wall surface of the inner cylinder barrel in a sliding sealing way, the upper end of the inner cylinder barrel is provided with an outer cylinder barrel locating part matched with the outer wall surface of the piston sleeve in a sliding sealing way, the wall surface of the upper end of the inner cylinder barrel is provided with a first oil passing hole, and the wall surface of the upper end of the piston sleeve is provided with a second oil passing hole.
Description
Technical Field
The utility model relates to a flexible hydro-cylinder of two-stage among preformed blank hydraulic press is applied to in the prefabricated blank's of PTFE course of working pressing equipment, belongs to prefabricated blank pressing equipment technical field.
Background
In the field of PTFE processing, an important process is the pressing of a preformed blank at present, in the prior art, a standard hydraulic oil cylinder is adopted to press the preformed blank, in the pressing process, because raw materials are loose, the pressing compression is large, the pressing compression is required to be simultaneously pressed up and down, in the blank pressing process, enough pressure is required to be kept right at the beginning of the process, and after the pressing is finished, the blank is ejected out of a die by small pressure. The lower oil cylinder is required to eject the prefabricated blank out of the pressing die after the prefabricated blank is well pressed, so that the lower oil cylinder is required to have a relatively large stroke, the size of the oil cylinder is about 160mm longer than the stroke generally under the condition that the stroke of the oil cylinder is fixed, the lower oil cylinder with a relatively large size is required to be adopted, the height of the whole equipment is relatively large, the operation is inconvenient when raw materials are added, and the transportation and installation of the equipment are also limited.
Disclosure of Invention
An object of the utility model is to provide a flexible hydro-cylinder of two-stage among preformed blank hydraulic press can reduce the size of hydro-cylinder on the basis that does not reduce the hydro-cylinder stroke greatly to improve equipment's compactedness and convenient operation nature.
The utility model adopts the following technical scheme: a two-stage telescopic oil cylinder in a pre-blank oil press comprises a base, a piston rod, a piston sleeve, an inner cylinder barrel and an outer cylinder barrel, wherein the piston rod, the piston sleeve, the inner cylinder barrel and the outer cylinder barrel are sequentially coaxially sleeved from inside to outside, a first annular cavity is arranged between the piston rod and the piston sleeve, a second annular cavity is arranged between the piston sleeve and the inner cylinder barrel, the bottom ends of the piston rod and the piston sleeve are hermetically fixed on the base, the upper end between the piston rod and the piston sleeve is provided with a sealing connection structure, the inside of the piston rod is of a hollow structure, the top of the piston rod is provided with an opening, the base is provided with a first pressure oil port and a second pressure oil port, the first pressure oil port is communicated with the inside of the piston rod, the second pressure oil port is communicated with the second annular cavity, the upper end of the outer cylinder barrel is of a sealing structure, the upper end of the inner cylinder barrel is provided with an outer cylinder barrel limiting part in stop fit with the outer cylinder barrel guide sleeve, the lower end of the inner cylinder barrel is fixedly provided with an inner cylinder barrel guide sleeve in sliding seal fit with the outer wall surface of the piston sleeve, the upper end of the piston sleeve is provided with an opening, the upper end of the piston sleeve is provided with an inner cylinder barrel limiting part in stop fit with the inner cylinder barrel guide sleeve, the wall surface of the upper end of the inner cylinder barrel is provided with a first oil passing hole, the inner space of the piston rod is communicated with the first annular cavity through the first oil passing hole, the wall surface of the upper end of the piston sleeve is provided with a.
The axis of the first oil passing hole is flush with the stopping central point of the outer cylinder barrel stopping structure on the horizontal plane.
And the axis of the second oil passing hole is flush with the stop central point of the inner cylinder barrel stop structure on the horizontal plane.
The outer cylinder barrel locating part is of a sleeve structure with a top surface, a hole is formed in the top surface of the outer cylinder barrel locating part sleeve, and the lower end face of the outer cylinder barrel locating part sleeve is in blocking fit with the outer cylinder barrel guide sleeve.
The inner cylinder barrel limiting part is of a sleeve structure which is communicated up and down, and the lower end face of the sleeve of the inner cylinder barrel limiting part is in blocking fit with the inner cylinder barrel guide sleeve.
The outer wall of the inner cylinder barrel guide sleeve is fixed on the inner wall of the inner cylinder barrel, and the upper portion of the inner cylinder barrel guide sleeve is in stop fit with the inner cylinder barrel limiting part.
The upper end between the piston rod and the piston sleeve is welded together in a sealing way.
The outer wall of the outer cylinder barrel guide sleeve is fixed on the inner wall of the outer cylinder barrel, and the upper end face of the outer cylinder barrel guide sleeve is in stop fit with the outer cylinder barrel limiting part.
And the outer top surface outside the outer cylinder barrel is provided with a pushing piece groove.
And an elastic sealing gasket is arranged on the inner top surface inside the outer cylinder barrel.
The utility model discloses a theory of operation of two-stage flexible hydro-cylinder does: when the oil cylinder ascends, pressure oil enters the oil cylinder from the first pressure oil port, the pressure oil upwards enters the rodless cavity of the outer cylinder barrel from the inside of the piston rod, the pressure oil upwards pushes the inner top surface of the outer cylinder barrel to enable the outer cylinder barrel to ascend, and in the ascending process of the outer cylinder barrel, rod cavity oil of the outer cylinder barrel sequentially flows out of the second pressure oil port through the second oil passing hole and the first oil passing hole; when the outer cylinder barrel rises to the maximum stroke, the oil pressure rises, pressure oil enters between the outer cylinder barrel and the inner cylinder barrel from the second oil passing hole and the first oil passing hole, the pressure oil enables the inner cylinder barrel to start rising until the highest position, and the rising stroke is finished. When the oil cylinder descends, pressure oil enters the oil cylinder from the second pressure oil port, the pressure oil firstly enters the first annular cavity between the piston rod and the piston sleeve and then enters the interior of the piston rod through the second oil passing hole, rodless cavity oil of the inner oil cylinder flows out from the first pressure oil port, and the inner cylinder barrel begins to descend until the pressure oil descends to the minimum stroke; and then the pressure oil enters between the outer cylinder barrel and the inner cylinder barrel from the second oil passing hole and the first oil passing hole, the outer cylinder barrel starts to descend under the action of the oil pressure until the pressure oil descends to the lowest position, and the whole descending stroke is finished.
The utility model has the advantages that: because the utility model discloses a two-stage telescopic cylinder suppresses the prefabricated base through the flexible of inner cylinder and outer cylinder, through two-stage extending structure, makes the hydro-cylinder size reduce obviously, and the hydro-cylinder can be done is little than the stroke, compares with prior art, the utility model discloses a two-stage telescopic cylinder height dimension can reduce more than 2/5, has compact structure, and the oil circuit is simple, reduces equipment height, and convenient operation's characteristics have still overcome the complicated processing problem of prior art hydraulic cylinder piston rod inner structure, ensure that inside oil circuit is sealed reliable.
Preferably, after pressing is finished, an ejector is arranged in the ejector groove of the outer cylinder barrel, and the preform is ejected by the ejector.
Preferably, an elastic sealing gasket is arranged on the inner top surface inside the outer cylinder barrel, the oil pressure pushes the elastic sealing gasket upwards, the oil pressure does not directly act on the top surface of the outer cylinder barrel, the outer cylinder barrel rises, and the sealing performance and the service life of the oil cylinder are improved.
Drawings
Fig. 1 is a schematic structural view of a two-stage telescopic cylinder according to an embodiment of the present invention;
FIG. 2 is a state diagram of the two-stage telescopic cylinder of FIG. 1 in which the outer cylinder is at the maximum stroke;
fig. 3 is a state diagram of the two-stage telescopic cylinder of fig. 1 in which the inner cylinder is at the maximum stroke.
In the figure, 1-a base, 11-a first pressure oil port, 12-a second pressure oil port, 2-a piston rod, 3-a piston sleeve, 4-an inner cylinder barrel, 41-an inner cylinder barrel guide sleeve, 42-an inner cylinder barrel limiting piece, 5-an outer cylinder barrel, 51-an outer cylinder barrel guide sleeve, 52-an outer cylinder barrel limiting piece, 6-a first oil through hole, 7-a second oil through hole, 8-a pushing piece groove and 9-an elastic sealing gasket.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The utility model relates to a structure of two-stage flexible hydro-cylinder of embodiment is as shown in fig. 1 to fig. 3, the two-stage flexible hydro-cylinder in the preformed blank hydraulic press of this embodiment includes base 1 and from inside to outside coaxial sleeve in proper order establishes piston rod 2 together, piston bush 3, interior cylinder 4 and outer cylinder 5, first annular chamber has between piston rod 2 and the piston bush 3, second annular chamber has between piston bush 3 and the interior cylinder 4, third annular chamber has between interior cylinder 4 and the outer cylinder 5, the equal seal fixation in base 1 in bottom of piston rod 2 and piston bush 3, the upper end between piston rod 2 and the piston bush 3 has sealing connection structure, the sealing connection structure of this embodiment is the weld part, that is to say, the upper end seal welding between piston rod 2 and the piston bush 3 is in the same place. The interior of the piston rod 2 is of a hollow structure, the top of the piston rod is provided with an opening, the base 1 is provided with a first pressure oil port 11 and a second pressure oil port 12, the first pressure oil port 11 is communicated with the interior of the piston rod 2, the second pressure oil port 12 is communicated with a second annular cavity, the upper end of the outer cylinder 5 is provided with a sealing structure which surrounds the top end of the inner cylinder 4, the lower end of the outer cylinder 5 is fixed with an outer cylinder guide sleeve 51 which is matched with the outer wall surface of the inner cylinder 4 in a sliding and sealing way, the upper end of the inner cylinder 4 is provided with an opening, the upper end of the inner cylinder 4 is provided with an outer cylinder limiting piece 52 which is matched with the outer cylinder guide sleeve stopper 51 in a stopping way, the lower end of the inner cylinder 4 is fixed with an inner cylinder guide sleeve 41 which is matched with the outer wall surface of the piston sleeve 3 in a sliding and sealing way, the upper end of the piston sleeve 3, the first oil passing hole 6 communicates the inner space of the piston rod 2 with the first annular cavity, and the axis of the first oil passing hole 6 is flush with the stopping central point of the outer cylinder barrel stopping structure on the horizontal plane. And a second oil passing hole 7 is formed in the wall surface of the upper end of the piston sleeve 3, the first annular cavity is communicated with the second annular cavity through the second oil passing hole 7, and the axis of the second oil passing hole 7 is flush with the stopping central point of the inner cylinder barrel stopping structure on the horizontal plane.
In this embodiment, the outer cylinder limiting member 52 is a sleeve structure having a top surface, a hole is formed in the top surface of the sleeve of the outer cylinder limiting member 52, and the lower end surface of the sleeve of the outer cylinder limiting member 52 is in blocking fit with the outer cylinder guide sleeve 51. The inner cylinder barrel limiting part 42 is of a sleeve structure which is communicated up and down, and the lower end face of the sleeve of the inner cylinder barrel limiting part 42 is in blocking fit with the inner cylinder barrel guide sleeve 41. The outer wall of the inner cylinder guide sleeve 41 is fixed on the inner wall of the inner cylinder 4, and the upper part of the inner cylinder guide sleeve 41 is in stop fit with the inner cylinder limiting part 42. The outer wall of the outer cylinder guide sleeve 51 is fixed on the inner wall of the outer cylinder 5, and the upper end face of the outer cylinder guide sleeve 51 is in blocking fit with the outer cylinder limiting piece 52.
In this embodiment, the outer top surface outside the outer cylinder 5 is provided with a pushing piece groove 8, and the inner top surface inside the outer cylinder 5 is provided with an elastic sealing gasket 9.
The working principle of the two-stage telescopic oil cylinder of the embodiment is as follows: when the oil cylinder ascends, as shown in fig. 1 in an initial state, pressure oil enters the oil cylinder from the first pressure oil port, the pressure oil enters the rodless cavity of the outer cylinder barrel from the inside of the piston rod upwards, the pressure oil pushes the inner top surface of the outer cylinder barrel upwards to enable the outer cylinder barrel to ascend, in the ascending process of the outer cylinder barrel, oil in the cavity with the rod of the outer cylinder barrel sequentially flows out of the second pressure oil port through the second oil passing hole and the first oil passing hole, and when the outer cylinder barrel ascends to the maximum stroke, as shown in fig. 2; the oil pressure rises, the pressure oil enters between the outer cylinder and the inner cylinder from the second oil passing hole and the first oil passing hole, the pressure oil enables the inner cylinder to start rising until the highest position, and as shown in fig. 3, the rising stroke is finished. When the oil cylinder descends, as shown in fig. 3 in an initial state, pressure oil enters the oil cylinder from the second pressure oil port, the pressure oil firstly enters the first annular cavity between the piston rod and the piston sleeve and then enters the interior of the piston rod through the second oil passing hole, rodless cavity oil of the inner oil cylinder flows out from the first pressure oil port, and the inner cylinder barrel begins to descend until the inner cylinder barrel descends to the minimum stroke, as shown in fig. 2; then the pressure oil enters between the outer cylinder and the inner cylinder from the second oil passing hole and the first oil passing hole, the outer cylinder starts to descend under the action of the oil pressure until the outer cylinder descends to the lowest position, and as shown in fig. 1, the whole descending stroke is finished.
Because the utility model discloses a two-stage telescopic cylinder suppresses the prefabricated base through the flexible of inner cylinder and outer cylinder, through two-stage extending structure, makes the hydro-cylinder size reduce obviously, and the hydro-cylinder can be done is little than the stroke, compares with prior art, the utility model discloses a two-stage telescopic cylinder height dimension can reduce more than 2/5, has compact structure, and the oil circuit is simple, reduces equipment height, and convenient operation's characteristics have still overcome the complicated processing problem of prior art hydraulic cylinder piston rod inner structure, ensure that inside oil circuit is sealed reliable.
The foregoing embodiments and description have been provided to illustrate the principles of the invention and, without departing from the spirit and scope of the invention, there are various changes and modifications that fall within the scope of the invention as claimed.
Claims (10)
1. A two-stage telescopic oil cylinder in a preform oil press is characterized in that: the piston rod and the piston sleeve are coaxially sleeved together from inside to outside, a first annular cavity is arranged between the piston rod and the piston sleeve, a second annular cavity is arranged between the piston sleeve and the inner cylinder, the bottom ends of the piston rod and the piston sleeve are hermetically fixed on the base, the upper end between the piston rod and the piston sleeve is provided with a sealing connection structure, the interior of the piston rod is of a hollow structure, the top of the piston rod is provided with an opening, the base is provided with a first pressure oil port and a second pressure oil port, the first pressure oil port is communicated with the interior of the piston rod, the second pressure oil port is communicated with the second annular cavity, the upper end of the outer cylinder is a sealing structure which surrounds the top end of the inner cylinder, the lower end of the outer cylinder is fixedly provided with an outer cylinder guide sleeve which is in sliding sealing fit with the outer wall surface of the inner cylinder, the upper end of the inner cylinder is provided with an opening, the lower end of the inner cylinder barrel is fixedly provided with an inner cylinder barrel guide sleeve in sliding seal fit with the outer wall surface of the piston sleeve, the upper end surface of the piston sleeve is provided with an opening, the upper end of the piston sleeve is provided with an inner cylinder barrel limiting part in stop fit with the inner cylinder barrel guide sleeve, the wall surface of the upper end of the inner cylinder barrel is provided with a first oil passing hole, the first oil passing hole communicates the inner space of the piston rod with the first annular cavity, the wall surface of the upper end of the piston sleeve is provided with a second oil passing hole, and the second oil passing hole communicates the.
2. The two-stage telescopic cylinder in a preform oil press according to claim 1, characterized in that: the axis of the first oil passing hole is flush with the stopping central point of the outer cylinder barrel stopping structure on the horizontal plane.
3. The two-stage telescopic cylinder in a preform oil press according to claim 1, characterized in that: and the axis of the second oil passing hole is flush with the stop central point of the inner cylinder barrel stop structure on the horizontal plane.
4. The two-stage telescopic cylinder in a preform oil press according to claim 1, characterized in that: the outer cylinder barrel locating part is of a sleeve structure with a top surface, a hole is formed in the top surface of the outer cylinder barrel locating part sleeve, and the lower end face of the outer cylinder barrel locating part sleeve is in blocking fit with the outer cylinder barrel guide sleeve.
5. The two-stage telescopic cylinder in a preform oil press according to claim 1, characterized in that: the inner cylinder barrel limiting part is of a sleeve structure which is communicated up and down, and the lower end face of the sleeve of the inner cylinder barrel limiting part is in blocking fit with the inner cylinder barrel guide sleeve.
6. The two-stage telescopic cylinder in a preform oil press according to claim 1, characterized in that: the outer wall of the inner cylinder barrel guide sleeve is fixed on the inner wall of the inner cylinder barrel, and the upper portion of the inner cylinder barrel guide sleeve is in stop fit with the inner cylinder barrel limiting part.
7. The two-stage telescopic cylinder in a preform oil press according to claim 1, characterized in that: the upper end between the piston rod and the piston sleeve is welded together in a sealing way.
8. The two-stage telescopic cylinder in a preform oil press according to claim 1, characterized in that: the outer wall of the outer cylinder barrel guide sleeve is fixed on the inner wall of the outer cylinder barrel, and the upper end face of the outer cylinder barrel guide sleeve is in stop fit with the outer cylinder barrel limiting part.
9. The two-stage telescopic cylinder in a preform oil press according to claim 1, characterized in that: and the outer top surface outside the outer cylinder barrel is provided with a pushing piece groove.
10. The two-stage telescopic cylinder in a preform oil press according to claim 1, characterized in that: and an elastic sealing gasket is arranged on the inner top surface inside the outer cylinder barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921253984.9U CN210484242U (en) | 2019-08-05 | 2019-08-05 | Two-stage telescopic oil cylinder in preform oil press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921253984.9U CN210484242U (en) | 2019-08-05 | 2019-08-05 | Two-stage telescopic oil cylinder in preform oil press |
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| Publication Number | Publication Date |
|---|---|
| CN210484242U true CN210484242U (en) | 2020-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921253984.9U Active CN210484242U (en) | 2019-08-05 | 2019-08-05 | Two-stage telescopic oil cylinder in preform oil press |
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| Country | Link |
|---|---|
| CN (1) | CN210484242U (en) |
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2019
- 2019-08-05 CN CN201921253984.9U patent/CN210484242U/en active Active
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