CN210715367U - Bidirectional end unloading speed reducing oil cylinder - Google Patents
Bidirectional end unloading speed reducing oil cylinder Download PDFInfo
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- CN210715367U CN210715367U CN201921712186.8U CN201921712186U CN210715367U CN 210715367 U CN210715367 U CN 210715367U CN 201921712186 U CN201921712186 U CN 201921712186U CN 210715367 U CN210715367 U CN 210715367U
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Abstract
The utility model discloses a two-way tip off-load speed reducing cylinder, including cylinder body, piston rod, protecgulum and hou gai, be equipped with the piston on the piston rod, be equipped with the buffering disk seat on the piston, be equipped with first choked flow hole in the buffering disk seat, be equipped with second choked flow hole and third choked flow hole in the piston, be equipped with the through-hole in the buffering disk seat, the downthehole steel ball that is equipped with of third choked flow, steel ball left end and the cooperation of second choked flow hole, the steel ball right-hand member cushions the through-hole cooperation of disk seat with the right side, be equipped with the buffer beam in the buffering disk seat, sliding connection between buffer beam and the buffering disk seat. The steel ball moves leftwards under the combined action of the buffer rod and the oil pressure, and the moving reliability of the steel ball is good; and meanwhile, when the buffer rod is subjected to external force, the throttling hole can be opened, and when the piston rod of the oil cylinder moves to positions beyond two ends, the throttling hole is in a closed state, so that unloading is prevented from being generated in the operation process of the piston rod.
Description
Technical Field
The utility model belongs to the technical field of the hydro-cylinder technique and specifically relates to a two-way tip off-load deceleration cylinder.
Background
The oil cylinder is a linear motion type actuating element with output force in direct proportion to the effective area of the piston and the pressure difference between the two sides of the piston. Its function is to convert hydraulic energy into mechanical energy. The input of the hydraulic cylinder is the flow and pressure of the fluid, and the output is the linear motion speed and force. However, when the piston rod of the oil cylinder extends and retracts to the two end positions of the cylinder barrel, the reaching speed of the piston and the piston rod is high, the pressure of a hydraulic system is high, and the service life of the oil cylinder is shortened.
The prior application number is 2011202588043, the application date is 20110721, the patent name is a utility model patent of a large-flow high-pressure oil cylinder with an unloading buffer mechanism, the technical scheme is disclosed, the large-flow high-pressure oil cylinder with the unloading buffer mechanism is provided, and an unloading cavity III which penetrates through a piston along the axial direction of the piston is arranged on the piston; in the unloading cavity III, two ends are respectively provided with a plug and a push rod, and a steel ball is arranged between the plug and the push rod; the plug and the push rod are provided with through holes which are axially communicated along the piston; a first limiting step is arranged on the outer peripheral surface of the piston rod and on one side of the unloading cavity III close to the end cover; and a second limiting step is arranged on one side close to the base on the inner peripheral surface of the shaft hole of the end cover. Can effectively eliminate the impact caused by high pressure of high pressure oil, and has the advantages of good unloading effect, high speed and the like.
However, the comparison document has the following problems that 1, the steel ball in the throttling hole is in a floating state, the throttling hole is completely blocked by the hydraulic pressure difference of the two sides of the steel ball, the reliability is poor, the pressure difference of the front cavity and the rear cavity of the oil cylinder in a working state can be changed, 2, the movement of the steel ball is completely completed by the pressure difference of the front cavity and the rear cavity of the oil cylinder, the reliability is poor, 3, the structure is complex, a piston rod and the inner wall of the cylinder body need to be machined, the machining difficulty of the inner wall of the cylinder body.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve above-mentioned problem, provide a two-way tip off-load deceleration cylinder.
The utility model provides a technical scheme that its technical problem adopted is:
a bidirectional end unloading deceleration oil cylinder comprises a cylinder body, a piston rod, a front cover and a rear cover, wherein a piston is arranged on the piston rod, a buffer valve seat is arranged on the piston, the buffer valve seat is symmetrically distributed on two sides of the piston, a first flow blocking hole is arranged in the buffer valve seat, a second flow blocking hole and a third flow blocking hole are arranged in the piston, a through hole is arranged in the buffer valve seat, one end of the outer side of the first flow blocking hole is communicated with an inner cavity of the cylinder body, one end of the inner side of the first flow blocking hole is communicated with the through hole, the second flow blocking hole is communicated with the third flow blocking hole, the left end of the second flow blocking hole is communicated with the through hole of a left buffer valve seat, the right end of the third flow blocking hole is communicated with the through hole of a right buffer valve seat, a steel ball is arranged in the third flow blocking hole, the left end of the steel ball is matched with, one end of the outer side of the buffer rod extends out of the buffer valve seat, and one end of the inner side of the buffer rod is matched with the steel ball.
Furthermore, mounting holes are formed in two sides of the piston, internal threads are formed in the mounting holes, external threads are formed on the buffering valve seat, and the buffering valve seat is connected with the mounting holes through threads.
Further, the first flow blocking hole is uniformly provided in plurality in the circumferential direction of the cushion valve seat.
Further, the diameter of the third flow blocking hole is larger than that of the second flow blocking hole, and the diameter of the third flow blocking hole is larger than that of the through hole.
Furthermore, a limiting head is arranged at one end of the inner side of the buffer rod.
Furthermore, an O-shaped sealing ring is arranged between the buffer valve seat and the mounting hole.
The utility model has the advantages that:
1. the utility model is provided with the buffer rod, one end outside the buffer rod extends out of the buffer valve seat, one end inside the buffer rod is matched with the steel ball, when the piston rod of the oil cylinder extends out of and retracts into the two ends of the cylinder barrel, the steel ball moves leftwards under the combined action of the buffer rod and the oil pressure, and the moving reliability of the steel ball is good; meanwhile, when the buffer rod is acted by external force, the throttling hole can be opened, the pressure difference of the front cavity and the rear cavity can play the role of overload protection through the throttling hole, when the positions of the piston rod of the oil cylinder are out of two ends in operation, the throttling hole is in a closed state, and the pressure difference of the front cavity and the rear cavity of the oil cylinder cannot change; simple structure need not carry out special processing to piston rod and pneumatic cylinder inner wall, reduces the cost.
2. The utility model discloses the inboard one end of well buffer beam is equipped with the stopper, prevents that the buffer beam from dropping in the buffering disk seat, and the good reliability.
3. The utility model discloses well first choked flow hole is equipped with a plurality ofly along buffering disk seat circumferencial direction uniformly, and a plurality of first choked flow holes can increase the off-load flow.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a cross-sectional view of the piston rod of the present invention in a contracted state;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
fig. 3 is a sectional view of the piston of the present invention;
FIG. 4 is a sectional view of the buffering valve seat of the present invention;
FIG. 5 is a left side view of the buffering valve seat of the present invention;
fig. 6 is a cross-sectional view of the piston rod of the present invention in an extended state.
In the figure: the piston type hydraulic cylinder comprises a cylinder body 1, a piston rod 2, a front cover 3, a rear cover 4, a piston 5, a buffering valve seat 6, a mounting hole 7, a first flow blocking hole 8, a second flow blocking hole 9, a third flow blocking hole 10, a through hole 11, a steel ball 12, a buffering rod 13, a limiting head 14 and an O-shaped sealing ring 15.
Detailed Description
In order to make the technical solutions in the present invention better understood, the technical solutions in 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 obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
As shown in fig. 1 and 2, a bidirectional end unloading deceleration cylinder comprises a cylinder body 1, a piston rod 2, a front cover 3 and a rear cover 4, wherein a piston 5 is arranged on the piston rod 2, a buffer valve seat 6 is arranged on the piston 5, the buffer valve seat 6 is symmetrically distributed on two sides of the piston 5, a first flow-blocking hole 8 is arranged in the buffer valve seat 6, a second flow-blocking hole 9 and a third flow-blocking hole 10 are arranged in the piston 5, a through hole 11 is arranged in the buffer valve seat 6, one end of the outer side of the first flow-blocking hole 8 is communicated with an inner cavity of the cylinder body 1, one end of the inner side of the first flow-blocking hole 8 is communicated with the through hole 11, one end of the outer side of the first flow-blocking hole 8 is close to the side surface of the piston 5, one end of the inner side of the first flow-blocking hole 8 is far away from the side surface of the piston 5, the third flow-blocking hole 10 is positioned at the, the second hinders the orifice 9 and hinders the orifice 10 intercommunication with the third, and the second hinders the orifice 9 left end and cushions through-hole 11 intercommunication of disk seat 6 on the left side, and the third hinders the orifice 10 right-hand member and cushions through-hole 11 intercommunication of disk seat 6 on the right side, the third hinders and is equipped with steel ball 12 in the orifice 10, and steel ball 12 left end hinders the orifice 9 cooperation with the second, and steel ball 12 right-hand member and the through-hole 11 cooperation of disk seat 6 on the right side, be equipped with buffer beam 13 in the buffering disk seat 6, sliding connection between buffer beam 13 and the buffering disk seat 6, buffer beam 13 outside one end stretches out buffering disk seat 6, and the inboard one end of buffer beam 13 cooperates with.
When the piston rod of the oil cylinder extends out and retracts to the two ends of the cylinder barrel, the steel ball 12 moves leftwards under the combined action of the buffer rod 13 and oil pressure, and the moving reliability of the steel ball 12 is good; meanwhile, when the buffer rod 13 is acted by external force, the throttling hole can be opened, the pressure difference of the front cavity and the rear cavity can play the role of overload protection through the throttling hole, when the positions of the piston rod of the oil cylinder are out of two ends, the throttling hole is in a closed state, and the pressure difference of the front cavity and the rear cavity of the oil cylinder cannot change; simple structure need not carry out special processing to piston rod and pneumatic cylinder inner wall, reduces the cost.
As shown in fig. 2, 3 and 4, mounting holes 7 are formed in two sides of the piston 5, internal threads are formed in the mounting holes 7, external threads are formed on the buffer valve seat 6, and the buffer valve seat 6 is in threaded connection with the mounting holes 7.
As shown in fig. 5, the first blocking hole 8 is uniformly provided in plural, preferably six in this embodiment, in the circumferential direction of the cushion valve seat 6, and the plural first blocking holes 8 can increase the unloading flow rate.
As shown in fig. 2, the diameter of the third flow-blocking hole 10 is larger than that of the second flow-blocking hole 9, the diameter of the third flow-blocking hole 10 is larger than that of the through hole 11, the limit position of the second flow-blocking hole 9 for limiting the left end of the steel ball 12 is passed through, the limit position of the through hole 11 for limiting the right end of the steel ball 12 is passed through, so that the steel ball 12 can block the second flow-blocking hole 9 and the through hole 11.
As shown in fig. 2, a limiting head 14 is arranged at one end of the inner side of the buffer rod 13, and the limiting position of the buffer rod 13 is limited by the limiting head 14, so that the buffer rod 13 is prevented from falling from the buffer valve seat 6, and the reliability is good.
As shown in fig. 2, an O-ring 15 is provided between the cushion valve seat 6 and the mounting hole 7.
The working principle is as follows: when the piston rod of the oil cylinder retracts to the outer end of the right buffer rod 13 and contacts with the rear cover 4 of the cylinder body component, as shown in fig. 1, the right buffer rod 13 pushes the steel ball to move leftwards under the combined action of continuously increased oil pressure of a rear cavity and the rear cover of the oil cylinder, the steel ball 12 is separated from the through hole 11 of the right buffer valve seat 6 during movement, the gap of the blocked flow-resisting hole is opened, meanwhile, hydraulic oil on the left side of the piston flows to the right side of the piston through the first flow-resisting hole 8, the through hole 11, the second flow-resisting hole 9 and the third flow-resisting hole 10 on the piston speed reducer, the pressure in front of the oil cylinder is rapidly reduced, the unloading speed reduction and overload protection effects of the oil cylinder are effectively; on the contrary, when the end of the cylinder piston rod extending out of the left end buffer rod 13 contacts with the front cover 3 of the cylinder body component, as shown in fig. 6, the left end buffer rod 13 pushes the steel ball to move rightwards under the combined action of the continuously increased oil pressure in the rear cavity and the cylinder front cover 3, the steel ball 12 is separated from the second flow blocking hole 9 during movement, the blocked flow blocking hole gap is opened, meanwhile, the hydraulic oil on the right side of the piston flows to the left side of the piston through the first flow blocking hole 8, the through hole 11, the second flow blocking hole 9 and the third flow blocking hole 10 on the piston speed reducer, the pressure in the rear cavity of the cylinder is rapidly reduced, the unloading and deceleration and overload protection effects of the cylinder are effectively released at the moment, and the hydraulic system is effectively protected.
When the piston rod of the oil cylinder extends out of and retracts into the two end positions of the cylinder barrel, the speed of the piston and the piston rod to the two end positions of the cylinder barrel can be reduced, and simultaneously, oil in the gap of the flow blocking hole on the piston speed reducing device flows from the high pressure cavity to the low pressure cavity at the two ends of the piston, so that the purposes of speed reduction and unloading are achieved, and the overload protection effect on the pressure of an oil inlet pipe and a hydraulic system is further achieved.
In the description of the present invention, it should be noted that the terms "left", "right", "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
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; they may be mechanically or electrically connected, directly or indirectly through intervening media, or 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.
Claims (6)
1. A bidirectional end unloading deceleration oil cylinder comprises a cylinder body (1), a piston rod (2), a front cover (3) and a rear cover (4), wherein a piston (5) is arranged on the piston rod (2), and is characterized in that a buffering valve seat (6) is arranged on the piston (5), the buffering valve seat (6) is symmetrically distributed on two sides of the piston (5), a first flow blocking hole (8) is arranged in the buffering valve seat (6), a second flow blocking hole (9) and a third flow blocking hole (10) are arranged in the piston (5), a through hole (11) is arranged in the buffering valve seat (6), one end of the outer side of the first flow blocking hole (8) is communicated with an inner cavity of the cylinder body (1), one end of the inner side of the first flow blocking hole (8) is communicated with the through hole (11), the second flow blocking hole (9) is communicated with the third flow blocking hole (10), and the left end of the second flow blocking hole (9) is communicated with the through hole (, the third hinders through-hole (11) intercommunication of discharge orifice (10) right-hand member and right side buffering disk seat (6), the third hinders and is equipped with steel ball (12) in discharge orifice (10), and steel ball (12) left end and second hinder discharge orifice (9) cooperation, and steel ball (12) right-hand member and through-hole (11) cooperation of right side buffering disk seat (6), be equipped with buffer beam (13) in buffering disk seat (6), sliding connection between buffer beam (13) and buffering disk seat (6), buffer beam (13) outside one end stretches out buffering disk seat (6), and buffer beam (13) inboard one end cooperates with steel ball (12).
2. The bidirectional end unloading deceleration cylinder as recited in claim 1, characterized in that the two sides of the piston (5) are provided with mounting holes (7), the mounting holes (7) are internally provided with internal threads, the cushion valve seat (6) is provided with external threads, and the cushion valve seat (6) is connected with the mounting holes (7) through threads.
3. The bidirectional end-unloading deceleration cylinder according to claim 1, wherein the first orifice (8) is uniformly provided in plurality in the circumferential direction of the cushion valve seat (6).
4. The bidirectional end-unloading deceleration cylinder according to claim 1, wherein the diameter of the third choke hole (10) is larger than that of the second choke hole (9), and the diameter of the third choke hole (10) is larger than that of the through hole (11).
5. The bidirectional end-unloading deceleration cylinder as recited in claim 1, characterized in that a stopper (14) is provided at one end of the inside of the buffer rod (13).
6. A two-way end-unloading deceleration cylinder according to claim 1, characterized in that an O-ring (15) is arranged between the cushion valve seat (6) and the mounting hole (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921712186.8U CN210715367U (en) | 2019-10-12 | 2019-10-12 | Bidirectional end unloading speed reducing oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921712186.8U CN210715367U (en) | 2019-10-12 | 2019-10-12 | Bidirectional end unloading speed reducing oil cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN210715367U true CN210715367U (en) | 2020-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921712186.8U Active CN210715367U (en) | 2019-10-12 | 2019-10-12 | Bidirectional end unloading speed reducing oil cylinder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339344A (en) * | 2020-08-05 | 2021-09-03 | 博世汽车转向***（济南）有限公司 | Relief valve reaches hydraulic pressure power assisted steering ware including it |
| CN116175717A (en) * | 2022-11-29 | 2023-05-30 | 苏州艾维科斯园林设备有限公司 | Bidirectional rapid energy-saving efficient hydraulic log splitter |
-
2019
- 2019-10-12 CN CN201921712186.8U patent/CN210715367U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339344A (en) * | 2020-08-05 | 2021-09-03 | 博世汽车转向***（济南）有限公司 | Relief valve reaches hydraulic pressure power assisted steering ware including it |
| CN116175717A (en) * | 2022-11-29 | 2023-05-30 | 苏州艾维科斯园林设备有限公司 | Bidirectional rapid energy-saving efficient hydraulic log splitter |
| CN116175717B (en) * | 2022-11-29 | 2023-11-14 | 苏州艾维科斯园林设备有限公司 | Bidirectional rapid energy-saving efficient hydraulic log splitter |
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