CN215486937U - Adjustable buffering swing hydraulic cylinder for electro-hydraulic actuator - Google Patents
Adjustable buffering swing hydraulic cylinder for electro-hydraulic actuator Download PDFInfo
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- CN215486937U CN215486937U CN202022928270.2U CN202022928270U CN215486937U CN 215486937 U CN215486937 U CN 215486937U CN 202022928270 U CN202022928270 U CN 202022928270U CN 215486937 U CN215486937 U CN 215486937U
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Abstract
The utility model discloses an adjustable buffer swing hydraulic cylinder for an electro-hydraulic actuator, which comprises: the gear box, be equipped with the gear of taking the keyhole in the gear box, the cylinder is installed respectively to the both sides of gear box, all be equipped with two pistons and a rack in every cylinder, two racks all mesh with the gear mutually, be equipped with the oilhole on the both ends of every cylinder respectively, all be equipped with the cushion collar on the both ends bottom of every cylinder inner chamber, all be equipped with the buffering boss on the outer end of two pistons in every cylinder, all be equipped with damping hole and smooth orifice on every cushion collar, a port of damping hole is located the terminal surface of cushion collar, another port of damping hole links to each other with the oilhole through the pipeline of taking one-way throttle valve, a port of smooth orifice is located the inside wall of cushion collar, another port of smooth orifice links to each other with the oilhole through the pipeline. The adjustable buffer mechanism is added to the swing hydraulic cylinder, so that the speed of the piston which is reduced when being buffered can be adjusted.
Description
Technical Field
The utility model relates to the field of electro-hydraulic actuators, in particular to a buffer-adjustable swing hydraulic cylinder for an electro-hydraulic actuator.
Background
The conventional swing hydraulic cylinder is basically used in the occasion of low-speed rotation, and if the conventional swing hydraulic cylinder is used in the occasion of high-speed rotation, because of the limitation of a rotation angle, the inertia force value is huge at the moment that a piston collides with the bottom of a cylinder barrel, and if no buffer structure is provided, the swing hydraulic cylinder can be damaged or a driven part of the swing hydraulic cylinder can be damaged. The traditional swing hydraulic cylinder is not provided with a buffer mechanism at the stroke end or is provided with the buffer mechanism, but the buffer speed is not adjustable, so that the situation that the high-speed rotation stroke end of the gear is buffered or the working condition that the end buffering needs to be adjustable cannot be better met.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is as follows: an adjustable damping pendulum cylinder for an electro-hydraulic actuator is to be provided.
In order to solve the problems, the technical scheme adopted by the utility model is as follows: an adjustable damping pendulum cylinder for an electro-hydraulic actuator, comprising: a gear box, a gear with a keyhole is arranged in the gear box, the keyhole can be inserted by a valve shaft, so that the gear can control the valve by driving the valve shaft to rotate, a cylinder is respectively arranged at the upper part and the lower part of the gear box, the middle parts of the two cylinders are communicated with the gear box, each cylinder is internally provided with two pistons and a cylindrical rack positioned between the two pistons, the two racks are respectively meshed with the gear through the communication part of the cylinder and the gear box for transmission, oil holes communicated with the inner cavity of the cylinder are respectively arranged at the two ends of each cylinder, pressure oil can drive the piston at one end of the cylinder to push the rack and the other piston to move towards the other end of the cylinder after being introduced into one end of the cylinder through the oil holes, so that the rack can drive the gear to rotate, and the other piston can press the oil in the other end of the cylinder out of the cylinder through the oil hole at the other end of the cylinder, two oilholes on every cylinder all lead to oil in turn like this and just can drive gear just positive and negative rotation after two racks are opposite direction's reciprocating motion, its characterized in that: the bottom of two ends of each cylinder barrel cavity is provided with a buffer sleeve facing a piston, the outer ends of two pistons in each cylinder barrel are respectively provided with a buffer boss facing the buffer sleeve at the end where the two pistons are located, each buffer boss is formed by coaxially connecting a circular table section and a cylindrical section located on the inner side of the circular table section, the small end of the circular table section is located on the outer side, the diameter of the cylindrical section is equal to the diameter of the large end of the circular table section, the cylindrical section is fixed with the piston, each buffer sleeve is provided with a damping hole and an open flow hole, one port of the damping hole is located on the end face of the buffer sleeve and communicated with the cylinder barrel cavity, the other port of the damping hole is communicated with an oil hole at the end of the damping hole through a pipeline with a one-way throttle valve, the one-way throttle valve can throttle oil flowing from the damping hole to the oil hole, and one port of the open flow hole is located on the inner ring side wall of the buffer sleeve and communicated with the cylinder barrel cavity, the other port of the smooth flow hole is communicated with the oil hole at the end of the smooth flow hole through a pipeline, an inner ring sealing ring positioned at the inner side of the smooth flow hole is arranged on the side wall of the inner ring of each buffer sleeve, when the piston moves to the end part of the cylinder barrel, the buffer boss on the piston can be inserted into the corresponding buffer sleeve, so that the circular platform section on the buffer boss can gradually reduce the through-flow section of the inner ring of the buffer sleeve along with the insertion, thereby reducing the oil flowing out from the smooth flow hole, playing a role of buffering the speed of the piston, when the cylindrical section on the buffer boss is inserted into the buffer sleeve, the inner ring sealing ring can seal the gap between the cylindrical section and the buffer sleeve, so that the oil cannot flow out through the smooth flow hole, and the oil can only flow out from the damping hole, thus limiting the flow of the oil through the one-way throttle valve and playing a role of buffering the speed of the piston, and the throttle opening degree of the one-way throttle valve is adjustable, so that the speed of the piston speed reduction can be adjusted.
Further, the aforementioned adjustable damping swing hydraulic cylinder for an electro-hydraulic actuator, wherein: the open flow hole is an L-shaped hole.
Further, the aforementioned adjustable damping swing hydraulic cylinder for an electro-hydraulic actuator, wherein: the one-way throttle valve is provided with a manual knob positioned on the outer side, and the throttle opening of the one-way throttle valve can be conveniently adjusted by rotating the manual knob.
Further, the aforementioned adjustable damping swing hydraulic cylinder for an electro-hydraulic actuator, wherein: and a sealing ring is arranged between the buffer sleeve and the side wall of the cylinder barrel.
The utility model has the advantages that: the adjustable buffer mechanism is additionally arranged on the swing hydraulic cylinder, so that the speed of the piston which is reduced when the piston is buffered can be adjusted, and the swing hydraulic cylinder can be more suitable for occasions with high-speed rotation and can be used for the working condition that the tail end buffering needs to be adjusted.
Drawings
Fig. 1 is a schematic structural diagram of an adjustable damping swing hydraulic cylinder for an electro-hydraulic actuator according to the present invention.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments and the attached drawings.
As shown in fig. 1, an adjustable damping swing cylinder for an electro-hydraulic actuator includes: a gear box 1, a gear 2 with a keyhole is arranged in the gear box 1, the keyhole can be inserted by a valve shaft, the gear 2 can control the valve by driving the valve shaft to rotate, a cylinder 3 is respectively arranged at the upper part and the lower part of the gear box 1, the middle parts of the two cylinders 3 are communicated with the gear box 1, each cylinder 3 is provided with two pistons 4 and a cylindrical rack 5 positioned between the two pistons 4, the two racks 5 are respectively engaged with the gear 2 through the communication part of the cylinder 3 and the gear box 1, oil holes 6 communicated with the inner cavity of the cylinder 3 are respectively arranged at the two ends of each cylinder 3, pressure oil can drive the piston 4 at the end to push the rack 5 and the other piston 4 to move towards the other end of the cylinder 3 after being introduced into one end of the cylinder 3 through the oil holes 6, so that the rack 5 can drive the gear 2 to rotate, The other piston 4 can press the oil in the other end of the cylinder barrel 3 out of the cylinder barrel 3 through the oil hole 6 at the end where the other piston is located, so that the two oil holes 6 on each cylinder barrel 3 are alternately filled with the oil to enable the two racks 5 to do reciprocating motion in opposite directions so as to drive the gear 2 to rotate in the positive direction and the negative direction, the bottom parts of the two ends of the inner cavity of each cylinder barrel 3 are respectively provided with a buffer sleeve 7 facing the piston 4, the outer ends of the two pistons 4 in each cylinder barrel 3 are respectively provided with a buffer boss 8 facing the buffer sleeve 7 at the end where the two racks are located, each buffer boss 8 is formed by coaxially connecting a circular platform section 81 and a cylindrical section 82 located on the inner side of the circular platform section 81, the small end of the circular platform section 81 is located on the outer side, the diameter of the cylindrical section 82 is equal to the diameter of the large end of the circular platform section 81, the cylindrical section 82 is fixed with the piston 4, each buffer sleeve 7 is provided with a damping hole 71 and an open flow hole 72, one port of the damping hole 71 is located on the end face of the buffer sleeve 7 and communicated with the inner cavity of the cylinder barrel 3, the other port of the damping hole 71 is communicated with the oil hole 6 at the end thereof through a pipeline with a one-way throttle valve 9, the one-way throttle valve 9 can throttle oil flowing from the damping hole 71 to the oil hole 6, one port of the flow opening hole 72 is positioned on the inner ring side wall of the cushion sleeve 7 and is communicated with the inner cavity of the cylinder barrel 3, the other port of the flow opening hole 72 is communicated with the oil hole 6 at the end thereof through a pipeline, a sleeve inner sealing ring 73 positioned at the inner side of the flow opening hole 72 is arranged on the inner ring side wall of each cushion sleeve 7, when the piston 4 moves to the end part of the cylinder barrel 3, the cushion boss 8 on the piston 4 can be inserted into the corresponding cushion sleeve 7, so that the circular platform section 81 on the cushion boss 8 can gradually reduce the flow cross section of the inner ring of the cushion sleeve 7 along with the insertion, thereby reducing the oil flowing out from the flow opening hole 72, and playing a role of reducing the speed of the piston 4, when the cylindrical section 82 on the buffering boss 8 is inserted into the buffering sleeve 7, the inner sealing ring 73 can seal the gap between the cylindrical section 82 and the buffering sleeve 7, so that oil cannot flow out through the smooth hole 72, and the oil can only flow out from the damping hole 71, so that the flow of the oil can be limited through the one-way throttle valve 9 to play a role in buffering the speed of the piston 4, and the speed of the piston 4 can be adjusted due to the adjustable throttle opening of the one-way throttle valve 9, namely the buffering speed can be adjusted.
In the present embodiment, the flow opening hole 72 is an L-shaped hole, which is relatively easy to machine. The one-way throttle valve 9 is provided with a manual knob 91 positioned at the outer side, and the throttle opening of the one-way throttle valve 9 can be conveniently adjusted by rotating the manual knob 91. And a sealing ring is arranged between the buffer sleeve 7 and the side wall of the cylinder barrel 3, so that oil leakage can be prevented.
Claims (4)
1. An adjustable damping pendulum cylinder for an electro-hydraulic actuator, comprising: a gear box, a gear with a keyhole is arranged in the gear box, the keyhole can be inserted by a valve shaft, so that the gear can control the valve by driving the valve shaft to rotate, a cylinder is respectively arranged at the upper part and the lower part of the gear box, the middle parts of the two cylinders are communicated with the gear box, each cylinder is internally provided with two pistons and a cylindrical rack positioned between the two pistons, the two racks are respectively meshed with the gear through the communication part of the cylinder and the gear box for transmission, oil holes communicated with the inner cavity of the cylinder are respectively arranged at the two ends of each cylinder, pressure oil can drive the piston at one end of the cylinder to push the rack and the other piston to move towards the other end of the cylinder after being introduced into one end of the cylinder through the oil holes, so that the rack can drive the gear to rotate, and the other piston can press the oil in the other end of the cylinder out of the cylinder through the oil hole at the other end of the cylinder, two oilholes on every cylinder all lead to oil in turn like this and just can drive gear just positive and negative rotation after two racks are opposite direction's reciprocating motion, its characterized in that: the bottom of two ends of each cylinder barrel cavity is provided with a buffer sleeve facing a piston, the outer ends of two pistons in each cylinder barrel are respectively provided with a buffer boss facing the buffer sleeve at the end where the two pistons are located, each buffer boss is formed by coaxially connecting a circular table section and a cylindrical section located on the inner side of the circular table section, the small end of the circular table section is located on the outer side, the diameter of the cylindrical section is equal to the diameter of the large end of the circular table section, the cylindrical section is fixed with the piston, each buffer sleeve is provided with a damping hole and an open flow hole, one port of the damping hole is located on the end face of the buffer sleeve and communicated with the cylinder barrel cavity, the other port of the damping hole is communicated with an oil hole at the end of the damping hole through a pipeline with a one-way throttle valve, the one-way throttle valve can throttle oil flowing from the damping hole to the oil hole, and one port of the open flow hole is located on the inner ring side wall of the buffer sleeve and communicated with the cylinder barrel cavity, the other port of the smooth flow hole is communicated with the oil hole at the end of the smooth flow hole through a pipeline, and an inner ring sealing ring positioned on the inner side of the smooth flow hole is arranged on the side wall of the inner ring of each buffer sleeve.
2. The adjustably cushioned swing cylinder for an electro-hydraulic actuator of claim 1, wherein: the open flow hole is an L-shaped hole.
3. The adjustably cushioned swing cylinder for an electro-hydraulic actuator of claim 1, wherein: the one-way throttle valve is provided with a manual knob positioned on the outer side, and the throttle opening of the one-way throttle valve can be conveniently adjusted by rotating the manual knob.
4. The adjustably cushioned swing cylinder for an electro-hydraulic actuator of claim 1, wherein: and a sealing ring is arranged between the buffer sleeve and the side wall of the cylinder barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022928270.2U CN215486937U (en) | 2020-12-09 | 2020-12-09 | Adjustable buffering swing hydraulic cylinder for electro-hydraulic actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022928270.2U CN215486937U (en) | 2020-12-09 | 2020-12-09 | Adjustable buffering swing hydraulic cylinder for electro-hydraulic actuator |
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| CN215486937U true CN215486937U (en) | 2022-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022928270.2U Active CN215486937U (en) | 2020-12-09 | 2020-12-09 | Adjustable buffering swing hydraulic cylinder for electro-hydraulic actuator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115045889A (en) * | 2022-08-15 | 2022-09-13 | 烟台山河液压部件有限公司 | Shock attenuation hydraulic cylinder |
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2020
- 2020-12-09 CN CN202022928270.2U patent/CN215486937U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115045889A (en) * | 2022-08-15 | 2022-09-13 | 烟台山河液压部件有限公司 | Shock attenuation hydraulic cylinder |
| CN115045889B (en) * | 2022-08-15 | 2022-10-25 | 烟台山河液压部件有限公司 | Shock attenuation hydraulic cylinder |
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