CN212360368U - Mechanical self-locking hydraulic oil cylinder - Google Patents
Mechanical self-locking hydraulic oil cylinder Download PDFInfo
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- CN212360368U CN212360368U CN202022252578.XU CN202022252578U CN212360368U CN 212360368 U CN212360368 U CN 212360368U CN 202022252578 U CN202022252578 U CN 202022252578U CN 212360368 U CN212360368 U CN 212360368U
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- ball screw
- piston rod
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- balls
- fixture block
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Abstract
The utility model relates to a mechanical self-locking hydraulic oil cylinder, a piston rod is a hollow rod, and a ball screw is coaxially arranged in the cavity of the piston rod; the external thread connecting part of the piston rod is symmetrically provided with clamping grooves, the clamping sleeve is symmetrically provided with an upper clamping block and a lower clamping block, the upper clamping block and the lower clamping block are respectively clamped in the clamping grooves, and the piston and the clamping sleeve are tightly pressed on the piston rod through nut threads; the inner sides of the upper fixture block and the lower fixture block are respectively rotatably provided with at least 2 axially distributed balls, the ball screw is symmetrically provided with two axial V-shaped grooves, and the balls in the upper fixture block and the lower fixture block are respectively clamped in the V-shaped grooves on the ball screw; the stop block is fixedly arranged in the accommodating cavity of the cylinder bottom cover, the ball screw is fixedly provided with a movable stop block corresponding to the stop block, and two ends of the arc-shaped spring piece respectively abut against the movable stop block and the stop block. The utility model discloses simple structure is compact, and low in manufacturing cost realizes the locking of the full stroke of hydraulic cylinder's piston rod, stability and the reliability that reinforcing hydraulic cylinder used.
Description
Technical Field
The utility model relates to a hydraulic cylinder especially relates to a mechanical type auto-lock hydraulic cylinder.
Background
The hydraulic oil cylinder is a device driven by hydraulic oil to output power, and mainly comprises a cylinder barrel, a piston rod and the like, and when the hydraulic oil cylinder works, the piston and the piston rod are pushed to move by the hydraulic oil. In some working occasions, when a piston rod extends to a certain position, the hydraulic oil cylinder needs to be kept in the state for a long time, usually, a hydraulic system adopts a one-way valve, a hydraulic lock and other hydraulic actuating elements to realize self-locking, but the hydraulic system is difficult to avoid leakage, so that the piston rod is displaced, and the state is difficult to be kept for a long time. In order to solve the above problems, at present, a mode of adding a mechanical self-locking mechanism is usually adopted in a hydraulic oil cylinder to enhance the reliability of locking of the hydraulic oil cylinder, but most of the existing mechanical self-locking mechanisms can only realize locking when a piston rod is in a fully extended or retracted state, and cannot realize locking of the full stroke of the piston rod of the hydraulic oil cylinder.
SUMMERY OF THE UTILITY MODEL
The applicant researches and improves aiming at the problems, and provides a mechanical self-locking hydraulic oil cylinder which is simple and compact in structure and low in manufacturing cost, realizes the locking of the full stroke of a piston rod of the hydraulic oil cylinder, avoids the phenomenon that the piston rod is displaced due to the leakage of a hydraulic system, and enhances the stability and the reliability of the hydraulic oil cylinder in use.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a mechanical self-locking hydraulic oil cylinder comprises a cylinder barrel, wherein two ends of the cylinder barrel are sealed by a guide sleeve and a cylinder bottom cover, a piston is arranged in the cylinder barrel in a sliding mode, the inner end of a piston rod is fixedly connected with the piston, the outer end of the piston rod penetrates through a guide hole of the guide sleeve and extends outwards, the piston divides an inner cavity of the cylinder barrel into a rod cavity and a rodless cavity, the piston rod is a hollow rod with a sealed outer end, a ball screw is coaxially arranged in the hollow cavity of the piston rod, the ball screw extends out of the cylinder bottom cover, and the ball screw is rotatably and hermetically connected with the cylinder bottom cover; the inner end of the piston rod is provided with an external thread connecting part, the external thread connecting part of the piston rod is symmetrically provided with clamping grooves, a clamping sleeve is sleeved on the external thread connecting part of the piston rod, an upper clamping block and a lower clamping block are symmetrically arranged on the clamping sleeve, the upper clamping block and the lower clamping block are respectively clamped in the clamping grooves, and a nut is in threaded connection with the external thread connecting part of the piston rod and tightly presses the piston and the clamping sleeve on the piston rod; the inner sides of the upper fixture block and the lower fixture block are respectively rotatably provided with at least 2 balls distributed axially, the distance between the balls is 1 lead of the ball screw, the balls in the upper fixture block and the balls in the lower fixture block are arranged in a staggered manner, the staggered distance between the balls in the upper fixture block and the balls in the lower fixture block is one half lead of the ball screw, the ball screw is symmetrically provided with two axial V-shaped grooves, and the balls in the upper fixture block and the lower fixture block are respectively clamped in the V-shaped grooves on the ball screw; the cylinder bottom cover is provided with an accommodating cavity, the end cover is fixedly connected with the cylinder bottom cover, a fan-shaped stop block is fixedly arranged in the accommodating cavity of the cylinder bottom cover, a fan-shaped movable stop block corresponding to the stop block is fixedly arranged on the ball screw, two ends of an arc-shaped spring piece arranged in the accommodating cavity are respectively abutted against the movable stop block and the stop block, and an axial clearance between the movable stop block and the bottom surface of the accommodating cavity and between the movable stop block and the end cover is 1 lead of the ball screw; the ball screw extends out of the end cover, and a handle arranged in the radial direction is fixedly connected with the ball screw.
Further:
the handle is characterized in that the end cover is provided with a support and a lock frame, one end of a lock plate of the handle is rotatably connected with the support, the other end of the lock plate is provided with a first through hole, the lock frame is provided with a second through hole, and the middle of the lock plate is provided with a V-shaped groove.
The inner sides of the upper clamping block and the lower clamping block are respectively and rotatably provided with 2 balls which are distributed axially.
The technical effects of the utility model reside in that:
the utility model discloses a mechanical type auto-lock hydraulic cylinder, simple structure is compact, and low in manufacturing cost realizes the locking of the full stroke of hydraulic cylinder's piston rod, avoids making the phenomenon of piston rod displacement appear because of hydraulic system leaks, stability and the reliability that reinforcing hydraulic cylinder used.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a sectional view taken at a-a of fig. 1.
Fig. 3 is a sectional view taken at B-B of fig. 1.
Fig. 4 is a view in the direction C of fig. 1.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
As shown in fig. 1-4, the utility model discloses a cylinder 3, the both ends of cylinder 3 are sealed by uide bushing 2 and cylinder bottom cover 9, piston 5 slides and sets up in cylinder 3, the inner and 5 fixed connection of piston rod 1, the guide hole that uide bushing 2 was passed to the outer end of piston rod 1 is outwards stretched out, piston 5 falls into the inner chamber of cylinder 3 has pole chamber and no pole chamber, piston rod 1 is outer end confined cavity pole, ball 4 coaxial settings are in the hollow cavity of piston rod 1, ball 4 extends cylinder bottom cover 9, and ball 4 and the rotatable sealing connection of cylinder bottom cover 9. The inner of the piston rod 1 is provided with an external thread connecting portion, the external thread connecting portions of the piston rod 1 are symmetrically provided with clamping grooves 101, the clamping sleeve 7 is an annular component, the clamping sleeve 7 is sleeved on the external thread connecting portion of the piston rod 1, an upper clamping block 71 and a lower clamping block 72 are symmetrically arranged on the clamping sleeve 7, the upper clamping block 71 and the lower clamping block 72 are respectively clamped in the clamping grooves 101, and a nut 8 is in threaded connection with the external thread connecting portion of the piston rod 1 and tightly presses the piston 5 and the clamping sleeve 7 on. The inner sides of the upper fixture block 71 and the lower fixture block 72 are respectively rotatably provided with at least 2 balls 6 distributed axially, the distance D between the balls 6 is 1 lead of the ball screw 4, the balls 6 in the upper fixture block 71 and the balls 6 in the lower fixture block 72 are arranged in a staggered manner, the staggered distance E between the balls 6 in the upper fixture block 71 and the balls 6 in the lower fixture block 72 is one half lead of the ball screw 4, the ball screw 4 is symmetrically provided with two axial V-shaped grooves 42, and the balls 6 in the upper fixture block 71 and the lower fixture block 72 are respectively clamped in the V-shaped grooves 42 on the ball screw 4. The number of the balls 6 can be determined according to actual needs, and in the present embodiment, 2 axially distributed balls 6 are respectively rotatably disposed on the inner sides of the upper fixture block 71 and the lower fixture block 72. The cylinder bottom cover 9 is provided with an accommodating cavity 91, the end cover 15 is fixedly connected with the cylinder bottom cover 9, the fan-shaped stop block 10 is fixedly arranged in the accommodating cavity 91 of the cylinder bottom cover 9, the ball screw 4 is fixedly provided with the fan-shaped movable stop block 41 corresponding to the stop block 10, two ends of the arc-shaped spring piece 16 arranged in the accommodating cavity 91 respectively abut against the movable stop block 41 and the stop block 10, and when the hydraulic oil cylinder is in a working state, the movable stop block 41 keeps abutting against the stop block 10 under the elastic force action of the arc-shaped spring piece 16. The axial gap G provided between the movable stopper 41 and the bottom surface of the housing chamber 91 and the end cap 15 is 1 lead of the ball screw 4, that is, the movable stopper 41 has a floating amount of 1 lead of the ball screw 4 in the axial direction. The ball screw 4 extends out of the end cover 15, and the handle 12 arranged in the radial direction is fixedly connected with the ball screw 4.
When the hydraulic oil cylinder is in a working state, as shown in fig. 1, 2 and 3, the movable stopper 41 is kept to abut against the stopper 10 under the elastic force of the arc-shaped spring piece 16, at this time, the balls 6 in the upper and lower fixture blocks 71 and 72 are respectively clamped in the V-shaped grooves 42 on the ball screw 4, and since the V-shaped grooves 42 are in the axial direction, the axial telescopic motion of the piston 5 and the piston rod 1 under the action of pressure oil is not affected. When the piston 5 and the piston rod 1 stop at a certain position, the rod cavity and the rodless cavity of the cylinder barrel 3 are not pressurized any more, and hydraulic self-locking is realized by hydraulic actuating elements such as a one-way valve, a hydraulic lock and the like of a hydraulic system. If the piston 5 and the piston rod 1 need to be locked at the position for a long time, the handle 12 is rotated clockwise (as shown in fig. 4), so that the balls 6 in the upper fixture block 71 and the lower fixture block 72 enter the spiral raceway of the ball screw 4 (meanwhile, the movable stopper 41 overcomes the elastic force of the arc-shaped spring piece 16 and is separated from the stopper 10), if the position of the ball 6 is just dislocated with the spiral raceway of the ball screw 4, because the movable stopper 41 of the ball screw 4 leaves an axial gap G in the accommodating cavity 91, the handle 12 can be rotated while the handle 12 is pulled axially, so that the ball 6 enters the spiral raceway of the ball screw 4, and the handle 12 is rotated to a horizontal position, and because the ball screw 4 blocks the balls 6, the positions of the piston 5 and the piston rod 1 are locked, and thus, the mechanical locking of the hydraulic oil cylinder is realized. In order to ensure the stability of the mechanical locking state, in this embodiment, the end cap 15 is provided with a bracket 14 and a lock frame 11, one end of a lock plate 13 for locking the handle 12 is rotatably connected to the bracket 14, the other end of the lock plate 13 is provided with a first through hole 132, the lock frame 11 is provided with a second through hole 111, and the middle of the lock plate 13 is provided with a V-shaped groove 131. When the hydraulic oil cylinder enters a mechanical locking state, the locking plate 13 is rotated, the V-shaped groove 131 in the middle of the locking plate 13 is clamped into the handle 12, the first through hole 132 in the locking plate 13 is aligned with the second through hole 111 in the lock frame 11, and the clamping pin is inserted, so that the handle 12 is ensured not to move any more, and the mechanical locking state of the hydraulic oil cylinder is ensured to be stable. When the unlocking is needed, the locking plate 13 is opened, the handle 12 is rotated reversely to drive the movable stop block 41 to return to abut against the stop block 10, so that the ball screw 4 returns to the initial position and returns to the working state again.
The utility model discloses on the basis of hydraulic system auto-lock, increase mechanical auto-lock to realize the locking of the full stroke of hydraulic cylinder's piston rod, avoid making the piston rod the phenomenon of displacement appear because of hydraulic system leaks, stability and the reliability that reinforcing hydraulic cylinder used.
Claims (3)
1. The utility model provides a mechanical type auto-lock hydraulic cylinder, includes the cylinder, the both ends of cylinder are sealed by uide bushing and cylinder bottom lid, and the piston slides and sets up in the cylinder, the inner of piston rod with piston fixed connection, the outer end of piston rod passes the guide hole of uide bushing is outwards stretched out, the piston will the inner chamber of cylinder divide into has pole chamber and no pole chamber, its characterized in that: the piston rod is a hollow rod with a closed outer end, the ball screw is coaxially arranged in the hollow cavity of the piston rod, the ball screw extends out of the cylinder bottom cover, and the ball screw is rotatably and hermetically connected with the cylinder bottom cover; the inner end of the piston rod is provided with an external thread connecting part, the external thread connecting part of the piston rod is symmetrically provided with clamping grooves, a clamping sleeve is sleeved on the external thread connecting part of the piston rod, an upper clamping block and a lower clamping block are symmetrically arranged on the clamping sleeve, the upper clamping block and the lower clamping block are respectively clamped in the clamping grooves, and a nut is in threaded connection with the external thread connecting part of the piston rod and tightly presses the piston and the clamping sleeve on the piston rod; the inner sides of the upper fixture block and the lower fixture block are respectively rotatably provided with at least 2 balls distributed axially, the distance between the balls is 1 lead of the ball screw, the balls in the upper fixture block and the balls in the lower fixture block are arranged in a staggered manner, the staggered distance between the balls in the upper fixture block and the balls in the lower fixture block is one half lead of the ball screw, the ball screw is symmetrically provided with two axial V-shaped grooves, and the balls in the upper fixture block and the lower fixture block are respectively clamped in the V-shaped grooves on the ball screw; the cylinder bottom cover is provided with an accommodating cavity, the end cover is fixedly connected with the cylinder bottom cover, a fan-shaped stop block is fixedly arranged in the accommodating cavity of the cylinder bottom cover, a fan-shaped movable stop block corresponding to the stop block is fixedly arranged on the ball screw, two ends of an arc-shaped spring piece arranged in the accommodating cavity are respectively abutted against the movable stop block and the stop block, and an axial clearance between the movable stop block and the bottom surface of the accommodating cavity and between the movable stop block and the end cover is 1 lead of the ball screw; the ball screw extends out of the end cover, and a handle arranged in the radial direction is fixedly connected with the ball screw.
2. The mechanical self-locking hydraulic cylinder according to claim 1, characterized in that: the handle is characterized in that the end cover is provided with a support and a lock frame, one end of a lock plate of the handle is rotatably connected with the support, the other end of the lock plate is provided with a first through hole, the lock frame is provided with a second through hole, and the middle of the lock plate is provided with a V-shaped groove.
3. The mechanical self-locking hydraulic cylinder according to claim 1, characterized in that: the inner sides of the upper clamping block and the lower clamping block are respectively and rotatably provided with 2 balls which are distributed axially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022252578.XU CN212360368U (en) | 2020-10-12 | 2020-10-12 | Mechanical self-locking hydraulic oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022252578.XU CN212360368U (en) | 2020-10-12 | 2020-10-12 | Mechanical self-locking hydraulic oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212360368U true CN212360368U (en) | 2021-01-15 |
Family
ID=74143649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022252578.XU Active CN212360368U (en) | 2020-10-12 | 2020-10-12 | Mechanical self-locking hydraulic oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212360368U (en) |
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2020
- 2020-10-12 CN CN202022252578.XU patent/CN212360368U/en active Active
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