CN209838837U - Hydraulic cylinder with two locking positions - Google Patents
Hydraulic cylinder with two locking positions Download PDFInfo
- Publication number
- CN209838837U CN209838837U CN201920672038.1U CN201920672038U CN209838837U CN 209838837 U CN209838837 U CN 209838837U CN 201920672038 U CN201920672038 U CN 201920672038U CN 209838837 U CN209838837 U CN 209838837U
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- Prior art keywords
- self
- locking
- hydraulic cylinder
- bottom plate
- upper cover
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- Withdrawn - After Issue
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- 238000000034 method Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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Abstract
The utility model provides a hydraulic cylinder with two locking positions, which comprises a hydraulic cylinder and a self-locking device, wherein the self-locking device is that a screw rod type self-locking shaft passes through the shaft holes of an upper cover plate and a bottom plate, a pair of nut type upper and lower positioning locks are screwed on the self-locking shaft, and the outer surface of each positioning lock is provided with a circle of clamping grooves; the left and right opposite-clamping type snap rings are respectively arranged at two sides of the shaft hole of the bottom plate, each snap ring is in a quadrilateral frame shape, one side opposite to the screw rod is in a concave semicircular shape, the rest three sides are in a door frame shape, an adjusting bolt is arranged at the edge of the top frame, a tension spring hook is arranged at each side frame edge, and a tension spring is arranged on the two tension spring hooks at the same side of the pair of snap rings; a plunger oil cylinder is arranged in four side frames of each clamping ring, and each plunger oil cylinder is fixed on the bottom plate; the upper cover plate covers the bottom plate; the piston rod of the hydraulic cylinder, the coupler and the self-locking shaft are sequentially connected, and the hydraulic cylinder, the connecting support and the upper cover plate are sequentially connected.
Description
Technical Field
The utility model relates to a pneumatic cylinder, the pneumatic cylinder that has two latched positions specifically says so.
Background
Hydraulic technology has been widely used in engineering machinery, metallurgy, petrochemical industry and other industries, and a hydraulic cylinder is an indispensable part of a hydraulic control system as an actuating element. In some occasions, a piston rod of the hydraulic cylinder needs to be fixed for a long time, and in order to ensure the reliability of the working condition, the hydraulic cylinder needs to be automatically locked. At present, the following three locking means are commonly used, one is to lock the hydraulic cylinder by a hydraulic lock in a hydraulic system; the second is realized by arranging a bolt mechanism on a piston rod of the hydraulic cylinder; the third is to add a locking device to the cylinder piston. The three modes have commonality, namely, the self-locking can be carried out only at one position, and the self-locking requirements of two positions cannot be met. The hydraulic cylinder adopting the hydraulic lock for self locking is difficult to realize long-time locking of a piston rod of the hydraulic cylinder due to leakage of the hydraulic lock. For the locking mode of fixing the piston rod by using the bolt mechanism or the cushion block, the bolt or the cushion block is required to be manually moved, and the bolt mechanism is easy to generate a lateral force on the piston rod and the load shaft, and the lateral force not only can influence the service life of the piston rod or the load shaft, but also can possibly cause the bending of the piston rod or the load shaft, so that the oil leakage of the hydraulic cylinder can be generated, or the normal operation of the load can be influenced. The locking method of adding the locking device on the hydraulic cylinder piston has small locking load force, high-pressure oil is needed for unlocking, and long-time and high-precision locking cannot be met once oil leaks.
Disclosure of Invention
To solve the above technical problem, an object of the present invention is to provide a hydraulic cylinder having two locking positions.
The purpose of the utility model is realized like this: it includes the pneumatic cylinder, characterized by: it also comprises a self-locking device, the self-locking device comprises,
the nut type upper and lower positioning locks are screwed on the screw rod type self-locking shaft up and down, and the outer surfaces of each nut type upper and lower positioning lock are provided with a circle of concave grooves which are called clamping grooves;
the left and right wafer-type snap rings are respectively arranged on two sides of the shaft hole of the bottom plate and are symmetrical relative to the shaft hole, each snap ring is in a quadrilateral frame shape, one side facing the screw rod is in a concave semicircular shape, the rest three sides are in a doorframe shape, two side frame sides and one top frame side are arranged in the doorframe shape, an adjusting bolt is arranged on the top frame side, a tension spring hook is arranged on each side frame side, a tension spring is arranged on the two tension spring hooks on the same side of a pair of wafer-type snap rings, and the semicircular sides of the snap rings are defined to be matched with the clamping grooves (which can compensate the grooves of the positioning lock); a plunger oil cylinder is arranged in four side frames of each clamping ring, a plunger of each plunger oil cylinder faces outwards (in the direction opposite to the shaft) and is fixed on the bottom plate, an oil way of the plunger oil cylinder is arranged on the bottom plate, and an adjusting bolt is propped against the plunger;
the upper cover plate is provided with support legs, covers the bottom plate and is fixed by bolts;
the piston rod, the coupler and the screw rod type self-locking shaft of the hydraulic cylinder are sequentially connected from top to bottom, the upper end and the lower end of the connecting support are in a connecting flange shape, the hydraulic cylinder, the connecting support and an upper cover plate of the self-locking device are sequentially connected from top to bottom, and the piston rod, the coupler and the screw rod type self-locking shaft are arranged in the connecting support.
The locking method comprises the following steps: the self-locking position is determined according to the requirement, namely two adjusting bolts are screwed inwards (in the axial direction) to enable the left and right clamping rings to overcome the tension of the tension spring and move outwards and leave the clamping grooves of the positioning locks, the self-locking device is considered to be opened, and the positions of the two positioning locks are determined by rotating the two upper nut type positioning locks and the two lower nut type positioning locks. When the hydraulic cylinder normally operates, high-pressure oil enters the bottom of the plunger oil cylinder through an oil path of the plunger oil cylinder on the bottom plate to push the plunger to move outwards, the plunger pushes against the adjusting bolt and the snap ring to further move outwards to overcome the tension of the tension spring, the snap ring is separated from the snap groove, and a piston rod of the hydraulic cylinder drives the self-locking shaft and a load driven by the self-locking shaft to move together.
When the piston rod needs to be locked at the position of the lower positioning lock, the piston rod stops running, high-pressure oil at the bottom of the plunger oil cylinder is discharged, the plunger moves inwards (in the direction of the self-locking shaft), and due to the fact that external force is removed, the left clamping ring and the right clamping ring move towards the direction of the self-locking shaft under the action of the respective tension springs and enter the clamping grooves of the lower positioning lock, the positioning lock is hooped, the piston rod is positioned, and the piston rod is locked at the position of the lower positioning lock. In this case, the piston rod can be reliably self-locked in this position regardless of changes in the load or the state of the hydraulic system (e.g., no oil pressure due to system failure, etc.). Similarly, when the piston rod needs to be locked at the position of the upper positioning lock, the piston rod stops running, high-pressure oil at the bottom of the plunger oil cylinder is discharged, the plunger moves inwards, and due to the fact that external force is removed, the left clamping ring and the right clamping ring move towards the direction of the self-locking shaft under the action of the respective tension springs and enter the clamping grooves of the upper positioning lock, the positioning lock is hooped, the piston rod is positioned, and the piston rod is locked at the position of the upper positioning lock.
Compared with the prior art, the utility model has the positive effects that: the self-locking device can realize self-locking of an upper position and a lower position, and each self-locking position can realize adjustment; secondly, when the locking is carried out, the piston rod can be reliably self-locked at the position no matter how the load or the state of a hydraulic system changes; finally, as the self-locking means is that the circle of snap ring enters the circle of clamping groove to clamp the positioning lock, the clamping force generated by the spring is uniformly applied to the circumference of the clamping groove, the piston rod is prevented from bearing the lateral force, the piston rod is further protected, and the normal operation of the load shaft is ensured.
Drawings
The present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic view of the present invention, now in a state where the piston rod is locked in the position of the lower lock.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
Fig. 3 is a sectional view taken along line B-B of fig. 1.
Fig. 4 is an exploded view of the present self-locking device.
Detailed Description
The self-locking device comprises a hydraulic cylinder 100 and a self-locking device 300, wherein the self-locking device comprises a pair of nut type upper and lower positioning locks 303, an upper cover plate 302, a bottom plate 305 and a screw rod type self-locking shaft 301, shaft holes are formed in the centers of the upper cover plate and the bottom plate, the screw rod type self-locking shaft penetrates through the shaft holes of the upper cover plate and the bottom plate, the nut type upper and lower positioning locks are screwed on the screw rod type self-locking shaft up and down, and a circle of concave groove is formed in the outer surface of each nut type upper and lower positioning lock and is called a clamping;
the left and right wafer-type snap rings 306 are respectively arranged on two sides of the shaft hole of the bottom plate and are symmetrical relative to the shaft hole, each snap ring is in a four-sided frame shape, one side facing the screw rod is in a concave semicircular shape 309, the rest three sides are in a door frame shape, two side frame edges 310 and a top frame edge 313 are arranged in the door frame shape, an adjusting bolt 312 is arranged on the top frame edge, a tension spring hook 311 is arranged on each side frame edge, a tension spring 304 is arranged on the two tension spring hooks on the same side of a pair of wafer-type snap rings, and the semicircular edge of the snap ring is defined as being matched with a snap groove (which can compensate the groove of the positioning lock); a plunger oil cylinder 307 is arranged in the four side frames of each clamping ring, the plunger of each plunger oil cylinder faces outwards (in the direction opposite to the shaft) and is fixed on the bottom plate, an oil way 316 of the plunger oil cylinder is arranged on the bottom plate, and an adjusting bolt is propped against the plunger;
the upper cover plate is provided with skirt-type supporting legs 315, the upper cover plate covers the bottom plate, and bolt holes of the upper cover plate penetrate through the skirt and correspond to the bolt holes in the bottom plate and are fixed by bolts. 5 is a lock nut;
the piston rod 101, the coupler 4 and the screw rod type self-locking shaft of the hydraulic cylinder 100 are sequentially connected from top to bottom, the upper end and the lower end of the connecting support 200 are in a connecting flange shape 201, the hydraulic cylinder, the connecting support and an upper cover plate of the self-locking device are sequentially connected from top to bottom, and the piston rod, the coupler and the screw rod type self-locking shaft are arranged in the connecting support.
The locking method comprises the following steps: the self-locking position is determined according to the requirement, namely two adjusting bolts are screwed inwards (in the axial direction) to enable the left and right clamping rings to overcome the tension of the tension spring and move outwards and leave the clamping grooves of the positioning locks, the self-locking device is considered to be opened, and the positions of the two positioning locks are determined by rotating the two upper nut type positioning locks and the two lower nut type positioning locks. When the hydraulic cylinder normally operates, high-pressure oil enters the bottom of the plunger oil cylinder through an oil path of the plunger oil cylinder on the bottom plate to push the plunger to move outwards, the plunger pushes against the adjusting bolt and the snap ring to further move outwards to overcome the tension of the tension spring, the snap ring is separated from the snap groove, and a piston rod of the hydraulic cylinder drives the self-locking shaft and a load driven by the self-locking shaft to move together.
When the piston rod needs to be locked at the position of the lower positioning lock, the piston rod stops running, high-pressure oil at the bottom of the plunger oil cylinder is discharged, the plunger moves inwards (in the direction of the self-locking shaft), and due to the fact that external force is removed, the left clamping ring and the right clamping ring move towards the direction of the self-locking shaft under the action of the respective tension springs and enter the clamping grooves of the lower positioning lock, the positioning lock is hooped, the piston rod is positioned, and the piston rod is locked at the position of the lower positioning lock. In this case, the piston rod can be reliably self-locked in this position regardless of changes in the load or the state of the hydraulic system (e.g., no oil pressure due to system failure, etc.). Similarly, when the piston rod needs to be locked at the position of the upper positioning lock, the piston rod stops running, high-pressure oil at the bottom of the plunger oil cylinder is discharged, the plunger moves inwards, and due to the fact that external force is removed, the left clamping ring and the right clamping ring move towards the direction of the self-locking shaft under the action of the respective tension springs and enter the clamping grooves of the upper positioning lock, the positioning lock is hooped, the piston rod is positioned, and the piston rod is locked at the position of the upper positioning lock.
Claims (2)
1. A hydraulic cylinder having two locking positions, comprising a cylinder, characterized in that: it also comprises a self-locking device, the self-locking device comprises,
the nut type upper and lower positioning locks are screwed on the screw rod type self-locking shaft up and down, and the outer surfaces of each nut type upper and lower positioning lock are provided with a circle of concave grooves which are called clamping grooves;
the left and right wafer-type snap rings are respectively arranged on two sides of the shaft hole of the bottom plate and are symmetrical relative to the shaft hole, each snap ring is in a four-side frame shape, one side facing the screw rod is in a concave semicircular shape, the rest three sides are in a door frame shape, two side frame sides and one top frame side are arranged in the door frame shape, an adjusting bolt is arranged on the top frame side, a tension spring hook is arranged on each side frame side, a tension spring is arranged on the two tension spring hooks on the same side of a pair of wafer-type snap rings, and the semicircular sides of the snap rings are defined to be matched with the clamping grooves; a plunger oil cylinder is arranged in four side frames of each clamping ring, a plunger of each plunger oil cylinder faces outwards and is fixed on a bottom plate, an oil way of the plunger oil cylinder is arranged on the bottom plate, and an adjusting bolt is propped against the plunger;
the upper cover plate is provided with support legs, covers the bottom plate and is fixed by bolts;
the piston rod, the coupler and the screw rod type self-locking shaft of the hydraulic cylinder are sequentially connected from top to bottom, the upper end and the lower end of the connecting support are in a connecting flange shape, the hydraulic cylinder, the connecting support and an upper cover plate of the self-locking device are sequentially connected from top to bottom, and the piston rod, the coupler and the screw rod type self-locking shaft are arranged in the connecting support.
2. The hydraulic cylinder of claim 1 having two locking positions, wherein: the upper cover plate is provided with skirt-shaped supporting legs, the upper cover plate covers the bottom plate, and bolt holes of the upper cover plate penetrate through the skirt and correspond to the bolt holes in the bottom plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920672038.1U CN209838837U (en) | 2019-05-13 | 2019-05-13 | Hydraulic cylinder with two locking positions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920672038.1U CN209838837U (en) | 2019-05-13 | 2019-05-13 | Hydraulic cylinder with two locking positions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209838837U true CN209838837U (en) | 2019-12-24 |
Family
ID=68897023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920672038.1U Withdrawn - After Issue CN209838837U (en) | 2019-05-13 | 2019-05-13 | Hydraulic cylinder with two locking positions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209838837U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081043A (en) * | 2019-05-13 | 2019-08-02 | 沈阳东北电力调节技术有限公司 | There are two the hydraulic cylinders of latched position for tool |
-
2019
- 2019-05-13 CN CN201920672038.1U patent/CN209838837U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081043A (en) * | 2019-05-13 | 2019-08-02 | 沈阳东北电力调节技术有限公司 | There are two the hydraulic cylinders of latched position for tool |
| CN110081043B (en) * | 2019-05-13 | 2023-11-28 | 沈阳东北电力调节技术有限公司 | Hydraulic cylinder with two locking positions |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: SHENYANG NAISI CONTROL TECHNOLOGY CO.,LTD. Assignor: SHENYANG NORTHEAST ELECTRIC POWER CONTROL Co.,Ltd. Contract record no.: X2023210000146 Denomination of utility model: Hydraulic cylinder with two locking positions Granted publication date: 20191224 License type: Common License Record date: 20230927 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20191224 Effective date of abandoning: 20231128 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20191224 Effective date of abandoning: 20231128 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |