CN211202492U - Hydraulic cylinder structure with built-in steel ball self-locking mechanism at any position - Google Patents
Hydraulic cylinder structure with built-in steel ball self-locking mechanism at any position Download PDFInfo
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- CN211202492U CN211202492U CN201922432065.4U CN201922432065U CN211202492U CN 211202492 U CN211202492 U CN 211202492U CN 201922432065 U CN201922432065 U CN 201922432065U CN 211202492 U CN211202492 U CN 211202492U
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Abstract
The utility model relates to the field of hydraulic technology, especially, relate to built-in optional position steel ball self-locking mechanism pneumatic cylinder structure, the satisfying that current pneumatic cylinder can not be fine is at the long-time locking of optional position, and built-in optional position steel ball self-locking mechanism pneumatic cylinder structure, including cylinder cap, cylinder and piston rod, the one end that the piston rod is close to the cylinder cap has awl mesa and flange to cup joint piston and dog in proper order and use nut locking, the dog includes awl mesa and flange, the piston respectively with the great one end laminating of the awl mesa diameter on dog and the piston rod, be provided with shaped spring and a plurality of steel ball between piston and the awl mesa, sealing connection between cylinder and uide bushing and the piston realizes the locking of piston rod optional position in the cylinder through shaped spring and steel ball, has fine development prospect in the hydraulic technology field.
Description
Technical Field
The utility model relates to the field of hydraulic technology, especially, relate to built-in optional position steel ball self-locking mechanism pneumatic cylinder structure.
Background
The hydraulic cylinder is an actuating element in a hydraulic transmission system, is widely applied to the hydraulic system due to the advantages of simple structure, reliable work and the like, and is required to be stopped and locked at any position in a specific use occasion, and the piston rod stays at a certain fixed position for a long time.
The traditional method is to design a locking loop, generally a three-position four-way reversing valve, a one-way valve, a hydraulic control one-way valve, a two-way hydraulic lock and the like form a corresponding loop, so as to achieve the purpose of one-way or two-way locking; however, the hydraulic cylinder and the hydraulic valve are not always locked in a leakage manner, so that the piston rod cannot be guaranteed to stay at a certain fixed position for a long time, and the locking position can only be fixed at a certain point or a certain section of stroke, and the traditional hydraulic cylinder and hydraulic valve locking technology cannot meet the use requirements on occasions where the locking position requires any position.
The common locking modes of the existing hydraulic cylinder at any position comprise an outer plug bead, an outer pressing sleeve, a screw rod, a insection mesh, a disc spring locking sleeve and the like; the locking mode of the outer plug pin bead and the outer pressing sleeve is manual locking, so that the device is not suitable for modern operation; the locking mode of the screw rod and the insection mesh is automatic operation, but the additional system is complex and the mechanism is huge. Therefore, a new special structure of the locking hydraulic cylinder must be provided to realize the long-time arbitrary position locking.
SUMMERY OF THE UTILITY MODEL
To the above situation, for overcoming prior art's defect, the utility model provides a built-in optional position steel ball self-locking mechanism pneumatic cylinder structure solves the problem that current pneumatic cylinder can not be fine satisfies at the long-time locking in optional position.
The technical scheme is that the hydraulic cylinder structure with the built-in steel ball self-locking mechanism at any position comprises a cylinder cover, a cylinder barrel and a piston rod, wherein the piston rod is positioned in the cylinder barrel, one end of the piston rod, which is close to the cylinder cover, is provided with a cone table surface and a flange, a piston and a stop block are sequentially sleeved and locked by using a nut, the stop block comprises a cone table surface and a flange, the cone table surface and the flange on the piston rod and the cone table surface and the flange on the stop block form symmetry at two ends of the piston, the piston is respectively attached to the stop block and one end surface with larger diameter of the cone table surface on the piston rod, a special-shaped spring and a plurality of steel balls are arranged between the piston and the cone table surface, the special-shaped spring is an annular spring ring and a plurality of grooves which are uniformly distributed according to the circumference of the piston are formed between the piston and, the piston is enabled to have a proper clearance with the stop block and the end face of the large end of the frustum face on the piston rod, the piston can slide left and right to unlock the steel ball on the premise of compressing the special-shaped spring on one side, and the locking steel ball can be realized under the mutual compression state of the special-shaped springs on the two ends when the piston is static.
Furthermore, the special-shaped spring is a conical ring formed by a wavy metal material, the surface with the larger diameter of the special-shaped spring faces the piston, a groove for placing a steel ball is formed between the wavy arc of each sunken part of the wavy special-shaped spring and the piston, and the steel ball is arranged in each groove, so that the locking force is larger, and the locking state is more stable.
Still further, the profiled spring material is one of high carbon steel or alloy steel.
Furthermore, the two end faces of the piston are provided with bosses protruding outwards, the stop block and the side, with the larger diameter, of the conical table surface on the piston rod are in clearance fit with the inner hole of the bosses, the conical table surface is tightly clamped at the bosses at the two end parts of the piston, and when the piston rod is stopped at any position for a long time, a good locking purpose is achieved.
Furthermore, the surface of the piston is provided with a groove, a first sealing ring is arranged between the piston and the cylinder barrel, a second sealing ring is arranged between the piston and the piston rod, and each sealing ring is positioned in the groove to realize the sealing among the piston, the piston rod and the cylinder barrel.
Furthermore, a groove is formed in the guide sleeve, a third sealing ring is arranged between the guide sleeve and the cylinder barrel, a fourth sealing ring is arranged between the guide sleeve and the piston rod, and each sealing ring is located in the groove to realize sealing among the guide sleeve, the piston rod and the cylinder barrel.
Furthermore, the number of the grooves is multiple, and multiple sealing is adopted to avoid leakage of hydraulic oil.
The piston rod is arranged in the cylinder barrel, and the cylinder barrel is divided into a rodless cavity close to the cylinder cover and a rod cavity close to the guide sleeve; when the hydraulic cylinder is static, bosses on two sides of the piston are matched with the special-shaped spring, and the steel balls on two ends are tightly pressed against the inner wall of the cylinder barrel under the matching of the larger end surface of the frustum surface under the bidirectional jacking action, so that self-locking is formed; when the piston rod extends out, hydraulic oil is filled into the rodless cavity, the oil can push the piston to move towards the rod cavity, the piston leaves the steel ball at the rodless cavity end, and the steel ball at the rodless cavity end is unlocked and rolls forwards along the inner wall of the cylinder barrel; when the piston moves towards the rod cavity, the piston boss at the end of the rod cavity can support the steel ball to overcome the elasticity of the special-shaped spring so that the steel ball rolls downwards along the conical surface, the steel ball leaves the cylinder wall, the locking at the two ends is completely released, and the piston rod extends out; similarly, when the piston rod withdraws, hydraulic oil is filled into the rod cavity, the oil can push the piston to move towards the rodless cavity, the steel ball unlocking at the rod cavity end rolls along the inner wall of the cylinder barrel and moves forwards, the piston boss at the rodless cavity end can push the steel ball to leave the inner wall of the cylinder barrel, the two ends are locked and removed, the piston rod withdraws, and therefore, when the piston stops moving, the special-shaped springs at the two ends and the piston boss push the steel ball to compress tightly with the inner wall of the cylinder barrel, self-locking is completed, namely, the self-locking can be completed by the hydraulic cylinder at any.
The utility model has the technical effects that the special-shaped spring and the steel ball are arranged on the cone table top in the shape of a round table and are matched with each other, when the hydraulic cylinder is static, the steel balls at two ends are pressed against the inner wall of the cylinder barrel through the bidirectional jacking action of the special-shaped spring and the piston boss, and self-locking is formed; when hydraulic oil is filled into one end of the cylinder, the oil can push the piston to move towards the other side, and after the piston leaves, the steel ball which is flushed into the hydraulic oil is unlocked and rolls forwards along the inner wall of the cylinder barrel; meanwhile, the piston boss at the other end can support the steel ball to overcome the elastic force of the special-shaped spring to enable the steel ball to roll downwards along the conical surface, the steel ball leaves the inner wall of the cylinder barrel, the locking at the two ends is completely released, the piston rod moves, and when the piston rod stops at any position, the steel ball is tightly pressed with the cylinder barrel to realize the locking.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the piston rod structure of the present invention.
Fig. 3 is a schematic structural diagram of the present invention in a motion state of the piston.
Fig. 4 is a schematic structural diagram of the special-shaped spring of the present invention.
1. The novel cylinder comprises a cylinder cover, 2 parts of a nut, 3 parts of a stop block, 4 parts of a special-shaped spring, 5 parts of a steel ball, 6 parts of a first sealing ring, 7 parts of a second sealing ring, 8 parts of a piston, 9 parts of a cylinder barrel, 10 parts of a piston rod, 11 parts of a guide sleeve, 12 parts of a third sealing ring, 13 parts of a fourth sealing ring, 14 parts of a locking nut, 15 parts of an ear ring, 16 parts of a boss, 17 parts of a cone table surface and 18 parts of a flange.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely 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, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, 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; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows: the hydraulic cylinder structure with the built-in steel ball self-locking mechanism at any position is shown in the figures 1-3 and comprises a cylinder cover 1, a cylinder barrel 9 and a piston rod 10, wherein the piston rod 10 is positioned in the cylinder barrel 9, one end of the piston rod 10, which is close to the cylinder cover 1, is provided with a conical table surface 17 and a flange 18, a piston 8 and a stop block 3 are sequentially sleeved and locked by a nut 2, the stop block 3 comprises the conical table surface 17 and the flange 18, the conical table surface 17 and the flange 18 on the piston rod 10 and the conical table surface 17 and the flange 18 on the stop block 3 are symmetrical at two ends of the piston 8, the piston 8 is respectively attached to the stop block 3 and one end face with a larger diameter of the conical table surface 17 on the piston rod 10, a special-shaped spring 4 and a plurality of steel balls 5 are arranged between the piston 8 and the conical table surface, the special-shaped spring 4 is an annular spring ring and forms a plurality of special-shaped grooves uniformly distributed according to the, the reserved distance for installing the piston 8 on the piston rod is larger than the width of the piston, so that a proper gap is reserved between the piston 8 and the stop block 3 and the end face of the larger end of the conical table surface 17 on the piston rod 10, the piston 8 can slide left and right on the premise of compressing the special-shaped spring 4 on one side to unlock the steel ball, and the locking steel ball can be realized in a state that the special-shaped springs 4 at two ends are mutually compressed when the piston rod is static, one end, opposite to the piston 8, of the piston rod 10 is provided with a guide sleeve 11 to be matched with a cylinder barrel 9, the cylinder barrel 9 is connected with the guide sleeve 11 and the piston 8 in a sealing mode, oil in the hydraulic cylinder is prevented from leaking, one end, far away from the cylinder cover 1, of the piston rod 10 extends out.
Example two: on the basis of the first embodiment, the special-shaped spring 4 is a conical ring formed by a wavy metal material, the special-shaped spring 4 is made of one of high-carbon steel or alloy steel, the side with a larger diameter opening of the special-shaped spring 4 faces the piston 8, a groove for placing a steel ball is formed between a wavy arc at each concave part of the wavy special-shaped spring and the piston 8, the steel ball is arranged in each groove, so that the locking force is larger, the locking state is more stable, bosses 16 protruding outwards are arranged on two end faces of the piston 8, the stopper 3 and the side with a larger diameter of a conical table surface 17 on the piston rod 10 are in clearance fit with inner holes of the bosses 16, the conical table surfaces 17 are tightly clamped at the bosses at two end parts of the piston 8, when the piston rod is stopped at any position for a long time, a good locking purpose is realized, the groove is arranged on the surface of the piston 8, a first sealing ring 6 is arranged between the, the hydraulic cylinder is characterized in that a second sealing ring 7 is arranged between the piston 8 and the piston rod 10, each sealing ring is positioned in a groove to realize sealing between the piston and the piston rod and between the piston rod and the cylinder barrel, a groove is formed in the guide sleeve 11, a third sealing ring 12 is arranged between the guide sleeve 11 and the cylinder barrel, a fourth sealing ring 13 is arranged between the guide sleeve 11 and the piston rod 10, each sealing ring is positioned in a groove to realize sealing between the guide sleeve 11 and the piston rod and between the sealing rings and the cylinder barrel, the number of the grooves in the piston 8 and the guide sleeve 11 is multiple, and multiple sealing is adopted to avoid leakage of.
The working principle and the working process are as follows: the piston rod 10 is arranged in the cylinder barrel 9, and the cylinder barrel 9 is divided into a rodless cavity close to the cylinder cover 1 and a rod cavity close to the guide sleeve 11; when the hydraulic cylinder is static, bosses on two sides of the piston 8 are matched with the special-shaped spring 4, and the steel balls 5 on two ends are tightly pressed against the inner wall of the cylinder barrel 9 under the matching of the larger end surface of the frustum surface 17 under the bidirectional jacking action, so that self-locking is formed; when the piston rod extends out, hydraulic oil is filled into the rodless cavity, the oil can push the piston 8 to move towards the rod cavity, the piston 8 leaves the steel ball 5 at the rodless cavity end, and the steel ball 5 at the rodless cavity end is unlocked and rolls forwards along the inner wall of the cylinder barrel 9; when the piston moves towards the rod cavity, the boss of the piston 8 at the end of the rod cavity can support the steel ball 5 to overcome the elasticity of the special-shaped spring 4, so that the steel ball rolls downwards along the conical surface, the steel ball 5 leaves the cylinder wall, the locking at the two ends is completely released, and the piston rod 10 extends out; similarly, when the piston rod withdraws, hydraulic oil is filled into the rod cavity, the oil can push the piston 8 to move towards the rodless cavity, the steel ball 5 at the end of the rod cavity is unlocked to roll forwards along the inner wall of the cylinder barrel 9, the piston 8 boss at the end of the rodless cavity can push the steel ball 5 to leave the inner wall of the cylinder barrel 9, the locking at the two ends is released, the piston rod 10 withdraws, therefore, when the piston 8 stops moving, the special-shaped spring 4 at the two ends and the piston 8 boss push the steel ball 5 to compress tightly with the inner wall of the cylinder barrel 9, the self-locking is completed, namely, the self-locking can be completed by.
The utility model has the technical effects that the special-shaped spring and the steel ball are arranged on the cone table top in the shape of a round table and are matched with each other, when the hydraulic cylinder is static, the steel balls at two ends are pressed against the inner wall of the cylinder barrel through the bidirectional jacking action of the special-shaped spring and the piston boss, and self-locking is formed; when hydraulic oil is filled into one end of the cylinder, the oil can push the piston to move towards the other side, and after the piston leaves, the steel ball which is flushed into the hydraulic oil is unlocked and rolls forwards along the inner wall of the cylinder barrel; meanwhile, the piston boss at the other end can support the steel ball to overcome the elastic force of the special-shaped spring to enable the steel ball to roll downwards along the conical surface, the steel ball leaves the inner wall of the cylinder barrel, the locking at the two ends is completely released, the piston rod moves, and when the piston rod stops at any position, the steel ball is tightly pressed with the cylinder barrel to realize the locking.
The present invention has been described in detail with reference to the specific embodiments and examples, but these should not be construed as limitations of the present invention. Numerous variations and modifications can be made by those skilled in the art without departing from the principles of the invention, which should also be considered as within the scope of the invention.
Claims (6)
1. A hydraulic cylinder structure with a built-in steel ball self-locking mechanism at any position comprises a cylinder cover (1), a cylinder barrel (9) and a piston rod (10), and is characterized in that the piston rod (10) is positioned in the cylinder barrel (9), one end of the piston rod (10) close to the cylinder cover (1) is provided with a cone table surface (17) and a flange (18), a piston (8) and a check block (3) are sequentially sleeved and locked by using a nut (2), the distance of a piston mounting section on the piston rod is greater than the width of the piston, the check block (3) comprises the cone table surface (17) and the flange (18), the piston (8) is respectively attached to the check block (3) and one end of the piston rod (10) with larger diameter of the cone table surface, a special-shaped spring (4) and a plurality of steel balls (5) are arranged between the piston (8) and the cone table surface, the special-shaped spring (4) is an annular spring ring and forms a plurality of, each steel ball (5) is positioned in each groove between the special-shaped spring (4) and the piston (8), one end, opposite to the piston, of the piston rod (10) is provided with a guide sleeve (11) matched with the cylinder barrel (9), the cylinder barrel (9) is connected with the guide sleeve (11) and the piston (8) in a sealing mode, and one end, far away from the cylinder cover (1), of the piston rod (10) extends out of the cylinder barrel (9) and is connected with an ear ring (15) through a locking nut (14).
2. The self-locking mechanism hydraulic cylinder structure with the built-in optional position steel ball as claimed in claim 1, wherein the shaped spring (4) is a conical ring made of wavy metal material, and the surface of the shaped spring (4) with the larger diameter opening faces the piston (8) and forms a groove with the piston (8) for placing the steel ball.
3. The self-locking mechanism hydraulic cylinder structure with the built-in optional position steel ball as claimed in claim 1, wherein two end faces of the piston (8) are provided with outward protruding bosses (16), and the stopper (3) and one face with larger diameter of the conical table face (17) on the piston rod (10) are in clearance fit with inner holes of the bosses (16).
4. The built-in arbitrary position steel ball self-locking mechanism hydraulic cylinder structure according to claim 1, characterized in that the surface of the piston (8) is provided with a groove, a first sealing ring (6) is arranged between the piston (8) and the cylinder barrel, a second sealing ring (7) is arranged between the piston (8) and the piston rod (10), and each sealing ring is positioned in the groove.
5. The built-in arbitrary position steel ball self-locking mechanism hydraulic cylinder structure according to claim 1, characterized in that a groove is arranged on the guide sleeve (11), a third seal ring (12) is arranged between the guide sleeve (11) and the cylinder barrel, a fourth seal ring (13) is arranged between the guide sleeve (11) and the piston rod (10), and each seal ring is positioned in the groove.
6. The self-locking mechanism hydraulic cylinder structure with the built-in optional position steel ball as claimed in claim 4 or 5, wherein the number of the grooves is multiple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922432065.4U CN211202492U (en) | 2019-12-30 | 2019-12-30 | Hydraulic cylinder structure with built-in steel ball self-locking mechanism at any position |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922432065.4U CN211202492U (en) | 2019-12-30 | 2019-12-30 | Hydraulic cylinder structure with built-in steel ball self-locking mechanism at any position |
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| Publication Number | Publication Date |
|---|---|
| CN211202492U true CN211202492U (en) | 2020-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922432065.4U Active CN211202492U (en) | 2019-12-30 | 2019-12-30 | Hydraulic cylinder structure with built-in steel ball self-locking mechanism at any position |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113357221A (en) * | 2021-06-29 | 2021-09-07 | 中船重工中南装备有限责任公司 | Steel ball type hydraulic cylinder with bidirectional mechanical locking |
| CN114607673A (en) * | 2022-03-24 | 2022-06-10 | 华南理工大学 | Novel linear cylinder and impact parameter calculation method thereof |
| CN115289096A (en) * | 2022-09-29 | 2022-11-04 | 常州市振跃液压机械有限公司 | Take auto-lock protection device's explosion-proof hydraulic cylinder |
-
2019
- 2019-12-30 CN CN201922432065.4U patent/CN211202492U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113357221A (en) * | 2021-06-29 | 2021-09-07 | 中船重工中南装备有限责任公司 | Steel ball type hydraulic cylinder with bidirectional mechanical locking |
| CN114607673A (en) * | 2022-03-24 | 2022-06-10 | 华南理工大学 | Novel linear cylinder and impact parameter calculation method thereof |
| CN115289096A (en) * | 2022-09-29 | 2022-11-04 | 常州市振跃液压机械有限公司 | Take auto-lock protection device's explosion-proof hydraulic cylinder |
| CN115289096B (en) * | 2022-09-29 | 2023-02-03 | 常州市振跃液压机械有限公司 | Take auto-lock protection device's explosion-proof hydraulic cylinder |
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