CN219197785U - Mechanical self-locking oil cylinder structure - Google Patents
Mechanical self-locking oil cylinder structure Download PDFInfo
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- CN219197785U CN219197785U CN202320116017.8U CN202320116017U CN219197785U CN 219197785 U CN219197785 U CN 219197785U CN 202320116017 U CN202320116017 U CN 202320116017U CN 219197785 U CN219197785 U CN 219197785U
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Abstract
The mechanical self-locking oil cylinder structure comprises a cylinder cover, a piston rod, a cylinder barrel, a piston and a cylinder bottom which are matched with each other; the outer circle of the cylinder barrel is respectively provided with a rodless cavity oil port and a rod cavity oil port, the right side of the cylinder barrel is fixedly connected with the cylinder cover, the left side of the cylinder barrel is fixedly connected with the cylinder bottom, the piston rod is arranged in the cylinder barrel, and the piston is sleeved on the piston rod; the self-locking structure is characterized in that the self-locking structure is formed by a limiting nut, a locking sleeve, a steel ball and the like, the steel ball falls into a trapezoidal groove of the limiting nut during locking, and the steel ball is separated from the trapezoidal groove during unlocking, so that the self-locking structure is simple in structure, convenient to install and good in locking effect.
Description
Technical field:
the utility model belongs to the technical field of hydraulic cylinders, and relates to a cylinder with a mechanical self-locking structure.
The background technology is as follows:
the hydraulic cylinder has the characteristics of simple structure, large output force, stable and reliable performance, convenient use and maintenance, wide application range and the like, and is started to be applied in more and more fields. However, in some special cases, the cylinder is required to perform a locking action after the piston rod is contracted, and the locking is firm, so that the piston rod does not move.
The existing oil cylinder self-locking structure has various types, but has certain defects to different degrees in the longitudinal view of the existing structure, for example, the structure of CN112065817A is relatively complex, and can realize self-locking at any position, but is not applicable under the condition that the self-locking is only needed when a piston rod is in a retracted state in the place.
In addition, in CN208518997U patent, an external friction mechanical self-locking hydraulic cylinder based on ball screw has the following drawbacks: the locking is realized through the threaded structure of the piston rod or the arrangement of the ball screw, the appearance size is large, the structure is complex, the appearance of the piston rod is different from that of a conventional oil cylinder, and the piston rod is inconvenient to install in a special space.
The utility model comprises the following steps:
aiming at the problems in the prior art, the utility model aims to provide the mechanical self-locking oil cylinder structure which has a simple structure, can realize the locking function when the piston rod is retracted through parts and structures such as the steel ball, the locking sleeve, the trapezoid groove and the like, and is firmly locked.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the mechanical self-locking oil cylinder structure comprises a cylinder cover, a piston rod, a cylinder barrel, a piston and a cylinder bottom which are matched with each other; the outer circle of the cylinder barrel is respectively provided with a rodless cavity oil port and a rod cavity oil port, the right side of the cylinder barrel is fixedly connected with the cylinder cover, the left side of the cylinder barrel is fixedly connected with the cylinder bottom, the piston rod is arranged in the cylinder barrel, and the piston is sleeved on the piston rod; wherein:
the left end of the piston rod is fixedly connected with a limit nut, the left side of the excircle of the limit nut is a conical surface, and a trapezoid groove is formed inwards on the conical surface;
the piston is sleeved on the piston rod and positioned on the right side of the limit nut, a stop is arranged on the piston rod, the piston can slide between the right side of the limit nut and the stop of the piston rod on the piston rod, a sealing supporting structure is respectively arranged at the matched part of the piston, the cylinder barrel and the piston rod, a first spring is arranged between the right end surface of the piston and the stop of the piston rod, and a limit check ring is arranged on the inner ring of the piston close to the bottom end of the cylinder;
the locking sleeve is sleeved on the outer edge of the left side of the piston inner ring, one end of the locking sleeve is axially limited by the limiting retainer ring, the other end of the locking sleeve is limited by the left end face of the piston outer ring, the locking sleeve can move along the outer edge face of the piston inner ring between the limiting retainer ring and the left end face of the piston outer ring, a chamfer angle is arranged on the left side of an inner hole of the locking sleeve for the steel ball to separate from the locking sleeve, and a second spring is arranged between the locking sleeve and the left end face of the piston outer ring;
the right side of the cylinder bottom is provided with a ring bench section, a group of radial holes are uniformly distributed on the outer bench on the rightmost side of the ring bench section, a group of steel balls are respectively arranged in the radial holes and limited by a steel ball limiting structure, the steel balls fall into a limiting nut trapezoid groove during locking, the steel balls are separated from the trapezoid groove during unlocking, and oil holes are uniformly distributed on the left side of the radial holes so as to facilitate oil to enter the inner side of the cylinder bottom.
Further, the steel ball limiting structure is as follows: the lower end of the radial hole is provided with a boss structure for preventing the steel ball from falling inwards, and the outer end face of the radial hole is subjected to proofing and punching after the steel ball is filled in the radial hole so that the opening part becomes smaller and the steel ball is prevented from deviating from the cylinder bottom.
Further, the sealing support structure comprises a sealing ring between the piston and the piston rod, a sealing ring between the piston and the cylinder barrel and a supporting ring.
Further, the left end of the piston rod is connected with a limit nut through threads.
Further, a supporting ring is arranged between the outer circle of the locking sleeve and the inner wall of the cylinder barrel.
Further, the left side of the cylinder barrel is connected with a cylinder bottom through threads, and O-shaped rings are distributed at two ends of external threads of the cylinder bottom for sealing.
Further, the cylinder cover is provided with a sealing groove, a sealing piece and a supporting element are arranged on the cylinder cover, and the cylinder cover is connected with the cylinder barrel through threads.
By adopting the technical scheme, the locking function is realized when the piston rod is retracted through the parts and structures such as the steel ball, the locking sleeve, the trapezoid groove and the like, and the locking is firm, the structure is simple, and the installation is convenient.
Description of the drawings:
the utility model is described in detail below with reference to the attached drawings:
FIG. 1 is a schematic diagram of an oil cylinder operation structure according to the present utility model;
FIG. 2 is a schematic diagram of a second oil cylinder structure according to the present utility model;
FIG. 3 is a schematic diagram of a third oil cylinder structure according to the present utility model;
FIG. 4 is a schematic diagram of a cylinder structure according to the present utility model;
FIG. 5 is a schematic diagram of a cylinder structure according to the present utility model;
FIG. 6 is a schematic diagram of a cylinder structure of the present utility model;
fig. 7 is an enlarged view of a portion of fig. 2 in accordance with the present utility model.
The specific embodiment is as follows:
the utility model is described in detail below with reference to the attached drawings and examples:
fig. 1-7 show an embodiment of the utility model, a mechanical self-locking cylinder structure, comprising a cylinder cover 1, a piston rod 2, a cylinder barrel 3, a piston 4 and a cylinder bottom 5 which are matched with each other; the outer circle of the cylinder barrel 3 is respectively provided with a rodless cavity oil port 31 and a rod cavity oil port 32, the right side is fixedly connected with the cylinder cover 1, the left side is fixedly connected with the cylinder bottom 5, the piston rod 2 is arranged in the cylinder barrel 3, and the piston 4 is sleeved on the piston rod 2;
the cylinder head 1 is provided with a sealing groove 11, is provided with a sealing element and a supporting element, and the cylinder head 1 is connected with the cylinder 5 through threads.
The left end of the piston rod 2 is fixedly connected with a limit nut 6 through threads, the left side of the excircle of the limit nut is a conical surface 61, and a trapezoidal groove 62 is formed inwards on the conical surface;
the piston 4 is sleeved on the piston rod 1 and positioned on the right side of the limit nut 6, a stop 21 is arranged on the piston rod 2, the piston 4 can slide between the right side of the limit nut 6 and the piston rod stop 21 on the piston rod, sealing supporting structures (comprising a sealing ring 41 between the piston and the piston rod, a sealing ring 41 between the piston and the cylinder and a supporting ring 43) are respectively arranged at the matched parts of the piston, the cylinder and the piston rod, a first spring 71 is arranged between the piston outer ring 44 and the piston rod stop 21, and a limiting retainer ring 8 is arranged on the piston inner ring 45 close to the bottom end of the cylinder;
the locking sleeve 9 is sleeved on the outer edge of the left side of the piston inner ring 45, one end of the locking sleeve 9 is axially limited by the limiting retainer ring 8, the other end of the locking sleeve 9 is limited by the left end face of the piston outer ring 44, the locking sleeve 9 can move along the outer edge face of the piston inner ring 45 between the limiting retainer ring 8 and the left end face of the piston outer ring 44, a chamfer 91 is arranged on the left side of an inner hole of the locking sleeve 9 and used for the steel ball 10 to separate from the locking sleeve 9, and a second spring 72 is arranged between the locking sleeve 9 and the left end face of the piston outer ring 44; a supporting ring 92 is arranged between the outer circle of the locking sleeve 9 and the inner wall of the cylinder barrel 3.
The left side of the cylinder barrel 3 is connected with a cylinder bottom 5 through threads, O-shaped rings 53 are distributed at two ends of external threads of the cylinder bottom 5 for sealing, a ring table section 51 is arranged on the right side of the cylinder bottom 5, a group of radial holes 52 are uniformly distributed on the outer table on the rightmost side of the ring table section, a group of steel balls 10 are respectively arranged in the radial holes 52 and limited by a steel ball limiting structure (as shown in figure 7, the steel ball limiting structure is that the lower end of the radial holes 52 is provided with a boss structure 521 for preventing the steel balls from falling inwards, the opening of the radial holes 52 is reduced by a sample stamping 522 on the outer end face of the steel balls after the steel balls are filled in), the steel balls 10 fall into a limit nut trapezoid groove 62 during locking, the steel balls 10 are separated from the trapezoid groove 62 during unlocking, and oil passing holes 54 are uniformly distributed on the left side of the radial holes 52 so that oil can enter the inner side of the cylinder bottom.
The action is as follows:
when the oil port of the rod cavity is filled with oil, the piston drives the piston rod to shrink inwards, when the limit nut enters the inner platform of the cylinder bottom, the inclined surface of the limit nut jacks up the steel ball, part of the steel ball protrudes out of the outer platform, and a sample punch is punched outside the radial hole to prevent the steel ball from falling out; when the locking sleeve moves until the locking sleeve contacts the steel ball, the locking sleeve starts to clamp, the piston and the piston rod continue to move towards the rodless cavity under the action of hydraulic oil, the spring II starts to compress, and the piston rod continues to drive the limit nut to move towards the bottom end of the cylinder, as shown in fig. 2; when the steel ball starts to fall into the trapezoid groove of the limit nut, the steel ball starts to fall into the trapezoid groove under the auxiliary effect of the inner chamfer of the locking sleeve, and the locking sleeve continues to move towards the cylinder bottom under the effect of the second spring, as shown in fig. 3; when the steel ball falls into the trapezoid groove completely, the spherical surface is lower than the inner side surface of the locking sleeve, the locking sleeve is not blocked by the steel ball any more, the second spring pushes the locking sleeve to move towards the bottom end of the cylinder until being blocked by the steel wire check ring, at the moment, the locking sleeve completely seals the outer side of the steel ball, the steel ball realizes mechanical locking under the combined action of the trapezoid groove and the locking sleeve, and the nut and the piston rod cannot move completely, as shown in figure 1.
When the oil port of the rodless cavity is filled with oil, hydraulic oil resists the action of the first spring to start pushing the piston to move towards the rod cavity, and the piston drives the locking sleeve to move towards the rod cavity together according to the limiting action of the steel wire check ring; when the steel ball starts to enter the inner chamfer of the locking sleeve, hydraulic oil enters the bottom of the steel ball through the oil passing hole at the left side of the steel ball, the steel ball starts to float upwards, is extruded into the bevel angle and acts on the bevel of the locking sleeve to push the locking sleeve to move towards the rod cavity, as shown in fig. 4; when the steel ball is out of the limit of the locking sleeve, the steel ball can completely float upwards and is separated from the trapezoid groove, at the moment, the piston rod starts to extend outwards under the action of hydraulic oil, and the extending movement of the piston rod is not limited any more, as shown in fig. 5.
The locking function is realized by the parts and structures such as the steel ball, the locking sleeve, the trapezoid groove and the like when the piston rod is retracted, the steel ball moves in a radial hole of the cylinder bottom, a boss is arranged below the radial hole, and a proofing punch is arranged above the radial hole, so that the steel ball is prevented from falling off. When in locking, the lower end of the steel ball falls into the trapezoid groove of the limit nut, the upper end of the steel ball is completely blocked by the locking sleeve, the steel ball cannot be sprung, and the corresponding limit nut and a piston rod in threaded connection with the limit nut cannot move, so that the hydraulic cylinder realizes mechanical self-locking. The locking and unlocking processes also depend on the functions of the two springs, and the locking and unlocking device is simple in structure and convenient to install.
While the foregoing description illustrates and describes the preferred embodiments of the present utility model, as noted above, it is to be understood that the utility model is not limited to the forms disclosed herein but is not to be construed as excluding other embodiments, and that various other combinations, modifications and environments are possible and may be made within the scope of the inventive concepts described herein, either by way of the foregoing teachings or by those of skill or knowledge of the relevant art. And that modifications and variations which do not depart from the spirit and scope of the utility model are intended to be within the scope of the appended claims.
Claims (7)
1. A mechanical self-locking oil cylinder structure is characterized in that: the device comprises a cylinder cover, a piston rod, a cylinder barrel, a piston and a cylinder bottom which are matched with each other; the outer circle of the cylinder barrel is respectively provided with a rodless cavity oil port and a rod cavity oil port, the right side of the cylinder barrel is fixedly connected with the cylinder cover, the left side of the cylinder barrel is fixedly connected with the cylinder bottom, the piston rod is arranged in the cylinder barrel, and the piston is sleeved on the piston rod; wherein:
the left end of the piston rod is fixedly connected with a limit nut, the left side of the excircle of the limit nut is a conical surface, and a trapezoid groove is formed inwards on the conical surface;
the piston is sleeved on the piston rod and positioned on the right side of the limit nut, a stop is arranged on the piston rod, the piston can slide between the right side of the limit nut and the stop of the piston rod on the piston rod, a sealing supporting structure is respectively arranged at the matched part of the piston, the cylinder barrel and the piston rod, a first spring is arranged between the right end surface of the piston and the stop of the piston rod, and a limit check ring is arranged on the inner ring of the piston close to the bottom end of the cylinder;
the locking sleeve is sleeved on the outer edge of the left side of the piston inner ring, one end of the locking sleeve is axially limited by the limiting retainer ring, the other end of the locking sleeve is limited by the left end face of the piston outer ring, the locking sleeve can move along the outer edge face of the piston inner ring between the limiting retainer ring and the left end face of the piston outer ring, a chamfer angle is arranged on the left side of an inner hole of the locking sleeve for the steel ball to separate from the locking sleeve, and a second spring is arranged between the locking sleeve and the left end face of the piston outer ring;
the right side of the cylinder bottom is provided with a ring bench section, a group of radial holes are uniformly distributed on the outer bench on the rightmost side of the ring bench section, a group of steel balls are respectively arranged in the radial holes and limited by a steel ball limiting structure, the steel balls fall into a limiting nut trapezoid groove during locking, the steel balls are separated from the trapezoid groove during unlocking, and oil holes are uniformly distributed on the left side of the radial holes so as to facilitate oil to enter the inner side of the cylinder bottom.
2. The mechanically self-locking cylinder structure of claim 1, wherein: the steel ball limiting structure is as follows: the lower end of the radial hole is provided with a boss structure for preventing the steel ball from falling inwards, and the outer end face of the radial hole is subjected to proofing and punching after the steel ball is filled in the radial hole so that the opening part becomes smaller and the steel ball is prevented from deviating from the cylinder bottom.
3. A mechanically self-locking cylinder structure according to claim 1 or 2, characterized in that: the sealing support structure comprises a sealing ring between the piston and the piston rod, and a sealing ring and a supporting ring between the piston and the cylinder barrel.
4. A mechanically self-locking cylinder structure as claimed in claim 3, wherein: the left end of the piston rod is connected with a limit nut through threads.
5. A mechanically self-locking cylinder structure as claimed in claim 3, wherein: a supporting ring is arranged between the outer circle of the locking sleeve and the inner wall of the cylinder barrel.
6. A mechanically self-locking cylinder structure as claimed in claim 3, wherein: the left side of the cylinder barrel is connected with a cylinder bottom through threads, and O-shaped rings are distributed at two ends of external threads of the cylinder bottom for sealing.
7. A mechanically self-locking cylinder structure as claimed in claim 3, wherein: the cylinder cover is provided with a sealing groove, a sealing piece and a supporting element, and the cylinder cover is connected with the cylinder barrel through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320116017.8U CN219197785U (en) | 2023-01-13 | 2023-01-13 | Mechanical self-locking oil cylinder structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320116017.8U CN219197785U (en) | 2023-01-13 | 2023-01-13 | Mechanical self-locking oil cylinder structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219197785U true CN219197785U (en) | 2023-06-16 |
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ID=86704720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320116017.8U Active CN219197785U (en) | 2023-01-13 | 2023-01-13 | Mechanical self-locking oil cylinder structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219197785U (en) |
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2023
- 2023-01-13 CN CN202320116017.8U patent/CN219197785U/en active Active
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