CN218509843U - Double-spline mechanical locking structure of swing oil cylinder - Google Patents
Double-spline mechanical locking structure of swing oil cylinder Download PDFInfo
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- CN218509843U CN218509843U CN202223090768.1U CN202223090768U CN218509843U CN 218509843 U CN218509843 U CN 218509843U CN 202223090768 U CN202223090768 U CN 202223090768U CN 218509843 U CN218509843 U CN 218509843U
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Abstract
The utility model relates to a hydro-cylinder locking technical field especially relates to a double spline mechanical locking structure of swing hydro-cylinder, include: the self-locking hydraulic cylinder comprises an oil cylinder barrel, a self-locking piston and an elastic piece, wherein the oil cylinder barrel is provided with an oil cylinder end cover; the self-locking cylinder barrel is fixedly connected with the oil cylinder barrel, a self-locking oil cavity is formed between the self-locking cylinder barrel and the oil cylinder end cover, an oil port communicated with the self-locking oil cavity is formed in the oil cylinder barrel, and a tail cover is fixedly connected to one end of the self-locking cylinder barrel; one end of the self-locking piston is matched with the oil cylinder piston rod through a first spline, and the other end of the self-locking piston is matched with the tail cover through a second spline; one end of the elastic piece is propped against or connected with the self-locking piston, and the other end of the elastic piece is propped against or connected with the tail cover. The utility model discloses a double spline mechanical locking structure of swing hydro-cylinder can realize the locking of swing hydro-cylinder under two extreme angle positions, processing convenient assembling, and the locking reliability is higher, does not receive hydraulic component or the influence of internal seal spare.
Description
Technical Field
The utility model relates to a hydro-cylinder locking technical field especially relates to a double spline mechanical locking structure of swing hydro-cylinder.
Background
The swing oil cylinder is used as an output torque executing element and mainly converts mechanical energy generated by oil pressure into rotary motion. According to the requirements of some working conditions, sometimes the equipment needs to be rotated to a certain angle and then the position is kept unchanged for a long time, and at the moment, the spiral swinging cylinder needs to be locked. At present, the oscillating cylinder is not changed at any angle or is self-locked by a hydraulic oil circuit, and the self-locking of the oil circuit usually maintains the pressure of hydraulic oil in the oscillating cylinder through elements such as a one-way valve, a balance valve and the like, so that the hydraulic oil cannot return to an oil tank, and the self-locking of any angle is realized. However, considering that a certain leakage amount exists in the hydraulic valve element, the long-time pressure maintaining can also cause the swinging cylinder to be incapable of locking, so that the connected equipment generates rotary deviation; the installation mode of the swing oil cylinder is diversified, and the swing oil cylinder can also cause a certain rotation of an angle under the action of the gravity of the equipment or other external forces; therefore, self-locking of the oil way is realized through the hydraulic valve, and the precision and the reliability of the hydraulic valve cannot be guaranteed under long-time special working conditions.
At present, the swing oil cylinder stops at any angle in a spiral range only through a hydraulic valve element to perform pressure maintaining on hydraulic oil in the oil cylinder, and the design mainly has the following defects:
1. the self-locking of the oil circuit is realized by means of elements such as the one-way valve, the balance valve and the like, the cost is increased, meanwhile, the oil circuit is increased, once the leakage of the hydraulic element or the leakage failure of the oil circuit occurs, the swing cylinder rotates, and the self-locking precision and the safety reliability are poor.
2. In some severe special conditions, such as tunnel drilling equipment, the swing cylinder is required to be kept in a fixed position for a long time, and is accompanied by severe vibration impact. Under the environment, the self-locking of the hydraulic circuit is impacted by external force for a long time and under the action of gravity of equipment, valve leakage is inevitable, and pressure cannot be kept, so that the swing cylinder is subjected to rotary deviation.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the existing swing oil cylinder realizes oil cylinder self-locking by maintaining pressure of hydraulic oil in the oil cylinder through a hydraulic valve element, and under some severe special working conditions, the self-locking of a hydraulic loop is impacted by external force and under the action of equipment gravity for a long time, so that valve leakage can occur, the pressure cannot be maintained, and the swing cylinder is caused to rotate and deviate.
The utility model provides a not enough to above-mentioned prior art, the utility model provides a swing hydro-cylinder's double spline mechanical locking structure can realize the locking of swing hydro-cylinder under two extreme angle positions, and processing convenient assembling, locking reliability is higher, does not receive the influence of hydraulic component or inside seal spare.
In order to achieve the above object, the utility model provides a double spline mechanical locking structure of swing hydro-cylinder, include:
the oil cylinder barrel is provided with an oil cylinder end cover, and an oil cylinder piston rod penetrates through the oil cylinder end cover;
the self-locking cylinder barrel is fixedly connected with the oil cylinder barrel, a self-locking oil cavity is formed between the self-locking cylinder barrel and the oil cylinder end cover, an oil port communicated with the self-locking oil cavity is formed in the oil cylinder barrel, and a tail cover is fixedly connected to one end of the self-locking cylinder barrel;
the self-locking piston is movably arranged in the self-locking cylinder barrel along the axial direction, one end of the self-locking piston is matched with the piston rod of the oil cylinder through a first spline, and the other end of the self-locking piston is matched with the tail cover through a second spline;
the elastic piece is arranged between the tail cover and the self-locking piston, one end of the elastic piece is abutted against or connected with the self-locking piston, and the other end of the elastic piece is abutted against or connected with the tail cover.
The utility model discloses a double spline mechanical locking structure of swing hydro-cylinder, self-locking piston locks piston rod through first spline fit with piston rod, through self-locking piston, and piston rod is difficult for taking place to rotate under the exogenic action, and the locking reliability is high, and does not receive the influence of hydraulic component or inside seal spare.
Furthermore, one end of the self-locking piston is provided with a first guide hole matched with the oil cylinder piston rod, the oil cylinder piston rod is inserted into the first guide hole, the oil cylinder piston rod is provided with a first external spline, and the first guide hole is internally provided with a first internal spline matched with the first external spline.
Furthermore, the tail cover is provided with a second guide hole, the self-locking piston is inserted into the second guide hole, a second external spline is arranged on the self-locking piston, and a second internal spline matched with the second external spline is arranged in the second guide hole.
Further, a mounting hole is formed in the self-locking piston, and one end of the elastic piece is assembled into the mounting hole.
Furthermore, a plurality of elastic pieces are arranged between the tail cover and the self-locking piston, and the elastic pieces are uniformly arranged at intervals.
Furthermore, a first boss which abuts against the rear end face of the oil cylinder barrel is arranged at the rear end of the self-locking cylinder barrel, and a second boss which abuts against the rear end face of the self-locking cylinder barrel is arranged at the rear end of the tail cover.
Furthermore, a first sealing ring is arranged between the self-locking cylinder barrel and the self-locking piston, and a second sealing ring is arranged between the self-locking cylinder barrel and the oil cylinder barrel.
Furthermore, a guide ring is arranged between the self-locking piston and the self-locking cylinder barrel, and an annular groove for installing the guide ring is arranged on the self-locking piston.
The utility model discloses a double spline mechanical locking structure of swing hydro-cylinder's beneficial effect has:
1. under the elastic action of the elastic piece, the self-locking piston is matched with the oil cylinder piston rod through the first spline, and the self-locking piston is matched with the tail cover through the second spline, so that the self-locking piston and the oil cylinder piston rod cannot rotate, the oil cylinder piston rod is locked, the locking reliability is high, and the self-locking device is more reliably installed and cannot be influenced by a hydraulic element or an internal sealing piece when being used for realizing self-locking through hydraulic oil path pressure maintaining.
2. The self-locking piston is provided with a first guide hole, the tail cover is provided with a second guide hole, and in the process that the self-locking piston moves along the axial direction, the first guide hole and the second guide hole simultaneously guide the movement of the self-locking piston, so that the self-locking piston is convenient to be matched with the piston rod of the oil cylinder and the tail cover.
3. Through the arrangement of the first spline and the second spline, the locking and contact locking modes of the piston rod of the oil cylinder are simple and reliable, the locking structure is simple, and the processing and the assembly are convenient.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram of a double-spline mechanical locking structure of the swing cylinder of the present invention.
In the figure: 1. an oil cylinder barrel; 2. an oil cylinder end cover; 3. a cylinder piston rod; 4. a cylinder barrel is self-locked; 5. a self-locking oil cavity; 6. an oil port; 7. a tail cap; 8. a self-locking piston; 9. an elastic member; 10. a first guide hole; 11. a second guide hole; 12. mounting holes; 13. a first boss; 14. a second boss; 15. a first seal ring; 16. a second seal ring; 17. a third seal ring; 18. a guide ring.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified. In the description of the present invention, it should be noted that, 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 in specific cases to those skilled in the art.
As shown in figure 1, the double spline mechanical locking structure of the swing oil cylinder of the utility model comprises an oil cylinder barrel, a piston rod is arranged in the oil cylinder barrel 1, the oil cylinder is a spiral swing oil cylinder, an oil cylinder piston rod 3 rotates in the oil cylinder barrel 1, an oil cylinder end cover 2 is arranged in the oil cylinder barrel 1, the oil cylinder piston rod 3 is fixedly connected with the oil cylinder end cover 2, the rear end of the oil cylinder barrel 1 is fixedly connected with a self-locking cylinder barrel 4, the rear end of the self-locking cylinder barrel 4 is fixedly connected with a tail cover 7, the oil cylinder barrel 1, the self-locking cylinder barrel 4 and the tail cover 7 are fixed by screws, spacing space has between the preceding terminal surface of auto-lock cylinder 4 and hydro-cylinder end cover 2, form auto-lock oil pocket 5, be equipped with the auto-lock hydraulic fluid port 6 that is linked together with the auto-lock oil tank on the hydro-cylinder 1, be provided with auto-lock piston 8 in the auto-lock cylinder 4, auto-lock piston 8 sets up along 4 axial activities of auto-lock cylinder, the front end of auto-lock piston 8 and hydro-cylinder piston rod 3 are through first spline fit, the rear end of auto-lock piston 8 passes through second spline fit with tailcap 7, be provided with elastic component 9 between auto-lock piston 8 and the tailcap 7, elastic component 9 is compression spring, the one end and the auto-lock piston 8 of spring offset, the other end offsets with tailcap 7.
When 3 auto-locks to hydro-cylinder piston rod, the spring action of spring makes auto-lock piston 8 towards the direction motion of being close to hydro-cylinder piston rod 3, auto-lock piston 8 cooperatees through first spline with hydro-cylinder piston rod 3, simultaneously the rear end of auto-lock piston 8 cooperatees through the second spline with tail-hood 7, because tail-hood 7, auto-lock cylinder 4 and 1 three fixed connection of hydro-cylinder, consequently auto-lock piston 8 can't take place to rotate under the effect of second spline, hydro-cylinder piston rod 3 can't take place relative rotation in auto-lock piston 8 under the effect of first spline, thereby make hydro-cylinder piston rod 3 and hydro-cylinder end cover 2 unable rotation.
When the oil cylinder piston rod 3 is unlocked, oil is introduced into the self-locking oil cavity 5 from the oil port 6, the self-locking piston 8 moves towards the direction far away from the oil cylinder end cover 2 under the action of the oil pressure of hydraulic oil until the self-locking piston 8 is completely separated from the oil cylinder piston rod 3, the oil cylinder piston rod 3 can rotate, and the locking of the oil cylinder piston rod 3 is released.
In order to facilitate the matching of the self-locking piston 8 and the oil cylinder piston rod 3, a first guide hole 10 is formed in one end of the self-locking piston 8, the oil cylinder piston rod 3 is inserted into the first guide hole 10 and is in sliding fit with the first guide hole 10, a first external spline is arranged on the outer circumference of the self-locking piston 8, a first internal spline matched with the first external spline is arranged in the first guide hole 10, and when the first external spline is matched with the first internal spline, the oil cylinder piston rod 3 and the self-locking piston 8 cannot rotate relatively.
Meanwhile, in order to facilitate the matching of the self-locking piston 8 and the tail cover 7, the tail cover 7 is provided with a second guide hole 11, the self-locking piston 8 is inserted into the second guide hole 11, a second external spline is arranged on the self-locking piston 8, a second internal spline matched with the second external spline is arranged in the second guide hole 11, and when the second external spline is matched with the second internal spline, the self-locking piston 8 and the tail cover 7 cannot rotate relatively.
In order to reduce the installation space occupied by the compression spring and shorten the length of the self-locking cylinder barrel 4 and the tail cover 7, the self-locking piston 8 is provided with an installation hole 12, the installation hole 12 is located at the rear end of the self-locking piston 8, one end of the compression spring is assembled into the installation hole 12, the other end of the compression spring is abutted against the inner wall of the tail cover 7, when the self-locking piston 8 moves along the axial direction, the spring is compressed, and the installation hole 12 can improve the stability of the spring.
In order to facilitate the connection among the oil cylinder barrel 1, the self-locking cylinder barrel 4 and the tail cover 7, a first boss 13 which is abutted against the rear end face of the oil cylinder barrel 1 is arranged at the rear end of the self-locking cylinder barrel 4, the first boss 13 is fixedly connected with or integrally formed with the self-locking cylinder barrel 4, a second boss 14 which is abutted against the rear end face of the self-locking cylinder barrel 4 is arranged at the rear end of the tail cover 7, the second boss 14 is fixedly connected with or integrally formed with the tail cover 7, after the front end of the self-locking cylinder barrel 4 is assembled to the oil cylinder barrel 1, the first boss 13 is abutted against the rear end face of the oil cylinder barrel 1 to limit the self-locking cylinder barrel 4, after the front end of the tail cover 7 is assembled to the self-locking cylinder barrel 4, the second boss 14 is abutted against the rear end face of the first boss 13 to limit the tail cover 7, and the second boss 14, the first boss 13 and the oil cylinder barrel 1 are connected through screws.
In order to improve the sealing performance of the self-locking oil cavity 5, a first sealing ring 15 is arranged between the self-locking cylinder barrel 4 and the self-locking piston 8, a second sealing ring 16 is arranged between the self-locking cylinder barrel 4 and the oil cylinder barrel 1, and when oil is introduced into the self-locking oil cavity 5 to unlock the oil cylinder piston rod 3, the first sealing ring 15 and the second sealing ring 16 can avoid leakage of hydraulic oil and reduce loss of the hydraulic oil. And a third sealing ring 17 is arranged between the tail cover 7 and the self-locking cylinder barrel 4, so that the sealing property of the self-locking oil cavity 5 can be further improved, and the leakage of hydraulic oil between the tail cover 7 and the self-locking cylinder barrel 4 when the first sealing element fails is avoided.
In order to further improve the stability of the axial movement of the self-locking piston 8 from the self-locking cylinder 4, a guide ring 18 is arranged between the self-locking piston 8 and the self-locking cylinder 4, the guide ring 18 plays a certain guiding role when the self-locking piston 8 moves, and an annular groove for installing the guide ring 18 is arranged on the self-locking piston 8.
The working principle is as follows: under the effect of not having the oil pressure, the spring promotes self-locking piston 8 and removes toward the front end through the reaction force that self extrusion deformation produced, and the first external splines cooperation on self-locking piston 8's the first internal and external splines on and the hydro-cylinder piston rod 3, and the second external splines of self-locking piston 8 and the cooperation of the second internal splines of tail-hood 7, the swing hydro-cylinder was in mechanical auto-lock state this moment, and the piston rod of swing hydro-cylinder can't rotate.
When the oil port 6 provides oil pressure, hydraulic oil enters the self-locking oil cavity 5, the hydraulic oil generates backward thrust on the self-locking piston 8, the spring deformation force is overcome, the self-locking piston 8 is pushed to move backward, and at the moment, the first inner spline and the first outer spline of the self-locking piston 8 are completely separated from the first outer spline on the oil cylinder piston rod 3. The swing oil cylinder can rotate under the action of oil pressure in the oil cylinder, when the swing cylinder rotates to the other limit position, the oil port 6 stops supplying oil, the self-locking piston 8 moves forwards under the action of the external force of the spring, and then self-locking is formed again.
The utility model discloses a double spline mechanical locking structure of swing hydro-cylinder's beneficial effect has:
1. under the elastic action of elastic part 9, self-locking piston 8 and cylinder piston rod 3 pass through first spline fit, and self-locking piston 8 and tail-hood 7 pass through second spline fit for self-locking piston 8 and cylinder piston rod 3 can't rotate, thereby lock cylinder piston rod 3, and the locking reliability is high, for realizing the auto-lock through hydraulic circuit pressurize, installs more reliably, can not receive the influence of hydraulic component or inside seal spare.
2. The self-locking piston 8 is provided with a first guide hole 10, the tail cover 7 is provided with a second guide hole 11, and in the process that the self-locking piston 8 moves along the axial direction, the first guide hole 10 and the second guide hole 11 simultaneously guide the movement of the self-locking piston 8, so that the self-locking piston 8 is convenient to be matched with the oil cylinder piston rod 3 and the tail cover 7.
3. Through the arrangement of the first spline and the second spline, the locking and contact locking modes of the oil cylinder piston rod 3 are simple and reliable, the locking structure is simple, and the processing and the assembly are convenient.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined by the scope of the claims.
Claims (8)
1. The utility model provides a double spline mechanical locking structure of swing cylinder which characterized in that includes:
the oil cylinder comprises an oil cylinder barrel (1), wherein the oil cylinder barrel (1) is provided with an oil cylinder end cover (2), and an oil cylinder piston rod (3) penetrates through the oil cylinder end cover (2);
the self-locking cylinder barrel (4), the self-locking cylinder barrel (4) is fixedly connected with the oil cylinder barrel (1), a self-locking oil cavity (5) is formed between the self-locking cylinder barrel (4) and the oil cylinder end cover (2), an oil port (6) communicated with the self-locking oil cavity (5) is formed in the oil cylinder barrel (1), and one end of the self-locking cylinder barrel (4) is fixedly connected with a tail cover (7);
the self-locking piston (8) is movably arranged in the self-locking cylinder barrel (4) along the axial direction, one end of the self-locking piston (8) is matched with the oil cylinder piston rod (3) through a first spline, and the other end of the self-locking piston (8) is matched with the tail cover (7) through a second spline;
the elastic piece (9), the elastic piece (9) sets up between tail-hood (7) and auto-lock piston (8), the one end of elastic piece (9) offsets or is connected with auto-lock piston (8), and the other end offsets or is connected with tail-hood (7).
2. The double-spline mechanical locking structure of the swing oil cylinder as claimed in claim 1, wherein one end of the self-locking piston (8) is provided with a first guide hole (10) matched with the oil cylinder piston rod (3), the oil cylinder piston rod (3) is inserted into the first guide hole (10), the oil cylinder piston rod (3) is provided with a first external spline, and the first guide hole (10) is provided with a first internal spline matched with the first external spline.
3. The double-spline mechanical locking structure of the swing oil cylinder as claimed in claim 2, wherein the tail cover (7) is provided with a second guide hole (11), the self-locking piston (8) is inserted into the second guide hole (11), the self-locking piston (8) is provided with a second external spline, and the second guide hole (11) is provided with a second internal spline matched with the second external spline.
4. The double-spline mechanical locking structure of a swing cylinder according to claim 1, wherein the self-locking piston (8) is provided with a mounting hole (12), and one end of the elastic member (9) is fitted into the mounting hole (12).
5. The double-spline mechanical locking structure of the swing cylinder according to claim 1, wherein a plurality of elastic pieces (9) are arranged between the tail cover (7) and the self-locking piston (8), and the elastic pieces (9) are uniformly arranged at intervals.
6. The double-spline mechanical locking structure of the swing oil cylinder as claimed in claim 1, wherein the rear end of the self-locking cylinder barrel (4) is provided with a first boss (13) which abuts against the rear end face of the oil cylinder barrel (1), and the rear end of the tail cover (7) is provided with a second boss (14) which abuts against the rear end face of the self-locking cylinder barrel (4).
7. The double-spline mechanical locking structure of the swing oil cylinder as claimed in claim 1, wherein a first sealing ring (15) is arranged between the self-locking cylinder barrel (4) and the self-locking piston (8), and a second sealing ring (16) is arranged between the self-locking cylinder barrel (4) and the oil cylinder barrel (1).
8. The double-spline mechanical locking structure of the swing oil cylinder as claimed in claim 1, wherein a guide ring (18) is arranged between the self-locking piston (8) and the self-locking cylinder barrel (4), and an annular groove for installing the guide ring (18) is arranged on the self-locking piston (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223090768.1U CN218509843U (en) | 2022-11-21 | 2022-11-21 | Double-spline mechanical locking structure of swing oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223090768.1U CN218509843U (en) | 2022-11-21 | 2022-11-21 | Double-spline mechanical locking structure of swing oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218509843U true CN218509843U (en) | 2023-02-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223090768.1U Active CN218509843U (en) | 2022-11-21 | 2022-11-21 | Double-spline mechanical locking structure of swing oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218509843U (en) |
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2022
- 2022-11-21 CN CN202223090768.1U patent/CN218509843U/en active Active
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