CN210599654U - Oil cylinder sealing structure - Google Patents
Oil cylinder sealing structure Download PDFInfo
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- CN210599654U CN210599654U CN201921367401.5U CN201921367401U CN210599654U CN 210599654 U CN210599654 U CN 210599654U CN 201921367401 U CN201921367401 U CN 201921367401U CN 210599654 U CN210599654 U CN 210599654U
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Abstract
The utility model discloses an oil cylinder sealing structure belongs to mining equipment technical field, including front end housing, rear end cap and cylinder, its characterized in that: the piston rod penetrates through the front end cover and extends to the outer side of the oil cylinder; a square through hole is formed in the center of the front end face of the front end cover, buffer chambers are symmetrically arranged on two sides of the square through hole, a sliding block penetrates through the square through hole in an axial line mode, the sliding block extends into the buffer chambers, and sealing connecting pieces are arranged on the sliding block and the side walls of the buffer chambers; the drawing hole and the piston rod are also provided with a sealing ring; the utility model has the advantages that: the device is provided with a hydraulic cylinder of a hydraulic rod capable of swinging along the horizontal direction, a hinged connecting rod between the hydraulic rod and the cam is omitted, and the device is used for directly connecting the cam in a narrow space; the sealing structure which is suitable for the hydraulic rod capable of swinging along the horizontal direction is arranged, so that the sealing effect of stretching along the axis direction and swinging perpendicular to the axis direction under the swinging condition is ensured.
Description
The technical field is as follows:
the utility model belongs to the technical field of mining equipment, more specifically relates to an oil cylinder seal structure.
Background art:
the hydraulic cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and makes linear reciprocating motion. It has simple structure and reliable operation. When it is used to implement reciprocating motion, it can omit speed-reducing device, and has no transmission gap, and its motion is stable, so that it can be extensively used in various mechanical hydraulic systems.
Because the hydraulic cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and does linear reciprocating motion, a circular motion element is required in the actual production process, a connecting rod needs to be hinged to a piston rod of the hydraulic cylinder at the moment, then the connecting rod is hinged to the cam, and the circular motion of the cam is realized through the piston rod which does the linear reciprocating motion.
However, in a narrow coal mine environment, the use of the connecting rod is sometimes limited in space, and how to directly drive the piston rod which makes linear reciprocating motion to make circular motion of the cam is a key point of research; similar pistons are present in the engine of an automobile, but because the hydraulic cylinder drives the piston to move through hydraulic oil, how to ensure the sealing in both the axial direction of the piston rod and the swinging direction of the piston rod is a key point of research and is also difficult.
The utility model has the following contents:
in order to solve the problems and overcome the defects of the prior art, the utility model provides an oil cylinder sealing structure;
the first technical problem to be solved is that: in narrow coal mine environments, sometimes the space limits the use of the connecting rod, and at the moment, how to drive the piston rod which moves linearly and reciprocally to directly drive the cam to do circular motion;
the second technical problem to be solved is that: because the hydraulic cylinder drives the piston to move through hydraulic oil, how to ensure the sealing in the two aspects of the axis direction of the piston rod and the swing direction of the piston rod is a key point of research and is also a difficult point.
The utility model provides a concrete technical scheme of above-mentioned technical problem does: the oil cylinder sealing structure comprises a front end cover, a rear end cover and a cylinder barrel, wherein the front end cover and the rear end cover are fixedly and hermetically connected with the cylinder barrel through fixing screw rods, a piston which reciprocates is arranged in the cylinder barrel, and the front end cover and the rear end cover are respectively provided with a liquid port connected with the cylinder barrel; the method is characterized in that: one end of the piston is provided with a piston rod in a hinged mode, and the piston rod penetrates through the front end cover and extends to the outer side of the oil cylinder;
the center of the front end face of the front end cover is provided with a square through hole, two sides of the square through hole are symmetrically provided with buffer chambers, a sliding block penetrates through the square through hole in an axial line mode, the sliding block extends into the buffer chambers, the cross section of the sliding block is circular, and the upper end and the lower end of the sliding block are provided with sealing blocks in sliding sealing fit with the wall of the front end cover; the side walls of the sliding block and the buffer chamber are provided with sealing connecting pieces;
the sealing connecting piece is embedded in a blind hole formed in the side wall of the buffer chamber, a sliding block and a sealing block are arranged along the axis of the blind hole in a penetrating manner, and the sealing connecting piece comprises a sealing gasket and an annular pressing plate; the sealing gasket is provided with a hole which is in sealing fit with the sliding block and the sealing block, the side end face of the sealing gasket is in sealing fit with the inner wall of the blind hole, and the annular pressing plate is pressed on the outer side of the sealing gasket and is fixed with the inner wall of the blind hole through threaded connection;
the slider is provided with a drawing hole perpendicular to the axis direction for drawing the piston rod, and the drawing hole and the piston rod are further provided with sealing rings.
Furthermore, the inner diameter of the annular pressure plate is larger than the outer diameter of the sealing block and smaller than the outer diameter of the sealing gasket.
Further, the axial cross-section of sealing washer is the right trapezoid structure of symmetry setting, and right trapezoid's hypotenuse and the outer wall cooperation of piston rod, and the right trapezoid minor face sets up inwards.
Further, the piston rod is directly connected to the cam by means of an articulation.
Furthermore, the bottoms of the buffer chambers symmetrically arranged on two sides of the square through hole are connected through air ducts.
Furthermore, the left end face and the right end face of the front end cover are also provided with maintenance covers for maintaining the sealing connection with the buffer chamber.
The utility model has the advantages that:
the hydraulic cylinder with the hydraulic rod capable of swinging in the horizontal direction is creatively arranged, a hinged connecting rod between the hydraulic rod and the cam is omitted, and the hydraulic cylinder is used for being directly connected with the cam in a narrow space;
the sealing structure of the hydraulic rod capable of swinging along the horizontal direction is creatively arranged, and the sealing effect of stretching along the axis direction and swinging perpendicular to the axis direction under the swinging condition is guaranteed.
Description of the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of an embodiment of the present invention;
FIG. 3 is a schematic structural view of another embodiment of the present invention;
FIG. 4 is a schematic structural view of the front end cover of the present invention;
FIG. 5 is a schematic view of the structure of the sealing connector of the present invention;
FIG. 6 is a schematic view of the structure of the sealing ring of the present invention; in the drawings:
1. a liquid port; 2. a rear end cap; 3. a cylinder barrel; 4. fixing a screw rod; 5. a piston; 6. a front end cover; 7. a piston rod; 8. a cam; 10. a sealing connection; 11. a sealing block; 12. a seal ring; 13. a slider; 14. a square through hole; 15. a buffer chamber; 16. maintaining the cover; 17. an air duct; 18. blind holes; 19. a gasket; 20. and an annular pressure plate.
The specific implementation mode is as follows:
to further clarify the objects, aspects and advantages of the present invention, a more complete description of the invention will now be rendered by reference to figures 1-6. In describing the present invention, it should be understood that the terms "center", "upper", "lower", "left", "right", "rear", "lower left", "upper right", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the scope of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The utility model discloses a concrete implementation mode: the oil cylinder sealing structure comprises a front end cover 6, a rear end cover 2 and a cylinder barrel 3, wherein the front end cover 6 and the rear end cover 2 are fixedly and hermetically connected with the cylinder barrel 3 through a fixed screw rod 4, a piston 5 which reciprocates is arranged in the cylinder barrel 3, and the front end cover 6 and the rear end cover 2 are respectively provided with a liquid port 1 connected with the cylinder barrel 3; the method is characterized in that: one end of the piston 5 is provided with a piston rod 7 in a hinged mode, and the piston rod 7 penetrates through the front end cover 6 and extends to the outer side of the oil cylinder;
a square through hole 14 is formed in the center of the front end face of the front end cover 6, buffer chambers 15 are symmetrically arranged on two sides of the square through hole 14, and maintenance covers 16 for maintaining the sealing connection with the buffer chambers 15 are further formed in the left end face and the right end face of the front end cover 6;
a sliding block 13 penetrates through the axis of the square through hole 14, the sliding block 13 extends into a buffer chamber 15, the cross section of the sliding block 13 is circular, and sealing blocks 11 in sliding sealing fit with the wall of the front end cover 6 are arranged at the upper end and the lower end of the sliding block 13; the side walls of the sliding block 13 and the buffer chamber 15 are provided with sealing connecting pieces 10, and the bottoms of the buffer chambers 15 symmetrically arranged on two sides of the square through hole 14 are connected through air ducts 17;
the sealing connecting piece 10 is embedded in a blind hole 18 arranged on the side wall of the buffer chamber 15, a sliding block 13 and a sealing block 11 are arranged along the axis of the blind hole 18 in a penetrating way, the sealing connecting piece 10 comprises a sealing gasket 19 and an annular pressing plate 20, the inner diameter of the annular pressing plate 20 is larger than the outer diameter of the sealing block 11 and smaller than the outer diameter of the sealing gasket 19,
the sealing gasket 19 is provided with a hole which is in sealing fit with the sliding block 13 and the sealing block 11, the side end face of the sealing gasket 19 is in sealing fit with the inner wall of the blind hole 18, and the annular pressing plate 20 is pressed on the outer side of the sealing gasket 19 and is fixed with the inner wall of the blind hole 18 through threaded connection;
a drawing hole for drawing the piston rod 7 is formed in the sliding block 13 perpendicular to the axis direction, a sealing ring 12 is further arranged between the drawing hole and the piston rod 7, the axial section of the sealing ring 12 is of a symmetrically-arranged right-angled trapezoid structure, the oblique side of the right-angled trapezoid is matched with the outer wall of the piston rod 7, the short side of the right-angled trapezoid is arranged inwards, and the piston rod 7 is directly connected with the cam 8 in a hinged mode;
it should be noted that the utility model relates to a sealing structure of an oil cylinder, when in specific work,
1. connecting the liquid ports 1 of the front end cover 6 and the rear end cover 2 with a hydraulic station through oil guide pipes, and realizing the linear reciprocating operation of the piston 5 by injecting and extracting hydraulic oil, wherein at the moment, a piston rod 7 is arranged at one end of the piston 5 in a hinged mode, the piston rod 7 is directly connected with a cam 8 in a hinged mode, and at the moment, the linear reciprocating operation directly drives the cam 8 to rotate through the piston rod 7;
2. in the process, the drawing hole and the piston rod 7 are also provided with the sealing ring 12, the axial section of the sealing ring 12 is of a symmetrically arranged right-angled trapezoid structure, the oblique side of the right-angled trapezoid is matched with the outer wall of the piston rod 7, and the short side of the right-angled trapezoid is arranged inwards, so that the problem of liquid leakage caused by the swinging and drawing of the piston rod 7 is effectively solved;
3. the piston rod 7 swings to drive the sliding block 13 to slide along the axis of the square through hole 14, and the sealing blocks 11 which are in sliding sealing fit with the wall of the front end cover 6 are arranged at the upper end and the lower end of the sliding block 13, so that hydraulic oil is effectively prevented from overflowing along the surface of the sliding block 13;
4. the two sides of the square through hole 14 are symmetrically provided with the buffer chambers 15, the swing of the slide block 13 runs in the symmetrically arranged buffer chambers 15, the problem that the space requirements on the two sides are increased due to the swing is solved, particularly, the buffer chambers 15 play a role in buffering, the situation that after oil leakage due to the reciprocating motion of the slide block 13 is brought out of the outer side of the equipment along with the swing of the slide block 13, overflowing hydraulic oil can flow to the buffer chambers 15 and reciprocate in the air guide pipe 17 along with the change of the air pressure of the buffer chambers 15 is prevented;
5. in order to prevent the problem of oil leakage caused by the reciprocating motion of the sliding block 13, the sealing device is further provided with a sealing connecting piece 10, the sealing connecting piece 10 is embedded in a blind hole 18 formed in the side wall of the buffer chamber 15, the sliding block 13 and the sealing block 11 penetrate through the axis of the blind hole 18, a hole in sealing fit with the sliding block 13 and the sealing block 11 is formed in the sealing gasket 19, the side end face of the sealing gasket 19 is in sealing fit with the inner wall of the blind hole 18, and an annular pressing plate 20 is pressed on the outer side of the sealing gasket 19 and fixed with the inner wall of the blind hole 18 through threaded; the sealing effect of the sliding block 13 and the blind hole 18 of the buffer chamber 15 is greatly improved, and the sealing effect of stretching along the axis direction and swinging perpendicular to the axis direction under the swinging condition is ensured.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. An oil cylinder sealing structure comprises a front end cover (6), a rear end cover (2) and a cylinder barrel (3), wherein the front end cover (6) and the rear end cover (2) are fixedly and hermetically connected with the cylinder barrel (3) through a fixed screw rod (4), a piston (5) which reciprocates is arranged in the cylinder barrel (3), and the front end cover (6) and the rear end cover (2) are respectively provided with a liquid port (1) connected with the cylinder barrel (3); the method is characterized in that: a piston rod (7) is arranged at one end of the piston (5) in a hinged mode, and the piston rod (7) penetrates through the front end cover (6) and extends to the outer side of the oil cylinder;
a square through hole (14) is formed in the center of the front end face of the front end cover (6), buffer chambers (15) are symmetrically arranged on two sides of the square through hole (14), a sliding block (13) penetrates through the square through hole (14) in an axial mode, the sliding block (13) extends into the buffer chambers (15), the cross section of the sliding block (13) is circular, and sealing blocks (11) in sliding sealing fit with the wall of the front end cover (6) are arranged at the upper end and the lower end of the sliding block (13); the side walls of the sliding block (13) and the buffer chamber (15) are provided with a sealing connecting piece (10);
the sealing connecting piece (10) is embedded in a blind hole (18) formed in the side wall of the buffer chamber (15), a sliding block (13) and a sealing block (11) are arranged along the axis of the blind hole (18) in a penetrating mode, and the sealing connecting piece (10) comprises a sealing gasket (19) and an annular pressing plate (20); the sealing gasket (19) is provided with a hole which is in sealing fit with the sliding block (13) and the sealing block (11), the side end face of the sealing gasket (19) is in sealing fit with the inner wall of the blind hole (18), and the annular pressing plate (20) is pressed on the outer side of the sealing gasket (19) and is fixed with the inner wall of the blind hole (18) through threaded connection;
the sliding block (13) is perpendicular to the axis direction and is provided with a drawing hole for drawing the piston rod (7), and the drawing hole and the piston rod (7) are further provided with a sealing ring (12).
2. The cylinder seal structure according to claim 1, characterized in that the inner diameter of the annular pressure plate (20) is larger than the outer diameter of the seal block (11) and smaller than the outer diameter of the seal gasket (19).
3. The oil cylinder sealing structure according to claim 1, characterized in that the axial section of the sealing ring (12) is a symmetrically arranged right trapezoid structure, the oblique side of the right trapezoid is matched with the outer wall of the piston rod (7), and the short side of the right trapezoid is arranged inwards.
4. Cylinder sealing structure according to claim 3, characterised in that the piston rod (7) is directly connected to the cam (8) by means of an articulated joint.
5. The oil cylinder sealing structure according to claim 1, characterized in that the bottoms of the buffer chambers (15) symmetrically arranged on both sides of the square through hole (14) are connected through air ducts (17).
6. The oil cylinder sealing structure according to claim 1, characterized in that the left and right end faces of the front end cover (6) are further provided with maintenance covers (16) for maintaining the sealing connection with the buffer chamber (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921367401.5U CN210599654U (en) | 2019-08-22 | 2019-08-22 | Oil cylinder sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921367401.5U CN210599654U (en) | 2019-08-22 | 2019-08-22 | Oil cylinder sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210599654U true CN210599654U (en) | 2020-05-22 |
Family
ID=70720064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921367401.5U Active CN210599654U (en) | 2019-08-22 | 2019-08-22 | Oil cylinder sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210599654U (en) |
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2019
- 2019-08-22 CN CN201921367401.5U patent/CN210599654U/en active Active
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