CN220849916U - Anti-loosening structure - Google Patents
Anti-loosening structure Download PDFInfo
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- CN220849916U CN220849916U CN202322722698.5U CN202322722698U CN220849916U CN 220849916 U CN220849916 U CN 220849916U CN 202322722698 U CN202322722698 U CN 202322722698U CN 220849916 U CN220849916 U CN 220849916U
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- hole
- gasket
- spring seat
- small
- end cover
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- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000010720 hydraulic oil Substances 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of hydraulic plunger pump technology application and discloses an anti-loosening structure, which comprises a gasket, a screw and an end cover, wherein a long groove is formed in the screw, the gasket is arranged in the long groove, a through hole is formed in the center of the end cover, a step hole is formed in one end of the through hole, one end of the screw, which is provided with the long groove, penetrates through the through hole from one side of the end cover, which is provided with the step hole, and the gasket is positioned in the step hole.
Description
Technical Field
The utility model relates to the technical field of hydraulic plunger pump technology application, in particular to a locking structure.
Background
The servo plunger assembly is used as a variable mechanism of the closed plunger pump, directly controls the angle of a swash plate of the plunger pump, indirectly controls the displacement of the plunger pump, and in the application system of the closed plunger pump, the closed pump is directly connected with a motor, when a vehicle stops at idle speed, the closed plunger pump is required to have no flow output, and the angle of the swash plate is at a zero angle, so that the swash plate angle is controlled to be zero through the servo plunger assembly. When a driver operates the handle, the servo plunger assembly moves to drive the angle of the swash plate to change, the closed pump outputs flow, and the vehicle starts to run. The servo plunger repeatedly acts to control the angle of the swash plate, the closed pump outputs response flow, and the whole machine realizes set action.
As shown in FIG. 1, the large spring seat and the small spring seat are arranged in the cavity of the servo plunger 4, the large spring seat 5 on the left side is limited by the inner end surface of the servo plunger 4, the small spring seat 6 on the right side is limited by the snap spring arranged in the snap spring groove of the servo plunger, and at the moment, the spring has certain pre-pressing. One end face of the screw rod 2 is flatly attached to the inner wall of the large spring seat 5, the large nut 7 locks the screw rod 2 through threads and the end face of the small spring seat 6, no clearance is ensured between the inner end face of the servo plunger and the end face of the large spring seat, left-right movement of the servo plunger 4 is avoided, displacement control precision is influenced, and the small nut 12 tightly locks the large nut, so that looseness of the large nut 7 is prevented.
As shown in a structural schematic diagram of the servo plunger assembly installed in a pump body in fig. 2, a spacer bush 8 is installed in a servo plunger groove, a pin 9 is installed in the spacer bush 8, the pin 9 is in interference fit with a swash plate 10, when a driver operates a vehicle running handle, a left cavity 11 is provided with hydraulic oil to be flushed, the servo plunger 4 is pushed to move rightwards, the pins also move together, the swash plate 10 starts to swing to form a working angle, and the output flow of a closed pump is formed; because the screw rod 2 is fixed on the pump body through thread locking, the screw rod 2 is fixed, and when the servo plunger 4 moves horizontally to the right, the clamp spring pushes the small spring seat 6 to move rightwards, and the large nut 7 is separated from the end face of the small spring seat 6.
When the driver stops operating the machine handle, the oil pressure in the left cavity disappears, the middle compression spring is reset, the small spring seat 6 is pushed to move leftwards until the small spring seat contacts with the large nut 7, the small spring seat stops moving, and at the moment, the large nut receives the impact force of the small spring seat.
When the driver reversely operates the machine handle, hydraulic oil is poured into the right cavity 14, the servo plunger moves leftwards under the action of the oil pressure, the swash plate 10 swings reversely by an angle, and the closed pump outputs corresponding flow. When the servo plunger moves leftwards, the large spring seat moves leftwards under the pushing of the inner end face of the servo plunger, the end face of the screw rod 2 is separated from the inner end face of the large spring seat, and the large nut supports the small spring seat to compress the spring due to the fact that the screw rod is fixed.
When a driver stops operating the working handle of the machine, the hydraulic oil in the right cavity disappears, the middle spring is reset, the large spring seat 5 moves rightwards until the inner end face is limited by the end face of the screw rod 2, and the movement is stopped. At this time, the screw is impacted by the large spring seat force.
Therefore, in the above technology, the driver repeatedly operates the working handle of the machine, the internal parts of the servo plunger variable assembly of the plunger pump repeatedly perform the same movements, the acting force frequently and repeatedly impacts the large nut 7 and the screw 2, and the small nut 12 is used for locking, but the locking reliability is low, and the large nut still loosens after long-time use, so that the walking is abnormal.
Disclosure of utility model
The novel technical problem to be solved in use is that the reliability of an existing servo plunger anti-loosening structure is lower, and the problem that walking is abnormal due to loosening of a large nut still occurs when the servo plunger anti-loosening structure is used for a long time.
In order to solve the technical problems, the technical scheme of the utility model is to provide a locking structure, which comprises a gasket, a screw and an end cover, wherein the screw is provided with a long groove, the gasket is arranged in the long groove, the center of the end cover is provided with a through hole, one end of the through hole is provided with a step hole, one end of the screw, provided with the long groove, passes through the through hole from one side of the end cover, provided with the step hole, and the gasket is positioned in the step hole.
Through adopting above-mentioned technical scheme, change former nut locking structure into the gasket structure, through gasket and long recess cooperation, the gasket can not drop forever, and locking effect is obvious, and the reliability is higher, and can not influence and change servo plunger variable assembly's function and motion.
Optionally, the step hole comprises a large hole and a small hole, the small hole is adjacent to the through hole, and the large hole is adjacent to the small hole and is close to the outer end face of the end cover.
Optionally, the gasket is semi-cylindrical, the gasket is equipped with two and is located the macropore.
By adopting the technical scheme, the large holes are arranged to prevent the gasket from falling off in a free state.
Optionally, a short groove is formed in the screw, the short groove is adjacent to the long groove and is located at the outer side of the long groove, and the short groove is formed in the small hole.
Optionally, an O-ring is arranged in the short groove.
In summary, the original nut anti-loosening structure is changed into the gasket structure, the gasket is matched with the long groove, so that the gasket cannot fall off when impacted, the gasket cannot fall off in a free state by arranging the step hole on the end cover, the anti-loosening effect is obvious, the reliability is higher, and the functions and the movement modes of the servo plunger variable assembly cannot be influenced and changed.
Drawings
FIG. 1 is a schematic diagram of a servo plunger assembly with a prior nut locking structure;
FIG. 2 is a schematic diagram of a prior art nut lock structure servo plunger assembly installed in a closed pump;
FIG. 3 is a schematic view of the mounting assembly of the present utility model;
FIG. 4 is a schematic view of a gasket structure according to the present utility model;
FIG. 5 is a schematic view of the structure of the screw of the present utility model;
FIG. 6 is a schematic diagram of an end cap structure of the present utility model;
FIG. 7 is a schematic view of the installation structure of a locking structure servo plunger assembly in a closed pump according to the present utility model;
In the figure: 1. a gasket; 2. a screw; 21. a long groove; 22. a short groove; 3. an end cap; 31. a step hole; 4. a servo plunger; 5. a large spring seat; 6. a small spring seat; 7. a large nut; 8. a spacer bush; 9. a pin; 10. a swash plate; 11. a left cavity; 12. a small nut; 13. an O-ring; 14 right lumen.
Detailed Description
The utility model is described in further detail below in connection with fig. 1-7.
The utility model discloses a locking structure, referring to fig. 3-6, which comprises gaskets 1, a screw rod 2 and an end cover 3, wherein the screw rod 2 is provided with a long groove 21 and a short groove 22, the short groove 22 is adjacent to the long groove 21 and is positioned at the outer side of the long groove 21, the gaskets 1 are semi-cylindrical and are two, the two gaskets 1 are spliced and are arranged in the long groove 21, an O-shaped ring 13 is arranged in the short groove 22, a through hole is arranged at the center of the end cover 3, one end of the through hole is provided with a step hole 31, the step hole 31 comprises a big hole and a small hole, the small hole is adjacent to the through hole, the big hole is adjacent to the small hole and is close to the outer end face of the end cover 3, one end of the screw rod 2 provided with the long groove 21 penetrates through the through hole from one side of the end cover 3, the gasket 1 is positioned in the big hole, and the short groove 22 where the O-shaped ring 13 is positioned in the small hole.
Examples
When the anti-loosening structure is installed in a servo plunger assembly, as shown in fig. 3, the end face of a small spring seat 6 is attached to a servo plunger 4, the end face of a large spring seat 5 is limited by a clamp spring, the spring is precompressed at the moment, one end of a screw rod 2 is contacted with the end face of an inner hole of the small spring seat 6 on the left side, two gaskets 1 are assembled and placed in a long groove 21 on a cylindrical surface, an O-shaped ring 13 is assembled and placed in a short groove 22 on the cylindrical surface of the screw rod 2 for sealing, and hydraulic oil is prevented from leaking;
Then, as shown in fig. 7, the servo plunger assembly is installed in the closed pump, the end cover 3 is locked on the pump body through a screw, the screw rod 2 is screwed with the end cover 3 through threads, the cylindrical surface of the assembled O-shaped ring 13 is sealed with the small hole of the step hole 31 on the end cover 3 in a matched manner, the outer surface of the gasket 1 is connected with the large hole of the step hole 31 in a matched manner, and the outer cylindrical surface of the servo plunger assembly is matched with the hole of the pump body.
When a driver operates the walking handle, hydraulic oil is poured into the left cavity 11 as shown in fig. 7, acts on the left end face of the servo plunger 4 to push the servo plunger 4 to move rightwards, and the large spring seat 5 moves the compression spring rightwards together under the action of the clamp spring while the servo plunger 4 moves rightwards until the hydraulic pressure and the spring force are balanced, so that the swash plate 10 is pushed to rotate by a corresponding angle, and the closed pump outputs flow; because the large spring seat 5 moves rightwards, the gasket 1 is separated from the end face of the large spring seat 5, the gasket 1 is in a free state at the moment, and the large hole of the step hole 31 on the end cover 3 prevents the gasket 1 from falling off in the free state;
When the driver stops operating the handle, the large spring seat 5 moves left under the action of spring reset until the end face of the large spring seat 5 contacts with the gasket 1, and although the semicircular gasket 1 is impacted by force at this time, the semicircular gasket 1 can not fall off as long as the screw 2 has enough strength, and the anti-loosening effect is obvious.
When a driver reversely operates the handle, hydraulic oil works in the right cavity 14 and acts on the right end face of the servo plunger 4 to push the servo plunger 4 to move leftwards, the small spring seat 6 is pushed by the end face of the servo plunger 4 to move leftwards, the large spring seat 5 is limited by the semicircular gasket 1, the spring is compressed until the compressed spring force is balanced with hydraulic pressure, and the swash plate 10 swings by a corresponding angle to output flow of the closed pump.
When the driver stops operating the handle, the hydraulic oil acting on the right end face of the servo plunger 4 disappears, and the small spring seat 6 moves rightwards under the action of the middle spring reset until the inner end face of the small spring seat 6 is limited by the screw rod 2.
In summary, the original anti-loosening structure of the nut is changed into the gasket structure, the gasket 1 is matched with the long groove 21, so that the gasket 1 cannot fall off when impacted, the gasket 1 cannot fall off in a free state by arranging the step hole 31 on the end cover 3, the anti-loosening effect is obvious, the reliability is high, and the functions and the movement modes of the servo plunger variable assembly cannot be influenced and changed.
It should be noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present utility model may be modified or substituted without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered in the scope of the claims of the present utility model.
Claims (5)
1. The utility model provides a locking structure, its characterized in that, including gasket (1), screw rod (2) and end cover (3), be equipped with long recess (21) on screw rod (2), gasket (1) are established in long recess (21), end cover (3) central point puts and is equipped with the through-hole, the one end of through-hole is equipped with step hole (31), the one end that screw rod (2) was equipped with long recess (21) passes the through-hole from one side that end cover (3) was equipped with step hole (31), just gasket (1) are located step hole (31).
2. The anti-loosening structure of claim 1, wherein the stepped bore (31) includes a large bore and a small bore, the small bore being adjacent to the through bore, the large bore being adjacent to the small bore and being adjacent to the outer end face of the end cap (3).
3. The anti-loosening structure of claim 2, wherein the gasket (1) is semi-cylindrical, and the gasket (1) is provided with two large holes.
4. The anti-loosening structure according to claim 2, wherein the screw (2) is provided with a short groove (22), the short groove (22) is adjacent to the long groove (21) and is located outside the long groove (21), and the short groove (22) is provided in the small hole.
5. The anti-loosening structure of claim 4, wherein an O-ring (13) is provided in the short groove (22).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202322722698.5U CN220849916U (en) | 2023-10-10 | 2023-10-10 | Anti-loosening structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202322722698.5U CN220849916U (en) | 2023-10-10 | 2023-10-10 | Anti-loosening structure |
Publications (1)
Publication Number | Publication Date |
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CN220849916U true CN220849916U (en) | 2024-04-26 |
Family
ID=90775354
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN202322722698.5U Active CN220849916U (en) | 2023-10-10 | 2023-10-10 | Anti-loosening structure |
Country Status (1)
Country | Link |
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CN (1) | CN220849916U (en) |
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2023
- 2023-10-10 CN CN202322722698.5U patent/CN220849916U/en active Active
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