CN216830670U - Hydraulic dismounting type cylindrical surface interference connection structure - Google Patents

Hydraulic dismounting type cylindrical surface interference connection structure Download PDF

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Publication number
CN216830670U
CN216830670U CN202122854146.0U CN202122854146U CN216830670U CN 216830670 U CN216830670 U CN 216830670U CN 202122854146 U CN202122854146 U CN 202122854146U CN 216830670 U CN216830670 U CN 216830670U
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section
hydraulic
hole
connection structure
cylindrical surface
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CN202122854146.0U
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郑小华
向本银
林静
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Weichai Heavy Machinery Co Ltd
Chongqing Weichai Engine Co Ltd
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Weichai Heavy Machinery Co Ltd
Chongqing Weichai Engine Co Ltd
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Abstract

The utility model discloses a hydraulic dismounting type cylindrical surface interference connection structure which comprises an accommodating part with a cylindrical hole and a cylindrical accommodated part matched with the cylindrical hole, wherein the accommodating part is provided with an oil filling hole, an annular oil groove is arranged on the inner wall of the cylindrical hole, a hydraulic oil cavity is enclosed by the accommodated part and the oil groove, and the hydraulic oil cavity is communicated with the oil filling hole; the hydraulic oil cavity is arranged in the cylinder hole, the cylinder hole is in clearance fit with the cylinder hole, the contained part is connected with the cylinder hole through the clearance section, and the contained part are assembled and disassembled hydraulically. The hydraulic dismounting type cylindrical surface interference connection structure solves the technical problem that the cylindrical surface interference connection structure is inconvenient to dismount and mount, and is simple in structure, convenient to operate and high in reliability.

Description

Hydraulic dismounting type cylindrical surface interference connection structure
Technical Field
The utility model relates to the technical field of cylindrical surface interference connection structures, in particular to a hydraulic dismounting type cylindrical surface interference connection structure.
Background
In the mechanism connection, the cylindrical surface interference connection structure has the characteristics of simple structure, high centering precision, strong bearing capacity and the like, so that the mechanism is generally applied to occasions with higher impact and vibration, but the application range of the mechanism is limited due to inconvenient disassembly and assembly, and the mechanism is not generally disassembled after the assembly is completed in practical application.
At present, a cylindrical surface interference fit connection structure is usually assembled and disassembled by adopting a temperature difference assembling method or a traditional hydraulic assembling method, a matching surface can be scratched by the temperature difference assembling method in the disassembling process, parts are easy to damage, and the reliability is poor; although the traditional hydraulic dismounting method is not easy to damage parts, a sealing tool for sealing hydraulic oil needs to be added on the end face of the containing part, dismounting is achieved through the sealing tool, the process is complex, and the structure is complex.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model provides a hydraulic dismounting type cylindrical surface interference connection structure, which solves the technical problem that the cylindrical surface interference connection structure is inconvenient to dismount and mount, and has the advantages of simple structure, convenience in operation and high reliability.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:
The hydraulic detachable cylindrical surface interference connection structure comprises an accommodating part with a cylindrical hole and a cylindrical accommodated part matched with the cylindrical hole, wherein the accommodating part is provided with an oil filling hole, an annular oil groove is formed in the inner wall of the cylindrical hole, a hydraulic oil cavity is enclosed by the accommodated part and the oil groove, and the hydraulic oil cavity is communicated with the oil filling hole; the hydraulic oil cavity is arranged in the cylinder hole, the cylinder hole is in clearance fit with the cylinder hole, the contained part is connected with the cylinder hole through the clearance section, and the contained part are assembled and disassembled hydraulically.
The sealing structure comprises an annular mounting groove arranged on the gap section and a sealing ring arranged in the annular mounting groove.
The annular mounting groove divides the gap section into a transition section and a guide section, the axial width of the annular mounting groove is a preset value a, the axial width of the transition section is a preset value b, and b is greater than a.
The oil groove divides the cylindrical hole into a first matching section and a second matching section, the axial width of the first matching section is a preset value A, the axial width of the oil groove is a preset value B, the axial width of the second matching section is a preset value C, and C is (1.8-2.1) A.
After the containing piece and the contained piece are assembled, the interference section is in interference fit with the first fit section and part of the second fit section, the transition section is in clearance fit with the rest part of the second fit section, and the axial width P of the transition section in clearance fit with the second fit section2=a+b-P1,P1The preset value is equal to the sum of the axial width a of the annular mounting groove and the axial width of the part, not matched with the second matching section, of the transition section; the axial width P of the interference section in interference fit with the second fit section3=C-P2
Wherein the oil groove is arranged at the gravity center position of the containing piece.
Wherein, the oil groove is the arc groove.
The interference section and the clearance section are in smooth transition connection through an inclined plane or an arc surface.
Wherein, the oil filler point is the screw hole.
Wherein, the sealing washer is the O shape sealing washer.
By adopting the technical scheme, the utility model has the beneficial effects that:
according to the hydraulic dismounting type cylindrical surface interference connection structure provided by the utility model, the sealing structure is arranged on the gap section of the contained piece, so that when the contained piece and the contained piece are dismounted in a hydraulic mode, a sealing tool is not needed, hydraulic oil in a hydraulic oil cavity is sealed through the self sealing structure, parts can not be damaged, and the cylindrical surface interference connection structure can be dismounted freely.
Drawings
FIG. 1 is a schematic structural view of a hydraulic detachable cylindrical surface interference connection structure of the present invention;
FIG. 2 is a schematic view of the construction of the container of FIG. 1;
FIG. 3 is a schematic view of the structure of the contained member of FIG. 1;
FIG. 4 is a schematic view of a first state of disassembly (or assembly) of the hydraulic disassembly-assembly type cylindrical surface interference fit connection structure of the utility model;
FIG. 5 is a schematic diagram of a second state of disassembly (or assembly) of the hydraulic disassembly-assembly type cylindrical surface interference connection structure of the utility model;
FIG. 6 is an enlarged view of section E of FIG. 5;
in the figure: 1. a containment member; 11. a first mating segment; 12. an oil sump; 13. a second mating segment; 14. an oil filler hole; 2. a contained member; 21. an interference section; 22. a transition section; 23. an annular mounting groove; 24. a guide section; 3. and (5) sealing rings.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
As shown in fig. 1 to fig. 6, the hydraulic detachable type interference connection structure with cylindrical surface comprises a containing part 1 with a cylindrical hole and a cylindrical contained part 2 matched with the cylindrical hole, wherein the containing part 1 is provided with an oil filling hole 14, the oil filling hole 14 is a threaded hole, an annular oil groove 12 is arranged on the inner wall of the cylindrical hole, when the contained part 2 is installed in the cylindrical hole, the containing part 2 and the oil groove 12 enclose a hydraulic oil chamber, and the hydraulic oil chamber is communicated with the oil filling hole 14.
In order to guarantee reliability and stability when hydraulic pressure dismouting, this embodiment sets up oil groove 12 in the barycentric position of containing 1, and sets up oil groove 12 into the arc wall.
In this embodiment, the oil groove 12 divides the cylindrical hole into a first fitting section 11 and a second fitting section 13, the axial width of the first fitting section 11 is a preset value a, the axial width of the oil groove 12 is a preset value B, and the axial width of the second fitting section 13 is a preset value C, where C is (1.8-2.1) a.
By containing 2 including the interference section 21 and the clearance section that link together, interference section 21 and 11 interference fit in cylinder hole, clearance section and 11 clearance fit in cylinder hole are provided with seal structure on the clearance section, hydraulic pressure dismouting containing 1 and by when containing 2, seal structure is used for sealing the hydraulic pressure oil pocket. Through setting up seal structure, when hydraulic pressure dismouting is held 1 and is held 2, need not with the help of sealed frock, can realize neither damaging spare part can freely the dismouting again.
In order to prevent stress concentration and improve the strength of the accommodated piece 2, the interference section 21 and the clearance section in the embodiment are in smooth transition connection through an inclined plane or an arc surface.
The sealing structure in the embodiment comprises an annular mounting groove 23 arranged on the gap section and a sealing ring 3 arranged in the annular mounting groove 23, wherein the annular mounting groove 23 divides the gap section into a transition section 22 and a guide section 24, the axial width of the annular mounting groove 23 is a preset value a, the axial width of the transition section 22 is a preset value b, and b is greater than a.
Because the O-ring is rich in elasticity and resilience, has a good sealing effect, and is widely used in a hydraulic system, the O-ring 3 in this embodiment is preferably an O-ring.
After the containing piece 1 and the contained piece 2 in the embodiment are assembled, the interference section 21 is in interference fit with the first matching section 11 and part of the second matching section 13The transition section 22 is in clearance fit with the rest part of the second matching section 13, wherein the axial width P of the transition section 22 in clearance fit with the second matching section 132=a+b-P1,P1Is a preset value and is equal to the sum of the axial width a of the annular mounting groove 23 and the axial width of the part of the transition section 22 which is not matched with the second matching section 13; axial width P of interference section 21 and second matching section 13 in interference fit3=C-P2
The constraint sizes of the containing part 1 and the contained part 2 determined by the method can realize the free disassembly and assembly of the containing part 1 and the contained part 2, and if a certain rotation torque is applied to the containing part 1 or the contained part 2, the angle adjustment can also be realized.
In the dismounting process, as shown in fig. 4, the first state diagram of dismounting (or assembling) of the hydraulic dismounting cylindrical surface interference connection structure is shown, at this time, the interference section 21 and the second matching section 13 are in a critical state of being separated from (or matched with) each other, and the axial width Δ of the guide section 24 and the second matching section 13 in clearance fit is shown 1P3-P1, in which case the sealing ring 3 already takes part in sealing the hydraulic oil chamber to prevent leakage of hydraulic oil, Δ is preferred to ensure the stability of the assembly and disassembly1More than or equal to 2 mm; as shown in fig. 5 and 6, the second state diagram of the disassembly (or assembly) of the hydraulic disassembly-and-assembly type cylindrical surface interference connection structure is shown, at this time, the interference section 21 and the first matching section 11 are in a critical state of being separated from (or matched with) each other, and the distance Δ from the guide section 24 to the oil groove 122When the pressure in the hydraulic oil chamber is higher than that in the pressure range of P1+ P2+ P3-A-B, the sealing ring 3 can still participate in sealing the hydraulic oil chamber to prevent the hydraulic oil from leaking, and delta is preferably selected to ensure the stability of assembly and disassembly2Not less than 0.9 a. In the whole assembling and disassembling process, the sealing ring 3 can always seal the hydraulic oil cavity to prevent hydraulic oil from leaking.
According to the embodiment, when the containing part 1 and the contained part 2 are disassembled and assembled in a hydraulic mode, hydraulic oil in a hydraulic oil cavity can be sealed through the sealing structure of the hydraulic oil cavity, the hydraulic oil cavity can be disassembled and assembled freely without a sealing tool, the technical problem that the cylindrical surface interference connection structure is inconvenient to disassemble and assemble is solved, the free disassembly and assembly is achieved, the structure is simple, the operation is convenient, and the reliability is high.
The present invention is not limited to the above-described embodiments, and those skilled in the art will be able to make various modifications without departing from the spirit and scope of the present invention.

Claims (10)

1. The hydraulic dismounting type cylindrical surface interference connection structure comprises an accommodating piece with a cylindrical hole and a cylindrical accommodated piece matched with the cylindrical hole, and is characterized in that,
the containing part is provided with an oil filling hole, an annular oil groove is formed in the inner wall of the cylindrical hole, the contained part and the oil groove enclose a hydraulic oil cavity, and the hydraulic oil cavity is communicated with the oil filling hole;
the hydraulic oil cavity is formed by connecting the cylinder hole and the cylinder hole, the cylinder hole is arranged in the cylinder hole, the cylinder hole is communicated with the cylinder hole, and the cylinder hole is communicated with the cylinder hole.
2. The hydraulic demountable cylindrical interference connection of claim 1, wherein the seal arrangement includes an annular mounting groove disposed on the clearance section and a seal ring disposed in the annular mounting groove.
3. The hydraulic detachable cylindrical surface interference connection structure according to claim 2, wherein the annular installation groove divides the gap section into a transition section and a guiding section, the axial width of the annular installation groove is a preset value a, the axial width of the transition section is a preset value b, and b > a.
4. The hydraulic detachable cylindrical surface interference connection structure according to claim 3, wherein the oil groove divides the cylindrical hole into a first fitting section and a second fitting section, the axial width of the first fitting section is a preset value A, the axial width of the oil groove is a preset value B, and the axial width of the second fitting section is a preset value C which is (1.8-2.1) A.
5. The hydraulic detachable cylindrical surface interference connection structure according to claim 4, wherein after the containing piece and the contained piece are assembled, the interference section is in interference fit with the first fitting section and a part of the second fitting section, the transition section is in clearance fit with the rest of the second fitting section,
the axial width P of the transition section in clearance fit with the second fit section2=a+b-P1,P1The preset value is equal to the sum of the axial width a of the annular mounting groove and the axial width of the part, not matched with the second matching section, of the transition section;
the axial width P of the interference section in interference fit with the second fit section3=C-P2
6. The hydraulic detachable cylindrical surface interference connection structure according to claim 1, wherein the oil groove is provided at a position of a center of gravity of the housing.
7. The hydraulic detachable cylindrical surface interference connection structure according to claim 6, wherein the oil groove is an arc-shaped groove.
8. The hydraulic detachable cylindrical surface interference connection structure according to claim 1, wherein the interference section and the clearance section are connected in a smooth transition manner through an inclined surface or a circular arc surface.
9. The hydraulic demountable cylindrical surface interference connection structure of claim 1, wherein the oil injection hole is a threaded hole.
10. The hydraulic demountable cylindrical surface interference connection structure of claim 2, wherein the sealing ring is an O-ring.
CN202122854146.0U 2021-11-19 2021-11-19 Hydraulic dismounting type cylindrical surface interference connection structure Active CN216830670U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202122854146.0U CN216830670U (en) 2021-11-19 2021-11-19 Hydraulic dismounting type cylindrical surface interference connection structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202122854146.0U CN216830670U (en) 2021-11-19 2021-11-19 Hydraulic dismounting type cylindrical surface interference connection structure

Publications (1)

Publication Number Publication Date
CN216830670U true CN216830670U (en) 2022-06-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202122854146.0U Active CN216830670U (en) 2021-11-19 2021-11-19 Hydraulic dismounting type cylindrical surface interference connection structure

Country Status (1)

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CN (1) CN216830670U (en)

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