CN219932773U - Hydraulic expansion sleeve structure - Google Patents
Hydraulic expansion sleeve structure Download PDFInfo
- Publication number
- CN219932773U CN219932773U CN202321267059.8U CN202321267059U CN219932773U CN 219932773 U CN219932773 U CN 219932773U CN 202321267059 U CN202321267059 U CN 202321267059U CN 219932773 U CN219932773 U CN 219932773U
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- CN
- China
- Prior art keywords
- piston
- cylinder body
- expansion sleeve
- hole
- sleeve
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000007789 sealing Methods 0.000 claims description 8
- 238000011900 installation process Methods 0.000 abstract description 9
- 239000003921 oil Substances 0.000 description 20
- 239000010720 hydraulic oil Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Abstract
The utility model relates to a hydraulic expansion sleeve structure, and relates to the technical field of expansion sleeves. The device comprises a middle taper sleeve, a piston, a cylinder body and an oil filling hole; the cylinder body and the piston are annular, and a sealed oil cavity is formed between the piston and the cylinder body; the oil filling hole is positioned on the piston; the piston is internally provided with a through hole, and the oil filling hole and the sealed oil cavity are communicated through the through hole; the middle taper sleeve is connected with the piston and the cylinder body, and the middle taper sleeve is matched with the piston and the cylinder body by conical surfaces. Under the condition that the expansion sleeve is sleeved on the shaft part, oil enters the oil filling hole in an oil filling mode and enters the sealed oil cavity, so that the piston and the cylinder body are evenly opened, after the piston and the cylinder body are opened, the jacking screw on the piston props against the end face of the cylinder body, oil filling is stopped, structural expansion can be achieved, the installation process is simple, the traditional expansion sleeve is connected, the bolt does not need to be repeatedly screwed, and the locking condition in the installation process of the expansion sleeve cannot be generated.
Description
Technical Field
The utility model relates to the technical field of expansion sleeves, in particular to a hydraulic expansion sleeve.
Background
The expansion sleeve structure is a connecting structure which is frequently adopted in the coupler, and the coupler is connected with the shaft of the unit in an interference mode.
The traditional expansion sleeve connecting structure adopts a plurality of bolts to be uniformly distributed on the same indexing circle, and the expansion sleeve is tensioned by pretightening force generated by tightening the bolts, so that interference holding force is generated between an inner hole of the expansion sleeve and a shaft of a unit, and torque is transmitted by friction force between shaft holes.
However, when the traditional expansion sleeve connecting structure is used, bolts are required to be uniformly screwed up step by step for step in a diagonal sequence in the installation process, the locking condition of the expansion sleeve is easily caused by improper operation, and the installation process is complex.
Disclosure of Invention
The utility model relates to a hydraulic expansion sleeve structure, which can uniformly expand an expansion sleeve in a hydraulic manner, does not generate locking condition in the installation process of the expansion sleeve and is convenient to install.
The device comprises a middle taper sleeve, a piston, a cylinder body and an oil filling hole;
the cylinder body and the piston are annular, and a sealed oil cavity is formed between the piston and the cylinder body;
the oil filling hole is positioned on the piston;
the piston is internally provided with a through hole, and the oil filling hole and the sealed oil cavity are communicated through the through hole;
the middle taper sleeve is connected with the piston and the cylinder body, and the middle taper sleeve is matched with the piston and the cylinder body by conical surfaces.
In one possible implementation manner, the middle taper sleeve is provided with at least two grooves, the end part of each groove is provided with a round hole, and a cylindrical pin is arranged in each round hole.
In one possible implementation, the number of slots is 4;
the grooves are uniformly distributed on the middle taper sleeve.
In one possible implementation, the hydraulic expansion sleeve structure further comprises at least four jacking screws;
the jack screw is embedded into the piston.
In one possible implementation, the piston is provided with a ring groove;
an O-shaped sealing ring and a check ring are arranged in the ring groove;
the O-shaped sealing ring is contacted with the check ring.
The technical scheme provided by the utility model has the beneficial effects that at least:
under the condition that the expansion sleeve is sleeved on the shaft part, oil enters the oil filling hole in an oil filling mode and enters the sealing oil cavity of the expansion sleeve, so that the piston and the cylinder body are uniformly opened, structural expansion is realized, the installation process is simple, and the condition that the expansion sleeve is locked in the installation process can not be generated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a cross-sectional view of a hydraulic expansion sleeve structure provided by the utility model.
Fig. 2 shows a schematic structural diagram of a hydraulic expansion sleeve structure provided by the utility model.
The labels in the figures are as follows:
1-middle taper sleeve, 2-piston, 3-cylinder, 4-oil filling hole, 5-oil cavity, 7-tightening screw, 8-O-shaped sealing ring, 9-retainer ring and 10-cylindrical pin;
21-ring groove;
61-round holes and 62-grooves;
101-axis.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the embodiments of the present utility model will be described in further detail with reference to the accompanying drawings.
Fig. 1 shows a cross-sectional view of a hydraulic expansion sleeve structure provided by the utility model. Fig. 2 shows a schematic structural diagram of a hydraulic expansion sleeve structure provided by the utility model. Referring to fig. 1 and 2, the hydraulic expansion sleeve structure is used for connecting with a shaft 101 in the actual use process, and the hydraulic expansion sleeve comprises a middle taper sleeve 1, a piston 2, a cylinder body 3 and an oil filling hole 4; the cylinder body 3 and the piston 2 are annular, and a sealed oil cavity 5 is formed between the piston 2 and the cylinder body 3. The oil filling hole 4 is positioned on the piston 2, a through hole is formed in the piston 2, and the oil filling hole 4 and the sealed oil cavity 5 are communicated through the through hole. The middle taper sleeve 1 is connected with the piston 2 and the cylinder body 3, and the middle taper sleeve 1 is matched with the piston 2 and the cylinder body 3 by conical surfaces.
Referring to fig. 1 and 2, in the embodiment of the present utility model, the portion abutting against the shaft 101 to be installed is the middle cone sleeve 1 of the device. Under the condition that hydraulic oil is not injected, the piston 2 and the cylinder body 3 are in an unexpanded state, when the hydraulic oil is injected, the hydraulic oil is injected between the piston 2 and the cylinder body 3, the piston 2 and the cylinder body 3 are pushed to axially expand, and the piston and the cylinder body axially move along the conical surface of the conical sleeve 1, so that the conical surface of the conical sleeve 1 is compressed, surface positive pressure is generated, and the hydraulic expansion sleeve is in a compressed state.
In summary, in the device provided by the embodiment of the utility model, under the condition that the expansion sleeve is sleeved on the shaft part, oil enters the oil injection hole and enters the sealing oil cavity of the expansion sleeve in an oil injection mode, so that the piston and the cylinder body are uniformly opened, the piston and the cylinder body slide along the surface of the taper sleeve, the structural expansion is realized, the installation process is simple, and the locking condition in the installation process of the expansion sleeve can not be generated.
In one possible implementation manner, the middle taper sleeve 1 is provided with at least two grooves 62, the end part of each groove 62 is provided with a round hole 61, the round hole is internally provided with a positioning pin 10, when the positioning pin is not installed, the slotted side of the taper sleeve 1 is small in size, the piston 2 and the cylinder body 3 can conveniently pass through the slotted side of the taper sleeve 1, after the piston 2 and the cylinder body 3 are installed on the taper sleeve 1, the positioning pin 10 is installed from the inner hole of the taper sleeve 1, the opening part can be restored, and the whole hydraulic expansion sleeve is conveniently installed on the shaft 101 in the later period. In this case, the number of grooves 62 is 4, and the grooves 62 are uniformly distributed on the intermediate cone sleeve 1. That is, the two grooves 62 are spaced apart by 90 degrees.
In one possible implementation, the hydraulic expansion sleeve structure further comprises at least four jacking screws 7, the jacking screws 7 being embedded in the piston 2. The jacking screw 7 is used when the hydraulic expansion sleeve is in an expansion state during installation, and after the hydraulic expansion sleeve is installed and expanded, the jacking screw 7 is screwed until the hydraulic expansion sleeve contacts with the cylinder body 3, so that the relative positions of the piston 2 and the cylinder body 3 can be fixed.
In one possible implementation, the piston 2 is provided with a ring groove having an O-ring 8 and a retainer 9,O in contact with the retainer 9 for use as a sealing assembly.
The foregoing description of the preferred embodiments of the present utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements within the spirit and principles of the present utility model.
Claims (5)
1. The hydraulic expansion sleeve structure is characterized by comprising a middle taper sleeve (1), a piston (2), a cylinder body (3) and an oil filling hole (4);
the cylinder body (3) and the piston (2) are annular, and a sealed oil cavity (5) is formed between the piston (2) and the cylinder body (3);
the oil filling hole (4) is positioned on the piston (2);
the piston (2) is provided with a through hole, and the oil filling hole (4) and the sealed oil cavity (5) are communicated through the through hole;
the middle taper sleeve (1) is annular, the middle taper sleeve (1) is connected with the piston (2) and the cylinder body (3), and the middle taper sleeve (1) is matched with the piston (2) and the cylinder body (3) through conical surfaces.
2. The hydraulic expansion sleeve structure according to claim 1, wherein the middle taper sleeve (1) is provided with at least 2 grooves (62), the end part of each groove (62) is provided with a round hole (61), and a cylindrical pin (10) is arranged in each round hole (61).
3. The hydraulic expansion sleeve structure according to claim 2, characterized in that the number of slots (62) is 4;
the grooves (62) are uniformly distributed on the middle taper sleeve (1).
4. The hydraulic expansion sleeve structure according to claim 1, characterized in that it further comprises at least four jacking screws (7);
the jacking screw (7) is embedded into the piston (2).
5. The hydraulic expansion sleeve structure according to claim 1, characterized in that the piston (2) is provided with a ring groove (21);
an O-shaped sealing ring (8) and a check ring (9) are arranged in the annular groove (21);
the O-shaped sealing ring (8) is in contact with the check ring (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321267059.8U CN219932773U (en) | 2023-05-24 | 2023-05-24 | Hydraulic expansion sleeve structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321267059.8U CN219932773U (en) | 2023-05-24 | 2023-05-24 | Hydraulic expansion sleeve structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219932773U true CN219932773U (en) | 2023-10-31 |
Family
ID=88493689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321267059.8U Active CN219932773U (en) | 2023-05-24 | 2023-05-24 | Hydraulic expansion sleeve structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219932773U (en) |
-
2023
- 2023-05-24 CN CN202321267059.8U patent/CN219932773U/en active Active
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| GR01 | Patent grant |