CN214465667U - Expansion sleeve device for shaft hole - Google Patents
Expansion sleeve device for shaft hole Download PDFInfo
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- CN214465667U CN214465667U CN202120258185.1U CN202120258185U CN214465667U CN 214465667 U CN214465667 U CN 214465667U CN 202120258185 U CN202120258185 U CN 202120258185U CN 214465667 U CN214465667 U CN 214465667U
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- expansion
- hole
- shaft
- block
- sleeve
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Abstract
The utility model discloses an expansion sleeve device for a shaft hole, which comprises an expansion outer sleeve and an expansion assembly; blind holes are respectively arranged at two ends of the expansion outer sleeve, and the pair of blind holes are connected through a through hole with the diameter smaller than that of the blind holes; the two ends of the expansion jacket are respectively provided with a strip groove group arranged along the axis of the expansion jacket, each strip groove group comprises a plurality of strip grooves with openings at the end sides and uniformly arranged on the circumference, and the depth direction of each strip groove is communicated with the blind hole; the expansion assembly comprises an expansion block, a support shaft and a locking nut; one end of the supporting shaft is connected with the through hole, the other end of the supporting shaft is located on the outer side of the expansion outer sleeve, a locking nut is installed on the outer side of the expansion outer sleeve in a threaded mode, the expansion block is sleeved on the supporting shaft in a left-right moving mode, one end of the expansion block is located in the blind hole, the diameter of the other end of the expansion block is larger than the diameter of the blind hole, the expansion block moves in an extruding mode through the locking nut, and the expansion block is smoothly transited between the two ends of the expansion block. This axle hole is with expanding set device, simple structure not only realizes tightly fixing to the quick bloating in axle hole, and the convenience is dismantled its convenience moreover fast, facilitates the use.
Description
Technical Field
The utility model relates to a machinery installation field, concretely relates to axle hole is with bloated cover device.
Background
In the traditional mechanical production process, the shaft hole needs to be positioned to ensure the assembly precision, such as coaxiality, and the traditional shaft hole positioning mode mainly comprises clearance fit, excessive fit and interference fit;
clearance fit causes the wearing and tearing in axle and hole very easily, and excessive fit application scope is narrow, and the interference fit dismouting is inconvenient, consequently will adopt the tight mode of expanding to fix a position, and some tight devices that expand can realize tightly fixing expanding fast in shaft hole, but its dismantlement is more difficult, needs the instrument of special matching, can't realize dismantling fast, causes the loaded down with trivial details of dismantling, the wasted time.
Disclosure of Invention
The utility model provides a shaft hole is with cover device that expands, simple structure not only realizes tightly fixing to the quick inflation in shaft hole, and the convenience is dismantled its convenience moreover fast, facilitates the use.
In order to achieve the purpose, the expansion sleeve device for the shaft hole comprises an expansion outer sleeve and an expansion assembly;
the axis of the expansion outer sleeve is arranged on the left and right sides, blind holes are respectively arranged at two ends of the expansion outer sleeve, and the pair of blind holes are connected through a through hole with the diameter smaller than that of the blind holes;
the two ends of the expansion jacket are respectively provided with a strip groove group arranged along the axis of the expansion jacket, each strip groove group comprises a plurality of strip grooves with openings at the end sides and uniformly arranged on the circumference, and the depth direction of each strip groove is communicated with the blind hole;
the pair of expansion assemblies is correspondingly arranged on two sides of the expansion sleeve, and each group of expansion assemblies comprises an expansion block, a support shaft and a locking nut;
one end of the supporting shaft is connected with the through hole, the other end of the supporting shaft is located on the outer side of the expansion outer sleeve, a locking nut is installed on the outer side of the expansion outer sleeve in a threaded mode, the expansion block is sleeved on the supporting shaft in a left-right moving mode, one end of the expansion block is located in the blind hole, the diameter of the other end of the expansion block is larger than the diameter of the blind hole, the expansion block moves in an extruding mode through the locking nut, and smooth transition is achieved between the two ends of the expansion block.
Furthermore, the supporting shaft is sleeved with a spring, the spring is positioned in the blind hole, one end of the spring is in contact with the end face of the expansion block, and the other end of the spring is in contact with the inner wall of the blind hole.
The pair of disassembling assemblies is arranged corresponding to the pair of expansion assemblies, each group of disassembling assemblies comprises a limiting block, the limiting blocks are arranged on the supporting shaft in a threaded mode and located in the blind holes, and the expansion blocks are located between the locking nuts and the limiting blocks;
one end of the supporting shaft is connected with the through hole.
The expansion block is provided with a threaded hole which penetrates through the expansion block left and right, and the expansion block is sleeved on the support shaft through the threaded hole which moves left and right;
the thread of the ejection shaft is propped against the inner wall of the blind hole after penetrating through the threaded hole of the expansion block.
Furthermore, the expansion block is of a circular truncated cone structure, and an included angle between a generatrix of the circular truncated cone and the axis of the circular truncated cone is 2-5 degrees.
Furthermore, each strip-shaped groove group comprises four groups of strip-shaped grooves, and the left and right lengths of the strip-shaped grooves account for one fourth to one third of the total length of the expansion jacket.
Furthermore, the blind hole is matched with the outer wall of the expansion block.
Compared with the prior art, the expansion sleeve device for the shaft hole is provided with the expansion assembly, the locking nut is in threaded connection with the support shaft, one end of the expansion outer sleeve is positioned in the blind hole, when the locking nut is rotated, the expansion block is extruded and moved, the outer side of the expansion block extrudes the inner wall of the blind hole of the expansion outer sleeve, and the expansion block is tightly contacted with the shaft hole through the increase of the outer diameter of the expansion outer sleeve, so that the expansion fixation of two ends of the shaft hole is realized, the rigid fixation purpose is achieved, the uniform expansion of the circumference is realized, the coaxiality of the expansion block is guaranteed, and the assembly precision of the expansion block is higher;
the support shafts are provided with the limiting blocks, when the support shafts are disassembled, the support shafts are rotated to drive the limiting blocks on the support shafts to move outwards, so that the limiting blocks extrude the expansion blocks outwards, and the expansion blocks are quickly separated from contact with the blind holes, so that the rapid disassembly is realized;
because the spring is arranged in the blind hole, when the expansion block moves and expands the blind hole, the spring can be used for reversely jacking, so that the expansion block is contacted more tightly on one hand, and when the locking nut moves reversely on the other hand, the expansion block can be conveniently withdrawn by the reaction force of the spring on the expansion block; this axle hole is with expanding set device, simple structure not only realizes tightly fixing to the quick bloating in axle hole, and the convenience is dismantled its convenience moreover fast, facilitates the use.
Drawings
FIG. 1 is a schematic view of the present invention in its entirety;
FIG. 2 is an overall front view of the present invention;
FIG. 3 is a front view of the overall first mode of disassembly of the present invention;
FIG. 4 is a front view of the overall second mode of detachment of the present invention;
in the figure: 1. the device comprises an expansion outer sleeve, 11, a strip-shaped groove, 12, a blind hole, 13, a through hole, 2, an expansion block, 3, a locking nut, 4, a support shaft, 41, a limiting block, 5, an ejection shaft, 6 and a spring.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1 and 2, the sleeve expanding device for the shaft hole comprises an expanding outer sleeve 1 and an expanding assembly;
the axis of the expansion outer sleeve 1 is arranged on the left and right, blind holes 12 are respectively arranged at two ends of the expansion outer sleeve, and the pair of blind holes 12 are connected through a through hole 13 with the diameter smaller than that of the blind holes 12;
two ends of the expansion jacket 1 are respectively provided with strip-shaped groove groups which are arranged along the axis of the expansion jacket, each strip-shaped groove group comprises a plurality of strip-shaped grooves 11 with openings at the end sides and uniformly arranged on the circumference, and the depth direction of each strip-shaped groove 11 is communicated with the blind hole 12;
the pair of expansion assemblies is correspondingly arranged on two sides of the expansion sleeve 1, and each group of expansion assemblies comprises an expansion block 2, a support shaft 4 and a locking nut 3;
one end of the supporting shaft 4 is connected with the through hole 13, the other end of the supporting shaft is located on the outer side of the expansion outer sleeve 1, the locking nut 3 is installed in a threaded mode, the expansion block 2 is sleeved on the supporting shaft 4 in a left-and-right mode, one end of the supporting shaft is located in the blind hole 12, the diameter of the other end of the supporting shaft is larger than the diameter of the blind hole 12, the supporting shaft is extruded and moved through the locking nut 3, and the two ends of the expansion block 2 are in smooth transition.
Further, the supporting shaft 4 is sleeved with a spring 6, the spring 6 is positioned in the blind hole 12, one end of the spring is contacted with the end face of the expansion block 2, and the other end of the spring is contacted with the inner wall of the blind hole 12;
as shown in fig. 3, further, the device further comprises a pair of disassembling assemblies, each pair of disassembling assemblies is arranged corresponding to a pair of tightening assemblies, each group of disassembling assemblies comprises a limiting block 41, the limiting blocks 41 are mounted on the supporting shaft 4 in a threaded manner and are located in the blind holes 12, and the tightening blocks 2 are located between the locking nuts 3 and the limiting blocks 41;
one end of the supporting shaft 4 is connected with the through hole 13.
As shown in fig. 4, further, the device further comprises a jacking shaft 5, wherein the expansion block 2 is provided with a threaded hole which penetrates through the left and right sides and is sleeved on the supporting shaft 4 through the threaded hole which moves left and right;
the ejection shaft 5 is pressed against the inner wall of the blind hole 12 after the thread of the ejection shaft passes through the threaded hole of the expansion block 2;
furthermore, the expansion block 2 is in a circular truncated cone structure, and an included angle between a generatrix of the circular truncated cone and the axis of the circular truncated cone is 2-5 degrees. Preferably 3 °;
further, the blind hole 12 is matched with the outer wall of the expansion block 2; namely, when the expansion block 2 is a circular truncated cone block, the corresponding blind holes 12 are also circular truncated cone-shaped frames and are matched with each other.
Further, each set of strip-shaped grooves comprises four sets of strip-shaped grooves 11, and the left and right lengths of the strip-shaped grooves 11 account for one fourth to one third of the total length of the expansion jacket 1.
When the expansion sleeve device for the shaft hole is used, firstly, an expansion outer sleeve 1 is sleeved in a shaft hole needing expansion positioning, a pair of support shafts 4 are in threaded connection with through holes 13 in the middle of the expansion outer sleeve 1, and an expansion block 2 and a locking nut 3 are arranged on the corresponding support shafts 4;
because the locking nut 3 is in threaded connection with the supporting shaft 4, one end of the expansion outer sleeve 1 is positioned in the blind hole 12, when the locking nut 3 is rotated, the locking nut 3 extrudes and moves the expansion block 2 to enable the expansion block to move towards the blind hole 12, the diameter of one end of the expansion block 2 is larger than that of the blind hole 12, and two ends of the expansion block are in smooth transition, so that the outer side of the expansion block 2 extrudes the inner wall of the blind hole 12 of the expansion outer sleeve 1, the expansion block is buffered through the strip-shaped groove 11, namely the outer diameter of the expansion outer sleeve 1 is increased to be in tight contact with a shaft hole, and the pair of expansion blocks 2 are extruded towards the middle part of the expansion outer sleeve 1, so that expansion and fixation of two ends of the shaft hole are realized, the purpose of rigid fixation is achieved, and because the expansion outer sleeve 1 is of a cylindrical structure, the plurality of strip-shaped grooves 11 are uniformly arranged on the circumference, uniform expansion of the circumference is realized, the coaxiality of the expansion outer sleeve is ensured, and the assembly precision of the expansion sleeve is higher;
because the spring 6 is arranged in the blind hole 12, one end of the spring 6 is contacted with the end surface of the expansion block 2, and the other end of the spring 6 is contacted with the inner wall of the blind hole 12, when the expansion block 2 moves and expands the blind hole 12, the spring 6 can be used for reversely jacking, on one hand, the contact is tighter, on the other hand, the disassembly is convenient, namely, when the locking nut 3 is reversely moved, the spring 6 can be used for reacting force on the expansion block 2, and the expansion block 2 can be conveniently withdrawn;
when the device is disassembled, the locking nut 3 is rotated reversely, the expansion sleeve 1 rebounds to the initial size, the whole device can be taken out of the shaft hole, when the expansion force of the expansion block 2 is too large, the expansion sleeve 1 cannot rebound to the initial size quickly due to the effect of friction force, therefore, as a scheme, each support shaft 4 is provided with a limit block 41, the support shafts 4 are in threaded connection with the through holes 13, when the device is disassembled, the support shafts 4 are rotated to drive the limit blocks 41 on the support shafts to move outwards, namely, the limit blocks 41 extrude the expansion block 2 outwards, so that the expansion block 2 is quickly separated from being in contact with the blind holes 12, the quick disassembly is realized, and in addition, the limit blocks 41 can be installed on the support shafts 4 in a threaded manner, so that the positions of the limit blocks 41 can be adjusted, and the adjustment is convenient according to practical use;
as another scheme, the ejection shaft 5 is connected with the threaded hole penetrating through the expansion block 2 in a threaded manner and then abuts against the inner wall of the blind hole 12, when the blind hole is disassembled, the ejection shaft 5 and the expansion block 2 are installed in a threaded manner, the ejection shaft 5 is rotated to enable one end of the ejection shaft to be in contact with the inner wall of the blind hole 12 and abut against the inner wall, the expansion block 2 moves outwards and is separated from the blind hole 2 to be in contact with the blind hole 2, and therefore rapid disassembly is achieved;
this axle hole is with expanding set device, simple structure not only can realize expanding tightly fixedly fast in axle hole, and the convenience is dismantled it fast moreover.
Claims (7)
1. The expansion sleeve device for the shaft hole comprises an expansion outer sleeve (1) and an expansion assembly;
the axis of the expansion outer sleeve (1) is arranged left and right, and is characterized in that,
blind holes (12) are respectively arranged at two ends of the expansion outer sleeve (1), and the pair of blind holes (12) are connected through a through hole (13) with the diameter smaller than that of the blind holes (12);
strip-shaped groove groups which are arranged along the axis of the expansion jacket (1) are respectively arranged at the two ends of the expansion jacket, each strip-shaped groove group comprises a plurality of strip-shaped grooves (11) which are opened at the end sides and are uniformly arranged on the circumference, and the depth direction of each strip-shaped groove (11) is communicated with the blind hole (12);
the pair of expansion assemblies is correspondingly arranged on two sides of the expansion sleeve (1), and each group of expansion assemblies comprises an expansion block (2), a support shaft (4) and a locking nut (3);
one end of the supporting shaft (4) is connected with the through hole (13), the other end of the supporting shaft is located on the outer side of the expansion outer sleeve (1), the locking nut (3) is installed in a threaded mode, the expansion block (2) is sleeved on the supporting shaft (4) in a left-and-right moving mode, one end of the expansion block is located in the blind hole (12), the diameter of the other end of the expansion block is larger than the diameter of the blind hole (12), the expansion block is extruded and moved through the locking nut (3), and smooth transition is achieved between the two ends of the expansion block (2).
2. The sleeve expanding device for the shaft hole is characterized in that the supporting shaft (4) is sleeved with the spring (6), the spring (6) is positioned in the blind hole (12), one end of the spring is in contact with the end face of the expansion block (2), and the other end of the spring is in contact with the inner wall of the blind hole (12).
3. The sleeve expanding device for the shaft hole according to claim 1, further comprising a pair of disassembling assemblies, wherein the disassembling assemblies are arranged corresponding to the pair of expanding assemblies, each group of disassembling assemblies comprises a limiting block (41), the limiting blocks (41) are installed on the supporting shaft (4) in a threaded manner and are positioned in the blind holes (12), and the expanding block (2) is positioned between the locking nut (3) and the limiting blocks (41);
one end of the supporting shaft (4) is connected with the through hole (13).
4. The sleeve expanding device for the shaft hole according to claim 1, further comprising a jacking shaft (5), wherein the expansion block (2) is provided with a threaded hole which penetrates through the shaft hole from left to right and is sleeved on the supporting shaft (4) through the threaded hole from left to right;
the screw thread of the ejecting shaft (5) is pushed against the inner wall of the blind hole (12) after passing through the threaded hole of the expansion block (2).
5. The sleeve expanding device for the shaft hole according to claim 3 or 4, wherein the expanding block (2) is of a circular truncated cone structure, and an included angle between a generatrix of the circular truncated cone and an axis of the circular truncated cone is 2-5 degrees.
6. The sleeve expansion device for shaft hole according to claim 5, wherein each set of strip-shaped grooves comprises four sets of strip-shaped grooves (11), and the left and right lengths of the strip-shaped grooves (11) account for one fourth to one third of the total length of the expansion sleeve (1).
7. The sleeve expanding device for the shaft hole according to claim 6, wherein the blind hole (12) is matched with the outer wall of the expansion block (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120258185.1U CN214465667U (en) | 2021-01-29 | 2021-01-29 | Expansion sleeve device for shaft hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120258185.1U CN214465667U (en) | 2021-01-29 | 2021-01-29 | Expansion sleeve device for shaft hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214465667U true CN214465667U (en) | 2021-10-22 |
Family
ID=78116868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120258185.1U Active CN214465667U (en) | 2021-01-29 | 2021-01-29 | Expansion sleeve device for shaft hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214465667U (en) |
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2021
- 2021-01-29 CN CN202120258185.1U patent/CN214465667U/en active Active
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