CN222818376U - Internal expansion type fixing device for milling top surface of end cover - Google Patents
Internal expansion type fixing device for milling top surface of end cover Download PDFInfo
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- CN222818376U CN222818376U CN202421590812.1U CN202421590812U CN222818376U CN 222818376 U CN222818376 U CN 222818376U CN 202421590812 U CN202421590812 U CN 202421590812U CN 222818376 U CN222818376 U CN 222818376U
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- radial
- end cover
- limiting
- fixing device
- milling
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Abstract
The utility model provides an internal expansion type fixing device for milling the top surface of an end cap, comprising a bottom plate, a support cylinder, and an internal expansion component. The lower end of the support cylinder is connected to the bottom plate, and its upper end extends vertically upward for coaxially fitting the end cap. The inner diameter of the support cylinder is smaller than the diameter of the central hole on the end cap; The internal expansion component includes an axial top rod that can move up and down in the inner cavity, a radial hole that is opened at the upper end of the support cylinder and extends radially, and a radial top rod that can move inside and outside and pass through the radial hole. The upper end of the axial top rod is a conical part with a small top and a large bottom, and the lower end is spaced apart from the bottom plate. The radial hole is connected to the inner cavity and passes through the outer wall of the support cylinder. There are at least three radial holes evenly distributed around the axis of the support cylinder. The length of the radial top rod is greater than that of the radial hole, and its inner end is in contact with the outer wall of the conical part. When the axial top rod moves upward, it can push the radial top rod outward through the outer wall of the conical part, thereby pressing against the end cap. Inner wall, achieving internal expansion fixation.
Description
Technical Field
The utility model belongs to the technical field of fixing jigs, and particularly relates to an internal expansion type fixing device for milling a top surface of an end cover.
Background
The end cover is a common mechanical part and is usually stamped by a thin plate, the diameter of the existing end cover (a mobile phone camera protective cover) is about 13mm, the height of the end cover is 3mm, the wall thickness of the end cover is 0.15mm, the top of the end cover is annular and is provided with a center hole, the top surface of the end cover is required to be finish-milled after stamping forming to meet the design size due to the fact that the thickness tolerance of a stamping raw material plate is large, the end cover is limited by technological requirements, and the outer wall of the end cover is not contacted after stamping forming, so that the end cover is fixed for milling.
Disclosure of utility model
The utility model aims to overcome one or more defects in the prior art and provides an internal expansion type fixing device for milling the top surface of an end cover.
In order to achieve the above purpose, the technical scheme adopted by the utility model is that the internal expansion type fixing device for milling the top surface of the end cover comprises:
A bottom plate;
The lower end part of the supporting cylinder is connected to the bottom plate, the upper end part of the supporting cylinder extends upwards vertically and is used for coaxially sleeving an end cover, and the diameter of the inner cavity of the supporting cylinder is smaller than the inner diameter of the central hole on the end cover;
The inner expansion assembly comprises an axial ejector rod, radial holes and radial ejector rods, the axial ejector rods are arranged in the inner cavity in a vertically movable mode, the upper end portions of the axial ejector rods are tapered parts with small upper portions and large lower portions, the lower end portions of the axial ejector rods are spaced from the bottom plate, the radial holes Kong Kaishe are formed in the upper end portions of the supporting cylinders and extend along the radial direction of the supporting cylinders, the radial holes penetrate through the inner cavity and penetrate through the outer wall surface of the supporting cylinders, at least three radial holes are uniformly distributed around the axial lead of the supporting cylinders, the radial ejector rods penetrate through the radial holes in an inner and outer movable mode, the length of the radial ejector rods is larger than that of the radial holes, and the inner end portions of the radial ejector rods are abutted against the outer wall surface of the tapered parts.
Preferably, an elastic member is disposed between the lower end portion of the axial ejector rod and the bottom plate, and the elastic member has a tendency to drive the axial ejector rod to move upwards.
Further preferably, the lower end face of the axial ejector rod is provided with an upwardly extending blind hole for accommodating the upper end portion of the elastic member.
Preferably, the inner end part of the radial ejector rod is in facial line contact with the outer wall of the headless conical part, the inner end surface of the radial ejector rod is a slope extending downwards and outwards in an inclined mode, and the inclination of the slope is matched with the taper of the headless conical part.
Further preferably, the inner end of the radial ejector rod is in contact with the outer wall surface of the headless conical part, and the middle part of the inclined plane is concave to form an inner concave surface matched with the outer wall surface of the headless conical part.
Preferably, the outer end of the radial ejector rod is in a ball head shape.
Preferably, the inner expansion type fixing device for milling the top surface of the end cover further comprises a limiting component used for limiting the inner and outer movement limit positions of the radial ejector rod, the limiting component comprises a limiting hole, a limiting groove and a limiting pin, the limiting part Kong Kaishe is arranged on the upper end surface of the supporting cylinder, the limiting hole corresponds to the radial hole and is vertically communicated with the radial hole, the limiting groove is formed in the radial ejector rod and is located below the limiting hole, the groove width of the limiting groove in the radial direction of the supporting cylinder is larger than the inner diameter of the limiting hole, and the limiting pin is embedded in the limiting hole and stretches into the limiting groove.
Further preferably, the upper end surface of the limit pin is not higher than the upper end surface of the support cylinder.
Further preferably, the limiting hole is located inside the central hole on the cover plate.
Preferably, the number of the radial holes is four, and the cross section of the radial holes is circular.
Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
the utility model provides an internal expansion type fixing device for milling the top surface of an end cover, which comprises a bottom plate, a supporting cylinder and an internal expansion component, wherein the lower end part of the supporting cylinder is connected to the bottom plate, the upper end part of the supporting cylinder vertically extends upwards to coaxially sleeve the end cover, the diameter of an inner cavity of the supporting cylinder is smaller than that of a central hole on the end cover, the internal expansion component comprises an axial ejector rod which can be arranged in the inner cavity in a vertical moving way, a radial hole which is arranged at the upper end part of the supporting cylinder and radially extends, and a radial ejector rod which can be arranged in the radial hole in a penetrating way in an internal and external moving way, the upper end part of the axial ejector rod is a tapered part with a small upper part and a big lower part, the lower end part of the axial ejector rod is spaced from the bottom plate, the radial hole is communicated with the inner cavity and penetrates through the outer wall surface of the supporting cylinder, at least three radial holes are uniformly distributed around the axial line of the supporting cylinder, the length of the radial ejector rod is longer than that of the radial hole, the inner end part of the radial ejector rod is propped against the outer wall of the tapered part, and when the axial ejector rod moves upwards, the outer wall of the tapered part can be pushed outwards through the outer wall of the tapered part, so as to prop up the inner wall of the tapered part when the tapered part moves upwards.
Drawings
Fig. 1 and 2 are schematic perspective views of an end cap according to the present utility model.
Fig. 3 is a schematic perspective view of a preferred embodiment of the present utility model.
Fig. 4 is a schematic perspective view of fig. 3 with the end cap removed.
Fig. 5 is a schematic perspective view of the support cylinder of fig. 4 with the support cylinder removed.
Fig. 6 is a schematic top view of fig. 3.
FIG. 7 is a schematic cross-sectional view taken along the direction A-A in FIG. 6, with view angles adjusted for ease of viewing.
The novel anti-theft lock comprises a cover 1, a central hole 2, a top surface 3, a bottom plate 10, a supporting cylinder 20, a cavity 21, a 30, an inner expansion component 31, an axial ejector rod 311, a conical part with a head removed 312, a blind hole 32, a radial hole 33, a radial ejector rod 331, an inclined surface 40, an elastic piece 50, a limiting component 51, a limiting hole 52, a limiting groove 53 and a limiting pin.
Detailed Description
The utility model provides an inner expansion type fixing device for milling a top surface of an end cover, which comprises a bottom plate 10, a supporting cylinder 20 and an inner expansion assembly 30, wherein the bottom plate 10 extends along the horizontal direction, the lower end part of the supporting cylinder 20 is connected to the bottom plate 10, the upper end part of the supporting cylinder 20 extends upwards and vertically and is used for coaxially sleeving the end cover 1, the diameter of an inner cavity 21 of the supporting cylinder 20 is smaller than the inner diameter of a central hole 2 on the end cover 1, the inner expansion assembly 30 comprises an axial ejector rod 31, a radial hole 32 and a radial ejector rod 33, the axial ejector rod 31 is arranged in the inner cavity 21 in a vertically movable manner, the upper end part of the axial ejector rod 31 is a conical part 311 with a small upper part and a large lower part, the lower end part of the axial ejector rod 31 is spaced from the bottom plate 10, the radial hole 32 is arranged at the upper end part of the supporting cylinder 20 and extends along the radial direction of the supporting cylinder 20, the radial hole 32 is communicated with the inner cavity 21 of the supporting cylinder 20 and penetrates through the outer wall surface of the supporting cylinder 20, the radial hole 32 is four and surrounds the axis line of the supporting cylinder 20, the radial hole 32 is circular, the radial ejector rod 33 is arranged in a circular shape, the radial ejector rod 33 can move inwards and outwards, the radial ejector rod 33 is arranged in the radial hole 32, the radial inner part is larger than the radial end part of the initial end part of the radial ejector rod 33 is not uniformly distributed on the radial inner end part of the conical part of the supporting rod 32, and the radial end part 311 when the radial end part is not in the radial end part of the axial ejector rod 32 is not uniformly distributed.
The advantage of this arrangement is that when the axial ejector rod 31 moves upwards, the radial ejector rod 33 can be pushed outwards through the outer wall surface of the headless conical part 311, so that the outer end part of the radial ejector rod 33 abuts against the inner wall of the end cover 1, the inner expansion type fixation is realized, and the finish milling of the top surface 3 of the end cover 1 is facilitated.
In this embodiment, an elastic member 40 is disposed between the lower end portion of the axial push rod 31 and the bottom plate 10, the elastic member 40 has a tendency to drive the axial push rod 31 to move upward, and the elastic member 40 is a spring.
To improve stability, further, the lower end surface of the axial push rod 31 is provided with an upwardly extending blind hole 312, and the blind hole 312 is used for accommodating the upper end portion of the elastic member 40.
In order to improve the pushing stability, in this embodiment, the contact between the inner end of the radial ejector 33 and the outer wall surface of the headless conical portion 311 is preferably a line contact, specifically, the inner end of the radial ejector 33 is a slope 331 extending obliquely downward and outward, and the slope of the slope 331 matches the taper of the headless conical portion 311.
In another embodiment, to further improve the pushing stability, the inner end of the radial ejector 33 contacts with the outer wall surface of the truncated conical portion 311, specifically, on the basis of this embodiment, the middle of the inclined surface 331 is concave to form an inner concave surface matching with the outer wall surface of the truncated conical portion 311.
In this embodiment, the outer end of the radial jack 33 is shaped like a ball so as to reduce the contact surface with the inner wall surface of the end cap 1 when the inner expansion is fixed.
In this embodiment, the internal expansion fixing device for milling the top surface of the end cover further includes a limiting component 50 for limiting the internal and external movement limit position of the radial ejector rod 33, the limiting component 50 includes a limiting hole 51, a limiting groove 52 and a limiting pin 53, the limiting hole 51 is formed on the upper end surface of the support cylinder 20 and extends downwards, the limiting hole 51 corresponds to the radial hole 32 and vertically penetrates through the radial ejector rod 33, the limiting groove 52 is formed on the radial ejector rod 33 and is located below the limiting hole 51, the groove width of the limiting groove 52 in the radial direction of the support cylinder 20 is larger than the inner diameter of the limiting hole 51, and the limiting pin 53 is embedded in the limiting hole 51 and extends into the limiting groove 52.
In order to avoid interference, the upper end surface of the limiting pin 53 is flush with the upper end surface of the supporting cylinder 20, and at the same time, the limiting hole 52 is located inside the central hole 2 on the cover plate 1.
The above embodiments are provided to illustrate the technical concept and features of the present utility model and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.
Claims (10)
1. An internal expansion type fixing device for milling a top surface of an end cover, which is characterized by comprising the following components:
A bottom plate;
The lower end part of the supporting cylinder is connected to the bottom plate, the upper end part of the supporting cylinder extends upwards vertically and is used for coaxially sleeving an end cover, and the diameter of the inner cavity of the supporting cylinder is smaller than the inner diameter of the central hole on the end cover;
The inner expansion assembly comprises an axial ejector rod, radial holes and radial ejector rods, the axial ejector rods are arranged in the inner cavity in a vertically movable mode, the upper end portions of the axial ejector rods are tapered parts with small upper portions and large lower portions, the lower end portions of the axial ejector rods are spaced from the bottom plate, the radial holes Kong Kaishe are formed in the upper end portions of the supporting cylinders and extend along the radial direction of the supporting cylinders, the radial holes penetrate through the inner cavity and penetrate through the outer wall surface of the supporting cylinders, at least three radial holes are uniformly distributed around the axial lead of the supporting cylinders, the radial ejector rods penetrate through the radial holes in an inner and outer movable mode, the length of the radial ejector rods is larger than that of the radial holes, and the inner end portions of the radial ejector rods are abutted against the outer wall surface of the tapered parts.
2. The internal expanding type fixing device for milling the top surface of the end cover of claim 1, wherein an elastic piece is arranged between the lower end part of the axial ejector rod and the bottom plate, and the elastic piece has a trend of driving the axial ejector rod to move upwards.
3. The internal expanding type fixing device for milling the top surface of the end cover according to claim 2, wherein the lower end surface of the axial ejector rod is provided with a blind hole extending upwards, and the blind hole is used for accommodating the upper end part of the elastic piece.
4. The internal expanding type fixing device for milling the top surface of the end cover of claim 1, wherein the inner end part of the radial ejector rod is in line contact with the outer wall surface of the conical part of the head, the inner end surface of the radial ejector rod is an inclined surface which extends downwards and outwards in an inclined manner, and the inclination of the inclined surface is matched with the taper of the conical part of the head.
5. The internal expanding type fixing device for milling the top surface of the end cover of claim 4, wherein the inner end part of the radial ejector rod is contacted with the outer wall surface of the conical part of the deheader, and the middle part of the inclined surface is concave to form an inner concave surface matched with the outer wall surface of the conical part of the deheader.
6. The internal expanding type fixing device for milling the top surface of the end cover of claim 1, wherein the outer end part of the radial ejector rod is in a ball head shape.
7. The internal expanding type fixing device for milling the top surface of the end cover according to claim 1, wherein the internal expanding type fixing device for milling the top surface of the end cover further comprises a limiting component used for limiting the internal and external movement limit position of the radial ejector rod, the limiting component comprises a limiting hole, a limiting groove and a limiting pin, the limiting Kong Kaishe is arranged on the upper end surface of the supporting cylinder, the limiting hole corresponds to the radial hole and is vertically communicated with the radial hole, the limiting groove is formed in the radial ejector rod and is located below the limiting hole, the groove width of the limiting groove in the radial direction of the supporting cylinder is larger than the inner diameter of the limiting hole, and the limiting pin is embedded in the limiting hole and extends into the limiting groove.
8. The internal expanding type fixing device for milling the top surface of the end cover of claim 7, wherein the upper end surface of the limiting pin is not higher than the upper end surface of the supporting cylinder.
9. The internal expanding type fixing device for milling the top surface of the end cover according to claim 7, wherein the limiting hole is positioned on the inner side of the central hole of the end cover.
10. The internal expanding type fixing device for milling the top surface of the end cover according to claim 1, wherein the number of the radial holes is four, and the cross section of the radial holes is circular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421590812.1U CN222818376U (en) | 2024-07-08 | 2024-07-08 | Internal expansion type fixing device for milling top surface of end cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421590812.1U CN222818376U (en) | 2024-07-08 | 2024-07-08 | Internal expansion type fixing device for milling top surface of end cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222818376U true CN222818376U (en) | 2025-05-02 |
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ID=95491540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421590812.1U Active CN222818376U (en) | 2024-07-08 | 2024-07-08 | Internal expansion type fixing device for milling top surface of end cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222818376U (en) |
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- 2024-07-08 CN CN202421590812.1U patent/CN222818376U/en active Active
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