CN210757340U - Combined inner hole positioner - Google Patents
Combined inner hole positioner Download PDFInfo
- Publication number
- CN210757340U CN210757340U CN201921729593.XU CN201921729593U CN210757340U CN 210757340 U CN210757340 U CN 210757340U CN 201921729593 U CN201921729593 U CN 201921729593U CN 210757340 U CN210757340 U CN 210757340U
- Authority
- CN
- China
- Prior art keywords
- movable
- sleeve
- fixed sleeve
- guide hole
- hole
- Prior art date
- 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.)
- Expired - Fee Related
Links
- 238000003825 pressing Methods 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The utility model relates to the technical field of tool fixtures, in particular to a combined inner hole positioner, which comprises a fixed sleeve, a movable sleeve, three movable balls, a spring, a pressing plate and a jacking mechanism; one end of the fixed sleeve is fixedly sleeved on the mandrel, the other end of the fixed sleeve is provided with a guide hole, the guide hole is coaxial with the fixed sleeve, the bottom of the guide hole is provided with a circle of first conical surface, three axial holes which are radially outwardly communicated along the fixed sleeve are uniformly formed around the first conical surface, and three movable balls are respectively matched in the three axial holes; the movable sleeve and the fixed sleeve are coaxially arranged, one end of the movable sleeve is provided with a guide part in sliding fit with the guide hole, the bottom of the guide part is provided with a circle of second conical surfaces for jacking the three movable balls, and the second conical surfaces of the guide part are adapted to the first conical surfaces of the guide hole; the other end of the movable sleeve is connected with a spring, the pressing plate is driven by the jacking mechanism, and pressure is applied to the movable sleeve through the spring.
Description
Technical Field
The utility model belongs to the technical field of the frock clamp technique and specifically relates to a modular inner hole locator.
Background
When machining or detecting accuracy of an annular workpiece such as a ring gear, for example, external tooth finishing, ring gear punching, ring gear radial run-out detection, or the like, it is necessary to mount the workpiece on a mandrel and to ensure concentricity between the workpiece and the mandrel. If the workpiece is directly installed on the mandrel by using a flat key or a bolt, the mandrel and the workpiece can have an eccentric problem, so that the machined workpiece has deviation, or the detection result deviates from the real data too much, and the problem is still to be solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming not enough among the above-mentioned background art, provide a modular inner hole locator, can ensure that work piece and dabber keep highly concentric, have simple structure, convenient to use, the lower technical characterstic of cost.
The technical purpose of the utility model is realized like this:
a combined inner hole positioner comprises a fixed sleeve, a movable sleeve, three movable balls, a spring, a pressing plate and a jacking mechanism; one end of the fixed sleeve is fixedly sleeved on the mandrel, the other end of the fixed sleeve is provided with a guide hole, the guide hole is coaxial with the fixed sleeve, the bottom of the guide hole is provided with a circle of first conical surface, three axial holes which are radially outwardly communicated along the fixed sleeve are uniformly formed around the first conical surface, and three movable balls are respectively matched in the three axial holes; the movable sleeve and the fixed sleeve are coaxially arranged, one end of the movable sleeve is provided with a guide part in sliding fit with the guide hole, the bottom of the guide part is provided with a circle of second conical surfaces for jacking the three movable balls, and the second conical surfaces of the guide part are adapted to the first conical surfaces of the guide hole; the other end of the movable sleeve is connected with a spring, the pressing plate is driven by the jacking mechanism, and pressure is applied to the movable sleeve through the spring.
Preferably, the axial hole is in clearance fit with the movable ball, the diameter of the outer end of the axial hole is reduced and smaller than that of the movable ball, and the movable ball is prevented from falling out of the axial hole.
Preferably, the jacking mechanism is a cylinder or a hydraulic cylinder.
The utility model has the advantages that: the utility model discloses a fixed cover is concentric with the dabber, and through the conical surface roof pressure of movable sleeve, three movable ball is synchronous outside ejecting, and the roof pressure is at the inner circle of work piece for the work piece is also concentric with fixed cover, and consequently work piece and dabber are also concentric, and the great error appears in the work piece of avoiding processing out, and overall structure is simple, convenient operation, and the cost is also lower.
Drawings
Fig. 1 is a schematic view of the main view structure of the utility model in a relaxed state.
Fig. 2 is a schematic top view of the pouch of fig. 1.
Fig. 3 is a schematic view of the top-pressed structure of the present invention.
Fig. 4 is a schematic top view of the pouch of fig. 3.
Detailed Description
The present invention will be further explained with reference to the drawings.
As shown in fig. 1 to 4, the present invention provides a combined inner hole positioner, which comprises a fixed sleeve 2, a movable sleeve 7, three movable balls 10 (generally steel balls), a spring 8, a pressing plate 9, and a pressing mechanism 14 (generally an air cylinder or a hydraulic cylinder).
One end of the fixed sleeve 2 is fixed on the mandrel 1 through the inner hole 12 of the fixed sleeve, so that the fixed sleeve 2 is coaxial with the mandrel 1, the other end of the fixed sleeve 2 is provided with a guide hole 4, the guide hole 4 is coaxial with the fixed sleeve 2, and obviously, the diameter of the guide hole 4 is larger than the inner hole 12 of the fixed sleeve 2. The bottom of the guide hole 4 is provided with a circle of first conical surface 3, three axial holes 11 which are radially and outwards communicated along the fixed sleeve 2 are uniformly formed around the first conical surface 3, three movable balls 10 are respectively in clearance fit in the three axial holes 11, the diameter of the outer end of each axial hole 11 is reduced by 1-3 mm and is smaller than that of each movable ball 10, and the movable balls 10 are prevented from being separated from the axial holes 11.
The movable sleeve 7 and the fixed sleeve 2 are coaxially arranged, one end of the movable sleeve 7 is provided with a guide part 6 in sliding fit with the guide hole 4, the bottom of the guide part 6 is provided with a circle of second conical surfaces 5 for jacking and pressing the three movable balls 10, and the second conical surfaces 5 of the guide part 6 are adapted to the first conical surfaces 3 of the guide hole 4. The other end of the movable sleeve 7 is connected with a spring 8, the pressing plate 9 is connected with and driven by a jacking mechanism 14, when the jacking mechanism 14 is pushed out, the pressing plate 9 applies pressure to the movable sleeve 7 through the spring 8, and when the jacking mechanism 14 is contracted, the pressing plate 9 applies tension to the movable sleeve 7 through the spring 8.
The utility model discloses a theory of operation is: firstly, sleeving an annular workpiece 13 outside three movable balls 10 of a fixed sleeve 2, then installing the fixed sleeve 2 on a mandrel 1, or keeping the mandrel 1 and the fixed sleeve 2 fixed, sleeving the annular workpiece 13 and then clamping the mandrel 1 on a machine tool; as shown in fig. 3 and 4, the pressing mechanism 14 is then activated to force the pressing plate 9 to press the spring 8, the spring 8 applies force to the movable sleeve 7, the second conical surface 5 of the movable sleeve 7 presses the movable ball 10 outwards, the movable ball 10 rolls outwards, a part of the spherical surface protrudes out of the outer wall of the fixed sleeve 2 from the axial hole 11 (which can be regarded as the diameter expansion of the fixed sleeve 2) and presses against the inner wall of the annular workpiece 13, the annular workpiece 13 is made to be coaxial with the fixed sleeve 2 by the three movable balls 10, the annular workpiece 13 is also made to be coaxial with the mandrel 1, and the annular workpiece 13 can be machined or detected. As shown in fig. 1 and 2, after the machining or the detection is completed, the pressing mechanism 14 retracts, the pressure of the pressing plate 9 on the spring 8 is gradually reduced, finally the pressing plate 9 can pull the movable sleeve 7 through the spring 8, the second conical surface 5 does not press the movable ball 10 any more, the annular workpiece 13 is shaken to enable the movable ball 10 to retract into the axial hole 11, the annular workpiece 13 is not pressed tightly any more, and the annular workpiece 13 can be removed after the fixed sleeve 2 is removed from the mandrel 1 or the mandrel 1 is removed from the machine tool.
The above description is only a preferred embodiment of the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A combined inner hole positioner comprises a fixed sleeve (2), a movable sleeve (7), three movable balls (10), a spring (8), a pressing plate (9) and a jacking mechanism (14); one end of the fixed sleeve (2) is fixedly sleeved on the mandrel (1), the other end of the fixed sleeve is provided with a guide hole (4), the guide hole (4) is coaxial with the fixed sleeve (2), the bottom of the guide hole (4) is provided with a circle of first conical surface (3), three axial holes (11) which are radially and outwards communicated along the fixed sleeve (2) are uniformly formed around the first conical surface (3), and three movable balls (10) are respectively matched in the three axial holes (11); the movable sleeve (7) and the fixed sleeve (2) are coaxially arranged, one end of the movable sleeve (7) is provided with a guide part (6) in sliding fit with the guide hole (4), the bottom of the guide part (6) is provided with a circle of second conical surface (5) for jacking the three movable balls (10), and the second conical surface (5) of the guide part (6) is adapted to the first conical surface (3) of the guide hole (4); the other end of the movable sleeve (7) is connected with a spring (8), the pressing plate (9) is driven by a jacking mechanism (14), and pressure is applied to the movable sleeve (7) through the spring (8).
2. The modular bore locator of claim 1, wherein: axial hole (11) and activity ball (10) clearance fit, the outer end diameter of axial hole (11) reduces, is less than the diameter of activity ball (10), avoids activity ball (10) to deviate from axial hole (11).
3. A modular bore locator according to claim 1 or claim 2 wherein: the jacking mechanism (14) is a cylinder or a hydraulic cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921729593.XU CN210757340U (en) | 2019-10-15 | 2019-10-15 | Combined inner hole positioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921729593.XU CN210757340U (en) | 2019-10-15 | 2019-10-15 | Combined inner hole positioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210757340U true CN210757340U (en) | 2020-06-16 |
Family
ID=71062354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921729593.XU Expired - Fee Related CN210757340U (en) | 2019-10-15 | 2019-10-15 | Combined inner hole positioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210757340U (en) |
-
2019
- 2019-10-15 CN CN201921729593.XU patent/CN210757340U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200616 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |