CN217890242U - Eccentric calibration positioning fixture for shaft blank - Google Patents
Eccentric calibration positioning fixture for shaft blank Download PDFInfo
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- CN217890242U CN217890242U CN202221726043.4U CN202221726043U CN217890242U CN 217890242 U CN217890242 U CN 217890242U CN 202221726043 U CN202221726043 U CN 202221726043U CN 217890242 U CN217890242 U CN 217890242U
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Abstract
The utility model discloses an eccentric calibration positioning fixture for axle blank, which comprises a chuck, two-way lead screw sliding sleeve subassembly, two clamping jaws, reverse drive subassembly, and take out the axle, two-way lead screw sliding sleeve subassembly includes two sets of lead screws, the sliding sleeve, the hand nut that revolves, the inboard axle head of lead screw still is provided with the transmission helical gear, transmission helical gear and reverse drive subassembly cooperation, reverse drive subassembly is including guide helical gear, cross guiding shaft and spacing seat, this positioning fixture utilizes two clamping jaws of two lead screw sliding sleeve subassembly drive to be synchronous, with the speed, reverse motion, carry out the clamping to eccentric blank, and utilize the axle of taking out to adjust butt joint locking relation, after reverse drive subassembly butt joint locking, can be with two lead screws with synchronous, with the speed, the mode of same direction drives two clamping jaws and removes along same direction, and then adjust eccentric interval, make the blank wait the axis and the main shaft coincidence of the cylinder structure of processing, to the lathe work of eccentric blank, promote the machining efficiency and the processingquality of product.
Description
Technical Field
The utility model relates to a machine tool equipment technical field, concretely relates to an eccentric calibration positioning fixture for axle blank.
Background
The numerical control machine tool is gradually popularized in machining and production, a numerical control machining process becomes a foundation stone developed by modern advanced manufacturing industry and becomes a booster for industrial production, various clamping tools are available in the aspect of clamping workpieces by a carrying platform on the numerical control machine tool, a blank in the prior art needs to be turned by the numerical control machine tool, but the blank is not a cylinder and has serious eccentricity, and for the clamping and positioning of the part, a traditional three-jaw chuck cannot be used for positioning and clamping, but only a CNC machining center with more expensive equipment can be used for numerical control programming and milling, especially, the problem of large interpolation operation existing in a feed path of a milling cutter in programming is considered, so that the irrational feed path of the surface which should be turned occurs, the quality of a product is reduced, and the production and machining efficiency of the product is also reduced. In order to calibrate the cylindrical surface to be turned of the blank to the axis of the rotating main shaft, a positioning clamp capable of adjusting the eccentric distance needs to be specially designed, the requirements of numerical control turning of the blanks with different eccentric distances are met, and the processing efficiency and the processing quality of products are improved.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the purpose: in view of the problem that the numerical control turning process of a blank with serious eccentricity is difficult to realize in the background art, the technical requirement that the turning surface quality of the machined blank is convenient to improve by adopting numerical control turning is needed to be specially designed due to the fact that the existing positioning and clamping means are insufficient, the eccentric calibration positioning clamp for the shaft blank is designed, the eccentric blank can be turned by the numerical control machine, and the machining efficiency and the machining quality of a product are improved.
The technical scheme adopted for solving the problems is as follows:
an eccentric calibration positioning fixture for a shaft blank comprises a chuck, a bidirectional screw rod sliding sleeve component, two clamping jaws, a reverse transmission component and a core pulling shaft for adjusting the locking relationship between a screw rod and the reverse transmission component,
the bidirectional screw rod sliding sleeve assembly comprises two groups of screw rods with opposite screw thread directions and same lead distances, sliding sleeves and hand-screw nuts, the screw rods are in threaded fit with the sliding sleeves, the centers of the screw rods are communicated and are in through-fit with a core-pulling shaft, the two sliding sleeves are respectively and fixedly connected with the lower end faces of the two clamping jaws, sliding blocks are also and symmetrically fixedly connected with the two sides of the lower end faces of the clamping jaws, the sliding blocks are matched with sliding grooves which are arranged on a chuck in parallel and slide linearly along the radial direction, the hand-screw nuts are fixedly connected with the outer side shaft ends of the screw rods, the centers of the hand-screw nuts are communicated and are in clearance fit with the core-pulling shaft, the inner side shaft ends of the screw rods are also provided with transmission bevel gears which are matched with a reverse transmission assembly to realize synchronous, same-speed and reverse rotation of the two screw rods, and the center holes of the two screw rods are both provided with synchronous key grooves which are matched with synchronous locking keys arranged on the core-pulling shaft,
the reverse transmission assembly comprises a guide bevel gear, a cross-shaped guide shaft and a limiting seat fixedly connected to the middle of the guide shaft, the guide bevel gear is movably connected with four shaft heads of the guide shaft in a matched mode, the guide bevel gear and the transmission bevel gear are in meshed transmission with a vertical posture, two lead screws which are coaxially arranged are connected through meshed transmission of the guide bevel gear, a limiting key groove is formed in the center of the limiting seat, the core pulling shaft is pushed, and a reverse locking key arranged in the middle of the core pulling shaft is matched with the limiting key groove to achieve positioning limiting.
Further, the distance between the two synchronous key grooves is equal to the distance between the two synchronous locking keys.
Further, reverse locking key, synchronous locking key all are provided with the fillet in cooperation direction one end to realize the keyway cooperation smoothly.
Furthermore, a bearing seat used for positioning the screw rod is matched with the outer side of the screw rod, and the bearing seat is fixedly connected to the chuck.
Further, a bearing is arranged between the screw rod and the core pulling shaft to ensure that the core pulling shaft and the screw rod rotate coaxially.
Furthermore, V-shaped clamping grooves are formed in the inner side faces of the two clamping jaws to position and clamp the eccentric shaft blank.
Furthermore, buttons are fixedly connected to two ends of the core pulling shaft and used for manually pressing a locking relation between the adjusting screw rod and the reverse transmission assembly.
The utility model has the advantages that:
this an eccentric calibration positioning anchor clamps for axle blank utilizes two-way lead screw sliding sleeve subassembly to drive two clamping jaws and is synchronous, with fast, reverse motion, carry out the clamping to middle eccentric blank, and utilize the axle of taking out to adjust the butt joint locking relation, with the back of reverse drive subassembly butt joint locking, can drive two clamping jaws with two lead screws of two-way lead screw sliding sleeve subassembly with synchronous, with fast, the mode of syntropy motion removes along same direction, and then adjust eccentric interval, the axis that makes the blank treat the cylinder structure of processing coincides with the main shaft of digit control machine tool, can utilize the lathe work of digit control machine tool to eccentric blank, promote the machining efficiency and the processingquality of product.
Drawings
FIG. 1 is a schematic structural view of an eccentric calibration positioning fixture for a shaft blank according to the present embodiment;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
FIG. 3 is an enlarged partial cross-sectional view taken at B in FIG. 1;
FIG. 4 is an enlarged partial cross-sectional view taken at C of FIG. 1;
FIG. 5 is a cross-sectional view of the reverse locking key of the present embodiment in cooperation with a key slot for limiting;
wherein, 1-a first clamping jaw, 2-a sliding block, 3-a sliding chute, 4-a first screwing nut, 5-a first button, 6-a sliding sleeve, 7-a first screw rod, 8-a blank, 9-a chuck, 10-a second screw rod, 11-a second button, 12-a second screwing nut, 13-a second clamping jaw, 14-a drawing core shaft, 15-a bearing, 16-a transmission helical gear, 17-a guide helical gear, 18-a reverse locking key, 19-a limiting seat, 20-a guide shaft, 21-a first synchronous locking key, 22-a synchronous key groove, 23-a second synchronous locking key, 24-a fillet and 25-a limiting key groove.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1-5, the present embodiment provides an eccentric calibration positioning fixture for a shaft blank 8, which includes a chuck 9, a bidirectional screw sliding sleeve 6 assembly, two clamping jaws, a reverse transmission assembly, and a core pulling shaft 14 for adjusting the locking relationship between the screw and the reverse transmission assembly.
Specifically, referring to fig. 1, fig. 2 and fig. 3, the bidirectional screw rod sliding sleeve 6 assembly includes two sets of screw rods with opposite screw thread turning directions and same lead lengths, a sliding sleeve 6 and a hand nut, the screw rods include a first screw rod 7 and a second screw rod 10, the screw thread turning directions are opposite and the lead lengths are the same so as to ensure that the two screw rods synchronously rotate at the same speed, at the same direction or in reverse directions, the screw rods are in threaded fit with the sliding sleeve 6, the centers of the screw rods are communicated and fit through a drawing core shaft 14, the two sliding sleeves 6 are respectively fixedly connected to the lower end surfaces of the two clamping jaws, the clamping jaws include a first clamping jaw 1 and a second clamping jaw 13, the two sides of the lower end surfaces of the clamping jaws are further symmetrically and fixedly connected with a sliding block 2, the sliding block 2 is matched with a sliding groove 3 arranged in parallel on a chuck 9 to linearly slide along a radial direction, the hand nut includes a first hand nut 4 and a second hand nut 12, the hand nut is fixedly connected to the outer side of the screw rod, the center of the hand nut is communicated with the drawing core shaft 14 and in clearance fit with the drawing core shaft 14, the inner shaft end of the screw rod is further provided with a transmission 16, the reverse transmission assembly to realize synchronous, and the two screw rods synchronously lock keys 22 are provided with the screw rods.
Referring to fig. 2, the reverse transmission assembly includes a guide bevel gear 17, a cross-shaped guide shaft 20 and a limit seat 19 fixedly connected to the middle of the guide shaft 20, the guide bevel gear 17 is movably connected to four shaft heads of the guide shaft 20 in a matching manner, the guide bevel gear 17 and the transmission bevel gear 16 are in meshing transmission in a vertical posture, two screw rods coaxially arranged are connected in a meshing transmission manner through the guide bevel gear 17, a limit key slot 25 is arranged at the center of the limit seat 19, and the reverse locking key 18 arranged at the middle of the core pulling shaft 14 is matched with the limit key slot 25 to realize positioning limit under the pushing action of the core pulling shaft 14.
In a further embodiment, the distance between the two synchronization keys 22 is equal to the distance between the first synchronization locking key 21 and the second synchronization locking key 23.
In a further embodiment, referring to fig. 2, 3 and 4, the reverse locking key 18, the first synchronous locking key 21 and the second synchronous locking key 23 are all provided with a rounded corner 24 at one end in the mating direction, so as to smoothly realize the key-slot mating.
In a further embodiment, a bearing seat (not shown in the figure) for positioning the screw rod is further matched on the outer side of the screw rod, and the bearing seat is fixedly connected on the chuck 9.
In a further embodiment, referring to fig. 1, a bearing 15 is further disposed between the screw rod and the core pulling shaft 14 to ensure that the core pulling shaft 14 and the screw rod rotate coaxially.
In a further embodiment, referring to fig. 1, V-shaped clamping grooves are formed in the inner side surfaces of the two clamping jaws to position and clamp the eccentric shaft blank 8.
In a further embodiment, referring to fig. 1, the two ends of the core shaft 14 are fixedly connected with buttons, including a first button 5 and a second button 11, for manually pressing the locking relationship between the adjusting screw rod and the reverse transmission assembly.
Furthermore, the butt joint locking relation between the synchronous locking key and the synchronous key groove and the butt joint locking relation between the limiting key groove and the reverse locking key are not performed simultaneously, and the butt joint locking relation is realized by the alternate pushing action of the first button and the second button respectively.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes, modifications, substitutions and alterations can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims (7)
1. An eccentric calibration positioning fixture for a shaft blank, characterized by: comprises a chuck, a bidirectional screw rod sliding sleeve component, two clamping jaws, a reverse transmission component and a core pulling shaft used for adjusting the locking relation between a screw rod and the reverse transmission component,
the bidirectional screw rod sliding sleeve assembly comprises two groups of screw rods with opposite screw thread directions and same lead distances, sliding sleeves and hand-screw nuts, the screw rods are in threaded fit with the sliding sleeves, the centers of the screw rods are communicated and are in through-fit with a core-pulling shaft, the two sliding sleeves are respectively and fixedly connected with the lower end faces of the two clamping jaws, sliding blocks are also and symmetrically fixedly connected with the two sides of the lower end faces of the clamping jaws, the sliding blocks are matched with sliding grooves which are arranged on a chuck in parallel and slide linearly along the radial direction, the hand-screw nuts are fixedly connected with the outer side shaft ends of the screw rods, the centers of the hand-screw nuts are communicated and are in clearance fit with the core-pulling shaft, the inner side shaft ends of the screw rods are also provided with transmission bevel gears which are matched with a reverse transmission assembly to enable the two screw rods to synchronously, synchronously and reversely rotate at the same speed, and the center holes of the two screw rods are both provided with synchronous key grooves which are matched with synchronous locking keys arranged on the core-pulling shaft,
the reverse transmission assembly comprises a guide bevel gear, a cross-shaped guide shaft and a limiting seat fixedly connected to the middle of the guide shaft, the guide bevel gear is movably connected with four shaft heads of the guide shaft in a matched mode, the guide bevel gear and the transmission bevel gear are in meshed transmission with a vertical posture, two lead screws which are coaxially arranged are connected through meshed transmission of the guide bevel gear, a limiting key groove is formed in the center of the limiting seat, the core pulling shaft is pushed, and a reverse locking key arranged in the middle of the core pulling shaft is matched with the limiting key groove to achieve positioning limiting.
2. The eccentric alignment positioning fixture for shaft blanks of claim 1, wherein: the distance between the two synchronous key grooves is equal to the distance between the two synchronous locking keys.
3. The eccentric alignment positioning fixture for shaft blanks of claim 1, wherein: and the reverse locking key and the synchronous locking key are provided with round corners at one end in the matching direction.
4. The eccentric alignment positioning fixture for shaft blanks of claim 1, wherein: the outer side of the screw rod is also matched with a bearing seat used for positioning the screw rod, and the bearing seat is fixedly connected to the chuck.
5. The eccentric alignment positioning fixture for shaft blanks of claim 1, wherein: and a bearing is also arranged between the screw rod and the core-pulling shaft.
6. The eccentric alignment positioning fixture for shaft blanks of claim 1, wherein: the inner side surfaces of the two clamping jaws are provided with V-shaped clamping grooves.
7. The eccentric alignment positioning fixture for shaft blanks of claim 1, wherein: and two ends of the core-pulling shaft are fixedly connected with buttons.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221726043.4U CN217890242U (en) | 2022-07-05 | 2022-07-05 | Eccentric calibration positioning fixture for shaft blank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221726043.4U CN217890242U (en) | 2022-07-05 | 2022-07-05 | Eccentric calibration positioning fixture for shaft blank |
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| Publication Number | Publication Date |
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| CN217890242U true CN217890242U (en) | 2022-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221726043.4U Active CN217890242U (en) | 2022-07-05 | 2022-07-05 | Eccentric calibration positioning fixture for shaft blank |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117245574A (en) * | 2023-10-08 | 2023-12-19 | 江苏盐发机械有限公司 | A valve processing platform with rotating function |
-
2022
- 2022-07-05 CN CN202221726043.4U patent/CN217890242U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117245574A (en) * | 2023-10-08 | 2023-12-19 | 江苏盐发机械有限公司 | A valve processing platform with rotating function |
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