CN216780985U - Inner shaft fixing tool - Google Patents
Inner shaft fixing tool Download PDFInfo
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- CN216780985U CN216780985U CN202220135022.9U CN202220135022U CN216780985U CN 216780985 U CN216780985 U CN 216780985U CN 202220135022 U CN202220135022 U CN 202220135022U CN 216780985 U CN216780985 U CN 216780985U
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- inner shaft
- main body
- tool main
- fixing
- fixing frame
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Abstract
An interior axle fixing frock includes: the tool comprises a tool main body, wherein the tool main body is provided with a positioning ring, the positioning ring comprises two positioning inclined planes which are symmetrically arranged, and a positioning bolt is arranged on the tool main body; the fixture comprises a fixing frame, wherein a U-shaped notch is formed in the fixing frame, and the fixing frame is perpendicular to the tool main body. The utility model unifies the processing reference of turning and grinding, combines the keyway processing and the excircle turning processing of the inner shaft, not only ensures the symmetry degree of the keyway, but also reduces the alignment time, and also improves the processing efficiency and the processing quality.
Description
Technical Field
The utility model belongs to the technical field of shafting device machining, and particularly relates to an inner shaft fixing tool.
Background
In the field of machining, a typical counter-rotating assembly structure comprises an inner shaft support assembly and an outer rotor front end cover assembly, wherein the inner shaft support assembly and the outer rotor front end cover assembly are two typical shafting assemblies and are one of key structures for transmitting power of the whole motor.
The inner shaft support assembly comprises an inner shaft, an inner rotor support and a lining, wherein the inner shaft, the inner rotor support and the lining are in transition fit and are assembled through two flat keys. Due to tight tolerance fit, the requirement on the machining precision of the key groove on the inner shaft is high (the tolerance is less than 0.025 mm).
In the prior art, the conventional processing technology for the inner shaft bracket assembly is as follows: after the outer circle of the inner shaft is machined (after the inner shaft is finely repaired), the machining center aligns the inner shaft, the radial tolerance of the inner shaft is smaller than 0.01mm, and then the key groove is milled and formed.
The traditional processing mode has the defects of long alignment time, difficulty in ensuring the processing size precision, influence on assembly requirements and the like.
SUMMERY OF THE UTILITY MODEL
Problem (A)
In summary, how to improve the processing precision of the inner shaft in the inner shaft bracket assembly and effectively shorten the time for aligning the inner shaft becomes a problem to be solved by those skilled in the art.
(II) technical scheme
The utility model provides an inner shaft fixing tool, which comprises:
the tool comprises a tool main body, wherein the tool main body is provided with a positioning ring, the positioning ring comprises two symmetrically-arranged positioning inclined planes which are used for being in contact with an inner shaft to be fixed, the two positioning inclined planes form a V-shaped structure, a positioning bolt is arranged on the tool main body and is in threaded connection with the tool main body, one end of the positioning bolt is a clamping end, and the clamping end can penetrate through the tool main body and penetrate into the positioning ring and is used for being in contact with the inner shaft to be fixed and clamping the inner shaft to be fixed;
the fixture comprises a fixing frame, wherein a U-shaped notch and a clamping jaw used for being assembled on the three-jaw chuck are formed in the fixing frame, and the fixing frame is perpendicular to the tool main body.
Preferably, in the inner shaft fixing tool provided by the utility model, the positioning ring comprises an arc section, the radian of the arc section is at least 1 pi, the arc section and the outer edge of the tool main body are concentrically arranged, and a large opening end of a V-shaped structure formed by the two positioning inclined planes is connected with the two sections of the arc section.
Preferably, in the inner shaft fixing tool provided by the utility model, a clamping groove is arranged on the outer edge of the tool main body, and the center line of the clamping groove, the middle point of the arc section and the center of the outer edge of the tool main body are located in the same plane.
Preferably, in the inner shaft fixing tool provided by the utility model, one end of the fixing frame is provided with the U-shaped notch, and the other end of the fixing frame is clamped in the clamping groove and fixed through a bolt.
Preferably, in the inner shaft fixing tool provided by the utility model, a threaded hole is formed through the midpoint of the clamping groove, a fixing frame through hole corresponding to the threaded hole is formed in the fixing frame, and the positioning bolt penetrates through the fixing frame through hole and is in threaded fit with the threaded hole.
Preferably, in the inner shaft fixing tool provided by the utility model, a fixing bolt is in threaded connection with the fixing frame, and the tail end of the fixing bolt can penetrate through the fixing frame and into the U-shaped notch; preferably, the number of the fixing bolts is two, and the two fixing bolts are arranged oppositely.
Preferably, in the inner shaft fixing tool provided by the utility model, the tool main body is of a metal structure, the tool main body is of an integrated structure, and the outer edge of the tool main body is circular; the fixing frame is of a metal structure and is of an integrated structure.
(III) advantageous effects
The utility model provides an inner shaft fixing tool, which comprises: the tool comprises a tool main body, wherein the tool main body is provided with a positioning ring, the positioning ring comprises two symmetrically-arranged positioning inclined planes which are used for being in contact with an inner shaft to be fixed, the two positioning inclined planes form a V-shaped structure, a positioning bolt is arranged on the tool main body and is in threaded connection with the tool main body, one end of the positioning bolt is a clamping end, and the clamping end can penetrate through the tool main body and penetrate into the positioning ring and is used for being in contact with the inner shaft to be fixed and clamping the inner shaft to be fixed; the fixture comprises a fixing frame, wherein a U-shaped notch is formed in the fixing frame and is used for being assembled on one clamping jaw of the three-jaw chuck, and the fixing frame is perpendicular to the tool main body.
Through the design of the structure and the method, the processing reference of turning and grinding is unified when the inner shaft is produced in batch, and the keyway processing and the excircle turning processing of the inner shaft are combined.
Drawings
FIG. 1 is a front view of an inner shaft fixing tool in an embodiment of the utility model;
FIG. 2 is a top view of an inner shaft fixing tool in an embodiment of the utility model;
fig. 3 is a schematic structural view of the inner shaft fixed on the machine tool in the embodiment of the utility model.
In fig. 1 to 3, the correspondence between the part names and the reference numerals is:
the tool comprises a tool main body 1, a positioning inclined plane 2, a positioning bolt 3, a fixing frame 4, a U-shaped notch 5, an inner shaft 6, a three-jaw chuck 7 and a machine tool tailstock 8.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
In addition, in the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention but do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected" and "connected" used herein should be interpreted broadly, and may include, for example, a fixed connection or a detachable connection; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.
Referring to fig. 1 to 3, in which fig. 1 is a front view of an inner shaft fixing tool in an embodiment of the present invention; FIG. 2 is a top view of an inner shaft fixing tool in an embodiment of the utility model; fig. 3 is a schematic structural view of the inner shaft fixed on the machine tool in the embodiment of the utility model.
The utility model provides an inner shaft fixing tool which is used for realizing circumferential fixing of shaft parts (for example, when the inner shaft 6 is machined, two ends of the inner shaft 6 are fixed by tops, circumferential rotation is easy to occur, and machining precision is reduced), so that the circumferential rotation problem of the shaft parts in a double-top clamping mode is solved (if the shaft parts are circumferentially rotated during machining, even very small deviation occurs, machining precision is reduced).
In the utility model, the inner shaft fixing tool comprises the following components:
1. the tool body 1.
The tool main body 1 is a main part for fixing and clamping the shaft part (the inner shaft 6), and in an actual use state, the tool main body 1 is fixedly arranged relative to a machining machine tool, and the shaft part is clamped in the tool main body 1, so that the shaft part is fixed relative to the machining machine tool (the shaft part can be fixed along the axis and can be fixed along the circumferential direction).
The tool main body 1 is provided with a positioning ring, the shaft part penetrates through the positioning ring to penetrate through the tool main body 1, the outer surface of the shaft part can be abutted to the inner side face of the positioning ring, and the shaft part and the tool main body 1 are relatively fixed in a three-point fixing mode.
The outer surface of the shaft part is a curved surface, the positioning ring comprises two symmetrically arranged positioning inclined planes 2 which are used for being in contact with an inner shaft 6 to be fixed, the positioning inclined planes 2 are in point contact (actually in a line contact mode) with the outer surface of the shaft part, and the two positioning inclined planes 2 form a V-shaped structure and are used for realizing two-point contact with the shaft part. Based on the positioning inclined planes 2, the positioning bolt 3 is further arranged on the tool main body 1, the positioning bolt 3 is in threaded connection with the tool main body 1, one end of the positioning bolt 3 is a clamping end, the clamping end can penetrate through the tool main body 1 and penetrate into the positioning ring and is used for being in contact with an inner shaft 6 to be fixed and clamping the inner shaft 6 to be fixed, and the positioning bolt 3 is matched with the two positioning inclined planes 2 and can be in three-point contact with a shaft part, so that the shaft part is fixed.
2. A fixed frame 4.
From the above, the main function of the tool main body 1 is to realize 'holding tightly' with the shaft parts, and meanwhile, the tool main body 1 should be fixed relative to the processing machine tool. The utility model provides a fixing frame 4, wherein the fixing frame 4 is connected with a tool main body 1 and has the following functions: and a certain structure on the processing machine tool is fixedly connected, so that the fixture body 1 is fixed relative to the processing machine tool.
Specifically, the fixing frame 4 is provided with a U-shaped notch 5 and a jaw for being assembled to a three-jaw chuck 7 (the three-jaw chuck 7 is a clamping structure on a processing machine tool), and the fixing frame 4 is perpendicular to the tool main body 1 (namely, an included angle of 90 degrees is formed between the fixing clamp and the tool main body 1).
Further, the specific structure of the positioning ring is as follows: the positioning ring is of a special-shaped ring structure and comprises an arc section, the radian of the arc section is at least 1 pi (in a preferred embodiment of the utility model, the radian of the arc section is 1 pi), the arc section and the outer edge of the tool main body 1 (the outer edge of the tool main body 1 is circular) are concentrically arranged, and a large opening end of a V-shaped structure formed by the two positioning inclined planes 2 is connected with two sections of the arc section.
In another embodiment of the present invention, the positioning ring may be a regular triangle ring structure, and the centroid of the positioning ring is concentric with the outer edge of the tool main body 1.
In the utility model, the tool body 1 and the fixing frame 4 are two independent components, and the fixing frame 4 should be installed on the tool body 1 in a certain fixed connection mode. In order to improve the fixed connection strength of the fixing clamp on the tool main body 1, the clamping groove is arranged on the outer edge of the tool main body 1 and is a U-shaped groove, and the center line of the clamping groove, the middle point of the arc section and the center of the outer edge of the tool main body 1 are located in the same plane.
Furthermore, a threaded hole is formed in the middle point of the clamping groove, a fixing frame 4 through hole corresponding to the threaded hole is formed in the fixing frame 4, and the positioning bolt 3 penetrates through the fixing frame 4 through hole to be in threaded fit with the threaded hole.
Specifically, one end of the fixing frame 4 is provided with a U-shaped notch 5, and the other end of the fixing frame 4 is clamped in the clamping groove and fixed through a bolt. Meanwhile, the utility model is also provided with a fixing bolt, the fixing bolt is in threaded connection with the fixing frame 4, and the tail end of the fixing bolt can penetrate through the fixing frame 4 and penetrate into the U-shaped notch 5. Preferably, two fixing bolts are provided, and the two fixing bolts are arranged oppositely. Be provided with two fixing bolt and can improve the firm degree that the fixation clamp is connected for the jack catch.
Specifically, the tool main body 1 is of a metal structure, the tool main body 1 is of an integrated structure, and the outer edge of the tool main body 1 is circular.
Specifically, the fixing frame 4 is a metal structure, and the fixing frame 4 is an integrated structure.
The utility model also provides a method for clamping, fixing and processing the inner shaft double-centre, which comprises the following steps:
step one, fixing two ends of an inner shaft 6 in a double-tip clamping mode, and unifying machining references (in the utility model, the machining references of turning, milling and grinding are inner holes at two ends of the inner shaft 6, and the utility model realizes the structure alignment and fixation of the inner shaft 6 by using the double tips to jack the inner holes at two ends of the inner shaft 6).
And step two, sleeving the inner shaft fixing tool on the inner shaft 6, fixing the inner shaft fixing tool relative to the processing machine tool, and clamping the inner shaft 6 through the positioning bolt 3.
And step three, carrying out external circle turning and groove structure grinding on the inner shaft 6.
In the first step, a three-jaw chuck 7 and a machine tool tailstock 8 are arranged at the turning and milling composite center corresponding to two ends of an inner shaft 6 to be machined, a center to be machined is fixed on the three-jaw chuck 7, a 60-degree standard center is fixed on the machine tool tailstock 8, then the center to be machined is turned on line to form a 60-degree conical surface, and the 60-degree standard center and the machined center tightly push against an inner hole of the inner shaft 6.
Specifically, in step three, the outer circle of the inner shaft 6 is turned first, and then the groove structure milling process is performed on the inner shaft 6.
The utility model aims to provide a milling method for a shaft key groove in a double-tip clamping state, which can ensure the symmetry requirement of the key groove and improve the processing precision of a shaft.
Specifically, the main technical problems to be solved by the present invention are summarized as follows:
1. the processing technical requirements of the special motor on the inner shaft 6 are met, and the requirements that the symmetry degree of three key grooves on the high-precision outer circle is less than 0.025mm and the like are met;
2. the key groove processing of the shaft part is generally to clamp one end of an inner shaft 6 by three claws, the other end of the inner shaft 6 is pushed by a 60-degree tip, and milling processing is carried out after the inner shaft 6 is fixed, because one end of the inner shaft 6 is clamped and fixed by the three claws, the alignment and fine adjustment operation of the inner shaft 6 is very difficult to realize, the alignment excircle error is large during processing, and the symmetry degree cannot meet the processing requirement easily;
3. the common heart-shaped chuck used for the top vehicle only can limit the rotation in one direction and is only suitable for turning, and if the key groove is milled and clamped by adopting the method, namely the key groove is only clamped by the jacking force at two ends, the freedom degree in the radial direction is not limited, and the key groove is slightly rotated to some extent, so that the key groove is asymmetric in processing and the size is out of tolerance.
In the traditional technical scheme, because the processing benchmark of turning and grinding is inconsistent, when carrying out keyway processing, carry out alignment processing again after 6 grinding excircles of inner shaft finish, because the keyway symmetry requirement is not more than 0.025mm, consequently, the processing alignment requirement height to 6 of inner shaft, alignment difficulty, it is long to consume time.
After the processing method provided by the utility model is adopted, when the inner shaft 6 is produced in batches, the processing references of turning (fine trimming processing of the inner shaft 6) and grinding (processing of the key groove) are unified, the conical holes with 60 degrees at two ends of the inner shaft 6 are used as the process references (the processing references are unified), the key groove processing and the excircle turning processing of the inner shaft 6 are combined, and due to the unified reference, the symmetry degree of the key groove is ensured, the time for turnover, clamping and alignment and the like is reduced (at least 4 hours is shortened), and the processing efficiency and the processing quality are improved. By converting, unifying the processing reference of turning and grinding, the operations of turning the outer circle of the inner shaft 6, milling the key groove and the like on the processing center are simultaneously completed, and the requirement on the symmetry degree of the key groove is ensured.
The specific operation mode of the utility model is as follows:
1. the turning and milling composite center is provided with a three-jaw chuck 7 and a machine tool tailstock 8, a fixed center is arranged on the machine tool tailstock 8, a center to be processed is clamped through the three-jaw chuck 7, and the end part of the center to be processed is processed into a 60-degree conical surface on line through on-line turning of the center to be processed, so that the center of the conical surface of the processing center and the conical surface of the center clamped on the machine tool tailstock 8 can be kept coaxial in height;
2. and the outer circle of the inner shaft 6 is clamped by utilizing a three-point positioning principle. The utility model designs a V-shaped clamp with a special shape, two inner side surfaces of the V-shaped clamp are in contact with two points of the excircle of the inner shaft 6, then a third point of the excircle of the inner shaft 6 is tightly propped through an adjustable screw arranged at the top of the V-shaped clamp to realize the positioning of the inner shaft 6, and the clamp and the inner shaft 6 can be assembled together through the operation;
3. the bidirectional positioning shifting fork is positioned through a positioning groove arranged at the top of the V-shaped clamp and is fixedly assembled with the V-shaped clamp through a screw;
4. clamping two shifting forks of a bidirectional positioning shifting fork on one clamping jaw of a three-jaw chuck 7, and tightly pushing the clamping jaw of a three-rotation chuck by using an adjusting screw so as to limit the bidirectional rotation freedom degree of an inner shaft 6;
5. positioning is carried out by using 60-degree conical holes arranged at two ends of the inner shaft 6, and the inner shaft 6 is tightly jacked through conical surface contact on the double-tip conical surface, so that the axial positioning and clamping of parts are realized;
6. the clamping of the inner shaft 6 is completed, and the inner shaft 6 and the three claws are fixed together, so that radial and axial displacement cannot be generated;
7. after clamping is completed, the outer circle turning operation and the key groove milling operation are simultaneously carried out on the inner shaft 6, so that the symmetry degree of the key groove and the outer circle reference is ensured to be less than 0.025mm, the subsequent grinding machining reference is also the taper holes at two ends, and the outer circle size and form and position tolerance of the inner shaft 6 are ensured.
Through the technical scheme, the problem of clamping and positioning of double tips during machining of the turning and milling combined machine tool is solved, the reference unification of double tip positioning and grinding of an excircle is realized, and the turning and milling combined machining of the inner shaft 6 is ensured.
When the high-precision shaft part is machined, the utility model particularly provides novel process clamping by converting the reference of different process machining operations such as turning, grinding, milling and the like, solves the problem of low groove milling machining precision of the shaft part in a double-tip clamping state, lays a theoretical foundation for the subsequent machining of the same type of parts, and provides a thought for solving the problem.
As can be seen from the above, the present invention provides an inner shaft fixing tool, including: the tool comprises a tool main body 1, wherein the tool main body 1 is provided with a positioning ring, the positioning ring comprises two symmetrically arranged positioning inclined planes 2 which are used for being in contact with an inner shaft 6 to be fixed, the two positioning inclined planes 2 form a V-shaped structure, a positioning bolt 3 is arranged on the tool main body 1, the positioning bolt 3 is in threaded connection with the tool main body 1, one end of the positioning bolt 3 is a clamping end, and the clamping end can penetrate through the tool main body 1 and penetrate into the positioning ring and is used for being in contact with the inner shaft 6 to be fixed and clamping the inner shaft 6 to be fixed; the fixture comprises a fixing frame 4, wherein a U-shaped notch 5 and a clamping jaw used for being assembled on a three-jaw chuck 7 are arranged on the fixing frame 4, and the fixing frame 4 is perpendicular to the tool main body 1. The utility model also provides a method for clamping, fixing and processing the inner shaft double-centre, which comprises the following steps: fixing two ends of an inner shaft 6 in a double-tip clamping mode, and unifying processing benchmarks; secondly, sleeving the inner shaft fixing tool on the inner shaft 6, fixing the inner shaft fixing tool relative to the processing machine tool, and clamping the inner shaft 6 through the positioning bolt 3; and step three, carrying out external circle turning and groove structure grinding on the inner shaft 6.
Through the design of the structure and the method, the processing reference of turning and grinding is unified when the inner shaft 6 is produced in batches, and the keyway processing and the excircle turning processing of the inner shaft 6 are combined, so that the symmetry degree of the keyway is ensured, the time for turnover clamping alignment and the like is reduced, and the processing efficiency and the processing quality are improved.
It will be appreciated by those skilled in the art that the utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the utility model are intended to be embraced therein.
Claims (7)
1. The utility model provides an interior fixed frock which characterized in that includes:
the tool comprises a tool main body (1), wherein the tool main body is provided with a positioning ring, the positioning ring comprises two symmetrically-arranged positioning inclined planes (2) which are used for being in contact with an inner shaft to be fixed, the two positioning inclined planes form a V-shaped structure, a positioning bolt (3) is arranged on the tool main body and is in threaded connection with the tool main body, one end of the positioning bolt is a clamping end, and the clamping end can penetrate through the tool main body and penetrate into the positioning ring and is used for being in contact with the inner shaft to be fixed and clamping the inner shaft to be fixed;
the fixture comprises a fixing frame (4), wherein a U-shaped notch (5) is formed in the fixing frame, the fixing frame is used for being assembled on a clamping jaw of the three-jaw chuck, and the fixing frame is perpendicular to the tool main body.
2. The inner shaft fixing tool according to claim 1,
the positioning ring comprises an arc section, the radian of the arc section is at least 1 pi, the arc section and the outer edge of the tool main body are concentrically arranged, and a large opening end of a V-shaped structure formed by two positioning inclined planes is connected with the two sections of the arc section.
3. The inner shaft fixing tool according to claim 2,
and a clamping groove is formed in the outer edge of the tool main body, and the center line of the clamping groove, the middle point of the arc section and the circle center of the outer edge of the tool main body are located in the same plane.
4. The inner shaft fixing tool according to claim 3,
one end of the fixing frame is provided with the U-shaped notch, and the other end of the fixing frame is clamped in the clamping groove and fixed through a bolt.
5. The inner shaft fixing tool according to claim 3,
a threaded hole is formed in the middle point of the clamping groove, a fixing frame through hole corresponding to the threaded hole is formed in the fixing frame, and the positioning bolt penetrates through the fixing frame through hole to be in threaded fit with the threaded hole.
6. The inner shaft fixing tool according to claim 1,
a fixing bolt is in threaded connection with the fixing frame, and the tail end of the fixing bolt can penetrate through the fixing frame and penetrate into the U-shaped notch;
the fixing bolts are arranged in two, and the two fixing bolts are arranged oppositely.
7. The inner shaft fixing tool according to claim 1,
the tool main body is of a metal structure, the tool main body is of an integrated structure, and the outer edge of the tool main body is circular;
the fixing frame is of a metal structure and is of an integrated structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220135022.9U CN216780985U (en) | 2022-01-19 | 2022-01-19 | Inner shaft fixing tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220135022.9U CN216780985U (en) | 2022-01-19 | 2022-01-19 | Inner shaft fixing tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216780985U true CN216780985U (en) | 2022-06-21 |
Family
ID=82013350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220135022.9U Active CN216780985U (en) | 2022-01-19 | 2022-01-19 | Inner shaft fixing tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216780985U (en) |
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2022
- 2022-01-19 CN CN202220135022.9U patent/CN216780985U/en active Active
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