CN109702228B - Shaft core assembly and electric spindle - Google Patents
Shaft core assembly and electric spindle Download PDFInfo
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- CN109702228B CN109702228B CN201711017551.9A CN201711017551A CN109702228B CN 109702228 B CN109702228 B CN 109702228B CN 201711017551 A CN201711017551 A CN 201711017551A CN 109702228 B CN109702228 B CN 109702228B
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 13
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 8
- 230000020347 spindle assembly Effects 0.000 claims description 4
- 238000003754 machining Methods 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
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- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014392 establishment of spindle localization Effects 0.000 description 1
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Abstract
The invention discloses a shaft core assembly and an electric spindle, wherein the shaft core assembly comprises a shaft core, a pull rod, a chuck and a positioning structure; the shaft core is provided with a shaft hole which is penetrated along the axial direction, the free end of the shaft core is provided with a clamping section for clamping the cutter, and the clamping section is provided with a through hole which extends along the radial direction of the cross section of the shaft core and penetrates through the shaft core; the pull rod is sleeved in the shaft hole; the clamping head is arranged in the shaft hole of the clamping section, one end of the clamping head is connected with the pull rod, the other end of the clamping head is provided with a clamping hole which is coaxial with the shaft hole and used for the cutter to extend into and be fixed, and the outer peripheral surface of the clamping head is provided with two symmetrical limiting grooves which are communicated with the clamping hole; the positioning structure comprises a positioning pin and a fixing piece, wherein the positioning pin penetrates from one end of the through hole, penetrates out from the other end of the through hole after sequentially penetrating through the limiting groove and the clamping hole, and penetrates into the shaft core to lock and fix the positioning pin. The technical scheme of the invention can improve the axial positioning function of the electric spindle on the cutter, thereby improving the installation precision and the machining efficiency.
Description
Technical Field
The invention relates to the technical field of numerical control machine tools, in particular to a shaft core assembly and an electric spindle.
Background
With the rapid development and the gradual perfection of electric transmission technology, more and more high-speed numerical control machine tools adopt a transmission structure form which combines a spindle motor and a machine tool spindle into a whole, namely an electric spindle. However, in the actual use process of the electric spindle, because the high-speed electric spindle is not generally provided with the axial positioning function of the tool, the axial position of the tool for changing the tool in each machining process has larger deviation, so that the tool needs to be re-set in the machining zero position of the workpiece in each tool changing process, and thus, complicated repeated tool setting actions are brought to operators, and meanwhile, the machining efficiency is also seriously reduced.
Disclosure of Invention
The invention mainly aims to provide a shaft core assembly which aims to improve the axial positioning function of an electric spindle on a cutter.
In order to achieve the above purpose, the shaft core assembly provided by the invention comprises a shaft core, a pull rod, a chuck and a positioning structure; the shaft core is provided with a shaft hole which is penetrated along the axial direction, the free end of the shaft core is provided with a clamping section for clamping a cutter, and the clamping section is provided with a through hole which extends along the radial direction of the cross section of the shaft core and penetrates through the shaft core; the pull rod is sleeved in the shaft hole; the clamping head is arranged in the shaft hole of the clamping section, one end of the clamping head is connected with the pull rod, the other end of the clamping head is provided with a clamping hole which is coaxial with the shaft hole and used for the cutting tool to extend into for fixing, and the outer peripheral surface of the clamping head is provided with two symmetrical limiting grooves which are communicated with the clamping hole; the positioning structure comprises a positioning pin and a fixing piece, wherein the positioning pin penetrates from one end of the through hole, penetrates through the limiting groove and the clamping hole in sequence, then penetrates out from the other end of the through hole, and the fixing piece penetrates into the shaft core to lock and fix the positioning pin.
Preferably, the clamping section of the shaft hole is arranged in a tapered manner which is gradually expanded outwards.
Preferably, the limit groove is a kidney-shaped groove.
Preferably, the clamping holes are arranged to penetrate through two ends of the clamping head, threads are arranged in the clamping holes, and the pull rod is in threaded connection with the clamping holes.
Preferably, an annular groove is formed in the outer peripheral surface of the chuck, a sealing ring is arranged in the annular groove, and the sealing ring is elastically abutted against the inner wall surface of the shaft hole.
Preferably, the clamping section is provided with a first threaded hole penetrating from the outer surface of the shaft core to the through hole, the fixing piece is a machine screw, and the fixing piece is screwed into the threaded hole to lock and fix the positioning pin.
Preferably, the method comprises the steps of,
the shaft core assembly further comprises an elastic piece and a return nut, a first limiting part is arranged on the outer peripheral surface of the pull rod at a position far away from the clamping head, and one end, adjacent to the clamping head, of the pull rod is connected with the return nut;
the hole wall surface of the shaft hole is provided with a second limiting part at a position far away from the chuck, and the second limiting part is positioned between the first limiting part and the return nut;
the elastic piece is sleeved on the pull rod, and two ends of the elastic piece are respectively elastically abutted with the first limiting part and the second limiting part.
Preferably, the elastic piece is a belleville spring, and a plurality of belleville springs are overlapped and sleeved on the pull rod along the axial direction.
Preferably, a third limiting part is arranged on the outer peripheral surface of the pull rod at a position close to the clamping head, a second threaded hole is formed in the return nut, the pull rod is in threaded connection with the second threaded hole, and the return nut is attached to the third limiting part.
The invention also provides an electric spindle, which comprises a spindle core assembly, wherein the spindle core assembly comprises a spindle core, a pull rod, a chuck and a positioning structure; the shaft core is provided with a shaft hole which is penetrated along the axial direction, the free end of the shaft core is provided with a clamping section for clamping a cutter, and the clamping section is provided with a through hole which extends along the radial direction of the cross section of the shaft core and penetrates through the shaft core; the pull rod is sleeved in the shaft hole; the clamping head is arranged in the shaft hole of the clamping section, one end of the clamping head is connected with the pull rod, the other end of the clamping head is provided with a clamping hole which is coaxial with the shaft hole and used for the cutting tool to extend into for fixing, and the outer peripheral surface of the clamping head is provided with two symmetrical limiting grooves which are communicated with the clamping hole; the positioning structure comprises a positioning pin and a fixing piece, the positioning pin penetrates from one end of the through hole, and the locating pin penetrates through the limiting groove and the clamping hole in sequence and then penetrates out of the other end of the through hole, and the fixing piece penetrates into the shaft core to lock and fix the locating pin.
In the technical scheme of the invention, in the actual use process of the electric spindle, the clamping head is firstly opened when the tool is replaced each time, the clamping head rotates until the limiting groove is opposite to the through hole, then the locating pin penetrates from one end of the through hole, penetrates through the limiting groove and the clamping hole in sequence and then penetrates out of the other end of the through hole, then the tool is arranged in the clamping hole, the tail part of the clamping hole is tightly propped against the locating pin, the clamping head is furled to clamp the tool, and the fixing piece penetrates the shaft core to lock and fix the locating pin, at the moment, the tool is clamped by the clamping head, and the clamping head is in limiting and fixed connection with the shaft core through the limiting groove and the locking locating pin, so that the axial locating function of the tool can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of an embodiment of a mandrel assembly according to the present invention;
FIG. 2 is an enlarged schematic view of FIG. 1 at A;
fig. 3 is an enlarged schematic view at B in fig. 1.
Reference numerals illustrate:
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The invention provides a shaft core assembly.
Referring to fig. 1-3, in one embodiment of the present invention, the spindle assembly is mainly used for high-speed electric spindles (not shown), although other types of electric spindles that require clamping tools are applicable. The shaft core assembly comprises a shaft core 1, a pull rod 2, a chuck 3 and a positioning structure 4; the shaft core 1 is provided with a shaft hole 11 which is penetrated along the axial direction, the free end of the shaft core 1 is provided with a clamping section 12 for clamping a cutter, and the clamping section 12 is provided with a through hole 121 which extends along the radial direction of the cross section of the shaft core 1 and penetrates through the shaft core 1; the pull rod 2 is sleeved in the shaft hole 11; the clamping head 3 is arranged in the shaft hole 11 of the clamping section 12, one end of the clamping head 3 is connected with the pull rod 2, the other end of the clamping head is provided with a clamping hole 31 which is coaxial with the shaft hole 11 and used for the tool to extend into and be fixed, and the outer peripheral surface of the clamping head 3 is provided with two symmetrical limiting grooves 32 which are communicated with the clamping hole 31; the positioning structure 4 comprises a positioning pin 41 and a fixing piece 42, wherein the positioning pin 41 penetrates from one end of the through hole 121, penetrates through the other end of the through hole 121 after sequentially penetrating through the limiting groove 32 and the clamping hole 31, and the fixing piece 42 penetrates into the shaft core 1 to lock and fix the positioning pin 41.
It should be noted that, the electric spindle has the advantages of compact structure, small inertia, low noise, quick response, high rotation speed, high power, simplified machine tool design, easy realization of spindle positioning, etc., so that the electric spindle is a commonly used preferred structure in high-speed spindle units. In general, an electric spindle is composed of a shell-less motor (not shown), a spindle (not shown), a bearing (not shown), a spindle unit case (not shown), a drive module (not shown), a cooling device (not shown), and the like. In the practical structure of the motorized spindle, the rotor of the motor is integrated with the spindle, which is supported by the front and rear bearings; the stator of the motor is arranged in the shell of the main shaft unit through a cooling sleeve; the speed change of the main shaft is controlled by a main shaft driving module, and the temperature rise in the main shaft unit is limited by a cooling device; in addition, a tachometer, angular displacement sensor (not shown) is typically mounted at the rear end of the spindle, while a hole is typically provided in the front end for mounting the tool. In this embodiment, the present spindle assembly is an important component provided in the spindle core, and if the spindle core is forward in the direction toward the object to be processed, the front end of the spindle 1 is the clamping section 12, and the shaft hole 11 at the clamping section 12 can be used for mounting a tool.
In this embodiment, during the actual use of the spindle, each time the tool is replaced, the chuck 3 is first opened, the chuck 3 rotates until the limit groove 32 is aligned with the through hole 121, then the positioning pin 41 penetrates from one end of the through hole 121, penetrates through the limit groove 32 and the clamping hole 31 in sequence, then penetrates out from the other end of the through hole 121, then the tool is placed into the clamping hole 31, the tail of the tool abuts against the positioning pin 41, the chuck 3 is folded to clamp the tool, and use mounting 42 to penetrate axle core 1 in order to lock fixed locating pin 41, at this moment, because the cutter is pressed from both sides tightly by chuck 3, and chuck 3 realizes spacing fixed connection with axle core 1 through spacing groove 32 and locking locating pin 41 to can realize the axial positioning function of cutter, so, compare in the current common electric main shaft that is not provided with the axial positioning function of cutter, just can realize higher repetition accuracy at the tool changing in-process, and need not to pair the tool again, and then promoted machining efficiency. Of course, at present, a small part of electric main shafts can realize axial positioning of the cutters through the cooperation of the external cutter handles, but each cutter needs to be clamped by the corresponding cutter handle in the mode, so that the structure is complex, the use cost is high, and the clamping precision is low. However, in the technical scheme of the embodiment, the spindle assembly with the cutter axial positioning structure 4 can directly clamp the cutter without arranging an external cutter handle for matching, so that the high precision and the high efficiency of the electric spindle in the process of installing the cutter can be realized, and the product cost is effectively reduced.
Referring to fig. 1 and 3, in the present embodiment, further, the clamping section 12 of the shaft hole 11 is tapered to be tapered outwardly. It can be understood that, because the clamping head 3 connected with the pull rod 2 is arranged in the clamping section 12 of the shaft hole 11, when the clamping head 3 is pulled by the pull rod 2, the conical arrangement of the front end of the shaft hole 11 can reduce the obstruction of the loosening or folding action of the clamping head 3, and is also beneficial to the installation of a cutter.
As shown in fig. 2, in this embodiment, further, the clamping hole 31 is preferably provided through both ends of the chuck 3, and a thread (not shown) is provided in the clamping hole 31, and the pull rod 2 is screwed with the clamping hole 31. However, the present design is not limited thereto, and in other embodiments, the chuck 3 and the pull rod 2 may be connected by other means, such as but not limited to, clamping or protruding a threaded post on the top end of the chuck 3, and screwing with a threaded inner hole provided on the lower end of the pull rod 2. In the present embodiment, however, in the present embodiment, can be screwed with the pull rod 2 through the internal thread of the clamping hole 31 the connection between the two is firm and convenient.
Further, an annular groove 33 is provided on the outer peripheral surface of the chuck 3, a seal ring 34 is provided in the annular groove 33, and the seal ring 34 elastically abuts against the inner wall surface of the shaft hole 11. Here, the seal ring 34 may be a seal ring 34 made of a rubber ring or other elastic material such as a silicone ring. It will be appreciated that the sealing ring 34 may be configured to provide a sealing connection between the outer surface of the chuck 3 and the inner wall surface of the shaft hole 11, which is beneficial to improving the overall sealing performance of the shaft core assembly.
In this embodiment, the limiting groove 32 is preferably a kidney-shaped groove, and the groove width of the kidney-shaped groove is tapered along the direction from the outer surface of the chuck 3 to the clamping hole 31, so that the positioning pin 41 is facilitated to be smoothly inserted. In addition, the two limiting grooves 32 are symmetrically distributed in the left-right direction of fig. 1, that is, the connecting line between the groove bottom center of the two limiting grooves 32 and the hole center of the clamping hole 31 should coincide with the axis of the positioning pin 41.
Referring to fig. 1 and 3, in the present embodiment, specifically, the clamping section 12 is provided with a first threaded hole 122 penetrating from the outer surface of the mandrel 1 to the through hole 121, and the first threaded hole 122 is preferably disposed obliquely inward from the cross section of the mandrel 1. The fixing member 42 may be a machine screw that does not protrude from the hole of the first threaded hole 122, however, in other embodiments, the fixing member 42 may be a common screw with a length slightly longer than that of the first threaded hole 122, but in this embodiment, the machine screw is more attractive and convenient for assembly. After the positioning pin 41 is inserted into the through hole 121 to a predetermined position, the fixing member 42 may be screwed into the screw hole to lock and fix the positioning pin 41, so as to prevent the positioning pin 41 from being released. Here, after the positioning pin 41 is inserted into the through hole 121, it should be ensured that both ends thereof do not protrude from the outer circumferential surface of the shaft core 1 so as not to affect the beauty and the operation of the shaft core 1.
Further, referring to fig. 1 to 3, in the present embodiment, the mandrel assembly further includes an elastic member 5 and a return nut 6, the outer peripheral surface of the pull rod 2 is provided with a first limiting portion 21 at a position away from the collet 3, and one end of the pull rod 2 adjacent to the collet 3 is connected with the return nut 6; the hole wall surface of the shaft hole 11 is provided with a second limiting part 111 at a position far away from the chuck 3, the second limiting part 111 is positioned between the first limiting part 21 and the return nut 6, the elastic piece 5 is sleeved on the pull rod 2, and two ends of the elastic piece are respectively elastically abutted with the first limiting part 21 and the second limiting part 111. And as shown in fig. 2, the elastic member 5 may be preferably a belleville spring, and a plurality of belleville springs are overlapped and sleeved on the pull rod 2 along the axial direction. Further, the outer peripheral surface of the pull rod 2 is provided with a third limiting part 22 at a position close to the chuck 3, the return nut 6 is provided with a second threaded hole (not labeled), the pull rod 2 is in threaded connection with the second threaded hole, and the return nut 6 is attached to the third limiting part 22, so that the disc spring can be pre-tightened, the disc spring cannot be fully loosened in the tool changing process, and therefore, relative circumferential sliding cannot occur between the disc springs, and therefore, the balance stability of the shaft core assembly is high, in other words, the shaft core assembly can be enabled to be better in the use process through the pre-tightening structure of the disc spring. Here, the first stopper 21 is a first step formed on the pull rod 2 so as to be narrowed in the axial direction toward the collet 3, the second stopper 111 is a second step formed on the shaft hole 11 so as to be narrowed in the axial direction toward the collet 3, and the third stopper 22 is a third step formed on the lower end of the pull rod 2 so as to be narrowed in the axial direction toward the collet 3, however, in other embodiments, the elastic member 5 may be a compression spring or the like, and the second stopper 111 may be a flange or the like protruding from the inner wall surface of the shaft hole 11. In the present embodiment, the outer peripheral surface of the return nut 6 is also provided with an annular groove, and a seal ring 34 is also provided in the annular groove.
In this embodiment, the specific assembly process of the present mandrel assembly is as follows: firstly, a plurality of belleville springs are sleeved on a pull rod 2 in groups; then, the pull rod 2 with the mounted belleville spring is threaded into the shaft hole 11 of the shaft core 1 until the belleville spring is pressed against the second limiting part 111; then, the return nut 6 provided with the sealing ring 34 is arranged at the clamping section 12 of the shaft hole 11, and the tool is used for locking the return nut 6 and the pull rod 2 so as to ensure that the top surface of the return nut 6 is tightly attached to the step surface of the second limiting part 111 of the pull rod 2, thereby realizing the pretensioning action on the belleville spring; then, the clamping head 3 with the sealing ring 34 is arranged at the clamping section 12 of the shaft hole 11, and the clamping head 3 is locked on the pull rod 2 by an inner hexagonal wrench; then, the spanner is used to insert the spanner position of the pull rod 2 to rotate until the limit groove 32 is aligned with the through hole 121, namely, the positioning pin 41 is inserted into the through hole 121 until passing through the other end of the through hole 121; the machine screw is then screwed into the first threaded hole 122 until the locating pin 41 is locked in place. Each time the tool is replaced, the chuck 3 can be opened, the tool is installed in the clamping hole 31, the tail part of the tool abuts against the positioning pin 41, and then the chuck 3 is folded to clamp the tool, so that the axial positioning function of the tool is realized.
The invention also provides an electric spindle which comprises a spindle core assembly, and the specific structure of the spindle core assembly refers to the embodiment, and because the electric spindle adopts all the technical schemes of all the embodiments, the electric spindle at least has all the beneficial effects brought by the technical schemes of the embodiments, and the specific structure of the spindle core assembly is not repeated herein.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (9)
1. A spindle assembly for an electric spindle, comprising:
the shaft core is provided with a shaft hole which is penetrated along the axial direction, the free end of the shaft core is provided with a clamping section for clamping a cutter, and the clamping section is provided with a through hole which extends along the radial direction of the cross section of the shaft core and penetrates through the shaft core;
the pull rod is sleeved in the shaft hole;
the clamping head is arranged in the shaft hole of the clamping section, one end of the clamping head is connected with the pull rod, the other end of the clamping head is provided with a clamping hole which is coaxial with the shaft hole and used for the cutting tool to extend into for fixing, and the outer peripheral surface of the clamping head is provided with two symmetrical limiting grooves which are communicated with the clamping hole; the method comprises the steps of,
the positioning structure comprises a positioning pin and a fixing piece, wherein the positioning pin penetrates from one end of the through hole, penetrates through the limiting groove and the clamping hole in sequence and then penetrates out from the other end of the through hole, and the fixing piece penetrates into the shaft core to lock and fix the positioning pin;
the limiting groove is arranged as a kidney-shaped groove, and the groove width of the kidney-shaped groove is gradually reduced along the direction from the outer surface of the chuck to the clamping hole, so that the locating pin can smoothly penetrate through the limiting groove.
2. The mandrel assembly of claim 1, wherein the gripping section of the mandrel aperture is tapered outwardly.
3. The mandrel assembly of claim 2, wherein the clamping holes are formed through both ends of the chuck, threads are formed in the clamping holes, and the pull rod is in threaded connection with the clamping holes.
4. The mandrel assembly of claim 2, wherein the outer circumferential surface of the chuck is provided with an annular groove, and a sealing ring is arranged in the annular groove and elastically abuts against the inner wall surface of the shaft hole.
5. The mandrel assembly of claim 2, wherein the clamping section is provided with a first threaded hole penetrating from the outer surface of the mandrel to the through hole, and the fixing member is a machine screw and is screwed into the threaded hole to lock and fix the positioning pin.
6. The mandrel assembly according to any one of claims 1 to 5, further comprising an elastic member and a return nut, wherein a first limit portion is provided on an outer peripheral surface of the pull rod at a position away from the collet, and an end of the pull rod adjacent to the collet is connected to the return nut;
the hole wall surface of the shaft hole is provided with a second limiting part at a position far away from the chuck, and the second limiting part is positioned between the first limiting part and the return nut;
the elastic piece is sleeved on the pull rod, and two ends of the elastic piece are respectively elastically abutted with the first limiting part and the second limiting part.
7. The mandrel assembly of claim 6, wherein the elastic member is a belleville spring, and a plurality of belleville springs are axially overlapped and sleeved on the pull rod.
8. The mandrel assembly of claim 6, wherein a third limiting portion is provided on the outer circumferential surface of the pull rod at a position adjacent to the chuck, the return nut is provided with a second threaded hole, the pull rod is screwed with the second threaded hole, and the return nut is attached to the third limiting portion.
9. An electric spindle comprising a spindle core assembly according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711017551.9A CN109702228B (en) | 2017-10-25 | 2017-10-25 | Shaft core assembly and electric spindle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711017551.9A CN109702228B (en) | 2017-10-25 | 2017-10-25 | Shaft core assembly and electric spindle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109702228A CN109702228A (en) | 2019-05-03 |
| CN109702228B true CN109702228B (en) | 2023-12-29 |
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| CN201711017551.9A Active CN109702228B (en) | 2017-10-25 | 2017-10-25 | Shaft core assembly and electric spindle |
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| CN204381421U (en) * | 2014-12-26 | 2015-06-10 | 广州市昊志机电股份有限公司 | A kind of easy broaching tool of direct-connected main shaft |
| CN206065954U (en) * | 2016-08-31 | 2017-04-05 | 成都正恒动力股份有限公司 | A kind of adjustable auxiliary support device for positioning mechanical converted productss |
| CN107234252A (en) * | 2017-07-24 | 2017-10-10 | 东莞市科隆实业有限公司 | Fan blade balancing machine main shaft |
| CN207358182U (en) * | 2017-10-25 | 2018-05-15 | 深圳市速锋科技股份有限公司 | Axle core component and electro spindle |
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