CN210702619U

CN210702619U - Simple correcting clamp for motor shell blanks

Info

Publication number: CN210702619U
Application number: CN201921052203.XU
Authority: CN
Inventors: 游学峰
Original assignee: Zhongxiang Xinyu Electrical Manufacturing Co ltd
Current assignee: Zhongxiang Xinyu Electrical Manufacturing Co ltd
Priority date: 2019-07-05
Filing date: 2019-07-05
Publication date: 2020-06-09
Anticipated expiration: 2029-07-05

Abstract

The utility model provides a motor shell class blank is with simple and easy correction anchor clamps, simple and easy correction anchor clamps include: the rotary worktable is rotatably arranged on the table frame along a vertical rotating shaft by 360 degrees, three excircle positioning seats are fixedly connected to the rotary worktable, the three excircle positioning seats are in triple rotational symmetry relative to the vertical rotating shaft, three positioning bolts are correspondingly in threaded connection with the three excircle positioning seats, and the heads of the three positioning bolts horizontally point to the vertical rotating shaft; the spiral pressing mechanisms are arranged on the rotary workbench at intervals and surround the vertical rotating shaft; and the correcting needle can be arranged above the table frame in a vertically sliding manner, and one end of the correcting needle faces one side of the rotary workbench. The utility model discloses the motor casing blank of multiple specification of correctability, the casing blank with the model only need rectify once, and the secondary clamping need not to rectify, makes simple, convenient to use, save time.

Description

Simple correcting clamp for motor shell blanks

Technical Field

The utility model relates to a motor shell class blank is with simply proofreaying and correct anchor clamps.

Background

When the rough machining of the general motor shell blank part is carried out, the rough machining needs to be manually corrected due to the limitation of the appearance of the motor shell, then the rough machining is carried out, but because the space position of the numerical control vertical lathe is limited, the direct manual correction of the motor shell blank on the lathe is very troublesome, the operation is inconvenient, the efficiency is not high, and in order to ensure the production, a simple correcting clamp of the motor shell blank needs to be designed.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a simple and easy correction anchor clamps of motor housing class blank for on numerical control vertical lathe makes its simple manufacture, convenient operation, save time.

The utility model adopts the technical proposal that: the utility model provides a simple and easy correction anchor clamps are used to motor shell class blank, motor shell class blank has a barrel, and the barrel is equipped with an inner bore coaxially, and the lower extreme hole enlargement of barrel forms an excircle, the simple and easy correction anchor clamps include:

the rotary worktable is rotatably arranged on the table frame along a vertical rotating shaft in an angle manner, three excircle positioning seats are fixedly connected to the rotary worktable, the three excircle positioning seats are in triple rotational symmetry relative to the vertical rotating shaft, three positioning bolts are in threaded connection with the three excircle positioning seats in a one-to-one correspondence manner, and the heads of the positioning bolts horizontally point to the vertical rotating shaft;

the spiral pressing mechanisms are used for pressing the upper end face of the outer circle downwards on the rotary workbench, and are arranged around the vertical rotating shaft at intervals on the rotary workbench;

and the correcting needle can be arranged above the table frame in a vertically sliding manner, and one end of the correcting needle faces one side of the rotary workbench.

Preferably, the simple correction clamp further comprises a positioning pin mechanism for circumferentially positioning the rotary workbench in a rotating manner relative to the table frame, the positioning pin mechanism is provided with a vertically arranged and resettable positioning pull pin, and the positioning pull pin can be movably arranged on the table frame up and down; when the positioning pull pin is in the reset position, the positioning pull pin penetrates through a pull pin hole formed in the rotary workbench in an upward positioning mode and then limits the rotary workbench to rotate.

Preferably, the positioning pin mechanism comprises a connecting pull rod and a connecting block besides the positioning pull pin, the upper end of the connecting pull rod is hinged to the lower end of the positioning pull pin, the lower end of the connecting pull rod is hinged to one end of the connecting block, the other end of the connecting block is rotatably arranged on the table frame, the connecting pull rod, the connecting block, the positioning pull pin and the table frame form a rocker slider mechanism, a rotating shaft pedal is fixedly connected with the connecting block, and the rotating shaft pedal is rotatably arranged on the table frame.

Preferably, the positioning pin mechanism further comprises a compression spring, a positioning pull pin seat, a pull pin seat cover, a connecting pull rod and a rotating shaft pedal support, the positioning pull pin seat is fixed on the table frame, the positioning pull pin can be movably inserted into the positioning pull pin seat from top to bottom, the lower end of the positioning pull pin penetrates through the pull pin seat cover, the pull pin seat cover is fixedly connected with the lower end of the positioning pull pin seat, the lower end of the compression spring is abutted to the positioning pull pin seat, and the upper end of the compression spring is abutted to a positioning convex ring protruding on the side wall of the positioning pull pin.

Preferably, the simple correction clamp further comprises a correction slide rod, a jacking screw and a locking guide slide block, the correction slide rod is vertically arranged, the lower end of the correction slide rod is fixedly connected with the table frame, the locking guide slide block is arranged on the correction slide rod in a vertically sliding manner, the jacking screw is in threaded connection with the locking guide slide block, the head of the jacking screw is vertically jacked on the correction slide rod, and the correction pin is arranged on the locking guide slide block.

Preferably, the correcting needle penetrates through the locking guide sliding block, the other tightening screw is in threaded connection with the locking guide sliding block, and the head of the tightening screw is vertically pressed on the correcting needle.

Preferably, simple and easy correction is pressed from both sides and is still included a rotary device, rotary device includes a rotational positioning axle, and the vertical setting of rotational positioning axle and its lower extreme rotationally set up in table frame upper end through the bearing, and the upper end of rotational positioning axle is fixed with a connecting plate perpendicularly, and the connecting plate upper end is equipped with a location tang, and a centre bore has been seted up coaxially to the center department of swivel work head, and swivel work head falls to put on the connecting plate and swivel work head's centre bore and location tang clearance fit.

Preferably, one end of the correcting needle facing the rotary table is a needle point, and the needle point is inclined downwards.

Preferably, the screw pressing mechanism comprises a first bolt, a second bolt, a pressing nut and a pressing plate; the first bolt and the second bolt are both vertically arranged, a vertical through hole is formed in the middle of the pressing plate, and a vertical threaded hole is formed in one end, opposite to the radial outer side of the rotary workbench, of the pressing plate; the lower end of the first bolt is fixedly connected with the rotary workbench, and the upper end of the first bolt is upwards penetrated through a through hole and then is in threaded connection with the compression nut; the lower extreme of second bolt rotationally sets up on swivel work head, and its lower extreme is reciprocated by the swivel work head restriction, and the upper end of second bolt is worn to establish the screw hole of clamp plate up and with the screw hole threaded connection of clamp plate, and the radial inboard one end of clamp plate supports down on the up end of the excircle of motor housing class blank.

The utility model has the advantages of it is following: the same type of shell blank only needs to be corrected once, and the motor shell blank does not need to be corrected when being clamped for the second time, so that the motor shell blank is simple to manufacture, convenient to use and time-saving.

Drawings

Fig. 1 is a plan view of a motor casing blank according to the present invention;

fig. 2 is a front view of a simple aligning fixture and a motor case blank according to a preferred embodiment of the present invention;

fig. 3 is a top view of a simple aligning fixture and a motor casing blank according to a preferred embodiment of the present invention;

fig. 4 is a side view of a locating pin mechanism in accordance with a preferred embodiment of the present invention;

fig. 5 is a front view of a rotating device according to a preferred embodiment of the present invention.

Detailed Description

The technical solution of the present invention will be clearly and completely described with reference to the accompanying drawings. In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present invention will be further explained with reference to the accompanying drawings.

Referring to fig. 1, the simple correcting fixture of the present invention is used for rough machining of motor casing blanks. The rough machining of the motor shell blank comprises a cylinder body 01, an inner hole is coaxially formed in the cylinder body 01, and one end of the cylinder body 01 is integrally and vertically connected with an upper end face 02 of an outer circle.

Please refer to fig. 2 and fig. 3 in combination. The utility model discloses a simply rectify anchor clamps, it includes table frame 1, swivel work head 4, inspection pin 6 and a plurality of spiral hold-down mechanism 11. Wherein, the rotary worktable 4 is horizontally arranged and can be arranged on the table frame 1 along a vertical rotating shaft in a 360-degree rotating way. Three excircle positioning seats 9 are fixedly connected to the rotary worktable 4. The three cylindrical positioning seats 9 are in triple rotational symmetry with respect to the vertical axis. The three positioning bolts 10 are in one-to-one correspondence with the three outer circle positioning seats 9, and the heads of the positioning bolts 10 horizontally point to the vertical rotating shaft.

The plurality of screw pressing mechanisms 11 are arranged on the rotary table 4 around the vertical rotating shaft at intervals, and are used for pressing the upper end surface 02 of the outer circle downwards onto the rotary table 4. The correction pin 6 is slidably provided up and down above the table frame 1. One end of the correcting pin 6 faces the rotary table 4 side. Wherein, a plurality of spiral hold-down mechanism 11 can be three or more, and it staggers in the circumference of swivel work head 4 with three excircle positioning seat 9.

When the simple correcting clamp of the embodiment is used, the motor shell blank is dropped on the rotary worktable 4, and the correcting pin 5 is adjusted to enable one end of the correcting pin to be approximately close to a position on the upper edge of the inner hole of the motor shell blank. When the rotating table 4 is manually rotated, the motor shell blank rotates along with the rotating table, and a rotation contour line of an inner hole of the motor shell blank generally generates certain deviation in the radial direction with a close point of one end of the correcting needle 5 (the coaxiality of the inner hole of the motor shell blank and the rotating table is poor). At this time, the positioning bolt 10 for adjusting the excircle positioning seat 9 abuts against the outer wall of the cylinder of the motor shell blank, so that the motor shell blank is coaxially corrected on the rotary worktable 4, and when the radial deviation is adjusted to be stable (observed by an operator through naked eyes), the coaxiality of the motor shell blank and the rotary worktable 4 which is equivalent to each other can be confirmed. The upper end face 02 of the outer circle is then pressed downward against the rotary table 4 by the screw pressing mechanism 11. And then the rotating workbench 4 and the motor shell blank are unloaded together, and are hung on the workbench of the lathe to be compressed again, so that the positioning and clamping of the motor shell blank are completed.

When the next motor shell blank needs to be clamped, one positioning bolt 10 is loosened, the previous motor shell blank is detached from the rotary workbench, and the next motor shell blank is installed on the rotary workbench 4. And locking the positioning bolt of the retreating plate to ensure that the positioning bolt and the other two positioning bolts position and lock the next motor shell blank on the rotary worktable. Because the relative positions of the three positioning bolts are unchanged, the coaxiality of the front and rear motor shell blanks relative to the rotary worktable and the worktable of the lathe keeps better coaxiality.

The simple correcting clamp of the embodiment only needs to correct the shell blank of the same model once, does not need to correct the shell blank of the motor in the secondary clamping process, and is simple to manufacture, convenient to use and time-saving.

In other embodiments, in order to prevent the motor shell blank phase from rotating with the rotary table 4 when the screw pressing mechanism 11 is locked, thereby affecting the operation of the operator, the simple correcting fixture may further include a positioning pin mechanism 2 for circumferentially positioning the rotary table 4 with respect to the table frame 1.

Referring to fig. 4, the positioning pin mechanism 2 has a positioning pull pin 21 that is vertically disposed and can be reset, and the positioning pull pin 21 is movably disposed on the table frame 1 up and down. When the positioning pull pin 21 is in the reset position, the positioning pull pin 21 is positioned upwards to penetrate through a pull pin hole formed in the rotary workbench 4, and then the rotary workbench 4 is limited to rotate.

In other embodiments, it is preferable that the positioning pin mechanism 2 further includes a connecting rod 25, a connecting block 26, and a pivot pedal 28 in addition to the positioning pull pin 21. The upper end of the connecting pull rod 25 is hinged with the lower end of the positioning pull pin 21. The lower end of the connecting pull rod 25 is hinged with one end of the connecting block 26. The other end of the connecting block 26 is rotatably arranged on the table frame 1. The connecting pull rod 25, the connecting block 26, the positioning pull pin 21 and the table frame 1 form a rocker-slider mechanism. The rotating shaft pedal 28 is fixedly connected with the connecting block 26.

Thus, when operating, the operator can control the pedal by foot to further control the positioning pull pin 21, so that both hands can be released for correction and pressing operation, and the operation is convenient.

Specifically, the positioning pin mechanism 2 further comprises a compression spring 22, a positioning pull pin seat 23, a pull pin seat cover 24 and a connecting pull rod 25. The positioning pull pin seat 23 is fixed on the table frame 1. The positioning pull pin 21 is inserted into the positioning pull pin seat 23 in a vertically movable manner. The lower end of the positioning pull pin 21 penetrates through the pull pin base cover 24. The pull pin base cover 24 is fixedly connected with the lower end of the positioning pull pin base 23. The lower end of the compression spring 22 abuts on the dowel seat 23. The upper end of the compression spring 22 abuts against a positioning convex ring protruding from the side wall of the positioning pull pin 21. Wherein, the rotating shaft pedal 28 is rotatably arranged on a rotating shaft pedal support 27, and the rotating shaft pedal support 27 is fixedly connected with the table frame 1.

Thus, when the operator steps on the pedal with his foot, the operator can perform the calibration operation, and releases the pedal after the calibration, the positioning pull pin 21 is driven by the restoring force of the compression spring 22 to upwardly penetrate through the pull pin hole of the rotary table 4, thereby restricting the rotation of the motor case blank along with the rotary table during the pressing operation. When the positioning pull pin 21 passes through the pull pin hole, the rotary worktable 4 cannot rotate, and the motor shell blank can be pressed tightly.

Specifically, in order to enable the correcting needle 6 to be arranged above the table frame 1 in a vertically sliding manner, the simple correcting clamp further comprises a correcting slide rod 5, a jacking screw 8 and a locking guide slide block 7. The correcting slide bar 5 is vertically arranged, the lower end of the correcting slide bar is fixedly connected with the table frame 1, the locking guide slide block 7 is arranged on the correcting slide bar 5 in a vertically sliding mode, the jacking screw 8 is in threaded connection with the locking guide slide block 7, and the head of the jacking screw is vertically jacked on the correcting slide bar 5. The correcting needle 6 is arranged on the locking guide slider 7.

In other embodiments, it is preferable that the calibration pin 6 is inserted through the locking guide slider 7, and another tightening screw 61 is screwed with the locking guide slider 7 and its head vertically presses against the calibration pin 6. In this way, the correction pin 6 can be moved relative to the locking guide slider 7, and the correction pin 6 can easily find the correction position during correction.

In other embodiments, it is preferable that the simple correction clamp further includes a rotation device 3. The rotating device 3 comprises a rotational positioning shaft 34. The rotary positioning shaft 34 is vertically arranged and the lower end thereof is rotatably arranged at the upper end of the table frame 1 through a bearing. A connection plate 31 is vertically fixed to an upper end of the rotational positioning shaft 34. The upper end of the connecting plate 31 is provided with a positioning spigot. A center hole is coaxially formed in the center of the rotary worktable 4, the rotary worktable 4 is placed on the connecting plate 31, and the center hole of the rotary worktable 4 is in clearance fit with the positioning spigot.

Wherein, the one end of the orientation direction swivel work head 4 of the utility model discloses a correction needle 6 is the needle point best, and the needle point inclines down. Therefore, the observation is more convenient when the correction is carried out.

Referring to fig. 5, the rotating device specifically includes a connecting plate 31, a supporting plate 32, a flat key 33, a rotating positioning shaft 34, an upper end cap 35, a deep groove ball bearing 36, a bearing seat 37, a spacer 38, a round nut 39, and a lower end cap 310. The bearing block 37 is fixed on the table frame 1 by bolts, the upper end cover 35 and the lower end cover 310 are fixed at the upper end and the lower end of the bearing block 37 in a one-to-one correspondence manner, and the two deep groove ball bearings 36 are arranged in the bearing block 37. The lower end of the rotary positioning shaft 34 can rotatably penetrate through the bearing seat 37 through two deep groove ball bearings 36, and the axial direction of the rotary positioning shaft 34 is vertically arranged. The spacer ring 38 is sleeved on the rotary positioning shaft 34 and separates the two axial deep groove ball bearings 36. The round nut 39 is arranged on the lower end face of the rotary positioning shaft 34 and axially limits the deep groove ball bearing 36. The lower end cap 310 covers the round nut 39. The connecting plate 31 and the supporting plate 32 are sleeved on the rotary positioning rotating shaft 34 through a flat key 33 in an axially slidable and circumferentially positioned manner, and the connecting plate 31 and the supporting plate 32 are fixedly connected through bolts. The rotary table 4 is placed on the connecting plate 31 through clearance fit with the positioning spigot of the connecting plate 31, and can rotate 360 degrees along the horizontal direction of the rotary positioning shaft.

In the present invention, the screw pressing mechanism includes a first bolt 111, a second bolt 113, a pressing nut 112, and a pressing plate 114. Wherein the first bolt 111 and the second bolt 113 are both vertically disposed. A vertical through hole is formed in the middle of the pressing plate 114, and a vertical threaded hole is formed in one end of the pressing plate 114, which is located radially outside the rotary table 4. The lower end of the first bolt 111 is fixedly connected with the rotary worktable 4, and the upper end thereof penetrates through the through hole upwards and then is in threaded connection with the compression nut 112. The lower end of the second bolt 113 is rotatably provided on the rotary table 4, and the lower end thereof is restricted by the rotary table from moving up and down. The upper end of the second bolt 113 upwards penetrates through the threaded hole of the pressure plate and is in threaded connection with the threaded hole of the pressure plate. One end of the radial inner side of the pressure plate 114 is pressed downwards against the upper end surface 02 of the outer circle of the motor shell blank. When motor shell blanks with the same height of the outer circles are compressed or loosened, only the compression nut needs to be adjusted; when changing into the motor shell class blank of another excircle height, the accessible rotates the whole height of adjusting the second bolt and then adjusting the clamp plate.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Other parts not described in detail in the present invention belong to the prior art, and are not described herein again.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a simple and easy correction anchor clamps are used to motor housing class blank, motor housing class blank has a barrel (01), is equipped with an hole coaxially in barrel (01), and the lower extreme hole enlargement of barrel (01) forms an excircle, its characterized in that, simple and easy correction anchor clamps include:

the rotary table comprises a table frame (1) and a rotary worktable (4) which is horizontally arranged, wherein the rotary worktable (4) is rotatably arranged on the table frame (1) along a vertical rotating shaft by 360 degrees, three excircle positioning seats (9) are fixedly connected to the rotary worktable (4), the three excircle positioning seats (9) are in triple rotational symmetry about the vertical rotating shaft, three positioning bolts (10) are in threaded connection with the three excircle positioning seats (9) in a one-to-one correspondence manner, and the heads of the positioning bolts horizontally point to the vertical rotating shaft;

the spiral pressing mechanisms (11) are used for pressing the upper end surface (02) of the outer circle downwards on the rotary workbench (4), and the spiral pressing mechanisms (11) are arranged on the rotary workbench (4) in a surrounding mode around the vertical rotating shaft at intervals;

and the correcting needle (6) is arranged above the table frame (1) in a vertically sliding manner, and one end of the correcting needle (6) faces one side of the rotary workbench (4).

2. The simple correcting clamp for the motor shell blank as recited in claim 1, further comprising a positioning pin mechanism (2) for circumferentially and rotationally positioning the rotary worktable (4) relative to the table frame (1), wherein the positioning pin mechanism (2) has a vertically arranged and resettable positioning pull pin (21), and the positioning pull pin (21) is movably arranged on the table frame (1) up and down; when the positioning pull pin (21) is in the reset position, the positioning pull pin (21) is upwards positioned to penetrate through a pull pin hole formed in the rotary workbench (4) and then the rotary workbench (4) is limited to rotate.

3. The simple correcting clamp for the motor shell blank as recited in claim 2, wherein the positioning pin mechanism (2) comprises a connecting pull rod (25) and a connecting block (26) in addition to the positioning pull pin (21), the upper end of the connecting pull rod (25) is hinged to the lower end of the positioning pull pin (21), the lower end of the connecting pull rod (25) is hinged to one end of the connecting block (26), the other end of the connecting block (26) is rotatably disposed on the table frame (1), the connecting pull rod (25), the connecting block (26), the positioning pull pin (21) and the table frame (1) form a rocker-slider mechanism, a rotating shaft pedal (28) is fixedly connected to the connecting block (26), and the rotating shaft pedal (28) is rotatably disposed on the table frame (1).

4. The simple correction fixture for the motor shell blank as recited in claim 3, wherein the positioning pin mechanism (2) further comprises a compression spring (22), a positioning pull pin seat (23), a pull pin seat cover (24), a connecting pull rod (25) and a rotating shaft pedal support (27), the positioning pull pin seat (23) is fixed on the table frame (1), the positioning pull pin (21) is movably inserted into the positioning pull pin seat (23) up and down, the lower end of the positioning pull pin (21) penetrates through the pull pin seat cover (24), the pull pin seat cover (24) is fixedly connected with the lower end of the positioning pull pin seat (23), the lower end of the compression spring (22) abuts against the positioning pull pin seat (23), and the upper end of the compression spring (22) abuts against a positioning convex ring protruding from a side wall of the positioning pull pin (21).

5. The simple correcting clamp for the motor shell blank as recited in claim 1, further comprising a correcting slide rod (5), a tightening screw and a locking guide slider (7), wherein the correcting slide rod (5) is vertically arranged, the lower end of the correcting slide rod is fixedly connected with the table frame (1), the locking guide slider (7) is vertically slidably arranged on the correcting slide rod (5), the tightening screw is in threaded connection with the locking guide slider (7), the head of the tightening screw vertically presses against the correcting slide rod (5), and the correcting needle (6) is arranged on the locking guide slider (7).

6. The simple correcting clamp for the motor shell blank as recited in claim 5, wherein the correcting pin (6) is inserted into the locking guide slider (7), and another tightening screw is in threaded connection with the locking guide slider (7) and the head of the tightening screw vertically presses against the correcting pin (6).

7. The simple correction clamp for the motor shell blank as recited in claim 1, wherein the simple correction clamp further comprises a rotating device (3), the rotating device (3) comprises a rotating positioning shaft (34), the rotating positioning shaft (34) is vertically arranged, the lower end of the rotating positioning shaft is rotatably arranged at the upper end of the table frame (1) through a bearing, a connecting plate (31) is vertically fixed at the upper end of the rotating positioning shaft (34), a positioning spigot is arranged at the upper end of the connecting plate (31), a central hole is coaxially arranged at the center of the rotating workbench (4), the rotating workbench (4) is placed on the connecting plate (31), and the central hole of the rotating workbench (4) is in clearance fit with the positioning spigot.

8. The simple correcting clamp for the motor shell blank as recited in claim 1, wherein the end of the correcting needle (6) facing the rotary table (4) is a needle point, and the needle point is inclined downwards.

9. The simple correcting clamp for the motor shell blank as recited in claim 1, wherein the screw pressing mechanism comprises a first bolt (111), a second bolt (113), a pressing nut (112) and a pressing plate (114); the first bolt (111) and the second bolt (113) are both vertically arranged, a vertical through hole is formed in the middle of the pressing plate (114), and a vertical threaded hole is formed in one end, opposite to the radial outer side of the rotary worktable (4), of the pressing plate (114); the lower end of the first bolt (111) is fixedly connected with the rotary workbench (4), and the upper end of the first bolt (111) penetrates through the through hole upwards and then is in threaded connection with the compression nut (112); the lower extreme of second bolt (113) rotationally sets up on swivel work head (4), and its lower extreme is reciprocated by swivel work head (4) restriction, and the upper end of second bolt (113) is worn to establish the screw hole of clamp plate (114) up and with the screw hole threaded connection of clamp plate (114), radial inboard one end of clamp plate (114) is supported down and is pressed on up end (02) of the excircle of motor housing class blank.