Transition joint machining and positioning tool of high-speed and high-precision spindle motor

Abstract

The utility model relates to the technical field of motors, in particular to a transition joint processing and positioning tool of a high-speed high-precision spindle motor, which comprises a three-jaw chuck for clamping and positioning a transition joint, a rotating base and a positioning pressure plate, the three-jaw chuck is fixed on the rotating base, and the positioning pressure plate is fixed on the three-jaw chuck; the three-jaw chuck comprises a fixed base and a chuck body, the fixed base is fixed to the rotating base, the chuck body is fixed to the fixed base, a containing groove is formed in the middle of the chuck body, and a positioning threaded hole is formed in the containing groove; three clamping jaws are arranged on the chuck; the positioning pressing disc comprises a disc body, a Y-shaped positioning clamping groove is formed in the lower surface of the disc body, the width of the Y-shaped positioning clamping groove is equal to that of the clamping jaw, the Y-shaped positioning clamping groove corresponds to the clamping jaw in position, a plurality of positioning pins are arranged on the lower surface of the disc body in the circumferential direction, and a hole is formed in the middle of the disc body. The utility model relates to a transition joint processing and positioning tool of a high-speed and high-precision spindle motor, which can solve the technical problem of low processing efficiency of transition joint processing in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a transition section machining and positioning tool for a high-speed and high-precision spindle motor. Background Art

[0002] Since the transition section of the motor is a part located at the end of the motor and plays a transition connection role; in order to ensure a better connection and installation effect of the transition section, its circumferential end surface is generally milled. During the processing of the transition section of the existing motor, the feed route of the milling cutter is generally preset in advance to complete the milling of the four circumferential surfaces of the transition section.

[0003] However, the prior art has the following technical problems:

[0004] 1. In the prior art, the three-jaw chuck for installing the transition section is fixed, and the circumferential milling of the transition section is achieved by respectively presetting the feed routes of the four milling cutters. However, the inventors found that it is very time-consuming to adjust the feed routes of the four milling cutters before processing, which reduces the processing efficiency.

[0005] 2. When processing the transition joint in the prior art, it is generally fixed on a three-jaw chuck. However, the three-jaw chuck cannot quickly and accurately position the transition joint. The position of the transition joint can only be calibrated and adjusted continuously by CNC, and then the transition joint is completely locked and fixed with a three-jaw chuck, which is time-consuming and labor-intensive, and the processing efficiency is low. Utility Model Content

[0006] The utility model provides a transition section machining and positioning tool for a high-speed and high-precision spindle motor, which can solve the technical problem of low machining efficiency of the transition section in the prior art.

[0007] This application provides the following technical solutions:

[0008] A transition section processing and positioning tool for a high-speed and high-precision spindle motor comprises a three-jaw chuck for clamping and positioning the transition section, a rotating base and a positioning pressure plate, wherein the three-jaw chuck is fixed on the rotating base, and the positioning pressure plate is fixed on the three-jaw chuck;

[0009] The three-jaw chuck includes a fixed base and a chuck, wherein the fixed base is fixed on the rotating base, and the chuck is fixed on the fixed base. A receiving groove is provided in the middle of the chuck, and a positioning threaded hole is provided in the receiving groove; and three clamping claws are provided on the chuck;

[0010] The positioning pressure plate includes a plate body, a Y-shaped positioning slot is arranged on the lower surface of the plate body, the slot width of the Y-shaped positioning slot is equal to the width of the claw, the positions of the Y-shaped positioning slot and the claw correspond, a plurality of positioning pins are arranged circumferentially on the lower surface of the plate body, and a hole is opened in the middle of the plate body.

[0011] Beneficial effects:

[0012] 1. The rotating base can rotate, thereby changing the position of the three-jaw chuck fixed on the rotating base, and further changing the position of the transition section clamped by the three-jaw chuck. This setting allows the three-jaw chuck to rotate, so that when setting the milling cutter feed route, the feed and retract routes of the milling cutter can be set only on one surface. After the transition section processes one surface, the rotating base rotates a certain angle, and the milling cutter can re-feed according to the preset feed route, avoiding the increase in workload and reduced efficiency caused by setting four milling cutter feed routes separately.

[0013] 2. The three-jaw chuck includes a fixed base and a chuck. The fixed base can be fixed to the rotating base and center the position of the chuck, which is convenient for centering the transition section on the chuck during subsequent processing to ensure the processing quality; the receiving groove in the middle of the chuck can facilitate the feeding of the jaws, and the positioning threaded hole in the receiving groove can be used to fix the positioning pressure plate on the three-jaw chuck.

[0014] 3. The lower surface of the positioning pressure plate is provided with a Y-shaped positioning groove, which can be respectively inserted into three claws to position the positioning pressure plate. The lower surface of the positioning pressure plate is circumferentially provided with multiple positioning pins, which can be inserted into the transition section at the same time and quickly position the transition section, thereby saving the time required for CNC correction and alignment of the milling surface, and can effectively ensure the processing quality and improve the processing efficiency.

[0015] Furthermore, a centering column is arranged in the middle of the rotating base.

[0016] Furthermore, a centering hole is opened in the middle of the lower surface of the fixed base, and the centering hole matches the centering column.

[0017] Beneficial effect: The centering column and the centering hole cooperate to quickly center the fixed base, which is beneficial to improving the installation efficiency of the positioning chuck and can also assist in centering.

[0018] Furthermore, a plurality of strip-shaped through grooves and a plurality of through holes are formed on the upper surface of the rotating base, and the through holes are arranged in a circle.

[0019] Beneficial effects: The strip-shaped through grooves on the rotating base can easily accommodate waste materials from milling processing, and are also beneficial to the drainage of coolant during processing, making it easy to recover the coolant; the multiple through holes on the rotating base, which are arranged in a circle, can effectively fix the rotating base to the flange at the end of the motor shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a stereoscopic diagram of a first embodiment of a transition section machining and positioning tooling for a high-speed and high-precision spindle motor according to the utility model.

[0021] Figure 2 for Figure 1 Explosion diagram.

[0022] Figure 3 for Figure 1 Bottom view of the center positioning platen.

[0023] Figure 4 The utility model is a schematic diagram of a workpiece clamping device for machining and positioning a transition section of a high-speed and high-precision spindle motor according to the first embodiment of the present invention.

[0024] Figure 5 for Figure 4 Explosion diagram. DETAILED DESCRIPTION

[0025] The following is further described in detail through specific implementation methods:

[0026] The marks in the drawings of the specification include: rotating base 1, centering column 11, bar-shaped through groove 12, through hole 13, three-jaw chuck 2, fixed base 21, chuck 22, claw 221, accommodating groove 222, positioning pressure plate 3, Y-shaped positioning groove 31, positioning pin 32, long screw 33, transition section 4, positioning pin hole 41.

[0027] Embodiment 1

[0028] like Figure 1 , Figure 2 , Figure 3 As shown, a transition section processing and positioning tooling for a high-speed and high-precision spindle motor comprises a rotating base 1, a three-jaw chuck 2, and a positioning pressure plate 3 which are arranged in sequence from bottom to top. The three-jaw chuck 2 is fixedly connected to the rotating base 1, and the positioning pressure plate 3 is used to clamp and position the transition section 4, and the positioning pressure plate 3 can be clamped and fixed on the three-jaw chuck 2. The rotating base 1 is a square platform with chamfered corners. A plurality of strip-shaped through grooves 12 and a plurality of through holes 13 are opened on the upper surface of the rotating base 1. The through holes 13 are arranged in a circle, and a centering column 11 is arranged at the center of the upper surface of the rotating base 1. The through holes 13 are arranged circumferentially around the centering column 11, so as to facilitate the insertion of screws to fix the rotating base 1 on the flange at the end of the motor arranged below the rotating base 1, and ensure a better fixing effect while ensuring that the center of the rotating base 1 is aligned with the center of the motor shaft of the motor, so as to ensure that when the motor shaft rotates, the rotation angle of the rotating base 1 is consistent with the motor shaft to achieve the purpose of accurately controlling the rotation angle.

[0029] The three-jaw chuck 2 includes a fixed base 21 and a chuck 22 which are arranged in sequence from bottom to top. A blind hole is opened in the axial direction at the bottom center of the fixed base 21. For the convenience of distinction, this blind hole is named as a centering hole. The centering column 11 can be inserted into the centering hole to realize the centering of the fixed base 21. The fixed base 21 is fixed to the rotating base 1 by screws, and the chuck 22 is fixed to the fixed base 21 by welding. A blind hole is opened in the axial direction at the upper center of the chuck 22. For the convenience of distinction, this blind hole is named as a receiving groove 222. A positioning threaded hole is opened in the axial direction at the bottom center of the receiving groove 222. The positioning threaded hole is also a blind hole with an internal thread, and the positioning threaded hole is connected to the receiving groove 222; three sliding grooves are circumferentially arranged around the receiving groove 222 at the top of the chuck 22, and a clamping claw 221 is slidably arranged in the sliding groove; and the clamping claw 221 is slidably arranged in the sliding groove; and A plurality of teeth are arranged at the bottom of the claw 221, a large bevel gear is arranged in the chuck 22, a spiral groove is arranged on the upper surface of the large bevel gear, the spiral groove is meshed with the plurality of teeth at the bottom of the claw 221, the bevel teeth on the lower surface of the large bevel gear are meshed with the bevel teeth at one end of a plurality of small bevel gears arranged in the radial direction of the chuck 22, a square hole is arranged at the other end of the small bevel gear exposed from the circumferential outer wall of the chuck 22, a wrench can be inserted into the square hole to rotate the small bevel gear, the small bevel gear drives the large bevel gear, further making the three claws 221 perform centripetal motion or centrifugal motion at the same time.

[0030] The positioning pressure plate 3 includes a plate body, and a Y-shaped positioning slot 31 is welded in the middle of the lower surface of the plate body. The three ports of the Y-shaped positioning slot 31 are all open, and the slot width of the Y-shaped positioning slot 31 is equal to the width of the claw 221. The positions of the Y-shaped positioning slot 31 and the claw 221 correspond to each other, so that the Y-shaped positioning slot 31 can accurately clip the claw 221 set on the chuck 22 into the Y-shaped positioning slot 31, thereby quickly positioning the positioning pressure plate 3; and a plurality of positioning pins 32 are circumferentially arranged on the lower surface of the plate body, and the number and positions of the positioning pins 32 are set according to the number of positioning holes set on the transition section 4; a hole is opened in the middle of the plate body, and a long screw 33 passes through the hole, so that the plate body can be locked and fixed on the chuck 22.

[0031] Here’s how to use it:

[0032] Coarse positioning. Figure 4 , Figure 5 As shown, the transition section 4 is placed on the three-jaw chuck 2, and then the Y-shaped positioning slot 31 of the positioning pressure plate 3 is inserted into the three claws 221 from the vertical direction, so that the transition section 4 is located between the three-jaw chuck 2 and the positioning pressure plate 3, and the three claws 221 are used to press against the inner wall of the transition section to achieve rough positioning of the transition section 4.

[0033] Precise positioning. After the transition section 4 is manually rotated to a certain angle, the positioning pin 32 on the lower surface of the positioning platen 3 can be inserted into the positioning pin hole 41 provided on the upper surface of the transition section 4. The transition section 4 is quickly and accurately positioned by using the cooperation of the Y-shaped positioning slot 31, the claw 221, the positioning pin 32 and the positioning pin hole 41. Subsequently, the positioning platen 3 is locked and fixed on the three-jaw chuck 2 by using the long screw 33 to cooperate with the positioning threaded hole in the receiving slot 222. Thus, the transition section 4 is quickly positioned by using the positioning platen 3, which can save the time of CNC calibration and effectively improve the processing efficiency.

[0034] After the transition section 4 is fixed, a milling route of the milling cutter is set on a plane. After milling a plane, the motor shaft rotates, driving the rotating base 1 to rotate 90°, so that the next surface of the transition section 4 can be milled. Repeating the above operation, the four circumferential planes of the transition section 4 can be milled, and at the same time, the operation of setting four milling routes for four surfaces is saved, which effectively improves the processing efficiency.

[0035] The above is only an embodiment of the utility model. The utility model is not limited to the field involved in this implementation case. The common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A transition section processing and positioning tool for a high-speed and high-precision spindle motor, comprising a three-jaw chuck for clamping and positioning the transition section, characterized in that: It also includes a rotating base and a positioning pressure plate, the three-jaw chuck is fixed on the rotating base, and the positioning pressure plate is fixed on the three-jaw chuck; The three-jaw chuck comprises a fixed base and a chuck, wherein the fixed base is fixed on the rotating base, and the chuck is fixed on the fixed base. A receiving groove is provided in the middle of the chuck, and a positioning threaded hole is provided in the receiving groove; and three jaws are provided on the chuck; The positioning pressure plate includes a plate body, a Y-shaped positioning slot is arranged on the lower surface of the plate body, the slot width of the Y-shaped positioning slot is equal to the width of the claw, the positions of the Y-shaped positioning slot and the claw correspond, a plurality of positioning pins are arranged circumferentially on the lower surface of the plate body, and a hole is opened in the middle of the plate body.

2. The transition section machining and positioning tool for a high-speed and high-precision spindle motor according to claim 1 is characterized in that: A centering column is arranged in the middle of the rotating base.

3. The transition section machining and positioning tool for a high-speed and high-precision spindle motor according to claim 2 is characterized in that: A centering hole is provided in the middle of the lower surface of the fixed base, and the centering hole matches the centering column.

4. The transition section machining and positioning tool for a high-speed and high-precision spindle motor according to claim 1, characterized in that: The upper surface of the rotating base is provided with a plurality of strip-shaped through grooves and a plurality of through holes, and the through holes are arranged in a circle.

Images