CN119216666B - A motor shaft blank cutting device - Google Patents

Abstract

The invention relates to the technical field of sawing machines, and particularly discloses a motor shaft blank cutting device which comprises a frame, a sawing assembly, a positioning assembly and a clamping assembly, wherein a lifting mechanism is arranged between the sawing assembly and the frame, the positioning assembly comprises a positioning seat and positioning plates, the positioning seat is in sliding fit with the frame, two groups of positioning plate groups which are distributed at intervals are arranged on the positioning seat, each group of positioning plate groups is provided with a plurality of positioning plates which are distributed continuously up and down, a first groove is formed on the positioning plate, a first channel is formed among the first grooves, the clamping assembly comprises a lifting rod, a sliding rod, a clamping seat and a clamping roller, the lifting rod is in sliding fit on the positioning seat, one end of the sliding rod is in sliding fit with the lifting rod, the other end of the sliding rod is connected with the clamping seat, and the clamping roller is in rotating fit with the clamping seat, so that the distance between the clamping assembly and a motor shaft blank in the cutting process is kept unchanged, and the saw blade is prevented from deflecting in the cutting process.

Description

Motor shaft blank cutting device

Technical Field

The invention relates to the technical field of sawing machines, in particular to a motor shaft blank cutting device.

Background

The motor shaft is a cylindrical part extending from the motor and its housing, and is the main support and connection member for the armature part in the motor, and is also the output member for the power generated by the motor. The motor shaft is typically comprised of a shaft core, bearings and shaft seals.

In the motor shaft production process, a cylindrical steel casting is usually cut into the size required by a motor shaft by using a cutter, and the steel casting is usually cut by using a sawing machine in the process.

The Chinese patent application with the application publication number of CN113996865A discloses an automatic feeding horizontal metal band sawing machine, which comprises a base, wherein a sawing mechanism, a feeding mechanism, an auxiliary feeding mechanism, a clamping mechanism, a control console, a blanking groove and a lifting mechanism are arranged on the base, the lifting mechanism comprises a supporting column and a lifting cylinder, the sawing mechanism is arranged on the supporting column and drives the supporting column to lift through the lifting cylinder, the clamping mechanism is positioned at the front side of the feeding mechanism, the auxiliary feeding mechanism is positioned at the rear side of the feeding mechanism, and a saw blade guiding mechanism, a feed auxiliary mechanism and a tensioning mechanism are arranged on the sawing mechanism.

The automatic quantitative feeding and clamping are realized through the cooperation of the feeding mechanism and the clamping mechanism, the positioning is stable in the sawing process, the sawing mechanism drives the lifting cylinder to lift the sawing mechanism to automatically saw the material, the saw blade guiding mechanism provides stable guiding for the saw blade, and the mechanisms are mutually matched to realize the automatic feeding and sawing process of the metal band sawing machine.

However, when the shaft parts are cut, the positioning part can only be positioned at the diameter of the shaft parts, so that the saw blade guide part can only be positioned outside the diameter of the shaft parts, and when the shaft parts with small size are cut, the distance between the saw blade guide part and the shaft parts is overlarge, and the saw blade is easy to deflect during sawing.

Disclosure of Invention

The invention provides a motor shaft blank cutting device, which aims to solve the problem that saw blades are easy to deflect when small-size shaft parts are sawed in the related art.

The motor shaft blank cutting device comprises a frame, a sawing assembly, a positioning assembly and a clamping assembly;

a lifting mechanism is arranged between the sawing assembly and the frame;

The two positioning assemblies are symmetrically distributed on the frame, each positioning assembly comprises a positioning seat and a positioning plate, each positioning seat is in sliding fit with the frame, two positioning plate groups which are distributed at intervals are arranged on each positioning seat, each positioning plate group is provided with a plurality of positioning plates which are distributed continuously up and down, each positioning plate is in sliding fit with the corresponding positioning seat, each positioning plate is connected with each positioning seat through a first elastic piece, each positioning plate is provided with a first groove, and a plurality of first channels are formed between the corresponding first grooves;

Every be equipped with two symmetric distributions on the positioning seat clamping assembly, clamping assembly includes lifter, slide bar, grip slipper and grip slipper, lifter sliding fit is in on the positioning seat, the lifter pass through the second elastic component with the positioning seat is connected, the lifter is the telescopic link, the slide bar with lifter sliding fit, the one end of slide bar can sliding fit be in the first passageway, its other end with the grip slipper is connected, grip slipper normal running fit is in the grip slipper.

The saw blade cutting machine has the advantages that the motor shaft is arranged on the machine frame, the two positioning components are positioned on two sides of the motor shaft, the motor shaft is clamped and fixed through the elastic force of the first elastic piece, the contact surface of the positioning plate group and the motor shaft forms an arc-shaped groove with the same radian as the motor shaft, the first channel is further bent into a curve with the same radian as the motor shaft, the two clamping components on the same positioning seat are respectively positioned on two sides of the saw blade, the saw blade is clamped through the clamping rollers, in the cutting process, the sliding rod moves along the first channel, the distance between the clamping rollers and the motor shaft is kept unchanged, the clamping rollers are always close to the edge of the motor shaft, and the saw blade deflection caused by the fact that the distance between the clamping rollers and the motor shaft is increased in the cutting process is further prevented.

Preferably, the lifting rod is provided with a matching seat, the sliding rod is in sliding fit in the matching seat, and the clamping seat is connected with the matching seat through a third elastic piece.

The third elastic piece applies elastic force towards the saw blade direction to the clamping seat, so that the clamping roller is tightly attached to the saw blade, and the clamping roller is prevented from being separated from the saw blade.

Preferably, the sliding rod is provided with a plurality of self-locking grooves which are continuously distributed along the axial direction of the sliding rod, the matching seat is provided with a limiting block, the limiting block is rotationally connected with the matching seat through a torsion spring, and the limiting block can extend into the self-locking grooves, so that the limiting block can unidirectionally limit the sliding rod.

The limiting block is used for limiting the sliding rod in one direction, preventing the sliding rod from rebounding, and further preventing the saw blade from deflecting in the cutting process.

Preferably, each locating plate group top is provided with a mounting seat on the locating plate, a stop block is arranged on the mounting seat, the bottom end of the stop block can be stopped against the limiting block, and the stop block can push the limiting block to rotate, so that the limiting block releases the limiting of the sliding rod.

The self-locking groove is arranged on the sliding rod, and the stop block is arranged on the sliding rod.

Preferably, the sliding rod is provided with a wedge block, the bottom end of the mounting seat is provided with an inclined surface block, and the wedge block can move along the inclined surface block so as to drive the sliding rod to move along the axial direction of the sliding rod.

Preferably, the lifting rod is an elastic telescopic rod, the end part of the sliding rod is rotationally connected with a roller, the roller can roll in the first channel, and the diameter of the roller is smaller than the width of the first channel.

Preferably, a connecting plate is arranged between two adjacent positioning plates, two ends of the connecting plate are respectively hinged with the positioning plates, and the hinge point of the two connecting plates is positioned at the end part of the side wall of the first groove.

The clamping mechanism has the advantages that the connecting plate is arranged, so that the sliding rod can be prevented from being clamped between the two positioning plates, and the clamping mechanism cannot move downwards along with the saw blade.

Preferably, a driving shaft and a driving member are arranged on the frame, the driving member is used for driving the driving shaft to rotate, a first thread and a second thread are arranged on the driving shaft, the first thread and the second thread are opposite in rotation direction, the two positioning seats are respectively matched with the first thread and the second thread, and the driving shaft can drive the two positioning seats to be close to or far away from each other.

Preferably, the clamping seat is further provided with a spray head, the spray head is communicated with an external water tank through a pipeline, and cutting fluid is contained in the external water tank.

The cutting tool has the advantages that the spray head continuously sprays cutting fluid in the cutting process, and the saw blade is prevented from being overheated.

Preferably, the saw cutting assembly comprises a saw cutting seat, a saw blade and a guide rod, the saw cutting seat is fixedly connected to the lifting mechanism, the saw blade is in sliding fit in the saw cutting seat, a driving mechanism is arranged in the saw cutting seat and used for driving the saw blade to slide, the top end of the guide rod is connected with the saw cutting seat, a guide wheel is arranged at the bottom end of the guide rod, the guide wheel is abutted to the saw blade, and the bottom end of the guide rod can be abutted to the lifting rod.

By adopting the technical scheme, the invention has the beneficial effects that:

according to the motor shaft blank cutting device disclosed by the invention, the motor shaft is arranged on the frame, the two positioning components are positioned on two sides of the motor shaft, the motor shaft is clamped and fixed through the elastic force of the first elastic piece, the contact surface of the positioning plate group and the motor shaft forms an arc-shaped groove with the same radian as that of the motor shaft, the first channel is further bent into a curve with the same radian as that of the motor shaft, the two clamping components on the same positioning seat are respectively positioned on two sides of the saw blade, and the saw blade is clamped through the clamping rollers, in the cutting process, the sliding rod moves along the first channel, so that the distance between the clamping rollers and the motor shaft is kept unchanged, the clamping rollers are always close to the edge of the motor shaft, and the saw blade deflection caused by the fact that the distance between the clamping rollers and the motor shaft is increased in the cutting process is prevented.

Drawings

Fig. 1 is a schematic structural view of a motor shaft blank cutting device according to an embodiment of the invention.

Fig. 2 is a schematic view of a sawing assembly according to an embodiment of the invention.

FIG. 3 is a schematic view of a positioning assembly according to an embodiment of the present invention.

Fig. 4 is a cross-sectional view of a positioning assembly of an embodiment of the present invention.

FIG. 5 is a schematic view of a lifter structure according to an embodiment of the present invention

Fig. 6 is a schematic view of a sliding rod structure according to an embodiment of the present invention.

Fig. 7 is a schematic view of the mating seat and the sliding rod of the embodiment of the present invention.

Fig. 8 is a schematic view of a mounting structure according to an embodiment of the present invention.

Reference numerals:

1. The device comprises a frame, 2, a sawing assembly, 21, a sawing seat, 22, a saw blade, 23, a guide rod, 24, a guide wheel, 3, a lifting mechanism, 4, a positioning assembly, 41, a positioning seat, 42, a positioning plate, 421, a first groove, 43, a first elastic piece, 5, a clamping assembly, 51, a lifting rod, 52, a second elastic piece, 53, a sliding rod, 531, a self-locking groove, 54, a clamping seat, 55, a clamping roller, 6, a matching seat, 7, a third elastic piece, 8, a limiting block, 9, a mounting seat, 91, a bevel block, 10, a stop block, 11, a wedge block, 12, a roller, 13, a connecting plate, 14, a spray head, 15, a driving shaft, 16 and a driving piece.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

As shown in fig. 1 to 8, the motor shaft blank cutting device of the invention comprises a frame 1, a sawing assembly 2, a positioning assembly 4 and a clamping assembly 5.

Specifically, as shown in fig. 1 and 2, the sawing assembly 2 is arranged above the frame 1, a lifting mechanism 3 is arranged between the sawing assembly 2 and the frame 1, the lifting mechanism 3 is a hydraulic cylinder, the hydraulic cylinder is fixedly connected with the frame 1, the output end of the hydraulic cylinder is connected with the sawing assembly 2, and the hydraulic cylinder is used for driving the sawing assembly 2 to move up and down. The sawing assembly 2 is sawing equipment in the conventional technology, and comprises a sawing seat 21, a saw blade 22 and a guide rod 23, wherein the sawing seat 21 is fixedly connected with a lifting mechanism 3, a driving mechanism is arranged in the sawing seat 21, the driving mechanism comprises a driving wheel, a driven wheel and a driving motor, the driving wheel and the driven wheel are all in running fit in the sawing seat 21, the driving wheel and the driven wheel are distributed at intervals, the driving motor is fixedly connected in the driving seat, the output end of the driving motor is fixedly connected with the driving wheel, the driving wheel is used for driving the driving wheel to rotate, the saw blade 22 is of an annular structure, two ends of the saw blade 22 are respectively sleeved on the driving wheel and the driven wheel, the saw blade 22 is respectively in friction fit with the driving wheel and the driven wheel, and the driving wheel can drive the saw blade 22 to rotate circularly. The top fixed connection of guide bar 23 is on saw cut seat 21, and its bottom is equipped with the guide way, and saw blade 22 sliding fit is in the guide way, and the bottom of guide bar 23 still is equipped with leading wheel 24, and a plurality of leading wheels 24 symmetric distribution are in the both sides of guide bar 23, and every leading wheel 24 all rotates the cooperation with guide bar 23, and can stop with the lateral wall of saw blade 22 and prop.

As shown in fig. 1, fig. 3 and fig. 4, two positioning components 4 are symmetrically distributed on the frame 1, each positioning component 4 comprises a positioning seat 41 and a positioning plate 42, each positioning seat 41 is in sliding fit with the frame 1, a driving shaft 15 and a driving piece 16 are arranged on the frame 1, each driving shaft 15 is in rotating fit on the frame 1, each driving piece 16 is a motor, each driving piece 16 is fixedly connected on the frame 1, the output end of each driving piece 16 is fixedly connected with each driving shaft 15, each driving piece 16 is used for driving each driving shaft 15 to rotate, a first thread and a second thread are arranged on each driving shaft 15, the rotation directions of the first thread and the second thread are opposite, each positioning seat 41 is respectively in matching with the first thread and the second thread, and when the driving shafts 15 rotate, the two positioning seats 41 can be driven to be close to or far away from each other. The positioning seat 41 is provided with two symmetrically distributed positioning plate groups, each group of positioning plate groups is provided with a plurality of positioning plates 42 which are continuously distributed along the up-down direction, the positioning plates 42 are elastically connected with the positioning seat 41 through first elastic pieces 43, the first elastic pieces 43 are springs, and the positioning plates 42 are in sliding fit with the positioning seat 41. The locating plate 42 is equipped with first groove 421 on the lateral wall, and first groove 421 is close to the outer end of locating plate 42, is equipped with connecting plate 13 between two locating plates 42 that are adjacent from top to bottom, and the both ends of connecting plate 13 are articulated with two locating plates 42 respectively, and the pin joint is located the tip of first groove 421 lateral wall, forms first passageway between a plurality of first grooves 421, and a plurality of connecting plates 13 end to end are stopped the lateral wall that forms first passageway.

As shown in fig. 3 to 7, two symmetrically distributed clamping assemblies 5 are disposed on each positioning seat 41, each clamping assembly 5 comprises a lifting rod 51, a sliding rod 53, a clamping seat 54 and a clamping roller 55, guide grooves extending along the up-down direction are disposed on the side walls of the positioning seats 41, guide pieces are disposed on the lifting rods 51 and are slidably matched in the guide grooves, the lifting rods 51 can move up and down, the lifting rods 51 are horizontally placed, the bottom ends of the lifting rods are elastically connected with the positioning seats 41 through second elastic pieces 52, and the second elastic pieces 52 are elastic columns. The lifter 51 is the elasticity telescopic link, and the tip of lifter 51 is equipped with cooperation seat 6, and cooperation seat 6 can follow the axial displacement of lifter 51, and slide bar 53 sliding fit is in cooperation seat 6, and slide bar 53's one end normal running fit has gyro wheel 12, and gyro wheel 12 is located the first passageway, and can roll along the lateral wall of first passageway. The clamping seat 54 is fixedly connected with the sliding rod 53, the clamping seat 54 is elastically connected with the matching seat 6 through a third elastic piece 7, the third elastic piece 7 is a spring, and the clamping roller 55 is in rotary fit on the clamping seat 54. The clamping seat 54 is also provided with a spray head 14, the spray head 14 is communicated with an external water tank through a flexible pipeline, and cutting fluid is contained in the external water tank.

As shown in fig. 4 to 8, the engaging seat 6 is rotationally engaged with the stopper 8, the stopper 8 is rotationally engaged with the engaging seat 6 through a torsion spring, the stopper 8 can swing in the engaging seat 6, a plurality of self-locking grooves 531 are provided on the side wall of the sliding rod 53 and continuously distributed along the axial direction thereof, and the stopper 8 can extend into the self-locking grooves 531, thereby unidirectionally limiting the sliding rod 53 and preventing the sliding rod 53 from approaching the positioning seat 41. The locating plate 42 at the top end of each locating plate group is provided with a mounting seat 9, the mounting seat 9 is provided with a stop block 10, and the stop block 10 can be stopped with the limiting block 8. The sliding rod 53 is further provided with the wedge block 11, the bottom end of the mounting seat 9 is further provided with the inclined surface block 91, the wedge block 11 can move along the inclined surface block 91, when the sliding rod 53 moves upwards, the wedge block 11 is gradually close to the inclined surface block 91 and is stopped against the inclined surface block 91, the wedge block 11 can move along the inclined surface of the inclined surface block 91, so that the clamping roller 55 is pushed to be separated from the saw blade 22, and the clamping assembly 5 still clamps the saw blade 22 when the sawing assembly 2 moves upwards, so that the saw blade 22 is damaged.

According to the motor shaft blank cutting device of the embodiment of the invention, in an initial state, the clamping mechanism is positioned at the top end of the positioning seat 41, at the moment, the limiting block 8 is stopped by the stop block 10, the torsion spring is stretched, the limiting block 8 is not contacted with the sliding rod 53, and the wedge block 11 is stopped by the inclined surface block 91. The motor shaft is placed on the frame 1, the driving shaft 15 is driven to rotate through the driving piece 16, the two positioning seats 41 are close to each other, the positioning seats 41 are gradually close to the motor shaft in the moving process, as the motor shaft is of a cylindrical structure, the positioning plates 42 at the same height as the circle center of the motor shaft are firstly contacted with the motor shaft, the positioning plates 42 at the upper side and the lower side of the motor shaft are gradually contacted with the motor shaft, the motor shaft pushes the corresponding positioning plates 42 to move relative to the positioning seats 41, the contact surface of the positioning plate group and the motor shaft forms an arc-shaped groove, the radian of the arc-shaped groove is the same as that of the motor shaft, the motor shaft pushes the corresponding positioning plates 42 to move relative to the positioning seats 41 while the corresponding first elastic piece 43 is stretched, the elastic force of the first elastic piece 43 applies pressure towards the motor shaft to the positioning plates 42, and the positioning plates 42 at the two sides of the motor shaft apply pressure towards the motor shaft to the motor shaft respectively, so that clamping and fixing of the motor shaft are realized. At this time, the first channel on the locating plate set is changed into an arc bend, and the radian of the arc bend is the same as that of the motor shaft.

The lifting mechanism 3 drives the sawing assembly 2 to move downwards, meanwhile, the driving mechanism drives the saw blade 22 to rotate circularly, the guide rod 23 is contacted with the lifting rod 51 before the saw blade 22 contacts the motor shaft, the guide rod 23 pushes the lifting rod 51 to move downwards synchronously with the sawing assembly 2, the lifting rod 51 drives the sliding rod 53 to move downwards, the roller 12 rolls in the first channel, the lifting rod 51 is always in a contracted state, and the roller 12 is pushed to stop with the side wall of the first channel, which is close to the motor shaft, all the time. When the wedge block 11 is separated from the inclined surface block 91, under the elastic force of the third elastic member 7, the clamping seat 54 approaches the saw blade 22 until the clamping roller 55 is abutted against the saw blade 22, and the two clamping assemblies 5 on the same positioning seat 41 are respectively positioned at two sides of the saw blade 22 and clamp the saw blade 22 through the corresponding clamping roller 55, so that the saw blade 22 is prevented from deflecting in the cutting process. The sliding rod 53 continues to move downwards, so that the limiting block 8 is separated from the stop block 10, the torsional spring releases elasticity and pushes the limiting block 8 to rotate in the matching seat 6, the limiting block 8 stretches into the self-locking groove 531, the limiting block 8 is used for limiting the sliding rod 53 in a unidirectional mode, and the sliding rod 53 is prevented from rebounding. The saw cutting assembly 2 continues to move downwards, the saw blade 22 is in contact with the motor shaft, and cutting operation is started, during cutting, the saw cutting assembly 2 slowly moves downwards, the distance between the clamping roller 55 and the side wall of the motor shaft is kept unchanged due to the fact that the roller 12 rolls along the first channel, the clamping roller 55 is always close to the edge of the motor shaft, and further the saw blade 22 is prevented from deflecting due to the fact that the distance between the clamping roller 55 and the motor shaft is increased during cutting. At the same time, the spray head 14 continuously sprays cutting fluid to the cutting position during the cutting process, so as to prevent the saw blade 22 from being overheated and damaging the saw blade 22.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are 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 the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (7)

1. A motor shaft blank cutting device comprising:

A frame;

the sawing assembly is provided with a lifting mechanism between the sawing assembly and the rack;

The positioning assembly is symmetrically distributed on the frame, the positioning assembly comprises a positioning seat and positioning plates, the positioning seat is in sliding fit with the frame, two groups of positioning plate groups which are distributed at intervals are arranged on the positioning seat, each group of positioning plate groups is provided with a plurality of positioning plates which are distributed continuously up and down, each positioning plate is in sliding fit with the positioning seat, the positioning plates are connected with the positioning seat through first elastic pieces, the plurality of positioning plates which are distributed continuously up and down are used for clamping and fixing a motor shaft blank, a first groove is arranged on the side wall of each positioning plate, the first groove is arranged close to the outer end of each positioning plate, and a first channel is formed between the plurality of first grooves;

The clamping assembly comprises lifting rods, sliding rods, clamping seats and clamping rollers, wherein the lifting rods are in sliding fit on the positioning seats, the lifting rods can move up and down, the lifting rods are horizontally placed, the lifting rods are connected with the positioning seats through second elastic pieces, the sliding rods are in sliding fit with the lifting rods, the lifting rods are elastic telescopic rods, one ends of the sliding rods are rotatably connected with rollers, the rollers can roll in the first channels, the diameter of the rollers is smaller than the width of the first channels, the other ends of the sliding rods are connected with the clamping seats, the clamping rollers are rotatably matched in the clamping seats, the lifting rods are always in a contracted state and are pushed to be always abutted against the side walls of a motor shaft blank close to the first channels, and the two clamping assemblies on the same positioning seat are respectively located on two sides of a saw blade and clamp the saw blade through the corresponding clamping rollers;

The end part of the lifting rod is provided with a matching seat, the matching seat can move along the axial direction of the lifting rod, the sliding rod is in sliding fit in the matching seat, and the clamping seat is connected with the matching seat through a third elastic piece;

Saw cut the subassembly including saw cut seat, saw blade and guide bar, saw cut seat fixed connection is in on the elevating system, saw blade sliding fit is in saw cut in the seat, two clamping components are located the both sides of saw blade respectively, saw cut and be equipped with actuating mechanism in the seat, actuating mechanism is used for the drive saw blade slides, the top of guide bar with saw cut the seat and be connected, its bottom is equipped with the leading wheel, the leading wheel with the saw blade ends and supports, the bottom of guide bar can with the elevating system ends and supports.

2. The motor shaft blank cutting device according to claim 1, wherein the sliding rod is provided with a plurality of self-locking grooves which are continuously distributed along the axial direction of the sliding rod, the matching seat is provided with a limiting block, the limiting block is rotationally connected with the matching seat through a torsion spring, and the limiting block can extend into the self-locking grooves, so that the limiting block can unidirectionally limit the sliding rod.

3. The motor shaft blank cutting device according to claim 2, wherein a mounting seat is arranged on the positioning plate at the top end of each positioning plate group, a stop block is arranged on the mounting seat, the bottom end of the stop block can be stopped against the stop block, and the stop block can push the stop block to rotate, so that the stop block releases the limit on the sliding rod.

4. A motor shaft blank cutting device according to claim 3, wherein the sliding rod is provided with a wedge block, the bottom end of the mounting seat is provided with a bevel block, and the wedge block can move along the bevel block so as to drive the sliding rod to move along the axial direction of the sliding rod.

5. The motor shaft blank cutting device according to claim 1, wherein a connecting plate is arranged between two adjacent positioning plates, two ends of the connecting plate are respectively hinged with the positioning plates, and a hinge point of the connecting plate and the positioning plate is positioned at the end part of the side wall of the first groove.

6. The motor shaft blank cutting device according to claim 1, wherein a driving shaft and a driving member are arranged on the frame, the driving member is used for driving the driving shaft to rotate, a first thread and a second thread are arranged on the driving shaft, the first thread and the second thread are opposite in rotation direction, the two positioning seats are respectively matched with the first thread and the second thread, and the driving shaft can drive the two positioning seats to be close to or far away from each other.

7. The motor shaft blank cutting device according to claim 1, wherein the clamping seat is further provided with a spray head, the spray head is communicated with an external water tank through a pipeline, and cutting fluid is contained in the external water tank.