A motor shaft blank cutting device

Abstract

The present invention relates to the technical field of sawing machines, and specifically discloses a motor shaft blank cutting device, comprising: 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 positioning assembly comprises a positioning seat and a positioning plate. The positioning seat is slidably matched with the frame. Two groups of positioning plate groups distributed at intervals are arranged on the positioning seat. Each group of positioning plate groups has a plurality of positioning plates continuously distributed up and down. A first groove is arranged on the positioning plate, and a first channel is formed between the plurality of first grooves. The clamping assembly comprises a lifting rod, a sliding rod, a clamping seat and a clamping roller. The lifting rod is slidably matched with the positioning seat. The sliding rod is slidably matched with the lifting rod. One end of the sliding rod can be slidably matched in the first channel, and the other end thereof is connected to the clamping seat. The clamping roller is rotatably matched in the clamping seat. In the motor shaft blank cutting device of the present invention, the distance between the clamping assembly and the motor shaft blank remains unchanged during the cutting process, thereby preventing the saw blade from deflecting during the cutting process.

Description

Technical Field

[0001] The invention relates to the technical field of sawing machines, and in particular to a motor shaft blank cutting device. Background Art

[0002] The motor shaft is a cylindrical part extending from the motor and its housing. It is the main support and connection part of the armature part of the motor, and is also the output part of the power generated by the motor. The motor shaft is usually composed of a shaft core, bearings and shaft seals.

[0003] In the production and processing of motor shafts, a cutting machine is usually required to cut the cylindrical steel casting into the required size of the motor shaft. In this process, a sawing machine is usually used to cut the steel casting.

[0004] A Chinese patent application with application publication number CN113996865A discloses an automatic feeding horizontal metal band saw, which includes: a base, on which a sawing mechanism, a feeding mechanism, an auxiliary feeding mechanism, a clamping mechanism, a control console, a material drop chute and a lifting mechanism are arranged, the lifting mechanism includes a support column and a lifting cylinder, the sawing mechanism is arranged on the support column and is driven to rise and fall by the lifting cylinder, the clamping mechanism is located at the front side of the feeding mechanism, the auxiliary feeding mechanism is located at the rear side of the feeding mechanism, and the sawing mechanism is provided with a saw blade guide mechanism, a feed auxiliary mechanism and a tensioning mechanism.

[0005] The above patent application realizes automatic quantitative feeding and clamping through the cooperation of the feeding mechanism and the clamping mechanism. The positioning is stable during the sawing process. The sawing mechanism is driven by the lifting cylinder to automatically saw the material. The saw blade guide mechanism provides stable guidance for the saw blade. The various mechanisms cooperate with each other to realize the automatic feeding and sawing process of the metal band saw.

[0006] However, when cutting shaft parts, since the positioning part can only be positioned at the diameter of the shaft part, its saw blade guide part can only be positioned outside the diameter of the shaft part. When cutting small-sized shaft parts, the distance between the saw blade guide part and the shaft part will be too large, and the saw blade is prone to deflection during sawing. Summary of the invention

[0007] The invention provides a motor shaft blank cutting device, aiming to solve the problem in the related art that a saw blade is prone to deflection when sawing small-sized shaft parts.

[0008] The motor shaft blank cutting device of the present invention comprises: a frame, a sawing assembly, a positioning assembly and a clamping assembly;

[0009] A lifting mechanism is provided between the sawing assembly and the frame;

[0010] The two positioning assemblies are symmetrically distributed on the frame, and the positioning assembly includes a positioning seat and a positioning plate. The positioning seat is slidably matched with the frame. The positioning seat is provided with two groups of positioning plate groups distributed at intervals, and each group of positioning plate groups has a plurality of positioning plates continuously distributed up and down, and each positioning plate is slidably matched with the positioning seat. The positioning plate is connected to the positioning seat through a first elastic member, and a first groove is provided on the positioning plate, and a first channel is formed between the plurality of the first grooves;

[0011] Each positioning seat is provided with two symmetrically distributed clamping assemblies, and the clamping assembly includes a lifting rod, a sliding rod, a clamping seat and a clamping roller. The lifting rod is slidably fitted on the positioning seat, and the lifting rod is connected to the positioning seat through a second elastic member. The lifting rod is a telescopic rod, and the sliding rod is slidably fitted with the lifting rod. One end of the sliding rod can be slidably fitted in the first channel, and the other end thereof is connected to the clamping seat, and the clamping roller is rotatably fitted in the clamping seat.

[0012] Beneficial effects: the motor shaft is placed on the frame, the two positioning assemblies are located on both sides of the motor shaft, and the motor shaft is clamped and fixed by the elastic force of the first elastic member, the contact surface between the positioning plate group and the motor shaft forms an arc-shaped groove with the same curvature as the motor shaft, thereby bending the first channel into a curve with the same curvature as the motor shaft, and the two clamping assemblies on the same positioning seat are respectively located on both sides of the saw blade, and the saw blade is clamped by the clamping roller, and during the cutting process, the sliding rod moves along the first channel so that the distance between the clamping roller and the motor shaft remains unchanged, and the clamping roller is always close to the edge of the motor shaft, thereby preventing the saw blade from being skewed due to the increase in the distance between the clamping roller and the motor shaft during the cutting process.

[0013] Preferably, a matching seat is provided on the lifting rod, the sliding rod is slidably fitted in the matching seat, and the clamping seat is connected to the matching seat via a third elastic member.

[0014] The effect is that the third elastic member applies an elastic force to the clamping seat in the direction of the saw blade, so that the clamping roller is tightly attached to the saw blade, preventing the clamping roller from being out of contact with the saw blade.

[0015] Preferably, the sliding rod is provided with a plurality of self-locking grooves continuously distributed along its axial direction, and the mating seat is provided with a limit block, which is rotatably connected to the mating seat through a torsion spring, and the limit block can extend into the self-locking groove, so that the limit block can limit the sliding rod in one direction.

[0016] The effect is that the limit block limits the sliding rod in one direction, preventing the sliding rod from rebounding, and further preventing the saw blade from deflecting during the cutting process.

[0017] Preferably, a mounting seat is provided on the positioning plate at the top of each positioning plate group, and a stop block is provided on the mounting seat. The bottom end of the stop block can stop against the limit block, and the stop block can push the limit block to rotate, so that the limit block releases the limit on the sliding rod.

[0018] The effect is that the stopper can push the limit block out of the self-locking groove, thereby releasing the limit of the slide rod by the limit block, making it easier to reset the clamping assembly.

[0019] Preferably, a wedge block is provided on the sliding rod, and a slope block is provided at the bottom end of the mounting seat, and the wedge block can move along the slope block, thereby driving the sliding rod to move along its axial direction.

[0020] Preferably, the lifting rod is an elastic telescopic rod, the end of the sliding rod is rotatably connected to 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.

[0021] Preferably, a connecting plate is provided between two adjacent positioning plates, two ends of the connecting plate are respectively hinged to the positioning plates, and the hinge points of the two are located at the end of the side wall of the first groove.

[0022] The effect is that the connection plate can prevent the sliding rod from being stuck between the two positioning plates, which causes the clamping mechanism to be unable to move downward along with the saw blade.

[0023] Preferably, a driving shaft and a driving member are provided on the frame, and the driving member is used to drive the driving shaft to rotate. The driving shaft is provided with a first thread and a second thread, and the rotation directions of the first thread and the second thread are opposite. 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 move closer to or away from each other.

[0024] Preferably, the clamping seat is further provided with a nozzle, and the nozzle is connected to an external water tank through a pipeline, and the external water tank contains cutting fluid.

[0025] The effect is that the nozzle continuously sprays cutting fluid during the cutting process to prevent the saw blade from overheating.

[0026] Preferably, the sawing assembly includes a sawing seat, a saw blade and a guide rod, the sawing seat is fixedly connected to the lifting mechanism, the saw blade is slidably fitted in the sawing seat, a driving mechanism is provided in the sawing seat, the driving mechanism is used to drive the saw blade to slide, the top end of the guide rod is connected to the sawing seat, and the bottom end of the guide rod is provided with a guide wheel, the guide wheel is stopped against the saw blade, and the bottom end of the guide rod can be stopped against the lifting rod.

[0027] By adopting the above technical solution, the beneficial effects of the present invention are:

[0028] According to the motor shaft blank cutting device of the present invention, the motor shaft is placed on a frame, two positioning assemblies are located on both sides of the motor shaft, and the motor shaft is clamped and fixed by the elastic force of the first elastic member, and the contact surface between the positioning plate group and the motor shaft forms an arc-shaped groove with the same curvature as the motor shaft, thereby bending the first channel into a curve with the same curvature as the motor shaft, and the two clamping assemblies on the same positioning seat are respectively located on both sides of the saw blade, and the saw blade is clamped by a clamping roller. During the cutting process, the sliding rod moves along the first channel, so that the distance between the clamping roller and the motor shaft remains unchanged, and the clamping roller is always close to the edge of the motor shaft, thereby preventing the saw blade from being skewed due to the increase in the distance between the clamping roller and the motor shaft during the cutting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic structural diagram of a motor shaft blank cutting device according to an embodiment of the present invention.

[0030] Figure 2 It is a schematic diagram of the sawing assembly structure of an embodiment of the present invention.

[0031] Figure 3 It is a schematic diagram of the structure of the positioning component of an embodiment of the present invention.

[0032] Figure 4 4 is a cross-sectional view of a positioning assembly according to an embodiment of the present invention.

[0033] Figure 5 Schematic diagram of the lifting rod structure of an embodiment of the present invention

[0034] Figure 6 2 is a schematic diagram of the sliding rod structure of an embodiment of the present invention.

[0035] Figure 7 It is a schematic diagram of the cooperation between the cooperation seat and the sliding rod in an embodiment of the present invention.

[0036] Figure 8 2 is a schematic diagram of the mounting base structure of an embodiment of the present invention.

[0037] Reference numerals:

[0038] 1. Frame; 2. Sawing assembly; 21. Sawing seat; 22. Saw blade; 23. Guide rod; 24. Guide wheel; 3. Lifting mechanism; 4. Positioning assembly; 41. Positioning seat; 42. Positioning plate; 421. First groove; 43. First elastic member; 5. Clamping assembly; 51. Lifting rod; 52. Second elastic member; 53. Sliding rod; 531. Self-locking groove; 54. Clamping seat; 55. Clamping roller; 6. Matching seat; 7. Third elastic member; 8. Limiting block; 9. Mounting seat; 91. Inclined block; 10. Stop block; 11. Wedge block; 12. Roller; 13. Connecting plate; 14. Nozzle; 15. Drive shaft; 16. Drive member. DETAILED DESCRIPTION

[0039] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0040] like Figures 1 to 8 As shown, the motor shaft blank cutting device of the present invention comprises: a frame 1, a sawing assembly 2, a positioning assembly 4 and a clamping assembly 5.

[0041] Specifically, Figure 1 and Figure 2 As shown, the sawing assembly 2 is arranged above the frame 1, and a lifting mechanism 3 is arranged between the sawing assembly 2 and the frame 1. The lifting mechanism 3 is a hydraulic cylinder, which is fixedly connected to the frame 1, and its output end is connected to the sawing assembly 2. The hydraulic cylinder is used to drive the sawing assembly 2 to move up and down. The sawing assembly 2 is a sawing device in the conventional technology, which includes a sawing seat 21, a saw blade 22 and a guide rod 23. The sawing seat 21 is fixedly connected to the lifting mechanism 3. A driving mechanism is arranged in the sawing seat 21. The driving mechanism includes a driving wheel, a driven wheel and a driving motor. The driving wheel and the driven wheel are both rotatably matched in the sawing seat 21. The driving wheel and the driven wheel are spaced apart. The driving motor is fixedly connected in the driving seat, and its output end is fixedly connected to the driving wheel. It is used to drive the driving wheel to rotate. The saw blade 22 is an annular structure, and its two ends are respectively sleeved on the driving wheel and the driven wheel. The saw blade 22 is frictionally matched with the driving wheel and the driven wheel respectively. The rotation of the driving wheel can drive the saw blade 22 to rotate cyclically. The top end of the guide rod 23 is fixedly connected to the sawing seat 21, and the bottom end is provided with a guide groove, in which the saw blade 22 slides. A guide wheel 24 is also provided at the bottom of the guide rod 23. Multiple guide wheels 24 are symmetrically distributed on both sides of the guide rod 23. Each guide wheel 24 is rotatably matched with the guide rod 23 and can stop against the side wall of the saw blade 22.

[0042] like Figure 1 , Figure 3 and Figure 4As shown, two positioning components 4 are symmetrically distributed on the frame 1, and the positioning component 4 includes a positioning seat 41 and a positioning plate 42. The positioning seat 41 is slidably matched with the frame 1. The frame 1 is provided with a driving shaft 15 and a driving member 16. The driving shaft 15 is rotatably matched with the frame 1. The driving member 16 is a motor. The driving member 16 is fixedly connected to the frame 1, and its output end is fixedly connected to the driving shaft 15. The driving member 16 is used to drive the driving shaft 15 to rotate. The driving shaft 15 is provided with a first thread and a second thread. The first thread and the second thread have opposite rotation directions. The two positioning seats 41 are respectively matched with the first thread and the second thread. When the driving shaft 15 rotates, it can drive the two positioning seats 41 to move closer or farther from each other. The positioning seat 41 is provided with two symmetrically distributed positioning plate groups, and each positioning plate group has a plurality of positioning plates 42 continuously distributed in the up and down directions. The positioning plate 42 and the positioning seat 41 are elastically connected by a first elastic member 43, and the first elastic member 43 is a spring. The positioning plate 42 and the positioning seat 41 are slidably matched. A first groove 421 is provided on the side wall of the positioning plate 42, and the first groove 421 is close to the outer end of the positioning plate 42. A connecting plate 13 is provided between two adjacent positioning plates 42. Both ends of the connecting plate 13 are respectively hinged to the two positioning plates 42, and the hinge point is located at the end of the side wall of the first groove 421. A first channel is formed between the multiple first grooves 421, and the multiple connecting plates 13 are stopped at the head and tail to form the side wall of the first channel.

[0043] like Figures 3 to 7 As shown, each positioning seat 41 is provided with two symmetrically distributed clamping assemblies 5, and the clamping assembly 5 includes a lifting rod 51, a sliding rod 53, a clamping seat 54 and a clamping roller 55. A guide groove extending in the up-down direction is provided on the side wall of the positioning seat 41, and a guide member is provided on the lifting rod 51. The guide member slides in the guide groove, and the lifting rod 51 can move up and down. The lifting rod 51 is placed horizontally, and its bottom end is elastically connected to the positioning seat 41 through a second elastic member 52, and the second elastic member 52 is an elastic column. The lifting rod 51 is an elastic telescopic rod, and a matching seat 6 is provided at the end of the lifting rod 51. The matching seat 6 can move along the axial direction of the lifting rod 51. The sliding rod 53 slides in the matching seat 6, and one end of the sliding rod 53 is rotatably matched with a roller 12, and the roller 12 is located in the first channel and can roll along the side wall of the first channel. The clamping seat 54 is fixedly connected to the sliding rod 53, and the clamping seat 54 is elastically connected to the matching seat 6 through the third elastic member 7, and the third elastic member 7 is a spring. The clamping roller 55 is rotatably matched on the clamping seat 54. The clamping seat 54 is also provided with a nozzle 14, which is connected to an external water tank through a flexible pipeline, and the external water tank contains cutting fluid.

[0044] like Figures 4 to 8As shown, the limited block 8 is rotatably engaged in the matching seat 6, and the limited block 8 is rotatably engaged with the matching seat 6 through a torsion spring, and the limited block 8 can swing in the matching seat 6. The side wall of the sliding rod 53 is provided with a plurality of self-locking grooves 531 continuously distributed along its axial direction, and the limited block 8 can extend into the self-locking groove 531, thereby unidirectionally limiting the sliding rod 53 to prevent the sliding rod 53 from approaching the positioning seat 41. A mounting seat 9 is provided on the positioning plate 42 at the top of each group of positioning plate groups, and a stopper 10 is provided on the mounting seat 9, and the stopper 10 can stop against the limited block 8. A wedge block 11 is also provided on the sliding rod 53, and a slope block 91 is also provided at the bottom end of the mounting seat 9. The wedge block 11 can move along the slope block 91. When the sliding rod 53 moves upward, the wedge block 11 gradually approaches the slope block 91 and stops at the slope block 91. The wedge block 11 can move along the slope of the slope block 91, thereby pushing the clamping roller 55 out of the saw blade 22, preventing the clamping assembly 5 from still clamping the saw blade 22 when the sawing assembly 2 moves upward, causing damage to the saw blade 22.

[0045] According to the motor shaft blank cutting device of an embodiment of the present invention, in the initial state, the clamping mechanism is located at the top end of the positioning seat 41, at this time, the limit block 8 and the stop block 10 are stopped, the torsion spring is stretched, the limit block 8 does not contact the sliding rod 53, and the wedge block 11 and the inclined block 91 are stopped. The motor shaft is placed on the frame 1, and the driving shaft 15 is driven to rotate by the driving member 16, so that the two positioning seats 41 are close to each other, and the positioning seat 41 gradually approaches the motor shaft during the movement. Since the motor shaft is a cylindrical structure, the positioning plate 42 at the same height as the center of the motor shaft first contacts the motor shaft, and the positioning plates 42 on both sides gradually contact the motor shaft. The motor shaft pushes the corresponding positioning plate 42 to move relative to the positioning seat 41, so that the contact surface between the positioning plate group and the motor shaft forms an arc groove, and the arc of the arc groove is the same as the arc of the motor shaft. When the motor shaft pushes the corresponding positioning plate 42 to move relative to the positioning seat 41, the corresponding first elastic member 43 is stretched, and the elastic force of the first elastic member 43 applies pressure to the positioning plate 42 toward the motor shaft, and the positioning plates 42 on both sides of the motor shaft respectively apply pressure to the motor shaft toward the motor shaft, thereby clamping and fixing the motor shaft. At this time, the first channel on the positioning plate group is correspondingly changed into an arc curve, and the arc of the arc curve is the same as the arc of the motor shaft.

[0046] The lifting mechanism 3 drives the sawing assembly 2 to move downward, and the driving mechanism drives the saw blade 22 to rotate cyclically. Before the saw blade 22 contacts the motor shaft, the guide rod 23 will first contact the lifting rod 51. The guide rod 23 pushes the lifting rod 51 and the sawing assembly 2 to move downward synchronously. The lifting rod 51 drives the sliding rod 53 to move downward, and the roller 12 rolls in the first channel. The lifting rod 51 is always in a retracted state and pushes the roller 12 to always stop against the side wall of the first channel close to the motor shaft. When the wedge block 11 is separated from the inclined 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 stops against the saw blade 22. The two clamping assemblies 5 on the same positioning seat 41 are respectively located on both sides of the saw blade 22, and the saw blade 22 is clamped by the corresponding clamping roller 55 to prevent the saw blade 22 from deflecting during the cutting process. The sliding rod 53 continues to move downward, causing the limit block 8 to disengage from the stop block 10, the torsion spring releases its elastic force, and pushes the limit block 8 to rotate in the mating seat 6, causing the limit block 8 to extend into the self-locking groove 531. The limit block 8 unidirectionally limits the sliding rod 53 to prevent the sliding rod 53 from rebounding. The sawing assembly 2 continues to move downward, the saw blade 22 contacts the motor shaft, and the cutting operation begins. During the cutting process, the sawing assembly 2 moves downward slowly. As the roller 12 rolls along the first channel, the distance between the clamping roller 55 and the side wall of the motor shaft remains unchanged, and the clamping roller 55 is always close to the edge of the motor shaft, thereby preventing the distance between the clamping roller 55 and the motor shaft from increasing during the cutting process, causing the saw blade 22 to deflect. At the same time, during the cutting process, the nozzle 14 continues to spray cutting fluid to the cutting position to prevent the saw blade 22 from overheating and damaging the saw blade 22.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A motor shaft blank cutting device, comprising: frame; A sawing assembly, wherein a lifting mechanism is provided between the sawing assembly and the frame; The feature is that it also includes a positioning component, two of the positioning components are symmetrically distributed on the frame, the positioning component includes a positioning seat and a positioning plate, the positioning seat is slidably matched with the frame, two groups of positioning plate groups distributed at intervals are provided on the positioning seat, each group of positioning plate groups has a plurality of positioning plates continuously distributed up and down, each positioning plate is slidably matched with the positioning seat, the positioning plate and the positioning seat are connected by a first elastic member, and the plurality of positioning plates continuously distributed up and down are used to clamp and fix the motor shaft blank, a first groove is provided on the side wall of the positioning plate, the first groove is arranged near the outer end of the positioning plate, and a first channel is formed between the plurality of the first grooves; the two positioning seats can be close to or away from each other relative to the motor shaft blank; The lifting rod is connected with the positioning seat through a second elastic member, and the sliding rod is slidably matched with the lifting rod. The lifting rod is an elastic telescopic rod, and one end of the sliding rod is rotatably connected with a roller, and the roller can roll in the first channel, and the diameter of the roller is smaller than the width of the first channel. The other end of the sliding rod is connected with the clamping seat, and the clamping roller is rotatably matched in the clamping seat; the lifting rod is always in a retracted state, and pushes the roller to always stop against the side wall of the first channel close to the motor shaft blank. The two clamping assemblies on the same positioning seat are respectively located on both sides of the saw blade, and the saw blade is clamped by corresponding clamping rollers; A matching seat is provided at the end of the lifting rod, and the matching seat can move along the axial direction of the lifting rod, the sliding rod is slidably matched in the matching seat, and the clamping seat and the matching seat are connected by a third elastic member; The sawing assembly includes a sawing seat, a saw blade and a guide rod. The sawing seat is fixedly connected to the lifting mechanism, and the saw blade is slidably fitted in the sawing seat. Two clamping assemblies are respectively located on both sides of the saw blade. A driving mechanism is provided in the sawing seat, and the driving mechanism is used to drive the saw blade to slide. The top end of the guide rod is connected to the sawing seat, and a guide wheel is provided at the bottom end thereof. The guide wheel stops against the saw blade, and the bottom end of the guide rod can stop against the lifting rod.

2. The motor shaft blank cutting device according to claim 1, characterized in that: The sliding rod is provided with a plurality of self-locking grooves continuously distributed along its axial direction, and the matching seat is provided with a limit block, which is rotatably connected to the matching seat through a torsion spring, and the limit block can extend into the self-locking groove, so that the limit block can limit the sliding rod in one direction.

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

4. The motor shaft blank cutting device according to claim 3, characterized in that: The sliding rod is provided with a wedge block, and the bottom end of the mounting seat is provided with an inclined surface block. The wedge block can move along the inclined surface block, thereby driving the sliding rod to move along its axial direction.

5. The motor shaft blank cutting device according to claim 1, characterized in that: A connecting plate is provided between two adjacent positioning plates, and both ends of the connecting plate are respectively hinged to the positioning plates, and the hinge points of the two are located at the end of the side wall of the first groove.

6. The motor shaft blank cutting device according to claim 1, characterized in that: The frame is provided with a driving shaft and a driving member, the driving member is used to drive the driving shaft to rotate, the driving shaft is provided with a first thread and a second thread, the rotation direction of the first thread and the second thread are opposite, 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 move closer to or away from each other.

7. The motor shaft blank cutting device according to claim 1, characterized in that: The clamping seat is also provided with a nozzle, which is connected to an external water tank through a pipeline, and the external water tank contains cutting fluid.

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