Positioning tool for motor shaft machining

Abstract

The invention belongs to the technical field of positioning tools, and particularly relates to a positioning tool for motor shaft machining. Comprising a base, a chuck is installed on the base, the base is in sliding connection with an electric sliding frame through an electromagnetic sliding rail, the electric sliding frame is fixedly connected with a top column, the base is in sliding connection with a sliding block, the sliding block is fixedly connected with an electric control push rod, an elastic block is fixedly connected to a telescopic part of the electric control push rod, and the elastic block is fixedly connected with a supporting plate. The telescopic part of the electric control push rod and the elastic block are used for actively and passively adjusting the height of the supporting plate correspondingly, and the supporting plate is used for supporting the motor shaft so as to resist the radial force borne by the motor shaft in the machining process and perpendicular to the axis of the motor shaft. The turning position of the motor shaft is supported through the supporting plate, so that the probability that the chuck is loosened and the motor shaft is deformed due to the fact that the motor shaft is pressed in the turning process is reduced, the turning stability of the motor shaft is guaranteed, and the machining quality of the motor shaft is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of positioning tooling, especially to a positioning tooling for motor shaft machining. BACKGROUND

[0002] The motor shaft is the core transmission component of the motor, and its machining precision, especially the coaxiality and other form and position tolerances, will directly affect the stability of the motor operation. In the turning machining process of the motor shaft, the existing positioning tooling usually clamps one end of the motor shaft by the chuck, and the other end of the motor shaft is tightly pressed by the tailstock pin. However, we found that this positioning method has the following defects. When machining slender motor shaft parts, the radial cutting force of the turning tool (i.e. the force perpendicular to the motor shaft line formed when the turning tool cuts the motor shaft layer by layer) will cause the motor shaft to have a tendency to deform. Once the motor shaft is deformed under pressure, the feed amount of the turning tool on the motor shaft will change, which will increase the stress on the motor shaft and even cause the chuck and the motor shaft to loosen, thereby affecting the stability of the motor shaft turning and the quality of the machined motor shaft. SUMMARY

[0003] In order to overcome the shortcomings pointed out in the background art, the present application provides a positioning tooling for motor shaft machining.

[0004] The technical implementation of the present application is: a positioning tooling for motor shaft machining, comprising a base, the base is provided with a chuck, the base is provided with an electromagnetic slide rail, the electromagnetic slide rail is slidably connected with an electric slide, the electric slide is fixedly connected with a top column, the base is slidably connected with a sliding block, the sliding block is fixedly connected with an electric push rod, the extension part of the electric push rod is fixedly connected with an elastic block, the elastic block is fixedly connected with a support plate, the extension part of the electric push rod and the elastic block are used for actively and passively adjusting the height of the support plate respectively, and the support plate is used for supporting the motor shaft to balance the radial force perpendicular to the axis of the motor shaft during the machining process.

[0005] As a preferred, the sliding block is fixedly connected with symmetrically distributed adjusting frames, and the upper side of the adjusting frame is located above the rotating axis of the chuck.

[0006] As a preferred, the electric slide is fixedly connected with an adjusting block, and the adjusting block is used for extruding the adjacent adjusting frame to move and adjust the position of the adjacent adjusting frame.

[0007] As a preferred, the upper surface of the support plate is an arc surface, so that the support plate is not blocked by the shaft shoulder of the motor shaft when the support plate moves along the surface of the motor shaft.

[0008] As a preferred, the support plate is fixedly connected with a cleaning block, and the cleaning block is used for cleaning the debris on the surface of the motor shaft.

[0009] Preferably, the chuck is fixed with a protective cover, the protective cover is made of elastic material, and the protective cover is used for wiping the surface of the motor shaft.

[0010] Preferably, the protective cover is provided with a channel, and the diameter of the channel gradually decreases from the position far away from the chuck to the position close to the chuck.

[0011] Preferably, the telescopic part of the electric control push rod is fixed with symmetrically distributed limiting frames, the limiting frames are provided with vibration sensors, and the limiting frames are provided with arc surfaces.

[0012] Preferably, the distance between the arc surface and the chuck is greater than the distance between the axis of the electric control push rod and the chuck.

[0013] Preferably, the limiting frames are slidingly connected with extrusion frames, the extrusion frames are used for extruding the elastic blocks, elastic elements are fixed between the extrusion frames and the adjacent limiting frames, the base is fixed with symmetrically distributed limiting plates, the limiting plates are used for limiting the extrusion frames, and the distance between the symmetrically distributed limiting plates gradually decreases from the position close to the chuck to the position far away from the chuck.

[0014] The application has the following beneficial effects: the support plate supports the turning part of the motor shaft, so as to reduce the probability of chuck loosening and motor shaft deformation caused by pressure during turning, thereby ensuring the stability of the motor shaft turning and improving the motor shaft machining quality; the elastic blocks slowly pop out and press the support plate during the process of the motor shaft being continuously turned and thinned; the two adjusting frames move with the turning tool, so that the support plate automatically moves with the position of the turning part and always supports the turning part of the motor shaft; the cleaning block removes the metal scraps on the surface of the motor shaft during the turning process, so as to reduce the residual amount of metal scraps on the surface of the motor shaft; the protective cover scrapes off the impurities on the surface of the motor shaft when the motor shaft passes through the channel, thereby reducing the probability of motor shaft fixing deflection caused by impurities, and ensuring the coaxiality of the motor shaft; the limiting frames are arranged on the side of the motor shaft, and the arc surfaces are arranged to adapt to different diameters of the motor shaft, so that the arc surfaces are close to the motor shaft, and the motor shaft with dynamic balance failure caused by its own defects during rotation can be found in time, so as to quickly process the motor shaft with defects and reduce the invalid steps in subsequent production; the limiting plates limit the extrusion frames, so as to change the extrusion force of the extrusion frames on the elastic blocks, and the elastic blocks have weaker power storage degree when they are closer to the chuck; the support strength of the support plate on the motor shaft is changed according to the length of the motor shaft in the air, and the motor shaft is adaptively supported. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1It is a perspective structural schematic diagram of the invention; Figure 2 It is a perspective structural schematic diagram of the chuck of the invention; Figure 3 It is a perspective structural schematic diagram of the support plate of the invention; Figure 4 It is a perspective structural schematic diagram of the cleaning block of the invention; Figure 5 It is a perspective structural sectional view of the protective cover of the invention; Figure 6 It is a perspective structural schematic diagram of the limiting frame of the invention.

[0016] Meaning of reference numerals in the drawing: 1: base, 2: chuck, 3: electric sliding carriage, 4: top column, 5: sliding block, 6: electric control push rod, 7: elastic block, 8: support plate, 9: adjusting frame, 10: adjusting block, 11: cleaning block, 12: protective cover, 1201: channel, 13: limiting frame, 1301: camber surface, 14: extrusion frame, 15: elastic member, 16: limiting plate. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, purposes and effects achieved by the invention easy to understand, the invention is further described below.

[0018] Example 1

[0019] In the process of turning the motor shaft, the radial cutting force of the turning tool will cause the motor shaft to have a tendency of flexural deformation. Once the motor shaft is deformed under pressure, the feed amount of the turning tool on the motor shaft will change, which will cause the stress of the motor shaft to increase, and even cause the chuck and the motor shaft to loosen, thereby affecting the stability of the motor shaft turning and the quality of the processed motor shaft.

[0020] A positioning tool for motor shaft machining, such as Figures 1-4As shown, including the base 1, the base 1 is provided with a control terminal not shown in the figure, the base 1 is provided with chuck 2, chuck 2 is the existing structure, and is used for clamping the left end of motor shaft, when the motor shaft is turned, the chuck 2 is rotated to drive the motor shaft to rotate, the base 1 is provided with electromagnetic slide rail electrically connected with the control terminal, the electromagnetic slide rail is slidably connected with the electric slide 3, the electric slide 3 is fixedly connected with the top column 4, the electric slide 3 is used to drive the top column 4 to move left and right, after the left end of the motor shaft is clamped by the chuck 2, the electric slide 3 drives the top column 4 to move left, the top column 4 is close to the right end of the motor shaft, the motor shaft is positioned, the base 1 is slidably connected with the sliding block 5, the sliding block 5 is fixedly connected with the electric control push rod 6 electrically connected with the control terminal, the telescopic part of the electric control push rod 6 is fixedly connected with the elastic block 7, the elastic block 7 is fixedly connected with the support plate 8, the telescopic part of the electric control push rod 6 and the elastic block 7 are used to actively and passively adjust the height of the support plate 8, the telescopic part of the electric control push rod 6 drives the support plate 8 to move up and down through the elastic block 7, so that the support plate 8 is close to the motor shaft of different diameters, when the support plate 8 is attached to the motor shaft (the diameter of each section of the motor shaft is different), the elastic block 7 is in the force storage state, the movement of the elastic block 7 is driven by the telescopic part of the electric control push rod 6, the position of the support plate 8 is adjusted, so that the support plate 8 is attached to each section of the motor shaft, the support plate 8 is used to support the motor shaft to resist the radial force perpendicular to the axis of the motor shaft during the machining process, in the process of the motor shaft being continuously thinned, the elastic block 7 is popped out and the support plate 8 is always pressed against the motor shaft to support the motor shaft, the upper surface of the support plate 8 is arc, so that the support plate 8 can move to different diameter sections of the motor shaft when the support plate 8 moves along the surface of the motor shaft, so that the support plate 8 is not blocked by the shaft shoulder of the motor shaft, and the applicability of the device is improved.

[0021] As shown in Figures 2-4 The sliding block 5 is fixedly connected with two adjusting frames 9 which are symmetrically distributed left and right, the upper side of the adjusting frame 9 is located above the rotating axis of the chuck 2, in the process of turning the motor shaft, the turning tool is inserted between the two adjusting frames 9, the turning tool moves left and right and drives the corresponding adjusting frame 9 to move, so that the sliding block 5 moves, thereby adjusting the position of the electric control push rod 6, the elastic block 7 and the support plate 8.

[0022] As shown in Figure 3 The electric slide 3 is fixedly connected with the adjusting block 10, when the electric slide 3 drives the adjusting block 10 to move left, the adjusting block 10 presses the right adjusting frame 9 to move, so as to adjust the position of the right adjusting frame 9, the horizontal distance between the center of the support plate 8 and the right edge of the right adjusting frame 9 is X, the horizontal distance between the left side of the top column 4 and the left side of the adjusting block 10 is Y, X=Y, so that when the top column 4 moves to contact the motor shaft, the adjusting block 10 is attached to the right adjusting frame 9, and the center of the support plate 8 is located at the right end surface of the motor shaft.

[0023] The specific working principle is as follows: Initially, the electric slide 3 is located at the rightmost side of the electromagnetic slide rail, and the sliding block 5 is located at the right limit position.

[0024] When the operator needs to use the device to position the motor shaft, the operator clamps the motor shaft on the chuck 2, and then starts the electric push rod 6 through the control terminal. The telescopic part of the electric push rod 6 drives the support plate 8 to move up and down through the elastic block 7, so that the support plate 8 is in contact with the motor shaft. Then the telescopic part of the electric push rod 6 moves upward, so that the elastic block 7 is deformed and stores energy. Subsequently, the electromagnetic slide rail of the base 1 is started through the control terminal, so that the electric slide 3 drives the top column 4 to move left until the top column 4 presses the right end surface of the motor shaft, and the electromagnetic slide rail of the base 1 is closed to realize the positioning of the motor shaft.

[0025] During the left movement of the electric slide 3, the electric slide 3 drives the right adjusting frame 9 to move left through the adjusting block 10. When the top column 4 moves to contact the right end surface of the motor shaft, the adjusting block 10 is in contact with the adjusting frame 9 because X=Y, so the center of the support plate 8 is located at the right end surface of the motor shaft.

[0026] When the motor shaft is positioned, the turning tool is inserted between the two adjusting frames 9, the turning tool is in close contact with the motor shaft and feeds layer by layer, the motor shaft is rotated by the chuck 2, and the motor shaft is turned. During the turning process of the motor shaft, the turning tool is pressed against the motor shaft, and during the movement of the turning tool, the turning tool drives the sliding block 5 to move through the corresponding adjusting frame 9, so that the electric push rod 6, the elastic block 7 and the support plate 8 are always located below the turning tool. The turning part of the motor shaft is supported by the support plate 8 to reduce the probability of chuck 2 loosening and motor shaft deformation caused by pressure during turning, thereby ensuring the stability of the motor shaft turning and improving the motor shaft machining quality.

[0027] When the right part of the motor shaft is turned, the chuck 2 is stopped, the operator starts the electromagnetic slide rail of the base 1 through the control terminal, the electric slide 3 drives the top column 4 to move right to reset, the operator moves the sliding block 5 right, and after the sliding block 5 is reset, the motor shaft is taken off from the chuck 2, the right part of the motor shaft is fixed to the chuck 2, and the above steps are repeated to process the left end of the motor shaft. When the motor shaft is machined, the electromagnetic slide rail of the base 1 is closed to collect the motor shaft.

[0028] Example 2

[0029] Based on example 1, as Figure 3 and Figure 4As shown, the support plate 8 is fixedly connected with the cleaning block 11. During rotation of the motor shaft, the cleaning block 11 cleans the debris on the surface of the motor shaft, so as to reduce the residual amount of metal debris on the surface of the motor shaft, improve the surface quality of the motor shaft, and reduce the probability of the motor shaft being fixedly inclined due to the existence of residual metal debris between the right part of the motor shaft and the chuck 2 when the right part of the motor shaft needs to be clamped, so as to guarantee the coaxiality of the motor shaft.

[0030] Embodiment 3

[0031] On the basis of embodiment 2, as shown in Figure 1 and Figure 5 As shown, the chuck 2 is fixedly connected with the protective cover 12. The protective cover 12 is made of elastic material. The protective cover 12 is used for wiping the surface of the motor shaft, so as to reduce the impurity amount (such as metal debris in the turning process) between the chuck 2 and the motor shaft. The protective cover 12 is provided with the passage 1201. The diameter of the passage 1201 gradually decreases from right to left. The diameter of the left side of the passage 1201 is smaller than the minimum diameter of the motor shaft. The passage 1201 is used for guiding the motor shafts with different diameters. When the motor shaft passes through the passage 1201, the protective cover 12 scrapes off the impurities on the surface of the motor shaft, so as to reduce the probability of the motor shaft being positioned inclined due to the existence of impurities between the motor shaft and the chuck 2, thereby guaranteeing the coaxiality of the motor shaft after machining.

[0032] Embodiment 4

[0033] On the basis of embodiment 3, as shown in Figure 1 , Figure 4 and Figure 6As shown, the telescopic part of the electric control push rod 6 is fixed with two limit racks 13 symmetrically distributed in front and back, the limit rack 13 is provided with a vibration sensor electrically connected with the control terminal, wherein the vibration sensor is of a prior structure and not shown in the figure, the limit rack 13 is provided with an arc surface 1301, the two arc surfaces 1301 are close to the front and back of the motor shaft, in the process of grinding the motor shaft, if the motor shaft itself loses dynamic balance due to defects (such as surface process defects, internal density uneven distribution), the motor shaft will vibrate, when the motor shaft vibrates, the motor shaft will contact with the arc surface 1301 to limit the vibration amplitude of the motor shaft, at this time the vibration is transmitted to the vibration sensor through the limit rack 13, the vibration sensor transmits the received vibration to the control terminal, so that the operator can find the motor shaft defect in time and replace the motor shaft, when the diameters of different types of motor shafts are different, the telescopic part of the electric control push rod 6 moves downward to drive the two limit racks 13 to move up and down, the distance between the arc surface 1301 and the motor shaft changes synchronously to adapt to the different diameters of different types of motor shafts, the distance between the arc surface 1301 and the chuck 2 is greater than the distance between the axis of the electric control push rod 6 and the chuck 2, when the axis of the electric control push rod 6 is aligned with the variable diameter part of the motor shaft, the arc surface 1301 does not move to the variable diameter part of the motor shaft, at this time the telescopic part of the electric control push rod 6 drives the two limit racks 13 to move downward to ensure that the limit rack 13 and the arc surface 1301 smoothly pass through the variable diameter part of the motor shaft, the limit rack 13 is slidingly connected with an extrusion rack 14, the extrusion rack 14 is used for extruding the elastic block 7, the extrusion rack 14 and the adjacent limit rack 13 are fixed with an elastic member 15, wherein the elastic member 15 is a tension spring, the base 1 is fixed with limit plates 16 symmetrically distributed in front and back, when the motor shaft is turned, the telescopic part of the electric control push rod 6 drives the extrusion rack 14 to move left (at this time the elastic member 15 is in a tension and storage state), the extrusion rack 14 moves along the adjacent limit plate 16, the limit plate 16 limits the extrusion rack 14, because the distance between the symmetrically distributed limit plates 16 gradually decreases from left to right, the elastic member 15 gradually contracts, the two extrusion racks 14 move away from each other, the extrusion force of the two extrusion racks 14 on the elastic block 7 decreases, so that the closer to the chuck 2, the weaker the storage degree of the elastic block 7, according to the length of the motor shaft in the air, the support strength of the support plate 8 on the motor shaft is changed to adaptively support the motor shaft.

[0034] In conclusion, the above is only a preferred embodiment of the present application, not for limiting the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A positioning fixture for machining a motor shaft, comprising a base (1), wherein a chuck (2) is mounted on the base (1), and an electromagnetic slide rail is provided on the base (1), wherein an electric slide carriage (3) is slidably connected within the electromagnetic slide rail, and a top column (4) is fixedly connected to the electric slide carriage (3), characterized in that, The base (1) is slidably connected to a sliding block (5), the sliding block (5) is fixedly connected to an electric control push rod (6), the telescopic part of the electric control push rod (6) is fixedly connected to an elastic block (7), the elastic block (7) is fixedly connected to a support plate (8), the telescopic part of the electric control push rod (6) and the elastic block (7) are used to actively and passively adjust the height of the support plate (8), and the support plate (8) is used to support the motor shaft to counteract the radial force perpendicular to its axis that the motor shaft experiences during the machining process.

2. A positioning fixture for machining a motor shaft according to claim 1, characterized in that, The sliding block (5) is fixed with symmetrically distributed adjustment frames (9), and the upper side of the adjustment frame (9) is located above the rotation axis of the chuck (2).

3. A positioning fixture for machining a motor shaft according to claim 2, characterized in that, The electric slide (3) is fixedly connected to an adjustment block (10), which is used to press the adjacent adjustment frame (9) to move, so as to adjust the position of the adjacent adjustment frame (9).

4. A positioning fixture for machining a motor shaft according to claim 1, characterized in that, The upper surface of the support plate (8) is an arc surface, which is used to prevent the support plate (8) from being stuck by the shoulder of the motor shaft when the support plate (8) moves along the surface of the motor shaft.

5. A positioning fixture for machining a motor shaft according to claim 4, characterized in that, The support plate (8) is fixedly connected to a cleaning block (11), which is used to clean debris from the surface of the motor shaft.

6. A positioning fixture for machining a motor shaft according to claim 1, characterized in that, The chuck (2) is fixed with a protective cover (12), which is made of elastic material and is used to wipe the surface of the motor shaft.

7. A positioning fixture for machining a motor shaft according to claim 6, characterized in that, The protective cover (12) is provided with a channel (1201), the diameter of which gradually decreases from the distance away from the chuck (2) to the distance closer to it.

8. A positioning fixture for machining a motor shaft according to claim 1, characterized in that, The telescopic part of the electric push rod (6) is fixed with symmetrically distributed limit frames (13), the limit frames (13) are equipped with vibration sensors, and the limit frames (13) are equipped with arc surfaces (1301).

9. A positioning fixture for machining a motor shaft according to claim 8, characterized in that, The distance between the arc surface (1301) and the chuck (2) is greater than the distance between the axis of the electrically controlled push rod (6) and the chuck (2).

10. A positioning fixture for machining a motor shaft according to claim 9, characterized in that, The limiting frame (13) is slidably connected to the extrusion frame (14), which is used to extrude the elastic block (7). An elastic element (15) is fixed between the extrusion frame (14) and the adjacent limiting frame (13). The base (1) is fixed with symmetrically distributed limiting plates (16), which are used to limit the extrusion frame (14). The distance between the symmetrically distributed limiting plates (16) gradually decreases from the point near the chuck (2) to the point far away.

Images