Positioning tool for machining motor shaft

Abstract

The application belongs to the technical field of positioning tooling, and particularly aims at a positioning tooling for motor shaft machining. The positioning tooling comprises a base, a chuck installed on the base, an electric sliding rail connected to the base through electromagnetic sliding, an electric sliding frame fixedly connected to the electric sliding rail, a top column fixedly connected to the electric sliding frame, a sliding block slidably connected to the base, an electric control push rod fixedly connected to the sliding block, an elastic block fixedly connected to the electric control push rod, a supporting plate fixedly connected to the elastic block, and the electric control push rod and the elastic block are respectively used for actively and passively adjusting the height of the supporting plate. The supporting plate is used for supporting the motor shaft to counteract the radial force perpendicular to the axis of the motor shaft in the motor shaft machining process. The application supports the turning part of the motor shaft through the supporting plate to reduce the probability of chuck loosening and motor shaft deformation caused by pressure in the turning process, thereby ensuring the stability of the motor shaft turning and improving the motor shaft machining quality.

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 counterbalance 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 that the chuck loosens and the motor shaft deforms due to 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 that the motor shaft is 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 the metal scraps; 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 that the motor shaft is fixedly inclined due to the impurities between the motor shaft and the chuck, 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 timely find the motor shaft that fails in dynamic balance during rotation due to its own defects, 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, the elastic blocks have a weaker storage force 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 chuck of the application;

[0016] Figure 2 It is a perspective structural schematic diagram of the chuck of the application;

[0017] Figure 3 It is a perspective structural schematic diagram of the support plate of the application;

[0018] Figure 4 It is a perspective structural schematic diagram of the cleaning block of the application;

[0019] Figure 5 It is a perspective structural sectional view of the protective cover of the application;

[0020] Figure 6 It is a perspective structural schematic diagram of the limiting frame of the application.

[0021] The meanings of the reference numerals in the drawings are as follows: 1, base; 2, chuck; 3, electric sliding frame; 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, arc surface; 14, extrusion frame; 15, elastic member; 16, limiting plate. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, purposes and effects achieved by the application easy to understand, the application is further described below.

[0023] Example 1

[0024] 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 compressed and deformed, 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.

[0025] 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 the 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 close to different sections of the motor shaft (the diameters of each section on the motor shaft are 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 close to each section on the motor shaft, the support plate 8 is used to support the motor shaft, so as to resist the radial force perpendicular to the axis of the motor shaft in the process of machining the motor shaft, in the process of continuously turning the motor shaft to become thin, the elastic block 7 is popped out and makes the support plate 8 always press the motor shaft, so as to support the motor shaft, the upper surface of the support plate 8 is arc surface, 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.

[0026] As Figures 2-4 shown, 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.

[0027] As Figure 3 shown, 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 extrudes 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 close 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.

[0028] The specific working principle is as follows:

[0029] 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.

[0030] 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.

[0031] 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 that the center of the support plate 8 is located at the right end surface of the motor shaft.

[0032] 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 extrudes 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 loosening of the chuck 2 and deformation of the motor shaft caused by pressure during the turning process, thereby ensuring the stability of the motor shaft turning and improving the processing quality of the motor shaft.

[0033] 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 processed, the electromagnetic slide rail of the base 1 is closed to collect the motor shaft.

[0034] Example 2

[0035] Based on example 1, such 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.

[0036] Embodiment 3

[0037] On the basis of embodiment 2, as shown in Figure 1 , Figure 5 As shown, the chuck 2 is fixedly connected with the protective cover 12. The protective cover 12 is made of elastic material and is used for wiping the surface of the motor shaft, so as to reduce the amount of impurities (such as metal debris in the turning process) between the chuck 2 and the motor shaft. The protective cover 12 is provided with a 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.

[0038] Embodiment 4

[0039] On the basis of embodiment 3, as shown in Figure 1 , Figure 4 As shown, the chuck 2 is fixedly connected with the protective cover 12. The protective cover 12 is made of elastic material and is used for wiping the surface of the motor shaft, so as to reduce the amount of impurities (such as metal debris in the turning process) between the chuck 2 and the motor shaft. The protective cover 12 is provided with a 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. 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.

[0040] To sum up, 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 principles of the present application shall be included in the protection scope of the present application.

Claims

1. A positioning tool for machining of a motor shaft, comprising a base (1) provided with a chuck (2), the base (1) being provided with an electromagnetic slide rail, an electric slide carriage (3) being slidably connected in the electromagnetic slide rail, a jacking post (4) being fixedly connected to the electric slide carriage (3), characterized in that, The base (1) is slidably connected with a sliding block (5), the sliding block (5) is fixedly connected with an electric control push rod (6), the telescopic part of the electric control push rod (6) is fixedly connected with an elastic block (7), the elastic block (7) is fixedly connected with a support plate (8), the telescopic part of the electric control push rod (6) and the elastic block (7) are respectively used for actively and passively adjusting the height of the support plate (8), and the support plate (8) is used for supporting the motor shaft to counteract the radial force perpendicular to the axis of the motor shaft during the machining process of the motor shaft. The upper surface of the support plate (8) is an arc surface, so that the support plate (8) is not blocked by the shaft shoulder of the motor shaft when the support plate (8) moves along the surface of the motor shaft. The support plate (8) is fixedly connected with a cleaning block (11), and the cleaning block (11) is used for cleaning the debris on the surface of the motor shaft. The chuck (2) is fixedly connected with a protective cover (12), the protective cover (12) is made of elastic material, and the protective cover (12) is used for wiping the surface of the motor shaft. The protective cover (12) is provided with a channel (1201), and the diameter of the channel (1201) gradually decreases from the position far away from the chuck (2) to the position close to the chuck (2). The telescopic part of the electric control push rod (6) is fixedly connected with symmetrically distributed limit frames (13), the limit frames (13) are provided with vibration sensors, and the limit frames (13) are provided with arc surfaces (1301). The distance between the arc surfaces (1301) and the chuck (2) is greater than the distance between the axis of the electric control push rod (6) and the chuck (2). The limit frames (13) are slidably connected with extrusion frames (14), the extrusion frames (14) are used for extruding the elastic block (7), the extrusion frames (14) and the adjacent limit frames (13) are fixedly connected with elastic members (15), the base (1) is fixedly connected with symmetrically distributed limit plates (16), the limit plates (16) are used for limiting the positions of the extrusion frames (14), and the distance between the symmetrically distributed limit plates (16) gradually decreases from the position close to the chuck (2) to the position far away from the chuck (2).

2. The positioning tool for machining a motor shaft according to claim 1, wherein The sliding block (5) is fixedly connected 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. The positioning tool for machining a motor shaft according to claim 2, wherein The electrically driven slide (3) is fixedly connected with an adjustment block (10), the adjustment block (10) is used for extruding the adjacent adjustment frame (9) to move, so as to adjust the position of the adjacent adjustment frame (9).

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