A positioning tool for new energy motor shaft machining

Abstract

The utility model discloses a new energy motor shaft processing is with positioning frock, including support base plate, lifting structure, adjusting motor and support seat body. Support seat body is assembled on support base plate through lifting structure, and the upper portion of support seat body is equipped with V type groove, and the motor shaft is supported through the positioning roll in V type groove. The lifting structure contains lifting adjusting lever, and is connected with adjusting motor drive, and is provided with displacement sensor in the bottom of V type groove, and the displacement sensor is connected with adjusting motor signal. Thus constitute a closed loop control system, can when motor shaft axial movement, real -time detection its outer diameter change, and automatic drive lifting structure adjustment support height, make positioning roll always with motor shaft periphery keep adaptive contact. The frock effectively solved the vibration problem in the processing of long axle, and significantly improved the processing precision, surface quality and production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of shaft positioning technology, specifically relating to a positioning fixture for machining new energy motor shafts. Background Technology

[0002] In the manufacturing process of new energy motor shafts, especially electric vehicle drive motor shafts, the requirements for machining accuracy, coaxiality, and surface quality are extremely stringent. These motor shafts are often slender shafts with a large length-to-diameter ratio, and often have multi-step, tapered, or other variable-diameter structures in the axial direction. When performing precision turning, grinding, and other external cylindrical machining on them, traditional positioning and support tooling reveals significant limitations.

[0003] Currently, the commonly used center supports and other support devices have fixed support positions. When machining shafts of different diameters, operators must manually stop the machine, loosen, adjust, and re-lock the support positions and heights. This process is not only time-consuming and labor-intensive, severely limiting machining efficiency, but also relies heavily on the operator's experience, making it difficult to guarantee adjustment accuracy, and easily causing scratches or indentations on the finished surface. More importantly, because it cannot dynamically adapt to changes in the workpiece shape during machining, when the tool moves away from the fixed support point or when machining small-diameter shafts, the workpiece rigidity decreases, easily causing machining vibration and chatter, resulting in workpiece dimensional deviations and surface chatter marks, seriously affecting the final product quality and yield.

[0004] Therefore, there is an urgent need in this field for a new type of positioning fixture that can automatically adapt to changes in the shape of the workpiece and provide continuous and stable support in order to solve the above-mentioned technical pain points. Utility Model Content

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution.

[0006] A positioning fixture for machining the shaft of a new energy motor includes a support base plate, a lifting structure, an adjusting motor, and a support base. The support base is mounted on the support base plate via the lifting structure. The support base has a V-groove, and positioning rollers are mounted on the inclined surfaces on both sides of the V-groove. The positioning rollers are configured such that their axes are perpendicular to the axis of the motor shaft. A displacement sensor is provided at the bottom of the V-groove. The displacement sensor is used to detect the radial position of the outer circumferential surface of the motor shaft in real time when the shaft moves axially. The displacement sensor is signal-connected to the adjusting motor. The lifting structure includes a lifting adjusting rod, and the adjusting motor is drivenly connected to the lifting adjusting rod.

[0007] As a preferred embodiment of the positioning fixture, the lifting structure includes a lifting seat and two lifting blocks symmetrically arranged on both sides of the lifting seat. The lifting seat is used to install a support body. The lifting seat has an inclined first contact surface on both sides, and a first guide groove is formed on the first contact surface. The lifting block has a second contact surface that fits the first contact surface, and a first guide rail that matches the first guide groove is formed on the second contact surface. The support base plate has a second guide rail, and the bottom of the lifting block has a second guide groove that matches the second guide rail.

[0008] As a preferred embodiment of the positioning fixture, the lifting adjustment rod includes a limiting section located in the middle and lifting threaded sections with opposite threads located on both sides; the support base plate is provided with a limiting block, and the limiting block is provided with a limiting groove that matches the limiting section; the lifting block is provided with a threaded groove, and the two lifting threaded sections are respectively screwed into the threaded grooves of the two sets of lifting blocks.

[0009] In a preferred embodiment of the positioning fixture, the support base plate is provided with a guide rod, and the support seat is provided with a guide hole that matches the guide rod.

[0010] Compared with the prior art, this application has the following beneficial technical effects:

[0011] 1. It changes the traditional work mode that requires repeated manual adjustments to tooling. Throughout the entire processing, the support height can be automatically adjusted according to the change of shaft diameter, without the need for mid-process intervention, thus improving production efficiency.

[0012] 2. Using positioning rollers for support transforms the sliding friction between the workpiece and the support into rolling friction. This ensures the stability of the support and greatly reduces frictional resistance during axial movement, effectively avoiding scratches and wear on the machined surface of the workpiece caused by traditional hard support blocks, thereby improving the product qualification rate. Attached Figure Description

[0013] Figure 1 This is a three-dimensional view of the processing equipment.

[0014] Figure 2 This is a schematic diagram of the sub-base.

[0015] Figure 3 This is an exploded view of the end positioning fixture.

[0016] Figure 4 Exploded view of the structure supporting the positioning fixture.

[0017] The following is an explanation of the reference numerals in the attached figures:

[0018] 100. Gantry frame; 110. Lifting module; 120. Machining mechanism;

[0019] 200. Main base; 210. Lateral movement module; 220. Secondary base; 230. Longitudinal movement module; 240. Workpiece platform; 241. Positioning slide rail;

[0020] 300. End positioning fixture; 310. Positioning base plate; 320. End seat; 321. Positioning groove; 322. Through hole;

[0021] 400. Support positioning fixture; 410. Support base plate; 420. Support seat; 421. V-groove; 430. Positioning roller; 440. Displacement sensor; 450. Adjustment motor;

[0022] 500. Lifting structure; 510. Lifting seat; 511. First contact surface; 512. First guide groove; 513. Second guide rail; 514. Guide hole; 515. Guide rod; 520. Lifting block; 521. Second contact surface; 522. First guide rail; 523. Second guide groove; 530. Lifting adjustment rod; 531. Limiting section; 532. Lifting threaded section; 540. Limiting block; 541. Limiting groove;

[0023] 600. Adjustment assembly; 610. Longitudinal adjustment rod; 620. Guide block; 630. Longitudinal adjustment handle. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] In the following embodiments, the same or similar reference numerals denote the same or similar components or components with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0026] In the description of this utility model, it should be understood that the terms such as center, longitudinal, transverse, length, width, thickness, upper, lower, front, back, left, right, vertical, horizontal, top, bottom, inner, outer, clockwise, and counterclockwise, indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features shown. In the description of this utility model, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] like Figure 1-4As shown, a processing device for a new energy motor shaft includes a gantry frame 100 and a main base 200. A processing mechanism 120 is installed on the gantry frame 100 via a lifting module 110, and a positioning mechanism is installed on the main base 200. The processing mechanism 120 is used to process the outer peripheral surface of the motor shaft, and the positioning mechanism is used to accurately position and support the motor shaft during the processing.

[0028] The positioning mechanism includes a sub-base 220, a longitudinal movement module 230, a workpiece platform 240, an end positioning fixture 300, and a support positioning fixture 400. The longitudinal movement module 230 is mounted on the sub-base 220. The workpiece platform 240 is mounted on the sub-base 220 via the longitudinal movement module 230 and can be driven to move axially along the motor shaft. For further support and guidance, the workpiece platform 240 is provided with an axially extending positioning slide rail 241. The end positioning fixture 300 is slidably mounted on the positioning slide rail 241, and there are two sets of end positioning fixtures 300, used to position and support both ends of the motor shaft respectively. The support positioning fixture 400 is also slidably mounted on the positioning slide rail 241, thereby obtaining bottom support from the workpiece platform 240 and preventing overhang deformation. Meanwhile, the support positioning fixture 400 is fixedly connected to the sub-base 220 and located directly below the processing station of the processing mechanism 120, so that its position relative to the processing mechanism 120 remains fixed during operation.

[0029] In this embodiment, the processing mechanism 120 may specifically be a drilling mechanism for processing radial holes in the motor shaft.

[0030] Regarding the end-positioning fixture 300, please refer to... Figure 3 The end positioning fixture 300 includes a positioning base plate 310, on which an end-facing seat 320 is mounted via a lifting structure 500. The end-facing seat 320 has a positioning groove 321. Crucially, the positioning groove 321 has a trumpet-shaped (or conical) positioning surface. This surface is used to conform to the chamfer at the end face of the motor shaft step, utilizing its self-centering principle to achieve rapid and precise axial positioning and alignment of the motor shaft. Furthermore, the bottom of the positioning groove 321 has a through hole 322 that passes through the end of the end-facing seat 320 to allow the motor shaft end to pass through. This design allows a small-diameter section of the motor shaft end to pass through, enabling the device to support and process shaft parts with lengths exceeding the conventional stroke of the workpiece stage 240, significantly improving the versatility and processing range of the equipment.

[0031] Regarding the 400 support positioning fixture, please refer to... Figure 4The supporting positioning fixture 400 includes a supporting base plate 410, on which a supporting seat 420 is mounted via a lifting structure 500. The supporting seat 420 has a V-groove 421 for supporting the outer diameter of the motor shaft. Positioning rollers 430 are mounted on the inclined surfaces on both sides of the V-groove 421, and the axes of these positioning rollers 430 are configured perpendicular to the axis of the motor shaft. This V-groove 421 structure provides stable radial positioning, while the introduction of the positioning rollers 430 converts potential sliding friction into rolling friction, thereby greatly reducing frictional resistance when the motor shaft needs to move axially, effectively preventing scratches and wear on the machined surface of the workpiece.

[0032] Regarding the lifting structure 500, the lifting structure 500 includes a lifting base 510, two lifting blocks 520 symmetrically arranged on both sides of the lifting base 510, and a lifting adjustment rod 530. The lifting base 510 is used to mount the end-facing seat 320 or the support seat 420. To achieve precise and stable lifting, the lifting base 510 has inclined first contact surfaces 511 on both sides, and a first guide groove 512 is formed on the first contact surface 511. The lifting blocks 520 have second contact surfaces 521 that fit against the first contact surfaces 511, and a first guide rail 522 that matches the first guide groove 512 is formed on the second contact surface 521. The positioning base plate 310 or the support base plate 410 has a second guide rail 513, and the bottom of the lifting blocks 520 has a second guide groove 523 that matches the second guide rail 513. The symmetrically designed lifting blocks 520 ensure that the two sides of the lifting base 510 move synchronously, avoiding jamming and uneven loading, thereby ensuring that the end-facing seat 320 or the support seat 420 always moves horizontally. Furthermore, the positioning base plate 310 or the support base plate 410 is provided with a guide rod 515, and the support base 420 is provided with a guide hole 514 that cooperates with the guide rod 515. The cooperation between the guide rod 515 and the guide hole 514 can prevent the lifting base 510 from shaking and ensure the reliability of the movement of the lifting base 510.

[0033] The lifting adjustment rod 530 includes a limiting section 531 located in the middle and lifting threaded sections 532 with opposite threads on both sides; the positioning base plate 310 or support base plate 410 is provided with a limiting block 540, and the limiting block 540 is provided with a limiting groove 541 that matches the limiting section 531; the lifting block 520 is provided with a threaded groove, and the two lifting threaded sections 532 respectively form a helical pair with the threaded grooves of the two sets of lifting blocks 520. By rotating the lifting adjustment rod 530, the lifting blocks 520 on both sides can be precisely and synchronously driven to move towards or away from each other, thereby converting into the vertical displacement of the lifting seat 510, realizing precise adjustment of the support height and reliable self-locking.

[0034] As a preferred automated implementation, the lifting adjustment rod 530 of the support positioning fixture 400 is connected to an adjustment motor 450, which drives the lifting adjustment rod 530 to rotate, thereby realizing the automatic lifting and lowering of the support base 420. A displacement sensor 440 is provided at the bottom of the V-groove 421. The displacement sensor 440 is used to detect the radial position of the outer circumferential surface of the motor shaft in real time when the motor shaft moves axially. The displacement sensor 440 is signal-connected to the adjustment motor 450, which is configured to drive the lifting adjustment rod 530 to rotate according to the detection signal from the displacement sensor 440, thereby automatically adjusting the height of the support base 420 so that the positioning roller 430 in the V-groove 421 always maintains adaptive contact with the outer circumference of the motor shaft of different diameters. The displacement sensor 440, in conjunction with the adjusting motor 450, can automatically identify the shaft diameter and adjust the support height without manual intervention. It can maintain the optimal contact between the support point and the outer surface of the workpiece based on the change in the outer diameter of the motor shaft when the motor shaft moves axially, through real-time feedback and control. This provides continuous and stable vibration damping support for shaft segments of different diameters, significantly improving the overall processing quality.

[0035] To further improve operational efficiency, the workpiece stage 240 is also equipped with a pitch adjustment assembly 600. The pitch adjustment assembly 600 includes a longitudinal adjustment rod 610, whose two ends are rotatably connected to the workpiece stage 240. The longitudinal adjustment rod 610 has two longitudinal threaded sections with opposite directions of rotation. The end positioning fixture 300 is equipped with guide blocks 620, and the two longitudinal threaded sections are respectively screwed to the guide blocks 620 of the two sets of end positioning fixtures 300. The end of the longitudinal adjustment rod 610 is equipped with a longitudinal adjustment handle 630. By rotating the longitudinal adjustment rod 610, the positioning assemblies at both ends can be synchronously driven to move in opposite directions, quickly adapting to motor shafts of different lengths. The adjustment process is efficient and precise, ensuring that the center of the motor shaft is always located on the theoretical centerline of the machine tool.

[0036] Furthermore, the processing apparatus described in this application also includes a transverse movement module 210, on which the sub-base 220 is mounted. The transverse movement module 210 is used to drive the sub-base 220 to move radially along the motor shaft. The radial relative position between the positioning mechanism and the processing mechanism 120 can be adjusted through the transverse movement module 210, facilitating eccentric processing and expanding the processing capability of the apparatus.

[0037] The scope of protection of this utility model includes, but is not limited to, the above embodiments. The scope of protection of this utility model is defined by the claims. Any substitutions, modifications, or improvements to this technology that are easily conceived by those skilled in the art shall fall within the scope of protection of this utility model.

Claims

1. A positioning fixture for machining the shaft of a new energy motor, characterized in that, The system includes a support base plate (410), a lifting structure (500), an adjusting motor (450), and a support base (420). The support base (420) is mounted on the support base plate (410) via the lifting structure (500). The support base (420) is provided with a V-groove (421). Positioning rollers (430) are mounted on the inclined surfaces on both sides of the V-groove (421). The positioning rollers (430) are configured such that their axes are perpendicular to the axis of the motor shaft. The bottom of the V-groove (421) is provided with a displacement sensor (440), which is used to detect the radial position of the outer circumferential surface of the motor shaft in real time when the motor shaft moves axially. The displacement sensor (440) is connected to the regulating motor (450) by signal. The lifting structure (500) includes a lifting regulating rod (530), and the regulating motor (450) is driven to connect with the lifting regulating rod (530).

2. The positioning fixture for machining a new energy motor shaft according to claim 1, characterized in that, The lifting structure (500) includes a lifting seat (510) and two lifting blocks (520) symmetrically arranged on both sides of the lifting seat (510). The lifting seat (510) is used to install the support body (420). The lifting seat (510) has an inclined first contact surface (511) on both sides. A first guide groove (512) is opened on the first contact surface (511). The lifting block (520) has a second contact surface (521) that fits the first contact surface (511). A first guide rail (522) that matches the first guide groove (512) is provided on the second contact surface (521). A second guide rail (513) is provided on the support base plate (410). A second guide groove (523) that matches the second guide rail (513) is provided at the bottom of the lifting block (520).

3. The positioning fixture for machining a new energy motor shaft according to claim 2, characterized in that, The lifting adjustment rod (530) includes a limiting section (531) located in the middle and lifting threaded sections (532) with opposite threads on both sides; the support base plate (410) is provided with a limiting block (540), and the limiting block (540) is provided with a limiting groove (541) that matches the limiting section (531); the lifting block (520) is provided with a threaded groove, and the two lifting threaded sections (532) are respectively screwed into the threaded grooves of the two sets of lifting blocks (520).

4. The positioning fixture for machining a new energy motor shaft according to claim 2, characterized in that, The support base plate (410) is provided with a guide rod (515), and the support seat (420) is provided with a guide hole (514) that cooperates with the guide rod (515).

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