A fixture for machining keyway of motor shaft

Abstract

The utility model proposes a fixture for machining keyways of motor shafts, comprising a base plate; a four-axis turntable, arranged at one end of the base plate; a chuck, coaxially connected to the four-axis turntable, the chuck having a clamping claw; a first top, coaxially connected to the chuck; a support, axially slidably arranged at the other end of the base plate; a second top, arranged on the support, and coaxially arranged with the first top. The utility model provides a four-axis turntable, a chuck and a support, the clamping claw of the chuck can clamp the motor shaft, the four-axis turntable provides a degree of rotational freedom, and can automatically rotate the motor shaft to a preset angle for machining the keyway, the position of the support can be adjusted according to the length of the motor shaft, and the top can be pressed against the motor shaft at the same time, thereby improving the machining efficiency and the machining accuracy of the keyway.

Description

Technical Field

[0001] The utility model relates to the technical field of motor manufacturing, in particular to a clamp for machining a motor shaft keyway. Background Art

[0002] The motor shaft keyway is a groove machined on the motor shaft that matches the key and extends along the axis of the motor shaft. The motor shaft keyway is used in conjunction with the key to stabilize the connection between the motor shaft and related components, thereby transmitting torque and enabling the motor to operate normally. The motor shaft keyway has position requirements.

[0003] In the prior art, the motor shaft is mounted on the processing platform using a fixture, and the tool processes the motor shaft keyway on the motor shaft at the current position, and then the operator rotates the chuck to a certain angle to drive the motor shaft to rotate synchronously to the next position to process the motor shaft keyway. This process is repeated until all the keyways on the motor shaft are processed.

[0004] In the process of realizing the utility model, the inventors found that there are at least the following problems in the prior art: the manual rotation of the chuck is slow, which affects the processing efficiency, and is also prone to angle deviation, reducing the processing accuracy of the motor shaft keyway. Utility Model Content

[0005] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0006] To this end, the purpose of the utility model is to provide a fixture for machining a motor shaft keyway, which can automatically rotate the motor shaft so that the angle of the keyway in the circumferential direction meets the design requirements, thereby improving machining accuracy and efficiency.

[0007] In order to achieve the above-mentioned object, the utility model provides a fixture for machining a keyway of a motor shaft, comprising:

[0008] Base plate;

[0009] A four-axis turntable, arranged at one end of the bottom plate;

[0010] A chuck, coaxially connected to the four-axis turntable, the chuck having a clamping claw;

[0011] A first top, coaxially connected to the chuck;

[0012] A support, slidably disposed along the axial direction at the other end of the base plate;

[0013] The second top point is arranged on the support and is coaxially arranged with the first top point.

[0014] According to the fixture for processing the keyway of a motor shaft of the utility model, a four-axis turntable, a chuck and a support are provided. The jaws of the chuck can clamp the motor shaft. The four-axis turntable provides rotational freedom and can automatically rotate the motor shaft to a preset angle for processing the keyway. The position of the support can be adjusted according to the length of the motor shaft and the center can be pressed against the motor shaft at the same time, thereby improving the processing efficiency and the processing accuracy of the keyway.

[0015] According to an embodiment of the utility model, it also includes an axial motion part, which is arranged on the support, and the axial motion part has a telescopic rod, and the second tip is arranged on the telescopic rod.

[0016] According to an embodiment of the utility model, the axial motion part is an electric cylinder or a pneumatic cylinder.

[0017] According to an embodiment of the utility model, it also includes a linear module, the linear module is arranged on the base plate, and the axial motion part is arranged on the linear module.

[0018] According to one embodiment of the utility model, the linear module includes a slider, a guide rail and a first fastener, the guide rail is arranged on the base plate along the axial direction of the chuck, the slider is slidably matched with the guide rail, and the first fastener connects the support and the slider.

[0019] According to an embodiment of the utility model, the bottom plate is provided with a row of mounting holes along both sides of the guide rail, and the first fastener is connected to the mounting holes after passing through the support and the slider.

[0020] According to one embodiment of the utility model, it also includes a corner cylinder and a floating support member, the corner cylinder has a pressure arm, the corner cylinder and the floating support member are both arranged between the first top and the second top, and the position of the pressure arm after pressing down and rotating is opposite to the floating support member.

[0021] According to an embodiment of the utility model, it also includes a clamping block, which is arranged on the clamping claw and has a curved surface.

[0022] According to an embodiment of the utility model, it also includes a first supporting assembly and a second supporting assembly, wherein the first supporting assembly is disposed adjacent to the first pinnacle, and the second supporting assembly is disposed adjacent to the second pinnacle.

[0023] According to an embodiment of the present utility model, the tops of the first supporting assembly and the second supporting assembly have V-shaped grooves.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Various other advantages and benefits will become apparent to those skilled in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only used for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. In addition, the same reference symbols are used throughout the accompanying drawings to represent the same components. Among them:

[0026] Figure 1 The utility model is a schematic diagram of the structure of a fixture for machining a keyway of a motor shaft according to an embodiment of the present invention.

[0027] Figure 2 The utility model is a schematic diagram of the bottom structure of a fixture for machining a keyway of a motor shaft according to an embodiment of the present invention.

[0028] Figure 3 The utility model is a schematic diagram of the working of a fixture for machining a keyway of a motor shaft according to an embodiment of the present invention.

[0029] Description of reference numerals:

[0030] 1-base plate, 2-first support assembly, 3-second support assembly, 4-support, 5-second center, 6-four-axis turntable, 7-linear module, 8-chuck, 9-angle cylinder, 11-first center, 12-floating support, 13-stop block, 14-connecting block, 15-de-weighting hole, 21-first support plate, 22-first support block, 41-axial motion part, 71-slider, 72-guide rail, 73-first fastener, 81-clamp, 82-clamping block, 91-pressure arm, 100-fixture for motor shaft keyway processing, 101-second fastener, 102-mounting hole, 200-motor shaft, 201-keyway. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. 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. On the contrary, the embodiments of the present invention include all changes, modifications and equivalents that fall within the spirit and connotation of the appended claims.

[0032] Refer to the following Figures 1 to 3 , describes a fixture 100 for machining a keyway of a motor shaft according to an embodiment of the present utility model.

[0033] Combination Figures 1 to 3As shown, the fixture 100 for machining the keyway of a motor shaft according to an embodiment of the utility model comprises a base plate 1, a four-axis turntable 6, a chuck 8, a first center 11, a support 4 and a second center 5.

[0034] The base plate 1 is mainly used for supporting and connecting with the workbench of the machine tool, and is used to support and carry the four-axis turntable 6, the chuck 8, the first center 11, the support 4, the second center 5 and the motor shaft and other components. The four-axis turntable 6 is arranged at one end of the base plate 1. The four-axis turntable can provide an additional degree of rotational freedom for the existing three-axis CNC machine tool, so that the machine tool can realize four-axis linkage processing. The four-axis turntable 6 is configured as the fourth axis of the CNC machine tool, and is used for the keyway 201 of the motor shaft 200 to accurately index the keyway 201, ensuring that the circumferential angle of the keyway 201 meets the design requirements. The chuck 8 is coaxially connected to the four-axis turntable 6, and the chuck 8 has a clamping jaw 81. The clamping jaw 81 of the chuck clamps the motor shaft 200 in the radial direction, so that it is firmly positioned on the workbench of the machine tool for milling, drilling, grinding and other processing operations. The support 4 can be slidably arranged at the other end of the base plate 1 along the axial direction. The first center 11 is coaxially connected to the chuck 8, and the second center 5 is arranged on the support 4 and is coaxially arranged with the first center 11. The support 4 can drive the second tip 5 to move axially by sliding, and clamp the motor shaft 200 axially. The two tips can provide precise positioning points for the motor shaft to ensure the coaxiality and stability of the motor shaft during processing. The support 4 and the base plate 1 can form a sliding connection by means of a slide rail, a ball screw, etc. After reaching the clamping position, the support 4 is fixed to the base plate 1 by a fastener to maintain the axial clamping force on the motor shaft.

[0035] According to the fixture for processing the keyway of a motor shaft according to the embodiment of the utility model, a four-axis turntable, a chuck and a support are provided. The jaws of the chuck can clamp the motor shaft. The four-axis turntable provides rotational freedom and can automatically rotate the motor shaft to a preset angle for processing the keyway. The position of the support can be adjusted according to the length of the motor shaft and the center can be pressed against the motor shaft at the same time, thereby improving the processing efficiency and the processing accuracy of the keyway.

[0036] Combination Figures 1 to 3 As shown, in some embodiments, the fixture 100 for machining the keyway of the motor shaft also includes an axial motion part 41, the axial motion part 41 is arranged on the support 4, the axial motion part 41 has a telescopic rod, and the second tip 5 is arranged on the telescopic rod. The power source of the axial motion part 41 is selected according to actual needs, and there is no specific restriction on this. Exemplarily, the axial motion part 41 is an electric cylinder or a pneumatic cylinder, which has the advantages of being oil-free and pollution-free. It should be noted that the second tip 5 and the telescopic rod can be connected by threaded fixing, snap-on fixing, etc. Since the telescopic rod can be continuously extended and retracted in the axial direction, after the support 4 and the base plate 1 are fastened, the end holes at both ends of the motor shaft and the two tips can be clamped by moving the telescopic rod.

[0037] The fixture for machining the keyway of the motor shaft also includes a linear module 7, which is arranged on the base plate 1, and the axial motion part 41 is arranged on the linear module 7. The linear module 7 includes a slider 71, a guide rail 72 and a first fastener 73. The guide rail 72 is arranged on the base plate 1 along the axial direction of the chuck 8, the slider 71 is slidably matched with the guide rail 72, and the first fastener 73 connects the support 4 with the slider 71. The linear module 7 is a mechanical component for realizing linear motion, which can provide smooth and consistent linear motion, and has a more compact structure, which helps to save space. The first fastener 73 can be a bolt or a pin. In one example, one end of the guide rail 72 is flush with the end of the base plate 1, and a stop block 13 is installed on the side of this end of the base plate 1 to prevent the slider 71 from exceeding the range of motion.

[0038] In order to lock the support 4 and the slider 71 at a suitable position on the bottom plate 1, the bottom plate 1 is provided with a row of mounting holes 102 along both sides of the guide rail 72, and the first fastener 73 penetrates the support 4 and the slider 71 and is connected to the mounting holes 102. The gap between adjacent mounting holes 102 is set according to actual needs and is not specifically limited thereto.

[0039] In some embodiments, in combination Figures 1 to 3 As shown, the motor shaft 200 with a longer length may vibrate during keyway processing. In order to reduce vibration and improve processing accuracy, the fixture 100 for motor shaft keyway processing also includes an angle cylinder 9 and a floating support 12. The angle cylinder 9 has a pressure arm 91. The angle cylinder 9 and the floating support 12 are both arranged between the first center 11 and the second center 5. The position of the pressure arm 91 after pressing down and rotating is opposite to the floating support 12. The floating support 12 is a mechanical support element that allows a certain degree of movement or floating, and is mainly used to absorb vibration, reduce stress concentration, etc. It should be noted that the positions of the angle cylinder 9 and the floating support 12 avoid the position of the keyway to be processed.

[0040] In one example, the rotation angle of the angle cylinder is 90 degrees. When the telescopic rod moves axially, the cylinder has a certain rotation stroke, and the rotation stroke also causes the pressure arm 91 to rotate to a specified 90 degree angle to complete the linear clamping stroke. The floating support 12 has elastic materials such as rubber and springs inside to provide buffering and absorb vibration.

[0041] In order to make the chuck 8 clamp the motor shaft better, the motor shaft keyway processing fixture further includes a clamping block 82, which is arranged on the clamping claw 81 and has an arc surface that matches the clamping surface corresponding to the motor shaft.

[0042] In some embodiments, in combination Figures 1 to 3As shown, the fixture 100 for machining the keyway of the motor shaft also includes a first support assembly 2 and a second support assembly 3. The first support assembly 2 is arranged adjacent to the first top 11, and the second support assembly 3 is arranged adjacent to the second top 5. The first support assembly 2 and the second support assembly 3 play the function of rough positioning for the motor shaft, which is convenient for loading and unloading and reduces the labor intensity of operators. The tops of the first support assembly 2 and the second support assembly 3 have V-shaped grooves, which support and position the motor shaft and reduce the eccentricity of the motor shaft when it rotates. The contact area between the V-shaped groove and the motor shaft is small, which is conducive to reducing friction.

[0043] The first support assembly 2 includes a first support plate 21 and a first support block 22 connected together, the first support block 22 is arranged on the bottom plate 1, and the first support plate 21 is provided with a strip hole extending in the vertical direction. The strip hole provides an adjustment range for the height adjustment of the first support plate 21. Similarly, the second support assembly 3 is also provided with a strip hole extending in the vertical direction, and the second support assembly 3 is connected to the support 4.

[0044] In addition, the bottom plate 1 is Figure 1 A plurality of second fasteners 101 are provided on the front and rear sides of the bottom plate 1, and a connecting block 14 is provided at the bottom of the bottom plate 1, and the second fasteners 101 are connected to the connecting block 14. The cross section of the connecting block 14 is convex and can be connected to the long groove on the working platform of the machine tool. A plurality of deweighting holes 15 are also provided at the bottom of the bottom plate 1 to reduce the weight of the entire fixture.

[0045] It can be seen from the above that the fixture for machining the keyway of the motor shaft of the embodiment of the utility model realizes the precision keyway machining of the motor shaft, improves the flexibility and stability of operation, reduces the difficulty of operation, and improves the overall machining efficiency and the machining quality of the motor shaft.

[0046] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] In the description of the present invention, the directions or positional relationships indicated by the terms "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0050] Any process or method description in the flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A fixture for machining a motor shaft keyway, characterized in that: include: Bottom plate (1); A four-axis turntable (6) is arranged at one end of the base plate (1); A chuck (8) is coaxially connected to the four-axis turntable (6), and the chuck (8) has a clamping claw (81); A first center (11) coaxially connected to the chuck (8); A support (4) is axially slidably disposed at the other end of the base plate (1); A second top (5) is disposed on the support (4) and is coaxially arranged with the first top (11); A corner cylinder (9) and a floating support (12), wherein the corner cylinder (9) has a pressing arm (91), and both the corner cylinder (9) and the floating support (12) are arranged between the first center (11) and the second center (5), and the position of the pressing arm (91) after pressing down and rotating is opposite to the floating support (12).

2. The motor shaft keyway machining fixture according to claim 1, characterized in that: It also comprises an axial motion part (41), wherein the axial motion part (41) is arranged on the support (4), the axial motion part (41) has a telescopic rod, and the second tip (5) is arranged on the telescopic rod.

3. The fixture for machining the keyway of a motor shaft according to claim 2, characterized in that: The axial motion part (41) is an electric cylinder or a pneumatic cylinder.

4. The motor shaft keyway machining fixture according to claim 2, characterized in that: It also comprises a linear module (7), wherein the linear module (7) is arranged on the base plate (1), and the axial motion portion (41) is arranged on the linear module (7).

5. The fixture for machining the keyway of a motor shaft according to claim 4, characterized in that: The linear module (7) comprises a slider (71), a guide rail (72) and a first fastener (73); the guide rail (72) is arranged on the base plate (1) along the axial direction of the chuck (8); the slider (71) is slidably matched with the guide rail (72); and the first fastener (73) connects the support (4) and the slider (71).

6. The fixture for machining the keyway of a motor shaft according to claim 5, characterized in that: The bottom plate (1) is provided with a row of mounting holes (102) along both sides of the guide rail (72), and the first fastener (73) is connected to the mounting holes (102) after passing through the support (4) and the slider (71).

7. The fixture for machining the keyway of a motor shaft according to claim 1, characterized in that: It also includes a clamping block (82), wherein the clamping block (82) is arranged on the clamping claw (81), and the clamping block (82) is provided with a curved surface.

8. The fixture for machining the keyway of a motor shaft according to any one of claims 1 to 7, characterized in that: It also comprises a first supporting assembly (2) and a second supporting assembly (3), wherein the first supporting assembly (2) is arranged adjacent to the first apex (11), and the second supporting assembly (3) is arranged adjacent to the second apex (5).

9. The fixture for machining the keyway of a motor shaft according to claim 8, characterized in that: The tops of the first supporting assembly (2) and the second supporting assembly (3) are provided with V-shaped grooves.

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