Tool for detecting symmetry degree of key groove of motor shaft

Abstract

The utility model relates to the technical field of keyway detection tools, and provides a motor shaft keyway symmetry degree detection tool for solving the problems of inconvenience in operation and low detection efficiency in the conventional workpiece keyway symmetry degree measurement process, which comprises a detection ring which can be sleeved on the outer side wall of a motor shaft. The outer side wall of the motor shaft abuts against the inner side wall of the detection ring. The detection ring is provided with a base and a movable frame arranged on the surface of the base, the detection ring is movably connected with the movable frame, and the detection ring can reciprocate along a straight line. According to the motor shaft keyway symmetry degree detection tool, whether the size of the side wall surface, the symmetry degree and the like of the motor shaft to be detected meet the requirements or not is judged by observing whether the detection ring can smoothly move along the linear direction or the specific speed of falling to different heights or not in the falling process, the operation is convenient, and the detection efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of keyway inspection tools, in particular to a tool for inspecting the symmetry of a motor shaft keyway. Background Art

[0002] A keyway is a slot on a shaft or in a hole that mates with a key and is used to receive the key and transmit torque. Keyway symmetry refers to the symmetry requirement for the keyway in part design. Specifically, it refers to the symmetrical error between the keyway centerlines on a part. In actual industrial applications, this error must be controlled within a certain tolerance to ensure part interchangeability and assembly accuracy. Therefore, after keyway production is completed, symmetry testing is required to determine whether it meets the requirements.

[0003] For example, the patent with announcement number CN218765067U provides a measuring fixture for the symmetry of the keyway of brake product parts, including an annular circular base plate, a micrometer is arranged on the inner ring side of the circular base plate, and multiple guide rails are arranged between the micrometer and the circular base plate, so that the micrometer can accurately measure the symmetry of the keyway of the product part, solving the problem of large errors in the symmetry detection of the circular keyway, significantly improving the detection accuracy, and ensuring product quality.

[0004] However, in actual production and inspection work, when machining double keyways on the outer circle of motor shafts, motor shaft products are manually selected and inspected, which results in low inspection efficiency, slow alignment process, and inconvenient operation. Utility Model Content

[0005] The purpose of this utility model is to solve the problems of inconvenient operation and low detection efficiency in the existing workpiece keyway symmetry measurement process. This application provides a keyway symmetry detection tool. By observing whether the detection ring can move smoothly in a straight line during the falling process or the specific speed of falling to different heights, it can determine whether the side wall size and symmetry of the motor shaft to be tested meet the requirements. It is easy to operate and has high detection efficiency.

[0006] The utility model is achieved through the following technical solutions:

[0007] A tool for detecting the symmetry of a motor shaft keyway comprises a detection ring, which can be sleeved on the outer wall of the motor shaft, and the outer wall of the motor shaft abuts against the inner wall of the detection ring; the detection ring is provided with a base and a movable frame arranged on the surface of the base, the detection ring is movably connected to the movable frame, and the detection ring can reciprocate along a straight line.

[0008] Preferably, a placement platform is provided on the surface of the base, and the placement platform is located on one side of the movable frame; a vertical groove is recessed on the surface of the placement platform, and the motor shaft can be vertically arranged in the vertical groove.

[0009] Preferably, the detection ring is provided with a connecting rod, which is movably connected to the side wall of the movable frame; when the detection ring is arranged on the side wall of the movable frame, the center of the detection ring and the center of the vertical groove are located in the same vertical direction.

[0010] Preferably, one end of the connecting rod is detachably connected to the detection ring, and the other end of the connecting rod is provided with a collar, which can be sleeved on the outer wall of the movable frame, and a positioning bolt is passed through the side of the collar away from the connecting rod.

[0011] Preferably, the movable frame includes a vertical rod, the bottom of the vertical rod is passed through the bottom of the base, and a limiting block is configured at the bottom of the vertical rod, and a limiting groove is recessed at the bottom of the base, and the limiting groove can accommodate the limiting block.

[0012] Preferably, an assembly platform is provided at the bottom of the vertical pole, the assembly platform is passed through the base, and the limit block is located on the top of the assembly platform, and the vertical pole is detachably connected to the surface of the assembly platform.

[0013] Preferably, a plurality of speed detectors are embedded in the side wall surface of the vertical pole, and the plurality of speed detectors are sequentially spaced from top to bottom along the same vertical direction.

[0014] The technical solution of the utility model has the following beneficial effects:

[0015] This new motor shaft keyway symmetry testing tool determines the conformity of the keyway's dimensions and other aspects by observing the linear motion of a test ring on the motor shaft's outer sidewall. Specifically, the motor shaft to be tested is placed upright in a vertical slot on a table, the test ring is placed over the top of the motor shaft, and the ring is allowed to fall freely. The tool then observes whether the ring can move smoothly in a straight line or drop to different heights at specific speeds to determine whether the sidewall dimensions and symmetry of the motor shaft meet the requirements. This tool offers convenient operation and high testing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic diagram of the structure of the detection ring in Example 1 from a first perspective;

[0018] Figure 2This is a schematic diagram of the structure of the detection ring in Example 1 from a second viewing angle;

[0019] Figure 3 This is a schematic structural diagram of the motor shaft keyway symmetry detection tool in Example 1.

[0020] Icons: 1-Detection ring, 11-Connecting rod, 12-Ring, 13-Locking bolt, 2-Base, 21-Limiting slot, 3-Movable frame, 31-Vertical pole, 32-Limiting block, 33-Assembly table, 4-Placement table, 41-Vertical slot, 51-Speed ​​meter. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0024] Example 1

[0025] like Figures 1 to 3 As shown, this embodiment provides a motor shaft keyway symmetry detection tool, including a detection ring 1, which can be sleeved on the outer wall of the motor shaft, and the outer wall of the motor shaft abuts the inner wall of the detection ring 1; the detection ring 1 is equipped with a base 2 and a movable frame 3 configured on the surface of the base 2, and the detection ring 1 is movably connected to the movable frame 3. The detection ring 1 can reciprocate along a straight line. By observing the linear motion of the detection ring 1 on the outer wall of the motor shaft, the size of the electrolytic keyway and other factors can be judged to be qualified. Among them, the inner ring diameter and other dimensions of the detection ring 1 are set by those skilled in the art according to the specific specifications of the workpiece to be detected to complete the detection of the required workpiece product.

[0026] In this embodiment, a placement table 4 is provided on the surface of the base 2, and the placement table 4 is located on one side of the movable frame 3; a vertical groove 41 is recessed on the surface of the placement table 4, and when in use, the motor shaft can be vertically placed in the vertical groove 41; the detection ring 1 is provided with a connecting rod 11, and the connecting rod 11 is movably connected to the side wall of the movable frame 3; when the detection ring 1 is arranged on the side wall of the movable frame 3, the center of the detection ring 1 and the center of the vertical groove 41 are located in the same vertical direction, so that the detection ring 1 can move vertically downward along the outer side wall of the motor shaft to be detected.

[0027] In this embodiment, one end of the connecting rod 11 is integrally formed with the detection ring 1, and the other end of the connecting rod 11 is provided with a ring 12. The ring 12 can be mounted on the outer wall of the movable frame 3, and a positioning bolt 13 is passed through the side of the ring 12 away from the connecting rod 11, which is used to fix the detection ring 1 to the movable frame 3 before and after use to avoid problems such as loss.

[0028] In this embodiment, the movable frame 3 includes a vertical rod 31, the bottom of the vertical rod 31 is passed through the bottom of the base 2, and a limit block 32 is configured at the bottom of the vertical rod 31, and a limit groove 21 is recessed at the bottom of the base 2. The limit groove 21 can accommodate the limit block 32 for fixing the position of the vertical rod 31, etc.; an assembly platform 33 is configured at the bottom of the vertical rod 31, the assembly platform 33 is passed through the base 2, and the limit block 32 is located at the top of the assembly platform 33, and the vertical rod 31 is screwed to the surface of the assembly platform 33, which is convenient for later adjustment or maintenance of the device.

[0029] In this embodiment, two tachometers 51 are embedded in the side wall of the vertical rod 31. The tachometers 51 are equipped with a power supply and a display screen, and the two tachometers 51 are spaced apart from each other in the same vertical direction from top to bottom. When inspecting the motor shaft keyway, by allowing the inspection ring 1 to fall freely from top to bottom, and comparing the falling speed of the inspection ring 1 at different heights with the falling speed of the inspection ring 1 measured by the speedometer 51, it is possible to determine whether the side wall size and symmetry of the motor shaft to be inspected meet the requirements. If the falling speed is equivalent or within a certain range, the requirements are met. If the falling speed is less than the set range, it indicates that the outer wall of the motor shaft is uneven during the falling process, resulting in the obstruction of the falling process of the inspection ring 1. In addition, when using this motor shaft keyway symmetry inspection tool for rough inspection, it is also possible to directly determine whether the inspection ring 1 can move smoothly on the outer wall of the motor shaft by visual observation.

[0030] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A motor shaft keyway symmetry detection tool, characterized in that: It comprises a detection ring (1), wherein the detection ring (1) can be sleeved on the outer side wall of the motor shaft, and the outer side wall of the motor shaft abuts against the inner side wall of the detection ring (1); The detection ring (1) is provided with a base (2) and a movable frame (3) arranged on the surface of the base (2); the detection ring (1) is movably connected to the movable frame (3), and the detection ring (1) can reciprocate along a straight line.

2. The motor shaft keyway symmetry detection tool according to claim 1, characterized in that: The surface of the base (2) is provided with a placement platform (4), and the placement platform (4) is located on one side of the movable frame (3); a vertical groove (41) is recessed on the surface of the placement platform (4), and the motor shaft can be vertically arranged in the vertical groove (41).

3. The motor shaft keyway symmetry detection tool according to claim 2, characterized in that: The detection ring (1) is provided with a connecting rod (11), and the connecting rod (11) is movably connected to the side wall surface of the movable frame (3); When the detection ring (1) is arranged on the side wall surface of the movable frame (3), the center of the detection ring (1) and the center of the vertical groove (41) are located in the same vertical direction.

4. The motor shaft keyway symmetry detection tool according to claim 3, characterized in that: One end of the connecting rod (11) is detachably connected to the detection ring (1), and the other end of the connecting rod (11) is provided with a collar (12). The collar (12) can be sleeved on the outer wall of the movable frame (3), and a positioning bolt (13) is passed through the side of the collar (12) away from the connecting rod (11).

5. The motor shaft keyway symmetry detection tool according to any one of claims 1 to 4, characterized in that: The movable frame (3) comprises a vertical rod (31), the bottom of the vertical rod (31) is passed through the bottom of the base (2), and a limiting block (32) is arranged at the bottom of the vertical rod (31), and a limiting groove (21) is recessed at the bottom of the base (2), and the limiting groove (21) can accommodate the limiting block (32).

6. The motor shaft keyway symmetry detection tool according to claim 5, characterized in that: An assembly platform (33) is provided at the bottom of the vertical pole (31), the assembly platform (33) is passed through the base (2), and the limit block (32) is located at the top of the assembly platform (33), and the vertical pole (31) and the surface of the assembly platform (33) are detachably connected.

7. The motor shaft keyway symmetry detection tool according to claim 5, characterized in that: A plurality of speed meters (51) are embedded in the side wall surface of the vertical pole (31), and the plurality of speed meters (51) are sequentially separated and arranged from top to bottom along the same vertical direction.

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