A micro motor axial gap detection device

Abstract

The utility model relates to a kind of micro motor axial gap detection devices, including moving frame, clamping part and tensiometer;Measured motor is installed in clamping part, and one moving frame is oppositely arranged in clamping part end face, and moving frame includes rotating screw and the rotating disc connected with rotating screw;One movable block is adaptively set on rotating screw, a tensiometer is fixedly connected on movable block, and tensiometer end head is connected with the motor shaft end head of measured motor;Clamping part includes clamping base and fixed block, clamping base and fixed block are in butt joint and are provided with installation groove, and clamping base and fixed block are connected by multiple springs;First, measured motor is installed in clamping part, rotating screw is rotated by rotating rotating disc, movable block is displaced along rotating screw axial direction, so that tensiometer exerts axial tension or thrust on connected motor shaft, and reads the dial gauge value.The utility model reaches the beneficial effect is: it is convenient to install and operate and measured motor is stably held.

Description

Technical Field

[0001] This utility model relates to the field of motor testing technology, and in particular to a device for detecting the axial clearance of a micro motor. Background Technology

[0002] Detecting the axial clearance of a motor is one of the indicators for evaluating the overall physical characteristics of the motor. When the motor rotor is limited by axial components such as the stator or end cover, the axial movement distance, i.e., the axial runout, is the maximum allowable movement of the motor shaft in its axial direction. The fit clearance between the motor shaft and the inner ring of the bearing or between the bearing housing and the casing is the main factor causing axial runout. The amount of axial clearance runout affects the service life of the motor. Therefore, detecting the axial clearance of the motor is an important technical indicator to ensure the quality of the motor.

[0003] Currently, after the motor is placed in a simple fixture and clamped, the operator pulls the motor shaft along the axial direction until it can no longer be pulled. At the same time, a dial indicator is used to measure its axial displacement to obtain the required axial clearance value. However, when the motor is pulled directly by hand, the applied force is not stable enough and does not meet the requirements. Furthermore, when the clamping force of the fixture on the motor is insufficient, the motor will shake, slip, or shift, resulting in unstable test results. Therefore, how to improve the stability of the motor testing process is an urgent problem to be solved.

[0004] Therefore, based on customer feedback regarding the shortcomings of the existing device structure, the inventors made further improvements to overcome the aforementioned problems. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a micro-motor axial clearance detection device that stably supports the motor under test, is suitable for testing motors of various sizes, and is easy to install and operate.

[0006] The purpose of this utility model is achieved through the following technical solution: a micro motor axial clearance detection device, wherein a dial indicator is axially mounted on the motor to be tested, including a moving frame, a clamping part and a tension gauge;

[0007] The motor under test is installed in the clamping part. A movable frame is set opposite one end face of the clamping part. The movable frame includes a rotating screw and a turntable connected to the rotating screw. A movable block is adapted to be installed on the rotating screw. A tension gauge is fixedly connected to the movable block, and the end of the tension gauge is connected to the end of the motor shaft of the motor under test. The clamping part includes a base and a fixed block. The base and the fixed block are connected vertically and have an installation groove. An air bladder layer is provided in the installation groove. The air bladder layer covers the bottom surface of the upper and lower half of the groove and contacts and wraps the motor when the base and the fixed block are connected. After the air bladder is inflated, it further fixes the motor. It is suitable for clamping motors of different diameters. The motor under test is inserted and fixed in the installation groove. The base and the fixed block are connected by multiple springs.

[0008] During testing, the motor to be tested is first installed in the clamping part. Then, the rotating turntable is rotated to make the rotating screw rotate synchronously. The movable block that is fitted in the same way moves axially along the rotating screw, so that the tension gauge connected to the upper side of the movable block applies axial tension or thrust to the connected motor shaft and reads the dial gauge value.

[0009] As a preferred technical solution of this application, the mounting groove includes an upper half groove and a lower half groove; the lower half groove is opened on the upper part of the base, and the upper half groove is opened on the lower part of the fixing block. The two grooves are arranged opposite each other and are both semi-cylindrical grooves. After the base and the fixing block are connected vertically, a cylindrical groove for placing the motor under test is formed.

[0010] As a preferred technical solution of this application, the end of the tension gauge is connected to the end of the motor shaft of the motor being tested via a coupling.

[0011] As a preferred technical solution of this application, a spring is provided at each of the four corners of the base, with the lower end of the spring connected to the base and the upper end connected to the corner of the fixing block.

[0012] After applying force to the fixing block and pulling it upward, place the motor under test into the mounting slot. Release the fixing block, and due to the spring action, the fixing block will move downward to fix the motor under test between the fixing block and the base.

[0013] As a preferred technical solution of this application, the movable frame further includes a limiting rod; the limiting rod is divided into rod A and rod B, which are located on the left and right sides of the rotating screw, respectively, and the two rods are fixed together with the rotating screw by the mounting plate.

[0014] As a preferred technical solution of this application, the movable block has three parallel through holes, the central through hole having an internal thread, so that the movable block is fitted into the movable frame, and the central through hole cooperates with the rotating screw.

[0015] As a preferred technical solution of this application, a baffle is provided on one end face of the mounting slot facing the movable frame, and the motor is further fixed and clamped by the baffle.

[0016] This utility model has the following advantages:

[0017] (1) The overall structure of the detection device is simple, making it easy to operate, install, and observe the values;

[0018] This solution uses a rotating lead screw mechanism to drive a connected tension gauge to move, thereby generating a pulling or pushing force on the motor shaft connected to the tension gauge. This applies a specified force to the axial direction of the motor being tested. Once the tension gauge displays that the applied force requirement is met, the value read from the dial indicator is the actual measured value of the axial clearance of the motor being tested. The overall structure is very simple, making it easy to install the motor. The combination of the tension gauge and the dial indicator also facilitates observation.

[0019] (2) Stable support for the motor under test and applicable to the testing of motors of various sizes;

[0020] This design incorporates an airbag layer within the motor mounting slot. The airbag layer, along with a baffle, further secures the motor to its outer surface. Simultaneously, the spring's return action compresses the motor, preventing it from slipping or moving. Attached Figure Description

[0021] Figure 1 This is a first-view structural schematic diagram of the present invention;

[0022] Figure 2 This is a top-view structural schematic diagram of the present invention;

[0023] Figure 3 This is a structural schematic diagram of the present invention from a second perspective;

[0024] Figure 4 This is a schematic diagram of the structure of this utility model from a side view;

[0025] In the diagram: 1-moving lead screw, 2-turntable, 3-moving block, 4-tension gauge, 5-motor under test, 6-airbag layer, 7-base, 8-fixed block, 9-motor shaft, 10-coupling, 11-spring, 12-baffle, 13-rod A, 14-rod B, 15-mounting plate A, 16-mounting plate B. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0027] It should be noted that the orientation or positional relationship indicated by terms such as "left" and "right" is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this invention is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. Such terms are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0029] Therefore, based on the above issues, please refer to Figure 1 This utility model proposes a 9-axis clearance detection device for micro motors to solve the problem.

[0030] See Figures 1-4 The present implementation scheme proposes a 9-axis clearance detection device for a micro motor, which includes a tension gauge 4, a moving frame and a clamping part;

[0031] Among them, see Figure 1 A dial indicator is mounted axially on the motor 5 under test, and the motor 5 under test is inserted and fixed in the clamping part. The motor shaft 9 of the motor 5 under test is connected to the end of a tension gauge 4, and the tension gauge 4 is mounted on a movable frame. The movable frame is positioned opposite the clamping part, and the movable frame includes a rotating lead screw and a turntable 2 connected to one end of the rotating lead screw. The rotating lead screw can be rotated synchronously by rotating the turntable 2. A movable block 3 is sleeved on the rotating lead screw, and the tension gauge 4 is fixed on the upper surface of the movable block 3.

[0032] Among them, see Figure 1 and Figure 2 The clamping part includes a base 7 and a fixing block 8; the base 7 and the fixing block 8 are directly opposite each other in the vertical direction and a mounting groove is provided at the joint position of the two. The motor 5 to be tested is adapted to be installed in the mounting groove. An airbag layer 6 is provided in the mounting groove. The airbag layer 6 covers the bottom surface of the upper and lower half of the groove and contacts and wraps the motor when the base 7 and the fixing block 8 are connected. After the airbag is inflated, it further fixes the motor. At the same time, multiple springs 11 are provided between the base 7 and the fixing block 8 (the base 7 and the fixing block 8 are spliced ​​together by the springs 11).

[0033] During operation, the motor 5 under test is installed between the base 7 and the fixed block 8 of the clamping part. Rotating the turntable 2 causes the rotating screw in the moving frame to rotate, thereby causing the movable block 3, which is sleeved on the rotating screw, to move axially along the moving frame. Since the tension gauge 4 on the movable block 3 is connected to the motor shaft 9, when the movable block 3 is driven to move away from the clamping part, the tension gauge 4 applies a certain axial tension to the motor shaft 9, which facilitates the measurement of the axial clearance value of the motor.

[0034] Currently, after clamping the motor, the axial displacement is measured by a dial indicator while pulling the motor shaft 9 to obtain the required axial clearance value. However, the current clamping components often fail to clamp the motor stably enough, and the applied force is also unstable. As a result, the motor sometimes shakes, slips, or shifts, making the test results unstable. Therefore, this solution designs an axial clearance detection device. It sets up a clamping part and a moving frame with a moving lead screw 1 to cooperate with each other. The lead screw drives the tension gauge 4 to shift, thereby pulling the clamped motor for measurement. The overall structure is relatively simple. Moreover, the clamping part in this solution consists of two parts, upper and lower, and an air bladder layer 6 is provided in the mounting groove for clamping the motor to further fit the outer surface of the motor for fixation. At the same time, the return action of the spring 11 can press the motor tightly to prevent it from slipping and moving.

[0035] In this embodiment, see Figure 1 and Figure 3 The clamping part has an installation groove, which includes an upper groove and a lower groove. The upper and lower grooves are opposite each other to form a cylindrical through groove (to facilitate the installation of the motor body inside). The lower groove is opened in the upper part of the base 7 (that is, the upper part of the base 7 is hollowed out to form a semi-cylindrical groove shape), and the upper groove is opened in the lower part of the fixing block 8, which is also in the shape of a semi-cylindrical groove. When the base 7 and the fixing block 8 are connected vertically, they together form a cylindrical groove for placing the motor 5 under test. At the same time, a spring 11 is set at each of the four corners of the base 7. The bottom end of the spring 11 is connected to the base 7, and the top end of the spring 11 is connected to the corner of the fixing block 8. When no upward pulling force is applied to the fixing block 8, the spring 11 keeps the fixing block 8 and the base 7 close together. When an upward pulling force is applied to the fixing block 8, the motor 5 under test is placed into the installation groove. The fixing block 8 is released. Due to the action of the spring 11, the fixing block 8 moves downward to fix the motor 5 under test between the fixing block 8 and the base 7.

[0036] Furthermore, a baffle 12 is provided on the end face of the mounting slot facing the movable frame. The baffle 12 is divided into an upper baffle 12 and a lower baffle 12. The upper baffle 12 is connected to the end face of the upper half of the slot, and the lower baffle 12 is connected to the end face of the lower half of the slot. The motor is further fixed and clamped by the upper and lower baffles 12.

[0037] It should be noted that if a frame is provided inside the airbag layer 6 in the mounting slot, the presence of the frame will further clamp and fix the motor while the airbag is inflated and the motor is fixed and positioned.

[0038] In this embodiment, see Figure 2 and Figure 3For the movable frame, the movable frame also includes two limiting rods, namely rod A13 and rod B14. Rods A13 and B14 are both smooth cylindrical rods with the same length as the rotating screw. Rods A13 and B14 are located on the left and right sides of the rotating screw, respectively, and are fixed together with the rotating screw by a mounting plate. The two rods are fixed together with the left end of the rotating screw by a mounting plate A15, and the other end is fixed by a mounting plate B16. At the same time, three parallel through holes are opened on the movable block 3, and the central through hole has an internal thread, so that the movable block 3 is fitted into the movable frame, and the central through hole cooperates with the rotating screw. The tension gauge 4 is set on the upper surface of the movable block 3, and the end of the tension gauge 4 is connected to the end of the motor shaft 9 of the motor 5 being tested by a coupling 10.

[0039] Furthermore, turntable 2 is a disc-shaped hand crank, which is installed at the tail end of the rotating screw and located on the rear side of the mounting plate B16. The operator can easily rotate turntable 2 to make the rotating screw rotate.

[0040] After the motor 5 to be tested is installed between the base 7 and the fixed block 8 of the clamping part, the operator rotates the turntable 2 to rotate the rotating screw in the moving frame, thereby causing the movable block 3 to move axially away from the clamping part along the moving frame. A tension gauge 4 is connected to the motor shaft 9 through the coupling 10. When the movable block 3 is driven to move, the tension gauge 4 applies a certain axial tension to the motor shaft 9, which facilitates the measurement of the axial clearance value of the motor. At this time, the airbag layer 6 is inflated so that the airbag layer 6 fully fits the outer surface of the motor and fixes it.

[0041] Currently, the clamping components used for motor clamping are often not stable enough, and the applied force is also not stable enough. As a result, the motor may sometimes shake, slip, or shift. Therefore, it is very important to improve the stability of the motor testing process. This solution sets up a clamping part and a moving frame with a moving lead screw 1 to cooperate with each other. The lead screw drives the force gauge 4 to move, thereby pulling the clamped motor for measurement. The overall structure is relatively simple. Moreover, the clamping part in this solution is divided into upper and lower parts, and an air bag layer 6 is provided in the mounting groove for clamping the motor. The air bag layer 6 and the baffle 12 are set to further fit the outer surface of the motor for fixation. At the same time, the return action of the spring 11 can press the motor tightly to prevent it from slipping and moving.

[0042] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A micro-motor axial clearance detection device, wherein a dial indicator is axially mounted on the motor (5) under test, characterized in that: Includes a movable frame, a clamping part, and a tension gauge (4); The motor under test (5) is installed in the clamping part. A movable frame is set on one end face of the clamping part. The movable frame includes a rotating screw and a turntable (2) connected to the rotating screw. A movable block (3) is adapted to be installed on the rotating screw. A tension gauge (4) is fixedly connected to the movable block (3), and the end of the tension gauge (4) is connected to the end of the motor shaft (9) of the motor under test (5). The clamping part includes a base (7) and a fixed block (8). The base (7) and the fixed block (8) are connected vertically and have an installation groove. An airbag layer (6) is provided in the installation groove. The airbag layer (6) covers the bottom surface of the upper and lower half of the groove and contacts and wraps the motor when the base (7) and the fixed block (8) are connected. After the airbag is inflated, the motor is further fixed. It is also suitable for motors of different diameters. The motor under test (5) is inserted and fixed in the installation groove. The base (7) and the fixed block (8) are connected by multiple springs (11). During testing, the motor (5) to be tested is first installed in the clamping part. Then, the rotating turntable (2) is rotated synchronously to make the rotating screw rotate. The movable block (3) fitted in the same way moves axially along the rotating screw, so that the tension gauge (4) connected to the upper side of the movable block (3) applies axial tension or thrust to the connected motor shaft (9) and reads the dial gauge value.

2. The axial clearance detection device for a micro-motor according to claim 1, characterized in that: The mounting slot includes an upper slot and a lower slot; the lower slot is located on the upper part of the base (7), and the upper slot is located on the lower part of the fixing block (8). The two slots are arranged opposite each other and are both semi-cylindrical slots. After the base (7) and the fixing block (8) are connected vertically, a cylindrical slot is formed for mounting the motor (5) under test.

3. The axial clearance detection device for a micro-motor according to claim 1, characterized in that: The end of the tension gauge (4) is connected to the end of the motor shaft (9) of the motor being tested (5) via a coupling (10).

4. The axial clearance detection device for a micro-motor according to claim 3, characterized in that: A spring (11) is provided at each of the four corners of the base (7). The lower end of the spring (11) is connected to the base (7), and the upper end is connected to the corner of the fixing block (8). After applying force to the fixing block (8) and pulling it upward, the motor (5) under test is placed into the mounting slot. The fixing block (8) is then released. Due to the action of the spring (11), the fixing block (8) moves downward to fix the motor (5) under test between the fixing block (8) and the base (7).

5. The axial clearance detection device for a micro-motor according to claim 1, characterized in that: The movable frame also includes a limiting rod; the limiting rod is divided into rod A (13) and rod B (14), rod A (13) and rod B (14) are located on the left and right sides of the rotating screw respectively, and the two rods are fixed together with the rotating screw by the mounting plate.

6. The axial clearance detection device for a micro-motor according to claim 1, characterized in that: The movable block (3) has three parallel through holes, and the central through hole has an internal thread, so that the movable block (3) is fitted into the movable frame and the central through hole is engaged with the rotating screw.

7. The axial clearance detection device for a micro-motor according to claim 1, characterized in that: A baffle (12) is provided on one end face of the mounting slot facing the movable frame, and the motor is further fixed and clamped by the baffle (12).

Images