Tool for detecting coaxiality and flatness of motor support

Abstract

The utility model relates to a motor support coaxiality and planeness detection tool, which comprises a support plate, a support fixing plate and a dial indicator, a first plane bearing is fixedly arranged on the support plate, a connecting shaft penetrates through the support plate and the support fixing plate and is in sliding fit with the first plane bearing, and the support fixing plate is rotatably connected with the support plate; a plurality of positioning assemblies are arranged on the support fixing plate and used for positioning to-be-detected motor supports of different models, each positioning assembly comprises a plurality of positioning holes, distribution of the positioning holes is matched with distribution of positioning protruding points of the to-be-detected motor supports of the models corresponding to the positioning assemblies, a pressing plate is arranged above each positioning hole, and the pressing plates are used for pressing the to-be-detected motor supports. The pressing plate is used for further pressing and fixing the positioned to-be-detected motor bracket on the bracket fixing plate; the dial indicator is used for measuring coaxiality data and flatness data of the motor support to be detected. Compared with the prior art, the detection accuracy and comprehensiveness of the motor support can be further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motor bracket detection, in particular to a jig for detecting the coaxiality and flatness of a motor bracket. Background Art

[0002] The motor structure is as follows Figure 6 As shown in the figure, the coaxiality and flatness of the motor bracket are important factors affecting the performance and service life of the motor. Figure 8 As shown, the coaxiality refers to the four positioning protrusions A / A1 of the motor bracket (with Figure 7 The symmetry and position of the stator (corresponding to the stator locating slots in the bearing) relative to the bearing axis. The coaxiality of the motor bracket and the overlap of the stator's A / A1 locating slots relative to the axis determine the motor's performance and service life. Flatness refers to the flatness of the bracket's mounting surface, which directly affects the parallelism of the two mounting plates and the performance of the entire motor.

[0003] For the coaxiality detection of motor brackets, the main equipment on the market currently includes two-dimensional, three-dimensional and image detection, but most of these devices are based on the detection in the natural state after the bracket is formed, which is somewhat different from the actual effect after assembly. This is because the metal stamping parts will have stress deformation during the stretching and bending forming process. Especially when a product has multiple bends, it is impossible to fully achieve the ideal theoretical size in mass production. When the error accumulates to a limit threshold, many qualified products will still have problems after assembly and cannot meet the performance requirements. Chinese patent application 2021109592230 discloses a method and tool for rapid detection of the coaxiality of an assembly stand, which can be used to perform coaxiality detection at any assembly position with the assembly stand. However, in this scheme, the tool sleeve is fixed and locked to the reference input shaft by a flat key and a radial locking screw, which may cause the connection to loosen under high vibration or impact loads, resulting in measurement errors; in addition, the above scheme cannot achieve flatness detection, and the comprehensiveness of the detection needs to be further improved. Therefore, it is necessary to redesign a motor bracket inspection fixture that can simulate the actual state of the motor bracket and stator after assembly, and at the same time can detect the coaxiality and flatness of the two items after one clamping, further improving the accuracy and comprehensiveness of the inspection results. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects of the above-mentioned prior art and provide a motor bracket coaxiality and flatness detection fixture to further improve the accuracy and comprehensiveness of motor bracket detection.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] The utility model provides a jig for detecting the coaxiality and flatness of a motor bracket, which comprises a support plate, a bracket fixing plate and a dial indicator;

[0007] A first plain bearing is fixedly arranged on the support plate. A connecting shaft penetrates through the support plate and the bracket fixing plate and is in sliding fit with the first plain bearing, rotatably connecting the bracket fixing plate and the support plate. Multiple positioning components are arranged on the bracket fixing plate for positioning motor brackets to be detected of different models. Each positioning component comprises multiple positioning holes, and the distribution of the positioning holes matches the distribution of the positioning bumps of the motor bracket to be detected of the corresponding model. A pressing plate is arranged above each positioning hole for further pressing and fixing the motor bracket to be detected after positioning onto the bracket fixing plate. The dial indicator is used for measuring the coaxiality data and flatness data of the motor bracket to be detected. The dial indicator is connected to a universal magnetic base through a universal connecting rod, and the universal magnetic base is fixed on the edge of the support plate.

[0008] Furthermore, one side of the bracket fixing plate close to the support plate is processed by a lathe and a grinding machine to form multiple concentric annular bosses.

[0009] Furthermore, one side of the bracket fixing plate close to the support plate is polished.

[0010] Furthermore, an anti-slip rubber gasket is arranged at the bottom of the support plate.

[0011] Furthermore, the pressing plate is adjusted to be tightened or loosened by screws.

[0012] Furthermore, a buffer gasket is arranged on the surface of the pressing plate in contact with the motor bracket to be detected.

[0013] Furthermore, a height-variable elastic component is arranged between one end of the pressing plate far from the motor bracket to be detected and the bracket fixing plate.

[0014] Furthermore, the elastic component is a spring or elastic rubber.

[0015] Furthermore, the universal connecting rod is sleeved on the universal magnetic base and fixed by a nut.

[0016] Furthermore, the universal magnetic base is fixed on the edge of the support plate through a magnetic switch.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] 1. The utility model designs a coaxiality and flatness detection fixture for a motor bracket, which includes a support plate, a bracket fixing plate and a dial indicator. The bracket fixing plate is rotatably connected to the support plate, and a plurality of positioning components are arranged on the bracket fixing plate, which can position motor brackets to be detected of different models, support the detection of multiple models of brackets, have a wide application range and good economy. Each positioning component includes a plurality of positioning holes, and the distribution of each positioning hole matches the distribution of the positioning bumps of the motor bracket to be detected corresponding to the model of this positioning component. A pressing plate is arranged above each positioning hole, which can further press and fix the motor bracket to be detected after positioning onto the bracket fixing plate. At this time, the positioning hole is equivalent to the positioning groove of the stator, which can make the detection closer to the actual state after the motor bracket and the stator are assembled, accurately detect whether the cumulative error of the bracket after assembly meets the technical requirements, and further improve the accuracy of the detection result.

[0019] 2. When using the fixture designed by the utility model for detection, align the positioning points of the motor bracket to be detected with the positioning holes on the bracket fixing plate and press them tightly. After adjusting the pressing plate and fixing the motor bracket to be detected onto the bracket fixing plate, adjust the position of the dial indicator so that its probe contacts the circumferential surface of the detection shaft. Rotate the bracket fixing plate one week, and the coaxiality data can be read from the dial indicator. After the coaxiality detection is completed, without disassembling and assembling the motor bracket, only need to adjust the position of the dial indicator so that its probe contacts the lowest point of the motor bracket to be detected, then rotate the bracket fixing plate one week, and the flatness data can be read from the dial indicator. The above detection scheme is convenient to operate, and can detect two items of coaxiality and flatness respectively through one clamping, improving the comprehensiveness of the detection result and the detection efficiency while. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the front view of the coaxiality and flatness detection fixture for the motor bracket;

[0021] Figure 2 is the top view of the coaxiality and flatness detection fixture for the motor bracket;

[0022] Figure 3 is the schematic diagram of the bottom surface processing of the bracket fixing plate,

[0023] wherein, (3a) is the front view of the bracket fixing plate, and (3b) is the bottom view of the bracket fixing plate;

[0024] Figure 4 is the schematic diagram of coaxiality detection using the coaxiality and flatness detection fixture for the motor bracket,

[0025] wherein, (4a) is the front view of the fixture during coaxiality detection, and (4b) is the top view of the fixture during coaxiality detection;

[0026] Figure 5Schematic diagram for flatness detection using the coaxiality and flatness detection fixture of the motor bracket

[0027] Among them, (5a) is the front view of the fixture during flatness detection, and (5b) is the top view of the fixture during flatness detection;

[0028] Figure 6 Schematic diagram of the motor component structure;

[0029] Figure 7 Schematic diagram of the stator and rotor structure;

[0030] Figure 8 Schematic diagram of the motor bracket structure;

[0031] Explanation of reference numerals: 1. Support plate; 2. Bracket fixing plate; 3. First plain bearing; 4. Connecting shaft; 5. Pressure plate; 6. Screw; 7. Universal magnetic base; 8. Dial indicator; 9. Detection shaft; 10. Motor bracket to be detected; 11. Spring; 12. Flat washer; 13. Second plain bearing. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0033] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the product of this utility model is normally placed. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0034] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality" means two or more, unless otherwise specifically defined.

[0035] Example:

[0036] This embodiment provides a motor bracket coaxiality and flatness detection fixture, such as Figure 1 As shown, it includes a support plate 1, a bracket fixing plate 2 and a dial indicator 8. A first plane bearing 3 is fixed on the support plate 1, and a connecting shaft 4 passes through the support plate 1 and the bracket fixing plate 2 and slides with the first plane bearing 3 to rotatably connect the bracket fixing plate 2 to the support plate 1.

[0037] The bracket fixing plate 2 is provided with a plurality of positioning components (such as Figure 2 The positioning components (A / A1, B / B1, and C / C1) can be used to locate different types of motor brackets under test, making the fixture widely applicable and economical. Each positioning component includes multiple positioning holes, the distribution of which matches the distribution of the positioning bumps on the corresponding motor bracket under test. A pressure plate 5 is located above each positioning hole to further press the positioned motor bracket under test onto the bracket fixing plate 2. Screws 6 adjust the pressure of the pressure plate 5 to tighten or loosen it.

[0038] In a preferred embodiment, a buffer gasket is provided on the side of the pressure plate 5 that contacts the motor bracket to be tested, which can prevent the motor bracket to be tested from sliding and make the motor bracket to be tested bear force evenly to prevent deformation.

[0039] In a preferred embodiment, a height-variable elastic component is arranged between the end of the pressure plate 5 away from the motor bracket to be tested and the bracket fixing plate 2. The elastic component can be a spring or elastic rubber. This setting can also ensure that the motor bracket to be tested is evenly stressed and more stable during the detection process.

[0040] In a preferred embodiment, the side of the bracket fixing plate 2 close to the support plate 1 is processed by a lathe and a grinder, such as Figure 3 As shown in (3b), the shaded part is retained and the blank part is removed by lathe and grinder to form multiple concentric annular bosses. Figure 3 As shown in (3a), the height of the boss after processing is about 0.5mm. The above setting can reduce the friction between the bracket fixing plate 2 and the support plate 1 when rotating, while ensuring stability during rotation.

[0041] In a preferred embodiment, a surface of the bracket fixing plate 2 close to the support plate 1 is polished to further reduce the measurement error caused by friction resistance.

[0042] In a preferred embodiment, a non-slip rubber pad is provided at the bottom of the support plate 1 to ensure the stability of the fixture during the measurement process.

[0043] The dial indicator 8 is used to measure the coaxiality data and flatness data of the motor bracket to be detected. The dial indicator 8 is connected to the universal magnetic base 7 through a universal connecting rod. The universal connecting rod is sleeved on the universal magnetic base 7 and fixed by a nut. The universal magnetic base 7 is fixed to the edge of the support plate 1 through a magnetic switch.

[0044] The steps for coaxiality detection using the above fixture are as follows:

[0045] S1. As shown in (4a) of Figure 4 , install the second plain bearing 13 in the bearing chamber of the motor bracket 10 to be detected, pass the detection shaft 9 through the second plain bearing 13, slip the spring 11 onto the detection shaft 9, and place a flat washer 12 on the top of the spring 11.

[0046] S2. Align and press the positioning points of the motor bracket 10 to be detected with the positioning holes on the bracket fixing plate 2, and adjust the pressure plate 5 to fix the motor bracket 10 to be detected to the bracket fixing plate 2.

[0047] S3. Adjust the position of the dial indicator 8. As shown in (4b) of Figure 4 , make its probe contact the circumferential surface of the detection shaft 9, rotate the bracket fixing plate 2 one week, confirm that the probe is adjusted in place, and read the coaxiality data from the dial indicator 8.

[0048] The steps for flatness detection are as follows:

[0049] After completing the coaxiality detection, adjust the position of the dial indicator 8. As shown in (5a) and (5b) of Figure 5 , make its probe contact the lowest point of the motor bracket 10 to be detected, rotate the bracket fixing plate 2 one week, confirm that the probe is adjusted in place, and read the flatness data from the dial indicator 8.

[0050] The above fixture can detect two items of coaxiality and flatness respectively through one clamping, with convenient operation and improved detection efficiency. At the same time, the positioning holes on the bracket fixing plate 2 are equivalent to the positioning grooves of the stator, making the detection closer to the actual state after the motor bracket and the stator are assembled, and can accurately detect whether the cumulative error of the motor bracket after assembly meets the technical requirements.

[0051] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A coaxiality and flatness detection fixture for a motor bracket, characterized in that, It includes a support plate (1), a bracket fixing plate (2) and a dial indicator (8). A first plain bearing (3) is fixedly arranged on the support plate (1). A connecting shaft (4) penetrates through the support plate (1) and the bracket fixing plate (2) and is in sliding fit with the first plain bearing (3), rotatably connecting the bracket fixing plate (2) and the support plate (1). Multiple positioning components are arranged on the bracket fixing plate (2) for positioning motor brackets to be detected of different models. Each positioning component includes multiple positioning holes, and the distribution of the positioning holes matches the distribution of the positioning bumps of the motor bracket to be detected of the corresponding model of this positioning component. A pressing plate (5) is arranged above each positioning hole for further pressing and fixing the positioned motor bracket to be detected onto the bracket fixing plate (2). The dial indicator (8) is used to measure the coaxiality data and flatness data of the motor bracket to be detected. The dial indicator (8) is connected to a universal magnetic base (7) through a universal connecting rod, and the universal magnetic base (7) is fixed on the edge of the support plate (1).

2. The coaxiality and flatness detection fixture for a motor bracket according to claim 1, characterized in that, The surface of the bracket fixing plate (2) close to the support plate (1) is processed by a lathe and a grinding machine to form multiple concentric annular bosses.

3. A coaxiality and flatness detection fixture for a motor bracket according to claim 1, characterized in that, The surface of the bracket fixing plate (2) close to the support plate (1) is polished.

4. A coaxiality and flatness detection fixture for a motor bracket according to claim 1, characterized in that, An anti-slip rubber gasket is arranged at the bottom of the support plate (1).

5. The coaxiality and flatness detection fixture for a motor bracket according to claim 1, characterized in that The pressing plate (5) is adjusted to be tightened or loosened by a screw (6).

6. The coaxiality and flatness detection fixture for a motor bracket according to claim 1, wherein A buffer gasket is arranged on the surface of the pressing plate (5) in contact with the motor bracket to be detected.

7. A coaxiality and flatness detection fixture for a motor bracket according to claim 1, characterized in that, An elastic component with variable height is arranged between one end of the pressing plate (5) far from the motor bracket to be detected and the bracket fixing plate (2).

8. A coaxiality and flatness detection fixture for a motor bracket according to claim 7, characterized in that The elastic component is a spring or elastic rubber.

9. A coaxiality and flatness detection fixture for a motor bracket according to claim 1, characterized in that, The universal connecting rod is sleeved on the universal magnetic base (7) and is adjusted and fixed by a nut.

10. A coaxiality and flatness detection fixture for a motor bracket according to claim 1, characterized in that, The universal magnetic base (7) is fixed on the edge of the support plate (1) through a magnetic switch.

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