Motor shell inner diameter rapid testing fixture

Abstract

This utility model discloses a rapid measuring tool for the inner diameter of a motor housing, including a measuring tool body with a frustum structure. The bottom of the measuring tool body is fixedly mounted on a base. An mounting groove is formed along the axial direction of the outer wall of the measuring tool body, and a scale is installed in the mounting groove. The height of the measuring tool body increases by 0.01 mm for every 10-11 mm interval from top to bottom. The scale marks the outer diameter of the measuring tool body at corresponding positions. The motor housing to be tested is fitted onto the outer circumference of the measuring tool body. This utility model uses a scale on the measuring tool body. After the motor housing is fitted into place, the inner diameter of the motor housing can be obtained by comparing the position of the bottom surface of the motor housing with the dimensions marked on the scale. The measurement time can be controlled within 1 minute, resulting in high measurement efficiency. Furthermore, it avoids the problem of large measurement errors caused by deformation of the motor housing during measurement, resulting in high measurement accuracy.

Description

Technical Field

[0001] This utility model relates to the technical field of motor testing equipment. More specifically, this utility model relates to a quick inspection tool for the inner diameter of a motor housing. Background Technology

[0002] The motor housing is a thin-walled cylindrical part with an inner diameter of 140mm (+0.06 / -0.04), a height of 100-150mm, and a wall thickness of 1.5mm. Currently, the inner diameter of the motor housing is usually measured using an inside micrometer. During measurement, the operator needs to insert the measuring tool deep into the motor housing and repeatedly fine-tune it by hand to find the position of the hole diameter. This process is time-consuming, taking up to 5 minutes to complete a single measurement, resulting in low measurement efficiency. Summary of the Invention

[0003] Another objective of this invention is to provide a rapid measuring tool for the inner diameter of motor housings that offers high measurement efficiency and accuracy.

[0004] In order to achieve these objectives and other advantages according to the present invention, a quick measuring tool for the inner diameter of a motor housing is provided, including a measuring tool body, which is a frustum structure. The bottom of the measuring tool body is fixedly mounted on a base. An installation groove is provided on the outer side wall of the measuring tool body along its axial direction, and a scale is installed in the installation groove.

[0005] The height of the fixture body increases by 0.01 mm for every 10-11 mm interval from top to bottom. The outer diameter of the fixture body is marked on the scale at the corresponding position. The motor housing to be tested is fitted around the outer periphery of the fixture body.

[0006] Preferably, the outer periphery of the inspection fixture body is provided with a material ejection ring.

[0007] Preferably, the ejector ring is slidably sleeved on the fixture body via a sliding assembly; the sliding assembly includes a plurality of guide rails spaced apart along the circumference of the fixture body, and a plurality of sliding keys correspondingly disposed on the inner sidewall of the ejector ring, any one of the guide rails being embedded in the outer sidewall of the fixture body along the axial direction of the fixture body, and the sliding key being slidably disposed on the guide rail.

[0008] Preferably, a plurality of cylinders are mounted on the top surface of the base, which are symmetrically arranged on both sides of the inspection fixture body. The fixed end of any cylinder is fixed on the base, and the free end faces the bottom of the ejector ring.

[0009] Preferably, a slider is slidably disposed in the mounting groove, the outer circumference of the slider being adapted to the shape of the groove on the motor housing to be tested, and a digital identifier is embedded in the bottom surface of the slider, the digital identifier being used to read the dimensional data on the scale; a display screen is disposed on the fixture body, and the digital identifier is electrically connected to the display screen to transmit the read dimensional data to the display screen.

[0010] Preferably, a rubber ring is provided at the contact point between the outer periphery of the slider and the groove of the motor housing to be tested.

[0011] Preferably, a protective gasket is provided on the top surface of the ejector ring.

[0012] This utility model has at least the following beneficial effects: By installing a scale on the outer wall of the fixture body, during measurement, the operator puts the motor housing onto the fixture body, then presses down on the motor housing, causing it to move downwards along the axis of the fixture body until it can no longer move. By using the dimension data marked on the scale corresponding to the position of the bottom surface of the motor housing, the inner diameter of the motor housing can be obtained. The measurement time can be controlled within 1 minute, resulting in high measurement efficiency. Furthermore, it avoids the problem of large measurement errors caused by deformation of the motor housing during the measurement process, thus improving measurement accuracy.

[0013] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of the quick inspection tool for the inner diameter of the motor housing according to this utility model;

[0015] Figure 2 This is a cross-sectional view of the quick inspection tool for the inner diameter of the motor housing according to this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the inspection tool body of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the scale of this utility model;

[0018] Figure 5 This is a schematic diagram of the motor housing structure;

[0019] Explanation of reference numerals on the accompanying drawings:

[0020] 1. Base, 2. Inspection fixture body, 3. Mounting slot, 4. Scale, 5. Unloading ring, 6. Guide rail, 7. Sliding key block, 8. Cylinder, 9. Slider, 10. Motor housing, 11. Groove. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0022] It should be noted that in the description of this utility model, the terms "horizontal", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not 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.

[0023] like Figure 1-5 As shown, this utility model provides a quick inspection tool for the inner diameter of a motor housing, including a tool body 2, which is a frustum structure. The bottom of the tool body 2 is fixedly installed on a base 1. An installation groove 3 is provided on the outer side wall of the tool body 2 along its axial direction. A scale 4 is installed in the installation groove 3.

[0024] The height of the inspection fixture body 2 increases by 0.01 mm for every 10-11 mm interval from top to bottom. The outer diameter of the inspection fixture body 2 is marked on the scale 4 at the corresponding position. The motor housing 10 to be inspected is fitted around the outer periphery of the inspection fixture body 2.

[0025] In the above technical solutions, such as Figure 1-3 As shown, the fixture body 2 is a truncated cone, larger at the bottom and smaller at the top, formed by grinding. The outer diameter of the top surface of the fixture body 2 is slightly smaller than the minimum limit size of the motor housing. The fixture body 2 can be welded to the base 1, which improves the stability of the fixture body 2 during use. A scale 4 is installed on the outer wall of the fixture body 2 through the mounting groove 3. Bolt holes are opened at both ends of the mounting groove 3 and the two ends of the scale 4. The scale 4 is embedded in the mounting groove 3 through bolts and bolt holes. During measurement, the operator puts the motor housing 10 onto the fixture body 2 and then presses down on the motor housing 10, moving it down along the axis of the fixture body 2 until it can no longer move. The inner diameter of the motor housing 10 can be obtained by using the dimension data marked on the scale 4 corresponding to the position of the bottom surface of the motor housing 10. The measurement time can be controlled within 1 minute, which is highly efficient. Moreover, the measurement can avoid the problem of large measurement errors caused by the deformation of the motor housing 10 during the measurement process, resulting in high measurement accuracy.

[0026] To ensure that the bottom surface of the motor housing 10 corresponds to the dimension marked on the scale 4 after it is pressed down, thus guaranteeing measurement accuracy, the spacing between the outer diameter dimensions marked on the scale 4 needs to be as small as possible. However, the dimensions marked will occupy a certain amount of space. If the spacing is too small, the dimensions marked will be difficult to see. If the spacing is too large, there may be a situation where the motor housing 10 is pressed down but the corresponding position on the scale 4 is not marked, which cannot guarantee measurement accuracy. In addition, a large spacing will also increase the length of the fixture body 2, increasing the cost. Therefore, after multiple experiments, it was determined that a dimension is marked on the scale 4 every 10-11 mm. This ensures that the operator can see the marked dimensions, guarantees measurement accuracy, and does not increase the length of the fixture body 2, thus increasing manufacturing costs.

[0027] In another technical solution, a material ejection ring 5 is fitted around the outer periphery of the inspection fixture body 2.

[0028] In this technical solution, we found in practical application that after the measurement is completed, the motor housing 10 will be firmly stuck on the fixture body 2, and the outer surface of the motor housing 10 is smooth, making it inconvenient for operators to remove the motor housing 10. In order to facilitate the removal of the motor housing 10 and improve the detection efficiency, a material ejection ring 5 is fitted on the fixture body 2, and the material ejection ring 5 is located below the motor housing 10. When it is necessary to remove the motor housing 10, the operator taps the bottom surface of the material ejection ring 5, causing the material ejection ring 5 to move upward along the axial direction of the fixture body 2 until it contacts the bottom surface of the motor housing 10. The operator continues to tap the material ejection ring 5, and the tapping force is transmitted to the motor housing 10 through the material ejection ring 5, gradually pushing the motor housing 10 out of the fixture body 2. The inner circumference of the material ejection ring 5 is set to have the same taper as the fixture body 2.

[0029] In another technical solution, the ejector ring 5 is slidably sleeved on the fixture body 2 via a sliding assembly; the sliding assembly includes a plurality of guide rails 6 spaced apart along the circumference of the fixture body 2, and a plurality of sliding key blocks 7 correspondingly disposed on the inner sidewall of the ejector ring 5, any one of the guide rails 6 is embedded in the outer sidewall of the fixture body 2 along the axial direction of the fixture body 2, and the sliding key block 7 is slidably disposed on the guide rail 6.

[0030] In this technical solution, we found in practical application that if the ejector ring 5 is directly fitted onto the fixture body 2, when the operator strikes the ejector ring 5, the ejector ring 5 will tilt and get stuck on the fixture body 2 due to the offset caused by the striking force. The operator needs to use greater striking force and increase the number of strikes to move the ejector ring 5 again, resulting in low ejection efficiency. To improve the ejection efficiency of the motor housing 10, such as... Figure 2As shown, a sliding component is provided between the fixture body 2 and the ejector ring 5. The friction between the ejector ring 5 and the fixture body 2 is reduced by sliding connection. The ejector ring 5 can be driven to move upward with a small impact force. When the ejector ring 5 moves upward, it will move along the guide rail 6 to avoid the ejector ring 5 tilting and getting stuck on the fixture body 2.

[0031] In another technical solution, a plurality of cylinders 8 are mounted on the top surface of the base 1, which are symmetrically arranged on both sides of the inspection fixture body 2. The fixed end of any cylinder 8 is fixed on the base 1, and the free end faces the bottom of the ejector ring 5.

[0032] In this technical solution, material is ejected by the operator striking the ejection ring 5. This method involves high workload for the operator. To reduce this workload, as follows: Figure 2 As shown, two cylinders 8 are symmetrically arranged on the base 1. The cylinders 8 are welded to the base 1. The lifting action of the cylinders 8 replaces the manual knocking of the ejector ring 5. During the diameter measurement of the motor housing 10, the free end of the cylinder 8 is retracted to a position that does not affect the measurement of the inner diameter of the motor housing 10. After the measurement is completed, the operator controls the free end of the cylinder 8 to extend and contact the bottom of the ejector ring 5 and continue to lift it upward, driving the ejector ring 5 to move along the setting direction of the guide rail 6 until it contacts the motor housing 10, so as to indirectly apply the lifting force to the motor housing 10 and gradually push the motor housing 10 out of the inspection fixture body 2.

[0033] In another technical solution, a slider 9 is slidably disposed in the mounting groove 3. The outer circumference shape of the slider 9 is adapted to the shape of the groove 11 on the motor housing 10 to be tested. A digital identifier is embedded in the bottom surface of the slider 9. The digital identifier is used to read the size data on the scale 4. A display screen is disposed on the fixture body 2. The digital identifier is electrically connected to the display screen to transmit the read size data to the display screen.

[0034] In this technical solution, the inner diameter of the motor housing 10 is obtained by fitting the motor housing 10 onto the fixture body 2 and having the operator observe the dimensions marked on the scale 4 corresponding to the position of the bottom surface of the motor housing 10. While this improves inspection efficiency, manual reading is still required, which is prone to visual errors. To improve inspection accuracy, a slider 9, matching the shape of the groove 11 of the motor housing 10, is slidably installed in the mounting groove 3. A digital reader is embedded in the bottom surface of the slider 9, and the effective reading position of the digital reader is precisely aligned with the bottom surface of the groove 11. The data on the scale 4 is read by the digital reader. A display screen is embedded in the lower part of the outer wall of the fixture body 2 to display the inner diameter data read by the digital reader. The operator only needs to check the display screen to know the inner diameter of the motor housing 10, eliminating the need for manual reading. The digital reader uses a digital sensor, and its signal output terminal is connected to the signal input terminal of the display screen via a signal line.

[0035] The scale 4 can be embedded in the bottom of the mounting groove 3. Guide rails are symmetrically embedded on the two inner side walls near the opening of the mounting groove 3. The slider 9 is slidably mounted on the guide rails on both sides. To ensure the accuracy of the data reading by the digital recognizer, a ball can be set at one end of the slider 9 near the scale 4. During the sliding process of the slider 9, the ball moves on the scale 4, thereby ensuring the stability of the relative position between the digital recognizer and the scale 4 and ensuring the reading accuracy.

[0036] The procedure for using the inspection tool is as follows:

[0037] Before measurement, the free end of cylinder 8 is in the retracted state. The operator first puts the motor housing 10 onto the fixture body 2, then moves the slider 9 to lock it in the groove 11 of the motor housing 10, and presses down on the motor housing 10 so that it moves down along the axis of the fixture body 2 until it can no longer move (or the motor housing 10 can be moved into place first, and then the slider 9 can be locked in the groove 11). The digital reader reads the dimension data of the corresponding position on the scale 4 and displays it on the display screen. The operator can obtain the inner diameter of the motor housing 10 by checking the display screen. Then the operator controls the free end of cylinder 8 to extend and drive the ejector ring 5 to move upward to apply a lifting force to the motor housing 10, pushing the motor housing 10 out of the fixture body 2. The operator removes the motor housing 10, and the free end of the lifting cylinder retracts. Thus, the inner diameter measurement of the motor housing 10 is completed.

[0038] In another technical solution, a rubber ring is provided at the contact point between the outer periphery of the slider 9 and the groove 11 of the motor housing 10 to be tested.

[0039] In this technical solution, by attaching a rubber ring to the outer periphery of the slider 9, the firmness of the slider 9 when it is engaged with the groove 11 of the motor housing 10 can be improved.

[0040] In another technical solution, a protective gasket is provided on the top surface of the ejector ring 5.

[0041] In this technical solution, the protective gasket is attached to the top surface of the ejector ring 5. The protective gasket is used to prevent the ejector ring 5 from making hard contact with the bottom surface of the motor housing 10, which would cause the motor housing 10 to deform.

[0042] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A fast detection tool for the inner diameter of a motor shell, characterized in that, The fixture includes a body, which is a frustum structure. The bottom of the fixture body is fixedly mounted on a base. An installation groove is provided on the outer side wall of the fixture body along its axial direction, and a scale is installed in the installation groove. The height of the fixture body increases by 0.01 mm for every 10-11 mm interval from top to bottom. The outer diameter of the fixture body is marked on the scale at the corresponding position. The motor housing to be tested is fitted around the outer periphery of the fixture body.

2. The motor shell inner diameter rapid detection device according to claim 1, wherein, The outer periphery of the inspection fixture body is fitted with a material ejection ring.

3. The motor shell inner diameter rapid detection device according to claim 2, wherein, The ejector ring is slidably fitted onto the fixture body via a sliding assembly; the sliding assembly includes a plurality of guide rails spaced apart along the circumference of the fixture body, and a plurality of sliding keys correspondingly disposed on the inner sidewall of the ejector ring, any one of the guide rails being embedded in the outer sidewall of the fixture body along the axial direction of the fixture body, and the sliding key being slidably disposed on the guide rail.

4. The motor shell inside diameter quick detection device of claim 2, wherein, Multiple cylinders are mounted on the top surface of the base and are symmetrically arranged on both sides of the gauge body. The fixed end of any cylinder is fixed on the base, and the free end faces the bottom of the ejector ring.

5. The motor shell inside diameter quick gauge of claim 1, wherein, A slider is slidably disposed in the mounting groove. The outer circumference of the slider is adapted to the shape of the groove on the motor housing to be tested. A digital identifier is embedded in the bottom surface of the slider. The digital identifier is used to read the dimensional data on the scale. A display screen is provided on the fixture body. The digital identifier is electrically connected to the display screen to transmit the read dimensional data to the display screen.

6. The motor shell inside diameter quick detection device of claim 5, wherein, A rubber ring is provided at the contact point between the outer periphery of the slider and the groove of the motor housing to be tested.

7. The quick inspection tool for the inner diameter of the motor housing as described in claim 2, characterized in that, A protective gasket is provided on the top surface of the ejector ring.

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