Pneumatic precision measuring equipment

Abstract

The utility model relates to a pneumatic precision measuring device comprising a rotary table used for fixing a motor housing, and the rotary table is provided with a pneumatic clamp; a lifting table is arranged on the rotary table; the lifting platform is connected with the pneumatic lifting mechanism; a left sliding table and a right sliding table are oppositely arranged at the bottom of the lifting table; the left sliding table and the right sliding table are respectively contacted with or separated from the outer wall of the motor shell; and distance measuring elements are arranged between the left sliding table and the lifting table and between the right sliding table and the lifting table. A to-be-detected workpiece of the motor shell is placed on the rotary table and is tensioned from inside to outside through a pneumatic clamp, so that the motor shell can be fixed on the rotary table; then, the lifting table moves downwards, at the moment, rollers on a left sliding table and a right sliding table on the lifting table will make contact with the top end of the motor shell, the left sliding table and the right sliding table will be pushed to the opposite directions along with continuous descending of the lifting table, and the displacement distance of the left sliding table and the displacement distance of the right sliding table will be measured by the distance measuring element.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of measuring equipment, specifically to a kind of pneumatic precision measuring equipment, belong to motor measuring equipment technical field. BACKGROUND

[0002] Motor shell is usually formed by casting, and the product size may not meet the standard due to the mold during the casting process. When the size and flatness of the motor shell exceed the error range, it will have a great impact on the normal use of the electrode, such as its heat dissipation performance, stability, etc. Therefore, the motor shell needs to be sampled before use. In the prior art, the detection of the motor shell usually uses an optical distance measuring method to measure the outer diameter of a certain point on the shell. This method does not cover a comprehensive range. If the shell surface is uneven and has poor consistency, even if the outer diameter at a certain point meets the standard, the size may still be too small due to unevenness at other positions. Therefore, further improvement is needed. SUMMARY

[0003] The utility model aims at solving the above-mentioned shortcomings and providing a pneumatic precision measuring device with a wider coverage, a more comprehensive measurement range, and more representative measurement data, as well as a simple and reasonable structure.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows:

[0005] A pneumatic precision measuring device includes a rotary table for fixing a motor shell, a pneumatic clamp is provided on the rotary table, a lifting table is provided on the rotary table, the lifting table is connected to a pneumatic lifting mechanism, a left sliding table and a right sliding table are provided at the bottom of the lifting table, the left and right sliding tables are in contact with or separated from the outer wall of the motor shell, and a distance measuring element is provided between the left and right sliding tables and the lifting table.

[0006] Further, a cavity is formed in the rotary table, a guide groove is formed on the surface of the rotary table and communicates with the cavity, the pneumatic clamp includes a first cylinder provided in the cavity, a contact block is connected to the piston of the first cylinder, and a push rod is further included in the pneumatic clamp.

[0007] Further, the push rod is slidably arranged in the guide groove, a wedge block is provided at the end of the push rod, the contact block and the wedge block abut each other, a tension block is provided at the other end of the push rod relative to the wedge block, and the tension block abuts against the inner wall of the motor shell.

[0008] Further, the rotary table is arranged on the base; the base is provided with a guide column; the lifting platform is arranged on the guide column; the pneumatic lifting mechanism comprises a top plate arranged on the top of the guide column; a second air cylinder is arranged on the top plate; the piston of the second air cylinder penetrates the top plate and is connected with the lifting platform.

[0009] Further, the lifting plate is provided with a center through hole; the left sliding table and the right sliding table are symmetrically arranged in the center through hole; the two inner side walls of the center through hole are provided with insertion grooves; the left sliding table and the right sliding table are slidably connected in the insertion grooves through springs.

[0010] Further, the left sliding table and the right sliding table are provided with rollers at the other ends of the springs; the distance measuring element comprises a sleeve arranged in the insertion groove; the end of the sleeve is elastically connected with a magnetic steel; the sleeve is provided with a Hall element; the magnetic steel is in contact with the left sliding table and the right sliding table.

[0011] The utility model has the following beneficial effects: the motor shell workpiece to be detected is placed on the rotary table, and is clamped from inside to outside through the pneumatic clamp, so that the motor shell can be fixed on the rotary table; then, the lifting platform moves downward, at this time, the rollers on the left sliding table and the right sliding table on the lifting platform will be in contact with the top end of the motor shell, with the continuous descending of the lifting platform, the left sliding table and the right sliding table will be pushed to the opposite direction, and the displacement distance of the left sliding table and the right sliding table will be measured by the distance measuring element, and then the original distance before the displacement of the left sliding table and the right sliding table is added, so that the outer diameter data of the motor shell can be obtained; at the same time, the lifting platform can continue to descend, so that the rollers are attached to the surface of the motor shell and move, if the motor shell is flat, the horizontal position of the left sliding table and the right sliding table does not change, and the value measured by the distance measuring element does not change; if the flatness of the surface of the motor shell changes, the left sliding table or the right sliding table will move horizontally, and the distance measuring element can know the displacement change condition, and then the uneven condition of the surface of the motor shell can be known. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is a structural schematic view of the utility model.

[0013] Fig. 2 It is a partial structural schematic view of the lifting platform.

[0014] Fig. 3 It is a structural schematic view of the pneumatic clamp.

[0015] In the figure: 1 is motor housing, 2 is rotary table, 3 is lifting platform, 4 is left sliding platform, 5 is right sliding platform, 6 is first cylinder, 7 is contact block, 8 is push rod, 9 is wedge block, 10 is tension block, 11 is base, 12 is guide column, 13 is top plate, 14 is second cylinder, 15 is roller, 16 is sleeve, 17 is magnetic steel, 18 is Hall element. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0017] The terms used herein, including technical and scientific terms, have the same meanings as the terms generally understood by those skilled in the art, unless the terms are differently defined. It should be understood that the terms defined in commonly used dictionaries have meanings consistent with the meanings of the terms in the art.

[0018] Referring to Figs. 1-3

[0019] A kind of pneumatic precision measuring equipment, including rotary table 2 for fixing motor housing 1, the rotary table 2 is provided with pneumatic clamp;The rotary table 2 is provided with lifting platform 3;The lifting platform 3 is connected with pneumatic lifting mechanism;The bottom of the lifting platform 3 is oppositely provided with left sliding platform 4 and right sliding platform 5;The left sliding platform 4 and right sliding platform 5 are contacted or separated with the outer wall of motor housing 1 respectively;Distance measuring element is arranged between the left sliding platform 4 and right sliding platform 5 and lifting platform 3.

[0020] Further, the rotary table 2 is provided with a cavity, the rotary table 2 is provided with a guide groove communicated with the cavity, the pneumatic clamp includes a first cylinder 6 arranged in the cavity, the piston of the first cylinder 6 is connected with a contact block 7, and the pneumatic clamp further includes a push rod 8.

[0021] Further, the push rod 8 is slidably arranged in the guide groove, the end of the push rod 8 is provided with a wedge block 9, the contact block 7 and the wedge block 9 abut each other, the other end of the push rod 8 relative to the wedge block 9 is provided with a tension block 10, and the tension block 10 abuts against the inner wall of the motor housing 1.

[0022] Specifically, in the embodiment, the first cylinder 6 is pneumatic, pushes the contact block 7 upward, so that the contact block 7 is in contact with the wedge block 9, and drives the two push rods 8 to move toward each other; the push rod 8 is elastically arranged in the guide groove, and the elastic connection mode can be that protrusions are arranged on both sides of the push rod 8, a groove is arranged on the inner wall of the guide groove, the protrusions are arranged in the groove, and the spring connection protrusion mode is arranged in the groove, or other modes can be used; since the elastic connection modes are various and very common, details are not described herein.

[0023] Further, the rotary table 2 is arranged on the base 11; the base 11 is provided with a guide column 12; the lifting table 3 is arranged on the guide column 12; the pneumatic lifting mechanism comprises a top plate 13 arranged at the top of the guide column; and further comprises a second cylinder 14; the second cylinder 14 is arranged on the top plate 13; the piston of the second cylinder 14 penetrates the top plate 13 and is connected with the lifting table 3.

[0024] In the embodiment, the lifting of the lifting table 3 by the second cylinder 14 enables the lower motor housing workpiece to be in contact with the left sliding table 4 and the right sliding table 5 on the lifting table 3, and the specific working principle is as follows:

[0025] Further, the lifting table 3 is provided with a central through hole; the left sliding table 4 and the right sliding table 5 are symmetrically arranged in the central through hole; two inner side walls of the central through hole are provided with insertion slots; and the left sliding table 4 and the right sliding table 5 are slidably connected in the insertion slots by springs.

[0026] In the embodiment, the left sliding table 4 and the right sliding table 5 are slidably connected in the insertion slots, can be extended out of the insertion slots or inserted into the insertion slots, and are provided with springs in the insertion slots, the springs being connected with the left sliding table 4 and the right sliding table 5; the insertion slots are arranged on the two opposite side walls of the central through hole. When the motor housing has not contacted the left sliding table 4 and the right sliding table 5, the left sliding table 4 and the right sliding table 5 are in a natural initial state under the action of the springs; with the rising of the motor housing, the left sliding table 4 and the right sliding table 5 are driven to move toward each other by contacting the rollers.

[0027] Further, the left sliding table and the right sliding table are provided with rollers 15 at the other ends of the springs; the distance measuring element comprises a sleeve 16 arranged in the insertion slot; the sleeve 16 is elastically connected with a magnetic steel 17 at the end; the sleeve 16 is provided with a Hall element 18; and the magnetic steel is in contact with the left sliding table 4 and the right sliding table 5.

[0028] When the left sliding table and the right sliding table are pushed to move towards each other, the left sliding table 4 and the right sliding table 5 will drive the magnetic steel 17, so that the interval of the magnetic steel 17 and the Hall element 18 changes, the Hall element 18 can know the change of the magnetic field, the controller can calculate the displacement data according to the change parameter of the Hall element 18, judge the translation length of the left sliding table 4 or the right sliding table 5, and then combine the initial interval of the left sliding table 4 and the right sliding table 5, so as to know the outer diameter of the shell.

[0029] Finally, it should be pointed out that the above embodiments are only for illustrating the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A pneumatic precision measuring device, comprising a rotary table for fixing a motor housing, characterized in that: A pneumatic clamp is provided on the rotary table; a lifting platform is provided on the rotary table; the lifting platform is connected to a pneumatic lifting mechanism; a left sliding platform and a right sliding platform are provided opposite to each other at the bottom of the lifting platform; the left sliding platform and the right sliding platform are in contact with or separated from the outer wall of the motor housing, respectively; a distance measuring element is provided between the left sliding platform, the right sliding platform and the lifting platform.

2. The pneumatic precision measuring device according to claim 1, characterized in that: The rotary table has a chamber inside; the rotary table surface has a guide groove communicating with the chamber; the pneumatic clamp includes a first cylinder disposed inside the chamber; a contact block is connected to the piston of the first cylinder; the pneumatic clamp also includes a push rod.

3. The pneumatic precision measuring device according to claim 2, characterized in that: The push rod is slidably disposed in the guide groove; a wedge is provided at the end of the push rod; the contact block and the wedge abut against each other; a tensioning block is provided at the other end of the push rod opposite the wedge; the tensioning block abuts against the inner wall of the motor housing.

4. The pneumatic precision measuring device according to claim 1, characterized in that: The rotary table is mounted on the base; the base is provided with a guide column; the lifting platform is mounted on the guide column; the pneumatic lifting mechanism includes a top plate mounted on the top of the guide column; and also includes a second cylinder; the second cylinder is mounted on the top plate; the piston of the second cylinder passes through the top plate and is connected to the lifting platform.

5. A pneumatic precision measuring device according to claim 4, characterized in that: The lifting platform has a central through hole; the left and right sliding platforms are symmetrically arranged in the central through hole; the two inner sidewalls of the central through hole are provided with slots; the left and right sliding platforms are slidably connected to the slots by springs.

6. A pneumatic precision measuring device according to claim 5, characterized in that: The left and right sliding platforms are equipped with rollers at the other end of the opposing springs; the ranging element includes a sleeve disposed in a slot; a magnet is elastically connected to the end of the sleeve; a Hall element is disposed inside the sleeve; the magnet is in contact with the left and right sliding platforms.

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