CN109115087B - Blind hole bottom assembly clearance detection device - Google Patents
Blind hole bottom assembly clearance detection device Download PDFInfo
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- CN109115087B CN109115087B CN201811093843.5A CN201811093843A CN109115087B CN 109115087 B CN109115087 B CN 109115087B CN 201811093843 A CN201811093843 A CN 201811093843A CN 109115087 B CN109115087 B CN 109115087B
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- 238000001514 detection method Methods 0.000 title claims abstract description 34
- 238000003825 pressing Methods 0.000 claims abstract description 100
- 238000009434 installation Methods 0.000 claims abstract description 8
- 230000006835 compression Effects 0.000 claims description 36
- 238000007906 compression Methods 0.000 claims description 36
- 238000005259 measurement Methods 0.000 claims description 14
- 230000009347 mechanical transmission Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 9
- 238000005299 abrasion Methods 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/14—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention relates to a part assembly clearance detection device, which comprises a pressing device, a positioning device and a measuring device, wherein the three devices are mutually matched, so that the clearance between a conductive shaft and the bottom of a blind hole of a protection cylinder can be visually displayed, and can be measured by a conventional measuring instrument, the problems of repeated trial assembly, file repair, unstable quality caused by incapability of detection and the like are avoided in the assembly process, the detection cost is reduced, and the product assembly and detection efficiency is improved by more than 80%; the measuring device has the advantages of small volume, light weight, accurate installation and positioning, reliable tightening, and clear measured value; the device not only can be used as a necessary tool for assembly site and product detection, but also is convenient to carry, can be used as after-sales service detection equipment, and is convenient for detecting the problems of abrasion and the like in the working process of products.
Description
Technical Field
The invention belongs to the field of mechanical manufacturing detection, and relates to a portable detection device which is particularly suitable for detecting specific numerical values of assembly gaps at the bottom of a blind hole.
Background
In the assembly of a certain product, the conductive shaft 21 and the conductive rod 22 are all electric conductive parts with insulating materials wrapped outside metal materials, when in operation, external force is applied to the conductive shaft 21, the conductive rod 22 can move up and down in the protective cylinder 23, and the working position, the on-off state and the on-off state of the conductive shaft 21 can be controlled through the up-down movement of the conductive rod 22.
When the product works normally, the conductive rod 22 is positioned at the upper part of the protection cylinder 23, and when the conductive rod is not inserted into the right hole of the conductive shaft 21, the conductive shaft 21 is tightly contacted with the bottom of the blind hole of the protection cylinder 23 under the action of external force, and the gap is zero; when the conducting rod moves downwards to be inserted into the right hole of the conducting shaft 21, the conducting rod 22 drives the conducting shaft 21 to displace leftwards, so that a gap is formed between the right end of the conducting shaft 21 and the bottom of the blind hole of the protection cylinder 23, the product design requires that the gap be 0.1mm, the conducting shaft 21 and the protection cylinder 23 are in a separated state, and the conducting rod 22 conducts working current through the conducting shaft 21. If the gap is too small, conduction faults can be caused; if it is too large, the conductive rod 22 cannot pass through the circular hole in the middle of the conductive shaft 21 smoothly when moving up and down, resulting in control failure.
Since the prior factory has no similar detection device or equipment, whether the clearance value meets the 0.1mm of the design requirement of the product can not be determined, and the clearance value can only be ensured by accurate operation in the part machining process after theoretical calculation, but the quality of the product is always unstable due to the existence of the machining error of the part of the product, and conductive faults or control faults frequently occur. Therefore, detecting whether the assembly gap meets the design requirement is a technical problem to be solved.
Disclosure of Invention
The invention solves the technical problems that: in order to solve the defects in the prior art, whether the gap between the assembled conductive shaft 21 and the bottom of the blind hole of the protection cylinder 23 meets the design requirement or not is detected, the invention provides a detection device which comprises a pressing device, a positioning device and a measuring device, wherein the protection cylinder 23 is fixed firstly when in use, then the working states of the tested conductive shaft 21 and the conductive rod 22 in the protection cylinder 23 are simulated, and the accurate value of the assembly gap is intuitively and simply measured by displacement transmission by using a dial indicator, so that the problems of repeated trial assembly and file repair in the assembly process, unstable quality caused by incapability of detection and the like are avoided.
The technical scheme of the invention is as follows: the part assembly clearance detection device comprises a bottom plate, a pressing assembly, a positioning assembly and a measuring assembly, wherein the measuring assembly, the positioning assembly and the pressing assembly are sequentially arranged on the bottom plate from one end of the bottom plate; the component to be tested comprises a conductive rod, a protection cylinder and a conductive shaft; the pressing component is used for pressing and fixing the protection cylinder, the positioning component is used for positioning the conductive rod and the conductive shaft during measurement, and the measuring component is used for measuring the gap between the conductive shaft and the protection cylinder.
The measuring assembly comprises a dial indicator seat, an adjusting screw, a sleeve and a dial indicator, wherein the dial indicator seat is fixedly connected to the leftmost end of the bottom plate, a feeler lever of the dial indicator is inserted into the dial indicator seat, the inserted end is sleeved into the sleeve, and the pressing is carried out through the adjusting screw (19); the position of the dial indicator is adjusted by adjusting the tightness of the adjusting screw;
the positioning assembly comprises a push rod, a handle, a spring seat, a spring baffle and a first positioning block; the first positioning block is fixedly connected to the bottom plate, the spring seat is fixedly connected to the first step surface of the bottom plate, a semicircular clamping groove is formed in one side, close to the dial indicator seat, of the spring seat, and the axis of the clamping groove is perpendicular to the axis of the spring seat; one end of the ejector rod is contacted with the end head of the dial indicator feeler lever, and the other end of the ejector rod is sleeved into a spring and then inserted into a spring seat to be connected with a spring baffle; one end of the ejector rod is in threaded connection with one end of the handle, and the other end of the ejector rod is connected with the spring baffle; when not measured, the side wall of the handle is not positioned in the semicircular clamping groove, and when measured, the handle is positioned in the semicircular clamping groove; one end of the conductive shaft is inserted into the protection cylinder, and the other end extends out of the protection cylinder and is in close contact with the ejector rod during measurement;
the pressing component comprises a main pressing part and a side pressing part, wherein the main pressing part comprises a second positioning block, a hook-shaped pressing plate, a double-end stud and a pressing spring; the second positioning block is fixedly connected above the round hole at the rightmost end of the bottom plate, the spring is positioned in the hook-shaped pressing plate, and the spring and the hook-shaped pressing plate are integrally inserted into the columnar hole in the middle of the second positioning block; the second positioning block is arranged in a hole of the bottom plate, and the hook-shaped pressing plate of the second positioning block is inserted into the double-end stud and penetrates through the spring; the lower part of the double-end stud is fixedly connected with the bottom plate, the hexagonal nut is screwed in the upper part of the double-end stud, the hexagonal nut rotates upwards, and the hook-shaped pressing plate is in a free state, so that the double-end stud can flexibly rotate left and right and can flexibly move up and down; the side compression part comprises a compression screw and a third positioning block, the third positioning block is fixedly connected to the right end of the bottom plate and forms a 30-degree position with the axis of the bottom plate, the compression screw is screwed in from a screw hole on the side face of the third positioning block, and the compression screw is rotated to adjust the placement position of a part to be measured.
The invention further adopts the technical scheme that: the end, far away from the installation dial indicator, of the bottom plate is provided with a through hole and a step hole respectively, the first positioning block is installed on the through hole and is in interference fit with the hole on the bottom plate, the first positioning block is of a step shaft-shaped structure, the small end of the first positioning block is inserted into the through hole on the bottom plate, one side surface of the large end of the first positioning block is longitudinally provided with a rectangular tangential surface, the tangential surface is parallel to the end surface of the spring seat 5, and the protection cylinder is placed on the first positioning block; the second positioning block is arranged on the step hole and is fixedly connected with the bottom plate through a screw and a taper pin, and the axis of the middle cylindrical hole is coincident with the axis of the step hole on the bottom plate.
The invention further adopts the technical scheme that: the conducting rod is positioned at the upper part of the protection cylinder, the conducting shaft is inserted into a blind hole formed in the side wall of the protection cylinder, the axis of the conducting shaft is mutually perpendicular to the axis of the protection cylinder, and at the moment, the gap between the conducting shaft and the bottom of the blind hole of the protection cylinder under the action of external force is zero; when the conductive rod moves downwards along the axis, the conductive rod is inserted into the right hole of the conductive shaft, and the axis of the right hole is not coincident with the axis of the conductive shaft; the conductive rod drives the conductive shaft to move away from the bottom of the blind hole of the protection cylinder, so that a gap is generated, and a gap value is detected through mechanical transmission of the conductive shaft and the ejector rod.
The invention further adopts the technical scheme that: the whole first positioning block is a two-stage columnar body, the small end of the first positioning block can be inserted into a positioning through hole at the second step of the bottom plate 1, and the middle part of the large end of the first positioning block is provided with a central hole along the axis for installing a part to be tested; a rectangular tangential plane is longitudinally arranged on one side surface of the large end of the spring seat, and the tangential plane is parallel to the end surface of the spring seat 5.
The invention further adopts the technical scheme that: the second positioning block is a square body, a columnar hole is formed in the center of the second positioning block, the axis of the second positioning block coincides with the axis of the stepped hole in the bottom plate, the second positioning block is fixed on the bottom plate through a screw, then a spring is arranged in the hook-shaped pressing plate, the second positioning block is integrally inserted into the columnar hole in the middle of the second positioning block, the second positioning block is arranged on the right end hole of the bottom plate, a double-end stud is inserted from the hook-shaped pressing plate and penetrates through the spring, the lower part of the double-end stud is fixed with the bottom plate 1 through a rotation stopping screw, the upper part of the double-end stud is screwed into a hexagonal nut, the hexagonal nut rotates upwards, the hook-shaped pressing plate is in a free state, the hook-shaped pressing plate can flexibly rotate left and right and can flexibly move up and down, and the hexagonal nut rotates downwards until the hook-shaped pressing plate compresses the protection cylinder after the working position of the hook-shaped pressing plate is adjusted.
The invention further adopts the technical scheme that: the third positioning block is irregularly shaped and is fixed on the bottom plate through a screw and a taper pin; one side surface of the base plate is level with the step surface at the other end of the base plate, and two adjacent side surfaces of the base plate are respectively level with two inclined surfaces of the base plate; a screw hole is formed in one side face of the third positioning block, which is flush with the inclined plane of the bottom plate, and the pressing screw is screwed in from the screw hole, so that the position of the measured part can be adjusted. When the device is installed, the third positioning block is fixedly connected to the right end of the bottom plate through the screw, the position of the third positioning block forms 30 degrees with the axis of the bottom plate, the compression screw is screwed in from the screw hole on the side face of the third positioning block, and the placement position of a part to be measured can be adjusted by rotating the compression screw. During measurement, the compression screw is screwed forward and clung to the side lower part of the protection cylinder, and the front contact of the conductive shaft and the ejector rod is ensured; when the parts are assembled and disassembled, the compression screw is screwed out.
The invention further adopts the technical scheme that: the whole hook-shaped pressing plate is columnar, a step hole is formed in the middle of the hook-shaped pressing plate, a protrusion is arranged at one end of the hook-shaped pressing plate and used as a hook-shaped end, and the end face of the hook-shaped end is a square plane and can press a part to be tested; a compression spring is arranged in the hook-shaped pressing plate, and the whole compression spring is inserted into a columnar hole in the middle of the second positioning block; the double-end stud penetrates through the hook-shaped pressing plate and the compression spring, the lower end of the double-end stud is fixed with the bottom plate through the rotation-stopping screw, and the upper end of the double-end stud is screwed into the hexagonal nut.
The invention further adopts the technical scheme that: the spring seat is integrally of two L-shaped plate splicing structures, the top surface of the spring seat is a plane, and a step hole is formed in one side, close to the dial indicator seat, of the spring seat along the axis; the upper circular clamping groove extends from the top surface to the bottom surface of the spring seat; positioning holes are formed in the two bottom surfaces of the spring seat and are fixed with the bottom plate through screws and taper pins; the spring baffle is a columnar body, a threaded hole is formed in the middle of the spring baffle, and one end face of the spring baffle is attached to one end face of the spring seat, which is far away from the installation dial indicator.
The invention further adopts the technical scheme that: the integral shape of the dial indicator seat is the same as that of the spring seat, two L-shaped plate splicing structures are adopted, and the top surface of the dial indicator seat is a plane; a step hole is formed along the axis on one side close to the dial indicator; the two bottom surfaces of the base plate are provided with positioning holes, and the positioning holes are fixed with the base plate through screws and taper pins; a screw hole is formed in one side face of the dial indicator seat, which is parallel to the axis, and an adjusting screw penetrates through the screw hole to be matched with the dial indicator seat, so that the position of the dial indicator can be adjusted.
The invention further adopts the technical scheme that: the ejector rod is integrally a multi-stage columnar body, a small plane is machined on the side wall of the large end of the ejector rod, a threaded hole is machined on the plane, and a section of external thread is machined on the small end of the ejector rod.
Effects of the invention
The invention has the technical effects that: the blind hole bottom assembly gap detection device comprises a pressing device, a positioning device and a measuring device, wherein the three devices are mutually matched, so that the gap between a conductive shaft and the bottom of a protection cylinder blind hole can be visually displayed, and can be measured by a conventional measuring instrument, the problems of repeated trial assembly and file repair in the assembly process, unstable quality caused by incapability of detection and the like are avoided, the detection cost is reduced, and the product assembly and detection efficiency is improved by more than 80%; the measuring device has the advantages of small volume, light weight, accurate installation and positioning, reliable tightening, and clear measured value; the device not only can be used as a necessary tool for assembly site and product detection, but also is convenient to carry, can be used as after-sales service detection equipment, and is convenient for detecting the problems of abrasion and the like in the working process of products.
Drawings
FIG. 1 is a block diagram of a part under test
FIG. 2 is a front view of the detecting unit of the present invention
FIG. 3 is a top view of the detection device of the present invention
FIG. 4 is a perspective view of the detecting unit of the present invention
FIG. 5 is a front view (cross-sectional view) of the base plate of the present invention
FIG. 6 is a top plan view of the base plate of the present invention
FIG. 7 is a top view of a first positioning block of the present invention
FIG. 8 is a front view of a first positioning block of the present invention
FIG. 9 is a front view of a third positioning block of the present invention
FIG. 10 is a top view of a third positioning block of the present invention
FIG. 11 is a front view of a second positioning block according to the present invention
FIG. 12 is a top view of the second positioning block
FIG. 13 is a top view of a hook platen
FIG. 14 is a front view of a hook plate
FIG. 15 is a front view (cross-sectional view) of a spring seat
FIG. 16 is a left side view of a spring seat
FIG. 17 is a top view of a spring seat
FIG. 18 is a front view of the ejector pin
FIG. 19 is a top view of the ejector pin
FIG. 20 is a schematic view of a handle of the present invention
FIG. 21 is a front view (cross-sectional view) of a dial gauge stand
FIG. 22 is a left side view of a dial indicator holder
FIG. 23 is a top view of the dial indicator base
FIG. 24 is a front view of a spring retainer
FIG. 25 is a left side view of a spring retainer
In the figure, 1-bottom plate, 2-dial, 3-ejector rod, 4-handle, 5-spring seat, 6-spring, 7-spring baffle, 8-first positioning block, 9-second positioning block, 10-stud, 11-hexagonal nut, 12-hook-shaped pressing plate, 13-pressing spring, 14-rotation stopping screw, 15-screw, 16-pressing screw, 17-third positioning block, 18-sleeve, 19-adjusting screw, 20-dial, 21-conductive shaft, 22-conductive rod, 23-protection cylinder
Detailed Description
The invention relates to a part assembly clearance detection device, in particular to a device for measuring the assembly clearance at the bottom of a blind hole, which comprises a positioning device, a pressing device and a measuring device, wherein the three parts are mutually matched to respectively play roles to jointly finish the measurement work. The positioning device comprises a bottom plate 1, a push rod 3, a handle 4, a spring seat 5, a spring 6, a spring baffle 7 and a first positioning block 8; the compressing device comprises a second positioning block 9, a double-end stud 10, a hexagonal nut 11, a hook-shaped pressing plate 12, a compressing spring 13, a rotation stopping screw 14, a screw 15, a compressing screw 16 and a third positioning block 17; the measuring device comprises a dial indicator seat 2, a sleeve 18, an adjusting screw 19 and a dial indicator 20; the three devices are all installed at corresponding positions on the bottom plate 1, one end of the ejector rod 3 in the positioning device is connected with the dial indicator in the measuring device, the other end of the ejector rod is in contact with the conductive shaft 01, the middle of the device is used for controlling the pressing force of a workpiece through the spring device, and when the conductive rod 02 is not installed, the conductive shaft 01 and the bottom of a blind hole of the protection cylinder 03 are free of gaps. When the conductive rod 02 is installed, a gap is formed between the conductive shaft 01 and the blind hole of the protection cylinder 03, and a specific value of the gap can be relatively accurately detected by the dial indicator 20 through mechanical transmission of the conductive shaft 01 and the ejector rod 3, so that a simple and clear measuring method is provided for detecting the gap size requirement in the assembly process.
In order to make the structure compact and reduce unnecessary weight, the whole bottom plate 1 is in a two-stage step shape and a plate shape, and the other end is provided with an inclined plane; one end of the bottom plate 1 is provided with a positioning hole for installing the dial indicator seat 2; a positioning hole is formed in the first step and used for installing the spring seat 5; a through hole is formed in the second step position of the bottom plate and is used as a positioning hole for the first positioning block 8; the other end of the bottom plate is provided with positioning holes, 4 positioning holes are arranged in a square shape, and the middle part of the 4 positioning holes is provided with a step hole for installing a second positioning block 9; the other end of the bottom plate is provided with a locating hole at a position of an inclined plane forming 30 degrees with the axis of the bottom plate, and the locating hole is used for installing a third locating block 17.
The dial indicator seat 2 adopts two L-shaped plate splicing structures, and the top surface of the dial indicator seat is a plane; the dial indicator seat 2 is arranged at one end of the bottom plate, and the end face of one end of the dial indicator seat is level with the end face of one end of the bottom plate; a step hole is formed in the dial indicator seat and in the side surface perpendicular to the axis of the bottom plate 1 along the axis direction; the two bottom surfaces of the base plate are provided with positioning holes, and the positioning holes are fixed with the base plate 1 through screws and taper pins; a screw hole is formed in one side surface of the dial indicator seat 2, which is parallel to the axis, and an adjusting screw 19 passes through the screw hole to be matched with the dial indicator seat 2, so that the position of the dial indicator 20 can be adjusted; the dial indicator seat 2 is used for installing and fixing the dial indicator 20.
The overall shape of the spring seat 5 is the same as that of the dial indicator seat 2, and two L-shaped plate splicing structures are adopted, and the top surface of the spring seat is a plane; the spring seat 5 is arranged at the position of the first step surface of the bottom plate, and one end surface of the spring seat is flush with the end surface of the first step surface of the bottom plate; a step hole is formed in the spring seat 5 and in the side surface perpendicular to the axis of the bottom plate 1 along the axis direction; a circular clamping groove is formed in one side, flush with the first step surface, of the spring seat 5, and extends from the top surface to the bottom surface of the spring seat 5; positioning holes are formed in the two bottom surfaces of the spring seat 5, and the positioning holes are fixed with the bottom plate 1 through screws and taper pins.
The ejector rod 3 is a multi-step columnar body integrally and can pass through a step through hole in the middle of the spring seat 5; a small plane is processed on the side wall of the large end, a threaded hole is processed on the plane and used for installing a handle 4, and the outer diameter of the large end is larger than the aperture of the left end of the step hole of the spring seat 5; the small end of the spring baffle is provided with external threads, and the spring baffle 7 is matched with the ejector rod 3 through the external threads of the small end.
The spring baffle 7 is a columnar body, a threaded hole is formed in the middle of the spring baffle along the axis, and one end face of the spring baffle is attached to one end face of the spring seat 5, which is far away from the installation dial indicator 20; the outer diameter of the spring baffle 7 is larger than the aperture of the right end of the step hole of the spring seat 5;
the handle 4 is a multi-stage columnar body, and an external thread is arranged at the outer side of the small end of the handle and matched with a threaded hole at the large end of the ejector rod 3 to drive the ejector rod 3 to horizontally move; the outer diameter of the large end of the handle 4 is consistent with the size of the circular clamping groove of the spring seat 5;
the pressing assembly comprises a main pressing part and a side pressing part, wherein the main pressing part comprises a second positioning block 9, a hook-shaped pressing plate 12 and a pressing spring 13, the second positioning block 9 is fixed above a round hole at the rightmost end of a bottom plate by using screws, then the hook-shaped pressing plate 12 is internally provided with the spring 13, the whole pressing assembly is inserted into a columnar hole in the middle of the second positioning block 9, the second positioning block 9 is arranged on a hole at the right end of the bottom plate 1, then a double-end stud 10 is inserted from the hook-shaped pressing plate 12 and penetrates through the spring 13, the lower part of the double-end stud 10 is fixed with the bottom plate 1 by using a rotation stopping screw 14, the upper part of the double-end stud 10 is screwed into a hexagonal nut 11, the hexagonal nut 11 is rotated upwards, the hook-shaped pressing plate 12 is in a free state, the hexagonal nut 11 can flexibly rotate left and right and can flexibly move up and down until the hook-shaped pressing plate 12 presses a protection cylinder 23 after the working position of the hook-shaped pressing plate 12 is adjusted. The side compression part comprises a compression screw 16 and a third positioning block 17, when the side compression part is installed, the third positioning block 17 is fixedly connected to the right end of the bottom plate 1 through screws and forms a 30-degree position with the axis of the bottom plate, the compression screw 16 is screwed in from a screw hole on the side surface of the third positioning block 17, and the placement position of a part to be measured can be adjusted by rotating the compression screw 16. During measurement, the compression screw 16 is screwed forward and is tightly attached to the side lower part of the protection cylinder 23, and the front contact of the conductive shaft 21 and the ejector rod 3 is ensured; when the parts are assembled and disassembled, the compression screw 16 is screwed out.
The whole first positioning block 8 is a two-stage column body, and the small end of the first positioning block can be inserted into a positioning through hole at the second step of the bottom plate 1; the middle part of the large end of the device is provided with a central hole along the axis for installing the part to be tested; a rectangular tangential plane is longitudinally arranged on one side surface of the large end of the spring seat, and the tangential plane is parallel to the end surface of the spring seat 5.
The second positioning block 9 is a square body, a columnar hole is arranged in the middle of the second positioning block, and the axis of the second positioning block is coincident with the axis of the positioning step hole of the bottom plate 1; the periphery of the second positioning block 9 is provided with positioning holes, and the second positioning block is connected with the bottom plate 1 through screws.
The whole hook-shaped pressing plate 12 is columnar, and a step hole is formed in the middle of the hook-shaped pressing plate; one end of the hook-shaped pressing plate 12 is provided with a boss serving as a hook-shaped end; the end face of the hook-shaped end is a square plane and can press the part to be tested; the hook-shaped pressing plate 12 can be inserted into the columnar hole in the middle of the second positioning block 9.
The third positioning block 17 is designed according to actual detection requirements, is an irregularly-shaped part, is provided with a slot in the middle, is provided with screw holes and pin holes on the left and right sides, is provided with screw holes on the side surface of the slot, and is fixed on the bottom plate 1 through screws and taper pins; one side surface of the base plate is level with the second step surface of the base plate 1, and the two adjacent side surfaces are respectively level with the two inclined surfaces of the base plate 1; the third positioning block 17 is provided with a screw hole on one side surface flush with the inclined surface of the bottom plate, and the pressing screw 16 is screwed in from the screw hole, so that the position of the measured part can be adjusted.
The parts consisting of the ejector rod 3, the handle 4, the spring seat 5, the spring 6 and the spring baffle 7 can simulate the working state of the tested conductive shaft 01 under the action of external force when in work. When the handle 4 is placed into the semicircular hole on the left side of the spring seat 5, the force generated by the spring 6 can be applied to one end of the conductive shaft 21, and when an operator pulls the handle 4 leftwards by hand and rotates the handle to form 30-45 degrees with the semicircular clamping groove on the left side of the spring seat 5 and then naturally places the handle, the handle 4 and the left end face of the spring seat 5 are tightly attached and fixed. The right side of the ejector rod 3 is not contacted with the conductive shaft 21 any more, and the tested conductive shaft 21, the conductive rod 22 and the protection cylinder 23 can be taken out. The spring seat 5 is installed to fix the spring and simulate the working state of the tested piece to apply force to the left side of the conductive shaft 21 to enable the conductive shaft to be tightly attached to the bottom of the blind hole of the protection cylinder 23, and an operator pulls the conductive shaft leftwards by hand during detection and rotates the position of the handle 4 through a semicircular clamping groove on the left side of the spring seat 5 so as to control the position of the ejector rod 3. When the tested conductive shaft 21, the conductive rod 22 and the protection cylinder 23 are required to be installed/disassembled, an operator pulls the handle 4 leftwards by hand and rotates the handle to form 30-45 degrees with the semicircular clamping groove on the left side of the spring seat 5, and then the tested conductive shaft is naturally placed; when the detection is carried out, an operator pulls the handle 4 leftwards by hand and rotates the handle to naturally place the handle in the semicircular clamping groove on the left side of the spring seat 5.
The dial indicator seat 2 is used for fixing the dial indicator 20 and keeping the dial indicator fixed during measurement, and can adjust the position left and right according to measurement requirements. The hook-shaped pressing plate 12 can avoid the structural interference of the tested parts such as the conductive shaft 21, the protection cylinder 23 and the like in the pressing process, after the spring 13 is arranged in the hook-shaped pressing plate 12, the whole body of the hook-shaped pressing plate is inserted into a columnar hole in the middle of the second positioning block 9, the second positioning block 9 is arranged on a right end hole of the bottom plate 1, then the double-end stud 10 is inserted from the hook-shaped pressing plate 12 and penetrates through the spring 13, the lower part of the double-end stud 10 and the bottom plate 1 are fixed by the rotation stopping screw 14, the hexagonal nut 11 is screwed in the upper part, the hexagonal nut 11 is rotated upwards, the hook-shaped pressing plate 12 is in a free state, the hook-shaped pressing plate 12 can flexibly rotate left and right and can flexibly move up and down, and after the working position of the hook-shaped pressing plate 12 is adjusted, the hexagonal nut 11 is rotated downwards until the hook-shaped pressing plate 12 presses the protection cylinder 23.
Ensuring the compaction requirement in the measuring process. The third positioning block 17 and the compression screw 16 can enable the protection cylinder 23 of the measured part to be positioned accurately and reliably, and simultaneously plays an auxiliary compression role.
When in installation:
firstly, installing a spring seat 5, after aligning the spring seat 5 with two small steps on the left side of a bottom plate 1, fixing the spring seat with a screw and a taper pin, inserting a push rod 3 from the left end of the spring seat 5, penetrating a spring 6 into the push rod 3 from the right end of the spring seat 5, screwing a spring baffle 7 into the right end of the push rod 3, fixing the spring, inserting a handle 4 into a screw hole on the left end of the push rod 3, enabling the handle to pull the push rod 3 to move left and right, and when a part to be tested is not installed, namely in a non-working state, pulling the handle 4 forcibly and rotating the handle 4 to form an included angle of 30-45 degrees with a semicircular clamping groove, enabling the handle 4 to be tightly attached and fixed with the left end face of the spring seat 5, and rotating the handle 4 to be placed into the semicircular clamping groove during measurement, and enabling the right end face of the push rod 3 to be tightly attached to a conductive shaft 21 of the part to be tested.
Secondly, installing a measuring device, namely aligning the dial indicator seat 2 with the leftmost end of the bottom plate 1, fixing the position by using a screw and a taper pin, inserting a sleeve 18 for clamping the dial indicator 20 into the dial indicator seat 2 from the right end of the dial indicator seat 2, inserting a feeler lever of the dial indicator 20 into the dial indicator seat 2 from the left end, screwing a screw hole into the side surface of the dial indicator seat 2 by using an adjusting screw 19, compacting the sleeve 18, and adjusting the left and right positions of the dial indicator 20 by adjusting the tightness of the screw;
the third step of installing a positioning device, namely installing the small end of the first positioning block 8 in a hole on the right end of the middle part of the bottom plate 1, so that the round tangent plane on the upper part of the first positioning block 8 is parallel to the end face of the spring seat 5;
a fourth step of installing a pressing device, namely fixing a second positioning block 9 on the rightmost side of the bottom plate 1 by using a screw and a taper pin, ensuring that the second positioning block 9 is concentric with a hole on the right side of the bottom plate 1, then installing a pressing spring 13 into a hook-shaped pressing plate 12, installing the pressing spring into a middle cylinder of the second positioning block 9, inserting a stud 10 from the upper part of the hook-shaped pressing plate 12 and penetrating the pressing spring 13, screwing the stud into a threaded hole of the bottom plate 1, and finally preparing a threaded hole from the joint of the lower part of the bottom plate 1 and the stud 10 and screwing a rotation stopping screw 14 into the threaded hole to prevent the stud 10 from rotating during working;
and fifthly, continuously installing a pressing device, aligning the third positioning block 17 with the bevel angle position and the stage position of the right end of the bottom plate 1, fixing by using a screw and a taper pin, and screwing the pressing screw 16 into a screw hole on the side surface of the third positioning block 17.
During measurement, the tested conductive shaft 21 is firstly installed in the hole of the protection cylinder 23, and then is placed on the first positioning block 8 of the detection device together, so that one end of the conductive shaft 21 is aligned with the ejector rod 3 of the positioning device. The placement position of the measured part is preliminarily adjusted by rotating the compression screw 16; the handle 4 is arranged in a semicircular clamping groove at the left end of the spring seat 5 by adjusting the handle 4, and the right end of the ejector rod 3 presses the left end of the tested conductive shaft 21; rotating the compression screw 16 until it is not rotatable; then, the hexagonal nut 11 is rotated to press the hook-shaped pressing plate 12 against the measured part. Finally, the dial indicator device at the left end of the measuring tool is adjusted, so that the dial is adjusted to be in a zero position after the contact of the dial indicator is tightly contacted with the ejector rod 3.
During measurement, the measured conducting rod 02 is inserted into the protection cylinder 03 and the conducting shaft 01, and as the conducting rod 02 is in contact with the conducting shaft 01, a gap is formed between the conducting shaft 01 and the right end of a hole of the protection cylinder 03, the distance of the gap is the displacement generated by the conducting shaft 01 leftwards when the conducting rod 02 is inserted into the conducting shaft 01, and the displacement is transmitted to a dial indicator value of the dial indicator 20 through the ejector rod 3, so that the specific numerical value of the assembly gap between the conducting shaft 01 and the bottom of the protection cylinder 03 can be measured, and the measurement requirement is met.
The blind hole bottom assembly gap detection device is accurate in positioning, the clamping device is flexible to adjust, and the clamping of parts with different sizes can be met. The invention is not limited to the assembly detection of the parts in the embodiment, and is also suitable for the detection of similar structures in other industries.
Claims (6)
1. The blind hole bottom assembly gap detection device is characterized by comprising a bottom plate (1), a pressing assembly, a positioning assembly and a measuring assembly, wherein the measuring assembly, the positioning assembly and the pressing assembly are sequentially arranged on the bottom plate (1) from one end of the bottom plate (1); the component to be tested comprises a conductive rod (22), a protection cylinder (23) and a conductive shaft (21); the pressing component is used for pressing and fixing the protection cylinder (23), the positioning component is used for positioning the conducting rod (22) and the conducting shaft (21) during measurement, and the measuring component is used for measuring the gap between the conducting shaft (21) and the protection cylinder (23);
the measuring assembly comprises a dial indicator seat (2), an adjusting screw (19), a sleeve (18) and a dial indicator (20), wherein the dial indicator seat (2) is fixedly connected to the leftmost end of the bottom plate (1), a feeler lever of the dial indicator (20) is inserted into the dial indicator seat (2), the inserted end is sleeved into the sleeve (18), and the pressing is carried out through the adjusting screw (19); the position of the dial indicator (20) is adjusted by adjusting the tightness of the adjusting screw (19);
the positioning assembly comprises a push rod (3), a handle (4), a spring seat (5), a spring (6), a spring baffle (7) and a first positioning block (8); the first positioning block (8) is fixedly connected to the bottom plate (1), the spring seat (5) is fixedly connected to the first step surface of the bottom plate 1, a semicircular clamping groove is formed in one side, close to the dial indicator seat (2), of the spring seat (5), and the axis of the clamping groove is perpendicular to the axis of the spring seat (5); one end of the ejector rod (3) is contacted with the end head of a feeler lever of the dial indicator (20), and the other end is sleeved into the spring (6) and then inserted into the spring seat (5) to be connected with the spring baffle (7); one end of the ejector rod (3) is in threaded connection with one end of the handle (4), and the other end of the ejector rod is connected with the spring baffle; when not measured, the side wall of the handle (4) is not positioned in the semicircular clamping groove, and when measured, the handle (4) is positioned in the semicircular clamping groove; one end of the conductive shaft (21) is inserted into the protection cylinder (23), and the other end extends out of the protection cylinder (23) and is tightly contacted with the ejector rod (3) during measurement;
the pressing assembly comprises a main pressing part and a side pressing part, wherein the main pressing part comprises a second positioning block (9), a hook-shaped pressing plate (12), a double-end stud 10 and a pressing spring (13); the second positioning block (9) is fixedly connected above a round hole at the rightmost end of the bottom plate, the compression spring (13) is positioned in the hook-shaped pressing plate (12), and the compression spring (13) and the hook-shaped pressing plate (12) are integrally inserted into a columnar hole in the middle of the second positioning block (9); the second positioning block (9) is arranged in a hole of the bottom plate (1), and the hook-shaped pressing plate (12) of the second positioning block (9) is inserted into the stud (10) and penetrates through the compression spring (13); the lower part of the double-end stud (10) is fixedly connected with the bottom plate (1), the hexagonal nut (11) is screwed in the upper part of the double-end stud, the hexagonal nut (11) rotates upwards, the hook-shaped pressing plate (12) is in a free state, and the hook-shaped pressing plate (12) can flexibly rotate left and right and flexibly move up and down; the side compression part comprises a compression screw (16) and a third positioning block (17), the third positioning block (17) is fixedly connected to the right end of the bottom plate (1) and forms a position of 30 degrees with the axis of the bottom plate, the compression screw (16) is screwed in from a screw hole on the side surface of the third positioning block (17), and the compression screw (16) is rotated to adjust the placement position of a part to be measured;
the conducting rod (22) is positioned at the upper part of the protection cylinder (23), the conducting shaft (21) is inserted into a blind hole formed in the side wall of the protection cylinder (23), the axis of the conducting shaft (21) is perpendicular to the axis of the protection cylinder (23), and at the moment, the gap between the conducting shaft (21) and the bottom of the blind hole of the protection cylinder (23) is zero under the action of external force; when the conductive rod (22) moves downwards along the axis, the conductive rod is inserted into the right hole of the conductive shaft (21), and the axis of the right hole is not coincident with the axis of the conductive shaft (21); the conductive rod (22) drives the conductive shaft (21) to move away from the bottom of the blind hole of the protection cylinder (23) so as to generate a gap, and the dial indicator (20) detects the gap value through the mechanical transmission of the conductive shaft (21) and the ejector rod (3);
the whole first positioning block (8) is a two-stage columnar body, the small end of the first positioning block can be inserted into a positioning through hole at the second step of the bottom plate (1), and the middle part of the large end of the first positioning block is provided with a central hole along the axis for installing a part to be tested; a rectangular tangential plane is longitudinally arranged on one side surface of the large end of the spring seat, and the tangential plane is parallel to the end surface of the spring seat (5);
the second positioning block (9) is a square body, a columnar hole is formed in the center of the second positioning block, the axis of the second positioning block coincides with the axis of the stepped hole on the bottom plate (1), the second positioning block is fixed on the bottom plate through a screw, then the hook-shaped pressing plate (12) is internally provided with a pressing spring (13), the second positioning block is integrally inserted into the columnar hole in the middle of the second positioning block (9), the second positioning block (9) is arranged on the right end hole of the bottom plate (1), then a stud (10) is inserted from the hook-shaped pressing plate (12) and penetrates through the pressing spring (13), the lower part of the stud (10) and the bottom plate (1) are fixed through a rotation stopping screw (14), the upper part of the stud is screwed into the hexagonal nut (11), the hexagonal nut (11) rotates upwards, the hook-shaped pressing plate (12) is in a free state, the hook-shaped pressing plate (12) can flexibly rotate left and right, and flexibly move up and down until the hook-shaped pressing plate (12) presses the protection cylinder (23) after the working position of the hook-shaped pressing plate (12) is adjusted;
the third positioning block (17) is fixed on the bottom plate (1) through a screw and a taper pin; one side surface of the base plate is level with the step surface at the other end of the base plate (1), and two adjacent side surfaces of the base plate are respectively level with two inclined surfaces of the base plate (1); a screw hole is formed in one side surface of the third positioning block (17) flush with the inclined surface of the bottom plate, and a compression screw (16) is screwed in from the screw hole, so that the position of a part to be measured can be adjusted; when the device is installed, the third positioning block (17) is fixedly connected to the right end of the bottom plate (1) by a screw at a position forming 30 degrees with the axis of the bottom plate, the compression screw (16) is screwed in from a screw hole on the side surface of the third positioning block (17), and the placement position of a part to be measured can be adjusted by rotating the compression screw (16); during measurement, the compression screw (16) is screwed forward and is tightly attached to the lateral lower part of the protection cylinder (23), and the front contact of the conductive shaft (21) and the ejector rod (3) is ensured; when the parts are assembled and disassembled, the compression screw (16) is screwed outwards.
2. The blind hole bottom assembly gap detection device according to claim 1, wherein one end of the bottom plate (1) far away from the installation dial indicator (20) is provided with a through hole and a step hole respectively, the first positioning block is installed on the through hole and is in interference fit with the hole on the bottom plate (1), the first positioning block (8) is of a step shaft-shaped structure, the small end of the first positioning block is inserted into the through hole on the bottom plate (1), one side surface of the large end of the first positioning block is longitudinally provided with a rectangular tangent plane, the tangent plane is parallel to the end surface of the spring seat 5, and the protection cylinder (23) is placed on the first positioning block (8); the second positioning block (9) is arranged on the step hole, the second positioning block (9) is fixedly connected with the bottom plate through a screw and a taper pin, and the axis of the middle cylindrical hole is coincident with the axis of the step hole on the bottom plate.
3. The blind hole bottom assembly gap detection device according to claim 1, wherein the whole of the hook-shaped pressing plate (12) is columnar, a step hole is formed in the middle of the hook-shaped pressing plate, a protrusion is formed at one end of the hook-shaped pressing plate (12) and used as a hook-shaped end, and the end face of the hook-shaped end is a square plane and can press a part to be detected; a compression spring (13) is arranged in the hook-shaped pressing plate (12), and is integrally inserted into a columnar hole in the middle of the second positioning block (9); the double-end stud (10) passes through the hook-shaped pressing plate (12) and the compression spring (13), the lower end of the double-end stud is fixed with the bottom plate (1) through the rotation-stopping screw (14), and the upper end of the double-end stud is screwed into the hexagonal nut (11).
4. The blind hole bottom assembly gap detection device according to claim 1, wherein the spring seat (5) is integrally of two L-shaped plate splicing structures, the top surface of the spring seat is a plane, and a step hole is formed in one side, close to the dial indicator seat (2), of the spring seat (5) along the axis; the upper circular clamping groove extends from the top surface to the bottom surface of the spring seat (5); positioning holes are formed in the two bottom surfaces of the spring seat (5), and the positioning holes are fixed with the bottom plate (1) through screws and taper pins; the spring baffle (7) is a columnar body, the middle part of the spring baffle is provided with a threaded hole, and one end face of the spring baffle is attached to the end face of one side of the spring seat (5) far away from the installation dial indicator (20).
5. The blind hole bottom assembly gap detection device according to claim 1, wherein the overall shape of the dial indicator seat (2) is the same as that of the spring seat (5), and two L-shaped plate splicing structures are adopted, and the top surface of the dial indicator seat is a plane; a step hole is formed along the axis on one side close to the dial indicator (20); positioning holes are formed in the two bottom surfaces of the base plate (1) and are fixed with the base plate through screws and taper pins; a screw hole is arranged on one side surface of the dial indicator seat (2) parallel to the axis, an adjusting screw (19) passes through the screw hole to be matched with the dial indicator seat (2), and the position of the dial indicator (20) can be adjusted.
6. A blind hole bottom assembly gap detecting device according to claim 1, characterized in that the ejector rod (3) is integrally a multi-step column, a small plane is processed on the side wall of the large end, a threaded hole is processed on the plane, and a section of external thread is processed on the small end.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811093843.5A CN109115087B (en) | 2018-09-19 | 2018-09-19 | Blind hole bottom assembly clearance detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811093843.5A CN109115087B (en) | 2018-09-19 | 2018-09-19 | Blind hole bottom assembly clearance detection device |
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| CN101788253A (en) * | 2010-03-17 | 2010-07-28 | 上海大学 | Device for measuring axial assembling clearance between tappet body component roller wheel and tappet body for fuel injection system of automobile |
| CN102538635A (en) * | 2010-12-15 | 2012-07-04 | 桂林航天电子有限公司 | Axial clearance detection device for electromagnetic relay and use method thereof |
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