CN219083961U - Measuring tool capable of rapidly detecting outer circle wall thickness of hollow shaft - Google Patents

Abstract

The utility model provides a measuring tool capable of rapidly detecting the wall thickness of the excircle of a hollow shaft, which comprises a bottom plate, a fixing frame, a detection measuring tool, a positioning component and a bottom sleeve, wherein the fixing frame and the bottom sleeve are both arranged on the bottom plate; the detection measuring tool comprises a rotary support, a measuring arm, a measuring lever and a dial indicator. The utility model is provided with a bottom sleeve, a positioning component and a detection measuring tool, when the hollow shaft to be detected is placed in the bottom sleeve, the positioning component is pressed down to be abutted against the inner wall of the excircle of the hollow shaft to be detected, and the bottom end of the positioning component is provided with a circle with a fixed diameter, namely, the inner wall of the excircle of the hollow shaft to be detected is provided with a circle with the diameter. The distance between the two circles is the wall thickness of the outer circle of the hollow shaft.

Description

Measuring tool capable of rapidly detecting outer circle wall thickness of hollow shaft

Technical Field

The utility model relates to the technical field of equipment for detecting the wall thickness of outer circles at two ends of a turning piece of a hollow spindle of an automobile transmission shaft, in particular to a measuring tool capable of rapidly detecting the wall thickness of the outer circle of a hollow shaft.

Background

The outer circle detection procedure of the two ends of the turning piece of the hollow shaft requires the first piece detection of the wall thickness of the product, and the wall thickness at the position is special-shaped and cannot be measured by conventional means. As shown in FIG. 1, for example, a hollow shaft is provided with wall thickness requirements at the outer circumference of the end

The diameter of the outer wall is phi 41mm, the diameter of the inner wall is phi 28mm, namely, the outer wall of the hollow shaft only has one circle with the diameter of phi 41mm and the inner wall has one circle with the diameter of phi 28mm, and the distance between the two circles is

And the wall thickness of the hollow shaft can be judged to meet the production requirement. In the detection method in the prior art, a worker is required to cut a workpiece after turning firstly through procedures such as cutting, polishing and grinding, firstly, a cutter is cut to remove a left end shaft section, then a cutter is cut to remove a right end shaft section to obtain an outer circle of the hollow shaft, then the outer circle of the hollow shaft is longitudinally cut along a central axis and sent to a precise detection chamber, the wall thickness is measured by manually drawing lines of a detection person, the worker firstly measures the outer circle of phi 41mm, then measures the inner circle of phi 28mm, and then measures the distance between the two circles, so that the labor intensity of the worker for cutting, polishing and grinding the workpiece is high, the time is long, the efficiency is low, about 30 minutes is required, and meanwhile, the line drawing measurement has no positioning reference and large error. Therefore, the measuring tool is designed, the measuring position can be accurately found according to the measuring requirement of the outer circular wall thickness of the hollow shaft, and whether the size is out of tolerance can be rapidly judged, so that the measuring efficiency is improved, and the measuring error is reduced.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present utility model is to provide a measuring tool for rapidly detecting the wall thickness of a hollow shaft, which can accurately find a measurement position, rapidly determine whether the dimension is out of tolerance, improve the measurement efficiency, and reduce the measurement error compared with the line drawing measurement in the prior art.

In order to achieve the above purpose, the utility model provides a measuring tool capable of rapidly detecting the wall thickness of an excircle of a hollow shaft, which comprises a bottom plate, a fixing frame, a detecting measuring tool, a positioning component and a bottom sleeve, wherein the fixing frame and the bottom sleeve are both arranged on the bottom plate, the positioning component is arranged on the fixing frame and is positioned right above the bottom sleeve, the bottom sleeve is used for supporting the outer wall of the excircle of the hollow shaft to be detected, and the bottom end of the positioning component is abutted with the inner wall of the excircle of the hollow shaft to be detected; the measuring tool comprises a rotating support, a measuring arm, a measuring lever and a dial indicator, wherein the rotating support is rotatably sleeved on a fixing frame, the height of the rotating support is adjustable, the measuring arm is fixed on the rotating support, the measuring lever is arranged in the measuring arm, one end bottom surface of the measuring lever is abutted to the measuring end of the dial indicator, and the other end bottom surface of the measuring lever is abutted to a positioning assembly.

Preferably, a hoop is further arranged between the rotary support and the fixing frame, and the hoop can be locked on the periphery of the fixing frame; the rotary support is sleeved on the hoop and can rotate around the hoop, a shield is arranged on the upper side of the rotary support, a first compression spring is arranged between the shield and the rotary support, the top end of the first compression spring is connected with the shield, and the bottom end of the first compression spring is connected with the rotary support.

Preferably, the dial indicator is fixed on the bottom surface of the measuring arm through a mounting frame, a U-shaped groove is formed in the measuring arm, and the measuring lever is hinged between two side walls of the U-shaped groove; the top surface of the measuring arm is provided with an adjusting piece, and the length of the adjusting piece in the U-shaped groove is adjustable; the measuring end of the dial indicator is abutted with the bottom surface of the measuring lever.

Preferably, the positioning assembly comprises a top sleeve, a central ejector rod, a measuring contact piece, a positioning ejector block and an ejector rod moving unit, wherein a fixed seat is arranged on the fixed frame and is positioned right above the bottom sleeve, the fixed seat is a hollow piece, and the top sleeve is arranged on the top surface of the fixed seat; the central ejector rod penetrates through the top sleeve and can move up and down in the fixed seat through the ejector rod moving unit, the measuring contact piece and the positioning ejector block are detachably arranged at the bottom end of the central ejector rod, and the top surface of the measuring contact piece is abutted with the bottom surface of one end of the measuring lever far away from the dial indicator; and the positioning ejector block is abutted against the inner wall of the excircle of the hollow shaft to be tested.

Preferably, the bottom end of the central ejector rod is provided with a threaded hole, the measuring contact piece is provided with a through hole, the top end of the positioning ejector block is provided with a stud, and the positioning ejector block and the measuring contact piece are detachably connected with the central ejector rod through the stud, the through hole and the threaded hole.

Preferably, the ejector rod moving unit comprises a fixed sleeve, a sliding sleeve and a handle, wherein the fixed sleeve is arranged between the fixed seat and the central ejector rod and is fixedly connected with the central ejector rod, and the number of the fixed sleeves is two; the sliding sleeve is sleeved on the periphery of the central ejector rod, the sliding sleeve is arranged between the two fixed sleeves, and the sliding sleeve is fixedly connected with the handle; the outer wall of fixing base has still seted up the spout, the handle drives the sliding sleeve up-and-down motion along the spout.

Preferably, the sliding groove is formed along the extending direction of the fixing seat, and the two ends of the sliding groove are provided with locking grooves along the direction perpendicular to the sliding groove.

Preferably, the ejector rod moving unit further comprises a second compression spring, one end of the second compression spring is connected with the sliding sleeve, and the other end of the second compression spring is connected with any one of the fixed sleeves.

Preferably, the fixing frame comprises two vertical shaft connecting pipes and a plurality of connecting frames, the bottom ends of the two vertical shaft connecting pipes are fixedly connected with the bottom plate, and the connecting frames fixedly connect the two vertical shaft connecting pipes.

Preferably, the bottom surface of the bottom plate is also provided with supporting feet.

The measuring tool capable of rapidly detecting the outer circular wall thickness of the hollow shaft has the following beneficial effects:

the measuring tool capable of rapidly detecting the wall thickness of the outer circle of the hollow shaft is provided with a bottom sleeve, a positioning assembly and a detecting measuring tool, the outer circle of the hollow shaft to be detected is placed in the bottom sleeve, the top of the bottom sleeve is provided with a bowl-shaped opening, and a circle with a fixed diameter is arranged in the bowl-shaped opening, so that when the hollow shaft to be detected is placed in the bottom sleeve, the outer wall of the hollow shaft to be detected is abutted with the top circle of the bottom sleeve, namely, the outer wall of the outer circle of the hollow shaft to be detected is provided with a circle with the diameter; when the hollow shaft to be detected is placed in the bottom sleeve, the positioning component is pressed down to be abutted against the inner wall of the outer circle of the hollow shaft to be detected, and at the moment, the bottom end of the positioning component is provided with a circle with a fixed diameter, namely, the inner wall of the outer circle of the hollow shaft to be detected is provided with a circle with the diameter. The distance between the two circles is the wall thickness of the outer circle of the hollow shaft.

Placing a standard hollow shaft excircle in the bottom sleeve, pressing the positioning component on the inner wall of the hollow shaft excircle, and resetting the detection measuring tool to zero at the moment; and taking down the standard hollow shaft excircle, then placing the standard hollow shaft excircle into the hollow shaft excircle to be detected, and when the indication displayed by the detection measuring tool exceeds the error range, indicating that the hollow shaft excircle to be detected is unqualified. The method can solve the problems of high labor intensity, long time, low efficiency and large error generated by cutting, polishing and grinding for multiple times in the prior art, can rapidly judge whether the outer circular wall thickness of the hollow shaft is qualified, effectively improves the measurement efficiency and reduces the measurement error.

Drawings

FIG. 1 is a schematic view of the outer circular wall thickness of a hollow shaft in the prior art;

FIG. 2 is a schematic space diagram of a gauge of the present utility model capable of rapidly detecting the outer circular wall thickness of a hollow shaft;

FIG. 3 is an enlarged view at A in FIG. 2;

fig. 4 is an enlarged view at B in fig. 2;

FIG. 5 is a schematic diagram of the present utility model for measuring a gauge that can rapidly detect the wall thickness of the outer circumference of a hollow shaft;

FIG. 6 is a front view of a holder for a gauge of the present utility model that can rapidly detect the wall thickness of the outer circumference of a hollow shaft;

FIG. 7 is a schematic space view of a positioning top block of a measuring tool capable of rapidly detecting the outer circular wall thickness of a hollow shaft.

Reference numerals illustrate:

1. a bottom plate; 101. supporting feet; 102. a vertical shaft head; 103. a fixing frame; 104. a connecting frame; 105. a fixing seat; 106. a chute; 107. a locking groove;

2. a positioning assembly; 201. a central ejector rod; 202. a fixed sleeve; 203. a sliding sleeve; 204. a second compression spring; 205. a handle; 206. a top sleeve; 207. measuring a contact piece; 208. positioning a top block; 2081. a stud;

3. detecting a measuring tool; 301. a rotating bracket; 302. a hoop; 303. a shield; 304. a retainer ring for the shaft; 305. a first compression spring; 306. a measuring arm; 307. an adjusting member; 308. a measuring lever; 309. a mounting frame; 310. a dial indicator; 311. a positioning pin; 312. a rotating shaft;

4. a bottom sleeve;

5. the excircle of the hollow shaft; 501. an outer wall positioning part; 502. and the inner wall is positioned.

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present utility model, which is described by the following specific examples.

It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or adjustments of the sizes, which are otherwise, used in the practice of the utility model, are included in the spirit and scope of the utility model which is otherwise, without departing from the spirit or scope thereof. Also, the terms such as "upper", "lower", "left", "right", "middle", etc. are used herein for convenience of description, but are not to be construed as limiting the scope of the utility model, and the relative changes or modifications are not to be construed as essential to the scope of the utility model.

As shown in fig. 2-7, the utility model provides a measuring tool capable of rapidly detecting the outer circle wall thickness of a hollow shaft, which comprises a bottom plate 1, a fixing frame 103, a detecting measuring tool 3, a positioning component 2 and a bottom sleeve 4, wherein the fixing frame 103 and the bottom sleeve 4 are all arranged on the bottom plate 1, the positioning component 2 is arranged on the fixing frame 103, the positioning component 2 is positioned right above the bottom sleeve 4, the bottom sleeve 4 is used for supporting the outer wall of the outer circle 5 of the hollow shaft to be detected, and the bottom end of the positioning component 2 is abutted with the inner wall of the outer circle 5 of the hollow shaft to be detected; the detection measuring tool 3 comprises a rotary support 301, a measuring arm 306, a measuring lever 308 and a dial indicator 310, the rotary support 301 is rotatably sleeved on the fixed frame 103, the height of the rotary support 301 is adjustable, the measuring arm 306 is fixed on the rotary support 301 through a screw, the measuring lever 308 is arranged in the measuring arm 306, the bottom surface of the left end of the measuring lever 308 is abutted with the measuring end of the dial indicator 310, and the bottom surface of the right end of the measuring lever 308 is abutted with the positioning assembly 2.

The utility model relates to a measuring tool capable of rapidly detecting the wall thickness of an outer circle of a hollow shaft, which comprises the steps of firstly supporting the outer wall of the outer circle 5 of the hollow shaft which is qualified in standard by adopting a bottom sleeve 4, pressing a positioning component 2 on the inner wall of the outer circle 5 of the hollow shaft which is qualified in standard, respectively abutting two ends of a measuring lever 308 in the measuring tool 3 on the measuring end of a dial indicator 310 and the top surface of the positioning component 2, then zeroing the dial indicator 310, then taking down the outer circle 5 of the hollow shaft which is qualified in standard, replacing the outer circle 5 of the hollow shaft which is qualified in standard, repeating the actions, and judging whether the outer circle 5 of the hollow shaft which is to be tested is qualified according to the indication of the dial indicator 310.

Preferably, as shown in fig. 3, a hoop 302 is further arranged between the rotary support 301 and the fixing frame 103, and the hoop 302 can be locked on the periphery of the fixing frame 103; the rotary support 301 is sleeved on the hoop 302 and can rotate around the hoop 302, a shield 303 is arranged on the upper side of the rotary support 301, a first compression spring 305 is arranged between the shield 303 and the rotary support 301, the top end of the first compression spring 305 is connected with the shield 303, and the bottom end of the first compression spring 305 is connected with the rotary support 301. Further, the shroud 303 serves to prevent dust and foreign matter from entering into the gap between the rotating bracket 301 and the anchor ear 302. To prevent the shield 303 from sliding on the mount 103, a collar 304 for the shaft is provided on top of the shield 303. The first compression spring 305 is to ensure that the rotary support 301 does not shake up and down during rotation. Further, a washer is further provided between the rotary bracket 301 and the bottom end of the first compression spring 305, and the first compression spring 305 is pressed against the top surface of the rotary bracket 301 through the washer.

Further, in order to realize the initial positioning of the rotary support 301 and the anchor ear 302, the anchor ear 302 is further provided with a positioning pin 311, the bottom surface of the rotary support 301 is provided with a positioning groove, the positioning groove is arc-shaped, and when the rotary support 301 is sleeved on the anchor ear 302, the positioning pin 311 is inserted into the positioning groove, so that the initial positioning of the rotary support 301 and the anchor ear 302 can be completed. Since the positioning groove is provided in an arc shape, the positioning pin 311 does not interfere with the rotation of the rotation bracket 301.

Preferably, as shown in fig. 2, 3 and 5, the dial indicator 310 is fixed on the bottom surface of the measuring arm 306 through a mounting bracket 309, a U-shaped groove is formed on the bottom surface of the right end of the measuring arm 306, and the measuring lever 308 is hinged between two side walls of the U-shaped groove through a rotating shaft 312; the top surface of the measuring arm 306 is provided with an adjusting part 307, and the length of the adjusting part 307 in the U-shaped groove is adjustable; the measuring end of the dial gauge 310 abuts the bottom surface of the measuring lever 308. In this embodiment, the adjusting member 307 is made of a bolt or a nut, so as to facilitate the calibration of the measuring lever 308 and the dial indicator 310.

Preferably, as shown in fig. 2, 4 and 5, the positioning assembly 2 includes a top sleeve 206, a central ejector rod 201, a measuring contact piece 207, a positioning ejector block 208 and an ejector rod moving unit, a fixing base 105 is arranged on the fixing frame 103, the fixing base 105 is located right above the bottom sleeve 4, the fixing base 105 is a hollow piece, and the top sleeve 206 is mounted on the top surface of the fixing base 105; the central ejector rod 201 penetrates through the top sleeve 206 and can move up and down in the fixed seat 105 through the ejector rod moving unit, the measuring contact piece 207 and the positioning ejector block 208 are detachably arranged at the bottom end of the central ejector rod 201, and the top surface of the measuring contact piece 207 is abutted with the bottom surface of the right end of the measuring lever 308; the positioning top block 208 is abutted against the inner wall of the excircle 5 of the hollow shaft to be measured. Further, the fixing base 105 is a cylinder, and the top sleeve 206 prevents dust and impurities from entering the fixing base 105.

Further, as shown in fig. 2, 5 and 7, a threaded hole is formed in the center of the bottom end of the central ejector rod 201, a through hole is formed in the center of the measurement contact piece 207, a stud 2081 is arranged in the center of the top end of the positioning ejector block 208, and the positioning ejector block 208 and the measurement contact piece 207 are detachably connected with the central ejector rod 201 through the stud 2081, the through hole and the threaded hole. In this embodiment, the bottom surface circle diameter of the positioning top block 208 is phi 28mm, that is, when the positioning top block 208 is pressed against the inner wall of the outer circle 5 of the hollow shaft to be measured, the inner wall diameter thereof is phi 28mm (i.e., the inner wall positioning portion 502 in fig. 5).

Preferably, as shown in fig. 4 and 6, the ejector rod moving unit includes a fixed sleeve 202, a sliding sleeve 203, and a handle 205, wherein the fixed sleeve 202 is installed between the fixed seat 105 and the central ejector rod 201, and the fixed sleeve 202 is fixedly connected with the central ejector rod 201 through screws, and the number of the fixed sleeves 202 is two; the sliding sleeve 203 is sleeved on the periphery of the central ejector rod 201, the sliding sleeve 203 is arranged between the two fixed sleeves 202, and the sliding sleeve 203 is fixedly connected with the handle 205; the outer wall of the fixed seat 105 is also provided with a chute 106, and the handle 205 drives the sliding sleeve 203 to move up and down along the chute 106. In this embodiment, the sliding groove 106 is vertically opened along the extending direction of the fixing base 105, and the two ends of the sliding groove 106 are provided with locking grooves 107 along the direction perpendicular to the sliding groove 106, that is, the sliding groove 106 and the locking grooves 107 form a zigzag shape. When the central ejector rod 201 is required to be pressed down onto the inner wall of the excircle 5 of the hollow shaft to be tested, the handle 205 is pulled down along the chute 106 and then pushed into the locking groove 107 at the lower part in the vertical direction, so that the central ejector rod 201 is prevented from being pressed loose; when the outer circle 5 of the hollow shaft to be measured needs to be replaced, the handle 205 is pushed into the sliding groove 106 from the locking groove 107 at the lower part, then pushed upwards along the sliding groove 106 to the top and then pushed into the locking groove 107 at the upper part in the vertical direction, so that the central ejector rod 201 is prevented from falling downwards to interfere with the action of replacing the outer circle 5 of the hollow shaft to be measured.

Further, as shown in fig. 4, the ejector rod moving unit further includes a second compression spring 204, the upper end of the second compression spring 204 is connected to the sliding sleeve 203, and the lower end is connected to the lower fixed sleeve 202. In this embodiment, the second compression spring 204 is disposed between the sliding sleeve 203 and the lower fixing sleeve 202, so that the top surface of the sliding sleeve 203 abuts against the upper fixing sleeve 202, and when the handle 205 is pressed down to shrink the second compression spring 204, the sliding sleeve 203 can be restored to the position below the upper fixing sleeve 202 by means of the elastic force of the second compression spring 204.

Preferably, as shown in fig. 2, the fixing frame 103 includes two vertical shaft connecting pipes and a plurality of connecting frames 104, the bottom ends of the two vertical shaft connecting pipes are fixedly connected with the bottom plate 1, and the connecting frames 104 fixedly connect the two vertical shaft connecting pipes. Further, in this embodiment, two through holes are formed in the bottom plate 1 below the two vertical shaft connecting pipes, two vertical shaft heads 102 are inserted into the through holes, the top ends of the two vertical shaft heads 102 are inserted into the bottom end ports of the two vertical shaft connecting pipes, screw threads are arranged on the peripheries of the bottom ends of the two vertical shaft heads 102, and the screw threads and nuts are fastened on the bottom surface of the bottom plate 1. The number of the connecting frames 104 is two, and the connecting frames 104 are used for fixedly connecting the two vertical shaft connecting pipes and improving the strength and the bending resistance of the fixing frame 103. The two connecting frames 104 are respectively arranged at the lower part and the upper part of the vertical shaft connecting pipe, the length of the connecting frame 104 at the lower part is smaller than that of the connecting frame 104 at the upper part, the connecting frame 104 at the upper part fixedly connects the two vertical shaft connecting pipes and then extends out of the connecting frame 104 at the upper part by a certain length, and the fixing seat 105 is arranged at the extending end of the connecting frame 104 at the upper part, so that the fixing seat 105 is ensured to be arranged right above the bottom sleeve 4.

Further, in this embodiment, the through hole is further formed in the lower bottom plate 1 of the bottom sleeve 4, the periphery of the bottom sleeve 4 is provided with a protrusion, the lower end of the bottom sleeve 4 is inserted into the through hole, the protrusion is abutted to the top surface of the bottom plate 1, and bolts are fastened on the protrusion, so that the bottom sleeve 4 is guaranteed to be detachably fastened on the bottom plate 1, and the bottom sleeve 4 with different specifications can be quickly replaced for the outer circles 5 of hollow shafts to be tested with different specifications. Further, the top of the bottom sleeve 4 is provided with a bowl-shaped opening for supporting the outer wall of the excircle 5 of the hollow shaft to be tested. In this embodiment, the top bowl-shaped inner diameter of the bottom sleeve 4 is phi 40mm (i.e., the outer wall location 501 in fig. 5).

Preferably, as shown in fig. 1, the bottom surface of the bottom plate 1 is further provided with four supporting feet 101, and the supporting feet 101 can be used for leveling the bottom plate 1 by rotating and adjusting the height, so as to ensure the stability of the bottom plate 1.

Further, in this embodiment, the caliber of the top bowl shape of the bottom sleeve 4 is phi 40mm, the bottom surface circle diameter of the positioning top block 208 is phi 28mm, when the hollow shaft outer circle 5 with qualified standard wall thickness is placed in the bottom sleeve 4, the positioning top block 208 presses against the top inner wall of the standard hollow shaft outer circle 5, the distance between the phi 40mm circle and the phi 28mm circle is 8mm, and then the measuring lever 308 and the dial indicator 310 are zeroed. When the hollow shaft outer circle 5 to be measured is placed in the bottom sleeve 4, the positioning top block 208 is pressed on the top inner wall of the hollow shaft outer circle 5 to be measured, and whether the hollow shaft outer circle 5 to be measured is qualified can be judged according to the indication numbers displayed by the measuring lever 308 and the dial indicator 310. As shown in FIG. 1, the outer wall of the outer circle 5 of the standard hollow shaft in the embodiment has a circle with phi 40mm, the inner wall of the outer circle 5 of the standard hollow shaft has a circle with phi 28mm, and the distance between the two circles is 8.5mm, namely, the wall thickness is qualified. In other embodiments, according to the specification of the hollow shaft outer circle 5, the specifications of the bottom sleeve 4 and the positioning top block 208 are changed, and meanwhile, the anchor ear 302 is loosened, and the height of the rotary support 301 is adjusted, so that the hollow shaft outer circle 5 to be measured with different specifications is adapted.

The utility model relates to a measuring tool capable of rapidly detecting the outer circular wall thickness of a hollow shaft, which comprises the following steps of:

s1, as shown in FIG. 2, fixedly connecting all the components;

s2, selecting a standard qualified hollow shaft excircle 5 of the specification according to the specification of the hollow shaft excircle 5 to be detected;

s3, placing the standard qualified hollow shaft excircle 5 in the bottom sleeve 4, and enabling the outer wall of the standard qualified hollow shaft excircle 5 to be in butt joint with the bowl-shaped inner wall of the top surface of the bottom sleeve 4 (namely an outer wall positioning part 501 in FIG. 5);

s4, moving the handle 205 downwards along the sliding groove 106 into the locking groove 107 at the lower part, wherein the bottom end of the positioning top block 208 is pressed into the inner wall of the standard qualified hollow shaft excircle 5 (namely the inner wall positioning part 502 in FIG. 5);

s5, rotating the rotary support 301 to enable the right end of the measuring lever 308 to be overlapped on the top surface of the measuring contact piece 207, so that the measuring lever 308 can rotate up and down, and at the moment, the left end and the right end of the measuring lever 308 are balanced.

S6, manually rotating the standard qualified hollow shaft excircle 5, observing the pointer of the dial indicator 310, finding the minimum point of the indication number of the dial indicator 310, then zeroing the dial indicator 310, and taking out the standard qualified hollow shaft excircle 5;

s7, when the workpiece is subjected to spot inspection, the outer circle 5 of the hollow shaft to be detected is placed in the bottom sleeve 4, the outer circle 5 of the hollow shaft to be detected is manually rotated, the outer circle 5 of the hollow shaft to be detected cannot shake in the bottom sleeve 4, and the steps S4-S5 are repeated. The measuring lever 308 transmits the wall thickness of the outer circle 5 of the hollow shaft to be measured to the dial indicator 310, and whether the wall thickness of the outer circle 5 of the hollow shaft to be measured is out of tolerance can be judged by checking whether the pointer of the dial indicator 310 is in the error range of the wall thickness.

Compared with the mode of measuring the wall thickness by manually drawing lines in the prior art, the measuring tool capable of rapidly detecting the wall thickness of the outer circle of the hollow shaft, which is related to the utility model, is adopted to cut the outer circle 5 of the hollow shaft of a workpiece only once, and can be put into the measuring tool for detection, and the time is about 10 minutes. In addition, the measuring tool can be used for directly carrying out reference positioning on the excircle 5 of the hollow shaft to be measured, so that errors are reduced.

In conclusion, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims (10)

1. A measuring tool capable of rapidly detecting the outer circular wall thickness of a hollow shaft is characterized in that: the device comprises a bottom plate (1), a fixing frame (103), a detection measuring tool (3), a positioning assembly (2) and a bottom sleeve (4), wherein the fixing frame (103) and the bottom sleeve (4) are all installed on the bottom plate (1), the positioning assembly (2) is arranged on the fixing frame (103) and is positioned right above the bottom sleeve (4), the bottom sleeve (4) is used for supporting the outer wall of an excircle (5) of a hollow shaft to be detected, and the bottom end of the positioning assembly (2) is in butt joint with the inner wall of the excircle (5) of the hollow shaft to be detected; the measuring tool (3) comprises a rotary support (301), a measuring arm (306), a measuring lever (308) and a dial indicator (310), wherein the rotary support (301) is rotatably sleeved on a fixing frame (103), the height of the rotary support (301) is adjustable, the measuring arm (306) is fixed on the rotary support (301), the measuring lever (308) is arranged in the measuring arm (306), one end bottom surface of the measuring lever (308) is abutted to the measuring end of the dial indicator (310), and the other end bottom surface of the measuring lever (308) is abutted to the positioning assembly (2).

2. The measuring tool capable of rapidly detecting the outer circular wall thickness of the hollow shaft according to claim 1, wherein the measuring tool is characterized in that: a hoop (302) is further arranged between the rotary support (301) and the fixing frame (103), and the hoop (302) can be locked on the periphery of the fixing frame (103); the rotary support (301) is sleeved on the hoop (302) and can rotate around the hoop (302), a shield (303) is arranged on the upper side of the rotary support (301), a first compression spring (305) is arranged between the shield (303) and the rotary support (301), the top end of the first compression spring (305) is connected with the shield (303), and the bottom end of the first compression spring (305) is connected with the rotary support (301).

3. The measuring tool capable of rapidly detecting the outer circular wall thickness of the hollow shaft according to claim 1, wherein the measuring tool is characterized in that: the dial indicator (310) is fixed on the bottom surface of the measuring arm (306) through a mounting frame (309), a U-shaped groove is formed in the measuring arm (306), and the measuring lever (308) is hinged between two side walls of the U-shaped groove; the top surface of the measuring arm (306) is provided with an adjusting piece (307), and the length of the adjusting piece (307) in the U-shaped groove is adjustable; the measuring end of the dial indicator (310) is abutted with the bottom surface of the measuring lever (308).

4. The measuring tool capable of rapidly detecting the outer circular wall thickness of the hollow shaft according to claim 1, wherein the measuring tool is characterized in that: the positioning assembly (2) comprises a top sleeve (206), a central ejector rod (201), a measuring contact piece (207), a positioning ejector block (208) and an ejector rod moving unit, wherein a fixing seat (105) is arranged on the fixing frame (103), the fixing seat (105) is positioned right above the bottom sleeve (4), the fixing seat (105) is a hollow piece, and the top sleeve (206) is arranged on the top surface of the fixing seat (105); the center ejector rod (201) penetrates through the top sleeve (206) and can move up and down in the fixed seat (105) through the ejector rod moving unit, the measuring contact piece (207) and the positioning ejector block (208) are detachably arranged at the bottom end of the center ejector rod (201), and the top surface of the measuring contact piece (207) is abutted to the bottom surface of one end, far away from the dial indicator (310), of the measuring lever (308); the positioning top block (208) is abutted against the inner wall of the excircle (5) of the hollow shaft to be detected.

5. The measuring tool capable of rapidly detecting the outer circular wall thickness of the hollow shaft according to claim 4, wherein the measuring tool is characterized in that: the bottom of the center ejector rod (201) is provided with a threaded hole, the measuring contact piece (207) is provided with a through hole, the top end of the positioning ejector block (208) is provided with a stud (2081), and the positioning ejector block (208) and the measuring contact piece (207) are detachably connected with the center ejector rod (201) through the stud (2081), the through hole and the threaded hole.

6. The measuring tool capable of rapidly detecting the outer circular wall thickness of the hollow shaft according to claim 4, wherein the measuring tool is characterized in that: the ejector rod moving unit comprises a fixed sleeve (202), a sliding sleeve (203) and a handle (205), wherein the fixed sleeve (202) is arranged between a fixed seat (105) and a central ejector rod (201), the fixed sleeve (202) is fixedly connected with the central ejector rod (201), and the number of the fixed sleeves (202) is two; the sliding sleeve (203) is sleeved on the periphery of the central ejector rod (201), the sliding sleeve (203) is arranged between the two fixed sleeves (202), and the sliding sleeve (203) is fixedly connected with the handle (205); the outer wall of the fixed seat (105) is also provided with a sliding groove (106), and the handle (205) drives the sliding sleeve (203) to move up and down along the sliding groove (106).

7. The measuring tool capable of rapidly detecting the outer circular wall thickness of the hollow shaft according to claim 6, wherein: the sliding groove (106) is formed along the extending direction of the fixing seat (105), and locking grooves (107) are formed at two ends of the sliding groove (106) along the direction perpendicular to the sliding groove (106).

8. The measuring tool capable of rapidly detecting the outer circular wall thickness of the hollow shaft according to claim 6, wherein: the ejector rod moving unit further comprises a second compression spring (204), one end of the second compression spring (204) is connected with the sliding sleeve (203), and the other end of the second compression spring is connected with any one of the fixed sleeves (202).

9. The measuring tool capable of rapidly detecting the outer circular wall thickness of the hollow shaft according to claim 1, wherein the measuring tool is characterized in that: the fixing frame (103) comprises two vertical shaft connecting pipes and a plurality of connecting frames (104), the bottom ends of the two vertical shaft connecting pipes are fixedly connected with the bottom plate (1), and the two vertical shaft connecting pipes are fixedly connected by the connecting frames (104).

10. The measuring tool capable of rapidly detecting the outer circular wall thickness of the hollow shaft according to claim 1, wherein the measuring tool is characterized in that: the bottom surface of the bottom plate (1) is also provided with supporting feet (101).

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