Portable handheld roundness measuring instrument

Abstract

The utility model discloses a portable handheld roundness measuring instrument in the technical field of roundness measuring machinery, which comprises two groups of rectangular blocks symmetrically arranged at the top of a measuring arm, a handle fixedly mounted between the two groups of rectangular blocks, a grease fitting fixedly mounted at the top of the measuring arm, and a shaft hole formed in the middle of the outer wall of the measuring arm, a bushing is fixedly installed in a shaft hole of the measuring arm, a group of saddle frames are fixedly installed right in front of and right behind the measuring arm, and a level bubble is fixedly installed at the top of the outer wall right in front of the saddle frames and is fixedly installed on the outer wall of the saddle frames through a cross screw in a penetrating mode. The front measuring arm sliding ruler and the rear measuring arm sliding ruler are matched with the measuring arm telescopic sliding ruler to achieve a telescopic mode, the device has high selectivity during operation, by using fastening knobs at multiple positions, the adjustable range is widened, operation is convenient, an operator can conveniently debug the device before operation, and the device has good market prospects.

Description

TECHNICAL FIELD

[0001] The utility model relates to roundness measurement mechanical technical field, concretely is a kind of portable hand-held roundness measuring instrument. BACKGROUND

[0002] Steel is important engineering material in our national economy, and strip material occupies important position in steel product, and one of the most important measuring standards of strip material quality is shape, and the most direct factor determining shape quality is roll shape of rolling mill, so the accuracy of roll shape geometry plays a vital role in the quality production of strip steel product. At present, the roll shape of strip steel designed is the roll, which is ground after the convexity, concavity, wave (S type), taper and other geometric parameters along the length direction of roll body under the premise of ensuring the roundness of each cross section of roll body, can meet the requirements of these design parameters, and must be inspected by certain measuring means.

[0003] Many domestic enterprises still use traditional measuring instrument to obtain roll shape surface roundness information, but this method has many problems in measuring roll shape surface roundness information, and roll shape often needs to be measured in field measurement process, the existing roll shape instrument mainly measures roll diameter by contact type of dial gauge, and the precision is limited and easily affected by vibration in use process, and when repeatedly measuring the same roll, the accuracy of repeated measurement is poor due to long time hand holding of heavy instrument, and users need to have higher use skills, and disassembly, storage and carrying are inconvenient.

[0004] Therefore, the utility model designs a kind of portable hand-held roundness measuring instrument to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of portable hand-held roundness measuring instrument to solve the information of roll shape surface roundness obtained by traditional measuring instrument in the background art, the accuracy of repeated measurement is poor due to long time hand holding of heavy instrument, and users need to have higher use skills, and disassembly, storage and carrying are inconvenient.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: A portable hand -held roundness measuring instrument, including the right end of the measuring arm outer wall is equipped with front measurement subassembly, the left end of the measuring arm outer wall is equipped with rear measurement subassembly, the both ends of the measuring arm outer wall left and right are equipped with two sets of thread hole, the bottom of the measuring arm is equipped with angle pulse encoder subassembly, the top of the measuring arm is equipped with two sets of rectangular blocks symmetrically, two sets of rectangular blocks are fixedly installed between the two sets of rectangular blocks, the top of the measuring arm is fixedly installed with grease nipple, the central part of the measuring arm outer wall is equipped with shaft hole, the bushing is fixedly installed in the shaft hole of the measuring arm, the front and back of the measuring arm are all fixedly installed with a group of saddle frame, the saddle frame outer wall is equipped with shaft hole, the saddle frame and the shaft hole of the measuring arm are fixedly installed with the rotating shaft, the bottom of the rotating shaft is equipped with the clamping groove, the rotating shaft baffle ring is fixedly installed in the bottom clamping groove of the rotating shaft, the bottom of the saddle frame is equipped with two sets of shaft holes, the two sets of shaft holes of the bottom of the saddle frame are fixedly installed with the gyro wheel shaft, the bottom of the gyro wheel shaft is equipped with the clamping groove, the gyro wheel shaft baffle ring is fixedly installed in the bottom clamping groove of the gyro wheel shaft, the gyro wheel shaft is detachable, the gyro wheel shaft top and the front end of the saddle frame are all equipped with two sets of bearing gyro wheel, the gyro wheel shaft bottom and the rear end of the saddle frame are all fixedly installed with two sets of bearing gyro wheel, the gyro wheel shaft and bearing gyro wheel rotate and cooperate, the bearing gyro wheel is rotatable relative to the gyro wheel shaft, the top of the front of the saddle frame outer wall is equipped with two sets of thread hole, the top of the front of the saddle frame outer wall is fixedly installed with level bubble, the level bubble is fixedly installed with cross screw in the saddle frame outer wall.

[0007] Preferably, the front measurement subassembly, including the right end of the measuring arm is fixedly installed with the front measurement arm sliding ruler, the left upper side of the front measurement arm sliding ruler outer wall is equipped with two sets of thread hole, the right end of the measuring arm two sets of thread hole and the left upper side of the front measurement arm sliding ruler thread hole type cooperate, the left upper side of the front measurement arm sliding ruler and the two sets of thread hole of the right end of the measuring arm are all fixedly installed with two sets of internal hexagonal screw, the front measurement arm sliding ruler is detachable, the top of the front measurement arm sliding ruler is equipped with anti -skid line, the inside of the front measurement arm sliding ruler is equipped with rectangular chamber, the left side of the front measurement arm sliding ruler is equipped with rectangular recess, the rectangular chamber is equipped with the measuring arm telescopic sliding ruler, the measuring arm telescopic sliding ruler and the front measurement arm sliding ruler sliding cooperation, the measuring arm telescopic sliding ruler is detachable, the front end of the measuring arm telescopic sliding ruler is equipped with telescopic ruler thread hole, the telescopic ruler thread hole is movably installed with sliding ruler fastening knob, the sliding ruler fastening knob and rectangular recess are mutually matched, the sliding ruler fastening knob is detachable, the right end of the front measurement arm sliding ruler and the measuring arm telescopic sliding ruler are all equipped with scale line, the front measurement arm sliding ruler is equipped with sensor subassembly.

[0008] Preferably, the rear measuring component comprises a rear measuring arm slide ruler fixedly installed at the left end of the measuring arm, two sets of screw holes are formed in the upper right side of the outer wall of the rear measuring arm slide ruler, the screw holes at the left end of the measuring arm and the screw holes at the upper right side of the rear measuring arm slide ruler are matched in type, two sets of inner hexagonal screws are penetrated and installed in the screw holes at the left end of the measuring arm and the screw holes at the upper right side of the rear measuring arm slide ruler, the rear measuring arm slide ruler is detachable, anti-skid lines are formed on the top of the rear measuring arm slide ruler, a rectangular cavity is formed in the interior of the rear measuring arm slide ruler, a rectangular groove is formed in the left side of the rear measuring arm slide ruler, a measuring arm telescopic slide ruler is arranged in the rectangular cavity, the measuring arm telescopic slide ruler is in sliding fit with the rear measuring arm slide ruler, the measuring arm telescopic slide ruler is detachable, a telescopic slide ruler screw hole is arranged at the front end of the measuring arm telescopic slide ruler, a slide ruler fastening knob is movably installed in the telescopic slide ruler screw hole, the slide ruler fastening knob is matched with the rectangular groove, the slide ruler fastening knob is detachable, scale lines are arranged at the right ends of the rear measuring arm slide ruler and the measuring arm telescopic slide ruler, and a plummet component is arranged on the rear measuring arm slide ruler.

[0009] Preferably, the angle measuring pulse encoder component comprises an angle measuring pulse encoder fixedly installed at the bottom of the measuring arm, an encoder data line is connected to the end of the angle measuring pulse encoder, and an encoder plug is fixedly installed at the end of the encoder data line.

[0010] Preferably, the sensor component comprises a micrometer sensor slide base movably installed on the outer wall of the front measuring arm slide ruler, the micrometer sensor slide base is in sliding fit with the front measuring arm slide ruler, the micrometer sensor slide base is detachable, a slide base screw hole is formed on the top of the micrometer sensor slide base, a slide base fastening knob is movably installed in the slide base screw hole, the slide base fastening knob is detachable, a micrometer sensor hole is formed in the bottom of the micrometer sensor slide base, a micrometer sensor is movably installed in the micrometer sensor hole, a sensor screw hole is formed in the left side outer wall of the micrometer sensor hole, a micrometer sensor fastening knob is movably installed in the sensor screw hole, the micrometer sensor fastening knob is detachable, a micrometer sensor data line is fixedly connected to the end of the micrometer sensor, and a micrometer sensor plug is fixedly connected to the bottom of the micrometer sensor data line.

[0011] Preferably, the plummet component comprises a plummet slide base movably installed on the outer wall of the rear measuring arm slide ruler, the plummet slide base is in sliding fit with the rear measuring arm slide ruler, the plummet slide base is detachable, a slide base screw hole is formed on the top of the plummet slide base, a slide base fastening knob is movably installed in the slide base screw hole, the slide base screw hole is in screw fit with the slide base fastening knob, the slide base fastening knob is detachable, a plummet screw hole is formed in the bottom of the plummet slide base, a force measuring plummet is movably installed in the plummet screw hole, the force measuring plummet is in screw fit with the plummet screw hole, and the force measuring plummet is detachable.

[0012] Preferably, the angle measuring pulse encoder adopts ECN113-2048 pulse encoder, the micrometer sensor adopts CARLEN magnetostrictive displacement sensor CHM-M250N005-15862H, the micrometer sensor plug is connected with the corresponding jack of the instrument, and the encoder plug is connected with the corresponding jack of the instrument.

[0013] Compared with the prior art, the utility model has the advantages that: the handle is installed on the measuring arm, ensuring safety during operation, and the device can be carried by hand, having good portability; the front and rear measuring arm sliding rulers and the telescopic sliding ruler of the measuring arm are in sliding cooperation, having telescopic property, and the device has high selectivity during operation and good convenience during non-operation; the device has a graduated measuring arm sliding ruler and a rollable saddle frame, allowing the measuring range of the instrument to be adjusted, and the device is easy to operate and stable in measurement; the adjustable range and operation convenience are improved by the plurality of locking knobs, and the device is convenient for the operator to debug before operation. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0015] Figure 1 It is the shaft angle structure schematic diagram of the utility model;

[0016] Figure 2 It is the overhead view structure schematic diagram of the utility model;

[0017] Figure 3 It is the upward view structure schematic diagram of the utility model;

[0018] Figure 4 It is the overhead view full section structure schematic diagram of the utility model;

[0019] Figure 5 It is the right view structure schematic diagram of the utility model;

[0020] Figure 6 It is the local enlarged structure schematic diagram of the utility model A;

[0021] Figure 7 It is the local enlarged structure schematic diagram of the utility model B;

[0022] Figure 8 It is the front measuring assembly structure schematic diagram of the utility model;

[0023] Figure 9 is a structural schematic view of the rear measuring assembly of the utility model;

[0024] Figure 10 is a structural schematic view of the micrometer sensor of the utility model;

[0025] Figure 11 is a structural schematic view of the force measuring weight of the utility model.

[0026] In the drawings, the components represented by each reference numeral are listed as follows:

[0027] 1-measuring arm, 2-bush, 3-grease nipple, 4-saddle frame, 5-rotary shaft, 6-rotary shaft retainer, 7-level bubble, 8-bearing roller, 9-roller shaft, 10-roller shaft retainer, 11-angular measuring pulse encoder assembly, 12-angular measuring pulse encoder, 13-encoder data line, 14-encoder plug, 15-front measuring arm slide ruler, 16-measuring arm telescopic slide ruler, 17-slide ruler fastening knob, 18-micrometer sensor slide, 19-micrometer sensor, 20-micrometer sensor hole, 21-micrometer sensor fastening knob, 22-micrometer sensor data line, 23-micrometer sensor plug, 24-rear measuring arm slide ruler, 25-force measuring weight, 26-weight slide, 27-slide fastening knob, 28-weight threaded hole, 29-rectangular block, 30-rectangular groove, 31-telescopic ruler threaded hole, 32-slide threaded hole, 33-micrometer sensor threaded hole, 101-handle, 201-cross screw, 301-internal hexagonal screw, 401-scale line, 501-rectangular chamber, 601-front measuring assembly, 602-rear measuring assembly, 701-sensor assembly, 702-weight assembly. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0029] Please refer to Figures 1-11The utility model provides a technical scheme: a portable hand -held roundness measuring appearance, including that the right end of measuring arm 1 outer wall is equipped with former measurement subassembly 601, the left end of measuring arm 1 outer wall is equipped with rear measurement subassembly 602, the both ends of measuring arm 1 outer wall left and right are all seted up two groups of thread holes, and the bottom of measuring arm 1 is equipped with angle pulse encoder subassembly 11, the top of measuring arm 1 is symmetrically provided with two groups of rectangular blocks 29, and two groups of rectangular blocks 29 are fixedly installed between handle 101 is fixedly installed with grease nipple 3 in the top of measuring arm 1, the median portion of measuring arm 1 outer wall is seted up the axle hole, and the axle hole of measuring arm 1 is fixedly installed with bushing 2, and the front and rear of measuring arm 1 are all fixedly installed with a group of saddle frame 4, and the outer wall of saddle frame 4 is seted up the axle hole, and the axle hole between saddle frame 4 and measuring arm 1 is fixedly installed with the rotation axis 5 and is seted up the clamping groove in the bottom end of rotation axis 5, and the rotation axis 5 bottom clamping groove is fixedly installed with rotation axis baffle ring 6, and the bottom of saddle frame 4 is equipped with two groups of axle holes, and the axle hole of two groups of saddle frame 4 bottom is fixedly installed with gyro wheel axle 9, and the bottom of gyro wheel axle 9 is seted up the clamping groove, and the gyro wheel axle 9 bottom clamping groove is fixedly installed with rotation axis baffle ring 6, and gyro wheel axle 9 is detachable, and the top end of gyro wheel axle 9 and the front end of saddle frame 4 are all equipped with two groups of bearing gyro wheel 8, and the bottom end of gyro wheel axle 9 and the rear end of saddle frame 4 are all fixedly installed with two groups of bearing gyro wheel 8, and gyro wheel axle 9 and bearing gyro wheel 8 rotate and cooperate, and bearing gyro wheel 8 is rotatable relative to gyro wheel axle 9, and the top of the front outer wall of saddle frame 4 is seted up two groups of screw holes, and the top of the front outer wall of saddle frame 4 is fixedly installed with level bubble 7, and level bubble 7 is fixedly installed with cross screw in the outer wall of saddle frame 4, former measurement subassembly 601, including that the right end of measuring arm 1 is fixedly installed with former measurement arm sliding ruler 15, the left top of former measurement arm sliding ruler 15 outer wall is seted up two groups of screw holes, and the right end two groups of screw holes of measuring arm 1 and the left top screw hole type of former measurement arm sliding ruler 15 cooperation, and the left top of former measurement arm sliding ruler 15 and the two groups of screw holes of the right end of measuring arm 1 are all fixedly installed with two groups of inner hexagonal screw 301, and former measurement arm sliding ruler 15 is detachable, and the top of former measurement arm sliding ruler 15 is seted up antiskid line, and the inside of former measurement arm sliding ruler 15 is seted up rectangular chamber 501, and the left side of former measurement arm sliding ruler 15 is seted up rectangular recess 30, and the inside of rectangular chamber 501 is equipped with measuring arm telescopic sliding ruler 16, and measuring arm telescopic sliding ruler 16 and former measurement arm sliding ruler 15 sliding cooperation, and measuring arm telescopic sliding ruler 16 is detachable, and the front end of measuring arm telescopic sliding ruler 16 is equipped with telescopic ruler screw hole 31, and telescopic ruler screw hole 31 is movably installed with sliding ruler fastening knob 17, and sliding ruler fastening knob 17 and rectangular recess 30 are mutually matched, and sliding ruler fastening knob 17 is detachable, and the right end of former measurement arm sliding ruler 15 and measuring arm telescopic sliding ruler 16 is all equipped with scale line 401, and former measurement arm sliding ruler 15 is equipped with sensor assembly 701, and rear measurement subassembly 602, including that the left end of measuring arm 1 is fixedly installed with rear measurement arm sliding ruler 24, the right top of rear measurement arm sliding ruler 24 outer wall is seted up two groups of screw holes, and the left end two groups of screw holes of measuring arm 1 and the right top screw hole type of rear measurement arm sliding ruler 24 cooperation,Two sets of inner hexagonal screws 301 are installed through two sets of threaded holes on the upper right of the rear measuring arm sliding ruler 24 and the left end of the measuring arm 1, the rear measuring arm sliding ruler 24 is detachable, the top of the rear measuring arm sliding ruler 24 is provided with anti-skid lines, the inside of the rear measuring arm sliding ruler 24 is provided with a rectangular cavity 501, the left side of the rear measuring arm sliding ruler 24 is provided with a rectangular groove 30, the rectangular cavity 501 is provided with a measuring arm telescopic sliding ruler 16, the measuring arm telescopic sliding ruler 16 is in sliding fit with the rear measuring arm sliding ruler 24, the measuring arm telescopic sliding ruler 16 is detachable, the front end of the measuring arm telescopic sliding ruler 16 is provided with a telescopic ruler threaded hole 31, a sliding ruler fastening knob 17 is movably installed in the telescopic ruler threaded hole 31, the sliding ruler fastening knob 17 is in mutual fit with the rectangular groove 30, the sliding ruler fastening knob 17 is detachable, the right end of the rear measuring arm sliding ruler 24 and the measuring arm telescopic sliding ruler 16 is provided with a scale line 401, the rear measuring arm sliding ruler 24 is provided with a plummet assembly 702, an angle measuring pulse encoder assembly 11 comprises an angle measuring pulse encoder 12 fixedly installed at the bottom of the measuring arm 1, an encoder data line 13 connected to the end of the angle measuring pulse encoder 12, an encoder plug 14 fixedly installed at the end of the encoder data line 13, a sensor assembly 701 comprises a micrometer sensor sliding seat 18 movably installed on the outer wall of the front measuring arm sliding ruler 15, the micrometer sensor sliding seat 18 is in sliding fit with the front measuring arm sliding ruler 15, the micrometer sensor sliding seat 18 is detachable, the top of the micrometer sensor sliding seat 18 is provided with a sliding seat threaded hole 32, a sliding seat fastening knob 27 is movably installed in the sliding seat threaded hole 32, the sliding seat fastening knob 27 is detachable, the bottom of the micrometer sensor sliding seat 18 is provided with a micrometer sensor hole 20, a micrometer sensor 19 is movably installed in the micrometer sensor hole 20, a sensor threaded hole 33 is provided on the outer wall of the left side of the micrometer sensor hole 20, a micrometer sensor fastening knob 21 is movably installed in the sensor threaded hole 33, the micrometer sensor fastening knob 21 is detachable, a micrometer sensor data line 22 is fixedly connected to the end of the micrometer sensor 19, a micrometer sensor plug 23 is fixedly connected to the bottom of the micrometer sensor data line 22, the plummet assembly 702 comprises a plummet sliding seat 26 movably installed on the outer wall of the rear measuring arm sliding ruler 24, the plummet sliding seat 26 is in sliding fit with the rear measuring arm sliding ruler 24, the plummet sliding seat 26 is detachable, the top of the plummet sliding seat 26 is provided with a sliding seat threaded hole 32, a sliding seat fastening knob 27 is movably installed in the sliding seat threaded hole 32, the sliding seat threaded hole 32 is in screw fit with the sliding seat fastening knob 27, the sliding seat fastening knob 27 is detachable, the bottom of the plummet sliding seat 26 is provided with a plummet threaded hole 28, a force plummet 25 is movably installed in the plummet threaded hole 28, the force plummet 25 is in screw fit with the plummet threaded hole 28, the force plummet 25 is detachable, the angle measuring pulse encoder 12 adopts an ECN113-2048 pulse encoder, the micrometer sensor 19 adopts a CARLEN magnetic strain displacement sensor CHM-M250N005-15862H, the micrometer sensor plug 23 is connected with a corresponding jack of an instrument, the encoder plug 14 is connected with a corresponding jack of an instrument.

[0030] Among them, the front measuring arm slide ruler 15 and the rear measuring arm slide ruler 24 are made of magnesium-aluminum alloy, which is light and portable, not easy to deform, has high strength and hardness, the measuring arm 1 and the saddle frame 4 are also made of aluminum alloy, which has high strength, light weight, corrosion resistance, good casting performance and plastic processing performance, the hand-held end surface of the slide ruler fixing knob 17 and the slide seat fixing knob 28 is made of ABS engineering plastic, which has high strength, wear resistance and good toughness, the knob surface made of this material is smooth and has good hand feeling, is not easy to wear, has wide application range, and is commonly used due to moderate price. The hand-held 101 is made of industrial rubber plate, which is mainly made of rubber and contains fabric, metal sheet and other reinforcing materials, the angle measuring pulse encoder 12 is an ECN113-2048 pulse encoder, which has high precision, high reliability, high dynamic performance, simple operation, high efficiency, the micrometer sensor 19 is a CARLEN magnetostrictive displacement sensor CHM-M250N005-15862H widely used on the market, which has high sensitivity, high precision, simple structure and non-contact measurement mode, long service life and can adapt to different environmental temperature and humidity conditions.

[0031] One specific application of the embodiment is: the utility model discloses a bushing 2 is installed in the middle shaft hole of the measuring arm 1, two pieces of saddle frame 4 are placed on the left and right sides of the measuring arm 1, the rotary shaft 5 is used to be connected in the bushing 2 hole of the measuring arm 1, the rotary shaft baffle ring 6 is used to be clamped at the shaft end groove, the top of the measuring arm 1 is provided with a grease filling hole and is equipped with a grease nozzle 3, the grease is filled to be used to lubricate the bushing 2, the top of the measuring arm 1 has two groups of symmetrical rectangular blocks 29 for installing the handle 101, the handle 101 is installed in the middle part of the top of the measuring arm 1 to facilitate the operator to hold the device, four bearing rollers 8 are installed on the left and right sides of the bottom of the saddle frame 4, the roller shaft 9 is used to be connected in the shaft end groove of the bottom of the saddle frame 4, and the roller shaft baffle ring 10 is used to be clamped, which is convenient for replacing the bearing roller 8 in the later period, the right end of the bottom of the saddle frame 4 is equipped with a side angle encoder assembly 11, the side angle encoder assembly 11 is an angle pulse encoder 12, an encoder data line 13 and an encoder plug 14, the encoder plug 14 is connected with the corresponding hole position of the instrument, the level bubble 7 is fixed in the surface screw hole of the saddle frame 4 by using two cross screws 201, four internal hexagonal screws 301 are used to connect the front measuring arm sliding ruler 15 and the rear measuring arm sliding ruler 24 with the left and right end screw holes of the measuring arm 1 respectively, and the internal hexagonal screws 301 are tightened, the front measuring arm sliding ruler 15 and the rear measuring arm sliding ruler 24 are all engraved with scale lines 401 on the right end of the measuring arm telescopic sliding ruler 12, the front measuring arm sliding ruler 15 and the rear measuring arm sliding ruler 24 are all provided with rectangular cavities 501, the rectangular recesses 30 are formed on the left side of the front measuring arm sliding ruler 15 and the rear measuring arm sliding ruler 24, the telescopic ruler screw hole 301 is arranged at the bottom of the measuring arm telescopic sliding ruler 12, the measuring arm telescopic sliding ruler 12 is installed in the rectangular cavities 501 of the front measuring arm sliding ruler 15 and the rear measuring arm sliding ruler 24 respectively, the measuring arm telescopic sliding ruler 12 is slidably connected with the front measuring arm sliding ruler 15 and the rear measuring arm sliding ruler 24, has telescopic property, the length can be adjusted by using the sliding ruler fastening knob 17, the micrometer sensor data line 22 and the micrometer sensor plug 23 are connected with the bottom end of the micrometer sensor 19, the micrometer sensor plug 23 is connected with the corresponding hole position of the instrument, the micrometer sensor and the sliding seat are used to install the micrometer sensor 19 in the micrometer sensor hole 20 at the bottom of the micrometer sensor sliding seat 18, the micrometer sensor screw hole 33 is formed in the bottom of the micrometer sensor sliding seat 18, the micrometer sensor fastening knob 21 can be used to adjust it, the sliding seat screw hole 32 is formed in the top of the micrometer sensor sliding seat 18, the micrometer sensor sliding seat 18 can be directly installed on the front measuring arm sliding ruler 15, the sliding seat fastening knob 27 is used to adjust its position, the force weight 25 is provided with a thread at the bottom end, is matched with the weight screw hole 28 at the bottom of the weight sliding seat 26 and can be directly selected and adjusted, the sliding seat screw hole 32 is formed in the top of the weight sliding seat 26, the weight sliding seat 26 can be directly installed on the rear measuring arm sliding ruler 24, the sliding seat fastening knob 27 is used to adjust its position, the device is assembled by multiple components for portability,In assembly, each slide fastening knob 27 is tightened, the inner hexagonal screw 301, the force weight 25, the micrometer sensor 19, the angular pulse encoder 12, etc. are frequently checked to prevent falling off. The device should be assembled in advance when used. The hand-held handle 101 places the device on the measured roll shaft diameter. According to the size of the measured roll diameter, the measuring arm telescopic slide ruler 16 or the weight slide 26 and the micrometer sensor slide 18 is adjusted to the appropriate position and aligned. Then the corresponding slide fastening knob 27 is tightened. The angular encoder connecting plug 14 and the micrometer sensor connecting plug 23 are connected to the corresponding sockets of the electrical box respectively. The electrical box is connected to 220V power supply. The instrument is in "debugging" state after starting. The device is placed directly above the measured roll. The bubbles in the level bubble 7 are basically centered. The four bearing rollers 8 of the saddle frame 4 and the angular pulse encoder 12 roller are in contact with the surface of the measured roll. Then the micrometer sensor fastening knob 21 is loosened. The front and rear adjustment of the micrometer sensor 19 in the middle position of the working state ensures the measurement accuracy of the instrument. The selected sensor has a small measurement stroke of 0-0.48mm. The adjustment should be careful during operation to ensure that it is within the working stroke range. The micrometer sensor fastening knob 19 is tightened. The instrument is adjusted to "measurement" state. The "roll number" and "measurement parameters" are input. The hand-held device handle 101 is started. The measured roll is slowly rotated. The "measurement start" key is pressed. The device and the measured roll rotate relative to each other. The instrument automatically collects measurement data. After half a rotation, the "measurement mode" stops. The computer processes the measurement data and displays the measurement results and the roundness curve on the display screen. The device displays the data of the maximum value, the minimum value and the position of the measured roundness curve, etc. on the display screen. The design principle of the device is that the device rolls on the measured roll during operation. The hand-held handle 101 should be careful to prevent the device from falling off the roll. After the device is disassembled, it is checked whether the parts are missing to prevent the device from not being able to be used normally due to the lack of parts next time. The main part of the device is made of aluminum alloy, which is lighter than the old measuring equipment. The handle is installed on the measuring arm to ensure safety during operation. The device can be carried by hand when not in operation, which has good portability. The front and rear measuring arm slides cooperate with the measuring arm telescopic slide ruler to have a telescopic way, which has high selectability during operation and good convenience when not in operation. The device with the graduated measuring arm slide and the rollable saddle frame makes the instrument measurement range adjustable and easy to operate and measure stably. The use of the fastening knobs improves the adjustable range and the operation convenience, which is convenient for the operator to debug the device before operation and has good market prospects.

[0032] In the description of the specification, the description of the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0033] The preferred embodiments of the utility model disclosed above are only used for helping to explain the utility model. The preferred embodiments do not describe all the details exhaustively, and also do not limit the utility model to only the specific implementation manners described. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that the persons skilled in the art can well understand and utilize the utility model. The utility model is limited only by the claims and the entire scope and equivalents thereof.

Claims

1. A portable hand-held roundness measuring instrument comprising a measuring arm (1), characterized in that: The front measuring assembly (601) is arranged at the right end of the outer wall of the measuring arm (1), the rear measuring assembly (602) is arranged at the left end of the outer wall of the measuring arm (1), two groups of threaded holes are arranged at the left and right ends of the outer wall of the measuring arm (1), the angle pulse encoder assembly (11) is arranged at the bottom of the measuring arm (1), two groups of rectangular blocks (29) are symmetrically arranged at the top of the measuring arm (1), the handle (101) is fixedly installed between the two groups of rectangular blocks (29), the grease nipple (3) is fixedly installed at the top of the measuring arm (1), the shaft hole is arranged in the middle of the outer wall of the measuring arm (1), the bushing (2) is fixedly installed in the shaft hole of the measuring arm (1), the saddle frame (4) is fixedly installed in front of and behind the measuring arm (1), the shaft hole is arranged in the outer wall of the saddle frame (4), the rotating shaft (5) is fixedly installed in the shaft hole of the saddle frame (4) and the shaft hole of the measuring arm (1), the clamping groove is arranged at the bottom end of the rotating shaft (5), the rotating shaft baffle (6) is fixedly installed in the clamping groove at the bottom of the rotating shaft (5), the two groups of shaft holes are arranged at the bottom of the saddle frame (4), the roller shaft (9) is fixedly installed in the two groups of shaft holes at the bottom of the saddle frame (4), the clamping groove is arranged at the bottom end of the roller shaft (9), the rotating shaft baffle (6) is fixedly installed in the clamping groove at the bottom of the roller shaft (9), the roller shaft (9) is detachable, the two groups of bearing rollers (8) are arranged between the top end of the roller shaft (9) and the front end of the saddle frame (4), the two groups of bearing rollers (8) are fixedly installed between the bottom end of the roller shaft (9) and the rear end of the saddle frame (4), the roller shaft (9) is rotatably connected with the bearing roller (8), the bearing roller (8) is rotatable relative to the roller shaft (9), the two groups of threaded holes are arranged at the top of the outer wall of the front of the saddle frame (4), the bubble level (7) is fixedly installed at the top of the outer wall of the front of the saddle frame (4), and the bubble level (7) is fixedly installed in the outer wall of the saddle frame (4) by the cross screw.

2. A portable hand-held roundness measuring instrument according to claim 1, characterized in that: The front measuring component (601) comprises a front measuring arm sliding ruler (15) fixedly installed at the right end of the measuring arm (1), two groups of screw holes are formed in the upper left side of the outer wall of the front measuring arm sliding ruler (15), the two groups of screw holes at the right end of the measuring arm (1) and the screw hole type at the upper left side of the front measuring arm sliding ruler (15) are matched, two groups of inner hexagonal screws (301) are penetrated and installed in the two groups of screw holes at the upper left side of the front measuring arm sliding ruler (15) and the right end of the measuring arm (1), the front measuring arm sliding ruler (15) is detachable, anti-skid lines are formed in the top of the front measuring arm sliding ruler (15), a rectangular cavity (501) is formed in the inside of the front measuring arm sliding ruler (15), a rectangular groove (30) is formed in the left side of the front measuring arm sliding ruler (15), a measuring arm telescopic sliding ruler (16) is arranged in the rectangular cavity (501), the measuring arm telescopic sliding ruler (16) is in sliding cooperation with the front measuring arm sliding ruler (15), the measuring arm telescopic sliding ruler (16) is detachable, a telescopic ruler screw hole (31) is arranged at the front end of the measuring arm telescopic sliding ruler (16), a sliding ruler fastening knob (17) is movably installed in the telescopic ruler screw hole (31), the sliding ruler fastening knob (17) is in cooperation with the rectangular groove (30), the sliding ruler fastening knob (17) is detachable, the right end of the front measuring arm sliding ruler (15) and the measuring arm telescopic sliding ruler (16) is provided with a scale line (401), and a sensor component (701) is arranged on the front measuring arm sliding ruler (15).

3. The portable hand-held roundness measuring instrument according to claim 1, wherein: The rear measuring component (602) comprises a rear measuring arm sliding ruler (24) fixedly installed at the left end of the measuring arm (1), two groups of screw holes are formed in the upper right side of the outer wall of the rear measuring arm sliding ruler (24), the two groups of screw holes at the left end of the measuring arm (1) and the screw hole type at the upper right side of the rear measuring arm sliding ruler (24) are matched, two groups of inner hexagonal screws (301) are penetrated and installed in the two groups of screw holes at the upper right side of the rear measuring arm sliding ruler (24) and the left end of the measuring arm (1), the rear measuring arm sliding ruler (24) is detachable, anti-skid lines are formed in the top of the rear measuring arm sliding ruler (24), a rectangular cavity (501) is formed in the inside of the rear measuring arm sliding ruler (24), a rectangular groove (30) is formed in the left side of the rear measuring arm sliding ruler (24), a measuring arm telescopic sliding ruler (16) is arranged in the rectangular cavity (501), the measuring arm telescopic sliding ruler (16) is in sliding cooperation with the rear measuring arm sliding ruler (24), the measuring arm telescopic sliding ruler (16) is detachable, a telescopic ruler screw hole (31) is arranged at the front end of the measuring arm telescopic sliding ruler (16), a sliding ruler fastening knob (17) is movably installed in the telescopic ruler screw hole (31), the sliding ruler fastening knob (17) is in cooperation with the rectangular groove (30), the sliding ruler fastening knob (17) is detachable, the right end of the rear measuring arm sliding ruler (24) and the measuring arm telescopic sliding ruler (16) is provided with a scale line (401), and a weight component (702) is arranged on the rear measuring arm sliding ruler (24).

4. The portable hand-held roundness measuring instrument according to claim 2, wherein: The angle measuring pulse encoder assembly (11) comprises an angle measuring pulse encoder (12) fixedly installed at the bottom of the measuring arm (1), an encoder data line (13) connected to the end of the angle measuring pulse encoder (12), and an encoder plug (14) fixedly installed at the end of the encoder data line (13).

5. A portable hand-held roundness measuring instrument according to claim 4, wherein: The sensor assembly (701) comprises a micrometer sensor slide seat (18) movably installed on the outer wall of the front measuring arm slide ruler (15), and the micrometer sensor slide seat (18) is in sliding fit with the front measuring arm slide ruler (15). The micrometer sensor slide seat (18) is detachable, and a slide seat threaded hole (32) is formed in the top of the micrometer sensor slide seat (18). A slide seat fastening knob (27) is movably installed in the slide seat threaded hole (32). The slide seat fastening knob (27) is detachable. A micrometer sensor hole (20) is formed in the bottom of the micrometer sensor slide seat (18). A micrometer sensor (19) is movably installed in the micrometer sensor hole (20). A sensor threaded hole (33) is formed in the left outer wall of the micrometer sensor hole (20). A micrometer sensor fastening knob (21) is movably installed in the sensor threaded hole (33). The micrometer sensor fastening knob (21) is detachable. A micrometer sensor data line (22) is fixedly connected to the end of the micrometer sensor (19). A micrometer sensor plug (23) is fixedly connected to the bottom of the micrometer sensor data line (22).

6. A portable hand-held roundness measuring instrument according to claim 3, wherein: The weight assembly (702) comprises a weight slide seat (26) movably installed on the outer wall of the rear measuring arm slide ruler (24), and the weight slide seat (26) is in sliding fit with the rear measuring arm slide ruler (24). The weight slide seat (26) is detachable. A slide seat threaded hole (32) is formed in the top of the weight slide seat (26). A slide seat fastening knob (27) is movably installed in the slide seat threaded hole (32). The slide seat threaded hole (32) is in screw fit with the slide seat fastening knob (27). The slide seat fastening knob (27) is detachable. A weight threaded hole (28) is formed in the bottom of the weight slide seat (26). A force measuring weight (25) is movably installed in the weight threaded hole (28). The force measuring weight (25) is in screw fit with the weight threaded hole (28). The force measuring weight (25) is detachable.

7. A portable hand-held roundness measuring instrument according to claim 5, wherein: The angle measuring pulse encoder (12) is an ECN113-2048 pulse encoder. The micrometer sensor (19) is a CARLEN magnetostrictive displacement sensor CHM-M250N005-15862H. The micrometer sensor plug (23) is connected with a corresponding jack of an instrument. The encoder plug (14) is connected with a corresponding jack of an instrument.

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