A variable diameter deep hole inner diameter measuring tool

Abstract

The present invention discloses a variable diameter deep hole inner diameter measuring tool, comprising a positioning connection module for connecting a workpiece to be measured, a measuring display module that can be placed in the deep hole of the workpiece to be measured, and a motion transfer module for carrying the measuring display module, wherein the motion transfer module is interconnected with the positioning connection module and the measuring display module respectively. The measuring display module and the motion transfer module are supported by the positioning connection module, the motion transfer module carries the measuring display module to the position to be measured of the deep hole of the workpiece to be measured, and the measuring display module completes the measurement and display of the inner diameter of the position to be measured of the deep hole. The electric inner diameter measuring tool of the present invention adopts a modular structure and a high-precision measuring unit, which can significantly improve the accuracy and efficiency of the inner diameter detection of the variable diameter deep hole workpiece.

Description

Technical Field

[0001] The invention discloses an electric inner diameter measuring tool, in particular to a variable diameter deep hole inner diameter measuring tool, belonging to the technical field of deep hole detection tools. Background Art

[0002] At present, the traditional method of measuring the inner diameter of a hole mainly uses measuring tools such as calipers and callipers. This type of measurement method is inconvenient to operate, has low measurement efficiency, and is difficult to ensure accuracy. Existing deep hole or ultra-deep hole inner diameter measuring tools are mainly suitable for applications where deep holes with equal diameters are detected. As large and ultra-large parts are widely used in modern aircraft, ships, large precision instruments and other products, the demand for efficient special measuring tools for variable diameter deep holes or ultra-deep holes is becoming more and more urgent. Summary of the invention

[0003] The technical problem to be solved by the present invention is that the existing deep hole measuring tools mentioned in the background technology have the problems of inconvenient positioning and assembly, and low efficiency in measuring the inner diameter of variable diameter deep holes.

[0004] To solve the above problems, the technical solution adopted by the present invention is:

[0005] A variable diameter deep hole inner diameter measuring tool, comprising a positioning connection module for connecting a workpiece to be measured, a measuring display module that can be placed in the deep hole of the workpiece to be measured, and a motion transmission module for carrying the measuring display module, wherein the motion transmission module is interconnected with the positioning connection module and the measuring display module respectively;

[0006] The positioning connection module comprises a T-shaped hollow shaft, a positioning cone, a supporting flat plate, a fixed plate, a T-shaped rotating plate, a Z-shaped claw and a digital display; the positioning cone is sleeved on one end of the T-shaped hollow shaft, the small end face of the positioning cone is provided with two evenly distributed threaded through holes, the center of the small end face of the positioning cone is provided with a guide hole, the guide hole is sleeved on the T-shaped hollow shaft, the supporting flat plate is fixedly connected to the other end of the T-shaped hollow shaft, and the supporting flat plate is fixedly connected to the fixed plate through a connecting rod;

[0007] The fixed disk 1 is sleeved on the outer circle of the thin end of the T-shaped hollow shaft 1 through the center through hole 2, and a radial T-shaped slide groove 1 is opened on the end surface of the fixed disk 1 close to the positioning cone, and a radial slider 1 is installed in the T-shaped slide groove 1, and a support shaft 1 is fixedly connected to the radial slider 1. The T-shaped turntable 1 is provided with a through hole opened in the center, and a waist-shaped groove 1 is opened on the thick end disk surface of the T-shaped rotating disk, and the two ends of the waist-shaped groove 1 are distributed on two circles of different diameters. The thin end of the T-shaped turntable 1 passes through the center through hole 2 and is connected to the output end of the hollow motor; the hollow motor is sleeved on the outer circle of the thin end of the T-shaped hollow shaft 1; the other end of the support shaft 1 passes through a bearing 1 located in the waist-shaped groove 1, and is connected to the power input end of the Z-shaped claw, and the clamping direction of the Z-shaped claw is along the radius direction of the fixed disk 1;

[0008] The measuring display module comprises a cup-shaped cylinder, a second fixed disk, a second T-shaped rotating disk, a motor, a beveled disk, a magnetic scale, a probe seat, a digital display and a probe; a protective cover is provided at the opening of the cup-shaped cylinder, and a central hole for lead-in is provided at the bottom of the cup-shaped cylinder; the second fixed disk is fixedly connected to the inner wall of the cup-shaped cylinder near the opening, and the second fixed disk is provided with radial T-shaped slide grooves distributed along the circumferential direction, and a through hole three is also provided in the center of the second fixed disk; the thin end of the second T-shaped rotating disk passes through the through hole three to connect with the first motor, and the end surface of the thick end of the second T-shaped rotating disk is provided with waist-shaped grooves two in the circumferential direction; the first motor and the encoder are connected to the inner wall of the cup-shaped cylinder through the first fixed bracket; the beveled disk is mounted on the outer circle of the thin end of the second T-shaped rotating disk, and is located between the second fixed disk and the first fixed bracket; the probe of the magnetic scale is tangent to the end surface of the beveled disk near the first fixed bracket, and is fixed to the second fixed disk through the second fixed bracket;

[0009] A radial slider is arranged in the second T-shaped slide groove, one end of the second support shaft is fixedly connected to the second radial slider, the other end of the second support shaft passes through the second bearing arranged in the second waist-shaped groove, and is connected to the probe seat, the probe seat is threadedly connected to the probe, the probe is arranged along the radial direction of the second T-shaped turntable, a pressure sensor is arranged between the probe and the probe seat, and the height of the probe from the center of the second T-shaped turntable is greater than the radius of the second T-shaped turntable, and the probe extends out of the through hole opened on the cup-shaped cylinder;

[0010] The motion transmission module comprises a T-shaped hollow shaft 2, a sleeve shaft, a supporting flat plate 2, a feed screw, a motor 2, a motor 3, a driving gear and a driven gear; the large end of the T-shaped hollow shaft 2 is fixedly connected to the bottom of the cup-shaped sleeve; the positioning cone is sleeved on the T-shaped hollow shaft 2, and the small end face of the positioning cone does not contact the large end of the T-shaped hollow shaft 2; the sleeve shaft is sleeved on the T-shaped hollow shaft 2 through rolling bearings at both ends, and one end of the sleeve shaft is sleeved in the guide hole of the positioning cone; the supporting flat plate 2 is fixedly connected to the other end of the sleeve shaft; one end of the feed screw passes through the threaded through hole, and the other end can rotate through the supporting Flat plate 2 is connected to motor 2; the motor 2 is installed on the end face of the supporting flat plate 2 which is different from the feed screw, the motor 3 is installed on the end face of the supporting flat plate 2 on the same side as the feed screw, and the output shaft of motor 3 can rotate through the supporting flat plate 2 and be connected to the driving gear; the driving gear is meshed with the driven gear installed at the other end of the T-shaped hollow shaft 2; the digital display is installed on the supporting flat plate 2 through the table frame, and is connected to the magnetic scale with a signal line; the digital display, hollow motor, motor 1, motor 2 and motor 3 are all connected to the control module and the power module; the control module and the power module are installed on the fixed bracket 1.

[0011] The width and depth of the waist-shaped groove 1 described in the present invention are respectively equal to the diameter and height of the bearing 1.

[0012] The connection between the probe seat and the probe of the present invention is along the radial direction of the second T-shaped rotating disk, and the height of the probe from the center of the second T-shaped rotating disk is greater than the radius of the second T-shaped rotating disk.

[0013] A bearing three is arranged between the fixed disk two and the thin end of the T-shaped rotating disk two of the present invention.

[0014] The number of the feed screws described in the present invention is two, and the number of the T-shaped slide groove one, the waist-shaped groove one, the waist-shaped groove two, and the T-shaped slide groove two are all three.

[0015] The inclination size of the right end surface of the beveled circular disk described in the present invention is designed according to the detection accuracy of the inner diameter of the deep hole.

[0016] The beneficial effects of the present invention are:

[0017] 1. This electric inner diameter measuring tool for variable diameter deep hole detection adopts an electric positioning connection module, a measurement display module, and a motion transmission module, which can quickly realize the positioning and clamping of the measuring tool and the workpiece to be measured, and improve the measurement efficiency of the inner diameter of the deep hole.

[0018] 2. This electric inner diameter measuring tool used for variable diameter deep hole detection adopts a beveled disc and a high-precision magnetic scale to convert the deep hole radial detection quantity into an axial detection quantity, which is conducive to reducing the radial size of the electric inner diameter measuring tool and also ensures the detection accuracy of the hole diameter.

[0019] 3. This electric inner diameter measuring tool used for variable diameter deep hole detection uses a pressure sensor to sense the contact force between the probe and the hole wall to control the rotation of the motor, effectively ensuring the motion sensitivity of the probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the positioning connection module of the present invention;

[0022] Figure 3 It is a structural schematic diagram of a T-shaped turntable of the present invention;

[0023] Figure 4 It is a structural schematic diagram of a fixed disk of the present invention;

[0024] Figure 5 It is a schematic diagram of the installation structure of the Z-shaped clamping claw and the radial slider of the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the measurement display module of the present invention;

[0026] Figure 7 To measure the cross-sectional structure of the display module;

[0027] Figure 8 It is a structural schematic diagram of the T-type turntable 2 of the present invention;

[0028] Fig. 9 It is a structural schematic diagram of the second fixed disk of the present invention;

[0029] Fig.10 It is a schematic diagram of the structure of the motion transfer module of the present invention;

[0030] Fig.11 It is a schematic diagram of the structure of an implementation case of the present invention when used for measurement. DETAILED DESCRIPTION

[0031] In order to make the content of the present invention more obvious and understandable, the specific implementation manner is further described below in conjunction with the accompanying drawings.

[0032] The left end, rear end and other directions described in this embodiment are only located on the left and right sides of the structure shown in the accompanying drawings when the reader is facing the accompanying drawings, which is convenient for describing the position connection relationship in detail according to the view, and does not limit the usage of the structure of the present invention and the structure of the present invention itself.

[0033] like Figure 1 , 11 As shown, a variable diameter deep hole inner diameter measuring tool includes a positioning connection module 100 for connecting to a workpiece 2 to be measured, a measuring display module 200 that can be placed in the deep hole of the workpiece 2 to be measured, and a motion transfer module 300 for carrying the measuring display module 200; wherein the motion transfer module 300 is interconnected with the positioning connection module 100 and the measuring display module 200, respectively.

[0034] like Figure 2 As shown, the positioning and connecting module 100 includes a T-shaped hollow shaft 101, a positioning cone 102, a supporting flat plate 103, a fixed plate 104, a T-shaped turntable 105 and a Z-shaped claw 106; two evenly distributed threaded through holes 102-1 are provided on the small end face of the positioning cone 102, and a guide hole 102-2 is opened in the center of the small end face of the positioning cone, and the guide hole is sleeved on the outer circle of the thin end of the T-shaped hollow shaft 101, and is fixedly connected to the supporting flat plate 103 at the right end of the T-shaped hollow shaft 101, and its left end face is connected to the fixed plate 104 by four evenly distributed connecting rods 107.

[0035] like Figure 4 As shown, the fixed plate 104 is mounted on the outer circle of the thin end of the T-shaped hollow shaft 101 through the central through hole 104-1. The left end surface of the fixed plate 1 is evenly distributed with radial T-shaped grooves 104-2. A radial slider 108 is installed in the radial T-shaped groove. A support shaft 109 is fixed to the radial slider 108. The support shaft 109 passes through a bearing 110 located in a waist-shaped groove 105-2 and is connected to the power input end of the Z-shaped claw 106. The clamping direction of the Z-shaped claw is along the radius direction of the fixed plate 104. Figure 5 shown.

[0036] like Figure 3 As shown, the T-shaped turntable 105 is provided with a central through hole 105-1, and a waist-shaped groove 105-2 is provided on the thick end disk surface of the T-shaped turntable 1, and the two ends of the waist-shaped groove 105-2 are distributed on two circles with different diameters, and the width and depth of the waist-shaped groove 105-2 are respectively equal to the diameter and height of the bearing 110, and the thin end of the T-shaped turntable 105 passes through the central through hole 2 104-1 and is connected to the output end of the hollow motor 111; the hollow motor 111 is mounted on the outer circle of the thin end of the T-shaped hollow shaft.

[0037] like Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, the measurement display module 200 includes a cup-shaped cylinder 201, a fixed disk 203, a T-shaped turntable 204, a motor 207, a beveled disc 212, a magnetic scale 210, a probe base 213, a probe 214 and a digital display 218; the cup-shaped cylinder 201 opens to the left, and a protective cover 202 is installed at the opening. The bottom of the cup-shaped cylinder 201 is provided with a central hole for lead wire; the fixed disk 203 fixedly connected to the inner wall of the left end of the cup-shaped cylinder 201 is distributed with three radial T-shaped grooves 203-2 along the circumferential direction, and a through hole 3 203-1 is also opened in the center; a T-shaped groove 203-2 passes through the through hole 3 203-1 and the bearing 3 205 from left to right The right end of the turntable 204 is connected to the output shaft of the motor 1 207, and three waist-shaped grooves 204-1 are evenly distributed on the thick end surface of the T-shaped turntable 204; the motor 1 207 and the encoder 208 are connected to the inner wall of the cup-shaped cylinder 201 through the fixed bracket 1 209; the beveled disc 212 mounted on the outer circle of the thin end of the T-shaped turntable 204 is located between the fixed disc 203 and the fixed bracket 1 209, and the inclination angle of its right end surface is designed according to the detection accuracy of the inner diameter of the deep hole; the probe of the magnetic scale 210 is tangent to the right end surface of the beveled disc 212, and the magnetic scale is fixed to the right end surface of the fixed disc 203 through the fixed bracket 211.

[0038] A radial slider 215 is arranged in the T-shaped slide groove 203-2, and one end of the radial slider 2 is fixedly connected to the support shaft 216. The other end of the support shaft 216 passes through a bearing 217 arranged in the waist-shaped groove 204-1, and is connected to the probe seat 213. The probe 214 is connected to the probe seat 213 by a thread. The probe is arranged along the radial direction of the T-shaped turntable 2. A pressure sensor is installed between the probe and the probe seat, and the height of the probe from the center of the T-shaped turntable 2 is greater than the radius of the T-shaped turntable 2. The probe extends out of the through hole opened on the cup-shaped cylinder.

[0039] like Figure 1 , 10As shown, the motion transmission module 300 includes a T-shaped hollow shaft 2 301, a sleeve shaft 302, a support flat plate 2 303, a feed screw 304, a motor 2 305, a motor 306, a driving gear 307 and a driven gear 308; the large end of the T-shaped hollow shaft 2 301 is fixedly connected to the right end face of the cup-shaped sleeve 201, and the rolling bearings at both ends are inserted into the inner hole of the sleeve shaft 302, and the right end of the sleeve shaft 302 is fixedly connected to the support flat plate 2 303; two feed screws evenly distributed on the end face of the support flat plate 2 303 The right end of the feed screw 304 is connected to the motor 2 305, and the left end of the feed screw can be rotated to pass through the supporting flat plate 2 303 and inserted into the threaded through hole 102-1; the motor 2 305 is installed on the right end surface of the supporting flat plate 2 303; the motor 306 is installed on the left end surface of the supporting flat plate 2 303, and the output shaft of the motor 3 (306) can be rotated to pass through the supporting flat plate 2 303 and connected to the driving gear 307, and the driving gear 307 is meshed with the driven gear 308 installed on the right end of the T-shaped hollow shaft 2 301.

[0040] In addition, the digital display 218 is installed on the supporting flat plate 2 303 through the meter frame 219, and is connected to the magnetic scale 210 by a signal line; the digital display 218, the hollow motor 111, the motor 1 207, the motor 2 305 and the motor 3 306 are all connected to the control module 220 and the power module 221; the control module 220 and the power module 221 are installed on the fixed bracket 1 209.

[0041] A variable diameter deep hole inner diameter measuring tool works as follows:

[0042] 1) Before measurement, first select a suitable probe 214 according to the inner diameter of the variable-diameter deep hole of the workpiece to be measured, connect it to the probe base 213 through the pressure sensor thread, and complete the calibration of the electric inner diameter measuring tool. The specific implementation steps are as follows:

[0043] a) Control motor 1 208 to drive T-shaped turntable 204 to rotate around fixed disk 203. Under the joint constraints of T-shaped slide groove 203-2 and waist groove 204-1, the probe 214 and probe seat 213 are driven to move to the innermost side along the radial direction of fixed disk 203 through radial slider 215, support shaft 216 and bearing 217. The minimum aperture value Φ corresponding to the three probes 214 is measured with the help of auxiliary measuring tools and pressure sensors. min , and the digital display shows the measured value L1 of the magnetic ruler 210 at this time;

[0044] b) Control motor 1 208 to drive T-shaped turntable 204 to rotate around fixed disk 203. Under the joint constraints of T-shaped slide groove 203-2 and waist-shaped groove 204-1, the probe 214 and probe seat 213 are driven to move to the outermost side along the radial direction of fixed disk 203 through radial slider 215, support shaft 216 and bearing 217. The maximum aperture value Φ corresponding to the three probes 214 is measured with the help of auxiliary measuring tools and pressure sensors. max , and the digital display shows the measured value L2 of the magnetic ruler 210 at this time;

[0045] c) Control the motor 1 208, through the fixed plate 203, the T-shaped turntable 204, the radial slider 215 and the support shaft 216, so that the bearing 217 is located at a certain middle position of the waist-shaped groove 204-1. At this time, the diameter measured by the probe 214 can be displayed on the digital display as the instantaneous measurement value L of the magnetic scale 210, as well as the above-mentioned Φ min , Φ max , L1, L2 calculation.

[0046] 2) When measuring, if Fig.11 As shown, the positioning connection module 100 supports the measurement display module 200 and the motion transmission module 300, the motion transmission module 300 carries the measurement display module 200 to the position to be measured of the deep hole of the workpiece 2 to be measured, and the measurement display module 200 completes the measurement and display of the inner diameter of the deep hole position to be measured. The specific implementation steps are as follows:

[0047] a) placing the positioning connection module 100 on the end surface of the deep hole of the workpiece 2 to be measured, starting the hollow motor 111, and driving the three Z-shaped claws 106 to clamp the outer surface of the workpiece 2 to be measured through the fixed plate 104, the T-shaped rotating plate 105, the radial slider 108, the support shaft 109 and the support shaft 109;

[0048] b) Under the support of the positioning connection module 100, the second motor 305 is started, and the measuring and displaying module 200 is driven to run to the position to be measured of the inner diameter of the deep hole of the workpiece 2 to be measured through the feed screw 304;

[0049] c) According to the measured value of the pressure sensor, if the measured value is equal to the set value, the motor 1 208 remains stationary; if the measured value is less than the set value, the motor 1 208 is started to rotate forward, otherwise the motor 1 208 is reversed; the probe 214 is driven to move to the corresponding position through the fixed disk 203, the T-type turntable 204, the radial slider 215 and the support shaft 216, and the instantaneous measured value L of the magnetic scale 210 displayed on the digital display is recorded, combined with the above Φ min , Φ max , L1, L2, the inner hole diameter size of the measuring position can be calculated.

[0050] d) If it is necessary to measure the inner diameter of the hole at different positions on the same section, start the motor three 306, and drive the measurement display module 200 to rotate to the corresponding measurement position in the current section through the driving gear 307, the driven gear 308 and the T-shaped hollow shaft two 301, and then complete the aperture measurement work according to step c).

[0051] The above is only a preferred implementation example of the electric inner diameter measuring tool for variable diameter deep hole detection according to the present invention, but the implementation scope of the present invention is not limited to this example.

Claims

1. A variable diameter deep hole inner diameter measuring tool, characterized in that: It comprises a positioning connection module (100) for connecting to a workpiece to be measured (2), a measurement display module (200) which can be placed in a deep hole of the workpiece to be measured (2), and a motion transmission module (300) for carrying the measurement display module (200), wherein the motion transmission module (300) is interconnected with the positioning connection module (100) and the measurement display module (200) respectively; The positioning connection module (100) comprises a T-shaped hollow shaft (101), a positioning cone (102), a supporting flat plate (103), a fixing plate (104), a T-shaped rotating plate (105), a digital display (218) and a Z-shaped claw (106); the positioning cone (102) is sleeved on one end of the T-shaped hollow shaft (101); two evenly distributed threaded through holes (102-1) are provided on the small end surface of the positioning cone (102); a guide hole (102-2) is provided at the center of the small end surface of the positioning cone (102); the guide hole (102-2) is sleeved on the T-shaped hollow shaft (101); the supporting flat plate (103) is fixedly connected to the other end of the T-shaped hollow shaft (101); the supporting flat plate (105) is provided with a plurality of threaded through holes (102-1) arranged on the small end surface of the positioning cone (102); 03) is fixedly connected to a fixed disk (104) through a connecting rod (107); the fixed disk (104) is mounted on the outer circle of the thin end of a T-shaped hollow shaft (101) through a central through hole (104-1); a T-shaped slide groove (104-2) is radially opened on the end surface of the fixed disk (104) close to the positioning cone; a radial slider (108) is installed in the T-shaped slide groove (104-2); a support shaft (109) is fixedly connected to the radial slider (108); a through hole (105-1) is provided in the center of the T-shaped rotating disk (105); a waist-shaped groove (105-2) is opened on the thick end disk surface of the T-shaped rotating disk (105); the two ends of the waist-shaped groove (105-2) are distributed on two circles of different diameters; The thin end of the T-shaped turntable (105) passes through the center through hole (104-1) and is connected to the output end of the hollow motor (111); the hollow motor (111) is mounted on the outer circle of the thin end of the T-shaped hollow shaft (101); the other end of the support shaft (109) passes through the bearing (110) located in the waist-shaped groove (105-2) and is connected to the power input end of the Z-shaped claw (106); the clamping direction of the Z-shaped claw (106) is along the radial direction of the fixed disk (104); The measuring display module (200) comprises a cup-shaped cylinder (201), a second fixed disk (203), a second T-shaped rotating disk (204), a first motor (207), a beveled circular disk (212), a magnetic ruler (210), a probe base (213), a probe (214) and a digital display (218); a protective cover (202) is provided at the opening of the cup-shaped cylinder (201), and a central hole for lead wire is provided at the bottom of the cup-shaped cylinder (201); the second fixed disk (203) is fixedly connected to the inner wall of the cup-shaped cylinder (201) near the opening, and a radial T-shaped sliding groove (203-2) is provided on the circumference of the second fixed disk (203), and a through hole (203-1) is provided at the center of the second fixed disk (203); the T The thin end of the T-shaped turntable (204) passes through the through hole (203-1) to connect to the motor (207), and a waist-shaped groove (204-1) is provided on the thick end surface of the T-shaped turntable (204); the motor (207) and the encoder (208) are connected to the inner wall of the cup-shaped cylinder (201) via the fixed bracket (209); the beveled disc (212) is sleeved on the outer circle of the thin end of the T-shaped turntable (204) and is located between the fixed disc (203) and the fixed bracket (209); the probe of the magnetic scale (210) is tangent to an end surface of the beveled disc (212) close to the fixed bracket (209), and the magnetic scale (210) is fixed to the fixed disc (203) via the fixed bracket (211); A radial slider (215) is arranged in the second T-shaped slide groove (203-2), one end of the second support shaft (216) is fixedly connected to the second radial slider (215), the other end of the second support shaft (216) passes through the second bearing (217) arranged in the second waist-shaped groove (204-1), and is connected to the probe seat (213), the probe seat (213) is connected with the probe (214) by a thread, the probe (214) is arranged along the radial direction of the second T-shaped turntable (204), a pressure sensor is arranged between the probe (214) and the probe seat (213), and the height of the probe (214) from the center of the second T-shaped turntable (204) is greater than the radius of the second T-shaped turntable (204), and the probe (214) extends out of the through hole opened on the cup-shaped cylinder (201); The motion transmission module (300) comprises a second T-shaped hollow shaft (301), a sleeve shaft (302), a second support flat plate (303), a feed screw (304), a second motor (305), a third motor (306), a driving gear (307) and a driven gear (308); the large end of the second T-shaped hollow shaft (301) is fixedly connected to the bottom of the cup-shaped cylinder (201), the positioning cone (102) is sleeved on the second T-shaped hollow shaft (301), and the small end of the positioning cone (102) is fixedly connected to the bottom of the cup-shaped cylinder (201). The surface of the sleeve shaft (302) does not contact the large end of the T-shaped hollow shaft (301); the sleeve shaft (302) is sleeved on the T-shaped hollow shaft (301) through rolling bearings at both ends, one end of the sleeve shaft (302) is sleeved in the guide hole (102-2) of the positioning cone (102), and the supporting flat plate (303) is fixed to the other end of the sleeve shaft (302); one end of the feed screw (304) passes through the threaded through hole (102-1), and the other end of the feed screw (304) can rotate through the supporting flat plate (102-2). The motor 2 (305) is connected to the motor 2 (303); the motor 2 (305) is installed on the end face of the support plate 2 (303) which is different from the feed screw (304); the motor 3 (306) is installed on the end face of the support plate 2 (303) and the feed screw (304) on the same side, and the output shaft of the motor 3 (306) can rotate through the support plate 2 (303) and be connected to the driving gear (307); the driving gear (307) is connected to the other end of the T-shaped hollow shaft 2 (301) installed The digital display (218) is mounted on the second supporting plate (303) via a meter frame (219) and is connected to the magnetic scale (210) via a signal line; the digital display (218), the hollow motor (111), the motor one (207), the motor two (305) and the motor three (306) are all connected to the control module (220) and the power module (221); the control module (220) and the power module (221) are mounted on the fixing bracket one (209); The width and depth of the waist-shaped groove 1 (105-2) are respectively equal to the diameter and height of the bearing 1 (110); The number of feed screw rods (304) is two; A bearing 3 (205) is installed between the thin end of the second fixed disk (203) and the second T-shaped rotating disk (204).

2. The variable diameter deep hole inner diameter measuring tool according to claim 1, characterized in that: The number of the T-shaped slide groove 1 (104-2), the waist-shaped groove 1 (105-2), the waist-shaped groove 2 (204-1), and the T-shaped slide groove 2 (203-2) are all three.

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