A tool for detecting the inner diameter, roundness and straightness of a cylinder

Abstract

This invention belongs to the field of laser measurement technology and discloses a tool for detecting the internal diameter, roundness, and straightness of a cylinder. It includes an equidistant detection arm assembly, with an axis correction arm assembly surrounding the equidistant detection arm assembly and supporting it on the cylinder's internal axis. Three sets of detection disk assemblies are located at one end of the equidistant detection arm assembly. The correction disks of this invention drive multiple support arms to perform synchronous outward extension movements via the auxiliary arm. Multiple traveling wheels at the top of the support arms abut against the inner wall of the cylinder, forming an axis correction structure. In this way, when the equidistant detection arm assembly is in use, its axis coincides with the cylinder's axis, facilitating the acquisition of detection data during subsequent detection of the cylinder's internal diameter, roundness, and straightness. The detection disk assembly of this invention is equipped with a self-rotation protection module, which enables the laser rangefinder to spin into the brush arm for self-rotation cleaning and protection.

Description

Technical Field

[0001] This invention belongs to the field of laser measurement technology, specifically relating to a tool for detecting the internal diameter, roundness, and straightness of a cylinder. Background Technology

[0002] When inspecting the internal diameter, roundness, and straightness of a cylinder, the diameter is a crucial parameter. To ensure the accuracy of the subsequent calculations of the internal diameter, roundness, and straightness by the data processor, it is necessary to collect diameter data from multiple cross-sections at multiple inspection points. During diameter inspection data collection, equidistant inspection data must be collected between multiple inspection points, i.e., equidistant inspection. The data collected by equidistant inspection also facilitates subsequent analysis of diameter consistency or taper using existing data processors.

[0003] The existing technology has the following problems: In the equidistant multi-section diameter data acquisition when detecting the internal diameter, roundness and straightness of the cylinder, it is necessary to ensure that the multi-section detection position is on the cylinder axis in addition to ensuring the equidistant multi-section detection data acquisition. This is to ensure the effectiveness of the detection data acquisition and facilitate subsequent data processing analysis and measurement. Currently, the cylinders encountered are divided into cylinders with constant diameter and cylinders with variable diameter. When encountering the above different types of cylinders, there is a lack of a highly applicable detection data acquisition tool, which will reduce the detection efficiency of the cylinder. Summary of the Invention

[0004] To address the problems mentioned in the background section, this invention provides a tool for detecting the internal diameter, roundness, and straightness of a cylinder, which has strong applicability.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a tool for detecting the internal diameter, roundness, and straightness of a cylinder, comprising an equidistant detection arm assembly, an axis correction arm assembly for assisting the equidistant detection arm assembly in its axial alignment within the cylinder, and three sets of detection disc assemblies at one end of the equidistant detection arm assembly. An equidistant drive module is provided within the equidistant detection arm assembly, enabling the three sets of detection disc assemblies to perform equidistant detection on the inner wall of the cylinder. A flexible push module is provided between the equidistant detection arm assembly and the axis correction arm assembly, allowing the axis correction arm assembly to drive the equidistant detection arm assembly for self-adjusting detection within the variable-diameter cylinder.

[0006] In a preferred embodiment of a tool for detecting the internal diameter, roundness, and straightness of a cylinder, the equidistant detection arm assembly includes a fixed arm, a first-stage arm slidably disposed inside the fixed arm, a second-stage arm slidably disposed inside the first-stage arm, and a third-stage arm slidably disposed inside the second-stage arm. One end of the fixed arm is provided with a first hydraulic cylinder and an end cover, and the other end of the fixed arm is provided with a first push rod arm, an end lug, and a second hydraulic cylinder. A push spring is disposed inside the end cover.

[0007] The flexible jacking module includes a second hydraulic cylinder, an end cover, and a jacking spring. The end cover is fixedly installed at the end of the fixed arm away from the first jacking arm, the jacking spring is fixedly installed inside the end cover, and the second hydraulic cylinder is fixedly installed on the outer wall of the fixed arm.

[0008] In a preferred embodiment of a tool for detecting the internal diameter, roundness, and straightness of a cylinder, the equidistant drive module includes a fourth toothed plate, a third toothed plate, a second traveling gear, a first traveling gear, a first toothed plate, and a second toothed plate. The fourth toothed plate is fixedly disposed in a transverse groove opened in the inner wall of the fixed arm, the third toothed plate is fixedly disposed in a transverse groove opened in the inner wall of the first-stage arm, the second traveling gear is rotatably disposed on the body of the first-stage arm, the first traveling gear is rotatably disposed on the body of the second-stage arm, the first toothed plate is fixedly disposed in a transverse groove opened in the outer wall of the second-stage arm, and the second toothed plate is fixedly disposed in a transverse groove opened in the inner wall of the third-stage arm.

[0009] In a preferred embodiment of a tool for detecting the internal diameter, roundness, and straightness of a cylinder, the axis correction arm assembly includes a correction disc, a plurality of support arms are arranged around the correction disc, an auxiliary arm is hinged between the support arms and the correction disc, a traveling wheel is rotatably provided at one end of the support arm, and a drive motor is provided on the outer side of one end of the support arm.

[0010] In a preferred embodiment of a tool for detecting the internal diameter, roundness, and straightness of a cylinder, the detection disk assembly includes a back disk, a disk shaft fixedly disposed on the inner side of the back disk, and multiple brush arms fixedly disposed on the edge of the back disk. A slip ring is slidably sleeved on the disk shaft, and multiple laser rangefinders are fixedly disposed on the slip ring via support arms. The detection disk assembly is provided with a self-rotation protection module. Through the self-rotation protection module, when two adjacent sets of the detection disk assemblies come into contact with each other, the laser rangefinders spin into the brush arms to perform self-rotation cleaning and self-rotation protection.

[0011] In a preferred embodiment of a tool for detecting the internal diameter, roundness, and straightness of a cylinder, the self-rotating protection module includes a guide rail groove, a guide rail column, a clamping spring, and a second push rod arm. The guide rail column is fixedly mounted on the inner wall of the slip ring, the guide rail groove is formed on the outer wall of the disc shaft, the clamping spring is sleeved on the disc shaft, and the second push rod arm is fixed on the outer wall of the back disc.

[0012] In a preferred embodiment of a tool for detecting the internal diameter, roundness, and straightness of a cylinder, three sets of detection disc assemblies are respectively fixed to the ends of a primary arm, a secondary arm, and a tertiary arm. When the primary arm slides inside the fixed arm, the top of the second traveling gear meshes with the fourth toothed plate. When the secondary arm slides inside the primary arm, the bottom of the second traveling gear meshes with the first toothed plate, and the bottom of the first traveling gear meshes with the third toothed plate. When the tertiary arm slides inside the secondary arm, the top of the first traveling gear meshes with the second toothed plate. The output end of the first hydraulic cylinder is fixedly connected to the rear end of the primary arm.

[0013] In a preferred embodiment of a tool for detecting the internal diameter, roundness, and straightness of a cylinder, the calibration disc is sleeved outside the fixed arm and is located between the push spring and the fixed arm. The push spring abuts against one side of the calibration disc, and the extension rod of the second hydraulic cylinder abuts against the other side of the calibration disc. The end of the support arm away from the traveling wheel is rotatably mounted on the end lug.

[0014] In a preferred embodiment of a tool for detecting the internal diameter, roundness, and straightness of a cylinder, the guide rail slide is inserted into the guide rail groove, and the two ends of the clamping spring abut against the back plate and the slip ring, respectively.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The calibration disc of the present invention drives multiple support arms to perform synchronous outward movement through the auxiliary arm. Multiple traveling wheels at the top of the multiple support arms abut against the inner wall of the cylinder and form an axis correction structure. In this way, when the equidistant detection arm assembly is used, the axis of the equidistant detection arm assembly coincides with the axis of the cylinder, thereby facilitating the subsequent acquisition of detection data when detecting the inner diameter, roundness and straightness of the cylinder.

[0017] 2. The present invention uses a flexible jacking module to enable the axis correction arm assembly to drive the equidistant detection arm assembly to perform self-adjusting detection within the variable diameter cylinder, thereby achieving self-adjustment of the axis correction arm assembly. In this way, the present invention can meet the detection needs of cylinders with different diameters or variable diameters.

[0018] 3. The equidistant detection arm assembly of the present invention is provided with three sets of detection disk assemblies at one end. By setting the detection structure, on the one hand, it is necessary to ensure the sufficiency and reliability of the detection data source, and on the other hand, it is also convenient to analyze the diameter consistency or taper. The equidistant detection arm assembly of the present invention is provided with an equidistant driving module. Through the equidistant driving module, the three sets of detection disk assemblies can perform equidistant detection on the inner wall of the cylinder.

[0019] 4. The detection disk assembly of the present invention is provided with a self-rotating protection module. When two adjacent sets of detection disk assemblies come into contact with each other, the laser rangefinder rotates into the brush arm for self-rotating cleaning and self-rotating protection. On the one hand, it realizes the self-rotating cleaning of the top of the laser rangefinder, and on the other hand, it realizes the storage of the laser rangefinder in the brush arm. Thus, the brush arm protects the laser rangefinder and avoids the precision detection instrument from being bumped and damaged or the detection end from being contaminated by dust when it is not in use. Attached Figure Description

[0020] Figure 1 This is a perspective view of the tool of the present invention used for detecting the internal diameter, roundness, and straightness of a cylinder:

[0021] Figure 2 This is an exploded view of the tool of the present invention for detecting the internal diameter, roundness and straightness of a cylinder;

[0022] Figure 3 This is a perspective view of the equidistant detection arm assembly of the present invention;

[0023] Figure 4 This is a cross-sectional view of the equidistant detection arm assembly of the present invention:

[0024] Figure 5 This is a perspective view of the axis correction arm assembly of the present invention:

[0025] Figure 6 This is a perspective view of the detection disk assembly of the present invention:

[0026] Figure 7 This is an exploded view of the detection disk assembly of the present invention.

[0027] Reference numerals: 100, equidistant detection arm assembly; 101, fixed arm; 102, push spring; 103, end cover; 104, first hydraulic cylinder; 105, first traveling gear; 106, second-stage arm; 107, first toothed plate; 108, third-stage arm; 109, second toothed plate; 110, second traveling gear; 111, first-stage arm; 112, third toothed plate; 113, first push rod arm; 114, fourth toothed plate; 115, end lug; 11 6. Second hydraulic cylinder; 200. Axis alignment arm assembly; 201. Alignment disc; 202. Auxiliary arm; 203. Support arm; 204. Drive motor; 205. Traveling wheel; 300. Detection disc assembly; 301. Back plate; 302. Disc shaft; 303. Tightening spring; 304. Guide rail groove; 305. Brush arm; 306. Laser rangefinder; 307. Support arm; 308. Slip ring; 309. Guide rail slide column; 310. Second push rod arm. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1-7 As shown, the present invention provides a tool for detecting the internal diameter, roundness, and straightness of a cylinder, including an equidistant detection arm assembly 100. An axis correction arm assembly 200 is provided around the equidistant detection arm assembly 100 to assist in its axial mounting within the cylinder. Three sets of detection disc assemblies 300 are provided at one end of the equidistant detection arm assembly 100. An equidistant drive module is provided inside the equidistant detection arm assembly 100. Through the equidistant drive module, the three sets of detection disc assemblies 300 perform equidistant detection on the inner wall of the cylinder. A flexible pushing module is provided between the equidistant detection arm assembly 100 and the axis correction arm assembly 200. Through the flexible pushing module, the axis correction arm assembly 200 drives the equidistant detection arm assembly 100 to perform self-adjusting detection within the variable-diameter cylinder.

[0030] In a preferred embodiment, please refer to Figure 3 and Figure 4 The equidistant detection arm assembly 100 includes a fixed arm 101, a first-stage arm 111 slidably disposed inside the fixed arm 101, a second-stage arm 106 slidably disposed inside the first-stage arm 111, a third-stage arm 108 slidably disposed inside the second-stage arm 106, a first hydraulic cylinder 104 disposed at one end of the fixed arm 101, and a first push rod arm 113 and an end lug 115 disposed at the other end of the fixed arm 101;

[0031] The flexible jacking module includes a second hydraulic cylinder 116, an end cover 103, and a jacking spring 102. The end cover 103 is fixedly installed at one end of the fixed arm 101 away from the first jacking arm 113. The jacking spring 102 is fixedly installed inside the end cover 103. The second hydraulic cylinder 116 is fixedly installed on the outer wall of the fixed arm 101.

[0032] In a preferred embodiment, please refer to Figure 5 The axis correction arm assembly 200 includes a correction plate 201, a plurality of support arms 203 are arranged around the correction plate 201, an auxiliary arm 202 is hinged between the support arms 203 and the correction plate 201, and a walking wheel 205 driven by a drive motor 204 is rotatably arranged at one end of the support arm 203.

[0033] See Figures 1-5 The calibration disc 201 is sleeved on the outside of the fixed arm 101, and the end of the support arm 203 away from the traveling wheel 205 is rotatably mounted on the end ear 115.

[0034] See Figures 1-5 The calibration plate 201 is located between the push spring 102 and the fixed arm 101. The push spring 102 abuts against one side of the calibration plate 201, and the extension rod of the second hydraulic cylinder 116 abuts against the other side of the calibration plate 201.

[0035] The aforementioned push spring 102 pushes the calibration disc 201, thereby achieving the axial alignment of the axis alignment arm assembly 200 and the equidistant detection arm assembly 100 within the cylinder. In use, the rotating wheels 205 drive the invention to move and detect within the cylinder. When encountering a variable diameter cylinder, the push spring 102 elastically pushes the calibration disc 201, achieving self-adjustment of the axis alignment arm assembly 200. In this way, the invention can meet the detection needs of cylinders with different diameters or variable diameters.

[0036] In a preferred embodiment, please refer to Figure 6 and Figure 7 The detection disk assembly 300 includes a back disk 301, a disk shaft 302 fixedly disposed inside the back disk 301, and multiple brush arms 305 fixedly disposed on the edge of the back disk 301. A slip ring 308 is slidably sleeved on the disk shaft 302, and multiple laser rangefinders 306 are fixedly disposed on the slip ring 308 via support arms 307. The detection disk assembly 300 is provided with a self-rotation protection module. Through the self-rotation protection module, when two adjacent sets of detection disk assemblies 300 come into contact with each other, the laser rangefinders 306 spin into the brush arms 305 to perform self-rotation cleaning and self-rotation protection.

[0037] In a preferred embodiment, please refer to Figure 3 and Figure 4 The equidistant drive module includes a fourth toothed plate 114, a third toothed plate 112, a second traveling gear 110, a first traveling gear 105, a first toothed plate 107, and a second toothed plate 109. The fourth toothed plate 114 is fixedly installed in a transverse groove opened in the inner wall of the fixed arm 101. The third toothed plate 112 is fixedly installed in a transverse groove opened in the inner wall of the first-stage arm 111. The second traveling gear 110 is rotatably installed on the arm body of the first-stage arm 111. The first traveling gear 105 is rotatably installed on the arm body of the second-stage arm 106. The first toothed plate 107 is fixedly installed in a transverse groove opened in the outer wall of the second-stage arm 106. The second toothed plate 109 is fixedly installed in a transverse groove opened in the inner wall of the third-stage arm 108.

[0038] See Figure 3 and Figure 4When the first-stage arm 111 slides inside the fixed arm 101, the top of the second traveling gear 110 meshes with the fourth toothed plate 114. When the second-stage arm 106 slides inside the first-stage arm 111, the bottom of the second traveling gear 110 meshes with the first toothed plate 107, and the bottom of the first traveling gear 105 meshes with the third toothed plate 112. When the third-stage arm 108 slides inside the second-stage arm 106, the top of the first traveling gear 105 meshes with the second toothed plate 109. The output end of the first hydraulic cylinder 104 is fixedly connected to the rear end of the first-stage arm 111.

[0039] The first hydraulic cylinder 104 drives the first-stage arm 111 to extend outward from the fixed arm 101, which is the first-stage extension action;

[0040] At this time, the top of the second traveling gear 110 meshes and moves on the fourth toothed plate 114. At this time, the bottom of the second traveling gear 110 meshes with the first toothed plate 107, driving the second-stage arm 106 to extend synchronously within the first-stage arm 111. This is the second-stage extension action.

[0041] At this time, when the secondary arm 106 extends out of the primary arm 111, the bottom of the first traveling gear 105 meshes and moves on the third toothed plate 112. At this time, the top of the first traveling gear 105 drives the tertiary arm 108 to extend out of the secondary arm 106 synchronously through meshing with the second toothed plate 109. This is the tertiary extension action.

[0042] See Figures 1-4 The three sets of detection disc assemblies 300 are fixed at the ends of the first-stage arm 111, the second-stage arm 106, and the third-stage arm 108, respectively, so that the three sets of detection disc assemblies 300 can extend synchronously and equidistantly inside the cylinder, thereby realizing synchronous and equidistant detection of multiple detection positions when detecting the internal diameter, roundness, and straightness of the cylinder.

[0043] In a preferred embodiment, please refer to Figure 6 and Figure 7 The self-rotating protection module includes a guide rail groove 304, a guide rail slide column 309, a clamping spring 303, and a second push rod arm 310. The guide rail slide column 309 is fixedly installed on the inner wall of the slip ring 308, the guide rail groove 304 is opened on the outer wall of the disc shaft 302, the clamping spring 303 is sleeved on the disc shaft 302, and the second push rod arm 310 is fixed on the outer wall of the back plate 301.

[0044] See Figure 6 and Figure 7 The guide rail slide column 309 is inserted into the guide rail slide groove 304, and the two ends of the clamping spring 303 abut against the back plate 301 and the slip ring 308 respectively.

[0045] When two adjacent detection disk assemblies 300 come into contact with each other, the second push rod arm 310 on the rear detection disk assembly 300 will come into contact with the slip ring 308 on the front detection disk assembly 300 and push the slip ring 308 closer to the back plate 301. During the pushing process, since the guide rail slide column 309 slides within the guide rail groove 304, the slip ring 308 rotates on the disk shaft 302 and comes into contact with the back plate 301. During this process, the laser rangefinder 306 on the slip ring 308 spins into the brush arm 305. Through this contact between two adjacent detection disk assemblies 300, the laser rangefinder 306 moves into the brush arm 305 and spins.

[0046] The working principle of this invention is as follows: When this invention is used, the second hydraulic cylinder 116 is in a non-extended state. At this time, the push spring 102 pushes the correction disc 201 to slide outside the fixed arm 101. At this time, the correction disc 201 drives multiple support arms 203 to perform synchronous outward extension through the auxiliary arm 202. Multiple traveling wheels 205 on the top of the multiple support arms 203 abut against the inner wall of the cylinder and form an axis correction structure. In this way, when the equidistant detection arm assembly 100 is used, the axis of the equidistant detection arm assembly 100 coincides with the axis of the cylinder, thereby facilitating the subsequent acquisition of diameter detection data when detecting the inner diameter, roundness and straightness of the cylinder.

[0047] Based on the above, a flexible pushing module is provided between the equidistant detection arm assembly 100 and the axis correction arm assembly 200. Through the flexible pushing module, the axis correction arm assembly 200 drives the equidistant detection arm assembly 100 to perform self-adjusting detection within the variable diameter cylinder. The specific working principle is as follows: the axis correction arm assembly 200 drives the equidistant detection arm assembly 100 to perform axial alignment within the cylinder by pushing the correction disc 201 through the pushing spring 102. During use, the invention moves and performs detection within the cylinder by rotating the traveling wheels 205. When encountering a variable diameter cylinder, the axis correction arm assembly 200 is self-adjusted by the elastic pushing of the correction disc 201 through the pushing spring 102. In this way, the invention can meet the detection needs of cylinders with different diameters or variable diameters.

[0048] Based on the above, the equidistant detection arm assembly 100 of the present invention is provided with three sets of detection disk assemblies 300 at one end. By setting up a multi-position detection structure, on the one hand, it is necessary to ensure the sufficiency and reliability of the detection data source, and on the other hand, it is also convenient for subsequent analysis of diameter consistency or taper. Therefore, it is essential to ensure equidistant detection between multiple sets of detection disk assemblies 300. The equidistant detection arm assembly 100 of the present invention is provided with an equidistant drive module. Through the equidistant drive module, the three sets of detection disk assemblies 300 realize equidistant detection of the inner wall of the cylinder. The specific working principle of equidistant detection is as follows: the first hydraulic cylinder 104 drives the first stage arm 111 to extend outward from the fixed arm 101. At this time, the top of the second travel gear 110 meshes and moves on the fourth toothed plate 114. At this time, the bottom of the second travel gear 110 meshes with the first toothed plate 107, driving the second stage arm 106 to extend synchronously within the first stage arm 111. When the second stage arm 106 extends within the first stage arm 111, the bottom of the first travel gear 105 meshes and moves on the third toothed plate 112. At this time, the top of the first travel gear 105... The first arm 111 extends synchronously within the second arm 106 via meshing with the second toothed plate 109. In simple terms, with this structure, when the first arm 111 extends within the fixed arm 101, the second arm 106 within the first arm 111 extends synchronously; when the second arm 106 extends within the first arm 111, the third arm 108 within the second arm 106 extends synchronously. Simultaneously, the three sets of detection disc assemblies 300 are respectively fixed to the ends of the first arm 111, the second arm 106, and... At the end of the three-stage arm 108, the three sets of detection disk assemblies 300 are extended synchronously and equidistantly within the cylinder in this manner. This enables synchronous and equidistant detection of multiple detection positions when detecting the internal diameter, roundness, and straightness of the cylinder. Moreover, this method ensures that the detection distance between adjacent sets of detection disk assemblies 300 remains equidistant, i.e., the detection spacing increases synchronously, thus maintaining equidistant detection. During detection, multiple laser rangefinders 306 mounted on the slip ring 308 synchronously detect and collect radius data.

[0049] Based on the above, after the test is completed, the first hydraulic cylinder 104 drives the first-stage arm 111 to retract into the fixed arm 101. This process is the reverse of the above process, that is, the distance between the three sets of detection disc assemblies 300 becomes smaller. When two adjacent sets of detection disc assemblies 300 come into contact with each other, the second push rod arm 310 on the rear detection disc assembly 300 will come into contact with the slip ring 308 on the front detection disc assembly 300 and push the slip ring 308 closer to the back plate 301. During the pushing process, since the guide rail slide column 309 slides within the guide rail slide groove 304, the slip ring 308 rotates on the disc shaft 302 and moves towards the back plate 301. 1. The approaching contact action: During this process, the laser rangefinder 306 on the slip ring 308 spins into the brush arm 305. Through this contact between the two adjacent sets of detection disk assemblies 300, the laser rangefinder 306 approaches and spins into the brush arm 305. On the one hand, it achieves the spin cleaning of the top of the laser rangefinder 306, and on the other hand, it allows the laser rangefinder 306 to be stored in the brush arm 305. Thus, the brush arm 305 protects the laser rangefinder 306, achieving storage and protection when not in use, and avoiding damage from impacts or dust accumulation on the detection end of the precision detection instrument when not in use.

[0050] The slip ring 308 of this invention can be externally mounted with a support arm 307 for tools used for data acquisition or detection, such as a coordinate measuring machine or a laser scanner. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0051] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tool for detecting the internal diameter, roundness, and straightness of a cylinder, comprising an equidistant detection arm assembly (100), characterized in that: The equidistant detection arm assembly (100) is surrounded by an auxiliary equidistant detection arm assembly (100) that is mounted on the axis of the cylinder. The equidistant detection arm assembly (100) has three sets of detection disk assemblies (300) at one end. The equidistant detection arm assembly (100) is equipped with an equidistant drive module. Through the equidistant drive module, the three sets of detection disk assemblies (300) can perform equidistant detection on the inner wall of the cylinder. A flexible push module is provided between the equidistant detection arm assembly (100) and the axis correction arm assembly (200). Through the flexible push module, the axis correction arm assembly (200) drives the equidistant detection arm assembly (100) to perform self-adjusting detection in the variable diameter cylinder. The detection disk assembly (300) includes a back disk (301), a disk shaft (302) is fixedly disposed on the inner side of the back disk (301), and multiple brush arms (305) are fixedly disposed on the edge of the back disk (301). A slip ring (308) is slidably sleeved on the disk shaft (302), and multiple laser rangefinders (306) are fixedly disposed on the slip ring (308) through a support arm (307). The detection disk assembly (300) is provided with a self-rotation protection module. When two adjacent sets of detection disk assemblies (300) come into contact with each other through the self-rotation protection module, the laser rangefinders (306) spin into the brush arms (305) to perform self-rotation cleaning and self-rotation protection. The self-rotating protection module includes a guide rail groove (304), a guide rail column (309), a clamping spring (303), and a second push rod arm (310). The guide rail column (309) is fixedly installed on the inner wall of the slip ring (308). The guide rail groove (304) is opened on the outer wall of the disc shaft (302). The clamping spring (303) is sleeved on the disc shaft (302). The second push rod arm (310) is fixed on the outer wall of the back plate (301).

2. The tool for detecting the internal diameter, roundness, and straightness of a cylinder according to claim 1, characterized in that: The equidistant detection arm assembly (100) includes a fixed arm (101), a first-stage arm (111) is slidably disposed inside the fixed arm (101), a second-stage arm (106) is slidably disposed inside the first-stage arm (111), and a third-stage arm (108) is slidably disposed inside the second-stage arm (106). A first hydraulic cylinder (104) and an end cover (103) are disposed at one end of the fixed arm (101), and a first push rod arm (113), an end ear (115) and a second hydraulic cylinder (116) are disposed at the other end of the fixed arm (101). A push spring (102) is disposed inside the end cover (103). The flexible jacking module includes a second hydraulic cylinder (116), an end cover (103), and a jacking spring (102). The end cover (103) is fixedly installed at one end of the fixed arm (101) away from the first jacking arm (113). The jacking spring (102) is fixedly installed inside the end cover (103). The second hydraulic cylinder (116) is fixedly installed on the outer wall of the fixed arm (101).

3. The tool for detecting the internal diameter, roundness, and straightness of a cylinder according to claim 2, characterized in that: The equidistant drive module includes a fourth toothed plate (114), a third toothed plate (112), a second traveling gear (110), a first traveling gear (105), a first toothed plate (107), and a second toothed plate (109). The fourth toothed plate (114) is fixedly installed in a transverse groove opened in the inner wall of the fixed arm (101). The third toothed plate (112) is fixedly installed in a transverse groove opened in the inner wall of the first-stage arm (111). The second traveling gear (110) is rotatably installed on the body of the first-stage arm (111). The first traveling gear (105) is rotatably installed on the body of the second-stage arm (106). The first toothed plate (107) is fixedly installed in a transverse groove opened in the outer wall of the second-stage arm (106). The second toothed plate (109) is fixedly installed in a transverse groove opened in the inner wall of the third-stage arm (108).

4. The tool for detecting the internal diameter, roundness, and straightness of a cylinder according to claim 3, characterized in that: The axis correction arm assembly (200) includes a correction disk (201), and a plurality of support arms (203) are arranged around the correction disk (201). An auxiliary arm (202) is hinged between the support arm (203) and the correction disk (201). A walking wheel (205) is rotatably arranged at one end of the support arm (203), and a drive motor (204) is arranged on the outer side of one end of the support arm (203).

5. A tool for detecting the internal diameter, roundness, and straightness of a cylinder according to claim 4, characterized in that: The three sets of detection disc assemblies (300) are respectively fixed at the ends of the first-stage arm (111), the second-stage arm (106), and the third-stage arm (108). When the first-stage arm (111) slides inside the fixed arm (101), the top of the second traveling gear (110) meshes with the fourth toothed plate (114). When the second-stage arm (106) slides inside the first-stage arm (111), the bottom of the second traveling gear (110) meshes with the first toothed plate (107), and the bottom of the first traveling gear (105) meshes with the third toothed plate (112). When the third-stage arm (108) slides inside the second-stage arm (106), the top of the first traveling gear (105) meshes with the second toothed plate (109). The output end of the first hydraulic cylinder (104) is fixedly connected to the rear end of the first-stage arm (111).

6. The tool for detecting the internal diameter, roundness, and straightness of a cylinder according to claim 4, characterized in that: The calibration disc (201) is sleeved outside the fixed arm (101), and the calibration disc (201) is located between the push spring (102) and the fixed arm (101). The push spring (102) abuts against one side of the calibration disc (201), and the extension rod of the second hydraulic cylinder (116) abuts against the other side of the calibration disc (201). The end of the support arm (203) away from the traveling wheel (205) is rotatably mounted on the end ear (115).

7. The tool for detecting the internal diameter, roundness, and straightness of a cylinder according to claim 4, characterized in that: The guide rail slide column (309) is inserted into the guide rail slide groove (304), and the two ends of the clamping spring (303) abut against the back plate (301) and the slip ring (308) respectively.

Images