Linear guide rail pair precision detection device and detection method thereof

Abstract

The invention relates to the technical field of guide rail detection, in particular to a linear guide rail pair precision detection device and a detection method thereof. Comprising a detection table, a driving device, a guide rail and a fixing device, the driving device is used for driving a track box slidably arranged on the surface of the detection table, a frame is slidably arranged on the track box, a dial indicator, an adjusting mechanism, an ejection mechanism and a marking mechanism are slidably arranged on the frame, and the adjusting mechanism is used for keeping the ejection mechanism and the dial indicator attached to the guide rail during testing. When the ejection ejector rod slides to the position of the fixing hole, the elastic potential energy of the stop plate is used for pushing the stop plate to move, the ejection ejector rod extends into the fixing hole in the guide rail, the stop rod exerts pressure on the wedge block, the dial indicator moves downwards in the longitudinal direction, and therefore the longitudinal abrasion condition on the guide rail is detected. And moreover, by detecting and analyzing a plurality of point positions on the guide rail, the abrasion condition of the guide rail can be known more comprehensively, and the detection accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of guide rail detection, and specifically, to a precision detection device for a linear guide rail pair and a detection method thereof. Background Art

[0002] Under the existing technical conditions, to achieve high-precision reciprocating motion within a straight line range, a servo motor is usually connected to mechanical mechanisms such as synchronous belt pulleys, gear racks, or lead screws as a driving device, and relevant devices such as linear guide rails and circular guide rails are used as linear guiding devices.

[0003] Regarding the detection of guide rails, there are many existing technologies, for example:

[0004] Chinese Patent Publication No. CN106225738B discloses a linear guide rail precision detection device and a measurement method thereof. The device includes a bed body. On the left and right sides of the bed body, there are respectively a set of mutually parallel linear guide rail pairs. A bridge is fixedly connected to the guide rail pairs. A driving device is arranged below the left side of the bridge. A disc measuring frame is fixedly installed in the middle of the bridge. Seven non-contact displacement sensors are symmetrically arranged on the measuring frame, respectively aiming at the center of the top surface of the measured guide rail, the left and right rolling tracks on the upper surface of the measured guide rail, the reference side surface of the measured guide rail, the non-reference side surface of the measured guide rail, and the left and right sides in the width direction of the bottom surface of the measured guide rail. A linear guide rail pair is arranged at the bottom of the bed body. Above the guide rail pair, there are three identical Z-axis linear sliding tables that can independently move along the length direction of the bed body. A bracket for supporting the measured guide rail is arranged on the sliding table.

[0005] As Figure 6 shown, when the load distribution on the slider of the guide rail is uneven, that is, when the load on the slider biases towards the inner side of the guide rail, the inner side of the guide rail will bear greater pressure, which easily leads to aggravated wear of the guide rail, forming a wear angle on the inner side of the guide rail. Due to the formed wear angle, the surface of the guide rail is uneven, which will affect the service life of the guide rail. Summary of the Invention

[0006] The purpose of the present invention is to provide a precision detection device for a linear guide rail pair and a detection method thereof. The elastic potential energy of a stop baffle is used to push the stop baffle to move. An ejection ejector rod extends into a fixing hole on the guide rail. A stop rod applies pressure to a wedge block, causing a dial indicator to move downward along the longitudinal direction, thereby detecting the longitudinal wear condition on the guide rail, so as to solve the problems raised in the above background art.

[0007] To achieve the above object, the precision detection device for linear guide pairs includes a detection table, a driving device, a guide rail, and a fixing device. The driving device is used to drive a track box slidably arranged on the surface of the detection table. A frame is slidably arranged on the track box, and a dial indicator, an adjusting mechanism, an ejection mechanism, and a marking mechanism are slidably arranged on the frame. The adjusting mechanism is used to keep the ejection mechanism and the dial indicator in contact with the guide rail during testing. The ejection mechanism is located in the middle of the frame and has the same height as the fixing hole on the guide rail. When the frame moves into the fixing hole, the ejection mechanism is used to apply pressure to the dial indicator, so that the dial indicator moves downward in the longitudinal direction at the middle position between the two fixing holes to detect surface defects in the longitudinal direction of the guide rail, and cooperate with the marking mechanism to mark the defect position under the action of external force.

[0008] The ejection mechanism includes an ejection ejector rod slidably connected to the guide rail and a sliding rod penetrating the frame. And the ejection mechanism further includes a compression spring sleeved on the sliding rod and used for energy storage. One end of the compression spring abuts against the inner wall of the frame, and the other end abuts against a stop baffle coaxially connected to the sliding rod. A stop rod is fixedly arranged on the sliding rod, and the bottom of the stop rod abuts against a wedge block with an inclined surface.

[0009] In the above technical solution, mainly use the stop rod to push the stop baffle to move, so that the ejection ejector rod extends into the fixing hole. At the same time, the horizontal movement of the stop rod exerts pressure on the wedge block and forms a vertical downward component force to push the wedge block to move, that is, the detection head of the dial indicator moves downward, and the detection head will slide along the surface of the guide rail, so as to detect the wear in the longitudinal direction of the guide rail.

[0010] In addition, the power source of the above stop rod is as follows: A return spring is elastically connected between the bottom of the wedge block and the frame, and the elastic potential energy of the return spring is less than the elastic potential energy of the compression spring. Therefore, when the ejection ejector rod extends into the fixing hole, the stop rod exerts pressure on the wedge block, so that the dial indicator moves along the surface in the longitudinal direction of the guide rail to detect the defects on the surface of the guide rail.

[0011] A support is fixedly arranged between the frame and directly above the dial indicator, and a marking rod is slidably connected to the support. A sponge ball is arranged at one end of the marking rod close to the guide rail, and a baffle is arranged in the middle of the marking rod. A horizontal spring is elastically connected between the baffle and the support.

[0012] In the above technical solution: By manually observing the rotation of the pointer on the dial of the dial indicator, if the rotation amplitude of the pointer exceeds the preset wear threshold of the guide rail, press the support to make the sponge ball mark at this point to initially determine the wear position of the guide rail.

[0013] In summary, the present invention also provides a detection method for operating the above-mentioned precision detection device for linear guide pairs, including the following method steps:

[0014] S1. Place the guide rail to be detected on the detection table and clamp it through the fixing device. Then, make the ejector rod and the micrometer fit with the guide rail through the adjusting mechanism.

[0015] S2. During the detection, drive the track box to move through the driving device, so that the frame moves along the traveling direction and is gradually detected.

[0016] S3. When the ejector rod slides into the fixing hole, use the elastic potential energy of the compression spring to push the sliding rod to move, and the stop rod acts on the wedge block, so that the micrometer moves downward to detect the surface of the guide rail at this point.

[0017] S4. When the ejector rod disengages from the fixing hole, the compression spring compresses and stores energy again, providing kinetic energy for detecting the next detection point.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] In the linear guide pair precision detection device and its detection method, when the ejector rod slides to the position of the fixing hole, use the elastic potential energy of the stop baffle to push the stop baffle to move. The ejector rod extends into the fixing hole on the guide rail, and the stop rod applies pressure to the wedge block, so that the micrometer moves downward along the longitudinal direction, thereby detecting the longitudinal wear condition on the guide rail. Moreover, through the detection and analysis of multiple points on the guide rail, the wear condition of the guide rail can be more comprehensively understood, improving the accuracy of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the overall structural schematic diagram of the present invention;

[0021] Figure 2 is the exploded structural schematic diagram of the frame and the track box of the present invention;

[0022] Figure 3 is the top view of the sectional structure of the guide rail of the present invention;

[0023] Figure 4 is the sectional structural schematic diagram of the frame of the present invention;

[0024] Figure 5 is the exploded structural schematic diagram of the ejector rod, the support table frame and the return spring of the present invention;

[0025] Figure 6 is the structural schematic diagram of the detection principle of the micrometer of the present invention;

[0026] Figure 7 is the structural schematic diagram of the sponge ball marking principle of the present invention.

[0027] The meanings of the reference numerals in the figure are as follows:

[0028] 100. Detection table; 101. Driving device; 102. Guide rail; 103. Fixing device;

[0029] 110. Frame; 111. Track box; 112. Micrometer; 113. Bracket; 114. Support table frame; 115. Chute;

[0030] 120. Adjusting mechanism; 121. Connecting plate; 122. Adjusting rod; 123. Roller;

[0031] 130. Ejection mechanism; 131. Ejection ejector rod; 132. Slide bar; 133. Compression spring; 134. Stop bar; 135. Stop baffle;

[0032] 140. Marking mechanism; 141. Sponge ball; 142. Marking rod; 143. Horizontal spring;

[0033] 150. Limit slider; 151. Wedge block; 152. Return spring. Specific embodiments

[0034] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0035] As Figure 1 . Figure 2 And Figure 3 shown, a linear guide pair precision detection device is provided, including a detection table 100, a driving device 101, a guide rail 102, and a fixing device 103. The driving device 101 is used to drive the track box 111 slidably arranged on the surface of the detection table 100. Among them, the track box 111 can be penetrated by a guide rod, and the guide rod is used to balance the friction force brought by the rotation of the driving device 101 to keep the track box 111 stable in the traveling direction. A frame 110 is slidably arranged on the track box 111, and a micrometer 112, an adjusting mechanism 120, an ejection mechanism 130, and a marking mechanism 140 are slidably arranged on the frame 110. The adjusting mechanism 120 is used to keep the ejection mechanism 130 and the micrometer 112 in contact with the guide rail 102 during testing. The ejection mechanism 130 is located in the middle of the frame 110 and has the same height as the fixing hole on the guide rail 102. When the frame 110 moves into the fixing hole, the ejection mechanism 130 is used to apply pressure to the micrometer 112, so that the micrometer 112 moves downward in the longitudinal direction at the middle position between the two fixing holes to detect the surface defects in the longitudinal direction of the guide rail 102, and cooperate with the marking mechanism 140 to mark the defect position under the action of an external force.

[0036] First, before detecting the surface accuracy of the guide rail 102, it needs to be clear that: the fixing holes on each guide rail 102 are trigger points, and the positions between two adjacent fixing holes are detection points and marking points. That is to say, when the ejection mechanism 130 moves to the trigger point, the micrometer 112 moves to the detection point. The ejection mechanism 130 presses on the micrometer 112, causing the micrometer 112 to move downward along the longitudinal direction of the guide rail 102. At this time, the micrometer 112 detects the surface of the guide rail 102. If the value displayed on the micrometer 112 exceeds the preset wear threshold, an external force is applied manually to the marking mechanism 140 to mark the guide rail 102 at this detection point. Otherwise, no marking operation is performed.

[0037] Secondly, the preset wear threshold of the above-mentioned guide rail 102 can be evaluated accordingly according to parameters such as the type, use, and safety performance requirements of the guide rail 102.

[0038] Then, the guide rail 102 is placed on the detection table 100 and clamped and fixed by the fixing device 103. The distance between the ejection mechanism 130 and the micrometer 112 and the guide rail 102 is controlled by the adjusting mechanism 120. Then, the frame 110 and the track box 111 are fixed together by using the fixing knob on the track box 111. Therefore, on the basis of the above illustration, combined with Figure 4 As shown, the structure of the adjusting mechanism 120 is further disclosed. The adjusting mechanism 120 includes an adjusting rod 122 passing through the frame 110, and a connecting plate 121 fixedly connected to the upper and lower adjusting rods 122. The adjusting rod 122 is slidably connected to the frame 110, and a roller 123 that rests on the back of the guide rail 102 is rotatably connected to the end of the adjusting rod 122 away from the connecting plate 121. A adjusting knob that abuts against the frame 110 is threadedly connected to the connecting plate 121.

[0039] After the guide rail 102 is fixed, the distance between the micrometer 112 and the ejection mechanism 130 and the guide rail 102 is controlled by rotating the adjusting knob. Among them, the roller 123 is in contact with the side of the back of the guide rail 102. The rotating adjusting knob abuts against the frame 110, causing the ejection mechanism 130 to be in contact with the guide rail 102. The micrometer 112 is adjusted so that its detection head is compressed inward. Then, the frame 110 and the track box 111 are fixed into one body by using the fixing knob. In this way, under the action of the driving device 101, the frame 110 moves along the traveling direction.

[0040] The reason for adjusting the micrometer 112 so that its detection head is compressed inward is that as Figure 6As shown, when the load distribution of the slider on the guide rail 102 is uneven, that is, when the load on the slider biases towards the inner side of the guide rail 102, the inner side of the guide rail 102 will bear greater pressure, which easily leads to increased wear of the guide rail 102, forming a wear angle on the inner side of the guide rail 102. Since the surface of the guide rail 102 is uneven after the formation of the wear angle, it will affect the service life of the guide rail 102. If the detection head of the dial indicator 112 is in the released state, during the downward movement of the dial indicator 112, it will disengage from the wear surface, thus affecting the detection accuracy.

[0041] Therefore, when detecting the accuracy of the inner side of the guide rail 102, the power source of the dial indicator 112 is the ejection mechanism 130. Under the action of the ejection mechanism 130, the dial indicator 112 moves downward along the longitudinal direction of the cross-section of the guide rail 102, that is Figure 6 the direction pointed by the arrow f in

[0042] In this way, returning to Figure 4 and combining with Figure 5 As shown, the ejection mechanism 130 includes an ejection ejector rod 131 slidably connected to the guide rail 102 and a slide rod 132 passing through the frame 110. The ejection ejector rod 131 is fixedly connected to the slide rod 132, and the slide rod 132 is slidably connected to the frame 110. In the normal state, the ejection ejector rod 131 slides along the surface of the guide rail 102, and the end of the ejection ejector rod 131 is arc-shaped to smoothly disengage from the fixing hole on the guide rail 102. On the other hand, the ejection mechanism 130 also includes a compression spring 133 sleeved on the slide rod 132 and used for energy storage. One end of the compression spring 133 abuts against the inner wall of the frame 110, and the other end abuts against a stop plate 135 coaxially connected to the slide rod 132. When the end of the ejection ejector rod 131 is in contact with the guide rail 102, the compression spring 133 is in a compressed state, and when the end of the ejection ejector rod 131 extends into the fixing hole, the compression spring 133 is in a released state.

[0043] Specifically during operation: When the ejection ejector rod 131 is adjusted to contact the surface of the guide rail 102, the compression spring 133 is in a compressed state for energy storage at this time. At the same time, the detection head of the dial indicator 112 also remains in a compressed state. The driving device 101 drives the track box 111 to move the connecting plate 121 along the traveling direction. When the ejection ejector rod 131 moves into the first fixing hole, the detection head of the dial indicator 112 is located at the center position between two adjacent fixing holes. Then, use the elastic potential energy of the stop rod 134 to push the stop plate 135 to move, so that the ejection ejector rod 131 extends into the fixing hole. As the detection head of the dial indicator 112 moves downward, the detection head will be released along the direction of the arrow h, thereby detecting the wear in the longitudinal direction of the guide rail 102.

[0044] Also, since a stop bar 134 is fixedly arranged on the slide bar 132, the bottom of the stop bar 134 is in contact with a wedge block 151 having an inclined surface. A limit slider 150 fixedly connected to the slide bar 134 is slidably connected to the frame 110. The limit slider 150 is slidably connected to a chute 115 opened at a corresponding position inside the frame 110. The chute 115 is used to limit the offset of the dial indicator 112 and enable it to move in the longitudinal direction.

[0045] Moreover, a return spring 152 is elastically connected between the bottom of the wedge block 151 and the frame 110. The elastic potential energy of the return spring 152 is less than the elastic potential energy of the compression spring 133. When the ejection ejector rod 131 extends into the fixing hole, the stop bar 134 is used to press the wedge block 151, so that the dial indicator 112 moves along the surface in the longitudinal direction of the guide rail 102 to detect defects on the surface of the guide rail 102. A support table frame 114 for adjusting the position of the dial indicator 112 is fixedly arranged between the limit slider 150 and the dial indicator 112.

[0046] That is to say, when the ejection ejector rod 131 slides to the position of the fixing hole, the elastic potential energy of the stop plate 135 is utilized to push the stop plate 135 to move. The ejection ejector rod 131 extends into the fixing hole on the guide rail 102. The stop bar 134 applies pressure to the wedge block 151, causing the dial indicator 112 to move downward along the longitudinal direction, thereby detecting the longitudinal wear condition on the guide rail 102. Moreover, by detecting and analyzing multiple points on the guide rail 102, the wear condition of the guide rail 102 can be more comprehensively understood, and the accuracy of detection can be improved.

[0047] Not only that, limit holes are opened at one end of the slide bar 132 away from the ejection ejector rod 131 and on the frame 110. By adjusting the knob on the support table frame 114, the initial point height of the detection head of the dial indicator 112 on the guide rail 102 is controlled. Then, when the limit hole on the slide bar 132 coincides with the limit hole on the frame 110, an insertion rod is inserted into the limit hole to restrict the movement of the slide bar 132. At this time, the ejection ejector rod 131 is separated from the surface of the guide rail 102. Thus, Figure 1 the drive device 101 can drive the moving track box 111, thereby detecting the surfaces of the guide rails 102 at different height positions in the transverse direction and improving the diversity of detection.

[0048] When the dial indicator 112 detects the wear of the guide rail 102, since the dial indicator 112 needs to manually observe and record the index on the dial of the dial indicator 112 every time it detects a point to reflect the wear state of this point. Therefore, in combination with Figure 7As shown in the figure, a support 113 is fixedly arranged between the upper right of the dial indicator 112 and the frame 110. The support 113 is symmetrically arranged, and a marking rod 142 is slidably connected to the support 113. A sponge ball 141 is arranged at one end of the marking rod 142 close to the guide rail 102. A baffle is provided in the middle of the marking rod 142, and a horizontal spring 143 is elastically connected between the baffle and the support 113.

[0049] In this way, by manually observing the rotation of the pointer on the dial of the dial indicator 112, if the amplitude of the pointer rotation exceeds the preset wear threshold of the guide rail 102 (for example: half a turn of the pointer rotation is considered to exceed, otherwise it is not exceeded), then press the support 113 to make the sponge ball 141 mark at this point to preliminarily determine the wear position of the guide rail. On the contrary, no marking is made and the next point is continuously detected until the detection is completed. After each marking is completed, the sponge ball 141 automatically separates from the marking point through the horizontal spring 143.

[0050] The above method of manually observing the values on the dial is a rough judgment of the wear condition of the surface of the guide rail 102. After the detection is completed, the marked points are analyzed, and then, more precise equipment is used to further refine the detection of the marked points, so as to accurately detect the wear of the guide rail.

[0051] In summary, this embodiment also provides a detection method for a linear guide pair precision detection device, including the following method steps:

[0052] S1. Place the guide rail 102 to be detected on the detection table 100 and clamp it through the fixing device 103. Then, make the ejection ejector rod 131 and the dial indicator 112 fit with the guide rail 102 through the adjusting mechanism 120.

[0053] S2. During the detection, drive the track box 111 to move through the driving device 101, so that the frame 110 moves along the traveling direction and gradually performs the detection.

[0054] S3. When the ejection ejector rod 131 slides into the fixing hole, use the elastic potential energy of the compression spring 133 to push the sliding rod 132 to move, and the stop rod 134 acts on the wedge block 151 to make the dial indicator 112 move downward to detect the surface of the guide rail 102 at this point.

[0055] S4. When the ejection ejector rod 131 disengages from the fixing hole, the compression spring 133 compresses again to store energy, providing kinetic energy for detecting the next detection point.

[0056] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and the descriptions in the specification are only preferred examples of the present invention, and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A precision detection device for a linear guide pair, comprising a detection table (100), a driving device (101), a guide rail (102), and a fixing device (103), characterized in that: The driving device (101) is used to drive the track box (111) slidably arranged on the surface of the inspection table (100). A frame (110) is slidably arranged on the track box (111). A dial indicator (112), an adjusting mechanism (120), an ejection mechanism (130) and a marking mechanism (140) are slidably arranged on the frame (110). The adjusting mechanism (120) is used to keep the ejection mechanism (130) and the dial indicator (112) in contact with the guide rail (102) during the test. The ejection mechanism (130) is located in the middle of the frame (110) and has the same height as the fixing hole on the guide rail (102). When the frame (110) moves into the fixing hole, the ejection mechanism (130) is used to apply pressure to the dial indicator (112), so that the dial indicator (112) moves downward in the longitudinal direction at the middle position between the two fixing holes to detect the surface defects in the longitudinal direction of the guide rail (102), and cooperate with the marking mechanism (140) to mark the defect position under the action of external force.

2. The linear guide pair precision detection device according to claim 1, characterized in that: The adjusting mechanism (120) includes an adjusting rod (122) passing through the frame (110), and a connecting plate (121) fixedly connected to the upper and lower adjusting rods (122). The adjusting rod (122) is slidably connected to the frame (110), and a roller (123) that rests on the back of the guide rail (102) is rotatably connected to the end of the adjusting rod (122) away from the connecting plate (121). An adjusting knob that abuts against the frame (110) is threadedly connected to the connecting plate (121).

3. The precision detection device for linear guide pairs according to claim 1, wherein: The ejection mechanism (130) includes an ejection ejector rod (131) slidably connected to the guide rail (102), and a slide rod (132) passing through the frame (110). The ejection ejector rod (131) is fixedly connected to the slide rod (132). The slide rod (132) is slidably connected to the frame (110). Under normal conditions, the ejection ejector rod (131) slides along the surface of the guide rail (102), and the end of the ejection ejector rod (131) is arc-shaped to smoothly disengage from the fixing hole on the guide rail (102).

4. The linear guide pair precision detection device according to claim 3, characterized in that: The ejection mechanism (130) further includes a compression spring (133) sleeved on the slide rod (132) and used for energy storage. One end of the compression spring (133) abuts against the inner wall of the frame (110), and the other end abuts against a stop plate (135) coaxially connected to the slide rod (132). When the end of the ejection ejector rod (131) is in contact with the guide rail (102), the compression spring (133) is in a compressed state. When the end of the ejection ejector rod (131) extends into the fixing hole, the compression spring (133) is in a released state.

5. The precision detection device for linear guide pairs according to claim 4, characterized in that: A stop rod (134) is fixedly arranged on the slide rod (132). The bottom of the stop rod (134) abuts against a wedge block (151) with an inclined surface. A limit slider (150) slidably connected to the frame (110) is fixedly arranged on one side of the stop rod (134). The limit slider (150) is slidably connected to a chute (115) opened at the corresponding position in the frame (110). The chute (115) is used to limit the offset of the dial indicator (112) so that it moves in the longitudinal direction.

6. The linear guide pair precision detection device according to claim 5, characterized in that: A return spring (152) is elastically connected between the bottom of the wedge block (151) and the frame (110). The elastic potential energy of the return spring (152) is less than that of the compression spring (133). When the ejection ejector rod (131) extends into the fixing hole, the stop rod (134) is used to press the wedge block (151), so that the dial indicator (112) moves along the longitudinal surface of the guide rail (102) to detect defects on the surface of the guide rail (102).

7. The precision detection device for linear guide pairs according to claim 5, wherein: A support dial frame (114) for adjusting the position of the dial indicator (112) is fixedly arranged between the limit slider (150) and the dial indicator (112).

8. The linear guide pair precision detection device according to claim 3, wherein: Limit holes are provided at one end of the slide rod (132) away from the ejection ejector rod (131) and on the frame (110).

9. The linear guide pair precision detection device according to claim 8, characterized in that: A bracket (113) is fixedly arranged between the frame (110) directly above the dial indicator (112). The bracket (113) is symmetrically arranged, and a marking rod (142) is slidably connected to the bracket (113). A sponge ball (141) is arranged at one end of the marking rod (142) close to the guide rail (102). A baffle is provided in the middle of the marking rod (142), and a horizontal spring (143) is elastically connected between the baffle and the bracket (113).

10. A detection method for operating the precision detection device of the linear guide pair described in claim 6, characterized in that, It includes the following method steps: S1. Place the guide rail (102) to be detected on the detection table (100) and clamp and fix it through the fixing device (103). Then, make the ejection ejector rod (131) and the dial indicator (112) fit with the guide rail (102) through the adjusting mechanism (120). S2. During detection, drive the track box (111) to move through the driving device (101), so that the frame (110) moves along the traveling direction and gradually performs detection. S3. When the ejection ejector rod (131) slides into the fixing hole, use the elastic potential energy of the compression spring (133) to push the slide rod (132) to move. The stop rod (134) acts on the wedge block (151), so that the dial indicator (112) moves downward to detect the surface of the guide rail (102) at this point. S4. When the ejection ejector rod (131) disengages from the fixing hole, the compression spring (133) compresses and stores energy again to provide kinetic energy for detecting the next detection point.

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