Connecting rod detection equipment and detection method

Abstract

The embodiment of the invention relates to a detection device, in particular to a connecting rod detection device and method, and the method comprises the following steps: providing a positioning tool to position a connecting rod; measuring a first distance between one end of the first positioning shaft and one end of the second positioning shaft, and measuring a second distance between the other end of the first positioning shaft and the other end of the second positioning shaft; detecting whether two side end faces of the connecting rod are flat along the axis directions of the first shaft hole and the second shaft hole, and obtaining a detection result; and according to the measured first distance, the second distance and a detection result obtained through detection, whether machining of the connecting rod is qualified or not is judged, and a judgment result is obtained. Compared with the prior art, the detection method not only can effectively detect the coaxiality among the shaft holes of the connecting rod, but also can effectively detect whether the planes on the two sides of the connecting rod are flat or not, so that the detection cost is saved, and the detection efficiency is improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to a detection device, and more particularly to a connecting rod detection device and detection method. Background Technology

[0002] In a traditional internal combustion engine, a crankshaft cam mechanism converts the reciprocating motion of the piston into the rotational motion of the crankshaft, which then drives the corresponding moving parts to output power. Similarly, in a traditional air compressor, a crankshaft cam mechanism can convert the rotational motion of the crankshaft into the reciprocating linear motion of the piston, which then compresses the air in the cylinder.

[0003] However, in crank cam mechanisms, the connecting rod is a crucial component that drives the cylinder for compression, making its machining accuracy particularly important. This accuracy includes the coaxiality between the connecting rod's shaft holes and the flatness of the connecting rod's two side planes. However, the inventors have discovered that currently, measuring the coaxiality of the connecting rod's shaft holes and the flatness of the connecting rod's two side planes requires changing multiple different inspection fixtures for effective testing. This not only increases inspection costs but also makes the entire connecting rod inspection process extremely cumbersome and wastes a significant amount of manpower. Summary of the Invention

[0004] The purpose of this invention is to design a connecting rod testing device and method, which can not only perform limited testing on the coaxiality between the shaft holes of the connecting rod after the connecting rod is positioned, but also effectively test whether the two side planes of the connecting rod are flat. This saves testing costs, greatly simplifies the entire testing process, and improves testing efficiency.

[0005] To achieve the above objectives, embodiments of the present invention provide a link detection device, the link detection device comprising:

[0006] A positioning fixture is used to position a connecting rod. The positioning fixture includes: a base, a first positioning shaft that can pass through a first shaft hole of the connecting rod, and a second positioning shaft that can pass through a second shaft hole of the connecting rod. When the first positioning shaft and the second positioning shaft are respectively passed through the first shaft hole and the second shaft hole, the first positioning shaft and the second positioning shaft are opposite to each other on the base, and the two ends of the first positioning shaft are respectively exposed on both sides of the first shaft hole, and the two ends of the second positioning shaft are respectively exposed on both sides of the second shaft hole.

[0007] A distance measuring device is used to measure a first distance between one end of the first positioning shaft and one end of the second positioning shaft, and to measure a second distance between the other end of the first positioning shaft and the other end of the second positioning shaft;

[0008] A flatness testing device is used to measure whether the two end faces of the connecting rod are flat along the axial direction of the first shaft hole and the second shaft hole, and to obtain the test result;

[0009] The main control module is used to acquire the first distance and the second distance measured by the distance measuring device, and also to acquire the detection results of whether the two side planes are flat as detected by the flatness detection device, and to determine whether the processing of the connecting rod is qualified based on the acquired first distance, the second distance and the detection results, and to obtain the judgment result.

[0010] In addition, embodiments of the present invention also provide a link detection method, the link detection method comprising the following steps:

[0011] A positioning fixture is provided for positioning a connecting rod; wherein the positioning fixture includes: a base, a first positioning shaft and a second positioning shaft. When positioning the connecting rod, the first positioning shaft and the second positioning shaft are respectively inserted into the first shaft hole and the second shaft hole of the connecting rod, so that the first positioning shaft and the second positioning shaft are opposite to each other on the base, and the two ends of the first positioning shaft are respectively exposed on both sides of the first shaft hole, and the two ends of the second positioning shaft are respectively exposed on both sides of the second shaft hole.

[0012] Measure a first distance between one end of the first positioning shaft and one end of the second positioning shaft, and measure a second distance between the other end of the first positioning shaft and the other end of the second positioning shaft;

[0013] Along the axial direction of the first shaft hole and the second shaft hole, check whether the two end faces of the connecting rod are flat and obtain the test results;

[0014] Based on the measured first distance, second distance, and the obtained detection results, it is determined whether the processing of the connecting rod is qualified, and a judgment result is obtained.

[0015] Compared to the prior art, the embodiments of the present invention, through which the connecting rod detection equipment inserts the first and second positioning shafts of the positioning fixture into the first and second shaft holes of the connecting rod, respectively, and after the first and second positioning shafts have been inserted into the first and second shaft holes of the connecting rod, they can face each other on the base. At this time, a distance measuring device can detect the first distance between one end of the first positioning shaft and one end of the second positioning shaft, and a second distance between the other ends of the first and second positioning shafts. Simultaneously, a flatness detection device can detect whether the two end faces of the connecting rod are flat. Finally, the main control module can acquire the first and second distances measured by the distance measuring device, and the detection results of whether the two end faces of the connecting rod are flat obtained by the flatness detection device. Based on the acquired first and second distances and the detection results, it can determine whether the processing of the connecting rod is qualified and obtain a judgment result. It is evident that this connecting rod testing equipment can not only effectively detect the coaxiality between the various shaft holes of the connecting rod, but also effectively detect whether the end faces on both sides of the connecting rod are flat. This not only saves testing costs, but also greatly simplifies the entire testing process and improves testing efficiency. Attached Figure Description

[0016] Figure 1 This is an isometric schematic diagram of the positioning device when positioning the connecting rod in some embodiments of the present invention;

[0017] Figure 2 for Figure 1 The main view;

[0018] Figure 3 for Figure 2 Sectional view at point AA;

[0019] Figure 4 This is a schematic diagram showing the state when the angle ruler is pressed against the two end faces of the connecting rod in some embodiments of the present invention;

[0020] Figure 5 This is a block diagram of a linkage detection device system module in one embodiment of the present invention;

[0021] Figure 6 This is a flowchart illustrating the linkage detection method in some embodiments of the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of the present invention to facilitate a better understanding of this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various changes and modifications based on the following embodiments.

[0023] Example 1

[0024] The first embodiment of the present invention relates to a linkage detection device, such as... Figure 1 As shown, the linkage detection device includes: positioning fixture 1, distance measuring device 2, flatness detection device 3, and main control module 4.

[0025] Among them, combined Figure 1 As shown, the positioning fixture 1 is used to position the connecting rod 10. The positioning fixture 1 includes: a base 11, a first positioning shaft 12 that can pass through a first shaft hole 101 of the connecting rod 10, and a second positioning shaft 13 that can pass through a second shaft hole 102 of the connecting rod 10. When the first positioning shaft 12 and the second positioning shaft 13 are respectively inserted into the first shaft hole 101 and the second shaft hole 102, they are positioned opposite each other on the base 11. Simultaneously, after the first positioning shaft 12 has passed through the first shaft hole 101, both ends of the first positioning shaft 12 are exposed on both sides of the first shaft hole 102. Similarly, after the second positioning shaft 13 has passed through the second shaft hole 102, both ends of the second positioning shaft 13 are exposed on both sides of the second shaft hole 102.

[0026] Secondly, after the connecting rod 10 is positioned on the base 11 by the first positioning shaft 12 and the second positioning shaft 13, the distance measuring device 3 can measure the first distance between one end of the first positioning shaft 12 and one end of the second positioning shaft 13, and the second distance between the other end of the first positioning shaft 12 and the other end of the second positioning shaft 13. Simultaneously, along the axial direction of the first shaft hole 12 and the second shaft hole, the flatness detection device 3 can measure whether the two end faces of the connecting rod 10 are flat, and obtain the detection results.

[0027] Finally, combining Figure 5 As shown, the main control module 4 is used to acquire the first distance and the second distance measured by the distance measuring device 2, as well as the detection result obtained by the flatness detection device 3. Furthermore, the main control module 4 can also determine whether the processing of the connecting rod 10 is qualified based on the acquired first distance, the second distance and the detection result.

[0028] As can be seen from the above, since the connecting rod detection equipment can pass the first positioning shaft 12 and the second positioning shaft 13 of the positioning fixture 1 into the first shaft hole 101 and the second shaft hole 102 of the connecting rod 10 respectively, and after the first positioning shaft 12 and the second positioning shaft 13 have completed passing through the first shaft hole 101 and the second shaft hole 102 of the connecting rod 10 respectively, the first positioning shaft 12 and the second positioning shaft 13 can be opposite each other on the base 11. At this time, the distance measuring device 2 can detect the first distance between one end of the first positioning shaft 12 and one end of the second positioning shaft 13, and the second distance between the other end of the first positioning shaft 12 and the other end of the second positioning shaft 13. At the same time, the flatness detection device 3 can detect whether the two end faces of the connecting rod 10 are flat. Finally, the main control module 4 can acquire the first distance and the second distance measured by the distance measuring device 2, as well as the detection results of whether the two end faces of the connecting rod 10 are flat, obtained by the plane detection device 3. Based on the acquired first distance, second distance, and detection results, the main control module 4 can determine whether the machining of the connecting rod 10 is qualified and draw a judgment result. It is clear that this connecting rod inspection equipment can not only effectively detect the coaxiality between the shaft holes of the connecting rod 10, but also effectively detect whether the two end faces of the connecting rod 10 are flat. This saves inspection costs, greatly simplifies the entire inspection process, and improves inspection efficiency.

[0029] Specifically, in some embodiments, such as Figure 1 and Figure 3 As shown, the first positioning shaft 12 includes: a first positioning section 121 that can pass through the first shaft hole 101, a first head measuring section 122 and a first tail measuring section 123 that are coaxially connected to the first positioning section 121, and the first head measuring section 122 and the first tail measuring section 123 are respectively exposed outside the first shaft hole 101. Similarly, as Figure 1 and Figure 3 As shown, the second positioning shaft 13 includes: a second positioning section 131 that can pass through the second shaft hole 102; a second head measuring section 132 and a second tail measuring section 133 that are coaxially connected to the second positioning section 131; and the second head measuring section 132 and the second tail measuring section 133 are respectively exposed outside the second shaft hole 102. Wherein, as... Figure 1 and Figure 3As shown, the distance between the first head measuring segment 122 and the second head measuring segment 132 is the first distance, while the distance between the first tail measuring segment 123 and the second tail measuring segment 133 is the second distance. It is easy to see that, ideally, if the coaxiality of the first shaft hole 101 and the coaxiality of the second shaft hole 102 both meet the processing requirements, the distance difference between the first distance and the second distance measured by the distance measuring device 2 should be within a preset distance difference range, meaning the axis of the first shaft hole 101 and the axis of the second shaft hole 102 should be nearly parallel. Conversely, if the coaxiality of the first shaft hole 101 and / or the coaxiality of the second shaft hole 102 does not meet the processing requirements, the distance difference between the first distance and the second distance measured by the distance measuring device 2 will be greater than or less than the preset distance difference range, meaning the axis of the first shaft hole 101 and the axis of the second shaft hole 102 will be significantly non-parallel.

[0030] In addition, in order to improve the measurement accuracy of the first shaft hole 101 and the second shaft hole 102, in some embodiments, such as Figure 3 As shown, the first positioning shaft 12 can be a go / no-go gauge shaft, meaning that the first positioning segment 121 of the first positioning shaft 12 includes at least a first conical surface 1211 along its axial direction, and the first conical surface 1211 gradually expands from the first head measuring segment 122 toward the first tail measuring segment 123. Alternatively, in some other embodiments, the first conical surface 1211 may also gradually expand from the first tail measuring segment 123 toward the first head measuring segment 122. The first positioning segment 121 is used to engage with the first end 103 of the connecting rod 10, which is provided with the first shaft hole 101, after passing through the first shaft hole 101. It is thus easy to see that, since the first positioning segment 121 of the first positioning shaft 12 includes the first conical surface 1211 along its axial direction, when the first positioning segment 121 passes through the first shaft hole 101, the first positioning shaft 12 can achieve self-positioning within the first shaft hole 101 through the cooperation of the first conical surface 1211 and the first shaft hole 101.

[0031] Similarly, such as Figure 3 As shown, the second positioning shaft 13 can also be a go / no-go gauge shaft. The second positioning segment 131 of the second positioning shaft 13 includes at least a second conical surface 1311 along its axial direction, and the second conical surface 1311 gradually expands from the second head measuring segment 132 toward the second tail measuring segment 133. Alternatively, in other embodiments, such as Figure 1As shown, the second conical surface 1311 can also gradually expand from the second tail measuring section 133 toward the second head measuring section 132. The second positioning section 131 is used to engage with the second end 104 of the connecting rod 10, which is located in the second shaft hole 102, after passing through the second shaft hole 102. It is thus easy to see that, since the second positioning section 131 of the second positioning shaft 13 includes the second conical surface 1311 along its axial direction, when the second positioning section 131 passes through the second shaft hole 102, the second positioning shaft 13 can achieve self-positioning within the second shaft hole 102 through the cooperation of the second conical surface 1311 and the second shaft hole 102.

[0032] For example, combining Figure 3 As shown, when the first conical surface 1211 gradually expands from the first head measuring section 122 towards the first tail measuring section 123, during the process of inserting the first positioning shaft 12 into the first shaft hole 101, if the first positioning section 121 can be fully inserted into the first shaft hole 101, and the end of the first conical surface 1211 of the first positioning section 121 facing the first tail measuring section 123 can be exactly in contact with the hole wall of the first shaft hole 101, it can be concluded that the diameter of the first shaft hole 101 meets the processing requirements. Conversely, if the end of the first conical surface 1211 of the first positioning section 121 facing the first tail measuring section 123 cannot be in contact with the hole wall of the first shaft hole 101, it can be concluded that the diameter of the first shaft hole 101 is too large and does not meet the processing requirements. Alternatively, if the first positioning section 121 cannot be fully inserted into the first shaft hole 101, it can be concluded that the diameter of the first shaft hole 101 is too small and also does not meet the processing requirements. Similarly, when the second conical surface 1311 gradually expands from the second head measuring section 132 towards the second tail measuring section 133, during the insertion of the second positioning shaft 13 into the second shaft hole 102, if the second positioning section 131 can be fully inserted into the second shaft hole 102, and the end of the second conical surface 1311 of the second positioning section 131 facing the second tail measuring section 133 can be precisely fitted with the hole wall of the second shaft hole 102, then the diameter of the second shaft hole 102 meets the processing requirements. Conversely, if the end of the second conical surface 1311 of the second positioning section 131 facing the second tail measuring section 133 cannot be fitted with the hole wall of the second shaft hole 102, then the diameter of the second shaft hole 102 is too large and does not meet the processing requirements. Alternatively, if the second positioning section 131 cannot be fully inserted into the second shaft hole 102, then the diameter of the second shaft hole 102 is too small and also does not meet the processing requirements.

[0033] Furthermore, it is not difficult to see from the above that when the diameter of the first shaft hole 101 and the diameter of the second shaft hole 102 both meet the processing requirements, the first conical surface 1211 of the first positioning section 121 can fit against the hole wall of the first shaft hole 101. At the same time, the first head measuring section 122 and the first tail measuring section 123 of the first positioning shaft 12 are respectively exposed on both sides of the first shaft hole 101. Similarly, the second conical surface 1311 of the second positioning section 131 can fit against the hole wall of the second shaft hole 102. At the same time, the second head measuring section 132 and the second tail measuring section 133 of the second positioning shaft 13 are respectively exposed on both sides of the second shaft hole 102. At this time, the first distance between the first head measuring section 122 and the second head measuring section 132, and the second distance between the second head measuring section 132 and the second tail measuring section 133 can be measured by the distance measuring device 2. Furthermore, it should be noted that in some embodiments, the distance measuring device 2 may be an electronic vernier caliper, and the electronic vernier caliper may be communicatively connected to the main control module 4. This allows the first distance measured by the electronic vernier caliper to be the center distance between the first head measuring segment 122 and the first tail measuring segment 123, and the second distance measured by the electronic vernier caliper to be the center distance between the second head measuring segment 132 and the second tail measuring segment 133. The main control module 4 can acquire the first and second distances measured by the electronic vernier caliper and calculate the distance difference between the first and second distances. When the distance difference calculated by the main control module 4 is within a threshold range, a judgment result indicating that the first shaft hole 101 and the second shaft hole 102 of the connecting rod 10 are processed successfully can be obtained. When the distance difference calculated by the main control module 4 is not within the threshold range, a judgment result indicating that the first shaft hole 101 and the second shaft hole 102 of the connecting rod 10 are processed unsuccessfully can be obtained. Of course, in other embodiments, other devices may be used for the distance measuring device, but in this embodiment, the type of distance measuring device is not specifically limited.

[0034] Furthermore, in order to enable the base 11 to position the first positioning axis 12 and the second positioning axis 13, in other embodiments, such as Figure 1 and Figure 2 As shown, the base 11 includes: a base plate 111, a first support 112, a second support 113, and a snap-fit ​​assembly 114. Among them, combined with... Figure 2 and Figure 4 As shown, the substrate 111 has a base surface 1111 parallel to the horizontal plane. This base surface 1111 is used to place the flatness detection device 3, so that the detection surface of the flatness detection device 3 can abut against the two end faces of the connecting rod 10. Wherein, as... Figure 1 and Figure 2 As shown, the first support 112 and the second support 113 are disposed opposite to each other on the base surface 11, and the first support 112 is used to position the first positioning shaft 12, while the second support 113 is used to position the second positioning shaft 13. Additionally, as... Figure 1 and Figure 2 As shown, the snap-fit ​​assembly 114 is disposed on the side of the first support base 112 away from the substrate 111, and is used to cooperate with the first support base 112 to fix the first positioning shaft 12. Furthermore, it should be noted that in some embodiments, such as... Figure 4 As shown, the flatness detection device 3 includes: a square 31 and a light irradiation module 32. The square 31 has a first measuring surface 311 and a second measuring surface 312 perpendicular to the first measuring surface 311. The first measuring surface 311 can abut against the base surface 1111 of the substrate 111, while the second measuring surface 312 can abut against both end faces of the connecting rod 10. Specifically, the second measuring surface 312 of the square 31 can first abut against one end face 103 of the connecting rod 10. Then, infrared light is irradiated onto the contact area between the second measuring surface 312 and the end face 103 of the connecting rod 10 through the light irradiation module 32. By observing whether there is light leakage at the contact area between the second measuring surface 312 and the end face 103, the flatness of the end face 103 can be determined. Similarly, after completing the inspection of the end face 103 of the connecting rod 10, the second measuring surface 312 of the square 31 can be brought into contact with the other end face 104 of the connecting rod 10. Then, infrared light is irradiated onto the contact area between the second measuring surface 312 and the end face 104 of the connecting rod 10 through the light irradiation module 32. By observing whether there is light leakage at the contact area between the second measuring surface 312 and the end face 104, the inspection result of whether the end face 104 is flat can be obtained.

[0035] However, as a preferred embodiment, the flatness detection device 3 further includes a light receiving module 33, and the light receiving module 33 can be arranged opposite to the light receiving module 32 along the light irradiation direction of the light irradiation module 32, while... Figure 5 As shown, the light receiving module 33 is also communicatively connected to the main control module 4. Therefore, when the light irradiation module 32 irradiates infrared light onto the contact area where the second measuring surface 312 of the square 31 abuts against the end face 103 or end face 104 of the connecting rod 10, if light leakage occurs at the contact area of ​​the end face 103 or end face 104 of the second measuring surface 312 of the square 31, the leaked infrared light will be received by the light receiving module 33. At this time, the main control module 4 can determine that the two end faces of the connecting rod 10 do not meet the processing requirements. If the light receiving module 33 does not receive the infrared light emitted by the light irradiation module 32, the main control module 4 can determine that both end faces of the connecting rod 10 meet the processing requirements. Furthermore, it should be noted that in some embodiments, the light irradiation module 32 and the light receiving module 33 can jointly constitute an infrared light sensor. Of course, in other embodiments, the light irradiation module 32 and the light receiving module 33 can also use other sensing elements. In this embodiment, the types of the light irradiation module 32 and the light receiving module 33 are not specifically limited.

[0036] In addition, in order to enable the first support 112 to cooperate with the snap-fit ​​assembly 114 to position the first positioning shaft 12, in some embodiments, such as Figure 2 As shown, the side of the first support base 112 away from the base surface 1111 includes: a first horizontal positioning surface 1121 parallel to the base surface 1111, a first vertical positioning surface 1122 perpendicular to the first horizontal positioning surface 1121, and a first mounting surface 1123 connected to the side of the first vertical positioning surface 1122 away from the first horizontal positioning surface 1121. Wherein, as... Figure 2 As shown, the first horizontal positioning surface 1121 and the first mounting surface 1123 extend in directions away from each other, and both the first horizontal positioning surface 1121 and the first vertical positioning surface 1122 abut against the first positioning shaft 12. The first horizontal positioning surface 1121 is used to position the first positioning shaft 12, while the first mounting surface 1123 is used for detachably connecting the snap-fit ​​assembly 114. It is therefore easy to see that when positioning the first positioning shaft 12, as... Figure 1 and Figure 2 As shown, the first positioning shaft 12 can abut against the first horizontal positioning surface 1121 and the first vertical positioning surface 1122 respectively, and then the snap-fit ​​assembly 114 is connected to the first mounting surface 1123 of the first support base, so that the snap-fit ​​assembly 114 can engage the first positioning shaft 12 with the first horizontal positioning surface 1121 and the first vertical positioning surface 1122 respectively.

[0037] Specifically, in some embodiments, such as Figure 1 and Figure 2 As shown, the snap-fit ​​assembly 114 includes at least one snap-fit ​​member 1141 and at least one locking member 1142. The number of snap-fit ​​members 1141 and locking members 1142 are the same and uniquely correspond, and each locking member 1142 is used to lock the uniquely corresponding snap-fit ​​member 1141 to the first mounting surface 1123 of the first support base 112. As shown... Figure 2 As shown, each snap-fit ​​component 1141 also protrudes from the first vertical positioning surface 1122, so that a portion of the snap-fit ​​component 1141 is opposite to the first horizontal positioning surface 1121. Furthermore, a snap-fit ​​groove 1143 is provided on the side of the snap-fit ​​component 1141 opposite to the first horizontal positioning surface 1121, and one side wall of the groove 1143 is an inclined surface 1144 that abuts against the first positioning shaft 12. Through the abutment of the inclined surface 1144 of each snap-fit ​​component 1141 against the first positioning shaft 12, the first positioning shaft 12 can be clamped between the inclined surface 1144 of each snap-fit ​​component 1141, the first horizontal positioning surface 1121, and the first vertical positioning surface 1122, thereby achieving the positioning of the first positioning shaft 12.

[0038] In addition, such as Figure 2As shown, since the first positioning segment 121 of the first positioning shaft 12 passes through the first shaft hole 101, in order to avoid interference between the first support seat 112 and the snap-fit ​​assembly 114 when snapping the first positioning shaft 12, in some embodiments, in combination with Figure 1 As shown, the first horizontal positioning surface 1121 of the first support base 112 is also provided with a first groove 1124, and the first groove 1124 is used to receive the first end 105 of the connecting rod 10 with the first shaft hole 101. Through the first groove 1124, the connecting rod 10 can not only rotate around the axis of the first positioning shaft 12, but also avoid interference caused by the first horizontal positioning surface 1121 of the first support base 112 abutting against the first positioning shaft 12.

[0039] Finally, it is worth noting that in some other embodiments, such as Figure 2 As shown, the side of the second support 113 away from the base surface 1111 of the substrate 111 is the second horizontal positioning surface 1131, and the second horizontal positioning surface 1131 is on the same plane as the first horizontal positioning surface 1121 of the first support 112. Therefore, after the snap-fit ​​assembly 114 and the first support 112 complete the snap-fit ​​positioning of the first positioning shaft 12, by rotating the connecting rod 10, the second positioning shaft 13 can abut against the second horizontal positioning surface 1131 of the second support 113, thereby satisfying the distance detection between the first positioning shaft 12 and the second positioning shaft 13 by the vernier caliper equidistant measuring device 2. Furthermore, it should be noted that, as Figure 1 As shown, the second horizontal positioning surface 1131 of the second support base 113 is also provided with a second groove 1132, and the second groove 1132 is used to receive the second end 106 of the connecting rod 10 with the second shaft hole 102. Thus, when the second positioning shaft 13 abuts against the second horizontal positioning surface 1131 of the second support base 113, the second groove 1124 can prevent the second horizontal positioning surface 1131 from interfering with the abutment of the second positioning shaft 13.

[0040] Example 2

[0041] Embodiment 2 of the present invention relates to a link detection method, such as... Figure 6 As shown, the link detection method includes the following steps:

[0042] Step 610: A positioning fixture 1 is provided to position the connecting rod 10. The positioning fixture 1 includes a base 11, a first positioning shaft 12, and a second positioning shaft 13. When positioning the connecting rod 10, the first positioning shaft 12 and the second positioning shaft 13 are respectively inserted into the first shaft hole 101 and the second shaft hole 102 of the connecting rod 10, so that the first positioning shaft 12 and the second positioning shaft 13 are opposite to each other on the base 11, and the two ends of the first positioning shaft 12 are exposed on both sides of the first shaft hole 101, and the two ends of the second positioning shaft 13 are exposed on both sides of the second shaft hole 102.

[0043] Step 620: Measure the first distance between one end of the first positioning shaft 12 and one end of the second positioning shaft 13, and measure the second distance between the other end of the first positioning shaft 12 and the other end of the second positioning shaft 13.

[0044] Step 630: Measure whether the two end faces of the connecting rod 101 are flat along the axial direction of the first shaft hole 101 and the second shaft hole, and obtain the test results.

[0045] Step 640: Based on the measured first distance, second distance and the detection results, determine whether the processing of the connecting rod 10 is qualified and obtain the judgment result.

[0046] As can be seen from the above, by detecting the first distance between one end of the first positioning shaft 12 and one end of the second positioning shaft 13, and the second distance between the other ends of the first positioning shaft 12 and the second positioning shaft 13, and simultaneously detecting whether the two end faces of the connecting rod 10 are flat, the main control module 4 can obtain the measured first and second distances, as well as the detection results of whether the two end faces of the connecting rod 10 are flat. Based on the obtained first and second distances and the detection results, it can determine whether the machining of the connecting rod 10 is qualified and draw a judgment result. Therefore, it is clear that this detection method can not only effectively detect the coaxiality between the shaft holes of the connecting rod 10, but also effectively detect whether the two end faces of the connecting rod 10 are flat, thus saving detection costs, greatly simplifying the entire detection process, and improving detection efficiency.

[0047] Specifically, in some embodiments, step 640, which involves determining whether the processing of the connecting rod 10 is qualified based on the measured first distance, the second distance, and the detection results, specifically includes:

[0048] Calculate the distance difference between the first distance and the second distance.

[0049] If the calculated distance difference is within the threshold range, and the detection results show that both end faces are flat, then the processing of the connecting rod 10 is deemed qualified.

[0050] If the calculated distance difference is not within the threshold range, and / or if at least one of the end faces is found to be uneven, then the machining of the connecting rod 10 is deemed unqualified.

[0051] Furthermore, after determining that the machining of connecting rod 10 is unqualified, i.e. after step 640, in some embodiments, the connecting rod detection method further includes the following sub-steps:

[0052] Step 650: Generate and issue a prompt message. It should be noted that this prompt message can be a visual alarm or an audible alarm. In other embodiments, the prompt message can also represent a processing defect code or text message for the connecting rod 10.

[0053] It is not difficult to see from the above that this embodiment is an embodiment of the linkage detection method corresponding to Embodiment 1. This embodiment can be implemented in conjunction with Embodiment 1. The relevant technical details mentioned in Embodiment 1 are still valid in this embodiment. In order to reduce repetition, they will not be repeated here. Correspondingly, the relevant technical details mentioned in this embodiment can also be applied to Embodiment 1.

[0054] Those skilled in the art will understand that the above embodiments are specific implementations of the present invention, and in practical applications, various changes can be made in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A connecting rod testing device, characterized in that, The connecting rod detection device includes: A positioning fixture is used to position a connecting rod. The positioning fixture includes: a base, a first positioning shaft that can pass through a first shaft hole of the connecting rod, and a second positioning shaft that can pass through a second shaft hole of the connecting rod. When the first positioning shaft and the second positioning shaft are respectively passed through the first shaft hole and the second shaft hole, the first positioning shaft and the second positioning shaft are opposite to each other on the base, and the two ends of the first positioning shaft are respectively exposed on both sides of the first shaft hole, and the two ends of the second positioning shaft are respectively exposed on both sides of the second shaft hole. A distance measuring device is used to measure a first distance between one end of the first positioning shaft and one end of the second positioning shaft, and to measure a second distance between the other end of the first positioning shaft and the other end of the second positioning shaft; A flatness testing device is used to measure whether the two end faces of the connecting rod are flat along the axial direction of the first shaft hole and the second shaft hole, and to obtain the test result; The main control module is used to acquire the first distance and the second distance measured by the distance measuring device, and also to acquire the detection results of whether the two side planes are flat as detected by the flatness detection device, and to determine whether the processing of the connecting rod is qualified based on the acquired first distance, the second distance and the detection results, and to obtain the judgment result.

2. The connecting rod testing device according to claim 1, characterized in that, The first positioning shaft includes: a first positioning section that can be inserted into the first shaft hole, a first head measuring section and a first tail measuring section that are coaxially connected to the first positioning section, and the first head measuring section and the first tail measuring section are respectively exposed outside the first shaft hole; The second positioning shaft includes: a second positioning section that can be inserted into the second shaft hole, a second head measuring section and a second tail measuring section that are coaxially connected to the second positioning section, and the second head measuring section and the second tail measuring section are respectively exposed outside the second shaft hole; Wherein, the distance between the first head measurement segment and the second head measurement segment is the first distance, and the distance between the first tail measurement segment and the second tail measurement segment is the second distance.

3. The connecting rod testing device according to claim 2, characterized in that, The first positioning segment includes at least one first conical surface along its axial direction, and the first conical surface gradually expands from the first head measuring segment toward the first tail measuring segment; or, the first conical surface gradually expands from the first tail measuring segment toward the first head measuring segment; wherein, the first positioning segment is used to engage with the first end of the connecting rod that is provided with the first shaft hole after passing through the first shaft hole; The second positioning segment includes at least one second conical surface along its axial direction, and the second conical surface gradually expands from the second head measuring segment toward the second tail measuring segment; or, the second conical surface gradually expands from the second tail measuring segment toward the second head measuring segment; wherein, the second positioning segment is used to engage with the second end of the connecting rod that is provided with the second shaft hole after passing through the second shaft hole.

4. The connecting rod testing device according to claim 1, characterized in that, The base includes: The substrate has a base surface parallel to the horizontal plane, the base surface being used to place the flatness detection device, such that the detection surface of the flatness detection device can abut against the end faces on both sides of the connecting rod. A first support and a second support are disposed opposite to each other on the base surface; wherein, the first support is used to position the first positioning shaft, and the second support is used to position the second positioning shaft; A snap-fit ​​assembly is disposed on the side of the first support base away from the substrate, and is used to cooperate with the first support base to fix the first positioning shaft.

5. The connecting rod testing device according to claim 4, characterized in that, The side of the first support base away from the base surface includes: a first horizontal positioning surface parallel to the base surface, a first vertical positioning surface perpendicular to the first horizontal positioning surface, and a first mounting surface connected to the side of the first vertical positioning surface away from the first horizontal positioning surface; Wherein, the first horizontal positioning surface and the first mounting surface extend in directions that are far apart from each other, and the first horizontal positioning surface and the first vertical positioning surface abut against the first positioning shaft to position the first positioning shaft; The first mounting surface is used for detachably connecting the snap-fit ​​assembly.

6. The connecting rod testing device according to claim 5, characterized in that, The first horizontal positioning surface is provided with a first groove, which is used to receive the first end of the connecting rod provided with the first shaft hole, so that the connecting rod can rotate around the axis of the first positioning shaft.

7. The connecting rod testing device according to claim 5, characterized in that, The snap-fit ​​assembly includes: at least one snap-fit ​​member and at least one locking member; wherein the number of snap-fit ​​members and the number of locking members are the same and they correspond uniquely, and each locking member is used to lock the uniquely corresponding snap-fit ​​member to the first mounting surface of the first support base; Each of the snap-fit ​​components protrudes from the first vertical positioning surface, such that a portion of the snap-fit ​​component is opposite to the first horizontal positioning surface. Furthermore, a slot is provided on one side of the snap-fit ​​component relative to the first horizontal positioning surface, and one side wall of the slot is an inclined surface that abuts against the first positioning shaft.

8. The connecting rod testing device according to claim 5, characterized in that, The side of the second support base away from the base surface is the second horizontal positioning surface, and the second horizontal positioning surface and the first horizontal positioning surface are on the same plane; The second horizontal positioning surface is provided with a second groove, which is used to receive the second end of the connecting rod provided with the second shaft hole.

9. A method for detecting a connecting rod, characterized in that, The link detection method includes the following steps: A positioning fixture is provided for positioning a connecting rod; wherein the positioning fixture includes: a base, a first positioning shaft and a second positioning shaft. When positioning the connecting rod, the first positioning shaft and the second positioning shaft are respectively inserted into the first shaft hole and the second shaft hole of the connecting rod, so that the first positioning shaft and the second positioning shaft are opposite to each other on the base, and the two ends of the first positioning shaft are respectively exposed on both sides of the first shaft hole, and the two ends of the second positioning shaft are respectively exposed on both sides of the second shaft hole. Measure a first distance between one end of the first positioning shaft and one end of the second positioning shaft, and measure a second distance between the other end of the first positioning shaft and the other end of the second positioning shaft; Along the axial direction of the first shaft hole and the second shaft hole, check whether the two end faces of the connecting rod are flat and obtain the test results; Based on the measured first distance, the second distance, and the detection results, it is determined whether the processing of the connecting rod is qualified, and a judgment result is obtained.

10. The link detection method according to claim 9, characterized in that, The step of determining whether the processing of the connecting rod is qualified based on the measured first distance, the second distance, and the detection result specifically includes: Calculate the distance difference between the first distance and the second distance; If the calculated distance difference is within the threshold range, and the detection result shows that both end faces are flat, then the processing of the connecting rod is deemed qualified. If the calculated distance difference is not within the threshold range, and / or if at least one of the end faces is found to be uneven, then the connecting rod is deemed to be unqualified in processing.

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