Connecting rod detection device

Abstract

The present invention relates to the technical field of connecting rod detection tooling, and discloses a connecting rod detection device, including a mounting platform, a clamping device, two sets of inner hole detection devices and two base plates, the inner hole detection device includes a positioning mandrel and a detection component, the detection component includes a quadrilateral flexure gauge, a measuring rod fixed on the top of the quadrilateral flexure gauge, a measuring head is installed on the measuring rod, a mounting groove matching the measuring rod is provided on the side wall of the positioning mandrel, the quadrilateral flexure gauge is slidably installed on the base plate slide rail of the base plate through a slider, the quadrilateral flexure gauge is installed on the slider through a mounting block, the inner hole detection device also includes a top cone fixed on the base plate, one end of the top cone is connected to the base plate, the other end of the top cone is truncated, the surface where the mounting block abuts against the top cone is an inclined surface, and a top cone is provided at the bottom of the top cone to adjust the installation height of the top cone. The connecting rod detection device using the technical solution of the present invention has a simple structure, high detection accuracy, and can be applied to the detection of connecting rods of various specifications.

Description

Technical Field

[0001] The invention relates to the technical field of connecting rod detection tooling, and in particular to a connecting rod detection device. Background Art

[0002] At present, the existing connecting rod final inspection machines on the market are often tailored for a certain model or two or three models of connecting rods. If the connecting rod of this model is withdrawn from the market, the final inspection machine will be forced to be idle due to incompatibility with new products, or a large amount of cost will be invested in upgrading and transformation. At the same time, the detection results of the existing connecting rod final inspection machines have large deviations and cannot meet the precision requirements of the connecting rod when transmitting motion. Summary of the invention

[0003] The object of the present invention is to provide a connecting rod detection device, which has a simple structure, high detection accuracy, and can be applied to the detection of connecting rods of various specifications.

[0004] In order to achieve the above-mentioned purpose, the present invention provides a connecting rod detection device including a mounting platform, a clamping device located above the mounting platform for clamping the connecting rod, two groups of inner hole detection devices installed on the mounting platform, and two base plates located below the mounting platform for installing the inner hole detection devices, the inner hole detection device including a positioning mandrel and a detection component arranged around the periphery of the positioning mandrel, the detection component including a quadrilateral flexure gauge, a measuring rod fixed on the top of the quadrilateral flexure gauge, a measuring head installed on the measuring rod, a mounting groove matching the measuring rod is provided on the side wall of the positioning mandrel, and the size of the mounting groove is larger than the size of the measuring rod; the quadrilateral flexure gauge is slidably installed on the base plate slide rail of the base plate through a slider, the quadrilateral flexure gauge is installed on the slider through a mounting block, the inner hole detection device also includes a top cone fixed on the base plate, one end of the top cone is connected to the base plate, the other end of the top cone is truncated, the surface of the mounting block abutting against the top cone is an inclined surface, and the bottom of the top cone is provided with a pin for adjusting the mounting height of the top cone.

[0005] Preferably, at least one of the two groups of inner hole detection devices is slidably mounted on the mounting platform, and a center distance adjustment device is provided on the mounting platform on the other side of the inner hole detection device slidably mounted on the mounting platform away from the adjacent side of the two groups of inner hole detection devices.

[0006] Preferably, each of the mounting grooves is provided with a first quadrilateral flexible gauge and a second quadrilateral flexible gauge, the first quadrilateral flexible gauge and the second quadrilateral flexible gauge have the same structure, but the length of the measuring rod connected to the first quadrilateral flexible gauge is greater than the length of the measuring rod connected to the second quadrilateral flexible gauge, the measuring rod of the first quadrilateral flexible gauge is provided with a first measuring rod probe mounting portion for mounting a first probe, an open groove is provided below the first measuring rod probe mounting portion, the top end of the measuring rod of the second quadrilateral flexible gauge is provided with a second measuring rod probe mounting portion for mounting a second probe, the second measuring rod probe mounting portion is installed in the open groove, and the first probe and the second probe are located in the same vertical plane.

[0007] Preferably, the first quadrilateral flexure gauge and the second quadrilateral flexure gauge both include a sensor, a micro cylinder, a movable frame, a fixed frame, a first spring sheet and a second spring sheet, the movable frame and the fixed frame are connected via the first spring sheet and the second spring sheet, a measuring rod is connected to the top of the movable frame, the movable frame, the fixed frame, the first spring sheet and the second spring sheet are provided with holes for the sensor and the micro cylinder to pass through, a spring is provided between the movable frame and the fixed frame, and the micro cylinder can drive the movable frame to reciprocate along the radial direction of the positioning core shaft.

[0008] Preferably, a compression spring hole is provided on a side of the mounting block away from the top cone, a spring fixing seat is provided on a side of the substrate slide rail away from the top cone, and a compression spring is provided between the spring fixing seat and the compression spring hole.

[0009] Preferably, two supporting plates are provided on the mounting platform, the lower surface of the supporting plate is connected to the mounting platform, the positioning core shaft is fixedly connected to the upper surface of the supporting plate, and a through hole for the inner hole detection device to pass through is provided in the middle of the supporting plate.

[0010] Preferably, it also includes a lifting assembly, which is installed above the supporting plate, and the clamping device includes a guide rail arranged in the vertical direction and a clamping head slidably connected to the guide rail, and the clamping head is connected to the clamping cylinder; the lifting assembly includes a lifting support plate matching the shape of the connecting rod and a sliding seat plate connected to the lifting support plate, the sliding seat plate is connected to the guide rail through a slider seat, and the lifting support plate is connected to the lifting power device.

[0011] Preferably, a plurality of support adjustment blocks are installed on the upper surface of the support plate, and the adjustment block includes a support block and a support rod. The lifting support plate is arranged on the top of the support block, and the lifting support plate is provided with a through hole for the support rod to pass through.

[0012] Preferably, the center distance adjustment device includes an adjusting screw seat, a center distance adjustment screw and a block seat, the adjusting screw seat is installed on the upper surface of the mounting platform, an adjusting seat is provided at a position of the support plate opposite to the center distance adjustment screw, a thread matching the center distance adjustment screw is provided in the adjusting seat, a block fine-tuning screw is provided in the block seat, one end of the block fine-tuning screw is threadedly connected to the block seat, and the other end of the block fine-tuning screw abuts against the side wall of the support plate.

[0013] Preferably, it also includes a thickness detection sensor installed on the supporting plate, and the thickness detection sensor is installed on the upper surface of the supporting plate.

[0014] The connecting rod detection device according to the embodiment of the present invention has the following beneficial effects compared with the prior art:

[0015] In the connecting rod detection device of the embodiment of the present invention, a measuring rod is provided at the top end of the quadrilateral flexure gauge, a measuring head is provided on the measuring rod, and a top cone is provided on the base plate. The quadrilateral flexure gauge is abutted against the top cone via a mounting block, and the height of the top cone can be adjusted by a pin arranged at the bottom of the base plate for adjusting the mounting height of the top cone. Since the inclined surface of the mounting block abuts against the inclined surface of the top cone, and the mounting block is slidably installed on the base plate, the distance between the two sets of quadrilateral flexure gauges can be adjusted by adjusting the height of the top cone, so that the connecting rod detection device of the present invention is suitable for connecting rods with various inner hole diameters. Furthermore, by arranging a mounting groove on the positioning core shaft, the contact between the measuring head on the measuring rod and the inner hole of the connecting rod is avoided, and the damage to the inner hole of the connecting rod by the measuring head is avoided. At the same time, the corresponding data of the inner hole of the connecting rod is detected by using the quadrilateral flexure gauge, which has smaller deviation than the traditional detection device and is easier to ensure the accuracy of the connecting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a device for detecting a connecting rod in the prior art;

[0017] Figure 2 yes Figure 1 A simple diagram of the movement;

[0018] Figure 3 is a schematic structural diagram of a connecting rod detection device according to an embodiment of the present invention;

[0019] Figure 4 is a schematic structural diagram of an inner hole detection device according to an embodiment of the present invention;

[0020] Figure 5 is a schematic structural diagram of a quadrilateral flexure gauge according to an embodiment of the present invention;

[0021] Figure 6 yes Figure 5 A simple diagram of the movement;

[0022] Figure 7is a front view of a connecting rod detection device according to an embodiment of the present invention;

[0023] In the figure, 1, electromagnetic sensor, 2, probe, 3, tension spring, 4, single group deformation spring; 100, mounting platform, 110, precision guide rail, 200, center distance adjustment device, 210, adjustment screw seat, 220, center distance adjustment screw, 230, pad seat, 240, adjustment seat, 250, pad fine-tuning screw, 300, support plate, 310, first support plate, 320, second support plate, 400, thickness detection sensor, 500, clamping device, 510, clamping head, 520, clamping cylinder, 600, large head inner hole detection device, 610, positioning mandrel, 620, measuring rod, 621, first measuring rod, 622, second Measuring rod, 630, mounting block, 640, compression spring, 650, locking screw, 660, base plate, 661, spring fixing seat, 662, slider, 663, top cone, 664, ejector, 670, quadrilateral flexible gauge, 671, sensor, 672, micro cylinder, 673, moving frame, 674, fixed frame, 675, first spring piece, 676, second spring piece, 677, spring, 680, connecting shaft, 690, support adjustment block, 691, support block, 692, support rod, 700, small head inner hole detection device, 800, lifting assembly, 810, lifting support plate, 820, slider seat, 830, lifting power device. DETAILED DESCRIPTION

[0024] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention.

[0025] It should be understood that the present invention uses the terms "first", "second", etc. to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0026] like Figure 1 As shown, the numerical transmission mechanism of the connecting rod detection device commonly used in the prior art is usually pulled from the inside to the outside by the tension spring 3. When the probe 2 contacts the inner hole of the connecting rod, the force point is forced to be squeezed backward, the single group of deformation springs 4 is deformed, and the inductive sensor 1 reads the current deformation amount. Figure 1 After simplification, the motion principle relationship is obtained as follows Figure 2As shown in the figure, when the C point (probe 2) of the mechanism contacts the surface of the workpiece, it will move around the O point (the thinnest point of the deformed spring) to the D point. When it moves to D, the measurement value of the electromagnetic sensor 1 also moves from the A point to the B point. If the vertical distance CD is the actual change of the workpiece, the actual variation of the electromagnetic sensor 1 is only AB at this time. Obviously, AB cannot represent the actual variation of the workpiece, so it can only be repaired by trigonometric functions. However, due to the error of the workpiece, the angle of ∠AOB must be reduced as much as possible so that the converted CD length can be infinitely close to the length of AB.

[0027] Therefore, in order to ensure the measurement accuracy, the prior art must reduce the range of the electromagnetic sensor 1 and reduce the adjustment range as much as possible. Therefore, almost all connecting rod final inspection machines on the market use electromagnetic sensors 1 with a range of 0.5mm. The smaller the range, the better the accuracy is controlled, but it also makes it almost impossible to change the type of equipment, because the value transmission mechanism of the electromagnetic sensor 1 can only extend into the connecting rod hole to measure the data. Then, the longer the measuring rod 620 is extended, the higher the processing requirements for the base. When adjusting, the operator often sees that the software shows that the pre-load value of the electromagnetic sensor 1 is moderate. Once the value transmission mechanism is locked, the electromagnetic sensor 1 is either pressed to death at full range or does not contact the workpiece, resulting in erroneous measurement results. In the same measuring hole, 8 groups of electromagnetic sensors 1 need to be distributed. It is extremely difficult to make them reach a moderate pre-load value at the same time. At the same time, almost all final inspection machines on the market use the inner wall of the connecting rod's large and small holes to squeeze the electromagnetic sensor 1 to obtain the value during the process of the connecting rod falling to the guide tooling. If the spring force of the electromagnetic sensor 1 is too weak, it will affect the value tracking of the electromagnetic sensor 1. Therefore, in order to solve this problem, the spring force of the electromagnetic sensor 1 has to be increased. However, because the spring force of the electromagnetic sensor 1 is too large, the probe 2 of the electromagnetic sensor 1 will inevitably scratch the inner wall of the connecting rod during the falling process of the connecting rod; in order to avoid the influence of equipment vibration on the measurement data, the existing final inspection machines all use bolts to directly lock the electromagnetic sensor 1 and the measurement base to form a hard connection. Although this can ensure accuracy, it makes it impossible to flexibly adjust the equipment, and it is necessary to customize a variety of connecting rod final inspection machines according to the types of both sides.

[0028] like Figures 3 to 6As shown, a connecting rod detection device of a preferred embodiment of the present invention includes a mounting platform 100, a clamping device 500 located above the mounting platform 100 for clamping the connecting rod, two groups of inner hole detection devices installed on the mounting platform 100, and two substrates 660 located below the mounting platform 100 for installing the inner hole detection devices. In this embodiment, the two groups of inner hole detection devices are arranged along the length direction of the mounting platform 100, and the inner hole detection device includes a positioning core shaft 610 and a detection component arranged around the periphery of the positioning core shaft 610. In this embodiment, the positioning core shaft 610 is clearance-matched with the connecting rod, the number of the detection components is 4, and the detection components are evenly distributed around the periphery of the positioning core shaft 610. The detection assembly includes a quadrilateral flexible gauge 670, a measuring rod 620 fixed on the top of the quadrilateral flexible gauge 670, a measuring head 2 is installed on the measuring rod 620, and a mounting groove matching the measuring rod 620 is provided on the side wall of the positioning mandrel 610, and the size of the mounting groove is larger than the size of the measuring rod 620; thus, it is convenient to store the measuring rod 620 before the detection starts to avoid scratching the inner hole of the connecting rod. The quadrilateral flexible gauge 670 is slidably installed on the base plate 660 slide rail of the base plate 660 through the slider 662, and the quadrilateral flexible gauge 670 is installed on the slider 662 through the mounting block 630. The inner hole detection The device also includes a top cone 663 fixed on the base plate 660, one end of the top cone 663 is connected to the base plate 660, and the other end of the top cone 663 is truncated, the surface of the mounting block 630 abutting against the top cone 663 is an inclined surface, and the bottom of the top cone 663 is provided with a top pin 664 for adjusting the installation height of the top cone 663, thereby adjusting the abutment position of the top cone 663 and the mounting block 630 by adjusting the top pin 664, so that the relative quadrilateral flexure gauge 670 is at different intervals, thereby adjusting the interval between the two relative measuring rods 620 to adapt to connecting rods with different sizes of inner diameters. When using the quadrilateral flexure gauge 670 for detection, when the force point (probe 2) contacts the inner wall of the connecting rod hole, the parallelogram formed by the quadrilateral flexure gauge 670 will change, and the horizontal change amount of the force point (probe 2) is equal to the horizontal change amount of the quadrilateral flexure gauge 670. The variation produced by the horizontal force point (the highest point in the figure) is the same as the horizontal variation of the parallelogram below. This numerical transmission, combined with the deviation correction of the standard parts, results in almost no loss of linear accuracy.

[0029] Based on the above technical solution, a measuring rod 620 is provided at the top of the quadrilateral flexible gauge 670, a measuring head 2 is provided on the measuring rod 620, a top cone 663 is provided on the substrate 660, the quadrilateral flexible gauge 670 is in contact with the top cone 663 through the mounting block 630, and the height of the top cone 663 can be adjusted by the ejector pin 664 arranged at the bottom of the substrate 660 for adjusting the mounting height of the top cone 663. Since the inclined surface of the mounting block 630 is in contact with the inclined surface of the top cone 663, and the mounting block 630 is slidably mounted on the substrate 660, Adjusting the height of the top cone 663 can adjust the distance between the two sets of quadrilateral flexible gauges 670, so that the connecting rod detection device of the present invention is suitable for connecting rods with various inner hole diameters. Furthermore, by providing a mounting groove on the positioning core shaft 610, the contact between the probe 2 on the measuring rod 620 and the inner hole of the connecting rod is avoided, thereby avoiding damage to the inner hole of the connecting rod by the probe 2. At the same time, the corresponding data of the inner hole of the connecting rod is detected by the quadrilateral flexible gauge 670, which has smaller deviation than the traditional detection device and is easier to ensure the accuracy of the connecting rod.

[0030] Further, at least one of the two groups of inner hole detection devices is slidably mounted on the mounting platform 100, and a center distance adjustment device 200 is provided on the mounting platform 100 on the other side of the inner hole detection device slidably mounted on the mounting platform 100 away from the adjacent side of the two groups of inner hole detection devices. This can adapt to the detection of connecting rods with different center distances. The two groups of inner hole detection devices are marked as large-head inner hole detection devices 600 and small-head inner hole detection devices 700, respectively. In this embodiment, the small-head inner hole detection device 700 is slidably mounted on the mounting platform 100, and the center distance adjustment device 200 is mounted on the mounting platform 100 on the side of the small-head inner hole detection device 700 away from the large-head inner hole detection device 600.

[0031] Preferably, each installation groove is provided with a first quadrilateral flexible gauge 670 and a second quadrilateral flexible gauge 670, the first quadrilateral flexible gauge 670 and the second quadrilateral flexible gauge 670 have the same structure, but the length of the measuring rod 620 connected to the first quadrilateral flexible gauge 670 is greater than the length of the measuring rod 620 connected to the second quadrilateral flexible gauge 670, the measuring rod 620 of the first quadrilateral flexible gauge 670 is provided with a first measuring rod 621 measuring head 2 installation part for installing the first measuring head 2, the lower part of the first measuring rod 621 measuring head 2 installation part is provided with an open groove, the top of the measuring rod 620 of the second quadrilateral flexible gauge 670 is provided with a second measuring rod 622 measuring head 2 installation part for installing the second measuring head 2, the second measuring rod 622 measuring head 2 installation part is installed in the open groove, and the first measuring head 2 and the second measuring head 2 are located in the same vertical plane. This facilitates the detection of other parameters such as the verticality of the inner hole of the connecting rod.

[0032] Among them, the first quadrilateral flexible gauge 670 and the second quadrilateral flexible gauge 670 both include a sensor 671, a micro cylinder 672, a movable frame 673, a fixed frame 674, a first spring clip 675 and a second spring clip 676. The movable frame 673 and the fixed frame 674 are connected by the first spring clip 675 and the second spring clip 676. The top of the movable frame 673 is connected with a measuring rod 620. The movable frame 673, the fixed frame 674, the first spring clip 675 and the second spring clip 676 are provided with holes for the sensor 671 and the micro cylinder 672 to pass through. A spring 677 is provided between the movable frame 673 and the fixed frame 674. The micro cylinder 672 can drive the movable frame 673 to reciprocate along the radial direction of the positioning core shaft 610. Therefore, the micro cylinder 672 can drive the measuring rod 620 to move along the radial direction of the positioning core shaft 610 toward the axial direction of the positioning core shaft 610, thereby avoiding the friction between the probe 2 on the measuring rod 620 and the inner hole of the connecting rod during the falling process of the connecting rod. When the micro cylinder 672 stops working, the spring between the movable frame 673 and the fixed frame 674 drives the measuring rod 620 to move toward the side wall of the inner hole of the connecting rod, thereby completing the measurement.

[0033] In this embodiment, a hole for the compression spring 640 is provided on the side of the mounting block 630 away from the top cone 663, a spring fixing seat 661 is provided on the side of the slide rail of the base plate 660 away from the top cone 663, and a compression spring 640 is provided between the spring fixing seat 661 and the hole for the compression spring 640. Thus, the movement of the mounting block 630 is limited, and the compression spring 640 and the top cone 663 work together to limit the position of the mounting block 630. The compression spring 640 is fixed between the spring fixing seat 661 and the hole for the compression spring 640 by a locking screw 650. The locking screw 650 limits the mounting block 630 and plays a guiding role similar to a spring rod for the compression spring 640, so as to prevent the compression spring 640 from bending during the movement of the mounting block 630 and popping out of the spring hole to cause personal injury.

[0034] Preferably, two supporting plates 300 are provided on the mounting platform 100, the lower surface of the supporting plate 300 is connected to the mounting platform 100, the positioning mandrel 610 is fixedly connected to the upper surface of the supporting plate 300, and a through hole is provided in the middle of the supporting plate 300 for the inner hole detection device to pass through. This facilitates the disassembly and installation of the inner hole detection device, and also facilitates the sliding of the detection device on the mounting platform 100. In this embodiment, the supporting plate 300 includes a first supporting plate 310 and a second supporting plate 320, a slide seat is provided at the bottom of the second supporting plate 320, and a precision guide rail 110 corresponding to the slide seat is provided on the mounting platform 100, thereby facilitating the movement of the second supporting plate 320.

[0035] In addition, it also includes a lifting assembly 800, which is installed above the supporting plate 300. The clamping device includes a guide rail arranged in the vertical direction and a clamping head 510 slidably connected to the guide rail, and the clamping head 510 is connected to the clamping cylinder 520. The lifting assembly 800 includes a lifting support plate 810 matching the shape of the connecting rod and a sliding seat plate connected to the lifting support plate 810. The sliding seat plate is connected to the guide rail through a slider seat 820, and the lifting support plate 810 is connected to a lifting power device 830. This makes it easy to take out the connecting rod after detection and also makes it easy to place the connecting rod before detection.

[0036] Specifically, a plurality of support adjustment blocks 690 are installed on the upper surface of the support plate 300, and the adjustment blocks include a support block 691 and a support rod 692. A lifting support plate 810 is arranged on the top of the support block 691. A through hole is provided on the lifting support plate 810 for the support rod 692 to pass through. The bottom of the support rod 692 is connected to the support block 691, and the top of the support rod 692 is in contact with the connecting rod. This facilitates the adjustment of the position and height of the lifting support plate 810. Furthermore, the support rod 692 has high processing accuracy, ensuring that the planes of the bottom and side surfaces of the connecting rod are in the same plane when the connecting rod is detected.

[0037] In this embodiment, the center distance adjustment device 200 includes an adjustment screw seat 210, a center distance adjustment screw 220 and a pad seat 230. The adjustment screw seat 210 is installed on the upper surface of the mounting platform 100. An adjustment seat 240 is provided at a position of the support plate 300 opposite to the center distance adjustment screw. A thread matching the center distance adjustment screw 220 is provided in the adjustment seat 240. A pad fine-tuning screw 250 is provided in the pad seat 230. One end of the pad fine-tuning screw 250 is threadedly connected to the pad seat 230, and the other end of the pad fine-tuning screw 250 abuts against the side wall of the support plate 300. In this way, the freedom of movement of the support plate 300 in all directions is limited, the support plate 300 is locked, and the detection is convenient while ensuring the accuracy of the detection.

[0038] Preferably, a thickness detection sensor 400 is further included which is installed on the supporting plate 300, and a thickness detection sensor 671 is installed on the upper surface of the supporting plate 300. In this way, it can be detected whether the thickness of the connecting rod meets the standard.

[0039] In this embodiment, the base plate 660 is connected to the support plate 300 via the connecting shaft 680. The top cone 663 is fixedly connected to the upper end surface of the aperture adjustment guide through the taper locking block, and the ejector pin 664 is installed on the lower end surface of the aperture adjustment guide through the ejector pin 664 mounting plate.

[0040] In this embodiment, a controller and a sensor 671 for detecting the positional relationship between the connecting rod and the support rod 692 are also included. The pressing cylinder 520, the micro cylinder 672 and the positional relationship sensor 671 are all electrically connected to the controller. Before the connecting rod and the support rod 692 come into contact, the micro cylinder 672 drives the measuring rod 620 to move along the radial direction of the positioning mandrel 610 toward the axial direction of the positioning mandrel 610. When the position sensor 671 detects that the connecting rod and the support rod 692 are in contact, the micro cylinder 672 stops working, and a spring is provided between the moving frame 673 and the fixed frame 674 to drive the measuring rod 620 to move toward the side wall of the inner hole of the connecting rod, thereby completing the measurement. This avoids the friction between the probe 2 on the measuring rod 620 and the inner hole of the connecting rod during the process of the connecting rod falling in, and avoids damage to the inner hole of the connecting rod.

[0041] The working process of the present invention is as follows: the connecting rod is placed on the lifting support plate 810, and the connecting rod falls onto the installation platform 100 along the two sets of positioning mandrels 610. Before the connecting rod contacts the support rod 692, the micro cylinder 672 drives the measuring rod 620 to move along the radial direction of the positioning mandrel 610 toward the axial direction of the positioning mandrel 610. When the position sensor 671 detects that the connecting rod abuts against the support rod 692, the micro cylinder 672 stops working, and the shaking of the connecting rod is limited by the clamping device 500. The spring between the movable frame 673 and the fixed frame 674 drives the measuring rod 620 to move toward the side wall of the inner hole of the connecting rod, thereby completing the measurement. This avoids the friction between the probe 2 on the measuring rod 620 and the inner hole of the connecting rod during the process of the connecting rod falling, and avoids damage to the inner hole of the connecting rod. When it is necessary to detect connecting rods with different inner diameters, the adjusting pin 664 adjusts the contact position of the top cone 663 and the mounting block 630, so that the relative quadrilateral flexible gauge 670 is at different spacings, thereby adjusting the spacing between the two relative measuring rods 620 to adapt to connecting rods with different inner diameters. When it is necessary to detect connecting rods with different center distances, it is only necessary to rotate the center distance adjustment screw 220 to realize the horizontal left and right movement of the small head inner hole detection device 700, and cooperate with the fixed position of the large head inner hole detection device 600 to achieve the product measurement requirements of different main distances in the hole. In order to achieve fast switching, a set of cushion block seats 230 can be processed for different models of products. When it is necessary to adjust the center distance, rotate the center distance adjustment screw 220, loosen the cushion block seat 230, and then replace the cushion block seat 230 of the new product, rotate the center distance adjustment screw 220, make the small head inner hole detection device 700 close to the cushion block seat 230, and lock the center distance adjustment device 200.

[0042] In summary, the embodiment of the present invention provides a connecting rod detection device, wherein a measuring rod 620 is provided at the top of a quadrilateral flexible gauge 670 of the connecting rod detection device, a measuring head 2 is provided on the measuring rod 620, a top cone 663 is provided on a base plate 660, the quadrilateral flexible gauge 670 is in contact with the top cone 663 through a mounting block 630, and the height of the top cone 663 can be adjusted by a pin 664 arranged at the bottom of the base plate 660 for adjusting the mounting height of the top cone 663, because the inclined surface of the mounting block 630 is in contact with the inclined surface of the top cone 663, and the mounting block 630 is slidably mounted on the top cone 663. On the base plate 660, the distance between the two sets of quadrilateral flexible gauges 670 can be adjusted by adjusting the height of the top cone 663, so that the connecting rod detection device of the present invention is suitable for connecting rods with various inner hole diameters. Furthermore, by providing a mounting groove on the positioning core shaft 610, the contact between the probe 2 on the measuring rod 620 and the inner hole of the connecting rod is avoided, thereby avoiding damage to the inner hole of the connecting rod by the probe 2. At the same time, the corresponding data of the inner hole of the connecting rod is detected by the quadrilateral flexible gauge 670, which has smaller deviation than the traditional detection device and is easier to ensure the accuracy of the connecting rod.

[0043] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “top” and “bottom” are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A connecting rod detection device, characterized in that: It comprises a mounting platform, a clamping device located above the mounting platform for clamping a connecting rod, two sets of inner hole detection devices mounted on the mounting platform, and two base plates located below the mounting platform for mounting the inner hole detection devices, the inner hole detection device comprises a positioning mandrel and a detection component arranged around the periphery of the positioning mandrel, the detection component comprises a quadrilateral flexure gauge, a measuring rod fixed on the top of the quadrilateral flexure gauge, a measuring head is mounted on the measuring rod, a mounting groove matching the measuring rod is provided on the side wall of the positioning mandrel, and the size of the mounting groove is larger than the size of the measuring rod; The quadrilateral flexure gauge is slidably mounted on the substrate slide rail of the substrate via a slider, and the quadrilateral flexure gauge is mounted on the slider via a mounting block. The inner hole detection device also includes a top cone fixed on the substrate, one end of the top cone is connected to the substrate, and the other end of the top cone is frustum-shaped. The surface of the mounting block abutting against the top cone is an inclined surface, and a top pin for adjusting the mounting height of the top cone is provided at the bottom of the top cone.

2. The connecting rod detection device according to claim 1, characterized in that: At least one of the two groups of inner hole detection devices is slidably mounted on the mounting platform, and a center distance adjustment device is provided on the mounting platform on the other side of the inner hole detection device slidably mounted on the mounting platform away from the adjacent side of the two groups of inner hole detection devices.

3. The connecting rod detection device according to claim 2, characterized in that: A first quadrilateral flexible gauge and a second quadrilateral flexible gauge are provided in each of the installation grooves. The first quadrilateral flexible gauge and the second quadrilateral flexible gauge have the same structure, but the length of the measuring rod connected to the first quadrilateral flexible gauge is greater than the length of the measuring rod connected to the second quadrilateral flexible gauge. The measuring rod of the first quadrilateral flexible gauge is provided with a first measuring rod probe mounting portion for mounting a first probe, and an open groove is provided below the first measuring rod probe mounting portion. The top end of the measuring rod of the second quadrilateral flexible gauge is provided with a second measuring rod probe mounting portion for mounting a second probe, and the second measuring rod probe mounting portion is installed in the open groove. The first probe and the second probe are located in the same vertical plane.

4. The connecting rod detection device according to claim 3, characterized in that: The first quadrilateral flexure gauge and the second quadrilateral flexure gauge both include a sensor, a micro cylinder, a movable frame, a fixed frame, a first spring sheet and a second spring sheet. The movable frame and the fixed frame are connected via the first spring sheet and the second spring sheet. A measuring rod is connected to the top of the movable frame. The movable frame, the fixed frame, the first spring sheet and the second spring sheet are provided with holes for the sensor and the micro cylinder to pass through. A spring is provided between the movable frame and the fixed frame. The micro cylinder can drive the movable frame to reciprocate along the radial direction of the positioning core shaft.

5. The connecting rod detection device according to claim 1, characterized in that: A compression spring hole is provided on a side of the mounting block away from the top cone, a spring fixing seat is provided on a side of the base slide rail away from the top cone, and a compression spring is provided between the spring fixing seat and the compression spring hole.

6. The connecting rod detection device according to claim 3, characterized in that: Two supporting plates are arranged on the installation platform, the lower surface of the supporting plate is connected to the installation platform, the positioning core shaft is fixedly connected to the upper surface of the supporting plate, and a through hole for the inner hole detection device to pass through is arranged in the middle of the supporting plate.

7. The connecting rod detection device according to claim 6, characterized in that: It also includes a lifting assembly, which is installed above the supporting plate. The clamping device includes a guide rail arranged in a vertical direction and a clamping head slidably connected to the guide rail, and the clamping head is connected to a clamping cylinder; The lifting assembly comprises a lifting support plate matched with the shape of the connecting rod and a sliding seat plate connected to the lifting support plate. The sliding seat plate is connected to the guide rail through a sliding block seat, and the lifting support plate is connected to a lifting power device.

8. The connecting rod detection device according to claim 7, characterized in that: A plurality of support adjustment blocks are installed on the upper surface of the support plate, wherein the adjustment block comprises a support block and a support rod. The lifting support plate is arranged on the top of the support block, and a through hole is provided on the lifting support plate for the support rod to pass through.

9. The connecting rod detection device according to claim 8, characterized in that: The center distance adjustment device includes an adjusting screw seat, a center distance adjustment screw and a block seat, the adjusting screw seat is installed on the upper surface of the mounting platform, an adjusting seat is provided at a position of the supporting plate opposite to the center distance adjustment screw, a thread matching the center distance adjustment screw is provided in the adjusting seat, a block fine-tuning screw is provided in the block seat, one end of the block fine-tuning screw is threadedly connected to the block seat, and the other end of the block fine-tuning screw abuts against the side wall of the supporting plate.

10. The connecting rod detection device according to claim 6, characterized in that: It also includes a thickness detection sensor installed on the supporting plate, and the thickness detection sensor is installed on the upper surface of the supporting plate.

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