A delivery apparatus and method capable of detecting surface defects of a piston rod

Abstract

The application discloses a conveying device and method capable of detecting surface defects of a piston rod, relates to the field of piston rod surface defect detection, and comprises a frame body. Upper feeding assemblies and lower feeding assemblies are arranged at the two ends of the frame body. A conveying assembly is arranged at the middle position of the upper feeding assemblies and the lower feeding assemblies. The conveying assembly comprises a rotating disc. A plurality of placing stations are arranged on the rotating disc. A driven gear is fixedly installed at the bottom of each placing station through a fixing rod. When conveying, a workpiece is placed on the upper feeding conveying belt on one side of the upper feeding assembly. The position of the two grooves in the sliding frame is adjusted through a driving device. Two groups of clamping air cylinders are lifted upward through the lifting air cylinder in the upper feeding assembly. The corresponding lifting air cylinders are controlled to rotate through a rotating controller. The position of the two groups of clamping air cylinders is interchanged through the rotating air cylinder at the bottom of the lifting air cylinder. The clamped workpiece is placed into the placing station on the rotating disc, and the conveying of the workpiece is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of piston rod surface defect detection, in particular to a conveying device and method capable of detecting piston rod surface defects. BACKGROUND

[0002] The piston rod, as the name implies, is a connecting component that supports the piston to work, and is mostly applied in the motion execution component of the oil cylinder and the air cylinder, and is a motion component with frequent motion and high technical requirements. Taking the hydraulic oil cylinder as an example, it is composed of a cylinder barrel, a piston rod (oil cylinder rod), a piston and an end cover. The machining quality directly affects the service life and reliability of the entire product. The piston rod has high machining requirements, and the surface roughness requirement is Ra 0.4-0.8 um, and the coaxiality and wear resistance are strictly required. The basic feature of the oil cylinder rod is the machining of a slender shaft, which is difficult to machine and has been a problem for machining personnel.

[0003] Chinese Patent No. CN 110813818 B discloses a piston rod surface defect detection system, which comprises a feeding mechanism, a conveying mechanism, a cleaning mechanism, a drying mechanism, an image acquisition mechanism, a sorting mechanism and a control module. The feeding mechanism sends the piston rod into the conveying mechanism, the conveying mechanism conveys the piston rod from left to right to the sorting mechanism, the cleaning device cleans the contaminants on the surface of the piston rod passing below, the drying device dries the piston rod passing below, the image acquisition mechanism acquires the image of the piston rod conveyed to the sorting mechanism and sends it to the control module, the control module is installed with an image processing program, and the image processing program processes the image of the piston rod to obtain a judgment conclusion of whether the piston rod has defects.

[0004] The piston rod in the above patent is photographed by a CCD camera and uploaded to a gallery for image comparison to observe whether there is a defect on the surface of the piston rod. The device has few detection parameters for the piston rod, cannot detect the coaxiality of the piston rod, and the feeding and unloading are very cumbersome. SUMMARY

[0005] The present application aims to provide a conveying device and method capable of detecting piston rod surface defects, which can automatically feed and unload the piston rod, detect the coaxiality of the piston rod while detecting the appearance defects of the piston rod, so as to solve the technical problems of the prior art that the coaxiality of the workpiece cannot be quickly and effectively detected when the coaxiality of the workpiece is detected, the detection effect cannot be achieved when the detection is performed, and the coaxiality of the workpiece cannot be efficiently detected when the detection is performed.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0007] A conveying device capable of detecting surface defects of a piston rod: comprising a frame; the frame is respectively provided with an upper feeding assembly and a lower feeding assembly at both ends; the upper feeding assembly and the lower feeding assembly are provided with a conveying assembly at the middle position; the conveying assembly comprises a rotating disc; a plurality of placement stations are arranged on the rotating disc; a driven gear is fixedly installed at the bottom of the plurality of placement stations through a fixed rod; the workpiece conveyed by the upper feeding assembly is rotated to one side of the detection assembly through the rotating disc, so that the transmission and detection of the workpiece can be operated at the same time;

[0008] As a further technical scheme of the present application, one side of the conveying assembly is provided with a detection assembly; the detection assembly comprises a support frame; an electric push cylinder is arranged at the top of the support frame; a first vertical slide rail is fixedly installed on one side of the support frame; a pressing block and a top block are movably installed on the side away from the support frame of the first vertical slide rail; wherein a rectangular groove is formed on the side away from the first vertical slide rail of the pressing block, and a sliding rod and a first spring are arranged in the rectangular groove; the sliding rod is slidably connected with a connecting rod; a top rod is movably installed at the end away from the pressing block of the connecting rod through a bearing; an inclined plate is further arranged at the bottom of the pressing block;

[0009] As a further technical scheme of the present application, the top block is located below the pressing block and is arranged in an inclined L shape; a transverse slide rail is arranged on the transverse plane of the top block; a sliding seat is slidably installed on the transverse slide rail; a detection rod is fixedly installed on the sliding seat; a second inclined plate is integrally arranged at the top of the sliding seat; the second inclined plate cooperates with the inclined plate at the bottom of the pressing block; guide rods are arranged on both sides of the sliding seat; a second spring is arranged at the end away from the top block of the guide rod; when detecting, when the driving gear at the output end of the driving motor meshes with the driven gear at the bottom of the placement station, the detection rod contacts the surface of the workpiece under the cooperation of the inclined plate at the bottom of the pressing block and the second inclined plate at the top of the sliding seat, and the detection of the coaxiality of the workpiece is realized;

[0010] As a further technical scheme of the present application, the top block is located below the pressing block and is arranged in an inclined L shape; a transverse slide rail is arranged on the transverse plane of the top block; a sliding seat is slidably installed on the transverse slide rail; a detection rod is fixedly installed on the sliding seat; a second inclined plate is integrally arranged at the top of the sliding seat; the second inclined plate cooperates with the inclined plate at the bottom of the pressing block; guide rods are arranged on both sides of the sliding seat; a second spring is arranged at the end away from the top block of the guide rod; when detecting, when the driving gear at the output end of the driving motor meshes with the driven gear at the bottom of the placement station, the detection rod contacts the surface of the workpiece under the cooperation of the inclined plate at the bottom of the pressing block and the second inclined plate at the top of the sliding seat, and the detection of the coaxiality of the workpiece is realized;

[0011] As a further technical scheme of the present application, the workbench is provided with a groove for driving motor and driving gear to move up and down.

[0012] As a further technical scheme of the present application, the feeding assembly comprises two groups of symmetrically installed rotary air cylinders; a lifting air cylinder is movably installed on the rotary air cylinder; a supporting plate is fixedly installed at the output end of the lifting air cylinder; fixed clamping plates are installed at both ends of the supporting plate; two symmetrically installed clamping air cylinders are arranged in the fixed clamping plates; two clamping arms are movably installed at the output end of the clamping air cylinder.

[0013] As a further technical scheme of the present application, the two groups of fixed clamping plates are connected through a supporting frame; a rotating shaft is arranged between the fixed clamping plate and the supporting frame; a rotary controller is further arranged above the fixed clamping plate; the feeding assembly and the discharging assembly are arranged in the same structure and symmetrically installed.

[0014] As a further technical scheme of the present application, the feeding assembly is further provided with a sliding table and a sliding frame below one end away from the conveying assembly; the sliding frame is provided with two grooves for placing workpieces; the sliding table and the sliding frame are slidingly connected; the sliding table is fixedly installed on the workbench; a feeding transmission belt is further arranged on one side of the sliding table; the workpieces on the sliding frame are transferred to the placing station on the rotary disc through lifting and rotating of the feeding assembly, so as to realize conveying of the workpieces.

[0015] As a further technical scheme of the present application, the rotary disc is provided with a rotary motor; the rotary motor is fixedly installed at the bottom of the workbench in the frame body.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] 1. In the present application, the workpieces are placed on the feeding transmission belt on one side of the feeding assembly during transmission; the positions of the two grooves in the sliding frame are adjusted by the driving device during transmission of the feeding transmission belt, so as to realize transmission of the workpieces into the two grooves in the sliding frame; the two groups of clamping air cylinders are lifted upward by the lifting air cylinder in the feeding assembly; the corresponding lifting air cylinders are controlled to rotate by the rotary controller, so as to realize cooperation of the two clamping arms of the clamping air cylinder with the workpieces, lifting of the workpieces, interchanging of the positions of the two groups of clamping air cylinders by the rotary air cylinder at the bottom of the lifting air cylinder, and placing of the clamped workpieces into the placing station on the rotary disc, so as to realize transmission of the workpieces.

[0018] 2.The utility model discloses, the workpiece on the rotating disc is driven under the belt of rotating motor, realizes rotation to the detection component one side, when the workpiece rotates to the detection component one side, through the electric push jar drive the pressing block and move down along the first vertical slide rail, in the process of pressing block downward movement, the top rod installed on the pressing block is contacted with the top of workpiece under the cooperation of connecting rod, through the cooperation of top rod and the placement station, realize the fixation of workpiece, after the contact of top rod and workpiece, the pressing block continues to move down, when moving, the connecting rod compresses the first spring along the slide bar, realizes the contact of pressing block and the top of top block below, after the contact of pressing block and top block, the top block moves down, at this moment, the second toothed plate at the bottom of top block moves down, the gear at the end of second toothed plate is engaged with second gear, realizes the first toothed plate along the second vertical slide rail of fixed frame one side and moves up, realizes the drive motor on the top of first toothed plate and is lifted up to the driven gear installed on the bottom of placement station, realizes the rotation of placement station drive workpiece.

[0019] 3.The utility model discloses, in the pressing block drive top block and move down at the same time, the cooperation of the second inclined plate of the slide seat top installed on the horizontal slide rail of top block and the inclined plate of pressing block bottom realizes the detection rod fixedly installed on the slide seat and pushes forward, realizes the contact of detection rod end and workpiece surface, realizes the detection of workpiece coaxiality, when the drive gear and driven gear are engaged, detection rod reaches workpiece surface position, realizes the detection of workpiece coaxiality when rotating, this greatly improves the detection efficiency of workpiece, after detection, the pressing block is driven up under the belt of electric push jar, and top block and second toothed plate move up, when the cooperation of second gear, realize the separation between drive gear and driven gear, at this moment, workpiece stops rotating, the slide seat moves back along the two guide rods on horizontal slide rail under the action of second spring, realizes the separation between detection rod end and workpiece. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the three-dimensional structure schematic diagram of the utility model.

[0021] Figure 2 It is another view structure schematic diagram of the utility model in Figure 1 .

[0022] Figure 3 It is the side view of the utility model in Figure 1 .

[0023] Figure 4 It is the rear side structure schematic diagram of the utility model in Figure 3 .

[0024] Figure 5 It is the internal structure schematic diagram of the utility model in Figure 1 .

[0025] Figure 6 It is the internal structure schematic diagram of the utility model inFigure 5 Another perspective structural diagram.

[0026] Figure 7 In this invention Figure 4 Bottom view of the internal structure.

[0027] Figure 8 This is a partial structural diagram of the feeding component in this invention.

[0028] Figure 9 In this invention Figure 7 Enlarged view of the local structure at point C.

[0029] Figure 10 In this invention Figure 4 Enlarged view of the local structure at point A.

[0030] Figure 11 In this invention Figure 5 Enlarged view of the local structure at point B.

[0031] In the diagram: 1-Frame, 2-Feeding assembly, 20-Slide table, 21-Slide carriage, 22-Fixing clamp, 23-Feeding conveyor belt, 24-Clamping arm, 25-Support frame, 26-Lifting cylinder, 27-Rotating cylinder, 28-Clamping cylinder, 29-Rotating shaft, 210-Support plate, 211-Rotation controller, 3-Conveying assembly, 30-Placement station, 31-Driven gear, 32-Turntable, 4-Unloading assembly, 5-Detection assembly, 50-Electric pusher cylinder, 51-Support frame, 52-The... 53-Vertical slide rail, 531-Slide rod, 532-First spring, 533-Sloping plate, 54-Top block, 541-Transverse slide rail, 542-Guide rod, 543-Second spring, 55-Fixing frame, 56-Second vertical slide rail, 57-First toothed plate, 58-Second gear, 59-Second toothed plate, 510-Detection rod, 511-Drive gear, 512-Drive motor, 513-Top rod, 514-Connecting rod, 515-Second sloping plate, 516-Slide seat. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1, please refer to Figures 1-5The embodiment of the application discloses a conveying device capable of detecting surface defects of a piston rod, which comprises a frame body 1, wherein upper feeding assemblies 2 and lower discharging assemblies 4 are arranged at two ends of the frame body 1 respectively, and a conveying assembly 3 is arranged at a middle position of the upper feeding assemblies 2 and the lower discharging assemblies 4; the conveying assembly 3 comprises a rotating disc 32, a plurality of placing stations 30 are arranged on the rotating disc 32, and a driven gear 31 is fixedly installed at the bottom of each placing station 30 through a fixing rod.

[0034] In the embodiment, one side of the conveying assembly 3 is provided with a detection assembly 5; the detection assembly 5 comprises a support frame 51, an electric push cylinder 50 is arranged at the top of the support frame 51, a first vertical sliding rail 52 is fixedly installed at one side of the support frame 51, a pressing block 53 and a top block 54 are movably installed at the side, away from the support frame 51, of the first vertical sliding rail 52; a rectangular groove is formed at the side, away from the first vertical sliding rail 52, of the pressing block 53, a sliding rod 531 and a first spring 532 are arranged in the rectangular groove, the sliding rod 531 is slidably connected with a connecting rod 514, a top rod 513 is movably installed at one end, away from the pressing block 53, of the connecting rod 514 through a bearing, and an inclined plate 533 is further arranged at the bottom of the pressing block 53.

[0035] Please refer to the accompanying drawings Figures 5-7 In the embodiment, the top block 54 is located below the pressing block 53 and is arranged in an inclined L shape, a transverse sliding rail 541 is arranged on the transverse plane of the top block 54, a sliding seat 516 is slidably installed on the transverse sliding rail 541, a detection rod 510 is fixedly installed on the sliding seat 516, a second inclined plate 515 is integrally arranged at the top of the sliding seat 516, the second inclined plate 515 is matched with the inclined plate 533 at the bottom of the pressing block 53, guide rods 542 are arranged at the two sides of the sliding seat 516, and a second spring 543 is arranged at the end, away from the top block 54, of each guide rod 542.

[0036] Specifically, the top block 54 is fixedly installed at the bottom of the second toothed plate 59, the second toothed plate 59 is provided with teeth at the tail end, the second toothed plate 59 is engaged with a second gear wheel 58, the second gear wheel 58 is movably connected with the bottom of the workbench through a semicircular plate, a first toothed plate 57 is arranged at the side, away from the second toothed plate 59, of the second gear wheel 58, the first toothed plate 57 is movably installed in a second vertical sliding rail 56, the second vertical sliding rail 56 is fixedly installed at the bottom of the workbench through a fixing frame 55, the top of the first toothed plate 57 is fixedly connected with the mounting seat of a driving motor 512, the output end of the driving motor 512 is provided with a driving gear 511, and the driving gear 511 is matched with the driven gear 31.

[0037] Please refer to the accompanying drawings Figure 8, through the above technical scheme, during transmission, the workpiece is placed on the feeding transmission belt 23 on one side of the feeding assembly 2, during the transmission process of the feeding transmission belt 23, the sliding frame 21 adjusts the positions of the two grooves in the sliding frame 21 through the driving device, realizes the transmission of the workpiece into the two grooves in the sliding frame 21, lifts the two groups of clamping air cylinders 28 upward through the lifting air cylinder 26 in the feeding assembly 2, then controls the corresponding lifting air cylinder 26 to rotate through the rotation controller 211, realizes the cooperation of the two clamping arms 24 of the clamping air cylinder 28 with the workpiece, realizes the lifting of the workpiece, then exchanges the positions of the two groups of clamping air cylinders 28 through the rotary air cylinder 27 at the bottom of the lifting air cylinder 26, realizes the placement of the clamped workpiece into the placement station 30 on the turntable 32, and realizes the transmission of the workpiece;

[0038] In the embodiment, grooves are formed in the workbench for the up-down movement of the driving motor 512 and the driving gear 511; grooves are also formed in the workbench for the penetration of the second toothed plate 59;

[0039] For further illustration of the embodiment, please refer to Figures 5-8 The feeding assembly 2 comprises two groups of symmetrically installed rotary air cylinders 27; the rotary air cylinders 27 movably have lifting air cylinders 26 installed thereon; the output ends of the lifting air cylinders 26 are fixedly provided with supporting plates 210; the supporting plates 210 have fixed clamping plates 22 installed at both ends; the fixed clamping plates 22 are internally provided with two symmetrically installed clamping air cylinders 28; the output ends of the clamping air cylinders 28 movably have two clamping arms 24 installed thereon;

[0040] Specifically, the two groups of fixed clamping plates 22 are connected through supporting frames 25; the fixed clamping plates 22 and the supporting frames 25 are provided with rotating shafts 29; the fixed clamping plates 22 are further provided with rotation controllers 211 above; the feeding assembly 2 and the discharging assembly 4 are provided with the same structure and are symmetrically installed;

[0041] For further illustration of the embodiment, please refer to Figures 5-7, through the above technical scheme, the workpiece on the turntable 32 is driven by the rotating motor to rotate to the side of the detection assembly 5, when the workpiece rotates to the side of the detection assembly 5, the pressing block 53 is driven by the electric push cylinder 50 to move downward along the first vertical slide rail 52, and the top rod 513 installed on the pressing block 53 is contacted with the top of the workpiece under the cooperation of the connecting rod 514 during the downward movement of the pressing block 53, and the workpiece is fixed through the cooperation of the top rod 513 and the placing station 30, after the top rod 513 is contacted with the workpiece, the pressing block 53 continues to move downward, and when moving, the connecting rod 514 compresses the first spring 532 along the slide rod 513, so that the pressing block 53 is contacted with the top of the top block 54 below, after the pressing block 53 and the top block 54 are contacted, the top block 54 moves downward, and at this time the second tooth plate 59 at the bottom of the top block 54 moves downward, the teeth at the end of the second tooth plate 59 are engaged with the second gear 58, the second gear 58 is movably connected with the bottom of the workbench through the semicircular plate, so that the first tooth plate 57 moves in the opposite direction, the first tooth plate 57 moves upward along the second vertical slide rail 56 on one side of the fixing frame 55, the driving motor 512 at the top of the first tooth plate 57 is lifted upward, so that the driving motor 512 is engaged with the driven gear 31 installed at the bottom of the placing station 30, and the placing station 30 drives the workpiece to rotate; when the workpiece rotates, the placing station 30 is cooperated with the top rod 513 to prevent the workpiece from being deviated;

[0042] Further, while the pressing block 53 drives the top block 54 to move downward, the inclined plate 533 at the bottom of the pressing block 53 is cooperated with the second inclined plate 515 at the top of the sliding seat 516 installed on the horizontal slide rail 541 of the top block 54, so that the detection rod 510 fixedly installed on the sliding seat 516 is pushed forward, the end of the detection rod 510 is contacted with the surface of the workpiece, and the coaxiality of the workpiece is detected, while the driving gear 511 is engaged with the driven gear 31, the detection rod 510 reaches the position of the surface of the workpiece, and the coaxiality of the workpiece is detected when the workpiece rotates, so that the detection efficiency of the workpiece is greatly improved, after the detection is completed, the pressing block 53 moves upward under the driving of the electric push cylinder 50, the top block 54 and the second tooth plate 59 move upward, and the driving gear 511 is separated from the driven gear 31 under the cooperation of the second gear 58, at this time the workpiece stops rotating, the sliding seat 516 moves backward along the two guide rods 542 on the horizontal slide rail 541 under the action of the second spring 543, and the end of the detection rod 510 is separated from the workpiece;

[0043] In the embodiment, the sliding table 20 and the sliding frame 21 are further arranged below one end of the feeding assembly 2 away from the conveying assembly 3; the sliding frame 21 is provided with two grooves for placing the workpieces; the sliding table 20 and the sliding frame 21 are slidingly connected; the sliding table 20 is fixedly installed on the workbench; the sliding table 20 is further provided with a feeding transmission belt 23 on one side;

[0044] The rotating motor is fixedly installed at the bottom of the workbench inside the frame body 1.

[0045] By adopting the above technical scheme, after detection is completed, the rotating motor drives the rotating disc 32 to rotate the detected workpiece to the lower side of the discharging assembly 4, and the workpiece is placed on the conveying belt through the structure on the discharging assembly 4, so that the workpiece is transmitted to the next process.

[0046] Embodiment two, please refer to Figures 1-11 A method capable of detecting surface defects of a piston rod, step one, feeding of the piston rod, the workpiece to be detected is transferred to the placement station 30 above the rotating disc 32 in the conveying assembly 3 through the feeding assembly 2, and the workpiece to be detected is transported to the side of the detection assembly 5 through the rotation of the rotating disc 32;

[0047] Step two, detection of the piston rod, the electric push cylinder 50 in the detection assembly 5 drives the pressing block 53 to move downward along the first vertical slide rail 52, in the process of moving, the top rod 513 connected to the pressing block 53 is in contact with the top of the workpiece, the top rod 513 is fixed to the workpiece through cooperation with the placement station 30, so that the workpiece is prevented from being thrown out of the placement station 30; after the top rod 513 is in contact with the workpiece, the pressing block 53 moves downward again, so that the pressing block 53 drives the top block 54 to move downward,

[0048] When the top block 54 moves downward, the second gear plate 59 at the bottom moves downward, the second gear plate 59 is engaged with the second gear 58, so that the first gear plate 57 moves upward along the second vertical slide rail 56 on one side of the fixed frame 55, the mounting seat of the driving motor 512 is vertically moved upward, the driving motor 512 is engaged with the driven gear 31 at the bottom of the placement station 30, so that the placement station 30 drives the workpiece to rotate;

[0049] Step three, discharging of the piston rod, when the pressing block 53 drives the top block 54 to move downward, the inclined plate 533 at the bottom of the pressing block 53 cooperates with the second inclined plate 515, so that the slide seat 516 at the bottom of the second inclined plate 515 moves forward along the horizontal slide rail 541 on the top block 54, the detection rod 510 is in contact with the surface of the workpiece, so that the coaxiality of the surface of the workpiece is detected.

[0050] It will be obvious to a person skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments and can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. The embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims to the identity of the reference signs therein.

[0051] Furthermore, it should be understood that although the description is made on the basis of the embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A delivery apparatus capable of detecting surface defects of a piston rod, characterized by: Including frame body (1), frame body (1) both ends are provided with feeding assembly (2) and discharging assembly (4) respectively, the middle position of feeding assembly (2) and discharging assembly (4) is provided with conveying assembly (3), the conveying assembly (3) includes carousel (32), carousel (32) is provided with multiple placement stations (30), the bottom of multiple placement stations (30) is fixedly installed with driven gear (31) through fixed rod, Conveying assembly (3) one side is provided with detection assembly (5), detection assembly (5) includes support frame (51), the top of support frame (51) is provided with electric push cylinder (50), the side of support frame (51) is fixedly installed first vertical slide rail (52), the side away from support frame (51) of first vertical slide rail (52) is movably installed with pressing block (53) and top block (54), the bottom of pressing block (53) is further provided with inclined plate (533), The top block (54) is located below the pressing block (53), and is provided in an inclined L shape, a horizontal slide rail (541) is arranged on the horizontal plane of the top block (54), a sliding seat (516) is slidably installed on the horizontal slide rail (541), a detection rod (510) is fixedly installed on the sliding seat (516), a second inclined plate (515) is integrally arranged on the top of the sliding seat (516), and the second inclined plate (515) cooperates with the inclined plate (533) at the bottom of the pressing block (53), The bottom of the top block (54) is fixedly installed with a second toothed plate (59), the second toothed plate (59) is engaged with a second gear (58), the second gear (58) is movably connected to the bottom of the workbench through a semicircular plate, a first toothed plate (57) is arranged on the side of the second gear (58) away from the second toothed plate (59), and the first toothed plate (57) is movably installed in a second vertical slide rail (56), A rectangular groove is formed in the side of the pressing block (53) away from the first vertical slide rail (52), a sliding rod (531) and a first spring (532) are arranged in the rectangular groove, the sliding rod (531) is slidably connected with a connecting rod (514), a top rod (513) is movably installed at the end of the connecting rod (514) away from the pressing block (53) through a bearing, guide rods (542) are arranged on both sides of the sliding seat (516), a second spring (543) is arranged at the end of the guide rod (542) away from the top block (54), the second vertical slide rail (56) is fixedly installed on the bottom of the workbench through a fixing frame (55), the top of the first toothed plate (57) is fixedly connected with the mounting seat of a driving motor (512), the output end of the driving motor (512) is provided with a driving gear (511), the driving gear (511) cooperates with the driven gear (31), grooves are formed in the workbench for the driving motor (512) and the driving gear (511) to move up and down, and grooves are also formed in the workbench for the second toothed plate (59) to pass through.

2. The conveying apparatus capable of detecting surface defects of a piston rod according to claim 1, characterized in that: The feeding assembly (2) comprises two groups of symmetrically installed rotary air cylinders (27); the rotary air cylinders (27) are movably provided with lifting air cylinders (26); the output ends of the lifting air cylinders (26) are fixedly provided with supporting plates (210); the supporting plates (210) are both provided with fixed clamping plates (22); the fixed clamping plates (22) are internally provided with two symmetrically installed clamping air cylinders (28); the output ends of the clamping air cylinders (28) are movably provided with two clamping arms (24).

3. The conveying apparatus capable of detecting surface defects of a piston rod according to claim 2, characterized in that: The two groups of fixed clamping plates (22) are connected through supporting frames (25); the fixed clamping plates (22) and the supporting frames (25) are provided with rotating shafts (29); the fixed clamping plates (22) are further provided with rotary controllers (211) above; the feeding assembly (2) and the discharging assembly (4) are provided with the same structure and are symmetrically installed.

4. The delivery apparatus capable of detecting surface defects of a piston rod according to claim 3, characterized in that: The feeding assembly (2) is further provided with a sliding table (20) and a sliding frame (21) below one end away from the conveying assembly (3); the sliding frame (21) is provided with two grooves for placing workpieces; the sliding table (20) and the sliding frame (21) are slidably connected; the sliding table (20) is fixedly installed on a workbench; the sliding table (20) is further provided with a feeding transmission belt (23) on one side.

5. The conveying apparatus capable of detecting surface defects of a piston rod according to claim 1, characterized in that: The rotating disc (32) is provided with a rotating motor at the bottom; the rotating motor is fixedly installed at the bottom of the internal workbench of the frame body (1).

6. A method of using the delivery device capable of detecting surface defects of a piston rod according to any one of claims 1-5, characterized in that: The method comprises the following steps: Step one, feeding of the piston rod, the workpiece to be detected is transferred to the placing station (30) above the rotating disc (32) in the conveying assembly (3) through the feeding assembly (2), and the workpiece to be detected is transported to the side of the detection assembly (5) through the rotation of the rotating disc (32); Step two, detection of the piston rod, the electric push cylinder (50) in the detection assembly (5) drives the pressing block (53) to move downward along the first vertical sliding rail (52), the top rod (513) connected to the pressing block (53) contacts the top of the workpiece in the moving process, the top rod (513) is fixed through cooperation with the placing station (30), so that the workpiece is prevented from being thrown out of the placing station (30); after the top rod (513) contacts the workpiece, the pressing block (53) moves downward again, so that the pressing block (53) drives the top block (54) to move downward, The top block (54) drives the second toothed plate (59) at the bottom to move downward when moving downward, the second toothed plate (59) is engaged with the second gear (58), the first toothed plate (57) is moved upward along the second vertical slide rail (56) at one side of the fixing frame (55), the mounting seat of the driving motor (512) is vertically moved upward, the driving motor (512) is engaged with the driven gear (31) at the bottom of the placement station (30), the placement station (30) drives the workpiece to rotate; step three, the unloading of the piston rod, when the pressing block (53) drives the top block (54) to move downward, the inclined plate (533) at the bottom of the pressing block (53) is matched with the second inclined plate (515), the slide seat (516) at the bottom of the second inclined plate (515) is moved forward along the horizontal slide rail (541) on the top block (54), the end of the detection rod (510) is contacted with the surface of the workpiece, and the coaxiality of the surface of the workpiece is detected.

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