Automatic drilling device for hydraulic joint nut

Abstract

This invention discloses an automatic drilling device for hydraulic connector nuts, belonging to the field of nut processing technology. It includes a machine base and a feeding mechanism, a transfer mechanism, a drilling assembly, and a clamping assembly mounted thereon. The clamping assembly includes a fixed clamp and a movable clamp driven by a feed cylinder. A pushing assembly is provided at the clamping assembly. The automatic drilling device for hydraulic connector nuts of this application is driven by the pushing assembly, which is connected to the movable clamp. The backward movement of the movable clamp when releasing the nut triggers the pushing assembly to extend and push the finished product directly off. This invention eliminates the redundant action of the transfer mechanism in grabbing and discharging material, utilizing mechanical linkage to achieve automatic material discharge and chip removal, thus shortening the processing cycle.

Description

Technical Field

[0001] This invention relates to the field of nut processing technology, and more particularly to an automatic drilling device for hydraulic connector nuts. Background Technology

[0002] In the field of automated machining of hydraulic connector nuts, existing fully automatic drilling devices typically employ a step-by-step machining process to ensure the machining accuracy and quality of the nut's side holes. Specifically, the device is generally equipped with a vibratory feeder for automatic feeding and has two drilling stations arranged sequentially along the machining line. The station closer to the feeding end is used for rough drilling, while the station closer to the feeding end is used for fine drilling. Material transfer between stations relies primarily on a transfer mechanism mounted above the machine. This transfer mechanism typically includes a horizontally mounted guide rail and a horizontally driven cylinder. A slider is mounted on the guide rail, and a lifting cylinder is vertically mounted on the slider. The extension and retraction ends of the lifting cylinder are connected to a gripper cylinder for holding the nut. During operation, the transfer mechanism picks up the rough-machined nut and moves it to the fine drilling station. After the fine drilling process is completed, the transfer mechanism picks up the finished nut and moves it horizontally to directly above the collection box, then releases the gripper, allowing the nut to fall into the box for collection.

[0003] However, the aforementioned existing technology has a defect in the material unloading process. After the precision drilling process is completed, although the clamp loosens the nut, the nut cannot detach itself from the processing area. This requires secondary intervention from the transfer mechanism above. This means that after the transfer mechanism completes the feeding task, it also needs to perform additional actions of grabbing, transporting and placing the finished product before it can be reset. This method takes up the time that the transfer mechanism should have used for inter-process flow, making it unable to return quickly after processing to respond to the material receiving needs of the previous process, thus limiting the production efficiency of the entire device.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0005] This invention provides an automatic drilling device for hydraulic connector nuts to solve the technical problem in the prior art where the material unloading process after nut processing is handled by an upper transfer mechanism for gripping and long-distance transport, resulting in the transfer mechanism being occupied for too long and unable to quickly reset to respond to the next round of processing.

[0006] This invention employs the following technical solution: an automatic drilling device for hydraulic connector nuts. It includes a machine base and a mounting platform mounted on the machine base; a clamping assembly mounted on the mounting platform, comprising a fixed clamp and a movable clamp disposed opposite each other, and a feed cylinder driving the movable clamp to move closer to or away from the fixed clamp; the fixed clamp has a feeding platform, the inner side of which has a limiting groove adapted to the nut's contour; a drilling assembly mounted on the side of the mounting platform for processing the clamped nut; and a pushing assembly mounted at the clamping assembly, which is kinetically connected to the movable clamp. When the movable clamp moves away from the fixed clamp to loosen the nut, the movable clamp drives the pushing assembly to extend through the limiting groove into the nut placement area to push out the processed nut.

[0007] Furthermore, the pushing assembly includes a reciprocating unit, which includes a rotating shaft rotatably mounted on one side of the fixed clamp, a cam and a gear coaxially mounted on the rotating shaft, and a push rod fitted on the side of the cam. A compression spring is sleeved on the push rod to provide a return force for the push rod. A pusher suitable for being embedded in a limiting groove is fixed at the end of the push rod. The cam has a high point, a low point, and a plane. The distance between the low point of the cam and the axis of the rotating shaft is the same as the distance between the plane and the axis of the rotating shaft. The linear rotation conversion unit includes a support plate fixed to the inner wall of the hollow cavity and a rack slidably mounted on the support plate with an embedded groove. The rack meshes with the gear. The movable clamp is configured to drive the rack to move linearly, and the gear drives the cam to rotate, thereby pushing the push rod to extend and push out the nut.

[0008] Furthermore, it also includes a clutch triggering unit, which includes a connecting rod fixed on the movable clamp and moving synchronously therewith. The connecting rod passes through the fixed clamp and is connected to one side of the rack. The movable clamp has a groove on its side for horizontal displacement of the connecting rod.

[0009] Furthermore, it also includes a gantry support spanning above the installation platform and a transfer mechanism mounted on the gantry support. The transfer mechanism includes a transverse guide rail arranged in the horizontal direction, and at least two independently controlled moving units are slidably coupled on the transverse guide rail. Each moving unit includes a slider slidably mounted on the transverse guide rail, a transverse moving cylinder that independently drives the slider to move, a lifting cylinder mounted on the slider, and a gripper cylinder connected to the output end of the lifting cylinder.

[0010] Furthermore, it also includes a feeding mechanism, which includes a vibratory feeder and a direct vibration feeding trough connected thereto. A station plate is provided on the mounting platform, and a positioning block connected to the direct vibration feeding trough is fixed on the station plate. A feeding trough is provided on the positioning block, and a correction cylinder is provided at the feeding trough. The correction cylinder is used to detect the orientation of the nut hole. A pushing cylinder and a dropping cylinder are respectively provided on the side of the feeding trough. The pushing cylinder is used to push the nut with the correct posture into the next station, and the dropping cylinder is used to remove the nut with the incorrect posture to the correction collection box.

[0011] Furthermore, the clamping assembly is also equipped with a holding unit, which includes a vertically arranged rotary motor connected to a horizontally extending rotating plate. The end of the rotating plate is elastically connected to a holding member via a guide shaft and a telescopic spring. The holding member is adapted to be screwed into the top of the nut and flexibly press against the end face of the nut.

[0012] Furthermore, the drilling assembly includes a linear motion unit one and a linear motion unit two. The linear motion unit one includes a bidirectional lead screw and a servo motor that drives its rotation. Two sets of sliding seats one that move in opposite directions or in opposite directions are fitted on the bidirectional lead screw to adjust the distance between the two sets of drill bits. The linear motion unit two is disposed on the sliding seat one, and its feed direction is perpendicular to the linear motion unit one, and it is used to drive the drill bit to perform feed processing.

[0013] Furthermore, the fixed clamp has a hollow chamber inside or below that communicates with the outside, for discharging drilling debris or for installing the pusher assembly.

[0014] The above-mentioned at least one technical solution adopted in this invention can achieve the following beneficial effects: The automatic drilling device for hydraulic connector nuts uses a pusher component connected to a movable clamp at the clamping assembly. The pusher component is driven by the mechanical action of the movable clamp moving away from the fixed clamp after processing to loosen the nut, thus extending towards the nut placement area and directly pushing out the finished nut. This design achieves simultaneous release upon release, eliminating the need for an additional discharge drive source, effectively simplifying the equipment structure and reducing manufacturing costs. Furthermore, it changes the traditional cumbersome unloading method that relies on an overhead transfer mechanism for gripping, moving, and placing the nut, shortening the time it takes for the nut to leave the workstation after release and making the overall processing cycle of the equipment more compact. Attached Figure Description

[0015] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0016] In the attached diagram: Figure 1 This is an overall schematic diagram of the automatic drilling device for hydraulic connector nuts in this application; Figure 2 for Figure 1 A schematic diagram of a local structure from one perspective; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 for Figure 2 Enlarged view of point B in the middle; Figure 5 for Figure 1 A schematic diagram of the local structure from another perspective; Figure 6 for Figure 5 Enlarged view of point C in the middle; Figure 7 for Figure 5 Enlarged view of point D in the middle; Figure 8 for Figure 5 A schematic diagram of a partial structure; Figure 9 for Figure 8 Enlarged view of point E in the middle; Figure 10 for Figure 8 A schematic diagram of a partial structure; Figure 11 for Figure 10 Enlarged view of point F in the middle; Figure 12 for Figure 11 Enlarged schematic diagram of point G in the middle.

[0017] Figure label: 1. Machine base; 11. Mounting platform; 2. Feeding bracket; 21. Vibratory feeder; 22. Straight vibratory feeder; 3. Clamping assembly; 31. Station plate; 301. Positioning block; 302. Gantry bracket; 32. Feed chute; 33. Correction collection box; 34. Pushing cylinder; 35. Pushing block; 36. Discharging cylinder; 37. Support frame; 38. Correction cylinder; 4. Transfer mechanism; 41. Transverse guide rail; 42. Slider; 43. Transverse movement cylinder; 44. Mounting plate; 45. Lifting cylinder; 46. Gripper cylinder; 5. Clamping assembly; 51. Mounting base plate; 52. Fixed clamp; 521. Hollow chamber; 522. Slide; 53. Discharge platform; 54. 55. Movable clamp; 56. Feed cylinder; 57. Rotary motor; 58. Rotating plate; 59. Holding component; 50. Telescopic spring; 510. Guide shaft; 511. Finished product collection box; 6. Drilling assembly; 61. Bearing seat; 62. Bidirectional lead screw; 63. Sliding seat one; 64. Servo motor; 65. Linear movement unit two; 66. Sliding seat two; 67. Feed motor; 68. Protective cover; 69. Slide rail; 7. Pushing assembly; 71. Rotating shaft; 72. Cam; 721. Gear; 722. Plane; 73. Support plate; 75. Rack one; 77. Auxiliary plate; 78. Compression spring; 79. Push rod; 710. Push component; 711. Connecting rod. Detailed Implementation

[0018] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0019] The technical solutions provided by the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] Reference Figures 1-3 and Figure 5 As shown, the present invention provides an automatic drilling device for hydraulic connector nuts, including a machine base 1 as a supporting foundation, and a mounting platform 11 horizontally arranged on the top of the machine base 1. A feeding mechanism is provided on one side of the machine base 1, specifically including a feeding bracket 2, on which a vibratory feeder 21 is installed for automatically sorting the messy nuts; a direct vibratory feeding trough 22 is connected to the discharge end of the vibratory feeder 21, and one end of the direct vibratory feeding trough 22 extends above the mounting platform 11 for smoothly and continuously conveying the sorted nuts to the processing station.

[0021] A clamping assembly 3 is provided on the mounting platform 11, which integrates material screening and posture correction functions. Specifically, the clamping assembly 3 includes a station plate 31 fixedly mounted on the mounting platform 11, on which a positioning block 301 is fixedly mounted. A feeding groove 32 is provided on the side of the positioning block 301, which connects to the end of the direct vibration feeding groove 22. The corrected nut is suitable for moving along the feeding groove 32 into the subsequent clamping area. In addition, a gantry bracket 302 is also provided across the mounting platform 11 for installing the transfer or processing drive components required for subsequent processes.

[0022] To ensure the correct orientation of the drilled holes in the nuts (i.e., distinguishing the front and back of the nuts), a posture correction and screening mechanism is installed at the feed chute 32. A support frame 37 is fixed on the workstation plate 31, and a correction cylinder 38 is vertically mounted on the support frame 37. The telescopic end of the correction cylinder 38 is connected to a detection end head adapted to the nut hole diameter for detecting the placement posture of the nuts. For screening, a pusher cylinder 34 and a discharge cylinder 36 (for removing waste materials) are respectively installed on the side of the positioning block 301. The output ends of both the pusher cylinder 34 and the discharge cylinder 36 are connected to push blocks 35. The pusher cylinder 34 is used to press and position the nuts conveyed from the linear vibrating feed chute 22 toward the push block 35 of the discharge cylinder 36 to facilitate the correction cylinder 38's detection of the nuts. The discharge cylinder 36 is arranged in a position suitable for pushing the nuts laterally, and a correction collection box 33 is correspondingly provided on its side.

[0023] The working principle of the feeding correction and screening of this device is as follows: When the nut is conveyed from the vibratory plate 21 to the detection position through the direct vibration feeding groove 22, the pushing cylinder 34 is activated to push the nut to the side of the push block 35 of the dropping cylinder 36 for positioning. Then the correction cylinder 38 is activated to drive the detection end head to move down and try to extend into the inner hole of the nut.

[0024] If the detection end is obstructed and cannot extend into the nut (indicating that the nut's drilling position is facing incorrectly or in the opposite direction), the nut's posture is determined to be incorrect. At this time, the dropping cylinder 36 is activated, and its extension end pushes the incorrectly positioned nut laterally into the correction collection box 33 for collection. There is a gap between the push block 35 of the dropping cylinder 36 and the side wall of the linear vibrating feed trough 22, allowing the incorrectly positioned nut to fall into the correction collection box 33 through this gap.

[0025] If the detection end can smoothly extend into the nut (indicating that the nut's drill hole is facing correctly), the nut's posture is determined to be correct; at this time, the nut enters the subsequent workstation along the feed groove 32. It should be noted that, since the nut to be processed has a regular hexagonal structure, the push block 35, during the process of pushing the side of the nut to enter the feed groove 32, utilizes the limiting action of the feed groove 32 to maintain the nut in a symmetrical and upright posture at all times, thus facilitating the subsequent gripping and positioning by the robot or fixture.

[0026] Reference Figure 2 and Figures 4-6 As shown, a transfer mechanism 4 is installed on the top crossbeam of the gantry support 302. This transfer mechanism 4 spans across each processing station and is used to achieve efficient and automated gripping and relay transfer of nuts between different stations.

[0027] Specifically, a transverse guide rail 41 is fixedly installed horizontally on the side wall of the gantry support 302. To meet the needs of multi-station continuous processing, two sets of independently operating moving units are slidably fitted on the transverse guide rail 41, and these two sets of moving units are arranged sequentially along the length of the guide rail. Each moving unit includes a slider 42 slidably disposed on the transverse guide rail 41, and the slider 42 can slide linearly along the transverse guide rail 41 with low friction.

[0028] In terms of the drive structure, in order to achieve independent control and non-interference between the two sets of moving units, two sets of transverse moving cylinders 43 are arranged on the gantry bracket 302 parallel to the transverse guide rail 41. The output ends of the two sets of transverse moving cylinders 43 are respectively connected to the two sets of sliders 42 in a one-to-one transmission connection, thereby driving their respective sliders 42 to perform independent reciprocating linear motion in the horizontal direction.

[0029] Regarding the execution components, a vertically downward mounting plate 44 is fixedly connected to the outer side of each slider 42. A lifting cylinder 45 is vertically fixedly mounted on the outer surface of the mounting plate 44. The telescopic output end of the lifting cylinder 45 extends vertically downward to provide lifting action in the Z-axis direction. A gripper cylinder 46 is connected to the bottom of the output end of the lifting cylinder 45. A pair of relatively opening and closing gripping fingers are installed at the lower end of the gripper cylinder 46 for precise gripping of the nut.

[0030] At the start of the operation, two sets of transverse moving cylinders 43 drive their respective sliders 42 to slide along the transverse guide rail 41, sending the two moving units directly above the material handling position (for example, the first moving unit moves above the loading position, and the second moving unit moves above the roughing position). Subsequently, the lifting cylinders 45 operate synchronously or independently, driving the output end to extend and causing the gripper cylinders 46 to move vertically downward to the gripping height; the gripper cylinders 46 control the gripping fingers to close, clamping the raw material nut and the semi-finished nut respectively.

[0031] After clamping is complete, the lifting cylinder 45 retracts, lifting the nut vertically to avoid interference from below. Then, the lateral movement cylinder 43 actuates again, driving the slider 42 to move horizontally to the next process position (for example, the previous unit transports the raw material to the roughing position, and the next unit transports the semi-finished product to the finishing position), realizing synchronous aerial transfer of materials.

[0032] When the moving unit reaches directly above the target station, the lifting cylinder 45 extends and moves downward again, precisely delivering the nut into the clamping station below; the gripper cylinder 46 releases, completing the unloading. Subsequently, the lifting cylinder 45 retracts back to its original position, and the lateral movement cylinder 43 drives the slider 42 to move in the opposite direction back to the initial material-picking position, waiting for the next cycle.

[0033] Reference Figures 5-6 and Figures 8-9 As shown, two sets of clamping components 5 are arranged side by side on the workstation plate 31. The two sets of clamping components 5 correspond to two processing steps, such as the rough drilling station in the front step and the fine drilling station in the back step. Each set of clamping components 5 includes a mounting base plate 51 fixedly installed on the workstation plate 31. A fixed clamping seat 52 and a movable clamping seat 54 are arranged opposite each other on the mounting base plate 51. The two cooperate to form a processing area for accommodating and clamping nuts.

[0034] Specifically, the fixed clamp 52 is fixed to one side of the mounting base plate 51 to maintain a fixed position. The fixed clamp 52 has a downwardly recessed feeding platform 53, and its inner side is provided with a V-shaped limiting groove that adapts to the hexagonal outer contour of the nut for initial positioning of the nut; it is used to support the nut to be processed before clamping; the movable clamp 54 can be close to or away from the fixed clamp 52. Its driving source comes from the feed cylinder 55 fixed on the work station plate 31. The output end of the feed cylinder 55 is connected to and pushes the movable clamp 54 to move towards the fixed clamp 52, thereby realizing the horizontal clamping and fixing of the nut. To further improve stability during drilling and prevent the nut from bouncing or shifting under the cutting force of the high-speed rotation of the drill bit, a clamping unit is also provided on the side of the clamping assembly 5. The clamping unit includes a rotary motor 56 vertically mounted on the work station plate 31, and the output shaft of the rotary motor 56 is connected to a horizontally cantilevered rotating plate 57. A guide shaft 510 is vertically inserted downward at the end of the rotating plate 57, and a clamping member 58 (pressure foot) is installed at the bottom end of the guide shaft 510; in order to achieve flexible contact, a telescopic spring 59 is sleeved on the guide shaft 510 between the clamping member 58 and the rotating plate 57.

[0035] Working principle: After the feed cylinder 55 drives the movable clamping seat 54 to horizontally clamp the nut, the rotary motor 56 actuates, driving the rotating plate 57 to rotate directly above the machining area, aligning the holding member 58 with the top of the nut. At this time, the elastic downward pressure generated by the telescopic spring 59 flexibly presses the upper end face of the nut with the holding member 58. This design achieves a dual fixing mode of horizontal rigid clamping + vertical flexible pressing, improving machining accuracy and safety.

[0036] Reference Figure 5 and Figures 7-8As shown, a drilling assembly 6 is installed on the mounting platform 11 and located outside the clamping assembly 5. Specifically, the drilling assembly 6 includes a linear movement unit 1 horizontally arranged on the mounting platform 11. The linear movement unit 1 includes two sets of bearing seats 61 fixed on the mounting platform 11. A bidirectional lead screw 62 is rotatably connected between the two sets of bearing seats 61. A servo motor 64 is connected to one end of the bidirectional lead screw 62. The servo motor 64 drives the bidirectional lead screw 62 to rotate. Two sets of sliding seats 63 are installed on the bidirectional lead screw 62. A slide rail 69 is arranged parallel to both sides of the bearing seats 61. The sliding seats 63 are slidably arranged on the slide rail 69. When the servo motor 64 drives the bidirectional lead screw 62 to rotate, it will drive the two sets of sliding seats 63 to move synchronously towards each other or synchronously away from each other along the slide rail 69 to adapt to the spacing requirements between different workstations. To achieve the feed action of the drill bit, linear motion units 65 are mounted on the two sets of sliding seats 63. The arrangement direction of the linear motion units 65 is perpendicular to the linear motion units 1 (i.e., towards the clamping assembly 5). The linear motion unit 65 is structurally similar to the linear motion unit 1, except that it uses a one-way lead screw (a conventional ball screw). The sliding seat of the linear motion unit 65 is defined as sliding seat 66. A feed motor 67 (power head) is fixedly mounted on the sliding seat 66, and the drill bit is mounted on the output end of the feed motor 67. In addition, to prevent drilling debris from contaminating the lead screw, a protective cover 68 is fixed to the side of the sliding seat 66. The protective cover 68 moves with the sliding seat and extends and retracts to shield the internal lead screw. The feed motor 67 is driven forward by the linear motion unit 65 to complete the automated drilling operation of the nut.

[0037] Reference Figures 8-12 As shown, in order to achieve automatic unloading of finished nuts at the precision drilling station without requiring the transfer mechanism 4 to grip them again, this device has been specially designed at the precision drilling station. Specifically, a transparent hollow cavity 521 is opened inside the fixed clamp 52, and a pusher assembly 7 is installed on the side of the fixed clamp 52. The pusher assembly 7 uses the opening and closing action of the movable clamp 54 as a power source to achieve the linkage effect of "discharging material as the clamp is released".

[0038] The feeding assembly 7 mainly includes a reciprocating unit, a linear-rotation conversion unit, and a clutch triggering unit. The reciprocating unit includes a rotating shaft 71 vertically rotatably mounted within a hollow chamber 521. A cam 72 (serving as the reciprocating drive core) and a gear 721 located below the cam 72 are coaxially fixed on the rotating shaft 71. The cam 72 has a high point, a low point, and a plane 722. The distance between the low point of the cam 72 and the axis of the rotating shaft 71, and the distance between the plane 72 and the axis of the rotating shaft 71, are the same. A push rod 79 is fitted to the side of the cam 72. The push rod 79 horizontally penetrates and is fixed to an auxiliary plate 77 at the top of the inner wall of the chamber. One end of the push rod 79 has a raised edge, and a compression spring 78 is sleeved on the push rod 79. The two ends of the compression spring 78 abut against the raised edge and the auxiliary plate 77 respectively, and are used to provide the retraction force of the push rod 79. The head end of the push rod 79 is fixed with a pusher 710. The pusher 710 is embedded in the V-shaped limiting groove of the fixed clamp 52. In the initial state, the low point of the cam 72 is in contact with one end of the push rod 79. At this time, the pusher 710 is just embedded in the V-shaped limiting groove of the fixed clamp 52. When the cam 72 rotates and pushes the push rod 79, the high point of the cam 72 gradually contacts one end of the push rod 79. At this time, the pusher 710 at the other end of the push rod 79 pushes out the nut on the feeding table 53. In order to convert linear power into rotational power of cam 72, the linear-rotation conversion unit includes a support plate 73 fixed to the inner wall of the hollow chamber 521. A through-hole (not shown in the figure) is provided on the side of the support plate 73 near the gear 721, and a rack 75 is slidably arranged in the groove, which meshes with the gear 721. The clutch triggering unit includes a right-angled connecting rod 711 fixed to the inner wall of the movable clamp 54. The connecting rod 711 passes through the fixed clamp 52 and is connected to the side of the rack 75. At the same time, a sliding groove 522 is provided on the side of the movable clamp 54 to allow the connecting rod 711 to move horizontally, so that the rack 75 moves synchronously with the movable clamp 54.

[0039] When the processing is completed, the movable clamp 54 is gradually moved away from the fixed clamp 52 by the feed cylinder 55 to loosen the nut. The movable clamp 54 drives the connecting rod 711 to move synchronously. At this time, the connecting rod 711 synchronously pulls the rack 75 to make linear motion. The rack 75 drives the gear 721 and the cam 72 to rotate. One end of the push rod 79 gradually moves from the contact low point and plane to the contact high point of the cam 72, and then gradually pushes the push rod 79, so that the pusher 710 extends and pushes the finished nut on the unloading table 53 off.

[0040] When the feed cylinder 55 drives the movable clamp 54 to reset (i.e., to prepare to clamp the next nut), the movable clamp 54 again drives the rack 75 to move with the help of the connecting rod 711, which in turn drives the drive gear 721 and cam 72 to rotate again. At this time, the contact end of the push rod 79 slides from the high point of the cam 72 to the plane 722 (i.e., the low position area). Since the distance between the plane 722 and the center of the rotating shaft 71 is less than the distance of the high point, the push rod 79 instantly loses the support of the high point. As a result, the push part 710 rebounds and retracts instantly under the restoring force of the compression spring 78, so that the push part 710 is re-embedded in the V-shaped limiting groove of the fixed clamp 52. At this time, the push part 710 returns to the safe position to make room for the next feeding (at this time, the movable clamp 54 is still in the open state, which is convenient for inserting a new nut). At this time, the feed cylinder 55 stops feeding. After the new nut is inserted, the movable clamp 54 moves closer to the fixed clamp 52 to clamp it. The connecting rod 711 drives the rack 75 to reset, so that the lowest point of the cam 72 contacts one end of the push rod 79. At this time, the pusher 710 is embedded in the V-shaped limiting groove of the fixed clamp 52, preparing for the next round of pushing action.

[0041] Reference Figure 9 and Figure 10 As shown, in order to solve the problem of recycling the finished nuts after drilling, a finished product collection box 511 is set below the precision drilling station.

[0042] Working principle: At the start of operation, the feeding mechanism is activated, and the vibratory feeder 21 sorts and arranges the scattered nuts, which are then continuously conveyed to the detection position of the front clamping assembly 3 via the linear vibratory feeding chute 22. At this time, the correction cylinder 38 is activated, driving the detection end to move down to detect and identify the orientation of the drill hole of the first nut: if the detection end is obstructed, it indicates that the nut is in the wrong orientation, and the dropping cylinder 36 immediately moves to remove it to the correction collection box 33; if the detection is qualified, the nut is positioned to the picking point along the feeding chute 32. Next, the transfer mechanism 4, mounted on the gantry support 302, intervenes. The previous set of moving units slides above the loading position, and uses the lifting cylinder 45 in conjunction with the gripper cylinder 46 to grab the raw material nut and transfer it horizontally to the rough drilling position, placing it between the fixed clamp 52 and the movable clamp 54 of the clamping assembly 5 at that position. After the nut is in place, the feed cylinder 55 of each position drives the movable clamp 54 to move closer to the fixed clamp 52, achieving a horizontal and rigid clamping of the nut; then, the side pressing unit is activated, and the rotary motor 56 drives the rotating plate 57 to screw into the top, using the spring-loaded pressing member 58 to flexibly press the top of the nut, forming a stable double lock in the horizontal and vertical directions.

[0043] After locking is completed, the outer drilling assembly 6 moves, the servo motor 64 drives the bidirectional lead screw 62 to rotate, and adjusts the lateral spacing of the two sets of drilling units to center the work position; then the feed motor 67 rotates at high speed and is driven forward by the linear motion unit 65 to simultaneously perform rough drilling and fine drilling operations at the two work positions.

[0044] After processing is completed, the drill bit retracts. In the roughing stage, the movable clamp 54 releases, and the next set of moving units of the transfer mechanism 4 grabs the semi-finished product and transfers it to the precision drilling stage, achieving continuous processing on the assembly line. In the precision drilling stage, when processing is complete and the movable clamp 54 retracts to release the finished product nut, the device's unique mechanical linkage mechanism simultaneously triggers the discharge and screening actions: as the movable clamp 54 retracts, the pusher assembly 7 connected to its side is driven synchronously. The connecting rod 711 pulls the rack 75 to move, driving the cam 72 in the reciprocating unit to rotate. The high point of the cam pushes the push rod 79, directly pushing the finished nut on the feeding table into the finished product collection box 511 below, without the need for the robot arm to grab it again.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An automatic drilling device for hydraulic connector nuts, characterized in that, include: Machine base (1) and mounting platform (11) installed on the machine base (1); A clamping assembly (5) is provided on the mounting platform (11). The clamping assembly (5) includes a fixed clamp (52) and a movable clamp (54) arranged opposite to each other, and a feed cylinder (55) that drives the movable clamp (54) to move closer to or away from the fixed clamp (52). The fixed clamp (52) has a feeding platform (53), and the inner side of the feeding platform (53) is provided with a limiting groove that adapts to the nut profile. A drilling assembly (6) is provided on the side of the mounting platform (11) for machining the clamped nut; The pusher assembly (7) is located at the clamping assembly (5). The pusher assembly (7) is connected to the movable clamp (54) in a transmission manner. When the movable clamp (54) moves away from the fixed clamp (52) to loosen the nut, the movable clamp (54) drives the pusher assembly (7) to extend into the nut placement area through the limiting groove to push out the processed nut.

2. The automatic drilling device for hydraulic connector nuts according to claim 1, characterized in that, The feeding assembly (7) includes a reciprocating unit, which includes a rotating shaft (71) rotatably mounted on one side of the fixed clamp (52), a cam (72) and a gear (721) coaxially mounted on the rotating shaft (71), and a push rod (79) fitted on the side of the cam (72). A compression spring (78) is sleeved on the push rod (79) to provide the push rod (79) with a return force. The end of the push rod (79) is fixed with a pusher (710) suitable for being embedded in the limiting groove. The cam (72) has a high point, a low point, and a plane (722). The distance between some low points and the axis of the rotating shaft (71) is the same as the distance between the plane (722) and the axis of the rotating shaft (71); the linear rotation conversion unit includes a support plate (73) fixed to the inner wall of the hollow chamber (521) and a rack (75) slidably disposed on the support plate (73) having an embedded groove, the rack (75) meshing with the gear (721), the movable clamp (54) being configured to drive the rack (75) to linear displacement, and drive the cam (72) to rotate through the gear (721) to push the push rod (79) to extend to push out the nut.

3. The automatic drilling device for hydraulic joint nuts according to claim 2, characterized in that, It also includes a clutch triggering unit, which includes a connecting rod (711) fixed on the movable clamp (54) and moving synchronously therewith. The connecting rod (711) passes through the fixed clamp (52) and is connected to the side of the rack (75). The side of the movable clamp (54) is provided with a groove (522) for the horizontal displacement of the connecting rod (711).

4. The automatic drilling device for hydraulic joint nuts according to claim 1, characterized in that, It also includes a gantry bracket (302) spanning above the installation platform (11) and a transfer mechanism (4) mounted on the gantry bracket (302). The transfer mechanism (4) includes a horizontal guide rail (41) arranged in the horizontal direction. At least two independently controlled moving units are slidably engaged on the horizontal guide rail (41). Each moving unit includes a slider (42) slidably mounted on the horizontal guide rail (41), a horizontal moving cylinder (43) that independently drives the slider (42) to move, a lifting cylinder (45) mounted on the slider (42), and a gripper cylinder (46) connected to the output end of the lifting cylinder (45).

5. The automatic drilling device for hydraulic connector nuts according to claim 1, characterized in that, It also includes a feeding mechanism, which includes a vibratory feeder (21) and a direct vibration feeding trough (22) connected thereto. A station plate (31) is provided on the installation platform (11). A positioning block (301) connected to the direct vibration feeding trough (22) is fixed on the station plate (31). A feeding trough (32) is provided on the positioning block (301). A correction cylinder (38) is provided at the feeding trough (32). The correction cylinder (38) is used to detect the orientation of the nut hole. A pushing cylinder (34) and a dropping cylinder (36) are respectively provided on the side of the feeding trough (32). The pushing cylinder (34) is used to push the nut with qualified posture into the next station. The dropping cylinder (36) is used to remove the nut with incorrect posture to the correction collection box (33).

6. The automatic drilling device for hydraulic joint nuts according to claim 1, characterized in that, The clamping assembly (5) is also equipped with a pressing unit, which includes a vertically arranged rotary motor (56), the rotary motor (56) is connected to a horizontally extending rotating plate (57), and the end of the rotating plate (57) is elastically connected to a pressing member (58) through a guide shaft (510) and a telescopic spring (59). The pressing member (58) is adapted to be screwed into the top of the nut and flexibly press the end face of the nut.

7. The automatic drilling device for hydraulic joint nuts according to claim 1, characterized in that, The drilling assembly (6) includes a linear motion unit one and a linear motion unit two (65). The linear motion unit one includes a bidirectional lead screw (62) and a servo motor (64) that drives it to rotate. Two sets of sliding seats (63) that move in opposite directions or in opposite directions are fitted on the bidirectional lead screw (62) to adjust the distance between the two sets of drill bits. The linear motion unit two (65) is set on the sliding seat one (63) and its feed direction is perpendicular to the linear motion unit one to drive the drill bit to perform feed processing.

8. An automatic drilling device for hydraulic joint nuts according to claim 1 or 2, characterized in that, The fixed clamp (52) has a hollow chamber (521) that communicates with the outside, which is used for the discharge of drilling waste or for the installation of the pusher assembly (7).

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