A reverse hole forming device for small diameter pipes

Abstract

This invention relates to the field of pipe processing technology and discloses a reverse drilling device for small-diameter pipes. The device includes a base mechanism, a support plate, a support column fixedly mounted on the support plate, and a drilling and tapping machine fixedly mounted on the support column. The drilling and tapping machine includes a lifting mechanism with a lifting shaft. A placement mechanism is also fixedly mounted on the support plate. Above the placement mechanism is a drilling mechanism fixedly mounted below the lifting shaft. At the bottom of the drilling mechanism is a rotating mechanism that allows the drilling mechanism to rotate around the lifting shaft. Below the rotating mechanism is a positioning mechanism for controlling the rotation angle of the drilling mechanism. This invention uses two side limiting plates to axially clamp and position the pipe, ensuring stable clamping and preventing pipe movement during processing, thus guaranteeing good hole consistency. Furthermore, the drilling mechanism can be manually deflected at a certain angle, facilitating pipe insertion and subsequent repositioning for processing, and simplifying the loading operation.

Description

Technical Field

[0001] This invention relates to the field of pipe processing technology, and in particular to a reverse hole forming device for small-diameter pipe inner holes. Background Technology

[0002] Some pipes have high requirements for the integrity of their outer surface. If conventional external drilling methods are used, burrs, scratches or local extrusion deformation are easily generated on the outer wall of the pipe, which not only affects the appearance of the product, but also makes it difficult to assemble and use later. Drilling from the inside out can concentrate the burrs at the hole opening on the inside of the pipe, which is convenient for later cleaning and effectively ensures that the outer wall of the pipe is smooth and intact without processing damage.

[0003] Existing equipment for drilling pipes from the inside out has the following problems when in use: the axial limiting and clamping effect of the pipe is not good, and it is easy to move during the processing, which will cause the hole position to deviate; at the same time, the drilling mechanism is a fixed and non-adjustable structure, and when the pipe is sleeved on the outside of the drill bit, it is easy to be interfered with and blocked by the placement mechanism, which makes the feeding operation inconvenient. Summary of the Invention

[0004] The purpose of this invention is to provide a reverse drilling device for small-diameter pipes. The device uses two side limiting plates to axially clamp and position the pipe, ensuring stable clamping and preventing the pipe from shifting during processing. This ensures good hole consistency, and the drilling mechanism can be manually deflected at a certain angle, making it convenient to insert the pipe and then reset it for processing. The feeding operation is also simple.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a reverse drilling device for the inner hole of a small diameter pipe, comprising a base mechanism, the base mechanism comprising a support plate, a support column fixedly disposed on the support plate, a drilling and tapping machine fixedly disposed on the support column, the drilling and tapping machine comprising a lifting mechanism, the lifting mechanism comprising a lifting shaft, a placement mechanism fixedly disposed on the support plate, a drilling mechanism fixedly disposed above the placement mechanism and disposed below the lifting shaft, a rotating mechanism disposed at the bottom of the drilling mechanism that enables the drilling mechanism to rotate around the lifting shaft, and a positioning mechanism disposed below the rotating mechanism that can be used to control the rotation angle of the drilling mechanism.

[0006] A further embodiment of the present invention is: the placement mechanism includes a support assembly fixedly mounted on a support plate, the support assembly includes two vertical supports fixedly mounted on the support plate and parallel to each other, a bearing panel is fixedly mounted at the top of the two vertical supports, a V-shaped groove is opened in the middle of the bearing panel, two support plates are symmetrically arranged in the V-shaped groove, the upper ends of the two support plates are respectively fixedly connected to the opening edge of the corresponding V-shaped groove of the bearing panel, the two support plates are inclined downward and their lower ends intersect each other, together forming a V-shaped support structure for placing pipes;

[0007] Limiting components are provided on the two support plates. The limiting components include a first limiting plate and a second limiting plate, which are respectively set at both ends of the V-shaped groove and can slide along the length of the V-shaped groove. The second limiting plate is set at the end near the lifting mechanism. The second limiting plate has a clearance groove at the position corresponding to the drilling mechanism to avoid interference with the drilling mechanism. A slide is provided at the lower end junction of the two support plates for the sliding of the first limiting plate and the second limiting plate. Rubber pads are fixedly installed on the inner surface of the first limiting plate and the second limiting plate.

[0008] A further provision of the present invention is that: a sliding component is fixedly provided at the bottom of both the first limiting plate and the second limiting plate; a first driving component for driving the movement is provided on one side of the sliding component; and a balancing component for balancing the movement is provided on the other side of the sliding component.

[0009] A further configuration of the present invention is: the sliding component includes a butterfly block, the butterfly block includes a fixing block fixedly disposed at the bottom of the first limiting plate, and a first connecting block and a second connecting block are respectively fixedly disposed on both sides of the fixing block;

[0010] The first drive assembly includes a motor support frame fixedly mounted inside the vertical support. A first motor is mounted and supported on the motor support frame. A mounting frame is fixedly provided below the middle of the bearing panel along its length. The mounting frame includes a first mounting strip and a second mounting strip arranged relatively parallel to each other. The upper ends of the first mounting strip and the second mounting strip are fixedly connected to the lower part of the bearing panel. A gear is provided at the lower position between the first mounting strip and the second mounting strip. A central shaft is fixedly passed through the center of the gear. The central shaft is rotatably connected to the first mounting strip and the second mounting strip respectively. The output shaft of the first motor is connected to the central shaft through a first transmission belt.

[0011] A further feature of the present invention is that the sliding assembly further includes a connecting plate fixedly disposed on the lower part of the bearing panel, and a first slide block located at the upper position between the first mounting strip and the second mounting strip is fixedly disposed at the lower end of the connecting plate. A first slide groove is provided in the first slide block, and the length of the first slide groove is the same as the length of the bearing panel. The sliding assembly further includes a rack, the upper part of which engages with the first slide groove and can slide along the first slide groove, and the lower part of which meshes with a gear.

[0012] The balancing assembly includes a second slide fixedly mounted on the lower part of an inclined support plate. A second slide groove is provided in the second slide. The length of the first slide groove is half the length of the support plate. A balancing block is slidably mounted in the second slide groove, which can engage with the second slide groove and slide along the second slide groove. The side of the first connecting block opposite to the fixed block is fixedly connected to the side of the rack. The upper surface of the second connecting block is fixedly connected to the lower surface of the balancing block.

[0013] The placement mechanism also includes a cover assembly, which includes a cover plate disposed on the outside of the first drive assembly to block flying debris. The two ends of the cover plate are detachably connected to two vertical supports, and the upper end of the cover plate is detachably connected to the support panel.

[0014] A further embodiment of the present invention is that the drilling mechanism includes a drilling assembly for drilling, a drill frame assembly for mounting the drilling assembly, a second drive assembly for driving the drilling assembly to perform drilling, and a disassembly assembly for enabling the drill frame assembly to be detachably connected.

[0015] A further configuration of the present invention is as follows: the second drive assembly includes a motor mounting plate fixedly disposed at the lower end of the lifting shaft, a second motor is disposed below the motor mounting plate, mounting ears are fixedly disposed at both ends of the top surface of the second motor, and the second motor is bolted to the motor mounting plate through the mounting ears;

[0016] The drill frame assembly includes an upper mounting plate and a lower mounting plate arranged parallel to and below the upper mounting plate. One end of the upper mounting plate passes through the drive shaft of the motor, is rotatably connected to the drive shaft and engaged to limit its movement, preventing the upper mounting plate from sliding down. The other end of the upper mounting plate is provided with a driven shaft. The upper mounting plate passes through the driven shaft, is rotatably connected to the driven shaft and engaged to limit its movement, preventing the upper mounting plate from sliding down along the driven shaft. The two ends of the lower mounting plate are rotatably connected to the drive shaft and the driven shaft, respectively. The drive shaft and the driven shaft are connected by a second transmission belt.

[0017] The assembly and disassembly components include a threaded connecting block fixedly mounted on the lower surface of the upper mounting plate and a positioning frame fixedly mounted on the upper surface of the lower mounting plate. The positioning frame corresponds to the position of the threaded connecting block and can be fitted onto the outside of the threaded connecting block. The lower mounting plate has a threaded hole at the position corresponding to the positioning frame, and the threaded connecting block has a threaded groove at the position corresponding to the threaded hole. The lower mounting plate and the upper mounting plate are fixedly connected by fixing bolts passing through the threaded hole and the threaded groove. Loosening the fixing bolts can release the fixation between the lower mounting plate and the upper mounting plate, realizing the quick assembly and disassembly of the drill frame assembly.

[0018] The drilling assembly includes a drill shaft fixedly connected to the lower end of a driven shaft, and a drill bit is fixedly connected to the lower end of the drill shaft.

[0019] A further embodiment of the present invention is that the rotating mechanism includes a rotating component, the rotating component includes a convex ring fixedly disposed on the outer edge of the lower surface of the second motor, and a concave ring is provided on the upper surface of the upper mounting plate corresponding to the convex ring. The drilling mechanism can rotate along the convex ring through the cooperation of the concave ring and the convex ring.

[0020] A further feature of the present invention is that the positioning mechanism includes a positioning component for controlling the rotation angle of the drilling mechanism. The positioning component includes a disc fixedly disposed on the lower bottom surface of the lower mounting plate and corresponding to the position of the active rotating shaft. The disc has an inner groove. The positioning component also includes a locking block that engages with the inner groove.

[0021] A further embodiment of the present invention includes: the positioning mechanism further includes a lifting component for lifting the locking block so that the locking block is engaged in the inner groove, and a fixing component for fixing the lifting component to the drilling machine. The fixing component includes a fixing seat fixedly disposed on the bottom surface of the drilling machine, a vertical rod fixedly disposed on the lower part of the fixing seat, and a horizontal rod fixedly connected to the bottom end of the vertical rod. The lifting component includes a cylinder fixedly disposed on the horizontal rod and located below the drilling mechanism, and the locking block is fixedly disposed at the top end of the cylinder extension rod.

[0022] The beneficial effects of this invention are:

[0023] 1. The drilling mechanism can be manually deflected at a certain angle, making it convenient to insert the pipe and then reset it for processing. The feeding operation is simple.

[0024] 2. The pipe is axially clamped and positioned by the limiting plates on both sides, which ensures stable clamping and prevents the pipe from moving during processing, thus ensuring good consistency of hole positions.

[0025] 3. The drill frame adopts a detachable structure, which can be quickly disassembled by loosening the bolts, making it convenient for maintenance and replacement of related parts of the drill frame assembly.

[0026] 4. The drilling mechanism is positioned by using a polygonal groove and a locking block, which ensures reliable locking and prevents slippage, thus ensuring that the drill bit is aligned with the machining center line and effectively improving the drilling position accuracy. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of a small-diameter pipe inner hole reverse drilling device of the present invention, in which a pipe is placed on a support assembly and the limiting assembly does not limit the pipe.

[0029] Figure 2 This is a schematic diagram of the overall structure of a small-diameter pipe inner hole reverse drilling device of the present invention, in which a pipe is placed on a support assembly and the limiting assembly does not limit the pipe.

[0030] Figure 3This is a schematic diagram of the overall structure of a small-diameter pipe inner hole reverse drilling device of the present invention, in which a pipe is placed on a support assembly and a limiting assembly limits the pipe.

[0031] Figure 4 This is a schematic diagram of the overall structure of a reverse hole forming device for small-diameter pipes according to the present invention;

[0032] Figure 5 This is a bottom view schematic diagram of a reverse hole-forming device for small-diameter pipes according to the present invention;

[0033] Figure 6 This is a schematic elevation view of the first driving component of a reverse hole-forming device for small-diameter pipes according to the present invention.

[0034] Figure 7 This is a schematic diagram of the support assembly, the limiting assembly, and the first driving assembly of a reverse hole-forming device for small-diameter pipes according to the present invention.

[0035] Figure 8 This is a top view of the first driving component and the balancing component of a reverse hole forming device for small-diameter pipes according to the present invention.

[0036] Figure 9 This is a schematic diagram of the support assembly and limiting assembly of a reverse hole forming device for small-diameter pipes according to the present invention;

[0037] Figure 10 This is a schematic diagram of the structure of the first driving component and the limiting component of the reverse hole forming device for small diameter pipes according to the present invention;

[0038] Figure 11 This is a schematic diagram of the drilling mechanism of a reverse hole-forming device for small-diameter pipes according to the present invention;

[0039] Figure 12 This is a partial structural diagram of point A of the reverse hole forming device for small-diameter pipes according to the present invention;

[0040] Figure 13 This is an exploded structural diagram of the drilling mechanism of a reverse hole-forming device for small-diameter pipes according to the present invention.

[0041] Figure 14 This is a partial structural diagram of point B of the reverse hole forming device for small-diameter pipes according to the present invention;

[0042] Figure 15 This is a schematic cross-sectional view of a reverse hole-forming device for small-diameter pipes according to the present invention.

[0043] Figure 16 This is a schematic diagram of the rotating mechanism of a reverse hole-forming device for small-diameter pipes according to the present invention, which rotates at a certain angle.

[0044] In the diagram, 1 represents the basic structure; 101 represents the support plate.

[0045] 2. Support columns;

[0046] 3. Drilling and tapping machine; 301. Lifting mechanism; 302. Lifting shaft;

[0047] 4. Placement mechanism;

[0048] 41. Support component; 411. Vertical brace; 412. Load-bearing panel; 413. V-groove; 414. Support plate; 415. Slide rail;

[0049] 42. Limiting component; 421. First limiting plate; 422. Second limiting plate; 423. Clearance groove; 424. Rubber pad;

[0050] 43. Sliding component; 431. Butterfly block; 432. Fixing block; 433. First connecting block; 434. Second connecting block; 435. Connecting plate; 436. First slide block; 437. First slide groove; 438. Rack;

[0051] 44. First drive assembly; 441. Motor support frame; 442. First motor; 443. Mounting bracket; 444. First mounting strip; 445. Second mounting strip; 446. Gear; 447. Central shaft; 448. First transmission belt;

[0052] 45. Balancing assembly; 451. Second slide block; 452. Second slide groove; 453. Balancing block;

[0053] 46. ​​Covering assembly; 461. Cover plate;

[0054] 5. Drilling mechanism;

[0055] 51. Second drive assembly; 511. Motor mounting plate; 512. Second motor; 513. Mounting lug; 514. Drive shaft; 515. Driven shaft; 516. Second transmission belt;

[0056] 52. Drill frame assembly; 521. Upper mounting plate; 522. Lower mounting plate;

[0057] 53. Assembly / disassembly components; 531. Threaded connecting block; 532. Positioning frame; 533. Threaded hole; 534. Threaded groove; 535. Fixing bolt;

[0058] 54. Drilling assembly; 541. Drill bit; 542. Drill spindle;

[0059] 6. Rotating mechanism;

[0060] 61. Rotating component; 611. Protruding ring; 612. Concave ring;

[0061] 7. Positioning mechanism;

[0062] 71. Positioning component; 711. Disc; 712. Inner groove; 713. Locking block;

[0063] 72. Lifting assembly; 721. Cylinder; 722. Telescopic rod;

[0064] 73. Fixing component; 731. Fixing base; 732. Vertical bar; 733. Horizontal bar; Detailed Implementation

[0065] The technical solution of the present invention will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0066] like Figures 1-2 This invention specifically provides a reverse drilling device for the inner hole of a small-diameter pipe, including a base mechanism 1. The base mechanism 1 includes a support plate 101, a support column 2 fixedly mounted on the support plate 101, a drilling and tapping machine 3 fixedly mounted on the support column 2, the drilling and tapping machine 3 including a lifting mechanism 301, the lifting mechanism 301 including a lifting shaft 302, a placement mechanism 4 fixedly mounted on the support plate 101, a drilling mechanism 5 fixedly mounted above the placement mechanism 4 and below the lifting shaft 302, a rotating mechanism 6 at the bottom of the drilling mechanism 5 that allows the drilling mechanism 5 to rotate around the lifting shaft 302, and a positioning mechanism 7 below the rotating mechanism 6 that can control the rotation angle of the drilling mechanism 5.

[0067] Specifically, such as Figure 15 As shown, a drilling mechanism 5 is fixedly installed at the lower part of the lifting shaft 302. The drilling height of the drilling mechanism 5 can be adjusted up and down by the lifting shaft 302. The placement mechanism 4 is used to place the pipe. A rotating mechanism 6 is set at the bottom of the drilling mechanism 5, so that the drilling mechanism 5 can rotate relative to the lifting shaft 302. When drilling the inside of the pipe, the drilling mechanism 5 can be rotated out to the outside of the placement mechanism 4 first, so that the pipe can be smoothly fitted onto the drilling mechanism 5. After the fitting is completed, the drilling mechanism 5 and the pipe are rotated back to the top of the placement mechanism 4 through the rotating mechanism 6. At this time, the pipe is both fitted onto the drilling mechanism 5 and placed on the placement mechanism 4, so that the drilling mechanism 5 can drill the pipe from the inner wall direction. The positioning mechanism 7 is used to lock the angle after the drilling mechanism 5 has rotated to the position, so as to prevent the drilling mechanism 5 from rotating again. This structure effectively solves the problem of inconvenient pipe fitting caused by the blocking of the limiting component 42 of the placement mechanism 4, making the pipe feeding operation simpler and smoother, and improving the clamping efficiency and operation safety of reverse hole forming of small diameter pipes.

[0068] Furthermore, such as Figure 7 As shown, the placement mechanism 4 includes a support assembly 41 that is detachably mounted on the support plate 101 by bolts. The support assembly 41 includes two vertical supports 411 that are detachably mounted on the support plate 101 and are parallel to each other by bolts. The top of the two vertical supports 411 is welded to a bearing panel 412. A V-shaped groove 413 is opened in the middle of the bearing panel 412. Two support plates 414 are symmetrically arranged in the V-shaped groove 413. The upper ends of the two support plates 414 are welded to the opening edges of the corresponding V-shaped groove 413 of the bearing panel 412. The two support plates 414 are inclined downward and their lower ends meet and are welded together to form a V-shaped support structure for placing pipes.

[0069] Limiting components 42 are provided on the two support plates 414. The limiting components 42 include a first limiting plate 421 and a second limiting plate 422 respectively disposed at both ends of the V-shaped groove 413 and slidable along the length direction of the V-shaped groove 413. The second limiting plate 422 is disposed at one end near the lifting mechanism 301. The second limiting plate 422 is provided with a clearance groove 423 at the position corresponding to the drilling mechanism 5 to avoid interference with the drilling mechanism 5. A slide 415 is provided at the lower end junction of the two support plates 414 for sliding of the first limiting plate 421 and the second limiting plate 422. Rubber pads 424 are fixedly provided on the inner surface of the first limiting plate 421 and the second limiting plate 422.

[0070] Specifically, this placement mechanism 4 uses a V-shaped support structure composed of support plates 414 to prevent the pipe from rolling during drilling. A slide 415 is provided at the lower end junction of the two support plates 414 for the sliding of the first limiting plate 421 and the second limiting plate 422, providing space for the movement of the first limiting plate 421 and the second limiting plate 422, so as to facilitate the first limiting plate 421 and the second limiting plate 422 to restrict the position of the pipe.

[0071] Meanwhile, slide 415 can also serve as a chip outlet to promptly remove metal chips generated during drilling. After each drilling of the pipe, slide 415 needs to be cleaned by blowing air to prevent metal chips from remaining in slide 415 and affecting the normal sliding of the first limiting plate 421 and the second limiting plate 422 on slide 415, thereby affecting the machining accuracy.

[0072] Meanwhile, by setting a first limiting plate 421 and a second limiting plate 422 that can slide along the length direction of the V-groove 413, the position adjustment of the first limiting plate 421 and the second limiting plate 422 can accommodate pipes of a certain length range, realize axial limiting of both ends of the pipe, and prevent the pipe from moving during processing; by opening an avoidance groove 423 on the second limiting plate 422 near the drilling mechanism 5, the movement interference between the drilling mechanism 5 and the limiting plate during downward processing can be effectively avoided, ensuring smooth hole forming process and improving the applicability and processing stability of the device.

[0073] Furthermore, rubber pads 424 are fixedly installed on the inner surfaces of the first limiting plate 421 and the second limiting plate 422, which can play a flexible buffering and anti-slip protection role when axially limiting the pipe, avoiding indentation, scratches or deformation of the pipe end face caused by rigid contact; at the same time, it increases the friction between the pipe and the pipe, preventing the pipe from rotating or moving during processing, and further improving processing stability and finished product quality.

[0074] Furthermore, a sliding component 43 is fixedly provided at the bottom of both the first limiting plate 421 and the second limiting plate 422. The sliding component 43 provided at the bottom of the first limiting plate 421 is used to drive the first limiting plate 421 to move in the length direction of the slide rail 415, and the sliding component 43 provided at the bottom of the second limiting plate 422 is used to drive the second limiting plate 422 to move in the direction of the slide rail 415.

[0075] Furthermore, such as Figures 8-9 As shown, a first driving component 44 for driving the sliding component 43 to move is provided on one side of the sliding component 43, and a balancing component 45 for balancing its movement is provided on the other side of the sliding component 43.

[0076] Specifically, by setting a first drive component 44 on one side of the sliding component 43, stable driving and displacement control of the sliding component 43 can be achieved; and by setting a balance component 45 on the other side, the unilateral force on the drive side can be effectively offset, so that the sliding component 43 is subjected to balanced force and runs smoothly during the movement, avoiding the occurrence of off-center load, jamming or offset due to unilateral drive, ensuring smooth movement of the sliding component 43, and thus improving the overall operational stability and processing accuracy of the device.

[0077] Furthermore, such as Figure 8 As shown, the sliding component 43 includes a butterfly block 431 that can slide along the slide rail 415. The butterfly block 431 includes a fixing block 432 welded to the bottom of the first limiting plate 421. A first connecting block 433 and a second connecting block 434 are welded to the two sides of the fixing block 432, respectively.

[0078] Furthermore, such as Figure 6 , 10As shown, the first drive assembly 44 includes a motor support frame 441 welded to the inner side of the vertical support 411. A first motor 442 is mounted and supported on the motor support frame 441. A mounting frame 443 is welded to the lower part of the middle of the bearing panel 412 along the length direction. The mounting frame 443 includes a first mounting strip 444 and a second mounting strip 445 arranged in parallel. The upper ends of the first mounting strip 444 and the upper ends of the second mounting strip 445 are welded to the lower part of the bearing panel 412. A gear 446 is provided at the lower position between the first mounting strip 444 and the second mounting strip 445. A central shaft 447 is fixedly passed through the center of the gear 446. The central shaft 447 is rotatably connected to the first mounting strip 444 and the second mounting strip 445 respectively. The output shaft of the first motor 442 is connected to the central shaft 447 through a first transmission belt 448.

[0079] Specifically, the sliding component 43 adopts a butterfly block 431 structure, which is connected to the first limiting plate 421 through the fixing block 432. The first connecting block 433 and the second connecting block 434 are welded on both sides of the fixing block 432. The structure is stable and cooperates reliably with the slide rail 415, ensuring that the first limiting plate 421 slides smoothly.

[0080] The first drive assembly 44 stably supports and installs the first motor 442 through the motor support frame 441. By utilizing the cooperation of the mounting frame 443, gear 446, central shaft 447 and first transmission belt 448, the power of the motor is smoothly transmitted to the gear 446, providing reliable power to the sliding assembly 43 and realizing the displacement adjustment of the first limit plate 421.

[0081] Furthermore, the sliding assembly 43 also includes a connecting plate 435 welded to the lower part of the support panel 412. The lower end of the connecting plate 435 is welded with a first slide block 436 located at the upper position between the first mounting strip 444 and the second mounting strip 445. A first slide groove 437 is provided in the first slide block 436. The length of the first slide groove 437 is the same as the length of the support panel 412. The sliding assembly 43 also includes a rack 438. The upper part of the rack 438 engages with the first slide groove 437 and can slide along the first slide groove 437. The lower part of the rack 438 meshes with a gear 446.

[0082] Furthermore, the balancing assembly 45 includes a second slide block 451 fixedly disposed on the lower part of the inclined support plate 414. A second slide groove 452 is provided in the second slide block 451. The length of the first slide groove 437 is half the length of the support panel 412. A balancing block 453 is slidably disposed in the second slide groove 452, which can engage with the second slide groove 452 and slide along the second slide groove 452. The side of the first connecting block 433 facing away from the fixed block 432 is fixedly connected to the side of the rack 438. The upper surface of the second connecting block 434 is fixedly connected to the lower surface of the balancing block 453.

[0083] Specifically, the upper part of the rack 438 engages with the first groove 437 of the first slide block 436 and can slide along it, while the lower part meshes with the gear 446, forming a gear 446-rack 438 transmission engagement. This smoothly converts the rotational motion of the gear 446 into the linear movement of the rack 438. Since the side of the first connecting block 433 opposite to the fixed block 432 is fixedly connected to the side of the rack 438, the rack 438 will drive the first connecting block 433 to move when it makes a linear motion, thereby driving the first limiting plate 421 to move. The first groove 437 is set along the entire length of the bearing panel 412, which can effectively guide and limit the rack 438, preventing the rack 438 from shaking or swaying during movement.

[0084] Meanwhile, the balancing component 45, through the second slide groove 452 provided below the support plate 414 and in conjunction with the slidable balancing block 453, forms a symmetrical double-sided guide structure with the rack 438 on the drive side and the first slide groove 437. The balancing block 453 is fixedly connected to the butterfly block 431 through the second connecting block 434 and can move synchronously with the sliding component 43, effectively counteracting the eccentric force generated by the drive of the single-sided gear 446 and rack 438, so that the first limiting plate 421 is subjected to balanced force and moves smoothly during the movement, avoiding jamming or tilting.

[0085] It should be noted that the first limiting plate 421 and the second limiting plate 422 are respectively provided with a sliding component 43 and a balancing component 45 with the same structure. The two sets of sliding components 43 and balancing components 45 are symmetrically arranged on both sides of the slide rail 415. Their structural composition and working principle are the same, and they are all used to realize the sliding adjustment and motion balance of the corresponding limiting plates.

[0086] Furthermore, the placement mechanism 4 also includes a cover assembly 46, which includes a cover plate 461 that covers the outside of the first drive assembly 44 to block flying debris. The two ends of the cover plate 461 are detachably connected to two vertical supports 411 respectively, and the upper end of the cover plate 461 is detachably connected to the support panel 412.

[0087] Specifically, such as Figure 4 As shown, the cover assembly 46 reduces the amount of metal chips and dust generated during drilling that enter the transmission components such as gear 446 and rack 438 by providing a cover plate 461 on the outside of the first drive assembly 44.

[0088] Meanwhile, the cover plate 461 is detachably connected to the vertical support 411 and the load-bearing panel 412, which facilitates quick disassembly and assembly of the cover plate 461 during device maintenance. This allows for easy inspection, cleaning of chips, and lubrication and maintenance of internal transmission components such as gears 446, racks 438, and transmission belts. The detachable structure also facilitates the replacement and repair of components in the future, reducing the difficulty of device maintenance and improving ease of use and equipment durability.

[0089] It should be noted that during use, the cover plate 461 needs to be removed every certain period of use to clean and maintain the internal mechanism in order to ensure the normal operation of the equipment.

[0090] Furthermore, such as Figure 4 As shown, the drilling mechanism 5 includes a drilling assembly 54 for drilling, a drill frame assembly 52 for mounting the drilling assembly 54, a second drive assembly 51 for driving the drilling assembly 54 to perform drilling, and a disassembly assembly 53 for enabling the drill frame assembly 52 to be detachably connected.

[0091] Specifically, by modularizing the drilling mechanism 5 into a drilling assembly 54, a drill frame assembly 52, a second drive assembly 51, and a disassembly and assembly assembly 53, the division of labor among the components is clear and the structural layout is reasonable. The second drive assembly 51 can provide stable power to the drilling assembly 54, ensuring reliable drilling. The disassembly and assembly assembly 53 enables the detachable connection of the drill frame assembly 52, facilitating timely inspection, maintenance, and replacement of the components in the drill frame assembly 52, thereby improving the maintenance convenience of the device.

[0092] Furthermore, such as Figures 11-12 As shown, the second drive assembly 51 includes a motor mounting plate 511 fixedly disposed at the lower end of the lifting shaft 302. A second motor 512 is disposed below the motor mounting plate 511. Mounting ears 513 are fixedly disposed at both ends of the top surface of the second motor 512. The second motor 512 is bolted to the motor mounting plate 511 through the mounting ears 513.

[0093] Specifically, the second motor 512 is bolted to the motor mounting plate 511 via mounting ears 513, ensuring a secure and reliable installation that is easy to install and remove.

[0094] Furthermore, such as Figures 13-14 As shown, the drill frame assembly 52 includes an upper mounting plate 521 and a lower mounting plate 522 arranged parallel to and below the upper mounting plate 521. One end of the upper mounting plate 521 passes through the drive shaft 514 of the motor, is rotatably connected to the drive shaft 514 and engaged to limit its movement, preventing the upper mounting plate 521 from sliding down. The other end of the upper mounting plate 521 is provided with a driven shaft 515. The upper mounting plate 521 passes through the driven shaft 515, is rotatably connected to the driven shaft 515 and engaged to limit its movement, preventing the upper mounting plate 521 from sliding down along the driven shaft 515. The two ends of the lower mounting plate 522 are rotatably connected to the drive shaft 514 and the driven shaft 515, respectively. The drive shaft 514 and the driven shaft 515 are connected by a second transmission belt 516.

[0095] Specifically, the drill frame assembly 52 adopts an upper mounting plate 521 and a lower mounting plate 522 arranged in parallel, which, together with the active rotating shaft 514 and the driven rotating shaft 515, form a stable frame structure with good overall rigidity and reliable support. The upper mounting plate 521 is rotatably connected to the active rotating shaft 514 and the driven rotating shaft 515, and the locking limit is used to effectively prevent the upper mounting plate 521 from slipping axially and ensure the stability of the transmission structure. The active rotating shaft 514 and the driven rotating shaft 515 are synchronously transmitted through the second transmission belt 516, and the power transmission is smooth, which can ensure that the drilling assembly 54 operates evenly, reduce processing vibration, and thus improve the processing accuracy and surface quality of the inner hole of small diameter pipes.

[0096] Furthermore, the disassembly and assembly component 53 includes a threaded connecting block 531 welded to the lower surface of the upper mounting plate 521 and a positioning frame 532 welded to the upper surface of the lower mounting plate 522. The positioning frame 532 corresponds to the position of the threaded connecting block 531 and can be sleeved on the outside of the threaded connecting block 531. The lower mounting plate 522 has a threaded hole 533 at the position corresponding to the positioning frame 532, and the threaded connecting block 531 has a threaded groove 534 at the position corresponding to the threaded hole 533. The lower mounting plate 522 and the upper mounting plate 521 are fixedly connected by fixing bolts 535 passing through the threaded hole 533 and the threaded groove 534. Loosening the fixing bolts 535 can release the fixation between the lower mounting plate 522 and the upper mounting plate 521, realizing the quick disassembly and assembly of the drill frame component 52.

[0097] Specifically, the assembly / disassembly component 53 achieves quick alignment by interlocking the positioning frame 532 and the threaded connecting block 531, and the upper mounting plate 521 and the lower mounting plate 522 are detachably connected by the fixing bolts 535, making assembly convenient; the lower mounting plate 522 can be quickly removed by loosening the bolts, which facilitates the replacement, inspection and maintenance of the drilling component 54, effectively simplifying the disassembly and assembly steps, shortening maintenance time, and improving the flexibility and maintenance efficiency of the device.

[0098] Furthermore, the drilling assembly 54 includes a drill spindle 542 fixedly connected to the lower end of the driven shaft 515, and a drill bit 541 fixedly connected to the lower end of the drill spindle 542.

[0099] Specifically, the drilling assembly 54 adopts a structure in which the drill spindle 542 and the drill bit 541 are directly fixedly connected. The drill spindle 542 and the drill bit 541 are directly driven to rotate by the driven shaft 515. The transmission chain is short and the power transmission is direct, which can effectively reduce transmission loss and operating vibration, and ensure that the drill bit 541 rotates smoothly and has high concentricity.

[0100] Furthermore, such as Figure 5As shown, the rotating mechanism 6 includes a rotating component 61, which includes a convex ring 611 fixedly disposed on the outer edge of the lower surface of the second motor 512. A concave ring 612 is provided on the upper surface of the upper mounting plate 521 corresponding to the convex ring 611. The drilling mechanism 5 can rotate along the convex ring 611 through the cooperation between the concave ring 612 and the convex ring 611.

[0101] Specifically, the convex ring 611 and the concave ring 612 cooperate to form a guide rotation structure. When the drilling mechanism 5 is turned by hand, the drilling mechanism 5 can rotate smoothly around the active rotating shaft 514 of the second motor 512.

[0102] Furthermore, the positioning mechanism 7 includes a positioning component 71 for controlling the rotation angle of the drilling mechanism 5. The positioning component 71 includes a disc 711 fixedly disposed on the lower bottom surface of the lower mounting plate 522 and corresponding to the position of the active rotating shaft 514. The disc 711 has an inner groove 712. The positioning component 71 also includes a locking block 713 that engages with the inner groove 712.

[0103] Specifically, the positioning component 71, through the engagement of the disc 711 and the locking block 713, can limit and position the rotation angle of the drilling mechanism 5, ensuring that the drilling mechanism 5 can be reliably locked after rotating to the set position, and preventing deviation or rotation during drilling operations; the engagement structure of the groove and the locking block 713 is simple and the positioning is stable.

[0104] It should be noted that the groove is a polygonal groove, and the locking block 713 is a corresponding polygonal locking block 713, which can form an effective limit and can relatively accurately control the rotation angle of the drilling mechanism 5.

[0105] Furthermore, the positioning mechanism 7 also includes a lifting assembly 72 for lifting the locking block 713 so that the locking block 713 is engaged in the inner groove 712, and a fixing assembly 73 for fixing the lifting assembly 72 to the drilling machine 3. The fixing assembly 73 includes a fixing seat 731 detachably disposed on the bottom surface of the drilling machine 3. A vertical rod 732 is welded to the lower part of the fixing seat 731, and a horizontal rod 733 is welded to the bottom end of the vertical rod 732. The lifting assembly 72 includes a cylinder 721 welded to the horizontal rod 733 and located below the drilling mechanism 5. The locking block 713 is welded to the top of the telescopic rod 722 of the cylinder 721.

[0106] Specifically, the fixed base 731, vertical rod 732, and horizontal rod 733 form a stable support structure, providing a reliable installation base for the lifting assembly 72 and ensuring sufficient rigidity of the overall positioning mechanism 7. The cylinder 721 drives the locking block 713 to move up and down, and can control the engagement or disengagement of the locking block 713 with the groove of the disc 711. The positioning and locking of the drilling mechanism 5 can be achieved by driving the cylinder 721, which can improve the positioning efficiency, avoid the drill bit 541 from shaking and shifting during processing, and further improve the drilling accuracy.

[0107] It is worth noting that the length of the pipe processed by this device is less than the distance between the first limiting plate 421 and the second limiting plate 422 when the first limiting plate 421 and the second limiting plate 422 are located at both ends of the slide 415.

[0108] The inner diameter of the pipe processed by this device is greater than the distance from the bottom of the drill bit 541 to the upper surface of the mounting plate 521, meaning the pipe can pass through the drilling mechanism 5 for nested processing. At the same time, the inner diameter of the pipe should not be too large, ensuring that the first limiting plate 421 and the second limiting plate 422 can effectively limit it, and that the V-groove 413 can stably support the pipe to ensure reliable positioning and stable placement during processing. The specific dimensions can be flexibly adjusted and determined according to the working conditions during actual production and processing.

[0109] The specific work process for this application is as follows:

[0110] In the initial state, the cylinder 721 of the lifting assembly 72 has its telescopic rod 722 extended, the drilling mechanism 5 is fixed, and the drill bit 541 is aligned with the center line of the long side of the slide rail 415.

[0111] During feeding, cylinder 721 retracts telescopic rod 722, such as Figure 16 As shown, the drilling mechanism 5 is manually moved at a certain angle to offset it from directly above the placement mechanism 4, making it easier to fit the pipe onto the outside of the drilling mechanism 5. After the pipe is fitted, the drilling mechanism 5 and the pipe are manually reset to their initial positions. The telescopic rod 722 of the cylinder 721 extends again, and the locking block 713 engages upward into the polygonal groove of the disc 711, locking the drilling mechanism 5 in place and preventing it from rotating during processing. With the help of the cooperation structure between the polygonal groove and the locking block 713, the drill bit 541 is aligned with the center line of the long side of the slide 415 after it is engaged.

[0112] According to the preset hole positions on the pipe, align the part to be drilled with the drill bit 541, and then control the drive assembly of the first limiting plate 421 and the second limiting plate 422 to move, causing the first limiting plate 421 to move along the slide 415 and contact one end of the pipe, and the second limiting plate 422 to move and abut against the other end of the pipe. Figure 3 As shown, this achieves axial clamping and positioning of the pipe.

[0113] During processing, the lifting shaft 302 of the drilling machine 3 drives the overall drilling mechanism 5 to move down, the second motor 512 of the second drive assembly 51 starts, and drives the driven shaft 515 to rotate through the active rotating shaft 514 and the second transmission belt 516, thereby driving the drill shaft 542 and the drill bit 541 to rotate at high speed to complete the drilling of the pipe.

[0114] When maintenance is required on the drilling assembly 54, the fixing bolts 535 of the disassembly assembly 53 can be loosened to disconnect the upper mounting plate 521 from the lower mounting plate 522, thereby enabling quick disassembly and assembly of the drilling frame assembly 52.

[0115] During the processing, the cover plate 461 of the cover assembly 46 can reduce the impact of metal chips and dust on the operation of the transmission components. After the device has been running for a period of time, the cover plate 461 can be removed to clean, lubricate and maintain the internal gears 446, racks 438 and other mechanisms.

[0116] The above description shows and illustrates the basic principles, main features, and advantages of the present invention. Standard parts used in the present invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment adopt conventional models in the prior art, which will not be described in detail here.

[0117] The control method of this invention is to control the device by manually starting and stopping the switch. The wiring diagram of the power element and the supply of power are common knowledge in the field. Since this invention is mainly used to protect mechanical devices, the control method and wiring layout will not be explained in detail.

[0118] The control method of this invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Furthermore, since this invention is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.

[0119] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A reverse drilling device for small-diameter pipe inner holes, comprising a base mechanism (1), the base mechanism (1) comprising a support plate (101), a support column (2) fixedly disposed on the support plate (101), a drilling and tapping machine (3) fixedly disposed on the support column (2), the drilling and tapping machine (3) comprising a lifting mechanism (301), the lifting mechanism (301) comprising a lifting shaft (302), characterized in that: A placement mechanism (4) is also fixedly installed on the support plate (101). A drilling mechanism (5) is fixedly installed above the placement mechanism (4) at the lower part of the lifting shaft (302). A rotating mechanism (6) is installed at the bottom of the drilling mechanism (5) to allow the drilling mechanism (5) to rotate around the lifting shaft (302). A positioning mechanism (7) is installed below the rotating mechanism (6) to control the rotation angle of the drilling mechanism (5).

2. The reverse hole-forming device for small-diameter pipe inner bore according to claim 1, characterized in that: The placement mechanism (4) includes a support component (41) fixedly mounted on the support plate (101). The support component (41) includes two vertical supports (411) fixedly mounted on the support plate (101) and parallel to each other. A bearing panel (412) is fixedly mounted at the top of the two vertical supports (411). A V-shaped groove (413) is opened in the middle of the bearing panel (412). Two support plates (414) are symmetrically arranged in the V-shaped groove (413). The upper ends of the two support plates (414) are fixedly connected to the opening edges of the corresponding V-shaped groove (413) of the bearing panel (412). The two support plates (414) are inclined downward and their lower ends intersect each other, forming a V-shaped support structure for placing pipes. Limiting components (42) are provided on the two support plates (414). The limiting components (42) include a first limiting plate (421) and a second limiting plate (422) respectively disposed at both ends of the V-shaped groove (413) and slidable along the length direction of the V-shaped groove (413). The second limiting plate (422) is disposed at one end near the lifting mechanism (301). The second limiting plate (422) is provided with a clearance groove (423) at the position corresponding to the drilling mechanism (5) to avoid interference with the drilling mechanism (5). A slide (415) for sliding the first limiting plate (421) and the second limiting plate (422) is provided at the junction of the lower ends of the two support plates (414). Rubber pads (424) are fixedly provided on the inner surface of the first limiting plate (421) and the second limiting plate (422).

3. The reverse hole-forming device for small-diameter pipe inner bore according to claim 2, characterized in that: The bottom of the first limiting plate (421) and the second limiting plate (422) are both fixedly provided with sliding components (43). One side of the sliding component (43) is provided with a first driving component (44) for driving its movement, and the other side of the sliding component (43) is provided with a balancing component (45) for balancing its movement.

4. The reverse hole-forming device for small-diameter pipe inner bore according to claim 3, characterized in that: The sliding component (43) includes a butterfly block (431), which includes a fixing block (432) fixedly disposed at the bottom of the first limiting plate (421). A first connecting block (433) and a second connecting block (434) are fixedly disposed on both sides of the fixing block (432). The first drive assembly (44) includes a motor support frame (441) fixedly disposed inside the vertical support (411). A first motor (442) is mounted and supported on the motor support frame (441). A mounting frame (443) is fixedly disposed below the middle part of the bearing panel (412) along the length direction. The mounting frame (443) includes a first mounting strip (444) and a second mounting strip (445) arranged in parallel. The upper ends of the first mounting strip (444) and the second mounting strip (445) are fixedly connected to the lower part of the bearing panel (412). A gear (446) is disposed at the lower position between the first mounting strip (444) and the second mounting strip (445). A central shaft (447) is fixedly passed through the center of the gear (446). The central shaft (447) is rotatably connected to the first mounting strip (444) and the second mounting strip (445) respectively. The output shaft of the first motor (442) is connected to the central shaft (447) through a first transmission belt (448).

5. The reverse hole-forming device for small-diameter pipe inner bore according to claim 4, characterized in that: The sliding assembly (43) further includes a connecting plate (435) fixedly disposed at the lower part of the bearing panel (412). The lower end of the connecting plate (435) is fixedly disposed with a first slide block (436) located at the upper position between the first mounting strip (444) and the second mounting strip (445). A first slide groove (437) is provided in the first slide block (436). The length of the first slide groove (437) is the same as the length of the bearing panel (412). The sliding assembly (43) further includes a rack (438). The upper part of the rack (438) engages with the first slide groove (437) and can slide along the first slide groove (437). The lower part of the rack (438) meshes with a gear (446). The balancing assembly (45) includes a second slide (451) fixedly disposed at the lower part of the inclined support plate (414), a second slide groove (452) is provided in the second slide (451), the length of the first slide groove (437) is half the length of the support panel (412), a balancing block (453) is slidably disposed in the second slide groove (452) and its upper part can engage with the second slide groove (452) and slide along the second slide groove (452), the side of the first connecting block (433) facing away from the fixed block (432) is fixedly connected to the side of the rack (438), and the upper surface of the second connecting block (434) is fixedly connected to the lower surface of the balancing block (453); The placement mechanism (4) further includes a cover assembly (46), which includes a cover plate (461) covering the outside of the first drive assembly (44) for blocking flying debris. The two ends of the cover plate (461) are detachably connected to two vertical supports (411), and the upper end of the cover plate (461) is detachably connected to the bearing panel (412).

6. The reverse hole-forming device for small-diameter pipe inner bore according to claim 5, characterized in that: The drilling mechanism (5) includes a drilling assembly (54) for drilling, a drill frame assembly (52) for mounting the drilling assembly (54), a second drive assembly (51) for driving the drilling assembly (54) to drill, and a disassembly assembly (53) for detaching the drill frame assembly (52).

7. The reverse hole-forming device for small-diameter pipe inner bore according to claim 6, characterized in that: The second drive assembly (51) includes a motor mounting plate (511) fixedly disposed at the lower end of the lifting shaft (302). A second motor (512) is disposed below the motor mounting plate (511). Mounting ears (513) are fixedly disposed at both ends of the top surface of the second motor (512). The second motor (512) is bolted to the motor mounting plate (511) through the mounting ears (513). The drill frame assembly (52) includes an upper mounting plate (521) and a lower mounting plate (522) arranged parallel to and below the upper mounting plate (521). One end of the upper mounting plate (521) passes through the drive shaft (514) of the second motor (512), and is rotatably connected to and engaged with the drive shaft (514) to prevent the upper mounting plate (521) from sliding down. The other end of the upper mounting plate (521) is provided with a driven shaft (514). 5) The upper mounting plate (521) passes through the driven rotating shaft (515), is rotatably connected to the driven rotating shaft (515), and is engaged and limited to prevent the upper mounting plate (521) from sliding down along the driven rotating shaft (515). The two ends of the lower mounting plate (522) are rotatably connected to the driving rotating shaft (514) and the driven rotating shaft (515) respectively. The driving rotating shaft (514) and the driven rotating shaft (515) are connected by a second transmission belt (516). The disassembly and assembly assembly (53) includes a threaded connecting block (531) fixedly disposed on the lower surface of the upper mounting plate (521) and a positioning frame (532) fixedly disposed on the upper surface of the lower mounting plate (522). The positioning frame (532) corresponds to the position of the threaded connecting block (531) and can be sleeved on the outside of the threaded connecting block (531). The lower mounting plate (522) has a threaded hole (533) at the position corresponding to the positioning frame (532), and the threaded connecting block (531) has a threaded groove (534) at the position corresponding to the threaded hole (533). The lower mounting plate (522) and the upper mounting plate (521) are fixedly connected by fixing bolts (535) passing through the threaded hole (533) and the threaded groove (534). Loosening the fixing bolts (535) can release the fixation between the lower mounting plate (522) and the upper mounting plate (521), thereby realizing the quick disassembly and assembly of the drill frame assembly (52). The drilling assembly (54) includes a drill shaft (542) fixedly connected to the lower end of a driven shaft (515), and a drill bit (541) is fixedly connected to the lower end of the drill shaft (542).

8. The reverse hole-forming device for small-diameter pipe inner bore according to claim 7, characterized in that: The rotating mechanism (6) includes a rotating component (61), which includes a convex ring (611) fixedly disposed on the outer edge of the lower surface of the second motor (512). A concave ring (612) is provided on the upper surface of the upper mounting plate (521) corresponding to the convex ring (611). The drilling mechanism (5) can rotate along the convex ring (611) through the cooperation of the concave ring (612) and the convex ring (611).

9. The reverse hole-forming device for small-diameter pipe inner bore according to claim 8, characterized in that: The positioning mechanism (7) includes a positioning component (71) for controlling the rotation angle of the drilling mechanism (5). The positioning component (71) includes a disc (711) fixedly disposed on the bottom surface of the lower mounting plate (522) and corresponding to the position of the active rotating shaft (514). The disc (711) has an inner groove (712). The positioning component (71) also includes a locking block (713) that engages with the inner groove (712).

10. The device for reverse hole forming of small-diameter pipe inner bore according to claim 9, characterized in that: The positioning mechanism (7) further includes a lifting assembly (72) for lifting the locking block (713) so that the locking block (713) is locked into the inner groove (712), and a fixing assembly (73) for fixing the lifting assembly (72) to the drilling machine (3). The fixing assembly (73) includes a fixing seat (731) fixedly installed on the bottom surface of the drilling machine (3). A vertical rod (732) is fixedly installed on the lower part of the fixing seat (731). A horizontal rod (733) is fixedly connected to the bottom end of the vertical rod (732). The lifting assembly (72) includes a cylinder (721) fixedly installed on the horizontal rod (733) and located below the drilling mechanism (5). The locking block (713) is fixedly installed at the top of the telescopic rod (722) of the cylinder (721).

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