A kind of drilling device for processing water sprinkling vehicle brake disc

Abstract

The application relates to a drilling device for processing a brake disc of a watering cart, and belongs to the technical field of brake disc drilling devices. The drilling device comprises a workbench, a positioning boss is arranged on the workbench, a positioning column is arranged above the positioning boss, a pressing plate is connected to the bottom of the positioning column, elastic positioning pieces are arranged between the pressing plate and the positioning boss, the elastic positioning pieces comprise two coaxial connecting rings arranged in an upper-lower interval and a plurality of arc-shaped elastic pieces connected between the two connecting rings, the inner concave side of the arc-shaped elastic piece faces the middle part of the connecting ring, the edge of the positioning column is provided with a containing groove, a supporting seat is installed in the containing groove, a limiting block is elastically and slidingly installed on the supporting seat in the radial direction of the positioning column, a movable piece is slidingly arranged in the middle part of the positioning column in the up-down direction, an elastic piece is connected between the movable piece and the positioning column, and the movable piece comprises a pushing block. The application can better clamp and fix the brake disc, and can avoid deformation and surface damage of the brake disc caused by clamping.

Description

Technical Field

[0001] This invention relates to the field of brake disc drilling equipment, and more particularly to a drilling equipment for processing brake discs of sprinkler trucks. Background Technology

[0002] Water sprinkler trucks are heavy-duty special-purpose vehicles, typically characterized by high weight, heavy load, frequent starts and stops, and relatively low speeds but complex operating conditions. Therefore, their braking systems require strong braking force, excellent heat dissipation, and outstanding durability. As the component in the braking system that directly rubs against the brake pads to generate braking force, the performance of the brake disc is crucial.

[0003] Machining mounting holes on the brake disc is one of the most critical and precision-required steps in brake disc manufacturing. It directly affects the installation and positioning of the wheel and driving safety, and this operation requires a high degree of expertise in equipment, fixtures, and techniques.

[0004] Patent CN214720801U discloses a high-efficiency heat dissipation brake disc drilling device, including a working round table with a clamping platform on the working round table. A support platform is fixedly connected to the top of the clamping platform, and the brake disc body is clamped on the top of the support platform. A through groove is opened inside the clamping platform and the support platform. A clamping arm is hinged to the surface of the support platform at both edges of the through groove via a hinge seat. A pad is fixedly connected to one end of the clamping arm that extends into the through groove. A support ring is movably connected to the top of the two pads. The top of the support ring is movably connected to the top of the brake disc body. A clamping protrusion is fixedly connected to the end of the clamping arm away from the pad. The opposite side of the two clamping protrusions is engaged with the surface of the brake disc body.

[0005] The drilling device uses the brake disc's own weight to press the support ring downwards, pushing the pad downwards and causing the clamping arm to rotate, thereby clamping the protrusion to fix the brake disc body. However, for ventilated brake discs, the internal air channels at the edge of the brake disc provide airflow, resulting in a relatively weak structure. If the aforementioned drilling device is used to clamp and fix a ventilated brake disc, the edge of the brake disc is easily damaged and deformed by downward pressure, affecting the quality of the brake disc. Summary of the Invention

[0006] This invention provides a drilling device for processing brake discs of sprinkler trucks, in order to solve the technical problem in the prior art where the weak edges of the ventilated disc sprinkler truck brake disc are clamped from top to bottom during the drilling process, which easily leads to deformation of the brake disc edges and affects the quality of the brake disc.

[0007] To solve the above problems, the present invention provides a drilling device for machining brake discs of sprinkler trucks, which adopts the following technical solution:

[0008] A drilling device for processing brake discs of sprinkler trucks includes a worktable with a positioning boss on the worktable. A positioning post for passing through the inner hole of the brake disc is provided above the positioning boss. A pressure plate is connected to the bottom of the positioning post. An elastic positioning element is provided between the pressure plate and the positioning boss. The elastic positioning element includes two coaxial connecting rings arranged at intervals and multiple arc-shaped elastic elements uniformly connected between the two connecting rings. The concave side of the arc-shaped elastic element faces the middle of the connecting ring.

[0009] The edge of the positioning column is provided with a receiving groove, and a support seat that can slide up and down elastically is installed in the receiving groove. A limit block is elastically installed on the support seat along the radial direction of the positioning column. A movable part is slidably installed in the middle of the positioning column in the vertical direction. An elastic element is connected between the movable part and the positioning column. The movable part includes a push block, and the push block is provided with a push slope. The push block and the positioning column are engaged in vertical stop cooperation.

[0010] The bottom of the movable part slides through the positioning boss. A one-way locking structure is provided between the movable part and the positioning boss. The one-way locking structure is used to prevent the movable part from moving upward. A moving drive mechanism is provided on the side of the worktable to drive the movable part to move downward. When the movable part is driven downward, the limiting block is pushed by the pushing inclined surface and moves to the outside of the positioning column. Then, it presses the brake disc onto the positioning boss from top to bottom. The two connecting rings approach each other, so that the arc-shaped elastic element bends and is supported on the inner wall of the brake disc.

[0011] Using the above technical solution, the brake disc to be processed is fitted onto the outside of the positioning post. When the moving part moves downward, the limiting block is first pushed to the outside of the positioning post by the pushing inclined surface on the pushing block. Then, the positioning post is pushed downward by the pushing block and moves downward. The limiting block presses the brake disc onto the positioning boss from top to bottom. The arc-shaped elastic element is compressed and deforms, pressing against the inner wall of the brake disc, thus supporting the brake disc and keeping it fixed in position on the positioning boss. Multiple arc-shaped elastic elements support the brake disc from the inside out. The arc-shaped elastic elements do not exert direct downward pressure on the area of ​​the brake disc with venting channels. Compared with the existing technology of clamping the outer edge of the brake disc from top to bottom to fix the brake disc, this method can avoid deformation of the outer edge of the brake disc. Furthermore, the fixing method of supporting the brake disc from the inside out provides a more reliable fixation of the brake disc and can also reduce the space occupied on the outside of the brake disc. The limiting block is inserted into the support base, which can slide elastically up and down. This allows the limiting block to press the brake disc in an elastic manner in the vertical direction, thus avoiding damage to the surface of the brake disc.

[0012] The downward movement of the moving part simultaneously positions the brake disc vertically and clamps it circumferentially. This positioning and clamping process is simpler. The elastic positioning element is independently mounted on the positioning boss for easy disassembly. If the elastic positioning element deforms or becomes damaged after long-term use, it can be removed and replaced to ensure the positioning accuracy of the brake disc. A one-way locking structure ensures that the moving part is automatically locked in position after it has moved into place, eliminating the need for the moving drive mechanism to remain constantly active to keep the moving part in that position.

[0013] Furthermore, the one-way locking structure includes a toothed plate that is elastically slidably mounted on the positioning boss in the horizontal direction. The toothed plate has a locking tooth on the side facing the center of the positioning boss, and a pushing slope is provided on the top of the side of the locking tooth facing the center of the positioning boss. The movable part has a plurality of slots arranged vertically and horizontally on the side wall facing the toothed plate. When the movable part moves down to the position of the locking tooth corresponding to the slot, the locking tooth can be inserted into the slot.

[0014] Using the above technical solution, the movable part can push open the locking teeth and toothed plate by pushing the inclined surface, so as to slide smoothly downward in the positioning column. When the movable part moves down to the predetermined position, the locking teeth and the slots are aligned, and the locking teeth are inserted into the slots to lock the movable part, so that the movable part can no longer move upward.

[0015] Furthermore, the bottom end of the toothed plate is connected to a push block, which is located below the worktable. The push block has a push ramp. The bottom end of the movable part extends to the bottom of the worktable, and the bottom end of the movable part is elastically slidably connected to an unlocking structure in the vertical direction. The unlocking structure includes a trigger block and an unlocking ring connected above the trigger block. The side of the worktable is also provided with an unlocking trigger structure for pushing the trigger block upward. When the trigger block moves upward, the top edge of the unlocking ring contacts the push ramp, and pushes the push block through the push ramp to drive the toothed plate to move away from the movable part, so that the toothed plate disengages from the slot and unlocks.

[0016] Using the above technical solution, the unlocking trigger structure drives the trigger block to move upward, which in turn causes the trigger block to move the unlocking ring upward. The unlocking ring pushes the push block, causing the toothed plate to move away from the moving part, thereby unlocking the one-way locking structure. The unlocking method is simple and the structure is straightforward.

[0017] Furthermore, the worktable is rotatable around its central axis, and there is a gap between the positioning boss and the center of the worktable. The sides of the worktable are arranged in sequence around its circumference as a loading station, a clamping and positioning station, and a drilling station. The moving drive mechanism is located at the clamping and positioning station, and the unlocking trigger structure is located at the loading station.

[0018] Using the above technical solution, the worktable rotates and drives the positioning boss to pass through each station in sequence to complete the loading, positioning and drilling process of the brake disc. Each station is independent of each other, which makes it easy to complete the corresponding processing at each independent station, and the operating space is more spacious.

[0019] Furthermore, the unlocking trigger structure includes a bending plate, which includes a sloping plate segment that tilts upwards along the rotation direction of the worktable. When the trigger block rotates to the loading station as the worktable rotates, it contacts the sloping plate segment and is pushed upwards by the sloping plate segment.

[0020] Using the above technical solution, the trigger block is lifted upward by the inclined plate section as the worktable rotates and passes through it. There is no need to set up a drive mechanism to drive the trigger block to move upward, which can save power costs.

[0021] Furthermore, the positioning boss is rotatably mounted on the worktable around its central axis. A chip removal station is provided between the drilling station and the loading station. A rotary drive mechanism is provided at the chip removal station. The rotary drive mechanism is used to drive the positioning boss to rotate, so that the chips generated by drilling are thrown off the brake disc under centrifugal force.

[0022] Using the above technical solution, when the brake disc moves to the chip removal station, the rotary drive mechanism drives the positioning boss to rotate the brake disc, causing the chips that fall on the brake disc during drilling to be thrown out, making the surface of the brake disc cleaner, and no further cleaning is required after the brake disc is removed.

[0023] Furthermore, the chip removal station is also equipped with a chip baffle and a lifting mechanism. The chip baffle is connected to the lifting output end of the lifting mechanism. The lifting mechanism is used to drive the chip baffle to move up and down so that the chip baffle is positioned outside the positioning boss during the chip removal process, and to drive the chip baffle to move above the positioning boss after the chip removal is completed.

[0024] By adopting the above technical solution and setting up a chip shield, the chips that are thrown out are confined within the range of the chip shield, preventing the chips from being thrown to other workstations and affecting the operations at other workstations.

[0025] Furthermore, the moving drive mechanism includes a lifting cylinder and a push plate, the push plate being connected to the drive output end of the lifting cylinder, and the push plate being located above the movable part that has rotated to the clamping and positioning station.

[0026] Furthermore, a cleaning mechanism is installed on the workbench. The cleaning mechanism includes an air outlet duct that is movably installed in the middle of the workbench and an air outlet cap connected to the top of the air outlet duct. The air outlet duct can rotate around its own axis. The air outlet cap has multiple air outlet channels that are connected to the air outlet duct and are evenly distributed around the axis of the air outlet duct. The outer ends of the air outlet channels are inclined downwards.

[0027] By adopting the above technical solution, by setting an air outlet channel with the outer end tilted downward on the air outlet cap, the exhaust air is guided to blow from top to bottom onto the workbench surface, and the air outlet duct moves up and down back and forth with the air outlet cap. At the same time, the air outlet duct rotates, so that the intersection of the blown air and the workbench surface can move to various positions on the workbench, thereby thoroughly cleaning the space above the workbench.

[0028] Furthermore, the loading station, clamping and positioning station, drilling station, and chip removal station are evenly distributed around the worktable, and four sets of positioning bosses are evenly installed on the worktable along the circumference of the worktable.

[0029] By adopting the above technical solution, feeding, clamping and positioning, drilling and chip removal can be carried out simultaneously, which can improve production efficiency.

[0030] The beneficial effects of the drilling device for processing water truck brake discs provided by this invention are as follows: This invention uses an arc-shaped elastic element to tighten the brake disc from the inside out to achieve fixation of the brake disc. Compared with fixing the brake disc by clamping the edge of the brake disc from top to bottom, this method can avoid deformation and damage at the weaker edges of the brake disc when processing ventilated disc brake discs. This invention provides a better fixing effect for the brake disc. By setting up a chip removal station, chips that fall onto the brake disc can be removed in time after drilling. By setting up a cleaning mechanism, the space above the worktable can be thoroughly cleaned at the end of processing. Attached Figure Description

[0031] Figure 1 A three-dimensional structural schematic diagram of a drilling device for machining a water sprinkler truck brake disc provided by the present invention;

[0032] Figure 2 A front view of a drilling device for machining a water truck brake disc provided by the present invention;

[0033] Figure 3 Right view of a drilling device for machining a water sprinkler truck brake disc provided by the present invention;

[0034] Figure 4 A front view of the positioning boss in a drilling device for machining a water truck brake disc provided by the present invention;

[0035] Figure 5 A cross-sectional view of the positioning boss in a drilling device for machining a water truck brake disc provided by the present invention.

[0036] Figure 6 for Figure 5 Enlarged structural diagram at point A;

[0037] Figure 7A three-dimensional structural diagram of the elastic positioning component in a drilling device for machining a water truck brake disc provided by the present invention;

[0038] Figure 8 A three-dimensional structural diagram of the positioning post in a drilling device for machining a water truck brake disc provided by the present invention;

[0039] Figure 9 A three-dimensional structural diagram of the limiting block and support seat in a drilling device for machining a water truck brake disc provided by the present invention.

[0040] Figure 10 This is a cross-sectional view of the air outlet cap in a drilling device for machining a water truck brake disc provided by the present invention.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Drilling machine; 101. Support platform; 102. Drill bit; 2. Worktable; 3. Positioning boss; 301. Support; 302. Shaft; 303. Internal groove; 304. Circular protrusion; 4. Brake disc; 5. Positioning pin; 501. Receiving groove; 502. Slide groove; 503. Through hole two; 504. Hole one; 505. Hole two; 6. Moving parts; 601. End cap; 602. Moving rod; 603. Push block; 604. Slot; 605. Push inclined surface; 7. Chip guard; 8. Bending plate; 801. Inclined plate section; 9. Rotary drive mechanism one; 10. Rotary drive mechanism two; 11. 11. Air outlet duct; 12. Clamping mechanism one; 13. Lifting cylinder one; 14. Chip shield; 15. Lifting cylinder two; 16. Push plate; 17. Pressure plate; 18. Connecting ring one; 19. Arc-shaped elastic element; 20. Trigger block; 21. Connecting rod; 22. Elastic element five; 23. Unlocking ring; 24. Pushing block; 25. Elastic element four; 26. Tooth plate; 261. Clamping tooth; 27. Limiting block; 28. Support seat; 281. Baffle; 29. ​​Elastic element one; 30. Elastic element three; 31. Connecting ring two; 311. Limiting groove; 32. Elastic element two; 33. Air outlet cap; 331. Air outlet channel. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Those skilled in the art should understand that the embodiments described below are only 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.

[0044] The following is one embodiment of a drilling device for machining brake discs of sprinkler trucks provided by the present invention:

[0045] like Figures 1-10 As shown, a drilling device for machining a water sprinkler truck brake disc 4 includes a drilling machine 1, a worktable 2, a positioning boss 3, and a cleaning mechanism.

[0046] like Figures 1-3 As shown, the drilling machine 1 is arranged on a horizontal ground and includes a support platform 101 and a drill bit 102 located above the support platform 101.

[0047] The worktable 2 is mounted on the support platform 101. The worktable has a disc-shaped structure and can rotate around its vertically extending central axis. The support platform 101 is equipped with a rotation drive mechanism for driving the worktable 2 to rotate, which is not shown in the figure.

[0048] There are four sets of positioning bosses 3, all of which are rotatably mounted on the worktable 2. The four sets of positioning bosses 3 are evenly distributed around the central axis of the worktable 2.

[0049] like Figure 4 , Figure 5 As shown, the positioning boss 3 includes a disc-shaped support 301 and a cylindrical shaft 302 coaxially connected to the bottom of the support 301. The top of the support 301 is coaxially provided with a circular protrusion 304, and the outer end of the circular protrusion 304 is provided with two oppositely arranged lugs. The bottom end of the shaft 302 is provided with a circumferentially protruding edge. The shaft 302 is rotatably mounted on the worktable 2. The edges of the bottom ends of the support 301 and the shaft 302 are respectively blocked on the upper and lower sides of the worktable 2.

[0050] The center of the positioning boss 3 has a through hole with a square cross section that runs vertically through it. The bottom of the shaft 302 has two symmetrically arranged internal grooves 303 with downward openings on both sides of the through hole. There are multiple horizontal through holes arranged at equal intervals between the internal grooves 303 and the through hole.

[0051] An elastic positioning element is provided above the positioning boss 3, such as... Figure 7 As shown, the elastic positioning component includes two connecting rings and multiple arc-shaped elastic elements 19. The two connecting rings are coaxial and arranged vertically at intervals, namely, the upper connecting ring 18 and the lower connecting ring 2 31. The multiple arc-shaped elastic elements 19 are connected between the connecting ring 18 and the connecting ring 2 31, and are evenly distributed around the central axis of the connecting rings. The concave side of the arc-shaped elastic elements 19 faces the center of the connecting ring. The inner ring of the connecting ring 2 31 has two opposing limiting grooves 311. The connecting ring 2 31 is fitted onto the outside of the aforementioned circular protrusion 304, and the two lugs are inserted into the two limiting grooves 311 to achieve positioning and anti-rotation of the elastic positioning component. The arc-shaped elastic elements 19 are easily bent and deformed under pressure, and easily return to their original shape when the pressure is removed.

[0052] like Figure 4 , Figure 5, Figure 6 As shown, a positioning post 5 is provided above the elastic positioning member. The outer diameter of the positioning post 5 is consistent with the inner diameter of the brake disc 4, for the brake disc 4 to be fitted. Figure 8 As shown, the top edge of the positioning post 5 is provided with two receiving grooves 501 with openings facing away from each other, which are symmetrically arranged at the center of the positioning post 5. Each of the two side walls of the receiving groove 501 arranged opposite each other in the horizontal direction is provided with a vertically extending sliding groove 502. The top of the positioning post 5 is provided with a hole 1 504 and a hole 2 505 that communicate with the inner cavity of the receiving groove 501.

[0053] like Figure 5 , Figure 6 , Figure 9 As shown, a support base 28 is installed in the receiving groove 501. The support base 28 is slidably installed in the receiving groove 501 by being guided up and down by the two sliding grooves 502. An elastic element 29 is connected between the support base 28 and the top wall of the receiving groove 501. A baffle 281 is connected to the top of the outer end of the support base 28, and the baffle 281 passes through the hole 504. The support base 28 is provided with a mounting hole extending radially along the positioning post 5. A limiting block 27 slides through the mounting hole, and an elastic element 32 is connected between the limiting block 27 and the support base 28.

[0054] A pressure plate 17 is connected to the bottom of the positioning post 5, and the pressure plate 17 presses down on the elastic positioning member. The center of the integral structure formed by the positioning post 5 and the pressure plate 17 is provided with a second through hole 503 with a square cross-section, and the second through hole 503 has the same cross-sectional shape and size as the first through hole mentioned above.

[0055] like Figure 4 , Figure 5 As shown, a movable component 6 is slidably inserted through the center of the positioning post 5. The movable component 6 includes an end cap 601, a movable rod 602, and a push block 603. The movable rod 602 is coaxially connected to the bottom of the end cap 601 and has a square cross-section. The movable rod 602 slidably passes through the aforementioned through holes one and two 503. There are two push blocks 603, which are respectively located on the horizontal sides of the movable rod 602. The outer side of the bottom of the push block 603 is provided with a push slope 605. The push slope 605 is inclined from top to bottom toward the movable rod 602. The push block 603 passes through the aforementioned hole two 505 and is inserted into the receiving groove 501. When the push block 603 moves downward, the push slope 605 can abut against the aforementioned limiting block 27. The end cap 601 is connected to the positioning post 5 by an elastic element 30 that can elastically stretch and contract in the vertical direction. The force required for the arc-shaped elastic element 19 to bend is greater than the force required for the elastic element 30 to compress, so as to ensure that the elastic element 30 can be compressed first during the downward movement of the movable part 6, so as to push the limiting block 27 out of the positioning post 5, and then the arc-shaped elastic element 19 bends, so that the brake pad is supported by the arc-shaped elastic element 19.

[0056] The top of the positioning post 5 is also coaxially connected to a chip-blocking shell 7. The chip-blocking shell 7 is a sleeve-shaped structure with an edge at the top. The aforementioned end cap 601 is slidably inserted through the top of the chip-blocking shell 7. The chip-blocking shell 7 encloses the structure between the end cap 601 and the positioning post 5 inside, preventing chips from getting stuck between the end cap 601 and the positioning post 5.

[0057] like Figure 4 As shown, a one-way locking structure is provided between the bottom of the movable rod 602 and the shaft 302. The one-way locking structure includes a toothed plate 26 and a slot 604. There are two toothed plates 26, which are respectively located in the inner slot 303 and are slidably installed in the inner slot 303 in the horizontal direction. An elastic element 25 that can extend and retract in the horizontal direction is connected between the toothed plate 26 and the outer wall of the inner slot 303. Multiple slotted teeth 261 are provided on the side wall of the toothed plate 26 facing the movable rod 602. The top of the slotted teeth 261 at the end facing away from the toothed plate 26 is provided with a pushing slope that is inclined from top to bottom toward the movable rod 602. The slots 604 are formed on the aforementioned movable rod 602 and located at the bottom of the two side walls of the movable rod 602 opposite to the toothed plate 26. Multiple slots 604 are provided, with each side wall of the movable rod 602 having multiple slots 604 arranged vertically at intervals. The interval between two adjacent slots 604 is the same as the interval between two adjacent teeth 261. A push block 24 is connected to the bottom end of the toothed plate 26. The push block 24 has a push slope that slopes downwards from the movable rod 602 on the side facing the movable rod 602.

[0058] The bottom of the movable rod 602 is connected to an unlocking structure, which includes a trigger block 20 and an unlocking ring 23. The trigger block 20 is located below the movable rod 602 and is connected to the movable rod 602 by an elastic element 22 that can elastically extend and retract vertically. The unlocking ring 23 is located above the trigger block 20. The center of the unlocking ring 23 has a through hole 3 with a square cross section that extends vertically. The unlocking ring 23 is slidably fitted onto the movable rod 602 through the through hole 3. The unlocking ring 23 is connected to the trigger block 20 through two connecting rods 21. The top edge of the unlocking ring 23 abuts against the push-supporting inclined surface.

[0059] like Figures 1-3 As shown, the workbench 2 is arranged with a feeding station, a clamping and positioning station, a drilling station and a chip removal station evenly distributed around it. The feeding station is located directly below the drill bit 102.

[0060] A moving drive mechanism is provided at the clamping and positioning station. The moving drive mechanism includes a second lifting cylinder 15 and a push plate 16. The push plate 16 is connected to the lifting output end of the second lifting cylinder 15 and is located directly above the positioning boss 3 when it moves to the clamping and positioning station. The second lifting cylinder 15 drives the push plate 16 to move downward, causing the push plate 16 to press down on the movable part 6, thereby clamping and fixing the brake disc 4.

[0061] A rotary drive mechanism 210 is provided at the drilling station. The rotary output end of the rotary drive mechanism 210 is connected to a clamping mechanism 12. The clamping mechanism 12 adopts a double-headed clamping cylinder. The double-headed clamping cylinder is used to clamp the trigger block 20 that rotates to the drilling station and drive the trigger block 20 to rotate, thereby driving the positioning boss 3 and the brake disc 4 fixed on the positioning boss 3 to rotate intermittently at a set angle. The drill bit 102 drills holes when the brake disc 4 stops rotating, thereby drilling a ring of evenly distributed assembly holes on the brake disc 4.

[0062] The chip removal station is equipped with a lifting mechanism and a chip shield 14. The lifting mechanism uses a lifting cylinder 13, and the chip shield 14 is connected to the drive output end of the lifting cylinder 13. The chip removal station also has a rotary drive mechanism 9, which uses an infinitely rotating gripper. The infinitely rotating gripper is existing technology and its specific structure will not be described here. When the positioning boss 3 rotates to the chip removal station, the infinitely rotating gripper holds the trigger block 20 at the bottom, causing the positioning boss 3 to rotate at a relatively high speed, which in turn causes the brake disc 4 to rotate. This causes the chips on the brake disc 4 to be thrown out under centrifugal force. The chip shield 14 is fitted over the positioning boss 3 to prevent the chips from being thrown to other stations. During this process, the rotary drive mechanism 9 provides a suitable rotation speed for the positioning boss 3, ensuring that the chips are kept away from the positioning boss 3 and the brake disc 4, preventing the chips from being thrown too far. Meanwhile, the chip shield 14 has a sufficiently large inner diameter, and the inner wall of the chip shield 14 is provided with a rubber layer to prevent a large number of chips from being thrown onto the chip shield 14. When chips are thrown onto the chip shield 14, the rubber layer can also reduce the rebound force and distance, preventing a large number of chips from bouncing back onto the brake disc 4.

[0063] An unlocking trigger structure is provided at the loading station. The unlocking trigger structure is located below the workbench 2. The unlocking trigger structure includes a bending plate 8. The bending plate 8 has a sloping plate section 801 that slopes upwards along the rotation direction of the workbench 2. When the trigger block 20 rotates to the loading station with the workbench 2, it passes through the bending plate 8, contacts the sloping plate section 801, and is pushed upwards by the sloping plate section 801. The trigger block 20 drives the unlocking ring 23 to move upwards. The unlocking ring 23 pushes the two supporting blocks 24 away from each other through the supporting inclined surface, which drives the two toothed plates 26 away from each other, causing the locking teeth 261 to disengage from the locking groove 604.

[0064] like Figure 1 , Figure 10 As shown, the cleaning mechanism includes an air outlet duct 11 and an air outlet cap 33. The air outlet duct 11 extends vertically, is located at the center of the workbench 2, and slides through the workbench 2 in the up-down direction. The air outlet cap 33 is connected to the top of the air outlet duct 11. The top of the air outlet cap 33 is inverted cone shape, and its interior is provided with multiple air outlet channels 331 evenly arranged around the central axis of the air outlet duct 11. The air outlet channels 331 are connected to the inner cavity of the air outlet duct 11. The outer end of the air outlet channel 331 is lower than the inner end, and the extension direction of the air outlet channel 331 forms a 60-degree angle with the central axis of the air outlet duct 11.

[0065] Below the workbench 2 is a lifting drive mechanism for driving the air outlet duct 11 to move up and down reciprocally. A base is connected to the drive output end of the lifting drive mechanism. The air outlet duct 11 is rotatably mounted on the base, and a rotary drive assembly for driving the air outlet duct 11 to rotate is mounted on the base. The air outlet duct 11 is connected to the lifting output end of the lifting drive mechanism. The air outlet duct 11 and the air outlet cap 33 rotate simultaneously while moving up and down. The air discharged from the air outlet channel 331 is blown by the air outlet cap 33 to various parts of the workbench 2, blowing away the chips that fall on the workbench 2.

[0066] In use, the brake disc 4 is placed on the positioning boss 3 at the loading station, with the positioning pin 5 passing through the inner hole of the brake disc 4. The brake disc 4 then rotates with the worktable 2 to the clamping and positioning station. The lifting cylinder 15 drives the push plate 16 downwards, which in turn pushes the movable part 6 downwards. The pushing inclined surface 605 on the push block 603 pushes the limiting block 27 out of the receiving groove 501, moving the outer end of the limiting block 27 above the brake disc 4. The push block 603 continues to move downwards, causing the positioning pin 5 to move downwards. The limiting block 27, along with the positioning pin 5, presses the brake disc 4 firmly against the positioning boss 3 from top to bottom. As the positioning pin 5 moves downwards, it causes the connecting ring 18 to move downwards, causing the arc-shaped elastic element 19 to bend. The arc-shaped elastic element 19 protrudes outwards and presses against the inner wall of the brake disc 4. When the movable part 6 moves down to the brake disc 4 and is supported by the arc-shaped elastic part 19, the locking tooth 261 is inserted into the corresponding locking groove 604, so that the position of the movable part 6 in the vertical direction is fixed. When the push plate 16 leaves the movable part 6, the movable part 6 no longer moves upward, and the brake disc 4 remains in the state of being supported and fixed.

[0067] Afterwards, the brake disc 4 rotates with the worktable 2 to the drilling position. The trigger block 20 moves between the two clamping heads of the double-headed clamping cylinder at the drilling position and is clamped by the double-headed clamping cylinder. The rotation drive mechanism 2 10 drives the positioning protrusion to rotate the brake disc 4. The brake disc 4 stops rotating after each rotation of a set angle. When the brake disc 4 stops rotating, the drill bit 102 moves down to the predetermined position on the brake disc 4 to drill the assembly hole until all the assembly holes on the brake disc 4 are machined.

[0068] The double-headed clamping cylinder at the drilling station releases the trigger block 20, and the brake disc 4 rotates with the worktable 2 to the chip removal station. The lifting cylinder 13 drives the chip baffle 14 to move down. The chip baffle 14 moves to the bottom and contacts the worktable 2, completely blocking the brake disc 4, the positioning boss 3, and the structure on the positioning boss 3 inside the chip baffle 14. The rotation drive mechanism 9 is started, and the brake disc 4 is driven to rotate at a relatively fast speed, causing the chips on the brake disc 4 and the positioning boss to be thrown out under centrifugal force.

[0069] The brake disc 4 rotates with the worktable 2 to the loading station. The trigger block 20 contacts the inclined plate section 801 and is pushed upward by the inclined plate section 801, causing the unlocking ring 23 to move upward and push the two toothed plates 26 away from each other, so that the locking teeth 261 leave the slot 604, thereby unlocking the movable part 6. The movable part 6 moves upward and resets, the limit block 27 leaves the brake disc 4, and the arc-shaped elastic element 19 releases the brake disc 4, allowing the brake disc 4 to be removed. After the drilled brake disc 4 is removed, a new brake disc 4 to be processed is placed at the station, and the above steps are repeated for a new round of processing.

[0070] When a certain number of brake discs 4 have been processed, resulting in a large accumulation of chips on the workbench 2, the rotation of the workbench 2 is stopped, and the cleaning mechanism is activated. The air outlet duct 11 and the air outlet cap 33 are driven to move up and down and rotate simultaneously. During this process, the air discharged from the air outlet duct 331 blows onto the workbench 2. The blown air comes into contact with various areas above the workbench 2 as the air outlet cap 33 rotates and moves up and down, blowing off the chips above the workbench 2 and cleaning the space above the workbench 2.

[0071] This invention provides better clamping and securing of the brake disc 4, preventing surface damage to the edges of the brake disc 4. The invention also features a multi-station drilling process for the brake disc 4, improving processing efficiency. Furthermore, the invention incorporates a cleaning mechanism that effectively cleans all areas above the worktable 2.

Claims

1. A drilling device for machining brake discs of sprinkler trucks, comprising a worktable with a positioning boss on the worktable, characterized in that, A positioning post is provided above the positioning boss for passing through the inner hole of the brake disc. A pressure plate is connected to the bottom of the positioning post. An elastic positioning element is provided between the pressure plate and the positioning boss. The elastic positioning element includes two coaxial connecting rings arranged at intervals and multiple arc-shaped elastic elements evenly connected between the two connecting rings. The concave side of the arc-shaped elastic element faces the middle of the connecting ring. The edge of the positioning column is provided with a receiving groove, and a support seat that can slide up and down elastically is installed in the receiving groove. A limit block is elastically installed on the support seat along the radial direction of the positioning column. A movable part is slidably installed in the middle of the positioning column in the vertical direction. An elastic element is connected between the movable part and the positioning column. The movable part includes a push block, and the push block is provided with a push slope. The push block and the positioning column are engaged in vertical stop cooperation. The bottom of the movable part slides through the positioning boss. A one-way locking structure is provided between the movable part and the positioning boss. The one-way locking structure is used to prevent the movable part from moving upward. A moving drive mechanism is provided on the side of the worktable to drive the movable part to move downward. When the movable part is driven downward, the limiting block is pushed by the pushing inclined surface and moves to the outside of the positioning column. Then, it presses the brake disc onto the positioning boss from top to bottom. The two connecting rings approach each other, so that the arc-shaped elastic element bends and is supported on the inner wall of the brake disc.

2. The drilling device for machining a water sprinkler truck brake disc according to claim 1, characterized in that, The one-way locking structure includes a toothed plate that is elastically slidably mounted on a positioning boss in the horizontal direction. A locking tooth is provided on the side of the toothed plate facing the center of the positioning boss. A pushing slope is provided on the top of the side of the locking tooth facing the center of the positioning boss. Multiple slots are provided on the side wall of the movable part facing the toothed plate, which are arranged vertically and horizontally. When the movable part moves down to the position of the locking tooth corresponding to the slot, the locking tooth can be inserted into the slot.

3. The drilling device for machining a water sprinkler truck brake disc according to claim 2, characterized in that, The bottom end of the toothed plate is connected to a push block, which is located below the worktable. The push block has a push ramp. The bottom end of the movable part extends to the bottom of the worktable, and the bottom end of the movable part is elastically slidably connected to an unlocking structure in the vertical direction. The unlocking structure includes a trigger block and an unlocking ring connected above the trigger block. The side of the worktable is also provided with an unlocking trigger structure for pushing the trigger block upward. When the trigger block moves upward, the top edge of the unlocking ring contacts the push ramp, and pushes the push block through the push ramp to drive the toothed plate to move away from the movable part, so that the toothed plate disengages from the slot and is unlocked.

4. The drilling device for machining a water sprinkler truck brake disc according to claim 3, characterized in that, The worktable is rotatable around its central axis. There is a gap between the positioning boss and the center of the worktable. The sides of the worktable are arranged in sequence around its circumference as a loading station, a clamping and positioning station, and a drilling station. The moving drive mechanism is located at the clamping and positioning station, and the unlocking trigger structure is located at the loading station.

5. The drilling device for machining a water sprinkler truck brake disc according to claim 4, characterized in that, The unlocking trigger structure includes a bending plate, which includes a sloping plate segment that tilts upwards along the rotation direction of the workbench. When the trigger block rotates to the loading station as the workbench rotates, it contacts the sloping plate segment and is pushed upwards by the sloping plate segment.

6. The drilling device for machining a water sprinkler truck brake disc according to claim 5, characterized in that, The positioning boss is rotatably mounted on the worktable around its central axis. A chip removal station is provided between the drilling station and the feeding station. A rotary drive mechanism is provided at the chip removal station. The rotary drive mechanism is used to drive the positioning boss to rotate, so that the chips generated by drilling are thrown off the brake disc under centrifugal force.

7. The drilling device for machining a water sprinkler truck brake disc according to claim 6, characterized in that, The chip removal station is also equipped with a chip baffle and a lifting mechanism. The chip baffle is connected to the lifting output end of the lifting mechanism. The lifting mechanism is used to drive the chip baffle to move up and down so that the chip baffle is positioned outside the positioning boss during the chip removal process. After the chip removal is completed, the chip baffle is driven to move above the positioning boss.

8. A drilling device for machining a water sprinkler truck brake disc according to any one of claims 1-7, characterized in that, The moving drive mechanism includes a lifting cylinder and a push plate. The push plate is connected to the drive output end of the lifting cylinder and is located above the movable part that rotates to the clamping and positioning position.

9. A drilling device for machining a water sprinkler truck brake disc according to any one of claims 1-7, characterized in that, A cleaning mechanism is installed on the workbench. The cleaning mechanism includes an air outlet duct that is movably installed in the middle of the workbench and an air outlet cap connected to the top of the air outlet duct. The air outlet duct can rotate around its own axis. The air outlet cap has multiple air outlet channels that are connected to the air outlet duct and are evenly distributed around the axis of the air outlet duct. The outer ends of the air outlet channels are inclined downwards.

10. A drilling device for machining a water sprinkler truck brake disc according to claim 6 or 7, characterized in that, The loading station, clamping and positioning station, drilling station, and chip removal station are evenly distributed around the workbench, and four sets of positioning bosses are evenly installed on the workbench along the circumference of the workbench.

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