Drilling equipment for engine crankshaft

Abstract

The invention relates to the technical field of drilling of engine crankshafts, and discloses drilling machining equipment for engine crankshafts, which comprises a supporting structure and further comprises a propelling mechanism, a cleaning mechanism and a shaking mechanism, the top end of the supporting structure is fixedly connected with the bottom end of the propelling mechanism, and the side surface of the propelling mechanism is connected with the inner side of the cleaning mechanism; the side face of the shaking mechanism is fixedly connected with the inner side of the supporting structure, and the side face of the shaking mechanism is connected with the side face of the propelling mechanism. The magnetic scraper is driven to move through the feeding mechanism of the cutter, chips on the workbench can be cleaned conveniently, the chips are prevented from being accumulated near the cutter and influencing the cutting process, the scraper helps push the chips away from a cutting area in time, and interference of the chips is reduced; chippings left by drilling are cleaned back and forth on the bearing plate through the magnetic scraping plate, the chippings can be removed in time, interference to the position of a workpiece and the cutting process is avoided, and therefore high-precision machining is kept.

Description

Technical Field

[0001] This invention relates to the field of drilling technology for engine crankshafts, and more specifically to a drilling equipment for engine crankshafts. Background Technology

[0002] The crankshaft is the most important component in an engine. It bears the force transmitted from the connecting rod and converts it into torque, which is then output through the crankshaft to drive other accessories on the engine. With the continuous advancement of engine technology, the processing requirements for crankshafts are constantly increasing. Appropriate holes need to be drilled into its surface for installation. Drilling machines refer to a general term for machinery and equipment that use tools harder and sharper than the target material to leave cylindrical holes or openings in the target material through rotary cutting or rotary extrusion. Existing drilling equipment still has some problems, as detailed below: 1. During the drilling process of the crankshaft, the debris generated will be blown onto the worktable by the blower. The debris will accumulate on the surface of the worktable for a long time, resulting in an unstable gap between the drill bit or the workpiece. This will cause inaccurate positioning of the workpiece, thus affecting the final machining accuracy. The debris can also be easily carried into the cutting zone by the drill bit, increasing cutting friction and causing uneven force on the tool. Second, the subsequent handling of debris cannot be classified. Different types of debris mixed together can easily lead to inconvenience in waste disposal, thereby increasing the risk of environmental pollution. Unclearly classified debris cleaning may result in debris not being cleaned up in time during the production process, thereby reducing the stability and efficiency of the workbench and equipment.

[0003] Therefore, the present invention urgently requires a drilling equipment for engine crankshafts. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a drilling equipment for engine crankshafts to solve the problems existing in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a drilling and machining equipment for engine crankshafts, comprising a support structure, a propulsion mechanism, a cleaning mechanism, and a swaying mechanism, wherein the top end of the support structure is fixedly connected to the bottom end of the propulsion mechanism, the side of the propulsion mechanism is connected to the inner side of the cleaning mechanism, the side of the swaying mechanism is fixedly connected to the inner side of the support structure, and the side of the swaying mechanism is connected to the side of the propulsion mechanism. The propulsion mechanism includes an outer fixed frame and an inner rotating ring. A toothed ring is fixedly connected to the side of the outer fixed frame. An internal sliding groove is opened on the inner side of the outer fixed frame. A ball is connected to the inner side of the internal sliding groove. The side of the ball is connected to the side of the inner rotating ring. A support platform is fixedly connected to the bottom of the outer fixed frame. The shaking mechanism includes an upper support frame and an outer control tube. The inner side of the upper support frame is provided with a movable groove. The bottom end of the upper support frame is connected to a lower support frame. The inner side of the upper support frame is connected to the side of the outer control tube. The top end of the outer control tube is fixedly connected to a second guide rod, and the top end of the second guide rod is connected to a filter screen.

[0006] Furthermore, the support structure includes a load-bearing plate and a collection box. A baffle is fixedly connected to the top of the load-bearing plate, and a sliding groove is provided on the side of the baffle. The inner side of the sliding groove is connected to the side of the cleaning mechanism. The top of the load-bearing plate is fixedly connected to the bottom of the support platform. A support plate is fixedly connected to the top of the load-bearing plate. The inner side of the load-bearing plate is connected to the side of the filter screen. A support rod is connected to the side of the filter screen. The top of the support rod is fixedly connected to the inner side of the load-bearing plate. The top of the collection box is connected to the bottom of the load-bearing plate.

[0007] Furthermore, a fixing plate is fixedly connected to the side of the outer fixing frame, and a moving groove is opened on the side of the fixing plate. The inner side of the moving groove is connected to the side of the cleaning mechanism. An inner support is fixedly connected to the inner side of the inner rotating ring. A central plate is fixedly connected to the top of the inner support. A rotating shaft is fixedly connected to the side of the central plate. A rotating motor is fixedly connected to the top of the rotating shaft.

[0008] Furthermore, a conveyor belt is connected to the side of the rotary motor, a fixed shaft is fixedly connected to the side of the inner bracket, an internal gear is connected to the side of the fixed shaft, the side of the internal gear meshes with the inner side of the gear ring, a connecting plate is fixedly connected to the side of the internal gear, a positioning rod is fixedly connected to the side of the connecting plate, and the side of the positioning rod is connected to the inner side of the cleaning mechanism.

[0009] Furthermore, the cleaning mechanism includes a connecting rod and a fixing ring. A limiting ring is fixedly connected to the side of the connecting rod, the inner side of the limiting ring is connected to the side of the positioning rod, the side of the connecting rod is connected to the inner side of the moving groove, and a platform is fixedly connected to the top of the connecting rod.

[0010] Furthermore, the side of the connecting rod is fixedly connected to the inner side of the fixing ring, and an L-shaped linkage rod is fixedly connected to the side of the fixing ring. A magnetic scraper is fixedly connected to the bottom end of the L-shaped linkage rod, and the bottom end of the magnetic scraper is connected to the side of the load-bearing plate. A first guide rod is fixedly connected to the side of the magnetic scraper, and the side of the first guide rod is connected to the inner side of the sliding groove.

[0011] Furthermore, a limiting groove is formed on the side of the outer control tube, a limiting rod is connected to the inner side of the limiting groove, the side of the outer control tube is connected to the side of the lower support frame, the side of the upper support frame is fixedly connected to the inner side of the load-bearing plate, and an inner rotating rod is connected to the inner side of the outer control tube.

[0012] Furthermore, a guide groove is provided on the side of the inner rotating rod, the inner side of the guide groove is connected to the side of the limiting rod, a rotating rod is fixedly connected to the bottom end of the inner rotating rod, the side of the rotating rod is connected to the side of the conveyor belt, and the top end of the limiting rod is connected to the inner side of the moving slide.

[0013] The technical effects and advantages of this invention are as follows: 1. This invention features a propulsion mechanism that drives a magnetic scraper to move via the tool feeding mechanism. This facilitates the cleaning of debris on the worktable, preventing debris from accumulating near the tool and affecting the cutting process. The scraper helps to push debris away from the cutting area in a timely manner, reducing debris interference. It also removes debris, reducing direct contact between the tool and the debris, thereby reducing tool wear.

[0014] 2. This invention features a cleaning mechanism that uses a magnetic scraper to clean the debris left from drilling on the load-bearing plate. This facilitates the timely removal of these impurities, preventing interference with the workpiece position and cutting process, thereby maintaining high-precision machining. No manual intervention is required; the task of cleaning the workbench is automatically completed by the equipment, ensuring a smoother production process.

[0015] 3. The present invention has a shaking mechanism, which drives the second guide rod to move left and right on the filter screen via a conveyor belt to shake the debris to the inside of the collection box. This helps the debris to move from the processing area to the collection box more quickly, reducing the interference of debris accumulation on the processing process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the supporting structure of the present invention; Figure 3 This is a schematic diagram of the propulsion mechanism of the present invention; Figure 4 This is a partial structural diagram of the propulsion mechanism of the present invention; Figure 5 This is a schematic diagram of the cleaning mechanism structure of the present invention; Figure 6 This is a schematic diagram of the drive mechanism structure of the present invention; Figure 7 This is a schematic diagram of the shaking mechanism of the present invention; Figure 8 This is a schematic diagram of the disassembled structure of the shaking mechanism of the present invention; Figure 9 This is a partial schematic diagram of the shaking mechanism of the present invention.

[0017] The attached figures are labeled as follows: 1. Support structure; 101. Load-bearing plate; 102. Baffle; 103. Sliding groove; 104. Support plate; 105. Support platform; 106. Filter screen; 107. Collection box; 108. Support rod; 2. Promoting organizations; 21. Outer fixed frame; 211. Internal sliding groove; 212. Fixed plate; 213. Moving groove; 214. Ball bearing; 22. Gear ring; 221. Internal gear; 222. Connecting plate; 223. Positioning rod; 23. Inner rotating ring; 231. Inner support; 232. Fixed shaft; 233. Center plate; 234. Rotary motor; 235. Rotating shaft; 236. Conveyor belt; 3. Cleaning up the organization; 31. Connecting rod; 311. Limiting ring; 312. Stage; 32. Fixing ring; 321. L-shaped linkage rod; 322. Magnetic scraper; 323. First guide rod; 4. Shaking mechanism; 41. Upper support frame; 411. Lower support frame; 412. Moving slide; 42. External control tube; 421. Second guide rod; 422. Limiting groove; 43. Rotating rod; 431. Inner rotating rod; 432. Guide groove; 433. Limiting rod. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The drilling and machining equipment for engine crankshafts involved in the present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Reference Figures 1 to 4 The present invention provides a drilling equipment for engine crankshaft, including a support structure 1, a propulsion mechanism 2, a cleaning mechanism 3 and a shaking mechanism 4. The top end of the support structure 1 is fixedly connected to the bottom end of the propulsion mechanism 2, the side of the propulsion mechanism 2 is connected to the inner side of the cleaning mechanism 3, the side of the shaking mechanism 4 is fixedly connected to the inner side of the support structure 1, and the side of the shaking mechanism 4 is connected to the side of the propulsion mechanism 2. The propulsion mechanism 2 includes an outer fixed frame 21 and an inner rotating ring 23. A toothed ring 22 is fixedly connected to the side of the outer fixed frame 21. An inner groove 211 is provided on the inner side of the outer fixed frame 21. A ball 214 is connected to the inner side of the inner groove 211. The side of the ball 214 is connected to the side of the inner rotating ring 23. A support platform 105 is fixedly connected to the bottom end of the outer fixed frame 21. The shaking mechanism 4 includes an upper support frame 41 and an outer control tube 42. The inner side of the upper support frame 41 is provided with a movable slide groove 412. The bottom end of the upper support frame 41 is connected to a lower support frame 411. The inner side of the upper support frame 41 is connected to the side of the outer control tube 42. The top end of the outer control tube 42 is fixedly connected to a second guide rod 421. The top end of the second guide rod 421 is connected to a filter screen 106.

[0020] The support structure 1 includes a load-bearing plate 101 and a collection box 107. A baffle 102 is fixedly connected to the top of the load-bearing plate 101. A sliding groove 103 is provided on the side of the baffle 102. The inner side of the sliding groove 103 is connected to the side of the cleaning mechanism 3. The top of the load-bearing plate 101 is fixedly connected to the bottom of the support platform 105. A support plate 104 is fixedly connected to the top of the load-bearing plate 101. The inner side of the load-bearing plate 101 is connected to the side of the filter screen 106. A support rod 108 is connected to the side of the filter screen 106. The top of the support rod 108 is fixedly connected to the inner side of the load-bearing plate 101. The top of the collection box 107 is connected to the bottom of the load-bearing plate 101.

[0021] Among them, a fixing plate 212 is fixedly connected to the side of the outer fixing frame 21, and a moving groove 213 is opened on the side of the fixing plate 212. The inner side of the moving groove 213 is connected to the side of the cleaning mechanism 3. An inner support 231 is fixedly connected to the inner side of the inner rotating ring 23. A central disk 233 is fixedly connected to the top of the inner support 231. A rotating shaft 235 is fixedly connected to the side of the central disk 233. A rotating motor 234 is fixedly connected to the top of the rotating shaft 235.

[0022] The rotary motor 234 is connected to a conveyor belt 236 on its side. The inner support 231 is fixedly connected to a fixed shaft 232 on its side. The fixed shaft 232 is connected to an internal gear 221 on its side. The side of the internal gear 221 meshes with the inner side of the gear ring 22. The side of the internal gear 221 is fixedly connected to a connecting plate 222. The side of the connecting plate 222 is fixedly connected to a positioning rod 223. The side of the positioning rod 223 is connected to the inner side of the cleaning mechanism 3.

[0023] The groove opened at the location where the filter screen 106 is fixed inside the support structure 1 is larger than the size of the filter screen 106. Therefore, during the process of moving inside the second guide rod 421, the filter screen 106 can shake with the arc movement of the second guide rod 421, so that the debris falls better into the inner side of the collection box 107. The sliding groove 103 opened inside the baffle 102 allows the first guide rod 323 to slide inside the sliding groove 103. The top of the filter screen 106 will not be blocked by the edge of the top of the load-bearing plate 101, so that the debris can be moved to the middle part of the filter screen 106 and screened into the inner side of the collection box 107 by the shaking of the shaking mechanism 4. The outer fixed frame 21 and the inner rotating ring 23 move relative to each other. The outer fixed frame 21 is fixed to the inner side of the support platform 105, and the inner rotating ring 23 slides through the ball bearings 214 on the inner side of the built-in slide groove 211. Therefore, the bottom 245 of the rotary motor 234 is fixedly connected to the center disk 233. The start of the rotary motor 234 directly drives the center disk 233 to rotate. The inner bracket 231 fixed to the side of the center disk 233 is fixed to the inner side of the inner rotating ring 23. Therefore, the components inside the inner rotating ring 23 rotate accordingly, thereby driving the built-in gear 221 on the side of the fixed shaft 232 to rotate inside the gear ring 22. The bottom of the connecting plate 222 is connected to the side of the positioning rod 223. Since the position of the positioning rod 223 is at the same height as the rotation center of the center disk 233, the limiting ring 311 on the side of the positioning rod 223 drives the connecting rod 31 to move in a horizontal position.

[0024] Reference Figure 5 The cleaning mechanism 3 includes a connecting rod 31 and a fixing ring 32. A limiting ring 311 is fixedly connected to the side of the connecting rod 31. The inner side of the limiting ring 311 is connected to the side of the positioning rod 223. The side of the connecting rod 31 is connected to the inner side of the moving groove 213. A platform 312 is fixedly connected to the top of the connecting rod 31.

[0025] The side of the connecting rod 31 is fixedly connected to the inner side of the fixing ring 32. The side of the fixing ring 32 is fixedly connected to an L-shaped linkage rod 321. The bottom end of the L-shaped linkage rod 321 is fixedly connected to a magnetic scraper 322. The bottom end of the magnetic scraper 322 is connected to the side of the load-bearing plate 101. The side of the magnetic scraper 322 is fixedly connected to a first guide rod 323. The side of the first guide rod 323 is connected to the inner side of the sliding groove 103.

[0026] The magnetic scraper 322 is always in front of the platform 312, so the magnetic scraper 322 can clean the debris on the surface of the load-bearing plate 101 when it moves.

[0027] Reference Figures 6 to 9The outer control tube 42 has a limiting groove 422 on its side, and a limiting rod 433 is connected to the inner side of the limiting groove 422. The side of the outer control tube 42 is connected to the side of the lower support frame 411, and the side of the upper support frame 41 is fixedly connected to the inner side of the load-bearing plate 101. An inner rotating rod 431 is connected to the inner side of the outer control tube 42.

[0028] The inner rotating rod 431 has a guide groove 432 on its side, the inner side of the guide groove 432 is connected to the side of the limiting rod 433, the bottom end of the inner rotating rod 431 is fixedly connected to a rotating rod 43, the side of the rotating rod 43 is connected to the side of the conveyor belt 236, and the top end of the limiting rod 433 is connected to the inner side of the moving slide 412.

[0029] The rotating rod 43 is connected to the rotating motor 234 via the transmission belt 236. Therefore, the start of the rotating motor 234 will also drive the second guide rod 421 to slide inside the filter screen 106 and shake the filter screen 106. The rotating rod 43 drives the inner rotating rod 431 to rotate. The guide groove 432 guides the limiting rod 433 so that it can reciprocate on the surface of the inner rotating rod 431. The second guide rod 421 rotates in the upper half position of the outer control tube 42 due to the limiting effect of the limiting groove 422.

[0030] The working principle of this invention is as follows: When drilling the engine crankshaft, the rotary motor 234 is started to drive the center disk 233 to rotate. When the center disk 233 rotates inside the outer fixed frame 21, the ball bearings 214 inside the built-in groove 211 reduce friction by sliding relative to each other. A fixed shaft 232 is fixed on the side of the inner bracket 231 connected to the center disk 233. The built-in gear 221 connected to the side of the inner bracket 231 rolls inside the gear ring 22. The rolling of the built-in groove 211 drives the positioning rod 223 on the side of the connecting plate 222 to move horizontally on its plane. The limiting ring 311 connected to the side of the positioning rod 223 provides power for the movement of the cleaning mechanism 3. The fixed plate 212 fixed on the side of the outer fixed frame 21 restricts the direction of the movement of the connecting rod 31.

[0031] The rotary motor 234 provides forward power to the platform 312, so a magnetic scraper 322 is placed in front of the platform 312. When the connecting rod 31 rotates inside the gear ring 22 via the built-in gear 221, driving it to feed to the side of the engine crankshaft to be drilled, the rotary motor 234 stops running. The magnetic scraper 322 is connected to the front of the platform 312 via the L-shaped connecting rod 321 and the fixing ring 32, so the magnetic scraper 322 is on the side where the crankshaft is located during drilling, and the debris generated by drilling falls onto the magnetic scraper. Within the cleaning range of 322, after the drilling of the platform 312 is completed, the tool of the platform 312 needs to be replaced. The rotary motor 234 is started again to retract the connecting rod 31 and drive the platform 312 to the tool change position to replace the tool. At the same time as the retraction, the magnetic scraper 322 also moves with the connecting rod 31, so the debris generated during the drilling process is swept to the filter screen 106. After the tool change is completed, when drilling the crankshaft again, the magnetic scraper 322 is moved to the corresponding position again to wait for the next cleaning. When the magnetic scraper 322 moves to the top of the filter screen 106, the debris is scraped to the top of the filter screen 106 and falls from the filter screen 106 into the inside of the collection box 107 for recycling. Because the magnetic scraper 322 is magnetic, it can attract iron filings and scrape aluminum filings to the top of the filter screen 106, where they fall into the inside of the collection box 107 for recycling. After a certain number of crankshafts have been drilled, the iron filings on the side of the magnetic scraper 322 can be collected. Debris at the top of the filter screen 106 accumulates on its surface, affecting subsequent collection. Therefore, a support frame 41 is installed on its side. The support of the upper and lower support frames 411 allows the second guide rod 421 at the top of the outer control tube 42 to slide on the side of the filter screen 106. The side of the limiting rod 433 slides inside the limiting groove 422 on the side of the outer control tube 42. The bottom end of the limiting rod 433 connects to the inside of the guide groove 432 on the side of the inner rotating rod 431. 32 converts the rotation brought by the rotating rod 43 into the reciprocating motion of the limiting rod 433 inside it. The limiting groove 422 restricts the second guide rod 421 to make a semi-circular reciprocating motion with the outer control tube 42. The second guide rod 421 is connected to the side of the filter screen 106 and shakes it left and right, shaking the debris at the top of the screen to the inside of the collection box 107. The other end of the filter screen 106 is fixed to the inside of the load-bearing plate 101 by the support rod 108, which provides a rotation limiting function for it. Furthermore, the rotary motor 234 and the rotating rod 43 are bound together by the conveyor belt 236 for transmission. The rotation of the rotating rod 43 also moves with the start of the rotary motor 234. The side of the limiting rod 433 is connected to the movable slide groove 412 on the inner side of the upper support frame 41, which can limit the sliding direction of the limiting rod 433 so that it does not slide with the limiting groove 422 or the guide groove 432.

[0032] The above description is merely 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 drilling machine for engine crankshafts, comprising a support structure (1), characterized in that: It also includes a propulsion mechanism (2), a cleaning mechanism (3) and a shaking mechanism (4). The top end of the support structure (1) is fixedly connected to the bottom end of the propulsion mechanism (2), the side of the propulsion mechanism (2) is connected to the inner side of the cleaning mechanism (3), the side of the shaking mechanism (4) is fixedly connected to the inner side of the support structure (1), and the side of the shaking mechanism (4) is connected to the side of the propulsion mechanism (2). The propulsion mechanism (2) includes an outer fixed frame (21) and an inner rotating ring (23). A toothed ring (22) is fixedly connected to the side of the outer fixed frame (21). An internal sliding groove (211) is opened on the inner side of the outer fixed frame (211). A ball (214) is connected to the inner side of the internal sliding groove (211). The side of the ball (214) is connected to the side of the inner rotating ring (23). A support platform (105) is fixedly connected to the bottom end of the outer fixed frame (21). The shaking mechanism (4) includes an upper support frame (41) and an outer control tube (42). The inner side of the upper support frame (41) is provided with a sliding groove (412). The bottom end of the upper support frame (41) is connected to a lower support frame (411). The inner side of the upper support frame (41) is connected to the side of the outer control tube (42). The top end of the outer control tube (42) is fixedly connected to a second guide rod (421). The top end of the second guide rod (421) is connected to a filter screen (106). The groove opened at the location where the filter screen (106) is fixed inside the support structure (1) is larger than the size of the filter screen (106). Therefore, as the filter screen (106) moves inside the structure via the second guide rod (421), it can sway with the arc movement of the second guide rod (421).

2. The drilling equipment for engine crankshafts according to claim 1, characterized in that: The support structure (1) includes a load-bearing plate (101) and a collection box (107). A baffle (102) is fixedly connected to the top of the load-bearing plate (101). A sliding groove (103) is provided on the side of the baffle (102). The inner side of the sliding groove (103) is connected to the side of the cleaning mechanism (3). The top of the load-bearing plate (101) is fixedly connected to the bottom of the support platform (105).

3. The drilling equipment for engine crankshafts according to claim 2, characterized in that: The top of the load-bearing plate (101) is fixedly connected to a support plate (104). The inner side of the load-bearing plate (101) is connected to the side of the filter screen (106). The side of the filter screen (106) is connected to a support rod (108). The top of the support rod (108) is fixedly connected to the inner side of the load-bearing plate (101). The top of the collection box (107) is connected to the bottom of the load-bearing plate (101).

4. The drilling equipment for engine crankshafts according to claim 1, characterized in that: A fixing plate (212) is fixedly connected to the side of the outer fixing frame (21). A moving groove (213) is provided on the side of the fixing plate (212). The inner side of the moving groove (213) is connected to the side of the cleaning mechanism (3). An inner support (231) is fixedly connected to the inner side of the inner rotating ring (23). A central disk (233) is fixedly connected to the top of the inner support (231). A rotating shaft (235) is fixedly connected to the side of the central disk (233). A rotating motor (234) is fixedly connected to the top of the rotating shaft (235).

5. A drilling apparatus for engine crankshafts according to claim 4, characterized in that: The rotating motor (234) is connected to a conveyor belt (236) on its side, and a fixed shaft (232) is fixedly connected to the side of the inner bracket (231). An internal gear (221) is connected to the side of the fixed shaft (232), and the side of the internal gear (221) meshes with the inner side of the gear ring (22).

6. The drilling equipment for engine crankshafts according to claim 5, characterized in that: A connecting plate (222) is fixedly connected to the side of the built-in gear (221), and a positioning rod (223) is fixedly connected to the side of the connecting plate (222). The side of the positioning rod (223) is connected to the inner side of the cleaning mechanism (3).

7. A drilling apparatus for engine crankshafts according to claim 6, characterized in that: The cleaning mechanism (3) includes a connecting rod (31) and a fixing ring (32). A limiting ring (311) is fixedly connected to the side of the connecting rod (31). The inner side of the limiting ring (311) is connected to the side of the positioning rod (223). The side of the connecting rod (31) is connected to the inner side of the moving groove (213). A platform (312) is fixedly connected to the top of the connecting rod (31).

8. A drilling apparatus for engine crankshafts according to claim 7, characterized in that: The side of the connecting rod (31) is fixedly connected to the inner side of the fixing ring (32). The side of the fixing ring (32) is fixedly connected to an L-shaped linkage rod (321). The bottom end of the L-shaped linkage rod (321) is fixedly connected to a magnetic scraper (322). The bottom end of the magnetic scraper (322) is connected to the side of the load-bearing plate (101). The side of the magnetic scraper (322) is fixedly connected to a first guide rod (323). The side of the first guide rod (323) is connected to the inner side of the sliding groove (103).

9. A drilling apparatus for engine crankshafts according to claim 1, characterized in that: The outer control tube (42) has a limiting groove (422) on its side, and a limiting rod (433) is connected to the inner side of the limiting groove (422). The side of the outer control tube (42) is connected to the side of the lower support frame (411), and the side of the upper support frame (41) is fixedly connected to the inner side of the load-bearing plate (101). An inner rotating rod (431) is connected to the inner side of the outer control tube (42).

10. A drilling apparatus for engine crankshafts according to claim 9, characterized in that: The inner rotating rod (431) has a guide groove (432) on its side. The inner side of the guide groove (432) is connected to the side of the limiting rod (433). The bottom end of the inner rotating rod (431) is fixedly connected to a rotating rod (43). The side of the rotating rod (43) is connected to the side of the conveyor belt (236). The top end of the limiting rod (433) is connected to the inner side of the moving slide (412).

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