A machine tool for grinding a profile shaft

Abstract

The application discloses a special-shaped shaft grinding machine tool, and relates to the field of grinding machine tools, which comprises a rack, a grinding mechanism arranged at the upper end of the rack, a support plate fixedly arranged at one end of the rack, a moving plate slidably connected to the other end of the rack, a rotating disc rotatably connected to the support plate and the moving plate in the vertical direction, a driving piece fixedly connected to the support plate and used for driving the rotating disc to rotate, a sliding groove arranged in the radial direction of the rotating disc, a three-jaw chuck arranged on the rotating disc, a sliding block fixedly connected to the three-jaw chuck, the sliding block being inserted into the sliding groove and slidably connected to the rotating disc along the sliding groove, a plurality of positioning blocks arranged on the side of the rotating disc close to the three-jaw chuck, the positioning blocks being distributed along the length direction of the sliding groove, a mounting block detachably connected to the side of the positioning block away from the rotating disc, the mounting block being arranged across the sliding groove, an installation groove adapted to the sliding block being arranged on one side of the mounting block, and a positioning assembly arranged on the mounting block and used for fixing the sliding block in the installation groove. The application has the effect of improving the machining efficiency of the crankshaft connecting rod.

Description

Technical Field

[0001] This invention relates to the field of grinding machine tools, and more particularly to a grinding machine tool for irregular shafts. Background Technology

[0002] Irregularly shaped shafts refer to shaft parts with irregular shapes. In some special working environments, irregularly shaped shafts can better meet design requirements. For example, the transmission crankshaft used in automobile engines has two sets of connecting rod shafts with different axes. The transmission crank requires high working precision, and the outer circle of the shaft section needs to be precision machined by grinding.

[0003] Related technologies can be found in Chinese Patent No. CN117124156B, which discloses a crankshaft grinding equipment with a rotating center offset and a crankshaft manufacturing process. The rotating center offset crankshaft grinding equipment includes a base and a cross seat mounted on the base, as well as: a first chuck and a second chuck, both mounted on the cross seat. The first chuck is connected to a power component mounted on the cross seat, and the second chuck is connected to an orientation adjustment mechanism mounted on the cross seat. A cross plate is movably mounted on one side of the base and can move along the width of the base. An assembly plate is movably mounted on the cross plate through a position switching mechanism, and a grinding wheel is mounted on the assembly plate. Since the movement of the grinding wheel towards and away from the main journal and connecting rod journal is controlled by a centrifugal triggering mechanism, no manual operation is required, thus effectively enhancing the safety during processing.

[0004] Regarding the aforementioned technologies, when switching the grinding position from the connecting rod's main journal to the connecting rod's shaft diameter, the operator needs to rotate the first lead screw. Through the interaction between the first lead screw and the first threaded sleeve, the second chuck and crankshaft move. Due to the high machining accuracy of the grinding machine, the positioning requirements of the first lead screw are also high. This means that the first lead screw needs to rotate a large number of times when driving the first threaded sleeve, which takes a certain amount of time. When multiple crankshaft connecting rods need to be processed, repeatedly adjusting the first lead screw takes a lot of time. If two well-calibrated processing machines are used for grinding, disassembling and clamping the connecting rod between different grinding machines also takes time, resulting in low processing efficiency for the crankshaft connecting rods. Summary of the Invention

[0005] In order to improve the machining efficiency of crankshaft connecting rods, this application provides a grinding machine tool for irregular shafts.

[0006] This application provides a grinding machine tool for irregular shafts, which adopts the following technical solution: A grinding machine tool for irregular shafts includes a grinding mechanism at the upper end of the frame. A support plate is fixedly connected to one end of the frame, and a movable plate is provided at the other end. The movable plate is slidably connected to the frame along its length. The frame is provided with a lead screw for driving the movable plate. Both the support plate and the movable plate are rotatably connected to turntables in a vertical direction. A driving component for driving the turntables to rotate is fixedly connected to the support plate. Slide grooves are provided on the sides of the two turntables that are close to each other. The slide grooves are arranged along the diameter direction of the turntables. The turntables are provided with a three-jaw chuck. A slider adapted to the slide groove is fixedly mounted on the three-jaw chuck. The slider is inserted into the slide groove and slidably connected to the turntable along the length direction of the slide groove. Several positioning blocks are distributed on the turntable along the length direction of the slide groove. A mounting block is detachably connected to the side of the positioning block near the three-jaw chuck. The mounting block has a mounting groove adapted to the slider and a positioning component for fixing the slider in the mounting groove.

[0007] By adopting the above technical solution, the turntable positions the mounting block using positioning blocks. With the cooperation of the slider and the mounting groove, the mounting block is fixed to the three-jaw chuck by the positioning assembly. Two sets of mounting blocks are provided, the distance between the two blocks corresponding to the distance between the axes of the two connecting rod shafts of the connecting rod crankshaft, and the openings of the mounting grooves of the two blocks face each other. The connecting rod crankshaft is placed between the two turntables, and one end of the connecting rod crankshaft is clamped and fixed by the three-jaw chuck connected to the support plate. A lead screw drives a moving plate closer to the support plate, causing the other three-jaw chuck to cooperate in fixing the connecting rod crankshaft. At this time, the axes of any one set of connecting rod shafts of the connecting rod crankshaft are coaxial with the rotation axis of the turntable. When the drive unit drives the turntable to rotate, the turntable drives the connecting rod crankshaft to rotate via the three-jaw chuck, and the grinding mechanism grinds the connecting rod crankshaft. When it is necessary to process the connecting rod shaft on the other axis of the connecting rod crankshaft, the positioning component is adjusted to release the mounting block from the slider, the two three-jaw chucks are moved along the slide groove, and the three-jaw chucks are fixed again by another mounting block. After the adjustment of the connecting rod crankshaft is completed, the other set of connecting rod shafts of the connecting rod crankshaft is ground by the grinding mechanism. The movement of the three-jaw chucks is relatively convenient and helps to improve the processing efficiency of the crankshaft connecting rod.

[0008] Optionally, the positioning block is slidably connected to the turntable along the length of the slide groove. The turntable has several drive screws along its length on the side opposite to the three-jaw chuck. All drive screws are parallel to the slide groove and coaxial with each other. Fixed blocks are fixedly connected to both ends of the turntable. The drive screws at the ends are rotatably connected to the fixed blocks. A straight plate is provided between adjacent drive screws. Rotary rods are fixedly connected to both sides of the straight plate. The rotary rods are inserted into the drive screws and rotatably connected to them. The positioning block has threaded holes adapted to the drive screws. The drive screws pass through the threaded holes and are threadedly engaged with the threaded holes. The positioning block also has a clearance groove communicating with the threaded holes. The clearance groove is adapted to the support plate.

[0009] By adopting the above technical solution, the fixed block, straight plate and rotating rod cooperate to support the rotation of the drive screw. With the cooperation of the threaded hole, when the drive screw rotates, it drives the positioning block to move along the length of the slide groove. The drive screw limits the positioning block. When the positioning block moves between the two drive screws, the clearance groove avoids the straight plate. Furthermore, the rotation of any drive screw does not interfere with the other drive screw, which helps to improve the convenience of adjusting the position of the positioning block.

[0010] Optionally, the drive screw has two positioning grooves along its length. The two positioning grooves are symmetrically arranged with the axis of the drive screw as the center, and the positioning grooves pass through the external thread of the drive screw. A rotating block is sleeved on the outside of the drive screw, and an insert plate is fixedly connected to the rotating block. The insert plate is inserted into the positioning groove and is slidably connected to the drive screw along the length of the positioning groove.

[0011] By adopting the above technical solution, under the cooperation of the insert plate and the positioning groove, when the rotating block is rotated, the rotating block drives the drive screw to rotate, which helps to improve the convenience of rotating the drive screw.

[0012] Optionally, the mounting block is fixedly connected to an insert block on the side near the turntable, and the positioning block has a slot adapted to the insert block. The insert block is inserted into the corresponding slot, one side of the mounting block is in contact with the turntable, and the other side is in contact with the three-jaw chuck.

[0013] By adopting the above technical solution, under the cooperation of the insert block and the slot, the positioning block limits the radial displacement of the mounting block along the turntable. When the three-jaw chuck contacts the mounting block, the turntable and the three-jaw chuck cooperate to limit the axial displacement of the mounting block along the turntable. When the three-jaw chuck is moved away from the mounting block, it avoids the mounting block, thus facilitating the disassembly of the mounting block and improving the convenience of adjusting the position of the mounting block.

[0014] Optionally, the positioning component includes a horizontal plate, a vertical plate, and an elastic element. The horizontal plate is slidably connected to the mounting block along the length of the slide groove. The vertical plate is perpendicular to the horizontal plate and slidably connected to the positioning block along its length. The elastic element is located between the horizontal plate and the mounting block and is used to push the horizontal plate closer to the vertical plate. The vertical plate has two sets of through openings adapted to the horizontal plate. The mounting block has a connecting block fixed along the length of the slide groove. The connecting block is located in the mounting groove. The slider has a connecting groove adapted to the connecting block.

[0015] By adopting the above technical solution, the horizontal plate, under the action of the elastic element, is inserted into any through-hole, at which point the horizontal plate limits the movement of the vertical plate. When the vertical plate contacts the slider, the mounting block cooperates with the vertical plate to limit the three-jaw chuck. By moving the vertical plate, the slider is fixed. The connecting block cooperates with the connecting groove to limit the slider, which helps to improve the connection stability between the mounting block and the slider.

[0016] Optionally, the turntable has positioning holes along the width of the groove, and both the moving plate and the support plate are slidably connected in the vertical direction with positioning rods that are adapted to the positioning holes.

[0017] By adopting the above technical solution, when the positioning rod is inserted into the positioning hole, both the moving plate and the support plate limit the corresponding turntables through the positioning rod. At this time, the slide grooves of the two turntables are in a horizontal state, which helps to improve the convenience of adding connecting rods and crankshafts.

[0018] Optionally, a vertical frame is fixedly connected to the upper end of the frame, and a movable arm is rotatably connected to the upper end of the vertical frame in the horizontal direction. Two clamping plates are slidably connected to the side of the movable arm near the support plate in the vertical direction. The two clamping plates are symmetrically arranged with the rotation axis of the rotating plate as the center. The movable arm is provided with a bidirectional lead screw for driving the two clamping plates to move.

[0019] By adopting the above technical solution, the vertical frame supports the moving arm. When fixing the connecting rod crankshaft, the moving arm is rotated, causing the moving arm to move the two clamping plates to both sides of the connecting rod crankshaft. The two clamping plates are driven to move closer to each other by two bidirectional lead screws, so that the two clamping plates cooperate to clamp and fix the connecting rod crankshaft, thereby making the two sets of connecting rod shaft axes of the connecting rod crankshaft and the rotation axis of the rotating plate lie in the same plane.

[0020] Optionally, the grinding mechanism includes a base plate, a transverse plate, a support, a grinding wheel, and a grinding motor. The base plate is located at the upper end of the frame and is slidably connected to the frame along its length. The frame is provided with a lead screw for driving the base plate to move. The transverse plate is located at the upper end of the base plate and is slidably connected to the base plate along its width. A push cylinder is fixedly installed on the base plate, and the output end of the push cylinder is fixedly connected to the transverse plate. The support is located at the upper end of the transverse plate. The grinding wheel is rotatably connected to the side of the support near the support plate. The grinding motor is fixedly connected to the transverse plate and is used to drive the grinding wheel to rotate.

[0021] By adopting the above technical solution, under the support of the bracket and the transverse plate, the grinding motor drives the grinding wheel to rotate, and the grinding wheel grinds the connecting rod crankshaft. The push cylinder drives the bracket and grinding wheel to move through the transverse plate. When it is necessary to adjust the position of the grinding wheel along the axial direction, the second lead screw is rotated, which causes the second lead screw to drive the base plate and the transverse plate to move along the length of the frame, thereby facilitating the adjustment of the position of the bracket and the grinding wheel.

[0022] Optionally, the bracket is slidably connected to the transverse plate along the length of the transverse plate, and the transverse plate is rotatably connected to a lead screw three for driving the bracket to move. The output shaft of the grinding motor is coaxially fixed with a spline shaft. The bracket is rotatably connected to a pulley one, the spline shaft passes through the pulley one and is slidably connected to the pulley one, the grinding wheel is coaxially fixed with a pulley two, and a transmission belt is provided between the pulley one and the pulley two. The transmission belt is located outside the pulley one and the pulley two and is tumbledly connected to both.

[0023] By adopting the above technical solution, the grinding motor drives the spline shaft to rotate, which in turn drives all pulleys to rotate synchronously. Pulley 1 drives pulley 2 to rotate via a transmission belt, which in turn drives the grinding wheel to rotate. Multiple sets of supports and grinding wheels are provided, facilitating the grinding of multiple connecting rod shafts of the connecting rod crankshaft. The spacing between the opposing pulley supports of the lead screw 3 is adjusted, making it suitable for processing connecting rod crankshafts of different lengths.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. The turntable positions the mounting block using positioning blocks. With the cooperation of the slider and mounting slot, the mounting block fixes the three-jaw chuck using the positioning assembly. Two sets of mounting blocks are provided; the distance between the two mounting blocks corresponds to the distance between the axes of the two connecting rod shafts of the connecting rod crankshaft, and the openings of the mounting slots of the two mounting blocks face each other. The connecting rod crankshaft is placed between the two turntables, and one end of the connecting rod crankshaft is clamped and fixed by the three-jaw chuck connected to the support plate. A lead screw drives a moving plate closer to the support plate, causing the other three-jaw chuck to cooperate in fixing the connecting rod crankshaft. At this time, the axes of any one set of connecting rod shafts of the connecting rod crankshaft are coaxial with the rotation axis of the turntable. When the drive unit rotates the turntable, the turntable drives the connecting rod crankshaft to rotate via the three-jaw chuck, and the grinding mechanism grinds the connecting rod crankshaft. When it is necessary to process the connecting rod shaft on the other axis of the connecting rod crankshaft, the positioning component is adjusted to release the mounting block from the slider, the two three-jaw chucks are moved along the slide, and the three-jaw chucks are fixed again by another mounting block. After the adjustment of the connecting rod crankshaft is completed, the other set of connecting rod shafts of the connecting rod crankshaft is ground by the grinding mechanism. The movement of the three-jaw chucks is relatively convenient and helps to improve the processing efficiency of the crankshaft connecting rod. 2. The fixed block, straight plate, and rotating rod work together to support the rotation of the drive screw. With the cooperation of the threaded hole, when the drive screw rotates, it drives the positioning block to move along the length of the slide groove. The drive screw also limits the positioning block. When the positioning block moves between the two drive screws, the clearance groove avoids the straight plate. Furthermore, the rotation of either drive screw does not interfere with the other drive screw, which helps to improve the convenience of adjusting the position of the positioning block. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the embodiment.

[0026] Figure 2 This is a schematic diagram designed to highlight the connection between the turntable and the three-jaw chuck.

[0027] Figure 3 This is a schematic diagram designed to highlight the structure of a three-jaw chuck.

[0028] Figure 4This is a schematic diagram designed to highlight the structure of the positioning block.

[0029] Figure 5 This is a schematic diagram designed to highlight the structure of the mounting block.

[0030] Figure 6 This is a schematic diagram designed to highlight the structure of the grinding mechanism.

[0031] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Support plate; 12. Moving plate; 13. Lead screw one; 14. Drive component; 15. Positioning rod; 16. Lead screw two; 2. Grinding mechanism; 21. Base plate; 211. Push cylinder; 22. Transverse plate; 221. Lead screw three; 23. Bracket; 231. Pulley one; 232. Pulley two; 233. Transmission belt; 24. Grinding wheel; 25. Grinding motor; 251. Splined shaft; 3. Turntable; 31. Slide groove; 32. Positioning block; 321. Threaded hole; 322. 323. Gap; 33. Mounting block; 331. Mounting groove; 332. Insert block; 333. Connecting block; 34. Drive screw; 341. Positioning groove; 35. Fixing block; 36. Straight plate; 361. Rotating rod; 37. Rotating block; 371. Insert plate; 372. Positioning hole; 4. Three-jaw chuck; 41. Slider; 411. Connecting groove; 51. Horizontal plate; 52. Vertical plate; 521. Through opening; 53. Elastic element; 61. Vertical frame; 62. Moving arm; 63. Clamping plate; 64. Two-way lead screw. Detailed Implementation

[0032] The present application will be further described in detail below with reference to all the accompanying drawings.

[0033] This application discloses a grinding machine tool for irregular shafts.

[0034] Example: Reference Figure 1 and Figure 2 The system includes a frame 1, with a support plate 11 and a movable plate 12 at the upper end of the frame 1. Both the support plate 11 and the movable plate 12 are rotatably connected to a turntable 3 on their respective sides. The two turntables 3 are coaxially arranged. The support plate 11 is fixedly connected to the frame 1. The movable plate 12 is located at the end of the frame 1 away from the support plate 11, and the movable plate 12 is slidably connected to the frame 1 along the length of the frame 1.

[0035] Reference Figure 1 and Figure 2A trapezoidal block is fixed to the lower end of the movable plate 12. A trapezoidal groove adapted to the trapezoidal block is formed along the length of the frame 1. The trapezoidal block is located within the trapezoidal groove and is slidably connected to the frame 1 along the length of the groove. A lead screw 13 is provided along the length of the trapezoidal groove on the frame 1. The lead screw 13 is rotatably connected to the frame 1, and the frame 1 supports the lead screw 13. The lead screw 13 passes through the trapezoidal block and is threadedly connected to it. When the operator rotates the lead screw 13, the lead screw 13 drives the movable plate 12 to move along the length of the frame 1 via the trapezoidal block.

[0036] Reference Figure 2 and Figure 3 Each of the two turntables 3 has a sliding groove 31 on one side that is close to each other. The sliding groove 31 is set along the diameter direction of the turntable 3. Each turntable 3 is equipped with a three-jaw chuck 4. A slider 41 is fixed to the three-jaw chuck 4. The slider 41 is inserted into the sliding groove 31 and is slidably connected to the turntable 3 along the length direction of the sliding groove 31. The turntable 3 limits the three-jaw chuck 4 through the cooperation of the sliding groove 31 and the slider 41, so that the three-jaw chuck 4 moves when the turntable 3 rotates.

[0037] Reference Figure 3 and Figure 4 The turntable 3 has multiple positioning blocks 32 along the length of the slide groove 31. The turntable 3 has two through slots along the length of the slide groove 31, with the slide groove 31 located between the two through slots. The positioning blocks 32 are located on the side of the turntable 3 away from the three-jaw chuck 4, and both ends of the positioning blocks 32 extend through the through slots towards the three-jaw chuck 4. The two through slots cooperate to limit the positioning blocks 32, allowing them to move along the length of the slide groove 31.

[0038] Reference Figure 2 and Figure 4 The turntable 3 is rotatably connected to a drive screw 34, which corresponds one-to-one with a positioning block 32. All drive screws 34 are coaxially arranged. The turntable 3 is fixed with two fixing blocks 35, which are located at both ends of the slide groove 31. All drive screws 34 are located between the two fixing blocks 35, and the drive screws 34 at the ends are rotatably connected to the fixing blocks 35. A straight plate 36 is provided between adjacent drive screws 34. The straight plate 36 is fixedly connected to the turntable 3, and rotating rods 361 are fixed on both sides of the straight plate 36. The rotating rods 361 rotate coaxially with the drive screws 34.

[0039] Reference Figure 2 and Figure 4The straight plate 36 supports the drive screw 34 via the rotating rod 361, causing the drive screw 34 to rotate around its own axis. The positioning block 32 has a threaded hole 321 that matches the drive screw 34. The drive screw 34 passes through the threaded hole 321 of the corresponding positioning block 32 and is threadedly engaged with the positioning block 32. Under the limiting action of the turntable 3, when the drive screw 34 rotates, it drives the positioning block 32 to move along the length of the through groove.

[0040] Reference Figure 2 and Figure 4 The positioning block 32 has a clearance groove 322 communicating with the threaded hole 321. The clearance groove 322 is adapted to the straight plate 36. When the positioning block 32 moves between the two drive screws 34, it avoids the straight plate 36 through the clearance groove 322, thereby facilitating the movement of the positioning block 32 between the two drive screws 34. A drive screw 34 is sleeved on the outside of the drive screw 34. The drive screw 34 passes through the rotating block 37 and does not contact the rotating block 37.

[0041] Reference Figure 2 and Figure 4 The drive screw 34 has two positioning slots 341 along its axial direction. The rotating block 37 has a mounting plate 371 that fits into the positioning slots 341. The mounting plate 371 is inserted into the positioning slots 341 and fits against the inner wall of the positioning slots 341. With the cooperation of the mounting plate 371 and the positioning slots 341, the rotating block 37 rotates, driving the drive screw 34 to rotate, which improves the convenience of rotating the drive screw 34. The drive screws 34 rotate independently, thus facilitating the adjustment of individual positioning blocks 32.

[0042] Reference Figure 2 and Figure 5 The turntable 3 is provided with a mounting block 33 corresponding to the positioning block 32. The mounting block 33 is located between the turntable 3 and the three-jaw chuck 4. The mounting block 33 is fixed with an insert block 332. The side of the positioning block 32 near the three-jaw chuck 4 is provided with a slot 323 that is adapted to the insert block 332 (see reference). Figure 4 Insert 332 is inserted into slot 323 (see reference) Figure 4 ) inside and with slot 323 (reference) Figure 4 The inner wall is fitted. The positioning block 32 is connected to the slot 323 (see reference). Figure 4 The insertion block 332 is limited, thereby restricting the displacement of the mounting block 33 along the radial direction of the turntable 3.

[0043] Reference Figure 2 and Figure 5At least two mounting blocks 33 are provided. In this embodiment, two mounting blocks 33 are used as an example. The two mounting blocks 33 are arranged along the length direction of the slide groove 31. The mounting blocks 33 have mounting grooves 331 that are adapted to the slider 41. The openings of the mounting grooves 331 of the two mounting blocks 33 face each other. In the initial state, the slider 41 is inserted into the mounting groove 331 near the position of the three-jaw chuck 4. The mounting blocks 33 are fixed with connecting blocks 333. The slider 41 (refer to...) Figure 3 A connecting groove 411 adapted to the connecting block 333 is provided. When the slider 41 is located in the mounting groove 331, the connecting block 333 is located in the connecting groove 411 and the inner wall of the connecting groove 411 is in contact, which helps to improve the connection stability between the mounting block 33 and the slider 41.

[0044] Reference Figure 3 and Figure 5 The mounting block 33 is equipped with a positioning assembly, which includes a horizontal plate 51, a vertical plate 52, and an elastic element 53. The horizontal plate 51 is slidably connected to the mounting block 33, and its movement direction is parallel to that of the slide groove 31 (see reference). Figure 2 The length direction is parallel. When the mounting block 33 moves, it drives the horizontal plate 51 to move. The mounting block 33 has a vertical hole that communicates with the mounting groove 331. The vertical hole and the sliding groove 31 (see reference) Figure 2 It is set vertically. The vertical plate 52 is located inside the vertical hole and is slidably connected to the mounting block 33 along the axis of the vertical hole.

[0045] Reference Figure 2 and Figure 5 One end of the horizontal plate 51 is directly opposite the vertical plate 52. The elastic element 53 is a spring, one end of which is fixedly connected to the horizontal plate 51, and the other end is fixedly connected to the mounting block 33. The spring is in a deformed state, applying a force to the horizontal plate 51 towards the vertical plate 52. The vertical plate 52 has two through holes 521 along its length. When the horizontal plate 51 is inserted into the through hole 521 near the positioning block 32, the displacement of the vertical plate 52 along the vertical hole axis is limited. At this time, the vertical plate 52 is completely outside the mounting groove 331, making it less likely for the vertical plate 52 to interfere with the movement of the slider 41 within the mounting groove 331.

[0046] Reference Figure 3 and Figure 5 When the slider 41 of the three-jaw chuck 4 is in the mounting groove 331, the operator releases the horizontal plate 51 from limiting the vertical plate 52 and moves the vertical plate 52 along the vertical hole, so that the vertical plate 52 enters the mounting groove 331 and fits against the slider 41. At this time, the mounting block 33 limits the slider 41 through the vertical plate 52, so that the slider 41 is located in the mounting groove 331 and is in a positioning state.

[0047] Reference Figure 3 and Figure 5When the horizontal plate 51 abuts against the mounting block 33, the horizontal plate 51, driven by the elastic element 53, is inserted into the through-hole 521 away from the positioning block 32. At this time, the horizontal plate 51 again limits the vertical plate 52, which helps to improve the working stability of the vertical plate 52 when positioning the slider 41. In other embodiments, the positioning component can also be a combination of bolts and pins, which can restrict the slider 41 within the mounting groove 331.

[0048] Reference Figure 1 and Figure 2 Both the movable plate 12 and the support plate 11 are vertically slidably connected to positioning rods 15. Under the limiting action of the support plate 11 or the movable plate 12, the positioning rods 15 only move vertically in the working state. The turntable 3 has positioning holes 372 that are adapted to the positioning rods 15, and the positioning holes 372 are perpendicular to the slide grooves 31. In the initial state, the positioning rods 15 are inserted into the positioning holes 372, and at this time, both turntables 3 are in the positioning state, and the two slide grooves 31 are parallel to each other.

[0049] Reference Figure 1 and Figure 2 When grinding the connecting rod crankshaft, the operator places the connecting rod crankshaft between two three-jaw chucks 4, and clamps and fixes one end of the connecting rod crankshaft using the three-jaw chuck 4 near the support plate 11. At this time, by rotating the lead screw 13, the lead screw 13 drives the moving plate 12 closer to the support plate 11, and clamps and fixes the other end of the connecting rod lead screw using the three-jaw chuck 4 near the moving plate 12. At this time, the two three-jaw chucks 4 cooperate to support and fix the connecting rod crankshaft.

[0050] Reference Figure 1 and Figure 2 A vertical frame 61 is fixed to the upper end of the frame 1. The vertical frame 61 is located on one side of the frame 1 along its width. A movable arm 62 is rotatably connected to the upper end of the vertical frame 61 in the horizontal direction. The movable arm 62 moves to a position perpendicular to the frame 1. Two sets of clamping plates 63 are provided at the end of the movable arm 62 near the support plate 11. Both clamping plates 63 are slidably connected to the movable arm 62 in the vertical direction. When the movable arm 62 moves, it drives the clamping plates 63 to move. A bidirectional lead screw 64 is rotatably connected to the movable arm 62 in the vertical direction. The two ends of the bidirectional lead screw 64 pass through the two clamping plates 63 respectively and are threadedly connected to the clamping plates 63.

[0051] Reference Figure 1 and Figure 2After both three-jaw chucks 4 have secured the connecting rod crankshaft, the clamping on the connecting rod crankshaft is loosened to release the limitation on its rotation. The operator rotates the moving arm 62, causing it to move the two clamping plates 63 to the upper and lower sides of the connecting rod crankshaft. The two clamping plates 63 are symmetrically arranged around the axis of the turntable. At this time, the operator rotates the double-acting screw 64, causing it to move the two clamping plates 63 towards the connecting rod crankshaft synchronously. After both clamping plates 63 come into contact with the connecting rod crankshaft, they limit its movement, ensuring that the axes of all connecting rod shafts are in the same plane as the rotation axis of the turntable 3.

[0052] Reference Figure 1 and Figure 2 The support plate 11 is provided with a driving component 14. In this embodiment, the driving component 14 is a motor. The motor is used to drive the turntable 3 close to the support plate 11 to rotate. When the turntable 3 rotates, it drives the connecting rod crankshaft to rotate through the three-jaw chuck 4. Under the connection of the connecting rod crankshaft, the two turntables 3 achieve synchronous rotation.

[0053] Reference Figure 2 and Figure 5 Before grinding, the operator adjusts the positioning block 32 according to the number of axes of the connecting rod shaft. In this embodiment, the connecting rod crankshaft has two sets of connecting rod shafts with different axes, so it is necessary to adjust the distance between the two positioning blocks 32. One set of positioning blocks 32 is connected to the mounting block 33, and this positioning block 32 is set as the first positioning block. The other adjusted positioning block 32 is set as the second positioning block. At this time, the second positioning block does not need to be connected to the mounting block 33. When the slider 41 of the three-jaw chuck 4 (reference) Figure 3 After being connected to the mounting block 33, one set of connecting rod shafts of the connecting rod crankshaft fixed by the three-jaw chuck 4 is coaxial with the rotation axis of the turntable 3, so that the distance between the center points of the two positioning blocks 32 corresponds to the distance between the axes of the two sets of connecting rod shafts.

[0054] Reference Figure 1 and Figure 6 The frame 1 is also equipped with a grinding mechanism 2, which includes a base plate 21, a transverse plate 22, a support 23, a grinding wheel 24, and a grinding motor 25. The base plate 21 is located at the upper end of the frame 1 and is slidably connected to the frame 1 along its length. A second lead screw 16 is rotatably connected to the frame 1 along its length. The second lead screw 16 passes through the base plate 21 and is threadedly connected to it. Under the support and guidance of the frame 1, when the operator rotates the second lead screw 16, the second lead screw 16 drives the base plate 21 to move along the length of the frame 1.

[0055] Reference Figure 1 and Figure 6The transverse plate 22 is located at the upper end of the base plate 21 and is slidably connected to the base plate 21 along the width direction of the frame 1. When the base plate 21 moves along the length direction, it drives the transverse plate 22 to move synchronously. A push cylinder 211 is installed on one side of the base plate 21. The output end of the push cylinder 211 is fixedly connected to the transverse plate 22. The operator manipulates the push cylinder 211 to move the transverse plate 22 along the width direction of the frame 1.

[0056] Reference Figure 1 and Figure 6 Multiple supports 23 are provided, each mounted on the upper end of the transverse plate 22, and all supports 23 are slidably connected to the transverse plate 22 along its length. When the transverse plate 22 moves, it causes all supports 23 to move synchronously. The transverse plate 22 is rotatably connected to lead screws 221 corresponding to each support 23, which pass through and are threadedly connected to the supports 23. Supported by the transverse plate 22, when the operator rotates the lead screws 221, the lead screws 221 cause the supports 23 to move along the length of the transverse plate 22, thus facilitating the adjustment of the gap between adjacent supports 23.

[0057] Reference Figure 1 and Figure 6 A grinding wheel 24 is rotatably connected to the upper end of the bracket 23. The grinding wheel 24 is existing technology and will not be described in detail here. The grinding wheel 24 is located on the side of the bracket 23 closest to the support plate 11, and the rotation axis of the grinding wheel 24 and the turntable 3 are on the same horizontal plane. Furthermore, the grinding wheel 24 corresponds one-to-one with the connecting rod shaft of the crankshaft connecting rod. When the bracket 23 moves, it drives the grinding wheel 24 to move synchronously. The operator uses a drive cylinder to move the transverse plate 22 closer to the connecting rod crankshaft, causing the grinding wheel 24 to move towards the corresponding connecting rod shaft.

[0058] Reference Figure 1 and Figure 6 The grinding motor 25 is mounted on the upper end of the transverse plate 22, so that the grinding motor 25 moves when the transverse plate 22 moves. A splined shaft 251 is coaxially fixed to the output end of the grinding motor 25, and the operator drives the splined shaft 251 to rotate through the grinding motor 25. The bracket 23 is rotatably connected to the pulley 231, and the splined shaft 251 passes through the pulley 231 and is coaxially set with the pulley 231. When the splined shaft 251 rotates, it drives the pulley 231 to rotate. The grinding wheel 24 is coaxially fixed with a pulley 232. When the pulley 232 rotates, it drives the grinding wheel 24 to rotate synchronously. A transmission belt 233 is provided between the pulley 1 231 and the pulley 232. Both the pulley 1 231 and the pulley 232 are located inside the transmission belt 233 and are rolledly connected to the transmission belt 233. When the pulley 1 231 rotates, it drives the pulley 232 to rotate through the transmission belt 233, which in turn drives the grinding wheel 24 to rotate.

[0059] Reference Figure 1and Figure 6 By pushing the cylinder 211 to drive the grinding wheel 24 to move closer to or away from the connecting rod shaft, the rotating grinding wheel 24 grinds the connecting rod shaft and grinds multiple connecting rod shafts at the same time, which helps to improve the processing efficiency of the connecting rod shaft.

[0060] Reference Figure 2 and Figure 5 After the grinding of a set of connecting rod shafts is completed, the operator releases the mounting block 33 from the positioning of the three-jaw chuck 4 and connects another mounting block 33 to the second positioning block, with the mounting grooves 331 of the two mounting blocks 33 facing each other. At this time, the operator moves the connecting rod crankshaft along the length of the slide groove 31, causing the three-jaw chuck 4 to move along the slide groove 31 towards the second positioning block. The second positioning block performs secondary positioning of the three-jaw chuck 4 through the mounting block 33. When the three-jaw chuck 4 is moved, it drives the connecting rod crankshaft to move synchronously.

[0061] Reference Figure 1 and Figure 2 After the three-jaw chuck 4 performs a secondary positioning of the connecting rod crankshaft, the other set of unground connecting rod shafts moves to a position coaxial with the rotation axis of the turntable 3. This facilitates grinding the second set of connecting rod shafts and makes adjusting the orientation of the connecting rod crankshaft more convenient. By adjusting the number of positioning blocks 32, it is beneficial to process irregular shafts with multiple shaft segments of different axes. When grinding two different sets of connecting rod shafts, the operator does not need to re-clamp the connecting rod crankshaft, which helps to improve the processing efficiency of the crankshaft and connecting rod.

[0062] The working principle of a non-circular shaft grinding machine tool according to an embodiment of this application is as follows: By rotating the rotating component, the rotating component drives the drive screw 34 to rotate. Under the limiting action of the turntable 3, the drive screw 34 drives the positioning block 32 to move along the length direction of the slide groove 31, thereby adjusting the position of the positioning block 32. The two positioning blocks 32 after adjustment are respectively designated as the first positioning block and the second positioning block. The first positioning block is fixed to the three-jaw chuck 4 by the mounting block 33, so that the two three-jaw chucks 4 cooperate to fix the connecting rod crankshaft. The drive component 14 drives the turntable 3 to rotate, so that the turntable 3 drives the connecting rod crankshaft to rotate through the three-jaw chuck 4, and performs grinding processing on a set of connecting rod shafts of the connecting rod crankshaft through the grinding wheel 24. When another set of connecting rod shafts needs to be processed, the operator first releases the limiting position of the mounting block 33 on the three-jaw chuck 4, and connects the other mounting block 33 to the second positioning block. The three-jaw chuck 4 is moved from the first positioning block to the second positioning block along the slide groove 31. The second positioning block performs secondary positioning of the three-jaw chuck 4 through the mounting block 33. When the three-jaw chuck 4 moves, it drives the connecting rod crankshaft to move, thereby moving the other set of connecting rod shafts of the connecting rod crankshaft to a position coaxial with the rotation axis of the turntable 3. The other set of connecting rod shafts is then ground again by the grinding wheel. When grinding the connecting rod shafts of the connecting rod crankshaft, the operator does not need to repeatedly clamp the connecting rod crankshaft between multiple machines. At the same time, it is more convenient to adjust the position of the connecting rod crankshaft, which helps to shorten the operation time and improve the processing efficiency of the connecting rod crankshaft.

[0063] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A grinding machine tool for irregular shafts, comprising a frame (1), characterized in that: The upper end of the frame (1) is provided with a grinding mechanism (2). One end of the frame (1) is fixedly connected to a support plate (11), and the other end is provided with a moving plate (12). The moving plate (12) is slidably connected to the frame (1) along the length direction of the frame (1). The frame (1) is provided with a lead screw (13) for driving the moving plate (12) to move. Both the support plate (11) and the moving plate (12) are rotatably connected to a turntable (3) along the vertical direction. The support plate (11) is fixedly connected to a driving component (14) for driving the turntable (3) to rotate. The two turntables (3) are provided with a sliding groove (31) on the side that is close to each other. The sliding groove (31) is along the diameter direction of the turntable (3). The turntable (3) is equipped with a three-jaw chuck (4), and the three-jaw chuck (4) is fixedly equipped with a slider (41) adapted to the slide groove (31). The slider (41) is inserted into the slide groove (31) and is slidably connected to the turntable (3) along the length direction of the slide groove (31). The turntable (3) is provided with a number of positioning blocks (32) distributed along the length direction of the slide groove (31). The positioning block (32) is detachably connected to a mounting block (33) on the side near the three-jaw chuck (4). The mounting block (33) is provided with a mounting groove (331) adapted to the slider (41), and the mounting block (33) is provided with a positioning component for fixing the slider (41) in the mounting groove (331).

2. The special-shaped shaft grinding machine tool according to claim 1, characterized in that: The positioning block (32) is slidably connected to the turntable (3) along the length of the slide groove (31). Several drive screws (34) are provided along the length of the turntable (3) on the side opposite to the three-jaw chuck (4). All drive screws (34) are parallel to the slide groove (31) and coaxial with each other. Fixed blocks (35) are fixedly connected to both ends of the turntable (3). The drive screws (34) at the ends are rotatably connected to the fixed blocks (35). A straight plate (36) is provided between adjacent drive screws (34). Rotating rods (361) are fixedly connected to both sides of the plate. The rotating rods (361) are inserted into the drive screw (34) and are rotatably connected to the drive screw (34). The positioning block (32) has a threaded hole (321) that is adapted to the drive screw (34). The drive screw (34) passes through the threaded hole (321) and is threadedly engaged with the threaded hole (321). The positioning block (32) also has a relief groove (322) that communicates with the threaded hole (321). The relief groove (322) is adapted to the support plate (11).

3. The special-shaped shaft grinding machine tool according to claim 2, characterized in that: The drive screw (34) has two positioning grooves (341) along its length. The two positioning grooves (341) are symmetrically arranged with the axis of the drive screw (34) as the center. The positioning grooves (341) pass through the external thread of the drive screw (34). A rotating block (37) is sleeved on the outside of the drive screw (34). A plate (371) is fixedly connected to the rotating block (37). The plate (371) is inserted into the positioning groove (341) and is slidably connected to the drive screw (34) along the length of the positioning groove (341).

4. The special-shaped shaft grinding machine tool according to claim 1, characterized in that: The mounting block (33) is fixedly connected to the side of the turntable (3) with a plug (332). The positioning block (32) has a slot (323) that matches the plug (332). The plug (332) is inserted into the corresponding slot (323). One side of the mounting block (33) is in contact with the turntable (3), and the other side is in contact with the three-jaw chuck (4).

5. The special-shaped shaft grinding machine tool according to claim 1, characterized in that: The positioning assembly includes a horizontal plate (51), a vertical plate (52), and an elastic element (53). The horizontal plate (51) is slidably connected to the mounting block (33) along the length of the slide groove (31). The vertical plate (52) is perpendicular to the horizontal plate (51) and is slidably connected to the positioning block (32) along the length. The elastic element (53) is located between the horizontal plate (51) and the mounting block (33) and is used to push the horizontal plate (51) closer to the vertical plate (52). The vertical plate (52) has two sets of through holes (521) adapted to the horizontal plate (51). The mounting block (33) has a connecting block (333) fixed along the length of the slide groove (31). The connecting block (333) is located in the mounting groove (331). The slider (41) has a connecting groove (411) adapted to the connecting block (333).

6. The special-shaped shaft grinding machine tool according to claim 1, characterized in that: The turntable (3) has a positioning hole (372) along the width direction of the slide groove (31), and the moving plate (12) and the support plate (11) are both slidably connected in the vertical direction with positioning rods (15) that are adapted to the positioning hole (372).

7. The special-shaped shaft grinding machine tool according to claim 1, characterized in that: The upper end of the frame (1) is fixedly connected to a vertical frame (61), and the upper end of the vertical frame (61) is rotatably connected to a movable arm (62) in the horizontal direction. The movable arm (62) is slidably connected to two clamping plates (63) in the vertical direction on the side near the support plate (11). The two clamping plates (63) are symmetrically arranged with the rotation axis of the rotating plate as the center. The movable arm (62) is provided with a bidirectional screw (64) for driving the two clamping plates (63) to move.

8. The special-shaped shaft grinding machine tool according to claim 1, characterized in that: The grinding mechanism (2) includes a base plate (21), a transverse plate (22), a bracket (23), a grinding wheel (24), and a grinding motor (25). The base plate (21) is located at the upper end of the frame (1) and is slidably connected to the frame (1) along the length direction of the frame (1). The frame (1) is provided with a lead screw (16) for driving the base plate (21) to move. The transverse plate (22) is located at the upper end of the base plate (21) and is slidably connected to the base plate (21) along the width direction of the frame (1). The base plate (21) is fixedly provided with a push cylinder (211). The output end of the push cylinder (211) is fixedly connected to the transverse plate (22). The bracket (23) is located at the upper end of the transverse plate (22). The grinding wheel (24) is rotatably connected to the side of the bracket (23) near the support plate (11). The grinding motor (25) is fixedly connected to the transverse plate (22) and is used to drive the grinding wheel (24) to rotate.

9. A special-shaped shaft grinding machine tool according to claim 8, characterized in that: The bracket (23) is slidably connected to the transverse plate (22) along the length of the transverse plate (22). The transverse plate (22) is rotatably connected to a lead screw (221) for driving the bracket (23) to move. The output shaft of the grinding motor (25) is coaxially fixed with a spline shaft (251). The bracket (23) is rotatably connected to a pulley (231). The spline shaft (251) passes through the pulley (231) and is slidably connected to the pulley (231). The grinding wheel (24) is coaxially fixed with a pulley (232). A transmission belt (233) is provided between the pulley (231) and the pulley (232). The transmission belt (233) is located outside the pulley (231) and the pulley (232) and is tumbledly connected to both.

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