Edge grinding device for piston skirt casting processing

Abstract

This invention discloses an edge grinding device for piston skirt casting, belonging to the field of piston skirt processing technology. The invention comprises an electric telescopic rod, a movable platform, a T-shaped turntable, a pusher groove, movable balls, rubber ring one, and rubber ring two. The top bar is pulled open by a pin shaft, pushing the clamping top blocks outwards, causing multiple clamping top blocks to tightly adhere to the inner wall of the piston skirt body, completing the automatic centering and clamping fixation of the piston skirt body. After the movable platform drives the piston skirt body to press against the grinding belt, rubber ring one on the outer side of the conical seat and rubber ring two on the outer side of the I-shaped seat are tightly pressed together. Driven by a drive motor, transmission wheels one and two drive the I-shaped seat to rotate. Under the friction of rubber ring one and rubber ring two, the T-shaped turntable drives the piston skirt body to rotate slowly around its own axis, pressing against the grinding belt, thereby achieving comprehensive grinding of the piston skirt body's surface edges.

Description

Technical Field

[0001] This invention relates to the field of piston skirt processing technology, specifically to an edge grinding device for piston skirt casting processing. Background Technology

[0002] As the core moving component of an internal combustion engine, the piston skirt plays a crucial role in guiding piston movement, bearing pressure in the cylinder, and reducing friction. Its machining accuracy directly determines the smoothness of the internal combustion engine's operation, sealing performance, and overall service life. Piston skirts are mostly formed using casting processes. During the casting process, burrs and flash are easily generated on the edges, and uneven casting defects are formed on the surface. If these defects are not precisely ground, they will lead to uneven clearance between the piston skirt and the cylinder, causing abnormal noise and jamming during operation, and even aggravating the wear of the cylinder and piston. Therefore, precise grinding of the edges after casting is an indispensable core process in the piston skirt machining process, with stringent industry requirements for the clamping stability, grinding uniformity, and operating efficiency of the grinding equipment.

[0003] Most existing piston skirt casting edge grinding devices require manual clamping and fixing of the piston skirt. This not only increases the labor intensity of operators, but also results in insufficient centering accuracy of manual clamping, which can easily lead to displacement and shaking of the piston skirt during grinding. This causes uneven grinding force, uneven grinding of the piston skirt edge, and the existence of grinding blind spots, making it impossible to achieve uniform grinding of the entire surface. This seriously affects the processing accuracy of the piston skirt. At the same time, the grinding belt of the grinding device is prone to deformation and loosening during operation due to the compression of the piston skirt. The loose grinding belt will further exacerbate the reduction in grinding accuracy, resulting in problems such as messy grinding patterns and inconsistent edge chamfers. Metal chips generated during grinding are easy to adhere to the surface of the grinding belt. After the chips accumulate on the surface of the grinding belt, they will not only scratch the grinding surface of the piston skirt, causing secondary damage, but also accelerate the wear of the grinding belt.

[0004] Based on this, the present invention designs an edge grinding device for piston skirt casting to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide an edge grinding device for piston skirt casting, which solves the problems mentioned in the background art. Most existing edge grinding devices for piston skirt casting require manual clamping and fixing of the piston skirt, which not only increases the labor intensity of operators but also results in insufficient centering accuracy and easily leads to piston skirt displacement and shaking during grinding, causing uneven grinding force, uneven grinding of the piston skirt edge, and the existence of grinding blind spots. This makes it impossible to achieve uniform grinding of the entire surface, seriously affecting the processing accuracy of the piston skirt. Furthermore, during operation, the grinding belt of the grinding device is prone to deformation and loosening due to the pressure of the piston skirt. A loose grinding belt further exacerbates the reduction in grinding accuracy, resulting in problems such as messy grinding patterns and inconsistent edge chamfers. Metal debris generated during grinding easily adheres to the surface of the grinding belt. The accumulation of debris on the grinding belt surface not only scratches the piston skirt grinding surface, causing secondary damage, but also accelerates the wear of the grinding belt.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An edge grinding device for piston skirt casting includes a base, the base including a mounting frame, a mounting top frame fixedly mounted on one side of the top of the mounting frame, T-shaped slide bars fixedly connected to the bottom of the two ends of the mounting top frame on both sides of the mounting frame, a movable clamping mechanism slidably mounted through the surfaces of the two T-shaped slide bars on the top of the mounting frame, three piston skirt bodies equidistantly placed on the top of the movable clamping mechanism, and electric telescopic rods fixedly mounted on both sides of the mounting top frame, with the telescopic ends of the electric telescopic rods fixedly connected to the two ends of the movable clamping mechanism through rectangular blocks;

[0008] A trapezoidal plate is fixedly connected to the side of the mounting base away from the mounting top frame. Three push grooves are equidistantly arranged on the surface of the trapezoidal plate. A vacuum dust collection mechanism is fixedly installed at the bottom of the mounting top frame near the trapezoidal plate. A transmission mechanism is provided between the bottom of the mounting top frame and the trapezoidal plate. A grinding mechanism is provided inside the mounting top frame. Rectangular through slots are respectively provided at the center of the top and bottom of the mounting top frame. A pressure cleaning mechanism is fixedly installed at the position corresponding to the rectangular through slot on the mounting top frame.

[0009] As a further embodiment of the present invention, the push chute consists of two horizontal chute sections and one inclined chute section. The two horizontal chute sections are not at the same horizontal height, and the two horizontal chute sections are respectively connected to the two ends of the inclined chute.

[0010] As a further embodiment of the present invention, the movable clamping mechanism includes a movable platform, with both ends of the movable platform slidably connected to the surface of a T-shaped slide bar. Three T-shaped turntables are equidistantly mounted on the top of the movable platform via bearings, and the positions of the T-shaped turntables correspond to the positions of the push slide grooves. A fixed column is fixedly mounted at the center of the top of the T-shaped turntables. A top plate is fixedly mounted on the top of the fixed column. A sliding ring is slidably mounted on the surface of the bottom end of the fixed column. Multiple rotating seats are fixedly mounted at equal angles on the outer circular surfaces of the top plate and the sliding ring, and the rotating seats on the outer circular surfaces of the top plate and the sliding ring are paired and aligned. A top bar is rotatably mounted inside the rotating seat via a pin. A clamping top block is rotatably mounted on the end of two top bars away from the rotating seat via a pin, and the clamping top block is in close contact with the inner wall of the piston skirt body.

[0011] As a further embodiment of the present invention, a push plate is slidably installed inside the bottom end of the fixed column, and the push plate is fixedly connected to the inner wall of the sliding ring through the surface of the bottom end of the fixed column via a protrusion. A push rod is fixedly installed at the bottom of the push plate, and the bottom end of the push rod extends through the fixed column and the T-shaped turntable to the bottom end of the T-shaped turntable. A ball seat is fixedly installed at one end of the push rod at the bottom of the T-shaped turntable. A movable ball is rolled and installed at the bottom of the ball seat, and the movable ball is rolled and connected inside the push groove. A return spring is sleeved on the surface of the bottom end of the push rod between the T-shaped turntable and the ball seat. A conical seat is fixedly installed at the edge of the bottom end of the T-shaped turntable, and a rubber ring is sleeved on the outer circular surface of the conical seat.

[0012] As a further embodiment of the present invention, the transmission mechanism includes a first transmission wheel, on which two transmission belts are symmetrically sleeved. A second transmission wheel is respectively mounted on the inner wall of the two transmission belts away from the first transmission wheel. The bottom ends of the first and second transmission wheels are rotatably connected to one side of a trapezoidal plate via bearings. I-shaped seats are fixedly connected to the top ends of the first and second transmission wheels, and the top of the I-shaped seats is rotatably connected to a mounting bracket via bearings. A second rubber ring is sleeved on the surface of the I-shaped seat, and the second rubber ring is tightly fitted to the first rubber ring. A linkage turntable is fixedly connected to the bottom end of the first transmission wheel through the trapezoidal plate. A drive motor is fixedly mounted at the center of the bottom of the mounting bracket, located on one side of the pressure cleaning mechanism. An active turntable is fixedly connected to the output end of the drive motor, and a linkage bar is rotatably connected to the bottom edges of the linkage turntable and the active turntable via protrusions.

[0013] As a further embodiment of the present invention, the grinding mechanism includes two grinding rollers. The two grinding rollers are rotatably connected to the two ends of the mounting frame near the T-shaped slide bar inside the mounting frame via bearings. One grinding roller has a bevel gear fixedly connected to its top end through the mounting frame. A grinding motor is fixedly connected to the top of the mounting frame near the bevel gear, and a bevel gear is fixedly connected to the output end of the grinding motor. The bevel gear and the bevel gear mesh with each other. A grinding belt is sleeved on the surface of the two grinding rollers. Multiple support rollers are rotatably mounted inside the mounting frame between the two grinding rollers via bearings. The two support rollers form a group, and each group of support rollers corresponds to the position of the piston skirt body.

[0014] As a further embodiment of the present invention, the clamping cleaning mechanism includes two movable seats. Each movable seat has a mounting slide rod slidably mounted on both sides. The two mounting slide rods form a group. Each group of mounting slide rods has an end plate fixedly mounted on both ends. The two groups of end plates are fixedly connected to the two sides of the rectangular through groove at the top and bottom of the mounting frame. A clamping spring is sleeved on the surface of each mounting slide rod on one side of the movable seat. A clamping roller is rotatably mounted between the two movable seats through a bearing, and the clamping roller is pressed against the inner wall of the grinding belt.

[0015] As a further embodiment of the present invention, mounting grooves are respectively provided on both sides of the movable seat between the mounting slide rod one and the pressure roller. The mounting slide rod two is fixedly installed on the inner wall of the mounting groove, and a movable slider is slidably installed on the surface of the mounting slide rod two. A pressure spring two is sleeved on the surface of the mounting slide rod two located on one side of the movable slider. A cleaning roller is rotatably installed between the two movable sliders through a rotating shaft, and the cleaning roller is in close contact with the outer surface of the grinding belt.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This invention comprises an electric telescopic rod, a movable platform, a T-shaped turntable, a pusher groove, movable balls, rubber ring one, and rubber ring two. When the electric telescopic rod extends and pushes the movable platform away from the grinding mechanism, the piston skirt body is aligned and fitted onto the outside of the clamping top block. Controlling the retraction of the electric telescopic rod pulls the movable platform closer to the grinding mechanism. At this time, the movable balls at the bottom end of the pusher rod at the bottom of the T-shaped turntable roll along the pusher groove on the surface of the trapezoidal plate from the low horizontal section to the inclined section and then to the high horizontal section. Under the height guidance of the pusher groove, the movable balls push the pusher rod upwards, causing the pusher slide plate inside the fixed column to move upwards. Simultaneously, the sliding ring on the outside of the fixed column moves upwards along the column body. During the process, the top bar between the outer circular rotating seat and the outer circular rotating seat of the top plate is pulled open by the pin shaft, thereby pushing the clamping top block outward, so that multiple clamping top blocks are tightly attached to the inner wall of the piston skirt body, completing the automatic centering and clamping fixation of the piston skirt body. Until the moving platform drives the piston skirt body to stick to the grinding belt, the rubber ring one on the outer side of the conical seat and the rubber ring two on the outer side of the I-shaped seat are tightly attached. Under the drive of the drive motor, the transmission wheel one and the transmission wheel two drive the I-shaped seat to rotate. Under the friction of the rubber ring one and the rubber ring two, the T-shaped turntable drives the piston skirt body to rotate slowly around its own axis and stick to the grinding belt, thereby realizing the comprehensive grinding of the edge of the piston skirt body surface.

[0018] 2. This invention, by setting up a grinding belt, a pressure spring, a pressure roller, and a cleaning roller, ensures that when the piston skirt body is clamped, rotated, and pressed against the outer surface of the grinding belt, the grinding belt undergoes localized deformation and loosening due to the workpiece's squeezing force. At this time, under the elastic rebound of the pressure spring, the pressure roller of the clamping and cleaning mechanism pushes the moving seat along the mounting slide rod towards the inner ring of the grinding belt, making the pressure roller tightly adhere to the inner ring of the grinding belt. This ensures that the grinding belt always remains taut and taut, avoiding problems such as uneven grinding force and uneven grinding texture caused by the loosening of the grinding belt, thus guaranteeing... The piston skirt grinding precision is achieved when the grinding belt is pressed by the pressure roller and rotates at high speed to grind the piston skirt body. Metal debris generated during the grinding operation will adhere to the outer surface of the grinding belt. Under the elastic rebound of the pressure spring two, the cleaning roller pushes the moving slider to slide along the mounting slide rod two towards the outer ring of the grinding belt, so that the cleaning roller is tightly pressed against the outer ring surface of the grinding belt. When the grinding belt rotates at high speed, the cleaning roller rotates passively with the grinding belt. Through relative friction with the grinding belt, the debris and dust attached to the surface of the grinding belt are thoroughly scraped and cleaned, preventing debris from accumulating on the surface of the grinding belt. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0022] Figure 3 This is a cross-sectional view of the mounting frame and grinding belt of the present invention.

[0023] Figure 4 This is a schematic diagram of the mounting base and mounting top frame of the present invention;

[0024] Figure 5 A cross-sectional view of the mounting frame and T-shaped turntable of this invention;

[0025] Figure 6 This is a cross-sectional view of the T-shaped turntable and top bar of the present invention;

[0026] Figure 7 This is a schematic diagram of the trapezoidal plate and I-shaped base of the present invention;

[0027] Figure 8 This is a schematic diagram of the structure of the transmission wheel and transmission belt of the present invention;

[0028] Figure 9 This is a cross-sectional view of the linkage turntable and drive motor of the present invention.

[0029] Figure 10 This is a schematic diagram of the structure of the grinding belt and the pressure roller of the present invention;

[0030] Figure 11 This is a cross-sectional view of the movable seat and cleaning roller of the present invention.

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 1. Base; 101. Mounting base frame; 102. Mounting top frame; 103. T-shaped slide bar; 104. Trapezoidal plate; 105. Push slide groove; 106. Rectangular through groove; 2. Moving clamping mechanism; 201. Moving platform; 202. T-shaped turntable; 203. Fixed column; 204. Top plate; 205. Sliding ring; 206. Rotating seat; 207. Top bar; 208. Clamping top block; 209. Push slide plate; 210. Push top rod; 211. Ball bearing seat; 212. Moving ball bearing; 213. Return spring; 214. Conical seat; 215. Rubber ring one; 3. Piston skirt body; 4. Electric telescopic rod; 5. Vacuum cleaning mechanism; 6. Transmission mechanism; 601. 602. Transmission wheel 1; 603. Transmission belt 2; 604. I-shaped base; 605. Rubber ring 2; 606. Linkage turntable; 607. Drive motor; 608. Active turntable; 609. Linkage bar; 7. Grinding mechanism; 701. Grinding roller; 702. Bevel gear 1; 703. Grinding motor; 704. Bevel gear 2; 705. Grinding belt; 706. Support top roller; 8. Pressing and cleaning mechanism; 801. Moving base; 802. Mounting slide rod 1; 803. End plate; 804. Pressing spring 1; 805. Pressing roller; 806. Mounting groove; 807. Mounting slide rod 2; 808. Moving slider; 809. Pressing spring 2; 810. Cleaning roller. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figures 1-11 The present invention provides a technical solution:

[0035] An edge grinding device for piston skirt casting includes a base 1, which includes a mounting frame 101. A mounting top frame 102 is fixedly mounted on one side of the top of the mounting frame 101. T-shaped slide bars 103 are fixedly connected to the bottom ends of the mounting top frame 102 on both sides of the mounting frame 101. A movable clamping mechanism 2 is slidably mounted through the surfaces of the two T-shaped slide bars 103 on the top of the mounting frame 101. Three piston skirt bodies 3 are equidistantly placed on the top of the movable clamping mechanism 2. Electric telescopic rods 4 are fixedly mounted on both sides of the mounting top frame 102, and the telescopic ends of the electric telescopic rods 4 are fixedly connected to rectangular blocks. The movable clamping mechanism 2 has two ends; a trapezoidal plate 104 is fixedly connected to the side of the mounting base 101 away from the mounting top frame 102. Three push grooves 105 are equidistantly provided on the surface of the trapezoidal plate 104. A vacuum dust collection mechanism 5 is fixedly installed at the bottom of the mounting top frame 102 near the trapezoidal plate 104. A transmission mechanism 6 is provided between the bottom of the mounting top frame 102 and the trapezoidal plate 104. A grinding mechanism 7 is provided inside the mounting top frame 102. A rectangular through groove 106 is provided through the center of the top and bottom of the mounting top frame 102. A pressing cleaning mechanism 8 is fixedly installed at the position corresponding to the rectangular through groove 106 of the mounting top frame 102.

[0036] During operation, the mounting base 101 serves as the bottom support structure. The mounting top 102, fixed to one side of its top, provides mounting points for grinding, clamping, and cleaning mechanisms. The T-shaped sliding strips 103 on both sides of the mounting base 101 provide guiding constraints for the sliding of the moving clamping mechanism 2. Before grinding the piston skirt body 3, the three piston skirt bodies 3 are placed equidistantly at their corresponding positions on the moving clamping mechanism 2. At this time, the electric telescopic rod 4 is in an extended state. Controlling the electric telescopic rod 4 to retract pulls the moving clamping mechanism 2 to slide close to the grinding mechanism 7 on the top of the trapezoidal plate 104. The piston skirt body 3 is pressed tightly against the grinding mechanism 7. Under the spring-loaded pressing action of the pressing and cleaning mechanism 8, the grinding mechanism 7 is always kept in a straight and taut state on the surface of the piston skirt body 3. The transmission mechanism 6 transmits the rotation to the piston skirt body 3, so that the piston skirt body 3 rotates at a low speed on the surface of the grinding mechanism 7, thereby polishing the surface of the piston skirt body 3. The debris and residue that the grinding mechanism 7 has polished off the surface of the piston skirt body 3 are promptly sucked away by the vacuum dust collection mechanism 5 to reduce dust. At the same time, the pressing and cleaning mechanism 8 cleans the debris left on the surface of the grinding mechanism 7 due to the polishing.

[0037] The push chute 105 consists of two horizontal chute sections and one inclined chute section. The two horizontal chute sections are not at the same horizontal height, and the two horizontal chute sections are connected to the two ends of the inclined chute respectively.

[0038] During operation, as the movable clamping mechanism 2 slides toward the grinding mechanism 7, the movable ball 212 at the bottom of the T-shaped turntable 202 rolls along the trajectory of the push slide 105. Initially, the movable ball 212 is in the low horizontal section of the push slide 105. As the movable clamping mechanism 2 slides, the movable ball 212 rolls upward along the inclined groove and eventually enters the high horizontal section. The push slide 105 provides an upward thrust for the movable ball 212 through the structural design of the height difference.

[0039] The movable clamping mechanism 2 includes a movable platform 201, with both ends of the movable platform 201 slidably connected to the surface of a T-shaped slide bar 103. Three T-shaped turntables 202 are equidistantly mounted on the top of the movable platform 201 via bearings, and the T-shaped turntables 202 correspond to the positions of the push slide grooves 105. A fixed post 203 is fixedly mounted at the center of the top of each T-shaped turntable 202. A top plate 204 is fixedly mounted on the top of the fixed post 203. A sliding ring 205 is slidably mounted through the bottom surface of the fixed post 203. Multiple rotating seats 206 are fixedly mounted at equal angles on the outer surfaces of the top plate 204 and the sliding ring 205, with each pair of rotating seats 206 on the outer surfaces of the top plate 204 and the sliding ring 205 corresponding to each other. Top bars 207 are rotatably mounted inside each rotating seat 206 via pins. The ends of two top bars 207 furthest from the rotating seats 206 are connected by pins. A clamping top block 208 is rotatably installed and is pressed against the inner wall of the piston skirt body 3; a push plate 209 is slidably installed through the bottom end of the fixed column 203, and the push plate 209 is fixedly connected to the inner wall of the sliding ring 205 through the surface of the bottom end of the fixed column 203 via a protrusion; a push rod 210 is fixedly installed at the bottom of the push plate 209, and the bottom end of the push rod 210 extends through the fixed column 203 and the T-shaped turntable 202 to the bottom end of the T-shaped turntable 202; a ball seat 211 is fixedly installed at one end of the push rod 210 at the bottom of the T-shaped turntable 202; a movable ball 212 is rolledly installed at the bottom of the ball seat 211, and the movable ball 212 is rolledly connected to the inside of the push groove 105; a return spring 213 is sleeved on the surface of the bottom end of the push rod 210 between the T-shaped turntable 202 and the ball seat 211;

[0040] During operation, when the moving ball bearings 212 at the bottom of the T-shaped turntable 202 roll upward along the pusher groove 105 to push the pusher rod 210, the pusher slide plate 209 inside the fixed column 203 moves upward. The pusher slide plate 209, through the protrusion, synchronously drives the sliding ring 205 on the outer side of the fixed column 203 to slide upward along the column body, reducing the distance between the rotating seat 206 on the outer surface of the sliding ring 205 and the rotating seat 206 on the outer surface of the top plate 204. This pushes the top bar 207 between the two sets of rotating seats 206 to unfold outward by the pin shaft, thereby pushing the clamping top block 208 to move outward and fit tightly against the inner wall of the piston skirt body 3, completing the automatic centering of the piston skirt body 3. Clamping, at this time the return spring 213 is compressed by the ball seat 211. After the piston skirt body 3 is polished, the control moving plate 201 drives the T-shaped turntable 202 and the piston skirt body 3 away from the polishing mechanism 7. The moving ball 212 at the bottom of the push rod 210 is pressed down and pressed against the inside of the push slide groove 105 under the rebound action of the return spring 213. While controlling the piston skirt body 3 to gradually move away from the polishing mechanism 7, the push rod 210 presses down and pulls the sliding ring 205 down, so that the top bar 207 retracts and pulls the clamping top block 208 away from the inner wall of the piston skirt body 3, thereby releasing the piston skirt body 3 and removing the piston skirt body 3 from the top of the T-shaped turntable 202.

[0041] A conical seat 214 is fixedly installed at the bottom edge of the T-shaped turntable 202, and a rubber ring 215 is fitted onto the outer surface of the conical seat 214. The transmission mechanism 6 includes a transmission wheel 601, on which two transmission belts 602 are symmetrically fitted. Transmission wheels 603 are respectively installed on the inner walls of the two transmission belts 602 away from the transmission wheel 601. The bottom ends of the transmission wheels 601 and 603 are rotatably connected to one side of the trapezoidal plate 104 through bearings. I-shaped seats 604 are fixedly connected to the top ends of the transmission wheels 601 and 603 respectively. The top of the seat 604 is rotatably connected to the mounting bracket 102 via a bearing. A rubber ring 605 is fitted onto the surface of the I-shaped seat 604, and the rubber ring 605 is in close contact with the rubber ring 215. The bottom end of the transmission wheel 601 passes through the trapezoidal plate 104 and is fixedly connected to the linkage turntable 606. The bottom of the mounting bracket 102 is fixedly installed at the center position on one side of the pressure cleaning mechanism 8. The output end of the drive motor 607 is fixedly connected to the active turntable 608, and the bottom edges of the linkage turntable 606 and the active turntable 608 are rotatably connected by a linkage bar 609 through a protrusion.

[0042] During operation, once the rubber ring 215 and the rubber ring 605 are tightly fitted together, the drive motor 607 starts, and its output drives the active turntable 608 to rotate in a circular motion. The protrusions on the bottom edge of the active turntable 608 pull the linkage bar 609 to oscillate back and forth, thereby driving the linkage turntable 606 to rotate synchronously. The transmission wheel 601, which is fixed to the linkage turntable 606, rotates accordingly. The transmission wheel 601 transmits power to the transmission wheel 603 through two transmission belts 602 on its surface, so that the transmission wheel 603 and the transmission wheel 601 rotate synchronously. The I-shaped seat 604 at the top of both rotates together. The rubber ring 605 and the rubber ring 215 on the surface of the I-shaped seat 604 generate friction. Relying on the friction, the T-shaped turntable 202 rotates slowly around its own axis, ultimately achieving synchronous low-speed rotation of the piston skirt body 3 after clamping and fixing it against the grinding belt 705.

[0043] The grinding mechanism 7 includes two grinding rollers 701. The two grinding rollers 701 are rotatably connected to the two ends of the mounting bracket 102 near the T-shaped slide bar 103 via bearings. The top of one grinding roller 701 passes through the mounting bracket 102 and is fixedly connected to a bevel gear 702. A grinding motor 703 is fixedly connected to the top of the mounting bracket 102 near the bevel gear 702. The output end of the grinding motor 703 is fixedly connected to a bevel gear 704. The bevel gear 704 and the bevel gear 702 mesh with each other. A grinding belt 705 is sleeved on the surface of the two grinding rollers 701. Multiple support rollers 706 are rotatably mounted inside the mounting bracket 102 between the two grinding rollers 701 via bearings. The two support rollers 706 form a group, and each group of support rollers 706 corresponds to the position of the piston skirt body 3.

[0044] During operation, the grinding motor 703 starts, and its output end drives the second bevel gear 704 to rotate. The second bevel gear 704 meshes with the first bevel gear 702, transmitting power to the grinding rollers 701, causing one of the grinding rollers 701 to rotate. Through the grinding belt 705 fitted on the surface, the other grinding roller 701 rotates synchronously, realizing the high-speed cyclic rotation of the grinding belt 705. The support roller 706 inside the mounting frame 102 provides inner support for the grinding belt 705. Each set of support rollers 706 corresponds to a grinding position of a piston skirt body 3. When the piston skirt body 3 rotates at low speed and is pressed against the outer surface of the grinding belt 705, the high-speed translation of the grinding belt 705 and the low-speed rotation of the piston skirt body 3 form relative friction, grinding the surface and edges of the piston skirt body 3. The support roller 706 effectively prevents the grinding belt 705 from being squeezed and dented, ensuring the fit of the grinding surface.

[0045] The clamping cleaning mechanism 8 includes two movable seats 801. Each movable seat 801 has a sliding mounting rod 802 that is slidably installed on both sides. The two mounting rods 802 form a group. Each group of mounting rods 802 has an end plate 803 fixedly installed at both ends. The two groups of end plates 803 are fixedly connected to the two sides of the rectangular through groove 106 at the top and bottom of the mounting top frame 102. A clamping spring 804 is sleeved on the surface of each mounting rod 802 on one side of the movable seat 801. A clamping roller 805 is rotatably installed between the two movable seats 801 through a bearing, and the clamping roller 805 is in close contact with the inner wall of the grinding belt 705.

[0046] During operation, when the piston skirt body 3 is pressed against the outer surface of the grinding belt 705, the grinding belt 705 is subjected to compressive force, resulting in local deformation and relaxation inward. At this time, the compression spring 804 on the surface of the mounting slide rod 802 generates elastic rebound, pushing the moving seat 801 to slide along the mounting slide rod 802 towards the grinding belt 705. The compression roller 805 between the two moving seats 801 moves synchronously with the moving seats 801, closely adhering to the inner ring of the grinding belt 705. Relying on the continuous elastic force of the compression spring 804, the pushing force is adaptively adjusted according to the degree of deformation of the grinding belt 705, timely offsetting the relaxation, so that the grinding belt 705 always remains straight and taut.

[0047] The movable seat 801 has mounting grooves 806 extending through both sides between the mounting slide rod 802 and the pressure roller 805. The mounting slide rod 807 is fixedly installed on the inner wall of the mounting groove 806, and a movable slider 808 is slidably installed through the surface of the mounting slide rod 807. A pressure spring 809 is sleeved on the surface of the mounting slide rod 807 on one side of the movable slider 808. A cleaning roller 810 is rotatably installed between the two movable sliders 808 through a rotating shaft, and the cleaning roller 810 is in close contact with the outer surface of the grinding belt 705.

[0048] During operation, as the grinding belt 705 rotates at high speed to grind the surface of the piston skirt body 3, metal debris adheres to the outer surface of the grinding belt 705. The compression spring 809 inside the mounting groove 806 generates elastic rebound, pushing the movable slider 808 to slide along the mounting slide rod 807 towards the grinding belt 705. The cleaning roller 810 between the two movable sliders 808 moves synchronously with the movable sliders 808, closely adhering to the outer surface of the grinding belt 705. When the grinding belt 705 rotates at high speed, the cleaning roller 810 is passively rotated by friction. Through relative friction with the grinding belt 705, the debris and dust adhering to the surface of the grinding belt 705 are thoroughly scraped away.

[0049] Working principle of this invention:

[0050] When the electric telescopic rod 4 is in its fully extended state, its telescopic end pushes the moving table 201 of the moving clamping mechanism 2 to slide along the T-shaped slide bar 103 to the initial loading position away from the grinding mechanism 7. The three piston skirt bodies 3 to be ground are respectively placed on the outside of the clamping top blocks 208 on the top of the three T-shaped turntables 202. After loading, the electric telescopic rod 4 is activated to retract. The telescopic end pulls the moving table 201 horizontally along the T-shaped slide bar 103 towards the grinding mechanism 7 via the rectangular block. The three T-shaped turntables 202 on the top of the moving table 201 move synchronously, causing the piston skirt bodies 3 to move closer to the grinding belt 705. During the movement, the moving balls 212 at the bottom of the T-shaped turntable 202 begin to roll along the trajectory of the push groove 105, entering the inclined groove from the low horizontal section. When the inclined groove of 105 rolls upward, the ball seat 211 pushes the push rod 210 upward, causing the push slide plate 209 inside the fixed column 203 to move up along the column. The push slide plate 209 drives the sliding ring 205 on the outside of the fixed column 203 to slide upward along the column through the protrusion, so that the distance between the rotating seat 206 on the outer circle of the sliding ring 205 and the rotating seat 206 on the outer circle of the top plate 204 gradually decreases. The top bar 207 between the two sets of rotating seats 206 unfolds outward, thereby pushing the clamping top block 208 to move horizontally outward. When the moving ball 212 rolls to the high horizontal section of the push groove 105, the clamping top block 208 fits tightly against the inner wall of the piston skirt body 3, completing the automatic centering and clamping fixation of the piston skirt body 3. At the same time, the push rod 210 moves upward, causing the ball seat 211 to compress the return spring 213.

[0051] The electric telescopic rod 4 continues to retract, pulling the piston skirt body 3, which has been clamped, closer to the grinding mechanism 7 until the outer surface of the piston skirt body 3 initially contacts the grinding belt 705. At this time, the rubber ring 215 on the outer side of the tapered seat 214 at the bottom edge of the T-shaped turntable 202 and the rubber ring 605 on the outer side of the I-shaped seat 604 in the transmission mechanism 6 are tightly fitted. At the same time, the moving platform 201 stops sliding, and the electric telescopic rod 4 maintains its current telescopic state. Then, the drive motor 607 is started to control the I-shaped seat 604 to rotate the rubber ring 605 against the surface of the rubber ring 215. When the I-shaped seat 604 rotates, a stable frictional force is generated between the rubber ring 605 and the rubber ring 215 on its surface. Relying on the frictional force, the T-shaped turntable 202 rotates at a low and uniform speed around its own axis, so that the piston skirt body 3, which is clamped and fixed, rotates synchronously at a low speed with the T-shaped turntable 202.

[0052] While the transmission mechanism 6 drives the piston skirt body 3 to rotate at a low speed, the grinding motor 703 and the vacuum suction mechanism 5 are started, and the grinding operation officially begins. The grinding motor 703 controls the grinding belt 705 to circulate and move at high speed inside the mounting bracket 102. When the outer surface of the piston skirt body 3, which rotates at a low speed, comes into close contact with the grinding belt 705, strong relative friction is formed between the two, which grinds the outer surface and edges of the piston skirt body 3, achieving comprehensive grinding without dead angles. Some of the metal chips and dust generated during the grinding process are sucked up by the vacuum suction mechanism that starts simultaneously. The dust removal mechanism 5 promptly removes dust from the workshop, while the remaining dust temporarily adheres to the outer surface of the grinding belt 705. During the grinding process, the rotational pressure of the piston skirt body 3 causes the grinding belt 705 to deform and loosen inward. The pressure spring 804 on the surface of the mounting slide rod 802 rebounds elastically, pushing the moving seat 801 to slide along the mounting slide rod 802 toward the grinding belt 705. This causes the pressure roller 805 between the two moving seats 801 to press tightly against the deformed position of the inner ring of the grinding belt 705, keeping the grinding belt 705 taut and straight at all times.

[0053] While the grinding belt 705 moves at high speed, the metal shavings attached to its outer surface will move with the grinding belt 705 and cause the cleaning roller 810 to be pressed against the surface. At this time, the clamping spring 809 inside the mounting groove 806 will rebound elastically, pushing the moving slider 808 to slide along the mounting slide rod 807 towards the grinding belt 705, so that the cleaning roller 810 is pressed against the outer surface of the grinding belt 705. When the grinding belt 705 rotates at high speed, the cleaning roller 810 is passively rotated at a constant speed under the action of friction. Through the relative friction with the grinding belt 705, the shavings and dust attached to its surface are completely scraped off, preventing the shavings from accumulating on the surface of the grinding belt 705, preventing the shavings from causing secondary scratches on the grinding surface of the piston skirt body 3, and ensuring the smoothness of the grinding surface.

[0054] After the piston skirt body 3 is polished, the electric telescopic rod 4 is extended to push the moving table 201 to slide along the T-shaped slide bar 103 towards the initial feeding position, causing the polished piston skirt body 3 to move away from the polishing mechanism 7. At this time, the moving ball bearings 212 at the bottom of the T-shaped turntable 202 roll along the high horizontal section of the push slide groove 105 towards the inclined groove and the low horizontal section. The return spring 213 releases its elastic potential energy and pushes the ball bearing seat 211 downward, causing the push rod 210 and the push slide plate 209 to move downward. The movement of the sliding ring 205 pulls it down along the fixed column 203. The downward movement of the sliding ring 205 increases the distance between the rotating seats 206. The top bar 207 is pulled inward by the pin shaft, causing the clamping top block 208 to move inward and disengage from the inner wall of the piston skirt body 3, thus completing the automatic release. When the moving table 201 returns to the initial loading position, the electric telescopic rod 4 stops working, and the operator can directly remove the polished piston skirt body 3 from the top of the T-shaped turntable 202 to complete the unloading.

Claims

1. An edge grinding device for piston skirt casting, comprising a base (1), characterized in that: The base (1) includes a mounting base (101), a mounting top frame (102) is fixedly installed on one side of the top of the mounting base (101), T-shaped slide bars (103) are fixedly connected to the bottom of the two ends of the mounting top frame (102) on both sides of the mounting base (101), and a movable clamping mechanism (2) is slidably installed on the top of the mounting base (101) through the surfaces of the two T-shaped slide bars (103). Three piston skirt bodies (3) are equidistantly placed on the top of the movable clamping mechanism (2), and electric telescopic rods (4) are fixedly installed on both sides of the mounting top frame (102). The telescopic ends of the electric telescopic rods (4) are fixedly connected to the two ends of the movable clamping mechanism (2) through rectangular blocks. A trapezoidal plate (104) is fixedly connected to the side of the mounting base (101) away from the mounting top frame (102). Three push grooves (105) are equidistantly provided on the surface of the trapezoidal plate (104). A vacuum dust collection mechanism (5) is fixedly installed at the bottom of the mounting top frame (102) near the trapezoidal plate (104). A transmission mechanism (6) is provided between the bottom of the mounting top frame (102) and the trapezoidal plate (104). A grinding mechanism (7) is provided inside the mounting top frame (102). A rectangular through groove (106) is provided through the center of the top and bottom of the mounting top frame (102). A pressing cleaning mechanism (8) is fixedly installed at the position corresponding to the rectangular through groove (106) of the mounting top frame (102).

2. The edge grinding device for piston skirt casting according to claim 1, characterized in that: The push chute (105) consists of two horizontal chute sections and one inclined chute section. The two horizontal chute sections are not at the same horizontal height, and the two horizontal chute sections are respectively connected to the two ends of the inclined chute.

3. The edge grinding device for piston skirt casting according to claim 1, characterized in that: The movable clamping mechanism (2) includes a movable platform (201), and both ends of the movable platform (201) are slidably connected to the surface of the T-shaped slide bar (103). Three T-shaped turntables (202) are equidistantly mounted on the top of the movable platform (201) via bearings, and the positions of the T-shaped turntables (202) correspond to the positions of the push slide groove (105). A fixed column (203) is fixedly installed at the center of the top of the T-shaped turntable (202), and a top plate (204) is fixedly installed at the top of the fixed column (203). The surface of the bottom end of the fixed column (203) A sliding ring (205) is slidably installed through the top plate (204) and the outer circular surface of the sliding ring (205) are respectively fixedly installed with multiple rotating seats (206) at equal angles, and the rotating seats (206) on the outer circular surface of the top plate (204) and the sliding ring (205) are in pairs corresponding positions. A top bar (207) is rotatably installed inside the rotating seat (206) through a pin shaft. A clamping top block (208) is rotatably installed at one end of the two top bars (207) away from the rotating seat (206) through a pin shaft, and the clamping top block (208) is close to the inner wall of the piston skirt body (3).

4. The edge grinding device for piston skirt casting according to claim 3, characterized in that: A push plate (209) is slidably mounted inside the bottom end of the fixed column (203), and the push plate (209) is fixedly connected to the inner wall of the sliding ring (205) through a protrusion penetrating the surface of the bottom end of the fixed column (203). A push rod (210) is fixedly mounted at the bottom of the push plate (209), and the bottom end of the push rod (210) extends through the fixed column (203) and the T-shaped turntable (202) to the bottom end of the T-shaped turntable (202). The push rod (210) is located at the bottom of the T-shaped turntable (202). A ball bearing seat (211) is fixedly installed at the end. A movable ball bearing (212) is rolled and installed at the bottom of the ball bearing seat (211), and the movable ball bearing (212) is rolled and connected to the inside of the push groove (105). A return spring (213) is sleeved on the surface of the bottom end of the push rod (210) between the T-shaped turntable (202) and the ball bearing seat (211). A conical seat (214) is fixedly installed at the edge of the bottom end of the T-shaped turntable (202), and a rubber ring (215) is sleeved on the outer surface of the conical seat (214).

5. The edge grinding device for piston skirt casting according to claim 1, characterized in that: The transmission mechanism (6) includes a first transmission wheel (601), on which two transmission belts (602) are symmetrically sleeved. A second transmission wheel (603) is respectively mounted on the inner wall of the two transmission belts (602) away from the first transmission wheel (601). The bottom ends of the first transmission wheel (601) and the second transmission wheel (603) are rotatably connected to one side of the trapezoidal plate (104) via bearings. I-shaped seats (604) are fixedly connected to the top ends of the first transmission wheel (601) and the second transmission wheel (603), respectively. The top of the I-shaped seats (604) is rotatably connected to the mounting bracket (102) via bearings. A rubber ring two (605) is fitted onto the surface of the I-shaped base (604), and the rubber ring two (605) is in close contact with the rubber ring one (215). The bottom end of the transmission wheel one (601) passes through the trapezoidal plate (104) and is fixedly connected to the linkage turntable (606). The bottom of the mounting top frame (102) is fixedly installed with a drive motor (607) at the center position on one side of the pressure cleaning mechanism (8). The output end of the drive motor (607) is fixedly connected to the active turntable (608), and the bottom edges of the linkage turntable (606) and the active turntable (608) are rotatably connected by a protrusion with a linkage bar (609).

6. The edge grinding device for piston skirt casting according to claim 1, characterized in that: The grinding mechanism (7) includes two grinding rollers (701). The two grinding rollers (701) are rotatably connected to both ends of the mounting bracket (102) near the T-shaped slide bar (103) via bearings. One grinding roller (701) has a bevel gear (702) fixedly connected to its top end through the mounting bracket (102). A grinding motor (703) is fixedly connected to the top of the mounting bracket (102) near the bevel gear (702). The output end of the motor (703) is fixedly connected to a bevel gear two (704), bevel gear two (704) and bevel gear one (702) mesh with each other, and a grinding belt (705) is sleeved on the surface of the two grinding rollers (701). Multiple support rollers (706) are rotatably installed in the mounting bracket (102) between the two grinding rollers (701) through bearings, and two support rollers (706) form a group. Each group of support rollers (706) corresponds to the position of the piston skirt body (3).

7. The edge grinding device for piston skirt casting according to claim 6, characterized in that: The clamping cleaning mechanism (8) includes a movable seat (801), and there are two movable seats (801). Each movable seat (801) has a sliding mounting rod (802) that is slidably installed on both sides. The two mounting rods (802) form a group. Each group of mounting rods (802) has an end plate (803) fixedly installed at both ends. The two groups of end plates (803) are fixedly connected to the top and bottom rectangular through grooves (106) of the mounting top frame (102). Each mounting rod (802) has a clamping spring (804) sleeved on the surface of one side of the movable seat (801). A clamping roller (805) is rotatably installed between the two movable seats (801) through a bearing, and the clamping roller (805) is close to the inner wall of the grinding belt (705).

8. The edge grinding device for piston skirt casting according to claim 7, characterized in that: The movable seat (801) has mounting grooves (806) on both sides between the mounting slide rod (802) and the pressure roller (805). The mounting slide rod (807) is fixedly installed on the inner wall of the mounting groove (806), and a movable slider (808) is slidably installed on the surface of the mounting slide rod (807). A pressure spring (809) is sleeved on the surface of the mounting slide rod (807) on one side of the movable slider (808). A cleaning roller (810) is rotatably installed between the two movable sliders (808) through a rotating shaft, and the cleaning roller (810) is in close contact with the outer surface of the grinding belt (705).

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