Piston pin clamping device for automatic chamfering of piston pin

Abstract

The application provides a piston pin clamping device for automatic chamfering of a piston pin, and relates to the technical field of clamping devices for grinding processing.The device comprises a horizontal support positioning shaft welded on a square positioning sleeve on the upper side, and a shaft ring slidingly sleeved on the horizontal support positioning shaft;the upper half of a second vertical support plate is slidingly sleeved with a convex driving plate through spring pushing, and a vertical support force transmission shaft is welded on the top end of the convex driving plate;the first connecting rod is rotatably installed between the convex driving plate and the shaft ring;the top end of the six-edge vertical support rod is welded with an L-shaped stop rod, the vertical support force transmission shaft is in contact with the L-shaped stop rod when the U-shaped clamping frame slides upward, the power transmission of the vertical support force transmission shaft is used together with the spring on the vertical support sliding rod, the vertical support sliding rod indirectly uses the driving force of the upward and downward sliding of the U-shaped clamping frame to drive the upward and downward sliding of the piston pin, and the trouble of manually opening and closing the vertical support sliding rod every time the piston pin is disassembled and replaced is avoided.

Description

Technical Field

[0001] This invention relates to the technical field of clamping devices for grinding, and more particularly to a piston pin clamping device for automatic chamfering of piston pins. Background Technology

[0002] Chamfering piston pins improves their machinability, assembly performance, usability, and reliability. Piston pins are typically chamfered by grinding. A clamping device is required for positioning during the grinding and chamfering process.

[0003] Existing clamping devices are often designed as separate entities from the chamfering equipment, without being integrated with the chamfering equipment for overall optimization. This results in the clamping devices not being well-suited for use with the chamfering equipment or for the processing conditions on it. Consequently, the components on the clamping device that clamp, position, or limit the piston pin cannot be automatically switched on or off using any form of torque on the chamfering equipment. This means that every time the piston pin 8 is disassembled or replaced on the clamping device, the positioning or limiting components must be manually switched on or off, making operation cumbersome and inconvenient, and hindering the efficiency of using the clamping device for chamfering the piston pin. Summary of the Invention

[0004] In view of this, the present invention provides a piston pin clamping device for automatic chamfering of piston pins, so as to solve the problem that each time the piston pin 8 is disassembled and replaced on the clamping device, it is necessary to manually tighten or loosen the positioning or limiting components, which is cumbersome and inconvenient to operate.

[0005] The technical solution proposed in this invention is: a piston pin clamping device for automatic chamfering of piston pins, specifically including: an I-shaped base, a hexagonal vertical support rod welded to the middle position of the horizontal support rod on the I-shaped base, and a U-shaped clamping frame slidably installed on the upper half of the hexagonal vertical support rod by spring pushing. The U-shaped clamping frame is characterized by having two symmetrically welded positioning rings at the bottom ends of the first and second vertical support plates, which are used for fitting and installing piston pins; two square positioning sleeves are welded at intervals on the outer side of the second vertical support plate, and vertical support slide rods are slidably installed on the two square positioning sleeves by spring pushing; an L-shaped limiting rod is welded to the outer side of the bottom part of the first vertical support plate, with the first end of the piston pin abutting against the L-shaped limiting rod and the tail end abutting against the vertical support slide rod; and two symmetrically welded positioning rings are located on the middle section of the vertical support slide rod. A limiting plate is provided; a horizontal support positioning shaft is welded to the square positioning sleeve on the upper side, and a collar is slidably fitted on the horizontal support positioning shaft. A second connecting rod is rotatably connected between the collar and the outer limiting plate; a convex drive plate is slidably fitted on the upper half of the second vertical support plate by a spring push, and a vertical support force transmission shaft is welded to the middle position of the top of the convex drive plate; a first connecting rod is rotatably installed between the convex drive plate and the collar; an L-shaped stop bar is welded to the top of the hexagonal vertical support rod, and the vertical support force transmission shaft abuts against the L-shaped stop bar when it slides upward with the U-shaped clamping frame.

[0006] Furthermore, A U-shaped unloading frame is installed on the first vertical support plate. A T-shaped sliding rod is welded to the inner side of the top of the U-shaped unloading frame. The T-shaped sliding rod slides through the bottom part of the first vertical support plate by being pushed by a spring. A T-shaped insert rod is slidably installed on the outer side of the first vertical support plate near the U-shaped unloading frame by means of a spring push. The bottom end of the T-shaped insert rod is inserted and connected to the T-shaped sliding rod, and a longitudinal drive groove is provided on the longitudinal support section of the T-shaped insert rod.

[0007] Furthermore, An L-shaped drive rod is rotatably mounted on the outer side of the first vertical support plate near the T-shaped insert. A gear is fitted on the first end of the rod segment of the L-shaped drive rod that is perpendicular to the first vertical support plate. The gear is connected to the rod segment of the L-shaped drive rod that is perpendicular to the first vertical support plate through an internal ratchet mechanism. The first end of the rod segment parallel to the first vertical support plate on the L-shaped drive rod is welded with a pivot shaft, which is inserted into the longitudinal drive groove.

[0008] Furthermore, The inner limiting plate is welded with a continuous vertical bend drive rod. A row of toothed plates is provided on the vertical rod section at the beginning of the drive rod. When the row of toothed plates slides upward with the vertical support slide rod, it meshes with the gear.

[0009] Furthermore, The top of the U-shaped clamping frame is welded with a T-shaped handle and a slip ring. The T-shaped handle and the slip ring are arranged opposite to each other, and the slip ring slides with the upper half of the hexagonal vertical support rod by spring push.

[0010] Furthermore, A mounting frame is welded to the top of the I-beam base. The mounting frame is composed of a horizontal support base and two inclined mounting rods symmetrically welded to both ends of the horizontal support base. A grinding wheel is rotatably mounted at the front end of the inclined mounting rod, and a grinding motor is rotatably mounted at the rear end. The grinding motor and the grinding wheel are connected by a synchronous belt drive. A vertical mounting rod is welded to the middle section of the cross brace base rod. A rubber guide wheel is rotatably mounted on the top of the vertical mounting rod. A guide motor is threadedly fastened to the bottom part. The guide motor and the rubber guide wheel are connected by a synchronous belt drive.

[0011] Furthermore, When the piston pin is chamfered, the U-shaped clamping frame slides down, driving the two ends of the piston pin to abut against the two grinding wheels, and the middle part to abut against the rubber guide wheel.

[0012] Furthermore, An inclined unloading pipe is provided in the adjacent space on one side of the mounting frame. A support tray facing the hexagonal vertical support rod is welded to the top opening of the inclined unloading pipe. When the U-shaped clamping frame slides upward and comes into contact with the L-shaped stop bar, the positioning ring is aligned with the top opening of the inclined unloading pipe at the same height.

[0013] Furthermore, The first end of the convex drive plate has a rectangular sliding groove. When the vertical support slide rod and the convex drive plate slide close to each other, the upper half of the vertical support slide rod slides through the rectangular sliding groove.

[0014] The piston pin clamping device for automatic chamfering of piston pins provided by the present invention has the following beneficial effects: 1. By transmitting power through the vertical support shaft and using the spring on the vertical support slide rod, the vertical support slide rod can indirectly utilize the driving force of the U-shaped clamping frame sliding up and down to automatically tighten or loosen the piston pin. Compared with the existing technology, it eliminates the trouble of manually tightening or loosening the vertical support slide rod every time the piston pin is disassembled or replaced. The operation is more convenient and time-saving, which helps to improve the efficiency of chamfering the piston pin.

[0015] 2. When the U-shaped clamping frame slides upward to reset and pushes the vertical support slide rod upward, a row of gears follows the vertical support slide rod and the drive rod upward to engage with the gears and drive the L-shaped drive rod to swing upward. Through the power transmission of the upper shaft of the L-shaped drive rod, when the L-shaped drive rod swings upward, it can push the T-shaped insert rod upward to slide and separate from the positioning hole, releasing the T-shaped slide rod. When the T-shaped slide rod is released, the spring on it rebounds and pushes the T-shaped slide rod and the U-shaped clamping frame to slide to the right at high speed to reset (refer to Figures 1, 2, and 3), and impacts the piston pin after machining to automatically slide out from the two positioning rings for unloading. This eliminates the trouble of manually removing and unloading the piston pin after each chamfering operation, which helps to further improve the chamfering efficiency of the piston pin. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0017] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0018] In the attached diagram, the side with the T-shaped handlebar is designated as the front side, and the side with the L-shaped limit bar is designated as the left side.

[0019] Figure 1 A schematic diagram of the overall front structure of the present invention is shown; Figure 2 A schematic diagram of the overall rear structure of the present invention is shown; Figure 3 A schematic diagram of the front structure of the U-shaped sliding frame in the sliding state of the present invention is shown; Figure 4 A schematic diagram of the rear structure of the U-shaped sliding frame in the sliding state of the present invention is shown; Figure 5 A schematic diagram of the left side structure of the U-shaped sliding frame of the present invention is shown; Figure 6 A schematic diagram of the right side structure of the U-shaped sliding frame of the present invention is shown; Figure 7 A schematic diagram showing the disassembled state of the vertical support slide bar of the present invention is shown; Figure 8 The present invention is shown Figure 5 Enlarged structural diagram of section A; Figure 9 The present invention is shown Figure 3 Enlarged structural diagram of section B.

[0020] List of reference numerals in the attached diagram: 1. I-beam base; 101. Hexagonal vertical support rod; 102. L-shaped stop bar; 2. Mounting bracket; 201. Grinding wheel; 202. Vertical mounting rod; 203. Rubber guide wheel; 3. Grinding motor; 4. Conveyor motor; 5. Inclined unloading pipe; 501. Pallet support; 6. U-shaped clamping frame; 601. First vertical support plate; 6011. L-shaped limiting rod; 602. Second vertical support plate; 603. T-shaped handle; 604. Slip ring; 605. U-shaped unloading frame; 6051. T-shaped sliding rod; 606. Horizontal support positioning shaft; 6061. Shaft collar; 607. Convex drive plate; 6071. Vertical support force transmission shaft; 6072. First connecting rod; 608. T-shaped insert rod; 609. L-shaped drive rod; 6091. Gear; 610. Positioning ring; 7. Vertical support slide bar; 701. Limiting plate; 702. Drive rod; 703. Second connecting rod; 8. Piston pin. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this invention. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. Based on the described embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0022] Please refer to Figures 1 to 9 One embodiment provided by the present invention: This invention proposes a piston pin clamping device for automatic chamfering of piston pins, comprising: an I-beam base 1, a hexagonal vertical support rod 101, an L-shaped stop rod 102, a mounting bracket 2, a grinding wheel 201, a vertical mounting rod 202, a rubber guide wheel 203, a grinding motor 3, a guide motor 4, an inclined unloading pipe 5, a support tray 501, a U-shaped clamping frame 6, a first vertical support plate 601, an L-shaped limiting rod 6011, a second vertical support plate 602, a T-shaped handle 603, a slip ring 604, a U-shaped unloading frame 605, and a T-shaped sliding rod 6. 051, Horizontal support positioning shaft 606, shaft collar 6061, convex drive plate 607, vertical support force transmission shaft 6071, first connecting rod 6072, T-shaped insert rod 608, L-shaped drive rod 609, gear 6091, positioning ring 610, vertical support slide rod 7, limiting plate 701, drive rod 702, second connecting rod 703, piston pin 8, a hexagonal vertical support rod 101 is welded to the middle position of the horizontal support rod on the I-beam base 1, and a U-shaped clamping frame 6 is slidably installed on the upper half of the hexagonal vertical support rod 101 by spring pushing; Two positioning rings 610 are symmetrically welded to the bottom ends of the first vertical support plate 601 and the second vertical support plate 602 on the U-shaped clamping frame 6. The two positioning rings 610 are used to insert and install the piston pin 8. Two square positioning sleeves are welded at intervals on the outer side of the second vertical support plate 602. The vertical support slide rod 7 is slidably installed on the two square positioning sleeves by spring pushing. An L-shaped limiting rod 6011 is welded to the outer side of the bottom part of the first vertical support plate 601. The first end of the piston pin 8 abuts against the L-shaped limiting rod 6011, and the tail end abuts against the vertical support slide rod 7. Two limiting plates 701 are symmetrically welded to the middle section of the vertical support slide rod 7. The upper square positioning sleeve is welded with A horizontal support positioning shaft 606 is provided, and a collar 6061 is slidably fitted on the horizontal support positioning shaft 606. A second connecting rod 703 is rotatably connected between the collar 6061 and the outer limiting plate 701. A convex drive plate 607 is slidably fitted on the upper half of the second vertical support plate 602 by a spring. A vertical support force transmission shaft 6071 is welded to the middle of the top of the convex drive plate 607. A first connecting rod 6072 is rotatably installed between the convex drive plate 607 and the collar 6061. An L-shaped stop bar 102 is welded to the top of the hexagonal vertical support rod 101. When the vertical support force transmission shaft 6071 slides upward with the U-shaped clamping frame 6, it abuts against the L-shaped stop bar 102. A mounting frame 2 is welded to the top of the I-shaped base 1. The mounting frame 2 is composed of a horizontal support base rod and two inclined mounting rods symmetrically welded to both ends of the horizontal support base rod. A grinding wheel 201 is rotatably mounted at the first end of the inclined mounting rod, and a grinding motor 3 is rotatably mounted at the tail end. The grinding motor 3 is connected to the grinding wheel 201 by a synchronous belt drive. The two grinding motors 3 are used to drive the grinding wheel 201 to rotate at high speed. A vertical mounting rod 202 is welded to the middle section of the cross brace base rod. A rubber guide wheel 203 is rotatably mounted on the top of the vertical mounting rod 202. A guide motor 4 is threadedly fastened to the bottom part. The guide motor 4 and the rubber guide wheel 203 are connected by a synchronous belt drive. The guide motor 4 is used to rotate and drive the rubber guide wheel 203. When performing chamfering on the piston pin 8, first insert the unmachined piston pin 8 into the two positioning rings 610, then slide the U-shaped clamping frame 6 downwards, driving the two ends of the piston pin 8 to abut against the two grinding wheels 201, and the middle part to abut against the rubber guide wheel 203 (see reference). Figure 1 and Figure 2When the two ends of the piston pin 8 come into contact with the two high-speed rotating grinding wheels 201, the two grinding wheels 201 can perform grinding and chamfering on the two ends of the piston pin 8. When the middle part of the piston pin 8 comes into contact with the rotating rubber guide wheel 203, the rubber guide wheel 203 can drive the piston pin 8 to rotate in a circle, and perform automatic and complete circumferential chamfering on the two ends of the piston pin 8. After the chamfering is completed, the U-shaped clamping frame 6 slides upward to reset, and the piston pin 8 after processing is separated from the two grinding wheels 201 and the rubber guide wheel 203. The piston pin 8 after processing is disassembled and the unprocessed piston pin 8 is replaced in the two positioning rings 610. The U-shaped clamping frame 6 is automatically slid upward to reset by the spring rebound on the hexagonal vertical support rod 101. When the vertical support rod 7 is in a downward position, it abuts against the tail end of the piston pin 8, positioning the piston pin 8 between itself and the L-shaped limiting rod 6011, thus clamping and securing the piston pin 8 to the two positioning rings 610 (see reference). Figure 5 and Figure 6This prevents the piston pin 8 from falling off the two locating rings 610 during the grinding and chamfering process, thus facilitating a stable and effective chamfering process for the piston pin 8. When the vertical support slide rod 7 slides upward and is pulled away from the tail end of the piston pin 8, the piston pin 8 can be loosened for disassembly and replacement. The vertical support slide rod 7, the second connecting rod 703, and the collar 6061 are connected to form a crank-slider mechanism. Through this mechanism, sliding the collar 6061 to the right can push and drive the vertical support slide rod 7 to compress the spring on it and slide upward. The collar 6061 is also connected to... The first connecting rod 6072 and the convex drive plate 607 are connected to form a crank-slider mechanism. Through this mechanism, the downward sliding convex drive plate 607 can push and drive the collar 6061 to slide to the right, providing an upward driving force for the vertical support slide rod 7. In the initial state, the U-shaped clamping frame 6 is in an upward sliding state and abuts against the L-shaped stop rod 102, the vertical support force transmission shaft 6071 is in a state of abutting against the L-shaped stop rod 102, and the vertical support slide rod 7 is in a state of upward sliding and being withdrawn from the end of the piston pin 8. When When the U-shaped clamping frame 6 is driven to slide downwards, and the vertical support force transmission shaft 6071 disengages from the L-shaped stop bar 102, the spring on the vertical support slide bar 7 loses the pushing and holding force from the L-shaped stop bar 102, and automatically rebounds and pushes the vertical support slide bar 7 downwards to abut against the end of the piston pin 8. When the U-shaped clamping frame 6 is driven to slide upwards to reset, the vertical support force transmission shaft 6071 abuts against the L-shaped stop bar 102. The vertical support force transmission shaft 6071 and the convex drive plate 607 can be pushed downwards by the L-shaped stop bar 102, and drive the control... The vertical support slide rod 7 slides upward and is pulled away from the tail end of the piston pin 8. Then, through the power transmission shaft 6071 of the vertical support, and in conjunction with the spring on the vertical support slide rod 7, the vertical support slide rod 7 can indirectly use the driving force of the U-shaped clamping frame 6 to drive the vertical slide rod 7 to automatically tighten or loosen the piston pin 8. Compared with the existing technology, it eliminates the trouble of manually tightening or loosening the vertical support slide rod 7 every time the piston pin 8 is disassembled or replaced. The operation is more convenient and time-saving, which is conducive to improving the chamfering efficiency of the piston pin 8.

[0023] Preferred, A U-shaped unloading frame 605 is installed on the first vertical support plate 601. A T-shaped sliding rod 6051 is welded to the inner side of the top of the U-shaped unloading frame 605. The T-shaped sliding rod 6051 is slidably engaged with the bottom part of the first vertical support plate 601 by spring pushing. A T-shaped insert rod 608 is slidably installed on the outer side of the first vertical support plate 601 near the U-shaped unloading frame 605 by spring pushing. A positioning hole is opened through the T-shaped sliding rod 6051. The bottom end of the T-shaped insert rod 608 is inserted into the positioning hole. A longitudinal drive groove is opened on the longitudinal support section of the T-shaped insert rod 608.

[0024] Preferred, An L-shaped drive rod 609 is rotatably mounted on the outer side of the first vertical support plate 601 near the T-shaped insert rod 608. A gear 6091 is fitted at the first end of the rod segment of the L-shaped drive rod 609 that is perpendicular to the first vertical support plate 601. The gear 6091 is connected to the rod segment of the L-shaped drive rod 609 that is perpendicular to the first vertical support plate 601 through an internal ratchet mechanism. A dial shaft is welded to the first end of the rod segment of the L-shaped drive rod 609 that is parallel to the first vertical support plate 601. The dial shaft is inserted into the longitudinal drive groove.

[0025] Preferred, A drive rod 702 with a continuous vertical bend is welded on the inner limiting plate 701. A row of toothed plates is provided on the vertical rod section at the head end of the drive rod 702. When the row of toothed plates slides upward with the vertical support slide rod 7, it meshes with the gear 6091.

[0026] In the initial state, the U-shaped clamping frame 6 is in contact with the first vertical support plate 601, and the bottom end of the T-shaped insert rod 608 is in contact with the T-shaped slide rod 6051. When the piston pin 8 is inserted into the two positioning rings 610, it can push and drive the U-shaped clamping frame 6 to slide to the left. During the process of the T-shaped slide rod 6051 sliding to the left with the U-shaped clamping frame 6, when its positioning hole coincides with the T-shaped insert rod 608, the bottom end of the T-shaped slide rod 6051 is inserted into the positioning hole. The T-shaped slide rod 6051 can be inserted and fixed to keep the U-shaped clamping frame 6 in the left sliding position, avoiding the piston pin 8 from being blocked before the vertical support slide rod 7 is inserted and contacts the tail end of the piston pin 8. When the clamping limit is reached, the U-shaped clamping frame 6 slides to the right, pushing the piston pin 8 out from inside the two positioning rings 610. When the U-shaped clamping frame 6 slides upward to reset, it pushes the vertical support slide rod 7 upward. A row of gears follows the vertical support slide rod 7 and the drive rod 702 upward to slide and mesh with the gear 6091, driving the L-shaped drive rod 609 to swing upward. Through the power transmission of the upper shaft of the L-shaped drive rod 609, when the L-shaped drive rod 609 swings upward, it can push the T-shaped insert rod 608 upward to slide and separate from the positioning hole, releasing the T-shaped slide rod 6051. When the T-shaped slide rod 6051 is released, the spring on it rebounds and pushes the T-shaped slide rod 6051 and the U-shaped clamping frame 6 to slide to the right at high speed to reset (refer to...). Figure 3 , Figure 4 and Figure 9 The impact drives the piston pin 8 to automatically slide out from the two positioning rings 610 after processing, which eliminates the trouble of manually removing and unloading the piston pin 8 after each chamfering operation, and helps to further improve the chamfering efficiency of the piston pin 8. It is worth noting that: a row of gears slides upwards following the vertical support slide rod 7 and the drive rod 702, engaging with the gear 6091 for transmission. When the T-shaped insert rod 608 is driven to slide upwards and disengage, it slides away from the gear 6091 (refer to...). Figure 9 This allows the upward pushing force applied by the vertical support slide rod 7 to be released after the T-shaped insert rod 608 is slid out, enabling the T-shaped insert rod 608 to maintain its downward sliding tendency under the rebound push of the compressed spring on it, preparing for the insertion and positioning of the T-shaped slide rod 6051 and the U-shaped clamping frame 6 again with the positioning hole; the internal ratchet mechanism on the gear 6091 has the characteristic of unidirectional transmission of driving force. When a row of gears follows the vertical support slide rod 7 to slide upward and mesh to drive the gear 6091 to rotate counterclockwise, the internal ratchet mechanism connects the gear 6091 with the L-shaped drive rod 609 to ensure that when the vertical support slide rod 7 slides upward, it can drive the T-shaped slide rod 6051 to slide out and release the T-shaped insert rod 6051. The slide bar 6051 and the U-shaped clamping frame 6; when a row of toothed plates slides down and resets with the vertical support slide bar 7, the inner ratchet mechanism disconnects the transmission connection between the gear 6091 and the L-shaped drive rod 609. The geared plates mesh and drive the gear 6091 to rotate clockwise, preventing the gear 6091 from also being connected to the L-shaped drive rod 609 and the T-shaped slide bar 6051 when rotating clockwise. This would prevent the T-shaped slide bar 6051, which is in a stationary state with the positioning hole, from interfering with and restricting the clockwise rotation of the gear 6091, thus hindering the normal downward reset of the row of toothed plates, the drive rod 702, and the vertical support slide bar 7. This helps to ensure the normal and effective implementation of the automatic tensioning function of the vertical support slide bar 7 and the automatic ejection and unloading function of the piston pin 8 by the U-shaped clamping frame 6.

[0027] Preferred, The top of the U-shaped clamping frame 6 is welded with a T-shaped handle 603 and a slip ring 604. The T-shaped handle 603 and the slip ring 604 are arranged opposite to each other, and the slip ring 604 slides with the upper half of the hexagonal vertical support rod 101 by spring push. The U-shaped clamping frame 6 can be driven to slide down via the T-shaped lever 603.

[0028] Preferred, An inclined unloading pipe 5 is provided in the adjacent space on one side of the mounting frame 2. A support tray 501 is welded to the top opening of the inclined unloading pipe 5, which is supported by the hexagonal vertical support rod 101. The piston pin 8, pushed out from the two positioning rings 610 by the U-shaped clamping frame 6, slides into the top opening of the inclined discharge pipe 5 and is intercepted by the top opening of the inclined discharge pipe 5. After being intercepted, the piston pin 8 is guided downward through the inclined discharge pipe 5 and falls down. When the U-shaped clamping frame 6 slides upward and resets to contact the L-shaped stop bar 102, the positioning ring 610 and the top opening of the inclined discharge pipe 5 are aligned at the same height. This ensures that the piston pin 8 being pushed out can be blocked and intercepted by the inclined discharge pipe 5. The inclined discharge pipe 5 can intercept and collect the piston pin 8 being pushed out, avoiding the lack of protection when the piston pin 8 is pushed out and thrown over a large distance and over a large area under the large impact force of the U-shaped discharge frame 605, causing a large area of ​​disorderly scattering, which is not convenient for subsequent centralized collection.

[0029] Preferred, The first end of the convex drive plate 607 has a rectangular sliding groove. When the vertical support slide rod 7 and the convex drive plate 607 slide close to each other, the upper half of the vertical support slide rod 7 slides through the rectangular sliding groove.

[0030] Working principle: Before use, start the grinding motor 3 and the guide motor 4. The two grinding motors 3 are used to drive the grinding wheel 201 at high speed, and the guide motor 4 is used to drive the rubber guide wheel 203 to rotate. In use, first insert the unprocessed piston pin 8 into the two positioning rings 610. Then, slide the U-shaped clamping frame 6 downwards via the T-shaped lever 603, causing the two ends of the piston pin 8 to abut against the two grinding wheels 201, and the middle part to abut against the rubber guide wheel 203 (see reference). Figure 1 and Figure 2 When the two ends of the piston pin 8 come into contact with the two high-speed rotating grinding wheels 201, the two grinding wheels 201 can perform grinding and chamfering on the two ends of the piston pin 8. When the middle part of the piston pin 8 comes into contact with the rotating rubber guide wheel 203, the rubber guide wheel 203 can drive the piston pin 8 to rotate in a circle, and perform automatic and complete circumferential chamfering on the two ends of the piston pin 8. After the chamfering is completed, the T-shaped lever 603 is released, and the U-shaped clamping frame 6 is automatically slid upward and reset by the spring rebound on the hexagonal vertical support rod 101, separating the piston pin 8 after processing from the two grinding wheels 201 and the rubber guide wheel 203, disassembling the piston pin 8 after processing, and replacing the unprocessed piston pin 8 in the two positioning rings 610. When the vertical support rod 7 is in a downward position, it abuts against the tail end of the piston pin 8, positioning the piston pin 8 between itself and the L-shaped limiting rod 6011, thus clamping and securing the piston pin 8 to the two positioning rings 610 (see reference). Figure 5 and Figure 6This prevents the piston pin 8 from falling off the two positioning rings 610 during the grinding and chamfering process, which helps to carry out stable and effective chamfering of the piston pin 8; when the vertical support slide rod 7 slides upward and is pulled away from the tail end of the piston pin 8, the piston pin 8 can be loosened and disassembled for replacement. The vertical support slide rod 7, the second connecting rod 703, and the collar 6061 are connected to form a crank-slider mechanism. Through this mechanism, sliding the collar 6061 to the right can push and drive the vertical support slide rod 7 to compress the spring on it and slide upward. The collar 6061 is also connected to the first connecting rod 6072 and the convex drive plate 607 to form a crank-slider mechanism. Through this mechanism, sliding the convex drive plate 607 downward can push and drive the collar 6061 to slide to the right, providing the driving force for the vertical support slide rod 7 to slide upward. In the initial state, the U-shaped clamping frame 6 is in a state of upward sliding and abutting against the L-shaped stop rod 102, and the vertical support force transmission shaft 6071 is in a state of abutting against the L-shaped stop rod 102. When the U-shaped clamping frame 6 is driven to slide downwards and the vertical support slide rod 7 is in the working state of sliding upwards and disengaging from the tail end of the piston pin 8, when the U-shaped clamping frame 6 is driven to slide downwards and the vertical support force transmission shaft 6071 is disengaged from the L-shaped stop rod 102, the spring on the vertical support slide rod 7 loses the pushing and holding force from the L-shaped stop rod 102, and automatically rebounds and pushes to drive the vertical support slide rod 7 to slide downwards and block and contact the tail end of the piston pin 8. When the U-shaped clamping frame 6 is driven to slide upwards and reset, the vertical support force transmission shaft 6071 and the L-shaped stop rod 102 abut against each other. The vertical support force transmission shaft 6071 and the convex drive plate 607 can be pushed downwards by the L-shaped stop rod 102 and drive the vertical support slide rod 7 to slide upwards and disengage from the tail end of the piston pin 8. In the initial state, the U-shaped clamping frame 6 is in contact with the first vertical support plate 601, and the bottom end of the T-shaped insert rod 608 is in contact with the T-shaped slide rod 6051. When the piston pin 8 is inserted into the two positioning rings 610, it can push and drive the U-shaped clamping frame 6 to slide to the left. During the process of the T-shaped slide rod 6051 sliding to the left with the U-shaped clamping frame 6, when its positioning hole coincides with the T-shaped insert rod 608, the bottom end of the T-shaped slide rod 6051 is inserted into the positioning hole. The T-shaped slide rod 6051 can be inserted and fixed to keep the U-shaped clamping frame 6 in the left sliding position, avoiding the piston pin 8 being subjected to pressure before the vertical support slide rod 7 is inserted and contacts the tail end of the piston pin 8. When the clamping limit is reached, the U-shaped clamping frame 6 slides to the right, pushing the piston pin 8 out from inside the two positioning rings 610. When the U-shaped clamping frame 6 slides upward to reset, the vertical support slide rod 7 is driven to slide upward. A row of gears follows the vertical support slide rod 7 and the drive rod 702 to slide upward and engage with the gear 6091. This engagement drives the L-shaped drive rod 609 to swing upward. Through the power transmission of the upper shaft of the L-shaped drive rod 609, when the L-shaped drive rod 609 swings upward, it can push and drive the T-shaped insert rod 608 to slide upward and separate from the positioning hole, releasing the T-shaped slide rod 6051. When the T-shaped slide rod 6051 is released, the spring on it rebounds and pushes the T-shaped slide rod 6051 and the U-shaped clamping frame 6 to slide to the right at high speed to reset (refer to...). Figure 3 , Figure 4 and Figure 9 The impact drives the piston pin 8, after processing, to automatically slide out from the two positioning rings 610 to unload the material. The piston pin 8, which is pushed out from the two positioning rings 610 by the U-shaped clamping frame 6, slides into the top opening of the inclined discharge pipe 5 and is intercepted by the top opening of the inclined discharge pipe 5. After being intercepted, the piston pin 8 is guided downward through the inclined discharge pipe 5 to slide down and discharge the material.

[0031] The following points should be noted in this article: 1. The accompanying drawings of the embodiments of the present invention only involve the structures involved in the embodiments of the present invention; other structures can refer to general designs.

[0032] 2. Where there is no conflict, the embodiments of the present invention and the features thereof can be combined with each other to obtain new embodiments.

[0033] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A piston pin clamping device for automatic chamfering of piston pins, comprising: The I-shaped base (1) has a hexagonal vertical support rod (101) welded to the middle position of the horizontal support rod on the I-shaped base (1). A U-shaped clamping frame (6) is installed on the upper half of the hexagonal vertical support rod (101) by spring pushing and sliding. The U-shaped clamping frame (6) is characterized in that two positioning rings (610) are symmetrically welded to the bottom ends of the first vertical support plate (601) and the second vertical support plate (602) on the U-shaped clamping frame (6), and the two positioning rings (610) are used to insert and install the piston pin (8); two square positioning sleeves are welded to the outer side of the second vertical support plate (602) at intervals, and vertical support slide rods (7) are slidably installed on the two square positioning sleeves by spring pushing; an L-shaped limiting rod (6011) is welded to the outer side of the bottom part of the first vertical support plate (601), the first end of the piston pin (8) abuts against the L-shaped limiting rod (6011), and the tail end abuts against the vertical support slide rod (7); two limiting plates (701) are symmetrically welded to the middle section of the vertical support slide rod (7); the square positioning sleeves on the upper side A horizontal support positioning shaft (606) is welded on, and a collar (6061) is slidably fitted on the horizontal support positioning shaft (606). A second connecting rod (703) is rotatably connected between the collar (6061) and the outer limiting plate (701). A convex drive plate (607) is slidably fitted on the upper half of the second vertical support plate (602) by a spring. A vertical support force transmission shaft (6071) is welded to the middle of the top of the convex drive plate (607). A first connecting rod (6072) is rotatably installed between the convex drive plate (607) and the collar (6061). An L-shaped stop bar (102) is welded to the top of the hexagonal vertical support rod (101). When the vertical support force transmission shaft (6071) slides upward with the U-shaped clamping frame (6), it abuts against the L-shaped stop bar (102). A U-shaped unloading frame (605) is installed on the first vertical support plate (601). A T-shaped slide rod (6051) is welded to the inner side of the top of the U-shaped unloading frame (605). The T-shaped slide rod (6051) slides through and slides with the bottom part of the first vertical support plate (601) by spring push. A T-shaped insert rod (608) is slidably installed on the outer side of the first vertical support plate (601) near the U-shaped unloading frame (605) by a spring push. The bottom end of the T-shaped insert rod (608) is inserted and connected to the T-shaped slide rod (6051), and a longitudinal drive groove is provided on the longitudinal support rod section of the T-shaped insert rod (608). An L-shaped drive rod (609) is rotatably mounted on the outer side of the first vertical support plate (601) near the T-shaped insert rod (608). A gear (6091) is fitted on the first end of the rod segment of the L-shaped drive rod (609) that is perpendicular to the first vertical support plate (601). The gear (6091) is connected to the rod segment of the L-shaped drive rod (609) that is perpendicular to the first vertical support plate (601) through an internal ratchet mechanism. The first end of the rod segment of the L-shaped drive rod (609) that is parallel to the first vertical support plate (601) is welded with a dial shaft, which is inserted into the longitudinal drive groove. The inner limiting plate (701) is welded with a continuous vertical bend drive rod (702). A row of toothed plates is provided on the vertical rod section at the head end of the drive rod (702). When the row of toothed plates slides upward with the vertical support slide rod (7), it meshes with the gear (6091). The top of the I-shaped base (1) is welded with a mounting frame (2). The mounting frame (2) is composed of a horizontal support base rod and two inclined mounting rods symmetrically welded to both ends of the horizontal support base rod. A grinding wheel (201) is rotatably mounted at the first end of the inclined mounting rod, and a grinding motor (3) is rotatably mounted at the tail end. The grinding motor (3) and the grinding wheel (201) are connected by a synchronous belt drive. A vertical mounting rod (202) is welded to the middle section of the cross brace base rod. A rubber guide wheel (203) is rotatably mounted on the top of the vertical mounting rod (202). A guide motor (4) is threadedly fastened to the bottom part. The guide motor (4) and the rubber guide wheel (203) are connected by synchronous belt drive.

2. The piston pin clamping device for automatic chamfering of piston pins according to claim 1, characterized in that, The top of the U-shaped clamping frame (6) is welded with a T-shaped handle (603) and a slip ring (604). The T-shaped handle (603) and the slip ring (604) are arranged opposite to each other, and the slip ring (604) slides with the upper half of the hexagonal vertical support rod (101) by spring push.

3. The piston pin clamping device for automatic chamfering of piston pins according to claim 1, characterized in that, An inclined unloading pipe (5) is provided in the adjacent space on one side of the mounting frame (2). A support tray (501) is welded to the top opening of the inclined unloading pipe (5) and supports the hexagonal vertical support rod (101). When the U-shaped clamping frame (6) slides upward and comes into contact with the L-shaped stop rod (102), the positioning ring (610) is aligned with the top opening of the inclined unloading pipe (5) at the same height.

4. The piston pin clamping device for automatic chamfering of piston pins according to claim 1, characterized in that, The first end of the convex drive plate (607) has a rectangular sliding groove. When the vertical support slide rod (7) and the convex drive plate (607) slide close to each other, the upper half of the vertical support slide rod (7) slides through the rectangular sliding groove.

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