Piston pin clamping device for automatic chamfering of piston pin

Abstract

The invention provides a piston pin clamping device for automatic chamfering of a piston pin, and relates to the technical field of clamping devices for grinding machining.The piston pin clamping device is characterized in that a transverse support positioning shaft is welded to a square positioning sleeve on the upper side, and the transverse support positioning shaft is slidably sleeved with a shaft ring; the upper half section of the second vertical supporting plate is slidably sleeved with a convex driving plate through pushing of a spring, and a vertical supporting force transmission shaft is welded to the middle position of the top end of the convex driving plate; a first connecting rod is rotationally mounted between the convex driving plate and the shaft ring; an L-shaped stop lever is welded to the top end of the six-edge vertical supporting rod, the vertical supporting force transmission shaft abuts against and makes contact with the L-shaped stop lever when sliding upwards along with the U-shaped clamping frame, and the vertical supporting force transmission shaft is used in cooperation with a spring on the vertical supporting sliding rod through power transmission of the vertical supporting force transmission shaft. The vertical supporting sliding rod can be indirectly driven to slide up and down by the driving force of up and down sliding of the U-shaped clamping frame to automatically tighten the piston pin, and the trouble that the vertical supporting sliding rod needs to be additionally and manually tightened and opened when the piston pin is disassembled and replaced every time is omitted.

Description

Technical Field

[0001] The invention relates to the technical field of clamping devices for grinding processing, and in particular to a piston pin clamping device for automatic chamfering of a piston pin. Background Art

[0002] Chamfering the piston pin can improve its processing performance, assembly performance, performance and reliability. The piston pin is generally chamfered by grinding. When grinding and chamfering the piston pin, a clamping device is required for positioning.

[0003] When designing the existing clamping devices, they are mostly designed separately as a main body independent of the chamfering processing equipment, and are not associated with the chamfering processing equipment for an overall composite optimization design. As a result, the clamping devices cannot be well adapted to the chamfering processing equipment and cannot be well adapted to the processing conditions on the chamfering processing equipment. As a result, the components on the clamping devices that clamp, position or limit the piston pin cannot be automatically switched or loosened using a certain form of torque on the chamfering processing equipment. As a result, each time the piston pin 8 on the clamping device is disassembled and replaced, it is necessary to manually switch the positioning or limiting components, which is troublesome and inconvenient to operate and use, and is not conducive to improving the efficiency of chamfering the piston pin using the clamping device. Summary of the invention

[0004] In view of this, the present invention provides a piston pin clamping device for automatic chamfering of the piston pin 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 the positioning or limiting component, which is troublesome and inconvenient to operate.

[0005] The technical solution proposed by the present invention is: a piston pin clamping device for automatic chamfering of a piston pin, specifically comprising: an I-shaped base, a hexagonal vertical support rod is welded at the middle position of a horizontal support rod on the I-shaped base, and a U-shaped clamping frame is installed on the upper half of the hexagonal vertical support rod through spring pushing and sliding; It is characterized in that two positioning rings are symmetrically welded at the bottom ends of the first vertical support plate and the second vertical support plate on the U-shaped clamping frame, and the two positioning rings are used for inserting and installing the piston pin; two square positioning sleeves are welded at an interval up and down on the outer side of the second vertical support plate, and a vertical support slide bar is installed on the two square positioning sleeves by spring pushing and sliding together; an L-shaped limiting rod is welded on the outer side of the bottom end part of the first vertical support plate, and the head end of the piston pin is in contact with the L-shaped limiting rod, and the tail end is in contact with the vertical support slide bar; the middle section of the vertical support slide bar is symmetrically welded with two a limit plate; a horizontal support positioning shaft is welded on the square positioning sleeve on the upper side, and a shaft ring is slidably sleeved on the horizontal support positioning shaft, and a second connecting rod is rotatably connected between the shaft ring and the outer limit plate; the upper half of the second vertical support plate is slidably sleeved with a convex driving plate through a spring push, and a vertical support force transmission shaft is welded at the middle position of the top end of the convex driving plate; a first connecting rod is rotatably installed between the convex driving plate and the shaft ring; an L-shaped baffle rod is welded on the top end of the hexagonal vertical support rod, and the vertical support force transmission shaft contacts the L-shaped baffle rod 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, and a T-shaped sliding rod is welded on the inner side of the top of the U-shaped unloading frame. The T-shaped sliding rod is pushed by a spring to slide through and fit with the bottom end of the first vertical support plate; A T-shaped plug rod is installed on the outer side of the first vertical support plate near the U-shaped unloading frame through a spring push and sliding, the bottom end of the T-shaped plug rod is inserted and matched with the T-shaped sliding rod, and a longitudinal driving groove is opened on the longitudinal support rod section of the T-shaped plug rod.

[0007] Furthermore, An L-shaped driving rod is rotatably mounted on the outer side of the first vertical support plate near the T-shaped insertion rod, and a gear is mounted on the head end of the rod section of the L-shaped driving rod perpendicular to the first vertical support plate, and the gear is transmission-connected to the rod section of the L-shaped driving rod perpendicular to the first vertical support plate through an internal ratchet mechanism; A shifting shaft is welded to the head end of the rod section on the L-shaped driving rod which is parallel to the first vertical support plate, and the shifting shaft is plug-fitted with the longitudinal driving groove.

[0008] Furthermore, A driving rod with continuous vertical bending is welded on the inner limiting plate, and a row of tooth plates is arranged on the vertical rod section at the head end of the driving rod. When the row of tooth plates follows the vertical support sliding rod to slide upward, they mesh with the gears.

[0009] Furthermore, A T-shaped handlebar and a slip ring are welded to the top of the U-shaped clamping frame. The T-shaped handlebar and the slip ring are arranged opposite to each other, and the slip ring is slidably matched with the upper half of the hexagonal vertical support rod through spring pushing.

[0010] Furthermore, A mounting frame is welded above the top of the I-shaped base, and the mounting frame as a whole is composed of a horizontal support bottom rod and two inclined mounting rods symmetrically welded at both ends of the horizontal support bottom rod. A grinding wheel is rotatably mounted on the head end of the inclined mounting rod, and a grinding motor is rotatably mounted on the tail end. The grinding motor and the grinding wheel are connected through a synchronous belt drive. A vertical mounting rod is welded on the middle section of the horizontal support bottom rod, a rubber guide wheel is rotatably mounted on the top of the vertical mounting rod, a guide motor is threadedly fastened on the bottom side part, and the guide motor is connected to the rubber guide wheel through a synchronous belt transmission.

[0011] Furthermore, When the piston pin is chamfered, the U-shaped clamping frame is slid downward to drive 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 arranged in the adjacent space on one side of the mounting frame, and a supporting tray supported by the hexagonal vertical support rod is welded on the top opening of the inclined unloading pipe. When the U-shaped clamping frame slides upward and abuts against the L-shaped baffle rod, the positioning ring is aligned at the same height with the top opening of the inclined unloading pipe.

[0013] Furthermore, A rectangular slide groove penetrates through the head end of the convex driving plate. When the vertical support slide bar and the convex driving plate slide toward each other, the upper half of the vertical support slide bar slides through and cooperates with the rectangular slide groove.

[0014] The present invention provides a piston pin clamping device for automatic chamfering of a piston pin, which has the following beneficial effects: 1. Through the power transmission of the vertical support force transmission shaft and in conjunction with the spring on the vertical support slide bar, the vertical support slide bar can indirectly utilize the driving force of the U-shaped clamping frame sliding up and down to drive the sliding up and down to automatically loosen or tighten the piston pin. Compared with the existing technology, it saves the trouble of manually loosening or tightening the vertical support slide bar every time the piston pin is disassembled and replaced. The operation is more convenient and time-saving, which is conducive to improving the chamfering efficiency of the piston pin.

[0015] Second, when the U-shaped clamping frame slides upward to reset and pushes to drive the vertical support slide bar upward, a row of teeth follow the vertical support slide bar and the driving rod to slide upward and engage with the gear, and engage to drive the L-shaped driving rod to swing upward. Through the power transmission of the shift shaft on the L-shaped driving rod, when the L-shaped driving rod swings upward, it can push to drive the T-shaped plug rod to slide upward and separate from the positioning hole to release the T-shaped sliding bar. When the T-shaped sliding bar is released, the spring on it rebounds and pushes to drive the T-shaped sliding bar and the U-shaped clamping frame to slide rightward at high speed to reset (refer to Figure, Figure and Figure), and impact drives the processed piston pin to automatically slide out of the two locating rings to unload. This saves the trouble of manually extracting and unloading the piston pin after each chamfering operation, which helps to further improve the chamfering efficiency of the piston pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

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

[0018] In the attached drawings, the side where the T-shaped handlebar is installed is marked as the front side, and the side where the L-shaped limiting rod is installed is marked as the left side.

[0019] Figure 1 The overall front side structural schematic diagram of the present invention is shown; Figure 2 The overall rear side structure schematic diagram of the present invention is shown; Figure 3 It shows a schematic diagram of the front structure of the U-shaped sliding frame of the present invention in a downward sliding state; Figure 4 It shows a schematic diagram of the rear side structure of the U-shaped sliding frame of the present invention in a downward sliding state; 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 of a disassembled state of the vertical support slide bar of the present invention is shown; Figure 8 The present invention shows Figure 5 The enlarged structural diagram of part A in the middle; Fig. 9 The present invention shows Figure 3 The enlarged structural diagram of part B is shown in the figure.

[0020] List of reference numerals: 1. I-shaped base; 101. Hexagonal vertical support rod; 102. L-shaped stop rod; 2. Mounting frame; 201. Grinding wheel; 202. Vertical mounting rod; 203. Rubber guide wheel; 3. Grinding motor; 4. Guide motor; 5. Tilt discharge pipe; 501. Support tray; 6. U-shaped clamping frame; 601. first vertical support plate; 6011. L-shaped limit rod; 602. second vertical support plate; 603. T-shaped handlebar; 604. sliding ring; 605. U-shaped unloading frame; 6051. T-shaped sliding rod; 606. horizontal support positioning shaft; 6061. shaft ring; 607. convex driving plate; 6071. vertical support force transmission shaft; 6072. first connecting rod; 608. T-shaped plug rod; 609. L-shaped driving rod; 6091. gear; 610. positioning ring; 7, vertical support slide bar; 701, limit plate; 702, drive rod; 703, second connecting rod; 8. Piston pin. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0022] Please refer to Figures 1 to 9 , an embodiment provided by the present invention: The present invention proposes a piston pin clamping device for automatic chamfering of a piston pin, comprising: an I-shaped base 1, a hexagonal vertical support rod 101, an L-shaped blocking rod 102, a mounting frame 2, a grinding wheel 201, an upright mounting rod 202, a rubber guide wheel 203, a grinding motor 3, a guide motor 4, an inclined discharge 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 handlebar 603, a slip ring 604, a U-shaped discharge frame 605, and a T-shaped slide rod 606. 051, horizontal support positioning shaft 606, shaft ring 6061, convex drive plate 607, vertical support force transmission shaft 6071, first connecting rod 6072, T-shaped plug rod 608, L-shaped drive rod 609, gear 6091, positioning ring 610, vertical support slide bar 7, limit plate 701, drive rod 702, second connecting rod 703, piston pin 8, a hexagonal vertical support rod 101 is welded in the middle position of the horizontal support rod on the I-shaped base 1, and a U-shaped clamping frame 6 is installed on the upper half of the hexagonal vertical support rod 101 through spring pushing and sliding; Two positioning rings 610 are symmetrically welded at 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 for inserting and installing the piston pin 8; two square positioning sleeves are welded at intervals on the outer side of the second vertical support plate 602, and the vertical support slide bar 7 is installed on the two square positioning sleeves by spring pushing and sliding together; an L-shaped limiting rod 6011 is welded on the outer side of the bottom end part of the first vertical support plate 601, and the head end of the piston pin 8 is in contact with the L-shaped limiting rod 6011, and the tail end is in contact with the vertical support slide bar 7; two limiting plates 701 are symmetrically welded on the middle section of the vertical support slide bar 7; There is a horizontal support positioning shaft 606, on which a shaft ring 6061 is slidably mounted, and a second connecting rod 703 is rotatably connected between the shaft ring 6061 and the outer limit plate 701; the upper half of the second vertical support plate 602 is slidably mounted with a convex driving plate 607 through a spring push, and a vertical support force transmission shaft 6071 is welded to the middle position of the top of the convex driving plate 607; a first connecting rod 6072 is rotatably mounted between the convex driving plate 607 and the shaft ring 6061; an L-shaped blocking rod 102 is welded to the top of the hexagonal vertical support rod 101, and the vertical support force transmission shaft 6071 abuts against the L-shaped blocking rod 102 when sliding upward with the U-shaped clamping frame 6; A mounting frame 2 is welded above the top of the I-shaped base 1. The mounting frame 2 is composed of a horizontal support bottom rod and two inclined mounting rods symmetrically welded at both ends of the horizontal support bottom rod. A grinding wheel 201 is rotatably mounted on the head end of the inclined mounting rod, and a grinding motor 3 is rotatably mounted on the tail end. The grinding motor 3 is connected to the grinding wheel 201 through 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 on the middle section of the horizontal support bottom 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 on the bottom part, and the guide motor 4 is connected to the rubber guide wheel 203 through a synchronous belt transmission, and the guide motor 4 is used to rotate and drive the rubber guide wheel 203; When the piston pin 8 is chamfered, the unprocessed piston pin 8 is first inserted into the two positioning rings 610, and then the U-shaped clamping frame 6 is slid downward to drive 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 (refer to Figure 1 and Figure 2), when the front and rear ends of the piston pin 8 are in contact with the two high-speed rotating grinding wheels 201, the two grinding wheels 201 can perform grinding and chamfering processing on the front and rear ends of the piston pin 8, and when the middle part of the piston pin 8 is in 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 automatically perform complete circumferential chamfering processing on the front and rear ends of the piston pin 8. When the chamfering processing is completed, the U-shaped clamping frame 6 is slid and reset upward to separate the processed piston pin 8 from the two grinding wheels 201 and the rubber guide wheel 203, and the processed piston pin 8 is disassembled and the unprocessed piston pin 8 is replaced in the two positioning rings 610. The U-shaped clamping frame 6 is automatically driven to slide upward and reset by the spring rebound on the hexagonal vertical support rod 101; The vertical support slide bar 7 in the downward state abuts against the tail end of the piston pin 8, and the piston pin 8 can be inserted and positioned between it and the L-shaped limit rod 6011, and the piston pin 8 is clamped and fastened to the two positioning rings 610 (refer to Figure 5 and Figure 6), in the process of grinding and chamfering, the piston pin 8 is prevented from falling off from the two positioning rings 610, which is helpful to implement stable and effective chamfering of the piston pin 8; when the vertical support slide bar 7 slides upward and is pulled away from the tail end of the piston pin 8, the piston pin 8 can be loosened to carry out disassembly and replacement of the piston pin 8; the vertical support slide bar 7, the second connecting rod 703 and the shaft ring 6061 are connected together to form a crank slider mechanism, through which the shaft ring 6061 can be slid to the right to push the vertical support slide bar 7 to compress the spring thereon and slide upward; the shaft ring 6061 is also connected to the The first connecting rod 6072 and the convex driving plate 607 are connected together to form a crank slider mechanism, through which the convex driving plate 607 that slides downward can push and drive the shaft ring 6061 to slide to the right, providing a driving force for the vertical support slide bar 7 to slide upward; in the initial state, the U-shaped clamping frame 6 is in a state of sliding upward and abutting against the L-shaped blocking rod 102, the vertical support force transmission shaft 6071 is in a state of abutting against the L-shaped blocking rod 102, and the vertical support slide bar 7 is in a state of sliding upward and being pulled away from the tail end of the piston pin 8. When the U-shaped clamping frame 6 is driven to slide downward and the vertical support force transmission shaft 6071 is disengaged from the L-shaped blocking rod 102, the spring on the vertical support slide bar 7 loses the pushing and holding force from the L-shaped blocking rod 102, and automatically rebounds and pushes to drive the vertical support slide bar 7 to slide downward and abut against the tail end of the piston pin 8. When the U-shaped clamping frame 6 is driven to slide upward and reset, the vertical support force transmission shaft 6071 abuts against the L-shaped blocking rod 102, and the vertical support force transmission shaft 6071 and the convex driving plate 607 can be driven by the L-shaped blocking rod 102 to slide downward and drive the control The vertical support slide bar 7 is controlled to slide upward and be separated from the tail end of the piston pin 8, and then through the power transmission of the vertical support force transmission shaft 6071 and in conjunction with the spring on the vertical support slide bar 7, the vertical support slide bar 7 can indirectly utilize the driving force of the up and down sliding of the U-shaped clamping frame 6 to drive the up and down sliding to automatically loosen or tighten the piston pin 8. Compared with the prior art, the trouble of manually loosening or tightening the vertical support slide bar 7 every time the piston pin 8 is disassembled and replaced is avoided. The operation is more convenient and time-saving, which is conducive to improving the efficiency of chamfering processing of the piston pin 8.

[0023] Preferably, A U-shaped unloading frame 605 is installed on the first vertical support plate 601, and a T-shaped slide bar 6051 is welded on the inner side of the top of the U-shaped unloading frame 605, and the T-shaped slide bar 6051 is slidably fitted through the bottom end part of the first vertical support plate 601 through spring pushing; a T-shaped plug rod 608 is slidably installed on the outer side of the first vertical support plate 601 near the U-shaped unloading frame 605 through spring pushing, and a positioning hole is penetrated through the T-shaped slide bar 6051, and the bottom end of the T-shaped plug rod 608 is plugged into the positioning hole, and a longitudinal driving groove is provided on the longitudinal support rod section of the T-shaped plug rod 608.

[0024] Preferably, An L-shaped driving rod 609 is rotatably installed on the outer side of the first vertical support plate 601 near the T-shaped insertion rod 608. The head end of the rod section of the L-shaped driving rod 609 that is perpendicular to the first vertical support plate 601 is provided with a gear 6091. The gear 6091 is transmission-connected to the rod section of the L-shaped driving rod 609 that is perpendicular to the first vertical support plate 601 through an internal ratchet mechanism. A shift shaft is welded to the head end of the rod section of the L-shaped driving rod 609 that is parallel to the first vertical support plate 601, and the shift shaft is plugged into the longitudinal driving groove.

[0025] Preferably, A driving rod 702 with continuous vertical bending is welded on the inner limiting plate 701. A row of teeth is arranged on the vertical rod section at the head end of the driving rod 702. When the row of teeth follows the vertical support slide bar 7 to slide upward, it meshes with the gear 6091.

[0026] In the initial state, the U-shaped clamping frame 6 is in a state of abutting and contacting with the first vertical support plate 601, and the bottom end of the T-shaped insertion rod 608 is in a state of abutting and contacting with the T-shaped sliding rod 6051. When the piston pin 8 is inserted and installed inside the two positioning rings 610, the U-shaped clamping frame 6 can be pushed to slide to the left. In the process that the T-shaped sliding rod 6051 follows the U-shaped clamping frame 6 to slide to the left, when the positioning hole on it coincides with the T-shaped insertion rod 608, the bottom end of the T-shaped sliding rod 6051 is plugged and matched with the positioning hole; the T-shaped sliding rod 6051 can be plugged and fixed to the T-shaped sliding rod 6051, so that the U-shaped clamping frame 6 is kept in the use state of the left sliding position, avoiding the vertical support sliding rod 7 from abutting and contacting with the tail end of the piston pin 8 before it is inserted down, thereby blocking the piston pin 8. When the clamping limit is reached, the U-shaped clamping frame 6 slides to the right to push the piston pin 8 out from the two positioning rings 610; when the U-shaped clamping frame 6 slides upward to reset and pushes to drive the vertical support slide bar 7 to slide upward, a row of teeth follows the vertical support slide bar 7 and the driving rod 702 to slide upward to engage with the gear 6091, and engages to drive the L-shaped driving rod 609 to swing upward. Through the power transmission of the shift shaft on the L-shaped driving rod 609, when the L-shaped driving rod 609 swings upward, it can push to drive the T-shaped insertion rod 608 to slide upward and separate from the positioning hole to release the T-shaped slide bar 6051. When the T-shaped slide bar 6051 is released, the spring on it rebounds and pushes to drive the T-shaped slide bar 6051 and the U-shaped clamping frame 6 to slide rightward at high speed to reset (refer to Figure 3 , Figure 4 and Fig. 9 ), and impact drives the piston pin 8 after processing to automatically slide out from the inside of the two positioning rings 610 to unload, which saves the trouble of manually extracting and unloading the piston pin 8 after each chamfering operation is completed, and helps to further improve the chamfering efficiency of the piston pin 8; It is worth noting that: a row of teeth follows the vertical support slide bar 7 and the driving rod 702 to slide upward and mesh with the gear 6091 for transmission, and when the T-shaped plug rod 608 is driven to slide upward and be pulled out, it slides upward and separates from the gear 6091 (refer to Fig. 9 ), which can release the upward thrust exerted by the vertical support slide bar 7 on the T-shaped insertion rod 608 after it is slid up and pulled out, so that the T-shaped insertion rod 608 can maintain the tendency to slide downward under the rebound thrust of the spring compressed thereon, and prepare for the insertion and positioning of the T-shaped slide bar 6051 and the U-shaped clamping frame 6 by plugging and cooperating with the positioning hole again; the internal ratchet mechanism on the gear 6091 has the characteristic of unidirectional transmission of driving force, and when a row of teeth follows the vertical support slide bar 7 to slide upward and mesh and drive the gear 6091 to rotate counterclockwise, the internal ratchet mechanism connects the gear 6091 with the L-shaped driving rod 609 to ensure that when the vertical support slide bar 7 slides upward, it can also drive the T-shaped slide bar 6051 to slide up and be pulled out, thereby releasing the T-shaped Slide bar 6051 and U-shaped clamping frame 6; when a row of teeth slide downward and reset along with the vertical support slide bar 7, the internal ratchet mechanism disconnects the transmission connection between the gear 6091 and the L-shaped drive rod 609, and a row of teeth mesh to drive the gear 6091 to idle clockwise, preventing the gear 6091 from being connected to the L-shaped drive rod 609 and the T-shaped slide bar 6051 during clockwise rotation, causing the T-shaped slide bar 6051 which is in a stationary state and is plugged into the positioning hole to interfere with and restrict the clockwise rotation of the gear 6091, thereby hindering the normal sliding and resetting of a row of teeth, the drive rod 702 and the vertical support slide bar 7, and helping to ensure the normal and effective implementation of the automatic tightening and loosening 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] Preferably, A T-shaped handlebar 603 and a slip ring 604 are welded to the top of the U-shaped clamping frame 6. The T-shaped handlebar 603 and the slip ring 604 are arranged opposite to each other, and the slip ring 604 is pushed by a spring to slide with the upper half of the hexagonal vertical support rod 101; The U-shaped clamping frame 6 can be driven to slide downward via the T-shaped handle bar 603 .

[0028] Preferably, An inclined discharge pipe 5 is provided in an adjacent space on one side of the mounting frame 2, and a support tray 501 is welded to the top opening of the inclined discharge pipe 5 and is supported by the hexagonal vertical support rod 101; The piston pin 8 that is ejected from the two positioning rings 610 by the U-shaped clamping frame 6 impacts and slides into the top opening of the inclined unloading pipe 5 and is intercepted by the top opening part of the inclined unloading pipe 5. After being intercepted, the piston pin 8 is guided downward by the inclined unloading pipe 5 to slide and discharge. When the U-shaped clamping frame 6 slides upward to reset and abuts against the L-shaped blocking rod 102, the piston pin 8 is ejected to discharge, and the positioning ring 610 is aligned at the same height with the top opening of the inclined unloading pipe 5, which can ensure that the piston pin 8 that is ejected to discharge can be blocked and intercepted by the inclined unloading pipe 5. The inclined unloading pipe 5 can intercept and collect the piston pin 8 that is ejected to discharge, so as to avoid the piston pin 8 lacking protection when being ejected to discharge, and flying over a large distance and a large range under the action of the large impact force of the U-shaped unloading frame 605, resulting in large-scale disorderly scattering, which is not convenient for subsequent centralized collection.

[0029] Preferably, A rectangular slide groove penetrates the head end of the convex driving plate 607. When the vertical support slide bar 7 and the convex driving plate 607 slide toward each other, the upper half of the vertical support slide bar 7 slides through the rectangular slide 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 to rotate at high speed, and the guide motor 4 is used to rotate and drive the rubber guide wheel 203; When in use, firstly, the unprocessed piston pin 8 is inserted and installed in the two positioning rings 610, and then the U-shaped clamping frame 6 is slid downward through the T-shaped handle 603, so that the two ends of the piston pin 8 are in contact with the two grinding wheels 201, and the middle part is in contact with the rubber guide wheel 203 (refer to Figure 1 and Figure 2 ), when the front and rear ends of the piston pin 8 are in contact with the two high-speed rotating grinding wheels 201, the two grinding wheels 201 can perform grinding and chamfering processing on the front and rear ends of the piston pin 8, and when the middle part of the piston pin 8 is in 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 automatically perform complete circumferential chamfering processing on the front and rear ends of the piston pin 8. When the chamfering processing is completed, the T-shaped handle 603 is released, and the U-shaped clamping frame 6 is automatically driven by the spring rebound on the hexagonal vertical support rod 101 to slide upward and reset, and the processed piston pin 8 is separated from the two grinding wheels 201 and the rubber guide wheel 203, and the processed piston pin 8 is disassembled and the unprocessed piston pin 8 is replaced in the two positioning rings 610; The vertical support slide bar 7 in the downward state abuts against the tail end of the piston pin 8, and the piston pin 8 can be inserted and positioned between it and the L-shaped limit rod 6011, and the piston pin 8 is clamped and fastened to the two positioning rings 610 (refer to Figure 5 and Figure 6), in the process of grinding and chamfering, the piston pin 8 is prevented from falling off from the two positioning rings 610, which is helpful to implement stable and effective chamfering of the piston pin 8; when the vertical support slide bar 7 slides upward and is pulled away from the tail end of the piston pin 8, the piston pin 8 can be loosened to be disassembled and replaced; The vertical support slide bar 7, the second connecting rod 703 and the shaft ring 6061 are connected together to form a crank slider mechanism, through which the shaft ring 6061 can be slid to the right to push and drive the vertical support slide bar 7 to slide upward by compressing the spring thereon; the shaft ring 6061 is connected together with the first connecting rod 6072 and the convex driving plate 607 to form a crank slider mechanism, through which the convex driving plate 607 can be slid downward to push and drive the shaft ring 6061 to slide to the right, providing a driving force for the vertical support slide bar 7 to slide upward; in the initial state, the U-shaped clamping frame 6 is in a state of sliding upward and abutting against the L-shaped blocking rod 102, and the vertical support force transmission shaft 6071 is in a state of abutting against the L-shaped blocking rod 102 to make the vertical support slide bar 7 slide upward. When the U-shaped clamping frame 6 is driven to slide downward, the vertical support force transmission shaft 6071 is disengaged from the L-shaped blocking rod 102, and the spring on the vertical support slide bar 7 loses the pushing and holding force from the L-shaped blocking rod 102, and automatically rebounds and pushes to drive the vertical support slide bar 7 to slide downward and abut against the tail end of the piston pin 8. When the U-shaped clamping frame 6 is driven to slide upward and reset, the vertical support force transmission shaft 6071 abuts against the L-shaped blocking rod 102, and the vertical support force transmission shaft 6071 and the convex driving plate 607 can be driven by the L-shaped blocking rod 102 to slide downward, and drive and control the vertical support slide bar 7 to slide upward and be separated from the tail end of the piston pin 8. In the initial state, the U-shaped clamping frame 6 is in a state of being in contact with the first vertical support plate 601, and the bottom end of the T-shaped insertion rod 608 is in a state of being in contact with the T-shaped sliding rod 6051. When the piston pin 8 is inserted and installed inside the two positioning rings 610, the U-shaped clamping frame 6 can be pushed to slide to the left. In the process of the T-shaped sliding rod 6051 following the U-shaped clamping frame 6 to slide to the left, when the positioning hole on it coincides with the T-shaped insertion rod 608, the bottom end of the T-shaped sliding rod 6051 is plugged and matched with the positioning hole; the T-shaped sliding rod 6051 can be plugged and fixed to the T-shaped sliding rod 6051, so that the U-shaped clamping frame 6 is kept in the state of being used in the left sliding position, avoiding the vertical support sliding rod 7 from being in contact with the tail end of the piston pin 8 before being inserted down, and implementing When the clamping limit is blocked, the U-shaped clamping frame 6 slides to the right to push the piston pin 8 out from the two positioning rings 610; when the U-shaped clamping frame 6 slides upward to reset, the vertical support slide bar 7 is driven to slide upward, and a row of teeth follow the vertical support slide bar 7 and the driving rod 702 to slide upward to engage with the gear 6091, and the engagement drives the L-shaped driving rod 609 to swing upward. Through the power transmission of the shift shaft on the L-shaped driving rod 609, when the L-shaped driving rod 609 swings upward, it can push and drive the T-shaped insertion rod 608 to slide upward and separate from the positioning hole to release the T-shaped slide bar 6051. When the T-shaped slide bar 6051 is released, the spring on it rebounds and pushes and drives the T-shaped slide bar 6051 and the U-shaped clamping frame 6 to slide rightward at high speed to reset (refer to Figure 3 , Figure 4 and Fig. 9 ), and impact and drive the piston pin 8 after processing to automatically slide out from the inside of the two positioning rings 610 to unload; The piston pin 8 is pushed out from the two positioning rings 610 by the U-shaped clamping frame 6, and slides into the top opening of the inclined discharge pipe 5 and is intercepted by the top opening part of the inclined discharge pipe 5. After being intercepted, the piston pin 8 is guided downward through the inclined discharge pipe 5 to slide and discharge the material.

[0031] In this article, there are a few points to note: 1. The drawings of the embodiments of the present invention only involve structures related to the embodiments of the present invention, and other structures can refer to the general design.

[0032] 2. In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to obtain new embodiments.

[0033] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A piston pin clamping device for automatic chamfering of a piston pin, comprising: An I-shaped base (1), wherein a hexagonal vertical support rod (101) is welded to the middle position of the horizontal support rod on the I-shaped base (1), and a U-shaped clamping frame (6) is slidably installed on the upper half of the hexagonal vertical support rod (101) by means of a spring push; The invention is characterized in that two positioning rings (610) are symmetrically welded at 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 for inserting and installing the piston pin (8); two square positioning sleeves are welded at an interval up and down on the outer side of the second vertical support plate (602), and a vertical support slide bar (7) is installed on the two square positioning sleeves by spring pushing and sliding together; an L-shaped limiting rod (6011) is welded on the outer side of the bottom end part of the first vertical support plate (601), and the head end of the piston pin (8) is in contact with the L-shaped limiting rod (6011), and the tail end is in contact with the vertical support slide bar (7); two limiting plates (701) are symmetrically welded on the middle section of the vertical support slide bar (7); the square positioning sleeves on the upper side are welded A horizontal support positioning shaft (606) is welded thereto, a shaft ring (6061) is slidably sleeved on the horizontal support positioning shaft (606), and a second connecting rod (703) is rotatably connected between the shaft ring (6061) and the outer limiting plate (701); the upper half of the second vertical support plate (602) is slidably sleeved with a convex driving plate (607) through a spring push, and a vertical support force transmission shaft (6071) is welded at the middle position of the top end of the convex driving plate (607); a first connecting rod (6072) is rotatably mounted between the convex driving plate (607) and the shaft ring (6061); an L-shaped blocking rod (102) is welded at the top end of the hexagonal vertical support rod (101), and the vertical support force transmission shaft (6071) abuts against the L-shaped blocking rod (102) when sliding upward following the U-shaped clamping frame (6).

2. A piston pin clamping device for automatic chamfering of a piston pin according to claim 1, characterized in that: 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 end of the U-shaped unloading frame (605), and the T-shaped sliding rod (6051) is pushed by a spring to slide through the bottom end of the first vertical support plate (601); A T-shaped plug rod (608) is installed on the outer side of the first vertical support plate (601) near the U-shaped discharge frame (605) through a spring push-pull sliding arrangement. The bottom end of the T-shaped plug rod (608) is inserted and engaged with the T-shaped slide bar (6051), and a longitudinal driving groove is provided on the longitudinal support rod section of the T-shaped plug rod (608).

3. A piston pin clamping device for automatic chamfering of a piston pin according to claim 2, characterized in that: An L-shaped driving rod (609) is rotatably mounted on the outer side of the first vertical support plate (601) near the T-shaped plug rod (608); a gear (6091) is sleeved on the head end of the rod section of the L-shaped driving rod (609) perpendicular to the first vertical support plate (601); the gear (6091) is transmission-connected to the rod section of the L-shaped driving rod (609) perpendicular to the first vertical support plate (601) via an internal ratchet mechanism; A shifting shaft is welded to the head end of the rod section on the L-shaped driving rod (609) that is parallel to the first vertical support plate (601), and the shifting shaft is plug-fitted into the longitudinal driving groove.

4. A piston pin clamping device for automatic chamfering of a piston pin according to claim 3, characterized in that: A continuously vertically bent driving rod (702) is welded to the inner limiting plate (701), and a row of teeth are arranged on the vertical rod section at the head end of the driving rod (702). When the row of teeth follows the vertical support slide rod (7) to slide upward, they mesh with the gear (6091).

5. The piston pin clamping device for automatic chamfering of a piston pin according to claim 1, characterized in that: A T-shaped handlebar (603) and a slip ring (604) are welded to the top of the U-shaped clamping frame (6); the T-shaped handlebar (603) and the slip ring (604) are arranged opposite to each other, and the slip ring (604) is slidably matched with the upper half of the hexagonal vertical support rod (101) through spring pushing.

6. A piston pin clamping device for automatic chamfering of a piston pin according to claim 5, characterized in that: A mounting frame (2) is welded above the top of the I-shaped base (1), the mounting frame (2) as a whole being composed of a cross brace bottom bar and two inclined mounting bars symmetrically welded to the two ends of the cross brace bottom bar, a grinding wheel (201) is rotatably mounted on the head end of the inclined mounting bar, and a grinding motor (3) is rotatably mounted on the tail end, the grinding motor (3) being connected to the grinding wheel (201) via a synchronous belt drive; A vertical installation rod (202) is welded to the middle section of the horizontal support bottom rod, a rubber guide wheel (203) is rotatably mounted on the top of the vertical installation rod (202), a guide motor (4) is threadedly fastened to the bottom side portion, and the guide motor (4) is connected to the rubber guide wheel (203) through a synchronous belt transmission.

7. A piston pin clamping device for automatic chamfering of a piston pin according to claim 6, characterized in that: When the piston pin (8) is chamfered, the U-shaped clamping frame (6) is slid downward, so that the head and tail ends of the piston pin (8) are brought into contact with two grinding wheels (201), and the middle portion is brought into contact with the rubber guide wheel (203).

8. The piston pin clamping device for automatic chamfering of a piston pin according to claim 6, characterized in that: An inclined discharge pipe (5) is arranged in an adjacent space on one side of the mounting frame (2), and a support tray (501) is welded to the top opening of the inclined discharge pipe (5) and is supported by the hexagonal vertical support rod (101). When the U-shaped clamping frame (6) slides upward and abuts against the L-shaped blocking rod (102), the positioning ring (610) is aligned at the same height as the top opening of the inclined discharge pipe (5).

9. The piston pin clamping device for automatic chamfering of a piston pin according to claim 1, characterized in that: A rectangular slide groove is penetrated through the head end portion of the convex drive plate (607), and when the vertical support slide bar (7) and the convex drive plate (607) slide towards each other, the upper half of the vertical support slide bar (7) slides through the rectangular slide groove.

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