Reciprocating mechanism capable of adjusting coordinates and balance of stroke of eccentric crank

Abstract

The utility model discloses an eccentric crank stroke coordinate and balance adjustable reciprocating mechanism, which comprises a base, a driving mechanism, a transmission mechanism and a mounting mechanism, the transmission mechanism comprises an eccentric wheel and a crank shaft, the eccentric position of the crank shaft is provided with a connecting shaft, and the crank shaft is movably mounted in the eccentric wheel and can rotate; an adjusting assembly is arranged in the eccentric wheel and is in butt joint with the crankshaft. The connecting shaft is connected with a connecting rod, the connecting rod is connected with a sliding plate, and the sliding plate is slidably erected on the base; the mounting mechanism is mounted on the sliding plate, and the sliding plate is connected with a position adjusting mechanism and a balance adjusting mechanism. Therefore, the coordinate of the tool can be conveniently adjusted, and the gravity of the part is overcome to achieve better balance. The stroke of the reciprocating mechanism can be adjusted, the coordinate position of the stroke can be adjusted, high-precision grinding machining of different strokes and different positions is achieved, parts with different blade lengths are machined, the stable balanced reciprocating stroke is provided, vibration is reduced, and machining precision and lines are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of industrial auxiliary production equipment technology, and in particular to a reciprocating mechanism for an optical projection profile grinding machine. Background Technology

[0002] In the field of optical device manufacturing, reciprocating mechanisms are frequently used to achieve precise adjustments to machining tools or workpieces. Currently, reciprocating motion during machining typically employs a lead screw that rotates forward and backward, with the lead screw nut fixed to a slide. A forward rotation of the lead screw causes the slide to move linearly in one direction, while a reverse rotation causes it to move linearly in the opposite direction. Alternatively, a hydraulic cylinder can be used to drive a push rod for reciprocating motion. However, in vertical reciprocating mechanisms, both of these methods are affected by the weight of the slide, leading to vibration and slow speed during precision grinding. In particular, the forward and reverse rotation of the lead screw is prone to wear and loosening due to gravity, affecting machining quality. To address the reciprocating motion of the vertical slide, it is necessary to adjust the reciprocating stroke length and coordinate position, while also requiring high stability and balance. Existing reciprocating mechanisms struggle to simultaneously meet all these functional requirements. Utility Model Content

[0003] This utility model addresses the shortcomings of existing technologies by providing a reciprocating mechanism with adjustable coordinates and balance of an eccentric crank stroke, featuring a more rational structural design, convenient adjustment of coordinates, balance, and range of motion, reduced vibration during processing, and improved processing accuracy.

[0004] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a reciprocating mechanism with adjustable coordinates and balance of eccentric crank stroke, including a base, a drive mechanism, a transmission mechanism, and a mounting mechanism. The mounting mechanism is connected to the transmission mechanism and is used to mount processing tools. The transmission mechanism is mounted on the base and connected to the drive mechanism, and the drive mechanism is mounted on the base. The transmission mechanism includes an eccentric wheel and a crankshaft. A connecting shaft is provided at the eccentric position of the crankshaft. The crankshaft is movably mounted in the eccentric wheel to form a structure that can rotate in the eccentric wheel. An adjustment component is provided in the eccentric wheel. The adjustment component is connected to the crankshaft to drive the crankshaft to rotate and adjust the position of the connecting shaft. The connecting shaft is connected to a connecting rod, and the connecting rod is connected to a sliding plate. The sliding plate is slidably mounted on the base. The crankshaft drives the connecting rod to swing as the eccentric wheel rotates, thereby pushing the sliding plate to move linearly along the base. The mounting mechanism is mounted on the sliding plate, and the sliding plate is connected to a position adjustment mechanism and a balance adjustment mechanism.

[0005] Furthermore, the adjusting assembly includes a worm gear and a worm. A mounting groove is provided at the eccentric position of the eccentric wheel, and the crankshaft is installed in the mounting groove. A worm gear hole is provided in the mounting groove, and the worm gear is installed in the worm gear hole. The crankshaft is connected to the worm gear, and the worm gear is connected to the drive mechanism. A worm hole is provided on the circumferential side wall of the eccentric wheel, and the worm is installed in the worm hole and extends into the worm gear hole to mesh with the worm gear. The tail end of the worm protrudes from the worm hole to form an adjustable structure.

[0006] Furthermore, a top ball is installed on the other side of the circumferential sidewall of the eccentric wheel to cooperate with the top nut as a clamping element, with the top ball abutting against the head end of the worm.

[0007] Furthermore, the connecting rod is connected to an adjusting bracket, the extension direction of which is the same as the sliding direction of the sliding plate; an adjusting groove is provided in the adjusting bracket, and a pressure strip is provided in the adjusting groove; the sliding plate is locked and fixed to the adjusting bracket by bolts passing through the pressure strip.

[0008] Furthermore, the position adjustment mechanism includes a lead screw with a nut connected and fixed to an adjustment bracket; a first bevel tooth is fixed to the lead screw, which meshes with a second bevel tooth, and the second bevel tooth is connected to an adjustment shaft extending out of the sliding plate; the balance adjustment mechanism includes a balance cylinder mounted on the back of the sliding plate, and the cylinder rod of the balance cylinder is connected to the base to form a structure that balances the gravity of the sliding plate, with the cylinder rod arranged parallel to the lead screw.

[0009] Furthermore, a shaft is installed in the base, and a worm gear is connected to the shaft; the drive mechanism includes a motor, a drive wheel is connected to the motor, a driven wheel is connected to the drive wheel via a belt, and the driven wheel is connected to the shaft; a motor base is installed on the back of the base, and an adjusting plate is installed on the motor base by fixing screws, and the motor is mounted on the adjusting plate; the adjusting plate is provided with a strip hole, and the fixing screw passes through the strip hole to fix it to the motor base; an adjusting screw is provided on the side of the adjusting plate, and the adjusting screw abuts against the fixing screw to form a structure that pushes the fixing screw to move laterally.

[0010] Furthermore, a slide rail is provided on the front of the base, and the sliding plate is mounted on the slide rail by a slider; two limit switches are provided on the side of the base near the slide rail, and a limit stop is provided on the side of the sliding plate, with the limit stop located between the two limit switches to form the linear movement range of the sliding plate.

[0011] Furthermore, a fixing plate is installed on the front of the sliding plate, and a pivot pin is provided on the fixing plate. The machining tool is connected to the pivot pin to form a structure that can rotate along the pivot pin. A fixing block is installed on the fixing plate and is located below the machining tool. An adjusting screw is provided in the fixing block and abuts against the machining tool to form a fine-tuning structure for the machining tool.

[0012] Furthermore, a partition is provided between the sliding plate and the fixed plate to separate the two, and the partition covers the sliding plate to prevent dust. The partition is provided with a clearance hole and an arc-shaped hole. A locking screw and a fastening screw are used to lock the partition and fix it so that the clearance hole is aligned with the adjusting shaft and the bolts fixing the sliding plate.

[0013] Furthermore, a window is provided on one side of the base, opposite to the circumferential sidewall of the eccentric wheel; the tail end of the worm gear is provided with a hexagonal hole that can be rotated by a hexagonal wrench; a side cover is provided on the side of the base, with an opening on the side cover aligned with the window, and a movable cover that can be opened and closed is provided at the opening; slide rail covers are provided on both sides of the slide rail, which block the slide rail and the slider to prevent dust.

[0014] This invention utilizes a crankshaft in conjunction with an eccentric wheel to allow the machining tool to move within the diameter range of the eccentric wheel. It also incorporates adjustment components, coordinate adjustment mechanisms, and balance adjustment mechanisms, enabling convenient adjustment of the tool's coordinates and overcoming the weight of the workpiece to achieve better balance. This allows for adjustment of both the stroke of the reciprocating mechanism and the coordinate position of that stroke, enabling high-precision grinding at different stroke positions, machining parts with varying cutting lengths, providing a stable and balanced reciprocating stroke, reducing vibration, and ensuring machining accuracy and texture. Attached Figure Description

[0015] Figure 1 This is a structural diagram of the present utility model;

[0016] Figure 2 This is a front view of the present invention.

[0017] Figure 3 This is a side view of the present invention.

[0018] Figure 4 This is an exploded structural diagram of the present invention;

[0019] Figure 5 This is an exploded structural diagram of the present invention from another angle;

[0020] Figure 6 This is a structural diagram of the main body of this utility model;

[0021] Figure 7 This is an exploded structural diagram of the main body of this utility model;

[0022] Figure 8 This is an exploded structural diagram of the drive mechanism and base of this utility model;

[0023] Figure 9 This is an exploded structural diagram of the worm gear system of this utility model;

[0024] Figure 10 This is an exploded view of the sliding plate and lifting mechanism of this utility model.

[0025] In the diagram, 1 is the base, 11 is the shaft, 12 is the slide rail, 13 is the slider, 14 and 15 are limit switches, 16 is the window, 21 is the motor, 22 is the driving wheel, 23 is the driven wheel, 24 is the belt, 25 is the motor mount, 26 is the adjusting plate, 27 is the fixing screw, 28 is the adjusting screw, 31 is the eccentric wheel, 311 is the mounting slot, 312 is the worm gear hole, 32 is the worm gear, 33 is the worm, 34 is the crankshaft, 341 is the connecting shaft, 35 is the connecting rod, 36 is the adjusting bracket, 37 is the top ball, and 38 is the tightening nut. 4 is a sliding plate, 41 is a balance cylinder, 42 is a cylinder rod, 43 is a pressure bar, 44 is a stroke block, 45 is a bolt, 51 is a lead screw, 52 is a lead nut, 53 is the first bevel gear, 54 is the second bevel gear, 55 is an adjusting shaft, 6 is a grinding head, 61 is a grinding wheel, 62 is a support foot, 63 is a fixing block, 64 is an adjusting screw, 7 is a partition plate, 71 is a clearance hole, 72 is an arc-shaped hole, 73 is a locking screw, 74 is a locking screw, 8 is a fixing plate, 81 is a shaft pin, 91 is a side cover, 92 is a slide rail cover, and 10 is a movable cover. Detailed Implementation

[0026] In this embodiment, refer to Figures 1-10 The reciprocating mechanism with adjustable coordinates and balance of the eccentric crank stroke includes a base 1, a drive mechanism, a transmission mechanism, and a mounting mechanism. The mounting mechanism is connected to the transmission mechanism and is used to mount the machining tool (in this embodiment, the machining tool is a grinding head 6 with a grinding wheel 61 as an example). The transmission mechanism is mounted on the base 1 and connected to the drive mechanism. The drive mechanism is mounted on the base 1. The transmission mechanism includes an eccentric wheel 31 and a crankshaft 34. A connecting shaft 341 is provided at the eccentric position of the crankshaft 34. The crankshaft 34 is movably mounted in the eccentric wheel 31 to form a mechanism that can be eccentrically mounted. The eccentric wheel 31 has a rotating structure; an adjustment component is provided in the eccentric wheel 31, which is connected to the crankshaft 34 to drive the crankshaft 34 to rotate and adjust the position of the connecting shaft 341; the connecting shaft 341 is connected to a connecting rod 35, and the connecting rod 35 is connected to a sliding plate 4. The sliding plate 4 is slidably mounted on the base 1. The crankshaft 34 drives the connecting rod 35 to reciprocate as the eccentric wheel 31 rotates, thereby pushing the sliding plate 4 to move linearly along the base 1; the mounting mechanism is installed on the sliding plate 4, and the sliding plate 4 is connected to a position adjustment mechanism and a balance adjustment mechanism.

[0027] Reference Figure 7 and Figure 9The adjusting assembly includes a worm gear 32 and a worm 33. A mounting groove 311 is provided at the eccentric position of the eccentric wheel 31, and the crankshaft 34 is installed in the mounting groove 311. A worm gear hole 312 is provided within the mounting groove 311, and the worm gear 32 is installed in the worm gear hole 312. The crankshaft 34 is connected to the worm gear 32, and the worm gear 32 is connected to the drive mechanism. A worm hole (not shown) is provided on the circumferential side wall of the eccentric wheel 31. The worm 33 is installed in the worm hole and extends into the worm gear hole 312 to mesh with the worm gear 32. The tail end of the worm 33 protrudes from the worm hole, allowing for external adjustment. Manually rotating the worm 33 converts it into the circular motion of the worm gear 32, thereby rotating the crankshaft 34 and placing the connecting shaft in different positions.

[0028] A top ball 37 is installed on the other side of the circumferential sidewall of the eccentric wheel 31, which works in conjunction with the tightening nut 38 as a clamping element. The top ball 37 abuts against the head end of the worm 33. This allows the worm 33 to rotate while preventing it from moving up and down, thus interlocking with the worm wheel 32.

[0029] Figure 5 , Figure 7 and Figure 10 A connecting rod 35 is connected to an adjusting bracket 36, the extending direction of which is the same as the sliding direction of the sliding plate 4. An adjusting groove is provided in the adjusting bracket 36, and a pressure strip 43 with a T-shaped cross-section is provided within the adjusting groove. The sliding plate 4 is locked to the adjusting bracket 36 by bolts 45 passing through the pressure strip 43. After loosening the bolts 45, the position of the pressure strip 43 can be moved up and down to adjust the position of the sliding plate 4, thus achieving coordinate adjustment.

[0030] The position adjustment mechanism includes a lead screw 51, a lead screw nut 52 mounted on the lead screw 51, and the lead screw nut 52 being connected and fixed to the adjustment bracket 36. A first bevel gear 53 is fixed on the lead screw 51, and the first bevel gear 53 meshes with a second bevel gear 54. The second bevel gear 54 is connected to an adjustment shaft 55, which extends out of the sliding plate 4. Rotating the adjustment shaft 55 from the outside drives the second bevel gear 54, thereby actuating the first bevel gear 53 and the lead screw 51, causing the lead screw 51 to rotate relative to the lead screw nut 52, thereby driving the sliding plate 4 to perform linear motion, thus achieving fine adjustment (precise adjustment) of the coordinate position.

[0031] The balancing mechanism includes a balancing cylinder 41, which is mounted on the back of the sliding plate 4. The cylinder rod 42 of the balancing cylinder 41 is connected to the base 1 to form a structure that balances the gravity of the sliding plate 4. The cylinder rod 42 is parallel to the lead screw 41. Because the mechanical components such as the sliding plate 4, grinding head 6, and grinding wheel 61 exert downward gravity on the base 1, an unbalanced force is generated during the reciprocating motion of the mechanism. The balancing cylinder 41 uses a unilateral air supply method, providing a downward thrust to the cylinder rod 42, which in turn generates an upward thrust. This upward thrust cancels out the downward gravity of the sliding plate 4, thereby improving the balance and stability of the mechanism during operation and reducing vibration.

[0032] Reference Figure 8 A shaft core 11 is installed in the base 1, and a worm gear 32 is connected to the shaft core 11. The drive mechanism includes a motor 21, which is connected to a drive wheel 22. The drive wheel 22 is connected to a driven wheel 23 via a belt 24, and the driven wheel 23 is connected to the shaft core 11. A motor base 25 is installed on the back of the base 1. An adjusting plate 26 is installed on the motor base 25 by fixing screws 27, and the motor 21 is installed on the adjusting plate 26. The adjusting plate 26 has a strip hole, through which the fixing screws 27 pass and are fixed to the motor base 25. An adjusting screw 28 is provided on the side of the adjusting plate 26, which abuts against the fixing screws 27. By rotating the adjusting screw 28, the adjusting plate 26 can be pushed to move laterally, thereby changing the distance between the drive wheel 22 and the driven wheel 23, thus adjusting the tension of the belt 24.

[0033] A slide rail 12 is provided on the front of the base 1, and the sliding plate 4 is mounted on the slide rail 12 via a slider 13. Two limit switches 14 and 15 are provided on the side of the base 1 near the slide rail 12, and a limit stop block 44 is provided on the side of the sliding plate 4. The limit stop block 44 is located between the two limit switches 14 and 15 to form the linear movement range of the sliding plate 4. When the travel of the sliding plate 4 exceeds the limit of the limit switches 14 and 15, the limit stop block 44 will press against the limit switch 14 or the limit switch 15, and the system will control the motor 21 to stop working to avoid collision.

[0034] A fixing plate 8 is mounted on the front of the sliding plate 4. A pivot pin 81 is mounted on the fixing plate 8, and the grinding head 6 is connected to the pivot pin 81 to form a structure that can rotate along the pivot pin 81. A fixing block 63 is mounted on the fixing plate 8, located below the grinding head 6. An adjusting screw 64 is located in the fixing block 63, and the adjusting screw 64 abuts against the support leg 62 of the grinding head 6. The levelness of the grinding head 6 affects the perpendicularity of the grinding wheel 61, thus affecting the grinding accuracy of the grinding wheel 61. To eliminate this effect, the adjusting screw 64 can be tightened with a hex wrench. The adjusting screw 64 pushes the grinding head 6 to rotate, achieving a suitable levelness, thereby adjusting the perpendicularity of the grinding wheel 61 to meet the vertical requirements of the machining. Additionally, the grinding wheel 61 can be mounted on the grinding head 6 via a flange, allowing for the machining of different molds, cutters, rollers, hardware parts, etc.

[0035] Reference Figure 1 , Figure 2 , Figure 3 and Figure 10 A partition 7 is installed between the sliding plate 4 and the fixed plate 8 to separate them and cover the sliding plate 4 for dust prevention. The partition 7 has a clearance hole 71 and an arc-shaped hole 72. A locking screw 73 and a locking screw 74 are used to lock and fix the partition 7, and the clearance hole 71 is aligned with the adjusting shaft 55 and the bolt 45 that fixes the sliding plate 4. The slide plate can rotate a certain angle, and the rotation range is the opening range of the arc-shaped hole 72. When the slide plate 7 rotates to the point where its clearance hole 71 is aligned with the adjusting shaft 55 and the screw 45, a hex wrench can be used to loosen the screw 45 first through the clearance hole 71, and then the adjusting shaft 55 can be rotated to adjust the position of the sliding plate 4. After adjustment, the bolt is tightened to lock the sliding plate 4 to the adjusting bracket 36. Then the partition 8 is rotated to close the clearance hole and the locking screws 73 and 74 are tightened to prevent dust.

[0036] A window 16 is provided on one side of the base 1, opposite to the circumferential sidewall of the eccentric wheel 31; the tail end of the worm gear 33 is provided with a hexagonal hole that can be rotated by a hexagonal wrench; a side cover 91 is provided on the side of the base 1, with an opening on the side cover 91 aligned with the window 16, and a movable cover 10 that can be opened and closed at the opening; when adjusting the eccentric wheel 31, the movable cover 10 is opened to expose the window 16. After adjusting the eccentric wheel 31, the movable cover 10 is closed to close the window 16, serving as a dustproof function. Slide rail covers 92 are provided on both sides of the slide rail 12, which cover the slide rail 12 and the slider 13, serving as a dustproof function.

[0037] Rotating the worm gear 33 adjusts the circumferential position of the worm wheel 32 and the crankshaft 34. When the connecting shaft 341 of the crankshaft 34 coincides with the central axis of the eccentric wheel 31, the motor 21 drives the eccentric wheel 31 and the crankshaft 34 to perform circular motion. Since the connecting shaft 341 of the crankshaft 34 is located at the center of the eccentric wheel 31, it rotates around the center, causing the crankshaft 34 to perform circular motion with the eccentric wheel 31. The connecting rod 36 does not perform reciprocating oscillation motion, and the sliding plate 4 does not perform linear reciprocating motion.

[0038] Rotating the worm gear 33 adjusts the circumferential position of the worm wheel 32 and the crankshaft 34. When the connecting shaft 341 of the crankshaft 34 is at its maximum distance from the center of the eccentric wheel 31, the motor 21 drives the crankshaft 34 to perform circular motion. Since the connecting shaft 341 of the crankshaft 34 is located on the outermost circle of the eccentric wheel 31, it rotates in a circle with the center of the eccentric wheel 31 as the center and the distance between the connecting shaft 341 and the center of the eccentric wheel 31 as the radius, achieving the maximum range of oscillation motion of the connecting rod 36. One revolution of the crankshaft 34 corresponds to one oscillation of the connecting rod 36. The continuous rotation of the crankshaft 34 achieves the linear reciprocating motion of the sliding plate 4. The distance of this linear reciprocating motion is equal to the diameter of the circle formed by the connecting shaft 34 of the crankshaft 34 as it rotates with the eccentric wheel 31, i.e., D = 2πR.

[0039] By adjusting the worm gear 33, the connecting shaft 341 of the crankshaft 34 can be positioned around the circumference of the eccentric wheel 31. The closer the crankshaft 341 is to the center of the eccentric wheel 31, the smaller the radius of its circular motion, which translates to a shorter linear reciprocating motion distance for the sliding plate 4. Conversely, the greater the distance between the crankshaft 34 and the center of the eccentric wheel 31, the larger the radius of its circular motion, which translates to a longer linear reciprocating motion distance for the sliding plate 4. The stroke of the crankshaft 34 can be observed by comparing the scale indication on the eccentric wheel 31 with the position indicated by the scale on the crankshaft 34, thus achieving adjustable stroke.

[0040] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. A reciprocating mechanism with adjustable coordinates and balance of eccentric crank stroke, comprising a base, a drive mechanism, a transmission mechanism, and a mounting mechanism, wherein the mounting mechanism is connected to the transmission mechanism and is used to mount machining tools, the transmission mechanism is mounted on the base and connected to the drive mechanism, and the drive mechanism is mounted on the base, characterized in that: The transmission mechanism comprises an eccentric wheel and a crank shaft, an eccentric position of the crank shaft is provided with a connecting shaft, the crank shaft is movably installed in the eccentric wheel to form a structure capable of rotating in the eccentric wheel; an adjusting assembly is arranged in the eccentric wheel, the adjusting assembly is butted against the crank shaft to realize driving the crank shaft to rotate and adjusting the position of the connecting shaft; the connecting shaft is connected with a connecting rod, the connecting rod is connected with a sliding plate, the sliding plate is slidably arranged on a base, the crank shaft drives the connecting rod to swing to push the sliding plate to move linearly along the base by rotating with the eccentric wheel; a mounting mechanism is mounted on the sliding plate, the sliding plate is connected with a position adjusting mechanism and a balance adjusting mechanism.

2. The adjustable throw eccentric crank coordinate and counterbalanced reciprocating mechanism of claim 1, wherein: The adjusting assembly comprises a worm wheel and a worm, an installation groove is arranged at the eccentric position of the eccentric wheel, the crank shaft is installed in the installation groove; a worm wheel hole is arranged in the installation groove, the worm wheel is installed in the worm wheel hole, the crank shaft is connected with the worm wheel, the worm wheel is connected with a driving mechanism; a worm hole is arranged on the circumferential side wall of the eccentric wheel, the worm is arranged in the worm hole and extends into the worm wheel hole to mesh with the worm wheel, a tail end of the worm is exposed in the worm hole to form an adjustable structure.

3. The adjustable throw eccentric crank coordinate and counterbalanced reciprocating mechanism of claim 2, wherein: A top bead is arranged on the other side of the circumferential side wall of the eccentric wheel to cooperate with a jam nut as a resisting piece, the top bead abuts against the head end of the worm.

4. The adjustable throw eccentric crank coordinate and counterbalanced reciprocating mechanism of claim 1, wherein: The connecting rod is connected with an adjusting bracket, the extending direction of the adjusting bracket is the same as the sliding direction of the sliding plate; an adjusting groove is arranged in the adjusting bracket, a pressing strip is arranged in the adjusting groove, the sliding plate is locked and fixed with the adjusting bracket through the pressing strip by bolts.

5. The adjustable throw eccentric crank coordinate and counterbalanced reciprocating mechanism of claim 4, wherein: The position adjusting mechanism comprises a lead screw, a nut is arranged on the lead screw, the nut is fixedly connected with the adjusting bracket; a first bevel gear is fixed on the lead screw, the first bevel gear meshes with a second bevel gear, the second bevel gear is connected with an adjusting shaft, the adjusting shaft extends into the sliding plate; the balance adjusting mechanism comprises a balance cylinder, the balance cylinder is mounted on the back of the sliding plate, a cylinder rod of the balance cylinder is connected with the base to form a structure balancing the gravity of the sliding plate, the cylinder rod is arranged in parallel with the lead screw.

6. The adjustable throw eccentric crank coordinate and counterbalanced reciprocating mechanism of claim 2, wherein: A shaft core is mounted in the base, the worm wheel is connected with the shaft core; the driving mechanism comprises a motor, the motor is connected with a driving wheel, the driving wheel is connected with a driven wheel through a belt, the driven wheel is connected with the shaft core; a motor base is mounted on the back of the base, an adjusting plate is mounted on the motor base through fixing screws, the motor is mounted on the adjusting plate; a strip-shaped hole is arranged on the adjusting plate, the fixing screws pass through the strip-shaped hole and are fixed with the motor base, adjusting screws are arranged on the side surface of the adjusting plate, the adjusting screws abut against the fixing screws to form a structure pushing the fixing screws to move horizontally.

7. The adjustable throw eccentric crank coordinate and counterbalanced reciprocating mechanism of claim 2, wherein: A slide rail is arranged on the front surface of the base, the sliding plate is arranged on the slide rail through a sliding block; two travel switches are arranged on the side surface of the base close to the slide rail, travel bumpers are arranged on the side surface of the sliding plate, the travel bumpers are located between the two travel switches to form a linear motion range of the sliding plate.

8. The adjustable throw eccentric crank coordinate and counterbalanced reciprocating mechanism of claim 5, wherein: A fixed plate is mounted on the front surface of the sliding plate, a shaft pin is arranged on the fixed plate, a processing tool is connected with the shaft pin to form a structure capable of rotating along the shaft pin; a fixed block is mounted on the fixed plate, the fixed block is located below the processing tool; an adjusting screw is arranged in the fixed block, the adjusting screw abuts against the processing tool to form a fine adjustment structure of the processing tool.

9. The adjustable throw eccentric crank coordinate and counterbalanced reciprocating mechanism of claim 8, wherein: A partition is arranged between the sliding plate and the fixed plate to separate them and cover the sliding plate, the partition is provided with an avoiding hole and an arc-shaped hole, and the partition is locked and fixed by a locking screw and a locking bolt to make the avoiding hole opposite to the adjusting shaft and the bolt for fixing the sliding plate.

10. The adjustable throw eccentric crank coordinate and counterbalanced reciprocating mechanism of claim 7, wherein: A window is arranged on one side of the base and opposite to the circumferential side wall of the eccentric wheel; the tail end of the worm is provided with a hexagonal hole which can be rotated by a hexagonal wrench; a side cover is arranged on the side of the base, the side cover is provided with an opening which is aligned with the window, and a movable cover which can be opened and closed is arranged at the opening; slide rail covers are arranged on both sides of the slide rail to block the slide rail and the slide block.

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