Adjustable spacing slide device for four-point long-stroke multi-link press

Abstract

The present application relates to the technical field of press machine, and discloses an adjustable interval type slider device for four-point large-stroke multi-link press machine, which comprises a multi-link press machine main machine, an upper frame, four vertical columns fixed at the bottom of the upper frame, and a slider, wherein the slider is a double-layer structure composed of a top frame and a bottom plate, the double-layer slider quickly forms an installation position matched with the height of a mold by adjusting the interval between the top frame and the bottom plate, the soft adaptation of the height of the mold is realized, the time for mold changing and debugging is shortened, the adjusting mechanism is provided with two groups and symmetrically installed in the top frame, the interval between the top frame and the bottom plate can be quickly adjusted, and the interval between the top frame and the bottom plate can be further secondarily finely adjusted by adjusting the height of the fulcrum. The present application innovatively designs the traditional slider into a double-layer structure with adjustable interval, realizes the soft adaptation of the height of the mold, shortens the time for mold changing and debugging, and adjusts the stability and supportability of the slider movement, thereby improving the stability of the slider movement.

Description

Technical Field

[0001] This invention relates to the field of press technology, specifically to an adjustable-pitch slide block device for a four-point large-stroke multi-link press. Background Technology

[0002] Mechanical presses, as core equipment in stamping production, are widely used in the automotive, home appliance, and aerospace manufacturing industries. With increasing market competition and accelerated product upgrades, the manufacturing industry is placing increasingly higher demands on the flexibility of production lines, requiring individual machines or production lines to quickly and economically adapt to multi-variety, small-batch production tasks. In current technology, the slide of a mechanical press is typically a rigid, integral structure with a T-slot on its lower surface for mold mounting. This traditional structure has inherent drawbacks: poor mold height adaptability and long mold changeover times. When the production line needs to switch to molds with different closing heights, operators must spend considerable time manually adjusting the slide's mold mounting height to accommodate the new mold. Therefore, due to the fixed structure of the traditional slide, its process tasks are singular and cannot be dynamically adjusted. When the production process of a certain part changes, it can easily cause some equipment in the entire production line to become bottlenecks, while other equipment suffers from insufficient utilization, hindering further improvements in overall line efficiency.

[0003] Therefore, there is an urgent need in this field for a technological innovation to solve the problems of poor flexibility, low mold changing efficiency, severe wear between the slider and the guide rail, large assembly gap, and the impact on the stability of slider movement caused by the fixed structure and single function of the slider in traditional mechanical presses. Summary of the Invention

[0004] Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides an adjustable spacing slider device for a four-point long-stroke multi-link press. This solves the problems in existing technologies, such as the fixed structure of the slider, its inability to quickly adapt to molds of different heights, severe wear between the slider and the guide rail, large assembly gaps, and the impact on the stability of slider movement.

[0006] Technical solution To achieve the above objectives, the present invention provides the following technical solution: an adjustable-pitch slider device for a four-point large-stroke multi-link press, comprising a multi-link press main unit, an upper frame, and four columns fixed to the bottom of the upper frame, and further comprising: The slider is a double-layer structure consisting of a top frame and a bottom plate. By adjusting the distance between the top frame and the bottom plate, the double-layer slider can quickly form an installation position that matches the height of the mold, thus achieving soft adaptation of the mold height and shortening the time for mold changing and debugging. The adjustment mechanism is provided in two sets and symmetrically installed in the top frame. It can quickly adjust the distance between the top frame and the bottom plate. It can also make secondary fine adjustments to the distance between the top frame and the bottom plate by adjusting the height of the fulcrum. The guide rail assembly is installed at the four corners of the top frame. The gap between the guide rails can be adjusted according to the load of the press and the play between the guide rail accessories, thereby providing dynamic support for the slider and enabling the guide rail to provide stable support and guidance for the slider.

[0007] As a further description of the above technical solution, the adjusting mechanism includes two guide columns, each with a guide sleeve fitted on its sidewall. The guide sleeve is fixed inside the top frame. The lower end of each guide column passes through the guide sleeve and is fixedly connected to the upper end of the base plate. A crossbeam is fixedly connected between the two guide columns. A brake plate is fixedly connected to the sidewall of each crossbeam. A slotted hole is provided on the sidewall of each brake plate. A pin is fitted inside the slotted hole. A main shaft is rotatably connected inside the top frame via a bearing seat. An eccentric wheel is fixedly connected to the shaft wall of the main shaft. Two rocker arms are fitted on the sidewall of the eccentric wheel. A transmission rod is fixedly connected to the sidewall of each rocker arm, and a pin is fixedly connected to one side of the transmission rod. The transmission rods on both rocker arms are rotatably connected to a first hydraulic cylinder via pins. A convex ring is provided on the sidewall of the eccentric wheel, which contacts the sidewall of the rocker arm. A positioning ring is fixedly connected to the sidewall of the eccentric wheel, and the positioning ring is used to limit the rocker arm fitted on the cam.

[0008] The main shaft is equipped with a transmission mechanism for adjusting the angle of the eccentric wheel. By adjusting the rotation of the eccentric wheel through the transmission mechanism, the support height of the rocker arm is changed, thereby achieving fine adjustment of the gap between the top frame and the bottom plate. The main body of the multi-link press is equipped with multiple transmission columns, and the transmission columns are fixedly connected to the top frame.

[0009] As a further description of the above technical solution, the transmission mechanism includes a stepper motor, the output end of which is fixedly connected to a worm gear reducer, the output shaft end of which is fixedly connected to a rotating shaft, and the shaft wall of the rotating shaft is rotatably connected to the inner wall of the top frame through a bearing seat, a driving gear is fixedly connected to the shaft wall of the rotating shaft, a driven gear meshes with one side of the driving gear, and the driven gear is coaxially fixedly connected to one end of the main shaft.

[0010] As a further description of the above technical solution, the guide rail assembly includes a guide plate, a bracket fixedly connected to one side of the guide plate, the bracket being fixed at the corner of the column, mounting parts being provided at the four corners of the top frame, a frame being fixedly connected to the mounting parts, rectangular plates being slidably connected to the upper and lower ends of the frame, the mounting parts being sleeved with the side wall of the rectangular plates through rectangular holes, one end of the rectangular plates passing through the rectangular holes and fixedly connected to a back plate, a housing being fixedly connected to one side of the back plate, one side of the housing contacting the side wall of the guide plate, an adjusting cylinder being fixedly connected inside the frame, one end of the piston rod of the adjusting cylinder passing through the mounting parts and fixedly connected to one side of the back plate; The housing is equipped with an adjustable sliding assembly. The sliding assembly contacts the corner of the guide plate through a load-bearing roller. By adjusting the spacing of the sliding assembly, the load-bearing roller is made to contact the guide plate tightly, thereby changing the play between the guide rail accessories and making the support strength of the guide rail assembly adjustable. Limiting strips are fixedly connected to both the upper and lower sides of the frame. A limiting groove that cooperates with the limiting strip is opened on one side of the rectangular plate.

[0011] As a further description of the above technical solution, the sliding assembly includes two sets of movable frames, each of which has two bent arms fixedly connected to its opposite side. The sidewall of the housing is sleeved with the bent arms through a sliding sleeve. The bent arms are rotatably connected to load-bearing rollers. A second hydraulic cylinder is fixedly connected to one side of the housing, and the output end of the second hydraulic cylinder is fixedly connected to the center of the movable frame.

[0012] As a further description of the above technical solution, the guide plate is provided with an inclined surface at its corner, the angle between the inclined surface and the plane of the guide plate is 45°, and the load-bearing roller is inclined and maintains line contact with the inclined surface.

[0013] As a further description of the above technical solution, a directional part is provided at the center of one side of the housing, a directional groove is provided on the side wall of the guide plate to cooperate with the directional part, two guide strips are provided on one side of the housing, the two guide strips are symmetrically distributed on both sides of the directional part, and a guide groove is provided on the side wall of the guide plate to cooperate with the guide strips.

[0014] As a further description of the above technical solution, two brake blocks are provided inside the housing, and two hydraulic pistons are fixedly connected between the two brake blocks. A strip-shaped hole is opened on one side of the directional part, and one side of the brake block passes through the strip-shaped hole and contacts the side wall of the directional groove. Multiple guide shafts are sleeved on the opposite sides of the two brake blocks through blind holes.

[0015] As a further description of the above technical solution, friction pads are embedded on both sides of the directional groove, the brake block has an L-shaped structure, and one side of the brake block passes through the strip hole and contacts the friction pad.

[0016] As a further description of the above technical solution, the upper end of the housing is fixedly connected to an air pipe connector, the curved arm is a hollow structure, and an air inlet is provided on the side wall, so that the compressed gas entering the housing can pass through the curved arm and be discharged.

[0017] Beneficial effects Compared with the prior art, the present invention provides an adjustable-pitch slide device for a four-point long-stroke multi-link press, which has the following advantages: 1. This technical solution controls the extension and retraction of the first hydraulic cylinder, which pulls the shaft pin and transmission rod to make the rocker arm rotate on the side wall of the eccentric wheel. When the two rocker arms rotate, the distance between their top ends decreases, and the length of the rocker arms can be used to move the crossbeam upward. At this time, the guide column can be pulled to reduce the gap between the bottom plate and the top frame, and vice versa. In this way, the position of the bottom plate of the fixed mold can be quickly adjusted according to the height of the mold. In addition, by starting the stepper motor to drive the worm gear reducer to rotate the shaft, the rotation of the shaft drives the drive gear to rotate the driven gear, the rotation of the driven gear drives the main shaft to rotate, and the rotation of the main shaft drives the eccentric wheel to swing. In this way, the change of the eccentric angle can be used to change the highest point of the eccentric wheel. In this way, the support height of the rocker arm can be adjusted at a slow speed. After quickly adjusting the height, the gap between the bottom plate and the top frame can be finely adjusted again.

[0018] 2. This technical solution also incorporates guide rails at the corners of the slider. The guide rail structure adopts a four-corner, eight-sided design for stable support. Simultaneously, the guide rail assembly is installed at the four corners of the top frame, allowing adjustment of the guide rail gap according to the press load and the play between the guide rail accessories. This provides dynamic support for the slider, enabling the guide rail to provide stable support and guidance. Furthermore, the guide rail structure also has a braking function, maintaining sealing during mold closing and ensuring constant pressure on the slider. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the adjustable-pitch slider device for a four-point long-stroke multi-link press proposed in this invention. Figure 2 This is a schematic diagram of the adjusting mechanism in the top frame of the adjustable-gap slider device for a four-point large-stroke multi-link press proposed in this invention. Figure 3 This is a schematic diagram of the adjusting mechanism and transmission mechanism in the adjustable-pitch slider device for a four-point long-stroke multi-link press proposed in this invention. Figure 1 ; Figure 4 This is a schematic diagram of the adjusting mechanism and transmission mechanism in the adjustable-pitch slider device for a four-point long-stroke multi-link press proposed in this invention. Figure 2 ; Figure 5 This is a left view of the adjusting mechanism in the adjustable spacing slider device for a four-point large stroke multi-link press proposed in this invention. Figure 6 This is a schematic diagram of the structure of the adjustable-pitch slider device for a four-point large-stroke multi-link press proposed in this invention, including the housing, back plate, load-bearing rollers, and rectangular plate. Figure 7 This is a schematic diagram of the adjustable spacing slider device for a four-point large stroke multi-link press proposed in this invention, showing the structure of the adjusting cylinder, rectangular plate, and frame. Figure 8 This is a schematic diagram of the guide rail assembly in the adjustable-pitch slider device for a four-point long-stroke multi-link press proposed in this invention. Figure 9 This is a schematic diagram of the structure of the housing, brake block, and hydraulic piston in the adjustable-pitch slider device for a four-point long-stroke multi-link press proposed in this invention. Figure 10 This is a schematic diagram of the bent arm and load-bearing roller in the adjustable-pitch slider device for a four-point large-stroke multi-link press proposed in this invention.

[0020] In the diagram: 1. Multi-link press main unit; 2. Upper frame; 3. Column; 4. Bracket; 5. Housing; 6. Load-bearing rollers; 7. Top frame; 8. Base plate; 9. Guide plate; 10. Transmission column; 11. Crossbeam; 12. Stepper motor; 13. Guide column; 14. Guide sleeve; 15. Rectangular plate; 16. Frame; 17. Brake plate; 18. Transmission rod; 19. Eccentric wheel; 20. Rocker arm; 21. Main shaft; 2. Driven gear; 23. Worm gear reducer; 24. Adjusting cylinder; 25. Cam; 26. Positioning ring; 27. Shaft pin; 28. First hydraulic cylinder; 29. ​​Drive gear; 30. Pin; 31. Orientation part; 32. Guide bar; 33. Bent arm; 34. Limit bar; 35. Inclined surface; 36. Second hydraulic cylinder; 37. Moving frame; 38. Brake block; 39. Hydraulic piston; 40. Guide shaft. Detailed Implementation

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

[0022] Example: See attached document Figure 1-10An adjustable spacing slider device for a four-point large stroke multi-link press includes a multi-link press main body 1, an upper frame 2, and four columns 3 fixed to the bottom of the upper frame 2. This technical solution redesigns the slider of the traditional fixed upper mold, adopting a double-layer structure composed of a top frame 7 and a bottom plate 8. By adjusting the distance between the top frame 7 and the bottom plate 8, the double-layer slider can quickly form an installation position that matches the height of the mold, realizing soft adaptation of the mold height and shortening the mold change and debugging time. Specifically, an adjustment mechanism is employed. Two sets of adjustment mechanisms are symmetrically installed within the top frame 7, enabling rapid adjustment of the distance between the top frame 7 and the base plate 8. Furthermore, the distance can be fine-tuned by adjusting the height of the fulcrum. The adjustment mechanism includes two guide posts 13, each with a guide sleeve 14 fitted onto its sidewall. The guide sleeves 14 are fixed within the top frame 7. The lower ends of the guide posts 13 pass through the guide sleeves 14 and are fixedly connected to the upper ends of the base plate 8. A crossbeam 11 is fixedly connected between the two guide posts 13. Brake plates 17 are fixedly connected to the sidewalls of the crossbeam 11, and each brake plate 17 has a slotted hole on its sidewall. A pin 27 is fitted inside the strip-shaped hole. A main shaft 21 is rotatably connected inside the top frame 7 via a bearing seat. An eccentric wheel 19 is fixedly connected to the shaft wall of the main shaft 21. Two rocker arms 20 are fitted to the side wall of the eccentric wheel 19. A transmission rod 18 is fixedly connected to the side wall of the rocker arm 20, and a pin 30 is fixedly connected to one side of the transmission rod 18. The transmission rods 18 on the two rocker arms 20 are rotatably connected to the first hydraulic cylinder 28 via the pin 30. A convex ring is provided on the side wall of the eccentric wheel 19. The convex ring contacts the side wall of the rocker arm 20. A positioning ring 26 is fixedly connected to the side wall of the eccentric wheel 19. The positioning ring 26 is used to limit the rocker arm 20 fitted on the cam 25.

[0023] A transmission mechanism for adjusting the angle of the eccentric wheel 19 is installed on the shaft wall of the main shaft 21. The transmission mechanism includes a stepper motor 12. The output end of the stepper motor 12 is fixedly connected to a worm gear reducer 23. The output shaft end of the worm gear reducer 23 is fixedly connected to a rotating shaft. The shaft wall of the rotating shaft is rotatably connected to the inner wall of the top frame 7 through a bearing seat. A drive gear 29 is fixedly connected to the shaft wall of the rotating shaft. A driven gear 22 meshes with one side of the drive gear 29. The driven gear 22 is coaxially fixedly connected to one end of the main shaft 21. The main body 1 of the multi-link press is provided with multiple transmission columns 10, and the transmission columns 10 are fixedly connected to the top frame 7. This technical solution uses an adjustment mechanism driven by a first hydraulic cylinder 28 and a transmission mechanism driven by a stepper motor to adjust the rotation of the eccentric wheel 19 through the transmission mechanism to change the support height of the rocker arm 20, thereby achieving fine adjustment of the gap between the top frame 7 and the bottom plate 8, as well as rapid adjustment of the gap between the top frame 7 and the bottom plate 8 through the first hydraulic cylinder 28. like Figures 2-4As shown, when the first hydraulic cylinder 28 extends or retracts, it can pull the shaft pin 30 and the transmission rod 18 to make the rocker arm 20 rotate on the side wall of the eccentric wheel 19. When the two rocker arms 20 rotate, the distance between their top ends decreases. The length of the rocker arm 20 can be used to move the crossbeam 17 upward. At this time, the guide column 13 can be pulled to reduce the gap between the bottom plate 8 and the top frame 7. Conversely, it will increase the gap between the two. In this way, the position of the bottom plate 8 of the fixed mold can be quickly adjusted according to the height of the mold. In addition, by starting the stepper motor 12, the worm gear reducer 23 is driven to rotate the shaft. When the shaft rotates, it drives the drive gear 29 to rotate the driven gear 22. When the driven gear 22 rotates, it drives the main shaft 21 to rotate. When the main shaft 21 rotates, it drives the eccentric wheel 19 to swing. Then, the change of the eccentric angle can be used to change the highest point of the eccentric wheel 19. In this way, the support height of the rocker arm 20 can be adjusted at a slow speed. After quickly adjusting the height, the gap between the bottom plate 8 and the top frame 7 can be finely adjusted again.

[0024] This technical solution also incorporates guide rails at the corners of the slider. The guide rail structure uses an octagonal design for stable support. Simultaneously, the guide rail assemblies are installed at the four corners of the top frame 7. The clearance of the guide rails can be adjusted according to the load of the press and the play between the guide rail accessories, thereby providing dynamic support for the slider. This allows the guide rails to provide stable support and guidance for the slider. The specific technical solution is as follows: like Figure 2 and Figures 6-10 As shown, the guide rail assembly includes a guide plate 9, a bracket 4 is fixedly connected to one side of the guide plate 9, the bracket 4 is fixed at the corner of the column 3, and mounting parts are provided at the four corners of the top frame 7. A frame 16 is fixedly connected to the mounting parts, and rectangular plates 15 are slidably connected to the upper and lower ends of the frame 16. The mounting parts are sleeved with the side wall of the rectangular plate 15 through rectangular holes. One end of the rectangular plate 15 passes through the rectangular holes and is fixedly connected to a back plate. A housing 5 is fixedly connected to one side of the back plate. One side of the housing 5 contacts the side wall of the guide plate 9. An adjusting cylinder 24 is fixedly connected inside the frame 16. One end of the piston rod of the adjusting cylinder 24 passes through the mounting part and is fixedly connected to one side of the back plate. An adjustable sliding assembly is installed inside the housing 5. The sliding assembly contacts the corner of the guide plate 9 through the load-bearing roller 6. By adjusting the spacing of the sliding assembly, the load-bearing roller 6 is made to contact the guide plate 9 tightly, thereby changing the play between the guide rail accessories and making the support strength of the guide rail assembly adjustable. Limiting strips 34 are fixedly connected to both the upper and lower sides of the frame 16. A limiting groove that cooperates with the limiting strip 34 is opened on one side of the rectangular plate 15.

[0025] In the above technical solution, the back plate is directly pushed by adjusting the oil cylinder 24 to move the housing 5. The movement of the housing 5 causes the sliding component to contact the guide plate 9. In this way, the gap and support force between the slider and the column 3 can be adjusted to eliminate mechanical clearance, and at the same time, different sizes of support force can be provided to the slider. To enable multiple adjustments to the supporting force, this technical solution designs an adjustable sliding assembly, specifically including two sets of movable frames 37. Two curved arms 33 are fixedly connected to the opposite sides of the two movable frames 37. The side wall of the housing 5 is sleeved with the curved arms 33 through a sliding sleeve. The curved arms 33 are rotatably connected to the load-bearing rollers 6. A second hydraulic cylinder 36 is fixedly connected to one side of the housing 5. The output end of the second hydraulic cylinder 36 is fixedly connected to the center of the movable frame 37. An inclined surface 35 is provided at the corner of the guide plate 9. The angle between the inclined surface 35 and the plane of the guide plate 9 is 45°. The load-bearing rollers 6 are inclined and maintain line contact with the inclined surface 35.

[0026] like Figure 8 As shown, the second hydraulic cylinder 36 can push the moving frame 37 to move the bent arm 33. When the bent arm 33 moves, it drives the load-bearing roller 6 to press against the inclined surface 35, eliminating the gap caused by mechanical wear. It can also adjust the friction between the load-bearing roller 6 and the inclined surface 35 in advance according to the load of the press to ensure support stability. The upper end of the housing 5 is fixedly connected to an air pipe connector. The bent arm 33 is a hollow structure and has an air inlet on the side wall, so that the compressed gas entering the housing 5 can pass through the bent arm 33 and be discharged. At this time, the compressed gas can be used to cool the gap of the sliding component and play a heat insulation role between the slider and the guide rail assembly, avoiding the acceleration of mechanical wear due to thermal expansion and contraction caused by temperature changes.

[0027] A directional part 31 is provided at the center of one side of the housing 5. A directional groove that cooperates with the directional part 31 is opened on the side wall of the guide plate 9. Two guide strips 32 are provided on one side of the housing 5. The two guide strips 32 are symmetrically distributed on both sides of the directional part 31. A guide groove that cooperates with the guide strips 32 is opened on the side wall of the guide plate 9. Two brake blocks 38 are provided inside the housing 5. Two hydraulic pistons 39 are fixedly connected between the two brake blocks 38. A strip-shaped hole is opened on one side of the directional part 31. One side of the brake block 38 passes through the strip-shaped hole and contacts the side wall of the directional groove. Multiple guide shafts 40 are sleeved through blind holes on the opposite sides of the two brake blocks 38. Friction plates are embedded on the opposite sides of the directional groove. The brake block 38 has an L-shaped structure. One side of the brake block 38 passes through the strip-shaped hole and contacts the friction plate. The hydraulic piston 39 can simultaneously push the two brake blocks 38 to move relative to each other. When moving, the brake blocks 38 contact the friction plate. In this way, the slider can be braked and positioned by the friction between the brake blocks 38 and the friction plate, which helps to maintain the sealing when the mold is closed and provides constant pressure to the slider.

[0028] It should be noted that the term "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable-pitch slider device for a four-point long-stroke multi-link press, comprising a multi-link press main body (1), an upper frame (2), and four columns (3) fixed to the bottom of the upper frame (2), characterized in that, Also includes: The slider is a double-layer structure consisting of a top frame (7) and a bottom plate (8). By adjusting the distance between the top frame (7) and the bottom plate (8), the double-layer slider can quickly form an installation position that matches the height of the mold, thereby achieving soft adaptation of the mold height and shortening the time for mold changing and debugging. The adjustment mechanism is provided in two sets and symmetrically installed in the top frame (7). It can quickly adjust the distance between the top frame (7) and the bottom plate (8). At the same time, it can also adjust the distance between the top frame (7) and the bottom plate (8) by adjusting the height of the fulcrum. The guide rail assembly is installed at the four corners of the top frame (7). The gap between the guide rails can be adjusted according to the load of the press and the play between the guide rail accessories, thereby providing dynamic support for the slider and enabling the guide rail to provide stable support and guidance for the slider.

2. The adjustable-pitch slider device for a four-point long-stroke multi-link press according to claim 1, characterized in that: The adjustment mechanism includes two guide columns (13), each with a guide sleeve (14) fitted onto its sidewall. The guide sleeve (14) is fixed inside the top frame (7). The lower end of each guide column (13) passes through the guide sleeve (14) and is fixedly connected to the upper end of the base plate (8). A crossbeam (11) is fixedly connected between the two guide columns (13). A brake plate (17) is fixedly connected to the sidewall of each crossbeam (11). Each brake plate (17) has a slotted hole on its sidewall. A shaft pin (27) is fitted into the slotted hole. A main shaft (21) is rotatably connected inside the top frame (7) via a bearing seat. The shaft of the main shaft (21) is... An eccentric wheel (19) is fixedly connected to the wall. Two rocker arms (20) are sleeved on the side wall of the eccentric wheel (19). A transmission rod (18) is fixedly connected to the side wall of the rocker arm (20), and a pin (30) is fixedly connected to one side of the transmission rod (18). The transmission rods (18) on the two rocker arms (20) are rotatably connected to the first hydraulic cylinder (28) through the pin (30). A convex ring is provided on the side wall of the eccentric wheel (19). The convex ring contacts the side wall of the rocker arm (20). A positioning ring (26) is fixedly connected to the side wall of the eccentric wheel (19). The positioning ring (26) is used to limit the rocker arm (20) sleeved on the cam (25). The main shaft (21) is equipped with a transmission mechanism for adjusting the angle of the eccentric wheel (19). The eccentric wheel (19) is rotated by the transmission mechanism to change the support height of the rocker arm (20), thereby achieving fine adjustment of the gap between the top frame (7) and the bottom plate (8). The multi-link press main unit (1) is equipped with multiple transmission columns (10), and the transmission columns (10) are fixedly connected to the top frame (7).

3. The adjustable-pitch slider device for a four-point long-stroke multi-link press according to claim 2, characterized in that: The transmission mechanism includes a stepper motor (12), the output end of which is fixedly connected to a worm gear reducer (23). The output shaft of the worm gear reducer (23) is fixedly connected to a rotating shaft, and the shaft wall of the rotating shaft is rotatably connected to the inner wall of the top frame (7) through a bearing seat. A drive gear (29) is fixedly connected to the shaft wall of the rotating shaft. A driven gear (22) meshes with one side of the drive gear (29). The driven gear (22) is coaxially fixedly connected to one end of the main shaft (21).

4. The adjustable-pitch slider device for a four-point long-stroke multi-link press according to claim 1, characterized in that: The guide rail assembly includes a guide plate (9), a bracket (4) is fixedly connected to one side of the guide plate (9), the bracket (4) is fixed at the corner of the column (3), and an installation part is provided at each of the four corners of the top frame (7). A frame (16) is fixedly connected to the installation part. A rectangular plate (15) is slidably connected to both the upper and lower ends of the frame (16). The installation part is sleeved with the side wall of the rectangular plate (15) through a rectangular hole. One end of the rectangular plate (15) passes through the rectangular hole and is fixedly connected to a back plate. A housing (5) is fixedly connected to one side of the back plate. One side of the housing (5) contacts the side wall of the guide plate (9). An adjusting cylinder (24) is fixedly connected inside the frame (16). One end of the piston rod of the adjusting cylinder (24) passes through the installation part and is fixedly connected to one side of the back plate. The housing (5) is equipped with an adjustable sliding assembly. The sliding assembly contacts the corner of the guide plate (9) through the load-bearing roller (6). By adjusting the spacing of the sliding assembly, the load-bearing roller (6) is made to contact the guide plate (9) tightly, thereby changing the play between the guide rail accessories and making the support strength of the guide rail assembly adjustable. Limiting strips (34) are fixedly connected to both the upper and lower sides of the frame (16). A limiting groove that cooperates with the limiting strip (34) is opened on one side of the rectangular plate (15).

5. The adjustable-pitch slider device for a four-point long-stroke multi-link press according to claim 4, characterized in that: The sliding assembly includes two sets of movable frames (37). Two curved arms (33) are fixedly connected to the opposite sides of the two movable frames (37). The side wall of the housing (5) is sleeved with the curved arms (33) through a sliding sleeve. The curved arms (33) are rotatably connected to the load-bearing rollers (6). A second hydraulic cylinder (36) is fixedly connected to one side of the housing (5). The output end of the second hydraulic cylinder (36) is fixedly connected to the center of the movable frame (37).

6. The adjustable-pitch slider device for a four-point long-stroke multi-link press according to claim 5, characterized in that: The guide plate (9) has a slope (35) at its corner. The angle between the slope (35) and the plane of the guide plate (9) is 45°. The load-bearing roller (6) is inclined and maintains line contact with the slope (35).

7. The adjustable-pitch slider device for a four-point long-stroke multi-link press according to claim 5, characterized in that: A directional part (31) is provided at the center of one side of the housing (5). A directional groove that cooperates with the directional part (31) is provided on the side wall of the guide plate (9). Two guide strips (32) are provided on one side of the housing (5). The two guide strips (32) are symmetrically distributed on both sides of the directional part (31). A guide groove that cooperates with the guide strips (32) is provided on the side wall of the guide plate (9).

8. The adjustable-pitch slider device for a four-point long-stroke multi-link press according to claim 7, characterized in that: Two brake blocks (38) are provided inside the housing (5). Two hydraulic pistons (39) are fixedly connected between the two brake blocks (38). A strip hole is opened on one side of the directional part (31). One side of the brake block (38) passes through the strip hole and contacts the side wall of the directional groove. Multiple guide shafts (40) are sleeved on the opposite side of the two brake blocks (38) through blind holes.

9. The adjustable-pitch slider device for a four-point long-stroke multi-link press according to claim 8, characterized in that: Friction pads are embedded on both sides of the directional groove. The brake block (38) has an L-shaped structure. One side of the brake block (38) passes through the strip hole and contacts the friction pad.

10. The adjustable-pitch slider device for a four-point long-stroke multi-link press according to claim 5, characterized in that: The upper end of the housing (5) is fixedly connected to an air pipe connector. The curved arm (33) is a hollow structure and has an air inlet on the side wall, so that the compressed gas entering the housing (5) can pass through the curved arm (33) and be discharged.

Images