A gravity support device for a drawing die

Abstract

This invention discloses a gravity support device for a drawing die. The device includes a housing, with symmetrical drive rods slidably connected to the inner cavity of the housing. A worktable is fitted against the lower part of the housing, and a drawing die is placed on top of the worktable. Symmetrical driven rods are arranged on the inner wall of the housing cavity. The end of each driven rod near a movable block is elastically connected to the inner wall of the housing cavity via symmetrical first springs. An adjustment mechanism is arranged in the middle of the inner cavity of each drive rod near the driven rod. A second electric push rod is drivenly connected to the middle of the side of the drive rod away from the movable block. When the output end of the adjustment mechanism approaches and contacts the drawing die, the first springs drive the symmetrical driven rods to gradually approach the drawing die. In this invention, both the adjustment rods and the limiting rods are symmetrically arranged. When only one limiting rod loses its limiting effect on the driven rod, the other limiting rod will still limit the driven rod.

Description

Technical Field

[0001] This invention relates to the field of mold support device technology, specifically a gravity support device for a drawing die. Background Technology

[0002] The drawing process utilizes the cold work hardening characteristics of steel. The so-called cold work hardening characteristics refer to the increase in the strengthening indicators of metal, such as yield point and hardness, during cold plastic deformation. At room temperature, the steel is stretched to the strengthening stage and then the external force is removed. After this processing, the length of the steel increases, the diameter decreases, and the elastic limit rises to the level equivalent to the strengthening stage of the raw material. This greatly improves the elastic limit of the material and reduces the strain rate, thereby increasing the stiffness of the material.

[0003] For example, Chinese Patent Publication No. CN208374028U discloses a positioning device and a drawing die having the positioning device, including a positioning component, a mounting component and an elastic element. The mounting component has a first mounting hole, and the positioning component is movably installed in the first mounting hole. The bottom end of the first mounting hole is provided with an elastic element, the upper end of the positioning component protrudes from the upper surface of the mounting component, and the lower end of the positioning component abuts against the elastic element.

[0004] In this solution, the pop-up positioning section limits the forming workpiece. However, when producing curved plates, the lower die of the drawing die will have a curvature. When the rectangular plate is placed on the lower die, the difference in height between the edge of the lower die and its top makes it difficult for the operator to judge whether the plate is centered and aligned with the die. This results in a lot of time being wasted during the plate placement process. It is not suitable for dies of various sizes, and the formed curved workpiece is also difficult to position. Summary of the Invention

[0005] The purpose of this invention is to provide a gravity support device for drawing dies to solve the problems mentioned in the background art.

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

[0007] A gravity support device for a drawing die includes a housing. Symmetrical drive rods are slidably connected to the inner cavity of the housing. A worktable is fitted against the lower part of the housing, and a drawing die is placed above the worktable. Symmetrical driven rods are arranged on the inner wall of the housing cavity. The end of each driven rod near a movable block is elastically connected to the inner wall of the housing cavity via symmetrical first springs. An adjustment mechanism is arranged in the middle of the inner cavity of the drive rod near the driven rod. A second electric push rod is drivenly connected to the middle of the side of the drive rod away from the movable block. When the output end of the adjustment mechanism approaches and contacts the drawing die, the first springs will drive the symmetrical driven rods to gradually approach the drawing die.

[0008] As a further aspect of the present invention: a symmetrical sliding groove is provided in the middle of the drive rod, and both ends of the driven rod are slidably connected to the symmetrical sliding groove. A movable block is provided on the side of the driven rod away from the adjustment mechanism. The movable block is slidably connected to the bottom of the inner cavity of the housing. A first balance spring is fixedly connected to one side of the lower part of the movable block, and a second balance spring is fixedly connected to the other side of the lower part of the movable block. The second balance spring and the first balance spring are symmetrical about the center position of the movable block.

[0009] As a further aspect of the present invention: the adjustment mechanism includes an adjustment rod, which is slidably connected to the upper part of the inner cavity of the drive rod. The drive rod has a mounting groove in the middle. A first slider is fixedly connected to the middle of the lower end of the adjustment rod. The first slider is located in the mounting groove. An extension plate is attached to the side of the lower end of the first slider near the movable block. A driven block is fixedly connected to the side of the extension plate near the movable block. The lower end of the extension plate is slidably connected to the bottom of the inner cavity of the mounting groove. The side of the extension plate away from the driven block is elastically connected to the sidewall of the inner cavity of the mounting groove by symmetrical second springs.

[0010] As a further embodiment of the present invention: both sides of the lower end of the adjusting rod are vertically slidably connected to limit rods, the upper end of the limit rod is elastically connected to the bottom of the inner cavity of the adjusting rod through a third spring, a limit groove is formed in the middle of the upper end of the driven rod, and the end of the limit rod away from the adjusting rod is slidably connected in the limit groove.

[0011] As a further aspect of the present invention: an adjusting plate is fixedly connected to the two ends of the driven rod away from the driven block; a second inclined side is provided on the side of the driven rod near the adjusting plate; a first inclined side is provided on the side of the adjusting plate near the movable block; a gap is provided between the ends of the first and second inclined sides near the driven block; the horizontal width of the gap is the same as the diameter of the limiting rod; a first inclined surface is fixedly connected between the second and first inclined sides; the vertical height of the end of the first inclined surface near the movable block is lower than the end away from the movable block.

[0012] As a further aspect of the present invention: a heightening block is provided on the side of the movable block near the driven rod, the lower end of the heightening block is slidably connected to the middle of the upper end of the driven rod, a retractable rod is fixedly connected on the side of the heightening block near the movable block, the end of the retractable rod away from the heightening block is fixedly connected to the movable block, and mounting blocks are fixedly connected to the middle of the upper end of the drive rod and the middle of the upper end of the heightening block.

[0013] As a further aspect of the present invention: a symmetrical first electric push rod is fixedly connected to the upper end of the housing, and a positioning frame is fixedly connected to the upper end of the symmetrical first electric push rod. An installation cavity is opened on the side of the mounting block away from the positioning frame. A second slider is vertically slidably connected to the inner cavity of the installation cavity. A cavity is opened on the upper part of the second slider away from the positioning frame. A support plate is movably connected to the upper part of the inner cavity of the cavity. A support rod is provided below the support plate. The support rod is slidably connected to the second slider.

[0014] As a further embodiment of the present invention: a balance plate is slidably connected to the lower part of the mounting block, a fixing plate is fixedly connected to the upper part of the balance plate away from the mounting block, the fixing plate and the mounting block are elastically connected by a fourth spring, a slide plate is slidably connected to the middle part of the upper part of the fixing plate, a positioning rod is fixedly connected to the side of the slide plate near the positioning frame, the positioning rod is slidably connected to the positioning frame, the end of the support rod away from the mounting block is fixedly connected to the middle part of the slide plate, a connecting plate is fixedly connected to the upper end of the slide plate, and an inclined block is fixedly connected to the end of the connecting plate away from the slide plate.

[0015] As a further aspect of the present invention: a rack is fixedly connected to the upper end of the support rod near the support plate, a rotating rod is fixedly connected to the support plate near the support rod, a first groove is formed at the upper end of the support plate, a gear is fixedly connected to the middle of the rotating rod, the gear is located in the first groove, and the gear meshes with the rack.

[0016] As a further embodiment of the present invention: symmetrical support rods are fixedly connected to the side of the support rod near the rotating rod, the upper end of the support rod is in contact with the support plate, a second groove is opened on the side of the moving groove near the support plate, adjusting columns are elastically connected to both ends of the rotating rod, the adjusting columns are rotatably connected in the second groove, an inclined surface is opened on the end of the adjusting column away from the support plate, symmetrical movable rods are fixedly connected to both sides of the support plate, and a horizontal groove and an arc-shaped groove are opened in the inner cavity of the cavity to cooperate with the cavity.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The adjusting rod and the limiting rod are symmetrically arranged. When only one limiting rod loses its limiting function on the driven rod, the limiting rod on the other side will still limit the driven rod. Only after both symmetrical limiting rods are separated from the driven rod can the driven rod fit against the outer wall of the drawing die under the action of the first spring. The movable block will be located at the center of the drawing die under the elastic force of the symmetrical first balance spring, thereby driving the raising block and the mounting block to be located at the center of the drawing die. The symmetrical mounting block can automatically adapt to the position of the drawing die, and can adapt to drawing dies of various sizes and shapes to complete the processing of workpieces of various sizes and shapes, thereby providing stable support and positioning for the forming template. During the drawing operation, the symmetrical support plate will rotate downward to move away from the template, thereby avoiding slippage and scratches on the template. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the side structure in this invention.

[0021] Figure 3 This is a schematic diagram of the internal structure of the shell in this invention.

[0022] Figure 4 This is a schematic diagram of the drive rod in this invention.

[0023] Figure 5 For the present invention Figure 4 A schematic diagram of the structure of area A in the middle.

[0024] Figure 6 For the present invention Figure 4 A schematic diagram of the structure of area B in the middle.

[0025] Figure 7 This is a schematic diagram of the driven block in this invention.

[0026] Figure 8 This is a schematic diagram of the mounting block in this invention.

[0027] Figure 9 This is a schematic diagram of the internal structure of the mounting block in this invention.

[0028] Figure 10 For the present invention Figure 9 A schematic diagram of the structure of area C.

[0029] Figure 11 This is a schematic diagram of the support plate in this invention.

[0030] In the diagram: 1. Housing; 2. Positioning frame; 3. First electric push rod; 4. Movable block; 5. First balance spring; 6. Second electric push rod; 7. Drive rod; 8. Second balance spring; 9. Adjusting plate; 10. Driven rod; 11. Limiting groove; 12. Slide groove; 13. Mounting groove; 14. First inclined side; 15. Second inclined side; 16. First inclined surface; 17. Adjusting rod; 18. Limiting rod; 19. Driven block; 20. Second inclined surface; 21. First slider; 22. Arc-shaped edge; 23. 24. Mounting block; 25. Second slider; 26. Cavity; 27. Support plate; 28. Connecting plate; 29. ​​Slide plate; 30. Fixing plate; 31. Balance plate; 32. Support rod; 33. Slot 1; 34. Rack; 35. Rotating rod; 36. Gear; 37. Moving slot; 38. Slot 2; 39. Adjusting column; 40. Heightening block; 41. Support rod; 42. Extension plate; 43. Inclined block; 44. Arc-shaped slot; 45. Horizontal slot; 46. Movable rod; 47. Positioning rod. Detailed Implementation

[0031] Please see Figure 1-3 In this embodiment of the invention, a gravity support device for a drawing die includes a housing 1. Symmetrical drive rods 7 are slidably connected to the inner cavity of the housing 1. A worktable is fitted against the lower part of the housing 1, and a drawing die is placed on top of the worktable. Symmetrical grooves 12 are formed in the middle of the drive rods 7. Symmetrical driven rods 10 are provided on the inner wall of the housing 1, with both ends of the driven rods 10 slidably connected to the symmetrical grooves 12. An adjustment mechanism is provided on the side of the inner cavity of the drive rods 7 near the driven rods 10. A movable block 4 is provided on the side of the driven rods 10 away from the adjustment mechanism. The end of the driven rod 10 near the movable block 4 is elastically connected to the inner wall of the housing 1 via symmetrical first springs. The movable block 4 is connected to the bottom of the inner cavity of the housing 1. The sliding connection is provided. A first balance spring 5 is fixedly connected to one side of the lower part of the movable block 4, and a second balance spring 8 is fixedly connected to the other side of the lower part of the movable block 4. The second balance spring 8 and the first balance spring 5 are symmetrical about the center position of the movable block 4. The end of the second balance spring 8 away from the movable block 4 is fixedly connected to the drive rod 7, and the end of the first balance spring 5 away from the movable block 4 is fixedly connected to another drive rod 7. A second electric push rod 6 is connected to the middle of the side of the drive rod 7 away from the movable block 4. When the second electric push rod 6 pushes the drive rod 7 to drive the output end of the adjustment mechanism to move horizontally, the output end of the adjustment mechanism will approach and contact the drawing die. At this time, the symmetrical driven rod 10 will gradually approach the drawing die.

[0032] Please see Figure 4-7The adjustment mechanism includes an adjustment rod 17, which is slidably connected to the upper part of the inner cavity of the drive rod 7. The adjustment rod 17 is located above the slide groove 12. The drive rod 7 has a mounting groove 13 in the middle. A first slider 21 is fixedly connected to the lower middle part of the adjustment rod 17. The first slider 21 is located in the mounting groove 13. An extension plate 42 is attached to the side of the lower end of the first slider 21 near the movable block 4. A driven block 19 is fixedly connected to the side of the extension plate 42 near the movable block 4. The lower end of the extension plate 42 is slidably connected to the bottom of the inner cavity of the mounting groove 13. The side of the extension plate 42 away from the driven block 19 is elastically connected to the side wall of the inner cavity of the mounting groove 13 by symmetrical second springs. As the rod 6 pushes the drive rod 7 to move, the driven block 19 will gradually approach the side wall of the drawing die. After the driven block 19 contacts the side wall of the drawing die, the driven block 19 will move relative to the direction of the adjusting rod 17. The driven block 19 has a second inclined surface 20 on the side near the adjusting rod 17. The second inclined surface 20 is a surface that is inclined towards the direction of the movable block 4. The lower end of the first slider 21 has an arc-shaped edge 22 on the side near the driven block 19. When the driven block 19 moves relative to the direction of the adjusting rod 17, it will push the first slider 21 to move vertically upward through the cooperation of the second inclined surface 20 and the arc-shaped edge 22, thereby driving the adjusting rod 17 to move vertically upward.

[0033] Both sides of the lower end of the adjusting rod 17 are vertically slidably connected to limit rods 18. The upper end of the limit rod 18 is elastically connected to the bottom of the inner cavity of the adjusting rod 17 via a third spring. A limit groove 11 is formed in the middle of the upper end of the driven rod 10. The end of the limit rod 18 away from the adjusting rod 17 is slidably connected to the limit groove 11. During the movement of the driving rod 7, the adjusting rod 17 drives the limit rod 18 to slide along the limit groove 11. When the limit rod 18 is in the inner cavity of the limit groove 11, the limit rod 18 limits the position of the driven rod 10 by restricting the position of the limit groove 11. During the process of the driven block 19 lifting the first slider 21 and thus lifting the adjusting rod 17, the adjusting rod 17 drives the limit rod 18 to rise synchronously, thereby separating the limit rod 18 from the limit groove 11. This causes the limiting rod 18 to lose its limiting effect on the driven rod 10. At this time, under the action of the first spring, the symmetrical driven rods 10 will synchronously approach the drawing die. Since the adjusting rod 17 and the limiting rod 18 are symmetrically arranged, when only one side of the adjusting rod 17 drives the limiting rod 18 to move upward, that is, when only one side of the driving rod 7 is in contact with the outer wall of the drawing die, although the limiting rod 18 on one side loses its limiting effect on the driven rod 10, the limiting rod 18 on the other side will still limit the driven rod 10, thus keeping the driven rod 10 away from the drawing die. Only when both symmetrical driving rods 7 are in contact with the outer wall of the drawing die will the limiting rod 18 completely release its limiting effect on the driven rod 10, so that the driven rod 10 is in contact with the outer wall of the drawing die under the action of the first spring.

[0034] Please see Figure 8-11 After the driven rod 10 moves toward the drawing die, the limiting rod 18 disengages from the limiting groove 11 and separates from the driven rod 10. Adjusting plates 9 are fixedly connected to the ends of the driven rod 10 away from the driven block 19. A second inclined side 15 is provided on the side of the driven rod 10 near the adjusting plate 9, and a first inclined side 14 is provided on the side of the adjusting plate 9 near the movable block 4. Both the first inclined side 14 and the second inclined side 15 are inclined toward the direction of the driven block 19. The vertical planes of the ends of the first inclined side 14 and the second inclined side 15 near the driven block 19 are close to the inner cavity of the limiting groove 11. The vertical planes of the sidewalls of the adjusting plate 9 and the first inclined side 14 and the second inclined side 15 are aligned. A gap is provided between the ends of the first inclined side 14 and the second inclined side 15 near the driven block 19. The horizontal width of this gap is the same as the diameter of the limiting rod 18. The second inclined side 15 and the first inclined side 14 are fixedly connected by a first inclined surface 16. The vertical height of the end of the first inclined surface 16 near the movable block 4 is lower than that of the end away from the movable block 4, and the end of the first inclined surface 16 away from the movable block 4 is connected to the gap. When the second electric push rod 6 drives the drive rod 7 away from the drawing die, the limiting rod 18 will gradually approach. The first inclined surface 16 is in contact with the first inclined surface 14. As the limiting rod 18 moves away from the movable block 4 at the upper end of the first inclined surface 16, the third spring is gradually compressed. After the limiting rod 18 contacts the first inclined surface 14, the horizontally moving limiting rod 18 pushes the adjusting plate 9 to move through the first inclined surface 14, thereby driving the driven rod 10 to move towards the movable block 4, thus causing the limiting rod 18 to move relative to the gap. By opening a second inclined surface 15 on the side wall of the driven rod 10, a greater movement can be provided for the limiting rod 18, which moves in conjunction with the first inclined surface 14. The space allows the limiting rod 18 to smoothly enter the inner cavity of the limiting groove 11 from the gap, thereby limiting the driven rod 10. After the limiting rod 18 crosses the gap and enters the limiting groove 11, the third spring will rebound and drive the limiting rod 18 to move down. At this time, the lower end face of the limiting rod 18 coincides with the bottom surface of the inner cavity of the limiting groove 11, and the plane where the top of the connection between the first inclined surface 16 and the gap is located is higher than the plane where the bottom of the inner cavity of the limiting groove 11 is located, so that the limiting rod 18 can be stably located in the inner cavity of the limiting groove 11 and will not return to the upper end of the first inclined surface 16.

[0035] A heightening block 40 is provided on the side of the movable block 4 near the driven rod 10. The lower end of the heightening block 40 is slidably connected to the middle of the upper end of the driven rod 10. A retraction rod is fixedly connected to the side of the heightening block 40 near the movable block 4. The end of the retraction rod away from the heightening block 40 is fixedly connected to the movable block 4. Mounting blocks 23 are fixedly connected to the middle of the upper end of the drive rod 7 and the middle of the upper end of the heightening block 40. When the symmetrical drive rods 7 cannot simultaneously fit against the outer wall of the drawing die, the first balance springs 5 ​​on both sides of the movable block 4 are compressed to different degrees. However, since the movable block 4 is horizontally slidably connected to the side wall of the housing 1, the first balance spring 5 with a greater degree of compression will extend, thereby pushing the movable block 4 to squeeze the first balance spring 5 on the other side, thus making the symmetrical first balance springs 5... The first balance spring 5 is compressed to the same degree, and the symmetrical first balance spring 5 will maintain balance only when its length after compression is the same. The symmetrical drive rods 7 are all in contact with the drawing die, so the movable block 4 will be located at the center of the drawing die under the elastic force of the symmetrical first balance springs 5. The position and size requirements of the die are not high during use. It is only necessary to put the housing 1 on the outside of the die to automatically adapt to the position of the die. It will also automatically center and position itself with the lifting block 40 at the center of the die, thereby driving the lifting block 40 and the mounting block 23 to be at the center of the drawing die. The upper end of the housing 1 is fixedly connected to the symmetrical first electric push rod 3. The upper end of the symmetrical first electric push rod 3 is fixedly connected to the positioning frame 2. The mounting block 23 is far away from the positioning frame 2. A mounting cavity 24 is provided on one side of the positioning frame 2. A second slider 25 is vertically slidably connected to the inner cavity of the mounting cavity 24. A cavity 26 is provided on the upper part of the second slider 25 away from the positioning frame 2. A support plate 27 is movably connected to the upper part of the cavity 26. A support rod 32 is provided below the support plate 27 and is slidably connected to the second slider 25. A balance plate 31 is slidably connected to the lower part of the mounting block 23. A fixing plate 30 is fixedly connected to the upper end of the balance plate 31 away from the mounting block 23. The fixing plate 30 and the mounting block 23 are elastically connected by a fourth spring. A sliding plate 29 is slidably connected to the middle of the upper end of the fixing plate 30. A positioning rod 47 is fixedly connected to the side of the sliding plate 29 near the positioning frame 2. The positioning rod 47 is slidably connected to the positioning frame 2. The support rod 32 is slidably connected to the second slider 25 away from the second slider 26. One end of the mounting block 23 is fixedly connected to the middle of the slide plate 29. A connecting plate 28 is fixedly connected to the upper end of the slide plate 29. An inclined block 43 is fixedly connected to the end of the connecting plate 28 away from the slide plate 29. When the drive rod 7 and the driven rod 10 move, they will drive the mounting block 23 closer to the drawing die, so that the mounting block 23 and the side of the second slider 25 away from the positioning frame 2 are in contact with the outer wall of the drawing die. For a die with a curvature, two sides cannot be completely in contact with the template to be formed. By setting the symmetrical second slider 25 and the support plate 27, the template to be formed can be supported and positioned. By adjusting the height of the positioning frame 2 by the first electric push rod 3, the slide plate 29 can be moved in the vertical direction, thereby driving the second slider 25 to move through the support rod 32.This allows the upper surface of the support plate 27 to coincide with the upper surface of the drawing die. During the drawing process, after adjusting the height and position of the support plate 27, the die is placed on the symmetrical support plate 27. Then, the upper die is moved down. At this point, because the inclined block 43 is further away from the slide plate 29 relative to the support plate 27, and the inclined block 43 is located above the support plate 27, the downward movement of the upper die causes its sidewall to contact the side of the inclined block 43 away from the slide plate 29. This pushes the slide plate 29, causing the support rod 32 to move away from the second slider 25.

[0036] A rack 34 is fixedly connected to the upper end of the support rod 32 near the support plate 27. A rotating rod 35 is fixedly connected to the support plate 27 near the support rod 32. A first groove 33 is formed at the upper end of the support plate 27. A gear 36 is fixedly connected to the middle of the rotating rod 35. The gear 36 is located in the first groove 33 and meshes with the rack 34. When the rack 34 is in the initial position, i.e., when the support rod 32 is moving, the rack 34 is separated from the gear 36. The rack 34 will approach and contact the gear 36 as the support rod 32 moves, thereby driving the support plate 27 to rotate by driving the gear 36 to rotate. A symmetrical support rod 41 is fixedly connected to the side of the support rod 32 near the rotating rod 35. The upper end of the support rod 41 is connected to the support plate 27. The support plate 27 fits snugly, thus keeping the support plate 27 horizontal when bearing gravity. Symmetrical moving grooves 37 are provided in the upper part of the inner cavity of the cavity 26. A second groove 38 is provided on the side of the moving groove 37 closest to the support plate 27. Adjusting columns 39 are elastically connected to both ends of the rotating rod 35. The adjusting columns 39 are rotatably connected to the second groove 38. An inclined surface is provided at the end of the adjusting column 39 away from the support plate 27. During the movement of the support plate 27 with the mounting block 23, if the support plate 27 contacts the mold sidewall, the inclined surface will contact the connection between the second groove 38 and the moving groove 37, causing the second groove 38 to move relative to the rotating rod 35 and then horizontally along the moving groove 37, retracting into the cavity 26. This ensures that even if... The support plate 27 contacts the mold sidewall without curvature, which will not affect the overall operation of the device. Furthermore, the support plate 27 in contact with the mold facilitates the determination of the height moved by the positioning frame 2. If the positioning frame 2 is too high, and the upper surface of the support plate 27 is higher than the upper surface of the mold, then the support plate 27 will not be able to be squeezed into the cavity 26. Symmetrical movable rods 46 are fixedly connected to both sides of the support plate 27. The cavity 26 has a horizontal groove 45 and an arc-shaped groove 44 that cooperate with the cavity 26. When the rack 34 drives the support plate 27 to rotate via the gear 36, the support plate 27 will drive the movable rod 46 to move along the arc-shaped groove 44. When the support plate 27 is squeezed, it will drive the movable rod 46 along... The horizontal groove 45 slides, and through the cooperation of the symmetrical moving groove 37 and the second groove 38, as well as the symmetrical movable rod 46 and the horizontal groove 45, the support plate 27 can remain stable during horizontal movement. The rotating rod 35 is connected to the inner wall of the cavity 26 by a symmetrical fifth spring (not shown in the diagram). The fifth spring is used to return the support plate 27, which has moved horizontally into the cavity 26, to its initial position. When supporting the drawing film, this device does not require repeated position adjustments. The symmetrical mounting block 23 can automatically adapt to the position of the drawing die, thereby providing stable support and positioning for the template to be formed. During the drawing operation, the symmetrical support plate 27 will rotate downwards to move away from the template, thereby avoiding slippage and scratches on the template.

Claims

1. A gravity support device for a drawing die, comprising a housing, characterized in that, The inner cavity of the housing is slidably connected with symmetrical drive rods. A worktable is fitted to the lower part of the housing, and a drawing die is placed on the upper part of the worktable. Symmetrical driven rods are provided on the inner cavity sidewall of the housing. The end of the driven rod near the movable block is elastically connected to the inner cavity sidewall of the housing through symmetrical first springs. An adjustment mechanism is provided in the middle of the inner cavity of the drive rod near the driven rod. A second electric push rod is connected to the middle of the side of the drive rod away from the movable block. When the output end of the adjustment mechanism approaches and contacts the drawing die, the first spring will drive the symmetrical driven rods to gradually approach the drawing die. The drive rod has a symmetrical sliding groove in the middle. Both ends of the driven rod are slidably connected to the symmetrical sliding groove. A movable block is provided on the side of the driven rod away from the adjustment mechanism. The movable block is slidably connected to the bottom of the inner cavity of the housing. A first balance spring is fixedly connected to one side of the lower part of the movable block, and a second balance spring is fixedly connected to the other side of the lower part of the movable block. The second balance spring and the first balance spring are symmetrical about the center position of the movable block. The adjustment mechanism includes an adjustment rod, which is slidably connected to the upper part of the inner cavity of the drive rod. The drive rod has a mounting groove in the middle. A first slider is fixedly connected to the middle of the lower end of the adjustment rod. The first slider is located in the mounting groove. An extension plate is attached to the side of the lower end of the first slider near the movable block. A driven block is fixedly connected to the side of the extension plate near the movable block. The lower end of the extension plate is slidably connected to the bottom of the inner cavity of the mounting groove. The side of the extension plate away from the driven block is elastically connected to the side wall of the inner cavity of the mounting groove through symmetrical second springs. The lower end of the adjusting rod is vertically slidably connected to both sides of the limiting rod. The upper end of the limiting rod is elastically connected to the bottom of the inner cavity of the adjusting rod through a third spring. A limiting groove is opened in the middle of the upper end of the driven rod. The end of the limiting rod away from the adjusting rod is slidably connected to the limiting groove.

2. The gravity support device for a drawing die according to claim 1, characterized in that, Adjusting plates are fixedly connected to both ends of the driven rod on the side away from the driven block. A second inclined side is provided on the side of the driven rod near the adjusting plate, and a first inclined side is provided on the side of the adjusting plate near the movable block. There is a gap between the ends of the first and second inclined sides near the driven block. The horizontal width of the gap is the same as the diameter of the limiting rod. A first inclined surface is fixedly connected between the second and first inclined sides. The vertical height of the end of the first inclined surface near the movable block is lower than that of the end away from the movable block.

3. The gravity support device for a drawing die according to claim 1, characterized in that, A heightening block is provided on the side of the movable block near the driven rod. The lower end of the heightening block is slidably connected to the middle of the upper end of the driven rod. A retractable rod is fixedly connected to the side of the heightening block near the movable block. The end of the retractable rod away from the heightening block is fixedly connected to the movable block. Mounting blocks are fixedly connected to the middle of the upper end of the drive rod and the middle of the upper end of the heightening block.

4. The gravity support device for a drawing die according to claim 3, characterized in that, The upper end of the housing is fixedly connected to a symmetrical first electric push rod, and the upper ends of the symmetrical first electric push rods are fixedly connected to a positioning frame. The mounting block has a mounting cavity on the side away from the positioning frame. A second slider is vertically slidably connected to the inner cavity of the mounting cavity. A cavity is opened on the upper part of the second slider away from the positioning frame. A support plate is movably connected to the upper part of the inner cavity of the cavity. A support rod is provided below the support plate. The support rod is slidably connected to the second slider.

5. A gravity support device for a drawing die according to claim 4, characterized in that, A balance plate is slidably connected to the lower part of the mounting block. A fixing plate is fixedly connected to the upper part of the balance plate on the side away from the mounting block. The fixing plate and the mounting block are elastically connected by a fourth spring. A slide plate is slidably connected to the middle of the upper part of the fixing plate. A positioning rod is fixedly connected to the side of the slide plate near the positioning frame. The positioning rod is slidably connected to the positioning frame. The end of the support rod away from the mounting block is fixedly connected to the middle of the slide plate. A connecting plate is fixedly connected to the upper end of the slide plate. A wedge block is fixedly connected to the end of the connecting plate away from the slide plate.

6. A gravity support device for a drawing die according to claim 4, characterized in that, A rack is fixedly connected to the upper end of the support rod near the support plate. A rotating rod is fixedly connected to the support plate near the support rod. A slot No. 1 is opened at the upper end of the support plate. A gear is fixedly connected to the middle of the rotating rod. The gear is located in the slot No. 1 and meshes with the rack.

7. A gravity support device for a drawing die according to claim 6, characterized in that, Symmetrical support rods are fixedly connected to the side of the support rod near the rotating rod. The upper end of the support rod is in contact with the support plate. Symmetrical moving grooves are opened in the upper part of the cavity. A second groove is opened on the side of the moving groove near the support plate. Adjusting columns are elastically connected to both ends of the rotating rod. The adjusting columns are rotatably connected in the second groove. An inclined surface is opened at the end of the adjusting column away from the support plate. Symmetrical movable rods are fixedly connected to both sides of the support plate. A horizontal groove and an arc-shaped groove are opened in the cavity to cooperate with the cavity.

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