Crank slider pressure holding device for mechanical press

Abstract

The application discloses a crank slider pressure holding device of a mechanical press, and relates to the technical field of mechanical presses, which comprises a machine body, a transmission part, a traction part and an opening and closing part. The machine body comprises a workbench and guide rods fixedly connected vertically on the workbench. Upper and lower pressure plates are connected to the guide rods in a vertical sliding mode. A driving part is arranged in the machine body. The output side of the driving part is connected to the upper pressure plate. The transmission part is connected between the machine body and the input side of the driving part to drive the upper and lower pressure plates to move vertically along the guide rods in an axial direction. The upper and lower pressure plates are arranged to apply pressure to a workpiece. The opening and closing part and the traction part are arranged to keep the lower pressure plate on the workpiece to continuously apply pressure when the upper pressure plate moves to the lowest point and returns, so as to prevent the pressure applied to the workpiece from weakening when the upper pressure plate moves away from the workpiece, thereby ensuring that the workpiece obtains sufficient pressing force in the forming process.

Description

Technical Field

[0001] This invention relates to the field of mechanical press technology, and in particular to a crank-slider pressure holding and maintaining device for a mechanical press. Background Technology

[0002] Mechanical presses are forging and pressing machines driven by crank-connecting rod or elbow mechanism, cam mechanism, or screw mechanism. They are machine tools used to process materials by applying strong pressure to the blank to deform and fracture it into parts. They are characterized by stable operation, high precision, good operating conditions, high productivity, and easy mechanization and automation. They are suitable for operation on automatic lines and are widely used in industrial machinery presses in automobiles, ships, and other industries.

[0003] The crank-slider is a key component in a mechanical press. It converts the rotational motion of the crank into the linear motion of the slider. The crank eccentricity is usually fixed. When the crank drives the connecting rod and the lower platen during the stamping process, the slider will quickly move upward and reset after reaching the lowest point. At this time, the pressure of the lower platen on the workpiece will drop instantly and weaken as the distance increases, which cannot guarantee that the workpiece will receive sufficient pressing force during the forming process. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the above and / or existing mechanical press crank-slider pressure holding device, the present invention is proposed.

[0006] Therefore, the problem to be solved by the present invention is how to solve the problem that the existing slider will quickly move upward and reset after reaching the lowest point. At this time, the pressure of the pressing part on the workpiece will drop instantly and weaken as the distance increases, which cannot guarantee that the workpiece will obtain sufficient pressing force during the forming process.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a crank-slider pressure holding device for a mechanical press, comprising a body, a transmission component, a traction component, and an opening / closing component. The body includes a worktable and a guide rod vertically fixedly connected to the worktable. An upper pressure plate and a lower pressure plate are vertically slidably connected to the guide rod. A driving component is provided inside the body. The output side of the driving component is connected to the upper pressure plate. The transmission component is connected between the body and the input side of the driving component to drive the upper and lower pressure plates to move vertically along the axial direction of the guide rod. The traction component includes a vertical plate and a gear segment. The gear segment is vertically disposed on the vertical plate. The opening / closing component includes a connecting arm and a one-way bearing mounted on the connecting arm. A driving gear coaxially fixedly connected to the one-way bearing and cooperating with the gear segment is fixedly connected to the one-way bearing. One end of the connecting arm is rotatably connected to the side of the upper pressure plate, and the other end of the connecting arm is horizontally slidably connected to the side of the lower pressure plate.

[0008] As a preferred embodiment of the crank-slider pressure holding and maintaining device for a mechanical press according to the present invention, the opening and closing member further includes a receiving groove formed on the outer wall of the lower pressure plate, and a connecting rod fixedly connected inside the receiving groove. A guide slider is axially elastically slidable on the connecting rod, and a limit rod is fixedly connected to the guide slider. The limit rod is rotatably connected to one end of the connecting arm, and one end of the limit rod cooperates with the traction member.

[0009] As a preferred embodiment of the mechanical press crank slider holding and retaining device of the present invention, the opening and closing component further includes a spring, which is fixedly connected between the guide slider and the receiving groove and sleeved on the surface of the connecting rod.

[0010] As a preferred embodiment of the crank-slider holding and retaining device for a mechanical press according to the present invention, the opening and closing component further includes a main shaft, which is fixedly connected to the connecting arm and rotatably connected to the inside of the upper pressure plate. The two symmetrical connecting arms on the upper pressure plate are connected by the same main shaft.

[0011] As a preferred embodiment of the crank-slider pressure holding and maintaining device for a mechanical press according to the present invention, the traction member further includes a vertical groove section, a horizontal groove section, and an inclined groove section formed on the vertical plate. The end of the vertical groove section is connected to the beginning of the horizontal groove section, the end of the horizontal groove section is connected to the beginning of the inclined groove section, and the end of the inclined groove section is connected to the vertical groove section. One end of the limiting rod is slidably connected inside the vertical groove section, the horizontal groove section, and the inclined groove section.

[0012] As a preferred embodiment of the mechanical press crank-slider holding and retaining device of the present invention, the traction member further includes a smooth section, and the smooth section and the gear tooth section are located on the same straight line.

[0013] As a preferred embodiment of the mechanical press crank slider holding and retaining device of the present invention, wherein: a side baffle is fixedly connected to the side of the lower pressure plate by bolts, the side baffle is in a vertical state, and the height of the side baffle is greater than or equal to the maximum distance between the upper pressure plate and the lower pressure plate.

[0014] In a preferred embodiment of the mechanical press crank slider holding and retaining device of the present invention, a rubber anti-collision block is fixedly connected to the top surface of the lower pressure plate, and the top surface of the rubber anti-collision block is in contact with the bottom surface of the upper pressure plate.

[0015] As a preferred embodiment of the crank-slider holding and retaining device for a mechanical press according to the present invention, the driving component includes a crankshaft rotatably connected to the machine body and a swing arm rotatably connected to the eccentric shaft of the crankshaft, the bottom end of the swing arm being rotatably connected to the upper pressure plate.

[0016] In a preferred embodiment of the crank-slider holding and retaining device for a mechanical press according to the present invention, the transmission component includes a motor mounted on the machine body and a second synchronous pulley keyed to the output shaft of the motor. A first synchronous pulley is keyed to the input shaft of the crankshaft, and a synchronous belt connects the first synchronous pulley and the second synchronous pulley.

[0017] The beneficial effects of this invention are: This invention features an upper pressure plate and a lower pressure plate that jointly apply pressure to the workpiece. Through the design of the opening and closing mechanism and the traction mechanism, when the upper pressure plate moves to the lowest point and returns, the lower pressure plate remains on the workpiece and continues to apply pressure. This prevents the pressure on the workpiece from weakening when the upper pressure plate moves away from the workpiece, thereby ensuring that the workpiece receives sufficient pressing force during the forming process. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the main structure of a crank-slider pressure holding and retaining device for a mechanical press.

[0020] Figure 2 This is a schematic diagram of the internal structure of a crank-slider pressure holding and retaining device for a mechanical press.

[0021] Figure 3 This is a schematic diagram of the main structure of the transmission component in a crank-slider pressure holding device for a mechanical press.

[0022] Figure 4 This is a schematic diagram of the main structure of the driving component in a crank-slider pressure holding device for a mechanical press.

[0023] Figure 5 This is a schematic diagram of the main structure of the opening and closing component in a crank-slider pressure holding device for a mechanical press.

[0024] Figure 6 This is a schematic diagram of the upper and lower pressure plates after they are opened in a crank-slider pressure holding device for a mechanical press.

[0025] Figure 7 This is a schematic diagram of the main structure of the vertical plate in a crank-slider pressure holding device for a mechanical press.

[0026] In the diagram: 1. Machine body; 11. Worktable; 12. Guide rod; 2. Transmission component; 21. First synchronous pulley; 22. Synchronous belt; 23. Motor; 24. Second synchronous pulley; 3. Drive component; 31. Crankshaft; 32. Swing arm; 4. Upper pressure plate; 5. Traction component; 51. Vertical plate; 52. Smooth section; 53. Gear tooth section; 54. Vertical groove section; 55. Horizontal groove section; 56. Inclined groove section; 6. Lower pressure plate; 61. Side baffle; 62. Rubber anti-collision block; 7. Opening and closing component; 71. Main shaft; 72. Connecting arm; 73. Guide slider; 74. Limiting rod; 75. Connecting rod; 76. Spring; 77. Drive gear; 78. One-way bearing; 79. Receiving groove. Detailed Implementation

[0027] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0030] Example 1, referring to Figures 1 to 4This is the first embodiment of the present invention, which provides a crank-slider pressure holding device for a mechanical press, including a body 1, a transmission component 2, a traction component 5, and an opening / closing component 7. The body 1 includes a worktable 11 and a guide rod 12 vertically fixedly connected to the worktable 11. An upper pressure plate 4 and a lower pressure plate 6 are vertically slidably connected to the guide rod 12. A driving component 3 is provided inside the body 1. The output side of the driving component 3 is connected to the upper pressure plate 4. The transmission component 2 is connected between the body 1 and the input side of the driving component 3. The upper pressure plate 4 and the lower pressure plate 6 are driven to move vertically along the axial direction of the guide rod 12. The traction component 5 includes a vertical plate 51 and a gear tooth segment 53. The gear tooth segment 53 is vertically arranged on the vertical plate 51. The opening and closing component 7 includes a connecting arm 72 and a one-way bearing 78 mounted on the connecting arm 72. A drive gear 77 that cooperates with the gear tooth segment 53 is coaxially fixedly connected to the one-way bearing 78. One end of the connecting arm 72 is rotatably connected to the side of the upper pressure plate 4, and the other end of the connecting arm 72 is horizontally slidably connected to the side of the lower pressure plate 6.

[0031] Specifically, the drive component 3 includes a crankshaft 31 rotatably connected to the body 1, and a rocker arm 32 rotatably connected to the eccentric shaft of the crankshaft 31. The bottom end of the rocker arm 32 is rotatably connected to the upper pressure plate 4. The transmission component 2 includes a motor 23 mounted on the body 1, and a second synchronous pulley 24 keyed to the output shaft of the motor 23. A first synchronous pulley 21 is keyed to the input shaft of the crankshaft 31, and a synchronous belt 22 connects the first synchronous pulley 21 and the second synchronous pulley 24.

[0032] Among them, the motor 23 drives the second synchronous pulley 24 to rotate, and the second synchronous pulley 24 drives the first synchronous pulley 21 to rotate through the synchronous belt 22. After deceleration, the first synchronous pulley 21 drives the crankshaft 31 to rotate continuously. When the crankshaft 31 rotates, it can drive the upper pressure plate 4 to reciprocate vertically on the guide rod 12 through the swing arm 32, so as to realize the stamping of the workpiece.

[0033] Specifically, initially, the upper pressure plate 4 can drive the lower pressure plate 6 to move downwards together. Therefore, the workpiece is actually stamped by the lower pressure plate 6. When the upper pressure plate 4 and the lower pressure plate 6 move vertically to the lowest point, the pressure applied to the workpiece by the lower pressure plate 6 is at its maximum. When the upper pressure plate 4 returns to its original position, the pressure of the lower pressure plate 6 on the workpiece gradually weakens. In this embodiment, when the upper pressure plate 4 moves downwards, it can drive the drive gear 77 to move downwards synchronously through the one-way bearing 78. Before descending to the lowest point, the drive gear 77 will mesh with the gear tooth segment 53. Due to the characteristics of the one-way bearing 78, the drive gear 77 can rotate on the one-way bearing 78. When the upper pressure plate 4 returns to its original position, the upper pressure plate 4 will drive the lower pressure plate 6 to move downwards through the one-way bearing 78. As the drive gear 77 moves upward, due to the characteristics of the one-way bearing 78, the drive gear 77 can drive one end of the connecting arm 72 to rotate through the one-way bearing 78, so that the other end of the connecting arm 72 revolves. However, since the other end of the connecting arm 72 is horizontally slidably connected to the side of the lower pressure plate 6, and the upper pressure plate 4 is constantly moving upward, the lower pressure plate 6 remains stationary and can continuously apply pressure to the workpiece. The upper pressure plate 4 has already moved upward a certain distance, but since the connecting arm 72 can squeeze the lower pressure plate 6 through the reverse force in the vertical direction after rotation, it can further squeeze the workpiece through the lower pressure plate 6 to ensure that the workpiece obtains sufficient pressing force during the forming process.

[0034] It should be understood that in this embodiment, the one-way bearing 78 can rotate when the upper pressure plate 4 moves downward, but cannot rotate when the upper pressure plate 4 moves upward. The specific internal structure and working principle of the one-way bearing 78 are technical means well known to those skilled in the art, and will not be described in detail here.

[0035] Example 2, please refer to Figures 5 to 7 This is the second embodiment of the present invention.

[0036] In this embodiment, the opening and closing component 7 further includes a receiving groove 79 formed on the outer wall of the lower pressure plate 6, and a connecting rod 75 fixedly connected inside the receiving groove 79. A guide slider 73 is axially elastically slidable on the connecting rod 75. A limiting rod 74 is fixedly connected to the guide slider 73. The limiting rod 74 is rotatably connected to one end of the connecting arm 72. One end of the limiting rod 74 cooperates with the traction component 5. The opening and closing component 7 also includes a spring 76, which is fixedly connected between the guide slider 73 and the receiving groove 79 and sleeved on the surface of the connecting rod 75. The opening and closing component 7 also includes a main shaft 71, which is fixedly connected to the connecting arm 72 and rotatably connected inside the upper pressure plate 4. The two symmetrical connecting arms 72 on the upper pressure plate 4 are connected by the same main shaft 71.

[0037] Specifically, when the upper pressure plate 4 moves downward, the drive gear 77 contacts the tooth segment 53 and drives the one-way bearing 78 to rotate. Therefore, the connecting arm 72 does not rotate at this time. When the upper pressure plate 4 moves upward, the drive gear 77 contacts the tooth segment 53 and drives the main shaft 71 to rotate through the one-way bearing 78. This causes the main shaft 71 to drive the connecting arm 72 to rotate, and the connecting arm 72 drives the guide slider 73 at the other end to revolve. However, since the guide slider 73 is slidably connected in the horizontally opened receiving groove 79, and the upper pressure plate 4 is constantly moving upward, the connecting arm 72 can drive the guide slider 73 to move horizontally inside the receiving groove 79 and compress the spring 76 to store energy. After the drive gear 77 separates from the tooth segment 53, the spring 76 releases energy to drive the connecting arm 72 to reset, which in turn causes the connecting arm 72 to drive the lower pressure plate 6 to reset, so that the lower pressure plate 6 can move closer to the upper pressure plate 4 again.

[0038] The traction component 5 also includes a vertical groove section 54, a horizontal groove section 55, and an inclined groove section 56 formed on the upright plate 51. The end of the vertical groove section 54 is connected to the beginning of the horizontal groove section 55, the end of the horizontal groove section 55 is connected to the beginning of the inclined groove section 56, and the end of the inclined groove section 56 is connected to the vertical groove section 54. One end of the limiting rod 74 is slidably connected inside the vertical groove section 54, the horizontal groove section 55, and the inclined groove section 56. The traction component 5 also includes a smooth section 52, and the smooth section 52 and the toothed section 53 are located on the same straight line.

[0039] Specifically, during the above process, the guide slider 73 always drives the limiting rod 74 to move synchronously. The limiting rod 74 and the connecting arm 72 are rotatably connected, so the normal rotation of the connecting arm 72 is not affected. During the descent of the upper pressure plate 4, one end of the limiting rod 74 moves in the vertical groove section 54. When the upper pressure plate 4 drives the lower pressure plate 6 to the lowest point, one end of the limiting rod 74 is located at the beginning of the horizontal groove section 55. When the connecting arm 72 rotates, one end of the connecting arm 72 drives the guide slider 73 to move in the receiving groove 79, thereby allowing one end of the limiting rod 74 to move along the horizontal groove section 55. Since the horizontal groove section 55 is horizontally distributed, even if the upper pressure plate 4 is in an upward state, it will not affect the lower pressure plate 74. The pressure plate 6 is in a vertical position until one end of the limiting rod 74 moves to the starting end of the inclined groove section 56. At this time, the lower pressure plate 6 ends its continuous pressure on the workpiece. When the upper pressure plate 4 moves upward to reset, it moves upward together with the upper pressure plate 4. The limiting rod 74 moves along the inclined groove section 56. The inclined direction of the inclined groove section 56 can generate a thrust in the horizontal direction of the limiting rod 74. At the same time, with the storage capacity of the spring 76, the lower pressure plate 6 can quickly close the distance between itself and the upper pressure plate 4, so that the upper pressure plate 4 and the lower pressure plate 6 are relatively reset. Finally, with the cooperation of the transmission component 2 and the driving component 3, the upper pressure plate 4 and the lower pressure plate 6 are reset as a whole. At this time, one end of the limiting rod 74 has disengaged from the inclined groove section 56 and returned to the starting end of the vertical groove section 54.

[0040] Specifically, a side baffle 61 is fixedly connected to the side of the lower pressure plate 6 by bolts. The side baffle 61 is in a vertical state, and the height of the side baffle 61 is greater than or equal to the maximum distance between the upper pressure plate 4 and the lower pressure plate 6.

[0041] Since there will be relative movement between the upper pressure plate 4 and the lower pressure plate 6, in order to prevent the gap between the upper pressure plate 4 and the lower pressure plate 6 from causing safety hazards during actual operation, this embodiment adds a side baffle 61 to the side of the lower pressure plate 6 to prevent the worker's hand from reaching into the gap between the upper pressure plate 4 and the lower pressure plate 6. Even if the distance between the upper pressure plate 4 and the lower pressure plate 6 is at its maximum, the height of the gap will not exceed the height of the side baffle 61, so as to achieve the best protection effect.

[0042] Specifically, a rubber anti-collision block 62 is fixedly connected to the top surface of the lower pressure plate 6, and the top surface of the rubber anti-collision block 62 is in contact with the bottom surface of the upper pressure plate 4.

[0043] Due to the elastic force of the spring 76 and the lateral thrust of the inclined groove section 56 on the limiting rod 74, the lower pressure plate 6 can quickly reset below the upper pressure plate 4. In order to prevent the collision between the upper pressure plate 4 and the lower pressure plate 6 from reducing the service life, a rubber anti-collision block 62 is added between the upper pressure plate 4 and the lower pressure plate 6 in this embodiment to achieve the function of shock absorption and buffering.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A crank-slider pressure holding and retaining device for a mechanical press, characterized in that, include: The machine body (1) includes a worktable (11) and a guide rod (12) vertically fixed on the worktable (11). An upper pressure plate (4) and a lower pressure plate (6) are vertically slidably connected on the guide rod (12). A driving component (3) is provided inside the machine body (1). The output side of the driving component (3) is connected to the upper pressure plate (4). Transmission component (2), which is connected between the machine body (1) and the input side of the drive component (3) to drive the upper pressure plate (4) and the lower pressure plate (6) to move vertically along the axial direction of the guide rod (12); The traction component (5) includes a vertical plate (51) and a toothed section (53), the toothed section (53) being vertically arranged on the vertical plate (51); as well as The opening and closing component (7) includes a connecting arm (72) and a one-way bearing (78) mounted on the connecting arm (72). A drive gear (77) that cooperates with the gear tooth segment (53) is coaxially fixedly connected to the one-way bearing (78). One end of the connecting arm (72) is rotatably connected to the side of the upper pressure plate (4), and the other end of the connecting arm (72) is horizontally slidably connected to the side of the lower pressure plate (6).

2. The crank-slider pressure-holding device for a mechanical press according to claim 1, characterized in that, The opening and closing component (7) also includes a receiving groove (79) formed on the outer side wall of the lower pressure plate (6), and a connecting rod (75) fixedly connected inside the receiving groove (79). A guide slider (73) is axially elastically slidable on the connecting rod (75). A limiting rod (74) is fixedly connected on the guide slider (73). The limiting rod (74) is rotatably connected to one end of the connecting arm (72). One end of the limiting rod (74) cooperates with the traction component (5).

3. The crank-slider pressure-holding device for a mechanical press according to claim 2, characterized in that, The opening and closing component (7) also includes a spring (76), which is fixedly connected between the guide slider (73) and the receiving groove (79) and sleeved on the surface of the connecting rod (75).

4. The crank-slider pressure-holding device for a mechanical press according to claim 2, characterized in that, The opening and closing component (7) also includes a main shaft (71), which is fixedly connected to the connecting arm (72). The main shaft (71) is rotatably connected to the inside of the upper pressure plate (4). The two symmetrical connecting arms (72) on the upper pressure plate (4) are connected by the same main shaft (71).

5. The crank-slider pressure-holding device for a mechanical press according to claim 2, characterized in that, The traction component (5) further includes a vertical groove (54), a horizontal groove (55), and an inclined groove (56) formed on the upright plate (51). The end of the vertical groove (54) is connected to the beginning of the horizontal groove (55), the end of the horizontal groove (55) is connected to the beginning of the inclined groove (56), and the end of the inclined groove (56) is connected to the vertical groove (54). One end of the limiting rod (74) is slidably connected inside the vertical groove (54), the horizontal groove (55), and the inclined groove (56).

6. The crank-slider pressure-holding device for a mechanical press according to claim 1, characterized in that, The traction component (5) also includes a smooth section (52), which and the tooth section (53) are located on the same straight line.

7. The crank-slider pressure-holding device for a mechanical press according to claim 1, characterized in that, The side of the lower pressure plate (6) is fixedly connected to a side baffle (61) by bolts. The side baffle (61) is in a vertical state, and the height of the side baffle (61) is greater than or equal to the maximum distance between the upper pressure plate (4) and the lower pressure plate (6).

8. The crank-slider pressure-holding device for a mechanical press according to claim 7, characterized in that, A rubber anti-collision block (62) is fixedly connected to the top surface of the lower pressure plate (6), and the top surface of the rubber anti-collision block (62) is in contact with the bottom surface of the upper pressure plate (4).

9. A crank-slider pressure-holding device for a mechanical press according to claim 1, characterized in that, The drive unit (3) includes a crankshaft (31) rotatably connected to the body (1) and a swing arm (32) rotatably connected to the eccentric shaft of the crankshaft (31), the bottom end of the swing arm (32) being rotatably connected to the upper pressure plate (4).

10. A crank-slider pressure-holding device for a mechanical press according to claim 9, characterized in that, The transmission component (2) includes a motor (23) mounted on the body (1) and a second synchronous pulley (24) keyed to the output shaft of the motor (23). A first synchronous pulley (21) is keyed to the input shaft of the crankshaft (31), and a synchronous belt (22) is connected between the first synchronous pulley (21) and the second synchronous pulley (24).

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