Press machine with crank connecting rod mechanism

Abstract

The utility model discloses a press machine with a crank connecting rod mechanism. The press machine comprises a base, a first driving motor, a workbench fixed to the top of the base, an upper pressing plate arranged above the workbench and the crank connecting rod mechanism connected to an output shaft of the first driving motor. The first driving motor and the crank connecting rod mechanism are located below the workbench and installed on the base. The four corners of the upper pressing plate are fixedly connected with guide columns, and the guide columns extend downwards, penetrate through the workbench and are connected with a crank connecting rod mechanism. The first driving motor used for driving the upper pressing plate to ascend and descend and the crank connecting rod mechanism are arranged below the workbench, so that the gravity center of the press machine is effectively lowered, and the stability of the press machine is improved; the base is used for raising the workbench, the first driving motor and the crank connecting rod mechanism are installed on the base, the overall height of the press is effectively reduced, and space is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of presses, in particular to a press with a crank-connecting rod mechanism. Background Art

[0002] At present, most vertical presses are driven by hydraulics. The oil cylinder of the hydraulic press is at the top, which takes up a lot of space. During operation, the hydraulic pump needs to run all the time, which will always make a lot of noise. Since the hydraulic pump station and the hydraulic cylinder are connected by a hose, there is a risk of hydraulic oil leakage at the joint, so hydraulic presses are not suitable for places with high environmental requirements.

[0003] When the press presses food-grade materials, the hydraulic press has the risk of hydraulic oil leakage and contamination of the raw materials. Therefore, in the prior art, a mechanical press is usually used to press food-grade materials. A Chinese invention patent with announcement number CN104999013A once disclosed a crank press. In the crank press, the middle plate (i.e., the upper pressing plate) is arranged above the workbench, and the crank connecting rod mechanism and the motor are fixed on the press frame and placed above the middle plate. The center of gravity of the press is located in the middle and upper part of the press. The center of gravity is too high, resulting in low stability of the press during use. In addition, the press needs to raise the workbench so that the operator can place the mold and the material to be processed. The middle and upper part of the press is raised upward to place the crank connecting rod mechanism and the motor, and the middle and upper part of the press is raised downward to raise the workbench, so that the overall height of the press is too high and occupies a large space. Utility Model Content

[0004] The utility model aims to provide a press with a crank-connecting rod mechanism, which reduces the center of gravity of the press and the overall height of the press, improves the stability of the press and saves space.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A press with a crank-connecting rod mechanism comprises a base, a first drive motor, a workbench fixed on the top of the base, an upper pressing plate arranged above the workbench, and a crank-connecting rod mechanism connected to the output shaft of the first drive motor; the first drive motor and the crank-connecting rod mechanism are located below the workbench and installed on the base; guide columns are fixedly connected to the four corners of the upper pressing plate; the guide columns extend downward, pass through the workbench, and are connected to the crank-connecting rod mechanism.

[0007] The first drive motor and crank-connecting rod mechanism for driving the upper platen to rise and fall are arranged under the workbench, which effectively lowers the center of gravity of the press and improves the stability of the press; the base is used to raise the workbench, and the first drive motor and crank-connecting rod mechanism are installed on the base, which effectively lowers the overall height of the press and saves space.

[0008] As a further solution of the utility model, the base is a hollow structure, the first drive motor and the crank-connecting rod mechanism are placed inside the base, and the guide column extends into the base and is connected to the crank-connecting rod mechanism. The above solution effectively saves space.

[0009] As a further solution of the utility model, a bottom plate is connected between the guide column and the crank-connecting rod mechanism; the bottom plate is placed inside the base, and its four corners are fixedly connected to the guide column respectively, and its center is hinged to the crank-connecting rod mechanism. The above solution is adopted so that the first drive motor drives the bottom plate to be lifted and lowered more smoothly through the crank-connecting rod mechanism, thereby making the upper pressure plate be lifted and lowered more smoothly.

[0010] As a further solution of the utility model, a pin is arranged at the middle level of the bottom plate, the crank-connecting rod mechanism comprises a connecting rod whose lower end is hinged to the pin and a crank connected to the output shaft of the first drive motor, and the upper end of the connecting rod is hinged to the crank. The above solution is adopted to realize the transmission of the crank-connecting rod mechanism.

[0011] As a further solution of the utility model, a slide rail is fixed on the inner side wall of the base, a slider is fixed on the bottom plate, and the slider is assembled on the slide rail. The above solution is adopted to make the lifting of the base more stable, and then make the lifting of the upper pressure plate more stable.

[0012] As a further solution of the utility model, guide sleeves are fixedly installed at the four corners of the workbench, and the guide pillars pass through the guide sleeves and slide with the guide sleeves. The above solution is adopted to achieve sliding cooperation between the guide pillars and the workbench.

[0013] As a further solution of the utility model, the guide column is provided with an adjustment mechanism for adjusting the die height of the press. The above solution is adopted to expand the application range of the press to meet the different opening and closing strokes of different molds.

[0014] As a further solution of the utility model, the upper end of the guide column is a threaded rod, and the threaded rod passes through the upper pressing plate; the adjustment mechanism includes an upper nut and a lower nut, and the upper nut and the lower nut are respectively placed on the top and bottom of the upper pressing plate and are threadedly connected to the threaded rod. The above solution is adopted to realize the adjustment of the die height of the press.

[0015] As a further solution of the utility model, the upper end of the guide column is a threaded rod, and the threaded rod passes through the upper pressing plate; the adjustment mechanism includes small gears rotatably mounted on the four corners of the top of the upper pressing plate and a large gear rotatably mounted on the top of the upper pressing plate and meshing with the small gears, and the axial center hole of the small gear is threadedly connected to the threaded rod. The above solution is adopted to achieve the adjustment of the die height of the press. The above solution is adopted to indirectly drive the upper pressing plate to rise and fall by rotating the large gear, thereby achieving the adjustment of the die height of the press.

[0016] As a further solution of the utility model, the adjustment mechanism also includes a second drive motor for driving the large gear to rotate.

[0017] Beneficial effects of the utility model:

[0018] The first driving motor and the crank connecting rod mechanism for driving the upper pressing plate to move up and down are arranged below the workbench, which effectively lowers the center of gravity of the press and improves the stability of the press;

[0019] The base is used to raise the workbench, and the first drive motor and the crank-connecting rod mechanism are installed on the base, which effectively reduces the overall height of the press and saves space;

[0020] The base is a hollow structure, and the first drive motor and the crank connecting rod mechanism are placed in the base, which further saves space;

[0021] By adding an adjusting mechanism, the die height of the press can be adjusted, and the application range of the press can be expanded to meet the different opening and closing strokes of different molds. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings:

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0024] Figure 2 It is the front view of the utility model;

[0025] Figure 3 It is a partial cross-sectional view of the utility model;

[0026] Figure 4 It is a schematic diagram of the base and the workbench in the utility model;

[0027] Figure 5 It is a schematic diagram of the connection between the first drive motor and the crank-connecting rod mechanism in the utility model;

[0028] Figure 6 It is a schematic diagram of the inner cavity of the base in the utility model;

[0029] Figure 7 This is a schematic diagram of the guide column connecting the upper pressure plate and the bottom plate in the utility model (I);

[0030] Figure 8 This is a schematic diagram of the guide column connecting the upper pressure plate and the bottom plate in the utility model (II);

[0031] Fig. 9 It is a partial schematic diagram of the regulating mechanism in the utility model.

[0032] The accompanying drawings are marked as follows:

[0033] 1. Base; 11. Protective cover; 12. Slide rail; 2. Bottom plate; 21. Pin shaft; 22. Slider; 3. Workbench; 31. Guide sleeve; 4. Upper pressure plate; 5. Guide column; 51. Threaded rod; 6. First drive motor; 61. Bearing seat; 7. Crank-connecting rod mechanism; 71. Connecting rod; 72. Crank; 8. Adjustment mechanism; 81. Upper nut; 82. Lower nut; 83. Pinion; 84. Gear; 85. Second drive motor; 86. Transmission gear; 87. Fixed frame. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] Example 1

[0036] A press having a crank-connecting rod mechanism, such as Figure 1 to Figure 4 , Figure 7 As shown, it includes a base 1 with a hollow structure, a bottom plate 2 arranged inside the base 1, a workbench 3 fixed on the top of the base 1, and an upper pressing plate 4 arranged above the workbench 3. The four corners of the upper pressing plate 4 are fixedly connected with guide pillars 5. The four corners of the workbench 3 are respectively fixedly installed with guide sleeves 31. The guide pillars 5 extend downward, pass through the corresponding guide sleeves 31, slide with the guide sleeves 31, and extend into the interior of the base 1 to be fixedly connected with the four corners of the bottom plate 2. A first drive motor 6 and a crank-connecting rod mechanism 7 located below the workbench 3 are installed on the base 1. The output shaft of the first drive motor 6 drives the bottom plate 2 to rise and fall through the crank-connecting rod mechanism 7.

[0037] like Figure 3 and Figure 5As shown, the output shaft of the first drive motor 6 is installed at the bottom of the workbench 3 through the bearing seat 61. The crank-connecting rod mechanism 7 is located between the workbench 3 and the base plate 2. The crank-connecting rod mechanism 7 includes a connecting rod 71 whose lower end is hinged to the pin 21 and a crank 72 connected to the output shaft of the first drive motor 6. The upper end of the connecting rod 71 is hinged to the crank 72. Specifically, the output shaft of the first drive motor 6 drives the crank 72 to rotate, the crank 72 drives the base plate 2 to rise and fall through the connecting rod 71, and the base plate 2 drives the upper pressing plate 4 to rise and fall through the guide column 5.

[0038] In this embodiment, a protective cover 11 for covering the first driving motor 6 is provided on the outer wall of the base 1 .

[0039] In this embodiment, Figure 3 and Figure 7 As shown, a pin 21 is horizontally arranged at the center of the bottom plate 2, and a connecting rod 71 is hinged to the pin 21. The first drive motor 6 drives the center of the bottom plate 2 through a crank connecting rod mechanism 7, so that the bottom plate 2 is lifted and lowered more smoothly, thereby making the upper pressing plate 4 lift and lower more smoothly.

[0040] Further, such as Figure 6 and Figure 7 As shown, a slide rail 12 is fixed on the inner side wall of the base 1, and the slide rail 12 extends in the up-down direction. A slider 22 is fixed on the bottom plate 2, and the slider 22 is assembled on the slide rail 12 to guide the bottom plate 2. In this embodiment, there are four slide rails 12, and they are distributed near the four corners of the bottom plate 2. The slider 22 is fixed on the top of the bottom plate 2.

[0041] Different molds have different opening and closing strokes. Therefore, in order to expand the use range of the press, the press is also provided with an adjustment mechanism 8 to adjust the mold height of the press, that is, to adjust the relative distance between the upper platen 4 and the bottom plate 2, so as to meet the height requirements of different molds.

[0042] Specifically, Figure 2 As shown, the upper end of the guide column 5 is a threaded rod 51. Through holes for the threaded rod 51 to pass through are provided on the four corners of the upper pressing plate 4. The threaded rod 51 passes through the corresponding through holes. The adjustment mechanism 8 includes an upper nut 81 and a lower nut 82 threadedly connected to the threaded rod 51. The upper nut 81 and the lower nut 82 are respectively placed on the top and the bottom of the upper pressing plate 4, thereby fixing the upper pressing plate 4. When the die height of the press needs to be adjusted, the positions of the upper nut 81 and the lower nut 82 on the threaded rod 51 are adjusted, thereby adjusting the relative distance between the upper pressing plate 4 and the bottom plate 2.

[0043] The working principle of this press is as follows:

[0044] Before use, the relative distance between the upper pressing plate 4 and the bottom plate 2 is adjusted by the adjusting mechanism 8 to match the mold to be used;

[0045] The lower mold of the mold is assembled on the top of the workbench 3, and the upper mold of the mold is assembled on the bottom of the upper pressing plate 4;

[0046] The material to be processed is placed in the lower mold, and the output shaft of the first drive motor 6 rotates forward, driving the crank 72 to rotate, and the crank 72 drives the bottom plate 2 to move downward through the connecting rod 71, and the bottom plate 2 drives the upper pressing plate 4 to move downward through the guide column 5, thereby realizing the mold closing movement;

[0047] Thereafter, the output shaft of the first drive motor 6 rotates in the reverse direction, indirectly driving the bottom plate 2 to move upward, and the bottom plate 2 drives the upper pressing plate 4 to move upward through the guide pillars 5, thereby realizing the mold opening movement of the mold.

[0048] In this embodiment, the first drive motor 6 and the crank-connecting rod mechanism 7 for driving the upper platen 4 to rise and fall are arranged below the workbench 3, which effectively lowers the center of gravity of the press and improves the stability of the press; the base 1 is used to raise the workbench 3, and the first drive motor 6 and the crank-connecting rod mechanism 7 are installed on the base 1, which effectively lowers the overall height of the press and saves space; the adjustment mechanism 8 is used to adjust the mold loading height of the press, thereby expanding the application range of the press to meet the different opening and closing strokes of different molds.

[0049] Example 2

[0050] The difference between this embodiment and the first embodiment is that the structure of the adjustment mechanism 8 is different.

[0051] like Figure 8-Figure 9 As shown, the adjustment mechanism 8 is mounted on the upper pressing plate 4, and includes four pinions 83 rotatably mounted at the four corners of the top of the upper pressing plate 4 and a large gear 84 rotatably mounted at the top center of the upper pressing plate 4 and respectively meshing with the four pinions 83. The axial center hole of the pinion 83 is threadedly connected to the threaded rod 51.

[0052] Furthermore, the adjustment mechanism 8 also includes a second drive motor 85 for driving the large gear 84 to rotate. The second drive motor 85 is installed on the top of the upper platen 4 through a fixing bracket 87, and the output end of the second drive motor 85 is fixedly connected to a transmission gear 86 meshing with the large gear 84.

[0053] The four corners of the upper platen 4 are respectively threadedly connected to the corresponding threaded rod 51 through the pinion gear 83. When the die height of the press needs to be adjusted, the output end of the second drive motor 85 drives the transmission gear 86 to rotate, and the transmission gear 86 drives the large gear 84 to rotate, and the large gear 84 synchronously drives the four pinions 83 to rotate on the corresponding threaded rod 51, and then synchronously drives the four corners of the upper platen 4 to rise and fall, that is, the upper platen 4 is lifted and lowered as a whole. When the upper platen 4 moves to a suitable position, the output end of the second drive motor 85 stops rotating, that is, the upper platen 4 is effectively fixed on the threaded rod 51.

[0054] This embodiment utilizes the transmission between gears to adjust the height of the upper pressing plate 4, thereby adjusting the die height of the press, and the operation is simple.

[0055] The above is a detailed description of two embodiments of the utility model, but the contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of patent protection of the utility model.

Claims

1. A press machine with a crank-connecting rod mechanism, comprising a base (1), a first drive motor (6), a workbench (3) fixed on the top of the base (1), an upper pressing plate (4) arranged above the workbench (3), and a crank-connecting rod mechanism (7) connected to an output shaft of the first drive motor (6), characterized in that: The first drive motor (6) and the crank-connecting rod mechanism (7) are located below the workbench (3) and are mounted on the base (1); the four corners of the upper pressure plate (4) are fixedly connected with guide pillars (5); the guide pillars (5) extend downward, pass through the workbench (3), and are connected to the crank-connecting rod mechanism (7).

2. The press according to claim 1, characterized in that The base (1) is a hollow structure, the first drive motor (6) and the crank-connecting rod mechanism (7) are placed inside the base (1), and the guide column (5) extends into the base (1) and is connected to the crank-connecting rod mechanism (7).

3. The press according to claim 2, characterized in that A base plate (2) is connected between the guide column (5) and the crank-connecting rod mechanism (7); the base plate (2) is placed inside the base (1), and its four corners are respectively fixedly connected to the guide column (5), and its center is hinged to the crank-connecting rod mechanism (7).

4. The press according to claim 3, characterized in that A pin shaft (21) is arranged at the middle level of the base plate (2), and the crank-connecting rod mechanism (7) comprises a connecting rod (71) whose lower end is hinged to the pin shaft (21) and a crank (72) connected to the output shaft of the first drive motor (6), and the upper end of the connecting rod (71) is hinged to the crank (72).

5. The press according to claim 3, characterized in that A slide rail (12) is fixed on the inner side wall of the base (1), a slider (22) is fixed on the bottom plate (2), and the slider (22) is assembled on the slide rail (12).

6. The press according to claim 1, characterized in that A guide sleeve (31) is fixedly mounted on each of the four corners of the workbench (3), and the guide column (5) passes through the guide sleeve (31) and is slidably matched with the guide sleeve (31).

7. The press according to claim 1, characterized in that The guide column (5) is provided with an adjusting mechanism (8) for adjusting the die height of the press.

8. The press according to claim 7, characterized in that The upper end of the guide column (5) is a threaded rod (51), and the threaded rod (51) passes through the upper pressure plate (4); the adjustment mechanism (8) comprises an upper nut (81) and a lower nut (82), and the upper nut (81) and the lower nut (82) are respectively placed on the top and bottom of the upper pressure plate (4) and are threadedly connected to the threaded rod (51).

9. The press according to claim 7, characterized in that The upper end of the guide column (5) is a threaded rod (51), and the threaded rod (51) passes through the upper pressure plate (4); the adjustment mechanism (8) includes small gears (83) rotatably mounted on the four corners of the top of the upper pressure plate (4) and a large gear (84) rotatably mounted on the top of the upper pressure plate (4) and meshing with the small gears (83), and the axial center hole of the small gear (83) is threadedly connected to the threaded rod (51).

10. The press according to claim 9, characterized in that The adjustment mechanism (8) also includes a second drive motor (85) for driving the large gear (84) to rotate.

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