Fixed axis planetary gear driven slide return type multi-screw super large size screw press

Abstract

A fixed-axis planetary gear driven slider return type multi-screw super-large screw press, including an upper body in the body, characterized in that: the upper body is connected to the lower part of the main shaft through a force amplification mechanism, and the lower part of the main shaft is installed on the upper body; the upper part of the main shaft is installed with a slider return mechanism, a flywheel, and a friction clutch in sequence; the slider return mechanism is close to the upper body and is located at the lower side of the main shaft, the friction clutch is located at the upper side of the main shaft, and the flywheel is located in the middle of the main shaft; the flywheel and the friction clutch form a whole in structure; the friction clutch and the slider return mechanism are both connected to the hydraulic pipeline system; the present invention has the advantages of small screw diameter, easy manufacturing, high load-bearing capacity, strong anti-eccentric load ability, large working surface, high efficiency, good reliability, high energy utilization, and convenient replacement and maintenance of clutch friction materials.

Description

Technical Field

[0001] The invention belongs to the technical field of screw presses for forging equipment, and in particular relates to a fixed-axis planetary gear driven slider return type multi-screw super-large screw press. Background Art

[0002] A screw press is a die forging process equipment that uses a screw working mechanism to convert the energy of a transmission device into useful work. Depending on the driving method, it can be roughly divided into four categories: friction screw presses, hydraulic screw presses, electric screw presses, and clutch screw presses. Among them, the clutch screw press breaks through the traditional screw press's flywheel's forward and reverse rotation movement mode, and the structural form in which the screw and flywheel are connected as an integral whole. The rotation direction is single and the speed is basically constant. A hydraulic clutch is installed between the flywheel and the screw, and the engagement or disengagement of the clutch is controlled by hydraulic pressure. Its working principle is as follows: when the press is working, the main motor drives the flywheel to reach the rated speed and then rotates continuously in one direction. When the workpiece needs to be forged, the control system adjusts the clutch oil inlet pressure through the proportional pressure reducing valve according to the user-set parameters and injects oil. After the clutch is injected with oil, the hydraulic cylinder presses the friction block, so that the flywheel quickly combines with the friction disk on the screw through the friction block, connecting the flywheel and the screw, and driving the slider to move downward at a certain speed to strike the forging; after the striking is completed, the clutch quickly drains the oil and disengages, and the flywheel is immediately separated from the screw; driven by the left and right return cylinders and the rebound force of the fuselage, the slider returns. Before the slider returns to the top dead center, the slider damping brake valve works to stop it steadily at the top dead center, and a striking cycle ends.

[0003] Traditional screw presses commonly suffer from the following shortcomings: 1) Large-tonnage screw presses require mastery of large screw component material composition ratios and large-scale thread processing technology. Furthermore, the large screw diameter makes hoisting, transportation, and manufacturing difficult, hindering their development. Due to the single-screw structure, multi-die forging can result in unbalanced loads, which can significantly impact the screw and affect part precision. 2) After the working stroke is completed, a traditional screw press uses piston rods within large, symmetrically arranged cylinders to pull the slide and die upward for the return stroke. This requires a specialized, high-power hydraulic power supply and control system, resulting in low energy efficiency, complex structure, and poor reliability. 3) In traditional screw presses, the clutch friction material, enclosed within the flywheel housing, and the clutch drive hydraulic cylinder, located in a heavy, disc-shaped housing above the flywheel, are difficult to disassemble and replace, making maintenance inconvenient. 4) In traditional screw presses, both the active and passive friction plates of the clutch are enclosed within the flywheel housing. This prevents the effective dissipation of friction heat generated by the engagement of the friction plates during clutch operation. This can easily lead to friction material failure due to poor heat dissipation, reducing clutch reliability. 5) The tension bolt assembly fuselage and its overall fuselage structure are bulky, difficult to manufacture, and expensive. Summary of the Invention

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a fixed-axis planetary gear driven slider return type multi-screw extra-large specification screw press, which has the advantages of small screw diameter, easy manufacturing, high load-bearing capacity, strong anti-eccentric load ability, large work surface, high efficiency, good reliability, high energy utilization, and easy replacement and maintenance of clutch friction material.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A fixed-axis planetary gear-driven slider return type multi-screw super-large screw press includes an upper body 37 in the body, the upper body 37 is connected to the lower part of the main shaft 21 through a force amplification mechanism, and the lower part of the main shaft 21 is mounted on the upper body 37; the upper part of the main shaft 21 is sequentially mounted with a slider return mechanism, a flywheel 4, and a friction clutch; the slider return mechanism is close to the upper body 37 and is located at the lower side of the main shaft 21, the friction clutch is located at the upper side of the main shaft 21, and the flywheel 4 is located in the middle of the main shaft 21; the flywheel 4 and the friction clutch form a whole in structure; the friction clutch and the slider return mechanism are both connected to the hydraulic pipeline system.

[0007] The fuselage includes an upper fuselage 37, a lower fuselage 38, an upper crossbeam 39, a column 40 and a lower crossbeam 41. The three upper crossbeams 39, the upper crossbeam 39 and the column 40, the column 40 and the lower crossbeam 41, the three lower crossbeams 41, the upper crossbeam 39 and the upper fuselage 37, and the lower crossbeam 41 and the lower fuselage 38 are all connected by connecting plates 42. The overall fuselage strength and rigidity are increased by wrapping steel wire between the upper crossbeam 39, the column 40 and the lower crossbeam 41.

[0008] The force amplification mechanism includes four first screws 46 connected to the upper fuselage 37. The lower part of the first screw 46 forms a spiral fit with the nut 47. The nut 47 is embedded in the slider 48, and the slider 48 is guided by a guide rail 49 installed on the column 40; a gear 45 is installed on the upper part of the first screw 46, and the gear 45 is engaged with the first idler gear 44. The first idler gear 44 is installed on the upper fuselage 37 through the first support column 50; the first idler gear 44 is engaged with the gear installed at the lower part of the main shaft 21.

[0009] The friction clutch comprises a first driving disc 6, a second driving disc 8, a third driving disc 10, a first driven disc 7 and a second driven disc 9. The first driving disc 6, the second driving disc 8 and the third driving disc 10 are all mounted on the guide connecting shaft 5, wherein the first driving disc 6 and the second driving disc 8 can slide on the guide connecting shaft 5, and the third driving disc 10 is fixedly mounted on the guide connecting shaft 5 through a shaft shoulder, and the lower end of the guide connecting shaft 5 is mounted in the flywheel 4; a spring 11 is installed between the first driving disc 6, the second driving disc 8 and the third driving disc 10 of the clutch; the first driven disc 7 and the second driven disc 9 of the clutch are all mounted on the guide connecting shaft 5. Fixedly connected and fixed to the main shaft 21, the first driven disc 7 and the second driven disc 9 of the clutch are equipped with a floating mosaic first friction plate 12; the lower part of the first active disc 6 of the clutch is in contact with the upper ends of the plungers of multiple first hydraulic cylinders 13 evenly distributed in the circumference, and the first hydraulic cylinder 13 is installed in the flywheel 4 through the pressure cover 14. The oil enters the annular oil groove 19 through the oil groove in the main shaft 21, and then the oil is injected into the first hydraulic cylinder 13; the third active disc 10, the first driven disc 7 and the second driven disc 9 are all provided with reinforcing ribs to increase their strength and heat dissipation; blades 17 are installed on the flywheel 4, which can be driven by the flywheel 4 to rotate to blow air and dissipate heat to the clutch.

[0010] The slider return mechanism includes a turntable bearing 29, on which a second friction plate 28 is installed. The second friction plate 28 can engage with the bottom of the return disk 26, and the return disk 26 is fixedly connected to the bottom of the flywheel 4; the outer ring of the turntable bearing 29 is supported by multiple circumferentially distributed second hydraulic cylinders 32, and the outer ring of the turntable bearing 29 is positioned by the fuselage boss; the inner ring of the turntable bearing 29 has a gear, which is engaged with the second pinion 31 through multiple second idler gears 30, and the second pinion 31 is fixedly connected to the main shaft 21, and the second pinion 31 is supported by the thrust bearing 23 below; the second idler gear 30 is installed on the outer ring of the first deep groove ball bearing 35, and the second idler gear 30 is axially positioned by a retaining ring; two first deep groove ball bearings 35 are installed on the second support column 33, and the second support column 33 is interference fit with the upper fuselage 37.

[0011] The hydraulic pipeline system includes an oil pipe 25, a rotary joint 24 and an annular oil groove 19; the pump station is connected to the rotary joint 24 through the oil pipe 25, and the rotary joint 24 is installed at the upper end of the main shaft 21. An oil groove is opened on the upper part of the main shaft 21. The oil enters the annular oil groove 19 through the oil groove in the main shaft 21. The annular oil groove 19 is installed on the main shaft 21 and is equipped with a first sealing ring 19-2. The annular oil groove 19 has small holes in its circumference and is connected to the first hydraulic cylinder 13 through a pipe joint 19-1.

[0012] The rotary joint 24 includes a housing 24-1 and an inner tube 24-2; the housing 24-1 is fixedly mounted on the oil chamber of the main shaft 21 through a flange, and a second deep groove ball bearing 24-3 is installed between the housing 24-1 and the inner tube 24-2. The inner and outer rings of the second deep groove ball bearing 24-3 are axially fixed by a shaft shoulder and an elastic retaining ring 24-4.

[0013] The flywheel 4 is mounted on the main shaft 21 through a tapered roller bearing 20; the flywheel 4 is driven by a belt and the first pinion 3, the first pinion 3 is connected to the output shaft of the drive motor 1, and the drive motor 1 is mounted on the upper fuselage 37.

[0014] The beneficial effects of the present invention are:

[0015] (1) The use of four first screws for transmission effectively reduces the diameter of the first screw, reducing the difficulty of lifting, transporting and manufacturing large-diameter screws; during multi-die forging, it reduces the side load, improves the anti-side load capacity of the press, and increases the work surface.

[0016] (2) After the working stroke of the press is completed, the return stroke of the slider is replaced by the second hydraulic cylinder pushing the turntable bearing and engaging with the flywheel through the second friction plate and the return disk. The power for the slider to rise is still provided by the flywheel. Compared with the classic screw press that directly uses the hydraulic cylinder to pull the slider up and return, the second hydraulic cylinder does not need to directly pull the slider back, but only needs to push the turntable bearing, which can greatly reduce the size of the hydraulic cylinder and effectively improve the energy utilization rate, making it more energy-saving.

[0017] (3) The friction clutch is located on the upper side of the machine body and adopts a floating insert type. Compared with existing clutch-type screw presses, when the clutch friction material is damaged, only the insert needs to be replaced, which makes it easier to disassemble and replace the friction material and convenient for maintenance. The flywheel and motor are driven by a belt, which effectively reduces the size of the flywheel.

[0018] (4) A rib is added to the clutch friction disc, and blades are installed on the flywheel to blow air to the clutch to dissipate heat. The clutch is arranged in an open manner, which effectively increases the heat dissipation effect of the clutch.

[0019] (5) The strength and rigidity of the fuselage are increased by wrapping steel wire between the upper crossbeam, the columns and the lower crossbeam. The structure is simple, the manufacturing difficulty is reduced and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 yes Figure 1 Left view of .

[0022] Figure 3 yes Figure 1AA cross-section diagram.

[0023] Figure 4 yes Figure 3 BB cross-section diagram.

[0024] Figure 5 yes Figure 1 A partial diagram of .

[0025] Figure 6 It is a structural diagram of the slider return mechanism.

[0026] Figure 7 This is a schematic diagram of the annular oil groove and its installation.

[0027] Figure 8 This is a schematic diagram of a rotary joint and its installation. DETAILED DESCRIPTION

[0028] The present invention is described in detail below with reference to the embodiments and accompanying drawings.

[0029] Reference Figure 1 A fixed-axis planetary gear driven slider return type multi-screw super-large screw press includes an upper body 37 in the body, the upper body 37 is connected to the lower part of the main shaft 21 through a force amplification mechanism, and the lower part of the main shaft 21 is installed on the upper body 37; the upper part of the main shaft 21 is installed with a slider return mechanism, a flywheel 4, and a friction clutch in sequence; the slider return mechanism is close to the upper body 37 and is located at the lower side of the main shaft 21, the friction clutch is located at the upper side of the main shaft 21, and the flywheel 4 is located in the middle of the main shaft 21; the flywheel 4 and the friction clutch form a whole in structure; the friction clutch and the slider return mechanism are both connected to the hydraulic pipeline system.

[0030] Reference Figure 1 、 Figure 2 The fuselage includes an upper fuselage 37, a lower fuselage 38, an upper crossbeam 39, a column 40 and a lower crossbeam 41. The three upper crossbeams 39, the upper crossbeam 39 and the column 40, the column 40 and the lower crossbeam 41, the three lower crossbeams 41, the upper crossbeam 39 and the upper fuselage 37, and the lower crossbeam 41 and the lower fuselage 38 are all connected by connecting plates 42. The overall fuselage strength and rigidity are increased by wrapping steel wire between the upper crossbeam 39, the column 40 and the lower crossbeam 41.

[0031] Reference Figure 1 、 Figure 3 、 Figure 4The force amplification mechanism includes four first screws 46 connected to the upper fuselage 37. The lower part of the first screw 46 forms a spiral fit with the nut 47. The nut 47 is embedded in the slider 48. The slider 48 is guided by a guide rail 49 installed on the column 40; a gear 45 is installed on the upper part of the first screw 46, and the gear 45 is engaged with the first idler gear 44. The first idler gear 44 is installed on the upper fuselage 37 through the first support column 50; the first idler gear 44 is engaged with the gear installed at the lower part of the main shaft 21.

[0032] Reference Figure 1 、 Figure 5 The friction clutch includes a first active disc 6, a second active disc 8, a third active disc 10, a first driven disc 7 and a second driven disc 9. The first active disc 6, the second active disc 8 and the third active disc 10 are all mounted on the guide connecting shaft 5, wherein the first active disc 6 and the second active disc 8 can slide on the guide connecting shaft 5, and the third active disc 10 is fixedly mounted on the guide connecting shaft 5 through a shaft shoulder, and the lower end of the guide connecting shaft 5 is mounted in the flywheel 4; a spring 11 is installed between the first active disc 6, the second active disc 8 and the third active disc 10 of the clutch; the first driven disc 7 and the second driven disc 9 of the clutch are fixedly connected and are connected through The key 18 is fixedly connected to the main shaft 21, and the first driven disc 7 and the second driven disc 9 of the clutch are equipped with a floating inlaid first friction plate 12; the lower part of the first active disc 6 of the clutch is in contact with the upper ends of the plungers of multiple first hydraulic cylinders 13 evenly distributed in the circumference, and the first hydraulic cylinder 13 is installed in the flywheel 4 through the pressure cover 14. The oil enters the annular oil groove 19 through the oil groove in the main shaft 21, and then the oil is injected into the first hydraulic cylinder 13; the third active disc 10, the first driven disc 7 and the second driven disc 9 are all provided with reinforcing ribs to increase their strength and heat dissipation; blades 17 are installed on the flywheel 4 by screws 15 and pins 16, which can be driven by the flywheel 4 to rotate to blow air and dissipate heat to the clutch.

[0033] Reference Figure 1 、 Figure 5 The flywheel 4 is mounted on the main shaft 21 through a tapered roller bearing 20; the flywheel 4 is driven by a belt and the first pinion 3, the first pinion 3 is connected to the output shaft of a drive motor 1 through a first flat key 2, and the drive motor 1 is mounted on the upper fuselage 37.

[0034] Reference Figure 6The slider return mechanism includes a turntable bearing 29, on which a second friction plate 28 is mounted. The second friction plate 28 can engage with the bottom of the return disk 26, and the return disk 26 is fixedly connected to the bottom of the flywheel 4; the outer ring of the turntable bearing 29 is supported by multiple circumferentially evenly distributed second hydraulic cylinders 32, and the outer ring of the turntable bearing 29 is positioned by the fuselage boss; the inner ring of the turntable bearing 29 has a gear, which meshes with the second pinion 31 through multiple second idler gears 30, and the second pinion 31 is fixedly connected to the main shaft 21, and the second pinion 31 is supported by the thrust bearing 23 below; the second idler gear 30 is mounted on the outer ring of the first deep groove ball bearing 35, and the second idler gear 30 is axially positioned by a retaining ring; two first deep groove ball bearings 35 are mounted on the second support column 33, and the second support column 33 is interference fit with the upper fuselage 37.

[0035] Reference Figure 1 、 Figure 5 、 Figure 7 The hydraulic pipeline system includes an oil pipe 25, a rotary joint 24 and an annular oil groove 19; the pump station is connected to the rotary joint 24 through the oil pipe 25, and the rotary joint 24 is installed at the upper end of the main shaft 21. An oil groove is opened on the upper part of the main shaft 21. The oil enters the annular oil groove 19 through the oil groove in the main shaft 21. The annular oil groove 19 is installed on the main shaft 21 and is equipped with a first sealing ring 19-2. The annular oil groove 19 has small holes in its circumference and is connected to the first hydraulic cylinder 13 through a pipe joint 19-1.

[0036] Reference Figure 8 The rotary joint 24 includes a shell 24-1 and an inner tube 24-2; the shell 24-1 is fixedly mounted on the oil chamber of the main shaft 21 through a flange, and a second deep groove ball bearing 24-3 is installed between the shell 24-1 and the inner tube 24-2. The inner and outer rings of the second deep groove ball bearing 24-3 are axially fixed by a shaft shoulder and an elastic retaining ring 24-4.

[0037] Working principle of the present invention:

[0038] During the working stroke of the screw press, the three active discs and two driven discs of the friction clutch engage; first, the oil in the pump station flows through the oil pipe 25 and the rotary joint 24 and is injected into the oil groove on the main shaft 21. The oil passes through the annular oil groove 19 and enters the first hydraulic cylinder 13 through the oil pipe 25. The plunger rod pushes the first active disc 6 of the clutch upward. The first active disc 6 slides upward on the guide connecting shaft 5. The spring 11 is compressed, and the first active disc 6 engages with the first friction plate 12 in the first driven disc 6. The plunger rod of the first hydraulic cylinder 13 continues to push upward. The first friction plate 12 in the first driven disc 7 The plate 12 slides upward under the push of the first active plate 6, and pushes the second active plate 8 to slide upward on the guide connecting shaft 5. The second active plate 8 pushes the first friction plate in the second driven plate 9. Finally, the three active plates and two driven plates of the clutch are fully engaged. At this time, the rotation of the flywheel 4 can be transmitted to the clutch driven plate through the clutch active plate, and the clutch driven plate is transmitted to the main shaft 21. The gear on the main shaft 21 is transmitted to the four first screws 46 through the first idler gear 44 and the gear 45. The first screw 46 can rotate and gradually accelerate, causing the slider 48 to move downward at a certain speed.

[0039] When the screw press completes its working stroke, the oil in the pumping station flows to the second hydraulic cylinder 32. The plunger of the second hydraulic cylinder 32 pushes the outer ring of the turntable bearing 29, causing the turntable bearing 29 to move upward. The second friction plate 28 on the inner ring of the turntable bearing 29 engages with the return plate 26. The return plate 26 is fixed to the flywheel 4, so the flywheel 4 can drive the inner ring of the turntable bearing 29 to rotate. The inner ring of the turntable bearing 29 drives the second pinion 31 to rotate in the opposite direction through the second idler gear 30. The second pinion 31 drives the main shaft 21 to rotate in the opposite direction, and the slider 48 completes its return stroke. When the slider 48 returns to a certain position, the second hydraulic cylinder 32 stops supplying oil, and the turntable bearing 29 moves downward under the action of gravity. The return plate 26 disengages the second friction plate 28 on the turntable bearing 29, and the slider 48 stops moving upward, causing the flywheel 4 to idle. At this point, a complete working stroke of the screw press is completed.

Claims

1. A fixed-axis planetary gear driven slider return type multi-screw super-large screw press, comprising an upper body (37) in the body, characterized in that: The upper body (37) is connected to the lower part of the main shaft (21) through a force-increasing mechanism, and the lower part of the main shaft (21) is mounted on the upper body (37); the upper part of the main shaft (21) is sequentially mounted with a slider return mechanism, a flywheel (4), and a friction clutch; the slider return mechanism is close to the upper body (37) and is located at the lowermost side of the main shaft (21); the friction clutch is located at the uppermost side of the main shaft (21), and the flywheel (4) is located in the middle of the main shaft (21); the flywheel (4) and the friction clutch form a whole in structure; the friction clutch and the slider return mechanism are both connected to the hydraulic pipeline system; The force-increasing mechanism includes four first screws (46) connected to the upper body (37), the lower portion of the first screw (46) forms a spiral fit with a nut (47), the nut (470) is embedded in a slider (48), and the slider (48) is guided by a guide rail (49) installed on the column (40); a gear (45) is installed on the upper portion of the first screw (46), the gear (45) is engaged with a first idler (44), and the first idler (44) is installed on the upper body (37) through a first support column (50); the first idler (44) is engaged with a gear installed on the lower portion of the main shaft (21); The friction clutch comprises a first active disc (6), a second active disc (8), a third active disc (10), a first driven disc (7) and a second driven disc (9), wherein the first active disc (6), the second active disc (8) and the third active disc (10) are all mounted on a guide connecting shaft (5), wherein the first active disc (6) and the second active disc (8) can slide on the guide connecting shaft (5), and the third active disc (10) is fixedly mounted on the guide connecting shaft (5) through a shaft shoulder, and the lower end of the guide connecting shaft (5) is mounted in a flywheel (4); the first active disc (6), the second active disc (8) and the third active disc (10) are all mounted on a guide connecting shaft (5), wherein the first active disc (6) and the second active disc (8) can slide on the guide connecting shaft (5), and the third active disc (10) is fixedly mounted on the guide connecting shaft (5) through a shaft shoulder, and the lower end of the guide connecting shaft (5) is mounted in a flywheel (4); ) and a third active disc (10) are both provided with a spring (11); the first driven disc (7) and the second driven disc (9) of the clutch are fixedly connected and fixedly connected to the main shaft (21); the first driven disc (7) and the second driven disc (9) of the clutch are provided with a floating inlaid first friction plate (12); the lower portion of the first active disc (6) of the clutch contacts the upper ends of the plungers of a plurality of first hydraulic cylinders (13) uniformly distributed in the circumferential direction; the first hydraulic cylinders (13) are installed in the flywheel (4) through a pressure cover (14); the oil enters the annular oil groove (19) through the oil groove in the main shaft (21), and then the oil is injected into the first hydraulic cylinder (13); The slider return mechanism includes a turntable bearing (29), a second friction plate (28) is installed on the turntable bearing (29), and the second friction plate (28) can be engaged with the bottom of the return disk (26), and the return disk (26) is fixedly connected to the bottom of the flywheel (4); the bottom of the outer ring of the turntable bearing (29) is supported by multiple circumferentially evenly distributed second hydraulic cylinders (32), and the outer ring of the turntable bearing (29) is positioned by the fuselage boss; the inner ring of the turntable bearing (29) has a gear, which is fixed by multiple A second idler gear (30) is meshed with a second pinion (31), the second pinion (31) is fixedly connected to the main shaft (21), and the lower portion of the second pinion (31) is supported by a thrust bearing (23); the second idler gear (30) is mounted on the outer ring of the first deep groove ball bearing (35), and the second idler gear (30) is axially positioned by a retaining ring; the two first deep groove ball bearings (35) are mounted on a support column (33), and the support column (33) and the upper body (37) are interference fit; The hydraulic pipeline system includes an oil pipe (25), a rotary joint (24) and an annular oil groove (19); the pump station is connected to the rotary joint (24) through the oil pipe (25); the rotary joint (24) is installed at the upper end of the main shaft (21); an oil groove is opened on the upper part of the main shaft (21); oil enters the annular oil groove (19) through the oil groove in the main shaft (21); the annular oil groove (19) is installed on the main shaft (21) and is installed with a first sealing ring (19-2); the annular oil groove (19) has small holes in its circumference and is connected to the first hydraulic cylinder (13) through a pipe joint (19-1).

2. The press according to claim 1, characterized in that: The fuselage comprises an upper fuselage (37), a lower fuselage (38), an upper crossbeam (39), a column (40) and a lower crossbeam (41). The three upper crossbeams (39), the upper crossbeam (39) and the column (40), the column (40) and the lower crossbeam (41), the three lower crossbeams (41), the upper crossbeam (39) and the upper fuselage (37), and the lower crossbeam (41) and the lower fuselage (38) are all connected by connecting plates (42). The strength and rigidity of the fuselage as a whole are increased by winding steel wire between the upper crossbeam (39), the column (40) and the lower crossbeam (41).

3. The press according to claim 1, wherein: The rotary joint (24) comprises a housing (24-1) and an inner tube (24-2); the housing (24-1) is fixedly mounted on the oil chamber of the main shaft (21) via a flange, and a second deep groove ball bearing (24-3) is installed between the housing (24-1) and the inner tube (24-2).

4. The press according to claim 1, wherein: The third active disc (10), the first driven disc (7) and the second driven disc (9) are all provided with reinforcing ribs to increase their strength and heat dissipation; and blades (17) are installed on the flywheel (4), which are driven by the flywheel (4) to rotate and blow air to the clutch for heat dissipation.

5. The press according to claim 1, characterized in that: The flywheel (4) is mounted on the main shaft (21) via a tapered roller bearing (20); the flywheel (4) is driven by a first pinion (3) via a belt, the first pinion (3) is connected to the output shaft of a drive motor (1), and the drive motor (1) is mounted on the upper body (37).

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