A double power device for a rolling machine

Abstract

The utility model discloses a double power device of roll type machine, solved the flange face and the support disc contact place of workpiece steel shell in prior art easy to produce slip, even produce the problem of friction welding. The utility model discloses a motor and transmission shaft are set up on the frame, and the motor is through first transmission mechanism with transmission shaft transmission connection, and the upper portion of transmission shaft is through second transmission mechanism with upper axle subassembly transmission connection, and the lower part of transmission shaft is through third transmission mechanism with lower axle subassembly transmission connection, and the lower part of upper axle subassembly is equipped with the anvil, and the upper part of lower axle subassembly is equipped with the support disc, and the anvil carries out the synchronous rotation support of workpiece steel shell while rotating and pressing down, and the utility model discloses upper and lower main shaft drive steel shell rotation simultaneously, has increased the friction of driving steel shell rotation, has reduced the friction of preventing steel shell rotation, and the flange face and the support disc contact place of workpiece steel shell do not have relative motion, will not produce slip or friction welding phenomenon again, has improved the steel shell roll type yield, has reduced production cost.

Description

Technical Field

[0001] This utility model relates to the field of roll forming machine technology, and in particular to a dual-power device for roll forming machines. Background Technology

[0002] Steel composite brake drums are a product developed in recent years. Since their market launch, customer feedback has been positive, with a significantly longer service life than ordinary gray iron brake drums. The steel composite brake drum blank is made from a steel shell through centrifugal casting. The steel shell is formed from steel plates through blanking, spinning, and rolling. The rolling process involves the motor driving the main shaft of the rolling machine to rotate, which in turn drives the steel shell to rotate. Rolling wheels roll the outer circumference of the steel shell, producing a steel shell with a wavy structure.

[0003] Existing roll forming machines, such as the vertical roll forming machine for brake drum steel shells with authorization announcement number CN 212419249 U, use a single power system. The motor drives the lower spindle to rotate via a belt, pulley, and key. During roll forming: the support plate at the upper end of the lower spindle first supports the inner flange of the steel shell, and then the pressure head of the upper spindle presses against the outer flange of the steel shell. The frictional force f1 generated by the rotation of the lower spindle causes the steel shell and the upper spindle to rotate simultaneously. Then, the roll forming wheels roll the outer circle of the steel shell. At this time, the outer circle of the steel shell is subjected to significant pressure. Furthermore, the pressure head of the upper spindle pressing against the outer flange of the steel shell also generates pressure. These two pressures cause the steel shell to generate a frictional force f2 in the opposite direction of rotation. When the rolling pressure is large, the friction force f2 is greater than the friction force f1. The lower spindle cannot drive the steel shell to rotate synchronously. Slippage will occur at the contact point between the flange and the support plate inside the steel shell, and sometimes even friction welding and other quality instability problems will occur. Steel shells with slippage and friction welding cannot be used later and must be scrapped, which reduces the yield and increases the production cost. Utility Model Content

[0004] To address the shortcomings in the aforementioned background technology, this utility model proposes a dual-power device for a rolling mill, which solves the problem of slippage and even friction welding that easily occur at the contact point between the inner flange surface of the workpiece steel shell and the support plate in the prior art.

[0005] The technical solution of this utility model is implemented as follows: A dual-power device for a roll forming machine includes a motor and a transmission shaft mounted on a frame. The motor is connected to the transmission shaft via a first transmission mechanism. The upper part of the transmission shaft is connected to an upper shaft assembly via a second transmission mechanism, and the lower part of the transmission shaft is connected to a lower shaft assembly via a third transmission mechanism. A pressure head is provided at the lower part of the upper shaft assembly, and a support plate is provided at the upper part of the lower shaft assembly. While the pressure head rotates and presses down on the workpiece steel shell, the support plate synchronously rotates and supports the workpiece steel shell. The power of the motor is distributed to both ends through the transmission shaft. After the steel shell is pressed, the upper and lower main shafts rotate simultaneously, driving the steel shell to rotate. This effectively solves the problem of slippage at the contact point between the flange surface inside the workpiece steel shell and the support plate, which can sometimes even lead to unstable quality such as friction welding, thus improving the yield and reducing production costs.

[0006] In a further preferred embodiment, the first transmission mechanism includes a first pulley mounted on the motor output shaft and a second pulley mounted on the transmission shaft. The first pulley is connected to the second pulley via a first belt, thereby achieving smooth power transmission from the motor to the transmission shaft.

[0007] More preferably, the second transmission mechanism includes a third pulley disposed on the upper part of the transmission shaft and a fourth pulley disposed on the upper part of the upper shaft assembly. The third pulley is connected to the fourth pulley via a second belt, thereby achieving smooth power transmission from the transmission shaft to the upper shaft assembly.

[0008] Further preferably, the upper shaft assembly includes a splined shaft and an upper spindle, with the upper spindle coaxially arranged with the splined shaft. The upper part of the upper spindle is connected to the splined shaft by bolts and a second flat key, and the lower part of the upper spindle is connected to the pressure head by bolts, ensuring a stable connection between the splined shaft and the upper spindle.

[0009] Further preferably, the splined shaft is provided with a pulley shaft, the fourth pulley is connected to the pulley shaft by a first flat key, and the pulley shaft is rotatably connected to the frame by a first bearing; the upper main shaft is rotatably connected to the support seat set on the frame by a second bearing; ensuring the smooth rotation of the fourth pulley.

[0010] Further preferably, the lower shaft assembly includes a lower main shaft and a lower shaft seat and an upper shaft seat mounted on the frame. The lower main shaft is rotatably connected to the lower shaft seat via a third bearing, and the lower main shaft is rotatably connected to the upper shaft seat via a fourth bearing. The lower part of the support plate is located inside the upper shaft seat and is connected to the lower main shaft via a third flat key and bolts. The upper shaft seat is equipped with a rolling die, which is rotatably connected to the upper shaft seat via an eighth bearing; this ensures the rotation of the rolling die during the rolling process, and the rolling die cooperates with the rolling wheel to efficiently roll the steel shell.

[0011] In a further preferred embodiment, the third transmission mechanism includes a fifth pulley located at the lower part of the transmission shaft and a sixth pulley located at the lower part of the lower main shaft. The fifth pulley is connected to the sixth pulley via a third belt, thereby achieving smooth power transmission from the transmission shaft to the lower main shaft.

[0012] Further optimization involves rotatably connecting the upper part of the drive shaft to the frame via a fifth bearing, and rotatably connecting the lower part of the drive shaft to the frame via a sixth bearing, ensuring smooth rotation of the drive shaft.

[0013] In a further preferred embodiment, the pressure head corresponds to the outer flange surface of the workpiece steel shell, and the support plate corresponds to the inner flange surface of the workpiece steel shell; this allows the inner and outer flange surfaces of the workpiece steel shell to rotate synchronously, reducing slippage at the contact point.

[0014] The beneficial effects of this utility model are as follows: the upper and lower main shafts drive the steel shell to rotate simultaneously, turning the frictional force of the upper main shaft that prevents the steel shell from rotating into the frictional force that drives the steel shell to rotate, thus increasing the frictional force that drives the steel shell to rotate and reducing the frictional force that prevents the steel shell from rotating; there is no relative movement between the inner flange surface of the steel shell and the contact point of the support plate, so slippage or friction welding will no longer occur; the yield of rolled steel shell products is improved and the production cost is reduced.

[0015] The power of the motor in this invention is distributed to both ends through the transmission shaft, and then synchronously transmitted to the upper and lower main shafts through the transmission mechanism. After the steel shell is pressed, the upper and lower main shafts rotate at the same time, driving the steel shell to rotate. Then, the rolling die and rolling wheel perform efficient rolling operation on the steel shell, further improving the work efficiency. Attached Figure Description

[0016] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram showing the mating state of the rolling die and the rolling wheel of this utility model; Figure 3 This is a schematic diagram of the drive shaft of this utility model; Figure 4 This is a schematic diagram showing the fit between the upper spindle and the pressure head; Figure 5 This is a schematic diagram showing the connection between the lower spindle and the support plate. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1, as Figure 1 As shown, a dual-power device for a roll forming machine includes a motor 1 and a drive shaft 2 mounted on a frame 21. The frame 21 is partially shown in the figure, with both the motor and drive shaft vertically positioned. The motor 1 is connected to the drive shaft 2 via a first transmission mechanism; the power output from the motor is transmitted to the drive shaft through the first transmission mechanism, and this power is the main power source for the dual-power device. The upper part of the drive shaft 2 is connected to an upper shaft assembly 3 via a second transmission mechanism, and the lower part is connected to a lower shaft assembly 4 via a third transmission mechanism. Part of the power on the drive shaft is transmitted to the upper shaft assembly via the second transmission mechanism, and part is transmitted to the lower shaft assembly via the third transmission mechanism, achieving dual power input from both shafts. The upper shaft assembly 3 has a pressure head 5 at its lower part, and the lower shaft assembly 4 has a support plate 6 at its upper part. The pressure head 5 rotates and presses down on the workpiece steel shell 20, while the support plate 6 synchronously rotates and supports the workpiece steel shell 20. Specifically, the pressure head 5 corresponds to the outer flange surface of the workpiece steel shell 20, and the support plate 6 corresponds to the inner flange surface of the workpiece steel shell 20. When rolling a workpiece steel shell (hereinafter referred to as steel shell): the support plate first supports the inner flange surface of the steel shell, the rolling die supports the inner wall of the steel shell, and the pressure head presses against the outer flange surface of the steel shell. The friction generated when the upper and lower shaft assemblies rotate simultaneously drives the steel shell to rotate. Then, the rolling wheel rolls the outer circle of the steel shell. At this time, the outer circle of the steel shell will be subjected to great pressure. This pressure will cause the steel shell to generate a frictional force in the opposite direction of rotation, which will prevent the steel shell from rotating. This utility model uses the upper and lower shaft assemblies to drive the power simultaneously, which increases the friction between the inner and outer surfaces of the steel shell flange. The steel shell and the upper and lower shaft assemblies rotate simultaneously without relative movement, so slippage or even friction welding will not occur.

[0020] Example 2, as Figure 3 As shown, a dual-power device for a roll forming machine is further optimized based on Embodiment 1. In this embodiment, the first transmission mechanism includes a first pulley 7 mounted on the output shaft of a motor 1 and a second pulley 8 mounted on a transmission shaft 2. The first pulley 7 is connected to the second pulley 8 via a first belt 11. The first pulley is connected to the motor output shaft via a key, and the second pulley 8 is connected to the transmission shaft via a key. The motor drives the second pulley to rotate via the first pulley and the first belt, and the second pulley drives the transmission shaft to rotate, thus achieving a smooth transmission of power from the motor to the transmission shaft.

[0021] In this preferred embodiment, the second transmission mechanism includes a third pulley 9 disposed on the upper part of the transmission shaft 2 and a fourth pulley 10 disposed on the upper part of the upper shaft assembly 3. The third pulley 9 is connected to the fourth pulley 10 via a second belt 12. The third pulley is connected to the transmission shaft via a flat key. The transmission shaft drives the fourth pulley to rotate via the third pulley and the second belt, thereby driving the upper shaft assembly to rotate.

[0022] like Figure 4 As shown, specifically, the upper shaft assembly 3 includes a splined shaft 31 and an upper main shaft 32. The upper main shaft 32 is coaxially arranged with the splined shaft 31. The upper part of the upper main shaft 32 is connected to the splined shaft 31 by bolts and a second flat key 36. The bolts are used to connect the two axially, and the second flat key connects them circumferentially, enabling synchronous rotation between the two. The lower part of the upper main shaft 32 is connected to the pressure head 5 by bolts, ensuring that the pressure head and the upper main shaft can rotate synchronously.

[0023] In this preferred embodiment, the splined shaft 31 is equipped with a pulley shaft 33. The pulley shaft is a hollow bushing with a splined inner hole. The connection between the hollow bushing and the splined shaft is a spline connection, used to transmit the received power to the splined shaft. The fourth pulley 10 is connected to the pulley shaft 33 via a first flat key 34. The rotation of the fourth pulley drives the pulley shaft to rotate, which in turn drives the splined shaft to rotate, and then the splined shaft drives the upper main shaft to rotate. The pulley shaft 33 is rotatably connected to the frame 21 via a first bearing 35. The first bearing can be two sets of tapered roller bearings to ensure the stability of the transmission. The upper main shaft 32 is rotatably connected to the support seat 22 mounted on the frame 21 via a second bearing 37. The second bearing can be a combination of tapered roller bearings and cylindrical roller bearings to improve the stability of the upper main shaft rotation.

[0024] Example 3, as Figure 5 As shown, a dual-power device for a rolling mill is further optimized based on embodiment 1 or 2. In this embodiment, the lower shaft assembly 4 includes a lower main shaft 41 and a lower shaft seat 23 and an upper shaft seat 24 mounted on the frame 21. The lower shaft seat 23 and the upper shaft seat 24 are vertically aligned. The lower shaft seat 23 is fixed to the lower part of the frame by bolts, and the upper shaft seat is fixed to the upper part of the frame by bolts. The lower main shaft 41 is rotatably connected to the lower shaft seat 23 via a third bearing 42. The third bearing can be a combination of tapered roller bearings and cylindrical roller bearings to improve the rotational stability of the lower main shaft. The lower main shaft 41 is rotatably connected to the upper shaft seat 24 via a fourth bearing 43. The fourth bearing can be a cylindrical roller bearing to ensure the stability of the rotation and transmission of the lower main shaft. The lower part of the support plate 6 is located inside the upper shaft seat 24 and is connected to the lower main shaft 41 via a third flat key 44 and bolts. The bolts realize the axial connection between the support plate and the lower main shaft, and the third flat key realizes the circumferential connection between the support plate and the lower main shaft, ensuring the stability of the transmission.

[0025] In this embodiment, the upper shaft seat 24 is provided with a rolling die 19, which is rotatably connected to the upper shaft seat 24 via an eighth bearing 45. During the rolling process, the rolling die contacts the inner wall of the steel shell and works with the rolling wheel to stably roll the steel shell. In this embodiment, the third transmission mechanism includes a fifth pulley 14 located at the lower part of the transmission shaft 2 and a sixth pulley 15 located at the lower part of the lower main shaft 41. The fifth pulley 14 is connected to the sixth pulley 15 via a third belt 13. The rotation of the fifth pulley drives the sixth pulley to rotate via the third belt. Then, the upper part of the transmission shaft 2 is rotatably connected to the frame 21 via a fifth bearing 16, and the lower part of the transmission shaft 2 is rotatably connected to the frame 21 via a sixth bearing 17. The two ends of the transmission shaft are supported by the fifth and sixth bearings, and the middle and lower part has a second pulley and a key for receiving power transmitted from the motor. The two ends have a third pulley and a fifth pulley connected by a key for transmitting the received power to the next stage.

[0026] The working process of this utility model is as follows: The power output by the motor is transmitted to the drive shaft through the first transmission mechanism. The upper end of the drive shaft transmits the power to the pulley shaft through the second transmission mechanism. The pulley shaft transmits the power to the spline shaft through a key. The spline shaft transmits the power to the upper main shaft, and the lower end of the upper main shaft is connected to the pressure head. The lower end of the drive shaft transmits the power to the lower main shaft through the third transmission mechanism. The lower main shaft transmits the power to the support plate through a key. During the rolling process: the support plate at the upper end of the lower main shaft first supports the inner flange surface of the steel shell, the rolling die supports the inner wall of the steel shell, and the pressure head of the upper main shaft then presses against the outer flange surface of the steel shell. Then the motor starts, and the power of the motor is transmitted to the upper and lower main shafts through a series of transmissions. The upper and lower main shafts simultaneously drive the steel shell to rotate. The rolling wheel is hydraulically driven and gradually moves laterally towards the steel shell to roll the outer circle of the steel shell, rolling out a steel shell with a wavy structure; further improving the rolling efficiency; such as Figure 2 As shown.

[0027] In the description of this utility model, it should be understood that the terms "vertical", "horizontal", "up", "down", "front", "back", "left", "right", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dual-power unit for a roll forming machine, comprising a motor (1) and a transmission shaft (2) mounted on a frame (21), characterized in that: The motor (1) is connected to the transmission shaft (2) through the first transmission mechanism. The upper part of the transmission shaft (2) is connected to the upper shaft assembly (3) through the second transmission mechanism. The lower part of the transmission shaft (2) is connected to the lower shaft assembly (4) through the third transmission mechanism. The lower part of the upper shaft assembly (3) is provided with a pressure head (5), and the upper part of the lower shaft assembly (4) is provided with a support plate (6). While the pressure head (5) rotates and presses down on the workpiece steel shell (20), the support plate (6) synchronously rotates and supports the workpiece steel shell (20).

2. The dual-power device for the rolling mill according to claim 1, characterized in that: The first transmission mechanism includes a first pulley (7) disposed on the output shaft of the motor (1) and a second pulley (8) disposed on the transmission shaft (2). The first pulley (7) is connected to the second pulley (8) via a first belt (11).

3. The dual-power device for the rolling mill according to claim 1 or 2, characterized in that: The second transmission mechanism includes a third pulley (9) disposed on the upper part of the transmission shaft (2) and a fourth pulley (10) disposed on the upper part of the upper shaft assembly (3). The third pulley (9) is connected to the fourth pulley (10) via a second belt (12).

4. The dual-power device for the rolling mill according to claim 3, characterized in that: The upper shaft assembly (3) includes a spline shaft (31) and an upper spindle (32). The upper spindle (32) is coaxial with the spline shaft (31). The upper part of the upper spindle (32) is connected to the spline shaft (31) by bolts and a second flat key (36). The lower part of the upper spindle (32) is connected to the pressure head (5) by bolts.

5. The dual-power unit for the rolling mill according to claim 4, characterized in that: The spline shaft (31) is provided with a pulley shaft (33), and the fourth pulley (10) is connected to the pulley shaft (33) through the first flat key (34). The pulley shaft (33) is rotatably connected to the frame (21) through the first bearing (35). The upper main shaft (32) is rotatably connected to the support seat (22) provided on the frame (21) through the second bearing (37).

6. The dual-power unit for the roll forming machine according to claim 1, 2, or 5, characterized in that: The lower shaft assembly (4) includes a lower main shaft (41) and a lower shaft seat (23) and an upper shaft seat (24) mounted on the frame (21). The lower main shaft (41) is rotatably connected to the lower shaft seat (23) via a third bearing (42), and the lower main shaft (41) is rotatably connected to the upper shaft seat (24) via a fourth bearing (43). The lower part of the support plate (6) is located inside the upper shaft seat (24) and is connected to the lower main shaft (41) via a third flat key (44) and bolts.

7. The dual-power unit for the roll forming machine according to claim 6, characterized in that: The upper shaft seat (24) is provided with a rolling mold (19), which is rotatably connected to the upper shaft seat (24) through an eighth bearing (45).

8. The dual-power unit for the rolling mill according to claim 7, characterized in that: The third transmission mechanism includes a fifth pulley (14) located at the lower part of the transmission shaft (2) and a sixth pulley (15) located at the lower part of the lower main shaft (41). The fifth pulley (14) is connected to the sixth pulley (15) via a third belt (13).

9. The dual-power unit for the roll forming machine according to claim 1 or 8, characterized in that: The upper part of the drive shaft (2) is rotatably connected to the frame (21) via the fifth bearing (16), and the lower part of the drive shaft (2) is rotatably connected to the frame (21) via the sixth bearing (17).

10. The dual-power device for the rolling mill according to claim 1, characterized in that: The pressure head (5) corresponds to the outer flange of the workpiece steel shell (20), and the support plate (6) corresponds to the inner flange of the workpiece steel shell (20).

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