Bag making machine discharging brake device

Abstract

The invention discloses a discharging brake device of a bag making machine, which comprises a mounting frame, a support frame, a magnetic powder brake, a four-stage gear transmission group, a magnetic powder brake and a discharging winding drum, and is characterized in that the support frame is fixedly arranged on the mounting frame; the magnetic powder brake is arranged at the top of the supporting frame, and an output shaft downwards penetrates through the supporting frame; the four-stage gear transmission group comprises a first gear fixed at the bottom end of the output shaft; one side of the second gear is meshed with the first gear, and a magnetic powder brake is mounted at the shaft end of the second gear; the other side of the third gear is meshed with the first gear; the fourth gear is meshed with the third gear, and the other end of the fourth gear is connected with a discharging winding drum. Therefore, cooperative work of the double magnetic powder elements is achieved through the four-stage gear transmission set, the contradiction between automatic feeding and power-off braking is solved, the magnetic powder brake directly locks the reel through gear transmission, material looseness is effectively prevented, the maintenance cost and time are reduced, labor is saved, the production efficiency is improved, and the rejection rate is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of bag-making machine equipment, and in particular to a material discharging brake device for a bag-making machine. Background Art

[0002] During the operation of the bag-making machine, the stability of the unloading system directly affects product quality and production efficiency. The unloading brake device of the traditional bag-making machine usually adopts a single mechanical brake or electromagnetic brake structure, which has the following problems:

[0003] 1. Material loosening during shutdown: When the equipment suddenly stops or the power is cut off, the unwinding reel often continues to rotate due to inertia, causing the material to loosen, pile up or even tangle, requiring manual re-arrangement, wasting time and materials.

[0004] 2. Inaccurate tension control: The existing brake device is difficult to achieve precise control of the unwinding tension, especially in high-speed production processes, where tension fluctuations are prone to occur, resulting in bag size deviations or material breakage.

[0005] 3. Conflict between automatic loading and braking functions: If a power-off brake device is installed, the automatic loading function cannot be realized, and manual assisted loading is required, which increases labor intensity; if an automatic loading device is installed, the reel cannot be effectively locked when the machine is stopped.

[0006] There is an urgent need for a discharge brake device with a compact structure, integrated functions and precise control. Summary of the Invention

[0007] The present application aims to solve one of the technical problems in the related art at least to a certain extent.

[0008] To this end, one purpose of this application is to provide a bag making machine discharge brake device, which realizes the coordinated work of dual magnetic powder elements through a four-stage gear transmission group, solves the contradiction between automatic loading and power-off braking, simplifies the equipment structure, and the magnetic powder brake independently controls the discharge tension, which can be automatically adjusted according to the material thickness and material to improve the bag making accuracy. The magnetic powder brake directly locks the reel through gear transmission, effectively preventing material loosening, reducing maintenance costs and time, saving labor, improving production efficiency, and reducing scrap rate.

[0009] To achieve the above-mentioned purpose, the first embodiment of the present application proposes a bag-making machine unloading brake device, including a mounting frame, a support frame, a magnetic powder brake, a four-stage gear transmission group, a magnetic powder brake and a unloading reel, wherein the support frame is fixedly arranged on the mounting frame; the magnetic powder brake is arranged on the top of the support frame, and its output shaft passes through the support frame downward; the four-stage gear transmission group includes: a first gear fixed to the bottom end of the output shaft; a second gear meshing with the first gear on one side, and the magnetic powder brake is installed on the shaft end of the second gear; a third gear meshing with the first gear on the other side; a fourth gear meshing with the third gear, and the other end of the fourth gear is connected to the unloading reel.

[0010] The bag making machine discharge brake device of the embodiment of the present application realizes the coordinated work of dual magnetic powder elements through a four-stage gear transmission group, solves the contradiction between automatic loading and power-off braking, simplifies the equipment structure, and the magnetic powder brake independently controls the discharge tension, which can be automatically adjusted according to the material thickness and material to improve the bag making accuracy. The magnetic powder brake directly locks the reel through gear transmission, effectively preventing material loosening, reducing maintenance costs and time, saving labor, improving production efficiency, and reducing scrap rate.

[0011] In addition, the bag-making machine discharge brake device proposed in the present application may also have the following additional technical features:

[0012] In one embodiment of the present application, the magnetic powder brake is fixedly connected to the top of the support frame through a bolt group, a bearing is provided between the output shaft and the support frame, and the bottom end of the output shaft is fixed to the first gear through a flat key.

[0013] In one embodiment of the present application, the shaft end of the second gear is rigidly connected to the input shaft of the magnetic powder brake through a coupling, and the magnetic powder brake is fixed to the side of the mounting frame through a bracket.

[0014] In one embodiment of the present application, the third gear and the fourth gear have the same module, and the diameter of the first gear is smaller than the diameters of the second gear and the third gear, forming a reduction transmission structure.

[0015] In one embodiment of the present application, the other end of the fourth gear cooperates with the central shaft hole of the unwinding drum through a spline shaft, and a locking nut is provided at the end of the spline shaft for axially fixing the unwinding drum.

[0016] In one embodiment of the present application, the transmission ratio between the first gear and the second gear is 1:2-1:3, the transmission ratio between the third gear and the fourth gear is 1:1.5-1:2, and the four-stage gear transmission group as a whole forms a two-stage reduction structure.

[0017] In one embodiment of the present application, the control circuit of the magnetic powder brake is connected in parallel to the electronic control system of the bag making machine, and the electronic control system is configured as follows:

[0018] activating the magnetic powder brake and releasing the magnetic powder brake when the equipment is running;

[0019] When the equipment is stopped, the magnetic powder brake is released and the magnetic powder brake is activated.

[0020] In one embodiment of the present application, the first gear, the second gear, the third gear and the fourth gear are all helical gears with the same helical angle, the first gear and the second gear have opposite rotation directions, and the third gear and the fourth gear have opposite rotation directions.

[0021] The advantages of this application compared with the existing technology are:

[0022] (1) The coordinated work of the dual magnetic powder elements (magnetic powder brake and magnetic powder brake) is achieved through a four-stage gear transmission group, which solves the contradiction between automatic feeding and power-off braking and simplifies the equipment structure.

[0023] (2) The magnetic powder brake independently controls the unwinding tension and can automatically adjust according to the material thickness and material to improve the bag making accuracy. The magnetic powder brake directly locks the reel through gear transmission to effectively prevent the material from loosening.

[0024] (3) The modular design allows each component to be disassembled and replaced independently, reducing maintenance costs and time, saving labor, improving production efficiency, and reducing scrap rates.

[0025] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0027] Figure 1 This is a perspective view of a bag-making machine unloading brake device according to one embodiment of the present application;

[0028] Figure 2 This is a perspective view of a bag-making machine unloading brake device according to another embodiment of the present application;

[0029] Figure 3 This is a schematic plan view of the structure of a bag-making machine unloading brake device according to one embodiment of the present application;

[0030] Figure 4This is a control connection diagram of a bag making machine discharge brake device according to one embodiment of the present application.

[0031] As shown in the figure: 1. Mounting frame; 2. Support frame; 3. Magnetic powder brake; 31. Output shaft; 4. Four-stage gear transmission group; 41. First gear; 42. Second gear; 43. Third gear; 44. Fourth gear; 5. Magnetic powder brake; 52. Bracket; 6. Unwinding reel; 7. Electronic control system. DETAILED DESCRIPTION

[0032] The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application and are not to be construed as limiting the present application. On the contrary, the embodiments of the present application include all variations, modifications, and equivalents that fall within the spirit and scope of the appended claims.

[0033] The following describes the bag making machine discharge brake device according to an embodiment of the present application with reference to the accompanying drawings.

[0034] like Figure 1-Figure 4 As shown, the bag making machine unloading brake device of the embodiment of the present application may include a mounting frame 1, a support frame 2, a magnetic powder brake 3, a four-stage gear transmission group 4, a magnetic powder brake 5 and a unloading reel 6.

[0035] It is understandable that the support frame 2 is vertically fixed to the top plane of the mounting frame 1 by a bolt group to ensure that there is no relative displacement between the two.

[0036] The magnetic powder brake 3 is fixed to the top center of the support frame 2 through a flange, and its output shaft 31 extends vertically downward and passes through the preset shaft hole of the support frame 2. A deep groove ball bearing is installed between the output shaft 31 and the support frame 2 to reduce rotational friction.

[0037] The first gear 41 is circumferentially fixed to the bottom end of the output shaft 31 by a flat key and is axially limited by a shaft elastic retaining ring to ensure that the first gear 41 and the output shaft 31 rotate synchronously.

[0038] The second gear 42 is located to the left of the first gear 41. Its teeth mesh with those of the first gear 41, maintaining the same module and pressure angle. The shaft end of the second gear 42 is rigidly connected to the input shaft of the magnetic powder brake 5 via a coupling, ensuring lossless torque transmission.

[0039] The third gear 43 is located on the right side of the first gear 41 and directly meshes with the first gear 41 . The module of the third gear 43 is the same as that of the second gear 42 , but the diameter can be adjusted according to the transmission ratio requirements.

[0040] The fourth gear 44 meshes with the right side of the third gear 43 to form a two-stage reduction transmission. The right end of the central axis of the fourth gear 44 is processed with a spline shaft, which cooperates with the central spline hole of the unwinding reel 6 to achieve circumferential torque transmission and axial sliding adjustment.

[0041] The magnetic powder brake 5 is fixed to the side vertical plate of the mounting frame 1 , and its input shaft is coaxial with the shaft end of the second gear 42 to ensure stability during braking.

[0042] After the central spline hole of the unwinding drum 6 is matched with the spline shaft of the fourth gear 44, the locking nut is tightened at the end of the spline shaft to prevent the unwinding drum 6 from axial movement during rotation through the axial preload force.

[0043] Workflow:

[0044] 1. Power transmission path

[0045] When the bag-making machine is started, the power source rotates the output shaft 31 of the magnetic powder brake 3, which in turn drives the first gear 41 to rotate synchronously. The first gear 41 simultaneously drives the second gear 42 on the left and the third gear 43 on the right to rotate in opposite directions. The third gear 43 further drives the meshing fourth gear 44, which ultimately drives the unwinding reel 6 via the splined shaft of the fourth gear 44, unwinding the packaging material.

[0046] 2. Tension control mechanism

[0047] During the unwinding process, the magnetic powder brake 3 adjusts its output torque in real time via the electronic control system 7 to control the material tension. When the material requires greater tension, the excitation current of the magnetic powder brake 3 is increased, increasing the resistance of the output shaft 31; otherwise, the excitation current is reduced. This ensures constant material tension during conveying, preventing wrinkles or breakage.

[0048] 3. Brake locking process

[0049] When the bag-making machine shuts down or requires emergency braking, the electronic control system 7 immediately cuts off power to the magnetic powder brake 3 and simultaneously sends an excitation signal to the magnetic powder brake 5. This rapidly generates a braking torque, which is transmitted to the second gear 42 via the coupling. Because the second gear 42 meshes with the first gear 41, the braking torque is further transmitted to the entire gear transmission system, forcing the unwinding reel 6 to immediately stop rotating, effectively preventing the material from slacking or accumulating due to continued unwinding due to inertia.

[0050] In one embodiment of the present application, Figure 1-Figure 4 As shown, the magnetic powder brake 3 is fixedly connected to the top of the support frame 2 through a bolt group, a bearing is provided between the output shaft 31 and the support frame 2, and the bottom end of the output shaft 31 is fixed to the first gear 41 through a flat key.

[0051] It can be understood that when the magnetic powder brake 3 is powered on and working, the internal magnetic powder forms a magnetic chain under the action of the excitation current, driving the output shaft 31 to rotate;

[0052] The output shaft 31 drives the first gear 41 to rotate synchronously through a flat key. The bearing reduces the frictional resistance between the output shaft 31 and the support frame 2, ensuring the rotation accuracy;

[0053] When stopping, the magnetic powder brake 3 is powered off, the internal magnetic powder demagnetizes and loosens, the output shaft 31 stops rotating, and the flat key synchronously blocks the power input of the first gear 41, cooperating with the magnetic powder brake 5 to achieve rapid braking.

[0054] In an embodiment of the present application, as Figure 1-Figure 4 shown, the shaft end of the second gear 42 is rigidly connected to the input shaft of the magnetic powder brake 5 through a coupling, and the magnetic powder brake 5 is fixed to the side of the mounting frame 1 through a bracket 52.

[0055] It can be understood that the shaft end of the second gear 42 and the input shaft of the magnetic powder brake 5 are connected through a rigid coupling, and both ends of the coupling are fixed in the shaft end positioning grooves with set screws. The magnetic powder brake 5 is fixed to the side vertical plate of the mounting frame 1 through a bracket 52, ensuring no晃动 during braking.

[0056] During equipment operation: the magnetic powder brake 5 is powered off, the internal magnetic powder is loose, and the input shaft can rotate freely; the second gear 42 drives the input shaft of the magnetic powder brake 5 to rotate idly through the coupling, without affecting the power transmission of the gear transmission group, and the unwinding reel 6 unwinds normally.

[0057] When the equipment stops: the electronic control system 7 powers on the magnetic powder brake 5, the internal magnetic powder forms a chain under the action of the magnetic field, and the input shaft is locked; the braking torque is transmitted to the second gear 42 through the coupling, and the second gear 42 meshes with the first gear 41 for braking, forcing the entire gear group to stop rotating, achieving rapid locking of the unwinding reel 6.

[0058] In an embodiment of the present application, as Figure 1-Figure 4 shown, the third gear 43 and the fourth gear 44 have the same module, and the diameter of the first gear 41 is smaller than the diameters of the second gear 42 and the third gear 43, forming a speed reduction transmission structure.

[0059] It can be understood that the modules of the third gear 43 and the fourth gear 44 are both 2 mm (example value), that is, the pitch π×module is the same, ensuring that the tooth dimensions match, enabling stable meshing transmission, and avoiding slipping or jamming.

[0060] The diameter of the first gear 41 is D1, the diameter of the second gear 42 is D2, and the diameter of the third gear 43 is D3, forming a structure where D1 < D2 and D1 < D3.

[0061] The output shaft 31 drives the first gear 41 to rotate at a speed of n1, which in turn drives the third gear 43 through meshing to rotate at a speed of n2 = n1 / i2 = n1 / 2. The speed is then reduced by the fourth gear 44 to a speed of n3 = n2 × (D3 / D4) = n1 / 3, which drives the unwinding reel 6. As the speed is reduced, the torque is amplified by the transmission ratio (for example, input torque T1, output torque T3 = T1 × itotal = 3T1), allowing the magnetic powder brake 3 to accurately control the unwinding tension under high torque loads.

[0062] When the machine is stopped, the magnetic powder brake 5 generates a braking torque Tbrake through the second gear 42. When it is transmitted to the third gear 43 through the first gear 41, the torque is amplified to Tbrake×i2=2Tbrake, and then amplified to Tbrake×itotal=3Tbrake through the fourth gear 44, so that the unwinding reel 6 is quickly locked to prevent the material from loosening.

[0063] In one embodiment of the present application, Figure 1-Figure 4 As shown, the other end of the fourth gear 44 cooperates with the central axis hole of the unwinding drum 6 through a spline shaft, and a locking nut is provided at the end of the spline shaft for axially fixing the unwinding drum 6.

[0064] It is understandable that the external spline shaft extending from the right end of the fourth gear 44 is interference fit with the internal spline hole in the center of the unwinding drum 6. This ensures lossless transmission of circumferential torque while allowing slight adjustment of the unwinding drum 6 in the axial direction.

[0065] The end of the spline shaft axially presses the unwinding drum 6 against the shoulder end face of the fourth gear 44 through a locking nut to prevent axial movement due to vibration during the unwinding process.

[0066] In one embodiment of the present application, Figure 1-Figure 4 As shown, the transmission ratio of the first gear 41 to the second gear 42 is 1:2-1:3, the transmission ratio of the third gear 43 to the fourth gear 44 is 1:1.5-1:2, and the four-stage gear transmission group 4 forms a two-stage reduction structure as a whole.

[0067] It can be understood that in the first stage of reduction, the transmission ratio between the first gear 41 and the second gear 42 is i1 = 1:2 to 1:3 (e.g., i1 = 1:2.5). This means that the relationship between the speed n1 of the first gear 41 and the speed n2 of the second gear 42 is n2 = n1 / i1. For example, when n1 = 100 r / min, n2 = 40 r / min, and the torque is amplified by a factor of i1 (torque T2 = T1 × i1).

[0068] Second-stage reduction: The transmission ratio i2 between third gear 43 and fourth gear 44 is 1:1.5 to 1:2 (e.g., i2 = 1:1.8). The relationship between the speed n3 of third gear 43 and the speed n4 of fourth gear 44 is n4 = n3 / i2. Combined with the first-stage reduction, the total transmission ratio itotal = i1 × i2 = 1:3 to 1:6 (e.g., itotal = 1:4.5), achieving two-stage reduction.

[0069] The output shaft 31 of the magnetic powder brake 3 drives the first gear 41 at a speed of n1. After the first stage of deceleration, the second and third gears 42 and 43 rotate at a speed of n2 = n1 / i1. After a second stage of deceleration, the fourth gear 44 drives the unwinding reel 6 at a speed of n4 = n3 / i2 = n1 / (i1×i2). For example, if n1 = 100 rpm and itotal = 1:4.5, n4 ≈ 22.2 rpm. This speed reduction simultaneously amplifies the torque by a factor of 4.5, making it easier to control the unwinding tension of large-diameter materials.

[0070] During shutdown, the magnetic powder brake 5 generates a braking torque, Tbrake, through the second gear 42. This torque is amplified by the first transmission ratio i1 to Tbrake × i1, and then by the second transmission ratio i2 to Tbrake × i1 × i2 = Tbrake × itotal, quickly locking the unwinding reel 6. For example, if itotal = 4.5, the braking torque is amplified 4.5 times, significantly shortening the braking response time.

[0071] In one embodiment of the present application, Figure 1-Figure 4 As shown, the control circuit of the magnetic powder brake 3 and the control circuit of the magnetic powder brake 5 are connected in parallel to the electronic control system 7 of the bag making machine.

[0072] As will be appreciated, the control coils for magnetic powder brake 3 and 5 are connected in parallel via wires to the output of the bag-making machine's electronic control system 7, forming independent power supply circuits. Electronic control system 7 incorporates an integrated relay module (e.g., two 24V DC relays) to control the on / off state of these two circuits.

[0073] Electronic control logic and workflow

[0074] Equipment operating status:

[0075] The electric control system 7 outputs a 12-24V DC current (e.g., 24V) to the control coil of the magnetic powder brake (3). The internal magnetic powder is linked under the action of the magnetic field, so that the output shaft 31 generates a controllable resistance torque to achieve the discharge tension adjustment; at the same time, the power supply of the magnetic powder brake 5 is cut off, the internal magnetic powder is loose, and the input shaft can rotate freely without affecting the operation of the gear transmission group.

[0076] Equipment shutdown status:

[0077] The electronic control system 7 immediately cuts off the power supply to the magnetic powder brake 3, releasing the tension control; at the same time, the control coil of the magnetic powder brake 5 is energized, the magnetic powder chain locks the input shaft, and the braking torque is transmitted to the entire gear set through the second gear 42, forcing the unwinding reel 6 to stop rotating.

[0078] Interlock protection mechanism: The program logic of the electronic control system 7 is set so that the two relay states are mutually exclusive, avoiding the magnetic powder brake 3 and the magnetic powder brake 5 being energized at the same time, and preventing functional conflicts from causing equipment failure.

[0079] In one embodiment of the present application, Figure 1-Figure 4 As shown, the first gear 41 , the second gear 42 , the third gear 43 and the fourth gear 44 are all helical gears with the same helix angle. The first gear 41 and the second gear 42 rotate in opposite directions, and the third gear 43 and the fourth gear 44 rotate in opposite directions.

[0080] It can be understood that the first gear 41, the second gear 42, the third gear 43, and the fourth gear 44 are all involute bevel gears, the first gear 41 is right-handed, and the second gear 42 is left-handed; the third gear 43 is right-handed, and the fourth gear 44 is left-handed, forming an alternating rotation layout of "right-handed-left-handed-right-handed-left-handed".

[0081] The helical tooth surfaces of helical gears cause axial sliding when the teeth mesh, increasing the meshing line length compared to spur gears and reducing impact and noise. For example, when the right-handed tooth surface of the first gear 41 meshes with the left-handed tooth surface of the second gear 42, the contact line gradually transitions from one end of the tooth width to the other, improving transmission smoothness.

[0082] When the first gear 41 rotates clockwise and drives the second gear 42 to rotate counterclockwise, the axial forces generated by the two are in opposite directions (the axial force of the first gear 41 is to the left, and the axial force of the second gear 42 is to the right), which cancel each other out through the bearing; similarly, when the third gear 43 rotates clockwise and engages with the fourth gear 44 counterclockwise, the axial forces also cancel each other out, reducing the bearing load and extending the service life.

[0083] It should be noted that the control method of the present application can be automatically controlled by a controller, and the control method of the controller can be implemented by simple programming by technicians in this field, which is common knowledge in this field. In addition, the present application is mainly used to protect mechanical structures, so the control method and circuit connection are no longer explained in detail in this application.

[0084] Specifically, the usage process in actual implementation:

[0085] 1. Equipment startup and power transmission

[0086] The operator turns on the bag-making machine's electronic control system 7, which supplies 24V DC current to the magnetic powder brake 3. The magnetic powder within the brake forms a chain, driving the output shaft 31 to rotate at 100 rpm. The output shaft 31, via a key, drives the first gear 41 in synchronous rotation. The first gear 41 meshes with the left-hand second gear 42 (left-hand rotation) and the right-hand third gear 43 (right-hand rotation), respectively, forming a 1:2 reduction gear. The third gear 43 drives the left-hand fourth gear 44 at 22.2 rpm. The splined shaft of the fourth gear 44 drives the unwinding reel 6 to begin unwinding. At this point, the magnetic powder brake 5 is de-energized, and the input shaft idles along with the second gear 42.

[0087] 2. Tension adjustment during operation

[0088] When unwinding a 0.08mm thick PE film, the operator sets the current of the magnetic powder brake 3 to 1.2A via the electronic control system 7. Output shaft 31 generates a 10N·m drag torque, which is amplified to 30N·m by the gear train and acts on the unwinding reel 6, maintaining the material tension at around 15N. If wrinkles occur in the material, the current can be increased to 1.5A, increasing the drag torque to 12.5N·m and the tension to 18N simultaneously, ensuring smooth material delivery.

[0089] 3. Stop and brake lock

[0090] When the bag-making machine needs to shut down, the operator presses the stop button, and the electronic control system 7 cuts off the power to the magnetic powder brake 3 while simultaneously supplying a 3A current to the magnetic powder brake 5. The magnetic powder within the magnetic powder brake 5 forms a chain, locking the shaft end of the second gear 42 via the coupling. The braking torque is amplified 4.5 times via the second gear 42, the first gear 41, the third gear 43, and the fourth gear 44, resulting in a braking torque of 135 N·m, which stops the unwinding reel 6. At this point, the magnetic powder brake 3 loses its magnetism and releases, disconnecting the power supply from the output shaft 31 to the gear train, completing the shutdown protection.

[0091] In summary, the bag making machine discharge brake device of the embodiment of the present application realizes the coordinated work of dual magnetic powder elements through a four-stage gear transmission group, solves the contradiction between automatic loading and power-off braking, simplifies the equipment structure, and the magnetic powder brake independently controls the discharge tension, which can be automatically adjusted according to the material thickness and material to improve the bag making accuracy. The magnetic powder brake directly locks the reel through gear transmission, effectively preventing material loosening, reducing maintenance costs and time, saving labor, improving production efficiency, and reducing scrap rate.

[0092] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0093] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0094] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and deform the above embodiments within the scope of the present application.

Claims

1. The bag making machine discharge brake device is characterized by: It comprises a mounting frame (1), a supporting frame (2), a magnetic powder brake (3), a four-stage gear transmission group (4), a magnetic powder brake (5) and a discharge reel (6), wherein: The support frame (2) is fixedly arranged on the mounting frame (1); The magnetic powder brake (3) is arranged on the top of the support frame (2), and its output shaft (31) passes through the support frame (2) downward; The four-stage gear transmission set (4) comprises: a first gear (41) fixed to the bottom end of the output shaft (31); a second gear (42) meshing with the first gear (41) on one side, and the magnetic powder brake (5) is mounted on an axial end of the second gear (42); a third gear (43) meshing with the first gear (41) on the other side; A fourth gear (44) is meshed with the third gear (43), and the other end of the fourth gear (44) is connected to the unwinding reel (6).

2. The bag making machine unloading brake device according to claim 1, characterized in that: The magnetic powder brake (3) is fixedly connected to the top of the support frame (2) via a bolt group, a bearing is provided between the output shaft (31) and the support frame (2), and the bottom end of the output shaft (31) is fixed to the first gear (41) via a flat key.

3. The bag making machine unloading brake device according to claim 1, characterized in that: The shaft end of the second gear (42) is rigidly connected to the input shaft of the magnetic powder brake (5) through a coupling, and the magnetic powder brake (5) is fixed to the side of the mounting frame (1) through a bracket (52).

4. The bag making machine unloading brake device according to claim 1, characterized in that: The third gear (43) and the fourth gear (44) have the same module, and the diameter of the first gear (41) is smaller than the diameters of the second gear (42) and the third gear (43), forming a reduction transmission structure.

5. The bag making machine unloading brake device according to claim 1, characterized in that: The other end of the fourth gear (44) is matched with the central axis hole of the unwinding drum (6) through a spline shaft, and a locking nut is provided at the end of the spline shaft for axially fixing the unwinding drum (6).

6. The bag making machine unloading brake device according to claim 1, characterized in that: The transmission ratio between the first gear (41) and the second gear (42) is 1:2-1:3, the transmission ratio between the third gear (43) and the fourth gear (44) is 1:1.5-1:2, and the four-stage gear transmission group (4) as a whole forms a two-stage reduction structure.

7. The bag making machine unloading brake device according to claim 1, characterized in that: The control circuit of the magnetic powder brake (3) and the control circuit of the magnetic powder brake (5) are connected in parallel to the electric control system (7) of the bag making machine, and the electric control system (7) is configured as follows: When the equipment is running, activating the magnetic powder brake (3) and releasing the magnetic powder brake (5); When the equipment stops, the magnetic powder brake (3) is released and the magnetic powder brake (5) is activated.

8. The bag making machine unloading brake device according to claim 1, characterized in that: The first gear (41), the second gear (42), the third gear (43) and the fourth gear (44) are all helical gears with the same helical angle. The first gear (41) and the second gear (42) have opposite rotation directions, and the third gear (43) and the fourth gear (44) have opposite rotation directions.

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