Bag making machine feed brake device

Abstract

The utility model discloses a bag making machine discharging brake device, including mounting bracket, support frame, magnetic powder brake, four stage gear transmission group, magnetic powder brake and discharging reel, wherein, support frame fixed setting is on mounting bracket, magnetic powder brake sets up at the top of support frame, and its output shaft is downward and penetrates support frame, four stage gear transmission group includes: the first gear fixed in the bottom of output shaft, one side and the meshing of first gear second gear, and the axle end mounting of second gear has magnetic powder brake, the meshing of first gear third gear on the other side, the meshing of fourth gear with third gear, and the other end of fourth gear connects discharging reel. Therefore, through four stage gear transmission group, the collaborative work of double magnetic powder element is realized, solves the contradiction of automatic feeding and power-off brake, and the reel is directly locked by magnetic powder brake through gear transmission, effectively prevents material relaxation, reduces maintenance cost and time, saves manual work, improves production efficiency, reduces the rate of waste.

Description

Technical Field

[0001] This utility model relates to the technical field of bag making machine equipment, and in particular to a bag making machine feeding brake device. Background Technology

[0002] During the operation of a bag-making machine, the stability of the feeding system directly affects product quality and production efficiency. Traditional bag-making machines typically use a single mechanical or electromagnetic brake structure for their feeding braking devices, which presents the following problems:

[0003] 1. Material loosening problem during machine shutdown: When the equipment suddenly stops or loses power, the unloading reel often continues to rotate due to inertia, causing the material to loosen, pile up or even become tangled, requiring manual reorganization, which wastes time and materials.

[0004] 2. Inaccurate tension control: Existing braking devices are difficult to achieve precise control of the material release tension, especially during high-speed production, which can easily lead to tension fluctuations, resulting in bag size deviations or material breakage.

[0005] 3. Conflict between automatic feeding and braking functions: If a power-off braking device is installed, the automatic feeding function cannot be realized, and manual assistance is required for feeding, which increases labor intensity; if an automatic feeding device is installed, the roll cannot be effectively locked when the machine stops.

[0006] There is an urgent need for a material discharge brake device that is compact in structure, integrates functions, and can be precisely controlled. Utility Model Content

[0007] This utility model aims to at least partially solve one of the technical problems in the related art.

[0008] Therefore, the purpose of this utility model is to propose a material feeding brake device for a bag making machine. Through a four-stage gear transmission group, the dual magnetic powder elements work in concert, which solves the contradiction between automatic feeding and power-off braking, simplifies the equipment structure, and the magnetic powder brake independently controls the feeding tension. It can be automatically adjusted according to the material thickness and material, improving the bag making accuracy. The magnetic powder brake directly locks the roll through gear transmission, effectively preventing material loosening, reducing maintenance costs and time, saving labor, improving production efficiency, and reducing the scrap rate.

[0009] To achieve the above objectives, this utility model proposes a material feeding brake device for a bag making machine, comprising a mounting frame, a support frame, a magnetic powder brake, a four-stage gear transmission group, and a material feeding drum. The support frame is fixedly mounted on the mounting frame; the magnetic powder brake is located at the top of the support frame, with its output shaft penetrating downwards through the support frame; 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, with the magnetic powder brake mounted on the shaft end of the second gear; a third gear meshing with the first gear on the other side; and a fourth gear meshing with the third gear, with the other end of the fourth gear connected to the material feeding drum.

[0010] This utility model's bag-making machine feeding brake device achieves the coordinated work of dual magnetic powder elements through a four-stage gear transmission group, resolving the contradiction between automatic feeding and power-off braking, simplifying the equipment structure, and allowing the magnetic powder brake to independently control the feeding tension, automatically adjusting according to material thickness and material properties to improve bag-making accuracy. The magnetic powder brake directly locks the roll shaft 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 feeding brake device proposed in the above application may also have the following additional technical features:

[0012] Specifically, the magnetic powder brake is fixedly connected to the top of the support frame by 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 by a flat key.

[0013] Specifically, the shaft end of the second gear is rigidly connected to the input shaft of the magnetic powder brake via a coupling, and the magnetic powder brake is fixed to the side of the mounting bracket via a bracket.

[0014] Specifically, 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 speed reduction transmission structure.

[0015] Specifically, the other end of the fourth gear is engaged with the central shaft hole of the feeding drum via a splined shaft, and the end of the splined shaft is provided with a locking nut for axially fixing the feeding drum.

[0016] Specifically, the transmission ratio between the first gear and the second gear is 1:2-1:3, and the transmission ratio between the third gear and the fourth gear is 1:1.5-1:2. The four-stage gear transmission group forms a two-stage reduction structure.

[0017] Specifically, the control circuit of the magnetic powder brake is connected in parallel to the electrical control system of the bag-making machine, and the electrical control system is configured as follows:

[0018] When the equipment is running, the magnetic powder brake is activated and then released.

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

[0020] Specifically, the first gear, the second gear, the third gear, and the fourth gear are all helical gears with the same helix angle. The first gear and the second gear have opposite helical directions, and the third gear and the fourth gear have opposite helical directions.

[0021] The advantages of this invention compared to existing technologies are as follows:

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

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

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

[0025] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0027] Figure 1 This is a perspective view of a bag-making machine feeding brake device according to an embodiment of the present invention;

[0028] Figure 2 This is a perspective view of the material feeding brake device of a bag making machine according to another embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the planar structure of the material feeding brake device of a bag making machine according to an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the control connection of the material feeding brake device of a bag making machine according to an embodiment of the present invention.

[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. Unloading drum; 7. Electrical control system. Detailed Implementation

[0032] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. Rather, the embodiments of the present invention include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0033] The following description, in conjunction with the accompanying drawings, describes the material feeding brake device of the bag-making machine according to an embodiment of the present invention.

[0034] like Figures 1-4 As shown, the bag-making machine feeding brake device of this utility model embodiment 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 feeding drum 6.

[0035] It is understood that the support frame 2 is vertically fixed to the top plane of the mounting frame 1 by bolts 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 via a flange, and its output shaft 31 extends vertically downward and passes through a pre-set shaft hole in 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 rotates synchronously with the output shaft 31.

[0038] The second gear 42 is located to the left of the first gear 41, and its teeth mesh with those of the first gear 41, with 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 torque transmission without loss.

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

[0040] The fourth gear 44 meshes with the third gear 43 on the right side, forming a two-stage reduction transmission. The right end of the central shaft of the fourth gear 44 is machined with a splined shaft, which mates with the central splined hole of the unloading drum 6 to achieve circumferential torque transmission and axial sliding adjustment.

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

[0042] After the central spline hole of the feeding drum 6 is engaged with the spline shaft of the fourth gear 44, the locking nut is tightened at the end of the spline shaft to prevent axial movement of the feeding drum 6 during rotation by using axial preload.

[0043] Workflow:

[0044] 1. Power transmission path

[0045] When the bag-making machine starts, the power source drives the output shaft 31 of the magnetic powder brake 3 to rotate, and the output shaft 31 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 fourth gear 44, which meshes with it, to rotate, and finally drives the unwinding drum 6 to rotate through the spline shaft of the fourth gear 44, realizing the unwinding of the packaging material.

[0046] 2. Tension control mechanism

[0047] During unwinding, the magnetic powder brake 3 adjusts its output torque in real time via the electronic control system 7 to control the unwinding 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; conversely, the excitation current is decreased. In this way, the material maintains constant tension during transport, preventing wrinkles or breakage.

[0048] 3. Brake locking process

[0049] When the bag-making machine stops or requires emergency braking, the electrical control system 7 immediately cuts off the power to the magnetic powder brake 3 and simultaneously sends an excitation signal to the magnetic powder brake 5. The magnetic powder brake 5 quickly generates braking torque, which is transmitted to the second gear 42 through the coupling. Since 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 drum 6 to stop rotating immediately, effectively preventing the material from slackening or piling up due to inertia.

[0050] In one embodiment of this utility model, such as Figures 1-4 As shown, the magnetic powder brake 3 is fixedly connected to the top of the support frame 2 by a bolt group, and a bearing is provided between the output shaft 31 and the support frame 2. The bottom end of the output shaft 31 is fixed to the first gear 41 by 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 exciting 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 loses magnetism 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 utility model, as Figures 1-4 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 shaking 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 electric 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 utility model, as Figures 1-4 shown, the module of the third gear 43 and the fourth gear 44 is the same, 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 both the third gear 43 and the fourth gear 44 are 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. <00001​​

[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 to rotate at a speed of n2 = n1 / i2 = n1 / 2. The speed is then reduced to n3 = n2 × (D3 / D4) = n1 / 3 by the fourth gear 44, which drives the unloading drum 6. As the speed decreases, the torque is amplified by the transmission ratio (e.g., input torque T1, output torque T3 = T1 × itotal = 3T1), which facilitates the magnetic powder brake 3 to accurately control the unloading tension of the high torque load.

[0062] When the machine stops, the magnetic powder brake 5 generates a braking torque T brake through the second gear 42. When it is transmitted to the third gear 43 through the first gear 41, the torque is amplified to T brake × i 2 = 2T brake. Then it is amplified to T brake × i total = 3T brake through the fourth gear 44, so that the unloading drum 6 can be locked quickly to prevent the material from loosening.

[0063] In one embodiment of this utility model, such as Figures 1-4 As shown, the other end of the fourth gear 44 is engaged with the central shaft hole of the feeding drum 6 through a spline shaft. The end of the spline shaft is provided with a locking nut for axially fixing the feeding drum 6.

[0064] It is understood that the external splined shaft extending from the right end of the fourth gear 44 is interference-fitted with the internal splined hole at the center of the unloading drum 6. This ensures lossless transmission of circumferential torque while allowing for slight axial adjustment of the unloading drum 6.

[0065] The splined shaft end uses a locking nut to axially press the unloading drum 6 against the shoulder end face of the fourth gear 44 to prevent axial movement caused by vibration during unloading.

[0066] In one embodiment of this utility model, such as Figures 1-4 As shown, the transmission ratio between the first gear 41 and the second gear 42 is 1:2-1:3, and the transmission ratio between the third gear 43 and the fourth gear 44 is 1:1.5-1:2. The four-stage gear transmission group 4 forms a two-stage reduction structure.

[0067] In this context, it can be understood that the first stage of reduction involves a transmission ratio i1 between the first gear 41 and the second gear 42, ranging from 1:2 to 1:3 (e.g., i1 = 1:2.5). This means the relationship between the rotational speed n1 of the first gear 41 and the rotational 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 the third gear 43 and the fourth gear 44 is 1:1.5 to 1:2 (e.g., i2 = 1:1.8). The relationship between the speed n3 of the third gear 43 and the speed n4 of the 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 to rotate at a speed of n1. After the first stage of reduction, the second gear 42 and the third gear 43 rotate at a speed of n2 = n1 / i1. After the second stage of reduction, the fourth gear 44 drives the unloading drum 6 at a speed of n4 = n3 / i2 = n1 / (i1 × i2). For example, when n1 = 100 r / min and itotal = 1:4.5, n4 ≈ 22.2 r / min. The speed is reduced while the torque is increased by 4.5 times, which makes it easier to control the unloading tension of large diameter materials.

[0070] When the machine stops, the magnetic powder brake 5 generates a braking torque Tbrake through the second gear 42. This torque is amplified to Tbrake × i1 by the first-stage transmission ratio i1, and then amplified to Tbrake × i1 × i2 = Tbrake × itotal by the second-stage transmission ratio i2, causing the unloading drum 6 to lock quickly. If itotal = 4.5, the braking torque is amplified by 4.5 times, and the braking response time is significantly shortened.

[0071] In one embodiment of this utility model, such as Figures 1-4 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 electrical control system 7 of the bag making machine.

[0072] It is understood that the control coils of magnetic powder brake 3 and magnetic powder brake 5 are connected in parallel to the output terminal of the bag-making machine's electrical control system 7 via wires, forming an independent power supply circuit. The electrical control system 7 integrates relay modules (such as two 24V DC relays) to control the on / off state of the two circuits respectively.

[0073] Electrical control logic and workflow

[0074] Equipment operating status:

[0075] The electrical control system 7 outputs a 12-24V DC current (such as 24V) to the control coil of the magnetic powder brake (3). The internal magnetic powder forms chains under the action of the magnetic field, which generates a controllable resistance torque on the output shaft 31, thereby realizing the adjustment of the feeding tension. At the same time, the power supply of the magnetic powder brake 5 is cut off, and the internal magnetic powder is loosened, allowing the input shaft to 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 and releases the tension control; at the same time, it energizes the control coil of the magnetic powder brake 5, and the magnetic powder chain locks the input shaft, transmitting the braking torque to the entire gear set through the second gear 42, forcing the unloading drum 6 to stop rotating.

[0078] Interlock protection mechanism: The program logic of the electronic control system 7 is set to mutually exclusive states of the two relays to prevent the magnetic powder brake 3 and the magnetic powder brake 5 from being energized at the same time, thus preventing functional conflicts that could lead to equipment failure.

[0079] In one embodiment of this utility model, such as Figures 1-4 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 have opposite helical directions, and the third gear 43 and the fourth gear 44 have opposite helical directions.

[0080] It is understood that the first gear 41, the second gear 42, the third gear 43, and the fourth gear 44 are all involute helical gears. The first gear 41 is right-handed, 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 rotational layout of "right-handed-left-handed-right-handed-left-handed".

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

[0082] When the first gear 41 rotates to the right and drives the second gear 42 to the left, the axial forces generated by the two gears 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), and they cancel each other out through the bearings. Similarly, when the third gear 43 rotates to the right and the fourth gear 44 rotates to the left, 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 this application can be automatically controlled by a controller. The control method of the controller can be implemented by simple programming by those skilled in the art, which is common knowledge in the field. Furthermore, this application is mainly used to protect mechanical structures, so the control method and circuit connection will not be explained in detail here.

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

[0085] 1. Equipment start-up and power transmission

[0086] The operator connects the power supply to the bag-making machine's electrical control system 7. The electrical control system 7 outputs 24V DC current to the magnetic powder brake 3. The magnetic powder inside the magnetic powder brake 3 forms a chain, driving the output shaft 31 to rotate at a speed of 100 r / min. The output shaft 31 drives the first gear 41 to rotate synchronously via a key. The first gear 41 meshes with the second gear 42 (left-handed) on the left and the third gear 43 (right-handed) on the right, forming a 1:2 reduction transmission. The third gear 43 drives the fourth gear 44 (left-handed) to rotate at a speed of 22.2 r / min. The splined shaft of the fourth gear 44 drives the unwinding drum 6 to start unwinding. At this time, the magnetic powder brake 5 is de-energized, and the input shaft rotates freely with the second gear 42.

[0087] 2. Tension adjustment during operation

[0088] When the unwound material is 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. The output shaft 31 generates a resistance torque of 10N·m, which is amplified to 30N·m through the gear transmission group and acts on the unwound drum 6 to maintain the material tension at around 15N. If material wrinkles occur, the current can be increased to 1.5A, the resistance torque can be increased to 12.5N·m, and the tension can be increased simultaneously to 18N to ensure smooth material conveying.

[0089] 3. Stop and brake locking

[0090] When the bag-making machine needs to be stopped, the operator presses the stop button. The electrical control system 7 cuts off the power to the magnetic powder brake 3 and simultaneously inputs a 3A current to the magnetic powder brake 5. The magnetic powder inside the magnetic powder brake 5 forms a chain, locking the shaft end of the second gear 42 via a coupling. The braking torque is amplified 4.5 times through the second gear 42 → first gear 41 → third gear 43 → fourth gear 44, forming a braking torque of 135 N·m, causing the unloading drum 6 to stop rotating. At this time, the magnetic powder brake 3 loses its magnetism and releases, cutting off the power from the output shaft 31 to the gear transmission group, completing the shutdown protection.

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

[0092] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0093] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0094] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A material feeding brake device for a bag making machine, characterized in that, It includes 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 feeding drum (6), wherein, The support frame (2) is fixedly mounted on the mounting frame (1); The magnetic powder brake (3) is located on the top of the support frame (2), and its output shaft (31) extends downward through the support frame (2); The four-stage gear transmission set (4) includes: The first gear (41) is fixed to the bottom end of the output shaft (31); A second gear (42) meshes with the first gear (41) on one side, and the magnetic powder brake (5) is installed on the shaft end of the second gear (42); A third gear (43) meshes with the first gear (41) on the other side; A fourth gear (44) meshes with the third gear (43), and the other end of the fourth gear (44) is connected to the feed drum (6).

2. The bag-making machine feeding 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) by a bolt group. A bearing is provided between the output shaft (31) and the support frame (2). The bottom end of the output shaft (31) is fixed to the first gear (41) by a flat key.

3. The bag-making machine feeding 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) via a coupling, and the magnetic powder brake (5) is fixed to the side of the mounting bracket (1) via a bracket (52).

4. The bag-making machine feeding 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 diameter of the second gear (42) and the third gear (43), forming a speed reduction transmission structure.

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

6. The bag-making machine feeding 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, and the transmission ratio between the third gear (43) and the fourth gear (44) is 1:1.5-1:

2. The four-stage gear transmission group (4) forms a two-stage reduction structure.

7. The bag-making machine feeding 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 electrical control system (7) of the bag making machine. The electrical control system (7) is configured as follows: When the equipment is running, the magnetic powder brake (3) is activated and the magnetic powder brake (5) is released; When the equipment stops, release the magnetic powder brake (3) and activate the magnetic powder brake (5).

8. The bag-making machine feeding 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 helix angle. The first gear (41) and the second gear (42) have opposite helical directions, and the third gear (43) and the fourth gear (44) have opposite helical directions.

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