Belt thickness adjusting mechanism

Abstract

According to the technical scheme, the belt thickness adjusting mechanism is characterized by comprising a packing belt channel and a driven wheel, a gap is formed between the packing belt channel and the driven wheel, a packing belt penetrates through the gap, the belt thickness adjusting mechanism further comprises an eccentric shaft, the driven wheel is arranged on the eccentric shaft, and the eccentric shaft drives the driven wheel to be away from or close to the packing belt channel when rotating. A swing rod is arranged on the eccentric shaft, the swing rod drives the eccentric shaft to rotate, and the device further comprises a driving assembly used for adjusting the rotating angle of the swing rod. Stepless dynamic adjustment of the gap between the driven wheel and the packing belt channel can be achieved, equipment is compatible with packing belts of different thicknesses, the universality of the equipment is improved, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of packaging machinery technology, and more specifically to a thickness adjustment mechanism. Background Technology

[0002] During operation, the strapping strap passes through the gap between the strapping strap channel and the driven roller. However, existing strapping machines typically lack a strap thickness adjustment mechanism; the distance between the driven roller and the strapping strap channel is fixed. This limits the versatility of the equipment, as operators can only use strapping straps of specific thicknesses. Observations have revealed that the variety of goods requiring strapping is vast, necessitating the redesign of the strapping strap channel size to accommodate different goods sizes. This increases production costs and reduces efficiency for businesses. Utility Model Content

[0003] To solve the above problems, this utility model provides the following technical solution:

[0004] A strapping thickness adjustment mechanism includes a strapping channel and a driven wheel, with a gap between the strapping channel and the driven wheel, through which the strapping passes. It also includes an eccentric shaft, on which the driven wheel is mounted. When the eccentric shaft rotates, it causes the driven wheel to move away from or closer to the strapping channel, thus changing the size of the gap. A rocker arm is mounted on the eccentric shaft, which drives the eccentric shaft to rotate. The mechanism also includes a drive assembly for adjusting the rotation angle of the rocker arm.

[0005] The present invention is further configured such that: the driving assembly includes an adjusting block, an adjusting bolt is threadedly connected to the adjusting block and located below the swing arm in the vertical direction, the adjusting bolt is in contact with the swing arm, and a tension spring is also provided on the swing arm; when the adjusting bolt moves upward, it drives the swing arm to rotate upward, and when the adjusting bolt moves downward, the tension spring pulls the swing arm to rotate downward, so that the swing arm abuts against the adjusting bolt.

[0006] The present invention is further configured to include a frame, wherein the packing strap channel and the eccentric shaft are both disposed on the frame, and a fixing pin is disposed below the swing arm on the frame, wherein one end of the tension spring is connected to the swing arm and the other end is connected to the fixing pin.

[0007] The present invention is further configured such that: a mounting plate is provided on the frame and below the swing arm, and the fixing pin is threaded to the mounting plate in the vertical direction.

[0008] The present invention is further configured such that: an incised opening is provided on the adjusting block, the swing rod passes through the incised opening, and the adjusting bolt is inserted into the incised opening from the bottom of the adjusting block.

[0009] The present invention is further configured such that: the passive wheel is fixed to one end of the eccentric shaft, the swing arm is fixed to the other end of the eccentric shaft, and the swing arm is perpendicular to the eccentric shaft.

[0010] The present invention is further configured such that: one end of the swing arm is fixed to the eccentric shaft, and the tension spring is connected to the other end of the swing arm.

[0011] The present invention is further configured such that: the adjusting block is located between the eccentric shaft and the tension spring, and the adjusting block is closer to the tension spring.

[0012] Compared with the prior art, the present invention has at least the following advantages:

[0013] 1. Through the linkage design of the eccentric shaft and the swing arm, stepless dynamic adjustment of the gap between the driven wheel and the strapping channel is achieved, making the equipment compatible with strapping of different thicknesses. The structural design of the eccentric shaft simplifies the mechanical transmission path of the adjustment action, ensuring a stable and reliable adjustment process. Operators can quickly adapt to various specifications of strapping without replacing parts or stopping the machine to modify the channel, significantly improving the equipment's versatility and reducing production costs.

[0014] 2. When the adjusting bolt is turned upwards, it will lift the swing arm upwards, indirectly causing the eccentric shaft to rotate counterclockwise, increasing the gap between the driven wheel and the strapping channel. When the adjusting bolt is turned downwards, the tension spring will automatically pull the swing arm downwards to reset, indirectly causing the eccentric shaft to rotate counterclockwise, reducing the gap between the driven wheel and the strapping channel. The operator only needs to turn one bolt to achieve adjustment, reducing manual operation intensity and improving adjustment efficiency.

[0015] 3. By setting an indentation on the adjusting block and allowing the swing arm to pass through, the swing arm will abut against the top of the indentation when it rotates upward to a certain angle, thus limiting the rotation angle and travel of the swing arm and making the adjustment more stable and precise.

[0016] 4. Connect the tension spring to the end of the swing arm to reduce the required spring tension, and set the adjustment block near the end of the tension spring to shorten the lever arm distance between the adjustment bolt and the swing arm fulcrum, making the adjustment easier and more sensitive; at the same time, the compact layout design optimizes space utilization and is suitable for miniaturized or highly integrated packing machines. Attached Figure Description

[0017] Figure 1 This is a frontal view of this embodiment;

[0018] Figure 2 This is a rear view of this embodiment;

[0019] Figure 3 This is the first view of the eccentric axis section;

[0020] Figure 4 This is the second perspective view of the eccentric axis section.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Frame; 2. Packing strap channel; 3. Driven wheel; 4. Eccentric shaft; 5. Swing arm; 6. Adjusting block; 7. Adjusting bolt; 8. Tension spring; 9. Fixing pin; 10. C-shaped opening. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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.

[0025] A thickness adjustment mechanism, such as Figure 1 As shown, the device includes a strapping channel 2 and a driven wheel 3. There is a gap between the strapping channel 2 and the driven wheel 3. When the strapping machine is running, the strapping moves along the strapping channel 2 and passes through the gap between the strapping channel 2 and the driven wheel 3.

[0026] like Figures 2 to 4 As shown, the thickness adjustment mechanism also includes an eccentric shaft 4, and a driven wheel 3 is mounted on the eccentric shaft 4. Since the end face of the eccentric shaft 4 is shaped like an eccentric wheel, when the eccentric shaft 4 rotates, it can drive the driven wheel 3 away from or closer to the strapping channel 2, thereby changing the gap size and making the equipment compatible with strapping of different thicknesses.

[0027] An eccentric shaft 4 is equipped with a rocker arm 5, which drives the eccentric shaft 4 to rotate. The shaft also includes a drive assembly for adjusting the rotation angle of the rocker arm 5. Operators adjust the rotation angle of the rocker arm 5 via the drive assembly, indirectly driving the eccentric shaft 4 to rotate, thereby adjusting the gap size.

[0028] The drive assembly includes an adjusting block 6, on which an adjusting bolt 7 is threaded vertically below the rocker arm 5. The adjusting bolt 7 contacts the rocker arm 5, with its top end abutting against the bottom side of the rocker arm 5. The assembly also includes a tension spring 8 mounted on the rocker arm 5, which tends to pull the rocker arm 5 downwards. When the adjusting bolt 7 moves upwards, it pushes the rocker arm 5 upwards, causing it to rotate upwards. During this rotation, the rocker arm 5 overcomes the tension of the tension spring 8. When the adjusting bolt 7 moves downwards, the tension spring 8 returns to its original position, pulling the rocker arm 5 downwards, ensuring that the rocker arm 5 remains in contact with the adjusting bolt 7, thus adjusting the upward and downward rotation of the rocker arm 5.

[0029] The thickness adjustment mechanism also includes an integral frame 1. The packing strap channel 2 and the eccentric shaft 4 are both set on the frame 1. The frame 1 is located below the swing arm 5 and a fixing pin 9 is provided. One end of the tension spring 8 is connected to the swing arm 5, and the other end is connected to the fixing pin 9, so that the tension spring 8 has the tendency to pull the swing arm 5 downward.

[0030] A mounting plate is installed on the frame 1 and below the swing arm 5. The mounting plate is horizontally positioned, and a fixing pin 9 is threaded vertically onto the mounting plate. This allows the fixing pin 9 to be adjusted in height vertically. A tension spring 8 is hooked onto the ring at the top of the fixing pin 9. By adjusting the height of the fixing pin 9, the distance between it and the swing arm 5 can be changed, allowing for the use of tension springs 8 of different lengths or models. Alternatively, the tension of the tension spring 8 can be adjusted by changing the distance.

[0031] The adjusting block 6 is fixed to the frame 1. A C-shaped opening 10 is provided through the side wall of the adjusting block 6. The swing rod 5 extends towards the adjusting block 6 and passes through the C-shaped opening 10. The adjusting bolt 7 passes through the C-shaped opening 10 from the bottom of the adjusting block 6 and abuts against the swing rod 5. When the swing rod 5 rotates upward to a certain angle, it abuts against the top of the C-shaped opening 10, which limits the rotation angle stroke of the swing rod 5, making the adjustment more stable and precise. At the same time, it also has a certain limiting effect on the lateral displacement of the swing rod 5 during rotation.

[0032] In this embodiment, the eccentric wheel is rotatably connected to the frame 1, the driven wheel 3 is fixed to the end face of one end of the eccentric shaft 4, and the rocker arm 5 is fixed to the other end of the eccentric shaft 4. Furthermore, the rocker arm 5 is perpendicular to the eccentric shaft 4 and extends in a direction perpendicular to the eccentric shaft 4, allowing the rocker arm 5 to more easily drive the eccentric shaft 4 to rotate.

[0033] In this embodiment, one end of the rocker arm 5 is fixed to the eccentric shaft 4, while the tension spring 8 is fixed to the other end of the rocker arm 5. The lever principle is used to reduce the required spring tension and reduce the driving resistance of the adjusting bolt 7, making manual adjustment easier. In addition, the end connection method can also disperse the stress of the tension spring 8 and avoid local fatigue fracture of the rocker arm 5.

[0034] In this embodiment, the adjusting block 6 is located between the eccentric shaft 4 and the tension spring 8, and the adjusting block 6 is closer to the tension spring 8. The end of the rocker arm 5 connected to the tension spring 8 is end A, and the end of the rocker arm 5 connected to the eccentric shaft 4 is end B. The distance between the adjusting block 6 and end A is smaller than the distance between the adjusting block 6 and end B. By arranging the adjusting block 6, the lever arm distance between the adjusting bolt 7 and the fulcrum of the rocker arm 5 is optimized, further improving the adjustment sensitivity.

[0035] The working process of this utility model is as follows:

[0036] When the operator tightens the adjusting bolt 7 to raise it, the adjusting bolt 7 pushes the swing arm 5 upward, causing the swing arm 5 and the eccentric shaft 4 to rotate counterclockwise. This moves the driven wheel 3 away from the strapping channel 2, increasing the gap to accommodate thicker strapping. When the adjusting bolt 7 is tightened in the opposite direction to lower it, the tension spring 8 automatically pulls the swing arm 5 downward, keeping it in contact with the adjusting bolt 7. This causes the swing arm 5 and the eccentric shaft 4 to rotate clockwise, bringing the driven wheel 3 closer to the strapping channel 2. This reduces the gap to accommodate thinner strapping. The compact layout design of this utility model optimizes space utilization, avoids internal motion interference, and is suitable for miniaturized or highly integrated strapping machines.

[0037] It should be noted that in this embodiment, the rocker arm 5 is located on the right side of the eccentric shaft 4. In other embodiments, it can also be located on the left side. When it is located on the left side, the adjustment direction of the adjusting bolt 7 is reversed, but the structural principle is the same.

[0038] 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 design concept of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A strapping thickness adjustment mechanism, comprising a strapping channel and a driven wheel, wherein a gap exists between the strapping channel and the driven wheel, and the strapping passes through the gap, characterized in that: It also includes an eccentric shaft, on which the driven wheel is mounted. When the eccentric shaft rotates, it causes the driven wheel to move away from or closer to the packing strap channel, thus changing the size of the gap. A rocker arm is mounted on the eccentric shaft, which drives the eccentric shaft to rotate. It also includes a drive assembly for adjusting the rotation angle of the rocker arm.

2. The thickness adjustment mechanism according to claim 1, characterized in that: The drive assembly includes an adjustment block, on which an adjustment bolt is threaded vertically below the swing arm. The adjustment bolt contacts the swing arm. The assembly also includes a tension spring on the swing arm. When the adjustment bolt moves upward, it drives the swing arm to rotate upward. When the adjustment bolt moves downward, the tension spring pulls the swing arm to rotate downward, causing the swing arm to abut against the adjustment bolt.

3. The thickness adjustment mechanism according to claim 2, characterized in that: It also includes a frame, on which the packing strap channel and the eccentric shaft are both mounted. A fixing pin is provided on the frame below the swing arm. One end of the tension spring is connected to the swing arm, and the other end is connected to the fixing pin.

4. The thickness adjustment mechanism according to claim 3, characterized in that: A mounting plate is provided on the frame and below the swing arm, and the fixing pin is threaded to the mounting plate in the vertical direction.

5. The thickness adjustment mechanism according to claim 2, characterized in that: The adjusting block has an incised opening, the swing rod passes through the incised opening, and the adjusting bolt is inserted into the incised opening from the bottom of the adjusting block.

6. The thickness adjustment mechanism according to claim 2, characterized in that: The passive wheel is fixed to one end of the eccentric shaft, and the swing arm is fixed to the other end of the eccentric shaft. The swing arm is perpendicular to the eccentric shaft.

7. The thickness adjustment mechanism according to claim 6, characterized in that: One end of the swing arm is fixed to the eccentric shaft, and the tension spring is connected to the other end of the swing arm.

8. The thickness adjustment mechanism according to claim 7, characterized in that: The adjusting block is located between the eccentric shaft and the tension spring, and the adjusting block is closer to the tension spring.

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