Tensioning mechanism of packing machine and packing machine

Abstract

The tensioning mechanism of the packing machine comprises a handle, a first installation base, a main shaft and a one-way rotating assembly, the handle is movably installed on the first installation base through the main shaft, the one-way rotating assembly is connected with the front end of the main shaft, the one-way rotating assembly comprises a ratchet wheel piece, a first pawl and a second pawl, and an installation groove is formed in the front end of the main shaft. The rear end of the ratchet part is arranged in the mounting groove, the pawl seat and the handle rotate synchronously, and the first pawl abuts against and drives the ratchet part to rotate synchronously in the first rotating direction and is movably meshed with the ratchet part in the second rotating direction; the second pawl is movably meshed with the ratchet part in the first rotating direction and abuts against the ratchet part in the second rotating direction. The ratchet wheel is sealed in the packing machine, so that the risk that dirt falls into the gear to cause jamming is effectively prevented; meanwhile, one-way rotation of the ratchet wheel part is achieved, the packing belt is effectively prevented from being damaged due to too high straining speed, overall use is convenient, and performance is stable.

Description

Technical Field

[0001] The utility model relates to the technical field of packing machines, and particularly to a tensioning mechanism and a packing machine of a packing machine. Background Art

[0002] A packing machine is also called a bundling machine or a strapping machine. The portable packing machine has high efficiency and is easy to carry. It is widely used in the packing and bundling of large and small goods in various industries. When packing goods, the goods are usually placed in a packing box, and a packing belt is used to bundle the packing box. The packing machine is used to tighten the packing belt and cut off the redundant part, and weld at the cut-off part.

[0003] In the common packing machines on the market at present, the ratchet part is usually directly connected to the handle through the main shaft and is exposed outside. Dirt falling into the ratchet part easily affects the operation of the packing machine and poses a risk of jamming. Moreover, due to the relatively compact structure, the dirt is not easy to clean. Summary of the Utility Model

[0004] In order to solve the above problems and other problems, the utility model is realized through the following technical solutions: a tensioning mechanism of a packing machine, including a handle, a first mounting seat, a main shaft and a one-way rotating component. The handle is fixedly connected to the main shaft, and the handle drives the main shaft to rotate. The main shaft is movably installed on the first mounting seat, and the front end of the main shaft penetrates into the one-way rotating component. The one-way rotating component includes: a ratchet part, the rear end of the ratchet part is installed in the front end of the main shaft. The ratchet part includes a ratchet and a shaft part. The ratchet is sleeved on the shaft part, and the ratchet rotates synchronously with the shaft part. The rear end of the shaft part is placed in the front end of the main shaft.

[0005] In one embodiment, the one-way rotating component further includes a pawl seat, a first pawl and a first elastic member. The pawl seat is sleeved on the front end of the main shaft, and the pawl seat rotates synchronously with the main shaft. The first elastic member is placed in the pawl seat, and the first pawl is installed in the pawl seat. The first elastic member abuts against the first pawl.

[0006] In one embodiment, the pawl seat, the first pawl rotate synchronously with the main shaft. The first pawl abuts against and drives the ratchet to rotate synchronously in the first rotation direction, and is movably engaged with the ratchet in the second rotation direction.

[0007] In one embodiment, the one-way rotating component further includes a second pawl and a second elastic member. The second pawl is movably installed on the first mounting seat, the second elastic member is fixed on the first mounting seat, and the other end is connected to the second pawl.

[0008] In one embodiment, the second pawl is movably engaged with the ratchet wheel in a first rotation direction, and the second pawl abuts against the ratchet wheel in a second rotation direction.

[0009] The one-way rotation assembly further includes a bearing, which is sleeved on the rear end of the shaft portion and is placed together with the rear end of the shaft portion into the front end of the main shaft.

[0010] In one embodiment, the one-way rotation assembly further includes a gasket, which is sleeved on the rear end of the shaft portion and is located between the ratchet wheel and the main shaft.

[0011] In one embodiment, the handle is provided with a mounting hole, and the main shaft passes through the mounting hole to movably mount the handle on the first mounting seat.

[0012] In one embodiment, the front end of the main shaft is provided with a mounting groove, and the rear end of the shaft portion is mounted in the mounting groove.

[0013] In one embodiment, it further includes a gear assembly, a transmission shaft and a pulling belt assembly. The gear assembly is connected to the ratchet member, one end of the transmission shaft is connected to the gear assembly, and the other end is connected to the pulling belt assembly.

[0014] In one embodiment, it further includes a hinge member and a second mounting seat. The front end of the hinge member is placed into the first mounting seat, and the rear end passes through the second mounting seat and is connected to the pulling belt assembly.

[0015] The present utility model also provides a bundling machine, which includes the tensioning mechanism of any one of the above-mentioned bundling machines.

[0016] Due to the application of the above technical solutions, the present utility model has the following advantages compared with the prior art: The present utility model changes the position and structural layout of the ratchet wheel, encloses the ratchet wheel and the planetary gear set inside the bundling machine, effectively preventing dirt from falling into the gears and causing the risk of jamming. At the same time, in the first rotation direction, the first pawl drives the ratchet member to rotate, and in the second rotation direction, the second pawl abuts against the ratchet member to prevent the ratchet member from rotating, enabling the ratchet member to achieve one-way rotation. When the handle rotates in the second rotation direction after the packing belt is tightened, it will not drive the ratchet wheel to rotate, so that the pulling belt assembly will only tighten the packing belt unidirectionally, effectively preventing the packing belt from being damaged due to too fast tightening speed, and the overall use is convenient and the performance is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It shows a schematic diagram of the bundling machine of the present utility model;

[0018] Figure 2 It shows a schematic diagram of the tensioning mechanism of the present utility model;

[0019] Figure 3Shown is a schematic internal view of the tensioning mechanism of the present utility model;

[0020] Figure 4 Shown is a schematic view of the one-way rotation assembly of the present utility model;

[0021] Figure 5 Shown is a disassembled schematic view of the tensioning mechanism of the present utility model;

[0022] Figure 6 Shown is an installation schematic view of the ratchet member and the main shaft of the present utility model;

[0023] Figure 7 Shown as Figure 6 cross-sectional view.

[0024] 1 - Tensioning mechanism; 11 - Handle; 111 - Mounting hole; 12 - Main shaft; 121 - Mounting groove; 13 - First mounting seat; 14 - One-way rotation assembly; 141 - Bearing; 142 - Ratchet member; 1421 - Ratchet; 1422 - Shaft portion; 143 - Spacer; 144 - Pawl seat; 145 - First pawl; 146 - First elastic member; 147 - Second pawl; 148 - Second elastic member; 15 - Gear assembly; 16 - Hinge member; 17 - Second mounting seat; 18 - Transmission shaft; 19 - Belt pulling assembly; 2 - Welding mechanism. Detailed implementation manners

[0025] Please refer to Figures 1 to 7 . The following uses specific specific examples to illustrate the implementation manners of the present utility model, and those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

[0026] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limiting conditions under which the present utility model can be implemented. Therefore, they do not have technical essential significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present utility model. At the same time, the terms such as "left", "right", "up", "down" and "one" cited in this specification are only for the convenience of clear description, and are not used to limit the scope under which the present utility model can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope within which the present utility model can be implemented.

[0027] In the present utility model, for clear description, the following is stated: The observer faces the attached Figure 1For observation, one end close to the gear assembly is set as the "front end", and the other end in the opposite direction is set as the "rear end". The above description is only for the convenience of clearly describing the present invention, rather than indicating or implying that the indicated structure or components must have a specific orientation or be constructed in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0028] As Figure 1 shown, a tensioning mechanism 1 of a strapping machine is installed and used in the strapping machine for tightening the strapping belt. The strapping machine further includes a welding mechanism 2 for cutting and welding the strapping belt.

[0029] Please refer to Figure 1 , Figure 2 and Figure 3 , the tensioning mechanism 1 includes a handle 11, a main shaft 12, a first mounting seat 13, a one-way rotation assembly 14, a gear assembly 15, a hinge 16, a second mounting seat 17, a transmission shaft 18 and a belt pulling assembly 19. The handle 11 is fixedly connected to the main shaft 12, and the handle 11 drives the main shaft 12 to rotate. The main shaft 12 is movably installed on the first mounting seat 13. The one-way rotation assembly 14 is connected to the front end of the main shaft 12, and the one-way rotation assembly 14 is used to achieve the one-way rotation of the tensioning mechanism 1. The gear assembly 15 is connected to the one-way rotation assembly 14, and the gear assembly 15 includes an output gear and a planetary gear set for outputting the torque and speed change of the main shaft 12. The front end of the hinge 16 is placed into the first mounting seat 13, and the rear end passes through the second mounting seat 17. The front end of the transmission shaft 18 is connected to the gear assembly 15, and the rear end passes through the second mounting seat 17 and is connected to the belt pulling assembly 19. The rear end of the hinge 16 is connected to the belt pulling assembly 19, and the belt pulling assembly 19 is driven by the transmission shaft 18 to work.

[0030] As Figure 5 shown, the handle 11 is provided with a mounting hole 111, and the main shaft 12 is placed into the mounting hole 111.

[0031] The rear end of the main shaft 12 passes through the handle 11 and is connected to the one-way rotation assembly 14. The front end of the main shaft 12 is provided with a mounting groove 121, and the front end of the main shaft 12 is connected to the one-way rotation assembly 14 through the mounting groove 121.

[0032] Specifically, the part of the main shaft 12 connected to the handle 11 and the front end cross-section of the main shaft 12 can be a rounded square, and the mounting hole 111 can be a square hole, so that the main shaft 12 and the handle 11 rotate synchronously. When the handle 11 is pressed down, it drives the main shaft 12 to rotate in the first rotation direction, and when the handle 11 is lifted, it drives the main shaft 12 to rotate in the second rotation direction.

[0033] Please refer to Figure 4 and Figure 5 The one-way rotating assembly 14 includes a bearing 141, a ratchet member 142, a gasket 143, a pawl seat 144, a first pawl 145, a first elastic member 146, a second pawl 147 and a second elastic member 148. The bearing 141 is installed in the installation groove 121. The bearing 141 is sleeved on the rear end of the ratchet member 142 and is installed in the installation groove 121 through the bearing 141. The front end of the ratchet member 142 is connected to the gear assembly 15. The gasket 143 is sleeved on the rear end of the ratchet member 142 and is located between the bearing 141 and the ratchet member 142. The pawl seat 144 is sleeved on the front end of the main shaft 12, and the pawl seat 144 rotates synchronously with the main shaft 12. The first pawl 145 is installed in the pawl seat 144. When rotating in the first rotation direction, the first pawl 145 meshes with the ratchet member 142, and the pawl seat 144 drives the ratchet member 142 to rotate through the first pawl 145. When rotating in the second rotation direction, the first pawl 145 is movably meshed with the ratchet member 142, and the first pawl 145 continuously exits the original tooth and enters the next tooth. The first elastic member 146 is placed in the pawl seat 144 and abuts against the first pawl 145. When the pawl seat 144 and the main shaft 12 rotate in the second rotation direction, the first pawl 145 compresses the first elastic member 146 until the first pawl 145 enters the next tooth, and the first elastic member 146 is restored. The second pawl 147 is rotatably installed on the first mounting seat 13. In the first rotation direction, the second pawl 147 is movably meshed with the ratchet member 142. In the second rotation direction, the second pawl 147 abuts against the ratchet member 142 to prevent the ratchet member 142 from rotating. One end of the second elastic member 148 is connected to the second pawl 147, and the other end is fixed on the first mounting seat 13. When rotating in the first rotation direction, the second pawl 147 continuously exits, compresses the second elastic member 148, and the second pawl 147 enters the next tooth, and the second elastic member 146 is restored.

[0034] Please refer to Figure 6 and Figure 7, the ratchet member 142 includes a ratchet wheel 1421 and a shaft portion 1422. The ratchet wheel 1421 is sleeved on the shaft portion 1422. The ratchet wheel 1421 and the shaft portion 1422 can be integrally formed components or separately assembled components, but the ratchet wheel 1421 and the shaft portion 1422 rotate synchronously. The rear end of the shaft portion 1422 is sleeved with the bearing 141, and together with the bearing 141, it is placed into the mounting groove 121. The gasket 143 is located between the ratchet wheel 1421 and the bearing 141. The front end of the shaft portion 1422 is connected to the gear assembly 15.

[0035] Specifically, the bearing 141 and the gasket 143 are non-essential technical features. The bearing 141 and the gasket 143 are optional components in the preferred embodiment. The rear end of the shaft portion 1422 can be directly installed in the mounting groove 121.

[0036] When packing, the first mounting seat 13 presses down, thereby driving the strap assembly 19 to compress the packing strap. The handle 11 is rotated repeatedly to tighten the packing strap. When the handle 11 is pressed down, the main shaft 12 rotates in the first rotation direction. The pawl seat 144 rotates synchronously with the main shaft 12. The first pawl 145 meshes with the ratchet wheel 1421, abuts against the ratchet wheel 1421 and drives the ratchet wheel 1421 to rotate. The second pawl 147 meshes with the ratchet wheel 1421 movably. The second pawl 147 continuously exits the original tooth, compresses the second elastic member 148, and after entering the next tooth, the second elastic member 148 resumes its original state. When the handle 11 is lifted, the main shaft 12 rotates in the second rotation direction. The pawl seat 144 rotates synchronously with the main shaft 12. The first pawl 145 meshes with the ratchet wheel 1421 movably. The first pawl 145 continuously exits the original tooth, compresses the first elastic member 146, and after entering the next tooth, the first elastic member 146 resumes its original state. The second pawl 147 meshes with the ratchet wheel 1421 and abuts against the ratchet wheel 1421 to keep the ratchet wheel 1421 from rotating. Under the action of the one-way rotation assembly 14, the torque of the one-way rotation of the main shaft 12 is transmitted to the strap assembly 19 through the gear assembly 15 and the transmission shaft 18, so that the strap assembly 19 tightens the packing strap, and then the two layers of packing straps are welded together and cut by the welding mechanism 2 to realize the packing of the article.

[0037] In summary, the present utility model changes the position and structural layout of the ratchet wheel, encloses the ratchet wheel and the planetary gear set inside the bundling machine, effectively preventing dirt from falling into the gears and causing the risk of jamming. At the same time, in the first rotation direction, the first pawl drives the ratchet wheel member to rotate, and in the second rotation direction, the second pawl abuts against the ratchet wheel member to prevent the ratchet wheel member from rotating, enabling the ratchet wheel member to achieve one-way rotation. When the handle rotates in the second rotation direction after the packing belt is tightened, it will not drive the ratchet wheel to rotate, so that the belt pulling assembly can only tighten the packing belt in one direction, effectively preventing the packing belt from being damaged due to too fast tightening speed, and the overall use is convenient and the performance is stable.

[0038] Therefore, the present utility model effectively overcomes various shortcomings in the prior art and has high industrial utilization value. The above embodiments are only illustrative of the principles and effects of the present utility model, and are not used to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A tensioning mechanism for a packing machine, comprising a handle, a first mounting seat, a main shaft and a unidirectional rotation assembly. The handle is fixedly connected to the main shaft, and the handle drives the main shaft to rotate. The main shaft is movably mounted on the first mounting seat, and the front end of the main shaft penetrates into the unidirectional rotation assembly. It is characterized in that, The one-way rotation assembly includes: A ratchet member, which is connected to the front end of the main shaft. The ratchet member includes a ratchet wheel and a shaft portion. The ratchet wheel is sleeved on the shaft portion, and the ratchet wheel rotates synchronously with the shaft portion. The rear end of the shaft portion is placed inside the front end of the main shaft.

2. The tensioning mechanism of a packing machine according to claim 1, characterized in that, The one-way rotation assembly further includes a pawl seat, a first pawl, and a first elastic member. The pawl seat is sleeved on the front end of the main shaft and rotates synchronously with the main shaft. The first elastic member is placed inside the pawl seat. The first pawl is installed in the pawl seat, and the first elastic member abuts against the first pawl.

3. The tensioning mechanism of a packing machine according to claim 2, characterized in that, The pawl seat, the first pawl rotate synchronously with the main shaft. The first pawl abuts against and drives the ratchet wheel to rotate synchronously in the first rotation direction, and is movably engaged with the ratchet wheel in the second rotation direction.

4. The tensioning mechanism of a strapping machine according to claim 1, characterized in that, The one-way rotation assembly further includes a second pawl and a second elastic member. The second pawl is movably installed on the first mounting seat. The second elastic member is fixed on the first mounting seat, and the other end is connected to the second pawl.

5. The tensioning mechanism of a packing machine according to claim 4, characterized in that, The second pawl is movably engaged with the ratchet wheel in the first rotation direction, and the second pawl abuts against the ratchet wheel in the second rotation direction.

6. The tensioning mechanism of a packing machine according to claim 1, characterized in that, The one-way rotation assembly further includes a bearing. The bearing is sleeved on the rear end of the shaft portion and is placed inside the front end of the main shaft together with the rear end of the shaft portion.

7. The tensioning mechanism of a strapping machine according to claim 1, characterized in that, The one-way rotation assembly further includes a gasket. The gasket is sleeved on the rear end of the shaft portion and is located between the ratchet wheel and the main shaft.

8. The tensioning mechanism of a packing machine according to claim 1, characterized in that, The handle is provided with a mounting hole. The main shaft passes through the mounting hole, and the handle is movably installed on the first mounting seat.

9. The tensioning mechanism of a strapping machine according to claim 1, characterized in that, The front end of the main shaft is provided with a mounting groove, and the rear end of the shaft portion is installed in the mounting groove.

10. The tensioning mechanism of a strapping machine according to claim 1, wherein, It further includes a gear assembly, a transmission shaft, and a pulling belt assembly. The gear assembly is connected to the ratchet member. One end of the transmission shaft is connected to the gear assembly, and the other end is connected to the pulling belt assembly.

11. The tensioning mechanism of a packing machine according to claim 10, characterized in that, It further includes a hinge member and a second mounting seat. The front end of the hinge member is placed inside the first mounting seat, and the rear end passes through the second mounting seat and is connected to the pulling belt assembly.

12. Packaging machine, characterized in that, It includes a tensioning mechanism of a strapping machine according to any one of claims 1-11 above.

Images