Rubber band expander

Abstract

The utility model relates to the technical field of rubber bands, in particular to a rubber band expander. Comprising a first swing arm, a second swing arm and rubber band supporting rods, the first swing arm and the second swing arm are arranged on a rack, the rubber band supporting rods are arranged at the end of the first swing arm and the end of the second swing arm respectively, and the first swing arm and the second swing arm are rotationally connected with the rack; a transmission rod is connected between the first swing arm and the second swing arm; one side of the first swing arm is further connected with a driving assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of rubber bands, in particular to a rubber band expander. Background Art

[0002] In the field of rubber band processing and use, the rubber band needs to be stretched for subsequent use. When setting the rubber band stretching structure, the transmission drive method expands the rubber band to the required size by telescopic sliding at right angles in two directions. The telescopic distance of the drive mechanism is equal to the stretching distance of the rubber band, so that the drive mechanism needs to be large enough, and thus sufficient space needs to be reserved for the rubber band expansion mechanism in the equipment, resulting in a waste of cost and space. In addition, during the long-term use of the full-length drive mechanism, its failure rate is relatively high due to its large telescopic distance, which affects its normal use. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a rubber band expander in response to the above-mentioned technical deficiencies. The utility model adopts a first swing arm and a second swing arm rotatably arranged on a frame, so that the first swing arm and the second swing arm are driven to rotate by a driving mechanism, thereby realizing the expansion of the rubber band, reducing the travel distance of the driving mechanism, thereby reducing the layout size of the overall equipment, and also reducing the failure rate of the overall equipment. Furthermore, by adopting an inclined power arm and a transmission arm on the first swing arm, a smaller telescopic distance of the driving mechanism is further realized to drive a larger swing amplitude of the swing arm.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: it includes a rubber band strut, which is respectively arranged at the end of the first swing arm and the second swing arm, and the first swing arm and the second swing arm are rotatably connected to the frame; a transmission rod is connected between the first swing arm and the second swing arm; and a driving component is also connected to one side of the first swing arm.

[0005] To further optimize the technical solution, the first swing arm is provided with a swing arm for connecting to a rubber band strut extending outward along the rotation position of the frame, a rubber band strut is provided at the end of the swing arm, and the first swing arm is extended along the other side to provide a power arm for connecting to a driving assembly; the first swing arm is also provided with a transmission arm for connecting to a transmission rod extending to one side along the rotation position of the frame.

[0006] To further optimize the technical solution, the swing arm and the power arm are respectively arranged on both sides of the rotation connection position of the first swing arm and the frame; the power arm and the transmission arm are arranged on the same side of the rotation connection position of the first swing arm and the frame.

[0007] To further optimize the technical solution, the second swing arm extends to both sides along the rotation connection position with the frame and is respectively provided with a swing arm for connecting to the rubber band strut and a transmission arm for connecting to the transmission rod.

[0008] To further optimize the technical solution, the power arm is tilted toward a direction away from the driving assembly, and the transmission arm on the first swing arm is tilted toward a direction away from the second swing arm.

[0009] To further optimize the technical solution, the angle between the power arm and the swing arm is 90°-120°.

[0010] To further optimize the technical solution, both ends of the driving assembly are rotatably connected to the frame and the end of the power arm respectively.

[0011] To further optimize the technical solution, the driving component is a telescopic air cylinder or a telescopic oil cylinder.

[0012] To further optimize the technical solution, two groups of rubber band struts, a first swing arm and a second swing arm are relatively arranged on the frame to achieve the separation or proximity of the rubber band struts on the two sides.

[0013] Compared with the prior art, the utility model has the following advantages: 1. The first swing arm and the second swing arm are rotatably arranged on the frame. This structure advantageously ensures that the first swing arm and the second swing arm as a whole are driven to rotate by the driving mechanism, thereby realizing the expansion of the rubber band, reducing the travel distance of the driving mechanism, thereby reducing the layout size of the overall equipment, and also reducing the failure rate of the overall equipment; 2. By adopting the inclined power arm and transmission arm on the first swing arm, this structure advantageously ensures that the driving mechanism has a smaller telescopic distance, which is used to drive the swing arm to have a larger swing amplitude. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of a rubber band expander in a first embodiment of the rubber band expander in a gathered state.

[0015] Figure 2 This is a schematic diagram of a rubber band expander in a first embodiment of the rubber band expander in an open state.

[0016] Figure 3 This is a schematic diagram of a rubber band expander in a second embodiment of the rubber band expander in a gathered state.

[0017] In the figure: 1. rubber band support rod; 2. first swing arm; 3. second swing arm; 4. frame; 5. transmission rod; 6. driving assembly; 7. swing arm; 8. power arm; 9. transmission arm. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model. Example

[0019] Combination Figure 1-2 As shown, it includes a rubber band strut 1, and the rubber band strut 1 is respectively arranged at the end of the first swing arm 2 and the second swing arm 3, and the first swing arm 2 and the second swing arm 3 are rotatably connected to the frame 4; a transmission rod 5 is connected between the first swing arm 2 and the second swing arm 3; and a driving component 6 is also connected to one side of the first swing arm 2. Two groups of rubber band struts 1, the first swing arm 2 and the second swing arm 3 are relatively arranged on the frame 4; used to achieve the distance or approach of the rubber band struts 1 on the opposite sides, in the two groups of rubber band struts 1, the first swing arm 2 and the second swing arm 3, the two groups of rubber band struts 1 are closely arranged, and the two groups of first swing arms 2 and second swing arms 3 are arranged on the same side of the frame 4. In the solution of using two groups of swing arm mechanisms on one side, the overall equipment space is saved and improved.

[0020] The first swing arm 2 is provided with a swing arm 7 for connecting the rubber band strut 1 extending outward from the rotation position with the frame 4, and the rubber band strut 1 is provided at the end of the swing arm 7. The first swing arm 2 is provided with a power arm 8 for connecting the drive assembly 6 extending from the other side; the first swing arm 2 is also provided with a transmission arm 9 for connecting the transmission rod 5 extending from the rotation position with the frame 4 to one side. The swing arm 7 and the power arm 8 are respectively arranged on both sides of the rotation connection position of the first swing arm 2 and the frame 4; the power arm 8 and the transmission arm 9 are arranged on the same side of the rotation connection position of the first swing arm 2 and the frame 4. The second swing arm 3 is respectively provided with a swing arm 7 for connecting the rubber band strut 1 and a transmission arm 9 for connecting the transmission rod 5 extending from the rotation connection position with the frame 4 to both sides. The power arm 8 is arranged in an inclined manner away from the drive assembly 6, and the transmission arm 9 on the first swing arm 2 is arranged in an inclined manner away from the second swing arm 3. The angle between the power arm 8 and the swing arm 7 is 90°-120°. The two ends of the driving assembly 6 are respectively rotatably connected with the frame 4 and the end of the power arm 8. The driving assembly 6 is a telescopic cylinder.

[0021] When using, combine Figure 1-2As shown, when the gathered state is opened, the driving assembly 6 is in an extended state, and the driving assembly 6 contracts, thereby pulling the first swing arm 2 to rotate. While the first swing arm 2 rotates, the transmission rod 5 pushes the second swing arm 3 to rotate in the opposite direction, and the rubber band strut 1 at the end of the swing arm 7 of the first swing arm 2 and the rubber band strut 1 of the swing arm 7 of the second swing arm 3 move away from each other, and the two groups of first swing arms 2 and second swing arms 3 on both sides move simultaneously, so that the four rubber band struts 1 stretch the rubber band.

[0022] At the same time, the swing arm 7 and the power arm 8 are respectively arranged on both sides of the rotation connection position of the first swing arm 2 and the frame 4; the power arm 8 and the transmission arm 9 are arranged on the same side of the rotation connection position of the first swing arm 2 and the frame 4, and the power arm 8 is inclined away from the driving assembly 6. A further lever effect is formed, which shortens the telescopic stroke of the driving assembly 6 while ensuring that the rubber band support rod 1 can be fully opened. Example

[0023] Combination Figure 3 As shown, it includes a rubber band strut 1, which is respectively arranged at the ends of the first swing arm 2 and the second swing arm 3, and the first swing arm 2 and the second swing arm 3 are rotatably connected to the frame 4; a transmission rod 5 is connected between the first swing arm 2 and the second swing arm 3; and a driving component 6 is also connected to one side of the first swing arm 2. Two groups of rubber band struts 1, the first swing arm 2 and the second swing arm 3 are relatively arranged on the frame 4; used to achieve the distance or approach of the rubber band struts 1 on the opposite sides, in the two groups of rubber band struts 1, the first swing arm 2 and the second swing arm 3, the two groups of rubber band struts 1 are closely arranged, the two groups of first swing arms 2 and the second swing arms 3 are arranged on both sides of the frame 4, and the rubber band struts 1 on both sides are arranged towards the middle.

[0024] The first swing arm 2 is provided with a swing arm 7 for connecting the rubber band strut 1 extending outward from the rotation position with the frame 4, and the rubber band strut 1 is provided at the end of the swing arm 7. The first swing arm 2 is provided with a power arm 8 for connecting the drive assembly 6 extending from the other side; the first swing arm 2 is also provided with a transmission arm 9 for connecting the transmission rod 5 extending from the rotation position with the frame 4 to one side. The swing arm 7 and the power arm 8 are respectively arranged on both sides of the rotation connection position of the first swing arm 2 and the frame 4; the power arm 8 and the transmission arm 9 are arranged on the same side of the rotation connection position of the first swing arm 2 and the frame 4. The second swing arm 3 is respectively provided with a swing arm 7 for connecting the rubber band strut 1 and a transmission arm 9 for connecting the transmission rod 5 extending from the rotation connection position with the frame 4 to both sides. The power arm 8 is arranged in an inclined manner away from the drive assembly 6, and the transmission arm 9 on the first swing arm 2 is arranged in an inclined manner away from the second swing arm 3. The angle between the power arm 8 and the swing arm 7 is 90°-120°. The two ends of the driving assembly 6 are respectively rotatably connected to the frame 4 and the end of the power arm 8. The driving assembly 6 is a telescopic oil cylinder.

[0025] When using, combine Figure 3 As shown, when the gathered state is opened, the driving assembly 6 is in an extended state, and the driving assembly 6 contracts, thereby pulling the first swing arm 2 to rotate. While the first swing arm 2 rotates, the transmission rod 5 pushes the second swing arm 3 to rotate in the opposite direction, and the rubber band strut 1 at the end of the swing arm 7 of the first swing arm 2 and the rubber band strut 1 of the swing arm 7 of the second swing arm 3 move away from each other, and the two groups of first swing arms 2 and second swing arms 3 on both sides move simultaneously, so that the four rubber band struts 1 stretch the rubber band.

[0026] At the same time, the swing arm 7 and the power arm 8 are respectively arranged on both sides of the rotation connection position of the first swing arm 2 and the frame 4; the power arm 8 and the transmission arm 9 are arranged on the same side of the rotation connection position of the first swing arm 2 and the frame 4, and the power arm 8 is inclined away from the driving assembly 6. A further lever effect is formed, which shortens the telescopic stroke of the driving assembly 6 while ensuring that the rubber band support rod 1 can be fully opened.

[0027] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field, which belongs to the common knowledge in this field. In addition, the present invention is mainly used to protect mechanical settings, so the present invention will no longer explain the control method and circuit connection in detail.

[0028] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.

Claims

1. A rubber band expander, characterized in that: It includes a rubber band strut, which is respectively arranged at the end of the first swing arm and the second swing arm, and the first swing arm and the second swing arm are rotatably connected to the frame; a transmission rod is connected between the first swing arm and the second swing arm; a driving assembly is also connected to one side of the first swing arm; the first swing arm is provided with a swing arm for connecting the rubber band strut extending outward from the rotation position of the frame, and a rubber band strut is provided at the end of the swing arm, and the first swing arm is extended along the other side to provide a power arm for connecting the driving assembly; the first swing arm is also provided with a transmission arm for connecting the transmission rod extending to one side from the rotation position of the frame.

2. A rubber band expander according to claim 1, characterized in that: The swing arm and the power arm are respectively arranged on both sides of the rotation connection position of the first swing arm and the frame; the power arm and the transmission arm are arranged on the same side of the rotation connection position of the first swing arm and the frame.

3. A rubber band expander according to claim 2, characterized in that: The second swing arm extends to both sides along the rotation connection position with the frame and is respectively provided with a swing arm for connecting with the rubber band support rod and a transmission arm for connecting with the transmission rod.

4. A rubber band expander according to claim 3, characterized in that: The power arm is tilted toward a direction away from the driving component, and the transmission arm on the first swing arm is tilted toward a direction away from the second swing arm.

5. A rubber band expander according to claim 4, characterized in that: The angle between the power arm and the swing arm is 90°-120°.

6. A rubber band expander according to claim 3, characterized in that: The two ends of the driving assembly are rotatably connected to the frame and the end of the power arm respectively.

7. A rubber band expander according to claim 6, characterized in that: The driving component is a telescopic air cylinder or a telescopic oil cylinder.

8. A rubber band expander according to claim 1, characterized in that: Two groups of rubber band struts, a first swing arm and a second swing arm are arranged on the frame relatively to each other, and are used to realize the separation or approach of the rubber band struts on the two sides relatively.

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