Rubber band expanding mechanism

Abstract

The utility model relates to the technical field of rubber band processing, in particular to a rubber band expanding mechanism. Comprising a rack, a first swing arm and a second swing arm, the first swing arm is arranged on the outer side of the second swing arm; a transmission arm is further rotationally connected between the first swing arm and the second swing arm. A rubber band supporting rod is arranged at one end of each of the first swing arm and the second swing arm; one side of the second swing arm is further connected with a pushing assembly through a connecting rod.

Description

Technical Field

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

[0002] When the rubber band is in use, it needs to be expanded. In the field of rubber band expansion, it is common to use a two-way double-cylinder assembly to expand the rubber band into a square shape and then put it on the outside. However, when the two-way cylinder is used for a long time, due to the long telescopic distance of its telescopic structure, the cylinder has a high failure rate after long-term use and is easy to be damaged. At the same time, when the double-cylinder assembly is set up, it has a large space requirement and requires sufficient space for arrangement. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide a rubber band expansion mechanism in response to the above-mentioned technical deficiencies. A pushing assembly is used to push the first swing arm and the second swing arm to rotate along the frame, thereby reducing the overall travel distance of the pushing assembly while achieving the expansion action of the rubber band. At the same time, it also avoids the problem that when multiple cylinders are in action, different actions are easily caused, thereby affecting the service life.

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

[0005] To further optimize the technical solution, the transmission arm is arranged on one side where the first swing arm and the second swing arm are rotatably connected to the frame; the rubber band support rod is arranged on the other side where the first swing arm and the second swing arm are rotatably connected to the frame.

[0006] To further optimize the technical solution, the rotational connection position between the connecting rod and the second swing arm is located on the same side as the rotational connection between the second swing arm and the frame.

[0007] To further optimize the technical solution, the pushing assembly includes a single-rod cylinder arranged on a frame and a pushing block arranged at the telescopic end of the cylinder, the pushing block is slidably connected to the frame via a slide rail, and the pushing block is also rotatably connected to the connecting rod.

[0008] To further optimize the technical solution, the pushing assembly includes a double-rod cylinder arranged on a frame and a pushing block arranged at the telescopic end of the cylinder, and the pushing block is also rotatably connected to the connecting rod.

[0009] Compared with the prior art, the utility model has the following advantages: a pushing assembly is used to push the first swing arm and the second swing arm to rotate along the frame. This structure advantageously ensures that the overall travel distance of the pushing assembly is reduced while realizing the expansion action of the rubber band. At the same time, it also avoids the problem that when multiple cylinders are in motion, different actions may occur, thereby affecting the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The present invention is a schematic diagram of the state of a rubber band expansion mechanism when the rubber band support rods are gathered.

[0011] Figure 2 The present invention is a schematic diagram of the state of a rubber band expansion mechanism during the process of rubber band support rod opening.

[0012] Figure 3 The present invention is a schematic diagram of the opening and loading of a rubber band strut of a rubber band expansion mechanism.

[0013] In the figure: 1. frame; 2. first swing arm; 3. second swing arm; 4. transmission arm; 5. rubber band support rod; 6. pushing assembly; 7. connecting rod; 8. single-rod cylinder; 9. pushing block; 10. slide rail. DETAILED DESCRIPTION

[0014] 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.

[0015] Embodiment 1, combined with Figure 1-3 As shown, it includes a frame 1, and a first swing arm 2 and a second swing arm 3 symmetrically arranged and rotatably connected on the frame 1; the first swing arm 2 is arranged outside the second swing arm 3; a transmission arm 4 is also rotatably connected between the first swing arm 2 and the second swing arm 3; the first swing arm 2 and the second swing arm 3 are respectively provided with a rubber band strut 5 at one end; and a push assembly 6 is also connected to one side of the second swing arm 3 through a connecting rod 7. The first swing arms 2 are arranged on both sides of the frame 1, and two second swing arms 3 are arranged between the two first swing arms 2, so that when the push assembly 6 is pushed, the first swing arm 2 is pulled by the transmission arm 4 to rotate in the opposite direction while the second swing arm 3 rotates with the frame 1, so that the rubber band strut 5 at the end is gathered and contracted.

[0016] The transmission arm 4 is arranged on one side where the first swing arm 2 and the second swing arm 3 are rotatably connected to the frame 1; the rubber band support rod 5 is arranged on the other side where the first swing arm 2 and the second swing arm 3 are rotatably connected to the frame 1. When the second swing arm 3 is pushed, the first swing arm 2 forms a lever with the rotation position of the frame 1 through the correspondence between the rotation connection position of the first swing arm 2 and the second swing arm 3 and the frame 1 and the rotation position of the transmission arm 4, and the small swing distance of the transmission arm 4 is transmitted to the first swing arm 2, so that the first swing arm 2 can achieve a sufficient swing distance.

[0017] The rotational connection position between the connecting rod 7 and the second swing arm 3 is located on the same side as the rotational connection between the second swing arm 3 and the frame 1 .

[0018] The pushing assembly 6 includes a single-rod cylinder 8 arranged on the frame 1 and a pushing block 9 arranged at the telescopic end of the cylinder. The pushing block 9 is slidably connected to the frame 1 through a slide rail 10, and the pushing block 9 is also rotatably connected to the connecting rod 7.

[0019] The difference between the second embodiment and the first embodiment is that the single-rod cylinder is replaced with a double-rod cylinder. Since the double-rod cylinder has its own stable directional push, there is no need to connect the push block 9 and the frame through the slide rail 10.

[0020] When using, combine Figure 1-3 As shown, when the gathered state is opened, the pushing assembly 6 is in an extended state, the rubber band struts 5 at the ends of the first swing arm 2 and the second swing arm 3 are close to each other, the pushing assembly 6 contracts, and then the second swing arm 3 is pulled to rotate to both sides through the connecting rod 7, first driving the rubber band struts 5 at the ends of the second swing arms 3 on both sides to move away, and at the same time, the swing is transmitted to the first swing arm 2 through the transmission arm 4. The first swing arm 2 is pulled by the transmission arm 4, and the first swing arm 2 rotates to both sides relative to the frame 1, so that the rubber band struts 5 at the ends of the first swing arms 2 on both sides are moved away, and the action of stretching the rubber band is realized.

[0021] When the expanded state is restored to the gathered state, at this time, the pushing component 6 is in the contracted state, and the second swing arm 3 is pushed to rotate toward the middle relative to the frame 1 by the movement of the pushing component 6, and the rubber band struts 5 at the ends of the two second swing arms 3 are close to each other and restored to the gathered state. At the same time, the second swing arm 3 pushes the transmission arm 4, thereby pushing the first swing arm 2 to rotate relative to the frame 1, thereby realizing the rubber band struts 5 at the ends of the two first swing arms 2 to approach each other and gather. The pushing component 6 is a single-rod cylinder 8 or a double-rod cylinder.

[0022] 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.

[0023] 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 expansion mechanism, characterized in that: It includes a frame, and a first swing arm and a second swing arm symmetrically arranged on the frame and rotatably connected; the first swing arm is arranged on the outside of the second swing arm; a transmission arm is also rotatably connected between the first swing arm and the second swing arm; the first swing arm and the second swing arm are respectively provided with a rubber band support rod at one end; one side of the second swing arm is also connected to a pushing component through a connecting rod.

2. A rubber band expansion mechanism according to claim 1, characterized in that: The transmission arm is arranged on one side where the first swing arm and the second swing arm are rotatably connected to the frame; the rubber band support rod is arranged on the other side where the first swing arm and the second swing arm are rotatably connected to the frame.

3. A rubber band expansion mechanism according to claim 2, characterized in that: The rotational connection position between the connecting rod and the second swing arm is located on the same side as the rotational connection between the second swing arm and the frame.

4. A rubber band expansion mechanism according to any one of claims 1 to 3, characterized in that: The pushing assembly comprises a single-rod cylinder arranged on a frame and a pushing block arranged at the telescopic end of the cylinder. The pushing block is slidably connected to the frame via a slide rail, and the pushing block is also rotatably connected to a connecting rod.

5. A rubber band expansion mechanism according to any one of claims 1 to 3, characterized in that: The pushing assembly comprises a double-rod cylinder arranged on a frame and a pushing block arranged at the telescopic end of the cylinder, and the pushing block is also rotatably connected with the connecting rod.

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