Lightweight tension rod assembly

Abstract

The utility model provides a lightweight tension rod assembly. The lightweight tension rod assembly comprises a hollow inner rod, a hollow outer rod, an inner bearing, an outer bearing and a transmission gear, the hollow inner rod is sleeved with the hollow outer rod, the two ends of the hollow inner rod are installed in inner holes in the two ends of the hollow outer rod through bearings, and the hollow outer rod and the hollow inner rod are rotationally matched with each other; the outermost end of the hollow inner rod is arranged to exceed the end portion of the hollow outer rod, and the outermost end of the hollow inner rod is provided with an outer bearing and a transmission gear. The lightweight tension rod assembly has the advantage of light weight.

Description

Technical Field

[0001] The utility model relates to the technical field of printers, and specifically, to a lightweight tension rod assembly. Background Art

[0002] The tension rod is a functional component in the printer roller system. Its main function is to tension the printing medium. It is difficult to match the speeds of the printing medium on the feeding and receiving sides with the speed during the printing process. Moreover, the printing medium is often a flexible material. Therefore, a tension rod is needed to maintain the tension of the printing medium.

[0003] Among the tension rods, there is a type of tension rod that mainly applies its own gravity to the surface of the printing medium and relies on its own weight to maintain the tension of the printing medium.

[0004] With the development of technology, the increasing demand for printing products by people, and the cost control of printing manufacturers and other factors, the types of printing media are also increasing. Among them, there are significant differences in the thickness of the printing media in different categories. Thicker printing media can be pressed by tension rods with greater self-weight, but thinner printing media can hardly bear the self-weight of the tension rod and are prone to deformation.

[0005] Due to these differences, especially the printing requirements of thinner printing media, it is necessary to transform the tension rod so that its self-weight can reach a lighter level. When the weight needs to be increased, the self-weight can be changed by adding counterweights, but a basic and lighter tension rod structure is required as a foundation.

[0006] In order to solve the above problems, people have been seeking an ideal technical solution. Content of the Utility Model

[0007] The purpose of the utility model is to overcome the deficiencies of the prior art, and thus provide a lightweight tension rod assembly with a lighter self-weight.

[0008] To achieve the above purpose, the technical solution adopted by the utility model is: a lightweight tension rod assembly, including a hollow inner rod, a hollow outer rod, an inner bearing, an outer bearing, and a transmission gear;

[0009] The hollow outer rod is sleeved outside the hollow inner rod. Both ends of the hollow inner rod are installed in the inner holes at both ends of the hollow outer rod through inner bearings, and the hollow outer rod and the hollow inner rod are rotatably matched with each other;

[0010] The outermost end of the hollow inner rod extends beyond the end of the hollow outer rod, and an outer bearing and a transmission gear are installed at the outermost end of the hollow inner rod.

[0011] As described above, the inner holes at both ends of the hollow outer rod are stepped holes, the inner bearing is installed in the stepped hole, and the hollow inner rod passes through the stepped hole.

[0012] As described above, the hollow inner rod is a metal rod or a plastic rod.

[0013] As described above, the hollow outer rod is a metal rod or a plastic rod.

[0014] As described above, the transmission gear is installed on the hollow inner rod between the inner bearing and the outer bearing, and the transmission gear is fixedly connected to the hollow inner rod.

[0015] As described above, a gear retaining ring is installed at one end of the transmission gear close to the hollow outer rod.

[0016] As described above, an inner bearing retaining ring is arranged on the hollow inner rod outside the inner bearing.

[0017] As described above, an outer bearing retaining ring is arranged on the hollow inner rod outside the outer bearing.

[0018] As described above, an annular boss is arranged on one side of the transmission gear close to the outer bearing.

[0019] The present utility model has substantial features and progress compared with the prior art. Specifically, by designing the tension rod in the form of an inner rod and an outer rod, and setting both the inner rod and the outer rod as hollow rods, and optimizing the function of the tension rod through the cooperation of the inner bearing and the outer bearing, the self-weight of the tension rod is finally reduced, the lower limit of the tension constraint is lower, and it can adapt to thinner printing media. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the lightweight tension rod assembly in the present utility model.

[0021] Figure 2 is a partial view of the lightweight tension rod assembly in the present utility model.

[0022] Figure 3 is a detailed view of the end of the lightweight tension rod assembly in the present utility model.

[0023] Figure 4 is a perspective view of the end of the lightweight tension rod assembly in the present utility model.

[0024] Figure 5 is a cross-sectional view of the end of the lightweight tension rod assembly in the present utility model.

[0025] In the figure: 1. Hollow inner rod; 2. Hollow outer rod; 3. Inner bearing; 4. Outer bearing; 5. Transmission gear; 6. Gear retaining ring; 7. Inner bearing retaining ring; 8. Outer bearing retaining ring. Detailed implementation manners

[0026] The technical solution of the present utility model will be further described in detail below through specific implementation manners.

[0027] As Figures 1 - 5 shown, a lightweight tension rod assembly includes a hollow inner rod 1, a hollow outer rod 2, an inner bearing 3, an outer bearing 4, and a transmission gear 5.

[0028] The hollow outer rod 2 is sleeved outside the hollow inner rod 1. Both ends of the hollow inner rod 1 are installed in the inner holes at both ends of the hollow outer rod 2 through the inner bearings 3. The hollow outer rod 2 and the hollow inner rod 1 are rotatably matched with each other;

[0029] The outermost end of the hollow inner rod 1 extends beyond the end of the hollow outer rod 2. The outermost end of the hollow inner rod 1 is installed with the outer bearing 4 and the transmission gear 5.

[0030] Specifically, in this embodiment, the inner holes at both ends of the hollow outer rod 2 are provided as stepped holes. The inner bearings 3 are installed in the stepped holes. The hollow inner rod 1 passes through the stepped holes and is coaxial with the hollow outer rod 2.

[0031] In terms of material, the hollow inner rod is a metal rod or a plastic rod, and the hollow outer rod is a metal rod or a plastic rod. Generally, the metal rod is easier to be selected as the preferred solution because of simpler process, appropriate weight, and wear resistance. However, the plastic rod is the preferred solution in the scenarios with its performance advantages.

[0032] The transmission gear 5 is installed on the hollow inner rod 1 between the inner bearing 3 and the outer bearing 4. The transmission gear 5 is fixedly connected to the hollow inner rod 1. A gear retaining ring 6 is installed at one end of the transmission gear 5 close to the hollow outer rod 2 to restrict the axial movement of the transmission gear 5. A circular boss is provided on one side of the transmission gear 5 close to the outer bearing 4 as the reference support surface on the inner side of the outer bearing 4.

[0033] An inner bearing retaining ring 7 is provided on the hollow inner rod 1 outside the inner bearing 3, and an outer bearing retaining ring 8 is provided on the hollow inner rod 1 outside the outer bearing 4 to prevent the inner bearing 3 and the outer bearing 4 from axially moving.

[0034] Working principle description:

[0035] The outer bearing 4 is used to cooperate with the track on the printer frame. The transmission gear 5 is used to cooperate with an external rack. The rack is parallel to the track. The printing medium is wound around the tension rod. The tension rod flattens the printing medium by its own weight. At the same time, under the action of the tension force, the printing medium drives the tension rod to reciprocate in the track. Among them, the rack is mainly used to enable the two ends of the tension rod to move synchronously.

[0036] The hollow outer rod 2 and the hollow inner rod 1 are rotatably engaged with each other. The printing medium is in contact with the hollow outer rod 2, and the hollow outer rod 2 will not rotate with the hollow inner rod 1, which plays a protective role for the printing medium.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: still modifications can be made to the specific implementation manners of the present invention or equivalent replacements can be made to some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered by the scope of the technical solutions claimed by the present invention.

Claims

1. A lightweight tension rod assembly, characterized in that: It includes a hollow inner rod, a hollow outer rod, an inner bearing, an outer bearing and a transmission gear; The hollow outer rod is sleeved outside the hollow inner rod. Both ends of the hollow inner rod are installed in the inner holes at both ends of the hollow outer rod through the inner bearings, and the hollow outer rod and the hollow inner rod are rotatably matched with each other; The outermost end of the hollow inner rod extends beyond the end of the hollow outer rod, and the outermost end of the hollow inner rod is installed with the outer bearing and the transmission gear.

2. The lightweight tension rod assembly according to claim 1, wherein: The inner holes at both ends of the hollow outer rod are set as stepped holes, the inner bearing is installed in the stepped holes, and the hollow inner rod is arranged through the stepped holes.

3. The lightweight tension rod assembly according to claim 1 or 2, characterized in that: The hollow inner rod is a metal rod or a plastic rod.

4. The lightweight tension rod assembly according to claim 1 or 2, characterized in that: The hollow outer rod is a metal rod or a plastic rod.

5. The lightweight tension rod assembly according to claim 1 or 2, characterized in that: The transmission gear is installed on the hollow inner rod between the inner bearing and the outer bearing, and the transmission gear is fixedly connected with the hollow inner rod.

6. The lightweight tension rod assembly according to claim 5, wherein: A gear retaining ring is installed at one end of the transmission gear close to the hollow outer rod.

7. The lightweight tension rod assembly according to claim 6, characterized in that: An inner bearing retaining ring is arranged on the hollow inner rod outside the inner bearing.

8. The lightweight tension rod assembly according to claim 7, wherein: An outer bearing retaining ring is arranged on the hollow inner rod outside the outer bearing.

9. The lightweight tension rod assembly according to claim 8, wherein: A circular boss is arranged on one side of the transmission gear close to the outer bearing.

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