Linear shaft

Abstract

The present utility model relates to a linear shaft, comprising an outer shaft. The outer shaft is internally provided with a cylindrical cavity coaxially arranged with the outer shaft, the cavity is internally provided with a regular trilateral prism-shaped inner shaft coaxially arranged with the outer shaft, and three edges of the inner shaft are respectively fixedly connected to the inner wall of the outer shaft. The present utility model increases the strength of a hollow linear shaft by using the characteristics of the stability of triangles and a stronger bearing capacity of an arc structure with fixed endpoints. The linear shaft of the present utility model has a simple structure and is easy to process; in addition, the cavities between the outer shaft and the inner shaft are conducive to passing devices such as wires, thus making the linear shaft more convenient to use.

Description

A linear optical axis Technical Field

[0001] The utility model relates to a linear optical axis. Background Art

[0002] Optical shafts, also known as guide shafts, guide rods, and guide posts, function like sliding bearings to guide linear motion and are widely used in various industrial machinery and supporting equipment. These include standard linear optical shafts, chrome-plated linear optical shafts, chrome-plated flexible linear shafts, stainless steel linear shafts, and chrome-plated hollow shafts. The hollow structure of chrome-plated hollow shafts significantly reduces weight and simplifies the structure, making them suitable for inserting side wires, compressed air, lubricating oil, and even for use in robotic arms.

[0003] Although hollow shafts have certain advantages, the presence of their cavities correspondingly reduces the stress-bearing strength of the hollow shafts. Existing hollow shafts generally use cylindrical cavities, such as Chinese utility model patents CN202022078751.9, a highly wear-resistant hollow linear optical shaft for guide rail automation, CN202220870164.X, a hollow linear optical shaft for automation equipment, and CN202122525471.2, a highly wear-resistant hollow linear optical shaft. In order to improve the strength of the hollow shaft, improvements have been made to the hollow shaft cavity, but the improved structure is relatively complex and inconvenient to process. The starting point of the present invention is how to provide a linear optical shaft that has a simple structure, can improve the strength of the hollow shaft, and is relatively convenient to use. Technical issues

[0004] In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is how to provide a hollow linear optical axis with a simple structure and easy processing and use. Technical Solutions

[0005] The technical solution of the utility model to solve the above technical problems is:

[0006] A linear optical axis includes an outer shaft, wherein a cylindrical cavity is provided inside the outer shaft and is coaxially arranged with the outer shaft, and an inner shaft in the shape of a regular triangular prism is provided inside the cavity and is coaxially arranged with the outer shaft, wherein the three sides of the inner shaft are respectively fixedly connected to the inner wall of the outer shaft.

[0007] Preferably, three sides of the inner shaft extend into the inner wall of the outer shaft.

[0008] Preferably, arc-shaped protrusions are provided on three sides of the inner shaft, and the protrusions are inside the inner wall of the outer shaft.

[0009] Preferably, the material of the inner shaft is carbon steel, and the material of the outer shaft is nickel alloy carbon steel.

[0010] Preferably, the inner shaft and the outer shaft are of equal length and are arranged in the cavity.

[0011] Preferably, a second cavity is provided in the inner shaft, and a support shaft is provided in the second cavity and is coaxially arranged with the outer shaft, and the support shaft is tangent to three inner walls of the second cavity.

[0012] Preferably, the inner shafts are arranged in the cavity of the outer shaft at equal intervals.

[0013] Preferably, the inner shafts are connected together via a connecting shaft. Beneficial effects

[0014] The present invention offers advantages over existing technologies: A triangular prism is positioned within the outer shaft cavity to support the linear optical axis, leveraging the stability of the triangle to strengthen the cavity. Furthermore, from an axial perspective, the outer and inner shafts form an arched structure that divides the outer shaft into three equal parts, allowing the outer shaft between two adjacent sides of the inner shaft to withstand greater external forces. The present invention utilizes the stability of the triangle and the greater bearing capacity of the arc at the fixed endpoints to enhance the strength of the hollow linear optical axis. The present invention has a simple structure and is easy to manufacture. Furthermore, the cavity between the outer and inner shafts facilitates the passage of wires and other devices, making it more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of an embodiment of the present invention;

[0016] Figure 2 is a cross-sectional view 1 of an embodiment of the present invention;

[0017] Figure 3 is a schematic diagram 2 of an embodiment of the present invention;

[0018] Figure 4 is a cross-sectional view 2 of an embodiment of the present invention;

[0019] Figure 5 is a schematic diagram of Example 1 of the present utility model;

[0020] Figure 6 is a schematic diagram 1 of embodiment 2 of the present invention;

[0021] Figure 7 is a schematic diagram 2 of embodiment 2 of the present invention;

[0022] FIG8 is a schematic diagram of embodiment 3 of the present invention.

[0023] Reference numerals: 1. outer shaft, 2. cavity, 3. inner shaft, 4. protrusion, 5. connecting shaft, 6. second cavity, 7. supporting shaft. Best Mode for Carrying Out the Invention

[0024] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. However, this embodiment is not intended to limit the present invention. Any similar structure and similar variations of the present invention should be included in the scope of protection of the present invention. Example 1

[0025] As shown in Figures 1 to 4, a linear optical axis comprises an outer axis 1, wherein the outer axis 1 has a cylindrical cavity 2 disposed coaxially therewith. Within the cavity 2 is an inner axis 3 in the shape of a regular triangular prism disposed coaxially therewith. The three sides of the inner axis 3 are fixedly connected to the inner wall of the outer axis 1, utilizing the stability of the triangle to strengthen the cavity of the linear optical axis. To further secure the connection between the inner and outer axes, the three sides of the inner axis 3 extend into the inner wall of the outer axis. Furthermore, the three sides of the inner axis 3 are provided with arc-shaped protrusions 4, which are located within the inner wall of the outer axis 1. This utility model utilizes the stability of the triangle and the greater bearing capacity of the arc with fixed endpoints to enhance the strength of the hollow linear optical axis. During processing, the outer shaft 1 and inner shaft 3 can be processed separately and then joined together. Of course, the outer shaft 1 and inner shaft 3 can also be processed simultaneously using a mold as a whole. The materials of the inner shaft 3 and outer shaft 1 can be the same or different. If they are different, the inner shaft 3 is made of carbon steel and the outer shaft 1 is made of nickel alloy carbon steel. As shown in Figure 5, the inner shaft 3 and outer shaft 1 are of equal length and are arranged in the cavity 2. Example 2

[0026] As shown in Figures 1 to 4, a linear optical axis comprises an outer axis 1, wherein the outer axis 1 has a cylindrical cavity 2 disposed coaxially therewith. Within the cavity 2 is an inner axis 3 in the shape of a regular triangular prism disposed coaxially therewith. The three sides of the inner axis 3 are fixedly connected to the inner wall of the outer axis 1, utilizing the stability of the triangle to strengthen the cavity of the linear optical axis. To further secure the connection between the inner and outer axes, the three sides of the inner axis 3 extend into the inner wall of the outer axis. Furthermore, the three sides of the inner axis 3 are provided with arc-shaped protrusions 4, which are located within the inner wall of the outer axis 1. This utility model utilizes the stability of the triangle and the greater bearing capacity of the arc with fixed endpoints to enhance the strength of the hollow linear optical axis. During processing, the outer shaft 1 and inner shaft 3 can be machined separately and then joined together. Alternatively, the outer shaft 1 and inner shaft 3 can be machined together using a mold as a single unit. The materials of the inner shaft 3 and outer shaft 1 can be the same or different. If they are different, the inner shaft 3 is made of carbon steel and the outer shaft 1 is made of nickel alloy carbon steel. As shown in Figure 6 , the inner shafts 3 are evenly spaced within the cavity 2 of the outer shaft 1 . To enhance the strength of the linear optical axis, the inner shafts 3 are connected together by connecting shafts 5 , as shown in Figure 7 . Example 3

[0027] As shown in Figures 1 to 4, a linear optical axis comprises an outer axis 1, wherein the outer axis 1 has a cylindrical cavity 2 disposed coaxially therewith. Within the cavity 2 is an inner axis 3 in the shape of a regular triangular prism disposed coaxially therewith. The three sides of the inner axis 3 are fixedly connected to the inner wall of the outer axis 1, utilizing the stability of the triangle to strengthen the cavity of the linear optical axis. To further secure the connection between the inner and outer axes, the three sides of the inner axis 3 extend into the inner wall of the outer axis. Furthermore, the three sides of the inner axis 3 are provided with arc-shaped protrusions 4, which are located within the inner wall of the outer axis 1. This utility model utilizes the stability of the triangle and the greater bearing capacity of the arc with fixed endpoints to enhance the strength of the hollow linear optical axis. During processing, the outer shaft 1 and the inner shaft 3 can be processed separately and then combined. Of course, the outer shaft 1 and the inner shaft 3 can also be processed as a whole using a mold at the same time. The materials of the inner shaft 3 and the outer shaft 1 can be the same or different. If they are different, the material of the inner shaft 3 is carbon steel and the material of the outer shaft 1 is nickel alloy carbon steel. As shown in Figure 5, the inner shaft 3 and the outer shaft 1 are arranged in the cavity 2 with the same length. As shown in Figure 8, in order to reduce the weight of the linear optical axis, a second cavity 6 is provided in the inner shaft 3. However, the presence of the second cavity 6 will affect the strength of the optical axis. Therefore, a support shaft 7 is provided in the second cavity 6, which is coaxial with the outer shaft 1. The support shaft 7 is tangent to the three inner walls of the second cavity 6.

[0028] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that do not require creative effort should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection defined in the claims.

Claims

1. A linear optical axis, comprising an outer axis (1), characterized in that: A cylindrical cavity (2) coaxially arranged with the outer shaft (1) is provided in the outer shaft (1), and a regular triangular prism-shaped inner shaft (3) coaxially arranged with the outer shaft (1) is provided in the cavity (2), and the three sides of the inner shaft (3) are respectively fixedly connected to the inner wall of the outer shaft (1).

2. A linear optical axis according to claim 1, characterized in that: Three edges of the inner shaft (3) extend into the inner wall of the outer shaft.

3. A linear optical axis according to claim 2, characterized in that: Arc-shaped protrusions (4) are provided on three sides of the inner shaft (3), and the protrusions (4) are inside the inner wall of the outer shaft (1).

4. A linear optical axis according to claim 3, characterized in that: The material of the inner shaft (3) is carbon steel, and the material of the outer shaft (1) is nickel alloy carbon steel.

5. A linear optical axis according to any one of claims 1 to 4, characterized in that: The inner shaft (3) and the outer shaft (1) are arranged in the cavity (2) with the same length.

6. A linear optical axis according to claim 5, characterized in that: A second cavity (6) is provided in the inner shaft (3), a support shaft (7) coaxially arranged with the outer shaft (1) is provided in the second cavity (6), and the support shaft (7) is tangent to three inner walls of the second cavity (6).

7. A linear optical axis according to any one of claims 1 to 4, characterized in that: The inner shafts (3) are arranged at equal intervals in the cavity (2) of the outer shaft (1).

8. A linear optical axis according to claim 7, characterized in that: The inner shafts (3) are connected together via a connecting shaft (5).

Images