An adjustable ball bearing lever

Abstract

This utility model discloses an adjustable ball bearing lever, including a base, an upper mounting cylinder, a support rod inserted into the mounting cylinder, a fixing post on the outer wall of the support rod, and a lever arm on the outside of the fixing post. The lever arm consists of two levers and a fixing block, which are connected to a screw via connecting bolts. A ball bearing body is threaded through the fixing block and fitted onto the outer wall of the fixing post, which is secured by fixing bolts. This utility model utilizes a modular aluminum rod of suitable length and specifications, which is then assembled according to design requirements to form the main structure of the lever, ensuring a stable connection. A colored scale device is accurately fixed to the lever using colored marking strips to ensure clear and precise graduations, facilitating subsequent lever arm measurement. Alternatively, the graduations and colored marking blocks can be pre-engraved on the lever at the factory.

Description

Technical Field

[0001] This utility model relates to the field of lever technology, and in particular to an adjustable ball bearing lever. Background Technology

[0002] A lever is a simple mechanical device, typically consisting of a rigid rod that can rotate around a fixed point under the action of a force. In a lever, the positional relationship between the fulcrum, the point of application of effort, and the point of application of resistance, as well as the length of the lever arm, determines whether the lever requires less or more effort. For the lever to be balanced, the effort arm must be several times the resistance arm, and the resistance must be several times the effort.

[0003] The lever ruler in the existing technology is prone to slight deformation after long-term use, which leads to errors in lever arm measurement. Secondly, the friction at the fulcrum is large, which consumes extra power and affects the balance accuracy. Furthermore, it is inconvenient to operate, and the slider of some instruments gets stuck. When adjusting the lever arm, excessive force is required, which can easily damage the lever and increase the difficulty of operation. In addition, the length of the lever arm cannot be adjusted. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies. It utilizes modular aluminum rods of suitable length and specifications, which are then assembled according to design requirements to form the main structure of a lever, ensuring a stable connection between the rods. Color-coded marking strips are then used to accurately fix a colored scale device on the lever, ensuring clear and precise graduations for easy measurement of the lever arm. Alternatively, the scale and colored markings can be pre-engraved on the lever at the factory, resulting in an adjustable ball bearing lever.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An adjustable ball bearing lever includes a base, an upper mounting cylinder at the base, a support rod inserted into the mounting cylinder, a fixing post on the outer wall of the support rod, and a lever arm on the outside of the fixing post. The lever arm consists of two levers and a fixing block, which are connected to a screw via connecting bolts. A ball bearing body passes through the fixing block and is fitted onto the outer wall of the fixing post. A fixing bolt is provided on the outer wall of the fixing post and is threadedly connected to the outer wall of the fixing post. Adjusting screws are provided at both ends of the lever arm, and adjusting bolts that cooperate with the adjusting screws are provided on the outer wall of the adjusting screws.

[0006] Preferably, the front end of the lever arm is provided with a scale, the scale is a colored marking bar, and both ends of the lever arm are slidably connected to a movable frame, the lower end of the movable frame is provided with a hook.

[0007] Preferably, the upper end of the lever arm is provided with a fixing plate, the fixing plate is located in the middle of the lever arm, and the fixing plate is semi-circular.

[0008] Preferably, a pointer is rotatably connected to the front end of the fixed plate, and the end of the pointer always points vertically downward.

[0009] Preferably, the outer wall of the fixing plate and the upper ends of both ends of the lever arm are provided with fixing frames, and the fixing frames are L-shaped.

[0010] Preferably, both fixed frames are provided with through slots, and a slider is slidably connected through the through slots. The lower end of the slider is provided with a connecting rod, and the connecting rod is connected to the upper end of the movable frame.

[0011] The beneficial effects of this utility model are: 1. Select suitable lengths and specifications of connectable aluminum rods and assemble them according to design requirements to form the main structure of the lever, ensuring a stable connection of the rods. Then, accurately fix the colored scale device on the lever using colored marking strips to ensure clear and accurate graduations for easy measurement of the lever arm. Alternatively, the graduations and colored marking blocks can be engraved directly on the lever at the factory.

[0012] 2. By employing a fulcrum device with a ball bearing body, the ball bearing body fulcrum device is installed at a suitable position on the lever, ensuring that the fulcrum is perpendicular to the lever. This allows the lever to rotate flexibly, reduces the impact of friction, and makes the experimental data more accurate and reliable. This effectively improves the experimental teaching effect and is highly feasible. Attached Figure Description

[0013] Figure 1 This is a front view schematic diagram of the overall structure of this utility model; Figure 2 This is a bottom view of the overall structure of this utility model; Figure 3 This is a top view of the overall structure of this utility model.

[0014] In the diagram: 1. Base, 2. Mounting cylinder, 3. Support rod, 4. Fixed column, 5. Lever arm, 6. Fixing bolt, 7. Scale, 8. Moving frame, 9. Hook, 10. Fixing plate, 11. Pointer, 12. Fixing frame, 13. Through groove, 14. Slider, 15. Connecting rod, 16. Adjusting screw, 17. Ball bearing body. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] Reference Figure 1-3 An adjustable ball bearing lever includes a base 1, an mounting cylinder 2 at the upper end of the base 1, a support rod 3 inserted inside the mounting cylinder 2, a fixing post 4 on the outer wall of the support rod 3, and a lever arm 5 on the outside of the fixing post 4. The lever arm 5 consists of two levers and a fixing block, which are connected to a screw via connecting bolts. A ball bearing body 17 is inserted through the fixing block and fitted onto the outer wall of the fixing post 4. By employing a fulcrum device with a ball bearing body, the fulcrum device is installed at a suitable position on the lever, ensuring that the fulcrum is perpendicular to the lever, allowing the lever to rotate flexibly, reducing the impact of friction, and making experimental data more accurate and reliable. This effectively improves the experimental teaching effect and has strong feasibility.

[0018] The outer wall of the fixed column 4 is provided with a fixing bolt 6, which is threaded to the outer wall of the fixed column 4. Both ends of the lever arm 5 are provided with adjusting screws 16, and the outer wall of the adjusting screws 16 is provided with adjusting bolts that cooperate with them.

[0019] The lever arm 5 has a scale 7 at its front end, which is a colored marker strip. Both ends of the lever arm 5 have slidingly connected movable frames 8. The lower end of each movable frame 8 has a hook 9. By selecting suitable lengths and specifications of connectable aluminum rods and assembling them according to design requirements, the main structure of the lever is formed, ensuring a stable connection. The colored marker strip is then used to accurately fix the colored scale device on the lever, ensuring clear and precise graduations for easy subsequent lever arm measurement. Alternatively, the scale and colored marker blocks can be directly engraved on the lever at the factory.

[0020] A fixing plate 10 is provided at the upper end of the lever arm 5. The fixing plate 10 is located in the middle of the lever arm 5 and is semi-circular.

[0021] A pointer 11 is rotatably connected to the front end of the fixed plate 10, and the end of the pointer 11 is always vertically downward.

[0022] The outer wall of the fixing plate 10 and the upper ends of both ends of the lever arm 5 are provided with fixing frames 12, which are L-shaped.

[0023] Both fixed frames 12 are provided with through slots 13, and sliders 14 are slidably connected through the through slots 13. A connecting rod 15 is provided at the lower end of the slider 14, and the connecting rod 15 is connected to the upper end of the movable frame 8.

[0024] When using this utility model: Interlocking levers: Multi-section aluminum alloy levers with circular cross-sections (other materials or cross-sections of other shapes can also be used) are connected by threads. The structural design has a single lever length of 5cm, is made of aluminum alloy, and has a circular cross-section (1cm in diameter). The levers are spirally connected to each other using a nut-bolt structure.

[0025] The ball bearing support mechanism is welded to the middle section of the lever as a fulcrum to reduce friction. A bearing mounting seat is welded to the middle section of the lever, housing a built-in 608ZZ type ball bearing (8mm inner diameter). The outer ring of the bearing is fixed by a snap ring, while the inner ring is rigidly connected to the lever. When the lever is under force, the outer ring of the bearing rotates with the lever, while the inner ring remains stationary, reducing frictional resistance by over 90%. The modular lever design allows for easy adjustment of the total lever arm length. Color marking strips: Each section is affixed with a scale marking strip and a conspicuous color marking strip (or it can be marked on the rod at the factory) to facilitate quick identification of the lever arm length. Each lever section is affixed with a high-precision scale strip (minimum scale 1mm); a color marking strip (such as red, blue, green) is set every 1cm to facilitate quick identification of the lever arm length.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An adjustable ball bearing lever, comprising a base (1), characterized in that, The base (1) has an upper end with an installation cylinder (2), a support rod (3) is inserted inside the installation cylinder (2), a fixing column (4) is provided on the outer wall of the support rod (3), and a lever arm (5) is provided on the outside of the fixing column (4). The lever arm (5) is composed of two levers and a fixing block. The two levers and the fixing block are connected to the screw by connecting bolts. A ball bearing body (17) is provided through the fixing block. The ball bearing body (17) is sleeved on the outer wall of the fixing column (4). A fixing bolt (6) is provided on the outer wall of the fixing column (4). The fixing bolt (6) is threadedly connected to the outer wall of the fixing column (4). An adjusting screw (16) is provided at both ends of the lever arm (5). An adjusting bolt that matches the adjusting screw (16) is provided on the outer wall of the adjusting screw (16).

2. The adjustable ball bearing lever according to claim 1, characterized in that, The lever arm (5) has a scale (7) at its front end. The scale (7) is a colored marking bar. The outer walls of both ends of the lever arm (5) are slidably connected to a movable frame (8). The lower end of the movable frame (8) is provided with a hook (9).

3. An adjustable ball bearing lever according to claim 2, characterized in that, The upper end of the lever arm (5) is provided with a fixing plate (10), the fixing plate (10) is located in the middle of the lever arm (5), and the fixing plate (10) is semi-circular.

4. An adjustable ball bearing lever according to claim 3, characterized in that, The front end of the fixed plate (10) is rotatably connected to a pointer (11), and the end of the pointer (11) is always vertically downward.

5. An adjustable ball bearing lever according to claim 4, characterized in that, The outer wall of the fixing plate (10) and the upper ends of both ends of the lever arm (5) are provided with fixing frames (12), and the fixing frames (12) are L-shaped.

6. An adjustable ball bearing lever according to claim 5, characterized in that, Both of the fixed frames (12) are provided with through slots (13), and a slider (14) is slidably connected through the through slots (13). A connecting rod (15) is provided at the lower end of the slider (14), and the connecting rod (15) is connected to the upper end of the movable frame (8).

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