A linear guide for CNC machine tools with adjustable counterweight

Abstract

This utility model discloses a linear guide rail for CNC machine tools with adjustable counterweights, including a base. Linear guide rails are fixedly mounted on both sides of the top of the base, and the two linear guide rails are slidably connected to a slider. A first U-shaped frame is fixedly mounted on one side of the top of the slider. This utility model features a first fixed pulley on the slider and a second fixed pulley on the base, connected by a transmission belt. A T-shaped frame at the other end of the transmission belt is slidably connected to the inner wall of the U-shaped guide rail. Limiting pins are mounted on the T-shaped frame, and multiple counterweight plates are inserted through these pins. By inserting counterweight plates through the T-shaped frame and easily increasing or decreasing the number of counterweights, the stress state of the entire guide rail system can be flexibly adjusted according to different processing tasks or slider load changes. This helps optimize motion smoothness and reduce impact and vibration during operation.

Description

Technical Field

[0001] This utility model relates to a linear guide for CNC machine tools, and more particularly to a linear guide for CNC machine tools with adjustable counterweight. Background Technology

[0002] Linear guides are key components in CNC machine tools used to achieve high-precision linear motion. They are typically mounted on the bed or column and used in conjunction with a slide block. Through rolling elements (such as steel balls or rollers) rolling between the guide and the slide block, the motion friction is changed from sliding friction to rolling friction, significantly improving the smoothness of motion, positioning accuracy, and response speed.

[0003] The slider of a conventional linear guide is greatly affected by the fixed mass and the changes in machining load, and cannot flexibly adjust the load balance according to the actual working conditions. This results in unsatisfactory operation under heavy or light loads and limited motion performance. Therefore, there is an urgent need for a linear guide for CNC machine tools with adjustable counterweight.

[0004] It should be noted that the above content falls within the scope of the technical knowledge of the utility model owner and does not necessarily constitute prior art. Utility Model Content

[0005] To address the aforementioned problems, the purpose of this invention is to provide a linear guide for CNC machine tools with adjustable counterweight.

[0006] To achieve the above objectives, this utility model proposes a linear guide rail for CNC machine tools with adjustable counterweight, including a base:

[0007] Linear guide rails are fixedly provided on both sides of the top of the base, and the two linear guide rails are slidably connected to the slider.

[0008] A first U-shaped frame is fixedly provided on one side of the top of the slider, and a second U-shaped frame is fixedly provided at the middle position of one side of the top of the base. A first fixed pulley and a second fixed pulley are respectively rotatably provided on both sides of the inner wall of the first U-shaped frame and the inner walls of the second U-shaped frame. The first fixed pulley and the second fixed pulley are connected by a transmission belt. A T-shaped frame is fixedly provided at one end of the transmission belt. A base plate is fixedly provided at the bottom of one side of the T-shaped frame. Limiting pins are fixedly provided on both sides of the top of the base plate. Multiple counterweight plates are interspersed between the two limiting pins.

[0009] In one example, two crossbeams are fixedly provided at the middle position of one end of the base, one end of the two crossbeams is fixedly connected to both sides of the top of the U-shaped slide rail, and the two ends of the T-shaped frame are interlocked with the interior of the U-shaped slide rail.

[0010] In one example, damping buffer columns are fixedly provided on both sides of the bottom end of the inner wall of the U-shaped slide rail, and the top ends of the two damping buffer columns are fixedly connected to both sides of the bottom end of the buffer pad.

[0011] In one example, multiple counterweight plates have the same weight.

[0012] The linear guide rail for CNC machine tools with adjustable counterweight proposed in this utility model can bring the following beneficial effects:

[0013] This invention features a first fixed pulley on a slider and a second fixed pulley on a base, connected by a transmission belt. A T-shaped frame at the other end of the transmission belt slides slidably against the inner wall of a U-shaped guide rail. Limiting posts are mounted on the T-shaped frame, with multiple counterweight plates inserted through them. By inserting these counterweight plates into the T-shaped frame and easily increasing or decreasing the number of counterweights, the stress state of the entire guide rail system can be flexibly adjusted according to different processing tasks or changes in slider load. This helps optimize motion smoothness, reduces impact and vibration during operation, and the addition of counterweights effectively offsets the effects of the slider's own weight and external load changes, resulting in smoother slider movement on the guide rail. It avoids motion jamming or shaking caused by uneven load, thus improving the machining accuracy of CNC machine tools. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the T-shaped frame of this utility model;

[0017] Figure 3 This utility model Figure 1 Enlarged view of point A in the middle.

[0018] In the diagram: 1. Base; 2. Linear guide rail; 3. Slider; 4. First U-shaped frame; 5. First fixed pulley; 6. Second U-shaped frame; 7. Second fixed pulley; 8. T-shaped frame; 9. Cross frame; 10. U-shaped slide rail; 11. Limiting pin; 12. Base plate; 13. Counterweight plate; 15. Damping buffer column; 16. Buffer pad; 17. Transmission belt. Detailed Implementation

[0019] To more clearly illustrate the overall concept of this utility model, a detailed description is provided below with reference to the accompanying drawings.

[0020] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "a solution," "some solutions," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that solution or example is included in at least one solution or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same solution or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more solutions or examples.

[0024] like Figures 1-3 As shown, an embodiment of this utility model proposes a linear guide rail for a CNC machine tool with adjustable counterweight, including a base 1:

[0025] Linear guide rails 2 are fixedly provided on both sides of the top of the base 1, and the two linear guide rails 2 are slidably connected to the slider 3.

[0026] A first U-shaped frame 4 is fixedly provided on one side of the top of the slider 3, and a second U-shaped frame 6 is fixedly provided at the middle position of one side of the top of the base 1. A first fixed pulley 5 and a second fixed pulley 7 are respectively rotatably provided on both sides of the inner wall of the first U-shaped frame 4 and the inner sides of the second U-shaped frame 6. The first fixed pulley 5 and the second fixed pulley 7 are connected by a transmission belt 17. A T-shaped frame 8 is fixedly provided at one end of the transmission belt 17. A base plate 12 is fixedly provided at the bottom of one side of the T-shaped frame 8. Limiting pins 11 are fixedly provided on both sides of the top of the base plate 12. Multiple counterweight plates 13 are interspersed between the two limiting pins 11.

[0027] Specifically, two crossbeams 9 are fixedly provided at the middle position of one end of the base 1. One end of the two crossbeams 9 is fixedly connected to both sides of the top of the U-shaped slide rail 10, and the two ends of the T-shaped frame 8 are interlocked with the interior of the U-shaped slide rail 10.

[0028] Specifically, damping buffer columns 15 are fixedly provided on both sides of the bottom end of the inner wall of the U-shaped slide rail 10, and the top ends of the two damping buffer columns 15 are fixedly connected to the two sides of the bottom end of the buffer pad 16.

[0029] Specifically, the weights of the multiple counterweight plates 13 are the same.

[0030] Working principle: First, the slider 3 is installed on the two linear guide rails 2 at the top of the base 1, ensuring that the slider 3 can slide smoothly on the linear guide rails 2. A first U-shaped frame 4 is fixedly installed at the top of the slider 3. Simultaneously, a second U-shaped frame 6 is fixedly installed at the middle position on one side of the base 1. A first fixed pulley 5 and a second fixed pulley 7 are rotatably installed on both sides of the inner wall of the first U-shaped frame 4 and the inner wall of the second U-shaped frame 6, respectively. The first fixed pulley 5 and the second fixed pulley 7 are connected by a transmission belt 17. One end of the transmission belt 17 is fixedly connected to the T-shaped frame 8. Depending on the weight of the workpiece carried by the CNC machine tool slider 3 or the processing requirements, the operator can increase or decrease the number of counterweight plates 13 on the limit pins 11. When the load on the slider 3 is heavy, the number of counterweight plates 13 is increased to improve the overall counterweight and offset the downward pressure from the slider and load. When the load on the slider 3 is light, the number of counterweight plates 13 is reduced to avoid excessive counterweight causing movement obstruction or increased energy consumption. By adjusting the number of counterweight plates 13, the transmission belt... 17. Pulling the T-shaped frame 8 generates an appropriate upward (or horizontal) auxiliary force, thereby maintaining the motion balance of the slider 3 on the guide rail 2. When the CNC machine tool issues a motion command, the slider 3 slides along the linear guide rail 2 under the action of the drive mechanism (such as a servo motor). During the sliding process, the slider 3 drives the first U-shaped frame 4 fixed on it to move, thereby driving the synchronous movement of the transmission belt 17 through the first fixed pulley 5. Since one end of the transmission belt 17 is fixedly connected to the T-shaped frame 8, the movement direction of the slider 3 and the change in the tension of the transmission belt 17 drive the T-shaped frame 8 to slide synchronously inside the U-shaped slide rail 10. When the slider 3 moves forward, the T-shaped frame 8 slides in the same direction inside the U-shaped slide rail 10; when the slider 3 moves in the opposite direction, the T-shaped frame 8 also slides in the opposite direction. A damping buffer column 15 is fixed at the bottom of the inner wall of the U-shaped slide rail 10. The damping buffer column 15 is connected to the buffer pad 16 to provide buffer when the T-shaped frame 8 slides to the extreme positions at both ends, preventing impact and improving the flexibility and safety of the overall movement.

[0031] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0032] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A linear guide for a CNC machine tool with adjustable counterweight, comprising a base (1): Linear guide rails (2) are fixedly provided on both sides of the top of the base (1), and the two linear guide rails (2) are slidably connected to the slider (3). characterized in that A first U-shaped frame (4) is fixedly provided on one side of the top of the slider (3), and a second U-shaped frame (6) is fixedly provided at the middle position of one side of the top of the base (1). A first fixed pulley (5) and a second fixed pulley (7) are respectively rotatably provided on both sides of the inner wall of the first U-shaped frame (4) and the inner sides of the second U-shaped frame (6). The first fixed pulley (5) and the second fixed pulley (7) are connected by a transmission belt (17). A T-shaped frame (8) is fixedly provided at one end of the transmission belt (17). A base plate (12) is fixedly provided at the bottom of one side of the T-shaped frame (8). Limiting pins (11) are fixedly provided on both sides of the top of the base plate (12). Multiple counterweight plates (13) are interspersed between the two limiting pins (11).

2. The linear guide rail with adjustable counterweight for numerical control machine tool according to claim 1, characterized in that: Two crossbars (9) are fixedly provided at the middle position of one end of the base (1). One end of the two crossbars (9) is fixedly connected to both sides of the top of the U-shaped slide rail (10). The two ends of the T-shaped frame (8) are interlocked with the inside of the U-shaped slide rail (10).

3. The linear guide rail with adjustable counterweight for numerical control machine tool according to claim 2, characterized in that: Damping buffer columns (15) are fixedly provided on both sides of the bottom of the inner wall of the U-shaped slide rail (10), and the top of the two damping buffer columns (15) are fixedly connected to both sides of the bottom of the buffer pad (16).

4. The linear guide rail with adjustable counterweight for numerical control machine tool according to claim 1, characterized in that: The weights of the multiple counterweight plates (13) are the same.

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