Adjustable resistance numerical control machine tool linear guide rail

Abstract

The utility model discloses a kind of adjustable resistance numerical control machine tool linear guide rails, including linear guide rail: the two sides of the linear guide rail are provided with adjustable resistance mechanism;The adjustable resistance mechanism includes two groups of symmetrically arranged pulleys slidingly arranged with the inner wall both sides of linear guide rail, and the top end of the inner wall and the bottom end of the inner wall of corresponding U-shaped support inner wall are rotatably connected with the two ends of four The utility model is provided with adjustable resistance mechanism on linear guide rail, servo motor output end drives gear to rotate, gear and two racks are mutually engaged, and two racks can thus move towards each other, to drive the pulley rotating inside two U-shaped frames to move towards each other, gradually increase or reduce the pressure of pulley to linear guide rail inner groove, can accurately, real-time adjust the pressure of pulley to guide rail inner groove, realize the fine controllable of friction resistance, satisfy different requirements to movement damping under different working conditions.

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 resistance. 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] Ordinary linear guides have fixed friction resistance set at the factory, which cannot be flexibly adjusted according to actual processing requirements. This results in the inability to achieve optimal performance matching under different speeds and loads. Therefore, there is an urgent need for a CNC machine tool linear guide with adjustable resistance.

[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 an adjustable resistance linear guide for CNC machine tools.

[0006] To achieve the above objectives, this utility model proposes an adjustable resistance linear guide for CNC machine tools, comprising:

[0007] The linear guide rail is equipped with adjustable resistance mechanisms on both sides.

[0008] The adjustable resistance mechanism includes two sets of symmetrically arranged pulleys that slide on both sides of the inner wall of the linear guide rail. The two ends of the four pulleys are rotatably connected to the top and bottom of the inner wall of the corresponding U-shaped bracket, respectively. The four U-shaped brackets are fixedly arranged at the bottom of the inner side of the corresponding side frame. The top of each side frame is fixedly connected to one end of the corresponding rack. Every two adjacent racks are slidably connected to the top of the inner walls of the corresponding frame.

[0009] In one example, a base is fixedly provided at the middle position of the top of the two frames, and a servo motor is fixedly provided at the top of each of the two bases. The output end of each servo motor is fixedly connected to the top of the gear through a connecting shaft.

[0010] In one example, support frames are fixedly provided on both sides of the top of the two frames, and the top of the four support frames are fixedly connected to the four corners of the bottom of the mounting frame.

[0011] In one example, the outer walls of all four pulleys are fitted with rubber bushings.

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

[0013] This invention incorporates an adjustable resistance mechanism on a linear guide rail. The output of a servo motor drives a gear to rotate, which meshes with two racks. The two racks then move towards each other, causing the pulleys inside the two U-shaped frames to move towards each other. This gradually increases or decreases the pressure of the pulleys on the inner groove of the linear guide rail, enabling precise and real-time adjustment of the pressure. This achieves fine and controllable frictional resistance, meeting different requirements for motion damping under various working conditions. Furthermore, the resistance can be flexibly adjusted according to the processing load, speed requirements, vibration control, and other factors of the CNC machine tool, improving the system's adaptability and stability in different environments. 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 adjustable resistance mechanism of this utility model;

[0017] Figure 3 This is a schematic diagram of the rack and gear structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the U-shaped bracket and pulley of this utility model.

[0019] In the diagram: 1. Linear guide rail; 3. Pulley; 4. U-shaped bracket; 5. Side frame; 6. Frame; 7. Rack; 9. Base; 10. Servo motor; 11. Gear; 12. Support frame; 13. Rubber ferrule. Detailed Implementation

[0020] To more clearly illustrate the overall concept of this utility model, a detailed description is provided below with reference to the accompanying drawings.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] like Figures 1-4 As shown, an embodiment of this utility model proposes an adjustable resistance linear guide for CNC machine tools, including linear guide 1:

[0026] Adjustable resistance mechanisms are provided on both sides of the linear guide rail 1;

[0027] The adjustable resistance mechanism includes two sets of symmetrically arranged pulleys 3 that slide on both sides of the inner wall of the linear guide rail 1. The two ends of the four pulleys 3 are rotatably connected to the top and bottom of the inner wall of the corresponding U-shaped bracket 4, respectively. The four U-shaped brackets 4 are fixedly arranged at the bottom of the inner side of the corresponding side frame 5. The top of each side frame 5 is fixedly connected to one end of the corresponding rack 7. Every two adjacent racks 7 are slidably connected to the top of both sides of the inner wall of the corresponding frame 6.

[0028] Specifically, a base 9 is fixedly provided at the middle position of the top of the two frames 6, and a servo motor 10 is fixedly provided at the top of each of the two bases 9. The output end of the servo motor 10 is fixedly connected to the top of the gear 11 through a connecting shaft.

[0029] Specifically, support frames 12 are fixedly provided on both sides of the top of the two frames 6, and the top of the four support frames 12 are fixedly connected to the four corners of the bottom of the mounting frame 2.

[0030] Specifically, the outer walls of the four pulleys 3 are fitted with rubber sleeves 13.

[0031] Working principle: The linear guide 1 is installed on the base or worktable of the CNC machine tool. On both sides of the linear guide 1, there is an adjustable resistance mechanism. Each mechanism includes: two symmetrically arranged pulleys 3, U-shaped supports 4, side frames 5, racks 7, and a frame 6. The two ends of each pulley 3 are rotatably connected to the top and bottom of the corresponding U-shaped support 4 via bearings. The four U-shaped supports 4 are fixed to the bottom inner side of the side frames 5. Support frames 12 are provided on both sides of the top of the frame 6. The upper end of the support frame 12 is fixedly connected to the mounting frame 2 to maintain the stability of the device. A rubber ring 13 is fitted on the outer wall of each pulley 3 to enhance the frictional contact between the pulley and the inner groove of the linear guide 1. When the resistance of the linear guide 1 needs to be adjusted, the control system sends a command to the servo motor 10. The servo motor 10 starts, and its output shaft drives the connecting shaft to rotate. The connecting shaft drives the gear 11 to rotate synchronously. The gear 11 meshes with the racks 7 on both sides. Due to the opposite installation method of the racks 7, the gears... When gear 11 rotates, the two racks 7 will move synchronously towards or away from each other. Driven by gear 11, the two racks 7 begin to move. Since each rack 7 is fixedly connected to a side frame 5, the movement of the rack 7 will drive the side frame 5 to make a linear translational motion. The direction of movement of the side frame 5 depends on the direction of rotation of the servo motor 10. When the U-shaped bracket 4 moves towards the inside of the linear guide rail 1, the outer surface of the pulley 3 (covered with a rubber sleeve 13) gradually presses against the inner groove wall of the guide rail 1. As it gets closer, the contact pressure exerted by the pulley 3 on the inner wall of the guide rail 1 increases. Conversely, when the U-shaped bracket 4 moves towards the outside, the pressure exerted by the pulley 3 on the inner wall of the guide rail 1 gradually decreases. When the pressure of the pulley 3 on the inner wall of the guide rail 1 increases, the frictional resistance increases accordingly. This is suitable for use in heavy-load, low-speed processing applications where system rigidity needs to be improved. When the pressure of the pulley 3 on the inner wall of the guide rail 1 decreases, the frictional resistance decreases. This is suitable for use in high-speed, precision motion applications where vibration needs to be reduced.

[0032] 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.

[0033] 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. An adjustable resistance linear guide for CNC machine tools, comprising a linear guide (1): Its features are: The linear guide (1) is provided with adjustable resistance mechanisms on both sides; The adjustable resistance mechanism includes two sets of symmetrically arranged pulleys (3) that slide on both sides of the inner wall of the linear guide rail (1). The two ends of the four pulleys (3) are rotatably connected to the top and bottom of the inner wall of the corresponding U-shaped bracket (4). The four U-shaped brackets (4) are fixedly arranged at the bottom of the inner side of the corresponding side frame (5). The top of each side frame (5) is fixedly connected to one end of the corresponding rack (7). Every two adjacent racks (7) are slidably connected to the top of both sides of the inner wall of the corresponding frame (6).

2. The adjustable resistance linear guide for CNC machine tools according to claim 1, characterized in that: A base (9) is fixedly provided at the middle position of the top of the two frames (6), and a servo motor (10) is fixedly provided at the top of each of the two bases (9). The output end of the servo motor (10) is fixedly connected to the top of the gear (11) through a connecting shaft.

3. The adjustable resistance linear guide for CNC machine tools according to claim 2, characterized in that: Both sides of the top of the two frames (6) are fixedly provided with support frames (12), and the top of the four support frames (12) are fixedly connected to the four corners of the bottom of the mounting frame (2).

4. The adjustable resistance linear guide for CNC machine tools according to claim 1, characterized in that: The outer walls of the four pulleys (3) are fitted with rubber rings (13).

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