A machine tool structure with stable lifting and high machining precision
By combining multiple non-coplanar linear guide slider mechanisms with lifting mechanisms on the machine tool, stable support and precise positioning of long shaft workpieces are achieved, solving the stability and accuracy problems of existing machine tools when machining long shaft workpieces and improving machining quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 赵进
- Filing Date
- 2025-09-10
- Publication Date
- 2026-08-04
AI Technical Summary
Existing machine tools suffer from poor stress stability and weak rigidity when machining long shaft workpieces, which can lead to workpiece positional shifts or vibrations, reducing machining accuracy and surface quality, and even increasing scrap rates.
By combining multiple parallel and non-coplanar linear guide slider mechanisms with a lifting mechanism, and through the embedded sliding and lifting adjustment of the moving seat, stable support and precise positioning of long shaft workpieces are achieved, the force on the workpiece is distributed, and processing vibration is avoided.
It improves the machining accuracy and surface quality of machine tools, ensures stable machining of long shaft workpieces, and avoids positional deviation and vibration during the machining process.
Smart Images
Figure CN224587615U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a machine tool structure with stable lifting and high machining accuracy. Background Technology
[0002] Machine tools are machines used to manufacture machines, also known as "mother machines" or "working machines," and are commonly referred to simply as "machine tools." They play a significant role in the modernization of the national economy and are the core equipment of the equipment manufacturing industry. Currently, when machine tools process workpieces, they first need to achieve stable and reliable clamping of the workpiece. Many existing clamping mechanisms use single or multiple parallel linear guide slider mechanisms that slide against a flat backplate, clamping the workpiece end by moving up and down. While this structure can meet basic requirements for conventional short-shaft workpieces, it is prone to significant shortcomings during the processing of long-shaft workpieces, such as poor stress stability and weak rigidity. This can lead to workpiece positional shifts or vibrations during processing, reducing machining accuracy and surface quality, and even increasing the scrap rate. Therefore, existing technologies still need improvement and development. Summary of the Invention
[0003] To address the shortcomings mentioned above, this utility model provides a machine tool structure with stable lifting and high machining accuracy.
[0004] To achieve the above objectives, this utility model provides a machine tool structure with stable lifting and high machining accuracy, including a base, a mounting frame, and a movable clamping assembly; The base is provided with at least one positioning clamp; The mounting bracket is fixed above the base and has a mounting groove on one side, with the groove opening facing the positioning clamp. The movable clamping assembly includes a movable seat, a linear guide slider mechanism, a lifting mechanism, and a movable pressing mechanism. The movable seat is at least partially movably disposed within the mounting groove, and its bottom wall is provided with a central seat corresponding to the positioning fixture. The central hole axis of the central seat is located within the area enclosed by the mounting groove. There are multiple linear guide slider mechanisms, which are disposed between the mounting frame and the movable seat. The multiple linear guide slider mechanisms are arranged in parallel and are not coplanar. The lifting mechanism is connected to the mounting frame and the movable seat respectively to drive the movable seat to move vertically up and down along the axis of the linear guide slider mechanism, thereby adjusting the position of the workpiece radially supported in the middle of the central seat. The movable pressing mechanism is disposed on the movable seat and corresponds to the positioning fixture, and cooperates to press or release the end of the workpiece.
[0005] Furthermore, the main body of the mounting groove cross-section is trapezoidal, and the multiple linear guide slider mechanisms are arranged in an equilateral quadrilateral. Two linear guide slider mechanisms are located near the two inner corners of the mounting groove, and two other linear guide slider mechanisms are located on the mounting frame walls on both sides of the mounting groove.
[0006] Furthermore, the linear guide rail slider mechanism includes a guide rail fixed on the mounting frame and a plurality of sliders fixed on the movable seat and slidingly engaged with the guide rail.
[0007] Furthermore, the top wall of the mounting frame is integrally provided with a mounting part inward at the mounting groove. The lifting mechanism includes a drive component, a lead screw, a guide block, and a bearing seat. The drive component is fixedly mounted on the mounting part. One end of the lead screw passes through the mounting part and is connected to the output shaft of the drive component, while the other end is rotatably connected to the inner wall of the mounting groove through the bearing seat. One end of the guide block is fixedly connected to the movable seat, while the other end is rotatably engaged with the lead screw.
[0008] Furthermore, the movable pressing mechanism includes a second guide rail, a second slider, a pressing component, and a second driving component. The second guide rail is fixedly mounted on the inner wall of the movable seat in a vertical direction. The pressing component is slidably engaged with the second guide rail through the second slider. The second driving component is located above the movable seat and its output end passes through the movable seat and is fixedly connected to the pressing component to drive the pressing component to move vertically up and down along the axis of the second guide rail.
[0009] Furthermore, it also includes a transmission assembly, which includes a drive component three fixed on the base and a belt drive mechanism, wherein the drive component three drives the positioning fixture to rotate through the belt drive mechanism.
[0010] The advantages of this utility model over the prior art are as follows: This utility model optimizes the structure, the movable seat can be embedded and slid relative to the mounting frame, the lifting is more stable, and the position of the central seat radially supporting the workpiece can be flexibly adjusted by the lifting mechanism so that it can accurately adapt to shaft workpieces of different lengths. In addition, the axis of the central hole of the central seat is always located in the area enclosed by the mounting groove, so that the force on the movable seat during workpiece processing can be dispersed, effectively avoiding local stress concentration, avoiding vibration during processing, and ensuring processing accuracy and surface quality. Attached Figure Description
[0011] Figure 1 This is a perspective view of a machine tool structure with stable lifting and high machining accuracy according to the present invention; Figure 2 This is a 3D view of the lifting mechanism involved in this solution. Detailed Implementation
[0012] like Figure 1 As shown in the figure, a machine tool structure with stable lifting and high machining accuracy according to an embodiment of the present invention includes a base 1, a mounting frame 3, and a movable clamping assembly 100; wherein, the base 1 is provided with at least one positioning fixture 2, and the positioning fixture 2 can be set one, two or more as needed in actual production. Figure 1 The image shows a dual-station setup, where positioning fixture 2 is used to position and clamp one end of the workpiece.
[0013] Furthermore, such as Figure 1 As shown, in this embodiment, the mounting bracket 3 is fixed above the base 1 and has a mounting groove 31 on one side. The opening of the mounting groove 31 faces the positioning clamp 2, and the main body of the mounting groove 31 is trapezoidal to expand the area of the opening of the mounting groove 31 to the outside.
[0014] Furthermore, such as Figure 1 As shown, the movable clamping assembly 100 in this embodiment includes a movable base 101, a linear guide slider mechanism 110, a lifting mechanism 120, and a movable pressing mechanism 130. The movable base 101 is at least partially movably disposed within the mounting groove 31. Multiple linear guide slider mechanisms 110 are provided between the mounting frame 3 and the movable base 101. The multiple linear guide slider mechanisms 110 are parallel and non-coplanar, allowing the movable base 101 to slide relative to the mounting frame 3, resulting in greater stability during lifting and sliding. Furthermore, the bottom wall of the movable base 101 has a center seat 102 corresponding to the positioning fixture 2, and the center hole wall of the center seat 102 fits the outer surface of the workpiece. The side and center hole axis are located within the area enclosed by the mounting groove 31, so that the force on the center seat 102 can be applied to the mounting frame 3, avoiding vibration during processing and ensuring processing accuracy and surface quality. The lifting mechanism 120 is connected to the mounting frame 3 and the moving seat 101 respectively, so as to drive the moving seat 101 to move vertically up and down along the axis of the linear guide slider mechanism 110, thereby adjusting the position of the workpiece radially supported in the middle of the center seat 102, so that it can accurately adapt to shaft workpieces of different lengths. The moving clamping mechanism 130 is provided on the moving seat 101 and corresponds to the positioning fixture 2 and cooperates to clamp or release the end of the workpiece.
[0015] Furthermore, such as Figure 1 As shown, in this embodiment, the multiple linear guide slider mechanisms 110 are arranged in an equilateral quadrilateral. Two linear guide slider mechanisms 110 are located near the two inner corners of the mounting groove 31, and two other linear guide slider mechanisms 110 are located on the walls of the mounting frame 3 on both sides of the mounting groove 31, so as to evenly distribute the force on both sides of the moving seat 3. The linear guide slider mechanism 110 includes a guide rail 111 fixed on the mounting frame 3 and multiple sliders 112 fixed on the moving seat 101 and slidingly engaged with the guide rail 111.
[0016] Furthermore, such as Figure 1 , Figure 2As shown, in this embodiment, the top wall of the mounting frame 3 is integrally provided with a mounting part 32 at the mounting groove 31. The lifting mechanism 120 includes a drive component 121, a lead screw 122, a guide block 123, and a bearing seat 124. The drive component 121 is fixed on the mounting part 32. One end of the lead screw 122 passes through the mounting part 32 and is connected to the output shaft of the drive component 121 for transmission. The other end is rotatably connected to the inner wall of the mounting groove 31 through the bearing seat 124. One end of the guide block 123 is fixedly connected to the movable seat 101, and the other end is rotatably engaged with the lead screw 122. In use, the drive component 121 drives the lead screw 122 to rotate and drives the guide block 123 to move vertically up and down along the axis of the lead screw 122, so as to realize the vertical up and down lifting of the movable seat 101.
[0017] Furthermore, such as Figure 1 As shown, the movable clamping mechanism 130 in this embodiment includes a second guide rail 131, a second slider 132, a clamping member 133, and a second driving member 134. The second guide rail 131 is fixedly mounted on the inner wall of the movable seat 101 in a vertical direction. The clamping member 133 is slidably engaged with the second guide rail 131 through the second slider 132. The second driving member 134 is located above the movable seat 101 and its output end passes through the movable seat 101 and is fixedly connected to the clamping member 133 to drive the clamping member 133 to move vertically up and down along the axis of the second guide rail 131, so as to cooperate with the positioning fixture 2 to clamp or release the end of the workpiece.
[0018] Furthermore, such as Figure 1 As shown, this embodiment also includes a transmission assembly 200, which includes a drive component 201 fixed on the base 1 and a belt transmission mechanism. The drive component 201 drives the positioning fixture 2 to rotate through the belt transmission mechanism, thereby driving the workpiece to rotate. This transmission assembly 200 is an existing structure, so it will not be described in detail.
[0019] The above description is merely a preferred embodiment of this utility model and is not intended to limit the 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 principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A machine tool structure having a stable lifting and high machining accuracy, characterized in that, include: A base (1) is provided with at least one positioning clamp (2); Mounting bracket (3), which is fixed above the base (1) and has a mounting groove (31) on one side, with the groove opening facing the positioning clamp (2); A movable clamping assembly (100) includes a movable base (101), a linear guide slider mechanism (110), a lifting mechanism (120), and a movable pressing mechanism (130). The movable base (101) is at least partially movably disposed within the mounting groove (31), and its bottom wall is provided with a center seat (102) corresponding to the positioning fixture (2). The axis of the center hole of the center seat (102) is located within the area enclosed by the mounting groove (31). There are multiple linear guide slider mechanisms (110) and they are disposed on the mounting frame. Between (3) and the movable seat (101), multiple linear guide slider mechanisms (110) are arranged in parallel and non-coplanar manner. The lifting mechanism (120) is connected to the mounting frame (3) and the movable seat (101) respectively to drive the movable seat (101) to move vertically up and down along the axis of the linear guide slider mechanism (110), thereby adjusting the position of the workpiece radially supported in the middle of the center seat (102). The moving pressing mechanism (130) is located on the movable seat (101) and corresponds to the positioning fixture (2) and cooperates to press or release the end of the workpiece.
2. The machine tool structure according to claim 1, wherein: The main body of the mounting groove (31) is trapezoidal, and the multiple linear guide slider mechanisms (110) are arranged in an equilateral quadrilateral. Two linear guide slider mechanisms (110) are located near the two inner corners of the mounting groove (31), and two other linear guide slider mechanisms (110) are located on the wall of the mounting frame (3) on both sides of the mounting groove (31).
3. The machine tool structure according to claim 1 or 2, wherein: The linear guide slider mechanism (110) includes a guide rail (111) fixed on the mounting frame (3) and a plurality of sliders (112) fixed on the movable seat (101) and slidingly engaged with the guide rail (111).
4. The machine tool structure according to claim 1, wherein: The top wall of the mounting bracket (3) is integrally provided with a mounting part (32) inward at the mounting groove (31). The lifting mechanism (120) includes a drive component (121), a lead screw (122), a guide block (123), and a bearing seat (124). The drive component (121) is fixed on the mounting part (32). One end of the lead screw (122) passes through the mounting part (32) and is connected to the output shaft of the drive component (121) for transmission. The other end is rotatably connected to the inner wall of the mounting groove (31) through the bearing seat (124). One end of the guide block (123) is fixedly connected to the moving seat (101), and the other end is rotatably engaged with the lead screw (122).
5. The machine tool structure according to claim 1, wherein: The movable pressing mechanism (130) includes a second guide rail (131), a second slider (132), a pressing member (133), and a second driving member (134). The second guide rail (131) is fixedly mounted on the inner wall of the movable seat (101) in the vertical direction. The pressing member (133) is slidably engaged with the second guide rail (131) through the second slider (132). The second driving member (134) is located above the movable seat (101) and its output end passes through the movable seat (101) and is fixedly connected to the pressing member (133) to drive the pressing member (133) to move vertically up and down along the axis of the second guide rail (131).
6. The machine tool structure according to claim 1, wherein: It also includes a transmission assembly (200), which includes a drive component three (201) fixed on the base (1) and a belt drive mechanism. The drive component three (201) drives the positioning fixture (2) to rotate through the belt drive mechanism.