Numerically controlled vertical knee-type milling machine

Abstract

This utility model discloses a CNC vertical milling machine with a lifting table, including a machine base, a movable platform, a multi-angle drilling and milling mechanism, and a lifting mechanism. The lifting mechanism includes a lifting component and a guide bearing assembly. The guide bearing assembly includes a guide column, a ball sleeve, and a ball guide bushing. The ball sleeve is fixed to the outer wall of the guide column, and the ball guide bushing is disposed outside the ball sleeve. The design proposed in this utility model uses the lifting and guiding cooperation of the ball sleeve and the ball guide bushing to replace the traditional smooth rod guide structure, transforming traditional sliding friction into rolling friction. This design significantly reduces the coefficient of friction, making the movement smoother and reducing vibration and crawling phenomena. Secondly, the design of the ball sleeve allows the steel ball to make surface contact with the ball guide bushing, which can better withstand radial and axial combined loads, suppress overturning moment during the lifting process, avoid local stress concentration, and reduce shaking caused by off-center loading.

Description

Technical Field

[0001] This utility model belongs to the field of milling machine technology, specifically a CNC vertical lifting table milling machine. Background Technology

[0002] Milling machines include horizontal milling machines and vertical milling machines. The main difference between vertical and horizontal milling machines is that the spindle is arranged vertically. In addition to the different spindle arrangement, the worktable can be raised and lowered. The milling cutters used in vertical milling machines are more flexible and have a wider range of applications.

[0003] A vertical milling machine lifting device is currently disclosed in patent application number "CN222588783U". It includes a base and a positioning platform mounted on top of the base. This utility model relates to the technical field of lifting devices. This vertical milling machine lifting device uses a drive motor to drive a lifting screw, thereby allowing the lifting slider to move up and down. With the connection of a connecting frame, it can complete the lifting and lowering of the lifting platform. Furthermore, the cooperation of four limit rods ensures greater stability of the lifting platform during the lifting and lowering process.

[0004] The above-mentioned four sets of limit rod assemblies are used to realize the auxiliary lifting and guiding function of the lifting platform. In actual use, it was found that since the force direction of the vertical milling machine is vertically downward, when the moving platform moves along the X / Y axis, the deflected position is the main force point. After long-term use, due to the uneven force on the four sides, the limit rods are prone to shaking and crawling. There is still room for improvement. Utility Model Content

[0005] The purpose of this utility model is to provide a CNC vertical lifting table milling machine in order to solve the problems mentioned above.

[0006] The technical solution adopted by this utility model is as follows: A CNC vertical milling machine with lifting table includes a machine base, a movable platform, a multi-angle drilling and milling mechanism, and a lifting mechanism. The lifting mechanism includes a lifting component and a guide bearing assembly. The guide bearing assembly includes a guide column, a ball sleeve, and a ball guide bushing. The ball sleeve is fixed to the outer wall of the guide column, and the ball guide bushing is disposed outside the ball sleeve. The ball sleeve can move vertically relative to the ball guide bushing. The bottom of the ball guide bushing and the top of the guide column are fixedly connected to the machine base and the movable platform, respectively. The guide column can move up and down synchronously with the movable platform.

[0007] In a preferred embodiment, the guide bearing assembly comprises at least two sets.

[0008] In a preferred embodiment, the lifting component is a hydraulic lifting cylinder, and the fixed end and the lifting end of the hydraulic lifting cylinder are fixedly connected to the machine base and the movable platform, respectively.

[0009] In a preferred embodiment, the multi-angle drilling and milling mechanism includes a horizontal rotary drive, the fixed end of which is mounted on the top of the movable platform, and the movable end of which is fixedly connected to a crossbeam.

[0010] In a preferred embodiment, a longitudinal rotary drive is installed at one end of the crossbeam facing the movable platform, and the rotating end of the longitudinal rotary drive is provided with an organic head.

[0011] In a preferred embodiment, a gearbox is provided on the top of the machine head, the input end of the gearbox is connected to a second motor, and the output end of the gearbox is connected to a drill chuck on the machine head.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1. In this utility model, the lifting and guiding cooperation of ball sleeve and ball guide sleeve is used to replace the traditional smooth rod guiding structure, which transforms the traditional sliding friction into rolling friction, significantly reducing the friction coefficient, making the movement smoother, and reducing shaking and crawling phenomena. Secondly, the design of the ball sleeve makes the steel ball and the ball guide sleeve have surface contact, which can better withstand radial and axial combined loads, suppress the overturning moment during the lifting process, avoid local stress concentration, reduce shaking caused by off-center load, and also reduce the load impact on the lifting component, and also ensure the service life of the lifting component. 2. In this utility model, a rotary drive is designed on the drill chuck to drive it to rotate in the horizontal and vertical directions. At the same time, in conjunction with the movement of the movable platform itself, drilling and milling operations at multiple angles and positions can be realized, making it applicable to a wider range of scenarios. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the entire utility model; Figure 2 This is a simplified three-dimensional structural diagram of the multi-angle drilling and milling mechanism in this utility model; Figure 3 This is a simplified exploded three-dimensional structural diagram of the guide and support component in this utility model.

[0014] Marked in the image: 100-machine station; 200-Event Platform; 300 - Guide load-bearing assembly, 310 - Guide post, 320 - Ball sleeve, 330 - Ball guide sleeve; 400 - Lifting component; 500 - Multi-angle drilling and milling mechanism, 510 - Second motor, 520 - Horizontal platform, 530 - Horizontal rotary drive, 540 - Longitudinal rotary drive, 550 - Machine head, 560 - Gearbox. Detailed Implementation

[0015] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0016] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional 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] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0018] Reference Figure 1-3 A CNC vertical milling machine with a lifting table includes a machine base 100, a movable platform 200, a multi-angle drilling and milling mechanism 500, and a lifting mechanism. The lifting mechanism includes a lifting component 400 and a guide bearing assembly 300. The guide bearing assembly 300 includes a guide post 310, a ball sleeve 320, and a ball guide bushing 330. The ball sleeve 320 is fixed to the outer wall of the guide post 310, and the ball guide bushing 330 is disposed outside the ball sleeve 320. The ball sleeve 320 can move vertically relative to the ball guide bushing 330. The bottom of the ball guide bushing 330 and the top of the guide post 310 are respectively fixed to the machine base 100 and the movable platform 200. The guide column 310 is fixedly connected and can move up and down synchronously with the movable platform 200. The lifting guide structure of ball sleeve 320 and ball guide sleeve 330 is used instead of the traditional smooth rod guide structure, which can significantly reduce the coefficient of friction, make the movement smoother, and reduce shaking and crawling. Secondly, the design of ball sleeve 320 makes the steel ball and ball guide sleeve 330 have surface contact, which can better withstand radial and axial combined loads, suppress the overturning moment during the lifting process, avoid local stress concentration, reduce swaying caused by off-center load, and also reduce the stress on the lifting component 400 under off-center load, and also ensure the service life of the lifting component 400.

[0019] The movable platform 200 includes a top platform, a moving module (a common structure in existing milling machines, which will not be described in detail here) that can drive the top platform to move along the X-axis and / or Y-axis, and a bottom platform.

[0020] In this embodiment, there are at least two sets of guide bearing components 300. Preferably, there are four sets of guide bearing components 300, which are distributed at the four bottom corners of the bottom platform of the movable platform 200 to ensure the stability of the bearing structure.

[0021] In this embodiment, the lifting component 400 is a hydraulic lifting cylinder. The fixed end and the lifting end of the hydraulic lifting cylinder are fixedly connected to the machine base 100 and the movable platform 200, respectively. The hydraulic lifting cylinder can drive the movable platform 200 to move up and down, thereby realizing the adjustment of the Z-axis direction of the movable platform 200. The machine base 100 also includes a hydraulic system connected to the hydraulic lifting cylinder.

[0022] In this embodiment, the multi-angle drilling and milling mechanism 500 includes a horizontal rotary drive 530. The fixed end of the horizontal rotary drive 530 is installed on the top of the movable platform 200, and the movable end of the horizontal rotary drive 530 is fixedly connected to a crossbeam 520. A longitudinal rotary drive 540 is installed at the end of the crossbeam 520 facing the movable platform 200. The rotating end of the longitudinal rotary drive 540 is provided with an organic head 550. The drilling and milling device is designed with a horizontal rotary drive 530 and a longitudinal rotary drive 540 that can drive it to rotate in the horizontal and vertical directions, which can drive the drilling and milling device to realize rotary drilling and milling operations in the 360° direction. At the same time, in conjunction with the X, Y and Z axis movement of the movable platform 200 itself, multi-angle and multi-position drilling and milling operations can be realized, making it applicable to a wider range of scenarios.

[0023] It should be noted that the rotary drive is a highly integrated full-circumference rotary reduction mechanism that can satisfy both the rotation function and the stress problem of high loads in drilling and milling.

[0024] In this embodiment, a gearbox 560 is provided on the top of the machine head 550. The input end of the gearbox 560 is connected to a second motor 510, and the output end of the gearbox 560 is connected to a drill chuck on the machine head 550. By combining gears of different sizes, different speed ratios can be achieved, thereby enabling the milling machine to flexibly adjust its speed under different working conditions and also increasing the overall torque.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A CNC vertical milling machine with a lifting table, characterized in that, The system includes a machine base, a movable platform, a multi-angle drilling and milling mechanism, and a lifting mechanism. The lifting mechanism includes a lifting component and a guide bearing assembly. The guide bearing assembly includes a guide column, a ball bearing sleeve, and a ball bearing guide sleeve. The ball bearing sleeve is fixed to the outer wall of the guide column, and the ball bearing guide sleeve is disposed outside the ball bearing sleeve. The ball bearing sleeve can move vertically relative to the ball bearing guide sleeve. The bottom of the ball bearing guide sleeve and the top of the guide column are fixedly connected to the machine base and the movable platform, respectively. The guide column can move up and down synchronously with the movable platform.

2. The CNC vertical milling machine with lifting table as described in claim 1, characterized in that: The guide bearing components are at least two sets.

3. The CNC vertical milling machine with lifting table as described in claim 1, characterized in that: The lifting component is a hydraulic lifting cylinder, and the fixed end and the lifting end of the hydraulic lifting cylinder are fixedly connected to the machine base and the movable platform, respectively.

4. The CNC vertical milling machine with lifting table as described in claim 1, characterized in that: The multi-angle drilling and milling mechanism includes a horizontal rotary drive, the fixed end of which is mounted on the top of the movable platform, and the movable end of which is fixedly connected to a crossbeam.

5. The CNC vertical milling machine with lifting table as described in claim 4, characterized in that: A longitudinal rotary drive is installed at one end of the crossbeam facing the movable platform, and an organic head is provided at the rotating end of the longitudinal rotary drive.

6. The CNC vertical milling machine with lifting table as described in claim 5, characterized in that: A gearbox is provided on the top of the machine head. The input end of the gearbox is connected to a second motor, and the output end of the gearbox is connected to a drill chuck on the machine head.

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