Ram driving system of floor type boring and milling machine

Abstract

The utility model discloses a ram driving system of a floor type boring and milling machine, which comprises a ram seat, a ram, a spindle and a speed change mechanism, a spindle telescopic mechanism comprises a tailstock, a telescopic driving motor, a telescopic lead screw nut and a push rod, and a Z-axis driving mechanism comprises a Z-axis lead screw nut, a planetary gear speed reducer and a Z-axis driving motor. The speed change mechanism is arranged on the ram seat on the left side of the ram and comprises a main shaft driving motor, a gear box and a speed-changing gear box; the speed change mechanism is arranged on the ram driving system, the spindle driving motor is matched with the ZF or BF gearbox to be directly connected with the input end of the gearbox, the gearbox is of a double-speed structure, the requirement for high-speed operation of a machine tool spindle can be met according to the speed ratio of 1: 1, a high rotating speed is output to cut flexible materials, torque can be increased through speed reduction, and the machining efficiency is improved. The requirement for low-speed large-torque output of the machine tool spindle is met, hard materials are machined, the manufacturing period is short, and quality is reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tools, in particular to a ram drive system of a floor-standing boring and milling machine. Background Art

[0002] Floor-type boring and milling machines are heavy-duty metal cutting machines with a wide range of uses. Due to their large three-coordinate working range, good machine rigidity, and powerful configuration, they can perform both boring and milling processes with high machining accuracy. They are suitable for machining parts with large shapes and weights, and complex shapes and machining surfaces, and can complete multiple machining processes in one clamping.

[0003] The spindle transmission mechanism in most existing milling machines is usually directly connected to the motor or connected by a synchronous belt drive at high speed. This often leads to a limited spindle speed range and chip torque range. If the spindle needs to tap at low speed and high torque, the workpiece is usually transferred to another processing equipment. The re-clamping and repositioning of the workpiece will not only cause large positional tolerances in certain processing features of the workpiece, which does not meet the high-precision processing requirements, but may also scratch the workpiece during transfer.

[0004] Therefore, existing milling machines have the technical problem of being unable to switch between low-speed, high-torque and high-speed finishing. Especially for machining centers, using a single spindle transmission mechanism such as low-speed, high-torque or high-speed finishing not only has the disadvantage of high cost, but also takes up a lot of space. Summary of the Invention

[0005] In order to solve the above problems, the utility model provides a floor-type boring and milling machine slide drive system that can switch speeds in different usage scenarios.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical solution: a slide drive system of a floor-standing boring and milling machine, including a slide seat, a slide, a spindle, and a speed change mechanism. The slide is installed on the slide seat, the spindle is arranged inside the slide housing, and the spindle is movably connected to the slide through a connecting sleeve. A milling cutter mounting seat is installed at the bottom of the spindle, a spindle telescopic mechanism is provided at the top, and a Z-axis drive mechanism is provided on the right side.

[0007] The main shaft telescopic mechanism includes a car tail, a telescopic drive motor, a telescopic screw nut and a push rod. An installation cavity is opened in the car tail, which is installed on the top of the slide, and its bottom is opposite to the top of the main shaft. The telescopic drive motor is installed on one side of the upper tail body of the car tail, and its transmission shaft faces the top side of the car tail, and a small pulley is installed on the transmission shaft. The telescopic screw nut is installed in the car tail, and the motor connecting end of the screw passes through the top of the car tail frame. A large pulley is installed on the motor connecting end of the screw, and the large pulley is connected to the small pulley on the telescopic drive motor through a transmission belt. The number of the push rods is two, which are arranged in the car tail, and one end of each is connected to the bottom surface of the nut seat of the telescopic screw nut, and the two push rods are arranged opposite to each other, and the other end is connected to the top of the main shaft, and the two are connected by a bearing overfit.

[0008] The Z-axis drive mechanism includes a Z-axis screw nut, a planetary gear reducer and a Z-axis drive motor. The Z-axis screw nut is arranged on the slide seat on the right side of the slide and is connected to the slide seat through the mounting seat. Its nut seat is connected to the right side of the slide. The planetary gear reducer is connected to the motor connection end of the Z-axis screw nut. The Z-axis drive motor is arranged above the planetary gear reducer and is transmission-connected to it.

[0009] The speed changing mechanism is arranged on the ram seat on the left side of the ram, and the speed changing mechanism includes a main shaft drive motor, a gear box and a gear transmission. The various components are respectively connected to the ram seat. The output end of the main shaft drive motor is in the same vertical direction as the main shaft, and is associated with the input end of the gear box arranged below it. The gear box is a BF or ZF reduction box. The output end of the gear box is also in the same vertical direction as the main shaft, and is associated with the input end of the transmission arranged below it. The output end of the transmission is connected to the main shaft in the ram.

[0010] The gearbox includes a housing, gear No. 1, gear No. 2, gear No. 3 and gear No. 4. The gear No. 1 is installed outside the input shaft of the gearbox. The gear No. 2 is arranged on the right side of the gear No. 1 and meshes with the gear No. 1. The center column is connected to the housing of the gearbox through a bearing. The gear No. 3 is arranged on the right side of the gear No. 2 and meshes with the gear No. 2. The center column is also connected to the housing of the gearbox through a bearing. The gear No. 4 is outside the gearbox and on the right side of the gear No. 3. The gear No. 4 is installed on the main shaft and meshes with the gear No. 3.

[0011] Furthermore, the number of teeth and module of the No. 1 gear is 35×5, the number of teeth and module of the No. 2 gear is 25×5, the number of teeth and module of the No. 3 gear is 25×5, and the number of teeth and module of the No. 4 gear is 47×5.

[0012] Furthermore, the center distance between the No. 1 gear and the No. 2 gear is 150 mm, the center distance between the No. 2 gear and the No. 3 gear is 125 mm, and the center distance between the No. 3 gear and the No. 4 gear is 180 mm.

[0013] Beneficial effects: ①. The utility model sets a speed change mechanism on the slide drive system, and the spindle drive motor is directly connected to the input end of the gearbox with a ZF or BF gearbox. It is transmitted through the gear wheels in the gearbox, and the gear reduction ratio is used to reduce the speed and output a relatively large torque. It is connected to the No. 4 gear head on the spindle, so that the spindle obtains a larger cutting torque. The gearbox adopts a dual-speed structure, which can meet the requirements of high-speed operation of the machine tool spindle with a speed ratio of 1:1 and output high speed to cut flexible materials. It can also increase the torque by deceleration, meeting the requirements of low-speed and high-torque output of the machine tool spindle, processing hard materials, with a short manufacturing cycle and reliable quality.

[0014] ②. The utility model also has a gear transmission to improve the main shaft transmission efficiency, the gearbox has a strong load-bearing capacity, the gearbox has a compact structure, small size, easy installation, low operating noise, the gear pair transmission process is smooth, the noise is relatively low, which helps to provide a more comfortable working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of the utility model.

[0016] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of AA.

[0017] Figure 3 It is a structural diagram of the speed change mechanism of the utility model.

[0018] In the figure: 1. Slide seat; 2. Slide; 3. Spindle; 4. Car tail; 5. Telescopic drive motor; 6. Telescopic screw nut; 7. Push rod; 8. Z-axis screw nut; 9. Planetary gear reducer; 10. Z-axis drive motor; 11. Spindle drive motor; 12. Gear box; 13. Gear transmission; 14. Gear No. 1; 15. Gear No. 2; 16. Gear No. 3; 17. Gear No. 4. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inward" and "outward" refer to directions toward or away from the geometric center of a specific component, respectively. The accompanying drawings are highly simplified and use non-precise ratios solely for the purpose of conveniently and clearly illustrating the embodiments of the present invention.

[0021] like Figure 1-3 As shown, this embodiment discloses a floor-type boring and milling machine ram drive system for changing the speed of the spindle, specifically including a ram seat 1, a ram 2, a spindle 3, and a speed change mechanism. Figure 1 The ram 2 is installed on the ram seat 1, the spindle 3 is arranged inside the ram 2 shell, the spindle 3 is movably connected to the ram 2 through a connecting sleeve, a milling cutter mounting seat is installed at the bottom of the spindle 3, a spindle 3 telescopic mechanism is provided on the top, and a Z-axis drive mechanism is provided on the right side.

[0022] See also Figure 1 and Figure 2 The main shaft 3 telescopic mechanism includes a car tail 4, a telescopic drive motor 5, a telescopic screw nut 6 and a push rod 7. Figure 2 It can be seen that an installation cavity is provided in the tail car 4, which is installed on the top of the slide 2, and its bottom is opposite to the top of the main shaft 3, the telescopic drive motor 5 is installed on the upper side of the tail body of the tail car 4, and its transmission shaft faces the top side of the tail car 4, and a small pulley is installed on the transmission shaft. The telescopic screw nut 6 is installed in the tail car 4, and the motor connecting end of its screw passes through the top of the tail car 4 frame. A large pulley is installed on the motor connecting end of the screw, and the large pulley is connected to the small pulley on the telescopic drive motor 5 through a transmission belt. There are two push rods 7, which are arranged in the tail car 4, one end of which is connected to the bottom surface of the nut seat of the telescopic screw nut 6, and the two push rods 7 are arranged opposite to each other. The other end is connected to the top of the main shaft 3, and the two are connected by a bearing overfit.

[0023] from Figure 1 It can be seen that the Z-axis drive mechanism includes a Z-axis screw nut 8, a planetary gear reducer 9 and a Z-axis drive motor 10. The Z-axis screw nut 8 is arranged on the slide seat 1 on the right side of the slide 2, and is connected to the slide seat 1 through the mounting seat. Its nut seat is connected to the right side of the slide 2, and the planetary gear reducer 9 is connected to the motor connection end of the Z-axis screw nut 8. The Z-axis drive motor 10 is arranged above the planetary gear reducer 9 and is transmission-connected to it.

[0024] See also Figure 1 and Figure 2The speed change mechanism is arranged on the slide seat 1 on the left side of the slide 2. The speed change mechanism includes a main shaft drive motor 11, a gear box 12 and a gear transmission 13. The various components are connected to the slide seat 1 respectively. The output end of the main shaft drive motor 11 is in the same vertical direction as the main shaft 3, and is associated with the input end of the gear box 12 arranged below it. The gear box 12 is a BF reduction box. The output end of the gear box 12 is also in the same vertical direction as the main shaft 3, and is associated with the input end of the transmission set below it. The output end of the transmission is connected to the main shaft 3 in the slide 2.

[0025] See also Figure 2 and Figure 3 The gearbox includes a housing, a first gear 14, a second gear 15, a third gear 16 and a fourth gear 17. The first gear 14 is mounted outside the input shaft of the gearbox. For specific structure, see Figure 3 The second gear 15 is arranged on the right side of the first gear 14 and meshes with the first gear 14, and its center column is connected to the housing of the transmission through a bearing. The third gear 16 is arranged on the right side of the second gear 15 and meshes with the second gear 15, and its center column is also connected to the housing of the transmission through a bearing. The fourth gear 17 is outside the transmission and on the right side of the third gear 16. The fourth gear 17 is installed on the main shaft 3 and meshes with the third gear 16.

[0026] The number of teeth and module of the first gear 14 are 35×5, the number of teeth and module of the second gear 15 are 25×5, the number of teeth and module of the third gear 16 are 25×5, and the number of teeth and module of the fourth gear 17 are 47×5.

[0027] The center distance between the first gear 14 and the second gear 15 is 150 mm, the center distance between the second gear 15 and the third gear 16 is 125 mm, and the center distance between the third gear 16 and the fourth gear 17 is 180 mm.

[0028] During use, the spindle 3 is driven by the spindle 3 drive motor input and then shifted through the BF gearbox 12 and the gear transmission 13 for output. When the No. 1 gear 14, the No. 2 gear 15, the No. 3 gear 16 and the No. 4 gear 17 are relatively fixed, there is no relative motion in the meshing between the gears, and the gears are noiseless. At this time, the speed ratio of the gear shift mechanism is 1:1, which meets the high-speed operation requirement of the machine tool spindle 3. When the No. 1 gear 14, the No. 2 gear 15, the No. 3 gear 16 and the No. 4 gear 17 form a planetary gear reduction gear train, the torque is increased by deceleration, which meets the low-speed and high-torque output requirement of the machine tool spindle 3.

[0029] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A ram drive system for a floor-type boring and milling machine, comprising a ram seat (1), a ram (2), a spindle (3), and a speed change mechanism, wherein the ram (2) is mounted on the ram seat (1), the spindle (3) is arranged inside the ram (2) housing, the spindle (3) is movably connected to the ram (2) through a connecting sleeve, a milling cutter mounting seat is mounted on the bottom of the spindle (3), a spindle (3) telescopic mechanism is provided on the top, and a Z-axis drive mechanism is provided on the right side; the characteristics are as follows: The main shaft (3) telescopic mechanism includes a car tail (4), a telescopic drive motor (5), a telescopic screw nut (6) and a push rod (7). A mounting cavity is provided in the car tail (4), which is mounted on the top of the ram (2), and its bottom is opposite to the top of the main shaft (3). The telescopic drive motor (5) is mounted on the upper side of the tail body of the car tail (4), and its transmission shaft faces the top side of the car tail (4). A small pulley is installed on the transmission shaft. The telescopic screw nut (6) is mounted on the car tail (4). The motor connection end of the screw rod passes through the top of the tail (4) frame, and a large pulley is installed on the motor connection end of the screw rod. The large pulley is connected to the small pulley on the telescopic drive motor (5) through a transmission belt. There are two push rods (7) arranged in the tail (4), one end of which is connected to the bottom surface of the nut seat of the telescopic screw rod nut (6), and the two push rods (7) are arranged relative to each other, and the other end is connected to the top of the main shaft (3). The two are connected by an overfitting bearing. The Z-axis drive mechanism includes a Z-axis screw nut (8), a planetary gear reducer (9) and a Z-axis drive motor (10), wherein the Z-axis screw nut (8) is arranged on the right side of the ram (2) and is connected to the ram seat (1) through a mounting seat, and its nut seat is connected to the right side of the ram (2), the planetary gear reducer (9) is connected to the motor connection end of the Z-axis screw nut (8), and the Z-axis drive motor (10) is arranged above the planetary gear reducer (9) and is in transmission connection with the planetary gear reducer (9); The speed change mechanism is arranged on the ram seat (1) on the left side of the ram (2), and the speed change mechanism includes a main shaft drive motor (11), a gear box (12) and a gear transmission (13), and each component is connected to the ram seat (1), and the output end of the main shaft drive motor (11) is in the same vertical direction as the main shaft (3) and is associated with the input end of the gear box (12) arranged below it. The gear box (12) is a BF or ZF reduction box. The output end of the gear box (12) is also in the same vertical direction as the main shaft (3) and is associated with the input end of the transmission case arranged below it. The output end of the transmission case is connected to the main shaft (3) in the ram (2). The gearbox comprises a housing, a first gear (14), a second gear (15), a third gear (16) and a fourth gear (17), wherein the first gear (14) is mounted outside the input shaft of the gearbox, the second gear (15) is arranged on the right side of the first gear (14) and meshed with the first gear (14), and its center column is connected to the housing of the gearbox through a bearing, the third gear (16) is arranged on the right side of the second gear (15) and meshed with the second gear (15), and its center column is also connected to the housing of the gearbox through a bearing, the fourth gear (17) is outside the gearbox and on the right side of the third gear (16), and the fourth gear (17) is mounted on the main shaft (3) and meshed with the third gear (16).

2. The ram drive system of a floor-type boring and milling machine according to claim 1, characterized in that: The number of teeth and module of the No. 1 gear (14) is 35×5, the number of teeth and module of the No. 2 gear (15) is 25×5, the number of teeth and module of the No. 3 gear (16) is 25×5, and the number of teeth and module of the No. 4 gear (17) is 47×5.

3. The ram drive system of a floor-type boring and milling machine according to claim 1 or 2, characterized in that: The center distance between the first gear (14) and the second gear (15) is 150 mm, the center distance between the second gear (15) and the third gear (16) is 125 mm, and the center distance between the third gear (16) and the fourth gear (17) is 180 mm.

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