阅读说明：本技术 一种无级高速摇臂钻床主轴箱 (spindle box of stepless high-speed radial drilling machine ) 是由 张景龙 李宝成 韩贝贝 于 2019-09-20 设计创作，主要内容包括：一种无级高速摇臂钻床主轴箱,在变速箱左上部设置无级调速电机,在无级调速电机的输出轴上设置第八齿轮,在变速箱中部设置第二传动轴,在第二传动轴上设置第一齿轮,第八齿轮与第一齿轮啮合,在第二传动轴中部设置第七齿轮,在第二传动轴中部设置第六齿轮,在第二传动轴下端设置拉杆、变速油缸,在变速箱中部设置第一传动轴,第二齿轮与第七齿轮啮合,在进给伺服电机的输出轴上设置第十齿轮,在变速箱右部设置第三传动轴。该发明主变速及进给变速均为无级调速,可使加工时选择最佳切削速度,即保证加工质量好,又提高加工速度,主变速及进给变速均可不停车变速,缩短加工时的辅助时间,提高生产效率,使运输更方便,应用于机械加工行业中。(a spindle box of a stepless high-speed radial drilling machine is characterized in that a stepless speed regulating motor is arranged on the upper left portion of a transmission box, an eighth gear is arranged on an output shaft of the stepless speed regulating motor, a second transmission shaft is arranged in the middle of the transmission box, a first gear is arranged on the second transmission shaft, the eighth gear is meshed with the first gear, a seventh gear is arranged in the middle of the second transmission shaft, a sixth gear is arranged in the middle of the second transmission shaft, a pull rod and a speed change oil cylinder are arranged at the lower end of the second transmission shaft, a first transmission shaft is arranged in the middle of the transmission box, the second gear is meshed with the seventh gear, a tenth gear is arranged on an output shaft of a feeding servo motor, and a third transmission. The main speed change and the feeding speed change are both stepless speed regulation, so that the optimal cutting speed can be selected during processing, the processing quality is ensured, the processing speed is improved, the main speed change and the feeding speed change can be changed without stopping, the auxiliary time during processing is shortened, the production efficiency is improved, the transportation is more convenient, and the method is applied to the mechanical processing industry.)

1. the utility model provides a stepless high-speed radial drill headstock, includes stepless speed regulation motor, first gear, second gear, third gear, fourth gear, spline housing, fifth gear, first transmission shaft, change speed cylinder, pull rod, second transmission shaft, sixth gear, seventh gear, eighth gear, feeds servo motor, ninth gear, tenth gear, third transmission shaft, gearbox, its characterized in that: a stepless speed regulating motor is arranged at the upper left part of the gearbox, an eighth gear is arranged on an output shaft of the stepless speed regulating motor, a second transmission shaft is arranged at the middle part of the gearbox, a first gear is arranged on the second transmission shaft, the eighth gear is meshed with the first gear, a seventh gear is arranged at the middle part of the second transmission shaft, a sixth gear is arranged at the middle part of the second transmission shaft, a pull rod and a speed changing oil cylinder are arranged at the lower end of the second transmission shaft, the first transmission shaft is arranged at the middle part of the gearbox, a third gear is arranged at the upper part of the first transmission shaft, the second gear is meshed with the seventh gear, a fifth gear is arranged at the upper part of the first transmission shaft, the fifth gear is meshed with the sixth gear, a spline sleeve is arranged at the middle part of the gearbox, a fourth gear is arranged on the spline sleeve, and a tenth gear is arranged on an output shaft of the feeding servo motor, a third transmission shaft is arranged at the right part of the gearbox, a ninth gear is arranged on the third transmission shaft, and the ninth gear is meshed with the tenth gear.

2. The spindle box of the stepless high-speed radial drilling machine according to claim 1, characterized in that: the speed change principle of the spindle box of the stepless high-speed radial drilling machine is as follows:

(1) principle of main gear change

The main speed-changing system is a stepless speed-regulating system, and the power source of the main speed-changing system is a stepless speed-regulating motor, and the revolution of the stepless speed-regulating motor is transmitted to the main shaft through the mechanical transmission system, so that the main shaft also obtains the stepless revolution; a speed reduction transmission mechanism is arranged between the stepless speed regulation motor and the main shaft, firstly, the speed reduction transmission mechanism is used for improving the output torque of the main shaft, and secondly, the revolution of the stepless speed regulation motor is reasonably utilized; in order to better adapt to the requirements of a machining process and expand the revolution range of the main shaft, a high-speed gear and a low-speed gear are arranged in a main transmission system; the revolution range of the stepless speed regulating motor is 302r/min-4440r/min, and the main shaft obtains a stepless speed regulating range of 16r/min-1600r/min through the speed reduction transmission of a transmission system; if the high-speed gear is not adopted, the main shaft can only obtain the range of the revolution of 16r/min-235r/min, and if the high-speed gear is adopted, the main shaft 20 can also obtain the range of the revolution of 235r/min-1600 r/min; the two ranges of the revolution are added to enable the spindle to obtain a range of the revolution of 16r/min-1600r/min, so that the requirement of the machining process on the revolution of the spindle can be met; the high-low gear conversion is realized through a speed-changing oil cylinder, and when a pull rod in the speed-changing oil cylinder moves downwards, a sixth gear is pulled to be meshed with a fifth gear, so that the main shaft obtains the revolution within a low-speed range; when the pull rod moves upwards, the sixth gear is pulled to be meshed with the internal tooth part of the seventh gear, and the motion is transmitted to the main shaft through the seventh gear, the second gear, the third gear and the fourth gear, so that the main shaft obtains the revolution within a high-speed range;

(2) feed speed change principle

The feeding speed change system does not need to expand the range of the revolution, firstly, the reduction ratio of the feeding transmission system is large enough, so that the feeding force of the main shaft can meet the processing requirement, secondly, the feeding amount of the mechanical processing is small, so the range of the feeding amount does not need to be large, and the range of the feeding amount does not need to be expanded from the feeding servo motor to the main shaft; stepless speed regulation range of the feeding servo motor: 2r/min-2500r/min, and the main shaft obtains a feed amount of 0.04mm/r-0.94mm/r through a feed transmission system; therefore, the requirement of the machining process on the feeding amount of the main shaft can be met.

3. the spindle box of the stepless high-speed radial drilling machine according to claim 1, characterized in that: the principle of the electrical control system of the spindle box of the stepless high-speed radial drilling machine is as follows:

The main speed change and the feeding speed change are mainly controlled electrically, the stepless speed regulating motor is an alternating current variable frequency stepless speed regulating motor, and the frequency of the stepless speed regulating motor is changed through a frequency converter, so that the change of the rotating speed of the main shaft is realized; the feeding motor is a feeding servo motor, and the rotating speed of the feeding servo motor is changed through a servo system to realize feeding speed change; the main speed change has two speed ranges of high and low gears, so that the main speed change is not realized only by the speed change of a stepless speed regulating motor, but also needs mechanical cooperation, the direction of pressure oil supply is controlled by an electromagnetic directional valve, and a low-speed transmission route or a high-speed transmission route is switched on; the main speed change and the feeding speed change are two independent speed change systems without connection, and belong to a sub-feeding system; in order to realize the feeding system, the operation habit of an operator is more met, the machine tool works more safely, the two systems can be linked through software, the feeding is changed into feeding, namely the main shaft 20 rotates one turn, and the feeding is operated according to a certain amount; the feed amount of each revolution of a main shaft 20 of a main shaft box of the stepless high-speed radial drilling machine can be adjusted within the range of 0.04mm/r-0.94mm/r, so that the requirement of mechanical processing is met; the main shaft speed change and feeding speed change operations are very simple and convenient, a control panel is arranged in front of a main shaft box, a digital display window is arranged on the control panel, the number of revolutions (r/min) of the main shaft can be displayed by numbers, the feeding amount (mm/r) can be displayed by numbers, and if the number of revolutions or the feeding amount of the main shaft is changed, only a speed regulating knob needs to be rotated; the main spindle box of the stepless high-speed radial drilling machine can be operated under the condition of no stopping no matter whether the main speed change or the feeding speed change is realized; when the main speed change is carried out at high and low speed gear shifting, the main shaft automatically changes to low-speed rotation, and after the main shaft is shifted, the main shaft automatically needs a new revolution.

4. The spindle box of the stepless high-speed radial drilling machine according to claim 1, characterized in that: the system transmission route of the spindle box of the stepless high-speed radial drilling machine is as follows:

(1) The low-gear transmission route of the main transmission system comprises the following steps: the stepless speed regulating motor, the eighth gear, the first gear, the sixth gear, the fifth gear, the third gear, the fourth gear and the main shaft;

(2) The main transmission system high-speed gear transmission route: the stepless speed regulating motor, the eighth gear, the first gear, the seventh gear, the second gear, the third gear, the fourth gear and the main shaft;

(3) a feeding transmission system: the system has only one transmission route, namely: a feeding servo motor, a tenth gear, a ninth gear, a worm gear, a horizontal shaft, a spindle sleeve and a spindle.

Technical Field

the invention relates to a spindle box of a stepless high-speed radial drilling machine in the machining industry.

background

At present, a radial drilling machine is a machine tool for machining holes with a plurality of large parts by single piece or batch production in the machining industry. A drill press is provided in which a spindle head is movable on a swing arm and revolves around a column with the swing arm. The rocker arm moves up and down along the upright column to adapt to processing workpieces with different heights. The smaller workpiece is mounted on the table and the larger workpiece is placed directly on the machine base or ground. Radial drilling machines are widely used in single-piece and medium-to-small-lot production to machine holes in workpieces of relatively large volumes and weights. The main variants of radial drilling machines are sliding seat type and universal type. The slide seat type radial drilling machine is formed by changing a base of a base type radial drilling machine into a slide seat, and the slide seat moves along a guide rail of a machine body so as to enlarge the processing range. The rocker arm of the universal rocker arm drilling machine does vertical and rotary motion and does horizontal movement, and the main spindle box does inclination adjustment on the rocker arm so as to adapt to the processing of all parts of a workpiece. In addition, there are car, wall and numerically controlled radial drills and the like. The radial drilling machine is a hole processing device and is used for processing various forms such as drilling, reaming, tapping, end face scraping and the like. According to usage and structure classification, the drilling machine is divided into an upright drilling machine, a bench drilling machine, a multi-hole drilling machine, a radial drilling machine and other special drilling machines and the like. Among various drilling machines, the radial drilling machine is convenient and flexible to operate, wide in application range and typical, is particularly suitable for hole machining of porous large parts in single piece or batch production, and is a common machine tool in common machining workshops.

The spindle speed change and spindle feed speed change of a digital type radial drilling machine disclosed in patent No. 201510820147.X are realized by an electromagnetic clutch. Due to the limitation of the quality of the domestic electromagnetic clutch, the main spindle box of the rocker drill is high in failure rate, and the transmission strength, the rigidity and the transmission precision are not ideal. Electromagnetic clutches produced in China are short in service life, the electromagnetic clutches need to be replaced frequently through the spindle box, time and labor are wasted, and troubles are brought to users. The problem of complaint can be solved by selecting a high-quality imported clutch, but the price of the imported electromagnetic clutch is extremely high and almost accounts for 50% of the manufacturing cost of the spindle box, so that the manufacturing cost of the rocker drill is high, the rocker drill is difficult to accept by users, and the market prospect is not good. Therefore, the development of a low-cost stepless high-speed radial drilling machine spindle box with stable quality is a new problem to be solved urgently.

Disclosure of Invention

The invention aims to provide a main spindle box of a stepless high-speed radial drilling machine, wherein a stepless speed regulating motor transmits the rotation of the motor to a main spindle through a gear and a transmission shaft, so that the main spindle obtains any rotating speed within the rotating speed range, thereby meeting the cutting speed of various materials.

The purpose of the invention is realized as follows: a spindle box of a stepless high-speed radial drilling machine comprises a stepless speed regulating motor, a first gear, a second gear, a third gear, a fourth gear, a spline sleeve, a fifth gear, a first transmission shaft, a speed changing oil cylinder, a pull rod, a second transmission shaft, a sixth gear, a seventh gear, an eighth gear, a feeding servo motor, a ninth gear, a tenth gear, a third transmission shaft and a gearbox, wherein the stepless speed regulating motor is arranged at the upper left part of the gearbox, the eighth gear is arranged on an output shaft of the stepless speed regulating motor, the second transmission shaft is arranged in the middle of the gearbox, the first gear is arranged on the second transmission shaft, the eighth gear is meshed with the first gear, the seventh gear is arranged in the middle of the second transmission shaft, the sixth gear is arranged in the middle of the second transmission shaft, the pull rod and the speed changing oil cylinder are arranged at the lower end of the second transmission shaft, the first transmission shaft is arranged in the middle of the gearbox, the third gear, the upper part of the first transmission shaft is provided with a second gear, the second gear is meshed with a seventh gear, the upper part of the first transmission shaft is provided with a fifth gear, the fifth gear is meshed with a sixth gear, the middle part of the gearbox is provided with a spline sleeve, the spline sleeve is provided with a fourth gear, the fourth gear is meshed with a third gear, the upper right part of the gearbox is provided with a feeding servo motor, an output shaft of the feeding servo motor is provided with a tenth gear, the right part of the gearbox is provided with a third transmission shaft, the third transmission shaft is provided with a ninth gear, and the ninth gear is meshed with the tenth gear;

the speed change principle of the spindle box of the stepless high-speed radial drilling machine is as follows:

(1) Principle of main gear change

The main speed-changing system is a stepless speed-regulating system, and the power source of the main speed-changing system is a stepless speed-regulating motor, and the revolution of the stepless speed-regulating motor is transmitted to the main shaft through the mechanical transmission system, so that the main shaft also obtains the stepless revolution; a speed reduction transmission mechanism is arranged between the stepless speed regulation motor and the main shaft, firstly, the speed reduction transmission mechanism is used for improving the output torque of the main shaft, and secondly, the revolution of the stepless speed regulation motor is reasonably utilized; in order to better adapt to the requirements of a machining process and expand the revolution range of the main shaft, a high-speed gear and a low-speed gear are arranged in a main transmission system; the revolution range of the stepless speed regulating motor is 302r/min-4440r/min, and the main shaft obtains a stepless speed regulating range of 16r/min-1600r/min through the speed reduction transmission of a transmission system; if the high-speed gear is not adopted, the main shaft can only obtain the range of the revolution of 16r/min-235r/min, and if the high-speed gear is adopted, the main shaft 20 can also obtain the range of the revolution of 235r/min-1600 r/min; the two ranges of the revolution are added to enable the spindle to obtain a range of the revolution of 16r/min-1600r/min, so that the requirement of the machining process on the revolution of the spindle can be met; the high-low gear conversion is realized through a speed-changing oil cylinder, and when a pull rod in the speed-changing oil cylinder moves downwards, a sixth gear is pulled to be meshed with a fifth gear, so that the main shaft obtains the revolution within a low-speed range; when the pull rod moves upwards, the sixth gear is pulled to be meshed with the internal tooth part of the seventh gear, and the motion is transmitted to the main shaft through the seventh gear, the second gear, the third gear and the fourth gear, so that the main shaft obtains the revolution within a high-speed range;

(2) Feed speed change principle

The feeding speed change system does not need to expand the range of the revolution, firstly, the reduction ratio of the feeding transmission system is large enough, so that the feeding force of the main shaft can meet the processing requirement, secondly, the feeding amount of the mechanical processing is small, so the range of the feeding amount does not need to be large, and the range of the feeding amount does not need to be expanded from the feeding servo motor to the main shaft; stepless speed regulation range of the feeding servo motor: 2r/min-2500r/min, and the main shaft obtains a feed amount of 0.04mm/r-0.94mm/r through a feed transmission system; therefore, the requirement of the machining process on the feeding amount of the main shaft can be met;

The principle of the electrical control system of the spindle box of the stepless high-speed radial drilling machine is as follows:

The main speed change and the feeding speed change are mainly controlled electrically, the stepless speed regulating motor is an alternating current variable frequency stepless speed regulating motor, and the frequency of the stepless speed regulating motor is changed through a frequency converter, so that the change of the rotating speed of the main shaft is realized; the feeding motor is a feeding servo motor, and the rotating speed of the feeding servo motor is changed through a servo system to realize feeding speed change; the main speed change has two speed ranges of high and low gears, so that the main speed change is not realized only by the speed change of a stepless speed regulating motor, but also needs mechanical cooperation, the direction of pressure oil supply is controlled by an electromagnetic directional valve, and a low-speed transmission route or a high-speed transmission route is switched on; the main speed change and the feeding speed change are two independent speed change systems without connection, and belong to a sub-feeding system; in order to realize the feeding system, the operation habit of an operator is more met, the machine tool works more safely, the two systems can be linked through software, the feeding is changed into feeding, namely the main shaft 20 rotates one turn, and the feeding is operated according to a certain amount; the feed amount of each revolution of a main shaft 20 of a main shaft box of the stepless high-speed radial drilling machine can be adjusted within the range of 0.04mm/r-0.94mm/r, so that the requirement of mechanical processing is met; the main shaft speed change and feeding speed change operations are very simple and convenient, a control panel is arranged in front of a main shaft box, a digital display window is arranged on the control panel, the number of revolutions (r/min) of the main shaft can be displayed by numbers, the feeding amount (mm/r) can be displayed by numbers, and if the number of revolutions or the feeding amount of the main shaft is changed, only a speed regulating knob needs to be rotated; the main spindle box of the stepless high-speed radial drilling machine can be operated under the condition of no stopping no matter whether the main speed change or the feeding speed change is realized; when the main speed change is carried out at high and low speed gear shifting, the main shaft automatically changes into low-speed rotation, and after the main speed change is carried out, the main shaft automatically needs a new revolution;

the system transmission route of the spindle box of the stepless high-speed radial drilling machine is as follows:

(1) The low-gear transmission route of the main transmission system comprises the following steps: the stepless speed regulating motor, the eighth gear, the first gear, the sixth gear, the fifth gear, the third gear, the fourth gear and the main shaft;

(2) The main transmission system high-speed gear transmission route: the stepless speed regulating motor, the eighth gear, the first gear, the seventh gear, the second gear, the third gear, the fourth gear and the main shaft;

(3) A feeding transmission system: the system has only one transmission route, namely: a feeding servo motor, a tenth gear, a ninth gear, a worm gear, a horizontal shaft, a spindle sleeve and a spindle.

the key point of the invention lies in its structure and speed-changing principle.

compared with the prior art, the main speed change and the feeding speed change are stepless speed regulation, the optimal cutting speed can be selected during machining, the machining quality is guaranteed to be good, the machining speed is improved, the main speed change and the feeding speed change can be realized without stopping for speed change, the auxiliary time during machining is shortened, the production efficiency is improved, a rotary feeding system can be realized, the trouble of site calculation of an operator and the phenomenon of wrong calculation during the separate feeding system are overcome, the knob operation is adopted during the speed change, the digital display is more convenient and accurate, the system is simple in structure, the number of parts is greatly reduced, materials, the machining time and the assembly time are saved, the maintenance time is saved, the weight of a machine tool is reduced, the transportation is more convenient, and the like, and the spindle box can be widely applied to the machining industry.

The present invention will be described in detail below with reference to the accompanying drawings and examples.

Drawings

fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic diagram of the transmission system of the present invention.

Detailed Description

Referring to the attached drawings, a spindle box of a stepless high-speed radial drilling machine comprises a stepless speed regulating motor 1, a first gear 2, a second gear 3, a third gear 4, a fourth gear 5, a spline housing 6, a fifth gear 7, a first transmission shaft 8, a speed changing oil cylinder 9, a pull rod 10, a second transmission shaft 11, a sixth gear 12, a seventh gear 13, an eighth gear 14, a feeding servo motor 15, a ninth gear 16, a tenth gear 17, a third transmission shaft 18 and a gearbox 19, wherein the stepless speed regulating motor 1 is arranged at the upper left part of the gearbox 19, the eighth gear 14 is arranged on an output shaft of the stepless speed regulating motor 1, the second transmission shaft 11 is arranged at the middle part of the gearbox 19, the first gear 2 is arranged on the second transmission shaft 11, the eighth gear 14 is meshed with the first gear 2, the seventh gear 13 is arranged at the middle part of the second transmission shaft 11, the sixth gear 12 is arranged at the middle part of the second transmission shaft 11, the lower end of a second transmission shaft 11 is provided with a pull rod 10 and a speed change oil cylinder 9, the middle of a gearbox 19 is provided with a first transmission shaft 8, the upper part of the first transmission shaft 8 is provided with a third gear 4, the upper part of the first transmission shaft 8 is provided with a second gear 3, the second gear 3 is meshed with a seventh gear 13, the upper part of the first transmission shaft 8 is provided with a fifth gear 7, the fifth gear 7 is meshed with a sixth gear 12, the middle of the gearbox 19 is provided with a spline housing 6, the spline housing 6 is provided with a fourth gear 5, the fourth gear 5 is meshed with the third gear 4, the upper right part of the gearbox 19 is provided with a feeding servo motor 15, the output shaft of the feeding servo motor 15 is provided with a tenth gear 17, the right part of the gearbox 19 is provided with a third transmission shaft 18, the third transmission shaft 18 is provided with a ninth gear 16, and the ninth gear 16 is meshed with.

The speed change principle of the spindle box of the stepless high-speed radial drilling machine is as follows:

(1) principle of main gear change

the main speed-changing system is a stepless speed-regulating system, and because the power source is a stepless speed-regulating motor 1, the revolution of the stepless speed-regulating motor 1 is transmitted to the main shaft 20 through a mechanical transmission system, the main shaft 20 also obtains stepless revolution; a speed reduction transmission mechanism is arranged between the stepless speed regulation motor 1 and the main shaft 20, firstly, the output torque of the main shaft 20 is improved, and secondly, the revolution of the stepless speed regulation motor 1 is reasonably utilized; in order to better adapt to the requirements of a machining process and expand the revolution range of the main shaft, a high-speed gear and a low-speed gear are arranged in a main transmission system; the revolution range of the stepless speed regulating motor 1 is 302r/min-4440r/min, and the main shaft 20 obtains the stepless speed regulating range of 16r/min-1600r/min through the speed reduction transmission of a transmission system; if the high-speed gear is not adopted, the main shaft 20 can only obtain the range of the revolution number of 16r/min-235r/min, and if the high-speed gear is adopted, the main shaft 20 can also obtain the range of the revolution number of 235r/min-1600 r/min; the two ranges of the revolution are added to enable the spindle 20 to obtain a range of the revolution of 16r/min-1600r/min, so that the requirement of the processing technology on the revolution of the spindle 20 can be met; the high-low gear is switched by a speed-changing oil cylinder, when a pull rod 10 in the speed-changing oil cylinder 9 moves downwards, a sixth gear 12 is pulled to be meshed with a fifth gear 7, so that a main shaft 20 obtains the revolution number in a low-speed range; when the pull rod 10 moves upwards, the sixth gear 12 is pulled to be meshed with the internal tooth part of the seventh gear 13, and the motion is transmitted to the main shaft 20 through the seventh gear 13, the second gear 3, the third gear 4 and the fourth gear 5, so that the main shaft 20 obtains the revolution in a high-speed range;

(2) Feed speed change principle

The feeding speed change system does not need to expand the range of the revolution, firstly, the reduction ratio of the feeding transmission system is large enough, so that the feeding force of the main shaft 20 can meet the processing requirement, secondly, the feeding amount of the mechanical processing is small, so the range of the feeding amount does not need to be large, and the range of the feeding amount does not need to be expanded from the feeding servo motor 15 to the main shaft 20; stepless speed regulation range of the feed servo motor 15: 2r/min-2500r/min, and the main shaft 20 obtains the feed amount of 0.04mm/r-0.94mm/r through a feed transmission system; thus, the requirement of the machining process on the feeding amount of the main shaft 20 can be met.

the principle of the electrical control system of the spindle box of the stepless high-speed radial drilling machine is as follows:

The main speed change and the feeding speed change are mainly controlled electrically, the stepless speed regulating motor 1 is an alternating current variable frequency stepless speed regulating motor, and the frequency of the stepless speed regulating motor 1 is changed through a frequency converter, so that the change of the rotating speed of the main shaft 20 is realized; the feeding motor is a feeding servo motor 15, and the rotating speed of the feeding servo motor 15 is changed through a servo system to realize feeding speed change; the main speed change has two speed ranges of high and low gears, so that the main speed change is realized not only by the speed change of the stepless speed regulating motor 1, but also by mechanical cooperation, the direction of pressure oil supply is controlled by an electromagnetic directional valve, and a low-speed transmission route or a high-speed transmission route is switched on; the main speed change and the feeding speed change are two independent speed change systems without connection, and belong to a sub-feeding system; in order to realize the feeding system, the operation habit of an operator is more met, the machine tool works more safely, the two systems can be linked through software, the feeding is changed into feeding, namely the main shaft 20 rotates one turn, and the feeding is operated according to a certain amount; the feed amount of each revolution of a main shaft 20 of a main shaft box of the stepless high-speed radial drilling machine can be adjusted within the range of 0.04mm/r-0.94mm/r, so that the requirement of mechanical processing is met; the main shaft speed change and feeding speed change operations are very simple and convenient, a control panel is arranged in front of a main shaft box, a digital display window is arranged on the control panel, the number of revolutions (r/min) of the main shaft can be displayed by numbers, the feeding amount (mm/r) can be displayed by numbers, and if the number of revolutions or the feeding amount of the main shaft is changed, only a speed regulating knob needs to be rotated; the main spindle box of the stepless high-speed radial drilling machine can be operated under the condition of no stopping no matter whether the main speed change or the feeding speed change is realized; when the main speed is changed in high and low speed, the main shaft 20 automatically changes to low speed rotation, and after the change, the main shaft 20 automatically needs a new rotation number.

the system transmission route of the spindle box of the stepless high-speed radial drilling machine is as follows:

(1) the low-gear transmission route of the main transmission system comprises the following steps: the stepless speed regulating motor 1, the eighth gear 14, the first gear 2, the sixth gear 12, the fifth gear 7, the third gear 4, the fourth gear 5 and the main shaft 20;

(2) The main transmission system high-speed gear transmission route: the stepless speed regulating motor 1, the eighth gear 14, the first gear 2, the seventh gear 13, the second gear 3, the third gear 4, the fourth gear 5 and the main shaft 20;

(3) A feeding transmission system: the system has only one transmission route, namely: the feeding servo motor 15, the tenth gear 17, the ninth gear 16, the worm and gear 21, the horizontal shaft 22, the spindle sleeve 23 and the spindle 20.