Double-motor automatic feeding core drilling machine

Abstract

The utility model provides a double-motor automatic feeding drilling core machine, which is characterized in that a main shaft motor module and a feeding motor module of the automatic feeding drilling core machine are distributed on two sides of a rotary feeding composite module, and the main shaft motor module and the feeding motor module are mechanically connected at the tail end of a driving motor; and the automatic feeding drill controller and the composite cable connector are concentrated on the right lower side of the equipment. The main shaft motor module and the feeding motor module respectively provide power sources for the rotating motion and the feeding motion of the screw rod for the rotating and feeding composite module, so that the rotating speed and the feeding speed of the screw rod are controlled; the screw rod drives the drill bit to do controlled rotary feeding motion, and drilling machining is completed; the main shaft motor realizes output of two power transmission paths of the main shaft motor module through switching of forward rotation and reverse rotation, and realizes invariable-speed output and 2.5-3.6-time acceleration output of the main shaft motor module through cooperation of different gear sets. According to the utility model, the coverage of different rotating speeds and feeding speeds can be realized on the layout of the gear set, and the gear set has a stable closed structure, a reasonable hand holding space and a convenient operation mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of high-performance automatic feed drilling structure, more particularly to a double-motor-driven automated feed drilling machine. BACKGROUND

[0002] Automatic feed drilling equipment is a kind of mechanical equipment for drilling, which can automatically control the rotation and feed movement of the drill bit. Due to its high drilling accuracy, compact structure and other characteristics, it is widely used in on-site drilling of large mechanical equipment, such as aircraft (reference patent CN117564804A), high-speed rail (reference patent CN214557580U) and other fields.

[0003] Currently, since the automatic feed drilling requires manual handling during drilling, its structure is often designed very compact to achieve lightweight design requirements and reduce the labor intensity of workers, which also leads to significant changes in its structure form with changes in technical conditions. US patent US1989479983 proposes a torque protection mechanism for an automatic feed drilling powered by compressed air. Patent CN105228798 proposes an automatic feed drilling with a modular structure, which mainly adds an external accessory to the traditional pneumatic automatic feed drilling to achieve air logic control, thereby achieving device start, back-off and other operations, improving the convenience of operation. However, the automatic feed drilling powered by a pneumatic motor cannot achieve flexible control of rotation speed and feed speed. In the context of the widespread use of composite materials, drilling tools have been modified with dual motors to maintain their compatibility with high-speed low-feed for composite materials, low-speed small-feed for titanium alloys, and high-speed feed for aluminum alloys. To this end, patents US09387541B2 and EP3238874B1 propose two gear layout concepts that can control rotation speed and feed speed with two motors, but neither of these two gear layout schemes takes into account the material drilling conditions, current motors, gears, and clutches, and provides a reasonable automatic feed drilling power transmission scheme. More importantly, they do not address the operation logic and control method of the automatic feed drilling system. SUMMARY

[0004] The utility model aims to provide a double-motor automatic feed drilling core machine, a new automatic feed drilling gear and power system layout structure that can cover different rotation speeds and feed speeds, with a stable closed structure, reasonable hand holding space and convenient operation method.

[0005] To solve the above problems, the utility model adopts the following technical solutions:

[0006] A double-motor automatic feed drilling core machine, comprising: a spindle motor module 11, a feed motor module 12, a rotary feed composite module 13, an automatic feed drilling core machine controller 14, and a composite cable connector 15; the above modules are assembled and placed in the appearance cover 17 as a whole; the feed motor module 12 and the spindle motor module 11 are distributed on both sides of the rotary feed composite module 13, and the three are combined to form a hollow closed structure, which constitutes the main mechanical transmission structure of the automatic feed drilling core machine; the screw rod 16 is connected with the drill bit 2 through threads; the screw rod 16 is connected with the rotary feed composite module 13 through threads and keys; the automatic feed drilling core machine controller 14 and the composite cable connector 15 are connected to the spindle motor module 11; the spindle motor module 11 and the feed motor module 12 provide two independent power sources and input them into the rotary feed composite module 13, so as to control the rotation speed and feed speed of the screw rod 16; the spindle motor module provides the rotary motion of the screw rod, the feed motor module controls the feed motion of the screw rod, and the two work together to enable the screw rod 16 to drive the drill bit 2 to realize controlled rotary feed motion, thereby realizing drilling processing; the spindle motor realizes the output of the two power transmission paths of the spindle motor module through forward and reverse switching, and realizes the 2.5~3.6 times speed-up output of the spindle motor module through different gear sets, and the specific speed-up ratio is determined according to actual use requirements.

[0007] The foregoing double-motor automatic feed drilling core machine, the spindle motor module 11 comprises a spindle motor 101, an internal power transmission path composed of gear components, and an external shell, the spindle motor 101 is an inner rotor motor, and the rated power thereof is 600~1300W; the gear shaft I 102 of the spindle motor 101 is a hollow structure, and a needle roller clutch I 103 is placed in the inside thereof; when the spindle motor gear shaft I 102 rotates forward in a clockwise direction, the rotation speed of the bevel gear I 105 is the same as that of the gear shaft I 102; when the spindle motor gear shaft I 102 rotates reversely in an anticlockwise direction; the rotation speed of the bevel gear I 105 is 2.5~3.6 times that of the gear shaft I 102.

[0008] The foregoing double-motor automatic feed drilling core machine, the feed motor module 11 is an inner rotor motor, and the rated power thereof is 75W~200W, which comprises a motor stator, a motor shell, a motor rotor gear shaft, and an encoder; the output end of the feed motor 201 is a gear shaft; the power transmission process of the feed motor module is as follows: the rear end of the feed motor 201 is a double-stage planetary system, the gear shaft IV 202 at the end of the feed motor 201 acts as a sun gear, and the power is transmitted to the planetary system 204; the gear ring I 203 of the planetary system is fixed, and the planetary carrier 205 acts as a power output end and outputs the power provided by the feed motor after speed reduction and torque increase.

[0009] In the aforementioned dual-motor automatic feed drilling core machine, the power of the main spindle motor 101 is output through gear shaft I 102. When the main spindle motor gear shaft I 102 rotates clockwise, the motor power is transmitted to the guide rod of gear shaft II 104 through needle roller clutch I 103. Gear shaft II 104 then transmits the power to bevel gear I 105 via a key. In this power transmission path, the bevel gear I 105 rotates at the same speed as the output speed of motor 101. When the main spindle motor rotor 101 rotates counterclockwise, the motor power is transmitted to gear I 107 via the rotor shaft, and then to the next gear shaft III 108. 08 transmits power to gear II 109 through the smooth rod section. Gear II 109 transmits power to the tooth surface of gear shaft II 104 through its external tooth surface. Gear shaft II 104 drives bevel gear I 105 to rotate. Under this power transmission path, bevel gear I 105 transmits power to bevel gear II 106. The rear end of feed motor 201 is a multi-stage planetary system. Gear shaft IV 202 at the end of feed motor 201 serves as the sun gear, transmitting power to planetary system 204. The gear ring I 203 of this planetary system is fixed, and the planet carrier 205 serves as the power output end, reducing and increasing the torque output of the power provided by the feed motor.

[0010] The aforementioned dual-motor automatic feed drilling core machine includes a rotary feed composite module comprising an outer housing and an internal power transmission system consisting of gears and a planetary gear train. The gear on one side of the bevel gear shaft acts as the sun gear, inputting power into a planetary reduction system composed of a gear ring II 307, planetary gear I 306, and a compound gear I 308. In this system, the gear ring II 307 is fixedly connected to the housing II 302, the spur gear on one side of the bevel gear II 106 acts as the sun gear for power input, and the compound gear I 308 acts as the planet carrier for power output. The power output from the feed motor module is transmitted to the bevel gear shaft 303 via the planet carrier 205, and then to the bevel gear III 304. The bevel gear III 304 interacts with the gear shaft V 3. 05 Mechanical connection and fixation; Compound gear I 308 transmits rotational power to gear shaft VI 309 through the outer gear. The inner side of gear shaft VI 309 is a flat key, which can drive the rotation of lead screw 16 and allow lead screw 16 to slide in the drilling direction along the flat key on the inner side of gear shaft VI 309; The inner side of compound gear I 308 is an internal gear, which, together with planet gear II 310, gear shaft V 305, compound gear II 311, and compound gear I 308, forms a differential gear train; Compound gear II 311 transmits power to gear 312 through the outer teeth. The inner side of gear 312 is a lead screw nut, which cooperates with lead screw 16, so that gear 312 can convert rotational motion into forward and backward translational motion of lead screw 16.

[0011] Drilling Operation: Once the system consisting of the automatic feed drill core machine 1, composite cable 5, and main controller 3 is connected, and the machining program stored in the memory chip of the automatic feed drill handheld controller 14 is successfully transmitted to the main controller 3, the preparation work is complete. The operator sends control commands to the main controller 3 through the automatic feed drill core machine controller 14. The main controller 3 controls the various functional components of the automatic feed drill to realize the drilling operation.

[0012] Beneficial effects:

[0013] (1) This utility model achieves a 2.5 to 3.6 times speed increase output of the spindle motor module through different gear sets, thus covering different rotation speeds and feed speeds.

[0014] (2) The spindle motor module and feed motor module of this utility model are distributed on both sides of the rotary feed composite module, and the automatic feed drill controller and composite cable connector are concentrated on the lower right side of the equipment. The whole has a stable closed structure, reasonable hand grip space and convenient operation mode. Attached Figure Description

[0015] Figure 1 Assembly drawing of the core machine for automatic feed drilling;

[0016] Figure 2 Exploded view of the core machine for automatic feed drilling;

[0017] Figure 3 An exploded view of the spindle motor module;

[0018] Figure 4 Exploded view of the feed motor module;

[0019] Figure 5 Exploded view of the rotary feed composite module;

[0020] Figure 6 This is a view of the main mechanical structure of the automatic feed drilling core machine;

[0021] Figure 7 The complete state of the automatic feed drill handpiece equipped with an indexing bayonet nose tube.

[0022] Figure 8 The complete state of the automatic feed drill handpiece equipped with an expansion chuck nose tube.

[0023] Figure 9 This is a schematic diagram of the components of an automatic feed drilling system;

[0024] The main components in the attached drawings are described as follows: Core machine-1, Drill bit-2; Main controller-3, Upper machine position-4, Composite cable-5; Spindle motor module-11, Feed motor module-12, Rotary feed composite module-13, Automatic feed drilling core machine controller-14, Composite cable connector-15, Lead screw-16, Exterior cover-17; Spindle motor-101, Gear shaft I-102, Needle roller clutch I-103, Gear shaft II-104, Bevel gear I-105, Bevel gear I-106, Gear I-107, Gear shaft III-1 08, Gear II-109, Needle Roller Clutch II-110, Housing III-111, Housing IV-411; Feed Motor-201, Gear Shaft IV-202, Gear Ring I-203, Planetary System-204, Planet Carrier-205; Housing I-301, Housing II-302, Bevel Gear Shaft-303, Bevel Gear III-304, Gear Shaft V-305, Planetary Gear I-306, Gear Ring II-307, Compound Gear I-308, Gear Shaft VI-309, Planetary Gear II-310, Compound Gear II-311, Gear-312. Detailed Implementation

[0025] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0026] Example

[0027] Figures 1-2 The mechanical structure of the dual-motor automatic feed drilling core machine is shown, among which... Figure 1 Assembly drawings for the core machine of the automatic feed drilling system. Figure 2 Exploded view of the core machine for automatic feed drilling.

[0028] The core machine 1 of the automatic feed drill has the following functions: 1. Drives the lead screw 16 to perform rotational and feed movements. The lead screw 16 is connected to the drill bit 2 through a thread, thereby realizing the controlled rotation and feed of the drill bit; 2. Realizes the transmission of control signals, power current, gas, and liquid; 3. Realizes the handheld control of the automatic feed drill and the storage of processing programs.

[0029] To achieve the two functions mentioned above in the automatic feed drilling core machine 1, its structure is mainly divided into the following parts: spindle motor module 11, feed motor module 12, rotary feed composite module 13, automatic feed drilling core machine controller 14, composite cable connector 15, outer cover 17, and lead screw 16. The specific functions of each component are as follows: the spindle motor module 11 and feed motor module 12 provide two independent power sources, which are then input into the rotary feed composite module 13, thereby controlling the rotational speed and feed rate of the lead screw 16. The composite cable connector 15 is responsible for introducing external power into the spindle motor module 11 and feed motor module 12, and transmitting data from the spindle motor module 11, feed motor module 12, and automatic feed drilling core machine controller 14. In addition, it also serves the purposes of compressed air transmission and cooling / lubricating medium transmission. The automatic feed drilling core machine controller is responsible for external communication between the equipment and the operator. It has multiple buttons, which the operator can use to start, stop, and control the equipment. It also has a screen to display the current operation of the equipment. The outer cover 17 mainly protects the cables around the automatic feed drilling core machine controller 14 and the composite cable connector 15 from damage during use.

[0030] Figure 3 The exploded view of the spindle motor module 11 includes: a spindle motor 101, an outer housing consisting of housing Ⅲ111 and housing Ⅳ411, and an internal power transmission path consisting of gear components such as gears and gear shafts.

[0031] Here, since the housing of the spindle motor 101 needs to be in direct contact with the operator, the spindle motor 101 is preferably an internal rotor motor with a rated power of 600~1300W. It consists of a motor stator, a motor housing, a motor rotor gear shaft, and an encoder, and the output end of the feed motor 101 is a gear shaft.

[0032] Since drilling is a unidirectional machining process, while motor rotation is a bidirectional machining process, in order to expand the capabilities of the spindle motor module, the motor can switch between forward and reverse rotation to achieve output from two power transmission paths of the spindle motor module, thereby enabling different gear sets to work together to achieve constant speed output and 3x speed increase output of the spindle motor module.

[0033] The power of the main spindle motor 101 is output through gear shaft I 102, which is a hollow structure containing a needle roller clutch I 103. When the main spindle motor rotor gear shaft I 102 rotates clockwise (forward), the motor power is transmitted to the smooth part of gear shaft II 104 through the needle roller clutch I 103. Gear shaft II 104 then transmits the power to bevel gear I 105 via a key, and bevel gear I 105 transmits the power to bevel gear II 106. In this power transmission path, the rotational speed of bevel gear I 105 is the same as that of motor 101.

[0034] When the main spindle motor rotor gear shaft I102 rotates counterclockwise (reverse), the motor power is transmitted from rotor gear shaft I102 to gear I107, and then to the next gear shaft III108. Gear shaft III108 transmits power through the smooth rod section to the needle roller clutch II110 inside gear II109, thus transmitting power to gear II109. Gear II109 then transmits power to the tooth surface of gear shaft II104 through its tooth surface, causing gear shaft II104 to rotate. Gear shaft II104 drives bevel gear I105 to rotate, and bevel gear I105 drives the bevel gear shaft to rotate. In this power transmission path, the rotational speed of bevel gear I105 is three times the rotational speed of motor 101.

[0035] Figure 4 The specific exploded view of the feed motor module 11 shows that it mainly consists of a feed motor 201 and a housing forming the outer shell, and gear components such as gear ring I 203, planetary system 204, and planet carrier 205 forming the internal power transmission path.

[0036] Here, since the housing of the feed motor 201 needs to be in direct contact with the operator, the feed motor 201 is preferably an internal rotor motor with a rated power of 75W~200W. It consists of a motor stator, a motor housing, a motor rotor gear shaft, and an encoder, with the output end of the feed motor 201 being the gear shaft.

[0037] The specific power transmission process of the feed motor module is as follows: the rear end of the feed motor 201 is a two-stage planetary system. The gear shaft IV 202 at the end of the feed motor 201 serves as the sun gear, transmitting power to the planetary system 204. The gear ring I 203 of this planetary system is fixed, and the planet carrier 205 serves as the power output end, reducing and increasing the torque output of the power provided by the feed motor.

[0038] Figure 5 The exploded view of the rotary feed composite module 13 shows that the system consists of an outer shell composed of housing I 301 and housing II 302, and an internal power transmission system composed of numerous gears and planetary gear trains.

[0039] The power output from the spindle motor 101 of the spindle motor module 11 is input to the planetary reduction system, which consists of a gear ring II 307, planetary gear I 306, and compound gear I 308 (planetary carrier), via bevel gear II 106. In this system, gear ring II 307 is fixedly connected to housing II 302. The power output from the feed motor 201 of the feed motor module 12 is transmitted to the bevel gear shaft 303 via the planetary carrier 205, and then to the bevel gear III 304. Bevel gear III 304 is fixedly connected to gear shaft V 305. Compound gear I 308 transmits rotational power to gear shaft VI 309 via the outer gear. The inner side of gear shaft VI 309 is a flat key, which can drive the rotation of the rotary feed compound lead screw 16 and allows the lead screw 16 to slide along gear shaft VI 309 in the drilling direction. The inner side of compound gear I 308 is an internal gear, which, together with planet gear II 310, gear shaft V (sun gear shaft) 305, compound gear II 311 (planet carrier), and compound gear I 308 (gear ring), forms a differential gear train. Compound gear II 311 transmits power to gear 312 through its outer teeth. The inner side of gear 312 is a lead screw nut, which cooperates with lead screw 16 to convert the rotational motion of gear 312 into the forward and backward movement of lead screw 16.

[0040] Figure 6 The mechanical components of an automatic feed drilling core machine, consisting of a spindle motor module 11, a feed motor module 12, and a rotary feed composite module 13, are displayed. The feed motor module 12 and the spindle motor module 11 are located on either side of the rotary feed composite module 13. The feed motor module 12 is mechanically connected to housing I 301, and the spindle motor module 11 is mechanically connected to housing II 302. The feed motor module 12 and the spindle motor module 11 are also mechanically connected at the rear end covers of the feed motor 201 and the spindle motor 101. The spindle motor module 11, feed motor module 12, and rotary feed composite module 13 combine to form a hollow, enclosed structure. This enclosed structure ensures structural stability and provides a reasonable hand grip space, allowing the thumb and forefinger to grip housing III 111 while keeping the four fingers secure within the enclosed structure.

[0041] Figure 7 and Figure 8 Two automatic feed drilling machines equipped with the automatic feed drilling core were showcased.

[0042] Figure 7 The complete state of the automatic feed drill handpiece equipped with indexable bayonet nose tube 2.

[0043] Figure 8 The complete state of the automatic feed drill handpiece equipped with the expansion chuck nose tube 3.

[0044] The following is combined Figure 9Taking an automatic feed drill equipped with an indexable bayonet nose tube as an example, the working process of an automatic feed drill equipment is explained in detail:

[0045] The automatic feed drilling core unit 1, along with the composite cable 2, main controller 3, and host computer 4, constitutes the automatic feed drilling system. The automatic feed drilling core unit 1 is responsible for driving the drill bit to perform drilling operations, storing the machining program, and controlling the machining process. The composite cable 2 is responsible for transmitting power, signals, gas, and other media. The main controller 3 is responsible for the overall control of the equipment, including program communication with the host computer 4, communication with the automatic feed drilling core unit controller 14, and control of the motor drive module. The automatic feed drilling core unit controller 14 contains a memory chip, enabling power-off storage even when the cable is disconnected. The host computer 4 is responsible for programming the machining program and high-precision online monitoring.

Claims

1. A dual-motor automatic feed drilling core machine, characterized in that, include: The main spindle motor module (11), feed motor module (12), rotary feed composite module (13), automatic feed drilling core machine controller (14), and composite cable connector (15) are assembled and placed inside the outer cover (17). The feed motor module (12) and the spindle motor module (11) are located on both sides of the rotary feed composite module (13). The three components are combined to form a hollow, closed structure, which constitutes the main mechanical transmission structure of the automatic feed drilling core machine. The lead screw (16) is connected to the drill bit (2) by a thread. The lead screw (16) is connected to the rotary feed composite module (13) by a thread and a flat key. The automatic feed drilling core machine controller (14) and the composite cable connector (15) are connected to the spindle motor module (11). The spindle motor module (11) and the feed motor module (12) are responsible for providing two independent power sources and inputting them into the rotary feed composite module (13) to achieve controlled rotational speed and feed speed of the lead screw (16). The spindle motor module is responsible for providing the rotational motion of the lead screw, and the feed motor module controls the feed motion of the lead screw. The two work together to enable the lead screw (16) to drive the drill bit (2) to achieve controlled rotary feed motion, thereby realizing drilling. The spindle motor achieves the output of two power transmission paths of the spindle motor module by switching between forward and reverse rotation. Through different gear sets, the spindle motor module can achieve a speed increase of 2.5 to 3.6 times. The specific speed increase ratio is determined according to the actual use requirements.

2. The dual-motor automatic feed drilling core machine according to claim 1, characterized in that, The spindle motor module (11) includes a spindle motor (101), an internal power transmission path composed of gear components, and an external housing. The spindle motor (101) is an internal rotor motor with a rated power of 600~1300W. The gear shaft I (102) of the spindle motor (101) is a hollow structure, and a needle roller clutch I (103) is placed inside it. When the spindle motor gear shaft I (102) rotates clockwise, the speed of bevel gear I (105) is the same as the speed of gear shaft I (102). When the spindle motor gear shaft I (102) rotates counterclockwise, the speed of bevel gear I (105) is 2.5~3.6 times the speed of gear shaft I (102).

3. The dual-motor automatic feed drilling core machine according to claim 1, characterized in that, The feed motor module (12) is an internal rotor motor with a rated power of 75W~200W. It includes a motor stator, a motor housing, a motor rotor gear shaft, and an encoder. The output end of the feed motor (201) is a gear shaft. The power transmission process of the feed motor module is as follows: the rear end of the feed motor (201) is a two-stage planetary system. The gear shaft IV (202) at the end of the feed motor (201) serves as the sun gear and transmits power to the planetary system (204). The gear ring I (203) of this planetary system is fixed, and the planet carrier (205) serves as the power output end, which decelerates and increases the torque of the power provided by the feed motor.

4. A dual-motor automatic feed drilling core machine according to claim 2, characterized in that, The power of the main spindle motor (101) is output through gear shaft I (102). When the main spindle motor gear shaft I (102) rotates clockwise, the motor power is transmitted to the smooth part of gear shaft II (104) through needle roller clutch I (103). Gear shaft II (104) transmits the power to bevel gear I (105) through a key. In this power transmission path, bevel gear I (105) has the same output speed as the motor. When the main spindle motor rotor rotates counterclockwise, the motor power is transmitted to gear I (107) through the rotor shaft, and then to the next gear shaft III (108). Gear shaft III (108) transmits the power to the smooth part through the smooth part. Gear II (109) transmits power to the tooth surface of gear shaft II (104) through the external tooth surface. Gear shaft II (104) drives bevel gear I (105) to rotate. Under this power transmission path, bevel gear I (105) transmits power to bevel gear II (106). The rear end of the feed motor (201) is a multi-stage planetary system. The gear shaft IV (202) at the end of the feed motor (201) serves as the sun gear and transmits power to the planetary system (204). The gear ring I (203) of this planetary system is fixed and the planet carrier (205) serves as the power output end, which decelerates and increases the torque output of the power provided by the feed motor.

5. A dual-motor automatic feed drilling core machine according to claim 1, characterized in that, The rotary feed composite module includes an outer housing and an internal power transmission system consisting of gears and planetary gear trains. Among them, the gear on one side of the bevel gear shaft serves as the sun gear, which inputs power into the planetary reduction system consisting of gear ring II (307), planet gear I (306), and composite gear I (308). In this system, gear ring II (307) is connected and fixed to housing II (302), the spur gear on one side of the bevel gear shaft serves as the sun gear to input power, and composite gear I (308) serves as the planet carrier to output power. The power output by the feed motor module is transmitted to the bevel gear shaft (303) through the planet carrier (205), and then to the bevel gear III (304). The bevel gear III (304) is mechanically connected and fixed to the gear shaft V (305). The compound gear I (308) transmits rotational power to the gear shaft VI (309) through the outer gear. The inner side of the gear shaft VI (309) is a flat key, which can drive the rotation of the lead screw (16) and allow the lead screw (16) to slide in the drilling direction along the flat key inside the gear shaft VI (309). The inner side of the compound gear I (308) is an internal gear, which together with the planet gear II (310), the gear shaft V (305), the compound gear II (311), and the compound gear I (308) form a differential gear train. The compound gear II (311) transmits power to the gear (312) through the outer teeth. The inner side of the gear (312) is a lead screw nut, which cooperates with the lead screw (16) so that the gear (312) can convert the rotational motion into the forward and backward translation of the lead screw (16).

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