A single-motor drilling and production integrated surface production device

Abstract

The present application provides a kind of single motor drilling and production integrated surface sampling device, including shallow drill, DC brushless motor, drive screw rod, conversion shaft, conversion structure and take structure, one end output of DC brushless motor is connected shallow drill, to make DC brushless motor drive shallow drill rotation, the other end output of DC brushless motor is connected drive screw rod, drive screw rod is connected conversion shaft near the outer side wall of DC brushless motor, conversion shaft is connected with conversion structure, to make DC brushless motor drive drive screw rod clockwise rotation or counterclockwise rotation by conversion structure, can solve the problem that existing sampling device exists mass, single motor only realizes single function, and the problem of low work efficiency.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of unmanned sampling, and particularly relates to a single-motor drilling and sampling integrated surface sampling device. BACKGROUND

[0002] The key exploration task of extraterrestrial objects is to analyze the scientific research value of the layer rock and soil information on small celestial bodies. For the sampling work of extraterrestrial objects, manual sampling is more difficult than automatic sampling in terms of the difficulty of sampling, and the carrying capacity of the rocket is also higher, so for deep space sampling and exploration, automatic sampling is more common. In terms of economy and feasibility, the design of the extraterrestrial object sampling device should meet the sampling requirements while meeting the characteristics of low power consumption and light weight, but the existing sampling device has the problems of heavy quality, single motor only realizing single function and low working efficiency. SUMMARY

[0003] Therefore, the technical problem to be solved by the present application is to provide a single-motor drilling and sampling integrated surface sampling device, which can solve the problems of heavy quality, single motor only realizing single function and low working efficiency of the existing sampling device.

[0004] In order to solve the above problems, the present application provides a single-motor drilling and sampling integrated surface sampling device, which comprises a shallow drill, a direct-current brushless motor, a drive screw, a conversion shaft, a conversion structure and a sampling structure.

[0005] One end of the direct-current brushless motor is connected to the shallow drill, so that the direct-current brushless motor drives the shallow drill to rotate, and the other end of the direct-current brushless motor is connected to the drive screw, the drive screw is connected to the conversion shaft near the outer side wall of the direct-current brushless motor, and the conversion shaft is connected to the conversion structure, so that the direct-current brushless motor drives the drive screw to rotate clockwise or counterclockwise through the conversion structure.

[0006] The sampling structure is arranged on the outer surface of the drive screw away from the direct-current brushless motor, so that the drive screw drives the sampling structure to sample.

[0007] Optionally, the sampling structure comprises a push nut, a sampling piece, a guide pipe and a guide structure, the guide pipe is connected to the conversion shaft, the drive screw is movably arranged in the inner cavity of the guide pipe, the push nut is threadedly connected to the drive screw, the sampling piece is connected to one end of the push nut away from the direct-current brushless motor, and the sampling piece is connected to the inner side wall of the guide pipe through the guide structure, so that the drive screw drives the push nut to rotate and pushes the sampling piece to move linearly.

[0008] Optionally, the sampling structure further comprises an anti-dropping sealing column, which is arranged at one end of the drive screw and located at the end of the drive screw away from the direct-current brushless motor.

[0009] Optionally, the guide structure comprises guide grooves and guide blocks, the outer surface of the sampling sheet is provided with the guide blocks symmetrically with the central axis of the drive screw, the inner side wall of the guide tube is provided with the guide grooves symmetrically with the central axis of the drive screw, and the guide blocks are slidably arranged in the inner cavities of the guide grooves.

[0010] Optionally, the sampling device further comprises a sliding bearing, the sliding bearing is arranged on the outer surface of the drive screw, and the conversion shaft is connected with the conversion structure through the sliding bearing.

[0011] Optionally, the other end output end of the direct-current brushless motor is integrally made with the drive screw.

[0012] Advantages

[0013] The single-motor drilling and sampling integrated sampling device provided in the embodiment of the present application is fixedly connected with the output shaft of the direct-current brushless motor at one end. During drilling, the shallow drill is vertically downward, the shallow drill contacts the regolith, the mechanical arm provides a downward pressure, the direct-current brushless motor is positively rotated, the shallow drill is positively rotated and drilled, reaches the specified depth, the direct-current brushless motor is stopped, the shallow drill is pulled out, and the sampling device completes the drilling. During drilling, the guide tube and the drive screw are synchronously rotated, the guide tube is synchronously rotated with the sampling sheet, and the sampling sheet does not axially slide. The internal space of the guide tube realizes the function of preloading the sampling sheet. During sampling, the guide tube is vertically downward, the first sampling sheet at the front end of the guide tube contacts the collected regolith, the mechanical arm provides a downward pressure, the direct-current brushless motor is positively rotated, the guide tube and the drive screw are synchronously rotated, the guide tube is synchronously rotated with the sampling sheet, the sampling sheet does not axially slide, and the sampling device completes the rotary pressing and sampling. During sampling, the shallow drill is positively rotated. The drive screw and the output shaft of the direct-current brushless motor are integrally designed. During sheet feeding, the direct-current brushless motor is reversely rotated, the guide tube is fixedly arranged, the drive screw and the guide tube are relatively rotated, the guide groove in the inner hole of the guide tube and the guide structure on the outer wall of the sampling sheet are slidably arranged, the drive screw drives the push nut to move forward, the push nut drives the sampling sheet to move, until the sampling sheet after sampling is pushed out of the guide tube, and the sampling device completes the sheet feeding. During sheet feeding, the shallow drill is reversely rotated. The single motor realizes the functions of drilling, sampling and sheet feeding, has the advantages of high integration and light weight, the sampling sheet has the functions of quantitative sampling and sample particle size screening, multiple sampling sheets can be preloaded in the guide tube, the stratification information of the regolith sample can be ensured, and the drilling and sampling are integrated.

[0014] Advantages:

[0015] 1. The sampling device is designed to be integrated with drilling and sampling, a single motor is used to realize the functions of drilling, sampling and sheet feeding, and has the advantages of high integration and light weight.

[0016] 2. The sampling sheet has the functions of quantitative sampling and sample particle size screening.

[0017] 3. The guide pipe can pre-load multiple sampling sheets, which can realize multiple sampling points and multiple sampling times, and can ensure the stratification information of the asteroid sample. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 FIG. 1 is a front view of a table sampling device according to an embodiment of the present application;

[0019] Figure 2 FIG. 2 is a front view of a cross-section of the table sampling device according to the embodiment of the present application;

[0020] Figure 3 FIG. 3 is a left view of a cross-section of the sampling sheet according to the embodiment of the present application;

[0021] Figure 4 FIG. 4 is a perspective view of a cross-section of the table sampling device according to the embodiment of the present application;

[0022] Figure 5 FIG. 5 is a clockwise sampling torque test experiment diagram of a direct-current brushless motor according to the embodiment of the present application;

[0023] Figure 6 FIG. 6 is a counterclockwise sampling torque test experiment diagram of the direct-current brushless motor according to the embodiment of the present application.

[0024] The reference signs are as follows:

[0025] 1. Shallow drill; 2. Direct-current brushless motor; 3. Guide pipe; 4. Sliding bearing; 5. Driving screw; 6. Pushing nut; 7. Sampling sheet; 8. Anti-dropping sealing column; 9. Conversion shaft. DETAILED DESCRIPTION

[0026] For reference Figures 1 to 6 As shown in the drawings, according to the embodiment of the present application, a single-motor drilling and sampling integrated table sampling device realizes three functions of drilling, sampling and sheet feeding by a single motor, please refer to Figure 1 、 Figure 2 and Figure 4The device includes a shallow drill 1, a brushless DC motor 2, a drive screw 5, a conversion shaft 9, a sliding bearing 4, a conversion structure, and a sampling structure. One output end of the brushless DC motor 2 is connected to the shallow drill 1 so that the brushless DC motor 2 drives the shallow drill 1 to rotate. The other output end of the brushless DC motor 2 is connected to the drive screw 5. The drive screw 5 is connected to the conversion shaft 9 near the outer wall of the brushless DC motor 2. The conversion shaft 9 is connected to the conversion structure so that the brushless DC motor 2 drives the drive screw 5 to rotate clockwise or counterclockwise through the conversion structure. The sampling structure is set on the outer surface of the drive screw 5 on the side away from the brushless DC motor 2 so that the rotation of the drive screw 5 drives the sampling structure to perform sampling. The DC brushless motor 2 rotates to drive the shallow drill 1 to contact the soil. The shallow drill 1 drills to the specified depth, thus completing the drilling. The shallow drill 1 is then removed. The DC brushless motor 2 rotates again, first driving the drive screw 5 to rotate clockwise. The guide tube 3 and the drive screw 5 rotate synchronously, driving the sampling plate 7 to rotate synchronously. The sampling plate 7 completes the spinning sampling. Then, the DC brushless motor 2 drives the drive screw 5 to rotate counterclockwise, while the guide tube 3 remains stationary. That is, the drive screw 5 and the guide tube 3 rotate relative to each other. The sampling plate 7, under the action of the guide structure, moves linearly by pushing the nut 6, thereby pushing the sampling plate 7 to the outside of the guide tube 3, completing the plate delivery.

[0027] Please refer to Figure 2 and Figure 4 The structure includes a push nut 6, a sampling plate 7, a guide tube 3, an anti-detachment sealing post 8, and a guide structure. The guide tube 3 is connected to the conversion shaft 9, and the drive screw 5 is movably sleeved in the inner cavity of the guide tube 3. The push nut 6 is threadedly connected to the drive screw 5. The sampling plate 7 is connected to the end of the push nut 6 away from the DC brushless motor 2. The sampling plate 7 is connected to the inner wall of the guide tube 3 through the guide structure, so that the drive screw 5 drives the push nut 6 to rotate, pushing the sampling plate 7 to move linearly. The anti-detachment sealing post 8 is located at one end of the drive screw 5, at the end of the drive screw 5 away from the DC brushless motor 2.

[0028] Furthermore, the brushless DC motor 2 adopts a dual-output shaft structure. One output end of the brushless DC motor 2 is fixedly connected to the shallow drill 1 to realize the drilling function of the surface extraction device. The output shaft of the other output end of the brushless DC motor 2 is integrated with the drive screw 5, which not only improves the output power but also improves the output stability.

[0029] Furthermore, the inner diameter of the sliding bearing 4 matches the outer wall of the drive screw 5 and is located on the side close to the DC brushless motor 2. The inner diameter of the conversion shaft 9 matches the outer wall of the sliding bearing 4, which facilitates the installation of the conversion structure through the sliding bearing 4.

[0030] Further, the inner diameter of the conversion shaft 9 is also provided with a rolling bearing, that is, a sliding bearing 4 and a rolling bearing double support mode is adopted to connect with the conversion structure, wherein the conversion structure is two unidirectional mechanisms arranged in different directions, that is, the conversion shaft 9 is arranged between the two unidirectional mechanisms arranged in different directions, so as to realize the conversion of the sampling and feeding functions of the sampling device.

[0031] Further, the guide pipe 3 and the conversion shaft 9 are connected through threads, and are fixedly connected.

[0032] Further, the push nut 6 has an inner thread, the inner side wall of the sampling piece 7 is not in contact with the drive screw 5, the push nut 6 is sleeved on the drive screw 5 and is connected through threads, at the same time, the outer diameter of the push nut 6 and the sampling piece 7 is connected with the inner wall of the guide pipe 3 through a guide structure, so as to ensure the radial stable linear motion of the push nut 6 and the sampling piece 7.

[0033] Further, the guide structure includes guide blocks and guide grooves, the guide grooves are symmetrically arranged on the inner side wall of the guide pipe 3 and take the center axis of the drive screw 5 as the axis of symmetry, and the guide blocks are symmetrically arranged on the outer side wall of the sampling piece 7 and also take the center axis of the drive screw 5 as the axis of symmetry. Through the sliding connection between the guide blocks and the guide grooves, the guide effect is achieved, and the radial linear motion of the push nut 6 is ensured.

[0034] Further, the drive screw 5 is integrally designed with the output shaft of the DC brushless motor 2, and serves as a power output to drive the push nut 6 to move forward. The drive screw 5 penetrates through the push nut 6 and the sampling piece 7, the push nut 6 is screwed on the drive screw 5, and the push nut 6 and the sampling piece 7 are sleeved and stacked into the guide pipe 3 in a sleeved and stacked manner according to the sliding mode of the outer wall guide structure of the push nut 6 and the sampling piece 7 matched with the inner side wall of the guide pipe 3.

[0035] Further, the sampling piece 7 has the functions of quantitative sampling and sample particle size screening. The anti-falling sealing column 8 is fixedly connected to the distal end of the drive screw 5, that is, the end away from the DC brushless motor 2, which can prevent the sampling piece 7 from falling out of the guide pipe 3 in a natural state, and can also play a dustproof sealing role.

[0036] The present application designs a drilling and sampling integrated sampling device, which realizes the functions of drilling, sampling and feeding by a single motor, has the advantages of high integration and light weight, and the sampling piece 7 has the functions of quantitative sampling and sample particle size screening; a plurality of sampling pieces 7 can be preloaded in the guide pipe 3, which can realize multiple sampling at multiple points and also ensure the stratification information of the lunar soil sample.

[0037] Working principle:

[0038] Drilling:

[0039] The shallow drill is vertically downward, and the shallow drill 1 contacts the soil. The robotic arm provides downward pressure, and the DC brushless motor 2 rotates clockwise, i.e., forward rotation. The shallow drill 1 rotates forward and drills until it reaches the designated depth. The DC brushless motor 2 stops, and the shallow drill 1 is pulled out. The surface sampling device completes the drilling. During drilling, the guide tube 3 and the drive screw 5 rotate synchronously, and the guide tube 3 and the sampling plate 7 rotate synchronously. The sampling plate 7 does not slide axially.

[0040] During sampling:

[0041] The guide tube 3 is vertically downward, and the first sampling piece 7 at the front end of the guide tube 3 contacts the collected star soil. The robotic arm provides downward pressure, and the DC brushless motor 2 rotates clockwise, that is, in the forward direction. The guide tube 3 and the drive screw 5 rotate synchronously, and the guide tube 3 carries the sampling piece 7 to rotate synchronously. The sampling piece 7 has no axial sliding, and the sampling piece 7 completes the spinning sampling. During sampling, the shallow drill 1 rotates in the forward direction.

[0042] When sending the film:

[0043] The DC brushless motor 2 rotates counterclockwise, i.e., reverses, while the guide tube 3 remains stationary. The drive screw 5 and the guide tube 3 rotate relative to each other. The guide groove inside the guide tube 3 slides in cooperation with the guide structure on the outer wall of the sampling piece 7. The drive screw 5 drives the push nut 6 to move forward, and the push nut 6 pushes the sampling piece 7 to move until the sampling piece 7, which has completed sampling, is pushed out of the guide tube 3. The sampling device completes the piece delivery. During piece delivery, the shallow drill 1 reverses.

[0044] like Figure 5 As shown, under the no-load sampling condition of a single-cycle DC brushless motor rotating 360° on both axes and rotating forward at 120 rpm, the damping generated inside the mechanism of the metering device remains within the range of 0.02 to 0.06 Nm. The metering device operates well under sampling conditions, with smooth transmission, meeting the speed requirements. The mechanism resistance is much less than the rated output torque of the motor (0.5 Nm), having minimal impact on the sampling function and meeting the design requirements of the metering device's sampling function.

[0045] like Figure 6 As shown, during a single cycle, the damping generated inside the mechanism of the wafer feeding device during the reverse 30rpm wafer feeding process is maintained within the range of 0.03 to 0.18 Nm, which is less than the rated output torque of the motor of 0.5 Nm. There is no additional load, and the duration of the wafer feeding condition is ≤12.5s, which meets the design requirements of the wafer feeding function of the wafer feeding device.

[0046] Example 1:

[0047] In a single cycle, the DC brushless motor 2 provides driving force. Under no-load conditions when the sampling device rotates forward at 120 rpm, the damping generated inside the mechanism is in the range of 0.02 to 0.06 Nm, and the rated output torque of the DC brushless motor 2 of the sampling device is 0.5 Nm.

[0048] Embodiment 2:

[0049] In a single cycle, the brushless DC motor 2 provides driving force, and under the condition that the sampling device reverses the sample sheet 30 rpm, the damping generated inside the mechanism is in the range of 0.03-0.18 Nm, and the rated output torque of the brushless DC motor 2 of the sampling device is 0.5 Nm.

[0050] During drilling, the shallow drill 1 is vertically downward, the shallow drill 1 contacts the regolith, the mechanical arm provides downward pressure, the brushless DC motor 2 is forward rotated, the shallow drill 1 is forward drilled, reaches the specified depth, the brushless DC motor 2 is stopped, the shallow drill 1 is pulled out, and the sampling device completes drilling; during drilling, the guide pipe 3 is synchronously rotated with the driving screw 5, the guide pipe 3 is synchronously rotated with the sample sheet 7, and the sample sheet 7 has no axial sliding.

[0051] During sampling, the guide pipe 3 is vertically downward, the first sample sheet 7 at the front end of the guide pipe 3 contacts the collected regolith, the mechanical arm provides downward pressure, the brushless DC motor 2 is forward rotated, the guide pipe 3 is synchronously rotated with the driving screw 5, the guide pipe 3 is synchronously rotated with the sample sheet 7, the sample sheet 7 has no axial sliding, and the sample sheet 7 completes spinning sampling; during sampling, the shallow drill 1 is forward rotated.

[0052] During sheet feeding, the brushless DC motor 2 is reversed, the guide pipe 3 is fixed, the driving screw 5 and the guide pipe 3 are relatively rotated, the inner hole guide groove of the guide pipe 3 and the outer wall guide structure of the sample sheet 7 are cooperatively slid, the driving screw 5 drives the push nut 6 to move forward, the push nut 6 pushes the sample sheet 7 to move, until the sample sheet 7 after sampling is pushed out of the guide pipe 3, and the sampling device completes sheet feeding; during sheet feeding, the shallow drill 1 is reversed.

[0053] It is easy for those skilled in the art to understand that the above advantageous modes can be freely combined and superimposed without conflict.

Claims

1. A surface drilling and production integrated apparatus with a single motor, characterized in that, It comprises a shallow drill (1), a direct current brushless motor (2), a driving screw rod (5), a conversion shaft (9), a conversion structure and a sampling structure. One end of the direct current brushless motor (2) is connected with the shallow drill (1) to drive the shallow drill (1) to rotate, and the other end of the direct current brushless motor (2) is connected with the driving screw rod (5), the driving screw rod (5) is connected with the conversion shaft (9) near the outer side wall of the direct current brushless motor (2), and the conversion shaft (9) is connected with the conversion structure to drive the driving screw rod (5) to rotate clockwise or counterclockwise through the conversion structure. The sampling structure is arranged on the outer surface of the driving screw rod (5) away from the direct current brushless motor (2) to drive the sampling structure to sample through the rotation of the driving screw rod (5). The sampling structure comprises a pushing nut (6), a sampling sheet (7), a guide pipe (3) and a guide structure, the guide pipe (3) is connected with the conversion shaft (9), the driving screw rod (5) is movably arranged in the inner cavity of the guide pipe (3), the pushing nut (6) is threadedly connected with the driving screw rod (5), the sampling sheet (7) is connected with one end of the pushing nut (6) away from the direct current brushless motor (2), and the sampling sheet (7) is connected with the inner side wall of the guide pipe (3) through the guide structure to drive the pushing nut (6) to rotate and drive the sampling sheet (7) to move linearly through the driving of the driving screw rod (5). The direct current brushless motor (2) adopts a double-output shaft structure, one end of the output shaft of the direct current brushless motor (2) is fixedly connected with the shallow drill (1), and the other end of the output shaft of the direct current brushless motor (2) is integrally designed with the driving screw rod (5). The sampling structure further comprises an anti-falling sealing column (8), which is arranged at one end of the driving screw rod (5) and located at the end of the driving screw rod (5) away from the direct current brushless motor (2). The guide structure comprises a guide groove and a guide block, the outer surface of the sampling sheet (7) is symmetrically provided with the guide block with the central axis of the driving screw rod (5) as the center, the inner side wall of the guide pipe (3) is symmetrically provided with the guide groove with the central axis of the driving screw rod (5) as the center, and the guide block is slidably arranged in the inner cavity of the guide groove. The sampling device further comprises a sliding bearing (4), which is arranged on the outer surface of the driving screw rod (5), and the conversion shaft (9) is connected with the conversion structure through the sliding bearing (4).

2. The single-motor drilling and production integrated surface drilling rig of claim 1, wherein, The other end of the direct current brushless motor (2) is integrally made with the driving screw rod (5).

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