Drill rod assembly and ground drill

Abstract

The present invention provides a drill rod assembly, comprising: a drill rod, the drill rod comprising a drill shaft and a spiral drill blade installed on the drill shaft; and a diverter plate, the center of the diverter plate is provided with an axial hole matched with the drill shaft, and the diverter plate is fixedly installed on the drill shaft through the axial hole; the diverter plate abuts against the lower end of the spiral drill blade on the drill shaft; the diverter plate comprises a base plate and a drainage unit arranged on the base plate; the drainage unit comprises a drainage port arranged on the base plate, a drainage plate arranged on one side of the drainage port and located above the base plate, and a blade arranged on the other side of the drainage port and located below the base plate. Compared with the prior art, the diverter plate of the drill rod assembly of the present invention is provided with a drainage port, a drainage plate located on the upper side of the drainage port, and a blade located on the lower side of the drainage port, so that the drill rod assembly is not only easy to drill holes, but also not easy to be blocked when reversing and retracting the cutter.

Description

Technical Field

[0001] The invention relates to a drill rod assembly and an earth drill having the drill rod assembly. Background Art

[0002] Ground drills are widely used in digging holes for planting seedlings in sloping land, sandy land, and hard land, digging the outer perimeter of large trees, digging holes for fence piles, digging holes for fertilizing fruit trees and trees, and cultivating and weeding in landscaping projects. Digging hole diameter: 200-600mm. Ground drills can dig no less than 80 holes per hour. Calculated as working 8 hours a day, 640 holes can be dug, which is more than 30 times that of manual labor. Ground drills free people from heavy physical labor.

[0003] In order to facilitate drilling, existing drill rods are provided with a diverter plate, but when the drill is reversed and retracted, a large amount of soil will accumulate in the gap between the diverter plate and the drill blade, causing the drill to be blocked during the reversal process, making it difficult for the drill to be retracted from the drill hole.

[0004] In view of the above problems, it is necessary to provide a new earth drill to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a drill rod assembly, the diverter plate of the drill rod assembly is provided with a drainage port, a drainage plate located on the upper side of the drainage port and a blade located on the lower side of the drainage port, so that the drill rod assembly is not only easy to drill holes, but also not easy to get stuck when reversing and retracting the blade.

[0006] To achieve the above-mentioned purpose, the present invention provides a drill rod assembly, comprising: a drill rod, the drill rod comprising a drill shaft and an auger blade installed on the drill shaft; and a diverter plate, the center of the diverter plate is provided with an axial hole matching the drill shaft, and the diverter plate is fixedly installed on the drill shaft through the axial hole; the diverter plate abuts against the lower end of the auger blade on the drill shaft; the diverter plate comprises a substrate and a drainage unit arranged on the substrate; the drainage unit comprises a drainage port arranged on the substrate, a drainage plate arranged on one side of the drainage port and located above the substrate, and a blade arranged on the other side of the drainage port and located below the substrate.

[0007] As a further improvement of the present invention, the diverter plate is provided with a plurality of the drainage units, and the plurality of drainage units are rotationally symmetric about the axial hole.

[0008] As a further improvement of the present invention, the diverter plate has two drainage units.

[0009] As a further improvement of the present invention, an angle γ between the blade and the plane where the substrate is located is between 30 degrees and 60 degrees.

[0010] As a further improvement of the present invention, the angle γ between the blade and the plane where the substrate is located is 45 degrees.

[0011] As a further improvement of the present invention, the base plate is bent downward and extended from a side of the drainage port away from the drainage plate to form a mounting plate, and the blade is fixedly mounted on the mounting plate.

[0012] As a further improvement of the present invention, the guide plate is formed by bending and extending upward from a side of the guide port away from the blade.

[0013] As a further improvement of the present invention, an angle β between the guide plate and the plane where the base plate is located is not greater than 45 degrees.

[0014] As a further improvement of the present invention, the helix angle α of the auger blade is smaller than the included angle β.

[0015] As a further improvement of the present invention, the helix angle of the auger blade is α, the pitch of the auger blade is P, and the borehole diameter of the drill rod is D, then:

[0016] As a further improvement of the present invention, the base plate is circular, and its diameter is consistent with the diameter of the auger blade.

[0017] As a further improvement of the present invention, a side of the guide plate away from the base plate is tangent to the auger blade.

[0018] The invention also discloses an earth drill, comprising the above-mentioned drill rod assembly.

[0019] The beneficial effect of the present invention is that the diverter plate of the drill rod assembly of the present invention is provided with a drainage port, a drainage plate located on the upper side of the drainage port and a blade located on the lower side of the drainage port, so that the drill rod assembly is not only easy to drill holes, but also not easy to get stuck when reversing and retracting the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the earth drill of the present invention.

[0021] Figure 2 It is a three-dimensional structural schematic diagram of the support component.

[0022] Figure 3 It is a three-dimensional structural schematic diagram of the handle assembly.

[0023] Figure 4 yes Figure 3 Schematic diagram of the internal structure of the handle assembly shown.

[0024] Figure 5This is a schematic diagram of the coordination of the starting unit, locking unit, and reversing unit.

[0025] Figure 6 It is a partial schematic diagram of the drill pipe assembly.

[0026] Figure 7 It is a structural schematic diagram of the manifold.

[0027] Figure 8 It is a structural schematic diagram of the drive assembly installed on the supporting platform.

[0028] Fig. 9 yes Figure 8 Cross-sectional view of .

[0029] Fig.10 This is a bottom view of the earth drill with the drill rod assembly removed.

[0030] Fig.11 It is a schematic diagram of the internal structure of a handle assembly of another embodiment.

[0031] Fig.12 It is a schematic diagram of the internal structure of the handle assembly of the third embodiment.

[0032] Fig.13 yes Fig.12 Schematic diagram of the coordination of the trigger and locking handle of the handle assembly shown. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] See also Figure 1 As shown, the present invention discloses a drill 100, including a support assembly 10, a handle assembly 20 installed on the support assembly 10, a drill rod assembly 30, a drive assembly 40 installed on the support assembly 10 and used to drive the drill rod assembly 30 to work, a lighting assembly 50 and a brake assembly 60.

[0035] See also Figure 2 as well as Figure 1As shown, the support assembly 10 includes a support platform 11 and a bracket 12. The support platform 11 is in the shape of a plate and is fixedly mounted on the bracket 12. The support platform 11 is provided with a through hole 111, a torque bearing member 112 and a lamp trough 113 that cooperate with the drive assembly 40. The torque bearing member 112 is used to bear the torque transmitted to the support platform 11 by the drive assembly 40. The number of the torque bearing members 112 can be set as needed. When the number of the torque bearing members 112 is multiple, preferably, the torque bearing members 112 are evenly distributed around the periphery of the through hole 11. Such a setting can make each of the torque bearing members 112 bear nearly equal torque, thereby effectively avoiding the easy damage of some torque bearing members 112 due to uneven torque bearing. The lamp trough 113 penetrates the support platform 11 in a direction perpendicular to the support platform 11. In this embodiment, the number of the lamp trough 113 and the torque bearing member 112 is 3. The moment bearing member 112 and the lamp groove 113 are evenly distributed around the periphery of the through hole 11, and the moment bearing member 112 and the lamp groove 113 are arranged at intervals from each other. The bracket 12 includes a main bracket 121 and an armrest 122 formed by bending and extending from both sides of the main bracket 121. The support platform 11 is fixedly mounted on the main bracket 121 by screws. Preferably, a grip 1221 is also provided on the armrest 122 to enhance the user's hand feel.

[0036] See also Figure 3 , Figure 4 as well as Figure 5As shown, the handle assembly 20 is mounted on the handrail frame 122. In this embodiment, the handle 1221 is mounted on one side of the handrail frame 122, and the handle assembly 20 is mounted on the other side. Preferably, when the earth drill 100 is in a normal working state, the handle assembly 20 is located on the handrail frame 122 held by the operator's right hand. The handle assembly 20 includes a handle shell 21, a starting unit 22, a locking unit 23, and a reversing unit 24. The handle shell 21 includes a top wall 211, a bottom wall 212 arranged opposite to the top wall 211, and a side wall 213. The top wall 211, the bottom wall 212, and the side wall 213 are jointly arranged to form a receiving chamber 214 to accommodate the starting unit 22, the locking unit 23, and the reversing unit 24. The starting unit 22 includes a trigger 221 pivotally mounted on the handle shell 21 through a second pivot 224, a starting micro switch 222 matched with the trigger 221, and a trigger reset elastic element 223. The trigger 221 includes a handle arm 2211 and a trigger arm 2212 located on both sides of the second pivot 224. The handle arm 2211 passes through the side wall 213 of the handle shell 21 for user control. Preferably, the handle arm 2211 passes through the side wall 213 facing the drive assembly 40. Such a configuration can facilitate the user to control the handle arm 2211 with the thumb when holding the handle assembly 20, thereby bringing great convenience to the operator. The trigger arm 2212 is located in the receiving cavity 214 of the handle shell 21 and matches with the starting micro switch 222. When the user pushes the handle arm 2211, the trigger arm 2212 rotates around the second pivot 224 and abuts against the start micro switch 222, thereby triggering the start micro switch 222. At this time, the trigger reset elastic element 223 is in an elastic deformation state, and the start micro switch 222 directly or indirectly controls the operation of the drive assembly 40. When the start micro switch 222 directly sends a start signal to the drive assembly 40, the start micro switch 222 directly controls the operation of the drive assembly 40; when the start micro switch 222 sends a start signal to the control unit, and then the control unit controls the operation of the drive assembly 40, the start micro switch 222 indirectly controls the operation of the drive assembly 40. When the handle arm 2211 is released, the trigger 221 is reset under the action of the trigger reset elastic element 223.

[0037] See also Figure 4 as well as Figure 3As shown, the locking unit 23 includes a locking handle 231 pivotally mounted on the top wall 211 of the handle shell 21 through a third pivot 233 and a locking handle reset elastic element 232 that cooperates with the locking handle 231. The locking handle 231 includes a push arm 2311 and a locking arm 2312 located on both sides of the third pivot 233. The push arm 2311 passes through the top wall 211 of the handle shell 21 for user manipulation. The locking arm 2312 is located in the receiving cavity 214 of the handle shell 21 and cooperates with the trigger arm 2212. Please refer to Figure 5 As shown, when the locking unit 23 is in the locked state, the locking arm 2312 abuts against the trigger arm 2212, and the user cannot push the handle arm 2211. The start unit 22 is locked by the locking unit 23 and cannot start the drive assembly 40. When the user pushes the push arm 2311 to rotate around the third pivot 233, the locking arm 2312 also rotates around the third pivot 233 and disengages from the trigger arm 2212. At this time, the locking unit 23 is in the unlocked state, and the user can start the drive assembly 40 by pushing the handle arm 2211. Please refer to Figure 5 as well as Figure 3 As shown, the reversing unit 24 includes a slide rail 241 fixedly mounted on the side wall 213 of the handle shell 21, a slider 242 slidably mounted on the slide rail 241, and a reversing micro switch 243 matched with the slider 242. In this embodiment, the reversing micro switch 243 is located above the sliding direction of the slider 242. When the user pushes the slider 242 to slide along the slide rail 241, the slider 242 abuts against the reversing micro switch 243 and triggers the reversing micro switch 243 to work. At this time, the reversing micro switch 243 directly or indirectly sends a reversing signal to the drive assembly 40 to control the drive assembly 40 to rotate forward or reverse. The handle assembly 20 guides the operator's hand to a clenched state through the matching relationship between the starting unit 22 and the locking unit 23 and the positions of the two on the handle shell 21, so that the operator can respond to sudden large torque at any time, making it easy for the thumb of the trigger handle arm 2211 to release and trigger the power-off brake function of the entire machine, avoiding safety risks caused by failure to release the switch in time.

[0038] See also Figure 6 , Figure 7 as well as Figure 1As shown, the drill rod assembly 30 is installed on the drive assembly 40 to work under the drive of the drive assembly 40. The drill rod assembly 30 includes a drill rod 31 and a diverter plate 32 installed at one end of the drill rod 31 away from the drive assembly 40. The drill rod 31 includes a drill shaft 311 installed on the drive assembly 40 and a double spiral drill blade 312 installed on the drill shaft 311. Figure 6 as well as Figure 1 As shown, the helix angle of the auger blade 312 is α, the pitch is P, and the drilling diameter of the drill rod assembly 30 is D, then: The center of the diverter plate 32 is provided with an axial hole matched with the drill shaft 311 and is fixedly mounted on the drill shaft 311 through the axial hole. The diverter plate 32 includes a base plate 321 and a drainage unit 322 arranged on the base plate 321. The base plate 321 is roughly in the shape of a circular flat plate and is perpendicular to the drill shaft 311. The diameter of the base plate 321 is equal to the diameter D of the drill hole. The drainage unit 322 includes a drainage port 3221 arranged on the base plate 321, a drainage plate 3222 arranged on one side of the drainage port 3221 and located above the base plate 321, and a blade 3223 arranged on the other side of the drainage port 3221 and located below the base plate 321. The drainage plate 3222 is formed by bending and extending upward from the side of the drainage port 3221 away from the blade 3223. In this embodiment, the guide plate 3222 and the base plate 321 are integrally formed, but in other embodiments, the guide plate 3222 may also be a separate part and fixedly mounted on the base plate 321. The angle β between the guide plate 3222 and the plane where the base plate 321 is located is not greater than 45 degrees. Figure 7 As shown. Preferably, the helix angle α of the auger blade 312 is smaller than the angle β. The base plate 321 is bent downward and extended from the side of the drainage port 3221 away from the drainage plate 3222 to form a mounting plate 3211, and the blade 3223 is fixedly mounted on the mounting plate 3221 by screws. In the present embodiment, the blade 3223 is a separate part, but in other embodiments, the blade 3223 can also be an integral part with the base plate 321. In the present embodiment, the drainage plate 3222 and the mounting plate 3211 are made by stamping the base plate 321. The angle γ between the blade 3223 and the plane where the base plate 321 is located is between 30 degrees and 60 degrees. Preferably, the angle γ between the blade 3223 and the plane where the base plate 321 is located is 45 degrees. Please refer to Figure 6As shown, preferably, one end of the auger blade 312 close to the base plate 321 abuts against the base plate 321. With such a configuration, when the drill rod assembly 30 is working, the soil excavated by the blade 3223 can be continuously discharged by the auger blade 312. Preferably, one side 3224 of the guide plate 3222 away from the base plate 321 is tangent to the auger blade 312. With such a configuration, when the drill rod assembly 30 is reversed to withdraw from the borehole, the guide plate 3222 will change the direction of the friction force of the accumulated soil on the drill rod 31, thereby facilitating the smooth withdrawal of the drill rod assembly 30 from the borehole.

[0039] In this embodiment, the diverter plate 32 is provided with two drainage units 322, and the two drainage units 322 are centrally symmetrical about the drill axis 311. Such a configuration can make each drainage unit 322 equally stressed, so that the user can easily balance the earth drill 100. Of course, it can be understood that in actual applications, the number of the drainage units 322 can be set as needed. When the number of the drainage units 322 is greater than 2, the drainage units 322 are configured to be rotationally symmetrical about the drill axis 311.

[0040] See also Figure 8 , Fig. 9 as well as Figure 1As shown, the drive assembly 40 is fixedly mounted on the support platform 11 to drive the drill rod assembly 30 to work. The drive assembly 40 includes a drive motor 41, a housing 42, an air duct 43, a gear box 44, an output shaft 45, a connection seat 46, a bearing 47 and a bearing seat 48. A heat dissipation blade 411 is provided at one end of the drive motor 41 away from the connection seat 46, and a screw hole 412 is provided on the motor housing of the drive motor 41. The housing 42 is fixedly mounted on the support platform 11 by screws and cooperates with the connection seat 46 to form a receiving chamber 421. The receiving chamber 421 is used to receive the drive motor 41, the air duct 43 and the gear box 44. The housing 42 is provided with a battery slot 422 and a partition 423. The battery slot 422 is used to receive a battery assembly to power the earth drill 100. In this embodiment, the battery slot 422 is located on the side of the drive motor 41 close to the operator. Such an arrangement can maximize the distance between the operator and the drill rod assembly 30, thereby ensuring the operator's operating safety. Preferably, the battery slot 422 is symmetrical about the front-to-back direction AA, and the symmetry plane of the battery slot 422 is coplanar with the drill shaft 311. Such an arrangement makes the weight of the battery assembly on both sides of the symmetry plane equal, so that it is convenient for the user to balance the earth drill 100. The partition 423 abuts against the motor housing of the drive motor 41 and cooperates with the air guide cover 43 to separate the accommodating chamber 421 into an air inlet chamber 4211 and an air outlet chamber 4212. The heat dissipation blades 411 of the drive motor 41 are accommodated in the air outlet chamber 4212, and the rest of the drive motor 41 and the gear box 44 are accommodated in the air inlet chamber 4211. Preferably, an arc-shaped guide wall 431 is provided on the side of the air guide cover 43 facing the drive motor 41, so as to smoothly guide the hot air discharged by the heat dissipation blades 411 to the outside of the air outlet chamber 4212, and reduce the wind resistance of the hot air in the air outlet chamber 4212. One end of the gear box 44 cooperates with the drive motor 41, and the other end cooperates with the output shaft 45, so as to transmit the power output by the drive motor 41 to the output shaft 45. The box shell of the gear box 44 is provided with a screw hole 441. The connecting seat 46 is roughly truncated cone-shaped and partially passes through the through hole 111. The connecting seat 46 is fixedly mounted on the support platform 11 by screws, and a screw hole 461 is provided on it. The bearing 47 is sleeved on the output shaft 45, including a first bearing 471 located in the gear box 44 and a second bearing 472 located in the bearing seat 48. The output shaft 45 passes through the first bearing 471 , the second bearing 472 , and the bearing seat 48 , and protrudes out of the bearing seat 48 to cooperate with the drill rod assembly 30 .Since the first bearing 471 is disposed in the gear box 44, and the second bearing 472 is disposed in the bearing seat 48, the distance between the first bearing 471 and the second bearing 472 can be maximized, thereby effectively ensuring the output coaxiality of the output shaft 45. The bearing seat 48 is mounted on the end of the connecting seat 46 away from the driving motor 41, and is provided with a screw hole 481. The screw holes 412, 441, 461, 481 and the screws cooperate to fix the driving motor 41, the gear box 44, the connecting seat 46 and the bearing seat 48 together, and form a rigid integral structure, thereby effectively simplifying the assembly process.

[0041] See also Fig. 9 as well as Fig.10 As shown, preferably, the connecting seat 46 is provided with a torque transmission member 462 that cooperates with the torque bearing member 112. When the earth drill 100 is working, the torque transmission member 462 and the torque bearing member 112 cooperate to bear at least part of the shear force between the support assembly 10 and the drive assembly 40, so as to avoid the shear force being completely borne by the screw, thereby enhancing the safety performance of the earth drill 100 and avoiding the screw from breaking due to long-term bearing of large shear force, thereby causing safety problems. Of course, it can be understood that the number of the torque transmission member 462 and the torque bearing member 112 can be set as needed. When the number of the torque transmission member 462 and the torque bearing member 112 is not less than 2, preferably, the torque transmission member 462 and the torque bearing member 112 are evenly distributed around the drill rod assembly 30. In this embodiment, the torque bearing member 112 is a boss, and the torque transmission member 462 is a groove that cooperates with the boss.

[0042] See also Fig.10 As shown, the lighting assembly 50 is fixedly mounted on the connecting seat 46 to illuminate the working area. The lighting assembly 50 includes a lighting lamp 51 and a lampshade 52. The lampshade 52 passes through the lamp slot 113 (as shown in FIG. Figure 2 As shown in FIG. 1 , the light emitted by the lighting lamp 51 passes through the lamp slot 113, thereby illuminating the working area. In this embodiment, the number of the lighting assembly 50 and the moment bearing member 112 are both 3, and they are spaced apart from each other and evenly distributed around the drill rod assembly 30.

[0043] See also Fig.10The brake assembly 60 is fixedly mounted on the support platform 11. In this embodiment, the brake assembly 60 is mounted at the bottom of the support platform 11, but in other embodiments, the brake assembly 60 can also be mounted on the top of the support platform 11. The brake assembly 60 includes a trigger element 61 for directly or indirectly controlling the braking of the drive assembly 40 and a brake lever 62 pivotally mounted on the support platform 11 through a first pivot 63 and cooperating with the trigger element 61. In this embodiment, the trigger element 61 is a micro switch for directly or indirectly sending a brake signal to the drive assembly 40. A portion of the projection of the brake lever 62 on a plane perpendicular to the drill axis 311 is located outside the projection of the support assembly 10 on a plane perpendicular to the drill axis 311, that is, when the drill axis 311 is perpendicular to a horizontal plane, a portion of the projection of the brake lever 62 on the horizontal plane is located on the side of the bracket 12 away from the drive assembly 40. With such a configuration, when the earth drill 100 is out of control due to a stall, as the earth drill 100 rotates, the brake lever 62 will abut against the operator's body, thereby triggering the trigger element 61 to work, and then directly or indirectly controlling the driving assembly 40 to brake, thereby effectively preventing accidental injuries and enhancing the safety of the operator. In this embodiment, when looking from the top of the earth drill 100 to the bottom, the drill rod 31 of the earth drill 100 rotates clockwise, and the brake lever 62 is located on the left side of the operator, preferably below the left handrail 122; when the earth drill 100 is out of control due to a stall, the support assembly 10 rotates counterclockwise so that the brake lever 62 touches the operator's body and slides in a clockwise direction to trigger the trigger element 61 to work, so that the earth drill 100 stops working under the action of the brake assembly 60. Of course, it can be understood that the drill rod 31 of the earth drill 100 can also be set to rotate counterclockwise, and the brake lever can be located below the handrail 122 on the right side of the operator.

[0044] See also Fig.10As shown, the brake lever 62 includes a rigid rod 621 and a flexible rod 622. The flexible rod 622 is located at one end of the rigid rod 621 away from the first pivot 63. Such a configuration can prevent the brake lever 62 from causing harm to the operator's body when the earth drill 100 rotates out of control due to a stall. Preferably, the projection of the rigid rod 621 on a plane perpendicular to the drill axis 311 is located within the projection of the support assembly 10 on a plane perpendicular to the drill axis 311, that is, when the drill axis 311 is perpendicular to a horizontal plane, the projection of the rigid rod 621 on a horizontal plane is completely located on the side of the bracket 12 close to the drive assembly 40. Preferably, the projection of the flexible rod 622 on a plane perpendicular to the drill axis 311 is a first projection, and the projection of the support assembly 10 on a plane perpendicular to the drill axis 311 is a second projection. The first projection is at least partially located outside the second projection. Preferably, the portion of the first projection outside the second projection is located on one side of the operator's body. Of course, it is understood that in other embodiments, the flexible rod 622 can also be directly covered on the rigid rod 621. In this embodiment, the rigid rod 621 is bent and extended from one end close to the support platform 11 to one end close to the flexible rod 622, so that the rigid rod 621 is Z-shaped. The rigid rod 621 is provided with a supporting arm 6211 that cooperates with the trigger element 61, and the supporting arm 6211 and the flexible rod 622 are located on different sides of the first pivot 63. Of course, it is understood that in other embodiments, the supporting arm 6211 and the flexible rod 622 can also be located on the same side of the first pivot 63. Preferably, the support platform 11 is also provided with a limiting member 114 that cooperates with the brake rod 62 to limit the rotation range of the brake rod 62. Preferably, the brake assembly 60 is also provided with a first elastic element (not shown) that cooperates with the brake rod 62. When looking downward from the top of the earth drill 100, the drill rod 31 of the earth drill 100 rotates in a clockwise direction. Figure 1 As shown, when the brake rod 62 is in the first state, the brake rod 62 abuts against the trigger element 61, and the trigger element 61 is triggered to control the braking of the drive assembly 40, the first elastic element undergoes elastic deformation, and the brake rod 62 is in the N position; when the brake rod 62 is released, the brake rod 62 is reset under the action of the first elastic element, and the brake rod 62 is in the second state, the brake rod 62 is out of contact with the trigger element 61, and the brake rod 62 is in the M position.

[0045] In other embodiments, the brake lever 62 may also be configured such that the rigidity of the brake lever 62 gradually decreases from the end close to the support platform 11 to the end away from the support platform 11. With such a configuration, when the brake lever 62 touches the operator's body due to stalling, the rigidity of the portion of the brake lever 62 that touches the operator is relatively small, thereby achieving a braking effect without causing harm to the operator.

[0046] Fig.11 The handle assembly 70 of another embodiment of the present invention is shown. The handle assembly 70 is substantially the same as the handle assembly 20, and includes a handle shell 71, a start unit 72, a locking unit 73, and a reversing unit 74. The difference is that the handle arm 7211 of the trigger 721 passes through the bottom wall 712 of the handle shell 71 for the user to hold. The trigger arm 7212 of the trigger 721 is located in the handle shell 71 and cooperates with the start micro switch 722. The push arm 7311 of the locking handle 731 passes through the top wall 711 of the handle shell 71 for the user to manipulate, and the locking arm 7312 of the locking handle 731 is located in the handle shell 71 and cooperates with the trigger arm 7212. Preferably, a buckling portion 7313 is provided at one end of the locking arm 7312 close to the trigger arm 7212. When the locking unit 73 is in the locked state, the holding portion 7313 holds the end of the trigger arm 7212 away from the second pivot 724; when the locking unit 73 is in the unlocked state, the holding portion 7313 is out of contact with the trigger arm 7212. Preferably, a guide wall 7213 is provided on the side of the trigger arm 7212 facing the holding portion 7313. When the trigger 721 is in the open state, the holding portion 7313 abuts against the guide wall 7213; when the trigger 721 changes from the open state to the closed state, the holding portion 7313 slides along the guide wall 7213 to reset the trigger 721. The reversing micro switch 843 is located below the sliding direction of the slider 842.

[0047] Fig.12 The third embodiment of the present invention is shown as a handle assembly 80. The handle assembly 80 has a substantially similar structure to the handle assembly 70, except that the locking unit 83 includes a locking handle 831 slidably mounted on the handle housing 81 and a resetting elastic element 832. Fig.13As shown, the locking handle 831 includes a pushing arm 8311 and a locking arm 8312. The pushing arm 8311 passes through the side wall 813 of the handle shell 81 for the user to operate. The locking arm 8312 is located in the handle shell 81 and cooperates with the handle arm 8211. The locking arm 8312 is provided with a limiting portion 8313 and a clearance groove 8314. When the locking unit 83 is in a locked state, the limiting portion 8313 abuts against the handle arm 8211 so that the trigger 821 cannot rotate around the second pivot 824; when the locking unit 83 is in an unlocked state, the clearance groove 8314 faces the trigger 821 so that the trigger 821 can rotate around the second pivot 824.

[0048] Compared with the prior art, the earth drill 100 of the present invention can passively trigger the brake assembly 60 when it is stalled and out of control, thereby effectively preventing accidental injuries and enhancing the safety of the operator.

[0049] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A drill rod assembly, characterized in that: include: A drill rod, the drill rod comprising a drill shaft and a spiral drill blade mounted on the drill shaft; as well as A flow divider plate, wherein a shaft hole matching the drill shaft is provided at the center of the flow divider plate, and the flow divider plate is fixedly mounted on the drill shaft through the shaft hole; the flow divider plate abuts against the lower end of the spiral drill blade on the drill shaft; the flow divider plate comprises a base plate and a drainage unit provided on the base plate; the drainage unit comprises a drainage port provided on the base plate, a drainage plate provided on one side of the drainage port and located above the base plate, and a blade provided on the other side of the drainage port and located below the base plate; The side of the guide plate away from the base plate is tangent to the auger blade; The angle γ between the blade and the plane where the substrate is located is between 30 degrees and 60 degrees; The base plate is bent downward and extended from a side of the drainage port away from the drainage plate to form a mounting plate, and the blade is fixedly mounted on the mounting plate; The guide plate is formed by bending and extending upward from a side of the guide port away from the blade; The angle β between the guide plate and the plane where the base plate is located is not greater than 45 degrees.

2. The drill rod assembly according to claim 1, characterized in that: The diverter plate is provided with a plurality of the drainage units, and the plurality of the drainage units are rotationally symmetrical about the axial hole.

3. The drill rod assembly according to claim 2, characterized in that: The diverter plate has two flow guide units.

4. The drill rod assembly according to claim 1, characterized in that: The included angle γ between the blade and the plane where the substrate is located is 45 degrees.

5. The drill rod assembly according to claim 1, wherein: The helix angle α of the auger blade is smaller than the included angle β.

6. The drill rod assembly according to claim 1, characterized in that: The helix angle of the auger blade is α, the pitch of the auger blade is P, and the borehole diameter of the drill rod is D, then: 。 7. The drill rod assembly according to claim 1, wherein: The base plate is circular, and its diameter is consistent with the diameter of the auger blade.

8. An earth drill, characterized in that: Comprising a drill rod assembly as described in any one of claims 1 to 7.

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