Trenchless drilling rig single motor clutch type power head

Abstract

The utility model relates to a kind of single-motor clutch type power head of trenchless drilling rig, including box, hydraulic motor is provided outside box;It further includes spline shaft, first spline gear, second spline gear, double spline sleeve, push rack, inner shaft and outer shaft;The number of hydraulic motor is only one, first spline gear is located on spline shaft, inner shaft and outer shaft are rotatably connected with box;Inner shaft is driven gear and first spline gear transmission connection;Second spline gear is rotatably connected with box, double spline sleeve is movably arranged on spline shaft, push rack can drive double spline sleeve along spline shaft to engage or separate second spline gear, outer shaft is driven gear and second spline gear transmission connection.The utility model reduces two hydraulic motors to one under the premise of realizing the common drive and separate drive of inner drill rod and outer drill rod of inner and outer drill rod, reduce the weight of double drive power head, simplify the hydraulic system of trenchless drilling rig.

Description

Technical Field

[0001] This utility model relates to the field of trenchless drilling rigs, specifically to a single-motor clutch-type power head for trenchless drilling rigs. Background Technology

[0002] The inner and outer drill pipes typically consist of an inner drill pipe and an outer drill pipe, with the inner drill pipe located inside the outer drill pipe and coaxially arranged. The inner and outer drill pipes require a drilling rig with dual drive heads to achieve separate driving of the inner and outer drill pipes.

[0003] Existing drilling rigs with dual drive heads mostly have two hydraulic motors on their dual drive heads, which drive the inner drill rod and the outer drill rod respectively.

[0004] While using two hydraulic motors allows for independent driving of the inner and outer drill rods, the two motors result in a heavier dual-drive head and require higher driving power for reciprocating movement along the drill frame. Furthermore, the independent driving and control of the two hydraulic motors leads to a more complex hydraulic system for trenchless drilling rigs. Utility Model Content

[0005] The purpose of this utility model is:

[0006] This invention provides a single-motor clutch-type power head for trenchless drilling rigs. It improves the structure of dual-drive power heads, reducing two hydraulic motors to one while achieving both joint and separate drive of the inner and outer drill rods. This reduces the weight of the dual-drive power head and simplifies the hydraulic system of the trenchless drilling rig.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A single-motor clutch-type power head for trenchless drilling rigs includes a housing with a hydraulic motor mounted outside the housing; it also includes a splined shaft, a first splined gear, a second splined gear, a double splined sleeve, a pusher, an inner shaft, and an outer shaft; there is only one hydraulic motor, the splined shaft is located inside the housing and connected to the output end of the hydraulic motor, the first splined gear is located on the splined shaft, both the inner and outer shafts are rotatably connected to the housing, and the inner shaft is located inside the outer shaft; the inner shaft is driven by an inner drive gear to the first splined gear; the second splined gear is rotatably connected to the housing, the double splined sleeve is movably mounted on the splined shaft, the pusher can drive the double splined sleeve to move along the splined shaft to engage or disengage the second splined gear, and the outer shaft is driven by an outer drive gear to the second splined gear.

[0009] Furthermore, the spline shaft, the first spline gear, the second spline gear, and the double spline sleeve are all coaxially arranged; the double spline sleeve has an engaged state that engages with the second spline gear, and a disengaged state that disengages from the second spline gear.

[0010] Furthermore, the double spline sleeve has an inner ring spline inside and an outer ring spline outside; the inner ring spline engages with the first spline gear, and the outer ring spline engages with the inner side of the gear portion of the second spline gear.

[0011] Furthermore, the second splined gear includes a shaft sleeve, which is rotatably connected to the housing. The gear portion is located at one end of the shaft sleeve, and a relief groove is provided at the center of the gear portion. A spline is provided on the inner wall of the relief groove.

[0012] Furthermore, the outer ring spline is provided with a pointed guide on the side facing the second spline gear, so that when the double spline sleeve moves toward the second spline gear, the outer ring spline engages with the spline on the inner wall of the relief groove.

[0013] Furthermore, the pusher is located inside the housing and is driven by a hydraulic cylinder; the piston rod of the hydraulic cylinder is connected to the pusher; the pusher is rotatably connected to the double spline sleeve via a bearing, and both the double spline sleeve and the spline shaft pass through the central hole of the pusher.

[0014] Furthermore, the pusher is located between the first splined gear and the second splined gear, a guide rod is provided inside the housing, and the pusher is movably mounted on the guide rod; the piston rod of the hydraulic cylinder is parallel to the axial direction of the splined shaft.

[0015] Furthermore, the inner shaft is rotatably connected to the housing and the inner wall of the outer shaft via a first bevel gear, the inner drive gear is coaxially arranged with the inner shaft, and the inner drive gear meshes with the outer periphery of the first spline gear.

[0016] Furthermore, the outer shaft is rotatably connected to the housing and the partition plate inside the housing via a second bevel gear. The outer drive gear is coaxially arranged with the outer shaft and meshes with the outer periphery of the second spline gear.

[0017] The beneficial effects of this utility model are as follows:

[0018] A single-motor clutch-type power head for trenchless drilling rigs improves the structure of dual-drive power heads. While enabling both joint and separate driving of the inner and outer drill rods, a clutch structure is added. Through the coordinated action of a splined shaft, first splined gear, second splined gear, double splined sleeve, push frame, hydraulic cylinder, inner drive gear, inner shaft, outer drive gear, and outer shaft, two hydraulic motors are reduced to one. This means that a single hydraulic motor can achieve both joint and separate driving of the inner and outer shafts, thereby reducing the weight of the dual-drive power head and consequently reducing the driving power required for the reciprocating movement of the dual-drive power head along the drill frame. Simultaneously, it simplifies the hydraulic system of the trenchless drilling rig. Attached Figure Description

[0019] Figure 1 This is a three-dimensional view of the overall structure of a single-motor clutch-type power head for a trenchless drilling rig according to this utility model.

[0020] Figure 2 This is a partial structural diagram of a single-motor clutch-type power head for a trenchless drilling rig according to the present invention.

[0021] Figure 3 This is a schematic diagram of the clutch structure of a single-motor clutch-type power head for a trenchless drilling rig according to this utility model.

[0022] Figure 4 This is a schematic diagram of the pusher structure of a single-motor clutch-type power head for a trenchless drilling rig according to the present invention.

[0023] Figure 5 This is a schematic diagram of the second spline gear structure of a single-motor clutch-type power head for a trenchless drilling rig according to the present invention.

[0024] Figure 6 This is a schematic diagram of the double spline sleeve structure of a single-motor clutch-type power head for a trenchless drilling rig according to the present invention.

[0025] Figure 7 This is a schematic diagram of the lower structure of a single-motor clutch-type power head for a trenchless drilling rig according to the present invention.

[0026] The attached figures are labeled as follows:

[0027] 1. Housing; 2. Hydraulic motor; 3. Splined shaft; 4. First splined gear; 5. Second splined gear; 51. Gear section; 52. Relief groove; 53. Shaft sleeve; 6. Double splined sleeve; 61. Inner ring spline; 62. Outer ring spline; 63. Sharp corner guide; 7. Push frame; 8. Hydraulic cylinder; 9. Guide rod; 10. Internal drive gear; 11. Inner shaft; 12. External drive gear; 13. External shaft; 14. Partition plate. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0029] refer to Figures 1 to 7 A single-motor clutch-type power head for trenchless drilling rigs includes a housing 1, with a hydraulic motor 2 installed outside the housing 1; the drill frame of the trenchless drilling rig is equipped with a dual-drive head for driving the inner and outer drill rods.

[0030] The aforementioned trenchless drilling rig single-motor clutch power head also includes a splined shaft 3, a first splined gear 4, a second splined gear 5, a double splined sleeve 6, a pusher 7, an inner shaft 11, and an outer shaft 13.

[0031] There is only one hydraulic motor 2, which is different from the existing dual drive head with two hydraulic motors.

[0032] Spline shaft 3 is located inside housing 1 and connected to the output end of hydraulic motor 2. The output end of hydraulic motor 2 drives spline shaft 3 to rotate. First spline gear 4 is located on spline shaft 3 and rotates synchronously with spline shaft 3.

[0033] Both the inner shaft 11 and the outer shaft 13 are rotatably connected to the housing 1, with the inner shaft 11 located inside the outer shaft 13. The inner shaft 11 is used to drive the inner drill rod, and the outer shaft 13 is used to drive the outer drill rod.

[0034] The inner shaft 11 is connected to the first spline gear 4 via the inner drive gear 10; the first spline gear 4 drives the inner drive gear 10 to rotate, which in turn drives the inner shaft 11 to rotate, and in turn drives the inner drill rod to rotate.

[0035] The second splined gear 5 is rotatably connected to the housing 1. The double splined sleeve 6 is movably mounted on the splined shaft 3. The pusher 7 can drive the double splined sleeve 6 to move along the splined shaft 3 to engage or disengage from the second splined gear 5. The outer shaft 13 is connected to the second splined gear 5 via the outer drive gear 12. The pusher 7 drives the double splined sleeve 6 to move along the splined shaft 3, so that the double splined sleeve 6 engages with the second splined gear 5. The second splined gear 5 drives the outer drive gear 12 to rotate, thereby driving the outer shaft 13 and finally realizing the driving of the outer drill rod.

[0036] The spline shaft 3, the first spline gear 4, the second spline gear 5, and the double spline sleeve 6 are all coaxially arranged. The double spline sleeve 6 has an engaged state where it is engaged with the second spline gear 5, and a disengaged state where it is disengaged from the second spline gear 5. When in the engaged state, the second spline gear 5 rotates together with the spline sleeve 6; when in the disengaged state, the spline sleeve 6 does not drive the second spline gear 5 to rotate.

[0037] The double spline sleeve 6 has an inner ring spline 61 inside and an outer ring spline 62 outside. The inner ring spline 61 cooperates with the first spline gear 4 to enable the double spline sleeve 6 to rotate together with the first spline gear 4. The outer ring spline 62 can cooperate with the inner side of the gear part 51 of the second spline gear 5 to drive the second spline gear 5 to rotate in the engaged state.

[0038] The second spline gear 5 includes a shaft sleeve 53, which is rotatably connected to the housing 1. The shaft sleeve 53 is rotatably connected to the housing through a bearing. The gear part 51 is located at one end of the shaft sleeve. A clearance groove 52 is provided at the center of the gear part 51. A spline is provided on the inner wall of the clearance groove 52. The clearance groove 52 is used to avoid misalignment.

[0039] The outer ring spline 62 is provided with a sharp corner guide 63 on the side facing the second spline gear 5, so that when the double spline sleeve 6 moves toward the second spline gear 5, the outer ring spline 62 can engage with the spline on the inner wall of the relief groove 52; the sharp corner guide 63 has a sharp cone-shaped structure and is used to guide and ensure smooth engagement.

[0040] The pusher 7 is located inside the housing 1 and is driven by the hydraulic cylinder 8; the piston rod of the hydraulic cylinder 8 is connected to the pusher 7; the pusher 7 is rotatably connected to the double spline sleeve 6 through the bearing, and the double spline sleeve 6 and the spline shaft 3 both pass through the center hole of the pusher 7. The pusher 7 can drive the double spline sleeve 6 around the entire circle and the force is uniform.

[0041] The pusher 7 is located between the first spline gear 4 and the second spline gear 5. A guide rod 9 is provided inside the housing 1, and the pusher 7 is movably mounted on the guide rod 9. The piston rod of the hydraulic cylinder 8 is parallel to the axial direction of the spline shaft 3, and the hydraulic cylinder 8 can drive the pusher 7 to reciprocate along the guide rod 9.

[0042] The inner shaft 11 is rotatably connected to the housing 1 and the inner wall of the outer shaft 13 via the first bevel gear. The first bevel gear can withstand radial force. The inner drive gear 10 is coaxially arranged with the inner shaft 11 and meshes with the outer circumference of the first spline gear 4.

[0043] The outer shaft 13 is rotatably connected to the housing 1 and the partition plate 14 inside the housing 1 via the second bevel gear. The second bevel gear can withstand radial force. The outer drive gear 12 is coaxially arranged with the outer shaft 13 and meshes with the outer periphery of the second spline gear 5. The partition plate 14 is used to separate the outer drive gear 12 and the inner drive gear 10, and the partition plate 14 is used to place the second bevel gear.

[0044] The working principle of this utility model is as follows:

[0045] When the inner and outer drill rods need to rotate synchronously, the piston rod of the cylinder 8 in the housing 1 retracts, driving the pusher 7 to move along the guide rod 9 toward the second spline gear 5. At this time, the pusher 7 drives the double spline sleeve 6 to move along the spline shaft 3 toward the second spline gear 5 through the bearing, until the outer ring spline 62 of the double spline sleeve 6 engages with the spline in the relief groove 52 of the second spline gear 5, thus realizing the engagement of the double spline sleeve 6 and the second spline gear 5.

[0046] In the engaged state, the power of the hydraulic motor 2 drives the first spline gear 4 via the spline shaft 3, and drives the second spline gear 5 via the spline shaft 3 and the double spline sleeve 6. The first spline gear 4 drives the inner drive gear 10 to rotate, which in turn drives the inner shaft 11 to rotate, and then drives the inner drill rod to rotate. The second spline gear 5 drives the outer drive gear 12 to rotate, which in turn drives the outer shaft 13 to rotate, and then drives the outer drill rod to rotate.

[0047] When the inner and outer drill rods do not need to rotate synchronously, the piston rod of the cylinder 8 in the housing 1 extends and drives the pusher 7 to move along the guide rod 9 toward the first spline gear 4. At this time, the pusher 7 drives the double spline sleeve 6 to move along the spline shaft 3 toward the first spline gear 4 through the bearing until the outer ring spline 62 of the double spline sleeve 6 disengages from the spline in the relief groove 52 of the second spline gear 5, thereby disengaging the double spline sleeve 6 from the second spline gear 5.

[0048] In the disengaged state, the power of the hydraulic motor 2 drives the first spline gear 4 via the spline shaft 3. The first spline gear 4 drives the inner drive gear 10 to rotate, which in turn drives the inner shaft 11 to rotate, and then drives the inner drill rod to rotate. The power of the hydraulic motor 2 drives the double spline sleeve 6 to rotate via the spline shaft 3, but because it is disengaged, it cannot drive the second spline gear 5. Therefore, it cannot drive the outer drive gear 12 to rotate, and thus cannot drive the outer shaft 13 and the outer drill rod to rotate, thus achieving clutch control.

[0049] The above embodiments are used to further illustrate the present invention, but do not limit the present invention to these specific embodiments. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be understood as being within the protection scope of the present invention.

Claims

1. A trenchless drilling rig single-motor clutch type power head, comprising a box (1), the outside of which is provided with a hydraulic motor (2); characterized in that: It also includes a splined shaft (3), a first splined gear (4), a second splined gear (5), a double splined sleeve (6), a pusher (7), an inner shaft (11), and an outer shaft (13); there is only one hydraulic motor (2), the splined shaft (3) is located inside the housing (1) and connected to the output end of the hydraulic motor (2), the first splined gear (4) is located on the splined shaft (3), and both the inner shaft (11) and the outer shaft (13) are rotatably connected to the housing (1), and the inner shaft (11) Located inside the outer shaft (13); the inner shaft (11) is connected to the first spline gear (4) via the inner drive gear (10); the second spline gear (5) is rotatably connected to the housing (1); the double spline sleeve (6) is movably mounted on the spline shaft (3); the pusher (7) can drive the double spline sleeve (6) to move along the spline shaft (3) to engage or disengage from the second spline gear (5); the outer shaft (13) is connected to the second spline gear (5) via the outer drive gear (12).

2. A trenchless drill single motor clutch type power head according to claim 1, characterized in that: The spline shaft (3), the first spline gear (4), the second spline gear (5) and the double spline sleeve (6) are all coaxially arranged; the double spline sleeve (6) has an engaged state that engages with the second spline gear (5) and a disengaged state that disengages from the second spline gear (5).

3. A trenchless drill single motor clutch type powerhead as claimed in claim 2, characterized in that: The double spline sleeve (6) has an inner ring spline (61) inside and an outer ring spline (62) outside; the inner ring spline (61) is engaged with the first spline gear (4), and the outer ring spline (62) is engaged with the inner side of the gear part (51) of the second spline gear (5).

4. A trenchless drill single motor clutch type powerhead as claimed in claim 3, characterized in that: The second spline gear (5) includes a shaft sleeve (53), which is rotatably connected to the housing (1). The gear part (51) is located at one end of the shaft sleeve. A relief groove (52) is provided in the center of the gear part (51), and a spline is provided on the inner wall of the relief groove (52).

5. A trenchless drill single motor clutch type powerhead as claimed in claim 4, wherein: The outer ring spline (62) is provided with a sharp corner guide (63) on the side facing the second spline gear (5), so that when the double spline sleeve (6) moves toward the second spline gear (5), the outer ring spline (62) is engaged with the spline on the inner wall of the relief groove (52).

6. A single motor clutch type powerhead for trenchless drilling machines according to any one of claims 1-5, characterized in that: The pusher (7) is located inside the housing (1) and is driven by the oil cylinder (8); the piston rod of the oil cylinder (8) is connected to the pusher (7); the pusher (7) is rotatably connected to the double spline sleeve (6) through the bearing, and the double spline sleeve (6) and the spline shaft (3) both pass through the center hole of the pusher (7).

7. A single-motor clutch-type power head for trenchless drilling rigs according to claim 6, characterized in that: The pusher (7) is located between the first spline gear (4) and the second spline gear (5). A guide rod (9) is provided inside the housing (1). The pusher (7) is movably mounted on the guide rod (9). The piston rod of the oil cylinder (8) is parallel to the axial direction of the spline shaft (3).

8. A single-motor clutch-type power head for trenchless drilling rigs according to claim 6, characterized in that: The inner shaft (11) is rotatably connected to the inner wall of the housing (1) and the outer shaft (13) via the first bevel gear. The inner drive gear (10) is coaxially arranged with the inner shaft (11) and meshes with the outer periphery of the first spline gear (4).

9. A single-motor clutch-type power head for trenchless drilling rigs according to claim 6, characterized in that: The outer shaft (13) is rotatably connected to the housing (1) and the partition plate (14) inside the housing (1) via the second bevel gear. The outer drive gear (12) is coaxially arranged with the outer shaft (13), and the outer drive gear (12) meshes with the outer periphery of the second spline gear (5).

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