A rotary clutch drive structure for drilling rigs

Abstract

This utility model relates to a toggle-type clutch drive structure for drilling rigs, including a transmission box, a motor, a first transmission gear, a clutch sleeve, a shift plate, a hydraulic cylinder, and a second transmission gear. The motor is located on the transmission box, and the first transmission gear, clutch sleeve, shift plate, hydraulic cylinder, and second transmission gear are all located inside the transmission box. The motor's output shaft is provided with a splined shaft, and the first transmission gear is located on the splined shaft and splinedly connected to the splined shaft. The clutch sleeve is rotatably connected to the shift plate via a bearing, and the shift plate is connected to the piston rod of the hydraulic cylinder. The clutch sleeve is slidably splinedly connected to the splined shaft. The hydraulic cylinder drives the shift plate to move, causing the clutch sleeve to slide along the splined shaft, so that the clutch sleeve engages or disengages from the second transmission gear. This utility model, a toggle-type clutch drive structure for drilling rigs, simplifies existing clutch shifting structures, reduces costs, saves space, and can be applied in the power head of drilling rigs.

Description

Technical Field

[0001] This utility model relates to a clutch structure, specifically a rotary clutch drive structure for drilling rigs. Background Technology

[0002] Trenchless drilling rigs are typically used for drilling operations without excavation of the ground surface. The structure of a trenchless drilling rig usually includes a tracked chassis, drill frame, traveling trolley, power head, and operator's cab. The power head drives the forward and reverse rotation of the drill rod and can achieve independent rotation of the inner and outer cylinders of the drill rod.

[0003] The existing trenchless drilling rigs use a coaxial drive for the inner rod and outer cylinder of the drill rod, and these are driven independently. Each drive for the inner rod and outer cylinder corresponds to a set of hydraulic motors.

[0004] If a clutch shifting structure is adopted to enable a single motor to drive the inner rod and outer cylinder of the drill rod separately, the existing clutch shifting structure is complex, costly, and requires a large space, making it difficult to apply in the confined space of the power head. Utility Model Content

[0005] The purpose of this utility model is:

[0006] Design a toggle-type clutch drive structure for drilling rigs. A toggle-type clutch structure is designed between the motor of the power head and the second transmission gear to realize the power transmission and disconnection of the second transmission gear. This simplifies the existing clutch shifting structure, reduces costs, saves space, and can be applied in the power head of drilling rigs.

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

[0008] A rotary clutch drive structure for drilling rigs includes a transmission box, a motor, a first transmission gear, a clutch sleeve, a shift plate, a hydraulic cylinder, and a second transmission gear. The motor is located on the transmission box, and the first transmission gear, clutch sleeve, shift plate, hydraulic cylinder, and second transmission gear are all located inside the transmission box. The output shaft of the motor is provided with a spline shaft, and the first transmission gear is located on the spline shaft and splinedly connected to the spline shaft. The clutch sleeve is rotatably connected to the shift plate via a bearing, and the shift plate is connected to the piston rod of the hydraulic cylinder. The clutch sleeve is slidably splinedly connected to the spline shaft. The hydraulic cylinder drives the shift plate to move, causing the clutch sleeve to slide along the spline shaft, so that the clutch sleeve engages or disengages from the second transmission gear.

[0009] Furthermore, the rotation axis of the clutch sleeve is coaxial with the spline shaft; the first transmission gear is located between the motor and the second transmission gear; the clutch sleeve is located on the spline shaft near the second transmission gear.

[0010] Furthermore, the clutch sleeve includes a cylinder, a first internal spline, and an external spline; the first internal spline is located inside the cylinder and is slidably spline-connected to the spline shaft; the external spline is located outside the cylinder and can engage with the second transmission gear for synchronous rotation.

[0011] Furthermore, the cylinder body is also provided with a slot; the inner ring of the bearing is located in the slot, and the outer ring of the bearing is located in the through hole on the dial plate.

[0012] Furthermore, the second transmission gear includes gear teeth and a second internal spline; the second internal spline is located inside the second transmission gear and can be engaged with the external spline of the clutch sleeve to form a joint, so that the second transmission gear and the clutch sleeve rotate synchronously.

[0013] Furthermore, the second transmission gear also includes an extension cylinder; the extension cylinder is rotatably connected to the transmission box.

[0014] Furthermore, a guide rod is also provided inside the transmission box, and the lever is movably connected to the guide rod through a sliding sleeve; the axis of the guide rod is parallel to the axis of the spline shaft.

[0015] Furthermore, a spring is provided on the outer sleeve of the guide rod. The spring is located on the side of the lever plate away from the hydraulic cylinder, and the two ends of the spring are connected to the inner wall of the transmission box and the side wall of the lever plate, respectively.

[0016] The beneficial effects of this utility model are as follows:

[0017] A rotary clutch drive structure for drilling rigs improves the internal structure of the power head by adding a clutch structure between the motor and the second transmission gear. This structure includes a splined shaft, clutch sleeve, lever plate, guide rod, hydraulic cylinder, and the second transmission gear. The hydraulic cylinder drives the lever plate to move along the guide rod, causing the clutch sleeve to engage or disengage from the second transmission gear. This enables the motor to transmit and disconnect power to the second transmission gear, simplifying existing clutch shifting structures, reducing costs, and saving space. It can be applied to the power head of drilling rigs. Attached Figure Description

[0018] Figure 1 This is a three-dimensional view of the overall structure of a rotary clutch drive structure for drilling rigs according to the present invention.

[0019] Figure 2 This is a partial structural cross-sectional view of a rotary clutch drive structure for drilling rigs according to this utility model.

[0020] Figure 3 for Figure 2 A partial structural diagram of the structure shown.

[0021] Figure 4 for Figure 3 A partial structural diagram of the structure shown.

[0022] Figure 5 This is a schematic diagram of the clutch sleeve structure of a rotary clutch drive structure for drilling rigs according to this utility model.

[0023] Figure 6 for Figure 3 Another structural diagram of the structure shown.

[0024] Figure 7 for Figure 2 Another structural diagram of the structure shown.

[0025] Figure 8 for Figure 7 A schematic diagram of the structure shown from another perspective.

[0026] The attached figures are labeled as follows:

[0027] 1. Transmission box; 2. Motor; 3. Splined shaft; 6. Clutch sleeve; 61. Cylinder body; 62. First internal spline; 63. External spline; 64. Slot; 7. Dial plate; 8. Bearing; 9. Guide rod; 10. Spring; 11. Hydraulic cylinder; 12. Second transmission gear; 121. Gear tooth; 122. Second internal spline; 123. Extension cylinder. 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 8 A toggle-type clutch drive structure for drilling rigs is located on the power head of a trenchless drilling rig, including a transmission box 1, a motor 2, a clutch sleeve 6, a toggle plate 7, a hydraulic cylinder 11, and a second transmission gear 12; the motor 2 is specifically a hydraulic motor, which is connected to the hydraulic system pipeline of the trenchless drilling rig, and the hydraulic oil is supplied by the oil pump of the trenchless drilling rig.

[0030] Motor 2 is located on transmission box 1, and clutch sleeve 6, shift plate 7, hydraulic cylinder 11 and second transmission gear 12 are all located inside transmission box 1; transmission box 1 is located on the traveling trolley on the drill frame of trenchless drilling rig.

[0031] The output shaft of motor 2 is equipped with a splined shaft 3; motor 2 is used to drive splined shaft 3. Splined shaft 3 is coaxially connected to the output shaft of motor 2.

[0032] The clutch sleeve 6 is rotatably connected to the shift plate 7 via the bearing 8, and the shift plate 7 is connected to the piston rod of the hydraulic cylinder 11; the hydraulic cylinder 11 is used to drive the shift plate 7 to slide back and forth. The clutch sleeve 6 can rotate relative to the shift plate 7.

[0033] The clutch sleeve 6 is slidably splinedly connected to the splined shaft 3; the clutch sleeve 6 can slide axially relative to the splined shaft 3.

[0034] The hydraulic cylinder 11 drives the lever 7 to move, causing the clutch sleeve 6 to slide along the spline shaft 3, so that the clutch sleeve 6 engages or disengages from the second transmission gear 12, thereby realizing the power transmission of the motor 2 to the second transmission gear 12 or disconnection.

[0035] The rotation axis of the clutch sleeve 6 is the same as that of the spline shaft 3; the clutch sleeve 6 is located near the second transmission gear 12 of the spline shaft 3, and the clutch sleeve 6 rotates synchronously with the spline shaft 63.

[0036] The clutch sleeve 6 includes a cylinder 61, a first inner spline 62 and an outer spline 63; the clutch sleeve 6 is a one-piece molded structure.

[0037] The first internal spline 62 is located inside the cylinder 61. The first internal spline 62 is arranged around the entire circumference of the inner side of the cylinder 61, and the first internal spline 62 is slidably spline-connected to the spline shaft 3; the first internal spline 62 meshes with the spline shaft 3.

[0038] The external spline 63 is located on the outside of the cylinder 61. The external spline 63 is arranged around the entire circumference of the outside of the cylinder 61, and the external spline 63 can engage with the second transmission gear 12 to rotate synchronously.

[0039] The cylinder 61 is also provided with a slot 64; the inner ring of the bearing 8 is located in the slot 64, the outer ring of the bearing 8 is located in the through hole on the dial plate 7, the bearing 8 is sleeved on the outer periphery of the cylinder 61, and the movement of the dial plate 7 further drives the cylinder 61 to slide through the bearing 8.

[0040] The second transmission gear 12 includes gear teeth 121 and a second internal spline 122; the second transmission gear 12 is an integrally formed structure.

[0041] The second internal spline 122 is located inside the second transmission gear 12. The second internal spline 122 can be inserted into the outer spline 63 of the clutch sleeve 6 to form a joint, so that the second transmission gear 12 and the clutch sleeve 6 rotate synchronously.

[0042] The second transmission gear 12 also includes an extension cylinder 123; the extension cylinder 123 is rotatably connected to the transmission box 1, and the gear tooth 121 is rotatably connected to the extension cylinder 123, thereby realizing the positioning and support of the gear tooth 121.

[0043] The transmission box 1 is also equipped with a guide rod 9. The lever 7 is movably connected to the guide rod 9 through a sliding sleeve. The guide rod 9 is used to guide the reciprocating sliding of the lever 7. The axis of the guide rod 9 is parallel to the axis of the spline shaft 3.

[0044] A spring 10 is fitted around the guide rod 9. The spring 10 is located on the side of the lever 7 away from the hydraulic cylinder 11. The two ends of the spring 10 are connected to the inner wall of the transmission box 1 and the side wall of the lever 7, respectively. The spring 10 is specifically a helical spring, used to elastically support the clutch sleeve 6.

[0045] The working principle of this utility model is as follows:

[0046] When the inner rod of the drill pipe needs to be rotated, the power of the motor 2 needs to be transmitted to the second transmission gear 12. The piston rods of the two hydraulic cylinders 11 retract, driving the lever 7 to slide along the guide rod 9 toward the second transmission gear 12. The lever 7 drives the clutch sleeve 6 to slide toward the second transmission gear 12 through the bearing 10.

[0047] As the clutch sleeve 6 slides toward the second transmission gear 12, the outer spline 63 of the clutch sleeve 6 meshes with the second inner spline 122 of the second transmission gear 12, creating an anti-rotation engagement between the clutch sleeve 6 and the second transmission gear 12. At this time, the motor 2 drives the spline shaft 3 to rotate, and the spline shaft 3 drives the second transmission gear 12 to rotate through the clutch sleeve 6, thus realizing the driving end of the inner rod.

[0048] When the rotation of the inner rod of the drill pipe is not required, the power of the motor 2 needs to be disengaged from the second transmission gear 12. The piston rods of the two hydraulic cylinders 11 extend, driving the lever 7 to slide along the guide rod 9 in a direction away from the second transmission gear 12. The lever 7 drives the clutch sleeve 6 to slide in a direction away from the second transmission gear 12 through the bearing 10.

[0049] As the clutch sleeve 6 slides away from the second transmission gear 12, the outer spline 63 of the clutch sleeve 6 disengages from the second inner spline 122 of the second transmission gear 12, thus separating the clutch sleeve 6 from the second transmission gear 12. At this time, the motor 2 drives the spline shaft 3 to rotate, and the spline shaft 3 can no longer drive the second transmission gear 12 to rotate through the clutch sleeve 6, thereby cutting off the drive to the drive end of the inner rod.

[0050] 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 rotary clutch drive structure for drilling rigs, characterized in that: The system includes a transmission box (1), a motor (2), a clutch sleeve (6), a shift plate (7), a hydraulic cylinder (11), and a second transmission gear (12). The motor (2) is located on the transmission box (1), and the clutch sleeve (6), shift plate (7), hydraulic cylinder (11), and second transmission gear (12) are all located inside the transmission box (1). The output shaft of the motor (2) is provided with a spline shaft (3). The clutch sleeve (6) is rotatably connected to the shift plate (7) through a bearing (8), and the shift plate (7) is connected to the piston rod of the hydraulic cylinder (11). The clutch sleeve (6) is slidably splinedly connected to the spline shaft (3). The hydraulic cylinder (11) drives the shift plate (7) to move, causing the clutch sleeve (6) to slide along the spline shaft (3), so that the clutch sleeve (6) engages or disengages from the second transmission gear (12).

2. The actuated clutch drive structure for drilling rigs according to claim 1, characterized in that: The rotation axis of the clutch sleeve (6) is the same as that of the spline shaft (3); the clutch sleeve (6) is located on the spline shaft (3) near the second transmission gear (12).

3. The actuated clutch drive structure for drilling rigs according to claim 2, characterized in that: The clutch sleeve (6) includes a cylinder (61), a first internal spline (62) and an external spline (63); the first internal spline (62) is located inside the cylinder (61) and is slidably spline-connected to the spline shaft (3); the external spline (63) is located outside the cylinder (61) and can engage with the second transmission gear (12) to rotate synchronously.

4. The actuated clutch drive structure for drilling rigs according to claim 3, characterized in that: The cylinder (61) is also provided with a slot (64); the inner ring of the bearing (8) is located in the slot (64), and the outer ring of the bearing (8) is located in the through hole on the dial plate (7).

5. The actuated clutch drive structure for drilling rigs according to claim 3, characterized in that: The second transmission gear (12) includes gear teeth (121) and a second internal spline (122); the second internal spline (122) is located inside the second transmission gear (12), and the second internal spline (122) can be inserted into the external spline (63) of the clutch sleeve (6) to form a engagement, so that the second transmission gear (12) and the clutch sleeve (6) rotate synchronously.

6. The actuated clutch drive structure for drilling rigs according to claim 5, characterized in that: The second transmission gear (12) also includes an extension cylinder (123); the extension cylinder (123) is rotatably connected to the transmission box (1).

7. The actuated clutch drive structure for drilling rigs according to claim 1, characterized in that: The transmission box (1) is also provided with a guide rod (9), and the lever (7) is movably connected to the guide rod (9) through a sliding sleeve; the axis of the guide rod (9) is parallel to the axis of the spline shaft (3).

8. The actuated clutch drive structure for drilling rigs according to claim 7, characterized in that: A spring (10) is provided around the guide rod (9). The spring (10) is located on the side of the lever (7) away from the hydraulic cylinder (11). The two ends of the spring (10) are respectively connected to the inner wall of the transmission box (1) and the side wall of the lever (7).

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