A clutch assembly for a drilling rig

Abstract

The utility model relates to clutch assembly device technical field, concretely is a kind of clutch assembly for drilling machine, including the output shaft and water pipe joint of the front end of drilling machine, output shaft is used to be fixedly connected with drill bit matching, water pipe joint is fixed with water pipe, and the middle part of drilling machine is provided with gear switch, gear switch changes the state of clutch assembly by gear knob driving gear pull fork, clutch assembly is power connected with driving assembly, and driving assembly is used to drive output shaft output power.The utility model can realize three gear variable speed high efficiency, reliable oil leakage prevention seal, compact structure, maintenance is convenient, dismounting is simple, power transmission loss is low and low cost high compatibility, standard gear and shafting structure can be directly adapted to existing drilling machine production line, without reforming core component, industrialization landing speed is fast.

Description

Technical Field

[0001] This utility model relates to the technical field of clutch assembly devices, specifically a clutch assembly for drilling rigs. Background Technology

[0002] A clutch assembly typically includes the following components: pressure plate, friction plates, release bearing, etc. These components play important roles in the normal operation of the clutch. The pressure plate is responsible for pressing the friction plates tightly against the flywheel to transmit power. The friction plates are the parts that directly contact the flywheel and transmit power through friction. The release bearing reduces the friction between the pressure plate and the friction plates when the clutch disengages, allowing the clutch to smoothly disengage and engage. In addition, depending on the type of clutch, other components may also be included, such as the electromagnetic coil in an electromagnetic clutch, and the pump wheel and turbine in a hydraulic clutch.

[0003] During the use of drilling rigs, the rotation speed or amplitude needs to be changed at any time. Therefore, a suitable clutch needs to be installed inside to effectively adjust the rotation speed. However, due to the different types of drilling rigs, the required clutch size is different, and the design style of the clutch varies. Utility Model Content

[0004] The purpose of this invention is to provide a clutch assembly for drilling rigs to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a clutch assembly for a drilling rig, comprising a drilling rig, the drilling rig including an output shaft at the front end and a water pipe connector, the output shaft being used for fixed connection with a drill bit, the water pipe connector being fixed to a water pipe, and a gear switch being provided in the middle of the drilling rig, the gear switch driving a gear shift fork through a gear knob to change the state of the clutch assembly, the clutch assembly being poweredly connected to a drive assembly, the drive assembly being used to drive the output shaft to output power.

[0006] Preferably, the drilling rig is internally equipped with a brushless controller, a capacitor, and a motor for controlling the operation of the drilling rig, the motor being composed of a stator and a rotor assembly.

[0007] Preferably, the gear position switch is connected to the gear position shift fork via a knob to control the movement of the gear position shift fork, and the output end of the gear position shift fork is connected to the clutch assembly.

[0008] Preferably, the drive assembly includes an output shaft, a first spur gear, a flat key, a sliding tooth, and a second spur gear, wherein the first spur gear, the flat key, the sliding tooth, and the second spur gear are sequentially sleeved on the output shaft.

[0009] Preferably, a keyway is provided on the output shaft, the flat key is located in the keyway, and the sliding teeth are sleeved on the flat key.

[0010] Preferably, the second spur gear is sleeved on the output shaft and located on one side of the sliding gear, and the second spur gear contacts and connects to the sliding gear and controls the movement of the sliding gear.

[0011] Preferably, the clutch assembly is meshed with a second spur gear, which drives the second spur gear through the gear, and then the second spur gear drives the sliding shifter to control the output gear of the motor.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] Three-speed transmission for high efficiency and stability: The meshing design of the sliding teeth and the three-tooth linkage allows for switching between three transmission ratios with a single axial slide, significantly improving drilling efficiency and adaptability to different working conditions.

[0014] The key and keyway work together to ensure zero slippage in power transmission, avoiding the wear problems of traditional friction clutches.

[0015] Reliable oil leak prevention and sealing: The O-ring is embedded in the knob groove, effectively blocking the leakage path of lubricating oil, extending equipment life and reducing maintenance costs.

[0016] Compact structure and easy maintenance: The clutch assembly adopts a modular design (nut / disc spring / copper friction plate, etc.), making disassembly and assembly simple; the copper friction plate is resistant to high temperature and wear, reducing replacement frequency. The cylindrical pin fixing method between the gear shift fork and the knob ensures precise mechanical linkage and resistance to vibration and misalignment.

[0017] Low power transmission loss: The meshing transmission of helical gears and spur gears, combined with brushless motor control, improves energy conversion efficiency by ≥15% and reduces ineffective power consumption.

[0018] Low cost and high compatibility: The standard gear and shaft structure can be directly adapted to existing drilling rig production lines without the need to modify core components, enabling rapid industrialization. Attached Figure Description

[0019] Figure 1 This is a side view of the present invention.

[0020] Figure 2 This is a cross-sectional view of the present invention.

[0021] Figure 3 This is a side view of the clutch assembly of this utility model.

[0022] Figure 4 This is a cross-sectional view of the clutch and output shaft of this utility model.

[0023] In the diagram: Drilling rig 1, brushless controller 11, capacitor 12, rotor assembly 13, stator 14, gear switch 2, gear shift fork 21, output shaft 3, water pipe connector 4, clutch assembly 5, drive assembly 6, output shaft 61, first spur gear 62, flat key 63, sliding gear 64, second spur gear 65. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1 to 4 This utility model provides a technical solution:

[0026] refer to Figure 1 A clutch assembly for a drilling rig includes a drilling rig 1. The drilling rig 1 includes an output shaft 3 at the front end and a water pipe connector 4. The output shaft 3 is used to be fixedly connected to a drill bit. The water pipe connector 4 is fixed to a water pipe. A gear switch 2 is provided in the middle of the drilling rig 1. The gear switch 2 drives a gear shift fork through a gear knob to change the state of the clutch assembly 5. The clutch assembly 5 is poweredly connected to a drive assembly 6. The drive assembly 6 is used to drive the output shaft 3 to output power.

[0027] The drilling rig 1 is internally equipped with a brushless controller 11, a capacitor 12 and a motor for controlling the operation of the drilling rig 1. The motor consists of a stator 14 and a rotor assembly 13.

[0028] The gear position switch 2 is connected to the gear position fork 21 via a knob to control the movement of the gear position fork 21. The output end of the gear position fork 21 is connected to the clutch assembly 5.

[0029] The drive assembly 6 includes an output shaft 61, a first spur gear 62, a flat key 63, a sliding tooth 64, and a second spur gear 65, which are sequentially sleeved on the output shaft 61.

[0030] A keyway is provided on the output shaft 61, a flat key 63 is located in the keyway, and a sliding tooth 64 is sleeved on the flat key 63.

[0031] The second spur gear 65 is sleeved on the output shaft 61 and located on one side of the sliding tooth 64. The second spur gear 65 contacts and connects to the sliding tooth 64 and controls the movement of the sliding tooth 64.

[0032] The clutch assembly 5 is engaged with the second spur gear 65. The clutch assembly 5 drives the second spur gear 65 through the gear, and then the second spur gear 65 drives the sliding shift tooth 64 to control the output gear of the motor.

[0033] This utility model relates to a clutch assembly for drilling rigs, particularly suitable for multi-speed adjustable drilling rigs in fields such as geological exploration and construction. The following description is in conjunction with the accompanying drawings (…). Figures 1-4 The present invention will be described in detail below, and the same reference numerals in the accompanying drawings represent the same or similar parts.

[0034] like Figure 1 As shown, the drilling rig 1 has a long cylindrical shell structure, with an output shaft 3 and a water pipe connector 4 integrated at its front end. The output shaft 3 is fitted and fixed to the drill bit via threads or grooves, and the water pipe connector 4 uses a standard G1 / 2 threaded interface to connect to external cooling water pipes. A gear switch 2 is installed on the outer surface of the middle part of the drilling rig. The core of this switch is a rotatable gear knob (not labeled in the figure), which is fixed to a gear shift fork 21 by a cylindrical pin and screw to ensure that the two rotate synchronously. The output end of the shift fork 21 extends into the housing and is mechanically linked with the clutch assembly 5. The helical gear part of the clutch assembly 5 meshes with the second spur gear 65 of the drive assembly 6, and the drive assembly 6 ultimately transmits power to the output shaft 3.

[0035] Oil leakage prevention design: The O-ring made of fluororubber is embedded in the annular groove of the gear knob. After the knob is assembled with the housing, it forms a radial seal, effectively blocking the leakage path of lubricating oil. (See details) Figure 2 Cross-sectional view.

[0036] II. Detailed Explanation of the Core Transmission System

[0037] 1. Gear adjustment mechanism

[0038] When the user rotates the gear knob, the gear shift fork 21 rotates around the axis via the cylindrical pin.

[0039] The U-shaped end of the shift fork 21 is engaged in the annular groove of the sliding tooth 64, converting the rotational motion into the axial linear motion of the sliding tooth 64.

[0040] The sliding tooth 64 slides left and right along the axis of the output shaft 61, and its stroke is limited by the rotation angle of the shift fork 21, corresponding to three gear positioning points.

[0041] 2. Driver Component Structure

[0042] Drive assembly 6 includes the following components mounted coaxially:

[0043] Output shaft 61: Two parallel keyways with an axial length ≥ 50 mm are opened on the surface.

[0044] Flat key 63: Embedded in the keyway, with a length matching the keyway.

[0045] Sliding tooth 64: A keyway hole is opened in the center, and it is fitted onto the flat key 63 to achieve circumferential fixation and axial free sliding. Its right end face is machined with a three-tooth structure of low-speed teeth, medium-speed teeth and high-speed teeth.

[0046] The second spur gear 65 is mounted close to the left side of the sliding gear 64 and is connected to the output shaft 61 via a bearing. Its right end face has a boss that engages with the groove of the sliding gear 64 to transmit axial thrust.

[0047] First spur gear 62: Fixed to the left end of output shaft 61, and constantly meshed with the gear of motor rotor assembly 13.

[0048] 3. The clutch assembly is engaged. The clutch assembly 5 includes the following components pressed together from right to left:

[0049] Nuts: Used to tighten the entire assembly.

[0050] Disc springs: provide axial preload, with a preload force ≥200N.

[0051] Waist-shaped pad: to prevent uneven wear of the spring.

[0052] Helical gear: tooth angle 20°, constantly meshing with the second spur gear 65°.

[0053] Triple teeth: selectively mesh with the triple tooth structure of the sliding tooth 64.

[0054] Copper friction plate: made of sintered bronze, 3mm thick, which contacts the end face of the helical gear to transmit torque.

[0055] 4. Three-speed transmission implementation process

[0056] Low speed gear: Turn the knob to gear I → Shift fork 21 pushes sliding gear 64 to the right → Its low speed gear meshes with the left section of the clutch triple gear → Power path: motor → first spur gear 62 → output shaft 61 → flat key 63 → sliding gear 64 → clutch triple gear → helical gear → second spur gear 65 transmission ratio 1:5.2.

[0057] Medium speed gear: Turn the knob to gear II → Sliding tooth 64 is centered → Medium speed tooth meshes with the clutch middle gear → Power is directly transmitted to the clutch via sliding tooth 64 with a transmission ratio of 1:3.1.

[0058] High speed gear: Turn the knob to gear III → Sliding tooth 64 moves to the left → High speed gear meshes with the right section of the clutch → The boss of the second spur gear 65 pushes the sliding tooth 64 to achieve a hard connection transmission ratio of 1:1.8.

[0059] III. Electrical System Integration

[0060] Installation in the rear cavity of the drilling rig housing:

[0061] Brushless Controller 11: The PCB board integrates an IGBT module with a maximum output current of 30A.

[0062] Capacitor 12: Electrolytic capacitor bank with a total capacitance of 2200μF, used for filtering and voltage regulation.

[0063] Motor: The stator 14 is made of silicon steel sheets stacked together, and the rotor assembly 13 contains permanent magnet neodymium iron boron N52. The controller 11 realizes stepless speed regulation from 0 to 3000 rpm.

[0064] This utility model solves the pain points of traditional drilling rigs, such as speed change jamming, seal failure, and high energy consumption, through synergistic innovation in mechanical structure and control system:

[0065] Three-speed transmission offers quick response.

[0066] The axial meshing design of the sliding shift tooth 64 and the clutch triple tooth allows for gear shifting with only a single linear displacement (stroke ≤ 10mm), and the shifting time is < 0.5 seconds.

[0067] The flat key 63 fits the keyway in full circumference (with tolerance H7 / g6), eliminating power interruption under high-speed conditions and achieving a torque transmission efficiency of 98%.

[0068] Revolutionary improvement in sealing performance

[0069] The O-ring forms a double-lip seal in the knob groove, with an oil pressure resistance of ≥0.3MPa, reducing the leakage rate by 90% compared to traditional oil seals.

[0070] The constant clamping force of the disc spring 5 ensures that the copper friction plate is in close contact with the end face of the helical gear, preventing oil from seeping into the friction pair.

[0071] Lifespan and maintenance cost optimization

[0072] Copper friction pads are heat resistant up to 350℃, have a wear rate of ≤0.01mm / 100h, and a lifespan three times that of traditional resin friction pads.

[0073] The cylindrical pin locking structure between the gear shift fork 21 and the knob increases the vibration and displacement resistance by 200%, preventing gear misalignment due to loosening.

[0074] Precision energy efficiency control

[0075] The herringbone meshing of helical gears and spur gears (overlap ratio ε > 2.0) reduces noise to < 75 dB and transmission loss to < 5%.

[0076] The brushless controller 11 automatically matches the motor power curve according to the gear signal, achieving an no-load power saving rate of up to 40%.

[0077] Strong industrial compatibility

[0078] The clutch assembly 5 and drive assembly 6 can be replaced as a whole in a modular fashion, adapting to Φ50-80mm drill rig housings, with modification costs 30% lower than similar solutions on the market.

[0079] The above implementation methods and effects have been verified by laboratory prototypes: under continuous drilling conditions in granite (drill bit Φ25mm, feed rate 2m / min), there is no impact when switching between the three gears, the temperature rise of the whole machine is ≤15℃, and the overall energy efficiency is 22% higher than the national standard.

[0080] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A clutch assembly for a drilling rig, comprising a drilling rig (1), characterized in that, The drilling rig (1) includes an output shaft (3) at the front end and a water pipe connector (4). The output shaft (3) is used to be fixedly connected to the drill bit. The water pipe connector (4) is fixed to the water pipe. A gear switch (2) is provided in the middle of the drilling rig (1). The gear switch (2) drives the gear shift fork through the gear knob to change the state of the clutch assembly (5). The clutch assembly (5) is poweredly connected to the drive assembly (6). The drive assembly (6) is used to drive the output shaft (3) to output power.

2. A clutch assembly for a drilling rig according to claim 1, characterized in that: The drill (1) is internally equipped with a brushless controller (11), a capacitor (12) and a motor for controlling the operation of the drill (1), the motor consisting of a stator (14) and a rotor assembly (13).

3. A clutch assembly for a drilling rig according to claim 1, characterized in that: The gear position switch (2) is connected to the gear position fork (21) via a knob to control the movement of the gear position fork (21), and the output end of the gear position fork (21) is connected to the clutch assembly (5).

4. A clutch assembly for a drilling rig according to claim 3, characterized in that: The drive assembly (6) includes an output shaft (61), a first spur gear (62), a key (63), a sliding tooth (64), and a second spur gear (65), which are sequentially sleeved on the output shaft (61).

5. A clutch assembly for a drilling rig according to claim 4, characterized in that: A keyway is provided on the output shaft (61), the flat key (63) is located in the keyway, and the sliding teeth (64) are sleeved on the flat key (63).

6. A clutch assembly for a drilling rig according to claim 5, characterized in that: The second spur gear (65) is sleeved on the output shaft (61) and located on one side of the sliding tooth (64). The second spur gear (65) contacts and connects to the sliding tooth (64) and controls the movement of the sliding tooth (64).

7. A clutch assembly for a drilling rig according to claim 3, characterized in that: The clutch assembly (5) is engaged with the second spur gear (65). The clutch assembly (5) drives the second spur gear (65) through the gear, and then the second spur gear (65) drives the sliding shift tooth (64) to control the output gear of the motor.

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