A double spindle power head device suitable for double-rod drilling
By designing a dual-chuck power head device, utilizing two hydraulic motors and an independent oil supply system, the problems of low torque and high wear in existing devices are solved, enabling high-torque drilling operations and reliable clamping of drill rods in confined spaces.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUIZHOU NENGAN ELECTROMECHANICAL EQUIP MFG CO LTD
- Filing Date
- 2025-07-14
- Publication Date
- 2026-07-10
AI Technical Summary
Existing dual-chuck power head devices have low torque and are difficult to increase in confined spaces. Furthermore, traditional single-chuck gripping of drill rods results in high surface contact stress and severe wear, making it impossible to add or remove water braids.
It adopts a dual-chuck power head device, with two hydraulic motors driving the spindle and supplying oil to each through independent oil supply components. The hydraulic motors can increase torque, the disc brake assembly is used for emergency braking to prevent gear breakage, and the rubber sleeve chuck is used to clamp the drill rod.
Without increasing the size of the hydraulic motor, it significantly increases torque capacity, reduces drill rod wear, is suitable for drilling operations in confined spaces, and enables reliable clamping and emergency braking of the drill rod.
Smart Images
Figure CN224478876U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tunnel drilling technology, specifically a dual-chuck power head device suitable for dual-drill-rod drilling. Background Technology
[0002] Tunnel drilling rigs are engineering machinery specifically designed for drilling operations in confined spaces such as underground roadways, tunnels, and mines. They are widely used in mining, especially coal and metal mines, tunnel excavation, geological exploration, and disaster prevention such as gas drainage and water exploration. Traditional tunnel drilling rig power heads are mainly front-mounted rubber-sleeve chuck power heads, with only one chuck that can hold only one drill rod. When the drilling torque exceeds 20,000 Nm, the outer diameter of the drill rod increases, and the outer diameter of the rubber-sleeve chuck also increases, along with the thickness of the rubber sleeve wall. This limits the development of high-power power heads and high-power drilling rigs. In addition, holding a drill rod with a single chuck results in high contact stress and wear on the drill rod surface. Furthermore, front-mounted chuck power heads cannot achieve the addition and removal of water braces.
[0003] In the prior art, patent CN214463860U discloses a dual-chuck hydraulic power head, including a main shaft with through holes mounted on a frame, a front hydraulic chuck and a rear hydraulic chuck located at the front and rear ends of the main shaft respectively, a drive device connected to the main shaft to drive its rotation, and the front and rear hydraulic chucks connected to an oil supply system. The oil supply system includes an oil distribution sleeve fitted on the main shaft, with a first oil supply channel and a second oil supply channel respectively connected to a first oil passage and a second oil passage mounted on the main shaft. The first and second oil passages supply oil to the front and rear hydraulic chucks respectively, and can supply oil simultaneously or separately. The drive device includes a reducer connected to the main shaft and a hydraulic motor connected to the reducer. This solution has the following drawbacks: only one hydraulic motor drives the main shaft. Since the hydraulic motor has limited hydraulic oil pressure, a larger hydraulic motor needs to be replaced if higher torque is required, which is not conducive to drilling operations in confined spaces. Utility Model Content
[0004] To address the shortcomings of existing technologies, the technical problem solved by this utility model is to provide a dual-chuck power head device suitable for dual-drill-rod drilling, thereby solving the problem of low torque in existing dual-chuck power heads.
[0005] To solve the above problems, the technical solution adopted by this utility model is: a dual-chuck power head device suitable for dual-drill-rod drilling, including a spindle, a front hydraulic chuck, a rear hydraulic chuck, a drive assembly, and an oil supply assembly. The front hydraulic chuck and the rear hydraulic chuck are located at the front and rear ends of the spindle, respectively. The drive assembly includes a reducer and a hydraulic motor. The reducer is equipped with a large gear fixedly installed on the spindle. There are two hydraulic motors, each meshing with the large gear through an input gear. The two hydraulic motors are symmetrically installed on the reducer. A disc brake assembly is connected to one of the input gears. The oil supply assembly includes two oil distribution sleeves, which are sleeved on the spindle. The two oil distribution sleeves are located on both sides of the reducer.
[0006] Furthermore, the oil distribution sleeve is provided with an oil supply channel that is connected to the front hydraulic chuck and the rear hydraulic chuck respectively through the oil circuits on both sides of the main shaft, and the two oil distribution sleeves are supplied with oil independently.
[0007] Furthermore, an oil filter is provided at the oil inlet of the oil distribution sleeve.
[0008] Furthermore, the hydraulic motor is a variable displacement piston motor.
[0009] Furthermore, both the front-end hydraulic chuck and the rear-end hydraulic chuck are rubber cylinder chucks.
[0010] The beneficial effects of this solution are as follows: Compared with the prior art, the dual chuck power head device of this utility model is equipped with two hydraulic motors to drive the spindle, which can increase the torque without increasing the size of the hydraulic motors. In addition, a disc brake assembly is connected to the input gear of one of the hydraulic motors, which can provide emergency braking when the drill gets stuck, thus preventing the gears from breaking. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0012] Figure 2 This is a top view of the present invention;
[0013] Figure 3 for Figure 2 Schematic diagram of section AA;
[0014] Figure 4 This is a schematic diagram of the internal structure of this utility model;
[0015] In the diagram: 1-spindle, 2-front hydraulic chuck, 3-rear hydraulic chuck, 4-reducer, 5-hydraulic motor, 6-large gear, 7-input gear, 8-disc brake assembly, 9-oil bushing, 10-oil filter. Detailed Implementation
[0016] 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.
[0017] Implementation, for example, attached Figures 1 to 4 The diagram shows a dual-chuck power head device suitable for dual-drill-rod drilling, comprising a spindle 1, a front hydraulic chuck 2, a rear hydraulic chuck 3, a drive assembly, and an oil supply assembly. The front hydraulic chuck 2 and the rear hydraulic chuck 3 are located at the front and rear ends of the spindle 1, respectively. The drive assembly includes a reducer 4 and hydraulic motors 5. The reducer 4 has a large gear 6 fixedly installed on the spindle 1. There are two hydraulic motors 5, each meshing with the large gear 6 through input gears 7. The two hydraulic motors 5 are symmetrically mounted on the reducer 4. One of the input gears 7 is connected to a disc brake assembly 9. The two hydraulic motors 5 can provide greater torque to the spindle 1. The disc brake assembly 9 can provide emergency braking when the drill string gets stuck, absorbing the torsional elastic potential energy of the drill string and preventing gear breakage. The oil supply assembly includes two oil distribution sleeves 10, which are sleeved on the spindle 1. The two oil distribution sleeves 10 are located on both sides of the reducer 4 and supply oil to the front hydraulic chuck 2 and the rear hydraulic chuck 3, respectively.
[0018] The oil distribution sleeve 10 is provided with an oil supply channel that is connected to the front hydraulic chuck 2 and the rear hydraulic chuck 3 through the oil circuits on both sides of the spindle 1. The two oil distribution sleeves 10 are supplied with oil independently, which makes it convenient to control the hydraulic pressure of the two hydraulic chucks separately and is more conducive to clamping drill rods with different outer diameters. The oil inlet of the oil distribution sleeve 10 is provided with an oil filter 11 to filter the hydraulic oil and prevent impurities from affecting the normal operation of the hydraulic chuck. The hydraulic motor 5 is a variable displacement piston motor, and the front hydraulic chuck 2 and the rear hydraulic chuck 3 are both rubber sleeve chucks.
[0019] The specific implementation process is as follows:
[0020] The drill rod is clamped using the front hydraulic chuck 2 and the rear hydraulic chuck 3. When the drilling torque is low, a single hydraulic motor 5 can drive the spindle 1 to rotate and rotate the drill rod. When it is necessary to increase the drilling torque, two hydraulic motors 5 can be used to drive the spindle 1 to rotate simultaneously. The two hydraulic motors 5 are supplied with oil independently, which greatly improves the torque. There is no need to increase the size of a single hydraulic motor 5. The space occupied by the entire power head device is small, which is beneficial for drilling operations in confined spaces.
[0021] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. A dual-chuck power head device suitable for dual-drill-rod drilling, comprising a spindle, a front hydraulic chuck, a rear hydraulic chuck, a drive assembly, and an oil supply assembly, wherein the front hydraulic chuck and the rear hydraulic chuck are respectively located at the front and rear ends of the spindle, and the drive assembly includes a reducer and a hydraulic motor, characterized in that: The reducer is equipped with a large gear fixedly mounted to the main shaft. There are two hydraulic motors, which mesh with the large gear through input gears. The two hydraulic motors are symmetrically mounted on the reducer. One of the input gears is connected to a disc brake assembly. The oil supply assembly includes two oil distribution sleeves, which are sleeved on the main shaft. The two oil distribution sleeves are located on both sides of the reducer.
2. The dual-chuck power head device for dual-drill-rod drilling according to claim 1, characterized in that: The oil distribution sleeve is equipped with an oil supply channel that is connected to the front hydraulic chuck and the rear hydraulic chuck through oil passages on both sides of the main shaft, and the two oil distribution sleeves are independently supplied with oil.
3. The dual-chuck power head device for dual-drill-rod drilling according to claim 1, characterized in that: An oil filter is installed at the oil inlet of the oil distribution sleeve.
4. The dual-chuck power head device for dual-drill-rod drilling according to claim 1, characterized in that: The hydraulic motor is a variable displacement piston motor.
5. The dual-chuck power head device for dual-drill-rod drilling according to claim 1, characterized in that: Both the front-end hydraulic chuck and the rear-end hydraulic chuck are rubber cylinder chucks.