A variable speed gear box for a power head

Abstract

The utility model relates to a kind of speed regulating gear box for power head, including two rotating shafts respectively connected with power device and shaft joint on shell, two bearings respectively located on two rotating shafts, interval plate between two rotating shafts is equipped on the shell, two coaxial line settings counterbore are set up on the two end faces of interval plate along rotating shaft axial arrangement, two bearings are respectively mounted in two counterbores.The utility model is used, through the setting of coaxial line counterbore, the positioning and installation of two bearings are realized, while guaranteeing the coaxial line of two rotating shafts, reduce the vibration generated by rotating shaft high-speed operation;Increase oil cooling interface and the amount of cooling oil, improve the heat dissipation effect of shell;Make bearing just embedded into interval plate, improve contact fixed area, also avoid counterbore thickness, reduce the strength of baffle;Through the setting of planetary gear and transmission shaft, the rotational speed difference of two rotating shafts is adjusted.

Description

Technical Field

[0001] This utility model relates to the field of drilling rig power heads, and more particularly to the field of power head gearbox technology, specifically referring to a speed regulating gearbox for a power head. Background Technology

[0002] The drilling rig's power head is the core component of the drilling rig, and different drilling parameters are required for different applications and geological conditions. For example, in soft soil layers, a lower rotational speed and higher torque may be needed to prevent collapse and equipment damage; while in hard rock layers, a higher rotational speed and moderate torque may be required to improve drilling speed and efficiency. Therefore, the drilling rig's power head must have the ability to flexibly adjust drilling parameters to adapt to different construction needs and geological conditions, thereby optimizing the construction process.

[0003] In existing technologies, to enable drill rig power heads to flexibly adjust drilling parameters, multiple motors can be connected in series and parallel to achieve different power output modes. By switching between gear pairs with large and small transmission ratios, the power head can provide a wide range of speed adjustment and a large torque output under different working conditions. This design allows operators to flexibly adjust the performance of the power head according to specific geological conditions and construction requirements to optimize drilling efficiency.

[0004] However, in the existing technology, the power unit indirectly connects two rotating shafts. The high-speed operation of the two rotating shafts will generate vibration, and the housing also has the problem of serious heat generation. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing a speed-regulating gearbox for a power head, which reduces vibrations caused by high-speed shaft rotation. Simultaneously, it increases the amount of oil cooling interface and cooling oil, improving the heat dissipation effect of the housing.

[0006] This utility model is achieved through the following technical solution: a speed regulating gearbox for a power head, comprising two rotating shafts respectively connected to a power device and axially connected to a housing, two bearings respectively located on the two rotating shafts, a spacer plate located between the two rotating shafts on the housing, and two coaxial countersunk holes opened on the two end faces of the spacer plate arranged along the axial direction of the rotating shafts, with the two bearings respectively installed in the two countersunk holes.

[0007] In use, this utility model achieves the positioning and installation of two bearings by setting coaxial countersunk holes, ensuring that the two rotating shafts are coaxial while reducing the vibration generated by the high-speed rotation of the rotating shafts.

[0008] Preferably, the thickness of the countersunk hole is the same as the thickness of the corresponding bearing. This preferred solution allows the bearing to be precisely embedded within the spacer, increasing the contact and fixing area, while also avoiding a large countersunk hole thickness that would reduce the strength of the spacer.

[0009] Preferably, the spacer includes an intermediate ring spaced between two countersunk holes, the thickness of which is 0.25-0.33 times the thickness of the spacer. This preferred embodiment effectively isolates the two bearings by defining the intermediate ring.

[0010] Preferably, the inner diameter of the intermediate ring is matched with the inner diameter of the bearing outer ring. This preferred solution avoids the intermediate ring being too small, which would affect the rotation of the bearing.

[0011] Preferably, the power shaft of the power unit is connected to the first rotating shaft via a planetary gear. A transmission shaft, passing through the intermediate ring and connected to the second rotating shaft, is also connected to the power shaft. The transmission shaft passes through the first rotating shaft and is connected to the second rotating shaft via a spline. This preferred embodiment achieves adjustment of the speed difference between the two rotating shafts through the arrangement of the planetary gear and the transmission shaft.

[0012] Preferably, the housing is also provided with several oil cooling interfaces that communicate with the oil cooling channels inside the housing. This preferred solution, by providing multiple oil cooling interfaces, facilitates the addition of coolant, thereby achieving rapid cooling.

[0013] Preferably, a drive gear is also connected to the rotating shaft, and an observation window for observing the drive gear is provided on the housing. This preferred embodiment, through the provision of the observation window, facilitates the observation of the internal conditions of the housing by the operator.

[0014] Preferably, the spacer plate is integrally formed with the housing. This preferred embodiment enhances the connection strength between the housing and the spacer plate through its integral formation.

[0015] The beneficial effects of this utility model are as follows: by setting the coaxial countersunk hole, the positioning and installation of the two bearings are realized, ensuring that the two rotating shafts are coaxial while reducing the vibration generated by the high-speed operation of the rotating shafts; increasing the amount of oil cooling interface and cooling oil improves the heat dissipation effect of the housing; making the bearings fit perfectly into the partition plate, increasing the contact and fixing area, while also avoiding the large thickness of the countersunk hole, which would reduce the strength of the partition plate; and by setting the planetary gear and transmission shaft, the speed difference between the two rotating shafts can be adjusted. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is an enlarged schematic diagram of the partition plate. Figure 3 This is a three-dimensional schematic diagram of the partition plate. Figure 4 A three-dimensional schematic diagram of the observation window; As shown in the figure: 1. Motor, 2. Oil cooling interface, 3. Housing, 4. Drive gear, 5. Spacer plate, 6. First shaft, 7. Second shaft, 8. Driven gear, 9. Intermediate ring, 10. Bearing, 11. Countersunk hole, 15. Observation window. Detailed Implementation

[0017] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0018] See attached document Figure 1-4 This utility model discloses a speed-regulating gearbox for a power head, comprising a housing 3, a motor 1 mounted on the housing 3, an output shaft of the motor 1 connected to a planetary gear, the planetary gear connected to a first rotating shaft 6, a transmission shaft passing through the center of the first rotating shaft 6, the transmission shaft being connected to the output shaft of the motor 1, a second rotating shaft 7 at the rear end of the first rotating shaft 6, a splined portion of the transmission shaft inserted into the second rotating shaft 7, the transmission shaft driving the rotation of the second rotating shaft 7 via the spline, the two rotating shafts being axially aligned, both rotating shafts being axially connected within the housing 3, each rotating shaft being provided with a bearing 10, a spacer plate 5 located between the two rotating shafts on the housing 3, the spacer plate 5 being integrally formed with the housing 3, two coaxially aligned countersunk holes 11 being formed on the two end faces of the spacer plate 5 arranged along the axial direction of the rotating shafts, the two bearings 10 being respectively installed in the two countersunk holes 11.

[0019] The thickness of the countersunk hole 11 is the same as the thickness of the corresponding bearing 10. The spacer plate 5 includes an intermediate ring 9 that separates two countersunk holes 11. The drive shaft passes through the countersunk hole 11, the intermediate ring 9, and the countersunk hole 11 in one pass before connecting to the second rotating shaft 7. The thickness of the intermediate ring 9 is 0.25-0.33 times the thickness of the spacer plate 5. The inner diameter of the intermediate ring 9 is adapted to the inner diameter of the outer ring of the bearing 10.

[0020] The housing 3 is also provided with several oil cooling interfaces 2 that communicate with the oil cooling channels inside the housing 3.

[0021] The rotating shaft is also connected to a drive gear 4, and the housing 3 is provided with an observation window 15 for observing the drive gear 4.

[0022] The housing 3 also includes an output shaft, a driven gear 8 located on the output shaft and meshing with the drive gear 4, and a shift fork that drives the driven gear 8 to mesh with a drive gear 4. The shift fork is existing technology.

[0023] In use, this utility model achieves the positioning and installation of two bearings 10 by setting the coaxial countersunk hole 11, ensuring that the two rotating shafts are coaxial while reducing the vibration generated by the high-speed rotation of the rotating shafts; it increases the amount of oil cooling interface 2 and cooling oil, improving the heat dissipation effect of the housing 3; it allows the bearings 10 to be perfectly embedded in the partition plate 5, increasing the contact and fixing area, while also avoiding the large thickness of the countersunk hole 11, which would reduce the strength of the partition plate; and it achieves the adjustment of the speed difference between the two rotating shafts by setting the planetary gear and the transmission shaft.

[0024] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A speed-regulating gearbox for a power head, comprising two rotating shafts respectively connected to a power unit and axially connected to a housing (3), and two bearings (10) respectively located on the two rotating shafts, characterized in that: The housing (3) is provided with a spacer plate (5) located between two rotating shafts. The spacer plate (5) has two collinear countersunk holes (11) on its two end faces arranged along the axial direction of the rotating shafts. Two bearings (10) are respectively installed in the two countersunk holes (11).

2. The speed-regulating gearbox for the power head according to claim 1, characterized in that: The thickness of the countersunk hole (11) is the same as the thickness of the corresponding bearing (10).

3. The speed-regulating gearbox for the power head according to claim 1, characterized in that: The spacer plate (5) includes an intermediate ring (9) that spaced two countersunk holes (11), the thickness of which is 0.25-0.33 times the thickness of the spacer plate (5).

4. The speed-regulating gearbox for the power head according to claim 3, characterized in that: The inner diameter of the intermediate ring (9) is adapted to the inner diameter of the outer ring of the bearing (10).

5. The speed-regulating gearbox for the power head according to claim 4, characterized in that: The power shaft of the power unit is connected to the first rotating shaft (6) via a planetary gear. The power shaft is also connected to a transmission shaft that passes through the intermediate ring (9) and is connected to the second rotating shaft (7). The transmission shaft passes through the first rotating shaft (6) and is connected to the second rotating shaft (7) via a spline.

6. The speed-regulating gearbox for the power head according to claim 1, characterized in that: The housing (3) is also provided with several oil cooling interfaces (2) that are connected to the oil cooling channels inside the housing (3).

7. The speed-regulating gearbox for the power head according to claim 1, characterized in that: The shaft is also connected to a drive gear (4), and the housing (3) is provided with an observation window (15) for observing the drive gear (4).

8. The speed-regulating gearbox for the power head according to claim 1, characterized in that: The spacer plate (5) is integrally formed with the shell (3).

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