Driving device and down-the-hole drill

Abstract

The utility model belongs to the technical field of down-the-hole drills, and discloses a driving device and a down-the-hole drill. The driving device comprises a hydraulic motor and a speed reducer, the speed reducer comprises a shell, a multi-stage planetary gear train structure and an output shaft, the hydraulic motor is arranged outside the shell, the multi-stage planetary gear train structure is arranged in the shell, and the multi-stage planetary gear train structure comprises a plurality of planet rows which are connected in series; a driving shaft of the hydraulic motor is in driving connection with an input piece of the multi-stage planetary gear train structure, and an output piece of the multi-stage planetary gear train structure is in transmission connection with the output shaft. Multi-stage speed reduction and torque increase of the speed reducer are realized through a multi-stage planetary gear train structure, so that the requirements of different working conditions of the down-the-hole drill can be met only by adopting a high-speed and small-displacement motor, the mechanical efficiency of a hydraulic motor is improved, the working oil consumption of the whole machine is reduced, the oil tank capacity of the whole machine is reduced, and the cost of the whole machine is reduced; in addition, the multi-stage planetary gear train structure is compact in overall structure, high in rigidity and high in impact resistance, and the service life of the driving device is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of down-the-hole drilling rig technology, and in particular to a drive device and a down-the-hole drilling rig. Background Technology

[0002] Down-the-hole (DH) drills are mainly used for rock drilling in various projects such as mining, foundation excavation, water conservancy, power plants, building materials, transportation, and national defense. They are characterized by deep drilling, large hole diameter, high drilling efficiency, and wide applicability, making them a commonly used rock drilling equipment. The drive unit, as the power source for drilling operations, is one of the most important working mechanisms of the drill. Its main functions are to output torque and speed, drive the drill rod and drill bit to rotate, provide power for the drill bit to cut the rock, and provide the pressure and lifting force required for drilling.

[0003] Existing hydraulic down-the-hole drill rigs primarily consist of a single low-speed motor or a dual low-speed motor driven by a parallel shaft reducer. The power source is the machine's hydraulic system, driven by a hydraulic motor. The parallel shaft reducer outputs torque, which is then transmitted to the drill rod, enabling its rotation. The shortcomings of this technology are: low-speed, high-displacement hydraulic motors experience significant internal power loss under high torque conditions, leading to high oil temperatures and requiring sufficient hydraulic circulation for flushing and cooling. Under low-speed, heavy-load conditions, the larger the hydraulic motor displacement, the greater the leakage, resulting in low motor transmission efficiency and high overall oil consumption. Furthermore, using a low-speed, high-displacement drive motor necessitates a large-capacity oil tank, increasing the overall hydraulic oil requirement and production costs. Due to the low motor output speed, the drilling operation requires a small-ratio, high-torque reducer; however, the parallel shaft gear transmission structure results in a large reducer with weak load-bearing capacity and impact resistance. Utility Model Content

[0004] The purpose of this utility model is to provide a drive device and a down-the-hole drill that can reduce the overall machine's oil consumption, reduce the overall machine's cost, and increase the service life of the drive device.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] The drive unit includes:

[0007] Hydraulic motor;

[0008] A speed reducer includes a housing, a multi-stage planetary gear train, and an output shaft. The hydraulic motor is disposed outside the housing, and the multi-stage planetary gear train is disposed inside the housing. The multi-stage planetary gear train includes multiple planetary gear sets connected in series. The drive shaft of the hydraulic motor is drivenly connected to the input component of the multi-stage planetary gear train, and the output component of the multi-stage planetary gear train is drivenly connected to the output shaft. The output shaft portion is located outside the housing.

[0009] As a preferred technical solution for the drive device, in the multiple planetary sets, the sun gear in the first-stage planetary set is the input component of the multi-stage planetary gear train structure; in two adjacent planetary sets, the planet carrier in the upper-stage planetary set is connected to the sun gear in the lower-stage planetary set to connect the two adjacent planetary sets in series; the planet carrier in the last-stage planetary set is the output component of the multi-stage planetary gear train structure.

[0010] As a preferred technical solution for the drive device, the gear rings in the multiple planetary gear sets are integrally arranged.

[0011] As a preferred technical solution for the drive device, the multi-stage planetary gear train structure is a two-stage planetary gear train structure, including a first-stage planetary gear set and a second-stage planetary gear set connected in series.

[0012] As a preferred technical solution for the drive device, the first-stage planetary gear set includes a first-stage sun gear, a first-stage planetary gear, a first-stage planetary carrier, and a first-stage ring gear. The first-stage planetary carrier includes a first-stage planetary gear mounting plate, and a first-stage planetary gear mounting shaft is provided on the first-stage planetary gear mounting plate. The first-stage planetary gears are mounted on the first-stage planetary gear mounting shaft.

[0013] As a preferred technical solution for the drive device, the secondary planetary gear set includes a secondary sun gear, secondary planet gears, a secondary planet carrier, and a secondary ring gear. The secondary planet carrier includes two secondary planet gear mounting plates, which are distributed in parallel and spaced apart. A secondary planet gear mounting shaft connects the two secondary planet gear mounting plates, and the secondary planet gears are mounted on the secondary planet gear mounting shaft.

[0014] As a preferred technical solution for the drive device, a bearing is provided between the output shaft and the housing, and the bearing is used to support the rotation of the output shaft.

[0015] As a preferred technical solution for the drive device, the housing has an oil passage formed on the periphery of the multi-stage planetary gear train structure, and the housing has an oil reservoir on the periphery of the bearing, with the oil passage connected to the oil reservoir.

[0016] As a preferred technical solution for the drive device, the housing includes multiple sub-housings, which are detachably connected.

[0017] A down-the-hole drill rig includes a drill rod and a drive unit as described in any of the above embodiments, wherein the drill rod is drively connected to the output shaft.

[0018] The beneficial effects of this utility model are:

[0019] This utility model provides a drive device, including a hydraulic motor and a reducer. The reducer includes a housing, a multi-stage planetary gear train structure, and an output shaft. The hydraulic motor is disposed outside the housing, and the multi-stage planetary gear train structure is disposed inside the housing. The multi-stage planetary gear train structure includes multiple planetary gear sets connected in series. The drive shaft of the hydraulic motor is drivenly connected to the input component of the multi-stage planetary gear train structure, and the output component of the multi-stage planetary gear train structure is drivenly connected to the output shaft. The output shaft portion is located outside the housing. The multi-stage planetary gear train structure achieves multi-stage reduction and torque amplification of the reducer, resulting in a large transmission ratio, high output torque, and a wide reduction range. Therefore, only a high-speed, small-displacement motor is needed to meet the requirements of different working conditions of down-the-hole drilling rigs, improving the mechanical efficiency of the hydraulic motor, reducing the overall oil consumption of the machine, and reducing the overall oil tank capacity, thus lowering the overall cost. Furthermore, the multi-stage planetary gear train structure, with its multiple planetary gear sets connected in series, makes the overall structure compact, rigid, and highly impact-resistant, thereby improving the service life of the drive device.

[0020] This utility model provides a down-the-hole drill rig. By setting the above-mentioned drive device, the overall machine's oil consumption can be reduced, the overall machine cost can be reduced, and the overall machine's service life can be increased. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the driving device provided in an embodiment of the present utility model.

[0022] In the picture:

[0023] 10. Hydraulic motor; 11. Drive shaft; 21. Housing; 211. Oil passage; 212. Oil reservoir; 22. Multi-stage planetary gear system; 221. First-stage sun gear; 222. First-stage planetary gears; 223. First-stage planetary gear mounting plate; 224. Second-stage sun gear; 225. Second-stage planetary gears; 226. Second-stage planetary gear mounting plate; 227. Integral gear ring; 23. Output shaft; 24. Bearing. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0025] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0028] like Figure 1As shown, this utility model embodiment provides a driving device, including a hydraulic motor 10 and a reducer. The reducer includes a housing 21, a multi-stage planetary gear train structure 22, and an output shaft 23. The hydraulic motor 10 is disposed outside the housing 21, and the multi-stage planetary gear train structure 22 is disposed inside the housing 21. The multi-stage planetary gear train structure 22 includes multiple planetary gear sets connected in series. The drive shaft 11 of the hydraulic motor 10 is drivenly connected to the input component of the multi-stage planetary gear train structure 22, and the output component of the multi-stage planetary gear train structure is drivenly connected to the output shaft 23. The output shaft 23 is partially located outside the housing 21. The multi-stage planetary gear train structure 22 achieves multi-stage reduction and torque amplification of the reducer, with a large transmission ratio, large output torque, and wide reduction range. Therefore, only a high-speed, small-displacement motor is needed to meet the needs of different working conditions of the down-the-hole drill rig, improving the mechanical efficiency of the hydraulic motor 10, reducing the overall oil consumption of the machine, and reducing the overall oil tank capacity, thus reducing the overall cost. In addition, the multi-stage planetary gear train structure 22 adopts a design of multiple planetary gear sets connected in series, which makes the overall structure compact, rigid, and impact resistant, thereby improving the service life of the drive device.

[0029] Specifically, in multiple planetary gear sets, the sun gear in the first-stage planetary gear set serves as the input component of the multi-stage planetary gear train structure 22. In adjacent planetary gear sets, the planet carrier in the previous stage is connected to the sun gear in the next stage, thus cascading the adjacent planetary gear sets in series. The planet carrier in the last stage planetary gear set serves as the output component of the multi-stage planetary gear train structure 22. Alternatively, other components in the first-stage planetary gear set can serve as input components. Correspondingly, the cascading method of adjacent planetary gear sets and the output component of the last stage planetary gear set will change. This is a standard configuration for planetary gear sets and will not be detailed here.

[0030] Furthermore, the integrated gear rings in multiple planetary gear sets further enhance the overall structural compactness.

[0031] In this embodiment, the multi-stage planetary gear train structure 22 is a two-stage planetary gear train structure, including a first-stage planetary gear set and a second-stage planetary gear set. The first-stage planetary gear set includes a first-stage sun gear 221, first-stage planetary gears 222, a first-stage planet carrier, and a first-stage ring gear. The first-stage planetary gears 222 are mounted on the first-stage planet carrier and mesh with both the sun gear and the first-stage ring gear. The second-stage planetary gear set includes a second-stage sun gear 224, second-stage planetary gears 225, a second-stage planet carrier, and a second-stage ring gear. The second-stage planetary gears 225 are mounted on the second-stage planet carrier and mesh with both the second-stage sun gear 224 and the second-stage ring gear. The first-stage sun gear 221 is the input component of the two-stage planetary gear train structure and is drivenly connected to the drive shaft 11 of the hydraulic motor 10. The first-stage planet carrier is drivenly connected to the second-stage sun gear 224, so that the first-stage and second-stage planetary gear sets are connected in series. The second-stage planet carrier is the output component of the two-stage planetary gear train structure, and the second-stage planetary gears 225 are drivenly connected to the output shaft 23. The primary gear ring and the secondary gear ring are integrated into a single unit, forming an integral gear ring 227.

[0032] Furthermore, the primary planetary carrier includes a primary planetary gear mounting plate 223, on which a primary planetary gear mounting shaft is disposed, and primary planetary gears 222 are disposed on the primary planetary gear mounting shaft. That is, the primary planetary gears 222 and the primary planetary carrier form a cantilever structure. The secondary planetary carrier includes two secondary planetary gear mounting plates 226, which are parallel and spaced apart, and a secondary planetary gear mounting shaft connects the two secondary planetary gear mounting plates 226. Secondary planetary gears 225 are disposed on the secondary planetary gear mounting shaft. That is, the secondary planetary gears 225 and the secondary planetary carrier form a straddle-type structure. This further improves the overall structural compactness and load-bearing capacity.

[0033] In this embodiment, a bearing 24 is provided between the output shaft 23 and the housing 21, and the bearing 24 is used to support the rotation of the output shaft 23. Optionally, multiple bearings 24 are provided, and the multiple bearings 24 are distributed at intervals along the axial direction of the output shaft 23 to provide more stable support for the output shaft 23. Optionally, the multiple bearings 24 can be selected as cylindrical roller bearings or tapered roller bearings, or some can be selected as cylindrical roller bearings and some as tapered roller bearings. Of course, other types of bearings can also be selected, and this embodiment is not the only one that can be used.

[0034] In this embodiment, the housing 21 is provided with an oil reservoir 212 on the periphery of the bearing 24. The oil reservoir 212 can store oil to lubricate the bearing 24.

[0035] Furthermore, the housing 21 has an oil passage 211 formed around the multi-stage planetary gear train structure 22, which is connected to the oil reservoir 212. When the reducer is working, the centrifugal force generated agitates the oil inside the housing 21, causing it to splash into the oil passage 211. As the oil passes through the oil passage 211, it interacts with the housing 21 in terms of heat, thus lowering its temperature. The cooled oil then enters the oil reservoir 212 and mixes with the existing oil, further reducing the overall temperature of the oil in the reservoir 212. As the reducer continues to operate, the oil in the reservoir 212 flows back into the inner cavity of the housing 21, forming an internal circulation, which further reduces the internal temperature of the reducer housing 21 and improves the reducer's heat dissipation performance.

[0036] In this embodiment, the housing 21 includes multiple sub-housings, which are detachably connected to facilitate the assembly and maintenance of the internal structure of the housing 21.

[0037] This utility model embodiment also provides a down-the-hole drill, including a drill rod and the aforementioned drive device. The drill rod is tractively connected to the output shaft 23, and the drive device can drive the drill rod to rotate. By setting the aforementioned drive device, the overall machine's oil consumption can be reduced, the overall machine cost can be reduced, and the overall machine's service life can be increased.

[0038] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. Drive device, characterized in that The application relates to a driving device for a drilling rod. The driving device comprises a hydraulic motor (10), a reduction machine and an output shaft (23), the hydraulic motor (10) is arranged outside a housing (21) of the reduction machine, a multi-stage planetary gear train structure (22) is arranged in the housing (21), the multi-stage planetary gear train structure (22) comprises a plurality of planetary rows connected in series, a driving shaft (11) of the hydraulic motor (10) is drivingly connected with an input of the multi-stage planetary gear train structure (22), an output of the multi-stage planetary gear train structure is drivingly connected with the output shaft (23), and the output shaft (23) is partially arranged outside the housing (21). The multi-stage planetary gear train structure (22) is a two-stage planetary gear train structure, and comprises a first-stage planetary row and a second-stage planetary row connected in series. The first-stage planetary row comprises a first-stage sun gear (221), a first-stage planetary gear (222), a first-stage carrier and a first-stage ring gear, the first-stage carrier comprises a first-stage planetary gear mounting plate (223) provided with a first-stage planetary gear mounting shaft, and the first-stage planetary gear (222) is arranged on the first-stage planetary gear mounting shaft. The second-stage planetary row comprises a second-stage sun gear (224), a second-stage planetary gear (225), a second-stage carrier and a second-stage ring gear, the second-stage carrier comprises two second-stage planetary gear mounting plates (226) distributed in parallel and at intervals, and a second-stage planetary gear mounting shaft is arranged between the two second-stage planetary gear mounting plates (226), and the second-stage planetary gear (225) is arranged on the second-stage planetary gear mounting shaft. A bearing (24) is arranged between the output shaft (23) and the housing (21), and the bearing (24) is used for supporting the rotation of the output shaft (23). An oil channel (211) is formed on the periphery of the multi-stage planetary gear train structure (22) of the housing (21), and an oil storage groove (212) is arranged on the periphery of the bearing (24) of the housing (21), and the oil channel (211) and the oil storage groove (212) are in communication. Among the plurality of planetary rows, the sun gear in the planetary row at the first stage is the input of the multi-stage planetary gear train structure (22), the carrier in the planetary row at the upper stage is connected with the sun gear in the planetary row at the lower stage among the two adjacent planetary rows, so that the two adjacent planetary rows are connected in series, and the carrier in the planetary row at the last stage is the output of the multi-stage planetary gear train structure (22).

2. The drive apparatus according to claim 1, characterized by The ring gears in the plurality of planetary rows are integrally arranged.

3. The drive apparatus according to claim 1, characterized by The housing (21) comprises a plurality of sub-housings, and the plurality of sub-housings are detachably connected.

4. Drive arrangement according to any of claims 1-3, characterized in that The application further relates to a drilling rod and a driving device as claimed in any one of claims 1-4, and the drilling rod is drivingly connected with the output shaft (23).

5. A raise boring machine characterised in that, ​

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