Rotary power head for rotary drill

Abstract

The utility model discloses a rotary power head for a rotary drilling machine, and belongs to the technical field of mining mechanical equipment. Wherein the parallel stage device comprises an input gear shaft, a main shaft large gear and a spline main shaft; the planet-level device comprises a planet carrier output main shaft, a planet wheel and a sun wheel; an input gear shaft is connected with a hydraulic motor to achieve input of a power source, and a main shaft large gear is in interference fit with a spline main shaft and is meshed with the input gear shaft at the same time to conduct parallel transmission of a power head. The sun gear is connected with the spline main shaft so as to input power from the parallel stage to the planetary stage, and the planet gear is installed on the planet carrier output main shaft and meshed with the sun gear. Through the arrangement, the planetary transmission single-stage speed ratio range can reach 2.8-12.5, the transmission ratio range is large, the output torque is increased, the punching efficiency is improved, and the requirement of the large-torque working condition is met. In addition, the sun wheel floating type uniform load mechanism is adopted, so that the planet wheels uniformly share loads, and the advantages of small radial size, light weight and high bearing capacity are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of mining machinery and equipment, and more specifically, to a rotary power head for a rotary drill. Background Art

[0002] The mining industry is the foundation of the national economy and an important basic industry in my country, providing indispensable fuel for production and life. The rotary drill is one of the main equipment for open-pit mining. The efficiency and stability of the equipment determine the production efficiency and economic benefits of the mine. The rotary power head is the transmission equipment for the rotary drill to achieve drilling. It directly bears the load, impact and vibration generated during the drilling process. Therefore, its performance and quality have a great impact on the drilling efficiency of the drill.

[0003] The existing drilling rig rotary power head has problems such as small transmission ratio, small output torque, excessive radial size when the transmission ratio is large, low transmission efficiency, poor impact and vibration resistance, and short service life. Summary of the invention

[0004] The content of this application is used to introduce concepts in a brief form, which will be described in detail in the detailed implementation section below. The content of this application is not intended to identify the key features or essential features of the technical solution claimed for protection, nor is it intended to limit the scope of the technical solution claimed for protection.

[0005] Some embodiments of the present application propose a one-stage planetary and one-stage parallel two-stage transmission rotary power head to solve the problems of existing commonly used rotary power heads, such as small transmission ratio, small output torque, excessive radial dimension at large transmission ratio, low transmission efficiency, poor impact and vibration resistance, and short service life.

[0006] Some embodiments of the present application provide a rotary power head for a rotary drill, comprising:

[0007] a parallel stage device including an input gear shaft, a main shaft bull gear and a splined main shaft;

[0008] A planetary stage device, which includes a planet carrier output main shaft, planetary gears and a sun gear;

[0009] The input gear shaft is connected to the hydraulic motor to realize the input of the power source, and the main shaft gear is interference fit with the spline main shaft and meshes with the input gear shaft at the same time to perform parallel stage transmission of the power head;

[0010] The sun gear is connected to the spline main shaft to input the power of the planetary stage in parallel. The planetary gear is installed on the output main shaft of the planetary carrier, and the planetary gear is meshed with the sun gear.

[0011] Furthermore, it comprises an upper case cover and a main case body, and the input gear shaft is installed between the upper case cover and the main case body through a bearing.

[0012] Furthermore, the upper end of the input gear shaft is connected to the upper box cover through a deep groove ball bearing, and the lower end of the input gear shaft is connected to the main box body through a spherical roller bearing.

[0013] Furthermore, a first internal spline is processed on the upper end of the input gear shaft, and the first internal spline cooperates with the external spline shaft of the hydraulic motor.

[0014] Furthermore, the spline main shaft is fixed in the main housing through a first tapered roller bearing and a second tapered roller bearing.

[0015] Furthermore, an external spline is provided at the upper end of the sun gear, and the external spline cooperates with a second internal spline at the lower end of the spline main shaft.

[0016] Furthermore, there are multiple planetary gears, and all of the multiple planetary gears are mounted on the output spindle of the planet carrier through planetary gear bearings and planetary gear pins.

[0017] Furthermore, it comprises an inner gear ring, and the planetary gears are meshed with the inner gear ring.

[0018] Furthermore, the inner gear ring is mounted on the main housing via stud bolts and / or pins.

[0019] Furthermore, the planet carrier output main shaft is connected to the main housing and the lower housing cover through a third tapered roller bearing and a fourth tapered roller bearing.

[0020] The beneficial effects of this application are:

[0021] (1) The single-stage speed ratio range of the planetary transmission can reach about 2.8 to 12.5. The transmission ratio range is large, which increases the output torque, improves the drilling efficiency, and better meets the needs of high-torque working conditions.

[0022] (2) The sun gear floating load-sharing mechanism is used to evenly share the load among the planetary gears, thereby enhancing the gear load-bearing capacity, reducing noise, improving stability and reliability, and extending service life.

[0023] (3) Compared with the traditional two-stage cylindrical gear rotary gearbox, the rotary gearbox of the present application adopts a two-stage structure of one-stage parallel and one-stage planetary, and has a higher transmission efficiency.

[0024] (4) The two-stage planetary gear transmission of the present application uses several identical planetary gears, which are evenly distributed around the sun gear and mesh with the inner ring gear to transmit power. Each planetary gear shares the load. Therefore, it has the advantages of small radial size, light weight, and high load-bearing capacity. Compared with ordinary cylindrical gear rotary gearboxes, the volume and weight can be reduced by 30% to 50%.

[0025] (5) In addition, the planetary carrier output shaft and the splined main shaft are both installed with tapered roller bearings. The entire output shaft system is supported by two pairs of tapered bearings, which greatly improves the axial load-bearing capacity of the output shaft system and has strong resistance to impact and vibration. The strength and rigidity of the planetary carrier output shaft are higher than the output shaft of the traditional rotary power head, and it is suitable for working conditions with heavy loads and large impacts. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the composition of the two-stage transmission of the parallel-stage device and the planetary-stage device.

[0027] Description of labels:

[0028] 1. Upper case cover; 2. Main case body; 3. Internal gear ring; 4. Lower case cover; 5. Lower end cover; 6. Input gear shaft; 7. Deep groove ball bearing; 8. Spherical roller bearing; 9. First tapered roller bearing; 10. Second tapered roller bearing; 11. Main shaft gear; 12. Splined main shaft; 13. Planetary carrier output main shaft; 14a. Third tapered roller bearing; 14b. Fourth tapered roller bearing; 15. Planetary gear; 16. Planetary gear pin; 17. Sun gear. DETAILED DESCRIPTION

[0029] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0030] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0031] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0032] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0033] The names of the messages or information exchanged between multiple devices in the embodiments of the present disclosure are only used for illustrative purposes and are not used to limit the scope of these messages or information.

[0034] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0035] Example 1

[0036] like Figure 1 As shown, a rotary power head for a rotary drill in this embodiment includes a parallel stage device, which includes an input gear shaft 6, a main shaft gear 11 and a spline main shaft 12; a planetary stage device, which includes a planetary carrier output main shaft 13, planetary gears 15 and a sun gear 17.

[0037] Among them, the input gear shaft 6 is connected to the hydraulic motor to realize the input of the power source, the main shaft gear 11 is interference fit with the spline main shaft 12, and at the same time meshes with the input gear shaft 6 to perform parallel stage transmission of the power head.

[0038] The sun gear 17 is connected to the spline main shaft 12 for parallel-stage input of planetary-stage power. The planetary gears 15 are mounted on the planetary carrier output main shaft 13 , and the planetary gears 15 are meshed with the sun gear 17 .

[0039] Example 2

[0040] Based on Embodiment 1, the rotary power head includes an upper box cover 1 and a main box body 2, and the input gear shaft 6 is installed between the upper box cover 1 and the main box body 2 through a bearing.

[0041] Example 3

[0042] Based on Example 2, the upper end of the input gear shaft 6 is connected to the upper case cover 1 through a deep groove ball bearing 7, and the lower end of the input gear shaft 6 is connected to the main case body 2 through a spherical roller bearing 8.

[0043] Example 4

[0044] Based on the first embodiment, a first internal spline is processed on the upper end of the input gear shaft 6, and the first internal spline cooperates with the external spline shaft of the hydraulic motor.

[0045] Example 5

[0046] Based on Embodiment 2, the spline main shaft 12 is fixed in the main housing 2 via the first tapered roller bearing 9 and the second tapered roller bearing 10 .

[0047] Example 6

[0048] Based on the second embodiment, an external spline is provided at the upper end of the sun gear 17 , and the external spline cooperates with the second internal spline at the lower end of the spline main shaft 12 .

[0049] Example 7

[0050] Based on Example 1, this embodiment has multiple planetary gears 15, for example, three or more, and the multiple planetary gears 15 are all installed on the planetary carrier output main shaft 13 through planetary gear bearings and planetary gear pins 16.

[0051] Example 8

[0052] Based on the first embodiment, the inner ring gear 3 is included, and the planetary gears 15 mesh with the inner ring gear 3 .

[0053] Example 9

[0054] Based on Embodiment 8, the inner gear ring 3 is mounted on the main housing 2 via stud bolts and / or pins.

[0055] Example 10

[0056] Based on the first embodiment, the planetary carrier output main shaft 13 is connected to the main housing 2 and the lower housing cover 4 respectively through the third tapered roller bearing 14a and the fourth tapered roller bearing 14b.

[0057] Based on the above embodiments, the rotary power head of the present application is composed of a first-stage parallel stage device and a second-stage planetary stage device. Specifically, the parallel stage device includes an upper box cover 1, a main box body 2, an input gear shaft 6, a main shaft gear 11, a spline main shaft 12, a deep groove ball bearing 7, a spherical roller bearing 8, a first tapered roller bearing 9, and a second tapered roller bearing 10.

[0058] The input gear shaft is fixed to the main housing through a bearing, and the upper end of the input gear shaft is processed with a first internal spline, which is connected to the external spline shaft of the hydraulic motor through an involute spline to realize the input of the power source. The main shaft gear is installed on the spline main shaft through a key and interference fit, and the main shaft gear and the input gear shaft are meshed to realize the parallel stage transmission of the power head.

[0059] In addition, the spline main shaft is fixed in the main housing through paired tapered roller bearings, namely a first tapered roller bearing and a second tapered roller bearing, and this arrangement improves the axial load-bearing capacity of the slewing head.

[0060] The planetary stage device of the present application specifically comprises an inner gear ring 3 , planetary gears 15 , planetary gear pins 16 , a sun gear 17 , a planetary carrier output spindle 13 , a lower case cover 4 and a lower end cover 5 .

[0061] Among them, the sun gear is used as the input shaft, and the parallel-stage input of planetary-stage power is realized through the connection between the external spline at its upper end and the second internal spline at the lower end of the spline main shaft. Multiple planetary gears are installed on the output main shaft of the planetary carrier through planetary gear bearings and planetary gear pins, and the planetary gears are meshed with the sun gear and the inner gear ring respectively. The inner gear ring is connected to the main housing through stud bolts and pins. The output shaft of the planetary carrier is fixedly installed through paired tapered roller bearings, namely the third tapered roller bearing and the fourth tapered roller bearing, which further improves the axial load-bearing capacity of the output shaft of the slewing head.

[0062] The main working principle is as follows:

[0063] During the drilling operation of the rotary drill, under the control of the drilling rig hydraulic system, the hydraulic motor drives the input gear shaft 6 to rotate, and the input gear shaft 6 drives the main shaft gear 11 meshing with it. The main shaft gear 11 and the spline main shaft 12 have an interference fit, so the spline main shaft 12 rotates immediately, and the rotary power head completes the parallel stage transmission. Then, the spline main shaft 12 drives the sun gear 17 connected to it, and realizes the input of parallel stage to planetary stage power. Since the planetary gear 15 meshes with the sun gear 17, the planetary gear 15 also starts to rotate at this time, and then drives the planetary carrier output main shaft 13 to rotate, and finally completes the drive of the drill rod and drill bit of the rotary drill.

[0064] Therefore, the transmission ratio range of the rotary power head for the rotary drill of the present application is wider, and the single-stage speed ratio range of the planetary transmission can reach about 2.8 to 12.5, which increases the output torque, improves the drilling efficiency, and better meets the needs of high-torque working conditions.

[0065] By adopting the sun gear floating load-sharing mechanism, the planetary gears share the load evenly, which enhances the gear bearing capacity, reduces noise, improves stability and reliability, and prolongs the service life.

[0066] Compared with the traditional two-stage cylindrical gear rotary gearbox, the rotary gearbox of the present application adopts a two-stage structure of a primary parallel and a primary planetary, and has a higher transmission efficiency.

[0067] The two-stage planetary gear transmission of the present application uses several identical planetary gears, which are evenly distributed around the sun gear and mesh with the inner gear ring to transmit power, and each planetary gear shares the load. Therefore, it has the advantages of small radial size, light weight, and high load-bearing capacity. Compared with ordinary cylindrical gear rotary gearboxes, the volume and weight can be reduced by 30% to 50%.

[0068] In addition, the planetary carrier output shaft and the spline spindle are installed with tapered roller bearings. The entire output shaft system is supported by two pairs of tapered bearings, which greatly improves the axial load-bearing capacity of the output shaft system and has strong anti-impact and vibration capabilities. The strength and rigidity of the planetary carrier output shaft are higher than the output shaft of the traditional rotary power head, and it is suitable for working conditions with heavy loads and large impacts.

[0069] The above descriptions are only some preferred embodiments of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned inventive concept. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in the embodiments of the present disclosure (but not limited to) and the technical solutions formed.

Claims

1. A rotary power head for a rotary drill, comprising: A parallel stage device comprising an input gear shaft (6), a main shaft gear (11) and a spline main shaft (12); A planetary stage device, comprising a planet carrier output main shaft (13), planetary gears (15) and a sun gear (17); Features: The input gear shaft (6) is connected to the hydraulic motor to realize the input of the power source, and the main shaft gear (11) is interference fit with the spline main shaft (12) and is meshed with the input gear shaft (6) at the same time to perform parallel stage transmission of the power head; The sun gear (17) is connected to the spline main shaft (12) to input parallel-stage power to the planetary stage. The planetary gear (15) is installed on the planetary carrier output main shaft (13), and the planetary gear (15) is meshed with the sun gear (17).

2. The rotary power head for a rotary drill according to claim 1, characterized in that: It comprises an upper box cover (1) and a main box body (2), wherein the input gear shaft (6) is installed between the upper box cover (1) and the main box body (2) via a bearing.

3. The rotary power head for a rotary drill according to claim 2, characterized in that: The upper end of the input gear shaft (6) is connected to the upper box cover (1) via a deep groove ball bearing (7), and the lower end of the input gear shaft (6) is connected to the main box body (2) via a spherical roller bearing (8).

4. The rotary power head for a rotary drill according to claim 1, characterized in that: The upper end of the input gear shaft (6) is processed with a first internal spline, and the first internal spline cooperates with the external spline shaft of the hydraulic motor.

5. The rotary power head for a rotary drill according to claim 2, characterized in that: The spline main shaft (12) is fixed in the main housing (2) via a first tapered roller bearing (9) and a second tapered roller bearing (10).

6. The rotary power head for a rotary drill according to claim 1, characterized in that: The upper end of the sun gear (17) is provided with an external spline, and the external spline cooperates with the second internal spline at the lower end of the spline main shaft (12).

7. The rotary power head for a rotary drill according to claim 1, characterized in that: There are a plurality of planetary wheels (15), and the plurality of planetary wheels (15) are all mounted on the planetary carrier output main shaft (13) via planetary wheel bearings and planetary wheel pin shafts (16).

8. The rotary power head for a rotary drill according to claim 1, characterized in that: It comprises an inner gear ring (3), and the planetary gear (15) meshes with the inner gear ring (3).

9. The rotary power head for a rotary drill according to claim 8, characterized in that: The inner gear ring (3) is mounted on the main housing (2) via stud bolts and / or pins.

10. The rotary power head for a rotary drill according to claim 1, characterized in that: The planet carrier output main shaft (13) is connected to the main housing (2) and the lower housing cover (4) respectively through a third tapered roller bearing (14a) and a fourth tapered roller bearing (14b).

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