Power head of drilling machine

Abstract

The utility model provides a drilling machine power head which comprises a base and a plurality of gear boxes arranged on the base, a shaft hole is formed in the base, a main shaft located on the outer layer and a fiber tail located on the inner layer are arranged in the shaft hole, a center gear is arranged on the main shaft in a sleeved mode, and gear shafts meshed with the center gear are arranged in the gear boxes. A hydraulic motor is arranged on one side of the gearbox, the gear shaft is in transmission connection with the hydraulic motor, transmission tooth surfaces matched with each other are arranged on the inner surface of the main shaft and the outer surface of the fiber tail, a hydraulic hammer is arranged at the second end of the shaft hole, and an output shaft of the hydraulic hammer extends into the shaft hole and is in contact with the fiber tail; a spring groove is formed in the first end of the shaft hole, and a spring is arranged in the spring groove. The operation stability is improved, the situation that the whole structure is damaged due to long-term impact vibration operation is avoided, and meanwhile disassembly and maintenance are convenient.

Description

Technical Field

[0001] This utility model relates to the field of drilling rigs for pile hole operations, and in particular to a drilling rig power head. Background Technology

[0002] Piling drill rigs are specialized mechanical equipment widely used in the construction of water wells and pile holes. They are widely used in water well construction in water-scarce areas, air conditioning well drilling in ground source heat pump technology, and the construction of pile holes for high-rise building foundations and bridge foundations in urban construction. The drill head, as the core output component of the piling drill rig, primarily converts the hydraulic energy generated by the power source into mechanical energy, transmitting the resulting torque, speed, and impact force to the drill rod. Typically, the drill head uses a hydraulic motor to provide speed and torque, and a hydraulic hammer to provide impact force. However, the structural arrangement of the drill rod is not ideal, resulting in decreased reliability and reduced service life, requiring further improvement. Utility Model Content

[0003] The purpose of this utility model is to provide a drilling rig power head with a reasonable structural layout, high reliability, and long service life, in order to address the shortcomings of the above-mentioned background technology.

[0004] To achieve the above objectives, this utility model provides a drilling rig power head, including a base and multiple gearboxes disposed on the base. The base is provided with a shaft hole, in which a main shaft located on the outer layer and a fiber tail located on the inner layer are disposed. A central gear is sleeved on the main shaft. A gear shaft meshing with the central gear is disposed in the gearbox. A hydraulic motor is disposed on one side of the gearbox. The gear shaft is connected to the hydraulic motor for transmission. The inner surface of the main shaft and the outer surface of the fiber tail are provided with mutually mating transmission tooth surfaces. A hydraulic hammer is disposed at the second end of the shaft hole. The output shaft of the hydraulic hammer extends into the interior of the shaft hole and contacts the fiber tail.

[0005] A spring groove is provided at the first end of the shaft hole, and a spring is provided in the spring groove. One end of the spring is connected to the inner wall of the shaft hole, and the other end of the spring is connected to the pad block. When the hydraulic hammer drives the fiber tail, the spring provides elastic buffering for the impact vibration of the fiber tail.

[0006] Furthermore, both the spring and the pad are sleeved on the fiber tail.

[0007] Furthermore, a detachable spring cap is provided at the first end of the shaft hole, and the spring cap is connected to the base by mounting bolts.

[0008] Furthermore, the spring cap is connected to a removable dust cover, which is used to prevent dust from entering the spring groove.

[0009] Furthermore, a rotary bearing is provided at both the first and second ends of the shaft hole, and the rotary bearing is used to support the rotation of the main shaft.

[0010] Furthermore, a thrust bearing is also provided between the rotary bearing and the central gear.

[0011] Furthermore, the gearbox and the hydraulic motor are arranged in three sets, and are distributed at equal angular intervals relative to the center line of the fiber tail.

[0012] The above-mentioned solution of this utility model has the following beneficial effects:

[0013] The drilling rig power head provided by this utility model is capable of rotary drilling and impact vibration operation based on the hydraulic motor and hydraulic hammer. The setting of multiple gear transmission structure ensures the strength and stability of torque transmission. The setting of spring can buffer the impact vibration. The setting of multiple types of bearings further improves the stability of operation and avoids damage to the overall structure due to long-term impact vibration operation. At the same time, it is easy to disassemble and maintain.

[0014] Other beneficial effects of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the main shaft structure of this utility model;

[0017] Figure 3 This is a side view of the overall structure of this utility model.

[0018] [Explanation of Labels in the Attached Image]

[0019] 1-Base; 2-Gearbox; 3-Main shaft; 4-Fiber tail; 5-Center gear; 6-Gear shaft; 7-Hydraulic motor; 8-Transmission tooth surface; 9-Spring groove; 10-Spring; 11-Padded block; 12-Hydraulic hammer; 13-Spring cover; 14-Dust cover; 15-Rotating bearing; 16-Thrust bearing. Detailed Implementation

[0020] To make the technical problems, solutions, and advantages of this utility model clearer, a detailed description will be provided below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a locking connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of 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.

[0023] like Figure 1 , Figure 2 As shown, an embodiment of this utility model provides a drilling rig power head, including a base 1 and multiple gearboxes 2 mounted on the base 1. The base 1 has a shaft hole, within which a main shaft 3 (outer layer) and a spur tail 4 (inner layer) of the drill rod are mounted. The main shaft 3 is rotatable relative to the shaft hole. A central gear 5 is mounted on the main shaft 3. A gear shaft 6 meshes with the central gear 5 within each gearbox 2, and the gear shaft 6 is connected to a hydraulic motor 7. Therefore, the hydraulic motor 7 drives the main shaft 3 to rotate. Both the inner surface of the main shaft 3 and the outer surface of the spur tail 4 are provided with mating transmission tooth surfaces 8, so that the rotation of the main shaft 3 drives the spur tail 4 to rotate, and the spur tail 4 can generate a certain displacement relative to the axial direction of the main shaft 3.

[0024] In this embodiment, a spring groove 9 is provided at the first end of the shaft hole of the base 1, and a spring 10 is provided inside the spring groove 9. One end of the spring 10 is connected to the inner wall of the shaft hole (or a pad can be provided), and the other end is connected to the pad 11. Under the elastic force of the spring 10, the pad 11 moves to contact the shoulder of the fiber tail 4, and applies an elastic force to the fiber tail 4 to move the shoulder to contact the end face of the main shaft 3. A hydraulic hammer 12 is provided at the second end of the shaft hole. The output shaft of the hydraulic hammer 12 extends into the shaft hole and can contact the fiber tail 4 to drive the fiber tail 4 to perform impact vibration operation. It can be understood that during the process of the hydraulic hammer 12 driving the fiber tail 4, the fiber tail 4 will be displaced, causing the shoulder to separate from the end face of the main shaft 3. At the same time, the spring 10 can provide elastic buffering for the impact vibration of the fiber tail 4, avoiding excessive impact force and vibration that would lead to poor operational stability, and also avoiding affecting the service life of other structures of the drilling rig power head.

[0025] It should be noted that in this embodiment, the spring 10 is sleeved on the fiber tail 4, and the pad 11 is also sleeved on the fiber tail 4 in a ring-shaped arrangement. This does not affect the rotational drilling of the fiber tail 4; the spring 10 provides a buffering effect. Obviously, the spring 10 is a consumable part that needs frequent replacement. Therefore, in this embodiment, a removable spring cap 13 is provided at the first end of the shaft hole of the base 1. The spring cap 13 is connected to the base 1 by mounting bolts to facilitate disassembly and replacement of the spring 10. The interior of the spring cap 13 is the spring groove 9. In a preferred embodiment, a removable dust cover 14 is further provided at the front end of the spring cap 13 to prevent dust from entering the spring groove 9 and affecting the performance of the spring 10.

[0026] In a preferred embodiment, both the first and second ends of the shaft hole are provided with rotary bearings 15. The rotary bearings 15 provide rotational support for the main shaft 3, making the rotation and transmission of the main shaft 3 smoother. At the same time, thrust bearings 16 are provided between the two sets of rotary bearings 15 and the central gear 5, and pads 11 are also provided at the contact points between the thrust bearings 16 and the central gear 5, thereby protecting the central gear 5 and preventing it from being displaced, loosened, or damaged due to long-term impact and vibration on the fiber tail 4 and the main shaft 3.

[0027] At the same time, such as Figure 3 As shown, in a preferred embodiment, the gearbox 2 and hydraulic motor 7 are provided in three sets, and are distributed at equal angular intervals (90 degrees) relative to the center line of the fiber tail 4. The three sets of hydraulic motors 7 can provide greater and more stable torque to the fiber tail 4, further improving the working performance of the drilling rig.

[0028] In summary, the drilling rig power head provided in this embodiment, based on the hydraulic motor 7 and hydraulic hammer 12, can perform rotary drilling and impact vibration operations. The multiple gear transmission structure ensures the strength and stability of torque transmission. The spring 10 provides a buffering effect against impact vibration. The multiple types of bearings further improve the stability of operation and prevent the overall structure from being damaged by long-term impact vibration operations. At the same time, it is easy to disassemble and maintain.

[0029] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0030] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A drilling rig power head, characterized in that, The device includes a base and multiple gearboxes mounted on the base. The base has a shaft hole, in which a main shaft is located on the outer layer and a fiber tail is located on the inner layer. A central gear is mounted on the main shaft. A gear shaft meshing with the central gear is located in each gearbox. A hydraulic motor is located on one side of the gearbox. The gear shaft is connected to the hydraulic motor for transmission. The inner surface of the main shaft and the outer surface of the fiber tail are provided with mutually cooperating transmission tooth surfaces so that the rotation of the main shaft can drive the fiber tail to rotate, and the fiber tail can generate a certain displacement relative to the axial direction of the main shaft. A hydraulic hammer is located at the second end of the shaft hole, and the output shaft of the hydraulic hammer extends into the interior of the shaft hole and contacts the fiber tail. A spring groove is provided at the first end of the shaft hole, and a spring is provided in the spring groove. One end of the spring is connected to the inner wall of the shaft hole, and the other end of the spring is connected to the pad block. When the hydraulic hammer drives the fiber tail, the spring generates an elastic buffering effect on the impact vibration of the fiber tail. Both the first and second ends of the shaft hole are provided with rotary bearings, which are used to support the rotation of the main shaft; a thrust bearing is also provided between the rotary bearing and the central gear. A detachable spring cover is provided at the first end of the shaft hole, and the spring cover is connected to the base by mounting bolts; the spring cover is connected to a detachable dust cover, which is used to prevent dust from entering the spring groove.

2. The drilling rig power head according to claim 1, characterized in that, Both the spring and the pad are fitted onto the fiber tail.

3. A drilling rig power head according to any one of claims 1-2, characterized in that, The gearbox and the hydraulic motor are arranged in three sets, and are distributed at equal angular intervals relative to the center line of the fiber tail.

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