Connection transmission structure for power head main shaft and fiber tail of drilling machine

Abstract

The utility model provides a drilling machine power head main shaft and fiber tail connection transmission structure which comprises a fiber tail, a main shaft and a base, the fiber tail and the main shaft are both arranged in a shaft hole formed in the base, the main shaft is located on the outer layer, the fiber tail is located on the inner layer, and the fiber tail is matched with the main shaft. The main shaft comprises a first connecting section and a second connecting section, the first connecting section is provided with an inner tooth surface, the second connecting section is provided with an outer tooth surface, a tooth groove is formed in the position, corresponding to the first connecting section, of the fiber tail, a key rod is arranged in the tooth groove, and the second connecting section is connected with the gear set through the outer tooth surface. According to the utility model, the main shaft is matched with the tooth surface of the fiber tail, so that the reliable and stable transmission of torque is ensured, the transmission of the fiber tail during the impact vibration operation is ensured, and the operation stability is further improved through the arrangement of the buffer spring, the bearing and the like; the damage of other structures of the drilling machine power head caused by overlarge load is avoided, and the long-term use reliability and the service life of the drilling machine power head are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pile hole drilling rigs, in particular to a transmission structure connecting a main shaft of a drilling rig power head and a fiber tail. Background Art

[0002] A pile hole drilling rig is a specialized piece of machinery widely used in the construction of water wells and pile holes. It is widely used in the construction of water wells in water-scarce areas, the drilling of air-conditioning wells in ground-source heat pump technology, and the construction of pile holes for high-rise building foundations and bridge foundations in urban construction. As the core output component of a pile hole drilling rig, the drill head converts the hydraulic energy generated by the power source into mechanical energy, transmitting the resulting torque, speed, and impact force to the drill pipe. This includes providing speed and torque through a hydraulic motor and providing impact force through a hydraulic hammer. Traditional drill heads have a poorly designed transmission structure connecting the fiber tail of the drill pipe to the main shaft, resulting in low reliability and service life, requiring further improvement. Utility Model Content

[0003] The purpose of the utility model is to address the deficiencies in the above-mentioned background technology and to provide a main shaft and fiber tail connection transmission structure with a more reasonable arrangement, higher reliability and longer service life.

[0004] In order to achieve the above-mentioned object, the utility model provides a transmission structure for connecting the main shaft of a drilling rig power head with a fiber tail, comprising a fiber tail, a main shaft, and a base, wherein the fiber tail and the main shaft are both arranged in an axial hole opened in the base, the main shaft is located in the outer layer, the fiber tail is located in the inner layer, and the fiber tail cooperates with the main shaft;

[0005] The main shaft includes a first connecting section and a second connecting section, the first connecting section is provided with an inner tooth surface, the second connecting section is provided with an outer tooth surface, the position of the fiber tail corresponding to the first connecting section is provided with a tooth groove, a key rod is provided in the tooth groove, and the second connecting section is connected to the gear set through the outer tooth surface;

[0006] An inner shoulder is provided between the first connecting section and the second connecting section, a washer is provided at the position of the inner shoulder, a spring groove is provided in the axial hole, a buffer spring and a pad are provided in the spring groove, one end of the buffer spring is connected to the inner wall of the spring groove, and the other end is connected to the pad, so that the pad can elastically limit the fiber tail.

[0007] Furthermore, a hydraulic hammer is provided at the rear end of the fiber tail, and an output shaft of the hydraulic hammer extends into the shaft hole and contacts the fiber tail.

[0008] Furthermore, a sliding guide block is sleeved on the fiber tail, and the cushion block is in contact with the sliding guide block.

[0009] Furthermore, the second connecting section of the main shaft is sleeved with a central gear, and a plurality of gear boxes are provided on the base. A gear shaft meshing with the central gear is provided in the gear box, and the gear shaft is transmission-connected to a hydraulic motor provided on one side of the gear box.

[0010] Furthermore, needle bearings are provided at both ends of the shaft hole, and the needle bearings rotatably support the main shaft.

[0011] Furthermore, a cylindrical roller bearing is provided between the needle roller bearing and the central gear, and the cylindrical roller bearing is used to provide axial protection for the central gear.

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

[0013] The transmission structure connecting the main shaft of the drilling rig power head and the fiber tail provided by the utility model ensures reliable and stable transmission of torque through the tooth surface cooperation between the main shaft and the fiber tail, and at the same time ensures transmission when the fiber tail requires axial displacement for impact and vibration operations. In addition, the provision of buffer springs, bearings, etc. further improves the stability of the operation, avoids damage to other structures of the drilling rig power head caused by excessive load, and improves the long-term reliability and service life of the drilling rig power head.

[0014] Other beneficial effects of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0017] Figure 3 This is a cross-sectional view of the structure of the fiber tail corresponding to the first connecting section of the present invention.

[0018] [Description of Reference Numerals]

[0019] 1-fiber tail; 2-main shaft; 3-base; 4-inner tooth surface; 5-outer tooth surface; 6-tooth groove; 7-key rod; 8-washer; 9-buffer spring; 10-pad; 11-sliding guide block; 12-hydraulic hammer; 13-center gear; 14-gearbox; 15-gear shaft; 16-hydraulic motor; 17-needle roller bearing; 18-cylindrical roller bearing. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will be described in detail with reference to the accompanying drawings and specific embodiments. Obviously, the embodiments described are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In addition, the technical features involved in the different embodiments of the present invention 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 positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on 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 expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to a locking connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0023] like Figure 1 As shown, an embodiment of the present invention provides a transmission structure for connecting a main shaft of a drilling rig power head with a fiber tail, comprising a fiber tail 1 and a main shaft 2. The fiber tail 1 and the main shaft 2 are both disposed within an axial hole of a base 3, with the main shaft 2 located in the outer layer and the fiber tail 1 located in the inner layer. A transmission tooth surface that cooperates with each other is provided between the fiber tail 1 and the main shaft 2, so that the main shaft 2 rotates and the fiber tail 1 can be driven to rotate synchronously.

[0024] As shown in the figure, the main shaft 2 in this embodiment includes a first connecting section and a second connecting section. The first connecting section is provided with an inner tooth surface 4 that is recessed inwardly, and the second connecting section is provided with an outer tooth surface 5 that is protruding outwardly. The first connecting section is used to connect to the fiber tail 1, and the second connecting section is used to connect to the gear set, so that torque can be transmitted to the main shaft 2 through the gear set, and then transmitted to the fiber tail 1 through the main shaft 2. A tooth groove 6 is provided at the position of the fiber tail 1 corresponding to the first connecting section, and a key rod 7 is placed in the tooth groove 6 to ensure that the tooth groove 6 rotates synchronously with the inner tooth surface 4, that is, the fiber tail 1 rotates synchronously with the main shaft 2.

[0025] It should be noted that in this embodiment, the inner surface of the second connecting section of the main shaft 2 is a smooth cylindrical surface, an inner shoulder is provided between the first connecting section and the second connecting section, and a washer 8 is provided at the position of the inner shoulder to limit the fiber tail 1 and prevent the tooth groove 6 of the fiber tail 1 from entering the position of the second connecting section. In another direction, in this embodiment, a spring groove is provided in the axial hole of the base 3, and a buffer spring 9 and a pad 10 are provided in the spring groove. One end of the buffer spring 9 is connected to the inner wall of the spring groove, and the other end is connected to the pad 10, so that the sliding guide block 11 sleeved on the fiber tail 1 is elastically limited by the pad 10. Since the sliding guide block 11 is limited by the relative protrusion of the tooth groove 6 of the fiber tail 1, the pad 10 can elastically limit the fiber tail 1.

[0026] A hydraulic hammer 12 is provided at the rear end of the fiber tail 1. The output shaft of the hydraulic hammer 12 extends into the interior of the axial hole and is capable of contacting the fiber tail 1 to drive the fiber tail 1 to perform impact and vibration operations. It is understandable that during the process of the hydraulic hammer 12 driving the fiber tail 1, the fiber tail 1 will produce a certain displacement, causing the buffer spring 9 to compress. The buffer spring 9 can provide an elastic buffering effect on the impact and vibration of the fiber tail 1, thereby avoiding poor operational stability caused by excessive impact force and vibration, and at the same time avoiding affecting the service life of other structures of the drilling rig power head. Based on the arrangement of the tooth groove 6, the internal tooth surface 4, and the key rod 7, the fiber tail 1 can still maintain synchronous rotation with the main shaft 2 when displaced within the aforementioned limit range.

[0027] It should be noted that in this embodiment, the gasket 10 and the sliding guide block 11 are both configured to be annular and sleeved on the fiber tail 1. The spring groove and the buffer spring 9 can be configured to be annular and sleeved on the fiber tail 1, or they can be configured to be columnar and distributed around the fiber tail 1. No specific restrictions are made here.

[0028] In this embodiment, the second connecting section of the main shaft 2 is sleeved with a central gear 13, which is connected to the connecting hole of the central gear 13 via the external tooth surface 5 to maintain synchronous rotation. Multiple gear boxes 14 are mounted on the base 3. These contain gear shafts 15 that mesh with the central gear 13. These gear shafts 15 are also connected in a transmission connection to a hydraulic motor 16 mounted on one side of the gear box 14. This drives the main shaft 2, enhancing the strength and stability of torque transmission.

[0029] As a preferred embodiment, needle roller bearings 17 are provided at both ends of the shaft hole in this embodiment. These needle roller bearings 17 provide rotational support for the spindle 2, ensuring smoother rotation and transmission of the spindle 2. Furthermore, cylindrical roller bearings 18 are provided between the two sets of needle roller bearings 17 and the center gear 13. Spacers 19 are also provided at the locations where these bearings contact the center gear 13, providing axial protection for the center gear 13 and preventing it from becoming loose or damaged due to long-term impact and vibration between the fiber tail 1 and the spindle 2.

[0030] The transmission structure for connecting the main shaft of the drill rig power head and the fiber tail provided in this embodiment ensures reliable and stable transmission of torque through the tooth surface cooperation between the main shaft 2 and the fiber tail 1, and at the same time ensures the transmission when the fiber tail 1 requires axial displacement for impact and vibration operations. In addition, the stability of the operation is further improved by the provision of buffer springs 9, bearings, etc., avoiding damage to other structures of the drill rig power head caused by excessive load, and improving the long-term reliability and life of the drill rig power head.

[0031] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, 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.

[0032] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A transmission structure for connecting the main shaft of a drilling rig power head with a fiber tail, characterized in that: It includes a fiber tail, a main shaft, and a base, wherein the fiber tail and the main shaft are both arranged in an axial hole opened in the base, the main shaft is located in the outer layer, the fiber tail is located in the inner layer, and the fiber tail is matched with the main shaft; The main shaft includes a first connecting section and a second connecting section, the first connecting section is provided with an inner tooth surface, the second connecting section is provided with an outer tooth surface, the position of the fiber tail corresponding to the first connecting section is provided with a tooth groove, a key rod is provided in the tooth groove, and the second connecting section is connected to the gear set through the outer tooth surface; An inner shoulder is provided between the first connecting section and the second connecting section, a washer is provided at the position of the inner shoulder, a spring groove is provided in the axial hole, a buffer spring and a pad are provided in the spring groove, one end of the buffer spring is connected to the inner wall of the spring groove, and the other end is connected to the pad, so that the pad can elastically limit the fiber tail.

2. A transmission structure for connecting the main shaft of a drilling rig power head with a fiber tail according to claim 1, characterized in that: A hydraulic hammer is provided at the rear end of the fiber tail, and an output shaft of the hydraulic hammer extends into the shaft hole and contacts the fiber tail.

3. The transmission structure for connecting the main shaft of a drilling rig power head with a fiber tail according to claim 1, characterized in that: A sliding guide block is sleeved on the fiber tail, and the pad is in contact with the sliding guide block.

4. The transmission structure for connecting the main shaft of a drilling rig power head with a fiber tail according to claim 1, characterized in that: The second connecting section of the main shaft is sleeved with a central gear, and a plurality of gear boxes are provided on the base. A gear shaft meshing with the central gear is provided in the gear box, and the gear shaft is transmission-connected to a hydraulic motor provided on one side of the gear box.

5. The transmission structure for connecting the main shaft of a drilling rig power head with a fiber tail according to claim 4, characterized in that: Needle bearings are provided at both ends of the shaft hole, and the needle bearings support the main shaft for rotation.

6. The transmission structure for connecting the main shaft of a drilling rig power head with a fiber tail according to claim 5, characterized in that: A cylindrical roller bearing is provided between the needle roller bearing and the central gear, and the cylindrical roller bearing is used to provide axial protection for the central gear.

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