Hollow swiveling head assembly of pile foundation pore-forming equipment

Abstract

The utility model discloses the technical field of mining mechanical equipment, and particularly relates to a hollow rotary head assembly of pile foundation hole forming equipment. Which comprises a straight gear column, a clamping sleeve assembly, a hydraulic motor, a clamping sleeve oil cylinder, a gearbox set, a plurality of wedge-shaped blocks, a small straight gear and a deep groove ball bearing, and is characterized in that the straight gear column is of a hollow body structure, and a plurality of open grooves are evenly formed in the straight gear column; the upper gear end of the straight gear column is arranged in the gear box set and meshed with the small straight gear surrounding the straight gear column, the straight gear column is sleeved with the clamping sleeve assembly, the clamping sleeve assembly slides in a matched mode through the wedge blocks, and the clamping sleeve assembly is connected with one end of the clamping sleeve oil cylinder. The other end of the clamping sleeve oil cylinder is installed on the gear box set, and therefore loosening and clamping of the wedge-shaped blocks can be achieved through stretching and retracting of the clamping sleeve oil cylinder. The annular distribution structure is reasonable and compact, clamping operation is simple through the clamping sleeve oil cylinders and the wedge blocks, and large torque can be provided through the three hydraulic motors.

Description

Technical Field

[0001] The invention relates to the technical field of mining machinery and equipment, and in particular to a hollow rotary head assembly of pile foundation hole-forming equipment. Background Art

[0002] The rotary power head is one of the key components in pile foundation drilling equipment. It drives the rotary drill rod to rotate the drill bit and provides propulsion to drive the drill rod downward to achieve the purpose of underground drilling. Generally speaking, the rotary power head consists of a motor, a gear transmission system and a hydraulic system, and the rotary head and the drill rod are fixed with a tapered thread connection. However, in the use scenarios of existing pile foundation drilling equipment, in order to clean the debris, the drill tool needs to be lifted up many times. With the traditional structural form of the rotary head, when lifting the drill tool, it is necessary to disassemble the long drill rods connected by multiple rods. This operation is cumbersome and frequent disassembly will waste time. In addition, frequent disassembly will also accelerate the wear of the drill rod. Therefore, we propose a hollow rotary head assembly that allows the drill rod to pass through and slide in the rotary head, thereby solving the problems of the traditional rotary head. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a hollow rotary head assembly for pile foundation drilling equipment, the technical solution of which is as follows:

[0004] A hollow rotary head assembly for pile foundation drilling equipment, comprising a spur gear column, a ferrule assembly, a hydraulic motor, a ferrule cylinder, a gear box assembly, a plurality of wedge blocks, a small spur gear and a deep groove ball bearing, characterized in that:

[0005] The spur gear column is a hollow body structure, and a plurality of slots are evenly distributed on the spur gear column. The gear end on the spur gear column is arranged in the gear box group and meshes with the small spur gear surrounding it. The ferrule assembly is sleeved on the spur gear column and slides through the cooperation of a plurality of the wedge blocks. The ferrule assembly is connected to one end of the ferrule cylinder, and the other end of the ferrule cylinder is installed on the gear box group, so that the loosening and clamping of the plurality of the wedge blocks can be achieved by the extension and contraction of the ferrule cylinder.

[0006] Further: the wedge block is slidably arranged in the slot on the spur gear column.

[0007] Further: the ferrule assembly includes an inner ferrule, an outer ferrule, a tapered roller bearing, a spacer, a ferrule cover and a plurality of wedge grooves, the inner ferrule is arranged on the upper side of the spur gear column gear end, the outer ferrule is arranged on the outside of the inner ferrule through the tapered roller bearing, the ferrule cover is arranged at the bottom of the outer ferrule, the spacer is arranged between the ferrule cover and the tapered roller bearing, the inner ferrule is evenly provided with a plurality of the wedge grooves, and the plurality of the wedge grooves correspond one-to-one with the plurality of the wedge blocks for limiting positioning.

[0008] Furthermore: the outer ferrule is evenly distributed with a plurality of cylinder mounting ear plates.

[0009] Furthermore: the spur gear column is connected around the hydraulic motor output shaft and is connected to a plurality of small spur gears installed in the gear box group to transmit torque.

[0010] Furthermore: the ferrule assembly and the rotating surface of the gear box assembly are both dust-proof and sealed.

[0011] The beneficial effects of the present invention are:

[0012] 1. The structure is reasonable and compact through the circular equidistant setting;

[0013] 2. The wedge block is pushed by the oil cylinder to clamp the drill rod, which is easy to operate;

[0014] 3. Hollow rotary head design, no need to frequently disassemble the rod when lifting the drilling tool during operation;

[0015] 4. Three evenly distributed hydraulic motors can provide high torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a partial cross-sectional view of the present invention;

[0018] Figure 3 It is a schematic diagram of a ferrule assembly of the present invention;

[0019] The names and serial numbers of the parts in the figure are: 1. Spur gear column; 2. Ferrule assembly; 21. Inner ferrule; 22. Outer ferrule; 23. Tapered roller bearing; 24. Spacer; 25. Ferrule cover; 26. Wedge groove; 3. Hydraulic motor; 4. Ferrule cylinder; 5. Gear box assembly; 6. Wedge block; 7. Small spur gear; 8. Deep groove ball bearing. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-3A hollow rotary head assembly of pile foundation drilling equipment includes a spur gear column 1, a ferrule assembly 2, a hydraulic motor 3, a ferrule cylinder 4, a gear box group 5, a wedge block 6, a small spur gear 7 and a deep groove ball bearing 8. The upper side of the rod body of the spur gear column 1 is slidably connected with the ferrule assembly 2, and the outer side of the gear end at the bottom of the spur gear column 1 is sleeved with a gear box group 5. Three hydraulic motors 3 are installed in a ring around the spur gear column 1 on the top of the gear box group 5. Three ferrule cylinders 4 are installed in a ring around the spur gear column 1 on the top of the gear box group 5 and are connected to the outer wall of the ferrule assembly 2. The ferrule cylinders 4 are all located between the gaps between the two hydraulic motors 3. The output shaft of the hydraulic motor 3 passes through the gear box group 5 and is connected to the small spur gear. Gear 7, there are three small spur gears 7 installed in an annular rotation around the spur gear column 1, the upper gear end of the spur gear column 1 is installed in the gear box group 5 and meshes with the three small spur gears 7 around it, the spur gear column 1 is a hollow body structure, and six grooves are opened at an annular distance on the upper side of the rod body of the spur gear column 1, and wedge blocks 6 are slidably installed in the grooves; the ferrule assembly 2 and the rotating surface of the gear box group 5 are both dust-proof and sealed, the output shaft of the hydraulic motor 3 is connected to the small spur gear 7 to transmit torque, the ferrule assembly 2 is guided on the spur gear column 1 to slide in cooperation with the wedge block 6, and the wedge block 6 can be loosened and clamped by the expansion and contraction of the ferrule cylinder 4 and the movement of the ferrule assembly 2.

[0022] Specifically: the ferrule assembly 2 includes an inner ferrule 21, an outer ferrule 22, a tapered roller bearing 23, a spacer 24, a ferrule cover 25, and a wedge groove 26. The inner ferrule 21 is sleeved on the upper side of the rod body of the spur gear column 1. The outer ferrule 22 is installed on the outer side of the inner ferrule 21 through the tapered roller bearings 23 symmetrically installed on the upper and lower sides. The outer wall of the outer ferrule 22 is annularly provided with three cylinder mounting ear plates. The three cylinder mounting ear plates are rotatably connected to the rod body of the ferrule cylinder 4. The inner ferrule A ferrule cover 25 is installed at the bottom of the sleeve 21 and the outer ferrule 22 through a spacer 24. Six wedge-shaped grooves 26 are annularly opened on the lower side of the inner wall of the inner ferrule 21. The wedge-shaped grooves 26 correspond to the wedge blocks 6 and cooperate with each other one by one; the ferrule cylinder 4 expands and contracts to drive the outer ferrule 22 to move up and down on the spur gear column 1, thereby causing the inner ferrule 21 to move up and down on the spur gear column 1. The inner ferrule 21 moves up and down, thereby causing the wedge grooves 26 to move up and down to loosen and clamp the wedge blocks 6.

[0023] The working principle and use method of the hollow rotary head assembly of a pile foundation hole forming equipment of the present invention are as follows:

[0024] The rotary head assembly transmits torque to the small spur gear 7 through multiple hydraulic motors 3 fixed on the gear box group 5. The small spur gear 7 meshes with the spur gear column 1, and the torque is transmitted to the spur gear column 1, which in turn drives the drill rod to rotate; the ferrule assembly 2 can be made to slide on the spur gear column 1 through the ferrule cylinder 4, so that the wedge block 6 can be extended and retracted to achieve the purpose of clamping and loosening the drill rod; when lifting the drilling tool, the drill rod can pass through the rotary head and slide upward without disassembling the drill rod.

[0025] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A hollow rotary head assembly for pile foundation drilling equipment, comprising a spur gear column (1), a ferrule assembly (2), a hydraulic motor (3), a ferrule cylinder (4), a gear box assembly (5), a plurality of wedge blocks (6), a small spur gear (7) and a deep groove ball bearing (8), characterized in that: The spur gear column (1) is a hollow structure. A plurality of slots are evenly distributed on the spur gear column (1). The gear end on the spur gear column (1) is arranged in the gear box assembly (5) and meshes with the small spur gear (7) surrounding it. The clamping sleeve assembly (2) is sleeved on the spur gear column (1) and slides in cooperation with a plurality of wedge blocks (6). The clamping sleeve assembly (2) is connected to one end of the clamping sleeve cylinder (4), and the other end of the clamping sleeve cylinder (4) is installed on the gear box assembly (5), so that the plurality of wedge blocks (6) can be loosened and clamped by the extension and contraction of the clamping sleeve cylinder (4).

2. The hollow rotary head assembly of pile foundation drilling equipment according to claim 1 is characterized by: The wedge block (6) is slidably arranged in a slot on the spur gear column (1).

3. The hollow rotary head assembly of pile foundation drilling equipment according to claim 1 is characterized by: The ferrule assembly (2) comprises an inner ferrule (21), an outer ferrule (22), a tapered roller bearing (23), a spacer (24), a ferrule cover (25) and a plurality of wedge grooves (26); the inner ferrule (21) is arranged on the upper side of the gear end of the spur gear column (1); the outer ferrule (22) is arranged on the outside of the inner ferrule (21) through the tapered roller bearing (23); the ferrule cover (25) is arranged at the bottom of the outer ferrule (22); the spacer (24) is arranged between the ferrule cover (25) and the tapered roller bearing (23); the inner ferrule (21) is evenly provided with a plurality of wedge grooves (26); the plurality of wedge grooves (26) correspond one-to-one with the plurality of wedge blocks (6) for limiting positioning.

4. The hollow rotary head assembly of pile foundation drilling equipment according to claim 3 is characterized by: The outer ferrule (22) is evenly distributed with a plurality of oil cylinder mounting ear plates.

5. The hollow rotary head assembly of pile foundation drilling equipment according to claim 1 is characterized by: The spur gear column (1) is connected around the output shaft of the hydraulic motor (3) and is connected to a plurality of small spur gears (7) installed in the gear box group (5) to transmit torque.

6. The hollow rotary head assembly of pile foundation drilling equipment according to claim 1, characterized in that: The rotating surfaces of the ferrule assembly (2) and the gear box assembly (5) are both subjected to dustproof sealing treatment.

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