A polygonal socket type spindle drill collar connection structure for downhole drilling boxes

Abstract

A polygonal socket type main shaft drill sleeve connecting structure for downhole drilling box belongs to the technical field of coal mine underground tunneling equipment, including the drill box shell 10, the hole of drill box shell 10 installs the main shaft 20, the main shaft 20 is connected with the drill sleeve 50 through the pin 30, the drill sleeve 50 can transmit torque to the drill rod 60, the main shaft 20 sets up the second shaft section 22, the section of second shaft section 22 is polygonal, and the second shaft section 22 is connected with the second sleeve section 52 of drill sleeve 50, and the second shaft section 22 can transmit torque to the second sleeve section 52.The utility model has solved the problems of thread loosening, integral replacement cost and the like in traditional structure.

Description

Technical Field

[0001] This utility model relates to the technical field of underground tunneling equipment in coal mines, and in particular to a polygonal socket-type spindle drill sleeve connection structure for underground drill boxes. Background Technology

[0002] Drill bushings are widely used in underground coal mine tunneling for rock support operations. The drill bushing drives the drill rod to rotate, enabling rapid drilling of holes such as anchor bolt holes. The drill rod is typically a hollow, externally hexagonal structure, while the drill bushing has an internally hexagonal hole that mates with the drill rod. Due to the complex underground working environment, coal dust, silt, and other impurities can easily get into the drill rod and drill bushing during drilling, causing corrosion and wear on the hexagonal mating surface. This leads to drill rod vibration, reduced drilling stability, and in severe cases, even cracking of the drill bushing or damage to the spindle.

[0003] Currently, there are two main types of connection structures between the spindle and the drill bushing: The threaded connection involves the drill bushing being threaded onto the spindle. This structure is suitable for unidirectional rotational operations, but in situations requiring alternating forward and reverse rotation, the threaded connection carries a risk of loosening, and after a period of use, the threaded parts tend to jam, making disassembly difficult and affecting maintenance efficiency. The integral structure involves machining the spindle and drill bushing as a single unit, but when the drill bushing wears down, the entire spindle needs to be replaced, resulting in high maintenance costs and long downtime.

[0004] Therefore, there is an urgent need to develop a polygonal socket-type spindle drill sleeve connection structure for downhole drill boxes that balances reliability and ease of maintenance under high-frequency operation. Summary of the Invention

[0005] In order to overcome the above-mentioned technical defects, this utility model provides a polygonal socket-type spindle drill sleeve connection structure for downhole drill boxes, so as to solve at least one technical problem existing in the background art.

[0006] This utility model provides the following technical solution: (Refer to...) Figure 1-2 As shown, a polygonal socket-type spindle drill sleeve connection structure for a downhole drill box includes a drill box housing 10, a spindle 20 installed in a hole in the drill box housing 10, the spindle 20 being connected to a drill sleeve 50 via a pin 30, the drill sleeve 50 being able to transmit torque to the drill rod 60, the spindle 20 being provided with a second shaft section 22, the cross section of the second shaft section 22 being polygonal, the second shaft section 22 being mated and connected with the second sleeve section 52 of the drill sleeve 50, the second shaft section 22 being able to transmit torque to the second sleeve section 52.

[0007] Furthermore, the drill sleeve 50 is provided with an inner hole that mates with the drill rod 60, which has a polygonal cross-section, and the second sleeve segment 52 is provided with an inner hole that mates with the second shaft segment 22, which has a polygonal cross-section.

[0008] Furthermore, the main shaft 20 is also provided with a third shaft section 23, on which a sealing ring groove 26 is provided, and the sealing ring groove 26 accommodates a sealing ring 40 for sealing.

[0009] Furthermore, the spindle 20 is also provided with a first shaft section 21, which is connected to the first sleeve section 51 of the drill sleeve 50 to achieve coaxiality between the spindle 20 and the drill sleeve 50.

[0010] Furthermore, the spindle 20 is also provided with a spindle end face 24 that contacts the end face of the drill rod 60, for axially constraining the drill rod 60.

[0011] Furthermore, the polygons include quadrilaterals, hexagons, and octagons.

[0012] Furthermore, several pins 30 are provided on the main shaft 20.

[0013] Furthermore, the pins 30 are arranged symmetrically.

[0014] Furthermore, the spindle 20 is provided with an end face, which contacts the bottom end of the drill sleeve 50 to constrain the drill sleeve 50 in the axial direction.

[0015] Furthermore, the pin 30 is a flexible pin.

[0016] The technical effects and advantages of this utility model are as follows: The polygonal socket-type spindle drill sleeve connection structure for downhole drill boxes provided by this utility model solves the problems of loose threads and high cost of integral replacement in traditional structures. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall design of this utility model.

[0018] Figure 2 This is a schematic diagram of the pin connection of this utility model.

[0019] Among them, 10 is the drill box housing; 20 is the spindle; 21 is the first shaft section; 22 is the second shaft section; 23 is the third shaft section; 24 is the spindle end face; 25 is the spindle pin groove; 26 is the sealing ring groove; 30 is the pin; 40 is the sealing ring; 50 is the drill bushing; 51 is the first sleeve section; 52 is the second sleeve section; 53 is the third sleeve section; 54 is the drill bushing pin groove; and 60 is the drill rod. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. This utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] Reference Figure 1-2 As shown, this utility model provides a polygonal socket-type spindle drill sleeve connection structure for downhole drill boxes, including a drill box housing 10, a spindle 20 installed in the hole of the drill box housing 10, the spindle 20 being connected to the drill sleeve 50 via a pin 30, and the drill sleeve 50 having a hexagonal inner hole that engages with a hexagonal drill rod 60 and can drive the drill rod 60 to rotate.

[0022] A sealing ring 40 is provided between the spindle 20 and the drill bushing 50 for sealing.

[0023] The spindle 20 is provided with an end face, which contacts the bottom end of the drill sleeve 50 and can counteract the axial force on the drill sleeve 50.

[0024] The spindle 20 is provided with a first shaft section 21, which is transitionally fitted with the first sleeve section 51 of the drill sleeve 50 to achieve coaxiality between the spindle 20 and the drill sleeve 50.

[0025] The second shaft segment 22 is connected to the first shaft segment 21. The cross-section of the second shaft segment 22 is polygonal, including quadrilaterals, hexagons, and octagons. The second sleeve segment 52 of the drill sleeve 50 is provided with an inner hole with a polygonal cross-section. The second shaft segment 22 and the second sleeve segment 52 are connected. The second shaft segment 22 is provided with a spindle pin groove 25, and the second sleeve segment 52 is provided with a drill sleeve pin groove 54. The spindle pin groove 25 and the drill sleeve pin groove 54 are used to accommodate the pin 30. The axis of the spindle pin groove 25 is parallel to the side of the polygonal cross-section of the second shaft segment 22. Several spindle pin grooves 25 are symmetrically arranged. The pin 30 is an elastic pin. The pin 30 is used to fix the axial position of the spindle 20 and the drill sleeve 50 to prevent the drill sleeve 50 from moving.

[0026] The third shaft section 23 is connected to the second shaft section 22. The third shaft section 23 is connected to the third sleeve section 53 of the drill sleeve 50. A sealing ring groove 26 is provided on the third shaft section 23. The sealing ring groove 26 contains a sealing ring 40 for sealing.

[0027] The spindle end face 24 is connected to the third shaft section 23, and the spindle end face 24 contacts the end face of the drill pipe 60 to counteract the axial force of the drill pipe 60.

[0028] Workflow: After the drill bushing 50 is fitted onto the spindle 20 and the drill rod 60, the insertion pin 30 positions the spindle 20 and the drill bushing 50. The spindle 20 transmits torque to the drill bushing 50 through the second shaft segment 22 with a polygonal cross section, and the drill bushing 50 transmits torque to the drill rod 60 through the inner hole with a hexagonal cross section.

[0029] It should be understood that, firstly, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A polygonal socket-type spindle drill sleeve connection structure for downhole drill boxes, characterized in that: The system includes a drill housing (10), in which a spindle (20) is installed. The spindle (20) is connected to a drill bushing (50) via a pin (30). The drill bushing (50) can transmit torque to the drill rod (60). The spindle (20) is provided with a second shaft section (22). The cross-section of the second shaft section (22) is polygonal. The second shaft section (22) is connected to the second sleeve section (52) of the drill bushing (50). The second shaft section (22) can transmit torque to the second sleeve section (52).

2. The polygonal socket-type spindle drill sleeve connection structure for downhole drill boxes according to claim 1, characterized in that: The drill sleeve (50) is provided with an inner hole that is connected to the drill rod (60) with a hexagonal cross section, and the second sleeve section (52) is provided with an inner hole that is connected to the second shaft section (22) with a polygonal cross section.

3. The polygonal socket-type spindle drill sleeve connection structure for downhole drill boxes according to claim 2, characterized in that: The main shaft (20) is also provided with a third shaft section (23), on which a sealing ring groove (26) is provided, and the sealing ring groove (26) contains a sealing ring (40) for sealing.

4. The polygonal socket-type spindle drill sleeve connection structure for downhole drill boxes according to claim 3, characterized in that: The main shaft (20) is also provided with a first shaft section (21), which is connected to the first sleeve section (51) of the drill sleeve (50) to achieve coaxiality between the main shaft (20) and the drill sleeve (50).

5. A polygonal socket-type spindle drill sleeve connection structure for downhole drill boxes according to claim 4, characterized in that: The spindle (20) is also provided with a spindle end face (24) that contacts the end face of the drill rod (60) to constrain the drill rod (60) in the axial direction.

6. A polygonal socket-type spindle drill sleeve connection structure for a downhole drill box according to any one of claims 1-5, characterized in that: The polygons include quadrilaterals, hexagons, and octagons.

7. A polygonal socket-type spindle drill sleeve connection structure for downhole drill boxes according to claim 6, characterized in that: Several pins (30) are provided on the main shaft (20).

8. A polygonal socket-type spindle drill sleeve connection structure for a downhole drill box according to claim 7, characterized in that: The pins (30) are arranged symmetrically.

9. A polygonal socket-type spindle drill sleeve connection structure for a downhole drill box according to claim 8, characterized in that: The spindle (20) is provided with an end face, which contacts the bottom end of the drill sleeve (50) to constrain the drill sleeve (50) in the axial direction.

10. A polygonal socket-type spindle drill sleeve connection structure for a downhole drill box according to claim 9, characterized in that: The pin (30) is a flexible pin.

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