An end face key replaceable drill sleeve structure for a mine-used drilling and bolting machine drill box

Abstract

An end surface key replaceable drill sleeve structure for a mine drilling and anchoring machine drill box belongs to the technical field of mine machinery, comprising a drill box shell 10, a main shaft 20 is installed in the hole of the drill box shell 10, the main shaft 20 is detachably connected with a drill sleeve 50 through a detachable fixing connector 70, the drill sleeve 50 can transmit torque to a drill rod 60, and the main shaft 20 can transmit torque to the drill sleeve 50 through a key 30 and / or a pin. The utility model solves the problems of thread loosening, high overall replacement cost and the like in the traditional structure.

Description

Technical Field

[0001] This utility model relates to the field of mining machinery technology, and in particular to a replaceable drill sleeve structure for the end face key of a mining tunneling and anchoring machine drill box. 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 replaceable drill sleeve structure with an end face key for the drill box of a mining roadheader, which takes into account both reliability and ease of maintenance under high-frequency operation. Utility Model Content

[0005] In order to overcome the above-mentioned technical defects, this utility model provides a replaceable drill sleeve structure with an end face key for a drilling box of a mining tunneling and anchoring machine, 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 replaceable drill sleeve structure with an end face key for a drilling box of a mining roadheader includes a drilling box housing 10, a spindle 20 installed in a hole in the drilling box housing 10, the spindle 20 being connected to a drill sleeve 50 via a detachable fixing connector 70, the drill sleeve 50 being able to transmit torque to the drill rod 60, and the spindle 20 being able to transmit torque to the drill sleeve 50 via a key 30 and / or a pin.

[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 polygonal cross-section includes hexagons.

[0008] Furthermore, the spindle 20 is also provided with a second spindle end face 24, and the drill sleeve 50 is provided with a second drill sleeve end face 54. The space between the second spindle end face 24 and the second drill sleeve end face 54 accommodates a sealing ring 40 for sealing.

[0009] Furthermore, the main spindle 20 is also provided with a second spindle section 23, which is connected to the second drill bushing section 53 of the drill bushing 50 to achieve coaxiality between the main spindle 20 and the drill bushing 50.

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

[0011] Furthermore, the key 30 includes a flat key and a semi-circular key. Furthermore, the detachable fixing connector 70 includes a fastening screw and a bolt-nut assembly.

[0012] Furthermore, the fastening screw and bolt-nut assembly can press the drill bushing 50 onto the spindle 20.

[0013] Furthermore, the spindle 20 is provided with a first end face 21, which is connected to the first end face 51 of the drill sleeve, and is used to constrain the drill sleeve 50 in the axial direction.

[0014] Furthermore, the spindle 20 is provided with a first end face 21, and a keyway is provided on the surface of the first end face 21. The drill sleeve 50 is provided with a first end face 51, and a keyway is provided on the surface of the first end face 51. The keyways of the first end face 21 of the spindle and the first end face 51 of the drill sleeve cooperate to accommodate the key 30. The first end face 21 of the spindle and the first end face 51 of the drill sleeve are connected by the key 30.

[0015] The technical effects and advantages of this utility model are as follows: The present invention provides a replaceable drill sleeve structure with an end face key for a mining tunneling and anchoring machine drill box, which solves the problems of loose threads and high cost of integral replacement in traditional structures. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall design of this utility model.

[0017] Figure 2 This is a schematic diagram of the key connection point of this utility model.

[0018] Among them, 10 is the drill housing; 20 is the spindle; 21 is the first end face of the spindle; 22 is the first shaft section of the spindle; 23 is the second shaft section of the spindle; 24 is the second end face of the spindle; 30 is the key; 40 is the sealing ring; 50 is the drill bushing; 51 is the first end face of the drill bushing; 52 is the first shaft section of the drill bushing; 53 is the second shaft section of the drill bushing; 54 is the second end face of the drill bushing; 60 is the drill rod; and 70 is the detachable fixed connector. Detailed Implementation

[0019] 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.

[0020] Reference Figure 1-2 As shown, this utility model provides a replaceable drill sleeve structure with an end face key for a drilling box of a mining roadheader, including a drilling box housing 10, a main shaft 20 installed in the hole of the drilling box housing 10, the main shaft 20 being connected to the drill sleeve 50 via a key 30 and a detachable fixing connector 70, the main shaft 20 transmitting torque to the drill sleeve 50 via the key 30, the drill sleeve 50 having an inner hole with a hexagonal cross-section, which cooperates with a drill rod 60 with a hexagonal cross-section and can drive the drill rod 60 to rotate.

[0021] The detachable retaining connector 70 includes a fastening screw and bolt-nut assembly that presses the drill bushing 50 onto the spindle 20. A key 30 and / or a pin are provided between the spindle 20 and the drill bushing 50 to transmit torque between them. The key 30 includes a flat key and a semi-circular key.

[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 a first spindle section 22, and the first end face 21 of the spindle is connected to the first spindle section 22. The drill bushing 50 is provided with a first drill bushing section 52, and the first end face 51 of the drill bushing is connected to the first drill bushing section 52. The first spindle section 22 and the first drill bushing section 52 are respectively provided with holes that cooperate with the detachable fixed connector 70 to realize the detachable fixed connection between the first spindle section 22 and the first drill bushing section 52.

[0024] The spindle 20 is provided with a first end face 21, and a keyway is provided on the surface of the first end face 21. The drill sleeve 50 is provided with a first end face 51, and a keyway is provided on the surface of the first end face 51. The keyways of the first end face 21 of the spindle and the first end face 51 of the drill sleeve are engaged, and the first end face 21 of the spindle and the first end face 51 of the drill sleeve are connected by a key 30.

[0025] The spindle 20 is provided with a second spindle section 23, which is transitionally fitted with the second drill bushing section 53 of the drill bushing 50 to achieve coaxiality between the spindle 20 and the drill bushing 50.

[0026] The spindle 20 is provided with a second end face 24, which is connected to the second shaft section 23. The drill bushing 50 is provided with a second end face 54, which is connected to the second shaft section 53. The space between the second end face 24 of the spindle and the second end face 54 of the drill bushing is used to accommodate the sealing ring 40.

[0027] The second end face 24 of the spindle contacts the end face of the drill pipe 60 to counteract the axial force of the drill pipe 60.

[0028] Workflow: First, place the key 30 in the keyway of the first end face 21 of the spindle, and place the sealing ring 40 on the second end face 54 of the drill sleeve. Then, fit the drill sleeve 50 onto the spindle 20 and the drill rod 60. Install the detachable fixing connector 70 to position the spindle 20 and the drill sleeve 50. The spindle 20 transmits torque to the drill sleeve 50 through the key 30, and the drill sleeve 50 transmits torque to the drill rod 60 through the hexagonal inner hole.

[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. An end face key replaceable drill sleeve structure for a drill box of a mine jumbo, characterized by: Includes a drill housing (10), in which a spindle (20) is installed, the spindle (20) is connected to a drill bushing (50) via a detachable fixing connector (70), the drill bushing (50) is able to transmit torque to the drill rod (60), and the spindle (20) is able to transmit torque to the drill bushing (50) via a key (30) and / or a pin.

2. The end face key replaceable drill sleeve structure for a drill box of a mine jumbo according to claim 1, characterized in that: The drill bushing (50) is provided with an inner hole that is connected to the drill rod (60) with a hexagonal cross section.

3. The end face key replaceable drill sleeve structure for a drill box of a mine jumbo according to claim 2, characterized in that: The spindle (20) is also provided with a second end face (24), and the drill sleeve (50) is provided with a second end face (54). The space between the second end face (24) of the spindle and the second end face (54) of the drill sleeve accommodates a sealing ring (40) for sealing.

4. The end face key replaceable drill sleeve structure for a drill box of a mine jumbo according to claim 3, characterized in that: The main spindle (20) is also provided with a second spindle section (23), which is connected to the second spindle section (53) of the drill sleeve (50) to achieve coaxiality between the main spindle (20) and the drill sleeve (50).

5. The end face key replaceable drill bushing structure for a drill box of a mine jumbo according to claim 4, characterized in that: The spindle (20) is also provided with a second 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 face key replaceable drill bushing structure for a drill box of a mine jumbo according to any one of claims 1 to 5, characterized in that: The key (30) includes a flat key and a semi-circular key.

7. The end face key replaceable drill bushing structure for a drill box of a mine jumbo according to claim 6, characterized in that: The detachable fastener (70) includes a fastening screw and bolt and nut assembly.

8. The end face key replaceable drill bushing structure for a drill box of a mine jumbo according to claim 7, characterized in that: The fastening screw and bolt-nut assembly can press the drill bushing (50) onto the spindle (20).

9. The end face key replaceable drill bushing structure for a drill box of a mine jumbo according to claim 8, characterized in that: The spindle (20) is provided with a first end face (21), which is connected to the first end face (51) of the drill sleeve, and is used to constrain the drill sleeve (50) in the axial direction.

10. The end face key replaceable drill bushing structure for a drill box of a mine jumbo according to claim 9, characterized in that: The spindle (20) is provided with a first end face (21), and a keyway is provided on the surface of the first end face (21). The drill bushing (50) is provided with a first end face (51), and a keyway is provided on the surface of the first end face (51). The keyways of the first end face (21) of the spindle and the first end face (51) of the drill bushing cooperate to accommodate the key (30). The first end face (21) of the spindle and the first end face (51) of the drill bushing are connected by the key (30).

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