Power head for drilling machine

Abstract

The utility model relates to the technical field of drilling machine equipment, in particular to a power head for a drilling machine, which comprises a spindle, an oil supply channel is arranged on the spindle, and a hydraulic chuck and an oil supply component are mounted on the spindle in a split manner. The oil supply assembly and the hydraulic chuck are installed on the main shaft in a split mode, when an oil distribution sleeve in the oil supply assembly is abraded and needs to be replaced, the oil supply assembly can be directly detached for replacement, and the oil supply assembly and the hydraulic chuck are installed in a split mode. Compared with the prior art that the oil supply assembly and the hydraulic chuck are connected and installed at the same end of the main shaft, when the oil distribution sleeve is replaced, the hydraulic chuck needs to be disassembled firstly, and then other parts related to the main shaft are disassembled, so that the oil distribution sleeve can be disassembled and replaced. Due to the split type design, the oil distribution sleeve can be quickly disassembled and replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling equipment, in particular to a power head for a drilling rig. Background Art

[0002] Coal mining methods include underground mining and open-pit mining, and coal mining drills are the most commonly used drilling construction equipment in these two mining methods.

[0003] The existing power head for coal mine drilling rigs mainly includes a hydraulic chuck, a reduction box and a main shaft (an oil distribution sleeve is installed on the main shaft). When installing, the main shaft is first connected to the reduction box, and the hydraulic chuck and the oil distribution sleeve are installed at the same end of the main shaft and are located in front of the oil distribution sleeve. When the oil distribution sleeve is worn and needs to be replaced, the hydraulic chuck and other components associated with the main shaft need to be disassembled in turn before the oil distribution sleeve can be removed from the main shaft for replacement. This requires the collaboration of multiple people, and the workload is large. Secondly, an oil inlet pipe with a diameter smaller than the oil distribution hole is installed in the oil distribution hole on the traditional oil distribution sleeve, and a sealing ring is provided between the oil inlet pipe and the oil distribution hole for sealing. However, the sealing ring plays a sealing and supporting role during use. The sealing ring is easily squeezed and deformed under the action of hydraulic oil, and oil leakage is likely to occur. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model aims to provide a power head for a drilling rig, wherein the oil supply assembly and the hydraulic chuck of the power head are installed in a split manner, and the oil sleeve can be directly disassembled and replaced by only disassembling the oil supply assembly.

[0005] The technical solution adopted by the utility model is as follows: a power head for a drilling rig, including a main shaft, on which an oil supply channel is provided, on which a hydraulic chuck and an oil supply assembly are installed in a split manner, and the oil supply assembly can continuously provide hydraulic oil for the hydraulic chuck to clamp the drilling tool through the oil supply channel.

[0006] Compared with the prior art, the beneficial effects of the present invention are:

[0007] The oil supply assembly and the hydraulic chuck of the utility model are installed on the main shaft in a split manner. When the oil sleeve in the oil supply assembly is worn and needs to be replaced, the oil supply assembly can be directly disassembled for replacement. In addition, the oil supply assembly and the hydraulic chuck are installed in a split manner, which is conducive to the separate maintenance of other parts of the oil supply assembly or the hydraulic chuck. Compared with the prior art in which the oil supply assembly and the hydraulic chuck are connected and installed at the same end on the main shaft, when replacing the oil sleeve, it is necessary to first disassemble the hydraulic chuck and then disassemble other parts associated with the main shaft before disassembling and replacing the oil sleeve. The split design of the utility model can realize the rapid disassembly and replacement of the oil sleeve, and the replacement operation can be performed by a single person, reducing the manpower input and workload.

[0008] As a preferred embodiment of the present utility model, the hydraulic chuck and the oil supply assembly are respectively installed on both sides of the reduction gear box.

[0009] As a preferred embodiment of the utility model, the oil supply assembly includes an oil distribution sleeve body and a main shaft end cover which are sleeved on the outer circumferential surface of the main shaft. The main shaft end cover is fixedly connected to the reduction gear box body for supporting the main shaft, and the main shaft end cover is covered on the outside of the oil distribution sleeve body for protecting the oil distribution sleeve body.

[0010] As a preferred embodiment of the utility model, the main shaft end cover includes a front end cover, a connecting cylinder and a rear end cover connected in sequence, the front end cover is connected to the reduction gear box body, the connecting cylinder cover is arranged on the outside of the oil distribution sleeve body, and the oil distribution sleeve body can be directly removed after the connecting cylinder is removed.

[0011] In this solution, when the oil distribution sleeve is worn and needs to be replaced, it is only necessary to remove the bolts between the connecting tube and the front end cover to remove the connecting tube and expose the oil distribution sleeve. At this time, the oil distribution sleeve can be directly and quickly removed and replaced.

[0012] As a preferred embodiment of the utility model, oil distribution holes are respectively opened on the outer circumferential surfaces of the connecting cylinder and the oil distribution sleeve along the radial direction of the main shaft, and the oil supply assembly includes an oil inlet pipe installed in the two oil distribution holes, one end of the oil inlet pipe is located on the outside of the connecting cylinder, and the other end passes through the main shaft end cover and is embedded in the oil distribution hole of the oil distribution sleeve. When the main shaft rotates so that the oil inlet hole of the oil supply channel is aligned with the oil inlet pipe mouth, the hydraulic oil enters the oil supply channel and is finally delivered to the hydraulic chuck.

[0013] In this solution, when the oil inlet pipe extends from the connecting cylinder into the oil distribution sleeve, the axial direction of the oil distribution sleeve can be positioned to improve the stability of the oil distribution sleeve installed in the main shaft end cover, and the hydraulic oil can be introduced into the oil distribution hole on the oil distribution sleeve through the oil inlet pipe. When the main shaft rotates so that the oil inlet hole of the oil supply channel is aligned with the oil distribution hole on the oil distribution sleeve, the hydraulic oil enters the oil supply channel and is finally delivered to the hydraulic chuck.

[0014] As a preferred embodiment of the utility model, the outer circumferential surface of one end of the oil inlet pipe embedded in the oil distribution sleeve body is provided with an annular groove in the circumferential direction, and a sealing ring is sleeved in the annular groove.

[0015] In this solution, the utility model installs an "O"-shaped sealing ring in the annular groove. At this time, the sealing ring only plays a sealing role, and the oil inlet pipe plays a supporting role. Compared with the prior art in which a sealing ring is directly arranged between the oil inlet pipe and the oil distribution hole, the sealing ring plays both sealing and supporting roles during use. The sealing ring is easily squeezed and deformed under the action of hydraulic oil, thereby easily causing oil leakage. The sealing ring arrangement method of the utility model has a better sealing effect.

[0016] As a preferred embodiment of the present invention, a groove is provided on the inner wall of the connecting cylinder, a bearing is installed in the groove, and an inner ring of the bearing is connected to the main shaft.

[0017] In this solution, when the main shaft and the main shaft end cover rotate relative to each other, the bearing is used to bear the radial load of the main shaft to increase the service life of the main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a schematic diagram of the overall structure of a power head for a drilling rig.

[0019] Figure 2 The utility model is a schematic diagram of the connection between the main shaft and the hydraulic chuck of the power head for the drilling rig.

[0020] Figure 3 The utility model is a schematic diagram of the connection between an oil inlet pipe and a sealing ring of a power head for a drilling rig.

[0021] Figure 4 The utility model is a schematic structural diagram of a main shaft of a power head for a drilling rig.

[0022] The reference numerals include: 1-reduction gearbox, 2-spindle, 21-oil supply channel, 3-hydraulic chuck, 4-oil supply assembly, 41-oil distribution sleeve, 42-spindle end cover, 421-front end cover, 422-connecting cylinder, 423-rear end cover, 43-oil distribution hole, 44-oil inlet pipe, 45-annular groove, 46-sealing ring, 47-groove, 48-bearing. DETAILED DESCRIPTION

[0023] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.

[0024] In the description of the present application, the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the structure referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0025] See also Figures 1 to 4 As shown, the present application discloses a power head for a drilling rig, including a main shaft 2, which is transmission-connected to a reduction gear box 1, and a hydraulic chuck 3 and an oil supply assembly 4 are installed on the main shaft 2 in a split manner, and the hydraulic chuck 3 and the oil supply assembly 4 are respectively installed on both sides of the reduction gear box 1, and the oil supply assembly 4 can continuously provide hydraulic oil to the hydraulic chuck 3 for clamping the drilling tool through the oil supply channel 21. Specifically, the structure and working principle of the hydraulic chuck 3 are prior art, and will not be elaborated on here. The oil supply assembly 4 and the hydraulic chuck 3 of the utility model are installed on the main shaft 2 in a split manner, and are respectively placed on both sides of the reduction box body 1. When the oil sleeve in the oil supply assembly 4 is worn and needs to be replaced, the oil supply assembly 4 can be directly disassembled and replaced on one side of the reduction box body 1. In addition, the oil supply assembly 4 and the hydraulic chuck 3 are installed in a split manner, which is conducive to the separate maintenance of other components of the oil supply assembly 4 or the hydraulic chuck 3. Compared with the prior art in which the oil supply assembly 4 and the hydraulic chuck 3 are connected and installed on the same end of the main shaft 2, when replacing the oil sleeve, the hydraulic chuck 3 needs to be disassembled first, and then other components associated with the main shaft 2 are disassembled before the oil sleeve can be disassembled and replaced. The split design of the utility model can realize the rapid disassembly and replacement of the oil sleeve, and the replacement operation can be performed by a single person, reducing manpower investment and workload.

[0026] See also Figures 1 to 3As shown, the oil supply assembly 4 includes an oil distribution sleeve 41 and a main shaft end cover 42 which are sleeved on the outer circumferential surface of the main shaft 2. The main shaft end cover 42 is fixedly connected to the reduction box body 1 for supporting the main shaft 2, and the main shaft end cover 42 is covered on the outside of the oil distribution sleeve 41 for protecting the oil distribution sleeve 41; the main shaft end cover 42 includes a front end cover 421, a connecting cylinder 422 and a rear end cover 423 which are connected in sequence, the front end cover 421 is connected to the reduction box body 1, and the connecting cylinder 422 is covered on the outside of the oil distribution sleeve 41. When the connecting cylinder 422 is removed, the oil distribution sleeve 41 can be directly removed. Specifically, the main shaft end cover 42 is bolted to the reduction box body 1 and is covered on the outside of the oil distribution sleeve 41, so that the main shaft end cover 42 can install and protect the oil distribution sleeve 41 while supporting and assisting the rotation of the main shaft 2. When the oil distribution sleeve 41 is worn and needs to be replaced, it is only necessary to remove the bolts between the connecting cylinder 422 and the front end cover 421 to remove the connecting cylinder 422 and expose the oil distribution sleeve 41. At this time, the oil distribution sleeve 41 can be directly and quickly disassembled and replaced.

[0027] See also Figure 3 As shown, a groove 47 is provided on the inner wall of the connecting cylinder 422, a bearing 48 is installed in the groove 47, and the inner ring of the bearing 48 is connected to the main shaft 2. Specifically, when the main shaft 2 and the main shaft end cover 42 rotate relative to each other, the bearing 48 is used to bear the radial load of the main shaft 2 to improve the service life of the main shaft 2.

[0028] See also Figure 2 and Figure 3As shown, along the radial direction of the main shaft 2, oil distribution holes 43 are respectively opened on the outer circumferential surfaces of the connecting cylinder 422 and the oil distribution sleeve 41, and the oil supply assembly 4 includes an oil inlet pipe 44 that is penetrated and installed in the two oil distribution holes 43, one end of the oil inlet pipe 44 is located on the outside of the connecting cylinder 422, and the other end passes through the main shaft end cover 42 and is embedded in the oil distribution hole 43 of the oil distribution sleeve 41. When the main shaft 2 rotates so that the oil inlet hole of the oil supply channel 21 is aligned with the oil distribution hole 43 on the oil distribution sleeve 41, the hydraulic oil enters the oil supply channel 21 and is finally delivered to the hydraulic chuck 3; an annular groove 45 is circumferentially opened on the outer circumferential surface of one end of the oil inlet pipe 44 embedded in the oil distribution sleeve 41, and a sealing ring 46 is sleeved in the annular groove 45. Specifically, when the oil inlet pipe 44 extends from the connecting tube 422 into the oil distribution sleeve 41, the axial direction of the oil distribution sleeve 41 can be positioned to improve the stability of the oil distribution sleeve 41 installed in the spindle end cover 42, and the hydraulic oil can be introduced into the oil distribution hole 43 on the oil distribution sleeve 41 through the oil inlet pipe 44. When the spindle 2 rotates so that the oil inlet hole of the oil supply channel 21 is aligned with the oil distribution hole 43 on the oil distribution sleeve 41, the hydraulic oil enters the oil supply channel 21 and is finally delivered to the hydraulic chuck 3. The annular groove 45 is provided at the lower end of the oil inlet pipe 44, and an "O"-shaped sealing ring 46 is installed in the annular groove 45. At this time, the sealing ring 46 only plays a sealing role, and the oil inlet pipe 44 plays a supporting role. Compared with the prior art in which the sealing ring 46 is directly arranged between the oil inlet pipe 44 and the oil distribution hole 43, the sealing ring 46 plays both sealing and supporting roles during use. The sealing ring 46 is easily squeezed and deformed under the action of hydraulic oil, which is prone to oil leakage. The sealing effect of the sealing ring 46 arrangement method of the utility model is better. The oil distribution sleeve 41 and the connecting cylinder 422 are provided with an oil return pipe in the same way as the oil inlet pipe 44, which is used to recover the used hydraulic oil to avoid waste and loss. At the same time, it can also play an overflow role to adjust and balance the flow in the hydraulic system.

[0029] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A power head for a drilling rig, comprising a main shaft, wherein the main shaft is provided with an oil supply channel, characterized in that: The main shaft is provided with a hydraulic chuck and an oil supply assembly in a split manner, and the oil supply assembly can continuously supply hydraulic oil to the hydraulic chuck to clamp the drilling tool through the oil supply channel; The oil supply assembly includes an oil distribution sleeve body and a main shaft end cover sleeved on the outer circumferential surface of the main shaft, the main shaft end cover is fixedly connected to the reduction box body and is used to support the main shaft, and the main shaft end cover is covered on the outside of the oil distribution sleeve body and is used to protect the oil distribution sleeve body; The main shaft end cover comprises a front end cover, a connecting tube and a rear end cover which are connected in sequence, the front end cover is connected to the reduction box body, the connecting tube cover is arranged on the outside of the oil distribution sleeve body, and the oil distribution sleeve body can be directly disassembled after the connecting tube is disassembled; Oil distribution holes are respectively opened on the outer circumferential surfaces of the connecting cylinder and the oil distribution sleeve along the radial direction of the main shaft, and the oil supply assembly includes an oil inlet pipe installed in the two oil distribution holes, one end of the oil inlet pipe is located on the outside of the connecting cylinder, and the other end passes through the main shaft end cover and is embedded in the oil distribution hole of the oil distribution sleeve. When the main shaft rotates so that the oil inlet hole of the oil supply channel is aligned with the oil distribution hole on the oil distribution sleeve, the hydraulic oil enters the oil supply channel and is finally delivered to the hydraulic chuck.

2. The power head for drilling rig according to claim 1, characterized in that: The hydraulic chuck and the oil supply assembly are respectively installed on both sides of the reduction box body.

3. The power head for drilling rig according to claim 1, characterized in that: The outer circumferential surface of one end of the oil inlet pipe embedded in the oil distribution sleeve body is provided with an annular groove in the circumferential direction, and a sealing ring is sleeved in the annular groove.

4. The power head for drilling rig according to claim 1, characterized in that: A groove is provided on the inner wall of the connecting cylinder, a bearing is installed in the groove, and the inner ring of the bearing is connected to the main shaft.

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