CN215979177U

CN215979177U - Power head for light tunnel drilling machine

Info

Publication number: CN215979177U
Application number: CN202122159780.2U
Authority: CN
Inventors: 张世文; 陈豪
Original assignee: Wuxi Geological Drilling Equipment Co ltd
Current assignee: Wuxi Geological Drilling Equipment Co ltd
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2022-03-08
Anticipated expiration: 2031-09-08

Abstract

The utility model discloses a power head for a light tunnel drilling machine, which comprises a shell, wherein a main shaft rotating around the axis of the shell, a driving device for driving the main shaft to rotate, a slip seat sleeved outside the main shaft and connected with the main shaft, a bearing shell sleeved outside the slip seat, a translation device for driving the slip seat to move axially along the main shaft, and at least three slips arranged between the slip seat and the main shaft, wherein the inner surface of the slip seat is in an expanding shape facing away from the driving device or a closing-in shape facing the driving device, the slips are distributed on the circumference taking the center of the cross section of the main shaft as the center of a circle, the shell is also provided with a first bearing, and the first bearing is sleeved outside the main shaft. The power head for the light tunnel drilling machine does not need a bearing seat, so that the length and the integral size of equipment are greatly reduced, the structure is more compact and light, the transportation and the construction in a shallow hole are convenient, and the use cost of a user is reduced.

Description

Power head for light tunnel drilling machine

Technical Field

The utility model relates to the technical field of drilling, in particular to a power head for a light tunnel drilling machine.

Background

At present, the power head for the tunnel drilling machine in the prior art mainly comprises two functional components, namely a speed reduction component for driving a main shaft to rotate and a chuck component for clamping or loosening a drill rod through driving a slip to move, wherein a first bearing seat and a first bearing which are matched are usually arranged between the speed reduction component and the chuck component, so that the rotating stability of the main shaft is ensured, and the vibration generated when the main shaft rotates is reduced.

However, the power head for the underground drill rig is large in size, is only suitable for construction in deep holes (more than 600 meters), but cannot be constructed in shallow holes (within 200 meters), and is heavy in equipment due to the large size, so that the use cost (including transportation, power consumption and the like) of a user is increased.

Therefore, there is a need for an improved prior art power head for an underground boring machine.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provides the power head for the light tunnel drilling machine, which has the advantages of compact structure, light size and low use cost and is suitable for shallow hole construction.

In order to realize the technical effects, the technical scheme of the utility model is as follows: the utility model provides a light-duty unit head for gallery rig, includes the casing, be provided with main shaft, the drive around self axial lead is rotatory on the casing the rotatory drive arrangement of main shaft, cover are located the main shaft is outer and locate rather than slip seat, cover that is connected the outer bearing shell of slip seat, drive the slip seat is followed main shaft axial displacement's translation device, set up in the slip seat with at least three slips between the main shaft, the internal surface of slip seat is the dorsad drive arrangement's flaring form or orientation drive arrangement's closing up mouth form, the slips distribute in with main shaft cross section center is on the circumference in the centre of a circle, still be provided with first bearing on the casing, first bearing cover is located outside the main shaft.

Through adopting above-mentioned technical scheme, will support the stable rotatory first bearing of main shaft and set up on the casing for whole unit head device has cancelled the bearing frame, and then has reduced the whole length of equipment, has reduced the size of equipment promptly, makes equipment structure more compact and light, and convenient transportation has reduced use cost, and is applicable to the construction in the gallery shallow hole. In the construction process, the driving device is started to drive the main shaft to rotate, the main shaft drives the connecting slips and the slip seat to drive the slips and the slip seat to rotate around the axial lead of the main shaft, and therefore the rotating function is achieved; the slip seat is driven to move along the axial direction of the main shaft through the translation device, and the inner wall of the flaring shape or the closing shape of the slip seat is utilized to drive the slip to move close to the main shaft along the radial direction of the main shaft, so that the drill rod is clamped.

Preferably, the first bearings are provided with at least two bearings distributed along the axial direction of the main shaft.

Through adopting above-mentioned technical scheme, increased the quantity of first bearing, further guaranteed the rotatory stability of main shaft, reduced the vibration when the main shaft is rotatory.

Preferably, the two first bearings are tapered roller bearings arranged in pairs.

By adopting the technical scheme, when the tapered roller bearing bears the radial load generated when the main shaft rotates, an axial component force is generated, and the two axial component forces are mutually offset through the two paired tapered roller bearings, so that the rotating stability of the main shaft is ensured, and the vibration generated in the rotating process of the main shaft is further reduced.

Preferably, the housing is located immediately adjacent to the slip bowl.

By adopting the technical scheme, the size of the equipment is further reduced, so that the weight of the equipment is favorably reduced, the equipment structure is more compact, the equipment is suitable for shallow hole construction, and the use cost of a user is reduced.

Preferably, a second bearing is arranged between the bearing shell and the slip seat, and the second bearing is sleeved outside the slip seat and is rotatably connected with the slip seat.

By adopting the technical scheme, the vibration of the slip seat during rotation is reduced by the second bearing, and the stability of the slip seat during rotation is ensured.

Preferably, a sealing ring which is sleeved outside the slip seat in a sealing manner is arranged between the bearing shell and the slip seat; the sealing rings are arranged at two ends of the slip seat respectively.

Through adopting above-mentioned technical scheme, prevent that the lubricating oil between bearing shell and the slip seat from revealing, lubricate the bearing through lubricating oil, reduce its wearing and tearing that receive, increase of service life.

Preferably, the sealing ring is a felt ring.

Through adopting above-mentioned technical scheme, utilize the felt circle to prevent that the slip bowl from producing the dent owing to relative friction at rotatory in-process, so, guaranteed the sealed effect of lubricating oil to delayed the programming rate of slip bowl, made equipment long-term operation back, the slip bowl maintains near stable and suitable 40 ℃ of temperature, thereby reduced the heat altered shape of slip bowl, prolonged its life by a wide margin when guaranteeing sealed effect.

Preferably, the housing is provided with a wear-resistant ring which is sleeved outside the main shaft in a sealing manner.

By adopting the technical scheme, the wear-resistant ring is arranged between the shell and the wear-resistant ring, so that the main shaft is prevented from being worn; when the wear-resistant ring is damaged, only the wear-resistant ring needs to be replaced without replacing parts with large shapes such as a main shaft, so that the replacement cost is greatly reduced, the wear-resistant ring is convenient to replace, the workload of workers is reduced, and the work efficiency is improved.

Preferably, the wear-resisting rings are arranged in two numbers and are respectively arranged on two sides of the shell.

Through adopting above-mentioned technical scheme, increased the quantity of wear-resisting ring, guaranteed that the both sides of casing avoid with the main shaft contact, further prevent to produce wearing and tearing between main shaft and the casing.

Preferably, the translation device comprises an oil cylinder, a cylinder barrel of the oil cylinder is connected with the shell, and a piston rod of the oil cylinder is connected with the slip seat.

Through adopting above-mentioned technical scheme, utilize the hydraulic pressure oil mass that changes in the hydro-cylinder, the drive piston rod removes, and the piston rod drives the bearing housing and removes, and the bearing housing passes through the bearing and transmits the displacement for the slip seat.

In conclusion, compared with the prior art, the light underground drill power head does not need a bearing seat, so that the length and the integral size of equipment are greatly reduced, the structure is more compact and light, the transportation and the construction in a shallow hole are convenient, and the use cost of a user is reduced.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

in the figure: 1. the novel bearing comprises a shell, 2, a main shaft, 3, a driving device, 3a, a hydraulic motor, 3b, a driving gear, 3c, a driven gear, 4, a slip seat, 5, a bearing shell, 6, a translation device, 7, a slip, 8, a first bearing, 9, a second bearing, 10, a sealing ring and 11, and a wear-resistant ring.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1-2, the power head for a light tunnel boring machine of the present invention includes a housing 1, a main shaft 2 rotating around its axis and a driving device 3 for driving the main shaft 2 to rotate are provided on the housing 1, the driving device 3 includes a hydraulic motor 3a fixed on the housing 1, a driving gear 3b fixed on the output end of the hydraulic motor 3a with the axis and a driven gear 3c fixed outside the main shaft 2 with the axis, the driving gear 3b is engaged with the driven gear 3c, and the hydraulic motor 3a is a variable speed motor.

When the main shaft 2 needs to be driven to rotate, the hydraulic motor 3a is started to drive the driving gear 3b to rotate around the axis line of the driving gear 3b, the driving gear 3b acts on the driven gear 3c meshed with the driving gear 3b, and then the driven gear 3c is driven to rotate, so that the main shaft 2 is rotated.

The main shaft 2 is sleeved with a slip seat 4, the main shaft 2 is in driving connection with the slip seat 4, three or more slips 7 are arranged between the slip seat 4 and the main shaft 2, the slips 7 are uniformly distributed on a circumference which takes the center of the cross section of the main shaft 2 as the center of a circle, and the inner surface of the slip seat 4 is in a flaring shape back to the driving device 3; the slip seat 4 is connected with a translation device 6 for driving the slip seat to move axially along the main shaft 2, the translation device 6 comprises an oil cylinder, a cylinder barrel of the oil cylinder is connected with the shell 1, a piston rod of the oil cylinder is connected with the bearing shell 5, and the bearing shell 5 is connected with the slip seat 4 through a bearing 9. It should be noted that the number of the slips 7 can be ensured to be three or more, namely, the drill rod can be clamped; in addition, the oil cylinder can also be connected with the slip seat 4 in other modes so as to realize the displacement of the slip seat 4 along the circumferential direction of the main shaft 2.

When the main shaft 2 is rotatory, it is rotatory to drive slips 7 and slip bowl 4 around the axial lead of main shaft 2 in step, realize the rotation function, the hydro-cylinder operation as translation device 6 this moment, increase the oil mass in its cylinder, thereby the drive piston rod removes, drive bearing shell 5 and remove, bearing shell 5 transmits the displacement for slip bowl 4, make slip bowl 4 keep away from casing 1 along the 2 axial of main shaft and remove, because the internal surface of slip bowl 4 is the flaring form back to drive arrangement 3, and then drive slips 7 and remove along the radial main shaft 2 that is close to of main shaft 2, finally press from both sides tight drilling rod. The inner surface of the slip bowl 4 may be tapered toward the driving device 3, and the above-described technical effects can be similarly achieved.

As shown in fig. 3, the housing 1 is provided with two first bearings 8 sleeved outside the main shaft 2, and the two first bearings 8 are tapered roller bearings which are arranged in pairs and are respectively arranged at two sides of the driven gear 3 c; the housing 1 is arranged in close proximity to the slip bowl 4.

In this unit head for tunnel drilling machine, because two first bearings 8 set up on casing 1 for support main shaft 2 and carry out steady rotation, vibration when reducing main shaft 2 and rotating, consequently need not additionally to install the bearing frame in order to install first bearing 8. The casing 1 and the slip seat 4 which are arranged closely further reduce the overall length and weight of the device, so that compared with the conventional power head for the underground drill rig, the power head is more compact in structure, small and portable, is suitable for construction of shallow holes (within 200 meters), and reduces the use cost of users. The two first bearings 8 are tapered roller bearings which are arranged in pairs and are respectively arranged on two sides of the driven gear 3c, and by adopting the structural mode, in the rotating process of the main shaft 2, the two tapered roller bearings generate two axial component forces in opposite directions while bearing radial loads, so that the stable rotation of the main shaft 2 is further ensured.

A second bearing 9 is arranged between the bearing shell 5 and the slip seat 4, the second bearing 9 is sleeved outside the slip seat 4 and is rotatably connected with the slip seat 4, and the number of the second bearings 9 is two, namely a tapered roller bearing and a deep groove ball bearing; sealing rings 10 are further arranged at two ends of the slip seat 4, and the sealing rings 10 are wool felt rings which are hermetically sleeved outside the main shaft 2.

By adopting the structure, the slip seat 4 is supported by the two second bearings 9 to rotate stably, and the sealing rings 10 at the two ends of the slip seat 4 are used for sealing to prevent lubricating oil from leaking; the sealing ring 10 is a wool felt ring, so that the dent abrasion generated on the surface of the slip seat 4 after the equipment runs for a long time can be prevented, the sealing effect is ensured, the lubricating oil for lubricating the bearing is prevented from leaking, and the service life of the second bearing 9 is further ensured; after the traditional rubber sealing element is sealed, after the equipment runs for a long time, the high temperature of 70-80 ℃ is easily reached, so that the heat deformation of the slip seat 4 is caused, the service life of the slip seat 4 is shortened, and the sealing performance is influenced; it should be noted that the sealing ring 10 may be other types of felt rings, which can achieve the above technical effects.

The casing 1 is provided with two wear-resistant rings 11 sleeved outside the main shaft 2, and the two wear-resistant rings 11 are respectively arranged on two sides of the casing 1.

The main shaft 2 is prevented from directly contacting the shell 1 by the wear-resistant ring 11, so that the main shaft 2 is prevented from being worn, and the service life of the main shaft is prolonged; along with the increase of service time, wear-resisting ring 11 can be changed after wearing and tearing, and need not to change large-scale spare parts such as main shaft 2, and on the one hand change convenient operation has alleviateed workman's work load, has improved work efficiency, and on the other hand has reduced the replacement cost to user's use cost has been reduced.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A power head for a light tunnel drilling machine comprises a shell (1), wherein a main shaft (2) rotating around the axis of the shell (1), a driving device (3) driving the main shaft (2) to rotate, a slip seat (4) sleeved outside the main shaft (2) and connected with the main shaft, a bearing shell (5) sleeved outside the slip seat (4), a translation device (6) driving the slip seat (4) to move axially along the main shaft (2), and at least three slips (7) arranged between the slip seat (4) and the main shaft (2) are arranged on the shell (1), the inner surface of the slip bowl (4) is in a flaring shape facing away from the driving device (3) or in a closing shape facing towards the driving device (3), slips (7) distribute in with main shaft (2) cross section center is on the circumference of centre of a circle, its characterized in that:

the shell (1) is further provided with a first bearing (8), and the first bearing (8) is sleeved outside the main shaft (2).

2. The power head for a light tunnel boring machine according to claim 1, characterized in that: the number of the first bearings (8) is at least two, and the first bearings are distributed along the axial direction of the main shaft (2).

3. The power head for a light tunnel boring machine according to claim 2, characterized in that: the two first bearings (8) are tapered roller bearings arranged in pairs.

4. The power head for a light tunnel boring machine according to claim 1, characterized in that: the shell (1) and the slip seat (4) are arranged in close proximity.

5. The power head for a light tunnel boring machine according to claim 1, characterized in that: bearing housing (5) with be provided with second bearing (9) between slip seat (4), second bearing (9) cover is located outside slip seat (4) and with slip seat (4) rotate and are connected.

6. The power head for a light tunnel boring machine according to claim 1, characterized in that: a sealing ring (10) which is sleeved outside the slip seat (4) in a sealing manner is arranged between the bearing shell (5) and the slip seat (4); the two sealing rings (10) are respectively arranged at two ends of the slip seat (4).

7. The power head for a light tunnel boring machine according to claim 6, characterized in that: the sealing ring (10) is a felt ring.

8. The power head for a light tunnel boring machine according to claim 1, characterized in that: and a wear-resistant ring (11) which is hermetically sleeved outside the main shaft (2) is arranged on the shell (1).

9. The power head for a light tunnel boring machine according to claim 8, characterized in that: the wear-resistant rings (11) are arranged in two numbers and are respectively arranged on two sides of the shell (1).

10. The power head for a light tunnel boring machine according to claim 1, characterized in that: the translation device (6) comprises an oil cylinder, a cylinder barrel of the oil cylinder is connected with the shell (1), and a piston rod of the oil cylinder is connected with the slip seat (4).