CN215979178U - Power head for underground drill rig - Google Patents
Power head for underground drill rig Download PDFInfo
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- CN215979178U CN215979178U CN202122160142.2U CN202122160142U CN215979178U CN 215979178 U CN215979178 U CN 215979178U CN 202122160142 U CN202122160142 U CN 202122160142U CN 215979178 U CN215979178 U CN 215979178U
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- slip seat
- power head
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Abstract
The utility model discloses a power head for a tunnel drilling machine, which comprises a shell, wherein a main shaft rotating around the axial lead of the shell, a driving device for driving the main shaft to rotate, a slip seat sleeved outside the main shaft and in transmission connection with the main shaft, at least three slips arranged between the slip seat and the main shaft and a translation device for driving the slip seat to move axially along the main shaft are arranged on the shell, the inner surface of the slip seat 5 is in an expanding shape back to the driving device 3 or a closing-up 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 circle center, a bearing shell is sleeved outside the slip seat, a felt ring is arranged between the bearing shell and the slip seat, and the circumferential inner wall of the felt ring is in sealing connection with the circumferential outer edge of the slip seat. The power head for the tunnel drilling machine delays the heating speed, reduces the heating amount, avoids the abrasion of a pit formed on the slip seat, ensures the long-term good sealing performance of equipment and prolongs the service life of the slip seat while sealing the circumferential outer edge of the slip outer seat by utilizing the felt ring.
Description
Technical Field
The utility model relates to the technical field of power heads, in particular to a power head for a tunnel drilling machine.
Background
At present, a power head of a full hydraulic drill mainly comprises two functional components: the hydraulic oil enters the chuck component through the oil inlet connector, the oil distribution sleeve and the spindle to drive the chuck to open and close, so that the drill rod is clamped and loosened.
In the prior art, a framework oil seal is usually adopted to seal a bearing part of a power head, but in the operation process of the power head, more heat is generated due to friction, the temperature is increased too fast, the sealing surface of a slip seat is easy to wear, the service life is shortened, and the sealing effect is influenced; moreover, in the operation process of the equipment, gaps around the bearing are inconsistent due to abrasion, so that the stable rotation of the main shaft is influenced; in addition, the weight difference exists between the speed reduction part and the chuck part at two ends of the existing power head, the rotating stability of the bearing is influenced, and the main shaft vibrates greatly when rotating.
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 provide the power head for the underground drill rig, which improves the sealing performance, prolongs the service life of a slip seat and ensures the stable rotation of a main shaft and a bearing.
In order to realize the technical effects, the technical scheme of the utility model is as follows: the utility model provides a unit head for tunnel drilling machine, 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 the slip seat rather than the transmission is connected, set up in the slip seat with at least three slips and drive between the main shaft the slip seat is followed main shaft axial displacement's translation device, the internal surface of slip seat is for facing back drive arrangement's flaring form or orientation drive arrangement's flaring form, the slips distribute in with main shaft cross section center is on the circumference of centre of a circle, slip seat overcoat is equipped with bearing housing, bearing housing with be provided with the felt circle between the slip seat, the circumference inner wall of felt circle with the circumference outer fringe sealing connection of slip seat.
When the power head for the underground drill rig in the technical scheme is used, the driving device is started to drive the main shaft to rotate, the main shaft drives the slips and the slip seat to rotate, so that a rotating function is achieved, then the slip seat is driven by the translation device to move along the axial direction of the main shaft, and the slips are pushed to move close to the main shaft along the radial direction of the main shaft by utilizing the inner surface of the flaring shape or the closing shape of the main shaft, so that a drill rod is clamped. In the chuck part of this unit head, utilize the felt circle to seal the circumference outer fringe of slip seat, compare in traditional skeleton oil blanket, the heat of production is few, has delayed the programming rate, protects the friction surface of slip seat, reduces its wearing and tearing to the life of extension slip seat, and guarantee sealed effect.
Preferably, the two felt rings are respectively arranged at two ends of the slip seat.
By adopting the technical scheme, the usage amount of the felt ring is saved while the sealing effect is ensured, and the sealing cost is reduced.
Preferably, the material of the felt loop is wool.
By adopting the technical scheme, the heating speed of the bearing seat and the felt ring is further delayed, the slip seat is protected, the surface temperature of the slip seat is stably maintained near 40 ℃ after the power head runs for a long time, and the service life of the slip seat is prolonged.
Preferably, the spindle is sleeved with a bearing seat, and two ends of the bearing seat are provided with bearings connected with the spindle.
By adopting the technical scheme, the vibration of the main shaft when the power head operates is reduced, and the stable operation of the equipment is ensured.
Preferably, the bearings at the two ends of the bearing seat are respectively a tapered roller bearing and a deep groove ball bearing.
By adopting the technical scheme, the translation device is utilized to drive the whole chuck to perform axial displacement, then the slip seat is used for decomposing the axial force into the radial component force and the axial component force, the radial component force clamps the main shaft through the slips, the axial component force is transmitted to the main shaft through the slips, and the main shaft is transmitted to the tapered roller bearing, so that the pre-tightening force is provided for the bearing.
Preferably, the tapered roller bearing is arranged at one end of the bearing seat adjacent to the driving device.
Through adopting above-mentioned technical scheme, conveniently change tapered roller bearing.
Preferably, the bearing seat is arranged at the central position of the slip seat and the driving device along the length direction of the main shaft.
By adopting the technical scheme, the weight ratio of two sides of the bearing seat is close to 5:5, so that the rotating stability of the bearing is improved.
Preferably, the driving device comprises a hydraulic motor fixed on the shell, a driving gear arranged at the output end of the hydraulic motor, and two driven gears which are connected with the main shaft by the same axial lead and have different outer diameters, and the driving gear is a duplicate gear meshed with one of the driven gears.
By adopting the technical scheme, the hydraulic motor is started to drive the driving gear to rotate and act on one driven gear, so that the main shaft is driven to rotate; because the driving gear is a duplicate gear, after the driving gear is meshed with another driven gear, the rotating speed of the main shaft can be changed, and therefore adjustment is carried out.
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.
By adopting the technical scheme, the working efficiency of the translation device is ensured, and the stable movement of the slip seat is favorably realized.
Preferably, the slips are arranged in three numbers and are uniformly distributed on a circumference which takes the center of the cross section of the main shaft as a circle center.
By adopting the technical scheme, the number of slips is saved on the basis of ensuring that the drill rod can be clamped, so that the production cost of equipment is reduced.
In conclusion, the power head for the underground drill rig disclosed by the utility model utilizes the felt ring to seal the circumferential outer edge of the outer clamping seat, delays the heating speed, reduces the heating amount, avoids the abrasion of a pit formed on the slip seat, ensures the long-term good sealing property of equipment and prolongs the service life of the slip seat.
Drawings
FIG. 1 is a cross-sectional view of a power head for an underground boring machine of the present invention;
FIG. 2 is a cross-sectional view of a power head translation device for an underground boring machine of the present invention;
in the figure: 1. the device 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 translation device, 5. a slip seat, 6. a slip, 7. a bearing shell, 8. a felt ring, 9. a bearing seat, 10. a tapered roller bearing, 11. a deep groove ball bearing and 12. a rear cover.
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 and 2, the power head for the tunnel boring machine of the present invention comprises a housing 1, wherein the housing 1 is provided with a main shaft 2 rotating around its axis, a driving device 3 driving the main shaft 2 to rotate, a slip seat 5 sleeved outside the main shaft 2 and in transmission connection with the main shaft 2, three slips 6 arranged between the slip seat 5 and the main shaft 2, and a translation device 4 driving the slip seat 5 to move axially along the main shaft 2; wherein, the inner surface of the slip seat 5 is in a flaring shape back to the driving device 3 to form a round table shape and an inner cavity for the main shaft 2 to penetrate through, three slips 6 are uniformly distributed on a circumference taking the center of the cross section of the main shaft 2 as the circle center, and a bearing shell 7 is sleeved outside the slip seat 5; a felt ring 8 is arranged between the bearing shell 7 and the slip seat 5, and the circumferential inner wall of the felt ring 8 is connected with the circumferential outer edge of the slip seat 5 in a sealing manner; two felt rings 8 are arranged and are respectively arranged at two ends of the slip seat 5; the material of felt 8 is wool.
When the power head for the underground drill rig is used, the driving device 3 is started to drive the main shaft 2 to rotate, and the main shaft 2 drives the slips 6 and the slip seat 5 to rotate, so that the rotating function is realized; when a drill rod needs to be clamped, the translation device 4 is started to push the slip seat 5 to move along the length direction of the main shaft 2, so that the part with the smaller inner diameter of the main shaft 2 is close to the slip 6; the slip seat 5 keeps translating and is contacted with the slips 6, and the slips 6 are driven to move close to the main shaft 2 along the radial direction of the main shaft 2; as the three slips 6 are uniformly distributed on the circumference which takes the center of the cross section of the main shaft 2 as the center of a circle, finally the three slips 6 are abutted against the circumferential outer edge of the main shaft 2, thereby clamping the drill rod. The inner surface of the slip bowl 5 may be tapered toward the driving device 3, and the above-described technical effects can be similarly achieved.
Bearing housing 7 is established to slip bowl 5's outside cover, and utilize felt circle 8 between bearing housing 7 and the slip bowl 5 to seal the both ends of slip bowl 5, compare in current skeleton oil blanket, utilize the felt circle to seal, can delay the programming rate of slip bowl 5 when equipment operation by a wide margin, reduce the heating capacity, and felt circle 8 adopts the wool to make, avoid the rotatory in-process of slip bowl 5, because the wearing and tearing that relative friction caused, thereby prevent to form on the friction surface of slip bowl 5 sunken, sealed effect has been guaranteed. Through actual detection, this unit head continuous operation 24 hours after, the temperature of slip bowl 5 is about 40 ℃ (and when adopting the skeleton oil blanket to seal, under the same condition, the temperature of slip bowl 5 is 70 ~ 80 ℃), consequently, has reduced the temperature of slip bowl 5 by a wide margin to its life has been prolonged, and guarantee sealed effect.
The slips 6 are arranged in three numbers and are uniformly distributed on the circumference which takes the center of the cross section of the main shaft 2 as the circle center, so that the number of the slips 6 is reduced on the basis of ensuring that a drill rod can be clamped, and the cost of equipment is reduced.
The bearing seat 9 is sleeved outside the main shaft 2, bearings connected with the main shaft 2 are arranged at two ends of the bearing seat 9, the bearings at two ends of the bearing seat 9 are respectively a tapered roller bearing 10 and a deep groove ball bearing 11, the tapered roller bearing 10 is arranged at one end of the bearing seat 9 adjacent to the driving device 3, and the bearing seat 9 is arranged at the central position of the slip seat 5 and the driving device 3 along the length direction of the main shaft 2.
By adopting the structure mode, the bearing seat 9 is arranged at the central position of the slip seat 5 and the driving device 3 along the length direction of the main shaft 2, so that the weight ratio of two ends of the bearing seat 9 is close to 5:5, the rotation stability of the bearing is improved, and the vibration generated when the equipment runs is reduced; in addition, the traditional mode that the tapered roller bearings are used in a matched mode is abandoned, and the combination mode of the tapered roller bearings and the deep groove ball bearings is adopted, so that the generated abrasion loss is automatically compensated by the translation device 4 in the operation process of the equipment, and the power head is free from maintenance before the bearings are scrapped. The specific working principle is as follows:
the translation device 4 is started to drive the whole chuck to perform axial displacement, and then the axial force is decomposed into a radial component force and an axial component force through the slip seat 5, wherein the radial component force is used for clamping the slip 6, the axial component force is transmitted to the main shaft 2 through the slip 6, and the main shaft 2 is transmitted to the tapered roller bearing 10, so that pre-tightening force is provided for the bearing, an automatic compensation function is realized, the device is free from maintenance, and the phenomenon that the main shaft 2 generates larger vibration due to the generation of a gap caused by abrasion during the operation of equipment is avoided.
The translation device 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 7 through the rear cover 12, and the bearing shell 7 is connected with the slip seat 5 through a bearing. Through the hydraulic oil mass that changes in the hydro-cylinder, the drive piston rod removes, and the piston rod drives bearing housing 7 through back lid 12 and removes, through bearing housing 7 and bearing, transmits the slip seat with the displacement to drive slip seat 5 and carry out axial displacement. It should be noted that the oil cylinder may be connected to the slip bowl 5 in another manner to drive the slip bowl 5 to move in the axial direction of the spindle 2.
The driving device 3 comprises a hydraulic motor 3a fixed on the housing 1, a driving gear 3b arranged at the output end of the hydraulic motor 3a and two driven gears 3c which are coaxially connected with the main shaft 2 and have different outer diameters, wherein the driving gear 3 is a duplicate gear meshed with one of the driven gears 3c.
When the main shaft 2 is driven to rotate, the hydraulic motor 3a is started to drive the driving gear 3b to rotate, so that one driven gear 3c rotates, and the main shaft 2 coaxially connected with the driven gear 3c is driven to rotate. Because the driving gear 3b is a duplicate gear, the driving gear can be switched and meshed with the two driven gears 3c, so that the rotating speed of the main shaft 2 is changed, the speed of the main shaft 2 is regulated, and different use requirements are met.
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 (10)
1. The power head for the tunnel drilling machine comprises a shell (1), wherein a main shaft (2) rotating around the self axial lead, a driving device (3) for driving the main shaft (2) to rotate, a slip seat (5) sleeved outside the main shaft (2) and in transmission connection with the main shaft, at least three slips (6) arranged between the slip seat (5) and the main shaft (2) and a translation device (4) for driving the slip seat (5) to move axially along the main shaft (2) are arranged on the shell (1), the inner surface of the slip bowl (5) is flared back to the drive device (3) or is flared towards the drive device (3), the slips (6) are distributed on a circumference which takes the center of the cross section of the main shaft (2) as the center of a circle, slip seat (5) overcoat is equipped with bearing housing (7), its characterized in that:
a felt ring (8) is arranged between the bearing shell (7) and the slip seat (5), and the circumferential inner wall of the felt ring (8) is connected with the circumferential outer edge of the slip seat (5) in a sealing manner.
2. The power head for an underground drill according to claim 1, wherein: the felt rings (8) are arranged at two ends of the slip seat (5) respectively.
3. The power head for an underground drill according to claim 1, wherein: the felt loop (8) is made of wool.
4. The power head for an underground drill according to claim 1, wherein: the spindle (2) is sleeved with a bearing seat (9), and bearings connected with the spindle (2) are arranged at two ends of the bearing seat (9).
5. The power head for an underground drill rig according to claim 4, wherein: and the bearings at the two ends of the bearing seat (9) are respectively a tapered roller bearing (10) and a deep groove ball bearing (11).
6. The power head for an underground boring machine according to claim 5, wherein: the tapered roller bearing (10) is arranged at one end of the bearing seat (9) adjacent to the driving device (3).
7. The power head for an underground drill rig according to claim 4, wherein: the bearing seat (9) is arranged at the center of the slip seat (5) and the driving device (3) along the length direction of the main shaft (2).
8. The power head for an underground drill according to claim 1, wherein: the driving device (3) comprises a hydraulic motor (3 a) fixed on the shell (1), a driving gear (3 b) arranged at the output end of the hydraulic motor (3 a) and two driven gears (3 c) which are connected with the same axial lead of the main shaft (2) and have different outer diameters, wherein the driving gear (3 b) is a duplicate gear meshed with one driven gear (3 c).
9. The power head for an underground drill rig according to claim 4, wherein: the translation device (4) 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 (5).
10. The power head for an underground drill according to claim 1, wherein: the number of the slips (6) is three, and the slips are uniformly distributed on a circumference which takes the center of the cross section of the main shaft (2) as the circle center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122160142.2U CN215979178U (en) | 2021-09-08 | 2021-09-08 | Power head for underground drill rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122160142.2U CN215979178U (en) | 2021-09-08 | 2021-09-08 | Power head for underground drill rig |
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| Publication Number | Publication Date |
|---|---|
| CN215979178U true CN215979178U (en) | 2022-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122160142.2U Active CN215979178U (en) | 2021-09-08 | 2021-09-08 | Power head for underground drill rig |
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| CN (1) | CN215979178U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685131A (en) * | 2021-09-08 | 2021-11-23 | 无锡锡钻地质装备有限公司 | Power head for underground drill rig |
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2021
- 2021-09-08 CN CN202122160142.2U patent/CN215979178U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685131A (en) * | 2021-09-08 | 2021-11-23 | 无锡锡钻地质装备有限公司 | Power head for underground drill rig |
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