All-hydraulic drilling machine power head

Abstract

The full-hydraulic drilling machine power head comprises a power head box body provided with a lubricating system, a transmission shaft and an intermediate shaft, the power head box body is provided with a main shaft adopting double hydraulic motors for parallel power input, the main shaft is provided with a hydraulic chuck, the transmission shaft is provided with a two-stage speed change duplicate gear, and the intermediate shaft is provided with a two-stage speed change duplicate gear. A fixed gear is installed on the middle shaft, a supporting shaft is further arranged in the power head box body on one side of the transmission shaft, a shifting fork is installed on the supporting shaft, a bearing is installed between the shifting fork and the two-stage speed change duplicate gear, an inserting groove is formed in an outer ring of the bearing, the shifting fork is installed in the inserting groove, and a front sealing mechanism is arranged at the front end of the main shaft. A rear sealing mechanism is arranged at the rear end of the main shaft; the front sealing mechanism and the rear sealing mechanism are arranged on the peripheral faces of the front end and the rear end of the main shaft, the front end and the rear end of the main shaft can be sealed, and the situation that due to oil leakage of the two ends of the main shaft, leaked oil leaks to the hydraulic chuck through single-row roller bearings at the front end and the rear end of the main shaft, and consequently the hydraulic chuck has mechanical faults is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of surface core extraction, in particular to a full hydraulic drilling rig power head. Background Art

[0002] There are many types of structures for the power head of a fully hydraulic drilling rig;

[0003] For example, a fully hydraulic drilling rig power head with patent announcement number CN201176848Y is provided with a main shaft driven by a hydraulic motor, a hydraulic chuck is installed on the upper part of the main shaft, a speed transmission mechanism is provided between the hydraulic motor and the main shaft, the speed transmission mechanism is provided with a transmission shaft and an intermediate shaft, the hydraulic motor is connected to the transmission shaft, the intermediate shaft and the main shaft are transmitted through a pair of constant meshing gears, a two-stage speed-changing double gear is provided on the transmission shaft, a fixed gear for changing speed with the double gear of the transmission shaft is provided on the intermediate shaft, a support shaft is provided on the side of the transmission shaft, a shift fork for cooperating with the double gear on the transmission shaft is provided on the support shaft, a plane bearing is provided between the shift fork and the double gear, a fork groove is provided on the outer bearing ring of the plane bearing, the shift fork is installed in the fork groove of the outer bearing ring, and dual hydraulic motors are used for parallel power input, and the hydraulic chuck is provided with 5 slips.

[0004] The above is a fully hydraulic drilling rig power head involved in our company. After use, it was found that oil leakage is prone to occur in the gap of the main shaft bearing in the power head box. After the oil leakage, the oil will splash into the hydraulic chuck from the gap of the bearing (single-row roller bearing), which is easy to cause mechanical failure. Therefore, we modified the equipment to meet the usage requirements. Utility Model Content

[0005] The technical problem to be solved by the utility model is a full hydraulic drilling rig power head which can prevent the hydraulic chuck from mechanical failure due to oil leakage at the main shaft bearing.

[0006] The technical problem to be solved by the utility model is achieved through the following technical scheme: a fully hydraulic drilling rig power head, comprising a power head housing equipped with a lubrication system, a main shaft with a dual hydraulic motor parallel power input is arranged on the power head housing, a hydraulic chuck with a cava structure is arranged on the main shaft, a transmission shaft connected to the dual hydraulic motor and an intermediate shaft connected to the main shaft are arranged between the dual hydraulic motor and the main shaft, a two-stage speed change double gear is arranged on the transmission shaft, a fixed gear for speed change in coordination with the two-stage speed change double gear is arranged on the intermediate shaft, a support shaft is also arranged in the power head housing on one side of the transmission shaft, a shift fork in coordination with the two-stage speed change double gear is arranged on the support shaft, a bearing is arranged between the shift fork and the two-stage speed change double gear, a slot is arranged on the outer ring of the bearing, the shift fork is arranged in the slot, a front sealing mechanism is arranged in the power head housing near the front end of the main shaft, and a rear sealing mechanism is arranged in the power head housing near the rear end of the main shaft;

[0007] The front sealing mechanism comprises a bearing end cover arranged on the outer peripheral surface of the front end of the main shaft, the outer peripheral surface of the bearing end cover is screwed between the power head housing and the hydraulic chuck, a rotating shaft lip seal ring is installed on the inner peripheral surface of the bearing end cover and the outer peripheral surface of the front end of the main shaft, a lower sealing pad is arranged on the top surface of the bearing end cover, a rubber pad is arranged on the top surface of the lower sealing pad, the sealing pad and the rubber pad are screwed on the top surface of the bearing end cover, and an upper sealing ring is arranged between the inner ring of the rubber pad and the outer ring of the front end of the main shaft;

[0008] The rear sealing mechanism includes a sleeve arranged on the outer circumferential surface of the rear end of the main shaft, an oil separator ring is arranged on the outer circumferential surface of the main shaft at the lower end of the sleeve, a sleeve is arranged on the outer circumferential surface of the oil separator ring at intervals, the gap between the sleeve and the oil separator ring forms a lubrication gap, a lower sealing ring is arranged on the upper ends of the sleeve and the oil separator ring, and a lubrication assembly is arranged on the outer circumferential surface of the sleeve.

[0009] Preferably, the lubrication assembly includes an oil filling pipe, the outlet end of the oil filling pipe is connected to the lubrication gap in the sleeve, a small joint is connected to the inlet end of the oil filling pipe, an oil nozzle joint is connected to the inlet end of the small joint, and a press-fit oil filling cup is embedded in the oil nozzle joint.

[0010] Compared with the prior art, the beneficial technical effect of the utility model is that the front and rear ends of the main shaft can be sealed by setting the front sealing mechanism and the rear sealing mechanism on the outer peripheral surfaces of the front and rear ends of the main shaft, thereby preventing the two ends of the main shaft from leaking oil, and the leaked oil leaking through the single-row roller bearings on the front and rear ends of the main shaft to the hydraulic chuck, thereby causing mechanical failure of the hydraulic chuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0012] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0013] Figure 3 It is a partial enlarged structural schematic diagram of the front sealing mechanism of the utility model;

[0014] Figure 4 It is a partially enlarged structural schematic diagram of the rear sealing mechanism of the utility model.

[0015] In the figure: 1. power head housing; 2. main shaft; 3. transmission shaft; 4. intermediate shaft; 5. two-stage speed change double gear; 6. support shaft; 7. shift fork; 8. bearing; 9. bearing end cover; 10. hydraulic chuck; 11. rotating shaft lip seal; 12. lower sealing gasket; 13. rubber gasket; 14. upper sealing ring; 15. bushing; 16. oil separator ring; 17. lower sealing ring; 18. oil filling pipe; 19. sleeve; 20. small joint; 21. oil nozzle joint; 22. press-fit oil filling cup; 23. lubrication pump. DETAILED DESCRIPTION

[0016] The specific technical solutions of the present invention are further described below with reference to the accompanying drawings, so as to facilitate further understanding of the present invention by those skilled in the art, and do not constitute any limitation to the rights thereof.

[0017] Example 1, reference Figure 1-4 The fully hydraulic drilling rig power head comprises a power head housing 1 equipped with a lubrication system. The lubrication system lubricates the inside of the power head housing 1, and comprises a lubrication pump 23 and an oil pipe. The power head housing 1 is formed into a roughly box structure. A main shaft 2 adopting a parallel power input of a dual hydraulic motor is arranged on the power head housing 1. A hydraulic chuck 10 with a slip structure is arranged on the main shaft 2. A transmission shaft 3 connected to the dual hydraulic motors and an intermediate shaft 4 connected to the main shaft 2 are arranged between the dual hydraulic motors and the main shaft 2. A two-stage variable speed dual The intermediate shaft 4 is provided with a fixed gear for cooperating with the two-stage speed-changing double gear 5 for changing speed. A supporting shaft 6 is also provided in the power head housing 1 on one side of the transmission shaft 3. A shift fork 7 for cooperating with the two-stage speed-changing double gear 5 for transmission is provided on the supporting shaft 6. A bearing 8 is provided between the shift fork 7 and the two-stage speed-changing double gear 5. A slot is provided on the outer ring of the bearing 8. The shift fork 7 is installed in the slot. A front sealing mechanism is provided in the power head housing 1 near the front end of the main shaft 2. A rear sealing mechanism is provided in the power head housing 1 near the rear end of the main shaft 2.

[0018] The front sealing mechanism includes a bearing end cover 9 arranged on the outer peripheral surface of the front end of the main shaft 2, the bearing end cover 9 is formed into a roughly disc-shaped cover body structure, the outer peripheral surface of the bearing end cover 9 is screwed between the power head housing 1 and the hydraulic chuck 10, a rotating shaft lip seal ring 11 is installed on the inner peripheral surface of the bearing end cover 9 and the outer peripheral surface of the front end of the main shaft 2, a lower sealing gasket 12 is arranged on the top surface of the bearing end cover 9, the lower sealing gasket 12 is formed into a roughly annular sheet structure, a rubber pad 13 is arranged on the top surface of the lower sealing gasket 12, the rubber pad 13 is formed into a roughly annular sheet structure, the sealing gasket and the rubber pad 13 are screwed on the top surface of the bearing end cover 9, and an upper sealing ring 14 is arranged between the inner ring of the rubber pad 13 and the outer ring of the front end of the main shaft 2;

[0019] The rear sealing mechanism includes a sleeve 15 arranged on the outer peripheral surface of the rear end of the main shaft 2, an oil separator ring 16 is arranged on the outer peripheral surface of the main shaft 2 at the lower end of the sleeve 15, a sleeve 19 is arranged on the outer peripheral surface of the oil separator ring 16 at intervals, and the gap between the sleeve 19 and the oil separator ring 16 forms a lubrication gap, a lower sealing ring 17 is arranged on the upper ends of the sleeve 19 and the oil separator ring 16, and a lubrication component is arranged on the outer peripheral surface of the sleeve 19;

[0020] The lubrication assembly includes an oil filling pipe 18, which is formed into a roughly circular tubular structure. The outlet end of the oil filling pipe 18 is connected to the lubrication gap in the sleeve 19. A small joint 20 is connected to the inlet end of the oil filling pipe 18. The small joint 20 is formed into a roughly circular tubular structure. An oil nozzle joint 21 is connected to the inlet end of the small joint 20. A press-fit oil filling cup 22 is embedded in the oil nozzle joint 21.

[0021] The single-row roller bearings at the front and rear ends of the main shaft 2 can be blocked by the front sealing mechanism and the rear sealing mechanism to prevent oil leakage at the front end of the main shaft 2. The oil enters the hydraulic chuck 10 through the single-row roller bearings at the front and rear ends of the main shaft 2, thereby causing a mechanical failure of the hydraulic chuck 10. Compared with the existing full-hydraulic drilling rig power head, the failure rate is lower.

Claims

1. A fully hydraulic drilling rig power head, comprising a power head housing equipped with a lubrication system, a main shaft with a dual hydraulic motor parallel power input is arranged on the power head housing, a hydraulic chuck with a slip structure is arranged on the main shaft, a transmission shaft connected to the dual hydraulic motors and an intermediate shaft connected to the main shaft are arranged between the dual hydraulic motors and the main shaft, a two-stage speed-changing double gear is arranged on the transmission shaft, a fixed gear for changing speed in coordination with the two-stage speed-changing double gear is arranged on the intermediate shaft, a supporting shaft is also arranged in the power head housing on one side of the transmission shaft, a shift fork matched with the two-stage speed-changing double gear is arranged on the supporting shaft, a bearing is arranged between the shift fork and the two-stage speed-changing double gear, a slot is arranged on the outer ring of the bearing, and the shift fork is arranged in the slot, and the characteristics are: A front sealing mechanism is arranged in the power head housing near the front end of the main shaft, and a rear sealing mechanism is arranged in the power head housing near the rear end of the main shaft; The front sealing mechanism comprises a bearing end cover arranged on the outer peripheral surface of the front end of the main shaft, the outer peripheral surface of the bearing end cover is screwed between the power head housing and the hydraulic chuck, a rotating shaft lip seal ring is installed on the inner peripheral surface of the bearing end cover and the outer peripheral surface of the front end of the main shaft, a lower sealing pad is arranged on the top surface of the bearing end cover, a rubber pad is arranged on the top surface of the lower sealing pad, the sealing pad and the rubber pad are screwed on the top surface of the bearing end cover, and an upper sealing ring is arranged between the inner ring of the rubber pad and the outer ring of the front end of the main shaft; The rear sealing mechanism includes a sleeve arranged on the outer circumferential surface of the rear end of the main shaft, an oil separator ring is arranged on the outer circumferential surface of the main shaft at the lower end of the sleeve, a sleeve is arranged on the outer circumferential surface of the oil separator ring at intervals, the gap between the sleeve and the oil separator ring forms a lubrication gap, a lower sealing ring is arranged on the upper ends of the sleeve and the oil separator ring, and a lubrication assembly is arranged on the outer circumferential surface of the sleeve.

2. The fully hydraulic drilling rig power head according to claim 1, characterized in that: The lubrication assembly includes an oil filling pipe, the outlet end of the oil filling pipe is connected to the lubrication gap in the sleeve, a small joint is connected to the inlet end of the oil filling pipe, an oil nozzle joint is connected to the inlet end of the small joint, and a press-fit oil filling cup is embedded in the oil nozzle joint.

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