CN211314093U

CN211314093U - Drill bit mounting structure of screw drilling tool

Info

Publication number: CN211314093U
Application number: CN201921467017.2U
Authority: CN
Inventors: 叶俊杰; 徐永和; 王涛; 刘华文
Original assignee: Yancheng Xinyongjia Petroleum Machinery Manufacturing Co ltd
Current assignee: Yancheng Xinyongjia Petroleum Machinery Manufacturing Co ltd
Priority date: 2019-09-05
Filing date: 2019-09-05
Publication date: 2020-08-21
Anticipated expiration: 2029-09-05

Abstract

The utility model discloses a screw drilling tool's drill bit mounting structure relates to drilling equipment technical field, including screw drilling tool main part and drill bit. The screw drill main body comprises a cylinder body and a transmission shaft. The drill bit is arranged at the bottom of the cylinder body and is in transmission connection with the transmission shaft. The transmission shaft comprises a first shaft body, and a clamping groove is formed in the end part, close to the drill bit, of the first shaft body; an annular clamping block is concentrically arranged in the clamping groove. The drill bit comprises a rod part and a head part connected with the rod part, and the end part of the rod part, far away from the head part, is provided with an annular clamping groove. The annular clamping block can be clamped and fixed in the annular clamping groove to lock or separate the transmission shaft and the drill bit. The utility model discloses a drill bit mounting structure can realize that being connected between drill bit and the transmission shaft is more firm, avoids mechanical vibration to guarantee drilling operation precision to the emergence of the skew condition in drill bit axle center.

Description

Drill bit mounting structure of screw drilling tool

Technical Field

The utility model relates to a drilling equipment technical field, in particular to screw rod drilling tool's drill bit mounting structure.

Background

The screw drilling tool is a positive displacement downhole power drilling tool which takes drilling fluid as power and converts liquid pressure energy into mechanical energy. When slurry pumped by the slurry pump flows through the bypass valve and enters the motor, a certain pressure difference is formed between the inlet and the outlet of the motor, the rotor is pushed to rotate around the axis of the stator, and the rotating speed and the torque are transmitted to the drill bit through the universal shaft and the transmission shaft, so that the drilling work is realized.

The connection between the drill bit and the transmission shaft of the conventional screw drill is not stable enough, so that the drill bit is easy to deviate from the axis in time due to mechanical vibration generated in the process of high-speed rotation of the drill bit, the precision of drilling operation is influenced, and the damaged drill bit is inconvenient to disassemble.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a screw drilling tool's drill bit mounting structure can make the connection between drill bit and the transmission shaft more firm.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a drill bit mounting structure of a screw drill comprises a screw drill main body and a drill bit, wherein the screw drill main body comprises a cylinder body and a transmission shaft, and the transmission shaft is accommodated in the cylinder body; the transmission shaft can axially rotate relative to the cylinder body; the transmission shaft comprises a first shaft body, and a clamping groove is formed in the end part, close to the drill bit, of the first shaft body; an annular clamping block is concentrically arranged in the clamping groove; the drill bit is arranged at the bottom of the cylinder and is in transmission connection with the transmission shaft; the drill bit comprises a rod part and a head part connected with the rod part, and an annular clamping groove is formed in the end part, far away from the head part, of the rod part

The annular clamping block can be clamped and fixed in the annular clamping groove to lock or separate the transmission shaft and the drill bit.

Preferably, the inner peripheral side of the annular fixture block is provided with a salient point; and grooves matched with the salient points are formed in the groove walls on the inner sides of the annular clamping grooves.

Preferably, the notch of the clamping groove axially extends to be staggered with the annular clamping block to form a locking part.

Preferably, the locking part and the drill bit are locked and fixed through a threaded connection piece.

Preferably, the screw thread connecting member includes a screw groove opened on an outer peripheral side of the screw thread connecting portion, and a locking screw fixed in the screw groove, and a threaded end of the locking screw passes through the screw groove and is connected with the rod portion.

Preferably, the threaded connection piece further comprises a through hole groove and a thread groove, the through hole groove is formed in the screw groove, the thread groove is formed in the rod portion, and the threaded end of the locking screw penetrates through the through hole groove to be in threaded connection with the screw groove.

Preferably, a slot cover is movably arranged at the notch of the screw slot.

Preferably, one end of the slot cover is connected with the screw slot through a hinge.

Preferably, the screw drill main body further comprises a bypass valve, a drill driving motor and a cardan shaft, wherein the bypass valve is arranged at the top end of the barrel; the drilling tool driving motor is accommodated in a cylinder at the bottom of the bypass valve; the universal shaft is accommodated in the cylinder at the bottom of the drilling tool driving motor, and the top end of the universal shaft is connected with the drilling tool driving motor.

Preferably, the transmission shaft further comprises a second shaft body, the bottom end of the second shaft body is fixedly connected with the top end of the first shaft body, and the top end of the second shaft body is connected with the bottom end of the universal shaft.

The utility model has the advantages as follows:

1. the utility model discloses a drill bit mounting structure can realize that the connection between drill bit and the transmission shaft is more firm, avoids mechanical oscillation to the emergence of the skew condition in drill bit axle center, guarantees drilling operation precision;

2. the utility model discloses an annular fixture block of transmission shaft and the ring groove's of drill bit each other insert to close, realize the fixed between transmission shaft and drill bit to further locking through threaded connection spare drill bit and transmission shaft that the plug-in is in the same place, not only making the drill bit more firm with being connected of transmission shaft, also being convenient for simultaneously dismantle the change to the drill bit after damaging, the practicality is high.

Drawings

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

FIG. 2 is a schematic partial cross-sectional view of the propeller shaft of FIG. 1;

FIG. 3 is an enlarged, fragmentary view taken at A in FIG. 2;

FIG. 4 is a cross-sectional schematic view of the drill bit of FIG. 1.

In the figure: 10. a barrel; 20. a bypass valve; 30. a drill drive motor; 40. a cardan shaft; 50. a drive shaft; 51. a first shaft body; 511. a clamping groove; 512. an annular fixture block; 513. salient points; 514. a screw slot; 515. a through hole slot; 516. locking the screw; 517. a slot cover; 52. a second shaft body; 60. a drill bit; 61. a rod portion; 611. an annular neck; 612. a groove; 613. a thread groove; 62. a head portion.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly. In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1 to 4, the drill mounting structure of the screw drill includes a screw drill main body and a drill 60, the screw drill main body includes a cylinder 10 and a transmission shaft 50, and the transmission shaft 50 is accommodated in the cylinder 10; the drill bit 60 can axially rotate relative to the barrel 10; the transmission shaft 50 comprises a first shaft body 51, and the end part of the first shaft body 51, which is close to the drill bit 60, is provided with a clamping groove 511; an annular fixture block 512 is concentrically arranged in the clamping groove 511; the drill bit 60 is arranged at the bottom of the cylinder 10 and is in transmission connection with the transmission shaft 50; the drill 60 comprises a rod part 61 and a head part 62 connected with the rod part 61, and the end part of the rod part 61 far away from the head part 62 is provided with an annular clamping groove 611; the annular fixture block 512 can be clamped and fixed in the annular fixture groove 611 to lock or separate the transmission shaft 50 and the drill bit 60, the drill bit 60 and the transmission shaft 50 can be connected more stably through the drill bit mounting structure, the occurrence of the eccentric condition of the axis of the drill bit 60 caused by mechanical vibration is avoided, and the drilling operation precision is ensured.

Referring to fig. 2 and 4, preferably, a convex point 513 is disposed on the inner circumferential side of the annular fixture block 512; the groove wall on the inner side of the ring-shaped clamping groove 611 is provided with a groove 612 matched with the convex point 513, and the convex point 513 and the groove 612 can fix the connected ring-shaped clamping block 512 and the ring-shaped clamping groove 611.

Referring to fig. 1 and 2, the notch of the clamping groove 511 extends axially to form a locking portion by being staggered with the annular clamping block 512, further, the locking portion is locked and fixed with the drill bit 60 through a threaded connector, and the locking portion can further fix the annular clamping block 512 and the annular clamping groove 611 connected together, so that the connection between the transmission shaft 50 and the drill bit 60 is more stable.

Referring to fig. 1, 3 and 4, the threaded connection member includes a screw groove 514, a through-hole groove 515, a locking screw 516 and a screw groove 613, the screw groove 514 is opened on the outer peripheral side of the threaded connection portion, the locking screw 516 is fixed in the screw groove 514, and a threaded end of the locking screw 516 is connected to the rod portion 61 through the screw groove 514, further, the through-hole groove 515 is opened in the screw groove 514, the screw groove 613 is opened in the rod portion 61, and a threaded end of the locking screw 516 is threaded with the screw groove 514 through the through-hole groove 515. The drive shaft 50 and the drill 60, which are inserted together, can be locked by the locking screw 516, so that the rod 61 is prevented from axially rotating in the snap-in groove 511 of the first shaft body 51.

Referring to fig. 3, the movable capping 517 that is provided with of notch department of screw groove 514, capping 517 can be to the effective protection of locking screw 516 in screw groove 514, the outside of capping 517 covers simultaneously has the wear-resistant material layer, the degree of wear-resisting of capping 517 has been increased, furthermore, the one end of capping 517 is passed through the hinge and is connected with screw groove 514, make things convenient for people to open or close of capping 517, can be connected fixedly between the other end of capping 517 in this embodiment and screw groove 514 through the buckle.

In other embodiments, the slot cover 517 may be integrally connected with the screw slot 514 through a torsion spring, so as to open or close the slot cover 517 on the screw slot 514.

Referring to fig. 1, the screw drill body further includes a bypass valve 20, a drill driving motor 30, and a universal shaft 40, the bypass valve 20 being disposed at the top end of the cylinder 10; the drill driving motor 30 is housed in the cylinder 10 at the bottom of the bypass valve 20; the universal shaft 40 is accommodated in the cylinder 10 at the bottom of the tool driving motor 30, and the top end of the universal shaft 40 is connected to the tool driving motor 30. Since the connection between the bypass valve 20, the tool drive motor 30 and the cardan shaft 40 is known in the art, it will not be described in more detail here.

Referring to fig. 1, the transmission shaft 50 further includes a second shaft body 52, a bottom end of the second shaft body 52 is fixedly connected to a top end of the first shaft body 51, and a top end of the second shaft body 52 is connected to a bottom end of the universal shaft 40. In this embodiment, the connection mode between the second shaft body 52 and the first shaft body 51 is welded integrally, and in other embodiments, the connection mode between the second shaft body 52 and the first shaft body 51 may also be detachably connected through a screw, and other connection modes may also be used as long as the stability of the connection structure between the second shaft body 52 and the first shaft body 51 is not affected.

The above description specifically describes the preferred embodiment of the present invention, but of course, the present invention can also adopt different forms from the above embodiments, and equivalent changes or corresponding modifications made by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope of the present invention.

Claims

1. A drill bit mounting structure of a screw drill, comprising:

the screw drill comprises a screw drill body, a drill body and a drill rod, wherein the screw drill body comprises a barrel body and a transmission shaft, and the transmission shaft is accommodated in the barrel body; the transmission shaft can axially rotate relative to the cylinder body; and

the drill bit is arranged at the bottom of the cylinder and is in transmission connection with the transmission shaft;

the transmission shaft is characterized by comprising a first shaft body, wherein a clamping groove is formed in the end part, close to the drill bit, of the first shaft body; an annular clamping block is concentrically arranged in the clamping groove;

the drill comprises a rod part and a head part connected with the rod part, and an annular clamping groove is formed in the end part, far away from the head part, of the rod part;

2. The drill mounting structure of a progressive cavity drill according to claim 1, wherein a convex point is provided on an inner peripheral side of the annular fixture block; and grooves matched with the salient points are formed in the groove walls on the inner sides of the annular clamping grooves.

3. The drill bit mounting structure of a progressive cavity drill according to claim 1, wherein the notch of the catching groove extends axially to be misaligned with the annular catching block to form the locking portion.

4. The drill bit mounting structure of a progressive cavity drill according to claim 3, wherein the locking portion is locked and fixed to the drill bit by a screw connection member.

5. The drill bit mounting structure of a progressive cavity drill according to claim 4, wherein the threaded connector includes a screw groove opened on an outer peripheral side of the threaded connection portion and a locking screw fixed in the screw groove, and a threaded end of the locking screw is connected to the shank portion through the screw groove.

6. The drill bit mounting structure of a progressive cavity drill according to claim 5, wherein the threaded connector further comprises a through hole groove and a thread groove, the through hole groove is formed in the screw groove, the thread groove is formed in the shank, and the threaded end of the locking screw passes through the through hole groove and is threadedly connected with the screw groove.

7. The drill bit mounting structure of a progressive cavity drill according to claim 5, wherein a slot cover is movably provided at a notch of the screw slot.

8. The drill bit mounting structure of a progressive cavity drill according to claim 7, wherein one end of the slot cover is connected to the screw slot by a hinge.

9. The drill mounting structure of a progressive cavity drill according to claim 1, wherein the progressive cavity drill main body further comprises a bypass valve, a drill driving motor, and a cardan shaft, the bypass valve being provided at a top end of the cylinder; the drilling tool driving motor is accommodated in a cylinder at the bottom of the bypass valve; the universal shaft is accommodated in the cylinder at the bottom of the drilling tool driving motor, and the top end of the universal shaft is connected with the drilling tool driving motor.

10. The drill bit mounting structure of the screw drill according to claim 9, wherein the transmission shaft further comprises a second shaft body, the bottom end of the second shaft body is fixedly connected with the top end of the first shaft body, and the top end of the second shaft body is connected with the bottom end of the universal shaft.