A self-lubricating magnetic drill bit for avoiding jamming

Abstract

The present invention relates to the technical field of drill bits, and discloses a self-lubricating magnetic base drill bit that avoids jamming, comprising a joint, an oil chamber, a driving head, a cutter head, an oil plate, an oil spray head, and an L-shaped oil groove. The inner wall of the driving head is movably connected with a pumping mechanism, and the pumping mechanism comprises a transfer chamber, a one-way tube is fixedly connected to the top of the transfer chamber, a membrane capsule is fixedly connected to the inner wall of the transfer chamber, and a magnetic rod connected to the membrane capsule is slidably inserted into the inner wall of the transfer chamber. The self-lubricating magnetic base drill bit that avoids jamming controls the pressing of an appropriate amount of lubricating oil into each passage L-shaped oil groove based on the centrifugal force of the membrane capsule and the intermittent attraction of the magnetic wheel, cooperates with positioning the L-shaped oil groove inside the curved groove, and designs the L-shaped oil groove port to be parallel to the axis of the cutter head to avoid sputtering, and cooperates with using a push rod to clear the output ports of the L-shaped oil grooves on both sides, thereby effectively avoiding jamming of the drill bit, ensuring stable lubrication and avoiding oil waste.

Description

Technical Field

[0001] The invention relates to the technical field of drill bits, in particular to a self-lubricating magnetic base drill bit capable of avoiding jamming. Background Art

[0002] At present, when a magnetic drill is used to drill and cut objects with metal structures, since the drill bit generates a large amount of heat and there is a rigid contact between the drill bit and the metal structure, it is necessary to continuously add lubricating oil to cool and lubricate the drill bit. In order to ensure that the drill bit can also be cooled and lubricated inside the metal structure, an oil guide groove extending to the curved groove area on the drill bit surface is generally opened inside the drill bit. Since the lubricating oil is generally output under the drive of gravity and the heat of the drill bit, it is difficult to effectively adjust the amount of lubricating oil. When the cooling lubrication obtained by the high output of the drill bit cannot meet the requirements, the drill bit is at risk of breaking or deflecting and jamming due to uneven force. In addition, there is also a risk of the oil guide groove being blocked by metal chips during the continuous drilling of the drill bit. Since it is difficult for the lubricating oil to flush the metal blockage from the inside, some areas of the drill bit cannot be effectively cooled and lubricated. Moreover, since the release direction of the lubricating oil is perpendicular to the axis of the drill bit, when the drill bit has not fully drilled into the metal structure, most of the lubricating oil will be thrown out under the action of centrifugal force, resulting in waste. Summary of the invention

[0003] In order to solve the problems of the drill bit being easily stuck, the lubrication being not stable and the oil being easily wasted during the use of the above-mentioned general self-lubricating magnetic drill bit, and to achieve the above purpose of efficiently avoiding the jamming of the drill bit, ensuring stable lubrication and avoiding oil waste, the present invention is implemented through the following technical scheme: a self-lubricating magnetic drill bit that avoids jamming, comprising a joint, an oil chamber, a drive head, a cutter head, an oil plate, an oil spray head, and an L-shaped oil groove, the inner wall of the drive head being movably connected with a pumping mechanism, the pumping mechanism comprising a transfer chamber, the top of the transfer chamber being fixedly connected with a one-way tube, the inner wall of the transfer chamber being fixedly connected with a membrane capsule, the inner wall of the transfer chamber being slidably connected with a magnetic rod connected to the membrane capsule, the top surface of the oil plate being rotatably connected with a magnetic wheel, and the inner wall of the drive head being rotatably connected with a conical screw meshing with the magnetic wheel.

[0004] Furthermore, oil chambers are provided on both sides of the left and right sides of the joint, the bottom of the joint is drivingly connected to a driving head, the bottom of the driving head is fixedly connected to a cutter head, the middle of the cutter head is fixedly connected to an oil plate extending into the driving head, the outer wall of the cutter head is fixedly connected to an oil spray head, and L-shaped oil grooves are provided on the upper and lower sides of the oil spray head.

[0005] Furthermore, a tooth groove meshing with the conical screw is provided at the bottom of the joint, so that when the drive head rotates, the conical screw can be driven to rotate by the tooth groove meshing, thereby driving the magnetic wheel to adjust the oil supply and dredging.

[0006] Furthermore, the transfer chamber is annular and has a side wall with an annular groove corresponding to the oil chamber, and a one-way channel is included between the annular groove and the oil chamber, so that when the membrane bag is deformed, agitated and contracted, the lubricating oil in the oil chamber can be sucked into the transfer chamber and then pressed into the one-way tube.

[0007] Furthermore, the upper and lower sides of the magnetic wheel include magnetic poles opposite to the magnetic poles on the side opposite to the magnetic rod, so that when the magnetic wheel rotates continuously, it can intermittently attract the magnetic rod to move to adjust the oil supply and lubrication.

[0008] Furthermore, the oil plate is provided with oil supply grooves corresponding to the one-way pipe and the oil spray head respectively on both sides to facilitate the output of lubricating oil.

[0009] Furthermore, a side port of the L-shaped oil groove close to the outer wall of the cutter head is parallel to the axis of the cutter head, and a curved groove corresponding to the oil spray head is provided on the outer wall of the cutter head, so that the L-shaped oil groove releases lubricating oil outward, and when the oil pressure is too high, this design can play a buffering role by using the upper and lower groove walls of the curved groove.

[0010] Furthermore, it also includes a dredging mechanism, which is movably connected to the inner wall of the oil spray head. The dredging mechanism includes a push rod, and the inner wall of the oil spray head is slidably connected with a pin rod, a pin sheet is movably connected between the pin rod and the push rod, an adjusting wheel is rotatably connected to the side of the oil plate surface close to the push rod, and a chain belt is movably clamped between the adjusting wheel and the magnetic wheel.

[0011] Furthermore, an elliptical groove coaxial with the adjusting wheel is provided on the surface, and the end of the pin rod includes a protruding portion extending into the elliptical groove, so that when the adjusting wheel continues to operate, the pin rod is driven to allow the push rod to clear the L-shaped oil groove.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The self-lubricating magnetic drill bit that avoids jamming, when the cutter head is driven to rotate by the output of the driving head, the magnetic wheel can synchronously slow down the rotation. During this period, the membrane capsule squeezes the lubricating oil in the transfer chamber under the action of centrifugal force, and the magnetic wheel intermittently attracts the magnetic rod to drive the membrane capsule back to its position, so that the L-shaped oil groove in the passage of each oil injection head can overflow with lubricating oil. During this period, the amount of lubricating oil overflow is directly proportional to the rotation speed of the driving head, so that the cutter head can get enough matching lubricating oil protection. Since the release port of the L-shaped oil groove is parallel to the axis of the cutter head, the high-pressure oil can be buffered and sputtering can be avoided. The soft squeezing of the membrane capsule can ensure the appropriate output oil pressure of the lubricating oil. This design effectively avoids the jamming of the drill bit.

[0014] 2. The self-lubricating magnetic drill bit that avoids jamming drives the chain belt to operate by slowing down the magnetic wheel relative to the driving head, thereby allowing each adjusting wheel to rotate continuously, which drives the pin rod to move back and forth, and controls the ejector rod to clear the output ports of the L-shaped oil grooves on both sides respectively. This design can also control the staggered output of lubricating oil from the L-shaped oil grooves on both sides, thereby ensuring uniform lubrication of the cutter head under different drilling and cutting environments, thereby ensuring stable lubrication and avoiding oil waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a main cross-sectional view of the present invention;

[0016] Figure 2 A three-dimensional diagram of the connection part of the cutter head of the present invention;

[0017] Figure 3 It is a front cross-sectional view of the connecting part of the cutter head of the present invention;

[0018] Figure 4 It is a front cross-sectional view of the connecting portion of the drive head of the present invention;

[0019] Figure 5 for Figure 4 The enlarged view of point A in the middle;

[0020] Figure 6 It is a front cross-sectional view of the connecting part of the fuel injection head of the present invention.

[0021] In the figure: 1. joint; 2. oil chamber; 3. drive head; 4. cutter head; 5. oil plate; 6. oil spray head; 7. L-shaped oil groove; 8. pumping mechanism; 81. transfer chamber; 82. one-way tube; 83. membrane sac; 84. magnetic rod; 85. magnetic wheel; 86. tapered screw; 9. dredging mechanism; 91. push rod; 92. pin rod; 93. pin piece; 94. adjusting wheel; 95. chain belt. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The embodiment of the self-lubricating magnetic drill bit for avoiding jamming is as follows:

[0024] See also Figure 1-Figure 6A self-lubricating magnetic drill bit for avoiding jamming includes a joint 1, an oil chamber 2, a driving head 3, a cutter head 4, an oil plate 5, an oil spray head 6, and an L-shaped oil groove 7. The joint 1 has oil chambers 2 on both sides thereof. The bottom of the joint 1 has a tooth groove engaged with a conical screw 86, so that when the driving head 3 rotates, the conical screw 86 can be driven to rotate by the tooth groove engagement, so as to drive a magnetic wheel 85 to adjust oil supply and dredge.

[0025] The bottom of the joint 1 is drivenly connected to a driving head 3, and the bottom of the driving head 3 is fixedly connected to a cutter head 4. An oil plate 5 extending into the driving head 3 is fixedly inserted in the middle of the cutter head 4. The left and right sides of the oil plate 5 are provided with oil supply grooves corresponding to the one-way pipe 82 and the oil spray head 6 respectively, so as to facilitate the output of lubricating oil. The outer wall of the cutter head 4 is fixedly connected to the oil spray head 6, and the upper and lower sides of the oil spray head 6 are provided with L-shaped oil grooves 7. The side port of the L-shaped oil groove 7 close to the outer wall of the cutter head 4 is parallel to the axis of the cutter head 4. The outer wall of the cutter head 4 is provided with a curved groove corresponding to the oil spray head 6, so that the L-shaped oil groove 7 releases the lubricating oil outward, and when the oil pressure is too large, this design can play a buffering role by using the upper and lower groove walls of the curved groove.

[0026] The inner wall of the driving head 3 is movably connected with a pumping mechanism 8, and the pumping mechanism 8 includes a transfer chamber 81, a one-way tube 82 is fixedly connected to the top of the transfer chamber 81, a membrane capsule 83 is fixedly connected to the inner wall of the transfer chamber 81, and a magnetic rod 84 connected to the membrane capsule 83 is slidably inserted into the inner wall of the transfer chamber 81. The top surface of the oil plate 5 is rotatably connected with a magnetic wheel 85, and the upper and lower sides of the magnetic wheel 85 include magnetic poles opposite to the magnetic poles on the opposite side of the magnetic rod 84, so that the magnetic wheel 85 can intermittently attract the magnetic rod 84 to move when it rotates continuously, so as to adjust the oil supply and lubrication. The inner wall of the driving head 3 is rotatably connected with a conical screw 86 meshing with the magnetic wheel 85. The transfer chamber 81 is annular and has a ring groove corresponding to the oil chamber 2 on its side wall. A one-way channel is included between the ring groove and the oil chamber 2, so that when the membrane capsule 83 is deformed, agitated, and contracted, the lubricating oil in the oil chamber 2 can be sucked into the transfer chamber 81 and then pressed into the one-way tube 82.

[0027] When the cutter head 4 is driven to rotate through the output of the driving head 3, the magnetic wheel 85 can synchronously slow down its rotation. During this period, the membrane capsule 83 squeezes the lubricating oil in the transfer chamber 81 under the action of centrifugal force, and the magnetic wheel 85 intermittently attracts the magnetic rod 84 to drive the membrane capsule 83 back to its position, so that the L-shaped oil groove 7 in the passage of each oil injection head 6 can overflow with lubricating oil. During this period, the amount of lubricating oil overflow is directly proportional to the rotation speed of the driving head 3, so that the cutter head 4 can obtain sufficient matching lubricating oil protection. Since the release port of the L-shaped oil groove 7 is parallel to the axis of the cutter head 4, the high-pressure oil can be buffered and splashing can be avoided. The soft squeezing of the membrane capsule 83 can ensure the appropriate output oil pressure of the lubricating oil. This design effectively avoids the jamming of the drill bit.

[0028] The dredging mechanism 9 is movably connected to the inner wall of the oil spray head 6, and the dredging mechanism 9 includes a push rod 91. The inner wall of the oil spray head 6 is slidably connected with a pin rod 92, and a pin piece 93 is movably connected between the pin rod 92 and the push rod 91. An adjusting wheel 94 is rotatably connected to the side of the surface of the oil plate 5 close to the push rod 91. An elliptical groove coaxial with the adjusting wheel 94 is opened on the surface of the adjusting wheel 94. The end of the pin rod 92 includes a protruding portion extending into the elliptical groove, so that when the adjusting wheel 94 continues to operate, it drives the pin rod 92 to make the push rod 91 dredge the L-shaped oil groove 7, and a chain belt 95 is movably clamped between the adjusting wheel 94 and the magnetic wheel 85.

[0029] By utilizing the magnetic wheel 85 to reduce the speed relative to the driving head 3 to drive the chain belt 95 to operate, each adjusting wheel 94 can be continuously rotated, which causes the pin rod 92 to be driven to move back and forth, and the control push rod 91 is used to clear the output ports of the L-shaped oil grooves 7 on both sides respectively. This design can also control the staggered output of lubricating oil by the L-shaped oil grooves 7 on both sides, thereby ensuring uniform lubrication of the cutter head 4 under different drilling and cutting environments, thereby ensuring stable lubrication and avoiding oil waste.

[0030] Working principle: When in use, the drive head 3 is driven by an external drive to output so that the cutter head 4 rotates, and the conical screw 86 is guided by the tooth groove meshing to drive the magnetic wheel 85 to rotate continuously. During this period, the membrane capsule 83 squeezes the lubricating oil in the transfer chamber 81 under the action of centrifugal force, so that it is pressed through the one-way tube 82 and the oil plate 5, and then overflows from the L-shaped oil groove 7 in each oil spray head 6. Since the amount of lubricating oil overflow is proportional to the rotation speed of the drive head 3, the cutter head 4 can get enough matching lubricating oil protection when drilling and cutting at high intensity. Correspondingly, in this case, since the final release flow rate and pressure of the lubricating oil are relatively large, and since the release port of the L-shaped oil groove 7 is parallel to the axis of the cutter head 4, and the oil spray head 6 is installed inside the curved groove, the high-pressure oil can be buffered by the inner wall of the curved groove and splashing is avoided. Moreover, since the extrusion of the lubricating oil relies on the membrane capsule 83 that is deformed due to the centrifugal force, this extrusion output does not belong to hard extrusion, because When the lubricating oil output pressure is sufficient, the membrane bag 83 is difficult to deform further, which also ensures the appropriateness of the lubricating oil output oil pressure. In addition, since the rotation speed of the magnetic wheel 85 can be slowed down relative to the output speed of the drive head 3, as the magnetic wheel 85 runs, it intermittently and synchronously attracts the magnetic rods 84 on both sides, and then the membrane bag 83 can assist in extracting new lubricating oil and replenishing the transfer chamber 81. This design effectively avoids the jamming of the drill bit. In addition, when the magnetic wheel 85 rotates, it will reduce the speed relative to the drive head 3 to drive the chain belt 95 to operate, and then each adjusting wheel 94 can continue to rotate, which drives the pin rod 92 to move back and forth, so as to use the pin sheet 93 to push and pull the push rod 91 to intermittently clear the output ports of the L-shaped oil grooves 7 on both sides, and this design can also control the staggered output of lubricating oil by the L-shaped oil grooves 7 on both sides, thereby ensuring uniform lubrication of the cutter head 4 under different drilling and cutting environments, thereby ensuring stable lubrication and avoiding oil waste.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-lubricating magnetic drill bit for preventing jamming, comprising a joint (1), an oil chamber (2), a drive head (3), a cutter head (4), an oil plate (5), an oil spray head (6), and an I-type oil groove (7), characterized in that: The inner wall of the driving head (3) is movably connected to a pumping mechanism (8), the pumping mechanism (8) comprises a transfer chamber (81), the top of the transfer chamber (81) is fixedly connected to a one-way tube (82), the inner wall of the transfer chamber (81) is fixedly connected to a membrane capsule (83), the inner wall of the transfer chamber (81) is slidably connected to a magnetic rod (84) connected to the membrane capsule (83), the top surface of the oil plate (5) is rotatably connected to a magnetic wheel (85), the inner wall of the driving head (3) is rotatably connected to a conical screw rod (86) meshing with the magnetic wheel (85); and also comprises a dredging mechanism (9), the dredging mechanism (9) is movably connected to the inner wall of the oil injection head (6), the dredging mechanism (9) comprises a push rod (91), the inner wall of the oil injection head (6) is slidably connected to a pin rod (92), the pin rod (92) is connected to the push rod (91) is movably connected with a pin sheet (93); the surface of the oil plate (5) close to the top rod (91) is rotatably connected with an adjusting wheel (94); a chain belt (95) is movably connected between the adjusting wheel (94) and the magnetic wheel (85); the surface of the adjusting wheel (94) is provided with an elliptical groove coaxial with the adjusting wheel (94); the end of the pin rod (92) includes a protruding portion extending into the elliptical groove; the inside of the joint (1) is provided with oil chambers (2) on both left and right sides; the bottom of the joint (1) is drivably connected with a driving head (3); the bottom of the driving head (3) is fixedly connected with a cutter head (4); the middle of the cutter head (4) is fixedly plugged with an oil plate (5) extending into the driving head (3); the outer wall of the cutter head (4) is fixedly plugged with an oil spray head (6); the upper and lower sides of the oil spray head (6) are provided with L The joint (1) has a tooth groove at the bottom thereof, which meshes with the conical screw rod (86); the transfer chamber (81) is annular and has a side wall with an annular groove corresponding to the oil chamber (2); the upper and lower sides of the magnetic wheel (85) include magnetic poles opposite to the magnetic poles on the side opposite to the magnetic rod (84); the left and right sides of the oil plate (5) are provided with oil supply grooves corresponding to the one-way pipe (82) and the oil spray head (6) respectively; the joint (1) has a tooth groove at the bottom thereof, which meshes with the conical screw rod (86), so that when the driving head (3) rotates, the conical screw rod (86) can be meshed with the tooth groove to drive the magnetic wheel (85) to adjust the oil supply and dredge.

2. A self-lubricating magnetic drill bit for avoiding jamming according to claim 1, characterized in that: A port on one side of the L-shaped oil groove (7) close to the outer wall of the cutter head (4) is parallel to the axis of the cutter head (4).

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