Efficient chip removal step drill bit

Abstract

The utility model belongs to the technical field of step drill bits, and particularly relates to an efficient chip removal step drill bit which comprises a first drill bit body, a threaded column is fixedly connected to the upper surface of the first drill bit body, and a threaded cylinder is connected to the surface of the threaded column in a threaded mode. Second drill bits are arranged on the upper surface of the first drill bit and the surface of the threaded cylinder in an attached mode. According to the efficient chip removal step drill bit, through cooperation of the first drill bit body, the threaded column, the threaded cylinder, the second drill bit body, the third drill bit body, the fourth drill bit body, the first groove, the second groove, a vertical plate, a first nut, an annular groove, a strip-shaped column and a drill rod, after the first drill bit body, the second drill bit body, the third drill bit body or the fourth drill bit body are damaged; the step drill bit can be continuously used by independently replacing the first drill bit, the second drill bit, the third drill bit or the fourth drill bit, and meanwhile, a user can accurately control the drilling diameter of the step drill bit through cooperation of a spring, a limiting support and a second nut.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of step drill, concretely relates to a high -efficient chip removal step drill. BACKGROUND

[0002] The step drill is also called step drill or pagoda drill, is mainly used in the thin steel sheet drilling processing within 3mm, a drill bit can replace many drill bits, according to the need processing different diameter hole, and can realize big hole one-time processing, need not to change drill bit and hit positioning hole etc.

[0003] At present, the drill bit is usually designed as an integral type, and then when a certain drilling position of the step drill is damaged, the whole step drill cannot be used continuously, which not only causes material waste, but also increases the use cost, and at the same time, when the step drill is used for drilling, the diameter of the drilled hole is often unqualified due to the inaccurate control of the depth distance of the step drill. UTILITY MODEL CONTENTS

[0004] The utility model discloses a kind of high-efficiency chip removal step drills, solve the problem that the step drill is usually designed as an integral type, and then when a certain drilling position of the step drill is damaged, the whole step drill cannot be used continuously, simultaneously, solve the problem that the diameter of the drilled hole is often unqualified due to the inaccurate control of the depth distance of the step drill when the step drill is used for drilling.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] The utility model provides a high -efficient chip removal step drill bit, including first drill bit, the upper surface of first drill bit is fixedly connected with threaded column, the surface of threaded column is connected with threaded cylinder with thread, the upper surface of first drill bit and the surface of threaded cylinder all set up second drill bit, the upper surface of second drill bit and the surface of threaded cylinder all set up third drill bit, the upper surface of third drill bit and the surface of threaded cylinder all set up fourth drill bit, the upper surface of threaded column is equipped with first recess, the upper surface of threaded cylinder is equipped with second recess, the left and right sides of the inner wall of second drill bit, the left and right sides of third drill bit inner wall and the left and right sides of fourth drill bit inner wall all are fixedly connected with shaft plate, the inner wall of first recess and the inner wall of second recess all are pasted with the surface of shaft plate, the surface of threaded cylinder is connected with first nut with thread, the inner wall of first nut is equipped with annular groove, the inner wall of annular groove is pasted with strip column, the inner wall of threaded cylinder is pasted with drill rod, the inside of drill rod is equipped with through -hole, the inner wall of through -hole is fixedly connected with the surface of strip column, the surface of first drill bit, the surface of second drill bit, the surface of third drill bit and the surface of fourth drill bit all are equipped with spiral chip flute.

[0007] The utility model further sets up that the length of strip column is equal with the inner diameter of annular groove, the center of strip column coincides with the axis of drill rod.

[0008] The utility model further sets up that the upper surface of fourth drill bit is bonded with rubber ring, the bottom of first nut is fixedly connected with first circular ring, the surface of first circular ring is pasted with the inner wall of rubber ring, the upper surface of rubber ring is pasted with the bottom of first nut.

[0009] The utility model further sets up that the upper surface of first nut is pasted with spring, the upper surface of spring and the inner wall of threaded cylinder all are pasted with limit support, the upper surface of limit support is pasted with second nut, the inner wall of second nut is connected with the surface of threaded cylinder with thread.

[0010] The utility model further sets up that limit support includes second circular ring, bearing, connecting column and limit ring, the inner wall of second circular ring is pasted with the surface of threaded cylinder, the upper and lower sides of second circular ring are pasted with the upper surface of spring and the bottom of second nut respectively, the surface of second circular ring is fixedly connected with the inner ring of bearing, the both ends of connecting column are fixedly connected with the upper surface of limit ring and the outer ring of bearing respectively.

[0011] The utility model further sets up that the elasticity of spring is greater than the gravity sum of second circular ring, bearing, connecting column and limit ring, the axis of limit ring coincides with the axis of threaded cylinder.

[0012] The utility model discloses the technical effect that has been achieved:

[0013] The utility model discloses a high -efficient chip removal step drill bit through the cooperation of first drill bit, threaded column, threaded cylinder, second drill bit, third drill bit, fourth drill bit, first recess, second recess, vertical board, first nut, annular groove, strip column and drill rod, can combine or separate between first drill bit, second drill bit, third drill bit, fourth drill bit and drill rod, and when first drill bit, second drill bit, third drill bit or fourth drill bit is damaged, by the separate replacement of first drill bit, second drill bit, third drill bit or fourth drill bit, the step drill bit can continue to use.

[0014] The utility model discloses a high -efficient chip removal step drill bit through the cooperation of spring, second nut and threaded cylinder, makes the position of spacing support change through the rotation of second nut for the user, and when the spacing ring on spacing support contacts with the processing part, the drill bit can not continue to go in through the spacing ring, and then through the cooperation of spring, spacing support and second nut, when the step drill bit is used to the drilling of the processing part, the drilling diameter of the step drill bit can be accurately controlled. ACCURATE

[0015] Figure 1 It is the three-dimensional schematic view of the structure of the utility model;

[0016] Figure 2 It is the right view of the structure of the utility model;

[0017] Figure 3 It is Figure 2 the section view of A-A in

[0018] Figure 4 It is Figure 3 the enlarged view of B in

[0019] Figure 5 It is the right view of threaded column in the utility model;

[0020] Figure 6 It is the right view of threaded cylinder in the utility model;

[0021] Figure 7 It is the plan view of fourth drill bit in the utility model;

[0022] Figure 8 It is the front view of first nut in the utility model;

[0023] Figure 9 It is Figure 8 the section view of C-C in

[0024] Figure 10 It is the bottom view of first nut in the utility model;

[0025] Figure 11 It is the plan view of strip column in the utility model;

[0026] Figure 12 is the right view of the drill rod in the utility model;

[0027] Figure 13 is the plan view of the limiting support in the utility model.

[0028] In the drawings, the components represented by each reference numeral are listed as follows:

[0029] 1, first drill bit; 2, threaded column; 3, threaded cylinder; 4, second drill bit; 5, third drill bit; 6, fourth drill bit; 7, first recess; 8, second recess; 9, vertical plate; 10, first nut; 11, annular groove; 12, strip column; 13, drill rod; 14, through hole; 15, helical chip flute; 16, rubber ring; 17, first circular ring; 18, spring; 19, limiting support; 191, second circular ring; 192, bearing; 193, connecting column; 194, limiting ring; 20, second nut. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purpose, features and advantages of the utility model more apparent, obvious and easy to understand, the specific embodiments of the utility model are described in detail below in conjunction with the drawings of the specification.

[0031] In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the utility model, but the utility model can also be implemented in other ways different from the description herein, and those skilled in the art can make similar generalization without departing from the connotation of the utility model, therefore the utility model is not limited by the specific embodiments disclosed below.

[0032] As Figures 1 to 12As shown, an efficient chip removal step drill bit, including a first drill bit 1, the upper surface of the first drill bit 1 is fixedly connected with a threaded column 2, the surface of the threaded column 2 is threadedly connected with a threaded cylinder 3, the upper surface of the first drill bit 1 and the surface of the threaded cylinder 3 are both provided with a second drill bit 4, the upper surface of the second drill bit 4 and the surface of the threaded cylinder 3 are both provided with a third drill bit 5, the upper surface of the third drill bit 5 and the surface of the threaded cylinder 3 are both provided with a fourth drill bit 6, the upper surface of the threaded column 2 is provided with a first recess 7, the upper surface of the threaded cylinder 3 is provided with a second recess 8, the left and right sides of the inner wall of the second drill bit 4, the left and right sides of the inner wall of the third drill bit 5 and the left and right sides of the inner wall of the fourth drill bit 6 are all fixedly connected with a vertical plate 9, the inner wall of the first recess 7 and the inner wall of the second recess 8 are both in contact with the surface of the vertical plate 9, the surface of the threaded cylinder 3 is threadedly connected with a first nut 10, the inner wall of the first nut 10 is provided with an annular groove 11, the inner wall of the annular groove 11 is provided with a strip-shaped column 12, the inner wall of the threaded cylinder 3 is provided with a drill rod 13, the inside of the drill rod 13 is provided with a through hole 14, the inner wall of the through hole 14 is fixedly connected with the surface of the strip-shaped column 12, the surface of the first drill bit 1, the surface of the second drill bit 4, the surface of the third drill bit 5 and the surface of the fourth drill bit 6 are all provided with a spiral chip removal groove 15.

[0033] Wherein, the length of the strip-shaped column 12 is equal to the inner diameter of the annular groove 11, the center of the strip-shaped column 12 coincides with the axis of the drill rod 13.

[0034] It should be noted that when the threaded column 2 is screwed in the threaded cylinder 3, the first drill bit 1 is fixed on the threaded cylinder 3 through the cooperation of the threaded column 2 and the threaded cylinder 3, and when the second drill bit 4 is sleeved on the threaded cylinder 3, the vertical plate 9 on the second drill bit 4 will be inserted into the first recess 7, and the threaded column 2 cannot rotate in the threaded cylinder 3 through the cooperation of the first recess 7 and the vertical plate 9.

[0035] The second drill bit 4, the third drill bit 5 and the fourth drill bit 6 cannot rotate on the threaded cylinder 3 through the cooperation of the second recess 8 and the vertical plate 9, and the second drill bit 4, the third drill bit 5 and the fourth drill bit 6 are all fixed on the threaded cylinder 3 through the first nut 10 after the first nut 10 is screwed on the threaded cylinder 3.

[0036] The strip-shaped column 12 can rotate freely in the annular groove 11, and the drill rod 13 is fixed in the threaded cylinder 3 through the cooperation of the strip-shaped column 12 and the annular groove 11 after the first nut 10 is screwed on the threaded cylinder 3, and the drill rod 13 cannot rotate in the threaded cylinder 3 through the cooperation of the second recess 8 and the strip-shaped column 12.

[0037] The first drill bit 1, the second drill bit 4, the third drill bit 5 and the fourth drill bit 6 make the stepped drill bit capable of drilling holes with different diameters, wherein the diameter of the first drill bit 1 is smaller than that of the second drill bit 4, the diameter of the second drill bit 4 is smaller than that of the third drill bit 5, the diameter of the third drill bit 5 is smaller than that of the fourth drill bit 6, and the spiral flutes 15 make the drill bit capable of quickly discharging the drillings generated during drilling.

[0038] As shown in Figures 1 to 10 the fourth drill bit 6 is attached with a rubber ring 16, the bottom of the first nut 10 is fixedly connected with a first ring 17, the surface of the first ring 17 is attached with the inner wall of the rubber ring 16, and the upper surface of the rubber ring 16 is attached with the bottom of the first nut 10.

[0039] It should be noted that when the first nut 10 is screwed on the threaded barrel 3 and presses the rubber ring 16, the first nut 10 is not easy to rotate due to vibration through the friction between the rubber ring 16 and the first nut 10 and the first ring 17, thereby preventing the first drill bit 1, the second drill bit 4, the third drill bit 5 and the fourth drill bit 6 from loosening.

[0040] As shown in Figures 1 to 13 the upper surface of the first nut 10 is attached with a spring 18, the upper surface of the spring 18 and the inner wall of the threaded barrel 3 are both attached with a limiting support 19, the upper surface of the limiting support 19 is attached with a second nut 20, and the inner wall of the second nut 20 is threadedly connected with the surface of the threaded barrel 3.

[0041] The limiting support 19 includes a second ring 191, a bearing 192, a connecting column 193 and a limiting ring 194, the inner wall of the second ring 191 is attached with the surface of the threaded barrel 3, the upper and lower sides of the second ring 191 are respectively attached with the upper surface of the spring 18 and the bottom of the second nut 20, the surface of the second ring 191 is fixedly connected with the inner ring of the bearing 192, the two ends of the connecting column 193 are respectively fixedly connected with the upper surface of the limiting ring 194 and the outer ring of the bearing 192, the elastic force of the spring 18 is greater than the sum of the gravity of the second ring 191, the bearing 192, the connecting column 193 and the limiting ring 194, and the axis of the limiting ring 194 coincides with the axis of the threaded barrel 3.

[0042] It should be noted that the second ring 191 on the limiting support 19 is in close contact with the second nut 20 through the elastic force of the spring 18, and the position of the limiting support 19 can be changed by rotating the second nut 20 through the cooperation of the spring 18, the second nut 20 and the threaded barrel 3. Meanwhile, when the limiting ring 194 on the limiting support 19 contacts the processed part, the drill bit cannot continue to penetrate through the limiting ring 194, and the limiting ring 194 does not rotate with the stepped drill bit through the bearing 192 after contacting the processed part.

[0043] The stepped drill bit is assembled by screwing the threaded column 2 into the threaded cylinder 3, fixing the first drill bit 1 on the threaded cylinder 3 through the cooperation of the threaded column 2 and the threaded cylinder 3, then successively sleeving the second drill bit 4, the third drill bit 5 and the fourth drill bit 6 on the threaded cylinder 3 and inserting the vertical plate 9 into the second groove 8, at this time, the threaded column 2 cannot rotate in the threaded cylinder 3 through the cooperation of the first groove 7 and the vertical plate 9, and the second drill bit 4, the third drill bit 5 and the fourth drill bit 6 cannot rotate on the threaded cylinder 3 through the cooperation of the second groove 8 and the vertical plate 9, then screwing the first nut 10 on the threaded cylinder 3, at this time, the second drill bit 4, the third drill bit 5, the fourth drill bit 6 and the drill rod 13 are all fixed on the threaded cylinder 3 through the first nut 10, and the drill rod 13 cannot rotate in the threaded cylinder 3 through the cooperation of the second groove 8 and the strip-shaped column 12.

[0044] When the stepped drill bit is disassembled, the second drill bit 4, the third drill bit 5 and the fourth drill bit 6 can be taken away from the threaded cylinder 3 by screwing the first nut 10 off the threaded cylinder 3, and at the same time, the first drill bit 1 can be separated from the threaded cylinder 3 by screwing the threaded column 2 out of the threaded cylinder 3.

[0045] When the stepped drill bit is used to drill a workpiece, the position of the limiting support 19 on the threaded cylinder 3 is adjusted by rotating the second nut 20, and when the limiting ring 194 on the limiting support 19 contacts the workpiece during drilling, the drill bit cannot continue to penetrate through the limiting ring 194, and at the same time, the chips generated during drilling of the stepped drill bit can be quickly discharged through the spiral-shaped chip removal groove 15.

[0046] The above is only the preferred embodiment of the present application, it should be pointed out that for those skilled in the art, without departing from the principles of the present application, can make a number of improvements and refinements, these improvements and refinements should also be considered as the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application, if no special description and limitation, are implemented according to the conventional means in the art.

Claims

1. A high performance chip-breaker stepped drill bit, characterized by: The utility model provides a drill head, including first drill bit (1), the upper surface of first drill bit (1) is fixedly connected with threaded column (2), the surface of threaded column (2) is threadedly connected with threaded cylinder (3), the upper surface of first drill bit (1) and the surface of threaded cylinder (3) are all set up with second drill bit (4) in conjunction, the upper surface of second drill bit (4) and the surface of threaded cylinder (3) are all set up with third drill bit (5) in conjunction, the upper surface of third drill bit (5) and the surface of threaded cylinder (3) are all set up with fourth drill bit (6) in conjunction, the upper surface of threaded column (2) is equipped with first recess (7), the upper surface of threaded cylinder (3) is equipped with second recess (8), the left and right sides of the inner wall of second drill bit (4), the left and right sides of the inner wall of third drill bit (5) and the left and right sides of the inner wall of fourth drill bit (6) are all fixedly connected with vertical board (9), the inner wall of first recess (7) and the inner wall of second recess (8) are all in conjunction with the surface of vertical board (9), the surface of threaded cylinder (3) is threadedly connected with first nut (10), the inner wall of first nut (10) is equipped with annular groove (11), the inner wall of annular groove (11) is set up with strip column (12) in conjunction, the inner wall of threaded cylinder (3) is set up with drill rod (13) in conjunction, the inside of drill rod (13) is equipped with through -hole (14), the inner wall of through -hole (14) is fixedly connected with the surface of strip column (12), the surface of first drill bit (1), the surface of second drill bit (4), the surface of third drill bit (5) and the surface of fourth drill bit (6) are all equipped with spiral shaped chip flute (15).

2. The high performance chip-breaker stepped drill bit of claim 1, wherein: The length of the strip column (12) is equal to the inner diameter of the annular groove (11), and the center of the strip column (12) coincides with the axis of the drill rod (13).

3. The high performance, fluted, stepped drill bit of claim 1, wherein: The upper surface of the fourth drill bit (6) is bonded with a rubber ring (16), the bottom of the first nut (10) is fixedly connected with a first circular ring (17), the surface of the first circular ring (17) is in conjunction with the inner wall of the rubber ring (16), and the upper surface of the rubber ring (16) is in conjunction with the bottom of the first nut (10).

4. The high performance, fluted, stepped drill bit of claim 1, wherein: The upper surface of the first nut (10) is set up with a spring (18), the upper surface of the spring (18) and the inner wall of the threaded cylinder (3) are all set up with a limiting support (19), the upper surface of the limiting support (19) is set up with a second nut (20), and the inner wall of the second nut (20) is threadedly connected with the surface of the threaded cylinder (3).

5. The high performance, fluted, stepped drill bit of claim 4 wherein: The limiting support (19) includes a second circular ring (191), a bearing (192), a connecting column (193), and a limiting ring (194), the inner wall of the second circular ring (191) is in conjunction with the surface of the threaded cylinder (3), the upper and lower sides of the second circular ring (191) are respectively in conjunction with the upper surface of the spring (18) and the bottom of the second nut (20), the surface of the second circular ring (191) is fixedly connected with the inner ring of the bearing (192), and the two ends of the connecting column (193) are respectively fixedly connected with the upper surface of the limiting ring (194) and the outer ring of the bearing (192).

6. A high performance chip-breaker stepped drill according to claim 5 wherein: The spring (18) has a spring force greater than the sum of the gravity of the second circular ring (191), the bearing (192), the connecting column (193) and the limiting ring (194), and the axis of the limiting ring (194) coincides with the axis of the threaded cylinder (3).

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