Impact-resistant screw drill

Abstract

The present invention relates to the technical field of drilling equipment, and specifically discloses an impact-resistant screw drill, including an outer shell, a rotating shaft, a buffer sleeve, a connecting joint and a first buffer assembly, wherein the rotating shaft is rotatably installed inside the outer shell, the lower end of the rotating shaft extends out of the outer shell, and the lower end of the rotating shaft is sleeved with a buffer sleeve and a connecting joint, and the first buffer assembly includes a first wedge block, a slider, a second wedge block and a first spring, the slider is slidably arranged in a sliding groove, the bottom of the first wedge block is fixedly connected to the slider, the second wedge block is fixedly connected to the connecting joint, one end of the first spring is fixedly connected to the side wall of the sliding groove, the other end of the first spring is fixedly connected to the first wedge block, and the inclined surface of the first wedge block and the inclined surface of the second wedge block are mutually adapted. The above-mentioned structural arrangement is used to achieve a shock-absorbing effect on the vibration force exerted on the drill bit, thereby improving the impact resistance of the screw drill.

Description

Technical Field

[0001] The invention relates to the technical field of drilling equipment, in particular to an impact-resistant screw drilling tool. Background Art

[0002] During drilling, the drill tools and drill bits are under high drilling pressure and output large torque through the drill tools to drill. In particular, the gear teeth continuously crush the rock to drill. The moment the carbon stone is crushed by pressure, vibration and impact are generated. This is often particularly prominent in gravel layers or bottom layers with high hardness and poor stability, and even drill jumping may occur. If drill jumping occurs, resonance will occur, which can cause the drill tools to jump together, which is extremely destructive to the drill tools. Summary of the invention

[0003] The object of the present invention is to provide an impact-resistant screw drill, which can reduce or eliminate drill jumping and impact vibration when drilling in a drill jumping bottom layer, and reduce damage to the screw drill.

[0004] To achieve the above-mentioned purpose, the present invention adopts an impact-resistant screw drill, comprising an outer shell, a rotating shaft, a buffer sleeve, a connecting joint and a first buffer assembly, wherein the rotating shaft is rotatably mounted inside the outer shell, the lower end of the rotating shaft extends out of the outer shell, the lower end of the rotating shaft is sleeved with the buffer sleeve and the connecting joint, and the lower end of the connecting joint is provided with a mounting hole for mounting a drill bit;

[0005] The outer side wall of the rotating shaft is provided with a side groove and a sliding groove located at the inner bottom of the side groove, the first buffer assembly includes a first wedge block, a slider, a second wedge block and a first spring, the slider is slidably arranged in the sliding groove, the bottom of the first wedge block is fixedly connected to the slider, the second wedge block is fixedly connected to the connecting joint, one end of the first spring is fixedly connected to the side wall of the sliding groove, the other end of the first spring is fixedly connected to the first wedge block, and the inclined surface of the first wedge block and the inclined surface of the second wedge block are adapted to each other.

[0006] The rotation of the rotating shaft drives the connecting joint to rotate, thereby driving the drill bit to drill and realize drilling. When the drill bit is subjected to impact force or force vibration during the drilling process, the drill bit is subjected to a resisting force, thereby resisting the connecting joint to move upward along the axial line direction of the rotating shaft, and at this time driving the second wedge block to move upward. Since the inclined surface of the first wedge block and the inclined surface of the second wedge block are adapted to each other, as the second wedge block moves upward, it resists the first wedge block, driving the slider to move in the sliding groove, and at the same time, the first spring is compressed after being subjected to force, thereby achieving a shock-absorbing effect on the vibration force exerted on the drill bit and improving the impact resistance of the screw drill.

[0007] Among them, the lower end of the buffer sleeve has a first annular recess, the connecting joint includes a joint body and an annular body, the joint body is sleeved on the lower end of the rotating shaft, the annular body is fixedly connected to the upper end of the joint body, and the annular body is gap-fitted with the first annular recess.

[0008] When the rotating shaft drives the joint body to rotate, it can drive the annular body to rotate in a circle, and through the clearance fit between the annular body and the first annular recessed portion, the joint body can rotate while the buffer sleeve does not rotate.

[0009] Among them, the rotating shaft also has a second annular recessed portion, and the buffer sleeve includes a sleeve body, a circular ring and a shock-absorbing member. The sleeve body is sleeved on the outside of the rotating shaft, and the circular ring is sleeved on the outside of the rotating shaft and is loosely matched with the second annular recessed portion, and the circular ring is fixedly connected to the sleeve body, and the shock-absorbing member is sleeved on the outside of the rotating shaft and is located above the circular ring.

[0010] When the joint body moves upward along the axial line direction of the rotating shaft, the circular ring slides upward on the second annular recess, thereby resisting the shock absorbing member, and the shock absorbing member is used to achieve an impact resistance and shock absorption effect, thereby improving the impact resistance of the screw drill.

[0011] Wherein, the shock absorber includes a second spring and an adapter ring, one end of the second spring is fixedly connected to the circular ring, the other end of the second spring is fixedly connected to the lower end surface of the adapter ring, and the upper end surface of the adapter ring is rotatably connected to the inner top wall of the second annular recess.

[0012] The circular ring slides upward on the second annular recess, thereby abutting against the shock absorbing member, that is, abutting against the second spring. The second spring is compressed after being subjected to force, thereby achieving a shock absorbing effect. The setting of the adapter ring can ensure that the second spring does not rotate with the rotating shaft.

[0013] The impact-resistant screw drill also includes two telescopic rods, which are symmetrically arranged along the axial center line of the rotating shaft, and the two ends of each telescopic rod are fixedly connected to the outer shell and the connecting joint respectively.

[0014] The provision of the telescopic rod can increase the connection stability between the outer shell and the connecting joint.

[0015] Wherein, the telescopic rod includes a sleeve and an inner rod, the inner rod is slidably connected to the sleeve and is located inside the sleeve, one end of the inner rod is fixedly connected to the outer shell, and the sleeve is fixedly connected to the connecting joint.

[0016] The inner rod slides inside the sleeve to achieve the extension and retraction of the telescopic rod.

[0017] According to the impact-resistant screw drill of the present invention, if the drill bit is subjected to impact force or force vibration during drilling, the drill bit is subjected to a resisting force, thereby resisting the connecting joint to move upward along the axial line direction of the rotating shaft, and at this time driving the second wedge block to displace upward. Since the inclined surface of the first wedge block and the inclined surface of the second wedge block are adapted to each other, as the second wedge block moves upward, it resists the first wedge block, driving the slider to move in the sliding groove. At the same time, the first spring is compressed after being subjected to force, thereby achieving a shock-absorbing effect on the vibration force exerted on the drill bit and improving the impact resistance of the screw drill. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of the impact-resistant screw drill tool of the present invention.

[0020] Figure 2 It is a front view of the impact-resistant screw drill tool of the present invention.

[0021] Figure 3 The present invention Figure 2 AA line structural cross-section view.

[0022] Figure 4 The present invention Figure 3 Enlarged view of the local structure at point B.

[0023] Figure 5 The present invention Figure 3 Enlarged view of the local structure at location C.

[0024] Figure 6 The present invention Figure 3 Enlarged view of the local structure at D.

[0025] 1-outer shell, 2-rotating shaft, 3-buffer sleeve, 4-connecting joint, 5-first buffer assembly, 6-mounting hole, 7-side groove, 8-sliding groove, 9-first wedge block, 10-sliding block, 11-second wedge block, 12-first spring, 13-first annular recess, 14-joint body, 15-annular body, 16-second annular recess, 17-sleeve, 18-circular ring, 19-shock absorber, 20-second spring, 21-adapter ring, 22-telescopic rod, 23-sleeve, 24-inner rod, 25-transition hole, 26-disc, 27-outer sleeve, 28-inner sleeve, 29-third spring, 30-fourth spring, 31-reinforcement rib. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limitations of the present invention. In addition, in the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0027] See also Figures 1 to 6 The present invention provides an impact-resistant screw drill, comprising an outer shell 1, a rotating shaft 2, a buffer sleeve 3, a connecting joint 4 and a first buffer assembly 5, wherein the rotating shaft 2 is rotatably mounted inside the outer shell 1, the lower end of the rotating shaft 2 extends out of the outer shell 1, the lower end of the rotating shaft 2 is sleeved with the buffer sleeve 3 and the connecting joint 4, and the lower end of the connecting joint 4 is provided with a mounting hole 6 for mounting a drill bit;

[0028] The outer side wall of the rotating shaft 2 is provided with a side groove 7 and a sliding groove 8 located at the inner bottom of the side groove 7. The first buffer assembly 5 includes a first wedge block 9, a slider 10, a second wedge block 11 and a first spring 12. The slider 10 is slidably arranged in the sliding groove 8. The bottom of the first wedge block 9 is fixedly connected to the slider 10, the second wedge block 11 is fixedly connected to the connecting joint 4, one end of the first spring 12 is fixedly connected to the side wall of the sliding groove 8, the other end of the first spring 12 is fixedly connected to the first wedge block 9, and the inclined surface of the first wedge block 9 and the inclined surface of the second wedge block 11 are adapted to each other.

[0029] In this embodiment, the rotation of the rotating shaft 2 drives the connecting joint 4 to rotate, thereby driving the drill bit to drill and realize drilling. When the drill bit is subjected to impact force or force vibration during the drilling process, the drill bit is subjected to a resisting force, thereby resisting the connecting joint 4 to move upward along the axial line direction of the rotating shaft 2, and at this time driving the second wedge block 11 to move upward. Since the inclined surface of the first wedge block 9 and the inclined surface of the second wedge block 11 are adapted to each other, as the second wedge block 11 moves upward, it resists the first wedge block 9, driving the slider 10 to move in the sliding groove 8. At the same time, the first spring 12 is compressed after being subjected to force, thereby achieving a shock absorbing effect on the vibration force exerted on the drill bit and improving the impact resistance of the screw drill.

[0030] Furthermore, the lower end of the buffer sleeve 3 has a first annular recess 13, the connecting joint 4 includes a joint body 14 and an annular body 15, the joint body 14 is sleeved on the lower end of the rotating shaft 2, the annular body 15 is fixedly connected to the upper end of the joint body 14, and the annular body 15 is clearance-fitted with the first annular recess 13.

[0031] In this embodiment, when the rotating shaft 2 drives the joint body 14 to rotate, it can drive the annular body 15 to rotate in a circle, and through the clearance fit between the annular body 15 and the first annular recess 13, the joint body 14 can rotate while the buffer sleeve 3 does not rotate.

[0032] Furthermore, the rotating shaft 2 also has a second annular recessed portion 16, and the buffer sleeve 3 includes a sleeve body 17, a circular ring 18 and a shock absorbing member 19. The sleeve body 17 is sleeved on the outside of the rotating shaft 2, and the circular ring 18 is sleeved on the outside of the rotating shaft 2 and is loosely matched with the second annular recessed portion 16, and the circular ring 18 is fixedly connected to the sleeve body 17, and the shock absorbing member 19 is sleeved on the outside of the rotating shaft 2 and is located above the circular ring 18. The shock absorbing member 19 includes a second spring 20 and an adapter ring 21, one end of the second spring 20 is fixedly connected to the circular ring 18, the other end of the second spring 20 is fixedly connected to the lower end surface of the adapter ring 21, and the upper end surface of the adapter ring 21 is rotatably connected to the inner top wall of the second annular recessed portion 16.

[0033] In this embodiment, when the joint body 14 moves upward along the axial line direction of the rotating shaft 2, the circular ring 18 slides upward on the second annular recess 16, and then abuts against the shock absorbing member 19, that is, the second spring 20. The second spring 20 is compressed after being stressed, so as to achieve a shock absorbing effect. The setting of the adapter ring 21 can achieve that the second spring 20 does not rotate with the rotating shaft 2. Therefore, the shock absorbing member 19 is used to achieve an anti-impact shock absorbing effect, thereby improving the impact resistance of the screw drill.

[0034] Further, the impact-resistant screw drill tool also includes two telescopic rods 22, which are symmetrically arranged along the axial center line of the rotating shaft 2, and the two ends of each telescopic rod 22 are respectively fixedly connected to the outer shell 1 and the connecting joint 4. The telescopic rod 22 includes a sleeve 23 and an inner rod 24, the inner rod 24 is slidably connected to the sleeve 23 and is located inside the sleeve 23, and one end of the inner rod 24 is fixedly connected to the outer shell 1, and the sleeve 23 is fixedly connected to the connecting joint 4.

[0035] In this embodiment, the inner rod 24 slides inside the sleeve 23 to achieve the extension and retraction of the telescopic rod 22 . The provision of the telescopic rod 22 can increase the connection stability between the outer shell 1 and the connecting joint 4 .

[0036] Further, the connecting joint 4 also has a transition hole 25, in which a second buffer assembly is arranged, and the second buffer assembly includes a disc 26, an outer sleeve 27, an inner sleeve 28 and a third spring 29, wherein the disc 26 is rotatably connected to the rotating shaft 2, one end of the inner sleeve 28 is fixedly connected to the disc 26, the other end of the inner sleeve 28 is slidably connected to one end of the outer sleeve 27, and the outer sleeve 27 is sleeved on the outside of the inner sleeve 28, the other end of the outer sleeve 27 is fixedly connected to the inner bottom of the transition hole 25, and the third spring 29 is arranged inside the outer sleeve 27. The second buffer assembly also includes a fourth spring 30, the two ends of which are respectively fixedly connected to the disc 26 and the inner bottom of the transition hole 25, and sleeved on the outside of the outer sleeve 27 and the inner sleeve 28.

[0037] In this embodiment, when the drill bit is subjected to impact force or force vibration during the drilling process, the drill bit is subjected to a resisting force, and the outer part of the inner sleeve 28 is contracted to the inside of the outer sleeve 27 to resist the third spring 29. At this time, the third spring 29 is compressed after being subjected to force, thereby achieving a shock absorbing effect and improving the impact resistance of the screw drill. While the outer part of the inner sleeve 28 is contracted to the inside of the outer sleeve 27, the fourth spring 30 is also compressed after being subjected to force, further improving the impact resistance of the screw drill.

[0038] Furthermore, the impact-resistant screw drill tool further includes a plurality of reinforcing ribs 31 , and the plurality of reinforcing ribs 31 are all fixedly connected to the outer shell 1 and are evenly distributed outside the outer shell 1 .

[0039] In this embodiment, the provision of a plurality of reinforcing ribs 31 can increase the structural strength of the outer shell 1 .

[0040] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. An impact-resistant screw drill, It is characterized in that The utility model comprises an outer shell, a rotating shaft, a buffer sleeve, a connecting joint and a first buffer assembly, wherein the rotating shaft is rotatably mounted inside the outer shell, the lower end of the rotating shaft extends out of the outer shell, the buffer sleeve and the connecting joint are sleeved on the lower end of the rotating shaft, and the lower end of the connecting joint is provided with a mounting hole for mounting a drill bit; The outer side wall of the rotating shaft is provided with a side groove and a sliding groove located at the inner bottom of the side groove, the first buffer assembly comprises a first wedge block, a slider, a second wedge block and a first spring, the slider is slidably arranged in the sliding groove, the bottom of the first wedge block is fixedly connected to the slider, the second wedge block is fixedly connected to the connecting joint, one end of the first spring is fixedly connected to the side wall of the sliding groove, the other end of the first spring is fixedly connected to the first wedge block, and the inclined surface of the first wedge block and the inclined surface of the second wedge block are adapted to each other; The lower end of the buffer sleeve has a first annular recessed portion, the connecting joint comprises a joint body and an annular body, the joint body is sleeved on the lower end of the rotating shaft, the annular body is fixedly connected to the upper end of the joint body, and the annular body is clearance-matched with the first annular recessed portion; The rotating shaft also has a second annular recessed portion, and the buffer sleeve includes a sleeve body, a circular ring and a shock absorbing member, wherein the sleeve body is sleeved on the outside of the rotating shaft, the circular ring is sleeved on the outside of the rotating shaft and is loosely matched with the second annular recessed portion, and the circular ring is fixedly connected to the sleeve body, and the shock absorbing member is sleeved on the outside of the rotating shaft and is located above the circular ring; The shock absorber includes a second spring and an adapter ring, one end of the second spring is fixedly connected to the circular ring, the other end of the second spring is fixedly connected to the lower end surface of the adapter ring, and the upper end surface of the adapter ring is rotatably connected to the inner top wall of the second annular recess.

2. The impact-resistant screw drill according to claim 1, It is characterized in that The impact-resistant screw drill also includes two telescopic rods, which are symmetrically arranged along the axial center line of the rotating shaft, and the two ends of each telescopic rod are fixedly connected to the outer shell and the connecting joint respectively.

3. The impact-resistant screw drill according to claim 2, It is characterized in that The telescopic rod comprises a sleeve and an inner rod, wherein the inner rod is slidably connected to the sleeve and is located inside the sleeve, and one end of the inner rod is fixedly connected to the outer shell, and the sleeve is fixedly connected to the connecting joint.

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