Mechanical vibration drilling chip breaker

Abstract

This utility model discloses a mechanical vibration-type drilling chip-breaking device, including a connecting handle, a mounting base, a bearing housing, a vibrating drill sleeve, and a vibration mechanism. The vibration mechanism includes an upper ring, a retainer, and a lower ring arranged sequentially from top to bottom. The upper ring is in close contact with the corresponding hole wall of the vertical through hole of the bearing housing, and the lower ring is in close contact with the upper outer wall of the vibrating drill sleeve. The upper surface of the lower ring has multiple wavy surfaces that are connected end to end along the circumference and gradually change in vertical height. Multiple rollers are mounted on the retainer. The upper parts of the rollers are in close contact with the lower plane of the upper ring and can roll, and the lower parts are in close contact with the multiple wavy surfaces and can roll. This utility model can achieve the function of vibration chip breaking. The drilling speed is slower and the withdrawal speed is faster in each axial vibration, which reduces the impact on the entire device and drill bit, better protects the drill rod, drill bit, and connecting structure, increases the service life of the drill bit, reduces noise, and is environmentally friendly.

Description

Technical Field

[0001] This utility model relates to a drilling chip breaking device, and more particularly to a mechanical vibration type drilling chip breaking device. Background Technology

[0002] In machining processes, there are continuous machining operations, such as turning and drilling. For non-ferrous metals (e.g., copper, aluminum) and ferrous metals (e.g., steel, cast iron), it is generally required that the chips produced during cutting not become long chips, but rather short chips that are easy to remove and clean and do not entangle with the cutting tool. Otherwise, it can easily affect the quality of the workpiece, damage the cutting tool, and manually cleaning entangled chips will also reduce machining efficiency. In most cases, for materials that are easy to break chips (e.g., high and medium carbon steel, alloy steel, copper-aluminum alloys, cast iron, etc.), the cutting tool (for turning) or the drill bit (for drilling) can be reasonably equipped with chip breaking grooves, and appropriate cutting parameters can be selected during machining to solve the chip breaking problem. However, in some cases, such as machining low carbon steel, low carbon alloy steel, pure aluminum, pure titanium, and other difficult-to-machine materials, it is difficult to solve the chip breaking problem using the above methods.

[0003] To address the problem that even with chip breaker grooves on the drill bit, reliable chip breaking is still difficult to achieve, vibrating the drill bit during drilling to achieve vibration chip breaking is an effective solution. There are many vibration chip breaking methods, such as ultrasonic vibration chip breaking, electromagnetic vibration chip breaking, and mechanical vibration chip breaking. Among them, mechanical vibration chip breaking utilizes the drilling power of the drill bit and a mechanical vibration structure to achieve vibration chip breaking. Compared with ultrasonic vibration chip breaking and electromagnetic vibration chip breaking, it has the advantages of not requiring additional power sources, reducing space occupation, and lowering production costs.

[0004] Vibratory drilling chip breakers use a vibration mechanism to generate axial vibration during rotational motion, thereby achieving chip breaking. However, this traditional device has the following drawbacks: the drilling and withdrawal processes are extremely fast and at the same speed during each axial vibration, resulting in a significant impact on the entire device and drilling tool. This may damage the drill rod, drill bit, or connecting structure, and it can also accelerate the wear of the cutting edge on the drill bit, reducing its service life. Furthermore, the strong impact during rapid drilling leads to significant noise, which is detrimental to environmental protection. Utility Model Content

[0005] The purpose of this invention is to provide a mechanical vibration-type chip-breaking device that allows for smoother drilling during axial vibration, in order to solve the above-mentioned problems.

[0006] This utility model achieves the above objectives through the following technical solutions: A mechanical vibration-type drilling chip-breaking device includes a connecting shank, a mounting base, a bearing housing, a vibrating drill sleeve, and a vibration mechanism. The connecting shank has a central through hole with its axial direction perpendicular to the central through hole. The lower section of the connecting shank has a reduced outer circumferential diameter, forming a lower shank connecting section. The lower end of the lower shank connecting section is connected to the upper end of the vibrating drill sleeve, and the vibrating drill sleeve cannot rotate relative to the lower shank connecting section but can move vertically with a small distance relative to it. The lower section of the vibrating drill sleeve has a drill bit connecting hole for connecting a drill bit. The bearing housing is fitted onto the lower shank connecting section through its vertical through hole. The inner wall of the bearing is connected to the outer circumferential wall of the lower shank connecting section, and the outer wall is connected to the wall of the vertical through hole of the bearing housing. The mounting base is connected to the outer wall of the bearing housing. The vibration mechanism is installed between the lower part of the bearing housing and the upper part of the vibratory drill sleeve. The vibration mechanism includes an upper ring, a cage, and a lower ring arranged sequentially from top to bottom. The outer circumferential wall of the annular upper ring is in close contact with the corresponding wall of the vertical through hole of the bearing housing. A gap is left between the inner circumference of the ring and the upper outer wall of the vibratory drill sleeve. Gaps are also left between the outer circumference of the annular retainer and the corresponding hole wall of the vertical through hole of the bearing seat, and between the inner circumference of the retainer and the upper outer wall of the vibratory drill sleeve. The inner circumference of the lower ring is in close contact with the upper outer wall of the vibratory drill sleeve. A gap is left between the outer circumference of the lower ring and the corresponding hole wall of the vertical through hole of the bearing seat. The upper surface of the lower ring has multiple rings that are sequentially connected end-to-end along the circumferential direction and vertically... The wavy surface gradually changes in height, with each wavy surface having two highest points and a lowest point between the two highest points, the distance between the lowest point and the two highest points being different. The cage is equipped with a plurality of rollers, the same number as the wavy surface, evenly distributed along the circumference and capable of rolling freely around the circumference. The upper parts of the plurality of rollers are in close contact with the lower plane of the upper ring and are capable of rolling, and the lower parts are in close contact with the plurality of wavy surfaces on the lower ring and are capable of rolling. The aforementioned vibration mechanism is an improvement on traditional roller bearings. Its main improvement lies in designing multiple wavy surfaces on the upper surface of the lower ring, each corresponding to one of the rollers. The aforementioned micro-distance movement refers to a small vertical movement distance, generally between 0.02-0.6 mm, depending on the specific requirements. Furthermore, to achieve a more reliable anti-rotation function, multiple pins are evenly distributed along the circumferential direction between the inner circumference of the lower ring and the upper outer wall of the vibratory drill sleeve. The length direction of the pins can be axial, in which case each pin is simultaneously located in a groove on both the inner circumference of the lower ring and the upper outer wall of the vibratory drill sleeve. Alternatively, the length direction of the pins can be radial, in which case each pin passes through a corresponding through hole on the lower ring and is simultaneously placed in a corresponding blind hole of the vibratory drill sleeve.

[0007] Preferably, in order to achieve the function of slow drilling and fast withdrawal in each vibration cycle to better protect the drill bit, during the rotation of the vibratory drill sleeve, each roller rolls from the first highest position to the second highest position of the corresponding wavy surface, and the distance between the lowest position of each wavy surface and the first highest position is less than the distance between the lowest position and the second highest position.

[0008] Preferably, in order to better achieve the function of slow drilling and rapid withdrawal in each vibration cycle, the distance between the lowest position of each wave-shaped surface and the first highest position is one-quarter to one-half the distance between the lowest position and the second highest position.

[0009] Preferably, in order to install the vibration mechanism more reliably, the outer diameter of the upper outer wall of the vibratory drill sleeve is reduced to form a vibration connection section. The vibration mechanism is located between the outer wall of the vibration connection section and the corresponding hole wall of the vertical through hole of the bearing seat. The lower part of the vibration connection section forms a support step with an "L" shaped cross section, and the lower ring is located within the support step.

[0010] Preferably, to facilitate reliable connection between the lower shank connecting section and the vibratory drill sleeve and to achieve the function that the vibratory drill sleeve cannot rotate relative to the lower shank connecting section but can move vertically with a small distance relative to the lower shank connecting section, the vibratory connecting section is provided with a screw mounting through hole communicating with the drill bit connecting hole. The outer diameter of the upper section of the vibratory connecting section is reduced to form a positioning section, and the screw mounting through hole penetrates the positioning section. The positioning section is placed in the central through hole of the shank and is in close contact with its hole wall and corresponds to the lower shank connecting section. The central through hole of the shank is provided with a threaded hole with a reduced diameter above the positioning section, and the stud of the first connecting screw passes through the screw mounting through hole. The screw mounting through hole is connected to the threaded hole. The lower diameter of the screw mounting through hole is increased to form a countersunk hole, and the nut of the first connecting screw is placed in the countersunk hole. The middle and lower section of the screw mounting through hole is increased to form a compression spring mounting through hole. The vertical compression spring is fitted outside the stud of the first connecting screw and is located in the compression spring mounting through hole. The lower end of the compression spring contacts the upper end of the nut of the first connecting screw. The lower diameter of the shank center through hole is increased to form a rotary transmission hole. The position of the outer circumference of the vibration connecting section below the positioning section is located in the rotary transmission hole and forms a gear meshing connection structure with the hole wall of the rotary transmission hole.

[0011] Preferably, in order to facilitate the entry of cooling water from the central through hole of the shank into the drill bit connection hole and the drill bit, the first connecting screw is provided with a vertically penetrating central water hole, the upper end of which communicates with the central through hole of the shank and the lower end of which communicates with the drill bit connection hole.

[0012] Preferably, to facilitate assembly and adjustment of the rotational clearance (i.e., rotational accuracy) of the two connecting bearings, the bearing housing includes an upper bearing housing and a lower bearing housing. The upper bearing housing is located above the lower bearing housing and is connected to the lower bearing housing by multiple second connecting screws. The upper bearing housing is fitted onto the lower shank connecting section through its own vertical through hole. The inner walls of the two vertically arranged connecting bearings are respectively connected to the outer circumferential wall of the lower shank connecting section, and the outer walls are respectively connected to the wall of the vertical through hole of the upper bearing housing. An adjusting washer is installed between the two connecting bearings. The mounting base is connected to the outer wall of the upper bearing housing. The vibration mechanism is installed between the lower middle part of the lower bearing housing and the upper part of the vibratory drill sleeve. The upper diameter of the lower bearing housing is enlarged to form a nut mounting hole. The lower end of the lower shank connecting section has an external thread, and a locking nut is fitted onto the external thread. A backstop washer and a locking washer are sequentially fitted on the lower shank connecting section above the locking nut, and the upper surface of the locking washer is in close contact with the lower surface of the lower connecting bearing.

[0013] Preferably, in order to prevent cutting fluid from penetrating into the connecting bearing, sealing rings are installed between the upper inner wall of the upper bearing housing and the upper outer wall of the lower shank connecting section, and between the lower inner wall of the lower bearing housing and the corresponding outer wall of the vibratory drill sleeve.

[0014] Preferably, in order to ensure that the chip breaking function can be achieved when the drill bit is at its maximum feed, the vertical distance between the highest and lowest positions of the wavy surface is greater than the maximum feed of the drill bit.

[0015] Preferably, in order to ensure the reliability of the vibration mechanism and ensure that the vibration chip breaking function can be achieved at all times during long-term drilling, the number of the wavy surfaces is at least 3 and the number of the cutting edges of the drill bit is odd and even, respectively.

[0016] The beneficial effects of this utility model are as follows: This invention utilizes a vibration mechanism consisting of an upper ring, a cage, and a lower ring installed between a bearing housing and a vibratory drill sleeve. The upper ring is fixed on the bearing housing, while the lower ring is rotatable on the vibratory drill sleeve. Multiple corrugated surfaces are formed on the upper part of the lower ring, and multiple rollers are mounted on the cage, each positioned on one of these corrugated surfaces. As the connecting shank drives the vibratory drill sleeve to rotate, the rollers roll on these corrugated surfaces, creating a circumferentially rotating and axially vibrating working state for the vibratory drill sleeve and the drill bit mounted on it. This allows for timely chip cutting through the close contact between the drill bit and the bottom of the hole during drilling, achieving a vibratory chip-breaking function. By designing different distances between the lowest and two highest points of the corrugated surfaces, the drilling speed is slower and the withdrawal speed is faster during each axial vibration, reducing the impact on the entire device and the drill bit. This better protects the drill rod, drill bit, and connecting structure, slows down the wear rate of the drill bit's cutting edge, increases the drill bit's service life, reduces noise, and is environmentally friendly. Attached Figure Description

[0017] Figure 1 This is a front sectional view of the mechanical vibration drilling chip breaking device described in this utility model; Figure 2 This is a front view of the vibration mechanism of the mechanical vibration type drilling chip breaking device described in this utility model. The scale of the figure is larger than [missing information]. Figure 1 ; Figure 3 This is a bottom view and a top view of the retainer and rollers of the vibration mechanism of the mechanical vibration type drilling chip breaking device described in this utility model; Figure 4 This is a top perspective view of the lower ring of the vibration mechanism of the mechanical vibration type drilling chip breaking device described in this utility model; Figure 5 This is a schematic diagram of the main view structure of the upper surface of the lower ring of the vibration mechanism of the mechanical vibration type drilling chip breaking device of this utility model after unfolding the part corresponding to a certain concentric circle. Figure 6 This is a cross-sectional view of the connection between the lower shank connecting section and the vibration connecting section of the mechanical vibration drilling chip breaking device of this utility model. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings: like Figures 1-6As shown, the mechanical vibration drilling chip-breaking device of this utility model includes a connecting shank 1, a mounting base 3, a bearing seat (refer to the upper bearing seat 9 and lower bearing seat 15 below), a vibrating drill sleeve 19, and a vibration mechanism 16. The connecting shank 1 has a central through hole 2 with the axial direction of the central through hole 2 as the vertical direction. The lower section of the connecting shank 1 has a reduced circumferential outer diameter to form a lower shank connecting section 7. The lower end of the lower shank connecting section 7 is connected to the upper end of the vibrating drill sleeve 19, and the vibrating drill sleeve 19 cannot rotate relative to the lower shank connecting section 7 but can move vertically with a small distance relative to the lower shank connecting section 7. The lower section of the vibrating drill sleeve 19 has a drill bit connecting hole 20 for connecting a drill bit (not shown in the figure). The bearing housing is fitted onto the lower shank connecting section 7 through its vertical through hole. The inner wall of the connecting bearing 8 (a tapered roller bearing in the figure) is connected to the outer circumferential wall of the lower shank connecting section 7, and the outer wall is connected to the wall of the vertical through hole of the bearing housing. The mounting base 3 is connected to the outer wall of the bearing housing. The vibration mechanism 16 is installed between the lower part of the bearing housing and the upper part of the vibratory drill sleeve 19. The vibration mechanism 16 includes an upper ring 161, a cage 162, and a lower ring 163 arranged sequentially from top to bottom. The outer circumferential wall of the annular upper ring 161 is in close contact with the corresponding hole wall of the vertical through hole of the bearing housing, and the inner circumferential wall of the upper ring 161 is in close contact with the upper outer wall of the vibratory drill sleeve 19. Gaps are left between the walls. Gaps are left between the outer circumference of the annular retainer 162 and the corresponding hole wall of the vertical through hole of the bearing seat, and between the inner circumference of the retainer 162 and the upper outer wall of the vibratory drill sleeve 19. The inner circumference of the lower annular ring 163 is in close contact with the upper outer wall of the vibratory drill sleeve 19. Gaps are left between the outer circumference of the lower ring 163 and the corresponding hole wall of the vertical through hole of the bearing seat. The upper surface of the lower ring 163 is provided with multiple (five in the figure) wavy surfaces 165 that are connected end to end along the circumferential direction and whose vertical height gradually changes. The two ends of each wavy surface 165 are the highest positions 167 (which are a line segment and Its extension line passes through the center line of the lower ring 163) and there is a lowest position 166 between the two highest positions 167 (which is a line segment and its extension line passes through the center line of the lower ring 163) and the distance between the lowest position 166 and the two highest positions 167 is different. The cage 162 is equipped with multiple (five in the figure) rollers 164, which are the same number as the wavy surface 165 and are evenly distributed along the circumference and can roll freely around the circumference. The upper part of the multiple rollers 164 is in close contact with the lower plane of the upper ring 161 and can roll, and the lower part is in close contact with the multiple wavy surfaces 165 on the lower ring 163 and can roll.To achieve a more reliable anti-rotation function, a plurality of pins (not shown in the figure) are provided between the inner circumferential wall of the lower ring 163 and the upper outer wall of the vibratory drill sleeve 19. The length direction of the pins can be axial, in which case each pin is simultaneously located in the groove on the inner circumferential wall of the lower ring 163 and the groove on the upper outer wall of the vibratory drill sleeve 19. Alternatively, the length direction of the pins can be radial, in which case each pin passes through the corresponding through hole on the lower ring 163 and is simultaneously placed in the corresponding blind hole of the vibratory drill sleeve 19.

[0019] like Figures 1-6 As shown, this utility model also discloses the following more optimized specific structures: In order to achieve the function of slow drilling and fast withdrawal in each vibration cycle to better protect the drill bit, during the rotation of the vibrating drill sleeve 19, each roller 164 is arranged to roll from the first highest position 167 to the second highest position 167 of the corresponding wavy surface 165, and the distance between the lowest position 166 of each wavy surface 165 and the first highest position 167 is smaller than the distance between the lowest position 166 and the second highest position 167.

[0020] To better achieve the function of slow drilling and rapid withdrawal in each vibration cycle, the distance between the lowest position 166 and the first highest position 167 of each wavy surface 165 is one-quarter to one-half of the distance between the lowest position 166 and the second highest position 167 (approximately one-third in the figure).

[0021] To more reliably install the vibration mechanism 16, the outer diameter of the upper outer wall of the vibration drill sleeve 19 is reduced to form a vibration connection section 14. The vibration mechanism 16 is located between the outer wall of the vibration connection section 14 and the corresponding hole wall of the vertical through hole of the bearing seat. The lower part of the vibration connection section 14 forms a support step with an "L" shaped cross section, and the lower ring 163 is located within the support step.

[0022] To facilitate a reliable connection between the lower shank connecting section 7 and the vibratory drill sleeve 19, and to enable the vibratory drill sleeve 19 to not rotate relative to the lower shank connecting section 7 but to move vertically with a small distance relative to it, the vibratory connecting section 14 is provided with a screw mounting through hole (not marked in the figure) communicating with the drill bit connecting hole 20. The outer diameter of the upper section of the vibratory connecting section 14 is reduced to form a positioning section 11, and the screw mounting through hole penetrates the positioning section 11. The positioning section 11 is placed in the lower section of the shank center through hole 2 and is in close contact with its hole wall and corresponds to the lower shank connecting section 7. A threaded hole with a reduced diameter is provided in the shank center through hole 2 above the positioning section 11, and the stud 5 of the first connecting screw 18 passes through the screw mounting through hole and connects to the threaded hole. The lower diameter is increased to form a countersunk hole (not marked in the figure), and the nut of the first connecting screw 18 is placed in this countersunk hole. The lower section of the screw mounting through hole is increased to form a compression spring mounting through hole 22. The vertical compression spring 12 is fitted outside the stud 5 of the first connecting screw 18 and is located in the compression spring mounting through hole 22. The lower end of the compression spring 12 contacts the upper end of the nut of the first connecting screw 18. The lower diameter of the shank center through hole 2 is increased to form a rotary transmission hole (not marked in the figure). The position of the outer circumference of the vibration connecting section 14 below the positioning section 11 is located in the rotary transmission hole and forms a gear meshing connection structure with the hole wall of the rotary transmission hole. The figure shows an arc-shaped gear meshing connection structure, but it can also be a triangular tooth, square tooth, or other gear meshing connection structure.

[0023] To facilitate the entry of cooling water from the shank center through hole 2 into the drill bit connection hole 20 and the drill bit, the first connecting screw 18 is provided with a vertically penetrating center water hole 4, the upper end of which is connected to the shank center through hole 2 and the lower end of which is connected to the drill bit connection hole 20.

[0024] To facilitate assembly and adjustment of the rotational clearance (i.e., rotational accuracy) of the two connecting bearings 8, the bearing housing includes an upper bearing housing 9 and a lower bearing housing 15. The upper bearing housing 9 is located above the lower bearing housing 15 and is connected to the lower bearing housing 15 by multiple second connecting screws 17. The upper bearing housing 9 is fitted onto the lower shank connecting section 7 through its own vertical through hole. The inner walls of the two vertically arranged connecting bearings 8 are respectively connected to the outer circumferential wall of the lower shank connecting section 7, and their outer walls are respectively connected to the wall of the vertical through hole of the upper bearing housing 9. An adjusting washer 10 is installed between the two connecting bearings 8. Mounting base 3 is connected to the outer wall of upper bearing housing 9. Vibration mechanism 16 is installed between the lower middle part of lower bearing housing 15 and the upper part of vibratory drill sleeve 19. The upper hole diameter of lower bearing housing 15 is enlarged to form a nut mounting hole (not marked in the figure). The lower end of the lower shank connecting section 7 is provided with external thread and locking nut 13 is fitted on the external thread. A backstop washer (not marked in the figure) and a locking washer (not marked in the figure) are sequentially fitted on the lower shank connecting section 7 above the locking nut 13, and the upper part of the locking washer is in close contact with the lower part of the connecting bearing 8.

[0025] To prevent cutting fluid from seeping into the connecting bearing 8, sealing rings 6 are installed between the upper inner wall of the upper bearing seat 9 and the upper outer wall of the lower shank connecting section 7, and between the lower inner wall of the lower bearing seat 15 and the corresponding outer wall of the vibratory drill sleeve 19.

[0026] To ensure that the chip breaking function can be achieved at the maximum feed of the drill bit, the vertical distance K between the highest position 167 and the lowest position 166 of the wavy surface 165 is greater than the maximum feed of the drill bit.

[0027] To ensure the operational reliability of the vibration mechanism 16 and to ensure that the chip breaking function can be achieved during long-term drilling, the number of the wavy surfaces 165 is at least 3 (five in the figure) and is either odd or even with the number of cutting edges of the drill bit (i.e., if the number of cutting edges of the drill bit is even, the number of wavy surfaces 165 is odd, and if the number of cutting edges of the drill bit is odd, the number of wavy surfaces 165 is even).

[0028] Figure 1 The image also shows a locking screw hole 21 located on the hole wall of the drill bit connection hole 20, which is a conventional adaptive structure.

[0029] like Figures 1-6As shown, in application, the mechanical vibration drilling chip-breaking device of this utility model is fixed on a machine tool (not shown in the figure) via the mounting base 3. The lower end of the drill rod (not shown in the figure), which is mounted on the machine tool and can rotate at high speed, is connected to the upper end of the connecting handle 1. The drill bit (not shown in the figure) is installed in the drill bit connecting hole 20 of the vibrating drill sleeve 19. The workpiece is installed on the machine tool and located below the drill bit. The machine tool is started, and the drill rod rotates at high speed (driven by the machine tool spindle) and maintains a downward feed force, driving the vibrating drill sleeve 19 and the drill bit to rotate at high speed, realizing the drilling function on the workpiece. During the rotation of the vibrating drill sleeve 19, the lower ring 163 rotates synchronously, and the five rollers 164 rotate and move relative to each other on the five wavy surfaces 165 respectively. During one rotation of the vibrating drill sleeve 19, each wavy surface 165 contacts the five rollers 164 in turn. Similarly, each roller 164 contacts the five wavy surfaces 165 in turn. With 65 contact points, a total of five axial vibration cycles are formed. When the roller 164 moves from the lowest position 166 to the highest position 167 of the wavy surface 165, the squeezing force generated by the roller 164 during rolling overcomes the elastic force of the compression spring 12 and the drilling force, causing the vibratory drill sleeve 19 and the drill bit to move downward, forming the drilling working state. When the roller 164 moves from the highest position 167 to the lowest position 166 of the wavy surface 165, the combined action of the elastic force of the compression spring 12 and the drilling force causes the vibratory drill sleeve 19 and the drill bit to move upward, forming the exit working state. The time and circumferential movement distance of the drilling working state are greater than the time and circumferential movement distance of the exit working state, forming a high-frequency vibration drilling process of slow drilling and fast exit. In the final stage of each drilling working state, the lower end of the drill bit is in close contact with the bottom of the hole in the workpiece, cutting off the chips and forming several very short chips, achieving the purpose of vibration chip breaking and avoiding long chips from wrapping around the drill bit.

[0030] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the technical solutions of this utility model. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of this utility model patent.

Claims

1. A mechanical vibration-type drilling chip-breaking device, comprising a connecting shank, a mounting base, a bearing housing, a vibrating drill sleeve, and a vibration mechanism, wherein the connecting shank has a central through hole and the axial direction of the central through hole is vertical; the lower section of the connecting shank has a reduced circumferential outer diameter to form a lower shank connecting section; the lower end of the lower shank connecting section is connected to the upper end of the vibrating drill sleeve, and the vibrating drill sleeve cannot rotate relative to the lower shank connecting section but can move vertically with a small distance relative to the lower shank connecting section; the lower section of the vibrating drill sleeve has a drill bit connecting hole for connecting a drill bit; the bearing housing is fitted onto the lower shank connecting section through its own vertical through hole; the inner wall of the connecting bearing is connected to the outer circumferential wall of the lower shank connecting section, and the outer wall is connected to the wall of the vertical through hole of the bearing housing; the mounting base is connected to the outer wall of the bearing housing; and the vibration mechanism is installed between the lower part of the bearing housing and the upper part of the vibrating drill sleeve, characterized in that: The vibration mechanism includes an upper ring, a cage, and a lower ring arranged sequentially from top to bottom. The outer circumference of the annular upper ring is in close contact with the corresponding hole wall of the vertical through hole of the bearing seat. A gap is left between the inner circumference of the upper ring and the upper outer wall of the vibratory drill sleeve. Gaps are left between the outer circumference of the annular cage and the corresponding hole wall of the vertical through hole of the bearing seat, and between the inner circumference of the cage and the upper outer wall of the vibratory drill sleeve. The inner circumference of the annular lower ring is in close contact with the upper outer wall of the vibratory drill sleeve, and the outer circumference of the lower ring is in close contact with the corresponding hole wall of the vertical through hole of the bearing seat. There is a gap between them. The upper surface of the lower ring is provided with a plurality of wavy surfaces that are connected end to end along the circumference and whose vertical height gradually changes. The two ends of each wavy surface are the highest positions, and there is a lowest position between the two highest positions. The distance between the lowest position and the two highest positions is different. The cage is equipped with a plurality of rollers that are the same number as the wavy surfaces, are evenly distributed along the circumference, and can roll freely around the circumference. The upper parts of the plurality of rollers are in close contact with the lower plane of the upper ring and can roll, and the lower parts are in close contact with the plurality of wavy surfaces on the lower ring and can roll.

2. The mechanical vibration type drilling chip breaking device according to claim 1, characterized in that: During the rotation of the vibratory drill sleeve, each roller rolls from the first highest position to the second highest position on the corresponding wavy surface, and the distance between the lowest position of each wavy surface and the first highest position is less than the distance between the lowest position and the second highest position.

3. The mechanical vibration type drilling chip breaking device according to claim 2, characterized in that: The distance between the lowest position of each of the wavy surfaces and the first highest position is one-quarter to one-half the distance between the lowest position and the second highest position.

4. The mechanical vibration type drilling chip breaking device according to claim 1, characterized in that: The outer diameter of the upper outer wall of the vibratory drill sleeve is reduced to form a vibratory connecting section. The vibratory mechanism is located between the outer wall of the vibratory connecting section and the corresponding hole wall of the vertical through hole of the bearing seat. The lower part of the vibratory connecting section forms a support step with an "L" shaped cross section, and the lower ring is located within the support step.

5. The mechanical vibration type drilling chip breaking device according to claim 4, characterized in that: The vibrating connecting section has a screw mounting through hole communicating with the drill bit connecting hole. The outer diameter of the upper section of the vibrating connecting section decreases to form a positioning section, and the screw mounting through hole penetrates the positioning section. The positioning section is placed in the central through hole of the shank and is in close contact with its hole wall, corresponding to the lower shank connecting section. A threaded hole with a reduced diameter is provided in the central through hole of the shank above the positioning section, and the stud of the first connecting screw passes through the screw mounting through hole and connects to this threaded hole. The lower diameter of the screw mounting through hole increases to form a countersunk hole. The nut of the first connecting screw is placed in the countersunk hole. The lower section of the screw mounting through hole is enlarged to form a compression spring mounting through hole. The vertical compression spring is fitted outside the stud of the first connecting screw and is located in the compression spring mounting through hole. The lower end of the compression spring contacts the upper end of the nut of the first connecting screw. The lower part of the shank center through hole is enlarged to form a rotary transmission hole. The position of the outer circumference of the vibration connecting section below the positioning section is located in the rotary transmission hole and forms a gear meshing connection structure with the hole wall of the rotary transmission hole.

6. The mechanical vibration type drilling chip breaking device according to claim 5, characterized in that: The first connecting screw has a vertically penetrating central water hole, the upper end of which is connected to the central through hole of the shank and the lower end of which is connected to the drill bit connecting hole.

7. The mechanical vibration type drilling chip breaking device according to any one of claims 1-6, characterized in that: The bearing housing includes an upper bearing housing and a lower bearing housing. The upper bearing housing is located above the lower bearing housing and is connected to the lower bearing housing by a plurality of second connecting screws. The upper bearing housing is fitted onto the lower shank connecting section through its own vertical through hole. The inner walls of the two vertically arranged connecting bearings are respectively connected to the outer circumferential wall of the lower shank connecting section, and the outer walls are respectively connected to the wall of the vertical through hole of the upper bearing housing. An adjusting washer is installed between the two connecting bearings. The mounting seat is connected to the outer wall of the upper bearing housing. The vibration mechanism is installed between the lower middle part of the lower bearing housing and the upper part of the vibratory drill sleeve. The upper hole diameter of the lower bearing housing is enlarged to form a nut mounting hole. The lower end of the lower shank connecting section has an external thread, and a locking nut is fitted on the external thread. A backstop washer and a locking washer are sequentially fitted on the lower shank connecting section above the locking nut, and the upper surface of the locking washer is in close contact with the lower surface of the lower connecting bearing.

8. The mechanical vibration type drilling chip breaking device according to claim 7, characterized in that: Sealing rings are installed between the upper inner wall of the upper bearing seat and the upper outer wall of the lower shank connecting section, and between the lower inner wall of the lower bearing seat and the corresponding outer wall of the vibratory drill sleeve.

9. The mechanical vibration type drilling chip breaking device according to any one of claims 1-6, characterized in that: The vertical distance between the highest and lowest positions of the wavy surface is greater than the maximum feed rate of the drill bit.

10. The mechanical vibration type drilling chip breaking device according to any one of claims 1-6, characterized in that: The number of the wavy surfaces is at least three, and the number of the cutting edges of the drill bit is either odd or even.

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