CN210548265U - Cam mechanism type axial vibration drilling device - Google Patents
Cam mechanism type axial vibration drilling device Download PDFInfo
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- CN210548265U CN210548265U CN201921662205.0U CN201921662205U CN210548265U CN 210548265 U CN210548265 U CN 210548265U CN 201921662205 U CN201921662205 U CN 201921662205U CN 210548265 U CN210548265 U CN 210548265U
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Abstract
The utility model relates to a cam mechanism type axial vibration drilling device, which comprises a servo motor, a motor support, an upper cam, a rolling spline shaft, a rolling spline pair, a main shaft support, a lower cam, a spring end cover, a spring and a spring baffle plate; the servo motor is connected with one end of the rolling spline shaft; one end of the motor support is fixedly connected with the rear end of the main shaft bracket through a bolt, and the other end of the motor support is fixedly connected with the servo motor; the rolling spline shaft penetrates through an end cover of the motor support, a main shaft support is arranged on the outer side of the rolling spline shaft, a pair of rolling bearings are arranged at two ends between the main shaft support and the rolling spline shaft, and the pair of rolling bearings are arranged at two ends of the main shaft support respectively; the front end of the main shaft bracket is coaxially fixed on the rolling spline shaft through a bolt and a lower cam; and a rolling spline pair is arranged on the outer side of the spline part of the rolling spline shaft, and the rear end of the rolling spline pair is fixedly connected with the upper cam through a bolt. The device can transmit larger torque while moving in the axial direction, and improves the drilling efficiency.
Description
Technical Field
The utility model relates to a mechanical vibration field specifically is a cam mechanism formula axial vibration drilling equipment.
Background
Vibratory drilling is one pulse cutting method. In the cutting process, a certain regular vibration is applied to the workpiece or the cutter, so that the cutting force is reduced, chip removal is enhanced, and the processing quality and the cutting efficiency of the hole are improved. However, in the conventional vibration-assisted drilling apparatus, the vibration motor is installed at the tail of the drilling apparatus to provide periodic vibration, so that not only the vibration is attenuated a lot when being transmitted and the ideal vibration law cannot be realized when being transmitted to the drill, but also the problems of self-synchronization of the vibration motor and the like are accompanied, and the apparatus is too large in volume and weight and is not convenient for miniaturization.
Chinese patent ZL201080052001.0 discloses an axial processing device. The bearing is characterized in that a bearing with rolling parts and an elastic return part are adopted, the rolling parts in the bearing roll on a corrugated raceway at an axial part, and the traveling gear can be periodically moved along the traveling direction of a shaft during machining. Wherein the elastic return means push the travelling gear in the opposite direction to the movement of the shaft during the machining, so that the rotation of the shaft is accompanied by an axial oscillating movement. The invention abandons the traditional mode of using a vibration motor to generate vibration, solves the problems of self-synchronism of the vibration motor and the like, has compact structure and reduced volume and weight, is used for reaming, and has the following defects: 1. the device adopts gear drive, and manufacturing and installation accuracy require highly, and processing is complicated, and manufacturing cost is high, and the replaceability is relatively poor. 2. Because the gear in the device rotates in the needle bearing and moves axially, but the friction coefficient of the needle bearing is larger, the heat is generated greatly at high rotating speed, the needle bearing is easy to deform, the deformation or installation error of the shaft is sensitive, and the axial displacement is small, so the processing efficiency is limited.
SUMMERY OF THE UTILITY MODEL
To the not enough of prior art, the utility model discloses the technical problem who plans to solve provides a cam mechanism formula axial vibration drilling equipment. In the drilling process, an upper cam and a lower cam in the vibration mechanism are matched with a spring, so that regular vibration can be realized in the axial direction; through the matching of the spline shaft and the rolling spline pair, large torque can be transmitted while the spline shaft and the rolling spline pair move in the axial direction, and the drilling efficiency is improved.
The technical scheme adopted by the utility model for solving the technical problems is to provide a cam mechanism type axial vibration drilling device, which comprises a servo motor, a motor support and an upper cam; the method is characterized in that: the device also comprises a rolling spline shaft, a rolling spline pair, a main shaft bracket, a lower cam, a spring end cover, a spring and a spring baffle plate;
the servo motor is connected with one end of the rolling spline shaft through a coupler; one end of the motor support is fixedly connected with the rear end of the main shaft bracket through a bolt, and the other end of the motor support is fixedly connected with the servo motor; the rolling spline shaft penetrates through an end cover of the motor support, a main shaft support is arranged on the outer side of the rolling spline shaft, a pair of rolling bearings are arranged at two ends between the main shaft support and the rolling spline shaft, and the pair of rolling bearings are arranged at two ends of the main shaft support respectively and are positioned through the main shaft support, the end cover of the motor support and a spline shaft shoulder; the front end of the main shaft bracket is coaxially fixed on the rolling spline shaft through a bolt and a lower cam, two grooves are formed in the spline shaft outside the pair of rolling bearings, and sealing rings are placed in the grooves for sealing;
a rolling spline pair is arranged on the outer side of a spline part of the rolling spline shaft, the rear end of the rolling spline pair is fixedly connected with the upper cam through a bolt, the front end of the rolling spline pair is fixedly connected with the drill shaft through a bolt, an oil filling hole is formed in the outer side of the rolling spline pair and is a through hole, and a retainer and an oil nozzle in the rolling spline pair are connected; the oil nozzle is arranged near the through hole on the outer surface of the rolling spline pair; one side of the upper cam facing the lower cam is provided with uniformly distributed through holes, ball bearings are embedded in the through holes, and rolling parts are arranged in the ball bearings; wherein the ball bearing is in transition fit with the through hole;
the lower cam is provided with a corrugated roller path for rolling the rolling part, the maximum depth of the corrugated roller path is less than or equal to the diameter of the rolling part, and the number of the corrugations in the corrugated roller path is consistent with that of the ball bearings;
a spring end cover is arranged at one end, close to the rolling spline pair, of the inner side defined by the drill spindle and the rolling spline pair, a plurality of spring grooves used for mounting springs are formed in the front end of the spring end cover, a spring baffle is arranged at the front end of the spring end cover, and the springs are placed between the spring baffle and the spring end cover.
The tail end of the rolling spline shaft is provided with a thread and a key groove, and the front end of the spring baffle is positioned and prevented from loosening through a stop washer and a round nut; the drill bit is placed in a collet which is mounted in a nut, and the end of the drill shaft is connected with the nut through threads.
The lower cam structure is integrally in a two-stage circular ring shape, and the ring end face of the large circular ring is provided with a mounting through hole for fixing with the main shaft bracket and is fixedly connected with the front end of the main shaft bracket by a bolt; the ring end face of the small ring is internally provided with a corrugated raceway which is tangent with a rolling part in the ball bearing.
The shape of the corrugations in the corrugated track is arranged as sine or cosine corrugations.
And one side of the upper cam facing the rolling spline pair is provided with a shaft shoulder which is matched and fixed with the rolling spline pair.
Compared with the prior art, the utility model discloses beneficial effect lies in:
(1) the rolling spline pair is added in the device, wherein a plurality of balls in the rolling spline pair can roll in the retainer in the rolling spline pair, so that the bearing capacity is higher than that of the rolling spline pair using a needle bearing and a common spline, and larger torque can be transmitted while linear motion is carried out. In addition, the rolling spline pair can control the clearance in the rotating direction to be zero clearance or interference, can perform high-speed linear motion and high-speed rotating motion, and has longer service life.
(2) The glib is installed in the vice outside of rolling spline, and its oil filler point is located the ball retainer in the middle of, runs through the spline pair, connects retainer and glib, can regularly add grease through the ball of glib toward the retainer in, and the lubricity is good, has further guaranteed the performance and the life-span of rolling spline pair and integral key shaft.
(3) The vibration mechanism in the device adopts the upper cam and the lower cam which are matched with the ball spline pair and the spring for use, wherein the upper cam and the lower cam have the characteristics of simple processing, low manufacturing cost and high replaceability.
(4) The device uses the double-row rolling bearing, can bear bidirectional axial load, and can bear larger axial load than a single-row bearing.
(5) The device has the advantages of high transmission efficiency, high positioning precision, good synchronization performance, long service life and the like. The upper cam and the lower cam are adopted, so that the cost is reduced while the function is realized. The whole device is compact and simple in structure, can be made into a small handheld vibration drilling device, can also be connected with a linear motion platform and is installed on a machine tool for use.
Compared with the prior art, the device has the advantages that the device is simple and compact in structure, high in efficiency, convenient to use, low in cost, small in size, light in weight, convenient to miniaturize and long in service life, the rotating speed can reach more than 800r/min in the occasions of high-rotating-speed deep long hole machining, the coaxiality can be guaranteed during high-speed rotation, and the practicability is higher.
Drawings
Fig. 1 is the utility model relates to an overall structure section main view structure sketch map of an embodiment of cam mechanism formula axial vibration drilling equipment.
Fig. 2 is an axonometric view of the lower cam of an embodiment of the cam mechanism type axial vibration drilling device of the present invention.
Fig. 3 is a front view of a lower cam of an embodiment of the axial vibration drilling device with cam mechanism according to the present invention.
3 fig. 3 4 3 is 3 a 3 sectional 3 view 3 a 3- 3 a 3 of 3 fig. 3 3 3. 3
Fig. 5 is a sectional view B-B of fig. 3.
Fig. 6 is a cross-sectional view C-C of fig. 3.
Fig. 7 is a front view of a ball bearing according to an embodiment of the present invention.
3 fig. 3 8 3 is 3 a 3 cross 3- 3 sectional 3 view 3 of 3 an 3 upper 3 cam 3 assembly 3 a 3- 3 a 3 of 3 an 3 embodiment 3 of 3 a 3 cam 3 mechanism 3 type 3 axial 3 vibration 3 drilling 3 apparatus 3 of 3 the 3 present 3 invention 3. 3
Fig. 9 is a front view of an upper cam assembly of an embodiment of the axial vibration drilling apparatus of the present invention.
In the figure: 1. a servo motor; 2. a motor support; 3. a coupling; 4. a spindle support; 5. a rolling bearing; 6. a lower cam; 7. a bolt; 8. an upper cam; 9. a nozzle tip; 10. a spring end cap; 11. rolling the spline shaft; 12. a seal ring; 13. a rolling member; 14. a ball bearing; 15. a rolling spline pair; 16. a spring; 17. a spring baffle; 18. a stop washer; 19. a round nut; 20. a drill shaft; 21. a collet; 22. a nut; 23. a drill bit.
Detailed Description
Specific embodiments of the present invention are given below. The specific examples are only used to illustrate the present invention in further detail, and do not limit the scope of the present invention.
The utility model provides a cam mechanism type axial vibration drilling device (see figure 1, for short device), which comprises a rolling spline shaft 11, a rolling spline pair 15, a main shaft bracket 4, a lower cam 6, a spring end cover 10, a spring 16, a spring baffle 17, a stop washer 18, a servo motor 1, a motor support 2, an upper cam 8 and a round nut 19;
the lower cam 6, the ball bearing 14, the upper cam 8, the rolling spline pair 15, the spring end cover 10, the spring 16, the spring baffle 17, the stop washer 18 and the round nut 19 form a vibration mechanism;
the servo motor 1 provides a power source and is connected with one end of the rolling spline shaft 11 through the coupler 3; one end of the motor support 2 is fixedly connected with the rear end of the main shaft bracket 4 through a bolt, and the other end of the motor support is fixedly connected with the servo motor 1; the rolling spline shaft 11 penetrates through an end cover of the motor support, a main shaft support 4 is arranged on the outer side of the rolling spline shaft, a pair of rolling bearings 5 are arranged at two ends between the main shaft support 4 and the rolling spline shaft, and the pair of rolling bearings 5 are respectively arranged at two ends of the main shaft support and are respectively positioned through the main shaft support 4, the end cover of the motor support 2 and a spline shaft shoulder; the front end of the main shaft bracket is coaxially fixed on the rolling spline shaft through a bolt and the lower cam 6, two grooves (namely the matching surface of the end cover of the motor support 2 and the spline shaft 11 of the rolling shaft and the matching surface of the lower cam 6 and the rolling spline shaft 11) are arranged on the spline shaft outside a pair of rolling bearings, and a sealing ring 12 is arranged in each groove for sealing;
a rolling spline pair 15 is arranged on the outer side of a spline part of the rolling spline shaft, the rear end of the rolling spline pair 15 is fixedly connected with an upper cam 8 through a bolt 7, the front end of the rolling spline pair is fixedly connected with a drill shaft 20 through a bolt, an oil filling hole is formed in the outer side of the rolling spline pair 15, a retainer is arranged in the rolling spline pair, balls are arranged in the retainer, and the oil filling hole is a through hole and is connected with the retainer in the rolling spline pair and an oil nozzle 9; the oil nozzle 9 is arranged near a through hole on the outer surface of the rolling spline pair 15, and the oil nozzle and the contact part of the rolling spline pair 15 and the rolling spline shaft 11 are communicated through an oil filling hole; one side of the upper cam 8 facing the lower cam 6 is provided with uniformly distributed through holes (as shown in figures 8 and 9), ball bearings 14 are embedded in the through holes, and rolling components 13 are arranged in the ball bearings 14; wherein the ball bearing 14 is in transition fit with the through hole; one side of the upper cam facing the rolling spline pair 15 is provided with a shaft shoulder which is matched and fixed with the rolling spline pair.
The whole lower cam structure is in a two-stage circular ring shape, and the ring end face of the large circular ring is provided with a mounting through hole for fixing with the main shaft support and is fixedly connected with the front end of the main shaft support 4 through a bolt. The ring end face of the small circular ring is internally provided with a corrugated raceway 6-1 which is tangent (namely point contact) with a rolling part in the ball bearing 14. And the number of ball bearings is equal to the number of corrugations on the lower cam surface. The maximum depth of the corrugated roller path is less than or equal to the diameter of the rolling part, the number of the corrugations in the corrugated roller path is consistent with that of the ball bearings, and after the corrugated roller path is installed, the rolling part in the ball bearings can roll in the corresponding corrugations of the corrugated roller path. The shape of the ripple in the corrugated track is set as sine or cosine ripple, and the lower cam has sine or cosine motion law at the moment, so that the impact is small and the motion is stable.
A spring end cover 10 is arranged at one end, close to the rolling spline pair, of the inner side defined by the drill spindle 20 and the rolling spline pair 15, a plurality of spring grooves for mounting springs 16 are formed in the front end of the spring end cover 10, a spring baffle 17 is arranged at the front end of the spring end cover, the springs 16 are placed between the spring baffle and the spring end cover, and the number of the springs is equal to the number of the spring grooves in the spring end cover 10; the tail end of the rolling spline shaft 11 is provided with a thread and a key groove, and the front end of the spring baffle 17 is positioned and prevented from loosening through a stop washer 18 and a round nut 19; the drill bit 23 is placed in a collet 21, the collet 21 is mounted in a nut 22, and the end of the drill shaft 20 is threadedly coupled to the nut 22.
The utility model discloses cam mechanism formula axial vibration drilling equipment's theory of operation and work flow are:
the servo motor is connected with the rolling spline shaft through the coupler, when the servo motor is started, the output shaft of the servo motor drives the rolling spline shaft and the rolling spline pair to rotate together, and the rolling spline pair and the drill shaft are fixedly connected through the bolt, so that the drill bit on the drill shaft is further driven to rotate together, and the rotating function of the drill bit is realized.
On the other hand, as the cam mechanism is adopted as a vibration source, the ball bearing is embedded in the upper cam and is fixedly connected with the upper cam through the bolt and the rolling spline pair. One surface of the lower cam is a corrugated raceway 6-1 and is fixedly connected with the main shaft bracket through a bolt; when the servo motor drives the rolling spline shaft and the rolling spline pair to rotate together, the upper cam rotates at the same rotating speed with the rolling spline shaft, the lower cam is fixed and does not move along with the spindle support, at the moment, the upper cam and the lower cam rotate relatively, and a rolling part in a ball bearing of the upper cam rotates relatively on a corrugated raceway of the lower cam surface. Because the depth of the corrugated raceway is a fixed amplitude, the upper cam will have an axial displacement in the axial direction. When the rolling parts on the ball bearing rotate to the highest point of the corrugated raceway, the spring exerts resilience on the rolling spline pair to enable the rolling parts to continue rotating and return to the low point. The drill bit on the drill shaft completes a cycle of vibration. This is repeated, and a continuous periodic axial vibration can be generated in the drill bit.
Examples
The number of ball bearings in this embodiment is 3 (see fig. 8 and 9). The number of the sinusoidal surface cycles of the lower cam corrugated raceway is 3, and the amplitude is 0.1-0.5 mm.
The utility model discloses but the device bearing capacity and transmission moment of torsion are big, lubricated effectual, long service life, simple structure compactness, small light in weight, the miniaturization of being convenient for, can effectively solve difficult processing combined material when processing deep slot hole, the rotational speed is low, the radiating effect is poor, the poor problem of processingquality.
The utility model discloses do not state the part and be applicable to prior art.
Claims (5)
1. A cam mechanism type axial vibration drilling device comprises a servo motor, a motor support and an upper cam; the method is characterized in that: the device also comprises a rolling spline shaft, a rolling spline pair, a main shaft bracket, a lower cam, a spring end cover, a spring and a spring baffle plate;
the servo motor is connected with one end of the rolling spline shaft through a coupler; one end of the motor support is fixedly connected with the rear end of the main shaft bracket through a bolt, and the other end of the motor support is fixedly connected with the servo motor; the rolling spline shaft penetrates through an end cover of the motor support, a main shaft support is arranged on the outer side of the rolling spline shaft, a pair of rolling bearings are arranged at two ends between the main shaft support and the rolling spline shaft, and the pair of rolling bearings are arranged at two ends of the main shaft support respectively and are positioned through the main shaft support, the end cover of the motor support and a spline shaft shoulder; the front end of the main shaft bracket is coaxially fixed on the rolling spline shaft through a bolt and a lower cam, two grooves are formed in the spline shaft outside the pair of rolling bearings, and sealing rings are placed in the grooves for sealing;
a rolling spline pair is arranged on the outer side of a spline part of the rolling spline shaft, the rear end of the rolling spline pair is fixedly connected with the upper cam through a bolt, the front end of the rolling spline pair is fixedly connected with the drill shaft through a bolt, an oil filling hole is formed in the outer side of the rolling spline pair and is a through hole, and a retainer and an oil nozzle in the rolling spline pair are connected; the oil nozzle is arranged near the through hole on the outer surface of the rolling spline pair; one side of the upper cam facing the lower cam is provided with uniformly distributed through holes, ball bearings are embedded in the through holes, and rolling parts are arranged in the ball bearings; wherein the ball bearing is in transition fit with the through hole;
the lower cam is provided with a corrugated roller path for rolling the rolling part; a spring end cover is arranged at one end, close to the rolling spline pair, of the inner side defined by the drill spindle and the rolling spline pair, a plurality of spring grooves used for mounting springs are formed in the front end of the spring end cover, a spring baffle is arranged at the front end of the spring end cover, and the springs are placed between the spring baffle and the spring end cover.
2. The drilling device as claimed in claim 1, wherein the end of the rolling spline shaft is provided with a thread and a key groove, and the front end of the spring baffle is positioned and prevented from loosening through a stop washer and a round nut; the drill bit is placed in a collet which is mounted in a nut, and the end of the drill shaft is connected with the nut through threads.
3. The drilling device as claimed in claim 1, wherein the lower cam is integrally in a two-stage circular ring shape, and the ring end face of the large circular ring is provided with a mounting through hole for fixing with the main shaft bracket and fixedly connected with the front end of the main shaft bracket by a bolt; the ring end face of the small ring is internally provided with a corrugated raceway which is tangent with a rolling part in the ball bearing.
4. Drilling device according to claim 1, wherein the shape of the corrugations in the corrugated track is arranged as sine or cosine corrugations.
5. The drilling device as claimed in claim 1, wherein a shoulder is formed on one side of the upper cam facing the rolling spline pair and is matched and fixed with the rolling spline pair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921662205.0U CN210548265U (en) | 2019-09-29 | 2019-09-29 | Cam mechanism type axial vibration drilling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921662205.0U CN210548265U (en) | 2019-09-29 | 2019-09-29 | Cam mechanism type axial vibration drilling device |
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| CN210548265U true CN210548265U (en) | 2020-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921662205.0U Active CN210548265U (en) | 2019-09-29 | 2019-09-29 | Cam mechanism type axial vibration drilling device |
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| CN (1) | CN210548265U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110480062A (en) * | 2019-09-29 | 2019-11-22 | 河北工业大学 | A kind of cam mechanism type axial vibration drilling equipment |
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2019
- 2019-09-29 CN CN201921662205.0U patent/CN210548265U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110480062A (en) * | 2019-09-29 | 2019-11-22 | 河北工业大学 | A kind of cam mechanism type axial vibration drilling equipment |
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