Single-lead-screw high-precision boring head

Abstract

The utility model discloses a high-precision boring head with a single lead screw, which belongs to the field of boring heads and comprises a boring head body, and a radial lead screw groove is arranged at the front end of the boring head body and penetrates through the circle center of the boring head body. A boring cutter lead screw is arranged in the radial lead screw groove and connected with a boring cutter nut in a threaded mode, a boring cutter sliding seat is arranged on the boring cutter nut, and a boring cutter is connected to the boring cutter sliding seat. The device further comprises two balance weight sliding ways which are symmetrically arranged with the radial lead screw groove as the reference, and balance weight blocks slide in the balance weight sliding ways. Long vertical blocks are arranged between the two balance weight sliding ways and the radial lead screw groove for separation, rotating shafts are arranged at the two ends of each long vertical block, needle bearings are arranged on the rotating shafts in a rotating mode, synchronous belts are arranged on the rotating shafts, one sides of the synchronous belts are connected with the boring cutter sliding seats, the other sides of the synchronous belts are connected with the balance weight blocks, and the total weight of the two balance weight blocks is equal to the total weight of the boring cutter, the boring cutter sliding seats and the boring cutter nuts. A driving device is further arranged on the boring head body to drive the boring cutter lead screw to rotate. The structure can avoid centrifugal force caused by rotation of the boring head, and further improves the machining precision.

Description

Technical Field

[0001] The utility model relates to the field of boring heads, in particular to a single-screw high-precision boring head. Background Art

[0002] At present, due to structural limitations, boring heads are often unable to achieve high-speed rotation requirements and high-precision boring processing. The main reason is that when the boring cutter moves on the boring head, the boring head becomes eccentric. Since the centrifugal force increases when the boring head rotates at a high speed, the faster the speed, the more likely it is to vibrate, thus affecting the actual processing. In order to solve the above problems, a counterweight is currently added to the boring head to balance the boring cutter. However, in the actual processing process, the boring cutter needs to move on the boring head, while the counterweight can only be fixed on the boring head, resulting in eccentricity when the boring cutter moves.

[0003] In view of the above problems existing in the prior art, the utility model designs and manufactures a single-screw high-precision boring head to overcome the above defects. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model provides a single-screw high-precision boring head, on which a counterweight block capable of linkage with a boring cutter is arranged, thereby avoiding centrifugal force caused by the rotation of the boring head and further improving the processing accuracy.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a single-screw high-precision boring head, comprising a boring head body, a radial screw groove is provided at the front end of the boring head body, and the radial screw groove passes through the center of the boring head body;

[0006] A boring tool screw is arranged in the radial screw groove, a boring tool nut is screwed on the boring tool screw, a boring tool slide is arranged on the boring tool nut, a boring tool block is connected to the boring tool slide, and a boring tool is arranged on the boring tool block;

[0007] The boring head body is also provided with two counterweight slideways, which are symmetrically arranged with the radial screw groove as a reference, and counterweight blocks slide in both counterweight slideways;

[0008] Long blocks are provided between the two counterweight slideways and the radial screw grooves for spacing, rotating shafts are provided at both ends of the long blocks, needle bearings are rotated on the rotating shafts, synchronous belts are provided on the needle bearings at both ends of the same long block, the teeth of the synchronous belts face outwards, the synchronous belt on one side of the long block is connected to the boring tool slide seat, and the synchronous belt on the other side of the long block is connected to the counterweight block, and the total weight of the two counterweight blocks is equal to the total weight of the boring tool, boring tool block, boring tool slide seat and boring tool nut;

[0009] The boring head body is also provided with a motor installation cavity, in which a motor is installed. The motor drives the boring cutter lead screw to rotate through a transmission mechanism.

[0010] Preferably, the screw groove comprises an arc groove, the boring tool screw is located in the arc groove, and the diameter of the arc groove is slightly larger than the diameter of the boring tool screw;

[0011] A guide slot is provided outside the arc slot, the boring tool slide is located in the guide slot, the width of the guide slot is greater than the diameter of the arc slot, and the boring tool slide can be guided and slid in the guide slot through a boring tool nut and a boring tool lead screw.

[0012] Preferably, two pressing plates are provided at the front end of the boring head body, and the two pressing plates can respectively restrict the counterweight block from detaching from the counterweight slideway;

[0013] A gap is arranged between the two pressing plates, the boring tool block can slide in the gap, the width of the gap is smaller than the width of the boring tool slide seat, and the two pressing plates can limit the boring tool slide seat from being separated from the guide slide groove.

[0014] Preferably, a lubricating oil groove is provided on the contact surface between the counterweight block and the counterweight slideway and the contact surface between the counterweight block and the pressure plate;

[0015] The contact surface between the boring tool slide and the guide slide groove and the contact surface between the boring tool slide and the pressing plate are provided with lubricating oil grooves;

[0016] A lubricating medium is arranged in the lubricating oil groove.

[0017] Preferably, both ends of the radial screw groove are provided with vertical plates, the vertical plates are provided with connecting holes, and the boring screw is connected to the connecting holes through bearings;

[0018] One end of the boring tool lead screw extends outward from the vertical plate and is connected to a driven gear;

[0019] A driving gear is connected to the motor shaft of the motor, and the driving gear is meshed with a driven gear. The motor drives the boring cutter screw to rotate through the driving gear and the driven gear.

[0020] Preferably, a suspended space is provided between the motor and the bottom of the motor installation cavity, and the motor is suspended and installed in the motor installation cavity through a motor mounting frame;

[0021] Both ends of the suspended space are provided with a protection belt steering connection block, the outer side of the protection belt steering connection block protrudes from the vertical plate and the driving gear and the driven gear, and a protection belt walking gap is provided between the bottom of the protection belt steering connection block and the bottom of the motor installation cavity;

[0022] Steering shafts are provided at both ends of the interval, and the two ends of the steering shafts are connected to two pressure plates. The distance between the steering shaft close to the driven gear and the center of the boring head body is greater than the distance between the outer end of the driven gear and the center of the boring head body, and a gap is provided between the other steering shaft and the adjacent vertical plate;

[0023] It also includes a circle of protection belt, which is wound around two steering shafts and two protection belt steering connecting blocks, and the boring tool slide is connected to the protection belt;

[0024] Preferably, the guard belt steering connection block is provided with an arc transition surface at the guard belt steering position.

[0025] Preferably, a groove is provided on one side of the two pressing plates close to the other pressing plate, and both sides of the protection belt can extend into the groove.

[0026] Preferably, it further comprises an electric spindle, and the rear end of the boring head body is connected to the front end of the electric spindle.

[0027] Preferably, it also includes an electric slip ring, which is connected to the rear end of the electric spindle and can be connected to the motor through a wire.

[0028] The utility model is beneficial in that:

[0029] 1. The utility model utilizes the boring tool nut, boring tool slide and other structures on the boring tool lead screw and the counterweight blocks on both sides, and through two synchronous belts, the movement of the boring tool slide and the counterweight block is always opposite, and the stability of the center of gravity position of the boring head is always maintained, thereby realizing high-precision boring processing and improving the processing accuracy.

[0030] 2. The boring tool slide of the utility model is guided and positioned by the guide groove, and the counterweight block is guided and positioned by the counterweight slideway, and with the help of the pressure plate, not only the sliding accuracy of the boring tool slide and the counterweight block is further improved, but also the inside of the boring head can be protected.

[0031] 3. The utility model utilizes a circle of protective belt to protect the components at the rear end of the interval, and the protective belt can move with the boring cutter slide, thereby preventing debris from entering the interior of the boring head body during the processing, thereby ensuring the internal environment and service life of the boring head. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of a single-screw high-precision boring head;

[0033] Figure 2 It is a structural schematic diagram of a single-screw high-precision boring head without a protective cover;

[0034] Figure 3 It is a structural schematic diagram of a single-screw high-precision boring head without a protective cover and a pressure plate;

[0035] Figure 4 It is a structural schematic diagram of a single-screw high-precision boring head without a protective cover, a pressure plate and a protective belt;

[0036] Figure 5 This is a front view of a single-screw high-precision boring head without a protective cover, a pressure plate, and a protective belt;

[0037] Figure 6 This is a schematic diagram of the internal structure of a single-screw high-precision boring head without the boring head body;

[0038] Figure 7 It is a schematic diagram of the structure on the nut of a single-screw high-precision boring head and boring cutter;

[0039] Figure 8 It is a structural schematic diagram of a boring head main body of a single-screw high-precision boring head;

[0040] Fig. 9 It is a side view of the main body of a single-screw high-precision boring head;

[0041] Fig.10 It is a schematic diagram of a single-screw high-precision boring head pressure plate;

[0042] Fig.11 A cross-sectional view of a single-screw high-precision boring head pressure plate.

[0043] In the figure: 1-electric spindle, 2-electric slip ring, 3-boring head body, 4-protective cover, 5-pressure plate, 6-boring block, 7-boring tool, 8-protective belt, 9-counterweight block, 10-steering shaft, 11-long vertical block, 12-rotating shaft, 13-boring tool slide, 14-vertical plate, 15-driving gear, 16-intermediate gear, 17-driven gear, 18-boring tool screw, 19-boring tool nut, 20-motor, 21-protective belt steering connecting block, 31-motor installation cavity, 32-radial screw groove, 33-guide slide groove, 34-counterweight slideway, 51-groove, 131-matching groove, 132-convex tooth, 133-lubricating column hole. DETAILED DESCRIPTION

[0044] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0045] like Figures 1 to 11 As shown, a single-screw high-precision boring head includes a boring head body 3, which is approximately a cylindrical block as a whole. A radial screw groove 32 is provided at the front end of the boring head body 3, and the radial screw groove 32 passes through the center of the boring head body 3.

[0046] A boring screw 18 is arranged in the radial screw groove 32, a boring nut 19 is screwed on the boring screw 18, a boring slide 13 is arranged on the boring nut 19, a boring block 6 is connected to the boring slide 13, and a boring tool 7 is arranged on the boring block 6;

[0047] The boring head body 3 is also provided with two counterweight slideways 34, which are symmetrically arranged with the radial screw groove 32 as a reference, and a counterweight block 9 slides in both counterweight slideways 34;

[0048] A long block 11 is provided between the two counterweight slideways 34 and the radial screw groove 32 for spacing. A rotating shaft 12 is provided at both ends of the long block 11, and a needle bearing rotates on the rotating shaft 12. A synchronous belt is provided on the needle bearings at both ends of the same long block 11, and the teeth of the synchronous belt face outward. The synchronous belt on one side of the long block 11 is connected to the boring tool slide 13, and the synchronous belt on the other side of the long block 11 is connected to the counterweight block 9. The specific connection method can be achieved by processing a matching groove 131 with the same width of the synchronous belt on the side of the boring tool slide 13 close to the synchronous belt, and then providing a plurality of convex teeth 132 in the matching groove 131, and connecting the synchronous belt with the side wall of the long block 11 by utilizing the plurality of convex teeth 132. Similarly, the counterweight block 9 can also be connected to the synchronous belt in the above manner, so as to ensure the guided sliding with the side wall of the long block 11 at the position without the matching groove 131, thereby ensuring the sliding accuracy.

[0049] The total weight of the two counterweights 9 is equal to the total weight of the boring tool 7, the boring tool block 6, the boring tool slide 13 and the boring tool nut 19. The movements of the boring tool slide 13 and the counterweight 9 of the utility model are always opposite, so that when the boring tool 7 moves, the counterweight 9 also moves in conjunction, ensuring the stability of the center of gravity of the entire boring head, thereby realizing high-precision boring processing and improving the processing accuracy.

[0050] A motor installation cavity 31 is also provided on the boring head body 3. A motor 20 is installed in the motor installation cavity 31. The motor 20 drives the boring cutter lead screw 18 to rotate through a transmission mechanism.

[0051] The screw groove of the utility model specifically includes an arc groove, the boring tool screw 18 is located in the arc groove, the diameter of the arc groove is slightly larger than the diameter of the boring tool screw 18, a guide groove 33 is provided on the outer side of the arc groove, the boring tool slide 13 is located in the guide groove 33, the width of the guide groove 33 is larger than the diameter of the arc groove, the boring tool slide 13 can be guided and slid in the guide groove 33 through the boring tool nut 19 and the boring tool screw 18, thereby ensuring the accuracy of the boring tool slide 13 in the guide groove 33 during the sliding process.

[0052] Furthermore, two pressure plates 5 are provided at the front end of the boring head body 3. The two pressure plates 5 can respectively limit the counterweight block 9 from detaching from the counterweight slide 34, and can also protect the structure behind the pressure plate 5. A gap is provided between the two pressure plates 5, and the boring tool block 6 can slide in the gap. The width of the gap is smaller than the width of the boring tool slide 13. The two pressure plates 5 can limit the boring tool slide 13 from detaching from the guide slide groove 33.

[0053] Lubricating oil grooves are provided on the contact surfaces of the counterweight block 9 and the counterweight slide 34, as well as on the contact surfaces with the pressure plate 5. Lubricating oil grooves are provided on the contact surfaces of the boring tool slide 13 and the guide slide 33, as well as on the contact surfaces with the pressure plate 5. Lubricating oil grooves are provided in the lubricating oil grooves, and lubricating medium is provided in the lubricating oil grooves to ensure the lubrication of relative motion. Preferably, a plurality of lubricating column holes 151 are provided on the upper end surface of the boring tool slide 13 or the counterweight block 9, and a copper column is preferably provided in the lubricating column hole 151. A compression spring is provided between the bottom of the copper column and the bottom of the lubricating column hole 151, so that the boring tool slide 13 or the counterweight block 9 and the pressure plate 5 are always guaranteed to have lubricated copper surface contact.

[0054] Both ends of the radial screw groove 32 of the utility model are provided with vertical plates 14, and connecting holes are provided on the vertical plates 14. The boring tool screw 18 is connected to the connecting hole through a bearing. One end of the boring tool screw 18 extends outward from the vertical plate 14 and is connected to a driven gear 17. A driving gear 15 is connected to the motor 20 shaft of the motor 20, and the driving gear 15 is meshed with the driven gear 17. Of course, in order to ensure the meshing of the driving gear 15 and the driven gear 17, a structure of intermediate gear 16 transfer can also be added between the driving gear 15 and the driven gear 17. The motor 20 drives the boring tool screw 18 to rotate through the driving gear 15 and the driven gear 17. The motor installation cavity 31 of the utility model is preferably independent of the radial screw groove 32, and the center of gravity position of the motor 20 when installed is preferably coincident with the center position of the boring head body 3.

[0055] A suspended space is provided between the motor 20 and the bottom of the motor installation cavity 31, and the motor 20 is suspended and installed in the motor installation cavity 31 through the motor 20 mounting frame; both ends of the suspended space of the utility model are provided with protective belt steering connecting blocks 21, the outer side of the protective belt steering connecting block 21 protrudes from the vertical plate 14 and the driving gear 15 and the driven gear 17, and a protective belt 8 walking gap is provided between the bottom of the protective belt steering connecting block 21 and the bottom of the motor installation cavity 31.

[0056] Steering shafts 10 are provided at both ends of the interval of the utility model, and both ends of the steering shaft 10 are connected to two pressure plates 5. The distance between the steering shaft 10 close to the driven gear 17 and the center of the boring head body 3 is greater than the distance between the outer end of the driven gear 17 and the center of the boring head body 3. The purpose is to form a gap between the steering shaft 10 and the driven gear 17. A gap is also provided between the other steering shaft 10 and the adjacent vertical plate 14. A circle of protective belt 8 is also included. The circle of protective belt 8 is wound around the two steering shafts 10 and the two protective belt steering connecting blocks 21, and the boring tool slide 13 is connected to the protective belt 8. In this way, when the boring tool 7 moves, the protective belt 8 also maintains a synchronous moving state. The circle of protective belt 8 is used to protect the components at the rear end of the interval, thereby preventing debris from entering the interior of the boring head body 3 during the processing process, thereby ensuring the environment inside the boring head and the service life.

[0057] In order to avoid scratching the guard strip 8 , the guard strip deflection connecting block 21 is preferably provided with an arc transition surface at the deflection position of the guard strip 8 .

[0058] In order to further improve the protective effect of the protective belt 8 on the interval between the pressure plates 5, a groove 51 is provided on one side of the two pressure plates 5 close to the other pressure plate 5, and both sides of the protective belt 8 can extend into the groove 51, thereby preventing debris from entering the boring head through the gap between the protective belt 8 and the pressure plate 5, and the movement of the protective belt 8 in the groove 51 will not be affected.

[0059] The utility model also includes an electric spindle 1, a rear end of a boring head body 3 is connected to the front end of the electric spindle 1, and also includes an electric slip ring 2, which is connected to the rear end of the electric spindle 1 and can be connected to the motor 20 through a wire to prevent the rotation of the boring head body 3 from affecting the power supply of the motor 20.

[0060] In order to prevent debris from entering the interior of the boring head from the radial screw groove 32 of the boring head body 3, the motor installation cavity 31, and the two ends of the guide groove 33, the utility model preferably provides a circle of protective cover 4 on the outside of the boring head body 3 for protection.

[0061] It should be understood that the purpose of these embodiments is only to illustrate the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all of these equivalent forms also fall within the protection scope defined by the claims attached to this application.

Claims

1. A single-screw high-precision boring head, characterized in that: It comprises a boring head body (3), the front end of which is provided with a radial screw groove (32), and the radial screw groove (32) passes through the center of the boring head body (3); A boring screw (18) is arranged in the radial screw groove (32), a boring nut (19) is screwed onto the boring screw (18), a boring slide seat (13) is arranged on the boring nut (19), a boring block (6) is connected to the boring slide seat (13), and a boring tool (7) is arranged on the boring block (6); The boring head body (3) is also provided with two counterweight slideways (34), the two counterweight slideways (34) are symmetrically arranged with the radial screw groove (32) as a reference, and a counterweight block (9) slides in both counterweight slideways (34); A long vertical block (11) is provided between the two counterweight slideways (34) and the radial screw groove (32) for spacing. A rotating shaft (12) is provided at both ends of the long vertical block (11). A needle bearing rotates on the rotating shaft (12). A synchronous belt is provided on the needle bearings at both ends of the same long vertical block (11). The teeth of the synchronous belt face outward. The synchronous belt on one side of the long vertical block (11) is connected to the boring tool slide seat (13). The synchronous belt on the other side of the long vertical block (11) is connected to the counterweight block (9). The total weight of the two counterweight blocks (9) is equal to the total weight of the boring tool (7), the boring tool block (6), the boring tool slide seat (13) and the boring tool nut (19). The boring head body (3) is also provided with a motor installation cavity (31), in which a motor (20) is installed, and the motor (20) drives the boring cutter screw (18) to rotate through a transmission mechanism.

2. A single-screw high-precision boring head according to claim 1, characterized in that: The lead screw groove comprises an arc-shaped groove, the boring tool lead screw (18) is located in the arc-shaped groove, and the diameter of the arc-shaped groove is slightly larger than the diameter of the boring tool lead screw (18); A guide slot (33) is provided on the outer side of the arc groove, the boring tool slide seat (13) is located in the guide slot (33), the width of the guide slot (33) is greater than the diameter of the arc groove, and the boring tool slide seat (13) can be guided and slid in the guide slot (33) through a boring tool nut (19) and a boring tool lead screw (18).

3. A single-screw high-precision boring head according to claim 2, characterized in that: Two pressing plates (5) are provided at the front end of the boring head body (3), and the two pressing plates (5) can respectively restrict the counterweight block (9) from detaching from the counterweight slideway (34); A gap is provided between the two pressing plates (5), the boring tool block (6) can slide in the gap, the width of the gap is smaller than the width of the boring tool slide (13), and the two pressing plates (5) can limit the boring tool slide (13) from detaching from the guide slot (33).

4. A single-screw high-precision boring head according to claim 3, characterized in that: The contact surface between the counterweight block (9) and the counterweight slideway (34) and the contact surface between the counterweight block (9) and the pressure plate (5) are both provided with lubricating oil grooves; A lubricating oil groove is provided on the contact surface between the boring tool slide seat (13) and the guide slide groove (33) and on the contact surface between the boring tool slide seat (13) and the pressure plate (5); A lubricating medium is arranged in the lubricating oil groove.

5. The single-screw high-precision boring head according to claim 3, characterized in that: Both ends of the radial screw groove (32) are provided with vertical plates (14), the vertical plates (14) are provided with connecting holes, and the boring screw (18) is connected to the connecting holes through bearings; One end of the boring tool lead screw (18) extends outward from the vertical plate (14) and is connected to a driven gear (17); A driving gear (15) is connected to the motor (20) shaft of the motor (20), and the driving gear (15) is meshed with a driven gear (17). The motor (20) drives the boring tool lead screw (18) to rotate through the driving gear (15) and the driven gear (17).

6. A single-screw high-precision boring head according to claim 5, characterized in that: A suspended space is provided between the motor (20) and the bottom of the motor installation cavity (31), and the motor (20) is suspended and installed in the motor installation cavity (31) via a motor (20) installation frame; Both ends of the suspended space are provided with a protection belt steering connection block (21), the outer side of the protection belt steering connection block (21) protrudes from the vertical plate (14) and the driving gear (15) and the driven gear (17), and a protection belt (8) running gap is provided between the bottom of the protection belt steering connection block (21) and the bottom of the motor installation cavity (31); Steering shafts (10) are provided at both ends of the interval, and both ends of the steering shaft (10) are connected to two pressure plates (5). The distance between the steering shaft (10) close to the driven gear (17) and the center of the boring head body (3) is greater than the distance between the outer end of the driven gear (17) and the center of the boring head body (3). A gap is provided between the other steering shaft (10) and the adjacent vertical plate (14); It also comprises a circle of protection belt (8), which is wound around two steering shafts (10) and two protection belt steering connection blocks (21), and the boring tool slide seat (13) is connected to the protection belt (8).

7. A single-screw high-precision boring head according to claim 6, characterized in that: The protection belt steering connection block (21) is provided with an arc transition surface at the steering position of the protection belt (8).

8. The single-screw high-precision boring head according to claim 6, characterized in that: A groove (51) is provided on one side of the two pressing plates (5) close to the other pressing plate (5), and both sides of the protection belt (8) can extend into the groove (51).

9. The single-screw high-precision boring head according to claim 1, characterized in that: It also comprises an electric spindle (1), and the rear end of the boring head body (3) is connected to the front end of the electric spindle (1).

10. A single-screw high-precision boring head according to claim 9, characterized in that: It also comprises an electric slip ring (2), which is connected to the rear end of the electric spindle (1), and the electric slip ring (2) can be connected to the motor (20) via a wire.

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