Machine tool power head

Abstract

The utility model relates to the technical field of machine tool power heads, and discloses a machine tool power head which comprises a machine body, a transmission seat and two overload protection mechanisms, a motor is mounted on the machine body, an output wheel is rotatably connected to the inner wall of the machine body, and the output shaft end of the motor is in transmission connection with the output wheel through a belt. A guide moving shaft and a driving ring are installed at the axis position of the transmission seat, the transmission seat is driven by two overload protection mechanisms, a sliding barrel is rotationally connected to the inner wall of the driving ring, a moving brake ring is installed on the sliding barrel, a fixed brake ring opposite to the moving brake ring is fixedly installed on the inner wall of the machine body, and an electric control module is installed in the machine body; the movable brake ring and the fixed brake ring are electrically connected with the electric control module through flexible wires. According to the utility model, after the screw sleeve is screwed out, the movable brake ring moves outwards, the fixed brake ring and the movable brake ring are finally separated from each other, the electric control module does not supply power to the motor, and then anti-overload and anti-deadlock protection is carried out on the motor.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tool power heads, and more specifically, to a machine tool power head. Background Art

[0002] In the prior art, the patent document with publication number CN207103863U discloses a CNC machine tool power head, whose structure includes a motor protective cover, a circuit box, an assembly clip, a transmission box, a transmission motor, a fixed plate, a spindle controller, an adjusting rod, an electric spindle, and a processing tool holder. The transmission box and the fixed plate are both rectangular structures and are connected by a snap-fitting manner. The rotating axis provided inside the electric spindle in the above-mentioned power head is fitted with the guide block through a guide thread on the striped surface, thereby ensuring dynamic balance during rotation and preventing forward and backward sliding, improving processing accuracy, and avoiding processing impact. However, the above-mentioned power head is not convenient for realizing motor overload and anti-locking protection through a mechanical control structure when in use. At the same time, the existing power head is not convenient for realizing position and direction change installation when installing the machine tool tool, and thus is not convenient for improving the flexibility and convenience when installing the tool. Based on this, the utility model provides a machine tool power head to solve the technical problems raised in the above-mentioned background technology. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, the present invention provides a machine tool power head. In the present invention, when a locking phenomenon occurs between the power shaft and the workpiece, the first permanent magnet block and the second permanent magnet block are set, so that the transmission column further penetrates into the guide arc groove and moves to the second specified position. The arc tooth plate is at the second specified position, connected to the gear ring and drives the sleeve. At this time, the sleeve is unscrewed from the inner screw. After the sleeve is unscrewed, the dynamic brake ring moves outward, and finally the fixed brake ring and the dynamic brake ring are disengaged. The electronic control module does not supply power to the motor, and then the motor is protected against overload and locking.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a machine tool power head, comprising a machine body, a motor mounted on the machine body, an output wheel rotatably connected to the inner wall of the machine body, an output shaft end of the motor being connected to the output wheel via a belt, and further comprising:

[0005] A transmission seat, with two overload protection mechanisms installed between the transmission seat and the output wheel, and a guide shaft installed on the axis of the transmission seat;

[0006] The drive ring is driven by two overload protection mechanisms. The inner wall of the drive ring is rotatably connected to a slide cylinder, on which a dynamic brake ring is mounted. The inner wall of the body is fixedly mounted with a fixed brake ring arranged opposite to the dynamic brake ring. An electric control module is installed inside the body. Both the dynamic brake ring and the fixed brake ring are electrically connected to the electric control module via flexible wires.

[0007] The eccentric rotary seat is rotatably connected to the machine body. The eccentric position of the eccentric rotary seat is rotatably connected to the power shaft. An eccentric transmission mechanism driven by the guide shaft is installed inside the machine body.

[0008] As an optimal technical solution of the present utility model, the overload protection mechanism includes a guide arc groove opened on the transmission seat and a transmission column installed on the output wheel, a first permanent magnet block is installed on the transmission column, a second permanent magnet block adapted to the first permanent magnet block is installed in the guide arc groove, the first permanent magnet block and the second permanent magnet block have the same magnetic properties, an arc tooth plate is installed on the transmission column, an inner screw is fixedly installed on the inner wall of the transmission seat, a screw sleeve is threadedly installed on the inner screw, a gear ring adapted to the arc tooth plate is installed on the screw sleeve, and the screw sleeve is rotatably connected to the drive ring.

[0009] As an optimal technical solution of the present invention, the axis of the inner screw is parallel to the rotation axis of the transmission seat, the first teeth are evenly distributed on the gear ring, the second teeth are evenly distributed in the arc tooth plate, and the length of the first teeth is 6 to 9 times the length of the second teeth.

[0010] As an optimal technical solution of the present invention, the eccentric transmission mechanism includes a gear shaft rotatably connected to the axis position of the eccentric rotary seat, the gear shaft is rotatably connected to the machine body, and a first gear is installed on the gear shaft and the guide shaft, and the two first gears are engaged with each other. A second gear is fixedly installed on the power shaft and the gear shaft, and the two second gears are engaged with each other. A locking gear is fixedly installed on the eccentric rotary seat, and a transmission worm is rotatably connected to the machine body, and the transmission worm is transmission-connected to the locking gear.

[0011] As a preferred technical solution of the present invention, the rotation axis of the gear shaft and the rotation axis of the guide shaft are not on the same straight line.

[0012] As a preferred technical solution of the present invention, pulleys adapted to be connected to the belt are fixedly mounted on the output shaft end and the output wheel of the motor.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. In the present invention, when a locking phenomenon occurs between the power shaft and the workpiece, the first permanent magnet block and the second permanent magnet block are arranged so that the transmission column moves further into the guide arc groove to the second designated position. The arc tooth plate is at the second designated position, connected to the gear ring and drives the sleeve. At this time, the sleeve is unscrewed from the inner screw. After the sleeve is unscrewed, the dynamic brake ring moves outward and eventually causes the fixed brake ring to disengage from the dynamic brake ring. The electronic control module stops supplying power to the motor, and then protects the motor from overload and locking.

[0015] 2. In the present invention, when it is necessary to adjust the layout position of the power shaft, the rotation angle of the eccentric rotary seat can be adjusted by setting the transmission worm, thereby facilitating the rapid change of direction and position of the relevant tools on the power shaft. When in use, the power shaft and the guide shaft can be coaxially arranged by setting the angle of the eccentric rotary seat. By achieving the above technical effects, the flexibility and convenience of tool installation are effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of a machine tool power head of the utility model;

[0017] Figure 2 For this utility model Figure 1 Schematic diagram of the cross-section structure;

[0018] Figure 3 For this utility model Figure 2 Schematic diagram of the local enlarged structure at A in the middle;

[0019] Figure 4 This is a schematic structural diagram of the output wheel and transmission seat of the utility model;

[0020] Figure 5 For this utility model Figure 4 Structural diagram from another perspective;

[0021] Figure 6 For this utility model Figure 5 Schematic diagram of the local enlarged structure at B in the middle;

[0022] Figure 7 This is a structural diagram of the guide shaft and the first gear of the utility model;

[0023] Figure 8 For this utility model Figure 7 Schematic diagram of the local enlarged structure at C in the middle;

[0024] Figure 9 It is a schematic diagram of the exploded structure of the inner screw and the screw sleeve of the utility model.

[0025] In the figure: 1. Machine body; 2. Motor; 3. Output wheel; 4. Transmission seat; 5. Guide shaft; 6. Drive ring; 7. Slide; 8. Dynamic brake ring; 9. Fixed brake ring; 10. Electronic control module; 11. Flexible wire; 12. Eccentric rotary seat; 13. Power shaft; 14. Guide arc groove; 15. Transmission column; 16. First permanent magnet block; 17. Second permanent magnet block; 18. Arc tooth plate; 19. Inner screw; 20. Screw sleeve; 21. Gear ring; 22. Gear shaft; 23. First gear; 24. Second gear; 25. Locking gear; 26. Transmission worm. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] like Figures 1 to 9 As shown, the utility model provides a machine tool power head, including a body 1, a motor 2 is installed on the body 1, an output wheel 3 is rotatably connected to the inner wall of the body 1, and the output shaft end of the motor 2 is connected to the output wheel 3 through a belt;

[0028] The output shaft end of the motor 2 and the output wheel 3 are both fixedly mounted with pulleys adapted to be connected to the belt;

[0029] When a locking phenomenon occurs between the power shaft 13 and the workpiece, the belt idles, and then the motor 2 is protected against overload;

[0030] Also includes:

[0031] Transmission base 4, two overload protection mechanisms are installed between the transmission base 4 and the output wheel 3, and a guide shaft 5 is installed at the axis position of the transmission base 4;

[0032] Drive ring 6, driven by two overload protection mechanisms;

[0033] The overload protection mechanism includes a guide arc groove 14 provided on the transmission base 4 and a transmission column 15 mounted on the output wheel 3. A first permanent magnet 16 is mounted on the transmission column 15. A second permanent magnet 17 adapted to the first permanent magnet 16 is mounted in the guide arc groove 14. The first permanent magnet 16 and the second permanent magnet 17 have the same magnetic properties.

[0034] The first permanent magnet block 16 and the second permanent magnet block 17 are arranged to have the same magnetic properties, so that a repulsive force is generated between the first permanent magnet block 16 and the second permanent magnet block 17;

[0035] An arc tooth plate 18 is mounted on the transmission column 15, an inner screw 19 is fixedly mounted on the inner wall of the transmission seat 4, a screw sleeve 20 is threadedly mounted on the inner screw 19, a gear ring 21 adapted to be connected to the arc tooth plate 18 is mounted on the screw sleeve 20, and the screw sleeve 20 is rotatably connected to the drive ring 6;

[0036] The axis of the inner screw 19 is parallel to the rotation axis of the transmission base 4. The first teeth are evenly distributed on the gear ring 21, and the second teeth are evenly distributed in the arc tooth plate 18. The length of the first teeth is 8 times the length of the second teeth.

[0037] The inner wall of the driving ring 6 is rotatably connected to a slide cylinder 7, on which a dynamic brake ring 8 is mounted. A fixed brake ring 9 arranged opposite to the dynamic brake ring 8 is fixedly mounted on the inner wall of the body 1. An electric control module 10 is mounted inside the body 1. Both the dynamic brake ring 8 and the fixed brake ring 9 are electrically connected to the electric control module 10 via flexible wires 11.

[0038] When there is no locking between the power shaft 13 and the workpiece, the first permanent magnet block 16 and the second permanent magnet block 17 are arranged so that the transmission column 15 can only move to the first position in the guide arc groove 14. When the arc tooth plate 18 is in the first position, it is not connected to the gear ring 21 and does not drive the screw sleeve 20. At this time, the fixed brake ring 9 and the dynamic brake ring 8 are in contact, the electronic control module 10 supplies power to the motor 2, and the motor 2 operates normally.

[0039] When a locking phenomenon occurs between the power shaft 13 and the workpiece, the first permanent magnet block 16 and the second permanent magnet block 17 are arranged so that the transmission column 15 further penetrates into the guide arc groove 14 and moves to the second designated position. The arc tooth plate 18 is at the second designated position, connected to the gear ring 21 and drives the screw sleeve 20. At this time, the screw sleeve 20 is unscrewed from the inner screw 19. After the screw sleeve 20 is unscrewed, the dynamic brake ring 8 moves outward and eventually causes the fixed brake ring 9 to break away from the dynamic brake ring 8. The electronic control module 10 stops supplying power to the motor 2, and then performs anti-overload and anti-lock protection on the motor 2.

[0040] The eccentric rotary seat 12 is rotatably connected to the machine body 1 . The eccentric position of the eccentric rotary seat 12 is rotatably connected to the power shaft 13 . An eccentric transmission mechanism driven by the guide shaft 5 is installed inside the machine body 1 .

[0041] The eccentric transmission mechanism includes a gear shaft 22 rotatably connected to the axis of the eccentric rotating seat 12. The gear shaft 22 is rotatably connected to the body 1. A first gear 23 is mounted on the gear shaft 22 and the guide shaft 5. The two first gears 23 are meshed with each other.

[0042] The power shaft 13 and the gear shaft 22 are both fixedly mounted with a second gear 24, and the two second gears 24 are meshed with each other;

[0043] A locking gear 25 is fixedly mounted on the eccentric rotary seat 12 , and a transmission worm 26 is rotatably connected to the machine body 1 . The transmission worm 26 is in transmission connection with the locking gear 25 .

[0044] The rotation axis of the gear shaft 22 and the rotation axis of the guide shaft 5 are not on the same straight line.

[0045] When the position of the power shaft 13 needs to be adjusted, the rotation angle of the eccentric rotary seat 12 can be adjusted by setting the transmission worm 26, thereby facilitating the rapid change of direction and position of the relevant tool on the power shaft 13. In addition, when in use, the power shaft 13 and the guide shaft 5 can be coaxially arranged by setting the angle of the eccentric rotary seat 12.

[0046] The working principle and use process of this utility model:

[0047] When a locking phenomenon occurs between the power shaft 13 and the workpiece, the belt idles, and then the motor 2 is protected against overload;

[0048] When there is no locking between the power shaft 13 and the workpiece, the first permanent magnet block 16 and the second permanent magnet block 17 are arranged so that the transmission column 15 can only move to the first position in the guide arc groove 14. When the arc tooth plate 18 is in the first position, it is not connected to the gear ring 21 and does not drive the screw sleeve 20. At this time, the fixed brake ring 9 and the dynamic brake ring 8 are in contact, the electronic control module 10 supplies power to the motor 2, and the motor 2 operates normally.

[0049] When a locking phenomenon occurs between the power shaft 13 and the workpiece, the first permanent magnet block 16 and the second permanent magnet block 17 are arranged so that the transmission column 15 further penetrates into the guide arc groove 14 and moves to the second designated position. The arc tooth plate 18 is at the second designated position, connected to the gear ring 21 and drives the screw sleeve 20. At this time, the screw sleeve 20 is unscrewed from the inner screw 19. After the screw sleeve 20 is unscrewed, the dynamic brake ring 8 moves outward and eventually causes the fixed brake ring 9 to break away from the dynamic brake ring 8. The electronic control module 10 stops supplying power to the motor 2, and then performs anti-overload and anti-lock protection on the motor 2.

[0050] When it is necessary to adjust the layout position of the power shaft 13, the rotation angle of the eccentric rotary seat 12 can be adjusted by setting the transmission worm 26, thereby facilitating the rapid change of direction and position of the relevant tools on the power shaft 13. During use, by setting the angle of the eccentric rotary seat 12, the power shaft 13 and the guide shaft 5 can be set coaxially.

Claims

1. A machine tool power head, comprising a machine body (1), a motor (2) mounted on the machine body (1), an output wheel (3) rotatably connected to the inner wall of the machine body (1), characterized in that: The output shaft end of the motor (2) is connected to the output wheel (3) through a belt, and further comprises: A transmission seat (4), two overload protection mechanisms are installed between the transmission seat (4) and the output wheel (3), and a guide shaft (5) is installed at the axis position of the transmission seat (4); A driving ring (6) is driven by two overload protection mechanisms, the inner wall of the driving ring (6) is rotatably connected to a slide cylinder (7), a dynamic brake ring (8) is installed on the slide cylinder (7), the inner wall of the body (1) is fixedly installed with a fixed brake ring (9) arranged relative to the dynamic brake ring (8), an electric control module (10) is installed inside the body (1), and the dynamic brake ring (8) and the fixed brake ring (9) are both electrically connected to the electric control module (10) through a soft wire (11); An eccentric rotary seat (12) is rotatably connected to the machine body (1); an eccentric position of the eccentric rotary seat (12) is rotatably connected to a power shaft (13); and an eccentric transmission mechanism driven by a guide shaft (5) is installed inside the machine body (1).

2. A machine tool power head according to claim 1, characterized in that: The overload protection mechanism comprises a guide arc groove (14) provided on a transmission seat (4) and a transmission column (15) installed on an output wheel (3), wherein a first permanent magnet block (16) is installed on the transmission column (15), a second permanent magnet block (17) adapted to the first permanent magnet block (16) is installed in the guide arc groove (14), and the first permanent magnet block (16) and the second permanent magnet block (17) have the same magnetic properties, an arc tooth plate (18) is installed on the transmission column (15), an inner screw rod (19) is fixedly installed on the inner wall of the transmission seat (4), a screw sleeve (20) is threadedly installed on the inner screw rod (19), a gear ring (21) adapted to the arc tooth plate (18) is installed on the screw sleeve (20), and the screw sleeve (20) is rotatably connected to the drive ring (6).

3. A machine tool power head according to claim 2, characterized in that: The axis of the inner screw (19) is parallel to the rotation axis of the transmission seat (4), the gear ring (21) is evenly distributed with first teeth, the arc tooth plate (18) is evenly distributed with second teeth, and the length of the first teeth is 6 to 9 times the length of the second teeth.

4. A machine tool power head according to claim 3, characterized in that: The eccentric transmission mechanism includes a gear shaft (22) rotatably connected to the axis position of the eccentric rotary seat (12), the gear shaft (22) is rotatably connected to the body (1), the gear shaft (22) and the guide shaft (5) are both mounted with a first gear (23), the two first gears (23) are meshed with each other, the power shaft (13) and the gear shaft (22) are both fixedly mounted with a second gear (24), the two second gears (24) are meshed with each other, a locking gear (25) is fixedly mounted on the eccentric rotary seat (12), a transmission worm (26) is rotatably connected to the body (1), and the transmission worm (26) is transmission-connected to the locking gear (25).

5. The machine tool power head according to claim 4, characterized in that: The rotation axis of the gear shaft (22) and the rotation axis of the guide shaft (5) are not on the same straight line.

6. The machine tool power head according to claim 1, characterized in that: A pulley adapted to be connected to the belt is fixedly mounted on the output shaft end of the motor (2) and the output wheel (3).

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