An angle attachment head with belt drive

Abstract

The invention discloses an angle accessory head with a belt drive, comprising a housing, a power mechanism, a transmission mechanism and a main shaft; the power mechanism and the transmission mechanism are placed in the housing; the power mechanism comprises a servo motor and a reducer, the servo motor is connected to the reducer, the input shaft and the output shaft of the reducer are arranged vertically; the transmission mechanism comprises a driving wheel, a transmission belt and a driven wheel, the output shaft of the reducer is equipped with a driving wheel; one side of the main shaft is installed on the housing through a rotating shaft, the end of the rotating shaft away from the main shaft is equipped with a driven wheel, the driving wheel and the driven wheel are connected through a transmission belt, and the main shaft and the power mechanism are located on the same side of the transmission mechanism. The accessory head has the advantages of small size, simple structure, and suitable for deep cavity processing.

Description

Technical Field

[0001] The invention relates to the technical field of machine tool spindles, and in particular to an angle accessory head with a belt drive. Background Art

[0002] Deep cavity processing is often required in the fields of aviation and national defense. However, the existing machine tool spindles are generally installed on the machine tool at a fixed angle, or the angle needs to be adjusted manually, which makes them bulky and unsuitable for processing deep cavity structures in narrow spaces. Summary of the invention

[0003] The invention provides an angle accessory head with a belt drive, which solves the problem that the existing machine tool accessory head is bulky, has a complex structure and is not suitable for deep cavity processing.

[0004] The technical means adopted by the present invention are as follows:

[0005] An angle accessory head with a drive, comprising a housing, a power mechanism, a transmission mechanism and a main shaft; the power mechanism and the transmission mechanism are placed in the housing;

[0006] The power mechanism comprises a servo motor and a reducer, the servo motor is connected to the reducer, and the input shaft and output shaft of the reducer are arranged perpendicularly;

[0007] The transmission mechanism comprises a driving wheel, a transmission belt and a driven wheel, and the driving wheel is mounted on the output shaft of the reducer;

[0008] One side of the main shaft is installed on the housing through a rotating shaft, the driven wheel is installed at one end of the rotating shaft away from the main shaft, the driving wheel and the driven wheel are connected through the transmission belt, and the main shaft and the power mechanism are located on the same side of the transmission mechanism.

[0009] Furthermore, one end of the housing is a main shaft mounting end, the main shaft mounting end is provided with a main shaft mounting portion, the main shaft is mounted on the main shaft mounting portion via a rotating shaft, and the main shaft and the driven wheel are placed on both sides of the main shaft mounting portion.

[0010] Furthermore, a clamping device for clamping the main shaft is installed on one side of the main shaft mounting portion on which the driven wheel is provided, and the clamping device is placed between the main shaft mounting portion and the driven wheel.

[0011] Furthermore, the clamping device is a pneumatic shaft clamping device.

[0012] Furthermore, a fixed disk is provided at one end of the rotating shaft connected to the main shaft, the rotating shaft is fixedly connected to the main shaft through the fixed disk, and an angle measuring system for measuring the swing angle of the main shaft is installed on the side of the fixed disk facing the driven wheel.

[0013] Furthermore, the angle measurement system includes a circular grating and a reading head, wherein the circular grating is mounted on the fixed plate, and the reading head is mounted on the spindle mounting portion.

[0014] Furthermore, an angle measurement system accommodating cavity is provided on the side of the spindle mounting portion facing the spindle, the reading head is installed on the inner wall of the angle measurement system accommodating cavity, the circular grating is installed on the fixed plate, and in the axial direction of the rotating shaft, part of the circular grating is placed in the angle measurement system accommodating cavity.

[0015] Compared with the prior art, the angle accessory head with belt drive described in the present invention has the following advantages: the servo motor is arranged longitudinally (in a vertical state), and the main shaft is driven by the reducer and the belt drive structure, so that the main shaft is in the space of the extension line of the servo motor output shaft, thereby reducing the space occupied by the servo motor and the main shaft, reducing the volume of the swing accessory head, and allowing the main shaft to enter a narrow space. At the same time, since the belt drive structure can drive the main shaft to swing, deep cavities can be conveniently processed. At the same time, it has the advantages of simple structure, convenient assembly and maintenance, and low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A structural diagram of the angle attachment head with a belt drive provided by the present invention;

[0017] Figure 2 A front view of the angle attachment head with a belt drive provided by the present invention;

[0018] Figure 3 A schematic diagram of the swing angle range that can be achieved by the angle attachment head with belt drive provided by the present invention.

[0019] In the figure: 1. housing, 11. spindle mounting part, 12. spindle accommodating space, 13. spindle mounting end, 14. angle measurement system accommodating chamber, 20. servo motor, 21. reducer, 22. driving wheel, 23. transmission belt, 24. driven wheel, 25. mounting plate, 30. spindle, 31. rotating shaft, 310. fixed plate, 32. bearing, 4. clamping device, 5. angle measurement system, 50. circular grating, 51. reading head. DETAILED DESCRIPTION

[0020] like Figure 1 and Figure 2The angle accessory head with drive disclosed in the present invention is shown, comprising a casing 1, a power mechanism, a transmission mechanism and a main shaft 30; the power mechanism and the transmission mechanism are placed in the casing 1; as shown in the figure, in this embodiment, the casing 1 is a narrow and long cavity structure, and a main shaft mounting portion 11 is provided at one end of the casing 1 (the lower end in the figure), and the main shaft mounting portion 11 deviates from the center position of the casing (that is, the main shaft mounting portion is arranged on the side of the lower end of the casing), and a main shaft accommodating space 12 in which the main shaft can be arranged is formed between the lower part of the casing and the main shaft mounting portion.

[0021] The power mechanism and the transmission mechanism are installed in the housing 1; specifically, the power mechanism includes a servo motor 20 and a reducer 21, the servo motor 20 is longitudinally arranged in the housing 1 (that is, the output shaft of the servo motor is consistent with the length direction of the housing), the output shaft of the servo motor 20 is connected to the input shaft of the reducer 21, and the input shaft of the reducer 21 is arranged perpendicular to the output shaft; the transmission mechanism includes a driving wheel 22, a transmission belt 23 and a driven wheel 23, and the output shaft of the reducer 21 is installed with the driving wheel 22; the spindle 30 is placed in the spindle accommodating space 12, and one side wall of the spindle 30 is fixed to one end of the rotating shaft 31. In this embodiment, a fixing plate 310 (flange structure) is provided at one end of the rotating shaft 31, and the spindle 30 is fixedly connected to the fixing plate 310 by bolts. A bearing mounting hole is provided on the spindle mounting portion 11, and a bearing 32 is installed on the rotating shaft 31. The bearing 32 is installed in the bearing mounting hole. A driven wheel 24 is installed at the other end of the rotating shaft 31, and the driving wheel 22 and the driven wheel 24 are connected by a transmission belt 23. The spindle is installed on the housing through the rotating shaft, so that the servo motor and the spindle are located on the same side of the transmission mechanism (that is, the spindle is located in the extended direction of the output shaft of the servo motor). The present invention arranges the servo motor longitudinally and drives the main shaft through a speed reducer and a belt transmission mechanism whose input shaft is perpendicular to the output shaft, so that the servo motor, the speed reducer and the main shaft are arranged approximately linearly, and the width of the swing shaft can be reduced, so that the main shaft is arranged in a narrow and long structure, which is convenient for extending into a deep cavity. At the same time, the servo motor can drive the main shaft to swing about the central axis of the rotating shaft through the speed reducer and the belt transmission structure, such as Figure 3 As shown, when the length of the spindle mounting portion is long enough, that is, the swing of the spindle does not interfere with the housing, the spindle can achieve a large angle of swing. The figure shows that the angle a of the accessory head can swing in both directions to 90 to 120 degrees, that is, the swing angle of the spindle can reach 180 to 240 degrees, and the swing of the spindle can cross the horizontal line and swing upward to an angle b of 30 degrees, which can conveniently process deep cavities. The transmission mechanism can adopt a friction belt drive (flat belt, V belt and other structures). In this embodiment, the transmission structure adopts a meshing belt drive (synchronous belt structure transmission). The use of a synchronous belt structure for transmission can ensure the accuracy of the transmission.

[0022] Furthermore, a clamping device 4 for clamping the spindle is installed on one side of the spindle mounting portion 11 provided with the driven wheel 24, and the clamping device 4 is placed between the spindle mounting portion 11 and the driven wheel 24. Preferably, the clamping device 4 is a pneumatic shaft clamping device, which is installed on the spindle mounting portion and sleeved on the rotating shaft. By providing the clamping device 4, the rotating shaft can be clamped and loosened, and then the spindle can be clamped and loosened, so that when the spindle rotates, the clamping device loosens the rotating shaft, and the spindle is controlled to swing through the transmission shaft. When the spindle swings a certain angle, the clamping device clamps and rotates, so that the spindle can be processed. In this embodiment, the pneumatic shaft clamping device can ensure that the accessory head is clean and free of hydraulic oil pollution.

[0023] Furthermore, a fixed disk 310 is provided at one end of the rotating shaft 31 connected to the spindle 30, and the rotating shaft 31 is fixedly connected to the spindle 30 through the fixed disk 310. The fixed disk 310 is installed with an angle measurement system 5 for measuring the spindle swing angle on the side facing the driven wheel 24. The angle measurement system 5 adopts a circular induction synchronizer. In this embodiment, the angle measurement system 5 includes a circular grating 50 and a reading head 51. The circular grating 50 is installed on the fixed disk 310, and the reading head 51 is installed on the spindle mounting portion 11. By setting up the angle measurement system, the spindle swing angle can be detected to achieve closed-loop control of the spindle, thereby improving the spindle swing accuracy. At the same time, since the circular grating is installed on the fixed disk (close to the bearing attachment), the rotation accuracy is high, and it is not affected by the spindle cutting force and the tension of the input end transmission belt. The spindle swing angle is directly measured, thereby improving the positioning accuracy.

[0024] Furthermore, the spindle mounting portion 11 is provided with an angle measurement system accommodating cavity 14 on one side facing the spindle 30, the reading head 51 is mounted on the inner wall of the angle measurement system accommodating cavity 14, the circular grating 50 is mounted on the fixed plate 310, and in the direction of the axis of the rotating shaft, part of the circular grating 50 is placed in the angle measurement system accommodating cavity 14. Since the angle measurement system accommodating cavity is provided, the angle measurement system can be placed therein, further reducing the width of the accessory head, and facilitating the processing of deep cavity structures.

[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An angle attachment head with a drive, used for deep cavity processing, comprising a housing (1), a power mechanism, a transmission mechanism and a spindle (30); the power mechanism and the transmission mechanism are placed in the housing (1); characterized in that: The power mechanism comprises a servo motor (20) and a reducer (21), the servo motor (20) being connected to the reducer (21), and the input shaft and output shaft of the reducer (21) being arranged perpendicularly; The transmission mechanism comprises a driving wheel (22), a transmission belt (23) and a driven wheel (24), and the driving wheel (22) is mounted on the output shaft of the reducer (21); The housing (1) is a long and narrow cavity structure, the power mechanism and the transmission mechanism are placed in the cavity, a spindle mounting portion (11) is provided at one end of the housing (1), and the spindle mounting portion (11) is offset from the center position of the housing (1), so that a spindle accommodating space (12) for arranging a spindle (30) is formed between the lower part of the housing (1) and the spindle mounting portion (11); The main shaft (30) is placed in the main shaft accommodating space (12); one side of the main shaft (30) is mounted on the main shaft mounting portion (11) of the housing (1) via a rotating shaft (31); the driven wheel (24) is mounted on the end of the rotating shaft (31) away from the main shaft; the driving wheel (22) and the driven wheel (24) are connected via the transmission belt (23); the main shaft (30) and the power mechanism are located on the same side of the transmission mechanism; the main shaft (30) is located in the direction of the extension line of the output shaft of the servo motor (20); and the servo motor (20), the reducer (21) and the main shaft (30) are arranged approximately linearly; The servo motor can drive the main shaft to swing about the central axis of the rotating shaft through the reducer and the transmission mechanism, and the swing angle of the main shaft reaches 180 degrees to 240 degrees; A fixed disk (310) is provided at one end of the rotating shaft (31) connected to the main shaft (30); the rotating shaft (31) is fixedly connected to the main shaft (30) via the fixed disk (310); and an angle measuring system (5) for measuring the swing angle of the main shaft is installed on a side of the fixed disk (310) facing the driven wheel (24); The angle measurement system (5) comprises a circular grating (50) and a reading head (51), wherein the circular grating (50) is mounted on the fixed disk (310), and the reading head (51) is mounted on the spindle mounting portion (11); An angle measurement system accommodating cavity (14) is also provided on a side of the spindle mounting portion (11) facing the spindle (30); the reading head (51) is mounted on the inner wall of the angle measurement system accommodating cavity (14); the circular grating is mounted on the fixed plate (310); and a portion of the circular grating is disposed in the angle measurement system accommodating cavity (14) in the axial direction of the rotating shaft.

2. The belt-driven angle attachment head according to claim 1, characterized in that: One end of the housing (1) is a main shaft mounting end (13), the main shaft mounting end (13) is provided with a main shaft mounting portion (11), the main shaft (30) is mounted on the main shaft mounting portion (11) via a rotating shaft (31), and the main shaft (30) and the driven wheel (24) are placed on both sides of the main shaft mounting portion (11).

3. The belt-driven angle attachment head according to claim 2, characterized in that: A clamping device for clamping the main shaft is installed on one side of the main shaft mounting portion (11) provided with the driven wheel (24); the clamping device is placed between the main shaft mounting portion (11) and the driven wheel (24).

4. The belt-driven angle attachment head according to claim 3, characterized in that: The clamping device is a pneumatic shaft clamping device.

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