Tool holder braking structure of numerical control gear cutting machine

Abstract

The utility model discloses a tool holder brake structure of numerical control gear cutting machine, including the swing plate for installing the rotary chuck of tool, swing the plate rotation setting is in the carrier, be equipped with brake mechanism between carrier with swing the plate, and brake mechanism includes the pressing block and drive pressing block forward and backward movement's brake driver, be equipped with arc guide groove around its rotation center line on swing the plate, and pressing block and brake driver set up respectively in swing the plate's two sides, and brake driver sets up on the carrier, and passes through arc guide groove and is transmission connection with pressing block, and pressing block presses tightly swing the plate when brake. The utility model discloses through the pressing block direct action on swing the plate and realizes brake, makes swing the plate and stop reliable, and promotes the machining accuracy.

Description

Technical Field

[0001] This utility model relates to a CNC gear turning machine, and more particularly to a tool holder braking structure for a CNC gear turning machine. Background Technology

[0002] Chinese Patent Publication No. CN218335356U, published on January 17, 2023, discloses a novel gear turning machine, comprising a machine body with a workpiece turntable, a B-axis gear cutting tool device, an X-axis moving mechanism for driving the workpiece turntable, a Z-axis moving mechanism for driving the B-axis gear cutting tool device vertically, a Y-axis moving mechanism for driving the Z-axis moving mechanism horizontally, and an A-axis rotating mechanism for driving the B-axis gear cutting tool device to rotate relative to the Z-axis moving mechanism. The A-axis rotating mechanism in this structure achieves angle locking through a self-locking drive gear (worm gear mechanism). However, due to the backlash between the gears, the gear cutting tool operates unstably, affecting machining accuracy. Utility Model Content

[0003] The purpose of this utility model is to provide a tool holder braking structure for a CNC gear turning machine that has a reasonable structure and reliable stopping capability.

[0004] The purpose of this utility model is achieved as follows: A tool holder braking structure for a CNC gear turning machine includes a swing disk for mounting a tool chuck. The swing disk is rotatably mounted on a carrier. A braking mechanism is provided between the carrier and the swing disk. The braking mechanism includes a pressure block and a brake actuator for driving the pressure block to move back and forth. An arc-shaped guide groove is provided on the swing disk around its rotation center line. The pressure block and the brake actuator are respectively provided on the front and rear sides of the swing disk. The brake actuator is mounted on the carrier and passes through the arc-shaped guide groove to be connected to the pressure block for transmission. The pressure block brakes when it presses against the swing disk.

[0005] The objective of this utility model can also be achieved by the following technical measures: As a more specific embodiment, the inner wall of the arc-shaped guide groove is provided with a stepped surface or a conical surface that is wider at the front and narrower at the back. The pressure block is set in the arc-shaped guide groove. The brake actuator is a hydraulic cylinder, which is set on the rear side of the carrier. The piston rod of the hydraulic cylinder passes through the arc-shaped guide groove and is connected to the pressure block for transmission. The pressure block presses against the stepped surface or conical surface of the arc-shaped guide groove to achieve braking.

[0006] As a further embodiment, the braking mechanism is provided in a set, and the braking mechanism is located in the middle of the arc-shaped guide groove.

[0007] As a further solution, the braking mechanism is provided in two sets, which are symmetrically distributed on the left and right sides of the arc-shaped guide groove, resulting in higher braking stability.

[0008] As a further embodiment, the swing disk is fan-shaped, and the lower end of the swing disk is rotatably engaged with the lower end of the carrier via a rotating shaft. The upper outer circumference of the swing disk is provided with an arc-shaped toothed surface. The carrier is provided with a swing angle control servo motor and a drive gear. The swing angle control servo motor is connected to the drive gear, and the drive gear meshes with the arc-shaped toothed surface.

[0009] As a further embodiment, the side of the swing disk opposite to the carrier is provided with a rear smooth arc-shaped contact surface and a front smooth arc-shaped contact surface respectively corresponding to the rear end of the arc-shaped guide groove.

[0010] As a further embodiment, the oscillating disk and the carrier are respectively provided with a rear smooth annular contact surface and a front smooth annular contact surface on the opposite side of the rotating shaft.

[0011] As a further embodiment, the rear end of the rotating shaft extends towards the rear side of the carrier, and a brake disc is also provided at the rear end of the rotating shaft. Damping brakes are provided on both sides of the carrier corresponding to the front and rear sides of the brake disc. The combination of the damping brakes and the braking mechanism results in better braking performance.

[0012] The beneficial effects of this utility model are as follows: (1) This utility model achieves braking by directly applying pressure to the swing plate, making the swing plate stop reliably and improving the processing accuracy.

[0013] (2) The oscillating disk and the carrier on opposite sides of the present invention are respectively connected by a smooth surface contact structure, which can improve the relative stability between the oscillating disk and the carrier and the stability after braking. Attached Figure Description

[0014] Figure 1 This is an exploded structural diagram of an embodiment of the present invention.

[0015] Figure 2 for Figure 1 Another structural diagram from a different angle.

[0016] Figure 3 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 4 This is a side view of the structure of this utility model.

[0018] Figure 5 for Figure 4 Schematic diagram of the BB cross-section structure.

[0019] Figure 6 This is a cross-sectional structural diagram of another embodiment of the present invention. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments: See Figures 1-5 As shown, a tool holder braking structure for a CNC gear turning machine includes a swing disk 4 for mounting a tool rotating chuck 6. The swing disk 4 is rotatably mounted on a carrier 3. A braking mechanism is provided between the carrier 3 and the swing disk 4. The braking mechanism includes a pressure block 71 and a brake actuator for driving the pressure block 71 to move back and forth. An arc-shaped guide groove 44 is provided on the swing disk 4 around its rotation center line. The pressure block 71 and the brake actuator are respectively provided on the front and rear sides of the swing disk 4. The brake actuator is mounted on the carrier 3 and passes through the arc-shaped guide groove 44 to be connected to the pressure block 71 in a transmission manner. The pressure block 71 brakes when it presses against the swing disk 4.

[0021] The inner wall of the arc-shaped guide groove 44 is provided with a stepped surface 441 or a conical surface that is wider at the front and narrower at the back. The pressure block 71 is disposed in the arc-shaped guide groove 44. The brake actuator is a hydraulic cylinder 7, which is disposed on the rear side of the carrier 3. The piston rod of the hydraulic cylinder 7 passes through the arc-shaped guide groove 44 and is connected to the pressure block 71 in a transmission manner. The pressure block 71 presses against the stepped surface 441 or the conical surface of the arc-shaped guide groove 44 to achieve braking.

[0022] The braking mechanism is provided in two sets, symmetrically distributed on the left and right sides of the arc-shaped guide groove 44. Alternatively, the braking mechanism is provided in one set, located in the middle of the arc-shaped guide groove 44, in conjunction with... Figure 6 As shown.

[0023] The swing disk 4 is fan-shaped, and the lower end of the swing disk 4 is rotatably engaged with the lower end of the carrier 3 through a rotating shaft 42. The upper outer periphery of the swing disk 4 is provided with an arc-shaped tooth surface 41. The carrier 3 is provided with a swing angle control servo motor 2 and a drive gear 21. The swing angle control servo motor 2 and the drive gear 21 are connected in transmission, and the drive gear 21 meshes with the arc-shaped tooth surface 41.

[0024] The side of the swing disk 4 opposite to the carrier 3 is provided with a rear smooth arc-shaped contact surface 45 and a front smooth arc-shaped contact surface 31 respectively corresponding to the rear end of the arc-shaped guide groove 44.

[0025] The swing disk 4 and the carrier 3 are respectively provided with a rear smooth annular contact surface 46 and a front smooth annular contact surface 32 on the outer periphery of the rotating shaft 42.

[0026] The rear end of the rotating shaft 42 extends toward the rear side of the carrier 3. The rear end of the rotating shaft 42 is also provided with a brake disc 43. Damping brakes 47 are provided on the front and rear sides of the carrier 3 corresponding to the brake disc 43.

[0027] The tool rotating chuck 6 is connected to the swing disk 4 via a tool holder assembly. The tool holder assembly includes a longitudinal slide plate 5. The swing disk 4 is rotatably mounted on a carrier 3. The carrier 3 is provided with an A-axis drive mechanism to control the swing disk 4 to swing left and right. The tool rotating chuck 6 is provided with a seat sleeve 61, which is mounted on the longitudinal slide plate 5. The seat sleeve 61 is provided with a chuck drive mechanism. The swing disk 4 is provided with a Y-axis moving mechanism for driving the longitudinal slide plate 5 to move longitudinally. The tool rotating chuck 6 is provided with a tool clamping part D.

[0028] The swing angle of the swing disk 4 is within 17.5 degrees.

[0029] The tool clamping part D is close to the rotation center line A of the swing disk 4.

[0030] The longitudinal slide plate 5 is longitudinally slidably mounted on the swing disk 4. The Y-axis moving mechanism includes a longitudinal control screw transmission pair 54, which is connected between the swing disk 4 and the longitudinal slide plate 5 and controls the longitudinal movement of the longitudinal slide plate 5.

[0031] The Y-axis moving mechanism also includes a support plate 51, a longitudinal linear guide rail 52, and a longitudinal slider 53. The support plate 51 is disposed on the swing disk 4. The longitudinal linear guide rail 52 and the longitudinal slider 53 slide against each other and are respectively connected to the support plate 51 and the longitudinal slide plate 5. The longitudinal control screw transmission pair 54 is connected between the support plate 51 and the longitudinal slide plate 5. The support plate 51 and the longitudinal slide plate 5 are located above the rotation center line A of the swing disk 4.

[0032] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A tool holder braking structure for a CNC gear turning machine, comprising a swing disk (4) for mounting a tool chuck (6), the swing disk (4) being rotatably mounted on a carrier (3), characterized in that: A braking mechanism is provided between the carrier (3) and the swing disk (4). The braking mechanism includes a pressure block (71) and a brake driver that drives the pressure block (71) to move back and forth. An arc-shaped guide groove (44) is provided on the swing disk (4) around its rotation center line. The pressure block (71) and the brake driver are respectively arranged on the front and rear sides of the swing disk (4). The brake driver is arranged on the carrier (3) and passes through the arc-shaped guide groove (44) to be connected to the pressure block (71) in a transmission manner. The pressure block (71) brakes when it presses the swing disk (4).

2. The tool holder braking structure of the CNC gear turning machine according to claim 1, characterized in that: The inner wall of the arc-shaped guide groove (44) is provided with a stepped surface (441) or a conical surface that is wider at the front and narrower at the back. The pressure block (71) is set in the arc-shaped guide groove (44). The brake actuator is a hydraulic cylinder (7). The hydraulic cylinder (7) is set on the rear side of the carrier (3). The piston rod of the hydraulic cylinder (7) passes through the arc-shaped guide groove (44) and is connected to the pressure block (71) in a transmission connection. The pressure block (71) presses against the stepped surface (441) or conical surface of the arc-shaped guide groove (44) to achieve braking.

3. The tool holder braking structure of the CNC gear turning machine according to claim 1, characterized in that: The braking mechanism is provided in a set and is located in the middle of the arc-shaped guide groove (44).

4. The tool holder braking structure of the CNC gear turning machine according to claim 1, characterized in that: The braking mechanism is provided in two sets, which are symmetrically distributed on the left and right sides of the arc-shaped guide groove (44).

5. The tool holder braking structure of the CNC gear turning machine according to claim 1, characterized in that: The swing disk (4) is fan-shaped. The lower end of the swing disk (4) is rotatably engaged with the lower end of the carrier (3) through a rotating shaft (42). The upper outer periphery of the swing disk (4) is provided with an arc-shaped tooth surface (41). The carrier (3) is provided with a swing angle control servo motor (2) and a drive gear (21). The swing angle control servo motor (2) is connected to the drive gear (21) in a transmission connection. The drive gear (21) meshes with the arc-shaped tooth surface (41).

6. The tool holder braking structure of the CNC gear turning machine according to claim 5, characterized in that: The swing disk (4) is provided with a rear smooth arc-shaped contact surface (45) and a front smooth arc-shaped contact surface (31) on the side opposite to the carrier (3) and the rear end of the arc-shaped guide groove (44).

7. The tool holder braking structure of the CNC gear turning machine according to claim 5, characterized in that: The swing disk (4) and the carrier (3) are respectively provided with a rear smooth annular contact surface (46) and a front smooth annular contact surface (32) on the opposite side of the rotating shaft (42).

8. The tool holder braking structure of the CNC gear turning machine according to claim 5, characterized in that: The rear end of the shaft (42) extends toward the rear side of the carrier (3), and the rear end of the shaft (42) is also provided with a brake disc (43). Damping brakes (47) are provided on the front and rear sides of the carrier (3) corresponding to the brake disc (43).

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