A combined power seat with multiple shaft drive

Abstract

The present application relates to the technical field of combined power seat, and particularly discloses a combined power seat with multi-shaft transmission, which comprises a base provided with a dovetail-shaped sliding groove at the lower part and used for sliding assembly on a dovetail plate fixed to a machine tool bed; at least two groups of wedge-shaped locking blocks are arranged between the base and the dovetail plate and are spaced apart along the sliding direction, and each locking block is provided with an independent locking screw; a shell is located at the side of the base; a Y-axis running slide plate is connected between the base and the shell and comprises a slide plate body, a Y-direction guide rail and a Y-axis driving mechanism, which is used for driving the shell to make lifting movement relative to the base; the combined power seat with multi-shaft transmission adopts a helical gear pair for multi-shaft parallel transmission, the coincidence degree of the helical gear engagement is large, the transmission is stable, the noise is low, the transmission gap can be effectively reduced, and the synchronization accuracy between the output shafts is improved.

Description

Technical Field

[0001] This invention relates to the field of combined power base technology, and more specifically to a combined power base with multi-shaft transmission. Background Technology

[0002] A servo motor is a power motor used in servo systems to control the operation of mechanical components. It is an auxiliary motor with indirect speed control, capable of precisely controlling speed and achieving highly accurate positioning. It converts voltage signals into torque and speed to drive the controlled object. The rotor speed is controlled by the input signal and can respond quickly. As an actuator in automatic control systems, it has advantages such as a small electromechanical time constant and high linearity. Servo motors are widely used in various electromechanical equipment. A well-structured and high-precision power mount is required to fully utilize the servo motor's performance, enabling multi-axis, multi-coordinate spindle drive combination power mounts to produce more precise and complex products in CNC machine tool processing.

[0003] Existing multi-spindle drive power units mostly only support the arrangement of output shafts in the same direction. For complex workpieces that need to complete machining tasks in different coordinate directions (such as X and Z directions) at the same time, multiple independent power heads or multiple clamping operations are often required, which not only increases equipment costs but also reduces machining efficiency and accuracy. Summary of the Invention

[0004] This invention provides a combined power base with multiple shaft drives, which aims to solve the problem in related technologies that only support the arrangement of output shafts in the same direction.

[0005] The multi-shaft drive combined power base of the present invention includes: The base has a dovetail-shaped groove at its lower part for sliding assembly on a dovetail plate fixed to the machine tool bed; at least two sets of wedge-shaped locking blocks are provided between the base and the dovetail plate, which are spaced apart along the sliding direction, and each locking block is provided with an independent locking screw. The housing is located to the side of the base; A Y-axis running slide plate is connected between the base and the housing, including a slide plate body, a Y-axis guide rail and a Y-axis drive mechanism, used to drive the housing to move up and down relative to the base; The drive motor is fixedly mounted on the housing; A drive shaft assembly, disposed within the housing, comprises multiple parallel drive shafts with equal spacing between adjacent shafts; the drive motor engages with each of the drive shafts via a helical gear pair to drive the multiple drive shafts to rotate synchronously. The output shaft assembly includes at least one X-axis output shaft unit and at least one Z-axis output shaft unit; each of the output shaft units is mounted on the front side of the housing in a modular manner that allows for independent detachment. The output shaft axis of the X-axis output shaft unit is parallel to the axis of the transmission shaft, and its input end is directly connected to the corresponding transmission shaft through a coupling. The output shaft axis of the Z-axis output shaft unit is perpendicular to the axis of the transmission shaft, and its input end is connected to the corresponding transmission shaft through a bevel gear set.

[0006] Preferably, the Y-axis running slide includes: Two parallel Y-guide rails are fixedly installed on the side of the base; The slide body is slidably engaged with the Y-guide rail by a slider; A ball screw assembly, wherein the two ends of the screw are supported on the base by bearings, and the nut is fixedly connected to the slide body; The Y-axis servo motor is connected to one end of the lead screw and is also connected to the CNC system signal.

[0007] Preferably, the bevel angle of the locking block is consistent with the bevel angle of the dovetail plate, and the locking screw passes through the waist-shaped adjustment hole opened on the locking block and is threadedly connected to the base.

[0008] Preferably, the housing has stepped mounting holes at the positions corresponding to each of the output shaft units as modular mounting interfaces, and the mounting holes are provided with positioning stops and sealing grooves.

[0009] Preferably, the bevel gear set includes a first bevel gear and a second bevel gear that mesh with each other. The first bevel gear is installed at the end of the drive shaft, and the second bevel gear is installed at the input end of the Z-axis output shaft, for transmitting the rotational motion of the drive shaft to the Z-axis output shaft.

[0010] Preferably, both ends of the drive shaft are supported in the housing by angular contact ball bearings, and each end of the drive shaft is provided with a preload nut for adjusting the bearing preload.

[0011] Preferably, both the X-axis output shaft and the Z-axis output shaft are provided with tool clamping interfaces at their front ends.

[0012] Preferably, the helix angle of the helical gear pair is 15°~35°.

[0013] Beneficial effects: 1. When in use, this invention uses a helical gear pair for multi-axis parallel transmission. The helical gear meshing has a large overlap, smooth transmission, and low noise. It can effectively reduce transmission clearance and improve the synchronization accuracy between output shafts. Moreover, the helix angle of the helical gear pair is designed within the range of 15° to 35°, which takes into account both transmission smoothness and axial force balance.

[0014] 2. When in use, this invention directly drives the X-axis output shaft through a coupling and drives the Z-axis output shaft through a bevel gear set, so as to simultaneously output machining power in two mutually perpendicular directions on the same power base. Combined with the Y-axis lifting motion, it can complete composite machining in three coordinate directions, reduce the number of workpiece clamping times, and improve machining accuracy and efficiency.

[0015] 3. When using this invention, each output shaft unit adopts a modular design and can be detachably installed on the housing through standardized mounting flanges and modular mounting interfaces. The number, type and arrangement of output shafts can be flexibly selected according to processing requirements without replacing the overall power base.

[0016] 4. In use, the base is slidably assembled onto the dovetail plate through the dovetail mounting structure. The position of the base can be adjusted by loosening the locking screw. After it is in place, tightening the screw will achieve reliable locking through the wedge locking block. This structure has good positioning and is easy to reinstall, without the need for secondary dimension calibration. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention.

[0018] Figure 2 This is a perspective view of the invention from another angle.

[0019] Figure 3 This is a side view of the present invention.

[0020] Figure 4 This is a perspective view of the drive motor and transmission shaft assembly of the present invention.

[0021] Figure 5 This is a perspective view of the Z-axis output shaft unit and bevel gear set of the present invention.

[0022] Figure label: 1. Base; 2. Housing; 3. Drive motor; 4. Transmission shaft assembly; 41. Helical gear pair; 5. Output shaft assembly; 51. X-axis output shaft unit; 52. Z-axis output shaft unit; 6. Y-axis running slide; 61. Slide body; 62. Y-axis guide rail; 63. Ball screw pair; 64. Y-axis servo motor; 7. Dovetail plate; 8. Locking block; 9. Bevel gear set; 10. Coupling; 11. Tool clamping interface. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] Example 1 like Figures 1 to 5As shown, the multi-shaft drive combined power seat of the present invention includes a base 1, a housing 2, a drive motor 3, and an output shaft assembly 5.

[0025] refer to Figure 1 and Figure 2 The base 1 has a dovetail-shaped groove at its lower part, which slides onto the dovetail plate 7 fixed to the machine tool bed. At least two sets of wedge-shaped locking blocks 8 are spaced apart along the sliding direction between the base 1 and the dovetail plate 7, each locking block 8 having its own independent locking screw. The angle of the inclined surface of the locking block 8 is the same as the angle of the dovetail inclined surface of the dovetail plate 7, and the locking screw passes through a waist-shaped adjustment hole on the locking block 8 and is threaded into the base 1. When the base 1 needs to be moved, the locking screw is loosened, and the base 1 can slide freely along the dovetail plate 7; after it is in place, the locking screw is tightened, and the locking block 8 is wedge-locked along the dovetail inclined surface, reliably locking the base 1 onto the dovetail plate 7. The distributed arrangement of at least two sets of locking blocks 8 ensures uniform distribution of locking force and reliable locking.

[0026] refer to Figure 2 and Figure 3 The housing 2 is located to the side of the base 1, and a Y-axis running slide 6 is provided between the housing 2 and the base 1. The Y-axis running slide 6 includes a slide body 61, two parallel Y-axis guide rails 62, and a ball screw assembly 63. The Y-axis guide rails 62 are fixedly installed on the side of the base 1, and the slide body 61 slides in contact with the Y-axis guide rails 62 via a slider. The two ends of the ball screw assembly 63 are supported on the base 1 by bearings, and one end is connected to the Y-axis servo motor 64 for transmission; the nut of the ball screw assembly 63 is fixedly connected to the slide body 61. The Y-axis servo motor 64 drives the ball screw assembly 63 to rotate, causing the slide body 61 and the housing 2 fixedly connected to it to move up and down along the Y-axis guide rails 62. The Y-axis servo motor 64 is connected to the CNC system signal and can precisely control the lifting position and speed of the housing 2 according to the machining instructions.

[0027] refer to Figure 1 The drive motor 3 is fixedly mounted on the back side of the housing 2 (the side away from the output shaft). It is a servo motor and is connected to the CNC system signal. The output shaft of the drive motor 3 extends into the housing 2 and is connected to the transmission shaft assembly 4 located inside the housing 2.

[0028] refer to Figure 4 The transmission shaft assembly 4 consists of multiple transmission shafts arranged in parallel with equal spacing between adjacent shafts. The drive motor 3 engages with each transmission shaft via helical gear pairs 41, with a helix angle of 25°. This allows the drive motor 3 to drive the multiple transmission shafts to rotate synchronously.

[0029] Both ends of the drive shaft are supported in the housing 2 by angular contact ball bearings, and each end of the drive shaft is provided with a preload nut to adjust the preload of the bearing, eliminate axial movement, and ensure transmission accuracy.

[0030] refer to Figures 1-4 The output shaft assembly 5 includes two X-axis output shaft units 51 and two Z-axis output shaft units 52. Each output shaft unit is installed on the front side of the housing 2 (the side away from the base 1) in a modular manner that can be independently detached. The housing 2 has stepped mounting holes corresponding to the positions of each output shaft unit as modular mounting interfaces, and the mounting holes are provided with positioning stops and sealing grooves.

[0031] The output shaft axis of the X-axis output shaft unit 51 is parallel to the transmission shaft axis of the transmission shaft group 4 (i.e., in the X-axis direction), and its input end is directly connected to the corresponding transmission shaft in the transmission shaft group 4 via the coupling 10. This allows the rotational motion of the transmission shaft to be directly transmitted to the X-axis output shaft via the coupling 10, driving the tool mounted at its front end to rotate and perform machining in the X-axis direction.

[0032] refer to Figure 5 The output shaft axis of the Z-axis output shaft unit 52 is perpendicular to the transmission shaft axis of the transmission shaft group 4 (i.e., in the Z-axis direction). Its input end is connected to the corresponding transmission shaft in the transmission shaft group 4 via a bevel gear set 9. The bevel gear set 9 includes a first bevel gear and a second bevel gear that mesh with each other. The first bevel gear is installed at the end of the transmission shaft, and the second bevel gear is installed at the input end of the Z-axis output shaft. The rotational motion of the transmission shaft is transmitted to the Z-axis output shaft after being reversed by 90° by the bevel gear set 9, driving the tool to rotate and perform machining in the Z-axis direction.

[0033] Both the X-axis and Z-axis output shafts are equipped with tool clamping interfaces 11 at their front ends. In this embodiment, a standard ER25 chuck interface is used, which allows for quick replacement of different specifications of milling cutters, drills, taps, and other tools according to machining requirements.

[0034] Example 2 The main difference between this embodiment and Embodiment 1 lies in the configuration of the output shaft units. Depending on the specific requirements of the workpiece being processed, the user can choose to install different numbers and different axial directions of output shaft units on the housing 2. For example, for simple workpieces requiring only X-axis multi-axis machining, only multiple X-axis output shaft units 51 can be installed, without installing Z-axis output shaft units 52; for complex workpieces requiring simultaneous X-axis and Z-axis machining, the number and layout of X-axis and Z-axis output shaft units can be configured as needed. The standardized design of the modular installation interface makes this configuration adjustment extremely convenient, requiring no modification to the housing 2 itself.

[0035] Example 3 The difference between this embodiment and Embodiment 1 lies in the driving method of the Y-axis lifting mechanism. Considering the differences in the requirements of different machine tools for Y-axis travel and load capacity, this embodiment adopts a synchronous drive method with two ball screw pairs. The two ball screw pairs are respectively set on both sides of the Y-axis running slide plate 6 and are synchronously driven by two Y-axis servo motors, which can provide greater driving force and higher lifting stability, and is suitable for large power seats with heavy housing 2 and drive motor 3. The two Y-axis servo motors are electronically synchronously controlled through a CNC system to ensure that the movement of the two screws remains strictly synchronized and to avoid jamming.

[0036] Working principle: The drive motor 3 receives instructions from the CNC system and rotates. Its power is transmitted to the transmission shaft group 4 through the helical gear pair 41. Part of the transmission shaft in the transmission shaft group 4 is directly connected to the X-axis output shaft unit 51 through the coupling 10, directly transmitting the rotational power to the X-axis tool for X-axis machining such as drilling and milling. The other part of the transmission shaft is connected to the Z-axis output shaft unit 52 through the bevel gear pair 9, transmitting the rotational power to the Z-axis tool after reversal for Z-axis machining such as side milling. The CNC system controls the Y-axis servo motor 64 to drive the ball screw pair 63, which drives the entire housing 2 to make precise lifting and lowering movements along the Y-axis guide rail 62 to achieve vertical machining feed. When it is necessary to adjust the horizontal position of the power seat on the machine tool bed, loosen multiple independent locking screws, and the base 1 can slide along the dovetail plate 7. After it is in place, tighten the screws, and the wedge locking block 8 uses the inclined self-locking principle to reliably lock the base 1, achieving horizontal positioning.

[0037] This invention employs a helical gear pair 41 for multi-axis parallel transmission. The helical gears offer high overlap, smooth transmission, and low noise, effectively reducing transmission backlash and improving synchronization accuracy between output shafts. Furthermore, the helix angle of the helical gear pair 41 is designed within the range of 15° to 35°, balancing transmission smoothness and axial force balance. The X-axis output shaft is directly driven via coupling 10, while the Z-axis output shaft is driven via bevel gear set 9, enabling simultaneous output of machining power in two mutually perpendicular directions from the same power source. Combined with the Y-axis lifting motion, composite machining in three coordinate directions can be achieved. This design reduces the number of workpiece clamping operations, improving machining accuracy and efficiency. Each output shaft unit adopts a modular design and can be detachably installed on the housing 2 via standardized mounting flanges and modular mounting interfaces. The number, type, and arrangement of output shafts can be flexibly selected according to machining requirements without replacing the overall power base. The base is slidably assembled on the dovetail plate 7 via a dovetail mounting structure. The position of the base can be adjusted by loosening the locking screws, and after it is in place, the screws can be tightened to achieve reliable locking through the wedge locking block 8. This structure has good positioning accuracy, is easy to reinstall, and does not require secondary dimensional calibration.

[0038] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A combined power base with multiple shaft drives, characterized in that, include: The base (1) has a dovetail-shaped groove at its lower part for sliding assembly on the dovetail plate (7) fixed to the machine tool bed; at least two sets of wedge-shaped locking blocks (8) are arranged at intervals along the sliding direction between the base (1) and the dovetail plate (7), and each locking block (8) is provided with an independent locking screw. The housing (2) is located to the side of the base (1); Y-axis running slide (6) is connected between the base (1) and the housing (2), including slide body (61), Y guide rail (62) and Y-axis drive mechanism, for driving the housing (2) to move up and down relative to the base (1); The drive motor (3) is fixedly mounted on the housing (2); The drive shaft assembly (4) is located inside the housing (2) and consists of multiple drive shafts that are parallel to each other and have equal spacing between adjacent shafts; the drive motor (3) meshes with each of the drive shafts through a helical gear pair (41) to drive the multiple drive shafts to rotate synchronously. The output shaft assembly (5) includes at least one X-axis output shaft unit (51) and at least one Z-axis output shaft unit (52); each of the output shaft units is mounted on the front side of the housing (2) in a modular manner that can be independently detached; The output shaft axis of the X-axis output shaft unit (51) is parallel to the axis of the transmission shaft, and its input end is directly connected to the corresponding transmission shaft through a coupling (10). The output shaft axis of the Z-axis output shaft unit (52) is perpendicular to the axis of the transmission shaft, and its input end is connected to the corresponding transmission shaft through a bevel gear set (9).

2. The combined power base with multiple shaft drives according to claim 1, characterized in that, The Y-axis running slide (6) includes: Two parallel Y-guide rails (62) are fixedly installed on the side of the base (1); The slide body (61) is slidably engaged with the Y-guide rail (62) by the slider; The ball screw assembly (63) has its two ends supported on the base (1) by bearings, and its nut is fixedly connected to the slide body (61); The Y-axis servo motor (64) is connected to one end of the lead screw and is also connected to the CNC system signal.

3. The combined power base with multiple shaft drives according to claim 2, characterized in that, The angle of the inclined surface of the locking block (8) is consistent with the angle of the dovetail inclined surface of the dovetail plate (7), and the locking screw passes through the waist-shaped adjustment hole opened on the locking block (8) and is threadedly connected to the base (1).

4. The combined power base with multiple shaft drives according to claim 1, characterized in that, The housing (2) has stepped mounting holes at the positions corresponding to each of the output shaft units as modular mounting interfaces, and the mounting holes are provided with positioning stops and sealing grooves.

5. The combined power base with multiple shaft drives according to claim 1, characterized in that, The bevel gear set (9) includes a first bevel gear and a second bevel gear that mesh with each other. The first bevel gear is installed at the end of the transmission shaft, and the second bevel gear is installed at the input end of the Z-axis output shaft, for transmitting the rotational motion of the transmission shaft to the Z-axis output shaft.

6. The combined power base with multiple shaft drives according to claim 1, characterized in that, Both ends of the drive shaft are supported in the housing (2) by angular contact ball bearings, and each end of the drive shaft is provided with a preload nut for adjusting the bearing preload.

7. The combined power base with multiple shaft drives according to claim 1, characterized in that, Both the X-axis output shaft and the Z-axis output shaft are provided with tool clamping interfaces (11) at their front ends.

8. The combined power base with multiple shaft drives according to claim 1, characterized in that, The helix angle of the helical gear pair (41) is 15°~35°.

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