CN113172463A

CN113172463A - Driving device for table placement

Info

Publication number: CN113172463A
Application number: CN202110008505.2A
Authority: CN
Inventors: 李文龙; 梁涛
Original assignee: Ningbo Dema Intelligent Machinery Co Ltd
Current assignee: Ningbo Dema Intelligent Machinery Co Ltd
Priority date: 2021-01-05
Filing date: 2021-01-05
Publication date: 2021-07-27

Abstract

The invention discloses a swing table driving device which comprises a horizontal linear driving device, a moving seat, a horizontal sliding block, a horizontal linear guide rail, a vertical sliding block, a swing table, a supporting seat and a base, wherein the moving seat is arranged on the horizontal linear driving device; the movable seat is connected with the horizontal linear guide rail in a sliding mode through a horizontal sliding block and is in driving connection with the horizontal linear driving device, two ends of the swing table are rotatably supported by the supporting seat, and the supporting shaft is perpendicular to the horizontal linear guide rail; the vertical linear guide rail is arranged on the movable seat, the vertical sliding block is connected with the vertical linear guide rail in a sliding mode, the vertical sliding block is hinged with the swing table, and the connection position is not located on the section, in the long axis direction, of the swing table supporting shaft. The invention effectively avoids the inherent problems of complex displacement relation between the mechanism driving dead angle and the moving part and even position non-unique determination in the prior connecting rod type technology, and has the advantages of driving stroke section, high swing response speed and the like compared with the prior art.

Description

Driving device for table placement

Technical Field

The invention belongs to the technical field of hub machining equipment, and particularly relates to a swing table driving device.

Background

At present, a swing table used for a five-axis machining center generally adopts a motor connected with a worm, and drives the swing table to rotate through meshing with a turbine, or adopts a mode of direct drive of the motor to enable the swing table to swing. The traditional mode has the problems of large torsion moment born by the swing table shaft, large motor power and high manufacturing cost.

In the prior art: patent publication No. CN203484917U discloses a screw pair driving type swing turntable, wherein a screw and a nut form a screw pair; the servo motor C is arranged on the speed reducing device A, the speed reducing device A is arranged on a connecting seat, the connecting seat is arranged on a support through an H bearing and a J bearing, and one end of a lead screw is arranged in the connecting seat through a lead screw bearing and is connected with an output shaft of the speed reducing device A; the nut is fixedly arranged on the nut seat, the nut seat is arranged on the swing rod through an F bearing and a G bearing, and the swing rod is fixedly arranged on the swing frame; when the servo motor C rotates, the speed reducer A drives the lead screw to rotate, the lead screw drives the nut to move, the nut drives the swing rod to move, and the swing rod drives the swing frame to move. Although the technical scheme solves the problems of large torsion moment of the swing table shaft and large power of the motor, the swing table shaft has dead angles of driving force, large occupied space, small swing angle range, unstable angle control and low precision.

In the prior art: patent publication No. CN204061781U discloses a linear drive pivot angle device, the pivot angle device include the mount, it has swing mechanism to articulate on the mount, the last fixed swinging arms that is provided with of swing mechanism, the one end of swinging arms and driving motor's shell fixed connection, driving motor passes through the shaft coupling and drives the lead screw rotation, the screw has been cup jointed to the lower part of lead screw, the screw is provided with the screw seat outward, the pivot that the screw seat set up through two symmetries is articulated with the fixed arm, and the fixed arm then is with mount fixed connection, still be provided with the angle encoder who matches with swing mechanism on the mount. The linear driving swing angle device can convert linear motion into swing and can accurately control the swing angle. Although the technical scheme converts the linear motion into the swing, the angle encoder is required to be matched in the swing process, and the angle control is unstable.

The present invention has been made in view of this situation.

Disclosure of Invention

The technical problem to be solved by the present invention is to overcome the defects of the prior art, and to solve the technical problem, the present invention adopts the following basic concept:

a swing table driving device comprises a horizontal linear driving device, a moving seat, a horizontal sliding block, a horizontal linear guide rail, a vertical sliding block, a swing table, a supporting seat and a base;

the horizontal linear driving device, the horizontal linear guide rail and the supporting seat are all arranged on the base, the moving seat is connected with the horizontal linear guide rail in a sliding mode through a horizontal sliding block and is connected with the horizontal linear driving device in a driving mode, two ends of the swing table are rotatably supported by the supporting seat, and the supporting shaft is perpendicular to the horizontal linear guide rail;

the vertical linear guide rail is arranged on the movable seat, the vertical sliding block is connected with the vertical linear guide rail in a sliding mode, the vertical sliding block is hinged with the swing table, and the connection position is not located on the section, in the long axis direction, of the swing table supporting shaft.

Furthermore, a rotary table is arranged in the swing table.

Further, the horizontal linear driving device is a screw-nut pair linear driving device, an oil cylinder linear driving device, an air cylinder linear driving device, a linear motor driving device or other driving modes.

Furthermore, the horizontal linear driving device is a screw-nut pair linear driving device and mainly comprises a servo motor, a motor base, a screw rod and a screw nut, wherein the servo motor is installed on the base through the motor base, the servo motor is connected with the screw rod in a driving mode, the screw nut is connected with the horizontal sliding block, and the screw rod is matched with the screw nut.

After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.

The invention drives the moving seat through the horizontal linear driving device to drive the swing platform to swing, has smaller driving stroke than the prior art, has the same motor rotating speed and lead of the screw rod, has higher swing response speed, effectively avoids the inherent problems of complex displacement relation between mechanism driving dead angles and moving parts and even position incapability of being uniquely determined in the prior connecting rod type technology, has low driving energy consumption, high function conversion efficiency and saves cost.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention to its proper form. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic view of the overall structure of an embodiment of the present invention,

FIG. 2 is a schematic diagram illustrating the swing of the swing platform to the right according to an embodiment of the present invention;

FIG. 3 is a schematic horizontal position diagram of a platform according to an embodiment of the present invention;

FIG. 4 is a schematic diagram illustrating the swing of the swing table to the left according to an embodiment of the present invention;

FIG. 5 is a mechanical schematic of the present invention;

fig. 6 is a mechanical schematic diagram of a comparative example.

In the figure: 1-a horizontal linear drive; 2-a movable seat; 3-horizontal sliding block; 4-horizontal linear guide rail; 5-vertical linear guide rail; 6-vertical slide block; 7-placing a table; 8-a turntable; 9-a supporting seat; 10-a base;

it should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

Referring to fig. 1 to 5, the swing table driving device according to the present embodiment includes a horizontal linear driving device 1, a movable base 2, a horizontal slider 3, a horizontal linear guide 4, a vertical linear guide 5, a vertical slider 6, a swing table 7, a rotary table 8, a supporting base 9, and a base 10, the base 10 is provided with a horizontal linear driving device 1, the output end of the horizontal linear driving device 1 is fixedly connected with a movable base 2, the lower part of the movable base 2 is provided with a horizontal sliding block 3, the horizontal sliding block 3 is connected with a horizontal linear guide rail 4 in a sliding way, the horizontal linear guide rail 4 is fixed on the base 10, a vertical linear guide rail 5 is fixed on the side surface of the movable base 2, the vertical linear guide rail 5 is provided with a vertical sliding block 6, the vertical sliding block 6 is connected with the lower end of a swing table 7 through a hinge, the swing table 7 is internally provided with a rotary table 8, and the swing table 7 is fixed on a base 10 through a supporting seat 9. The horizontal linear driving device 1 can be one of a screw-nut pair linear driving device, an oil cylinder linear driving device and an air cylinder linear driving device, the horizontal linear driving device 1 consists of a servo motor, a motor base, a screw rod and a screw nut, rotary motion of the motor is converted into linear motion through the screw-nut pair, and the horizontal linear driving device 1 can also be driven by a servo-controlled air cylinder, linear motion of a piston rod of the oil cylinder or a linear motor.

Referring to fig. 2, 3 and 4, when the horizontal linear driving device 1 works, the output end of the horizontal linear driving device 1 drives the movable base 2 to make horizontal linear motion along the horizontal linear guide rail 4, because the vertical linear guide rail 5 is fixed on the side surface of the movable base 2, the vertical sliding block 6 is connected with the vertical linear guide rail 5 in a sliding manner, the vertical sliding block 6 is connected with the lower end of the swing table 7 through a hinge, and the swing table 7 is fixed on the base 10 through the supporting base 9. When the movable seat 2 moves horizontally and linearly, the lower end of the swing table 7 and the hinged point of the vertical sliding block 6 move vertically and linearly in a reciprocating manner along the vertical linear guide rail 5, so that the rotating angle of the swing table 7 can be accurately controlled, the swing response is fast, the motor power is small, the structure is simple, and the cost is low.

The principle of the invention is shown in figure 5, a point selected on a swing table 7 is hinged with a vertical sliding block 6 which can move along the vertical direction, a vertical linear guide rail 5 of the vertical sliding block 6 is fixed on a moving seat 2, and the moving seat 2 can move along the horizontal direction; the moving seat 2 moves along the horizontal direction, the power source can be a horizontal direction linear driving device 1, the horizontal direction linear driving device 1 can be one of a screw-nut pair linear driving device, an oil cylinder linear driving device and an air cylinder linear driving device, the moving seat 2 moves along the horizontal direction to immediately drive the swing table 7 to swing, and the swing of the swing table 7 enables the vertical sliding block 6 to move along the vertical direction; the theta 1 and the theta 2 can be unequal, and the initial position can be set at any point in the angle range of the theta 1+ the theta 2; a is a horizontal stroke, B is a vertical stroke, and relates to the swing angle, and when θ 1 is equal to or larger than θ 2, a is equal to R (sin (θ 1) + sin (θ 2)), and B is equal to R (1-cos (θ 1)). Let the torque required for swing be T, the driving force F in the X direction is T/(R × cos (θ)), and if the horizontal linear driving device 1 is a screw-nut pair linear driving device, the required motor power P is F × Ph × N/60/η is T/(R × cos (θ)) × Ph × N/60/η, where Ph is a lead screw, N is a motor rotation speed, and η is a transmission efficiency. Influence of R size: the larger the value of R, the smaller the driving force, but the slower the driving response speed, and the magnitude of R can be set according to actual needs.

In the invention, the swing platform 7 is driven by the vertical slide block 6 connected with the bottom, and a support shaft of the swing platform 7 is supported by the support seats 9 at two sides and only plays a supporting role, so that the support shaft is not required to be driven. If the driving support shaft needs torque transmission force, extra consumption of power can be caused, the conversion efficiency of the driving mechanism for acting is reduced, the driving force consumption is good, the utilization rate is low, the adverse condition can be avoided due to the arrangement position of the swinging table, the function conversion rate is improved, the energy consumption is reduced, the cost is saved, the corresponding speed is higher during rotation, the swinging control is more accurate and more favorable, meanwhile, the structural space is favorably reduced, the driving support shaft mechanism does not need to be arranged on the periphery of the swinging table, the device layout is more compact, the space occupation is smaller, the arrangement in production is favorably realized, and the production cost is reduced.

Comparative example

FIG. 6 is a schematic structural diagram of patent publication No. CN 203484917U;

compared with the traditional worm and worm gear transmission mechanism, according to a motor power formula P ═ T/(R × (theta)). Ph × (N/60/eta, the swing radius R of the mechanism is improved by 1.2 times compared with the radius of a turbine, the efficiency of the self-locking function of the single-head worm and worm gear is 0.5-0.6, the transmission efficiency of a ball screw is 0.96, the comprehensive efficiency is 1.92 times of that of the traditional mechanism, and the driving power can be reduced by 52 percent.

The data compared to prior art CN203484917U is shown in the following table: t and R are assumed to be the same, and T ═ R ═ 1: then

Angle of rotation	CN203484917U Driving force	Driving force of the invention	CN203484917U Driving force	The driving stroke of the invention
					60°	Dead angle of swing, undriven	2.00	Dead angle of swing, undriven	0.87
50°	Dead angle of swing, undriven	1.56	Dead angle of swing, undriven	0.77
					40°	5.42	1.31 (decrease 76%)	0.71	0.64 (10% reduction)
30°	2.02	1.15 (43% reduction)	0.62	0.50 (reduction 20%)
					20°	1.39	1.06 (reduction 24%)	0.47	0.34 (28% reduction)
10°	1.13	1.02 (10% reduction)	0.24	0.17 (reduction 29%)
					0°	1	1	0	0

As can be seen from the above table: 1. the invention is not limited by swing dead angle, and the swing angle is larger; 2. the driving force at the same angle is greatly reduced, the driving stroke is also reduced, and the required driving power can be reduced by about 60 percent; 3. the swing of the invention is at the same angle, the invention needs smaller driving stroke than the prior art, the rotating speed of the motor is the same as the lead of the screw rod, and the swing response speed of the invention is faster.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A swing table driving device is characterized by comprising a horizontal linear driving device (1), a moving seat (2), a horizontal sliding block (3), a horizontal linear guide rail (4), a vertical linear guide rail (5), a vertical sliding block (6), a swing table (7), a supporting seat (9) and a base (10);

the horizontal linear driving device (1), the horizontal linear guide rail (4) and the supporting seat (9) are all installed on the base (1), the moving seat (2) is connected with the horizontal linear guide rail (4) in a sliding mode through the horizontal sliding block (3), the moving seat (2) is connected with the horizontal linear driving device (1) in a driving mode, two ends of the swing table (7) are rotatably supported by the supporting seat (9), and the supporting shaft is perpendicular to the horizontal linear guide rail (4);

the vertical linear guide rail (5) is arranged on the movable seat (2), the vertical sliding block (6) is in sliding connection with the vertical linear guide rail (5), the vertical sliding block (6) is hinged with the swing table (7), and the connection position is not on the section of a long axial vertical shaft of a supporting shaft of the swing table (7).

2. A pendulum platform drive arrangement according to claim 1, characterized in that a turntable (8) is provided in the pendulum platform (7).

3. The pendulum platform driving device according to claim 1, wherein the horizontal linear driving device (1) is a screw-nut pair linear driving device, a cylinder linear driving device, a linear motor driving device or other driving methods.

4. The pendulum platform driving device according to claim 1, wherein the horizontal linear driving device (1) is a screw nut pair linear driving device, and mainly comprises a servo motor, a motor base, a screw rod and a screw nut, wherein the servo motor is mounted on the base (10) through the motor base, the servo motor is connected with the screw rod in a driving manner, the screw nut is connected with the horizontal sliding block (3), and the screw rod is matched with the screw nut.