SU850318A1 - Electromechanical clamping device - Google Patents

Description

(54) ELECTROMECHANICAL CLAMPING DEVICE

one

The invention relates to the machining of metals, namely, devices for securing tools and parts.

An electromechanical clamping device is known, comprising a housing, an electric motor embedded in it with a shaft mounted for axial movement, and a planetary helical gear with satellites, driven. the wheel of which with an internal tooth is fixed on an output link equipped with an axial support with a spline hole, and the direction of the angle of inclination of the helical gears of the gearbox moves the motor shaft in the direction opposite to the output link 11}

The drawbacks of this device are the complexity of the design, technology of manufacturing and assembling the axial support assembly of the output link consisting of a thrust rolling bearing and its elements, including the end of the housing, two additional flanges and fastening screws.

The complexity of the node axial caused by unbalanced unbalanced axial forces acting on the output link of the device slave helical

internal gears. This is due to the fact that the angle of inclination of the gears of the gearbox is chosen arbitrarily.

The purpose of the invention is to simplify the design of the device.

This goal is achieved by the fact that the axial support is made in the form of two end surfaces of the housing,

10a, the angle of inclination of the helical gears of the gearbox is determined by the following relation

 (t -ssY1g,)

CoboL

where O is the pitch diameter of the driven wheel with

20 internal tooth; average diameter

d holes of the output link; coefficient of friction slip in the spline joint of the output output;

fa.friction friction coefficient in gearing gearbox

 the angle of engagement of the driven wheel with satellites.

Claims (1)

30 Figure 1 shows an electromechanical clamping device (reducer part), a longitudinal section / figure 2 is a diagram of the forces acting on the output link of the planetary gearbox when the tool is pressed. The device contains a motor 2 mounted on the housing 1, a planar gearbox including an external gearing central wheel 3, which is rigidly fixed on the shaft 4 of the electric motor 2, a seat 5, fixed central wheels 6 and internal gearing interconnected with each other the torsion bar 8, located in the shaft hole 4, the movable central wheel 9 of the internal gearing connected to the output link 10, having a splined bore and resiliently from one side to the end of the body flange 1, and on the other through the fixed wheel 7 of the inner body is attached, also at the end of the housing 1. The stud 11 is placed in the spline hole of the output link 10. The electromechanical clamping device operates as follows. When the motor 2 is turned on, the shaft 4 is implanted through the central wheel 3 of the external gearing and. The satellites 5 are transmitted to a movable gear wheel 9 of an internal latching hook connected to the output link 10, having a spitz-hole. Streele. 11, twisting into a tool (not shown), moves away from the clamping device. In order for the axle support of the output link 10 to be unloaded from the axial force, it is necessary that the friction force EtTp i acting on the output link 10 on the side of the steering rod 11, be balanced by the sum of the axial component PPJ. The normal pressure forces T in the engagement of the driven wheel 9 with the satellite 5 and the axial component of the friction force FTTP are congruent, in the toothed connection that occurs when the scientific research institute of the output link 10 is displaced by the force. . 2Mf 2.fA $ a. a.f DcoSoL4; oi) is the torque on the output 10. By performing helical gears with a tilt angle determined by the previously mentioned dependence, the axial forces acting on the input link of the device are balanced, which allows to simplify its design, performed axial support of the output link in the form of two end surfaces of the housing. Claims of the invention: Electromechanical clamping device; The helical gear reducer moves the motor shaft in the direction opposite to the output link, characterized in that, in order to simplify neither the design, the axial support of the output link is made in the form of two end surfaces of the housing, and the angle of inclination of the helical gears of the gearbox is determined by the following relationship where D is the diameter of the pitch circle of the driven wheel with an internal tooth; the average diameter of the slotted hole output, link ;. coefficient of friction slip in the spline joint of the output link-; coefficient of friction slip in gearing gear; LH engagement of the driven wheel with satellites. Sources of information taken into account in the examination 1. USSR author's certificate on the subject 2714172 / 25-08, l. B 23 B 31/28, 1979.