A screw drive device
A technology of screw drive and screw, applied in the direction of transmission, belt/chain/gear, mechanical equipment, etc., can solve the problems of the screw nut and the screw are not easy to disengage, and the idling of the screw drive is difficult to eliminate.
Active Publication Date: 2018-06-15
南通高新管件制造有限公司
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Problems solved by technology
[0006] The present invention mainly aims to solve the problem that the backlash of the screw drive device in the prior art is not easy to eliminate, and the screw nut and the screw rod are not easy to disengage, and provides a screw drive device
Method used
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Embodiment Construction
[0022] The specific embodiment of the present invention will be described in further detail by describing the embodiments below with reference to the accompanying drawings, the purpose is to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solutions of the present invention, and contribute to its implementation.
[0023] specific,
[0024] Such as figure 1 , figure 2 with image 3 As shown, the screw rod 11 belongs to the prior art, is cylindrical, and has a spiral groove on the outer peripheral surface. Both ends of the screw rod 11 are supported in the rotating support member 12 and cannot move axially. Driven to rotate around the centerline of the screw mandrel 11.
[0025] Such as figure 1 with figure 2 As shown, the threaded block 21 is in the shape of a long strip, and the screw drive device uses two threaded blocks 21, and the two threaded blocks 21 are symmetrically distributed in 180 degree...
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The invention discloses a screw rod transmission device, belongs to the field of mechanical transmission, and particularly relates to a screw rod transmission device which has no backlash and is likely to be disengaged from transmission. The screw rod transmission device comprises two thread blocks; the two thread blocks are rotationally distributed in symmetry with respect to a specific axis by 180 degrees; the specific axis is intersected with and perpendicular to the center line of a screw rod; the thread blocks are in contact with a spiral groove of the screw rod; the portions where the thread blocks are in contact with the spiral groove of the screw rod are threads which are matched with the spiral groove; the ends, at the same side, of the two thread blocks are fixedly connected with each side plate; the side plates are fixedly connected with rotation shafts; the rotation shafts are supported inside rotation supporting components; the rotating symmetry axis between the two thread blocks coincides with the center line of the rotation supporting components; the thread blocks are pressed into the spiral groove of the screw rod through torque applied by the side plates; and the distance between the threads of the thread blocks and the axis of the rotation supporting components is greater than the radius of the screw rod. According to the screw rod transmission device, rotational motion can be converted into linear motion, and no axial backlash occurs in transmission; and when the screw rod transmission device needs to be disengaged from transmission, the thread blocks can be disengaged from the screw rod.
Description
technical field [0001] The invention discloses a screw drive device, which belongs to the field of mechanical transmission, and in particular relates to a screw drive device without backlash and easy to disengage the drive. Background technique [0002] In the prior art, the conversion of the rotational motion of the motor or power components into the linear motion of the target object requires the use of a screw drive device. The screw nuts that cooperate with the screw rod in this device mainly have two structures: ordinary nuts and ball nuts. [0003] In the scene of high-precision motion, it is necessary to eliminate the gap between the screw nut and the screw rod, otherwise there will be transmission backlash during reciprocating motion, which will affect the accuracy of the system and generate noise and impact. The common nuts in the prior art need to use two common nuts, and the gap between the drive nut and the screw shaft axis can be eliminated by installing an axia...
Claims
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IPC IPC(8): F16H25/24F16H25/20
CPCF16H25/2003F16H25/24F16H2025/2445
Inventor 余静远
Owner 南通高新管件制造有限公司