Contact sealing device for ball screw
A ball screw and sealing device technology, applied in the direction of transmission, belt/chain/gear, mechanical equipment, etc., can solve the problems of oil leakage, dust or small foreign matter intrusion, poor sealing effect, etc., to reduce friction torque , Improve the sealing performance, improve the effect of the working environment
Inactive Publication Date: 2021-03-09
XIAN UNIV OF TECH
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AI Technical Summary
Problems solved by technology
The non-contact sealing ring is also called the labyrinth sealing ring. The shape of the inner hole is opposite to that of the threaded raceway of the lead screw, and there is a slight gap. Although it can avoid the increase of the friction torque, it is easy to cause the intrusion of dust or small foreign matter, and at the same time Lubricating oil leakage, poor sealing effect
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Embodiment Construction
[0021] The invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0022] A sealing device of a contact ball screw comprising a screw nut 8 coupled to the screw 1, and the inner wall of the screw nut 8 opens a mounting slot, and each mounting groove is in the depth direction. Connect the elastic sealing ring 6, the annular brush fixing ring 4, the end cap 3, the elastic seal ring 6, the outer wall of the end cap 3, all of which contact the wire nut 8, the elastic seal ring 6 internal wall threaded connection lead screw 1, ring brush fixing ring 4 The inner wall is connected between 1 between the lead bums 1.
[0023] The outer wall of the elastic seal 6 has a plurality of annular toothed places, each of which is in contact with the wire nut 8.
[0024] The elastic seal 6 is opened from the recess inwardly near the bottom of the mounting trough, and the annular compression spring 7 is connected in the groove.
[0025] The ...
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The invention discloses a contact sealing device for a ball screw. The contact sealing device comprises a lead screw nut connected to a lead screw, wherein mounting grooves are formed in the inner walls of two ends of the lead screw nut; an elastic sealing ring, an annular brush fixing ring and an end cover are sequentially connected to the interior of each mounting groove from inside to outside in the depth direction; the outer walls of the elastic sealing rings and the end covers are in contact connection with the lead screw nut; the inner walls of the elastic sealing rings are in threaded connection with the lead screw; and an annular brush is connected between the inner wall of each annular brush fixing ring and the lead screw. Two seals are arranged between the ball nut and the lead screw, and are a hole seal at a nut hole and a shaft seal of a spiral raceway of the lead screw separately, so that the sealing performance is improved; according to the characteristics of the sectionof the raceway of the lead screw, the inner wall of each elastic sealing ring is provided with circular-boss-shaped threaded teeth, so that the contact area with the lead screw is reduced, and the effect of reducing the friction torque is achieved; and meanwhile, one annular brush is mounted at the front part of each sealing ring, and foreign matters attached to the surface of the lead screw are brushed away in advance in the transmission process, so that the sealing working environment is improved.
Description
Technical field [0001] The present invention belongs to the technical field of ball screw supporting equipment, and in particular to a sealing device of a contact ball screw. Background technique [0002] The ball screw is converted into a straight movement, or converts the linear motion into an important transmission element of the rotary movement. In particular in the aviation field, the ball screw deputy is mostly under the conditions of exposed or semi-or semi-or semi-ornament, often suffering from bad natural environments, and has limited daily maintenance, so the sealing design of the ball screw side is particularly important. [0003] The sealing form of the ball screw side can be divided into a contact and non-contact, the inner hole in the contact type elastic seal is formed in a shape similar to the screw thread roller, so that the screw is closely wrapped and loaded into the nut. Or inside the grooves on both ends of the sleeve; the sealing effect of the contact seal i...
Claims
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IPC IPC(8): F16H25/24F16H25/22
CPCF16H25/2418F16H25/2204
Inventor 崔亚辉李喆李龙龙陈润霖王建磊
Owner XIAN UNIV OF TECH