Dust protection elements for ball screws
A ball screw and screw technology, applied in the direction of transmission, belt/chain/gear, mechanical equipment, etc., can solve the problems of shortening the service life of the ball screw, increasing the running resistance of the overall structure, and increasing the installation cost.
Active Publication Date: 2019-04-05
HIWIN TECH
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Problems solved by technology
[0002] During the use of the ball screw, there will be wear debris between the screw, nut and the ball due to the rolling contact with each other. If the wear debris left inside is not removed, it will inevitably affect the transmission precision and operation of the ball screw. Smoothness, thereby accelerating the shortening of the service life of the ball screw
[0003] As far as the prior art is concerned, for example, the US5231888 patent case uses a suction device to absorb the wear debris generated inside, but the suction device will increase the complexity of the overall structure and also increase the installation cost
In addition, as in JP4967809 patent case, magnets are used to enhance the bonding force between the lip of the dust-proof element and the screw, but it is easy to attract wear debris to the thread groove of the screw to cause accumulation, so although the setting of the magnet increases the sealing effect , but will indirectly increase the running resistance of the overall structure
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[0024] see figure 2 and image 3 , the ball screw 10 shown in the figure includes a screw 12, a set of nut 14 arranged on the screw 12, and a plurality of balls (not shown) arranged between the screw 12 and the nut 14, the screw 12 The outer peripheral surface has an external thread groove 122, and the inner peripheral surface of the nut 14 has an internal thread groove 142. The external thread groove 122 of the screw rod 12 and the internal thread groove 142 of the nut 14 correspond to each other to form a spiral channel 16. , so that the ball can circulate along the spiral channel 16. see again figure 1 , The dustproof element 18 of the present invention includes an annular body 20 and three elastic valve pieces 30 .
[0025] The outer ring surface of the ring body 20 has two opposite positioning flanges 21, the inner ring face of the ring body 20 has two opposite dust-proof lips 22, and the ring body 2 ( ) is penetrated by the screw rod 12 during assembly. And by engag...
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A dustproof element is mainly applied to a ball screw. The ball screw comprises a threaded rod and a nut arranged on the threaded rod in a sleeving manner; the dustproof element comprises an annular body and an elastic valve block; the annular body is arranged at one end of the nut, and the threaded rod penetrates the annular body; an abrasive dust outlet is formed in the outer annular face of the annular body, and one end of the abrasive dust outlet communicates with a spiral passageway formed between the threaded rod and the nut; the elastic valve block is arranged at the other end of the abrasive dust outlet of the annular body; and in this way, when fluid applies thrust on the elastic valve block, the elastic valve block can be pushed away so that the abrasive dust outlet can be in an opened shape, at the moment, abrasive dust can be smoothly discharged from the abrasive dust outlet along with the fluid, and the effect of prolonging the service life can be achieved.
Description
technical field [0001] The present invention relates to a ball screw, in particular to a dust-proof component for the ball screw. Background technique [0002] During the use of the ball screw, there will be wear debris between the screw, nut and the ball due to the rolling contact with each other. If the wear debris left inside is not removed, it will inevitably affect the transmission precision and operation of the ball screw. smoothness, thereby accelerating the shortening of the service life of the ball screw. [0003] As far as the prior art is concerned, for example, the US5231888 patent case uses a suction device to absorb the wear debris generated inside, but the suction device will increase the complexity of the overall structure and also increase the installation cost. In addition, as in JP4967809 patent case, magnets are used to enhance the bonding force between the lip of the dust-proof element and the screw, but it is easy to attract wear debris to the thread g...
Claims
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IPC IPC(8): F16H25/24F16H25/22
CPCF16H25/2204F16H25/2418
Inventor 邓鸿群余思纬留伟伦
Owner HIWIN TECH