Side seal for linear guide apparatus and linear guide apparatus
AssigneeNsk Ltd.
InventorKazumi Arai
Life of this patent
Estimating the term…
Abstract
The sealing performance by a side seal is improved by changing the sealing function of the side seal for a linear guide apparatus which includes, as constituting components, a seal member, a holder plate that holds the seal member, and a cover (a scraper) depending on its application of the side seal. Plural types of the seal members (1A to 1B) which have a difference in at least any one of the inclination, the material, the thickness, and the tip shape of lips (11a to 11f) are prepared as the seal members. Multiple numbers of the seal members among those seal members are appropriately selected, the same number of the covers and the same number of the holder plates are combined together to assemble the side seal.
Claims14
A side seal for a linear guide apparatus comprising a guide rail, a slider, and a plurality of rolling elements, in which the side seal is fixed to one end of the slider in an actuation direction, the side seal comprising:
- a plurality of covers, each of the plurality of covers including an upper member and side members facing with a top face of the guide rail and both side faces thereof, respectively, with gaps;
- a plurality of seal members each including a lip in contact with the top face and both side faces of the guide rail, the plurality of seal members each including a base, the plurality of seal members each including a first face in a thickness direction and a second face in the thickness direction;
- and
- a plurality of holder plates that hold the bases, respectively, wherein
- the bases each include an engaging portion
- the engaging portions are formed in the first faces, respectively, and engaged with the plurality of holder plates, respectively, by fitting of a protrusion and a recess,
- each of the lips is inclined from each of the first faces toward each of the second faces, and
- the plurality of covers are disposed on the second faces
- the plurality of covers having a same shape are prepared, the plurality of holder plates having a same shape are prepared, and the plurality of seal members having a difference in at least any one of a material, a thickness, and a tip shape of each lip are prepared,
- the plurality of covers, the plurality of holder plates, and the plurality of seal members are combined together, and
- the plurality of seal members include a first seal member having a first lip with a first contact angle of substantially 20 degrees with the guide rail, a second seal member having a second lip with a second contact angle of substantially 30 degrees with the guide rail, and a third seal member having a third lip with a third contact angle of substantially 40 degrees with the guide rail.
A linear guide apparatus comprising a guide rail, a slider, a plurality of rolling elements, and a side seal fixed to one end of the slider in an actuation direction thereof, the side seal comprising:
- a plurality of covers, each of the plurality of covers including an upper member and side members facing a top face of the guide rail and both side faces thereof, respectively, with gaps;
- a plurality of seal members each including a lip in contact with the top face and both side faces of the guide rail, the plurality of seal members each including a base, the plurality of seal members each including a first face in a thickness direction and a second face in the thickness direction;
- and
- a plurality of holder plates that hold the bases, respectively, wherein
- the bases each include an engaging portion
- the engaging portions are formed in the first faces, respectively, and engaged with the plurality of holder plates, respectively, by fitting of a protrusion and a recess,
- each of the lips is inclined from each of the first faces toward each of the second faces,
- the plurality of covers are disposed on the second faces, respectively,
- the plurality of covers having a same shape are prepared, the plurality of holder plates having a same shape are prepared, and the plurality of seal members having a difference in at least any one of a material, a thickness, and a tip shape of each lip are prepared,
- the plurality of covers, the plurality of holder plates, and the plurality of seal members are combined together, and
- a first seal member including a first lip and a second seal member including a second lip as the plurality of seal members;
- two holder plates as the plurality of holder plates;
- and
- two covers as the plurality of covers, wherein
- the first and second seal members are disposed in such a way that the first and the second lips are inclined in opposite directions separated from each other, and
- a first thickness of the first lip and a second thickness of the second lip being not the same.
Dependencies are inferred from the claim text.