Linear guide, also known as slide rail, linear guide, linear slide, used to support and guide the moving parts in a given direction to do reciprocating linear motion. Under the same volume of moving components, it has a higher rated load and motion accuracy than linear bearings, and at the same time, it can bear a certain torque load. Linear guide can be used as heavy load handling in horizontal space, precise positioning movement and precise guiding movement in vertical space, realizing reliable movement in small space, which is widely used in machine tools, electronic and electrical appliances, medical treatment, and robotics industries.
The introduction of linear guide
Linear guide, also known as slide rail, linear guide, linear slide, used to support and guide the moving parts in a given direction to do reciprocating linear motion. Under the same volume of moving components, it has a higher rated load and motion accuracy than linear bearings, and at the same time, it can bear a certain torque load. Linear guide can be used as heavy load handling in horizontal space, precise positioning movement and precise guiding movement in vertical space, realizing reliable movement in small space, which is widely used in machine tools, electronic and electrical appliances, medical treatment, and robotics industries.
Linear guide is assembled by slide, slider, ball, ball keeper, ball return groove, etc. The main principle is that through the ball return groove, ball keeper and other structures to make the steel ball column for the cyclic movement, so as to realize the low-friction linear motion of the slider on the slide. This structure determines the linear guide has the following basic characteristics:
Feature 1: Because it is point-face contact, the friction resistance is very small, so it can carry out fine movement and realize the high precision positioning of the control device and so on.
Feature 2: Because the balls have their own rolling grooves, the force on the rotating surface is spread out, so there is a large allowable load.
Feature 3: Linear guides are not easy to generate frictional heat during operation and are not susceptible to thermal deformation, so they are suitable for high-speed movements.
Feature 4: Usually the contact angle of each ball column is 45°, so that the 4 directions of action on the slide (radial, anti-radial and lateral) have the same rated load.
Classification of linear guide
According to the different applicable loads, it can be mainly categorized into miniature and medium and heavy load type. Linear guide is mainly by the ball transfer load, so the difference between miniature and medium and heavy-duty type is mainly the number of different columns of ball. miniature linear guide generally have 2 columns of steel ball, and track surface 4 points of contact, compact structure; in the heavy-duty type linear guide generally have 4 columns of steel ball, improve the carrying capacity. General miniature linear guide basic dynamic load rating within 10KN, medium and heavy-duty type of basic dynamic load rating can be as high as 80KN.
Widen the guideway use occasions:
The total height and rail width ratio of the standard rail is about 1.1, while the height to width ratio of the wider rail is about 0.65, the wider rail is 40% lower than the standard rail, the total height, so in the direction of the height of the occasions with limitations, it is most suitable for the use of the wider rail; on the contrary, in the direction of the width of the occasions with limitations, please use the standard rail.
On the other hand, the wider rail has a lower aspect ratio, and compared with the standard rail, the static allowable moment is increased by more than one time, and the rigidity is greatly improved, which is the most suitable for the structure with center of gravity offset.
Where to use the wider slider:
The basic load ratings and static allowable moments of the wider slider and the standard slider are approximately the same, and there is no change, but the fixing bolts on the wider slider are larger than those on the standard slider, and the fixing strength is increased.
Various lengths of slider use occasions:
After selecting the track, what length of slider to use, the main direction of consideration is that the longer the slider, the greater the basic rated load and static allowable torque.
