CN201155525Y

CN201155525Y - Roller linear bearing

Info

Publication number: CN201155525Y
Application number: CNU2007201134761U
Authority: CN
Inventors: 吕永昌
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-08-27
Filing date: 2007-08-27
Publication date: 2008-11-26
Anticipated expiration: 2017-08-27

Abstract

The utility model relates to a bearing, in particular to a straight roller bearing. The straight roller bearing consists of an outer track, rollers, a retainer and a reverser; wherein, the internal and external surfaces of the outer track are both cylindrical surfaces; a plurality of return slots are arranged between the internal and external cylindrical surfaces of the outer track; a plurality of rows of saddle-shaped rollers are arranged along the internal cylindrical surface of the outer track; both sides of the rollers are convex arcs which match with the arc of the cylindrical surface of the outer track; the middle parts of the rollers are concave arcs which match with the circumference of the plain shaft. Both the outer track and the rollers of the bearing are made of GCr15 bearing steel, which is processed through quenching-tempering heat treatment. The reverser is provided with a lubricator. The straight bearing produced in the method is genuinely designed, with a plurality of rows of saddle-shaped rollers arranged between the internal cylindrical surface of the outer track and the external cylindrical surface of the plain shaft, thereby the prior point contact is converted into arc contact, thus enlarging the contact area, reducing the contact stress, greatly increasing the carrying capacity and prolonging the service life.

Description

Roller straight-line bearing

Technical field

The present invention relates to a kind of bearing, especially relate to a kind of roller straight-line bearing.

Background technique

For a long time at a kind of linear bearings of multi-field frequent use such as textile manufacturing machine, printing machinery, lathe, surveying instrument, automobile makings, this bearing has closed, clearance type and open, it can move back and forth at optical axis upper edge axis.Because this bearing can be along axial-movement, so structure is special.Left view as Fig. 1 and Fig. 1 is shown in Figure 2, present this bearing is made up of an outer ring 1 and a retainer 2 and some row steel balls 3, when work steel ball with outer ring and steel ball and optical axis 13 between be to put that to contact its contact stress big, poor rigidity, particularly having under certain load condition, poor rigidity obviously occurs and can not satisfy the kinematic accuracy requirement, contact stress is big, wearing and tearing, spot corrosion occur, peels off and damage phenomenon such as fatigue and cause bearing not work.This bearing can not adapt to the parts moving linearly in the present mechanical industry.

Summary of the invention

In order to address the above problem, the purpose of this invention is to provide a kind of linear bearing that bears big load, adapt to big load, high rigidity, the roller straight-line bearing that the life-span is long.

The present invention is mainly solved by following technical proposals: a kind of roller straight-line bearing, form by outer ring, retainer and roller, the interior outside of outer ring is the cylndrical surface, along arranging the saddle-shaped roller of some row on the inner cylindrical surface, the both sides of roller are that dome arc and outer ring inner cylindrical surface circular arc are complementary, and middle cylindrical for concave circular arc and optical axis is complementary.

Described roller is the shape of a saddle; Have between roller and the roller directly contact or roller and roller between adopt the nylon chain that each roller is separated two kinds of forms, and adopt retainer and back device that each row roller is contained on the outer ring of bearing;

The outer ring of linear bearing, roller all adopt the GCr15 steel to make, and through quenching, tempering heat treatment; The both end sides of linear bearing is provided with a back device, and the guide rolls row are made shuttling movement; Wherein on the back device of a side, be provided with oil gun;

Produced according to the method described above roller straight-line bearing, owing to adopted shape of a saddle roller dexterously, thereby original steel ball and outer ring and steel ball contacted with point between the optical axis become the camber line contact, increased area of contact, thereby reduced contact stress, improved bearing capacity and rigidity greatly, and improved the working life of linear bearing greatly.It is multi-field that roller straight-line bearing can be widely used in textile manufacturing machine, printing machinery, lathe, surveying instrument, automobile making etc.

Description of drawings

Fig. 1 is the structural representation of prior art linear bearing.

Fig. 2 is the left view of Fig. 1.

Fig. 3 is the structural representation of the embodiment of the invention 1.

Fig. 4 is the side view of Fig. 3.

Fig. 5 is the AA sectional view of Fig. 4.

Fig. 6 is the structural representation of the embodiment of the invention 2.

Fig. 7 is the structural representation of the embodiment of the invention 3.

Embodiment

Below by embodiment, and 3-7 in conjunction with the accompanying drawings, technological scheme of the present invention is described in further detail.

Embodiment 1: by Fig. 3, Fig. 4 and roller straight-line bearing shown in Figure 5, form by outer ring 1 and retainer 5 and roller 2, outer ring 1 is by interior, external cylindrical surface constitutes and is provided with a step plane at two ends, on the step plane, be provided with several Screws hole, on outer ring 1, be provided with a few road roller backhaul grooves 4, the manufacturing of GCr15 Bearing Steel is adopted in outer ring 1, and through quenching, tempering heat treatment, hardness reaches HRC58～62, outer ring 1 external cylindrical surface is after grinding, cylindricity reaches 0.005mm, with the coaxality of inner cylindrical surface less than 0.01mm, roughness value is less than Ra0.8 μ m, inner cylindrical surface is after grinding and honing, the cylindricity of cylndrical surface reaches 0.0015mm, and roughness value is less than Ra0.1 μ m.Roller 2 shapes such as saddle, respectively there is one section dome arc 9 on both sides, be complementary with the interior circular arc of outer ring 1, middle concave circular arc section 10 is complementary with optical axis 13 external arc, shape of a saddle roller 2 adopts the manufacturing of GCr15 Bearing Steel, and through quenching, tempering heat treatment, hardness reaches HRC60～62, the working surface of shape of a saddle roller 2 circularity behind grinding-polishing reaches 0.001mm, and roughness value is less than in the Ra0.1 μ m.Every row roller is limited in looping roller chain between the inner cylindrical surface of outer ring 1 and the backhaul groove 4 by the back device 3 at

retainer

5 and 1 two ends, outer ring with some shape of a saddle rollers 2.On the back device of roller straight-line bearing one end, be provided with an oil gun 8 and be used to refuel lubricate, the frictional force when effectively reducing work.1 cylindrical two ends have the installation of a jump ring groove when just using with bearing in the outer ring.

Embodiment 2: roller straight-line bearing shown in Figure 6, and its roller straight-line bearing identical with embodiment 1 with Fabrication parameter, its difference is, whole roller straight-line bearing is severed a groove 11, promptly is called clearance type, to adapt to the transmission requirements of different machineries.

Embodiment 3: roller straight-line bearing as shown in Figure 7, its roller straight-line bearing identical with embodiment 1 with Fabrication parameter, its difference are, whole roller straight-line bearing is prescinded a routine roller form an opening 12, promptly be called style of opening, to adapt to the transmission requirement of different machineries.

The above-mentioned three kinds of roller straight-line bearings of the present invention, under same specification, its bearing capacity, rigidity will increase exponentially, and also improve a lot working life under equal load-up condition.

Claims

1, a kind of roller straight-line bearing, form by outer ring (1), roller (2), back device (3), retainer (5), the inboard of outer ring (1) is an inner cylindrical surface, it is characterized in that outer ring (1) is provided with some road backhaul grooves (4), retainer (5) is equipped with and a back device (3) respectively is equipped with at two ends in the inboard of (1) in the outer ring, some rollers (2) are covered with in the loop checking installation that is made of the back device (3) at the inner cylindrical surface of outer ring (1), two ends, backhaul groove (4) and retainer (5), are distributed with the loop that some row are made up of roller on the inner circumference of outer ring (1).

2, roller straight-line bearing according to claim 1, it is characterized in that described roller (2) is the shape of a saddle, the roller both sides respectively are provided with one section dome arc (9) and consistent with the circular arc of outer ring (1) inner cylindrical surface, and the centre is provided with one section concave circular arc (10) and consistent with optical axis (13) cylindrical circular arc.

3, roller straight-line bearing according to claim 1 and 2 is characterized in that described back device (3) is shaped as the U font, and the two ends and the backhaul groove (4) on outer ring (1) that are located at outer ring (1) constitute a loop checking installation.

4, roller straight-line bearing according to claim 1 is characterized in that described outer ring (1) inner cylindrical surface is provided with a retainer (5), and the endless roller chain that each row is made up of some shape of a saddle rollers (2) is limited on the outer ring (1).

5, roller straight-line bearing according to claim 1 is characterized in that two of described outer ring (1) external cylindrical surface respectively is provided with a jump ring groove (6).

6, roller straight-line bearing according to claim 3 is characterized in that respectively being provided with a dust ring (7) in the outside of the back device (3) at two ends.

7, roller straight-line bearing according to claim 6 is characterized in that the back device (3) of an end is provided with oil gun (8).

8, roller straight-line bearing according to claim 7 is characterized in that described outer ring (1) has a slit (11).

9, roller straight-line bearing according to claim 7 is characterized in that described outer ring (1) has breach (12).