CN2188449Y - Linear ball guide rail - Google Patents
Linear ball guide rail Download PDFInfo
- Publication number
- CN2188449Y CN2188449Y CN 94211995 CN94211995U CN2188449Y CN 2188449 Y CN2188449 Y CN 2188449Y CN 94211995 CN94211995 CN 94211995 CN 94211995 U CN94211995 U CN 94211995U CN 2188449 Y CN2188449 Y CN 2188449Y
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- CN
- China
- Prior art keywords
- steel ball
- ball
- end cap
- slide blocks
- groove
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to a linear ball guide rail, the both sides of the rail bar of the guide rail and the inner side of an opposite sliding block body are respectively provided with an array of linear Gothic ball grooves, linear circular through-holes are respectively arranged on the parts which are close to the Gothic ball grooves of the sliding block body, steel ball rotary grooves are arranged in the end covers which are on the both ends of the body, and stable linear guiding motion is generated because the both sides of the guide rail are respectively formed with a linear ball ring. A cover plate is arranged in the steel ball rotary grooves which are in the end covers to hold steel balls in the rotary grooves and increase the smooth of the steel ball circulations. Load steel balls are held in the grooves which they are already in by a load steel ball holder which is clamped between the two end covers. The guide rail has big load capacity and smooth operation.
Description
The utility model is meant especially that about a kind of straight ball-guide a kind of two circles that utilize by the formed straight line steel ball of the steel ball of continuous rolling circle, bear each to load and moment of torsion, reaches the straight ball-guide of the linear guiding motion of steady and low surface friction drag.In addition, the utility model makes ball-recirculation more smooth and easy via special end cover designs, and it is easier to make, and with simple design, reach the function of straight ball-guide, reduce manufacture cost simultaneously, and can be applied to easily in the linear guiding motion on toolroom machine or the conveying mechanism.
The existing linear ball bearing that is usually used in accurate linear guiding motion comprises straight line ball bushing bearing and straight ball-guide.These bearings and guide rail have the guiding movement that a few steel ball circles are used for bearing load and produce low surface friction drag.In the steel ball circulating path that rolling steel ball is limited in being made of load steel ball groove, zero load steel ball groove or through hole and steel ball turning slot, and utilize the steel ball retainer to prevent coming off of steel ball.
Straight line ball bushing Bearing Installation is born vertical or radial load on d-axis or straight rail.Usually, its moment of torsion ability to bear is low than straight ball-guide.The rail bar both sides of some straight ball-guide respectively have two to be listed as the linearly circular arc steel ball groove of shape with relative slide blocks body inboard, to form four circle steel ball circles, increase its load and moment of torsion ability to bear.The manufacturing technology of straight ball-guide with four row circular arc steel ball grooves is comparatively complicated, for realizing four row steel ball groove correct relative and configurations, and guarantee walking precision on the guide rail and the steel ball smooth-going degree that rolls, and load is uniformly distributed on the four row steel ball circles, and make manufacture cost increase.Yet; in fact; usually because the error on making; do the time spent when guide rail is subjected to normal load, have only the steel ball circle of top two row to bear load, the steel ball circle of below two row does not bear load; the wrapping angle regular meeting that adds steel ball and circular arc steel ball groove is subjected to effects of load and changes; feasible load can't be evenly distributed on the steel ball circle, therefore, makes the load-bearing ability thereby the reduction of this guide rail.
Another problem is that the load steel ball retainer of existing straight ball-guide is to utilize tinsel to be bent into needed shape, and has a slotted hole.When load steel ball during along steel ball turning slot that steel ball groove inlet end covers, regular meeting since the obstruction at right angle, slotted hole end cause the steel ball rolling to have some setbacks and produce noise.
In view of this, the purpose of this utility model is for providing a kind of the have load of enhancing and the straight ball-guide of moment of torsion ability to bear.
Another purpose of the present utility model is to utilize the structure of above-mentioned straight ball-guide to promote the smooth-going degree of ball-recirculation and lower the noise that is produced when walking on guide rail.
The utility model proposes a kind of like this straight ball-guide that is used to produce the linear guiding motion of smooth-going and low surface friction drag, it is made up of a rail bar, a slide blocks body, a pair of end cap, a pair of load steel ball retainer, two circle steel ball circles, the scraping brushing device of a pair of end cap outer end and the scraping brushing device of a pair of slide blocks body bottom; Respectively has a straight line Goethe shape steel ball groove on the rail bar outside and the relative slide blocks body, near respectively being provided with a zero load steel ball circulation through hole on the position above the straight line Goethe shape steel ball groove of slide blocks body, end cap is equipped with at slide blocks body two ends, has in the end cap to be used to guide ball and to enter zero load steel ball circulation through hole and drawn by this through hole and be back to straight line Goethe shape steel ball groove is finished the linear guiding motion between slide blocks body and rail bar to the steel ball circle with this respectively to form a steel ball circle in the guide rail both sides opposed U-shaped steel ball turning slot; The U-shaped steel ball turning slot of end cap top has one to be used to guarantee that steel ball is positioned at the U-shaped turning slot and to make lubricant oil enter oil cavity and make it be maintained at the cover plate of each steel ball tow-away zone via the oil nozzle of end cap outer end.
And in described straight ball-guide, in the end cap that contains U-shaped steel ball turning slot, the revolution of guide rail both sides steel ball can steel ball pushes away mode mutually and turns round and finish; And being directed to the top by Goethe's shape steel ball groove of below, steel ball can be the steel ball rotary path that a semicircle and a straight line are formed near the U-shaped steel ball turning slot in the zero load steel ball circulation through hole at slide blocks body center position.
And, in described straight ball-guide, in the zone of U-shaped steel ball turning slot, oil cavity and the oilhole of end cap, can be provided with one make steel ball remain in the U-shaped steel ball turning slot, and can make lubricant oil remain on the cover plate that can not leak outside and pollute in each steel ball tow-away zone; Has the circular arc chamfering that to promote steel ball circuit smoothness on two semi-circular ends of cover plate and central two circular holes.
And in described straight ball-guide, being used to prevent to be positioned at the load steel ball retainer that the steel ball of Goethe's shape steel ball groove comes off can be clamped between two end cap.
And, in described straight ball-guide, each can have a scraping brushing device in the two end cap outer end, this scraping brushing device is coated on a steel disc surface by rubber and constitutes, and the contact position of this scraping brushing device and rail bar has a function that is used to produce spring sheet, make this position of scraping brushing device be close to rail bar, and can allow foreign matter move and can not be deposited in groove on the scraping brushing device along groove.
And, in described straight ball-guide, can be provided with a scraping brushing device in slide blocks body bottom, this scraping brushing device also has a groove.
In view of the above, the utility model proposes a kind of straight ball-guide, it is mainly by rail bar, slide blocks body, end cap, load steel ball retainer, rubber scraping brushing device and bear load and the rolling steel ball of the resistance of reducing friction is formed, respectively there is a row straight line Goethe shape steel ball groove rail bar both sides with relative slide blocks body inboard, the top center position of Goethe's shape steel ball groove of close slide blocks body is processed with two zero load steel ball circulation through holes.End cap is equipped with at slide blocks body two ends, end cap inside has two U-shaped steel ball turning slots, enter zero load steel ball circulation through hole in order to guiding load steel ball, be back in the straight line Goethe shape steel ball groove between rail bar and the slide blocks body via the steel ball turning slot on the end cap of the slide blocks the other end again, respectively be formed with a steel ball circle in the straight ball-guide both sides.When spherical guide bears when load, load acts on the steel ball in the straight line Goethe shape steel ball groove via slide blocks.Goethe's shape makes the wrapping angle of load steel ball groove be 45 degree.Therefore, load resolves into two component that are miter angle via Goethe's shape steel ball groove of spherical guide both sides, the line stretcher of component is orthogonal to the guide rail centre, make guide rail can not be subjected to the effect of additional torque, and, also make on the load steel ball in the Goethe's shape groove that is uniformly distributed in the guide rail both sides of loading, thus the precision and the smooth-going degree of increase guide rail working life and linear guiding motion.
In the end cap at slide blocks body two ends, have two opposed U-shaped steel ball turning slots, this turning slot can hold five steel balls, utilizes steel ball to push back mutually and changes the revolution that principle is finished steel ball.U-shaped steel ball turning slot top is equipped with a cover plate, has circular arc example angle on two semi-circular ends of cover plate and the central circular hole, to promote the smooth-going degree of steel ball circuit.This turning slot has the steel ball rotary path that a semicircle and a straight line are formed, the straight line path end of turning slot is near the end cap middle position, make the zero load steel ball circulation through hole accepted with this end near the central position of slide blocks body, and can not be positioned at the position, top of this body Goethe shape steel ball groove.Do the time spent when straight ball-guide is subjected to load, slide blocks body Goethe shape steel ball groove top rotation angle position has the phenomenon generation that stress is concentrated.Therefore, zero load steel ball circulation through hole must be near the central position of slide blocks body, to increase the load-bearing ability of slide mass.In addition, end cap can be formed by plastic materials, to lower the noise that produces when steel ball turns round.The rubber scraping brushing device also can be installed in end cap outer end and slide blocks body bottom, causes the steel ball circulation to have some setbacks to prevent foreign matter from entering Goethe's shape steel ball groove.The load steel ball is remained in Goethe's shape steel ball groove of slide blocks body by the load steel ball retainer that is snapped between two end cap, prevents that steel ball from when slide blocks separates with rail bar and come off, helping the assembling of steel ball in the straight ball-guide simultaneously.Except having U-shaped steel ball turning slot and cover plate, the locating slot of locating stud and load steel ball retainer is arranged still on the end cap, and make the lubricant oil that adds to pass through oilhole and the oil cavity of each steel ball circle tow-away zone with lubricated steel ball.Design of the present utility model makes each steel ball circle tow-away zone near oilhole, thereby has shortened oil cavity length, and promoted lubrication effect.In addition, locating stud can be guaranteed the relative position between U-shaped steel ball turning slot and Goethe's shape steel ball groove and the zero load steel ball circulation through hole.Load steel ball retainer has and makes the simple characteristics such as assembling is easy that reach with the spring wire bending forming.End cap and rubber scraping brushing device are fixed in slide blocks body two ends with screw.The utility model had two row Goethe shape steel ball grooves can be via the adjustment of diameter of the steel ball size, and straight ball-guide is imposed to a certain degree precompressed, improving the load-bearing ability, and can eliminate the guide rail play, the precision when promoting walking simultaneously.
Straight ball-guide of the present utility model utilizes two circle straight line steel ball circles to bear each to load and moment of torsion.The load steel ball rolls in the straight line Goethe shape steel ball groove of guide rail both sides, and the Goethe is shaped as two circular arcs and forms, and load is uniformly distributed on the load steel ball.Have the simplicity of design of the straight ball-guide of two row Goethe shape steel ball grooves, it is easy than existing product to process, and can reduce manufacture cost, also can reach needed walking precision.
In the utility model, the load steel ball rolls along straight line Goethe shape steel ball groove, via the steel ball turning slot on the end cap, enters zero load steel ball circulation through hole.Steel ball turning slot on the end cap is a U-groove bevel, is equipped with a cover plate on groove, makes the steel ball revolution more smooth-going; U-shaped steel ball turning slot has the steel ball rotary path that a semicircle and a straight line are formed, the position of the zero load steel ball circulation through hole of this groove straight line path end of feasible connection is near the central position of slide blocks body, the stress of having avoided zero load steel ball circulation through hole to be positioned at this body Goethe shape steel bead groove top is concentrated the position, thus the load-bearing ability of having promoted the slide blocks body.Simultaneously, U-shaped steel ball turning slot can hold five steel balls, and the steel ball turning slot of existing product can only hold three steel balls usually.Therefore, straight ball-guide of the present utility model bears load with more steel ball, can increase the working life of guide rail.End cap is made by plastic materials, can reduce the revolution noise of ball.In addition, load steel ball retainer is made by the spring wire bending, makes easily, can not have influence on the rolling of steel ball simultaneously.
In order further to understand feature of the present utility model and technology contents, see also following about detailed description of the present utility model and accompanying drawing.It should be understood, however, that the appended pattern usefulness with explanation only for reference, and be not to be used for the utility model is done any restriction.Relevant accompanying drawing is:
Fig. 1 is the front view of the straight ball-guide that the utility model proposes;
Fig. 2 is the plan view of the straight ball-guide that the utility model proposes;
Fig. 3 is the side view (scraping brushing device that does not contain the end cap outer end) of the straight ball-guide that the utility model proposes;
Fig. 4 is the slide blocks body in the utility model and the assembled sectional view (wherein containing steel ball) of slide rail;
Fig. 5 is the sectional view of the rail bar in the utility model;
Fig. 6 is the side view of the slide blocks body in the utility model;
Fig. 7 is the front view of the end cap in the utility model;
Fig. 7 A is the A-A sectional view of the utility model Fig. 7;
Fig. 7 B is the B-B sectional view (wherein containing steel ball and load steel ball retainer) of the utility model Fig. 7;
Fig. 8 is the stereogram of the cover plate of the end cap U-shaped steel ball turning slot in the utility model;
Fig. 9 is the stereogram of the load steel ball retainer in the utility model;
Figure 10 is the front view of the scraping brushing device of the end cap outer end in the utility model;
Figure 10 A is the A-A sectional view of the scraping brushing device of the end cap outer end in the utility model;
Figure 11 is the stereogram of the scraping brushing device of the slide blocks body bottom in the utility model.
Fig. 1 to Figure 11 is the enforcement illustration of the straight ball-guide that the utility model proposes.The spherical guide that is used for the linear guiding motion, as Fig. 1, Fig. 2 and shown in Figure 3, be by a rail bar 1, one slide blocks body 2, a pair of end cap 3, pair of U-shaped steel ball turning slot cover plate 4, a pair of load steel ball retainer 5, two circle steel balls 6, the formations such as scraping brushing device 8 of the scraping brushing device 7 of a pair of end cap outer end and a pair of slide blocks body bottom.The bottom surface 9 and the side 10 of this rail bar 1 are reference level, and this rail bar 15 is provided with the fixedly usefulness of straight ball-guide of a counter sink 11 conducts.As Fig. 4, Fig. 5, shown in Figure 6, these rail bar 1 both sides and these slide blocks body 2 inboards respectively are provided with a straight line Goethe shape steel ball groove 12, in order to guiding load steel ball 6, to produce the straight line motion of low surface friction drag.One side of Goethe's shape steel ball groove 12 of this rail bar 1 is provided with load steel ball retainer mounting groove 13, the situation that circulates and have some setbacks with avoid loading steel ball retainer 5 and load steel ball 6 that contacting of Goethe's shape steel ball groove 12 caused.Goethe's shape is made up of two interior circular arcs, makes load steel ball 6 and Goethe's shape steel ball groove 12 produce two identical wrapping angles (theoretical value is a miter angle).Therefore, as shown in Figure 4, the load 15 straight line Goethe shape grooves 12 via the spherical guide both sides resolve into a pair of component 16 from the horizontal by miter angle, and the line stretcher of each component 16 is orthogonal to the centre of guide rail, makes guide rail can not be subjected to the effect of additional torque.Goethe's shape groove 12 can be by adjusting the suffered pressure of guide rail to the change of diameter dimension of load steel ball 6, to improve its load-bearing ability, eliminate the guide rail play and to promote guide rail walking precision.
As shown in Figure 6, be provided with zero load steel ball circulation through hole 17 in position, top near Goethe's shape steel ball groove 12 of this slide blocks body 2.Slide blocks body end face 18 and side 19 are reference level.Also be provided with positioning hole 20 and screw 21 on slide blocks body 2, as the location and the fixing usefulness of end cap 3 and scraping brushing device 7, screw 22 then is used for fixing scraping brushing device 8, and the screw 23 of slide blocks body 2 is used for the device worktable.As Fig. 7, shown in 7A and the 7B, has pair of U-shaped steel ball turning slot 24 in the end cap 3, being used to guide the load steel ball enters among the zero load steel ball circulation through hole 17 of slide blocks body 2, steel ball can be back to Goethe's shape steel ball groove 12 through the U-shaped steel ball turning slot 24 of opposite side end cap 3 again through this, is positioned at the steel ball circle 6 of guide rail both sides with formation.U-shaped steel ball turning slot 24 has the steel ball rotary path that a semicircle and a straight line are formed, and can hold five steel balls, pushes back the commentaries on classics principle mutually with steel ball, finishes the revolution of steel ball 6.Steel ball 6 turns round along steel ball turning slot 24 after entering U-shaped steel ball turning slot 24 by Goethe's shape steel bead groove 12, and is rolled into the middle position near end cap 3, enters zero load steel ball circulation through hole 17.The steel ball turning slot of existing straight ball-guide can only hold three steel balls usually.Therefore, straight ball-guide of the present utility model bears load with more steel ball, can promote the working life of guide rail.In addition, because the straight line path end of U-shaped steel ball turning slot 24 is near the middle position of end cap 3, make 170 fens the central positions of zero load steel ball circulation through hole be connected with this end, and can not be positioned at the concentrated position of stress of corner above this body Goethe shape steel ball groove near slide blocks body 2.
The top of the U-shaped steel ball turning slot 24 of end cap 3 is equipped with a cover plate 4, as shown in Figure 8, in order to keep steel ball 6 in steel ball turning slot 24, be used for central circular hole 32 places that are connected with Goethe's shape steel bead groove 12 in the cover plate 4, has the circular arc chamfering 33 that to promote the smooth-going degree of steel ball circuit, and cover plate 4 also can guarantee that lubricant oil is positioned at each steel ball tow-away zone, it can not leaked outside pollute.Also be provided with locating stud 25 on the end cap 3 in order to guaranteeing the relative position between U-shaped steel ball turning slot 24, zero load steel ball circulation through hole 17 and the Goethe's shape steel ball groove 12, and form the steel ball circulating path of a perfect straight ball-guide.End cap 3 can lubricate outside the oil cavity 26 and oilhole 27 and U-shaped steel ball turning slot 24 and cover plate 4 of steel ball lubricating oil filling by each steel ball tow-away zone except that having, also have the catching groove 28 that is used for fixing load steel ball retainer 5 and be used for fixing the through hole 29 of end cap 3 on slide blocks body 2,34 of screws are used for the device oil nozzle.In addition, take this near oilhole 27 at the position that U-shaped steel ball turning slot 24 is connected with zero load steel ball circulation through hole 17, can shorten the length of oil cavity 26, and can promote lubrication effect.
Claims (6)
1, a kind of straight ball-guide that is used to produce the linear guiding motion of smooth-going and low surface friction drag is characterized in that: it is made up of a rail bar, a slide blocks body, a pair of end cap, a pair of load steel ball retainer, two circle steel ball circles, the scraping brushing device of a pair of end cap outer end and the scraping brushing device of a pair of slide blocks body bottom; Respectively has a straight line Goethe shape steel ball groove on the rail bar outside and the relative slide blocks body, near respectively being provided with a zero load steel ball circulation through hole on the position above the straight line Goethe shape steel ball groove of slide blocks body, end cap is equipped with at slide blocks body two ends, has in the end cap to be used to guide ball and to enter zero load steel ball circulation through hole and drawn by this through hole and be back to straight line Goethe shape steel ball groove is finished the linear guiding motion between slide blocks body and rail bar to the steel ball circle with this respectively to form a steel ball circle in the guide rail both sides opposed U-shaped steel ball turning slot; The U-shaped steel ball turning slot of end cap top has one to be used to guarantee that steel ball is positioned at the U-shaped turning slot and to make lubricant oil enter oil cavity and make it be maintained at the cover plate of each steel ball tow-away zone via the oil nozzle of end cap outer end.
2, straight ball-guide according to claim 1 is characterized in that: in the end cap that contains U-shaped steel ball turning slot, the revolution of guide rail both sides steel ball pushes away mode mutually with steel ball and turns round and finish; Is the steel ball rotary path that a semicircle and a straight line are formed and steel ball is directed to the top by Goethe's shape steel ball groove of below near the U-shaped steel ball turning slot in the zero load steel ball circulation through hole at slide blocks body center position.
3, straight ball-guide according to claim 1 is characterized in that: wherein in the zone of U-shaped steel ball turning slot, oil cavity and the oilhole of end cap, be provided with one make steel ball remain in the U-shaped steel ball turning slot, and can make lubricant oil remain on the cover plate that can not leak outside and pollute in each steel ball tow-away zone; Has the circular arc chamfering that to promote steel ball circuit smoothness on two semi-circular ends of cover plate and central two circular holes.
4, straight ball-guide according to claim 1 is characterized in that: be used to prevent to be positioned at the load steel ball retainer that the steel ball of Goethe's shape steel ball groove comes off and be clamped between two end cap.
5, straight ball-guide according to claim 1, it is characterized in that: wherein respectively have a scraping brushing device in the two end cap outer end, this scraping brushing device is coated on a steel disc surface by rubber and constitutes, and the contact position of this curette and rail bar has a function that is used to produce spring sheet, make this position of scraping brushing device be close to rail bar, and can allow foreign matter move and can not be deposited in groove on the scraping brushing device along groove.
6, straight ball-guide according to claim 1 is characterized in that: wherein be provided with a scraping brushing device in slide blocks body bottom, this scraping brushing device also has a groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94211995 CN2188449Y (en) | 1994-04-23 | 1994-04-23 | Linear ball guide rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94211995 CN2188449Y (en) | 1994-04-23 | 1994-04-23 | Linear ball guide rail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2188449Y true CN2188449Y (en) | 1995-02-01 |
Family
ID=33828983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94211995 Expired - Lifetime CN2188449Y (en) | 1994-04-23 | 1994-04-23 | Linear ball guide rail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2188449Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100333874C (en) * | 2003-09-05 | 2007-08-29 | 上银科技股份有限公司 | Linear sliding rail having rolling body maintaining device |
| CN100359192C (en) * | 2001-07-27 | 2008-01-02 | 依纳-谢夫勒两合公司 | Linear rolling bearing element |
| CN100439731C (en) * | 2003-11-20 | 2008-12-03 | Thk株式会社 | Guide device |
| CN104084802A (en) * | 2014-06-13 | 2014-10-08 | 江苏爱波机械制造有限公司 | Double-wire rail structure for cutting processing |
| CN104495611A (en) * | 2014-12-15 | 2015-04-08 | 无锡市新华起重工具有限公司 | Detachable star wheel structure of floating bearing beam |
| CN105465172A (en) * | 2014-09-05 | 2016-04-06 | 上银科技股份有限公司 | Linear ball sliding rail with high pressing rigidity |
| CN105485163A (en) * | 2014-09-17 | 2016-04-13 | 上银科技股份有限公司 | Linear sliding rail with six columns of rolling balls |
| CN112222968A (en) * | 2020-10-20 | 2021-01-15 | 宁波高研精密机械有限公司 | Centerless grinding machine of high accuracy translation |
-
1994
- 1994-04-23 CN CN 94211995 patent/CN2188449Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100359192C (en) * | 2001-07-27 | 2008-01-02 | 依纳-谢夫勒两合公司 | Linear rolling bearing element |
| CN100333874C (en) * | 2003-09-05 | 2007-08-29 | 上银科技股份有限公司 | Linear sliding rail having rolling body maintaining device |
| CN100439731C (en) * | 2003-11-20 | 2008-12-03 | Thk株式会社 | Guide device |
| CN104084802A (en) * | 2014-06-13 | 2014-10-08 | 江苏爱波机械制造有限公司 | Double-wire rail structure for cutting processing |
| CN105465172A (en) * | 2014-09-05 | 2016-04-06 | 上银科技股份有限公司 | Linear ball sliding rail with high pressing rigidity |
| CN105465172B (en) * | 2014-09-05 | 2017-11-07 | 上银科技股份有限公司 | Height pushes rigid linear ball slide rail |
| CN105485163A (en) * | 2014-09-17 | 2016-04-13 | 上银科技股份有限公司 | Linear sliding rail with six columns of rolling balls |
| CN105485163B (en) * | 2014-09-17 | 2017-12-19 | 上银科技股份有限公司 | Six row ball-type linear slide rails |
| CN104495611A (en) * | 2014-12-15 | 2015-04-08 | 无锡市新华起重工具有限公司 | Detachable star wheel structure of floating bearing beam |
| CN112222968A (en) * | 2020-10-20 | 2021-01-15 | 宁波高研精密机械有限公司 | Centerless grinding machine of high accuracy translation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |