CN101280802B - Short stroke ball sliding bush - Google Patents
Short stroke ball sliding bush Download PDFInfo
- Publication number
- CN101280802B CN101280802B CN2008100493535A CN200810049353A CN101280802B CN 101280802 B CN101280802 B CN 101280802B CN 2008100493535 A CN2008100493535 A CN 2008100493535A CN 200810049353 A CN200810049353 A CN 200810049353A CN 101280802 B CN101280802 B CN 101280802B
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- China
- Prior art keywords
- ball
- cover
- sliding bush
- short stroke
- overcoat
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Abstract
The invention pertains to a mechanical sliding bush. Provided is a short stroke ball sliding bush which consists essentially of an outer housing (7), an inner housing (3), a ball platen (8), balls and a ball retainer (9); wherein, the external surface of the inner housing (3) with a round section is provided with a bar V-shaped groove; the internal surface of the outer housing (7) is round and the bar holes arranged on the internal surface is provided with the ball platen (8); the surface opposite to the inner housing (3) of the ball platen (8) is provided with a bar V-shaped groove; the balls are arranged in the holes circumferentially distributed as three rows on the tube wall of the tube type ball retainer arranged between the outer housing (7) and the inner housing (3); one row of the balls are arranged in the V-shaped grooves of the inner housing and the ball platen (8), the balls of the other two rows form point contacts with the inner diameter surface of the outer housing and the outer diameter surface of the inner housing. The sliding bush is characterized by good center-aligning ability, small force of friction, simple installation technology and being easy for processing and realizing.
Description
Technical field
The invention belongs to mechanical sliding sleeve, relate generally to a kind of short stroke ball sliding bush.
Background technique
Original intention of the present invention is in order to solve in the push rod kinetic friction of post rod type dilatometer and the problem of centering, and in existing post rod type dilatometer, its test method is the expansion of measuring sample with the relative movement of a load sample pipe and a push rod; The sample that is about to a known length is placed in the load sample pipe, one end of sample props up the closed end of load sample pipe, one end of push rod presses closer the other end of sample, the load sample pipe that sample is housed is placed in the oven heats, and the sample expanded by heating will cause the relative movement of push rod and load sample pipe.By measuring expansion coefficient that relative displacement that load sample pipe and push rod be positioned at the normal temperature area end measures sample indirectly etc.The method needs a known standard specimen with convenient the system variant constant to be proofreaied and correct.It is zero for the most desirable that above-described post rod type thermal expansion is used to install the stiction of movable device of load sample pipe and push rod and kinetic friction force, because frictional force can make push rod that sample is applied an active force, this active force is opposite with the expansive force of sample, if active force greater than the expansive force of sample, can't extend during the sample expanded by heating.
In order to solve the kinetic friction force of push rod, various countries are when carrying out the dilatometer design.What at first will solve is exactly the sliding problem that the motion device of push rod is installed.As the instrument of German NETZSCH, adopted the sliding sleeve that is assembled into 6 little radial bearings, this sliding sleeve is that the whole world is comparatively advanced at present.Its method is: the load sample pipe is fixed in the outer of sliding sleeve puts, overcoat is fixed on the support and does not move, and puts in push rod is fixed on, and interior cover is with respect to outer interplanting axial motion.6 radial bearings have been installed on overcoat, be divided into two groups, between group and the group certain distance arranged, 3 bearings are one group, become hexagonal angle to arrange along circumference, the inner ring of bearing is connected with the overcoat of sliding sleeve by an axle, and the inner ring of bearing does not rotate, and the outer ring of bearing is rotatable, surround a triangle sliding sleeve, the interior cover that is used for installing push rod passes from this triangle sliding sleeve, for cover in not allowing moves in a circle, is processed with 3 road chutes at the outer surface of interior cover.In the chute that overlaps in the outer ring of bearing enters into.The advantage of this sliding sleeve is owing to be round 120 ° of triangle sliding sleeve motion sliding sleeves design, push rod better to neutrality.Adopt bearing as the slip medium, its frictional force is less, and stroke is long, but the processed finished products rate of this sliding sleeve is low, the installation difficulty of 6 little bearings, and there are friction in the edge of the outer ring of bearing and the chute of interior cover, the assemblage gap of whole sliding sleeve can't be transferred to perfect condition, because of the reason of its generation various.
Except adopting above-mentioned sliding sleeve, the employing that has the design of slide block, promptly the fixed base of slide block and load sample pipe link, push rod and slide block sample connection.The shortcoming of slide block mainly is that frictional force is bigger.Useful linear bearing is also selected linear bearing for use exactly as the push rod motion device of the thermodilatometer of U.S. orton company, and the stroke of linear bearing is long, but bad to the center, and the front end of push rod promptly easily swings with the contact jaw of sample.And linear bearing is the circulating ball structure, all can have frictional force to produce between ball and ball and between ball and raceway.These frictions all will produce negative influence to the test performance of instrument.
Summary of the invention
Purpose of the present invention promptly is to propose a kind of short stroke sliding sleeve, and it is had the characteristics that neutrality is good, frictional force is little, mounting process is simple and be easy to process realization.
The present invention finishes the technological scheme that its invention task taked: the short stroke sliding sleeve that is proposed mainly is made up of overcoat, interior cover, ball pressing plate and ball and ball distance ring; Wherein, the cross section has bar shaped V-type groove for circular its outer surface of interior cover, and the internal surface of overcoat is provided with the ball pressing plate for the bar hole that is set on circular and its wall and makes the ball pressing plate internally have bar shaped V-type groove on the face of cover mutually; On its tube wall of tubular type ball distance ring between overcoat and the interior cover, three rounds are circumferentially arranged and in every round, ball is set, wherein row's ball is positioned at the V-type groove of cover, ball pressing plate, and two row's balls constitute point with outer casing internal diameter face, the outer diametric plane of interior cover and contact.
Three rounds that set on the described ball distance ring tube wall are uniformly distributed along the circumference, and promptly to cross the angle in the retainer center of circle be 120 ° at the center of adjacent round.
Its every row of three rounds that set on the described ball distance ring tube wall has two holes.
Its rear and front end of cover has before the interior cover that limits its stroke effect back-up ring behind the back-up ring, interior cover respectively in described.
Its front end and back end of described overcoat is respectively arranged with in order to front screen, the backboard that prevents that ball distance ring from skidding off, and front screen, backboard play the effect of cover stroke in the restriction simultaneously.
Be provided with preceding dust-proof cushion between cover and the front screen in described, be provided with the back dust-proof cushion between described interior cover and the backboard, suffer the zone that enters the ball place in order to prevent dirt.
Short stroke sliding sleeve principle proposed by the invention is clear, mounting process is simple, processing realizes easily, frictional force is minimum, energy automatic centering during horizontal motion, fabulous to neutrality, be the desirable sliding sleeve that is used for the post rod type thermodilatometer, also can be used for the differential measure portion of test instruments such as high temperature load, glutinous change, ess-strain.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the A-A sectional drawing of Fig. 1.
Among the figure, 1, push rod, 2, back-up ring before the interior cover, 3, interior cover, 4, front screen, 5, preceding dust-proof cushion, 6, baffle plate set screw, 7, overcoat, 8, the ball pressing plate, 9, retainer, 10, first row ball, 11, backboard, 12, back dust-proof cushion, 13, the push rod fastening screw trip bolt, 14, the back back-up ring of interior cover, 15, second row ball, 16, third row's ball, 17, ball pressing plate fastening screw trip bolt.
Embodiment
The embodiment who provides in conjunction with the accompanying drawings is illustrated the present invention, but does not constitute any limitation of the invention:
As shown in Figure 1 and Figure 2, sliding sleeve of the present invention mainly is made up of interior cover 3, overcoat 7, ball pressing plate 8, ball and ball distance ring 9.
Be uniformly distributed with three rounds on the tube wall of retainer 9 along the circumference, promptly to cross the angle in retainer 9 centers of circle be 120 ° at the center of adjacent round, and the hole on every row is two, can respectively put into a ball.The retainer 9 that is placed with ball is installed between overcoat 7 and the interior cover 3.The v type groove of cover 3 in wherein first row ball 10 enters into, ball pressing plate 8 covers on this row ball, and promptly first row ball 10 is arranged in and overlaps 3 and the v type groove that set of ball pressing plate 8.Make this row's bearing play the radial location effect, do not produce rotation when being enclosed within motion in making with respect to overcoat.Four holes are arranged on the ball pressing plate 8, link to each other with overcoat 7 by 4 ball pressing plate fastening screw trip bolts 17.Second row ball 15 directly contacts with the internal surface of overcoat 7 and the outer surface of interior cover 3 with third row's ball 16.When interior cover 3 is done axial motion with respect to overcoat 7, this ball will roll.
When using this sliding sleeve, should make the two ends of retainer 9 identical before using with the interval between front screen 4 and the backboard 11 as far as possible.The stroke that seesaws of cover 3 is basic identical in can making like this.The desirable installation of ball pressing plate is to make each ball pressure for minimum and can both roll simultaneously.If accomplish this point, this sliding sleeve fabulous to neutrality, interior cover 3 is done also minimum with respect to the axial motion frictional force of overcoat 7.
Even ball pressing plate 8 after installation, can't be eliminated the gap between ball and the interior overcoat fully, when this sliding sleeve horizontal application, because the deadweight effect of interior cover 3 and push rod 1 will make push rod produce automatic centering.The motion of push rod front end to neutrality also without a doubt; When interior cover 3 axially moves with respect to overcoat 7, except that the small part ball is unsettled, have most of ball and roll, the kinetic friction force of interior cover 3 is very little in the same old way.
The surface of V-type groove need be through grinding to guarantee the smooth and smooth of its surface on the internal surface of the outer surface of interior cover and the surface of V-type groove thereof, overcoat, the ball pressing plate.
Claims (6)
1. a short stroke ball sliding bush is characterized in that: mainly be made up of overcoat (7), interior cover (3), ball pressing plate (8) and ball and ball distance ring (9); Wherein, the cross section has bar shaped V-type groove for circular its outer surface of interior cover (3), and the internal surface of overcoat (7) is provided with ball pressing plate (8) for the bar hole that is set on circular and its wall and makes ball pressing plate (8) internally have bar shaped V-type groove on the face of cover (3) mutually; Being positioned on its tube wall of tubular type ball distance ring between overcoat (7) and the cover (3) circumferentially has three rounds and at every round ball is set, wherein row's ball is positioned at the V-type groove of cover, ball pressing plate (8), and two row's balls constitute point with outer casing internal diameter face, the outer diametric plane of interior cover and contact.
2. a kind of short stroke ball sliding bush according to claim 1 is characterized in that: three rounds that set on described ball distance ring (9) tube wall are uniformly distributed along the circumference, and promptly to cross the angle in the retainer center of circle be 120 ° at the center of adjacent round.
3. a kind of short stroke ball sliding bush according to claim 1 is characterized in that: its every row of three rounds who sets on described ball distance ring (9) tube wall has two holes.
4. a kind of short stroke ball sliding bush according to claim 1 is characterized in that: cover (3) its rear and front end has the preceding back-up ring (2) of the interior cover that limits its stroke effect, interior cover back back-up ring (14) respectively in described.
5. a kind of short stroke ball sliding bush according to claim 1, it is characterized in that: its front end and back end of described overcoat (7) is respectively arranged with in order to front screen (4), the backboard (11) that prevents that ball distance ring from skidding off, and front screen, backboard play the effect of cover stroke in the restriction simultaneously.
6. a kind of short stroke ball sliding bush according to claim 1, it is characterized in that: be provided with preceding dust-proof cushion (5) between cover (3) and the front screen (4) in described, be provided with back dust-proof cushion (12) in described between cover (3) and the backboard (11), suffer the zone that enters the ball place in order to prevent dirt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100493535A CN101280802B (en) | 2008-03-12 | 2008-03-12 | Short stroke ball sliding bush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100493535A CN101280802B (en) | 2008-03-12 | 2008-03-12 | Short stroke ball sliding bush |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101280802A CN101280802A (en) | 2008-10-08 |
| CN101280802B true CN101280802B (en) | 2010-08-25 |
Family
ID=40013421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100493535A Expired - Fee Related CN101280802B (en) | 2008-03-12 | 2008-03-12 | Short stroke ball sliding bush |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101280802B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108457982A (en) * | 2018-04-16 | 2018-08-28 | 盐城工学院 | Track-type facilities |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2343697A1 (en) * | 1973-08-30 | 1975-03-13 | Aeg Elotherm Gmbh | Guide for linear ball bearing to prevent rotation - esp. useful for tool guide of spark erosion machines |
| CN2071721U (en) * | 1990-02-26 | 1991-02-20 | 浙江景宁县新华轴承厂 | Stroke ball bearing |
| GB2411930A (en) * | 2004-03-08 | 2005-09-14 | Ford Global Tech Llc | Driveshaft plunging units |
| CN101006278A (en) * | 2004-08-16 | 2007-07-25 | Gkn动力传动国际有限公司 | Longitudinal displacement unit with a security cage |
-
2008
- 2008-03-12 CN CN2008100493535A patent/CN101280802B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2343697A1 (en) * | 1973-08-30 | 1975-03-13 | Aeg Elotherm Gmbh | Guide for linear ball bearing to prevent rotation - esp. useful for tool guide of spark erosion machines |
| CN2071721U (en) * | 1990-02-26 | 1991-02-20 | 浙江景宁县新华轴承厂 | Stroke ball bearing |
| GB2411930A (en) * | 2004-03-08 | 2005-09-14 | Ford Global Tech Llc | Driveshaft plunging units |
| CN101006278A (en) * | 2004-08-16 | 2007-07-25 | Gkn动力传动国际有限公司 | Longitudinal displacement unit with a security cage |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101280802A (en) | 2008-10-08 |
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| C06 | Publication | ||
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100825 Termination date: 20170312 |