CN1743693A - Rolling element retaining device and its manufacturing method - Google Patents
Rolling element retaining device and its manufacturing method Download PDFInfo
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- CN1743693A CN1743693A CN 200410074069 CN200410074069A CN1743693A CN 1743693 A CN1743693 A CN 1743693A CN 200410074069 CN200410074069 CN 200410074069 CN 200410074069 A CN200410074069 A CN 200410074069A CN 1743693 A CN1743693 A CN 1743693A
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- rolling element
- holding device
- spacer portion
- retaining device
- element retaining
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Abstract
This invention refers to a rolling element holding device, which contains partition part and connection part. Said invention features the partition and connection parts are integral structure, wherein the partition is a hollow structure and separating rolling by circular structure, the connection part is a long strip shape integrally jointing partition part. The making mould of said invention is a mould with penetrated shaping pin.
Description
Technical field
The present invention is relevant a kind of rolling element retaining device, and it is a kind of maintenance and guide device of rolling element, mainly is to apply on the straight line transmission component; Generally speaking the straight line transmission component is to be applied in the mechanisms such as toolroom machine, electronics, automation equipment, semiconductor equipment.
Background technique
Formerly in the straight line transmission component of technology, the retainer of rolling element can be divided into two big classes generally: the retainer of first kind design is an independent individuality, and another kind of retainer is for linking the design of many independent parts.The straight line transmission component of utilization first kind retainer design needs in regular turn each rolling element and each single retainer to be inserted in the slide blocks alternately when assembling, and assembling process is quite consuming time takes a lot of work; Moreover, need between single retainer and the rolling element suitably contact, interval as retainer and rolling element is excessive, retainer easily breaks away from two rolling elements, and retainer may touch the backflow wall and produce to reflux and to turn to the situation that has some setbacks when backflow turns to, the severe patient even the stuck phenomenon that causes refluxing, but if excessively closely contact, then can produce tangible surface friction drag again between retainer and the rolling element, have some setbacks and its backflow is turned to.Therefore be not easy on the gap control between single retainer and rolling element, and it is well known, after retainer and the rolling element friction, retainer can produce abrasion and the gap is increased, even the gap during the control new product that event can be accurate between single retainer and rolling element, but the straight line transmission component still can the big problem generation of gapped change after using for a long time.
Next, the retainer design (for example U.S. USP5988883 number, Japanese specially permit open H05-052217 number or H05-231432 number) of the second class retainer for linking many independent parts.In these prior arts, it links retainer is that spacer block is connected with flexible coupling chain, rolling element is coated in the space of two spacer blocks to roll, because each spacer block is bonded chain and links the problem that breaks away from so do not have excesssive gap; Yet manufacture of this binding retainer must place mould with rolling element earlier, makes in the mode that the bag molding material penetrates, and the material property of this mode and ejaculation mechanical property all must have requirement for height, have relatively improved manufacture cost; And because its more special manufacture, so being tight with the spacer block that links retainer, rolling element contacts, and spacer block is the area of contact of closed cross-sectional configuration and the rolling element lubricant oil that greatly also can't store or circulate, and make the rolling resistance of rolling element excessive, easily cause the situation that rolling element produce to slide and influence the fluency of start.In this design, owing to be that mould with a ball-type removes molded aforesaid binding retainer in the manufacture process, therefore the surface of contact that links between retainer and rolling element is concave spherical surface in, and contacting between interior concave spherical surface and rolling element almost is whole comprehensive engagement; And well known, the lubrication state of whole comprehensive engagement is very poor, and its frictional resistance can be very big, therefore causes the moving resistance of straight line transmission component to become big.Though lubricated demand has been considered in some design, concave spherical surface not exclusively fits in rolling element and (for example on interior concave spherical surface ripple glaze is set in making during design, or between the radius of curvature of concave spherical surface and rolling element small difference is arranged in making), and have a micro gap in the middle of making interior concave spherical surface and rolling element, lubricant grease is flowed into, and reduce frictional resistance; The material that just links retainer is plastics or rubber material, itself also having abrasion takes place, and the elastic deformation amount of plastics or rubber material is very big, it is big that pressure when between interior concave spherical surface and rolling element becomes, or the straight line transmission component is through after a while use and when abrasion or distortion take place in concave spherical surface in making, promptly form the comprehensive engagement state between interior concave spherical surface and rolling element and cause frictional resistance to increase, light then increase the slip resistance of straight line transmission component, severe patient even cause linking the coupling chain fracture of retainer.
Moreover, the manufacture of the binding retainer of prior art is the core as die forming with rolling element, before shaping, rolling element is inserted, carry out the plastics injection molding, this kind manufacture can produce following shortcoming: 1. the rolling element number of being inserted changes according to the size of retainer, change is many relatively than long rolling unit of being inserted when retainer, and production institute is time-consuming elongated; 2. this kind mode is owing to be to use the two direction demouldings up and down, and the indent amount of therefore interior concave spherical surface is limited, and it is too big to cave in, and the radius of curvature of the interior concave spherical surface that manufactures and rolling element are close; So comprehensive engagement between concave spherical surface and rolling element in when surface of contact wears away or be stressed greatly, can causing, and increase surface friction drag; 3. because the design of last bottom knockout, so can't make the phase through hole at the spacer block of adjacent retainer centre; Have many good qualities though through hole is set in spacer block, common binding retainer does not all have via design, can't make this through hole yet; 4. the manufacture of previous binding retainer needs many rolling element is inserted in the mould, makes very labor intensive.
In sum, real necessity that all has improvement to progress greatly of prior art rolling element retaining device and manufacture method thereof.
Summary of the invention
The object of the present invention is to provide a kind of rolling element retaining device is a kind of holding device that links design, the structure that this holding device is one of the forming, make holding device in the path of whole rolling element shuttling movement, can be more continuously and keep smoothly and guide rolling element motion.Shortcoming on the common binding retainer performance, rolling element retaining device of the present invention will be separated the ring structure that rolling element is designed to hollow especially in linking retainer, this ring structure be shaped as a through hole, can preserve lubricant grease in the through hole, and make rolling element can obtain good lubricating, and the through hole does not contact fully with rolling element, so even friction or pushing take place between rolling element and rolling element retaining device of the present invention, through hole all keep getting along well rolling element contact, and remain with lubricant grease.So make between rolling element retaining device of the present invention and rolling element and can possess good interval and lubrication effect for a long time.
Another object of the present invention is to provide the integrally formed structure with rolling element retaining device, be designed to simple configuration, its main structure is divided into two-part: spacer portion and joint.The design major character of spacer portion is a hollow annular structure, and separates rolling element with this ring structure; And joint is a bar-shape, the holding device of the chain form structure that spacer portion is linked into an integrated entity.
A further object of the present invention is to provide the preferable intensity of joint of holding device, symmetry can be connected the structure of two adjacent spacer portion, is designed to cooperate the profile of rolling element.And for making holding device have greater functionality, and design one through hole is forming hollow annular structure in the middle of will the spacer portion of holding device, and its side cross-section is designed to rectangle, to reduce the area of contact of spacer portion and rolling element.
As follows for reaching the technological scheme that the foregoing invention purpose adopted: a kind of rolling element retaining device, it can be placed in most rolling elements in its space in regular turn, this structure mainly comprises: spacer portion is hollow annular structure, and separates above-mentioned rolling element with this ring structure; Linking department is a bar-shape, the holding device of the chain form structure that above-mentioned spacer portion is linked into an integrated entity.
The side cross-section of spacer portion is a rectangle, to reduce the area of contact of spacer portion and rolling element.
Above-mentioned hollow annular structure is a ring-type hollow circular tube.
The making method of described rolling element retaining device is the profile mould that a forming pin is run through whole holding device, makes the spacer portion of holding device form hollow annular structure.
The making method of described rolling element retaining device, it is at first inserted shaping pin in the bed die, cover backform piece again and become a complete jetting mold with cast gate, then the plastics material is poured in this jetting mold, holding device is shaped, and during the demoulding, removes shaping pin earlier and slough backform again, in bed die, eject holding device at last, can finish rolling element retaining device.
The making method of described rolling element retaining device is inserted rolling element with the holding device of having finished, and makes rolling element keep separating by the holding device guiding.
Because the characteristic of structure of the present invention, when turning to, backflow can make that the linking department of holding device is bent state, and make and form an opening between spacer portion and the rolling element gradually, the middle through hole of spacer portion and the space of backflow turning path are communicated with each other, and lubricant oil is brought in the through hole of spacer portion, when turning to, its backflow finishes and when moving then in straight line path, rolling element surrounds a confined space again gradually with through hole, so confined space can be oil storage space with effective storage lubricant oil, when the rolling element moving linearly, the lubricant oil that is stored in the oil storage space of through hole can help rolling element to produce oil film, to increase lubricated and to reduce resistance, improve the serviceability and the smooth degree of holding device.
Then, the present invention uses the mode of injection molding to make holding device, holding device can be penetrated by general bed die with its profile and the synthetic profile mould of backform, right spy of the present invention is run through the profile mould of whole holding device with a forming pin, makes the spacer portion of holding device form hollow annular structure.
The manufacture method of holding device of the present invention is used the mode of injection molding, and jetting mold of the present invention is mainly closed by backform, shaping pin and bed die piece and forms.At first shaping pin is placed in the bed die, cover backform piece again and become a complete jetting mold with cast gate, plastics are poured in this jetting mold then, holding device is shaped, and during the demoulding, remove shaping pin earlier and slough backform again, in bed die, eject holding device at last, can finish rolling element retaining device.The benefit of this kind holding device mold design is on bed die and the backform, can form and support and the fixing configuration of forming pin, and the bridge pier of the similar bridge of this kind mould configuration, when penetrating, can produce enough support forces and help the forming pin opposing to penetrate pressure, improve the durability and the success rate of making finished product of mould.Therefore the manufacture method of holding device of the present invention can be produced fast and can be lowered degree of difficulty in the manufacturing, but makes manufacture cost certain degree ground get reduction.
Further understand feature of the present invention and technology contents for convenience, please consult following relevant embodiments of the present invention in detail, however this mode of execution and graphic only for explanation and with reference to usefulness, but not in order to the present invention is done any restriction.
Description of drawings
Fig. 1 is the schematic perspective view of rolling element retaining device of the present invention
Fig. 2 is the thin portion generalized section of Fig. 1
The schematic representation that Fig. 3 refluxes and turns to for rolling element retaining device of the present invention
Fig. 4 is the jetting mold schematic representation of rolling element retaining device of the present invention
Fig. 5 is the shoot mode schematic representation of rolling element retaining device of the present invention
Surface friction drag comparison diagram when Fig. 6 is used in the straight line transmission component for rolling element retaining device
The primary component symbol description
10 holding devices, 11 spacer portion
111 through holes, 112 holding points
113 openings, 12 linking departments
20 rolling elements, 30 backforms
31 cast gates, 40 shaping pins
50 bed dies, 51 grooves
60 backflow turning paths, 70 plastics filling ports
Embodiment
Fig. 1 is the schematic perspective view of rolling element retaining device of the present invention; Fig. 2 is the thin portion generalized section of Fig. 1; Wherein holding device 10 is placed in most rolling elements 20 in its space in regular turn.The structure of this holding device 10 among the figure mainly comprises: spacer portion 11 and linking department 12; Spacer portion 11 wherein is provided with through hole 111 vertically, and makes spacer portion 11 be hollow annular structure, and with ring structure adjacent rolling element 20 is separated both sides in spacer portion 11.For the area of contact that makes 20 of spacer portion 11 and rolling elements reduces, the present invention is designed to rectangle with the side cross-section of spacer portion 11, the then only remaining holding point of the contact area of spacer portion 11 and rolling element 20 112 places, so making rolling element 20 and contacting of spacer portion 11 is the line contact of a ring-type, to reduce the area of contact of spacer portion 11 and rolling element 20, this moment, the space of through hole 111 was promptly surrounded the space that can deposit lubricant grease by rolling element 20; Linking department 12 then is a bar-shape, the holding device 10 of the chain form structure that it links into an integrated entity adjacent spacer portion 11.Because the contact position of spacer portion 11 and rolling element 20 is only at very little holding point 112 places of scope, and having a through hole 111,20 of adjacent rolling elements can deposit lubricant grease, when even event increases surface of contact in holding point 112 generation abrasion gradually, it is still very limited that spacer portion 11 and 20 of rolling elements can increase the scope that contacts, at least in the zone of through hole 111, rolling element 20 promptly can not rub with spacer portion 11, and also have lubricant grease in the through hole 111, and spacer portion 11 and 20 good lubricating effect of rolling element are provided.
The schematic representation that Fig. 3 refluxes and turns to for rolling element retaining device of the present invention; Rolling element 20 wherein and holding device 10 are in the state that refluxes and turn to for entering backflow turning path 60, this moment, the linking department 12 of holding device 10 was a bent state, spacer portion 11 and rolling element 20 are turned gradually and finish backflow, when it turns, form an opening 113 between the through hole 111 of spacer portion 11 and the rolling element 20 gradually, the through hole 111 and the space of backflow turning path 60 are communicated with each other, lubricant oil in the backflow turning path 60 can be brought in the through hole 111 of spacer portion 11, when turning to, its backflow finishes and when moving then in straight line path, rolling element 20 is about to through hole 111 and surrounds a confined space again, so confined space can be oil storage space with effective storage lubricant oil.
For making the rolling element retaining device with through hole of the present invention, need to use special making method so that through hole partly can the demoulding; Fig. 4 is the jetting mold schematic representation of rolling element retaining device of the present invention; Fig. 5 is the shoot mode schematic representation of rolling element retaining device of the present invention; Wherein jetting mold is mainly combined by backform 30, shaping pin 40 and bed die 50; The profile mould of holding device 10 is synthetic by backform 30 and bed die 50, and shaping pin 40 runs through the profile mould of whole holding device; At first as Fig. 5 a, earlier shaping pin 40 is placed in the groove 51 of bridge pier of bed die 50 similar bridges; As Fig. 5 b, on the bed die 50 of inserting shaping pin 40, cover backform 30 and form a complete jetting mold then with cast gate 31; Then as Fig. 5 c, the cast gate 31 of plastics filling port 70 involutory backforms 30 is poured into the plastics material, make holding device 10 shapings; During the demoulding, remove shaping pin (not drawing) earlier and slough backform 30 more again, can in bed die 50, completed holding device 10 be ejected, as Fig. 5 e as Fig. 5 d; At last rolling element 20 is inserted in the holding device 10 that has been shaped,, make rolling element 20 keep separating by holding device 10 guidings as Fig. 5 f.
Surface friction drag comparison diagram when Fig. 6 is used in the straight line transmission component for rolling element retaining device, transverse axis among the figure shows the accumulation displacement distance of straight line transmission component, unit is a kilometer, passes through axle and shows the surface friction drag of straight line transmission component when this accumulation displacement distance, and unit is a kilogram weight; The test condition of straight line transmission component is applied load not, come return multiple moving with the condition of one meter of top speed per second, per hour once oily, and in accumulation displacement distance at 50 kilometers, 100 kilometers, 150 kilometers ... the time each measure to move the surface friction drag of this straight line transmission component.Measurement shows, concave spherical surface in simple and the rolling element retainer (being denoted as A among the figure) that do not have a through hole are after through 50 to 100 kilometers tests, the situation of break-in takes place between the rolling element of straight line transmission component and its surface of contact, because the generation of friction, amount of interference between rolling element and its surface of contact is reduced, so surface friction drag has small reducing, but tangible ascendant trend is arranged then subsequently, main cause is after interior concave spherical surface wears away, interior concave spherical surface gradually with rolling element generation comprehensive engagement, because lack of lubrication causes surface friction drag to rise gradually; Near 450 to 500 kilometers, the surface friction drag ascendant trend relaxes gradually, should be between interior concave spherical surface and rolling element due to oneself several comprehensive engagements.Show the test result (being denoted as B among the figure) with rolling element retaining device of through hole of the present invention among the figure simultaneously, because having abrasion between rolling element and its surface of contact equally takes place, therefore have the situation that surface friction drag descends equally, but trend is stable gradually immediately, and the situation that in 500 kilometers test stroke, does not have surface friction drag to rise.
In sum, this case not only comprises the rolling element retaining device design of innovation, really belongs to innovation on spatial shape, and can more common technology promote the above-mentioned multinomial effect and the resistance of reducing friction; And the present invention also provides the manufacture method of an innovation, so that rolling element retaining device of the present invention can be made easily.Therefore the present invention should fully meet the legal patent of invention important document of novelty and progressive, files an application in accordance with the law, earnestly asks your office and checks and approves this part application for a patent for invention case, to encourage invention, to feeling moral just.
Claims (6)
1. rolling element retaining device, it can be placed in most rolling elements in its space in regular turn, and this structure mainly comprises:
Spacer portion is hollow annular structure, and separates above-mentioned rolling element with this ring structure;
Linking department is a bar-shape, the holding device of the chain form structure that above-mentioned spacer portion is linked into an integrated entity.
2. rolling element retaining device according to claim 1 is characterized in that: the side cross-section of middle spacer portion is a rectangle, to reduce the area of contact of spacer portion and rolling element.
3. rolling element retaining device according to claim 1 is characterized in that: above-mentioned hollow annular structure is a ring-type hollow circular tube.
4. according to the making method of claim 1,2 or 3 described rolling element retaining devices, it is characterized in that: be the profile mould that a forming pin is run through whole holding device, make the spacer portion of holding device form hollow annular structure.
5. the making method of rolling element retaining device according to claim 4, it is characterized in that: at first shaping pin is inserted in the bed die, cover backform piece again and become a complete jetting mold with cast gate, then the plastics material is poured in this jetting mold, holding device is shaped, and during the demoulding, removes shaping pin earlier and slough backform again, in bed die, eject holding device at last, can finish rolling element retaining device.
6. the making method of rolling element retaining device according to claim 4, it is characterized in that: the holding device that will finish is inserted rolling element, makes rolling element and keep separating by the holding device guiding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410074069 CN1743693A (en) | 2004-09-02 | 2004-09-02 | Rolling element retaining device and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410074069 CN1743693A (en) | 2004-09-02 | 2004-09-02 | Rolling element retaining device and its manufacturing method |
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| Publication Number | Publication Date |
|---|---|
| CN1743693A true CN1743693A (en) | 2006-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410074069 Pending CN1743693A (en) | 2004-09-02 | 2004-09-02 | Rolling element retaining device and its manufacturing method |
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| CN (1) | CN1743693A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105593547A (en) * | 2013-10-02 | 2016-05-18 | 舍弗勒技术股份两合公司 | needle bearing system |
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2004
- 2004-09-02 CN CN 200410074069 patent/CN1743693A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105593547A (en) * | 2013-10-02 | 2016-05-18 | 舍弗勒技术股份两合公司 | needle bearing system |
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