CN202360592U - Special retaining frame of double row angular contact ball bearing for CT (computed tomography) machine - Google Patents
Special retaining frame of double row angular contact ball bearing for CT (computed tomography) machine Download PDFInfo
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- CN202360592U CN202360592U CN2011204101785U CN201120410178U CN202360592U CN 202360592 U CN202360592 U CN 202360592U CN 2011204101785 U CN2011204101785 U CN 2011204101785U CN 201120410178 U CN201120410178 U CN 201120410178U CN 202360592 U CN202360592 U CN 202360592U
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- retaining frame
- angular contact
- retainer
- machine
- bearing
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Abstract
The utility model discloses a special retaining frame of a double row angular contact ball bearing for a CT (computed tomography) machine. The special retaining frame comprises a retaining frame (2) and ball pocket holes (1). The retaining frame comprises two or more single chip retaining frames (2); each single chip retaining frame is provided with a plurality of ball pocket holes (1); and the single chip retaining frames (2) are connected to form a whole. The special retaining frame of the double row angular contact ball bearing for the CT machine has the following advantages that the retaining frame is guided by a rolling body to eliminate the friction and the flap between a bakelite retaining frame and a guiding surface and reduce the noises; the volume of the processing mold of the retaining frame is small, and the mold is easy to process and has high accuracy; the retaining frame is wide in application range and can be applied to steel balls with same diameters and other double row angular contact ball bearings with different pitch circle diameters, and the bakelite or steel punching retaining frame adopts a bearing with one type which only corresponds to one set of mold to result in high cost; the retaining frame is made of nylon materials, and the noise generated between the rolling body and the retaining frame is far less than that generated from brass materials when the bearing runs; and use requirements on high rotation speed and low noise can be met when a high-speed CT machine works.
Description
Technical field
The utility model belongs to the angular contact ball bearing technical field, relates generally to a kind of CT machine with the special-purpose retainer of double-row angular contact bal bearing.
Background technique
Four point touching ball slewing bearing is reliable with its technology maturation, low cost and other advantages, is widely used on the CT machine of low speed type.But can not satisfy high rotating speed, low noise, highi degree of accuracy, low vibration, long-life usage requirement of high speed type CT machine, trace it to its cause, mainly be: 1. the load of high speed type CT machine bearing carrying is bigger, and especially tilting moment is bigger.2. under the tilting moment effect, the steel ball of four point touching ball slewing bearing, retainer assembly in the movement process that rotates a circle, pass in and out stressed loading zone secondary in the opposite direction, and the disturbance that retainer is received is big.At present; Bearing medical or that Industrial CT Machine is used mainly contains wire roller bearing and thin-walled uniform section bearing; High rotating speed, low noise, highi degree of accuracy, low vibration, long-life usage requirement in the time of can satisfying the work of high speed CT machine; But owing to be embedded structure, have that the part processing difficulty is big, cost of production is high, baroque drawback.
Because the steel ball pitch diameter of the biserial angular contact ball turntable bearing of new structure surpasses 1m; The bakelite or the steel pressing cage that can not adopt middle-size and small-size angular contact ball bearing to use, because of bakelite or steel pressing cage adopt on the bearing below the diameter 300mm usually, and the main shaft bearing steel ball pitch diameter that uses on the CT machine surpasses 1m; And the retainer cross section is little; The strength deficiency of bakelite retainer, the rigidity of steel pressing cage is not enough, all has the shortcoming that distortion is big, noise is big.Again because the technical requirements of high rotating speed, low noise is arranged; The brass solid cage that can not adopt large-scale angular contact ball bearing to use because of the brass solid cage that large-scale angular contact ball bearing uses, exists that weight is big, the friction important disadvantages; Be not suitable for the usage requirement of high rotating speed, low noise; Therefore, must design the special-purpose retainer of a kind of double-row angular contact bal bearing, the usage requirement of high rotating speed, low noise when satisfying the work of CT machine.
The model utility content
The purpose of the utility model produces thus, proposes a kind of CT machine with the special-purpose retainer of double-row angular contact bal bearing.Noise can be reduced effectively, the usage requirement of high rotating speed, low noise when satisfying the work of high speed CT machine.
The utility model realizes that the technological scheme that above-mentioned purpose is taked is: a kind of CT machine is used the double-row angular contact bal bearing retainer; Comprise two or two above monolithic retainers; Have a plurality of ball pockets hole on each monolithic retainer, each monolithic retainer is welded to connect the back and forms whole.
The described monolithic retainer of the utility model adopts high nylon 11 of intensity or nylon 12 or nylon EM740 material to process.
The utility model is compared with bakelite or steel pressing cage, has the following advantages: ⑴. and retainer is guided by rolling element, has eliminated the friction between bakelite retainer and the guide surface and bounces, and has reduced noise; ⑵. retainer processing mold volume is little, and mould is prone to processing, precision is high, and injection mould, processing steel pressing cage that processing bakelite retainer needs diameter to surpass 1m need diameter to surpass the press tool of 1m, and technology difficulty is big, cost is high; . retainer is applied widely, can use on other double-row angular contact bal bearing of same diameter steel ball, different pitch diameters, and bakelite or steel pressing cage can only a kind corresponding 1 mold of model bearing, cost is high.
The utility model is compared with the brass solid cage, has the following advantages: ⑴. and retainer is processed by nylon material, and the noise that when bearing operation, produces between rolling element and the retainer is much smaller than brass material; . retainer is applied widely, cost is low, the brass solid cage can only a kind the corresponding a kind of retainer of model bearing, cost is high.
Therefore the CT machine that proposes of the utility model is with the special-purpose retainer of double-row angular contact bal bearing, the usage requirement of high rotating speed, low noise in the time of can satisfying high speed CT machine and work.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Fig. 2 is the sectional view of Figure 1A-A.
Fig. 3 is the plan view of Fig. 1.
Fig. 4-the 5th, two monolithic retainers of the utility model linkage structure schematic representation.
Fig. 6-the 7th, three monolithic retainers of the utility model linkage structure schematic representation.
Fig. 8 is installed in the structural representation on the bearing for the utility model.
Among the figure: 1, steel ball or ball pocket hole, 2, the monolithic retainer.
Embodiment
In conjunction with accompanying drawing, the embodiment who provides the utility model is following:
Shown in Fig. 1-3: the described CT machine of present embodiment comprises two or two above monolithic retainers 2 with the special-purpose retainer of double-row angular contact bal bearing; Has a plurality of ball pockets hole on each monolithic retainer 2; Ball pocket hole has certain hold depth, can install easily, does not need very big power just can press into pocket hole to steel ball; Can pin steel ball reliably again, not drop, and reduced area of contact, reduce the friction.Because the CT machine has the pocket hole of lock ball with the special-purpose retainer of double-row angular contact bal bearing, if expect length, the production of use roll die of endless, exist the problem of the demoulding to be difficult to solve, therefore retainer is made as monolithic structure.Each monolithic retainer is welded to connect the retainer that the back forms Len req.Retainer adopts soft and nylon 11, nylon 12 or nylon EM740 material that intensity is high are processed.Methene chain in the nylon 11 molecular chain is longer, and amide groups density is low, has nylon 66 and polyolefinic character concurrently, is a kind of engineering plastics of high comprehensive performance.The good mechanical performance of nylon 11 has high impulse strength, good stress cracking resistance and dynamic fatigue property, under very low temperature, still can keep its toughness, and flexibility is good, composite bending modulus is low.The chemical stability of nylon 11 is good, and alkali, alcohol, ketone, aromatic hydrocarbon, salt solution, oils are all had good corrosion resistance.Nylon 12 performance classes are like nylon 11, and ductility is good, and dimensionally stable is prone to processing.The shock resistance of nylon 12 is very excellent, excellent low abrasion and low friction performance and self-lubricating property are arranged, so nylon 12 product frictional noises is very low.Nylon EM740 has excellent creep resistant and the superior elasticity under fatigue performance, high impact properties and the low temperature, strong chemical resistance, and anti-oil and all kinds of solvents, intensity is high, and pliability and dynamic mechanical are good.
Each monolithic retainer 2 is welded to connect the back and forms whole.Welding manner commonly used has ultrasonic welding and vibration friction welding.The ultrasonic welding principle: ultrasonic vibration with soldering tip with ultrasonic to weldment because two weldment place acoustic resistances are big, therefore produce localized hyperthermia, make the fusing of weldment interface, under certain pressure, make two weldments reach attractive in appearance, quick, firm welding effect.Vibration friction welding principle: the generation of frictional heat is through two working of plasticss are clamped; And one of them working of plastics of double vibrations, produce localized hyperthermia, make the interface fusing; Stop vibration, the certain hour that keep-ups pressure, two working of plasticss are just welded together securely.Ultrasonic welding has limitation to working of plastics size and profile.Because the CT machine is complex-shaped with the double-row angular contact bal bearing retainer, sectional dimension is little, therefore be not suitable for adopting ultrasonic welding processing.And the vibration friction welding has the advantages that the processing plastic kind is extensive, be suitable for processed complex, irregular contour, therefore is suitable for the processing of CT machine with the double-row angular contact bal bearing retainer.The vibration friction welding divides linear vibration friction welding and track vibration friction welding, and track vibration friction welding is used to process circular pieces, and the linear vibration friction welding is suitable for processing the described CT machine of the utility model and uses the double-row angular contact bal bearing retainer.On linear vibration friction welding lathe, weld, have the advantages that firm welding is reliable, welding precision is high, distortion is little.Two monolithic retainer part welding backs (shown in Fig. 4-5) can be continued and the 3rd monolithic retainer part welding (shown in the 6-7) again.By that analogy, can obtain the special-purpose retainer of double-row angular contact bal bearing of indefinite length in theory, again according to the needed length of different model bearing, therefrom the retainer of intercepting suitable length uses.
The CT machine that is shown in Figure 8 is with the scheme of installation of the special-purpose retainer of double-row angular contact bal bearing on bearing, and the pitch diameter of two row steel balls 1 surpasses 1m, and every row steel ball outnumbers 200; Article two, the CT machine is with the special-purpose retainer of double-row angular contact bal bearing, and nylon material is processed, and every retainer is a continuous integral body, only has a place to break off after the installation, and leaves certain clearance.
Claims (2)
1. a CT machine is with the special-purpose retainer of double-row angular contact bal bearing; Comprise retainer (2) and ball pocket hole (1); It is characterized in that: described retainer comprises two or two above monolithic retainers (2); Have a plurality of ball pockets holes (1) on each monolithic retainer, each monolithic retainer (2) connects the back and forms whole.
2. a kind of CT machine according to claim 1 is characterized in that with the special-purpose retainer of double-row angular contact bal bearing: described monolithic retainer (2) adopts high nylon 11 of intensity or nylon 12 or nylon EM740 material to process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204101785U CN202360592U (en) | 2011-10-25 | 2011-10-25 | Special retaining frame of double row angular contact ball bearing for CT (computed tomography) machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204101785U CN202360592U (en) | 2011-10-25 | 2011-10-25 | Special retaining frame of double row angular contact ball bearing for CT (computed tomography) machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202360592U true CN202360592U (en) | 2012-08-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204101785U Expired - Fee Related CN202360592U (en) | 2011-10-25 | 2011-10-25 | Special retaining frame of double row angular contact ball bearing for CT (computed tomography) machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202360592U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016534A (en) * | 2012-12-24 | 2013-04-03 | 郑广会 | Slewing support nylon retainer and fabrication process thereof |
| CN114055699A (en) * | 2021-09-26 | 2022-02-18 | 山东博源精密机械有限公司 | Split type bearing retainer forming equipment and forming method |
-
2011
- 2011-10-25 CN CN2011204101785U patent/CN202360592U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016534A (en) * | 2012-12-24 | 2013-04-03 | 郑广会 | Slewing support nylon retainer and fabrication process thereof |
| CN103016534B (en) * | 2012-12-24 | 2016-04-20 | 郑广会 | A kind of revolving support nylon cages and preparation process thereof |
| CN114055699A (en) * | 2021-09-26 | 2022-02-18 | 山东博源精密机械有限公司 | Split type bearing retainer forming equipment and forming method |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120801 Termination date: 20121025 |