CN101732025B - Bearing device for medical appliance and medical appliance - Google Patents

Bearing device for medical appliance and medical appliance Download PDF

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Publication number
CN101732025B
CN101732025B CN200810177770.8A CN200810177770A CN101732025B CN 101732025 B CN101732025 B CN 101732025B CN 200810177770 A CN200810177770 A CN 200810177770A CN 101732025 B CN101732025 B CN 101732025B
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CN
China
Prior art keywords
bearing
ball
inner ring
director element
ring
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Expired - Fee Related
Application number
CN200810177770.8A
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Chinese (zh)
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CN101732025A (en
Inventor
约尔格·鲍尔
彼得·梅莱尔
马蒂亚斯·施佩伯
王海鹏
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Fifth Schaeffler Investment Management & CoKg GmbH
Schaeffler Holding China Co Ltd
Schaeffler Trading Shanghai Co Ltd
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Holding China Co Ltd
Schaeffler Trading Shanghai Co Ltd
Schaeffler Technologies AG and Co KG
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Publication date
Application filed by Schaeffler Holding China Co Ltd, Schaeffler Trading Shanghai Co Ltd, Schaeffler Technologies AG and Co KG filed Critical Schaeffler Holding China Co Ltd
Priority to CN200810177770.8A priority Critical patent/CN101732025B/en
Publication of CN101732025A publication Critical patent/CN101732025A/en
Application granted granted Critical
Publication of CN101732025B publication Critical patent/CN101732025B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The invention relates to a bearing device for a medical appliance (1) and a medical appliance. The bearing device comprises a ball bearing (12) which has an outer bearing ring (14) and an inner bearing ring (10), wherein the inner bearing ring (10) bears a blade (6) and is provided with guiding elements (40, 41) which extend into an inner ring opening (35); and the guiding elements (40, 41) are coordinated with a guiding device (21) so as to drive the inner bearing ring (10) to rotate relative to the outer bearing ring (14) when the ball bearing moves along the axial direction (23). In order to endow stronger load-bearing capacity to the bearing device and promote the flexibility and the reliability of the bearing by using a simple manufacturing technique, the guiding elements (40, 41) are designed into bearing needles (30, 31), and partial lengths of the bearing needles are arranged in radial holes (28, 29) of the inner bearing ring (10).

Description

For bearing arrangement and the medical equipment of medical equipment
Technical field
The present invention relates to a kind of bearing arrangement for medical equipment and a kind of medical equipment with bearing arrangement.
Background technology
This class bearing device for example comprises the ball bearing with outer race and bearing inner ring, wherein bearing inner ring carries blade and has director element, director element extend in internal ring opening and with guide device combined effect, to cause bearing inner ring relatively rotating with respect to outer race in the axially-movable situation of ball bearing.This to for example expansion to following degree as the function of endoscopic instruments of the bearing arrangement of applicant's internal use, with make this endoscopic instruments for separating of and remove tissue and construct.
In such endoscopic instruments, be provided with the top with anvil, telescopic hood-shaped cutting element can move on this anvil at axial direction.During movement, the edge of the sharpening of hood-shaped cutting element plays medical blade.This blade is connected with the distolateral of internal ring of ball bearing in one side.The outer shroud of ball bearing is connected with plastic cage according to pressurization casting method, and whole device can be placed on the active position within esophagus to be treated by this plastic cage.
Bearer ring have as director element, through spray or molded, radially extend in bearing inner ring hole bolt or protrusion, itself and corresponding guide device combined effect.Guide device is formed by pilot sleeve, and in radially pointing to, bolt or the protrusion of annular distance are fitted in this pilot sleeve.In order to start cutting process, ball bearing and then blade are in axial direction with respect to the motion of the fixing pilot sleeve in position, wherein, except blade propelling in the axial direction, the synergism of the groove by director element and sleeve (guide device) also causes the relatively rotate rotation of bearing inner ring with respect to outer race.This makes for example about 60 ° of blade rotations.
Open for the described bearing arrangement of literary composition for this, the manufacture of director element is proved to be relative complex.In addition, thus director element can not all guarantee in each case best supporting motility and can not under every kind of use of apparatus and ruuning situation, guarantee functional completely reliably.And this exactly has very special significance for medical equipment.
Summary of the invention
Under this background, task of the present invention is, utilizes the simple measure of manufacturing technology to give fundamentally stronger load-bearing capacity and improve the motility and the reliability that support simultaneously at the bearing arrangement described in description introduction to picture.
A kind of following bearing arrangement for medical equipment is correspondingly set, this bearing arrangement comprises the ball bearing with outer race and bearing inner ring, wherein, bearing inner ring supports blade and has the director element extending in internal ring opening, director element and guide device combined effect, to cause bearing inner ring relatively rotating with respect to outer race under ball bearing motion conditions in axial direction, wherein, director element forms as bearing pin, and bearing pin is placed in the radial hole of bearing inner ring with the part of their length.
Preferred formation scheme of the present invention provides in the following description, and their feature can apply separately, also can apply in the mode of combination in any each other.
First advantage of the present invention is, has obviously obtained simply director element at manufacture view.Substantially can use commercial common ball bearing at this, for these a few commercial common ball bearings, bearing inner ring is provided with the radial hole for settling bearing pin.Can use commercial common bearing pin as director element, this has following advantage, and director element can be made in the situation of needle bearing-produce with very high number of packages in the mill with high number of packages-.Thereby high-precision director element is provided, its manufacture and dimensional stability in process technology across major step and can being controlled safely, and because high production number of packages causes only considerably less manufacturing expense.
Another advantage of the present invention is, due to bearing pin be standard can with, can intensively form a team in groups or sort out the cause of obtaining, according to the bearing arrangement of invention can be personalized coordinate the needs of its application and synergistic guide device.Because the available types of bearing pin is various, thus with the coefficient desired guiding clearance of guide device aspect exist and well coordinate probability.
Based on the columniform structure of bearing pin, bearing pin is better than other embodiment of director element (for example, in the shape of driving similar prism set in the described known bearing arrangement of literary composition), and is not easy to and/or blocks.Thereby ensure the motility especially reliably of supporting and then ensured the ruggedness supporting.
Be set to according to a preferable configuration mode of the present invention, that is, guide device has pilot sleeve, and pilot sleeve has the axial groove of coiled coil in its shell, and bearing pin is embedded in this axial groove with its free terminal separately.
If be only provided with two bearing pins along the opposed layout of diameter according to a kind of preferred variant of the present invention, according to the scheme of invention, can preferably realize highly stable guidance feature so.
Can realize by following content according to a kind of advantageous modification of the present invention in the further obvious improvement aspect supporting motility and its life-span, that is, ball bearing is that full ball journal is to oblique ball bearing.Full ball bearing can be understood as a kind of ball bearing, has specially abandoned thus retainer and described ball bearing and arrange based on geometry according to ball roller track the ball of most probable number in this ball bearing situation.By using oblique ball bearing can optimize the mechanical load in cutting process, because can being absorbed in the axial force of this appearance, this ball bearing can not transship.
In addition the invention still further relates to a kind of medical equipment, especially esophagus cutting device, utilizes it can excise less desirable or pernicious organization department (for example tumor) and remove from health opening or body pipe.
According to invention, this medical equipment is configured with the bearing arrangement building according to invention.
Brief description of the drawings
Other preferred embodiment of the present invention and possible formation scheme and supplementary description also below by accompanying drawing to providing in the description of invention preferred embodiment.Wherein:
Fig. 1 schematically shows according to the longitudinal cross-section of the medical equipment of invention;
Fig. 2 shows according to a part for the bearing arrangement of invention with top view with along the sectional view of section line II-II; And
Fig. 3 shows the alternate embodiment corresponding to Fig. 2.
Detailed description of the invention
Fig. 1 illustrates a kind of medical equipment 1 of esophagus cutting device form, and it is guided and entered into patient's esophagus 2 and locate like this by mouth as schematically illustrated, makes between tumor to be removed top 4 and essence cutting equipment 5 in this apparatus.Cutting equipment 5 comprises annular blade 6, and blade 6 is formed by the end 7 of the corresponding sharpening of hood-shaped cutting element 8.
Thereby cutting element 8 is connected and can carries out relative rotation motion of driving system with respect to outer race 14 with the internal ring 10 of the axially oblique ball bearing 12 only schematically showing in Fig. 1 in one side.Outer shroud 14 is sealed with plastics connecting portion 15 and is connected by extruding.Centered by longitudinal axis 16, be furnished with pilot sleeve 18, in its cover barrel shell face 19, add two gathering sills (being merely able to see a gathering sill 20 in Fig. 1) that coil around cover barrel shell spirally.Coefficient with gathering sill 20 is bearing inner ring 10 director elements that also can be described in detail below, thereby sleeve 18 forms guiding and the sports equipment 21 of bearing inner ring 10.
Apparatus 1 is worked according to following function principle: in position shown in Fig. 1, in axial direction 23 propulsive force is applied on cutting element 8 by the breather (Bedienz ü ge) 22 not being shown specifically in detail, distribute in connecting portion 15 or in (unshowned) operation flexible pipe linking thereon.Thereby cutting element 8 moves towards the direction of the anvil 24 being formed by top 4, so that blade 6 separates tumor 3.But for this cutting movement, be not keep pure axial motion, but due to the coefficient cause of gathering sill 20, blade 6 is also loaded the relative rotation motion of driving system with respect to outer race 14 or connecting portion 15.
In addition as shown in Figure 2, axially tiltedly the bearing inner ring 10 of ball bearing 12 is provided with two holes 28,29 opposed along diameter, radial alignment distributes, bearing pin 30,31 respectively with they one section of length or a part be arranged to separately in hole 28,29.
Bearing pin extend to free segment or free terminal 36,37 and formation and the guide device 18(Fig. 1 opposed along diameter each other in internal ring opening or annular distance 35) the coefficient director element 40,41 of groove 20.In the axial relative motion situation of ball bearing 12, relative rotation motion of driving system that described, that follow the coiling of groove 20 before therefore bearing inner ring 10 carries out with respect to outer race 14.The receiving of the radial force that may occur in cutting process and especially axial force by have bearing ball 44,45 inclination install rolling surface (as can from Fig. 2 is fine see) full ball bearing and realize.
Fig. 3 shows oblique ball bearing, and tiltedly ball bearing is substantially corresponding with ball bearing shown in Fig. 2 on its 26S Proteasome Structure and Function, but is distinguishing to some extent aspect the size of external dimensions and director element and configuration.Use other bearing pin 50,51 here, they have larger pin diameter and they are projected in the opening 55 of bearing inner ring 56 a little deeper with its free terminal 53,54.Be not difficult to find out thus, utilizing can be in the case of using standard component cheap and that make accurately-be individual demand and/or the parameter coordinating like a cork bearing pin 50,51-in medical equipment bearing according to the bearing arrangement of invention.
Reference numeral
1 medical equipment
2 esophaguses
3 tumors
4 tops
5 cutting equipments
6 blades
7 ends
8 cutting elements
10 bearing inner rings
12 axially oblique ball bearings
14 outer races
15 plastics connecting portions
16 longitudinal axis
18 pilot sleeves
19 cover barrel shell faces
20 gathering sills
21 guide devices
22 breathers
23 axial directions
24 anvils
28,29 holes
30,31 bearing pins
35 internal ring openings
36,37 bearing pin sections
40,41 director elements
44,45 bearing balls
50,51 bearing pins
53,54 free terminals
55 openings
56 bearing inner rings

Claims (5)

1. for the bearing arrangement of medical equipment (1),
This bearing arrangement comprises the ball bearing (12) of have outer race (14) and bearing inner ring (10),
Wherein, bearing inner ring (10) carrying blade (6) also has the director element (40 extending in internal ring opening (35), 41), described director element (40,41) with guide device (21) combined effect, to in axial direction cause described bearing inner ring (10) relatively rotating with respect to described outer race (14) under (23) motion conditions at ball bearing
Wherein, described director element (40,41) is made up of bearing pin (30,31), and a part for the length of described bearing pin is arranged in the radial hole (28,29) of described bearing inner ring (10).
2. by bearing arrangement claimed in claim 1, it is characterized in that,
Guide device (21) is pilot sleeve (18), described pilot sleeve (18) has the axial groove (20) of coiled coil in its cover barrel shell face (19), described bearing pin (30,31) the free terminal (36,37) extending in described internal ring opening (35) embeds in described axial groove (20).
3. by the bearing arrangement described in claim 1 or 2, it is characterized in that,
Two bearing pins (30,31) along the opposed layout of bearing diameter are only set.
4. by bearing arrangement claimed in claim 1, it is characterized in that,
Described ball bearing (12) is that full ball journal is to oblique ball bearing.
5. medical equipment (1), is characterized in that having the bearing arrangement described in any one in aforementioned claim.
CN200810177770.8A 2008-11-20 2008-11-20 Bearing device for medical appliance and medical appliance Expired - Fee Related CN101732025B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200810177770.8A CN101732025B (en) 2008-11-20 2008-11-20 Bearing device for medical appliance and medical appliance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN200810177770.8A CN101732025B (en) 2008-11-20 2008-11-20 Bearing device for medical appliance and medical appliance

Publications (2)

Publication Number Publication Date
CN101732025A CN101732025A (en) 2010-06-16
CN101732025B true CN101732025B (en) 2014-06-18

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CN200810177770.8A Expired - Fee Related CN101732025B (en) 2008-11-20 2008-11-20 Bearing device for medical appliance and medical appliance

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013213232B4 (en) 2013-07-05 2022-07-07 Olympus Winter & Ibe Gmbh Side view endoscope
CN107212953A (en) * 2017-05-04 2017-09-29 郑州大学第附属医院 A kind of biliary tract radiation treatment stent

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4842579A (en) * 1984-05-14 1989-06-27 Surgical Systems & Instruments, Inc. Atherectomy device
DE102007022316A1 (en) * 2007-05-12 2008-11-13 Schaeffler Kg Radial needle bearing assembly

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7614793B2 (en) * 2002-11-27 2009-11-10 The Anspach Effort, Inc Needle/roller bearing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4842579A (en) * 1984-05-14 1989-06-27 Surgical Systems & Instruments, Inc. Atherectomy device
US4842579B1 (en) * 1984-05-14 1995-10-31 Surgical Systems & Instr Inc Atherectomy device
DE102007022316A1 (en) * 2007-05-12 2008-11-13 Schaeffler Kg Radial needle bearing assembly

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Address after: German Herzogenaurach

Patentee after: SCHAEFFLER TECHNOLOGIES GmbH & Co.KG

Patentee after: SCHAEFFLER HOLDING(CHINA) Co.,Ltd.

Patentee after: SCHAEFFLER TRADING SHANGHAI Co.,Ltd.

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