CN203784152U - Thin wall brake sleeve for direct drive rotary table - Google Patents
Thin wall brake sleeve for direct drive rotary table Download PDFInfo
- Publication number
- CN203784152U CN203784152U CN201420154159.4U CN201420154159U CN203784152U CN 203784152 U CN203784152 U CN 203784152U CN 201420154159 U CN201420154159 U CN 201420154159U CN 203784152 U CN203784152 U CN 203784152U
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- Prior art keywords
- walled
- thin
- braking sleeve
- directly
- vesica piscis
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Abstract
The utility model relates to a thin wall brake sleeve for a direct drive rotary table. A main body of the thin wall brake sleeve is an annular cylinder which has an elliptical ring-shaped cross section. Along the height of the annular cylinder, an outer gap d is formed between the outer rim of the elliptical ring and the inner wall of a housing, an inner gap c is formed between the inner rim of the elliptical ring and the outer wall of a motor rotor, and the outer gap d is greater than the inner gap c. The outer gap d is a hydraulic oil filling space. When the outer gap d is filled with hydraulic oil to generate radial hydraulic pressure, at least one acting point on the surface of the inner wall of the annular cylinder clings to the outer wall of the motor rotor under the effect of the hydraulic pressure in the circumferential direction of the elliptical ring to generate frictional force. Under a condition that intensity and wear resistance of the thin wall brake sleeve is ensured, the thin wall brake sleeve is more liable to deform elastically, so that brake of a direct drive rotary table is easier, safer and more reliable, and oil leakage is also prevented.
Description
Technical field
The utility model relates to and directly turns platform technical field, is specifically related to a kind of thin-walled braking sleeve that directly turns platform special use.
Background technique
Directly turn the rotational coordinates that platform is mainly used in numerical control machine tool, the corner that is also widely used in radar, gun turret, gyroscope etc. is controlled automatically.Directly turn platform with its zero transmission, without driving error, without distinguishing features such as the wearing and tearing of driving component, precision height, obtain in recent years the great attention of relevant industries, be listed in continuously national great special project.
Directly turn in platform correlation technique, an important technology is the braking technology of turntable, main mode of braking has the end face braking of employing butterfly spring or hydraulic power and adopts the encircling type that hydraulic pressure is power to brake two classes at present, the former is when braking force is larger, can cause the distortion of turntable table top, affect the precision of turntable, thereby encircling type braking technology becomes the braking technology of main flow.
Conventional thin-walled braking sleeve structure is shown in Fig. 1 (Fig. 1 is outer-rotor structure, and inner rotor core and Fig. 1 are in like manner), and arrow is depicted as the direction of hydraulic coupling F.The groundwork principle of encircling type braking technology is: the thin-walled braking sleeve 1 of circular ring section is close to the external cylindrical surface of rotor assembly; Between the thin-walled braking sleeve 1 of circular ring section and housing, form the oil recess structure of sealing, when passing to pressure oil between oil pocket, make thin-walled braking sleeve 1 produce resiliently deformable, be tightly attached to rotor assembly external cylindrical surface on, the frictional force of usining is between the two as braking force.
Yet, this thin-walled braking sleeve 1 exists a very serious problem in actual braking process, that is: hydraulic coupling F acts on the outer cylinder face of thin-walled braking sleeve 1, under circular ring section, the distortion of wanting thin-walled braking sleeve 1 is produced is radially very difficult, its reason is: the stressed F of outer cylinder face of thin-walled braking sleeve 1 is even, simultaneously, mutual traction between each molecule of material of formation thin-walled braking sleeve 1, make thin-walled braking sleeve 1 cannot produce enough distortion radially, thereby cannot rotor assembly external cylindrical surface on produce enough frictional force as braking force.
The material of thin-walled braking sleeve is substantially all selected to beryllium bronze both at home and abroad, the frictional force between thin-wall sleeve and rotor assembly mainly guarantees by the pressure of hydraulic system.Key is that existing thin-walled braking sleeve sectional shape is circle, under the effect of hydraulic coupling, wants to make a circular cross section radially producing resiliently deformable, is a very difficult thing.In engineering reality, mostly adopting raising hydraulic system pressure and the thickness that reduces thin-wall sleeve to solve is the problem that thin-wall sleeve produces resiliently deformable, the former not only wastes energy, and has brought the problems such as leakage of oil, and the latter can cause thin-wall sleeve soon because wearing and tearing make braking failure.
Model utility content
The technical problems to be solved in the utility model is, a kind of platform thin-walled braking sleeve that directly turns is provided, is guaranteeing, under the prerequisite of thin-walled braking sleeve intensity and wear resistance, to make thin-walled braking sleeve more easily produce resiliently deformable, thereby the braking that makes directly to turn platform is more prone to, safe and reliable, avoid leakage of oil.
The utility model is that to address the above problem adopted technological scheme as follows:
Directly turn a platform thin-walled braking sleeve, be arranged between the rotor and housing that directly turns platform; It is characterized in that: directly turning platform thin-walled braking sleeve main body is annular canister, the equal subtend in the upper-end surface of annular canister and lower end surface is stretched out and is formed the overhanging edge coordinating with housing shoulder, and the overhanging edge at upper-end surface and place, lower end surface is all fixed on housing; The cross section of described annular canister is vesica piscis, along the short transverse of annular canister, external series gap d is all set between vesica piscis outer rim and inner walls, between vesica piscis inner edge and rotor outer wall, internal clearance c is all set; External series gap d is greater than internal clearance c, and external series gap d is that hydraulic oil is full of space; When being full of hydraulic oil producing radial hydraulic pressure in external series gap d, along vesica piscis circumferential direction, on the internal face of annular canister, at least one point of action is close to rotor outer wall and is produced frictional force under action of hydraulic force.
In technique scheme, along vesica piscis circumferential direction, be positioned on the internal face of the corresponding annular canister cambered surface of vesica piscis major axis a and at least at point of action of short-axis direction and rotor outer wall, be close to and produce frictional force.
In technique scheme, along vesica piscis circumferential direction, be positioned on the internal face of the corresponding annular canister cambered surface of vesica piscis major axis a and at least at two point of action of short-axis direction and rotor outer wall, be close to and produce frictional force.
In technique scheme, the Length Ratio of vesica piscis major axis a and minor axis b is between 1-1.015.
In technique scheme, on vesica piscis, be disposed radially serpentine bend section or wave bending section.
In technique scheme, directly turn platform thin-walled braking sleeve by Young's modulus and Poisson's ratio be more suitable for distortion high-abrasive material make.In technique scheme, described directly to turn platform thin-walled braking sleeve one-body molded.
Adopt an above-mentioned braking method that directly turns platform thin-walled braking sleeve, it is characterized in that comprising the steps:
1), after directly turning platform braking instruction and sending, toward directly turning in the vesica piscis outer rim of platform thin-walled braking sleeve and the external series gap d of inner walls, be full of hydraulic oil;
2) hydraulic oil produces along with volume increase and to directly turning the annular canister outer wall of platform thin-walled braking sleeve the radial hydraulic pressure F progressively increasing in gap d outside; Along with radial hydraulic pressure, F constantly increases, and along vesica piscis circumferential direction, directly turns at least one point of action on platform thin-walled braking sleeve internal face and under action of hydraulic force, is close to rotor outer wall and produces frictional force;
3) when frictional force makes directly to turn platform thin-walled braking sleeve internal face, be close to rotor outer wall, thereby while stoping rotor to be rotated further, braking completes, and regains hydraulic oil.
With respect to prior art, the beneficial effects of the utility model are:
The utility model is on the basis of a large amount of engineering practices, change the sectional shape of thin-walled braking sleeve, change circular cross-section into appropriate elliptic cross-section, sectional shape changes length state into than being the elliptical shape of suitable numerical value by circle, has thoroughly changed the stressed character in cross section, under the effect of hydraulic coupling, elliptic cross-section is easy to distortion at short-axis direction, thereby when directly turning the braking of platform, only paying close attention to braking force just enough, need not be again the distortion difficulty problem headache of braking sleeve.
1) analyze by experiment and obtain the bad reason of braking effect and be to produce resiliently deformable, what overcome traditional improvement technology " does " thinking thin simultaneously simply, break through tradition, do not do thin-walled thick, but the sectional shape of change thin-walled braking sleeve, make thin-walled braking sleeve more easily produce resiliently deformable, well solved the difficult problem of Circular Thin cover distortion, significantly improved the reliability that directly turns platform braking; The loss of strength of Circular Thin cover and the problem wearing no resistance have been avoided simultaneously.
2) under the ordering about of creative motivation, inventor has obtained the ratio of semi-minor axis length in suitable elliptical ring cross section by many experiments, makes the technical program forming thus increase percent 50-70% than the amount of deformation of circular cross-section general in prior art; Due to alteration of form, really reached one or two group of very heavy effect, making has enough large frictional force between thin-wall sleeve and rotor assembly, thereby has guaranteed that the braking of turntable is more reliable.
3), on oval-shaped basis, can increase radially serpentine bend section or wave bending section, thereby further increase deformation effect.
4) select Young's modulus and Poisson's ratio to be more suitable for the high-abrasive material of distortion as the material of thin-walled braking sleeve; Further guarantee deformation effect.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail:
Figure 1 shows that thin-walled braking sleeve fundamental diagram of the prior art.
Fig. 2 is according to the mounting structure schematic diagram of embodiment's of the present utility model thin-walled braking sleeve.
Fig. 3 is the local enlarged diagram of the thin-walled braking sleeve installment state of Fig. 2.
Fig. 4 is according to the structural representation of embodiment's of the present utility model thin-walled braking sleeve.
In Fig. 2-4, each reference character is as follows: 2, thin-walled braking sleeve; 3, servo motor rotor assembly; 4, servo motor stator assembly; 5, worktable; 6, turntable bearing; 7, housing; 8, oilhole.
Embodiment
As in Figure 2-4, that according to the utility model, implements directly turns platform thin-walled braking sleeve 2, is arranged between the rotor and shell 7 bodies that directly turns platform; The worktable 5 that directly turns platform is driven by motor by turntable bearing 6; Rotor is servo motor rotor assembly 3, and internal rotor is servo motor stator assembly 4; Thin-walled braking sleeve 2 main bodys are annular canister, and the equal subtend in the upper-end surface of annular canister and lower end surface is stretched out and formed the overhanging edge coordinating with housing 7 shoulders, and the overhanging edge at upper-end surface and place, lower end surface is all fixed on housing 7; The cross section of described annular canister is vesica piscis, along the short transverse of annular canister, external series gap d is all set between vesica piscis outer rim and inner walls, between vesica piscis inner edge and rotor outer wall, internal clearance c is all set; External series gap d is greater than internal clearance c, and external series gap d is that hydraulic oil is full of space; When being full of hydraulic oil producing radial hydraulic pressure in external series gap d, along vesica piscis circumferential direction, on the internal face of annular canister, at least one point of action is close to servo motor rotor assembly 3 outer walls and is produced frictional force under action of hydraulic force.In a preferred embodiment, internal clearance c is 0.1mm, and external series gap d is 10mm.
In technique scheme, along vesica piscis circumferential direction, be positioned at least one point of action and rotor outer wall on the internal face of the corresponding annular canister cambered surface of vesica piscis major axis a and be close to and produce frictional force.
In technique scheme, the Length Ratio of vesica piscis major axis a and minor axis b is between 1-1.018.In optimum embodiment, the Length Ratio of vesica piscis major axis a and minor axis b is 1.015.
In technique scheme, on vesica piscis, be disposed radially serpentine bend section or wave bending section (whether can increase deformation effect, you consider yourself).
In technique scheme, directly turn platform thin-walled braking sleeve by Young's modulus and Poisson's ratio be more suitable for distortion high-abrasive material make.
Through a large amount of tests, the material of the thin-walled braking sleeve of final choice is as follows:
| Material | Density (g/cm3) | Elastic modulus G Pa | Shear modulus G Pa | Poisson's ratio v | Thermal expansion coefficient/℃ | Yield strength MPa |
| Tin bronze QSn4-3 | 8.8 | 93.2 | 39.2 | 0.3 | 18 | 420 |
In technique scheme, described directly to turn platform thin-walled braking sleeve one-body molded.
Adopt the above-mentioned braking method that directly turns platform thin-walled braking sleeve, it is characterized in that comprising the steps:
1), after directly turning platform braking instruction and sending, from oilhole 8, in directly turning the vesica piscis outer rim of platform thin-walled braking sleeve 2 and the external series gap d between housing 7 inwalls, be full of hydraulic oil;
2) hydraulic oil produces along with volume increase and to directly turning the annular canister outer wall of platform thin-walled braking sleeve 2 the radial hydraulic pressure F progressively increasing in gap d outside; Along with radial hydraulic pressure, F constantly increases, and along vesica piscis circumferential direction, directly turns at least one point of action on platform thin-walled braking sleeve internal face and under action of hydraulic force, is close to servo motor rotor assembly 3 outer walls and produces frictional force;
3) when frictional force makes directly to turn platform thin-walled braking sleeve internal face, be close to rotor outer wall, thereby while stoping rotor to be rotated further, braking completes, and regains hydraulic oil.
The beneficial effects of the utility model are analyzed as follows:
1) analyze by experiment and obtain the bad reason of braking effect and be to produce resiliently deformable, what overcome traditional improvement technology " does " thinking thin simultaneously simply, break through tradition, do not do thin-walled thick, but the sectional shape of change thin-walled braking sleeve, make thin-walled braking sleeve more easily produce resiliently deformable, well solved the difficult problem of Circular Thin cover distortion, significantly improved the reliability that directly turns platform braking; The loss of strength of Circular Thin cover and the problem wearing no resistance have been avoided simultaneously.
2) under the ordering about of creative motivation, model utility people has obtained the ratio of semi-minor axis length in suitable elliptical ring cross section by many experiments, make the technical solution of the utility model forming thus increase percent 50-70% than the amount of deformation of circular cross-section general in prior art; Due to alteration of form, really reached one or two group of very heavy effect, making has enough large frictional force between thin-wall sleeve and rotor assembly, thereby has guaranteed that the braking of turntable is more reliable.
3), on oval-shaped basis, can increase radially serpentine bend section or wave bending section, thereby further increase deformation effect.
4) select Young's modulus and Poisson's ratio to be more suitable for the high-abrasive material of distortion as the material of thin-walled braking sleeve; Further guarantee deformation effect.
Claims (7)
1. directly turn a platform thin-walled braking sleeve, be arranged between the rotor and housing that directly turns platform; It is characterized in that: directly turning platform thin-walled braking sleeve main body is annular canister, the equal subtend in the upper-end surface of annular canister and lower end surface is stretched out and is formed the overhanging edge coordinating with housing shoulder, and the overhanging edge at upper-end surface and place, lower end surface is all fixed on housing; The cross section of described annular canister is vesica piscis, along the short transverse of annular canister, external series gap d is all set between vesica piscis outer rim and inner walls, between vesica piscis inner edge and rotor outer wall, internal clearance c is all set; External series gap d is greater than internal clearance c, and external series gap d is that hydraulic oil is full of space; When being full of hydraulic oil producing radial hydraulic pressure in external series gap d, along vesica piscis circumferential direction, on the internal face of annular canister, at least one point of action is close to rotor outer wall and is produced frictional force under action of hydraulic force.
2. the platform thin-walled braking sleeve that directly turns according to claim 1, it is characterized in that: along vesica piscis circumferential direction, be positioned on the internal face of the corresponding annular canister cambered surface of vesica piscis major axis a and at least at point of action of short-axis direction and rotor outer wall, be close to and produce frictional force.
3. the platform thin-walled braking sleeve that directly turns according to claim 1 and 2, it is characterized in that: along vesica piscis circumferential direction, be positioned on the internal face of the corresponding annular canister cambered surface of vesica piscis major axis a and at least at two point of action of short-axis direction and rotor outer wall, be close to and produce frictional force.
4. the platform thin-walled braking sleeve that directly turns according to claim 1 and 2, is characterized in that: the Length Ratio of vesica piscis major axis a and minor axis b is between 1-1.015.
5. the platform thin-walled braking sleeve that directly turns according to claim 3, is characterized in that: on vesica piscis, be disposed radially serpentine bend section or wave bending section.
6. according to directly turning platform thin-walled braking sleeve described in claim 1 or 2 or 5, it is characterized in that: directly turn the high-abrasive material that platform thin-walled braking sleeve is more suitable for distortion by Young's modulus and Poisson's ratio and make.
7. according to directly turning platform thin-walled braking sleeve described in claim 1 or 2 or 5, it is characterized in that: described directly to turn platform thin-walled braking sleeve one-body molded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420154159.4U CN203784152U (en) | 2014-04-01 | 2014-04-01 | Thin wall brake sleeve for direct drive rotary table |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420154159.4U CN203784152U (en) | 2014-04-01 | 2014-04-01 | Thin wall brake sleeve for direct drive rotary table |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203784152U true CN203784152U (en) | 2014-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420154159.4U Withdrawn - After Issue CN203784152U (en) | 2014-04-01 | 2014-04-01 | Thin wall brake sleeve for direct drive rotary table |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203784152U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103883647A (en) * | 2014-04-01 | 2014-06-25 | 武汉轻工大学 | Thin-wall braking sleeve of direct drive rotary table and manufacturing method |
-
2014
- 2014-04-01 CN CN201420154159.4U patent/CN203784152U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103883647A (en) * | 2014-04-01 | 2014-06-25 | 武汉轻工大学 | Thin-wall braking sleeve of direct drive rotary table and manufacturing method |
| CN103883647B (en) * | 2014-04-01 | 2016-02-10 | 武汉轻工大学 | Directly turn platform thin-walled braking sleeve and braking method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140820 Effective date of abandoning: 20160210 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |