CN110961667A - Single-drive three-linkage chuck for controlling clamping force of annular component - Google Patents
Single-drive three-linkage chuck for controlling clamping force of annular component Download PDFInfo
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- CN110961667A CN110961667A CN201911358920.XA CN201911358920A CN110961667A CN 110961667 A CN110961667 A CN 110961667A CN 201911358920 A CN201911358920 A CN 201911358920A CN 110961667 A CN110961667 A CN 110961667A
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- handed screw
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- output shaft
- gear
- rectangular groove
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
- B23B31/16045—Jaws movement actuated by screws and nuts or oblique racks
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Abstract
The invention relates to a single-drive three-linkage chuck for controlling the clamping force of an annular component, which is used for synchronously clamping thin-wall annular components with different diameters in a three-point linkage manner. Meanwhile, the chuck adopts a servo motor driving and multi-gear transmission mode to realize synchronous clamping action of the three clamping jaws.
Description
Technical Field
The invention belongs to the technical field of machining, and particularly relates to a single-drive three-linkage chuck with controllable clamping force for an annular component, which is particularly suitable for a thin-wall annular component.
Background
The rotary component is widely applied to the fields of aviation, aerospace and the like, and is clamped by a three-jaw chuck. The thin-wall annular component belongs to a typical rotary component and is mainly characterized in that the thin wall is easy to deform, and when a traditional three-jaw chuck is used for clamping, the clamping force is uncontrollable, so that the component is easy to deform when the clamping force is too large, and the clamping effect of the component can be influenced when the clamping force is small. In order to prevent the deformation of the thin-wall annular component caused by overlarge clamping force in the clamping process, a mode of manufacturing a special tool for inner ring support is adopted at present, and different forms of support tools are designed and manufactured for the thin-wall annular components with different diameters and sizes to be adapted, so that extra manpower and material resources are consumed. In addition, the clamping force is not in a quantitative standard, and accurate clamping is difficult to realize for thin-wall annular components with high clamping force precision requirements.
Disclosure of Invention
The technical problem solved by the invention is as follows: the defects of the prior art are overcome, the single-drive three-linkage chuck for the controllable clamping force of the annular component is provided, the clamping force is measured in real time and fed back in the clamping process of the thin-wall annular component, the correct clamping force is kept by controlling the driving motor, and the adverse effect caused by the overlarge clamping force or the small clamping force is avoided.
The technical solution of the invention is as follows: a single-drive three-linkage chuck with controllable clamping force for an annular component comprises a chuck base, a driving motor, a left-handed screw, a first right-handed screw, a second right-handed screw, a gear transmission mechanism, a first clamping jaw, a second clamping jaw and a third clamping jaw;
the chuck base is provided with a central groove and three rectangular grooves with the same structure, the three rectangular grooves are marked as a first rectangular groove, a second rectangular groove and a third rectangular groove, one end of each rectangular groove is communicated with the central groove, the other end of each rectangular groove is divergent, and every two adjacent rectangular grooves are distributed at an included angle of 120 degrees;
the gear transmission mechanism is positioned in the central groove and comprises an input shaft, a first output shaft and a second output shaft, and the input shaft drives the first output shaft and the second output shaft to synchronously rotate;
the left-handed screw is arranged in a first rectangular groove of the chuck base, one end of the left-handed screw is connected with the driving motor, and the other end of the left-handed screw is connected with an input shaft of the gear transmission mechanism; the first right-handed screw is arranged in a second rectangular groove of the chuck base, one end of the first right-handed screw forms a revolute pair with a positioning block with a hole in the second rectangular groove through a bearing, and the other end of the first right-handed screw is connected with a first output shaft of the gear transmission mechanism; the second right-handed screw is arranged in a third rectangular groove of the chuck base, one end of the second right-handed screw forms a revolute pair with a positioning block with a hole in the third rectangular groove through a bearing, and the other end of the second right-handed screw is connected with a second output shaft of the gear transmission mechanism;
the first clamping jaw is embedded in a first rectangular groove of the chuck base and forms a screw rod structure with the left-handed screw; the second clamping jaw is embedded in a second rectangular groove of the chuck base and forms a screw rod structure with the first right-handed screw; the third clamping jaw is embedded in a third rectangular groove of the chuck base and forms a screw rod structure with the second right-handed screw rod;
the driving motor directly drives the left-handed screw to rotate, the first right-handed screw and the second right-handed screw are driven to rotate through the gear transmission mechanism, and the left-handed screw, the first right-handed screw and the second right-handed screw respectively drive the first clamping jaw, the second clamping jaw and the third clamping jaw to move synchronously and in the same direction so as to clamp the annular member;
all be equipped with force sensor on first jack catch, second jack catch, the third jack catch, in the clamping motion process, when first jack catch, second jack catch, third jack catch contact with annular member, force sensor on first jack catch, second jack catch, the third jack catch is used for the size of real-time detection clamping-force to feed back numerical value to driving motor, the motion adjustment clamping-force through driving motor is in reasonable interval, avoid the too big time of clamping-force or the little adverse effect that causes of clamping-force.
The gear transmission mechanism comprises an input shaft, a first output shaft, a second output shaft, a large driving gear, a small driving gear, a large driven gear and a small driven gear;
the large driving gear and the small driving gear are coaxially arranged on the input shaft, the small driven gear is arranged on the first output shaft, and the large driven gear is arranged on the second output shaft;
the axes of the input shaft, the first output shaft and the second output shaft are uniformly arranged in an angle. The large driving gear, the small driving gear, the large driven gear and the small driven gear are all bevel gears with angles; wherein, big drive gear is the same with big driven gear tooth number, modulus, and the drive ratio is: (ii) a The number of teeth and the modulus of the small driving gear and the small driven gear are the same, and the transmission ratio is as follows: (ii) a
The input shaft rotates to drive the large driving gear and the small driving gear to rotate, and simultaneously drives the large driven gear and the small driven gear to rotate respectively, and finally drives the first output shaft and the second output shaft to synchronously rotate.
The first clamping jaw, the second clamping jaw and the third clamping jaw have the same structure and comprise T-shaped sliding blocks and force sensors;
wherein: t type slider and first force sensor, T type slider are inlayed in the corresponding rectangular channel of chuck base, are equipped with the screw hole on the T type slider, and the levogyration screw rod passes the screw hole, carries out linear motion through screw hole drive T type slider in the rectangular channel, force sensor and the component contact position of treating the clamping for monitor clamping-force's size.
The T-shaped sliding block is in close contact with the corresponding rectangular groove of the chuck base to form a sliding pair.
The chuck base and the T-shaped sliding blocks of the three clamping jaws are made of polytetrafluoroethylene materials.
The friction coefficient of the chuck base (1) and the surfaces of the T-shaped sliding blocks of the three clamping jaws is 0.02-0.04.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention has the force feedback function, can measure and feed back the clamping force in real time in the process of clamping the thin-wall annular component, and can keep the correct clamping force by controlling the driving motor, thereby avoiding the adverse effect caused by overlarge clamping force or small clamping force.
(2) The invention uses the motor as a driving source and realizes the synchronous and equidirectional clamping action of the three clamping jaws through the ingenious gear transmission design.
Drawings
FIG. 1 is a structural diagram of a main body of a single-drive three-linkage chuck for controlling the clamping force of a thin-wall annular component, which is disclosed by the invention;
FIG. 2 is a gear drive mechanism diagram of the present invention;
FIG. 3 is a view of the jaw configuration of the present invention;
FIG. 4 is a cross-sectional view of the jaw and chuck base assembly of the present invention;
FIG. 5 is a schematic view of the thin-walled annular member of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
Fig. 1 shows a structure diagram of a main body of a single-drive three-linkage chuck for controlling the clamping force of a thin-wall annular component. The single-drive triple-linkage chuck comprises a chuck base 1, a driving motor 2, a left-handed screw 3, a first right-handed screw 4, a second right-handed screw 5, a gear transmission mechanism 10, a first jaw 11, a second jaw 12, a third jaw 13, a first coupler 6, a second coupler 7, a third coupler 8, a fourth coupler 9, dustproof folding cloth 14 and a gear box cover plate 15.
The chuck base 1 is provided with a central groove and three rectangular grooves with the same structure, the three rectangular grooves are marked as a first rectangular groove, a second rectangular groove and a third rectangular groove, one end of each rectangular groove is communicated with the central groove, the other end of each rectangular groove is divergent, and every two adjacent rectangular grooves are distributed at an included angle of 120 degrees;
the gear transmission mechanism 10 is positioned in the central groove and comprises an input shaft 101, a first output shaft 102 and a second output shaft 103, and the input shaft 101 drives the first output shaft 102 and the second output shaft 103 to synchronously rotate;
the left-handed screw 3 is arranged in a first rectangular groove of the chuck base 1, one end of the left-handed screw is connected with the driving motor 2 through a first transmission coupler 6, and the other end of the left-handed screw is connected with an input shaft 101 of the gear transmission mechanism 10 through a second coupler 7; the first right-handed screw 4 is arranged in a second rectangular groove of the chuck base 1, one end of the first right-handed screw forms a revolute pair with a positioning block with a hole in the second rectangular groove through a bearing, and the other end of the first right-handed screw is connected with a first output shaft 102 of the gear transmission mechanism 10 through a third coupler 8; the second right-handed screw 5 is arranged in a third rectangular groove of the chuck base 1, one end of the second right-handed screw forms a revolute pair with a positioning block with a hole in the third rectangular groove through a bearing, and the other end of the second right-handed screw is connected with a second output shaft 103 of the gear transmission mechanism 10 through a fourth coupler 9;
the first clamping jaw 11 is embedded in a first rectangular groove of the chuck base 1 and forms a screw rod structure with the left-handed screw rod 3; the second clamping jaw is embedded in a second rectangular groove of the chuck base 1 and forms a screw rod structure with the first right-handed screw rod 4; the third jaw is embedded in a third rectangular groove of the chuck base 1 and forms a screw rod structure with the second right-handed screw rod 5;
the left-handed screw 3 is directly driven to rotate by the driving motor 3, the first right-handed screw 4 and the second right-handed screw 5 are driven to rotate by the gear transmission mechanism 10, and the left-handed screw 3, the first right-handed screw 4 and the second right-handed screw 5 respectively drive the first clamping jaw 11, the second clamping jaw 12 and the third clamping jaw 13 to move synchronously and in the same direction so as to clamp an annular component;
all be equipped with force sensor on first jack catch 11, second jack catch 12, the third jack catch 13, in the clamping motion process, when first jack catch 11, second jack catch 12, the contact of third jack catch 13 and annular member 16, force sensor on first jack catch 11, second jack catch 12, the third jack catch 13 is used for the size of real-time detection clamping-force, and feed back numerical value to driving motor 2, the motion through driving motor 2 is adjusted the clamping-force and is in reasonable interval, avoid the too big time of clamping-force or the little adverse effect that causes of clamping-force.
Fig. 2 shows a gear mechanism of the present invention. The gear transmission mechanism 10 comprises an input shaft 101, a first output shaft 102, a second output shaft 103, a large driving gear 104, a small driving gear 105, a large driven gear 107 and a small driven gear 106;
a large driving gear 104 and a small driving gear 105 are coaxially arranged on the input shaft 101, a small driven gear 106 is arranged on the first output shaft 102, and a large driven gear 107 is arranged on the second output shaft 103;
the axes of the input shaft 101, the first output shaft 102 and the second output shaft 103 are uniformly arranged at 120 degrees, and the large driving gear 104, the small driving gear 105, the large driven gear 107 and the small driven gear 106 are all bevel gears at 30 degrees; wherein, big drive gear 104 is the same with big driven gear 107 tooth number, modulus, and the drive ratio is 1: 1; the small driving gear 105 and the small driven gear 106 have the same tooth number and module, and the transmission ratio is 1: 1;
the input shaft 101 rotates to drive the large driving gear 104 and the small driving gear 105 to rotate, and simultaneously drives the large driven gear 107 and the small driven gear 106 to rotate respectively, and finally drives the first output shaft 102 and the second output shaft 103 to synchronously rotate.
FIG. 3 shows a view of the jaw structure of the present invention; fig. 4 is a sectional view showing the assembly of the jaws of the chuck base according to the present invention. The method is characterized in that: the first jaw 11 comprises a T-shaped slider 111, a force sensor 112. The T-shaped sliding block 111 is embedded in a corresponding rectangular groove of the chuck base 1, and the left-handed screw 3 drives the T-shaped sliding block 111 to linearly move in the rectangular groove through the threaded hole 113.
The force sensor 112 is used for monitoring the contact position of the T-shaped sliding block 111 and a member to be clamped and is used for monitoring the clamping force.
The second jaw 12 and the third jaw 13 have the same composition and function as the first jaw 11.
The T-shaped sliding block is in close contact with the corresponding rectangular groove of the chuck base 1 to form a sliding pair.
The chuck base 1 and the T-shaped sliding blocks of the three clamping jaws are made of polytetrafluoroethylene materials.
The friction coefficient of the chuck base 1 and the surfaces of the T-shaped sliding blocks of the three clamping jaws is 0.02-0.04. Smooth and high-precision transmission can be ensured.
The first jaw 11 comprises a T-shaped slider 111, a first force sensor 112. The T-shaped sliding block 111 is embedded in a corresponding rectangular groove of the chuck base 1, and the left-handed screw 3 drives the T-shaped sliding block 111 to linearly move in the rectangular groove through the threaded hole 113. The first force sensor 112 is used for monitoring the contact position of the T-shaped slide block 111 and a member to be clamped and is used for monitoring the clamping force.
Fig. 5 is a schematic view showing the clamping of the thin-walled annular member according to the present invention.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Claims (6)
1. A single-drive three-linkage chuck with controllable clamping force for an annular component is characterized by comprising a chuck base (1), a driving motor (2), a left-handed screw (3), a first right-handed screw (4), a second right-handed screw (5), a gear transmission mechanism (10), a first clamping jaw (11), a second clamping jaw (12) and a third clamping jaw (13);
a central groove and three rectangular grooves with the same structure are arranged on the chuck base (1), the three rectangular grooves are marked as a first rectangular groove, a second rectangular groove and a third rectangular groove, one end of each rectangular groove is communicated with the central groove, the other end of each rectangular groove is divergent, and every two adjacent rectangular grooves are distributed at an included angle of 120 degrees;
the gear transmission mechanism (10) is positioned in the central groove and comprises an input shaft (101), a first output shaft (102) and a second output shaft (103), and the input shaft (101) drives the first output shaft (102) and the second output shaft (103) to synchronously rotate;
the left-handed screw (3) is arranged in a first rectangular groove of the chuck base (1), one end of the left-handed screw is connected with the driving motor (2), and the other end of the left-handed screw is connected with an input shaft (101) of the gear transmission mechanism (10); the first right-handed screw (4) is arranged in a second rectangular groove of the chuck base (1), one end of the first right-handed screw forms a revolute pair with a positioning block with a hole in the second rectangular groove through a bearing, and the other end of the first right-handed screw is connected with a first output shaft (102) of the gear transmission mechanism (10); the second right-handed screw (5) is arranged in a third rectangular groove of the chuck base (1), one end of the second right-handed screw forms a revolute pair with a positioning block with a hole in the third rectangular groove through a bearing, and the other end of the second right-handed screw is connected with a second output shaft (103) of the gear transmission mechanism (10);
the first clamping jaw (11) is embedded in a first rectangular groove of the chuck base (1) and forms a screw rod structure with the left-handed screw rod (3); the second clamping jaw is embedded in a second rectangular groove of the chuck base (1) and forms a screw rod structure with the first right-handed screw rod (4); the third jaw is embedded in a third rectangular groove of the chuck base (1) and forms a screw rod structure with the second right-handed screw rod (5);
the left-handed screw (3) is directly driven to rotate by the driving motor (3), the first right-handed screw (4) and the second right-handed screw (5) are driven to rotate by the gear transmission mechanism (10), and the left-handed screw (3), the first right-handed screw (4) and the second right-handed screw (5) respectively drive the first clamping jaw (11), the second clamping jaw (12) and the third clamping jaw (13) to move synchronously and in the same direction so as to clamp an annular member;
all be equipped with force sensor on first jack catch (11), second jack catch (12), third jack catch (13), in the clamping motion process, when first jack catch (11), second jack catch (12), when third jack catch (13) and annular member (16) contact, first jack catch (11), second jack catch (12), force sensor on third jack catch (13) is used for the size of real-time detection clamping-force, and feed back numerical value to driving motor (2), the motion adjustment clamping-force through driving motor (2) is in reasonable interval, avoid the clamping-force when too big or the little adverse effect that causes of clamping-force.
2. A single-drive three-linkage chuck for controlling the clamping force of a ring-shaped member according to claim 1, characterized in that the gear transmission mechanism (10) comprises an input shaft (101), a first output shaft (102), a second output shaft (103), a large driving gear (104), a small driving gear (105), a large driven gear (107), a small driven gear (106);
a large driving gear (104) and a small driving gear (105) are coaxially arranged on the input shaft (101), a small driven gear (106) is arranged on the first output shaft (102), and a large driven gear (107) is arranged on the second output shaft (103);
the axes of the input shaft (101), the first output shaft (102) and the second output shaft (103) are uniformly arranged at 120 degrees. The large driving gear (104), the small driving gear (105), the large driven gear (107) and the small driven gear (106) are all bevel gears with the angle of 30 degrees; wherein, big drive gear (104) and big driven gear (107) number of teeth, modulus are the same, and the drive ratio is 1: 1; the small driving gear (105) and the small driven gear (106) have the same tooth number and module, and the transmission ratio is 1: 1;
the input shaft (101) rotates to drive the large driving gear (104) and the small driving gear (105) to rotate, and simultaneously drives the large driven gear (107) and the small driven gear (106) to rotate respectively, and finally drives the first output shaft (102) and the second output shaft (103) to rotate synchronously.
3. The single-drive three-linkage chuck for controlling the clamping force of the annular member as claimed in claim 1, wherein the first jaw (11), the second jaw and the third jaw are identical in structure and comprise a T-shaped sliding block (111) and a force sensor (112);
wherein: t type slider (111) and first force sensor (112), T type slider (111) are inlayed in the corresponding rectangular channel of chuck base (1), are equipped with screw hole (113) on T type slider (111), and left-handed screw rod (3) pass screw hole (113), carry out linear motion through screw hole (113) drive T type slider (111) in the rectangular channel, and force sensor (112) and waiting to clamp the component contact position for the size of monitoring clamping-force.
4. A single-drive three-linkage chuck for controlling the clamping force of annular members according to claim 3, characterized in that the T-shaped slider is in close contact with the corresponding rectangular groove of the chuck base (1) to form a sliding pair.
5. A single-drive three-linkage chuck for controlling the clamping force of a ring-shaped member according to claim 1, characterized in that the chuck base (1) and the T-shaped sliders of the three jaws are made of teflon.
6. The single-drive three-linkage chuck for controlling the clamping force of the annular member as claimed in claim 1, wherein the chuck base (1) and the T-shaped slider surface of the three jaws have a friction coefficient of 0.02-0.04.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911358920.XA CN110961667B (en) | 2019-12-25 | 2019-12-25 | Single-drive three-linkage chuck for controlling clamping force of annular component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911358920.XA CN110961667B (en) | 2019-12-25 | 2019-12-25 | Single-drive three-linkage chuck for controlling clamping force of annular component |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110961667A true CN110961667A (en) | 2020-04-07 |
| CN110961667B CN110961667B (en) | 2021-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911358920.XA Active CN110961667B (en) | 2019-12-25 | 2019-12-25 | Single-drive three-linkage chuck for controlling clamping force of annular component |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112792724A (en) * | 2020-12-31 | 2021-05-14 | 杨才军 | High-precision machining device for inner hole of shaft part |
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| CN109128237A (en) * | 2018-07-31 | 2019-01-04 | 大连理工大学 | A kind of turning thin-wall cylindrical element outer wall mounting and clamping system and method |
| CN110052635A (en) * | 2019-04-28 | 2019-07-26 | 杨晓林 | A kind of self-centering chuck |
| CN110228025A (en) * | 2019-04-30 | 2019-09-13 | 青岛科技大学 | A kind of three-pawl type clamping device for clamping test pieces outer wall |
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| CN203843215U (en) * | 2014-04-26 | 2014-09-24 | 湖南利欧泵业有限公司 | Self-centering chuck for vertical lathe |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112792724A (en) * | 2020-12-31 | 2021-05-14 | 杨才军 | High-precision machining device for inner hole of shaft part |
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| Publication number | Publication date |
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| CN110961667B (en) | 2021-03-26 |
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