CN111536213B - Adjustable centrifugal speed limiting device - Google Patents
Adjustable centrifugal speed limiting device Download PDFInfo
- Publication number
- CN111536213B CN111536213B CN202010363741.1A CN202010363741A CN111536213B CN 111536213 B CN111536213 B CN 111536213B CN 202010363741 A CN202010363741 A CN 202010363741A CN 111536213 B CN111536213 B CN 111536213B
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- Prior art keywords
- gear
- rotating shaft
- planetary gear
- sliding block
- speed increasing
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
- F16H37/04—Combinations of toothed gearings only
- F16H37/041—Combinations of toothed gearings only for conveying rotary motion with constant gear ratio
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
- B64C1/14—Windows; Doors; Hatch covers or access panels; Surrounding frame structures; Canopies; Windscreens accessories therefor, e.g. pressure sensors, water deflectors, hinges, seals, handles, latches, windscreen wipers
- B64C1/1407—Doors; surrounding frames
- B64C1/1423—Passenger doors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
- B64C1/24—Steps mounted on, and retractable within, fuselages
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
- E05F3/04—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
- E05F3/18—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with counteracting springs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D43/00—Automatic clutches
- F16D43/02—Automatic clutches actuated entirely mechanically
- F16D43/04—Automatic clutches actuated entirely mechanically controlled by angular speed
- F16D43/14—Automatic clutches actuated entirely mechanically controlled by angular speed with centrifugal masses actuating the clutching members directly in a direction which has at least a radial component; with centrifugal masses themselves being the clutching members
- F16D43/18—Automatic clutches actuated entirely mechanically controlled by angular speed with centrifugal masses actuating the clutching members directly in a direction which has at least a radial component; with centrifugal masses themselves being the clutching members with friction clutching members
Abstract
The invention provides an adjustable centrifugal speed limiting device, which comprises: a planetary gear speed increasing mechanism (100), a straight gear speed increasing mechanism (200) and a centrifugal speed limiting mechanism (300); the centrifugal speed limiting mechanism (300) comprises: the device comprises a shell (8), a rotating shaft (9), a sliding block (10) and a centering bolt (11); and a steel ball (13), a spring II (14) and an adjusting screw (15) are arranged in the sliding block (10). The problem that the gate falls freely when the actuator (hydraulic or mechanical) fails is effectively solved, and the gate can be applied to overspeed protection and moment limitation of various outward-turning type gates and other mechanisms.
Description
Technical Field
The invention belongs to the field of mechanical structures, and particularly relates to an adjustable centrifugal speed limiting device.
Background
The boarding door of the existing small passenger plane basically adopts a door-ladder integrated structure, the boarding door is put down by outwards overturning, a hydraulic actuator or a torsion bar spring is usually arranged on the cabin door to realize the opening and closing of the cabin door as the damping force of the cabin door falling by gravity, the phenomenon of overspeed falling of the cabin door is easy to happen when the hydraulic actuator or the torsion bar spring fails, and overspeed protection is realized by arranging speed limiting devices on two sides of a rotating shaft of the cabin door.
At present, most speed limiting devices are realized in a one-way clutch mode, the effect of overspeed braking is achieved through the friction locking effect of a friction plate or a friction body and a rubbed piece, and the traditional centrifugal speed limiting device is required to have higher input rotating speed and has the defects of poor bidirectionality, longer combination time, large starting torque, narrow speed limiting range and nonadjustable speed limiting range.
Disclosure of Invention
The purpose of the invention is as follows: the adjustable centrifugal speed limiting device effectively solves the problem that a boarding door freely falls when an actuator (hydraulic or mechanical) fails, and can be applied to overspeed protection and moment limitation of various outward-turning doors and other mechanisms.
The technical scheme of the invention is as follows:
the invention provides an adjustable centrifugal speed limiting device, which comprises: a planetary gear speed increasing mechanism 100, a straight gear speed increasing mechanism 200 and a centrifugal speed limiting mechanism 300; the centrifugal speed limiting mechanism 300 includes: the device comprises a shell 8, a rotating shaft 9, a sliding block 10 and a centering bolt 11; a steel ball 13, a spring II 14 and an adjusting screw 15 are arranged in the sliding block 10; wherein the content of the first and second substances,
the input end of the planetary gear speed increasing mechanism 100 is connected with a rotating shaft at the handrail of the boarding gate through a spline; the output end of the planetary gear speed increasing mechanism 100 is connected with the input straight gear of the straight gear speed increasing mechanism 200;
an output spur gear of the spur gear speed increasing mechanism 200 is connected with the rotating shaft 9 to drive the rotating shaft 9 to rotate;
a plurality of limiting grooves are symmetrically formed in the rotating shaft 9, a centering bolt 11 is arranged in each limiting groove, a sliding block 10 is sleeved on each centering bolt 11, and when the rotating shaft 9 rotates, the sliding block 10 slides along the direction limited by the centering bolts 11 and the limiting grooves;
each be provided with in the slider 10 the sliding tray of steel ball 13, the bottom of sliding tray is provided with adjusting screw 15, be connected with on the adjusting screw 15 spring II 14, adjusting screw 15 is used for adjusting the pretightning force of spring II 14, the spring II 14 is kept away from the one end of adjusting screw 15 is provided with steel ball 13, be provided with the ball socket on the centering bolt 11, when the gate-on door is in the closed condition, steel ball 13 is in under the effect of spring II 14 ball socket department with centering bolt 11 offsets.
Optionally, a spring i 12 is further arranged in the slider 10; spring I12 cover is established centering bolt 11 is last, spring I12 is used for reseing slider 10.
Optionally, the planetary gear increasing mechanism 100 includes: the device comprises a cylinder body 1 and a three-stage 2K-H planetary gear mechanism 2, wherein the three-stage 2K-H planetary gear mechanism 2 is arranged in the cylinder body 1; wherein, the first and the second end of the pipe are connected with each other,
the planet carrier of the first-stage planetary gear mechanism of the three-stage 2K-H planetary gear mechanism 2 is connected with a rotating shaft at the handrail of the boarding gate through a spline; and a sun gear of the third stage of the three-stage 2K-H planetary gear mechanism 2 is connected with a first-stage straight gear of the straight gear speed increasing mechanism 200 through a spline.
Optionally, the spur gear speed increasing mechanism 200 includes: the gear I3, the gear II 4 and the gear III 5 are sequentially driven;
the gear I3 is connected with the sun gear of the three-level 2K-H planetary gear mechanism 2 through a spline, and the gear III 5 is connected with the rotating shaft 9, so that the rotating shaft 9 is driven to rotate.
Optionally, a bearing is arranged at one end of the rotating shaft 9 connected with the gear III 5, and the bearing is a deep groove ball bearing with a dustproof ring at one end.
Optionally, the adjusting screw 15 is connected with the sliding groove through a fine thread, and the pretightening force of the spring ii 14 is adjusted by rotating the position of the adjusting screw 15 in the sliding groove.
Optionally, 4 limiting grooves are symmetrically arranged on the rotating shaft 9 along the circumferential direction, the limiting grooves are in clearance fit with the sliding block 10, and the sliding block 10 is square, fan-shaped, trapezoidal or cylindrical.
Optionally, the adjustable centrifugal speed limiting device further comprises: an end cover I6, a partition plate 7 and an end cover II 16;
the planetary gear speed increasing mechanism 100 is positioned in a cavity enclosed by the cylinder 1 and the partition plate 7;
the straight gear speed increasing mechanism 200 is positioned in a cavity formed by the end cover I6 and the partition plate 7 in an enclosing manner;
the centrifugal speed limiting mechanism 300 is positioned in a cavity defined by the shell 8, the end cover II 16 and the partition plate 7.
The invention has the beneficial effects that:
the invention provides an adjustable centrifugal speed limiting device, which comprises: a planetary gear speed increasing mechanism 100, a straight gear speed increasing mechanism 200 and a centrifugal speed limiting mechanism 300; the centrifugal speed limiting mechanism 300 includes: the device comprises a shell 8, a rotating shaft 9, a sliding block 10 and a centering bolt 11; a steel ball 13, a spring II 14 and an adjusting screw 15 are arranged in the sliding block 10; the input end of the planetary gear speed increasing mechanism 100 is connected with a rotating shaft at the handrail of the boarding gate through a spline; the output end of the planetary gear speed increasing mechanism 100 is connected with an input straight gear of a straight gear speed increasing mechanism 200; an output spur gear of the spur gear speed increasing mechanism 200 is connected with the rotating shaft 9 to drive the rotating shaft 9 to rotate; a plurality of limiting grooves are symmetrically formed in the rotating shaft 9, a centering bolt 11 is arranged in each limiting groove, a sliding block 10 is sleeved on each centering bolt 11, and when the rotating shaft 9 rotates, the sliding blocks 10 slide along the direction limited by the centering bolts 11 and the limiting grooves; a sliding groove of a steel ball 13 is arranged in each sliding block 10, an adjusting screw 15 is arranged at the bottom of the sliding groove, a spring II 14 is connected onto the adjusting screw 15, the adjusting screw 15 is used for adjusting the pre-tightening force of the spring II 14, a steel ball 13 is arranged at one end, far away from the adjusting screw 15, of the spring II 14, a ball socket is correspondingly arranged on the centering bolt 11, and when the boarding door is in a closed state, the steel ball 13 is abutted to the centering bolt 11 at the ball socket under the action of the spring II 14. The adjustable centrifugal speed limiter is applied to the cabin doors of various military and civil small-sized airplanes, has the characteristics of compact structure, quick automatic separation response, small starting torque, wide rotating speed controllable range and the like, and can effectively solve the overspeed protection problem under the fault of the cabin doors. Therefore, the centrifugal speed limiting device has great economic application value.
Drawings
FIG. 1 is a schematic structural diagram of an adjustable centrifugal governor according to an embodiment of the present invention;
FIG. 2 is a first schematic structural diagram of a centrifugal speed limiting mechanism according to an embodiment of the present invention;
FIG. 3 is a second schematic structural view of a centrifugal speed limiting mechanism according to an embodiment of the present invention;
description of reference numerals:
100-a planetary gear speed increasing mechanism; 200-straight gear speed increasing mechanism;
300-centrifugal speed limiting mechanism; 1, a cylinder body;
2-three-stage 2K-H planetary gear mechanism; 3-gear I;
4-gear ii; 5-gear III;
6-end cover I; 7-a partition board;
8, a shell; 9-a rotating shaft;
10-a slide block; 11-centering bolts;
12-spring I; 13-steel balls;
14-spring II; 15-adjusting screws;
16-end cap II.
Detailed Description
FIG. 1 is a schematic structural diagram of an adjustable centrifugal governor according to an embodiment of the present invention, and as shown in FIG. 1, the adjustable centrifugal governor includes: a planetary gear speed increasing mechanism 100, a straight gear speed increasing mechanism 200 and a centrifugal speed limiting mechanism 300; the centrifugal speed limiting mechanism 300 includes: the device comprises a shell 8, a rotating shaft 9, a sliding block 10 and a centering bolt 11; a steel ball 13, a spring II 14 and an adjusting screw 15 are arranged in the sliding block 10; wherein the content of the first and second substances,
the input end of the planetary gear speed increasing mechanism 100 is connected with a rotating shaft at the handrail of the boarding gate through a spline; the output end of the planetary gear speed increasing mechanism 100 is connected with the input straight gear of the straight gear speed increasing mechanism 200;
an output spur gear of the spur gear speed increasing mechanism 200 is connected with the rotating shaft 9 to drive the rotating shaft 9 to rotate;
a plurality of limiting grooves are symmetrically arranged on the rotating shaft 9, a centering bolt 11 is arranged in each limiting groove, a sliding block 10 is sleeved on each centering bolt 11, and when the rotating shaft 9 rotates, the sliding blocks 10 slide along the direction limited by the centering bolts 11 and the limiting grooves;
each be provided with in the slider 10 the sliding tray of steel ball 13, the bottom of sliding tray is provided with adjusting screw 15, be connected with on the adjusting screw 15 spring II 14, adjusting screw 15 is used for adjusting the pretightning force of spring II 14, the spring II 14 is kept away from the one end of adjusting screw 15 is provided with steel ball 13, be provided with the ball socket on the centering bolt 11, when the gate-on door is in the closed condition, steel ball 13 is in under the effect of spring II 14 ball socket department with centering bolt 11 offsets.
FIG. 2 is a first schematic structural diagram of a centrifugal speed limiting mechanism according to an embodiment of the present invention; fig. 3 is a structural schematic diagram of a second centrifugal speed limiting mechanism provided in the embodiment of the present invention, and as shown in fig. 1 to 3, the adjustable centrifugal speed limiting device further includes: the device comprises a cylinder body 1, a three-stage 2K-H planetary gear mechanism 2, a gear I3, a gear II 4, a gear III 5, an end cover I6, a partition plate 7, a spring I12 and an end cover II 16;
the three-stage 2K-H planetary gear mechanism 2 is positioned in a cavity formed by the cylinder 1 and the partition plate 7 in an enclosing way;
the rotating shaft 9, the sliding block 10, the centering bolt 11, the spring I12, the steel ball 13, the spring II 14 and the adjusting screw 15 are all positioned in a cavity enclosed by the shell 8 and the partition plate 16;
the gear I3, the gear II 4 and the gear III 5 are positioned in a cavity formed by the end cover I6 and the partition plate 7 in an enclosing mode;
the three-stage 2K-H planetary gear mechanism, the gear II 4 and the gear III 5 realize the transmission of torque and rotating speed;
the gear III 5 is connected with the rotating shaft 9 through a spline, torque and rotating speed are continuously transmitted to the rotating shaft 9, a deep groove ball bearing with a dust ring at one end is arranged at the left end of the rotating shaft 9, grease lubricated by a gear in the cavity on the left side and other abrasive dust are prevented from entering the cavity on the right side, and therefore a good dry friction environment is formed in the cavity on the right side;
the periphery of the rotating shaft 9 is provided with a radially extending limiting groove, a sliding block 10 is arranged in the limiting groove, the sliding block 10 is provided with 2 spring grooves, a spring is installed in the spring groove, a centering bolt 11 penetrates through the spring I and the spring groove and is screwed on the periphery of the rotating shaft, the sliding block can slide relative to the spring groove and the bolt, the bolt limits the spring I in the spring groove, one end of the spring I12 is abutted against a nut of the bolt, and the other end of the spring I is abutted against the bottom of the spring groove to provide resilience for the sliding block; the middle section of the centering bolt 11 is provided with a ball socket, the steel ball 13 is abutted against the groove under the action of the spring II 14, the right end of the spring II 14 is limited in the spring groove through the adjusting screw 15, the adjusting screw 15 is provided with fine threads, and the pretightening force of the spring can be adjusted by screwing in and screwing out the adjusting screw.
When the rotating shaft 9 rotates, the sliding block 10 overcomes the radial component force of the steel ball 13 and slides along the spring groove radially under the action of inertial centrifugal force, and when the inertial centrifugal force is greater than the radial component force of the steel ball 13, the sliding block abuts against and rubs against the inner wall surface of the shell to generate resistance moment. When the rotating shaft stops rotating, the sliding block is recovered under the action of the force of the spring I12, and the friction torque is cancelled.
The adjustable centrifugal speed limiting device mainly works according to the following principle: under a normal working state, the centrifugal speed limiting device is connected with a boarding gate rotating shaft through a rectangular spline, the transmitted torque is reduced through the three-stage 2K-H planetary gear mechanism and the two-stage straight gear, and the rotating speed is increased. Because the rotating speed transmitted to the centrifugal speed limiter is not more than the set rotating speed value in the opening process of the cabin door, the friction block in the centrifugal speed limiter does not work at the moment, and the opening and closing of the opening speed limiter do not influence the normal working state of the cabin door. When the hydraulic actuating cylinder or the torsion bar spring fails, the cabin door is in a free falling state under the action of gravity, the rotating speed of the cabin door is increased in the free falling process, the centrifugal speed limiting device increases the transmitted rotating speed according to the designed speed increasing ratio, when the transmitted rotating speed is greater than a set value, the sliding block in the centrifugal speed limiting device overcomes the radial component force of the spring II, the sliding block and the shell are contacted under the action of centrifugal force to generate frictional resistance, and at the moment, the centrifugal speed limiting device plays a role in limiting the falling speed of the cabin door.
The input end of the adjustable centrifugal speed limiting device is provided with a three-level 2K-H planetary gear mechanism, the three-level 2K-H planetary gear mechanism is reversely used as a speed increaser, a planet carrier is used as input to bear large input torque, when the first level of the three-level 2K-H planetary gear mechanism 2 at the rectangular spline of the input end has input of rotating speed, namely the boarding door executes normal opening action, the whole planetary gear mechanism rotates along with the rotating shaft of the boarding door due to the transmission action of the second level and the third level of the three-level 2K-H planetary gear mechanism on the motion, and the input rotating speed is increased; and the input rotating speed is continuously increased through the transmission action of the gear shaft I3, the gear II 4 and the gear III 5, and meanwhile, the rotating shaft 9 and the sliding block 10 are driven to rotate together, and the sliding block 10 is not in contact with the shell 8. When the rotating speed of the input end is increased to a certain value, namely the boarding gate is in failure and falls at an overspeed, and the rotating speed of the rotating shaft 11 is greater than a designed threshold value, the inertial centrifugal force of the sliding block 10 is greater than the radial component force of the steel ball 13, the sliding block 10 moves outwards along the spring groove of the rotating shaft 9, and the sliding block 10 is in contact with the shell 8 to generate frictional resistance, so that the function of limiting the speed by friction is achieved.
Claims (8)
1. An adjustable centrifugal governor, comprising: a planetary gear speed increasing mechanism (100), a straight gear speed increasing mechanism (200) and a centrifugal speed limiting mechanism (300); the centrifugal speed limiting mechanism (300) comprises: the device comprises a shell (8), a rotating shaft (9), a sliding block (10) and a centering bolt (11); a steel ball (13), a spring II (14) and an adjusting screw (15) are arranged in the sliding block (10); wherein the content of the first and second substances,
the input end of the planetary gear speed increasing mechanism (100) is connected with a rotating shaft at the handrail of the boarding gate through a spline; the output end of the planetary gear speed increasing mechanism (100) is connected with an input straight gear of the straight gear speed increasing mechanism (200);
an output straight gear of the straight gear speed increasing mechanism (200) is connected with the rotating shaft (9) to drive the rotating shaft (9) to rotate;
a plurality of limiting grooves are symmetrically formed in the rotating shaft (9), a centering bolt (11) is arranged in each limiting groove, the sliding block (10) is sleeved on each centering bolt (11), and when the rotating shaft (9) rotates, the sliding block (10) slides along the direction defined by the centering bolt (11) and the limiting grooves;
the device comprises sliding blocks (10) and is characterized in that sliding grooves of steel balls (13) are formed in the sliding blocks (10), adjusting screws (15) are arranged at the bottoms of the sliding grooves, springs II (14) are connected to the adjusting screws (15), the adjusting screws (15) are used for adjusting pre-tightening force of the springs II (14), the steel balls (13) are arranged at one ends, away from the adjusting screws (15), of the springs II (14), ball sockets are arranged on the centering bolts (11), and when the boarding door is in a closed state, the steel balls (13) are abutted to the centering bolts (11) at the ball sockets under the action of the springs II (14).
2. The centrifugal speed limiting device according to claim 1, characterized in that a spring I (12) is further arranged in the sliding block (10); spring I (12) cover is established on centering bolt (11), spring I (12) are used for reseing slider (10).
3. The centrifugal speed limiter according to claim 1, wherein the planetary gear speed increasing mechanism (100) comprises: the device comprises a cylinder body (1) and a three-stage 2K-H planetary gear mechanism (2), wherein the three-stage 2K-H planetary gear mechanism (2) is arranged in the cylinder body (1); wherein the content of the first and second substances,
the planet carrier of the first-stage planetary gear mechanism of the three-stage 2K-H planetary gear mechanism (2) is connected with a rotating shaft at the handrail of the boarding gate through a spline; and a third-stage sun gear of the three-stage 2K-H planetary gear mechanism (2) is connected with a first-stage straight gear of the straight gear speed increasing mechanism (200) through a spline.
4. The centrifugal speed limiter according to claim 3, wherein the spur gear speed increasing mechanism (200) comprises: the gear I (3), the gear II (4) and the gear III (5) are sequentially driven;
gear I (3) with the sun gear of tertiary 2K-H planetary gear mechanism (2) passes through splined connection, gear III (5) with pivot (9) are connected, thereby drive pivot (9) rotate.
5. The centrifugal speed limiting device according to claim 4, characterized in that a bearing is arranged at one end of the rotating shaft (9) connected with the gear III (5), and the bearing is a deep groove ball bearing with a dust ring at one end.
6. The centrifugal speed limiting device as recited in claim 1, characterized in that the adjusting screw (15) is connected with the sliding groove through fine threads, and the pretightening force of the spring II (14) is adjusted by rotating the position of the adjusting screw (15) in the sliding groove.
7. The centrifugal speed limiting device according to claim 1, wherein 4 limiting grooves are symmetrically arranged on the rotating shaft (9) along the circumferential direction, the limiting grooves are in clearance fit with the sliding block (10), and the sliding block (10) is square, fan-shaped, trapezoidal or cylindrical.
8. The centrifugal speed limiting device according to claim 3, further comprising: an end cover I (6), a partition plate (7) and an end cover II (16);
the planetary gear speed increasing mechanism (100) is positioned in a cavity formed by the cylinder body (1) and the partition plate (7) in an enclosing manner;
the straight gear speed increasing mechanism (200) is positioned in a cavity formed by the end cover I (6) and the partition plate (7) in an enclosing mode;
the centrifugal speed limiting mechanism (300) is positioned in a cavity enclosed by the shell (8), the end cover II (16) and the partition plate (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010363741.1A CN111536213B (en) | 2020-04-30 | 2020-04-30 | Adjustable centrifugal speed limiting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010363741.1A CN111536213B (en) | 2020-04-30 | 2020-04-30 | Adjustable centrifugal speed limiting device |
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| Publication Number | Publication Date |
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| CN111536213A CN111536213A (en) | 2020-08-14 |
| CN111536213B true CN111536213B (en) | 2023-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010363741.1A Active CN111536213B (en) | 2020-04-30 | 2020-04-30 | Adjustable centrifugal speed limiting device |
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| CN (1) | CN111536213B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114042751A (en) * | 2021-11-16 | 2022-02-15 | 安徽屹翔滤材有限公司 | Numerical control precise four-tandem mill for processing ore screen |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86210990U (en) * | 1986-12-31 | 1988-12-28 | 李天宝 | Planetary mechanical stepless speed-changing device |
| JPH08121548A (en) * | 1994-10-24 | 1996-05-14 | Tochigi Fuji Ind Co Ltd | Two-speed change gear |
-
2020
- 2020-04-30 CN CN202010363741.1A patent/CN111536213B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86210990U (en) * | 1986-12-31 | 1988-12-28 | 李天宝 | Planetary mechanical stepless speed-changing device |
| JPH08121548A (en) * | 1994-10-24 | 1996-05-14 | Tochigi Fuji Ind Co Ltd | Two-speed change gear |
Non-Patent Citations (1)
| Title |
|---|
| 基于变档滑移齿轮原定位机构的改进设计;熊文伟;《现代制造技术与装备》;20110715(第03期);全文 * |
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