CN205663837U - Many grades of derailleurs of contrate gear - Google Patents
Many grades of derailleurs of contrate gear Download PDFInfo
- Publication number
- CN205663837U CN205663837U CN201620586084.6U CN201620586084U CN205663837U CN 205663837 U CN205663837 U CN 205663837U CN 201620586084 U CN201620586084 U CN 201620586084U CN 205663837 U CN205663837 U CN 205663837U
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- China
- Prior art keywords
- gear
- bearing
- shaft
- gear ring
- friction pulley
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- Withdrawn - After Issue
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Abstract
The utility model discloses a contrate gear keeps off the derailleur more, which comprises a base, the plastic width -lock type single -layer sealed packing case comprises a casin, countersunk screw, the input shaft, one keeps off the ring gear, an antifriction bearing, two keep off the ring gear, the input shaft bearing, three keep off the ring gear, box body cover board, fourth speed ring gear, the bearing seat, bearing, input roller gear, the control rod, angular contact bearing, the angular contact bearing seat, the guide rail, the integral key shaft, synchronous master gear, the synchronous gear of following, from the gear shaft bearing, the slider, the gear of shifting, the edging bearing frame, the synchronizing shaft bearing, move movable support, synchronizing shaft, the friction pulley, the guide rail screw, output shaft and output shaft bearing etc. Adopting input shaft and the overall arrangement of output shaft quadrature, utilizing the unequal contrate gear of a plurality of diameters and the same roller gear mode of meshing in turn, synchronous speed governing with the help of the friction pulley realizes shifting of a plurality of velocity ratios, and this derailleur has compact structure, convenient operation, and drive ratio advantage such as big can be used to on manpower and motor -driven machinery or the vehicle.
Description
Technical field
This utility model relates to a kind of many grades of gear-shift mechanisms, particularly to a kind of face gear multi-speed transmission.
Background technology
Face gear, also known as ring gear, is a kind of and straight-tooth or helical gears meshed gears, it is believed that be one
Planting special bevel gear, the small cylinder gear of such travelling gear and the central axis angle of face gear can be vertical or connect
Near vertical, can be to intersect to have offset or dish between two central axis.Face gear is mainly used in helicopter, fish
The industries such as line wheel, clock and watch, and bicycle, it is low in axial assembly precision requirement that face gear transmissions has roller gear, load
Relatively big, the advantage such as stable drive, have to compare and be widely applied space.
Finding data at present visible, face gear transmissions application is all a face gear and a roller gear engagement
Definite proportion transmission, and wide variety of many gear gear-shift mechanisms mainly use multipair concentricity away from roller gear engagement system in turn
Realizing multi-change speed, the gear-shift mechanism utilizing multiple face gear to realize multi-gear transmission has no report.For this, one is proposed many
Gear face gear variator, uses the mode that multiple face gear and a roller gear engage in turn, it is achieved multiple speed ratios
Speed change, the advantages such as this variator has compact conformation, easy to operate, and gear ratio is big, can be used for manpower and flexible mechanical or vehicle
On, development prospect is good.
Utility model content
Technical problem to be solved in the utility model is to provide one and keeps off gear-shift mechanism more, uses multiple face gear
Alternately engagement realizes multi-gear transmission.
The technical solution of the utility model:
A kind of face gear multi-shifting speed variator, including chassis 1, casing 2, sunk screw 3, power shaft 4, gear gear ring 5, the
One rolling bearing 6, two gear gear ring 7, power shaft bearing 8, three gear gear ring 9, box cover 10, four keep off gear ring 11, needle bearing seat
12, needle bearing 13, input roller gear 14, stick 15, angular contact bearing 16, angular contact bearing seat 17, guide rail 18, spline
Axle 19, synchronize master gear 20, synchronize from gear 21, from gear shaft holder 22, slide block 23, power shift gear 24, chamfered edge bearing block 25,
Synchronizing shaft bearing 26, traversing carriage 27, synchronizing shaft 28, friction pulley 29, guide rail screw 30, output shaft 31, output shaft bearing 32, axle
With collar the 33, second rolling bearing 34, output shaft screw 35, base 36, tooth bar 37, steel ball 38, spring 39, holding screw 40,
Lock dog 41 and casing screw 42.
Wherein, power shaft 4 and output shaft 31 orthogonal axe, power shaft 4 is by the power shaft bearing 8 being arranged on casing 2
Rolling bearing 6 support location；Output shaft 31 is supported by the rolling bearing 34 in the output shaft bearing 32 being arranged on casing 2,
By the shaft shoulder thereon and axle collar 33 axial limiting；The butt end of power shaft 4 is cavity spline housing structure, in order to splined shaft
19 coordinate；Splined shaft 19 is supported by needle bearing 13 and angular contact bearing 16, the 3rd needle bearing 13 and angular contact bearing 16 points
Not being contained in needle bearing seat 12 and angular contact bearing seat 17, needle bearing seat 12 and angular contact bearing seat 17 are fixed by screw
On traversing carriage 27；Equipped with four slide blocks 23 bottom traversing carriage 27, the guide rail 18 parallel with two coordinates, due to guide rail
18 are fixed on casing 2 by guide rail screw 30, and the direction of guide rail 18 is parallel with power shaft 4 axis, so that splined shaft 19 axle
To movement；Installing an input roller gear 14 and a synchronization master gear 20 on splined shaft 19, input roller gear 14 is adopted
With straight-tooth or helical teeth, the face gear being engaged with is to be kept off gear ring 9, four by gear gear ring 5, the two gear gear ring 7, three installed with one heart
Gear gear ring 11 and chassis 1 are constituted, and diameter and the facewidth of each gear gear ring arrange in addition to considering rational Speed Ratio Distribution, adjacent two gears
Gear ring spacing distance, more than the facewidth of input roller gear 14, is interfered during to avoid shifting gears；Each gear gear ring is by several countersunk heads
Screw 3 is arranged in the upper plane on chassis 1, and the facewidth and the modulus of each gear gear ring are identical, and all crest top lands and plane of action
Concordant, in order to engage with same input roller gear 14 respectively.Chassis 1 is fixed on output shaft 31 by output shaft screw 35
Together, the high-speed rotation of power shaft 4, by splined shaft 19, input roller gear 14, gear ring and chassis 1, is exported by output shaft 31
Low-speed big rotates.Box cover 10 is fixed by screws in the side of casing 2, plays dust seal effect.
For ease of gearshift, need the linear velocity of gear ring to be engaged with to input linear velocity at roller gear 14 pitch circle close, for
This needs lazy-tongs, is also provided with a synchronizing shaft 28 on traversing carriage 27, synchronizing shaft 28 by chamfered edge bearing block 25 and from
Synchronizing shaft bearing 26 support limit in gear shaft holder 22, synchronization thereon is from gear 21 and the synchronization main tooth splined shaft 19
Wheel 20 engagement, the external part of synchronizing shaft 28 installs the friction pulley 29 of a polyurethane material, the end face of friction pulley 29 and input circle
The endface position of stud wheel 14 is concordant, controls the external diameter of friction pulley 29 and synchronizes the transmission from gear 21 with Tong Bu master gear 20
Ratio, the border line speed making friction pulley 29 is equal with the pitch circle line speed of roller gear 14, and the outer rim of friction pulley 29 is near chassis 1
Lower plane, the lower plane on chassis 1 is machined with annular groove to having on the position of gear ring, and lower plane on chassis 1 is corresponding
Two position, gear ring intervals are protruding planar annulars, have above along the radial texture of radial direction, and three planar annulars are coplanar, its
Height contacts with the outer rim of friction pulley 29, forms certain frictional force, and the outer rim of friction pulley 29 does not contacts with annular groove, in input
When roller gear 14 is at a fully engaged with some face gear gear ring, friction pulley 29 dallies, and when needs are shifted gears, output shaft 31 leads to
The clutch crossing the external world disconnects with load end, and input roller gear 14 shifts to another gear ring from some face gear gear ring,
Friction pulley 29 starts to contact friction with the planar annular of some projection, thus controls the rotating speed of face gear, makes roller gear
14 is close with gear ring linear velocity to be engaged, the non-bearing flank of tooth flank profil limit processing chamfered edge of roller gear 14, in order to roller gear
The tooth body of 14 enters in the teeth groove of gear ring to be engaged smoothly, it is achieved newly engages, thus changes transmission speed ratio.
For the ease of manipulation gearshift, being mounted with tooth bar 37 on traversing carriage 27, the power shift gear 24 being engaged with is contained in
The lower end of stick 15, stick 15 is installed in the circular hole of base 36, is screwed on casing 2 at base 36, the end of at
Being additionally provided with the steel ball 38 of positioning action, spring 39 and holding screw 40 on seat 36, base 36 is provided with the ditch corresponding with lock dog 41
Groove, the position retaining disk bottom surface in the stage casing of stick 15 be provided with locating cone hole and lock dog 41, input roller gear 14 and some
When face gear gear ring is at a fully engaged, steel ball 38 acts on the location of the position retaining disk being pushed down into the stage casing at stick 15 at spring 39
In cone hole, lock dog 41 is also stuck in the respective grooves of base 36, when needing gearshift, first presses the lock key solution on stick 15 top
Except the latch functions of lock dog 41, rotate stick 15 and drive power shift gear 24 to rotate, on band carry-over bar 37 and traversing carriage 27
Friction pulley 29 and roller gear 14 move along the direction of guide rail 18, complete gearshift.
The beneficial effects of the utility model: the open a kind of face gear multi-shifting speed variator of this utility model, use power shaft
With output shaft orthogonal packing, the mode that the face gear utilizing multiple diameter not wait engages in turn with same roller gear, borrow
Helping the synchronous variable-speed of friction pulley, it is achieved the gearshift of multiple speed ratios, this variator has compact conformation, easy to operate, and gear ratio is big
Etc. advantage, can be used on manpower and flexible mechanical or vehicle.
The beneficial effects of the utility model: the open a kind of face gear multi-shifting speed variator of this utility model, use power shaft
With output shaft orthogonal packing, the mode that the face gear utilizing multiple diameter not wait engages in turn with same roller gear, borrow
Helping the synchronous variable-speed of friction pulley, it is achieved the gearshift of multiple speed ratios, this variator has compact conformation, easy to operate, and gear ratio is big
Etc. advantage, can be used on manpower and flexible mechanical or vehicle.
Accompanying drawing explanation
Fig. 1 is the shaft side figure of a kind of face gear multi-shifting speed variator.
Fig. 2 is a kind of face gear multi-shifting speed variator vertical view cutaway drawing.
Fig. 3 is that a kind of face gear multi-shifting speed variator master regards partial sectional view.
Fig. 4 is the back side shaft side figure of a kind of face gear multi-shifting speed variator.
In figure: 1 chassis；2 casings；3 sunk screws；4 power shafts；5 one gear gear rings；6 first rolling bearings；7 two gear gear rings；
8 power shaft bearings；9 three gear gear rings；10 box covers；11 4 gear gear rings；12 needle bearing seats；13 needle bearings；14 input circles
Stud wheel；15 sticks；16 angular contact bearings；17 angular contact bearing seats；18 guide rails；19 splined shafts；20 synchronize master gear；21 is same
Step is from gear；22 from gear shaft holder；23 slide blocks；24 power shift gears；25 chamfered edge bearing blocks；26 synchronizing shaft bearings；27 move
Frame；28 synchronizing shafts；29 friction pulleys；30 guide rail screws；31 output shafts；32 output shaft bearings；33 axle collars；34 second axis of rolling
Hold；35 output shaft screws；36 bases；37 tooth bars；38 steel balls；39 springs；40 holding screws；41 lock dogs；42 casing screws.
Detailed description of the invention
Combination technology scheme and accompanying drawing further illustrate detailed description of the invention of the present utility model.
As it is shown in figure 1, a kind of face gear multi-shifting speed variator, by an input roller gear 14 and four gear ring end faces
Gear engages, and input roller gear 14 is fixed on a splined shaft 19 with Tong Bu master gear 20, and splined shaft 19 leads to power shaft 4
Cross slidably spline to connect, with power shaft 4 synchronous axial system.Power shaft 4 is by two roller bearings in bearing block 8, flower
Key axle 19, by the roller bearings on traversing carriage 27, traversing carriage 27 coordinates with guide rail 18 equipped with slide block, can be along flower
Key axle 19 moves axially, and makes input roller gear 14 can select any one end-tooth in gear gear ring 5 to a four gear gear ring
Circle engagement, it is achieved speed governing.It can be seen in fig. 2 that power shaft 4 and output shaft 31 orthogonal axe, power shaft 4 is by being arranged on casing 2
Power shaft bearing 8 in rolling bearing 6 support location；Output shaft 31 is by the output shaft bearing 32 being arranged on casing 2
Rolling bearing 34 supports, by the shaft shoulder thereon and axle collar 33 axial limiting.The butt end of power shaft 3 is cavity spline noose
Structure, moves with splined shaft 19 and coordinates, and splined shaft 19 is supported by needle bearing 13 and angular contact bearing 16, needle bearing 13 and angular contact
Bearing 16 is attached separately in needle bearing seat 12 and angular contact bearing seat 17, and needle bearing seat 12 and angular contact bearing seat 17 are fixed
On traversing carriage 27, coordinate, at spline equipped with four slide blocks 23, the guide rail 18 parallel with two in traversing carriage 27 upper bottom portion
Installing an input roller gear 14 and a synchronization master gear 20 on axle 19, face gear is by the gear gear ring installed with one heart
5, two gear gear ring 7, three gear gear ring 9, four gear gear rings 11 and chassis 1 are constituted, and each gear gear ring is arranged on by several sunk screws 3
In the upper plane on chassis 1, each gear gear ring crest top land and plane of action are concordant, in order to nibble with same input roller gear 14 respectively
Close.Chassis 1 is fixed together with output shaft 31 by output shaft screw 35, and the high-speed rotation of power shaft 4 is through splined shaft 19, defeated
After entering roller gear 14, certain gear gear ring and chassis 1, output shaft 31 low speed output high pulling torque rotate.Box cover 10 passes through spiral shell
Nail is fixed on the side of casing 2, plays dust seal effect.
As can be seen from Fig. 3, the diameter of each gear gear ring on face gear the most about presses the ratio setting of 1:1.5, respectively
The facewidth of gear gear ring should try one's best width, makes adjacent two gear gear rings be spaced the facewidth being more than roller gear 14 again, it is to avoid during gearshift
Interfere.For gearshift smoothly, process chamfered edge on the non-bearing flank of tooth flank profil limit of roller gear 14, simultaneously need to the line of gear ring to be engaged
Linear velocity at speed and roller gear 14 pitch circle is close, needs lazy-tongs for this, it can be seen in fig. 2 that at traversing carriage 27
On also arrange a synchronizing shaft 28, synchronizing shaft 28 is by chamfered edge bearing block 25 and the synchronizing shaft bearing 26 in gear shaft holder 22
Support limit, synchronization thereon engages with the synchronization master gear 20 splined shaft 19 from gear 21, the external part peace of synchronizing shaft 28
Filling the friction pulley 29 of a polyurethane material, the end face of friction pulley 29 is substantially flush with the endface position of roller gear 14, friction
External diameter and the synchronization of wheel 29 are reasonable in design with the gear ratio of Tong Bu master gear 20 from gear 21, make the outer rim linear speed of friction pulley 29
Spending equal with the pitch circle line speed of roller gear 14, as can be seen from Fig. 4, the position that should have gear ring is by the lower plane on chassis 1
Annular groove, corresponding two positions, gear ring interval of the lower plane on chassis 1 are protruding planar annulars, have above and put along radial direction
Penetrating shape texture, three planar annulars are coplanar, and it contacts with the outer rim of the outer rim of friction pulley 29 highly just, form certain friction
Power, the outer rim of friction pulley 29 does not contacts with annular groove, so nibbles completely with some face gear gear ring at roller gear 14
During conjunction, friction pulley 29 dallies, and when needs are shifted gears, output shaft 31 should be disconnected with load end by extraneous clutch, Cylinder Gear
Wheel 14 shifts to another gear ring from some face gear gear ring, and friction pulley 29 starts from the planar annular contact of some projection
Friction, thus control the rotating speed of face gear, make linear velocity at the pitch circle of roller gear 14 connect with gear ring linear velocity to be engaged
Closely, it is simple to the gear teeth of roller gear 14 enter in the teeth groove of gear ring to be engaged smoothly, it is achieved newly engage, transmission speed ratio is changed.
As can be seen from Fig. 3, being mounted with tooth bar 37 on traversing carriage 27, the power shift gear 24 being engaged with is contained in stick
The lower end of 15, stick 15 is installed in the circular hole of base 36, is screwed on casing 2 at base 36, on base 36
It is additionally provided with the steel ball 38 of positioning action, spring 39 and holding screw 40, has the groove corresponding with lock dog 41, stick 15 stage casing
Position retaining disk bottom surface is provided with locating cone hole and lock dog 41, when roller gear 14 and some face gear gear ring are at a fully engaged,
Steel ball 38 is in spring 39 acts on the locating cone hole of the position retaining disk being pushed down into the stage casing at stick 15, and lock dog 41 is also stuck in base
In the respective grooves of 36, when needing gearshift, the lock key first pressing stick 15 top releases the latch functions of lock dog 41, pulls
Stick 15 drives power shift gear 24 to rotate, thus friction pulley 29 on band carry-over bar 37 and traversing carriage 27, roller gear
14 move along the direction of guide rail 18, it is achieved gearshift.
Claims (1)
1. a face gear multi-shifting speed variator, it is characterised in that this face gear multi-shifting speed variator includes chassis (1), casing
(2), sunk screw (3), power shaft (4), gear gear ring (5), the first rolling bearing (6), two gears gear ring (7), power shaft bearing
(8), three gears gear ring (9), box cover (10), four gears gear ring (11), needle bearing seat (12), needle bearing (13), input circle
Stud wheel (14), stick (15), angular contact bearing (16), angular contact bearing seat (17), guide rail (18), splined shaft (19), with
Step master gear (20), synchronization are from gear (21), from gear shaft holder (22), slide block (23), power shift gear (24), chamfered edge bearing block
(25), synchronizing shaft bearing (26), traversing carriage (27), synchronizing shaft (28), friction pulley (29), guide rail screw (30), output shaft
(31), output shaft bearing (32), axle collar (33), the second rolling bearing (34), output shaft screw (35), base (36), tooth
Bar (37), steel ball (38), spring (39), holding screw (40), lock dog (41) and casing screw (42)；
Wherein, power shaft (4) and output shaft (31) orthogonal axe, power shaft (4) is by the power shaft bearing being arranged on casing (2)
(8) rolling bearing (6) in supports location；Output shaft (31) is by the rolling in the output shaft bearing (32) being arranged on casing (2)
Dynamic bearing (34) supports, by the shaft shoulder thereon and axle collar (33) axial limiting；The butt end of power shaft (4) is cavity spline
Nested structure, in order to coordinate with splined shaft (19)；Splined shaft (19) is supported by needle bearing (13) and angular contact bearing (16), and the 3rd
Needle bearing (13) and angular contact bearing (16) are attached separately in needle bearing seat (12) and angular contact bearing seat (17), needle roller axle
Bearing (12) and angular contact bearing seat (17) are fixed by screws on traversing carriage (27)；Traversing carriage (27) bottom equipped with
Four slide blocks (23), the guide rail (18) parallel with two coordinates, owing to guide rail (18) is fixed on casing by guide rail screw (30)
(2) on, the direction of guide rail (18) is parallel with power shaft (4) axis, so that splined shaft (19) moves axially；In splined shaft (19)
Upper installation one input roller gear (14) and synchronization master gear (20), input roller gear (14) uses straight-tooth or oblique
Tooth, the face gear being engaged with is by gear gear ring (5) installed with one heart, two gears gear ring (7), three gears gear ring (9), four gear teeth
Circle (11) and chassis (1) is constituted, and adjacent two gear gear ring spacing distances are more than the facewidth of input roller gear (14), to avoid gearshift
Time interfere；Each gear gear ring is arranged in the upper plane on chassis (1) by several sunk screws (3), the facewidth of each gear gear ring and
Modulus is identical, and all crest top lands and plane of action are concordant, in order to engage with same input roller gear (14) respectively；The end
Dish (1) is fixed together with output shaft (31) by output shaft screw (35), and the high-speed rotation of power shaft (4) passes through splined shaft
(19), input roller gear (14), gear ring and chassis (1), output shaft (31) output low-speed big rotate, box cover
(10) it is fixed by screws in the side of casing (2), plays dust seal effect；
Being also provided with a synchronizing shaft (28) on traversing carriage (27), synchronizing shaft (28) is by chamfered edge bearing block (25) with from gear
Synchronizing shaft bearing (26) support limit in bearing block (22), synchronization thereon is synchronization with splined shaft (19) from gear (21)
Master gear (20) engages, and the external part of synchronizing shaft (28) installs the friction pulley (29) of a polyurethane material, friction pulley (29)
End face is concordant with the endface position of input roller gear (14), controls the external diameter of friction pulley (29) and synchronizes from gear (21) with same
The gear ratio of step master gear (20), the border line speed making friction pulley (29) is equal with the pitch circle line speed of roller gear (14),
The outer rim of friction pulley (29) lower plane near chassis (1), the lower plane in chassis (1) is machined with having on the position of gear ring
Annular groove, corresponding two positions, gear ring interval of lower plane in chassis (1) are protruding planar annulars, have above along radial direction
Radial texture, three planar annulars are coplanar, and its height contacts with the outer rim of friction pulley (29), forms certain frictional force, friction
The outer rim of wheel (29) does not contacts with annular groove, at a fully engaged with some face gear gear ring in input roller gear (14)
Time, friction pulley (29) dallies, and when needs are shifted gears, output shaft (31) is disconnected with load end by extraneous clutch, input circle
Stud wheel (14) shifts to another gear ring from some face gear gear ring, and friction pulley (29) starts the annular with some projection
Plane contact rubs, thus controls the rotating speed of face gear, makes roller gear (14) close with gear ring linear velocity to be engaged, circle
The non-bearing flank of tooth flank profil limit processing chamfered edge of stud wheel (14), in order to the tooth body of roller gear (14) enters tooth to be engaged smoothly
In the teeth groove of circle, it is achieved newly engage, thus change transmission speed ratio；
Traversing carriage (27) being mounted with, tooth bar (37), the power shift gear being engaged with (24) are contained under stick (15)
End, stick (15) is installed in the circular hole of base (36), is screwed on casing (2) at base (36), at base
(36) being additionally provided with the steel ball (38) of positioning action, spring (39) and holding screw (40) on, base (36) is provided with and lock dog
(41) corresponding groove, the position retaining disk bottom surface in the stage casing of stick (15) is provided with locating cone hole and lock dog (41), at input circle
When stud wheel (14) is at a fully engaged with some face gear gear ring, steel ball (38) is pushed down at stick in spring (39) effect
(15), in the locating cone hole of the position retaining disk in stage casing, lock dog (41) is also stuck in the respective grooves of base (36), when needing gearshift,
The lock key first pressing stick (15) top releases the latch functions of lock dog (41), rotates stick (15) and drives power shift gear
(24) rotating, friction pulley (29) on band carry-over bar (37) and traversing carriage (27) and roller gear (14) are along guide rail (18)
Direction is moved, and completes gearshift.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620586084.6U CN205663837U (en) | 2016-06-16 | 2016-06-16 | Many grades of derailleurs of contrate gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620586084.6U CN205663837U (en) | 2016-06-16 | 2016-06-16 | Many grades of derailleurs of contrate gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205663837U true CN205663837U (en) | 2016-10-26 |
Family
ID=57154394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620586084.6U Withdrawn - After Issue CN205663837U (en) | 2016-06-16 | 2016-06-16 | Many grades of derailleurs of contrate gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205663837U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889431A (en) * | 2016-06-16 | 2016-08-24 | 大连理工大学 | End face gear multi-speed transmission |
| CN112917360A (en) * | 2021-01-22 | 2021-06-08 | 刘意 | Mould polishing platform with clean iron fillings function |
-
2016
- 2016-06-16 CN CN201620586084.6U patent/CN205663837U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889431A (en) * | 2016-06-16 | 2016-08-24 | 大连理工大学 | End face gear multi-speed transmission |
| CN105889431B (en) * | 2016-06-16 | 2018-04-10 | 大连理工大学 | A kind of face gear multi-speed transmission |
| CN112917360A (en) * | 2021-01-22 | 2021-06-08 | 刘意 | Mould polishing platform with clean iron fillings function |
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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 | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161026 Effective date of abandoning: 20180410 |