CN203528569U - Linkage braking mechanism of wheels - Google Patents
Linkage braking mechanism of wheels Download PDFInfo
- Publication number
- CN203528569U CN203528569U CN201320613149.8U CN201320613149U CN203528569U CN 203528569 U CN203528569 U CN 203528569U CN 201320613149 U CN201320613149 U CN 201320613149U CN 203528569 U CN203528569 U CN 203528569U
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- brake
- wheel
- fixed mount
- trailing cable
- block
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- Expired - Lifetime
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- 230000007246 mechanism Effects 0.000 title claims abstract description 59
- 238000013016 damping Methods 0.000 claims description 17
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model discloses a linkage braking mechanism of wheels. The linkage braking mechanism of the wheels comprises the first wheel and the second wheel, wherein a first braking handle used for braking the first wheel and a second braking handle used for braking the second wheel are made in linkage through a drag cable, and thus the first wheel and the second wheel can be synchronously in the braking state or the braking removing state. The braking mechanism is simple in structure and convenient to use; when the rotation direction of the first wheel and the rotation direction of the second wheel change, the drag cable on the linkage braking mechanism will not be wound, and the linkage braking mechanism can be installed on a vehicle with universal wheels to be used for linkage braking of multiple wheels.
Description
Technical field
the utility model relates to a kind of interlock braking mechanism of wheel.
Background technology
in prior art, brake on vehicle between front and back wheel or between left and right wheels need to be controlled by independent separately braking mechanism, the brake handgrip that need to control each braking mechanism during brake just can make corresponding wheel brake, if needing front and back wheel brakes simultaneously, or need left and right wheels to brake simultaneously, need to control the brake handgrip that each wheel is corresponding simultaneously.Comparatively inconvenience in operation like this, and the brake that easily causes front and back wheel is asynchronous or the brake asynchrony phenomenon of left and right wheels, and in more existing linkage brake mechanisms, be often only applicable on two wheels of directional rotating, can not be for the synchronous brake of cardan wheel.
Summary of the invention
the purpose of this utility model is the shortcoming that overcomes prior art, and a kind of interlock braking mechanism of wheel is provided, and this interlock braking mechanism is simple in structure, applicable to the synchronous brake of cardan wheel.
for achieving the above object, the technical solution adopted in the utility model is:
a kind of interlock braking mechanism of wheel, comprise the first wheel, the second wheel, the first fixed mount, the second fixed mount, be arranged on described the first fixed mount described the first vehicle wheel rotation, be arranged on described the second fixed mount described the second vehicle wheel rotation, on described the first fixed mount, be provided with rotationally first brake handle, described first brake on there is first brake bar, described the first wheel is provided with the first lock hole, described first brake is having normal danger and un-brake position, when it is during in normal danger, insert in described the first lock hole one end of described first brake bar, when it is during in un-brake position, described first brake bar departs from described the first lock hole, on described the first fixed mount, be also provided with for by described first brake the first lockout mechanism that is positioned to normal danger or un-brake position, on described the second fixed mount, be provided with rotationally the second brake handle, described second brake on there is the second brake lever, described the second wheel is provided with the second lock hole, described the second brake is having normal danger and un-brake position, when it is during in normal danger, insert in described the second lock hole one end of described the second brake lever, when it is during in un-brake position, described the second brake lever departs from described the second lock hole, on described the second fixed mount, be also provided with for by described the second brake second lockout mechanism that is positioned to normal danger or un-brake position, described braking mechanism also comprise for by described first brake handle and described the second brake interlock make described first brake, described the second brake the STATEMENT OF FEDERALLY SPONSORED in normal danger or un-brake position simultaneously, described STATEMENT OF FEDERALLY SPONSORED comprises trailing cable, one end of described trailing cable is connected to described first brake upper and depart from the centre of gration of described first brake handle, and the other end of described trailing cable is connected to described the second brake upper and depart from the described second centre of gration that brakes handle.
preferably, described trailing cable comprises that one end is connected to first brake upper the first trailing cable, one end are connected to described the second brake the second upper trailing cable, the 3rd trailing cable, one end of described the 3rd trailing cable is connected with the other end of described the first trailing cable by the first adapter, and the other end of described the 3rd trailing cable is connected with the other end of described the second trailing cable by the second adapter.
further preferably, on described the first adapter, offer the first groove, on described the second adapter, offer the second groove, the end that described the 3rd trailing cable and described the first trailing cable are connected on described the first adapter slidably and is rotationally embedded respectively in described the first groove, and the end that described the 3rd trailing cable and described the second trailing cable are connected on described the second adapter slidably and is rotationally embedded in described the second groove respectively.
still more preferably, described STATEMENT OF FEDERALLY SPONSORED also comprises a plurality of the 3rd adapters of being arranged on described the first fixed mount for described the first trailing cable is led, is arranged on a plurality of the 4th adapters for described the second trailing cable is led on described the second fixed mount.
preferably, described the first wheel is provided with first brake dish, on described first brake dish, offer a plurality of described the first lock holes, a plurality of described the first lock holes are distributed on take on described first brake dish on the circumference that the turning cylinder of described the first wheel is the center of circle, described the second wheel is provided with the second brake disc, on described the second brake disc, offer a plurality of described the second lock holes, a plurality of described the second lock holes are distributed on take on described the second brake disc on the circumference that the turning cylinder of described the second wheel is the center of circle.
preferably, described the first lockout mechanism comprises the first block of being located on described the first fixed mount, be located at slidably the slide block on described the first fixed mount, for first elastic component of described slide block along its direction of slip elastic-restoring force is provided, described first brake on there is the first projection, the second projection, when described first brake is when in normal danger, described slide block, described the first block between described the first projection and described the second projection and described slide block keep out at described the first projection on the sidepiece of described the second projection, described the first block is kept out on described the second projection, when described first brake is when in un-brake position, described slide block is kept out on described the first projection on the sidepiece away from described the second projection.
further preferably, the outer end of described slide block is tapered, and the described outer end of described slide block has the first inclined-plane and the second inclined-plane that is respectively used to keep out on described the first projection.
preferably, described the second lockout mechanism comprises the second block and the 3rd block be located on described the second fixed mount, be located at described the second block and described the second brake the second elastic component between an end, when described the second brake is when in normal danger, conflict respectively on described the second block, described the 3rd block in the two ends of described the second brake handle, when described the second brake is when in un-brake state, two ends and described the second block, described the 3rd block of described the second brake handle are separated.
further preferably, described second brake being roughly " 7 " font.
preferably, between described the first wheel and described the first fixed mount, be also provided with the first damping spring, described the first fixed mount can the vertically lifting setting of relatively described the first wheel under the resilient force of described the first damping spring; Between described the second wheel and described the second fixed mount, be also provided with the second damping spring, described the second fixed mount can the vertically lifting setting of relatively described the second wheel under the resilient force of described the second damping spring.
utilization due to technique scheme, the utility model compared with prior art has following advantages: the interlock braking mechanism of wheel of the present utility model, comprise the first wheel, the second wheel, wherein by trailing cable by the first brake handle for to the first wheel brake and for the second wheel is braked second brake interlock, make the first wheel and the second wheel can be simultaneously in braking state or un-brake state, this braking mechanism is simple in structure, easy to use, when the first wheel and the second vehicle wheel rotation direction change, on interlock braking mechanism, trailing cable can not be wound around, can be used for being provided with on the vehicle of cardan wheel the interlock brake for a plurality of wheels.
Accompanying drawing explanation
accompanying drawing 1 is the integral structure schematic diagram of braking mechanism of the present utility model when braking state;
accompanying drawing 2 is the inner structure schematic diagram of braking mechanism of the present utility model when braking state;
accompanying drawing 3 is the integral structure schematic diagram of braking mechanism of the present utility model when un-brake state;
accompanying drawing 4 is the inner structure schematic diagram of braking mechanism of the present utility model when un-brake state.
wherein:
1, the first wheel; 11, first brake dish; 12, the first lock hole;
2, the second wheel; 21, the second brake disc; 22, the second lock hole;
3, the first fixed mount; 4, the second fixed mount;
5, first brake mechanism; 51, first brake handle; 52, first brake bar; 53, slide block; 54, the first elastic component; 55, the first block; 56, the first projection; 57, the second projection;
6, the second braking mechanism; 61, first brake handle; 62, the second brake lever; 63, the second block; 64, the second elastic component; 65, the 3rd block;
7, STATEMENT OF FEDERALLY SPONSORED; 71, the first trailing cable; 72, the second trailing cable; 73, the 3rd trailing cable; 74, the first adapter; 75, the second adapter; 76, the 3rd adapter; 77, the 4th adapter;
8, the first damping spring; 9, the second damping spring.
The specific embodiment
below in conjunction with accompanying drawing and preferred embodiment of the present utility model, the technical solution of the utility model is further elaborated.
referring to the interlock braking mechanism of the wheel shown in Fig. 1～4, comprise that the first wheel 1 and the second wheel 2, the first wheels 1 and the second wheel 2 can be the front and back two-wheeled of vehicle, also can be the left and right two-wheeled of vehicle.The first wheel 1 is arranged on the first fixed mount 3 rotationally by turning cylinder, and the second wheel 2 is arranged on the second fixed mount 4 rotationally by turning cylinder, and the first fixed mount 3 and the second fixed mount 4 are connected on the car body of vehicle.The first wheel 1 and the second wheel 2 are realized brake or un-brake by first brake mechanism 5 and the second braking mechanism 6 respectively.
shown in Fig. 2, Fig. 4, the first lockout mechanism comprises the first block 55 of being located on the first fixed mount 3, is located at slide block 53 on the first fixed mount 3 slidably, for first spring 54 of slide block 53 along its direction of slip elastic-restoring force is provided, on the first block 55, there is an opening chute, slide block 53 is located in this opening chute slidably, and the first spring 54 is located between slide block 53 and the bottom land of opening chute.First brake is having the first projection 56 and the second projection 57 on 51, when first brake is 51 during in normal danger, slide block 53 and the first block 55 are all between the first projection 56 and the second projection 57, slide block 53 is kept out on the first projection 56 on the sidepiece of the second projection 57 under the effect of the first spring 54 elastic forces, the second projection 57 is kept out on the first block 55, and first brake is now locked and make the first wheel 1 be locked in this braking state 51; When first brake is 51 during in un-brake position, slide block 53 is kept out on the first projection 56 on the sidepiece away from the second projection 57 under the effect of the first spring 54 elastic forces.The outer end of slide block 53 is tapered, this outer end of slide block 53 has the first inclined-plane and second inclined-plane of keeping out on the first projection 56, first brake is also having an operating portion on 51, when needs are adjusted first brake framework 5 braking state, by operating portion, drive first brake 51 rotations, make the first inclined-plane or the second inclined-plane and the first projection 56 inconsistent, state conversion is convenient and locking is reliable.
shown in Fig. 1～4, the second braking mechanism 6 comprises that by bearing pin, being arranged on rotationally second on the second fixed mount 4 brakes 61, the axis parallel of this bearing pin is in the axial line of the second wheel 2 turning cylinders, the second brake is being fixedly provided with the second brake lever 62 on 61, the second wheel 2 is provided with the second brake disc 21, the second brake disc 21 is provided with a plurality of the second lock holes 22, and these a plurality of second lock holes 22 are distributed on take on the second brake disc 21 on the circumference that the turning cylinder of the second wheel 2 is the center of circle.When the second brake lever 62, insert in one of them second lock hole 22, the second brake is positioned at normal danger 61, and the second wheel is in braking state; When the second brake lever 62 departs from the second lock hole 22, the second brake is positioned at un-brake position 61, and the second wheel 2 is in un-brake state.The second braking mechanism 6 also comprise be located on the second fixed mount 4 for by the second brake 61 the second lockout mechanisms that are positioned at normal danger or un-brake position.
referring to Fig. 2, shown in Fig. 4, the second lockout mechanism comprises the second block 63 and the 3rd block 65 of being located on the second fixed mount 4, the second brake is roughly " 7 " font 61, its middle part is connected on the second fixed mount 4 rotationally, the second block 63 and the second brake are the second spring 64 between 61 1 ends, the second spring 64 can provide the second brake the elastic-restoring force of 61 rotations, when the second brake is 61 during in normal danger, the second brake is conflicted 61 two ends respectively on the second block 63 and the 3rd block 65, when the second brake is 61 during in un-brake state, the second brake 61 two ends respectively with the second block 63, the 3rd block 65 is separated.
shown in Fig. 1～4, this interlock braking mechanism also comprises for first brake being braked 61 STATEMENT OF FEDERALLY SPONSORED 7 of while in normal danger or un-brake position 61 interlocks 51 and second the 51 and second brake first brake, this STATEMENT OF FEDERALLY SPONSORED 7 comprises trailing cable, one end of trailing cable is connected to first brake on 51 and depart from first brake 51 centre of gration, and the other end of trailing cable is connected to the second brake on 61 and depart from the second brake 61 centre of gration.This trailing cable comprises the first trailing cable 71, the second trailing cable 72, the 3rd trailing cable 73, one end of the first trailing cable 71 is connected to first brake on 51, the other end of the first trailing cable 71 is connected with one end of the 3rd trailing cable 73 by the first adapter 74, one end of the second trailing cable 72 is connected to the second brake on 61, and its other end is connected with the other end of the 3rd trailing cable 73 by the second adapter 75.On the first adapter 74, offer the first groove, on the second adapter 75, offer the second groove, the end being connected on the 3rd trailing cable 73 and the first trailing cable 71 on the first adapter 74 slidably and is rotationally embedded respectively in the first groove, and the end that the 3rd trailing cable 73 and the second trailing cable 72 are connected on the second adapter 75 slidably and is rotationally embedded in the second groove respectively.On the first fixed mount 3, be also provided with on a plurality of the 3rd adapter 76, the second fixed mounts 4 for the first trailing cable 71 is led and be also provided with a plurality of the 4th adapters 77 for the second trailing cable 72 is led.Like this, when the front line direction of the first wheel 1, the second wheel 2 changes, can there is not the phenomenons such as winding in trailing cable, makes this interlock braking mechanism continue to can be used for the synchronous brake of two wheels or un-brake.
referring to Fig. 3, shown in Fig. 4, between the first wheel 1 and the first fixed mount 3, be also provided with the first damping spring 8, the first fixed mount 3 can relative the first vertically lifting of wheel 1 under the elastic acting force of the first damping spring 8, between the second wheel 2 and the second fixed mount 4, be also provided with the second damping spring 9, the second fixed mount 4 can relative the second vertically lifting of wheel 2 under the elastic acting force of the second damping spring 9, in the present embodiment, in first brake mechanism 5, the first fixed mount 3 comprises vertically two parts of relative slippage, the first block 55 and first brake are all located at the first fixed mount 3 with in a part 51, this part is arranged on the turning cylinder of the first wheel 1, the first damping spring 8 is located between first fixed mount 3 these two parts and for alleviating the vibrations that bring vehicle body when the first wheel 1 shakes, similarly, on the second braking mechanism 6, the second fixed mount 4 also comprises vertically two parts of relative slippage, the second brake is all located at the 61, second block 63 and the 3rd block 65 in a same part, and this part is located on the turning cylinder of the second wheel 2, the second damping spring 9 is located between second fixed mount 4 these two parts for alleviating the vibrations that bring vehicle body when the second wheel 2 shakes.By the switching of adapter, trailing cable is walked around the part of sliding block joint on the first fixed mount 3 and the second fixed mount 4, and this interlock braking mechanism still can normally be worked when wheel damping.
below specifically set forth the specific works process of the present embodiment:
shown in Fig. 3, Fig. 4, the first wheel 1, the second wheel 2 are in un-brake state, slide block 53 is kept out on the first projection 56 on the sidepiece away from the second projection 57 under the effect of the first spring 54 elastic forces, under the pulling force effect of trailing cable, the second brake is compressed the second spring 64, the second brakes 61 end 61 two ends and the second block 63, the 3rd block 65 is separated.When needs brake, stepping on first brake drives first brake 51 rotations the operating portion on 51, the first projection 56 compresses the first inclined-plane on slide block 53, the first spring 54 is compressed, treat that the first projection 56 crosses the first spring 54, slide block 53 falls between the first projection 56 and the second projection 57, slide block 53 is kept out on the first projection 56 on the sidepiece of the second projection 57 under the effect of the first spring 54 elastic forces, the second projection 57 is kept out on the first block 55, the first wheel 1 is locked under this braking state, simultaneously, because trailing cable is released, under the elastic acting force of the second spring 64, the second brake rotates 61, keep out respectively on the second block 63 and the 3rd block 65 at its two ends, now the second brake lever 62 is inserted in the second lock hole 22, the second wheel 2 is also locked to braking state.When needs release, contrarotation first brake is 51.
above-described embodiment is only explanation technical conceive of the present utility model and feature, and its object is to allow person skilled in the art can understand content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalences of doing according to the utility model Spirit Essence change or modify, within all should being encompassed in protection domain of the present utility model.
Claims (10)
1. the interlock braking mechanism of a wheel, comprise the first wheel (1), the second wheel (2), the first fixed mount (3), the second fixed mount (4), described the first wheel (1) is arranged on described the first fixed mount (3) rotationally, it is upper that described the second wheel (2) is arranged on described the second fixed mount (4) rotationally, it is characterized in that:
On described the first fixed mount (3), be provided with rotationally first brake (51), described first brake has first brake bar (52) on (51), described the first wheel (1) is provided with the first lock hole (12), described first brake has normal danger and un-brake position (51), when it is during in normal danger, insert in described the first lock hole (12) one end of described first brake bar (52); When it is during in un-brake position, described first brake bar (52) departs from described the first lock hole (12), is also provided with for described first brake being positioned to (51) to the first lockout mechanism of normal danger or un-brake position on described the first fixed mount (3);
On described the second fixed mount (4), be provided with rotationally the second brake (61), described the second brake has the second brake lever (62) on (61), described the second wheel (2) is provided with the second lock hole (22), described the second brake has normal danger and un-brake position (61), when it is during in normal danger, insert in described the second lock hole (22) one end of described the second brake lever (62); When it is during in un-brake position, described the second brake lever (62) departs from described the second lock hole (22), is also provided with for described the second brake is positioned to (61) to the second lockout mechanism of normal danger or un-brake position on described the second fixed mount (4);
Described braking mechanism also comprises for making described first brake (51) (52) interlock (51) and described the second brake described first brake, described the second brake is the STATEMENT OF FEDERALLY SPONSORED (7) of (52) while in normal danger or un-brake position, described STATEMENT OF FEDERALLY SPONSORED (7) comprises trailing cable, one end of described trailing cable is connected to described first brake handle (51) above and departs from described first brake the centre of gration of (51), the other end of described trailing cable is connected to described second and brakes (61) are upper and depart from described the second brake the centre of gration of (61).
2. the interlock braking mechanism of wheel according to claim 1, it is characterized in that: described trailing cable comprises that one end is connected to first brake the first trailing cable (71) on (51), one end is connected to described the second brake the second trailing cable (72) on (61), the 3rd trailing cable (73), one end of described the 3rd trailing cable (73) is connected with the other end of described the first trailing cable (71) by the first adapter (74), the other end of described the 3rd trailing cable (73) is connected with the other end of described the second trailing cable (72) by the second adapter (75).
3. the interlock braking mechanism of wheel according to claim 2, it is characterized in that: on described the first adapter (74), offer the first groove, on described the second adapter (75), offer the second groove, described the 3rd trailing cable (73) slidably and is rotationally embedded respectively in described the first groove with the end that described the first trailing cable (71) is connected on described the first adapter (74), described the 3rd trailing cable (73) slidably and is rotationally embedded in described the second groove respectively with the end that described the second trailing cable (72) is connected on described the second adapter (75).
4. according to the interlock braking mechanism of the wheel described in claim 2 or 3, it is characterized in that: described STATEMENT OF FEDERALLY SPONSORED also comprise be arranged on described the first fixed mount (3) upper for a plurality of the 3rd adapters (76) that described the first trailing cable (71) is led, be arranged on upper a plurality of the 4th adapters (77) for described the second trailing cable (72) is led of described the second fixed mount (4).
5. the interlock braking mechanism of wheel according to claim 1, it is characterized in that: described the first wheel (1) is provided with first brake dish (11), on described first brake dish (11), offer a plurality of described the first lock holes (12), a plurality of described the first lock holes (12) are distributed on the circumference that the upper turning cylinder of take described the first wheel (1) of described first brake dish (11) is the center of circle, described the second wheel (2) is provided with the second brake disc (21), on described the second brake disc (21), offer a plurality of described the second lock holes (22), a plurality of described the second lock holes (22) are distributed on the circumference that the upper turning cylinder of take described the second wheel (2) of described the second brake disc (21) is the center of circle.
6. the interlock braking mechanism of wheel according to claim 1, it is characterized in that: described the first lockout mechanism comprises the first block (55) of being located on described the first fixed mount (3), be located at slidably the slide block (53) on described the first fixed mount (3), be used for providing first elastic component (54) of described slide block (53) along its direction of slip elastic-restoring force, described first brake has the first projection (56) on (51), the second projection (57), when described first brake is (51) during in normal danger, described slide block (53), described the first block (55) is positioned between described the first projection (56) and described the second projection (57) and described slide block (53) is kept out at described the first projection (56) on the sidepiece of described the second projection (57), described the first block (55) is kept out on described the second projection (57), when described first brake is (51) during in un-brake position, described slide block (53) is kept out on the upper sidepiece away from described the second projection (57) of described the first projection (56).
7. the interlock braking mechanism of wheel according to claim 6, it is characterized in that: the outer end of described slide block (53) is tapered, the described outer end of described slide block (53) has the first inclined-plane and the second inclined-plane that is respectively used to keep out on described the first projection (56).
8. the interlock braking mechanism of wheel according to claim 1, it is characterized in that: described the second lockout mechanism comprises the second block (63) and the 3rd block (65) of being located on described the second fixed mount (4), be located at described the second block (63) and described the second brake the second elastic component (64) between (61) one ends, when described the second brake is (61) during in normal danger, described the second brake conflicts respectively the two ends of (61) at described the second block (63), on described the 3rd block (65), when described the second brake is (61) during in un-brake state, described the second brake is the two ends of (61) and described the second block (63), described the 3rd block (65) is separated.
9. the interlock braking mechanism of wheel according to claim 8, is characterized in that: described the second brake is roughly " 7 " font (61).
10. the interlock braking mechanism of wheel according to claim 1, it is characterized in that: between described the first wheel (1) and described the first fixed mount (3), be also provided with the first damping spring (8), described the first fixed mount (3) can vertically lifting setting of relatively described the first wheel (1) under the resilient force of described the first damping spring (8); Between described the second wheel (2) and described the second fixed mount (4), be also provided with the second damping spring (9), described the second fixed mount (4) can vertically lifting setting of relatively described the second wheel (2) under the resilient force of described the second damping spring (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320613149.8U CN203528569U (en) | 2013-09-30 | 2013-09-30 | Linkage braking mechanism of wheels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320613149.8U CN203528569U (en) | 2013-09-30 | 2013-09-30 | Linkage braking mechanism of wheels |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203528569U true CN203528569U (en) | 2014-04-09 |
Family
ID=50414816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320613149.8U Expired - Lifetime CN203528569U (en) | 2013-09-30 | 2013-09-30 | Linkage braking mechanism of wheels |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203528569U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104972832A (en) * | 2015-08-05 | 2015-10-14 | 丁怡 | Traction braking universal wheel |
-
2013
- 2013-09-30 CN CN201320613149.8U patent/CN203528569U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104972832A (en) * | 2015-08-05 | 2015-10-14 | 丁怡 | Traction braking universal wheel |
| CN104972832B (en) * | 2015-08-05 | 2018-04-13 | 丁怡 | Draw dynamic braking universal wheel |
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| GR01 | Patent grant |