CN110450845A - A kind of braking mechanism and the trolley using the braking mechanism - Google Patents
A kind of braking mechanism and the trolley using the braking mechanism Download PDFInfo
- Publication number
- CN110450845A CN110450845A CN201910844218.8A CN201910844218A CN110450845A CN 110450845 A CN110450845 A CN 110450845A CN 201910844218 A CN201910844218 A CN 201910844218A CN 110450845 A CN110450845 A CN 110450845A
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- Prior art keywords
- connecting shaft
- sticking department
- wheel
- column
- braking mechanism
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- 230000007246 mechanism Effects 0.000 title claims abstract description 29
- 230000000903 blocking effect Effects 0.000 claims abstract description 25
- 230000007704 transition Effects 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B9/00—Accessories or details specially adapted for children's carriages or perambulators
- B62B9/08—Braking mechanisms; Locking devices against movement
- B62B9/082—Braking mechanisms; Locking devices against movement foot operated
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Handcart (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses a kind of braking mechanism and use the trolley of the braking mechanism, wherein braking mechanism includes the promotion part that the first sticking department being arranged on hub for vehicle wheel, the second sticking department being slidably located in wheel connecting shaft and the second sticking department of promotion slide to the first sticking department in connecting shaft, first sticking department is equipped with the lock projection or locking groove of limiting wheel rotation, and second sticking department is equipped with the locking groove matched with the lock projection or locking groove or lock projection；The promotion part includes the rotating part being set in connecting shaft, for the rotating part is provided with rotation forces structure between rotating part and the blocking portion stating against and with the blocking portion that is fixedly connected of connecting shaft and setting, and when rotating part rotation, rotation forces structure pushes rotating part mobile to the second sticking department.
Description
Technical field
The present invention relates to a kind of braking mechanism and using the trolley of the braking mechanism, belong to perambulator field.
Background technique
Carriage for children is children's amusement and recreation and the common tool ridden instead of walk, and when common carriage for children brake, brake block rubs vehicle
Wheel makes wheel stop operating, and the brake structure of such setting is larger to the tire damage of wheel, and the strength of children is little, very much
When a certain distance carriage for children that needs to rub can just halt, such situation cannot avert danger in time.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of friction tires that do not need can be achieved with the braking machine of brake
Structure.
To achieve the above object, the present invention provides the following technical scheme that a kind of braking mechanism, including it is arranged in vehicle wheel
The first sticking department on hub, the second sticking department being slidably located in wheel connecting shaft and push the second sticking department in connecting shaft
On slide to the promotion part of the first sticking department, first sticking department be equipped with limiting wheel rotation lock projection or locking it is recessed
Slot, second sticking department are equipped with the locking groove matched with the lock projection or locking groove or lock projection；Institute
State promotion part include the rotating part being set in connecting shaft, for the rotating part against and with the blocking portion that is fixedly connected of connecting shaft
And setting is provided with rotation forces structure stating between rotating part and the blocking portion, the rotation forces structure when rotating part rotation
Push rotating part mobile to the second sticking department；Brake, same phase can be realized without friction wheel in the braking mechanism of such setting
Compared with for friction brake, the present invention realizes that brake does not need very big power, and foot is stepped on and can be braked, and more convenient children make
With.
The present invention is further arranged to, the rotation forces structure include the convex block being arranged on the rotating part side wall or
The sliding surface or convex block that corresponding position is arranged on sliding surface and the blocking portion side wall, the convex block are sliding on the sliding surface
Dynamic, the sliding surface is arranged along rotary body rotation direction, and the sliding surface intersects with the vertical plane of the connecting shaft axis；It is such
Setting is so that convex block on sliding surface when sliding, and rotary body is close to or far from wheel, to push the second sticking department close or remote
From wheel make lock projection be trapped in locking groove in or lock projection be detached from locking groove.
The present invention is further arranged to, and the sliding surface is inclined surface or at least one section of inclined surface, the inclined surface phase
Longitudinal cross-section inclination for connecting shaft, the rotary body are equipped with the pedal trampled for foot.
The present invention is further arranged to, convex block described in the sliding surface at least one section of inclined surface and the sliding face contact
Face be the curved surface containing one section of inclined surface, the centre of the sliding surface is inclined surface, and both ends are and the convex block curved surface cooperates
Transition face；Transition face is curved surface, and the setting of transition face curved surface keeps brake process more stable.
The present invention is further arranged to, and the sliding surface is smooth curved surface.
The present invention is further arranged to, the blocking portion or the recessed formation sliding slot of rotation body sidewall, the sliding surface
Form the sliding slot bottom surface；The side wall of sliding slot can stop convex block, and convex block is avoided to overturn, and increase avoids rotary body in brake process from shaking
It is dynamic.
The present invention is further arranged to, and first sticking department is annulus column, and the lock projection or locking groove setting exist
The end face of the first sticking department of annulus column；Second sticking department includes small one and large one the two concentric circles annulated column being connected, great circle
The internal diameter of annulated column is greater than the internal diameter of roundlet annulated column, and large circle column sleeve is on the first sticking department, and small circle ring column sleeve is in connecting shaft, greatly
The inner wall of the junction of annulus column and roundlet annulated column be equipped with on the first sticking department lock projection or locking groove it is corresponding
Lock groove or lock projection；Such setting keeps brake structure compact, and multiplex roles was avoided to be exposed to outside.
The present invention is further arranged to, and further includes the elastic component resetted for second sticking department, and the elastic component is located at
Between second sticking department and connecting shaft, the elastic component is located in connecting shaft, close to promotion part on second sticking department
One end be equipped with inside internal projection, connecting shaft is equipped with the strip-shaped groove that cooperates with the internal projection, and the internal projection is supported
One end of the elastic component is kept off, connecting shaft is equipped with the elastic component shelves for stopping the elastic component other end；When brake, the second sticking department to
When mobile close to the direction of wheel, compressed spring, after the power trampled disappears, spring, which restores to the original state, pushes the second sticking department towards remote
Direction from wheel is mobile, that is, realizes and reset, and the setting of internal projection and groove avoids the second sticking department from rotating relative to connecting shaft,
More convenient limit.
The present invention is further arranged to, and the elastic component is spring, and the elastic component shelves are spring shelves, the spring shelves packet
A thick thin two annulus column is included, the outer diameter of thick annulus column is greater than the outer diameter of fine circle column, and thick annulus column is tightly placed in connecting shaft end,
Fine circle column is located in the annulus of the first sticking department of annulus column, and the end of fine circle column is resisted against in the wheel hub or wheel of wheel
On bearing inner race at the heart；Such setting can be such that spring shelves are resisted against on bearing inner race, and spring shelves end is avoided to hinder wheel
Rotation.
A kind of trolley, including vehicle frame, front wheels and rear wheels, there are two the rear-wheel settings, is arranged between two rear-wheels
There are crosspiece and connecting shaft, the connecting shaft is arranged in the both ends of crosspiece, above-mentioned braking machine is provided in connecting shaft and hub for vehicle wheel
Structure is connected by screw bolts between the rear-wheel and connecting shaft.
The present invention is further arranged to, and the cross section of the crosspiece is in track type, on blocking portion far from wheel one towards
Direction far from wheel extends to form the mounting portion connecting with crosspiece, and the mounting portion is hollow setting, sets on the mounting portion
There is clamp button of the spring, crosspiece is equipped with the block button hole stretched out for clamp button of the spring.
Detailed description of the invention
Fig. 1 is the structure sectional view of braking mechanism of the present invention；
Fig. 2 is the structure disassembly diagram of braking mechanism of the present invention；
Fig. 3 is the structural schematic diagram of the second sticking department in Fig. 1；
Fig. 4 is the structural schematic diagram of spring shelves in Fig. 1；
Fig. 5 is the structural schematic diagram of rotating part in Fig. 1；
Fig. 6 is the structural schematic diagram one of blocking portion, connecting shaft, mounting portion in Fig. 1；
Fig. 7 is the structural schematic diagram two of blocking portion, connecting shaft, mounting portion in Fig. 1；
The structural schematic diagram of Fig. 8 trolley of the present invention.
In figure: 2, the second sticking department；21, lock projection；22, great circle annulated column；23, roundlet annulated column；3, rotating part；31, it steps on
Pedal；32, convex block；4, blocking portion；41, sliding surface；411, transition face；412, inclined surface；5, spring；6, spring shelves；61, thin
Annulus column；62, thick annulus column；63, anti-rotation protrusion；7, connecting shaft；8, mounting portion；9, clamp button of the spring；11, the first sticking department；
111, groove is locked；12, wheel hub；13, bearing；14, bolt；101, rear-wheel；102, front-wheel；103, crosspiece；104, vehicle frame.
Specific embodiment
The embodiment of a kind of braking mechanism of 1 to 8 couple of present invention and the trolley using the braking mechanism with reference to the accompanying drawing
It further illustrates.
As illustrated in fig. 1 and 2, braking mechanism, including be arranged on hub for vehicle wheel 12 the first sticking department 11, be slidably located in
The promotion part and locked for second that the second sticking department 2, the second sticking department 2 of promotion in wheel connecting shaft 7 slide in connecting shaft 7
Determine the elastic component of the reset of portion 2.
First sticking department 11 is the annulus column concentric with wheel, the first sticking department 11 and 12 one of hub for vehicle wheel
Molding, columnar first sticking department, 11 end face of annulus are equipped with the locking groove 111 of limiting wheel rotation, and above-mentioned locking groove is set
Several are equipped with, is evenly distributed on circular 11 end face of the first sticking department.
As shown in figure 3, second sticking department 2 includes small one and large one two concentric circles annulated column, the internal diameter of great circle annulated column 22 is big
In the internal diameter of roundlet annulated column 23,22 sets of great circle annulated column on the first sticking department 11,23 sets of roundlet annulated column in connecting shaft 7, great circle
The junction of annulated column 22 and roundlet annulated column 23 forms step, and step is equipped with the lock projection cooperated with above-mentioned locking groove 111
21。
Above-mentioned lock projection 21 also can be set on the first sticking department, and locking groove 111 is arranged on the second sticking department.
As illustrated in fig. 1 and 2, above-mentioned elastic component is spring 5, and the spring 5 is set in connecting shaft 7, and spring 5 is located at roundlet
Between annulated column 23 and connecting shaft 7,23 end of roundlet annulated column is equipped with inside internal projection, and the internal projection keeps out the spring 5
One end, connecting shaft 7 are equipped with the groove cooperated with the internal projection, and the groove is in long strip, and 2 portion of being pushed into of the second sticking department pushes away
When dynamic, internal projection is slided in the strip-shaped groove；7 one end of connecting shaft is additionally provided with the spring shelves 6 for stopping 5 other end of spring.
As shown in figure 4, the spring shelves 6 include a thick thin two annulus column, the outer diameter of thick annulus column 62 is greater than fine circle column
61 outer diameter, thick annulus column 62 are tightly placed in 7 end of connecting shaft, and thick 62 inner wall of annulus column is equipped with to match with 7 upper groove of connecting shaft
The anti-rotation protrusion 63 of conjunction, fine circle column 61 are located in the annulus of the first sticking department of annulus column 11, and the end of fine circle column 61 is supported
It leans against on 13 inner ring of bearing.
As illustrated in fig. 1 and 2, the promotion part include the rotating part 3 being set in connecting shaft 7, for the rotating part 3 against
Blocking portion 4 and rotation forces structure, the rotating part 3 can be rotated around connecting shaft 7, which is fixed in connecting shaft 7；Rotation
Turning pushing structure includes the convex block 32 being arranged on rotating part side wall and the sliding surface being arranged on blocking portion side wall.
As it can be seen in figures 5 and 6, above-mentioned convex block 32 is arranged on 3 side wall of rotating part, and it is integrally formed with rotating part；The rotation
Transfer part is equipped with the pedal 31 trampled for foot, and pedal 31 and rotating part are integrally formed；The convex block 32 towards blocking portion 4,
32 position of convex block is corresponded on 4 side wall of blocking portion to hang down equipped with sliding surface 41, above-mentioned 3 side wall of rotating part and 4 side wall of blocking portion
Directly in connecting shaft 7, with the rotation of rotating part 3, which slides on the sliding surface, and at least one section of the sliding surface is inclined
Inclined-plane 412, which is obliquely installed relative to 7 longitudinal cross-section of connecting shaft so that inclined surface one end is closer to wheel, the other end
Far from wheel, which refers to the face perpendicular to shaft axis；The face of the convex block 32 and the sliding face contact be containing
The centre of the curved surface of one section of inclined surface 412, the sliding surface is inclined surface, and both ends are the transition cooperated with 32 curved surface of convex block
Face 411, the transition face are curved surface；The recessed formation sliding slot of 4 side wall of blocking portion, the sliding surface form the sliding slot bottom surface.
Foot, which steps on pedal 31, rotates rotating part 3 around connecting shaft 7, and the convex block 32 on 3 side wall of rotating part is arranged in rotation
The rotation in portion 3 is rotated around connecting shaft 7, causes convex block 32 to slide on sliding surface, since sliding surface has one section of inclined surface, convex block 32
When sliding on inclined surface, inclined surface promotes convex block 32 to translate in connecting shaft 7, and then realizes that rotating part 3 is put down in connecting shaft 7
It moves, and then pushes the second sticking department 2 close to the first sticking department 11, the protrusion on the second sticking department 2 falls into the first sticking department at this time
In 11 groove, that is, limit vehicle wheel rotation.
In another embodiment, sliding surface 41 is smooth curved surface, which is strip setting, and one end is close to vehicle
Wheel, the other end is far from wheel；In terms of the side of the curved surface, which is similar to sinusoidal or cosine curve interlude.
Above-mentioned sliding surface 41 moves closer in convex block rotation direction or far from the first sticking department.
As shown in Fig. 1,2,6 and 7, above-mentioned blocking portion 4 is integrally formed with connecting shaft 7, and the cross section of above-mentioned crosspiece 103 is in race
Road shape one extends to form mounting portion 8 away from the direction of wheel far from wheel on blocking portion 4, and mounting portion 8 can be with carriage for children
Rear-wheel between the crosspiece that is arranged be coupled, the mounting portion 8 is hollow setting, and mounting portion 8 is equipped with clamp button of the spring 9, horizontal
Shelves 103 are equipped with the block button hole stretched out for clamp button of the spring 9, and mounting portion 8 and 4 junction of blocking portion are equipped with the nut for accommodating nut
Slot, bolt 14 sequentially pass through bearing 13, spring shelves 6, connecting shaft 7 and blocking portion 4 and connect with nut thread.
As shown in figure 8, a kind of baby carriage, including vehicle frame 104, front-wheel 102 and rear-wheel 101, the rear-wheel 101 are arranged
There are two, crosspiece 103 and connecting shaft 7 are provided between two rear-wheels 101, the setting of connecting shaft 7 is at 103 both ends of crosspiece, even
Spindle 7 is equipped with above-mentioned braking mechanism.Bearing 13, rear-wheel 101 and connecting shaft 7 are installed among the wheel hub 12 of above-mentioned rear-wheel 101
Between connected by bolt 14, above-mentioned bolt 14 passes through bearing 13, and above-mentioned connecting shaft 7 and hub for vehicle wheel are equipped with braking mechanism.
It is arranged on rotating part 3 with convex block 32 below and illustrates principle of braking, when needing to brake, tramples pedal 31, at this time
Rotating part 3 rotates, and the convex block 32 on rotating part 3 slides on sliding surface 41, and because sliding surface 41 is obliquely installed, convex block 32 exists at this time
Drive rotating part 3 mobile towards the direction close to wheel under the blocking of sliding surface 41, rotating part 3 pushes the second sticking department 2 to close
The direction of first sticking department 11 is slided, until lock projection 21 is fallen into locking groove 111, wheel stops operating at this time, i.e., in fact
Now brake.
Braking mechanism in the present invention is not limited to apply on trolley, is equally applicable to have connecting shaft 7 in two-wheeled
Other carriages for children.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of braking mechanism, which is characterized in that including be arranged on hub for vehicle wheel the first sticking department, be slidably located in wheel
The second sticking department in connecting shaft and the second sticking department is pushed to slide to the promotion part of the first sticking department in connecting shaft, described the
One sticking department is equipped with the lock projection of limiting wheel rotation or locking groove, second sticking department are equipped with and the locking
The locking groove or lock projection that protrusion or locking groove match；The promotion part includes the rotation being set in connecting shaft
Portion is stating between rotating part and the blocking portion for the rotating part against and with the blocking portion that is fixedly connected of connecting shaft and setting
Rotation forces structure, when rotating part rotation, rotation forces structure pushes rotating part mobile to the second sticking department.
2. braking mechanism according to claim 1, which is characterized in that the rotation forces structure includes being arranged in the rotation
The sliding surface or convex block that corresponding position is arranged on convex block or sliding surface and the blocking portion side wall on the side wall of transfer part, it is described convex
Block slides on the sliding surface, and the sliding surface is arranged along rotary body rotation direction, the sliding surface and the connecting shaft axis
The vertical plane of line intersects.
3. braking mechanism according to claim 2, which is characterized in that the sliding surface is that inclined surface or at least one section incline
Inclined-plane, the inclined surface are tilted relative to the longitudinal cross-section of connecting shaft, and the rotary body is equipped with the pedal trampled for foot.
4. braking mechanism according to claim 3, which is characterized in that the sliding surface at least one section of inclined surface, it is described
The face of convex block and the sliding face contact is the curved surface containing one section of inclined surface, and the centre of the sliding surface is inclined surface, both ends
For the transition face cooperated with the convex block curved surface.
5. braking mechanism according to claim 2, which is characterized in that the sliding surface is smooth curved surface.
6. carriage for children braking mechanism according to claim 2, which is characterized in that the blocking portion or the rotation body sidewall
It is recessed sliding slot, the sliding surface forms the sliding slot bottom surface.
7. braking mechanism according to claim 2, which is characterized in that first sticking department is annulus column, the lock
The end face of the first sticking department of annulus column is arranged in tight protrusion or locking groove；Second sticking department include be connected it is one big
One small two concentric circles annulated column, the internal diameter of great circle annulated column are greater than the internal diameter of roundlet annulated column, and large circle column sleeve is small on the first sticking department
In connecting shaft, the inner wall of the junction of great circle annulated column and roundlet annulated column is equipped with and the locking on the first sticking department annulus column sleeve
Protrusion or the corresponding locking groove of locking groove or lock projection.
8. braking mechanism according to claim 1-5, which is characterized in that further include multiple for second sticking department
The elastic component of position, between second sticking department and connecting shaft, the elastic component is located in connecting shaft the elastic component, institute
It states one end on the second sticking department close to promotion part and is equipped with inside internal projection, connecting shaft, which is equipped with, to be cooperated with the internal projection
Strip-shaped groove, the internal projection keep out one end of the elastic component, and connecting shaft is equipped with the elasticity for stopping the elastic component other end
Part shelves.
9. braking mechanism according to claim 8, which is characterized in that the elastic component is spring, and the elastic component shelves are
Spring shelves, the spring shelves include the thick thin two annulus column being connected, and the outer diameter of thick annulus column is greater than the outer of fine circle column
Diameter, thick annulus column are tightly placed in connecting shaft end, and fine circle column is located in the annulus of the first sticking department of annulus column, fine circle column
End is resisted against on the bearing inner race at wheel center.
10. a kind of trolley, including vehicle frame, front wheels and rear wheels, which is characterized in that there are two the rear-wheel settings, after two is described
Crosspiece and connecting shaft are provided between wheel, the connecting shaft is arranged in the both ends of crosspiece, is provided on connecting shaft and hub for vehicle wheel
The described in any item braking mechanisms of claim 1-9, are connected by screw bolts between the rear-wheel and connecting shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910844218.8A CN110450845B (en) | 2019-09-07 | 2019-09-07 | Brake mechanism and handcart using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910844218.8A CN110450845B (en) | 2019-09-07 | 2019-09-07 | Brake mechanism and handcart using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110450845A true CN110450845A (en) | 2019-11-15 |
| CN110450845B CN110450845B (en) | 2024-04-05 |
Family
ID=68491108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910844218.8A Active CN110450845B (en) | 2019-09-07 | 2019-09-07 | Brake mechanism and handcart using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110450845B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0858940A1 (en) * | 1997-02-18 | 1998-08-19 | CAM IL MONDO DEL BAMBINO S.p.A. | Braking device particularly for baby carriages, strollers and the like |
| CN1201742A (en) * | 1998-06-29 | 1998-12-16 | 好孩子集团公司 | Locking mechanism of pushchair |
| CN102343928A (en) * | 2010-08-03 | 2012-02-08 | 明门香港股份有限公司 | baby carriage and baby carriage braking mechanism |
| CN103661546A (en) * | 2012-09-12 | 2014-03-26 | 明门香港股份有限公司 | Braking mechanism and baby carriage with the same |
| CN103796900A (en) * | 2011-08-25 | 2014-05-14 | 康贝株式会社 | Wheel holding mechanism for baby carriage, and baby carriage |
| CN106672058A (en) * | 2015-11-08 | 2017-05-17 | 匡桃红 | Shake-free folding joint for baby stroller |
| CN210592088U (en) * | 2019-09-07 | 2020-05-22 | 永康市东玮工贸有限公司 | Brake mechanism and use this brake mechanism's handcart |
-
2019
- 2019-09-07 CN CN201910844218.8A patent/CN110450845B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0858940A1 (en) * | 1997-02-18 | 1998-08-19 | CAM IL MONDO DEL BAMBINO S.p.A. | Braking device particularly for baby carriages, strollers and the like |
| CN1201742A (en) * | 1998-06-29 | 1998-12-16 | 好孩子集团公司 | Locking mechanism of pushchair |
| CN102343928A (en) * | 2010-08-03 | 2012-02-08 | 明门香港股份有限公司 | baby carriage and baby carriage braking mechanism |
| CN103796900A (en) * | 2011-08-25 | 2014-05-14 | 康贝株式会社 | Wheel holding mechanism for baby carriage, and baby carriage |
| CN103661546A (en) * | 2012-09-12 | 2014-03-26 | 明门香港股份有限公司 | Braking mechanism and baby carriage with the same |
| CN106672058A (en) * | 2015-11-08 | 2017-05-17 | 匡桃红 | Shake-free folding joint for baby stroller |
| CN210592088U (en) * | 2019-09-07 | 2020-05-22 | 永康市东玮工贸有限公司 | Brake mechanism and use this brake mechanism's handcart |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110450845B (en) | 2024-04-05 |
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