WO2020034915A1 - Chariot - Google Patents

Chariot Download PDF

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Publication number
WO2020034915A1
WO2020034915A1 PCT/CN2019/100167 CN2019100167W WO2020034915A1 WO 2020034915 A1 WO2020034915 A1 WO 2020034915A1 CN 2019100167 W CN2019100167 W CN 2019100167W WO 2020034915 A1 WO2020034915 A1 WO 2020034915A1
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WO
WIPO (PCT)
Prior art keywords
rod
frame
rotatably connected
trolley
state
Prior art date
Application number
PCT/CN2019/100167
Other languages
English (en)
Chinese (zh)
Inventor
朱华斌
吴凡祥
Original Assignee
东莞金旺儿童用品有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 东莞金旺儿童用品有限公司 filed Critical 东莞金旺儿童用品有限公司
Publication of WO2020034915A1 publication Critical patent/WO2020034915A1/fr

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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
    • B62B7/00—Carriages for children; Perambulators, e.g. dolls' perambulators
    • B62B7/04—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor
    • B62B7/06—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable

Definitions

  • the invention relates to the technical field of hand trucks, in particular to a hand truck.
  • the handcart has a large size and a high height after being folded, and is not convenient to store and carry after being folded. It does not have portability and cannot take into account the folding driving force and the folding height.
  • an object of the present invention is to provide a trolley, which has sufficient driving force and has a low overall height after being folded.
  • a cart includes a cart frame having an unfolded state and a folded state, a front wheel assembly, and a rear wheel assembly.
  • the cart frame includes: a frame front rod, the frame front rod extending from front to The rear rod extends obliquely upward; the rear rod of the frame extends obliquely downwards from front to back, and the rear rod of the frame includes a lower rear rod and an upper rear rod that can slide and retract relatively; Can be switched between extended and shortened states; putter, the putter includes a lower putter and an upper putter, both the upper putter and the lower putter are inclined to extend upward from front to back, and the lower The front end of the push rod is rotatably connected to the front end of the upper rear rod, and the rear end of the lower push rod is rotatably connected to the front end of the upper push rod; a first extension rod, the first extension rod is inclined upward from front to back Extended, the front end of the first extension rod is rotatably connected to the rear end of the
  • a transmission rod one end of the transmission rod is rotationally connected to the lower push rod; a second linkage mechanism A front end of the second linkage mechanism is rotatably connected with the front rod of the frame, a rear end of the second linkage mechanism is rotatably connected with the other end of the transmission rod and the upper rear rod, and the cart
  • the transmission rod rotates to drive the second linkage mechanism to rotate to drive the front rod of the frame toward the rear rod of the frame.
  • the cart of the embodiment of the present invention not only the folding and unfolding operation of the cart is convenient and simple, but also it is connected to the upper and rear rods through the rotation of the strut.
  • the connection position is relatively high.
  • the driving force is sufficient and the length of the strut is moderate.
  • the length of the lower rear rod does not need to be very long, so that the length of the upper rear rod can be contracted is longer, in addition, by setting the first extension rod, it can be reduced
  • the length of the front rod of the frame can be significantly reduced after the trolley is folded, and the overall structure of the trolley is more compact, which is convenient to carry and store.
  • trolley according to the embodiment of the present invention may also have the following additional technical features:
  • the first linkage mechanism includes: a connecting rod whose lower end is rotationally connected to the lower rear rod; and a crank, whose lower end is rotationally connected to the upper end of the link.
  • the upper end of the crank is fixedly connected with the strut to be driven to rotate by the strut, and when the strut is moved, the rear lever of the frame is switched between the extended state and the shortened state .
  • the second linkage mechanism includes: a first link, a front end of the first link is rotatably connected to the front rod of the frame; a second link, the second link
  • the front end of the second connecting rod is rotatably connected to the rear end of the first connecting rod
  • the rear end of the second connecting rod is rotatably connected to the other end of the upper rear rod and the transmission rod, respectively.
  • the relative rotation axis between the two links does not overlap with the relative rotation axis between the second link and the upper rear rod.
  • the trolley further includes a connecting member, the connecting member is provided at a front end of the lower rear rod and is detachably connected to the lower rear rod, and the lower rear rod passes through the connecting member. It is rotatably connected with the connecting rod.
  • the upper rear rod passes through the connecting member and is telescopically embedded in the lower rear rod.
  • the connecting member includes a first connecting section and a second connecting section connected to each other.
  • the first connecting section is exposed on the outside of the lower rear rod and is rotatably connected to the connecting rod; the second connecting section is embedded in the lower rear rod and is detachably connected to the lower rear rod .
  • an end of the upper rear rod embedded in the lower rear rod is provided with an abutment block, and the abutment block may abut against an end of the second connecting section to limit the The length of the upper rear rod extending beyond the lower rear rod.
  • a lateral width of the front wheel assembly is smaller than a lateral width of the rear wheel assembly.
  • the front wheel assembly is located at the rear in the lateral direction. Between wheel assemblies.
  • the trolley further includes a seat rod, and the seat rod is rotatably connected to the lower push rod and the support rod, respectively, and as the trolley frame is unfolded and folded, the trolley
  • the seat bar has a switchable expanded state and a folded state.
  • the trolley further includes a handrail bar, and the handrail bar is rotatably connected to the lower push rod and the stay rod, respectively, and as the cart frame is unfolded and folded,
  • the armrest has a switchable expanded state and a folded state.
  • a lock member is provided on the lower rear lever, and a lock member is provided on the upper push rod.
  • the lock member can cooperate with the lock member to lock the The trolley is locked in the folded state.
  • FIG. 1 is a schematic structural diagram of a hand cart in an unfolded state according to an embodiment of the present invention
  • FIG. 2 is a partial structural diagram of the trolley shown in FIG. 1;
  • FIG. 2 is a partial structural diagram of the trolley shown in FIG. 1;
  • FIG. 3 is a schematic structural view of a part of the trolley shown in FIG. 2;
  • FIG. 4 is a partial structural diagram of the trolley shown in FIG. 3; FIG.
  • FIG. 5 is a schematic diagram of an assembly structure between an upper rear rod and a lower rear rod of a trolley according to an embodiment of the present invention
  • FIG. 6 is an exploded view of the structure shown in FIG. 5;
  • FIG. 7 is a schematic structural diagram of an upper rear lever of a trolley according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a connecting member of a trolley according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a trolley in a folding or unfolding process according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a hand cart in a folded state according to an embodiment of the present invention.
  • FIG. 11 is a schematic view of the trolley shown in FIG. 10 from another angle.
  • Pusher 3 Pusher 31; Locking member 311; Handle 312; Car button 3121;
  • Second linkage mechanism 8 first link 81; second link 82;
  • Front wheel assembly 9 left front wheel 91; right front wheel 92
  • Rear wheel assembly 10 left rear wheel 101; right rear wheel 102;
  • a cart 100 according to an embodiment of the present invention is described below with reference to FIGS. 1 to 11.
  • a cart 100 includes a cart frame, a front wheel assembly 9, and a rear wheel assembly 10, wherein the cart frame includes: a frame front rod 1, and a frame rear rod. 2.
  • Push rod 3 first extension rod 4, support rod 5, transmission rod 6, first linkage mechanism 7 and second linkage mechanism 8.
  • the cart frame has an unfolded state (refer to FIG. 1) and a folded state (refer to FIGS. 10 to 11).
  • the front frame rod 1 extends obliquely from front to back, and the front end of the front frame rod 1 is provided with a front wheel assembly 9.
  • the rear frame rod 2 extends downwards from front to back.
  • the rear frame rod 2 includes a lower rear rod 22 and an upper rear rod 21 which can be relatively slidably retracted.
  • the rear frame rod 2 can be switched between an extended state and a shortened state. Specifically, when the lower rear lever 22 and the upper rear lever 21 are relatively slide-extended, the frame rear lever 2 may be switched to an extended state (refer to FIG. 1 to FIG. 4). When the relative sliding is shortened, the rear frame rod 2 can be switched to the shortened state (refer to FIGS. 10 to 11).
  • a rear wheel assembly 10 is provided at the rear end of the lower rear lever 22.
  • the putter 3 includes a lower putter 32 and an upper putter 31. Both the upper putter 31 and the lower putter 32 are inclined to extend upward from front to back.
  • the front end of the lower putter 32 is rotatably connected to the front end of the upper rear lever 21.
  • the rear end of 32 is rotatably connected to the front end of the upper push rod 31.
  • the first extension rod 4 extends obliquely from front to back.
  • the front end of the first extension rod 4 is rotatably connected to the rear end of the frame front rod 1.
  • the rear end of the first extension rod 4 is fixedly connected to the front end of the upper rear rod 21. In the unfolded state, the first extension rod 4 and the frame front rod 1 are substantially in a straight line.
  • the front end of the stay 5 is rotatably connected to the upper rear bar 21, the rear end of the stay 5 is rotatably connected to the upper push rod 31, and a first linkage mechanism 7 is provided between the front end of the stay 5 and the lower rear 22.
  • the first linkage mechanism 7 is driven to rotate to drive the relative sliding expansion between the upper rear lever 21 and the lower rear lever 22.
  • One end of the transmission rod 6 is rotatably connected to the lower push rod 32
  • the front end of the second linkage mechanism 8 is rotatably connected to the front frame rod 1
  • the rear end of the second linkage mechanism 8 is connected to the other end of the transmission rod 6 and the upper rear rod 21, respectively.
  • the transmission rod 6 rotates to drive the second linkage mechanism 8 to rotate to drive the front frame 1 of the frame toward the rear frame 2 of the frame.
  • the upper push rod 31, the stay 5, the upper rear rod 21, and the lower push rod 32 constitute a first four-link mechanism, and the first four-link mechanism is moved to drive the cart frame in an unfolded state (see FIG. 1). (Shown in Fig. 10) and folded state (see Figs. 10-11).
  • the cart frame is folded, the rear end of the upper push rod 31 and the front end of the lower push rod 32 are close to each other, and the rear end of the lower push rod 32 and the rear end of the lower rear rod 22 are close to each other.
  • the stay 5 drives the first linkage mechanism 7
  • the rear frame 2 of the driving frame is switched from the extended state to the shortened position, and at the same time, the transmission rod 6 drives the second linkage mechanism 8 to drive the front frame 1 of the frame to rotate backward so that the front end of the front frame 1 is directed toward the rear frame 2
  • the rear ends are closed to collapse; on the contrary, when the first four-link mechanism is moved and the cart frame is switched from the folded state (refer to FIG. 10 to FIG. 11) to the unfolded state (refer to FIG.
  • the support rod 5 drives the first linkage mechanism 7 to drive the rear frame 2 of the frame from the shortened state to the extended state, while the transmission rod 6 drives the second linkage mechanism 8 to drive the front frame 1 of the frame to rotate forward to make the front frame of the frame.
  • the front end of 1 is far from the rear end of the rear frame rod 2 to open.
  • the telescoping of the rear frame 2 and the folding and unfolding of the front frame 1 are synchronized with the folding and unfolding of the cart frame, thereby making the folding and unfolding operation of the cart 100 convenient and simple.
  • the support bar of the trolley is rotationally connected to the lower rear bar. It can be understood that if the length of the lower rear bar is short, the connection point between the support bar and the lower rear bar is low. Insufficient force makes it difficult to achieve collapse; at the same time, the length of the brace will increase due to the lower connection point of the brace and the lower rear pole, so that after folding, the length of the brace will be higher than other parts, resulting in The overall height of the folded trolley is high.
  • the length of the lower rear rod needs to be increased so that the connection position of the support rod and the lower rear rod is located at the middle or upper position of the rear rod of the entire frame.
  • it can also prevent the length of the stay bar from being too long, but at this time, because the length of the lower rear bar is longer, the relative distance between the upper rear bar and the lower rear bar is caused.
  • the telescopic amount is small, so the height of the folded trolley can only be reduced in a small range, and the effect is not obvious.
  • the cart 100 not only the folding and unfolding operation of the cart 100 is convenient and concise, but also it is connected to the upper rear rod 21 through the support rod 5, and the connection point is relatively high.
  • the driving force is sufficient, and the length of the stay 5 is moderate, so that the length of the folded back 5 is not too long.
  • the length of the lower rear rod 22 does not need to be long, so that the length of the upper rear rod 21 can be shortened. It is long, so that the overall height of the trolley 100 can be significantly reduced after being folded, and the overall structure of the trolley 100 is more compact, which is convenient to carry and store. That is, the trolley 100 of the present invention can take into account both the folding driving force and the folding height.
  • the length of the front rod 1 of the frame can be reduced. After the trolley 100 is folded, its overall height can be further reduced, and the overall structure of the trolley 100 is more compact, which is convenient to carry and store.
  • the stroller frame when the length of the front frame 1 and the rear frame 2 of the stroller are substantially equal, the overall height of the stroller 100 after folding is lower, and the overall structure of the stroller 100 is more compact. Therefore, on the premise of ensuring that the overall structure of the trolley 100 is reasonable and coordinated, when the length of the first extension rod 4 is different, the required relative telescopic distance between the upper rear rod 21 and the lower rear rod 22 is also different.
  • the upper rear rod 21 is opposite to the lower rear rod 22.
  • the telescopic distance needs to be different, and when the relative telescopic distance of the upper rear rod 21 and the lower rear rod 22 needs to be different, by adjusting the length of the lower rear rod 22, different lengths of contraction distance can be obtained. 5
  • the rotation is connected to the upper rear rod 21, and the adjustment of the length of the lower rear rod 22 has no other effect on the realization of the entire structural function of the hand cart 100, thereby making the hand cart 100 of the present invention more versatile.
  • the orientations used by the components of the hand cart 100 when describing the structure are described in the unfolded state of the hand cart 100, and the direction of travel of the hand cart 100 is used herein as the hand cart.
  • the front side of 100 uses the backward direction of the trolley 100 as the rear side of the trolley 100, the gravity direction received by the trolley 100 as the lower side, and the direction opposite to the gravity direction as the upper side, and the left and right sides are in the above directions.
  • the left-right direction is a direction perpendicular to the up-down direction and the front-back direction.
  • the folding and unfolding of the cart frame is achieved by the above-mentioned first four-link mechanism.
  • first four-link mechanism To lock the state of the cart frame, for example, to lock the cart frame in the unfolded state, The relative positions of any two members of the first four-link mechanism are locked, so that the first four-link mechanism will constitute a triangular support structure, and the first four-link mechanism will not be movable, thereby realizing the state of the cart frame. Lock, when you need to switch the state, you can unlock the two components.
  • the push rod 3 has a locked state and a released state.
  • the locked state the push rod 32 and the upper push rod 31 cannot rotate relative to each other, and in the released state, the push rod 32 and push upward
  • the lever 31 is relatively rotatable.
  • the first four-link mechanism can be moved to drive the cart frame to switch between the unfolded state and the folded state.
  • the first four-link mechanism constitutes a triangular support. The structure locks the cart frame.
  • the trolley 100 further includes a retract button 3121.
  • the retract button 3121 is used to control the push rod 3 to switch from the locked state to the released state. 3 Switch from the locked state to the released state, so that the first four-link mechanism is movable, and the upper push rod 31 is pushed upward, and the first four-link mechanism moves accordingly to switch the cart frame to the folded state.
  • the rear end of the push rod 3 forms a handle portion 312, and the retract button 3121 is disposed on the handle portion 312, thereby facilitating manipulation.
  • the first linkage mechanism 7 includes a link 71 and a crank 72.
  • the lower end of the link 71 is rotatably connected to the lower rear rod 22, and the lower end of the crank 72 and The upper end of the connecting rod 71 is rotatably connected, and the upper end of the crank 72 is fixedly connected with the stay 5 to be driven to rotate by the stay 5.
  • the connecting rod 71, the crank 72, the upper rear lever 21 and the lower rear lever 22 constitute a crank slider mechanism.
  • the first linkage mechanism 7 has a simple structure and a stable and reliable driving process.
  • crank 72 and the stay 5 are integrally formed, and the crank 72 is formed by bending and extending the front end of the stay 5, thereby not only simplifying the production and assembly processes of the crank 72 and the stay 5, but also making the crank 72 and The connection strength between the stays 5 is high and it is not easy to break.
  • crank 72 and the stay 5 can also be separately formed, and then the crank 72 and the stay 5 are connected.
  • the crank 72 and the stay 5 can be connected by welding or bolting. The connection makes the manufacturing process of the crank 72 and the stay 5 more diversified.
  • the trolley 100 further includes a connecting member 20, which is provided at the front end of the lower rear rod 22 and is detachably connected to the lower rear rod 22.
  • the lower rear lever 22 is rotatably connected with the connecting rod 71 through the connecting member 20.
  • the upper rear rod 21 passes through the connecting member 20 and is telescopically embedded in the lower rear rod 22.
  • the connecting member 20 includes a first connecting section 201 and a second connecting section connected to each other.
  • the first connecting section 201 is exposed on the outside of the lower rear rod 22 and is rotatably connected with the link 71.
  • the second connecting section 202 is embedded in the lower rear rod 22 and is detachably connected to the lower rear rod 22.
  • one of the lower rear lever 22 and the connecting member 20 is provided with an elastic buckle 2021, and the lower rear lever 22 and the connecting member 20 are provided.
  • the other of them is provided with a latching position 222 (such as a latching hole or a latching slot) adapted to the elastic latching 2021.
  • an elastic buckle 2021 is provided on the lower rear rod 22, and a connecting position 222 adapted to the elastic buckle 2021 is provided on the connecting member 20.
  • the connecting member 20 is provided with an elastic buckle 2021
  • the lower rear rod 22 is provided with a latching position 222 adapted to the elastic buckle 2021.
  • an end of the upper rear lever 21 embedded in the lower rear lever 22 is provided with a stop block 211, and the stop block 211 may abut against the end of the second connection section 202 to The length of the upper rear rod 21 protruding out of the lower rear rod 22 is restricted, so that the upper rear rod 21 can be prevented from sliding out of the upper rear rod 21.
  • the second linkage mechanism 8 includes a first link 81 and a second link 82.
  • the front end of the first link 81 is connected to the frame front rod 1.
  • the front end of the second link 82 is rotatably connected to the rear end of the first link 81, and the rear end of the second link 82 is rotatably connected to the other ends of the upper rear lever 21 and the transmission lever 6, respectively.
  • the rear end of the two links 82 is rotatably connected to the upper rear rod 21, while the rear end of the second link 82 is rotatably connected to the other end of the transmission rod 6, and the relative rotation axis between the transmission rod 6 and the second link 82 is The relative rotation axes between the second link 82 and the upper rear lever 21 do not overlap.
  • the first link 81, the second link 82, the upper rear lever 21 and the frame front lever 1 constitute a second four-link mechanism, and the second four-link mechanism and the first four-link mechanism are linked through a transmission rod 6, When the first four-link mechanism is moved so that the cart frame is in the unfolded state shown in FIG.
  • the second four-link mechanism is moved to move the front end of the frame front rod 1 away from the frame rear rod 2. Rear end, when the first four-link mechanism moves to make the cart frame in the folded state shown in Figs. 10-11, the second four-link mechanism moves to move the front of the front rod 1 of the frame toward The rear end of the frame rear lever 2 is closed.
  • the second linkage mechanism 8 has a simple structure and a stable and reliable driving process.
  • the first four-link mechanism constitutes a triangular support structure
  • the relative positions of the second link 82 and the upper rear lever 21 are locked, so that the second four-link mechanism also constitutes a triangular support structure, so that The position of the frame front rod 1 is locked.
  • the lateral width of the front wheel assembly 9 is smaller than the lateral width of the rear wheel assembly 10.
  • the front wheel assembly 9 is along the The lateral direction is located between the rear wheel assemblies 10.
  • the front frame 1 and the rear frame 2 of the trolley 100 are arranged in pairs in the left and right directions.
  • the front wheel assembly 9 includes left front wheels 91 that are oppositely disposed in the left and right directions.
  • the left front wheel 91 is provided at the bottom of the left frame front rod 1
  • the right front wheel 92 is provided at the bottom of the right frame front rod 1
  • the rear wheel assembly 10 includes left The rear wheel 101 and the right rear wheel 102, the left rear wheel 101 is provided at the bottom of the left frame rear rod 2 and the right rear wheel 102 is provided at the bottom of the right frame rear rod 2.
  • the “lateral” described here is the left-right direction shown in FIG. 1.
  • the lateral width of the front wheel assembly 9 is the distance between the left front wheel 91 and the right front wheel 92
  • the lateral width of the rear wheel assembly 10 is the distance between the left rear wheel 101 and the right rear wheel 102.
  • the left front wheel 91 and the right The distance between the front wheels 92 is smaller than the distance between the left rear wheel 101 and the right rear wheel 102.
  • the left front wheel 91 and the right front wheel 92 are located on the left rear wheel 101 and the right rear wheel. Between 102. In this way, the structure of the trolley 100 in the folded state can be made more compact and the overall volume smaller, thereby further facilitating the carrying and storage of the trolley 100.
  • the trolley 100 further includes a seat bar 30, which is rotatably connected to the lower push rod 32 and the stay 5 respectively.
  • the seat bar 30 With the deployment and folding of the cart frame, the seat bar 30 has a switchable The unfolded state (as shown in FIG. 1 of the seat post 30 is in a substantially horizontal state) and the folded state (as shown in FIG. 10 to FIG. 11 of the seat post 30 is in a substantially vertical state).
  • the upper push rod 31, the support rod 5, the seat rod 30, and the lower push rod 32 may constitute a third four-link mechanism, and the third four-link mechanism and the first four-link mechanism share the upper push rod 31, the support rod 5 and the lower push rod 32, whereby the third four-link mechanism is linked with the first four-link mechanism, and when the first four-link mechanism is moved, the cart frame is in the unfolded state as shown in FIG.
  • the third four-link mechanism moves accordingly to make the seat bar 30 in the unfolded state as shown in FIG. 1, and when the first four-link mechanism moves to make the cart frame as shown in FIGS. 10-11
  • the third four-bar linkage mechanism moves accordingly so that the seat bar 30 is in the folded state as shown in FIGS. 1 to 11.
  • the seat bar 30 is unfolded and folded in synchronization with the unfolding and folding of the cart frame, and the folding and unfolding operation of the cart 100 is convenient and simple.
  • the third four-link mechanism also constitutes a triangular support structure, so that the position of the seat rod 30 is locked.
  • the trolley 100 further includes an armrest bar 40, which is rotatably connected to the lower push rod 32 and the stay 5 respectively.
  • the armrest bar 40 With the deployment and folding of the cart frame, the armrest bar 40 has a switchable The unfolded state (as shown in the armrest lever 40 in FIG. 1 is in a substantially horizontal state) and the folded state (as shown in the armrest lever 40 in FIG. 10 to FIG. 11 is in a substantially vertical state).
  • the upper push rod 31, the stay 5, the armrest 40, and the lower push 32 may constitute a fourth four-link mechanism, and the fourth four-link mechanism and the first four-link mechanism share the upper push rod 31, the stay 5 and the lower push rod 32, so that the fourth four-link mechanism is linked with the first four-link mechanism, and when the first four-link mechanism is moved, the cart frame is in the unfolded state as shown in FIG.
  • the fourth four-link mechanism moves accordingly to make the handrail 40 in the unfolded state as shown in FIG. 1, and when the first four-link mechanism moves to make the cart frame as shown in FIGS. 10-11 In the folded state, the fourth four-link mechanism moves accordingly, so that the armrest bar 40 is in the folded state as shown in FIGS. 10-11.
  • the handrail bar 40 is unfolded and folded in synchronization with the unfolding and folding of the cart frame, and the folding and unfolding operation of the cart 100 is convenient and simple.
  • the fourth four-link mechanism when the first four-link mechanism constitutes a triangular support structure, the fourth four-link mechanism also constitutes a triangular support structure, so that the position of the armrest lever 40 is locked.
  • a locking member 221 is provided on the lower rear lever 22, and a locking member 311 is provided on the upper push rod 31.
  • the locking member 221 can cooperate with the locking member 311 to lock the trolley 100 in a folded state.
  • the structure of the cart 100 in the folded state is more stable, and the cart 100 will not be unfolded because a part of the cart 100 is pulled.
  • the unlocking member 221 may cooperate with the locking member 311.
  • the trolley 100 further includes a second extension rod (not shown), the second extension rod extends obliquely from front to back, and the front end of the second extension rod is opposite to the front end of the upper rear rod 21 Fixedly connected, the rear end of the second extension rod is rotationally connected to the front end of the lower push rod 32.
  • the second extension rod and the lower push rod 32 are substantially on a straight line.
  • the "first" or “under” of the second feature may include direct contact between the first and second features, and may also include the first and second features.
  • the second feature is not a direct contact but a contact through another feature between them.
  • the first feature is “above”, “above”, and “above” the second feature, including that the first feature is directly above and obliquely above the second feature, or merely indicates that the first feature is higher in level than the second feature.
  • the first feature is “below”, “below”, and “below” of the second feature, including the fact that the first feature is directly below and obliquely below the second feature, or merely indicates that the first feature is less horizontal than the second feature.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Handcart (AREA)
  • Carriages For Children, Sleds, And Other Hand-Operated Vehicles (AREA)

Abstract

L'invention concerne un chariot (100), comprenant un cadre de chariot, un ensemble roue avant (9) et un ensemble roue arrière (10). Le cadre de chariot comprend : une tige avant de cadre (1) ; une tige arrière de cadre (2) ; une tige de poussée (3) ; une première tige d'extension (4) ; une tige de support (5), l'extrémité avant de la tige de support (5) étant reliée rotative à une tige arrière supérieure (21), et l'extrémité arrière étant reliée rotative à une tige de poussée supérieure (31) ; un premier mécanisme de liaison (7) disposé entre l'extrémité avant de la tige de support (5) et une tige arrière inférieure (22) ; une tige de transmission (6), une extrémité de la tige de transmission (6) étant reliée rotative à une tige de poussée inférieure (32) ; et un second mécanisme de liaison (8), l'extrémité avant du second mécanisme de liaison (8) étant reliée rotative à la tige avant de cadre (1), et l'extrémité arrière étant reliée à l'autre extrémité de la tige de transmission (6) et à la tige arrière supérieure (21), respectivement.
PCT/CN2019/100167 2018-08-14 2019-08-12 Chariot WO2020034915A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810922252.8A CN110271594B (zh) 2018-08-14 2018-08-14 手推车
CN201810922252.8 2018-08-14

Publications (1)

Publication Number Publication Date
WO2020034915A1 true WO2020034915A1 (fr) 2020-02-20

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PCT/CN2019/100167 WO2020034915A1 (fr) 2018-08-14 2019-08-12 Chariot

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WO (1) WO2020034915A1 (fr)

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