WO2016015652A1 - 手推车 - Google Patents

手推车 Download PDF

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Publication number
WO2016015652A1
WO2016015652A1 PCT/CN2015/085509 CN2015085509W WO2016015652A1 WO 2016015652 A1 WO2016015652 A1 WO 2016015652A1 CN 2015085509 W CN2015085509 W CN 2015085509W WO 2016015652 A1 WO2016015652 A1 WO 2016015652A1
Authority
WO
WIPO (PCT)
Prior art keywords
frame
wheel
cart
positioning
trolley
Prior art date
Application number
PCT/CN2015/085509
Other languages
English (en)
French (fr)
Inventor
吉绍山
陈国军
齐献山
Original Assignee
苏州宝时得电动工具有限公司
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
Priority claimed from CN201410366180.5A external-priority patent/CN105329268A/zh
Priority claimed from CN201410479259.9A external-priority patent/CN105480265A/zh
Priority claimed from CN201520535180.3U external-priority patent/CN205034143U/zh
Application filed by 苏州宝时得电动工具有限公司 filed Critical 苏州宝时得电动工具有限公司
Publication of WO2016015652A1 publication Critical patent/WO2016015652A1/zh

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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
    • B62B1/00—Hand carts having only one axis carrying one or more transport wheels; Equipment therefor
    • B62B1/18—Hand carts having only one axis carrying one or more transport wheels; Equipment therefor in which the load is disposed between the wheel axis and the handles, e.g. wheelbarrows
    • B62B1/20—Hand carts having only one axis carrying one or more transport wheels; Equipment therefor in which the load is disposed between the wheel axis and the handles, e.g. wheelbarrows involving parts being collapsible, attachable, detachable or convertible

Definitions

  • the present invention relates to a transportation vehicle, and more particularly to a trolley.
  • Trolleys are a type of transportation that is often used in the construction and living areas.
  • Conventional carts have both push-pull and stand-up modes that can be switched between the two modes to facilitate loading, unloading, and storage of the cart itself.
  • the trolley includes a wheel movably disposed at one end of the frame and a support leg movably disposed on the frame.
  • the wheel When the trolley is in a flat push state, the wheel is located away from the frame, and the support leg is opened, and the switch needs to be established.
  • you need to erect the frame first then first gather the support legs and then operate the wheels to get close to the frame.
  • you switch from the vertical push state to the flat push state you need to open the support leg first, then operate the wheel away from the frame, and finally level the erected frame.
  • Such a trolley is complicated to operate in the process of switching between the push and push modes, and is inconvenient to use.
  • the conventional trolley is provided with support legs that can be folded or opened relative to the frame, and when the support legs are opened, the frame of the trolley can be supported together with the wheels to maintain the horizontal state. When it is desired to push, push or store the trolley, the support legs can be folded over the frame.
  • the support legs of the trolley need to be easily positioned when opened, and at the same time it is also very convenient to dislocate the support legs.
  • Some trolleys lack a positioning mechanism on the support legs and are inconvenient to use.
  • the supporting legs are linked with the wheels, and the movement of the supporting legs drives the wheels to move, thereby enabling the conversion of the two modes of flat push and vertical push, which in turn enables the support legs to remain open or folded.
  • this solution for keeping the support legs folded or opened is relatively complicated.
  • a trolley that can be adapted to both flat push and stand up modes by adjusting the wheel position.
  • One way to adjust the position of the wheel is by means of a movement on the frame that can be folded or opened relative to the frame.
  • the frame of the trolley can be supported together with the wheel to keep it horizontal.
  • the support legs can be gathered on the frame.
  • the wheels can be moved forward and backward by the transmission rod, thereby adjusting the wheel position.
  • this way of changing the position of the wheel requires setting up A relatively complicated linkage mechanism such as a leg and a transmission rod.
  • a trolley comprising a longitudinally extending frame; a wheel movably coupled to the bottom of the frame, operatively at an end away from the frame Switching between a first position and a second position adjacent the end of the frame; a support leg movably coupled to the frame, operatively switchable between a stowed position and an open position; the cart having a flat Pushing and tilting two modes, when the trolley is in the push mode, the wheel is in the first position, the support leg is in the open position; when the trolley is in the oblique push mode, a wheel in the second position, the support leg being in the stowed position, the wheel being capable of supporting the cart together with an end of the frame, the wheel supporting the end of the frame
  • the frame forms an angle with a direction perpendicular to the ground; the cart further includes a transmission rod connecting the wheel and the support leg such that the wheel and the support leg simultaneously perform positional switching.
  • the angle of the included angle ranges from 10 to 30 degrees.
  • the angle of the included angle ranges from 10 to 20 degrees.
  • the angle of the included angle ranges from 15 to 20 degrees.
  • a projection of a center of gravity of the trolley on the ground is located at a location of the wheel and the vehicle The end of the rack is located between the locations.
  • the cart further includes a locking structure operative to lock the cart in the push mode or the recline mode.
  • the locking structure is disposed between the support leg and the frame.
  • the locking structure comprises a guiding member disposed on the frame, the guiding member is spaced apart from two positioning holes, and the locking structure further comprises a limiting member disposed on the supporting leg, A stop member moves along the guide member and optionally mates with either of the two positioning holes.
  • the line between the two positioning holes is curved.
  • the support leg is pivotally disposed on the frame.
  • the wheel is coupled to the frame by a fixed plate, and the fixed plate is pivotally disposed on the frame.
  • the wheel is coupled to the frame by a fixed plate, and the fixed plate is pivotally disposed on the frame.
  • the wheel is rotatably mounted to the axle, and the axle is fixed to the fixed plate.
  • the transmission rod is connected to the support leg at one end and to the fixed plate at one end.
  • the fixing plate is provided with a limiting post for abutting the supporting frame.
  • the limiting post is provided with two, which can abut the different positions of the support frame.
  • the cart further includes a handle provided at one end of the frame, the handle being curved toward a side of the wheel.
  • the wheel is provided with a pair, respectively located on both sides of the frame.
  • the above-mentioned trolley has a transmission rod connecting the wheel and the supporting leg, so that when the working mode of the trolley is switched, only one state of the wheel or the supporting leg can be changed, so that the state of the other of the wheel or the supporting leg can occur simultaneously.
  • the change simplifies the operation and makes the use of the trolley more convenient.
  • Another object of the present invention is to provide a cart that can simply and reliably hold the support legs in an open or folded state.
  • a trolley including a frame and a wheel for mounting the bottom of the frame, and one end of the frame is further provided with a handle and a supporting leg, and the supporting leg can be Dynamically coupled to the frame, the support legs are switchable between folding and opening positions, the cart further including a limit for cooperating with the frame to respectively maintain the support legs in a folded and open state Bit pieces.
  • the support leg is rotatably coupled to the frame, and the support leg is rotatable between two positions of folding and opening.
  • the support legs are pluggably connected to the frame.
  • the frame is provided with a guiding member, and the guiding member is provided with two positioning holes at intervals, and the limiting member passes through the supporting legs and can respectively cooperate with the two positioning holes.
  • the guide member is curved.
  • the frame is rotatably disposed relative to the wheel, and the frame is switchable between a horizontal state and a tilted state, wherein when the frame is in a horizontal state, the support leg can be opened Cooperating with the wheel to support the frame; when the frame is in an inclined state, the wheel and the end of the frame together enable the frame to maintain a tilted state by its own gravity.
  • the wheel is fixed to a rotating shaft, and the rotating shaft is rotatably connected to the frame.
  • the wheel is immovable relative to the frame.
  • the other end of the frame away from the handle is further provided with a pallet that can be folded or opened relative to the frame, wherein the pallet can be opened when the frame is in a tilted and horizontal state. .
  • the pallet is movably connected to the frame, and the frame is provided with a guiding groove, the guiding groove includes an intermediate guiding groove and a first positioning groove and a second positioning groove at both ends, a positioning post capable of moving in the guiding slot is provided on the pallet, wherein the pallet is held in a folded state when the positioning post is located in the first positioning slot, and the positioning post is located in the second positioning When in the slot, the pallet is held in an open state.
  • the pallet comprises a carrying portion, and both sides of the carrying portion are provided with side plates, and the positioning plates are disposed on the side plates, and the guides are disposed on both sides of the frame groove.
  • the positioning post is located in the second positioning groove, the pallet is kept in an open state, and the pallet also abuts against the frame.
  • one of the two inner walls of the portion of the guiding groove between the first positioning groove and the guiding groove is formed with a first convex portion, and the other correspondingly is formed with a first concave portion;
  • One of the two inner walls of the portion between the second positioning groove and the guide groove is formed with a second convex portion, and the other is correspondingly formed with a second concave portion.
  • the pallet is rotatably coupled to the frame, and the pallet is slidable to the left and right of the frame in a direction perpendicular to a plane of rotation of the pallet, and a limited position pin is disposed on the frame a limiting slot is disposed on the pallet, the limiting slot includes a first positioning slot and a second positioning slot, and the first positioning slot and the second positioning slot are perpendicular to the plane of rotation of the tray
  • the directions are staggered and communicate with each other, and the limit pins are selectively engageable with the second positioning groove and the first positioning groove to restrict rotation of the plate or to release the restriction.
  • the trolley of the invention has a movable connection between the support leg and the frame, and the cooperation of the limiting member and the frame can be
  • the support legs are kept in a folded or open state, and it is not necessary to adopt a manner of interlocking with components such as wheels to keep the folding or opening, and the limit position is simple and reliable.
  • Another technical problem to be solved by the present invention is to provide a trolley that can easily and conveniently achieve front and rear adjustment of the wheel position without requiring a complicated linkage mechanism.
  • a trolley including a frame and a wheel, the frame having opposite front ends and rear ends, and the frame is provided in front and rear directions along the front end to the rear end thereof.
  • the two positioning portions are a first axle and a second axle that are staggered in the front-rear direction, and when the wheel is fixed to the first axle, the wheel is positioned on the frame a position; the wheel is positioned in a second position on the frame when the wheel is fixed to the second axle.
  • the wheel is plugged and connected with the first axle or the second axle and can be positioned in series by a positioning pin.
  • the positioning portion is a first positioning hole and a second positioning hole which are staggered in the front-rear direction
  • the wheel is mounted on an axle
  • the axle is fixed on a fixing plate
  • the fixing plate is The frame is rotatably connected
  • the fixing plate is further provided with a first limiting hole and a second limiting hole, wherein the first positioning hole is aligned with the first limiting hole, and the second positioning hole is When the second limiting hole is staggered, the wheel is in the first position; when the second positioning hole is aligned with the second limiting hole, and the first positioning hole is offset from the first limiting hole, The wheel is in the second position.
  • the first limiting hole and the first positioning hole can be connected by a positioning pin; the second limiting hole and the second positioning hole can be connected by a positioning pin.
  • the front end of the frame is provided with a front end bracket, and the first positioning hole and the second positioning hole are disposed on the front end bracket, and the fixing board is pivotally connected to the front end bracket.
  • the wheel and the axle are plugged and connected, and are positioned in series by a positioning pin.
  • the frame is provided with a sliding slot
  • the two positioning portions are two preset positions in the sliding slot
  • the wheel is provided with a fixing plate rotatably connected to the frame.
  • the fixing plate is limited to the two preset positions, the wheels are respectively in the first position and the second position.
  • the fixing plate is provided with a limiting post that can be slidably engaged with the sliding slot.
  • the limiting post is locked at the positioning portion by a nut.
  • the wheel can be directly connected to the corresponding positioning portion, and the complicated linkage mechanism such as the support leg and the transmission rod is not needed, which is simple and convenient.
  • Figure 1 is a schematic view of the trolley in a flat push mode.
  • FIGS. 2 and 3 are schematic views of the working state of the trolley when it is in the oblique push mode.
  • 4 and 5 are schematic views of the storage state when the trolley is in the oblique push mode.
  • Figure 6 is a schematic view showing the trolley in a flat push state in the second embodiment of the present invention, with the support legs in an open state.
  • Fig. 7 is a partial enlarged view of the cart shown in Fig. 6.
  • Figure 8 is a schematic view showing the trolley in a vertical state in the second embodiment of the present invention, the support legs being in a folded state.
  • Fig. 9 is a schematic view showing the tray of the trolley in the second embodiment of the present invention when it is opened.
  • Figure 10 is a partial enlarged view of the cart shown in Figure 9.
  • Figure 11 is a schematic view showing the folding of the pallet of the trolley in the second embodiment of the present invention.
  • Figure 12 is a schematic view showing the trolley in a flat push state in the third embodiment of the present invention, with the support legs in an open state.
  • Figure 13 is a schematic view showing the trolley in a vertical state in a third embodiment of the present invention, the support legs being in a folded state.
  • Figure 14 is a schematic view showing the folding of the pallet of the trolley in the third embodiment of the present invention.
  • Figure 15 is a partial enlarged view of the cart of Figure 14;
  • Figure 16 is a schematic view showing the tray of the trolley in the third embodiment of the present invention when it is opened.
  • Figure 17 is a schematic illustration of another angle of the cart of Figure 16;
  • Figure 18 is a partial enlarged view of the cart shown in Figure 17;
  • Figure 19 is a schematic view showing the trolley in a flat push state according to a fourth embodiment of the present invention.
  • Figure 20 is a schematic view of the trolley in a vertical state in a vertical state according to a fourth embodiment of the present invention.
  • Figure 21 is a schematic view showing the second angle of the trolley in a vertical push state according to a fourth embodiment of the present invention.
  • Figure 22 is a schematic view of the fourth embodiment of the present invention in a state in which the cart is in a vertical push state.
  • Figure 23 is a schematic view showing the state in which the trolley of the fifth embodiment of the present invention is in a flat push state.
  • Figure 24 is a schematic view showing the trolley in a vertical push state according to a fifth embodiment of the present invention.
  • Figure 25 is a schematic view of the fifth embodiment of the present invention in a state in which the cart is in a flat state.
  • Figure 26 is a schematic view of the second embodiment of the present invention in a state in which the cart is in a flat push state.
  • a cart 100 that includes a longitudinally extending frame 110, and wheels 120 that are movably coupled to the bottom of the frame 110.
  • the top of the frame 110 is open and forms a storage compartment 180 for accommodating the cargo, and is of course not limited to the cavity structure as long as it can carry cargo.
  • Wheel 120 is a walking element.
  • One end of the frame 110 is provided with a handle 112 for the user to hold.
  • one end of the handle 112 is connected to the frame 110, and the other end is a free end.
  • the handles 112 are provided with a pair and there is no connection between the free ends of the handles 112, although it is of course also possible to increase the crossbar connecting the two handles 112.
  • the handle 112 is bent toward the side where the wheel 120 is located.
  • the wheel 120 is movably coupled to the bottom of the frame 110.
  • the wheel 120 is rotatably mounted on the axle 130, the axle 130 is fixed to the bottom of the frame 110, and the axle 130 is rotatable relative to the frame 110.
  • the axle 130 is movable back and forth with respect to the frame 110.
  • the axle 130 is coupled to the frame 110 by a fixed plate 160 , and the fixed plate 160 is pivotally disposed on the frame 110 .
  • the cart 100 further includes a support frame 116 , and the support frame 116 is fixed to the frame 110 .
  • the fixing plate 160 is rotatably coupled to the support frame 116 by a pivot. Accordingly, the fixed plate 160 can be pivoted about the support frame 116 by operating the axle 130, thereby causing the wheel 120 to switch between a first position near the end of the frame 110 and a second position away from the end of the frame 110.
  • the cart 100 when the wheel 120 is in the first position away from the frame 110, the plane of the frame 110 is substantially parallel to the ground, in a substantially horizontal state, and the cart 100 is in the flat push mode. Carts in the push-pull mode are commonly used to transport bulk materials using the storage compartment 180 below the plane of the frame 110.
  • the trolley 100 in the push-pull mode has an operating state and a rest state.
  • the parking state shown in FIG. 1 is a rest state.
  • the handle 112 is raised to rotate the frame 110 upward, the trolley is changed from the rest state to the working state.
  • FIGS. 2 to 3 when the wheel 120 is operated to a second position near the end of the frame 110, the frame 110 is in an inclined state, and the frame 110 forms an angle with a direction perpendicular to the ground.
  • the trolley 100 is in an oblique push mode and is often used to support a large object by the plane of the frame 110 to achieve a diagonal push.
  • the cart 100 in the oblique push mode has an operational state and a stored state, and FIGS. 2 and 3 show an operational state in which the cart 100 only has the wheels 120 landing.
  • the wheel 120 and the end of the frame 110 collectively support the cart 100 at the same time, and the ends of the wheel 120 and the frame 110 are simultaneously landed. This will be further described later.
  • the cart 100 further includes a support leg 140 that is movably coupled to the bottom of one end of the frame 110 where the handle 112 is disposed.
  • one end of the support leg 140 is rotatably coupled to the frame 110 such that the support leg 140 is rotatable between the closed and open positions.
  • the cart 100 is in a flat push mode, the support legs 140 are open, and together with the wheels 120 support the common cart 100.
  • the open support leg 140 raises the height of the frame 110 at one end of the handle 112 such that the user can continue to raise the storage compartment 180 while the middle of the push of the trolley 100 to prevent the bulk material from rolling off the suddenly lowered storage compartment 180.
  • the wheel in the oblique push mode, the wheel is located at a second position near the end of the frame 110, and in the case where the wheel 120 is also grounded, the end of the frame 110 away from the handle 112 is compared.
  • the end of the frame 110 in the flat push mode is lower, and thus the height of the handle 112 is the same, and the frame 110 in the oblique push mode is inclined.
  • the support leg 140 continues to be open, it will touch the user's body, causing accidental injury. For this reason, when the cart 100 is cut by the flat push mode
  • the user needs to switch the support leg 140 from the open position to the collapsed position.
  • the working state of the trolley 100 in the oblique pushing mode In this state, the user lifts the handle 112 with both hands, the frame 110 is tilted, and only the wheel 120 is grounded.
  • the storage state of the trolley 100 in the oblique push mode In this state, the user lifts the handle 112 to a higher position, so that the end of the frame 110 away from the end of the handle 112 is grounded.
  • the cart 100 is supported together with the wheel 120.
  • the frame 110 forms an angle with a direction perpendicular to the ground.
  • the cart 100 occupies the smallest dimension in the length direction for easy storage.
  • the cart 100 has two working modes of flat push and oblique push.
  • the wheel 120 When the cart 100 is in the flat push mode, the wheel 120 is located at a first position away from the end of the frame 110, and the support leg 140 is in an open position, the wheel 120 The cart 100 can be supported together with the support leg 140; when the cart 100 is in the oblique push mode, the wheel 120 is in a second position near the end of the frame 110, the support leg 140 is in the stowed position, and the wheel 120 can be coupled to the end of the frame 110 The unit supports the cart 100 together.
  • it is required to convert the working mode of the cart 100 it is necessary to manually operate the wheel 120 and the supporting leg 140 to change the positions of the two, and the operation process is cumbersome and inconvenient to use.
  • the cart 100 of the present invention provides a drive rod 170 that connects the wheel 120 and the support leg 140 such that the wheel 120 and the support leg 140 are capable of simultaneous positional switching. That is to say, changing the state of the support leg 140 can simultaneously drive the wheel 120 to complete the position switch, and vice versa.
  • the cart 100 of the present invention also includes a locking structure that operatively locks the cart 100 in a push-pull mode or a recline mode.
  • the locking structure may be disposed between the wheel 120 and the frame 110, and specifically between the fixed plate 160 and the support frame 116. In the present embodiment, the locking structure is disposed between the support leg 140 and the frame 110.
  • the locking structure includes a guide member 114 disposed on the frame 110, and a limiting member 150 for engaging the guide member 114 to limit the support leg 140 is further provided.
  • the positioning member 114 is provided with two positioning holes 1142 spaced apart from each other.
  • the stop member 150 passes through the support leg 140 and selectively engages with either of the two positioning holes 1142 as the pivoting of the support leg 140 moves along the guide member 114.
  • the two positioning holes 1142 correspond to the stowed position and the open position of the support leg 140, respectively, such that the support leg 140 is held in the closed state or the open state in a simple and reliable manner.
  • the guiding member 114 has an arc shape, and the connecting line between the two positioning holes 1142 is curved.
  • the pivoting motion trajectory of the supporting leg 140 is matched, so that the guiding member 114 has a simple structure and a low cost.
  • the fixed plate 160 when the support leg 140 is opened or closed, the fixed plate 160 is rotated about the pivot point thereof by the transmission rod 170, and the fixed plate 160 can drive the wheel 120 to move back and forth relative to the frame 110 while rotating.
  • the supporting leg 140 is pivoted to a state substantially perpendicular to the frame 110 or pivoted to a state of forming an angle with the frame 110, the limiting member 150 can be inserted into the corresponding positioning hole 1142 of the guiding member 114 to complete positioning.
  • the cart 100 is maintained in a flat push or tilt push mode. As such, the cart 110 adapts the transition of the push and tilt modes by operating the support legs 140 to cause the wheels 120 to move back and forth.
  • the wheel 120 is moved and positioned in the first position or the second position by operating the axle 130, while the axle 130 drives the support leg 140 through the transmission rod 170,
  • the support legs 140 are positioned in an open or collapsed position.
  • the support leg 140 is in the open position, the cart 100 is in the flat push mode, and the position of the wheel 120 is closer to the support leg 140 than the oblique push state shown in FIG.
  • the support legs 140 move the drive transmission rod 170 toward the side of the wheel 120 such that the fixed plate 160 moves the wheel 120 away from the support legs 140 to the position of FIGS. 2 and 3.
  • the wheel 120 is closer to the end of the frame 110 away from the end of the handle 112, and is adapted to be tilted.
  • the support leg 140 and the frame 110 may also be plugged and connected, and the transmission rod 170 is still connected to the support leg 140.
  • the support leg 140 when the support leg 140 is inserted into the receiving position on the frame 110, the support leg 140 is in the collapsed state; when the support leg 140 is pulled out of the receiving position by a certain length, the support leg 140 is in an open state.
  • the supporting leg 140 can be obliquely moved in a direction perpendicular to the direction perpendicular to the ground or can be inserted and removed in a horizontal direction, so that when the supporting leg 140 is inserted or pulled out, the driving rod 170 can be driven to move.
  • the plate 160 rotates, thereby driving the wheel 120 to move back and forth.
  • the limiting member 150 is used to limit the supporting legs 140 so that the fixing plate 160 can be indirectly positioned.
  • the fixed plate 160 is further provided with a finite column 162.
  • the limit post 162 In the flat push and tilt push state, the limit post 162 abuts on different positions on the side of the support frame 116, effectively functions to limit the rotation range of the fixed plate 160 and position the fixed plate 160.
  • the different limit posts in the flat push and oblique push state, the different limit posts abut the different positions of the support frame 116, so that the rotation range of the fixed plate 160 is relatively small compared with only one limit column.
  • the adjustment range of the wheel 120 is further controlled.
  • the cart 100 is in an operating state in the oblique push mode, and the working state in the oblique push mode facilitates loading of large items on the one hand, and the length of the cart 100 in the front and rear directions in this mode is relatively long. Small, so you can make more flexible turns, especially when the road is not good.
  • the cart 100 is in a stored state in the oblique push mode.
  • the wheel 120 and one end of the frame 110 jointly support the frame 110 such that the frame 110 is perpendicular to the ground.
  • An angle ⁇ is formed between them.
  • the angle ⁇ of the angle ⁇ ranges from 10 to 30 degrees.
  • the angle ⁇ is 10 degrees
  • the length of the frame 110 in the front-rear direction is the smallest, which facilitates storage of the trolley 100 in a small space.
  • the angle ⁇ is 30 degrees
  • the height of the frame 110 in the vertical direction is the smallest. It is convenient for the user who is not tall to take the trolley 100.
  • the angle ⁇ of the angle ⁇ ranges from 10 to 20 degrees, and further, the angle ⁇ of the angle ⁇ ranges from 15 to 20 degrees.
  • the floor space of the cart 100 in the front-rear direction is small, which is convenient for storage and storage; in addition, the height of the cart 100 in the vertical direction is lower than the case where the frame 110 is perpendicular to the ground, so that the handle 112 is lower from the ground, and it is convenient for the user to operate the trolley 100 again, especially for people with relatively short stature.
  • the handle 112 is curved toward the side of the wheel 120 such that the handle 112 is closer to the ground when the cart 100 is in the stored condition.
  • the projection of the center of gravity G on the ground is located.
  • the distance between the projection of the center of gravity G on the ground to the point where the wheel 120 is located is L
  • the support force of the ground to the end of the frame 110 is F
  • the wheel 120 is provided with a pair, which are mounted on both ends of the axle 130 and are respectively located on both sides of the frame 110.
  • the fixing plate 160 that cooperates with the wheel 120 and the transmission rod 170 that is connected to the fixing plate 160 are also provided in two places. The two wheels 120 make the trolley 100 more load-bearing and make the movement more stable.
  • the second embodiment discloses a trolley 200 including a frame 210 and wheels 220 mounted on the bottom of the frame 210 .
  • the top of the frame 210 is open and forms a cavity for accommodating the cargo, and is of course not limited to the cavity structure as long as it can carry the cargo.
  • Wheel 220 is a walking element.
  • One end of the frame 210 is provided with a handle 212 for the user to hold.
  • the handle 212 is provided with a pair, and there is no connection between the free ends of the handle 212.
  • the crossbar connecting the two handles can also be added.
  • the wheel 220 is rotatably mounted to the bottom of the frame 210 via the rotating shaft 230.
  • the wheel 220 is fixed to the rotating shaft 230.
  • the rotating shaft 230 is rotatably mounted on the frame 210.
  • the frame 210 is provided with one end of the handle 212 and a support leg 240 mounted on the bottom of the frame 210.
  • one end of the support leg 240 is rotatably coupled to the frame 210 such that the support leg 240 is rotatable between the folded and open positions.
  • the support leg 240 supports the frame 210 together with the wheel 220, so that when the frame 210 can be maintained in a horizontal state, the cargo placed in the frame 210 does not fall out.
  • Figures 9 and 11 after the support legs 240 are folded, the user can push the cart 200 to advance it.
  • the frame 210 can be rotated to an inclined state with respect to the wheel 220, so that the cart 200 is in a vertical push state.
  • the push-up state facilitates the loading of heavy objects on the one hand, and the small cart 200 in the vertical push state has a small length in the front-rear direction, so that a more flexible turn can be made, especially when the road conditions are not good.
  • the push-up state reduces the footprint of the cart 200 for storage.
  • the wheel 220 is only rotatable relative to the frame 210 and cannot move back and forth.
  • the cart 200 supports the frame by the wheels 220 and the ends of the frame 210, so that the frame 210 is kept inclined, so that the trolley 200 maintains the upright state.
  • the conversion from the flat push to the vertical push is very convenient, and it is only necessary to lift the handle 212 upward to change the frame 210 from the horizontal state to the tilt state.
  • the support legs 240 are required to be reliably folded on the frame 210; and when the cart 200 is laid flat on the ground, the support legs 240 are required to be reliably kept open.
  • a guide member 214 is fixed on the frame 210, and a limiting member 250 for engaging with the guiding member 214 to limit the supporting leg 240 is further provided.
  • Two positioning holes 2142 are disposed on the guiding member 214 at intervals.
  • the limiting member 250 has the supporting legs 240 and can respectively cooperate with the two positioning holes 2142.
  • the two positioning holes 2142 respectively correspond to the folded position and the open position of the support leg 240, so that the support leg 240 does not need to be held in the folded state or the open state by a simple and reliable manner by means of the linkage mechanism, the wheel 220 or the like.
  • the guiding member 214 has an arc shape, and the connecting line between the two positioning holes 2142 is curved, which coincides with the rotation trajectory of the supporting leg 240, so that the guiding member 214 has a simple structure and a low cost.
  • the guiding member 214 is mounted on the frame 210 as an accessory of the frame 210, and the purpose thereof is to adapt to the contour requirement of the bottom of the frame 210, so it can be understood that the guiding member 214 is not necessary.
  • the limiting member 250 can cooperate with the frame 210 to enable the supporting leg 240 to be held in the folded state or the open state by the limiting member 250.
  • the other end of the frame 210 away from the handle 212 is also connected with a pallet 260 that can be folded or opened relative to the frame 210.
  • the pallet 260 is in an open state and is used to support the cargo.
  • the cart 200 needs to be stored, the pallet 260 can be folded over the frame 210.
  • the frame 210 is provided with a guiding groove 216 , wherein the guiding groove 216 includes an intermediate guiding groove 2162 and a first positioning groove 2163 and a second positioning groove 2164 at both ends.
  • the pallet 260 is movably coupled to the frame 210, and the pallet 260 is provided with a positioning post 262 received in the guide slot 216 and movable in the guide slot 216.
  • the tray 260 is held in a folded state.
  • the positioning post 262 is located in the second positioning groove 2164, the tray 260 is maintained in an open state.
  • one of the two inner walls of the portion of the guiding groove 216 between the first positioning groove 2163 and the guiding groove 2162 is formed with a first convex portion 2166, and the other corresponding to the first concave portion is formed. 2167.
  • the first convex portion 2166 prevents the positioning post 262 from easily entering the guiding groove 2162, while the positioning post 262 can be operated and then passed through the first recess portion 2167.
  • a recess 2167 enters the guide groove 2162.
  • the positioning post 262 When located in the second positioning groove 2164, the second boss 2168 prevents the positioning post 262 from easily entering the guiding groove 2162, while the positioning post 262 can be operated and then enters through the second recess 2169 due to the presence of the second recess 2169 Guided in slot 2162.
  • the pallets 260 can be positioned in the two positioning slots, respectively, to be held in a folded or open state, respectively.
  • the pallet 260 includes a carrier portion 264 for supporting the cargo in an open state and a side panel 266 extending from the side of the carrier portion 264.
  • the aforementioned positioning post 262 is disposed on the side panel 266 such that the positioning post 262 can be conveniently inserted into the guide slot 216 from the side of the frame 210.
  • the side plates 266 are disposed on both sides of the bearing portion 264, so that the positioning posts 262 on the two side plates 266 are respectively inserted into the corresponding guiding slots 216 from both sides of the frame 210.
  • the pallet 260 when the cart 200 is pushed flat, the pallet 260 is typically folded to reduce the height. In some cases, when the push is pushed, the pallet 260 is also opened to block and support the cargo. Therefore, in this embodiment, the positioning post 262 is located in the second positioning groove 2164, and when the pallet 260 is kept in the open state, the pallet 260 also abuts against the frame 210 at the same time, please refer to FIG. Thus, the pressure from the cargo acts on the frame 210 through the pallet 260, rather than merely relying on the interaction of the positioning post 262 with the second positioning slot 2164 to better ensure that the pallet 260 can function.
  • the above-mentioned trolley 200 is very convenient to realize the conversion of the flat push and the vertical push mode, and only needs to lift the handle 212 to rotate the frame 210 around the rotating shaft 230.
  • the transition between the folded and open states of the support legs 240 is achieved by rotating the support legs 240.
  • the positioning of the support legs 240 is achieved by the limiting member 250, which is simple and reliable, and can quickly achieve the purpose of supporting the frame 210, and
  • the support legs 240 are quickly folded to avoid affecting the advancement of the cart 200.
  • the setting of the pallet 260 also increases the bearing capacity of the trolley 200 in the flat push and vertical push states, and the folding and opening of the pallet 260 only needs a simple pulling action, and the structure is simple and the operation is convenient.
  • the support leg 240 and the frame 210 may also be plug-in connections. At this time, similarly, the support leg 240 may be held in a folded or open state by using the limiting member 250.
  • the trolley 300 of the third embodiment includes a frame 310 and wheels 320 .
  • One end of the frame 310 is provided with a handle 312, a support leg 340 and a limiting member 350 for limiting the position of the support leg 340.
  • the other end of the frame 310 is provided with a pallet 360.
  • the trolley 300 of the third embodiment has a frame 310, a wheel 320, a handle 312, a support leg 340, and The limiting member 350 is identical to the first embodiment.
  • the way in which the two implement the flat push and the push mode conversion is the same, and will not be described again.
  • the difference between the two is that the pallets are connected differently on the frame 310, and the manner in which the pallets 360 are folded and opened is different.
  • the pallet 360 is rotatably coupled to the frame 310 , and the pallet 360 is slidable relative to the frame 310 in a direction perpendicular to the plane of rotation of the pallet 360 , that is, as shown in FIG. 9 to 11 show that the pallet 360 can slide left and right.
  • Two limit pins 314 are disposed on the frame 310 at intervals.
  • Two limiting slots 362 are correspondingly arranged on the pallet 360.
  • the limiting slot 362 includes a first positioning slot 3622 and a second positioning slot 3624.
  • the first positioning slot 3622 and the second positioning slot 3624 are perpendicular to the plane of rotation of the aforementioned bracket 360. Staggered and connected to each other.
  • the limit pin 314 is selectively engageable with the second locating slot 3624 and the first locating slot 3622 to limit rotation or release of the tab 360.
  • the tray 360 is in a folded state, and the limit pin 314 is located in the second positioning groove 3624.
  • the tray 360 is first moved relative to the frame 310, and the limiting pin 314 is disengaged from the second positioning groove 3624 and enters the first positioning groove 3622. Then turn the pallet 360 to the open state.
  • the pallet 360 is moved relative to the frame 310, so that the limiting pin 314 enters the second positioning slot 3624 from the first positioning slot 3622, and the second positioning slot 3624 is
  • the limit pin 314 acts and limits the rotation of the pallet 360. It can be understood that only one limiting slot 362 and the limiting pin 314 can be disposed on one side of the frame 310 to ensure that the frame 310 and the bracket 360 can rotate and slide relative to each other.
  • the above-mentioned trolley 300 is very convenient to realize the conversion of the flat push and the vertical push mode, and only the handle 312 needs to be raised to rotate the frame 310.
  • the transition between the folded and open states of the support leg 340 is achieved by rotating the support leg 340.
  • the positioning of the support leg 340 is achieved by a limiting member 350, which is simple and reliable, and can quickly achieve the purpose of supporting the frame 310.
  • the support legs 340 are quickly folded to avoid affecting the advancement of the cart 300.
  • the setting of the pallet 360 also increases the bearing capacity of the trolley 300 in the flat push and the vertical push state, and the folding and opening of the pallet 360 only needs a simple flipping action, and the structure is simple and the operation is convenient.
  • Embodiment 4 discloses a trolley 400 including a frame 410 and wheels 420.
  • the top of the frame 410 is open and forms a cavity for accommodating the cargo, of course not limited to the cavity knot Construction, as long as it can carry goods.
  • Wheel 420 is a walking element.
  • the frame 410 has opposite front and rear ends with a handle 412 mounted at the front end.
  • Two positioning portions are provided on the frame 410 near the rear end. The two positioning portions are staggered in the front-rear direction of the front end to the rear end.
  • the wheels 420 are respectively fixed at the two positioning portions, the wheels 420 are positioned at the first and second different positions on the frame 410. In this way, the purpose of adjusting the position of the wheel 420 at the frame 410 is achieved. More details are described below.
  • the two positioning portions are a first axle 430 and a second axle 440 that are fixed to the frame 410.
  • the cart 400 is in a flat push state, at which time the wheel 420 is fixed to the first axle 430, the wheel 420 is closer to the front end of the frame 410 (i.e., the end where the handle 412 is located), and the wheel 420 is in the first position.
  • the wheel 420 is fixed to the second axle 440, and the wheel 420 is closer to the rear end of the frame 410 (the end away from the handle) in the second position.
  • the wheel 420 is detachably fixedly coupled to the first axle 430 or the second axle 440.
  • the wheel 420 and the first axle 430 or the second axle 440 may be plugged and connected, and then positioned in series by the positioning pin to fix the wheel 420 on the first axle 430 or the second axle 440.
  • This is a convenient way to replace the wheel 420.
  • it is only necessary to remove the positioning pin, then pull the wheel 420 from the first axle 430 or the second axle 440, and then insert the connection of the wheel 420 on the other axle. .
  • the positioning portion is directly disposed on the frame 410.
  • the wheels 420 are respectively fixed at the two positioning portions, the wheels 420 are respectively positioned at the first position on the frame 410 (corresponding to the flat push) and The second position (corresponding to the vertical push).
  • the adjustment and positioning of the wheel 420 position does not require a complicated transmission mechanism, which is simple and convenient.
  • a fifth embodiment discloses a cart 500 that includes a frame 510 and wheels 520. Similar to the fourth embodiment, the frame 510 is provided with two positioning portions along the front and rear directions thereof. When the wheels 520 are fixedly coupled to the two positioning portions, respectively, the wheels 520 are positioned at the first and second different positions on the frame 510. Thus, the position of the wheel 520 on the frame 510 is adjusted.
  • the front end of the frame 510 is further provided with a front end bracket 514 for mounting an attachment.
  • the positioning portion on the frame 510 is a first positioning hole 516 and a second positioning hole 518 which are disposed on the front end bracket 514 in the front-rear direction of the frame 510.
  • the wheel 520 is rotatably mounted on the axle 530. Specifically, the connection portion of the wheel 520 and the axle 530 are plugged and connected, and then connected in series by a positioning pin to facilitate the removal and replacement of the wheel 520.
  • the axle 530 passes through the fixed plate 540.
  • the fixing plate 540 is rotatably coupled to the front end bracket 514 by a pivot 546.
  • the wheel 520 is rotatably coupled to the fixed plate 540 by the axle 530.
  • the wheel 520 is fixed to the two positioning holes by the fixing plate 540.
  • the fixing plate 540 is provided with a first limiting hole 542 and a second limiting hole 544.
  • the driving wheel 520 is also rotated about the pivot point of the fixing plate 540.
  • the position of the wheel 520 in the front-rear direction of the frame 510 can be changed.
  • the first limiting hole 542 can move to a position aligned with the first positioning hole 516
  • the second limiting hole 544 can also move to a position aligned with the second positioning hole 518, but Two alignments do not occur at the same time.
  • the cart 500 is in a flat push state.
  • the first limiting hole 542 is aligned with the first positioning hole 516, and the second limiting hole 544 and the second positioning hole are aligned. 518 staggered.
  • the wheel 520 is closest to the front end of the frame 510 in the front-rear direction.
  • the positioning pin is used to pass through the first limiting hole 542 and the first positioning hole 516, even if the position of the fixing plate 540 is fixed, thereby fixing the wheel 520 to the first position.
  • the trolley 500 when the trolley 500 is switched from the flat push state to the vertical push state, only the positioning pin needs to be removed, so that the first limiting hole 542 and the first positioning hole 516 can be disengaged from alignment, and then the fixing plate is fixed.
  • the 540 is rotated until the second limiting hole 544 is aligned with the second positioning hole 518. At this time, the first limiting hole 542 and the first positioning hole 516 are offset.
  • the wheel 520 rotates accordingly.
  • the wheel 520 moves to the second position, which is closer to the frame 510 than the first position.
  • the frame 510 can be tilted as much as possible under the support of the wheel 520 after standing up, and does not cause the front end of the frame 510 to hit the ground, so that it can be adapted to the vertical push.
  • the positioning pin passes through the second limiting hole 544 and the second positioning hole 518, the position of the fixing plate 540 is fixed, thereby fixing the wheel 520 to the second position.
  • the wheels 520 can be respectively positioned at the first position (corresponding to the flat push) and the second position (corresponding to the vertical push)
  • the adjustment and positioning of the wheel 520 position does not require a complicated transmission mechanism, which is simple and convenient.
  • the two positions on the front end bracket 514 The holes can also be joined together to form a chute.
  • Two preset positions of the chute can be selected as the positioning portion, for example, two positions at the two ends of the chute.
  • the fixing plate 540 can be provided with a limiting post that can be slidably engaged with the sliding slot.
  • the limit post can be locked by the nut at the end of the chute so that the wheel 520 can be constrained to the first position or the second position.
  • the present invention is not limited to the specific embodiment structures, and the structures based on the inventive concept are all within the scope of the present invention.

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Abstract

一种手推车，包括车架（110）、车轮（420）和支撑腿（140）；车轮活动地连接于车架的底部，可操作地在第一位置和第二位置间切换；支撑腿活动地连接于车架，可操作地在收拢位置和打开位置之间切换；当手推车在平推模式时，车轮位于第一位置，支撑腿位于打开位置；当手推车在斜推模式时，车轮位于第二位置，支撑腿位于收拢位置，车轮能够与车架的端部共同支撑手推车，此时车架与垂直于地面的方向形成夹角；手推车还包括连接车轮和支撑腿的传动杆（170），使得车轮和支撑腿同时完成位置切换。

Description

手推车 技术领域
本发明涉及一种运输工具，特别是涉及一种手推车。
背景技术
手推车是建筑、生活领域中经常要使用到的一种运输工具。传统的手推车具有平推和立推两种模式，其能够在两种模式之间转换，以便于货物的装载、卸下以及手推车自身的收纳储藏。
此类手推车包括活动地设于车架一端的车轮和活动地设于车架的支撑腿，当手推车处于平推状态时，车轮位于远离车架的位置，支撑腿呈打开状态，而需要切换成立推模式时，需要先将车架竖立起来，然后先收拢支撑腿，再操作车轮使其靠近车架。反之，如果从立推状态切换到平推状态，需要先打开支撑腿，再操作车轮使其远离车架，最后将竖立的车架放平。这样的手推车在切换平推和立推模式的过程中操作比较复杂，不方便使用。
另外，传统的手推车设置有可以相对车架折叠或打开的支撑腿，该支撑腿打开时可以与车轮一起将手推车的车架支撑，使其保持水平状态。当需要平推、立推或者收纳手推车时，支撑腿可以折叠在车架上。
手推车的支撑腿在打开时需要能方便地定位，同时又要求解除定位也非常方便以便将支撑腿折叠。有些手推车的支撑腿缺少定位机构，使用不便。有些手推车，则是支撑腿与车轮联动，通过支撑腿的活动带动车轮移动，并由此能够实现平推和立推两种模式的转换，反过来也使支撑腿能够保持在打开或折叠的状态，但是这种使支撑腿保持折叠或打开的方案相对比较复杂。
也有一种手推车，可以通过车轮位置的调节，来适应平推和立推两种模式的转换。而其车轮位置的调节的一种方式则是通过设置在车架上的可以相对车架收拢或打开支撑腿的运动来实现的。支撑腿打开时可以与车轮一起将手推车的车架支撑，使其保持水平状态。当需要平推、立推或者收纳手推车时，支撑腿可以收拢在车架上。支撑腿打开或收拢时均能够通过传动杆带动车轮前后移动，从而实现车轮位置的调整。但是，这种改变车轮位置的方式，需要设置支 撑腿、传动杆等相对复杂的联动机构。
发明内容
基于此，有必要提供一种改进的手推车，使得手推车在切换工作模式时操作更加简单，使用更为方便。
为实现上述目的，本发明所采用的技术方案是：一种手推车，包括纵向延伸的车架；车轮，活动地连接于所述车架的底部，可操作地在离开所述车架的端部的第一位置和靠近所述车架的端部的第二位置间切换；支撑腿，活动地连接于所述车架，可操作地在收拢位置和打开位置之间切换；所述手推车具有平推和斜推两种模式，当所述手推车在平推模式时，所述车轮位于所述第一位置，所述支撑腿位于所述打开位置；当所述手推车在斜推模式时，所述车轮位于所述第二位置，所述支撑腿位于所述收拢位置，所述车轮能够与所述车架的端部共同支撑所述手推车，当所述车轮与所述车架的端部共同支撑所述手推车时，所述车架与垂直于地面的方向形成夹角；所述手推车还包括连接车轮和支撑腿的传动杆，使得所述车轮和所述支撑腿同时完成位置切换。
优选地，所述夹角的角度范围为10～30度。
优选地，所述夹角的角度范围为10～20度。
优选地，所述夹角的角度范围为15～20度。
优选地，在所述斜推模式中，当所述车轮与所述车架的端部共同支撑所述手推车时，所述手推车的重心在地面的投影位于所述车轮的着地点与所述车架的端部的着地点之间。
优选地，所述手推车还包括锁定结构，所述锁定结构可操作地将所述手推车锁定在所述平推模式或斜推模式。
优选地，所述锁定结构设于所述支撑腿和所述车架之间。
优选地，所述锁定结构包括设于车架上的导向件，所述导向件上间隔设置有两处定位孔，所述锁定结构还包括设于所述支撑腿上的限位件，所述限位件沿所述导向件移动并可选择地与所述两处定位孔的任一个相配合。
优选地，所述两处定位孔之间的连线呈弧形。
优选地，所述支撑腿可枢转地设于所述车架上。
优选地，所述车轮通过固定板连接于所述车架，所述固定板可枢转地设于所述车架。
优选地，所述车轮通过固定板连接于所述车架，所述固定板可枢转地设于所述车架。
优选地，所述车轮转动安装于车轴，所述车轴固定于所述固定板。
优选地，所述传动杆一端连接于所述支撑腿，一端连接于所述固定板。
优选地，所述固定板上设有用以抵接所述支撑架的限位柱。
优选地，所述限位柱设置有两个，能够与支撑架的不同位置相抵接。
优选地，所述手推车还包括设于车架一端的把手，所述把手朝向所述车轮所在一侧弯曲。
优选地，所述车轮设有一对，分别位于所述车架两侧。
上述手推车，由于有连接车轮和支撑腿的传动杆，使得在切换手推车的工作模式时，只需改变车轮或支撑腿其中一个的状态，就能使车轮或支撑腿的其中另一个的状态同时发生变化，因而简化了操作过程，使手推车的使用更加方便。
本发明的另一目的是提供一种手推车，其能简单可靠地使支撑腿保持在打开或折叠的状态。
为实现上述目的，本发明所采用的技术方案是：一种手推车，包括车架、安装所述车架底部的车轮，所述车架的一端还设置有把手及支撑腿，所述支撑腿可动连接于所述车架，所述支撑腿能在折叠和打开两个位置之间转换，所述手推车还包括与所述车架配合以分别将所述支撑腿保持在折叠和打开状态的限位件。
优选地，所述支撑腿转动连接于所述车架，所述支撑腿能在折叠和打开两个位置之间转动。
优选地，所述支撑腿与所述车架插拔式连接。
优选地，所述车架上设有导向件，所述导向件上间隔设置有两处定位孔，所述限位件穿过所述支撑腿且能分别与所述两处定位孔相配合。
优选地，所述导向件呈弧形。
优选地，所述车架相对于所述车轮可转动设置，所述车架能在水平和倾斜两个状态之间转换，其中，所述车架处于水平状态时，所述支撑腿打开时能与所述车轮共同支撑所述车架；所述车架处于倾斜状态时，所述车轮与所述车架的端部共同使所述车架依靠自身重力保持倾斜状态。
优选地，所述车轮固定于转轴上，所述转轴与所述车架转动连接。
优选地，所述车轮相对于所述车架不能移动。
优选地，所述车架远离所述把手的另一端还设置有能相对于所述车架折叠或打开的托板，其中所述车架处于倾斜和水平状态时，所述托板能够被打开。
优选地，所述托板可动连接于所述车架，所述车架上设置有导槽，所述导槽包括中间的导向槽及两端的第一定位槽和第二定位槽，所述托板上设有能够在所述导槽中移动的定位柱，所述定位柱位于所述第一定位槽中时，所述托板被保持在折叠状态，所述定位柱位于所述第二定位槽中时，所述托板被保持在打开状态。
优选地，所述托板包括承载部，所述承载部的两侧均设置有侧板，所述侧板上均设置有所述定位柱，所述车架的两侧均设置有所述导槽。
优选地，所述定位柱位于所述第二定位槽中，所述托板被保持在打开状态，所述托板同时还抵靠于所述车架。
优选地，所述导槽位于第一定位槽与所述导向槽之间的部分的两个内壁中的一个形成有第一凸起部，另一个对应形成有第一凹陷部；所述导槽位于第二定位槽与所述导向槽之间的部分的两个内壁中的一个形成有第二凸起部，另一个对应形成有第二凹陷部。
优选地，所述托板转动连接于所述车架，且所述托板能够沿垂直于所述托板转动平面的方向相对于所述车架左右滑动，所述车架上设置有限位销，所述托板上设置有限位槽，所述限位槽包括第一定位槽和第二定位槽，且所述第一定位槽和第二定位槽在所述垂直于所述托板转动平面的方向上错开且彼此连通，所述限位销可选择地与所述第二定位槽和第一定位槽配合以限制所述托板转动或解除所述限制。
本发明的手推车，支撑腿与车架可动连接，通过限位件与车架的配合，可 将支撑腿保持在折叠或打开状态，不需要采取与车轮等元件联动的方式来保持折叠或打开，限位方式简单可靠。
本发明所要解决的另一技术问题是提供一种手推车，其能简单方便地实现车轮位置的前后调整而不需要复杂的联动机构。
为实现上述目的，本发明所采用的技术方案是：一种手推车，包括车架、车轮，所述车架具有相对的前端和后端，所述车架上沿其前端至后端的前后方向设有两处定位部，所述车轮与所述两处定位部之间能分别相固定连接，所述车轮能选择地与所述两处定位部中的任一个实现连接，当所述车轮与不同的定位部连接时，所述车轮分别被定位在车架上的第一、第二两个不同位置。
优选地，所述两处定位部为在所述前后方向上错开设置的第一车轴和第二车轴，所述车轮固定于所述第一车轴时，所述车轮被定位在车架上的第一位置；所述车轮固定于所述第二车轴时，所述车轮被定位在车架上的第二位置。
优选地，所述车轮与所述第一车轴或第二车轴之间为插拔式连接，且能通过定位销串联定位。
优选地，所述定位部为在所述前后方向上错开设置的第一定位孔和第二定位孔，所述车轮安装在车轴上，所述车轴固定在固定板上，所述固定板与所述车架转动连接，所述固定板上还设有第一限位孔和第二限位孔，其中，所述第一定位孔与第一限位孔对准、所述第二定位孔与第二限位孔错开时，所述车轮处于所述第一位置；所述第二定位孔与第二限位孔对准、所述第一定位孔与第一限位孔错开时，所述车轮处于所述第二位置。
优选地，所述第一限位孔与所述第一定位孔之间能通过定位销连接；所述第二限位孔与所述第二定位孔之间能通过定位销连接。
优选地，所述车架的前端设有前端支架，所述第一定位孔和第二定位孔设置在所述前端支架上，所述固定板通过枢轴转动连接于所述前端支架。
优选地，所述车轮与所述车轴之间为插拔式连接，并通过定位销串联定位。
优选地，所述车架上开设有滑槽，所述两处定位部为所述滑槽中的两个预设位置，所述车轮上设有与所述车架转动连接的固定板，所述固定板被限位于所述两个预设位置时，所述车轮分别处于第一位置和第二位置。
优选地，所述固定板上设有能与所述滑槽滑动配合的限位柱。
优选地，所述限位柱通过螺母锁死在所述定位部处。
本发明的手推车，需要调整车轮的位置时，直接将车轮连接在相应的定位部处即可，不需要支撑腿、传动杆等复杂的联动机构，简单、方便。
附图说明
以上所述的本发明的目的、技术方案以及有益效果可以通过下面的能够实现本发明的具体实施例的详细描述，同时结合附图描述而清楚地获得。
附图以及说明书中的相同的标号和符号用于代表相同的或者等同的元件。
图1为手推车处于平推模式的示意图。
图2和图3为手推车处于斜推模式时工作状态的示意图。
图4和图5为手推车处于斜推模式时存储状态的示意图。
图6为本发明第二实施例中的手推车处于平推状态的示意图，支撑腿处于打开状态。
图7为图6所示的手推车的局部放大图。
图8为本发明第二实施例中的手推车处于立推状态的示意图，支撑腿处于折叠状态。
图9为本发明第二实施例中的手推车的托板打开时的示意图。
图10为图9所示的手推车的局部放大图。
图11为本发明第二实施例中的手推车的托板折叠时的示意图。
图12为本发明第三实施例中的手推车处于平推状态的示意图，支撑腿处于打开状态。
图13为本发明第三实施例中的手推车处于立推状态的示意图，支撑腿处于折叠状态。
图14为本发明第三实施例中的手推车的托板折叠时的示意图。
图15为图14的手推车的局部放大图。
图16为本发明第三实施例中的手推车的托板打开时的示意图。
图17为图16所示的手推车的另一角度的示意图。
图18为图17所示的手推车的局部放大图。
图19为本发明第四实施例的手推车处于平推状态的示意图。
图20为本发明第四实施例的手推车处于立推状态的沿第一角度的示意图。
图21为本发明第四实施例的手推车处于立推状态的沿第二角度的示意图。
图22为本发明第四实施例的手推车处于立推状态的沿第三角度的示意图。
图23为本发明第五实施例的手推车处于平推状态的示意图。
图24为本发明第五实施例的手推车处于立推状态的示意图。
图25为本发明第五实施例的手推车处于平推状态的沿第一角度的示意图。
图26为本发明第五实施例的手推车处于平推状态的沿第二角度的示意图。
100、手推车             110、车架               112、把手
114、导向件             1142、定位孔            116、支撑架
120、车轮               130、车轴               140、支撑腿
150、限位件             160、固定板             162、限位柱
170、传动杆             180、置物腔
200、手推车             210、车架               212、把手
214、导向件             2142、定位孔            216、导槽
2162、导向槽            2163、第一定位槽        2164、第二定位槽
2166、第一凸起部        2167、第一凹陷部        2168、第二凸起部
2169、第二凹陷部        220、车轮               230、转轴
240、支撑腿             250、限位件             260、托板
262、定位柱             264、承载部             266、侧板
300、手推车             310、车架               312、把手
314、限位销             320、车轮               340、支撑腿
350、限位件             360、托板               362、限位槽
3622、第一定位槽        3624、第二定位槽
400、手推车             410、车架               412、把手
420、车轮               430、第一车轴           440、第二车轴
500、手推车             510、车架               514、前端支架
516、第一定位孔         518、第二定位孔         520、车轮
530、车轴               540、固定板             542、第一限位孔
544、第二限位孔         546、枢轴
具体实施方式
为了便于理解本发明，下面将参照相关附图对本发明进行更全面的描述。附图中给出了本发明的较佳的实施例。但是，本发明可以以许多不同的形式来实现，并不限于本文所描述的实施例。相反地，提供这些实施例的目的是使对本发明的公开内容的理解更加透彻全面。
需要说明的是，当元件被称为“固定于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。相反，当元件被称作“直接在”另一元件“上”时，则不存在中间元件。本文所使用的术语“垂直的”、“水平的”、“左”、“右”以及类似的表述只是为了说明的目的。
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本发明。本文所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
下面结合附图，说明手推车的较佳实施方式。
请参考图1至图5，揭示了一种手推车100，其包括纵向延伸的车架110、活动地连接于车架110底部的车轮120。车架110顶部敞开并形成可容纳货物的置物腔180，当然不限于腔体结构，只要能承载货物即可。车轮120为行走元件。
车架110的一端设置有供使用者握持的把手112。本实施例中，把手112一端连接于车架110，另一端为自由端。把手112设置有一对，且把手112的自由端之间没有连接，当然也可以增加连接两个把手112的横杆。把手112朝向车轮120所在一侧弯曲。
车轮120活动地连接于车架110的底部，具体来说，车轮120转动安装在车轴130上，车轴130固定于车架110的底部，并且车轴130可相对车架110转动。在本实施例中，车轴130能够相对于车架110前后移动。请参考图2和图3，车轴130通过固定板160连接于车架110，而固定板160可枢转地设于车架110。具体地，手推车100还包括支撑架116，支撑架116固定于车架110， 固定板160通过枢轴可转动地连接于支撑架116。因此，通过操作车轴130可使固定板160围绕支撑架116进行枢转，从而带动车轮120在靠近车架110的端部的第一位置和远离车架110的端部的第二位置间切换。
参见图1所示，当车轮120处于远离车架110的第一位置时，车架110平面基本与地面平行，呈基本水平的状态，手推车100处于平推模式。平推模式下的手推车常用于利用车架110平面以下的置物腔180来运送散装物料。平推模式下的手推车100具有工作状态和停歇状态，图1所示的为停歇状态，当抬起把手112，使车架110平面向上转动时，手推车由停歇状态变换为工作状态。
参见图2至图3所示，当车轮120被操作到靠近车架110的端部的第二位置时，车架110处于倾斜的状态，车架110与垂直于地面的方向形成夹角，此时的手推车100处于斜推模式，常用于利用车架110的平面来支撑大块物件以实现斜推。斜推模式下的手推车100具有工作状态和存储状态，图2和图3展示的是工作状态，在工作状态时，手推车100只有车轮120着地。
参见图4和图5所示，为手推车100在斜推模式下的存储状态，此时的车轮120和车架110的端部共同支撑手推车100，车轮120和车架110的端部同时着地。后文将对此做进一步描述。
请重新参见图1，手推车100还包括支撑腿140，支撑腿140活动地连接在车架110设置把手112的一端的底部。在本实施例中，支撑腿140的一端转动地连接在车架110上，使得支撑腿140能够在收拢与打开两个位置之间转动。
如图1所示，手推车100处于平推模式，支撑腿140打开，并与车轮120一起支撑共同手推车100。打开的支撑腿140提升了车架110在把手112一端的高度，使得用户在推行手推车100的中途停歇时，能够继续抬高置物腔180，防止散装物料从突然降低的置物腔180中滚落。
如图2至图5所示，在斜推模式下，车轮位于120靠近车架110的端部的第二位置，在车轮120同样着地的情况下，车架110远离把手112的端部相较于平推模式下的车架110的端部更低，因而在把手112高度相同的情况下，斜推模式下的车架110呈倾斜状态。在此状态下，如果支撑腿140继续呈打开状态则会碰触到用户身体，造成意外的伤害。为此，当手推车100由平推模式切 换为斜推模式时，用户需要将支撑腿140由打开位置切换为收拢位置。
参见图2、图3所示，具体为手推车100在斜推模式下的工作状态，在此状态下，用户两手抬起把手112，车架110倾斜，仅有车轮120着地。
参见图4、图5所示，具体为手推车100在斜推模式下的存储状态，在此状态下，用户向更高处抬举把手112，使得车架110远离把手112的一端的端部着地，与车轮120共同支撑手推车100。在此状态下，车架110与垂直于地面的方向形成夹角。手推车100在长度方向上占用的尺寸最小，便于存储。
如上所述，手推车100具有平推和斜推两种工作模式，当手推车100在平推模式时，车轮120位于远离车架110的端部的第一位置，支撑腿140处于打开位置，车轮120可与支撑腿140共同支撑手推车100；当手推车100在斜推模式时，车轮120位于靠近车架110的端部的第二位置，支撑腿140处于收拢位置，车轮120可与车架110的端部共同支撑手推车100。在现有技术中，当需要转换手推车100的工作模式时，需要分别动手操作车轮120和支撑腿140使二者改变位置，操作过程比较繁琐，不便于使用。
本发明的手推车100提供了连接车轮120和支撑腿140的传动杆170，使得车轮120和支撑腿140能够同时完成位置切换。也就是说，改变支撑腿140的状态时能够同时带动车轮120完成位置切换，反之亦然。
本发明的手推车100还包括锁定结构，锁定结构可操作地将手推车100锁定在平推模式或斜推模式。锁定结构可设于车轮120和车架110之间，具体地，设于固定板160和支撑架116之间。在本实施例中，锁定结构设于支撑腿140和车架110之间。
参考图1，锁定结构包括设于车架110上的导向件114，另外还提供了用以与导向件114配合以限位支撑腿140的限位件150。导向件114上间隔设置有两处定位孔1142。限位件150穿过支撑腿140，随着支撑腿140的枢转沿着导向件114移动，可选择地与两处定位孔1142的任一个相配合。两个定位孔1142分别对应支撑腿140的收拢位置和打开位置，这样支撑腿140通过简单、可靠的方式被保持在收拢状态或打开状态。
在本实施例中，导向件114呈弧形，两个定位孔1142之间的连线呈弧形， 同支撑腿140的枢转运动轨迹相吻合，这样导向件114的结构简洁，成本也较低。
这样，支撑腿140在打开或收拢时，通过传动杆170带动固定板160绕其枢点转动，固定板160在转动的同时则能带动车轮120相对于车架110前后移动。当支撑腿140枢转到与车架110基本垂直的状态，或枢转到与车架110形成夹角的状态时，限位件150可插入导向件114的对应的定位孔1142完成定位，使得手推车100保持在平推或斜推模式。如此，手推车110通过操作支撑腿140使其带动车轮120前后移动来适应平推与斜推模式的转换。当然，如果将锁定结构设置在车轮120和车架110之间，通过操作车轴130使车轮120移动并在第一位置或第二位置上定位，同时车轴130通过传动杆170带动支撑腿140运动，使支撑腿140在打开位置或收拢位置定位。
如图1，支撑腿140处于打开位置，手推车100处于平推模式，车轮120的位置较图2所示的斜推状态更靠近支撑腿140。支撑腿140被收拢时，支撑腿140将驱动传动杆170朝向车轮120所在一侧运动，使得固定板160带动车轮120远离支撑腿140运动至图2和图3的位置。此时，车轮120更靠近车架110远离把手112一端的端部，适于斜推的状态。
需要指出的是，支撑腿140与车架110之间也可以是插拔式连接，而传动杆170仍与支撑腿140连接。这样，当支撑腿140插入到车架110上的收容位置中时，支撑腿140处于收拢状态；当支撑腿140从收容位置中拔出一定长度时，支撑腿140处于打开状态。支撑腿140可以是在与垂直于地面的方向呈夹角的方向上斜向运动或沿水平方向插拔运动，这样，支撑腿140插入或拔出时均能带动传动杆170运动，从而带动固定板160转动，进而带动车轮120前后移动。
限位件150用以限制支撑腿140，从而可以间接定位固定板160。为进一步提高定位效果，防止意外情况，请参考图2和图3，固定板160上还设置有限位柱162。平推和斜推状态下，限位柱162抵接在支撑架116的侧边上的不同位置，有效起到限制固定板160转动范围及定位固定板160的作用。上述描述中，固定板160上的限位柱162只有一个。需要指出，固定板160上可设置两 处限位柱162，平推和斜推状态下，不同的限位柱与支撑架116的不同位置相抵接，这样，与只有一个限位柱相比，固定板160的转动范围相对较小，使车轮120的调整范围进一步得以控制。
参见图2和3所示，手推车100处于斜推模式下的工作状态，斜推模式下的工作状态一方面便于大件物品的装载，同时，此模式下的手推车100在前后方向上的长度较小，因此可以更加灵活的转弯，特别是在路况不好时。
参见图4和图5所示，手推车100处于斜推模式下的存储状态，在此状态下，车轮120和车架110的一端共同支撑车架110，使车架110与垂直于地面的方向之间形成夹角α。优选地，夹角α的角度范围为10～30度。当夹角α为10度时，车架110在前后方向的长度最小，便于在较小的空间内存放手推车100，当夹角α为30度时，车架110在竖直方向上的高度最小，便于个子不高的用户取用手推车100。进一步地，夹角α的角度范围为10～20度，更进一步地，夹角α的角度范围为15～20度。这样，在存储状态时，手推车100在前后方向上的占地面积较小，便于存储收纳；另外，较车架110垂直于地面的情形，手推车100在竖直方向上的高度较低，使得把手112距地面较低，使用者再次操作手推车100时比较方便，特别是对于身材相对矮小的人来说。此外，把手112朝向车轮120所在一侧弯曲，可使得手推车100处于存储状态时，把手112距地面更近。
继续参见图4所示，在手推车100的斜推模式的存储状态中，假设手推车100的重力为G，手推车100的重心G在手推车100的置物腔180上，则重心G在地面上的投影位于车轮120的着地点和车架110端部的着地点之间。进一步说，假设重心G在地面上的投影到车轮120的着地点之间的距离为L，地面对车架110端部的支持力为F，车架110端部的着地点到车轮120的着地点之间的距离为L1，则手推车100的重心满足G×L＝F×L1的关系。
最后，需要指出的是，本发明中，车轮120设有一对，安装在车轴130的两端，且分别位于车架110的两侧。相应地，与车轮120相配合的固定板160，及与固定板160相连的传动杆170也均设有两处。两处车轮120，使手推车100承载能力更强，也使运动更平稳。
请参考图6至图11，实施例二揭示了一种手推车200，其包括车架210、安装在车架210底部的车轮220。车架210顶部敞开并形成可容纳货物的腔体，当然不限于腔体结构，只要能承载货物即可。车轮220为行走元件。
车架210的一端设置有供使用者握持的把手212。本实施例中，把手212设置有一对，且把手212的自由端之间没有连接，当然也可以增加连接两个把手的横杆。
车轮220通过转轴230转动安装于车架210的底部。车轮220固定在转轴230上。转轴230转动安装于车架210上。这样，车轮220置于地面时，车架210能够相对于车轮220转动，使车架210能够处于水平(参图6)和倾斜(参图8)两种状态。车架210处于水平状态时，手推车200能够进行平推。车架210处于倾斜状态时，手推车200能够实现立推。
车架210设置把手212的一端还设置有安装在车架210底部的支撑腿240。请参考图6，支撑腿240的一端转动连接在车架210上，使得支撑腿240能够在折叠与打开两个位置之间转动。如图6所示，支撑腿240处于打开状态时，支撑腿240与车轮220一起支撑车架210，使车架210能够保持水平状态时，车架210内放置的货物不会掉出来。如图9和图11所示，支撑腿240折叠后，使用者可以平推手推车200使其前进。
如图8所示，车架210可以相对于车轮220转动至倾斜状态，使手推车200处于立推状态。立推状态一方面便于重物的装载，同时，立推状态下的小推车200在前后方向上的长度较小，因此可以更加灵活的转弯，特别是在路况不好时。此外，立推状态减小了手推车200的占地面积，便于存储。本实施例中，车轮220相对于车架210仅能转动，不能前后移动。车架210倾斜时，手推车200依靠车轮220和车架210的端部共同支撑车架，使车架210保持倾斜状态，使手推车200维持立推状态。
本实施例的手推车200，从平推至立推的转换非常方便，只需要向上抬动把手212，使车架210由水平状态转换至倾斜状态即可。当手推车200被平推前进及立推前进时，需要支撑腿240可靠折叠在车架210上；而手推车200平放于地面时，又需要支撑腿240可靠地保持在打开状态。请参考图8，本实施 例中，在车架210上固定有导向件214，另外还提供了用以与导向件214配合以限位支撑腿240的限位件250。导向件214上间隔设置有两处定位孔2142。限位件250所述支撑腿240且能分别与两处定位孔2142相配合。两个定位孔2142分别对应支撑腿240的折叠位置和打开位置，这样支撑腿240不需要借助联动机构、车轮220等，通过简单可靠的方式被保持在折叠状态或打开状态。
本实施例中，导向件214呈弧形，两个定位孔2142之间的连线呈弧形，刚好同支撑腿240的转动轨迹相吻合，这样导向件214的结构简洁，成本也较低。需要指出的是，此处，导向件214是作为车架210的一个附件安装于车架210上，其目的是为了适应车架210底部的轮廓要求，因此可以理解的是，导向件214并非必须的，例如，也可以是限位件250能够与车架210配合，使支撑腿240能够被限位件250保持在折叠状态或打开状态。
为了增加手推车200立推状态下支撑重物的可靠性，车架210远离把手212的另一端还连接有能相对于车架210折叠或打开的托板260。这样，当车架210倾斜时，托板260处于打开状态并用以支撑货物。需要存储手推车200时，可以将托板260折叠在车架210上。
请参考图6、图7和图10，车架210上设置有导槽216，其中导槽216包括中间的导向槽2162及两端的第一定位槽2163和第二定位槽2164。托板260可动连接于车架210，托板260上设有容纳在导槽216中且能够在导槽216中移动的定位柱262。请参考图7，并结合图10，定位柱262位于第一定位槽2163中时，托板260被保持在折叠状态。请参考图10，定位柱262位于第二定位槽2164中时，托板260被保持在打开状态。
请参考图7和图10，导槽216位于第一定位槽2163与导向槽2162之间的部分的两个内壁中的一个形成有第一凸起部2166，另一个对应形成有第一凹陷部2167。这样，定位柱262位于第一定位槽2163中时，第一凸起部2166防止定位柱262轻易进入导向槽2162中，同时由于第一凹陷部2167的存在，定位柱262可以被操作然后经由第一凹陷部2167进入导向槽2162中。同样地，导槽216位于第二定位槽2164与导向槽2162之间的部分的两个内壁中的一个形成有第二凸起部2168，另一个对应形成有第二凹陷部2169。这样，定位柱262 位于第二定位槽2164中时，第二凸起部2168防止定位柱262轻易进入导向槽2162中，同时由于第二凹陷部2169的存在，定位柱262可以被操作然后经由第二凹陷部2169进入导向槽2162中。这样，托板260就能够分别被定位在两个定位槽中，以分别被保持在折叠或打开状态。
请参考图7和图10，托板260包括在打开状态下用来支撑货物的承载部264及自承载部264侧边延伸的侧板266。前述的定位柱262即设置在侧板266上，这样，定位柱262可方便地自车架210的侧部插入导槽216中。为了保持托板260的平衡，承载部264的两侧均设置有侧板266，这样两个侧板266上的定位柱262就分别自车架210的两侧插入到对应的导槽216中。
请参考图11，手推车200平推时，托板260通常被折叠起来，以减小高度。而某些时候，平推时，托板260也会被打开用以阻挡及支撑货物。因此，本实施例中，定位柱262位于第二定位槽2164中，托板260被保持在打开状态时，此时托板260同时还抵靠于车架210，请参考图10。这样，来自于货物的压力就通过托板260作用于车架210，而非仅靠定位柱262与第二定位槽2164的相互作用，更好地保证托板260能够发挥作用。
上述手推车200，实现平推和立推模式的转换非常方便，只需要抬起把手212使车架210绕转轴230转动即可。此外，使支撑腿240在折叠与打开状态间转换是通过旋转支撑腿240来实现，支撑腿240的定位是通过限位件250来实现，简单可靠，能够快速实现支撑车架210的目的，及快速将支撑腿240折叠以避免影响手推车200的前进。同时，托板260的设置还增大了手推车200平推和立推状态下的承重能力，托板260的折叠与打开只需要一个简单的抽拉动作即可实现，结构简单，操作方便。
此外，还需要指出的是，支撑腿240与车架210还可以是插拔式连接，此时，同样，利用采用限位件250可以使支撑腿240保持在折叠或打开状态。
请参考图12至图18，实施例三的手推车300包括车架310、车轮320。车架310的一端设置有把手312、支撑腿340及限制支撑腿340位置的限位件350。车架310的另一端设置有托板360。
实施例三的手推车300，其车架310、车轮320、把手312、支撑腿340及 限位件350与实施例一完全相同。二者实现平推和立推模式转换的方式也相同，不再赘述。二者的区别在于托板在车架310上连接方式不同，以及托板360的折叠和打开的方式不同。
请参考图12至图18，实施例三中，托板360转动连接于车架310，且托板360能够沿垂直于托板360的转动平面的方向相对于车架310左右滑动，即如图9至图11所示，托板360能够左右滑动。
车架310上间隔设置有两个限位销314。托板360上对应设置有两个限位槽362。请参考图12至图15，限位槽362包括第一定位槽3622和第二定位槽3624，第一定位槽3622和第二定位槽3624在垂直于前述的托板360的转动平面的方向上错开且彼此连通。这样，限位销314就可选择地与第二定位槽3624和第一定位槽3622配合以限制所述托板360转动或解除所述限制。
请参考图15，托板360处于折叠状态，限位销314位于第二定位槽3624中。请参考图16至图18，当需要托板360打开时，先使托板360相对于车架310移动，使限位销314从第二定位槽3624中脱离并进入到第一定位槽3622中，然后转动托板360至打开状态。当托板360运动至打开状态时，再使托板360相对于车架310移动，使限位销314从第一定位槽3622中进入第二定位槽3624中，此时第二定位槽3624与限位销314相作用并限制托板360转动。可以理解的是，可以只在车架310一侧边设置一处限位槽362和限位销314，保证车架310与托板360能够相对转动及滑动即可。
上述手推车300，实现平推和立推模式的转换非常方便，只需要抬起把手312使车架310转动即可。此外，使支撑腿340在折叠与打开状态间转换是通过旋转支撑腿340来实现，支撑腿340的定位是通过一个限位件350来实现，简单可靠，能够快速实现支撑车架310的目的，及快速将支撑腿340折叠以避免影响手推车300的前进。同时，托板360的设置还增大了手推车300平推和立推状态下的承重能力，托板360的折叠与打开只需要一个简单的翻转动作即可实现，结构简单，操作方便。
请参考图19至图22，实施例四揭示了一种手推车400，其包括车架410及车轮420。车架410顶部敞开并形成可容纳货物的腔体，当然不限于腔体结 构，只要能承载货物即可。车轮420为行走元件。
车架410具有相对的前端和后端，其中前端处安装有把手412。车架410上靠近后端处设有两处定位部。两处定位部在前端至后端的前后方向上错开设置。车轮420分别被固定于两处定位部处时，车轮420被定位在车架410上的第一、第二两个不同位置。这样，就实现了车轮420在车架410的位置能够调节的目的。下面进一步详细介绍。
本实施例中，两处定位部为固定在车架410上的第一车轴430和第二车轴440。参图19所示，手推车400处于平推的状态，此时车轮420固定于第一车轴430，车轮420更靠近车架410的前端(即把手412所在一端)，车轮420处于第一位置。参图20至图22，手推车400处于立推状态时，车轮420固定于第二车轴440，此时车轮420更靠近车架410的后端(远离把手的一端)，处于第二位置。
车轮420与第一车轴430或第二车轴440之间均为可拆卸式固定连接。具体而言，车轮420与第一车轴430或第二车轴440之间可为插拔式连接，然后利用定位销串联定位，使车轮420固定于第一车轴430上或第二车轴440上，这种方式便于更换车轮420。这样，当需要调节车轮420的位置时，只需要拔下定位销，然后从第一车轴430或第二车轴440上拉出车轮420，然后将车轮420的连接部插在另一个车轴上即可。
本实施例中，直接在车架410上设置好定位部，车轮420分别被固定于两处定位部处时，车轮420将分别被定位在车架410上的第一位置(对应平推)和第二位置(对应立推)。实现车轮420位置的调节和定位不需要采用复杂的传动机构，简单、方便。
请参考图23至图26，实施例五揭示了一种手推车500，其包括车架510及车轮520。与实施例四相似，车架510沿其前后方向设置有两处定位部。车轮520分别与两处定位部固定连接时，车轮520被定位在车架510上的第一、第二两个不同位置。这样，车轮520在车架510上的位置就得以调节。
请参考图23至图26，车架510的前端上还设有用来安装附件的前端支架514。车架510上的定位部为在车架510的前后方向上错开设置在前端支架514上的第一定位孔516和第二定位孔518。
车轮520转动安装在车轴530上。具体而言，车轮520的连接部与车轴530之间为插拔式连接，然后利用定位销串联，以便于拆卸更换车轮520。车轴530穿过固定板540。固定板540则通过枢轴546转动连接于前端支架514。这样，车轮520通过车轴530转动连接于固定板540。而车轮520系通过固定板540与两个定位孔相固定。
固定板540上设有第一限位孔542和第二限位孔544。固定板540绕其枢转点转动时，带动车轮520也绕固定板540的枢转点转动。这样，车轮520在车架510前后方向上的位置就可以得以改变。在固定板540的转动过程中，第一限位孔542能够运动到与第一定位孔516对齐的位置，而第二限位孔544也能够运动到与第二定位孔518对齐的位置，但两处对齐不是同时发生。
请参考图23和图25，并请结合图24，手推车500处于平推状态，此时，第一限位孔542与第一定位孔516对齐，而第二限位孔544与第二定位孔518错开。车轮520在前后方向上距离车架510的前端最近。此时，使用定位销穿过第一限位孔542和第一定位孔516，即使固定板540的位置固定，进而使车轮520固定于第一位置。
请参考图24和图26，手推车500由平推状态转换为立推状态时，只需要移除定位销，使第一限位孔542与第一定位孔516能够脱离对齐状态，然后使固定板540转动直到第二限位孔544与第二定位孔518对齐，此时第一限位孔542与第一定位孔516是错开的。转换过程中，固定板540转动时，车轮520随之转动，当第二限位孔544与第二定位孔518对齐，车轮520运动到第二位置，该位置较第一位置更靠近车架510的前端，因此，车架510立起后在车轮520的支撑下可以尽量倾斜，且不会使车架510的前端碰到地面，因此以适应立推。当用定位销穿过第二限位孔544与第二定位孔518后，固定板540的位置就被固定，进而使车轮520被固定于第二位置。
本实施例中，通过直接将固定板540分别与在车架510上的两处定位部固定连接，使车轮520能够分别被定位在第一位置(对应平推)和第二位置(对应立推)，实现车轮520位置的调节及定位也并不需要采用复杂的传动机构，简单、方便。
最后，还需要指出的是，在其他的实施例中，前端支架514上的两个定位 孔也可以连成一体并形成一滑槽。可以选取滑槽的两个预设位置作为定位部，例如滑槽的两个末端处作为两个定位部。此时，固定板540上可设置能与滑槽滑动配合的限位柱。限位柱可通过螺母锁死在滑槽的末端处，使得车轮520能被限位第一位置或第二位置。需要调整手推车500的状态时，只需要旋松螺母，然后使限位柱滑动到对应的定位部处，最后再度锁死即可。限位柱滑动的过程中将带动车轮520整体偏转，从而实现位置的调节及定位。这种方式较传统方案需要复杂的传动机构，同样非常简单、方便。
本发明不局限于所举的具体实施例结构，基于本发明构思的结构均属于本发明保护范围。

Claims (27)

  1. 一种手推车，包括
    纵向延伸的车架；
    车轮，活动地连接于所述车架的底部，可操作地在离开所述车架的端部的第一位置和靠近所述车架的端部的第二位置间切换；
    支撑腿，活动地连接于所述车架，可操作地在收拢位置和打开位置之间切换；
    所述手推车具有平推和斜推两种模式，当所述手推车在平推模式时，所述车轮位于所述第一位置，所述支撑腿位于所述打开位置；当所述手推车在斜推模式时，所述车轮位于所述第二位置，所述支撑腿位于所述收拢位置；其特征在于：当所述手推车在斜推模式时，所述车轮能够与所述车架的端部共同支撑所述手推车，当所述车轮与所述车架的端部共同支撑所述手推车时，所述车架与垂直于地面的方向形成夹角；所述手推车还包括连接车轮和支撑腿的传动杆，使得所述车轮和所述支撑腿同时完成位置切换。
  2. 根据权利要求1所述的手推车，其特征在于：所述夹角的角度范围为10～30度。
  3. 根据权利要求1所述的手推车，其特征在于：在所述斜推模式中，当所述车轮与所述车架的端部共同支撑所述手推车时，所述手推车的重心在地面的投影位于所述车轮的着地点与所述车架的端部的着地点之间。
  4. 根据权利要求1所述的手推车，其特征在于：所述手推车还包括锁定结构，所述锁定结构可操作地将所述手推车限定在所述平推模式或斜推模式。
  5. 根据权利要求6所述的手推车，其特征在于：所述锁定结构设于所述支撑腿和所述车架之间。
  6. 根据权利要求5所述的手推车，其特征在于：所述锁定结构包括设于车架上的导向件，所述导向件上间隔设置有两个定位孔，所述锁定结构还包括设于所述支撑腿上的限位件，所述限位件沿所述导向件移动并可选择地与所述两个定位孔的任一个相配合。
  7. 根据权利要求1所述的手推车，其特征在于：所述支撑腿可枢转地设 于所述车架上。
  8. 根据权利要求1所述的手推车，其特征在于：所述车轮通过固定板连接于所述车架，所述固定板可枢转地设于所述车架。
  9. 根据权利要求1所述的手推车，其特征在于：所述传动杆一端连接于所述支撑腿，一端连接于所述固定板。
  10. 根据权利要求1所述的手推车，其特征在于：所述手推车还包括设于车架一端的把手，所述把手朝向所述车轮所在一侧弯曲。
  11. 一种手推车，包括车架、安装于所述车架底部的车轮，所述车架还设置有把手及支撑腿，其特征在于，所述支撑腿可动连接于所述车架，所述支撑腿能在折叠和打开两个位置之间转换，所述手推车还包括与所述车架配合以分别将所述支撑腿保持在折叠和打开位置的限位件。
  12. 根据权利要求11所述的手推车，其特征在于，所述支撑腿转动连接于所述车架，所述支撑腿能在折叠和打开两个位置之间转动。
  13. 根据权利要求11所述的手推车，其特征在于，所述支撑腿与所述车架插拔式连接。
  14. 根据权利要求12或13所述的手推车，其特征在于，所述车架上设有导向件，所述导向件上间隔设置有两处定位孔，所述限位件穿过所述支撑腿且能分别与所述两处定位孔相配合。
  15. 根据权利要求14所述的手推车，其特征在于，所述导向件呈弧形。
  16. 根据权利要求11所述的手推车，其特征在于，所述车架相对于所述车轮可转动设置，所述车架能在水平和倾斜两个状态之间转换，其中，所述车架处于水平状态时，所述支撑腿打开时能与所述车轮共同支撑所述车架；所述车架处于倾斜状态时，所述车轮与所述车架的端部共同使所述车架依靠自身重力保持倾斜状态。
  17. 根据权利要求16所述的手推车，其特征在于，所述车轮固定于转轴上，所述转轴与所述车架转动连接。
  18. 根据权利要求17所述的手推车，其特征在于，所述车轮相对于所述车架不能移动。
  19. 一种手推车，包括车架、车轮，所述车架具有相对的前端和后端，其特征在于，所述车架上沿其前端至后端的前后方向设有两处定位部，所述车轮能选择地与所述两处定位部中的任一个实现连接，当所述车轮与不同的定位部连接时，所述车轮分别被定位在车架上的第一、第二两个不同位置。
  20. 根据权利要求19所述的手推车，其特征在于，所述两处定位部为在所述前后方向上错开设置的第一车轴和第二车轴，所述车轮固定于所述第一车轴时，所述车轮被定位在车架上的第一位置；所述车轮固定于所述第二车轴时，所述车轮被定位在车架上的第二位置。
  21. 根据权利要求20所述的手推车，其特征在于，所述车轮与所述第一车轴或第二车轴之间为插拔式连接，且能通过定位销串联定位。
  22. 根据权利要求19所述的手推车，其特征在于，所述定位部为在所述前后方向上错开设置的第一定位孔和第二定位孔，所述车轮安装在车轴上，所述车轴固定在固定板上，所述固定板与所述车架转动连接，所述固定板上还设有第一限位孔和第二限位孔，其中，所述第一定位孔与第一限位孔对准、所述第二定位孔与第二限位孔错开时，所述车轮处于所述第一位置；所述第二定位孔与第二限位孔对准、所述第一定位孔与第一限位孔错开时，所述车轮处于所述第二位置。
  23. 根据权利要求22所述的手推车，其特征在于，所述第一限位孔与所述第一定位孔之间能通过定位销连接；所述第二限位孔与所述第二定位孔之间能通过定位销连接。
  24. 根据权利要求22所述的手推车，其特征在于，所述车架的前端设有前端支架，所述第一定位孔和第二定位孔设置在所述前端支架上，所述固定板通过枢轴转动连接于所述前端支架。
  25. 根据权利要求19所述的手推车，其特征在于，所述车架上开设有滑槽，所述两处定位部为所述滑槽中的两个预设位置，所述车轮上设有与所述车架转动连接的固定板，所述固定板被限位于所述两个预设位置时，所述车轮分别处于第一位置和第二位置。
  26. 根据权利要求25所述的手推车，其特征在于，所述固定板上设有能与 所述滑槽滑动配合的限位柱。
  27. 根据权利要求26所述的手推车，其特征在于，所述限位柱通过螺母锁死在所述定位部处。
PCT/CN2015/085509 2014-07-29 2015-07-30 手推车 WO2016015652A1 (zh)

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CN201410366180.5 2014-07-29
CN201410366180.5A CN105329268A (zh) 2014-07-29 2014-07-29 手推车
CN201410479259.9A CN105480265A (zh) 2014-09-18 2014-09-18 手推车
CN201410479306.X 2014-09-18
CN201410479259.9 2014-09-18
CN201410479306 2014-09-18
CN201520535180.3 2015-07-22
CN201520535180.3U CN205034143U (zh) 2014-09-18 2015-07-22 手推车

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CN110606118A (zh) * 2019-11-13 2019-12-24 嘉兴市菲氏顺风电动车有限公司 一种自制电动手推车
CN113910885A (zh) * 2021-11-09 2022-01-11 博雷顿科技有限公司 一种自紧固换电机构及具有其的车辆
CN115107842A (zh) * 2022-07-13 2022-09-27 南京锐拓应急装备科技有限公司 一种便携式折叠应急救援手推车及其使用方法

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CN107097824A (zh) * 2017-03-31 2017-08-29 深圳广田机器人有限公司 建筑工地助力搬运车
CN110606118A (zh) * 2019-11-13 2019-12-24 嘉兴市菲氏顺风电动车有限公司 一种自制电动手推车
CN113910885A (zh) * 2021-11-09 2022-01-11 博雷顿科技有限公司 一种自紧固换电机构及具有其的车辆
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