CN112092893A - Multifunctional carriage - Google Patents

Abstract

The invention discloses a multifunctional carriage, which comprises a carriage body, a wheel assembly and a pushing assembly, wherein the wheel assembly and the pushing assembly are arranged at the bottom of the carriage body, the pushing assembly comprises a push rod frame and a seat, the push rod frame can be folded along the length direction of the push rod frame, the seat can be opened or folded relative to the push rod frame, the push rod frame can rotate relatively and can be connected with the carriage body in a relative sliding manner along the front-back direction of the carriage body, the carriage has a dragging working state and a pushing working state, when the carriage is in the dragging working state, the push rod frame is folded along the length direction and is mutually folded with the seat, and the pushing assembly is folded at the bottom of the; when the carriage is in a pushing working state, the push rod frame is unfolded along the length direction of the carriage and gradually inclines upwards from back to front, and the seat is unfolded relative to the push rod frame and is positioned above the carriage body. The multifunctional carriage can be grafted on the tail of the baby carriage to be towed, and can also be pushed independently for children to ride on, so that the use requirements under different scenes are met.

Description

Multifunctional carriage

Technical Field

The invention relates to the field of children products, in particular to a multifunctional carriage.

Background

In the prior art, the child carriage is typically fixedly attached to the rear of the stroller to facilitate another child to stand behind the stroller and travel with the stroller while pushing the stroller. The existing children carriage has single function and short service life, and can not meet the use requirements in more scenes.

Disclosure of Invention

The invention aims to provide a multifunctional carriage which can be grafted on the tail of a baby carriage to be towed and can be converted into a cart to be pushed independently.

In order to achieve the purpose, the invention adopts the technical scheme that:

a multifunctional carriage comprises a carriage body, a wheel assembly arranged at the bottom of the carriage body, and a pushing assembly, wherein the pushing assembly comprises a push rod frame capable of being folded along the length direction of the pushing assembly and a seat capable of being opened or folded relative to the push rod frame, the push rod frame can rotate relatively and can be connected with the carriage body in a relative sliding manner along the front-back direction of the carriage body, the carriage has a dragging working state and a pushing working state, when the carriage is in the dragging working state, the push rod frame is folded along the length direction and is mutually folded with the seat, and the pushing assembly is folded at the bottom of the carriage body; when the carriage is in the pushing working state, the push rod frame is unfolded along the length direction of the carriage and gradually inclines upwards from back to front, and the seat is unfolded relative to the push rod frame and is positioned above the carriage body.

Preferably, one end of the seat is rotatably connected to the push rod frame, the push assembly further comprises a support rod frame for supporting between the seat and the carriage body in the push working state, and when the carriage is in the push working state, the support rod frame is connected to the carriage body; when the carriage is in the dragging working state, the support rod frame is separated from the carriage body and mutually folded with the push rod frame and the seat.

Preferably, the stay bar frame includes an upper stay bar and a lower stay bar both extending in the up-down direction in the push operation state, a lower end portion of the upper stay bar is detachably connected to an upper end portion of the lower stay bar, and when the carriage is in the push operation state, the upper stay bar and the lower stay bar extend in the same vertical direction and are supported between the carriage body and the seat.

Preferably, the brace frame further comprises a diagonal brace, one end of the diagonal brace is rotatably connected with the seat or the push rod frame, the other end of the diagonal brace is rotatably connected with the lower brace, when the planker is in the dragging working state, the upper brace and the lower brace are detached from each other, the upper brace is folded at the bottom of the seat, and the lower brace and the diagonal brace are folded at the bottom of the seat.

Preferably, a first locking mechanism for locking the upper support rod and the lower support rod relatively is arranged between the upper support rod and the lower support rod, a second locking mechanism for locking the lower support rod and the carriage body relatively is arranged between the lower support rod and the carriage body, and the first locking mechanism and the second locking mechanism are synchronously locked and/or interlocked and unlocked.

Preferably, the carriage body is provided with a mounting hole for the lower end part of the lower stay bar to be inserted in a matching way, the planker body is also provided with a lock hole communicated with the mounting hole, the second locking mechanism comprises a linkage slide block which can be arranged on the lower supporting rod in a sliding way along the length direction of the lower supporting rod and a lock tongue which is arranged at the lower end part of the lower supporting rod in a sliding way along the length direction vertical to the lower supporting rod, and an elastic part for providing acting force required by the movement of the lock tongue away from the lock hole, wherein wedge-shaped surfaces which are matched with each other are arranged between the lower part of the linkage sliding block and the lock tongue, the upper end part of the lower stay bar is provided with an insertion hole for the lower end part of the upper stay bar to be inserted in a matching way, when the lower end portion of the upper stay is inserted into the insertion hole and the first locking mechanism is locked, the linkage sliding block slides downwards and drives the lock tongue to be inserted into the lock hole in a matched mode.

Preferably, a guide groove extending in the front-rear direction and used for providing sliding guide for the push rod frame is formed in the bottom of the carriage body, a push rod joint is rotatably connected to one end of the push rod frame through a rotating shaft, the push rod joint can be connected with the carriage body in a sliding manner along the extending direction of the guide groove, and when the carriage is in the dragging working state, the rotating shaft is located in the guide groove; when the carriage is in the pushing working state, the rotating shaft is positioned outside the guide groove.

Preferably, the push rod frame comprises two push rods which are parallel to each other and arranged at intervals, the seat is connected between the two push rods, and when the planker is in the dragging working state, the seat is folded between the two push rods.

Preferably, the carriage further comprises a towing rod, the towing rod comprises a towing rod end, a towing rod body and a towing connecting piece, one end of the towing rod body is rotatably connected to the towing rod end through a rotating shaft, the towing connecting piece is arranged at the other end of the towing rod body, an accommodating groove which extends in the front-back direction and is used for providing sliding guidance for the towing rod is arranged on the carriage body, the towing rod end is arranged in the accommodating groove in a sliding fit manner, and when the carriage is in the towing working state, the towing rod body and the rotating shaft are both positioned outside the accommodating groove; when the planker is in the pushing working state, the rod body of the towing rod and the rotating shaft are both positioned in the accommodating groove.

Preferably, the wheel assembly comprises a front wheel assembly arranged at the front part of the bottom of the carriage body and a rear wheel assembly arranged at the rear part of the bottom of the carriage body, wherein the rear wheel assembly comprises a wheel seat and a rear wheel arranged at the bottom of the wheel seat, the wheel seat is rotationally connected to the carriage body through a universal shaft, a wheel seat locking mechanism for locking the wheel seat and the carriage body relatively is arranged between the wheel seat and the carriage body, and when the carriage is in the dragging working state, the wheel seat locking mechanism is in an unlocked state; when the carriage is in the pushing working state, the wheel seat locking mechanism is in a locking state.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the multifunctional carriage can be grafted on the tail of the baby carrier to be towed through conversion between the towing working state and the pushing working state, and can be used for children to ride and push independently, so that the use requirements under different scenes are met.

Drawings

FIG. 1 is a perspective view of a multi-function carriage according to an embodiment of the present invention in a push operation state;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a sectional view taken along line 1-1 of FIG. 2;

fig. 4 is a schematic perspective view of the multi-functional carriage in the folding process of the push rod frame;

FIG. 5 is a side view of FIG. 4;

FIG. 6 is a cross-sectional view taken along line 2-2 of FIG. 5;

fig. 7 is a schematic perspective view of the multi-functional carriage of the present embodiment when the push rod frame is folded and rotated to a horizontal state;

FIG. 8 is a side view of FIG. 7;

FIG. 9 is a sectional view taken along line 3-3 of FIG. 8;

FIG. 10 is a top view of FIG. 7;

FIG. 11 is a sectional view taken along line 4-4 of FIG. 10;

FIG. 12 is a perspective view of FIG. 7 from a bottom elevation;

fig. 13 is a schematic perspective view of the multi-functional carriage in the present embodiment in a towing operation state;

FIG. 14 is a side view of FIG. 13;

FIG. 15 is a cross-sectional view taken along line 5-5 of FIG. 14;

FIG. 16 is an enlarged view taken at A in FIG. 15;

FIG. 17 is a top view of FIG. 13;

FIG. 18 is a cross-sectional view taken along line 6-6 of FIG. 17

Fig. 19 is a schematic perspective view of the multi-functional carriage in this embodiment when the push rod frame and the carriage rod are both folded into the carriage body;

FIG. 20 is a side view of FIG. 19;

FIG. 21 is a cross-sectional view taken along line 7-7 of FIG. 20;

FIG. 22 is an enlarged view of B of FIG. 21;

FIG. 23 is a top view of FIG. 19;

FIG. 24 is a cross-sectional view taken along line 8-8 of FIG. 23

Fig. 25 is a schematic perspective view of the multi-functional carriage in the present embodiment in a towing operation state and connected to a stroller;

FIG. 26 is a side view of FIG. 25;

FIG. 27 is a top view of FIG. 25;

wherein: 1. a carriage body; 11. a guide groove; 12. pushing the assembly accommodating cavity; 13. an accommodating groove; 14. a push assembly locking member;

2. a wheel assembly; 21. a front wheel assembly; 22. a rear wheel assembly; 221. a wheel seat; 222. a rear wheel; 2221. a wheel axle;

3. a pushing assembly; 31. a push rod frame; 311. a push rod; 32. a seat; 331. an upper stay bar; 332. a lower stay bar; 333. a diagonal brace; 351. an upper stay bolt; 352. an upper stay locking hole; 361. an insertion hole; 362. a linkage slide block; 3621. a limiting pin shaft; 3622. a limiting chute; 363. mounting holes; 364. a lock hole; 365. a fourth elastic member; 366. a latch bolt; 3623. a wedge-shaped surface;

4. a tow bar; 41. a sliding rod body; 411. the end of the towing rod; 412. a fifth elastic member; 413. a first positioning lock groove; 414. a second positioning lock groove; 415. a drag rod positioning pin shaft; 42. a towing rod body; 421. a rotating shaft; 43. a trailing connector;

5. a wheel seat locking mechanism; 511. a lock pin; 512. locking the groove; 513. a first elastic member; 521. installing a sliding block; 522. pushing the inclined plane; 523. a second elastic member; 531. driving the slide block; 532. a drive ramp; 533. a third elastic member;

6. a child stroller; 61. a cart frame; 611. a rear bracket; 612; a rear cross bar; 62. pushing the front wheel of the vehicle; 63. the cart is pushed to the rear wheel.

Detailed Description

The technical solution of the present invention is further explained with reference to the drawings and the specific embodiments.

The following descriptions of the up-down, front-back, left-right, inner-outer, etc. are defined with reference to the orientation of a child sitting or standing on the carriage.

As shown in fig. 1, the multi-functional carriage comprises a carriage body 1 and a wheel assembly 2 disposed at the bottom of the carriage body 1, wherein the wheel assembly 2 specifically comprises a front wheel assembly 21 disposed at the front portion of the bottom of the carriage body 1 and a rear wheel assembly 22 disposed at the rear portion of the bottom of the carriage body 1, the rear wheel assembly 22 comprises a wheel seat 221 rotatably connected to the bottom of the carriage body 1 through a universal shaft (not shown in the figure), and a rear wheel 222 rotatably connected to the bottom of the wheel seat 221 through a wheel shaft 2221, in this embodiment, two sets of the front wheel assembly 21 and the rear wheel assembly 22 are respectively provided, and the structure of the front wheel assembly 21 is the same as that.

As shown in fig. 1, the carriage further includes a pushing assembly 3 disposed at the rear portion of the carriage body 1, and the pushing assembly 3 includes a push rod frame 31 capable of being unfolded and folded along the length direction thereof, and a seat 32 capable of being opened or folded relative to the push rod frame 31. In this embodiment, the push rod frame 31 includes two push rods 311 arranged in parallel and at an interval, the seat 31 is connected between the two push rods 311, the rear end of the seat 32 is rotatably connected to the push rod frame 31, and the push rod frame 31 is connected to the carriage body 1 so as to be capable of both relatively rotating and relatively sliding along the front-rear direction of the carriage body 1.

As shown in fig. 13 and 18, the carriage further includes a towing bar 4 disposed at the front portion of the carriage body 1, the towing bar 4 includes a towing bar body 42 at the front portion and a sliding bar body 41 at the rear portion, the towing bar body 42 and the sliding bar body 41 are rotatably connected through a rotating shaft 421, a towing connector 43 is disposed at the front end portion of the towing bar body 42, a towing bar end 411 is disposed at the rear end portion of the sliding bar body 41, a receiving groove 13 extending in the front-rear direction and used for slidably guiding the towing bar 4 is disposed on the carriage body 1, and the sliding bar body 41 is slidably disposed in the receiving groove 13. The drawbar 4 has an open state in which the drawbar body 42 and the rotary shaft 421 are both extended out of the receiving slot 13, and a retracted state in which the drawbar body 42 and the rotary shaft 421 are both located in the receiving slot 13.

As shown in fig. 1 and 13, the multi-functional carriage has a dragging operation state and a pushing operation state. As shown in fig. 1, when the carriage is in the push-out operating state, the push rod frame 31 is unfolded along the length direction thereof and gradually extends upwards from the back to the front in an inclined manner, the seat 32 is unfolded relative to the push rod frame 31 and is positioned above the carriage body 1, and the carriage 4 is in the retracted state, in which a child can sit on the seat 32 and an adult can push the carriage backwards. As shown in fig. 13, when the carriage is in the dragging operation state, the push rod frame 31 is folded along the length direction and is folded with the seat 32, the seat 32 is folded between the two push rods 311, the pushing assembly 3 is folded at the bottom of the carriage body 1, the push rod 4 is in the open state at this time, the push rod body 42 can rotate around the rotating shaft 421, so that the dragging connecting piece 43 can be hooked on the child carriage rods with different heights, in this state, a child can stand on the carriage body 1, and an adult pushes the child carriage to drive the child to move forward.

As shown in fig. 25 to 27, an embodiment of the carriage in the towing operation state is shown, a stroller 6 includes a stroller frame 61, a stroller front wheel 62 disposed at the front part of the stroller frame 61, and a stroller rear wheel 63 disposed at the rear part of the stroller frame 61. The cart frame 61 includes left and right rear brackets 611 having bottoms to which the rear wheels 63 are connected, and a rear cross bar 612 connected between the left and right rear brackets 611. The trailing bar in the trailing working state is hooked on the rear cross bar 612 by the trailing connecting piece 43, so as to be grafted on the tail of the stroller 6, thereby realizing the trailing function.

As shown in fig. 1, the pushing assembly 3 further comprises a support rod bracket for supporting between the seat 32 and the planker body 1 in the pushing operation state, wherein the support rod bracket comprises an upper support rod 331, a lower support rod 332 and a diagonal support rod 333. As shown in fig. 1 and 2, in the push operation state, the stay bracket is connected to the carriage body 1, the upper stay 331 and the lower stay 332 extend in the same vertical direction and are supported between the carriage body 1 and the seat 32, the lower end of the upper stay 331 and the upper end of the lower stay 332 are detachably connected, the upper end of the diagonal stay 333 is rotatably connected to the push rod bracket 31, and the lower end is rotatably connected to the lower stay 332. As shown in fig. 4 to 12, when the carriage is switched from the push operation state to the drag operation state, the support rod bracket is separated from the carriage body 1 and is folded with the push rod bracket 31 and the seat 32, the upper support rod 331 and the lower support rod 332 are separated from each other, the upper support rod 331 is folded at the bottom of the seat 32, and the lower support rod 332 and the diagonal support rod 333 are folded at the bottom of the seat 32.

As shown in fig. 3 and 6, a first locking mechanism for locking the upper stay 331 and the lower stay 332 relative to each other is provided between the upper stay 331 and the lower stay 332, a second locking mechanism for locking the lower stay 332 and the carriage body 1 relative to each other is provided between the lower stay 332 and the carriage body 1, and the first locking mechanism and the second locking mechanism are provided to lock and unlock synchronously and interlockingly.

As shown in fig. 3 and 6, the upper end of the lower stay 332 is provided with an insertion hole 361 into which the lower end of the upper stay 331 is inserted in a fitting manner, and the first locking mechanism includes an upper stay lock tongue 351 provided at the lower portion of the upper stay 331 so as to be slidable in a direction perpendicular to the longitudinal direction of the upper stay 331, an upper stay lock hole 352 provided in the insertion hole 361 so as to allow the upper stay lock tongue 351 to be inserted in a fitting manner, and an elastic member (not shown) for providing a force required for the upper stay lock tongue 351 to move toward the upper stay lock hole 352.

As shown in fig. 3 and 6, the carriage body 1 is provided with an installation hole 363 into which the lower end of the lower stay 332 is fittingly inserted, and the carriage body 1 is further provided with a lock hole 364 communicating with the installation hole 363. The second locking mechanism includes a linking slider 362 slidably disposed on the lower support rod 332 along the length direction of the lower support rod 332, a latch 366 slidably disposed at the lower end of the lower support rod 332 along the length direction perpendicular to the length direction of the lower support rod 332, and an elastic member, specifically, a fourth elastic member 365 for providing an acting force required for the latch 366 to move away from the lock hole 364, wherein a wedge-shaped surface 3623 is disposed between the lower portion of the linking slider 362 and the latch 366.

As shown in fig. 3, when the lower end portion of the upper stay 331 is inserted into the insertion hole 361, the interlocking slider 362 is pushed to slide downward, and the locking tongue 366 is driven to be fittingly inserted into the locking hole 364, and when the upper stay 33 is inserted into the insertion hole 361, the locking tongue 351 is fittingly inserted into the upper stay locking hole 352, the first locking mechanism is locked, and at this time, the locking tongue 366 is correspondingly inserted into the locking hole 364 to lock the second locking mechanism, so that the first locking mechanism and the second locking mechanism are synchronously locked. Similarly, as shown in fig. 6, when the lower end of the upper brace 331 is released from the insertion hole 361 after the first locking mechanism is unlocked, the latch bolt 366 is released from the locking hole 364 by the fourth elastic member 365, so that the second locking mechanism is unlocked, and thus the second locking mechanism and the first locking mechanism are unlocked in a linkage manner.

In addition, as shown in fig. 3 and fig. 6, in this embodiment, the linking slider 362 is further provided with a section of limiting sliding groove 3622 extending along the length direction thereof, the lower stay 332 is fixed with a limiting pin 3621, and the limiting pin 3621 is fittingly inserted into the limiting sliding groove 3622 to limit the linking slider 362 from being separated from the lower stay 332 when sliding up and down.

As shown in fig. 9, the bottom of the carriage body 1 is provided with a guide groove 11 extending in the front-rear direction for slidably guiding the push rod frame 31, the lower end of the push rod frame 31 is rotatably connected to a push rod joint (not shown) via a rotating shaft (not shown), and the push rod joint is slidably connected to the carriage body 1 along the extending direction of the guide groove 11. When the planker is in a dragging working state, the rotating shaft is positioned in the guide groove 11; when the carriage is in the pushing operation state, the rotating shaft is located outside the guide groove 11, the push rod frame 31 can rotate around the rotating shaft, and the connection relationship and the rotation principle of the push rod frame 31 and the carriage body 1 are similar to those of the drag rod 4, and are not described herein again. As shown in fig. 9 to 12, the bottom of the carriage body 1 is further provided with a pushing component accommodating cavity 12 for accommodating the pushing component 3 when the carriage is in the dragging operation state, and a pushing component locking member 14 for locking the pushing component 3.

As shown in fig. 15, 16, 21 and 22, the tow bar 4 is positioned between the two sets of rear wheel assemblies 22 in the left-right direction, and a wheel base locking mechanism 5 for locking the wheel base 221 and the tow bar body 1 relative to each other is provided between them. When the carriage is in a dragging working state, the wheel seat locking mechanism 5 is in an unlocking state, and the front wheel assembly 21 and the rear wheel assembly 22 can rotate in a universal direction; when the carriage is in a pushing working state, the wheel seat locking mechanism 5 is in a locking state, the wheel seat 221 of the rear wheel assembly 22 cannot rotate universally relative to the carriage body 1, and only the front wheel assembly 21 has a universal rotation function, so that the carriage is convenient to steer when being pushed. When the towing rod 4 is switched from the opening state to the retracting state, the wheel seat locking mechanism 5 is driven to be switched from the unlocking state to the locking state.

As shown in fig. 15, 16, 21 and 22, the wheel-seat locking mechanism 5 includes a slide member provided on the carriage body 1 to slide relatively in the vertical direction, a first elastic member 513 for providing a force required for the slide member to slide upward, and a driving slider 531 provided on the carriage body 1 to slide. The sliding assembly comprises a locking pin 511 extending along the up-down direction, and a mounting sliding block 521 arranged on the carriage body 1 in a sliding manner along the up-down direction, wherein the axial lead of the locking pin 511 is parallel to the axial lead of the universal shaft, a locking groove 512 for matching with the locking pin 511 is arranged on the wheel seat 221, the locking pin 511 is arranged on the mounting sliding block 521 in a sliding manner along the up-down direction, and a second elastic member 523 for driving the locking pin 511 to move downwards to a required acting force is arranged between the mounting sliding block 521 and the locking pin 511.

As shown in fig. 15, 16, 21 and 22, the sliding direction of the driving slider 531 is perpendicular to the sliding direction of the mounting slider 521 and perpendicular to the sliding direction of the drawbar 4 with respect to the carriage body 1, specifically, the driving slider 531 slides in the left-right direction. The upper end of the mounting slider 521 is provided with a pushing inclined surface 522, the outer end of the driving slider 531 is provided with a driving inclined surface 532, the pushing inclined surface 522 is in mutual matching contact with the driving inclined surface 532, and a third elastic member 533 for driving the driving slider 531 to depart from the force required by the movement of the mounting slider 521 is further arranged between the carriage body 1 and the driving slider 531.

As shown in fig. 16 and 18, when the drawbar 4 is in the open state, the end 411 of the drawbar is located in the middle of the receiving slot 13, the inner end of the driving slider 531 is disengaged from the drawbar 4, the lock pin 511 is disengaged from the lock slot 512, and the wheel seat locking mechanism 5 is in the unlocked state; as shown in fig. 22 and 24, when the towing bar 4 is converted to the retracted state, the towing bar end 411 moves from front to back to the rear end of the receiving slot 13, the towing bar end 411 abuts against the inner end of the driving slider 531, and pushes the driving slider 531 to move toward the mounting slider 521, so as to press down the lock pin 511, when the wheel seat 221 rotates to make the lock pin 511 correspond to the position of the lock slot 512, the lock pin 511 is fittingly inserted into the lock slot 512 under the action of the second elastic member 523, and the wheel seat locking mechanism 5 is interlocked and locked.

As shown in fig. 18 and 24, the bottom of the receiving groove 13 is provided with a first positioning locking groove 413 and a second positioning locking groove 414 at intervals along the sliding direction of the drawbar 4, the first positioning locking groove 413 is located in front of the second positioning locking groove 414, and the drawbar end 411 is provided with a drawbar positioning pin 415 capable of sliding along the vertical direction and a fifth elastic element 412 for driving the drawbar positioning pin 415 to move toward the first positioning locking groove 413 or the second positioning locking groove 414. When the towing bar 4 is in the open state, the towing bar positioning pin 415 is fittingly inserted into the first positioning lock groove 413; when the tow bar 4 is in the stowed state, the tow bar positioning pin 415 is fittingly inserted into the second positioning locking groove 414. The towing bar 4 is further provided with an unlocking device for enabling the towing bar positioning pin 415 to exit the first positioning lock groove 413 or the second positioning lock groove 414, which may specifically adopt the prior art.

The specific use steps of the multifunctional carriage of the embodiment are as follows:

when the multi-functional planker shown in fig. 19 needs to be switched to a pushing operation state, the pushing assembly locking member 14 is unlocked, the pushing assembly 3 is pulled out backwards as shown in fig. 7, so that the rotating shaft of the push rod frame 31 extends out of the guide groove 11, the push rod frame 31 is rotated upwards, the seat 32 and the strut frame are unfolded as shown in fig. 4, the first locking mechanism and the second locking mechanism are locked synchronously, and the push rod frame 31 is unfolded along the length direction of the planker, so that the planker is switched to the pushing operation state as shown in fig. 1.

When the multifunctional carriage shown in fig. 19 needs to be switched to the towing operation state, the carriage is switched to the towing operation state shown in fig. 13 and can be grafted on the child cart 6 with different heights as shown in fig. 25 by first unlocking the towing bar positioning pin 415 and then pulling the towing bar 4 forward to the open state.

When the multifunctional carriage is not needed to be used, the steps are operated in a reverse direction, and the pushing assembly 3 and the towing rod 4 can be accommodated in the carriage body 1, as shown in fig. 19, so that the overall volume of the carriage is greatly reduced, and the carriage is convenient to accommodate and carry.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (10)

1. The utility model provides a multifunctional carriage, includes the carriage body, locates the wheel subassembly of carriage body bottom, its characterized in that: the carriage also comprises a pushing assembly, the pushing assembly comprises a push rod frame which can be folded along the length direction of the carriage, and a seat which can be opened or folded relative to the push rod frame, wherein the push rod frame can rotate relatively and can slide relatively along the front and back directions of the carriage body, the carriage is connected with the carriage body, the carriage has a dragging working state and a pushing working state, when the carriage is in the dragging working state, the push rod frame is folded along the length direction and is mutually folded with the seat, and the pushing assembly is folded at the bottom of the carriage body; when the carriage is in the pushing working state, the push rod frame is unfolded along the length direction of the carriage and gradually inclines upwards from back to front, and the seat is unfolded relative to the push rod frame and is positioned above the carriage body.

2. The multi-functional carriage as recited in claim 1, further comprising: one end of the seat is rotatably connected to the push rod frame, the pushing assembly further comprises a support rod frame which is used for supporting between the seat and the carriage body in the pushing working state, and when the carriage is in the pushing working state, the support rod frame is connected to the carriage body; when the carriage is in the dragging working state, the support rod frame is separated from the carriage body and mutually folded with the push rod frame and the seat.

3. The multi-functional carriage as recited in claim 2, further comprising: the support rod frame comprises an upper support rod and a lower support rod which extend in the vertical direction in the pushing working state, the lower end part of the upper support rod is detachably connected with the upper end part of the lower support rod, and when the carriage is in the pushing working state, the upper support rod and the lower support rod extend in the same vertical direction and are supported between the carriage body and the seat.

4. The multi-functional carriage as recited in claim 3, further comprising: the support rod frame further comprises an inclined support rod, one end of the inclined support rod is rotatably connected with the seat or the push rod frame, the other end of the inclined support rod is rotatably connected with the lower support rod, when the planker is in the dragging working state, the upper support rod and the lower support rod are mutually detached, the upper support rod is folded at the bottom of the seat, and the lower support rod and the inclined support rod are mutually folded at the bottom of the seat.

5. The multi-functional carriage as recited in claim 3, further comprising: a first locking mechanism for locking the upper support rod and the lower support rod relatively is arranged between the upper support rod and the lower support rod, a second locking mechanism for locking the lower support rod and the carriage body relatively is arranged between the lower support rod and the carriage body, and the first locking mechanism and the second locking mechanism are synchronously locked and/or are arranged in a linkage unlocking manner.

6. The multi-functional carriage as recited in claim 5, further comprising: the carriage body is provided with a mounting hole for the lower end part of the lower stay bar to be inserted in a matching way, the carriage body is also provided with a lock hole communicated with the mounting hole, the second locking mechanism comprises a linkage sliding block which is arranged on the lower stay bar in a sliding way along the length direction of the lower stay bar, and a lock tongue which is arranged at the lower end part of the lower stay bar in a sliding way along the length direction vertical to the lower stay bar, and an elastic part for providing acting force required by the movement of the lock tongue away from the lock hole, wherein wedge-shaped surfaces which are matched with each other are arranged between the lower part of the linkage sliding block and the lock tongue, the upper end part of the lower stay bar is provided with an insertion hole for the lower end part of the upper stay bar to be inserted in a matching way, when the lower end portion of the upper stay is inserted into the insertion hole and the first locking mechanism is locked, the linkage sliding block slides downwards and drives the lock tongue to be inserted into the lock hole in a matched mode.

7. The multi-functional carriage as recited in claim 1, further comprising: the bottom of the carriage body is provided with a guide groove which extends along the front-back direction and is used for providing sliding guide for the push rod frame, one end of the push rod frame is rotatably connected with a push rod joint through a rotating shaft, the push rod joint can be connected with the carriage body in a sliding manner along the extending direction of the guide groove, and when the carriage is in the dragging working state, the rotating shaft is positioned in the guide groove; when the carriage is in the pushing working state, the rotating shaft is positioned outside the guide groove.

8. The multi-functional carriage as recited in claim 7, further comprising: the push rod frame comprises two push rods which are parallel to each other and arranged at intervals, the seat is connected between the two push rods, and when the planker is in the dragging working state, the seat is folded between the two push rods.

9. The multi-functional carriage as claimed in any one of claims 1 to 8, wherein: the dragging plate further comprises a dragging rod, the dragging rod comprises a dragging rod end, a dragging rod body and a dragging connecting piece, one end of the dragging rod body is rotatably connected to the dragging rod end through a rotating shaft, the dragging connecting piece is arranged at the other end of the dragging rod body, an accommodating groove which extends in the front-back direction and is used for providing sliding guide for the dragging rod is formed in the dragging plate body, the dragging rod end is arranged in the accommodating groove in a sliding fit mode, and when the dragging plate is in the dragging working state, the dragging rod body and the rotating shaft are both positioned outside the accommodating groove; when the planker is in the pushing working state, the rod body of the towing rod and the rotating shaft are both positioned in the accommodating groove.

10. The multi-functional carriage as recited in claim 9, further comprising: the wheel assembly comprises a front wheel assembly arranged at the front part of the bottom of the carriage body and a rear wheel assembly arranged at the rear part of the bottom of the carriage body, wherein the rear wheel assembly comprises a wheel seat and a rear wheel arranged at the bottom of the wheel seat, the wheel seat is rotationally connected to the carriage body through a universal shaft, a wheel seat locking mechanism for locking the wheel seat and the carriage body relatively is arranged between the wheel seat and the carriage body, and when the carriage is in the dragging working state, the wheel seat locking mechanism is in an unlocking state; when the carriage is in the pushing working state, the wheel seat locking mechanism is in a locking state.

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