CN210912516U - Power-assisted carrier - Google Patents

Abstract

The utility model relates to the technical field of cargo handling, in particular to a power-assisted handling vehicle, which comprises a frame (1), wherein the frame (1) is a frame structure which is vertical to the ground and is longitudinally arranged; the front end of the both sides pole of frame (1) is equipped with first slide rail (5) and second slide rail (4) respectively, and this helping hand carrier still includes: the lifting device comprises a lifting bracket (6), an L-shaped rod frame (21), a locking mechanism and a control device with a traveling wheel; the utility model discloses a unique bionical transport design for the goods is unsettled to get on bus, and the device utilizes self gravity and lever principle to make the goods partly leave ground, and the mode of imitating manual operation is at the translation of goods bottom and is plugged in the roller board running gear, realizes that the goods is high-efficient, laborsaving to carry; the design of a pure mechanical mechanism is simple to operate, convenient to carry, stable and reliable; compared with the prior common auxiliary carrying tool, the utility model has the characteristics of low cost, can reduce the required cost of carrying goods by a wide margin.

Description

Power-assisted carrier

Technical Field

The utility model relates to a cargo handling technical field, in particular to helping hand carrier.

Background

In daily life, the goods are often carried, the weight of the goods is heavier, the volume of the goods is larger, the goods cannot be carried by a single person, and the goods are usually carried by a plurality of persons in a matched manner or by a small forklift, so that the goods are high in labor intensity, low in efficiency and easy to damage in the carrying process; the latter is labor saving, efficient, but costly and requires the carrier to have professional operating skills.

The most common cargo carrying mode at present is to adopt a small-sized carrying vehicle to carry, for example, application number 201721746698.7 discloses a power-assisted carrying vehicle, which mainly comprises a bearing plate, wherein two front wheels and two rear wheels are arranged at the bottom of the bearing plate, the front wheels and the rear wheels are respectively fixedly connected with front and rear wheel shafts, gears on the front and rear shafts are connected through chains, a handle is movably arranged on the rear wheel shaft, the cargo is carried on the carrying vehicle through manpower, and the carrying vehicle handle is pulled to carry the cargo, wherein the process that the cargo is carried from the ground to the carrying vehicle needs to be carried manually, certain labor intensity is needed, the efficiency is low, and labor-saving carrying cannot be completely realized; application patent No. 201820886238.3 discloses a "a multi-functional helping hand carrier", mainly include the vehicle bottom plate, there are two quarter butts on the vehicle bottom plate by preceding both sides, there are two L type poles with the vehicle bottom plate junction in the middle of the dolly, there are two parallel bars and two universal wheels in dolly front side and vehicle bottom plate junction, utilize lever principle simultaneously with the help of the outer edge of parallel bar blocking box container, put the goods on the dolly, with the power take off who helps DC motor again, realize helping hand transport, wherein utilize the parallel bar to block when the outer edge of box container, because the distance between the parallel bar is fixed, so there is strict restriction to the outer edge size of box container, very big limitation when using, consequently need a neotype helping hand carrier.

Disclosure of Invention

To the above problem, the utility model provides a power-assisted carrier realizes the stable centre gripping to the goods through the adaptation action bars of scalable "L" shape pole frame on the liftable support to the walking wheel of frame bottom is center of rotation, rotate to the operator direction through the handle with the frame, make the goods by inseparable centre gripping along with the rotation of frame and perk certain angle, then move up the link formula gyro wheel board parallel of running gear control end with the frame both sides and move to the goods bottom surface, put down the goods gently at last, make the goods arrange the car in completely, realize convenient, laborsaving transport to the goods.

The utility model aims at realizing through the following technical scheme:

a power-assisted carrier comprises a frame 1, wherein the frame 1 is a frame structure and is vertical to the ground and arranged along the longitudinal direction; the front ends of two side rods of the frame 1 are respectively provided with a first slide rail 5 and a second slide rail 4; this helping hand carrier still includes: a lifting bracket 6, an L-shaped rod frame 21, a locking mechanism and a control device with a traveling wheel;

the lifting support 6 is vertical to the frame 1 and arranged along the transverse direction; the two lifting supports 6 are respectively composed of a short side section vertically arranged at the inner side and a long side section horizontally arranged; the upper surfaces of the long side sections of the two lifting brackets 6 are respectively provided with a third slide rail 8 and a fourth slide rail 7, and the short side sections of the lifting brackets 6 are connected with the first slide rail 5 and the second slide rail 4 in a sliding manner through slide blocks;

the number of the L-shaped rod frames 21 is two, and each L-shaped rod frame comprises a long side section which is horizontally arranged and a short side section which is vertically arranged at the outer side and extends downwards; the lower surfaces of the long side sections of the two L-shaped rod frames 21 are respectively connected with the third slide rail 8 and the fourth slide rail 7 on the upper surface of the long side section of the lifting support 6 in a sliding manner through slide blocks; the upper surface of the long side section of the L-shaped rod frame 21 is provided with a rack 22; two ends of the push-pull handle 46 are respectively fixed at the inner ends of the long side sections of the two L-shaped rod frames 21;

the number of the locking mechanisms is two, and the two locking mechanisms are of symmetrical structures; each locking mechanism comprises a first cross-shaped support 11, a second cross-shaped support 12, a first support rod 20, a second support rod 19, a third support rod 18, a fourth support rod 17, a V-shaped rod 23, a cam 24, a first support seat 16, a second support seat 15, a third support seat 14 and a fourth support seat 13;

wherein, the long side section of the lifting bracket 6 is respectively provided with a first cross-shaped support 11 and a second cross-shaped support 12 which are vertical to the axial direction of the long side section;

a first supporting seat 16, a second supporting seat 15, a third supporting seat 14 and a fourth supporting seat 13 are respectively arranged on two sides of the joint of the first cross-shaped support 12, the second cross-shaped support 11 and the long edge section of the lifting support 6;

one end of the V-shaped rod 23 is a flat head, the other end of the V-shaped rod is a circular arc-shaped head, a hole is formed in the middle of the V-shaped rod 23, and the V-shaped rod 23 is hinged with a shaft between the first cross-shaped support 11 and the second cross-shaped support 12 through the hole in the middle;

one side of the arc-shaped head of the V-shaped rod 23 corresponds to the upper surface of the cam 24, the lower surface of the cam 24 is provided with a tooth groove, the tooth groove accommodates the rack 22 on the upper surface of the L-shaped rod frame 21, two side surfaces of the cam 24 are respectively and symmetrically provided with a first ring 28, a second ring 27, a third ring 26 and a fourth ring 25, the first ring 28, the second ring 27, the third ring 26 and the fourth ring 25 on the cam 24 are respectively connected with the first support rod 20, the second support rod 19, the third support rod 18 and the fourth support rod 17 in a sliding manner through four bearings, and a spring is fixedly arranged between each ring and the bottom of the corresponding support rod;

the upper surface of the cam 24 has a protrusion; in an unlocking state, one side of the protrusion, which is close to the arc-shaped head of the V-shaped rod 23, is an inwards concave curved surface, and one side of the protrusion, which is far away from the arc-shaped head of the V-shaped rod 23, is an outwards convex curved surface with smaller curvature and shorter stroke;

the control device with the traveling wheels comprises a first connecting rod type roller plate 29, a fifth supporting seat 30, a fifth optical axis 31, a second connecting rod type roller plate 32, a sixth supporting seat 33, a sixth optical axis 34, a third optical axis 37 and a fourth optical axis 38;

the bottom parts of the first connecting rod type roller plate 29 and the second connecting rod type roller plate 32 are provided with bearing wheels; the upper ends of the connecting rods of the first connecting rod type roller plate 29 and the second connecting rod type roller plate 32 are respectively fixedly connected with a fifth optical axis 31 and a sixth optical axis 34 through a fifth supporting seat 30 and a sixth supporting seat 33, a third optical axis 37 and a fourth optical axis 38 on a control device with traveling wheels are symmetrically and crossly arranged, the upper ends of the third optical axis 37 and the fourth optical axis 38 are respectively and fixedly installed on a first linear sliding block bearing 35 and a second linear sliding block bearing 36 through universal joints, the lower ends of the third optical axis 37 and the fourth optical axis 38 are respectively and fixedly installed at the inner ends of the fifth optical axis 31 and the sixth optical axis 34 through a first universal joint 39 and a second universal joint 40, the sixth optical axis 34 is in sliding connection with the machine frame through a third linear sliding block bearing 41, and the fifth optical axis 31 is in sliding connection with the machine frame 1 through a fourth linear sliding block bearing 42.

Handles 45 are fixedly arranged above the rear ends of the two side rods of the frame 1.

The rack 1 further comprises a first optical axis 3 and a second optical axis 2, and the first optical axis 3 and the second optical axis 2 are fixedly arranged at the rear ends of the two side rods of the rack 1 and are positioned below the handle 45; the first optical axis 3 and the second optical axis 2 are vertically arranged and are respectively parallel to the first slide rail 5 and the second slide rail 4;

the control device with the traveling wheels further comprises an operating handle 44, and two ends of the operating handle 44 are respectively connected with the first optical axis 3 and the second optical axis 2 on the rack 1 in a sliding mode through a first linear sliding block bearing 35 and a second linear sliding block bearing 36.

Two bearing wheels are respectively installed at the bottoms of the first link type roller plate 29 and the second link type roller plate 32.

The V-shaped rod 23 is a bent square steel pipe.

The bottom of the frame 1 is provided with a travelling wheel 43.

The beneficial effects of the utility model reside in that:

1. the utility model discloses a unique bionical transport design for the goods is unsettled to get on bus, and the device utilizes self gravity and lever principle to make the goods partly leave ground, and the mode of imitating manual operation is at the translation of goods bottom and is plugged in the roller board running gear, realizes that the goods is high-efficient, laborsaving to carry;

2. the design of a pure mechanical mechanism is simple to operate, convenient to carry, stable and reliable;

3. compared with the prior common auxiliary carrying tool, the utility model has the characteristics of low cost, can reduce the required cost of carrying goods by a wide margin.

Drawings

Fig. 1 is a first schematic view of the overall structure of the present invention;

FIG. 2 is a second schematic view of the overall structure of the present invention;

fig. 3 is a front view of the overall structure of the present invention;

FIG. 4 is a schematic view of the structure of the retractable "L" -shaped bar frame of the present invention;

fig. 5 is a schematic view of the connection between the lifting bracket and the L-shaped rod frame support of the present invention.

Reference numerals:

1 frame 2 second optical axis

3 first optical axis 4 second slide rail

5 first slide rail 6 lifting support

7 fourth slide rail 8 third slide rail

11 a first cross-shaped support 12 and a second cross-shaped support

13 fourth support seat 14 third support seat

15 second support base 16 first support base

17 fourth strut 18 third strut

19 second strut 20 first strut

21 'L' shaped bar frame 22 rack

23 'V' shaped lever 24 cam

25 fourth ring 26 third ring

27 second ring 28 first ring

29 fifth support seat of first link type roller plate 30

31 fifth optical axis 32 second link type roller plate

33 sixth support 34 sixth optical axis

35 first linear slider bearing 36 second linear slider bearing

37 third optical axis 38 fourth optical axis

39 first gimbal 40 second gimbal

41 third linear slide bearing 42 fourth linear slide bearing

43 operating handle for road wheel 44

45 handle 46 push-pull handle

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples.

As shown in fig. 1 to 5, the power-assisted guided vehicle includes a frame 1, a liftable support 6, an "L" -shaped bar frame 21, a locking mechanism, and a running wheel control device.

The frame 1 comprises a travelling wheel 43, a handle 45, a first slide rail 5, a second slide rail 4, a first optical axis 3 and a second optical axis 2.

The frame 1 is a frame structure which is arranged in a longitudinal direction perpendicular to the ground. The front ends of the two side rods of the frame 1 are respectively provided with a first slide rail 5 and a second slide rail 4. Handles 45 are fixedly arranged above the rear ends of the two side rods of the frame 1, and travelling wheels 43 are arranged at the bottom of the frame 1. The first optical axis 3 and the second optical axis 2 are fixedly arranged at the rear ends of the two side rods of the frame 1 and are positioned below the handle 45. The first optical axis 3 and the second optical axis 2 are vertically arranged and are respectively parallel to the first slide rail 5 and the second slide rail 4.

The liftable bracket 6 is perpendicular to the frame 1 and arranged along the transverse direction. The two lifting supports 6 respectively comprise a short side section vertically arranged on the inner side and a long side section horizontally arranged. The upper surfaces of the long side sections of the two lifting brackets 6 are respectively provided with a third slide rail 8 and a fourth slide rail 7. The short edge section of the lifting support 6 is connected with the first slide rail 5 and the second slide rail 4 in a sliding manner through the slide block.

The two L-shaped bar frames 21 respectively comprise a long side section which is horizontally arranged and a short side section which is vertically arranged at the outer side and extends downwards. The lower surfaces of the long side sections of the two L-shaped rod frames 21 are respectively connected with the third slide rail 8 and the fourth slide rail 7 on the upper surface of the long side section of the lifting support 6 in a sliding manner through slide blocks. The upper surface of the long side section of the L-shaped bar frame 21 is provided with a rack 22. Two ends of the push-pull handle 46 are respectively fixed at the inner ends of the long side sections of the two L-shaped bar frames 21.

The locking mechanism is used for locking the two lifting brackets 6 and the L-shaped bar frame 21 sliding on the lifting brackets. The number of the locking mechanisms is two, and the two locking mechanisms are of symmetrical structures. Each locking mechanism comprises a first cross-shaped support 11, a second cross-shaped support 12, a first support rod 20, a second support rod 19, a third support rod 18, a fourth support rod 17, a V-shaped rod 23, a cam 24, a first support seat 16, a second support seat 15, a third support seat 14 and a fourth support seat 13.

Wherein, the long side section of the lifting bracket 6 is respectively provided with a first cross-shaped support 11 and a second cross-shaped support 12 which are vertical to the axial direction of the long side section.

A first supporting seat 16, a second supporting seat 15, a third supporting seat 14 and a fourth supporting seat 13 are respectively arranged on two sides of the joint of the first cross-shaped support 12, the second cross-shaped support 11 and the long edge section of the lifting support 6.

The V-shaped rod 23 is a bent square steel pipe, one end of the V-shaped rod is a flat head, the other end of the V-shaped rod is processed into an arc-shaped head, a hole is formed in the middle of the V-shaped rod, and the V-shaped rod 23 is hinged with a shaft between the first cross-shaped support 11 and the second cross-shaped support 12 through the hole in the middle of the V-shaped rod.

The circular arc head side of the "V" shaped lever 23 corresponds to the upper surface of the cam 24. The lower surface of the cam 24 is provided with a toothed groove which receives the toothed rack 22 on the upper surface of the "L" shaped bar frame 21. Two side surfaces of the cam 24 are respectively symmetrically provided with a first circular ring 28, a second circular ring 27, a third circular ring 26 and a fourth circular ring 25, the first circular ring 28, the second circular ring 27, the third circular ring 26 and the fourth circular ring 25 on the cam 24 are respectively in sliding connection with the first supporting rod 20, the second supporting rod 19, the third supporting rod 18 and the fourth supporting rod 17 through four bearings, and a spring is fixedly installed between each circular ring and the bottom of the corresponding supporting rod.

The upper surface of the cam 24 has a protrusion. In the unlocking state, one side of the protrusion close to the arc-shaped head of the V-shaped rod 23 is an inwards concave curved surface, and one side of the protrusion far away from the arc-shaped head of the V-shaped rod 23 is an outwards convex curved surface with smaller curvature and shorter stroke.

When the V-shaped rod 23 is pushed, the V-shaped rod 23 slides along the inner concave curved surface to the highest point from one side of the inner concave curved surface, and continues to move forward along the outer convex curved surface after passing through the highest point, at the moment, the direction of the force of the outer convex curved surface to the V-shaped rod 23 cannot enable the V-shaped rod 23 to move back, and self-locking is achieved.

The cam 24 moves downwards under the pressure of the arc head of the V-shaped rod 23, so that the tooth grooves of the cam 24 are meshed with the rack 22 on the upper surface of the L-shaped rod frame 21 to realize locking, and meanwhile, the first circular ring 28, the second circular ring 27, the third circular ring 26 and the fourth circular ring 25 press the spring downwards.

When it is desired to unlock, the operator rotates the "V" bar 23 in the reverse direction. When the arc-shaped head of the V-shaped rod 23 enters the concave curved surface on the upper surface of the cam 24, the first ring 28, the second ring 27, the third ring 26 and the fourth ring 25 move upwards due to the spring force, the cam 24 is driven to move upwards, the tooth grooves of the cam 24 are separated from the rack 22 on the upper surface of the L-shaped rod frame 21, and unlocking is achieved.

The road wheel control device comprises a first connecting rod type roller plate 29, a fifth supporting seat 30, a fifth optical axis 31, a second connecting rod type roller plate 32, a sixth supporting seat 33, a sixth optical axis 34, a third optical axis 37, a fourth optical axis 38 and an operating handle 44.

The bottom of the first connecting rod type roller plate 29 and the second connecting rod type roller plate 32 are provided with bearing wheels. Preferably, two load wheels are mounted on the bottom of each of the first and second linked roller plates 29, 32. The upper ends of the connecting rods of the first connecting rod type roller plate 29 and the second connecting rod type roller plate 32 are fixedly connected with the fifth optical axis 31 and the sixth optical axis 34 through a fifth supporting seat 30 and a sixth supporting seat 33 respectively. The two ends of the operating handle 44 with the traveling wheel control device are respectively connected with the first optical axis 3 and the second optical axis 2 on the frame 1 in a sliding manner through the first linear slider bearing 35 and the second linear slider bearing 36. The third optical axis 37 and the fourth optical axis 38 on the control device with the traveling wheels are symmetrically arranged in a crossed manner, the upper ends of the third optical axis 37 and the fourth optical axis 38 are fixedly mounted on the first linear sliding block bearing 35 and the second linear sliding block bearing 36 through universal joints respectively, the lower ends of the third optical axis 37 and the fourth optical axis 38 are fixedly mounted at the inner ends of the fifth optical axis 31 and the sixth optical axis 34 through the first universal joint 39 and the second universal joint 40 respectively, the sixth optical axis 34 is connected with the machine frame in a sliding manner through the third linear sliding block bearing 41, and the fifth optical axis 31 is connected with the machine frame 1 in a sliding manner through the fourth linear sliding block bearing 42.

The utility model discloses a working process does:

in the initial position, the liftable support 6 is at the bottom ends of the first slide rail 5 and the second slide rail 4 due to its gravity, the operating handle 44 with the traveling wheel control device is at the bottom ends of the first optical axis 3 and the second optical axis 2, and the "L" -shaped bar frame 21 is at its innermost position.

Firstly, the operator lifts the lifting bracket 6 to the high position of the first slide rail 5 and the second slide rail 4.

The operator holds the handle 45 on the frame and pushes the frame 1 in the direction of the load until it is pressed against the load. At the moment, one hand pushes a push-pull handle 46 of the telescopic L-shaped rod frame 21 outwards to enable the L-shaped rod frame 21 to extend towards the direction of the goods, then the lifting support 6 is pushed downwards to be completely attached to the upper surface of the goods, and then the telescopic L-shaped rod frame 21 is pulled inwards to be completely attached to the front surface of the goods, so that the goods are tightly attached to the device. At this moment, the two V-shaped rods 23 are respectively rotated to enable the arcs at the lower ends of the two V-shaped rods to be respectively meshed with the cam surfaces of the cams 24, when the cams rotate to the convex curved surface part of the cams 24 through the highest point, the cams 24 can overcome the action of a spring to move downwards along with the rotation of the V-shaped rods 23, tooth grooves at the lower ends of the cams are meshed with the racks 22 on the L-shaped rod frames 21 to realize locking, the telescopic L-shaped rod frames 21 are rigidly positioned to realize rigid and tight clamping on goods, then the handle 45 of the rack 1 is rotated towards the direction of an operator by taking the travelling wheels 43 at the bottom of the rack 1 as a rotation center to enable the rack 1 to rotate around the rotation center to pry the goods, when the bottom of the goods forms a certain angle with the ground, the operating handle 44 with the travelling wheel control device is operated to move upwards, at this moment, the included angle between the third optical axis 37 and the fourth optical axis 38 is reduced, and, And the sixth optical axis 34 is enabled to move in opposite directions, so that the first connecting rod type roller plate 29 and the second connecting rod type roller plate 32 move to the bottom surface of the goods in parallel, and finally the goods are slowly flatly placed on the roller plates, and the goods are convenient and labor-saving to carry.

Claims (6)

1. A power-assisted carrier comprises a frame (1), wherein the frame (1) is of a frame structure and is vertical to the ground and arranged along the longitudinal direction; the front ends of two side rods of the frame (1) are respectively provided with a first slide rail (5) and a second slide rail (4); the method is characterized in that:

this helping hand carrier still includes: the lifting device comprises a lifting bracket (6), an L-shaped rod frame (21), a locking mechanism and a control device with a traveling wheel;

the lifting support (6) is vertical to the rack (1) and arranged along the transverse direction; the two lifting supports (6) respectively comprise a short side section which is vertically arranged on the inner side and a long side section which is horizontally arranged; the upper surfaces of the long side sections of the two lifting supports (6) are respectively provided with a third slide rail (8) and a fourth slide rail (7), and the short side sections of the lifting supports (6) are in sliding connection with the first slide rail (5) and the second slide rail (4) through slide blocks;

the number of the L-shaped rod frames (21) is two, and the two L-shaped rod frames respectively comprise a long side section which is horizontally arranged and a short side section which is vertically arranged at the outer side and extends downwards; the lower surfaces of the long side sections of the two L-shaped rod frames (21) are respectively connected with a third slide rail (8) and a fourth slide rail (7) on the upper surface of the long side section of the lifting support (6) in a sliding manner through slide blocks; the upper surface of the long side section of the L-shaped rod frame (21) is provided with a rack (22); two ends of the push-pull handle (46) are respectively fixed at the inner ends of the long side sections of the two L-shaped rod frames (21);

the number of the locking mechanisms is two, and the two locking mechanisms are of symmetrical structures; each locking mechanism comprises a first cross-shaped support (11), a second cross-shaped support (12), a first support rod (20), a second support rod (19), a third support rod (18), a fourth support rod (17), a V-shaped rod (23), a cam (24), a first support seat (16), a second support seat (15), a third support seat (14) and a fourth support seat (13);

wherein, a first cross-shaped support (11) and a second cross-shaped support (12) which are vertical to the axial direction of the long side section are respectively arranged on the long side section of the lifting support (6);

a first supporting seat (16), a second supporting seat (15), a third supporting seat (14) and a fourth supporting seat (13) are respectively arranged on two sides of the joint of the first cross-shaped support (11), the second cross-shaped support (12) and the long edge section of the lifting support (6);

one end of the V-shaped rod (23) is a flat head, the other end of the V-shaped rod is a circular arc-shaped head, a hole is formed in the middle of the V-shaped rod, and the V-shaped rod (23) is hinged with a shaft between the first cross-shaped support (11) and the second cross-shaped support (12) through the hole in the middle;

one side of the arc-shaped head of the V-shaped rod (23) corresponds to the upper surface of the cam (24), a tooth groove is formed in the lower surface of the cam (24), the tooth groove accommodates a rack (22) on the upper surface of the L-shaped rod frame (21), a first ring (28), a second ring (27), a third ring (26) and a fourth ring (25) are symmetrically arranged on two side surfaces of the cam (24), the first ring (28), the second ring (27), the third ring (26) and the fourth ring (25) on the cam (24) are respectively in sliding connection with the first supporting rod (20), the second supporting rod (19), the third supporting rod (18) and the fourth supporting rod (17) through four bearings, and a spring is fixedly installed between each ring and the bottom of the corresponding supporting rod;

the upper surface of the cam (24) is provided with a protrusion; when the lock is in an unlocking state, one side of the protrusion, which is close to the arc-shaped head of the V-shaped rod (23), is an inwards concave curved surface, and one side of the protrusion, which is far away from the arc-shaped head of the V-shaped rod (23), is an outwards convex curved surface with smaller curvature and shorter stroke;

the control device with the traveling wheels comprises a first connecting rod type roller plate (29), a fifth supporting seat (30), a fifth optical axis (31), a second connecting rod type roller plate (32), a sixth supporting seat (33), a sixth optical axis (34), a third optical axis (37) and a fourth optical axis (38);

the bottom parts of the first connecting rod type roller plate (29) and the second connecting rod type roller plate (32) are provided with bearing wheels; the upper ends of the connecting rods of the first connecting rod type roller plate (29) and the second connecting rod type roller plate (32) are respectively fixedly connected with the fifth optical axis (31) and the sixth optical axis (34) through a fifth supporting seat (30) and a sixth supporting seat (33), third optical axis (37) and fourth optical axis (38) on the control device with the traveling wheels are symmetrically and crossly arranged, the upper ends of the third optical axis (37) and the fourth optical axis (38) are fixedly mounted on a first linear sliding block bearing (35) and a second linear sliding block bearing (36) through universal joints respectively, the lower ends of the third optical axis (37) and the fourth optical axis (38) are fixedly mounted at the inner ends of a fifth optical axis (31) and a sixth optical axis (34) through a first universal joint (39) and a second universal joint (40) respectively, the sixth optical axis (34) is connected with a rack in a sliding mode through a third linear sliding block bearing (41), and the fifth optical axis (31) is connected with the rack (1) in a sliding mode through a fourth linear sliding block bearing (42).

2. The power-assisted cart of claim 1, wherein: handles (45) are fixedly arranged above the rear ends of the two side rods of the frame (1).

3. The power-assisted cart of claim 2, wherein:

the rack (1) further comprises a first optical axis (3) and a second optical axis (2), and the first optical axis (3) and the second optical axis (2) are fixedly arranged at the rear ends of the two side rods of the rack (1) and are positioned below the handle (45); the first optical axis (3) and the second optical axis (2) are vertically arranged and are respectively parallel to the first sliding rail (5) and the second sliding rail (4);

the control device with the traveling wheels further comprises an operating handle (44), and two ends of the operating handle (44) are connected with the first optical axis (3) and the second optical axis (2) on the rack (1) in a sliding mode through a first linear sliding block bearing (35) and a second linear sliding block bearing (36) respectively.

4. The power-assisted cart of claim 1, wherein:

two bearing wheels are respectively arranged at the bottoms of the first connecting rod type roller plate (29) and the second connecting rod type roller plate (32).

5. The power-assisted cart of claim 1, wherein: the V-shaped rod (23) is a bent square steel pipe.

6. The power-assisted cart of claim 1, wherein: the bottom of the frame (1) is provided with a travelling wheel (43).

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