CN220483381U - Cargo transport trolley convenient to go upstairs - Google Patents

Abstract

A cargo transport trolley convenient for going upstairs comprises a trolley frame, wheels arranged below the rear side of the trolley frame and a supporting frame which is convexly arranged at the rear side of the trolley frame and positioned at the inner sides of the two wheels; the rear surface of the support frame is a supporting surface for assisting the wheels to climb stairs, the supporting surface is arranged up and down, and the distance between the supporting surface and the frame in the front-rear direction is gradually increased or equal from top to bottom; the height of the lower end of the supporting surface from the ground is smaller than that of the upper surface of the wheel from the ground, and the distance between the lower end of the supporting surface and the frame in the front-rear direction is smaller than that between the rear surface of the wheel and the frame in the front-rear direction. In the process of not influencing the normal rolling of the wheels, the outer edges of the wheels are smoothly connected with the supporting surface in the process of ascending stairs, the sliding process between the supporting surface and the intersecting line is smoothly transited to the rolling process between the wheels and the intersecting line, and the trolley in the scheme is more labor-saving and convenient in the process of ascending stairs.

Description

Cargo transport trolley convenient to go upstairs

Technical Field

The utility model relates to the technical field of freight transportation, in particular to a freight handcart convenient to go upstairs.

Background

The handcart is a vehicle for carrying materials, and has the advantages of low cost, convenient operation, light dead weight and the like, so that the handcart has wide application in carrying articles in a short distance and can carry articles in a short distance in places where motor vehicles cannot be used.

The existing handcart generally comprises a frame, a handle arranged above the frame and wheels arranged below the frame, when the handcart is used, the frame is in an inclined state, cargoes are placed on the frame, the weight of the cargoes is transferred to the wheels, and the handle is pulled forwards to carry the cargoes to a destination. If the ground is flat in the carrying process, the carrying is convenient and labor-saving, but the goods are carried to the building, particularly under the condition of heavier goods, wheels can be clamped between the horizontal plane and the vertical plane of the stairs in the upstairs process, great effort is required to pull the goods and the trolley from the lower stairs to the upper stairs, and the higher the floors, the more the number of the stairs, the larger the labor load born in the carrying process.

Therefore, how to solve the above-mentioned drawbacks of the prior art is a subject to be studied and solved by the present utility model.

Disclosure of Invention

The utility model aims to provide a cargo trolley which is convenient to go upstairs.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a cargo transport trolley convenient for going upstairs comprises a trolley frame, wheels arranged below the rear side of the trolley frame and a supporting frame which is convexly arranged at the rear side of the trolley frame and positioned at the inner sides of the two wheels;

the rear surface of the support frame is a supporting surface for assisting the wheels to climb stairs, the supporting surface is arranged up and down, and the distance between the supporting surface and the frame in the front-rear direction is gradually increased or equal from top to bottom; the height of the lower end of the supporting surface from the ground is smaller than that of the upper surface of the wheel from the ground, and the distance between the lower end of the supporting surface and the frame in the front-rear direction is smaller than that between the rear surface of the wheel and the frame in the front-rear direction.

In the scheme, the trolley is pulled upwards in the process of going upstairs of the trolley, the supporting surface of the supporting frame is abutted against and in sliding contact with the intersecting line of the horizontal plane and the vertical plane of the stair step, the height of the lower end of the supporting surface from the ground is smaller than that of the upper surface of the wheel, the distance between the lower end of the supporting surface and the frame in the front-back direction is smaller than that between the rear surface of the wheel and the frame in the front-back direction, the outer edge of the wheel and the supporting surface are smoothly connected in the process of going upstairs without affecting the normal rolling of the wheel, and the sliding process between the supporting surface and the intersecting line is smoothly transited to the rolling process between the wheel and the intersecting line.

In the scheme, the supporting surface can be an anti-collision surface made of nylon materials, because the cart is generally made of aluminum alloy materials, the stairs are generally made of cement materials, and the two materials are in sliding friction, so that the friction coefficient is high, labor is wasted, and abrasion and damage to the supporting surface can be caused.

According to the further technical scheme, an included angle beta is formed between the supporting surface and the plane where the frame is located, beta is more than or equal to 0 degree and less than or equal to 45 degrees, and through repeated tests, the angle range is more labor-saving when the cart is pulled upwards.

According to a further technical scheme, the support frame is in a backward concave inverted U shape and comprises an integrally formed upper connecting rod, a support rod and a lower connecting rod, the upper end of the upper connecting rod is connected with the frame, the lower end of the upper connecting rod is connected with the upper end of the support rod, the lower end of the support rod is connected with the upper end of the lower connecting rod, and the lower end of the lower connecting rod is connected with the frame; the rear surface of the supporting rod is the supporting surface. The design of the structure of the support frame not only saves the consumption of sectional materials and reduces the cost of the cart, but also makes the cart lighter.

According to a further technical scheme, the support frames are provided with a pair of support frames, and the two support frames are respectively positioned on the left and right pillars of the frame. The supporting surface and the intersecting line are stressed more uniformly and stably in the sliding process, the trolley cannot shake left and right, and the stability of the trolley in the stair climbing process is improved.

Further technical scheme, the shallow still includes two reinforcing bars that are used for fixed axle of two wheels, and the front end of two reinforcing bars respectively with frame fixed connection, the rear end respectively with control support frame fixed connection, the fixed axle runs through two reinforcing bars from control direction. In the use of the cart, the total weight of the cart and cargoes is finally transferred to the two wheels, and the fixed shafts of the wheels are arranged on the reinforcing rods fixedly connected with the supporting frames, so that the bearing capacity and stability of the fixed shafts are increased, and the overall structural strength of the cart is improved.

Further technical scheme, the length of frame post is adjustable setting, can adjust the length of post like this in-process of going upstairs, reaches laborsaving convenient requirement, in addition to this, the user can also adjust the post to suitable length at will according to height, operating habit and goods length.

According to a further technical scheme, the vehicle column comprises a hollow lower vehicle column, an upper vehicle column inserted in the lower vehicle column and an elastic locking piece for locking the upper vehicle column on the lower vehicle column; a positioning hole is formed in the lower vehicle column; the upper column is provided with a plurality of locking holes distributed along the length direction of the column; the elastic locking piece is connected to the lower vehicle column, and in a locking state, the elastic locking piece stretches into any locking hole on the upper vehicle column through a positioning hole on the lower vehicle column.

According to a further technical scheme, the elastic locking piece comprises a locking needle and a spring sleeved on the locking needle, one end of the spring is propped against and positioned on the locking needle, the other end of the spring is propped against and positioned on a positioning seat, and the positioning seat is fixed relative to the lower vehicle column; the front end of the lock needle is provided with a locking head, and the locking head is arranged corresponding to the positioning hole and the locking hole; and a traction handle is arranged in the middle of the lock needle and drives the lock needle to retract outwards so as to unlock the lock on the locking hole.

According to a further technical scheme, a plastic piece is fixedly arranged at the lower end of the upper vehicle column, and the outer diameter of the plastic piece is slightly smaller than the inner diameter of the lower vehicle column; the vehicle column further comprises a sleeve sleeved outside the upper vehicle column Zhou Juka and arranged in the lower vehicle column, the inner diameter of the sleeve is smaller than the outer diameter of the plastic part, and the inner diameter of the sleeve is larger than the outer diameter of the upper vehicle column. During installation, because the handlebar and the upper column are in screw connection, the sleeve is sleeved on the upper column firstly and then the handlebar is installed, then the upper column is downwards inserted into the lower column, and then the sleeve is downwards clamped into the lower column, so that the upper column only slides and rubs with the inner wall of the lower column due to the punctiform bulge at the outer edge of the plastic part in the process of moving up and down in the lower column, and the large-area sliding and rubbing between the outer wall of the upper column and the inner wall of the lower column is avoided, so that the upper column is more time-saving and labor-saving in the process of up-down displacement. The setting of working of plastics has reduced the clearance between last car post outer wall and the lower car post inner wall, avoids the too big condition that leads to the car post to rock in the two clearance, increases the holistic stability of shallow.

According to a further technical scheme, a foldable supporting plate is further arranged below the cart, and when the supporting plate is in an open state, the supporting plate is turned down to be perpendicular to the frame; when folding, the frame is turned upwards and attached to the frame. Reduce the accommodation space that occupies under the state of accomodating, be convenient for accomodate.

According to a further technical scheme, the frame is further provided with a plurality of backward concave crosspieces, and each crosspiece is fixedly arranged between the left column and the right column of the frame. The backward concave crosspieces increase the convenience of loading cargoes on the one hand and increase the accommodation space of the frame on the other hand.

Compared with the prior art, the utility model has the following advantages:

in the scheme, through the setting of the supporting surface, in the process of going upstairs of the trolley, the horizontal plane of supporting surface and step and the intersection line of facade are propped against and sliding contact, and the height of the lower end of the supporting surface from the ground is less than the height of the upper surface of the wheel from the ground, the distance between the lower end of the supporting surface and the frame in the front-back direction is less than the distance between the rear surface of the wheel and the frame in the front-back direction, the outer edge of the wheel and the supporting surface are smoothly connected in the process of going upstairs without influencing the normal rolling of the wheel, the sliding process between the supporting surface and the intersection line is smoothly transited to the rolling process between the wheel and the intersection line, and compared with the prior art, the trolley in the scheme is more labor-saving and convenient in the process of going upstairs.

Drawings

FIG. 1 is an exploded view of a cart according to an embodiment of the present utility model;

FIG. 2 is an enlarged view at A of FIG. 1;

FIG. 3 is an enlarged view of FIG. 1 at B;

FIG. 4 is a schematic diagram showing a cart going up stairs in a side view according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram of a cart in a rear side view according to an embodiment of the present utility model;

fig. 6 is a schematic structural view of an elastic locking member according to an embodiment of the present utility model.

In the above figures: 1. a wheel; 2. a support frame; 2a, an upper connecting rod; 2b, supporting rods; 2c, a lower connecting rod; 3. a support surface; 4. a column is carried out; 4a, loading a vehicle column; 4b, getting off the column; 5. a reinforcing rod; 6. a fixed shaft; 7. positioning holes; 8. a locking hole; 9. locking the needle; 10. a spring; 11. a positioning seat; 12. a traction handle; 13. a plastic member; 14. a sleeve; 15. a supporting plate; 16. a crosspiece.

Description of the embodiments

The utility model is further described below with reference to the accompanying drawings and examples:

examples: the present utility model will be described in detail with reference to the drawings, wherein modifications and variations are possible in light of the teachings of the present utility model, without departing from the spirit and scope of the present utility model, as will be apparent to those of skill in the art upon understanding the embodiments of the present utility model.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. Singular forms such as "a," "an," "the," and "the" are intended to include the plural forms as well, as used herein.

As used herein, "connected" or "positioned" may refer to two or more components or devices in physical contact with each other, or indirectly, or in operation or action with each other.

As used herein, the terms "comprising," "having," and the like are all open-ended terms that mean including, but not limited to.

The term (terms) as used herein generally has the ordinary meaning of each term as used in this field, in this disclosure, and in the special context, unless otherwise noted. Certain terms used to describe the present disclosure are discussed below, or elsewhere in this specification, to provide additional guidance to those skilled in the art in connection with the description herein.

The terms "front", "rear", "upper", "lower", "left", "right" and the like used herein are directional terms, and are merely used to describe positional relationships among the structures in the present application, and are not intended to limit the present protection scheme and the specific direction in actual implementation.

Referring to fig. 1-6, a cargo cart for going up stairs comprises a frame, wheels 1 arranged below the rear side of the frame, and a supporting frame 2 arranged on the rear side of the frame in a protruding manner and positioned on the inner sides of the wheels 1.

The rear surface of the support frame 2 is a support surface 3 for assisting the wheel 1 to climb stairs, the support surface 3 is arranged up and down, and the distance between the support surface 3 and the frame in the front-rear direction is gradually increased or equal from top to bottom; wherein, the supporting surface 3 and the plane where the frame is positioned form an included angle beta which is more than or equal to 0 degree and less than or equal to 45 degrees. The height of the lower end of the supporting surface 3 from the ground is smaller than that of the upper surface of the wheel 1, and the distance between the lower end of the supporting surface 3 and the frame in the front-rear direction is smaller than that between the rear surface of the wheel 1 and the frame in the front-rear direction.

The support frame 2 is in a backward concave inverted U shape and comprises an upper connecting rod 2a, a support rod 2b and a lower connecting rod 2c which are integrally formed, the upper end of the upper connecting rod 2a is connected with a frame, the lower end of the upper connecting rod 2a is connected with the upper end of the support rod 2b, the lower end of the support rod 2b is connected with the upper end of the lower connecting rod 2c, and the lower end of the lower connecting rod 2c is connected with the frame; wherein the rear surface of the support bar 2b is the support surface 3. In order to increase the stability of the cart and avoid unstable operation in the ascending stair process, the support frames 2 are provided with a pair of support frames, and the two support frames 2 are respectively positioned on the left column 4 and the right column 4 of the frame.

The cart further comprises two reinforcing rods 5 for fixing the fixed shafts 6 of the two wheels 1, the front ends of the two reinforcing rods 5 are respectively fixedly connected with the frame, the rear ends of the two reinforcing rods are respectively fixedly connected with the left and right supporting frames 2, the fixed shafts 6 penetrate through the two reinforcing rods 5 from the left and right directions, so that the bearing capacity of the fixed shafts 6 can be enhanced, and the overall structural strength of the cart is improved.

The length of the frame column 4 is adjustable. Specifically, the pillar 4 includes a hollow lower pillar 4b, an upper pillar 4a inserted into the lower pillar 4b, and an elastic locking member for locking the upper pillar 4a to the lower pillar 4 b; a positioning hole 7 is formed in the lower column 4 b; the upper column 4a is provided with a plurality of locking holes 8 which are distributed along the length direction of the column 4; the elastic locking piece is connected to the lower column 4b, and in the locked state, the elastic locking piece extends into any locking hole 8 on the upper column 4a through a positioning hole 7 on the lower column 4b. In order to enable the length adjustment process of the upper and lower vehicle pillars to be smoother, a plastic piece 13 is fixedly arranged at the lower end of the upper vehicle pillar 4a, and the outer diameter of the plastic piece 13 is slightly smaller than the inner diameter of the lower vehicle pillar 4 b; the pillar 4 further comprises a sleeve 14 arranged outside the upper pillar 4a and inside the lower pillar 4b, wherein the inner diameter of the sleeve 14 is smaller than the outer diameter of the plastic part 13, and the inner diameter of the sleeve 14 is larger than the outer diameter of the upper pillar 4a. In the process that the upper column 4a moves up and down in the lower column 4b, only the outer edge point-shaped protrusions of the plastic piece 13 slide against the inner wall of the lower column 4b, so that large-area sliding friction between the outer wall of the upper column 4a and the inner wall of the lower column 4b is avoided, and the upper column 4a is more time-saving and labor-saving in the process of up-down displacement.

The elastic locking piece is provided with a pair of elastic locking pieces which are respectively arranged corresponding to the left and right bicycle posts 4. The elastic locking piece comprises a lock needle 9 and a spring 10 sleeved on the lock needle 9, one end of the spring 10 is propped against and positioned on the lock needle 9, the other end is propped against and positioned on a positioning seat 11, and the positioning seat 11 is fixed relative to the lower vehicle column 4 b; the front end of the lock needle 9 is provided with a locking head, and the locking head is arranged corresponding to the positioning hole 7 and the locking hole 8; the middle part of lock needle 9 is equipped with traction handle 12, and this traction handle 12 drive lock needle 9 outwards contracts to realize lock needle 9 to the unblock of locking hole 8, can upwards pull or draw down and move last car post 4b after the unblock, make it be adjusted to the required height, then with last car post 4b on corresponding locking hole 8 with lower car post 4b locating hole 7 counterpoint cooperation, loosen traction handle 12 and make the locking head of lock needle 9 insert in locating hole 7 and the locking hole 8 simultaneously, realize the locking to upper and lower car post.

A foldable supporting plate 15 is arranged below the cart, and the supporting plate 15 is turned downwards to be vertical to the frame when in an open state; when folding, the frame is turned upwards and attached to the frame.

The left and right pillars 4 of the frame are further provided with a plurality of threading holes (not shown in the figure), and each threading hole is arranged along the length direction of the pillar 4.

The frame is also provided with a plurality of rails 17 which are recessed backwards, and each rail 17 is fixedly arranged between the left column 4 and the right column 4 of the frame.

The above embodiments are provided to illustrate the technical concept and features of the present utility model and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.

Claims (11)

1. Cargo trolley convenient to go upstairs, its characterized in that: comprises a frame, wheels (1) arranged below the rear side of the frame, and a supporting frame (2) which is convexly arranged at the rear side of the frame and positioned at the inner sides of the two wheels (1);

the rear surface of the supporting frame (2) is a supporting surface (3) for assisting the wheel (1) to climb stairs, the supporting surface (3) is arranged up and down, and the distance between the supporting surface (3) and the frame in the front-rear direction is gradually increased or equal from top to bottom; the height of the lower end of the supporting surface (3) from the ground is smaller than that of the upper surface of the wheel (1) from the ground, and the distance between the lower end of the supporting surface (3) and the frame in the front-rear direction is smaller than that between the rear surface of the wheel (1) and the frame in the front-rear direction.

2. The easy-to-go cargo cart of claim 1, wherein: an included angle beta is formed between the supporting surface (3) and the plane where the frame is located, and beta is more than or equal to 0 degree and less than or equal to 45 degrees.

3. A trolley for facilitating the passage to stairs according to claim 1 or 2, characterized in that: the support frame (2) is in a backward concave inverted U shape and comprises an integrally formed upper connecting rod (2 a), a support rod (2 b) and a lower connecting rod (2 c), wherein the upper end of the upper connecting rod (2 a) is connected with the frame, the lower end of the upper connecting rod (2 a) is connected with the upper end of the support rod (2 b), the lower end of the support rod (2 b) is connected with the upper end of the lower connecting rod (2 c), and the lower end of the lower connecting rod (2 c) is connected with the frame; wherein the rear surface of the supporting rod (2 b) is the supporting surface (3).

4. A cargo cart for facilitating an up-stairs according to claim 3, wherein: the two support frames (2) are arranged in a pair, and the two support frames (2) are respectively positioned on the left and right posts (4) of the frame.

5. The easy-to-go cargo cart of claim 4, wherein: the cart further comprises two reinforcing rods (5) for fixing the fixed shafts (6) of the two wheels (1), the front ends of the two reinforcing rods (5) are respectively and fixedly connected with the frame, the rear ends of the two reinforcing rods are respectively and fixedly connected with the left supporting frame and the right supporting frame (2), and the fixed shafts (6) penetrate through the two reinforcing rods (5) from the left direction and the right direction.

6. The easy-to-go cargo cart of claim 1, wherein: the length of the column (4) of the frame is adjustable.

7. The easy-to-go cargo cart of claim 6, wherein: the vehicle column (4) comprises a hollow lower vehicle column (4 b), an upper vehicle column (4 a) inserted into the lower vehicle column (4 b) and an elastic locking piece for locking the upper vehicle column (4 a) on the lower vehicle column (4 b);

a positioning hole (7) is formed in the lower column (4 b);

a plurality of locking holes (8) which are distributed along the length direction of the vehicle column (4) are formed in the upper vehicle column (4 a);

the elastic locking piece is connected to the lower column (4 b), and in a locking state, the elastic locking piece stretches into any locking hole (8) on the upper column (4 a) through a positioning hole (7) on the lower column (4 b).

8. The easy-to-go cargo cart of claim 7, wherein: the elastic locking piece comprises a locking needle (9) and a spring (10) sleeved on the locking needle (9), one end of the spring (10) is propped against and positioned on the locking needle (9), the other end of the spring is propped against and positioned on a positioning seat (11), and the positioning seat (11) is fixed relative to the lower vehicle column (4 b);

the front end of the lock needle (9) is a locking head, and the locking head is arranged corresponding to the positioning hole (7) and the locking hole (8); the middle part of lock needle (9) is equipped with traction handle (12), and this traction handle (12) drive lock needle (9) outwards retract to realize lock needle (9) to the unblock of locking hole (8).

9. The easy-to-go cargo cart of claim 8, wherein: the lower end of the upper vehicle column (4 a) is fixedly provided with a plastic part (13), and the outer diameter of the plastic part (13) is slightly smaller than the inner diameter of the lower vehicle column (4 b);

the vehicle column (4) further comprises a sleeve (14) which is arranged outside the upper vehicle column (4 a) and inside the lower vehicle column (4 b) in a sleeved mode, the inner diameter of the sleeve (14) is smaller than the outer diameter of the plastic piece (13), and the inner diameter of the sleeve (14) is larger than the outer diameter of the upper vehicle column (4 a).

10. The easy-to-go cargo cart of claim 1, wherein: a foldable supporting plate (15) is arranged below the cart, and the supporting plate (15) is turned downwards to be vertical to the frame when in an open state; when folding, the frame is turned upwards and attached to the frame.

11. The easy-to-go cargo cart of claim 1, wherein: the frame is also provided with a plurality of rails (17) which are recessed backwards, and each rail (17) is fixedly arranged between the left column (4) and the right column (4) of the frame.