CN101758845A - Portable type foldable cart - Google Patents

Abstract

The invention discloses a portable type foldable cart which comprises a chassis, a chassis foldable connecting rod, a foldable handle, a flexible pull rod, a universal wheel, a driven wheel, a self-locking spring slide block and a rivet. The cart can be folded in order to take and store so the occupied space is small. The cart can be unfolded so as to carry bigger and heavier goods. Compared with the prior art, the cart is portable, has simple operation and has stable structure. The foldable structure is optimized and improved, so the problems that the cart is inconvenient to take and occupies huge space in the daily use, the goods can easily fall off because the foldable mechanism is not firm enough, and the rod type wheel axle is easy to deform so the drag is strenuous are solved, and the cart is light, portable and firm.

Description

A portable foldable trolley

technical field

The invention belongs to the field of daily necessities, and relates to a shopping and traveling article conveying appliance, in particular to a portable folding trolley.

technical background

Hand carts are commonly used to carry articles and luggage when people are shopping and traveling, because they can bring convenience and save energy to the movers when carrying articles and luggage, so many people carry hand carts when traveling.

However, there are problems in today's handcart products: it takes up a lot of space, it is not easy to carry, the folding mechanism is not strong enough to cause items to slip, the rod-type axle is prone to deformation and dragging is laborious, and the structure of the frame is unstable.

Contents of the invention

The object of the present invention is to provide a trolley which is easy to carry, easy to operate and stable in structure. The invention solves the problem of taking up a lot of space by adopting a folding frame, a folding handle, and a telescopic pull rod. When carrying and storing, the trolley can be folded up, occupying only a small space, and the trailer can be unfolded and consigned when in use. Larger and heavier items. The self-locking spring slider solves the problem of unstable structure of the trolley, thus ensuring its stability during use.

The technical solution to achieve the above purpose is: a portable folding trolley, which consists of an underframe [1], a telescopic pull rod [2], a universal wheel [3], a driven wheel [4], a bearing [5], a bogie [ 6] consisting of a folding handle [7], a folding link [8], a positioning rivet [9], and a self-locking spring slider [10]; it is characterized in that: the two sides of the bottom frame [1] pass through the positioning rivets [9] is connected with the folding connecting rod [8]; the telescopic rod [2] is connected with the bottom frame [1] by bolts, and can rotate around the central line h of the connecting shaft between the telescopic rod [2] and the bottom frame [1] ; The universal wheel [3] is connected with the chassis [1] through the bogie [6]; the driven wheel [4] is connected with the chassis [1] through the bearing [5]; the folding handle [7] is connected with the telescopic pull rod [2] through rivets; the outer ends of the two sub-rods of the folding connecting rod [8] can rotate around the center line j of the rotating pair of the folding connecting rod, and the inner ends of the two sub-rods can rotate around the bottom The rotation center line k of the positioning rivet [9] that frame [1] is connected with folding connecting rod [8] rotates.

A self-locking spring slider [10] is provided at the joint between the bottom frame [1] and the folding link [8], and the folding link [8] rotates 90 degrees around the rotation center line k of the positioning rivet [9] °, the self-locking spring slider [10] ejects, locking the folding link [8].

The maximum rotation angle of the telescopic pull rod [2] around the connection axis h of the chassis [1] is 120°.

Beneficial effects of the present invention:

By systematically optimizing and improving the folding structure, the present invention solves the problems of the trailer being inconvenient to carry, taking up a large space, the folding mechanism is not firm enough to cause items to slip, and the rod-type axle is easily deformed. The problem of labor makes the trailer more lightweight, portable and strong, highlighting the people-oriented thinking of the design.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic diagram of the structure after the folding connecting rod, the folding handle and the telescopic pull rod are completely folded;

Fig. 3 is a schematic diagram of the structure of the folding link, the folding handle and the telescopic pull rod after they are completely folded.

The meanings of the legend marks in the attached drawings are as follows:

1—Underframe, 2—Telescopic rod, 3—Universal wheel, 4—Follower wheel,

5——bearing, 6——bogie, 7——folding handle, 8——folding connecting rod,

9——Positioning rivet, 10——Self-locking spring slider,

h——the center line of the connecting shaft between the telescopic pull rod and the bottom frame,

j—the center line of the rotating pair of the folding connecting rod,

k——rotation centerline of positioning rivets connecting bottom frame and folding link

Detailed ways

The structure and embodiment of a portable folding handcart of the present invention will be described in detail below in conjunction with the accompanying drawings.

Example 1.

The present invention includes underframe [1], telescopic pull rod [2], universal wheel [3], driven wheel [4], bearing [5], bogie [6], folding handle [7], folding connecting rod [8] ], positioning rivets [9], self-locking spring sliders [10]; the two sides of the bottom frame [1] are connected with the folding connecting rod [8] through the positioning rivets [9]; The frame [1] is connected by bolts, the universal wheel [3] is connected with the chassis [1] through the bogie [6], and the driven wheel [4] is connected with the chassis through the bearing [5]; the folding handle [7] ] and the telescopic pull rod [2] through rivets; the structure of the telescopic pull rod [7] includes a section of mother pipe and two sections of sub-sleeves and is connected by a positioning slot.

In the present invention, a self-locking spring slider [10] is provided at the joint between the bottom frame [1] and the folding connecting rod [8], and the folding connecting rod [8] rotates 90° around the rotation center line k of the positioning rivet [9]. When the self-locking spring slide block [10] locks the folding connecting rod [8] and restricts it to rotate around the center line k of the positioning rivet [9], the distance on both sides of the fixed bottom frame [1] plays a role in stabilizing the bottom frame [1]. ] The effect of structure; Underframe [1] has a circular hole above bogie [6], and bogie [6] round pin can rotate in any direction in this circular hole.

The telescopic rod [2] rotates around the central line h of the rotating shaft connecting the telescopic rod and the bottom frame, but the maximum rotation angle with the bottom frame [1] is 120°, which can make the user more labor-saving and comfortable when dragging; the telescopic rod [ 2] There are graded positioning slots in the main pipe and the two sub-sleeves, so that the length of the pull rod can be adjusted in grades according to the height of the user to meet the needs of users of different heights.

The folding handle [7] of the present invention is fixed to the innermost sub-sleeve of the telescopic pull rod [2] through rivets, and can be rotated along the rivets within 0° to 90°, and is in a folded state at 0°, and in an unfolded state at 90° , and in the unfolded state, the arc transition of the terminal of the folding handle [7] to the surface can play the role of self-clamping with the inner wall of the innermost sub-sleeve of the telescopic rod [2], limiting the folding handle [7] around The rivet turns.

The folding connecting rod [8] of the present invention can only rotate along the center line j of the rotating sub-center of the folding connecting rod. When the folding connecting rod is unfolded, it can no longer rotate to the outside to reach the distance on both sides of the fixed chassis [1].

Other embodiments:

The portable folding trolley of the present invention can also be designed into products with different strengths according to the carrying weight and purposes of the goods. For example, a relatively strong and firm structure can be used for carrying goods in the storage area and the sales area, and can be used as a portable handcart. Pull cart can adopt lighter structure.

Claims (3)

1. portable type foldable cart, by underframe [1], telescopic lever [2], cardan wheel [3], flower wheel [4], bearing [5], bogie truck [6], folding handle [7], folding connecting rod [8], locating rivet [9], self-locking spring slide block [10] constitutes; It is characterized in that: the both sides of described underframe [1] are connected with folding connecting rod [8] by locating rivet [9]; Described telescopic lever [2] passes through bolted connection with underframe [1], and can be connected shaft centerline h rotation with underframe [1] around telescopic lever [2]; Described cardan wheel [3] is connected with underframe [1] by bogie truck [6]; Described flower wheel [4] is connected with underframe [1] by bearing [5]; Described folding handle [7] is connected by rivet with telescopic lever [2]; Two branch bar outer ends of described folding connecting rod [8] can be rotated around folding connecting rod revolute pair line of centers j, and two branch bar the inners can be rotated around the rotary centerline k of underframe [1] with folding connecting rod [8] bonded assembly locating rivet [9].

2. a kind of portable type foldable cart according to claim 1, it is characterized in that: described underframe [1] is provided with self-locking spring slide block [10] with the junction of folding connecting rod [8], described folding connecting rod [8] is when locating rivet [9] rotary centerline k half-twist, self-locking spring slide block [10] ejects, locking folding connecting rod [8].

3. a kind of portable type foldable cart according to claim 1 is characterized in that: described telescopic lever [2] is 120 ° around the maximum angle that underframe [1] connects axis h rotation.

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