Folding trolley

Abstract

The utility model discloses a folding trolley which comprises a folding frame, the folding frame comprises a front folding frame and a rear folding frame, the rear end of the bottom of the front frame is in pivot connection with the front end of the bottom of the rear folding frame, and the rear end of the top of the front frame is in pivot connection with the rear end of the bottom of the rear folding frame through a first inclined connecting rod. The front end of the top of the rear folding frame and the front end of the bottom of the front folding frame are in pivot connection through a second inclined connecting rod, the top close to the rear end of the front folding frame and the bottom close to the middle of the front folding frame are in pivot connection through a first connecting rod, and the top close to the front end of the rear folding frame and the bottom close to the middle of the front folding frame are in pivot connection through a second connecting rod. Compared with the prior art, the structural strength and the bearing capacity of the middle of the folding frame are improved through the first connecting rod and the second connecting rod, but the whole structure is relatively simple, and cost is low.

Description

Technical Field

[0001] The utility model relates to a folding trolley. Background Art

[0002] Chinese Patent Publication No. CN204871112U discloses a foldable trolley frame, which includes a collapsible frame and a plurality of pulleys. The pulleys are mounted at the bottom of the frame. The frame includes: two fixed frames arranged side by side at left and right intervals; two load-bearing parts, the outer sides of the two load-bearing parts are respectively pivotally connected to the two fixed frames, and the inner sides of the load-bearing parts are pivotally connected together; and two folding parts arranged side by side at front and rear intervals. The folding part includes two first connecting rods and two second connecting rods. The two first connecting rods are pivotally connected together and form a scissor-shaped connecting rod group. The lower ends of the two first connecting rods are pivotally connected to the lower parts of the two fixed frames. The inner ends of the two second connecting rods are respectively pivotally connected to the upper ends of the two first connecting rods. The outer ends of the two second connecting rods are respectively pivotally connected to the upper parts of the two fixed frames. Among them, the load-bearing capacity in the middle of the vehicle frame is relatively good, but the structure is complex.

[0003] US Patent Publication No. US10435055B1 discloses a foldable trolley, including a handle, a first support frame and a second support frame. In one embodiment, the handle is movably fixed to the first support frame, and the first support frame and the second support frame are connected by a connecting member. The connecting member may include a plurality of connecting units. In one embodiment, the foldable trolley further includes a fabric fixed at a receiving space formed by the support frames on both sides and the connecting member. It should be noted that when the trolley is fully unfolded, the first connecting unit and the second connecting unit are respectively substantially perpendicular to the second support frame and the first support frame to reinforce the connecting member. The load-bearing capacity in the middle of it is poor, but the structure is relatively simple. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a folding trolley different from the prior art.

[0005] The purpose of the utility model is achieved as follows.

[0006] A folding trolley includes a folding vehicle frame. The folding vehicle frame includes a front folding frame and a rear folding frame. The rear end of the bottom of the front frame is pivotally connected to the front end of the bottom of the rear folding frame. The rear end of the top of the front frame and the rear end of the bottom of the rear folding frame are pivotally connected by a first inclined connecting rod. The front end of the top of the rear folding frame and the front end of the bottom of the front frame are pivotally connected by a second inclined connecting rod. The vicinity of the rear end of the top of the front folding frame and the vicinity of the middle of the bottom of the front folding frame are pivotally connected by a first connecting rod. The vicinity of the front end of the top of the rear folding frame and the vicinity of the middle of the bottom of the front folding frame are pivotally connected by a second connecting rod.

[0007] Compared with the prior art, the utility model improves the structural strength and load-bearing capacity in the middle of the folding vehicle frame through the first connecting rod and the second connecting rod, but the overall structure is relatively simple and the cost is low.

[0008] Further, the front folding frame includes a first top frame, a front frame, and a first bottom frame. The top of the front frame is pivotally connected to the front end of the first top frame, and the bottom of the front frame is pivotally connected to the front end of the first bottom frame. The rear end of the first bottom frame protrudes beyond the rear end of the first top frame. The top of the first link is pivotally connected to the first top frame near the rear end, and the bottom of the first link is pivotally connected to the middle and rear parts of the first bottom frame. After the front folding frame is in the unfolded state, the front frame is vertically arranged, the first top frame and the first bottom frame are horizontally arranged, and the first link is vertically arranged relative to the first top frame or the first bottom frame.

[0009] The front folding frame improves the structural stability of its rear end through the second link, thereby enhancing the structural strength of the middle part of the folding frame and improving its load-bearing capacity.

[0010] Further, both the first top frame and the front frame are U-shaped frames. The open end of the first top frame forms the rear end of the top of the front folding frame, the closed end of the front frame forms the front end of the bottom of the front folding frame, and the rear end of the first bottom frame forms the rear end of the bottom of the front folding frame.

[0011] The front folding frame has a simple structure and is easy to fold and extend.

[0012] Further, the rear folding frame includes a second top frame, a rear frame, and a second bottom frame. The top of the rear frame is pivotally connected to the rear end of the second top frame, and the bottom of the rear frame is pivotally connected to the rear end of the second bottom frame. The front end of the first bottom frame protrudes beyond the front end of the first top frame. The top of the second link is pivotally connected to the first top frame near the front end, and the bottom of the second link is pivotally connected to the middle and front parts of the first bottom frame. After the front folding frame is in the unfolded state, the rear frame is vertically arranged, the second top frame and the second bottom frame are horizontally arranged, and the second link is vertically arranged relative to the second top frame or the second bottom frame.

[0013] The rear folding frame improves the structural stability of its front end through the second link, thereby enhancing the structural strength of the middle part of the folding frame and improving its load-bearing capacity.

[0014] Further, both the second top frame and the rear frame are U-shaped frames. The open end of the second top frame forms the front end of the top of the rear folding frame, and the closed end of the front frame forms the rear end of the bottom of the rear folding frame. The front end of the first bottom frame forms the front end of the bottom of the rear folding frame.

[0015] The rear folding frame has a simple structure and is easy to fold and extend.

[0016] Further, the first diagonal link and the second diagonal link are arranged in a scissor shape but have no direct connection structure.

[0017] The first diagonal link and the second diagonal link facilitate the folding of the front folding frame and the rear folding frame.

[0018] Further, the first inclined link and the second inclined link are arranged inside and outside, and the first link or the second link is disposed between the first inclined link and the second inclined link, so that the first inclined link and the second inclined link are not in contact with each other.

[0019] Friction between the first inclined link and the second inclined link is avoided.

[0020] Further, universal roller assemblies are respectively provided on both sides of the front end of the bottom of the front folding frame and both sides of the rear end of the bottom of the rear folding frame.

[0021] The detachable design of the universal roller assembly facilitates the packaging and transportation of the folding trolley, and the folding frame can be conveniently moved after the universal roller assembly is installed.

[0022] Further, a detachable push rod assembly is provided at the rear part of the rear folding frame.

[0023] The detachable design of the push rod assembly facilitates the packaging and transportation of the folding trolley, and the folding frame can be conveniently controlled to move after the push rod assembly is installed.

[0024] Further, a fabric forming a receiving space is provided in the inner cavity of the folding frame. A latch is provided on the fabric. After the fabric is folded with the folding frame, the latch is locked to keep the frame in a folded state.

[0025] After the folding frame is folded, it is not easy to be fixed by the latch and is not easy to automatically extend, which is convenient for the packaging and transportation of the folding trolley.

[0026] Compared with the prior art, the middle structure strength and load-bearing capacity of the folding frame are improved by the first link and the second link of the present invention, but the overall structure is relatively simple and the cost is low. The design of the first link and the second link makes the first inclined link and the second inclined link not in contact with each other, and the assembly is easier. Description of the Drawings

[0027] Figure 1 It is a schematic view of the unfolded state of the folding frame in the first embodiment.

[0028] Figure 2 It is a schematic view of the folded state of the folding frame in the first embodiment.

[0029] Figure 3 It is a schematic exploded view of the folding frame in the first embodiment. Detailed Embodiments

[0030] The present invention will be further described below in conjunction with the drawings and embodiments.

[0031] Embodiment 1, referring to Figures 1-3 As shown, a folding trolley includes a folding frame 1, a universal roller assembly 4, a push rod assembly 5 and a fabric (not shown in the figure). The fabric is disposed in a receiving space formed in the inner cavity of the folding frame 1.

[0032] The folding frame 1 includes a front folding frame 2 and a rear folding frame 3. The rear end of the bottom of the front frame is pivotally connected to the front end of the bottom of the rear folding frame 3. The rear end of the top of the front frame and the rear end of the bottom of the rear folding frame 3 are pivotally connected by a first diagonal link 11. The front end of the top of the rear folding frame 3 and the front end of the bottom of the front frame are pivotally connected by a second diagonal link 12. The position near the rear end of the top of the front folding frame 2 and the position near the middle of the bottom of the front folding frame 2 are pivotally connected by a first link 24. The position near the front end of the top of the rear folding frame 3 and the position near the middle of the bottom of the front folding frame 2 are pivotally connected by a second link 34.

[0033] Specifically, the front folding frame 2 includes a first top frame 21, a front frame 22, and a first bottom frame 23. The top of the front frame 22 is pivotally connected to the front end of the first top frame 21. The bottom of the front frame 22 is pivotally connected to the front end of the first bottom frame 23. The rear end of the first bottom frame 23 protrudes beyond the rear end of the first top frame 21. The top of the first link 24 is pivotally connected to the position near the rear end of the first top frame 21. The bottom of the first link 24 is pivotally connected to the middle and rear part of the first bottom frame 23. After the front folding frame 2 is in the unfolded state, the front frame 22 is vertically arranged, the first top frame 21 and the first bottom frame 23 are horizontally arranged, and the first link 24 is vertically arranged relative to the first top frame 21 or the first bottom frame 23. Preferably, both the first top frame 21 and the front frame 22 are U-shaped frames. The open end of the first top frame 21 constitutes the rear end of the top of the front folding frame 2. The closed end of the front frame 22 constitutes the front end of the bottom of the front folding frame 2. The rear end of the first bottom frame 23 constitutes the rear end of the bottom of the front folding frame 2.

[0034] The rear folding frame 3 includes a second top frame 31, a rear frame 32, and a second bottom frame 33. The top of the rear frame 32 is pivotally connected to the rear end of the second top frame 31. The bottom of the rear frame 32 is pivotally connected to the rear end of the second bottom frame 33. The front end of the first bottom frame 23 protrudes beyond the front end of the first top frame 21. The top of the second link 34 is pivotally connected to the position near the front end of the first top frame 21. The bottom of the second link 34 is pivotally connected to the middle and front part of the first bottom frame 23. After the front folding frame 2 is in the unfolded state, the rear frame 32 is vertically arranged, the second top frame 31 and the second bottom frame 33 are horizontally arranged, and the second link 34 is vertically arranged relative to the second top frame 31 or the second bottom frame 33. Preferably, both the second top frame 31 and the rear frame 32 are U-shaped frames. The open end of the second top frame 31 constitutes the front end of the top of the rear folding frame 3. The closed end of the front frame 22 constitutes the rear end of the bottom of the rear folding frame 3. The front end of the first bottom frame 23 constitutes the front end of the bottom of the rear folding frame 3.

[0035] Among them, a limiting member 6 is provided at the pivot connection between the first bottom frame 23 and the second bottom frame 33. The limiting member 6 enables the first bottom frame 23 and the second bottom frame 33 to be unable to continue to rotate downward for folding after rotating to the horizontal, and can only rotate upward for folding. In this embodiment, the limiting member 6 is fixed to the rear end of the first bottom frame 23.

[0036] After the front folding frame 2 and the rear folding frame 3 are connected, the first diagonal link 11 and the second diagonal link 12 are arranged in a scissor shape, but there is no direct connection structure between them. The first diagonal link 11 and the second diagonal link 12 are arranged inside and outside, and the first link 24 or the second link 34 is placed between the first diagonal link 11 and the second diagonal link 12, so that the first diagonal link 11 and the second diagonal link 12 do not contact each other. In this embodiment, preferably, the first link 24 is placed between the first diagonal link 11 and the second diagonal link 12. Preferably, a wear-resistant member (not shown in the figure) is provided in the axial direction at the bottom of the first link 24 where it is pivotally connected to the front folding frame 2. The wear-resistant member leaves a gap between the first link 24 and the front folding frame 2 laterally, further ensuring that the first diagonal link 11 and the second diagonal link 12 do not contact each other.

[0037] Detachable universal roller assemblies 4 are respectively provided on both sides of the front end of the bottom of the front folding frame 2 and on both sides of the rear end of the bottom of the rear folding frame 3. A detachable push rod assembly 5 is provided at the rear of the rear folding frame 3. The universal roller assemblies 4 and the push rod assembly 5 are both prior arts and will not be described in detail in this embodiment.

[0038] Latch fasteners (not shown in the figure) are provided at the front end of the top of the front folding frame 2, the rear end of the top of the rear folding frame 3, the middle side of the front end of the front folding frame 2, and the middle side of the rear end of the rear folding frame 3 for the fabric. When the fabric is folded with the folding bike frame 1, the latch fasteners lock the folding bike frame 1 from two directions, the top and the side, to keep the folding bike frame 1 in a folded state. The latch fasteners are fixedly connected by an adjustable length belt of the fabric. The latch fasteners are prior arts and the structure will not be described in detail in this embodiment.

[0039] If terms such as first and second are used in the present invention, they do not represent any order, quantity or importance, but are only used for distinction.

[0040] If terms such as a and an are used in the present invention, they do not represent a limitation of quantity, but represent the existence of at least one of the mentioned objects.

[0041] If terms indicating orientation or position such as front end, rear end, top, bottom, side, longitudinal, transverse, middle, center, outer, inner, horizontal, vertical, left, right, upper, lower, etc. are used in the present invention, they mean to reflect relative positions rather than absolute positions.

[0042] If terms such as approximately, overall, nearly, similar, etc. are used in the present invention, they are limiting terms used to indicate the existence of features but allowing certain deviations. The amount of allowable deviation may vary depending on the specific background.

Claims

1. A foldable trolley, comprising a foldable frame (1), characterized in that: The folding frame (1) comprises a front folding frame (2) and a rear folding frame (3); the rear end of the bottom of the front frame and the front end of the bottom of the rear folding frame (3) are pivotally connected; the rear end of the top of the front frame and the rear end of the bottom of the rear folding frame (3) are pivotally connected via a first oblique link (11); the front end of the top of the rear folding frame (3) and the front end of the bottom of the front frame are pivotally connected via a second oblique link (12); the top of the front folding frame (2) near the rear end and the bottom of the front folding frame (2) near the middle are pivotally connected via a first link (24); the top of the rear folding frame (3) near the front end and the bottom of the front folding frame (2) near the middle are pivotally connected via a second link (34).

2. The foldable trolley according to claim 1, characterized in that: The front folding frame (2) comprises a first top frame (21), a front frame (22) and a first bottom frame (23); the top of the front frame (22) is pivotally connected to the front end of the first top frame (21); the bottom of the front frame (22) is pivotally connected to the front end of the first bottom frame (23); the rear end of the first bottom frame (23) protrudes from the rear end of the first top frame (21); the top of the first connecting rod (24) is pivotally connected to the first top frame (21) near the rear end; the bottom of the first connecting rod (24) is pivotally connected to the middle and rear part of the first bottom frame (23); when the front folding frame (2) is in an unfolded state, the front frame (22) is vertically arranged, the first top frame (21) and the first bottom frame (23) are horizontally arranged, and the first connecting rod (24) is vertically arranged relative to the first top frame (21) or the first bottom frame (23).

3. The foldable trolley according to claim 2, characterized in that: The first top frame (21) and the front frame (22) are both U-shaped frames, the open end of the first top frame (21) constitutes the top rear end of the front folding frame (2), the closed end of the front frame (22) constitutes the bottom front end of the front folding frame (2), and the rear end of the first bottom frame (23) constitutes the bottom rear end of the front folding frame (2).

4. The foldable trolley according to claim 1, characterized in that: The rear folding frame (3) comprises a second top frame (31), a rear frame (32) and a second bottom frame (33); the top of the rear frame (32) is pivotally connected to the rear end of the second top frame (31); the bottom of the rear frame (32) is pivotally connected to the rear end of the second bottom frame (33); the front end of the first bottom frame (23) protrudes from the front end of the first top frame (21); the top of the second connecting rod (34) is pivotally connected to the first top frame (21) near the front end; the bottom of the second connecting rod (34) is pivotally connected to the middle front part of the first bottom frame (23); when the front folding frame (2) is in the unfolded state, the rear frame (32) is vertically arranged, the second top frame (31) and the second bottom frame (33) are horizontally arranged, and the second connecting rod (34) is vertically arranged relative to the second top frame (31) or the second bottom frame (33).

5. The foldable trolley according to claim 4, characterized in that: The second top frame (31) and the rear frame (32) are both U-shaped frames, the open end of the second top frame (31) constitutes the top front end of the rear folding frame (3), the closed end of the front frame (22) constitutes the bottom rear end of the rear folding frame (3), and the front end of the first bottom frame (23) constitutes the bottom front end of the rear folding frame (3).

6. The foldable trolley according to claim 1, characterized in that: The first oblique connecting rod (11) and the second oblique connecting rod (12) are arranged in a scissor-like manner but there is no direct connection structure between the two.

7. The foldable trolley according to claim 1, characterized in that: The first oblique connecting rod (11) and the second oblique connecting rod (12) are arranged inside and outside, and the first connecting rod (24) or the second connecting rod (34) is arranged between the first oblique connecting rod (11) and the second oblique connecting rod (12), so that the first oblique connecting rod (11) and the second oblique connecting rod (12) are not in contact.

8. The foldable trolley according to claim 1, characterized in that: Removable universal roller assemblies (4) are respectively provided on both sides of the front end of the bottom of the front folding frame (2) and on both sides of the rear end of the bottom of the rear folding frame (3).

9. The foldable trolley according to claim 1, characterized in that: A detachable push rod assembly (5) is provided at the rear of the rear folding frame (3).

10. The foldable trolley according to claim 1, characterized in that: The inner cavity of the folding frame (1) is provided with a fabric forming an accommodation space, and a lock buckle is provided on the fabric. When the fabric is folded along with the folding frame (1), the lock buckle is locked to keep the frame in a folded state.

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