CN220721165U - Folding trailer pull rod mechanism and folding trailer - Google Patents

Abstract

The utility model relates to a pull rod mechanism of a folding trailer and the folding trailer. The limiting assembly comprises a sliding sleeve, a first limiting plate and a second limiting plate, the sliding sleeve is arranged on the pull rod in a sliding mode, first ends of the first limiting plate and the second limiting plate are connected with the sliding sleeve in a rotating mode, and second ends of the first limiting plate and the second limiting plate are connected with the two connecting pipes in a rotating mode respectively. The first limiting plate, the connecting pipe and the pull rod form a triangular structure, the second limiting plate, the connecting pipe and the pull rod form a triangular structure, the stability characteristics of the triangular structure effectively ensure that the middle pull rod cannot swing left and right under the condition of being stressed, the movement direction of the trailer is easier to control when the folding trailer is dragged, the operation difficulty of the folding trailer is reduced, and the use experience of a user is improved.

Description

Folding trailer pull rod mechanism and folding trailer

Technical Field

The utility model relates to the technical field of folding trailers, in particular to a folding trailer pull rod mechanism and a folding trailer.

Background

The folding trailer basically comprises a foldable frame, rollers and pull rods, a user drives the folding trailer to advance and steer through the pull rods, the pull rods of the existing folding trailer are basically connected to the foldable frame in a hinged mode, for example, the pull rod mechanism 30 in CN208439270U and CN218489699U and the pull rod mechanism 30 in CN208439270U comprises two first pull rods, one second pull rod and an assembly seat, the two first pull rods are arranged at intervals, one ends of the two first pull rods are both rotationally connected with the positioning seat, and the other ends of the two first pull rods are fixedly connected through the assembly seat; the second pull rod is rotationally connected to the assembly seat and can be arranged between the two first pull rods, a first positioning groove is formed in the positioning seat, and a second positioning groove is formed in the assembly seat. The pull rod mechanism in CN218489699U comprises two hinging pieces, two hinging rods, a connecting piece and a handle; the two articulated elements are respectively articulated with the outer side walls of the adjacent two telescopic rods, which are close to the bottom ends, one ends of the two articulated rods are respectively and elastically articulated with the two articulated elements, the other ends of the two articulated rods are respectively articulated with the two ends of the connecting piece, and the handle is connected with the connecting piece. However, the handle of the existing folding trailer is easy to swing left and right in the use process, the direction of the trailer is difficult to control when the trailer is pulled and turned, the operation difficulty of the folding trailer is high, and the use experience of a user is seriously affected.

Disclosure of Invention

First, the technical problem to be solved

In view of the above-mentioned drawbacks and shortcomings of the prior art, the present utility model provides a pull rod mechanism of a folding trailer and a folding trailer, which solve the technical problem that a handle is easy to swing left and right in the use process.

(II) technical scheme

In order to achieve the above purpose, the folding trailer pull rod mechanism of the utility model comprises a pull rod, a fixed seat and a limiting component;

the lower end of the pull rod is connected with the fixed seat, two ends of the fixed seat are rotatably connected with connecting pipes at limited angles, and the connecting pipes are rotatably connected with the folding trailer;

the limiting assembly comprises a sliding sleeve, a first limiting plate and a second limiting plate, the sliding sleeve is arranged on the pull rod in a sliding mode, the first end of the first limiting plate and the first end of the second limiting plate are connected with the sliding sleeve in a rotating mode, and the second end of the first limiting plate and the second end of the second limiting plate are connected with two connecting pipes in a rotating mode respectively.

Optionally, the fixing base includes a connecting portion, a first mounting portion and a second mounting portion, where the first mounting portion and the second mounting portion are symmetrically disposed on two sides of the connecting portion;

the first ends of the pull rods are connected with the connecting parts, and the first ends of the two connecting pipes are respectively in one-to-one correspondence with the first mounting parts and the second mounting parts and are in rotation connection with the first mounting parts and the second mounting parts at a limited angle;

the connecting pipes can be switched between a first state and a second state, the two connecting pipes are positioned on the same straight line in the first state, and an included angle between the pull rod and the connecting pipes is 90 degrees; in the second state, the included angle between the connecting pipes and the pull rods is smaller than 90 degrees, and the second ends of the two connecting pipes and the second ends of the pull rods are located on the same side of the fixing seat.

Optionally, the pull rod includes a first flexible pipe and a second flexible pipe, the first end of the first flexible pipe with the fixing base is connected, the second flexible pipe is slidingly sleeved in the first flexible pipe, and the sliding sleeve is slidingly arranged on the first flexible pipe.

Optionally, a locking assembly is arranged on the pull rod, the locking assembly comprises a pressing plate, a locking piece and an elastic piece, a first through hole is formed in the first telescopic pipe, and a second through hole is formed in the second telescopic pipe;

the pressing plate is arranged on the first telescopic pipe and is opposite to the first through hole;

the locking piece is sleeved in the second through hole in a sliding way, the elastic piece is arranged in the second telescopic pipe, and the elastic piece is connected with the locking piece;

the second telescopic pipe can slide to the second through hole to be aligned with the first through hole, so that the locking piece is abutted on the pressing plate after passing through the first through hole.

Optionally, a handle is arranged on the second telescopic tube.

Further, the utility model also provides a folding trailer comprising a folding frame and a folding trailer tie rod mechanism as described above;

the folding bicycle frame comprises: four upright posts which are arranged at intervals in a rectangular shape, a bottom support mechanism which is arranged between the four upright posts and is connected with the lower ends of the four upright posts, and a folding mechanism which is connected between two adjacent upright posts;

the two connecting pipes are in one-to-one corresponding rotary connection with the two adjacent upright posts.

Optionally, a foot connecting piece is arranged at the lower end of the upright post, the foot connecting piece comprises a fixing piece and a rotating piece, the fixing piece is arranged at the lower end of the upright post, the rotating piece is rotationally connected with the fixing piece, and the rotating piece can rotate in a first plane;

the connecting pipe is rotationally connected with the rotating piece, the connecting pipe can rotate in a second plane, and the first plane is perpendicular to the second plane.

(III) beneficial effects

When folding trailer pull rod mechanism is in the state of expanding, first limiting plate, connecting pipe, pull rod constitute first triangle-shaped structure, second limiting plate, connecting pipe, pull rod constitute second triangle-shaped structure, and first triangle-shaped structure and second triangle-shaped structure symmetry set up in the left and right sides of pull rod, triangle-shaped structure's stability characteristics guaranteed the pull rod in the middle also can not take place the horizontal hunting under the circumstances of atress effectively, control trailer direction of motion more easily when dragging folding trailer, the operation degree of difficulty of folding trailer has been reduced, user's use experience has been improved. When the trailer frame is folded, the pull rod is pressed by the force opposite to the dragging direction, at the moment, the two connecting pipes are rotated upwards around the fixed seat to drive the first limiting plate and the second limiting plate to rotate downwards around the sliding sleeve synchronously, the first limiting plate and the second limiting plate push the sliding sleeve to slide upwards along the pull rod to realize folding, the transverse width of the folding trailer pull rod mechanism is reduced, the folding trailer frame is matched with the folding trailer frame, and therefore the size of the trailer frame is reduced, and the carrying and the storage of a user are facilitated.

Drawings

FIG. 1 is a schematic view of the folding trailer hitch of the present utility model in an extended configuration;

FIG. 2 is a schematic view of the folding trailer hitch mechanism of the present utility model in a folded configuration;

FIG. 3 is a perspective view of the folding trailer of the present utility model;

FIG. 4 is a front view of the folding trailer of the present utility model;

fig. 5 is a front view of the folded state of the folding trailer of the present utility model.

[ reference numerals description ]

1: a pull rod; 11: a first telescopic tube; 12: a second telescopic tube;

2: a fixing seat; 20: a connection part; 21: a first mounting portion; 22: a second mounting portion;

3: a limit component; 30: a sliding sleeve; 31: a first limiting plate; 32: a second limiting plate;

4: a connecting pipe;

5: a locking assembly; 51: a pressing plate;

6: a handle;

71: a column; 72: a bottom support mechanism; 73: a folding mechanism;

8: a foot connector; 81: a fixing member; 82: and a rotating member.

Detailed Description

The utility model will be better explained for understanding by referring to the following detailed description of the embodiments in conjunction with the accompanying drawings. Wherein references herein to "upper", "lower", "etc. are made with reference to the orientation of fig. 1.

While exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.

As shown in fig. 1 to 5, the utility model provides a pull rod mechanism of a folding trailer, which comprises a pull rod 1, a fixed seat 2 and a limiting assembly 3, wherein the lower end of the pull rod 1 is connected with the fixed seat 2, a connecting pipe 4 is rotatably connected at a limited angle at the left end and the right end of the fixed seat 2, the connecting pipe 4 can only rotate upwards in the state shown in fig. 4 by taking the fixed seat 2 as a rotation center, and the other end of the connecting pipe 4 is rotatably connected with the folding trailer, so that a user can drive the folding trailer to move by dragging the pull rod 1, and the articles are conveniently carried. Referring to fig. 1, the limiting assembly 3 includes a sliding sleeve 30, a first limiting plate 31 and a second limiting plate 32, wherein the sliding sleeve 30 is installed on the pull rod 1 in a sliding sleeved mode, first ends of the first limiting plate 31 and the second limiting plate 32 are rotationally connected with the sliding sleeve 30, and the first limiting plate 31 and the second limiting plate 32 are located in the same plane. The second ends of the first limiting plate 31 and the second limiting plate 32 are respectively connected with the pipe bodies of the two connecting pipes 4 in a rotating way.

When folding trailer pull rod mechanism is in the state of expanding, first limiting plate 31, connecting pipe 4, pull rod 1 constitute first triangle-shaped structure, second limiting plate 32, connecting pipe 4, pull rod 1 constitute second triangle-shaped structure, and first triangle-shaped structure and second triangle-shaped structure symmetry set up in the left and right sides of pull rod 1, triangle-shaped structure's stability characteristics have guaranteed effectively that middle pull rod 1 also can not take place the horizontal hunting under the circumstances of atress, control trailer direction of motion more easily when dragging folding trailer, the operation degree of difficulty of folding trailer has been reduced, user's use experience has been improved. When the trailer frame is folded, the pull rod 1 is pressed by the force opposite to the dragging direction, at the moment, the two connecting pipes 4 are rotated upwards around the fixed seat 2, the first limiting plate 31 and the second limiting plate 32 are driven to rotate downwards synchronously around the sliding sleeve 30, the first limiting plate 31 and the second limiting plate 32 push the sliding sleeve 30 to slide upwards along the pull rod 1 to realize folding, the transverse width of the folding trailer pull rod mechanism is reduced, and the folding trailer frame is matched with the folding trailer frame, so that the size of the trailer frame is reduced, and the carrying and the storage of a user are facilitated.

As shown in fig. 1 and 3, the fixing base 2 includes a connecting portion 20, a first mounting portion 21 and a second mounting portion 22, and the first mounting portion 21 and the second mounting portion 22 are symmetrically disposed on two sides of the connecting portion 20. The first ends of the pull rods 1 are fixedly connected with the connecting parts 20 through bolts, pins and the like, and the first ends of the two connecting pipes 4 are respectively in one-to-one correspondence with the first mounting parts 21 and the second mounting parts 22 to be in rotation connection with a limited angle. Preferably, the first installation portion 21 and the second installation portion 22 are respectively provided with a limit groove, the limit grooves penetrate through the end surfaces of the installation portions, the first end of the connecting pipe 4 is inserted into the limit grooves and is rotationally connected with the inner side walls of the limit grooves through the rotating shafts, and the pull rod 1 is perpendicular to the bottoms of the limit grooves. The connecting pipe 4 is switched between the first state and the second state in the rotating process, the two connecting pipes 4 are located on the same straight line in the first state, at the moment, the length direction of the connecting pipe 4 is parallel to the length direction of the limiting groove, the pipe wall of the connecting pipe 4 is in butt joint with the bottom of the limiting groove, the included angle between the pull rod 1 and the connecting pipe 4 is 90 degrees, the pull rod 1, the connecting pipe 4 and the first limiting plate 31 form a stable right-angled triangle structure, the pull rod 1, the connecting pipe 4 and the second limiting plate 32 also form a stable right-angled triangle structure, the phenomenon that the pull rod 1 swings relative to a trailer frame when the trailer is pulled is avoided, and the pull rod 1 can always effectively control the moving direction of the trailer. In the second state, the included angle between the connecting pipes 4 and the pull rod 1 is smaller than 90 degrees, the second ends of the two connecting pipes 4 and the second end of the pull rod 1 are located on the same side of the fixed seat 2, the two connecting pipes 4 gather towards the pull rod 1, and the pull rod mechanism is folded and contracted, so that the width of the pull rod mechanism is effectively reduced.

As shown in fig. 1 and 2, the pull rod 1 is a telescopic rod, and comprises a first telescopic tube 11 and a second telescopic tube 12, wherein a first end of the first telescopic tube 11 is connected with the fixed seat 2, the second telescopic tube 12 is slidably sleeved in the first telescopic tube 11, and the sliding sleeve 30 is slidably arranged on the first telescopic tube 11. In other embodiments, the tie rod 1 may be a structure in which a plurality of telescopic tubes are sequentially sleeved, and the present utility model is described by taking two telescopic tubes as an example, but is not limited to two telescopic tubes. When the pull rod mechanism is in an unfolding state, namely the connecting pipe 4 is in a first state, the second telescopic pipe 12 stretches out, so that the length of the pull rod 1 is increased, and the pull rod is convenient for a user to drag; when the pull rod mechanism is in a folded state, namely the connecting pipe 4 is in a second state, the second telescopic pipe 12 is contracted in the first telescopic pipe 11, so that the length of the pull rod 1 is reduced, the size of the pull rod mechanism is further reduced, and the user can conveniently store the pull rod mechanism.

As shown in fig. 1, a locking assembly 5 is arranged on a pull rod 1, the locking assembly 5 comprises a pressing plate 51, a locking piece and an elastic piece, a first through hole is formed in a first telescopic pipe 11, a second through hole is formed in a second telescopic pipe 12, the cross section shapes of the first through hole and the second through hole are matched with the cross section of the locking piece, and therefore the locking piece can slide freely in the first through hole and the second through hole. The pressing plate 51 is disposed on the first telescopic tube 11, the pressing plate 51 is opposite to the first through hole, the pressing plate 51 covers the opening of the first through hole, and a certain distance is formed between the pressing plate 51 and the first telescopic tube 11. The locking member is slidably sleeved in the second through hole, the elastic member is arranged in the second telescopic tube 12 and is connected with the locking member, the elastic member is preferably a spring, and the elastic member provides supporting force for the locking member. When the second telescopic tube 12 is slid until the second through hole is aligned with the first through hole, the second telescopic tube 12 extends out of the first telescopic tube 11, and the locking member passes through the first through hole and abuts against the pressing plate 51, thereby locking between the first telescopic tube 11 and the second telescopic tube 12. When the pull rod 1 needs to be contracted, the pressing plate 51 is pressed, the pressing plate 51 pushes the locking piece to withdraw from the first through hole, the first telescopic pipe 11 and the second telescopic pipe 12 are unlocked, and the second telescopic pipe 12 slides and contracts into the first telescopic pipe 11.

As shown in fig. 1-5, the second telescopic tube 12 is provided with a handle 6 for grasping by a user, so as to improve the convenience of the user when dragging the trailer.

Further, the present utility model also provides a folding trailer, as shown in fig. 3-5, comprising a folding chassis and a folding trailer drawbar mechanism. Wherein, folding frame includes: four upright posts 71 arranged at intervals in a rectangular shape, a bottom support mechanism 72 arranged between the four upright posts 71 and connected with the lower ends of the four upright posts 71, and a folding mechanism 73 connected between two adjacent upright posts 71. The bottom support mechanism 72 can be folded upwards to shrink and gather, the folding mechanism 73 can be transversely shrunk to enable two adjacent upright posts 71 to gather each other, and four telescopic upright posts are gathered to the central position through the folding mechanism 73 and the folding shrinkage of the bottom support mechanism 72, so that the volume of the folding trailer is reduced, and convenience is brought to users for carrying and storage. The two connecting pipes 4 are in one-to-one corresponding rotation connection with two adjacent upright posts 71 positioned at the end part of the trailer, and when the folding mechanism 73 connected between the two upright posts 71 is folded and contracted, the pull rod mechanism is synchronously folded and contracted, so that the pull rod mechanism is matched with the folding frame to be folded, and the volume of the folding trailer is reduced.

As shown in fig. 3 and 4, the lower end of the upright 71 is provided with a foot connecting member 8, the foot connecting member 8 includes a fixing member 81 and a rotating member 82, the fixing member 81 is fixedly mounted at the lower end of the upright 71, the rotating member 82 includes two connecting arms perpendicular to each other, and one connecting arm of the rotating member 82 is rotatably connected with the fixing member 81 through a rotating shaft, so that the rotating member 82 can rotate in a first plane. The end part of the other connecting arm is provided with a U-shaped groove, and the connecting pipe 4 is rotationally connected with the U-shaped groove through a rotating shaft, so that the connecting pipe 4 can rotate in a second plane, and the first plane is perpendicular to the second plane. When the folding trailer is pulled, the rotating piece 82 rotates around the fixing piece 81, so that the pull rod 1 can swing along the front-back direction of the folding trailer, and the horizontal height of the handle 6 is changed to adapt to users with different heights. When the folding trailer is stored, the two connecting pipes 4 respectively rotate downwards around the corresponding rotating parts 82 to gather together, so that the volume is reduced.

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; may be a communication between two elements or an interaction between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature, which may be in direct contact with the first and second features, or in indirect contact with the first and second features via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is level lower than the second feature.

In the description of the present specification, the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., refer to particular features, structures, materials, or characteristics described in connection with the embodiment or example as being included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that alterations, modifications, substitutions and variations may be made in the above embodiments by those skilled in the art within the scope of the utility model.

Claims (7)

1. The folding trailer pull rod mechanism is characterized by comprising a pull rod (1), a fixed seat (2) and a limiting assembly (3);

the lower end of the pull rod (1) is connected with the fixed seat (2), two ends of the fixed seat (2) are rotatably connected with a connecting pipe (4) at a limited angle, and the connecting pipe (4) is rotatably connected with the folding trailer;

the limiting assembly (3) comprises a sliding sleeve (30), a first limiting plate (31) and a second limiting plate (32), the sliding sleeve (30) is arranged on the pull rod (1) in a sliding mode, the first limiting plate (31) and the first end of the second limiting plate (32) are both connected with the sliding sleeve (30) in a rotating mode, and the second ends of the first limiting plate (31) and the second limiting plate (32) are respectively connected with the two connecting pipes (4) in a rotating mode.

2. The folding trailer drawbar mechanism according to claim 1, wherein the fixing base (2) comprises a connecting portion (20), a first mounting portion (21) and a second mounting portion (22), and the first mounting portion (21) and the second mounting portion (22) are symmetrically arranged at two sides of the connecting portion (20);

the first ends of the pull rods (1) are connected with the connecting parts (20), and the first ends of the two connecting pipes (4) are respectively in one-to-one correspondence with the first mounting parts (21) and the second mounting parts (22) and are in rotation connection with a limited angle;

the connecting pipes (4) can be switched between a first state and a second state, the two connecting pipes (4) are positioned on the same straight line in the first state, and an included angle between the pull rod (1) and the connecting pipes (4) is 90 degrees; in the second state, the included angle between the connecting pipes (4) and the pull rods (1) is smaller than 90 degrees, and the second ends of the two connecting pipes (4) and the second ends of the pull rods (1) are located on the same side of the fixing seat (2).

3. The folding trailer pull rod mechanism according to claim 1, wherein the pull rod (1) comprises a first telescopic tube (11) and a second telescopic tube (12), a first end of the first telescopic tube (11) is connected with the fixed seat (2), the second telescopic tube (12) is slidably sleeved in the first telescopic tube (11), and the sliding sleeve (30) is slidably arranged on the first telescopic tube (11).

4. A folding trailer pull rod mechanism as claimed in claim 3, wherein a locking assembly (5) is arranged on the pull rod (1), the locking assembly (5) comprises a pressing plate (51), a locking piece and an elastic piece, a first through hole is formed in the first telescopic pipe (11), and a second through hole is formed in the second telescopic pipe (12);

the pressing plate (51) is arranged on the first telescopic pipe (11), and the pressing plate (51) is opposite to the first through hole;

the locking piece is sleeved in the second through hole in a sliding way, the elastic piece is arranged in the second telescopic pipe (12), and the elastic piece is connected with the locking piece;

the second telescopic tube (12) can slide to the second through hole to be aligned with the first through hole, so that the locking piece is abutted on the pressing plate (51) after passing through the first through hole.

5. A folding trailer drawbar mechanism according to claim 3, characterized in that the second telescopic tube (12) is provided with a pull handle (6).

6. A folding trailer comprising a folding chassis and a folding trailer drawbar mechanism according to any one of claims 1 to 5;

the folding bicycle frame comprises: four upright posts (71) which are arranged at intervals in a rectangular shape, a bottom support mechanism (72) which is arranged between the four upright posts (71) and is connected with the lower ends of the four upright posts (71), and a folding mechanism (73) which is connected between two adjacent upright posts (71);

the two connecting pipes (4) are in one-to-one corresponding rotary connection with the two adjacent upright posts (71).

7. The folding trailer as claimed in claim 6, characterized in that the lower end of the upright (71) is provided with a foot connection (8), the foot connection (8) comprising a fixing member (81) and a rotating member (82), the fixing member (81) being provided at the lower end of the upright (71), the rotating member (82) being rotatably connected to the fixing member (81), the rotating member (82) being rotatable in a first plane;

the connecting pipe (4) is rotatably connected with the rotating piece (82), the connecting pipe (4) can rotate in a second plane, and the first plane is perpendicular to the second plane.