Steering mechanism of a cargo bicycle

Abstract

The invention relates to a steering mechanism of a freight bicycle, comprising a front fork, a steering rod and a handlebar which are arranged in sequence from front to rear, wherein the front end of the steering rod is connected to the front fork, and the rear end of the steering rod has a swing mechanism which is used to be connected to the handlebar and can swing forward and backward and up and down as the handlebar is turned. The advantages of the invention are that: the connection form in which one end of the steering rod is fixed and the other end can swing up and down and forward and backward can not only accurately and directly transmit the power of the handlebar steering to the front fork, but also ensure that the swing mechanism can buffer and balance the up and down displacement generated by the steering rod when turning, thereby avoiding the shaking of the freight bicycle during the travel.

Description

Technical Field

[0001] The invention relates to the field of freight bicycles, and in particular to a steering mechanism of a freight bicycle. Background Art

[0002] A cargo bike is a bicycle specially used for carrying cargo. In Europe, the usage rate of cargo bikes is extremely high, and the structural forms are also diverse. In recent years, cargo bikes have gradually been accepted in China. The difference between a cargo bike and a conventional bicycle is that there is a cargo compartment between the handlebars and the front fork. When the handlebars are turned, the handlebars control the swing of the front wheel through the connecting rod, thereby achieving steering.

[0003] The steering of existing cargo bicycles is completed in two parts, one is the rotational connection between the connecting rod and the front fork, and the other is the rotational connection between the connecting rod and the handlebar. For example, the Chinese invention application with patent number CN201780050791.0 discloses a "Bicycle Conversion Kit and Cargo Bicycle Equipment", in which the two ends of the connecting rod of the bicycle are rotationally connected to the front fork and the handlebar respectively. This form of rotation has a major disadvantage: both ends of the connecting rod are not fixed, so that the front wheel and the front fork will shake greatly when riding, resulting in unstable steering. At the same time, long-term shaking will cause gaps between parts, which will not only produce a lot of noise, but also leave safety hazards. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a steering mechanism for a freight bicycle which has a firm and stable connection and is not prone to shaking, in view of the current status of the prior art.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a steering mechanism of a freight bicycle, comprising a front fork, a steering rod and a handlebar arranged in sequence from front to rear, the front end of the steering rod is connected to the front fork, and the rear end of the steering rod has a swing mechanism connected to the handlebar and can swing forward and backward and up and down with the steering of the handlebar.

[0006] In order to ensure that steering can be achieved by turning the handlebar, the swing mechanism includes a first swing component and a second swing component connected to the bottom of the handlebar, the first swing component is partially constrained at the rear end of the second swing component and can drive the second swing component and the steering rod to swing synchronously forward and backward under the drive of the handlebar; the second swing component is connected to the rear end of the steering rod, and can make the steering rod swing forward and backward while the rear end swings up and down synchronously relative to the first swing component, so that when the handlebar is turned, the first swing component can drive the steering rod and then drive the front fork to deflect left and right to achieve steering, and the up and down swinging of the second swing component can compensate for the up and down travel difference caused by the steering.

[0007] In order to ensure that the rear end of the steering rod can swing up and down relative to the first swing assembly to compensate for the up and down travel difference caused by steering, the second swing assembly includes a connecting piece and a sleeve, the connecting piece is inserted at the rear end of the steering rod and is partially exposed, the sleeve is at least partially arranged side by side with the connecting piece, and the sleeve is rotatably connected to the connecting piece by a pin shaft that is sequentially passed through the front part of the sleeve and the connecting piece.

[0008] Specifically, the shaft sleeve comprises a shaft sleeve body and a connecting portion extending forward from the shaft sleeve body, and the pin shaft is passed through the connecting portion.

[0009] In order to ensure that the rotation of the handlebar can drive the steering rod to swing back and forth, the first swing assembly includes a swing rod and a rotating shaft, one end of the swing rod is fixed to the bottom of the handlebar, and the other end is connected to the rotating shaft, and the rotating shaft can be rotatably passed through and constrained on the shaft sleeve.

[0010] In order to prevent the rotating shaft from slipping off, the swing rod is connected to the upper end of the rotating shaft, and the lower end of the rotating shaft is also provided with a locking piece for limiting the rotating shaft from escaping from the shaft sleeve.

[0011] In order to ensure that the steering rod can be connected to the front fork, the steering rod is arranged to be tilted upward from rear to front.

[0012] Compared with the prior art, the advantages of the present invention are: in the steering mechanism of the freight bicycle, the two ends of the steering rod are respectively connected to the handlebar and the front fork, wherein the steering rod is connected to the front fork, and the steering rod and the handlebar are connected by a swinging mechanism that can swing back and forth and up and down relative to the handlebar as the handlebar is turned. In this way, one end of the steering rod is fixed and the other end can swing up and down and back and forth, which can not only accurately and directly transmit the power of the handlebar steering to the front fork, but also ensure that the swinging mechanism can buffer and balance the up and down displacement caused by the steering rod when turning, thereby avoiding shaking of the freight bicycle during travel. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the steering mechanism in an embodiment of the present invention;

[0014] Figure 2 It is a schematic diagram of the overall structure of the steering rod in an embodiment of the present invention;

[0015] Figure 3 for Figure 1 A magnified schematic diagram of center A. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below with reference to the accompanying drawings.

[0017] like Figures 1 to 3The figure shows a preferred embodiment of the present invention. In this embodiment, the steering mechanism of the cargo bicycle includes a front fork 1, a steering rod 2 and a handlebar 3. The front fork 1, steering rod 2 and handlebar 3 are arranged in sequence from front to rear, wherein the handlebar 3 is used to control the direction of the bicycle, and the front fork 1 is connected to the front wheel of the bicycle. The cargo bicycle is provided with a shelf for holding goods between the front fork 1 and the handlebar 3. Since the shelf is usually long, the handlebar 3 cannot directly control the front fork 1 to achieve steering, but steering is achieved by the steering rod 2 extending along the front and rear of the cargo bicycle, wherein the steering rod 2 is arranged to be inclined upward from the rear to the front, and the front end of the steering rod 2 is connected to the front fork 1.

[0018] In this embodiment, in order to ensure that the steering operation of the handlebar 3 can be accurately transmitted to the front fork 1, the rear end of the steering rod 2 is also connected to a swing mechanism 4. The swing mechanism 4 is not only used to connect the steering rod 2 and the handlebar 3, but also can balance the shaking caused by steering by swinging back and forth and up and down.

[0019] In this embodiment, the above-mentioned swing mechanism 4 includes a first swing component 41 and a second swing component 42 connected to the bottom of the handlebar 3. The first swing component 41 is partially constrained at the rear end of the second swing component 42 and can drive the second swing component 42 and the steering rod 2 to swing forward and backward synchronously under the drive of the handlebar 3; the second swing component 42 is connected to the rear end of the steering rod 2, and can make the steering rod 2 swing forward and backward while the rear end swings up and down synchronously relative to the first swing component 41.

[0020] The second swing assembly 42 includes a connecting member 421 and a sleeve 422. The connecting member 421 is inserted at the rear end of the steering rod 2 and partially exposed. The sleeve 422 is at least partially arranged side by side with the connecting member 421, and the sleeve 422 is rotatably connected to the connecting member 421 through a pin 423 that is sequentially inserted through the front part of the sleeve 422 and the connecting member 421. The sleeve 422 includes a sleeve body 4221 and a connecting member 422 extending forward from the sleeve body 4221. The connecting portion 4222 has a pin shaft 423 passing through it. The first swing assembly 41 includes a rocker arm 411 and a rotating shaft 412. One end of the rocker arm 411 is fixed to the bottom of the handlebar 3, and the other end is connected to the rotating shaft 412. The rotating shaft 412 is rotatably passed through and constrained on the sleeve 422. The rocker arm 411 is connected to the upper end of the rotating shaft 412, and the lower end of the rotating shaft 412 is also provided with a locking member 413 for limiting the rotating shaft 412 from being separated from the sleeve 422.

Claims

1. A steering mechanism for a cargo bicycle, comprising a front fork (1), a steering rod (2) and a handlebar (3) arranged in sequence from front to rear, characterized in that: The front end of the steering rod (2) is connected to the front fork (1), and the rear end of the steering rod (2) has a swing mechanism (4) connected to the handlebar (3) and capable of swinging forward and backward and up and down as the handlebar (3) turns. The swing mechanism (4) comprises a first swing component (41) and a second swing component (42) connected to the bottom of the handlebar (3); the first swing component (41) is partially constrained at the rear end of the second swing component (42) and can drive the second swing component (42) and the steering rod (2) to swing forward and backward synchronously under the drive of the handlebar (3); the second swing component (42) is connected to the rear end of the steering rod (2) and can make the steering rod (2) swing forward and backward while the rear end swings up and down synchronously relative to the first swing component (41); The second swing assembly (42) comprises a connecting member (421) and a shaft sleeve (422); the connecting member (421) is inserted into the rear end of the steering rod (2) and is partially exposed; the shaft sleeve (422) is at least partially arranged side by side with the connecting member (421); and the shaft sleeve (422) is rotatably connected to the connecting member (421) via a pin (423) that is sequentially inserted through the front part of the shaft sleeve (422) and the connecting member (421); The first swing assembly (41) comprises a swing rod (411) and a rotating shaft (412); one end of the swing rod (411) is fixed to the bottom of the handlebar (3), and the other end is connected to the rotating shaft (412); the rotating shaft (412) is rotatably arranged and constrained on the shaft sleeve (422).

2. The steering mechanism according to claim 1, characterized in that: The shaft sleeve (422) comprises a shaft sleeve body (4221) and a connecting portion (4222) extending forward from the shaft sleeve body (4221), and the pin shaft (423) is passed through the connecting portion (4222).

3. The steering mechanism according to claim 1, characterized in that: The swing rod (411) is connected to the upper end of the rotating shaft (412), and the lower end of the rotating shaft (412) is also provided with a locking member (413) for limiting the rotating shaft (412) from being separated from the shaft sleeve (422).

4. The steering mechanism according to claim 1, characterized in that: The steering rod (2) is arranged to be inclined from rear to front and upward.

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