KR20230164350A - Reverse three-wheel cargo bike - Google Patents

Abstract

One embodiment of the present invention includes a main frame on which a rear wheel assembly is coupled to the rear, and a loading space on the upper front side for loading a load is provided; A sub-frame disposed at the front lower part of the main frame; a pair of front wheel assemblies respectively provided at both ends of the subframe; a handle assembly supported on the main frame and controlling steering of the front wheel assembly; and a steering assembly that connects the front wheel assembly and the handle assembly and changes the traveling direction of the front wheel assembly according to rotation of the handle assembly, wherein the front wheel assembly absorbs the load transmitted from the subframe and wheel. A reverse three-wheeled cargo bike is provided, which is provided with two load support units.

Description

REVERSE THREE-WHEEL CARGO BIKE}

The present invention relates to a reverse three-wheel cargo bike, and more specifically, to a reverse three-wheel cargo bike having a front wheel assembly provided with a load support portion configured to effectively support the load transmitted from the subframe and wheels.

Bicycles are a non-polluting means of transportation that uses human power.

A typical bicycle is a two-wheeled bicycle with two wheels, with the front wheel serving as steering and the rear wheel serving as driving force. However, because two-wheeled bicycles have two wheels, they are not easy to balance, causing a problem of poor stability.

Accordingly, in order to improve the stability of the bicycle, a four-wheeled bicycle with two front and two rear wheels was developed. Although the four-wheeled bicycle has excellent stability, it has a complicated structure. Accordingly, the demand for three-wheeled bicycles with a simple structure and improved stability compared to two-wheeled bicycles with two front or two rear wheels is increasing.

However, although conventional three-wheeled bicycles have greater stability than two-wheeled bicycles, they have the problem of not being able to steer smoothly. For example, a conventional three-wheeled bicycle has a problem in that the knuckle cannot rotate smoothly because the load is concentrated on the knuckle area that rotates the wheel.

Therefore, there is a need for various research and development on three-wheeled bicycles that enable smooth steering.

Prior Document 1: Korean Patent Publication No. 10-2010-0134950 (2010.12.24)

The technical problem of the present invention to solve the above problems is to provide a reverse three-wheeled cargo bike having a front wheel assembly provided with a load support portion configured to effectively support the load transmitted from the subframe and wheels.

In order to achieve the above technical problem, an embodiment of the present invention includes a main frame to which a rear wheel assembly is coupled to the rear, and a loading space to be placed on the front upper side to provide a loading space for loading; A sub-frame disposed at the front lower part of the main frame; a pair of front wheel assemblies respectively provided at both ends of the subframe; a handle assembly supported on the main frame and controlling steering of the front wheel assembly; and a steering assembly that connects the front wheel assembly and the handle assembly and changes the traveling direction of the front wheel assembly according to rotation of the handle assembly, wherein the front wheel assembly absorbs the load transmitted from the subframe and wheel. A reverse three-wheeled cargo bike is provided, which is provided with two load support units.

In one embodiment of the present invention, the front wheel assembly includes a wheel; a wheel knuckle that rotates the wheel by power transmitted from the steering assembly; a first load support part whose lower part is coupled to the subframe and whose upper part is coupled to the wheel knuckle; and a second load support part, one side of which is coupled to the wheel and the other side of which is coupled to the wheel knuckle, wherein the first load support part and the second load support part are coupled to the wheel knuckle, and the first load support part and the second load support part are coupled to the wheel knuckle. 2 The load support part can be arranged vertically.

In one embodiment of the present invention, the first load support part includes a support housing coupled to the subframe; An upper support bearing provided within the support housing and provided on an upper portion of the support housing; a lower support bearing provided in the support housing, paired with the upper support bearing and provided at a lower portion of the support housing; and a first support pin inserted through the upper support bearing and the lower support bearing and coupled to the wheel knuckle, wherein the wheel knuckle rotates about the first support pin, and the upper support bearing and the lower support pin. The bearing may be made of a thrust bearing.

In one embodiment of the present invention, the second load support portion includes a pin support bearing provided in a support pin insertion hole formed at the center of the wheel; a spacer provided between the wheel and the wheel knuckle to secure an installation space for the first load support part; and a second support pin that is inserted through the pin support bearing and the spacer and couples the wheel and the wheel knuckle.

In one embodiment of the present invention, the front wheel assembly has an upper part coupled to the main frame and a lower part coupled to the sub-frame, and when vibration occurs during movement, it is transmitted from the main frame to the sub-frame. shock-absorbing suspension; And one end is coupled to the main frame, the other end is coupled to the sub-frame, and may include a moving guide that guides the moving direction of the sub-frame when a displacement difference occurs between the main frame and the sub-frame.

The effects of the reverse three-wheel cargo bike according to the present invention described above are explained as follows.

According to the present invention, the front wheel assembly is provided with a first load support part and a second load support part, so that the wheel knuckle can be smoothly rotated from the first load support part even if a large load is applied from the subframe and the wheel to the first load support part. . Accordingly, steering of the front wheel assembly can be achieved smoothly.

The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

Figure 1 is a perspective view of a reverse three-wheeled cargo bike according to an embodiment of the present invention as seen from the top.
Figure 2 is a perspective view of a reverse three-wheeled cargo bike according to an embodiment of the present invention viewed from the bottom.
Figure 3 is an exemplary diagram showing a state in which a handlebar adapter is coupled to an inner post according to an embodiment of the present invention.
Figure 4 is a longitudinal cross-sectional view of a handle assembly according to an embodiment of the present invention.
Figure 5 is an exemplary diagram showing a first wire fixing bracket and a second wire fixing bracket according to an embodiment of the present invention.
Figure 6 is a diagram showing the operating state of the handle steering lever according to an embodiment of the present invention.
Figure 7 is an exemplary diagram showing the connection structure of a handle steering lever, a steering transmission cable, and a steering lever according to an embodiment of the present invention.
Figure 8 is an exemplary diagram showing main parts of a steering lever according to an embodiment of the present invention.
Figure 9 is a cross-sectional view showing the coupling structure of a steering lever according to an embodiment of the present invention.
Figure 10 is a diagram showing the operating state of a steering lever according to an embodiment of the present invention.
Figure 11 is a perspective view showing a front wheel assembly according to an embodiment of the present invention.
Figure 12 is a cross-sectional view showing the coupling structure of the first load supporter and the second load supporter according to an embodiment of the present invention.
Figure 13 is a diagram showing the operating state of the wheel knuckle according to an embodiment of the present invention.
Figure 14 is a perspective view showing the suspension and movement guide unit according to an embodiment of the present invention.

The following merely illustrates the principles of the invention. Therefore, those skilled in the art will be able to invent various devices that embody the principles of the present invention and are included in the spirit and scope of the present invention, although not explicitly described or shown herein. In addition, it is understood that all conditional terms and embodiments listed herein are, in principle, expressly intended only for the purpose of ensuring that the concept of the invention is understood, and are not limited to the embodiments and conditions specifically listed as such. It has to be.

Additionally, it is to be understood that any detailed description reciting principles, aspects, and embodiments of the invention, as well as specific embodiments, is intended to encompass structural and functional equivalents thereof. In addition, these equivalents should be understood to include not only currently known equivalents but also equivalents developed in the future, that is, all elements invented to perform the same function regardless of structure.

Hereinafter, the present invention will be described with reference to the attached drawings. However, the present invention may be implemented in various different forms and, therefore, is not limited to the embodiments described herein. In order to clearly explain the present invention in the drawings, parts that are not related to the description are omitted, and similar parts are given similar reference numerals throughout the specification.

Throughout the specification, when a part is said to be “connected” to another part, this includes not only cases where it is “directly connected,” but also cases where it is “indirectly connected” with another member in between. . Additionally, when a part is said to “include” a certain component, this does not mean that other components are excluded, but that other components can be added, unless specifically stated to the contrary.

In the present invention, the upper and lower parts mean located above or below the target member, and do not necessarily mean located above or below based on the direction of gravity.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

Figure 1 is a perspective view of a reverse three-wheel cargo bike viewed from the top according to an embodiment of the present invention, Figure 2 is a perspective view of a reverse three-wheel cargo bike according to an embodiment of the present invention viewed from the bottom, and Figure 3 is a perspective view of the reverse three-wheel cargo bike according to an embodiment of the present invention. It is an exemplary diagram showing a state in which a handlebar adapter is coupled to an inner post according to an embodiment, Figure 4 is a longitudinal cross-sectional view of a handle assembly according to an embodiment of the present invention, and Figure 5 is a diagram showing a state in which a handlebar adapter is coupled to an inner post according to an embodiment of the present invention. It is an exemplary diagram showing a first wire fixing bracket and a second wire fixing bracket, Figure 6 is an operating state diagram of a handle steering lever according to an embodiment of the present invention, and Figure 7 is a handle steering lever according to an embodiment of the present invention. , It is an exemplary diagram showing the connection structure of the steering transmission cable and the steering lever, Figure 8 is an exemplary diagram showing the main part of the steering lever according to an embodiment of the present invention, and Figure 9 is an exemplary diagram showing the main part of the steering lever according to an embodiment of the present invention. is a cross-sectional view showing the coupling structure, Figure 10 is a diagram showing the operating state of the steering lever according to an embodiment of the present invention, Figure 11 is a perspective view showing the front wheel assembly according to an embodiment of the present invention, and Figure 12 is a diagram showing the operating state of the steering lever according to an embodiment of the present invention. It is a cross-sectional view showing the combined structure of the first load supporter and the second load supporter according to an embodiment of the present invention, Figure 13 is an operating state diagram of the wheel knuckle according to an embodiment of the present invention, and Figure 14 is an embodiment of the present invention. This is a perspective view showing the suspension and moving guide section according to .

As shown in Figures 1 to 6, the reverse three-wheeled cargo bike 1000 includes a main frame 100, a subframe 200, a handle assembly 300, a steering assembly 400, a front wheel assembly 500, and a rear wheel assembly 500. May include a wheel assembly 600.

The main frame 100 forms the framework of the reverse three-wheel cargo bike 1000, and the main frame 100 is configured to support various components provided in the reverse three-wheel cargo bike 1000.

A rear wheel assembly 600, which is a rear wheel, may be coupled to the rear of the main frame 100.

And a saddle 700 on which the user can sit is coupled to the rear of the main frame 100. Accordingly, the user can adjust the reverse three-wheeled cargo bike 1000 while sitting on the saddle 700.

And in front of the main frame 100, a pair of front wheel assemblies 500, which are front wheels, are provided.

This main frame 100 supports each component provided in the reverse three-wheeled cargo bike 1000 and at the same time provides a loading space 101 in which the load is placed. Accordingly, when the user rides the reverse three-wheel cargo bike 1000 while sitting on the saddle 700, the user directly checks the load loaded in the loading space 101 provided at the top of the main frame 100 and rides the reverse three-wheel cargo bike 1000. You can ride a cargo bike (1000). Therefore, if the load is separated from the reverse three-wheeled cargo bike 1000 while driving, the user can immediately check the load.

For example, a basket (not shown) may be installed in this loading space 101. The basket provides a fence around the loading space 101 to prevent the load accommodated in the loading space 101 from escaping to the outside.

Meanwhile, the handle assembly 300 is coupled to the main frame 100 and is disposed in front of the saddle 700. The user can control the steering of the front wheel assembly 500 provided on the front side of the main frame 100 by manipulating the handle assembly 300.

Such a handle assembly 300 includes a handlebar 310, a handlebar adapter 320, an inner post 330, an outer post 340, a first bearing 351, a second bearing 352, and a handle steering lever. It may include (360).

The user can adjust the driving direction of the reverse three-wheeled cargo bike 1000 while holding the handlebar 310 with his or her hand. That is, when the user rotates the handlebar 310 in the desired direction based on the axial direction of the inner post 330, the front wheel assembly 500 rotates together with the rotation of the handlebar 310, and the reverse three-wheel Steering of the cargo bike 1000 can be performed.

The handlebar adapter 320 coupled to the upper end of the inner post 330 is made detachable from the inner post 330.

Meanwhile, the inner post 330 supports the handlebar 310 and the handlebar adapter 320 and is configured to rotate together with the handlebar 310. That is, when the handlebar 310 is rotated clockwise based on the axis of the inner post 330, the inner post 330 is rotated clockwise together with the handlebar 310, and the handlebar 310 is rotated clockwise. When rotating counterclockwise, the inner post 330 is rotated counterclockwise together with the handlebar 310.

The rotational force of the handlebar 310 is finally transmitted to the front wheel assembly 500 through the inner post 330 and the steering assembly 400, so that the reverse three-wheel cargo bike 1000 can be steered.

This inner post 330 has a wire insertion hole 331 formed therein.

A number of wires can be inserted into the wire insertion hole 331 as the reverse three-wheeled cargo bike 1000 becomes electrically equipped. For example, various wires may be inserted into the wire insertion hole 331, such as a wire connected to a display, a wire for controlling a motor, and a wire for controlling a brake. In this way, as the wire insertion hole 331 is formed in the inner post 330, various wires provided in the reverse three-wheel cargo bike 1000 are not exposed to the outside. Therefore, the overall design of the reverse three-wheeled cargo bike 1000 can be neat. Alternatively, if the wire is exposed to the outside of the handle assembly 300, the wire may become caught in an external object.

Meanwhile, the lower part of the outer post 340 is coupled to the main frame 100. A post insertion hole 341 into which the inner post 330 is inserted and coupled is formed in this outer post 340.

And a first bearing 351 and a second bearing 352 are provided in the outer post 340, and the inner post 330 inserted into the post insertion hole 341 includes the first bearing 351 and the second bearing. It can be supported by (352).

This first bearing 351 is disposed on the upper side of the inner post 330 and the outer post 340 inserted into the post insertion hole 341. And the second bearing 352 forms a pair with the first bearing 351 and is disposed on the lower side of the inner post 330 and the outer post 340 inserted into the post insertion hole 341.

In this way, the outer rings of the first bearing 351 and the second bearing 352 are fixed to the inner surface of the outer post 340, and the inner rings of the first bearing 351 and the second bearing 352 are attached to the inner post. (330) is supported. Accordingly, the inner post 330 can be rotated independently from the outer post 340 while being supported by the outer post 340.

In this way, the handle assembly 300 is formed in the form of a double pipe in which the inner post 330 is inserted into the outer post 340, so that the inner post 330 with a plurality of wires inserted therein is connected to the outer post 340. It can be safely protected from the outside.

Here, the first bearing 351 and the second bearing 352, which support the inner post 330 and allow the inner post 330 to rotate independently from the outer post 340, may be made of, for example, tapered roller bearings. there is. In these tapered roller bearings, rings and rollers form a cone and are made to support axial and radial loads simultaneously. Here, the first bearing 351 and the second bearing 352 supporting the inner post 330 are not necessarily made of only tapered roller bearings, and of course, they can be made of various other bearings.

And the handle steering lever 360 is coupled to the lower part of the inner post 330. This handle steering lever 360 is configured to rotate together with the inner post 330, and the operation of the steering transmission cable 410 is controlled according to the rotation of the inner post 330.

One side of the handle steering lever 360 is coupled to the lower part of the inner post 330, and the other side of the handle steering lever 360 is coupled to one end of the steering transmission cable 410, so that the inner post 330 In the process of rotating clockwise or counterclockwise, the handle steering lever 360, which rotates together with the inner post 330, pushes or pulls the steering transmission cable 410.

In this way, the force transmitted to the steering transmission cable 410 through rotation of the inner post 330 is finally transmitted to the front wheel assembly 500, so that the reverse three-wheeled cargo bike 1000 can be steered in the right or left direction. You can.

And the handle assembly 300 may be provided with a first wire fixing bracket 371 and a second wire fixing bracket 372.

The first wire fixing bracket 371 is installed, for example, on the handlebar adapter 320 to guide the direction of wires entering the wire insertion hole 331 and prevent the wires from flowing.

And the second wire fixing bracket 372 is installed, for example, at the lower part of the main frame 100 to prevent the wires from flowing out from the wire insertion hole 331. In this way, the first wire fixing bracket 371 and the second wire fixing bracket 372 are configured to minimize the movement of the wire when vibration occurs during the driving process of the reverse three-wheel cargo bike 1000.

As shown in FIGS. 7 to 10, the steering assembly 400 connects the handle assembly 300 and the front wheel assembly 500, and changes the traveling direction of the front wheel assembly 500 according to the rotation of the handle assembly 300. It is done to convert .

This steering assembly 400 may include a steering transmission cable 410, a steering lever 420, and a tie rod portion 430.

The steering transmission cable 410 is a configuration that connects the handle steering lever 360 and the steering lever 420. As the handle steering lever 360 rotates, the steering transmission cable 410 is pushed or pulled, and the steering lever ( 420) is made to rotate. That is, the steering transmission cable 410 is configured to transmit the rotational force of the handle steering lever 360 to the steering lever 420.

Such a steering transmission cable 410 may include a first cable arm 411, a second cable arm 412, a connection cable 413, and a cable protection cover 414.

The connection cable 413 connects the first cable arm 411 and the second cable arm 412. That is, one end of the connection cable 413 is connected to the first cable arm 411, and the other end of the connection cable 413 is connected to the second cable arm 412. The first cable arm 411, the connecting cable 413, and the second cable arm 412 are formed as one body.

And the first cable arm 411 is coupled to the handle steering lever 360. And the second cable arm 412 is coupled to the steering lever 420 spaced apart from the handle steering lever 360 at a predetermined distance. Accordingly, when the handle steering lever 360 is rotated based on the axis of the inner post 330, the steering transmission cable 410 is pushed or pulled according to the rotation of the handle steering lever 360, and the steering lever 420 rotates.

This connection cable 413 is inserted through a hollow cable insertion hole formed in the cable protection cover 414. Here, one end of the cable protection cover 414 is fixed to the first cable support bracket 415 installed on the main frame 100, and the other end of the cable protection cover 414 is fixed to the second cable support bracket installed on the sub-frame 200. It is fixed at (416).

The cable protection cover 414 is configured to protect the connection cable 413 from the outside. This cable protection cover 414 is designed to prevent the connection cable 413 from being damaged by, for example, directly colliding with an obstacle existing on the road surface.

And the cable protection cover 414 not only protects the simple connection cable 413 from the outside, but also reduces vibration transmitted to the handle assembly 300 through the steering transmission cable 410.

Specifically, during the driving process of the reverse three-wheeled cargo bike 1000, the height of the main frame 100 and the sub-frame 200 are adjusted at predetermined positions due to curvature of the road surface, etc., and a displacement difference may occur.

In this way, when a displacement difference occurs between the main frame 100 and the sub-frame 200, the steering transmission cable 410 undergoes a predetermined deformation in response to the displacement difference generated between the main frame 100 and the sub-frame 200. made possible.

For example, when the connecting member connecting the handle steering lever 360 and the steering lever 420 is made of a rigid steel rod rather than a cable capable of a certain elastic deformation as in the present invention, the main frame 100 When a displacement difference occurs between and the subframe 200, the steel rod is unable to respond to the displacement difference. In addition, when a large displacement difference between the main frame 100 and the sub-frame 200 occurs during the driving process of the reverse three-wheel cargo bike 1000, the steel rod transfers the rotational force transmitted from the handle steering lever 360 to the steering lever 420. ), there is also a problem of not being able to convey it properly.

In contrast, the connection cable 413 provided in the steering transmission cable 410 according to the present invention is capable of a certain elastic deformation, so that, for example, the displacement difference between the main frame 100 and the sub-frame 200 is reduced. When generated, a predetermined elastic deformation may be achieved for the corresponding displacement difference. In addition, the connection cable 413 is configured to effectively transmit the rotational force transmitted from the handle steering lever 360 to the steering lever 420 even if there is a large displacement difference between the main frame 100 and the subframe 200.

And when a displacement difference occurs between the main frame 100 and the sub-frame 200, the connection cable 413 is elastically deformed (bent at a predetermined angle) and comes into contact with the inner surface of the cable protection cover 414. In other words, when the road surface is uneven and a displacement difference occurs between the main frame 100 and the sub-frame 200, the connection cable 413 is elastically deformed and comes into contact with the inner surface of the cable protection cover 414. In this process, vibration transmitted to the connection cable 413 may be transmitted to the cable protection cover 414 with which the connection cable 413 is in contact. That is, when vibration occurs due to the displacement difference between the main frame 100 and the sub-frame 200, the vibration transmitted to the connection cable 413 is not completely transmitted to the handle assembly 300 through the connection cable 413. , the vibration is transmitted to the handle assembly 300 in a damped state due to friction with the cable protection cover 414. Accordingly, the vibration transmitted to the handle assembly 300 through the connection cable 413 is extremely small. Accordingly, the user can stably drive the reverse three-wheeled cargo bike 1000.

Meanwhile, the steering lever 420 is installed on the subframe 200 disposed at the front lower part of the main frame 100.

This steering lever 420 is configured to rotate with the rotation of the handle steering lever 360 by coupling the other end of the steering transmission cable 410. At this time, the steering lever 420 is supported on the sub-frame 200 and is rotatable from the sub-frame 200.

This steering lever 420 may include a steering body 421, a first steering blade 422, and a second steering blade 423.

The steering body 421 is configured to connect the first steering blade 422 and the second steering blade 423.

Here, a fixing pin 424 is inserted through the steering body 421, so that the steering body 421 can be supported on the subframe 200. This steering body 421 is fixed to the subframe 200 by a fixing pin 424 and can rotate about the central axis of the fixing pin 424.

This fixing pin 424 fixes the steering lever 420 to the subframe 200 and supports the steering lever 420 so that it can rotate from the subframe 200. That is, the upper and lower portions of the fixing pin insertion hole 201 formed in the subframe 200 are provided with bushings 210 through which the fixing pin 424 is inserted, and the steering lever 420 is connected to the fixing pin 424. It can be rotated from the subframe 200 in an integrally coupled state. This bushing 210 is configured to function like a bearing, and lowers the friction between the subframe 200 and the fixing pin 424, so that the steering lever 420 can be rotated smoothly from the subframe 200.

The first steering wing 422 protrudes from the steering body 421 and is coupled to the second cable arm 412.

And the second steering wing 423 forms a predetermined angle with the first steering wing 422 and protrudes from the steering body 421. At this time, the first steering blade 422 and the second steering blade 423 may form an angle of 90°. A tie rod portion 430 is coupled to the second steering wing 423.

Here, a first tie rod 431 that transmits power to change the direction of the front wheel assembly 500 disposed on the right is coupled to one side of the second steering wing 423, and the second steering wing 423 A second tie rod 432 that transmits power to change the direction of the front wheel assembly 500 disposed on the left is coupled to the other side.

Accordingly, when the steering lever 420 is rotated, the first tie rod 431 and the second tie rod 432 are adjusted in position, and the pair of front wheel assemblies 500 arranged on the right and left are simultaneously adjusted. Rotation can occur. At this time, the pair of front wheel assemblies 500 rotate in the same direction.

As shown in FIGS. 11 to 14 , the front wheel assembly 500 may include a wheel 510, a wheel knuckle 520, a first load supporter 530, and a second load supporter 540.

The wheel 510 is a wheel that moves the reverse three-wheeled cargo bike 1000. The wheel 510 is coupled to the wheel knuckle 520, and the direction is changed by rotation of the wheel knuckle 520.

And the lower part of the first load supporter 530 is coupled to the subframe 200 disposed at the front lower part of the main frame 100, and the upper part of the first load supporter 530 is coupled to the wheel knuckle 520. This first load support portion 530 is configured to support the load transmitted from the wheel 510 and the subframe 200. Here, all loads (bike load, handle assembly load, cargo load, etc.) loaded on the main frame 100 are transferred to the sub-frame 200, and the load transferred to the sub-frame 200 is ultimately transferred to the wheel 510 and the sub-frame 200. It is transmitted to the first load support part 530 connecting the frame 200. Accordingly, a large load is applied to the first load support portion 530.

In this way, the first load support part 530 withstands the load transmitted to the first load support part 530, and the first support pin 534 provided in the first load support part 530 is connected to the wheel knuckle 520 and the first support pin 534. Since they must rotate together, the steering reaction force due to friction when the first support pin 534 rotates must be minimized. That is, the coupling structure of the first load supporter 530 that can minimize the steering reaction force of the first load supporter 530 is very important.

This first load support part 530 may include a support housing 531, an upper support bearing 532, a lower support bearing 533, and a first support pin 534.

Here, the support housing 531 may be integrally coupled to the subframe 200 through welding or the like. This support housing 531 is configured to protect the first support pin 534 provided inside from the outside.

And the upper support bearing 532 is provided within the support housing 531 and is provided on the upper part of the support housing 531. In addition, the lower support bearing 533 is configured as a pair with the upper support bearing 532 and is provided within the support housing 531, but is provided at the lower part of the support housing 531.

And the first support pin 534 is inserted through the upper support bearing 532 and the lower support bearing 533, and the head of the first support pin 534 formed on the upper part of the first support pin 534 is the wheel knuckle. It is closely coupled to (520). At this time, a nut is coupled to the lower part of the first support pin 534 so that the first support pin 534 can be integrally coupled with the wheel knuckle 520. Accordingly, when the wheel knuckle 520 rotates, the first support pin 534 rotates together with the wheel knuckle 520.

This first support pin 534 serves as the central axis of the wheel knuckle 520 when the wheel knuckle 520 is rotated by power transmitted from the tie rod unit 430.

Here, the upper support bearing 532 and the lower support bearing 533 are provided on the upper and lower sides of the first support pin 534, respectively, so that the steering reaction force of the first support pin 534 can be minimized. The upper support bearing 532 and the lower support bearing 533 may be made of thrust ball bearings that can effectively withstand the load applied in the axial direction of the first support pin 534. Accordingly, the wheel knuckle 520 can rotate smoothly while being supported on the first load supporter 530.

Meanwhile, one side of the second load supporter 540 is coupled to the wheel 510, and the other side of the second load supporter 540 is coupled to the wheel knuckle 520, so that when the wheel knuckle 520 rotates, the wheel 510 It is made to rotate.

This second load supporter 540 is configured to support the load transmitted from the wheel 510 and the subframe 200 together with the first load supporter 530. Here, the second load support part 540 is coupled to the wheel knuckle 520 while being arranged perpendicular to the first load support part 530.

This second load support part 540 may include a pin support bearing 541, a spacer 542, and a second support pin 543.

The pin support bearing 541 is provided in the support pin insertion hole 511 formed at the center of the wheel 510. This pin support bearing 541 is configured to support the second support pin 543 inserted through the pin support bearing 541. That is, one end of the second support pin 543 is coupled to the wheel 510, and the other end of the second support pin 543 is coupled to the wheel knuckle 520, and the pin support bearing 541 is connected to the wheel 510. ) is rotated independently from the second support pin 543.

And the spacer 542 is provided between the wheel 510 and the wheel knuckle 520 to secure the installation space for the first load support part 530. Accordingly, the first load support part 530 and the second load support part 540, which are arranged vertically, may be respectively coupled to the wheel knuckle 520.

And the second support pin 543 is inserted through the pin support bearing 541 and the spacer 542, and couples the wheel 510 and the wheel knuckle 520. This second support pin 543 transmits the rotational force of the wheel knuckle 520 to the wheel 510, so that the wheel 510 can change direction.

And the wheel knuckle 520 is provided with a caliper 550 that brakes the wheel 510. For example, when the user pulls the brake handle 311 (see FIG. 1) provided on the handlebar 310, the caliper 550 is in close contact with the disk 551 provided on the wheel 510, and the wheel 510 ) may be stopped. That is, the caliper 550 operates as a brake.

Meanwhile, the front wheel assembly 500 may include a suspension 560 and a movement guide unit 570.

Here, the upper part of the suspension 560 is coupled to the main frame 100, and the lower part of the suspension 560 is coupled to the sub-frame 200. This suspension 560 is configured to alleviate shock transmitted from the main frame 100 to the sub-frame 200 when vibration occurs while the reverse three-wheeled cargo bike 1000 is moving. Since this suspension 560 is a general configuration, detailed description will be omitted.

And one end of the movement guide unit 570 is coupled to the main frame 100, and the other end of the movement guide unit 570 is coupled to the sub-frame 200. This movement guide unit 570 is configured to guide the movement direction of the sub-frame 200 when a displacement difference occurs between the main frame 100 and the sub-frame 200. That is, one end of the movement guide unit 570 is hinged to the main frame 100 and guides the movement of the sub-frame 200 when the sub-frame 200 moves up and down.

However, this is only a preferred embodiment of the present invention, and the scope of the present invention is not limited by the scope of description of this embodiment.

The description of the present invention described above is for illustrative purposes, and those skilled in the art will understand that the present invention can be easily modified into other specific forms without changing the technical idea or essential features of the present invention. will be. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive. For example, each component described as unitary may be implemented in a distributed manner, and similarly, components described as distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the patent claims described below, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention.

100: main frame 101: loading space
200: Subframe 201: Fixing pin insertion hole
210: bushing 300: handle assembly
310: handlebar 311: brake handle
320: Handlebar adapter 330: Inner post
331: wire insertion hole 340: outer post
351: first bearing 352: second bearing
360: Handle steering lever 371: First wire fixing bracket
372: Second wire fixing bracket 400: Steering assembly
410: Steering transmission cable 411: First cable arm
412: second cable arm 413: connection cable
414: Cable protection cover 415: First cable support bracket
416: Second cable support bracket 420: Steering lever
421: steering body 422: first steering wing
423: second steering wing 424: fixing pin
430: tie rod part 431: first tie rod
432: second tie rod 500: front wheel assembly
510: Wheel 511: Support pin insertion hole
520: wheel knuckle 530: first load support portion
531: support housing 532: upper support bearing
533: lower support bearing 534: first support pin
540: second load support portion 541: pin support bearing
542: Spacer 543: Second support pin
550: Caliper 551: Disc
560: Suspension 570: Movement guide unit
600: Rear wheel assembly 700: Saddle
1000: Reverse three-wheeled cargo bike

Claims (5)

A main frame to which a rear wheel assembly is coupled to the rear, and a main frame to provide a loading space on the upper front side where the load is placed;
A sub-frame disposed at the front lower part of the main frame;
a pair of front wheel assemblies respectively provided at both ends of the subframe;
a handle assembly supported on the main frame and controlling steering of the front wheel assembly; and
It includes a steering assembly that connects the front wheel assembly and the handle assembly and changes the traveling direction of the front wheel assembly according to rotation of the handle assembly,
The front wheel assembly is a reverse three-wheeled cargo bike that is provided with two load support parts that support the load transmitted from the subframe and wheels.
In clause 1,
The front wheel assembly is,
wheel;
a wheel knuckle that rotates the wheel by power transmitted from the steering assembly;
a first load support part whose lower part is coupled to the subframe and whose upper part is coupled to the wheel knuckle; and
One side is coupled to the wheel, and the other side includes a second load support portion coupled to the wheel knuckle,
A reverse three-wheeled cargo bike wherein the first load support part and the second load support part are vertically arranged and coupled to the wheel knuckle.
In clause 2,
The first load support part,
a support housing coupled to the subframe;
An upper support bearing provided within the support housing and provided on an upper portion of the support housing;
a lower support bearing provided in the support housing, paired with the upper support bearing and provided at a lower portion of the support housing; and
It is inserted through the upper support bearing and the lower support bearing and includes a first support pin coupled to the wheel knuckle,
The wheel knuckle rotates around the first support pin, and the upper and lower support bearings are made of thrust bearings.
In clause 2,
The second load support part,
a pin support bearing provided in a support pin insertion hole formed at the center of the wheel;
a spacer provided between the wheel and the wheel knuckle to secure an installation space for the first load support part; and
A reverse three-wheel cargo bike comprising a second support pin that is inserted through the pin support bearing and the spacer and couples the wheel and the wheel knuckle.
In clause 2,
The front wheel assembly is,
a suspension whose upper part is coupled to the main frame and a lower part of which is coupled to the sub-frame, and which alleviates shock transmitted from the main frame to the sub-frame when vibration occurs during movement; and
One end is coupled to the main frame, the other end is coupled to the sub-frame, and when a displacement difference occurs between the main frame and the sub-frame, it includes a moving guide that guides the moving direction of the sub-frame. bike.

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