WO2006002590A1

WO2006002590A1 - Tricycle and frame thereof

Info

Publication number: WO2006002590A1
Application number: PCT/CN2005/000933
Authority: WO
Inventors: Xiangyang Zhang
Original assignee: Xiangyang Zhang
Priority date: 2004-07-01
Filing date: 2005-06-27
Publication date: 2006-01-12
Also published as: CN1976841A; CN1319803C; CN1594014A; CN100453394C

Abstract

A tricycle and a frame thereof are provided in the present invention. The frame includes a main frame and a rear axle connecting device mounted at the rear portion of the main frame. The main frame consists of an upper rod, a lower rod, a front rod and a back stand rod. The rear axle connecting device comprises a guide member, a connecting plate assembly and a supporting member. The frame of the present invention has some advantages, such as simpler structure, smaller volume and lighter weight, thus is easier to be manufactured and transported. The tricycle using this frame is small in volume, stable in traveling and braking, difficult to berolled and comfortable for users. It can be used widely as a vehicle, a pram, etc., for recreations, sports, traveling, delivering goods and so on. It can be further modified to an electrical tricycle, a motorcycle, etc., with battery, motor or engine.

Description

Tricycle and its frame

[Technical Field]

The present invention relates to a tricycle and a frame thereof, and more particularly to a small, lightweight tricycle and its frame.

【technical background】

When a tricycle is driving slowly on a straight road, its stability and safety are better than bicycles. Therefore, tricycles are widely used in baby carriages and are a common means of transportation in some small and medium-sized cities and rural areas. However, the structure of the existing tricycle frame is complicated, the "body shape" is too large, the body is heavy, and the front wheel and the rear wheel are only braked when braking, and the body is easy to turn over when driving on an uneven road, fast turning or emergency braking. Today, with the shortage of road resources, the increasing traffic congestion, and the increasing awareness of people's safety, tricycles are naturally "blocked" in some large and medium-sized cities in China.

As a closest comparative document of the present invention, the Chinese patent document of ZL 90212599.0 discloses an improved bicycle frame which is said to be used both as a bicycle frame and as a tricycle frame to realize one frame. use. However, since the rear axle is a dead shaft for assembly, it is inevitable that the front wheel drive is practically impossible, such as the use of the rear wheel drive and the mounting of the brake device, and the front wheel drive is practically impossible, so the invention is difficult to implement. The Chinese patent documents of ZL 98227086.0 and ZL 88201411.0 each disclose an anti-rollover tricycle. Since the invention does not propose a technical solution of the double rear wheel synchronous brake, the anti-rollover problem can only be solved to a certain extent, and the ordinary problem is not solved. The structure of the tricycle frame is complicated, the "body shape" is too large, the body is heavy, and it is difficult to package and transport.

[Summary of the Invention]

In view of the above drawbacks existing in the prior art, one of the objects of the present invention is to provide a lightweight tricycle frame that is simple in structure, small in space, light in weight, easy to process, and convenient for packaging and transportation; another object of the present invention is to It provides a lightweight tricycle that is stable and safe to travel, is not easy to turn over, and can be used as a transportation means and has many uses.

One of the objects of the present invention is achieved by the following technical solution: a lightweight tricycle frame including a main frame composed of an upper pipe, a lower pipe, a front pipe, and a rear riser, and a rear axle installed at the rear end of the main frame a connecting device, the rear axle connecting device comprises a guiding member, a connecting piece assembly and a supporting member; the connecting piece assembly comprises a connecting piece symmetrically arranged on the left and right sides and a bearing mounted on the connecting piece, the guiding The front end of the piece is connected with the lower end of the main frame, the rear end of the piece is connected with the connecting piece assembly, the upper end of the supporting member is connected with the main frame, and the lower end is connected with the rear part of the guiding piece or the connecting piece assembly; left and right The connecting tube can be installed laterally between the connecting pieces.

1 Confirmation Another object of the present invention is achieved by the following technical solutions: a lightweight tricycle including a frame, a front fork, a handlebar or a steering lever, a brake, a front wheel and a pair of rear wheels, the frame including a main frame composed of an upper pipe, a lower pipe, a front pipe and a rear riser, and a rear axle connecting device installed at a rear end of the main frame, wherein the rear axle connecting device comprises a guiding member, a connecting piece assembly and a supporting member; The connecting piece assembly comprises a connecting piece symmetrically arranged on the left and right sides and a bearing mounted on the connecting piece for supporting the rear axle, the front end of the guiding piece is connected with the rear lower end of the main frame, and the rear end and the connecting piece are connected The assembly is connected, the upper end of the support member is connected with the main frame, and the lower end is connected with the rear part of the guide member or the connecting piece assembly; the connecting tube can be installed laterally between the left and right connecting pieces, and the outer side is symmetrically mounted There are ordinary bicycle brakes.

The advantages of the lightweight tricycle frame of the present invention are -

1. Simple structure, small size and light weight. The frame of the present invention is substantially the same as the bicycle, except that the rear axle and the fork are replaced by the rear axle connecting device. Compared with the ordinary tricycle, the frame structure of the invention is greatly simplified, and the space is small and the weight is light. .

2, easy to process, easy to package and transport. In addition to the rear axle connecting device, the present invention can adopt existing bicycle standard components, so that it is easy to process and easy to implement; the main frame of the present invention and the rear axle connecting device can be screwed together, so that the frame can be realized. Split packaging, which can greatly reduce the packaging volume, and help reduce packaging and transportation costs.

The advantages of the tricycle of the present invention assembled with the above-described frame are:

1, small and light. The length of the lightweight tricycle of the present invention is the same as that of a normal bicycle, and the width can be selected between 300 and 800 mm. The body is slightly heavier than the bicycle. This type of "small" tricycle can be used as a general transportation means like a bicycle in urban and rural areas. use.

2. It is not easy to turn over, drive safely, and ride comfortably. The present invention uses two measures to prevent the turning side: First, in most embodiments, the guide member and the main frame use "two-stage hinge" or the guide member itself can produce "twist deformation", and in the connecting piece assembly and A shock absorber is installed between the main frame. When the rear wheel hits an obstacle or the vehicle turns, the body can still maintain balance and avoid turning over. The use of shock absorbers also greatly improves the comfort of the ride. The double rear brakes overcome the defects of most of the existing tricycles with single rear brakes, easy deviation and overturning when braking, and increase brake reliability and driving safety. Although some of the embodiments of the present invention are not equipped with a shock absorber, the double rear wheel brakes are used to have a function of preventing the turning side to some extent.

3. Wide range of uses. The invention can be used as a general traffic transportation tool by human power drive, or can be developed as a baby carriage, a recreational vehicle, a exercise bicycle, a recreational vehicle, a tourist car, a delivery car, etc., and is equipped with a battery, an electric motor or an internal combustion engine, and can further It has been improved into a lightweight three-wheeled electric vehicle, a lightweight three-wheeled electric vehicle, a light three-wheeled motor vehicle and a disabled vehicle. [Description of the Drawings]

Figure 1 is a perspective view of the large flat fork + large vertical fork rear axle connecting device

Fig. 2 is a perspective view of another scheme of the large flat fork + large vertical fork rear axle connecting device. Fig. 3 is a perspective view of the large flat fork + shock absorber rear axle connecting device

Figure 4 is a perspective view of the small flat fork + small vertical fork rear axle connecting device

Figure 5 is a schematic diagram of the flat fork

Figure 6 is a perspective view of the small flat fork + shock absorber rear axle connecting device

Figure 7 is a perspective view of the bushing guide plate + shock absorber type rear axle connecting device

Figure 8 is a schematic view of the casing guide plate

Figure 9 is a perspective view of the grooved guide plate + shock absorber rear axle connection

Figure 10 is a schematic view of the grooved guide plate

Figure 11 is a perspective view of another type of grooved guide plate + shock absorber rear axle connection device. Figure 12 is a perspective view of the guide pipe + shock absorber rear axle connection device.

Figure 13 is a perspective view of the guide block with the front round bar

Figure 14 is a perspective view of the T-shaped guide rod + shock absorber rear axle connection device

Figure 15 is a perspective view of the T-shaped guide bar

Figure 16 is a perspective view of the guide block with a round tube at the front

Figure 17 is a perspective view of another scheme of the T-shaped guide rod + damper type rear axle connecting device. Figure 18 is a perspective view of the frame type guide frame.

Figure 19 is a perspective view of the connecting piece assembly with connecting tubes

Figure 20 is a left-right symmetrically arranged brake (brake box with a brake ring). Figure 21 is a perspective view of a brake assembly (a lock box with a brake ring) on the connecting piece assembly. Figure 22 is a view of the present invention. Schematic diagram of front set of riser sleeve

23 is a schematic view showing a rear embodiment of a riser sleeve according to the present invention;

Figure 24 is a schematic view showing the embodiment of the vertical tube sleeve according to the present invention

Fig. 25 is a schematic diagram showing the outer gear transmission of the handlebar or the steering rod and the front fork riser by the bevel gear. Fig. 26 is a schematic diagram of the inner gear transmission of the handlebar or the steering fork and the front fork riser using the bevel gear. Fig. 27 is the handlebar or the steering lever and the front Schematic diagram of universal joint transmission for fork riserFig. 28 is a flexible ring belt drive diagram for handlebar or steering rod and front fork riser. Figure 29 is a schematic diagram of double rocker transmission for handlebar or steering rod and front fork riser. Figure 30 is a perspective view of the main frame of the present invention for the use of thin steel sheets or aluminum alloy sheets. Figure 31 is a perspective view of the upper and lower tubes used in the main frame of the present invention. Figure 32 is a preferred embodiment of the lightweight three-wheeled bicycle of the present invention. Embodiment effect chart In the picture - main frame 1 upper tube 2 lower tube 3 front tube 4 rear riser 5 rear axle connection 6 steering transmission 7 brake 8 rear axle 9 shaft sleeve 10 handlebar or steering lever 11 riser sleeve 12 Handlebar adjustment bracket Front fork 14 Front fork riser 15 Seat 16 Seat mounting tube 17 Ankle member 18 Guide member 61 Connection piece assembly 62 Support member 63 Flat fork 611 Flat fork tab 612 with sleeve guide plate 613 Grooved guide plate guide tube 615 T-shaped guide rod 616 Guide block 617 Guide frame 618 Left and right connecting piece 621, 62 Connecting tube 622 Bearing 623 Vertical fork 631 Shock absorber 632 Bevel gear 71A, intermediate bevel gear 72 Bevel gear 73 A Inner cone Gear 73B Universal Coupling 74 Pulley 75A, 75B Guide pulley 76 Flexible ring belt 77 Rocker 78A, 78B Link 79 Left and right brake boxes 81, 81 ' Left and right brake rings 82, 82 ' Left and right cranks 83 , 83 ' crank turn connecting rod 84 brake line connector 85

【detailed description】

Preferred Embodiment: This embodiment is a lightweight three-wheeled bicycle with a rear axle with a shock absorbing device. As shown in FIG. 14 and FIG. 32, the lightweight three-wheel bicycle frame includes a main frame 1 composed of an upper tube 2, a lower tube 3, a front tube 4, and a rear riser 5, and is mounted on the rear end of the main frame 1. Shaft connection device 6. The rear axle connecting device 6 adopts a T-shaped guiding rod + shock absorber type structure, and the device is composed of a guiding member 61, a connecting piece assembly 62 and a supporting member 63, wherein the guiding member 61 includes a T-shaped guiding rod 616 and a front belt with a circle The guide block 617 of the tube (Fig. 15, Fig. 16), the connecting piece assembly 62 includes left and right connecting pieces 621, 621', two connecting tubes 622, 622 and rolling bearings 623, 623 (Fig. 19), and the supporting member 63 is A pair of shock absorbers 632, 632 symmetrically disposed left and right. As shown in FIG. 16, the rear end of the guiding block 617 is laterally provided with three circular holes, wherein the middle circular hole has a larger aperture than the rear shaft 9, so as to cooperate with the rear axle 9, so that the rear axle 9 can freely run therein, and the other two. The circular holes are used for mounting two connecting pipes 622, 622. The front pipe extending forwardly from the front end of the guiding block 617 is hinged with the T-shaped guiding rod 616; the left and right connecting pieces 621 621 are spaced 300 mm apart, and the bearing 623, 623 is mounted in the middle of the connecting pieces 621, 621, and the two connecting pipes 622, 622 are fixed to the guiding block 617 through the circular hole at the rear end of the guiding block 617, and are screwed to the left and right connecting pieces 621, 621. The spacing between the inner sides of the two connecting tubes 622, 622 is 80 mm, so that the flywheel operates without interference. The T-shaped end of the T-shaped guide rod 616 is hinged to the rear lower end of the main frame 1, and the two connecting tubes 622, 622 pass through the left and right shock absorbers 632, 632. The upper end of the rear riser 5 is elastically connected. In order to force the two connecting pipes to be hooked, a shock absorber frame is installed between the lower end of the shock absorber and the connecting pipe. At the time of installation, a gap of 30 mm is reserved between the right damper 632 and the guide block 617 to mount the flywheel.

As shown in Fig. 32, the front fork 14 is attached to the front tube 4 of the above frame, and the handlebar and the front wheel of the 20" are attached to the upper and lower ends of the front fork 14, respectively, and the bearing 623 of the connecting piece assembly 62 is attached. 623 is equipped with a rear axle 9 having a length of 500 mm. The rear axle 9 passes through a predetermined circular hole in the guiding block 617, one end is fixed to one rear wheel, and the other end is coupled with another rear wheel through a bearing to form Differential rotation, both rear wheels have a wheel diameter of 20 〃; a middle shaft is mounted in the center shaft bushing 10, and an ankle member 18 with a 48-tooth chain plate is mounted on the center shaft, on the rear axle 9 and the chain plate A 16-tooth flywheel is attached to the corresponding part, and a chain is installed between the chain plate and the flywheel. To prevent the flywheel from being unchained, a guide wheel can be added to the front end of the flywheel; as shown in Fig. 20 and Fig. 21, the brake of this embodiment 8The ordinary bicycle brake is used, the brake is a pair and symmetrically arranged. When installing, the left and right connecting pieces 621 and 621 are installed, and the outer side is equipped with the brake boxes 81, 81' with the holding brake rings 82, 82'. Attach a crank connecting rod 84 between the cranks 83, 83' on the brake ring, and install a brake in the middle of the crank connecting rod 84 In the in-line connector 85, a brake disc is mounted on the inner side of the sleeves of the two rear wheels and the corresponding positions of the brake boxes 81 and 8Γ (in other embodiments, a brake or a disc brake may be used, and the installation method is the same as this example). ), install the brake lever on the handlebar, install the brake wire between the brake lever and the brake cable connector 85, install the ordinary brake components on the front wheel, and install the saddle on the upper end of the rear riser 5, before and after. A fender is attached to the outside of the wheel, and a lightweight three-wheeled bicycle is assembled.

The main frame 1 of the present embodiment can adopt the existing bicycle frame, and the assembled lightweight tricycle has the same outer shape as the existing bicycle, and has a length, width and height of about 1600 mm X 500 mm X 800 mm. Therefore, as long as the bicycle can be on the road, the present invention has a reason to be on the road. Since the embodiment adopts "two-stage articulation" (the T-shaped guide rod 616 is first-stage hinged with the rear lower end of the main frame 1, and the second block is hinged with the guide block 617), and the shock absorber is installed, the rear wheel is When one side hits an uneven road surface, the left and right swings and the up and down bumps of the vehicle body can be greatly reduced. When the vehicle is turned, the rider can obtain the centripetal force by tilting the body and the body at a certain angle like a bicycle, so that the vehicle does not turn over. The invention installs a double brake device on the rear wheel, and together with the front wheel brake component constitutes a reliable brake system, and the two rear wheels are evenly stressed when braking, which can prevent the vehicle from being deflected and turned over to a certain extent, thereby greatly improving the vehicle. Driving safety. In addition to the rear axle connecting device 6, the other components can adopt the existing bicycle standard components. In this embodiment, the cooperation of the chain plate, the flywheel and the rear wheel makes it possible to obtain 15 kilometers under the normal pedaling frequency. The speed of the left and right. Therefore, the present invention has the advantages of simple structure, small size and lightness, stable and safe driving, difficulty in turning over, comfortable riding, and easy implementation, so that it can be widely used as a general transportation means in urban and rural areas.

In addition to the manual drive described in this embodiment, a battery is mounted on the frame of the present invention. The electric motor or internal combustion engine can be further improved into a lightweight three-wheel electric vehicle, a lightweight three-wheeled electric vehicle or a light three-wheeled motor vehicle. These lightweight tricycles can be used not only for transportation, but also for leisure, fitness, recreation, travel, delivery or for the production of baby carriages and disabled vehicles.

The greatest improvement of the present invention is in the rear axle coupling 6 as compared to the prior art. The rear axle coupling device 6 includes a guide member 61, a web assembly 62 and a support member 63, each of which performs a different function, and the components are also composed of a plurality of different methods.

1. Guide member: The function of the guide member 61 is mainly to guide the rear axle 9, that is, to position the rear axle, regardless of whether the front end and the main frame 1 are fixed or hinged, it is ensured that the rear axle 9 does not generate axial direction. swing. The composition of the guiding member 61, in addition to the T-shaped guiding rod 616 and the tubular guiding block 617 of the preferred embodiment, can also be connected with the left and right fork tubes through the one or two flat fork small tubes. 611 (Fig. 1 - Fig. 4, Fig. 6), a guide plate 613 (Fig. 8) with a sleeve at one end, a grooved guide plate 614 (Fig. 10), a hinged guide tube 615 and a round bar guide block 617 (Fig. 12. Figure 13) and the T-shaped guide bar 616 and the guide frame 618 (Fig. 17, Fig. 18) and the like which are hinged to each other. A pair of flat fork tabs 612, 612 can be added to the rear end of the flat fork 611 as needed. As shown in FIG. 5, the semi-elliptical sheet or rectangular sheet-shaped flat fork tabs 612 and 612 are fixed to the rear end of the flat fork 611. , which is provided with three fitting grooves which are matched with the two connecting pipes 622, 622 and the rear axle 9 and open downward, wherein the middle fitting groove has a larger hole diameter than the rear axle 9, so that the rear axle 9 can freely run therein, The mounting grooves on both sides are used to install two connecting pipes 622, 622, and the spacing of the flat fork tabs 612, 612 is selected between 80-300 mm, and is installed between the left and right connecting pieces 621, 621, A screw hole is provided thereon for facilitating detachable connection with the connecting piece assembly 62. According to the size of the left and right forks of the flat fork 611 to the sides, it can be divided into a large flat fork and a small flat fork. The small flat fork is roughly the same as the ordinary bicycle flat fork, and the rear end of the large flat fork is wider than the ordinary bicycle flat. cross. The flat fork 611 front end and the main frame 1 can be fixed or screwed.

2. Connecting piece assembly: The connecting piece assembly 62 has two functions: one is to make an intermediate connection between the guiding member 61 and the supporting member 63 and the rear axle 9, and through the bearing 623 on the connecting piece 621, 621 ' 623, the rear axle 9 is installed; the second is to provide a mounting plane to position the brakes 8. As shown in FIG. 19, the connecting piece assembly 62 includes left and right connecting pieces 621, 621, two parallel connecting pipes 622, 622 made of metal pipes, and rolling bearings 623, 623, connecting pieces 621, 621, which are round Sheet or elliptical, made of sheet metal, bearings 623, 623 are mounted in the middle of the connecting pieces 621, 621 ', connecting the ends of the tubes 622, 622 and the left and right connecting pieces 621, 621, fixed or screwed Connected, the connecting piece is provided with a plurality of screw holes for mounting the brake 8 and the fender. The spacing between the left and right connecting pieces 621, 621' is selected between the range of 100-600 mm, generally 200-400 mm, and the spacing is about 400-600 mm after the rear axle and the two rear wheels are mounted. Two connecting tubes 622, 622 The spacing between the inner sides of the pipe wall is selected between 90 ± 30mm, typically 70-80mm. This spacing does not interfere with the operation of the flywheel after the 16 or 18-toothed flywheel is installed. In some embodiments, the tab assembly 62 may also be provided with no or only one connecting tube, as shown in FIG.

3. Support member: The support member 63 functions as "support" or "suspension", that is, the load at the rear of the vehicle body is transmitted through the support member 63 to the link assembly 62 and the rear axle 9 to the rear wheel. The support member 63 is selected between the vertical fork 631 or the damper 632 by a fixed or elastic connection between the guide member 61 or the link assembly 62 and the main frame 1. As shown in FIG. 1 , FIG. 2 and FIG. 4 , the vertical fork 631 is formed by fixing the left and right fork tubes through one or two vertical fork tubes, and the shock absorbers 632 and 632 are a pair and the left and right sides are symmetric or juxtaposed. . In order to shorten the width of the main frame 1, the spacing between the upper ends of the left and right shock absorbers 63.2, 632 can be smaller than the spacing of the lower ends thereof, and the left and right shock absorbers 632, 632 can be symmetrically arranged, while the left and right shock absorbers 632, 632 End rod joint bearings must be installed on the upper and lower ends. According to the size of the left and right forks of the fork 611 to the sides, it can be divided into a large fork and a small fork. The small fork is roughly the same as the ordinary bicycle fork. The large and small forks can be used as needed. Or choose with large and small flat forks. The fork 631 or the damper 632, 632 and the guide member 61 should have a certain gap (usually 25-40 mm) on the same side to install the flywheel and operate it without interference.

In addition to the preferred embodiment, the rear axle coupling 6 has the following options:

1, Daping fork + Da Li fork type. As shown in Fig. 1, the solution includes a large flat fork 611, a large fork 631, left and right connecting pieces 621, 621, and bearings 623, 623 mounted in the middle of the connecting piece. The front end of the flat fork 611 is connected to the rear end of the lower tube 3, the upper end of the vertical fork 631 is connected to the upper end of the rear riser 5, the rear end of the flat fork 611 and the lower end of the vertical fork 631 are respectively connected with the left and right connecting pieces 621, 621, Docked. In this embodiment, the flat fork 611 and the lower tube 3, the vertical fork 631 and the rear riser 5, and the left and right connecting pieces 621, 621 ' can be screwed together for packaging and transportation.

As shown in FIG. 2, in this example, the connecting pipes 622 and 622 can be installed between the left and right connecting pieces 621 and 621' to form another embodiment. Adding two connecting pipes can make the solution more secure and reliable. .

2, large flat fork + shock absorber type. As shown in FIG. 3, the solution includes a large flat fork 611, left and right shock absorbers 632, 632, and a web assembly 62 with connecting tubes 622, 622. The front end of the flat fork 611 is hinged to the rear end of the lower tube 3, and the rear end sides of the flat fork 611 are fixed to the left and right connecting pieces 621, 62Γ or directly connected to the two connecting tubes 622, 622; the rear end of the flat fork 611 or the connection The sheet assembly 62 and the upper end of the rear riser 5 are elastically connected by the dampers 632, 632.

3, small flat fork + small vertical fork. As shown in FIG. 4, the solution includes a small flat fork 611, flat fork tabs 612, 612 fixed to the rear end of the flat fork 611, a small vertical fork 631, and a connecting piece assembly 62 with connecting tubes 622, 622. The front end of the flat fork 611 is connected to the rear end of the lower tube 3, the upper end of the vertical fork 631 is connected to the upper end of the rear riser 5, and the lower end is connected to the rear end of the flat fork 611 or the flat fork tabs 612, 612, and the flat fork tab 612, 612 and the two connecting tubes 622, 622 are detachable connection. In this example, the flat fork 611 and the lower tube 3, the vertical fork 631 and the rear riser 5, and the flat fork tabs 612, 612 may be screwed.

4, small flat fork + shock absorber type. As shown in FIG. 6, the solution includes a small flat fork 611, flat fork tabs 612, 612 fixed to the rear end of the flat fork 611, left and right shock absorbers 632, 632, and a connecting piece assembly with connecting tubes 622, 622. 62. The front end of the flat fork 611 is hinged to the rear end of the lower tube 3, the flat fork tabs 612, 612 and the connecting tubes 622, 622 are detachably connected, the flat fork tabs 612, 612 or the connecting piece assembly 62 and the rear riser 5 The elastic connection is achieved by the left and right shock absorbers 632, 632.

5, with casing guide plate + shock absorber type. As shown in Figures 7 and 8, the solution includes a front end sleeved guide plate 613, left and right shock absorbers 632, 632, and a web assembly 62 with connecting tubes 622, 622. The sleeve guide plate 613 is hinged to the rear end of the lower tube 3, and the other end is connected to the two connecting tubes 622, 622, and is elastically hinged by the left and right shock absorbers 632, 632 and the rear riser 5. The casing guide plate 613 is made of thin steel plate and can produce a certain "twisted deformation". In this example, it should be noted that the axial lines of the bearings 623, 623 on the left and right connecting pieces 621, 62 should be on the lower side of the connecting lines 622, 622, so that the operation of the rear shaft 9 is not interfered. .

6, slotted guide plate + shock absorber type. As shown in FIG. 9 and FIG. 10, the solution includes a grooved guide plate 614, left and right shock absorbers 632 and 632, and a connecting piece assembly 62 with connecting pipes 622 and 622. The rear end of the grooved guiding plate 614 is laterally disposed. There are three round holes, wherein the round holes on the front and rear sides are used for mounting the connecting pipes 622, 622, and the middle round holes are clearance-fitted with the rear axle 9, and the front end of the grooved guide plate 614 is hinged with the rear end of the lower pipe 3, and the rear end thereof The connecting pipes 622, 622 are laterally fixed, and the grooved guide plates 614 or the connecting pipes 622, 622 are elastically connected to the upper ends of the rear risers 5 through the left and right shock absorbers 632, 632. The channel guide plate 614 is made of a thin steel plate to produce a certain "twisted deformation".

Figure 11 is a perspective view of another scheme of the grooved guide plate + damper type rear axle connecting device, which is basically the same as the above example, except that the guiding member 61 further includes a T-shaped guiding rod 616, a T-shaped guiding rod The T-shaped end of the 616 is hinged to the front end of the grooved guide plate 614, and the other end is hinged to the lower tube 3.

7, guide tube + shock absorber type. As shown in FIG. 12, the solution includes a guiding tube 615, a guiding block 617, left and right shock absorbers 632, 632 and a connecting piece assembly 62 with connecting tubes 622, 622; a front end of the guiding block 617 extends longitudinally There are three circular holes in the lateral direction of the rear end, wherein the round holes on the front and rear sides are used to install the connecting pipes 622, 622, and the round holes in the middle are matched with the rear axle 9 (Fig. 13), and the guiding pipe 615 is fixed on the main pipe At the rear lower end of the frame 1, the round rod at the front end of the guide block 617 is hinged with the guide tube 615, and the rear end thereof is laterally connected with the two connecting tubes 622, 622. The connecting tubes 622, 622 pass through the left and right shock absorbers 632, 632 and rear. The upper end of the riser 5 is elastically connected.

8, T-shaped guide rod + shock absorber type. This solution is a modification of the preferred embodiment. As shown in FIG. 17 and FIG. 18, the solution includes a T-shaped guide bar 616, a guide frame 618, left and right shock absorbers 632, 632 and a connecting piece assembly 62 with connecting pipes 622, 622; the guiding frame 618 is a frame structure, the front part of the front part is provided with two circular holes, and the two sides of the rear end are horizontally provided with three circular holes, wherein the front and rear two The round holes are used to mount the connecting pipes 622, 622, and the middle round holes are clearance-fitted with the rear axle 9 (Fig. 18); the T-shaped end of the T-shaped guide rod 616 is hinged to the rear lower end of the main frame 1, and the other end passes through the guide frame 618. Two circular holes are disposed in the longitudinal direction of the front portion, and the rear end of the guide frame 618 is laterally connected to the two connecting pipes 622, 622. The connecting pipes 622, 622 pass through the left and right shock absorbers 632, 632 and the rear riser. 5 The upper end achieves an elastic connection. The guide frame 618 is made of a thin steel plate to produce a certain "twisting deformation".

The present invention can also be further improved by changing the "riding" tricycle in the above embodiment to a "sitting" tricycle. The improved method is to add a riser sleeve 12. As shown in Fig. 22-24, the riser sleeve 12 is mounted on the front side of the front tube 4, or on the rear side or the upper side of the front tube 4, and the handlebar or steering rod 11 of the tricycle is inserted into the riser sleeve 12 Medium (tricycle can use steering wheel steering, in which case a steering rod is required), and the front fork riser 15 in the front fork 14 is conventionally inserted into the front tube 4, between the handlebar or steering rod 11 and the front fork riser 15 The "transmission connection" is achieved by the steering transmission member 7, that is, by the steering transmission member 7, the rotation of the handlebar or the steering lever 11 is "transmitted" to the front fork $tube 15, the front fork riser 15 and the handlebar or steering lever 11 Rotate in the same direction. The following options are available for the drive connection:

1. Bevel gear external meshing drive. As shown in FIG. 25, the steering transmission member 7 of the present embodiment includes bevel gears 71A, 71B and an intermediate bevel gear 72. The bevel gear 71A is fixed to the handlebar or the steering lever 11, and the bevel gear 71B is fixed to the front fork riser 15, In order to keep the direction of rotation uniform, the two are externally meshed with each other through the intermediate bevel gear 72. The steering ratio of the solution can be freely selected, and the riser sleeve 12 can be mounted on the front side or the rear side of the front tube 4, which is suitable for both steering wheel steering and steering of the handlebar. When the riser sleeve 12 axis is parallel to the front fork riser 15 axis, the above-described bevel gears 71A, 71B and the intermediate bevel gear 72 can be replaced with cylindrical gears.

2. The internal gear of the bevel gear. As shown in FIG. 26, the steering transmission member 7 of the present embodiment includes a bevel gear 73Α and an inner bevel gear 73Β. The bevel gear 73 is fixed to the handlebar or the steering lever 11, and the inner bevel gear 73 is fixed to the front fork riser 15 and The bevel gear 73 is meshed internally. This solution can obtain a suitable steering ratio, which is suitable for steering the steering wheel. The riser sleeve 12 can be mounted on the front or rear side of the front tube 4. When the axis of the riser sleeve 12 is parallel to the axis of the front fork riser 15, the above-described bevel gear 73Α and the inner bevel gear 73Β can be replaced with a cylindrical gear and an internal cylindrical gear.

3. Universal coupling drive. As shown in FIGS. 24 and 27, the steering transmission member 7 of the present embodiment includes a universal joint 74, and the handlebar or steering rod 11 is drivingly coupled to the front fork riser 15 via a universal joint 74. The utility model has the advantages of simple structure and reliable steering, and the steering transmission ratio is 1:1, which is suitable for the embodiment of the steering of the handlebar, and the universal coupling 74 can adopt the standard parts, and the riser sleeve 12 can only be installed in front. The upper side of the tube 4. The adjustment frame 13 must be added by adopting this scheme, and the angle of the handlebar 11 can be adjusted, which is suitable for people of different ages.

4. Flexible loop belt drive. As shown in FIG. 22, FIG. 23 and FIG. 28, the steering transmission member 7 of the present embodiment includes pulleys 75A, 75B, a pulley pulley 76 and a flexible loop belt 77; the pulley 75A is fixed to the handlebar or the steering lever 11, The pulley 75B is fixed to the front fork riser 15, and the pulley 76 is mounted between the two pulleys and mates with the flexible loop belt, and the pulleys 75A and 75B are interactively connected by the flexible loop belt 77. The flexible loop belt 77 of the present solution can be replaced by a steel wire rope. When the handlebar or the steering rod 11 is parallel to the axis of the front fork riser 15, the guide pulley 76 can be omitted (Fig. 23). This scheme is simple to process and install, and the steering transmission It is freely selectable, suitable for both steering wheel steering and handlebar steering. The riser sleeve 12 can be mounted on the front side or the rear side of the front tube 4.

5, double rocker drive. As shown in FIG. 29, the steering transmission member 7 of the present embodiment includes rockers 78A, 78B and a connecting rod 79. The rocker 78A is fixed to the handlebar or the steering rod 11, and the rocker 78B is fixed to the front fork riser 15, End rod joint bearings are mounted at both ends of the rod 79, and the rockers 78A, 78B are hinged to each other by a connecting rod 79. The scheme has simple structure and reliable transmission, and the steering transmission ratio is 1:1. The riser sleeve 12 can be installed on the front side or the rear side of the front tube 4, and is suitable for the embodiment in which the handlebar is turned.

In conjunction with the above improvements, the saddle of the tricycle can be changed to the seat 16, and the riding mode of the tricycle is changed from the original "riding type" to "sitting type", in which case the ankle member 18 is still clamped as usual. Between the rear wheels, in order to maintain the balance of the center of gravity of the front and rear wheels, it is necessary to increase the wheelbase and increase the length of the car. The solution to this problem is to advance the center axle bushing 10 to the proper position on the rear side of the front wheel (Fig. 22-24) so that the left and right ankles in the ankle member 18 are sandwiched between the front wheels. In order to avoid motion interference with the front wheel steering when pedaling, the front wheel can be used with small wheel (16〃, 18" or 20") and extended center shaft. As shown in FIG. 30 and FIG. 31, in order to facilitate the installation of the middle axle sleeve 10, the riser sleeve 12, the seat mounting tube 17, the rear riser 5 and the rear shock absorbers 632, 632, the main frame of the present modification 1 It can be processed by thin steel plate or aluminum alloy plate, or the upper pipe 2 and the lower pipe 3 can be changed from single pipe to parallel pipe. At this time, if the battery and motor are installed in the lower tube 3, the portable three-wheel bicycle can be changed to a portable three-wheel electric bicycle or a portable three-wheel electric bicycle.

The advantages of the above improvement scheme are as follows: 1. The vehicle length can be further shortened, so that the tricycle can be made smaller; 2. The center of gravity is low, it is not easy to turn over when driving, and it is more stable and safe; 3. Replace the original saddle with a seat. To make riding more comfortable; 4, can use steering wheel steering, making driving more fun. The above improvement scheme cooperates with the embodiment described in Figs. 1 to 18 to make the present invention more perfect.

Claims

Spur request

1. A lightweight tricycle frame comprising a main frame (1) consisting of an upper pipe (2), a lower pipe (3), a front pipe (4), and a rear riser pipe (5) and mounted on the main frame ( 1) a rear axle connecting device (6), characterized in that: the rear axle connecting device (0) comprises a guiding member (61), a connecting piece assembly (62) and a supporting member (63); The connecting piece assembly (62) includes connecting pieces (621), (621,) symmetrically disposed on the left and right sides, and bearings (623) and (623) mounted on the connecting pieces (621), (621), The front end of the guiding member (61) is connected with the rear lower end of the main frame (1), the rear end of the guiding member (61) is connected with the connecting piece assembly (62), and the upper end of the supporting member (63) is connected with the main frame (1), The lower end is connected to the rear of the guide (61) or the tab assembly (62).

2. The tricycle frame according to claim 1, wherein: the connecting tubes (622) and (622) are laterally disposed between the left and right connecting pieces (621) and (621').

The trolley frame according to claim 1 or 2, wherein: the guiding member (61) is a flat fork (611), and the supporting member (63) is a standing fork (631); The front end of the flat fork (611) is connected to the rear lower end of the main frame (1), the upper end of the vertical fork (631) is connected to the rear upper end of the main frame (1), the rear fork (611) rear end and the vertical fork (631) The lower ends are connected to each other or to the left and right connecting pieces (621) and (62), respectively.

4. The tricycle frame according to claim 2, wherein: the guiding member (61) is a flat fork (611), and the supporting member (63) is a left and right shock absorber (632). ), (632); The front end of the flat fork (611) is hinged to the rear lower end of the main frame (1), and the rear end is connected with the left and right connecting pieces (621), (62Γ) or the connecting tube (622). The (62) and the main frame (1) are elastically connected by the left and right shock absorbers (632) and (632).

5. The tricycle frame according to claim 2, wherein: the guiding member (61) is a flat fork (611), and the supporting member (63) is a standing fork (631); (611) A pair of flat fork tabs (612) and (612) are fixed at the rear end, and the flat fork tabs (612) and (612) are semi-elliptical sheets or rectangular sheets, and three openings are provided thereon. The connecting tubes (622), (622) and the rear shaft (9) are fitted and downwardly open, and the flat fork tabs (612) and (612) are attached to the left and right connecting pieces (621), (62). Between the two, the front end of the flat fork (611) and the upper end of the vertical fork (631) are respectively connected to the rear end of the main frame (1), respectively The lower end of the fork (631) is connected to the flat fork tab (612), (612) or the tab assembly (62).

6. The tricycle frame according to claim 2, wherein: the guiding member (61) is a flat fork (611), and the supporting member (63) is a left and right shock absorber (632). ), (632); a pair of flat fork tabs (612), (612) are fixed at the rear end of the flat fork (611), and the flat fork tabs (612) and (612) are semi-elliptical sheets or rectangular sheets. There are three connecting pipes (622) and (622) And the rear axle (9) fits and the downwardly opening the mounting groove, the flat fork tabs (612), (612) are mounted between the left and right connecting pieces (621), (621,), and the connecting tube (622) ), (622) is a detachable connection; the front end of the flat fork (611) is hinged to the rear lower end of the main frame (1), the flat fork tab (612), (612) or the connecting piece assembly (62) The main frame (1) is elastically connected by the left and right shock absorbers (632) and (632).

7. The tricycle frame according to claim 2, wherein: the guiding member (61) is a front end sleeved guide plate (613) or a groove-shaped guide plate (614), The support member (63) is a left and right shock absorber (632), (632); the rear end of the groove guide plate (614) is provided with a circular hole for mounting the connecting pipe (622), (622) and Rear axle (9) clearance fit, with the front end of the casing guide plate (613) or the grooved guide plate (614) hinged to the rear lower end of the main frame (1), the rear end and two connecting pipes (622), (622 ) is fixed and elastically connected to the main frame (1) by left and right shock absorbers (632) and (632).

8. The tricycle frame according to claim 2, wherein: the guiding member (61) comprises a guiding tube (615) and a guiding block (617), and the supporting member (63) is left, Right damper (632), (632); guide block (617) has a circular hole at the rear end for mounting the connecting pipe (622), (622) and the clearance fit with the rear axle (9), the guide pipe ( 615) is fixed on the rear lower end of the main frame (1), and the guiding block (617) is hinged to the guiding tube (615) through a longitudinal rod extending longitudinally at the front end thereof, and the rear end thereof is connected with the connecting tubes (622) and (622) The connecting pipes (622) and (622) are elastically connected to the main frame (1) through the left and right shock absorbers (632) and (632).

9. The tricycle frame according to claim 2, wherein: the guiding member (61) comprises a T-shaped guiding rod (616) and a guiding block (617), and the supporting member (63) is Left and right shock absorbers (632), (632); the guide block (617) has a circular hole at the rear end for mounting the connecting pipe (622), (622) and the clearance fit with the rear axle (9); The T-shaped end of the guide rod (616) is hinged to the rear lower end of the main frame (1), and the other end is hinged to the longitudinally extending circular tube of the front end of the guiding block (617), and the connecting tubes (622), (622) and the guiding block ( 617) Horizontally connected and elastically connected to the main frame (1) by left and right shock absorbers (632), (632).

10. The tricycle frame according to claim 1 or 2, wherein: the left and right connecting pieces (621), (621') are symmetrically mounted with a brake (8), the brake (8) Select one of the ordinary bicycle brake, lift or disc brakes.

11. A portable tricycle comprising a frame, a front fork (14), a handlebar or steering lever (11), a brake (8), a front wheel and a pair of rear wheels, the frame comprising an upper tube (2) a main frame (1) composed of a lower pipe (3), a front pipe (4), and a rear riser (5), and a rear axle connecting device (6) installed at a rear end of the main frame (1), The feature is that: the rear axle connecting device (6) comprises a guiding member (61), a connecting piece assembly (62) and a supporting member (63); the connecting piece assembly (62) includes connecting pieces (621), (621) and symmetrically disposed on the left and right sides, and is mounted on the connecting piece (621), The bearings (623) and (623) on the (621'), the front end of the guiding member (61) is connected to the rear lower end of the main frame (1), and the rear end thereof is connected with the connecting piece assembly (62). The upper end of the support member (63) is connected to the main frame (1), and the lower end is connected to the rear of the guide member (61) or the connecting piece assembly (62).

The tricycle according to claim 11, wherein: the left and right connecting pieces (621) and (62Γ) are laterally provided with connecting pipes (622) and (622), and the outer side is symmetrically mounted. There is a brake (8), and the brake (8) selects one of ordinary bicycle brakes, lift brakes or disc brakes.

13. The tricycle according to claim 12, wherein: said main frame

(1) comprising a riser sleeve (12), the front sleeve (12) being mounted on the front side of the front tube (4), or on the rear side or the upper side of the front tube (4) The front fork riser (15) in the front fork (14) is inserted into the front tube (4), and the handlebar or steering rod (11) is inserted into the riser sleeve (12), the handlebar or the steering lever (Π) and the front fork riser (15) are connected by a steering transmission (7).

14. The tricycle according to claim 13, wherein: said steering transmission member (7) comprises bevel gears (71A), (71B), and bevel gears (71A) and (71B) are respectively fixed to the vehicle. Or the steering rod (11) and the front fork riser (15) and mesh with each other through the intermediate bevel gear (72).

The tricycle according to claim 13, characterized in that: the steering transmission member (7) comprises a bevel gear (73A) and an inner bevel gear (73B), which are respectively fixed to the handlebar or the steering lever (11) and the front fork riser (15) and mesh with each other.

16. A tricycle according to claim 13, wherein: said steering transmission member (7) comprises a universal joint (74), a handlebar or steering rod (11) and a front fork riser (15) ) Connected via a universal coupling (74).

17. A tricycle according to claim 13, wherein: said steering transmission member (7) comprises a pulley (75A;), (75B), a pulley (76) and a flexible loop belt (77). ), the pulleys (75A) and (75B) are respectively fixed to the handlebar or steering rod (11) and the front fork riser (15), and are connected by a flexible loop belt (77), and the pulley ( 76) Between the pulleys (75A) and (75B) and fitted with the flexible loop belt (77).

18. A tricycle according to claim 13, wherein: said steering transmission member (7) comprises a rocker (78A), (78B) and a connecting rod (79), a rocker (78A), (78B) ) Fixed on the handlebar or steering lever (11) and the front fork riser (15), respectively, and hinged to each other through the connecting rod (79).