CN100453393C - A kind of miniature tricycle and its frame - Google Patents

Abstract

The invention relates to a miniature tricycle and its vehicle frame. The vehicle frame comprises a main vehicle frame, a central shaft sleeve installed on the main vehicle frame and a rear axle connecting device. The main frame is V-shaped, H-shaped or U-shaped by connecting the front tube, down tube and rear stand tube, or V-shaped or U-shaped by connecting the front tube and L-shaped frame or U-shaped frame; its rear axle The connecting device is installed at the rear end of the main frame, including guides, connecting piece assemblies and shock absorbers. The vehicle frame of the invention is simple in structure and easy to process, and the miniature tricycle assembled with the vehicle frame is convenient to get on and off, the vehicle body can swing left and right, is not easy to turn over, and runs stably and safely. The invention has a wide range of uses. It can be made into a miniature three-wheeled bicycle driven by manpower, equipped with a battery and a motor, and can also be improved into a miniature three-wheeled electric vehicle; the invention can be used as a general transportation tool or as a leisure vehicle , fitness, amusement, tourism, sports, delivery and other tools, and can also be developed as baby carriages, disabled vehicles, etc.

Description

A kind of miniature tricycle and its frame

【Technical field】

The invention relates to a tricycle and its frame, in particular to a miniature tricycle and its frame.

【Background technique】

Ordinary manpower tricycles and three-wheeled electric vehicles have three wheels, and their driving stability is better than that of bicycles and two-wheeled electric vehicles at low speeds. Therefore, small tricycles and three-wheeled electric vehicles are welcomed by the elderly. Urban and rural can also be used as a means of transportation. However, existing tricycles and tricycle electric vehicles have complex structures, large bodies and heavy bodies, and are still prone to rollover during driving. Today, when urban road resources are in short supply, traffic is increasingly congested, and people's safety awareness is increasing, it is difficult to serve as a tricycle. A common means of transport to use. As the closest comparison document, ZL 200410027852.6 discloses a portable tricycle and its frame. It is inconvenient and cannot meet the requirements of the elderly and children.

【Content of invention】

In view of the above-mentioned defects, one of the purposes of the present invention is to provide a miniature tricycle frame with a simple structure and no crossbeam (upper tube) on the main frame; another purpose of the present invention is to provide a 1. A miniature tricycle whose body can swing left and right.

One of the objectives of the present invention is achieved through the following technical solutions: a miniature tricycle frame, comprising a main frame, a central axis sleeve mounted on the main frame and a rear axle connection device mounted on the rear end of the main frame; The main frame includes a front tube, a down tube and a rear stand tube, the front tube, the down tube and the rear stand tube are connected to each other to form a V shape, an H shape or a U shape with an upward opening, and the down tube and the rear stand tube can be single Tube, also can adopt the double tube of left and right side by side, and described central shaft sleeve tube is installed in lower tube;

Alternatively, the down tube and the rear stand tube can be replaced by an L-shaped frame or a U-shaped frame, that is, the main vehicle frame includes a front tube and an L-shaped frame or a U-shaped frame, and a single tube is used for the L-shaped frame or the U-shaped frame. Or the left and right side-by-side double pipes are bent, and the front end is connected with the front pipe to form a V-shape or U-shape with an upward opening. The central axis sleeve is installed on the L-shaped frame or the U-shaped frame;

The above scheme can be further improved. A rear bracket is added at the rear end of the main frame. The rear bracket is composed of left and right side-by-side double tubes, and its rear end extends backward to form a shelf. Or connect with L-shaped frame or U-shaped frame;

The rear axle connection device includes a guide piece, a connecting piece assembly and left and right shock absorbers; the connecting piece assembly includes connecting pieces arranged symmetrically on the left and right sides, 1-4 connecting pipes and mounted on the connecting piece The two ends of the connecting pipe are connected with the left and right connecting pieces; the front end of the guide is connected with the rear lower end of the main frame, the rear end is connected with the connecting piece assembly, and the upper end of the shock absorber is connected with the main vehicle The frame is connected, and its lower end is connected with the guide piece or the connecting piece assembly.

Another object of the present invention is achieved through the following technical solutions: a miniature tricycle, including a vehicle frame, the vehicle frame includes a main frame, a center shaft sleeve installed on the main frame, and a The rear axle connection device at the end; the main frame includes a front tube, a down tube and a rear stand pipe, and the front tube, the down tube and the rear stand tube are connected to each other to form a V shape, an H shape or a U shape with an upward opening, and the down tube and The rear standpipe can be a single pipe or a double pipe with left and right side by side, and the central axis sleeve is installed in the lower pipe;

Alternatively, the down tube and the rear stand tube can be replaced by an L-shaped frame or a U-shaped frame, that is, the main vehicle frame includes a front tube and an L-shaped frame or a U-shaped frame, and a single tube is used for the L-shaped frame or the U-shaped frame. Or the left and right side-by-side double pipes are bent, and the front end is connected with the front pipe to form a V-shape or U-shape with an upward opening. The central axis sleeve is installed on the L-shaped frame or the U-shaped frame;

The above scheme can be further improved. A rear bracket is added at the rear end of the main frame. The rear bracket is composed of left and right side-by-side double tubes, and its rear end extends backward to form a shelf. Or connect with L-shaped frame or U-shaped frame;

The rear axle connection device includes a guide piece, a connecting piece assembly and left and right shock absorbers; the connecting piece assembly includes connecting pieces arranged symmetrically on the left and right sides, 1-4 connecting pipes and mounted on the connecting piece The two ends of the connecting pipe are connected with the left and right connecting pieces; the front end of the guide is connected with the rear lower end of the main frame, the rear end is connected with the connecting piece assembly, and the upper end of the shock absorber It is connected with the main frame, and its lower end is connected with the guide piece or the connecting piece assembly.

The advantage of miniature tricycle vehicle frame of the present invention is:

1. Simple structure. Compared with the prior art, the main frame of the present invention saves the crossbeam (upper tube), which further simplifies the frame structure, and the rear shock absorber can be installed more conveniently by adding a rear bracket, and can also be used as a rear seat or shelves.

2. Easy to process. The down tube and rear stand tube in the main frame of the present invention can be replaced by an L-shaped frame or a U-shaped frame, and the L-shaped frame or U-shaped frame is directly bent with a single tube or parallel double tubes, eliminating the need for cutting and welding processes , It can also increase the strength of the frame.

The advantage of the miniature tricycle of the present invention assembled with above-mentioned vehicle frame is:

1. It is convenient to get on and off the car. Since the main frame of the present invention does not have a crossbeam (upper tube), the basic shape of the frame is V-shaped, H-shaped or U-shaped with an upward opening, so it is more convenient to get on and off the vehicle, and is especially suitable for the elderly, children and disabled people.

2. The body can swing left and right. The guide and the main frame of the present invention are hinged longitudinally, or the guide itself is made of elastic material, and the front and rear ends can produce a certain "twisted deformation" under the action of force, so that the connecting piece installed at the rear of the guide can always The rear axle can achieve a certain angle of longitudinal deflection, and the rear shock absorber is installed so that the main frame can elastically swing to both sides. When the vehicle turns, it can be avoided by the same side deflection of the rider and the body. Turn over to make the vehicle run more safely.

3. Wide range of uses. The present invention can be made into a miniature three-wheeled bicycle driven by human power, equipped with a battery and a motor, and can also be improved into a miniature three-wheeled electric vehicle; Amusement, tourism, sports, delivery and other tools can also be developed into baby carriages, disabled vehicles, etc.

【Description of drawings】

Figure 1 is a schematic diagram of a V-shaped main frame formed by connecting the front tube, the down tube and the rear stand tube (with the rear axle connection device)

Figure 2 is a schematic diagram of the H-shaped main frame formed by connecting the front tube, the down tube and the rear stand tube

Figure 3 is a schematic diagram of the H-shaped main frame with double down tubes

Figure 4 is a schematic diagram of a U-shaped main frame formed by connecting the front tube, the down tube and the rear stand tube

Figure 5 is a schematic diagram of the V-shaped main frame formed by connecting the L-shaped frame and the front pipe (with rear axle connection device)

Figure 6 is a schematic diagram of the U-shaped main frame formed by connecting the U-shaped frame and the front pipe

Figure 7 is a perspective view of the flat fork + shock absorber type rear axle connection device

Figure 8 is a perspective view of the flat fork joint

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

Figure 10 is a perspective view of the guide plate with casing

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

Figure 12 is a perspective view of the grooved guide plate

Figure 13 is a perspective view of the guide tube + guide block + shock absorber type rear axle connection device

Figure 14 is a perspective view of a guide block with a round bar at the front

Figure 15 is a perspective view of the T-shaped guide rod + guide block + shock absorber type rear axle connection device

Figure 16 is a perspective view of the hinged connection of the T-shaped guide rod and the guide block

Figure 17 is a perspective view of the T-shaped guide rod + guide frame + shock absorber type rear axle connection device

Figure 18 is a perspective view of the hinged connection of the T-shaped guide rod and the guide frame

Figure 19 is a perspective view of the connecting piece assembly

Figure 20 is a perspective view of a brake (brake box with a brake ring) arranged symmetrically on the left and right

Figure 21 is a perspective view of the brake (brake box with brake ring) installed on the connecting piece assembly

Fig. 22 is the perspective view of the miniature three-wheeled electric vehicle of the preferred embodiment of the present invention

In the picture:

Main frame 1 front tube 2 down tube 3 rear tube 4

Rear bracket 5 Rear axle connecting device 6 Reinforcement frame 7 Brake 8

Rear axle 9 Central axle bushing 10 Handlebar 11 Battery 12

Motor 13 Pedal part 18 L-shaped frame 31 U-shaped frame 32

Guide piece 61 Connecting piece assembly 62 Shock absorber 63 Flat fork 611

Flat fork joint 612 Guide plate with casing 613 Groove guide plate 614 Guide tube 615

T-shaped guide bar 616 guide block 617 guide frame 618 connecting piece 621, 621'

Connecting pipe 622 Bearing 623 Brake box 81, 81' Brake ring 82, 82'

crankshaft 83, 83' crankshaft connecting rod 84 middle joint 85

【Detailed ways】

Preferred embodiment: the present embodiment is a miniature three-wheeled electric vehicle. As shown in FIGS. 15 and 22 , the frame of the miniature three-wheeled electric vehicle includes a main frame 1 , a center shaft sleeve 10 and a rear axle connecting device 6 . Wherein the main vehicle frame 1 is made up of front tube 2, U-shaped frame 32, rear support 5, and U-shaped frame 32 is bent with left and right side by side, and the double tubes of front and rear ends are upturned upwards, and is formed with 2 tubes between the double tubes. - 3 horizontal tubes are reinforced, the front ends of which are connected together with the front tube 2 and reinforced by the reinforcement frame 7; the rear support 5 is double tubes arranged in parallel on the left and right, and the double tubes are reinforced with 2-3 horizontal tubes, Its rear end extends horizontally backward to form a shelf, and its front end extends forward and downward to connect with the outside of the U-shaped frame 32. The rear bracket 5 can be directly bent by a single tube; the central axis sleeve 10 is mounted on the U-shaped frame 32 bottom.

As shown in FIG. 15 , the rear axle connection device 6 adopts a T-shaped guide rod+guide block+shock absorber structure, and the device includes a guide piece 61 , a connecting piece assembly 62 and a shock absorber 63 . The guide 61 is made up of a T-shaped guide rod 616 and a guide block 617. The rear end of the guide block 617 is horizontally provided with 3 circular holes, wherein the diameter of the middle circular hole is larger than that of the rear axle 9, so as to fit with the clearance of the rear axle 9, so that the rear axle 9 It can run freely in it, and the remaining two round holes are used to install two connecting pipes 622, 622; the T-shaped end of the T-shaped guide rod 616 is hinged with the rear lower end of the U-shaped frame 32, and the other end extends longitudinally from the front end of the guide block 617 The circular pipe hinge (Figure 16); as shown in Figure 19, the connecting piece assembly 62 includes left and right connecting piece 621,621 ', two connecting pipes 622,622 and bearings 623,623, left and right connecting piece 621 The distance between , 621' is 300mm, the bearings 623, 623 are installed in the middle of the connecting piece 621, 621', and the two connecting pipes 622, 622 pass through the round hole at the rear end of the guide block 617 and are fixedly connected with the guide block 617, and are connected with the left 1. The right connecting piece 621, 621' is connected, and the distance between the inner sides of the two connecting pipes 622, 622 is 80 mm, so that the flywheel runs in it without interference; the shock absorber 63 is a pair and is arranged symmetrically on the left and right , the two connecting pipes 622, 622 are elastically connected to the rear support 5 through the shock absorbers 63, 63. In order to make the two connecting pipes bear the force evenly, a shock absorber frame is installed between the lower end of the shock absorber and the connecting pipes to reduce There is a round hole in the middle of the shock absorber frame, and its diameter is larger than that of the rear axle 9, so that the rear axle 9 can run freely in it. At the same time, a gap of 40mm should be reserved between the left and right shock absorber frames and the guide block 617 for easy installation. Human-driven flywheel and motor flywheel.

As shown in Figure 22, load onto the front fork in the front pipe 2 of above-mentioned vehicle frame, load onto the front wheel of handlebar 11 and 20 " respectively on the upper and lower ends of the front fork, on the bearing 623 of connecting piece assembly 62, Install the rear axle 9 that is 500mm in length in 623, and the rear axle 9 passes through the round hole preset in the guide block 617 and the left and right shock absorber frames, and one end is fixedly connected with a rear wheel, and the other end is connected with the other through the bearing. The rear wheel is articulated to form differential rotation, and the wheel diameter of the two rear wheels is 20 "; the central shaft is installed in the central shaft sleeve 10, and the pedal part 18 with a 48-tooth chain disc is installed on the central shaft. Install a 16-tooth flywheel on the rear axle 9 corresponding to the chain plate, and install a chain between the chain plate and the flywheel. In order to prevent the flywheel from falling out of the chain, a guide sprocket can be installed at the front end of the flywheel; as shown in Figure 20 and Figure 21 , the brake 8 of the present embodiment adopts common bicycle brakes, and the brakes are a pair and arranged symmetrically, and the brake boxes 81 with brake rings 82, 82 are mounted on the outsides of the left and right connecting pieces 621, 621' during installation. , 81, load onto the crankshaft connecting rod 84 between the crankshafts 83 and 83 on the two brake rings, load onto the middle joint 85 of the brake line at the 84 middle parts of the crankshaft connecting rod, connect the inner sides of the axle sleeves of the two rear wheels with the Brake box 81, 81 corresponding parts are loaded onto brake disc (in other embodiments, also can adopt expansion brake or disc brake, and its installation method is the same as this example), load onto handbrake handle on handlebar 11, on brake handle Load onto brake line between joint 85 in the brake line, load onto common brake parts at front wheel, load onto saddle on U-shaped frame 32 rear upper ends, load onto motor and the lower side respectively at U-shaped frame 32 bottoms The battery is installed on the outside of the front and rear wheels with fenders, and a miniature three-wheeled electric vehicle has been assembled.

The external dimensions of the miniature three-wheeled electric vehicle assembled in this embodiment are equivalent to those of the existing electric bicycle, and the length, width and height are about 1680mm×500mm×1060mm. Therefore, as long as the electric bicycle can be on the road, the present invention has reason to be on the road. Because the present embodiment adopts "two-stage hinged joints" (the T-shaped end of the T-shaped guide bar 616 is horizontally hinged with the rear lower end of the U-shaped frame 32, and its rear end is vertically hinged with the guide block 617), and a shock absorber is installed, so When one side of the rear wheel touches the uneven road, it can greatly reduce the side-to-side swing and up-and-down bump of the vehicle body. When the vehicle turns, the rider can obtain centripetal force by deflecting the body to the same side and tilting the body at a certain angle, just like riding a bicycle. so that the vehicle will not turn over; the dual rear wheel brake device installed in the present invention is a brake synchronization device, and the two rear wheels are evenly stressed during braking, which can prevent the vehicle from running off and turning over to a certain extent. The components form a reliable brake system together, thereby greatly improving the safety of driving; the vehicle frame of this embodiment adopts a V-shaped, H-shaped or U-shaped structure with an upward opening, so it is very convenient for riders to get on and off the car ; The present invention except rear axle connecting device 6, other parts all can adopt existing electric bicycle standard parts and components. Present embodiment both can adopt electric drive, also can adopt manpower drive, when adopting manpower drive, the cooperation of its chain plate, flywheel and rear wheel, make it still can obtain about 15 kilometers per hour speed under the normal pedaling frequency. Therefore, the present invention has the advantages of simple structure, small size and light weight, stable and safe driving, not easy to overturn, comfortable ride, can be promoted in urban and rural areas as a general means of transportation, and can also be widely used for leisure, fitness, entertainment, tourism, sports, transportation, etc. Cargo and other tools, or made into children's carriages, vehicles for the disabled to use.

Compared with the reference document, the improvement of the present invention lies in the main frame 1 . The basic shape of the main frame 1 is a V-shape, H-shape or U-shape with an upward opening, and there are various options for its composition and connection method:

Option 1: As shown in Figure 1, the main frame 1 includes the front tube 2, the down tube 3, the rear stand tube 4 and the center shaft sleeve 10, and the two ends of the down tube 3 are connected with the lower ends of the front tube 2 and the rear stand tube 4 respectively. Connected, the center shaft casing 10 is installed in the lower tube 3; the appearance of the main frame 1 is V-shaped. In order to increase the strength of the main vehicle frame 1, a reinforcing frame 7 can be added at the junction of the down tube 3 and the front tube 2 or the rear stand tube 4.

Option 2: As shown in Figure 2, the main frame 1 includes a front tube 2, a down tube 3, a rear stand tube 4 and a center shaft sleeve 10, and the two ends of the down tube 3 are connected to the middle of the front tube 2 and the rear stand tube 4 respectively. The middle and lower parts of the main frame are connected, and the central axis sleeve 10 is installed in the lower tube 3; the appearance of the main frame 1 is H-shaped. In order to increase the strength of the main frame 1, a reinforcing frame 7 can be added at the junction of the down tube 3 and the front tube 2.

Fig. 3 is an improved scheme of scheme 1 or scheme 2. The difference is that the downpipe 3 is two and parallel up and down, and is respectively connected with the front pipe 2 or the rear standpipe 4, and one more downpipe 3 is provided. The purpose is to increase the strength of the main frame 1 .

Option 3: As shown in Figure 4, the main frame 1 includes a front tube 2, a down tube 3, a rear stand tube 4 and a center shaft sleeve 10. The rear end is connected with the rear riser 4, and the appearance of the main frame 1 is U-shaped.

Scheme 4: As shown in Figure 5 and Figure 6, in order to save welding process and increase the strength of the frame, the down tube 3 and rear riser 4 in the schemes of Figures 1, 2, and 4 can be replaced by L-shaped or U-shaped frames. Shaped frame or U-shaped frame directly bends with single pipe, and its front end joins with front pipe 2, and main vehicle frame 1 is V-shaped or U-shaped. For increasing the strength, a reinforcing frame 7 can be added at the junction of the L-shaped frame or the U-shaped frame and the front pipe 2, and the central axis sleeve 10 is installed in the middle part of the L-shaped frame or the U-shaped frame.

In the above scheme, the lower tube 3 and the rear stand tube 4, the L-shaped frame or the U-shaped frame can be a single tube, or a double tube with left and right side by side and connected by a horizontal tube in the middle, and its cross section can be a circle. Tube, also can be square tube, ellipse tube or the tubular thing of other shapes; Simultaneously, for the convenience of installing rear axle connecting device 6, main vehicle frame 1 can also be provided with rear support 5. The rear bracket 5 is composed of left and right side-by-side double pipes, and its front end extends forward and downward to connect with the rear stand pipe 4 and the down pipe 3 (Fig. 2-3), or connects with the L-shaped frame or U-shaped frame (Fig. 5-6), it can also extend forward to join with the rear standpipe 4 and the front pipe 2 (Fig. 4), and its rear end extends horizontally backward and is connected to each other; the rear bracket 5 can also be directly bent by a single pipe become. A reinforcing frame 7 can be installed between the rear support 5 and the rear standpipe 4 to make its structure more firm. Setting the rear bracket 5 can not only install the rear shock absorber 63 easily, but also can be used as a rear seat or a shelf, which can carry people or loads, and can also increase the strength of the main frame, which can serve multiple purposes. Certainly, in some children's tricycles, for the sake of lightness, the rear bracket 5 can be saved, and the rear axle connecting device 6 can be directly installed on the rear standpipe 4 (as shown in Figure 1); In the tricycle, the rear support 5 also need not extend backwards into a shelf, but only as a mounting frame for the rear shock absorber 63 (as shown in Figure 6).

Compared with the existing tricycle, the improvement of the present invention is that the main frame 1 is installed with the rear axle 9 through the rear axle connecting device 6 . The rear axle connection device 6 includes a guide piece 61, a connecting piece assembly 62 and a shock absorber 63, each of which has different functions, and its composition also has different methods:

1. Guide piece: The function of the guide piece 61 is mainly to guide the rear axle 9, that is, to position the rear axle. Regardless of whether its front end and the main frame 1 are hinged horizontally or vertically, the rear axle 9 will not be left. , The right axis swings, so that the rolling direction of the rear wheel is always consistent with the forward direction of the vehicle.

In order to make the vehicle more stable and safe, the vehicle body must be able to achieve a certain longitudinal deflection on the same side when the vehicle turns to avoid rollover. For this reason, the present invention adopts two technical solutions: one is to adopt longitudinal hinge between the guide piece and the main frame; Hinged, or the guide itself is made of elastic material, and its front and rear ends can produce a certain "twist deformation" under the action of force, so that the connecting piece assembly and the rear axle installed at the rear end of the guide can still be fixed. To achieve a certain degree of longitudinal deflection; the second is to install the rear shock absorber, so that the deflection of the main frame to both sides is elastic deflection, which can only be realized under the action of force.

2. Connecting piece assembly: The connecting piece assembly 62 has two functions: one is to act as an intermediary connection between the guide 61 or the shock absorber 63 and the rear axle 9, and through the bearings on the connecting piece 621, 621' 623,623 install rear axle 9; As shown in Figure 19, the connecting piece assembly 62 includes left and right connecting pieces 621, 621', connecting pipes 622, 622 (there are generally two connecting pipes 622, and 1-4 pieces can be selected as required) and bearings 623, 623, connecting pieces 621, 621' are disc-shaped or oval-shaped, bearings 623, 623 are installed in the middle of connecting pieces 621, 621', and the two ends of connecting pipes 622, 622 are connected with left and right connecting pieces 621, 621 'Fixed connection or screw connection, the connecting pieces 621, 621' are provided with a number of screw holes for the installation of the brake 8 and the fender. The spacing of left and right connecting piece 621,621 ' is selected between 100-600mm, is generally 200-500mm, and this spacing is after loading onto rear axle and two trailing wheels, and the car width is about 360-700mm. If more than 2 connecting pipes are installed, there should be a gap of 90±30mm (generally 70-90mm) between the connecting pipes, so that the operation of the flywheel will not be interfered after the flywheel is installed.

3, shock absorber: the effect of shock absorber 63 is " suspension " and realizes the left and right elastic deflection of vehicle body. On the one hand, the load at the rear of the vehicle body is elastically transmitted to the connecting piece assembly 62, the rear axle 9 to the rear wheels through the shock absorber 63, so that the vehicle can achieve shock absorption; on the other hand, the shock absorber cooperates with the guide to make the main The vehicle frame 1 can be elastically deflected to the left and right sides, so that rollover can be avoided when the vehicle turns or one side of the rear wheel hits an obstacle. Shock absorber 63 is a pair and is left and right symmetrically arranged, and in order to adapt to its change in relative position in motion, its upper and lower ends must be installed joint bearing. A certain gap (generally 25-40mm) will be left on the same side of the shock absorber 63, 63 and the guide 61, so that the flywheel is installed and its operation is not interfered.

Except described in the preferred embodiment, the rear axle connecting device 6 also has the following schemes to choose from:

1. Flat fork + shock absorber. As shown in FIG. 7 , the guide of this solution includes a flat fork 611 , flat fork joints 612 , 612 fixed on the rear end of the flat fork 611 , and its connecting piece assembly 62 has two connecting pipes 622 , 622 . As shown in Figure 8, the semi-elliptical or rectangular sheet-shaped flat fork joints 612, 612 are fixed on the rear end of the flat fork 611, and there are three pieces on it to cooperate with the two connecting pipes 622, 622 and the rear axle 9. And the assembly groove opening downwards, wherein the assembly groove aperture in the middle is larger than the rear axle 9, so that the rear axle 9 can run freely therein, and the assembly grooves on both sides are used to install two connecting pipes 622, 622, flat fork joints The distance between the pieces 612 and 612 is selected between 80-300 mm, and they are installed between the left and right connecting pieces 621 and 621 ′, and screw holes are provided on them to facilitate the detachable connection with the connecting piece assembly 62 .

The front end of the flat fork 611 is hinged to the rear end of the down tube 3, the flat fork joints 612, 612 and the connecting pipes 622, 622 are detachably connected, the flat fork joints 612, 612 or the connecting piece assembly 62 are connected to the main frame 1 (Rear standpipe 4 or rear bracket 5) realize elastic connection by left and right shock absorbers 63,63. The flat fork 611 is made of elastic steel pipe or spring steel. When the front end is transversely hinged with the main frame 1, the rear end can still produce a certain "twisted deformation" under the action of force to match the body shape. Left and right deflection.

2. With casing guide plate + shock absorber type. As shown in FIG. 9 and FIG. 10 , the guide 61 of this solution is a guide plate 613 with a sleeve at the front end, and its connecting piece assembly 62 has two connecting pipes 622 , 622 . The front end of the guide plate 613 is hinged with the main frame 1 through the sleeve pipe, and the rear end is connected with two connecting pipes 622, 622, and is connected with the main frame 1 (rear standpipe 4 or rear standpipe 4 or rear) through left and right shock absorbers 63, 63 The bracket 5) realizes elastic connection.

3. Groove guide plate + shock absorber type. As shown in Fig. 11 and Fig. 12, the guide 61 of this solution is a groove-shaped guide plate 614, and its connecting piece assembly 62 has two connecting pipes 622, 622. The rear end of the grooved guide plate 614 is horizontally provided with 3 circular holes, the middle circular hole is in clearance fit with the rear axle 9, and the other two circular holes are used for installing connecting pipes 622, 622, and the front end of the grooved guide plate 614 is connected to the main frame. 1 is hinged, and its rear end is transversely fixedly connected with connecting pipes 622, 622 through the above-mentioned round holes, and realizes elastic connection with the main frame 1 (rear standpipe 4 or rear bracket 5) by left and right shock absorbers 63, 63.

The sleeve guide plate 613 or the groove-shaped guide plate 614 are made of thin steel plate or other elastic materials, which can produce a certain “twist deformation” under the action of force, so as to cooperate with the vehicle body to realize left and right deflection.

4. Guide tube + guide block + shock absorber type. As shown in FIG. 13 and FIG. 14 , the guide piece 61 of this solution includes a guide tube 615 and a guide block 617 , and its connecting piece assembly 62 has two connecting tubes 622 , 622 . A round bar protrudes longitudinally from the front end of the guide block 617, and three round holes are arranged horizontally at the rear end, the middle round hole is in clearance fit with the rear axle 9, and the remaining two round holes are used for installing connecting pipes 622, 622 (Fig. 14) The guide tube 615 is fixed on the rear lower end of the main frame 1, the round bar at the front end of the guide block 617 is hinged with the guide tube 615, and its rear end is connected horizontally with two connecting pipes 622, 622, and the connecting pipes 622, 622 pass through the left and right The shock absorbers 63, 63 are elastically connected with the main frame 1 (rear stand pipe 4 or rear bracket 5).

5. T-shaped guide rod + guide frame + shock absorber. As shown in FIG. 17 and FIG. 18 , the guide piece 61 of this solution includes a T-shaped guide rod 616 and a guide frame 618 , and its connecting piece assembly 62 has two connecting pipes 622 , 622 . The guide frame 618 is a frame structure, and its front portion is longitudinally provided with two circular holes. The T-shaped end of the T-shaped guide rod 616 is horizontally hinged with the rear lower end of the main frame 1, and the other end is connected to the guide frame 618 through these two circular holes. Vertically articulated, three round holes are horizontally arranged on both sides of the rear end of the guide frame 618, wherein the middle round hole is in clearance fit with the rear axle 9 (Fig. 18), and the remaining two round holes are used for installing connecting pipes 622, 622; Pipes 622, 622 are elastically connected to main vehicle frame 1 (rear stand pipe 4 or rear bracket 5) through left and right shock absorbers 63, 63. Guide frame 618 is made of thin steel plate, or is made of plastics.

Claims (8)

1. A miniature tricycle frame, comprising a main frame (1), a central shaft sleeve (10) mounted on the main frame (1) and a rear axle connecting device (6) mounted on the rear end of the main frame (1) ), characterized in that: the main frame (1) includes a front pipe (2) and an L-shaped frame (31) or a U-shaped frame (32), and the L-shaped frame (31) or the U-shaped frame (32) is used The left and right side-by-side double pipes are bent, and the double pipes are connected by 2-3 horizontal pipes, and their front ends are connected with the front pipe (2) to form a V shape or U shape with an upward opening. The shaft sleeve (10) is mounted on an L-shaped frame (31) or a U-shaped frame (32); The main frame (1) also includes a rear bracket (5). The rear bracket (5) is composed of left and right double tubes, and the double tubes are reinforced with 2-3 horizontal tubes. Horizontally extending and closing to form a shelf, the front end of which is connected to the L-shaped frame (31) or the U-shaped frame (32); The rear axle connection device (6) includes a guide piece (61), a connecting piece assembly (62) and left and right shock absorbers (63, 63); the described connecting piece assembly (62) includes two left and right The connecting pieces (621, 621 '), 1-4 connecting pipes (622) and the bearings (623, 623) mounted on the connecting pieces (621, 621 ') arranged symmetrically on the side, the two connecting pipes (622) The end is connected with the left and right connecting pieces (621, 621'); the front end of the guide (61) is connected with the rear lower end of the main frame (1), and its rear end is connected with the connecting piece assembly (62) , the upper end of the shock absorber (63, 63) joins with the main frame (1), and its lower end joins with the guide piece (61) or the link assembly (62). 2. The miniature tricycle frame according to claim 1, characterized in that there are two connecting pipes (622), the guide (61) is a flat fork (611), and the flat fork (611) A pair of flat fork joints (612, 612) are installed at the rear end, and the flat fork joints (612, 612) are semi-elliptical or rectangular, on which there are 3 assembly grooves with downward openings, which are respectively connected with the The above connecting pipes (622, 622) and the rear axle (9) cooperate, and the flat fork joints (612, 612) are installed between the left and right connecting pieces (621, 621 '), and are connected with the connecting pipes (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), and the flat fork joints (612, 612) or connecting piece assembly (62) are connected to the main frame (1) Elastic connection between left and right shock absorbers (63,63). 3. The miniature tricycle frame according to claim 1, characterized in that there are two connecting pipes (622), and the guide (61) is a guide plate (613) with a sleeve, with a sleeve The front end of the pipe guide plate (613) is hinged with the rear lower end of the main frame (1), and its rear end is connected with two connecting pipes (622, 622), and is connected to the main vehicle through the left and right shock absorbers (63, 63). Frame (1) is elastically connected. 4. The miniature tricycle frame according to claim 1, characterized in that there are two connecting pipes (622), and the guide (61) is a groove-shaped guide plate (614), and the groove-shaped guide The rear end of the plate (614) is horizontally provided with 3 round holes, the middle round hole is in clearance fit with the rear axle 9, and the other two round holes are used for installing the connecting pipes (622, 622), and the front end of the grooved guide plate (614) is in contact with the rear axle 9. The rear lower end of the main vehicle frame (1) is hinged, and its rear end is elastically connected with the main vehicle frame (1) through left and right shock absorbers (63, 63). 5. The miniature tricycle frame according to claim 1, characterized in that there are two connecting pipes (622), and the guide piece (61) includes a guide pipe (615) and a guide block (617) , the guide tube (615) is fixed on the rear lower end of the main frame (1), a round bar protrudes longitudinally from the front end of the guide block (617) and is hinged with the guide tube (615), and the rear end of the guide block (617) is horizontally provided with 3 Circular hole, the circular hole in the middle of it is clearance fit with the rear axle (9), and the other two circular holes are used to install connecting pipes (622, 622), and the connecting pipes (622, 622) pass through the left and right shock absorbers (63, 622). 63) elastically connected with the main frame (1). 6. The miniature tricycle frame according to claim 1, characterized in that there are two connecting pipes (622), and the guide (61) includes a T-shaped guide rod (616) and a guide block ( 617), the rear end of the guide block (617) is horizontally provided with 3 round holes, the middle round hole is clearance fit with the rear axle (9), and the remaining two round holes are used to install the connecting pipes (622, 622), T-shaped The T-shaped end of the guide rod (616) is hinged with the rear lower end of the main frame (1), and the other end is hinged with the round pipe protruding longitudinally from the front end of the guide block (617). The connecting pipes (622, 622) pass through the left and right shock absorbers (63,63) are elastically connected with the main vehicle frame (1). 7. A miniature tricycle, comprising a vehicle frame, said vehicle frame comprising a main frame (1), a center shaft sleeve (10) mounted on the main frame (1) and a The rear axle connection device (6) at the end is characterized in that: the main frame (1) includes a front tube (2) and an L-shaped frame (31) or a U-shaped frame (32), an L-shaped frame (31) or The U-shaped frame (32) is bent with left and right double pipes, and the double pipes are connected by 2-3 horizontal pipes, and its front end is connected with the front pipe (2) to form an upward V-shaped opening or U-shaped, the central shaft sleeve (10) is mounted on an L-shaped frame (31) or a U-shaped frame (32); The main frame (1) also includes a rear bracket (5). The rear bracket (5) is composed of left and right double tubes, and the double tubes are reinforced with 2-3 horizontal tubes. Horizontally extending and closing to form a shelf, the front end of which is connected to the L-shaped frame (31) or the U-shaped frame (32); The rear axle connection device (6) includes a guide piece (61), a connecting piece assembly (62) and left and right shock absorbers (63, 63); the described connecting piece assembly (62) includes two left and right The connecting pieces (621, 621 '), 1-4 connecting pipes (622) and the bearings (623, 623) mounted on the connecting pieces (621, 621 ') arranged symmetrically on the side, the two connecting pipes (622) The end is connected with the left and right connecting pieces (621, 621'); the front end of the guide (61) is connected with the rear lower end of the main frame (1), and its rear end is connected with the connecting piece assembly (62) , the upper end of the shock absorber (63, 63) joins with the main frame (1), and its lower end joins with the guide piece (61) or the link assembly (62). 8. The miniature tricycle according to claim 7, characterized in that: brakes (8) are symmetrically installed on the outer sides of the left and right connecting pieces (621, 621'), and the brakes (8) are Choose one of bicycle brakes, expansion brakes or disc brakes.

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