When it comes to fitness, many people think of running, swimming, jumping, gym, or my personal favorite fast weight loss exercise - dynamic bicycle. So, what do you think of projects that can not only take the walk, but also keep fit? No doubt, it must be cycling.

However, if you are still riding a bike, you will be out!

Today, I'm going to bring you a new model that can not only keep fit but also take care of walking - Leopard Bike. The biggest difference between this sports car and a bicycle is that it has no seats and is a tricycle.

Assembly and installation process:

The leopard riding sports car is assembled from several parts, and users need to assemble it by themselves. In view of the need for someone to take photos during the assembly process, someone else will install it for me, and I will take photos. The installation process is not complicated. One person can complete it, and it takes more than ten minutes. Full video record of assembly is attached. The manufacturer has assembled the sports car into several large parts when it leaves the factory. We just need to connect them to get on the road. The tools provided by the manufacturer are complete enough for assembly.

Step 1: The main body of Leopard Bijian sports car is made of aviation grade aluminum alloy, with front wheel. The rear wheels of the car body are two small wheels. Only three bolts are needed to connect the body body to the two rear wheels. First, tie up one end of the body body with three screw holes with plastic ties as a fixation to facilitate the installation of bolts. The manufacturer is very considerate in this regard.

In order to facilitate the fastening of bolts, the manufacturer is equipped with two hexagonal wrenches.

Step 2: Install rosewood handlebars. The redwood is forked, and the end connecting the front of the car and the body is broken off and stuck at his knee. Then remove the screws at both ends of the longest stud bolt in the accessory, and install the main body in the middle into the opening of the wooden handlebar to remove the handlebar from the knee. Put the wooden handlebar inside the body, align the opening, tighten the screws at both ends of the stud bolt, and then the large parts of the body are assembled.

Step 3: One of the highlights of a leopard riding a healthy sports car is that it can be folded. At the folding position of handlebar and body, the manufacturer is equipped with two quick mounting bolts for fixing. Unscrew the nuts of the quick installation bolts, put the screws through the holes in the body body and the wooden headstock, and fasten them to the proper position, so that the two parts can be connected as one. Since the fixed position can be adjusted, users can freely adjust the handlebar position according to their own height and body forward tilt angle.

Step 4: Install the brake line. A brake line is led out from the wooden handlebar. It only needs to pass through the preset wiring channel of the body body until it reaches the rear wheel. First pass the brake line through the brake line hole at the left rear wheel, then through the hole in the middle, and finally connect it to the brake fixing bolt at the right rear wheel. Adjust the appropriate brake position, and then install the pedals on the left and right sides, and the car can be on the road.

After reading the assembly, we may have many questions. About its unique body design, about its riding principle, and so on. It can be summarized as several advantages and disadvantages.  

Point 1:

The Leopard Bijian sports car is composed of a North American redwood front frame and an aviation grade aluminum body. The front frame of Leopard Bijian sports car adopts streamlined design to avoid rigidity. The body is made of high-strength aluminum, and the innovative S-shaped stretching technology is stable and not easy to deform. However, since the front frame is made of redwood, it cannot be exposed to rain or washed with water.

Point 2:

The steering system of Leopard Bijian sports car relies on the adaptive spring between the rear wheel and the body. A leopard riding a sports car is different from an ordinary bicycle because its front handlebar is fixed and cannot rotate. Therefore, when a leopard rides a sports car to turn, the handlebars, front wheels and body are in the same plane, while the direction of the rear wheels remains the same. Adaptive springs are used to change the turning direction of the body.

According to the user's balance function, Drive the crank to rotate by standing and riding ， Control the direction of the sports car, so as to exercise the shoulder muscles. The user controls the balance direction through both hands to exercise the biceps brachii. While controlling the direction of balance between the person and the body, it can exercise the waist and groin muscles. The user treads on both feet of the foot pedal, and can exercise the muscle group of the lower leg in the process of exerting force.

Because the user keeps balance by twisting his body when riding a leopard and a sports car, there is no seat for a leopard to ride a sports car. I once wanted to install a seat on the body, but after seeing the real thing, I found that if the seat was installed, the whole body could not swing and the balance of the body could not be controlled. Therefore, this is also the unique feature of leopard riding a sports car. However, this also challenges the strength of the user's waist, abdomen and legs. The leopard riding sports car cannot be used by the public.

Point 3:

Leopard riding a healthy sports car uses front drive power. This is also different from many bicycles. Many years ago, the bicycle was changed from front drive power to rear drive power. Because the bicycle rotates by the handlebar when turning, and the chain is attached to the rear wheel, it is easy to be in the same plane with the body, easier to maintain, and not easy to damage. However, the handlebars of the Leopard Bijian sports car can't rotate. Its turning depends on the adaptive spring of the rear wheel. The handlebars of the Leopard Bijian sports car are kept in the same plane with the body. Therefore, Leopard ride a healthy sports car with front drive power.

Point 4:

Leopard riding sports car can be folded for easy storage and carrying. The whole vehicle weighs only 11kg, The part between the front of the car and the body is equipped with a crossbar handle, which is very convenient for lifting and towing a sports car. After folding, the length of the car body is one meter, which can be put in the rear compartment of the private car. On weekends, you can drive a sports car to a beautiful place, where you can enjoy the coastal scenery and keep fit and lose weight.

Point 5:

A leopard riding a sports car is a tricycle, which is easy to get on and off. As the saying goes: three points of stability. Therefore, a three wheeled car is more stable when getting on and off than a two wheeled car. However, the size difference between the front and rear wheels is too large. When the wheels roll over, the rear wheels of Tencent will rise, increasing the danger. If the rear wheel can be increased in size or focus to effectively stabilize the body, it will make riding more stable.

Point 6:

The details were quite refined. The official price of Leopard Bike is 899 yuan. The car uses aluminum alloy bearing pedals, and the handlebars are made of stainless steel tubes, with hand guard sponge sleeves. The gears of the sports car are of fine workmanship, with clear wheel lines and transverse patterns. However, the transverse pattern is continuous in the transverse direction and disconnected in the longitudinal direction. Therefore, the transverse stiffness is large and the longitudinal stiffness is small. Therefore, when a sports car turns at high speed, it is easy to roll over.

Experience of riding a healthy sports car:

Leopard Bike is a special kind of scooter, and its riding skills and skills are very important. However, we can also play with this car in principle.

When the user rides this car, his body swings with the swing of the car, and his body is in the same plane as the front wheels. The front handlebar supports the user and points to the head along the body direction. We call it F1. The user's gravity is vertically downward. We call it F2, and the two forces are combined into a resultant force pointing horizontally to the leaning side of the body - centripetal force. We call it F. As shown in the figure, the angle between the support force F1 and the vertical downward direction is α。 The direction of the rear wheel of the sports car remains unchanged, and the front wheel and the rider are pushed to turn under the action of the centripetal force F.          

However, if the car offset angle is too large, it will cause The α angle is too large, Thus, the centripetal force F is increased, and the user will slip sideways. According to several cycling tests, the cyclist's center of gravity shifts and sideslips, and the rear wheels of the car are too light, which will cause the rear wheels to tilt up and accelerate the car to roll over.         

So, how should we control our own balance? How to control the car without rollover?

As can be seen from the figure below, the horizontal force is centrifugal force F1, and the vertical force is gravity F2. The resultant force F of the two forces along the vehicle direction. The included angle between gravity and resultant force is α. Then, how to make the included angle α reaches a suitable value so that the car can keep balance? Let's take a look.

The rider's gravity is certain. If the user's centrifugal force is too large, it will increase α angle, causing the resultant force to deviate from the direction of the bicycle. That is, if the offset angle of the resultant force α is larger than the offset angle of the car itself, the center of gravity of the person will exceed the bearing range of the car, and the rider will roll over.

Then, if the centrifugal force is reduced and the rider's body offset angle is reduced, then, The α angle will decrease accordingly, so that the deviation angle of resultant force F is smaller than that of the car. Then, the center of gravity of the cyclist is within the range of the vehicle, and the cyclist can stably control the balance of the vehicle.

However, if If the α angle is too small, the car cannot turn and can only travel in a straight line. After many attempts, the sports car can not complete the goal of riding on the 400m runway, which is more suitable for the wooden plank road at the seaside or the spacious avenue.

It's a lot of wordiness. I don't know if I have explained it clearly. However, since there are problems, we can improve them.

Scheme I: Increase the rear wheel mass.

The size difference between the front and rear wheels is too big. The rear wheels are far from enough in terms of shape and weight. When a cyclist rolls over, the rear wheel turns up first before the rider falls down, causing the vehicle to roll over and the user to fall down. If the rear wheel mass is increased, it will increase the traction force and friction of the sports car.

Scheme II ： Increase the handle length.

The distance between the hands is too short, so it is difficult to control the direction. Increase the length of the handle, that is, widen the force bearing points of both hands. For beginners, it can effectively control the direction.

Scheme III: Exercise more to increase the strength of waist, abdomen and lower legs.

In fact, Scheme 3 is the most feasible and simplest method. Riders should exercise more to increase the strength of the waist, abdomen and lower legs, so that they can learn and adapt to the riding style of leopard riding a sports bike more quickly, and increase the ways of walking and fitness.