JPS624681A - Secondary manufacture of monocoque body car - Google Patents

Abstract

PURPOSE:To increase rigidity by utilizing each vacant part, etc. of a monocoque car preponderantly. CONSTITUTION:A chassis is constituted from a sandwhich reinforcement consisting of thick pipes and several kinds of thin iron plates for dispersing stress in mixed form.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Fields This invention makes it possible to manufacture all types of vehicles in fields that have hitherto been impossible through line production by automobile manufacturers. In addition to the open 2-door monocot truck, we have also introduced an ultra-long limousine, which is unprecedented in a single domestically produced vehicle, and a multi-axle 1 (
production, and the opening of the 4-door monocot truck Higashi, which is unprecedented in the world of construction.

(However, there are some examples of 4-door frame cars overseas, but the difficulty level cannot be compared with the monocoque East, and there are many customizers who have attempted the same work on monocoque cars.) However, because basic structural analysis, stress calculation, stress measurement, etc. were not performed,
Although the shape has been created, it does not seem to last for several months. ) Users' wishes for each of the above-mentioned vehicles are increasing, but since it is impossible for manufacturers to fulfill them (in the sense of all car models, this means that if they completely ignore whether it will sell or not and go into production at high cost) However, the reality is that each user pays a large sum of money, several thousand blades, and relies on foreign cars.

The secondary production of various vehicles can be used in a wide range of areas, both by individuals and corporations.

In Japan, there is a safety standard called the Vehicle Law, and even if the method is technologically ground-breaking, like the method applied for this time, it is meaningless if it does not pass vehicle inspection in Japan. This construction method was designed and calculated to ensure that there are no problems from the viewpoint of automobile engineering and material mechanics.The results of various rigidity tests, stress measurements, etc. have recorded surprising numbers, and all cars can be passed official vehicle inspections in Japan. There is no problem in terms of practicality.

Vehicles that can be manufactured using this method.

In the first place, cars are not only used for valet cars or exhibitions, but also for commercial advertising, shuttle demo cars, etc., and above all, cars that are used by users in modern society and are even considered a part of fashion. From an important position, we can be sure from the trend of the times that the demand for these secondary manufactured vehicles will increase.

(b) Conventional technology Conventional secondary manufacturing of monocoque automobiles has been carried out using monohook reinforcement (that is, a method of welding a steel plate to the rib body with a bag).

It is an early method both as a concentrated stress dispersion method and in terms of technical difficulty. Moreover, this construction method is limited to opening two-door cars, and is not very rigid.

Furthermore, vehicles with a history of accidents have to be discarded due to rigidity issues even after construction work has been done, so careful consideration and investigation have been required each time when selecting a base vehicle.

In conventional manufacturing methods, parts of the car where stress is concentrated are reinforced one by one, so the center of the front axle and the center of the rear axle are only indirectly connected, resulting in low rigidity and lack of durability.

In addition, all the reinforcement is done by making iron plates into bags and connecting them to the inside and outside of the body, which spoils the exterior appearance, reduces the living space inside, and requires modification of the seats, etc.1 It was time consuming.

Furthermore, due to the lack of rigidity, it is susceptible to twisting, and problems such as water leakage occur frequently during rainy weather. This is the same whether it is an imported car or a domestically manufactured car.

For reference, the torsional rigidity of conventional construction methods is 0.4
It is around 5 kgm//rad. (Engineering standard is 0.3k
gm//rad) (c) Problems to be solved by the invention With this invention, there is no need to select a base material, it is possible to secondary manufacture various monocoque automobiles, and the rigidity is also improved compared to the conventional construction method. Comparatively, it's much better.

Additionally, the cost can be reduced to less than half compared to conventional construction methods.

The torsional rigidity of a vehicle constructed using this construction method is approximately 1.8 kgml1l/rad in the case of an open car.

Of course, compared to conventional construction methods, the buckling load, bending load, tensile stress, etc. are all higher, and the distortion of the entire body is reduced by half.

As mentioned above, secondary production such as opening of monocoque 4-door cars, production of limousine cars, production of multi-axle cars, etc., which was previously considered impossible in Japan, has become completely possible. did.

Naturally, in Japan, we have obtained approval from the Ministry of Transport and the Transport Bureau.
It can be sold as a genuine product.

(d) Means for Solving the Problems An example of implementing the present invention in the secondary production of a monohook automobile oven will be described below with reference to the drawings.

Figure 1 shows that when the roof is removed, the bending load is strengthened at the door opening, where the load is most concentrated, and the buckling load is strengthened throughout the body, which is incomparable to the rigidity achieved with conventional construction methods.
(For cars manufactured using conventional construction methods, the load applied to this location clogs the opening, and in many cases, the door cannot be opened or closed.) Thick pipes are mixed with several types of thin steel plates for stress dispersion. The sand inch reinforcement creates amazing rigidity.

This reinforcement creates a single line from the center of the front axle to the center of the rear axle, improving the bending and buckling loads of the entire body.

In FIG. 2, a high degree of torsional stiffness is created by implementing transverse reinforcement connecting the reinforcements on both sides described above.

Details are as follows.

(E) Action In Figure 1, it goes from the center of the front axle, through the hinge pillar, inside the side sill, through the rear wheel house, and to the center of the rear axle. -B section, rear wheel house section C-C section.

This is because the impact from the road surface received by the front axle applies a concentrated load to parts 1 and 2, which places a burden on the hinge pillar.
Prevent the door opening from becoming clogged.

It also prevents the shock received by the rear axle from applying a concentrated load to the part 3.

In addition, for reinforcement between the front and rear axes, diagonal cuts are made at the front and rear ends to distribute stress, so the stress generated from each axis is distributed in the front and rear.

For this reason, in use, it solves problems such as water leakage during rainy weather, provides cornering stability when driving at high speeds, and prevents the body from shaking when driving on rough roads.

It is connected to sex.

Furthermore, since passenger cars are used for many years, durability and safety are essential. When manufactured using this method, the load on each part of the entire body is reduced, and greater durability can be expected.

(c) Effects of the Invention As explained above, this Sand German Che method is not limited to the secondary production of two-door monochrome oven cars, but also monocoque four-door oven cars, ultra-long limousine cars, and multi-purpose oven cars. Various practical +1 ton products such as axles can be manufactured at low cost, making generalization possible, which has been difficult until now.

Another advantage of this invention is that the construction is simple because there is a principle of connecting one front and rear shaft (ffi welding) regardless of the detailed analysis.

[Brief explanation of the drawing]

The figures show construction examples using the construction method of this invention. The first figure is a side view and cross-sectional view of reinforcement on both sides, and the second figure is an overall reinforcement diagram, a side view of cross-reinforcement, and a cross-sectional view. It shows a cross-sectional view.

Claims (1)

[Claims] This is a reinforcement method that is the basis for the secondary production of 2-door and 4-door vehicles into open cars, limousines, etc. for all monocoque cars produced by automobile manufacturers, and is fundamentally different from previous production methods. In order to ensure maximum rigidity by making intensive use of each cavity of a monocoque car, we used thick pipes and angles, and at the connection points with the body, we used several types of thin steel plates. This is a secondary manufacturing method for monocoque automobiles that takes into account the distribution of concentrated stress on the body. (sandwich method)