Review of Mould King 19013 Dump Truck 8x8 Car Brick Toys on 9th Dec.
By From The Pubic of Wechat
December 9th, 2022
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Review of Mould King 19013 Technic Dump Truck 8x8 Car Building Blocks.
The front of the color box has a black background with a rendering of the finished product, and the top left corner indicates the set number, the age positioning of the 14+, and the number of parts.
The side of the color box also shows the power components included in the kit, as well as information on special parts such as pneumatic accessories and carbon fiber cross shafts, but the metal universal joint, which is also a special part, is not reflected here, which is also a small egg.
Open the color box, there are two parts sub-boxes inside. 5768 pieces of parts are divided into 34 parts sub-packages, 9 big steps. pf parts, as well as pneumatic accessories, are bagged separately.
A puzzle manual, including a total of 1135 steps, an average of 5 parts per step. Although the stickers are placed at the end, but the last to stick, there is no problem.
Piecing together a manual, including a total of 1135 steps, an average of 5 parts per step. Although the stickers are placed at the end, but the last to stick, there is no problem.
Here are two of the four sets of axles, which are basically the same structure. The power enters from the middle, along the front and rear directions respectively, and after passing through the suspension steering ball parts, it enters the two sets of drive axles. In the middle of the steering ball, where the power connection is made, metal universal joints are also provided in the kit.
After completing the drive axle module, you can see the design plan for the leaf spring suspension system. Here the designer is simulating the leaf spring suspension system by the elastic stress of the cross shaft itself. Also somewhat similar to the balance beam suspension structure, a very wonderful design, the specific effect will be tested in the finished product stage.
Here is the driving power linkage structure of two sets of drive axles. The designer has designed a power input interface on the left and right side, and the power is combined through two sets of 24:24 gears, and then after a set of 24:8 gears, the power is further transmitted backward. Next, the power is transmitted to the drive axle in both directions through a total of four 16-tooth gears from top to bottom. In the middle of the drive axle, at the differential end, there is a 28:12 gear set. Where the drive axle is suspended, no wheel side reduction is done. Therefore, the total driving power gear ratio is 7:1.
Here you can see part of the driving power structure of the first two sets of steering axles (which are also drive axles). Similar to the previous two sets of axles, the power is completed through two 24:24 gear sets that converge and then transmit towards the front of the car. Then, also through four 16-tooth gears, the power is transmitted downward to the suspension steering ball position. The structure here has one less 24:8 gear set than the two rear drive axle groups. There is also an additional 16-tooth gear at the top for the engine linkage structure.
The L motor on the other side is used for the linkage of the winch. It drives a 20-tooth gear that will later finish meshing with a 16-tooth gear on another module when the big module is combined.
Here you can see part of the steering wheel linkage structure. The steering power enters from the ball joint and is transferred to the roof through two 12:12 gear sets.
Further look at the subsequent linkage structure of the steering wheel. After the power comes from the bottom, it goes through one set of 12:12 and one set of 12:20 gears, and then the power reaches the steering wheel. However, there is a small error in the structure here, and we will provide a solution to improve it later.
The picture above shows the rear half of the chassis. It contains 2 sets of drive axles, and 2 XL motors that power them. For the suspension, a leaf spring suspension is simulated using the elastic stress of the cross shaft. Meanwhile, in the front of this module, there is another set of power structure, which will be connected to the front half of the chassis, and finally to the second set of drive axles at the bottom, which is also the steering axle, through five 16-tooth gears.
Pneumatic structure. After the air circuit comes out from the two pump, it first completes the convergence, and then divides into two circuits, which are connected to the pneumatic switches on both sides. These two switches are also to control the lifting action of the front and rear tipping bucket respectively.
Finished product appearance:
The whole appearance of the truck, or a relatively simple design style, is basically the overall color scheme of white, black and gray. In addition, the body is surrounded by some red and white twill reflective stripes as accents.
At the front, the huge black bat visual element makes this truck look handsome. The lower bumper, the lights on both sides, the mirrors on both sides of the cab, the interior center console, the blue-striped driver's seat, and the dome light and antenna above the cab have also been built.
So as you can see, the designer didn't use too many brick-like parts to create the ultimate detail, but used a more pragmatic building method. Naturally, such a design approach also brings a more solid overall structure to this truck. Therefore, although it weighs 5.7 kg, it will encounter little problem of parts falling off during handling and playing.
In addition, this design approach is also enough to allow players to focus more on the functional and playable aspects of this work.
Going down to the ground, a total of four XL motors were used, with power to each set of axles. The car is not very fast, but still very stable.
The steering of the vehicle, a total of two sets of steering axles, each using a servo motor. You can see that there is no problem. And especially worth mentioning is its handle control, this kind of rocker that can be operated on two channels at the same time, making this truck very flexible in terms of control.
The suspension aspect was also a test focus. The truck weighed 5.7 kg, but it had no problem passing obstacles of roughly three centimeters in height, and the suspension performance was relatively stable.
Climbing performance test. After the test, the climbing limit of this truck is about 25 degrees, and it can barely challenge to 30 degrees.
The front end winch, which uses an L motor, has no problem with the basic function. Further, in the extreme load test session, it was finally possible to lift three bottles of Coke, which is about one kilogram.
The front end winch uses an L motor to control two air pumps and two pneumatic actuators. The switch is located on the right side of the cab at the back. The test also did not have any problems.
After the front end is opened, you can see the engine linkage inside, as well as the operation of the air pump
Next is the lift of the tipping bucket. The motor and air pump are shared with the front end, but the designer used three pneumatic actuators here.
In addition, it is worth mentioning that the designer has designed a self-locking structure at the end of the bucket cover. When the bucket is lowered, the cover is not open; when the bucket is raised, it will open automatically.
As a fully functional dynamic version of the truck, we need to number and test all the motors and main controls first.
Also the air pump needs to be tested.
Next look at the collocation notes/suggestions for improvement.
The first is about the engine linkage. In the process of assembling, we found that the engine linkage will have the problem of abnormal noise and stalling. Specifically, the engine's crankshaft module and both sides of the casing are not flush with each other, thus leading to abnormal linkage.
This problem, because the two parts #62062 and #2854 have tolerances in the process of mating, and eventually the tolerances accumulate, resulting in a significant unevenness problem.
Also this problem is due to the fact that there is only one piston linkage in each cross shaft, whereas if two linkages are used like most of the other blocks, then this problem does not occur.
The solution is also very simple, just pull out each crosshair a little bit, and eventually make it flush at both ends. Then a little adjustment, the linkage will be very smooth.
The second problem is about the steering wheel and steering direction is the opposite of this problem.
To solve this problem is also relatively simple, just need to 567 steps of this 20 teeth gear, move to the opposite position can be. Of course, there are other modification methods, such as the 549 steps of the 12-tooth gear is also moved to the opposite position, can solve this problem.
Adjusting 567 steps is the most convenient, even in the finished stage, it only takes a few minutes to complete the correction.
Step 46, where a bushing should be added, can reduce the friction between the gear and the surrounding structure, while avoiding the problem of uncontrollable interference between the gear and the surrounding parts.
Step 123, the two illustrations got reversed, which is easy to find.
Step 229, the four #6536 directly according to the illustration method is not installed, you need to push the cross shaft first, and then install #6536, and then push back after installation.
Step 260 of the carbon fiber cross shaft is very hard, it is difficult to fit into the gear, it is recommended to use a longer unit of cross shaft cut short to solve. (1554)
Although it is a MOC work, this dump truck does not have any significant anti-human steps in the puzzle experience, but overall, it is still considered to be a high level of difficulty. For newcomers who are not very experienced in building, if they can pay more patience and do proper research during the building process, they will not encounter too many obstacles.
So, very clear structure structure, but also let players in the process of putting together can fully feel the designer from the whole, to the details of the clear design ideas.
That's all for today's content
Welcome to know more Details Here if you want to know more details! See you in the next time!
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