China National Heavy Duty Truck Enhances Overall Quality and Comfort of HOWOA7 Seat
The quality department of CNHTC Rubber & Plastics Manufacturing Department has carefully decomposed the quality objectives of each stage of the “second startup†project. T11 quality objectives have been formulated from pre-sales, after-sales, and overall, divided into A and B. Targets for the time period, and some products with high after-sales failure rates were included in the Pioneer Party project.
Take systemic measures to improve quality management
From the beginning of 2011, each quality research group has continuously researched and analyzed the after-sales failure mode and domestic and foreign advanced benchmarking products around the responsible products, and looked for gaps in aspects such as design and development, processing and manufacturing, product inspection, production logistics, and after-sales service. Follow the PDCA method to catch quality. Such as regular quality meetings and quality scheduling meetings, process product quality survey, strengthen the quality control of procurement products.
In order to accurately grasp the after-sales failure mode of the HOWO A7 seat, the manufacturing department often led members to stand in the scorching sun and braved the cold weather in the storage area of ​​the old parts of the West Plaza. A question was studied for several hours, whether it was in a hot purchasing warehouse, a production site, or In the old storage area under the autumn rain, you can always see the quality research team to check the product quality and research product failure mode.
China Heavy Crude Rubber & Plastics Manufacturing Department's quality research team established a rapid after-sales response mechanism and visits system, and led members to conduct on-site analysis of the returned after-sales old parts and devoted themselves to product quality improvement implementation projects. At present, the quality of physical products has been significantly improved, and the major products have experienced a significant decrease in the after-sales failure rate. Among them, the fuel tank dropped by 93.64%, the HOWO A7 seat decreased by 87.63%, the wedge-shaped support dropped by 65.24%, the heater assembly decreased by 84.38%, and the water valve dropped. 90.30%. 
Play an exemplary role in improving the overall quality of HOWO A7 seats
The HOWO A7 seat is one of the main products of the CNHTC Rubber and Plastics Manufacturing Department. Due to its high comfort and high technology content, the HOWO A7 seat is welcomed by users. However, due to various reasons, the after-sales failure of the product is high. China National Heavy Duty Truck & Rubber Products Manufacturing Co., Ltd. listed "A7 Seat Quality Improvement" as one of the Pioneer No. 1 projects in 2011 and implemented it as a key task.
Firstly, a quality improvement team was established. The quality improvement department, technical department, processing department, and workshop backbone technicians jointly formed the HOWO A7 seat in various aspects. The improvement team actively went to the service station and the user to understand the seat usage. The quality improvement of HOWO A7 seat was improved. In order to find out the actual fault situation of HOWO A7 seat, the working mode of the old seat parts was often used on the weekends to the old central library. In order to form a complete rectification report, overtime shifts are often studied to solve product quality problems.
The heavy-duty rubber parts manufacturing department of China National Heavy Duty Truck Co., Ltd. has achieved significant improvement in the quality of its HOWO A7 seat products by implementing the following improvement measures for all employees:
(1) The improvement of the backrest locking mechanism has solved the problem that the backrest locking mechanism is easy to break through structural adjustment, and effectively reduces the after-sales claim.
(2) Manufacturing assembly aids to adjust the valve core to the middle position when the height valve is assembled to ensure the consistency of the assembly, thereby solving the problem that the height valve adjustment is not in place.
(3) Add a fixed point to the height valve puller, and use the strap to fix the puller to the outer pull arm at the bent position of the valve body connection. This solves the problem that the height of the valve puller is loose and the adjustment is not in place.
(4) increase the shock absorber fixed shaft strength, on the basis of the original shock absorber fixed shaft diameter (step shaft), and the use of nut-type anti-off, to solve the shock absorber fixed shaft fracture and the pin off problem.
(5) Add lubricated sleeves to the hinges of the inner and outer brackets.
(6) To improve the tolerance requirements for the inner hole size of nylon bearings and sliders, and to change the size diameter of connecting shafts, nylon bearings, and sliders from 9 to 11 mm, to reduce the seat clearance, and to solve the problem of loose seats.
(7) Replacing domestic air bags with imported air bags and using plastic fastening bolts.
(8) Carry out comprehensive seat performance test to test seat defects and facilitate targeted quality improvement.
The quality improvement of the HOWO A7 seat has also led to the improvement of the quality of a series of key products such as aluminum alloy fuel tanks, high-grade wire harnesses, heaters, and wedge-shaped supports. During the “second venture†process, it has provided advice and suggestions through full participation. Taking full advantage of the pioneering role, the quality of various major products of China National Heavy Duty Rubber and Plastics Manufacturing Department has been greatly improved.
The driver can adjust the front and rear angles of the seat according to different body types to ensure that in the most comfortable sitting position, the airbag cushioned seats can be matched with the four shock absorbing airbags of the driver's cab to minimize the fatigue caused by road bumps to the driver.
The AMT gearbox cancels the clutch and the left side has a rest pedal to keep the left leg in one of the most comfortable positions. Long-time driving will not cause fatigue. Above the pedal is a steering wheel adjustment structure, which can be adjusted according to the driver's sitting position to the right position after stepping on.
The lower sleeper has a split design. The middle sleeper can be raised as a table. At rest, it can be used as a dining table, or even on a computer.
A7 cab four-point airbag suspension cabin, airbags used in Germany horse brand products, WABCO airbag adjustment agencies, WABCO is a world-renowned pneumatic experts, A7 air compressor, ABS, brake valve, clutch master cylinder and All parts of the subpumps are WABCO products.
In the construction of the three-dimensional parking garage, it is often encountered that the self-propelled ramp cannot be used due to the small site. In order to transport the vehicles to different levels for access to the vehicles, it is necessary to use a vertical lift for vehicles. This can replace the ramp for cars to enter and exit the garage, greatly saving space and improving the utilization rate of the garage. This kind of special car elevator is often used for underground or roof and building self-propelled garage to access cars.
Four post car lift emergency stop device, emergency stop button, that is, if an emergency occurs during operation, press the emergency stop button to make the system stop until the fault is eliminated. Buffer device: in order to reduce the impact when the elevator descends, a buffer is set in the pit to reduce the impact. Limit switch: in order to prevent the elevator from hitting the top or exceeding the operating area, a limit switch shall be set to stop the elevator automatically when reaching the limit position. Hydraulic safety valve: in case of oil pipe bursting or sudden unloading, the safety valve will automatically close to prevent the carrier plate from falling and avoid accidents. A device for preventing the motor from idling and adjusting the lowering level of the carrier.
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