An In-depth Look at the Concrete Mixer Truck PMP 7.1R130 Gearbox
The PMP 7.1R130 gearbox is a remarkable piece of engineering specifically tailored for concrete mixer trucks. It serves as the mechanical heart that enables these behemoths to function optimally in the demanding construction environment.
1. Structural Integrity and Durability
Constructed with utmost precision, the gearbox housing is fabricated from high-quality materials. Often, a combination of cast iron and alloy steel is utilized to strike the perfect balance between strength and weight. The cast iron provides excellent rigidity to withstand the constant vibrations and shocks experienced during the operation of a concrete mixer truck. These vibrations can originate from the rough terrains traversed, the rotation of the mixer drum, or the engine's running. Meanwhile, the alloy steel components enhance the overall toughness and resistance to fatigue.
Internally, the gears are meticulously machined to exacting tolerances. They are made from hardened alloy steel, which endows them with superior wear resistance. This is of paramount importance as the gears are constantly meshing and transmitting high levels of torque. The bearings and shafts are also of top-notch quality, ensuring smooth rotation and minimal friction. With proper lubrication, which we will delve into later, these components can endure years of heavy use without significant degradation.
2. Gear Ratio and Torque Transmission
The 7.1R130 designation holds the key to its gear ratio configuration. This specific ratio is carefully calculated to meet the unique requirements of concrete mixer trucks. It allows for efficient torque multiplication at low speeds, which is essential when starting the vehicle laden with a heavy load of concrete or when climbing steep inclines on construction sites.
When the engine generates power, the gearbox steps in to translate that power into the appropriate rotational force for the wheels and the mixer drum. The torque converter, if part of the setup, further augments this process. It acts like a fluid coupling that smoothens the transfer of power, preventing jerky starts and sudden drops in power delivery. This means that whether the truck is accelerating from a standstill or maintaining a steady speed while transporting concrete, the gearbox ensures a seamless flow of torque.
3. Lubrication and Cooling Mechanisms
Proper lubrication is the lifeblood of the PMP 7.1R130 gearbox. A dedicated lubrication system pumps oil to all the critical moving parts. This oil forms a thin film that reduces friction between gears, bearings, and shafts. It not only minimizes wear but also dissipates heat generated by the meshing gears.
To complement the lubrication system, a sophisticated cooling arrangement is in place. The gearbox is often equipped with an oil cooler, which can be air-cooled or liquid-cooled depending on the design. In addition, the external housing may have fins that increase the surface area for heat dissipation. This dual cooling approach ensures that the gearbox operates within the optimal temperature range, even during extended periods of heavy use in hot weather or under strenuous workloads.
4. Shift Control Systems
There are primarily two types of shift control mechanisms available for this gearbox: manual and automated. Manual shift systems offer drivers a hands-on experience. The shift lever is ergonomically designed for easy reach and operation. It provides tactile feedback as the driver engages different gears, allowing them to have precise control over the vehicle's speed and power output. This can be advantageous in situations where the driver needs to make quick adjustments based on the terrain or load conditions, such as when navigating through narrow construction alleys or dumping concrete on uneven ground.
Automated shift systems, on the other hand, rely on advanced electronics. These systems incorporate sensors that monitor variables like vehicle speed, engine load, and throttle position. Based on this data, an electronic control unit (ECU) determines the optimal gear to engage. This not only reduces driver fatigue but also optimizes fuel efficiency and overall vehicle performance. For example, during long highway hauls, the automated system can seamlessly shift gears to maintain the most economical speed.
5. Compatibility with Truck Systems
The PMP 7.1R130 gearbox is designed to integrate flawlessly with the other components of a concrete mixer truck. Its input shaft is precisely matched to the engine's output, ensuring a smooth transfer of power. The output shafts, in turn, are configured to connect to the drive axles and the mixer drum drive mechanism.
The mounting points and brackets on the gearbox are engineered to fit snugly onto the truck chassis. This compatibility extends to the electrical and hydraulic systems as well. The gearbox may need to communicate with the truck's onboard computer for functions like shift control and diagnostic purposes. It also has to work in harmony with the hydraulic system that powers the rotation of the mixer drum, ensuring synchronized operation.
6. Maintenance and Troubleshooting
Maintenance of the gearbox is relatively straightforward, thanks to its thoughtful design. There are easily accessible ports for oil changes, filter replacements, and inspections. Regular oil changes are crucial to keep the lubrication system in top shape. The filters need to be replaced periodically to prevent contaminants from entering the gearbox and causing damage.
In case of any issues, the gearbox is equipped with diagnostic ports and sensors that can provide valuable information to technicians. Manufacturers typically supply detailed service manuals that outline the steps for troubleshooting common problems. Whether it's a noisy gear, a slipping shift, or an overheating issue, these manuals guide technicians through the process of identifying and rectifying the problem.
7. Performance in Real-world Scenarios
In the construction field, the PMP 7.1R130 gearbox has consistently delivered outstanding results. It has enabled concrete mixer trucks to make timely deliveries of freshly mixed concrete to job sites. When faced with challenging terrains, such as muddy construction sites or steep hillsides, the gearbox's torque multiplication capabilities prove invaluable.
Fleet operators have reported fewer breakdowns and increased productivity with trucks equipped with this gearbox. The combination of its durability, efficient power transfer, and reliable shift control has made it a favorite among professionals in the industry. It not only meets the current demands of the construction sector but also holds the potential for future enhancements as technology continues to evolve.
In conclusion, the Concrete Mixer Truck PMP 7.1R130 Gearbox is a pinnacle of engineering excellence. It combines strength, precision, and functionality to support the essential role that concrete mixer trucks play in building our infrastructure. As the construction industry progresses, this gearbox is poised to adapt and continue serving as a reliable backbone for these vital vehicles.
Model NO. |
7.1R130 |
Model |
7.1R130 |
Lead Time |
5 Days |
Transport Package |
Standard Export Wooden Case |
Colour |
as Your Request |
Usage |
Concrete Mixer |
Weight |
330KG |
Specification |
56*56*68 |
Trademark |
Bodeke |
Origin |
China |
HS Code |
8483402000 |
Production Capacity |
100 Sets/Month |
Technical data of Camray CMR conrete mixer gearbox |
Model |
7.1R130 |
Max.Output Torque Nm |
71,000 |
Ratio l= |
1:130 |
Max.installation angle of Drum |
11° |
Max.Input speed rpm |
2500 |
Max.Output speed rpm |
18 |
Max.Capacity of Drum m³ |
10~14 |
Weight(without oil) KG |
320 |
Lubrication Oil Quantity dm³ |
11.5 |
Max.Misalignmeng of flange |
+/-6° |
FAQs about Mixer Truck Speed Reducer
Q1: What is a mixer truck speed reducer?
A1: A mixer truck speed reducer is a mechanical device that reduces the speed of the mixer truck's motor, increasing torque and allowing for more effective mixing. It helps to transfer power from the motor to the mixer drum more efficiently, ensuring smooth and consistent mixing.
Q2: Why is a speed reducer necessary for mixer trucks?
A2: A speed reducer is necessary for mixer trucks because it matches the speed and torque requirements of the mixer drum to the output of the truck's motor. By reducing the speed, the reducer amplifies the torque, allowing the mixer drum to rotate at the optimal speed for mixing, while minimizing wear and tear on the motor.
Q3: How does a mixer truck speed reducer work?
A3: A mixer truck speed reducer typically consists of a series of gears or other mechanical components that transfer power from the motor to the mixer drum at a reduced speed. These gears are designed to mesh together, reducing the speed of rotation while increasing torque. This allows the mixer drum to rotate at a slower, more controlled speed, ensuring effective mixing.
Q4: What are the benefits of using a mixer truck speed reducer?
A4: Using a mixer truck speed reducer provides several benefits. It increases the torque output of the motor, allowing the mixer drum to rotate more effectively and mix materials more thoroughly. Additionally, it reduces wear and tear on the motor by matching the speed and torque requirements of the mixer drum, extending the motor's lifespan. Furthermore, a speed reducer can improve the overall efficiency of the mixer truck, reducing fuel consumption and operational costs.
Q5: How often should a mixer truck speed reducer be maintained?
A5: The frequency of maintenance for a mixer truck speed reducer depends on the specific model and manufacturer's recommendations. However, generally speaking, it is important to perform regular inspections and lubrication to ensure the reducer is operating smoothly and efficiently. Additionally, if any issues or malfunctions are noticed, it is crucial to address them promptly to prevent further damage or downtime. Regular maintenance can help extend the lifespan of the speed reducer and keep your mixer truck operating at peak performance.
Q6: What are the common issues that can arise with mixer truck speed reducers?
A6: Common issues that can arise with mixer truck speed reducers include wear and tear on gears, bearings, and other mechanical components. This can lead to reduced efficiency, increased noise, and ultimately, failure of the reducer. Lubrication issues, such as insufficient or contaminated lubricant, can also cause problems. Regular maintenance and inspection, as well as prompt repair of any issues, are crucial to preventing these common problems and ensuring the reliable operation of the speed reducer.
Q7.Are you manufacturer? And what's the delivery time?
A7:Yes, we are manufacturer and have our own factory. Generally, its in stock for common models, 25-30 days will be finished and sent to customer in time.
Q8.If we don't find what we want on your website, what should we do?
A8: You can email us the descriptions and pictures of the products you need, We will check whether we can make it.
Q9.How about the inspection and Guarantee of products?
A9:We promise: all products are tested before ship, to confirm it will be working and in good conditions when customers get. Also, we offer 12-month guarantee, if it doesn't work due to quality issue in the period, we will send spares to repair for free.
Bodeke Industrial Components Co., Ltd. is a leading Chinese company specializing in the manufacturing and maintenance of a wide range of industrial equipment components. Our products find application in diverse sectors, including cement tanker trucks, excavators, rescue equipment for cement trucks, mixers, cranes, hydraulic motors, hydraulic pumps, and other industrial machinery.
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Empower your industrial machinery with Bodeke - a leading Chinese manufacturer specializing in the repair and production of a wide range of equipment components.From cement tanker trucks and excavators to mixer trucks,cranes,hydraulic motors,and pumps,our precision-engineered products redefine reliability and performance.Elevate your operations with Bodeke's quality components-your trusted partner in global industrial excellence. |
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