Improved structure of a mixer truck carrying reinforcement

Abstract

The utility model discloses a kind of stirring vehicle bearing reinforcement improved structure, belong to engineering vehicle technical field, including car beam, front bridge frame, front leaf spring, rear leaf spring and rear balance shaft assembly, it is characterized by: the front leaf spring is fixed with grommet component between the front bridge frame by U-shaped bolt, the grommet component is used to increase the vertical distance between car beam and front bridge frame;The position of the rear portion of the car beam corresponds the rear balance shaft assembly and is fixed with inner lining plate. The improved structure is on the basis of original vehicle type, by increasing front suspension grommet and rear portion inner lining reinforcing plate, improve bearing capacity, solve the problem of insufficient suspension strength and steering system interference. Change range is small, no new mould is needed, cost is low, development cycle is short, can quickly meet market demand, improve vehicle stability and reliability, while guarantee normal use of customer.

Description

Technical Field

[0001] This utility model belongs to the field of engineering vehicle technology, and in particular relates to an improved load-bearing structure for a concrete mixer truck. Background Technology

[0002] With the continued growth in overseas market demand for heavy-duty concrete mixer trucks, traditional 10-cubic-meter mixer trucks (total weight 38 tons) are no longer sufficient to meet the application scenarios of current 12-14 cubic meter (total weight 44-50 tons) level products. The customer requested a rapid increase in load-bearing capacity based on existing models, requiring the vehicle to be equipped with a 9-ton front axle and a 16-ton rear axle. However, due to the outdated structure of the customer-specified base model, issues such as limited layout space and insufficient adaptability exist. Furthermore, developing a new platform faces high costs and long lead times, making it impossible to quickly respond to market demands. Therefore, it is necessary to perform load-bearing enhancement modifications based on the existing base model.

[0003] Analysis of the basic vehicle structure revealed several defects after load-bearing enhancement. Specifically, the front suspension lacks strength under high load conditions, prone to "reverse bowing," leading to suspension deformation and affecting driving stability and safety. The rear suspension structure is susceptible to fatigue cracking under long-term heavy load operation, exhibiting poor reliability and failing to meet service life requirements. Furthermore, the chassis exhibits localized stress concentration under continuous high load conditions, posing a potential risk of structural cracking and severely restricting the improvement of overall vehicle load-bearing performance and platform extension capabilities. On the other hand, while a reinforced leaf spring structure is used for the front axle, although it offers higher load-bearing capacity, its overall height is reduced compared to existing leaf spring structures. If the vehicle's original chassis layout remains unchanged, this will cause spatial interference or insufficient clearance between the steering tie rod assembly and the intermediate tie rod assembly in the middle of the chassis beam, posing a risk of collision or jamming during operation, thus affecting the vehicle's steering reliability and handling stability. Therefore, it is necessary to design a structure suitable for strengthening and improving the load-bearing capacity of the basic concrete mixer truck. Utility Model Content

[0004] In view of the problems of structural failure of the front and rear suspensions and frame, as well as interference of the steering system, that exist in the process of modifying the basic vehicle model to enhance load-bearing capacity in the existing technology, this utility model provides an improved structure for strengthening the load-bearing capacity of a mixer truck.

[0005] This utility model is implemented as follows: a reinforced and improved load-bearing structure for a mixer truck, comprising a beam, a front axle frame, a front leaf spring, a rear leaf spring, and a rear balance shaft assembly, characterized in that: a pad component is fixed between the front leaf spring and the front axle frame by U-bolts, the pad component being used to increase the vertical distance between the beam and the front axle frame; an inner liner plate is fixed at the rear of the beam corresponding to the position of the rear balance shaft assembly.

[0006] In the above technical solution, preferably, the inner lining plate is constructed as a right-angled plate with an L-shaped cross section and extends along the axial direction of the vehicle beam, and the inner lining plate is fixed at the inner corner of the vehicle beam.

[0007] In the above technical solution, preferably, the U-bolt forms a lateral limit on the pad component.

[0008] In the above technical solution, preferably, a reinforcing plate is connected between the upper inner lining plate and the lower inner lining plate.

[0009] In the above technical solution, preferably, the reinforcing plate is composed of C-shaped plates and clamping plates, the two clamping plates are used to fix and clamp the two C-shaped plates, the upper part of the two C-shaped plates is connected to the upper inner lining plate, and the lower part of the two C-shaped plates is connected to the lower inner lining plate.

[0010] This reinforced and improved structure for the mixer truck is an optimized design based on the existing base model. By adding pad components to the front suspension to increase the vertical distance between the front axle frame and the chassis beam, interference between the steering tie rod assembly and the ball joint of the intermediate tie rod assembly is effectively avoided, ensuring the normal operation of the steering system and handling stability. Simultaneously, an L-shaped inner liner and a reinforcing plate composed of C-shaped plates and clamping plates are installed at the rear of the chassis beam corresponding to the rear balance shaft assembly, significantly improving the structural stiffness and load-bearing capacity of the rear suspension area. This avoids common problems in traditional structures such as leaf spring camber, suspension cracking, and chassis fatigue damage. This improvement scheme fully considers the layout limitations of the customer-specified older base model structure, achieving a balance between increased load-bearing capacity and structural safety. Without adding new major components or developing new molds, overall performance is improved through only localized structural optimization. Due to the small modifications and strong adaptability of the solution, the product development cycle is greatly shortened, meeting the urgent needs of overseas markets for heavy-duty mixer trucks and enhancing the overall market competitiveness of the vehicle. At the same time, this structural solution makes full use of existing resources and production processes, reduces development costs, effectively improves the economy and reliability of the product, has no adverse effects on the use of customers' vehicles, and achieves a dual improvement in technology and economic benefits. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the front axle frame structure in this utility model; Figure 2 This is a schematic diagram of the outer side of the rear balance shaft assembly in this utility model; Figure 3 This is a schematic diagram of the inner side of the rear balance shaft assembly in this utility model. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0013] To address the problems of structural failure in the front and rear suspensions and chassis, as well as steering system interference, that exist in existing technologies involving modifications to basic vehicle models to enhance load-bearing capacity, this utility model provides an improved load-bearing structure for concrete mixer trucks. To further illustrate the structure of this utility model, a detailed description is provided below in conjunction with the accompanying drawings: Please see Figure 1 , Figure 2 and Figure 3 A reinforced and improved load-bearing structure for a mixer truck includes a beam 1, a front axle frame 2, a front leaf spring 3, a rear leaf spring 4, and a rear balance shaft assembly 5. As existing technology, the beam, front axle frame, front leaf spring, rear leaf spring, and rear balance shaft assembly are common structural components of heavy-duty trucks such as mixer trucks. The chassis beam is the main load-bearing component of the vehicle, composed of high-strength steel longitudinal beams arranged longitudinally on both sides. It supports the engine, cab, axle, and superstructure, and bears the dynamic and static loads during vehicle operation. The front axle frame is located at the front of the chassis and is used to install the front axle, steering system, and front suspension structure. It is a key connecting bracket for realizing the front wheel guidance function. The front and rear leaf springs are located in the suspension systems of the front and rear axles of the vehicle, respectively. They are multi-leaf steel spring structures and are mainly used to buffer road impacts, bear the weight of the vehicle, and maintain the vehicle's posture. The rear balance shaft assembly is mostly used in dual rear axle drive systems. It connects the two rear axles through a balance beam structure and plays a role in balancing the load and coordinating the vertical movement of the rear axle during vehicle operation, thereby improving the vehicle's load-bearing stability and passability under complex road conditions.

[0014] A pad component 7 is fixed between the front leaf spring and the front axle frame via U-bolts 6. The pad component increases the vertical distance between the vehicle beam and the front axle frame. The U-bolts provide lateral restraint to the pad component. The pad component is preferably made of high-strength metal or rubber-metal composite material to provide good load-bearing capacity and cushioning characteristics. The pad component increases the vertical distance between the front axle frame and the vehicle beam, thereby increasing the compression stroke of the front axle suspension and enhancing the cushioning capacity and stability of the front of the vehicle under full load or complex operating conditions. On the other hand, the increased vertical distance also effectively increases the space clearance between the steering tie rod assembly 8 mounted on the front axle and the ball joint of the intermediate tie rod assembly 9 mounted on the vehicle beam, avoiding interference, collision, or damage between the steering tie rod and the ball joint during vehicle operation due to the relatively compact structure, thus improving the operational reliability and service life of the entire vehicle steering system. U-bolts penetrate the pad component and lock it to the front axle frame, structurally providing reliable lateral restraint to the pad component and preventing lateral displacement or loosening under vibration or impact during vehicle operation. Furthermore, the pad component can have positioning protrusions or restraining structures on its lower surface that mate with the front axle frame to further enhance its installation stability. Through these structural improvements, without increasing the complexity of the front axle frame design, functional optimization of the connection between the front axle and the vehicle beam and coordinated matching of the steering system layout space are achieved.

[0015] An inner liner 10 is fixed at the rear of the vehicle beam, corresponding to the position of the rear balance shaft assembly. The inner liner is constructed as a right-angled plate with an L-shaped cross-section and extends along the axial direction of the vehicle beam. The inner liner is fixed at the inner corner of the vehicle beam. A reinforcing plate connects the upper inner liner and the lower inner liner.

[0016] Specifically, the inner liner plate includes a vertical section and a horizontal section, which are respectively attached to and fixed to the inner vertical plate and bottom plate of the vehicle beam to enhance the local strength and rigidity of the vehicle beam in this area and prevent local deformation or cracking of the vehicle beam caused by the concentrated load of the rear balance axle assembly. The inner liner plate is firmly fixed to the inner corner of the vehicle beam by high-strength bolts and other means to ensure a reliable load-bearing connection between it and the vehicle beam structure. A reinforcing plate 11 is provided between the inner liner plates above and below the vehicle beam. The reinforcing plate is constructed as a structural component that vertically connects the upper and lower inner liner plates to further enhance the shear resistance and overall structural rigidity of this area, while limiting the relative displacement between the upper and lower inner liner plates to prevent loosening of the connection or fatigue damage caused by alternating loads. This structure effectively improves the load-bearing capacity and durability of the rear axle area while ensuring that the original overall structural layout of the vehicle beam remains unchanged, and is particularly suitable for mixer trucks that are frequently used under heavy-duty conditions.

[0017] The reinforcing plate consists of C-shaped plates and clamping plates, specifically two C-shaped plates and two clamping plates forming a symmetrical clamping structure. The two C-shaped plates are respectively located on the left and right sides of the vehicle beam. Each C-shaped plate has a "C"-shaped bend, with its upper end connecting to the inner lining plate above the vehicle beam and its lower end connecting to the inner lining plate below the vehicle beam, thus forming a reliable structural connection with the upper and lower inner lining plates, achieving longitudinal connection and force transmission between the upper and lower inner lining plates. To ensure a strong connection between the C-shaped plates and the inner lining plates and good tensile and shear resistance, welding, bolts, or screws are preferred as fixing methods. Clamping plates are installed on the outer sides of the two C-shaped plates, and the two clamping plates are symmetrically installed using bolts or other fasteners to clamp and fix the C-shaped plates on both sides, forming an integrated reinforcing structure. This structural design firmly presses the C-shaped plates together with clamping plates, which not only improves the assembly strength and overall stability, but also facilitates manufacturing and subsequent maintenance and disassembly. It effectively enhances the bending stiffness and fatigue resistance of the rear beam under the load of the rear balance shaft assembly, thereby improving the load-bearing performance and structural reliability of the whole vehicle under complex working conditions.

[0018] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A reinforced and improved load-bearing structure for a concrete mixer truck, comprising a beam, a front axle frame, front leaf springs, rear leaf springs, and a rear balance shaft assembly, characterized in that: A pad component is fixed between the front leaf spring and the front axle frame by a U-bolt. The pad component is used to increase the vertical distance between the vehicle beam and the front axle frame. An inner liner plate is fixed at the rear of the vehicle beam corresponding to the position of the rear balance shaft.

2. The improved load-bearing structure for mixer trucks according to claim 1, characterized in that: The inner lining plate is constructed as a right-angled plate with an L-shaped cross-section and extends along the axial direction of the vehicle beam. The inner lining plate is fixed at the inner corner of the vehicle beam.

3. The improved load-bearing structure for mixer trucks according to claim 2, characterized in that: The U-bolt provides lateral restraint to the pad component.

4. The improved load-bearing structure for mixer trucks according to claim 3, characterized in that: A reinforcing plate connects the upper inner lining plate to the lower inner lining plate.

5. The improved load-bearing structure for mixer trucks according to claim 4, characterized in that: The reinforcing plate is composed of C-shaped plates and clamping plates. The two clamping plates clamp the two C-shaped plates. The upper part of the two C-shaped plates is connected to the upper inner lining plate, and the lower part of the two C-shaped plates is connected to the lower inner lining plate.

Images