A suspension structure for mining dump trucks

Abstract

This utility model provides a suspension structure for a mining dump truck, including a suspension cylinder assembly disposed between the vehicle frame and the axle, and a pair of accumulators disposed on both sides of the frame. The suspension cylinder assembly includes a front axle cylinder disposed between the front axle and the frame, and at least two pairs of rear axle cylinders disposed between the rear axle and the frame. The number of rear axles corresponds to the number of rear axle cylinders. The rear axle cylinders and the accumulators disposed on the same side are connected to the oil chambers of the accumulators through accumulator valve blocks. The oil chambers of the accumulators on both sides are connected through hydraulic pipelines. This utility model achieves balance of cylinder extension and contraction on one side by setting accumulators that are only connected to the rear axle cylinders. By connecting the left and right accumulators, it maintains the balance of the frame under uneven loading conditions, avoiding the tilting of the truck body under uneven loading, reducing the probability of rollover accidents, and improving transportation safety.

Description

Technical Field

[0001] This utility model relates to a suspension structure for a mining dump truck, belonging to the field of engineering machinery technology. Background Technology

[0002] Mining vehicles are the backbone of mining transportation machinery. They work in harsh environments, travel on uneven roads year-round, and are usually under load. Therefore, the design of the shock absorption system for mining vehicles is essential to effectively prevent the vehicles from tilting or even overturning when traveling on rough roads.

[0003] The existing Chinese patent CN217835456U describes a hybrid dump truck. This patent discloses a technical solution including an energy storage device and multiple load-bearing cylinders. Each axle of the through-type double-wheel-side reduction drive axle assembly is equipped with at least one load-bearing cylinder. The energy storage device is connected to multiple load-bearing cylinders to regulate their pressure. Generally, the load-bearing cylinders on a single axle of mining vehicles are arranged symmetrically. According to the attached drawings of this application, the connection method between the energy storage device and the load-bearing cylinders in this technical solution is: "Axle cylinders on either side are connected to axle cylinders on the first and second axles, and cylinders on the third and fourth axles are connected; two energy storage devices on one side are connected." However, in mining vehicle applications, the load is concentrated on the rear axle, while the front axle serves as the driver's seat. In pure electric mining vehicles, the front axle is only used for steering, and its load is much lower than that of the rear axle. Therefore, adopting a scheme where the front and rear axles are connected, and the energy storage device is also connected simultaneously, results in design redundancy, increased manufacturing costs, and more complex hydraulic control. Furthermore, the failure rate increases in harsh environments. Meanwhile, under uneven load conditions, the left and right sides of the axle are subjected to different pressures. The single-sided adjustment method can only ensure the balance between the cylinders on one side, and cannot ensure the balance between the left and right sides at the same time. When the load is uneven, the vehicle will tilt, and the probability of overturning is greater when driving on rough roads.

[0004] Therefore, in order to reduce production costs while ensuring vehicle operational stability and reducing failure rates, there is an urgent need for a suspension structure for mining dump trucks to solve the aforementioned technical problems. Summary of the Invention

[0005] Purpose of the invention: To address the shortcomings of existing technologies, this utility model provides a suspension structure for mining dump trucks. By setting up an accumulator that connects only to the rear axle cylinder, the extension and retraction of the cylinder on one side can be balanced. By connecting the left and right accumulators, the vehicle frame can still be balanced under uneven loading conditions, avoiding the phenomenon of the truck body tilting under uneven loading, reducing the probability of rollover accidents, and improving transportation safety.

[0006] Technical solution: A suspension structure for a mining dump truck includes a suspension cylinder assembly disposed between the vehicle frame and the axle, and a pair of accumulators disposed on both sides of the frame. The suspension cylinder assembly includes a front axle cylinder disposed between the front axle and the frame, and at least two pairs of rear axle cylinders disposed between the rear axle and the frame. The number of rear axles corresponds to the number of rear axle cylinders. The rear axle cylinders and the accumulators disposed on the same side are connected to the oil chambers of the accumulators through accumulator valve blocks. The oil chambers of the accumulators on both sides are connected through hydraulic pipelines.

[0007] This invention achieves balanced cylinder extension and retraction on one side by setting an accumulator that connects only to the rear axle cylinder. By connecting the left and right accumulators, the chassis balance can be maintained even under uneven load conditions, preventing the cargo box from tilting under uneven load, reducing the probability of rollover accidents, and improving transportation safety. At the same time, the front axle cylinder is independently controlled and does not participate in cylinder adjustment under load conditions, reducing the frequency of use of the front axle cylinder, increasing its service life, reducing the number of accumulators required, and lowering production costs.

[0008] The accumulator valve block is provided with oil holes that communicate with the rear axle cylinders. The number of oil holes matches the number of rear axle cylinders. The oil holes are connected to the accumulator oil chamber through an oil inlet channel and an oil return channel. An adjustable damping block is provided on the oil return channel. The flow rate of hydraulic oil in the oil circuit can be controlled by replacing the adjustable damping block.

[0009] When the rear axle is multi-axle, the oil holes and inlet / outlet channels of the accumulator valve block are matched with the number of rear axle cylinders. It has a built-in replaceable adjustable damping block with different oil hole sizes to control the oil flow speed. By limiting the oil speed, the speed of the oil when returning to the rear axle cylinder can be controlled, which plays a buffering role and ensures driving comfort while ensuring smooth transportation.

[0010] A limit support is provided on the axle near the bottom of the frame, and a shock-absorbing pad is provided between the limit support and the frame. The shock-absorbing pad is fixedly installed on the upper side of the limit support.

[0011] By setting up shock-absorbing pads and limit supports, when the compression of the rear axle cylinder is large, the energy is absorbed through the compression deformation of the shock-absorbing pads, preventing the telescopic rod in the rear axle cylinder from hitting the cylinder barrel and causing damage and leakage to the cylinder, thereby reducing the failure rate of the rear axle cylinder and increasing its service life.

[0012] A limit support is provided on the axle near the bottom of the frame, and a shock-absorbing pad is provided between the limit support and the frame. The shock-absorbing pad is fixedly installed on the lower side of the frame.

[0013] The side plate of the frame has through holes corresponding to the position of the accumulator oil chamber, and the accumulators on both sides are connected to the hydraulic pipelines that are connected to the accumulator oil chamber through the through holes.

[0014] To facilitate the connection of the accumulators on both sides, as well as to facilitate the setting of the oil circuit and protect the safety of the oil circuit, the connection of the accumulators on both sides is set inside the frame rather than around it, reducing the oil transmission stroke and enabling instantaneous adjustment on both sides, resulting in better stability during vehicle operation.

[0015] The accumulator can be detachably mounted on the frame via a mounting bracket that is fixedly connected to the side of the frame.

[0016] To facilitate the installation and disassembly of the accumulator, as well as the assembly and disassembly of its piping, the accumulator is installed using a mounting bracket, making subsequent maintenance more convenient and faster. This also ensures a more stable installation of the accumulator, allowing it to maintain good working condition even in complex environments.

[0017] The front axle cylinder and the rear axle cylinder are respectively hinged to the outer side of the frame and the corresponding axle end.

[0018] In order to achieve the vertical displacement of the axle, both the front axle cylinder and the rear axle cylinder can effectively buffer and dampen the shock, and the hinged ends can adapt to the complex and ever-changing cylinder movements.

[0019] Beneficial effects: This utility model achieves balance in the extension and retraction of the cylinder on one side by setting an accumulator that connects only to the rear axle cylinder. By connecting the left and right accumulators, the vehicle frame can still be balanced under uneven load conditions, avoiding the phenomenon of the cargo box tilting under uneven load, reducing the probability of rollover accidents and improving transportation safety. At the same time, the front axle cylinder is independently controlled and does not participate in the cylinder adjustment under load conditions, reducing the usage frequency of the front axle cylinder, increasing the service life of the front axle cylinder, reducing the number of accumulators required, and reducing production costs.

[0020] It features built-in replaceable adjustable damping blocks with different orifice sizes to control the oil flow speed. By limiting the oil speed, the speed of the oil when returning to the rear axle cylinder can be controlled, thus playing a buffering role and ensuring driving comfort while maintaining stable transportation.

[0021] By setting up shock-absorbing pads and limit supports, when the compression of the rear axle cylinder is large, the energy is absorbed through the compression deformation of the shock-absorbing pads, preventing the telescopic rod in the rear axle cylinder from hitting the cylinder barrel and causing damage and leakage to the cylinder, thereby reducing the failure rate of the rear axle cylinder and increasing its service life. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 This is a diagram of the overall installation structure of this utility model.

[0024] Figure 2 This is a partial view of the installation of this utility model.

[0025] Figure 3 This is a schematic diagram of the hydraulic principle of the accumulator of this utility model. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. Example

[0029] like Figures 1 to 3As shown, a suspension structure for a mining dump truck includes a suspension cylinder assembly disposed between the vehicle frame and the axle, and a pair of accumulators 1 disposed on both sides of the frame. The suspension cylinder assembly includes a front axle cylinder 2 disposed between the front axle and the frame, and at least two pairs of rear axle cylinders 3 disposed between the rear axle and the frame. The number of rear axles corresponds to the number of rear axle cylinders 3. The rear axle cylinders 3 and the accumulators 1 disposed on the same side are connected to the oil chamber of the accumulators 1 through an accumulator valve block 4. The oil chambers of the accumulators 1 on both sides are connected through hydraulic pipelines.

[0030] This invention achieves balance in the extension and retraction of the cylinder on one side by setting an accumulator 1 that is only connected to the rear axle cylinder 3. By connecting the left and right accumulators 1, the vehicle frame can still be balanced under uneven load conditions, avoiding the phenomenon of the cargo box tilting under uneven load, reducing the probability of rollover accidents and improving transportation safety. At the same time, the front axle cylinder 2 is independently controlled and does not participate in the cylinder adjustment under load conditions, reducing the usage frequency of the front axle cylinder 2, increasing the service life of the front axle cylinder 2, reducing the number of accumulators 1 required, and reducing production costs.

[0031] The accumulator valve block 4 is provided with an oil hole 5 that communicates with the rear axle cylinder 3. The number of oil holes 5 matches the number of rear axle cylinders 3. The oil holes 5 are connected to the oil chamber of the accumulator 1 through an oil inlet channel and an oil return channel. An adjustable damping block 6 is provided on the oil return channel. The adjustable damping block 6 can be replaced to achieve flow rate control of hydraulic oil in the oil circuit.

[0032] When the rear axle is multi-axle, the oil holes 5 and oil inlet and outlet channels of the accumulator valve block 4 are matched with the number of rear axle cylinders 3. It has a built-in replaceable adjustable damping block 6. Different adjustable damping blocks 6 have different oil hole sizes to control the oil flow speed. By limiting the oil speed, the speed of the oil when returning to the rear axle cylinder 3 can be controlled, which plays a buffering role and ensures driving comfort while ensuring smooth transportation.

[0033] A limit support 7 is provided on the axle near the bottom of the frame. A shock-absorbing pad 8 is provided between the limit support 7 and the frame. The shock-absorbing pad 8 is fixedly installed on the upper side of the limit support 7.

[0034] By setting up shock-absorbing pads 8 and limiting supports 7, when the compression of the rear axle cylinder 3 is large, the energy is absorbed by the compression deformation of the shock-absorbing pads 8, which prevents the telescopic rod in the rear axle cylinder 3 from hitting the cylinder barrel and causing damage and leakage to the cylinder, thereby reducing the failure rate of the rear axle cylinder 3 and improving its service life. Example

[0035] A limit support 7 is provided on the axle near the bottom of the frame, and a shock-absorbing pad 8 is provided between the limit support 7 and the frame. The shock-absorbing pad 8 is fixedly installed on the lower side of the frame. Example

[0036] A through hole is provided at the position corresponding to the oil chamber of the accumulator 1 on the side plate of the frame. The two accumulators 1 are connected to the oil chamber of the accumulator 1 through the through hole via a hydraulic pipeline.

[0037] To facilitate the connection of the two accumulators 1, and to facilitate the setting of the oil circuit and protect the safety of the oil circuit, the connection of the two accumulators 1 is set inside the frame instead of going around it, reducing the oil transmission stroke, so that the adjustment of the two sides can be made instantaneously, and the stability of the vehicle during driving is better.

[0038] The energy storage device 1 can be detachably mounted on the vehicle frame via a mounting base 9 that is fixedly connected to the side of the vehicle frame.

[0039] To facilitate the installation and disassembly of accumulator 1, as well as the assembly and disassembly of its piping, accumulator 1 is installed via mounting base 9, making subsequent maintenance more convenient and faster. This also ensures that accumulator 1 is installed more securely and can maintain good working condition even in complex environments.

[0040] The front axle cylinder 2 and the rear axle cylinder 3 are respectively hinged to the outer side of the frame and the corresponding axle end.

[0041] In order to achieve the vertical displacement of the axle, both the front axle cylinder 2 and the rear axle cylinder 3 can effectively buffer and dampen the shock, and the hinged ends can adapt to the complex and ever-changing cylinder movements.

[0042] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0043] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mining dump truck suspension arrangement, characterized by: The system includes a suspension cylinder assembly disposed between the vehicle frame and the axle, and a pair of accumulators (1) disposed on both sides of the frame. The suspension cylinder assembly includes a front axle cylinder (2) disposed between the front axle and the frame, and at least two pairs of rear axle cylinders (3) disposed between the rear axle and the frame. The number of rear axles corresponds to the number of rear axle cylinders (3). The rear axle cylinders (3) and the accumulators (1) disposed on the same side are connected to the oil chamber of the accumulators (1) through the accumulator valve block (4). The oil chambers of the accumulators (1) on both sides are connected through hydraulic lines.

2. A mining dump truck suspension structure according to claim 1, characterized in that: The accumulator valve block (4) is provided with an oil hole (5) that communicates with the rear axle cylinder (3). The number of oil holes (5) matches the number of rear axle cylinders (3). The oil hole (5) is connected to the oil chamber of the accumulator (1) through an oil inlet channel and an oil return channel. An adjustable damping block (6) is provided on the oil return channel. The adjustable damping block (6) can be replaced to achieve flow rate control of hydraulic oil in the oil circuit.

3. The mining dump truck suspension structure of claim 1, wherein: A limit support (7) is provided on the axle near the bottom of the frame. A shock-absorbing pad (8) is provided between the limit support (7) and the frame. The shock-absorbing pad (8) is fixedly installed on the upper side of the limit support (7).

4. The mining dump truck suspension structure of claim 1, wherein: A limiting support (7) is provided on the axle near the bottom of the frame. A shock-absorbing pad (8) is provided between the limiting support (7) and the frame. The shock-absorbing pad (8) is fixedly installed on the lower side of the frame.

5. The suspension structure for mining dump trucks according to claim 1, characterized in that: A through hole is provided at the position corresponding to the oil chamber of the accumulator (1) on the side plate of the frame. The hydraulic pipelines connecting the two accumulators (1) to the oil chamber of the accumulator (1) are connected through the through hole.

6. The suspension structure for mining dump trucks according to claim 1, characterized in that: The accumulator (1) is detachably mounted on the frame via a mounting base (9) that is fixedly connected to the side of the frame.

7. The suspension structure for mining dump trucks according to claim 1, characterized in that: The front axle cylinder (2) and the rear axle cylinder (3) are respectively hinged to the outer side of the frame and the corresponding axle end.

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