Loader brake system and loader applying the same

Abstract

The utility model discloses a loader braking system and apply the system's loader, relate to loader technical field. Aims at solving the problem of traditional braking system control mode single, security redundancy is insufficient. The braking system includes air cylinder, proportional solenoid valve, gas brake valve, double -way check valve, relay valve, force pump and brake caliper, air cylinder gas outlet parallel proportional solenoid valve and gas brake valve, both through double -way check valve connection relay valve, relay valve intercommunication force pump and brake caliper. Optimal double -cavity air cylinder, double -line safety valve forms the independent control loop of front and rear axle, and is equipped with air pressure, pressure and oil pressure sensor. The system is compatible with manual brake and remote brake, can be adapted unmanned loader and remote control platform, and double -circuit design avoids single point failure and leads to brake failure, improves the work safety, is applicable to high -risk, harsh environment, and expands the loader application scene.

Description

Technical Field

[0001] This utility model belongs to the field of loader technology, specifically relating to a loader braking system and a loader using the system. Background Technology

[0002] Traditional loader braking systems generally employ a single control method involving manual operation of the air brake valve. The workflow is as follows: the driver depresses the air brake valve inside the cab, triggering the release of compressed air from the air reservoir. The compressed air then enters the booster pump via the air brake valve, pressurizing the brake fluid within the booster pump and delivering it to the brake calipers. Finally, braking is achieved through the contact between the friction pads and the brake disc. This system has shortcomings in practical applications: 1. Limited Control Mode: Traditional systems rely entirely on on-site driver operation and cannot be connected to remote control systems or unmanned operation platforms. In scenarios requiring remote monitoring, automatic obstacle avoidance, or unmanned operation, such as high-risk mines or work environments with severe dust pollution, traditional braking systems struggle to meet operational needs.

[0003] 2. Insufficient safety redundancy and risk of single point of failure: Most traditional systems adopt a single-loop air circuit design. If key components such as the air brake valve and the air outlet pipeline of the air tank fail, it will directly affect the braking effect or even lead to braking failure. Utility Model Content

[0004] To address the problems existing in the prior art, a loader braking system and a loader using the system are proposed.

[0005] The technical solution to the technical problem solved by this utility model is as follows: On the one hand, a loading mechanism braking system is proposed, including: an air tank; the air inlet of the air tank is connected to an air supply unit, and the air outlet is connected in parallel to a proportional solenoid valve and an air brake valve; a double-way check valve; one air inlet of the double-way check valve is connected to the air outlet of the proportional solenoid valve; the other air inlet of the double-way check valve is connected to the air outlet of the air brake valve; a relay valve; the control port of the relay valve is connected to the air outlet of the double-way check valve; the air inlet of the relay valve is connected to the air outlet of the air tank; the air outlet of the relay valve is connected to the air inlet of the booster pump; and a brake caliper; the brake caliper is connected to the oil outlet of the booster pump, and the brake fluid in the booster pump can enter the brake caliper under the pressure of compressed air to achieve braking.

[0006] Preferably, the air supply unit includes an air compressor, the air outlet of the air compressor is connected to the air inlet of the oil-water separator, the air outlet of the oil-water separator is connected to the air inlet of the safety valve, and the air outlet of the safety valve is connected to the air inlet of the air storage tank.

[0007] Preferably, the air reservoir is a dual-chamber air reservoir, with each chamber capable of independent air intake and exhaust. Each chamber's outlet is connected to a proportional solenoid valve and an air brake valve. Each set of proportional solenoid valves and air brake valves is connected to a two-way check valve. The corresponding booster pumps include a front booster pump and a rear booster pump, and the brake calipers include a front axle brake caliper and a rear axle brake caliper. The front booster pump and the rear booster pump are connected to the front axle brake caliper and the rear axle brake caliper, respectively. The relay valves include a front relay valve and a rear relay valve. The front booster pump is connected to the front relay valve and then to a two-way check valve, and the rear booster pump is connected to the rear relay valve and then to another two-way check valve.

[0008] Preferably, the safety valve is a dual-pipe safety valve, with its two outlets connected to the inlets of the two chambers of the air storage cylinder, respectively.

[0009] Preferably, the outlet of the dual-way one-way valve is equipped with a pressure sensor for detecting the air pressure entering the booster pump during braking.

[0010] Preferably, a pressure sensor is installed on the gas storage cylinder to detect the gas pressure in the gas storage cylinder.

[0011] Preferably, an oil pressure sensor is installed at the outlet of the booster pump to detect the oil pressure at the booster pump outlet.

[0012] On the other hand, a loader is proposed, including the braking system as described.

[0013] Compared with existing technologies, the above technical solution has the following advantages or beneficial effects: 1. This system connects a proportional solenoid valve and a traditional air brake valve in parallel at the air outlet of the air reservoir, and achieves compatibility between the two control signals through a two-way check valve. The driver can either manually brake by pressing the air brake valve or remotely brake by sending an electrical signal to the proportional solenoid valve via the remote control system to control the output and pressure of compressed air. This system eliminates the on-site operational limitations of traditional systems, is compatible with unmanned loaders and remote-controlled work platforms, and is suitable for high-risk and harsh environments, thus expanding the application scenarios of loaders.

[0014] 2. First, both the proportional solenoid valve and the pneumatic brake valve in this system can independently control the switching on and off of the braking system, ensuring that even if one of them fails, rendering the braking system unusable, the system will still function. Second, this system is equipped with a dual-chamber air reservoir, with each chamber having independent air inlet and outlet and corresponding to a set of control circuits for the proportional solenoid valve, pneumatic brake valve, two-way check valve, relay valve, booster pump, etc., controlling the front and rear brake calipers respectively. Simultaneously, the air supply unit uses a dual-pipeline safety valve connected to the dual-chamber air reservoir; if a single chamber or single circuit fails, the other circuit can continue to operate normally, preventing the entire braking system from failing. Attached Figure Description

[0015] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0016] Figure 1 This is a schematic diagram of the utility model.

[0017] Figure 2 This is a structural diagram of the utility model.

[0018] Explanation of reference numerals in the attached figures: 1. Air reservoir; 2. Proportional solenoid valve; 3. Two-way check valve; 4. Relay valve; 41. Front relay valve; 42. Rear relay valve; 5. Power booster pump; 51. Front power booster pump; 52. Rear power booster pump; 6. Air brake valve; 7. Air compressor; 8. Oil-water separator; 9. Safety valve; 10. Air pressure sensor; 11. Pressure sensor; 12. Oil pressure sensor; 13. Brake caliper; 131. Front axle brake caliper; 132. Rear axle brake caliper. Detailed Implementation

[0019] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and / or letters in different examples. This repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that the components illustrated in the drawings are not necessarily drawn to scale. The present invention omits descriptions of well-known components and processing techniques and processes to avoid unnecessarily limiting the present invention. The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] Example 1: Please see Figure 1 and Figure 2 In this embodiment, in order to facilitate the operation of the loader's braking system, a loader braking system is proposed, including: an air tank 1; the air inlet of the air tank 1 is connected to an air supply unit, and the air outlet is connected in parallel to a proportional solenoid valve 2 and an air brake valve 6. Dual-way check valve 3; the first air inlet of the dual-way check valve 3 is connected to the air outlet of the proportional solenoid valve 2; the second air inlet of the dual-way check valve 3 is connected to the air outlet of the pneumatic brake valve 6. Relay valve 4; the control port of relay valve 4 is connected to the outlet of the double-way check valve 3; the inlet of relay valve 4 is connected to the outlet of the air storage tank 1; the outlet of relay valve 4 is connected to the inlet of the booster pump 5. Brake caliper 13; Brake caliper 13 is connected to the oil outlet of booster pump 5, and the brake fluid in booster pump 5 can enter brake caliper 13 under the pressure of compressed air to achieve braking; The core logic of the loader's braking system is pneumatic-hydraulic braking, which uses the energy of compressed air to drive the hydraulic system for braking. The specific process is as follows: the air supply unit generates compressed air and stores it in the air reservoir 1; during braking, the compressed air can be output through two parallel paths: one controlled by a proportional solenoid valve 2 (electronic control), and the other by a pneumatic brake valve 6 (e.g., a foot brake pedal linkage valve); a two-way check valve 3 combines the compressed air from both paths and prevents mutual interference between the airflows; the combined compressed air enters the control port of the relay valve 4, triggering the relay valve 4 to quickly open its inlet, directly connecting it to the air reservoir 1, allowing the high-pressure air in the air reservoir 1 to directly enter the booster pump 5; the booster pump 5 converts pneumatic energy into hydraulic energy, pressurizing the internal brake fluid and delivering it to the brake caliper 13, where the brake caliper 13 piston extends to achieve friction braking between the brake pads and the brake disc or brake drum.

[0021] The proportional solenoid valve 2 and the air brake valve 6 are designed in parallel, which can realize dual protection of automatic braking such as auxiliary braking, emergency automatic braking and manual braking such as driver active braking. If one system fails, the other system can still work, which greatly improves braking safety and enables remote control.

[0022] Example 2: Continue reading Figures 1-2 Based on Embodiment 1, this embodiment further optimizes its air supply unit, which is the heart of the braking system's air source. It includes an air compressor 7, whose outlet is connected to the inlet of an oil-water separator 8. The outlet of the oil-water separator 8 is connected to the inlet of a safety valve 9, and the outlet of the safety valve 9 is connected to the inlet of an air reservoir 1. The specific process is as follows: the engine-driven air compressor 7 draws in outside air and compresses it into high-pressure air; the compressed air first enters the oil-water separator 8, where moisture, oil, and impurities are separated through filtration and condensation; the purified compressed air enters the safety valve 9, and when the air pressure exceeds a threshold, the safety valve 9 automatically releases pressure to prevent system overpressure; finally, the compressed air that meets the pressure and cleanliness requirements is stored in the air reservoir 1.

[0023] Example 3: Please see Figure 2In this embodiment, the air reservoir 1 is a dual-chamber air reservoir 1. Each chamber of the air reservoir 1 can independently receive and release air. Each chamber's outlet is connected to a proportional solenoid valve 2 and an air brake valve 6. Each set of proportional solenoid valves 2 and air brake valves 6 is connected to a double-way check valve 3. The corresponding booster pump 5 includes a front booster pump 51 and a rear booster pump 52. The brake caliper 13 includes a front axle brake caliper 131 and a rear axle brake caliper 132. The front booster pump 51 and the rear booster pump 52 are connected to the front axle brake caliper 131 and the rear axle brake caliper 132, respectively. The relay valve 4 includes a front relay valve 41 and a rear relay valve 42. The front booster pump 51 is connected to the front relay valve 41 and then to a double-way check valve 3. The rear booster pump 52 is connected to the rear relay valve 42 and then to another double-way check valve 3.

[0024] The dual-chamber air reservoir 1 consists of two independent chambers, a front chamber and a rear chamber, each with its own independent air intake and exhaust. The air outlet of the front chamber is connected to the front proportional solenoid valve 2 and the front air brake valve 6. The two are combined through a two-way one-way valve 3 and then connected to the front relay valve 41. The front relay valve 41 controls the front booster pump 51, which drives the front axle brake caliper 131. The rear chamber works similarly, controlling the rear axle brake caliper 132. This forms a completely independent dual-pipeline structure for the front and rear axle braking systems.

[0025] Advantages and benefits: Independent redundancy of front and rear axle braking: The dual-chamber air reservoir 1 and dual-pipeline design make the front and rear axle braking systems completely independent. If the front axle system fails, such as air leakage in the front chamber or failure of the front booster pump 51, the rear axle system can still work normally, and vice versa, avoiding the risk of brake failure of the entire vehicle.

[0026] Adapting to differences in front and rear axle loads: When the load on the front and rear axles changes dynamically during loader operation, such as when the load on the front axle increases suddenly when shoveling materials, the dual independent system can adjust the braking force of the front and rear axles separately through the proportional solenoid valve 2 to avoid braking deviation and improve braking stability.

[0027] Example 4: To ensure safety, the system is equipped with multiple pressure sensors 11. The air tank 1 is equipped with a pressure sensor 11 to detect the air pressure in the air tank 1. The outlets of the front and rear booster pumps 52 are respectively equipped with oil pressure sensors 12 to detect the oil pressure at the outlet of the booster pump 5. The outlet of the double-way check valve 3 is equipped with a pressure sensor 10 to detect the air pressure entering the booster pump 5 during braking.

[0028] Example 5: This embodiment proposes a loader that uses the braking system described in the above embodiment. The loader integrates the braking system described in the above embodiment. Braking is achieved by the piston squeezed by the brake caliper 13 of the braking system squeezing the brake pads. Its braking logic covers the entire process of air supply, air pressure regulation, gas-liquid conversion, braking execution, and status monitoring. It can adapt to complex working conditions such as heavy load, low speed operation, and high speed transfer of the loader.

[0029] By employing dual pneumatic and electric control, independent dual-system redundancy for the front and rear axles, and multi-stage monitoring, the loader can still brake stably under harsh working conditions such as heavy loads, bumps, and low temperatures, thus reducing the risk of operational accidents.

[0030] Although the specific embodiments of the utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the utility model. Based on the technical solution of the utility model, various modifications or variations that can be made by those skilled in the art without creative effort are still within the scope of protection of the utility model.

Claims

1. A loading mechanism braking system, characterized in that, include: Air storage tank (1); the air inlet of the air storage tank (1) is connected to the air supply unit, and the air outlet is connected in parallel to the proportional solenoid valve (2) and the air brake valve (6). A double-pass check valve (3); the air inlet of the double-pass check valve (3) is connected to the air outlet of the proportional solenoid valve (2); the air inlet of the double-pass check valve (3) is connected to the air outlet of the pneumatic brake valve (6); Relay valve (4); the control port of relay valve (4) is connected to the outlet of double-pass check valve (3); the inlet of relay valve (4) is connected to the outlet of air storage tank (1); the outlet of relay valve (4) is connected to the inlet of booster pump (5); Brake caliper (13); The brake caliper (13) is connected to the oil outlet of the booster pump (5), and the brake fluid in the booster pump (5) can enter the brake caliper (13) under the pressure of compressed air to achieve braking.

2. The loading mechanism braking system according to claim 1, characterized in that: The air supply unit includes an air compressor (7), the outlet of the air compressor (7) is connected to the inlet of the oil-water separator (8), the outlet of the oil-water separator (8) is connected to the inlet of the safety valve (9), and the outlet of the safety valve (9) is connected to the inlet of the air storage tank (1).

3. A loading mechanism braking system according to claim 2, characterized in that: The air reservoir (1) is a dual-chamber air reservoir (1). Each chamber of the air reservoir (1) can independently receive and release air. Each chamber's outlet is connected to a proportional solenoid valve (2) and an air brake valve (6). Each set of proportional solenoid valves (2) and air brake valves (6) is connected to a two-way check valve (3). The corresponding booster pump (5) includes a front booster pump (51) and a rear booster pump (52). The brake caliper (13) includes a front axle brake caliper (131) and a rear axle brake caliper (132). The rear axle brake caliper (132); the front booster pump (51) and the rear booster pump (52) are connected to the front axle brake caliper (131) and the rear axle brake caliper (132) respectively; the relay valve (4) includes the front relay valve (41) and the rear relay valve (42); the front booster pump (51) is connected to the front relay valve (41) and then connected to a double-pass check valve (3), and the rear booster pump (52) is connected to the rear relay valve (42) and then connected to another double-pass check valve (3).

4. A loading mechanism braking system according to claim 3, characterized in that: The safety valve (9) is a dual-pipe safety valve (9), and the two outlets of the dual-pipe safety valve (9) are respectively connected to the inlets of the two chambers of the air storage cylinder (1).

5. A loading mechanism braking system according to claim 3, characterized in that: The outlet of the double-pass check valve (3) is equipped with a pressure sensor (10) for detecting the air pressure entering the booster pump (5) during braking.

6. A loading mechanism braking system according to claim 3, characterized in that: A pressure sensor (11) is installed on the gas storage cylinder (1) to detect the gas pressure in the gas storage cylinder (1).

7. A loading mechanism braking system according to claim 3, characterized in that: An oil pressure sensor (12) is installed at the outlet of the booster pump (5) to detect the oil pressure at the outlet of the booster pump (5).

8. A loader, characterized in that: Includes the braking system as described in any one of claims 1-7.

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