A waterproofing ingress protection device for a truck drive axle

Abstract

The utility model discloses a kind of truck drive axle waterproof penetration protection devices, it is related to vehicle drive axle protection technical field, comprising: water immersion sensor, gas cylinder, automatic control system and electric control gas valve;The water immersion sensor is set to the oil seal outside of drive axle housing by fixed seat;The gas cylinder is fixed on the longitudinal beam of truck frame, and is fixedly connected with the electric control gas valve by gas pipe;The electric control gas valve is fixed on the drive axle housing, and is fixedly connected with the air pipe of the drive axle housing;The automatic control system is fixed on truck frame, and is electrically connected with the water immersion sensor and the electric control gas valve.The utility model establishes stable positive pressure environment in the cavity of drive axle, forms dynamic sealing barrier at oil seal gap using gas pressure, and completely blocks the penetration path of sewage along axle gap.

Description

Technical Field

[0001] This utility model relates to the field of vehicle drive axle protection technology, and more specifically to a waterproof seepage protection device for truck drive axles. Background Technology

[0002] Currently, to meet environmental protection requirements and reduce pollution from construction vehicles on urban roads, dump trucks, mixer trucks, and other construction vehicles must pass through water troughs to wash off the mud and sand adhering to their tires before leaving the construction site. However, when vehicles pass through the water troughs, a large amount of wastewater can easily seep into the drive axle through the axle gaps. Once the lubricating oil in the drive axle mixes with the seeping wastewater, it will cause a significant decrease in the performance of the lubricating oil, resulting in poor lubrication of key components such as gears and bearings, and ultimately leading to drive axle failure, seriously threatening vehicle driving safety and service life.

[0003] However, current truck drive axles primarily rely on mechanical seals such as lip seals and O-rings for waterproofing. In specific operating conditions where engineering vehicles frequently wade through water (especially sewage containing mud and sand) for tire washing, these mechanical seals face severe challenges: erosion and wear from mud and sand easily lead to deformation and damage of the sealing lips, while the corrosive effects of sewage accelerate the aging of the sealing materials. These factors combined cause the waterproofing performance of traditional mechanical seals to rapidly decline, making it difficult to effectively prevent sewage from infiltrating the drive axle in the long term, and failing to fundamentally solve the oil-water mixing problem.

[0004] Therefore, how to ensure the safe operation and service life of the drive axle under the conditions of meeting environmental cleaning requirements and frequent water-related operations of engineering vehicles is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides a waterproof seepage protection device for truck drive axles, which overcomes the above-mentioned defects.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A waterproofing and seepage protection device for a truck drive axle includes: a water immersion sensor, an air reservoir, an automatic control system, and an electronically controlled air valve; the water immersion sensor is mounted on the outside of the oil seal of the drive axle housing via a mounting base; the air reservoir is fixed to the longitudinal beam of the truck frame and is fixedly connected to the electronically controlled air valve via an air pipe; the electronically controlled air valve is fixed to the drive axle housing and is fixedly connected to the air pipe of the drive axle housing; the automatic control system is fixed to the truck frame and is electrically connected to the water immersion sensor and the electronically controlled air valve.

[0008] Optionally, the gas storage cylinder has an aluminum alloy shell and an internal anti-corrosion coating.

[0009] Optionally, the electronically controlled air valve integrates an air inlet, an air outlet, and an air outlet; the air inlet is connected to the air storage cylinder via an air inlet pipe; the air outlet is connected to the exhaust pipe on the drive axle; in the normally closed state of the electronically controlled air valve, the air outlet and the air outlet are interconnected; in the normally closed state of the electronically controlled air valve, the air outlet and the air inlet are interconnected.

[0010] Optionally, when the electronically controlled air valve is open, the compressed gas in the storage cylinder is injected into the drive axle housing sequentially through the intake pipe, the electronically controlled air valve, and the exhaust pipe to form a positive pressure barrier.

[0011] Optionally, the automatic control system is implemented using a PLC chip. The L pin and L2 pin are both connected to the positive terminal of the 24V power supply; the M pin and M1 pin are both connected to the negative terminal of the 24V power supply; the input pin I0.0 is connected to one end of the normally open contact of the second relay; the other end of the normally open contact of the second relay is connected to the positive terminal of the 24V power supply; the output pin Q0.0 is connected to the positive terminal of the coil of the first relay; and the negative terminal of the coil of the first relay is connected to the negative terminal of the 24V power supply.

[0012] Optionally, the water immersion sensor is a liquid conductive sensor and is equipped with a corrosion-resistant stainless steel housing.

[0013] Optionally, the VCC pin of the water immersion sensor is connected to the positive terminal of the 24V power supply; the GND pin and COM pin of the water immersion sensor are both connected to the negative terminal of the 24V power supply; the NO pin of the water immersion sensor is connected to the negative terminal of the coil of the second relay; and the positive terminal of the coil of the second relay is connected to the positive terminal of the 24V power supply.

[0014] Optionally, the electrically controlled pneumatic valve is a pneumatic solenoid valve; the positive terminal of the pneumatic solenoid valve is connected to one end of the normally open contact of the first relay, and the negative terminal of the pneumatic solenoid valve is connected to the negative terminal of the 24V power supply; the other end of the normally open contact of the first relay is connected to the negative and positive terminals of the 24V power supply.

[0015] As can be seen from the above technical solution, this utility model discloses a waterproof seepage protection device for truck drive axles, which has the following advantages compared with the prior art:

[0016] 1. By establishing a stable positive pressure environment in the cavity of the drive axle, a dynamic sealing barrier is formed at the oil seal gap using gas pressure, which completely blocks the seepage path of sewage along the axle gap, fundamentally avoiding lubrication failure caused by the mixing of lubricating oil and sewage.

[0017] 2. The use of pneumatic sealing eliminates the need for mechanical contact, avoiding the problem of deformation and damage to the sealing lip caused by abrasion from mud and sand, corrosion and aging, thus improving service life. Attached Figure Description

[0018] 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.

[0019] Figure 1 A schematic diagram of the overall structure of this utility model;

[0020] Figure 2 A schematic diagram of the drive axle structure provided by this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the electrically controlled pneumatic valve provided by this utility model;

[0022] Figure 4 A schematic diagram of the port connections of the PLC chip provided by this utility model;

[0023] Figure 5 A schematic diagram of the circuit connection of the water immersion sensor, the first relay, and the second relay provided by this utility model;

[0024] In the diagram, 1 is the water immersion sensor; 2 is the air storage cylinder; 3 is the automatic control system; 4 is the electronically controlled air valve; 5 is the air pressure sensor; 6 is the drive axle housing; A is the air outlet; P is the air inlet; and R is the exhaust port. Detailed Implementation

[0025] 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.

[0026] This utility model discloses a waterproof seepage protection device for truck drive axles, such as... Figure 1 and Figure 2 As shown, it includes: a water immersion sensor 1, an air reservoir 2, an automatic control system 3, and an electronically controlled air valve 4; the water immersion sensor 1 is mounted on the outside of the oil seal of the drive axle housing 6 via a mounting base; the air reservoir 2 is fixed to the longitudinal beam of the truck frame and is fixedly connected to the electronically controlled air valve 4 via an air pipe; the electronically controlled air valve 4 is fixed to the drive axle housing 6 and is fixedly connected to the air pipe on the drive axle housing 6; the automatic control system 3 is fixed to the truck frame and is electrically connected to the water immersion sensor 1 and the electronically controlled air valve 4.

[0027] In one embodiment, the gas storage cylinder 2 is also equipped with a gas pressure sensor 5 for real-time monitoring of the gas pressure value in the gas storage cylinder 2.

[0028] In one embodiment, the gas storage cylinder 2 has an aluminum alloy shell and an anti-corrosion coating inside.

[0029] In one embodiment, such as Figure 3 As shown, the electronically controlled air valve 4 integrates an air inlet P, an air outlet R, and an air outlet A; the air inlet P is connected to the air storage cylinder 2 through an air inlet pipe; the air outlet A is connected to the exhaust pipe on the drive axle; in the normally closed state of the electronically controlled air valve 4, the air outlet A and the air outlet R are interconnected; in the working state of the electronically controlled air valve 4, the air outlet A and the air inlet P are interconnected.

[0030] In one embodiment, when the electronically controlled air valve 4 is open, the compressed gas in the storage cylinder 2 is injected into the drive axle housing 6 through the intake pipe, the electronically controlled air valve 4, and the exhaust pipe in sequence to form a positive pressure barrier.

[0031] In one embodiment, a pressure sensor 5 is also provided on the outside of the drive axle housing 6 to monitor the pressure value inside the drive axle housing 6 in real time and provide judgment data for stopping inflation.

[0032] In one embodiment, such as Figure 4 As shown, the automatic control system 3 is implemented using a PLC chip. The L pin and L2 pin are both connected to the positive terminal of the 24V power supply; the M pin and M1 pin are both connected to the negative terminal of the 24V power supply; the input pin I0.0 is connected to one end of the normally open contact of the second relay (KA2); the other end of the normally open contact of the second relay is connected to the positive terminal of the 24V power supply; the output pin Q0.0 is connected to the positive terminal A1 of the coil of the first relay (KA1); the negative terminal A2 of the coil of the first relay is connected to the negative terminal of the 24V power supply.

[0033] Furthermore, the PLC chip model is: S7-200 SMART CPU.

[0034] In one embodiment, the water immersion sensor 1 is a liquid conductive sensor and is provided with a corrosion-resistant stainless steel housing.

[0035] Furthermore, the water immersion sensor 1 adopts the HSM-WT202 liquid conductive sensor, which is equipped with a corrosion-resistant stainless steel housing and has an IP68 protection rating.

[0036] In one embodiment, such as Figure 5 As shown, the VCC pin of the water immersion sensor 1 is connected to the positive terminal of the 24V power supply; the GND pin and COM pin of the water immersion sensor 1 are both connected to the negative terminal of the 24V power supply; the NO pin of the water immersion sensor 1 is connected to the negative terminal A2 of the coil of the second relay; and the positive terminal A1 of the coil of the second relay is connected to the positive terminal of the 24V power supply.

[0037] In one embodiment, the electrically controlled pneumatic valve 4 (YV1) 4 is a pneumatic solenoid valve; the positive terminal A1 of the pneumatic solenoid valve is connected to one end of the normally open contact of the first relay, and the negative terminal A2 of the pneumatic solenoid valve is connected to the negative terminal of the 24V power supply; the other end of the normally open contact of the first relay is connected to the positive terminal of the 24V power supply.

[0038] Furthermore, the electronically controlled air valve 4 is a 24V pneumatic solenoid valve located at the end of the exhaust pipe above the drive axle housing 6. It is connected to the automatic control system 3 via a circuit and is responsible for opening / closing the air intake according to the signal.

[0039] Furthermore, the trachea is made of high-pressure nylon with a rated pressure of 10 bar.

[0040] In one embodiment, the control principle is as follows:

[0041] When water immersion sensor 1 detects water, its internal NO (normally open) contact closes, energizing the coil of relay KA2 (current path: 24V+ → KA2 coil → sensor NO contact → 0V). The energization of KA2's coil causes its normally open contact to close, thus energizing the PLC input pin I0.0 (current path: 24V+ → KA2 contact → I0.0). Upon recognizing the high-level signal of I0.0, the PLC controls its output pin Q0.0 to output a high level, driving the coil of relay KA1 to energize. After KA1's coil is energized, its normally open contact closes, forming a complete power supply circuit for the pneumatic valve YV1 (current path: 24V+ → KA1 contact → YV1 positive terminal → YV1 negative terminal → 0V), thereby opening the valve.

[0042] In one embodiment, the working principle of the truck drive axle waterproofing and seepage protection device is as follows:

[0043] A water immersion sensor 1, installed on the outside of the drive axle oil seal, monitors the surrounding water level in real time. When the water level exceeds a set threshold, the water immersion sensor 1 outputs a change signal to the automatic control system 3. Upon receiving the signal, the automatic control system 3 triggers the relay control board via the PLC microcontroller, which outputs an opening command to the electronically controlled air valve 4. The electronically controlled air valve 4 (24V pneumatic solenoid valve) opens the air intake channel, and compressed gas in the air reservoir 2 is injected into the drive axle housing 6 through a high-pressure nylon tube (rated pressure 10 bar) and a one-way valve. Continuous inflation creates a stable positive pressure of 0.2~0.4 bar inside the drive axle (higher than the external water pressure), forming an airtight barrier at the oil seal to prevent sewage from seeping in. The automatic control system 3 maintains the inflation duration (e.g., 30 seconds) through a timer to ensure that the positive pressure continuously covers the vehicle during wading. The air pressure sensor 5 monitors the water level in real time, and if the water level remains high, it cyclically activates the inflation process. When the water level drops to a safe value or the timer ends, the automatic control system 3 controls the electro-pneumatic valve 4 to switch to the exhaust port channel; excess gas in the drive axle cavity is quickly discharged through the exhaust port R to avoid internal pressure buildup affecting the lubrication system; the system is reset to standby state, completing one waterproof cycle.

[0044] 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 it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0045] 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 waterproof seepage protection device for truck drive axles, characterized in that, include: The system comprises a water immersion sensor (1), an air reservoir (2), an automatic control system (3), and an electronically controlled air valve (4). The water immersion sensor (1) is mounted on the outside of the oil seal of the drive axle housing (6) via a mounting base. The air reservoir (2) is fixed to the longitudinal beam of the truck frame and is fixedly connected to the electronically controlled air valve (4) via an air pipe. The electronically controlled air valve (4) is fixed to the drive axle housing (6) and is fixedly connected to the air pipe of the drive axle housing (6). The automatic control system (3) is fixed to the truck frame and is electrically connected to the water immersion sensor (1) and the electronically controlled air valve (4).

2. The truck drive axle waterproofing and seepage protection device according to claim 1, characterized in that, The gas storage cylinder (2) has an aluminum alloy shell and an anti-corrosion coating inside.

3. The truck drive axle waterproofing and seepage protection device according to claim 1, characterized in that, The electrically controlled air valve (4) integrates an air inlet (P), an air outlet (R), and an air outlet (A); the air inlet (P) is connected to the air storage cylinder (2) through an air inlet pipe; the air outlet (A) is connected to the exhaust pipe on the drive axle; in the normally closed state of the electrically controlled air valve (4), the air outlet (A) and the air outlet (R) are interconnected; in the normally closed state of the electrically controlled air valve (4), the air outlet (A) and the air inlet (P) are interconnected.

4. The truck drive axle waterproofing and seepage protection device according to claim 3, characterized in that, When the electronically controlled air valve (4) is open, the compressed gas in the air storage cylinder (2) is injected into the drive axle housing (6) through the air inlet pipe, the electronically controlled air valve (4), and the exhaust pipe in sequence to form a positive pressure barrier.

5. The truck drive axle waterproofing and seepage protection device according to claim 1, characterized in that, The automatic control system (3) is implemented using a PLC chip. The L pin and L2 pin are both connected to the positive terminal of the 24V power supply; the M pin and M1 pin are both connected to the negative terminal of the 24V power supply; the input pin I0.0 is connected to one end of the normally open contact of the second relay; the other end of the normally open contact of the second relay is connected to the positive terminal of the 24V power supply; the output pin Q0.0 is connected to the positive terminal of the coil of the first relay; the negative terminal of the coil of the first relay is connected to the negative terminal of the 24V power supply.

6. The truck drive axle waterproofing and seepage protection device according to claim 1, characterized in that, The water immersion sensor (1) is a liquid conductive sensor and is equipped with a corrosion-resistant stainless steel housing.

7. The truck drive axle waterproofing and seepage protection device according to claim 5, characterized in that, The VCC pin of the water immersion sensor (1) is connected to the positive terminal of the 24V power supply; the GND pin and COM pin of the water immersion sensor (1) are both connected to the negative terminal of the 24V power supply; the NO pin of the water immersion sensor (1) is connected to the negative terminal of the coil of the second relay; the positive terminal of the coil of the second relay is connected to the positive terminal of the 24V power supply.

8. The truck drive axle waterproofing and seepage protection device according to claim 5, characterized in that, The electrically controlled pneumatic valve (4) is a pneumatic solenoid valve; the positive terminal of the pneumatic solenoid valve is connected to one end of the normally open contact of the first relay, and the negative terminal of the pneumatic solenoid valve is connected to the negative terminal of the 24V power supply; the other end of the normally open contact of the first relay is connected to the negative and positive terminals of the 24V power supply.

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