Wet braking system for coal mine transportation equipment

Abstract

The utility model relates to the technical field of wet brakes, and discloses a wet brake system for coal mine transportation equipment, which comprises two groups of brake shells and a drive axle connected with the two groups of brake shells, external oil receiving pipes are arranged on adjacent sides of the two brake shells, and oil receiving ports and limiting grooves are arranged on the brake shells. The limiting groove is a U-shaped groove body, one end of the limiting groove is close to the oil receiving opening, the other end of the limiting groove is used for being connected with an external oil receiving pipe, and the external oil receiving pipe penetrates out of the limiting groove to be in butt joint with the oil receiving opening. A limiting assembly for preventing the external oil receiving pipe from falling off is arranged at an opening in the outer side of the limiting groove; according to the wet type braking device, by improving the fixing structure of the oil pipe and strengthening anti-shock protection, the anti-shock capacity of the wet type braking device is effectively improved, the wet type braking device can work stably in the high-shock and high-impact coal mine environment, the service life of the wet type braking device is prolonged, and the service life of the wet type braking device is prolonged. And the risk of equipment damage or shutdown caused by vibration is reduced.

Description

Technical Field

[0001] This utility model relates to the field of wet brake technology, and more specifically to a wet brake system for coal mine transportation equipment. Background Technology

[0002] In the coal mine transportation operation environment, wet braking devices play a key role in the safe braking of transportation equipment, but the connecting oil pipes, as the core part of the hydraulic transmission link, face many severe challenges in the existing technology.

[0003] Traditional methods of connecting hydraulic hoses to the brake housing are rudimentary, relying solely on simple fixing methods and lacking effective protective mechanisms designed for the harsh working conditions of coal mines. The hose connections frequently experience problems such as detachment, wear, or leakage due to external vibration, impact, or friction. Especially during the operation of coal mine transportation equipment, vibration and impact are unavoidable, making the hoses susceptible to loosening or rupture under such conditions, thus affecting the normal operation of the braking system. Hoses detachment or leakage not only lead to hydraulic system failure but may also cause equipment downtime, increase maintenance costs, and pose a potential threat to safety in coal mine operations.

[0004] Furthermore, due to the complex environment of coal mine transportation equipment, the equipment may encounter severe vibrations during operation, and existing braking systems have failed to effectively address the vibration resistance issue of the hydraulic pipes. If the hydraulic pipes are not effectively secured under vibration conditions, they may be dislodged or damaged, resulting in insufficient pressure in the hydraulic system, which in turn affects the braking effect and significantly reduces the safety and reliability of the transportation equipment.

[0005] Therefore, a wet braking system for coal mine transportation equipment is proposed. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a wet braking system for coal mine transportation equipment to solve the above-mentioned problems.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a wet braking system for coal mine transportation equipment, including two sets of brake housings and a drive axle connecting the two sets of brake housings. An external oil inlet pipe is provided on each adjacent side of the two brake housings. The brake housing is provided with an oil inlet and a limiting groove. The limiting groove is a U-shaped groove, with one end close to the oil inlet and the other end used to connect the external oil inlet pipe. The external oil inlet pipe passes through the limiting groove and connects with the oil inlet pipe. A limiting component is provided at the outer opening of the limiting groove to prevent the external oil inlet pipe from falling off. A sealing adapter is provided at the connection between the external oil inlet pipe and the oil inlet pipe.

[0008] Preferably, the width of the limiting groove is 1mm to 2mm larger than the outer diameter of the external oil pipe, and the depth is 3mm to 4mm larger than the outer diameter of the external oil pipe; the limiting component includes multiple sets of oppositely arranged elastic limiting plates, the elastic limiting plates are made of rubber material, one end of which is fixed to the opening edge of the limiting groove, and the other end extends toward the center of the groove and has a certain curvature.

[0009] Preferably, the elastic limiting piece has a threaded hole, and a fixing bolt that is threaded into the threaded hole is provided on the elastic limiting piece.

[0010] Preferably, the sealing adapter includes an inner sleeve that fits tightly with the external oil inlet pipe and an outer sleeve that connects to the oil inlet. A sealing ring is provided between the inner sleeve and the outer sleeve. The inner wall of the inner sleeve is provided with an internal thread along the axial direction. The connection end of the outer sleeve and the oil inlet is provided with an external thread and the threaded connection is coated with a sealing adhesive layer.

[0011] Preferably, the external oil pipe adopts a double-layer structure, with the inner layer being a high-pressure resistant rubber oil pipe and the outer layer being a metal braided sheath. A buffer layer is provided between the inner high-pressure resistant rubber oil pipe and the outer metal braided sheath. The buffer layer consists of multiple annular rubber spacers and polyurethane foam filling the spacers.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. Oil Pipe Connection Stability: A meticulously designed limiting groove and limiting assembly on the brake housing provide an extremely stable placement and fixation method for the external oil pipe. The specific dimensions of the limiting groove, with a width 1mm to 2mm larger than the outer diameter of the external oil pipe and a depth 3mm to 4mm greater, ensure smooth placement of the oil pipe while effectively restricting its movement range, reducing shaking and friction. The elastic limiting plate in the limiting assembly is made of rubber, and its unique curved shape tightly conforms to the external oil pipe. When the equipment vibrates or changes direction during operation, it generates an inward reaction force through elastic deformation, preventing the oil pipe from falling off. Furthermore, the threaded hole on the elastic limiting plate and the fixing bolt further reinforce the connection, ensuring that the external oil pipe maintains a stable connection in the complex and harsh coal mine transportation environment. This greatly reduces the risk of failure due to oil pipe displacement or detachment, ensuring the stable operation of the entire wet braking system.

[0014] 2. Highly efficient sealing and leak-proof performance: The structural design of the sealing adapter. The inner sleeve fits tightly with the outer oil inlet pipe, and the external threaded connection between the outer sleeve and the oil inlet port facilitates installation and disassembly while ensuring a secure connection. The sealing layer at the threaded connection effectively fills the gaps, preventing hydraulic oil leakage and impurity intrusion. The sealing ring between the inner and outer sleeves further strengthens the internal seal. This multi-seal design maintains excellent sealing performance in the harsh environment of underground coal mines, characterized by high temperature, high humidity, and the presence of corrosive substances. It prevents hydraulic oil leakage, ensures stable hydraulic system pressure, maintains the braking efficiency of the braking system, reduces the risk of brake failure due to hydraulic oil leakage, and improves the safety and reliability of equipment operation.

[0015] 3. Excellent Impact Resistance and Protection: The double-layer structure of the external oil pipe, combined with the buffer layer, exhibits strong impact resistance. The outer metal braided sheath, with its robust metal braid structure, effectively resists external forces such as wear and compression in coal mines, providing solid physical protection for the inner high-pressure resistant rubber oil pipe. The annular rubber spacer in the buffer layer undergoes elastic deformation first when subjected to external impact, absorbing part of the impact force. Even under conditions where transportation equipment frequently encounters vibration and impact, such as traveling in uneven roadways or loading and unloading goods, it can still ensure stable transmission of hydraulic oil, significantly extending the service life of the connecting oil pipe, reducing the frequency of equipment failures caused by oil pipe damage due to impact, and reducing equipment maintenance costs and downtime. Attached Figure Description

[0016] Figure 1 A three-dimensional schematic diagram of the wet braking device after installation.

[0017] Figure 2 A schematic diagram of a single wet braking device;

[0018] Figure 3 A schematic diagram showing a partial connection of the external oil inlet pipe on the brake housing mounted on the limiting groove;

[0019] Figure 4 A partial sectional view of the external oil inlet pipe installed at the oil inlet.

[0020] Figure 5 Top view of the upper limit groove on the brake housing;

[0021] Figure 6 This is a schematic diagram of the internal structure of the external oil connection pipe.

[0022] Legend:

[0023] 1. Brake housing; 2. Oil inlet; 3. Limiting groove; 301. Elastic limiting piece; 302. Fixing bolt; 4. External oil inlet pipe; 401. High-pressure resistant rubber oil pipe; 402. Metal braided sheath; 403. Annular rubber spacer; 404. Polyurethane foam; 501. Inner sleeve; 502. Outer sleeve; 503. Sealing ring; 504. Sealing adhesive layer; 6. Drive axle. Detailed Implementation

[0024] The present invention will be further described below with reference to specific embodiments. However, those skilled in the art should understand that the detailed description given here with reference to the accompanying drawings is for better explanation. The structure of the present invention may exceed the limited embodiments described herein. Some equivalent alternatives or common means will not be described in detail here, but they still fall within the protection scope of this application.

[0025] Figures 1-6 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figures 1-6 The present invention will be further described below.

[0026] A wet braking system for coal mine transportation equipment includes two sets of brake housings 1 and a drive axle 6 connecting the two sets of brake housings 1. External oil inlets 4 are provided on adjacent sides of each of the two brake housings 1. The connection relationship of the drive axles 6 between the two sets of brake housings 1 is existing known technology and will not be described in detail in the specification.

[0027] In this embodiment, the wet braking system for coal mine transportation equipment of the present invention features an innovative design for the protection of the connecting oil pipes. An oil inlet 2 and a limiting groove 3 are provided on the brake housing 1 near the wheel hub. The unique U-shaped structure of the limiting groove 3 provides a stable installation path for the external oil pipe 4. One end is close to the oil inlet 2 for easy connection of the external oil pipe 4, while the other end is used to connect the external oil pipe 4, ensuring an orderly arrangement of the external oil pipe 4 on the brake housing 1 and reducing the risk of wear and collision caused by disordered arrangement. The limiting groove 3 can constrain the movement range of the external oil pipe 4, reducing its swaying amplitude during equipment operation, thereby reducing the probability of friction with other components.

[0028] The limiting component at the outer opening of the limiting groove 3 effectively prevents the external oil connection pipe 4 from falling off. During operation of the coal mine transport equipment, regardless of severe vibration or sudden turning, the limiting component can firmly hold the external oil connection pipe 4, ensuring it remains within the limiting groove 3 and maintaining the integrity of the connection. The sealing adapter 5 at the connection point between the external oil connection pipe 4 and the oil inlet 2 ensures connection quality from multiple aspects. It not only prevents hydraulic oil leakage and avoids brake failure due to oil loss, but also enhances the stability of the connection, enabling it to withstand various external forces during transportation and ensuring the normal operation of the hydraulic system.

[0029] Specifically, the dimensions of the limiting groove 3 are precisely calculated. Its width is 1mm to 2mm larger than the outer diameter of the external oil pipe 4. This ensures that the external oil pipe 4 can be smoothly inserted into the groove, while also providing sufficient space to accommodate changes such as thermal expansion and contraction, preventing excessive compression from damaging the oil pipe. The depth is 3mm to 4mm larger than the outer diameter of the external oil pipe 4. Sufficient depth allows the external oil pipe 4 to be stably embedded, reducing the possibility of it being dislodged due to lateral forces.

[0030] The limiting component at the outer opening of the limiting groove 3 effectively prevents the external oil connection pipe 4 from falling off. During operation of the coal mine transport equipment, regardless of severe vibration or sudden turning, the limiting component can firmly hold the external oil connection pipe 4, ensuring it remains within the limiting groove 3 and maintaining the integrity of the connection. The sealing adapter 5 at the connection point between the external oil connection pipe 4 and the oil inlet 2 ensures connection quality from multiple aspects. It not only prevents hydraulic oil leakage and avoids brake failure due to oil loss, but also enhances the stability of the connection, enabling it to withstand various external forces during transportation and ensuring the normal operation of the hydraulic system.

[0031] Furthermore, the elastic limiting piece 301 in the limiting assembly is made of rubber, possessing good elasticity and flexibility. One end is fixed to the edge of the opening of the limiting groove 3, while the other end bends and extends towards the center of the groove. This shape allows the elastic limiting piece 301 to fit tightly against the external oil inlet pipe 4. When the external oil inlet pipe 4 tends to displace outward, the elastic limiting piece 301 undergoes elastic deformation, generating an inward reaction force to prevent it from falling off. Simultaneously, the rubber material prevents scratching the oil pipe.

[0032] Furthermore, a threaded hole is provided on the elastic limiting piece 301 in the limiting assembly. A fixing bolt 302 is provided on the elastic limiting piece 301 and threadedly connected to the inside of the threaded hole. By providing a threaded hole on the corresponding elastic limiting piece 301 and cooperating with the fixing bolt 302, the elastic limiting piece 301 that moves at the edge of the opening of the limiting groove 3 is reinforced. The oil pipe 4 is located outside the limiting groove 3.

[0033] In this embodiment, the inner sleeve 501 of the sealing adapter 5 fits tightly with the outer oil inlet pipe 4, and the outer sleeve 502 is connected to the oil inlet 2 via an external thread, which facilitates installation and disassembly and ensures a secure connection. The sealing adhesive layer 504 at the threaded connection fills the gap to prevent hydraulic oil leakage and impurity intrusion. The sealing ring 503 between the inner sleeve 501 and the outer sleeve 502 further ensures the internal seal, guaranteeing the sealing performance and stability of the connection.

[0034] In this implementation scheme, comprehensive protection of the connecting oil pipes effectively reduces braking system malfunctions caused by wear, corrosion, rupture, and hydraulic oil leakage of the external connecting oil pipe 4. For example, the double-layer structure of the connecting oil pipes, with its inner high-pressure resistant rubber hose 401, outer metal braided sheath 402, and buffer layer, collectively enhances the impact resistance of the connecting oil pipes. When subjected to external impact, the outer metal braided sheath 402 first absorbs part of the impact force, the buffer layer disperses and absorbs the impact force, and the inner high-pressure resistant rubber hose 401 continues to stably transmit hydraulic oil under protection, thereby preventing the connecting oil pipes from rupture or damage due to impact and ensuring the reliability of the wet braking system.

[0035] Specifically, the external oil pipe 4 adopts a double-layer structure. The inner high-pressure resistant rubber oil pipe 401 has excellent flexibility and high-pressure resistance, enabling stable delivery of hydraulic oil in high-pressure hydraulic environments and ensuring power transmission of the braking system. The outer metal braided sheath 402 provides strong physical protection for the inner layer. Its metal braided structure effectively resists external forces such as wear and compression, protecting the inner oil pipe from mechanical damage in the harsh environment of coal mines and extending the service life of the external oil pipe 4.

[0036] The buffer layer, located between the inner and outer layers, consists of an annular rubber spacer 403 and polyurethane foam 404. The annular rubber spacer 403, with a thickness of 4mm-6mm, undergoes elastic deformation upon impact, absorbing some of the impact force. The polyurethane foam 404, with a density of 30kg / m³-50kg / m³, further disperses and mitigates the remaining impact force, ensuring its uniform distribution and effectively protecting the inner high-pressure resistant rubber hose 401 from impact damage. This allows the outer hose 4 to maintain good performance under frequent vibration and impact conditions, guaranteeing the stable operation of the wet braking system.

[0037] The protective structure of the external oil connection pipe 4 of the wet braking system for coal mine transportation equipment consists of various components that work together to form a complete protective system. From the initial limiting and protection of the external oil connection pipe 4 by the limiting groove 3, to the limiting component preventing its detachment, to the sealing adapter 5 ensuring the sealing and stability of the connection, and the damage resistance protection of the double-layer structure and buffer layer of the connecting oil pipe itself, each link is closely connected to jointly cope with the harsh working environment in underground coal mines, ensuring that the connecting oil pipe of the wet braking system can operate stably and reliably, providing a more comprehensive and reliable guarantee for the safe operation of coal mine transportation equipment.

[0038] The working principle and usage process of this utility model are as follows: When the coal mine transportation equipment is started and running, the hydraulic oil is first transmitted through a pipe near the drive axle 6 to the external oil inlet pipe 4, and then flows from the external oil inlet pipe 4 into the oil inlet port 2, and enters the brake housing 1, where it is transmitted to the braking device. When the equipment needs to brake, the hydraulic oil, under the action of the hydraulic components inside the brake, controls the friction of the brake disc, thereby achieving the braking effect. In this process, the external oil inlet pipe 4 serves as the transmission channel for the hydraulic oil, and is tightly connected to the brake housing 1 through the oil inlet port 2 to ensure stable transmission of the hydraulic oil.

[0039] To prevent leakage or damage due to vibration, external impact, or friction during equipment operation, the external oil inlet pipe 4 is fixed within the limiting groove 3, and the limiting component ensures its stability and integrity during operation. Specifically, the width of the limiting groove 3 is 1mm to 2mm larger than the outer diameter of the external oil inlet pipe 4, and the depth is 3mm to 4mm larger than the outer diameter of the external oil inlet pipe 4, providing suitable placement space for the external oil inlet pipe 4, restricting its range of movement, reducing the amplitude of shaking, and reducing the probability of friction with other components. The limiting component at the outer opening of the limiting groove 3 further ensures the stability of the external oil inlet pipe 4. The elastic limiting piece 301 in the limiting component is made of rubber, with one end fixed to the edge of the opening of the limiting groove 3, and the other end bent and extended towards the center of the groove, tightly fitting the external oil inlet pipe 4. When the external oil inlet pipe 4 tends to displace outward, the elastic limiting piece 301 undergoes elastic deformation, generating an inward reaction force to prevent it from falling off, while the rubber material prevents scratching the oil pipe. Furthermore, by providing a threaded hole on the elastic limiting piece 301, and cooperating with the fixing bolt 302 threadedly connected inside the threaded hole, the elastic limiting piece 301, which moves at the edge of the opening of the limiting groove 3, is reinforced, ensuring that the external oil pipe 4 is always located within the limiting groove 3, thus maintaining the integrity of the connection.

[0040] Meanwhile, the sealing adapter 5 provides efficient sealing performance to prevent hydraulic oil leakage. The inner sleeve 501 of the sealing adapter 5 fits tightly with the outer oil inlet pipe 4, ensuring that hydraulic oil can smoothly and stably enter the inner high-pressure resistant rubber tubing 401 of the outer oil inlet pipe 4. The outer sleeve 502 is connected to the oil inlet 2 via external threads. During the connection process, the sealing rubber layer 504 at the threaded connection fills the thread gap to prevent hydraulic oil leakage and impurity intrusion. At the same time, the sealing ring 503 between the inner sleeve 501 and the outer sleeve 502 further ensures the internal seal, so that the hydraulic oil can be maintained in a sealed environment throughout the transmission process, and transmitted in the outer oil inlet pipe 4 with stable pressure and flow.

[0041] The external oil inlet pipe 4 adopts a double-layer structure. The inner high-pressure resistant rubber oil pipe 401, with its good flexibility and high-pressure resistance, stably transmits hydraulic oil to the hydraulic oil chamber inside the brake, thereby providing power to the brake piston and enabling the brake pads to achieve braking action according to the pressure changes of the hydraulic oil. In this process, the outer metal braided sheath 402 provides physical protection for the inner high-pressure resistant rubber oil pipe 401, resisting external forces such as wear and compression that may exist in the coal mine. When vibration and impact occur during the operation of the transportation equipment, such as when the vehicle travels on uneven roadways or when loading and unloading goods, the buffer layer plays a crucial role. The annular rubber spacer 403 in the buffer layer has a thickness of 4mm-6mm. It first undergoes elastic deformation to absorb part of the impact force. The polyurethane foam 404, with a density of 30kg / m³-50kg / m³, further disperses and mitigates the remaining impact force, evenly distributing the impact force over a larger area, effectively protecting the inner high-pressure resistant rubber oil pipe 401 from impact damage, ensuring stable transmission of hydraulic oil, and maintaining the normal operation of the braking system.

[0042] Throughout the entire operation, from the transmission of hydraulic oil to the realization of braking action, all components work closely together, and the various parts of the connecting oil pipe protection structure work in concert, effectively reducing braking system failures caused by problems such as wear, corrosion, rupture of external oil pipes, and hydraulic oil leakage. This ensures that the wet braking system can operate stably and reliably, providing a solid guarantee for the safe operation of coal mine transportation equipment.

[0043] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A wet braking system for coal mine transportation equipment, comprising two sets of brake housings (1) and a drive axle (6) connecting the two sets of brake housings (1), characterized in that: Both of the brake housings (1) are provided with external oil inlet pipes (4) on adjacent sides. The brake housing (1) is provided with an oil inlet (2) and a limiting groove (3). The limiting groove (3) is a U-shaped groove with one end close to the oil inlet (2) and the other end used to connect the external oil inlet pipe (4). The external oil inlet pipe (4) passes through the limiting groove (3) and connects with the oil inlet (2). A limiting component is provided at the outer opening of the limiting groove (3) to prevent the external oil inlet pipe (4) from falling off. A sealing adapter is provided at the connection between the external oil inlet pipe (4) and the oil inlet (2).

2. The wet braking system for coal mine transportation equipment according to claim 1, characterized in that: The width of the limiting groove (3) is 1 mm to 2 mm larger than the outer diameter of the external oil pipe (4), and the depth is 3 mm to 4 mm larger than the outer diameter of the external oil pipe (4). The limiting component includes multiple sets of oppositely arranged elastic limiting pieces (301). The elastic limiting pieces (301) are made of rubber material, with one end fixed to the opening edge of the limiting groove (3) and the other end extending toward the center of the groove with a certain curvature.

3. A wet braking system for coal mine transportation equipment according to claim 2, characterized in that: The elastic limiting piece (301) has a threaded hole, and a fixing bolt (302) is provided on the elastic limiting piece (301) and threadedly connected to the inside of the threaded hole.

4. A wet braking system for coal mine transportation equipment according to claim 1, characterized in that: The sealing adapter includes an inner sleeve (501) that fits tightly with the external oil inlet pipe (4) and an outer sleeve (502) that connects to the oil inlet (2). A sealing ring (503) is provided between the inner sleeve (501) and the outer sleeve (502). The inner wall of the inner sleeve (501) is provided with an internal thread along the axial direction. The connection end of the outer sleeve (502) and the oil inlet (2) is provided with an external thread and the threaded connection is coated with a sealing adhesive layer (504).

5. A wet braking system for coal mine transportation equipment according to claim 1, characterized in that: The external oil pipe (4) adopts a double-layer structure, with the inner layer being a high-pressure resistant rubber oil pipe (401) and the outer layer being a metal braided sheath (402). A buffer layer is provided between the inner high-pressure resistant rubber oil pipe (401) and the outer metal braided sheath (402). The buffer layer consists of multiple annular rubber spacers (403) and polyurethane foam (404) filled between the spacers.

Images