Brake and heat dissipation integrated structure of mining trackless rubber-tyred vehicle

Abstract

The invention discloses a mining trackless rubber-tyred vehicle brake and heat dissipation integrated structure which comprises a brake mechanism and a heat dissipation mechanism, the brake mechanism comprises a brake pedal, a hydraulic cylinder and a brake caliper, the pedal is communicated with one end of the hydraulic cylinder, and an inner pipeline of the brake caliper is communicated with the other end of the hydraulic cylinder; the heat dissipation mechanism comprises a cooling pump, a heat dissipation device, a valve and a circulating pipe, and the inner pipeline, the cooling pump, the heat dissipation device, the valve and the circulating pipe are sequentially communicated. A large amount of heat generated by braking can be rapidly taken away, too high oil temperature of hydraulic oil caused by heat accumulation is avoided, and the risk of heat fading is reduced fundamentally.

Description

Technical Field

[0001] This invention relates to the field of mining equipment, specifically to an integrated structure for braking and heat dissipation of a trackless rubber-tired mining vehicle. Background Technology

[0002] Trackless rubber-tired vehicles for mining are core equipment for material transportation and personnel transfer in underground coal mines. Their operating environment is characterized by four major features: long downhill slopes, high dust levels, high methane levels, and confined spaces. As a key factor in the safe operation of the vehicle, the braking system must simultaneously meet two core requirements: continuous braking load and efficient heat dissipation to prevent brake fade.

[0003] Chinese invention patent CN221138050U discloses a hydraulic braking system for an explosion-proof diesel engine trackless rubber-tired vehicle, comprising a master cylinder and a brake pedal. A hydraulic line is located at the right end of the master cylinder; a brake caliper is located at the lower end of the hydraulic line, and an internal pipe is located inside the brake caliper; brake discs are located on the left and right sides of the middle position inside the brake caliper; a cross-flow fan is located at the middle position of the upper end of the brake caliper, and an air duct is provided at the air outlet of the cross-flow fan, which is integrally formed with the brake caliper and located at the upper end between the two brake discs; a control switch is located on the left side outside the brake pedal.

[0004] The above-mentioned technologies have the following drawbacks: Although the above solutions adopt a dual cooling system of internal pipeline hydraulic oil cooling and cross-flow fan cooling, the hydraulic oil in the internal pipeline only relies on passive circulation during the braking of the trackless rubber-wheeled vehicle for heat dissipation. When the cross-flow fan is stopped, dust easily accumulates on the filter screen at the inlet of the cross-flow fan, resulting in reduced airflow and limited heat dissipation efficiency. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose an integrated structure for braking and heat dissipation of trackless rubber-tired mining vehicles, thereby solving the technical problem of low efficiency of passive circulation heat dissipation in the prior art.

[0006] To achieve the above-mentioned technical objectives, the present invention provides an integrated braking and heat dissipation structure for a trackless rubber-tired mining vehicle, comprising a braking mechanism, wherein the braking mechanism includes a brake pedal, a hydraulic cylinder, and a brake caliper, the pedal being connected to one end of the hydraulic cylinder, and the internal tubing of the brake caliper being connected to the other end of the hydraulic cylinder; and, The heat dissipation mechanism includes a cooling pump, a radiator, valves, and a circulation pipe, wherein the internal pipe, cooling pump, radiator, valves, and circulation pipe are connected in sequence.

[0007] In some embodiments, the brake caliper includes a caliper body and a disc body, the disc body being slidably connected to the caliper body, and the heat dissipation mechanism further includes an explosion-proof fan, the explosion-proof fan being mounted on the caliper body, and the outlet of the explosion-proof fan facing the disc body.

[0008] In some embodiments, the heat dissipation mechanism further includes a filter screen installed at the inlet of the explosion-proof fan.

[0009] In some embodiments, the heat dissipation mechanism further includes a cleaning component, which includes a guide fan and a brush. The guide fan is rotatably connected to the windward side of the filter screen, and the brush is fixedly connected to the guide fan. The brush is located on the leeward side of the filter screen and abuts against the filter screen.

[0010] In some embodiments, the heat dissipation mechanism further includes a collection component, which includes an external air inlet pipe, an internal air inlet pipe, and an adhesive layer. The external air inlet pipe is connected to the inlet of the explosion-proof fan, the internal air inlet pipe is threaded to the inside of the external air inlet pipe, and the adhesive layer is disposed inside the internal air inlet pipe. When the air guide fan rotates, it is used to throw dust onto the adhesive layer.

[0011] In some embodiments, the heat dissipation mechanism further includes a main exhaust pipe and exhaust branch pipes, the outlet of the explosion-proof fan is connected to the inlet of the main exhaust pipe, the outlet of the main exhaust pipe is connected to the inlet of each of the two exhaust branch pipes, and the outlets of the two exhaust branch pipes are respectively directed toward the radiator and the plate.

[0012] In some embodiments, the outlets of both exhaust branch pipes are radial.

[0013] In some embodiments, the heat dissipation mechanism further includes flow guide grooves, a plurality of flow guide grooves are arranged in a ring on the disk body, the flow guide grooves are located on the adjacent side of two disk bodies, and the flow guide grooves extend radially along the disk body.

[0014] In some embodiments, the heat dissipation mechanism further includes heat pipes, a plurality of heat pipes are arranged in a ring around the disk body, the heat pipes extend along the thickness direction of the disk body, the heat pipes are located on opposite sides of two disk bodies, the heat pipes and the guide grooves are arranged at intervals, the heat pipes include an evaporation section and a condensation section, the evaporation section is embedded in the disk body, and the condensation section extends out of the disk body.

[0015] In some embodiments, the condensation section is spiral-shaped.

[0016] Compared with the prior art, the beneficial effects of the present invention include: by replacing the traditional passive circulation with active circulation driven by a cooling pump, the flow rate of hydraulic oil through the radiator is increased, which can quickly remove a large amount of heat generated by braking, avoid the hydraulic oil temperature from being too high due to heat accumulation, and reduce the risk of heat fade from the root. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the integrated braking and heat dissipation structure provided by the present invention; Figure 2This is a cross-sectional view of the overall structure of the integrated braking and heat dissipation structure provided by the present invention; Figure 3 This is a cross-sectional view of the overall structure of the collection and cleaning components provided by the present invention; Figure 4 This is a cross-sectional view of the overall structure of the disk body provided by the present invention; Figure 5 This is a first-view overall structural diagram of the disk body provided by the present invention; Figure 6 This is a schematic diagram of the overall structure of the disk body provided by the present invention from a second perspective.

[0018] Explanation of reference numerals in the attached figures: 1. Braking mechanism; 11. Brake pedal; 12. Hydraulic cylinder; 13. Brake caliper; 131. Caliper body; 132. Disc body; 14. Internal piping; 2. Cooling mechanism; 21. Cooling pump; 22. Radiator; 23. Valve; 24. Circulation pipe; 25. Explosion-proof fan; 251. Filter screen; 26. Cleaning assembly; 261. Guide fan; 262. Brush; 27. Collection assembly; 271. External air inlet duct; 272. Internal air inlet duct; 273. Adhesive layer; 28. Main exhaust duct; 281. Branch exhaust duct; 282. Guide channel; 29. ​​Heat pipe; 291. Evaporation section; 292. Condensation section. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] This invention provides an integrated braking and heat dissipation structure for trackless rubber-tired mining vehicles, the structure of which is as follows: Figure 1 - Figure 6 As shown, it includes a braking mechanism 1 and a heat dissipation mechanism 2.

[0021] The braking mechanism 1 includes a brake pedal 11, a hydraulic cylinder 12, and a brake caliper 13. The pedal is connected to one end of the hydraulic cylinder 12, and the inner pipe 14 of the brake caliper 13 is connected to the other end of the hydraulic cylinder 12.

[0022] The heat dissipation mechanism 2 includes a cooling pump 21, a radiator 22, a valve 23, and a circulation pipe 24. The inner pipe 14, the cooling pump 21, the radiator 22, the valve 23, and the circulation pipe 24 are connected in sequence.

[0023] During use, when the driver presses the brake pedal 11, the brake pedal 11 drives the hydraulic cylinder 12 to generate high-pressure hydraulic oil. The high-pressure hydraulic oil is delivered through pipelines to the inner pipeline 14 of the brake caliper 13, pushing the brake components inside the brake caliper 13 to clamp the brake disc, thus achieving vehicle braking. During braking, the friction between the brake components and the brake disc generates a large amount of heat, which is transferred to the hydraulic oil in the inner pipeline 14, causing the hydraulic oil temperature to rise. The cooling mechanism 2 and the inner pipeline 14 of the braking mechanism 1 form a closed-loop circulation system. After the cooling pump 21 starts, it provides active power to drive the hydraulic oil that has absorbed the braking heat to flow out of the inner pipeline 14 of the brake caliper 13. After being pressurized by the cooling pump 21, it is delivered to the radiator 22. The radiator 22 exchanges heat with the airflow through the heat dissipation fins, quickly removing the heat from the hydraulic oil and achieving hydraulic oil cooling. After cooling, the hydraulic oil is regulated by valve 23 and then flows back to the inner pipeline 14 of the brake caliper 13 through the circulation pipe 24, completing one cooling cycle.

[0024] In this invention, the active circulation driven by the cooling pump 21 replaces the traditional passive circulation. The flow rate of hydraulic oil through the radiator 22 is increased, which can quickly remove a large amount of heat generated by braking, avoid the hydraulic oil temperature from being too high due to heat accumulation, and reduce the risk of heat fade from the source.

[0025] To further improve heat dissipation efficiency, please refer to... Figure 1 In a preferred embodiment, the brake caliper 13 includes a caliper body 131 and a disc body 132, the disc body 132 being slidably connected within the caliper body 131. The heat dissipation mechanism 2 further includes an explosion-proof fan 25, the explosion-proof fan 25 being mounted on the caliper body 131, and the outlet of the explosion-proof fan 25 facing the disc body 132.

[0026] During use, the explosion-proof fan 25 is fixedly installed on the side of the clamp body 131, with its air outlet oriented towards the contact area of ​​the slidingly connected disc body 132 and brake disc. It automatically starts when braking, generating a directional airflow to directly sweep the surface of the disc body 132 and the friction surface of the brake disc, quickly removing the surface heat accumulated on the disc body 132, preventing excessive heat transfer to the hydraulic oil, and assisting the liquid cooling system to reduce the heat dissipation load. At the same time, the airflow disturbs the air in the braking area, blowing away the coal dust attached to the surface of the disc body 132, brake disc and inner pipeline 14, preventing dust accumulation to form a heat insulation layer, and ensuring the friction efficiency between the disc body 132 and the brake disc and the heat exchange efficiency between the hydraulic oil and the inner pipeline 14.

[0027] To ensure the stable operation of the explosion-proof fan 25, please refer to... Figure 3 In a preferred embodiment, the heat dissipation mechanism 2 further includes a filter 251, which is installed at the inlet of the explosion-proof fan 25.

[0028] When in use, the filter screen 251 installed at the inlet of the explosion-proof fan 25 can effectively filter coal dust in the underground air, preventing dust from entering the fan and wearing the impeller and motor bearings, or being blown directly onto the disc body 132 and brake disc surface by the airflow to form a heat insulation layer, ensuring the long-term stable operation of the fan and the efficiency of air cooling.

[0029] To improve the cleanliness of filter 251, please refer to... Figure 3 In a preferred embodiment, the heat dissipation mechanism 2 further includes a cleaning component 26, which includes a guide fan 261 and a brush 262. The guide fan 261 is rotatably connected to the windward side of the filter screen 251, and the brush 262 is fixedly connected to the guide fan 261. The brush 262 is located on the leeward side of the filter screen 251 and abuts against the filter screen 251.

[0030] When in use, when the explosion-proof fan 25 is started, the airflow drives the guide fan 261 on the windward side of the filter screen 251 to rotate, and the fan synchronously drives the brush 262 fixed on it to rotate. The brush 262 is in close contact with the surface of the filter screen 251, and during the rotation, it wipes the leeward side of the filter screen 251 thoroughly, scraping away the dust trapped by the filter screen 251 and preventing dust from accumulating and clogging the pores of the filter screen 251.

[0031] To further improve the cleanliness of filter 251, please refer to... Figure 3 In a preferred embodiment, the heat dissipation mechanism 2 further includes a collection component 27, which includes an external air inlet pipe 271, an internal air inlet pipe 272, and an adhesive layer 273. The external air inlet pipe 271 is connected to the inlet of the explosion-proof fan 25, the internal air inlet pipe 272 is threaded to the inside of the external air inlet pipe 271, and the adhesive layer 273 is disposed inside the internal air inlet pipe 272. When the guide fan 261 rotates, it is used to throw dust onto the adhesive layer 273.

[0032] During use, the centrifugal force generated by the rotating airflow fan 261 throws away the scraped dust and some of the dust pre-adsorbed by the inner air inlet duct 272, preventing dust from accumulating around the filter screen 251. The dust thrown away by the centrifugal force, under the combined action of airflow guidance and centrifugal force, precisely adheres to the adhesion layer 273 inside the inner air inlet duct 272, achieving directional dust collection. The inner air inlet duct 272 and the outer air inlet duct 271 are connected by threads, and the inner air inlet duct 272 can be directly unscrewed later to clean or replace the adhesion layer 273, making the operation convenient and preventing secondary dust re-entrainment.

[0033] To simultaneously improve the heat dissipation efficiency of the heat sink 22 and the chassis 132, please refer to... Figure 2In a preferred embodiment, the heat dissipation mechanism 2 further includes an exhaust main pipe 28 and exhaust branch pipes 281. The outlet of the explosion-proof fan 25 is connected to the inlet of the exhaust main pipe 28, and the outlet of the exhaust main pipe 28 is connected to the inlet of the two exhaust branch pipes 281 respectively. The outlets of the two exhaust branch pipes 281 are respectively directed toward the radiator 22 and the plate 132.

[0034] During operation, the purified airflow enters the main exhaust pipe 28 through the outlet of the explosion-proof fan 25. From there, the airflow is branched into two branch exhaust pipes 281. The outlet of the first branch pipe faces the radiator 22, and the airflow directionally sweeps the surface of the radiator 22 fins, accelerating heat exchange between the fins and the air, thus assisting the liquid cooling system in rapidly reducing the hydraulic oil temperature. Simultaneously, the airflow removes any small amount of dust accumulated on the fin surface. The outlet of the second branch pipe faces the contact area between the disc 132 and the brake disc, and the airflow directly sweeps away the surface heat source, quickly carrying away the heat accumulated on the surface of the disc 132 and the brake disc, preventing excessive heat transfer to the hydraulic oil and reducing the load on the liquid cooling system. At the same time, the airflow disturbs the hot air in the braking area, accelerating overall heat dissipation.

[0035] To expand the airflow coverage area, please refer to Figure 2 In a preferred embodiment, the outlets of both exhaust branch pipes 281 are radial.

[0036] When in use, the radial airflow spreads out in a fan shape from the branch pipe outlet, increasing the coverage area and fully covering the surface of the disc 132, the friction area of ​​the brake disc, and the surrounding clamp 131 structure, eliminating the risk of residual heat accumulation at the edges.

[0037] To guide the airflow, please refer to Figure 5 In a preferred embodiment, the heat dissipation mechanism 2 further includes a flow guide groove 282, a plurality of flow guide grooves 282 are arranged around the disk body 132, the flow guide grooves 282 are located on the adjacent side of two disk bodies 132, and the flow guide grooves 282 extend radially along the disk body 132.

[0038] During use, on the one hand, the heat dissipation area of ​​the friction surface of the disc 132 is increased, shortening the heat conduction path from the friction surface to the disc 132 body, and accelerating the diffusion of surface heat to the edge of the disc 132; on the other hand, the guide groove 282 forms a radial airflow channel, which is precisely matched with the radial airflow of the exhaust branch pipe 281. After the radial airflow is blown into the space between the two discs 132, it flows rapidly along the radial extension direction of the guide groove 282, avoiding the formation of vortices in the friction surface. The speed of the airflow passing through the friction area is increased, and the accumulated surface heat is quickly carried away. In addition, during braking, the disc 132 rotates synchronously with the brake disc. The guide groove 282 uses the centrifugal force generated by the rotation to throw the dust generated by friction along the radial channel to the edge of the disc 132; at the same time, when the radial airflow flows along the guide groove 282, it forms an airflow drag force, which quickly carries the dust in the groove out of the friction area between the two discs 132, preventing dust from accumulating on the friction surface and forming a heat insulation layer.

[0039] To improve the heat dissipation efficiency of the 132 drive, please refer to... Figure 6 In a preferred embodiment, the heat dissipation mechanism 2 further includes heat pipes 29, a plurality of heat pipes 29 being arranged around the disk body 132, the heat pipes 29 extending along the thickness direction of the disk body 132, the heat pipes 29 being located on opposite sides of two disk bodies 132, the heat pipes 29 being arranged at intervals with the guide grooves 282, the heat pipes 29 including an evaporation section 291 and a condensation section 292, the evaporation section 291 being embedded in the disk body 132, and the condensation section 292 extending out of the disk body 132.

[0040] During operation, the evaporation section 291 of heat pipe 29 directly contacts the deep high-temperature area of ​​the plate 132, rapidly absorbing deep heat. The internal working fluid then vaporizes, utilizing the latent heat of phase change to quickly transfer the heat to the condensation section 292. The condensation section 292 of heat pipe 29 precisely connects with the split-flow radial air-cooling airflow. Part of the radial airflow from the exhaust branch pipe 281 sweeps the friction area of ​​the plate 132, while another part directly covers the condensation section 292 of heat pipe 29, accelerating heat dissipation and causing the working fluid to quickly condense and flow back to the evaporation section 291, forming a self-circulating system. The heat pipe 29 and the guide channel 282 are arranged alternately, avoiding mutual interference and forming a complementary heat conduction and dissipation mechanism: the guide channel 282 is responsible for surface heat conduction and airflow guidance, while the heat pipe 29 is responsible for deep heat extraction, resulting in a uniform overall temperature of the plate 132.

[0041] To accelerate the condensation rate of the working fluid in condensation section 292, please refer to... Figure 6 In a preferred embodiment, the condensation section 292 is spiral-shaped.

[0042] When in use, the spiral structure increases the effective heat dissipation area of ​​the condenser section 292 compared to the traditional straight rod shape, and significantly expands the contact area with the split-flow radial air-cooling airflow, thus accelerating the condensation speed of the working fluid.

[0043] To better understand this invention, the following is combined with... Figure 1 - Figure 6 The working principle of the integrated braking and heat dissipation structure for a trackless rubber-tired vehicle of the present invention is described in detail below: When the driver presses the brake pedal 11, the brake pedal 11 drives the hydraulic cylinder 12 to generate high-pressure hydraulic oil. The high-pressure hydraulic oil is transported through pipelines to the inner pipeline 14 of the brake caliper 13, pushing the braking components inside the brake caliper 13 to clamp the brake disc, thereby achieving vehicle braking. During the braking process, the friction between the braking components and the brake disc generates a large amount of heat, which is transferred to the hydraulic oil in the inner pipeline 14, causing the hydraulic oil temperature to rise. The heat dissipation mechanism 2 and the inner pipeline 14 of the braking mechanism 1 form a closed-loop circulation system. After the cooling pump 21 starts, it provides active power to drive the hydraulic oil that has absorbed the braking heat to flow out from the inner pipeline 14 of the brake caliper 13. After being pressurized by the cooling pump 21, it is transported to the radiator 22. The radiator 22 exchanges heat with the airflow through the heat dissipation fins, quickly removing the heat from the hydraulic oil and achieving hydraulic oil cooling. After the cooling hydraulic oil is regulated by the valve 23, it flows back to the inner pipeline 14 of the brake caliper 13 through the circulation pipe 24, completing one heat dissipation cycle.

[0044] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An integrated braking and heat dissipation structure for a trackless rubber-tired mining vehicle, characterized in that, include: A braking mechanism, comprising a brake pedal, a hydraulic cylinder, and a brake caliper, wherein the pedal is connected to one end of the hydraulic cylinder, and the internal tubing of the brake caliper is connected to the other end of the hydraulic cylinder; and, The heat dissipation mechanism includes a cooling pump, a radiator, valves, and a circulation pipe, wherein the internal pipe, cooling pump, radiator, valves, and circulation pipe are connected in sequence.

2. The integrated braking and heat dissipation structure for trackless rubber-tired mining vehicles according to claim 1, characterized in that, The brake caliper includes a caliper body and a disc body, the disc body being slidably connected to the caliper body. The heat dissipation mechanism also includes an explosion-proof fan, the explosion-proof fan being mounted on the caliper body, and the outlet of the explosion-proof fan facing the disc body.

3. The integrated braking and heat dissipation structure for trackless rubber-tired mining vehicles according to claim 2, characterized in that, The heat dissipation mechanism also includes a filter screen, which is installed at the inlet of the explosion-proof fan.

4. The integrated braking and heat dissipation structure for trackless rubber-tired mining vehicles according to claim 3, characterized in that, The heat dissipation mechanism also includes a cleaning component, which includes a guide fan and a brush. The guide fan is rotatably connected to the windward side of the filter screen, and the brush is fixedly connected to the guide fan. The brush is located on the leeward side of the filter screen and abuts against the filter screen.

5. The integrated braking and heat dissipation structure for trackless rubber-tired mining vehicles according to claim 4, characterized in that, The heat dissipation mechanism also includes a collection component, which includes an external air inlet pipe, an internal air inlet pipe, and an adhesive layer. The external air inlet pipe is connected to the inlet of the explosion-proof fan, the internal air inlet pipe is threaded to the inside of the external air inlet pipe, and the adhesive layer is located inside the internal air inlet pipe. When the air guide fan rotates, it is used to throw dust onto the adhesive layer.

6. The integrated braking and heat dissipation structure for trackless rubber-tired mining vehicles according to claim 2, characterized in that, The heat dissipation mechanism also includes a main exhaust pipe and exhaust branch pipes. The outlet of the explosion-proof fan is connected to the inlet of the main exhaust pipe. The outlet of the main exhaust pipe is connected to the inlet of each of the two exhaust branch pipes. The outlets of the two exhaust branch pipes are respectively directed toward the radiator and the plate.

7. The integrated braking and heat dissipation structure for trackless rubber-tired mining vehicles according to claim 6, characterized in that, The outlets of both exhaust branch pipes are radial.

8. The integrated braking and heat dissipation structure for trackless rubber-tired mining vehicles according to claim 2, characterized in that, The heat dissipation mechanism also includes flow guide grooves, and a plurality of flow guide grooves are arranged in a ring on the disk body. The flow guide grooves are located on the adjacent side of the two disk bodies and extend radially along the disk body.

9. The integrated braking and heat dissipation structure for trackless rubber-tired mining vehicles according to claim 8, characterized in that, The heat dissipation mechanism also includes heat pipes, a plurality of heat pipes are arranged in a ring on the plate body, the heat pipes extend along the thickness direction of the plate body, the heat pipes are located on two opposite sides of the plate body, the heat pipes and the guide grooves are arranged at intervals, the heat pipes include an evaporation section and a condensation section, the evaporation section is embedded in the plate body, and the condensation section extends out of the plate body.

10. The integrated braking and heat dissipation structure for trackless rubber-tired mining vehicles according to claim 9, characterized in that, The condensation section is spiral-shaped.

Images