Brake cooling control system and mobile working machinery

Abstract

The present invention relates to the technical field of vehicle brake control systems, and provides a brake cooling control system and a mobile working machine, which can be applied to fuel architectures and new energy architectures such as pure electric, extended-range electric, hybrid, fuel cell electric, and hydrogen engines. A liquid injection pump is used to spray coolant onto the brake; when the master brake pump performs a braking action, the master brake pump is used to provide driving gas to the liquid injection pump through a cooling switch in an open state, so that the liquid injection pump sprays coolant under the drive of the driving gas. The brake cooling control system in the present invention serves as a brake cooling system, and does not require manual control of the liquid injection pump to spray coolant. It can spray coolant for cooling as long as there is a braking action; in the process of driving with large braking force requirements and frequent braking times, it can effectively reduce the thermal temperature of the brake, improve the thermal efficiency of the brake, and reduce the safety risk of brake use.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle brake control systems, and in particular relates to a brake cooling control system and a mobile operating machine. Background Art

[0002] Most mobile operating machinery such as cranes use air brake systems, and the air brake systems are not equipped with cooling systems. At present, the axles of small and medium-tonnage wheeled cranes basically use drum brakes, and the axles of large-tonnage wheeled cranes basically use drum brakes and disc brakes. However, no matter drum brakes or disc brakes, there are no cooling measures, and brake air pipes, ABS and other sensor harnesses are arranged near the brakes.

[0003] During the operation and transfer process of mobile working machinery, especially when going down long slopes, it is necessary to brake for a long time. Due to the heavy weight of the mobile working machinery itself, the braking force required during braking is large, and the brake temperature of the air brake system rises rapidly. As the temperature rises, the brake material deforms thermally and the thermal efficiency decreases. At the same time, the excessively high temperature of the brake can easily cause nearby brake air pipes, ABS wiring harnesses, etc. to melt at high temperature, burn, and burn the vehicle. It can also easily lead to brake failure and safety accidents such as car accidents. According to the current development trend of mobile working machinery, the new energy architecture of mobile working machinery has reached a certain scale, so the optimization and improvement of this technical solution is suitable for new energy mobile working machinery and fuel mobile working machinery. Summary of the invention

[0004] The main purpose of the present invention is to provide a brake cooling control system and a mobile working machine, aiming to solve the technical problem of high safety risk when the brakes are frequently used in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a brake cooling control system for a mobile working machine, the brake cooling control system comprising: a coolant tank for containing coolant; a brake air circuit, comprising a brake and a brake master pump for supplying air to the brake; a liquid injection pump, connected to the coolant tank and arranged corresponding to the brake, the liquid injection pump being used to inject coolant to the brake; a cooling switch for being installed on a center console of a cab in the mobile working machine, when the brake master pump performs a braking action, the brake master pump is used to provide driving gas to the liquid injection pump through the cooling switch in an turned-on state, so that the liquid injection pump injects coolant under the drive of the driving gas, the liquid injection pump is a pneumatic water pump, the brake master pump is connected to the liquid injection pump through an air supply pipeline, and the cooling switch is an air-controlled switch and is arranged on the air supply pipeline.

[0006] In an embodiment of the present invention, a pressure limiting valve is further provided on the air supply pipeline, and the master brake cylinder is used to supply air to the liquid injection pump through the pressure limiting valve and the cooling switch in an open state.

[0007] In an embodiment of the present invention, the liquid injection pump includes: a pump housing, which is provided with a gas chamber and a liquid chamber isolated from each other, the gas chamber includes a pneumatic chamber and an air inlet channel and an air outlet respectively connected at both ends of the pneumatic chamber, the air inlet channel is connected to the air supply pipeline, and the air outlet is used to communicate with the outside atmosphere, the liquid chamber includes a gear chamber and a liquid inlet channel and an injection channel respectively connected at both ends of the gear chamber, the liquid inlet channel is connected to the coolant tank, and the injection port of the injection channel corresponds to the brake setting; a gear set is installed in the gear chamber, the meshing side of the gear set faces the liquid inlet channel, and the separation side of the gear set faces the injection channel, the gear set includes a driving wheel and a driven wheel meshing with the driving wheel; a pneumatic fan is installed in the pneumatic chamber, the driving wheel and the pneumatic fan are transmission-connected, and the pneumatic fan is used to drive the driving wheel to rotate under the drive of the master brake cylinder.

[0008] In an embodiment of the present invention, the pump housing includes: a main body cylinder, the pneumatic chamber and the gear chamber are both arranged in the main body cylinder; two docking cylinders, which are installed in the main body cylinder, and quick-insertion mechanisms are provided in the two docking cylinders, and the quick-insertion mechanisms are used for quick-insertion with the connecting pipe for sealing, and the connecting pipe is used to connect the air supply pipeline or the coolant tank.

[0009] In an embodiment of the present invention, the quick-insertion mechanism also includes: a double-layer nozzle, including an inner sleeve and an outer sleeve connected to the inner sleeve, the outer sleeve is arranged outside the inner sleeve, and the inner sleeve and the outer sleeve form a quick-insertion slot for the connecting pipe to extend into; a locking assembly, which is sleeved between the inner sleeve and the docking tube and is used to lock and seal the connecting pipe between the inner sleeve and the locking assembly.

[0010] In an embodiment of the present invention, the locking assembly includes: a locking clamp, which is provided with an undercut for clamping the connecting pipe; a locking plug, wherein the locking clamp is sealed between the locking plug and the outer sleeve along the axial direction of the inner sleeve, the outer wall of the locking plug is provided with an annular protrusion for locking with the docking tube, and the inner wall of the locking plug is provided with a sealing boss for locking the undercut.

[0011] In the embodiment of the present invention, the blocking boss is provided with a blocking inclined surface, and the locking clamp is provided with an outer inclined surface matching the blocking inclined surface.

[0012] In an embodiment of the present invention, the locking assembly further comprises a sealing ring disposed in the locking plug, and the sealing ring is sealed on a side of the locking plug away from the outer sleeve.

[0013] In an embodiment of the present invention, the two docking cylinders are respectively an air supply docking cylinder and a coolant docking cylinder, the pump housing also includes an injection cylinder, the injection channel is arranged in the injection cylinder, and the coolant docking cylinder and the injection cylinder are arranged opposite to each other along the radial direction of the main body cylinder.

[0014] In an embodiment of the present invention, the pneumatic fan and the driving wheel are coaxially threadedly connected via a driving shaft, and the driven wheel is installed on the pump housing via an optical axis.

[0015] In an embodiment of the present invention, a partition is detachably installed in the pump housing, the partition is located between the gear cavity and the pneumatic cavity, and the partition is provided with mounting holes for mounting the drive shaft and the optical axis.

[0016] The present invention also provides a mobile working machine, wherein the mobile working machine comprises the brake cooling control system as described above.

[0017] Through the above technical solution, the brake cooling control system provided by the embodiment of the present invention has the following beneficial effects:

[0018] When using the brake cooling control system, if the driver determines that the current driving state requires brake cooling without braking, the cooling switch can be turned on. When there is a braking action and the brake master pump of the brake air circuit supplies air to the brake, the brake master pump provides driving gas to the liquid injection pump through the cooling switch in the turned-on state, so that the liquid injection pump sprays coolant under the drive of the driving gas; or, when the brake master pump performs a braking action, the central controller of the center console sends a start electrical signal to the liquid injection pump through the cooling switch in the turned-on state, so that the liquid injection pump starts and sprays coolant. When the brake air circuit performs a braking action, the liquid injection pump can be automatically started through the brake master pump or the central controller, so that the liquid injection pump sprays coolant to the brake. When the cooling switch is in the turned-on state and there is no braking action, the liquid injection pump always remains closed. When the cooling switch is not turned on, the liquid injection pump always remains closed, which can avoid the waste of coolant caused by the accidental spraying of coolant. The brake cooling control system in the present invention serves as a brake cooling system. When a braking action is taken, there is no need to manually control the liquid injection pump to spray coolant. The coolant can be sprayed for cooling as long as there is a braking action. In the process of driving with large braking force demand and frequent braking times, the brake thermal temperature can be effectively reduced, the brake thermal efficiency can be improved, and the safety risk of brake use can be reduced. In addition, the brake cooling control system has a simple structure, is easy to operate, has low cost, and is easy to maintain.

[0019] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide an understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 is a schematic diagram of a cross-sectional structure of a liquid jet pump according to an embodiment of the present invention;

[0022] Figure 2 is a schematic diagram of another cross-sectional structure of a liquid jet pump according to an embodiment of the present invention;

[0023] Figure 3 is a schematic diagram of the cross-sectional structure of a docking tube of a liquid jet pump according to an embodiment of the present invention;

[0024] Figure 4 is a partial cross-sectional structural schematic diagram of a liquid jet pump according to an embodiment of the present invention;

[0025] Figure 5 is a schematic diagram of a pump housing of a liquid injection pump according to an embodiment of the present invention;

[0026] Figure 6 2 is a schematic diagram of the structure of a driving wheel and a pneumatic fan of a liquid jet pump according to an embodiment of the present invention;

[0027] Figure 7 is a schematic structural diagram of a driven wheel of a liquid injection pump according to an embodiment of the present invention;

[0028] Figure 8 2 is a schematic diagram of the structure of an anti-channeling spacer ring of a liquid injection pump according to an embodiment of the present invention;

[0029] Fig. 9 is a schematic diagram of a double-layer nozzle structure of a liquid injection pump according to an embodiment of the present invention;

[0030] Fig.10 is a schematic diagram of a locking collar structure of a liquid injection pump according to an embodiment of the present invention;

[0031] Fig.11 is a schematic diagram of a locking plug structure of a liquid injection pump according to an embodiment of the present invention;

[0032] Fig.12 is a schematic diagram of a partition structure of a liquid injection pump according to an embodiment of the present invention;

[0033] Fig.13 is a schematic diagram of a cover plate structure of a liquid injection pump according to an embodiment of the present invention;

[0034] Fig.14 is a schematic diagram of a brake cooling control system according to an embodiment of the present invention;

[0035] Fig.15 is a schematic diagram of a brake cooling control system according to another embodiment of the present invention.

[0036] Description of reference numerals:

[0037] 100. Liquid jet pump; 1. Pump housing; 11. Pneumatic chamber; 12. Gear chamber; 13. Air inlet channel; 14. Air outlet; 15. Liquid inlet channel; 16. Jet channel; 17. Main body tube; 18. Docking tube; 18a. Air supply docking tube; 18b. Coolant docking tube; 181. Locking groove; 182. Step groove; 19. Jet tube; 2. Gear set; 21. Driving wheel; 22. Driven wheel; 23. Driving shaft; 24. Optical axis; 25. Anti-channeling spacer ring; 3. Pneumatic fan; 4. Quick-insert mechanism; 41. Double-layer nozzle; 411. Inner sleeve; 412. Outer sleeve; 4121. Deformation hole; 4122. Limiting folding edge; 42. Locking clamp; 421. Undercut; 42 2. Outer bevel; 423. Limiting part; 424. Clamping part; 425. Deformation notch; 43. Locking plug; 431. Annular protrusion; 432. Sealing boss; 433. Sealing bevel; 44. Sealing ring; 5. Partition; 51. Connecting part; 52. Reinforcement part; 53. Mounting hole; 6. Cover plate; 61. Screw hole; 7. Connecting pipe; 20. Brake cooling control system; 201. Coolant tank; 202. Brake air circuit; 2021. Brake; 2022. Master brake cylinder; 2023. Foot relay valve; 2024. ABS solenoid valve; 2025. Brake air chamber; 203. Cooling switch; 204. Central controller; 205. Pressure limiting valve; 206. Air pressure sensor. DETAILED DESCRIPTION

[0038] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0039] The following describes a brake cooling control system according to the present invention with reference to the accompanying drawings.

[0040] like Fig.14 and Fig.15As shown, a brake cooling control system 20 is used for a mobile working machine. The brake cooling control system 20 includes a coolant tank 201, a brake air circuit 202, a liquid injection pump 100 and a cooling switch 203. The coolant tank 201 is used to contain coolant; the brake air circuit 202 includes a brake 2021 and a brake master pump 2022 for supplying air to the brake 2021; the liquid injection pump 100 is connected to the coolant tank 201 and is arranged corresponding to the brake 2021. The liquid injection pump 100 is used to inject coolant to the brake 2021; the cooling switch 203 , which is used to be installed on the center console of the cab in a mobile working machinery. When the master brake cylinder 2022 performs a braking action, the master brake cylinder 2022 is used to provide driving gas to the liquid injection pump 100 through the cooling switch 203 in the turned-on state, so that the liquid injection pump 100 injects coolant under the drive of the driving gas; or, when the master brake cylinder 2022 performs a braking action, the master brake cylinder 2022 is used to send a starting electrical signal to the liquid injection pump 100 through the cooling switch 203 in the turned-on state, so that the liquid injection pump 100 starts and injects coolant.

[0041] It can be understood that the brake air circuit 202 also includes a foot relay valve 2023, an ABS solenoid valve 2024, and a brake air chamber 2025, which are sequentially arranged between the brake master cylinder 2022 and the brake 2021. The brake cooling control system 20 is mainly used for cranes. The cooling switch 203 can be a manual switch, and the driver can manually turn on or off the cooling switch 203.

[0042] When using the brake cooling control system 20 in this embodiment, when the driver determines that the current driving state requires brake cooling without braking, the cooling switch 203 can be turned on. When there is a braking action, when the brake master pump 2022 of the brake air circuit 202 supplies air to the brake 2021, the brake master pump 2022 provides driving gas to the liquid injection pump 100 through the cooling switch 203 in the turned-on state, so that the liquid injection pump 100 sprays coolant under the drive of the driving gas; or, when the brake master pump 2022 performs a braking action, the central controller 204 of the center console sends a start electrical signal to the liquid injection pump 100 through the cooling switch 203 in the turned-on state, so that the liquid injection pump 100 starts and sprays coolant. The brake air circuit 202 can automatically start the liquid injection pump 100 through the brake master pump 2022 or the central controller 204 when performing a braking action, so that the liquid injection pump 100 sprays coolant to the brake 2021. When the cooling switch 203 is in the turned-on state and there is no braking action, the liquid injection pump 100 always remains closed. When the cooling switch 203 is not turned on, the liquid injection pump 100 is always kept closed, which can avoid the waste of coolant caused by the accidental injection of coolant. The brake cooling control system 20 in this embodiment is used as a brake cooling system. When a braking action is taken, there is no need to manually control the liquid injection pump 100 to spray coolant. The coolant can be sprayed for cooling as long as there is a braking action; in the process of driving with large braking force requirements and frequent braking times, the heat temperature of the brake 2021 can be effectively reduced, the thermal efficiency of the brake 2021 can be improved, and the safety risk of the use of the brake 2021 can be reduced. In addition, the brake cooling control system 20 has a simple structure, is easy to operate, has low cost, and is easy to maintain.

[0043] like Fig.14 As shown, in one embodiment, the liquid injection pump 100 is a pneumatic water pump, the brake master pump 2022 is connected to the liquid injection pump 100 through an air supply pipeline, the cooling switch 203 is an air-controlled switch and is arranged on the air supply pipeline, and a pressure limiting valve 205 is also arranged on the air supply pipeline. The pressure limiting valve 205 can be located between the cooling switch 203 and the liquid injection pump 100, and the brake master pump 2022 is used to supply air to the liquid injection pump 100 when the cooling switch 203 is turned on.

[0044] In this embodiment, the brake cooling control system 20 is based on the brake air circuit 202, and a set of air supply pipelines with a pressure limiting function are added. The air supply pipeline is connected to the control port of the brake master pump 2022 and before the air inlet of the foot relay valve 2023. Since the pumping power of the liquid injection pump 100 comes from the air in the brake air circuit 202, the pressure limiting valve 205 is added to the air supply pipeline to limit the intake pressure of the liquid injection pump 100 to avoid excessive cooling liquid injection rate.

[0045] In the case of no braking, the driver can turn on the cooling switch 203 according to the actual driving situation, so that the cooling switch 203 opens the air supply pipeline, and steps on the brake pedal. The gas from the brake master pump 2022 passes through the pressure limiting valve 205 and enters the air inlet of the liquid injection pump 100. The gas is used as a power source. Through the internal structure of the liquid injection pump 100, the coolant in the coolant tank is pumped out, and the coolant is sprayed to the brake 2021 for cooling. Closing the cooling switch 203 can block the air supply pipeline. In this embodiment, the gas in the brake air circuit 202 is used as power. The power source is environmentally friendly and belongs to a new energy type design. As a brake cooling system, it has not been used on cranes at present. In the driving process of cranes with large braking force requirements and frequent braking times, the thermal temperature of the brake 2021 can be reduced and the thermal efficiency of the brake 221 can be improved. The system structure is simple, easy to operate, low cost, and easy to maintain.

[0046] like Fig.15 As shown, in another embodiment, the liquid injection pump 100 is an electric water pump, and the cooling switch 203 is an electrically controlled switch for connecting to a central controller 204 of a center console. The cooling switch 203 is electrically connected to the liquid injection pump 100. The brake cooling control system 20 also includes an air pressure sensor 206 for detecting the air pressure of the brake air circuit 202. The air pressure sensor 206 and the cooling switch 203 are electrically connected to the central controller 204. The central controller 204 is used to send a start electrical signal to the liquid injection pump 100 through the cooling switch 203 in an open state according to the air pressure signal of the air pressure sensor 206.

[0047] The central controller 204 is connected to a cooling switch 203. When the driver manually brakes for a long time and needs to assist cooling of the brake 2021, the cooling switch 203 is turned on, and an air pressure sensor 206 is installed between the foot relay valve 2023 and the ABS solenoid valve 2024. When braking, the control port of the foot relay valve 2023 is filled with air into the ABS solenoid valve 2024. At this time, the air pressure sensor 206 transmits the air pressure signal to the central controller 204 of the central console according to the air pressure change. After processing, the central controller 204 transmits the start electrical signal to the liquid injection pump 100. The liquid injection pump 100 works to pump out the coolant in the coolant tank 201 to spray and cool the brake 2021. When the braking action stops, the air pressure sensor senses the air pressure change and stops outputting the air pressure signal. The central controller 204 stops outputting the start electrical signal, the liquid injection pump 100 stops working, and the coolant stops spraying. There is no need to manually control the water pump to spray water. Water spray cooling can be performed as long as there is a braking action.

[0048] like Figures 1 to 13As shown, in an embodiment of the present invention, a liquid injection pump 100 includes a pump housing 1, a gear set 2 and a pneumatic fan 3. The pump housing 1 is provided with a gas chamber and a liquid chamber isolated from each other. The gas chamber includes a pneumatic chamber 11 and an air inlet channel 13 and an air outlet 14 respectively connected at both ends of the pneumatic chamber 11. The air inlet channel 13 is connected to an air supply pipeline, and the air outlet 14 is used to communicate with the outside atmosphere. The liquid chamber includes a gear chamber 12 and a liquid inlet channel 15 and an injection channel 16 respectively connected at both ends of the gear chamber 12. The liquid inlet channel 15 and the cooling liquid Box 201 is connected, and the injection port of the injection channel 16 is used to set the target injection area corresponding to the brake 2021; the gear group 2 is installed in the gear cavity 12, the meshing side of the gear group 2 faces the liquid inlet channel 15, and the separation side of the gear group 2 faces the injection channel 16, and the gear group 2 includes a driving wheel 21 and a driven wheel 22 meshing with the driving wheel 21; the pneumatic fan 3 is installed in the pneumatic cavity 11, the driving wheel 21 and the pneumatic fan 3 are connected in transmission, and the pneumatic fan 3 is used to drive the driving wheel 21 to rotate under the drive of the master brake cylinder 2022.

[0049] Specifically, the air outlet of the pressure limiting valve 205 is connected to the air inlet channel 13 of the liquid injection pump 100 , the liquid injection pump 100 is fixed on the axle near the brake 2021 , the liquid inlet of the liquid inlet channel 15 is connected to the coolant tank 201 , and the injection port is aligned with the brake 2021 .

[0050] It can be understood that the liquid jet pump 100 in this embodiment is mainly used for spraying glass water, the air supply pipeline can provide high-pressure gas, the water source can be a water tank of a mobile working machine, the air intake channel 13 can be connected to the brake master cylinder 2022 through the connecting pipe 7, and the liquid inlet channel 15 can be connected to the water source through the connecting pipe 7. The air intake channel 13, the liquid inlet channel 15, and the jet channel 16 in this embodiment are all long strip channels, wherein the cross-sectional size of the jet channel 16 is smaller than the cross-sectional size of the liquid inlet channel 15, which can increase the spray pressure of the liquid jet pump 100.

[0051] The gas chamber and the liquid chamber in this embodiment are isolated from each other to achieve water and gas separation. The airflow can flow out from the air outlet 14 after passing through the pneumatic chamber 11 from the inlet of the air inlet channel 13, blowing the blades of the pneumatic fan 3 in the pneumatic chamber 11 to rotate counterclockwise, so that the pneumatic fan 3 drives the driving wheel 21 to rotate, and the gear rotation drives the driven wheel 22 to rotate clockwise. When the gear set 2 performs rotation transmission, the disengaged side of the gear set 2 disengages from the meshing, the volume becomes larger, and the pressure in the chamber is lower, so that the liquid in the coolant tank 201 is sucked into the liquid inlet channel 15 through the liquid inlet of the liquid inlet channel 15, and gradually fills the gear chamber 12, and then the liquid follows the rotation of the gear set 2 to reach the injection channel 16, the meshing side of the gear set 2 re-engages, and the volume space becomes smaller. Since the clearance of the gear meshing is very tight, the liquid can overcome its own resistance and flow to the injection channel 16, forming a high-pressure liquid flow, and finally sprayed out from the injection port of the injection channel 16. The power source of the liquid jet pump 100 in this embodiment is gas, which conforms to the design concept of new energy products and is clean and environmentally friendly. It can also omit the control switch, wiring harness and other configurations of the electric motor in the prior art, which can reduce manufacturing cost investment and later pollutant emissions. At the same time, the liquid jet pump 100 can automatically adjust the amount of water sprayed and the duration of time by the ventilation volume, air flow speed and ventilation time without the need for electronic control. In addition, the liquid jet pump 100 is a water pump structure that is not integrated in the water tank, is small in size, does not need to occupy a large space, and has a wider range of applications.

[0052] like Figure 5 As shown, the pump housing 1 includes a main body tube 17 and two docking tubes 18, and the pneumatic chamber 11 and the gear chamber 12 are both arranged in the main body tube 17; the two docking tubes 18 are installed in the main body tube 17, and the two docking tubes 18 are both provided with a quick plug mechanism 4, and the quick plug mechanism 4 is used for sealing and quick plugging with the connecting pipe 7, and the connecting pipe 7 is used to connect the brake master cylinder 2022 or the coolant tank 201. In this embodiment, the main body tube 17 and the two docking tubes 18 are hollow cylindrical tubes, which have a simple structure and edge matching. By integrating the two docking tubes 18 into the main body tube 17, the compactness of the structure of the pump housing 1 can be improved. The two docking tubes 18 are connected to the outer wall of the main body tube 17. By arranging the quick plug mechanism 4 in the two docking tubes 18, the pipeline connection can be facilitated. After the connecting pipe 7 is inserted into the quick plug mechanism 4, the pipeline is sealed and fixed, so that the gas / liquid can enter smoothly and be sealed. The liquid injection pump 100 uses a pipeline quick plug design, which is convenient for disassembly and assembly of the pipeline and convenient for maintenance.

[0053] In one embodiment, the quick-insertion mechanism 4 also includes a double-layer nozzle 41 and a locking assembly. The double-layer nozzle 41 includes an inner sleeve 411 and an outer sleeve 412 connected to the inner sleeve 411. The outer sleeve 412 is arranged outside the inner sleeve 411. The inner sleeve 411 and the outer sleeve 412 form a quick-insertion slot for the connecting pipe 7 to extend into; the locking assembly is sleeved between the inner sleeve 411 and the docking tube 18 and is used to lock and seal the connecting pipe 7 between the inner sleeve 411 and the locking assembly.

[0054] like Fig. 9 As shown, the edge of the outer sleeve 412 in this embodiment is provided with a limited folding edge 4122, and the interior of the docking tube 18 can be provided with a stepped groove 182 matching the limited folding edge 4122, which can limit the limited folding edge 4122. The outer sleeve 412 can also be provided with a long strip-shaped deformation hole 4121, which can facilitate the double-layer nozzle 41 to be installed in the docking tube 18. In this embodiment, a double-layer nozzle 41 is provided, and a quick slot is provided between the inner sleeve 411 and the outer sleeve 412, which can facilitate the positioning and block insertion of the connecting pipe 7. The length of the outer sleeve 412 is less than the length of the inner sleeve 411, and the length of the inner sleeve 411 is set corresponding to the length of the docking tube. The outer end of the inner sleeve 411 is recessed in the outer edge of the docking tube and is arranged close to the outer edge of the docking tube. The locking assembly can lock the connecting tube 7, and the locking assembly is sleeved between the docking tube 18 and the inner sleeve 411, and the right end of the locking assembly abuts against the outer sleeve 412, which can facilitate the installation of the locking assembly.

[0055] like Figures 9 to 11 As shown, the locking assembly includes a locking ring 42 and a locking plug 43. The locking ring 42 is provided with a buckle 421 for clamping the connecting tube 7. The locking ring 42 is sealed between the locking plug 43 and the outer sleeve 412 along the axial direction of the inner sleeve 411. The outer wall of the locking plug 43 is provided with an annular protrusion 431 for locking with the docking tube 18, and the inner wall of the locking plug 43 is provided with a sealing boss 432 for locking the buckle 421.

[0056] In this embodiment, the locking clamp 42 may include a limiting portion 423 and a clamping portion 424 connected to the limiting portion 423. The clamping portion 424 is provided with a deformation notch 425, which is a small open ring. The limiting portion 423 is a large limiting ring. The cross-sectional size of the limiting portion 423 is larger than the cross-sectional size of the clamping portion 424. The clamping portion 424 can extend into the locking plug 43. The end portions of the limiting portion 423 and the locking plug 43 are limitedly abutted. The undercut 421 is arranged on the inner wall of the clamping portion 424. The sealing boss 432 can limit the undercut 421. By performing multi-directional limiting on the limiting portion 423 and the undercut 421, the tightness of the fitting between the locking clamp 42 and the locking plug 43 can be improved.

[0057] The locking clamp 42 is provided with an undercut 421, which can prevent the connecting pipe 7 from detaching from the docking tube 18. The annular protrusion 431 is arranged on the outer wall of the locking plug 43. The docking tube 18 is provided with a locking groove 181 which cooperates with the annular protrusion 431. In order to facilitate the annular protrusion 431 to extend into the docking tube 18, a guide part is provided at the right end of the annular protrusion 431.

[0058] Specifically, the blocking boss 432 is provided with a blocking slope 433, and the locking collar 42 is provided with an outer slope 422 matching the blocking slope 433; and the locking assembly further includes a sealing ring 44 arranged in the locking plug 43, and the sealing ring 44 is sealed on the side of the locking plug 43 away from the outer sleeve 412. The blocking boss 432 in this embodiment is wedge-shaped and provided with a blocking slope 433, and the outer surface of the clamping portion 424 is an outer slope 422, and the outer slope 422 matches the blocking slope 433, which can ensure that there is a sufficient limiting area between the locking collar 42 and the locking plug 43, thereby ensuring the connection stability of the quick plug mechanism 4. The sealing ring 44 is an O-type sealing ring, which is arranged at one end of the quick plug mechanism 4 away from the outer sleeve 412, and can make the connecting pipe 7 and the inner sleeve 411 seal and match.

[0059] like Figures 1 to 5 As shown, the two docking tubes 18 are respectively an air supply docking tube 18a and a cooling liquid docking tube 18b, and the pump housing 1 also includes an injection tube 19, the injection channel 16 is arranged in the injection tube 19, and the cooling liquid docking tube 18b and the injection tube 19 are arranged opposite to each other along the radial direction of the main body tube 17. Figure 2 As shown, the cooling liquid docking tube 18b and the injection tube 19 in this embodiment are arranged in a colinear manner, which can ensure that the liquid in the cooling liquid docking tube 18b can smoothly enter the injection tube 19, and the air supply docking tube 18a can be perpendicular to the cooling liquid docking tube 18b. By forming an angle with each other, the compactness of the structure of the liquid injection pump 100 can be improved and miniaturization can be achieved. The cross-sectional size of the injection tube 19 is smaller than the cross-sectional size of the cooling liquid docking tube 18b, which can further reduce the volume of the liquid injection pump 100.

[0060] like Figures 6 to 8 As shown, the pneumatic fan 3 and the driving wheel 21 are coaxially threadedly connected through the driving shaft 23, and the driven wheel 22 is installed on the pump housing 1 through the optical axis 24. A threaded section is provided at one end of the driving shaft 23 and is threadedly connected to the pneumatic fan 3. The driving wheel 21 and the pneumatic fan 3 are coaxially designed with thread locking. The rotation of the pneumatic fan 3 directly drives the driving wheel 21 to rotate. The driven wheel 22 is installed on the pump housing 1 through the optical axis 24 and meshes with the driving wheel 21. The transmission structure between the pneumatic fan 3 and the gear set 2 is simple, easy to assemble and has a low production cost.

[0061] In the embodiment of the present invention, a partition plate 5 is detachably installed in the pump housing 1, and the partition plate 5 is located between the gear chamber 12 and the pneumatic chamber 11. The partition plate 5 is provided with a mounting hole 53 for mounting the drive shaft 23 and the optical axis 24. Fig.12 and Fig.13As shown, the partition plate 5 in this embodiment includes a reinforcement portion 52 and a connecting portion 51 connected to the outer edge of the reinforcement portion 52. The reinforcement portion 52 in this embodiment is a double-layer plate structure with a thickness greater than that of the connecting portion 51. The connecting portion 51 and the pump housing 1 can be detachably connected by screws or bolts, and the mounting holes 53 are all opened in the reinforcement portion 52 to ensure the mounting strength. The detachable partition plate 5 can facilitate the inspection and maintenance between the pneumatic fan 3 and the gear set 2.

[0062] The drive shaft 23 and the optical axis 24 are both sleeved with anti-slip spacer rings 25, which can be U-shaped spacer rings. The anti-slip spacer rings 25 can be set at the connection between the drive shaft 23, the optical axis 24 and the partition 5 and the pump housing 1 to prevent the drive shaft 23 and the optical axis 24 from slipping. The liquid jet pump 100 also includes a cover plate 6 with a screw hole 61, and the cover plate 6 can be detachably connected to the main body tube 17 through the screw hole 61, which can prevent other components from entering the main body tube 17 and interfering with the pneumatic fan 3.

[0063] The present invention also provides a mobile working machine, which includes a cab and the brake cooling control system 20 as described above. The specific structure of the brake cooling control system 20 refers to the above embodiment. Since the mobile working machine adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. In one embodiment, the mobile working machine can be applied to a crane. It should be emphasized that the mobile working machine is suitable for fuel vehicles and new energy vehicles.

[0064] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0065] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0067] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A brake cooling control system for a mobile working machine, characterized in that: The brake cooling control system (20) comprises: A coolant tank (201), used for containing coolant; A brake air circuit (202), comprising a brake (2021) and a brake master cylinder (222) for supplying air to the brake (2021); a liquid injection pump (100) connected to the coolant tank (201) and arranged corresponding to the brake (2021), the liquid injection pump (100) being used to inject coolant onto the brake (2021); A cooling switch (203) is used to be installed on a central console of a cab in the mobile working machine. When the brake master cylinder (2022) performs a braking action, the brake master cylinder (222) is used to provide driving gas to the liquid injection pump (100) through the cooling switch (203) in an on state, so that the liquid injection pump (100) injects cooling liquid under the drive of the driving gas; The liquid injection pump (100) is a pneumatic water pump, the brake master cylinder (2022) is connected to the liquid injection pump (100) via an air supply pipeline, and the cooling switch (203) is a pneumatically controlled switch and is arranged on the air supply pipeline; The liquid injection pump (100) comprises a pump housing (1), wherein the pump housing (1) comprises: Main body tube (17); Two docking tubes (18) are mounted on the main tube (17), and quick-insertion mechanisms (4) are provided in the two docking tubes (18). The quick-insertion mechanisms (4) are used for quick-insertion with the connecting tube (7) in a sealed manner, and the connecting tube (7) is used for connecting the air supply pipeline or the coolant tank (201); The quick-insertion mechanism (4) further comprises: a double-layer nozzle (41), comprising an inner sleeve (411) and an outer sleeve (412) connected to the inner sleeve (411), the outer sleeve (412) being arranged outside the inner sleeve (411), the inner sleeve (411) and the outer sleeve (412) forming a quick-insertion slot for the connecting pipe (7) to extend into; A locking assembly, sleeved between the inner sleeve (411) and the docking tube (18) and used to lock and seal the connecting tube (7) between the inner sleeve (411) and the locking assembly; The locking assembly comprises: Locking snap ring (42); A locking plug (43), wherein the locking collar (42) is sealed between the locking plug (43) and the outer sleeve (412) along the axial direction of the inner sleeve (411), the inner wall of the locking plug (43) is provided with a sealing boss (432), the sealing boss (432) is provided with a sealing inclined surface (433), and the locking collar (42) is provided with an outer inclined surface (422) matching the sealing inclined surface (433).

2. The brake cooling control system according to claim 1, characterized in that: A pressure limiting valve (205) is also provided on the air supply pipeline, and the brake master cylinder (2022) is used to supply air to the liquid injection pump (100) through the pressure limiting valve (205) and the cooling switch (203) in an open state.

3. The brake cooling control system according to claim 1, characterized in that: The pump housing (1) is provided with a gas chamber and a liquid chamber isolated from each other, the gas chamber comprising a pneumatic chamber (11) and an air inlet channel (13) and an air outlet (14) respectively connected at both ends of the pneumatic chamber (11), the air inlet channel (13) being connected to the air supply pipeline, the air outlet (14) being used to be connected to the outside atmosphere, the liquid chamber comprising a gear chamber (12) and a liquid inlet channel (15) and an injection channel (16) respectively connected at both ends of the gear chamber (12), the liquid inlet channel (15) being connected to a coolant tank (201), and the injection port of the injection channel (16) being arranged corresponding to the brake (2021); The liquid injection pump (100) comprises: A gear set (2) is mounted in the gear chamber (12), the meshing side of the gear set (2) faces the liquid inlet channel (15), and the disengaging side of the gear set (2) faces the injection channel (16), and the gear set (2) comprises a driving wheel (21) and a driven wheel (22) meshing with the driving wheel (21); A pneumatic fan (3) is installed in the pneumatic chamber (11), the driving wheel (21) and the pneumatic fan (3) are transmission-connected, and the pneumatic fan (3) is used to drive the driving wheel (21) to rotate under the gas drive of the brake master cylinder (2022).

4. The brake cooling control system according to claim 3, characterized in that: The pneumatic chamber (11) and the gear chamber (12) are both arranged in the main body tube (17).

5. The brake cooling control system according to any one of claims 1 to 4, characterized in that: The locking clamp (42) is provided with an undercut (421) for clamping the connecting pipe (7); the outer wall of the locking plug (43) is provided with an annular protrusion (431) for locking with the docking tube (18); and the inner wall of the locking plug (43) is provided with a blocking boss (432) for locking the undercut (421).

6. The brake cooling control system according to any one of claims 1 to 4, characterized in that: The locking assembly further comprises a sealing ring (44) disposed in the locking plug (43), wherein the sealing ring (44) seals on a side of the locking plug (43) away from the outer sleeve (412).

7. The brake cooling control system according to claim 3 or 4, characterized in that: The two docking cylinders (18) are respectively an air supply docking cylinder (18a) and a coolant docking cylinder (18b); the pump housing (1) further comprises an injection cylinder (19); the injection channel (16) is arranged on the injection cylinder (19); and the coolant docking cylinder (18b) and the injection cylinder (19) are arranged opposite to each other along the radial direction of the main cylinder (17).

8. The brake cooling control system according to claim 3 or 4, characterized in that: The pneumatic fan (3) and the driving wheel (21) are coaxially threadedly connected via a driving shaft (23), and the driven wheel (22) is mounted on the pump housing (1) via an optical axis (24).

9. The brake cooling control system according to claim 8, characterized in that: A partition plate (5) is detachably mounted in the pump housing (1); the partition plate (5) is located between the gear chamber (12) and the pneumatic chamber (11); and the partition plate (5) is provided with a mounting hole (53) for mounting the drive shaft (23) and the optical shaft (24).

10. A mobile working machine, characterized in that: The mobile working machine comprises a brake cooling control system (20) according to any one of claims 1 to 9.

Images