Hybrid service braking system with front wet-type axle and rear dry-type axle and loader
By adopting a hybrid driving braking system with front wet bridge and rear dry bridge on the loader, combined with air top oil and hydraulic brake units, the problems of easy damage and complex assembly of the front axle are solved, and higher braking reliability and production efficiency are achieved.
Patent Information
- Application Number
- CN202422368633.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-27
AI Technical Summary
When traditional loaders choose the same type of front and rear drive axle, the front axle is prone to damage, the braking performance is degraded, and the dual wet bridge is complex in configuration and high in cost, and the dual dry bridge assembly efficiency is low.
It adopts a hybrid driving braking system with front wet axle rear dry axle, combined with air-top oil and hydraulic braking units to achieve reliable braking of the front axle and simple assembly of the rear axle.
It improves the braking reliability of the front axle, reduces the cost and assembly difficulty of the whole machine, and improves production efficiency.
Smart Images
Figure CN223058977U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a hybrid service braking system for a front wet axle and a rear dry axle and a loader, belonging to the technical field of hybrid service braking. Background Art
[0002] When traditional loaders select front and rear drive axles, they often choose the same type of drive axle (hereinafter referred to as axle), such as both wet axles or dry axles.
[0003] The normal operating conditions of loaders are as follows:
[0004] 1. During the loading and unloading process of the bucket, the boom and bucket need to be repeatedly lifted. The front axle bears a greater load during the loading process.
[0005] 2. The bucket needs to be shoveled into materials frequently. The materials (sand, iron filings, accumulated water) contacted by the front axle, and the dry axle caliper disc brakes are exposed outside, making them more vulnerable to contamination, resulting in a decline in the braking performance of the caliper brake discs.
[0006] Combined with the above-mentioned operating conditions of loaders, problems such as damage to the caliper brake discs and brake failure often occur in dry front axles. Therefore, many loaders use a double wet axle configuration for the front and rear axles. However, the overall cost of wet axles is higher than that of dry axles, and when the rear axle is a wet axle, auxiliary installation components such as additional bushings, front and rear supports, etc. are generally required. Therefore, the assembly of the rear wet axle is more complex and the assembly efficiency is lower. Content of the Utility Model
[0007] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a hybrid service braking system for a loader with a front wet axle and a rear dry axle and a loader. The front axle is a wet axle and the rear axle is a dry axle, which ensures better braking reliability requirements for the front axle while reducing the assembly difficulty, improving the production efficiency, and reducing the overall machine cost.
[0008] To achieve the above purpose, the utility model is implemented by the following technical solutions:
[0009] On the one hand, the utility model provides a hybrid service braking system for a front wet axle and a rear dry axle, including an air compression device, a control valve group, a gas storage device, and a service air brake valve connected in sequence. The service air brake valve is connected to a brake pedal device and a brake assembly, and the brake pedal device is connected to the brake assembly;
[0010] The brake assembly includes two combinations. Among them, the first combination is a dry axle air over oil braking unit and a wet axle air over oil braking unit, and the second combination is a dry axle air over oil braking unit and a wet axle hydraulic braking unit;
[0011] In the first combination, stepping on the brake pedal device can control the pressure of the gaseous medium of the service air brake valve, and apply the pressure of the gaseous medium to the dry bridge air over oil brake unit and the wet bridge air over oil brake unit to realize the braking of the front wet bridge and the rear dry bridge.
[0012] In the second combination, stepping on the brake pedal device can respectively control the pressure of the gaseous medium and the pressure of the liquid medium, and apply the pressure of the gaseous medium and the pressure of the liquid medium to the dry bridge air over oil brake unit and the wet bridge hydraulic brake unit respectively to realize the braking of the front wet bridge and the rear dry bridge.
[0013] Optionally, the dry bridge air over oil brake unit includes a dry bridge booster device, a dry bridge three-way block, a shunt joint and a dry bridge caliper disc brake that are bidirectionally connected in sequence, and the dry bridge booster device is bidirectionally connected with the service air brake valve.
[0014] Optionally, the connecting pipeline inside the dry bridge air over oil brake unit is a gas medium pipeline.
[0015] Optionally, the wet bridge air over oil brake unit includes a wet bridge booster device, a wet bridge three-way block and a wet bridge brake that are bidirectionally connected in sequence.
[0016] Optionally, the connecting pipeline inside the wet bridge air over oil brake unit is a liquid medium pipeline.
[0017] Optionally, the wet bridge hydraulic brake unit includes a liquid medium pump, and the liquid medium pump is respectively connected with a safety device, a liquid medium filling device and a service liquid medium brake valve. The liquid medium filling device is respectively connected with the safety device and a liquid medium energy storage device. The safety device is connected with a liquid medium tank. The liquid medium tank is connected with the liquid medium pump. The liquid medium energy storage device is connected with the service liquid medium brake valve. The service liquid medium brake valve is respectively connected with the brake pedal device and a wet bridge three-way block. The wet bridge three-way block is connected with a wet bridge brake. The wet bridge brake is connected with the liquid medium tank.
[0018] Optionally, the connecting pipeline inside the wet bridge hydraulic brake unit is a liquid medium pipeline.
[0019] Optionally, the control valve group includes a pressure control valve, a check valve and an oil-water separator, and the pressure control valve, the check valve and the oil-water separator are connected in series in sequence or integrated with each other.
[0020] Optionally, the air compression device, the control valve group, the gas storage device and the service air brake valve are all unidirectionally connected through a gas medium pipeline.
[0021] On the other hand, the present invention also provides a wheel loader, which includes the hybrid service braking system of the front wet bridge and the rear dry bridge described in any one of the above.
[0022] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows:
[0023] The front axle of the present utility model adopts a wet axle, and the rear axle adopts a dry axle. There are two braking schemes for it. One is that both the front and rear axles adopt air-over-oil braking. The second is that the front wet axle adopts hydraulic braking type, and the rear dry axle adopts air-over-oil braking type. Compared with the braking type of double dry axles, it more meets the working conditions requirements of the loader, further ensures the braking reliability of the front axle. Compared with the braking type of double wet axles, it can greatly reduce the cost of the drive system, reduce the assembly difficulty, and greatly improve the production efficiency. Description of the Drawings
[0024] Figure 1 It is a combined schematic diagram of the dry axle air-over-oil braking unit and the wet axle air-over-oil braking unit of the hybrid service braking system of the front wet axle and rear dry axle in an embodiment of the present utility model;
[0025] Figure 2 It is a connection structure schematic diagram of the dry axle air-over-oil braking unit and the wet axle air-over-oil braking unit of the hybrid service braking system of the front wet axle and rear dry axle in an embodiment of the present utility model;
[0026] Figure 3 It is a combined schematic diagram of the dry axle air-over-oil braking unit and the wet axle hydraulic braking unit of the hybrid service braking system of the front wet axle and rear dry axle in an embodiment of the present utility model;
[0027] Figure 4 It is a connection structure schematic diagram of the dry axle air-over-oil braking unit and the wet axle hydraulic braking unit of the hybrid service braking system of the front wet axle and rear dry axle in an embodiment of the present utility model;
[0028] In the figure: 100 air compression device, 200 control valve group, 211 pressure control valve, 212 one-way valve, 213 oil-water separator, 300 gas storage device, 400 service air brake valve, 500 dry axle air-over-oil braking unit, 510 dry axle booster device, 520 dry bridge three-way block, 530 shunt joint, 540 dry axle caliper disc brake, 600 wet axle air-over-oil braking unit, 610 wet axle booster device, 620 wet bridge three-way block, 630 wet bridge brake, 700 wet axle hydraulic braking unit, 710 liquid medium pump, 720 liquid medium filling device, 730 liquid medium energy storage device, 740 safety device, 750 liquid medium tank, 760 service liquid medium brake valve, 800 brake pedal device, 1000 gas medium pipeline, 2000 liquid medium pipeline. Detailed Embodiments
[0029] The following further describes the present utility model in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present utility model, and cannot be used to limit the protection scope of the present utility model. Embodiment 1
[0030] As Figure 1 and Figure 2 shown, the embodiment of the present utility model provides a hybrid service braking system with a front wet axle and a rear dry axle, including an air compression device 100, a control valve group 200, a gas storage device 300, and a service air brake valve 400 that are sequentially and unidirectionally connected through a gas medium pipeline 1000.
[0031] The air compression device 100 is used to provide compressed gas with a preset pressure. The control valve group 200 is used to control the direction and pressure of the compressed gas to ensure the stability of the braking system. In some embodiments, the control valve group 200 includes a pressure control valve 211, a one-way valve 212, and an oil-water separator 213. The pressure control valve 211, the one-way valve 212, and the oil-water separator 213 can be obtained by being connected in series in sequence or being integrated with each other. The gas storage device 300 is used to store gas with a certain pressure and maintain the pipeline pressure balance. The service air brake valve 400 is used to control and adjust the braking air pressure and flow rate to ensure the stability of the air circuit.
[0032] The service air brake valve 400 is bidirectionally connected to a brake pedal device 800, and the brake pedal device 800 is a device for the driver to input service braking actions. The service air brake valve 400 is connected to a brake assembly. In this embodiment, the brake assembly is a dry axle air-over-oil braking unit 500 and a wet axle air-over-oil braking unit 600.
[0033] The dry axle air-over-oil braking unit 500 includes a dry axle booster device 510, a dry bridge three-way block 520, a shunt joint 530, and a dry axle caliper disc brake 540 that are bidirectionally connected through a liquid medium pipeline. The dry axle booster device 510 is bidirectionally connected to the service air brake valve 400 through the gas medium pipeline 1000. The dry axle booster device 510 is used to convert air pressure into fluid medium pressure and amplify the pressure in a certain proportion. Both the dry bridge three-way block 520 and the shunt joint 530 are three-way pipes / blocks.
[0034] The wet axle air-over-oil braking unit 600 includes a wet axle booster device 610, a wet bridge three-way block 620, and a wet bridge brake 630 that are sequentially bidirectionally connected through the gas medium pipeline 1000. The wet axle booster device 610 is used to convert air pressure into fluid medium pressure and amplify the pressure in a certain proportion. The wet bridge three-way block 620 is a three-way pipe / block, and the wet bridge brake 630 is a braking device inside the wet axle.
[0035] The working principle of the above-mentioned hybrid service braking system with a front wet axle and a rear dry axle includes: by stepping on the brake pedal device 800, the service air brake valve 400 controls the pressure of the gaseous medium. The pressure of the gaseous medium enters the dry axle booster device 510 and the wet axle booster device 610 respectively. At this time, the pressure of the gaseous medium is converted into the pressure of the brake fluid, and acts on the dry axle caliper disc brake 540 and the wet axle brake 630 respectively through the dry bridge three-way block 520, the shunt joint 530 and the wet bridge three-way block 620, so as to realize the braking of the front wet axle and the rear dry axle. Embodiment 2
[0036] As Figure 3 and Figure 4 shown, this embodiment provides a hybrid service braking system with a front wet axle and a rear dry axle. Different from Embodiment 1, the braking component of this embodiment is a dry axle air-over-oil braking unit 500 and a wet axle hydraulic braking unit 700. Among them, the dry axle air-over-oil braking unit 500 is the same as that in Embodiment 1, and will not be elaborated here.
[0037] The wet axle hydraulic braking unit 700 includes a liquid medium pump 710. One path of the liquid medium pump 710 is in one-way communication with a safety device 740 and a liquid medium tank 750 in sequence through a liquid medium pipeline 2000. The second path is in one-way communication with a liquid medium filling device 720, a safety device 740 and a liquid medium tank 750 in sequence through a liquid medium pipeline 2000. The third path is in one-way communication with a liquid medium filling device 720, a liquid medium energy storage device 730 and a service liquid medium brake valve 760 in sequence through a liquid medium pipeline 2000. The fourth path is in one-way communication with a service liquid medium brake valve 760, a wet bridge three-way block 620, a wet bridge brake 630 and a liquid medium tank 750 in sequence through a liquid medium pipeline 2000. The liquid medium tank 750 is in one-way communication with the liquid medium pump 710.
[0038] The liquid medium pump 710 is used to provide a fluid with a preset pressure. The liquid medium filling device 720 is used to control the flow direction of the fluid medium, with one-way flow stoppage in one direction and free flow in the other direction. The liquid medium energy storage device 730 is used to store the excess pressure energy of the fluid medium and maintain the pressure balance of the pipeline. The safety device 740 is a device that ensures the stability of the system pressure and plays a safety protection role. The liquid medium tank 750 is a container for storing the fluid medium. The service liquid medium brake valve 760 is used to control and adjust the pressure and flow rate of the braking fluid medium to ensure the stability of the air circuit. In some embodiments, the service liquid medium brake valve 760, the service air brake valve 400 and the brake pedal device 800 are integrated into an integrated pedal.
[0039] The working principle of the above-mentioned hybrid service braking system with a front wet axle and a rear dry axle includes: by stepping on the brake pedal device 800, the service air brake valve 400 controls the gaseous medium pressure. The gaseous medium pressure enters the dry axle booster device 510, and the gaseous medium pressure is converted into brake fluid pressure. Respectively through the dry axle three-way block 520, the shunt joint 530 and the dry axle caliper disc brake 540, the rear dry axle is braked. By stepping on the brake pedal device 800, the service liquid medium brake valve 760 controls the liquid pressure, and acts on the wet axle brakes 630 on both sides of the wet axle through the wet axle three-way block 620 to achieve the front wet axle braking.
[0040] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can still be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.
Claims
1. A hybrid service braking system with a front wet axle and a rear dry axle, characterized in that, It includes an air compression device, a control valve group, a gas storage device, and a vehicle air brake valve connected in sequence, and the vehicle air brake valve is connected to a brake pedal device; It further includes a brake assembly, and the brake assembly includes two combinations. Among them, the first combination is a dry axle air over oil brake unit and a wet axle air over oil brake unit, and both the dry axle air over oil brake unit and the wet axle air over oil brake unit are connected to the vehicle air brake valve; The second combination is a dry axle air over oil brake unit and a wet axle hydraulic brake unit. The dry axle air over oil brake unit is connected to the vehicle air brake valve, and the wet axle hydraulic brake unit is connected to the brake pedal device; In the first combination, by stepping on the brake pedal device, the vehicle air brake valve can be controlled to control the pressure of the gaseous medium, and the pressure of the gaseous medium acts on the dry axle air over oil brake unit and the wet axle air over oil brake unit to realize the braking of the front wet axle and the rear dry axle; In the second combination, by stepping on the brake pedal device, the pressure of the gaseous medium and the pressure of the liquid medium can be respectively controlled, and the pressure of the gaseous medium and the pressure of the liquid medium act on the dry axle air over oil brake unit and the wet axle hydraulic brake unit respectively to realize the braking of the front wet axle and the rear dry axle.
2. The hybrid vehicle braking system with a front wet axle and a rear dry axle according to claim 1, characterized in that, The dry axle air over oil brake unit includes a dry axle booster device, a dry bridge three-way block, a shunt joint, and a dry axle caliper disc brake connected in sequence and bidirectionally communicated. The dry axle booster device is bidirectionally communicated with the vehicle air brake valve.
3. The hybrid service braking system of the front wet axle and rear dry axle according to claim 2, characterized in that, The internal communication pipeline in the dry axle air over oil brake unit is a gas medium pipeline.
4. The hybrid service braking system with a front wet axle and a rear dry axle according to claim 1, characterized in that, The wet axle air over oil brake unit includes a wet axle booster device, a wet bridge three-way block, and a wet bridge brake connected in sequence and bidirectionally communicated.
5. The hybrid vehicle braking system with a front wet bridge and a rear dry bridge according to claim 4, characterized in that, The internal communication pipeline in the wet axle air over oil brake unit is a liquid medium pipeline.
6. The hybrid service braking system with a front wet axle and a rear dry axle according to claim 1, wherein, The wet axle hydraulic brake unit includes a liquid medium pump, and the liquid medium pump is respectively connected to a safety device, a liquid medium filling device, and a vehicle liquid medium brake valve. The liquid medium filling device is respectively connected to the safety device and a liquid medium energy storage device. The safety device is connected to a liquid medium tank. The liquid medium tank is connected to the liquid medium pump. The liquid medium energy storage device is connected to the vehicle liquid medium brake valve. The vehicle liquid medium brake valve is respectively connected to the brake pedal device and the wet bridge three-way block. The wet bridge three-way block is connected to the wet bridge brake. The wet bridge brake is connected to the liquid medium tank.
7. The hybrid service braking system for a front wet axle and a rear dry axle according to claim 6, wherein, The internal communication pipeline in the wet axle hydraulic brake unit is a liquid medium pipeline.
8. The hybrid service braking system for a front wet axle and rear dry axle according to claim 1, wherein The control valve group includes a pressure control valve, a one-way valve, and an oil-water separator, and the pressure control valve, the one-way valve, and the oil-water separator are connected in series or integrated with each other in sequence.
9. The hybrid service braking system with a front wet bridge and a rear dry bridge according to claim 1, wherein The air compression device, the control valve group, the gas storage device, and the vehicle air brake valve are all unidirectionally communicated through a gas medium pipeline.
10. A loader, characterized in that, It includes the hybrid vehicle braking system for the front wet axle and the rear dry axle according to any one of claims 1 to 9.