A layout structure of a hydraulic system for unloading a fire truck

Abstract

This utility model discloses a layout structure for the hydraulic system of a fire truck undercarriage, including an undercarriage subframe and an undercarriage chassis. A hydraulic oil tank is integrated in the middle of the undercarriage subframe. On one side of the hydraulic oil tank are a suction filter, a suction pipe, and a dual hydraulic pump. The suction filter is installed on the hydraulic oil tank away from the front of the vehicle. One end of the suction pipe is connected to the suction filter, and the other end is connected to the dual hydraulic pump. The dual hydraulic pump is fixed to the main beam of the undercarriage chassis, and its power input end is connected to the power output end of the engine located on the undercarriage chassis. On the other side of the hydraulic oil tank are a return oil filter and a return oil pipe. The return oil filter is installed on the hydraulic oil tank near the front of the vehicle, and the return oil pipe is connected to the return oil filter. This utility model has a compact and reasonable layout, saving layout space and improving the overall space utilization of the fire truck, thus meeting the internal circulation requirements of the fire truck's high-flow hydraulic system.

Description

Technical Field

[0001] This utility model belongs to the technical field of fire truck hydraulic systems, specifically relating to a layout structure of a fire truck undercarriage hydraulic system. Background Technology

[0002] Aerial platform fire trucks mainly consist of two parts: the upper vehicle (boom, work platform, control panel, etc.) and the lower vehicle (chassis, subframe, water tank, etc.). They also include an electrical control system, a water system, and a hydraulic system. These three systems are respectively located in corresponding parts of the upper and lower vehicles, with electrical wires, water pipes, and hydraulic lines running through the internal or side structures of both. The hydraulic system of a large aerial platform fire truck differs from that of a typical aerial platform fire truck in that it requires a different hydraulic oil flow rate. Typical aerial platform fire trucks use only one oil pump to supply oil, and the flow rate is sufficient. However, the existing hydraulic system layout of a typical aerial platform fire truck with a single oil pump is insufficient to meet the high-flow hydraulic system requirements of a large aerial platform fire truck. Therefore, there is an urgent need to develop a hydraulic system layout for the lower vehicle of a fire truck that can meet the high-flow hydraulic system requirements of a large aerial platform fire truck. Utility Model Content

[0003] This utility model addresses the above-mentioned problems and overcomes the shortcomings of existing technologies by providing a layout structure for a hydraulic system for fire truck dismounting.

[0004] To achieve the above objectives, the present invention adopts the following technical solution.

[0005] This utility model provides a hydraulic system layout structure for a fire truck undercarriage, including an undercarriage subframe and an undercarriage chassis located below the undercarriage subframe. A hydraulic oil tank is integrated in the middle of the undercarriage subframe. An oil suction filter, an oil suction pipe, and a dual hydraulic oil pump are located on one side of the hydraulic oil tank. The oil suction filter is installed on the hydraulic oil tank away from the front end of the vehicle. One end of the oil suction pipe is connected to the oil suction filter, and the other end is connected to the dual hydraulic oil pump. The dual hydraulic oil pump is fixed to the main beam of the undercarriage chassis. The power input end of the dual hydraulic oil pump is connected to the power output end of the engine located on the undercarriage chassis. A return oil filter and a return oil pipe are located on the other side of the hydraulic oil tank. The return oil filter is installed on the hydraulic oil tank near the front end of the vehicle, and the return oil pipe is connected to the return oil filter.

[0006] Furthermore, the dual hydraulic oil pump includes a main hydraulic oil pump and an auxiliary hydraulic oil pump. The dual hydraulic oil pump is formed by the main hydraulic oil pump and the auxiliary hydraulic oil pump connected in parallel. The main hydraulic oil pump is provided with a main pump suction port, and the auxiliary hydraulic oil pump is provided with an auxiliary pump suction port.

[0007] Furthermore, the oil suction pipeline includes a main oil suction pipe, a main pump oil suction pipe, an auxiliary pump oil suction pipe, and a reducing tee. One end of the main oil suction pipe is connected to the oil suction filter, and the other end of the main oil suction pipe is connected to one port of the reducing tee. The other two ports of the reducing tee are respectively connected to the main pump oil suction pipe and the auxiliary pump oil suction pipe. The main pump oil suction pipe is connected to the main pump suction port of the main hydraulic oil pump, and the auxiliary pump oil suction pipe is connected to the auxiliary pump suction port of the auxiliary hydraulic oil pump.

[0008] Furthermore, the other two ports of the reducing tee are respectively connected to a main welded joint and a secondary welded joint. The main welded joint is fixedly connected to the main pump suction pipe by a clamp, and the secondary welded joint is fixedly connected to the secondary pump suction pipe by a clamp.

[0009] Furthermore, the main oil suction pipe is equipped with a backup emergency pump suction port for connecting the backup emergency pump.

[0010] Furthermore, the power input end of the dual hydraulic oil pump is connected to a connecting flange, and the connecting flange is connected to the power output end of the engine located on the undercarriage via a drive shaft.

[0011] Furthermore, a T-shaped pump frame is provided at the power input end of the dual hydraulic oil pump. The upper part of the T-shaped pump frame is fixedly connected to the undercarriage, and the lower part of the T-shaped pump frame is fixedly connected to the dual hydraulic oil pump.

[0012] Furthermore, the suction filter is located on the passenger side, and the return filter is located on the driver side.

[0013] The beneficial effects of this utility model are:

[0014] This utility model provides a layout structure for the hydraulic system of a fire truck undercarriage. The hydraulic oil tank is integrated and installed in the middle of the undercarriage subframe, and equipped with a dual hydraulic oil pump. This eliminates the need to find a mounting location for the hydraulic oil tank required by the high-flow dual hydraulic oil pump on the undercarriage chassis, while also freeing up space above the undercarriage subframe for the water tank and boom bucket. The suction and return oil lines are respectively arranged on both sides of the hydraulic oil tank, resulting in a compact and rational pipeline layout. This saves layout space, improves the overall space utilization of the fire truck, and meets the internal circulation requirements of the fire truck's high-flow hydraulic system. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the layout structure of the hydraulic system for dismounting a fire truck, based on one angle of this utility model.

[0016] Figure 2 yes Figure 1 A magnified structural diagram of part A in the middle.

[0017] Figure 3This is a three-dimensional structural diagram of the main suction pipe of the hydraulic system layout structure for a fire truck undercarriage, according to this utility model.

[0018] Figure 4 This is a three-dimensional structural diagram of a dual hydraulic oil pump for the layout structure of a fire truck's unloading hydraulic system, according to this utility model.

[0019] Figure 5 This is a three-dimensional structural diagram of the layout structure of the hydraulic system for fire truck unloading, from another angle.

[0020] The markings in the diagram are as follows: 1 is the undercarriage subframe, 2 is the suction filter, 3 is the hydraulic oil tank, 4 is the main suction pipe, 5 is the clamp, 6 is the main pump suction pipe, 7 is the T-type pump frame, 8 is the undercarriage chassis, 9 is the backup emergency pump suction interface, 10 is the reducing tee, 11 is the auxiliary pump suction pipe, 12 is the auxiliary hydraulic oil pump, 13 is the main hydraulic oil pump, 14 is the connecting flange, 15 is the auxiliary welded joint, 16 is the main welded joint, 17 is the auxiliary pump suction port, 18 is the main pump suction port, and 19 is the return oil filter. Detailed Implementation

[0021] To make the technical problems solved, the technical solutions, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] Combination Figures 1 to 5 As shown, the present invention provides a hydraulic system layout structure for a fire truck undercarriage, including an undercarriage subframe 1 and an undercarriage chassis 8 located below the undercarriage subframe 1. A hydraulic oil tank 3 is integrated in the middle of the undercarriage subframe 1. An oil suction filter 2, an oil suction pipe, and a dual hydraulic oil pump are arranged on one side of the hydraulic oil tank 3. The oil suction filter 2 is installed on the hydraulic oil tank 3 away from the front end of the truck. One end of the oil suction pipe is connected to the oil suction filter 2, and the other end is connected to the dual hydraulic oil pump. The dual hydraulic oil pump is fixed to the main beam of the undercarriage chassis 8. The power input end of the dual hydraulic oil pump is connected to the power input end of the engine located on the undercarriage chassis 8. The output end is connected; on the other side of the hydraulic oil tank 3, a return oil filter 19 and a return oil pipeline are provided. The return oil filter 19 is installed on the hydraulic oil tank 3 near the front end of the vehicle, and the return oil pipeline is connected to the return oil filter 19; wherein, the dual hydraulic oil pump includes a main hydraulic oil pump 13 and an auxiliary hydraulic oil pump 12. The dual hydraulic oil pump is formed by the main hydraulic oil pump 13 and the auxiliary hydraulic oil pump 12 connected in parallel. The main hydraulic oil pump 13 is provided with a main pump suction port 18, and the auxiliary hydraulic oil pump 12 is provided with an auxiliary pump suction port 17; the dual hydraulic oil pump can increase the circulation flow of hydraulic oil in the hydraulic system of the fire truck, and can meet the needs of the high-flow hydraulic system of the fire truck.

[0023] In a preferred embodiment of this utility model, the oil suction pipeline includes a main oil suction pipe 4, a main pump oil suction pipe 6, an auxiliary pump oil suction pipe 11, and a reducing tee 10. One end of the main oil suction pipe 4 is connected to the oil suction filter 2 through a flange joint, and the other end of the main oil suction pipe 4 is connected to one port of the reducing tee 10 by welding. The other two ports of the reducing tee 10 are respectively connected to the main pump oil suction pipe 6 and the auxiliary pump oil suction pipe 11. The main pump oil suction pipe 6 is connected to the main pump oil suction port 18 of the main hydraulic oil pump 13, and the auxiliary pump oil suction pipe 11 is connected to the auxiliary pump oil suction port 17 of the auxiliary hydraulic oil pump 12. The diameter of the auxiliary pump oil suction pipe 11 is smaller than the diameter of the main pump oil suction pipe 6.

[0024] In a preferred embodiment of the present invention, the other two ports of the reducing tee 10 are respectively connected to a main welding joint 16 and a secondary welding joint 15. The main welding joint 16 is fixedly connected to the main pump suction pipe 6 by a clamp 5, and the secondary welding joint 15 is fixedly connected to the secondary pump suction pipe 11 by a clamp 5.

[0025] In a preferred embodiment of this utility model, the main oil suction pipe 4 is provided with a backup emergency pump suction port 9; when a backup emergency pump is needed, the backup emergency pump is connected using the backup emergency pump suction port 9.

[0026] In a preferred embodiment of this utility model, the power input end of the dual hydraulic oil pump is provided with a connecting flange 14, which is connected to the power output end of the engine located on the undercarriage 8 via a drive shaft. The engine located on the undercarriage 8 provides a power source for the dual hydraulic oil pump, and the rotational mechanical energy output by the engine is converted into the hydraulic energy required by the fire truck hydraulic system through the dual hydraulic oil pump, so as to realize the overall operation of the fire truck hydraulic system.

[0027] As a preferred embodiment of this utility model, a T-shaped pump frame 7 is also provided at the power input end of the dual hydraulic oil pump. The upper part of the T-shaped pump frame 7 is fixedly connected to the undercarriage 8 by bolts, and the lower part of the T-shaped pump frame 7 is fixedly connected to the dual hydraulic oil pump. Through the T-shaped pump frame 7, the dual hydraulic oil pump can be firmly installed on the main beam of the undercarriage 8.

[0028] In a preferred embodiment of this utility model, the suction filter 2 is located on the passenger side, and the return filter 9 is located on the driver side. Figure 1 and Figure 5 As shown.

[0029] Specifically, the oil suction filter 2, oil suction pipe, dual hydraulic oil pump and T-type pump bracket 7 are all installed on the passenger side, and the whole is on the same side as the power output end of the engine of the undercarriage 8. This installation layout makes the connection distance between the components short, the installation cost low, and facilitates maintenance and replacement.

[0030] This utility model integrates the hydraulic oil tank 3 into the middle of the subframe 1 of the lower vehicle. This eliminates the need to find an installation location for the hydraulic oil tank 3 required by the high-flow dual hydraulic oil pump on the chassis 8, while also freeing up space above the subframe 1 for the water tank and boom bucket. The suction filter 2 is located on the passenger side, and the return filter 9 is located on the driver side. When the hydraulic oil circulates, the suction pipe and return pipe are respectively arranged on both sides of the hydraulic oil tank 3. The pipe layout is compact and reasonable, saving layout space and improving the overall space utilization of the fire truck, thus meeting the internal circulation requirements of the high-flow hydraulic system of the fire truck.

[0031] The working principle is explained with reference to the accompanying drawings and technical solutions: The dual hydraulic oil pump of this utility model draws hydraulic oil from the hydraulic oil tank 3 through the suction pipe, and then delivers it to the outrigger cylinders, boom cylinders, balance cylinders, and swing cylinders on the fire truck through the delivery pipe to control the movement of each cylinder. Then, the hydraulic oil flows back to the hydraulic oil tank 3 through the return pipe and return filter 19. The hydraulic oil circulates back and forth under the action of the dual hydraulic oil pump, so as to realize the stable operation of the fire truck hydraulic system and ensure the stable operation of each cylinder. Specifically, the main hydraulic oil pump 13 controls the reciprocating motion of the outrigger cylinders and boom cylinders, and the auxiliary hydraulic oil pump 12 controls the reciprocating motion of the balance cylinders and swing cylinders of the working bucket.

[0032] It is understood that the above specific description of this utility model is only used to illustrate this utility model and is not limited to the technical solutions described in the embodiments of this utility model. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of this utility model.

Claims

1. A layout structure for a hydraulic system for unloading a fire truck, characterized in that: The vehicle includes a subframe and a chassis located below the subframe. A hydraulic oil tank is integrated in the middle of the subframe. One side of the hydraulic oil tank is equipped with a suction filter, a suction pipe, and a dual hydraulic pump. The suction filter is mounted on the hydraulic oil tank away from the front of the vehicle. One end of the suction pipe is connected to the suction filter, and the other end is connected to the dual hydraulic pump. The dual hydraulic pump is fixed to the main beam of the chassis. The power input end of the dual hydraulic pump is connected to the power output end of the engine located on the chassis. On the other side of the hydraulic oil tank, a return oil filter and a return oil pipe are provided. The return oil filter is mounted on the hydraulic oil tank near the front of the vehicle, and the return oil pipe is connected to the return oil filter.

2. The hydraulic system layout structure of a fire fighting truck lower carriage according to claim 1, characterized in that: The dual hydraulic pump includes a main hydraulic pump and an auxiliary hydraulic pump. The dual hydraulic pump is formed by the main hydraulic pump and the auxiliary hydraulic pump connected in parallel. The main hydraulic pump is provided with a main pump suction port, and the auxiliary hydraulic pump is provided with an auxiliary pump suction port.

3. The hydraulic system layout structure of a fire fighting truck lower carriage according to claim 2, characterized in that: The oil suction pipeline includes a main oil suction pipe, a main pump oil suction pipe, an auxiliary pump oil suction pipe, and a reducing tee. One end of the main oil suction pipe is connected to the oil suction filter, and the other end of the main oil suction pipe is connected to one port of the reducing tee. The other two ports of the reducing tee are respectively connected to the main pump oil suction pipe and the auxiliary pump oil suction pipe. The main pump oil suction pipe is connected to the main pump oil suction port of the main hydraulic oil pump, and the auxiliary pump oil suction pipe is connected to the auxiliary pump oil suction port of the auxiliary hydraulic oil pump.

4. The hydraulic system layout structure of a fire fighting truck lower carriage according to claim 3, characterized in that: The other two ports of the reducing tee are respectively connected to a main welded joint and a secondary welded joint. The main welded joint is fixedly connected to the main pump suction pipe by a clamp, and the secondary welded joint is fixedly connected to the secondary pump suction pipe by a clamp.

5. The hydraulic system layout structure of a fire fighting truck lower carriage according to claim 3, characterized in that: The main oil suction pipe is equipped with a backup emergency pump suction port for connecting to the backup emergency pump.

6. The hydraulic system layout for a fire apparatus according to Claim 1, wherein: The power input end of the dual hydraulic oil pump is equipped with a connecting flange, which is connected to the power output end of the engine located on the undercarriage via a drive shaft.

7. The hydraulic system layout structure of a fire fighting truck lower carriage according to claim 1, characterized in that: The power input end of the dual hydraulic oil pump is also equipped with a T-shaped pump frame. The upper part of the T-shaped pump frame is fixedly connected to the undercarriage, and the lower part of the T-shaped pump frame is fixedly connected to the dual hydraulic oil pump.

8. The hydraulic system layout for a fire apparatus according to Claim 1, wherein: The suction filter is located on the passenger side, and the return filter is located on the driver side.

Images