A wiring harness via protection structure for a hydrogen fuel cell bus onboard hydrogen supply system

Abstract

The present invention discloses a through-hole protection structure for a wiring harness of a hydrogen fuel cell bus onboard hydrogen supply system, which includes a roof panel and a through-hole wiring harness, wherein a connecting pipe is fixedly connected to the top of the roof panel, a nut is connected to the top of the connecting pipe through an external thread, a retaining ring is provided at the top of the nut, a curved pipe is sealed and connected to the inner side of the retaining ring through a sealing gasket, and the through-hole wiring harness is located in the curved pipe and extends into the inner side of the roof panel through the connecting pipe. By adopting a curved pipe and a plurality of elastic material blocks for sealing connection, the structure is simple and the installation is convenient, and rainwater can be effectively prevented from entering the fuel cell engine compartment and the passenger compartment along the through-hole wiring harness, thereby avoiding electrical safety accidents and false alarm faults caused by short circuit of the wiring harness due to wear of the hydrogen management controller, and a good use effect is achieved.

Description

Technical Field

[0001] The invention relates to a hydrogen supply device, in particular to a harness via protection structure for a hydrogen supply system on a hydrogen fuel cell bus, and belongs to the technical field of automobile hydrogen supply and storage equipment. Background Art

[0002] Fuel cells that use hydrogen as their energy source have been well applied and researched in the field of new energy vehicles due to their high efficiency and pollution-free characteristics. Compared with traditional and pure electric vehicles, they have many advantages.

[0003] The on-board hydrogen supply system is an important component of fuel cell vehicles, providing fuel supply for fuel cell engines. It generally consists of four parts: fuel filling module, hydrogen storage module, hydrogen supply module and electronic control module. Usually for hydrogen fuel cell buses, the hydrogen storage module, hydrogen supply module and electronic control module of the on-board hydrogen supply system are arranged on the roof, and the fuel filling module is arranged on the side and rear of the vehicle body. For the hydrogen storage module, in order to ensure the safety of hydrogen, a protective cover plate is designed on the top, and it is an open-hole design. In rainy weather or when washing the car, rainwater may enter the protective cover plate through the protective cover plate and gather on the roof; for the electronic control module, the hydrogen management controller needs to be connected to the low-voltage power supply of the whole vehicle, the whole vehicle communication, the high and low pressure sensors of the on-board hydrogen supply system, the hydrogen concentration sensor, the temperature sensor and other units to ensure that the signal can be sent and received correctly and hydrogen safety management can be implemented. However, some wiring harnesses of the hydrogen management controller must be connected to the whole vehicle communication, the hydrogen concentration sensor located in the hydrogen fuel cell engine compartment and the passenger compartment, and the low-voltage power supply of the whole vehicle through the roof opening, and there is a risk of electrical safety accidents due to water leakage at the opening.

[0004] To solve the above-mentioned shortcomings, CN207535835U discloses a waterproof rubber sleeve for automotive wiring harnesses, which prevents water from entering the wiring harnesses and causing short circuits in the automotive lines. The rubber sleeve comprises a rubber sleeve body and a wiring harness sleeve, and a water-absorbing layer is provided between the rubber sleeve body and the wiring harness sleeve. The water-absorbing layer can prevent the flow of liquid for a short time, but it is difficult to continue to function after being saturated with water; CN207725225U discloses a waterproof seal for wiring harnesses for new energy vehicles with good water-blocking and waterproof effects, comprising a connecting tube and two end caps, and an inner blocking block is also provided in the end cap, and water-blocking grease is provided between the inner blocking block and the end cap. This design is relatively complicated and inconvenient to operate. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a wiring harness through-hole protection structure for a hydrogen fuel cell bus on-board hydrogen supply system. The structure is simple and easy to install by adopting a bent pipe and a plurality of elastic material blocks for sealing connection. The structure can effectively prevent rainwater from entering the fuel cell engine compartment and the passenger compartment along the through-hole wiring harness, thereby avoiding electrical safety accidents and false alarm failures caused by short circuit of the wiring harness in the hydrogen management controller, thereby effectively solving the above-mentioned problems.

[0006] The technical solution of the present invention is: a wiring harness through-hole protection structure for an on-board hydrogen supply system of a hydrogen fuel cell bus, which includes a roof panel and a through-hole wiring harness, a connecting pipe is fixedly connected to the top of the roof panel, a nut is connected to the top of the connecting pipe through an external thread, a retaining ring is provided on the top of the nut, a bent pipe is sealed and connected to the inner side of the retaining ring through a sealing gasket, the through-hole wiring harness is located in the bent pipe and extends into the inner side of the roof panel through the connecting pipe.

[0007] The elbow is composed of two sections that are fixedly connected, the bottom section is arranged vertically and butted against the connecting pipe, and the top section is arranged tilted downward and connected to the bottom section in a smooth transition.

[0008] The elbow and the connecting pipe are both provided with elastic material blocks, which are respectively an end elastic material block located inside the connecting pipe, a middle elastic material block located at the elbow unbending part, and a front elastic material block located at the elbow entrance.

[0009] The elastic material block is a disc-shaped structure, a circular hole is arranged at the center of the elastic material block, a cross-shaped wedge-shaped cutout is arranged around the circular hole, and the through-hole harness is located in the circular hole and passes through.

[0010] The end elastic material block is connected to the inner wall of the connecting pipe by interference fit, the middle elastic material block is connected to the inner wall of the curved pipe by clearance fit, and the front elastic material block is connected to the inner wall of the curved pipe by interference fit.

[0011] The elastic material block is made of polymer materials such as SEBS, TPV, TPU, EVA, SBR, CR, NBR, HNBR, EPDM, FPM, IIR, TR, CPE, etc., and weather-resistant materials such as EPDM, EVA, IIR, HNBR, CR, etc. are preferred.

[0012] The beneficial effects of the present invention are as follows: compared with the prior art, the technical solution of the present invention is adopted, by using a bent pipe and a plurality of elastic material blocks for sealing connection, the structure is simple, and the installation is convenient. It can effectively prevent rainwater from entering the fuel cell engine compartment and the passenger compartment along the through-hole wiring harness, avoid electrical safety accidents, and avoid false alarm failures of the hydrogen management controller caused by short circuit due to harness wear, thereby achieving a very good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the present invention;

[0014] Figure 2 It is a schematic diagram of the structure of the elastic material block of the present invention;

[0015] Figure 3 It is a schematic diagram of the installation structure of the present invention;

[0016] Figure 4 It is the connection principle diagram of the present invention. DETAILED DESCRIPTION

[0017] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings of this specification.

[0018] As attached Figures 1 to 4 As shown, a wiring harness through-hole protection structure for an on-board hydrogen supply system of a hydrogen fuel cell bus comprises a roof panel 2 and a through-hole wiring harness 8, wherein a connecting pipe 201 is fixedly connected to the top of the roof panel 2, a nut 302 is connected to the top of the connecting pipe 201 via an external thread, a retaining ring 301 is provided on the top of the nut 302, a curved pipe 3 is sealedly connected to the inner side of the retaining ring 301 via a sealing gasket 10, and the through-hole wiring harness 8 is located in the curved pipe 3 and extends into the inner side of the roof panel 2 via the connecting pipe 201.

[0019] Furthermore, the curved pipe 3 is fixedly connected in two sections, the bottom section is arranged vertically and docked with the connecting pipe 201, and the top section is arranged tilted downward and connected with the bottom section in a smooth transition.

[0020] Furthermore, elastic material blocks 9 are provided in the bend pipe 3 and the connecting pipe 201, which are respectively an end elastic material block 903 located on the inner side of the connecting pipe 201, a middle elastic material block 902 located at the bending part of the bend pipe 3, and a front elastic material block 901 located at the entrance of the bend pipe 3.

[0021] Furthermore, the elastic material block 9 is a disc-shaped structure, a circular hole 905 is provided at the center of the elastic material block 9 , a cross-shaped wedge-shaped cutout 906 is provided around the circular hole 905 , and the through-hole harness 8 is located in the circular hole 905 and passes through it.

[0022] Furthermore, the end elastic material block 903 is connected to the inner wall of the connecting pipe 201 by interference fit, the middle elastic material block 902 is connected to the inner wall of the curved pipe 3 by clearance fit, and the front elastic material block 901 is connected to the inner wall of the curved pipe 3 by interference fit.

[0023] Furthermore, the elastic material block 9 is made of polymer materials such as SEBS, TPV, TPU, EVA, SBR, CR, NBR, HNBR, EPDM, FPM, IIR, TR, CPE, etc., preferably weather-resistant materials such as EPDM, EVA, IIR, HNBR, CR, etc.

[0024] The on-board hydrogen supply system 1 is fastened to the roof panel 2 of the hydrogen fuel cell bus by bolts. A connecting pipe 201 is provided on the roof panel 2 near the hydrogen management controller 4. The bent pipe 3 is connected to the connecting pipe 201 through a connecting nut 302. At the same time, a sealing gasket 10 is provided between the connecting nut 302 and the retaining ring 301. One end of the hydrogen storage system harness 5 is connected to the hydrogen management controller 4, and the other end is connected to the high-pressure pressure sensor, temperature sensor, and high-pressure solenoid valve on the bottle mouth combination valve of the high-pressure hydrogen storage container in the on-board hydrogen supply system 1. One end of the hydrogen supply system harness 6 is connected to the hydrogen management controller 4, and the other end is connected to the on-board hydrogen supply system 1 is connected to the medium-pressure solenoid valve and the medium-pressure pressure sensor integrated on the pressure reducer; one end of the hydrogen storage module hydrogen concentration sensor harness 7 is connected to the hydrogen management controller 4, and the other end is connected to the hydrogen concentration sensor in the vehicle-mounted hydrogen supply system 1; one end of the through-hole harness 8 is connected to the hydrogen management controller 4, and the other end passes through the elbow 3 and is respectively connected to the hydrogen concentration sensor of the hydrogen fuel cell engine compartment and the passenger compartment through the fuel cell engine compartment and the passenger compartment hydrogen concentration sensor harness 801, the communication harness 802, and the low-voltage power harness 803 with the hydrogen fuel cell engine compartment and the passenger compartment hydrogen concentration sensor, the vehicle communication harness, and the vehicle low-voltage power supply; three elastic material blocks 9 are provided in the elbow 3;

[0025] Furthermore, the vehicle-mounted hydrogen supply system 1 is composed of a hydrogen storage module, a hydrogen supply module, an electronic control module, and a fuel filling module, wherein the hydrogen storage module is composed of a high-pressure hydrogen storage bottle, on which an integrated bottle valve and a hydrogen concentration sensor are installed, wherein the integrated bottle valve is integrated with components such as a high-pressure pressure sensor, a high-pressure solenoid valve, and a temperature sensor; the hydrogen supply module is composed of components such as a pressure reducer, a medium-pressure solenoid valve, and a medium-pressure pressure sensor; the electronic control module is composed of a hydrogen management controller 4, a hydrogen storage system wiring harness 5, a hydrogen supply system wiring harness 6, a hydrogen storage module hydrogen concentration sensor wiring harness 7, and a via wiring harness 8;

[0026] Furthermore, a connecting pipe 201 made of the same material as the roof panel 2 is provided on the roof panel 2, and the diameter of the pipe needs to ensure that the connector of the through-hole harness 8 can pass through, and the height is 45mm~80mm; an on-board hydrogen supply system 1 is arranged on the roof panel 2, and the two are fastened and connected by bolts;

[0027] Furthermore, the cross-sectional shape of the curved pipe 3 is circular, and is made of steel of the same specification as the roof panel 2 or stainless steel, hot-dip galvanized steel, electro-galvanized color blunt steel, with a pipe diameter of 40mm~80mm, a wall thickness of 1.6mm~3mm, and a curvature radius of the curved part of 20mm~40mm; the height of the straight part of the curved pipe 3 is 100mm~220mm;

[0028] Furthermore, a retaining ring 301 and a connecting nut 302 are provided on the bent pipe 3, wherein the retaining ring 301 can be integrally formed with the bent pipe 3, or can be designed to be connected by threads; the connecting nut 302 can move freely along the center line direction of the bent pipe 3 until it is blocked by the retaining ring 301; in addition, a sealing gasket 10 is provided between the retaining ring 301 and the connecting nut 302 to prevent rainwater from flowing along the wall of the bent pipe 3 into the connecting pipe 201;

[0029] Furthermore, the hydrogen management controller 4 is an indispensable unit of the vehicle-mounted hydrogen supply system 1, which not only detects the system operation status, including the status, temperature, bottle pressure, pipeline pressure and hydrogen leakage concentration of the hydrogen bottle; but also realizes efficient control, calculates the hydrogen consumption of the system operation, estimates the remaining amount of hydrogen, identifies faults, and communicates with the whole vehicle through the communication bus, sends information to the whole vehicle controller and / or the fuel cell engine controller, receives instructions from the whole vehicle controller and / or the fuel cell engine controller and takes corresponding actions;

[0030] Furthermore, the hydrogen storage system harness 5 is used to establish electrical connection between the high-pressure pressure sensor, temperature sensor, high-pressure solenoid valve on the bottle mouth combination valve of each high-pressure hydrogen storage container of the vehicle-mounted hydrogen supply system 1 and the hydrogen management controller 4;

[0031] Furthermore, the hydrogen supply system harness 6 is used to establish an electrical connection between the medium-pressure solenoid valve and the medium-pressure pressure sensor integrated on the pressure reducer in the vehicle-mounted hydrogen supply system 1 and the hydrogen management controller 4;

[0032] Further, the hydrogen concentration sensor harness 7 of the hydrogen storage module is used to establish an electrical connection between the hydrogen concentration sensor installed on the hydrogen storage module in the vehicle-mounted hydrogen supply system 1 and the hydrogen management controller 4;

[0033] Further, the through-hole harness 8 includes a fuel cell engine compartment and a passenger compartment hydrogen concentration sensor harness 801, a communication harness 802, and a low-voltage power harness 803, which are used to establish electrical connections between the hydrogen concentration sensor located in the fuel cell engine compartment and the passenger compartment, the vehicle communication bus, the vehicle low-voltage power supply, and the hydrogen management controller 4;

[0034] Further, the elastic material block 9 is a structure with a wedge-shaped cutout 906 and a circular hole 905 at the center, and the elastic material block 9 includes an elastic material block 901 at the front end of the bend, an elastic material block 902 in the middle of the bend, and an elastic material block 903 at the end, wherein the central apertures of the elastic material block 901 at the front end of the bend and the elastic material block 902 in the middle of the bend are 5mm~15mm, and the central aperture of the elastic material block 903 at the end can smoothly pass through the connector of the through-hole harness 8; the elastic material block 901 at the front end of the bend is interference fit with the bend 3, which can inhibit rainwater and dust from entering the fuel cell engine compartment through the bend 3; the size of the elastic material block 902 in the middle of the bend is slightly smaller than the cross-sectional size of the bend 3 by 1.5mm~3mm, avoiding friction damage between the through-hole harness 8 and the inner wall of the bend 3; the elastic material block 903 at the end is interference fit with the connecting pipe 201, so as to facilitate assembly operation and prevent the through-hole harness 8 from being worn and broken;

[0035] Furthermore, the installation sequence between the through-hole harness 8 and the bent pipe 3, the connecting pipe 201, and the elastic material block 9 is as follows:

[0036] After the through-hole harness 8 is led out from one end of the hydrogen management controller 4, the end connected to the fuel cell engine compartment and the passenger compartment hydrogen concentration sensor, the vehicle communication and the vehicle low-voltage power supply passes through the elastic material block 901 at the front end of the elbow and the elastic material block 902 in the middle of the elbow in turn, and fixes it according to the pre-designed data size, and then passes through the elbow 3 provided with a connecting nut 302, a sealing gasket 10 and a retaining ring 301 along the tangent direction of the entrance of the elbow 3, and then passes through the end elastic material block 903 with an interference fit with the connecting pipe 201, and finally the elbow 3 and the connecting pipe 201 are fastened and connected through the connecting nut 302; the lowest point of the through-hole harness 8 between the hydrogen management controller 4 and the entrance of the elbow 3 must be lower than the height of the through-hole harness 8 and the hydrogen management controller 4, and the through-hole harness 8 and the entrance of the elbow 3;

[0037] Embodiment 1: This embodiment provides a wiring harness via protection structure for a fuel cell bus onboard hydrogen supply system, and the specific design is as follows:

[0038] The on-board hydrogen supply system 1 is fastened to the roof panel 2 of the hydrogen fuel cell bus by bolts. A connecting pipe 201 with the same material as the roof panel 2, a height of 45mm and a diameter of 40mm is provided on the roof panel 2 near the hydrogen management controller 4. The straight end height of the circular cross-section elbow 3 made of hot-dip galvanized material is 220mm, the diameter is 40mm, and the curvature radius of the curved part is 20mm. An integrally formed retaining ring 301 is provided on the elbow 3. After installing the sealing gasket 10 and the connecting nut 302, the through-hole harness 8 is led out from one end of the hydrogen management controller 4 and connected to the fuel cell engine compartment and One end of the passenger compartment hydrogen concentration sensor, vehicle communication and vehicle low-voltage power supply connection passes through the EPDM material elbow front end elastic material block 901, the middle elastic material block 902, and then passes through the elbow 3, and the front end elastic material block 901 of the elbow is pressed into the elbow 3, and the end elastic material block 903 is pressed into the connecting pipe 201, and then the lead-out end of the through-hole harness 8 passes through the connecting pipe 201 and the end elastic material block 903, and then respectively introduces the fuel cell engine compartment and the passenger compartment to connect with the hydrogen concentration sensor, the vehicle communication bus and the vehicle low-voltage power supply. Among them, the elastic material block 901 at the front end of the bend and the elastic material block 902 in the middle of the bend are structures with wedge-shaped cuts and a circular hole with a diameter of 5mm in the center; the elastic material block 903 at the end is a circular hole with a wedge-shaped cut and a center that can ensure the passage of the through-hole harness 8 connector; the elastic material block 901 at the front end of the bend is interference fit with the bend 3, which can prevent rainwater and dust from entering the fuel cell engine compartment through the bend 3; the elastic material block 902 in the middle of the bend is slightly smaller than the cross-sectional size of the bend 3 by 3mm, avoiding friction and damage between the through-hole harness 8 and the inner wall of the bend 3; the elastic material block 903 at the end is interference fit with the connecting pipe 201, ensuring that the through-hole harness is not worn or broken by hard objects.

[0039] The fuel cell bus on-board hydrogen supply system wiring harness through-hole protection structure proposed by the present invention has a simple structure and is easy to install. It can effectively prevent rainwater from entering the fuel cell engine compartment and the passenger compartment along the through-hole wiring harness, avoid electrical safety accidents, and avoid false alarm faults caused by short circuit of the wiring harness due to wear of the hydrogen management controller.

[0040] Embodiment 2: This embodiment provides a wiring harness through-hole protection structure for a fuel cell bus onboard hydrogen supply system, and the specific design is as follows:

[0041] The on-board hydrogen supply system 1 is fastened to the roof panel 2 of the hydrogen fuel cell bus by bolts. A connecting pipe 201 with the same material as the roof panel 2, a height of 60mm and a diameter of 50mm is provided on the roof panel 2 near the hydrogen management controller 4. The straight end of the round cross-section curved pipe 3 made of stainless steel has a height of 200mm, a diameter of 50mm, and a curvature radius of 25mm. An integrally formed retaining ring 301 is provided on the curved pipe 3. After installing the sealing gasket 10 and the connecting nut 302, the through-hole harness 8 is led out from one end of the hydrogen management controller 4 and connected to the fuel cell engine compartment and One end of the passenger compartment hydrogen concentration sensor, vehicle communication and vehicle low-voltage power supply connection passes through the EVA material front end elastic material block 901, the middle elastic material block 902 of the bent pipe, and then passes through the bent pipe 3, and the front end elastic material block 901 of the bent pipe is pressed into the bent pipe 3, and the end elastic material block 903 is pressed into the connecting pipe 201, and then the lead-out end of the through-hole harness 8 passes through the connecting pipe 201 and the end elastic material block 903, and then is respectively introduced into the fuel cell engine compartment and the passenger compartment to connect with the hydrogen concentration sensor, the vehicle communication bus and the vehicle low-voltage power supply. Among them, the elastic material block 901 at the front end of the bend and the elastic material block 902 in the middle of the bend are structures with wedge-shaped cuts and a circular hole with a diameter of 10 mm in the center; the elastic material block 903 at the end is a circular hole with a wedge-shaped cut and a center that can ensure the passage of the connector of the through-hole harness 8; the elastic material block 901 at the front end of the bend is interference fit with the bend 3, which can prevent rainwater and dust from entering the fuel cell engine compartment through the bend 3; the size of the elastic material block 902 in the middle of the bend is slightly smaller than the cross-sectional size of the bend 3 by 2 mm, avoiding friction and damage between the through-hole harness 8 and the inner wall of the bend 3; the elastic material block 903 at the end is interference fit with the connecting pipe 201, ensuring that the through-hole harness is not worn or broken by hard objects.

[0042] The fuel cell bus on-board hydrogen supply system wiring harness through-hole protection structure proposed by the present invention has a simple structure and is easy to install. It can effectively prevent rainwater from entering the fuel cell engine compartment and the passenger compartment along the through-hole wiring harness, avoid electrical safety accidents, and avoid false alarm faults caused by short circuit of the wiring harness due to wear of the hydrogen management controller.

[0043] Embodiment 3: This embodiment provides a wiring harness through-hole protection structure for a hydrogen supply system on a fuel cell bus, and the specific design is as follows:

[0044] The on-board hydrogen supply system 1 is fastened to the roof panel 2 of the hydrogen fuel cell bus by bolts. A connecting pipe 201 with the same material as the roof panel 2, a height of 80mm and a diameter of 50mm is provided on the roof panel 2 near the hydrogen management controller 4. The straight end of the round cross-section curved pipe 3 made of stainless steel has a height of 100mm, a diameter of 65mm, and a curvature radius of 35mm. An integrally formed retaining ring 301 is provided on the curved pipe 3. After installing the sealing gasket 10 and the connecting nut 302, the through-hole harness 8 is led out from one end of the hydrogen management controller 4 and connected to the fuel cell engine compartment. The end connected to the passenger compartment hydrogen concentration sensor, vehicle communication and vehicle low-voltage power supply passes through the CR material elbow front end elastic material block 901, the middle elastic material block 902, and then passes through the elbow 3, and the front end elastic material block 901 of the elbow is pressed into the elbow 3, and the end elastic material block 903 is pressed into the connecting pipe 201, and then the lead-out end of the through-hole harness 8 passes through the connecting pipe 201 and the end elastic material block 903, and then is introduced into the fuel cell engine compartment and the passenger compartment respectively to connect with the hydrogen concentration sensor, the vehicle communication bus and the vehicle low-voltage power supply. Among them, the elastic material block 901 at the front end of the bend and the elastic material block 902 in the middle of the bend are structures with wedge-shaped cuts and a circular hole with a diameter of 15mm in the center; the elastic material block 903 at the end is a circular hole with a wedge-shaped cut and a center that can ensure the passage of the connector of the through-hole harness 8; the elastic material block 901 at the front end of the bend is interference fit with the bend 3, which can prevent rainwater and dust from entering the fuel cell engine compartment through the bend 3; the size of the elastic material block 902 in the middle of the bend is slightly smaller than the cross-sectional size of the bend 3 by 1.5mm, avoiding friction and damage between the through-hole harness 8 and the inner wall of the bend 3; the elastic material block 903 at the end is interference fit with the connecting pipe 201, ensuring that the through-hole harness is not worn or broken by hard objects.

[0045] The fuel cell bus on-board hydrogen supply system wiring harness through-hole protection structure proposed by the present invention has a simple structure and is easy to install. It can effectively prevent rainwater from entering the fuel cell engine compartment and the passenger compartment along the through-hole wiring harness, avoid electrical safety accidents, and avoid false alarm faults caused by short circuit of the wiring harness due to wear of the hydrogen management controller.

[0046] Embodiment 4: This embodiment provides a wiring harness through-hole protection structure for a hydrogen supply system on a fuel cell bus, and the specific design is as follows:

[0047] The on-board hydrogen supply system 1 is fastened to the roof panel 2 of the hydrogen fuel cell bus by bolts. A connecting pipe 201 with the same material as the roof panel 2, a height of 80mm, and a diameter of 50mm is provided on the roof panel 2 near the hydrogen management controller 4. The straight end of the circular cross-section curved pipe 3 with the same material as the roof panel 2 has a height of 140mm, a diameter of 80mm, and a curvature radius of 40mm. The curved pipe 3 is provided with a retaining ring 301 with a threaded fixed connection. After installing the sealing gasket 10 and the connecting nut 302, the through-hole harness 8 is led out from one end of the hydrogen management controller 4 and connected to the fuel cell engine. One end connected to the hydrogen concentration sensor in the engine compartment and the passenger compartment, the vehicle communication and the low-voltage power supply of the vehicle passes through the elastic material block 901 at the front end of the HNBR curved pipe, the elastic material block 902 in the middle of the curved pipe, and then passes through the curved pipe 3, and the elastic material block 901 at the front end of the curved pipe is pressed into the curved pipe 3, and the elastic material block 903 at the end is pressed into the connecting pipe 201, and then the lead-out end of the through-hole harness 8 passes through the connecting pipe 201 and the elastic material block 903 at the end, and then is respectively introduced into the fuel cell engine compartment and the passenger compartment to connect with the hydrogen concentration sensor, the vehicle communication bus and the low-voltage power supply of the vehicle. Among them, the elastic material block 901 at the front end of the bend and the elastic material block 902 in the middle of the bend are structures with a wedge-shaped cut and a circular hole with a diameter of 15mm in the center; the elastic material block 903 at the end is a circular hole with a wedge-shaped cut and a center that can ensure the passage of the connector of the through-hole harness 8; the elastic material block 901 at the front end of the bend is interference fit with the bend 3, which can prevent rainwater and dust from entering the fuel cell engine compartment through the bend 3; the size of the elastic material block 902 in the middle of the bend is slightly smaller than the cross-sectional size of the bend 3 by 2mm, avoiding friction damage between the through-hole harness 8 and the inner wall of the bend 3; the elastic material block 903 at the end is interference fit with the connecting pipe 201, ensuring that the through-hole harness is not worn or broken by hard objects.

[0048] The fuel cell bus on-board hydrogen supply system wiring harness through-hole protection structure proposed by the present invention has a simple structure and is easy to install. It can effectively prevent rainwater from entering the fuel cell engine compartment and the passenger compartment along the through-hole wiring harness, avoid electrical safety accidents, and avoid false alarm faults caused by short circuit of the wiring harness due to wear of the hydrogen management controller.

[0049] The parts not described in detail in the present invention are all known technologies to those skilled in the art. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A wiring harness through-hole protection structure for a hydrogen fuel cell bus onboard hydrogen supply system, comprising a roof panel (2) and a through-hole wiring harness (8), characterized in that: A connecting pipe (201) is fixedly connected to the top of the roof panel (2), a nut (302) is connected to the top of the connecting pipe (201) via an external thread, a retaining ring (301) is provided at the top of the nut (302), a curved pipe (3) is sealedly connected to the inner side of the retaining ring (301) via a sealing gasket (10), a through-hole harness (8) is located in the curved pipe (3) and extends into the inner side of the roof panel (2) via the connecting pipe (201); the curved pipe (3) is fixedly connected in two sections, the bottom section is arranged vertically and docked with the connecting pipe (201), and the top section is arranged downwardly tilted and smoothly connected to the bottom section; elastic material blocks (9) are provided in both the curved pipe (3) and the connecting pipe (201), which are located on the inner side of the connecting pipe (201) ... An end elastic material block (903), a middle elastic material block (902) located at the bending position of the bent pipe (3), and a front elastic material block (901) located at the entrance of the bent pipe (3): the elastic material block (9) is a disc-shaped structure, a circular hole (905) is provided at the center of the elastic material block (9), a cross-shaped wedge-shaped cutout (906) is provided around the circular hole (905), and a through-hole harness (8) is located in the circular hole (905) and passes through; the end elastic material block (903) is connected to the inner wall of the connecting pipe (201) by an interference fit, the middle elastic material block (902) is connected to the inner wall of the bent pipe (3) by a clearance fit, and the front elastic material block (901) is connected to the inner wall of the bent pipe (3) by an interference fit.

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