Wire harness support, engine wire harness assembly, engine assembly, and vehicle

Abstract

The application discloses a wire harness support, an engine wire harness assembly, an engine assembly and a vehicle, and belongs to the field of vehicle wire harnesses. The wire harness support comprises a support body, the support body is installed on the front side of an engine shell through a fastening assembly, a first limiting part and a second limiting part are detachably connected to the support body, the first limiting part is suitable for limiting a low-voltage wire harness, the second limiting part is suitable for limiting a high-voltage wire harness, and the first limiting part and the second limiting part are arranged in a height direction and are not on the same plane. The wire harness support can synchronously constrain the high-voltage and low-voltage wire harnesses, optimize the wire harness layout and avoid interference with air conditioner pipelines.

Description

Technical Field

[0001] This invention relates to the field of vehicle wiring harnesses, and particularly to a wiring harness bracket, an engine wiring harness assembly, and an engine assembly. Background Technology

[0002] In engine compartment layouts, the front side of the engine casing often has limited space and is surrounded by various auxiliary components such as air conditioning pipes, coolant pipes, and fuel lines. The wiring harness arrangement needs to consider multiple factors, including electromagnetic interference, vibration effects, heat radiation protection, and ease of maintenance. Current technologies for wiring harness brackets can only constrain a single type of wiring harness, making it difficult to effectively fix and spatially isolate low-voltage and high-voltage wiring harnesses simultaneously. Furthermore, some designs fix engine wiring harnesses to air conditioning pipes to avoid space constraints. However, the engine and air conditioning system vibrate at different frequencies and directions during vehicle operation. Their relative movement directly pulls on the wiring harness, causing connector stress, terminal pin retraction, and insulation wear, severely impacting the reliability of electrical connections. Simultaneously, existing brackets lack precise guidance for wiring harness routing; excessively small bending radii or interference with surrounding components (such as air conditioning pipes and coolant pipes) further exacerbate the risk of wear. Summary of the Invention

[0003] To address this, the present invention proposes a wiring harness support scheme that can simultaneously constrain high and low voltage wiring harnesses, optimize wiring harness routing, and avoid interference with air conditioning pipes.

[0004] To address the aforementioned technical problems, the present invention provides the following technical solution: A wire harness bracket, comprising: The bracket body is mounted to the front side of the engine housing via fastening components; A first limiting part and a second limiting part are detachably connected to the bracket body. The first limiting part is adapted to limit the low-voltage wire harness, and the second limiting part is adapted to limit the high-voltage wire harness. The first limiting part and the second limiting part are spaced apart along the height direction and are not on the same plane.

[0005] In some embodiments of the present invention, the bracket body is constructed as a bent plate, which includes a middle plate that is substantially parallel to the front side of the engine housing. The middle plate is provided with mounting holes, and the bracket body is mounted on the engine housing by fastening screws passing through the mounting holes.

[0006] In some embodiments of the present invention, the bracket body further includes a first bent portion formed in the middle region of the middle plate, the first bent portion being adapted to cooperate with the longitudinal ribs on the engine housing to form a positioning structure.

[0007] In some embodiments of the present invention, the first bent portion has a plate surface that is substantially perpendicular to the middle plate body, so as to abut against the longitudinal rib.

[0008] In some embodiments of the present invention, the support body further includes a second bent portion formed in the lower region of the middle plate, and the second limiting portion is connected to the second bent portion.

[0009] In some embodiments of the present invention, the second bending portion is constructed as an L-shaped bend, which includes a first plate having an angle with the middle plate and a second plate that is substantially parallel to the middle plate, and the second plate is provided with mounting holes for connecting with the second limiting portion.

[0010] In some embodiments of the present invention, the support body has two sets of second bending portions in the lower region of the middle plate, and the region where the two sets of second bending portions are connected to the middle plate is integrally constructed as a bending plate with a Z-shaped cross-section.

[0011] In some embodiments of the present invention, the support body further includes a third bent portion formed in the upper region of the middle plate, and the first limiting portion is connected to the third bent portion.

[0012] In some embodiments of the present invention, the third bending portion has a plate surface that is substantially perpendicular to the middle plate body, and the plate surface of the third bending portion is provided with mounting holes suitable for connection with the first limiting portion.

[0013] In some embodiments of the present invention, the first limiting part and the second limiting part each include a mounting body and a cable tie connected to the mounting body. The cable tie is adapted to cooperate with the wire harness. The mounting body of the first limiting part is inserted into the mounting hole of the third bending part, and the mounting body of the second limiting part is inserted into the mounting hole of the second bending part.

[0014] The present invention also provides an engine wiring harness assembly, including a low-voltage wiring harness, a high-voltage wiring harness, and a wiring harness bracket as described in any of the above embodiments, wherein the wiring harness bracket is fixedly connected to the front side of the engine housing.

[0015] In some embodiments of the present invention, the low-voltage wire harness located near the wire harness bracket is bent and extended along the upper side region of the middle plate and the surface of the third bend under the action of the first limiting part, and the high-voltage wire harness located near the wire harness bracket is extended in a generally horizontal direction under the action of the second limiting part.

[0016] The present invention also provides an engine assembly, including an engine and the engine wiring harness assembly described in any of the above embodiments.

[0017] In some embodiments of the present invention, the engine includes an engine housing, the engine housing including a first housing located in the engine body region and a second housing located in the gearbox region, the front side of the first housing being located in front of the front side of the second housing; The middle plate of the wire harness bracket is connected to the mounting portion on the front side of the second housing, and the third bent portion of the wire harness bracket extends toward the front side of the first housing.

[0018] The present invention also provides a vehicle comprising the engine assembly described in any of the above embodiments.

[0019] The technical solution of the present invention has the following technical effects compared with the prior art: In the wiring harness bracket provided by this invention, the bracket body is directly fixed to the front side of the engine housing, making the bracket rigidly connected to the engine and vibrating synchronously, thus avoiding the pulling and wear caused by relative movement when the wiring harness is fixed to the air conditioning pipe. The first and second limiting parts are detachably connected, facilitating replacement and pre-assembly as needed, reducing maintenance costs. The two types of limiting parts respectively constrain the low-voltage wiring harness and the high-voltage wiring harness, forcing physical separation and effectively reducing electromagnetic interference of the high-voltage wiring harness to the low-voltage signal. The two parts are spaced apart along the height direction and are not on the same plane, forming a three-dimensional misalignment in the vertical and front-back directions, further increasing the isolation, while avoiding assembly interference, decoupling the movement of the wiring harness during vibration, and significantly improving the fixation reliability and electromagnetic compatibility. Attached Figure Description

[0020] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which will help to understand the purpose and advantages of the present invention, wherein: Figure 1 A schematic diagram of the wiring harness bracket provided by the present invention installed in the engine compartment; Figure 2 A diagram showing the fit between the wiring harness bracket provided by this invention and the engine and high and low voltage wiring harnesses; Figure 3 A diagram showing the fit between the wiring harness bracket provided by this invention and the engine and low-voltage wiring harness; Figure 4 Another diagram showing the fit between the wiring harness bracket provided by the present invention and the engine and low-voltage wiring harness; Figure 5 This is a schematic diagram of the structure of the engine wiring harness assembly provided by the present invention; Figure 6 This is a schematic diagram of the engine assembly provided by the present invention inside the engine compartment. Detailed Implementation

[0021] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] Example 1 See attached document Figure 1-3 The diagram shows a wiring harness bracket provided by the present invention for securing an engine wiring harness. The bracket includes a bracket body 100, which is mounted to the front side of the engine housing 200 via fastening components 500. The front side of the engine housing 200 is relative to the vehicle's driving direction and is typically an area where engine accessories are concentrated. Installing the wiring harness bracket in this location facilitates a reasonable space allocation between the wiring harness and the piping of the air conditioning system A in the engine compartment. Specifically, the bracket body 100 is preferably integrally formed from a metal material (such as carbon steel, stainless steel, or aluminum alloy) using a stamping process. This ensures sufficient mechanical strength to withstand the weight of the wiring harness and dynamic loads under vibration. The fastening components 500 can take various forms, such as screws, bolts, and nuts. The number and position of the fastening components 500 are only necessary to ensure the reliable fixation of the bracket body 100 to the engine housing 200.

[0026] Specifically, a first limiting part 310 and a second limiting part 320 are detachably connected to the bracket body 100. The first limiting part 310 and the second limiting part 320 can be replaced according to different wiring harness specifications (such as high-voltage wiring harnesses 420 or low-voltage wiring harnesses 410 of different diameters), achieving modular configuration. When the limiting parts age or are damaged due to long-term use, they can be replaced individually without replacing the entire bracket body 100, reducing maintenance costs. The first limiting part 310 is used to limit the low-voltage wiring harness 410, and the second limiting part 320 is used to limit the high-voltage wiring harness 420. In the engine control system, the low-voltage wiring harness 410 is typically used to transmit sensor signals, actuator control signals, and power supply, with an operating voltage generally of 12V or 24V; the high-voltage wiring harness 420 is used to connect high-voltage components in the ignition system, high-pressure injectors, or hybrid power systems. Separating and limiting the two prevents the electromagnetic field generated by the high-voltage wiring harness 420 from causing electromagnetic interference to the low-voltage signal wiring harness, leading to sensor signal distortion or controller malfunction.

[0027] The first limiting part 310 and the second limiting part 320 are spaced apart along the height direction and are not on the same plane. The "height direction" refers to the vertical direction perpendicular to the front side of the engine housing 200, i.e., the direction from the bottom of the engine to the top. "Not on the same plane" means that the first limiting part 310 and the second limiting part 320 are located in different spatial planes, with a certain offset between them in the direction perpendicular to the front side of the engine housing 200 (i.e., the front-rear direction). This spatial arrangement design increases the spatial distance and spatial isolation between the high-voltage wiring harness 420 and the low-voltage wiring harness 410, effectively reducing the electromagnetic coupling effect of the high-voltage wiring harness 420 on the low-voltage wiring harness 410. Compared with a simple horizontal side-by-side arrangement, this staggered arrangement can achieve a larger equivalent spatial distance within a limited space. Furthermore, the engine generates complex vibrations during operation, including torsional vibration along the crankshaft axis, bending vibration perpendicular to the crankshaft axis, and lateral vibration along the cylinder arrangement direction. As a flexible component connecting various electrical parts on an engine, the position and orientation of the constraint points of the wiring harness directly affect the stress state of the wiring harness under vibration. By arranging the two limiting parts at intervals along the height direction, the constraint points of the low-voltage wiring harness 410 and the high-voltage wiring harness 420 have different spatial coordinates, which can prevent the two wiring harness systems from pulling on each other during vibration.

[0028] Specifically, the bracket body 100 is constructed as a bent plate, including a central plate 110 that is substantially parallel to the front side of the engine housing 200. "Substantially parallel" means that the surface of the central plate 110 is approximately flush with the corresponding mounting area on the front side of the engine housing 200, or the angle between the plate surfaces is small, for example, less than 5 degrees. This makes the connection between the bracket body 100 and the engine housing 200 more secure, ensures that the axis of the fastening components (such as screws) is perpendicular to the contact surface, and allows for even distribution of fastening force, facilitating assembly.

[0029] Specifically, the central plate 110 is provided with mounting holes. These mounting holes can be round or oblong (elongated oval). The oblong design provides a certain adjustment margin, compensating for dimensional tolerances that arise between the bracket body 100 and the engine housing 200 during manufacturing. In actual production, the threaded holes on the engine housing 200 have a certain positional tolerance, and the mounting holes on the bracket body 100 also have corresponding dimensional tolerances. By using oblong holes, the position of the bracket body 100 can be appropriately adjusted during installation to ensure that the first limiting part 310 and the second limiting part 320 are accurately positioned in the required spatial location. The bracket body 100 is mounted to the engine housing 200 using fastening screws passing through the mounting holes.

[0030] In this embodiment, such as Figure 3 As shown, the bracket body 100 also includes a first bent portion 120 formed in the central region of the central plate 110. The "central region" referred to here is relative to the upper and lower edges of the central plate 110, and is approximately located at the middle of the height direction of the central plate 110. This first bent portion 120 is designed to mate with longitudinal ribs 210 on the engine housing 200 to form a positioning structure. The engine housing 200, particularly on the front side of the transmission area, typically has several longitudinal ribs 210 (or reinforcing ribs) to increase rigidity and reduce weight. These ribs extend along the height direction of the engine housing 200 and are integrally formed during casting. Utilizing these existing longitudinal ribs 210 as positioning references, precise positioning of the wiring harness bracket on the engine housing 200 is achieved.

[0031] Specifically, the first bend 120 has a plate surface that is substantially perpendicular to the middle plate 110. This substantially perpendicular plate surface is formed by a single bend starting from the plate surface of the middle plate 110. When the bracket body 100 is installed onto the engine housing 200, this perpendicular plate surface abuts against the side of the longitudinal rib 210 on the engine housing 200. This abutment relationship forms a mechanical positioning. During assembly, the operator holds the bracket body 100 against the front side of the engine housing 200, so that the perpendicular plate surface of the first bend 120 contacts the side of the longitudinal rib 210, at which point the horizontal position of the bracket body 100 is uniquely determined. Then, the operator rotates the bracket body 100 so that its mounting hole aligns with the threaded hole on the engine housing 200. Since the positioning structure has restricted the rotational freedom of the bracket body 100, the alignment between the mounting hole and the threaded hole becomes very easy. This pre-positioning, then-tightening assembly method allows a single operator to complete the installation of the wiring harness bracket without the need for auxiliary clamps or additional personnel to maintain its position, significantly improving assembly efficiency. During bolt tightening, if the bracket body 100 lacks a positioning structure, the frictional force generated by the tightening torque may not be sufficient to completely prevent minor slippage of the bracket body 100, especially when the bolts are just beginning to tighten and the preload has not yet been fully established. This slippage may cause the wiring harness bracket to be misaligned relative to the engine housing, resulting in a wiring harness guide position that does not match the pre-design after the bracket is installed. Furthermore, in the vibrating environment of long-term engine operation, the fastening screws may loosen slightly due to vibration, leading to a decrease in preload. Without a positioning structure, once the preload decreases to an insufficient level to overcome the lateral force generated by wiring harness vibration, the bracket body 100 may experience fretting wear relative to the engine housing 200, further accelerating the loosening of the fastening screws. In this embodiment, the positioning structure continuously bears the lateral load. Even if the preload of the fastening screw decreases, the spatial position of the bracket body 100 can be maintained. This redundant design greatly improves the reliability of the wire harness bracket in a vibration environment.

[0032] Furthermore, the contact between the vertical plate surface of the first bend 120 and the longitudinal rib 210 can be a surface contact. To achieve better positioning, the width and height of the vertical plate surface can be optimized according to the dimensions of the longitudinal rib 210, so that it can smoothly engage with the longitudinal rib 210 during assembly. In a typical design, the side of the longitudinal rib 210 is flat, and the vertical plate surface of the first bend 120 is also flat, forming a planar contact that results in high positioning accuracy and low contact stress. In another design, the side of the longitudinal rib 210 may have a draft angle (required by the casting process). In this case, the vertical plate surface of the first bend 120 can be set with the same draft angle, or designed with a smaller contact area to reduce sensitivity to the draft angle.

[0033] Specifically, such as Figure 3 As shown, the bracket body 100 further includes a second bent portion 130 formed in the lower region of the central plate 110, and a second limiting portion 320 is connected to the second bent portion 130. The second bent portion 130 is adapted to be fixedly connected to the high-voltage wiring harness 420.

[0034] In the engine system, the high-voltage wiring harness 420 is typically used to connect components such as ignition coils, spark plugs, high-pressure fuel injectors, and high-pressure fuel pumps. These components are usually located near the cylinder head and the sides of the cylinder block. The routing of the high-voltage wiring harness 420 needs to avoid high-temperature areas (such as the exhaust manifold and turbocharger) and moving parts (such as belts and fans). By placing the second limiting part 320 in the lower region of the middle plate 110, the high-voltage wiring harness 420 can pass under the bracket body 100 and run along the lower middle part of the engine housing 200. This path is generally safer and away from the high-temperature areas of the upper exhaust system.

[0035] The specific shape of the second bend 130 can be designed according to the spatial requirements of the high-voltage wiring harness 420. In a simple design, the second bend 130 can be a cantilever plate formed by bending forward (i.e., away from the engine housing 200) from the lower edge of the middle plate 110, with the second restraint 320 directly mounted on this cantilever plate. The advantage of this structure is its simplicity and low material consumption, but the stiffness of the cantilever plate is limited, and it may produce large deflections under large vibration loads. To improve stiffness, the second bend 130 can adopt a more complex shape, increasing the bending section modulus by changing the cross-sectional shape, thereby improving stiffness without increasing the plate thickness.

[0036] like Figure 3 As shown, the second bend 130 extends along the left / right edge of the lower region of the central plate 110. Specifically, the second bend 130 is constructed as an L-shaped bend, comprising a first plate 131 having an angle with the central plate 110 and a second plate 132 substantially parallel to the central plate 110. The second plate 132 has mounting holes for connecting with the second limiting part 320. The angle between the first plate 131 and the central plate 110 can be acute, right, or obtuse, but is most commonly right. The first plate 131 extends along the edge of the central plate 110, its function being to push the second plate 132 forward (away from the engine housing 200) a certain distance, providing sufficient space for the second limiting part 320 and the high-voltage wiring harness 420 fixed thereto. Since the high-voltage wiring harness 420 is relatively thicker than the low-voltage wiring harness 410 and has a certain diameter, setting the second plate 132 at a predetermined distance from the front side of the engine housing 200 can prevent the high-voltage wiring harness 420 from rubbing against the surface of the engine housing 200.

[0037] The second plate body 132 is substantially parallel to the middle plate body 110. After the second limiting part 320 is installed on the second plate body 132, the direction of the constrained wire harness is also consistent with the direction of the middle plate body 110, facilitating the unified planning of the wire harness routing. Again, the substantially parallel design makes the stress distribution on the second plate body 132 relatively uniform, avoiding stress concentration caused by skew.

[0038] The mounting holes provided on the second plate body 132 are used to connect with the second limiting part 320. The form of the mounting holes can be round holes, square holes, special-shaped holes, etc., depending on the connection method of the second limiting part 320. In a preferred design, the mounting holes are rectangular holes, and the second limiting part 320 is provided with corresponding elastic clamping feet. The second limiting part 320 can be installed on the second plate body 132 by pressing and inserting, without the use of tools, achieving rapid assembly. This quick-insert structure is widely used in the fixation of automotive wire harnesses, with high installation efficiency, no need for additional fasteners, and convenient disassembly.

[0039] As Figure 2 、 Figure 3 shown, the bracket body 100 is provided with two groups of second bending parts 130 in the lower side area of the middle plate body 110. The overall structure of the area where these two groups of second bending parts 130 are connected to the middle plate body 110 is a bending plate with a cross-section in the shape of a "ji" character. The so-called "ji" character cross-section means that the lower side area of the middle plate body 110 forms a cross-section shape similar to the Chinese character "ji" through the L-shaped bending parts on its left and right sides. Specifically, starting from the main plane of the middle plate body 110, it is first bent forward (relative to the front side of the engine housing) by a certain height to form a transition plane (the plate surface of the first plate body 131), and then bent in a direction perpendicular to the transition plane to form another plane. The continuous bending structure formed in this way presents a "ji" character in cross-section. The "ji" character cross-section greatly improves the bending stiffness and torsional stiffness of the lower side area of the middle plate body 110. The "ji" character cross-section distributes the material away from the neutral axis, obtaining a large moment of inertia with less material, which means that the spatial position of the wire harness fixing point is more stable in a vibration environment, and the wire harness will not generate additional displacement due to the deformation of the bracket body 100. The distance between the two groups of bending parts can be designed according to specific requirements, providing multiple wire harness fixing points in a limited space. The "ji" character cross-section can be formed by continuous die stamping, and the forming of a complex cross-section can be completed in one stamping stroke, with high production efficiency.

[0040] As Figure 4As shown, the bracket body 100 also includes a third bent portion 140 formed in the upper region of the middle plate 110, and the first limiting portion 310 is connected to the third bent portion 140. Corresponding to the aforementioned second bent portion 130, the third bent portion 140 is located in the upper region of the middle plate 110 and is mainly used to install the first limiting portion 310 to constrain the low-voltage wiring harness 410.

[0041] In the engine system, the low-voltage wiring harness 410 typically connects various sensors (such as crankshaft position sensors, camshaft position sensors, knock sensors, coolant temperature sensors, etc.) and actuators (such as idle speed control valves, variable valve timing control valves, etc.). These sensors and actuators are mostly located in the upper areas of the engine cylinder head, intake manifold, throttle body, etc. Therefore, by placing the first limiting part 310 in the upper area of ​​the bracket body 100, the low-voltage wiring harness 410 can reach these sensors and actuators via the shortest path, avoiding redundant bending and excessive wiring, thus reducing the weight and cost of the wiring harness, while simultaneously improving the reliability of signal transmission.

[0042] The function of the third bend 140 is to support the first limiting part 310 in a suitable position, allowing the low-voltage wiring harness 410 to avoid these components in its routing, while maintaining a sufficient distance from the high-voltage wiring harness 420. Therefore, the specific shape of the third bend 140 needs to be determined based on the routing of the low-voltage wiring harness 410 and the layout of the surrounding accessories. In this embodiment, the third bend 140 is further defined as having a plate surface that is substantially perpendicular to the middle plate 110, and this perpendicular plate surface is provided with mounting holes suitable for connection with the first limiting part 310. The plate surface that is substantially perpendicular to the middle plate 110 means that the mounting plane of the first limiting part 310 is perpendicular to the plane of the middle plate 110, that is, the constraint direction of the first limiting part 310 is different from the constraint direction of the second limiting part 320 (the mounting plane of the second limiting part 320 is usually parallel to the middle plate 110). When the engine vibrates, the two wiring harness systems move along their respective constraint directions, and the possibility of mutual interference is small.

[0043] When the first limiting part 310 constrains the low-voltage wiring harness 410, the wiring harness can extend in a generally horizontal direction and be guided by the third bending part 140. Specifically, after the low-voltage wiring harness 410 enters the first limiting part 310 along the middle plate 110 of the bracket body 100, it can extend along the plate surface of the third bending part 140. This guiding effect allows the bending radius of the wiring harness to be controlled within a reasonable range, avoiding breakage of internal wires or damage to the insulation layer due to excessive bending.

[0044] Specifically, the first limiting part 310 and the second limiting part 320 each include a mounting body 301 and a cable tie 302 connected to the mounting body 301. The cable tie 302 is adapted to cooperate with the wire harness. The mounting body 301 of the first limiting part 310 is inserted into the mounting hole of the third bend 140, and the mounting body 301 of the second limiting part 320 is inserted into the mounting hole of the second bend 130. The above-mentioned limiting part structure is a relatively mature technical solution in automotive wire harness fixing. The cable tie 302 is usually injection molded from engineering plastics such as nylon 66, which has good flexibility and sufficient strength. One end of the cable tie 302 is connected to the mounting body 301, and the other end is a slender strip with unidirectional serrations. In use, the strip is wrapped around the wire harness and then inserted into the locking hole on the mounting body 301. The serrations engage with the locking tongue in the locking hole to form an irreversible locking ring, which firmly restrains the wire harness to the mounting body 301. The mounting body 301 is equipped with elastic locking feet. These elastic locking feet typically consist of two or more elastically deformable cantilever arms, each with barbs at its end. When the mounting body 301 is inserted into the mounting hole, the barbs are pressed against the edge of the hole, forcing the cantilever arms to elastically deform inward. Once the mounting body 301 is fully inserted, the barbs cross the edge of the mounting hole, the cantilever arms return to their original shape, and the barbs hook onto the back of the mounting hole, thus locking the connection. This plug-in connection requires only aligning the limiting part with the mounting hole and pressing down until a "click" is heard, indicating proper installation without any tools. For disassembly, a flathead screwdriver or a special tool can be used to press down on the elastic locking feet to pull out the limiting part, facilitating replacement or maintenance.

[0045] The mounting body 301 and the cable tie 302 can be connected by integral injection molding, meaning that the mounting body 301 and the cable tie 302 are an inseparable single part. This integral structure has advantages such as fewer parts, no assembly required, and high reliability. The shape of the mounting body 301 needs to match the mounting holes on the bracket body 100 to achieve a plug-in connection.

[0046] To accommodate the fixing requirements of different wire harnesses, the first limiting part 310 and the second limiting part 320 can use cable ties 302 of different sizes. For example, high-voltage wire harnesses 420 are typically thicker in diameter and may have internal shielding and thicker insulation layers, requiring larger and stronger cable ties 302; low-voltage wire harnesses 410 are thinner in diameter and can use smaller cable ties 302. However, the dimensions of the mounting bodies 301 should be uniform, that is, the mounting bodies 301 of the first limiting part 310 and the second limiting part 320 should have the same plug-in interface size to facilitate interchangeability and universal design. Of course, if space and strength requirements differ, different mounting bodies 301 and matching mounting holes can also be designed.

[0047] Example 2 This embodiment provides an engine wiring harness assembly, such as Figure 6 As shown, the engine wiring harness assembly includes a low-voltage wiring harness 410, a high-voltage wiring harness 420, and a wiring harness bracket as described in any of the aforementioned embodiments. The wiring harness bracket is fixedly connected to the front side of the engine housing 200.

[0048] The engine wiring harness assembly is a functional unit that is assembled independently of the engine body. Specifically, after the engine body is installed, the wiring harness bracket is mounted onto the engine housing 200. Then, the low-voltage wiring harness 410 and the high-voltage wiring harness 420 are respectively fixed to the first limiting part 310 and the second limiting part 320 of the wiring harness bracket. Since the structure of the wiring harness bracket is fixed, the fixed position and direction of the wiring harness on the bracket are also determined. This ensures that the wiring harness of each engine is consistent, avoiding wiring quality problems caused by differences in manual operation.

[0049] The low-voltage wiring harness 410 and high-voltage wiring harness 420 in the wiring harness assembly are not simply arbitrary cables, but specialized wiring harnesses designed and manufactured according to the specific electrical configuration of the engine. The low-voltage wiring harness 410 contains various wires of different diameters and colors, used for signal transmission and power supply for different functions. Terminals are crimped to both ends of the wires, and these terminals are inserted into corresponding plastic sheaths (connectors) for connection to sensors, actuators, or control units. The high-voltage wiring harness 420 typically uses specialized high-voltage and high-temperature resistant cables, with high-voltage connectors at both ends.

[0050] Specifically, this embodiment optimizes the extension path of the wire harness in the wire harness assembly. The low-voltage wire harness 410, located near the wire harness bracket, extends along the upper region of the central plate 110 and the surface of the third bending portion 140 under the action of the first limiting part 310. The high-voltage wire harness 420, located near the wire harness bracket, extends in a generally horizontal direction under the action of the second limiting part 320.

[0051] Example 3 This embodiment provides an engine assembly. The engine assembly includes an engine and the engine wiring harness assembly described in Embodiment 2.

[0052] Specifically, such as Figure 5 As shown, the engine housing 200 includes a first housing 201 located in the engine body region and a second housing 202 located in the gearbox region. The front side of the first housing 201 is located in front of the front side of the second housing 202. The middle plate 110 of the wiring harness bracket is connected to the mounting portion on the front side of the second housing 202, and the third bend 140 extends toward the front side of the first housing 201. The wiring harness bracket utilizes this stepped space, transforming it into an effective area for wiring harness fixation.

[0053] Specifically, the engine assembly also includes an engine control unit (ECU) 203, which is located in the upper region of the engine housing 200. The front side of the ECU unit 203 has a first connector 203a and a second connector 203b suitable for connection to a low-voltage wiring harness 410. The first connector 203a is located near the first housing 201 (engine body), and the second connector 203b is located near the second housing 202 (transmission). The low-voltage wiring harness 410 has a first connector 410a and a second connector 410b, with the first connector 410a plugged into the first connector 203a and the second connector 410b plugged into the second connector 203b. The upper side of the ECU unit 203 has a third connector (not shown) suitable for connection to a high-voltage wiring harness 420, which also has a third connector (not shown) plugged into the third connector.

[0054] The low-voltage sub-harness with the first connector 410a extends upward from the upper bend of the harness bracket, reaching the front side of the ECU via the shortest path. Since the first connector 203a is close to the first housing 201 (engine body), and the engine body has a large number of sensors (such as crankshaft position sensor, camshaft position sensor, knock sensor, coolant temperature sensor, etc.) that are widely distributed, this branch requires a larger connector or a greater number of terminals. Positioning the first connector 203a on the front side near the first housing 201 allows the branch harness to be plugged in without extensive lateral movement after detaching from the bracket, resulting in a short and direct path.

[0055] The low-voltage sub-harness with the second connector 410b extends laterally along the front surface of the middle plate 110 of the harness bracket, then merges with the low-voltage sub-harness with the first connector 410a at the upper bend of the bracket and extends along the surface of the third bend 140. The second connector 203b corresponding to this branch is located on the front side of the ECU in the area near the second housing 202 (transmission).

[0056] Two sets of low-voltage connectors are connected to their respective interfaces, achieving a one-to-one correspondence between the wiring harness branches and the ECU interface. The design of two independent interfaces minimizes the length of each branch wiring harness, resulting in smaller connector sizes, easier plugging and unplugging, and allowing for independent disconnection and repair of a faulty branch without affecting the normal operation of the other branch.

[0057] The high-voltage wiring harness 420 originates from the second limiting part 320 of the wiring harness bracket, extends horizontally, and after reaching the vicinity of the ECU unit 203, needs to be bent upwards and connect to the third connector on the upper side of the ECU. This upward bend can utilize other guiding structures on the engine housing 200 (such as wiring harness slots) to control the bending radius, ensuring that the internal structure of the high-voltage wiring harness 420 is not damaged. Since the high-voltage wiring harness 420 mainly extends horizontally in the lower middle part of the engine housing 200, while the branches of the low-voltage wiring harness 410 are mainly concentrated on the upper side of the bracket and the front side of the ECU, the two are spatially separated, resulting in a low risk of electromagnetic interference.

[0058] Example 4 This embodiment provides a specific implementation of a vehicle, including the engine assembly described in the preceding embodiments. Here, "vehicle" refers to any means of transportation that uses an engine as a power source, including but not limited to passenger cars, commercial vehicles, construction machinery vehicles, and agricultural machinery vehicles. Applying the aforementioned wiring harness bracket and its related wiring harness assembly and engine assembly to a vehicle significantly improves the overall vehicle's reliability, durability, and electromagnetic compatibility.

[0059] From a reliability perspective, because the wiring harness bracket adopts an anti-rotation positioning design and the bracket body 100 is installed in the gearbox area where vibration is relatively small, the relative displacement of the wiring harness fixing point is small, and the fretting wear between the wiring harness and the limiting part is effectively controlled.

[0060] From a durability perspective, the bending plate structure design of the wiring harness bracket fully considers fatigue life. Through a reasonable bending radius and structural layout, the bracket body 100 will not develop fatigue cracks under the long-term vibration environment of the engine.

[0061] From an electromagnetic compatibility perspective, the low-voltage harness 410 and the high-voltage harness 420 are spatially separated and not in the same plane. Furthermore, the low-voltage harness 410 adopts a branch-merging path to effectively control the total length and clutter of the harness, thereby effectively reducing conducted and radiated interference.

[0062] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A wire harness bracket, characterized in that, include: The bracket body is mounted to the front side of the engine housing via fastening components; A first limiting part and a second limiting part are detachably connected to the bracket body. The first limiting part is adapted to limit the low-voltage wire harness, and the second limiting part is adapted to limit the high-voltage wire harness. The first limiting part and the second limiting part are spaced apart along the height direction and are not on the same plane.

2. A wire harness bracket according to claim 1, characterized in that, The bracket body is constructed as a bent plate, which includes a middle plate that is substantially parallel to the front side of the engine housing. The middle plate has mounting holes, and the bracket body is mounted on the engine housing by fastening screws that pass through the mounting holes.

3. A wire harness bracket according to claim 2, characterized in that, The bracket body also includes a first bent portion formed in the middle region of the middle plate, the first bent portion being adapted to cooperate with the longitudinal ribs on the engine housing to form a positioning structure.

4. A wire harness bracket according to claim 3, characterized in that, The first bend has a plate surface that is substantially perpendicular to the middle plate body, so as to abut against the longitudinal rib.

5. A wire harness bracket according to claim 2 or 3, characterized in that, The support body also includes a second bent portion formed in the lower region of the middle plate, and the second limiting portion is connected to the second bent portion.

6. A wire harness bracket according to claim 5, characterized in that, The second bending section is constructed as an L-shaped bend, which includes a first plate having an angle with the middle plate and a second plate that is substantially parallel to the middle plate. The second plate is provided with mounting holes for connecting with the second limiting section.

7. A wire harness bracket according to claim 6, characterized in that, The support body has two sets of second bending sections on the lower side of the middle plate. The area where the two sets of second bending sections connect with the middle plate is constructed as a bending plate with a Z-shaped cross-section.

8. A wire harness bracket according to claim 5, characterized in that, The support body also includes a third bent portion formed in the upper region of the middle plate, and the first limiting portion is connected to the third bent portion.

9. A wire harness bracket according to claim 8, characterized in that, The third bend has a plate surface that is substantially perpendicular to the middle plate, and the plate surface of the third bend is provided with mounting holes suitable for connection with the first limiting part.

10. A wire harness bracket according to claim 9, characterized in that, The first limiting part and the second limiting part each include a mounting body and a cable tie connected to the mounting body. The cable tie is adapted to cooperate with the wire harness. The mounting body of the first limiting part is inserted into the mounting hole of the third bending part, and the mounting body of the second limiting part is inserted into the mounting hole of the second bending part.

11. An engine wiring harness assembly, characterized in that, It includes a low-voltage wiring harness, a high-voltage wiring harness, and a wiring harness bracket as described in any one of claims 1-10, wherein the wiring harness bracket is fixedly connected to the front side of the engine housing.

12. An engine wiring harness assembly according to claim 11, characterized in that, The low-voltage wire harness located near the wire harness bracket extends along the upper side region of the middle plate and the surface of the third bend under the action of the first limiting part, while the high-voltage wire harness located near the wire harness bracket extends in a generally horizontal direction under the action of the second limiting part.

13. An engine assembly, characterized in that, Includes an engine and the engine wiring harness assembly as described in claim 11 or 12.

14. An engine assembly according to claim 13, characterized in that, The engine includes an engine housing, which includes a first housing located in the engine body region and a second housing located in the gearbox region, with the front side of the first housing located in front of the front side of the second housing. The middle plate of the wire harness bracket is connected to the mounting portion on the front side of the second housing, and the third bent portion of the wire harness bracket extends toward the front side of the first housing.

15. A vehicle, characterized in that, Includes the engine assembly as described in claim 13 or 14.

Images