An accessory mounting unit for a general-purpose engine

Abstract

The utility model discloses an attachment mounting unit of general engine, including engine body, fuel pump to set up the wind scooper body on engine body, the fuel pump is used for guiding the fuel from the engine body outside to the fuel consumption unit of engine body, be provided with the assembly rib on the wind scooper body, the fuel pump is installed on the wind scooper body through assembly rib, be provided with reinforcing member on the assembly rib for increasing the strength and rigidity of assembly rib. Advantageous effect lies in: the attachment can reduce the heat influence of engine heat, noise to the attachment through the assembly rib installation on the wind scooper body, ensures the reliable operation of attachment, in addition, through special assembly rib and reinforcing member fixed, improved the reliability of assembly, can even the weight and vibration load of attachment be transmitted to the overall frame of wind scooper body simultaneously, avoids the accelerated cracking, deformation under the complex environment, thereby ensures the stable operation of engine under the complex environment.

Description

Technical Field

[0001] This utility model relates to the field of general engine technology, specifically to an accessory mounting unit for a general engine. Background Technology

[0002] A general-purpose engine is not an isolated component that operates independently. Its normal operation, performance output, safety protection, and the realization of the vehicle's functions all depend on the coordinated cooperation of various engine accessories. These accessories may seem like auxiliary components, but they are actually key support units for the engine and even the entire vehicle's power system. Therefore, the stability of these accessories directly determines the overall performance, reliability, and operational safety of the engine.

[0003] For example, Chinese patent document CN218953465U discloses a technical solution for a general-purpose engine, including an engine block and a throttle valve body, and also including a feed pipe for connecting to a fuel tank. The feed pipe is connected to the throttle valve body via a fuel pump, the fuel pump is connected to the engine block, the fuel pump's inlet is connected to the feed pipe, and the fuel pump's outlet is connected to the throttle valve body. Specifically, the fuel pump housing has a connecting part, and the fuel pump is connected to the engine block through the connecting part. A negative pressure pump is provided on the feed pipe, and the negative pressure pump and the fuel pump are located on the same side of the engine block. In this embodiment, connecting parts are respectively provided on the left and right sides of the fuel pump housing, and the connecting parts are connected to the engine block by bolts.

[0004] For example, Chinese patent document CN113825899B discloses an internal combustion engine comprising: a first fuel pump that draws fuel via a fuel filter; and a second fuel pump that supplies the fuel to a fuel injection device. The internal combustion engine is characterized by: a first fuel line connecting the fuel filter to the first fuel pump and the second fuel pump, wherein the second fuel pump is set to a high pressure compared to the pressure of the first fuel pump; and a second fuel line connecting the second fuel pump to the fuel injection device, which injects fuel into a combustion chamber formed in the cylinder section of the internal combustion engine. A shielding wall covering the exterior of the cylinder section is provided between at least a portion of the second fuel line and the cylinder section, the shielding wall having at least a holding portion that retains the first fuel line and the second fuel line. The first fuel pump, for example, is a mechanical pump (diaphragm pump) that transmits pressure changes in the cylinder section (first cylinder and second cylinder) caused by the up-and-down movement of the piston in the internal combustion engine to the first fuel pump LP1 via a diaphragm conduit. The first fuel pump is driven based on the pulses of the transmitted pressure changes.

[0005] The two solutions mentioned above address the spatial layout and installation of common engine accessories (negative pressure pumps, fuel pumps, etc.), which can shorten the fuel supply path, reduce the risk of pipeline damage, and decrease fuel vapor emissions to some extent. They also address the problem of engine failure caused by vapor lock by avoiding the influence of engine heat. However, they still suffer from engine instability in complex environments. Utility Model Content

[0006] The purpose of this utility model is to provide a universal engine accessory installation unit that ensures stable engine operation in complex environments by improving the reliability of accessory installation and operation.

[0007] To achieve the above objectives, the basic solution of this utility model provides a universal engine accessory mounting unit, including an engine body and accessories, as well as a wind deflector body disposed on the engine body; the wind deflector body is provided with mounting ribs for mounting the accessories; the mounting ribs are provided with reinforcing members for improving the installation strength and rigidity of the mounting ribs.

[0008] The beneficial effects of this basic solution are as follows: installing the accessories on the air guide cover using assembly ribs can reduce the thermal impact of engine heat and noise on the accessories, ensuring reliable operation of the accessories; in addition, the reliability of assembly is improved by fixing with special assembly ribs and reinforcing parts, while the weight and vibration load of the accessories can be evenly transferred to the overall frame of the air guide cover, avoiding accelerated cracking and deformation caused by complex environments; thus ensuring stable operation of the engine in complex environments.

[0009] Preferably, the assembly rib and the reinforcing member are separate components. This achieves vibration-resistant fixation of the accessories, thereby ensuring the safety and reliability of the assembly.

[0010] Preferably, the assembly rib is provided with a mounting portion, and a first mounting hole is formed in the mounting portion. This facilitates the installation and fixing of accessories.

[0011] Preferably, the mounting portion is a tongue-shaped or plate-shaped structure, with one end connected to the air guide cover and the other end extending obliquely inward or outward towards the air guide cover to form an extension portion, and the first mounting hole is provided on the extension portion. The oblique slope design allows the reinforcing member to more easily mate with the mounting portion, ensuring the convenience and reliability of assembly.

[0012] Preferably, the reinforcing member is a clamping member with two clamping parts, each clamping part having a second mounting hole. When the extension is clamped precisely between the two clamping parts, the first mounting hole and the second mounting hole are coaxial. This maximizes the strength and rigidity of the accessory installation, avoiding engine instability or failure caused by accelerated cracking or deformation under complex environments.

[0013] Preferably, there are two mounting parts, spaced apart from each other. Increasing the mounting area can fundamentally reduce the risk of connection failure, especially in complex environments, minimizing stress concentration, enhancing vibration / impact resistance, reducing loosening, and ensuring safe and reliable installation of accessories.

[0014] Preferably, the air guide cover and the mounting part are an integral structure. Besides facilitating processing, this reduces assembly interface connections, lowers assembly errors, eliminates potential failure points such as loosening and corrosion, and increases installation reliability.

[0015] Preferably, the air guide cover includes an air inlet surface and sidewalls arranged circumferentially around the air inlet surface.

[0016] Preferably, the assembly rib is disposed on the side wall of the air guide cover.

[0017] Preferably, the accessories may include one or more of the following: fuel pump 2, oil pump, relay, enrichment pump, generator start / stop switch, etc.

[0018] This utility model has the following beneficial effects: 1. By optimizing the installation layout, the thermal impact of the engine on the accessories is minimized, ensuring stable operation of the accessories; in addition, the clever design of assembly ribs and reinforcing parts avoids stress concentration and enhances the stability and reliability of the installation, thereby ensuring stable engine operation in complex environments.

[0019] 2. Streamlining assembly components and rationally arranging assembly space can further improve the convenience of installation and maintenance, and save costs. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of the air guide cover, assembly ribs, and reinforcing members of Embodiment 1 of this utility model.

[0021] Figure 2 for Figure 1 AA sectional view.

[0022] Figure 3 for Figure 2 A magnified view of a portion of the image.

[0023] Figure 4 This is a schematic diagram of the assembly structure of Embodiment 1 of this utility model. Detailed Implementation

[0024] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: 1-engine body, 2-fuel pump, 3-air duct, 4-assembly rib, 41-mounting part, 5-reinforcing member.

[0025] The accessory mounting unit for a general-purpose engine provided in this embodiment includes an engine body 1 and accessories, as well as a wind deflector 3 disposed on the engine body 1; the wind deflector 3 is provided with mounting ribs 4 for mounting accessories; the mounting ribs 4 are provided with reinforcing members 5 for improving the installation strength and rigidity of the mounting ribs 4.

[0026] Even better, the assembly rib 4 and the reinforcing member 5 are set up separately.

[0027] Even better, the assembly rib 4 is provided with a mounting part 41, and a first mounting hole is opened on the mounting part 41.

[0028] Even better, the mounting part 41 is a tongue-shaped or sheet-shaped structure, with one end connected to the air guide cover 3 and the other end extending obliquely in the direction of the air guide cover 3 to the inside or outside to form an extension, and the first mounting hole is provided on the extension.

[0029] Even better, the reinforcing member 5 is a clamping member with two clamping parts, each clamping part having a second mounting hole. When the extension is clamped exactly between the two clamping parts, the first mounting hole and the second mounting hole are exactly coaxial.

[0030] Better still, there are two mounting parts 41, and the two mounting parts 41 are arranged at an interval.

[0031] Even better, the air guide cover 3 and the mounting part 41 are an integrated structure.

[0032] Even better, the air guide shroud 3 includes an air inlet surface and side walls arranged circumferentially around the air inlet surface.

[0033] Even better, the assembly rib 4 is set on the side wall of the air guide cover 3.

[0034] Even better, the accessories may include one or more of the following: fuel pump 2, oil pump, relay, enrichment pump, generator start / stop switch, etc.

[0035] Better still, in this embodiment, the assembly rib 4 can be configured as an assembly protrusion, including at least one protrusion, on which a first mounting hole is provided; the reinforcing member 5 can preferably be a clip nut, and more preferably a clip-type nut, when the clip-type nut can be clamped on the protrusion, the threaded hole of the clip-type nut is coaxial with the first mounting hole.

[0036] The basic implementation examples are as follows: Figure 1-4 As shown: The accessory mounting unit for a general-purpose engine provided in this embodiment will be further described using the fuel pump 2 as an example. The mounting unit consists of an engine block 1, a fuel pump 2, and a shroud 3. The shroud 3 is located at the end of the engine block 1. The shroud 3 generally consists of a guide surface and side walls arranged circumferentially around the guide surface. Preferably, the side walls can also guide or intake air, and can be adjusted and set according to actual needs.

[0037] A mounting rib 4 is provided on the air guide shroud 3, and the fuel pump 2 is mounted on the air guide shroud 3 via the mounting rib 4; wherein, the mounting rib 4 is preferably strip-shaped to facilitate quick installation and positioning of the fuel pump 2. Preferably, the mounting rib 4 is located on the side wall of the air guide shroud 3.

[0038] In this embodiment, the assembly rib 4 is composed of an installation part 41, wherein there are two installation parts 41 arranged separately; and preferably, the air guide cover 3 and the installation part 41 are an integral structure, which reduces the number of assembly parts and improves the convenience of installation and maintenance as well as the stability of installation.

[0039] In addition, a reinforcing member 5 is provided on the assembly rib 4 to increase the strength and rigidity of the assembly rib 4. Of course, the assembly rib 4 and the reinforcing member 5 are separate components.

[0040] In this embodiment, the mounting part 41 is tongue-shaped, with one end connected to the air guide cover 3 and the other end extending obliquely into the air guide cover 3 to form an extension. The first mounting hole is provided on the extension, and one or more first mounting holes can be provided.

[0041] The reinforcing member 5 provided in this embodiment is a clamping member with two clamping parts. Each clamping part has a second mounting hole. When the extension is clamped in the middle of the two clamping parts, the first mounting hole and the second mounting hole are coaxial.

[0042] Preferably, the extension length of the second mounting hole located inside the mounting portion 41 is greater than the extension length of the second mounting hole located outside the mounting portion 41.

[0043] Of course, more preferably, the second mounting hole located on the outer side of the mounting part 41 is merely a clearance through hole, without any mounting structure, and is installed solely by the first mounting hole of the mounting part 41 and the second mounting hole on the inner side of the mounting part 41 in conjunction with the mounting hole of the fuel pump 2. In this case, the diameter of the second mounting hole located on the outer side of the mounting part 41 can be larger than that of the second mounting hole on the inner side of the mounting part 41.

[0044] Alternatively, neither the second mounting hole on the outside of the mounting part 41 nor the first mounting hole of the mounting part 41 may have a mounting structure. Instead, the second mounting hole on the inside of the mounting part 41 may be used in conjunction with the mounting hole of the fuel pump 2 for installation.

[0045] Even better, the bottom of the groove is designed to be an outward-convex arc.

[0046] The specific implementation process is as follows: When assembling the fuel pump 2 onto the engine block 1, first clamp the two reinforcing members 5 onto the two mounting parts 41 respectively, and then lock (or tighten) the fasteners after passing through the second mounting hole inside the mounting part 41, the first mounting hole of the mounting part 41, the second mounting hole outside the mounting part 41, and the mounting hole of the fuel pump 2 in sequence, thus completing the assembly of the fuel pump 2.

[0047] In summary, other structures or components included in the appendix, such as oil pumps, relays, enrichment pumps, generator start-stop switches, etc., can be installed with reference to the installation method of fuel pump 2 described above.

[0048] The above description is merely an embodiment of this utility model, and common knowledge such as specific structures and characteristics of the solution is not described in detail here. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model, and these should also be considered within the protection scope of this utility model. These modifications and improvements will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. An accessory mounting unit of a general-purpose engine, comprising an engine block and an accessory, and a cowling body provided on the engine block; characterized by: The air guide cover is provided with assembly ribs for installing the accessories; the assembly ribs are provided with reinforcing members to improve the installation strength and rigidity of the assembly ribs.

2. The accessory mounting unit of the general-purpose engine according to claim 1, characterized by: The assembly ribs and reinforcing members are set separately.

3. The accessory mounting unit for a general-purpose engine according to claim 2, characterized in that: The assembly rib is provided with an installation part, and a first installation hole is opened on the installation part.

4. The accessory mounting unit for a general-purpose engine according to claim 3, characterized in that: The mounting part is a tongue-shaped or sheet-shaped structure, with one end connected to the air guide cover and the other end extending obliquely in the direction of the air guide cover to the inside or outside to form an extension. The first mounting hole is provided on the extension.

5. The accessory mounting unit for a general-purpose engine according to claim 4, characterized in that: The reinforcing member is a clamping member with two clamping parts, each clamping part having a second mounting hole. When the extension is clamped between the two clamping parts, the first mounting hole and the second mounting hole are coaxial.

6. The accessory mounting unit for a universal engine according to any one of claims 3-5, characterized in that: The mounting section is configured as two parts, and the two mounting sections are arranged at an interval.

7. The accessory mounting unit for a general-purpose engine according to claim 6, characterized in that: The air guide cover and the mounting part are an integrated structure.

8. The accessory mounting unit for a general-purpose engine according to claim 7, characterized in that: The air guide cover includes an air inlet surface and side walls arranged circumferentially around the air inlet surface.

9. The accessory mounting unit for a general-purpose engine according to claim 8, characterized in that: The assembly ribs are installed on the side wall of the air guide cover.

10. The accessory mounting unit for a general-purpose engine according to claim 9, characterized in that: The accessory includes a fuel pump.

Images