Engine flywheel housing for non-road device with detachable PTO assembly

Abstract

The utility model discloses an engine flywheel casing for a non-road device with a detachable PTO (Power Take Off) assembly, which comprises a flywheel casing body, a first groove, a second groove, a first connecting piece and a second connecting piece, the upper end of the flywheel casing body is provided with a plurality of arc-shaped second grooves used for installing engine PTO assemblies, the radiuses of the arcs of all the parts are uniform, the depth H of the second grooves is smaller than or equal to the radius of the arcs, and the upper end of the flywheel casing body and the two sides of the second grooves are first installation faces. A plurality of first mounting holes are formed in the first mounting surface, and first through holes are formed in the PTO shell corresponding to the holes; a second installation face is arranged on the front face of the flywheel shell body and around the second groove, a plurality of second installation holes are formed in the second installation face, second through holes are formed in the PTO assembly and correspond to the second installation holes in position, and after the PTO assembly is installed in the PTO shell, connecting pieces penetrate through the second through holes and the second installation holes to fix the PTO assembly to the flywheel shell body. According to the flywheel shell, the production cost is reduced, the product development period is shortened, and the flexibility and universality of the flywheel shell are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of engine, especially to a non - road device engine flywheel housing with detachable PTO assembly. BACKGROUND

[0002] The flywheel housing is located at the rear end of the engine, connecting the crankshaft and the transmission system (such as gearbox, hydraulic pump, generator, etc.), it is not only the installation carrier of the flywheel, but also undertakes the following functions: supporting the weight and torque of the transmission system; providing sealing protection to prevent oil leakage and external impurities from entering; as an integrated platform of power take-off (English abbreviation: PTO) interface. In the application field of non-road devices, the design of engine power take-off often needs to closely match the specific operation needs of various machines, such as silage machine and corn harvester, etc. Agricultural machinery equipment, due to its complex operation process and multi-functionality, usually has diversified needs for PTO power take-off port, often requiring multiple PTO power take-off ports to adapt to different working accessories and operation scenarios. These devices may need to drive cutting knives, conveyors or mixers under different speeds and powers, so they have detailed and variable requirements for the number, speed ratio and output power of PTO power take-off port. In contrast, basic agricultural machinery such as tractors, which have relatively simple functions, usually do not need to frequently change or connect multiple working devices, so they have relatively less demand for PTO power take-off port, and even do not need it at all. However, this difference not only exists between different types of machines, but even for the same type of machine, different manufacturers will have diversified requirements for the parameters of PTO power take-off port according to their design concepts, user positioning and cost control factors.

[0003] The traditional PTO arrangement adopts a relatively direct and fixed strategy, that is, the PTO gear shaft is directly installed on the special interface of the flywheel housing, which is precast on the flywheel housing. This design is quite rigid when facing diversified PTO requirements, lacking the necessary flexibility. Whenever a new PTO assembly needs to be adapted, the entire flywheel housing usually needs to be redesigned and manufactured to adapt to different PTO assemblies, which not only is time-consuming and tedious, but also consumes a lot of resources, increasing the overall manufacturing cost of the engine, which is not conducive to the improvement of production efficiency and economic benefits.

[0004] The disclosure of the above background art content is only used to assist in understanding the concept and technical scheme of the utility model, which does not necessarily belong to the prior art of the present patent application. In the absence of explicit evidence that the above content has been disclosed before the filing date of the present patent application, the above background art should not be used to evaluate the novelty and inventiveness of the present application. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of non-road device engine flywheel housing of detachable PTO assembly, to solve the technical problem that whole flywheel housing needs to be redesigned and manufactured to face diversified PTO demand.

[0006] For this purpose, the utility model provides a kind of non-road device engine flywheel housing of detachable PTO assembly.

[0007] Preferably, the utility model can also have the following technical features:

[0008] A kind of non-road device engine flywheel housing of detachable PTO assembly, comprising: flywheel housing body, the first recess of installation flywheel is provided in the front of the flywheel housing body;Several second recesses for installing engine PTO assembly are provided on the upper end of the flywheel housing body, the second recess is circular arc, the radius of each part circular arc of the second recess is uniform, its depth H is less than or equal to the radius of circular arc, the upper end of the flywheel housing body, the first mounting surface of both sides of the second recess;Several first mounting holes are provided on the first mounting surface, first through holes are provided on PTO shell corresponding to the position of the first mounting hole;The second mounting surface is around the front of the flywheel housing body and the second recess, several second mounting holes are provided on the second mounting surface, second through holes are provided on the PTO assembly corresponding to the position of the second mounting hole, after the PTO assembly is loaded into the PTO shell, PTO assembly can be fixed on flywheel housing body using connecting piece through the second through hole and second mounting hole.

[0009] Preferably, the depth H of the second recess is

[0010] Preferably, the depth H of the second recess is

[0011] Preferably, the included angle of the first mounting surface and the vertical center line of the first recess is α, 30°≤α≤90°.

[0012] Preferably, the included angle of the first mounting surface and the vertical center line of the first recess is α, α=60°.

[0013] Preferably, it further includes first cover plate, several third through holes are provided on the first cover plate corresponding to the position of the first mounting hole, to fix the first cover plate to the first mounting surface using connecting piece through the third through hole.

[0014] Preferably, it further includes second cover plate and third cover plate respectively provided on the front and back of the second recess.

[0015] Preferably, gasket is provided on the first mounting surface.

[0016] Preferably, an O-ring is provided between the PTO component and the PTO shell.

[0017] The beneficial effects of this utility model compared with the prior art include:

[0018] 1. The flywheel housing of this utility model is provided with two second grooves for installing PTO components. It eliminates the need to open different flywheel housing molds for various models. A standardized flywheel housing can be manufactured using a single mold. According to the device requirements, a matching PTO component can be set. Where the PTO component does not need to be installed, a cover plate can be installed. This flywheel housing can meet the installation requirements of most off-road device PTO components. For engine manufacturers, the use of the above-mentioned flywheel housing can reduce production costs, shorten product development cycles, and improve the flexibility and versatility of the flywheel housing, bringing convenience to the installation of power output systems for off-road devices.

[0019] 2. In this invention, the depth of the second groove is set to a fraction of its diameter. To minimize the overall dimensions of the flywheel housing, when PTO installation is not required, the space occupied by the flywheel housing is reduced, making it easier to arrange the engine space, adapting to more models, improving its versatility, reducing manufacturing costs for enterprises, improving economic efficiency, reducing the mold required to form the flywheel housing, saving mold costs, and also reducing the use of flywheel housing materials to a certain extent, thus reducing material costs. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of the flywheel housing according to a specific embodiment of this utility model.

[0021] Figure 2 This is a schematic diagram of a specific embodiment of the present invention without the PTO component installed.

[0022] Figure 3 This is a schematic diagram of a specific embodiment of the present invention, showing the installation of a PTO component.

[0023] Figure 4 This is a schematic diagram of the installation of two PTO components in a specific embodiment of this utility model.

[0024] Figure 5 This is a specific embodiment of the present utility model. Figure 2 A sectional view taken along section line B.

[0025] Figure 6 This is a specific embodiment of the present utility model. Figure 4 A sectional view taken along section line E.

[0026] Explanation of reference numerals in the attached drawings: 1-Flywheel housing body; 2-First groove; 3-Second groove; 4-First mounting surface; 5-First mounting hole; 6-Second mounting hole; 7-First cover plate; 8-Second cover plate; 9-Gasket; 10-PTO assembly; 11-PTO housing; 12-First through hole; 13-Second through hole; 14-Third cover plate; 15-O-ring; 16-PTO interface; 17-Second mounting surface; 18-Third through hole. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to specific embodiments and the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope and application of the present invention.

[0028] Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein the same reference numerals denote the same parts unless otherwise specifically stated.

[0029] An engine flywheel housing for off-road devices with a removable PTO assembly, such as Figures 1-6 As shown, the device includes a flywheel housing body 1. The flywheel housing body 1 has a first groove 2 on its front side for mounting the flywheel. Several second grooves 3 for mounting the engine PTO assembly 10 are provided on the upper end of the flywheel housing body 1. The second grooves 3 are arc-shaped, with each part of the arc having a uniform radius and a depth H less than or equal to the radius of the arc. The upper end of the flywheel housing body 1 and both sides of the second grooves 3 form first mounting surfaces 4. Several first mounting holes 5 are provided on the first mounting surfaces 4, corresponding to the positions of the first mounting holes 5 on the PTO housing 1. A first through hole 12 is provided on the flywheel housing body 1; the first mounting hole 5 is used to install the PTO housing 11 and the first cover plate 7; the front of the flywheel housing body 1 and the area around the second groove 3 form a second mounting surface 17, on which a plurality of second mounting holes 6 are provided. Corresponding to the positions of the second mounting holes 6, a second through hole 13 is provided on the PTO assembly 10. After the PTO assembly 10 is installed into the PTO housing 11, a connector is used to pass through the second through hole 13 and the second mounting hole 6 to fix the PTO assembly 10 onto the flywheel housing body 1. In actual production, considering the convenience of processing and the issue of installation accuracy, the PTO housing 11 is first installed onto the first mounting surface 4, and then a boring tool is used to bore the second groove 3 and the surface of the PTO interface 16 that contacts the PTO housing 11. After processing, the PTO assembly 10 is installed to ensure the installation accuracy of the PTO assembly 10.

[0030] In some examples of this embodiment, such as Figure 2 and 3 The depth H of the second groove 3 is equal to the diameter of the second groove 3. To minimize the overall dimensions of the flywheel housing body 1, when the PTO assembly 10 is not required, the space occupied by the flywheel housing body 1 is reduced, facilitating engine space arrangement, adapting to more engine models, improving its versatility, reducing manufacturing costs, and increasing economic efficiency. It also reduces the size of the mold used to form the flywheel housing body 1, saving mold costs; and it can further reduce the amount of flywheel housing material used, reducing material costs. Preferably, the depth H of the second groove 3 is [missing information - likely a percentage] of the diameter of the second groove. While ensuring the installation strength of the PTO component 10, the depth of the second groove 3 is minimized to reduce the space occupied by the flywheel housing body 1 to the greatest extent.

[0031] In other examples of this embodiment, such as Figures 1-3 As shown, the angle between the first mounting surface 4 and the vertical centerline of the first groove 2 is α, 30°≤α≤90°, to minimize the external dimensions of the flywheel housing body 1. When the PTO assembly 10 is not required, it reduces the space occupied by the flywheel housing body 1, as long as the PTO assembly 10 does not interfere with the flywheel housing body 1. This facilitates the spatial arrangement of the engine, adapts to more engine models, improves its versatility, reduces manufacturing costs, and increases economic efficiency. It also reduces the mold required to form the flywheel housing body 1, saving mold costs. Furthermore, it can reduce the use of flywheel housing material to a certain extent, reducing material costs. Preferably, α=60°.

[0032] In other examples of this embodiment, such as Figure 1 , 2 As shown in Figures 3 and 5, the system also includes a first cover plate 7, on which a plurality of third through holes 18 are provided at positions corresponding to the first mounting holes 5, so that a connector can be used to pass through the third through holes 18 to fix the first cover plate 7 to the first mounting surface 4.

[0033] In other examples of this embodiment, such as Figure 1 , 2 As shown in Figures 3 and 5, it also includes a second cover plate 8 and a third cover plate 14 respectively disposed on the front and back sides of the second groove 3. It should be noted here that... Figure 2 , 3 As shown in Figure 5, the first cover plate 7, the second cover plate 8, and the third cover plate 14 only need to be installed in their corresponding positions in devices that do not require or only require one PTO component 10. These first cover plates 7, 8, and 14 serve to seal the engine oil. Specifically, a gasket 9 can also be placed on the first mounting surface 4. When installing the PTO component, this gasket is placed between the first mounting surface 4 and the PTO housing 11; when not installing the PTO component, this gasket is placed between the first mounting surface 4 and the first cover plate 7. Of course, as... Figure 6As shown, to ensure a sealing effect, an O-ring 15 can also be provided between the PTO assembly 10 and the PTO shell 11.

[0034] Non-road equipment includes agricultural machinery, construction machinery, and industrial vehicles. Common agricultural machinery includes silage harvesters, corn harvesters, and tractors. Smaller or simpler silage harvesters, such as mounted silage harvesters, are typically equipped with a single PTO (Power Take-Off) assembly 10. This assembly connects to the tractor's power take-off shaft, providing power to the harvester's header, feeding device, and chopping device, enabling harvesting, feeding, and chopping of the silage crop. Larger self-propelled silage harvesters may be equipped with two PTO assemblies 10. One PTO assembly 10 drives the harvester's walking system, allowing the machine to move autonomously in the field. The other PTO assembly 10 drives the harvester's working components, such as the header, chopper, and throwing device, to complete the harvesting, chopping, and throwing of the silage crop. This separation of power between the walking and working components improves the machine's efficiency and performance. A negative-type corn harvester typically relies on a tractor for power and requires only one PTO assembly 10 connected to the tractor. Some self-propelled corn harvesters may be equipped with two PTO assemblies 10. One PTO assembly 10 is used to drive the engine and provide power for the overall operation of the harvester, including functions such as walking, steering, and lifting. The other PTO assembly 10 is used to drive the working devices of the corn harvester, such as the header, conveying device, threshing device, and cleaning device, to realize the harvesting, conveying, threshing, and cleaning of corn.

[0035] Construction machinery, such as loaders and excavators, typically have one PTO assembly 10, primarily used to drive the hydraulic pump, providing hydraulic power for the loader's bucket lifting and tilting operations, and the excavator's digging and slewing operations. However, some large, multi-functional construction machinery may be equipped with two or more PTO assemblies 10, depending on their specific functions, such as for connecting additional power output to auxiliary equipment like hydraulic breakers and drilling rigs. Industrial vehicles, such as forklifts, generally have one PTO assembly 10 to drive the hydraulic pump, enabling fork lifting and tilting operations. However, for some special-purpose forklifts, such as those with complex auxiliary devices like side shifters and swivels, additional PTO assemblies 10 may be added to provide power to these devices.

[0036] In summary, most common off-road devices have a maximum of two PTO components 10. Therefore, this embodiment takes the setting of two second grooves 3 as an example. On a device that needs to install one PTO component 10, the PTO component 10 is installed on one of its second grooves 3, while the other second groove 3 is surrounded by a first cover plate 7, a second cover plate 8, and a third cover plate 14 to prevent oil leakage at the second groove 3. On a device that needs to install two PTO components 10, the two PTO components 10 are installed on the corresponding second grooves 3. Of course, there are also devices that do not need to use PTO components 10, where cover plates are installed on the front and back of the two first mounting surfaces 4 and the second groove 3. Setting two second grooves 3 on the flywheel housing can meet the installation requirements of most off-road device PTO components 10. For engine manufacturers, using the flywheel housing with the above structure can reduce production costs. There is no need to make different flywheel housing molds for various models. The flywheel housing can be standardized, and the flywheel housing manufactured by one set of molds can be adapted to multiple devices. The number of PTO components 10 can be set according to the needs of different devices. The upper cover plate can be installed at the position where PTO components 10 are not needed. Of course, some special devices may require more than two PTO components 10. Special designs can be made for such devices.

[0037] Those skilled in the art will recognize that numerous variations are possible with respect to the above description, and the embodiments and figures are merely for describing one or more specific implementations.

[0038] Although exemplary embodiments of the present invention have been described and illustrated, those skilled in the art will understand that various changes and substitutions can be made thereto without departing from the spirit of the present invention. Furthermore, many modifications can be made to adapt specific situations to the doctrine of the present invention without departing from the central concept of the present invention described herein. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but may include all embodiments and equivalents that fall within the scope of the present invention.

Claims

1. An engine flywheel housing for a non-road device with a detachable PTO assembly, characterized in that, include: The flywheel housing body has a first groove on its front side for mounting the flywheel. Several second grooves for mounting engine PTO components are provided on the upper end of the flywheel housing body. These second grooves are arc-shaped, with a uniform radius for each part of the arc, and a depth H less than or equal to the radius of the arc. The upper end of the flywheel housing body and both sides of the second grooves form a first mounting surface. Several first mounting holes are provided on the first mounting surface, and first through holes are provided on the PTO housing corresponding to the positions of the first mounting holes. The front side of the flywheel housing body and the area around the second grooves form a second mounting surface, with several second mounting holes provided on the second mounting surface. Second through holes are provided on the PTO components corresponding to the positions of the second mounting holes. After the PTO components are installed into the PTO housing, a connector passing through the second through holes and second mounting holes can fix the PTO components to the flywheel housing body.

2. The engine flywheel housing for off-road devices with a detachable PTO assembly according to claim 1, characterized in that: The depth H of the second groove is equal to the diameter of the second groove.

3. The engine flywheel housing for off-road devices with a detachable PTO assembly according to claim 2, characterized in that: The depth H of the second groove is equal to the diameter of the second groove.

4. The engine flywheel housing for off-road devices with a detachable PTO assembly according to claim 1, characterized in that: The angle between the first mounting surface and the vertical center line of the first groove is α, where 30°≤α≤90°.

5. The engine flywheel housing for off-road devices with a detachable PTO assembly according to claim 4, characterized in that: The angle between the first mounting surface and the vertical center line of the first groove is α, where α = 60°.

6. The engine flywheel housing for off-road devices with a detachable PTO assembly according to claim 1, characterized in that: It also includes a first cover plate, on which a plurality of third through holes are provided at positions corresponding to the first mounting holes, so that the first cover plate can be fixed to the first mounting surface by means of a connector passing through the third through holes.

7. The engine flywheel housing for off-road devices with a detachable PTO assembly according to claim 6, characterized in that: It also includes a second cover plate and a third cover plate respectively disposed on the front and back of the second groove.

8. The engine flywheel housing for off-road devices with a detachable PTO assembly according to claim 1, characterized in that: A gasket is placed on the first mounting surface.

9. The engine flywheel housing for off-road devices with a detachable PTO assembly according to claim 1, characterized in that: An O-ring is provided between the PTO component and the PTO shell.

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