Idle wheel assembly of engine, engine and vehicle

Abstract

The utility model discloses an idle wheel assembly of an engine, the engine and a vehicle, and relates to the technical field of vehicles. The idle wheel assembly comprises an idle wheel shaft, two bushings and an idle wheel, the idle wheel shaft penetrates through the two bushings, the two bushings are sleeved with the idle wheel, the bushings are provided with matching faces matched with the idle wheel shaft and guide faces located at the two ends of the matching faces, and the guide faces are matched with the idle wheel shaft from the end, away from the other bush, of one bush to the end, close to the other bush, of the other bush. And the inner diameter of the matching surface is gradually reduced. From the end, away from the other lining, of one lining to the end, close to the other lining, of the lining, the matching face of the lining is constructed to be of the structural form with the inner diameter gradually reduced, the edge load of the idle wheel assembly can be reduced, the contact stress of the idle wheel assembly can be reduced, and therefore the service life of the idle wheel assembly can be prolonged, and the service life of the idle wheel assembly can be prolonged. And the transmission performance of the timing chain system of the engine can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to an idler wheel assembly of an engine, an engine and a vehicle. Background Art

[0002] In the related art, the idler wheel of the engine generally has the problems of large edge load and large contact stress, which seriously affects the service life of the idler wheel and leads to poor transmission performance of the timing chain system of the engine. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide an idler gear assembly of an engine, the idler gear assembly of the engine has a long service life.

[0004] The utility model further provides an engine.

[0005] The utility model further provides a vehicle.

[0006] According to the embodiment of the utility model, the idler assembly of the engine includes: an idler shaft and two bushings, wherein the idler shaft is inserted through the two bushings; an idler, wherein the idler is sleeved on the outside of the two bushings; the bushing has a mating surface mating with the idler shaft and guide surfaces at both ends of the mating surface, and the inner diameter of the mating surface gradually decreases from an end of one of the bushings away from the other bushing to an end close to the other bushing.

[0007] According to the idler assembly of the engine of the embodiment of the utility model, by constructing the mating surface of the bushing into a structure in which the inner diameter gradually decreases from the end of one bushing away from the other bushing to the end close to the other bushing, the edge load of the idler assembly can be reduced, and the contact stress of the idler assembly can be reduced, which is beneficial to increase the service life of the idler assembly and improve the transmission performance of the timing chain system of the engine.

[0008] According to some embodiments of the present invention, the maximum inner diameter and the minimum inner diameter of the two matching surfaces are the same.

[0009] According to some embodiments of the present invention, the maximum inner diameter of the two mating surfaces is A, and the minimum inner diameter of the two mating surfaces is B, satisfying the relationship: 5 microns ≤ AB ≤ 10 microns.

[0010] According to some embodiments of the present invention, a first gap is provided between the bushing and the idler shaft, and a dimension of the first gap along the radial direction of the idler assembly is C, satisfying the relationship: 40 microns ≤ C ≤ 60 microns.

[0011] According to some embodiments of the utility model, the idler shaft has a first oil passage penetrating the idler shaft along the radial direction of the idler assembly, the idler has a second oil passage penetrating the idler along the radial direction, the two bushings are spaced apart along the axial direction of the idler assembly to form a second gap, and the second gap is connected to both the first oil passage and the second oil passage.

[0012] According to some embodiments of the present utility model, the idler shaft has an indicator groove, the recessed direction of the indicator groove is perpendicular to the axial direction of the first oil channel, and the indicator groove is suitable for corresponding to the indicator part of the cylinder block of the engine.

[0013] According to some embodiments of the utility model, the idler shaft includes a shaft body and a first flange, the first flange is sleeved on the shaft body and is integrally formed with the shaft body, the bushing is sleeved on the shaft body, and the first flange has the indicator groove.

[0014] According to some embodiments of the present utility model, the number of the first oil passages is two, and the two first oil passages correspond one-to-one to the two bushings.

[0015] The engine according to the embodiment of the utility model comprises the above-mentioned idler gear assembly of the engine.

[0016] A vehicle according to an embodiment of the utility model includes the above-mentioned engine.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic diagram of an idler wheel assembly according to an embodiment of the utility model;

[0020] Figure 2 yes Figure 1 Schematic diagram of top view;

[0021] Figure 3 yes Figure 2 Schematic diagram of the cross section at AA in the middle;

[0022] Figure 4 It is a schematic diagram of the assembly of the idler shaft and the bushing according to an embodiment of the utility model;

[0023] Figure 5 is a schematic diagram of a bushing of an idler assembly according to an embodiment of the utility model;

[0024] Figure 6 yes Figure 5 Schematic cross-section diagram of .

[0025] Reference numerals:

[0026] Idler shaft 1;

[0027] Bushing 2; first bushing 21; second bushing 22; matching surface 23; guide surface 24;

[0028] Idler 3;

[0029] The second gap 42; the first oil passage 43; the second oil passage 44;

[0030] Indicator groove 5; first flange 6; shaft body 7;

[0031] Idler gear assembly 10. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] Reference below Figure 1-Figure 6 An idler gear assembly 10 of an engine according to an embodiment of the present invention is described.

[0034] like Figure 1-Figure 6 As shown, the idler assembly 10 of the engine according to the embodiment of the utility model includes: an idler shaft 1, two bushings 2 and an idler wheel 3, the idler shaft 1 is inserted into the two bushings 2, the idler wheel 3 is sleeved on the outside of the two bushings 2, the bushing 2 has a mating surface 23 mating with the idler shaft 1 and guide surfaces 24 located at both ends of the mating surface 23, and the inner diameter of the mating surface 23 gradually decreases from one end of one bushing 2 away from the other bushing 2 to the end close to the other bushing 2.

[0035] The idler assembly 10 of the engine includes an idler shaft 1, two bushings 2 and an idler 3. The idler shaft 1 is inserted into the two bushings 2, and the idler 3 is sleeved on the outside of the two bushings 2. In other words, from the outside to the inside of the idler assembly 10, the idler 3, the bushing 2 and the idler shaft 1 are sleeved in sequence, that is, the idler 3 is sleeved on the outside of the bushing 2, and the bushing 2 is sleeved on the outside of the idler shaft 1. The two bushings 2 include a first bushing 21 and a second bushing 22. Both bushings 2 have a mating surface 23 that matches the idler shaft 1 and guide surfaces 24 located at both ends of the mating surface 23. Both the mating surface 23 and the guide surface 24 are circumferential surfaces. Specifically, along the axial direction of the idler assembly 10 (i.e. Figure 3 The two ends of the mating surface 23 are provided with guide surfaces 24. By providing the two ends of the mating surface 23 with guide surfaces 24, the idler assembly 10 can be easily assembled.

[0036] From one end of one of the bushings 2 away from the other bushing 2 to the end close to the other bushing 2, the inner diameter of the mating surface 23 gradually decreases. That is to say, from the end of the first bushing 21 away from the second bushing 22 to the end close to the second bushing 22, the inner diameter of the mating surface 23 of the first bushing 21 gradually decreases, and from the end of the second bushing 22 away from the first bushing 21 to the end close to the first bushing 21, the inner diameter of the mating surface 23 of the second bushing 22 gradually decreases.

[0037] As some embodiments of the present application, the inner diameter of the mating surface 23 gradually decreases in the form of a linear function.

[0038] As some embodiments of the utility model, the two bushings 2 can be pressed in as an integral part, and then machined from the radial center to cut the integral part into two bushings 2. This arrangement can ensure assembly consistency and reduce errors generated when assembling the bushings 2.

[0039] In the above embodiment, by constructing the mating surface 23 of the bushing 2 into a structure with a gradually decreasing inner diameter from one end of one bushing 2 away from the other bushing 2 to the end close to the other bushing 2, the edge load of the idler assembly 10 can be reduced, and the contact stress of the idler assembly 10 can be reduced, which is beneficial to increase the service life of the idler assembly 10 and improve the transmission performance of the timing chain system of the engine.

[0040] According to some embodiments of the present invention, Figure 3 and Figure 6 As shown, the maximum inner diameter and the minimum inner diameter of the two mating surfaces 23 are the same.

[0041] As some embodiments of the utility model, the maximum inner diameter and the minimum inner diameter of the two mating surfaces 23 are the same, that is, the maximum inner diameter and the minimum inner diameter of the two mating surfaces 23 of the two bushings 2 are the same, specifically, the maximum inner diameter of the first bushing 21 and the maximum inner diameter of the second bushing 22 are the same, and the minimum inner diameter of the first bushing 21 and the minimum inner diameter of the second bushing 22 are the same.

[0042] In the above embodiment, the maximum inner diameter and the minimum inner diameter of the two mating surfaces 23 are the same. This arrangement is beneficial to reducing the edge load of the idler assembly 10 and reducing the contact stress of the idler assembly 10, thereby facilitating increasing the service life of the idler assembly.

[0043] According to some embodiments of the present invention, Figure 3As shown, the maximum inner diameter of the two mating surfaces 23 is A, and the minimum inner diameter of the two mating surfaces 23 is B, satisfying the relationship: 5 microns ≤ AB ≤ 10 microns.

[0044] As some embodiments of the utility model, the maximum inner diameter of the bushing 2 is A, the minimum inner diameter of the bushing 2 is B, the difference between the maximum inner diameter A of the bushing 2 and the minimum inner diameter B of the bushing 2 is AB, and AB can satisfy the relationship: 5 microns ≤ AB ≤ 10 microns, that is, the difference between the maximum inner diameter of the bushing 2 and the minimum inner diameter of the bushing 2 can be any value between 5 microns and 10 microns. For example, the difference between the maximum inner diameter of the bushing 2 and the minimum inner diameter of the bushing 2 can be but not limited to 5 microns, 8 microns, 10 microns, etc.

[0045] In the above embodiment, the difference AB between the maximum inner diameter A of the bushing 2 and the minimum inner diameter B of the bushing 2 can satisfy the relationship: 5 microns ≤ AB ≤ 10 microns. This setting can make the difference between the maximum inner diameter A and the minimum inner diameter B of the bushing 2 reasonable, thereby effectively reducing the edge load of the idler assembly 10 and the contact stress of the idler assembly 10.

[0046] According to some embodiments of the present invention, there is a first gap between the bushing 2 and the idler shaft 1, and the first gap is along the radial direction of the idler assembly 10 (i.e. Figure 3 The dimension of the Y direction (as shown) is C, which satisfies the relationship: 40 microns ≤ C ≤ 60 microns.

[0047] There is a first gap between the bushing 2 and the idler shaft 1, and the first gap is along the radial direction of the idler assembly 10 (i.e. Figure 3 The dimension of the first gap (in the Y direction shown) is C, and C can satisfy the relationship: 40 microns ≤ C ≤ 60 microns, that is, the first gap can be any value between 40 microns and 60 microns. For example, the first gap can be but not limited to 40 microns, 50 microns, 60 microns, etc.

[0048] In the above embodiment, the first gap is along the radial direction of the idler assembly 10 (ie Figure 3 The dimension C of the idler wheel assembly 10 (in the Y direction shown in the figure) can satisfy the relationship: 40 microns ≤ C ≤ 60 microns. This arrangement can make the first gap along the radial direction of the idler wheel assembly 10 (i.e. Figure 3 The dimension C (in the Y direction shown in the figure) is reasonable, so that the bushing 2 and the idler shaft 1 are filled with relatively sufficient lubricating oil, which is beneficial to reducing the friction between the bushing 2 and the idler shaft 1.

[0049] According to some embodiments of the present invention, Figure 1 , Figure 3-Figure 5 As shown, the idler shaft 1 has a radial direction (i.e. Figure 3The first oil passage 43 of the idler shaft 1 (in the Y direction shown in the figure) passes through the idler shaft 1, and the idler 3 has a radial direction (i.e. Figure 3 The second oil passage 44 of the idler wheel 3 is penetrated by the two bushings 2 along the axial direction of the idler wheel assembly 10 (ie, Figure 3 The second gap 42 is arranged at intervals (in the X direction shown in the figure) to form a second gap 42, and the second gap 42 is connected to both the first oil passage 43 and the second oil passage 44.

[0050] As some embodiments of the present invention, the idler shaft 1 has a radial direction (i.e. Figure 3 The first oil passage 43 of the idler shaft 1 (in the Y direction as shown) can be multiple (such as Figure 3 As shown, the number of the first oil passages 43 is two, and lubricating oil (such as engine oil) can flow through the first oil passages 43 to the second gap 42 to lubricate the contact surface between the bushing 2 and the idler shaft 1. The idler 3 has a radial direction (i.e. Figure 3 The second oil passage 44 (in the Y direction as shown) runs through the idler gear 3 , and the lubricating oil in the second gap 42 can flow out of the idler gear assembly 10 through the second oil passage 44 .

[0051] In the above embodiment, the idler shaft 1 has a first oil passage 43, the idler 3 has a second oil passage 44, the second gap 42 is connected to the first oil passage 43 and the second oil passage 44, the first oil passage 43, the first gap, the second gap 42 and the second oil passage 44 form a passage for lubricating oil to enter and finally flow out of the idler assembly 10, so as to lubricate the idler assembly 10 evenly and effectively, which is beneficial to reduce the probability of dry friction of the idler assembly 10, improve the working state of the idler assembly 10, and extend the service life of the idler assembly 10.

[0052] As some embodiments of the present application, the two bushings 2 can be pressed into one piece as a whole, and then machined from the radial center to cut the whole piece into two bushings 2, so that the two bushings 2 are aligned along the axial direction of the idler assembly 10 (i.e. Figure 3 The second gap 42 is formed by spacing the second gap 42 in the X direction as shown in the figure, so that the second gap 42 can correspond to the second oil channel 44, and the assembly consistency can be ensured.

[0053] According to some embodiments of the present invention, Figure 4 As shown, the idler shaft 1 has an indicating groove 5, the recessed direction of the indicating groove 5 is perpendicular to the axial direction of the first oil passage 43, and the indicating groove 5 is suitable for corresponding to the indicating portion of the cylinder block of the engine.

[0054] As some embodiments of the utility model, the cylinder block of the engine has an indicating portion, which may be a groove or a protrusion, and the idler shaft 1 has an indicating groove 5, which is located on the end surface of the idler shaft 1, and is suitable for corresponding to the indicating portion of the cylinder block of the engine, and the recessed direction of the indicating groove 5 is perpendicular to the axial direction of the first oil channel 43.

[0055] When assembling the idler assembly 10 to the engine, by making the indicator groove 5 correspond to the indicating part, since the recessed direction of the indicator groove 5 is perpendicular to the axial direction of the first oil channel 43, the extension direction of the first oil channel 43 can be perpendicular to the chain force direction, so that the lubricating oil can flow evenly through the idler assembly 10, which is beneficial to ensure that the idler assembly 10 has a better lubrication effect when working, thereby improving the working state of the idler assembly 10 and extending the service life of the idler assembly 10.

[0056] According to some embodiments of the present invention, Figure 3 As shown, the idler shaft 1 includes a shaft body 7 and a first flange 6 , the first flange 6 is sleeved on the shaft body 7 and is integrally formed with the shaft body 7 , the bushing 2 is sleeved on the shaft body 7 , and the first flange 6 has an indicator groove 5 .

[0057] As some embodiments of the utility model, the idler shaft 1 includes a shaft body 7 and a first flange 6, the outer diameter of the first flange 6 is larger than the outer diameter of the shaft body 7, the first flange 6 is sleeved on the shaft body 7 and is integrally formed with the shaft body 7, that is, the first flange 6 and the shaft body 7 are constructed as an integrally formed part, and the integrally formed part has good structural strength. By integrally forming the first flange 6 and the shaft body 7, the connection reliability between the first flange 6 and the shaft body 7 can be improved, and the probability of breakage at the connection between the first flange 6 and the shaft body 7 can be reduced. The indicator groove 5 is provided on the first flange 6, so that the indicator groove 5 corresponds to the indicator part of the cylinder block of the engine during installation, so as to improve the assembly efficiency and reduce the difficulty of assembly.

[0058] The bushing 2 is sleeved on the shaft body 7. During the process of assembling the idler assembly 10, the first flange 6 and the bushing 2 can be aligned along the radial direction of the idler assembly 10 (i.e. Figure 3 The Y direction as shown in the figure) stops to remind you that the installation is in place.

[0059] According to some embodiments of the present invention, Figure 3 As shown, there are two first oil passages 43 , and the two first oil passages 43 correspond to the two bushings 2 one by one.

[0060] As some embodiments of the utility model, the number of the first oil passages 43 is set to two, and the two first oil passages 43 correspond one-to-one to the two bushings 2, that is, the first bushing 21 and the second bushing 22 each have a corresponding first oil passage 43. Such a setting can ensure that there is sufficient lubricating oil between the first bushing 21 and the idler shaft 1, and between the second bushing 22 and the idler shaft 1, so as to achieve a better lubrication effect.

[0061] According to the engine of the embodiment of the utility model, including the idler assembly 10 of the above embodiment, from the end of one bushing 2 away from the other bushing 2 to the end close to the other bushing 2, by constructing the mating surface 23 of the bushing 2 into a structural form with a gradually decreasing inner diameter, the edge load of the idler assembly 10 can be reduced, and the contact stress of the idler assembly 10 can be reduced, which is beneficial to increase the service life of the idler assembly 10 and improve the transmission performance of the timing chain system of the engine.

[0062] According to the vehicle embodiment of the utility model, including the engine of the above embodiment, from one end of one bushing 2 away from the other bushing 2 to the end close to the other bushing 2, by constructing the mating surface 23 of the bushing 2 into a structural form with a gradually decreasing inner diameter, the edge load of the idler assembly 10 can be reduced, and the contact stress of the idler assembly 10 can be reduced, which is beneficial to increase the service life of the idler assembly 10 and improve the transmission performance of the timing chain system of the engine.

[0063] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0064] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0065] In the description of the present invention, "plurality" means two or more.

[0066] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0067] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0068] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0069] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An idler gear assembly (10) of an engine, characterized in that: include: An idler shaft (1) and two bushings (2), wherein the idler shaft (1) passes through the two bushings (2); An idler wheel (3), wherein the idler wheel (3) is sleeved on the outside of the two bushings (2); The bushing (2) has a mating surface (23) mating with the idler shaft (1) and guide surfaces (24) located at both ends of the mating surface (23), and the inner diameter of the mating surface (23) gradually decreases from an end of one of the bushings (2) away from the other bushing (2) to an end close to the other bushing (2).

2. The idler gear assembly (10) of the engine according to claim 1, characterized in that: The maximum inner diameter and the minimum inner diameter of the two matching surfaces (23) are the same.

3. The idler gear assembly (10) of the engine according to claim 1, characterized in that: The maximum inner diameter of the two matching surfaces (23) is A, and the minimum inner diameter of the two matching surfaces (23) is B, satisfying the relationship: 5 microns ≤ AB ≤ 10 microns.

4. The idler gear assembly (10) of the engine according to claim 1, characterized in that: There is a first gap between the bushing (2) and the idler shaft (1), and the dimension of the first gap along the radial direction of the idler assembly (10) is C, satisfying the relationship: 40 microns ≤ C ≤ 60 microns.

5. The idler gear assembly (10) of an engine according to any one of claims 1 to 4, characterized in that: The idler shaft (1) has a first oil passage (43) penetrating the idler shaft (1) along the radial direction of the idler assembly (10); the idler (3) has a second oil passage (44) penetrating the idler (3) along the radial direction; the two bushings (2) are spaced apart in the axial direction of the idler assembly (10) to form a second gap (42); the second gap (42) is connected to both the first oil passage (43) and the second oil passage (44).

6. The idler gear assembly (10) of the engine according to claim 5, characterized in that: The idler shaft (1) has an indicating groove (5), the recessed direction of the indicating groove (5) is perpendicular to the axial direction of the first oil passage (43), and the indicating groove (5) is suitable for corresponding to the indicating portion of the cylinder block of the engine.

7. The idler gear assembly (10) of the engine according to claim 6, characterized in that: The idler shaft (1) comprises a shaft body (7) and a first flange (6), wherein the first flange (6) is sleeved on the shaft body (7) and is integrally formed with the shaft body (7), the bushing (2) is sleeved on the shaft body (7), and the first flange (6) has the indicator groove (5).

8. The idler gear assembly (10) of the engine according to claim 5, characterized in that: The number of the first oil passages (43) is two, and the two first oil passages (43) correspond one to one to the two bushings (2).

9. An engine, characterized in that: An idler gear assembly (10) for an engine comprising the engine according to any one of claims 1-8.

10. A vehicle, characterized in that: Comprising an engine according to claim 9.

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