CN119244724A

CN119244724A - Front end cover assembly and vehicle

Info

Publication number: CN119244724A
Application number: CN202411432409.0A
Authority: CN
Inventors: 李振国; 赫建勇; 刘娟; 宫一鸣; 王资政
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2024-10-14
Filing date: 2024-10-14
Publication date: 2025-01-03

Abstract

The application relates to a front end cover assembly and a vehicle, which are applied to the field of frame structures. The front end cover comprises a front end cover, a shaft cover and a lubricating oil pump, wherein the front end cover comprises a mounting hole for mounting an input shaft of a speed changer and a first stepped hole formed along the periphery of the mounting hole, the first stepped hole is used for assembling an oil seal, the shaft cover is detachably mounted on the front end cover and used for packaging the oil seal in the first stepped hole, the front end cover further comprises a first middle shaft hole, the lubricating oil pump is assembled in the first middle shaft hole and can be in transmission connection with the middle shaft of the speed changer, an oil cavity and a lubricating oil duct are arranged in the front end cover, and the first middle shaft hole and the first stepped hole can be communicated with the oil cavity through the lubricating oil duct. According to the application, the first stepped hole is formed in the end face of the front end cover matched with the shaft cover, so that the oil seal is packaged in the first stepped hole after the shaft cover is assembled, the axial limit of the oil seal is realized, and the front end cover is detachably connected with the shaft cover, so that the oil seal can be conveniently disassembled and assembled.

Description

Front end cover assembly and vehicle

Technical Field

The application relates to the technical field of frame structures, in particular to a front end cover assembly and a vehicle.

Background

A transmission refers to a driveline component for a vehicle that functions to transfer power and torque generated by an engine to drive wheels through different gear ratios to accommodate different driving conditions and demands. In general, the transmission adopts a front end cover assembly to integrate the lubricating oil pump and the intermediate shaft sealing end cover so as to realize modularized design and reduce the number of parts.

In the related art, the front end cover assembly is used as a core component for realizing lubrication, front end sealing of a transmission and supporting of a clutch release bearing, and is generally composed of a shaft cover, a lubricating oil pump, an oil seal and a front end cover. In practical application, the clutch release bearing is supported by a shaft cover to realize the separation and the engagement of the clutch, and lubricating oil is provided for the transmission through the lubricating oil pump and the arrangement of the lubricating oil path on the front end cover.

However, the front end cover assembly after the integrated design is adopted has the advantages of fixed integral structure, low assembly flexibility and easy occurrence of the condition of high oil seal disassembly difficulty.

Disclosure of Invention

Accordingly, it is necessary to provide a front end cover assembly and a vehicle, which solve the problem that the oil seal of the front end cover assembly is difficult to disassemble after the integrated design.

In a first aspect, the present application provides a front end cover assembly, which adopts the following technical scheme:

The front end cover assembly comprises a front end cover, a shaft cover and a lubricating oil pump, wherein the front end cover comprises a mounting hole for mounting an input shaft of a speed changer and a first stepped hole formed along the periphery of the mounting hole, the first stepped hole is used for assembling an oil seal, the shaft cover is detachably mounted on the front end cover and used for packaging the oil seal in the first stepped hole, the front end cover further comprises a first middle shaft hole, the lubricating oil pump is mounted in the first middle shaft hole and can be in transmission connection with the middle shaft of the speed changer, an oil cavity and a lubricating oil duct are arranged in the front end cover, and the first middle shaft hole and the first stepped hole can be communicated with the oil cavity through the lubricating oil duct.

In one embodiment, the lubrication oil passage includes a lubrication passage, an oil inlet passage and an oil outlet passage, the lubrication passage communicates the first stepped hole with the oil chamber, and the oil inlet passage and the oil outlet passage are both communicated between the oil chamber and the first intermediate shaft hole.

In one embodiment, the front end cover is provided with a second stepped hole at one side matched with the transmission, and the lubricating oil pump further comprises an oil pump cover arranged in the second stepped hole and detachably connected with the front end cover.

In one embodiment, the lubricant pump comprises a driving shaft arranged in the first intermediate shaft hole, an inner rotor coaxially fixed on the driving shaft, and an outer rotor sleeved on the periphery of the inner rotor, wherein the driving shaft comprises a right connecting end, and the right connecting end penetrates through the lubricant pump cover and can be in transmission connection with the intermediate shaft of the transmission.

In one embodiment, the front end cover further comprises a weight-reducing groove, wherein the weight-reducing groove is distributed along the circumference of the mounting hole in a conformal manner.

In one embodiment, the one axle cover is configured to be made by a sheet metal stamping process.

In one embodiment, the one axle cover is constructed as a unitary structure.

In one embodiment, the front end cover assembly further comprises a plurality of reinforcing ribs arranged on the surface of the shaft cover, and the reinforcing ribs are integrally formed on the shaft cover.

In one embodiment, the front end cover further includes a second intermediate shaft hole formed with a cavity for receiving the intermediate shaft of the transmission on the other side.

In a second aspect, the present application provides a vehicle, which adopts the following technical scheme:

A vehicle comprises the front end cover assembly.

According to the front end cover assembly, the first stepped hole is formed in the end face of the front end cover matched with the shaft cover, so that the oil seal is packaged in the first stepped hole after the shaft cover is assembled, the limit of the oil seal on the axial direction of the front end cover is realized, and the front end cover and the shaft cover are assembled in a detachable connection mode, so that the oil seal can be conveniently installed and detached, and the overhaul difficulty is reduced.

Drawings

FIG. 1 is a front cross-sectional view of a front end cap assembly in accordance with one embodiment of the present application.

FIG. 2 is a left side cross-sectional view of a front end cap assembly in accordance with one embodiment of the present application.

Fig. 3 is an isometric view of a shaft cover in an example embodiment of the application.

The drawings are marked with the following description:

1. front end cover, 11, mounting hole, 12, first stepped hole, 13, first intermediate shaft hole, 14, oil cavity, 151, lubrication channel, 152, oil inlet channel, 153, oil outlet channel, 16, second stepped hole, 17, weight reducing groove, 18, second intermediate shaft hole, 2, a shaft cover, 3, lubrication oil pump, 31, oil pump cover, 32, driving shaft, 33, inner rotor, 34, outer rotor, 4, oil seal, G1, central axis, A-A, vertical end face.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, they may be fixedly connected, detachably connected or integrally formed, mechanically connected, electrically connected, directly connected or indirectly connected through an intermediate medium, and communicated between two elements or the interaction relationship between two elements unless clearly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

A transmission refers to a driveline component for a vehicle that functions to transfer power and torque generated by an engine to drive wheels through different gear ratios to accommodate different driving conditions and demands.

In the related art, a front end cover assembly is generally adopted to integrate a lubricating oil pump and a sealing end cover of a middle shaft, so that a modularized design is realized, and the number of parts is reduced. The front end cover assembly is used as a core component for realizing lubrication, front end sealing of the transmission and supporting of a clutch release bearing, and is generally composed of a shaft cover, a lubricating oil pump, an oil seal and a front end cover. The clutch release bearing is supported by a shaft cover to realize the separation and the engagement of the clutch, and the lubricating oil pump and the front end cover are provided with a lubricating oil path to provide lubricating oil for the transmission.

In some prior art, in order to realize integrated design, an integrated front end cover assembly, namely a shaft cover and a front end cover are made into a whole, but at the same time, the problems of complex casting process, high difficulty, complex part machining process and large overall weight are brought.

In other prior art, a shaft cover is divided into two sections, one section adopts sheet metal parts, the other section adopts castings, the sections are connected through nested matching and bolts, and finally the front end cover is fixed on the front shell through bolts to realize assembly, but the problems of complex structure and high manufacturing difficulty of the shaft cover are caused, and the lubrication function of the oil pump is not realized.

In other related technologies, there is a design of dividing a shaft cover into two sections, connecting the two sections of shaft components into a whole by welding to realize the functions of sealing and supporting the release bearing, but a shaft cover stamping part needs to be welded and machined to realize the functions, so that the whole structure is difficult, high in cost and difficult to manufacture.

Therefore, the adoption of the front end cover structure after the integrated design inevitably leads to the increase of weight, increases the oil consumption and the product cost of the whole vehicle, and even causes the problems that the oil leakage risk is easy to occur due to improper arrangement and the oil seal is difficult to disassemble. In order to solve the above problems, the present application provides a front end cover assembly with light weight and low cost as principles, so as to solve the above technical problems. Embodiments of the present application are described in further detail below with reference to FIGS. 1-3.

Referring to fig. 1, fig. 1 shows a front end cover assembly in a front cross-sectional view, and an embodiment of the present application provides a front end cover assembly, which includes a front end cover 1, a shaft cover 2 detachably mounted on the front end cover 1, and a lubricant pump 3 embedded on the front end cover 1, wherein the lubricant pump 3 can be connected to a transmission intermediate shaft in a driving manner, so that lubricant is pumped under the driving of the transmission intermediate shaft to realize the circulation movement of the lubricant.

Along the direction of the central axis G1 of the front cover 1, an installation hole 11 for installing the transmission input shaft is provided at the axial center of the front cover 1. In the embodiment of the present application, the end face of the front end cap 1 for fitting a shaft cap 2 is defined as a perpendicular end face A-A, which is perpendicular to the central axis G1 of the front end cap 1. In particular, a shaft cover 2 can be removably mounted to the vertical end face A-A by means of fasteners, including but not limited to bolts.

Further, the front end cover 1 is provided with a first stepped hole 12 with a vertical end face A-A as an end face, the first stepped hole 12 is arranged along the periphery of the mounting hole 11 and is communicated with the mounting hole 11, and in the embodiment of the application, the first stepped hole 12 is used for assembling the oil seal 4. In the radial direction of the front end cap 1, the size of the inner diameter of the first stepped hole 12 is larger than the size of the inner diameter of the mounting hole 11. During actual assembly, after the shaft cover 2 is assembled to the front end cover 1 by means of the fastener, the end face of the shaft cover 2 facing one side of the front end cover 1 can be matched with the inner wall of the first stepped hole 12 to encapsulate the oil seal 4 in the first stepped hole 12, so that the oil seal 4 is limited in the axial direction of the front end cover 1, the mounting hole 11 is plugged, and oil leakage of the transmission is reduced.

Meanwhile, as the shaft cover 2 and the front end cover 1 are detachably connected by the aid of the fasteners, the assembling mode has the effect of facilitating the installation and the disassembly of the oil seal 4, and the assembling and overhauling difficulties of the oil seal 4 can be reduced to a certain extent.

In addition, the application skillfully divides the front end cover assembly into two mutually independent parts, namely the shaft cover 2 and the front end cover 1, so that on one hand, the whole weight of the front end cover assembly can be greatly reduced, and on the other hand, the machining difficulty of the front end cover 1 can be reduced, thereby improving the qualification rate of the front end cover assembly parts and reducing the manufacturing cost of the front end cover assembly.

Referring now to FIG. 2, FIG. 2 illustrates a left side cross-sectional view of a front end cap assembly in accordance with one embodiment of the present application. In some embodiments, in order to further reduce the overall weight of the front end cover assembly, at least one weight-reducing groove 17 is further formed in the front end cover 1 to reduce the weight of the front end cover 1, thereby reducing the overall weight of the front end cover assembly, and realizing the overall lightweight design of the front end cover assembly.

Taking fig. 2 as an example, four weight-reducing grooves 17 are formed in the front end cover 1, and the weight-reducing grooves 17 are configured as waist-shaped grooves distributed along the circumferential direction of the mounting hole 11. Along the circumference of the mounting hole 11, four threaded holes are further formed in the front end cover 1, and the threaded holes are used for mounting fasteners. Specifically, four weight-reducing grooves 17 are uniformly distributed in the front end cover 1 along the circumferential direction of the mounting hole 11, and the weight-reducing grooves 17 are alternately arranged with screw holes for mounting fasteners along the circumferential direction of the mounting hole 11, thereby covering a larger area on the vertical end face A-A as much as possible and reducing the weight of the front end cover 1 as much as possible.

Referring to fig. 1-3, fig. 3 illustrates an isometric view of an axle cover 2 in accordance with an embodiment of the application. Further, in some embodiments, a shaft cover 2 is configured to be manufactured by a sheet metal stamping process, and a shaft cover 2 is capable of being detachably connected to the front end cover 1 by means of fasteners, such as bolts, for supporting the clutch release bearing for reciprocation.

In the embodiment of the application, the shaft cover 2 is manufactured by adopting a sheet metal stamping process, namely, the shaft cover 2 is constructed as a sheet metal stamping part and is of an integrated structure, and the shaft cover 2 has fewer redundant structures during manufacturing and is not easy to cause the situation of increasing the weight of materials after processing, so that the weight of the whole front end cover assembly can be further reduced.

In other embodiments, the end face of a shaft cover 2 is provided with a connection hole to the front end cover 1. A plurality of reinforcing ribs are distributed on the surface of the shaft cover 2, and all the reinforcing ribs are uniformly formed on the surface of the shaft cover 2, specifically, the reinforcing ribs can be directly formed on the surface of the shaft cover 2 through stamping by a sheet metal stamping process, so that the strength of connection between the reinforcing ribs and the shaft cover 2 is ensured.

Specifically, a part of the reinforcing ribs are arranged along the periphery of a shaft cover 2 and protrude from the end face of the shaft cover 2, so as to improve the rigidity and structural strength of the shaft cover 2. The other part of the reinforcing ribs are arranged at the connecting hole parts so as to further improve the rigidity and stamping manufacturability of the shaft cover 2. Also, protruding reinforcing ribs in the direction of the inner hole are arranged at the circumference of the long cylindrical end of a shaft cover 2, also for improving the rigidity and punching manufacturability of a shaft cover 2.

Referring to fig. 1, in some embodiments, the front end cover 1 further includes an oil cavity 14, a lubrication oil channel, and a first intermediate shaft hole 13 for accommodating the lubrication oil pump 3, where the oil cavity 14 is used for storing lubrication oil, the lubrication oil pump 3 can be drivingly connected to a transmission intermediate shaft, and the first intermediate shaft hole 13 and the first stepped hole 12 can be communicated with the oil cavity 14 by means of the lubrication oil channel, so as to implement pumping circulation of the lubrication oil, so as to ensure lubrication effect of the front end cover assembly.

Specifically, the lubrication oil passage includes a lubrication channel 151, an oil inlet channel 152 and an oil outlet channel 153 that are connected to the oil chamber 14, and the lubrication channel 151 connects the first stepped hole 12 to the oil chamber 14, so as to lubricate the portion of the oil seal 4. The oil inlet passage 152 and the oil outlet passage 153 are both communicated between the oil chamber 14 and the first intermediate shaft hole 13 to realize pumping circulation of lubricating oil among the first intermediate shaft hole 13, the first stepped hole 12, and the oil chamber 14.

Wherein, the front end cover 1 is used for being equipped with the second step hole 16 with derailleur complex one side, and the second step hole 16 runs through in the terminal surface of front end cover 1 towards derailleur one side. The lubricant pump 3 includes an oil pump cover 31 disposed in the second stepped hole 16, and the oil pump cover 31 is detachably connected to the front end cover 1 and plugged at the opening of the oil cavity 14, specifically may be connected to the front end cover 1 by means of a fastener such as a bolt. In the embodiment of the application, the end face of the oil pump cover 31 on the side facing away from the second stepped hole 16 is flush with the end face of the front end cover 1 on the side for being matched with a transmission

In the embodiment of the application, the oil pump cover 31 of the lubricating oil pump 3 is arranged on one side of the front end cover 1 matched with the transmission, and by placing the oil pump cover 31 of the lubricating oil pump 3 in the cavity of the transmission for assembly, compared with the technical scheme that the oil pump cover 31 is arranged on the outer side of the transmission in the related art, a sealing ring is required to be arranged to ensure that lubricating oil does not leak, as the lubricating oil pump 3 does not need an additional sealing ring, the integral structure of the lubricating oil pump 3 is more simplified, the risk of oil leakage is not easy to occur, and the integral tightness of the automobile transmission is improved.

With continued reference to fig. 1, specifically, the lubricant pump 3 further includes a driving shaft 32 disposed in the first intermediate shaft hole 13, an inner rotor 33 and an outer rotor 34, where the driving shaft 32 is disposed along the axial extension of the first intermediate shaft hole 13, the inner rotor 33 is fixed on the periphery of the driving shaft 32, and the outer rotor 34 is sleeved on the outer side of the inner rotor 33 and cooperates with the inner rotor 33 and the oil cavity 14 to form a lubricant pump 3 structure. In the embodiment of the application, along the axial direction of the first intermediate shaft hole 13, one end of the driving shaft 32 far away from the oil pump cover 31 is defined as a right connecting end, the right connecting end can extend out of the first intermediate shaft hole 13 along the axial direction of the first intermediate shaft hole 13 and penetrate through the oil pump cover 31, and the right connecting end can be connected with the intermediate shaft of the transmission by virtue of spline transmission so as to realize connection power taking and provide lubrication power for the transmission.

In the embodiment of the application, not only can a lubricating oil pump 3 be formed by the cooperation between the front end cover 1 and the oil pump cover 31, the inner rotor 33 and the outer rotor 34, but also the lubricating oil pump 3 shown in the application can drive the inner rotor 33 to rotate through the corresponding transmission intermediate shaft in the working process of the transmission, so that the outer rotor 34 outside the inner rotor 33 of the oil pump is driven to carry out forced lubrication work, and the lubricating oil pump 3 can have good lubrication effect.

In other embodiments, along the radial direction of the front end cover 1, the front end cover 1 further includes a second intermediate shaft hole 18 disposed corresponding to the first intermediate shaft hole 13, and a cavity is formed in the second intermediate shaft hole 18, so as to avoid the intermediate shaft of the transmission on the other side, and reduce the possibility of mutual interference between structures.

In some embodiments, the present application also provides a vehicle (not shown) including a front end cap assembly as in any of the embodiments described above. Compared with the front end cover assembly structure of the transmission assembly in the related art, in the embodiment of the application, the shaft cover 2 is made into a sheet metal part and is fixed with the front end cover 1 through bolts, and the lubricating oil pump 3 is arranged in the inner cavity of the transmission, namely the integrated front end cover assembly structure provided by the application can realize the light weight of the product, improve the tightness of the transmission of an automobile and solve the problem that the shaft oil seal 4 is difficult to disassemble. In addition, since the oil pump cover 31 of the lubricating oil pump 3 is placed in the transmission cavity to realize assembly, a sealing ring is not needed, and the risk of oil leakage is avoided.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims

1. A front end cover assembly, the front end cover assembly comprising:

The front end cover comprises a mounting hole for mounting the transmission input shaft and a first stepped hole formed along the periphery of the mounting hole, and the first stepped hole is used for assembling an oil seal;

A shaft cover detachably mounted on the front end cover for sealing the oil seal in the first stepped hole, and

The front end cover also comprises a first intermediate shaft hole, and the lubricating oil pump is assembled in the first intermediate shaft hole and can be connected with a transmission intermediate shaft in a transmission manner;

The front end cover is internally provided with an oil cavity and a lubricating oil duct, and the first intermediate shaft hole and the first stepped hole can be communicated with the oil cavity by means of the lubricating oil duct.

2. The front end cover assembly of claim 1, wherein the lubrication gallery includes a lubrication passage, an oil inlet passage, and an oil outlet passage, the lubrication passage communicates the first stepped bore with the oil chamber, and the oil inlet passage and the oil outlet passage are both in communication between the oil chamber and the first intermediate shaft bore.

3. The front end cover assembly of claim 1, wherein the front end cover is provided with a second stepped bore on a side thereof for engagement with a transmission, and the lubricant pump includes a pump cover disposed within the second stepped bore, the pump cover being detachably connected to the front end cover.

4. The front end cover assembly of claim 3, wherein the lubricant pump comprises a driving shaft arranged in the first intermediate shaft hole, an inner rotor coaxially fixed to the driving shaft, and an outer rotor sleeved on the periphery of the inner rotor, and the driving shaft comprises a right connecting end penetrating through the oil pump cover and capable of being in transmission connection with the transmission intermediate shaft.

5. The front end cover assembly of claim 1, further comprising a weight-reduction groove disposed along a circumferential shape of the mounting hole.

6. The front end cover assembly of claim 1, wherein the one axle cover is configured to be manufactured by a sheet metal stamping process.

7. The front end cap assembly of claim 1, wherein the one axle cap is constructed as a unitary structure.

8. The front end cover assembly of claim 1, further comprising a plurality of ribs disposed on a surface of the one axle cover, the ribs being integrally formed with the one axle cover.

9. The front end cover assembly of claim 1, further comprising a second intermediate shaft bore forming a cavity for receiving an intermediate shaft of a transmission on the other side.

10. A vehicle comprising a front end cover assembly as claimed in any one of claims 1 to 9.