CN111102343A

CN111102343A - Integrated oil level control device and transmission

Info

Publication number: CN111102343A
Application number: CN201811268258.4A
Authority: CN
Inventors: 俞正才
Original assignee: Schaeffler Technologies AG and Co KG
Current assignee: Schaeffler Technologies AG and Co KG
Priority date: 2018-10-29
Filing date: 2018-10-29
Publication date: 2020-05-05

Abstract

The present invention relates to an integrated oil level control apparatus for controlling an oil level in a transmission, and a transmission, the integrated oil level control apparatus including an oil plug that is mounted on an oil hole at a bottom of a transmission case and is capable of plugging the oil hole. In order to control the oil level in the transmission case, the integrated oil level control device further has an oil level pipe, wherein one end of the oil level pipe is fixedly connected within the oil hole, and the other end of the oil level pipe protrudes into the transmission case in the axial direction of the oil hole, wherein the height of the top opening of the other end of the oil level pipe coincides with the desired oil level of the transmission oil, so that the transmission oil higher than the desired oil level can flow into the top opening and flow out therefrom.

Description

Integrated oil level control device and transmission

Technical Field

The present invention relates to an integrated oil level control device for controlling the oil level in a transmission. The invention also relates to a transmission with the integrated oil level control device.

Background

In the prior art, the oil level in the transmission case is often controlled by an oil level plug and an oil plug. As shown in fig. 1, the oil level plug and the oil plug are provided as screw plugs connected to screw holes in the transmission case, respectively. The oil level plug has the same level as the oil level, and the oil level in the transmission can be restricted by the oil level plug, that is, when the oil level plug is removed, if the oil level is higher than a desired oil level, the oil flows out through an oil level hole in the transmission case. The oil plug is located at the bottom of the transmission case, and when the oil plug is removed, oil in the transmission oil sump is drained or even emptied through an oil plug hole in the transmission case.

However, in the prior art, the oil level stopper and the oil stopper are separately designed, and thus more connection features for mounting these components to the transmission case are required. Further, since the oil level stopper and the oil stopper are distributed at different positions, it is difficult to assemble and disassemble in practical cases. In addition, the position of the oil level hole needs to be designed in advance, and it is difficult to change the position of the oil level plug and the oil plug on the transmission case after the transmission case is cast. Further, it is difficult to check the oil level and the amount of oil before determining the position of the oil level stopper.

Disclosure of Invention

Accordingly, the technical problem to be solved by the present invention is to overcome the drawbacks of the prior art and to provide an integrated oil level control device for a transmission, which is compact, easy to install and disassemble, and easy to flexibly adjust according to a changed ideal oil level height.

According to the invention, this technical problem is solved in particular by an integrated oil level control device which controls the oil level in a transmission. The integrated oil level control device includes an oil plug that is mounted on the oil hole at the bottom of the transmission case and that is capable of plugging the oil hole. According to the present invention, the integrated oil level control device further includes an oil level pipe, wherein one end of the oil level pipe is fixedly connected to the oil hole, and the other end of the oil level pipe protrudes into the transmission housing along the axial direction of the oil hole, wherein the height of the top opening of the other end of the oil level pipe coincides with the desired oil level of the transmission oil, so that the transmission oil higher than the desired oil level can flow into the top opening, and the oil level of the transmission oil can be adjusted by using the height of the oil level pipe. In addition, an oil level plug located on the side of the transmission case is eliminated, reducing manufacturing costs. The oil hole can meet the requirements of oil filling and oil discharging at the same time, and the oil level pipe is also detachable, so that the oil level requirements for different reasons can be met by flexibly adjusting the height of the oil level pipe.

According to a preferred embodiment of the present invention, an external thread is provided on the oil plug, and an internal thread is provided in the oil hole, so that the oil plug is threadedly coupled with the oil hole. This makes it very easy to install and remove the oil plug. Preferably, a washer is provided between the oil plug and the transmission case, so that the oil plug can be screwed more firmly in the oil hole of the transmission case.

Furthermore, it is advantageous if an external thread is also provided on the oil level pipe, so that the oil level pipe can also be screwed to the oil bore. This kind of design can make oil level pipe easily install and dismantle on the one hand, and on the other hand can make oil level pipe and oilhole form sealedly to make the derailleur oil in the derailleur casing can not flow out along the junction of oil level pipe and oilhole. In order to be able to realize a screw connection, a hexagonal contour is provided in the end of the oil level pipe facing the oil plug, so that the oil level pipe can be screwed into the oil bore by means of a hexagonal tool. It is further preferred that a fastening hole is provided in the end face of the oil plug facing away from the oil level pipe, which fastening hole has exactly the same shape as the contour of the oil level pipe, i.e. for example also has a hexagonal shape, so that the oil plug can be screwed into the oil bore with the same hexagonal tool. Of course, other shapes and contours are also contemplated, as long as the screwing is facilitated by a particular tool.

According to a further preferred embodiment of the present invention, the oil hole is divided in an axial direction into a first section for connection with the oil plug and a second section for connection with the oil level pipe, and an inner diameter of the second section is smaller than that of the first section, thereby enabling easy installation of the oil level pipe. It is further preferred that a flange is provided on the end of the oil level pipe facing the oil plug, which flange rests against the second section, so that the axial position of the oil level pipe can be defined. It is also preferred that the oil level pipe is designed integrally with the oil plug, and that a through-hole is provided in the middle of the oil plug, which through-hole is closed by a sealing plug. For example, the second section may have an inner diameter equal to the inner diameter of the first section, and the oil level pipe may extend from the top of the oil plug, which may make installation and removal of the integrated oil level control device easier. The oil plug is provided with a through hole which is mainly used for filling oil or guiding excessive transmission oil out, and the through hole is sealed by a sealing plug after enough transmission oil is filled into the transmission housing.

In a further preferred embodiment according to the invention, the oil level pipe is made of plastic. The shape of the oil level pipe can be easily changed, so that the oil level control device can be flexibly adjusted accordingly when the ideal oil level is changed.

The above-described technique is also solved by a transmission including an integrated oil level control device having the above-described technical features.

Drawings

Preferred embodiments of the invention are schematically illustrated by the figures below. The attached drawings are as follows:

figure 1 is a schematic view of an oil level control device according to the prior art,

fig. 2 is a schematic diagram of an integrated oil level control apparatus according to the present invention.

Identical or functionally equivalent parts are provided with the same reference signs.

Detailed Description

Fig. 1 schematically shows an oil level control device according to the prior art. As shown in the drawing, the oil level control device has an oil plug 1 for opening and closing an oil outlet of a transmission and an oil plug 7 for opening and closing an oil inlet of the transmission, wherein the oil plug 1 is provided at the bottom of a transmission case 3, the oil plug 7 is provided at a side of the transmission case 3, and the height of the oil inlet from the bottom of the transmission is flush with an ideal oil level 6 of transmission oil 4, so that the oil level of the transmission can be controlled. The oil plug 1 and the oil plug 7 are designed as identical parts, screwed to the transmission housing 3 by means of

gaskets

2 and 8, respectively. Since the position of the oil inlet hole is already fixed, only transmission oil lower than the oil inlet hole can be injected into the transmission case, and the flexibility of adjustment is limited. If the amount of oil in the transmission is to be changed (increased), the position of the oil inlet hole must be changed. Further, since the oil inlet hole is provided on the side wall of the transmission case, it is inconvenient to inject the transmission oil into the transmission case.

Fig. 2 shows an integrated oil level control apparatus according to the present invention. The integrated oil level control apparatus according to the present embodiment has an oil plug 1 and an oil level pipe 5, wherein both the oil plug 1 and the oil level pipe 5 are disposed in an oil hole 6 at the bottom of a transmission case 3. Preferably, the oil plug 1 and the oil level pipe 5 are both provided with external threads, and the oil hole 6 is provided with internal threads, which are connected by threads. A gasket 2 is also provided between the oil plug 1 and the transmission housing 3. The oil hole 6 may be axially divided into a first section connected to the oil plug 1 and a second section connected to the oil level pipe 5, wherein the second section has an inner diameter smaller than the first section. The oil level pipe 5 has a flange at one end that can be snapped at the junction of the first and second sections of the oil holes 6, thereby defining the location of the oil level pipe. The other end of the oil level pipe 5 protrudes into the transmission case 3, and has an inclined top opening at the end thereof, the height of which from the bottom of the transmission case 3 corresponds to the desired oil level of the transmission oil 4, so that the oil level of the transmission oil 4 can be adjusted using the length of the oil level pipe 5. Inside the end of the oil level pipe 5 having the flange, there is provided a shape profile provided with a special shape, preferably a shape profile having a hexagonal shape, for screwing the oil level pipe 5 into the oil hole 6 by means of a hexagonal tool. A fastening hole having a special shape, preferably a hexagonal shape having the same size as the oil level pipe 5, is also provided on the outer end surface of the oil plug 2, so that the oil plug 2 and the oil level pipe 5 can be attached and detached by the same hexagonal tool.

When assembling the integrated oil level control device, the oil level pipe 5 is first screwed into the oil hole 6 of the transmission case 3, for example, the oil level pipe 5 is screwed by a hexagonal tool; then, the transmission oil 4 is injected into the transmission case 3 through the oil level pipe 5, the height of the oil level pipe 5 is in accordance with the desired oil level of the transmission oil 4 desired to be injected, and if the injected transmission oil 4 has reached the desired oil level and the injection is continued, the excessive transmission oil 4 flows into the oil level pipe 5 through the top opening of the oil level pipe 5 and flows out; next, after the oil injection is completed, the washer 2 and the oil plug 1 are screwed into the oil hole 6 by a hexagonal tool for closing the oil hole 6.

Although possible embodiments have been described by way of example in the above description, it should be understood that numerous embodiment variations exist, still by way of combination of all technical features and embodiments that are known and that are obvious to a person skilled in the art. It should also be appreciated that the exemplary embodiment or exemplary embodiments are only examples, and are not intended to limit the scope, applicability, or configuration of the invention in any way. From the foregoing description, one of ordinary skill in the art will more particularly provide a technical guide to convert at least one exemplary embodiment, wherein various changes may be made, particularly in matters of function and structure of the components described, without departing from the scope of the following claims.

List of reference numerals

1 oil plug

2 gasket

3 Transmission housing

4 transmission oil

5 oil level pipe

6 oil hole

7 oil level stopper

8 gasket

Claims

1. An integrated oil level control device for controlling an oil level in a transmission, the integrated oil level control device comprising an oil plug (1), the oil plug (1) being mounted on an oil hole (6) at a bottom of a transmission case (3) and capable of blocking the oil hole (6),

it is characterized in that the preparation method is characterized in that,

the integrated oil level control device further has an oil level pipe (5), wherein one end of the oil level pipe (5) is fixedly connected within the oil hole (6), and the other end of the oil level pipe (5) protrudes into the transmission housing (3) in the axial direction of the oil hole (6), wherein the height of the top opening of the other end of the oil level pipe (5) coincides with an ideal oil level of the transmission oil (4) such that the transmission oil higher than the ideal oil level can flow into the top opening.

2. The integrated oil level control device according to claim 1, wherein an external thread is provided on the oil plug (1), and the oil plug (1) is screwed with the oil hole (6).

3. The integrated oil level control device according to claim 2, wherein an external thread is provided on the oil level pipe (5), and the oil level pipe (5) is screwed with the oil hole (6).

4. The integrated oil level control device according to claim 3, characterized in that a hexagonal-shaped profile is provided in an end of the oil level pipe (5) facing the oil plug (1).

5. The integrated oil level control device according to claim 4, characterized in that a fastening hole having exactly the same shape as the shape profile is provided on an end surface of the oil plug (1) facing away from the oil level pipe (5).

6. The integrated oil level control device according to claim 1, wherein the oil hole (6) is divided in an axial direction into a first section for accommodating the oil plug (1) and a second section for accommodating the oil level pipe (5), the second section having an inner diameter smaller than that of the first section.

7. The integrated oil level control device according to claim 6, wherein a flange is provided on the end of the oil level pipe (5) facing the oil plug (1), said flange abutting against the second section.

8. The integrated oil level control device according to claim 1, wherein the oil level pipe (5) is designed integrally with the oil plug (1), wherein a through hole is provided in the middle of the oil plug in the axial direction.

9. The integrated oil level control device according to claim 1, wherein a gasket (2) is provided between the oil plug (1) and the transmission housing (3).

10. A transmission having an integrated oil level control device according to any preceding claim.