Patent Application
20240309935
The present application claims priority to Korean Patent Application No. 10-2023-0034443, filed Mar. 16, 2023, the entire contents of which is incorporated herein for all purposes by this reference.
The present disclosure relates to a hydraulic mount, and more particularly, a bush-type hydraulic mount for electric vehicles.
Recently, research on an electric vehicle which is an eco-friendly vehicle is being actively conducted. An electric vehicle is driven by a motor instead of a conventional internal combustion engine and is supplied with power from a chargeable battery rather than petroleum fuel.
A power electronics (PE) module is generally mounted at the rear wheels of electric vehicles, which may cause a sense of remaining vibration generated when an electric vehicle goes over a bump. Mounts that have damping in the front and rear direction and the up and down direction of a vehicle are applied to solve the present problem. Such mounts are advantageous in reducing a sense of remaining vibration, but the dynamic characteristic increases for the characteristics of a hydraulic mount in comparison to a rubber mount, so that the noise, vibration & harshness (NVH) performance greatly deteriorates in many cases. Whine noise may be produced, for example.
The information included in this Background of the present disclosure is only for enhancement of understanding of the general background of the present disclosure and may not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Various aspects of the present disclosure are directed to providing a bush-type hydraulic mount that can improve a high frequency dynamic characteristic together with damping performance.
The objectives of the present disclosure are not limited to those described above and other objectives not stated herein would be apparently understood by those having ordinary skill in the art that the present disclosure belongs to (hereafter, “those skilled in the art”) from the following description.
The features of the present disclosure for achieving the objectives of the present disclosure and performing the characteristic functions of the present disclosure to be described below are as follows.
According to an exemplary embodiment of the present disclosure, a bush-type hydraulic mount includes: an internal pipe: an external pipe disposed outside the internal pipe; and a main rubber formed between the internal pipe and the external pipe. The main rubber includes a plurality of fluid chambers filled with fluid and configured to fluidically-communicate with each other, and the main rubber includes a void formed through the main rubber.
According to an exemplary embodiment of the present disclosure, a method of manufacturing a bush-type hydraulic mount including an internal pipe and a main rubber formed outside the internal pipe and including four fluid chambers includes: disposing a first mold configured to form a first fluid chamber and a second fluid chamber of the four fluid chambers; and disposing a second mold configured to form a third fluid chamber and a fourth fluid chamber of the four fluid chambers.
According to an exemplary embodiment of the present disclosure, there is provided a bush-type hydraulic mount having not only improved damping performance but an improved high-frequency dynamic characteristic.
Effects of the present disclosure are not limited to those described above and other effects may be clearly recognized by those skilled in the art from the following description.
The methods and apparatuses of the present disclosure have other features and advantages which will be apparent from or are set forth in more detail in the accompanying drawings, which are incorporated herein, and the following Detailed Description, which together serve to explain certain principles of the present disclosure.
It may be understood that the appended drawings are not necessarily to scale, presenting a somewhat simplified representation of various features illustrative of the basic principles of the present disclosure. The predetermined design features of the present disclosure as included herein, including, for example, specific dimensions, orientations, locations, and shapes will be determined in part by the particularly intended application and use environment.
In the figures, reference numbers refer to the same or equivalent portions of the present disclosure throughout the several figures of the drawing.
Reference will now be made in detail to various embodiments of the present disclosure(s), examples of which are illustrated in the accompanying drawings and described below. While the present disclosure(s) will be described in conjunction with exemplary embodiments of the present disclosure, it will be understood that the present description is not intended to limit the present disclosure(s) to those exemplary embodiments of the present disclosure. On the other hand, the present disclosure(s) is/are intended to cover not only the exemplary embodiments of the present disclosure, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the present disclosure as defined by the appended claims.
Description of specific structures and functions included in embodiments of the present disclosure is only an example for describing the exemplary embodiments according to the concept of the present disclosure and the exemplary embodiments according to the concept of the present disclosure may be implemented in various ways. The present disclosure is not limited to the exemplary embodiments described herein and should be construed as including all changes, equivalents, and replacements that are included in the spirit and the range of the present disclosure.
Although the terms first and/or second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another element. For instance, a first element discussed below could be termed a second element without departing from the right range of the present disclosure. Similarly, the second element could also be termed the first element.
It is to be understood that when one element is referred to as being “connected to” or “coupled to” another element, it may be directly connected to or directly coupled to another element or be connected to or coupled to another element, including the other element intervening therebetween. On the other hand, it is to be understood that when one element is referred to as being “directly connected to” or “directly coupled to” another element, it may be connected to or coupled to another element without the other element intervening therebetween. Furthermore, the terms used herein to describe a relationship between elements, that is, “between,” “directly between,” “adjacent,” or “directly adjacent” should be interpreted in the same manner as those described above.
Like reference numerals indicate the same components throughout the specification. The terms used herein are provided to describe embodiments without limiting the present disclosure. In the specification, a singular form includes a plural form unless specifically stated in the sentences. The terms “comprise” and/or “comprising” used herein do not exclude that another component, step, operation, and/or element exist or are added in the stated component, step, operation, and/or element.
The present disclosure will be described hereafter in detail with reference to the accompanying drawings.
An electric vehicle V includes a motor that generates driving power and a power electronics (PE) module that supplies electricity to the motor. Hereafter, these in combination are referred to as a PE module 810.
The PE module 810 is mounted on a vehicle body generally through a bush-type rubber mount. The PE module 810 may be mounted at all of the front wheels and the rear wheels of the electric vehicle V, so that the hydraulic mount according to an exemplary embodiment of the present disclosure may be mounted for any of front wheels and rear wheels.
For example, when the PE module 810 is mounted at a rear wheel, as shown in
Accordingly, the present disclosure intends to provide a bush-type hydraulic mount that has damping in two directions of a front and rear direction (y direction) and an up and down direction (z direction). The bush-type hydraulic mount according to an exemplary embodiment of the present disclosure is a mount that has damping in two directions of a front and rear direction (y direction) and an up and down direction (z direction) and enables front and rear behavior control and weight-directional behavior control of the electric vehicle V.
The bush-type hydraulic mount 1 according to an exemplary embodiment of the present disclosure is a mount including a rubber filled with a fluid. In detail, as shown in
The internal pipe 20 is coupled to the PE module 810 and is configured to connect the PE module 810 with the rear sub-frame 800. The internal pipe 20 may be coupled to the PE module 810 through a fastener, such as a bolt. The internal pipe 20 may be formed in a tube shape including a hole 22 therein and may be made of metal.
The main rubber 40 made of rubber is formed on the external circumferential surface of the internal pipe 20. For example, the main rubber 40 may be formed on the external circumferential surface of the internal pipe 20 through vulcanization molding.
The main rubber 40 may be formed through vulcanization molding between the internal pipe 20 and a middle pipe 80 disposed coaxially with the internal pipe 20. The middle pipe 80 is surrounded by the main rubber 40 and may be made of metal. The middle pipe 80 may be formed in a tube shape including a plurality of openings to secure spaces in which fluid chambers 140, 240, 340, 440 of the main rubber 40 are disposed.
Referring to
As shown in
As shown in
The main rubber 40 may include a flap 42. The flap 42 circumferentially extends between the internal pipe 20 and the external pipe 60. In an exemplary embodiment of the present disclosure, the flap 42 may circumferentially extend a predetermined distance.
The external pipe 60 is disposed at an external side of the nozzles 100a, 100b. The external pipe 60 is disposed to seal the nozzles 100a, 100b or the channels 102, 104. The external pipe 60 may be configured in a tube type sealing the nozzles 100a, 100b disposed on the external circumferential surface of the main rubber 40.
Referring to
As described above, the hydraulic mount 1 includes four fluid chambers 140, 240, 340, 440. When four molds are used to form the four fluid chambers 140, 240, 340, 440, it is difficult to vulcanize rubber. Accordingly, the preset disclosure may apply only two molds 600a, 600b by applying a diagonal symmetric structure. Therefore, a total of four molds which include two molds in the axial direction (directions P1 and P2) and two molds in a diagonal direction (directions P3 and P4) may be used for the hydraulic mount 1. According to an exemplary embodiment of the present disclosure, the number of molds decreases from six to four in comparison to the related art, so it is possible to improve workability and reduce the cost.
In
In
The hydraulic mount according to an exemplary embodiment of the present disclosure may be applied to a vehicle. The hydraulic mount may be applied as a mount for a PE module and a motor of an electric vehicle. However, the hydraulic mount according to an exemplary embodiment of the present disclosure may be applied not only to a pure electric vehicle, but to a hybrid electric vehicle and a plug-in hybrid electric vehicle and may be applied as a mount for an engine vehicle.
The hydraulic mount 1 according to an exemplary embodiment of the present disclosure can provide an effect of not only reducing a sense of remaining vibration due to uneven road conditions, such as bumps but reducing driving vibration in high-speed driving.
Furthermore, the hydraulic mount 1 according to an exemplary embodiment of the present disclosure can maximize a damping effect and perform damping in two directions of up and down and left and right directions by applying nozzles including channels. Furthermore, because damping is possible in two directions, there is an advantage that the hydraulic mount 1 may be applied to an electric vehicle V regardless of the fitting direction of a PE module.
According to an exemplary embodiment of the present disclosure, the void can improve durability and greatly improve the dynamic characteristic. Furthermore, because a bulge type internal pipe is applied, the high-frequency dynamic characteristic may be additionally improved.
For convenience in explanation and accurate definition in the appended claims, the terms “upper”, “lower”, “inner”, “outer”, “up”, “down”, “upwards”, “downwards”, “front”, “rear”, “back”, “inside”, “outside”, “inwardly”, “outwardly”, “interior”, “exterior”, “internal”, “external”, “forwards”, and “backwards” are used to describe features of the exemplary embodiments with reference to the positions of such features as displayed in the figures. It will be further understood that the term “connect” or its derivatives refer both to direct and indirect connection.
The term “and/or” may include a combination of a plurality of related listed items or any of a plurality of related listed items. For example, “A and/or B” includes all three cases such as “A”, “B”, and “A and B”.
In the present specification, unless stated otherwise, a singular expression includes a plural expression unless the context clearly indicates otherwise.
In exemplary embodiments of the present disclosure, “at least one of A and B” may refer to “at least one of A or B” or “at least one of combinations of one or more of A and B”. In addition, “one or more of A and B” may refer to “one or more of A or B” or “one or more of combinations of one or more of A and B”.
In the exemplary embodiment of the present disclosure, it should be understood that a term such as “include” or “have” is directed to designate that the features, numbers, steps, operations, elements, parts, or combinations thereof described in the specification are present, and does not preclude the possibility of addition or presence of one or more other features, numbers, steps, operations, elements, parts, or combinations thereof.
The foregoing descriptions of specific exemplary embodiments of the present disclosure have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the present disclosure to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teachings. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and their practical application, to enable others skilled in the art to make and utilize various exemplary embodiments of the present disclosure, as well as various alternatives and modifications thereof. It is intended that the scope of the present disclosure be defined by the Claims appended hereto and their equivalents.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2023-0034443 | Mar 2023 | JP | national |
