Lubricant supply system

Abstract

Lubrication supply system mounted on an engine, comprising: a carrier having an insertion hole formed in its central portion and in which a carrier bearing, which is one of the parts of the engine, is inserted into the insertion hole; an oil flow path inserted into a housing of the engine; and an oil guide coupled to the carrier and directing a flow of lubricant, wherein the carrier has a surface facing the housing and the oil flow path has an outlet arranged to face one surface of the carrier so that lubricant is sprayed onto the oil guide coupled to the carrier.

Description

Background of RevelationArea of ​​Revelation

[0001] The present disclosure relates to a lubricant supply system, and more particularly to a lubricant supply system applied to an engine for a vehicle. Description of the state of the art

[0002] Unlike conventional off-axis rotors, a motor reducer with an axial rotor, in which a drive shaft is inserted into the center section of a rotor shaft, cannot form an oil flow path at the center section of the rotor. Therefore, oil must be supplied only by rotation (swirling), and it is difficult to lubricate each bearing included in the reducer by swirling alone. Accordingly, the axial rotor must form a separate oil lubrication path in a different shape than conventional rotors to forcibly supply and lubricate the reducer components with oil. This poses problems because the required specifications of an oil supply pump are higher and its dimensions are larger.

[0003] In particular, in the case of conventional swirl methods, since a lubricant remains only at a periphery and not at the internal parts of the motor and reducer due to centrifugal force and wind force generated by a rapidly rotating planetary gear, there is a problem that the lubricant is not supplied to a bearing located at a central portion. Furthermore, even if a forced lubrication flow path is provided in the motor rotor, there is a problem that the lubricant is only supplied to some parts and the oil is not supplied to a needle bearing therein. State of the art document

[0004] [Patent Document 1] Korean Patent Laid-Open No. 10-2024-0087229, entitled “Reducer for electric vehicle,” published on December 12, 2022. Summary of Revelation

[0005] The present disclosure has been made in an effort to solve the above-mentioned problems and aims to provide a lubricant supply system comprising a carrier that fixes a carrier bearing adjacent to a needle bearing to a motor housing, secures a flow path along which lubricant is supplied to a surface of the carrier, and includes an oil guide that stores the supplied lubricant at high speed and supplies the lubricant to other parts at low speed, thereby minimizing forced lubrication compared to conventional lubricant supply systems and evenly supplying oil to the needle bearing and the carrier bearing even at high speed by means of centrifugal force and wind force naturally generated by an axial rotor.

[0006] To solve the above problems, an engine-mounted lubricant supply system according to an embodiment of the present disclosure includes a carrier having an insertion hole formed in its central portion and in which a carrier bearing, which is one of parts of the engine, is inserted into the insertion hole, an oil flow path inserted into a housing of the engine, and an oil guide coupled to the carrier and guiding a flow of lubricant, wherein the carrier has a surface facing the housing, and the oil flow path has an outlet arranged to face the one surface of the carrier so that lubricant is sprayed onto the oil guide coupled to the carrier.

[0007] Furthermore, the oil flow path includes a main flow path connected to a pump that supplies lubricant and formed to extend in a radial direction of the motor, and a forced lubrication reducing flow path formed to extend from the main flow path toward the one surface of the carrier.

[0008] In addition, the oil guide is coupled to one surface of the carrier and is coupled at a position where lubricant is taken in from the flow path to reduce forced lubrication.

[0009] Furthermore, the oil guide includes a fixed part inserted into and connected to the carrier and in which a hole-bearing guide flow path along which lubricant flows is perforated at its central portion, and an oil collecting part formed to extend from the fixed part and collect lubricant when the engine rotates.

[0010] In addition, the guide flow path at an end portion of the oil collecting part side has an inclined surface that is not parallel to an axial direction and a radial direction of the engine.

[0011] Furthermore, the carrier is coupled to a pin in which an oil storage flow path in which lubricant is stored is formed to extend in an axial direction of the engine, and the oil guide has the fixed part inserted into the oil storage flow path of the pin.

[0012] In addition, the oil guide is formed integrally with the pin.

[0013] In addition, the pin includes an open groove open with a larger cross-sectional area than the oil storage flow path, formed at one end to which the oil guide is coupled, and communicating with the oil storage flow path.

[0014] Furthermore, the oil collection part includes a first extension, one end of which is connected to one end of the fixed part and is formed to extend in a radial direction of the engine to come into contact with the one surface of the carrier, a second extension formed to extend from the first extension in the axial direction of the engine, and a third extension formed to extend from the second extension and formed to extend such that one end is positioned in a region where the guide flow path is formed.

[0015] In addition, the third extension is designed to extend obliquely so as not to be parallel to the axial direction and radial direction of the motor.

[0016] Furthermore, the oil collecting part includes a fourth extension, one end of which is connected to one end of the fixed part and is formed to extend flatly in a radial direction of the engine to come into contact with the one surface of the carrier, and a fifth extension formed to extend from the fourth extension and formed to extend such that one end is positioned in a region where the guide flow path is formed.

[0017] In addition, the fifth extension is designed to extend obliquely so as not to be parallel to the axial direction and radial direction of the motor. Brief description of the drawings Fig. 1 is a partial cross-sectional view showing an internal structure of an engine to which a lubricant supply system of the present disclosure is applied. Fig. 2 is a partial cross-sectional view showing an oil supply flow path of the present disclosure. Fig. 3 is a partial perspective view showing the oil supply flow path of the present disclosure. Fig. 4 is a perspective view showing an oil guide of the present disclosure. Fig. 5 is a partial cross-sectional view showing a coupling relationship between the oil guide and a coupling part of the present disclosure. Fig. 6 is a partial plan view showing the oil guide of the present disclosure. Fig. 7 is a partial plan view showing one embodiment of the oil guide of the present disclosure. Detailed description of the revelation

[0018] The technical idea of ​​the present disclosure will be explained in more detail below with reference to the accompanying drawings. Prior to this, the terms and words used in this description and the claims are not limited to their common or lexical meanings, but are to be understood as meanings and concepts that correspond to the technical idea of ​​the present disclosure, based on the principle that the inventor can appropriately define the concepts of the terms to best describe his or her own disclosure.

[0019] The following is based on reference to Fig. 1 briefly describes the internal structure of an engine to which a lubricant supply system 1000 of the present disclosure is applied.

[0020] The lubricant supply system 1000 of the present invention can be mounted on a motor to supply lubricant to parts of a reduction gear, and may include a carrier 100 in which an insertion hole 120 is formed at a central portion, and a carrier bearing C, which is one of the parts of the motor, is inserted into the insertion hole 120, and an oil flow path 200 is inserted into a housing H of the motor. A lubricant can be supplied from a pump to the inside and outside of the housing H of the motor via the oil flow path 200, and the reduction gear of the motor can be forcibly lubricated via the oil flow path 200. The carrier 100 may have a surface facing the motor housing H, and the oil flow path 200 may have an outlet arranged to face one surface of the carrier 100 so that lubricant is sprayed onto one surface of the carrier 100.

[0021] Furthermore, the lubricant supply system 1000 of the present disclosure may include a guide coupled to the carrier 100 and distributing the lubricant. The oil guide 300 may store some lubricant using centrifugal force when the engine rotates at high speed, and distribute the lubricant using gravity at low speeds to internal parts of the reduction gear and a number of bearings (such as a needle bearing N) positioned in the center of the engine.

[0022] By supplying a small amount of forced lubrication oil to the carrier 100, storing the oil through the oil guide 300, and distributing the lubricant to all parts of the reducer, all parts can be lubricated even if they don't fully rely on forced lubrication, and the flow volume required for forced lubrication can be minimized. Even if the required specifications of the oil pump are lower, every part of the reducer can still be easily lubricated.

[0023] In the following, the oil flow path 200 of the present disclosure will be described with reference to Fig. 2 and Fig. 3 described in more detail.

[0024] More specifically, the oil flow path 200, as shown in the Fig. 2 and Fig. 3, a main flow path 210 and a forced lubrication reduction flow path 220. In particular, the main flow path 210 may be connected to the pump that supplies lubricant, may be configured to extend in a radial direction of the motor, and may have at least one outlet through which the lubricant is sprayed toward an edge of the motor. The lubricant may be forcibly injected through the main flow path 210, so that each part of the transmission is forcibly lubricated.

[0025] Furthermore, the forced lubrication reducing flow path 220 may be formed to extend from the main flow path 210 to a surface of the carrier 100. The forced lubrication reducing flow path 220 may be formed to communicate in a straight line, and one end, that is, an outlet, may be formed to face a surface of the carrier 100. By including the forced lubrication reducing flow path 220, a portion of the lubricant can be supplied to the carrier 100, and the lubricant can be supplied more efficiently to the parts located in the central portion through the carrier 100. Accordingly, the lubricant can be supplied to all parts even if the pump that supplies lubricant does not supply oil at a high flow rate.

[0026] In the following, the oil guide 300 of the present disclosure will be described with reference to the Fig. 4 to 7 are described in more detail.

[0027] As in Fig. As shown in Figure 4, the oil guide 300 may include a fixed part 310 and an oil collection part 320. Specifically, the fixed part 310 may be inserted into and coupled to the carrier 100, a hole-bearing guide flow path 311 along which lubricant flows may be perforated at its central portion, and the oil collection part 320 may be formed to extend from the fixed part 310 and be formed in a "⊂" shape to store the lubricant when the engine rotates.

[0028] In this case, as in Fig. 5, the oil guide 300 may be coupled to a surface of the carrier 100 and mounted at a position corresponding to the forced lubrication reducing flow path 220. Accordingly, the lubricant can be smoothly received by the forced lubrication reducing flow path 220. A distance between the fixed part 310 and the center of the motor may be the same as a distance between the forced lubrication reducing flow path 220 and the center of the motor, within a predetermined error range.

[0029] As in Fig. 5, the carrier 100 may further be coupled to a pin 110 in which an oil storage flow path 111 in which lubricant is stored extends in an axial direction of the engine. The oil guide 300 may include the fixed part 310 inserted into the oil storage flow path 111 of the pin 110. Accordingly, the lubricant collected by the oil guide 300 can be stored in the oil storage flow path 111 of the pin 110. The oil storage flow path 111 may have a groove shape in which one end that comes into contact with a surface of the carrier 100 is open and the other end is closed. Accordingly, the lubricant collected from the forced lubrication reducing flow path 220 by the oil guide 300 can be easily collected and stored.Furthermore, the oil storage flow path 111 may further include an open groove 112 having a larger flow area than the oil storage flow path 111 and formed at one end thereof. The open groove 112 may serve as a funnel and more evenly receive the lubricant from the flow path to reduce forced lubrication 220 through the large opening. At least a portion of the open groove 112 may be closed by the oil collection portion 320 of the oil guide 300.

[0030] In this case, the oil guide 300 and the pin 110 can be manufactured and formed separately from the carrier 100 and then coupled to the carrier 100. Accordingly, the lubricating oil supply system 1000 of the present invention can be easily applied without additional machining of the carrier 100. For example, the oil guide 300 and the pin 110 can be formed from the same material and manufactured integrally with each other. Accordingly, it is possible to increase the ease of assembly of the lubricating oil supply system 1000 of the present invention.

[0031] In addition, as in Fig. 6, the oil collecting part 320 preferably includes a first extension 321 having one end connected to one end of the fixed part 310 and formed to extend in the radial direction of the engine to contact with one surface of the carrier 100, a second extension 322 formed to extend from the first extension 321 in the axial direction of the engine, and a third extension 323 formed to extend from the second extension 322 and formed to extend so that one end is positioned in a region where the guide flow path 311 is formed. Accordingly, oil can be collected and stored in a space surrounded by the first extension 321, the second extension 322, and the third extension 323.

[0032] In this case, the guide flow path 311 may have an inclined surface 312 at an end portion of the oil collection part 320 that is not parallel to the axial and radial directions of the engine. By including the inclined surface 312, it is possible to prevent a small amount of lubricant from remaining at an end portion of the guide flow path 311 when it is not lubricated. In addition, lubricant can be sprayed onto the inclined surface 312 of the guide flow path 311 that is not covered by the third extension 323, lubricant can be reflected from the inclined surface 312, and the lubricant can be forwarded to the oil storage flow path 111 inside the oil collection part 320 or the pin 110.In addition, when the lubricant stored in the oil collecting part 320 is transferred into the guide flow path 311 and the oil storage flow path 111, the lubricant can be transferred without loss through the inclined surface 312 because the inclined surface 312 is included in the center even if the first extension 321 and the guide flow path 311 are formed in a direction perpendicular to each other.

[0033] Alternatively, in one embodiment, the oil collection member 320 comprises Fig.7, preferably, a fourth extension 324 having one end connected to the end of the fixed part 310 and configured to extend flatly in the radial direction of the motor to contact a surface of the carrier 100, and a fifth extension 325 configured to extend from the fourth extension 324 and configured to have one end positioned in a region where the guide flow path 311 is formed. Unlike the rotor plate / oil distributor of the rotor, the fifth extension 325 of the oil collecting part 320 can collect the oil dispersed by centrifugal force because the reduction gear has an oil spray target point included in the carrier and rotates with it.Furthermore, even if the pin serving as the oil spray target comes into contact with an inner surface of the fourth extension 324 of the oil collecting part 320, the oil can be evenly supplied to three needle pins. In this case, the oil collecting part 320 can be firmly seated in the open groove 112.

[0034] Furthermore, the third extension 323 or the fifth extension 325 may be formed to extend obliquely so that they are not parallel to the axial and radial directions of the engine. Accordingly, it is possible to extend the residence time of the lubricant on a wall surface of the third extension 323 or the fifth extension 325 and enable the oil collection part 320 to better retain the lubricant.

[0035] According to the lubricant supply system of the present disclosure having the above-described configuration, by including the carrier that fixes the carrier bearing adjacent to the needle bearing to the motor housing, securing the flow path along which the lubricant is supplied to one surface of the carrier, and including the oil guide that stores the supplied lubricant at high speed and supplies the lubricant to other parts at low speed, it is possible to minimize forced lubrication compared to conventional lubricant supply systems and to evenly supply oil to the needle bearing and the carrier bearing even at high speed by utilizing centrifugal force and wind force naturally generated by the axial rotors.

[0036] The technical concept of the present disclosure is not limited to the embodiments described above. The scope of application is diverse, and those skilled in the art may also make various modifications without departing from the gist of the present disclosure as defined in the claims. Therefore, these improvements and modifications fall within the scope of the present disclosure, provided they are obvious to those skilled in the art. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] KR 10-2024-0087229

[0004]

Claims

[1] A lubricant supply system mounted on an engine, comprising: a carrier having an insertion hole formed in its central portion and in which a carrier bearing, which is one of the parts of the engine, is inserted into the insertion hole; an oil flow path inserted into a housing of the engine; and an oil guide coupled to the carrier and directing a flow of lubricant, wherein the carrier has a surface facing the housing and the oil flow path has an outlet arranged to face one surface of the carrier so that lubricant is sprayed onto the oil guide coupled to the carrier. [2] A lubricant supply system according to claim 1, wherein the oil flow path comprises: a main flow path connected to a pump that supplies lubricant and formed to extend in a radial direction of the motor; and a forced lubrication reducing flow path formed to extend from the main flow path toward one surface of the carrier. [3] The lubricant supply system according to claim 2, wherein the oil guide is coupled to the one surface of the carrier and is coupled at a position where lubricant is received from the flow path to reduce forced lubrication. [4] Lubricant supply system according to one of claims 1 to 3, wherein the oil guide comprises: a fixed part inserted into and connected to the carrier and in which a hole-bearing guide flow path along which lubricant flows is perforated at its central portion; and an oil collecting part configured to extend from the stationary part and collect lubricant as the engine rotates. [5] The lubricant supply system according to claim 4, wherein the guide flow path has an inclined surface at an end portion of the oil collecting part side that is not parallel to an axial direction and a radial direction of the engine. [6] The lubricant supply system according to claim 4 or 5, wherein the carrier is coupled to a pin in which an oil storage flow path in which lubricant is stored is formed to extend in an axial direction of the engine, and the fixed member is inserted into the oil storage flow path of the pin. [7] Lubricant supply system according to claim 6, wherein the oil guide is formed integrally with the pin. [8] A lubricant supply system according to claim 6 or 7, wherein the pin comprises an open groove open with a larger cross-sectional area than the oil storage flow path, formed at one end to which the oil guide is coupled, and communicating with the oil storage flow path. [9] Lubricant supply system according to one of claims 4 to 8, wherein the oil collecting part comprises: a first extension having one end connected to one end of the fixed part and formed to extend in a radial direction of the motor to come into contact with the one surface of the carrier; a second extension configured to extend from the first extension in the axial direction of the motor; and a third extension configured to extend from the second extension and configured to extend such that one end is positioned in a region in which the guide flow path is formed. [10] The lubricant supply system according to claim 9, wherein the third extension is formed to extend obliquely so as not to be parallel to the axial direction and radial direction of the engine. [11] Lubricant supply system according to one of claims 4 to 10, wherein the oil collecting part comprises: a fourth extension having one end connected to one end of the fixed part and formed to extend flatly in a radial direction of the motor to come into contact with the one surface of the support; and a fifth extension configured to extend from the fourth extension and configured to extend such that one end is positioned in a region in which the guide flow path is formed. [12] The lubricant supply system according to claim 11, wherein the fifth extension is formed to extend obliquely so as not to be parallel to the axial direction and radial direction of the engine.

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