Nested bearing seat structure of electric turbocharger
By casting cavities on the motor side and casting the bearing seat on the body, combined with the design of the reinforcement ring and anti -off -parting components, the fixed connection of the nested bearing seat structure is realized, and the high manufacturing costs in the existing technologies are high and complicated in assembly. The problem reduces the assembly cost and improves the stability of the connection.
Patent Information
- Application Number
- CN202420606210.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-03-27
AI Technical Summary
The bearing seat structure of existing electric turbochargers is complex, resulting in high manufacturing costs, many assembly steps and high assembly costs.
The structure of the luster bearing seat is used, the motor cover has the casting cavity, the bearing seat body is cast in the casting cavity, and the fixed connection is achieved by reinforcement ring and anti -off -parting parts. The assembly steps are omitted.
It reduces the manufacturing cost, reduces the assembly steps and assembly costs, while improving the firmness of the connection.
Smart Images
Figure CN222415003U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of turbocharging, in particular to a nested bearing seat structure of an electric turbocharger. Background Art
[0002] The electric turbocharger uses an electric motor to directly drive the compressor instead of relying on the energy of the exhaust gas. Since the speed of the motor can be adjusted independently of the engine speed, the best boost effect can be achieved throughout the engine speed range.
[0003] The motor used in the electric turbocharger is a high-speed motor, and its structure includes a motor stator and a motor rotor. The two ends of the motor rotor are rotatably arranged in bearings respectively, and the maximum speed of the motor rotor can reach 90krpm; one end of the motor rotor is the output end, and the output end is connected to a turbine. When working, the motor rotor drives the turbine to rotate, thereby pressing the air into the engine through the volute through the turbine; in the prior art, the bearing seat structure at the output end of the motor rotor is generally a motor end cover, and a bearing seat body separately arranged on the motor end cover. Since the motor rotor itself has a high speed and the output end is loaded with a turbine, the separately arranged motor end cover and the bearing seat body need to adopt complex matching methods and fasteners to prevent loosening. Under this split setting, the two require independent molds during manufacturing, resulting in high manufacturing costs. During assembly, there are many installation steps to achieve the mutual connection between the two, and the assembly cost is high. Utility Model Content
[0004] The problem to be solved by the utility model is to provide a nested bearing seat structure of an electric turbocharger with low manufacturing cost, fewer installation steps and low assembly cost.
[0005] The technical solution adopted by the utility model to solve the above problems is: an electric turbocharger nested bearing seat structure, comprising:
[0006] A motor end cover, wherein the motor end cover has a casting cavity; and
[0007] A bearing seat body, wherein the bearing seat body is confined in the casting cavity to complete the casting, and the motor end cover is fixed to the bearing seat body; the bearing seat body includes a reinforcement ring arranged on the outside; the reinforcement ring is arranged to be embedded in the casting cavity.
[0008] Compared with the prior art, the motor end cover of the utility model has a casting cavity for casting the outer contour of the bearing seat body. Compared with using an independent casting mold, part of the mold structure is omitted, thereby reducing the manufacturing cost; and after the casting is completed, the motor end cover and the bearing seat body are naturally fixed, and the reinforcement ring is configured to be embedded in the casting cavity, so that the connection between the two is more firm. On the basis of a stable connection, the assembly work of the two is omitted, thereby reducing the installation steps and reducing the assembly cost.
[0009] According to an embodiment of the utility model, the motor end cover is configured to be an aluminum alloy material, and the bearing seat body is configured to be a stainless steel material.
[0010] According to one embodiment of the utility model, the casting cavity includes a first cavity and a second cavity which are arranged in communication with each other; the bearing seat body includes a ring body; the reinforcement ring is arranged on the outer wall of the ring body; the ring body includes an inner ring body arranged on one side of the reinforcement ring; the first cavity is used to form the reinforcement ring during casting, and the second cavity is used to form the inner ring body during casting.
[0011] According to an embodiment of the present utility model, the first cavity is fixedly connected to the reinforcement ring, and the second cavity is fixedly connected to the inner ring body.
[0012] According to one embodiment of the utility model, it further includes an anti-drop component; the anti-drop component includes at least one anti-drop groove and at least one anti-drop buckle that can be embedded in the anti-drop groove; one of the anti-drop groove and the anti-drop buckle is arranged in the first cavity, and the other is arranged in the reinforcement ring.
[0013] According to an embodiment of the utility model, the anti-dropout groove is configured as an annular groove and is disposed on the outer side wall of the reinforcement ring; the anti-dropout buckle is configured as a circular ring and is disposed on the side wall of the first cavity.
[0014] According to an embodiment of the present invention, the bearing seat body further has a bearing fixing hole; the bearing seat body further includes a bearing limiting portion arranged on the inner side wall of the inner ring body.
[0015] According to an embodiment of the utility model, the motor end cover further includes an end cover outer edge and an end cover inner disc; the end cover inner disc includes a thickened portion arranged in the middle; and the casting cavity is arranged in the end cover thickened portion.
[0016] According to an embodiment of the utility model, the inner disk of the end cover has at least one casting positioning hole arranged on one end surface.
[0017] According to an embodiment of the utility model, the inner disk of the end cover has an output hole arranged in the middle; the output hole is arranged to communicate with the bearing fixing hole. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a three-dimensional schematic diagram of the utility model from a side perspective;
[0019] Figure 2 It is a three-dimensional schematic diagram of the utility model from another side perspective;
[0020] Figure 3 It is an explosion diagram of the utility model;
[0021] Figure 4 It is a cross-sectional schematic diagram of the utility model;
[0022] Figure 5 It is an enlarged schematic diagram of the local structure of the utility model. DETAILED DESCRIPTION
[0023] Before describing in detail any embodiment of the utility model, it should be understood that the utility model is not limited in its application to the construction and arrangement details of the components described below or illustrated in the following figures. The utility model can have other embodiments and can be practiced or carried out in various ways. In addition, it should be understood that the words and terms used here are for descriptive purposes and should not be considered restrictive. The use of "including" or "having" and its variations herein is intended to cover the items and their equivalents and additional items displayed below. Unless otherwise specified or limited, the terms "install", "connect", "support" and "couple" and their variations are widely used and cover direct installation and indirect installation, connection, support and connection. In addition, "connect" and "couple" are not limited to physical or mechanical connections or connections.
[0024] Furthermore, on the first aspect, in the disclosure of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore the above terms cannot be understood as limitations on the present invention; on the second aspect, the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" cannot be understood as a limitation on the quantity.
[0025] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.
[0026] The embodiments of the present utility model are further described below in conjunction with the accompanying drawings.
[0027] See also Figure 1-5 The electric turbocharger nested bearing seat structure shown in the figure includes: a motor end cover 1 and a bearing seat body 2. The motor end cover 1 has a casting cavity 11; the bearing seat body 2 is confined in the casting cavity 11 to complete the casting, and the motor end cover 1 and the bearing seat body 2 are fixed; the bearing seat body 2 includes a reinforcement ring 21 arranged on the outside; the reinforcement ring 21 is arranged to be embedded in the casting cavity 11.
[0028] In actual use, the motor end cover 1 of the utility model has a casting cavity 11 for casting the outer contour of the bearing seat body 2. Compared with using an independent casting mold, part of the mold structure is omitted, thereby reducing the manufacturing cost; and after the casting is completed, the motor end cover 1 and the bearing seat body 2 are naturally fixed, and the reinforcement ring 21 is configured to be embedded in the casting cavity 11, so that the connection between the two is more firm. On the basis of a stable connection, the assembly work of the two is omitted, thereby reducing the installation steps and reducing the assembly cost.
[0029] Please continue reading Figure 1-5 , wherein the motor end cover 1 is set to be an aluminum alloy material, and the bearing seat body 2 is set to be a stainless steel material.
[0030] By setting the motor end cover 1 and the bearing seat body 2 to be two different materials, the two have different casting temperatures, so that the bearing seat body 2 can be cast in the casting cavity 11 of the motor end cover 1; in addition, the motor end cover 1 also needs to play the role of protecting the motor and installing the volute, while the role of the bearing seat body 2 is to support the bearing. The two have different functions. Using different materials according to the actual functions can enable the motor end cover 1 and the bearing seat body 2 to play their respective roles.
[0031] Please continue reading Figure 3-5 , wherein the casting cavity 11 includes a first cavity 111 and a second cavity 112 which are arranged in communication with each other; the bearing seat body 2 includes a ring body 22; the reinforcement ring 21 is arranged on the outer wall of the ring body 22; the ring body 22 includes an inner ring body 221 which is arranged on one side of the reinforcement ring 21; the first cavity 111 is used to form the reinforcement ring 21 during casting, and the second cavity 112 is used to form the inner ring body 221 during casting.
[0032] By setting the first cavity 111 and the second cavity 112, the reinforcing ring 21 and the inner ring body 221 can be formed during casting of the bearing seat body 2. After casting, the reinforcing ring 21 and the inner ring body 221 are firmly nested in the first cavity 111 and the second cavity 112. Through these two cooperations, the motor end cover 1 and the bearing seat body 2 are fixedly connected, thereby eliminating the assembly step of the two.
[0033] Please continue reading Figure 5 , wherein the first cavity 111 is fixedly connected to the reinforcement ring 21 , and the second cavity 112 is fixedly connected to the inner ring body 221 .
[0034] Specifically, the inner wall of the first cavity 111 contacts and closely fits with the outer wall of the reinforcement ring 21 , and the inner wall of the second cavity 112 contacts and closely fits with the outer wall of the inner ring body 221 .
[0035] Please continue reading Figure 4 , Figure 5 , which further includes an anti-drop component 3; the anti-drop component 3 includes at least one anti-drop groove 31 and at least one anti-drop buckle 32 that can be embedded in the anti-drop groove 31; one of the anti-drop groove 31 and the anti-drop buckle 32 is set in the first cavity 111, and the other is set in the reinforcement ring 21.
[0036] During manufacturing, the anti-drop buckle 32 can be embedded in the anti-drop groove 31. A third drop is added on the basis of the two aforementioned drops, so that the bearing seat body 2 is more tightly connected to the motor end cover 1 after casting, and the bearing seat body 2 can be prevented from loosening during use.
[0037] Preferably, see Figure 5 , wherein the anti-dropout groove 31 is configured as an annular groove and is disposed on the outer side wall of the reinforcement ring 21 ; the anti-dropout buckle 32 is configured as a circular ring and is disposed on the side wall of the first cavity 111 .
[0038] Under this arrangement, the anti-drop buckle 32 can be fully embedded in the anti-drop groove 31 during casting, so the fastening effect is better and the molding is relatively simple.
[0039] In another embodiment, the anti-slip groove 31 can also be set to multiple groove segments, which are distributed circumferentially along the outer wall of the reinforcement ring 21, and the anti-slip buckle 32 can also be set to multiple buckle points, which are distributed circumferentially along the side wall of the first cavity 111 and the number and position correspond to the multiple groove segments.
[0040] Please continue reading Figure 3 , Figure 4, wherein the bearing seat body 2 further has a bearing fixing hole 23; the bearing seat body 2 further includes a bearing limiting portion 24 arranged on the inner side wall of the inner ring body 221.
[0041] When in use, the bearing fixing hole 23 is used to install the bearing so as to provide a reliable working environment for the bearing, and the bearing limiting portion 24 is used to support the bearing from one side so that the assembler can sense whether the bearing is installed in place.
[0042] Please continue reading Figure 3 , Figure 4 , wherein the motor end cover 1 further includes an end cover outer edge 12 and an end cover inner disk 13; the end cover inner disk 13 includes a thickened portion 131 arranged in the middle; and the casting cavity 11 is arranged in the end cover thickened portion 131.
[0043] By providing the thickened portion 131 , this position can accommodate the bearing seat body 2 having a certain thickness, and this position has better structural strength so as to withstand the high-speed rotation of the motor rotor and the turbine.
[0044] Please continue reading Figure 1 , wherein the inner disk body 13 of the end cover has at least one casting positioning hole 132 arranged on one end surface.
[0045] By setting the casting positioning hole 132 , the motor end cover 1 can be positioned so as to cast the bearing seat body 2 in the casting cavity 11 .
[0046] Please continue reading Figure 1 , Figure 2 , wherein the inner disk body 13 of the end cover has an output hole 133 arranged in the middle; the output hole 133 is arranged to communicate with the bearing fixing hole 23.
[0047] When in use, the output end of the motor rotor is movably connected to the bearing in the bearing fixing hole 23 and extends out from the output hole 133 so as to be connected to the turbine.
[0048] The above description is only for the best embodiment of the utility model, but it cannot be understood as a limitation of the claims. The utility model is not limited to the above embodiments, and its specific structure is allowed to be changed. All changes made within the protection scope of the independent claims of the utility model are within the protection scope of the utility model.
Claims
1. A nested bearing seat structure for an electric turbocharger, characterized in that: include: A motor end cover (1), wherein the motor end cover (1) has a casting cavity (11); as well as A bearing seat body (2), wherein the bearing seat body (2) is confined in the casting cavity (11) to complete the casting, and the motor end cover (1) is fixed to the bearing seat body (2); the bearing seat body (2) includes a reinforcement ring (21) arranged on the outside; the reinforcement ring (21) is arranged to be embedded in the casting cavity (11).
2. The electric turbocharger nested bearing seat structure according to claim 1, characterized in that: The motor end cover (1) is made of an aluminum alloy material, and the bearing seat body (2) is made of a stainless steel material.
3. The electric turbocharger nested bearing seat structure according to claim 1, characterized in that: The casting cavity (11) comprises a first cavity (111) and a second cavity (112) which are arranged in communication with each other; the bearing seat body (2) comprises a ring body (22); the reinforcement ring (21) is arranged on the outer wall of the ring body (22); the ring body (22) comprises an inner ring body (221) arranged on one side of the reinforcement ring (21); the first cavity (111) is used to form the reinforcement ring (21) during casting, and the second cavity (112) is used to form the inner ring body (221) during casting.
4. The electric turbocharger nested bearing seat structure according to claim 3, characterized in that: The first cavity (111) is fixedly connected to the reinforcement ring (21), and the second cavity (112) is fixedly connected to the inner ring body (221).
5. The electric turbocharger nested bearing seat structure according to claim 3, characterized in that: The invention further comprises an anti-slip component (3); the anti-slip component (3) comprises at least one anti-slip groove (31) and at least one anti-slip buckle (32) which can be embedded in the anti-slip groove (31); one of the anti-slip groove (31) and the anti-slip buckle (32) is arranged in the first cavity (111), and the other is arranged in the reinforcement ring (21).
6. The electric turbocharger nested bearing seat structure according to claim 5, characterized in that: The anti-drop groove (31) is configured as an annular groove and is disposed on the outer side wall of the reinforcement ring (21); the anti-drop buckle (32) is configured as a circular ring and is disposed on the side wall of the first cavity (111).
7. The electric turbocharger nested bearing seat structure according to claim 3, characterized in that: The bearing seat body (2) further has a bearing fixing hole (23); the bearing seat body (2) further includes a bearing limiting portion (24) arranged on the inner side wall of the inner ring body (221).
8. The electric turbocharger nested bearing seat structure according to claim 7, characterized in that: The motor end cover (1) further comprises an end cover outer edge (12) and an end cover inner disc (13); the end cover inner disc (13) comprises a thickened portion (131) arranged in the middle; and the casting cavity (11) is arranged in the end cover thickened portion (131).
9. The electric turbocharger nested bearing seat structure according to claim 8, characterized in that: The end cover inner disk body (13) has at least one casting positioning hole (132) arranged on one end surface thereof.
10. The electric turbocharger nested bearing seat structure according to claim 9, characterized in that: The end cover inner disk body (13) has an output hole (133) arranged in the middle; the output hole (133) is arranged to communicate with the bearing fixing hole (23).