Bearing steel sleeve structure

Abstract

The application discloses a bearing steel sleeve structure connected with a motor shell, which comprises a steel sleeve body, wherein a first groove and / or a second groove are arranged on the steel sleeve body, the first groove is arranged along at least part of the structure of the outer circumferential wall surface of the steel sleeve body, the first groove is recessed inward along the radial direction of the steel sleeve body, the second groove is arranged along at least part of the structure of the bottom end surface of the steel sleeve body, the second groove is recessed along the axial direction of the steel sleeve body, and a limiting piece is arranged in each of the first groove and the second groove. The technical scheme has the advantages that the weight is reduced, the material cost is lowered, the problems of rotation and falling off of the bearing steel sleeve structure in the use process are avoided, thermal failure is avoided, and the stability of connection and use is improved.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and in particular to a bearing steel sleeve structure. Background Technology

[0002] In water-cooled motors, steel bearing sleeves are often used in conjunction with the aluminum motor housing to ensure the wear resistance and strength of the bearing mounting end. However, traditional bearing sleeves are bulky and have low material utilization. Furthermore, because the coefficient of thermal expansion of aluminum alloy is much greater than that of steel, the expansion of the aluminum alloy housing during motor operation is greater than that of the steel sleeve, resulting in a gap between the steel sleeve and the housing mating surface. Under the alternating stress of high-speed bearing operation, the steel sleeve is prone to slight circumferential rotation or axial displacement within the housing, leading to abnormal bearing wear, heat generation, and compromised operational stability. Utility Model Content

[0003] This application provides a bearing steel sleeve structure that helps reduce weight, lower material costs, avoids problems such as rotation or detachment of the bearing steel sleeve structure during use, prevents thermal failure, and improves the stability of connection and use.

[0004] This application provides a bearing steel sleeve structure for connection with a motor housing. The bearing steel sleeve structure includes a steel sleeve body, on which a first groove and / or a second groove are provided. The first groove is provided along at least a portion of the outer peripheral wall of the steel sleeve body and is recessed radially inward along the steel sleeve body. The second groove is provided along at least a portion of the bottom end face of the steel sleeve body and is recessed axially along the steel sleeve body. Limiting members are respectively provided in the first groove and the second groove.

[0005] The technical solution of this application provides a first groove and / or a second groove on the steel sleeve body. The first groove is arranged along at least a portion of the outer peripheral wall of the steel sleeve body, and the second groove is arranged along at least a portion of the bottom end face of the steel sleeve body. Since both the first and second grooves are hollowed-out structures, it is beneficial to reduce the weight of the steel sleeve body, thereby reducing material costs. By providing limiting members in the first and second grooves, the limiting members can cooperate with the motor housing to restrict the rotation of the steel sleeve body. The first groove is recessed radially inward along the steel sleeve body, which is beneficial to restrict the circumferential rotation of the steel sleeve body relative to the motor housing. The second groove is recessed axially along the steel sleeve body, which is beneficial to restrict the axial movement of the steel sleeve body. This is beneficial to improving the stability of connection and use. The limiting members can cooperate with the motor housing to avoid the problem of relative rotation or detachment of the bearing steel sleeve structure during use, and to avoid thermal failure.

[0006] According to the foregoing embodiments of this application, both the first groove and the second groove are annular continuous grooves; or, both the first groove and the second groove are composed of multiple unconnected groove segments; or, one of the first groove or the second groove is composed of multiple unconnected groove segments, and the other is annular continuous groove. In the above embodiments, by setting the first groove and the second groove as annular continuous grooves, or by setting both the first groove and the second groove as multiple unconnected groove segments, or by setting one of the first groove and the second groove as multiple unconnected groove segments, and the other as annular continuous groove, since the first groove and the second groove have a hollowed-out structure, it is beneficial to reduce the weight of the steel sleeve body, realize the lightweighting of the steel sleeve body, and reduce material costs and the overall weight of the product.

[0007] According to the aforementioned embodiments of this application, the limiting member in the first groove includes a plurality of first protrusions, and the limiting member in the second groove includes a plurality of second protrusions. The plurality of first protrusions and second protrusions are respectively arranged sequentially along the circumference of the steel sleeve body in the first groove and the second groove.

[0008] According to the foregoing embodiments of this application, the cross-section of the first protrusion and / or the second protrusion is rectangular, trapezoidal, or triangular.

[0009] According to the aforementioned embodiments of this application, the first protrusion and the second protrusion are misaligned, and the projection positions of the first protrusion and the second protrusion on the axial direction of the steel sleeve body do not coincide.

[0010] According to the foregoing embodiments of this application, the steel sleeve body includes a first part and a second part connected to each other, and the first part and the second part are arranged sequentially along the axial direction of the steel sleeve body. A first groove is located on the outer peripheral wall surface of the first part, and the recessed direction of the first groove is the direction of the axis of the steel sleeve body. A first protrusion is evenly distributed in the first groove. A second groove is located on the bottom end face of the second part, and the recessed direction of the second groove is the axial direction of the steel sleeve body. A second protrusion is evenly distributed in the second groove.

[0011] According to the aforementioned embodiments of this application, the extension direction of the first protrusion is different from the direction of the axis of the steel sleeve body, and the extension direction of the second protrusion is the same as the axial direction of the steel sleeve body.

[0012] According to the foregoing embodiments of this application, a plurality of first grooves are sequentially and spaced apart on the outer peripheral wall surface of the first part.

[0013] According to the aforementioned embodiments of this application, the second part near the axis of the steel sleeve body includes a third part and a fourth part. The third part and the fourth part are coaxially connected sequentially along the axial direction of the steel sleeve body. The diameter of the third part is larger than that of the fourth part, resulting in a stepped locking structure between the third part and the fourth part. The motor housing has a locking groove that mates with the locking structure. In the above embodiments, by setting the third part and the fourth part on the side of the second part near the axis of the steel sleeve body, and by having the third part have a larger diameter than the fourth part, a stepped locking structure is formed between the third part and the fourth part. The stepped locking structure and the locking groove engage with each other, which facilitates axial constraint, further improving the stability and reliability of the connection between the bearing steel sleeve structure and the motor housing, preventing relative rotation or detachment of the bearing steel sleeve structure during use, and avoiding thermal failure.

[0014] According to any of the foregoing embodiments of this application, the bearing sleeve structure further includes a clamping member and a connecting member. The clamping member is disposed above the sleeve body, and the connecting member connects the sleeve body and the clamping member. In the above embodiments, by providing the clamping member and the connecting member, the bearing sleeve structure is further reinforced axially, which helps to improve the stability and reliability of the connection between the bearing sleeve structure and the motor housing, prevents the bearing sleeve structure from falling off under extreme conditions such as high speed and high vibration, facilitates installation, maintenance and replacement, and extends service life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the bearing sleeve structure of this application from a first angle. Figure 2 This is a structural schematic diagram from a second angle of an embodiment of the bearing sleeve structure of this application; Figure 3 This is a cross-sectional structural schematic diagram of an embodiment of the bearing steel sleeve structure of this application; Figure 4 This is a cross-sectional schematic diagram of an embodiment of the bearing steel sleeve structure of this application and its fit with the motor housing; Figure 5 This is a schematic diagram of another embodiment of the bearing sleeve structure of this application; Figure 6 This is a schematic diagram of another embodiment of the bearing sleeve structure of this application.

[0016] Explanation of icon numbers: Bearing steel sleeve structure -100, motor housing -200; Steel sleeve body - 110, first groove - 120, second groove - 130, clamping part - 140, connecting part - 150, locking groove - 210; Part 1-111, Part 2-112, Part 3-113, Part 4-114, Positioning Structure-115, First Protrusion-121, Second Protrusion-131; Radial of the steel sleeve body - S1, axial of the steel sleeve body - S2. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0018] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0019] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0020] This application provides a bearing steel sleeve structure that helps reduce weight, lower material costs, avoids problems such as rotation or detachment of the bearing steel sleeve structure during use, prevents thermal failure, and improves the stability of connection and use.

[0021] like Figures 1 to 2 As shown, this application provides a bearing steel sleeve structure connected to a motor housing 200. The bearing steel sleeve structure 100 includes a steel sleeve body 110. In some embodiments, the steel sleeve body 110 is provided with a first groove 120, or a second groove 130, or a combination of the first groove 120 and the second groove 130. This application does not limit the specific arrangement of the first groove 120 and the second groove 130.

[0022] like Figures 1 to 2As shown, the steel sleeve body 110 includes a first part 111 and a second part 112 connected to each other. The first part 111 and the second part 112 are arranged sequentially along the axial direction of the steel sleeve body 110. A first groove 120 is located on the outer peripheral wall of the first part 111. The first groove 120 is recessed inward along the radial direction S1 of the steel sleeve body 110, and the recessed direction of the first groove 120 is the direction of the axis of the steel sleeve body. A second groove 130 is located on the bottom end face of the second part 112. The second groove 130 is recessed along the axial direction S2 of the steel sleeve body 110. Limiting members are respectively provided in the first groove 120 and the second groove 130.

[0023] The technical solution of this application provides a first groove 120, or a second groove 130, or a combination of the first groove 120 and the second groove 130 on the steel sleeve body 110. The first groove 120 is provided along the outer peripheral wall of the steel sleeve body 110, and the second groove 130 is provided along the bottom end face of the steel sleeve body 110. Since the first groove 120 and the second groove 130 are hollow structures, it is beneficial to reduce the weight of the steel sleeve body 110, thereby reducing material costs.

[0024] By providing limiting members in the first groove 120 and the second groove 130, the limiting members can cooperate with the motor housing 200 to restrict the rotation of the steel sleeve body 110. The first groove 120 is recessed inward along the radial direction S1 of the steel sleeve body 110, which helps to restrict the circumferential rotation of the steel sleeve body 110 relative to the motor housing 200. The second groove 130 is recessed along the axial direction S2 of the steel sleeve body 110, which helps to restrict the axial movement of the steel sleeve body 110 in the axial direction S2. This helps to improve the stability of connection and use. The limiting members can cooperate with the motor housing 200 to avoid the problem of relative rotation or detachment of the bearing steel sleeve structure 100 during use, and avoid thermal failure.

[0025] In some embodiments, a plurality of first grooves 120 may be sequentially and spaced apart on the outer peripheral wall of the first part 111, which can further increase the anti-rotation capability and reduce the weight of the material.

[0026] In some embodiments, a continuous annular first groove 120 may be hollowed out on the outer peripheral surface of the first part 111, and a continuous annular second groove 130 may be hollowed out circumferentially at the bottom of the second part 112.

[0027] In other embodiments, multiple unconnected groove segments may be hollowed out on the outer peripheral surface of the first portion 111 to form a first groove 120, and multiple unconnected groove segments may be hollowed out circumferentially at the bottom of the second portion 112 to form a second groove 130.

[0028] In some other embodiments, one of the first groove 120 and the second groove 130 may be configured as a continuous annular groove, and the other may be configured as a continuous annular groove.

[0029] In the above embodiments, by setting the first groove 120 and the second groove 130 as annular continuous grooves, or by setting both the first groove 120 and the second groove 130 as multiple unconnected groove segments, or by setting one of the first groove 120 and the second groove 130 as multiple unconnected groove segments and the other as annular continuous grooves, since the first groove 120 and the second groove 130 are hollow structures, it is beneficial to reduce the weight of the steel sleeve body 110, realize the lightweighting of the steel sleeve body 110, and reduce material costs and the overall weight of the product.

[0030] like Figure 1 As shown, the limiting member in the first groove 120 includes a plurality of first protrusions 121, and the limiting member in the second groove 130 includes a plurality of second protrusions 131. The plurality of first protrusions 121 and second protrusions 131 are arranged sequentially along the circumference of the steel sleeve body 110 in the first groove 120 and the second groove 130, respectively.

[0031] In some embodiments, the first protrusions 121 are evenly distributed within the first grooves 120. For example... Figure 1 As shown, since the first groove 120 is circumferentially arranged on the outer wall of the first part 111, and the recessed direction of the first groove 120 is the direction of the axis of the steel sleeve body 110, the extension direction of the first protrusion 121 is different from the direction of the axis of the steel sleeve body 110. The first protrusion 121 extends circumferentially in the first groove 120, increasing the size of the first protrusion 121 to improve the anti-rotation capability.

[0032] In some embodiments, the second protrusions 131 are evenly distributed within the second grooves 130. For example... Figure 1 As shown, since the second groove 130 is located at the bottom of the steel sleeve body 110 and the recessed direction of the second groove 130 is the axial direction S2 of the steel sleeve body 110, the extension direction of the second protrusion 131 is the same as the axial direction S2 of the steel sleeve body 110. The multiple second protrusions 131 are engaged with the motor housing 200, which helps to further improve the anti-fall-off capability on the axial direction S2 of the steel sleeve body 110.

[0033] When the bearing sleeve structure 100 and the motor housing 200 are cast or assembled, the first protrusion 121 or the second protrusion 131 can be embedded or fitted into the corresponding slot or recess on the motor housing 200. Since the recessed direction of the first groove 120 extends along the radial direction S1 of the sleeve body 110 and is directed toward the axis of the sleeve body 110, the first protrusion 121 can achieve circumferential anti-rotation and withstand a certain circumferential torque.

[0034] Since the recessed direction of the second groove 130 extends along the axial direction S2 of the steel sleeve body 110, it enhances the restraining effect of the bearing steel sleeve structure 100 relative to the motor housing 200 in the axial direction S2, preventing it from coming off due to vibration, hydraulic pressure or thermal expansion and contraction during assembly or operation, thereby improving reliability.

[0035] By providing a first protrusion 121 and a second protrusion 131 in the first groove 120 and the second groove 130 respectively, the material weight of the bearing steel sleeve structure 100 is reduced while avoiding increased manufacturing complexity. This provides stable circumferential positioning and anti-rotation capability, as well as anti-detachment capability in the axial direction S2, thereby preventing the steel sleeve body 110 from rotating and falling off relative to the motor housing 200 during operation, protecting the bearing and mating surface, and preventing thermal failure.

[0036] In some embodiments, the first groove 120 and the first protrusion 121, the second groove 130 and the second protrusion 131 can all be cast in one piece without the need for subsequent complex machining, which simplifies the production process and significantly reduces manufacturing costs.

[0037] In some implementations, such as Figure 1 , Figure 5 as well as Figure 6 As shown, the first protrusion 121 and the second protrusion 131 can be configured with the same or different cross-sectional shapes according to the actual needs of stress distribution. For example, the cross-sections of the first protrusion 121 and the second protrusion 131 can both be configured as rectangles, trapezoids, or triangles. Alternatively, the cross-section of the first protrusion 121 can be configured as a trapezoid, and the cross-section of the second protrusion 131 can be configured as a triangle, etc. This application does not limit the shape of the first protrusion 121 and the second protrusion 131.

[0038] like Figure 1As shown, to further improve torque resistance and anti-detachment capability, the steel sleeve body 110 simultaneously provides a first groove 120 on the outer peripheral wall of the first part 111 and a second groove 130 on the bottom circumferential direction of the second part 112. The first protrusion 121 and the second protrusion 131 are staggered, that is, the projection positions of the first protrusion 121 and the second protrusion 131 on the axial direction S2 of the steel sleeve body 110 do not coincide, so that the motor housing 200 can engage with at least one protrusion at any cross-sectional position, dispersing local stress and improving the uniformity of torque resistance. The staggered arrangement of the first protrusion 121 and the second protrusion 131 makes the force transmission more uniform and reduces single-point stress concentration. During the casting process, it is easier to form the motor housing 200 to cover the first protrusion 121 and the second protrusion 131, increasing the meshing strength between the bearing steel sleeve structure 100 and the motor housing 200, thereby further improving the anti-rotation and anti-detachment capability.

[0039] like Figures 2 to 4 As shown, the second part 112 near the axis of the steel sleeve body 110 includes a third part 113 and a fourth part 114. The third part 113 and the fourth part 114 are coaxially connected in sequence along the axial direction S2. The diameter of the third part 113 is larger than that of the fourth part 114, so that there is a stepped locking structure 114 between the third part 113 and the fourth part 114. The motor housing 200 has a locking groove 210 that is connected to the locking structure 114. In the above embodiment, by providing a third part 113 and a fourth part 114 on the side of the second part 112 near the axis of the steel sleeve body 110, with the diameter of the third part 113 being larger than that of the fourth part 114, a stepped locking structure 114 is formed between the third part 113 and the fourth part 114. The stepped locking structure 114 engages with the locking groove 210, which facilitates constraint on the axial direction S2 of the steel sleeve body 110, further improving the stability and reliability of the connection between the bearing steel sleeve structure 100 and the motor housing 200, preventing relative rotation or detachment of the bearing steel sleeve structure 100 during use, and avoiding thermal failure. Under heat or coolant pressure, the locking structure 114 provides more stable positioning performance. The third part 113, the fourth part 114, and the second part 112 can be integrally cast, reducing the complexity of the processing steps, thereby facilitating mass production and assembly.

[0040] like Figure 4As shown, the bearing sleeve structure 100 also includes a clamping member 140 and a connecting member 150. The clamping member 140 is disposed above the sleeve body 110, and the connecting member 150 is connected between the sleeve body 110 and the clamping member 140. The connecting member 150 can be a screw. When the connecting member 150 is tightened, the clamping member 140 presses downward against the top surface of the sleeve body 110, thereby providing a clamping force in the axial direction S2 of the sleeve body 110. In the above embodiment, by providing the clamping member 140 and the connecting member 150, the bearing sleeve structure 100 is further reinforced in the axial direction S2 of the sleeve body 110. This helps to improve the stability and reliability of the connection between the bearing sleeve structure 100 and the motor housing 200, prevents the bearing sleeve structure 100 from falling off under extreme conditions such as high speed and high vibration, facilitates installation, maintenance and replacement, and enhances service life.

[0041] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A bearing steel sleeve structure connected with a motor housing, characterized in that, The bearing sleeve structure includes a sleeve body, on which a first groove and / or a second groove are provided. The first groove is provided along at least a portion of the structure of the outer peripheral wall of the steel sleeve body, and the first groove is recessed radially inward along the steel sleeve body; The second groove is provided along at least a portion of the structure of the bottom end face of the steel sleeve body, and the second groove is recessed along the axial direction of the steel sleeve body; Limiting elements are respectively provided in the first groove and the second groove.

2. The bearing steel bushing structure of claim 1, wherein, Both the first groove and the second groove are continuous annular grooves; or, Both the first groove and the second groove are composed of multiple unconnected groove segments; or, One of the first groove or the second groove is composed of multiple unconnected groove segments, and the other is a continuous annular groove.

3. The bearing steel bushing structure of claim 1, wherein, The limiting member in the first groove includes a plurality of first protrusions, and the limiting member in the second groove includes a plurality of second protrusions. The plurality of first protrusions and second protrusions are respectively arranged in the first groove and the second groove along the circumference of the steel sleeve body.

4. The bearing steel bushing structure of claim 3, wherein The cross-section of the first protrusion and / or the second protrusion is rectangular, trapezoidal, or triangular.

5. The bearing steel bushing structure of claim 3, wherein The first protrusion and the second protrusion are misaligned, and their projection positions on the axial direction of the steel sleeve body do not coincide.

6. The bearing steel bushing structure of claim 3, wherein The steel sleeve body includes a first part and a second part that are connected to each other, and the first part and the second part are arranged sequentially along the axial direction of the steel sleeve body. The first groove is located on the outer peripheral wall of the first part, the recess direction of the first groove is the direction of the axis of the steel sleeve body, and the first protrusion is evenly distributed in the first groove. The second groove is located on the bottom end face of the second part, and the recessed direction of the second groove is the axial direction of the steel sleeve body. The second protrusion is evenly distributed in the second groove.

7. The bearing steel bushing structure of claim 6, wherein The extension direction of the first protrusion is different from the direction of the axis of the steel sleeve body. The second protrusion extends in the same direction as the axial direction of the steel sleeve body.

8. The bearing steel bushing structure of claim 6, wherein, The outer peripheral wall of the first part is provided with a plurality of the first grooves at intervals.

9. The bearing steel bushing structure of claim 6, wherein, The second part includes a third part and a fourth part on the side near the axis of the steel sleeve body. The third part and the fourth part are coaxially connected in sequence along the axial direction of the steel sleeve body. The diameter of the third part is larger than that of the fourth part, so that there is a stepped locking structure between the third part and the fourth part. The motor housing has a locking groove that cooperates with the locking structure.

10. The bearing steel bushing structure of any one of claims 1 to 9, wherein, The bearing sleeve structure also includes: A clamping element is disposed above the steel sleeve body; and A connector is used to connect the steel sleeve body and the clamping member.

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