End cap assembly and electric machine having the same
By designing the bearing mounting groove and shaft hole structure of the end cover assembly, and combining it with the use of annular plates and fasteners, the problem of wasted axial space in the motor was solved, thereby improving the compactness and reliability of the motor.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU YUANENG MECHANICAL & ELECTRICAL TECH CO LTD
- Filing Date
- 2025-07-18
- Publication Date
- 2026-05-29
AI Technical Summary
In existing motors, the protruding pressure plate and screw heads result in wasted axial space, affecting the motor's compactness and reliability.
Design an end cap assembly including a bearing mounting groove and a shaft hole, using a bearing pressure plate and fasteners, wherein the fasteners do not extend beyond the surface of the bearing pressure plate in the thickness direction of the end cap, and combine an annular plate structure to optimize the compactness and stability of the end cap assembly.
It effectively reduces the size of the motor, improves the reliability and compactness of the motor, optimizes the installation space of the bearing pressure plate, and enhances the overall rigidity and stability.
Smart Images
Figure CN224305574U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor technology, and in particular to an end cap assembly and a motor having the same. Background Technology
[0002] Currently, the vast majority of motors require screws for installation. A motor consists of a shaft, rotor assembly, stator core, coil windings, housing, end covers, pressure plates, and screws. The screws pass through the end covers and pressure plates in sequence, securing the end covers and pressure plates together.
[0003] Since the pressure plate and screw are conductors, a certain gap must be maintained between the pressure plate and screw head and the end winding for electrical safety requirements. In the prior art, the pressure plate and the top surface of the bearing housing are flat, and the screw head protrudes from the pressure plate. The safety gap is designed based on the highest surface, resulting in some wasted axial space and affecting the reliability of the motor. Utility Model Content
[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an end cap assembly that not only effectively improves the compactness of the end cap assembly and reduces the size of the motor, but also effectively improves the reliability of the motor.
[0005] This utility model also proposes a motor having the above-mentioned end cap assembly.
[0006] According to a first aspect of the present invention, an end cap assembly includes: an end cap having a bearing mounting groove and a shaft hole, the bearing mounting groove being formed by a recess in one side surface of the end cap, the shaft hole penetrating the bottom wall of the bearing mounting groove along the thickness direction of the end cap, a fixing part being provided on the periphery of the bearing mounting groove, a bearing pressure plate being arranged on one side of the end cap and sealing a portion of the opening of the bearing mounting groove, the bearing pressure plate having a plurality of spaced first through holes, and a plurality of fasteners, the fasteners passing through the corresponding first through holes and being fastened to the fixing part, and in the thickness direction of the end cap, the end face of the fastener facing away from the fixing part does not extend beyond the side surface of the bearing pressure plate facing away from the end cap.
[0007] According to the end cover assembly of this utility model, by setting an end cover, a bearing pressure plate and multiple fasteners in the end cover assembly, the end cover forms a bearing mounting groove and a shaft hole. The bearing mounting groove is formed by a recess on one side surface of the end cover. The shaft hole penetrates the bottom wall of the bearing mounting groove along the thickness direction of the end cover. A fixing part is provided on the periphery of the bearing mounting groove. The bearing pressure plate is arranged on one side of the end cover and seals part of the opening of the bearing mounting groove. The bearing pressure plate has multiple first through holes arranged at intervals. The fasteners pass through the corresponding first through holes and are fastened to the fixing part. In the thickness direction of the end cover, the end face of the fastener facing away from the fixing part does not exceed the side surface of the bearing pressure plate facing away from the end cover. This not only effectively improves the compactness of the end cover assembly and reduces the size of the motor, but also effectively improves the reliability of the motor.
[0008] In some embodiments, the end cap includes: an end plate, the shaft hole extending through the end plate along its thickness direction; a first annular plate connected to one side of the end plate in its thickness direction and extending circumferentially along the shaft hole in an annular shape, the first annular plate cooperating with the end plate to define the bearing mounting groove, the height of the first annular plate being configured to be less than the height of the outer ring of the bearing disposed in the bearing mounting groove along the thickness direction of the end plate, and the fixing part being a boss connected to one side surface of the end plate, and the fixing part being arranged radially outward of the first annular plate.
[0009] In some embodiments, the fixing part is connected to the outer peripheral surface of the first ring plate and extends radially outward along the first ring plate. In the thickness direction of the end plate, the height of the fixing part protruding from one side surface of the end plate is lower than the height of the first ring plate protruding from one side surface of the end plate.
[0010] In some embodiments, the fixing part extends in a ring shape along the circumference of the first ring plate; or, there are multiple fixing parts, which are arranged at intervals along the circumference of the first ring plate and correspond one-to-one with multiple first through holes.
[0011] In some embodiments, the end cap further includes a second annular plate, which is arranged radially outward of the first annular plate and extends circumferentially along the first annular plate in an annular shape, and the fixing portion is connected between the first annular plate and the second annular plate.
[0012] In some embodiments, the bearing pressure plate further includes: a first plate portion and a second plate portion connected together, the first plate portion being arranged on the outer side of the second plate portion in the radial direction of the shaft hole and located on the side of the second plate portion facing the bottom wall of the bearing mounting groove in the thickness direction of the end cap, wherein the first through hole penetrates the first plate portion in the thickness direction of the end cap, one end of the second plate portion is connected to the first plate portion, and the other end extends radially along the shaft hole to the inner side of the bearing mounting groove.
[0013] In some embodiments, the first plate portion and the second plate portion are both flat plates arranged perpendicular to the thickness direction of the end cap. The bearing pressure plate further includes a connecting plate portion, which extends along the thickness direction of the end cap. One end of the connecting plate portion is connected to the inner end of the first plate portion in the radial direction of the shaft hole, and the other end is connected to the outer end of the second plate portion in the radial direction of the shaft hole. In the direction from the end cap toward the bearing pressure plate, the connecting plate portion extends obliquely toward the center direction of the shaft hole.
[0014] In some embodiments, the bearing pressure plate extends in a ring shape along the circumference of the shaft hole, or there are multiple bearing pressure plates, which are arranged at intervals along the circumference of the shaft hole.
[0015] In some embodiments, the bearing plate is a steel plate, and / or the thickness of the bearing plate is greater than or equal to 2 mm and less than or equal to 6 mm.
[0016] According to a second aspect of the present invention, a motor includes: a housing defining a mounting cavity open on one side; an end cap assembly according to a first aspect of the present invention, the end cap assembly covering the open side of the mounting cavity; a bearing disposed in a bearing mounting groove, the outer ring of the bearing being sandwiched between the bottom wall of the bearing mounting groove and the bearing pressure plate along the thickness direction of the end cap; and a motor shaft, one end of the motor shaft being located in the mounting cavity, and the other end of the motor shaft extending out of the housing through the inner ring of the bearing and the shaft hole.
[0017] According to the second aspect of the present invention, by providing the end cover assembly of the first aspect, the compactness of the motor can be effectively improved, the size of the motor can be reduced, and the reliability of the motor can also be effectively improved.
[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0019] Figure 1 This is a cross-sectional view of a motor according to an embodiment of the present utility model;
[0020] Figure 2 This is a schematic diagram of the end cap according to an embodiment of the present utility model;
[0021] Figure 3 This is a schematic diagram of a bearing pressure plate according to some embodiments of the present utility model;
[0022] Figure 4 This is a schematic diagram of a bearing pressure plate according to other embodiments of the present invention.
[0023] Figure label:
[0024] 100. Electric motor;
[0025] 10. End cap assembly;
[0026] 11. End cap; 111. Bearing mounting groove; 112. Shaft hole; 113. End plate; 114. First ring plate; 115. Boss; 116. Second ring plate;
[0027] 12. Bearing pressure plate; 121. First plate section; 1211. First through hole; 122. Second plate section; 123. Connecting plate section;
[0028] 13. Fasteners;
[0029] 14. Housing; 141. Mounting cavity;
[0030] 15. Bearings;
[0031] 16. Motor shaft;
[0032] 17. Windings. Detailed Implementation
[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0034] The following is for reference. Figures 1-4 The end cap assembly 10 according to a first aspect embodiment of the present invention is described.
[0035] like Figures 1-4 As shown, the end cap assembly 10 according to the first aspect of the present invention includes: an end cap 11, a bearing pressure plate 12, and a plurality of fasteners 13.
[0036] The end cap 11 has a bearing mounting groove 111 and a shaft hole 112. The bearing mounting groove 111 is formed by a recess on one side surface of the end cap 11. The shaft hole 112 passes through the bottom wall of the bearing mounting groove 111 along the thickness direction of the end cap 11. A fixing part is provided on the periphery of the bearing mounting groove 111. The bearing pressure plate 12 is arranged on one side of the end cap 11 and seals a part of the opening of the bearing mounting groove 111. The bearing pressure plate 12 has a plurality of first through holes 1211 arranged at intervals. The fastener 13 passes through the corresponding first through hole 1211 and is fastened to the fixing part. In the thickness direction of the end cap 11, the end face of the fastener 13 facing away from the fixing part does not exceed the side surface of the bearing pressure plate 12 facing away from the end cap 11.
[0037] In some specific examples, such as Figure 1 As shown, the right side of the end cover 11 is recessed to the left to form a bearing mounting groove 111. The bearing mounting groove 111 opens to the right, and the shaft hole 112 penetrates the bottom wall of the mounting groove in the left-right direction. The bearing pressure plate 12 is arranged on the right side of the end cover 11 and seals part of the opening of the bearing mounting groove 111. The bearing 15 is disposed in the bearing mounting groove 111. That is to say, the bearing pressure plate 12 and the bottom wall of the bearing mounting groove 111 can cooperate with each other to restrict the bearing 15 from moving within the bearing mounting groove 111.
[0038] Furthermore, such as Figure 1 As shown, the bearing pressure plate 12 is provided with a plurality of first through holes 1211 arranged at intervals. The fastener 13 is a screw, which includes a screw head and a screw post. The fixing part is provided with a screw hole, and the screw post passes through the screw hole and the first through hole 1211. The bearing pressure plate 12 is pressed tightly on the fixing part by the screw head, thereby fixing the bearing pressure plate 12 on the end cover 11.
[0039] In some specific examples, for example Figure 1 As shown, the motor 100 includes a winding 17, which is located on the right side of the end cover assembly 10. In the thickness direction of the end cover 11, the end face of the fastener 13 facing away from the fixing part does not extend beyond the side surface of the bearing pressure plate 12 facing away from the end cover 11. That is, in the left-right direction, the right side of the nail head is located to the left of the right side of the bearing pressure plate 12. Thus, the distance between the right side of the nail head and the winding 17 is greater than or equal to the distance between the right side of the bearing pressure plate 12 and the winding 17.
[0040] In this embodiment, the distance between the right side of the nail head and the winding 17 is greater than or equal to the distance between the right side of the bearing pressure plate 12 and the winding 17. Compared to the prior art where the nail head protrudes to the right from the right side of the pressure plate, this solution can effectively improve the compactness of the end cover assembly 10 while ensuring electrical safety clearance, thereby effectively shortening the length of the motor 100 in the left-right direction. Furthermore, it can also effectively shorten the length of the motor 100 shaft, thereby improving the stress state of the motor 100 shaft and the bearing 15.
[0041] According to the embodiment of the present invention, the end cap assembly 10 includes an end cap 11, a bearing pressure plate 12, and a plurality of fasteners 13. The end cap 11 has a bearing mounting groove 111 and a shaft hole 112. The bearing mounting groove 111 is formed by a recess on one side surface of the end cap 11. The shaft hole 112 penetrates the bottom wall of the bearing mounting groove 111 along the thickness direction of the end cap 11. A fixing part is provided on the periphery of the bearing mounting groove 111. The bearing pressure plate 12 is arranged on one side of the end cap 11 and seals the bearing. A portion of the mounting groove 111 has an opening, and the bearing pressure plate 12 is provided with a plurality of first through holes 1211 arranged at intervals. The fastener 13 passes through the corresponding first through hole 1211 and is fastened to the fixing part. In the thickness direction of the end cover 11, the end face of the fastener 13 facing away from the fixing part does not exceed the side surface of the bearing pressure plate 12 facing away from the end cover 11. This not only effectively improves the compactness of the end cover assembly 10 and reduces the volume of the motor 100, but also effectively improves the reliability of the motor 100.
[0042] In one embodiment of this utility model, such as Figure 2 As shown, the end cap 11 includes: an end plate 113, a shaft hole 112 extending through the end plate 113 along its thickness direction; a first ring plate 114, which is connected to one side of the end plate 113 in the thickness direction and extends circumferentially along the shaft hole 112 to form a ring. The first ring plate 114 cooperates with the end plate 113 to define a bearing mounting groove 111. Along the thickness direction of the end plate 113, the height of the first ring plate 114 is configured to be less than the height of the outer ring of the bearing 15 provided in the bearing mounting groove 111. The fixing part is a boss 115 connected to one side surface of the end plate 113, and the fixing part is arranged radially outside the first ring plate 114.
[0043] In some specific examples, such as Figure 2 As shown, the shaft hole 112 extends through the end plate 113 in the left-right direction. The first ring plate 114 is connected to the right side of the end plate 113 and extends in a ring structure along the circumference of the shaft hole 112. The first ring plate 114 and the end plate 113 cooperate to form the bearing mounting groove 111. That is, the inner circumferential surface of the first ring plate 114 constitutes the side wall of the bearing mounting groove 111, and the right side surface of the end plate 113 constitutes the bottom wall of the bearing mounting groove 111. Further, along the thickness direction of the end plate 113, the height of the bearing mounting groove 111 is less than the height of the outer ring of the bearing 15 in the bearing mounting groove 111. A boss 115 protruding to the right is formed on the right side surface of the end plate 113. The boss 115 is arranged on the outer side of the first ring plate 114 in the radial direction of the shaft hole 112, and the screw hole is provided on the boss 115.
[0044] In this embodiment, by providing an end plate 113 and a first annular plate 114 in the end cover 11, the shaft hole 112 penetrates the end plate 113 along the thickness direction, the first annular plate 114 is connected to one side of the end plate 113 in the thickness direction and extends in a ring shape along the circumference of the shaft hole 112, the first annular plate 114 and the end plate 113 cooperate to define the bearing mounting groove 111, and the height of the first annular plate 114 along the thickness direction of the end plate 113 is configured to be less than the height of the outer ring of the bearing 15 provided in the bearing mounting groove 111, the fixing part is a boss 115 connected to one side surface of the end plate 113, and the fixing part is arranged on the radially outer side of the first annular plate 114, which can effectively optimize the structural structure of the end cover 11, thereby effectively saving the installation space of the end cover 11.
[0045] In one embodiment of this utility model, such as Figure 1 and Figure 2 As shown, the fixing part is connected to the outer peripheral surface of the first ring plate 114 and extends outward along the radial direction of the first ring plate 114. In the thickness direction of the end plate 113, the height of the fixing part protruding from one side surface of the end plate 113 is lower than the height of the first ring plate 114 protruding from one side surface of the end plate 113.
[0046] In some specific examples, such as Figure 2 As shown, the boss 115 extends radially along the first annular plate 114, and one end of the boss 115 is connected to the outer peripheral surface of the first annular plate 114. Further, as... Figure 1 As shown, in the left-right direction, the right side of the boss 115 is located to the left of the right side of the first ring plate 114. Thus, when the fastener 13 fixes the bearing pressure plate 12 on the boss 115, there is sufficient distance between the fastener 13 and the winding 17 of the motor 100 to meet the requirements of electrical safety distance.
[0047] In this embodiment, by connecting the fixing part to the outer peripheral surface of the first ring plate 114 and extending it radially outward along the first ring plate 114, the height of the fixing part protruding from one side surface of the end plate 113 in the thickness direction of the end plate 113 is lower than the height of the first ring plate 114 protruding from one side surface of the end plate 113. This not only effectively improves the overall rigidity of the end cover assembly 10, but also avoids the bearing pressure plate 12 occupying additional space in the axial direction, thereby effectively saving the installation space of the bearing pressure plate 12.
[0048] In one embodiment of this utility model, such as Figure 2 As shown, the fixing part extends in a ring shape along the circumference of the first ring plate 114; or, there are multiple fixing parts, which are arranged at intervals along the circumference of the first ring plate 114 and correspond one-to-one with multiple first through holes 1211.
[0049] For example, the fixing part extends in a ring shape along the circumference of the first ring plate 114; or, for example, there are multiple fixing parts, which are arranged at intervals along the circumference of the first ring plate 114 and correspond one-to-one with multiple first through holes 1211. For example, the number of fixing parts can be three, four, five, six, or more than seven. In some specific examples, such as... Figure 2 As shown, there are six fixing parts, which are arranged at intervals along the circumference of the first ring plate 114 and correspond one-to-one with the multiple first through holes 1211.
[0050] In this embodiment, by extending the fixing part into a ring shape along the circumference of the first ring plate 114, the contact area between the fixing part and the bearing pressure plate 12 can be effectively increased, thereby effectively increasing the stability of the bearing pressure plate 12. By having multiple fixing parts arranged at intervals along the circumference of the first ring plate 114 and corresponding one-to-one with multiple first through holes 1211, materials can be effectively saved, thereby effectively reducing the weight of the end plate 113.
[0051] In one embodiment of this utility model, such as Figure 2 As shown, the end cap 11 also includes a second ring plate 116, which is arranged radially outside the first ring plate 114 and extends in a ring shape along the circumference of the first ring plate 114. The fixing part is connected between the first ring plate 114 and the second ring plate 116.
[0052] In some specific examples, such as Figure 2 As shown, the second ring plate 116 is arranged radially outside the first ring plate 114. One end of the boss 115 is connected to the second ring plate 116, and the other end of the boss 115 is connected to the first ring plate 114. The boss 115 can connect the first ring plate 114 and the second ring plate 116 together, so that the first ring plate 114, the second ring plate 116 and the boss 115 form a whole, thereby effectively improving the integrity and structural strength of the end cap 11.
[0053] In this embodiment, by providing a second ring plate 116 in the end cover 11, the second ring plate 116 is arranged radially outside the first ring plate 114 and extends in a ring shape along the circumference of the first ring plate 114. The fixing part is connected between the first ring plate 114 and the second ring plate 116, which can effectively improve the integrity and structural strength of the end cover 11, thereby effectively improving the durability and reliability of the end cover 11.
[0054] In one embodiment of this utility model, such as Figure 1 and Figure 3As shown, the bearing pressure plate 12 further includes: a first plate portion 121 and a second plate portion 122 connected together. The first plate portion 121 is arranged on the outer side of the second plate portion 122 in the radial direction of the shaft hole 112 and is located on the side of the second plate portion 122 facing the bottom wall of the bearing mounting groove 111 in the thickness direction of the end cover 11. The first through hole 1211 passes through the first plate portion 121 in the thickness direction of the end cover 11. One end of the second plate portion 122 is connected to the first plate portion 121, and the other end extends radially along the shaft hole 112 to the inner side of the bearing mounting groove 111.
[0055] In some specific examples, such as Figure 1 As shown, in the left-right direction, the first plate portion 121 is located to the left of the second plate portion 122, as... Figure 3 As shown, the first plate portion 121 is arranged on the outer side of the second plate portion 122 in the radial direction of the shaft hole 112. Further, a first through hole 1211 is provided on the first plate portion 121, and the first through hole 1211 penetrates the first plate portion 121 along the thickness direction of the end cap 11.
[0056] This embodiment provides a first plate portion 121 and a second plate portion 122 connected in the bearing pressure plate 12. The first plate portion 121 is arranged on the outer side of the second plate portion 122 in the radial direction of the shaft hole 112 and is located on the side of the second plate portion 122 facing the bottom wall of the bearing mounting groove 111 in the thickness direction of the end cover 11. The first through hole 1211 passes through the first plate portion 121 in the thickness direction of the end cover 11. One end of the second plate portion 122 is connected to the first plate portion 121, and the other end extends radially to the inner side of the bearing mounting groove 111 in the shaft hole 112. This effectively optimizes the structural structure of the bearing pressure plate 12 and improves the compactness of the bearing pressure plate 12.
[0057] In one embodiment of this utility model, such as Figure 1 and Figure 3 As shown, the first plate portion 121 and the second plate portion 122 are both flat plates arranged perpendicular to the thickness direction of the end cover 11. The bearing pressure plate 12 also includes a connecting plate portion 123, which extends along the thickness direction of the end cover 11. One end of the connecting plate portion 123 is connected to the inner end of the first plate portion 121 in the radial direction of the shaft hole 112, and the other end is connected to the outer end of the second plate portion 122 in the radial direction of the shaft hole 112. In the direction from the end cover 11 toward the bearing pressure plate 12, the connecting plate portion 123 extends obliquely toward the center direction of the shaft hole 112.
[0058] In this embodiment, both the first plate portion 121 and the second plate portion 122 are set as flat plates perpendicular to the thickness direction of the end cover 11. The bearing pressure plate 12 also includes a connecting plate portion 123, which extends along the thickness direction of the end cover 11. One end of the connecting plate portion 123 is connected to the inner end of the first plate portion 121 in the radial direction of the shaft hole 112, and the other end is connected to the outer end of the second plate portion 122 in the radial direction of the shaft hole 112. In the direction from the end cover 11 toward the bearing pressure plate 12, the connecting plate portion 123 extends obliquely toward the center direction of the shaft hole 112, which can effectively improve the structural strength and stability of the bearing pressure plate 12, thereby effectively improving the reliability of the bearing pressure plate 12.
[0059] In one embodiment of this utility model, such as Figure 3 and Figure 4 As shown, the bearing pressure plate 12 extends in a ring shape along the circumference of the shaft hole 112, or there are multiple bearing pressure plates 12, which are arranged at intervals along the circumference of the shaft hole 112.
[0060] For example, the bearing pressure plate 12 extends in a ring shape along the circumference of the shaft hole 112; or, the number of bearing pressure plates 12 is multiple, and the multiple bearing pressure plates 12 are arranged at intervals along the circumference of the shaft hole 112. For example, the number of bearing pressure plates 12 can be three, four, five, six or more. In some specific examples, the number of bearing pressure plates 12 is six.
[0061] In this embodiment, by extending the bearing pressure plate 12 into a ring shape along the circumference of the shaft hole 112, the integrity and durability of the bearing pressure plate 12 can be effectively improved, thereby effectively increasing the service life of the bearing pressure plate 12. By having multiple bearing pressure plates 12 arranged at intervals along the circumference of the shaft hole 112, materials can be effectively saved, thereby effectively reducing costs.
[0062] In one embodiment of this utility model, the bearing pressure plate 12 is a steel plate, and / or the thickness of the bearing pressure plate 12 is greater than or equal to 2 mm and less than or equal to 6 mm.
[0063] For example, the bearing pressure plate 12 is made of steel plate; or the thickness of the bearing pressure plate 12 is greater than or equal to 2 mm and less than or equal to 6 mm; or the bearing pressure plate 12 is made of steel plate, and the thickness of the bearing pressure plate 12 is greater than or equal to 2 mm and less than or equal to 6 mm. For example, the thickness of the bearing pressure plate 12 can be 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, and 6 mm.
[0064] In this embodiment, by setting the bearing pressure plate 12 as a steel plate and / or setting the thickness of the bearing pressure plate 12 to be greater than or equal to 2 mm and less than or equal to 6 mm, the structural strength and rigidity of the bearing pressure plate 12 can be effectively improved, thereby effectively improving the stability and reliability of the bearing pressure plate 12.
[0065] The motor 100 according to the second aspect of the present invention includes: a housing 14, an end cap assembly 10 according to the first aspect of the present invention, a bearing 15, and a motor 100 shaft.
[0066] The housing 14 defines a mounting cavity 141 that is open on one side; the end cap assembly 10 covers the open side of the mounting cavity 141; the bearing 15 is disposed in the bearing mounting groove 111, and along the thickness direction of the end cap 11, the outer ring of the bearing 15 is sandwiched between the bottom wall of the bearing mounting groove 111 and the bearing pressure plate 12; one end of the motor 100 shaft is located in the mounting cavity 141, and the other end of the motor 100 shaft extends out of the housing 14 through the inner ring of the bearing 15 and the shaft hole 112.
[0067] According to the embodiment of the present utility model, by providing the end cover assembly 10 of the first aspect, the motor 100 can not only effectively improve the compactness of the motor 100 and reduce the size of the motor 100, but also effectively improve the reliability of the motor 100.
[0068] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0069] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0070] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0071] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0072] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
Claims
1. An end cap assembly for a motor, characterized in that, include: An end cap is provided, having a bearing mounting groove and a shaft hole. The bearing mounting groove is formed by a recess on one side surface of the end cap, and the shaft hole extends through the bottom wall of the bearing mounting groove along the thickness direction of the end cap. A fixing part is provided on the periphery of the bearing mounting groove. A bearing pressure plate is disposed on one side of the end cover and seals a portion of the opening of the bearing mounting groove. The bearing pressure plate is provided with a plurality of first through holes arranged at intervals. Multiple fasteners are provided, which are fastened to the fixing part through the corresponding first through hole, and in the thickness direction of the end cap, the end face of the fastener facing away from the fixing part does not extend beyond the side surface of the bearing pressure plate facing away from the end cap.
2. The end cap assembly according to claim 1, characterized in that, The end cap includes: End plate, wherein the shaft hole extends through the end plate along the thickness direction of the end plate; A first annular plate is connected to one side of the end plate in the thickness direction and extends circumferentially along the shaft hole in an annular shape. The first annular plate cooperates with the end plate to define the bearing mounting groove. Along the thickness direction of the end plate, the height of the first annular plate is configured to be less than the height of the outer ring of the bearing provided in the bearing mounting groove. The fixing part is a boss connected to one side surface of the end plate and is arranged on the radially outer side of the first annular plate.
3. The end cap assembly according to claim 2, characterized in that, The fixing part is connected to the outer peripheral surface of the first ring plate and extends outward along the radial direction of the first ring plate. In the thickness direction of the end plate, the height of the fixing part protruding from one side surface of the end plate is lower than the height of the first ring plate protruding from one side surface of the end plate.
4. The end cap assembly according to claim 3, characterized in that, The fixing part extends in a ring shape along the circumference of the first ring plate; or, the number of fixing parts is multiple, and the multiple fixing parts are arranged at intervals along the circumference of the first ring plate and correspond one-to-one with the multiple first through holes.
5. The end cap assembly according to claim 3, characterized in that, The end cap further includes a second ring plate, which is arranged radially outside the first ring plate and extends in a ring shape along the circumference of the first ring plate. The fixing part is connected between the first ring plate and the second ring plate.
6. The end cap assembly according to any one of claims 1-5, characterized in that, The bearing pressure plate further includes: a first plate portion and a second plate portion connected together, the first plate portion being arranged radially outside the second plate portion in the shaft hole, and located on the side of the second plate portion facing the bottom wall of the bearing mounting groove in the thickness direction of the end cover. The first through hole extends through the first plate portion along the thickness direction of the end cap, one end of the second plate portion is connected to the first plate portion, and the other end extends radially along the shaft hole to the inner side of the bearing mounting groove.
7. The end cap assembly according to claim 6, characterized in that, Both the first plate portion and the second plate portion are flat plates arranged perpendicular to the thickness direction of the end cap. The bearing pressure plate further includes a connecting plate portion, which extends along the thickness direction of the end cover. One end of the connecting plate portion is connected to the inner end of the first plate portion in the radial direction of the shaft hole, and the other end is connected to the outer end of the second plate portion in the radial direction of the shaft hole. In the direction from the end cover toward the bearing pressure plate, the connecting plate portion extends obliquely toward the center of the shaft hole.
8. The end cap assembly according to claim 7, characterized in that, The bearing pressure plate extends in a ring shape along the circumference of the shaft hole, or there are multiple bearing pressure plates, which are arranged at intervals along the circumference of the shaft hole.
9. The end cap assembly according to claim 1, characterized in that, The bearing plate is a steel plate, and / or the thickness of the bearing plate is greater than or equal to 2 mm and less than or equal to 6 mm.
10. An electric motor, characterized in that, include: A housing that defines a mounting cavity open on one side; The end cap assembly according to any one of claims 1-9, wherein the end cap assembly covers the open side of the mounting cavity; The bearing is disposed in the bearing mounting groove, and along the thickness direction of the end cover, the outer ring of the bearing is sandwiched between the bottom wall of the bearing mounting groove and the bearing pressure plate. The motor shaft has one end located inside the mounting cavity and the other end extending out of the housing through the inner ring of the bearing and the shaft hole.