Centrally-mounted motor mounting assembly

Abstract

The utility model provides a centrally-mounted motor mounting assembly. According to the centrally-mounted motor mounting assembly, a motor fixing frame comprises a first fixing hole, a second fixing hole and a third fixing hole; the motor comprises an output shaft and a motor shaft; a connecting line from the axis of the motor shaft to the axis of the output shaft forms a first reference line; a reference circle is formed with the axis of the output shaft as the circle center and the distance L4 between the axis of the output shaft and the axis of the motor shaft as the radius, the first fixing hole and the second fixing hole are located in the reference circle, and the third fixing hole is located outside the reference circle. The connecting line of the axis of the third fixing hole and the axis of the output shaft forms a fourth reference line, the fourth reference line and the reference circle form an intersection point between the output shaft and the third fixing hole, the distance L5 between the intersection point and the axis of the third fixing hole is smaller than the distance L4 between the intersection point and the axis of the output shaft, and L5 / L4 is smaller than 0.5. The motor mounting rack solves the problem of high cost caused by high requirement on the structural strength of the motor mounting rack in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of motor equipment technology, and more specifically, to a mid-mounted motor mounting assembly. Background Technology

[0002] Mid-drive motors are typically mounted on the vehicle's center axle and connected to the drive wheels via chains or gears. They directly and efficiently convert the electric motor's driving force into wheel rotation, or connect to other structural components via the motor shaft. In existing technology, the mounting points for connecting the mid-drive motor to the mounting bracket are angled along the motor's center axle, and most mounting points are distributed at an angle around the motor's center axle. Some mounting points are significantly distanced from the center axle, resulting in a large lever arm and a relatively large torque applied to the mounting points. When the mid-drive motor shaft connects to the mounting bracket via these mounting points, the mounting bracket needs sufficient structural strength. Excessive torque can also cause unnecessary stress on the bracket during motor operation, affecting its long-term stability and reliability. Improving the structural strength of the mounting bracket requires increasing its structural thickness, thus increasing the cost. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a mid-mounted motor mounting assembly with low cost and high structural strength.

[0004] To achieve the above objectives, the technical solution provided by an embodiment of this utility model is as follows:

[0005] A mid-drive motor mounting assembly includes: a motor mounting bracket, the motor mounting bracket including a first mounting hole, a second mounting hole, and a third mounting hole; a motor, the motor including an output shaft and a motor shaft, wherein the first mounting hole, the second mounting hole, and the third mounting hole are arranged around the outer periphery of the motor and are all spaced apart from the output shaft; a plane perpendicular to the motor shaft and / or the output shaft is used as a projection plane, and within the projection plane, a line connecting the axis of the motor shaft to the axis of the output shaft forms a first reference line, and the axes of the first mounting hole, the second mounting hole, and the third mounting hole are all located at the first reference line. On the same side of a reference line; a reference circle is formed with the output shaft center as the center and the distance L4 between the output shaft center and the motor shaft center as the radius. The first and second fixing holes are located inside the reference circle, and the third fixing hole is located outside the reference circle. The line connecting the center of the third fixing hole and the output shaft center forms a fourth reference line. The fourth reference line and the reference circle intersect at a point between the output shaft and the third fixing hole. The distance L5 between the intersection point and the center of the third fixing hole is less than the distance L4 between the intersection point and the output shaft center, and L5 / L4 < 0.5. By reasonably arranging the positions of the fixing holes on the motor mounting bracket, the structural strength requirements of the motor mounting bracket can be reduced, avoiding excessive cost of the motor mounting bracket. Specifically, all three fixing holes are located on the same side of the line connecting the output shaft and the motor shaft. The first and second fixing holes are located within a circular area centered on the output shaft. This confines the stress area of ​​the entire motor mounting bracket to the region corresponding to the output shaft. Consequently, after the motor is installed on the mounting bracket, the stress is more concentrated, allowing the mounting bracket to achieve optimal load-bearing capacity. This reduces the structural strength requirements of the mounting bracket and avoids increasing costs by thickening the bracket to achieve sufficient structural strength. The L5 / L4 < 0.5 setting also prevents the distance between the third fixing hole and the output shaft from being too large, improving the load-bearing capacity of the third fixing hole area. At the same time, the load distribution is optimized, allowing the weight of the motor and the torque generated during operation to be more evenly distributed on the mounting bracket, significantly improving the structural stability and reliability of the mid-drive motor mounting assembly.

[0006] In some embodiments, a second reference line is formed from the axis of the first fixing hole to the axis of the output shaft, and a third reference line is formed from the axis of the second fixing hole to the axis of the output shaft. An angle A is formed between the second and third reference lines; an angle B is formed between the fourth and third reference lines; and angle A is greater than angle B. By defining the relationship between angles A and B, the positions of the first, second, and third fixing holes are defined, thereby optimizing the force arm.

[0007] In some embodiments, the included angle A is greater than 85 degrees and less than 95 degrees; and / or the included angle B is greater than 50 degrees and less than 60 degrees. By reasonably setting the ranges of included angle A and included angle B, the three fixing holes have a better load-bearing effect, making the stress area of ​​the entire motor mounting bracket concentrated, which can adapt to the characteristics of concentrated stress at the output shaft.

[0008] In some embodiments, the first distance L1 between the axis of the first fixing hole and the axis of the output shaft is greater than the second distance L2 between the axis of the second fixing hole and the axis of the output shaft; and / or, the third distance L3 between the axis of the third fixing hole and the axis of the output shaft is greater than the first distance L1 between the axis of the first fixing hole and the axis of the output shaft. By reasonably setting L1, L2, and L3, two of the three fixing holes are made closer to the output shaft, thereby achieving the best load-bearing effect without needing to strengthen the structural strength of the motor mounting bracket itself.

[0009] In some embodiments, the ratio of the first distance L1 to the third distance L3 is greater than 0.6 and less than 1.2. By limiting the ratio of L1 and L3, it is possible to avoid excessive spacing between the third fixing hole and the axis of the output shaft, which would result in excessive stress at the third fixing hole.

[0010] In some embodiments, when the motor is in the installation position, the second reference line extends horizontally; the third reference line extends vertically; and the fifth reference line, from the axis of the second fixing hole to the axis of the third fixing hole, extends horizontally. By defining the directions of the second, third, and fifth reference lines, the distribution of the first, second, and third fixing holes can be further optimized, which is beneficial for improving load-bearing capacity and ease of installation.

[0011] In some embodiments, the motor mounting bracket further includes a support plate, a first mounting plate, and a second mounting plate. The first mounting plate and the second mounting plate are respectively disposed on opposite sides of the support plate and form receiving recesses. The motor is at least partially located within the receiving recesses. Multiple boss structures are symmetrically arranged on the inner sides of the first mounting plate and the second mounting plate. These boss structures correspond to the first fixing hole, the second fixing hole, and the third fixing hole, respectively, extending from the outer surface of the motor mounting bracket to the boss surface of the boss structure. By providing multiple boss structures on the inner sides of the first mounting plate and the second mounting plate, with each fixing hole corresponding to one boss structure, the structural strength of the motor mounting bracket can be improved.

[0012] In some embodiments, the motor further includes multiple connecting seats, which correspond to the first fixing hole, the second fixing hole, and the third fixing hole, respectively. When the motor is in the installation position, the connecting seats abut against the boss surface. The multiple connecting seats are respectively provided with motor connection holes that communicate with the first fixing hole, the second fixing hole, and the third fixing hole. The method of correspondingly setting the connecting seats to the boss surface facilitates the corresponding installation of the motor and the motor mounting bracket.

[0013] In some embodiments, the motor further includes a plurality of motor connection holes corresponding to the first fixing hole, the second fixing hole, and the third fixing hole, respectively. The mid-mounted motor mounting assembly also includes a plurality of locking components, which are respectively disposed corresponding to the first fixing hole, the second fixing hole, and the third fixing hole and all pass through the motor connection holes. Each locking component includes a coaxial and detachably connected first locking member and second locking member. The connection between the motor and the motor mounting bracket is achieved by the locking components passing through the motor connection holes and fixing holes, and the coaxial arrangement of the first locking member and the second locking member can improve the positioning accuracy of the motor and the motor mounting bracket.

[0014] In some embodiments, the first locking member and the second locking member have different axial lengths; and / or, the first locking member and the second locking member are threaded together; and / or, the ends of the first locking member and the second locking member that are close to each other are fitted together with a concave-convex fitting. By setting the first locking member and the second locking member to different lengths, it is easy to distinguish the installation direction, and the connection method of threaded connection or concave-convex fitting can be selected according to actual needs, which simplifies the processing.

[0015] In some embodiments, the first, second, and third fixing holes form stepped hole sections on the outer surface of the motor mounting bracket. Both the first and second locking members include: a rod section; and a head, which is disposed at the first end of the rod section, with a radial area larger than the radial area of ​​the rod section. The head is accommodated in the stepped hole section, and a connecting section is formed at the second end of the rod section. By configuring both the first and second locking members as both rod sections and heads, the stepped hole section of the motor mounting bracket limits the head, thereby preventing the first and second locking members from disengaging from the motor connection hole after engagement, thus ensuring an effective connection between the motor and the motor mounting bracket.

[0016] This utility model has the following beneficial effects:

[0017] By rationally arranging the positions of the fixing holes on the motor mounting bracket, the structural strength requirements of the motor mounting bracket can be reduced, avoiding excessive cost. Specifically, all three fixing holes are located on the same side of the line connecting the output shaft and the motor shaft, and the first and second fixing holes are located within a circular area centered on the output shaft. This confines the stress area of ​​the entire motor mounting bracket to the region corresponding to the output shaft. Consequently, after the motor is installed on the mounting bracket, the stress is more concentrated, allowing the mounting bracket to achieve optimal load-bearing capacity. This ultimately reduces the structural strength requirements of the motor mounting bracket, avoiding the cost increase caused by thickening the mounting bracket to achieve sufficient structural strength. The L5 / L4 < 0.5 setting also prevents the distance between the third fixing hole and the output shaft from being too large, improving the load-bearing capacity of the third fixing hole area. Simultaneously, the optimized load distribution allows the weight of the motor and the torque generated during operation to be more evenly distributed on the mounting bracket, significantly improving the structural stability and reliability of the mid-mounted motor mounting assembly. This invention solves the problem of high cost caused by high structural strength requirements for motor mounting brackets in existing technologies. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a mid-mounted motor mounting assembly provided in a specific embodiment of the present invention;

[0020] Figure 2 for Figure 1 Cross-sectional view of AA;

[0021] Figure 3 for Figure 1 Cross-sectional view of BB;

[0022] Figure 4 An exploded view of a mid-mounted motor mounting assembly provided in a specific embodiment of this utility model;

[0023] Figure 5 A schematic diagram of reference lines for a mid-mounted motor mounting assembly provided in a specific embodiment of this utility model;

[0024] Figure 6 This is a schematic diagram showing the dimensions and structure of a mid-mounted motor mounting assembly provided in a specific embodiment of the present invention.

[0025] Figure 7This is a schematic diagram of the structure of a motor mounting bracket provided in a specific embodiment of the present invention.

[0026] The above figures include the following reference numerals:

[0027] 10. Motor mounting bracket; 11. First mounting hole; 12. Second mounting hole; 13. Third mounting hole; 14. Support plate; 15. First mounting plate; 16. Second mounting plate; 17. Accommodating recess; 18. Boss structure; 19. Stepped hole section; 20. Motor; 21. Output shaft; 22. Connecting seat; 221. Motor connecting hole; 23. Housing; 30. Second reference line; 40. Third reference line; 50. Fourth reference line; 60. Fifth reference line; 70. Locking assembly; 71. First locking element; 72. Second locking element; 721. Rod section; 722. Head; 80. Screw; 90. Motor shaft; 100. First reference line; 200. Reference circle. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] In the description of the embodiments of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] In the description of the embodiments of this utility model, it should also be noted that the terms "first" and "second" used herein do not specifically refer to any order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0035] The technical solution of this utility model will now be described with reference to the accompanying drawings.

[0036] To address the high cost issue arising from the stringent structural strength requirements of existing motor mounting brackets, this invention provides a mid-mounted motor mounting assembly.

[0037] In some embodiments, such as Figures 1 to 7 As shown, the mid-drive motor mounting assembly includes a motor mounting bracket 10, a motor 20, and a locking component 70. The motor 20 includes two symmetrically arranged housings 23 connected by screws 80. During installation, the motor 20 is partially placed into the receiving recess 17 on the motor mounting bracket 10, and then the locking component 70 is passed through the fixing holes of the motor mounting bracket 10 and the motor connection holes 221 on the motor 20 to fix the motor 20 to the motor mounting bracket 10. There are three fixing holes and three corresponding motor connection holes 221. When the locking component 70 passes through the fixing holes and the motor connection holes 221, it is limited by the motor mounting bracket 10 and cannot be dislodged, ensuring the connection effect. By designing the position of the three fixing holes, the load-bearing capacity of the motor mounting bracket 10 is improved without increasing the thickness or cost.

[0038] The following is a detailed explanation of the mid-drive motor mounting components.

[0039] In some embodiments, such as Figures 1 to 7As shown, the mid-drive motor mounting assembly includes a motor mounting bracket 10 and a motor 20. The motor mounting bracket 10 includes a first mounting hole 11, a second mounting hole 12, and a third mounting hole 13. The motor 20 includes an output shaft 21 and a motor shaft 90, wherein the first mounting hole 11, the second mounting hole 12, and the third mounting hole 13 are arranged around the outer periphery of the motor 20 and are all spaced apart from the output shaft 21. Taking a plane perpendicular to the motor shaft 90 and / or the output shaft 21 as a projection plane, a first reference line 100 is formed in the projection plane by connecting the axis of the motor shaft 90 to the axis of the output shaft 21. The axes of the first mounting hole 11, the second mounting hole 12, and the third mounting hole 13 are all located on the same side of the first reference line 100. A reference circle 200 is formed with the center of the output shaft 21 as the center and the distance L4 between the center of the output shaft 21 and the center of the motor shaft 90 as the radius. The first fixing hole 11 and the second fixing hole 12 are located inside the reference circle 200, and the third fixing hole 13 is located outside the reference circle 200. The line connecting the center of the third fixing hole 13 and the center of the output shaft 21 forms a fourth reference line 50. The fourth reference line 50 and the reference circle 200 intersect at a point between the output shaft 21 and the third fixing hole 13. The distance L5 between the intersection point and the center of the third fixing hole 13 is less than the distance L4 between the intersection point and the center of the output shaft 21, and L5 / L4 < 0.5.

[0040] By rationally arranging the positions of the fixing holes on the motor mounting bracket 10, the structural strength requirements of the motor mounting bracket 10 can be reduced, thus avoiding excessive cost of the motor mounting bracket 10. Specifically, all three fixing holes are located on the same side of the line connecting the output shaft 21 and the motor shaft 90. The first fixing hole 11 and the second fixing hole 12 are located within a circular area centered on the output shaft 21. This limits the stress area of ​​the entire motor mounting bracket 10 to the area on the motor mounting bracket 10 corresponding to the output shaft 21. Consequently, after the motor 20 is installed on the motor mounting bracket 10, the stress is more concentrated, enabling the motor mounting bracket 10 to achieve optimal load-bearing performance. This reduces the structural strength requirements of the motor mounting bracket 10 and avoids increasing costs by thickening the motor mounting bracket 10 to obtain sufficient structural strength. The setting of L5 / L4 < 0.5 also avoids an excessively large distance between the third fixing hole 13 and the output shaft 21, improving the load-bearing effect of the area of ​​the third fixing hole 13. At the same time, the load distribution is optimized, allowing the weight of the motor 20 and the torque generated during operation to be more evenly distributed on the motor mounting bracket 10. This significantly improves the structural stability and reliability of the mid-mounted motor mounting assembly without increasing the cost of the motor mounting bracket 10.

[0041] It should be noted that the motor shaft 90 and output shaft 21 of motor 20 are connected by a transmission assembly, such as gear transmission or worm gear transmission. The transmission assembly is mainly located at the output shaft 21, which has a relatively large mass. In actual use, the mid-drive motor mounting assembly can be installed on vehicles, such as electric bicycles, electric bikes, and motorcycles, and a chainring and pedals can be installed on the output shaft 21, resulting in a relatively large mass near the output shaft 21 of motor 20. To improve the fixing effect of motor 20 and prevent damage to the structure of motor mounting bracket 10 due to its own weight, common methods include increasing the thickness of motor mounting bracket 10 or using a higher strength material to make motor mounting bracket 10. Although this method can improve the structural strength of motor mounting bracket 10, it also brings relatively high costs. This application, however, rationally arranges the positions of the three fixing holes based on the large mass of output shaft 21. By placing the three fixing holes near output shaft 21 and adjusting the distribution of the three fixing holes, the stress on motor mounting bracket 10 is optimized, improving the stress on motor mounting bracket 10 without increasing costs.

[0042] In some embodiments, such as Figures 5 to 6 As shown, the axis of the first fixing hole 11 forms a second reference line 30 to the axis of the output shaft 21, and the axis of the second fixing hole 12 forms a third reference line 40 to the axis of the output shaft 21. An angle A is formed between the second reference line 30 and the third reference line 40. An angle B is formed between the fourth reference line 50 and the third reference line 40. Angle A is greater than angle B. By limiting the relationship between angles A and B, the positions of the first fixing hole 11, the second fixing hole 12, and the third fixing hole 13 are limited, thereby optimizing the force arm.

[0043] Specifically, the smaller angle of included angle B allows the third fixing hole 13 to be positioned close to the output shaft 21, thus ensuring that all three fixing holes are located near the output shaft 21. During vehicle movement, the mid-mounted motor mounting assembly on the vehicle will be subjected to significant downward pressure from being stepped on. The setting of included angles A and B can concentrate the three fixing holes near the output shaft 21, thereby improving the load-bearing capacity of the motor mounting bracket 10.

[0044] In some embodiments, when the motor 20 is in the installation position, the second reference line 30 extends horizontally. The third reference line 40 extends vertically. The fifth reference line 60, from the axis of the second fixing hole 12 to the axis of the third fixing hole 13, extends horizontally.

[0045] Specifically, the second reference line 30 and the third reference line 40 are perpendicular to each other, forming a coordinate system with the output shaft 21 as the starting point. This facilitates precise alignment between the motor 20 and the motor mounting bracket 10, and also makes it easier to create the motor connection hole 221 on the motor 20. Furthermore, when maintenance is required, the three reference lines divide the motor 20 into multiple areas, allowing for quick identification of the repair area and reducing maintenance time. The specific arrangement of the mounting holes ensures precise alignment of the motor 20 during installation, improving installation efficiency and accuracy. The installation process is simpler and faster, while maintaining the installation accuracy of the motor 20 and reducing the need for subsequent adjustments.

[0046] Furthermore, the arrangement of the second fixing hole 12 and the third fixing hole 13 on the same reference line allows for a horizontal span between the two fixing holes, improving the stability of the motor 20 in the horizontal direction. When the motor 20 encounters a large lateral force, such as when the vehicle is turning, it can provide more stable support.

[0047] In some embodiments, the included angle A is greater than 85 degrees and less than 95 degrees; and / or the included angle B is greater than 50 degrees and less than 60 degrees. By reasonably setting the ranges of included angle A and included angle B, the three fixing holes have a better load-bearing effect, and the force-bearing area of ​​the entire motor fixing bracket 10 is concentrated, which can adapt to the characteristics of concentrated force at the output shaft 21.

[0048] Specifically, when the included angle A is within the range of 85 degrees to 95 degrees, the lever arm between the first fixing hole 11, the second fixing hole 12, and the output shaft 21 will be the smallest, resulting in lower structural strength requirements for the motor mounting bracket 10. Adjusting the included angle between the fixing holes achieves optimal force distribution and improves the installation stability of the motor 20. When the motor 20 is subjected to external forces, the force decomposition is more uniform, reducing the vibration and noise of the motor 20.

[0049] In some embodiments, the included angle A is 90 degrees and the included angle B is 55 degrees.

[0050] Specifically, the distance between the first fixing hole 11 and the second fixing hole 12 and the output shaft 21 is the smallest, and the third fixing hole 13 is also set near the output shaft 21 to optimize the load distribution on the motor mounting bracket 10.

[0051] In some embodiments, in addition to limiting the included angle between the three fixing holes to improve load-bearing capacity, the load-bearing capacity can also be improved by limiting the distance between the fixing holes and the output shaft 21. The first distance L1 between the axis of the first fixing hole 11 and the axis of the output shaft 21 is greater than the second distance L2 between the axis of the second fixing hole 12 and the axis of the output shaft 21; and / or, the third distance L3 between the axis of the third fixing hole 13 and the axis of the output shaft 21 is greater than the first distance L1 between the axis of the first fixing hole 11 and the axis of the output shaft 21. By reasonably setting L1, L2, and L3, two of the three fixing holes are closer to the output shaft 21, thereby achieving the best load-bearing effect without needing to strengthen the structural strength of the motor mounting bracket 10 itself.

[0052] Specifically, the third distance L3 > the first distance L1 > the second distance L2. A larger distance between the fixing hole and the output shaft 21 results in a greater torque at the fixing hole. Designing the third distance L3 to be greater than the first distance L1 means that the third fixing hole 13 is farther from the center of the output shaft 21, forming a longer lever arm. Furthermore, because the third distance L3 > the first distance L1, the position of the third fixing hole 13 can be adjusted more flexibly, helping to optimize the spatial layout while maintaining structural stability. The longer lever arm L3 can provide design redundancy in certain situations; even if the first fixing hole 11 and the second fixing hole 12 are damaged, the third fixing hole 13 can still bear greater load-bearing requirements, increasing the safety and reliability of the system. By adjusting the distance between the fixing hole and the output shaft 21, the force transmission path is optimized, and the lever arm length is reduced, thereby lowering the strength requirements for the motor mounting bracket 10.

[0053] In some embodiments, the ratio of the first distance L1 to the third distance L3 is greater than 0.6 and less than 1.2. By limiting the ratio of the first distance L1 to the third distance L3, it is possible to avoid an excessively large distance between the third fixing hole 13 and the axis of the output shaft 21, which would result in excessive stress at the third fixing hole 13.

[0054] Specifically, limiting the ratio of the first distance L1 to the third distance L3 can further reduce the torque acting on the motor mounting bracket 10.

[0055] In some embodiments, such as Figure 3 and Figure 7As shown, the motor mounting bracket 10 also includes a support plate 14, a first mounting plate 15, and a second mounting plate 16. The first mounting plate 15 and the second mounting plate 16 are respectively disposed on opposite sides of the support plate 14 and form receiving recesses 17. The motor 20 is at least partially located within the receiving recesses 17. Multiple boss structures 18 are symmetrically arranged on the inner sides of the first mounting plate 15 and the second mounting plate 16. The multiple boss structures 18 are respectively corresponding to the first fixing hole 11, the second fixing hole 12, and the third fixing hole 13. The first fixing hole 11, the second fixing hole 12, and the third fixing hole 13 extend from the outer surface of the motor mounting bracket 10 to the boss surface of the boss structure 18. By providing multiple boss structures 18 on the inner sides of the first mounting plate 15 and the second mounting plate 16, with each fixing hole corresponding to one boss structure 18, the structural strength of the motor mounting bracket 10 can be improved.

[0056] Specifically, the first mounting plate 15, the support plate 14, and the second mounting plate 16 are sequentially connected and integrally formed, facilitating processing and production. Multiple boss structures 18 are integrally formed with the motor mounting bracket 10, thereby improving the connection strength between the boss structures 18 and the motor mounting bracket 10. The two perpendicular sides of the boss structure 18 are connected to the mounting plate and the support plate 14, respectively. The boss structure 18 not only strengthens the structural strength at the fixing hole but also acts as a reinforcing rib, connecting with the support plate 14, the first mounting plate 15, and the second mounting plate 16, thus enhancing the overall structural strength of the motor mounting bracket 10.

[0057] In some embodiments, the thickness of the boss structure 18 should not be too small to ensure a reinforcing effect. The boss structure 18 strengthens the motor mounting bracket 10, allowing for a reduction in thickness at other locations on the motor mounting bracket 10. For example, the areas on the first mounting plate 15 and the second mounting plate 16 without the boss structure 18 can be made relatively thinner. This reduces the weight of the motor mounting bracket 10 and the amount of material used, achieving cost reduction. The motor mounting assembly has a lighter structure while ensuring sufficient strength and stability.

[0058] In some embodiments, the support plate 14 is an arc-shaped plate, and the inner side of the support plate 14 serves as the bottom surface of the accommodating recess 17. The first mounting plate 15 and the second mounting plate 16 are symmetrically arranged, and their inner sides serve as the side surfaces of the accommodating recess 17, thereby accommodating the top of the motor 20.

[0059] In other embodiments, the boss structure 18 is simply provided on the mounting plate, and the boss structure 18 is cylindrical.

[0060] In some embodiments, such as Figure 4As shown, the motor 20 also includes multiple connecting seats 22, which correspond to the first fixing hole 11, the second fixing hole 12, and the third fixing hole 13, respectively. When the motor 20 is in the installation position, the connecting seats 22 abut against the boss surface. The multiple connecting seats 22 are respectively provided with motor connecting holes 221 that communicate with the first fixing hole 11, the second fixing hole 12, and the third fixing hole 13. The way the connecting seats 22 are correspondingly arranged with the boss surface facilitates the corresponding arrangement of the motor 20 and the motor mounting bracket 10.

[0061] Specifically, the motor connection hole 221 on the connector 22 is set to correspond to the fixing hole, and the locking component 70 passes through the motor connection hole 221 and the fixing hole to connect the motor mounting bracket 10 and the motor 20.

[0062] In some embodiments, the connector 22 is disposed on the edge of the motor 20, and a recess is formed on the edge of the motor 20. The shape of the recess is adapted to the boss structure 18, thereby reducing the space occupied by the mid-mounted motor mounting assembly along the axial direction of the output shaft 21. The connector 22 is disposed conveniently on the motor 20, which can precisely avoid the entire boss structure 18. It also makes the motor installation process simpler and faster, and the boss structure 18 can quickly extend into the connector 22 to ensure the installation accuracy of the motor 20.

[0063] In some embodiments, such as Figure 2 As shown, the motor 20 also includes multiple motor connection holes 221 corresponding to the first fixing hole 11, the second fixing hole 12, and the third fixing hole 13, respectively. The mid-mounted motor mounting assembly also includes multiple locking components 70, which are respectively disposed corresponding to the first fixing hole 11, the second fixing hole 12, and the third fixing hole 13 and all pass through the motor connection holes 221. Each locking component 70 includes a coaxial and detachably connected first locking member 71 and second locking member 72. The connection between the motor 20 and the motor mounting bracket 10 is achieved by the locking components 70 passing through the motor connection holes 221 and the fixing holes. The coaxial arrangement of the first locking member 71 and the second locking member 72 can improve the positioning accuracy of the motor 20 and the motor mounting bracket 10.

[0064] Specifically, the inner diameters of the motor connection hole 221 and the fixing hole are the same, and they are adapted to the outer diameters of the first locking member 71 and the second locking member 72. The coaxial arrangement of the first locking member 71 and the second locking member 72 facilitates connection and assembly.

[0065] In some embodiments, the first locking member 71 and the second locking member 72 have different axial lengths. By setting the first locking member 71 and the second locking member 72 to different lengths, it is easier to distinguish the installation direction and facilitate connection.

[0066] In some embodiments, the first locking member 71 and the second locking member 72 are configured with a concave-convex fitting at their ends close to each other. Specifically, the first locking member 71 has a protrusion at its end facing the second locking member 72, and the second locking member 72 has a recess at its end facing the first locking member 71. The protrusion extends into the recess and is adapted to fit the recess. This invention, through the concave-convex fitting assembly method, can increase the assembly area between the first locking member 71 and the second locking member 72, ensuring assembly reliability. Furthermore, the specific concave-convex fitting method can be selected according to actual needs for connection, simplifying processing.

[0067] In some embodiments, the first locking member 71 and the second locking member 72 are threaded together. Alternatively, the first locking member 71 and the second locking member 72 can be fixed by a snap-fit ​​riveting method. In the connection method provided above, using threads to connect two locking members of different lengths achieves precise alignment and a secure connection between the motor 20 and the motor mounting bracket 10, while ensuring the stability and reliability of the connection.

[0068] Specifically, an internal thread can be provided on the inner wall of the recess, and an external thread can be provided on the protrusion to achieve a threaded connection between the first locking member 71 and the second locking member 72.

[0069] In other embodiments, the first locking member 71 has a recess at one end facing the second locking member 72, and the second locking member 72 has a protrusion at one end facing the first locking member 71. The protrusion extends into the recess, and an internal thread is provided on the inner wall of the recess, while an external thread is provided on the protrusion.

[0070] In some embodiments, the first fixing hole 11, the second fixing hole 12, and the third fixing hole 13 form a stepped hole section 19 on the outer surface of the motor mounting bracket 10. The first locking member 71 and the second locking member 72 both include a rod section 721 and a head 722. The head 722 is disposed at the first end of the rod section 721, and the radial area of ​​the head 722 is larger than the radial area of ​​the rod section 721. The head 722 is accommodated in the stepped hole section 19, and a connecting section is formed at the second end of the rod section 721.

[0071] Specifically, the stepped hole section 19 includes a first section and a second section connected in sequence. The diameter of the second section is adapted to the outer diameter of the rod section 721, and the inner diameter of the first section is adapted to the outer diameter of the head 722. The first locking member 71 and the second locking member 72 are limited by the head 722 abutting against the bottom wall surface of the first section. One of the connecting sections of the first locking member 71 and the second locking member 72 is provided with a protrusion, and the other is provided with a recess.

[0072] In some other embodiments, the first locking member 71 is a nut and the second locking member 72 is a bolt. The first locking member 71 is located in the stepped hole section 19 at one end of the motor mounting bracket 10. The second locking member 72 extends from the other end of the motor mounting bracket 10 into the motor mounting bracket 10, passes through the fixing hole and the motor connection hole 221 in sequence, and connects with the first locking member 71, thereby fixing the motor 20.

[0073] This invention has the following advantages: By rationally arranging the positions of the fixing holes on the motor mounting bracket 10, the structural strength requirements of the motor mounting bracket 10 can be reduced, thus avoiding excessive cost. Specifically, all three fixing holes are located on the same side of the line connecting the output shaft 21 and the motor shaft 90, and the first fixing hole 11 and the second fixing hole 12 are located within a circular area centered on the output shaft 21. This confines the stress area of ​​the entire motor mounting bracket 10 to the area corresponding to the output shaft 21. Consequently, after the motor 20 is installed on the motor mounting bracket 10, the stress is more concentrated, enabling the motor mounting bracket 10 to achieve optimal load-bearing capacity and ultimately reducing the structural strength requirements of the motor mounting bracket 10. To avoid increasing costs by thickening the motor mounting bracket 10 to obtain sufficient structural strength, the setting of L5 / L4 < 0.5 also avoids an excessive distance between the third mounting hole 13 and the output shaft 21, improving the load-bearing effect in the area of ​​the third mounting hole 13. At the same time, the load distribution is optimized, so that the weight of the motor 20 and the torque generated during operation can be more evenly distributed on the motor mounting bracket 10, significantly improving the structural stability and reliability of the mid-mounted motor mounting assembly, without increasing the cost of the motor mounting bracket 10.

[0074] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0075] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An electric motor mounting assembly, characterized by, The motor fixing frame comprises a first fixing hole, a second fixing hole and a third fixing hole; The motor comprises an output shaft and a motor shaft, wherein the first fixing hole, the second fixing hole and the third fixing hole are arranged around the outer periphery of the motor and are each spaced apart from the output shaft; A projection plane perpendicular to the motor shaft and / or the output shaft is taken as a projection plane, In the projection plane, the connecting line between the axis center of the motor shaft and the axis center of the output shaft forms a first reference line, and the axis center of the first fixing hole, the axis center of the second fixing hole and the axis center of the third fixing hole are all located on the same side of the first reference line; Taking the axis center of the output shaft as the center and the distance L4 between the axis center of the output shaft and the axis center of the motor shaft as the radius, a reference circle is formed, the first fixing hole and the second fixing hole are located within the reference circle, and the third fixing hole is located outside the reference circle; The connecting line between the axis center of the third fixing hole and the axis center of the output shaft forms a fourth reference line, the fourth reference line and the reference circle form an intersection point between the output shaft and the third fixing hole, the distance L5 between the intersection point and the axis center of the third fixing hole is less than the distance L4 between the intersection point and the axis center of the output shaft, and L5 / L4<0.

5.

2. The motor mounting assembly according to claim 1, wherein the axis center of the first fixing hole to the axis center of the output shaft forms a second reference line, the axis center of the second fixing hole to the axis center of the output shaft forms a third reference line, and the second reference line and the third reference line form an included angle A; the fourth reference line and the third reference line form an included angle B; the included angle A is greater than the included angle B.

3. The motor mounting assembly according to claim 2, wherein the included angle A is greater than 85 degrees and less than 95 degrees; and / or the included angle B is greater than 50 degrees and less than 60 degrees.

4. The motor mounting assembly according to claim 1, wherein a first distance L1 between the axis center of the first fixing hole and the axis center of the output shaft is greater than a second distance L2 between the axis center of the second fixing hole and the axis center of the output shaft; and / or a third distance L3 between the axis center of the third fixing hole and the axis center of the output shaft is greater than the first distance L1 between the axis center of the first fixing hole and the axis center of the output shaft. The ratio of the first distance L1 to the third distance L3 is greater than 0.6 and less than 1.

2.

5. The motor mount assembly of claim 4, wherein, When the motor is in a position to be installed, 6. The motor winder mounting assembly of claim 2, wherein, the second reference line extends in a horizontal direction; the third reference line extends in a vertical direction; a fifth reference line between the axis center of the second fixing hole and the axis center of the third fixing hole extends in a horizontal direction. ​ 7. The motor mount assembly of claim 1, wherein, The motor fixing frame further comprises a support plate, a first mounting plate and a second mounting plate, the first mounting plate and the second mounting plate are respectively arranged on opposite sides of the support plate and form a receiving recess, the motor is at least partially located in the receiving recess, and the inner sides of the first mounting plate and the second mounting plate are symmetrically provided with a plurality of boss structures, the plurality of boss structures are respectively correspondingly provided with the first fixing hole, the second fixing hole and the third fixing hole, and the first fixing hole, the second fixing hole and the third fixing hole respectively penetrate from the outer surface of the motor fixing frame to the boss surface of the boss structure.

8. The motor mount assembly of claim 7, wherein, The motor further comprises a plurality of connecting seats, the plurality of connecting seats are respectively correspondingly provided with the first fixing hole, the second fixing hole and the third fixing hole, when the motor is in the mounting position, the connecting seats abut against the boss surface, and the plurality of connecting seats are respectively provided with motor connecting holes which are in communication with the first fixing hole, the second fixing hole and the third fixing hole.

9. The motor mount assembly of any one of claims 1-8, wherein, The motor further comprises a plurality of motor connecting holes which are respectively correspondingly provided with the first fixing hole, the second fixing hole and the third fixing hole, and the center motor mounting assembly further comprises a plurality of locking assemblies, the plurality of locking assemblies are respectively correspondingly provided with the first fixing hole, the second fixing hole and the third fixing hole and are all arranged at the motor connecting holes, and each of the locking assemblies comprises a first locking member and a second locking member which are coaxial and detachably connected.

10. The center motor mounting assembly according to claim 9, wherein, axial lengths of the first locking member and the second locking member are different; and / or, the first locking member and the second locking member are threadedly connected; and / or, one ends of the first locking member and the second locking member which are close to each other are concave-convexly fitted.

11. The motor-wiring assembly of claim 9, wherein, The first fixing hole, the second fixing hole and the third fixing hole form stepped hole sections at the outer surface of the motor fixing frame, the first locking member and the second locking member each comprise: a rod body section; a head portion, the head portion is arranged at a first end of the rod body section, a radial area of the head portion is greater than a radial area of the rod body section, the head portion is received at the stepped hole section, and a second end of the rod body section forms a connecting section.

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