Motor driving structure

Abstract

The utility model discloses a motor driving structure, comprising a motor body and a motor driving shaft, the motor driving shaft is installed on the motor body, and the motor body is configured to drive the motor driving shaft to rotate; a first through hole is formed in the swing arm, the first through hole is matched with the motor driving shaft, and one end of the motor driving shaft penetrates through the first through hole to be connected with the swing arm; a positioning groove is further formed in the positioning block and the swing arm, and the positioning groove is communicated with the first through hole, so that part of the motor driving shaft is exposed in the positioning groove; the positioning block can be embedded into the positioning groove and tightly abuts against part of the motor driving shaft so that the swing arm can be fixed to one end of the motor driving shaft, and the swing arm can swing along with the motor driving shaft. According to the utility model, through the close fit of the positioning block, the positioning groove and the motor driving shaft, the gap between the motor driving shaft and the swing arm is effectively eliminated, and the relative movement caused by the gap is avoided, so that the stability and the precision in the transmission process are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of pedal swing arm motor drive, in particular to a motor drive structure. Background Art

[0002] In some vehicle models such as SUVs, due to their higher chassis than sedans, it is not conducive to the driver and passengers getting on and off the vehicle. Therefore, these vehicle models generally are equipped with pedals to assist the driver and passengers getting on and off the vehicle. The pedals are generally divided into fixed pedals and electric pedals. The fixed pedals are fixedly installed on the vehicle body; the electric pedals usually use a motor to drive the swing arm to swing to drive the pedal body to move relative to the vehicle body.

[0003] In the traditional connection structure between the motor and the swing arm, the motor shaft is generally D-shaped or polygonal. Correspondingly, the swing arm hole also needs to be machined into D-shaped or polygonal, and the torque is transmitted through shape matching, so that the swing arm can be driven to rotate when the motor shaft rotates.

[0004] The connection between the motor shaft and the swing arm usually adopts clearance fit or interference fit. When using clearance fit, there is a certain gap between the motor shaft and the swing arm hole. Although it is convenient for assembly, the existence of the gap makes it easy for relative movement to occur between the motor shaft and the swing arm, resulting in unstable transmission. And due to vibration and impact, it is easy to exacerbate the wear of the motor shaft and shorten the service life. When using interference fit, the diameter of the motor shaft is slightly larger than the diameter of the swing arm hole, and a tight connection is achieved through methods such as press-fitting. Although this method can effectively reduce relative movement, the assembly process is complex and costly, and has extremely high requirements for machining accuracy. In addition, interference fit may also lead to excessive assembly stress, affecting the mechanical properties of the parts, and it is difficult to disassemble during motor maintenance or replacement, increasing the maintenance cost. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a solution to the problem that the motor shaft and the swing arm with traditional clearance fit are prone to relative movement, resulting in unstable transmission.

[0006] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0007] A motor drive structure includes: a motor body and a motor drive shaft, the motor drive shaft is installed on the motor body, and the motor body is configured to drive the motor drive shaft to rotate; a swing arm, a first through hole is formed on the swing arm, the first through hole is adapted to the motor drive shaft, and one end of the motor drive shaft passes through the first through hole and is connected to the swing arm; a positioning block, a positioning groove is further formed on the swing arm, the positioning groove is communicated with the first through hole, so that part of the motor drive shaft is exposed in the positioning groove; the positioning block can be embedded in the positioning groove and is in close contact with part of the motor drive shaft to fix the swing arm at one end of the motor drive shaft, and the swing arm can swing along with the motor drive shaft.

[0008] According to the above means, the utility model effectively eliminates the gap between the motor drive shaft and the swing arm through the close cooperation of the positioning block, the positioning groove and the motor drive shaft, avoids the relative movement caused by the gap, and thus ensures the stability and accuracy of the transmission process. The positioning block is embedded in the positioning groove and is in close contact with part of the motor drive shaft, reducing the loss of energy during the transmission process, improving the transmission efficiency, and enabling the power output by the motor body to be more efficiently converted into the swing kinetic energy of the swing arm. At the same time, the wear and vibration caused by the gap are reduced, the service life of components such as the motor, the motor drive shaft and the swing arm is extended, and the maintenance cost is reduced.

[0009] Further, one end of the motor drive shaft and the swing arm have a clearance fit structure.

[0010] According to the above means, the clearance fit enables the motor drive shaft to more easily pass through the first through hole of the swing arm, thus simplifying the assembly process and improving the production efficiency. The utility model effectively eliminates the gap between the motor drive shaft and the swing arm through the close cooperation of the positioning block, the positioning groove and the motor drive shaft, avoids the relative movement caused by the gap, and thus ensures the stability and accuracy of the transmission process.

[0011] Further, the motor drive shaft is of a cylindrical structure, and the first through hole is a round hole.

[0012] According to the above means, the motor drive shaft with a cylindrical structure and the first through hole with a round hole structure have high versatility, can be applied to a variety of different motor and swing arm combinations, are convenient for standardized production and interchangeable use. At the same time, since the processing of the cylinder and the round hole is relatively simple, the production cost can be significantly reduced and the production efficiency can be improved.

[0013] Further, at least part of the cross-section of the motor drive shaft is of a D-shaped structure, and the part of the motor drive shaft with a D-shaped cross-section is exposed in the positioning groove.

[0014] According to the above means, the part of the motor drive shaft with a D-shaped cross-section can abut against the positioning block, so that the motor drive shaft can stably drive the swing arm to move through the positioning block when transmitting torque.

[0015] Further, a first plane is formed on the part of the motor drive shaft with a D-shaped cross-section, and a second plane is formed on the positioning block. The first plane abuts against the second plane so that the positioning block abuts against the motor drive shaft.

[0016] According to the above means, the abutment of the first plane and the second plane ensures the precise position of the motor drive shaft in the transmission system, eliminates the problem of inaccurate positioning caused by gaps or looseness, and improves the overall precision of the transmission system. The design of the plane abutment can maintain a tight connection between the motor drive shaft and the positioning block under various working conditions, preventing loosening or falling off caused by vibration or impact.

[0017] During the installation process, only need to align the D-shaped part on the motor drive shaft with the positioning block and ensure that the two planes are in tight abutment, which simplifies the installation steps and reduces the requirements for installation precision.

[0018] Further, the positioning block is of a wedge-shaped structure so that the positioning block can be embedded in the positioning groove and abut tightly against the motor drive shaft.

[0019] According to the above means, the wedge-shaped positioning block can be more easily embedded in the positioning groove. As the positioning block is gradually pushed into the groove, its wedge-shaped design will guide it to automatically align and fit tightly on the motor drive shaft, thus simplifying the installation process. Once the positioning block is completely embedded in the positioning groove and abuts tightly against the motor drive shaft, its wedge-shaped structure will provide additional locking force to prevent loosening caused by vibration or impact and enhance the connection stability between the motor drive shaft and the swing arm. Due to the tight abutment between the positioning block and the motor drive shaft and the additional locking force provided by the wedge-shaped structure, the load-bearing capacity of the transmission system is improved. When subjected to a large load, the positioning block can effectively disperse the force and protect the motor drive shaft and the swing arm from damage.

[0020] Further, a first limiting block and a second limiting block are also formed on the swing arm. The first limiting block and the second limiting block are distributed along the axial direction of the motor drive shaft and are respectively located on both sides of the positioning groove; the first limiting block and the second limiting block can respectively abut against both sides of the positioning block to prevent the positioning block from shaking.

[0021] According to the above means, the design of the first limiting block and the second limiting block provides additional support and limitation for the positioning block, and can ensure that the positioning block will not deviate from its predetermined position when subjected to external forces, thus improving the overall stability of the drive structure.

[0022] Further, a first limiting portion and a second limiting portion are formed on the motor drive shaft. The first limiting portion and the second limiting portion are located on both sides of the first plane, and the first limiting portion and the second limiting portion can abut against the positioning block to prevent one end of the motor drive shaft from disengaging from the swing arm.

[0023] According to the above technical means, the design of the first limiting portion and the second limiting portion provides additional safety protection for the connection between the motor drive shaft and the swing arm. It can prevent the motor drive shaft from disengaging from the swing arm when subjected to external forces, thereby avoiding equipment failures or accidents caused by connection failures. The presence of the first limiting portion and the second limiting portion ensures the stability of the motor drive shaft during the transmission process. They limit the axial movement range of the motor drive shaft, enabling it to transmit power and motion more accurately.

[0024] Further, a fixing member is further included, and the positioning block is fixedly connected to the positioning groove through the fixing member.

[0025] According to the above means, the fixing member tightly connects the positioning block and the swing arm by providing additional fastening force, not only enhancing the stability of the positioning block but also improving the reliability of the entire transmission system. Under the action of long-term operation or external factors such as vibration and impact, traditional connection methods may become loose. The design of the fixing member can effectively prevent this situation from occurring and ensure that the positioning block always remains in the correct position.

[0026] Further, the fixing member is a screw. A threaded hole is formed on the positioning block, and a second through hole is formed on the swing arm. The second through hole is located within the positioning groove; the threaded hole corresponds to the second through hole, and the screw can pass through the second through hole and be threadedly connected to the threaded hole to fix the positioning block within the positioning groove.

[0027] According to the above technical means, the present utility model fixes the positioning block within the positioning groove through the screw, significantly enhancing the connection stability between the motor drive shaft and the swing arm and preventing the positioning block from loosening or falling off during the transmission process. When it is necessary to replace or adjust the positioning block, the screw can be loosened to easily remove the positioning block.

[0028] The beneficial effects achieved by the present utility model:

[0029] Through the tight fit of the positioning block with the positioning groove and the motor drive shaft, the utility model effectively eliminates the gap between the motor drive shaft and the swing arm, avoids the relative movement caused by the gap, and thus ensures the stability and accuracy of the transmission process. The positioning block is embedded in the positioning groove and tightly abuts against part of the motor drive shaft, reducing the loss of energy during the transmission process, improving the transmission efficiency, and enabling the power output by the motor body to be more efficiently converted into the swing kinetic energy of the swing arm. At the same time, the wear and vibration caused by the gap are reduced, the service life of components such as the motor, the motor drive shaft, and the swing arm is extended, and the maintenance cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is an exploded schematic view of the overall structure of the utility model;

[0031] Figure 2 is a schematic view of the assembled structure of the utility model;

[0032] Figure 3 is Figure 2 a schematic view of the sectional structure taken along the line K-K of

[0033] Figure 4 is a schematic view of the swing arm structure of the utility model;

[0034] Figure 5 is a schematic view of the positioning block structure of the utility model;

[0035] Figure 6 is a schematic view of the fixing member structure of the utility model.

[0036] Among them, 1 - motor body;

[0037] 2 - motor drive shaft, 21 - first plane, 22 - first limiting portion, 23 - second limiting portion;

[0038] 3 - swing arm, 31 - first through hole, 32 - positioning groove, 33 - second through hole, 34 - first limiting block, 35 - second limiting block;

[0039] 4 - positioning block, 41 - second plane, 42 - threaded hole;

[0040] 5 - fixing member.

[0041] The drawings are only for illustrative purposes and should not be construed as limitations on this patent; for better illustration of this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual size of the product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted; the same or similar reference numerals correspond to the same or similar components; the terms describing the positional relationship in the drawings are only for illustrative purposes and should not be construed as limitations on this patent. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] It should be noted that, without conflict, the embodiments in this application and the technical features in the embodiments can be combined with each other. The detailed descriptions in the specific embodiments should be understood as explanatory descriptions of the purpose of this application and should not be regarded as improper restrictions on this application.

[0043] To make the purpose, technical solutions, and advantages of the embodiments of this application clearer, the following will further describe the specific technical solutions of this application in detail with reference to the accompanying drawings in the embodiments of this application. The following embodiments are used to illustrate this application but are not used to limit the scope of this application.

[0044] In the embodiments of this application, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of this application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0045] In the embodiments of this application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or integrated; it can be directly connected or indirectly connected through an intermediate medium.

[0046] In the embodiments of this application, the terms "include", "comprise", or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device including a series of elements not only includes those elements but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article, or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article, or device including such element.

[0047] The following will introduce and describe the technical solutions of this embodiment in detail with reference to specific accompanying drawings.

[0048] Embodiment 1

[0049] As Figure 1As shown in the figure, this embodiment proposes a motor drive structure, including: a motor body 1 and a motor drive shaft 2. The motor drive shaft 2 is installed on the motor body 1, and the motor body 1 is configured to drive the motor drive shaft 2 to rotate; a swing arm 3, on which a first through hole 31 is formed. The first through hole 31 is adapted to the motor drive shaft 2, and one end of the motor drive shaft 2 passes through the first through hole 31 and is connected to the swing arm 3; a positioning block 4, a positioning groove 32 is also formed on the swing arm 3, and the positioning groove 32 communicates with the first through hole 31, so that part of the motor drive shaft 2 is exposed in the positioning groove 32; the positioning block 4 can be embedded in the positioning groove 32 and is in close contact with part of the motor drive shaft 2 to fix the swing arm 3 to one end of the motor drive shaft 2, and the swing arm 3 can swing along with the motor drive shaft 2.

[0050] During the specific use process, first, one end of the motor drive shaft 2 is passed through the first through hole 31 on the swing arm 3 to ensure good alignment between the shaft and the hole. Subsequently, the positioning block 4 is embedded in the positioning groove 32 on the swing arm 3 until the positioning block 4 is in close contact with the part of the motor drive shaft 2 exposed in the positioning groove 32 to ensure a gapless connection between the motor drive shaft 2 and the swing arm 3. When the motor body 1 starts and drives the motor drive shaft 2 to rotate, due to the fastening effect of the positioning block 4, the swing arm 3 is firmly fixed to one end of the motor drive shaft 2 and swings synchronously therewith. When it is necessary to adjust the position of the swing arm 3 or perform maintenance, the positioning block 4 can be easily disassembled to check, clean or replace the connection part between the motor drive shaft 2 and the swing arm 3. After completion, the positioning block 4 is reinstalled to restore the stable transmission state of the system.

[0051] In this embodiment, through the close cooperation of the positioning block 4 with the positioning groove 32 and the motor drive shaft 2, the gap between the motor drive shaft 2 and the swing arm 3 is effectively eliminated, avoiding relative movement caused by the gap, thereby ensuring the stability and accuracy of the transmission process. The positioning block 4 is embedded in the positioning groove 32 and is in close contact with part of the motor drive shaft 2, reducing the loss of energy during the transmission process, improving the transmission efficiency, and enabling the power output by the motor body 1 to be more efficiently converted into the swing kinetic energy of the swing arm. At the same time, the wear and vibration caused by the gap are reduced, the service life of components such as the motor, the motor drive shaft and the swing arm is extended, and the maintenance cost is reduced.

[0052] In this embodiment, one end of the motor drive shaft 2 and the swing arm 3 have a clearance fit structure.

[0053] The clearance fit enables the motor drive shaft 2 to more easily pass through the first through hole 31 of the swing arm 3, thus simplifying the assembly process and improving the production efficiency. Through the close cooperation of the positioning block 4 with the positioning groove 32 and the motor drive shaft 2, the gap between the motor drive shaft 2 and the swing arm 3 is effectively eliminated, avoiding relative movement caused by the gap, thereby ensuring the stability and accuracy of the transmission process.

[0054] Such asFigure 1 and Figure 2 As shown in Figure 2 , the motor drive shaft 2 is of a cylindrical structure, and the first through hole 31 is a circular hole. The cylindrical motor drive shaft 2 and the circular hole structure of the first through hole 31 have high versatility, can be applicable to a variety of different motors and swing arms combinations, facilitating standardized production and interchangeable use. At the same time, since the machining of the cylinder and the circular hole is relatively simple, the production cost can be significantly reduced and the production efficiency can be improved.

[0055] As Figure 1 and Figure 3 shown in Figure 3 , at least a part of the cross-section of the motor drive shaft 2 is of a D-shaped structure, and the part of the motor drive shaft 2 with a D-shaped cross-section is exposed in the positioning groove 32. The part of the motor drive shaft 2 with a D-shaped cross-section can abut against the positioning block 4, and thus the motor drive shaft 2 can stably drive the swing arm 3 through the positioning block 4 when transmitting torque.

[0056] As Figure 1 , Figure 3 and Figure 5 shown in Figure 5 , a first plane 21 is formed on the part of the motor drive shaft 2 with a D-shaped cross-section, and a second plane 41 is formed on the positioning block 4. The first plane 21 abuts against the second plane 41 so that the positioning block 4 abuts against the motor drive shaft 2.

[0057] The abutment of the first plane 21 and the second plane 41 ensures the accurate position of the motor drive shaft 2 in the transmission system, eliminates the problem of inaccurate positioning caused by gaps or looseness, and improves the overall accuracy of the transmission system. The design of plane abutment can maintain a tight connection between the motor drive shaft 2 and the positioning block 4 under various working conditions, preventing looseness or detachment caused by vibration or impact.

[0058] During the installation process, only need to align the D-shaped part on the motor drive shaft 2 with the positioning block 4 and ensure that the two planes are in tight abutment, which simplifies the installation steps and reduces the requirements for installation accuracy.

[0059] As Figure 1 and Figure 5 shown in Figure 5 , the positioning block 4 is of a wedge-shaped structure so that the positioning block 4 can be embedded in the positioning groove 32 and abut tightly against the motor drive shaft 2.

[0060] The positioning block 4 with a wedge-shaped structure can be more easily inserted into the positioning groove 32. As the positioning block 4 is gradually pushed into the groove, its wedge-shaped design will guide it to automatically align and fit tightly on the motor drive shaft 2, thus simplifying the installation process. Once the positioning block 4 is completely inserted into the positioning groove 32 and abuts tightly against the motor drive shaft 2, its wedge-shaped structure will provide additional locking force to prevent loosening caused by vibration or impact, enhancing the connection stability between the motor drive shaft 2 and the swing arm 3. Due to the tight abutment between the positioning block 4 and the motor drive shaft 2 and the additional locking force provided by the wedge-shaped structure, the load-bearing capacity of the transmission system is improved. When subjected to a large load, the positioning block can effectively disperse the force and protect the motor drive shaft 2 and the swing arm 3 from damage.

[0061] As Figure 1 and Figure 4 shown, a first limiting block 34 and a second limiting block 35 are also formed on the swing arm 3. The first limiting block 34 and the second limiting block 35 are distributed along the axial direction of the motor drive shaft 2 and are located on both sides of the positioning groove 32 respectively; the first limiting block 34 and the second limiting block 35 can respectively abut against both sides of the positioning block 4 to prevent the positioning block 4 from shaking.

[0062] The design of the first limiting block 34 and the second limiting block 35 provides additional support and limitation for the positioning block 4, which can ensure that the positioning block 4 will not deviate from its predetermined position when subjected to external forces, thus improving the overall stability of the drive structure.

[0063] As Figure 1 shown, a first limiting portion 22 and a second limiting portion 23 are formed on the motor drive shaft 2. The first limiting portion and the second limiting portion 23 are located on both sides of the first plane 21, and the first limiting portion 22 and the second limiting portion 23 can abut against the positioning block 4 to prevent one end of the motor drive shaft 2 from disengaging from the swing arm 3.

[0064] The design of the first limiting portion 22 and the second limiting portion 23 provides additional safety protection for the connection between the motor drive shaft 2 and the swing arm 3. It can prevent the motor drive shaft 2 from disengaging from the swing arm 3 when subjected to external forces, thus avoiding equipment failures or accidents caused by connection failures. The existence of the first limiting portion 22 and the second limiting portion 23 ensures the stability of the motor drive shaft 2 during the transmission process. They limit the axial movement range of the motor drive shaft 2, enabling it to transmit power and motion more accurately.

[0065] As Figure 1 、 Figure 3 and Figure 6 shown, it further includes a fixing member 5. The positioning block 4 is fixedly connected to the positioning groove 32 through the fixing member 5.

[0066] The fixing member 5 tightly connects the positioning block 4 and the swing arm 3 by providing additional fastening force, which not only enhances the stability of the positioning block but also improves the reliability of the entire transmission system. Under long-term operation or the action of external factors such as vibration and shock, the traditional connection method may become loose. However, the design of the fixing member 5 can effectively prevent this situation from occurring and ensure that the positioning block 4 always remains in the correct position.

[0067] As Figures 4 - 6 shown, the fixing member 5 is a screw. A threaded hole 42 is formed on the positioning block 4, and a second through hole 33 is formed on the swing arm 3. The second through hole 33 is located within the positioning groove 32; the threaded hole 42 corresponds to the second through hole 33, and the screw can pass through the second through hole 33 and be threadedly connected to the threaded hole 42 to fix the positioning block 4 within the positioning groove 32.

[0068] Specifically, threaded holes 42 are designed on the positioning block 4, and these threads are used to match the threaded part of the screw (fixing member 5). The position and number of the threaded holes should be determined according to the size and shape of the positioning block 4 and the required fixing strength.

[0069] Second through holes 33 are designed on the swing arm 3 at corresponding positions within the positioning groove 32. These through holes are used to allow the screw to pass through and reach the threaded holes 42 on the positioning block 4. The number and position of the second through holes 33 should correspond to the threaded holes on the positioning block.

[0070] The screw (fixing member 5) passes through the second through hole 33 and is threadedly connected to the threaded hole 42 on the positioning block, thereby firmly fixing the positioning block within the positioning groove 32. During the installation process, it is necessary to ensure that the screw is tightened to an appropriate degree to provide sufficient clamping force without damaging the components.

[0071] In this embodiment, the positioning block 4 is fixed within the positioning groove 32 by a screw, significantly enhancing the connection stability between the motor drive shaft 2 and the swing arm 3 and preventing the positioning block 4 from loosening or falling off during the transmission process. When it is necessary to replace or adjust the positioning block 4, simply loosen the screw to easily remove the positioning block 4.

[0072] In this embodiment, the screw connection can adjust the magnitude of the clamping force as needed to adapt to different working conditions and load requirements. In addition, by selecting appropriate screw materials and specifications, the connection strength and durability can be further improved.

[0073] The serial numbers of the embodiments of the present application above are only for description and do not represent the superiority or inferiority of the embodiments. The above are only the preferred embodiments of the present application. Therefore, the patent scope of the present application is not limited thereby. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A motor drive structure, characterized in that, Including: A motor body (1) and a motor drive shaft (2), the motor drive shaft (2) is installed on the motor body (1), and the motor body (1) is configured to drive the motor drive shaft (2) to rotate; A swing arm (3), a first through hole (31) is formed on the swing arm (3), the first through hole (31) is adapted to the motor drive shaft (2), and one end of the motor drive shaft (2) passes through the first through hole (31) and is connected to the swing arm (3); A positioning block (4), a positioning groove (32) is further formed on the swing arm (3), the positioning groove (32) communicates with the first through hole (31), so that a part of the motor drive shaft (2) is exposed in the positioning groove (32); the positioning block (4) can be embedded in the positioning groove (32) and is in close contact with a part of the motor drive shaft (2) to fix the swing arm (3) at one end of the motor drive shaft (2), and the swing arm (3) can swing along with the motor drive shaft (2).

2. The motor drive structure according to claim 1, characterized in that, One end of the motor drive shaft (2) and the swing arm (3) are of a clearance fit structure.

3. The motor drive structure according to claim 2, wherein The motor drive shaft (2) is of a cylindrical structure, and the first through hole (31) is a circular hole.

4. The motor drive structure according to claim 3, characterized in that, At least a part of the cross section of the motor drive shaft (2) is of a D-shaped structure, and the part of the motor drive shaft (2) with a D-shaped cross section is exposed in the positioning groove (32).

5. The motor drive structure according to claim 4, characterized in that, A first plane (21) is formed on the part of the motor drive shaft (2) with a D-shaped cross section, a second plane (41) is formed on the positioning block (4), and the first plane (21) abuts against the second plane (41) so that the positioning block (4) abuts against the motor drive shaft (2).

6. The motor drive structure according to claim 5, wherein The positioning block (4) is of a wedge-shaped structure so that the positioning block (4) can be embedded in the positioning groove (32) and is in close contact with the motor drive shaft (2).

7. The motor drive structure according to claim 6, characterized in that, A first limiting block (34) and a second limiting block (35) are further formed on the swing arm (3), the first limiting block (34) and the second limiting block (35) are distributed along the axial direction of the motor drive shaft (2) and are respectively located on both sides of the positioning groove (32); the first limiting block (34) and the second limiting block (35) can respectively abut against both sides of the positioning block (4) to prevent the positioning block (4) from shaking.

8. An electric motor drive structure according to claim 5 or 7, characterized in that, A first limiting portion (22) and a second limiting portion (23) are formed on the motor drive shaft (2), the first limiting portion and the second limiting portion (23) are located on both sides of the first plane (21), and the first limiting portion (22) and the second limiting portion (23) can abut against the positioning block (4) to prevent one end of the motor drive shaft (2) from detaching from the swing arm (3).

9. A motor drive structure according to claim 1, characterized in that, It further includes a fixing member (5), and the positioning block (4) is fixedly connected to the positioning groove (32) through the fixing member (5).

10. A motor drive structure according to claim 9, characterized in that, The fixing member (5) is a screw. A threaded hole (42) is formed in the positioning block (4), and a second through hole (33) is formed in the swing arm (3). The second through hole (33) is located in the positioning groove (32). The threaded hole (42) corresponds to the second through hole (33). The screw can pass through the second through hole (33) and be threadedly connected to the threaded hole (42) to fix the positioning block (4) in the positioning groove (32).

Images