Electric main support damping structure

Abstract

The utility model relates to an electric main support damping structure, and relates to the field of damping technologies. The electric main support damping structure comprises a damping shaft sleeve, the damping shaft sleeve comprises an outer ring sleeve and an inner ring sleeve which are coaxially arranged, a hollow area used for being filled with damping materials is arranged between the outer ring sleeve and the inner ring sleeve, and the outer ring sleeve and the inner ring sleeve are fixedly connected through the damping materials. A mounting hole for embedding and fixing the damping shaft sleeve is formed in a motor shell of the electric kickstand, the peripheral face of the outer ring sleeve abuts against the side hole wall of the mounting hole, a gap exists between the end, deviating from the interior of the mounting hole, of the outer ring sleeve and the main frame, and a gap exists between the end, facing the interior of the mounting hole, of the inner ring sleeve and the hole wall of the mounting hole. Threads are arranged on the inner circumferential wall of the inner ring sleeve, the rod portion of the bolt penetrates through the main frame and is fixed in the inner ring sleeve, and a gap exists between the end, facing the interior of the mounting hole, of the rod portion of the bolt and the bottom wall of the mounting hole. The fastening bolt has the effects of damping, reducing noise and improving the stability of the fastening bolt.

Description

Technical Field

[0001] This application relates to the field of vibration reduction technology, and in particular to an electrically powered main support vibration reduction structure. Background Technology

[0002] Electric vehicles are widely used in daily transportation due to their lightweight and energy-efficient performance. The main support of an electric vehicle includes a main frame and an electric kickstand connected to each other, with the main frame connected to the motor housing of the electric kickstand. In existing technology, the main frame is generally fixed to the motor housing of the electric kickstand with bolts, but this direct bolt fixing method has certain drawbacks.

[0003] Because the motor of the electric kickstand vibrates when it is working, and the bolts are directly connected between the motor housing of the electric kickstand and the main frame, the vibration of the motor can be transmitted to the main frame through the bolts, resulting in greater vibration and noise of the frame, which affects the driving experience. Utility Model Content

[0004] To address the issue of excessive frame vibration and noise caused by directly fixing the main frame and electric kickstand with bolts, this application provides an electric main support shock absorption structure.

[0005] The electric main support vibration damping structure provided in this application adopts the following technical solution:

[0006] An electric main support shock absorption structure includes a shock absorption bushing. The shock absorption bushing includes an outer ring and an inner ring coaxially arranged. A hollow area for filling with shock absorption material is provided between the outer ring and the inner ring. The outer ring and the inner ring are fixedly connected by the shock absorption material filled in the hollow area between them. The motor housing of the electric kickstand has a mounting hole for the shock absorption bushing to be inserted and fixed. The outer circumferential surface of the outer ring abuts against the side wall of the mounting hole. There is a gap between the end of the outer ring facing away from the mounting hole and the main frame. There is a gap between the end of the inner ring facing the mounting hole and the wall of the mounting hole. The inner circumferential wall of the inner ring is threaded. The shank of a bolt passes through the main frame and is fixed in the inner ring, so that the main frame is fixedly connected to the motor housing of the electric kickstand. There is a gap between the end of the bolt facing the mounting hole and the bottom wall of the mounting hole.

[0007] By adopting the above technical solution, the outer ring sleeve and the inner ring sleeve are isolated by a shock-absorbing material filled between them. The outer circumferential surface of the outer ring sleeve abuts against the side wall of the mounting hole to be fixedly connected to the motor housing of the electric kickstand. A gap exists between the end of the outer ring sleeve facing away from the mounting hole and the main frame, thus isolating the outer ring sleeve from the main frame; the outer ring sleeve only abuts against the motor housing of the electric kickstand. A gap exists between the end of the inner ring sleeve facing the mounting hole and the hole wall, thus isolating the inner ring sleeve from the motor housing of the electric kickstand. Bolts used to fix the main frame and the motor housing of the electric kickstand are fixed to the inner circumferential wall of the inner ring sleeve. The shank of the bolt does not abut against the bottom wall of the mounting hole, and the head of the bolt does not abut against the outer ring sleeve; the bolt only abuts against the inner ring sleeve and the main frame, thus isolating the bolt from the motor housing of the electric kickstand. When the motor of the electric kickstand is working, the motor vibration directly affects the outer ring sleeve. Through the damping material between the outer and inner ring sleeves, the impact of motor vibration on the inner ring sleeve is reduced. Since the bolts do not abut against the motor housing of the electric kickstand, the impact of motor vibration on the bolts and the main frame that is fixed by the bolts is reduced. Furthermore, since the motor housing of the electric kickstand does not directly contact the bolts and the main frame, the noise of the motor operation is also reduced, thus achieving the effects of vibration reduction and noise reduction.

[0008] Preferably, the mounting hole is provided with a positioning shoulder, which abuts against the end face of the outer ring sleeve to prevent the end face of the inner ring sleeve from abutting against the bottom wall of the mounting hole, and there is a gap between the inner ring sleeve and the positioning shoulder.

[0009] Preferably, at least one end of the inner ring sleeve extends along the direction of the central axis of the inner ring sleeve and protrudes beyond the outer ring sleeve, so as to restrict the bolts of the motor housing connecting the main frame and the electric kickstand from abutting against the outer ring sleeve.

[0010] Preferably, the motor housing of the electric foot support is provided with a mounting base for mounting the shock-absorbing bushing, the mounting hole is opened on the mounting base, and the shock-absorbing bushing is interference-fitted with the mounting base.

[0011] Preferably, the open end of the mounting base is provided with a guide surface, and the guide surface is inclined in a direction away from the central axis of the shock-absorbing bushing.

[0012] Preferably, the outer ring sleeve has chamfers at both ends to facilitate the interference fit of the shock-absorbing bushing onto the mounting base.

[0013] Preferably, the mounting base is fixed with reinforcing ribs on its outer periphery.

[0014] Preferably, the shock-absorbing material filled in the hollow area between the outer ring and the inner ring is rubber.

[0015] In summary, this application includes at least one of the following beneficial technical effects:

[0016] The shock absorption and noise reduction effect is good, the stability of the fastening bolts is improved, the outer ring sleeve and the inner ring sleeve are isolated from each other, the outer ring sleeve is fixedly connected to the motor housing of the electric foot support, and the bolts are fixedly connected to the inner ring sleeve and do not abut against the outer ring sleeve, thereby isolating the main frame from the motor of the electric foot support, thereby reducing the impact of the motor vibration of the electric foot support on the main frame, and the shock absorption improves the stability of the bolt fastening.

[0017] Easy to install, with good limiting effect, the shock-absorbing bushing and the mounting base are interference fit, the mounting hole wall is provided with a positioning shoulder, the opening of the mounting base has a guide surface, the inner ring sleeve is provided with threads, and the end of the inner ring sleeve protrudes from the outer ring sleeve. After installing the shock-absorbing bushing onto the mounting base, tighten the bolts until they abut against the end face of the inner ring sleeve to complete the installation. Attached Figure Description

[0018] Figure 1 This is a partial structural schematic diagram of the electric main support in an embodiment of this application.

[0019] Figure 2 This is an exploded schematic diagram of the electric main support damping structure in the embodiments of this application.

[0020] Figure 3 This is a cross-sectional view of the electric main support damping structure in the embodiments of this application.

[0021] Figure 4 yes Figure 3 Enlarged diagram of point A in the middle.

[0022] Explanation of reference numerals in the attached drawings: 1. Main frame; 2. Electric foot support; 3. Shock-absorbing bushing; 31. Outer ring sleeve; 32. Inner ring sleeve; 33. Shock-absorbing cavity; 4. Fixing bolt; 21. Mounting hole; 211. Positioning shoulder; 22. Mounting seat; 221. Guide surface; 222. Reinforcing rib. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0024] This application discloses an electric main support vibration damping structure. (Refer to...) Figure 1 and Figure 2The electric main support includes a main frame 1 and an electric kickstand 2. The main frame 1 is generally fixed to the motor housing of the electric kickstand 2 by bolts. The shock absorption structure of the electric main support includes a shock absorption bushing 3, which is used to absorb vibration and reduce noise between the main frame 1 and the motor housing of the electric kickstand 2, which are fixed by bolts. The shock absorption bushing 3 is embedded and fixed to the motor housing of the electric kickstand 2. The shock absorption bushing 3 includes an outer ring 31 and an inner ring 32 arranged coaxially. There is a hollow area between the outer ring 31 and the inner ring 32. The hollow area is a shock absorption cavity 33 for filling with shock absorption material. The shock absorption material can be filled with glue, and the shock absorption material is preferably rubber. The shock absorption material filled in the shock absorption cavity 33 fixes the outer ring 31 and the inner ring 32 together and isolates them from each other.

[0025] Reference Figure 2 and Figure 3 The outer ring 31 abuts against and is fixed to the motor housing of the electric kickstand 2. A gap exists between the outer ring 31 and the main frame 1, so that the outer ring 31 only abuts against the motor housing of the electric kickstand 2 and is isolated from the main frame 1. The bolt used to fix the connection between the main frame 1 and the motor housing of the electric kickstand 2 is a fixing bolt 4. The shank of the fixing bolt 4 passes through and is fixed inside the inner ring 32. The fixing bolt 4 abuts against the inner ring 32 but not against the outer ring 31, thus isolating the main frame 1 and the fixing bolt 4 from the motor housing of the electric kickstand 2. When the motor of the electric kickstand 2 is working, since the motor housing of the electric kickstand 2 does not directly contact the fixing bolt 4 and the main frame 1, and the space between the outer ring 31 and the inner ring 32 is filled with shock-absorbing material, the impact of motor vibration on the fixing bolt 4 and the main frame 1 is reduced, and the noise of the motor operation is also reduced, thereby achieving the effect of shock absorption and noise reduction. Furthermore, shock absorption can improve the stability of the fixing bolt 4 to a certain extent.

[0026] The motor housing of the electric kickstand 2 has mounting holes 21 for installing and fixing the shock-absorbing bushing 3. The shock-absorbing bushing 3 is inserted into the mounting holes 21, and the outer circumferential surface of the outer ring 31 abuts against the side wall of the mounting hole 21. A gap exists between the inner ring 32 and the bottom wall of the mounting hole 21, so that the inner ring 32 does not abut against the motor housing of the electric kickstand 2. The inner circumferential wall of the inner ring 32 is threaded. The shank of the fixing bolt 4 passes through the main frame 1 and is fixed inside the inner ring 32. The head of the fixing bolt 4 abuts against the side of the main frame 1 away from the motor housing of the electric kickstand 2, and there is a gap between the shank of the fixing bolt 4 and the wall of the mounting hole 21, so that the fixing bolt 4 abuts only against the inner ring 32 and is isolated from the motor housing of the electric kickstand 2.

[0027] Reference Figure 3 and Figure 4A positioning shoulder 211 is provided inside the mounting hole 21. The positioning shoulder 211 is used to abut against the end face of the outer ring sleeve 31 for limiting its position. When the end face of the inserted end of the outer ring sleeve 31 abuts against the positioning shoulder 211, it indicates that the shock-absorbing sleeve 3 is installed in place. At the same time, the positioning shoulder 211 can prevent the end face of the inner ring sleeve 32 from abutting against the bottom wall of the mounting hole 21. In addition, there is a gap between the inner ring sleeve 32 and the positioning shoulder 211, so that the inner ring sleeve 32 is isolated from the side wall of the mounting hole 21. Preferably, the positioning shoulder 211 is located at the bottom wall of the mounting hole 21 and is formed by extending from the side wall of the mounting hole 21 towards the central axis of the mounting hole 21. The distance from the inner ring sleeve 32 to the outer ring sleeve 31 is greater than the width of the force-bearing surface of the positioning shoulder 211, so that when the outer ring sleeve 31 abuts against the positioning shoulder 211, the inner ring sleeve 32 and the positioning shoulder 211 do not abut against each other.

[0028] Reference Figure 2 and Figure 4 At least one end of the inner ring sleeve 32 extends along the direction of the central axis of the inner ring sleeve 32 and protrudes beyond the outer ring sleeve 31, so that the main frame 1 abuts against the inner ring sleeve 32 but not against the outer ring sleeve 31. When only one end of the inner ring sleeve 32 protrudes beyond the outer ring sleeve 31, with that end facing the main frame 1 and the fixing bolt 4 passing through the main frame 1 and fixed inside the inner ring sleeve 32, the main frame 1 abuts against the end face of the inner ring sleeve 32 without abutting against the outer ring sleeve 31. When both ends of the inner ring sleeve 32 protrude beyond the outer ring sleeve 31, when installing the shock-absorbing bushing 3, a gap must be left between the end of the inner ring sleeve 32 facing the mounting hole 21 and the bottom wall of the mounting hole 21, so that the inner ring sleeve 32 is isolated from the motor housing of the electric foot support 2. The positioning shoulder 211 facilitates the control of the gap between the inner ring sleeve 32 and the bottom wall of the mounting hole 21. When the positioning shoulder 211 is provided, its height must be greater than the length of the inner ring 32 extending beyond the outer ring 31, so as to limit the end face of the inner ring 32 from contacting the bottom wall of the mounting hole 21. In addition, a gap is left between the side circumferential surface of the protruding end of the inner ring 32 and the positioning shoulder 211 to prevent the inner ring 32 from abutting against the positioning shoulder 211.

[0029] In a preferred embodiment, the motor housing of the electric foot support 2 is further provided with a mounting base 22, and a mounting hole 21 is formed on the mounting base 22. The shock-absorbing bushing 3 is interference-fitted with the mounting base 22 to fix the shock-absorbing bushing 3 to the motor housing of the electric foot support 2. In addition, the shock-absorbing bushing 3 and the mounting base 22 can also be fixed together by means of threaded connection or other methods.

[0030] The open end of the mounting base 22 is provided with a guide surface 221, which is inclined away from the central axis of the damping bushing 3. The mounting base 22 and the damping bushing 3 are interference fit, and the size of the mounting hole 21 is slightly smaller than the size of the damping bushing 3. The guide surface 221 is provided to facilitate the smooth entry of the damping bushing 3 into the mounting hole 21. Similarly, both ends of the outer ring sleeve 31 are chamfered, which also facilitates the insertion of the damping bushing 3 into the mounting hole 21.

[0031] Reference Figure 2 The mounting base 22 is fixed with reinforcing ribs 222 on its outer periphery. The shock-absorbing bushing 3 is pressed into the mounting hole 21 by interference fit, and the fixing bolt 4 is tightened on the inner ring sleeve 32. The main frame 1 abuts against the end face of the outer ring sleeve 31 and the mounting base 22, so that the mounting base 22 bears a large pressure. The reinforcing ribs 222 are set to increase the structural strength of the mounting base 22.

[0032] The implementation principle of the electric main support shock absorption structure in this application embodiment is as follows: the outer ring sleeve 31 and the inner ring sleeve 32 are fixedly connected and isolated from each other by shock absorption material filled in the shock absorption cavity 33. The shock absorption bushing 3 is interference-fitted into the mounting hole 21, the outer peripheral surface of the outer ring sleeve 31 abuts against the mounting seat 22, and the end face of the outer ring sleeve 31 abuts against the force-bearing surface of the positioning shoulder 211, indicating that the shock absorption bushing 3 is installed in place. There is a gap between the end of the inner ring sleeve 32 facing the mounting hole 21 and the positioning shoulder 211, and there is also a gap between the end of the inner ring sleeve 32 facing the mounting hole 21 and the bottom wall of the mounting hole 21, so that the inner ring sleeve 32 is isolated from the motor housing of the electric foot support 2. The rod of the fixing bolt 4 passes through the main frame 1 and is fixed on the inner peripheral wall of the inner ring sleeve 32. The fixing bolt 4 is tightened so that the main frame 1 and the end of the inner ring sleeve 32 away from the mounting hole 21 abut against each other, and the rod of the fixing bolt 4 does not contact the bottom wall of the mounting hole 21. Therefore, the main frame 1 and the fixing bolt 4 only abut against the inner ring sleeve 32 and do not contact the outer ring sleeve 31, thereby isolating the main frame 1 and the fixing bolt 4 from the motor housing of the electric foot support 2, reducing the impact of motor vibration on the main frame 1 and the fixing bolt 4, and thus achieving shock absorption and noise reduction effects.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An electrically powered primary support shock absorbing structure, characterized by: The shock-absorbing sleeve (3) comprises an outer ring sleeve (31) and an inner ring sleeve (32) coaxially arranged, and has a hollow area between the outer ring sleeve (31) and the inner ring sleeve (32) for filling shock-absorbing material, the outer ring sleeve (31) and the inner ring sleeve (32) are fixedly connected by the shock-absorbing material filled in the hollow area therebetween, the motor housing of the electric foot prop (2) is provided with a mounting hole (21) for embedding and fixing the shock-absorbing sleeve (3), the outer circumferential surface of the outer ring sleeve (31) abuts against the side hole wall of the mounting hole (21), there is a gap between the end of the outer ring sleeve (31) away from the mounting hole (21) and the main frame (1), there is a gap between the end of the inner ring sleeve (32) toward the mounting hole (21) and the hole wall of the mounting hole (21), the inner circumferential wall of the inner ring sleeve (32) is provided with threads, the rod portion of the bolt is arranged through the main frame (1) and fixed in the inner ring sleeve (32), so that the main frame (1) and the motor housing of the electric foot prop (2) are fixedly connected, and there is a gap between the rod portion of the bolt toward the end of the mounting hole (21) and the bottom wall of the mounting hole (21).

2. The electrically powered primary support suspension structure of claim 1, wherein: The mounting hole (21) is provided with a positioning shaft shoulder (211), the positioning shaft shoulder (211) abuts against the end surface of the outer ring sleeve (31) to prevent the end surface of the inner ring sleeve (32) from abutting against the bottom wall of the mounting hole (21), and there is a gap between the inner ring sleeve (32) and the positioning shaft shoulder (211).

3. The electrically powered primary support suspension structure of claim 1 or 2, wherein: At least one end of the inner ring sleeve (32) extends along the central axis of the inner ring sleeve (32) and protrudes from the outer ring sleeve (31), so as to limit the abutment of the bolt connecting the main frame (1) and the motor housing of the electric foot prop (2) with the outer ring sleeve (31).

4. The electrically powered primary support and damping structure of claim 1, wherein: The motor housing of the electric foot prop (2) is provided with a mounting seat (22) for mounting the shock-absorbing sleeve (3), and the mounting hole (21) is arranged on the mounting seat (22), the shock-absorbing sleeve (3) is in interference fit with the mounting seat (22).

5. The electrically powered primary support and damping structure of claim 4, wherein: The opening end of the mounting seat (22) is provided with a guide surface (221) inclined away from the central axis of the shock-absorbing sleeve (3).

6. The electrically powered primary support and damping structure of claim 4, wherein: Both ends of the outer ring sleeve (31) are provided with chamfers, so as to facilitate the interference fit of the shock-absorbing sleeve (3) on the mounting seat (22).

7. The electrically powered primary support shock absorbing structure of claim 4, wherein: The mounting seat (22) is externally provided with a reinforcing rib (222).

8. The electrically powered primary support and damping structure of claim 1, wherein: The shock-absorbing material filled in the hollow area between the outer ring sleeve (31) and the inner ring sleeve (32) is rubber.

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