Novel connecting assembly for motor and rear axle of pure electric mini-truck

Abstract

The utility model relates to the technical field of pure electric mini-trucks, and particularly discloses a novel connecting assembly for a motor and a rear axle of a pure electric mini-truck, which comprises a motor suspension assembly assembled on the left side of a rear axle housing, the welding support is assembled on the right side of the rear axle housing, and the radial installation lining connecting assembly is assembled between the support and the motor suspension assembly. The lining connecting assembly is of a multi-section split type structure and comprises a lining assembly connected with a welding support on the right side of the rear axle housing and a motor fixing support connected with a motor suspension assembly on the left side of the rear axle housing. The motor suspension assembly and the motor fixing support are connected and fixed through a set of four bolts of the same specification, the motor fixing support and the lining are pre-tightened and fixed through a bolt arranged in the middle of the bearing in the radial direction, and the lining assembly and the rear axle housing right side welding support are pre-tightened and fixed through a set of two bolts of the same specification. According to the design, the sound of the shaft frequency of the motor can be greatly weakened, and the actual driving experience of a driver and passengers is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to pure electric micro truck technical field especially is related to a novel connecting assembly of pure electric micro truck motor and rear axle. BACKGROUND

[0002] The pure electric truck on the market mostly adopts the rear drive mode, and the rear axle driving structure used in cooperation is mostly the mode of direct connection of the rear axle and the motor. With the development of technology in the new era, as a kind of production tool, the real driving experience of the personnel in the truck is more and more important. The traditional engine is replaced by the motor driving, which reduces the automobile vibration and increases the comfort, and also increases the more severe test of NVH. The existing problems are: the existing motor and rear axle connection are too rigid, the sound vibration transmission stroke between the motor and the rear axle is too short, the sound is not filtered, the shaft frequency, resonance and other sounds are basically transmitted to the bridge shell vehicle body, and the special vibration abnormal sound problem is prone to occur. Therefore, in the actual engineering, it is necessary to continuously optimize the design scheme to solve the corresponding problems. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at solving the defects in the prior art, and provides a novel connecting assembly of pure electric micro truck motor and rear axle.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A novel connecting assembly of pure electric micro truck motor and rear axle, comprising a motor suspension assembly assembled on the left side of the rear axle shell;

[0006] A welding support assembled on the right side of the rear axle shell, and a radial installation bushing connecting assembly assembled between the support and the motor suspension assembly;

[0007] The bushing connecting assembly adopts a multi-section split type structure, which comprises a bushing assembly connected with the welding support on the right side of the rear axle shell, and a motor fixing support connected with the motor suspension assembly on the left side of the rear axle shell;

[0008] The motor suspension assembly and the motor fixing support are connected and fixed by using a set of four bolts of the same specification, the motor fixing support and the bushing are pre-tightened and fixed by using a bolt arranged radially in the middle of the bearing, and the bushing assembly and the welding support on the right side of the rear axle shell are pre-tightened and fixed by using a set of two bolts of the same specification.

[0009] Further, the welding support on the right side of the rear axle shell is an integral cast type cast part, and the lower surface arc-shaped bayonet of the welding support on the right side of the rear axle shell is completely matched with the surface of the bridge shell;

[0010] The upper surface of the welding support on the right side of the rear axle shell is completely matched with the bottom of the bushing installation support, and the surface has a set of two thread ports matched with the bushing installation support.

[0011] Further, the radially mounted bushing assembly comprises a radially arranged bushing piece and a bushing mounting support; the bushing mounting support is an integrally formed cast piece, both ends of the bushing mounting support are provided with two connecting feet, the middle of the connecting feet is provided with two threaded connecting openings, and the threaded connecting openings are respectively matched and connected with the right side welding brackets of the rear axle housing.

[0012] Further, the upper end circular hole of the bushing mounting support is matched and connected with the bushing, the center of the bushing is provided with corresponding threaded openings two, and the threaded openings two are matched and connected with the motor fixing support.

[0013] Further, the motor fixing support is an integrally formed cast piece, the right side center is a convex circular table, the center of the circular table is provided with threaded openings four corresponding to the threaded openings two of the center of the bushing, both sides of the circular table are respectively provided with two reinforcing ribs for strengthening the strength of the circular table, and each side of the motor fixing support is provided with two threaded openings corresponding to the four threaded openings one of the rightmost end of the motor suspension assembly.

[0014] Further, the threaded openings of the motor fixing support are surrounded by a circle, and the upper and lower edges are 2mm higher than the surrounding for facilitating the welding bolt connection.

[0015] The beneficial effects of the utility model are: 1. starting from the actual driving experience, the novel design can greatly weaken the sound of the motor shaft frequency, greatly improving the actual driving experience of the driver and passenger;

[0016] 2. the simple bushing connection design, segmented disassembly greatly reduces the installation cost and the operation and maintenance cost in the later period;

[0017] 3. the radial arrangement of the connecting bushing, that is, the noise reduction effect of the bushing on the whole axle is reserved, and the partial rigidity of the connection between the motor and the axle housing is ensured, so that the strength of the whole axle housing is reliable. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.

[0019] Figure 1 It is a whole structure schematic diagram of the utility model with a motor and a rear axle;

[0020] Figure 2 It is a rear axle fixing support structure schematic diagram of the utility model;

[0021] Figure 3 It is a torsional bushing structure schematic diagram of the utility model;

[0022] Figure 4 This is a schematic diagram of the motor fixing bracket of this utility model.

[0023] Explanation of reference numerals in the attached drawings: 1. Rear axle; 2. Rear axle motor; 3. Motor mounting bracket; 4. Right side welded bracket of rear axle housing; 5. Bushing assembly; 6. Bushing mounting bracket; 7. Bolt 1; 8. Bolt 2; 9. Bolt 3; 10. Arc-shaped bayonet; 11. Thread 1; 12. Bushing assembly; 13. Thread 2; 14. Thread 3; 15. Raised frustum; 16. Thread 4; 17. Reinforcing rib; 18. Thread 5; 19. Boss. Detailed Implementation

[0024] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] Reference Figure 1 A novel connection assembly between a motor and a rear axle of a pure electric mini-truck includes a rear axle 1 and a motor mounting bracket 3 mounted on a rear axle motor 2. The novel connection assembly is welded onto the rear axle 1. The novel connection assembly adopts a multi-segment split structure and includes the following independent components: a bushing assembly 5 connected to a welding bracket 4 on the right side of the rear axle housing, and a motor mounting bracket 3 connected to the rear axle motor 2. The welding bracket 4 on the right side of the rear axle housing is welded onto the rear axle 1 and its upper end is connected to the bushing assembly 5. There is a set of symmetrical bolts 7 at the connection between the welding bracket 4 on the right side of the rear axle housing and the bushing mounting bracket 6. The left side of the bushing assembly 5 is connected to the right side of the motor mounting bracket 3 by bolts 9. The motor mounting bracket 3 and the rear axle motor 2 are connected and fixed using a set of four bolts of the same specification 8.

[0026] Furthermore, such as Figure 2 As shown, the motor mounting bracket 3 is a one-piece casting with a raised frustum 15 in the middle. At the center of the frustum is a motor mounting bracket threaded opening 16. On either side of the frustum are two frustums 19 and reinforcing ribs 17. On each side of the motor mounting bracket 3 are two motor mounting bracket threaded openings 18 that correspond one-to-one with the four bolt holes on the rear axle motor 2. Around the threaded openings 18 of the motor mounting bracket 3, there are bosses 19 on both the top and bottom edges that are 2mm higher than the surrounding area for easy welding bolt connections. This design of the motor mounting bracket 3 saves raw materials while ensuring excellent structural strength and facilitating subsequent assembly and disassembly.

[0027] Furthermore, such as Figure 3As shown, the right side welding bracket 4 of the rear axle housing is machined into an integral cast notch-shaped casting. The arc-shaped bayonet 10 on the lower surface of the right side welding bracket 4 of the rear axle housing is completely fitted with the surface of the axle housing 1. The upper surface of the right side welding bracket 4 of the rear axle housing is completely fitted with the bottom of the bushing mounting bracket 6, and the upper surface of the right side welding bracket 4 of the rear axle housing has a set of two threaded openings 12 that match the bushing mounting bracket 6.

[0028] Furthermore, such as Figure 4 As shown, the bushing assembly 5 includes a bushing kit 12 and a bushing mounting bracket 6. The bushing kit 12 is fastened to the round hole of the bushing mounting bracket 6. The bushing mounting bracket 6 has a set of two threaded openings 14 at both ends, which correspond to another set of threaded openings 11 in position. The bushing kit 12 has a bushing threaded opening 2 at the center, which corresponds to another motor mounting bracket threaded opening 16 on the right side of the motor mounting bracket 3.

[0029] In use: First, attach and weld the arc-shaped bayonet 10 of the welding bracket 4 on the right side of the rear axle housing to the surface of the rear axle housing 1. Then, fix the bushing assembly 5 and the welding bracket 4 on the right side of the rear axle housing with connecting bolts. Fix the bushing assembly 5 and the motor mounting bracket 3 with connecting bolts. Finally, connect and fix the motor mounting bracket 3 to the rear axle motor 2 with bolts. This connection assembly design, acting as a bridge between the motor and the axle housing, effectively reduces shaft frequency noise and gear squealing felt in the passenger compartment, greatly improving the passenger environment. The axial arrangement of the bushing also ensures the rigidity of the connection between the motor and the axle housing, preventing the axle housing from being stressed only at one end and ensuring the overall strength and reliability of the axle housing.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A novel connection assembly between a motor and a rear axle of a pure electric mini-truck, comprising a motor mounting assembly mounted on the left side of the rear axle housing; The welded bracket is mounted on the right side of the rear axle housing, and the radial mounting bushing connection assembly is mounted between the bracket and the motor mount assembly. Its features are, The bushing connection assembly adopts a multi-segment split structure, which includes a bushing assembly connected to the welding bracket on the right side of the rear axle housing and a motor fixing bracket connected to the motor suspension assembly on the left side of the rear axle housing. The motor mounting assembly and the motor mounting bracket are connected and fixed using a set of four bolts of the same specification. The motor mounting bracket and the bushing are pre-tightened and fixed by a bolt in the middle of the radially arranged bearing. The bushing assembly and the welding bracket on the right side of the rear axle housing are pre-tightened and fixed by a set of two bolts of the same specification.

2. The novel connection assembly between the motor and the rear axle of the pure electric mini-truck according to claim 1, characterized in that, The welding bracket on the right side of the rear axle housing is an integrally cast notch-shaped casting, and the arc-shaped notch on the lower surface of the welding bracket on the right side of the rear axle housing is completely fitted to the surface of the axle housing. The upper surface of the welding bracket on the right side of the rear axle housing is completely fitted with the bottom of the bushing mounting bracket, and the surface has a set of two threaded holes that match the bushing mounting bracket.

3. The novel connection assembly between the motor and the rear axle of the pure electric mini-truck according to claim 1, characterized in that, The radially mounted bushing assembly includes a radially arranged bushing assembly and a bushing mounting bracket; the bushing mounting bracket is an integrally formed casting, with two connecting feet at both ends, and two threaded connection ports in the middle of the connecting feet, which are respectively paired and connected to the welding bracket on the right side of the rear axle housing.

4. The novel connection assembly between the motor and the rear axle of the pure electric mini-truck according to claim 3, characterized in that, The bushing mounting bracket has a hole at its upper end that mates with the bushing. The bushing has a corresponding threaded opening at its center, which mates with the motor mounting bracket and is bolted together.

5. The novel connection assembly between the motor and the rear axle of the pure electric mini-truck according to claim 4, characterized in that, The motor mounting bracket is an integral casting. The center of the right side is a raised truncated cone. The center of the truncated cone has a threaded port four, which corresponds to the threaded port two in the center of the bushing. On both sides of the truncated cone are two reinforcing ribs to strengthen the truncated cone. There are two threaded ports on each side of the motor mounting bracket, which correspond one-to-one with the four threaded ports at the rightmost end of the motor suspension assembly.

6. The novel connection assembly between the motor and the rear axle of the pure electric mini-truck according to claim 5, characterized in that, The area around the threaded opening of the motor mounting bracket is raised 2mm higher on both the top and bottom sides than the surrounding area to facilitate welding bolt connections.

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