阅读说明：本技术 一种微循环车驱动后桥及复合悬架结构 (Microcirculation car drive rear axle and compound suspension structure ) 是由 饶嘉彬 何名基 周大坤 黄焕超 陆匡伟 孙超 黄在璐 黄育荣 蒙仕 王足生 林大 于 2021-09-18 设计创作，主要内容包括：本发明涉及一种微循环车驱动后桥及复合悬架结构,桥壳总成包括圆管后轴总成和支撑架,左支撑架和右支撑架分别设置于圆管后轴总成两端；整桥复合悬架结构包括平置导向臂总成、减振器总成、气囊总成、横向稳定杆和吊杆总成,平置导向臂总成设置于支撑架上,气囊总成设置于平置导向臂总成上,横向稳定杆设置于圆管后轴总成上,吊杆总成设置于横向稳定杆上；集中式动力驱动模块总成包括电机、减速器和传动轴,减速器与电机连接,传动轴一端与减速器连接,传动轴另一端与轮毂连接,整个集中式动力驱动模块总成通过螺栓紧固于整车底盘车架上。通过偏置桥壳总成,实现结构简单紧凑,提高整车的操控稳定性,加大底盘空间布置,满足动力模块总成安装布置。(The invention relates to a drive rear axle and a composite suspension structure of a microcirculation vehicle.A bridge shell assembly comprises a circular tube rear axle assembly and a support frame, wherein a left support frame and a right support frame are respectively arranged at two ends of the circular tube rear axle assembly; the whole bridge composite suspension structure comprises a horizontally-arranged guide arm assembly, a shock absorber assembly, an air bag assembly, a transverse stabilizer bar and a suspender assembly, wherein the horizontally-arranged guide arm assembly is arranged on a support frame; the centralized power driving module assembly comprises a motor, a speed reducer and a transmission shaft, wherein the speed reducer is connected with the motor, one end of the transmission shaft is connected with the speed reducer, the other end of the transmission shaft is connected with a wheel hub, and the whole centralized power driving module assembly is fastened on a whole chassis frame through a bolt. Through biasing axle housing assembly, realize simple structure compactness, improve the stability of controlling of whole car, increase chassis spatial arrangement, satisfy the installation of power module assembly and arrange.)

1. The utility model provides a microcirculation car drive rear axle and compound suspension structure, axle housing assembly (1), centralized power drive module assembly (2), whole bridge composite suspension structure (3) and electron parking hydraulic disc braking system (4), whole bridge composite suspension structure (3) set up on axle housing assembly (1), its characterized in that: the axle housing assembly (1) comprises a circular tube rear axle assembly (101) and a support frame, the support frame comprises a left support frame (104) and a right support frame (105), and the left support frame (104) and the right support frame (105) are respectively arranged at two ends of the circular tube rear axle assembly (101); the whole-bridge composite suspension structure (3) comprises a horizontally-arranged guide arm assembly (302), a shock absorber assembly (303), an air bag assembly (306), a transverse stabilizer bar (307) and a suspender assembly (3012), wherein the horizontally-arranged guide arm assembly (302) is arranged on a support frame, the air bag assembly (306) is arranged on the horizontally-arranged guide arm assembly (302), the transverse stabilizer bar (307) is arranged on a circular tube rear shaft assembly (101), and the suspender assembly (3012) is arranged on the transverse stabilizer bar (307); the centralized power driving module assembly (2) comprises a motor (201), a speed reducer (202) and a transmission shaft (203), wherein the speed reducer (202) is connected with the motor (201), one end of the transmission shaft (203) is connected with the speed reducer (202), the other end of the transmission shaft (203) is connected with a wheel hub, and the whole centralized power driving module assembly is fastened on a whole vehicle chassis frame through bolts; the electronic parking hydraulic disc type brake system (4) comprises an electronic parking controller (401) and a disc type hydraulic brake (5), wherein the disc type hydraulic brake (5) is connected with the electronic parking controller (401).

2. The microcirculation vehicle drive rear axle and composite suspension structure of claim 1, wherein: a shock absorber support (103) is arranged on a support frame of the axle housing assembly (1), and the shock absorber assembly (303) is arranged on the shock absorber support (103).

3. The microcirculation vehicle drive rear axle and composite suspension structure of claim 1, wherein: a right supporting frame (105) and a left supporting frame (104) are fastened on the circular tube rear shaft assembly (101) through flange bolts (102) respectively, and an axle tube (106) is fastened on the right supporting frame (105) and the left supporting frame (104) respectively through inner hexagon screws (107).

4. The microcirculation vehicle drive rear axle and composite suspension structure of claim 1, wherein: before assembly, a motor (201) and a speed reducer (202) are assembled under a line to form a small assembly, after the small assembly is assembled on a vehicle frame, one end of a transmission shaft (203) is fastened on a transmission shaft spline end of a hub assembly by a transmission shaft wheel end fastening bolt (206), and a flange at the other end of the transmission shaft is fastened on the speed reducer (202) through an inner hexagon screw (204) and a toothed locking washer (205).

5. The microcirculation vehicle drive rear axle and composite suspension structure of claim 1, wherein: the horizontally-arranged guide arm assembly (302) is stably placed on a support frame, a riding bolt (3013) penetrates through a plate spring mounting hole of the support frame and then is fastened with a nut (3015), and a bolt (301) penetrates through a unthreaded hole at one end of the horizontally-arranged guide arm assembly (302) and is fastened through a hexagonal-head nut.

6. The microcirculation vehicle drive rear axle and composite suspension structure of claim 1, wherein: through emboliaing stabilizer bar staple bolt (307) stabilizer bar staple bolt (308), stabilizer bar staple bolt (308) fastening is passed through to rethread apron (309), and on rethread bolt and nut was fixed in pipe rear axle assembly (101) apron (309).

Technical Field

The invention relates to a rear axle, in particular to a drive rear axle of a microcirculation vehicle and a composite suspension structure.

Background

The new energy automobile development trend is continuously expanded in recent years, green travel is vigorously pushed by the country, traffic planning is continuously developed, a plurality of large urban areas or communities are difficult to be effectively covered by public transportation, resident points and activity areas of the large communities are far away from public transportation points such as buses and subways, and travel is convenient to become a difficult point. Therefore, a public transportation solution for the last kilometer of passengers is created, and meanwhile, the establishment of a public transportation system between scenic spots of a large tourist attraction is met; the microcirculation public transport system solves the convenience of passenger public transport travel, improves the efficiency of passenger travel and public transport operation, and well solves the problem of transfer and connection between traffic stations and tourist attractions with long distance between communities.

The new energy automobile industry is always the leading of national policies, and the inter-city passenger cars, urban passenger transport and urban and rural passenger transport volume are increased year by year and the expansion of urban scale brings great pressure to urban traffic. The microcirculation public transport is mainly driven by new energy, centralized power is used for driving, and a rigid rear axle is used as a support. The drive rear axle of the microcirculation vehicle has the characteristics of low emission, high performance, light weight, good operation stability and a composite suspension structure, meets the development requirement of the city microcirculation public transport, but the microcirculation vehicle in the market at present adopts a drum brake, a plate spring structure and a traditional power vehicle axle; the unsprung mass is large, and the control stability is poor; the drum type hydraulic brake has poor braking stability and high maintenance and replacement difficulty; the leaf spring structure suspension, it is relatively poor to take the travelling comfort. A microcirculation vehicle driving rear axle and composite suspension structure is characterized in that the total components of the whole axle are modularized, a centralized power driving module, an offset rigid rear axle housing assembly, a composite suspension and a wheel side assembly are designed, wherein the offset rigid rear axle housing assembly is used as a support and electronic parking disc brake assembly; the power driving module is arranged on the frame, so that the unsprung mass is reduced, and the control stability and the comfort are improved; the axle housing assembly structure is offset, and the spatial arrangement of a chassis is enlarged; the riding comfort is improved by the composite suspension structure; the traditional mechanical lever and tire steel cable are replaced by the electronic parking brake, and the space between the front row seats is released. In an electronic parking brake system, the braking force is adjustable to match the demand for longitudinal inclination setting to prevent the vehicle from rolling backwards on a sloping surface.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: a drive rear axle and a composite suspension structure of a microcirculation vehicle are provided.

The technical scheme for solving the technical problems is as follows: the utility model provides a microcirculation car drive rear axle and compound suspension structure, includes axle housing assembly, centralized power drive module assembly, compound suspension structure, electron parking hydraulic disc braking system, stopper assembly and wheel limit assembly, and whole bridge compound suspension structure sets up on the axle housing assembly, fastens on the central siphon with adjusting nut for the wheel limit assembly, and whole centralized power drive module assembly passes through the bolt-up and on the whole car chassis frame. Each modular assembly is connected by bolts and is supported by an offset rigid rear axle housing assembly, the centralized power driving module assembly is arranged on the frame, and power torque is transmitted to the wheel end through the transmission shaft assemblies at the two ends; the composite suspension structure is fastened on the axle housing assembly through bolt connection; the electrified parking brake is fastened on the axle assembly through a mounting plate. The assembly modularization reduces the assembly beat of the assembly parts, the sub-assemblies can improve the assembly precision, the product quality and the maintenance cost.

The axle housing assembly comprises a circular tube rear axle assembly and a support frame, the support frame comprises a left support frame and a right support frame, and the left support frame and the right support frame are respectively arranged at two ends of the circular tube rear axle assembly; the whole bridge composite suspension structure comprises a horizontally-arranged guide arm assembly, a shock absorber assembly, an air bag assembly, a transverse stabilizer bar and a suspender assembly, wherein the horizontally-arranged guide arm assembly is arranged on a support frame; the centralized power driving module assembly comprises a motor, a speed reducer and a transmission shaft, wherein the speed reducer is connected with the motor, one end of the transmission shaft is connected with the speed reducer, the other end of the transmission shaft is connected with a wheel hub, and the whole centralized power driving module assembly is fastened on a whole chassis frame through a bolt; the electronic parking hydraulic disc type braking system comprises an electronic parking controller and a disc type hydraulic brake, wherein the disc type hydraulic brake is connected with the electronic parking controller.

The further technical scheme of the invention is as follows: and a shock absorber support is arranged on a support frame of the axle housing assembly, and the shock absorber assembly is arranged on the shock absorber support.

The right support frame and the left support frame are fastened on the circular tube rear shaft assembly through flange bolts respectively, and the shaft tube is fastened on the right support frame and the left support frame respectively through hexagon socket head cap screws.

Before assembly, a motor and a speed reducer are assembled under a line to form a small assembly, the small assembly is assembled and installed on a whole vehicle frame after the small assembly is on the line, one end of a transmission shaft is fastened on a transmission shaft spline end of a hub assembly through a transmission shaft wheel end fastening bolt, and a flange at the other end of the transmission shaft is fastened on the speed reducer through an inner hexagon screw and a toothed locking washer.

The horizontally-arranged guide arm assembly is stably placed on the support frame, the bolt penetrates through a leaf spring mounting hole of the support frame through a horse riding bolt and then is fastened with a nut, and the bolt penetrates through a unthreaded hole in one end of the horizontally-arranged guide arm assembly and is fastened through a hexagon nut.

Through emboliaing stabilizer bar staple bolt, the rethread apron fastens the stabilizer bar staple bolt, and rethread bolt and nut will lap and be fixed in on the pipe rear axle assembly.

Due to the adoption of the technical scheme, the drive rear axle and the composite suspension structure of the microcirculation vehicle have the following beneficial effects:

1. the axle housing assembly is arranged in a biased mode through bolts, and is formed by fastening bolts such as a welding piece rear shaft circular tube assembly, a left/right support frame, an axle tube and a shock absorber support.

2. The driving rear axle adopts a composite suspension structure and consists of a horizontally arranged guide arm assembly, an air bag, a shock absorber, a transverse stabilizer bar, a suspender, a transverse thrust bar and the like; the whole bridge is provided with a composite suspension structure to replace the traditional plate spring structure of the microcirculation vehicle. The offset frequency of the whole vehicle suspension is reduced, and the riding comfort is improved.

3. The power module assembly consists of a speed reducer assembly and a motor, the speed reducer adopts two-stage speed reduction to fix the speed ratio, the speed ratio is high, the torque is increased, the transmission efficiency is high, and the arrangement of the high-power-density small motor is realized; the integrated power module is installed on the frame, so that unsprung mass is reduced, and the control stability and comfort of the whole vehicle are improved.

4. The parking system consists of a brake assembly, a controller assembly, a wire harness and an EPB control switch, the brake adopts a driving/parking integrated mode, the parking function is realized through double-motor thrust clamping, the parking torque is increased, the micro-cycle vehicle adopts an electronic parking brake system for the first time, the traditional mechanical lever and a tire steel cable are replaced, and the space between front row seats is released; the braking force can be adjusted to match the requirements of the longitudinal inclination setting, always applying the maximum parking clamping force and preventing the vehicle from slipping backwards on the slope.

The technical features of a micro-cycle vehicle drive rear axle and composite suspension structure according to the present invention will be further described with reference to the drawings and the embodiments of the present disclosure.

Drawings

FIG. 1: a structural schematic diagram of a drive rear axle and a composite suspension structure of a microcirculation vehicle is provided.

FIG. 2: the axle housing assembly is schematically structured.

FIG. 3: the structure of the drive rear axle assembly is schematic.

FIG. 4: the electronic parking hydraulic disc type brake system is structurally schematic.

In the above drawings, the respective reference numerals are explained as follows:

1-axle housing assembly, 101-round tube rear axle assembly, 102-flange bolt, 103-vibration damper support, 104-left support frame, 105-right support frame, 106-axle tube, 107-inner hexagon screw, 108-hexagon bolt, 109-heavy type spring washer, 1010-nut, 2-centralized power drive module assembly, 201-motor, 202-reducer, 203-transmission shaft, 204-inner hexagon screw, 205-toothed lock washer, 206-transmission shaft wheel end fastening bolt, 3-whole bridge composite suspension structure, 301-bolt, 302-horizontal guide arm assembly, 303-vibration damper assembly, 304-vibration damper pin bolt, 305-nut, 306-air bag assembly, 307-transverse direction, 308-stabilizer bar hoop, 309-cover plate, 3010-bolt, 3011-nut, 3012-suspender assembly, 3013-riding bolt, 3014-thin nut, 3015-nut, 3016-suspender nut, 4-electronic parking hydraulic disc brake system, 401-electronic parking controller, 402-wire harness, 5-disc hydraulic brake, 403-mounting plate, 404-bolt and 6-wheel edge assembly.

Detailed Description

The utility model provides a microcirculation car drive rear axle and compound suspension structure, includes axle housing assembly 1, centralized power drive module assembly 2, compound suspension structure 3, electronic parking hydraulic disc braking system 4, brake assembly and wheel limit assembly 6, and whole bridge compound suspension structure 3 sets up on axle housing assembly 1, fastens on axle housing assembly 1's central siphon with adjusting nut with wheel limit assembly 6. The electronic parking hydraulic disc brake system 4 comprises hardware with an electronic parking disc brake assembly, a controller, an EPB switch and a wiring harness, and software included in the electronic parking hydraulic disc brake system 4 is a control program. The axle housing assembly is used for supporting the whole axle, the axle housing assembly is connected with the wheel side assembly, the electronic parking disc type brake assembly is arranged on the wheel side assembly, the electronic parking disc type brake assembly is used for braking and parking the whole automobile, and the electronic parking hydraulic disc type brake system drives and controls the electronic parking disc type brake assembly to execute actions; the composite suspension frame structure 3 is used for connecting an axle and a frame and transmitting torque to the whole vehicle, and the torque generated by the centralized power driving module assembly 2 is transmitted to the axle wheel end through the transmission shaft assembly to drive the whole axle to rotate. The axle housing assembly 1 comprises a circular tube rear axle assembly 101 and support frames, the support frames comprise a left support frame 104 and a right support frame 105, and the left support frame 104 and the right support frame 105 are respectively arranged at two ends of the circular tube rear axle assembly 101; the whole-axle composite suspension structure 3 comprises a horizontally-arranged guide arm assembly 302, a shock absorber assembly 303, an air bag assembly 306, a transverse stabilizer bar 307 and a suspender assembly 3012, wherein the horizontally-arranged guide arm assembly 302 is arranged on a support frame, the air bag assembly 306 is arranged on the horizontally-arranged guide arm assembly 302, the transverse stabilizer bar 307 is arranged on the circular tube rear axle assembly 101, and the suspender assembly 3012 is arranged on the transverse stabilizer bar 307; the centralized power driving module assembly 2 comprises a motor 201, a speed reducer 202 and a transmission shaft 203, wherein the speed reducer 202 is connected with the motor 201, one end of the transmission shaft 203 is connected with the speed reducer 202, the other end of the transmission shaft 203 is connected with a wheel hub, and the whole centralized power driving module assembly is fastened on a whole chassis frame through bolts; the electronic parking hydraulic disc brake system 4 comprises an electronic parking controller 401 and a disc hydraulic brake 5, wherein the disc hydraulic brake 5 is connected with the electronic parking controller 401.

The specific embodiment is as follows: the axle housing assembly 1 comprises a round tube rear axle assembly 101, a flange bolt 102, a damper bracket 103, a left support frame 104, a right support frame 105, an axle tube 106, a socket head cap screw 107, a hexagon head bolt 108, a heavy-duty spring washer 109 and a nut 1010. The circular tube rear shaft assembly 101, the left support frame 104 and the right support frame 105 are used as integral bridge force support members, a spigot of the right support frame 105 and a spigot of the left support frame 104 are respectively aligned with the circular tube rear shaft assembly 101, the right support frame 105 and the left support frame 104 are respectively fastened on the circular tube rear shaft assembly 101 through flange bolts 102, and then an axle tube 106 is respectively fastened on the right support frame 105 and the left support frame 104 through hexagon socket head cap screws 107. The shock absorber support 103 is arranged on the support frame by aligning the hole of the shock absorber support 103 with the hole of the upper end face of the support frame, penetrating the support frame by using a hexagon head bolt 108, and tightly screwing a weighting type elastic pad 109 and a nut 1010.

The centralized power driving module assembly 2 comprises a motor 201, a speed reducer 202, a transmission shaft 203, a socket head cap screw 204, a toothed lock washer 205 and a transmission shaft wheel end fastening bolt 206. Before assembly, a motor 201 and a speed reducer 202 are assembled on line to form a small assembly, after the small assembly is assembled on a frame of a whole vehicle, one end of a transmission shaft 203 is aligned with a spline of a hub assembly, the small assembly is fastened to a spline end of the transmission shaft of the hub assembly through a transmission shaft wheel end fastening bolt 206, a flange hole at the other end of the transmission shaft is aligned with a flange threaded hole of the speed reducer 202, and an inner hexagon screw 204 and a toothed locking washer 205 are fastened to the speed reducer 202. The whole centralized power driving module assembly is fastened on a whole chassis frame through bolts;

the whole bridge composite suspension structure 3 comprises a bolt 301, a horizontally arranged guide arm assembly 302, a shock absorber assembly 303, a shock absorber pin bolt 304, a nut 305, an air bag assembly 306, a transverse stabilizer bar 307, a stabilizer bar hoop 308, a cover plate 309, a bolt 3010, a nut 3011, a suspender assembly 3012, a riding bolt 3013, a thin nut 3014, a nut 3015 and a suspender nut 3016. The horizontally-arranged guide arm assembly 302 is stably placed on the support frame, namely, the horizontally-arranged guide arm assembly is stably placed on the left support frame 104 and the right support frame 105 respectively, and the riding bolt 3013 penetrates through a plate spring mounting hole of the support frame and then is fastened with the nut 3015, namely, the riding bolt is fastened with the nut 3015 through the nut 3015; the bolt 301 is passed through a smooth bore at one end of the flat pilot arm assembly 302 and tightened with a hex-head nut. The air bag assembly 306 is aligned with the mounting hole at the other end of the horizontally arranged guide arm assembly, passes through the unthreaded hole and is fastened by a thin nut 3014. The damper assembly 303 is aligned with the damper bracket 103 bore and the damper pin bolt 304 is aligned through and secured with a nut 305. Firstly, a stabilizer bar hoop 308 is sleeved into a transverse stabilizer bar 307, then the stabilizer bar hoop 308 is fastened through a cover plate 309, namely the cover plate 309 is aligned with a stabilizer bar hoop clamping groove to be vertically fastened, then the cover plate 309 is fixed on a circular tube rear shaft assembly 101 through a bolt and a nut, namely a unthreaded hole of the cover plate 309 is aligned with a support on the circular tube rear shaft assembly 101, and the transverse stabilizer bar is fastened on the circular tube rear shaft assembly through a bolt 3010 and a nut 3011. One end of the suspender assembly 3012 is aligned with the taper hole of the transverse stabilizer bar and is fastened by a suspender nut 3016 after passing through.

The electronic parking hydraulic disc type brake system 4 comprises an electronic parking controller 401, a wiring harness 402, a disc type hydraulic brake 5, a mounting plate 403 and a bolt 404, after threaded holes of the disc type hydraulic brake 5 are aligned with unthreaded holes of the mounting plate 403, the disc type hydraulic brake 5 is fastened with the mounting plate 403 through the bolt 404, the electronic parking controller 401 is fastened on a chassis frame, a connector of the wiring harness 402 is connected into the electronic parking controller, and the other end of the wiring harness 402 is connected with a parking motor connector on the disc type hydraulic brake to form a closed-loop system route.