阅读说明：本技术 一种用于电动三轮车的传动组件 (Transmission assembly for electric tricycle ) 是由 李少波 张钧星 吴封斌 苏援农 魏仁义 周鹏 李梦晗 于 2021-09-02 设计创作，主要内容包括：本发明公开了一种用于电动三轮车的传动组件,包括变速箱和后桥壳,变速箱下部嵌入后桥壳内且与其上端面固定连接,后桥壳内变速箱的输出端通过传动轴连接到轮毂,轮毂上设置有刹车盘,后桥壳两端固定连接有两根桥管,每根传动轴内置于桥管内并与其旋转连接,每根传动轴一端伸入变速箱内通过内端轴承旋转连接到变速箱上,外端通过外端轴承旋转连接到桥管上。本发明采用两个轴承旋转支撑传动轴,内端轴承直接安装在变速箱内,使得传动轴的内端连接的锥齿轮悬臂距离更短,两个轴承支承,支撑更加合理,也便于同轴安装,确保安装精度,锥齿轮靠轴承支撑点距离更短后,在锥齿轮高速旋转过程中,避免甩动,降低锥齿轮损坏概率,而且噪音降低。(The invention discloses a transmission assembly for an electric tricycle, which comprises a gearbox and a rear axle housing, wherein the lower part of the gearbox is embedded into the rear axle housing and fixedly connected with the upper end face of the rear axle housing, the output end of the gearbox in the rear axle housing is connected to a wheel hub through a transmission shaft, a brake disc is arranged on the wheel hub, two ends of the rear axle housing are fixedly connected with two axle tubes, each transmission shaft is arranged in the axle tube and rotatably connected with the axle tube, one end of each transmission shaft extends into the gearbox and is rotatably connected to the gearbox through an inner end bearing, and the outer end of each transmission shaft is rotatably connected to the axle tube through an outer end bearing. The transmission shaft is rotatably supported by the two bearings, the inner end bearing is directly installed in the gearbox, so that the distance between the bevel gear cantilevers connected with the inner end of the transmission shaft is shorter, the two bearings are supported, the support is more reasonable, the coaxial installation is convenient, the installation precision is ensured, and after the distance between the bevel gear and the bearing supporting point is shorter, the bevel gear is prevented from swinging in the high-speed rotating process, the damage probability of the bevel gear is reduced, and the noise is reduced.)

1. A transmission assembly for an electro-tricycle, comprising: including gearbox (2) and rear-axle housing (3), gearbox (2) lower part embedding rear-axle housing (3) in and rather than up end fixed connection, the output of gearbox (2) is connected to wheel hub (4) through transmission shaft (12) in rear-axle housing (3), two bridge tube (7) of rear-axle housing (3) both ends fixedly connected with, place in bridge tube (7) in every transmission shaft (12) and rather than swivelling joint, every transmission shaft (12) one end stretches into in gearbox (2) through inner bearing (24) swivelling joint to on gearbox (2), the outer end passes through outer end bearing (25) swivelling joint to on bridge tube (7).

2. A drive assembly for an electro-tricycle, as claimed in claim 1, wherein: rear-axle housing (3) are big disc structure, and two bridge tube (7) are connected after both ends smooth transition and rather than inside intercommunication, and the bottom is provided with dome form chamber portion (13) of underbeam, and rear-axle housing (3) are one shot casting's integral type structure, and rear-axle housing (3) upside is provided with ring flange (14) of connecting gearbox (2), and both ends are provided with step hole (15) of embedding bridge tube (7).

3. A drive assembly for an electro-tricycle, as claimed in claim 1, wherein: the input fixedly connected with motor (1) of gearbox (2), motor shaft (8) of motor (1) are through two bearing (9) swivelling joint on motor casing (10), and motor shaft (8) stretch out bearing (9) outer lane protrusion motor casing (10) surface half of motor casing (10) one end, and bearing (9) protrusion half part is embedded into in spacing groove (11) of gearbox (2).

4. A drive assembly for an electro-tricycle, as claimed in claim 1, wherein: gearbox (2) is including setting up driving gear (26) at motor shaft (8) tip, driven gear (27), gear shaft (28), ring gear (29) and ring gear case (30), driven gear (27) fixed connection is on gear shaft (28) and mesh mutually with driving gear (26), gear shaft (28) both ends swivelling joint is on gear box (31), gear portion (32) and ring gear (29) mesh of gear shaft (28), ring gear (29) fixed connection is on ring gear case (30), fixedly connected with initiative bevel gear axle (35) in ring gear case (30), two initiative bevel gear (33) of initiative bevel gear axle (35) both ends fixedly connected with, meshing has two driven bevel gear (34) in initiative bevel gear (33) both sides, two driven bevel gear (34) fixed connection is on transmission shaft (12), ring gear case (30) both ends are passed through inner bearing (24) swivelling joint and are located transmission shaft (2) and are stretched into ring gear (12) and are stretched into ring gear A tank (30).

Technical Field

The invention belongs to the technical field of electric tricycles, and relates to a transmission assembly for an electric tricycle.

Background

The electric tricycle is one of main transportation tools, can carry goods and passengers, is widely used in China, and has the characteristics of simple structure, mature technology, flexibility, maneuverability, convenience in use and the like. The transmission shaft of the existing electric tricycle is supported by three bearings, two options are connected in the bridge pipe, the other bearing is installed on the other side surface of the gearbox, if two bearings are adopted, a bevel gear at the inner end of the transmission shaft is far away from a supporting point, the bevel gear can swing, the bevel gear is damaged, and the generated noise is large.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: a transmission assembly for an electro-tricycle is provided to solve the above-mentioned problems in the prior art.

The technical scheme adopted by the invention is as follows: the utility model provides a drive assembly for electric tricycle, including gearbox and rear-axle housing, in the gearbox lower part embedding rear-axle housing and rather than up end fixed connection, the output of gearbox is connected to wheel hub through the transmission shaft in the rear-axle housing, be provided with the brake disc on the wheel hub, two bridge pipes of rear-axle housing both ends fixedly connected with, place in the bridge pipe in every transmission shaft and rather than swivelling joint, every transmission shaft one end stretches into in the gearbox through inner bearing swivelling joint to gearbox on, the outer end passes through outer end bearing swivelling joint to the bridge pipe on.

Preferably, the input fixedly connected with motor of above-mentioned gearbox, the motor shaft of motor pass through two bearing swivelling joints on the motor casing, and the motor shaft stretches out half of motor casing surface of bearing outer lane protrusion of motor casing one end, and half part embedding of bearing protrusion is to the spacing inslot of gearbox.

Preferably, the rear axle housing is of a large disc structure, two ends of the rear axle housing are in smooth transition and then are connected with two axle pipes and communicated with the inside of the rear axle housing, a dome-shaped cavity portion which is downward convex is arranged at the bottom of the rear axle housing, the rear axle housing is of an integrated structure which is formed by one-step casting, a flange plate connected with a gearbox is arranged on the upper side of the rear axle housing, and stepped holes embedded into the axle pipes are formed in the two ends of the rear axle housing.

Preferably, above-mentioned gearbox is including setting up the driving gear at motor shaft tip, driven gear, the gear shaft, ring gear and ring gear case, driven gear fixed connection is on the gear shaft and mesh mutually with the driving gear, gear shaft both ends swivelling joint is on the gear box body, the gear portion and the ring gear mesh of gear shaft, ring gear fixed connection is on the ring gear case, the internal fixedly connected with initiative bevel gear shaft of ring gear, two initiative bevel gear of initiative bevel gear shaft both ends fixedly connected with, the meshing of initiative bevel gear both sides has two driven bevel gear, two driven bevel gear fixed connection are on the transmission shaft, ring gear case both ends are through inner bearing swivelling joint on the gearbox and lie in the transmission shaft and stretch into ring gear case department.

The invention has the beneficial effects that: compared with the prior art, the invention has the following effects:

(1) the transmission shaft is rotatably supported by the two bearings, the inner end bearing is directly installed in the gearbox, so that a bevel gear cantilever connected with the inner end of the transmission shaft is shorter, the two bearings are supported, the support is more reasonable, the coaxial installation is convenient, the installation precision is ensured, and after the distance of the bevel gear close to the bearing supporting point is shorter, the bevel gear is prevented from swinging in the high-speed rotating process, the damage probability of the bevel gear is reduced, and the noise is reduced;

(2) the rear axle housing is integrally formed by casting, so that the cost is greatly reduced, casting forming is realized, the size can be smaller, the lightweight design of the tricycle is convenient to realize, and the cast disc-shaped structure and the dome-shaped bottom of the disc-shaped structure are better in strength and rigidity on one hand, and the dome-shaped slope structure at the bottom plays a role in buffering load, so that the damage caused by hard collision is avoided, and the service life is prolonged;

(3) the bearing close to the outer end of the motor shaft protrudes out of the motor shell, the protruding part is used for positioning the motor and the gearbox, the bearing precision is high, the positioning precision is better, the coaxiality of the bearing and the motor shaft is better, the precision of the gear matching position of the inner end of the motor shaft is higher after assembly, a positioning ring and a positioning groove are not needed, the structures of the motor shell and the gearbox shell are greatly simplified, and the manufacturing cost is lower;

(4) the gear box structure has the advantages of accurate and stable transmission, multi-stage speed change, large power and convenience in climbing.

Drawings

FIG. 1 is a schematic perspective view of a driving device

FIG. 2 is a front view of the driving device;

FIG. 3 is a schematic top view of the driving device;

FIG. 4 is a schematic cross-sectional view of C-C of FIG. 3;

FIG. 5 is a schematic perspective view of a motor-coupled transmission;

FIG. 6 is a left side view schematic diagram of the motor-coupled transmission;

FIG. 7 is a schematic sectional view taken along line A-A in FIG. 6;

FIG. 8 is a front view of the motor-coupled transmission;

FIG. 9 is a schematic cross-sectional view of B-B of FIG. 8;

FIG. 10 is a perspective view of the ring gear connection;

FIG. 11 is a front view of a gear ring connection

FIG. 12 is a schematic sectional view taken along line A-A in FIG. 11;

FIG. 13 is a schematic cross-sectional view of B-B of FIG. 11;

FIG. 14 is a schematic view of an integrated three-dimensional structure of a hub brake pad;

FIG. 15 is a schematic left view of the integrated structure of the hub brake pad;

FIG. 16 is a schematic sectional view taken along line A-A in FIG. 15;

FIG. 17 is a schematic diagram of a half-bridge three-dimensional structure;

FIG. 18 is a schematic diagram of a half bridge left view configuration;

FIG. 19 is a schematic sectional view taken along line A-A in FIG. 18;

FIG. 20 is a schematic sectional view of B-B of FIG. 19.

Detailed Description

The invention is further described with reference to the accompanying drawings and specific embodiments.

Example 1: as shown in fig. 1 to 20, a driving device for an electric tricycle includes a transmission case 2 and a rear axle housing 3, wherein the lower portion of the transmission case 2 is embedded in the rear axle housing 3 and is fixedly connected with the upper end surface thereof; the output of gearbox 2 is connected to wheel hub 4 through transmission shaft 12 in the rear-axle housing 3, and two bridge pipes 7 of 3 both ends fixedly connected with of rear-axle housing, place in bridge pipe 7 and rather than swivelling joint in every transmission shaft 12, and every transmission shaft 12 one end stretches into in the gearbox 2 through inner end bearing 24 swivelling joint to on the gearbox 2, outer end through outer end bearing 25 swivelling joint to on the bridge pipe 7.

Example 2: as shown in fig. 1-20, a driving device for an electric tricycle comprises a motor 1, a transmission case 2, a rear axle housing 3 and two wheel hubs 4, wherein the motor 1 is fixedly connected to an input end of the transmission case 2, a lower portion of the transmission case 2 is embedded into the rear axle housing 3 and is fixedly connected with an upper end face of the transmission case, the two wheel hubs 4 are adopted, each wheel hub 4 is connected to an output end of the transmission case 2 in the rear axle housing 3 through a transmission shaft 12, the wheel hubs 4 are sleeved behind a step end of the transmission shaft 12, the inside is located in a key ring direction, an end portion is locked by a locking nut 5, a brake disc 16 is arranged on each wheel hub 4, two bridge pipes 7 are fixedly connected with two ends of the rear axle housing 3, each transmission shaft 12 is arranged in the bridge pipes 7 and is rotatably connected with the transmission pipes, a motor shaft 8 of the motor 1 is rotatably connected to a motor housing 10 through two bearings 9, an outer ring of the bearing 9, which extends out of one end of the motor shaft 8, protrudes out of the half of the surface of the motor housing 10, the protruding half part of the bearing 9 is embedded into a limit groove 11 of the gearbox 2; the bearing that adopts to lean on the motor shaft outer end bulges motor housing, is used for the position of positioning motor and gearbox with the bulge, and the bearing precision is high, and positioning accuracy is better, and the bearing is better with the axiality of motor shaft moreover, and the gear cooperation position precision of assembly back motor shaft inner is higher, need not to set up holding ring and positioning groove, and motor housing and gearbox shell structure simplify greatly, and the cost of manufacture is lower.

Aiming at the existing welded two half-shell and bottom cover structures, the two half-shell and bottom cover structures are formed by stamping and welding three stamping parts of plates, the production cost is high, the rear axle housing formed by stamping the stamping structure has larger size, and the stamping cannot be completed because the rear axle housing is too small, in the invention, the rear axle housing 3 is a large disc structure, two ends of the rear axle housing are connected with two axle tubes 7 after smooth transition and are communicated with the inside of the rear axle housing, the bottom of the rear axle housing is provided with a downward convex dome-shaped cavity part 13, the rear axle housing 3 is an integrated structure formed by one-time casting, the upper side of the rear axle housing 3 is provided with a flange plate 14 connected with a gearbox 2, and two ends of the rear axle housing are provided with step holes 15 embedded into the axle tubes 7, the rear axle housing adopting the integrated structure formed by casting has the advantages of greatly reduced cost, smaller size and convenient realization of light weight design of a tricycle, and the disc-shaped structure and the dome-shaped bottom of the disc-shaped structure formed by casting, on the one hand, intensity and rigidity are better, and on the other hand, the domatic structure of bottom dome shape plays the effect of buffering load, avoids hard hitting hard damage, improves life.

Aiming at the problems that the hub and the brake disc of the existing tricycle adopt a split structure, the hub is connected with the rim of the wheel through bolts, the bolts can be influenced by the distance between the brake disc and the hub when penetrating through the hub, the distance needs to be increased to meet the penetrating of the bolts, so that the structure is large, the weight is heavy, the cost is high, the split structure is easy to fail at the joint, the safety and the reliability are poor, and the existing tricycle is difficult to use a disc brake device because the hub is connected with a large brake disc, in the invention, the inner end of the hub 4 is provided with the brake disc 16 which is cast into a whole with the brake disc 16, the periphery of the hub 4 is uniformly provided with a plurality of connecting holes 17, the brake disc 16 opposite to the connecting holes 17 is provided with mounting through holes 18, the diameter of the mounting through holes 18 is larger than the head diameter of screws 19 used by the connecting holes, the hub and the brake disc are arranged into a structure which is cast integrally, the brake disc is provided with the mounting through hole opposite to the hub connecting end, and in the assembling process, the screw can smoothly extend into the mounting through hole and then is pressed into the connecting hole for mounting; the structure is convenient for installing the disc brake device, and the brake effect is better.

The brake disc 16 is provided with the plurality of lightening holes 20, the damping holes 20 are uniformly distributed along the circumferential direction of the end face of the brake disc 16, and the lightening holes are formed, so that the overall weight of the tricycle can be reduced under the action of ensuring the rigidity and the strength of the brake disc, the tricycle is convenient to assemble, and the cost is lower during casting molding.

In order to increase the rigidity and stability of the hub and the brake disc, reinforcing ribs 21 are provided between the ends of the brake disc 16 connected to the hub 4.

The hub 4 is of a circular ring structure, the connecting holes 17 are formed in the convex connecting cantilever end 22 of the connecting end of the hub 4, the connecting holes are connected through the cantilever ends, the structure is simplified, the cost is lower, and the connecting stability is good.

The screw 19 is in tight fit with the connecting hole 17, and is convenient to position and better in connection stability due to the tight fit.

The above-mentioned dish that pairs with brake disc 16 mechanism 23 of stopping installs on bridge pipe 7 through bedplate 6, adopts the dish to stop on the mechanism installation axle housing, directly brakes the dish to the dish, and brake stability is good.

Preferably, 12 one ends of above-mentioned every transmission shaft stretch into in the gearbox 2 through inner bearing 24 swivelling joint to on the gearbox 2, the outer end passes through outer end bearing 25 swivelling joint to on the bridge pipe 7, adopt two bearing swivelling joint transmission shafts, inner bearing direct mount is in the gearbox, make the bevel gear cantilever distance of the inner connection of transmission shaft shorter, two bearing support, it is more reasonable to support, the coaxial arrangement of also being convenient for, ensure the installation accuracy, bevel gear leans on bearing support point distance to be shorter after, at the high-speed rotatory in-process of bevel gear, avoid whipping, reduce bevel gear damage probability, and the noise reduces.

Preferably, the gearbox 2 comprises a driving gear 26, a driven gear 27, a gear shaft 28, a gear ring 29 and a gear ring box 30, the driven gear 27 is fixedly connected to the gear shaft 28 and meshed with the driving gear 26, two ends of the gear shaft 28 are rotatably connected to the gear box 31, a gear portion 32 of the gear shaft 28 is meshed with the gear ring 29, the gear ring 29 is fixedly connected to the gear ring box 30, a driving bevel gear shaft 35 is fixedly connected to the inside of the gear ring box 30, two driving bevel gears 33 are fixedly connected to two ends of the driving bevel gear shaft 35, two driven bevel gears 34 are meshed with two sides of the driving bevel gears 33, the two driven bevel gears 34 are fixedly connected to the transmission shaft 12, two ends of the gear ring box 30 are rotatably connected to the gearbox 2 through an inner end bearing 24 and are located at a position where the transmission shaft 12 extends into the gear ring box 30, the gearbox structure has precise and stable transmission and multi-stage speed change, the power is big, the climbing of being convenient for.

The driving device has the following advantages:

(1) the bearing close to the outer end of the motor shaft protrudes out of the motor shell, the protruding part is used for positioning the motor and the gearbox, the bearing precision is high, the positioning precision is better, the coaxiality of the bearing and the motor shaft is better, the precision of the gear matching position of the inner end of the motor shaft is higher after assembly, a positioning ring and a positioning groove are not needed, the structures of the motor shell and the gearbox shell are greatly simplified, and the manufacturing cost is lower;

(2) the existing welded two half shells and bottom cover structures are formed by adopting three stamping parts and plates after stamping and then welding, the production cost is high, the size of the rear axle housing formed after stamping of the stamping structure is large, and stamping cannot be completed due to too small size;

(3) the existing tricycle hub and brake disc adopt a split structure, the hub is connected with a wheel rim by bolts, the bolts can be influenced by the distance between the brake disc and the hub when passing through the hub, the distance needs to be increased to meet the requirement of passing through the bolts, so that the structure is large, heavy in weight and high in cost, the split structure is easy to fail at the joint, the safety and the reliability are poor, in addition, the existing tricycle is difficult to use a disc brake device because the hub is connected with a large brake disc, the hub and the brake disc are arranged into an integrally cast structure, the brake disc is provided with an installation through hole which is just opposite to the hub connecting end, in the assembly process, a screw can be smoothly stretched into the installation through hole and then is pressed into the connecting hole for installation, the improvement of the structure is convenient for realizing the distance between the hub connecting end and the brake disc, therefore, the cost is reduced, and the distance is shorter, the rigidity and the strength are higher, the structure is simplified, the manufacturing cost is lower, the integral structure is adopted, and the safety and the reliability are higher; the structure is convenient for installing the disc brake device, and the brake effect is better;

(4) the weight reduction holes are arranged, so that the overall weight of the tricycle can be reduced under the action of ensuring the rigidity and the strength of the brake disc, the assembly is convenient, and the cost is lower during casting molding;

(5) the reinforcing ribs are arranged, so that the rigidity and stability of the hub and the brake disc can be improved;

(6) the cantilever end connection is adopted, so that the structure is simplified, the cost is lower, and the connection stability is good;

(7) the tight fit is adopted, so that the positioning of the screw is facilitated, and the connection stability is better;

(8) a disc brake mechanism is arranged on the axle housing to directly brake the disc brake, so that the brake stability is good;

(9) the transmission shaft is rotatably supported by the two bearings, the inner end bearing is directly installed in the gearbox, so that a bevel gear cantilever connected with the inner end of the transmission shaft is shorter in distance, the two bearings are supported, the support is more reasonable, the coaxial installation is facilitated, the installation precision is ensured, and after the distance between the bevel gear and a bearing supporting point is shorter, the bevel gear is prevented from swinging in the high-speed rotating process, the damage probability of the bevel gear is reduced, and the noise is reduced;

(10) the gear box structure has the advantages of accurate and stable transmission, multi-stage speed change, large power and convenience in climbing.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention, and therefore, the scope of the present invention should be determined by the scope of the claims.