CN218482742U

CN218482742U - Belt pulley disc brake single-arm motor structure

Info

Publication number: CN218482742U
Application number: CN202222482166.4U
Authority: CN
Inventors: 王晓康; 徐洁航; 郭志凯
Original assignee: Jinhua Zhuoyuan Industry Co ltd
Current assignee: Jinhua Zhuoyuan Industry Co ltd
Priority date: 2022-09-19
Filing date: 2022-09-19
Publication date: 2023-02-14
Anticipated expiration: 2032-09-19

Abstract

The utility model discloses a single armed motor structure of belt pulley dish brake, its technical scheme main points include wheel hub, motor shaft and motor drive mechanism, wherein motor drive mechanism sets up on the motor shaft and lies in the wheel hub, and motor drive mechanism and wheel hub inner wall connection, and motor drive mechanism is used for driving wheel hub rotation thereby drives the wheel rotation; wheel hub includes the base and sets up in the motor end cover of base opening part and the motor end cover outside is connected with the dish and stops the dish to the dish is stopped the dish and is used for the dish to stop the braking, and the motor end cover is stopped at the dish and is coiled one side and be provided with connecting portion, and motor shaft one end is located the base, and the motor shaft other end passes connecting portion and exposes, is connected with the belt pulley on the connecting portion, and the belt pulley is used for belt drive, and the mounting distance that the dish was stopped is greater than the external diameter of belt pulley. Compared with the prior art, the disc brake is safer to use, lubricating oil is not required to be added due to the use of belt transmission, and the user is prevented from being polluted during folding.

Description

Belt pulley disc brake single-arm motor structure

Technical Field

The utility model relates to a folding electric bicycle field, more specifically say that it relates to a single armed motor structure is stopped to belt pulley dish.

Background

The folding electric bicycle is driven by electricity and is a foldable tool for riding instead of walk, and can be conveniently carried, conveniently parked and also conveniently used during commuting even if the folding electric bicycle is not powered. However, in order to facilitate folding and use of the electric bicycle, the motor is often a single-arm hub motor to reduce the volume and space.

However, the existing single-arm motor has the following problems:

the traditional chain transmission is adopted in the existing single-arm motor, the chain is easy to generate noise, if the chain is not cleaned and maintained regularly, the chain is worn quickly, and meanwhile, oil stains on the chain easily pollute clothes, trousers and hands when a bicycle is ridden and folded.

Moreover, the existing single-arm motor adopts a V-shaped brake structure, but the V-shaped brake friction plate is easy to age and wear, and can slip in rainy days to cause unobvious braking effect and even cause danger. And the dish braking is faster, and safer than V type braking. However, when the disc brake is installed on the motor of the electric bicycle, the transmission structure and the disc brake structure need to be installed on two sides of the motor to avoid interference. And it only one side can be connected with the frame of single armed motor, and need set up the transmission structure simultaneously in this one side to current single armed motor structure can't set up brake structure and transmission structure with the dish simultaneously in same side, thereby leads to the single armed motor can't adopt the dish to brake the braking.

Disclosure of Invention

To the not enough that prior art exists, provide a single armed motor structure of belt pulley dish brake, the device can overcome current single armed motor and lead to the problem of noise and greasy dirt because of chain drive to and current single armed motor can't use the problem that the dish stopped the braking.

In order to realize the purpose, the following technical scheme is provided:

a single-arm motor structure of a belt pulley disc brake comprises a hub, a motor shaft and a motor transmission mechanism, wherein the motor transmission mechanism is arranged on the motor shaft and positioned in the hub, the motor transmission mechanism is connected with the inner wall of the hub, and the motor transmission mechanism is used for driving the hub to rotate so as to drive a wheel to rotate;

wheel hub includes the base and sets up in the motor end cover of base opening part, and the motor end cover outside is connected with the dish and stops the dish to the dish is stopped the dish and is used for the dish to stop the braking, the motor end cover is stopped at the dish and is coiled one side and be provided with connecting portion, and motor shaft one end is located the base, and the motor shaft other end passes connecting portion and expose, be connected with the belt pulley on the connecting portion, and the belt pulley is used for belt drive to the installation distance that the dish was stopped is greater than the external diameter of belt pulley.

The utility model discloses further set up to, be provided with the fixed orifices on the motor end cover, and the dish is stopped and is coiled and be provided with the mounting hole to thereby the dish is stopped and is coiled and pass the mounting hole and fix on the motor end cover through the mounting, and the distance between mounting hole and the motor shaft axle center is the installation distance and be greater than the external diameter of belt pulley.

The utility model discloses further set up to, be provided with step one and step two on the motor end cover, and step one side is kept away from to step two is provided with connecting portion to the diameter of step one is greater than the diameter of step two, and the diameter of step two is greater than the diameter of connecting portion, the dish is stopped the set cover and is located step one, and the belt pulley cover locate on the connecting portion and keep away from the side butt of step one with step two.

The utility model discloses further set up to, be provided with the external screw thread on the connecting portion, and the belt pulley inner wall is provided with the internal thread to external screw thread and internal thread intermeshing.

The utility model is further arranged in that a first bearing is arranged between the motor shaft and the motor end cover, and a second bearing is arranged between the motor shaft and the base;

or/and a channel is arranged in the motor shaft, a joint is arranged at one end of the motor shaft, the channel is used for a power supply line to pass through, and the joint is externally connected with a power supply and is connected with the stator core through an electric wire.

The utility model discloses further set up to, the one side that the motor end cover was kept away from to the base is provided with the magnetic ring iron sheet, thereby adsorbs on the frame when just magnetic ring iron sheet is used for the bicycle folding position after folding to inject.

The utility model discloses further set up as, motor drive mechanism includes magnet steel ring assembly body and planetary gear set, and is provided with stator core and rotatable magnet steel ring assembly body on the motor shaft, and magnet steel ring assembly body embeds has the magnet steel, and the magnet steel encircles and sets up outside stator core;

the planetary gear set is rotationally arranged on the motor shaft, the inner wall of the base is provided with an inner gear ring, and the planetary gear set is meshed with the inner gear ring, so that the motor transmission mechanism drives the wheel hub.

To sum up, the following beneficial effects are achieved in the technical scheme:

the utility model discloses a setting of motor end cover and connecting portion and dish are stopped the installation distance of dish and are greater than the external diameter of belt pulley to avoid the dish to stop the dish and interfere and then can be at the homonymy installation with the belt pulley, realized promptly that single armed motor and dish are stopped the compatibility of braking structure, thereby make the folding electric bicycle who uses the single armed motor also can adopt the dish to stop the braking.

Meanwhile, the belt pulley is used for transmission, compared with the existing folding electric bicycle which adopts chain transmission, the belt pulley is not easy to wear and almost has no noise, and lubricating oil is not required to be added, so that the user is prevented from being polluted during folding.

Drawings

Fig. 1 is a schematic three-dimensional structure diagram of a single-arm motor structure of a pulley disc brake.

Fig. 2 is an exploded view of a pulley disc brake single-arm motor structure.

Fig. 3 is a sectional view of a single-arm motor structure of a pulley disc brake.

Fig. 4 is a schematic view of a connection three-dimensional structure of a motor end cover, a belt pulley and a disc brake disc.

Fig. 5 is a schematic perspective view of a motor end cover.

Reference numerals: 1. a base; 11. a magnetic ring iron sheet; 12. an inner gear ring; 2. a motor shaft; 21. a joint; 22. a channel; 3. a magnetic steel ring assembly body; 32. magnetic steel; 33. a magnetic steel fixing ring; 4. a planetary gear set; 41. a planetary gear; 42. a sun gear; 5. a motor end cover; 51. a connecting portion; 52. a fixing hole; 53. a step I; 54. a step II; 6. a clutch; 61. connecting columns; 71. a first bearing; 72. a second bearing; 73. a third bearing; 8. a PCB board; 9. a belt pulley; 10. a disc brake disc; 20. a stator core is provided.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Referring to fig. 1, a single armed motor structure of belt pulley dish brake, including wheel hub, motor shaft 2 and motor drive mechanism, wherein motor drive mechanism sets up on motor shaft 2 and is located wheel hub, and motor drive mechanism and wheel hub inner wall connection to thereby motor drive mechanism is used for driving wheel hub to rotate and drives the wheel rotation.

Wheel hub includes base 1 and sets up in the motor end cover 5 of 1 opening part of base simultaneously, and 2 one end of motor shaft passes motor end cover 5 and exposes, and the 5 outside of motor end cover is connected with the dish 10 of stopping, and dish 10 of stopping is used for the dish braking of stopping, motor end cover 5 is provided with connecting portion 51 in dish 10 one side of stopping simultaneously, and 2 one end of motor shaft is located base 1, and the 2 other end of motor shaft passes connecting portion 51 and exposes, and be connected with belt pulley 9 on the connecting portion 51, and belt pulley 9 is used for belt drive, and the mounting distance that the dish 10 of stopping is greater than the external diameter of belt pulley 9.

The utility model discloses a motor end cover 5 and connecting portion 51 set up and the mounting distance that the dish was stopped and is coiled 10 is greater than belt pulley 9's external diameter to avoid the dish to stop dish 10 and belt pulley 9 to interfere and then can be in the homonymy installation, realized promptly that single armed motor and dish are stopped the compatibility of braking structure, make the folding electric bicycle who uses the single armed motor also can adopt the dish to stop the braking.

Meanwhile, the belt pulley 9 is used for transmission, compared with the existing folding electric bicycle adopting chain transmission, the belt pulley 9 is not easy to wear, almost has no noise, does not need frequent maintenance, and does not need to add lubricating oil, thereby avoiding polluting a user when folding.

Further, the connection mode of the motor end cover 5 and the base 1 is specifically that a first connection hole is formed in the outer side of the motor end cover 5, a second connection hole is formed in the surface, close to the motor end cover 5, of the base 1, and the motor end cover 5 penetrates through the first connection hole and the second connection hole through a cross countersunk head screw to be connected with the base 1.

In addition, a fixing hole 52 is formed in the motor end cover 5, a mounting hole is formed in the disc brake disc 10, the disc brake disc 10 is fixed to the motor end cover 5 by a fixing member penetrating through the mounting hole and the fixing hole 52, and the distance between the mounting hole and the axis of the motor shaft 2 is a mounting distance and is larger than the outer diameter of the belt pulley 9.

And the external diameter that the dish was stopped to the dish 10 of stopping is greater than belt pulley 9 apart from avoiding interfering also be convenient for installation and dismantlement, this is because when needs installation or pull down dish 10 of stopping, if the dish is stopped 10 installation distances and is less than belt pulley 9 external diameter, then dismantle or the installation need pull down belt pulley 9 earlier and just can pull down dish 10 of stopping and pull down again, and the installation distance that stops dish 10 sets up to being greater than the external diameter of belt pulley 9, make dish 10 and belt pulley 9 of stopping not influence mutually when the dismouting, the installation and the dismantlement of dish 10 of stopping have been made things convenient for.

Further, the fixing part of the disc brake disc 10 arranged on the motor end cover 5 is a hexagon socket head flat round head screw.

Furthermore, the surface of the disc brake disc 10 is provided with a plurality of through holes, so that heat dissipation is accelerated during disc brake braking, and the disc brake disc 10 is prevented from deforming due to overhigh temperature of the disc brake disc 10.

The specific mode of disc brake is that a brake oil cylinder is arranged at a position close to the edge of the disc brake disc 10, a piston and a brake block connected with the piston are arranged in the brake oil cylinder, and the piston is pushed by pressurizing the brake oil cylinder, so that the brake block contacts the disc brake disc 10 to generate brake torque, and the brake is realized. The brake cylinder, the piston and the brake block are not described in detail in the prior art.

In addition, a first step 53 and a second step 54 are arranged on the motor end cover, a connecting portion 51 is arranged on one side, away from the first step 53, of the second step 54, the diameter of the first step 53 is larger than that of the second step 54, the diameter of the second step 54 is larger than that of the connecting portion 51, the disc brake disc 10 is sleeved on the first step 53, and the belt pulley 9 is sleeved on the connecting portion 51 and is abutted to the side face, away from the first step 53, of the second step 54.

Therefore the utility model discloses a be provided with step one 53 and step two 54 on the motor end cover 5 with motor end cover 5, the dish is stopped and is coiled 10 covers and locate step one 53, and the belt pulley 9 cover locate on connecting portion 51 and keep away from the side butt of step one 53 with step two 54, make to stop and be provided with the interval between dish 10 and the belt pulley 9, thereby further avoid stopping the interference of dish 10 and belt pulley 9, avoid promptly that the dish is stopped and coil 10 and produce the influence to the belt of installing on belt pulley 9 contact when the transmission, make dish 10 and belt pulley 9 of stopping compatible in single armed motor one side.

In addition, a first bearing 71 is arranged between the motor shaft 2 and the motor end cover 5, and a second bearing 72 is arranged between the motor shaft 2 and the base 1.

Or/and a channel 22 is arranged in the motor shaft 2, a joint 21 is arranged at one end of the motor shaft 2, the channel 22 is used for passing a power supply wire, and the joint 21 is externally connected with a power supply and is connected with the stator core 20 through a wire.

Consequently through bearing 71 and bearing two 72's setting to realize the wheel hub and rotate and the motionless condition of motor shaft 2, and support motor shaft 2 and wheel hub through bearing 71 and bearing two 72, and reduce when wheel hub rotates and static motor shaft 2 between the friction and improve the gyration precision, reduce the wearing and tearing that running friction brought, prolong the utility model discloses a life.

Further, the first bearing 71 and the second bearing 72 are specifically deep groove ball bearings.

Simultaneously when the utility model discloses during the operation, stator core 20 need be connected with the battery on the frame, is provided with passageway 22 in consequently through motor shaft 2, and sets up the electric wire in the

passageway

22, and 2 one end of motor shaft set up in addition connect 21 and with the connection of electric lines, and electric wire and stator core 20 are connected, connect 21 and power connection, simultaneously because motor shaft 2 and stator core 20 are immovable to can avoid the electric wire and other parts within a definite time winding and the electric wire leads to the situation of damage along with wheel hub rotation.

The connection between the joint 21 and the motor shaft 2 is specifically that the joint 21 is inserted into the motor shaft 2 and then fixed on the motor shaft 2 through a nut.

In addition, a magnetic ring iron sheet 11 is arranged on one surface of the base 1 far away from the motor end cover 5, and the magnetic ring iron sheet 11 is used for being adsorbed on the frame when the bicycle is folded so as to limit the folded position.

After the folding bicycle is folded, a certain fixing device is needed for fixing, and the existing folding bicycle is usually fixed by adopting a locking structure, so that the operation is troublesome. The utility model discloses a be provided with magnetic ring iron sheet 11 on motor end cover 5, when folding bicycle is folding, attract through the frame of magnetic ring iron sheet 11 and bicycle and fix, need not to set up extra fixing device, convenient pleasing to the eye.

Further, the connection between the magnetic ring iron sheet 11 and the base 1 can be a screw connection.

In addition, the motor transmission mechanism comprises a magnetic steel ring assembly body 3 and a planetary gear set 4, a stator core 20 and the rotatable magnetic steel ring assembly body 3 are arranged on the motor shaft 2, magnetic steel 32 is arranged in the magnetic steel ring assembly body 3, and the magnetic steel 32 is arranged outside the stator core 20 in a surrounding mode;

meanwhile, the planetary gear set 4 is rotatably arranged on the motor shaft 2, the inner wall of the base 1 is provided with the inner gear ring 12, and the planetary gear set 4 is meshed with the inner gear ring 12, so that the motor transmission mechanism drives the wheel hub.

Further, wherein magnet steel 32's fixed knot constructs for, and magnet steel circle assembly body 3 includes that magnet steel retainer plate 33 and magnet steel retainer plate 33 inner wall are provided with sunkenly, and magnet steel 32 can imbed sunkenly to realize that magnet steel 32 fixes on magnet steel assembly body 3.

Further, the bearing of adaptation with it is provided with in magnet steel retainer plate 33 and motor shaft 2 junction to stator core 20 and magnet steel assembly body 3 and magnet steel 32 all contactless reduce the friction to motor shaft 2 when magnet steel ring assembly body 3 rotates.

Further, the one end that sun gear 42 was kept away from to magnet steel circle assembly body 3 is provided with PCB board 8, and PCB board 8 and stator core 20 are connected to PCB board 8 is used for controlling the motor commutation.

Simultaneously the concrete structure and the principle of PCB board 8 do, PCB board 8 is fan-shaped to be provided with 3 hall element on the PCB board 8, and adjacent hall element interval 60, because PCB board 8 and stator core 20 are fixed, and along with the motor motion, thereby lead to hall element's hall signal to produce periodic variation, can distribute the driving signal of motor according to three hall element's hall signal, thereby control the motor commutation.

Further, the motor transmission mechanism further includes a clutch 6, while the planetary gear set 4 includes a sun gear 42 and a plurality of planetary gears 41, and the planetary gear set 41 is rotatably disposed on the clutch 6, and the sun gear 42 is rotatably disposed on the motor shaft 2, and the sun gear 42 and the planetary gears 41 are engaged with each other.

Therefore, in the actual use process, the output torque and the rotating speed of the motor are adjusted through the arrangement of the planetary gear 41 and the clutch 6, and when the rotating speed of the motor is too high, the motor is started or suddenly stopped, the protection is carried out through the movement of the planetary gear set 4 and the clutch 6, so that the motor can run stably.

Further, the clutch 6 and the planetary gear 41 are connected in such a way that the clutch 6 is provided with a connecting column 61, the connecting column 61 penetrates through the center of the planetary gear 41 for connection, and a plurality of bearings three 73 are arranged on the connecting column 61, and the planetary gear 41 and the clutch 6 are connected through the connecting column 61.

Further, the planetary gear 41 is a duplicate gear, and the upper end of the planetary gear 41 is engaged with the ring gear 12 while the lower end thereof is engaged with the sun gear 42 to drive the hub to rotate.

Furthermore, the driving mode of the planetary gear set 4 is that the lower end of the sun gear 42 is integrally provided with a flange, and the top of the magnetic steel assembly 3 is provided with a recess matched with the flange, so that the sun gear 42 and the magnetic steel assembly 3 are fixed and rotate along with the sun gear and the magnetic steel assembly 3, and the planetary gear 41 is driven to move.

Furthermore, the planet gear 41 and the sun gear 42 are both helical gears, so that the transmission efficiency is higher, and the bearing capacity is better.

Wherein the utility model discloses concrete rotation mode does, and stator core 20 produces magnetic field after the circular telegram, and the magnet steel 32 that encircles stator core 20 takes place to rotate because of the magnetic field effort, drives the whole rotation of magnet steel assembly body 3, and magnet steel assembly body 3 drives the planetary gear set 4 who sets up in its one side and rotates after that, and planetary gear set 4 passes through ring gear 12 and drives base 1 and rotate.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the connection between the disc brake disc 10 and the motor end cover 5, the belt pulley 9 and the motor end cover 5 may be simply exchanged for other similar connections, and these improvements and finishes should be considered as the protection scope of the present invention.

Claims

1. A single-arm motor structure of a belt pulley disc brake is characterized by comprising a hub, a motor shaft and a motor transmission mechanism, wherein the motor transmission mechanism is arranged on the motor shaft and positioned in the hub, the motor transmission mechanism is connected with the inner wall of the hub, and the motor transmission mechanism is used for driving the hub to rotate so as to drive a wheel to rotate;

wheel hub includes the base and sets up in the motor end cover of base opening part, and motor shaft one end passes the motor end cover and exposes, just the motor end cover outside is connected with the dish and stops the dish to the dish is stopped and is used for the dish to stop the braking, the motor end cover is stopped at the dish and is coiled one side and be provided with connecting portion, and motor shaft one end is located the base to the motor shaft other end passes connecting portion and exposes, be connected with the belt pulley on the connecting portion, and the belt pulley is used for belt drive to the installation distance that the dish was stopped is greater than the external diameter of belt pulley.

2. The single-arm motor structure of a belt pulley disc brake as claimed in claim 1, wherein the motor cover is provided with a fixing hole, the disc brake disc is provided with a mounting hole, the disc brake disc is fixed on the motor cover by a fixing member passing through the mounting hole and the fixing hole, and the distance between the mounting hole and the axle center of the motor shaft is a mounting distance and is greater than the outer diameter of the belt pulley.

3. The single-arm motor structure of a belt pulley disc brake as claimed in claim 1, wherein the motor end cover is provided with a first step and a second step, the first step is provided with a connecting portion far away from one side of the first step, the diameter of the first step is larger than that of the second step, the diameter of the second step is larger than that of the connecting portion, the disc brake disc is sleeved on the first step, and the belt pulley is sleeved on the connecting portion and abuts against the side face, far away from the first step, of the second step.

4. The pulley disc brake single-arm motor structure according to claim 3, wherein the connecting portion is provided with an external thread, the inner wall of the pulley is provided with an internal thread, and the external thread and the internal thread are engaged with each other.

5. The single-arm motor structure of the belt pulley disc brake as claimed in any one of claims 1 to 4, wherein a first bearing is arranged between the motor shaft and the motor end cover, and a second bearing is arranged between the motor shaft and the base;

6. The structure of the single-arm motor with the pulley disc brake as claimed in any one of claims 1 to 4, wherein a magnetic ring iron sheet is disposed on a surface of the base away from the motor end cover, and the magnetic ring iron sheet is used for being attached to the frame when the bicycle is folded so as to limit the folded position.

7. The single-arm motor structure of the belt pulley disc brake as claimed in any one of claims 1 to 4, wherein the motor transmission mechanism comprises a magnetic steel ring assembly and a planetary gear set, and a stator core and a rotatable magnetic steel ring assembly are arranged on a motor shaft, and magnetic steel is arranged in the magnetic steel ring assembly and is arranged outside the stator core in a surrounding manner;