CN217307456U

CN217307456U - Through shaft hub motor with wire outgoing from clutch end

Info

Publication number: CN217307456U
Application number: CN202220276863.1U
Authority: CN
Inventors: 温群峰
Original assignee: Suzhou Shengyi Motor Co ltd
Current assignee: Suzhou Shengyi Motor Co ltd
Priority date: 2022-02-11
Filing date: 2022-02-11
Publication date: 2022-08-26
Anticipated expiration: 2032-02-11

Abstract

The utility model discloses a through shaft hub motor with a clutch end outgoing line, which comprises a through shaft, a hub shell assembled on the through shaft, and a machine core, a planetary reduction gear and a clutch which are arranged in the hub shell and sequentially connected and assembled along the axial direction of the through shaft, wherein the machine core is provided with an outgoing line cable; the hub shell is provided with a machine core end shaft hole and a clutch end shaft hole which are respectively used for extending out of two ends of the through shaft; a base clamping mechanism is arranged on a through shaft section extending out of the hub shell through a shaft hole at the end of the machine core; the clutch is characterized in that the through shaft is internally provided with a lead-out wire hole which extends from the position of the machine core to the direction of the shaft hole at the clutch end and is communicated with the inside and the outside of the hub shell, and the lead-out wire hole is used for guiding a lead-out cable in the hub shell to the outside of the hub shell. The utility model discloses can solve the core and draw forth the interference problem of cable and card base mechanism, effectively avoid assembling the decline of the logical axle district section rigidity of card base mechanism simultaneously, still keep its compact structure and the characteristics of easily assembling when guaranteeing logical axle in-wheel motor operational reliability and life.

Description

Through shaft hub motor with wire outgoing from clutch end

Technical Field

The utility model relates to a through-shaft wheel hub motor that clutch end was qualified for next round of competitions.

Background

The through shaft hub motor is a power core component which is applied more in the industry of the electric bicycle at present, and the hub motor has the structural characteristic that a machine core, a planetary reduction mechanism and a clutch are sequentially assembled inside a hub shell along a through shaft. The output end of the machine core is fixedly sleeved with a sun gear on the through shaft, and the sun gear is meshed with a gear ring on the inner periphery of the hub shell through a plurality of planetary gears in the planetary speed reducing mechanism. Meanwhile, the planet shaft of each planet gear is connected with the outer ring of the clutch fixed on the through shaft.

The outgoing cable of the core of the original through-shaft hub motor is mainly led out after an opening is formed in the end wall of the hub shell on one side where the core is located. However, with the complicated structure of the hub motor, a clamping mechanism is mounted on the through shaft outside the end wall of the hub shell on the side of the core in the known through shaft hub motor structure so as to assemble the variable speed chain wheel. This makes it more difficult to implement the cable exiting through the opening in the end wall of the hub shell, since the base-engaging mechanism and its upper gear plate interfere with the exiting cable.

Therefore, the existing solution for the wire outgoing mode is to open a hole in the through shaft and lead out the cable to the outside of the hub shell through the hole in the through shaft, so as to avoid interference between the lead-out cable and the clamping mechanism. Although this type of outlet achieves certain results, the following problems are revealed in use:

the larger the power of the existing hub motor is, the larger the coil of the stator part of the corresponding machine core and the outgoing cable thereof need to be, and the larger the outgoing cable needs to enlarge the aperture of the through shaft internal hole, but the increase of the internal aperture directly causes the reduction of the rigidity of the through shaft.

And it is known that the through-shaft section requiring an internal opening is just the through-shaft section required for mounting the load-bearing card-based mechanism, which in itself has a high requirement for rigidity. And once the rigidity is reduced due to the increase of the inner aperture, the support stability of the through shaft on the clamping mechanism and even the whole hub shell and the inner mechanism is inevitably influenced, and the working reliability and the service life of the through shaft hub motor are greatly reduced after the through shaft is used for a long time.

Moreover, based on the current industry standard of electric bicycle production, the section of the through shaft outside the hub shell for bearing the clamping mechanism is not allowed to be thickened, so that the rigidity of the section cannot be ensured by increasing the outer diameter of the through shaft to adapt to the increase of the inner bore of the section, and the section cannot be communicated with the through shaft.

Of course, in the industry, it is also tried to mount the clamping mechanism on the through shaft outside the hub shell on the side where the clutch is located, and then the lead-out cable of the movement can be led out from the opening of the end wall of the hub shell on the same side as the movement, so as to avoid the interference problem between the lead-out cable of the movement and the clamping mechanism. But the following problems are brought about: once the clamping mechanism and the clutch are both positioned at the same end of the through shaft, the mechanism design and assembly are complicated, and the assembly difficulty is greatly improved. And after the outer diameter is increased due to the fact that the clutch and the planetary reduction mechanism are matched with the clamping base mechanism, the radial size of the matched machine core is correspondingly increased, and therefore the size of the whole hub motor is increased, the structure is not compact any more, and the manufacturing cost is improved.

Disclosure of Invention

The utility model discloses the purpose is: the through shaft hub motor with the outgoing line at the clutch end can solve the problem of interference between a core outgoing line cable and a clamping mechanism, effectively avoids the reduction of rigidity of a through shaft section assembled with the clamping mechanism, ensures the working reliability and the service life of the through shaft hub motor, and keeps the characteristics of compact structure and easiness in assembly.

The technical scheme of the utility model is that: a through shaft hub motor with a wire outgoing from a clutch end comprises a through shaft, a hub shell assembled on the through shaft, a machine core, a planetary reduction mechanism and a clutch, wherein the machine core, the planetary reduction mechanism and the clutch are arranged in the hub shell and sequentially connected and assembled along the axial direction of the through shaft; the hub shell is provided with a machine core end shaft hole and a clutch end shaft hole which are respectively used for extending out of two ends of the through shaft; a base clamping mechanism is arranged on a through shaft section extending out of the hub shell through a shaft hole at the end of the machine core; the clutch is characterized in that a lead-out wire hole which extends from the position of the machine core to the direction of the shaft hole at the clutch end and is communicated with the inside and the outside of the hub shell is formed in the through shaft, and the lead-out wire hole is used for guiding a lead-out cable in the hub shell to the outside of the hub shell.

Furthermore, in the utility model, a core end bearing for supporting the through shaft is arranged in the core end shaft hole, and a clutch end bearing for supporting the through shaft is arranged in the clutch end shaft hole; the inlet of the leading-out wire hole on the through shaft is positioned at the position of the movement inside the hub shell, the outlet of the leading-out wire hole is positioned on the section of the through shaft extending out of the hub shell through the clutch end shaft hole, and the leading-out cable sequentially penetrates through the planetary reduction mechanism, the clutch and the clutch end bearing in the leading-out wire hole to reach the outside of the hub shell.

Still further, in the present invention, the outlet is a lateral opening in the section of the through shaft. Compare along the axle center trompil of through-shaft and set up the export at the through-shaft tip, the side direction trompil ensures that the lead-out cable is drawn forth from the side of the through-shaft section of place, can avoid electric bicycle to topple over like this, and the through-shaft tip of through-shaft in-wheel motor lands and crushes by pressure the damage and draws out the cable.

Further, in the utility model discloses in the preferred external rotor internal stator structure of core, the stator is fixed on annular stator support, and the coil on the stator links to each other with drawing forth the cable, and annular stator support is then fixed at logical epaxial, radially is provided with along the core on this annular stator support together the through wires hole that the entry of drawing forth the wire hole links to each other draws forth the cable and passes behind the through wires hole the entry gets into in the wire hole.

Like the conventional technology, the planetary reduction mechanism in the utility model comprises a sun gear and a plurality of planetary gears which are meshed with the sun gear and are distributed in a centrosymmetric way relative to the sun gear, and the planetary gears are simultaneously meshed with a gear ring fixed on the inner periphery of a hub shell; the sun gear and the rotor are fixed or integrally formed, the rotor is assembled on the through shaft through a plurality of rotor bearings, the planetary gear is assembled on the corresponding planetary shaft through a plurality of planetary gear bearings, the planetary shafts are all fixed on the outer ring of the clutch, and the inner ring of the clutch is fixed on the through shaft.

Further, in the utility model discloses in the wheel hub casing comprises concave shell and end cover are fixed, sets up on the concave shell clutch end shaft hole, and sets up on the end cover core end shaft hole, card base mechanism includes card base and card base cover, and the card base passes through a plurality of card base bearing assembly and is leading to epaxially, and the card base cover is established in the periphery of card base to this card base cover periphery is fixed with the end cover, and links to each other through ratchet between interior week and the card base.

Preferably, the planetary gear of the utility model is a nylon gear, and the sun gear is the powder metallurgy gear.

Preferably, in the present invention, the number of the planetary gears is 4.

The utility model has the advantages that:

1) the utility model discloses in offer towards the direction of clutch end to the inside lead-out wire hole of logical axle for the lead-out wire cable of core is from the clutch end guide to the outside of wheel hub casing, thereby avoid drawing the cable on the one hand and interfere with the card base mechanism of assembly on the logical axle district section in the core end wheel hub casing outside, on the other hand need not again to punch in the logical axle district section inside of assembly card base mechanism, the rigidity decline problem of this logical axle district section has been avoided, and then the effectual holistic operational reliability and the life of logical axle in-wheel motor of having ensured.

2) The utility model discloses to the mode that sets up of leading-out wire hole, need not to adopt prior art with clutch and the project organization of card base mechanism in the assembly of wheel hub casing homonymy to still can keep the characteristics of known conventional logical axle in-wheel motor structure compact and easily assembly.

3) The utility model discloses the export of well leading-out wire hole is the side direction trompil, ensures to draw forth the cable and draws forth from the side of place logical axle district section, and when can avoiding electric bicycle to empty like this, logical axle in-wheel motor's logical axle tip touchs down and crushes the damage and draws forth the cable, plays better protection to drawing forth the cable.

Drawings

The invention will be further described with reference to the following drawings and examples:

fig. 1 is a structural section view of the present invention.

Wherein: 1. passing through the shaft; 2. a hub shell; 201. a core end shaft hole; 202. a clutch end shaft hole; 2a, a concave shell; 2b, end covers; 3. leading out a cable; 4. an outlet hole; 5. a movement end bearing; 6. a clutch end bearing; A. a movement; B. a planetary reduction mechanism; C. a clutch; D. a base clamping mechanism; 7. a rotor; 8. a stator; 9. an annular stator support; 10. threading holes; 11. a sun gear; 12. a planetary gear; 13. a rotor bearing; 14. a planetary gear bearing; 15. a planet shaft; 16. an outer ring; 17. an inner ring; 18. a card base; 19. a card base sleeve; 20. a clamp base bearing; 21. a ratchet mechanism; 22. a ring gear.

Detailed Description

Example (b): the following description will be made with reference to fig. 1 for a specific embodiment of the through-shaft hub motor with the clutch end outgoing line provided by the present invention, as follows:

like the prior art, the through-shaft hub motor comprises a through shaft 1, a hub shell 2 assembled on the through shaft 1, and a movement a, a planetary reduction mechanism B and a clutch C (assembled from right to left in fig. 1) which are arranged in the hub shell 2 and sequentially connected and assembled along the axial direction of the through shaft. The hub shell 2 is provided with a movement end shaft hole 201 and a clutch end shaft hole 202 for extending out of two ends of the through shaft 1 respectively, and a clamping mechanism D is installed on a section of the through shaft 1 extending out of the hub shell 2 through the movement end shaft hole 201.

The movement A adopts an outer rotor 7 and inner stator 8 structure, the stator 8 is fixed on an annular stator support 9, a coil on the stator 8 is connected with a lead-out cable 3, and the annular stator support 9 is fixed on the through shaft 1 through a key groove matching structure. The planetary reduction mechanism B includes a

sun gear

11 and 4 planetary gears 12 that are meshed with the sun gear 11 and are distributed centrosymmetrically with respect to the sun gear 11, and these planetary gears 12 are simultaneously meshed with a ring gear 22 fixed on the inner periphery of the hub shell 2; the sun gear 11 is formed integrally with the rotor 7, the rotor 7 being mounted on the through shaft 1 by means of two rotor bearings 13, and the planet gears 12 being mounted on respective planet shafts 15 by means of planet gear bearings 14, these planet shafts 15 being fixed to an outer ring 16 of the clutch C, while an inner ring 17 of the clutch C is fixed to the through shaft 1.

The utility model discloses a core is improved and is opened in logical axle 1 and has by core A department towards clutch end shaft hole 202 direction extension and communicate the lead-out wire hole 4 of 2 inside and outside of wheel hub casing, and this lead-out wire hole 4 is used for leading 2 inside lead-out cables 3 to 2 outsides of wheel hub casing.

And further with reference to fig. 1, in the present embodiment, the movement end shaft hole 201 is provided with a movement end bearing 5 for supporting the through shaft 1, and the clutch end shaft hole 202 is provided with a clutch end bearing 6 for supporting the through shaft 1; the inlet of the outgoing line hole 4 on the through shaft 1 is located at the position of the movement a inside the hub shell 2, while the outlet is located at the section of the through shaft 1 protruding out of the hub shell 2 through the clutch-end shaft hole 202, and the outgoing cable 3 passes through the planetary reduction mechanism B, the clutch C, and the clutch-end bearing 6 in this order inside the outgoing line hole 4 to the outside of the hub shell 2.

And the outlet of the outlet hole 4 is a lateral opening in the section of the through shaft 1. The lateral hole is opened to ensure that the lead-out cable 3 is led out from the side surface of the section of the through shaft 1, so that the lead-out cable 3 can be prevented from being damaged by the pressure of the end part of the through shaft 1 of the through shaft hub motor when the electric bicycle falls down.

Still referring to fig. 1, in this embodiment, a threading hole 10 connected to an inlet of the outgoing line hole 4 is radially disposed on the annular stator bracket 9 along the movement a, and the outgoing cable 3 of the movement a passes through the threading hole 10 and then enters the outgoing line hole 4 through the inlet.

In this embodiment, the hub shell 2 is formed by fixing a concave shell 2a and an end cover 2b, the concave shell 2a is provided with the clutch end shaft hole 202, the end cover 2b is provided with the movement end shaft hole 201, the clamping mechanism D includes a clamping base 18 and a clamping base sleeve 19, the clamping base 18 is assembled on the through shaft 1 through a plurality of clamping base bearings 20, the clamping base sleeve 19 is sleeved on the periphery of the clamping base 18, the periphery of the clamping base sleeve 19 is fixed with the end cover 2b, and the inner periphery is connected with the clamping base 18 through a ratchet mechanism 21.

In this embodiment, the planet gear 12 is a nylon gear, and the sun gear 11 is a powder metallurgy gear.

It should be understood that the above-mentioned embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the content of the present invention and implement the present invention, and the protection scope of the present invention cannot be limited thereby. All modifications made according to the spirit of the main technical scheme of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A through shaft hub motor with a wire outgoing from a clutch end comprises a through shaft (1), a hub shell (2) assembled on the through shaft (1), and a machine core (A), a planetary reduction mechanism (B) and a clutch (C) which are arranged in the hub shell (2) and sequentially connected and assembled along the axial direction of the through shaft, wherein the machine core (A) is provided with a lead-out cable (3); a machine core end shaft hole (201) and a clutch end shaft hole (202) which are respectively used for extending out of two ends of the through shaft (1) are arranged on the hub shell (2); a clamping mechanism (D) is arranged on the section of the through shaft (1) extending out of the hub shell (2) through the axle hole (201) at the end of the machine core; the novel hub is characterized in that an outgoing line hole (4) extending from the position of the machine core (A) to the direction of the clutch end shaft hole (202) and communicated with the inside and the outside of the hub shell (2) is formed in the through shaft (1), and the outgoing line hole (4) is used for guiding the outgoing cable (3) in the hub shell (2) to the outside of the hub shell (2).

2. The through-shaft hub motor of the clutch end outlet according to claim 1, characterized in that a core end bearing (5) supporting the through shaft (1) is installed in the core end shaft hole (201), and a clutch end bearing (6) supporting the through shaft (1) is installed in the clutch end shaft hole (202); the inlet of an outgoing line hole (4) on the through shaft (1) is positioned at the position of a movement (A) in the hub shell (2), the outlet is positioned on the section of the through shaft (1) extending out of the hub shell (2) through a clutch end shaft hole (202), and the outgoing cable (3) sequentially passes through a planetary speed reducing mechanism (B), a clutch (C) and a clutch end bearing (6) in the outgoing line hole (4) to reach the outside of the hub shell (2).

3. A through-shaft hub motor for a clutch-terminated wire according to claim 2, characterised in that the outlet is a lateral opening in the section of the through-shaft (1).

4. The through shaft hub motor of the clutch end outgoing line according to claim 2 or 3, characterized in that the core (A) is of an outer rotor (7) and inner stator (8) structure, the stator (8) is fixed on an annular stator bracket (9), a coil on the stator (8) is connected with the outgoing line cable (3), the annular stator bracket (9) is fixed on the through shaft (1), a threading hole (10) which is connected with an inlet of the outgoing line hole (4) is radially arranged on the annular stator bracket (9) along the core (A), and the outgoing line cable (3) passes through the threading hole (10) and then enters the outgoing line hole (4) through the inlet.

5. The clutch end outlet through-axis hub motor of claim 4, wherein

The planetary speed reducing mechanism (B) comprises a sun gear (11) and a plurality of planetary gears (12) which are meshed with the sun gear (11) and are distributed in a centrosymmetric way relative to the sun gear (11), and the planetary gears (12) are simultaneously meshed with a gear ring (22) fixed on the inner periphery of the hub shell (2); the sun gear (11) and the rotor (7) are fixed or integrally formed, the rotor (7) is assembled on the through shaft (1) through a plurality of rotor bearings (13), the planet gear (12) is assembled on the corresponding planet shaft (15) through a plurality of planet gear bearings (14), the planet shafts (15) are all fixed on an outer ring (16) of the clutch (C), and an inner ring (17) of the clutch (C) is fixed on the through shaft (1).

6. The through-shaft hub motor of the clutch-terminated wire outlet according to claim 1 or 2, characterized in that the hub shell (2) is fixedly formed by a concave shell (2 a) and an end cover (2 b), the concave shell (2 a) is provided with the clutch-end shaft hole (202), the end cover (2 b) is provided with the core-end shaft hole (201), the clamping mechanism (D) comprises a clamping base (18) and a clamping base sleeve (19), the clamping base (18) is assembled on the through shaft (1) through a plurality of clamping base bearings (20), the clamping base sleeve (19) is sleeved on the periphery of the clamping base (18), the periphery of the clamping base sleeve (19) is fixed with the end cover (2 b), and the inner periphery is connected with the clamping base (18) through a ratchet mechanism (21).

7. The clutch-terminated through-axis hub motor according to claim 5, characterized in that the planet gear (12) is a nylon gear and the sun gear (11) is a powder metallurgy gear.

8. A through-shaft hub motor of the clutch terminated line according to claim 5, characterized in that the number of planetary gears (12) is 4.