CN2417627Y - Speed adjustable, permanent magnet, out rotator and wheel tyre type dc motor with self-rotating carbon brush used for driving electric bicycle - Google Patents

Abstract

The utility model belongs to the technical field of direct current motors. Self-rotating carbon brushes (20) which are controlled by ratchet pawls (12), centrifugal columns (11) and centrifugal column springs (13) can be moved relative to a fixed and nonrotating reverser (19) with a built-in end surface, so that input direct current can be changed into alternating current which is sent to a fixed armature winding (18), and a rotational magnetic field and electromagnetic torque can be generated; accordingly, a wheel tyre (16) of an out rotator of an Nd-Fe-B permanent magnet pole can be pushed to rotate according to the rotational speed of the self-rotating carbon brushes (20). The utility model has the advantages of simple structure and reliable work; the utility model also has the advantages that the cost is lower than 1/3 of the cost of various permanent magnetic wheel tyre direct current motors which are produced in China at present, and the cost can be greatly reduced. The utility model is beneficial for popularizing pollution-free and low-noise electric bicycles of an environmental protection type.

Description

Electric bicycle rotation carbon brush speed governing permanent-magnetic outer rotor rim direct current machine

The utility model belongs to the dc motor technology field.

The electric bicycle of existing domestic production is with there being carbon brush permanent magnetism rim direct current machine also must be furnished with mechanical reduction and complicated Electronic starting governing system, and fault is many, and positive machine cost is too high; And advanced brush-less permanent magnetic rim direct current machine, because its complex structure and expensive electronic position sensor-based system, electronic commutation system and Electronic starting governing system make its positive machine cost higher, fault is also many.

The purpose of this utility model provides a kind of reliable operation simple in structure, and can realize the permanent magnetism rim direct current machine that smooth starting stepless speed regulation cost is low.

The technical solution of the utility model be under the fixed armature winding (18) in fixed armature iron core (17) is smart with after the corresponding commutator segment of built-in end-surface type commutator (19) links to each other, cement in one heart together with insulating adhesive material, its internal diameter is loaded onto commutator jump ring (23) after being fixed on fixed axis (28) centre with commutator key (24).Positive and negative each rotation carbon brush (20) of device on the right large end face of pawl disk axle (2), two rotation carboloy holders (22) and two rotation carbon brush springs (21); Right big end external diameter two ratchets of first-class distance means (12) of pawl disk axle (2) are adorned two centrifugal posts (11) and two centrifugal post springs (13) in ratchet (12) center faces toward the back of holing on the line in the center of circle; The center line of the center line of one of them rotation carbon brush (20) and one of them ratchet (12) two pole spans of being separated by; Install flywheel (5) slip ring key (3) slip ring (4) on the external diameter of pawl disk axle (2) left side, the twice conducting ring of slip ring (4) links to each other with positive and negative rotation carbon brush (20) respectively; The right-hand member device slip ring bearing (10) of slip ring (4), the external diameter of slip ring bearing (10) is contained in the internal diameter of end cap (15); Positive and negative conduction carbon brush (6) conduction carbon brush spring (7) conduction carbon brush disjunctor brush carrier (9) on the slip ring (4) is fixed on the brush holder support (8), and brush holder support (8) is fixed on the electric bicycle frame; Pawl disk axle (2) internal diameter is equipped with two dish bearings (1), and bearing (1) internal diameter is assemblied in fixed axis (28) left side; The flywheel (5) on the pawl disk axle (2) and the chain of electric bicycle link to each other; The right big end external diameter and end cap (15) internal diameter of pawl disk axle (2) whenever have 1 millimeter gap.Processing and ratchet (12) cooperation separate 8 synchronous ratchets (14) that equidistantly distribute that block on the internal diameter of the corresponding end cap in center (15) of 8 N utmost points on the Nd-Fe-B permanent magnetic pole external-rotor rim (16) (or the S utmost point, the given number of pole-pairs of design).End cap (15) and Nd-Fe-B permanent magnetic pole external-rotor rim (16) are fixed together with one heart.Respectively there is an emission rate cylindrical void Nd-Fe-B permanent magnetic pole external-rotor rim (18) cylindrical both sides, internal diameter device one plate wheel hoop bearing (26), and rim bearing (28) internal diameter is assemblied in the right side of fixed axis (28); The yoke of casting together and 8 pairs of Nd-Fe-B permanent magnetic steel of cementation are arranged on the Nd-Fe-B permanent magnetic pole external-rotor rim (16).

Nd-Fe-B permanent magnetic rotor rim (16) is gone up width of cloth cylindrical void to be loaded onto on the position of the driving trailing wheel that is contained in electric bicycle behind the width of cloth bar steel ring Tire ﹠ Tube, when driving electric bicycle, earlier foot-operatedly drive driving-chain and when driving flywheel (5) and rotating, also drive pawl disk axle (2) together, slip ring (4), ratchet (12), centrifugal post (11), centrifugal post spring (13) rotation carbon brush (20) rotation carbon brush spring (21) carboloy holder (22) automatically rotates, because two ratchets (12) are blocking on the end cap (15) certain two with tooth papillae tooth (14) under the effect of the centrifugal post of centrifugal post spring (13) (11), so end cap (15) Nd-Fe-B permanent magnetic pole external-rotor rim (16) also rotates together, make the electric bicycle walking, finished starting.This moment is by conducting electricity carbon brush (6) slip ring (4) to rotation carbon brush (20) input dc power, the relative motion of rotation carbon brush (20) and built-in end-surface type commutator (19) makes direct current become alternating current and flows to fixed armature winding (18) generation rotating magnetic field, electromagnetic torque, promote the rotating speed rotation of Nd-Fe-B permanent magnetic pole external-rotor rim (16), make the electric bicycle walking by rotation carbon brush (20).When foot-operated drive flywheel (5) the pawl disk axle (2) of accelerating, when the centrifugal post spring of the centrifugal post of slip ring (4) ratchet (12) (11) (13) rotation carbon brush (20) rotation carbon brush spring (21) rotation carboloy holder (22) turns to 100 rev/mins of (design given rotating speed) left and right sides, the centrifugal force that the centrifugal post spring of centrifugal post (11) (13) obtains makes ratchet (12) can not separate with synchronous ratchet (14), Nd-Fe-B permanent magnetic pole external-rotor rim this moment (16) drive rotation carbon brush (20) rotates synchronously and makes rotating speed be raised to 180 rev/mins (design rated speeds), stop to ride, finished speed governing to rated speed.

The utility model adopts rated power 160W, rated voltage 36V, rated current 4.5A, 180 rev/mins 8 pairs Nd-Fe-B permanent magnetic utmost point direct current machines of rated speed.

The utility model is simple in structure, reliable operation, starting governing system of being made up of rotation carbon brush (20) and the built-in end-surface type commutator (19) that maintains static and direct current machine are in one, and its cost is that about 1/3rd of brush permanent magnetism rim direct current machine and Electronic starting speed control device cost arranged; Be brush-less permanent magnetic rim direct current machine and electronic position sensor-based system, electronic commutation system, about 1/5th of Electronic starting governing system cost.Owing to reduced cost significantly, helped popularization pollution-free, low noise environmental-protecting type electric bicycle.

Fig. 1 in the Figure of description is the assembling front view that partly cuts open of the present utility model.Part sequence number among Fig. 1 is as follows: bearing (1), pawl disk axle (2), slip ring key (3), slip ring (4), flywheel (5), conduction carbon brush (6), conduction carbon brush spring (7), brush holder support (8), conduction carbon brush disjunctor brush carrier (9), slip ring bearing (10), centrifugal post (11), ratchet (12), centrifugal post spring (13), synchronous ratchet (14), end cap (15), Nd-Fe-B permanent magnetic pole external-rotor rim (16), fixed armature iron core (17), fixed armature winding (18), built-in end-surface type commutator (19), rotation carbon brush (20), rotation carbon brush spring (21), rotation carboloy holder (22), commutator jump ring (23), commutator key (24), wave washer (25), rim bearing (26), nut (27), fixed axis (28).

Fig. 2 is pawl disk axle (2) and rotation carbon brush (20), rotation carbon brush spring (21), the front view of the centrifugal post of the centrifugal post spring of rotation carboloy holder (22) (13) (11) ratchet (12) and A-A cutaway view.

Fig. 3 is the main cutaway view and the left view of slip ring.

Fig. 4 is built-in end-surface type commutator (19) and fixed armature iron core (17), the left view of fixed armature winding (18).

Claims (1)

1, a kind of permanent magnetism rim direct current machine comprises housing, permanent-magnet pole, armature core, armature winding, commutator, carbon brush, brush carrier, bearing, axles etc. is characterized in that under the fixed armature winding (18) in fixed armature iron core (17) groove with after the corresponding commutator segment of built-in end-surface type commutator (19) links to each other, cement in one heart together with insulating adhesive material, its internal diameter is loaded onto commutator jump ring (23) after being fixed on fixed axis (28) centre with commutator key (24).Positive and negative each rotation carbon brush (20) of device on the right large end face of pawl disk axle (2), two rotation carboloy holders (22) and two rotation carbon brush springs (21); Right big end external diameter two ratchets of first-class distance means (12) of pawl disk axle (2) are adorned two centrifugal posts (11) and two centrifugal post springs (13) in ratchet (12) center faces toward the back of holing on the line in the center of circle; The center line of the center line of one of them rotation carbon brush (20) and one of them ratchet (12) two pole spans of being separated by; Install flywheel (5) slip ring key (3) slip ring (4) on the external diameter of pawl disk axle (2) left side, the twice conducting ring of slip ring (4) links to each other with positive and negative rotation carbon brush (20) respectively; The right-hand member device slip ring bearing (10) of slip ring (4), the external diameter of slip ring bearing (10) is contained in the internal diameter of end cap (15); Positive and negative conduction carbon brush (6) conduction carbon brush spring (7) conduction carbon brush disjunctor brush carrier (9) on the slip ring (4) is fixed on the brush holder support (8), and brush holder support (8) is fixed on the electric bicycle frame; Pawl disk axle (2) internal diameter is equipped with two dish bearings (1), and bearing (1) internal diameter is assemblied in fixed axis (28) left side; The flywheel (5) on the pawl disk axle (2) and the chain of electric bicycle link to each other; The right big end external diameter and end cap (15) internal diameter of pawl disk axle (2) leave 1 millimeter gap.Processing and ratchet (12) cooperation separate 8 synchronous ratchets (14) that equidistantly distribute that block on the internal diameter of the corresponding end cap in center (15) of 8 N utmost points on the Nd-Fe-B permanent magnetic pole external-rotor rim (16) (or the S utmost point, the given number of pole-pairs of design).End cap (15) and Nd-Fe-B permanent magnetic pole external-rotor rim (16) are fixed together with one heart.Respectively there is an emission rate cylindrical void Nd-Fe-B permanent magnetic pole external-rotor rim (16) cylindrical both sides, internal diameter device one plate wheel hoop bearing (26), and rim bearing (26) internal diameter is assemblied in the right side of fixed axis (28); The yoke wheel of casting together and 8 pairs of Nd-Fe-B permanent magnetic steel of cementation are arranged on the Nd-Fe-B permanent magnetic pole external-rotor rim (16).

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