CN208862663U - A kind of rotor assembly and the protected type pump motor using it - Google Patents

Abstract

The utility model discloses a kind of rotor assembly and using its protected type pump motor, including water proof set and end cap, water proof set is tubular construction, the engaging lug for connecting with end cap is provided at the close open end of water proof set, engaging lug has the first joint face, several first boss are provided on first joint face, also, the first fitting surface by proximal cover of first boss is higher than first joint face；The end cap has the second fitting surface, is mounted on the second fitting surface of end cap at the first boss of water proof set by fastener, and the first fitting surface and the second fitting surface cooperate.The utility model is additionally arranged several first boss on the first joint face of engaging lug, it can simply guarantee the concentricity of water proof set with upper bearing (metal) and lower bearing after end cap assembly, even if the gap of upper and lower bearing and motor shaft is small, also it can guarantee and run smooth between motor shaft and upper and lower bearing, avoid vibration and shock between motor shaft and bearing.

Description

A kind of rotor assembly and the protected type pump motor using it

Technical field

The utility model relates to a kind of rotor assembly and using its protected type pump motor, belong to technical field of motors.

Background technique

Automobile industry is grown rapidly, more reliable as automotive performance is towards safer, more stable, intelligent and environmental protection section Energy direction is developed, and electronic water pump is largely applied in vehicular hot pipe reason system, and is well positioned to meet the requirement in market.Electronics Shielding structure in pump motor gradually substitutes non-shielded structure since high-efficient, the service life is high, compact-sized.

Shielding structure refers to, water proof set is arranged between rotor and stator, and rotor directly drives impeller, drives pump work. In order to guarantee the sealing effect of water proof set, water proof set closed at one end open at one end is generallyd use, rotor is mounted in water proof set, End cap is mounted on water proof set open end, and motor-shaft extending goes out end cap and connect with impeller, and the metal (upper of motor shaft is separately mounted to hold At lid and water proof set closed end.Water proof set is generally injection molding after plastic pellet melting, will necessarily shrink after cooling and shaping Deformation, the flatness precision for necessarily causing water proof to cover the first fitting surface assembled with end cap is not high, and the first assembly of water proof set The plane precision in face is difficult to control again, when assembling with end cap, will lead to down if the first fitting surface flatness difference of water proof set The concentricity of bearing and upper bearing (metal) is poor, and centre bore offset causes rotor to seize up.In order to guarantee that rotor operation is smooth, motor Gap between axis and bearing is larger, brings vibration between axis and bearing, shock amount big, and vibration conference accelerates the mill of shafting Damage, service life reduction.

Utility model content

The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a kind of rotor assembly and Using its protected type pump motor, to solve the problems, such as that water proof set is steadily assembled with end cap.

In order to solve the above-mentioned technical problem, the technical solution of the utility model is: a kind of rotor assembly, including water proof set and End cap,

Water proof set is tubular construction, and water proof set has open end and closed end, sets at the close open end of the water proof set It is equipped with the engaging lug for connecting with end cap, engaging lug has the first joint face, is provided with several on first joint face First boss, also, first boss is higher than first joint face axially closer to the first fitting surface of end cap；

The end cap has the second fitting surface, and the first boss of water proof set is mounted on the second assembly of end cap by fastener On face, and the first fitting surface and the second fitting surface cooperate.

Further, the first boss and the engaging lug integrated injection molding, the height L of first boss are less than or equal to 5mm, the first boss are cylinder, and the outer diameter R of first boss is less than or equal to the width W of the first joint face.

Further, it is sealed between the water proof set and end cap by the first sealing ring.

Further, this rotor assembly further includes upper bearing (metal) and lower bearing, and the middle part of the end cap covers internal stretch to water proof, It is provided with first bearing room, first bearing room carries the upper bearing (metal) for installing, at water proof set inside, closed end It is provided with second bearing room, second bearing room carries the lower bearing for installing, and upper bearing (metal) and lower bearing are separately mounted to the In one bearing chamber, second bearing room, multiple second boss are distributed along the circumference on the inner wall of second bearing room, second bearing room is logical It crosses second boss and supports the lower bearing.

Further, it is additionally provided with link slot on the inner wall of the second bearing room, for being connected to second bearing room and water proof The internal cavity of set.

Further, the lower bearing and second bearing room are clearance fit, are arranged on the periphery wall of lower bearing for putting The groove of the second sealing ring is set, the second sealing ring is installed in groove, in the groove of lower bearing after the second sealing ring of installation, second Sealing ring and the internal perisporium of second bearing room are interference fitted.

Further, this rotor assembly further includes the rotary body being set to inside water proof set, and rotary body includes rotor core, magnetic Body, motor shaft and injection molding body, magnet are pasted onto rotor core periphery, and motor shaft is supported jointly by upper bearing (metal) and lower bearing, note Plastomer for it is fully wrapped around live rotor core and rotor core on the outside of magnet, also, motor shaft through rotor core and External injection molding body.

Further, it is equipped at the cooperation of the motor shaft and rotor core and chooses muscle or annular knurl.

Further, the rotor core is formed by steel material overall processing, and rotor core is equipped with penetration type through-hole, is passed through The direction for wearing formula through-hole is parallel with motor shaft, and injection molding body includes the wrapping layer for being set to periphery, and is wholely set with wrapping layer , through portion in the penetration type through-hole for extending to rotor core.

The utility model additionally provides a kind of protected type pump motor, including the rotor assembly.

After above-mentioned technical proposal, the utility model has the following beneficial effects:

1) the utility model is additionally arranged several first boss on the first joint face of engaging lug, can simply guarantee The concentricity of water proof set and upper bearing (metal) and lower bearing after end cap assembly can also protect even if the gap of upper and lower bearing and motor shaft is small It runs smooth between card motor shaft and upper and lower bearing, vibration and shock between motor shaft and bearing is avoided, to reduce shafting Abrasion, substantially increases product qualification rate with the water pump service life.

2) between second bearing room and lower bearing, the same principle using the matching area for reducing the two is reduced to the second axis The cylindricity requirement for holding indoor peripheral wall, adds second boss on the internal perisporium of second bearing room, passes through second boss and lower axle Cooperation is held, convenient for the processing of second bearing room, mores easily guarantee the concentricity of lower bearing and upper bearing (metal).

3) link slot is added on the inner wall of second bearing room, for being connected to the internal cavity of second bearing room and water proof set, To guarantee that the intracorporal medium of inner chamber of water proof set can smoothly enter in second bearing room by link slot, guarantee lower bearing Medium can be come into full contact between motor shaft and plays lubricating action, additionally it is possible to which the smooth operation for guaranteeing motor shaft and lower bearing has Conducive to noise-reducing, the service life is improved.

Detailed description of the invention

Fig. 1 is the overall structure diagram of the rotor assembly of the utility model；

Fig. 2 is the explosive view of the rotor assembly of the utility model；

Fig. 3 is the perspective view that the water proof of the utility model covers；

Fig. 4 is the main view that the water proof of the utility model covers；

Fig. 5 is that the water proof of the utility model covers schematic diagram of internal structure；

Fig. 6 is the perspective view of the end cap of the utility model；

Fig. 7 is the front sectional view of the rotor assembly of the utility model；

Fig. 8 is the portion the A partial enlarged view of Fig. 7；

Fig. 9 is the front sectional view that the water proof of the utility model covers；

Figure 10 is the front sectional view of the lower bearing of the utility model；

Figure 11 is the installation diagram that the second sealing ring is installed outside lower bearing；

Figure 12 is the perspective view of the rotary body of the utility model；

Figure 13 is the front sectional view of the rotary body of the utility model；

Figure 14 is the installation diagram of the motor shaft of the utility model, rotor core and magnet；

Figure 15 is the cross-sectional view of the injection molding body of the utility model.

Specific embodiment

In order to make the content of the utility model be easier to be clearly understood, below according to specific embodiment and combine attached Figure, is described in further detail the utility model.

Unless not defining, the technical term or scientific term used herein is should be in the utility model fields The ordinary meaning that personage with general technical ability is understood.Used in the utility model patent specification and claims " first ", " second " and similar word are not offered as any sequence, quantity or importance, and are used only to distinguish different Component part.Equally, the similar word such as "one" or " one " does not indicate that quantity limits yet, but indicates there is at least one It is a.

As shown in Fig. 1 to Figure 15, a kind of rotor assembly, including water proof set 4 and end cap 3.

Water proof set 4 is tubular construction, and water proof set 4 has open end and closed end, and the water proof covers at 4 close open end It is provided with the engaging lug 41 for connecting with end cap 3, engaging lug is specifically to put down along what water proof set outer peripheral surface extended radially outwardly Platform structure, engaging lug 41 have the first joint face 42, and the first joint face 42 is the side by proximal cover 3 on engaging lug 41, this Utility model is provided with several first boss 43 on first joint face 42, and the present embodiment is to be arranged three first boss For 43, the quantity of first boss 43 can suitably be increased and decreased according to actual needs.First boss 43 axially closer to end cap 3 The first fitting surface 44 be higher than first joint face 42, also, the first fitting surface 44 be used for and on end cap 3 second assembly Face 31 is cooperatively connected；

The end cap 3 has the second fitting surface 31, is provided with pilot hole 32, the first boss on the second fitting surface 31 43 are arranged in a one-to-one correspondence with the pilot hole 32 on the second fitting surface 31, water proof set 4 first boss 43 by fastener (such as Screw) it is connect with the pilot hole 32 on the second fitting surface 31 of end cap 3.After 4 assembly of end cap 3 and water proof set, the first fitting surface 44 It cooperates with the second fitting surface 31, instead of in the prior art, passes through the second fitting surface 31 of the first joint face and end cap 3 Cooperate the connection structure assembled.Since the Shooting Technique of water proof set 4 is it is difficult to ensure that the plane whole in the first joint face 42 Inevitably there is the problem of the two connection loosens after end cap 3 is with water proof 4 assembly of set in degree, causes to be mounted on end cap 3 and water proof set 4 On a pair of bearings (i.e. described below upper bearing (metal) 2 and lower bearing 6) disalignment.

The utility model is by the fit system of water proof set 4 and end cap 3 by entire first joint face 42 and the second fitting surface 31 Contact is improved to contact by 43 part of first boss with the second fitting surface 31.Since the area of fitting surface is smaller, flatness is got over It is easily guaranteed that, therefore the utility model uses with several first boss 43 and end cap 3, passes through the first of first boss 43 31 snug fit of the second fitting surface of fitting surface 44 and end cap 43, it is easier to guarantee the center line of water proof set and the second dress of end cap Verticality with face reduces the requirement of the machining accuracy to the first joint face 42 on water proof set 4, is not improving water proof set 4 Injection molding precision it is preceding under, still be able to produce the water proof for meeting matching requirements set 4.The utility model is in engaging lug 41 It is additionally arranged several first boss 43 on first joint face 42, can simply guarantee water proof set 4 and upper bearing (metal) after the assembly of end cap 3 2 and lower bearing 6 concentricity, even if the gap of upper and lower bearing and motor shaft is small, also can guarantee motor shaft and upper and lower bearing it Between run smooth, avoid vibration and shock between motor shaft and bearing, to reduce shafting abrasion, substantially increase product conjunction Lattice rate is with the water pump service life.

The first boss 43 and 41 integrated injection molding of engaging lug, the height L of first boss 43 are less than or equal to 5mm.The first boss 43 is cylinder, and the outer diameter R of first boss (43) is less than or equal to the width W of the first joint face 42. The a part of first boss 43 as engaging lug 41 should not exceed the range where the first joint face 42, avoid and other zero Part generates interference.Fig. 3 shows the relative positional relationship of first boss 43 Yu engaging lug 41.

It is sealed between the water proof set 4 and the end cap 3 by the first sealing ring 5.Specifically, the opening of water proof set 4 It is equipped with connecting pin at end, the first sealing ring 5 is installed between end cap on the outside of connecting pin, water proof set 4 is logical in circumferencial direction with end cap 4 It crosses the first sealing ring 5 to be sealed, guarantees that the interior media of water proof set 4 will not penetrate into stationary part, ensure that stationary part Electrical safety, guarantee the service life of motor.First sealing ring 5 is preferably O-ring seal.

This rotor assembly further includes upper bearing (metal) 2 and lower bearing 6, and the middle part of the end cap 3 covers 4 internal stretches to water proof, On be provided with first bearing room 33, first bearing room 33 carries the upper bearing (metal) 2 for installing, inside the water proof set 4, envelope Second bearing room 45 is provided at closed end, second bearing room 45 carries the lower bearing 6, upper bearing (metal) 2 and lower bearing 6 for installing It is separately mounted to first bearing room 33, in second bearing room 45.Multiple are distributed along the circumference on the inner wall of second bearing room 45 Two boss 46, second bearing room 45 support the lower bearing 6 by second boss 46.Between second bearing room 45 and lower bearing 6, The same principle using the matching area for reducing the two reduces the cylindricity requirement to 45 internal perisporium of second bearing room, in the second axis It holds and adds second boss 46 on the internal perisporium of room 45, cooperated by second boss 46 and lower bearing 6, convenient for second bearing room 45 Processing, mores easily guarantee the concentricity of lower bearing 6 Yu upper bearing (metal) 2.

As a preferred embodiment, it is additionally provided with link slot 47 on the inner wall of the second bearing room 45, for being connected to the The internal cavity of two bearing chambers 45 and water proof set 4, to guarantee that the intracorporal medium of inner chamber of water proof set 4 can by link slot 47 To smoothly enter in second bearing room 45, medium can be come into full contact with by guaranteeing between lower bearing 6 and motor shaft 71 plays lubrication work With, additionally it is possible to the smooth operation for guaranteeing motor shaft 71 Yu lower bearing 6 is conducive to noise-reducing, improves the service life.

Fig. 9,10,11 show the assembly relation of lower bearing 6 Yu second bearing room 45.The outer diameter of lower bearing 6 is φ 1, the The internal diameter of two bearing chambers 45 is φ 2, and 2 > φ 1 of φ, lower bearing 6 and second bearing room 45 are clearance fit.In the outer of lower bearing 6 Setting is equipped with the second sealing ring 1, the second sealing ring 1 in groove 61 for placing the groove 61 of the second sealing ring 1 on peripheral wall Installation is to after in the groove 61 of lower bearing 6, and outer diameter of the lower bearing at the second sealing ring 1 is φ 3 at this time, φ 3 > φ 2, and second Sealing ring 1 and the internal perisporium of second bearing room 45 are interference fitted.The second sealing ring 1 is added on the periphery wall of lower bearing 6, it can be with The internal perisporium of second bearing room 45 forms interference compression assembly, and the second sealing ring 1 is preferably O-ring seal.Since sealing ring is big Rubber soft materials are mostly used, flexible cooperation are formed between lower bearing 6 and second bearing room 45, when upper and lower bearing concentricity is inclined When the larger rotary body 7 (rotary body 7 i.e. described below) that causes to be installed between upper and lower bearing of difference is stuck, 6 meeting of lower bearing Position adjustment is voluntarily carried out, to guarantee that rotary body 7 smooth can be run.

This rotor assembly further includes the rotary body 7 being set to inside water proof set 4, and rotary body 7 includes rotor core 74, magnet 73, motor shaft 71 and injection molding body 72, magnet 73 are pasted onto 74 periphery of rotor core, and motor shaft 71 is by upper bearing (metal) 2 and lower bearing 6 Common bearing, magnet 73 of the injection molding body 72 for 74 outside of fully wrapped around firmly rotor core 74 and rotor core, also, motor Injection molding body 72 of the axis 71 through rotor core 74 and outside.Injection molding body 72 can guarantee that the medium in water proof set 4 will not enter Corrode magnet 73 and rotor core 74 inside injection molding body 72, insulation blocking is carried out to magnet 73 and rotor core 74.Rotary body 7 In injection molding, the end face that the prior art passes through rotor core mostly is limited, and can have limit hole after primary injection molding, exposure Iron core causes to get rusty, and needs rotary body carrying out quadric injection mould to complete plastic iron core.The present embodiment, which preferably uses, passes through electricity The end face of 71 one end of arbor carries out axial limiting in a mold, avoids forming limit hole on the end faces of the rotor core, thus will Rotor core 74 and magnet 73 are completely encapsulated in injection molding body 72, realize single injection-molded.

The rotor core 74 is formed by steel material overall processing, for example, directly machined using monoblock type 45# steel and At unitary rotor iron core solves in conventional silicon-steel piece rotor structure, remaining gas and grease stain when tinertoy between piece and piece Equal substances, when progress surface is plastic since material temperature is high, the impurity such as internal rotor gas or grease stain are heated at high temperature is excluded, Easily cause to be molded bad such as trapped gas, burn, welding it is bad, influence product qualification rate.Rotor core 74 is equipped with penetration type The direction of through-hole 75, penetration type through-hole 75 is parallel with motor shaft 71, and injection molding body 72 includes the wrapping layer 721 for being set to periphery, with And the through portion 722 in the penetration type through-hole 75 being wholely set with wrapping layer 721, extending to rotor core 74.Injection molding When, injection molding material can enter in penetration type through-hole 75, form through portion 722, increase the integral strength and leakproofness of structure after injection molding Energy.Rotor core 74 can be equipped with chamfering 76 or deep gouge in circumferencial direction.

It is equipped at the motor shaft 71 and the cooperation of rotor core 74 and chooses muscle or annular knurl 77, rotor core when guaranteeing injection molding 74, which will not be injection molding shooting impact, generates displacement, causes the end face of rotor core 74 to contact with mold and iron core end face is caused to leak outside.

A kind of protected type pump motor, including above-mentioned rotor assembly.

Particular embodiments described above, to the utility model solve the technical issues of, technical scheme and beneficial effects into It has gone further description, it should be understood that the foregoing is merely specific embodiment of the utility model, and has not had to In limitation the utility model, within the spirit and principle of the utility model, any modification, equivalent substitution and improvement done Deng should be included within the scope of protection of this utility model.

Claims (10)

1. a kind of rotor assembly, it is characterised in that: including water proof set (4) and end cap (3),

Water proof set (4) is tubular construction, and water proof set (4) has open end and closed end, the close open end of the water proof set (4) Place is provided with the engaging lug (41) for connecting with end cap (3), and engaging lug (41) has the first joint face (42), and described first connects Several first boss (43) are provided in junction (42), also, first boss (43) is axially closer to the first dress of end cap (3) It is higher than first joint face (42) with face (44)；

The end cap (3) has the second fitting surface (31), and the first boss (43) of water proof set (4) is mounted on end cap by fastener (3) on the second fitting surface (31), and the first fitting surface (44) and the second fitting surface (31) cooperate.

2. rotor assembly according to claim 1, it is characterised in that: the first boss (43) and the engaging lug (41) Integrated injection molding, the height L of first boss (43) are less than or equal to 5mm, and the first boss (43) is cylinder, and first is convex The outer diameter R of platform (43) is less than or equal to the width W of the first joint face (42).

3. rotor assembly according to claim 2, it is characterised in that: by the between the water proof set (4) and end cap (3) One sealing ring (5) sealing.

4. rotor assembly according to claim 1, it is characterised in that: it further include upper bearing (metal) (2) and lower bearing (6), it is described The middle part of end cap (3) is provided with first bearing room (33) to water proof set (4) internal stretch, and first bearing room (33) are used for Installation carries the upper bearing (metal) (2), is provided with second bearing room (45), second bearing at water proof set (4) inside, closed end Room (45) carries the lower bearing (6) for installing, upper bearing (metal) (2) and lower bearing (6) be separately mounted to first bearing room (33), In second bearing room (45), multiple second boss (46), second bearing are distributed along the circumference on the inner wall of second bearing room (45) Room (45) supports the lower bearing (6) by second boss (46).

5. rotor assembly according to claim 4, it is characterised in that: also set up on the inner wall of the second bearing room (45) There are link slot (47), for being connected to the internal cavity of second bearing room (45) Yu water proof set (4).

6. rotor assembly according to claim 5, it is characterised in that: the lower bearing (6) is with second bearing room (45) Clearance fit, for placing the groove (61) of the second sealing ring (1), groove (61) is interior for setting on the periphery wall of lower bearing (6) Be equipped with the second sealing ring (1), in the groove (61) of lower bearing (6) after installation the second sealing ring (1), the second sealing ring (1) with The internal perisporium of second bearing room (45) is interference fitted.

7. rotor assembly according to claim 6, it is characterised in that: further include being set to the internal rotation of water proof set (4) Body (7), rotary body (7) include rotor core (74), magnet (73), motor shaft (71) and injection molding body (72), and magnet (73) is viscous It is attached to rotor core (74) periphery, motor shaft (71) is supported jointly by upper bearing (metal) (2) and lower bearing (6), and injection molding body (72) is used for Magnet (73) on the outside of fully wrapped around firmly rotor core (74) and rotor core (74), also, motor shaft (71) runs through rotor Iron core (74) and the injection molding body (72) of outside.

8. rotor assembly according to claim 7, it is characterised in that: the motor shaft (71) is matched with rotor core (74) It is equipped at conjunction and chooses muscle or annular knurl (77).

9. rotor assembly according to claim 8, it is characterised in that: the rotor core (74) is integrally added by steel material Work forms, and rotor core (74) is equipped with penetration type through-hole (75), and the direction of penetration type through-hole (75) is parallel with motor shaft (71), Injection molding body (72) includes the wrapping layer (721) for being set to periphery, and be wholely set with wrapping layer (721), extend to rotor Through portion (722) in the penetration type through-hole (75) of iron core (74).

10. a kind of protected type pump motor, it is characterised in that: including rotor assembly as described in any one of claim 1 to 9.