CN209896861U

CN209896861U - Electric motor

Info

Publication number: CN209896861U
Application number: CN201921020070.8U
Authority: CN
Inventors: 吴能建
Original assignee: Yourui Fuzhou Power Manufacturing Co Ltd
Current assignee: Yourui Fuzhou Power Manufacturing Co Ltd
Priority date: 2019-07-03
Filing date: 2019-07-03
Publication date: 2020-01-03
Anticipated expiration: 2029-07-03

Abstract

The motor includes rotor, stator, casing, fan and rotating shaft, the rotor is covered outside the rotating shaft, the stator is fixed in the casing, the main points are that the casing is composed of front end body and back end body, the front and back end bodies are formed by punching steel plate, the two are opened and connected, the centers of the closed ends of the front and back end bodies are punched with bearing mounting holes, the rotating shaft is fixed in the central bearing mounting holes at the bottom of the front and back end bodies through bearings. The utility model discloses a change the structural component of shell, with original front end housing, the organism, the component structure improvement of rear end cap triplex is the front end body, rear end body two parts, and form by the steel sheet punching press, improve shell strength, avoided the casting, the inherent defect that die casting technology brought, reduce complete machine weight, reduce the surplus and the work load of follow-up machining, reduce manufacturing cost, whole manufacture simple, high efficiency, with the fan dress in the shell inner chamber, the fan directly cools off stator and shell, the cooling effect is good.

Description

Electric motor

Technical Field

The utility model belongs to a motor.

Background

As shown in fig. 1, 2, 3, and 4, the conventional motor mainly includes a rotor 5, a stator 6, a housing 1, a fan 8, and a rotating shaft 2, where the housing 1 is formed by sequentially connecting a front end cover 11, a body 12, and a rear end cover 13, two ends of the rotating shaft are respectively fixed to the front and rear end covers through bearings 4, a heat dissipating rib 121 is designed on the surface of the body 12, the fan is fixed to an outer end of the rear end cover, an air outlet 141 cools the heat dissipating rib 121, the fan is protected by a blade shield 81, the blade shield is fixed to the rear end cover, and an air inlet 151 is formed at a rear end of the blade shield. The shell is made of cast iron for decades, the thickness of the shell needs to be increased to ensure strength due to the fact that the cast iron material is brittle, the weight of the machine body and the front end cover and the rear end cover accounts for half of the weight of the whole machine, aluminum alloy die-casting is adopted to reduce the weight, the casting and die-casting are high in energy consumption and high in pollution, the fan at the tail of the existing motor cools the machine body, and the shell is affected by heat insulation of paint due to the fact that the shell is coated with primer and finish paint, and the cooling effect is poor. After casting, sand removal, deburring, sand blasting and other treatments are needed, and the casting allowance is needed to be removed through machining. The processing technology is complex, and the processing process of each part is as follows: one, front end cover: 1. using a wood pattern as a core 2, drying 3, beating an appearance sand pattern 4, installing the core 5, pouring 6, demoulding, cleaning 7, annealing 8, sandblasting, polishing 9, machining by a lathe 10, loading a master mould, drilling 11 and tapping; II, rear end cover: similar to the front end cover, a plurality of 3 holes are drilled for tapping and are fixed by the rear cover; three organisms: 1. the method comprises the steps of manufacturing a sand core 2 by using a wood die, drying 3, forming a sand mould 4, installing the sand core 5, pouring 6, removing the mould, cleaning sand 7, annealing 8, sandblasting and polishing 9, milling a base 10 by a milling machine, machining 11 an upper profiling, drilling 12 and tapping. Each part has 11-12 processes.

Disclosure of Invention

The utility model aims to overcome the shortcomings of the motor, and provides a motor which can reduce the weight of the whole motor and the manufacturing cost and is simple to process.

The utility model discloses the technical scheme who adopts is a motor, including rotor, stator, shell, fan, pivot, the rotor cover is outside the pivot, and the stator is fixed in the shell, and its main points lie in, and the shell comprises front end body, rear end body two parts, and the two opens the end and meets, and the center of preceding, rear end body blind end is dashed respectively has the bearing mounting hole, and the pivot is fixed in the central bearing mounting hole of preceding, rear end body bottom through the bearing.

The utility model discloses an improve on the basis of current motor, keep its all component parts, only improve the shell, with original front end housing, the organism, the component structure improvement of rear end cap triplex is the front end body, rear end body two parts, moreover, the steam generator is simple in structure, can be formed by the steel sheet punching press, the casting has been avoided, the inherent defect that die casting technology brought, the casing wall thickness can be thinner than the casting, generally 2/3-1/3 of casting casing wall thickness, reduce complete machine weight, reduce the surplus and the work load of follow-up machine tooling simultaneously, and the manufacture cost is reduced, the whole manufacture process is simple, high efficiency.

The length ratio of the front end body to the rear end body is 1-5: 1-5. Preferably, the length ratio of the front end body to the rear end body is 1: 1, the front end body and the rear end body can be formed by punching a set of dies.

The fan is arranged in the inner cavity of the shell, and the fan is sleeved in the rotating shaft and positioned between the rotor and the inner surface of the bottom of the shell. The fan is arranged in the shell, so that the fan directly faces the rotor and the stator, the heat dissipation effect is good, the fan blade shield is omitted, and the weight reduction and the cost reduction are facilitated.

An air outlet is designed on the surface of the closed end of the end body close to the fan, and an air inlet is designed on the side edge of the bottom of the shell far away from the fan.

The inner parts of the front end body and the rear end body are uniformly provided with more than or equal to two fixing ribs along the circumference, the mounting surface formed by the fixing ribs is in interference fit with the outer ring of the stator, the number of the fixing ribs is more than or equal to two limiting ribs, and the circumferential surface formed by the top ends of the limiting ribs is smaller than the outer ring of the stator. The stability of installation has been guaranteed to interference fit, and spacing muscle is fixed a position to the axial position of stator, because fixed muscle is interval distribution, makes the position that does not have fixed muscle, and gapped between stator and the shell, the wind that the fan blew off can be by the clearance flow, that is to say that the fan is direct to cooling rotor, stator and the shell is inside, and the cooling effect is good, has improved the operational environment of complete machine. The existing fan only cools the shell, and the shell is coated with primer and finish paint, so that the heat dissipation effect is poor.

The fixing ribs and the limiting ribs are formed by stretching the fixing ribs and the front end body and the rear end body together. Simple processing, direct molding, good concentricity and firmness.

The fixing rib and the limiting rib in the front end body are formed by welding a hollow or solid structure and the front end body, and the fixing rib and the limiting rib in the rear end body are formed by spot welding a hollow or solid structure and the rear end body. The hollow structure can be in an inverted U shape or a square shape and the like.

The closed ends of the front and rear end bodies are provided with retaining shoulders which are turned inwards or outwards by 90 degrees with the plane of the closed ends to form bearing mounting holes.

The utility model has the advantages of, constitute and the processing technology through the structure that changes the shell, with original front end housing, the organism, the component structure improvement of rear end housing triplex is the front end body, rear end body two parts, and form by the steel sheet punching press, improve shell strength, the casting has been avoided, the inherent defect that die casting technology brought, also reduce complete machine weight simultaneously, reduce the surplus and the work load of follow-up machining, reduce manufacturing cost, whole manufacture process is simple, high efficiency, adorn the fan in the shell inner chamber, the fixed muscle of stator is interval distribution, it is gapped between stator and the shell, the wind that the fan blew off can flow by the clearance, the fan directly cools off stator and shell, the cooling effect is good.

Drawings

FIG. 1 is a perspective view showing an appearance of a conventional motor

FIG. 2 is a rear view of FIG. 1

FIG. 3 is a top view of FIG. 1

FIG. 4 is a cross-sectional view S-S of FIG. 3

FIG. 5 is a perspective view of the present invention

FIG. 6 is a rear view of FIG. 5

FIG. 7 is a top view of FIG. 5

FIG. 8 is a sectional view taken along line B-B of FIG. 7

FIG. 9 is a front view of FIG. 5

FIG. 10 is a cross-sectional view taken at P-P of FIG. 9

Wherein: 1 casing 11 front end cover 12 body 121 heat dissipation muscle 13 rear end cover 14 front end body 141 gas outlet 15 rear end body 151 air inlet 16 fixed muscle 17 spacing muscle 18 fender shoulder 19 clearance 2 pivot 4 rotor 6 stator 8 fan blade guard shield 81.

Detailed Description

The present invention will be described in detail with reference to the drawings

As shown in fig. 4-9, a motor is an improvement on the existing motor, and the same is that the motor comprises a rotor 5, a stator 6, a housing 1, a fan 8 and a rotating shaft 2, the rotor is sleeved outside the rotating shaft, the stator is fixed in the housing, the difference is that the housing 1 is only composed of a front end body 14 and a rear end body 15, the front end body and the rear end body are formed by punching steel plates, the ends of the front end body and the rear end body are connected, bearing mounting holes are respectively punched in the centers of the closed ends (also called as bottoms) of the front end body and the rear end body, and the rotating shaft is fixed in central bearing mounting holes at the bottoms of the front end body and the rear end body through bearings. The closed ends of the front and rear end bodies are provided with retaining shoulders 18 which are turned inwards or outwards by 90 degrees with the plane of the closed ends to form bearing mounting holes. The length ratio of the front end body to the rear end body is 1-5: 1-5. The optimal ratio of the front end body to the rear end body is that the length ratio of the front end body to the rear end body is 1: 1, the front end body and the rear end body can be formed by punching a set of dies.

Another significant improvement of the present invention is that the fan is installed in the inner cavity of the housing, and the fan is sleeved in the rotating shaft and located between the rotor and the inner surface of the bottom of the housing. The fan is arranged in the shell, so that the fan directly faces the rotor and the stator, the heat dissipation effect is good, the fan blade shield is omitted, and the weight reduction and the cost reduction are facilitated. Two or more fixing ribs 16 are uniformly arranged in the front end body and the rear end body along the circumference, a mounting surface formed by the fixing ribs 16 is in interference fit with the outer ring of the stator 6, two or more limiting ribs 17 are arranged at the same time, and the circumferential surface formed by the top ends of the limiting ribs is smaller than the outer ring of the stator. When the fixed muscle is two, the sectional area of every is twenty-fourth of the circumference area at least, has three fixed muscle, spacing muscle generally and evenly arranges along the circumference, and the internal diameter of the top surface of spacing muscle is less than the external diameter of stator, thereby blocks the stator and plays the effect of fixing a position the axial position of stator. Because the fixed ribs are distributed at intervals, a gap 19 is formed between the stator and the shell, and a gap is also formed between the rotor and the stator, the gaps are used as passages of fan air flow, air blown out by the fan can flow through the gaps, namely the fan directly cools the rotor, the stator and the inner surface of the shell, and the cooling effect is good.

The fan can be arranged at the front end body or the rear end body, an air outlet 141 is arranged on the surface of the closed end of the end body close to the fan, and an air inlet 151 is arranged on the side edge of the bottom of the shell far away from the fan.

The fixing ribs 16 and the limiting ribs are formed by stretching the front end body and the rear end body together. The fixing rib 16 and the limiting rib in the front end body can be welded and fixed, the fixing rib 16 and the limiting rib in the rear end body are welded and formed by a hollow or solid structure and the rear end body. The hollow structure can be in an inverted U shape or a square shape and the like. Or the fixed rib in the front end body is formed by welding a solid structure and the front end body, the fixed rib in the rear end body is formed by welding a solid structure and the rear end body, the solid fixed rib is processed into a step, and the step is the limiting point. The rest of the parts which are not described are the same as the prior art.

The manufacturing process of the front end body comprises the following steps: 1, blanking 2, stretch forming 3, punching an installation and positioning hole 4 at a cutting port, punching a stator installation hole 5, turning a bearing installation hole 6, and punching an air inlet hole; the manufacturing process of the rear end body comprises the following steps: 1, blanking 2, stretch forming 3, punching an installation and positioning hole 4 at a cutting port, punching a stator installation hole 5, turning a bearing installation hole 6 and punching an air hole.

The assembly process comprises the following steps: and (3) carrying out surface treatment on the front end body and the rear end body, namely pressing in a stator, installing the stator and installing a rotor assembly.

Above embodiment only is for explaining the utility model discloses a technical thought can not be injectd with this the utility model discloses a protection scope, all according to the utility model provides a technical thought, any improvement of doing on technical scheme basis and equal replacement all fall into within the protection scope of the utility model.

Claims

1. The utility model provides a motor, including rotor (5), stator (6), shell (1), fan (8), pivot (2), the rotor cover is outside the pivot, the stator is fixed in the shell, a serial communication port, shell (1) comprises front end body (14), rear end body (15) two parts, the two opens the end and meets, the bearing mounting hole has been dashed respectively in the center of preceding, rear end body blind end, the pivot is fixed in preceding, in the central bearing mounting hole of rear end body bottom through the bearing, the fan dress is in the shell inner chamber, the fan cover is in the pivot, be located between rotor and the shell bottom internal surface.

2. The motor of claim 1, wherein the ratio of the lengths of the front body to the rear body is 1-5: 1-5.

3. An electric motor as claimed in claim 1, characterized in that the surface of the closed end of the end body near the fan is provided with air outlets (141) and the side of the housing remote from the bottom of the fan is provided with air inlets (151).

4. An electric motor according to claim 1, wherein two or more fixing ribs (16) are uniformly arranged in the front and rear end bodies along the circumference, the fixing ribs (16) form a mounting surface in interference fit with the outer ring of the stator (6), and two or more limiting ribs (17) form a circumferential surface smaller than the outer ring of the stator.

5. An electric motor as claimed in claim 4, wherein the fixing ribs (16) and the limiting ribs are formed by stretching together the front and rear end bodies.

6. The motor of claim 4, wherein the fixing rib (16) and the limiting rib of the front end body are formed by welding a hollow or solid structure with the front end body, and the fixing rib (16) and the limiting rib of the rear end body are formed by spot welding a hollow or solid structure with the rear end body.

7. An electric motor as claimed in claim 1, wherein the closed ends of the front and rear end bodies have shoulders (18) turned inwardly or outwardly at 90 degrees to the plane of the closed ends to define the bearing mounting holes.