CN216356281U - Motor with grounding terminal and blower with same - Google Patents

Abstract

The utility model discloses a motor with a grounding terminal and an air blower with the motor, wherein the motor comprises a shell, an end cover arranged on the shell and a wire holder fixed on the end cover, the wire holder comprises the grounding terminal, the grounding terminal comprises a main body part and a grounding pin integrally formed on the main body part, the main body part is fixed on the wire holder through injection molding, and the grounding pin is bent after injection molding and is elastically contacted with the shell through the compression of the end cover to realize grounding; the grounding pin is set to be in different states, so that the grounding pin is convenient to punch during punching and is beneficial to mold stripping during injection molding, and the problem of injection molding interference is solved; after injection molding is finished, bending treatment is carried out to enable the grounding pin and the negative electrode to form an elastic structure with mutually vertical spaces, so that the top end of the grounding pin is conveniently bent and deformed when the end cover is riveted in the motor assembling process, the requirement on the size of parts is low, and the assembly is simple; meanwhile, the grounding pin is elastically contacted with the shell, so that the motor can be grounded more reliably.

Description

Motor with grounding terminal and blower with same

Technical Field

The utility model relates to the technical field of motors, in particular to a motor with a grounding terminal and an air blower with the motor.

Background

At present, the automobile industry has higher requirements on Electromagnetic Compatibility (EMC) of the motor, and the wiring part of the motor needs to be effective and reliable.

In designing a motor structure, a connecting circuit transmits current or signals between different structures to control the operation of the motor, and in order to ensure the safety and reliability of the connection, a plurality of circuits are generally subjected to line concentration processing to form a connector or a terminal. The grounding mode of the brush motor is various, and usually, when the shell and the end cover are riveted, a grounding pin is squeezed between the shell and the end cover to complete grounding. This kind of ground connection mode can cause the motor riveting axiality variation usually, and the motor appears eccentric rotation, leads to the too fast wearing and tearing of motor inner structure in the operation process to cause the motor abnormal sound.

Therefore, how to improve the grounding effect of the motor, avoid abnormal sound and noise of the motor, and reduce influence on the use performance caused by poor riveting coaxiality of the motor is a problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

Aiming at least one defect in the prior art, the utility model provides a motor with a grounding terminal and an air blower with the motor, which solve the problem of coaxiality of the motor and greatly improve the reliability.

The utility model is realized by the following technical scheme:

a motor with a grounding terminal comprises a shell, an end cover arranged on the shell and a wire holder fixed on the end cover, wherein the wire holder comprises the grounding terminal, the grounding terminal comprises a main body part and a grounding pin integrally formed on the main body part, and the main body part is fixed on the wire holder through injection molding; the grounding pin is bent after injection molding, and is pressed by the end cover to be in elastic contact with the shell to realize grounding; the main body part comprises an external joint, a negative pole and a contact, the contact is arranged at one end of the main body part, the negative pole is arranged at the other end of the main body part, and the external joint is arranged in the middle area of the main body part and is in a state of being mutually vertical to the negative pole in space; the grounding pin is arranged in a vertical state to form a parallel structure in the same direction with the negative electrode during injection molding; the grounding pin is in a state of being mutually vertical to the negative electrode in space through bending treatment after injection molding; when the grounding wire is assembled and used, the grounding pin on the wire holder is pressed by the end cover to be in elastic contact with the shell to realize grounding. The grounding pin is set to be in different states, wherein the grounding pin and the negative electrode are in a structure parallel to each other in the same direction, so that the grounding pin is convenient to stamp during stamping and is beneficial to mold stripping during injection molding, and the problem of injection molding interference is solved; after injection molding is finished, the grounding pin and the negative electrode form an elastic structure with mutually vertical spaces through bending treatment, so that the top end of the grounding pin is conveniently bent and deformed when the end cover is riveted in the motor assembling process, the requirement on the size of parts is low, and the assembly is simple; and the wiring base can not be inclined after being assembled, the flatness is higher after the end cover is assembled, the concentricity of the whole machine is improved, the consistency of the motor is improved, and the noise of the motor can be effectively avoided. Meanwhile, the grounding pin is in elastic contact with the shell, so that the motor can reliably realize a good grounding effect.

Further, the grounding pin comprises a pointed part and an opening, the opening is arranged on the side wall of the bending deformation part of the root part of the grounding pin, and the pointed part is arranged at the front end part of the grounding pin; an opening is formed in the bending deformation position of the grounding pin, so that the grounding pin is convenient to bend, and the bending internal stress is easy to release in the bending process; the tip part is arranged at the front end part of the grounding pin to prevent the grounding pin from being bent, and when the grounding pin is installed into the shell together with the wire holder through the end cover and then keeps good elastic contact with the shell to realize grounding, the phenomenon that the excessive end part allowance of the grounding pin is exposed out of the shell to influence the use effect and the attractiveness is effectively avoided. A gap is formed between the shell and the end cover after the shell and the end cover are connected, and the grounding pin is arranged in the gap and elastically presses the shell; through such setting up structure, can guarantee not to extrude the earthing pin, can also reach stable ground connection effect.

Preferably, a clamping arm is arranged on the machine shell and is hung on a fixed block on the end cover through a bent hook; the fixing block is provided with a straight surface and an inclined surface, the straight surface is convenient to insert into the bayonet, the two sides of the straight surface are parallel to the axial direction, the inclined surface is provided with a preset angle, and the clamping arm can apply force to the inclined surface to hold the end cover tightly after being deformed; preferably, the clamping arms are bent to form bayonets, and the bayonets are connected with fixed blocks in a hooking manner to assemble and fix the shell and the end cover; thereby realizing the quick and stable connection effect of the shell and the end cover.

Preferably, the two openings are symmetrically arranged on two side walls of the bending deformation position of the grounding pin; the opening is in a semi-circular arc shape, a square shape or a triangular shape; the grounding pin is uniformly stressed and does not distort when being bent and deformed through symmetrical arrangement, the grounding pin is convenient to process, and elastic deformation is not easy to fail prematurely in use.

Further, after the grounding pin is bent, the pointed part keeps relative elastic deformation, and the grounding pin and the shell form axial interference fit; the axial interference refers to the deformation of the grounding pin after the contact with the shell after the motor is assembled, namely the deformation of the contact arm at the lower part of the notch; the resilience performance of the deformed contact arm is good so as to be different from the structures of other motors; the grounding pin on the wire holder is compressed tightly and is in interference fit with the axial direction of the shell when the end cover is assembled on the motor, the coaxiality of the whole motor is not easy to be poor after the end cover is assembled, and the grounding failure caused by poor assembly is avoided. This scheme keeps relative elastic deformation volume, can not lead to the end cover perk serious and cause motor ground connection bad to and influence the EMC test performance of whole car.

Furthermore, the end face of the wire holder, on which the negative electrode is arranged, comprises a first table top and a second table top, a step is formed between the first table top and the second table top, and the offset of the step is 0.4-0.8 mm; the disconnection difference is formed by arranging the table top and the step, so that the opening on the grounding pin is close to the same level as the first table top, the grounding pin is easy to deform and bend during bending, and the grounding pin keeps better strength and elastic deformation performance. Be provided with the stopper on the first mesa, be provided with bevel portion on the stopper, bevel portion sets up and is being close to earthing rod one side, the stopper sets up step department is close to the lateral wall department of earthing rod. The first table top is also provided with a polar hole, and the second table top is also provided with a needle opening; the negative pole is located in the utmost point hole, the earthing needle is located in the needle mouth, the stopper plays limiting displacement to the earthing needle and prevents the skew, and the boss plays the supporting role to the earthing needle and prevents that elastic deformation is excessive and inefficacy.

Preferably, the limiting block is provided with an oblique angle part, the oblique angle part is arranged on one side close to the grounding pin, and the limiting block is arranged on the side wall of the step close to the grounding pin; prevent that the earthing pin from squinting the design position and influencing the service function when handling bending through setting up the stopper, simultaneously through set up the guide effect of oblique angle portion to the earthing pin when handling bending on the stopper, improve the efficiency of bending and bend effectually.

Further, the boss comprises a slope part and a supporting part, the boss is arranged below the grounding pin and close to the limiting block, the supporting part is arranged at the top end of the boss, the slope part is arranged on the boss and far away from the grounding pin, and the supporting part and the slope part form an auxiliary mechanism for supporting elastic deformation of the grounding pin; through such structure be provided with the elastic deformation ability that does benefit to improvement earthing rod to further improve earthing effect of earthing rod, improve motor life.

Compared with the prior art, the utility model has the advantages that:

1. the design aims to realize the elastic deformation of the grounding pin through the matching of the grounding pin, the wire holder and the shell, so as to carry out elastic grounding; in order to meet EMC requirements, the grounding pin is connected with a negative terminal of the motor, and the terminal is connected with a power supply. Through opening a notch at the earthing pin top, the earthing pin is buckled and warp by the pressure when riveting the end cover, has solved the motor axiality problem, and the reliability also has very big improvement simultaneously. The motor has more reliable grounding and does not influence the concentricity of the motor. The requirement on the size of parts is low, and the assembly is simple.

2. The motor with the grounding terminal and the grounding pin of the blower with the motor are set to be in different states (including a punch forming state, an injection molding state, a bending state and an elastic deformation state during assembly and use), wherein the grounding pin and the negative electrode are in a structure parallel in the same direction, so that the punching is convenient during punching, and the demolding of a mold is facilitated during injection molding, so that the problem of injection interference is solved; after injection molding is finished, the grounding pin and the negative electrode form an elastic structure with mutually vertical spaces through bending treatment, so that the top end of the grounding pin is conveniently bent and deformed when the end cover is riveted in the motor assembling process, the requirement on the size of parts is low, and the assembly is simple; and the wiring base can not be inclined after being assembled, the flatness is higher after the end cover is assembled, the concentricity of the whole machine is improved, the consistency of the motor is improved, and the noise of the motor can be effectively avoided. Meanwhile, the grounding pin is in elastic contact with the shell, so that the motor can reliably realize a good grounding effect.

3. This motor with ground terminal and have air-blower of this motor form the offset through setting up mesa and step, make the opening on the earth pin be close the parallel and level with first mesa to the earth pin warp the bending easily when handling bending, the earth pin keeps better intensity and elastic deformation performance. Prevent that the earthing pin from squinting the design position and influencing the service function when handling bending through setting up the stopper, simultaneously through set up the guide effect of oblique angle portion to the earthing pin when handling bending on the stopper, improve the efficiency of bending and bend effectually. Through setting up supporting part and slope portion constitution support grounding pin's elastic deformation's complementary unit, such structure is provided with and does benefit to the elastic deformation ability that improves grounding pin to further improve grounding pin's ground effect, improve motor life.

Drawings

Fig. 1 is a perspective assembly view of the motor with ground terminals;

fig. 2 is an exploded view of the motor with ground terminals;

fig. 3 is a sectional view of the motor having a ground terminal;

fig. 4 is a sectional view of a ground terminal of the motor having the ground terminal;

fig. 5 is a view showing an assembly structure of a housing and an end cap of the motor having the ground terminal;

fig. 6 is a gap setting view of a housing and an end cover of the motor having the ground terminal;

fig. 7 is an injection-molded view of the wire holder and the ground terminal of the motor having the ground terminal;

fig. 8 is an exploded view of the wire holder and ground terminal of fig. 7;

FIG. 9 is an enlarged view of the wire holder of FIG. 8 at A;

fig. 10 is a perspective view of the ground terminal of fig. 7 (not bent);

fig. 11 is a perspective view of the ground terminal of fig. 7 (bending process).

Reference numerals: 10-a machine shell, 11-a clamping arm, 12-a bayonet, 20-an end cover, 21-a clamping groove, 22-a fixing block, 221-a straight surface and 222-an inclined surface; 30-wire holder, 301-first mesa, 302-step, 303-second mesa; 31-stopper, 311-beveled; 32-boss, 321-ramp, 322-support; 33-needle mouth, 34-negative pole hole; 4-ground terminal, 40-external connector, 41-main body part, 50-ground pin, 51-gap, 501-tip part, 502-opening; 60-negative, 70-contact, 80-positive terminal.

Detailed Description

The following non-limiting detailed description of the present invention is provided in connection with the preferred embodiments and accompanying drawings. In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

As shown in fig. 1 to 8, the motor with a ground terminal and the blower having the motor provided by the present invention includes a casing 10, an end cap 20 mounted on the casing 10, and a wire holder 30 connected to the end cap 20, wherein a ground terminal 4 is provided on the wire holder 30, the ground terminal 4 includes a main body portion 41 and a ground pin 50 integrally formed on the main body portion 41, and the main body portion 41 is fixed on the wire holder 30 by injection molding; the grounding pin 50 is bent after injection molding, and is pressed by the end cover 20 to elastically contact with the casing 10 to realize grounding; the main body part 41 comprises an external joint 40, a negative pole 60 and a contact 70, wherein the contact 70 is arranged at one end of the main body part 41, the negative pole 60 is arranged at the other end of the main body part 41, the external joint 40 is arranged in the middle area of the main body part 41 and is in a mutually perpendicular state with the negative pole 60; the grounding pin 50 is arranged in a vertical state to form a parallel structure in the same direction with the negative pole 60 during injection molding; the grounding pin 50 is formed in a mutually perpendicular spatial state with the negative electrode 60 through bending after injection molding; when the connector is assembled for use, the grounding pin 50 on the connector holder 30 is pressed by the end cover 20 to be in elastic contact with the casing 10 to realize grounding. The grounding pin can be constructed into different states (including a punch forming state, an injection molding state, a bending state and an elastic deformation state during assembly and use), wherein the grounding pin and the negative electrode are in a structure parallel in the same direction, so that the grounding pin is convenient to punch and manufacture during punching, and is beneficial to mold stripping during injection molding, thereby solving the problem of injection molding interference; after injection molding is finished, the grounding pin and the negative electrode form an elastic structure with mutually vertical spaces through bending treatment, so that the top end of the grounding pin is conveniently bent and deformed when the end cover is riveted in the motor assembling process, the requirement on the size of parts is low, and the assembly is simple; and the wiring base can not be inclined after being assembled, the flatness is higher after the end cover is assembled, the concentricity of the whole machine is improved, the consistency of the motor is improved, and the noise of the motor can be effectively avoided. Meanwhile, the grounding pin is in elastic contact with the shell, so that the motor can reliably realize a good grounding effect.

As a further improvement, as shown in fig. 5 to 8 and 11, the grounding pin 50 includes a pointed portion 501 and an opening 502, and the opening 502 is provided on the side wall of the bending deformation of the root of the grounding pin 50, and the pointed portion 501 is provided at the front end portion of the grounding pin 50; the two openings 502 are symmetrically arranged on two side walls at the bending deformation position of the grounding pin 50; the opening 502 is semi-circular arc, square or triangular; after the grounding pin 50 is bent, the pointed part 501 keeps the relative elastic deformation, and the grounding pin 50 and the shell 10 form axial interference fit; the axial interference refers to the deformation of the grounding pin after contacting the casing after the motor is assembled, namely the deformation of the contact arm at the lower part of the opening 502; the resilience performance of the deformed contact arm is good so as to be different from the grounding structure of the motor in the prior art; when the motor is assembled with the end cover 20, the grounding pin 50 on the wire holder 30 is pressed to be in axial interference fit with the shell 10, the coaxiality of the whole motor is not easy to be poor after the end cover 20 is assembled, and the grounding failure caused by poor assembly is avoided. The scheme keeps relative elastic deformation, so that poor grounding of the motor caused by serious tilting of the end cover and influence on EMC test performance of the whole vehicle are avoided; an opening is formed in the bending deformation position of the grounding pin, so that the grounding pin is convenient to bend, and the bending internal stress is easy to release in the bending process; the front end part of the grounding pin is provided with the pointed part to prevent the grounding pin from being bent and then the end cover and the wire holder are arranged in the shell together and then keep good elastic contact with the shell to realize grounding, so that the phenomenon that the end part of the grounding pin is excessively exposed out of the shell to influence the use effect and the attractiveness is effectively avoided; the grounding pin is uniformly stressed and does not distort when being bent and deformed through symmetrical arrangement, the grounding pin is convenient to process, and elastic deformation is not easy to fail prematurely in use. A gap 51 is arranged between the shell 10 and the end cover 20 after the shell and the end cover are connected, and the grounding pin 50 is arranged in the gap 51 and elastically presses the shell; a clamping arm 11 is arranged on the machine shell 10, and the clamping arm 11 is hooked on a fixed block 22 on the end cover 20 through a bent hook; the fixing block 22 is provided with a straight surface 221 which is convenient for being inserted into the bayonet 12 and two sides of which are parallel to the axial direction and an inclined surface 222 with a preset angle, and the clamping arm 11 can apply force to the inclined surface 222 to clasp the end cover 20 after being deformed; for example, the clip arm 11 is bent to form the clip 12, and the plurality of clips 12 are hooked and connected with the fixing block 22 to assemble and fix the housing 10 and the end cap 20; thereby realize quick, stable connection effect of casing and end cover, through such structure that sets up, can guarantee not to extrude the earthing rod, can also reach stable ground connection effect. Wherein the preset angle is an included angle between the inclined plane and the straight plane, and the preset angle is preferably 20-45 degrees; so, can guarantee the hook intensity on card arm and inclined plane and can not lead to the card arm excessive deformation and fracture.

As another improvement of the present invention, as shown in fig. 7 and 8, the end surface of the wire holder 30 where the negative electrode 60 is disposed includes a first mesa 301 and a second mesa 303, a step 302 is formed between the first mesa 301 and the second mesa 303, and the step 302 has a step difference of 0.4mm to 0.8 mm; the first table 301 is provided with a stopper 31, the stopper 31 is provided with an oblique angle portion 311, the oblique angle portion 311 is disposed on one side close to the ground pin 50, and the stopper 31 is disposed on the step 302 close to the side wall of the ground pin 50. The disconnection difference is formed by arranging the table top and the step, so that the opening on the grounding pin is close to the same level as the first table top, the grounding pin is easy to deform and bend during bending, and the grounding pin keeps better strength and elastic deformation performance. The first table top is also provided with a pole hole, and the second table top is also provided with a needle opening; its negative pole is located the utmost point hole, and the earthing needle is located the needle mouth, and the stopper plays limiting displacement to the earthing needle and prevents the skew, and the boss plays the supporting role to the earthing needle and prevents that elastic deformation is excessive and inefficacy.

As a further improvement, as shown in fig. 9, the stopper 31 is provided with an oblique corner portion 311, the oblique corner portion 311 is disposed on a side close to the ground pin 50, and the stopper 31 is disposed at the step 302 close to a side wall of the ground pin 50; the boss 32 comprises a slope part 321 and a support part 322, the boss 32 is arranged below the grounding pin 50 and close to the limiting block 31, the support part 322 is arranged at the top end of the boss 32, the slope part 321 is arranged on the boss 32 and far away from the grounding pin 50, and the support part 322 and the slope part 321 form an auxiliary mechanism for supporting the elastic deformation of the grounding pin 50; the structure is favorable for improving the elastic deformation capacity of the grounding pin, so that the grounding effect of the grounding pin is further improved, and the service life of the motor is prolonged; prevent that the earthing pin from squinting the design position and influencing the service function when handling bending through setting up the stopper, simultaneously through set up the guide effect of oblique angle portion to the earthing pin when handling bending on the stopper, improve the efficiency of bending and bend effectually.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. An electric machine with a ground terminal, comprising a housing (10), an end cover (20) mounted on the housing (10), and a wire holder (30) connected to the end cover (20), the wire holder (30) being provided therein with a ground terminal (4), characterized in that:

the grounding terminal (4) comprises a main body part (41) and a grounding pin (50) integrally formed on the main body part (41), and the main body part (41) is fixed on the wire holder (30) through injection molding; the grounding pin (50) can be elastically pressed on the shell (10) to realize grounding under the state that the shell (10) and the end cover (20) are fixed.

2. The electric machine with a ground terminal of claim 1, characterized in that: the main body part (41) comprises an outer joint (40), a negative electrode (60) and a contact (70), the contact (70) is arranged at one end of the main body part (41), the negative electrode (60) is arranged at the other end of the main body part (41), and the outer joint (40) is arranged in the middle area of the main body part (41) and is in a mutually vertical state with the negative electrode (60); the grounding pin (50) is arranged in a vertical state to form a parallel structure in the same direction with the negative electrode (60) during injection molding; the grounding pin (50) is in a state of being mutually vertical to the negative electrode (60) in space through bending after injection molding.

3. The electric machine with a ground terminal of claim 2, characterized in that: the grounding pin (50) comprises a pointed part (501) and an opening (502), the opening (502) is arranged on the side wall of the bending deformation part of the root of the grounding pin (50), and the pointed part (501) is arranged at the front end part of the grounding pin (50); the two openings (502) are symmetrically arranged on two side walls of the bending deformation position of the grounding pin (50).

4. The electric machine with a ground terminal of claim 3, characterized in that: a gap (51) is formed between the shell (10) and the end cover (20) after the shell and the end cover are connected, and the grounding pin (50) is installed in the gap (51) and elastically presses the shell.

5. The electric machine with a ground terminal of claim 2, characterized in that: the terminal surface that sets up negative pole (60) department on wire holder (30) includes first mesa (301) and second mesa (303), form step (302) between first mesa (301) and second mesa (303), the offset of step (302) is 0.4mm ~ 0.8 mm.

6. The electric machine with a ground terminal of claim 5, wherein: be provided with stopper (31) on first mesa (301), be provided with bevel portion (311) on stopper (31), bevel portion (311) set up and are being close to earthing rod (50) one side, stopper (31) set up step (302) department is close to the lateral wall department of earthing rod (50).

7. The electric machine with a ground terminal of claim 5, wherein: the second table top (303) is provided with a boss (32) for assisting the grounding pin (50) to elastically deform; the boss (32) comprises a slope portion (321) and a supporting portion (322), the boss (32) abuts against the bottom of the grounding pin (50), the supporting portion (322) is arranged at the top end of the boss (32), and the slope portion (321) is connected with the supporting portion (322) and is far away from the grounding pin (50) compared with the supporting portion (322).

8. The electric machine with a ground terminal of claim 4, wherein: the shell (10) is provided with a clamping arm (11), and the clamping arm (11) is hooked on a fixing block (22) on the end cover (20) through a bent hook.

9. The electric machine with a ground terminal of claim 8, wherein: the fixing block (22) is provided with a straight surface (221) which is convenient to insert into the bayonet (12) and two sides of which are parallel to the axial direction and an inclined surface (222) with a preset angle, and the clamping arm (11) can apply force to the inclined surface (222) to clasp the end cover (20) after being deformed;

the preset angle is 20-45 degrees.

10. A blower, characterized by: an electrical machine as claimed in any one of claims 1 to 9.

Images