CN114069943B - Positioning washer for an electric machine, fixing device and method for fixing an electric machine - Google Patents
Positioning washer for an electric machine, fixing device and method for fixing an electric machine Download PDFInfo
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- CN114069943B CN114069943B CN202010786518.8A CN202010786518A CN114069943B CN 114069943 B CN114069943 B CN 114069943B CN 202010786518 A CN202010786518 A CN 202010786518A CN 114069943 B CN114069943 B CN 114069943B
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- washer
- end cap
- positioning
- positioning washer
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 13
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 210000000078 claw Anatomy 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 2
- 239000004020 conductor Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000013011 mating Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
Abstract
The invention relates to a positioning washer (3) for an electric motor, comprising a washer body (5), the washer body (5) being provided with a central through hole (12) through which a top end of the electric motor (1) passes, wherein the positioning washer (3) comprises a first structure which can be compressed in an axial direction to provide an axial pre-tightening force for the electric motor (1) and a second structure which can guide and position the electric motor (1) in a radial direction. The invention also relates to a fixing device comprising the above-mentioned positioning washer (3) and a fixing end cap (4) for connection to a housing of an electric motor for enclosing the electric motor, and to a method for fixing an electric motor using the above-mentioned fixing device.
Description
Technical Field
The present invention relates to the field of actuators, and more particularly to a positioning washer, a fixture, and a method for fixing an electric motor, for example in a turbocharger actuator.
Background
In current automobiles, turbocharging technology is increasingly used in powertrain to improve energy efficiency. In a turbocharged engine, the exhaust gas pushes a turbine in a turbocharger, which drives an air compressor connected to the turbine to compress intake air, and the compressed air passes through an intercooler to a throttle valve, so that the compressed air enters an engine cylinder for combustion. In general, an actuator (e.g., a General Purpose Actuator (GPA) or the like) mounted in a turbocharger may be used to control a wastegate valve switch of the turbocharger, which functions to maintain the air pressure in the turbocharger stable.
In the prior art, the following two schemes are generally adopted for fixing the motor in the actuator.
The first scheme is that the motor is directly inserted into the corresponding deep groove on the shell from the opening of the shell of the actuator and is fixed with the screw through the flange. In this solution, the conductors in the actuator are usually arranged on the end cap and protrude perpendicularly at the corresponding position to the motor in the housing, the ends of which conductors are usually designed in the shape of a plug, so that the pin needles of the motor are connected to the conductors by means of plugging while the cover is mounted on the housing. However, under this kind of scheme, because motor pin needle and wire can only be in the same place through the mode of pegging graft, when actual operational environment takes place the vibration, produce relative displacement along with the vibration between motor pin needle and the wire for frictional wear takes place between the two, along with the deepening of wearing and tearing degree, and begin to have problems such as contact failure, finally lead to the inefficacy of whole executor.
The second scheme is, on the actuator casing, except above-mentioned open end, the deep groove back that is used for holding the motor in the casing has still offered the opening in addition for can follow the deep groove back with the motor and impress, the motor is interference fit with the deep groove and in order to guarantee the axial direction of motor, the end cover of deep groove passes through laser welding to be connected on the casing, thereby carries out the axial spacing to the motor when sealed to the actuator casing. The conducting wire of the actuator is arranged in the shell, and the pin needle of the motor is spliced with the conducting wire in the shell when the motor is pressed in. Under this kind of scheme, though motor pin needle and wire all are located the casing, and the relative displacement when taking place the vibration is less, and the degree of wear is lighter, nevertheless because the motor is heavier, the impact to the deep groove end cover is great during the vibration, leads to the end cover department to easily take place to become invalid. In addition, because the motor is in interference fit with the shell, the plastic shell is easy to fracture; if non-interference fit is adopted, the motor is not easy to guide. In addition, before laser welding, the motor needs to be axially pre-tightened through the end cover, and the pre-tightening force acts on the end cover, so that the deflection of the welded end cover is easy to cause.
Disclosure of Invention
The invention is based on the background, and aims to provide a novel motor fixing method and a fixing device for implementing the method, so that reliable plug-in connection between a motor pin needle and a lead wire can be ensured, and meanwhile, problems of actuator failure caused by vibration, end cover deflection and shell fracturing caused by axial pre-tightening and the like can be avoided.
According to a first aspect of the present invention, a positioning washer for an electric motor is presented, comprising a washer body provided with a central through hole for the passage of the top end of the electric motor, wherein the positioning washer comprises a first structure which can be compressed in an axial direction to provide an axial pre-tightening force for the electric motor and a second structure which can guide and position the electric motor in a radial direction.
Advantageously, the first structure comprises a plurality of circumferentially spaced apart flexible wave-shaped protrusions extending outwardly from an outer edge of the gasket body.
Advantageously, the second structure comprises a plurality of radial stop bars distributed uniformly in the circumferential direction along the inner wall of the central through hole, said plurality of radial stop bars being in interference fit with the top journal of the motor.
Advantageously, the second structure further comprises a plurality of jaws, each jaw being formed between two adjacent undulating projections and comprising a first portion extending radially outwardly from the gasket body and a second portion extending from the first portion towards the main body of the motor.
Advantageously, in the case of an interference fit of the top journal of the motor on the plurality of radial stop bars, the second portion of each jaw is inserted into a radial gap between a housing receiving cavity for receiving the motor and the motor, wherein the radial gap is occupied by the thickness of the second portion of the jaw.
Advantageously, the second structure further comprises a plurality of jaws, each jaw being integrally formed with each undulating projection and being formed in the form of a tab extending radially outwardly from an outer edge of the undulating projection and in a direction away from the body of the motor.
Advantageously, in the case of an interference fit of the top journal of the motor on the plurality of radial stop bars, the extremity of each jaw abuts against the cavity wall of the housing containing cavity for receiving the motor to radially guide the motor.
Advantageously, the ends of the jaws have a bend in the direction of the body of the motor, which rests against the cavity wall of the housing receiving cavity for receiving the motor in order to radially guide the motor, with an interference fit of the top journal of the motor on the radial stop bars.
According to a second aspect of the present invention, there is provided a fixing device comprising the above-mentioned positioning washer for effecting a radial pre-positioning and an axial pre-tightening of the motor and a fixing end cap for coupling to a housing of the motor to enclose the motor, the fixing end cap for effecting a radial accurate positioning and an axial fixing of the motor, the first structure in the positioning washer being compressed by the fixing end cap to provide an axial pre-tightening force to the motor.
Advantageously, the fixed end cap is snap-connected to a circumferential flange of a cavity wall of a housing receiving cavity for receiving the motor, the fixed end cap comprising a first section of a first diameter cooperating with a bearing chamber of the motor in a precision dimension and a second section of a second diameter cooperating with the circumferential flange, the first section being arranged concentrically with the second section and the first diameter being smaller than the second diameter.
Advantageously, the stationary end cap further comprises a protrusion arranged at the transition between the first and the second section, protruding into the second section, the inner side of the protrusion following the inner side of the first section.
Advantageously, the fixing device further comprises a rotation-limiting structure comprising an upwardly projecting locating pin arranged at the bottom of a housing-receiving cavity receiving the motor, said locating pin being intended to cooperate with a corresponding notch arranged at the bottom of the motor, thereby limiting the circumferential rotation of the motor within the housing-receiving cavity.
According to a third aspect of the present invention, a method of fixing an electric motor by means of the above-mentioned fixing device is presented, wherein the method comprises the steps of:
-inserting the motor into a housing receiving cavity for receiving said motor while ensuring an accurate insertion of the pin needles of the motor into the lead frame;
-interference fitting the positioning washer on a top journal of the motor and pre-positioning the motor in a radial direction by means of a second structure of the positioning washer;
-placing a sealing ring into a receiving groove at the end of the housing receiving cavity, the sealing ring having a height greater than the depth of the receiving groove;
-pressing down the stationary end cap until it contacts the surface of the receiving groove, at which point the bearing chamber of the motor enters and fits precisely into the first section of the stationary end cap having the first diameter; and
-bending the end of the second section of the stationary end cap having the second diameter inwards by an external force to form a snap fit with which the stationary end cap is snap fit onto the circumferential flange of the cavity wall of the housing receiving cavity, with the sealing ring fully pressed into the receiving groove to seal the housing, the positioning washer being compressed between the motor and the stationary end cap to provide an axial pre-tension for the motor.
Advantageously, when inserting the motor into the housing receiving cavity for receiving the motor, the notch arranged at the bottom of the motor is nested on the upwardly projecting locating pin arranged at the bottom of the housing receiving cavity, thereby limiting the circumferential rotation of the motor within the housing receiving cavity.
The positioning washer and the fixing device for the motor are reliable in structure, high in vibration resistance, accurate in positioning and high in flexibility. When the fixing devices are used for fixing the motor, the axial pre-tightening and radial guiding of the motor can be simultaneously met, and the number of parts is greatly reduced.
Drawings
The above and other features and advantages of the present invention will become more readily appreciated from the following description with reference to the accompanying drawings, in which:
fig. 1 shows schematically in perspective view an actuator with a motor mounted thereto;
FIG. 2 illustrates an exploded view of the actuator of FIG. 1;
fig. 3 (a) -3 (c) show three configurations of a positioning washer for a motor in an actuator, respectively;
fig. 4 shows in a partial perspective view the radial guidance of the motor by means of the positioning washer in fig. 3 (b);
FIG. 5 shows the stationary end cap attached with the actuator housing, wherein the locating washer is not shown for clarity in illustrating the mating relationship of the top of the motor with the stationary end cap;
fig. 6 (a) and 6 (b) show structural views of the fixed end cap before and after the fastening part is formed by external force, respectively;
fig. 7 (a) shows a housing receiving space in the actuator housing for receiving the motor, wherein an upwardly projecting detent pin is arranged in the housing receiving space; and
fig. 7 (b) shows in partial perspective view that the motor is disposed within the housing receiving cavity shown in fig. 7 (a), wherein the locating pin in fig. 7 (a) cooperates with a notch in the bottom of the motor to provide rotational limit.
Detailed Description
The invention is described in further detail below with reference to the drawings and to specific embodiments. Description of orientations such as "upper", "lower", "top", "bottom", "inner", "outer", "radial", "axial", etc. which may be used in the following description are for convenience of description only and are not intended to limit the inventive arrangements in any way unless explicitly stated. In addition, terms such as "first," "second," and the like are also used hereinafter to describe elements of the present application, and these terms are used solely to distinguish between the individual elements and are not intended to limit the nature, sequence, order, or number of such elements.
Fig. 1 and 2 schematically show an actuator with a motor mounted thereto in a perspective view and an exploded view, respectively. The actuator may be used in an automotive turbocharger, although other applications are possible. As can be seen from fig. 1, the electric motor 1 is inserted into a housing receptacle 2 of the actuator housing and is in a clearance fit with the housing receptacle 2, the electric motor 1 being able to simultaneously perform an axial pretension and a radial alignment of the electric motor 1 by means of a single positioning washer 3 and finally a fixation of the electric motor by means of a fixation end cap 4.
In existing actuator designs, multiple components are often employed to axially pre-load and radially pilot the motor for the motor mounting block. For example, in a product construction of Bosch known to the applicant, it is mainly the use of positioning washers and sleeves that together limit the radial movement of the motor and that additionally solely by means of a v-washer effect an axial pretension of the motor. It can be seen that this involves a large number of components for the stationary motor, which results in a complicated method step for fixing the motor. However, the positioning washer provided in the present invention integrates the axial pre-tightening structure and the radial centering structure for the motor, so that the axial pre-tightening and the radial centering positioning of the motor can be simultaneously satisfied, and the number of parts is greatly reduced.
Referring in particular to fig. 3 (a) -3 (c), three structural forms of the above-described positioning washer 3 can be seen. In general, the positioning washer 3 comprises a washer body 5, which washer body 5 is provided with a central through hole 12 for the passage of the top end of the motor 1, a first structure which can be compressed in the axial direction to provide an axial pre-tightening force for said motor 1 and a second structure which can guide and position said motor 1 in the radial direction.
According to a preferred embodiment, the first structure is a plurality of (three in the figure) circumferentially spaced flexible wave-shaped protrusions 6 extending outwardly from the outer edge of the gasket body 5, such wave-shaped protrusions 6 being capable of being compressed when compressed to provide a certain axial pretension.
As shown in fig. 3 (a), the second structure comprises a plurality of radial stop ribs 7 distributed uniformly in the circumferential direction along the inner wall of the central through hole 12, these radial stop ribs 7 being intended for an interference fit with the top journal of the motor (see fig. 4), thus providing in part a radial stop for the motor 1. The second structure further comprises a plurality of jaws 8 for radial limiting. In the structure shown in fig. 3 (a), each jaw 8 is formed between two adjacent wave-shaped protrusions 6, and includes a first portion 9 extending radially outwardly from the washer body 5 and a second portion 10 extending from the first portion 9 axially toward the main body of the motor (as generally downward in the drawing). With the top journal of the motor 1 interference fitted over the above-mentioned radial stop bars 7, the second portion 10 of each jaw 8 can be inserted into a radial gap 11 (see fig. 2) between the housing receiving chamber 2 for receiving the motor 1 and the motor 1, which radial gap 11 is sufficiently occupied by the thickness of the second portion 10 of the jaw so that the jaw 8 together with the radial stop bars 7 serve to achieve radial alignment and positioning of the motor 1.
The construction of the positioning washer shown in fig. 3 (b) -3 (c) is slightly different from that shown in fig. 3 (a). In fig. 3 (b), each claw 8' is formed integrally with each wave-shaped protrusion 6, and is formed in the form of a tab extending outwardly from the outer edge of the wave-shaped protrusion 6 and in a direction away from the main body of the motor (obliquely upward in the figure). When the top journal of the motor 1 is interference fitted over the plurality of radial stop bars 7, the ends of the tabs rest against the cavity walls of the housing receiving cavity 2 for receiving the motor 1 to radially guide the motor 1 (see in particular fig. 4).
The structure shown in fig. 3 (c) differs from that shown in fig. 3 (b) mainly in that the end of the claw 8 "in the form of a tab in fig. 3 (c) has a downward bend by means of which the tab abuts against the cavity wall of the housing receiving cavity 2 to provide radial guidance of the motor 1.
Depending on the accuracy of the dimensional fit, the above-described positioning washers are used primarily for the radial pre-positioning of the motor when fixing the motor 1, while the final precise positioning of the motor in the radial direction and the final fixing in the axial direction also have to be achieved by means of the fixing end cap 4.
As shown in fig. 5 and 6 (a) -6 (b), the fixed end cap 4 comprises a first section 13 of a first diameter cooperating with the bearing chamber of the electric machine 1 in precision dimensions and a second section 15 of a second diameter cooperating with the circumferential flange 14 of the cavity wall of the housing receiving cavity 2, said first section 13 being arranged concentrically with said second section 15 and said first diameter being smaller than said second diameter.
Advantageously, the fixed end cap 4 further comprises a protrusion 16 protruding into the second section 15, provided at the transition between the first section 13 and the second section 15, the inner side of this protrusion 16 following the inner side of said first section 13, thus enabling to lengthen the mating length of the bearing chamber of the motor with the first section 13, ensuring the reliability of the mating while avoiding its interference with the positioning washer 3.
The fixed end cap is in an initial state in a structural form as shown in fig. 6 (a). When the stationary end cap 4 is press-fitted onto the outer wall of the actuator housing until the stationary end cap 4 is in contact with the end surface of the receiving groove 18 for receiving the sealing ring 17 (fig. 5), the end of the second section 15 of the stationary end cap 4 is bent inwards by an external force to form a snap-fit, as shown in fig. 6 (b), whereby the stationary end cap 4 is snap-fitted onto the circumferential flange 14 of the cavity wall of the housing receiving cavity, at which time the sealing ring 17 is fully pressed into the receiving groove 18 sealing the housing, while the positioning washer 3 is compressed between the motor 1 and the stationary end cap 4 to provide an axial pre-tension.
Referring to fig. 7 (a) -7 (b), a locating pin 19 protrudes upwardly from the bottom of the housing receiving cavity of the actuator, which locating pin 19 is intended to cooperate with a corresponding notch 20 arranged in the bottom of the motor, thereby together forming a rotation limiting structure limiting the circumferential rotation of the motor 1 within the housing receiving cavity 2.
By using the positioning washer 3, the fixed end cover 4 and the rotation limiting structure, reliable fixation of the motor can be realized. The method for fixing the motor by the fixing device mainly comprises the following steps:
inserting the motor 1 into the housing receiving cavity 2 for receiving said motor 1 while ensuring an accurate insertion of the motor pin needle into the lead frame; preferably, when inserting the motor 1 into the housing receiving cavity 2, the notch 20 arranged at the bottom of the motor is sleeved on the positioning pin 19 which is arranged at the bottom of the housing receiving cavity 2 and protrudes upwards, so that the circumferential rotation of the motor in the housing receiving cavity is limited;
-interference fitting the positioning washer 3 on the top journal of the electric motor 1 and pre-positioning the electric motor 1 in the radial direction by means of a second structure of the positioning washer 3, comprising jaws and radial stop bars;
placing the sealing ring 17 in a receiving groove 18 at the end of the housing receiving cavity, the height of the sealing ring 17 being greater than the depth of said receiving groove 18;
pressing down the stationary end cap 4 until the stationary end cap 4 contacts the surface of the receiving groove 18, at which time the bearing chamber of the electric machine 1 enters and fits precisely in the first section 13 of the stationary end cap 4 having the first diameter; and
the end of the second section 15 of the stationary end cap 4 having the second diameter is bent inwards by an external force to form a snap fit with which the stationary end cap 4 is snap fitted onto the circumferential flange 14 of the cavity wall of the housing receiving cavity 2, at which time the sealing ring 17 is fully pressed into the receiving groove 18 sealing the housing, the positioning washer 3 being compressed between the motor 1 and the stationary end cap 4 to provide an axial pre-tightening force against the motor 1.
From the above, it can be seen that the motor fixing method implemented by the fixing device according to the present invention eliminates the problems of loosening caused by radial or axial displacement caused by vibration, early failure of the actuator caused by greater wear, and the like in the prior art. In a development of the invention, both the motor pin needle and the conductor are arranged in the same part, namely the actuator housing, so that the relative displacement due to the vibrations is small.
It should be noted that the above-described embodiments should be regarded as illustrative only, and the present invention is not limited to these embodiments. Many changes and modifications may be made by one skilled in the art without departing from the scope or spirit of the invention, by considering the contents of this specification. The true scope of the invention is defined by the following claims and their equivalents.
Claims (13)
1. A positioning washer (3) for an electric motor, the positioning washer comprising a washer body (5), the washer body (5) being provided with a central through hole (12) through which a tip of the electric motor (1) passes, characterized in that the positioning washer (3) comprises a first structure that can be compressed in an axial direction to provide an axial pre-tightening force for the electric motor (1) and a second structure that can guide and position the electric motor (1) in a radial direction; the first structure comprises a plurality of circumferentially spaced flexible wave-shaped protrusions (6) extending outwardly from the outer edge of the gasket body (5), and the second structure comprises a plurality of jaws (8), each jaw being formed between two adjacent wave-shaped protrusions (6), and comprising a first portion (9) extending radially outwardly from the gasket body (5) and a second portion (10) extending from the first portion (9) towards the main body of the motor.
2. The positioning washer (3) of claim 1, characterized in that the second structure further comprises a plurality of radial stop ribs (7) distributed uniformly in circumferential direction along the inner wall of the central through hole (12), the plurality of radial stop ribs (7) being in interference fit with the top journal of the motor (1).
3. The positioning washer (3) according to claim 2, characterized in that with the top journal of the motor (1) interference-fitted over the plurality of radial stop ribs (7), the second portion (10) of each jaw (8) is inserted into a radial gap (11) between a housing receiving cavity (2) for receiving the motor (1) and the motor (1), wherein the radial gap (11) is occupied by the thickness of the second portion (10) of the jaw (8).
4. A positioning washer (3) for an electric motor, the positioning washer comprising a washer body (5), the washer body (5) being provided with a central through hole (12) through which a tip of the electric motor (1) passes, characterized in that the positioning washer (3) comprises a first structure that can be compressed in an axial direction to provide an axial pre-tightening force for the electric motor (1) and a second structure that can guide and position the electric motor (1) in a radial direction; the first structure comprises a plurality of circumferentially spaced flexible wave-shaped protrusions (6) extending outwardly from the outer edge of the gasket body (5), and the second structure comprises a plurality of jaws (8', 8 "), each jaw being integrally formed with each wave-shaped protrusion (6) and being formed in the form of a tab extending radially outwardly from the outer edge of the wave-shaped protrusion (6) and in a direction away from the main body of the motor.
5. The positioning washer (3) of claim 4, characterized in that the second structure further comprises a plurality of radial stop ribs (7) distributed uniformly in circumferential direction along the inner wall of the central through hole (12), the plurality of radial stop ribs (7) being in interference fit with the top journal of the motor (1).
6. The positioning washer according to claim 5, characterized in that, with the top journal of the motor interference fitted over the plurality of radial stop ribs (7), the tip of each jaw abuts against the cavity wall of a housing receiving cavity (2) for receiving the motor (1) to radially guide the motor.
7. A positioning washer according to claim 5, characterized in that the end of the claw (8 ") has a bend in the direction of the body of the motor, which, in the case of an interference fit of the top journal of the motor on the radial stop ribs (7), rests against the cavity wall of the housing receiving cavity (2) for receiving the motor (1) for radially guiding the motor.
8. A fixing device, characterized by comprising a positioning washer (3) according to any one of claims 1 to 7 and a fixing end cap (4) for connection to a housing of an electric motor for enclosing the electric motor, the positioning washer (3) being used for radial pre-positioning and axial pre-tightening of the electric motor (1), the fixing end cap (4) being used for radial accurate positioning and axial fixing of the electric motor (1), the first structure in the positioning washer (3) being compressed by the fixing end cap for providing an axial pre-tightening force to the electric motor.
9. The fastening device according to claim 8, characterized in that the fastening end cap (4) is snap-connected to a circumferential flange (14) of a chamber wall of a housing receiving chamber (2) of the electric machine (1), the fastening end cap (4) comprising a first section (13) with a first diameter cooperating with a bearing chamber of the electric machine (1) in precise dimensions and a second section (15) with a second diameter cooperating with the circumferential flange (14), the first section (13) being arranged concentrically with the second section (15) and the first diameter being smaller than the second diameter.
10. The fastening device according to claim 9, characterized in that the fastening end cap (4) further comprises a projection (16) arranged at the transition between the first section (13) and the second section (15) projecting into the second section, the inner side of which projection follows the inner side of the first section.
11. The fixture according to any one of claims 8 to 10, further comprising a rotation limiting structure comprising an upwardly projecting locating pin (19) arranged at the bottom of a housing receiving cavity (2) receiving the motor (1), the locating pin being intended to cooperate with a corresponding notch (20) arranged at the bottom of the motor, thereby limiting circumferential rotation of the motor within the housing receiving cavity.
12. A method of securing an electric machine by means of a securing device according to any one of claims 8 to 11, characterized in that the method comprises the steps of:
-inserting the motor (1) into a housing receiving cavity (2) for receiving said motor while ensuring an accurate insertion of the pin needles of the motor into the lead frame;
-interference fitting the positioning washer (3) on the top journal of the electric machine (1) and pre-positioning the electric machine (1) in radial direction by means of a second structure of the positioning washer (3);
-placing a sealing ring (17) in a receiving groove (18) at the end of the housing receiving cavity (2), the sealing ring having a height greater than the depth of the receiving groove;
-pressing down the stationary end cap (4) until it contacts the surface of the receiving groove (18), at which time the bearing chamber of the motor enters and fits exactly in the first section (13) of the stationary end cap (4) having the first diameter; and
-bending the end of the second section (15) of the stationary end cap (4) with the second diameter inwards by an external force to form a snap-fit with which the stationary end cap is snap-fitted onto the circumferential flange (14) of the cavity wall of the housing receiving cavity, with the sealing ring (17) fully pressed into the receiving groove (18) to seal the housing, the positioning washer (3) being compressed between the motor (1) and the stationary end cap (4) to provide an axial pre-tightening force for the motor.
13. The method of claim 12, further comprising the step of:
-upon insertion of the motor (1) into a housing receiving cavity (2) for receiving the motor, a notch (20) arranged at the bottom of the motor is nested on an upwardly protruding locating pin (19) arranged at the bottom of the housing receiving cavity (2), thereby limiting circumferential rotation of the motor within the housing receiving cavity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010786518.8A CN114069943B (en) | 2020-08-07 | 2020-08-07 | Positioning washer for an electric machine, fixing device and method for fixing an electric machine |
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| CN202010786518.8A CN114069943B (en) | 2020-08-07 | 2020-08-07 | Positioning washer for an electric machine, fixing device and method for fixing an electric machine |
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| CN114069943A CN114069943A (en) | 2022-02-18 |
| CN114069943B true CN114069943B (en) | 2024-03-22 |
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| JP4527145B2 (en) * | 2007-11-12 | 2010-08-18 | 三菱電機株式会社 | Electric power steering motor |
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|---|---|---|---|---|
| CN203660849U (en) * | 2013-11-13 | 2014-06-18 | 上海航天汽车机电股份有限公司汽车机电分公司 | Direct-current motor gasket assembly |
| CN104702001A (en) * | 2013-12-09 | 2015-06-10 | 东明机电（深圳）有限公司 | Small or miniature motor and wave shape elastic gasket thereof |
| CN107427645A (en) * | 2015-03-27 | 2017-12-01 | 诺和诺德股份有限公司 | Deformable piston packing ring |
| CN108603526A (en) * | 2015-12-01 | 2018-09-28 | 伊利诺斯工具制品有限公司 | Washer for fastening clips component |
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| CN114069943A (en) | 2022-02-18 |
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