CN110224539B - Motor damping structure for electronic actuator - Google Patents

Abstract

The invention discloses a motor damping structure for an electronic actuator, which comprises: a motor main body; the mounting seat is fixedly connected to the top of the motor main body; and the damping support is supported at the bottom of the motor main body, wherein a front fixing lug and a rear fixing lug which are oppositely arranged are formed on the mounting seat, and a front fixing hole and a rear fixing hole are respectively formed in the front fixing lug and the rear fixing lug. According to the invention, the structure is compact, the weight is light, the installation stability of the motor is improved, and meanwhile, the design of the integrated multi-spring-piece is adopted, so that the problems of poor matching performance, easiness in loosening and the like of the traditional split type damping spring piece are avoided, and the damping effect is greatly improved.

Description

Motor damping structure for electronic actuator

Technical Field

The invention relates to the field of electronic actuators, in particular to a motor damping structure for an electronic actuator.

Background

The existing turbocharger generally adopts a pneumatic actuator to ensure that the engine obtains sufficient air supply in low and medium speed ranges, so that the engine can adapt to the fuel supply increased by the turbocharger in a combustion chamber, the low-speed torque is increased, the fuel combustion utilization rate is improved, and the excessive combustion pressure in a cylinder, the mechanical load of the engine and the like caused by the overspeed of a supercharger rotor or the overhigh supercharging pressure in a high-speed range are avoided through exhaust and air release. That is, the turbocharger adopts the exhaust bleed valve, and the emphasis is to improve the low-speed torque characteristic of the engine and simultaneously give consideration to the performance index and the use reliability of the engine during high-speed running.

The opening and closing of the pneumatic actuator is automatically controlled by the boost pressure, the boost pressure at the outlet of the compressor is introduced into a closed pressure chamber of the air bleeding valve regulator, when the boost pressure reaches or exceeds a specified value, the diaphragm overcomes the spring force on the left side and moves leftwards together with the linkage push rod to push the rocker arm to rotate around the pin shaft, so that the air bleeding valve is opened, the air bleeding of the exhaust bypass is realized, and the increase of the rotating speed of the supercharger is controlled.

The existing mechanical air release valve has the defects that the pressure rising curve and the pressure reducing curve of the spring PC-LC are inconsistent, so that the control pressure of the air release valve in the turbocharger is unstable in the pressure rising and pressure reducing processes to cause the loss of waste gas energy, and the energy consumption of an engine is reduced and the fuel utilization rate is improved. The response speed of the pneumatic actuator is relatively slow and time consuming, and the overall turbocharger control is relatively inaccurate due to pneumatic control. In order to improve this situation, an electronic actuator is developed in the market to improve the engine performance, the fuel combustion efficiency, and reduce the exhaust emission.

The electronic actuator has higher requirement on the self-damping of the motor during working, and the existing motor damping support has the following problems: firstly, the motor is not firm to mount and fix, and is easy to loosen after being used for a long time; secondly, the structure is complex, the weight is large, and the requirement of light weight of modern automobile design cannot be met; finally, the shock absorption elastic sheet adopts a plurality of independent individual body type structures, the integrity is poor, and the shock absorption effect is not obvious.

In view of the above, it is necessary to develop a motor damping structure for an electronic actuator to solve the above problems.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the motor damping structure for the electronic actuator, which is compact in structure and light in weight, improves the installation stability of the motor, adopts an integrated multi-spring-piece design, avoids the problems of poor matching performance, easiness in loosening and the like of the traditional split type damping spring piece, and greatly improves the damping effect.

To achieve the above objects and other advantages in accordance with the present invention, there is provided a motor damping structure for an electronic actuator, including:

a motor main body;

the mounting seat is fixedly connected to the top of the motor main body; and

a shock absorption bracket supported at the bottom of the motor main body,

wherein, be formed with preceding fixed ear and the fixed ear of back of relative setting on the mount pad, preceding fixed ear and fixed ear of back are seted up preceding fixed orifices and back fixed orifices respectively.

Preferably, the power output end of the motor main body is located between the front fixing hole and the rear fixing hole.

Preferably, the circle center of the front fixing hole, the center of the power output end and the circle center of the rear fixing hole are not collinear.

Preferably, assuming that a connecting line between the center of the front fixing hole and the center of the power output end is a straight line L1, and a connecting line between the center of the rear fixing hole and the center of the power output end is a straight line L2, an included angle β is formed between the straight line L1 and the straight line L2.

Preferably, the included angle β has an angle size of 165 ° to 175 °.

Preferably, the shock-absorbing bracket includes:

a fixing ring; and

at least three damping elastic sheets arranged at intervals along the circumferential direction of the fixing ring,

wherein, the shock attenuation shell fragment includes the shell fragment body and forms the backing sheet at the first and last both ends of shell fragment body, and the shock attenuation shell fragment passes through shell fragment body and solid fixed ring integrated into one piece.

Preferably, the supporting piece extends obliquely downwards from the end of the elastic piece body, so that an included angle θ is formed between the supporting piece and the elastic piece body.

Preferably, the angle of the included angle θ is 100 ° to 155 °.

Preferably, the end of the support piece is bent obliquely upward to form a bent portion.

Preferably, the bending part comprises a first bending section and a second bending section, and one end of the first bending section is smoothly connected with the tail end of the support sheet and is bent upwards.

Compared with the prior art, the invention has the beneficial effects that: its compact structure, light in weight when improving the motor installation steadiness, adopts the design of the many shell fragments of integral type, avoids traditional split type shock attenuation shell fragment cooperation poor, the easy pine to take off the scheduling problem, has improved the shock attenuation effect greatly.

Drawings

Fig. 1 is a three-dimensional structural view of a motor damping structure for an electronic actuator according to the present invention;

fig. 2 is a front view of a motor damping structure for an electronic actuator according to the present invention;

fig. 3 is a left side view of a motor damping structure for an electronic actuator according to the present invention;

fig. 4 is a bottom view of a motor damping structure for an electronic actuator according to the present invention;

fig. 5 is a plan view of a motor damping structure for an electronic actuator according to the present invention;

fig. 6 is a three-dimensional structural view of a shock-absorbing mount in a motor shock-absorbing structure for an electronic actuator according to the present invention;

fig. 7 is a bottom view of a shock-absorbing bracket in a motor shock-absorbing structure for an electronic actuator according to the present invention;

fig. 8 is a front view of a shock-absorbing resilient plate in a shock-absorbing structure of a motor for an electronic actuator according to the present invention.

Detailed Description

The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, which will enable those skilled in the art to practice the present invention with reference to the accompanying specification. In the drawings, the shape and size may be exaggerated for clarity, and the same reference numerals will be used throughout the drawings to designate the same or similar components. In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, and the like are used based on the orientation or positional relationship shown in the drawings. In particular, "height" corresponds to the dimension from top to bottom, "width" corresponds to the dimension from left to right, and "depth" corresponds to the dimension from front to back. These relative terms are for convenience of description and are not generally intended to require a particular orientation. Terms concerning attachments, coupling and the like (e.g., "connected" and "attached") refer to a relationship wherein structures are secured or attached, either directly or indirectly, to one another through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise.

Referring to fig. 1 to 5, a motor damping structure 3 for an electronic actuator includes:

a motor main body 31;

a mounting seat 32 fixedly connected to the top of the motor main body 31; and

a damper bracket 33 supported at the bottom of the motor main body 31,

the mounting base 32 is formed with a front fixing lug 321 and a rear fixing lug 322, which are oppositely disposed, and the front fixing lug 321 and the rear fixing lug 322 are respectively provided with a front fixing hole 3211 and a rear fixing hole 3221.

Further, the power output end 311 of the motor main body 31 is located between the front fixing hole 3211 and the rear fixing hole 3221.

Referring to fig. 5, the center of the front fixing hole 3211, the center of the power output end 311, and the center of the rear fixing hole 3221 are not collinear. By adopting the arrangement mode, the impact force transmitted to the top of the motor from the bottom of the motor can be balanced, and the motor is prevented from generating more resonances when rotating at a high speed, so that the motor cannot bear fatigue caused by resonances for a long time, and finally the motor is damaged.

Further, assuming that a connecting line between the center of the front fixing hole 3211 and the center of the power output end 311 is a straight line L1, and a connecting line between the center of the rear fixing hole 3221 and the center of the power output end 311 is a straight line L2, an included angle β is formed between the straight line L1 and the straight line L2.

Further, the included angle β is 165 ° to 175 °. In one embodiment, the included angle β has an angular magnitude of 165 °; in another embodiment, the included angle β has an angular magnitude of 175 °; in a preferred embodiment, the angle of the angle β is 170 °.

Referring to fig. 6 to 8, the damper bracket 33 includes:

a fixing ring 331; and

at least three shock-absorbing resilient pieces 332 arranged at intervals in the circumferential direction of the fixing ring 331,

the shock absorbing elastic piece 332 includes an elastic piece body 3321 and support pieces 3322 formed at the first end and the last end of the elastic piece body 3321, and the shock absorbing elastic piece 332 is integrally formed with the fixing ring 331 through the elastic piece body 3321. The damper bracket 33 is fixed to the bottom of the motor main body 31 by fixing rings 331.

Referring to fig. 6 and 8, the supporting piece 3322 extends obliquely downward from the end of the elastic piece body 3321, so that an included angle θ is formed between the supporting piece 3322 and the elastic piece body 3321. Because the motor is elastically supported and overhead by the supporting pieces 3322, the supporting pieces 3322 effectively absorb the self vibration of the motor, and simultaneously can prevent the motor from colliding with the shell, thereby reducing the vibration of the whole machine.

Further, the included angle theta is 100-155 degrees. In a preferred embodiment, the angle θ has an angular magnitude of 136 °. Adopt the structural style that the symmetry formula set up backing sheet 3322, can make the equal opposite direction of feedback force size that shell fragment body 3321 received, make feedback force can mostly offset each other in the absorbing to absorbed vibrations impact force, improved the shock attenuation effect.

Further, the end of the supporting piece 3322 is bent obliquely upward to form a bent portion 3333.

Further, the bending portion 3333 includes a first bending section S1 and a second bending section S2, and one end of the first bending section S1 is smoothly connected to the end of the supporting piece 3322 and is bent upward. Therefore, a smooth supporting point is formed between the first section S1 and the tail end of the supporting piece 3322, so that the tail end of the supporting piece 3322 and the supporting surface can slide smoothly, the supporting piece 3322 can absorb impact force generated by vibration through deformation of the supporting piece 3322, and the shock absorption effect is further improved.

Further, the second bending section S2 is smoothly connected to one end of the first bending section S1 and extends horizontally.

In a preferred embodiment, the second bent section S2 ends higher than the lowest portion of the first bent section S1. Therefore, when the supporting piece 3322 is impacted by the second bending section S2, the second bending section S2 can be prevented from being scraped with the supporting surface, and the sliding smoothness between the end of the supporting piece 3322 and the supporting surface is further improved.

In a preferred embodiment, the outer sides of the elastic piece body 3321 and the supporting piece 3322 are located on the same circumference, and the circumference is concentric with the fixing ring 331. Referring to fig. 5, the outer sides of the elastic sheet body 3321 and the supporting piece 3322 do not exceed the outer side of the bottom of the motor main body 31, so that interference of the motor to the motor main body 31 during installation can be prevented, the motor main body 31 can be prevented from rubbing the motor installation groove in a vibration process, and the durability of the motor is improved.

In a preferred embodiment, the number of the shock absorbing spring pieces 332 is an odd number. The arrangement of the odd damping elastic pieces 332 can balance the impact force at the bottom of the motor and prevent the motor from generating more resonances when rotating at a high speed, so that the motor cannot bear fatigue caused by resonances for a long time, and finally the motor is damaged.

The number of apparatuses and the scale of the process described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.

While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.

Claims (3)

1. A motor dampening structure for an electronic actuator, comprising:

a motor main body (31);

a mounting seat (32) fixedly connected to the top of the motor main body (31); and

a shock-absorbing bracket (33) supported at the bottom of the motor main body (31),

wherein, a front fixing ear (321) and a rear fixing ear (322) which are oppositely arranged are formed on the mounting seat (32), and a front fixing hole (3211) and a rear fixing hole (3221) are respectively formed on the front fixing ear (321) and the rear fixing ear (322);

the power output end (311) of the motor main body (31) is positioned between the front fixing hole (3211) and the rear fixing hole (3221);

the circle center of the front fixing hole (3211), the center of the power output end (311) and the circle center of the rear fixing hole (3221) are not collinear;

the shock-absorbing mount (33) comprises:

a fixed ring (331); and

at least three shock absorbing elastic sheets (332) arranged at intervals along the circumferential direction of the fixing ring (331),

the damping elastic sheet (332) comprises an elastic sheet body (3321) and support sheets (3322) formed at the first end and the last end of the elastic sheet body (3321), and the damping elastic sheet (332) is integrally formed with the fixing ring (331) through the elastic sheet body (3321);

the supporting piece (3322) extends obliquely downwards from the end part of the elastic sheet body (3321) so that an included angle theta is formed between the supporting piece (3322) and the elastic sheet body (3321);

the tail end of the supporting piece (3322) is bent upwards in an inclined mode to form a bent part (3333);

assuming that a connecting line between the circle center of the front fixing hole (3211) and the center of the power output end (311) is a straight line L1, and a connecting line between the circle center of the rear fixing hole (3221) and the center of the power output end (311) is a straight line L2, an included angle beta is formed between the straight line L1 and the straight line L2;

the bending part (3333) comprises a first bending section (S1) and a second bending section (S2), and one end of the first bending section (S1) is smoothly connected with the tail end of the supporting sheet (3322) and is bent upwards.

2. The motor damping structure for an electronic actuator according to claim 1, wherein the angle β has an angle size of 165 ° to 175 °.

3. The motor damping structure for an electronic actuator according to claim 1, wherein the angle θ has an angle of 100 ° to 155 °.

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