阅读说明：本技术 电动相位调节器 (Electric phase adjuster ) 是由 陈鹏 邓猛 胡胜龙 胡荣 蒋长路 于 2019-11-05 设计创作，主要内容包括：本发明公开了电动相位调节器,属于凸轮轴相位调节器技术领域,其主要包括有可随曲轴一并转动的链轮,设置于链轮内的主齿轮,以及同轴转动连接在链轮内且与凸轮轴同轴固连的从动部,所述从动部和链轮在轴向上相固定,所述链轮的内周上设置有沿其周向延伸的内齿,所述主齿轮和内齿相啮合,以构成正号的行星减速齿轮副,从而使整个电动相位调节器在面对电机失效的情况时,能利用电机的阻力矩带动凸轮轴自动复位至其初始相位,避免发动机出现异响以及异常停机的现象。(The invention discloses an electric phase adjuster, which belongs to the technical field of camshaft phase adjusters and mainly comprises a chain wheel, a main gear and a driven part, wherein the chain wheel can rotate along with a crankshaft, the main gear is arranged in the chain wheel, the driven part is coaxially and rotatably connected in the chain wheel and coaxially and fixedly connected with the camshaft, the driven part and the chain wheel are axially fixed, inner teeth extending along the circumferential direction of the chain wheel are arranged on the inner circumference of the chain wheel, and the main gear is meshed with the inner teeth to form a plus planetary reduction gear pair, so that the whole electric phase adjuster can drive the camshaft to automatically reset to the initial phase by using the resistance moment of a motor when facing the condition that the motor fails, and the phenomena of abnormal sound and abnormal shutdown of an engine are avoided.)

1. Electric phase adjuster, its characterized in that: the chain wheel comprises a chain wheel which can rotate along with a crankshaft, a main gear arranged in the chain wheel and a driven part which is coaxially connected in the chain wheel in a rotating way, wherein the driven part is coaxially and fixedly connected with a camshaft, the driven part, the main gear and the chain wheel are axially fixed, inner teeth extending along the circumferential direction of the chain wheel are arranged on the inner circumference of the chain wheel, the main gear is meshed with the inner teeth, and the number of teeth of the main gear is less than that of the inner teeth; the eccentric shaft is penetrated into the main gear and the driven part simultaneously, the eccentric part of the eccentric shaft is rotationally connected with the main gear, so that the rotation of the eccentric shaft can drive the main gear to do planetary motion around the axis of the chain wheel, and the coaxial part of the eccentric shaft is rotationally connected with the driven part.

2. An electric phase adjuster according to claim 1, wherein: the driven part mainly comprises an output flange cover and a support flange cover which are sequentially arranged along the axial direction of the driven part, the output flange cover is used for being connected with the camshaft, the output flange cover and the support flange cover are fixedly connected, and intervals are reserved between the output flange cover and the support flange cover in the axial direction, so that an accommodating space capable of accommodating the main gear is formed, and the end faces of the two ends of the main gear are in sliding contact with the end faces of the output flange cover and the support flange cover respectively.

3. An electric phase adjuster according to claim 2, wherein: and an annular flange which protrudes and extends into the accommodating space is formed on the inner periphery of the chain wheel and is clamped between the output flange cover and the end surface of the support flange cover.

4. An electric phase adjuster according to claim 3, wherein: the internal teeth are provided on the inner periphery of the annular flange.

5. An electric phase adjuster according to claim 3, wherein: and a first support ring surface which is in rotary contact with the outer periphery of the output flange cover and a second support ring surface which is in rotary contact with the outer periphery of the support flange cover are formed on the inner periphery of the chain wheel.

6. An electric phase adjuster according to claim 5, wherein: the first support ring surface and the second support ring surface are respectively positioned at two sides of the annular flange.

7. An electric phase adjuster according to claim 2, wherein: the eccentric shaft penetrates into the output flange cover and the support flange cover simultaneously, and the coaxial part of the eccentric shaft is respectively in rotary connection with the output flange cover and the support flange cover.

8. An electric phase adjuster according to claim 2, wherein: the output flange cover and the support flange cover are fixedly connected through a plurality of connecting structures which are arranged between the output flange cover and the support flange cover and penetrate through the main gear, and the connecting structures are arranged at intervals along the circumferential direction of the driven part.

9. An electric phase adjuster according to claim 8, wherein: the connecting structure mainly comprises a connecting boss which is integrally formed with the output flange cover and penetrates through the main gear, and a connecting screw which penetrates through the support flange cover and is in threaded connection with the connecting boss.

10. An electric phase adjuster according to claim 9, wherein: a movable gap is reserved between the connecting boss and the main gear.

Technical Field

The invention relates to the technical field of camshaft phase adjusters, in particular to an electric phase adjuster.

Background

A camshaft phase adjuster is a device for adjusting the rotational angle of a camshaft relative to a crankshaft, and controls the timing of opening and closing a valve to improve the efficiency of a gas engine. At present, phase adjusters can be classified into an electric phase adjuster and a hydraulic phase adjuster according to different operation modes. Among them, the invention patent document with publication number CN208330480U discloses an electric phase adjuster, which mainly uses a minus single-stage planetary reduction gear pair to realize phase adjustment for a camshaft. Although the electric phase adjuster has the advantages of small geometric dimension, high transmission efficiency and the like, the negative single-stage planetary reduction gear pair is adopted, so that when the motor fails, the resistance torque of the motor can enable the phase of an engine camshaft to be adjusted forwards and cannot return to the initial phase, and the phenomena of abnormal noise, abnormal shutdown and the like of the engine are caused.

Disclosure of Invention

In summary, the technical problems solved by the present invention are: a novel electric phase adjuster is provided that can be reset to its initial phase in the event of a motor failure.

The scheme adopted by the invention for solving the technical problems is as follows:

the electric phase adjuster comprises a chain wheel capable of rotating along with a crankshaft, a main gear arranged in the chain wheel and a driven part coaxially and rotatably connected in the chain wheel, wherein the driven part and the chain wheel can coaxially and relatively rotate, the driven part, the main gear and the chain wheel are axially fixed, inner teeth extending along the circumferential direction of the chain wheel are arranged on the inner circumference of the chain wheel, the main gear is meshed with the inner teeth, and the number of teeth of the main gear is smaller than that of the inner teeth; the eccentric shaft is penetrated into the main gear and the driven part simultaneously, the eccentric part of the eccentric shaft is rotationally connected with the main gear, so that the rotation of the eccentric shaft can drive the main gear to do planetary motion around the axis of the chain wheel, and the coaxial part of the eccentric shaft is rotationally connected with the driven part.

It is understood that the eccentric shaft is mainly composed of an eccentric portion and a coaxial portion, and the axis of the eccentric portion is parallel to but not coincident with the axis of the coaxial portion. And the eccentric shaft and the planetary gear correspond to each other, namely: the two are consistent in number and correspondingly connected together.

Furthermore, the driven part mainly comprises an output flange cover and a support flange cover which are sequentially arranged along the axial direction of the driven part, the output flange cover is used for being connected with the camshaft, the output flange cover is fixedly connected with the support flange cover, and a gap is reserved between the output flange cover and the support flange cover in the axial direction, so that an accommodating space for accommodating the main gear is formed, and the end faces of the two ends of the main gear are in sliding contact with the end faces of the output flange cover and the support flange cover respectively.

Furthermore, an annular flange which protrudes into the accommodating space and extends into the accommodating space is formed on the inner periphery of the chain wheel, and the annular flange is clamped between the output flange cover and the end face of the support flange cover.

Further, the internal teeth are provided on an inner periphery of the annular flange.

Furthermore, a first supporting ring surface which is in rotating contact with the outer periphery of the output flange cover and a second supporting ring surface which is in rotating contact with the outer periphery of the supporting flange cover are formed on the inner periphery of the chain wheel.

Further, the first support ring surface and the second support ring surface are respectively positioned on two sides of the annular flange.

Furthermore, the eccentric shaft penetrates into the output flange cover and the support flange cover simultaneously, and the coaxial part of the eccentric shaft is respectively in rotary connection with the output flange cover and the support flange cover.

Furthermore, the output flange cover and the support flange cover are fixedly connected through a plurality of connecting structures which are arranged between the output flange cover and the support flange cover and penetrate through the main gear, and the connecting structures are arranged at intervals along the circumferential direction of the driven part.

Furthermore, the connecting structure mainly comprises a connecting boss which is integrally formed with the output flange cover and penetrates through the main gear, and a connecting screw which penetrates through the support flange cover and is in threaded connection with the connecting boss.

Furthermore, a movable gap is reserved between the connecting boss and the main gear.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

(1) the invention sets the planetary reduction gear pair with positive sign to drive the cam shaft to automatically reset to the initial phase by using the resistance moment of the motor under the condition that the motor fails, thereby avoiding the phenomena of abnormal sound and abnormal shutdown of the engine.

(2) In the invention, the driven part mainly comprises an output flange cover and a support flange cover, and an accommodating space for accommodating the main gear is formed between the output flange cover and the support flange cover so as to ensure free sliding of the driving teeth relative to the driven part in the radial direction.

(3) In the present invention, since the eccentric shaft mainly applies force to the main gear through the eccentric portion thereof, in order to improve the stability thereof, in the present invention, the coaxial portion of the eccentric shaft is divided into two sections, which are respectively penetrated into the output flange cover and the support flange cover, so as to improve the support stability of the eccentric shaft.

Drawings

FIG. 1 is a schematic structural view of example 1 of the present invention;

FIG. 2 is a front view of embodiment 1 of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a cross-sectional view taken at B-B of FIG. 3;

FIG. 5 is a schematic structural view of the first support ring surface, the second support ring surface and the annular flange in embodiment 1 of the present invention;

fig. 6 is a schematic structural view of a support flange cover and an output flange cover in embodiment 1 of the present invention;

fig. 7 is a schematic structural view of an eccentric shaft in embodiment 1 of the present invention.

[ Specification of symbols ]

1-sprocket, 101-annular flange, 102-internal teeth, 103-first support ring surface, 104-second support ring surface, 2-main gear, 3-driven part, 301-output flange cover, 302-support flange cover, 4-sun gear, 5-planetary gear, 6-eccentric shaft, 601-eccentric part, 602-coaxial part, 7-connecting boss, 8-connecting screw, 9-movable gap, 10-camshaft.

Detailed Description

The electric phase adjuster provided by the present invention will be described in detail with reference to the accompanying drawings and embodiments.