阅读说明：本技术 一种部分回转电动执行机构用行程控制机构 (Stroke control mechanism for partial-rotation electric actuating mechanism ) 是由 王文杰 蔡军 汪正洪 徐文才 郭建辉 张宇 李德胜 汤占峰 徐荣 于 2021-03-18 设计创作，主要内容包括：一种部分回转电动执行机构用行程控制机构。提供了一种结构简单,方便操作,提高控制精度的部分回转电动执行机构用行程控制机构。包括压板、齿轮传动组件、开关底板、控制组件、开向行程开关和关向行程开关；所述开关底板通过支撑轴平行设在压板的上方,所述齿轮传动组件设在开关底板和压板之间、包括啮合的过渡齿轮一和过渡齿轮二,所述过渡齿轮一内用于连接行程轴,所述过渡齿轮二内用于连接转轴,所述转轴向上伸出开关底板；所述开向行程开关和关向行程开关分别设在开关底板上。本发明方便加工,控制可靠。(A stroke control mechanism for a partially rotary electric actuator. The stroke control mechanism for the partial rotary electric actuating mechanism has the advantages of simple structure, convenience in operation and improvement on control precision. The device comprises a pressing plate, a gear transmission assembly, a switch bottom plate, a control assembly, an opening travel switch and a closing travel switch; the switch bottom plate is arranged above the pressing plate in parallel through a supporting shaft, the gear transmission assembly is arranged between the switch bottom plate and the pressing plate and comprises a first transition gear and a second transition gear which are meshed with each other, the first transition gear is internally used for connecting a stroke shaft, the second transition gear is internally used for connecting a rotating shaft, and the rotating shaft extends upwards out of the switch bottom plate; the opening travel switch and the closing travel switch are respectively arranged on the switch bottom plate. The invention has convenient processing and reliable control.)

1. A stroke control mechanism for a partially-rotating electric actuator is characterized by comprising a pressure plate, a gear transmission assembly, a switch bottom plate, a control assembly, an opening stroke switch and a closing stroke switch;

the switch bottom plate is arranged above the pressure plate in parallel through a support shaft,

the gear transmission assembly is arranged between the switch bottom plate and the pressure plate and comprises a first transition gear and a second transition gear which are meshed with each other, the first transition gear is internally used for connecting a stroke shaft,

the transition gear II is internally connected with a rotating shaft, and the rotating shaft extends upwards out of the switch bottom plate;

the control assembly is arranged above the switch bottom plate and comprises a cam piece, a cushion cover and a shifting fork component, the cam piece, the cushion cover and the shifting fork component are sequentially arranged on the rotating shaft in a penetrating mode from bottom to bottom, the shifting fork component is used for driving the cam piece, and the cam piece is used for contacting an opening travel switch or closing the travel switch;

the opening travel switch and the closing travel switch are respectively arranged on the switch bottom plate.

2. The stroke control mechanism for a part-rotating electric actuator according to claim 1,

the shifting fork component comprises a supporting plate shaft sleeve, a supporting plate, a round head shaft, a disc spring, a shifting fork and a gasket, the supporting plate shaft sleeve is connected to the rotating shaft through a locking screw,

the bottom of the support plate shaft sleeve is provided with an annular groove,

one end of the support plate is provided with a connecting hole, the other end of the support plate is provided with a placing hole, the placing hole of the support plate is sleeved on the annular groove, the body of the round head shaft extends into the connecting hole, the bottom of the round head shaft is provided with an annular baffle groove, and the gasket is positioned in the annular baffle groove;

the shifting fork comprises a ring body and an inverted L-shaped push rod arranged on one side of the ring body, the body of the round head shaft extends into the ring body, and the disc spring is sleeved on the body of the round head shaft and positioned between the support plate and the ring body;

the cam sheet is provided with a shifting fork hole, and the push rod is positioned in the shifting fork hole.

3. The stroke control mechanism of claim 1 wherein said control assembly comprises at least one set.

4. The stroke control mechanism of claim 3, wherein the pad of the uppermost set of control elements is a support body, the support body is of a racetrack type and has a pair of perforations,

the stroke shaft extends upwards out of the switch bottom plate, and the stroke shaft and the rotating shaft respectively extend into the pair of through holes.

Technical Field

The invention relates to an electric actuating mechanism, in particular to a stroke control mechanism for a partially-rotating electric actuating mechanism.

Background

The stroke control mechanism is an important component in the electric actuator, and the control precision of the stroke control mechanism directly reflects the running precision of the electric actuator. At present, a cam is mostly adopted by a part of rotary electric actuating mechanisms as a stroke control scheme, and the cam serving as a stroke control mechanism has the problems of low control precision and poor repeatability.

Disclosure of Invention

Aiming at the problems, the invention provides the stroke control mechanism for the partial rotary electric actuating mechanism, which has the advantages of simple structure, convenient operation and improved control precision.

The technical scheme of the invention is as follows: the device comprises a pressing plate, a gear transmission assembly, a switch bottom plate, a control assembly, an opening travel switch and a closing travel switch;

the switch bottom plate is arranged above the pressure plate in parallel through a support shaft,

the gear transmission assembly is arranged between the switch bottom plate and the pressure plate and comprises a first transition gear and a second transition gear which are meshed with each other, the first transition gear is internally used for connecting a stroke shaft,

the transition gear II is internally connected with a rotating shaft, and the rotating shaft extends upwards out of the switch bottom plate;

the control assembly is arranged above the switch bottom plate and comprises a cam piece, a cushion cover and a shifting fork component, the cam piece, the cushion cover and the shifting fork component are sequentially arranged on the rotating shaft in a penetrating mode from bottom to bottom, the shifting fork component is used for driving the cam piece, and the cam piece is used for contacting an opening travel switch or closing the travel switch;

the opening travel switch and the closing travel switch are respectively arranged on the switch bottom plate.

The shifting fork component comprises a supporting plate shaft sleeve, a supporting plate, a round head shaft, a disc spring, a shifting fork and a gasket, the supporting plate shaft sleeve is connected to the rotating shaft through a locking screw,

the bottom of the support plate shaft sleeve is provided with an annular groove,

one end of the support plate is provided with a connecting hole, the other end of the support plate is provided with a placing hole, the placing hole of the support plate is sleeved on the annular groove, the body of the round head shaft extends into the connecting hole, the bottom of the round head shaft is provided with an annular baffle groove, and the gasket is positioned in the annular baffle groove;

the shifting fork comprises a ring body and an inverted L-shaped push rod arranged on one side of the ring body, the body of the round head shaft extends into the ring body, and the disc spring is sleeved on the body of the round head shaft and positioned between the support plate and the ring body;

the cam sheet is provided with a shifting fork hole, and the push rod is positioned in the shifting fork hole.

The control assembly comprises at least one group.

Wherein, the cushion cover positioned in the uppermost group of control components is a support body, the support body is in a runway shape, the support body is provided with a pair of through holes,

the stroke shaft extends upwards out of the switch bottom plate, and the stroke shaft and the rotating shaft respectively extend into the pair of through holes.

In the working process, a first transition gear and a second transition gear which are meshed with each other are arranged between the pressure plate and the switch bottom plate, and when a stroke shaft in the first transition gear moves, a rotating shaft in the second transition gear is driven to move; because the control assembly is arranged on the rotating shaft, the control assembly contacts the opening travel switch or closing travel switch to realize the opening and closing actions, and further control the starting and stopping control of the electric actuating mechanism.

The invention has convenient processing and reliable control.

Drawings

Figure 1 is a schematic diagram of the structure of the invention,

figure 2 is a second schematic structural view of the present invention,

figure 3 is a schematic view of the construction of the fork assembly,

in the figure, 1 is a pressing plate, 2 is a first transition gear, 3 is a second transition gear, 4 is a switch bottom plate, 5 is a cam piece, 50 is a shifting fork hole, 6 is a cushion cover, 7 is a locking screw, 8 is a shifting fork component, 9 is a support body, 10 is a rotating shaft, 11 is an off travel switch, 12 is an on travel switch, 13 is a support plate shaft sleeve, 130 is an annular groove, 14 is a support plate, 15 is a round head shaft, 16 is a disc spring, 17 is a shifting fork, 170 is a push rod, 18 is a gasket and 19 is a support shaft.

Detailed Description

The invention is shown in figures 1-3, and comprises a pressure plate 1, a gear transmission assembly, a switch bottom plate 4, a control assembly, an opening travel switch 12 and a closing travel switch 11;

the switch base plate 4 is arranged above the pressure plate 1 in parallel through a supporting shaft 19,

the gear transmission assembly is arranged between the switch bottom plate and the pressure plate and comprises a first transition gear 2 and a second transition gear 3 which are meshed with each other, the first transition gear is internally connected with a stroke shaft (not shown in the figure),

the transition gear II 3 is internally connected with a rotating shaft 10, and the rotating shaft 10 extends out of the switch bottom plate upwards;

the control assembly is arranged above the switch bottom plate and comprises a cam piece 5, a cushion cover 6 and a shifting fork part 8, the cam piece 5, the cushion cover 6 and the shifting fork part 8 are sequentially arranged on the rotating shaft in a penetrating mode from bottom to bottom, the shifting fork part is used for driving the cam piece, and the cam piece is used for contacting an opening travel switch or a closing travel switch;

the opening travel switch and the closing travel switch are respectively arranged on the switch bottom plate.

In the working process, a first transition gear and a second transition gear which are meshed with each other are arranged between the pressure plate and the switch bottom plate, and when a stroke shaft in the first transition gear moves, a rotating shaft in the second transition gear is driven to move; because the control assembly is arranged on the rotating shaft, the control assembly contacts the opening travel switch or closing travel switch to realize the opening and closing actions, and further control the starting and stopping control of the electric actuating mechanism.

The shifting fork component 8 comprises a support plate shaft sleeve 13, a support plate 14, a round head shaft 15, a disc spring 16, a shifting fork 17 and a gasket 18, the support plate shaft sleeve is connected on the rotating shaft through a locking screw,

the bottom of the fulcrum bushing 13 is provided with an annular groove 130,

one end of the support plate 14 is provided with a connecting hole, the other end of the support plate 14 is provided with a placing hole, the placing hole of the support plate 14 is sleeved on the annular groove 130, the body of the round-head shaft 15 extends into the connecting hole, the bottom of the round-head shaft is provided with an annular retaining groove, and the gasket 18 is positioned in the annular retaining groove;

the shifting fork 17 comprises a ring body and an inverted L-shaped push rod 170 arranged on one side of the ring body, the body of the round head shaft extends into the ring body, and the disc spring 16 is sleeved on the body of the round head shaft and is positioned between the support plate and the ring body;

the cam piece 5 is provided with a shifting fork hole 50, the push rod 170 is positioned in the shifting fork hole 50, and the cam piece is driven to move through the push rod.

When the device is used, a support plate shaft sleeve 13 in the shifting fork component 8 is fixedly connected with a support plate 14, a round head shaft 15 is in clearance fit with the support plate 14, a disc spring is arranged between the shifting fork and the support plate to keep a certain pretightening force, the pretightening force can ensure that the round head shaft 15 does not rotate in the process of pressing the switch by the cam piece 5, and the round head shaft can be manually rotated.

The control assembly comprises at least one group.

The number of the switches can be increased or decreased randomly according to the requirements of users, and the number of the cam sheets, the cushion covers, the shifting fork parts, the locking screws and the switches is only required to be changed in the increasing or decreasing process.

Wherein, the cushion cover positioned in the uppermost group of control components is a support body 9, the support body is in a runway shape and is provided with a pair of through holes,

the stroke shaft extends upwards out of the switch bottom plate, and the stroke shaft and the rotating shaft respectively extend into the pair of through holes.

In application, the first transition gear is fixedly connected with the stroke shaft through a fastening screw; the support body is sleeved on the stroke shaft in an empty mode, and the anti-seismic performance of the stroke control mechanism is only increased without transmitting motion.

In the invention, the stroke shaft of the electric actuating mechanism transfers the motion process to the first transition gear in the motion process, the first transition gear transfers the motion process to the second transition gear through meshing, the second transition gear transfers the motion to the shifting fork component through the rotating shaft, and then transfers the motion to the cam piece through the shifting fork in the shifting fork component, and further presses the switch (namely, opens the stroke switch and closes the stroke switch) through the cam piece.

The adjusting process is divided into a coarse adjusting part and a fine adjusting part, the coarse adjusting part changes the position of the shifting fork part by adjusting the installation position of the shifting fork part 8 on the rotating shaft, and then the position of the cam sheet pressing switch is changed. And when the rough adjustment is in place, locking the locking screw, so that the shifting fork component is fixed. If the coarse adjustment cannot meet the requirement of the field on the stroke control precision, the fine adjustment of the stroke switch can be realized through the fine adjustment. During fine adjustment, the angle of the shifting fork is adjusted by rotating the round head shaft, and then the fine adjustment of the angle of the cam piece is driven, so that the fine adjustment of the position of the cam piece pressing switch is realized.

The disclosure of the present application also includes the following points:

(1) the drawings of the embodiments disclosed herein only relate to the structures related to the embodiments disclosed herein, and other structures can refer to general designs;

(2) in case of conflict, the embodiments and features of the embodiments disclosed in this application can be combined with each other to arrive at new embodiments;

the above embodiments are only embodiments disclosed in the present disclosure, but the scope of the disclosure is not limited thereto, and the scope of the disclosure should be determined by the scope of the claims.