阅读说明：本技术 一种机械旋转限位装置及限位方法 (Mechanical rotation limiting device and limiting method ) 是由 王得良 王蓉 周月新 贾福鹏 刘露斌 于 2020-12-11 设计创作，主要内容包括：本发明属于舵机限位技术,涉及一种机械旋转限位装置及限位方法,可用于对包括舵机在内的各种旋转结构进行角度限位。目前舵机工作位移采用微动开关进行限制,安装空间大,安全系数低。本发明限位器盖中部具有空心轴,依次套装有若干限位圆盘、限位块、垫圈和限位垫片,并通过90°沉头螺钉和尼龙自锁螺母连接；限位圆盘具有一定角度范围的内环形槽和外环形槽；限位块在靠限位圆盘的端面上具有第一环形槽；在限位器盖上固定安装有内限位销轴,其自由端插入内环形槽中；中间限位销轴插入相邻限位圆盘的外环形槽和内环形槽中；外限位销轴一端插入第一环形槽和外环形槽中。利用限位销轴与限位块、限位圆盘的环形导向槽,形成可滑动键联接结构。(The invention belongs to a steering engine limiting technology, and relates to a mechanical rotation limiting device and a limiting method, which can be used for carrying out angle limiting on various rotating structures including a steering engine. At present, the working displacement of the steering engine is limited by a microswitch, the installation space is large, and the safety factor is low. The middle part of the limiter cover is provided with a hollow shaft, a plurality of limiting discs, limiting blocks, washers and limiting gaskets are sequentially sleeved on the limiting cover and are connected with a nylon self-locking nut through 90-degree countersunk screws; the limiting disc is provided with an inner annular groove and an outer annular groove within a certain angle range; the limiting block is provided with a first annular groove on the end surface close to the limiting disc; an inner limiting pin shaft is fixedly arranged on the limiter cover, and the free end of the inner limiting pin shaft is inserted into the inner annular groove; the middle limiting pin shaft is inserted into the outer annular groove and the inner annular groove of the adjacent limiting disc; one end of the outer limiting pin shaft is inserted into the first annular groove and the outer annular groove. A slidable key connecting structure is formed by utilizing the limiting pin shaft, the limiting block and the annular guide groove of the limiting disc.)

1. The utility model provides a rotatory stop device of machinery which characterized in that: the device comprises a nylon self-locking nut (1), a limiting cover (2), an outer limiting pin shaft (3), a gasket (4), a limiting gasket (5), a 90-degree countersunk head screw (6), a limiting block (7), an inner limiting pin shaft (9), a plurality of limiting discs and a plurality of middle limiting pin shafts;

the limiting device comprises a limiting device cover (2), a limiting disc, a limiting block (7), a gasket (4) and a limiting gasket (5), wherein the limiting device cover (2) is a supporting piece, the middle part of the limiting device cover is provided with a hollow shaft, and the hollow shaft is sequentially sleeved with the limiting discs, the limiting block (7), the gasket (4) and the limiting gasket (5) and is connected with a nylon self-locking nut (1) through a 90-degree;

the limiting disc is of a circular structure, an inner annular groove with a certain angle range is formed in the end face close to the inner side, and an outer annular groove with a certain angle range is formed in the end face close to the outer side;

the limiting block (7)) Is of a circular ring structure and has an angle range theta on the end surface close to the limiting disc₁The limiting block (7) is connected with a mechanical rotating component needing to be limited;

an inner limiting pin shaft (9) is fixedly arranged on the limiting cover (2), and the free end of the inner limiting pin shaft is inserted into the inner annular groove of the adjacent limiting disc; one end of the middle limiting pin shaft is inserted into the outer annular groove of the adjacent limiting disc, and the other end of the middle limiting pin shaft is inserted into the inner annular groove of the adjacent limiting disc;

one end of the outer limiting pin shaft (3) is inserted into the first annular groove (10), and the other end of the outer limiting pin shaft is inserted into the outer annular groove of the adjacent limiting disc.

2. The mechanical rotation limiting device of claim 1, wherein: each annular groove is semi-circular in shape at the end.

3. The mechanical rotation limiting device of claim 1, wherein: a proper number of gaskets (4) are selected to ensure that the stopper cover (2), the stopper disc (8) and the stopper (7) have a certain axial gap which is suitable for rotation.

4. The mechanical rotation limiting device of claim 3, wherein: the total axial clearance is not less than 0.1 mm.

5. The mechanical rotation limiting device of claim 1, wherein: during installation, grease is slightly applied between the rotating contact surfaces.

6. The mechanical rotation limiting device of claim 1, wherein: the limiting device cover (2), the limiting disc (8), the limiting block (7), the limiting gasket (5) and the 90-degree countersunk head screw (6) are made of 40CrNiMoA alloy steel materials.

7. A mechanical spacing device as claimed in claim 1, wherein: the gasket (4) is made of 1Cr18Ni9Ti stainless steel material.

8. A mechanical spacing device as claimed in claim 1, wherein: and the limiting cover (2), the limiting pin shafts, the limiting discs, the limiting blocks (7) and the limiting gaskets (5) are subjected to quenching and tempering.

9. A mechanical spacing device according to any of claims 1 to 8 wherein: a limiting disc (8) is adopted, a middle limiting pin shaft is not needed at the moment, and only an inner limiting pin shaft (9) and an outer limiting pin shaft (3) are adopted.

10. A mechanical rotation limiting method is characterized in that: the method using a mechanical stop device according to any of claims 1-9, comprising the steps of:

s1, selecting a proper limiting disc and a corresponding middle limiting pin shaft according to the required rotation limiting angle, and ensuring that the sum of the angles of the inner ring grooves, the sum of the angles of the outer ring grooves and the sum of the angles of the first ring grooves (10) of all the limiting discs are the required rotation limiting angle;

s2, rotating the limiting block (7) to a limit limiting position, rotating the mechanical rotating component to a corresponding limit position, and connecting the limiting block (7) with the mechanical rotating component needing to be limited;

and S3, when in use, the mechanical limiting device is used for limiting.

Technical Field

The invention belongs to a steering engine limiting technology, and relates to a mechanical rotation limiting device and a limiting method, which can be used for carrying out angle limiting on various rotating structures including a steering engine.

Background

At present, the steering engine working displacement is generally limited by a microswitch, and the working principle is that a button of the microswitch is rolled by a convex block rotating along with a steering engine drum wheel, and a motor or a clutch input circuit is disconnected, so that the steering engine displacement output is limited, and the flying posture of an airplane is controlled.

The defect of this scheme is that the use is limited in the working mode of steering wheel, and installation space is big, and factor of safety is low.

Disclosure of Invention

The purpose of the invention is: a mechanical rotation limiting device and a limiting method are provided, and the requirement of limiting the linear displacement of an output shaft of a tandem type electric control rudder machine is met.

The technical scheme of the invention is as follows: a mechanical rotation limiting device comprises a nylon self-locking nut, a limiting cover, an outer limiting pin shaft, a gasket, a limiting gasket, a 90-degree countersunk screw, a limiting block, an inner limiting pin shaft, a plurality of limiting discs and a plurality of middle limiting pin shafts;

the limiting device comprises a limiting device cover, a limiting disc, a limiting block, a gasket and a limiting gasket, wherein the limiting device cover is a supporting piece, the middle part of the limiting device cover is provided with a hollow shaft, and the hollow shaft is sequentially sleeved with the limiting discs, the limiting block, the gasket and the limiting gasket and is connected with a nylon self-locking nut through a 90-degree countersunk head screw;

the limiting disc is of a circular structure, an inner annular groove with a certain angle range is formed in the end face close to the inner side, and an outer annular groove with a certain angle range is formed in the end face close to the outer side;

the limiting block is of a circular ring-shaped structure, and the end face close to the limiting disc is provided with an angle range theta₁The limiting block is connected with a mechanical rotating component to be limited;

an inner limiting pin shaft is fixedly arranged on the limiter cover, and the free end of the inner limiting pin shaft is inserted into the inner annular groove of the adjacent limiting disc; one end of the middle limiting pin shaft is inserted into the outer annular groove of the adjacent limiting disc, and the other end of the middle limiting pin shaft is inserted into the inner annular groove of the adjacent limiting disc;

one end of the outer limiting pin shaft is inserted into the first annular groove, and the other end of the outer limiting pin shaft is inserted into the outer annular groove of the adjacent limiting disc.

Advantageously, each annular groove is semi-circular in shape at the end.

Advantageously, by choosing a suitable number of washers it is ensured that the stopper cap, the stopper disc and the stopper have a certain axial clearance relative to each other suitable for rotation.

Advantageously, the total axial clearance is not less than 0.1 mm.

Advantageously, upon installation, grease is applied slightly between the rotating contact surfaces.

Advantageously, the limiting cover, the limiting disc, the limiting block, the limiting gasket and the 90-degree countersunk head screw are made of 40CrNiMoA alloy steel materials.

Advantageously, the gasket is made of a 1Cr18Ni9Ti stainless steel material.

Advantageously, the limiter cover, the limiting pin shafts, the limiting discs, the limiting blocks and the limiting gaskets are subjected to thermal refining.

Advantageously, a limiting disc is adopted, a middle limiting pin shaft is not needed at the moment, and only an inner limiting pin shaft and an outer limiting pin shaft are adopted.

The invention also provides a mechanical rotation limiting method, which adopts the mechanical limiting device and comprises the following steps:

s1, selecting a proper limiting disc and a corresponding middle limiting pin shaft according to the required rotation limiting angle, and ensuring that the sum of the angles of the inner ring grooves, the sum of the angles of the outer ring grooves and the sum of the angles of the first ring grooves of all the limiting discs are the required rotation limiting angle;

s2, rotating the limiting block to a limit limiting position, rotating the mechanical rotating component to a corresponding limit position, and connecting the limiting block with the mechanical rotating component to be limited;

and S3, when in use, the mechanical limiting device is used for limiting.

The invention is characterized in that: the limiting cylinder, the limiting block and the annular guide groove of the limiting disc are utilized to form a slidable key connecting structure, the limiting pin column is utilized to transmit torque and limit, rotary motion is transmitted step by step, the superposition of rotation angles is realized, and the limiting device rotates within the angle range of the limiting device. The total rotation angle is determined by the combination of the limiting cylinder and the annular groove structure.

Drawings

FIG. 1 is a schematic sectional view of a mechanical limiting device of a steering engine according to the present invention;

FIG. 2 is a schematic cross-sectional view of a stopper cap;

FIG. 3 is a schematic view of a spacing disk;

fig. 4 is a schematic diagram of a limiting block.

Detailed Description

The present invention is described in further detail below. With reference to figure 1 of the drawings,

the utility model provides a rotatory stop device of machinery, includes nylon auto-lock nut 1, stopper lid 2, outer spacing round pin axle 3, packing ring 4, spacing gasket 5, 90 countersunk screw 6, stopper 7, spacing disc 8 and interior spacing round pin axle 9. The stopper cover 2 is a supporting piece, a hollow shaft is arranged at the middle protruding part of the cover body, a 90-degree countersunk head screw 6 penetrates through the hollow shaft, and all parts are fixed on the stopper cover 2 by a nylon self-locking nut 1. The limiting disc 8 is positioned between the limiting cover 2 and the limiting block 7, the gasket 4 and the limiting gasket 5 are arranged between the limiting disc 8 and the 90-degree countersunk head screw 6, the gasket 4 is close to the limiting disc 8, a certain axial gap suitable for rotation is formed among the limiting cover 2, the limiting disc 8 and the limiting block 7 by selecting a proper number of gaskets 4, and the total axial gap is not less than 0.1 mm.

The limiting block 7 is in a circular ring structure, an annular body is arranged at one end close to the limiting disc 8, a first annular groove 10 with a set angle is arranged on the inner end face of the annular body, the groove phase is not limited, and the groove angle range is theta₁The outer end face of the annular body is provided with a gasket mounting groove, and a gasket 4 and a limiting gasket 5 are sequentially mounted in the gasket mounting groove; the limiting block 7 is provided with a through hole which is far away from the annular body of the limiting disc 8 and can be inserted into the 90-degree countersunk head screw 6.

The limiting disc 8 is of a circular ring-shaped structure, two end faces of the limiting disc are provided with annular grooves with set angles, and the phases of the two grooves are not limited; an outer annular groove 13 close to the end face of the limiting block 7Angle range of theta₂The angle range of the inner annular groove 14 close to the end surface of the stopper cover 2 is theta₃(ii) a The annular grooves on the two end surfaces are semicircular at the end parts. After the limiting block 7 and the limiting disc 8 are combined together, an outer limiting pin shaft 3 which can move along the annular groove is arranged in the opposite groove; an inner limiting pin shaft 9 is fixedly arranged in the end surface of the limiting cover 2 facing the limiting disc 8, and the free end of the inner limiting pin shaft 9 is inserted into the inner annular groove 14 of the limiting disc 8 after the limiting cover 2 and the limiting disc 8 are combined together.

The end face contacting with the limiting disc 8 is provided with a limiting hole, and an inner limiting pin shaft 9 is arranged in the limiting hole and is aligned to the annular groove of the limiting disc 8. The spacing blocks 7, the spacing discs 8 and the hollow shaft, and the spacing cylinders 3 and the annular grooves are in clearance fit. Lubricating grease is slightly coated between the matching part and the gasket and the hollow shaft.

According to the method for limiting by using the mechanical rotation limiting device, in the initial position, the limiting block is aligned with one end of the limit position of the annular groove of the limiting disc, and the limiting cylinder is positioned at one end of the aligned limit position. The limiting block begins to rotate when the limiting block rotates by theta₁The limiting cylinder is contacted with a limiting cylinder at the limit position of the annular groove of the limiting disc, and slides along the annular groove on the end surface of the limiting block along the limiting disc along with the driving of the limiting cylinder when sliding through theta₂When the limiting column rotates by theta, the limiting disk is driven by the limiting column to start rotating₃And (4) limiting by a limiting cylinder arranged in a round hole of a limiting device cover, and finishing the rotation motion. Stopper pivoted angle equals the total of all guide way angle ranges on stopper and the spacing disc, promptly: the angle theta of the rotation of the limiting block is equal to theta₁+θ₂+θ₃。

Example 1:

the limiter cover 2, the limiting disc 8, the limiting block 7, the limiting gasket 5 and the 90-degree countersunk head screw 6 are made of 40CrNiMoA alloy steel materials. The outer limit pin shaft 3 and the inner limit pin shaft 9 are made of 4Cr13 stainless steel materials. The gasket 4 is made of 1Cr18Ni9Ti stainless steel material.

And the parts of the limiting cover 2, the outer limiting pin shaft 3, the inner limiting pin shaft 9, the limiting disc 8, the limiting block 7 and the limiting gasket 5 are subjected to quenching and tempering.

And (3) carrying out sulfur-nitrogen co-permeation treatment and cadmium plating treatment on the surface of the part of the stopper cover 2. And the surfaces of the limiting disc 8, the limiting block 7 and the limiting gasket 5 are subjected to sulfur-nitrogen co-permeation treatment and oxidation treatment.

And lubricating grease 7007 is coated between the limiting block 7, the limiting disc 8, the outer limiting pin shaft 3, the inner limiting pin shaft 9, the limiting cover 2 and the gasket 4.

The angle range of the first annular groove 10 of the limiting block 7 is 288 degrees, the angle ranges of the annular grooves on the two end faces of the limiting disc 8 are the same, and the inner annular groove 14 and the outer annular groove 13 are both 288 degrees.

Total rotation angle θ of the stopper 7 is θ₁+θ₂+θ_3＝288°+288°+288°＝864°。

Example 2:

the limiting device is provided with 3 limiting pin shafts and 2 limiting discs.

The limiting cover 2, the limiting disc, the limiting block 7, the limiting gasket 5 and the 90-degree countersunk head screw 6 are made of 40CrNiMoA alloy steel materials. The limiting pin shaft is made of 4Cr13 stainless steel material. The gasket 4 is made of 1Cr18Ni9Ti stainless steel material.

And the parts of the limiting cover 2, the limiting pin shaft, the limiting disc, the limiting block 7 and the limiting gasket 5 are subjected to quenching and tempering.

And (3) carrying out sulfur-nitrogen co-permeation treatment and cadmium plating treatment on the surface of the part of the stopper cover 2. The surfaces of the limiting disc, the limiting block 7 and the limiting gasket 5 are subjected to sulfur-nitrogen co-permeation treatment and oxidation treatment.

And lubricating grease 7007 is coated between the limiting block 7, the limiting disc, the limiting pin shaft, the limiting cover 2 and the gasket 4.

The first annular groove angle range of the limiting block 7 is 288 degrees, the annular groove angle ranges of the two end faces of the first limiting disc are identical and are 288 degrees, the annular groove angle range of one end face of the second limiting disc is 288 degrees, and the annular groove angle range of the other end face of the second limiting disc is 144 degrees.

The total rotation angle θ of the stop block 7 is 288 ° +288 ° +288 ° +288 ° +144 ° + 1296 °.

Example 3:

the limiting device is provided with 5 limiting pin shafts and 4 limiting discs.

The limiting cover 2, the limiting disc, the limiting block 7, the limiting gasket 5 and the 90-degree countersunk head screw 6 are made of 40CrNiMoA alloy steel materials. The limiting pin shaft is made of 4Cr13 stainless steel material. The gasket 4 is made of 1Cr18Ni9Ti stainless steel material.

And the parts of the limiting cover 2, the limiting pin shaft, the limiting disc, the limiting block 7 and the limiting gasket 5 are subjected to quenching and tempering.

And (3) carrying out sulfur-nitrogen co-permeation treatment and cadmium plating treatment on the surface of the part of the stopper cover 2. The surfaces of the limiting disc, the limiting block 7 and the limiting gasket 5 are subjected to sulfur-nitrogen co-permeation treatment and oxidation treatment.

And lubricating grease 7007 is coated among the limiting block 7, the limiting disc 8, the limiting cylinder 3, the limiting cover 2 and the gasket 4.

The annular groove angle range of the stop block 7 is 288 degrees; the angle ranges of the annular grooves on the two end faces of the first limiting disc are the same and are 288 degrees; the other 3 limiting discs have the same structure, the angle range of the annular groove of one end surface is 288 degrees, and the angle range of the annular groove of the other end surface is 144 degrees.

The total rotation angle θ of the stop block 7 is 288 ° +288 ° +288 ° +144 ° +288 ° +144 ° + 216 ° + 2160 °.