CN112202293B - Stroke control device of linear electric mechanism - Google Patents
Stroke control device of linear electric mechanism Download PDFInfo
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- CN112202293B CN112202293B CN202011004940.XA CN202011004940A CN112202293B CN 112202293 B CN112202293 B CN 112202293B CN 202011004940 A CN202011004940 A CN 202011004940A CN 112202293 B CN112202293 B CN 112202293B
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- worm
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- electric mechanism
- worm wheel
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- 230000007246 mechanism Effects 0.000 title claims abstract description 54
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 10
- 230000033001 locomotion Effects 0.000 claims description 18
- 238000010586 diagram Methods 0.000 description 5
- 230000000670 limiting effect Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 125000006850 spacer group Chemical group 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
- H02K7/1163—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion
- H02K7/1166—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion comprising worm and worm-wheel
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Abstract
The invention provides a stroke control device of a linear electric mechanism, which comprises: the device comprises a shell assembly (1), a helical gear (2), a spring piece (3), a switch (4), a worm (7), a shaft assembly (8) and a worm wheel shaft (13); the shaft assembly (8) rotates along with the output end of the speed reducer to drive the two worm wheel shafts (13) to rotate in opposite directions; the worm wheel shaft (13) is in threaded connection with the helical gear (2); the outer side of the helical gear (2) is meshed with a worm (7) fixed on the shell component (1), and the helical gear and the worm (7) are linearly moved in opposite directions along the axial direction of a worm gear shaft (13) connected with each other, and when the linear electric mechanism moves to the extension/retraction limit, the output end of a speed reducer of the linear electric mechanism drives one helical gear (2) to move and press the spring piece (3) so as to trigger the switch (4) to be switched off. The stroke control requirement of the long-size linear electric mechanism is met, the control precision and the reliability of the product are improved, the debugging is simple, and the service life is long.
Description
Technical Field
The invention belongs to the technical field of electric mechanism strokes, and relates to a stroke control device of a linear electric mechanism.
Background
The linear electric mechanism is widely applied in the aviation field, is an important device of some actuating mechanisms of airplanes, and accurately controlling the stroke of the linear electric mechanism is an important index of the linear electric mechanism. The linear electric mechanism is mainly used for opening and closing airplane hatch doors and canopy covers, and whether the linear electric mechanism has a reliability function depends on the safety of the working performance of the whole actuating mechanism, so that the use safety of the airplane is influenced.
At present, a linear electric mechanism stroke control device basically adopts a gear reduction mechanism, a screw-nut pair and a boss to press a switch assembly, so as to control the stroke of an electric mechanism, the mode has large volume, difficult adjustment and poor accuracy, the reliability is poor due to factors such as vibration, impact and the like in the using process, the safety of an airplane is influenced, overshoot is easily caused or the overvoltage of the switch is damaged due to the increase of the inertia sliding of a product under the using condition, and the structure cannot meet the linear electric mechanism moving at high speed; or the gear transmission of the linear electric mechanism is adopted to convert the linear motion into the rotary motion, the switch component is pressed in the circumferential direction through the cam, and the switch component is mounted on the shell component to be matched for use.
Disclosure of Invention
The purpose of the invention is: the invention provides a stroke control device of a linear electric mechanism, which is not limited by the motion speed of the linear electric mechanism, meets the stroke control requirement of the long-sized linear electric mechanism, improves the control precision and reliability of a product, and meets the requirements of simple debugging and long service life.
The technical scheme of the invention is as follows: the invention provides a stroke control device of a linear electric mechanism, which comprises: the device comprises a shell assembly 1, a helical gear 2, a spring piece 3, a switch 4, a worm 7, a shaft assembly 8 and a worm wheel shaft 13; wherein,
one end of the shaft assembly 8 is connected with the output end of a speed reducer of the linear electric mechanism, and the output end of the speed reducer drives the shaft assembly 8 to rotate;
the other end of the shaft assembly 8 is in worm wheel connection with two worm wheel shafts 13 to drive the two worm wheel shafts 13 to rotate in opposite directions;
one end of each worm wheel shaft 13 is arranged on the shell component 1, the outer side of the other end of each worm wheel shaft 13 is sleeved with the helical gear 2, and the worm wheel shafts 13 are in threaded connection with the helical gears 2;
the outer side of the bevel gear 2 is meshed with a worm 7 fixed on the shell component 1;
the two helical gears 2 rotate along with the shaft assembly 8 and do linear motion in opposite directions along the axial direction of the worm gear shafts 13 connected with the helical gears respectively;
a spring piece 3 and a switch 4 are arranged in the linear motion direction of each helical gear 2, and the switch 4 is connected in series in a control circuit of the linear electric mechanism in a normally closed manner;
when the linear electric mechanism moves to the extension/retraction limit, the output end of the speed reducer of the linear electric mechanism drives a bevel gear 2 to move and press a spring leaf 3 so as to trigger a switch 4 to be switched off.
Optionally, the shaft assembly 8 comprises: shaft 8a1, cylindrical pin 8a2, and worm screw 8a 3;
the worm 8a3 is sleeved on the shaft 8a1 and is connected with the two worm wheel shafts 13 through worm wheels;
a cylindrical pin 8a2 penetrates through the worm 8a3 and the shaft 8a 1;
the shaft 8a1 is connected to the output of the reducer of the linear electric motor.
Optionally, the stroke control device further includes: cover plate 9, screw 10, bush 11 and bearing 12;
the cover plate 9 is fixed on the inner side of the shell component 1 through a screw 10, two bushings 11 are arranged on the cover plate 9, and a bearing 12 is arranged in each bushing 11;
one end of the worm wheel shaft 13 is sleeved in the bearing 12.
Optionally, a spacer washer is provided between the bearing 12 and the bushing 11 to adjust the engagement of the worm gear shaft 13 with the shaft assembly 8.
Optionally, the stroke control device further includes: screws 5 and cover plates 6;
the worm 7 penetrates through the shell assembly 1, a clamping groove is formed in the head, located outside the shell assembly 1, of the worm 7, and the clamping groove is used for adjusting the extending/retracting limit position of the linear electric mechanism by adjusting the meshing position of the helical gear 2 on the worm 7;
the cover plate 6 covers the head of the worm 7 and is fixed outside the housing assembly 1 by means of screws 5.
Optionally, a limiting protrusion is arranged on the inner side of the cover plate 6, and the limiting protrusion is clamped in a clamping groove at the head of the worm 7.
Optionally, the fixing part of the spring plate 3 is fixed at the bottom of the switch 4 through a screw and fixed on the shell assembly 1;
the pressing part of the spring piece 3 is connected with the fixing part and is arranged between the helical gear 2 and the button of the switch 4.
Alternatively, the two worm gear shafts 13 on both sides of the worm 8a3 are arranged offset.
According to the stroke control device of the linear electric mechanism, the helical gears 2 and the worm gear shaft 13 are respectively arranged on two sides of the shaft assembly 8 to control the extending and retracting working states of the linear electric mechanism, and state signals of the limit position are provided. An adjusting washer is arranged between the bush 11 and the worm wheel shaft 13, so that the worm wheel and the worm are well meshed, and the transmission precision and the debugging convenience are improved; after the helical gear is decelerated, the linear movement speed is low, and the phenomenon that the switch is impacted by overvoltage of the terminal switch due to inconsistent pressing terminal switch force and stroke caused by increased inertia slippage in the using process of a product, the switch is damaged, and the motion control is invalid is avoided; the worm gear and worm speed reduction has a self-locking function, and the condition of product failure caused by vibration or increase of axial clearance of the screw rod is avoided; when the electric mechanism does not work, the worm 7 is rotated to conveniently and simply adjust the stroke of the electric mechanism, so that the stroke of the electric mechanism is controlled and adjusted; under the condition of unchanged volume, the stroke control device changes relevant technical parameters of a worm wheel, a worm, a helical gear and the like, can meet the stroke control requirements of linear motion electric mechanisms with different strokes, reduces the weight of products, and can meet the control requirements of long-stroke linear electric mechanisms. .
Drawings
FIG. 1 is a first schematic structural diagram of a linear electric mechanism stroke control device provided by the invention;
FIG. 2 is a second schematic structural diagram of the stroke control device of the linear electric mechanism according to the present invention;
FIG. 3 is a schematic structural diagram of a helical gear provided by the present invention;
FIG. 4 is a schematic view of the spring plate according to the present invention;
FIG. 5 is a schematic structural view of a cover plate structure provided by the present invention;
FIG. 6 is a schematic structural view of the worm provided by the present invention;
FIG. 7 is a schematic structural view of a shaft assembly provided by the present invention;
FIG. 8 is a schematic view of the construction of a bushing provided by the present invention;
FIG. 9 is a schematic view of the worm gear shaft of the present invention;
description of reference numerals:
1-a housing assembly; 2-a helical gear; 3, spring lamination;
4, switching; 5-screws; 6, covering a plate;
7-a worm; 8-shaft assembly; 9-a cover plate;
10-a screw; 11-a bushing; 12-a bearing;
13-worm gear shaft; 8a1 — axis; 8a2 — cylindrical pin;
8a3 — Worm.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 is a first structural schematic diagram of a linear electric mechanism stroke control device provided by the present invention, fig. 2 is a second structural schematic diagram of the linear electric mechanism stroke control device provided by the present invention, and as shown in fig. 1 and 2, the linear electric mechanism stroke control device provided by the present invention includes: the device comprises a shell assembly 1, a bevel gear 2, a spring piece 3, a switch 4, a screw 5, a cover plate 6, a worm 7, a shaft assembly 8, a cover plate 9, a screw 10, a bushing 11, a bearing 12 and a worm wheel shaft 13.
The shaft assembly 8 consists of a shaft 8a1, a cylindrical pin 8a2, a worm screw 8a 3; the worm 8a3 is sleeved on the shaft 8a1, and the cylindrical pin 8a2 is used for fixing the worm 8a3 and the shaft 8a 1;
two sides of the worm 8a3 are respectively provided with a group of worm gear shafts 13, one end of each worm gear shaft 13 is provided with a bearing 12, and the other end is provided with a helical gear 2;
one end of the worm wheel shaft 13 is provided with a bearing 12 and is arranged in the shell assembly 1 together with the bush 11, and an adjusting washer is arranged between the bearing 12 and the bush 11, so that the good meshing of the worm wheel shaft 13 and the worm 8a3 in the shaft assembly 8 can be adjusted;
the shaft assembly 8 outputs torque obtained by transmitting the rotation motion of the motor through a speed reducing device of the linear electric mechanism, and simultaneously drives a worm wheel shaft 13 arranged on the shell assembly 1 to rotate.
The worm 7 is arranged in the shell component 1, a cross groove is machined at the head of the worm 7, and a corresponding convex block is arranged on the cover plate 6 and used for limiting the swing of the worm 7.
One end of the worm gear shaft 13 is provided with a bearing 12 and is arranged in the shell component 1 together with the bush 11, an adjusting washer is arranged between the bearing 12 and the bush 11, the worm gear shaft 13 can be adjusted to be well meshed with the worm 8a3 in the shaft component 8, the other end of the worm gear shaft is provided with threads, when the worm gear shaft 13 rotates, the helical gear 2 is driven to rotate, but the rotational motion of the helical gear 2 is converted into linear motion due to the limiting effect of the worm 7.
The movement of the bevel gear 2 finally presses the spring piece 3 and the switch 4, so that the electric mechanism is powered off and stops working.
The invention has the advantages that: a group of bevel gears 2 and a worm gear shaft 13 are respectively arranged on two sides of the shaft assembly 8 to control the extension and retraction working states of the linear motion electric mechanism, so that a state signal of a limit position is provided.
An adjusting washer is arranged between the bush 11 and the worm wheel shaft 13, so that the worm wheel and the worm are well meshed, and the transmission precision and the debugging convenience are improved; after the helical gear is decelerated, the linear movement speed is low, and the phenomenon that the switch is impacted by overvoltage of the terminal switch due to inconsistent pressing terminal switch force and stroke caused by increased inertia slippage in the using process of a product, the switch is damaged, and the motion control is invalid is avoided; the worm gear and worm speed reduction has a self-locking function, and the condition of product failure caused by vibration or increase of axial clearance of the screw rod is avoided; when the electric mechanism does not work, the worm 7 is rotated to conveniently and simply adjust the stroke of the electric mechanism, so that the stroke of the electric mechanism is controlled and adjusted;
under the condition of unchanged volume, the stroke control device changes relevant technical parameters of a worm wheel, a worm, a helical gear and the like, can meet the stroke control requirements of linear motion electric mechanisms with different strokes, reduces the weight of products, and can meet the control requirements of long-stroke linear electric mechanisms.
Finally, it should be noted that the above examples are only illustrative of the implementation of the present invention and are not limiting. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical proposal described in the embodiments can be modified, or some technical features can be equally replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the present invention, and are intended to be included within the scope of the appended claims.
Claims (7)
1. A linear motor travel control apparatus comprising: the device comprises a shell assembly (1), a helical gear (2), a spring piece (3), a switch (4), a worm (7), a shaft assembly (8) and a worm wheel shaft (13); wherein,
one end of the shaft assembly (8) is connected with the output end of a speed reducer of the linear electric mechanism, and the output end of the speed reducer drives the shaft assembly (8) to rotate;
the other end of the shaft assembly (8) is connected with two worm wheel shafts (13) through worm wheels to drive the two worm wheel shafts (13) to rotate in opposite directions;
one end of each worm wheel shaft (13) is arranged on the shell component (1), the outer side of the other end of each worm wheel shaft is sleeved with a helical gear (2), and the worm wheel shafts (13) are in threaded connection with the helical gears (2);
the outer side of the bevel gear (2) is meshed with a worm (7) fixed on the shell component (1);
the two bevel gears (2) do linear motion in opposite directions along the axial directions of worm gear shafts (13) which are respectively connected with the two bevel gears along with the rotation of the shaft assembly (8);
a spring piece (3) and a switch (4) are arranged in the linear motion direction of each helical gear (2), and the switch (4) is normally closed and connected in series in a control circuit of the linear electric mechanism;
when the linear electric mechanism moves to the limit of extension or retraction, the output end of the speed reducer of the linear electric mechanism drives a bevel gear (2) to move to press a spring piece (3) so as to trigger a switch (4) to be switched off;
further comprising: a cover plate (9), a screw (10), a bushing (11) and a bearing (12);
the cover plate (9) is fixed on the inner side of the shell component (1) through a screw (10), two bushings (11) are arranged on the cover plate (9), and a bearing (12) is arranged in each bushing (11);
one end of the worm wheel shaft (13) is sleeved in the bearing (12).
2. The device according to claim 1, characterized in that the shaft assembly (8) comprises: a shaft (8 a 1), a cylindrical pin (8 a 2), and a worm screw (8 a 3);
the worm (8 a 3) is sleeved on the shaft (8 a 1) and is connected with the two worm wheel shafts (13) through worm wheels;
the cylindrical pin (8 a 2) penetrates through the worm screw (8 a 3) and the shaft (8 a 1);
the shaft (8 a 1) is connected to the output of the reducer of the linear electric motor.
3. Device according to claim 1, characterized in that between the bearing (12) and the bushing (11) is arranged an adjusting washer for adjusting the engagement of the worm wheel shaft (13) with the shaft assembly (8).
4. The apparatus of claim 1, further comprising: a screw (5) and a cover plate (6);
the worm (7) penetrates through the shell assembly (1), a clamping groove is formed in the head, located outside the shell assembly (1), of the worm (7), and the clamping groove is used for adjusting the extending or retracting limit position of the linear electric mechanism by adjusting the meshing position of the bevel gear (2) on the worm (7);
the cover plate (6) covers the head of the worm (7) and is fixed on the outer side of the shell component (1) through the screw (5).
5. The device according to claim 4, characterized in that the cover plate (6) is provided on its inner side with a stop lug, which is snapped into a snap groove in the head of the worm (7).
6. The device according to claim 1, characterized in that the fixed part of the spring plate (3) is fixed on the bottom of the switch (4) and on the shell component (1) through screws;
the pressing part of the spring piece (3) is connected with the fixing part and arranged between the helical gear (2) and the button of the switch (4).
7. Device according to claim 2, characterized in that the two worm-gear shafts (13) on both sides of the worm (8 a 3) are offset.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011004940.XA CN112202293B (en) | 2020-09-22 | 2020-09-22 | Stroke control device of linear electric mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011004940.XA CN112202293B (en) | 2020-09-22 | 2020-09-22 | Stroke control device of linear electric mechanism |
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| Publication Number | Publication Date |
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| CN112202293A CN112202293A (en) | 2021-01-08 |
| CN112202293B true CN112202293B (en) | 2022-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011004940.XA Active CN112202293B (en) | 2020-09-22 | 2020-09-22 | Stroke control device of linear electric mechanism |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594605A (en) * | 2020-06-17 | 2020-08-28 | 深圳市利新祥电机有限公司 | Worm gear speed reducing motor with balanced forward and reverse rotation output torque |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202023794U (en) * | 2011-03-24 | 2011-11-02 | 大连万讯电力仪表有限公司 | Mechanical transmission device capable of realizing manual operation or electric operation for straight-travel air cylinder |
| JP6204024B2 (en) * | 2013-02-13 | 2017-09-27 | 株式会社ミツバ | Electric motor device |
| CN203151305U (en) * | 2013-03-12 | 2013-08-21 | 互赢集团控股有限公司 | Motor pushrod apparatus with adjustable stroke |
| JP2015230095A (en) * | 2014-06-05 | 2015-12-21 | 熊谷 潤美 | Worm reduction machine with back-lash removal mechanism and industrial mechanism having worm reduction machine as driving source |
| CN208221516U (en) * | 2018-05-23 | 2018-12-11 | 黑龙江工程学院 | A kind of camera shooting sliding rail |
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- 2020-09-22 CN CN202011004940.XA patent/CN112202293B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594605A (en) * | 2020-06-17 | 2020-08-28 | 深圳市利新祥电机有限公司 | Worm gear speed reducing motor with balanced forward and reverse rotation output torque |
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| CN112202293A (en) | 2021-01-08 |
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