CN201944198U - Limit driving device of worm - Google Patents
Limit driving device of worm Download PDFInfo
- Publication number
- CN201944198U CN201944198U CN2010206302040U CN201020630204U CN201944198U CN 201944198 U CN201944198 U CN 201944198U CN 2010206302040 U CN2010206302040 U CN 2010206302040U CN 201020630204 U CN201020630204 U CN 201020630204U CN 201944198 U CN201944198 U CN 201944198U
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- CN
- China
- Prior art keywords
- worm
- housing
- worm screw
- limit
- external thread
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Gear Transmission (AREA)
Abstract
A limit driving device of a worm comprises a housing, the worm and a worm wheel meshed with the worm are arranged inside the housing, one end of the worm is an input end, and one end of the worm wheel is an output end. The other end of the worm is provided with an external thread section which is provided with a limit nut in a spinning mode, the limit nut is provided with a radial pin, the housing of the other end of the worm is provided with an axial oblong hole, the radial pin of the limit nut is arranged in the oblong hole, a limit ring is arranged at the connection portion of the worm and the external thread section and is arranged inside the housing of the other end of the worm, and the axis of the limit ring and the axis of the worm are at the same line. When the worm rotates in a positive direction, the limit nut is driven to slide forward along the oblong hole and abut one end of the housing to stop positive rotation of the worm. When the worm rotates in a negative direction, the limit nut is driven to slide backward along the oblong hole and abut the limit ring to stop negative rotation of the worm. The limit device is arranged at one side of the worm. When the worm wheel is driven by the worm to rotate, push power is not great though speed is high, and the housing can not be damaged.
Description
Technical field
The utility model relates to a kind of worm and gear drive unit, particularly a kind of limit stoper of worm and gear drive unit.
Background technique
The worm and gear drive unit is the device that transmission is rotated.The worm and gear drive unit has housing, the worm gear and the worm screw that are meshed are arranged in the housing, the end of worm screw is an input end, and an end of worm gear is an output terminal, and the rotating speed of worm screw is higher, the rotating speed of worm gear is lower, use in the worm and gear drive unit transmission rotating process at some, need be spacing, as revolve the valve actuator that turn 90 degrees keying, need 90 degree limit stoper, the worm gear output terminal can only be rotated in the scope of 90 degree.For the rotation that makes the drive unit output terminal is limited in certain angle, in the prior art, the limit stoper of worm and gear drive unit has the radial bars on worm-wheel shaft, the forward and backward block that matches with radial bars on the worm-wheel shaft is arranged on the housing inner peripheral wall of worm gear, and forward and backward block can only rotate a certain angle worm-wheel shaft.The limit stoper of this worm and gear drive unit is in worm gear one side, and when worm screw drove the worm gear rotation, speed diminished but torsion increases, and bigger torsion is easy to destroy housing.So limit stoper is spacing in use at the worm and gear drive unit of worm gear one side not to be very reliable.
Summary of the invention
The purpose of this utility model is in order to overcome above-mentioned deficiency, to propose the spacing drive unit of a kind of spacing reliable worm screw.
The utility model is realized with the following method.
The spacing drive unit of worm screw has housing, the worm gear and the worm screw that are meshed are arranged in the housing, the end of worm screw is an input end, one end of worm gear is an output terminal, and the other end of worm screw has external thread section, is rotary with stop nut on the external thread section, radial peg is arranged on the stop nut, axial strip hole is arranged on the housing of the worm screw the other end, and the radial peg of stop nut is in strip hole, in the housing of the worm screw the other end, worm screw and external thread section connecting place have the spacing annulus of axis on same straight line of axis and worm screw.
During use, the worm screw forward rotation, also drive when driving the worm gear forward rotation stop nut along strip hole to front slide, can not slide behind the end in stop nut is against housing, thereby stop worm screw to be rotated, the worm gear that output is rotated stops operating, and promptly the worm and gear drive unit is spacing by forward; The worm screw backward rotation, the driving counter-rotational while of worm gear also drives stop nut and slides backward along strip hole, can not slide behind the spacing annulus in stop nut is against housing, thereby stop worm screw to be rotated, the worm gear that output is rotated stops operating, and promptly the worm and gear drive unit is reversed spacing.
Limit stoper of the present utility model is in worm screw one side, when worm screw drives the worm gear rotation, though speed
Height but power is little can not destroy housing.
Below in conjunction with accompanying drawing, the utility model is further described.
Description of drawings
Fig. 1 cuts open schematic representation according to the three-dimensional office of the spacing drive unit of a kind of worm screw of invention scheme proposition of the present utility model.
Embodiment
Among Fig. 1, the spacing drive unit of worm screw has housing 1, the worm gear 2 and the worm screw 3 that are meshed are arranged in the housing, the end of worm screw is an input end 4, one end of worm gear is output terminal (not drawing among the figure), the other end of worm screw has external thread section 5, be rotary with stop nut 6 on the external thread section, radial peg 7 is arranged on the stop nut, axial strip hole 8 is arranged on the housing of the worm screw the other end, the radial peg of stop nut is in strip hole, in the housing of the worm screw the other end, worm screw and external thread section connecting place have the spacing annulus 9 of axis on same straight line of axis and worm screw.
Claims (1)
1. spacing drive unit of worm screw, housing is arranged, the worm gear and the worm screw that are meshed are arranged in the housing, the end of worm screw is an input end, one end of worm gear is an output terminal, it is characterized in that: the other end of worm screw has external thread section, be rotary with stop nut on the external thread section, radial peg is arranged on the stop nut, axial strip hole is arranged on the housing of the worm screw the other end, the radial peg of stop nut is in strip hole, in the housing of the worm screw the other end, worm screw and external thread section connecting place have the spacing annulus of axis on same straight line of axis and worm screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206302040U CN201944198U (en) | 2010-11-29 | 2010-11-29 | Limit driving device of worm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206302040U CN201944198U (en) | 2010-11-29 | 2010-11-29 | Limit driving device of worm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201944198U true CN201944198U (en) | 2011-08-24 |
Family
ID=44471541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206302040U Expired - Lifetime CN201944198U (en) | 2010-11-29 | 2010-11-29 | Limit driving device of worm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201944198U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615590A (en) * | 2013-12-04 | 2014-03-05 | 天津富赛克流体控制设备有限公司 | Worm wheel and worm driving device |
-
2010
- 2010-11-29 CN CN2010206302040U patent/CN201944198U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615590A (en) * | 2013-12-04 | 2014-03-05 | 天津富赛克流体控制设备有限公司 | Worm wheel and worm driving device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110824 |