CN202423037U - Cam-type contact positioning device for travel switch - Google Patents
Cam-type contact positioning device for travel switch Download PDFInfo
- Publication number
- CN202423037U CN202423037U CN201120533434XU CN201120533434U CN202423037U CN 202423037 U CN202423037 U CN 202423037U CN 201120533434X U CN201120533434X U CN 201120533434XU CN 201120533434 U CN201120533434 U CN 201120533434U CN 202423037 U CN202423037 U CN 202423037U
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- CN
- China
- Prior art keywords
- adjustment wheel
- wheel
- fast pulley
- rotating shaft
- cam
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- 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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Abstract
The utility model relates to a travel switch for a pneumatic executor, and particularly relates to a cam-type contact positioning device for the travel switch. The cam-type contact positioning device is characterized by comprising an upper fixed wheel (4) and a lower fixed wheel (14) which are fixed on a feedback rotating shaft (6), wherein an upper adjustment wheel (3) and a lower adjustment wheel (13) are sleeved on the feedback rotating shaft (6) between the upper fixed wheel (4) and the lower fixed wheel (14); the upper adjustment wheel (3) and the lower adjustment wheel (13) are in clearance fit with the feedback rotating shaft (6); the upper adjustment wheel (3) is meshed with the upper fixed wheel (4) through a gear; the lower adjustment wheel (13) is meshed with the lower fixed wheel (14) through another gear; and a compression spring (7) is arranged between the upper adjustment wheel (3) and the lower adjustment wheel (13). According to the cam-type contact positioning device, the problem about adjustment of the circumferential positions of a switch contact rod and a contact switch is solved; and the detection precision and the flexibility of the travel switch are improved.
Description
Technical field
The utility model relates to a kind of pneumatic actuator and uses travel switch, and especially travel switch is used the cam-type contact positioning device.
Background technology
As shown in Figure 1, traditional travel switch built-in contact-making switch trigger position when detecting the pneumatic actuator stroke is adjusted as follows: axle sleeve adopts interference fit to be pressed in the housing, and reaction lever connects as one and fixes with locking nut with the feedback rotating shaft; When reaction lever rotates, (can drive the reaction lever rotation when actuator moves up and down), it drives the feedback rotating shaft and the switch feeler lever is the center rotation with the axle sleeve, and split washer is used to prevent to feed back rotating shaft and moves axially in the axle sleeve upper edge.Split washer (totally 3) is used to prevent switch feeler lever moving axially along the feedback rotating shaft.Unclamp lock-screw, it is the circumferencial direction rotation at center that the switch feeler lever can wind with the feedback rotating shaft.The rotary switch feeler lever is behind the position that needs, and lock-screw is screwed into the switch feeler lever, and the switch feeler lever is fixed in the position of the circumferencial direction of feedback rotating shaft.
When the rotating shaft of reaction lever drive feedback with the axle sleeve is the center rotation,, feedback rotating shaft drive presses off contact-making switch thereby being fixed on the switch feeler lever rotation of feeding back in the rotating shaft.Two contact-making switches are installed in the travel switch, in the feedback rotating shaft, are fixed with two switch feeler levers.The switch feeler lever is fixed in the feedback rotating shaft by lock-screw, and adjustment position underaction causes the switch feeler lever easily and feeds back the loosening of rotating shaft behind the long-play.
The utility model content
The purpose of the utility model provides a kind of travel switch and uses the cam-type contact positioning device, can improve the reliability of travel switch and adjustment and the contacted particular location of contact-making switch as required.
A kind of travel switch is used the cam-type contact positioning device; Its special feature is; Comprise the last fast pulley and following fast pulley that are fixed in the feedback rotating shaft; Be set with the adjustment wheel in the feedback rotating shaft on this between fast pulley and the following fast pulley and adjust wheel down, wherein go up between adjustment wheel and following adjustment wheel and the feedback rotating shaft and be matched in clearance, and go up to adjust between wheel and the last fast pulley and pass through gears engaged; Also through gears engaged, between last adjustment wheel and following adjustment wheel, the compression spring is installed between following adjustment wheel and the following fast pulley.
Thereby wherein on last adjustment wheel and following adjustment wheel, all have a jut and trigger corresponding contact-making switch.
Wherein going up fast pulley all is fixed in the feedback rotating shaft through elastic cylindrical pin with following fast pulley.
The internal tooth of wherein going up on the adjustment wheel meshes together with the external tooth on the last fast pulley, and the internal tooth on the adjustment wheel and the external tooth on the following fast pulley mesh together down.
The utility model device is through adopting the quick contact positioning device of cam-type in travel switch inside; Solved the circumferential position adjustment problem of switch feeler lever and contact-making switch, the accuracy of detection that has improved travel switch has also improved the reliability that the adjustment wheel is connected with the feedback rotating shaft simultaneously with flexibility.
Description of drawings
Accompanying drawing 1 is the structural representation of background technology in the utility model;
Accompanying drawing 2 is the vertical view of background technology in the utility model;
Accompanying drawing 3 is the structural representation of the utility model;
Accompanying drawing 4 is the vertical view of the utility model;
Accompanying drawing 5 is the A-A cutaway view of Fig. 3.
Embodiment
Like Fig. 3,4, shown in 5; A kind of travel switch is used the cam-type contact positioning device; Comprise the last fast pulley 4 and following fast pulley 14 that are fixed in the feedback rotating shaft 6; Be set with adjustment wheel 3 in the feedback rotating shaft 6 on this between fast pulley 4 and the following fast pulley 14 and adjust wheel 13 down, wherein go up between adjustment wheel 3 and following adjustment wheel 13 and the feedback rotating shaft 6 and be matched in clearance, and go up to adjust between wheel 3 and the last fast pulley 4 and pass through gears engaged; Also through gears engaged, between last adjustment wheel 3 and following adjustment wheel 13, compression spring 7 is installed between following adjustment wheel 13 and the following fast pulley 14.Thereby wherein going up adjustment wheel 3 is the cam that has a jut with adjustment wheel 13 down and triggers corresponding contact-making switch.
Like Fig. 3,4, shown in 5, axle sleeve 8 adopts interference fit to be pressed on the housing 9, and reaction lever 12 connects as one with feedback rotating shaft 6 and be fixing with locking nut 11; Last fast pulley 4 is fixed in the feedback rotating shaft 6 through elastic cylindrical pin 5 with following fast pulley 14; Cam-like and have a jut can press off contact-making switch go up adjustment wheel 3 and down adjustment wheel 13 be installed in two and go up between fast pulley 4 and the following fast pulley 14, thereby at last adjustment wheel 3 with compression spring 7 is installed between the adjustment wheel 13 down on this both ends of the spring, adjust wheel 3 and following and adjust and take turns 13 and exert pressure; The internal tooth of two adjustment wheels the effect of compression spring 7 down and the external tooth of two fast pulleys mesh together; When reaction lever 12 rotations, (when moving up and down, actuator can drive reaction lever 12 rotations); Its drive feedback rotating shaft 6 and go up fast pulley 4, down fast pulley 14, go up adjustment wheel 3, adjustment wheel 13 and compression spring 7 be that the center rotates with axle sleeve 8 together down, split washer is used to prevent to feed back rotating shaft 6 and moves axially in axle sleeve 8 upper edges.
When last adjustment wheel 3 needs adjustment to go up the trigger position of contact-making switch 2; Last adjustment wheel 3 is applied a downward active force; Compression spring 7 is compressed, and to lower slider, throw off with the meshing gear of last fast pulley 4 by last adjustment wheel 3 along feedback rotating shaft 6 for last adjustment wheel 3; Adjustment wheel 3 can be done the position adjustment at the circumferencial direction that with feedback rotating shaft 6 is the center according to actual needs on this moment; The position confirms that the back removal is applied to the active force of adjustment wheel 3, and last adjustment wheel 3 feeds back rotating shaft 6 in the reseat pressure effect lower edge of spring and upwards slides, and last adjustment wheel 3 meshes with last fast pulley 4 again.
When adjustment wheel 13 needs the trigger position of contact-making switch 1 under the adjustment equally instantly; Apply an active force that makes progress to adjusting wheel 13 down; Compression spring 7 is compressed, and following adjustment wheel 13 upwards slides along feedback rotating shaft 6, and following adjustment wheel 13 is thrown off with the meshing gear of following fast pulley 14; This moment, adjustment wheel 13 can be done the position adjustment at the circumferencial direction that with feedback rotating shaft 6 is the center based on actual needs down; The position confirms that the back removal is applied to down the active force on the adjustment wheel 13, and following adjustment wheel 13 feeds back rotating shaft 6 to lower slider in the reseat pressure effect lower edge of spring, and following adjustment wheel 13 meshes with following fast pulley 14 again.
Because it is 0.2 interior external tooth engagement that modulus is adopted in the engagement between adjustment wheel and the fast pulley, thereby almost can ignore in adjustment wheel and the gap of fast pulley between circumferencial direction.This kind cam fast-positioning device can be applied in the stroke detection switch of instrument and meter industry pneumatic control valve; The switch feeler lever that has solved in the travel switch is adjusted problem with the circumferential position of contact-making switch; Improve the accuracy of detection and the flexibility of travel switch, also improved the reliability that the adjustment wheel is connected with rotating shaft simultaneously.
Claims (4)
1. a travel switch is used the cam-type contact positioning device; It is characterized in that: comprise the last fast pulley (4) and the following fast pulley (14) that are fixed in the feedback rotating shaft (6); Be set with adjustment wheel (3) in the feedback rotating shaft (6) between fast pulley on this (4) and the following fast pulley (14) and adjust wheel (13) down; Wherein go up adjustment wheel (3) and adjust down between wheel (13) and the feedback rotating shaft (6) and be matched in clearance; And through gears engaged, also through gears engaged, take turns (3) and compression spring (7) is installed between the adjustment wheel (13) down between following adjustment wheel (13) and the following fast pulley (14) between last adjustment wheel (3) and the last fast pulley (4) in last adjustment.
2. travel switch as claimed in claim 1 is used the cam-type contact positioning device, it is characterized in that: wherein last adjustment wheel (3) and adjustment down take turns (13) thus on all have a jut and trigger corresponding contact-making switch.
3. according to claim 1 or claim 2 travel switch is used the cam-type contact positioning device, it is characterized in that: wherein go up fast pulley (4) and following fast pulley (14) and all be fixed in the feedback rotating shaft (6) through elastic cylindrical pin (5).
4. according to claim 1 or claim 2 travel switch is used the cam-type contact positioning device; It is characterized in that: the internal tooth of wherein going up on the adjustment wheel (3) meshes together with the external tooth on the last fast pulley (4), and the internal tooth on the adjustment wheel (13) and the external tooth on the following fast pulley (14) mesh together down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120533434XU CN202423037U (en) | 2011-12-19 | 2011-12-19 | Cam-type contact positioning device for travel switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120533434XU CN202423037U (en) | 2011-12-19 | 2011-12-19 | Cam-type contact positioning device for travel switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202423037U true CN202423037U (en) | 2012-09-05 |
Family
ID=46747773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120533434XU Expired - Lifetime CN202423037U (en) | 2011-12-19 | 2011-12-19 | Cam-type contact positioning device for travel switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202423037U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522231A (en) * | 2011-12-19 | 2012-06-27 | 吴忠仪表有限责任公司 | Stroke switch |
| CN103174864A (en) * | 2013-03-19 | 2013-06-26 | 沈国庆 | Limiting mechanism used for electric actuator of valve |
| CN106783272A (en) * | 2016-12-31 | 2017-05-31 | 陕西烽火电子股份有限公司 | A kind of waterproof position limit switch of lifesaving positioning device with safety plug |
-
2011
- 2011-12-19 CN CN201120533434XU patent/CN202423037U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522231A (en) * | 2011-12-19 | 2012-06-27 | 吴忠仪表有限责任公司 | Stroke switch |
| CN103174864A (en) * | 2013-03-19 | 2013-06-26 | 沈国庆 | Limiting mechanism used for electric actuator of valve |
| CN106783272A (en) * | 2016-12-31 | 2017-05-31 | 陕西烽火电子股份有限公司 | A kind of waterproof position limit switch of lifesaving positioning device with safety plug |
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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 |
Granted publication date: 20120905 |
|
| CX01 | Expiry of patent term |