EP2246870A1 - Mechanical latch unit for a main drive unit - Google Patents
Mechanical latch unit for a main drive unit Download PDFInfo
- Publication number
- EP2246870A1 EP2246870A1 EP09005973A EP09005973A EP2246870A1 EP 2246870 A1 EP2246870 A1 EP 2246870A1 EP 09005973 A EP09005973 A EP 09005973A EP 09005973 A EP09005973 A EP 09005973A EP 2246870 A1 EP2246870 A1 EP 2246870A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- link
- joint
- housing
- main
- unit
- 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.)
- Granted
Links
- 230000007246 mechanism Effects 0.000 claims abstract description 25
- 230000007935 neutral effect Effects 0.000 claims description 10
- 239000002184 metal Substances 0.000 description 18
- 230000010354 integration Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000035484 reaction time Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/505—Latching devices between operating and release mechanism
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/505—Latching devices between operating and release mechanism
- H01H2071/506—Latching devices between operating and release mechanism using balls or rollers in the latching device
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/505—Latching devices between operating and release mechanism
- H01H2071/508—Latching devices between operating and release mechanism with serial latches, e.g. primary latch latched by secondary latch for requiring a smaller trip force
Definitions
- the invention relates to a mechanical latch unit for a main drive unit.
- a mechanical latch unit is used to lock/release a mechanical system especially a mechanism formed by links and joints in a defined position or operating stage.
- a typical application of latch units can be found in electromechanical main drive units for contact systems of electric circuit breakers.
- Technical areas are low voltage, medium voltage and high voltage. Requirements for these latch units especially in the mentioned application areas are:
- Figure 1 shows a side view of a latch unit (sectional view).
- the main components of the latch unit 1 are:
- a traction link 121 of a main drive unit 120 (especially an electromechanical drive unit for contact system of electrical circuit breaker) pushes towards the catch main roller 30, see pivot centre 122 of this traction link 121 and direction arrow F which shows the load F respectively the force of the traction link 121 of the main drive unit 120 carried out in direction to the main bearing 25.
- Fig. 1 shows the neutral position of the latch unit 1 whereby rotation of traction link 121 is blocked by the permanently coupled four bar latch mechanism (together with the catch main roller 30 and releasable locking unit).
- the latch unit 1 is prepared for the next operation sequence, for instance the following desired switching breaking process.
- Figure 2 shows a three-dimensional view of an opened latch unit 1. It is shown that the housing plate 10, the main lever 20 and both release links 40, 50 too consist of several sheet metal components, see for instance two sheet metal components 11, 12 of a housing plate 10.
- the two external interface bolts 110, 111 and the end stop bolt 70 are essential constructional components of the housing 9.
- Further main bearing 25 with axle 26, catch main roller 30 (movable lateral loosely coupled by slots 13), joints 35, 45 and bearing 55 are shown as well as integration block 90, actuator unit 100 with actuator coil 101, swivel anchor 102 and a part of the actuator trip lever 60.
- Figure 3 shows a three-dimensional view of the latch unit 1. Unlike Figure 2 this Figure 3 shows a closed housing 9 with both housing plates 10 (consisting of sheet metal components 11, 12). Further the external interface bolts 110, 111, the end stop bolt 70, the main lever 20 with the axle 26, and the catch main roller 30 are shown as well as a slot 13, the release links 40, 50, the integration block 90, the actuator unit 100 with the actuator coil 101 and the swivel anchor 102.
- Figure 4 shows in a side view the frontal area of the latch unit 1.
- the housing 9 with the housing plates 10, the external interface bolts 110, 111 and the end stop bolt 70 are shown as well as the main lever 20 with the axle 26 and the catch main roller 30, the release links 40, 50 with the joints 35, 45 and the bearing 55 just as the actuator unit 100 with the actuator coil 101, the swivel anchor 102 and the actuator trip lever 60.
- Figure 5 shows the relevant links and joints respectively the permanently coupled four bar latch mechanism of the latch unit 1 with
- the actuator trip lever 60 serves (together with the swivel anchor 102) as trip unit for the permanently coupled four bar latch mechanism, whereby the swivel anchor 102 is applied to the first end of the actuator trip lever 60, the pivot centre is designed as trip lever bearing 91 and the second end interacts as releasable locking unit with the first end of the release link 50.
- Figure 6 shows the relevant links and joints of the latch unit in the form of a line drawing. Again the relevant components of the permanently coupled four bar latch mechanism of the latch unit 1 are shown:
- the load respectively force F carried out to the catch main roller 30 by the traction link 121 of the main drive unit 120 with the pivot centre 122.
- the described design allows fulfilling tough performance requirements based on a permanently coupled four bar latch mechanism: 25 - 20 - 35 - 40 - 45 - 50 - 55.
- State of the art latch designs typically use a mixture of only temporary and permanently coupled subsystems which are hard to set and reset in a defined repeatable initial condition after one operation sequence.
- the permanent coupling of the described four bar latch mechanism instead allows not only for repeatable initial conditions but also for repeatable operation sequence. This is because the four bar latch mechanism constrains each part and its dynamics during the operation at any time.
- the performance versus cost ratio of the four bar design can be easily scaled so the joint units can either be realized with roller or less costly friction bearings. Therefore for applications where the performance requirements in reaction time can be reduced or higher peak load or overload conditions can be expected cheaper but more robust friction bearings can be used.
- standard pins and bolts can be used which integrate high precision and material quality at comparable low cost.
- sheet metal combinations can be used.
- the sheet metal components can be produced by stamping (fine blanking), laser cutting or other energy beam technology based manufacturing methods.
- the sheet metal design has several advantages:
- the sheet metal layers are combined by screwing, riveting, gluing, stamping, welding especially spot welding, friction stir welding, brazing, stamping or a combination of these methods.
- housing 9 and link components can be casted or machined (cutted).
- the housing design can be realized by use of sheet metal concept also.
- the housing 9 comprises two main parts (housing plates 10), a left and a right housing unit which are fixed and positioned by screws and support sleeves.
- the support sleeves are connected with screws to the interface of the main drive unit 120 - see the external interface bolts 110, 111.
- the housing 9 can be made out of one single part in case the number of parts needs to be further minimized.
- the four bar latch mechanism in the described latch design can be set in a highly repeatable initial condition by only one pin or bolt - see end stop bolt 70 - which limits the mobility of the mechanism in one direction so that the mechanism can rest in this position. This special position is defined the initial position.
- the four bar latch mechanism ideally will be placed close to singular position where three joints - 35, 45, 55 - are laying in one line because the holding force of the releasable locking unit F N required from the tripping actuator unit 100 will be a minimum.
- the mechanism will be placed close to the singularity and not in or beyond the singularity by adjusting the bolt position and to guarantee for the required performance.
- the pin can be designed as an eccentric pin which enables a tuning functionality and to compensate the effect of manufacturing tolerances. Summing up these features ensure ability for tuning and highly repeatable initial conditions.
- the mechanism is reset by spring force applied to one or more mechanism link components.
- one or more springs tension, compression, torsion or complex geometry springs
- one spring - see spring 80 - will act on the main lever 20 and another - see spring 61 - on the trip lever 60.
- the trip lever 60 will be driven by the trip actuator unit 100 for the release operation but reset by the spring 61 to catch the four bar latch mechanism in the initial position.
- the contact main roller 30 catches load and distributes it within main lever 20 which is made out of sheet metal layers.
- the main portion of the load is directly transferred into the housing 9 via the main lever 20 (also called catch link) and the main bearing 25.
- an additional load sleeve can be introduced between main lever 20 and main bearing 25.
- the main bearing 25 transfers the load via a standard precision parallel bolt forming the main axles into the housing 9. Throughout the whole linkage chain either roller bearings or friction sleeve bearings can be introduced.
- the integration block 90 which can also be made from sheet metal layers, integrates joint axles and interfaces of several parts in one single part saves parts and reduces tuning effort during assembly due to functional integration.
- sheet metal layers it can be also made from bended and formed sheet metal parts, machine cutted part or a casted part.
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Lock And Its Accessories (AREA)
- Transmission Devices (AREA)
Abstract
- with a first link (20) with a base end connected with the housing (9) via a first joint (25) and with a top end connected with the first end of a second link (40) via a second joint (35),
- with a third joint (45) to connect the second end of the second link (40) with the second end of a third link (50),
- whereby the first end of the third link (50) interconnects with a trip unit and a pivot centre of the third link (50) is connected with the housing (9) via a fourth joint (55),
- whereby the second joint (35), the third joint (45) and the fourth joint (55) approximately are lying in one line and
- whereby the load (F) of the traction link (121) of the main drive unit (120) is applied to the top end of the first link (20) next to the second joint (35) with defined deviation (d1) rectangular to this line in direction to the first joint (25).
Description
- The invention relates to a mechanical latch unit for a main drive unit.
- A mechanical latch unit is used to lock/release a mechanical system especially a mechanism formed by links and joints in a defined position or operating stage.
- A typical application of latch units can be found in electromechanical main drive units for contact systems of electric circuit breakers. Technical areas are low voltage, medium voltage and high voltage. Requirements for these latch units especially in the mentioned application areas are:
- high reliability,
- high robustness towards shock and overload conditions,
- large temperature ranges,
- high repeatability with lowest possible response time scatter,
- shortest and adjustable reaction time and total mechanical operation time.
- Typically these requirements and operating conditions imply a complex and high quality and therefore costly system design mainly based on electromechanical subsystems. If these latch units are designed to meet low cost targets usually there have to be compromises in quality and/or performance.
- Therefore it is an objective of this invention to provide a mechanical latch unit for a main drive unit with high reliability, high repeatability with lowest possible scatter in movement time and shortest/adjustable reaction time and total mechanical operation time.
- This problem is solved by a mechanical latch unit for a main drive unit with a permanently coupled four bar latch mechanism within a housing,
- with a first link with a base end connected with the housing via a first joint and with a top end connected with the first end of a second link via a second joint,
- with a third joint to connect the second end of the second link with the second end of a third link,
- whereby the first end of the third link interconnects with a trip unit and a pivot centre of the third link is connected with the housing via a fourth joint,
- whereby the second joint, the third joint and the fourth joint approximately are lying in one line and
- whereby the load of the traction link of the main drive unit is applied to the top end of the first link next to the second joint with defined deviation rectangular to this line in direction to the first joint.
- It is an advantage of the proposed mechanical latch unit for a main drive unit that the proposed design allows fulfilling tough performance requirements based on standard parts replacing the typically used special parts in the state of the art designs. The use of less parts and standard parts enables to improve the ratio cost to performance of latch designs. A reset in a defined repeatable initial condition after one operation sequence is guaranteed.
- Further advantageous embodiments of the invention are mentioned in the dependent claims.
- The invention will now be further explained by means of an exemplary embodiment and with reference to the accompanying drawings, in which:
- Figure 1
- shows a side view of a latch unit (sectional view),
- Figure 2
- shows a three-dimensional view of an opened latch unit,
- Figure 3
- shows a three-dimensional view of the latch unit,
- Figure 4
- shows in a side view the frontal area of the latch unit,
- Figure 5
- shows the relevant links and joints of the latch unit,
- Figure 6
- shows the relevant links and joints of the latch unit in the form of a line drawing.
-
Figure 1 shows a side view of a latch unit (sectional view). The main components of thelatch unit 1 are: - a
housing 9 with twohousing plates 10, - a main lever (= first link) 20 within this
housing 9, with base end and top end, - a main bearing 25 (= first joint) at the base end of the
main lever 20 fastened to thehousing 9, withaxle 26, - a catch (contact)
main roller 30 contacting the (free) top end of themain lever 20, whereby this catchmain roller 30 is able to move (loosely coupled) withinslots 13 implemented (for instance milled) in thehousing plates 10, - a release link 50 (= third link) with first end, pivot centre and second end, whereby the pivot centre is fastened to the
housing 9 via a bearing 55 (= fourth joint), - a release link 40 (= second link) with first end and second end, whereby the first end is fixed to the top end of the
main lever 20 via a joint 35 (= second joint) and the second end is fixed to the second end of therelease link 50 via a joint 45 (= third joint), - an
end stop bolt 70 fastened to thehousing 9, limiting the freedom of movement of therelease link 50 and being a stop for a neutral position, - two
external interface bolts housing 9 and linking units to fasten with the main drive unit, - an
actuator unit 100 with anactuator coil 101 and aswivel anchor 102, whereby anintegration block 90 acts as linking unit between theactuator unit 100 and thehousing 9, - a main
lever return spring 80 which pushes themain lever 20 in a neutral position at which therelease link 50 pushes towards theend stop bolt 70, - an actuator trip lever 60 with first end, pivot centre and second end, whereby the pivot centre is fastened to the
integration block 90 via a trip lever bearing 91, the first end contacts theswivel anchor 102, the second end contacts therelease link 50 and a triplever return spring 61 pushes theactuator trip lever 60 in a neutral position, in which alocking latch 62 at the second end of the actuator trip lever 60 locks alocking latch 51 at the first end of therelease link 50. - During locking state (= neutral position) a
traction link 121 of a main drive unit 120 (especially an electromechanical drive unit for contact system of electrical circuit breaker) pushes towards the catchmain roller 30, seepivot centre 122 of thistraction link 121 and direction arrow F which shows the load F respectively the force of thetraction link 121 of themain drive unit 120 carried out in direction to themain bearing 25.Fig. 1 shows the neutral position of thelatch unit 1 whereby rotation oftraction link 121 is blocked by the permanently coupled four bar latch mechanism (together with the catchmain roller 30 and releasable locking unit). To operate themain drive unit 120 the following steps occur: - 1) First a control signal is applied to
actuator unit 100 and accordinglyswivel anchor 102 moves in direction of arrow A, contacting/pushing first end of theactuator trip lever 60. - 2) Accordingly the
actuator trip lever 60 turns round about trip lever bearing 91 (pivot centre) and this deactivates the releasable locking unit respectively the interlock performed by lockinglatches 51, 62 - see movement of second end ofactuator trip lever 60, expressed by arrow B. - 3) The
release link 50 turns round about bearing 55 (pivot centre) - see movement of the first end of therelease link 50 expressed by arrow C and movement of thejoint 45 with the second ends of therelease links main lever 20 round about main bearing 25 - see rotary movement expressed by arrow D1. - 4) Accordingly catch
main roller 30 moves sideways - see movement expressed by arrow D2 - and thisreleases traction link 121 which turns round aboutpivot centre 122 of the main drive unit 120 - see rotary movement expressed by arrow G. Thus the desired operation sequence (switching breaking process) will be performed. - After cessation of control signal to
actuator unit 100 the triplever return spring 61 pushes actuator trip lever 60 back to the neutral position - see movement of the first end of theactuator trip lever 60 expressed by arrow I. After release oftraction link 121 the mainlever return spring 80 pushes themain lever 20 back to the neutral position - see movement expressed by arrow H. - After a 360°-rotation the
traction link 121 returns to the catch main roller 30 (for instance with the help of an electrical motor of the main drive) and will be blocked. Accordingly thelatch unit 1 is prepared for the next operation sequence, for instance the following desired switching breaking process. -
Figure 2 shows a three-dimensional view of an openedlatch unit 1. It is shown that thehousing plate 10, themain lever 20 and bothrelease links sheet metal components housing plate 10. The two external interface bolts 110, 111 and theend stop bolt 70 are essential constructional components of thehousing 9. Furthermain bearing 25 withaxle 26, catch main roller 30 (movable lateral loosely coupled by slots 13),joints bearing 55 are shown as well asintegration block 90,actuator unit 100 withactuator coil 101,swivel anchor 102 and a part of theactuator trip lever 60. -
Figure 3 shows a three-dimensional view of thelatch unit 1. UnlikeFigure 2 thisFigure 3 shows a closedhousing 9 with both housing plates 10 (consisting ofsheet metal components 11, 12). Further theexternal interface bolts end stop bolt 70, themain lever 20 with theaxle 26, and the catchmain roller 30 are shown as well as aslot 13, the release links 40, 50, theintegration block 90, theactuator unit 100 with theactuator coil 101 and theswivel anchor 102. -
Figure 4 shows in a side view the frontal area of thelatch unit 1. Thehousing 9 with thehousing plates 10, theexternal interface bolts end stop bolt 70 are shown as well as themain lever 20 with theaxle 26 and the catchmain roller 30, the release links 40, 50 with thejoints bearing 55 just as theactuator unit 100 with theactuator coil 101, theswivel anchor 102 and theactuator trip lever 60. -
Figure 5 shows the relevant links and joints respectively the permanently coupled four bar latch mechanism of thelatch unit 1 with - the
main lever 20 respectively the first link with themain bearing 25 respectively the first joint at its base end just as the second joint 35 and the catchmain roller 30 at its top end, - the
release link 40 respectively the second link with its first end connected with the second joint 35 and its second end connected with the third joint 45, - the
release link 50 respectively the third link with its free first end interacting as releasable locking unit with theactuator trip lever 60, with its second end connected with the third joint 45 and with its pivot centre designed as bearing 55 respectively fourth joint. - The
actuator trip lever 60 serves (together with the swivel anchor 102) as trip unit for the permanently coupled four bar latch mechanism, whereby theswivel anchor 102 is applied to the first end of theactuator trip lever 60, the pivot centre is designed as trip lever bearing 91 and the second end interacts as releasable locking unit with the first end of therelease link 50. -
Figure 6 shows the relevant links and joints of the latch unit in the form of a line drawing. Again the relevant components of the permanently coupled four bar latch mechanism of thelatch unit 1 are shown: - first link =
main lever 20 - second link =
release link 40 - third link =
release link 50 - first joint =
main bearing 25 - second joint = joint 35
- third joint = joint 45
- fourth joint =
bearing 55 - Further you can see the load respectively force F carried out to the catch
main roller 30 by thetraction link 121 of themain drive unit 120 with thepivot centre 122. On the basis of the x/y-coordinate system it is shown that the load respectively force F does not exactly press in direction to the first joint respectivelymain bearing 25 but there has to be a defined (small) deviation x = d1 in order to cause the rotary movement D1 and all other movements D2, E, C and ultimately rotary movement G after interlock deactivation. - The described design allows fulfilling tough performance requirements based on a permanently coupled four bar latch mechanism: 25 - 20 - 35 - 40 - 45 - 50 - 55. State of the art latch designs typically use a mixture of only temporary and permanently coupled subsystems which are hard to set and reset in a defined repeatable initial condition after one operation sequence. The permanent coupling of the described four bar latch mechanism instead allows not only for repeatable initial conditions but also for repeatable operation sequence. This is because the four bar latch mechanism constrains each part and its dynamics during the operation at any time.
- The performance versus cost ratio of the four bar design can be easily scaled so the joint units can either be realized with roller or less costly friction bearings. Therefore for applications where the performance requirements in reaction time can be reduced or higher peak load or overload conditions can be expected cheaper but more robust friction bearings can be used. For joint axles standard pins and bolts can be used which integrate high precision and material quality at comparable low cost.
- For the links of the mechanism and the main housing components sheet metal combinations can be used. The sheet metal components can be produced by stamping (fine blanking), laser cutting or other energy beam technology based manufacturing methods. The sheet metal design has several advantages:
- Easy incremental scaling of the design by adding more or reducing sheet metal layers in order to adapt to different application specific loads.
- Functional integration since the sheet metal production process enables to integrate complex geometry elements. So secondary functional elements can be directly integrated into these sheet metal parts so that the total number of parts in the design can be reduced.
- By use of the right manufacturing process for the sheet metal parts no additional finishing processes like grinding are necessary.
- The sheet metal layers are combined by screwing, riveting, gluing, stamping, welding especially spot welding, friction stir welding, brazing, stamping or a combination of these methods.
- As an
alternative housing 9 and link components can be casted or machined (cutted). The housing design can be realized by use of sheet metal concept also. In the preferred embodiment thehousing 9 comprises two main parts (housing plates 10), a left and a right housing unit which are fixed and positioned by screws and support sleeves. The support sleeves are connected with screws to the interface of the main drive unit 120 - see theexternal interface bolts housing 9 can be made out of one single part in case the number of parts needs to be further minimized. - The four bar latch mechanism in the described latch design can be set in a highly repeatable initial condition by only one pin or bolt - see end stop bolt 70 - which limits the mobility of the mechanism in one direction so that the mechanism can rest in this position. This special position is defined the initial position. The four bar latch mechanism ideally will be placed close to singular position where three joints - 35, 45, 55 - are laying in one line because the holding force of the releasable locking unit FN required from the tripping
actuator unit 100 will be a minimum. For the real design the mechanism will be placed close to the singularity and not in or beyond the singularity by adjusting the bolt position and to guarantee for the required performance. In case the mechanism is placed beyond or too close to the singularity the tripping force or the sensitivity won't be optimal resulting in a too high reaction time and/or less robustness. In order to adjust the pin position and therefore the initial position of the latch mechanism the pin (end stop bolt 70) can be designed as an eccentric pin which enables a tuning functionality and to compensate the effect of manufacturing tolerances. Summing up these features ensure ability for tuning and highly repeatable initial conditions. - With respect to the initial position of the latch mechanism two different initial positions have to be distinguished during the functional sequence:
- At the beginning of the resetting movement the mechanism will be moved as far as release link 50 lies close to end stop bolt 70 (which is caused by main lever return spring 80). The locking latches 62 and 51 do not come into contact. The width of the gap between these locking latches 62, 51 can be adjusted by setting-up of an eccentric designed
end stop bolt 70. - As soon as load F is applied to
main lever 20 the locking latches 62 and 51 come into contact whereasrelease link 50 does not contactend stop bolt 70 any more. This initial position is important for the power transmission and the function of the mechanism. - The mechanism is reset by spring force applied to one or more mechanism link components. For this one or more springs (tension, compression, torsion or complex geometry springs) can be used. In the preferred embodiment one spring - see spring 80 - will act on the
main lever 20 and another - see spring 61 - on thetrip lever 60. Thetrip lever 60 will be driven by thetrip actuator unit 100 for the release operation but reset by thespring 61 to catch the four bar latch mechanism in the initial position. - The contact
main roller 30 catches load and distributes it withinmain lever 20 which is made out of sheet metal layers. The main portion of the load is directly transferred into thehousing 9 via the main lever 20 (also called catch link) and themain bearing 25. In order to improve the load distribution an additional load sleeve can be introduced betweenmain lever 20 andmain bearing 25. Themain bearing 25 transfers the load via a standard precision parallel bolt forming the main axles into thehousing 9. Throughout the whole linkage chain either roller bearings or friction sleeve bearings can be introduced. - The
integration block 90 which can also be made from sheet metal layers, integrates joint axles and interfaces of several parts in one single part saves parts and reduces tuning effort during assembly due to functional integration. Alternatively to sheet metal layers it can be also made from bended and formed sheet metal parts, machine cutted part or a casted part. - List of reference signs
- 1
- latch unit
- 9
- housing
- 10
- housing plates
- 11
- sheet metal component
- 12
- sheet metal component
- 13
- slots in housing plates
- 20
- main lever (catch link) = first link with base end and top end
- 25
- main bearing = first joint
- 26
- axle
- 30
- catch (contact) main roller
- 35
- second joint
- 40
- release link = second link with first end and second end
- 45
- third joint
- 50
- release link = third link with first end, pivot centre and second end
- 51
- locking latch
- 55
- bearing = fourth joint
- 60
- actuator trip lever with first end, pivot centre and second end
- 61
- trip lever return spring
- 62
- locking latch
- 70
- end stop bolt
- 80
- main lever return spring
- 90
- integration block
- 91
- trip lever bearing
- 100
- actuator unit
- 101
- actuator coil
- 102
- swivel anchor
- 110
- external interface bolt
- 111
- external interface bolt
- 120
- main drive unit (electromechanical drive unit for contact system of electrical circuit breaker)
- 121
- traction link
- 122
- pivot centre
- A
- movement of the
swivel anchor 102 - B
- movement of the second end of the
actuator trip lever 60 - C
- movement of the first end of the
release link 50 - D1
- rotary movement of the
main lever 20 - D2
- movement of the catch
main roller 30 - E
- movement of the joint 45 with the second ends of the
links - F
- load, force of the
traction link 121 - FN
- holding force of the releasable locking unit
- G
- rotary movement of the
traction link 121 - H
- movement of the
main lever 20 - I
- movement of the first end of the
actuator trip lever 60
Claims (7)
- Mechanical latch unit (1) for a main drive unit (120) with a permanently coupled four bar latch mechanism within a housing (9),- with a first link (20) with a base end connected with the housing (9) via a first joint (25) and with a top end connected with the first end of a second link (40) via a second joint (35),- with a third joint (45) to connect the second end of the second link (40) with the second end of a third link (50),- whereby the first end of the third link (50) interconnects with a trip unit and a pivot centre of the third link (50) is connected with the housing (9) via a fourth joint (55),- whereby the second joint (35), the third joint (45) and the fourth joint (55) approximately are lying in one line and- whereby the load (F) of the traction link (121) of the main drive unit (120) is applied to the top end of the first link (20) next to the second joint (35) with defined deviation (d1) rectangular to this line in direction to the first joint (25).
- Mechanical latch unit according to claim 1, characterized in that a catch main roller (30) is inserted between the traction link (121) of the main drive unit (120) and the top end of the first link (20).
- Mechanical latch unit according to claim 2, characterized in that the catch main roller (30) is guided/loosely coupled by slots (13) implemented in the housing plates (10).
- Mechanical latch unit according to any of the proceeding claims, characterized in that an end stop bolt (70) limits the freedom of movement of the third link (50) and being a stop for a neutral position.
- Mechanical latch unit according to any of the proceeding claims, characterized in that a locking latch (62) at the second end of an actuator trip lever (60) locks a locking latch (51) at the first end of the third link (50).
- Mechanical latch unit according to claim 5, characterized in that a trip lever return spring (61) pushes the actuator trip lever (60) in a neutral position.
- Mechanical latch unit according to any of the proceeding claims, characterized in that a main lever return spring (80) pushes the first link (20) in a neutral position.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09005973A EP2246870B1 (en) | 2009-04-30 | 2009-04-30 | Mechanical latch unit for a main drive unit |
AT09005973T ATE526675T1 (en) | 2009-04-30 | 2009-04-30 | MECHANICAL LOCKING UNIT FOR A MAIN DRIVE UNIT |
KR1020117025702A KR20120012461A (en) | 2009-04-30 | 2010-04-03 | Mechanical latch unit for a main drive unit |
CN201080019978.2A CN102422375B (en) | 2009-04-30 | 2010-04-03 | Mechanical latch unit for a main drive unit |
PCT/EP2010/002142 WO2010124782A1 (en) | 2009-04-30 | 2010-04-03 | Mechanical latch unit for a main drive unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09005973A EP2246870B1 (en) | 2009-04-30 | 2009-04-30 | Mechanical latch unit for a main drive unit |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2246870A1 true EP2246870A1 (en) | 2010-11-03 |
EP2246870B1 EP2246870B1 (en) | 2011-09-28 |
Family
ID=41058538
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09005973A Active EP2246870B1 (en) | 2009-04-30 | 2009-04-30 | Mechanical latch unit for a main drive unit |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2246870B1 (en) |
KR (1) | KR20120012461A (en) |
CN (1) | CN102422375B (en) |
AT (1) | ATE526675T1 (en) |
WO (1) | WO2010124782A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2472550B1 (en) * | 2010-12-29 | 2013-07-17 | ABB Technology AG | A latching apparatus and an operating mechanism with such a latching apparatus |
BR112018071809B1 (en) * | 2016-04-26 | 2022-08-02 | Lts Lohmann Therapie-Systeme Ag | DEVICE AND METHOD FOR DISPENSING STRIPS CARRYING ACTIVE INGREDIENT OR CONTAINING ACTIVE INGREDIENT |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4344054A (en) * | 1981-03-04 | 1982-08-10 | General Electric Company | Latch assembly for static trip circuit breakers |
US20080271982A1 (en) * | 2007-05-04 | 2008-11-06 | Gibson Perry R | Electrical switching apparatus having a cradle with combined pivot and over-toggle reversing pin |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7019229B1 (en) * | 2004-09-03 | 2006-03-28 | Eaton Corporation | Door interlock assembly and draw-out circuit breaker assembly employing the same |
US7459650B2 (en) * | 2007-04-19 | 2008-12-02 | Eaton Corporation | Electrical switching apparatus, and latch assembly and latch engagement control mechanism therefor |
CN201210469Y (en) * | 2008-06-05 | 2009-03-18 | 浙江正泰电器股份有限公司 | Assistant tripping mechanism for circuit breaker |
-
2009
- 2009-04-30 AT AT09005973T patent/ATE526675T1/en not_active IP Right Cessation
- 2009-04-30 EP EP09005973A patent/EP2246870B1/en active Active
-
2010
- 2010-04-03 CN CN201080019978.2A patent/CN102422375B/en active Active
- 2010-04-03 WO PCT/EP2010/002142 patent/WO2010124782A1/en active Application Filing
- 2010-04-03 KR KR1020117025702A patent/KR20120012461A/en active IP Right Grant
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4344054A (en) * | 1981-03-04 | 1982-08-10 | General Electric Company | Latch assembly for static trip circuit breakers |
US20080271982A1 (en) * | 2007-05-04 | 2008-11-06 | Gibson Perry R | Electrical switching apparatus having a cradle with combined pivot and over-toggle reversing pin |
Also Published As
Publication number | Publication date |
---|---|
WO2010124782A1 (en) | 2010-11-04 |
WO2010124782A8 (en) | 2011-01-13 |
KR20120012461A (en) | 2012-02-10 |
ATE526675T1 (en) | 2011-10-15 |
CN102422375A (en) | 2012-04-18 |
CN102422375B (en) | 2014-09-10 |
EP2246870B1 (en) | 2011-09-28 |
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