CN201038037Y

CN201038037Y - Safety switch

Info

Publication number: CN201038037Y
Application number: CNU2007201411143U
Authority: CN
Inventors: 埃里克·贝希勒
Original assignee: Euchner GmbH and Co KG
Current assignee: Euchner GmbH and Co KG
Priority date: 2007-03-23
Filing date: 2007-03-23
Publication date: 2008-03-19
Anticipated expiration: 2017-03-23

Abstract

The utility model discloses a safety switch, comprising a switch shell. The switch shell is provided with a key channel in which at least one key can be inserted from outside. A convex roulette enters the key channel and rotates when the key inserts. A convex roulette fixing mechanism is provided when the key is completely inserted in or moved out.

Description

Safety switch

Technical field

The utility model relates to a kind of safety switch with switch case, and described switch case has at least one the key passage that is used to hold from the key of switch case outside, and has rotation and be installed in cam disc on the switch case.When key inserted the key passage, this key made the cam disc rotation.

Background technology

For example disclosed safety switch is used for according to whether being positioned at correct being provided with integrally formed some protective device of machine carrying out to electric power supply in DE44 08 024A1.In some cases, safety switch can not connect the control circuit to the machine power supply, and this is because protective device has the bigger tolerance that allows than safety switch.

Disclose a kind of safety switch that rotation is installed in the cam disc on the axle that has among the EP-A1-0707 329, interlock is arranged on the described axle.This interlock locks when key does not insert or stationary cam dish and being released from its latched position when key inserts.Described cam disc is thrown off along with the further insertion of key, and interlock rotates with cam disc.

Summary of the invention

The purpose of this utility model provides a kind of improved safety switch, prevents that wherein cam disc from rotating because of the machine vibration that produces when key inserts or leaves the key passage.

Basically realize above-mentioned purpose by a kind of like this safety switch, this safety switch comprises switch case, the first key passage in switch case, can be contained in the key in the key passage from the external position of switch case and stretches in the key passage when key inserts and the cam disc that can rotate around rotating shaft in switch case.Fixture in the switch case when key inserts the key passage fully and key when shifting out the key passage fully the stationary cam dish it can not be rotated.After passing through fixture stationary cam dish, it is darker that key can be inserted in the key passage.

By stationary cam dish when key inserts fully, can prevent that cam disc from rotating because of the machine vibration that produces in the key insertion process, thereby key can be pulled out no longer.The rotation of cam disc move stop after key insert certain depth.Because it is darker that fixture allows cam disc that key is inserted, in other words can more realize " track is aimed at and arranged " on the length, therefore even not accurate switch motion protective device also can reliably be controlled.In favourable execution mode, even cam disc also is fixed when key does not insert.

In a kind of preferred implementation, can be formed for the device of stationary cam dish by cam disc with at least one recess, described recess is in cooperating with respect to the locking component that cam disc moves.

Recess can be arranged on for example on the additional tangible parts of cam disc one side structure.Locking component can be arranged in a side of cam disc and be configured and be configured as has removable blocking element.By this execution mode, can adopt existing parts in safety switch.Reduced the quantity of required new parts like this and reduced required transformation instrument.When can moving perpendicular to the rotating shaft of cam disc, blocking element obtained a kind of execution mode of especially saving the space.

Can also for example obtain recess and locking component by this way, promptly recess is arranged on a zone of cam disc, and this zone is stretched into along with the rotation of cam disc in the key passage.Latch-up structure can be set to the part of key simultaneously.Resulting especially simple locking component has the fork-shaped key of vertical fluting, and by forming in the inner recessed notch portion that is provided with of keyway.Recess then is configured to flute profile, and cam disc keeps its anti-fracture and the performance that fractures thus.Recess can also pass the whole thickness of cam disc, and the tangible parts that always pass key can be set thus, replaces recessed notch portion.

The operational capacity of safety switch additionally obtains best the raising, because fixture is configured to the both sides of symmetrical stationary cam dish.

When described switch has two nonparallel key passages that insert key as required, when they preferably extended mutual vertically, the feasibility of safety switch of the present utility model was used and has been obtained widening.Executive component can outwards not stretch in the key passage when key inserts, and is preferable over blocking element and links to each other and the position to be set and tripping cam dish when key inserts so that cam disc is fixed on this.When described executive component can move and can stretch into simultaneously in two key passages along the angular bisector of dividing two key passages equally, reduced the quantity of required building block in simple mode.When being configured to blocking element simultaneously, advantageously reduced executive component the quantity of building block once more.

From openly being well understood to other purposes of the present utility model, advantage and feature the utility model detailed description of the preferred embodiment below in conjunction with accompanying drawing.

Description of drawings

Accompanying drawing with reference to formation the utility model part:

Figure 1A-1C is the side sectional view according to the part of the safety switch of the utility model first execution mode, and wherein key inserts different degree; And

Fig. 2 A-2C is the side sectional view according to the part of the safety switch of the utility model second execution mode, and wherein key inserts different degree; And

Fig. 3 is the vertical view of key shown in Fig. 2 A-2C.

Embodiment

In first execution mode of the utility model safety switch, the switch case 1 of the operating mechanism shown in the figure has the first key passage 3 that longitudinal extension passes switch case.Additional or the second key passage 5 is arranged on the switch case 1 of operating mechanism and perpendicular to the first key passage 3 and extends.Key 7 can be as requested in two

key passages

3 or 5 any one inserted in the outside.Cam disc 9 rotations are installed in the switch case 1 of operating mechanism.Cam disc rotating shaft 11 extends perpendicular to the first key passage 3 and the second key passage 5.Cam disc 9 stretches in

key passage

3 and 5.

Under the situation of two

key passages

3 and 5 intersecting areas, cam disc 9 has the short groove 13 that extends radially outward in every side when being positioned at key and not inserting wherein.Key 7 is configured to have the fork-shaped end to insert in key passage 3 or 5.The outside of each is provided with local transverse arm 7 ' in key 7 two ends.When key 7 inserts in two

key passages

3 or 5 one when interior, local transverse arm 7 ' is bonded in the groove 13, and drives cam disc 9 thus and the direction that therewith continues to insert along key 7 is moved.Cause the rotation of cam disc 9 to be moved like this.

The drift (not shown) be slidably engaged on switch case vertically on.At the other end of this drift, same unshowned switch is arranged on the switch case 1.When the insertion by key 7 impelled cam disc 9 rotation mobile, cam disc promoted drift and active operation switch thus.

On in cam disc 9 both sides each, in the zone of rotating shaft 11, oval tangible parts 15 are formed on the cam disc.In the tangible parts 15 of two same configuration each has flute profile first recess 17, and it departs from the relative and sagittal planes of the same slotted recess of 90 ° two 19 to arranging about rotating shaft 11 and the groove 13 and first recess 17.Additional recess 19 is positioned at two tips of oval tangible parts 15, and first recess 17 is arranged on a vertical side.

Except the tangible parts 15 of cam disc, each side at cam disc 9 is provided with blocking element 21 again, and it is extending axially.Each blocking element 21 has the elliptical openings 23 around rotating shaft 11.By on switch case but not shown guide, determine the single feasible moving direction of blocking element 21.This direction is perpendicular to rotating shaft 11, simultaneously on the direction of elliptical openings 23.This moving direction is aimed at the joining of two

key passages

3 and 5, and extends along the bisector of two passage angles.

In other words, this moving direction is from 45 ° of two key channel offset.The end 21 ' of blocking element 21 is aligned on this joining.At the other end further from this joining, blocking element 21 is by the not shown spring-loaded that is installed on the switch case.In the side near cam disc 9, blocking element 21 has outstanding locking teeth or ratchet 25.Ratchet 25 can be bonded on cam disc 9 tangible parts 15 first recess 17 and also have in other recesses 19.The degree of engagement feasible for other recesses 19 is littler than first recess 17.The end 21 ' that is aligned on the joining of

key passage

3 and 5 is stretched in the first key passage 3 and the second key passage 5.It is the inclined-plane that is used for key 7 that blocking element 21 is configured to as this end 21 ' of executive component simultaneously.

When key 7 was positioned at

key passage

3 and 5 outside, cam disc 9 was aligned the joining that makes groove 13 be in key passage 3 and 5.Because load the spring force of blocking element 21, blocking element 21 closes rotating shaft 11 in elliptical openings 23 further from a termination of passage joining.Simultaneously, locking teeth 25 is bonded in the recess 17 of tangible parts 15.

When key 7 inserts in two

key passages

3 or 5 one when interior, the key initial impact at blocking element 21 as the end 21 ' that is used for the inclined-plane of key.This bump forces the fast element 21 of connection to overcome spring force and returns, and in other words leaves key passage 3 and 5.Simultaneously, locking teeth 25 is thrown off from first recess 17.Along with the further insertion of key 7, its local transverse arm 71 is translating cam dish 9 also, each transverse arm and groove 13 rotational engagement.Simultaneously, tangible parts 15 continue to move, and its periphery engages locking teeth 25.Since the eccentricity of tangible parts 15, the distance that blocking element 21 shifts out from

key passage

3 or 5 even bigger than 7 distances that blocking element is moved of key.

When key 7 inserts fully, in other words before local transverse arm 7 ' shifts out from groove 13 once more soon, locking teeth 25 falls in of other recesses 19.Cam disc 9 is fixed on this position thus.Even in the process that vibration is moved, also be enough to locking teeth 25 is fixed in other recesses 19 to the spring bias voltage that blocking element 21 applies.Safety switch of the present utility model can be constructed such that from cam disc and be in a fixed position that key 7 can be aimed at arrangement according to track and further insert in

key passage

3 or 5, and local transverse arm 7 ' leaves groove 13 subsequently once more.

Along with shifting out of key 7, become very big by tangible parts 15 through the power that cam disc 9 is applied on the locking teeth 25, make locking teeth 25 from other recesses 19, be forced out.It is mobile that This move rotates freely dish 9.

In second execution mode of the utility model safety switch, switch case 101 has key path 10 5 equally.Vertically the fork-shaped key 107 of fluting can insert in the key path 10 5.The cam disc 109 that stretches in the key path 10 5 rotates along with the insertion of key 107 by this way, and promptly the local transverse arm 107 ' of key 107 is bonded in the groove 113 that is arranged at cam disc 109 both sides.Tangible parts 115 around the rotating shaft 111 of cam disc 109 form and with cam disc 109 one.Parts 115 are configured to have flank 117.

Be directly adjacent to each tangible parts 115 blocking element 121 is set.As shown in Fig. 2 A, blocking element 121 has the elliptical openings 123 around rotating shaft 111 as only.Blocking element 121 can move perpendicular to key path 10 5, and can pass through unshowned spring-loaded.When key 107 was positioned at key path 10 5 outside, the locking teeth 125 that is arranged on blocking element 121 inside was bonded on the flank part 117 of tangible parts 115.

Edge or periphery around cam disc 109 are provided with slotted recess 119 in both sides.Recess 119 is perpendicular to radially extending and at an end opening of cam disc 109 peripheries.Along with the rotation of cam disc 109, described edge or outer regions can arrive in the key path 10 5.

When key 107 inserted in the key path 10 5, the tip of key overcame the bias voltage extruding of its spring or forces blocking element 121 to return, and locking teeth 125 is thrown off with flank 117 subsequently thus.The local transverse arm 107 ' of key 107 moves it by driving cam disc 109, and observing from direction of insertion until local transverse arm 107 ' is the back that is positioned at cam disc 109.Cam disc 109 moves the punch device shown in Fig. 2 A, and described punch device is console switch again.Be arranged in the structure at cam disc 109 rear portions at local transverse arm 107 ', slotted recess 119 is arranged along key path 10 5, shown in Fig. 2 C.Key 107 can be aimed at the mode of arranging by track subsequently and further insert in the key path 10 5, and the recessed notch portion 127 that is arranged on key 107 inside thus is bonded in the slotted recess 119 with stationary cam dish 109.

Although selected numerous embodiments explanation the utility model it will be recognized by those skilled in the art under the prerequisite of the scope of the present utility model that does not break away from the accessory claim qualification and can make multiple variation and modification to the utility model.

Claims

1. a safety switch is characterized in that, comprising:

Switch case;

The first key passage in described switch case;

Can be contained in the key in the described key passage from the external position of described switch case;

When described key inserts, stretch in the described key passage and the cam disc that can in described switch case, rotate around rotating shaft; And

Fixture in described switch case, it is used for, and fixing described cam disc can not rotate it when described key inserts described key passage fully, and it is darker to be used for after the fixing described cam disc by described fixture described key being inserted in the described key passage.

2. safety switch as claimed in claim 1 is characterized in that,

Described fixture is fixing described cam disc in described key does not insert described switch case the time.

3. safety switch as claimed in claim 1 is characterized in that,

Described fixture comprises at least one recess and cooperates locking component movably with respect to described cam disc.

4. safety switch as claimed in claim 3 is characterized in that,

Described locking component can move diametrically with respect to described rotating shaft, and is biased on the described cam disc by spring.

5. safety switch as claimed in claim 4 is characterized in that,

Described at least one recess is arranged on the side of the tangible parts of formation at described cam disc; And

Blocking element is arranged in a side of described cam disc and comprises described locking component.

6. safety switch as claimed in claim 5 is characterized in that,

Described blocking element comprises the elliptical openings around the described rotating shaft of described cam disc.

7. safety switch as claimed in claim 6 is characterized in that,

Described blocking element is movably perpendicular to the rotating shaft of described cam disc.

8. safety switch as claimed in claim 3 is characterized in that,

9. safety switch as claimed in claim 8 is characterized in that,

10. safety switch as claimed in claim 9 is characterized in that,

11. safety switch as claimed in claim 3 is characterized in that,

Described at least one recess is arranged on described cam disc and stretches in described cam disc rotary course on the zone in the described key passage; And

Described locking component is provided with on the described key.

12. safety switch as claimed in claim 11 is characterized in that,

Described at least one recess is configured to groove; And

Described key is the fork-shaped with cannelure, and described locking component is by recessed notch portion forms in the inside of described cannelure.

13. safety switch as claimed in claim 1 is characterized in that,

Described fixture is symmetricly set on the both sides of described cam disc.

14. safety switch as claimed in claim 1 is characterized in that,

The second key passage is non-parallel in described switch case to be extended in the described first key passage; And

Executive component is movably along the angular bisector of the described first and second key passages, and stretches in described first and second passages when interior when described key does not insert in the described key passage one.

15. safety switch as claimed in claim 14 is characterized in that,

Described executive component is the part of blocking element.