FR2524670A1 - REMOTE MECHANICAL CONTROL FOR EXPLOSION-PROOF ELECTRIC MOTORS - Google Patents

Abstract

1. Mechanical remote control for anti-deflagrating motors of the type in which a motor (2) comprises a resilient returning on-off control crankshaft (1) connected by a movement transmission means (31) to a mobile means (21) to which can be manually imparted a reciprocating motion by acting on an handling button (22), characterized in that said mobile means has the shape of a slide (21) having a groove (30) and a thinned portion (21a) with a shoulder (29), said slide (21) being placed between a first (10) and a second (11) pivoting plates mounted on two rods which are parallel to each other and perpendicular to the sliding direction of the slide (21), said pivoting plates (10, 11), normally urged for tending to make them to pivot the one towards the other, able to be activated by an olive (23) mounted so that it can move in a longitudinal direction which is parallel to the direction of movement of the slide (21) and also placed between said two pivoting plates (10, 11), the first pivoting plate (10) being further able to be submitted through a bearing (17) to action of a cam (18) driven by a timer (3) ; the position of said olive (23) with respect to said pivoting plates (10, 11) permitting or not the activation of the slide (21) by means of an handling button (22) and as a consequence the on or off setting of the motor (2).

Description

The present invention relates to a remote control

  This can be used in particular for explosion-proof electric motors. In certain applications, for example for the control of paint stirrers or other suitable products

  holding volatile components, we use

  deflagrants which are often placed in places with little ac-

  It is therefore important to be able to order these

electric motors & distance.

  In addition, in the use under consideration, a mixer or another device must be driven for a well-defined period of time, so that the control must be provided with a timer to avoid having to constantly monitor it. It is very important also that the engine can be stopped immediately if it occurs

  an incident and it is known in the art that an inter-

  Particularly fast attention is obtained when

  installation of a stop switch or button operating by

  depressed since an actuation says in a punch

responds to an automatic reflex.

  The present invention solves the problem set out in the foregoing by creating a new control which, in

  also prevents restarting of the engine even by

  accidental operation In addition, stopping the engine may

  maintain at all times while the minu-

  In addition, these results are obtained by putting

  using extremely simple and robust means.

  In accordance with the invention, the mechanical control

  remote control for explosion-proof electric motors

  as an elastic return crank is characterized in that said crank is connected to a slide having a groove and a thinned part which are disposed between two pivoting plates actuated respectively by a

  olive and a timer control, the position of the oli-

  ve with respect to the pivoting plates allowing or not the ac-

  sliding of the slide by an operating button.

  Various other features of the invention

  moreover emerge from the detailed description which follows.

  An embodiment of the object of the invention

  tion is shown, by way of nonlimiting example, at

attached drawing.

  Fig 1 is a partly diagrammatic elevation

  than a remote control mechanism for an electric motor

  explosion-proof stick or the like.

  Fig 2 is an elevation seen substantially following

before line II-II of fig 1.

Fig 3 is

III of fig 1.

Fig 4 is

IV of fig 1.

Fig 5 is

line V-V in fig 4.

Fig 6 is

VI of fig 1.

Fig 7 is fig 1 illustrating the

ristic.

Fig 8 is

VIII of fig 7.

Fig 9 is

IX of fig 7.

a section seen along line III-

a section seen along line IV-

a partial section seen according to

a section seen along line VI-

  a partial elevation control similar to

a character position

  a section seen along line VIII-

a section seen along line IX-

  Fig 10 is a sectional view along the line X-X

in fig 7.

  Fig 11 is a partial elevation similar to

  Fig 7 illustrating another characteristic position.

  Fig 12 is a section along line XII-

XII of fig 11.

  Fig 13 is a sectional view along the line

XIII-XIII of fig 11.

  Fig 14 is a sectional view along line XIV-

XIV of fig 11.

  The command illustrated in the drawing is intended for

  operate an actuating crank l of an electric motor

  explosion-proof stick 2 Crank 1 is normally ground-

  licit by a spring to turn in the direction of the arrow-

  che f 1, i.e. in the automatic interrupting direction-

the motor supply 2.

  The operating time of the motor 2 must be controlled by a timer 3, the operation of which must not be taken into account until after the crank 1 has been made to pivot in the opposite direction to the arrow.

  fl of a sufficient angle Furthermore, the anti-slip motor

  flagrant 1 must be able to be stopped instantly by means

  a push button 4 of the so-called punch type.

  As illustrated in the drawing, the control advantageously comprises a bolt bowl 5 in which is fixed a support 6 made of sheet metal This support forms a back or dropped edge 7 which is

  parallel to the front face 5a of the housing.

  Figs 1 and 2 show that the back 7 has

  lights 8 through which legs 9 have passed

  arched end 9 a which are formed by two plates 10 and 11 The legs 9 are held behind the back 7 by two springs 12, 13 formed by piano strings,

  the ends are engaged behind the cam ends

  brées 9 has said legs, said springs also taking

  their support in their middle part against projections 14, 15 formed from punctures in the back 7 The springs 12, 13 are prestressed so as to exert a thrust on the legs 9 and, therefore, so as to make

  pivot the plates 10, 11 in the direction for which these plates

  that are close to each other.

  The plate 10 has a falling edge 16 extending

  over a part of its length which is directed towards the plate

  11 In addition, the plate 10 has a bearing surface 17 which is intended to cooperate with a cam 18 driven

by timer 3.

  The 1 l plate, for its part, has two tom-

  bés 19 respectively 20 offset from each other The fallen edge 19 is intended to cooperate with a slide

  21 can be operated by a button 22.

  The fallen edge 20 is intended to cooperate with an olive 23 having a flat 24, said olive possibly being

controlled by pushbutton 4.

  As shown in fig 5, the olive 23 is mounted on a rod 25 which connects it to the pusher 4 and which forms two grooves 26, 26a for locking balls 27 held by an elastic ring 28 Thus, the olive 23 can be immobilized in two positions, namely:) a position appearing in fig 5, 11 and 13 for

  which the fallen edge 20 of the plate 11 is directly supported

  Tely on the rod 25 of small diameter while the dropped edge 16 of the plate 10 is supported on the flat 24 of the olive 23 In this position, the pusher 4 is pressed

  and it is not possible to start the electric motor

  trique 2 Indeed, as the drawing illustrates, the coulis-

  bucket 21 which can be controlled by the button 22 has a first part 21 a of small diameter which is connected to the part 21 proper by a shoulder 29, said

  part 21 having, moreover, a groove 30 The shoulder

  Lement 29 abuts against the fallen edge 19 if one

  seeks to pull the button 22, which prevents the sliding

  bucket 21 moves a cable 31 used to actuate the crank 1 Similarly, the dropped edge 16 being raised, the same is true of the bearing surface 17 and, consequently, the latter cannot be actuated by the cam 18 of timer 3; 2) a position appearing in particular in FIGS. 1, 4 and 9 for which the pusher 4 is pulled and has resulted

  the rod 25 which is then locked by the balls 27 in

  trant in the grooves 26 a (fig 5) In this second position, the flat 24 of the olive 23 raises the fallen edge 20 and it follows that the spring 12 causes the edge to be applied

  fallen 16 from the plate 10 on the body 21 of the slide.

  In this position which is the same as that occupied

  the plate 10 in the case described under 1) above, the door

  tee 17 cannot be actuated by cam 18 of

the timer 3.

  When you want to run engine 2, it

  it is necessary to bring the pusher 4 into the second posi-

  tion described above, pull the button 22 for a-

  lead in the position shown in figs 7 and 10, so that the spring 12 rotates the plate 10, so that the fallen edge 16 enters the groove 30 of the slide 21 which is thus locked The traction exerted on the bou-

  ton 22 brought crank 1 into working position.

  When the time counted by the timer 3 has elapsed, the upper part of the cam 18 raises the span 17, which is shown in FIG. 3; so that the plate 10 is itself raised so that the fallen edge 16 escapes from the groove 30 by releasing the slide 21 which is brought back to the position illustrated in FIG 1 by the elastic force exerted on the crank 1 in the direction of the arrow f 1 En

as a result, the engine stops.

  The engine can be restarted by

  exerting a new traction on the button 22 and in

sliding the timer again.

  Assuming now that motor 2 is in

  during operation, i.e. the plate 10 main-

  holds, by its fallen edge 16, the slide 21 in the posi-

  tion illustrated in fig 10 and that an incident occurs which requires the engine to be stopped immediately, it suffices to

  suddenly push pusher 4 to bring it into the po-

  sition illustrated in fig 11 and 13, that is to say that the fallen edge 16 of the plate 10 is raised and bears on the flat 24 of the olive 23 while the fallen edge 20 of the plate 11 comes support on the rod 25 In this case, the

  dropped edge 16 releases the groove 30 from the slide 21 to allow

  crank 1 to return to the non-operating position

  the motor and the slide 21 can no longer be actuated from the button 22 since the fallen edge 19 of the

  plate 11 is then in front of the shoulder 29 A re-

  start-up is only possible after a new switch

pusher 4.

  The invention is not limited to the exemplary embodiment.

  sation shown and described in detail, because various modifications

  can be made without departing from its scope

  particular, cable 31 could be replaced by a

hydraulic control.

Claims (7)

  1 mechanical remote control for explosion-proof electric motors comprising an elastic return crank (1), characterized in that said crank (1) is connected to a slide (21) having a groove (30) and a thinned part (21 a) which are arranged between two pivoting plates (10, 11) actuated respectively by an olive (23) and a cam (18) of a timer (3), the position of the olive (23) relative to the pivoting plates (10 , 11) allowing or not actuation of the slide (21) by a operating button (22).   2 Mechanical control according to claim 1, characterized in that the olive (23) is mounted on a rod (25) which can be locked in two distinct positions depending on the position occupied by a pusher (4), one of the positions authorizing the engine to run so that   the olive (23) keeps raised a first of the pivotal plates   aunts (10) which otherwise prevents the sliding of the slide (21) by a fallen edge (16) which it has and which is disposed   in front of a shoulder (29) of said slide.   3 Mechanical control according to one of the claims   1 and 2, characterized in that the crank operates   ment of the motor is held in the running position by the slide locked by the fallen edge (19) of a second of the pivoting plates (11) introduced into a groove (30) of said slide and held in this position when said slide is pulled that said plate is not   raised by the cam driven by the timer.   4 Mechanical control according to one of the claims   1 to 3, characterized in that the actuation of the olive actuator pushes the said olive into a second position for which the fallen edge holding the slide in the actuation position of the motor is raised while the second plate initially kept raised by the olive   is lowered so that the operating handle of the mo-   tor returns it to the non-operating position and that a new actuation of the slide is made impossible   by the fallen edge of the plate released by the olive.   Mechanical control according to one of the claims   cations 1 to 4, characterized in that the two pivotal plates   aunts have hinge legs (9) engaged in openings (8) on the back (7) of a support (6), said legs having folded ends (9a) delimiting notches for the ends of springs (12 , 13) taking   support on projections (14, 15) of the back and exerting on the-   say legs of thrusts tending to rotate the plates towards each other.   6 Mechanical control according to one of the claims   1 to 5, characterized in that the slide is connected to the motor operating crank by a cable (31),   hydraulic transmission or the like.   7 Mechanical control according to one of the claims   tions 1 to 6, characterized in that the plates are arranged inside a case (5) on the front face of which are mounted the pusher, the slide actuation button and the timer.   8 Mechanical control according to one of the claims   tions 1 to 7, characterized in that the plate actuating olive depending on the position of the pusher has a flat (24) at its middle part and locking grooves (26, 26 a) cooperating with an elastic lock ensuring the   maintaining said olive in two stable positions.