Patent Publication Number: US-10770217-B2

Title: Mounting kit for a throttle, and throttle

Description:
FIELD OF THE INVENTION 
     The invention relates to a mounting kit for a throttle with a toroidal core, wherein an insulating element which passes through the opening in the toroidal core is provided. The invention also relates to a throttle with a mounting kit according to the invention. 
     BACKGROUND 
     German laid-open application DE 10 2007 060 556 A1 discloses a transmission element with a toroidal core and three windings on the toroidal core. The toroidal core is arranged in a mounting kit having two half shells. The windings are wound onto the half shells. A covering hood is provided which completely covers the completed transmitter. The lower half shell is provided with securing pins which protrude towards the lower side of the throttle. 
     German laid-open application DE 103 08 010 A1 discloses a mounting kit for a throttle with, a toroidal core, wherein an insulating element which passes through the opening in the toroidal core is provided. The insulating element has three webs spaced apart from one another uniformly in the circumferential direction. The insulating element is provided for separating the windings on the toroidal core from one another. 
     SUMMARY 
     The intention of the invention is to provide a mounting kit for a throttle with a toroidal, core, the mounting kit facilitating the mounting of a throttle. 
     For this purpose, according to the invention, a mounting kit with the features of Claim  1  and a throttle with the features of Claim  15  are provided. Advantageous developments of the inventions are cited in the dependent claims. 
     The mounting kit according to the invention for a throttle with a toroidal core has an insulating element which passes through the opening in the toroidal core, wherein the mounting kit has a first half shell and a second half shell for accommodating the toroidal core, wherein a baseplate is provided, and wherein latching means and/or guide means are provided in order to connect the first half shell, the second half shell, the insulating element and the baseplate to one another. By the individual components of the mounting kit being connected by means of latching means and/or guide means, the individual components are automatically assigned to one another in a spatially correct manner when assembling the mounting kit. As a result, the throttle can be mounted more rapidly and with greater precision. In particular, provision can be made to design the guide means and latching means in such a manner that the throttle can be mounted without tools. For example, the mounting kit can also be provided for a fully automated mounting of the throttle. The first, half shell, the second, half shell, the insulating element and the baseplate are designed as forming separate parts. The baseplate is used to fix a throttle e.g. to a printed circuit board. 
     In a development of the invention, first latching means and/or guide means are provided for connecting the two half shells. 
     The two half shells can thereby be automatically connected in the correct position. 
     In a development of the invention, the first latching means and/or guide means have at least one first projection and two second projections, wherein, in the latched state, the first projection is accommodated at least in sections between the two second projections. 
     By means of such a design of the first latching means and/or guide means, an aligning function in the circumferential direction can be obtained. 
     In a development of the invention, second latching means and/or guide means are provided for connecting the first half shell to the baseplate. 
     The first half shell can thereby be latched onto the baseplate in the correct position. The baseplate can then be fastened, for example, to a printed circuit board or to another component using simple means. In an advantageous manner, combined latching and guide means are provided which firstly align the first half shell or the substantially completely mounted throttle relative to the baseplate in the circumferential direction and at the same time centre the throttle relative to the baseplate and also hold said throttle on the baseplate. 
     In a development of the invention, the second latching means and/or guide means have at least three projections which emerge from the baseplate and at the free ends of which latching lugs are arranged. 
     By means of three projections which are in particular spaced apart uniformly from one another in the circumferential direction, centering and simultaneous alignment in the circumferential direction can foe achieved. 
     In a development of the invention, the two half shells form a torus-shaped holder in the assembled state, wherein the projections extend into a through opening in the torus-shaped holder and lie against a wall forming the through opening in the torus-shaped holder. 
     The projections can thereby be accommodated in a space-saving manner and at the same time centre the torus-shaped holder and secure said holder on the baseplate. 
     In a development of the invention, third latching means and/or guide means are provided for connecting the insulating element to the baseplate. 
     With latching means and/or guide means, the insulating element can be aligned and at the same time held during the connection to the baseplate. The insulating element serves for separating the individual windings on the torus-shaped holder. 
     In a development of the invention, the insulating element has at least three plate-like webs arranged in a star-shaped manner, wherein radially outer edges of the webs are accommodated in guides on the baseplate. 
     In a development of the invention, the first half shell is provided with three insulating projections which are spaced apart uniformly in the circumferential direction and, in the mounted state, rest on the baseplate. 
     By means of such insulating projections on the first half shell, a predefined distance between the first half shell or the winding and the baseplate is obtained. The insulating projections separate the windings from one another. 
     In a development of the invention, the radially inner sides of the projections emerging from the baseplate are provided with guide grooves for accommodating the radially outer edges of the webs. 
     In a development of the invention, the first half shell and the second half shell form a torus-shaped holder for a toroidal core, and the insulating element and the holder are provided with fourth latching means and/or guide means which fit together. 
     In a development of the invention, the second half shell is provided with guide grooves for accommodating radially outer edges of the webs of the insulating element. 
     In a development of the invention, in the mounted state, the guide grooves of the second half shell are arranged in in each case one radial plane with the guide grooves of the projections of the baseplate. 
     In a development of the invention, the baseplate, the two half shells and the insulating element are formed as plastics parts, in particular injection moulded parts, which are in each case formed integrally. 
     The problem on which the invention is based is also solved by a throttle with a torus-shaped toroidal core, at least one wire winding surrounding the toroidal core in sections, and a mounting kit according to the invention, wherein the toroidal core is accommodated in a torus-shaped holder formed by the two half shells, and the wire winding is fitted onto an outer side of the torus-shaped holder. 
     In a development of the invention, ends of the wire winding are at least partially guided through through openings in the baseplate. 
     Further features and advantages of the invention emerge from the claims and the description below of preferred embodiments, of the invention in conjunction with the drawings. Individual features of the different embodiments which are illustrated and described can be combined with one another in any manner without exceeding the scope of the invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In the drawings: 
         FIG. 1  shows a view of a baseplate of a mounting kit according to the invention obliquely from above, 
         FIG. 2  shows a first half shell of the mounting kit according to the invention obliquely from above, 
         FIG. 3  shows the baseplate of  FIG. 1  and the first half shell of  FIG. 2  in the assembled state in a view obliquely from above, 
         FIG. 4  shows the baseplate, the first half shell and a second half shell of the mounting kit according to the invention in the assembled state in a view obliquely from above, 
         FIG. 5  shows the complete, assembled mounting kit according to the invention in a view obliquely from above, 
         FIG. 6  shows a throttle constructed with the mounting kit according to the invention in a view obliquely from below, 
         FIG. 7  shows the throttle of  FIG. 6  in a view obliquely from above, 
         FIG. 8  shows the throttle of  FIG. 7  in a view obliquely from below, 
         FIG. 9  shows a sectional view of the throttle of  FIG. 7 , 
         FIG. 10  shows the sectioned throttle of  FIG. 9  in a view obliquely from above, 
         FIG. 11  shows the insulating element of the mounting kit according to the invention in a view obliquely from above, and 
         FIG. 12  shows the baseplate of  FIG. 1  and the insulating element, of  FIG. 11  in the plugged-together state. 
     
    
    
     DETAILED DESCRIPTION 
     The illustration of  FIG. 7  shows a throttle  10  according to the invention in the mounted state on a printed circuit board  12  in a view obliquely from above. 
     The throttle  10  has a total of three windings  14 ,  16  and  18  which are wound spaced apart from one another onto a torus-shaped holder  20 . Connecting wires of the windings are each guided through the printed circuit board  12 , wherein this can only partially be seen. The torus-shaped holder  20  is arranged on a baseplate  22 . An insulating element  24  which has three webs spaced apart from one another uniformly in the circumferential direction and which separates the windings  14 ,  16  and  18  from one another is plugged into a through opening in the torus-shaped holder  20 . 
     The holder  20 , the baseplate  22  and the insulating element  24  form a mounting kit for the throttle  10  according to the invention, which mounting kit is explained more precisely below. 
     The illustration of  FIG. 1  shows the baseplate  22  in a view obliquely from above. The baseplate has a total of six through openings  26 ,  28 , wherein in each case two through openings  26 ,  28  are assigned to one of the windings  14 ,  16  or  18 . A winding start of the windings  14 ,  16 ,  18  is in each case plugged through one of the radially inner through openings  26  and guided through the baseplate  22 . A respective winding end is guided through one of the through openings  28  which are arranged radially outside the through openings  26  and are specifically arranged on radially extending extensions of a circular basic body of the baseplate  22 . 
     The baseplate  22  has three projections  30  which extend upwards from the baseplate  22 , towards the observer in the illustration of  FIG. 1 . The three projections  30  are spaced apart from one another uniformly in the circumferential direction and by an angle of 120°. The projections  30  are arranged around a central dome  32  of the baseplate  22 , wherein the dome  32  extends upwards from the basic body of the baseplate  22 . The dome  32  serves for the screwing-in of a fastening screw, see  FIGS. 8 to 10 , in order to fasten the throttle  10  to the baseplate  22 , see  FIG. 7 , and for guiding the insulating element  24 . 
     The projections  30  each have, on their radially inner side, a groove  34  which serves as guide means for the insulating element  24 . The groove  34  extends as far as the basic body of the baseplate  22 . 
     On their radially outer side, the projections  30  are each provided with latching lugs  36 . The latching lugs can also be replaced by differently designed latching means. Each projection  30  has, on its radially outer side, two latching lugs  36  and, between the latching lugs, a guide web  38  which runs perpendicularly to the basic body of the baseplate  22 . By means of the projections  30  and in particular by means of the latching lugs  36  and the guide webs  38 , a first half shell is anchored on the baseplate  22 . 
     Said first half shell  40  is illustrated obliquely from above in  FIG. 2 . The first half shell  40  forms a lower portion of a torus-shaped interior space  42  which is provided for accommodating a toroidal core of the throttle. Such a toroidal core is composed, for example, of ferrite material. The toroidal core can be placed into the first half shell  40  in a simple manner and is thereby already correctly positioned. 
     The first half shell has three pairs of guide webs  46  in the region of the wall of its through opening  44 , wherein two guide webs  46  belonging to a pair form a groove  48  between them. Said groove  48  is provided for accommodating the guide webs  38  on the projections  30  of the baseplate  22 , see  FIG. 1 . An upper end of the guide webs  46  in  FIG. 2  serves as a stop for the latching lugs  36  on the projections  30 . When the first half shell  40  is pushed onto the projections  30 , the projections  30  are first of all slightly bent radially inwards until the latching lugs  36  snap over the upper ends of the guide webs  46  in  FIG. 2  and thereby reliably secure the first half shell  40  on the baseplate  22 . By means of the guide webs  38  which engage in the grooves  48 , after the latching the first half shell is also secured in the circumferential direction in the designated position on the baseplate  22 . 
     As can be seen in  FIG. 1 , the upper sides of the latching lugs  36  are bevelled. This facilitates the placing on of the guide webs  46  of the first half shell  40 , and it is also made easier for the projections  30  to be deflected radially inwards when the first half shell  40  is pushed on in the direction of the basic body of the baseplate  22 . 
     Furthermore, the first half shell  40  is provided on its outer side with three projections  50  which are spaced apart from one another uniformly in the circumferential direction. These projections  50  are provided for engaging between in each case two projections  62  of a second half shell  60 , see  FIG. 4 . 
     Furthermore, the first half shell  40  is provided on its lower side with three insulating projections  52  which are spaced apart from one another uniformly in the circumferential direction and of which only one can be seen in  FIG. 2 . In the mounted, state, the insulating projections  52  rest on the baseplate  22  and thereby keep the first half shell  40  at a predefined distance relative to the baseplate  22 . The insulating projections  52  also separate the windings  14 ,  16 ,  18  from one another, see  FIG. 7 . 
       FIG. 3  shows the first half shell  40  and the baseplate  22  in the mounted state. It can be seen that the latching lugs  36  of the projections  30  on the baseplate  22  are now snapped over the upper ends of the guide webs  46  on the first half shell  40 . The first half shell  40  is thereby held fixedly on the baseplate  22 . As has been explained, the guide webs  38  on the projections  30  ensure that the first half shell  40  is also placed in the circumferential direction in the designated position on the baseplate  22 . 
     The illustration of  FIG. 4  shows a second half shell  60  in the mounted state on the first half shell  40  and the baseplate  22 . The second half shell  60  is placed onto the first half shell  40  in such a manner that the projections  50  of the first half shell  40  are each accommodated between two projections  62 , protruding in the radial direction, on the second half shell  60 . The second half shell  60  is thereby correctly positioned in the circumferential direction relative to the first half shell  40 . 
     The two half shells  40 ,  60  thereby form the torus-shaped holder  20 , see  FIG. 7 . A toroidal core of the throttle can be placed into the torus-shaped interior space of the holder  20 , and the windings  14 ,  16 ,  18  can be placed onto the torus-shaped holder  20 . During the mounting of the throttle  10  according to the invention of  FIG. 7 , the toroidal core is expediently first of all placed into the interior space of the first half shell  40 . After the second half shell  60  is placed, onto the first half shell  40 , the holder  20  is completed and can now be provided with the windings  14 ,  16 ,  18 . Only when the holder  20  is provided with the windings  14 ,  16 ,  18  is said holder placed onto the baseplate  22 . 
     The upper half shell  60  has, in the radial direction, inwardly open guide grooves  64  which are each formed between two guide webs  66 . The grooves  64  and the guide webs  66  are each formed at the radially inner end by insulating projections  68  which are in the shape of circular ring segments and are arranged spaced apart from one another uniformly in the circumferential direction on the upper side of the second half shell  60 . One of the windings  14 ,  16 ,  18  is in each case arranged between in each case two projections  68 , In the mounted state, the insulating projections  68  on the upper half shell  60  are each arranged in alignment with the insulating projections  52  on the lower half shell. The grooves  64  serve for accommodating and guiding webs of the insulating part  24 , see  FIG. 7 . 
     It can be seen with reference to the illustration of  FIG. 4  that, in the mounted state of the second half shell  60 , the grooves  64  and the grooves  34  on the inner side of the projections  30  on the baseplate  22  lie in in each case one radial plane. The insulating part  24  can therefore first of all be pushed by its webs into the grooves  64  and then also into the grooves  34  and is thereby automatically correctly positioned with respect to the baseplate  22  and the holder  20 . 
     The illustration of  FIG. 5  shows the holder  20  in the mounted state on the baseplate  22 , wherein the insulating part  24  has additionally also been pushed into the interior space of the torus-shaped holder  20 . The radially outer edges  80  of the webs of the insulating part  24  are now accommodated in the grooves  64  and  34 , compare  FIG. 4 . 
     The illustration of  FIG. 6  shows the throttle  10  of  FIG. 7  in a view obliquely from below. The windings  18  and  14  on the holder  20  can be seen. Furthermore, the through openings  26 ,  28  in the baseplate  22 , through which in each case one winding start or one winding end of the windings  14 ,  16 ,  18  is guided, can be seen. The winding starts or winding ends are thereby accessible in a very simple manner from the lower side of the baseplate  22 . 
     It can furthermore be seen in the view of  FIG. 6  that the first half shell  40  is provided with the downwardly protruding projections  52  which are in the manner of circular ring segments and firstly separate the windings  14 ,  16 ,  18  from one another and secondly ensure a predefined distance of the windings  14 ,  16 ,  18  from the upper side of the baseplate  22 . The holder  20  or the first half shell  40  rests with the lower side of its projections  52  on the upper side of the baseplate  22 . 
     The illustration of  FIG. 8  shows the throttle  10  of  FIGS. 6 and 7  in a view from below. A holding screw  70 , not illustrated in  FIG. 6 , which is screwed through a through opening into a lower side of the dome  32  in the baseplate  22  can be seen in this view. The throttle  10  can thereby be reliably fastened to the printed circuit board  12  with a single screw, namely the holding screw  70 . 
     The illustration of  FIG. 9  shows the throttle  10  of  FIG. 8  in the sectioned state. A toroidal core  72  arranged in the interior space of the holder  20  can be seen in this view. 
     The illustration of  FIG. 10  shows the sectioned throttle  10  of  FIG. 9  in a view obliquely from above. 
       FIG. 11  shows the insulating element  24  in a view obliquely from above. The three webs  74  which extend outward in the radial direction and are spaced apart from one another uniformly by 120° in the circumferential direction can be seen. The webs  74  are provided in the region of their side surfaces which are adjacent to the outer surfaces with wedge-shaped latching hooks  76  which ensure a play-free fit of the webs  74  in the grooves  64 , see  FIG. 4 . It can also be seen that the webs  74  are formed shorter in a lower region in the radial direction. The webs  74  are thereby adapted to the position of the grooves  34  in the projections  30  of the baseplate  22 , see  FIG. 4 . At the lower end of the insulating element  24 , the webs  74  have a central recess  78 . The dome  32  of the baseplate  22  is accommodated in said recess. The insulating element  24  and therefore also the holder  20  are thereby further secured and centred. 
     The illustration of  FIG. 12  shows the insulating element  24  in the mounted state on the baseplate  22 . It can be seen how the dome  32  of the baseplate  22  now projects into the central recess  78  of the insulating element  24 .