CN1205056A - Plastic nut for joining plate-like parts - Google Patents

Abstract

The present invention relates to a plastic nut for inserting into a through hole on a plate-like parts composed of multiple fixing parts, wherein one fixing part is designed as a flange which can be pressed to the plate-like parts from the fixing side of the parts, and another fixing part is designed as a snap hook which can be pressed into and locked on the back of the plate-like parts from the opposite side of the parts; the fixing part is disposed with a nut part which has a receiving hole for putting one bolt; the flange is one part of the flange parts enclosing the nut part and can press the nut part in flange direction. Here, an elastic support mechanism of an elastic area is formed, and the nut part moves in axial direction relative to the flange part can be pressed in the flange direction, once the plastic nut is inserted, the elastic area presses the nut part and the flange part on the plate-like parts, and the different thickness of the parts can be compensated.

Description

Be used to connect the plastic nut of plate-shaped member

The present invention relates to a kind of plastic nut, in a through hole that inserts a plate-shaped member of forming by retaining element, one of them retaining element is designed to the flange on can be from the attachment face pressing of parts to parts, and another retaining element then is designed to and can presses from the back side of parts into a chucking hook at parts back side lock function; And retaining element is provided with a nut portion, and nut portion has the boring that can place one piece of screw; Flange is the constituent element that constitutes around the flange portion of nut portion, can be along the direction pressing nut portion of flange.

Such nut discloses in German patent DE-OS 2928619.This nut plastic monoblock moulding in the prior art mainly is made of a nut portion that has the boring that can place one piece of screw, and nut portion links to each other with the two halves flange that is arranged on its both sides through film hinge.When nut portion respectively links to each other respectively with the two halves flange with a slice film hinge, can be with whole member together with the two halves flange spray moulding that trails in both sides, pass through then two halves flange pressing on nut portion, can produce the plastic nut finished product by the elasticity of film hinge, its nut portion is linked to each other with the two halves flange and can not move vertically.Stretch out chucking hook and insertion slope disposed thereon from the both sides of nut part, when linking the two halves flange on the parts, rebound, simultaneously on the back side of parts during fastening, when plastic nut was inserted in the through hole of plate-shaped member, these chucking hooks were pressed in together.Owing between chucking hook and two halves flange given spacing is arranged, the plastic nut of prior art can insert in the through hole of plate-shaped member, and plate-shaped member then has thickness different, that be not more than this spacing.When inserting through hole, because having the slit between two halves flange and chucking hook, plate-shaped member exists, and plastic nut can only keep the state that becomes flexible certainly, and for the member of prepackage, particularly when transportation and use later on, this situation is undesirable.On the plastic nut of prior art, realize by following way with fixedlying connected of plate-shaped member: nut portion and its chucking hook are tightened on the direction of two halves flange with one piece of screw that screws in nut part, so as to film hinge is pulled apart, and under the effect of precession action, nut portion is expressed on the plate-shaped member together with its chucking hook.When unclamping screw, it is loosening that the relative plate-shaped member of plastic nut is taken place.

The objective of the invention is, a kind of plastic nut of above-mentioned prior art is provided, this plastic nut can be fixed on the plate-shaped member with different-thickness in some way, makes plastic nut adapt to corresponding component thickness automatically, and becomes a kind of shockproof connection.

The way that achieves the above object is, by forming an elastic support structure of an elastic region, can be along the pushing of flange portion direction with respect to the axially movable nut portion of flange portion, in case plastic nut is inserted into, weak property district is connected on the parts nut portion and flange portion, and has compensated the different-thickness of parts.

The elastic region of working between nut portion and two halves flange provides an elastic support structure, make nut portion press to the flange direction automatically by this supporting structure, its result, plastic nut is under the effect of the elastic force of elastic region generation, flange and chucking hook thereof by it are fixed on the parts, do not make and can vibrate, so, between plastic nut and parts, formed and can not rock thereby also can not send being connected of card tower sound.Therefore, place in equilibrium under the situation of different-thickness of parts of plastic nut, in case behind the insertion plastic nut, the elastic region can make nut portion and flange portion rely on to screw screw and be close on the parts, like this, as long as insert plastic nut, between parts and plastic nut, form non-vibrating connection surely with regard to one.

When a screw being screwed in nut portion and tightening, may produce rotation in order to prevent nut portion with respect to flange portion thereupon, flange portion is provided with a guider that is used for nut portion, does not rotate in order to can make flange portion retention nut part.

For this reason, press to the flange direction to nut portion by an elastic support structure that constitutes the elastic region.Plastic nut thereby can be fixed on the relevant parts voluntarily, like this, when elastic support structure deformed in its elastic region scope, plastic nut was fixed with respect to parts, do not make and can vibrate, thereby between plastic nut and parts, realize not having the connection of rocking thereby do not have yet card tower sound.Certainly, also may only loosely press close to parts by plastic nut this moment when plastic nut being inserted in the parts that approach especially, but can be by being used for another assembly is fastened to the effect of tightening of the screw of using on the plate-shaped member, plastic nut is fixed on these parts, thereby is fixed on the parts at last.

Place in compensation under the situation of different-thickness of parts of plastic nut, in case after inserting plastic nut, the elastic region can make nut portion and flange portion be close on the parts, like this, just forms non-vibrating connection between parts and plastic nut.

For this reason, become tabular to flange design, to nut portion chucking hook is set then.When plastic nut is inserted parts, be designed to tabular flange and be placed on the parts subsequently, and over there, the chucking hook of nut portion tightens in the behind of parts, thereby plastic nut and parts are coupled together.

Another kind of possible plastic nut forming method is, flange is divided into some quadrants, respectively is equipped with a chucking hook.In this case, chucking hook and the parts fastening of plastic nut by linking together with flange, nut portion then forms the support seat with respect to chucking hook.

Be equipped with chucking hook as nut portion, plastic nut is particularly suitable for being inserted in the through hole of parts, and makes nut portion preceding; On the other hand, when flange is equipped with chucking hook, then might be with in the through hole in the nut portion insertion parts and make flange preceding.In addition, also might also be equipped with chucking hook to nut portion when being equipped with chucking hook to flange, its objective is, such nut portion both can be inserted in its through hole from a side of parts, also can insert in its through hole from its opposite side.

In order to make nut portion that reliable guiding be arranged in flange portion, therefore design flange portion to such an extent that it can be resembled the sleeve round nut portion.

For fear of strap configurations generation over-stress, therefore for flange portion and nut portion suitably are provided with block, with of the axial motion of restriction nut portion with respect to flange portion.

By nut portion being interconnected into integral body mutually with flange portion, can advantageously produce nut portion and flange portion with the plastic tape that forms the elastic strip structure.

Can also nut portion and flange portion be kept together by tightening device, this device works when pushing nut portion in the flange portion.

In a kind of suitable structure, this tightening device comprises elastic strip suitably.

In order to guarantee that when one piece of screw is screwed in nut portion flange portion is not in company with rotating, for flange portion is provided with an anti-rotation device that is suitable in the receiving through-hole in its side in the face of nut portion.

Can also plastic nut design handy it realize sealing to through hole.Can reach this purpose by the way that a seal area is set for flange.

For the moulding that makes plastic nut helps placing one piece of screw, the hole that places of nut portion is designed consciously, make this place the hole and form a through hole, and one section narrow of adjacency with it arranged in a side in the face of flange.Like this, place the hole and can place screw, and the process of being screwed into is subsequently played guiding function through its that segment length that forms through hole.Establish for the screw thread that places screw with the narrow of through hole adjacency.For this reason, the diameter of narrow can be decided to be the screw-in that can guarantee the Thread Forming TF screw.But narrow also can be mixed screw thread, and the screw thread of the screw that makes it and screw in matches.The screw-in of screw for convenience places Kong Zaiqi and enters on the changeover portion of narrow and can establish a skewed slot like screw thread with one or more step, allows screw screw in this skewed slot easily.

For the possibility of the different-thickness that enlarges compensating unit, can be that flange is mixed the locking protrusion to a side of parts at flange surface, but the behind of this locking protrusion insertion parts away from flange one side.In this case, the elastic region of elastic strip can be used for thick especially parts basically, and for being installed to situation on the especially thin parts to plastic nut, can utilize the locking protrusion that parts are fixed on the plastic nut.

The structural design of plastic nut also can accomplish, it can be compensated with respect to flange portion and with respect to the bigger tolerance of the position of the through hole on the plate-shaped member from the screw that placed by it relevant.For this reason, be that nut part is reserved certain gap of radially relatively moving of allowing with respect to vibrating part.Flange portion also utilizes this gap guiding nut part, so that can select with respect to parts screw to be screwed in the position of nut portion in this interstice coverage.

In addition, chucking hook is played a role in special mode.Specifically, can carry out elasticity to chucking hook and nut portion and be connected, make chucking hook when inserting, can freely pass through through hole basically, and when fastening, can outwards eject by screwing in one piece of screw.Like this, can make plastic nut easily insert the through hole of plate-shaped member, be when being made by sensitive material at parts especially, especially true.This be because: the imagination structure situation under, chucking hook can in fact contactlessly pass through through hole, its result, the material of plate-shaped member does not have opposite influence to it.For wanting the fastening chucking hook, can use the way that screws in one piece of screw, when the screw screw-in was placed the hole, screw just outwards pushed up chucking hook, so that chucking hook is placed a side of parts away from flange part.Can be in this way by screw at roof pressure radially to chucking hook, between plastic nut and parts, cause firm being connected.

Improvement in another design is, chucking hook enters nut portion rigidly, nut portion then is connected with flange portion through an elastic support structure, this elastic support structure not only withstands nut portion on the direction of flange portion, and makes nut portion keep torsional elasticity with chucking hook with respect to flange portion.According to this design of plastic nut, can insert plastic nut in one through hole, in this through hole, based on an anti-rotation device that matches with through hole on plastic nut, plastic nut can maintain voluntarily and not rotate; Therefore simultaneously, keep torsional elasticity in clamp position with respect to flange portion, it can be turned to a certain position,, can pass recess on the through hole with its rigidly connected chucking hook in this position based on nut portion.Then, chucking hook has tensionally elastic clamp position based on it and bounces back into parts behind, so it makes a decision in the behind of parts, and withstands parts, and plastic nut and parts are coupled together.

Expressed embodiments of the invention in the accompanying drawing, wherein:

Fig. 1 a is four views of expression plastic nut to 1d, and wherein chucking hook becomes the constituent element of flange portion;

Fig. 2 a is three views only representing the flange portion of plastic nut shown in Figure 1 to 2c;

Fig. 3 a is three views only representing the nut portion of plastic nut shown in Figure 1 to 3c;

Fig. 4 a represents plastic nut shown in Figure 1 to 4d, and this plastic nut is with a waveform supporting member;

Fig. 5 a represents four views of plastic nut to 5d, and wherein chucking hook is located on the nut portion, and elastic strip becomes supporting member;

Fig. 6 a is three views of flange portion of the plastic nut of a presentation graphs 5 expression to 6c;

Fig. 7 a is three views only representing the nut portion of plastic nut shown in Figure 5 to 7c;

Fig. 8 one is installed in plastic nut shown in Figure 5 on the plate-shaped member and a spiral shell thereon the erection drawing of sub-component admittedly;

Fig. 9 represents a plastic nut, wherein is equipped with chucking hook on nut portion and the flange portion;

Figure 10 a and 10b are two views of expression plastic nut, and wherein flange portion and nut portion are two independent parts;

Figure 11 represents to have a plate-shaped member of a through hole, and this through hole can make in a special mode and prevent that this plate-shaped member from rotating;

Plastic nut shown in Figure 12 presentation graphs 5d has the cross bar that can prevent nut rotation usefulness on its flange portion;

The modification of the plastic nut shown in Figure 13 presentation graphs 10a and the 10b, wherein flange portion and nut portion are to be made of all independent parts;

Figure 14 represents to be provided with the plastic nut of sealing;

Figure 15 represents and the similar plastic nut of the plastic nut of Fig. 5, has the safty device that adopt additional stop pin;

Figure 16 a is a kind of four views of structural design to 16d, wherein, can utilize the screw that screws in can be with chucking hook to external pressure;

Figure 17 a is a kind of enforcement pattern of representing with four views equally that has chucking hook to 17d, and chucking hook keeps rotating elasticity with respect to flange portion, and enters nut portion rigidly;

Figure 18 a is three views only representing the flange portion of plastic nut shown in Figure 17 to 18c;

Figure 19 a is three views only representing the nut portion of plastic nut shown in Figure 17 to 19c;

Figure 20 represents to have a plate-shaped member of the recess of using for the installation plastic nut.

Represent a plastic nut at Fig. 1 a to the embodiment shown in the 1d, flange wherein is furnished with chucking hook.

Fig. 1 a and 1b show plastic nut 30 respectively.Can see from the side, with the state of flange portion 31 complete combinations in, plastic nut reaches flange quadrant 32,33, this flange quadrant radially outward forms chucking hook 34,35 in the end.Flange portion 31 resembles the sleeve round nut portion 36, and exactly, nut portion 36 can be in axial direction with respect to flange portion 31 displacements.From nut portion 36 protruding two bearings 37,38, they are expressed out in the detail drawing of the nut portion 36 of 3c at Fig. 3 a significantly. Bearing 37 and 38 is rigidly connected with nut portion 36 basically.Fig. 1 c represents the view of the plastic nut of looking from above, and it shows bearing 37,38 and chucking hook 34,35 significantly.In addition, as can be seen by through hole 41 be designed to the hole that places that the narrow 42 of blind hole constitutes here, their effect is identical to the part of the same name shown in the 5d with Fig. 5 a from Fig. 1 c.Fig. 1 d represents the plastic nut of looking from below.Here, identical shown in situation embodiment illustrated in fig. 5 to the structure of nut portion 36 with respect to the restricting means of the axial motion of flange portion 31.

Fig. 2 a is three views only representing flange portion 31 to 2c.Fig. 3 a then only represents nut portion 36 to 3c.

Fig. 4 a has represented Fig. 1 a to the plastic nut shown in the 1d to 4d, has replenished elastic support structure 38a, the 40a of a formation elastic region certainly again.At Fig. 1,2,3 and the Zhu Tuzhong of Fig. 4, adopt identical label, wherein, interrelate with plastic nut, Fig. 4 a has added one " a " to all labels among the 4d.

Nut portion 36a and flange portion 31a are linked together by waveform supporting structure 39a, 40a, this supporting structure respectively has one leg to stretch out along the direction of leaving chucking hook 34a, 35a from flange portion 31a, and to form crest portion be the wave line of 40a, and this crest portion pushing is towards that end face of its nut portion 36a.The elasticity of supporting structure 39a, 40a can make nut portion 36a move and leave chucking hook 34a, 35a, and the result makes in the distance A shown in Fig. 4 b (also can referring to Fig. 1 b) and correspondingly changes, and especially can become big.

When supporting structure 39a, 40a in any mode, for example by bonding, when coupling together with the end face of nut portion 36a, just produce between flange portion 31a and the nut portion 36a and fixedly connected, even, if nut portion 36a is to form with supporting structure 39a, 40a spray with flange portion 31a, may form integral body in the plastic processing process.In addition, about configuration and the action principle of Fig. 4 a to the plastic nut of 4d, referring to Fig. 1 a to corresponding explanation that 1d did.

Fig. 5 a relates to a kind of plastic nut to the embodiment shown in the 5d, and its nut portion is furnished with chucking hook.

Fig. 5 a and 5b show plastic nut 1 respectively.Look from the side, with the state of flange portion 2 complete combinations in, plastic nut reaches flange 3.Flange portion 2 resembles the sleeve round nut portion 4, and exactly, nut portion 4 can be in axial direction with respect to flange portion 2 displacements.Stretch out two chucking hooks 5 and 6 from nut portion 4 radially outwards, this chucking hook towards the supporting surface 7 of flange 3 and 8 and the supporting surface 9 and 10 of geared nut part 4 A that keeps at a distance.This distance A is to draw under the unassembled state of plastic nut 1.For the clear internal styling of expressing plastic nut 1 in Fig. 5 a with removing, that cancelled flange portion 2 among Fig. 5 a and the part in the face of observer nut portion 4, to expose the hole that places of one piece of screw (not shown) in the nut portion 4, it is to be made of through hole 11 and adjacent with it narrow 12, and the diameter of this narrow is less than through hole 11.Therefore, the screw that one piece of screw-in places hole 11/12 can freely pass through in the scope of through hole 11 earlier, when further screw-in narrow 12, otherwise in this scope Thread Forming TF, or be screwed in the narrow 12 in the existing screw thread (this screw thread does not illustrate in Fig. 5 a).Continue to extend along the direction to flange 3 in the circular channel 29 of through hole 11 in flange 3, the screw that therefore enters plastic nut 1 can pass flange 3 and enter through hole 11.As seen, the diameter of passage 29 is greater than through hole 11, so, side from flange 3, can use a kind of instrument, certain axial pressure is applied to the end face 99/100 of the nut portion 4 that can see in Fig. 5 c, this pressure can be pressed in the through hole of parts plastic nut 1.

Flange portion 2 and nut portion 4 are interconnected through two elastic strips 13 and 14. Elastic strip 13 and 14 stretches out to constitute " U " word along the direction of leaving flange 3 from flange portion 2 with one leg, and the one leg in addition that is somebody's turn to do " U " is positioned at that side of the away from flange 3 of nut portion 4, and fixedlys connected with nut portion 4.This situation relates to a single-piece part that comprises flange portion 2 and nut portion 4, and it is that spray forms, and therefore, elastic strip 13 and 14 all is made of plastics, and because its thickness is little, so have sufficient elasticity.Based on such elasticity, nut portion 4 can move vertically and leave flange, thereby has correspondingly enlarged spacing A.

Flange portion 2 utilizes certain gap S (seeing Fig. 5 a, b and d) guiding nut part 4 that can radially move mutually.This gap S is made of the spacing in a scope between flange portion 2 shown in above-mentioned three figure and the nut portion 4, and in this scope, flange portion 2 resembles the sleeve round nut portion 4.Such structure can radially move nut portion 4 with respect to flange portion, simultaneously, elastic strip 13 and 14 is done correspondingly crooked based on its elasticity.Thus, the tolerance of size of flange portion 2 and nut portion 4 can be compensated, in addition, also can make thus nut portion 4 at the scope endoadaptation of gap S in a screw (see figure 8) that may be offset.

Fig. 5 c is the sectional view along the I-I line among Fig. 5 a, therefore can see supporting surface 7 and 8 in Fig. 5 c.Simultaneously, can also see elastic strip 13 that flange portion 2 and nut portion 4 are connected with each other and 14 curved section 15 and 16.What the elastic movement of chucking hook 5 and 6 was played guarantee effect is in the slit of stretching into from the side of flange 3 nut portion 4 17 and 18.Its result, what remain has only area B in the nut portion, and it has making the moved section of guarantee effect of chucking hook 5 and 6.

Fig. 5 d is depicted as the plastic nut of looking from a side of away from flange 3, and at this moment, towards the observer is two chucking hooks 5 and 6 and elastic strip 13 and 14.In addition, the observer can also see narrow 12 and resemble the sleeve flange portion 2 round nut portion 4.

Should also be noted that flange portion 2 is provided with an inlet slope (Einlanufschrage) 19 in a side of its away from flange 3, this inlet slope can make plastic nut 1 through hole of insertion parts easily, also can carry out this automatically and insert operation.

In addition, Fig. 5 a also shows block 20,21 in the zone of flange portion 2 away from flange 3, and this block is distributed on the flange portion 2 between slit 17 and 18, and with chucking hook on corresponding block 22,23 play a role jointly.Therefore, related chucking hook 5 and 6 nut portion 4 can be left flange 3 till block 20-22 and 21-23 can be fashionable by roof pressure, thus restriction nut portion 4 moving with respect to flange portion 2.So also just define the maximum spacing A between supporting surface 7/9 and 8/10 simultaneously, in other words, plastic nut 1 can only be assembled on the plate-shaped member with respective thickness.

Fig. 5 c shows flange portion 2 always a window 24 (referring to Fig. 6 b), and chucking hook 5 or 6 is by this window.The axially extended edge of window 4 has constituted the block that nut portion 4 is provided constraints with respect to the rotation of flange portion 2, can prevent that therefore flange portion 2 from rotating with nut portion 4.

Only show three views of flange portion 2 in the 6c at Fig. 6 a, wherein flexible pin with 13 and 14 stretches to said flange portion.

It can also be seen that the window 24 in the flange portion 2 from Fig. 6 b, the chucking hook 5 and 6 of nut portion passes therethrough.The width of window 24 also can find out from Fig. 5 b, limits because this width is a outer wall by slit 17 and 18.

Fig. 7 a expresses three views of nut portion 4 itself to 7c, and wherein two chucking hooks 5 and 6 are to be drawn among Fig. 7 a with the curved state with dashed lines that closes.Can show roughly like this when chucking hook 5 and 6 was inserted in the through hole of parts, how they moved.When the nut portion 4 of relevant plastic nut was contacted with on the parts by its flange 3, chucking hook just bounce back into its normal position, and in the fastening of the behind of parts.

Fig. 8 shows Fig. 5 a to 5d, Fig. 6 a to 6c with Fig. 7 a situation about coupling together to plastic nut shown in the 7c 1 and plate-shaped member 5, wherein parts 25 are maintained between flange 3 and the chucking hook 5,6, in this case, owing to tension force intrinsic in elastic strip 13 and 14, flange 3 and chucking hook 5,6 are compacted.Pass at flange portion 2 under the situation of through hole 26 of parts 25, screw 27 is screwed into nut portion 4 with fixed structure unit 28 (sub-component), this screw is moved on the plastic nut 1 with its head bar structure unit 28, and then move on the plate-shaped member 25, so said element of construction is fastened on the parts 25.

Plate-shaped member 25 can be used as for example any body upholstery of certain vehicle, may on this lining, fix certain accessory, sub-component or analog, need for this reason durable, can bearing load and non-vibrating connection, the wall thickness of depending merely on parts usually can not provide enough intensity for such connection.In this case, the superiority of plastic nut of the present invention is, the installation of above-mentioned sub-component or analog only need be operated in this side that this sub-component is installed, do not need oppositely fixing in the behind of parts yet, for example fix, because in fact the structural design of plastic nut of the present invention and installation method become this nut one constituent element of plate-shaped member with one piece of nut.At this moment, automatically the length of related its nut portion of plastic nut that forms helps the join strength of parts and sub-component, can utilize the multiple tracks screw thread to anchor on the length of whole nut portion because be screwed into the screw self of plastic nut, thereby make the screw firm fixing in nut portion.

Plastic nut 30a shown in Figure 4 can be advantageously in the through hole of a side insertion parts that deviates from elastic support structure 39a, 40a, during insertion by flange quadrant 32a and 33a guiding.In this case, chucking hook 34a, 35a touch by the side edge of inlet slope 43a, 44a and through hole, and the result radially curves inwardly chucking hook 34a, 35a slightly.This can realize that this slit is stretched over the flange portion 31a from the side of chucking hook 34a, 35a by slit 45a, 46a.About the elastic movement characteristic of chucking hook 34a, 35a, can be referring to above to the explanation of area B among Fig. 5 a.

Installation process and situation Fig. 8 (label 25) shown in of plastic nut 30a on a plate-shaped member is similar, as indicated above, by plastic nut 30a is inserted through hole 26 (Fig. 8), up to the outside bullet of chucking hook and till reaching the behind of parts 25, parts 25 are supported on bearing 37a and the 38a at its opposite side.Under the situation of thickness greater than spacing A shown in Fig. 4 b of parts, can produce the situation that nut portion 36a breaks away from chucking hook 34a, 35a, at this moment, supporting structure 39a, 40a are in stress, thereby chucking hook 34a, 35a are pressed on the parts 25 from the one side, and bearing 37a and 38a are pressed in parts 25 from opposite side, and like this plastic nut 30a is installed on the parts 25, guarantee firmly and can not vibrate.Then, can adopt in the same way, in conjunction with mode shown in Figure 8 another element of construction being installed on the plastic nut 30a as mentioned, and then be fixed on the described parts with one piece of screw.

As mentioned above, if the plastic nut of Fig. 5 to 7 is such plastic nut, it has only nut portion 4 to be furnished with chucking hook 5,6, the direction of the through hole 26 of plastic nut 1 insertion parts 25 will rely on the guiding of elastic strip 13 and 14 to realize at this moment, in contrast, the plastic nut 30 of Fig. 1 to 3 is furnished with chucking hook 34,35 on flange quadrant 32,33, at this moment, just can be installed to this plastic nut 30 on the parts along the direction by the guiding of this chucking hook 34,35.

Below in conjunction with Fig. 9 another one embodiment is described, it both is designed to be can be from a side of parts, also can be from opposite side, and it is pushed in the parts goes.

With regard to nut portion, the nut portion of plastic nut 47 shown in Figure 9 has identical structure with the nut portion 4 shown in Fig. 5 and 7 basically.It has two chucking hooks 5 and 6 (adopting identical label with Fig. 5).As shown in Fig. 7 a, two chucking hooks 5 and 6 can be pressed together, thereby can utilize the guiding of elastic strip 48,49 that nut portion 4 also is inserted in the relevant parts and go.On the other hand, plastic nut 47 also can push along opposite direction in the through hole of parts and go, and just utilizes the guiding of chucking hook 34/35 to insert, and adopts the chucking hook of same numeral in this chucking hook corresponding diagram 1.By to chucking hook 5 and 6 and the various settings of chucking hook 34 and 35, plastic nut 47 can be made multiple use.

Figure 10 a and 10b show plastic nut 50, and at this moment, flange portion 51 has adopted somewhat different than the mode of Figure 4 and 5 illustrated embodiment with nut portion 52 and kept together.The essential structure of plastic nut 50 is equivalent to the plastic nut of Fig. 1 a to 1d, and therefore, synthetic about flange portion 51 and nut portion 52 can be referring to the explanation of Fig. 1 a to 1d.According to Figure 10 a and 10b, elastic strip 53,54 has formed a kind of bottom from flange portion 51 and has stretched out, radially aduncate hook.Each bent angle portion 55,56 reaches respectively in the hole 57,58 on arm 59,60.This arm 59,60 is stretched from nut portion 52, and utilizes its hole 57,58 to form the portion that places of the curved part 55,56 of elastic strips 53,54.Elastic strip 13,14 shown in the embodiment of Figure 4 and 5 or 39a, 40a and relevant nut portion 4 or 36 direct whole the connection are replaced by bent angle portion 55,56 and affiliated hole 57,58 in the embodiment of Figure 10 a and 10b.Plastic nut 50 by two separately the part of spray constitute, the connection of these two parts causes like this: earlier bent angle portion 55,56 is outwards bent when resembling the sleeve in the flange portion 51 of this nut portion 52 when nut portion 52 is inserted, till when this expansion portion is positioned at the opposite in hole 57,58, then this bent angle portion 55,56 is buckled in the described hole.Because the elasticity of elastic strip 53,54, this buckles into process and can realize fully.Desired during in view of installation plastic nut 50, elastic strip 53,54 provides nut portion 52 to move necessary gap with respect to flange portion 51 together with its bent angle portion 55,56, therefore, plastic nut 50 can particularly be installed on the parts in conjunction with Fig. 4 and 6 described modes according to above.

Figure 10 a shows the step 64 in the hole of placing in nut portion 52, it is made of through hole 61 and narrow 62, this places the hole is by causing many screw-shaped skewed slots to form in the transition zone of narrow 62 by through hole 61, the first lap screw thread of the screw that is screwed into more easily is screwed in the narrow 62, certainly, in embodiment mentioned above, also can make such structural design for through hole.

In Figure 10 b, illustrated one and rotated the side view of 90 ° plastic nut 50, there is shown another characteristics of this plastic nut, the protuberance 65,66 that radially outward stretches out on Here it is the flange portion 51 with respect to Figure 10 a.This protuberance 65,66 is furnished with inlet slope 67,68, can make plastic nut 50 insert the through hole of parts easily, and the part of these parts is illustrated in Figure 11.

Figure 11 has represented the plan view of the part of parts 69, and these parts have a manhole that has two recesses 71,72, and as can be seen protuberance 65,66 can be packed in the recess 71,72 from Figure 10 a and 10b.Protuberance 65/66 and two depressions 71 and 72 acting in conjunction have produced a device that prevents that flange portion 51 from rotating with respect to parts 69.The diameter of through hole 70 selected will be accomplished to make the flange portion of sleeve shape to be inserted in the clear in this through hole 70 and go.

To the plastic nut of 5d, also can correspondingly design a device that prevents that flange portion from rotating with respect to parts at Fig. 5 a, specifically, be exactly by in the face of a side of associated components cross bar (as shown in figure 12) being installed at flange 3.The complete corresponding diagram 5a of plastic nut shown in this figure is to the plastic nut shown in the 5d, and the difference of Figure 12 and Fig. 5 d is, according to Figure 12, cross bar 73,74 only has been installed on flange 3, this cross bar can insert in the corresponding rectangular through-hole on the parts according to the order of sequence, thereby can prevent flange 3 in this through hole, so that plastic nut rotates with respect to relevant parts.

For the plastic nut that makes Figure 12 inserts in the rectangular through-hole easily, cross bar 73,74 respectively is provided with an inlet slope 75,76.

Figure 13 shows a kind of variation of the plastic nut 50 shown in Figure 10 a, the 10b, and it only is the structure style that engages between flange portion 51 and the nut portion 52 with the difference of plastic nut 50.The plastic nut 77 of Figure 13 has the elastic strip identical with plastic nut 50 in principle.But its bent angle portion 55 and 56 arms 78,79 with respect to shortening on the plastic nut 77 constitute blocked parts, thereby restriction nut portion 52 enters flange portion 51.In order to stop nut portion 52 to be moved along backward directions, on flange portion 51, preset special stop pin 80,81, this stop pin is because its inlet slope can or allow nut portion 52 insert flange portions 51 easily.After nut portion 52 entered flange portion 51 fully, stop pin was in nut portion 52 fastenings behind, and its result makes this nut portion because the pass of its space ties up to direction of advance and direction of retreat is all restricted.Because the elasticity of bent angle portion 55,56, but still retention nut part 52 with respect to the necessary activity space of flange portion 51 motions.

Plastic nut of the present invention can be advantageously provided a sealing.This can be illustrated in conjunction with Figure 14, there is shown a plastic nut 82, and this plastic nut is equivalent to the plastic nut 1 of Fig. 5 in principle.For this reason, only show the basic building block of relevant therewith plastic nut among Figure 14 one by one.Obviously as seen, plastic nut 82 has the chucking hook 5 and 6 (Fig. 5 a also illustrates like this) of two nut portion 4, still.Flange portion 83 slightly changes with respect to the flange portion of Fig. 5.In other words, flange portion 83 terminates on the flange 84, and flange 84 is furnished with the sealing lip 85 of periphery on its edge.Sealing lip 85 is placed on the parts that plastic nut passes, and can seal between flange 84 and parts like this.Difference between structural type shown in Figure 5 and the structural type shown in Figure 14 is that mainly the flange 3 of Fig. 5 is replaced by the flange 84 of band sealing lip 85.This is the subsidiary Sealing of loading onto of quilt of a band sealing lip.But, the Sealing that also might be designed to itself flange 84 with sealing lip.Be also pointed out that the anti-rotation device of expressing cross bar 73/74 form that in Figure 12, to find out among Figure 14.

Figure 15 illustrates another enforcement pattern of plastic nut 86, it is equivalent to the plastic nut 1 of Fig. 5 in principle.Plastic nut 86 has flange portion 87 and nut portion 88, and these two-part interconnect by elastic strip 89/90.Flange portion 87 enters into flange 91, and at this moment, this flange is different from flange embodiment illustrated in fig. 5, is furnished with stop pin 93,94 at it in the face of a side of parts 92.The mode that plastic nut 86 is installed on the parts 92 is identical with situation embodiment illustrated in fig. 1, and wherein chucking hook 95,96 correspondingly retreats, and last in the fastening of the behind of parts 92.In addition, stop pin 93,94 is also simultaneously in the fastening of the behind of parts 92.The meaning that plastic nut 86 is contained in these the additional safty device on the parts 92 is, utilizes chucking hook 95,96 and combining that elastic strip 89,90 acts on, and can overlap certain limit, for example 1 member 92 to 5mm thickness.This means that when plastic nut 86 being installed to one only during the parts 92 of the thickness of 0.5mm, plastic nut 86 may be installed more laxly, this is undesirable in many applications.Even so, after must installing to plastic nut 86 structural designs on such thin plate, can not vibrate, latching projection 93 and 94 have been designed in advance, this latching projection is designed to the behind that elasticity is installed in parts 92 that approach especially, and flange portion 87 is fixed on the parts 92, do not make and can vibrate.

Plastic nut 86 shown in Figure 15 also is included in the screw thread 98 that processes in the narrow 97, and this is to design in advance for placing one piece of screw with respective threaded.Certainly, on all above-mentioned plastic nuts, can design such screw thread in advance.

On the embodiment shown in Fig. 1 to 3, nut portion 36 loosely remains in the flange portion 31, makes and can move vertically.It is being stoped by block along the direction of leaving chucking hook 34/35, is similar to situation shown in Figure 5 (label 20/22,21/23), but can skids off along the direction to flange 34/35.In order to prevent this situation, also can be in the additional interior latching projection of design in advance on the embodiment shown in Fig. 1 to 3 (as using shown in the label 80 and 81 among Figure 13).

On the embodiment shown in the 16d, relate to a kind of plastic nut 101 at Figure 16 a, wherein chucking hook 105 and 106 when screwing in one piece of screw by fastening (seeing the screw 27 among Fig. 8 of patent application 19639396).The plastic nut of Fig. 5 a that plastic nut 101 is equivalent to patent application 19639396 to a great extent in the d, in this application for patent, the chucking hook 5 and 6 of plastic nut 1 shows as and is in its relaxed state, radially outwards opens, and is positioned at the behind of parts (not shown go out).In contrast, Figure 16 a is the positions that are in a kind of mutual inclination to the chucking hook 105 and 106 that is in the plastic nut 101 under the relaxed state shown in the 16d, in Figure 16 a reveal significantly especially.About other member and the function thereof of plastic nut 101, can be referring to the explanation of above-mentioned Fig. 5 a to 5d.For the ease of understanding, Fig. 5 a is extended for numeral " 100 " to the label among the 5d.

Plastic nut 101 can insert under the relaxed state shown in Figure 16 a in the manhole, as shown in Figure 11 of patent application 19639396 (added recess 71 and 72 among this figure, this two recess can be cancelled under situation about using together with plastic nut 101).In case (see the through hole 26 on the plate-shaped member 25 among Fig. 8 of patent application 19639396) after plastic nut 101 inserts a through hole, can be screwed into one piece of screw (screw 27 among Fig. 8) in the narrow 112 of through hole 111 and nut portion 104, at this moment, two chucking hooks 105 and 106 are outwards pushed, be against parts and be positioned with its supporting surface 107 and 108 of two, and fastening.

This combination of plastic nut, plate-shaped member and screw therefore can be referring to Fig. 8 and relevant explanation to the working principle of plastic nut shown in the 16d 101 about Figure 16 a shown in described Fig. 8.In all cases, the effect that one piece of screw is screwed into plastic nut 101 fully makes plastic nut 101 be on the position corresponding to relevant part among Fig. 8 together with its chucking hook 105 and 106.

The structural design of plastic nut 101 makes it in fact contactlessly insert the through hole of parts, and this is favourable, is to have more superiority under the situation about making with sensitive material at the edge of parts through hole especially.For example when the plastic nut 101 of suitable size is used on the light structure member, when for example being used on the cabin liner of current popular, that's how things stand.

Figure 17 a to 17d, 18a to 18c and 19a all relate to plastic nut 201 to the embodiment shown in the 19d, this plastic nut is based on chucking hook and connects with respect to the torsional elasticity of flange portion and remain on the plate-shaped member.

The design of plastic nut 201 is consistent with Fig. 5 a of patent application 19639396 to plastic nut shown in the d equally to a great extent, therefore the relevant declaratives that can quote referring to this specification.For the ease of understanding, Fig. 5 a to 5d, Fig. 6 a to 6c and 7a be extended for numeral " 200 " to the label among the 7c.Be different from described Fig. 5 a to the plastic nut shown in the 5d 1, chucking hook 205 and 205 enters into nut portion 204 and flange portion 202 thereof rigidly, in other words, opposite with chucking hook 5 and 6 the situation of above-mentioned Fig. 5 a in the 5d, chucking hook 205 and 206 can not be pressed together.To this, the structure from Figure 19 a to the nut portion shown in the 19c 204 can find out that this design is to copy Fig. 7 a of patent application 19639396 to 7c to a great extent, therefore can with reference in the above-mentioned patent specification to the declaratives of this figure.Fig. 7 a is in 7c, and slit 17 and 18 has caused that chucking hook 5 separates with nut portion 4 with 6 in its scope.Be different from this design of Fig. 7 a to 7c, Figure 19 a does not have such slit in the design of 19c, and this can see clearly in Figure 19 c especially.Shown in, therefore, merge nut portion 204 and suspension chucking hook 205 and 206 thereon, can obtain a parts compactness, that have the rigid construction pattern.

In the structural design of plastic nut 201, the elasticity of two elastic strips 213 and 214 (supporting structure that nut portion 204 and flange portion 202 are coupled together) is fully used, promptly two elastic strips 213 and 214 form torsional elasticity and are connected between nut portion 204 and flange portion 202, and and then extend to chucking hook 205 and 206.

In order to make full use of with maintained flange portion 202 of rotating elastic type and chucking hook 205,206, Figure 18 a to the plastic nut shown in the 18c on flange portion 202, in chucking hook 205 and 206 passes the scope of flange portion, be provided with the recess 204 that circumferentially extends, this recess enters into window 224 (corresponding window 24 especially can be clear that at Fig. 5 of patent application 19639396 c and 6b).Window 224 along the result that circumference expands in recess 240 scopes is, under making full use of with 213 and 214 elasticity situation, the chucking hook 205 and 206 that makes nut portion 204 uphold out together with rigidity from this nut portion can rotate with respect to flange portion 202, specifically, the rotated position of promptly representing with solid line from Figure 17 c is to the position that dots.In fact about 45 ° have been rotated.

In addition, recess 240 also can be found out to 18c from Figure 18 a of expression flange portion 202 related flanges 203.Figure 18 a to 18c be hold continued patent application 19639396 Figure 16 a to 16c, can be referring to the relevant explanation in this patent specification.

In order to insert plate-shaped member 369 shown in Figure 20 to Figure 17 a to the plastic nut shown in the 17d, parts 369 have the rectangular through-hole 370 that has recess 371,372.On the tetragonal moulding of through hole 370 and two are connected to cross bar 273 and 274 basis on the flange portion 202, formed an anti-rotation device.

On the plastic nut 201 in being inserted into parts 369 in the above described manner, nut portion can turn to two chucking hooks 205,206 are entered in the scope of recess 371,372, therefore, plastic nut 201 can pass completely through parts 369 together with chucking hook 205 and 206, arrive the back side (seeing Fig. 8 of patent application 19639396) of parts 369 up to chucking hook 205 and 206, and utilize the torsional elasticity of elastic strip 213,214 to be inverted to it till the normal position shown in Figure 17 c.In this normal position, chucking hook 205 and 206 is positioned at the behind of parts 369, and this parts one side is kept by flange 203, and another side is kept by chucking hook 205,206.

Shown the plastic nut 210 that is inserted in the parts 369 with schematic representation in Figure 20, this plastic nut is in locks the position, and the chucking hook 205 and 206 of this moment is positioned at the parts back side.

Should also be noted that and can replace rectangular through-hole 370 among Figure 20 with circular port, this circular port must be established a recess certainly, will mix the anti-rotation device of a correspondence on the plastic nut in this depression.

Claims (20)

1. insert the plastic nut (1,30,47,50,77,82,86) in the through hole (26) of a plate-shaped member (25,69,92), it is made up of standing part, one of them standing part be designed to can be from the attachment face pressing to parts the flange on (25,69,92) (3,84,91), another is designed to and can gets on and at the chucking hook (5,6 of parts (25,69,92) back side fastening from the opposite pressing; 34,35), simultaneously, be furnished with one on the standing part and be provided with and place hole (11,12; 41,42; 61,62) nut portion (4,36,52,88) to place one piece of screw (27), flange (3,84,91) is the constituent element of a flange portion round nut portion (4,36,52,88) (2,31,51,83,87), nut portion (4,36,52,88) can push along flange (3,84,91) direction, it is characterized in that, by the elastic support structure (13,14 that constitutes an elastic region; 39,40; 48,49; 53,54; 89,90), can make with respect to the axially movable nut portion of flange portion (4,36,52,88) by direction pushing along flange portion (2,31,51,83,87), and after plastic nut (1,30,47,50,77,82,86) is inserted into, the elastic region just makes nut portion (4,36,52,88) and flange portion (2,31,51,83,87) abut parts (25,69,92) to get on, but the different-thickness of compensating unit (25,69,92).

2. according to the plastic nut of claim 1, it is characterized in that flange portion (2,31,51,83,87) guiding nut part (4,36,52,88) can not be rotated it.

3. according to the plastic nut of claim 1 or 2, it is characterized in that flange (3) is designed to tabular, nut portion (4) is furnished with chucking hook (5,6) (Fig. 5 a is to 5d).

4. according to the plastic nut of claim 1 or 2, it is characterized in that flange is divided into all quadrants (32,33), each quadrant is respectively joined a chucking hook (34,35) (Fig. 1 a is to 1d).

5. according to the plastic nut of claim 4, it is characterized in that nut portion (4) also is furnished with chucking hook (5,6) (Fig. 9).

6. according to each plastic nut in the claim 1 to 5, it is characterized in that flange portion (2,31,51,83,87) resembles the sleeve round nut portion (4,36,52,88).

7. according to each plastic nut in the claim 1 to 6, it is characterized in that flange portion (2) and nut portion (4) are furnished with the block (20,21 of restrictive axial motion; 22,23) (Fig. 5).

8. according to each plastic nut in the claim 1 to 7, it is characterized in that nut portion (4) and flange portion (2) are linked to be an integral body mutually through the plastic tape that constitutes elastic support structure (13,14,48,49,89,90).

9. according to each plastic nut in the claim 1 to 7, it is characterized in that nut portion (52) is by a blocking device (55,56 with engaging of flange portion (51); 78,79; 80,81) keep together this blocking device when nut portion (52) enters flange portion (51), work (Figure 13).

10. according to the plastic nut of claim 9, it is characterized in that blocking device (55,56,57,58,59,60) comprises elastic support structure (53,54) (Figure 10 a, 10b; Figure 13).

11., it is characterized in that flange is furnished with rotation inhibiting safty device (65,66 that penetrate through hole in the side in the face of nut portion according to each plastic nut in the claim 1 to 10; 73,74) (Figure 10 a, b; Figure 12).

12., it is characterized in that flange (84) is provided with a seal area (85) (Figure 14) according to each plastic nut in the claim 1 to 11.

13. according to each plastic nut in the claim 1 to 12, it is characterized in that, form a channel region (11) in the hole that places, and have narrow (12) (Fig. 5 a is to 5d) in abutting connection with this channel region in the face of the nut portion (4) of flange (3) one sides.

14. the plastic nut according to claim 13 is characterized in that, narrow (12,42) has the diameter of the screw that can be screwed into one piece of Thread Forming TF.

15. the plastic nut according to claim 13 is characterized in that, narrow (97) has screw thread (98) (Figure 15).

16. the plastic nut according to claim 14 or 15 is characterized in that, places Kong Zaiqi and carries out the transition on the changeover portion of its narrow and to form one or more steps (64) through the skewed slot of screw thread (63) just like (Figure 10 a).

17. according to each plastic nut in the claim 1 to 16, it is characterized in that, flange (91) is provided with locking protrusion (93,94) in its side in the face of parts (92), and this latching projection can be in the back side fastening (Figure 15) of parts (92) away from flange (91) one sides.

18., it is characterized in that flange portion (2,31,51,83,87) utilization allows the gap guiding nut part (4,36,52,88) that radially moves mutually according to each plastic nut in the claim 1 to 17.

19. according to each plastic nut in the claim 1 to 18, it is characterized in that, all chucking hooks (105/106) are connected with nut portion (104) elasticity, make chucking hook when inserting, can freely pass through through hole (26) basically, and can one piece of screw (27) is outside to be pushed with its fastening by being screwed into.

20. according to each plastic nut in the claim 1 to 18, it is characterized in that, chucking hook (205,206) rigidity enters into nut portion (204), nut portion (204) is connected with flange portion (202) through an elastic support structure (213,214), this elastic support structure can maintain with respect to flange portion (202) the related chucking hook of nut portion (204) (205,206) again along the direction pushing nut portion (204) of flange portion (202) with the rotation elastic type.

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