Source: https://patents.google.com/patent/US6945829B2/en
Timestamp: 2018-05-25 17:13:50
Document Index: 634675175

Matched Legal Cases: ['art 600', 'art 500', 'art 600', 'art 600', 'art 700', 'art 800']

US6945829B2 - Self-locking screw connection - Google Patents
Self-locking screw connection Download PDF
US6945829B2
US6945829B2 US10797372 US79737204A US6945829B2 US 6945829 B2 US6945829 B2 US 6945829B2 US 10797372 US10797372 US 10797372 US 79737204 A US79737204 A US 79737204A US 6945829 B2 US6945829 B2 US 6945829B2
US10797372
US20040171317A1 (en )
Deutsch GmbH Cie
FIGS. 3 and 4 show that radially inwardly directed openings or slots 165 are arranged in the walls of the terminal receiving cavities 160 between the transverse wall 170 and the shoulder 163. FIG. 4, in particular, shows that the openings 165 extend over an angle of almost 90° relative to the central axis of the terminal receiving cavities 160. The openings 165 provide a shoulder 173 that is provided adjacent to the shoulder 163 within the space between the terminal receiving cavities 160. In other words, the shoulders 163 and 173 are located at the same point along the longitudinal axis, namely in the approximate center of the threaded section 130.
The insertion body of the secondary locking element 180 comprises a click-stop section 184 that adjoins the disk-shaped blocking flange 182. The click-stop section 184 comprises eight longitudinal depressions 186 that are respectively offset relative to one another by 45° and are formed on the circumference of said click-stop section. These longitudinal depressions extend parallel to the longitudinal axis of the insertion body and approximately have a hollow profile in the shape of a circular arc. A longitudinal hump 187 that is slightly curved outwardly is respectively formed between each one of the longitudinal depressions 186. This means that the click-stop section 184 has, if viewed in cross section, a slightly undulated profile with eight depressions that correspond to the longitudinal depressions 186 and eight elevations that correspond to the longitudinal humps 187 (FIG. 7).
A further section that, if viewed in cross section, has a cruciform profile located adjacent to the click-stop section 184. The cruciform profile is achieved due to the fact that, with the exception of a cylindrical core that has a smaller diameter than the average diameter of the click-stop section 184, only the material of every second longitudinal depression 186 is preserved in the form of four longitudinal ribs that are circumferentially offset relative to one another by 90°. On the end that faces away from the click-stop section 184, a locking knob or lug 188 that protrudes radially outwardly is integrally formed on each longitudinal rib. In addition, a central guide opening 189 is provided in the secondary locking element 180 on the end that is provided with the locking knobs 188. A resilient tongue 190 is integrally formed in a recess 191 between two adjacent longitudinal ribs, wherein said tongue extends in the longitudinal direction of the secondary locking element 180, namely from the click-stop section 184 into the recess 191, in a cantilevered manner (FIG. 9). The tongue comprises a holding hook 192 that extends radially outwardly on its free end. A central opening 194 that has the shape of a slot and serves for inserting a not-shown tool is provided at the end of the profiled insertion body on the blocking flange side.
During the initial phase of this inserting process, the guide pin 172 on the transverse wall 170 of the pin housing 100 engages into the guide opening 189 of the secondary locking element 180. Due to the outside contour of the terminal receiving cavities 160 and the outside contour of the profiled insertion body of the secondary locking element 180, the initial insertion of the secondary locking element 180 is only possible in an angular position in which the locking knobs 188 are rotated by 45° relative to the central longitudinal axes of the terminal receiving cavities 160 about the common longitudinal axis of the pin housing 100 and the secondary locking element 180. This means that the locking knobs 188 are respectively arranged between two adjacent terminal receiving cavities 160 while the angular position of the holding hook 192 is aligned with one of the terminal receiving cavities 160 such that the holding hook is able to engage or grip behind the shoulder 173. FIG. 10 also shows that, in the initially inserted state, the guiding rib 185 of the secondary locking element 180 is offset by 45° relative to the guiding rib 115 in the direction of the guiding rib 113 which is, as well as guiding rib 115, integrally formed onto the pin housing.
The disk-shaped blocking flange 182, the bridge-shaped web 181 and the section 183 in the form of an arc segment have such dimensions that, as shown in FIG. 10, in the initial insertion state of the secondary locking element 180 into the pin housing 100, the terminal receiving cavities 160 can be provided with the pin terminals 195 which are locked in the terminal receiving cavities 160 by primary locking means. After the terminal receiving cavities are equipped with the pin terminals as shown in FIG. 10, the secondary locking element 180 is rotated from its initial position into a position in which the guiding rib 185 is aligned with the guiding rib 115 and the locking knobs 188 protrude into the openings 165 of the terminal receiving cavities 160 and grip behind the collars 197 of the pin terminals 195. This is achieved by rotating the secondary locking element by 45° by means of a tool inserted into the actuating opening 194, for example, a screwdriver. FIG. 11 shows this locking position in which the pin terminals 195 are not only retained in the pin housing 100 by means of a primary locking means, but also by a secondary locking effect achieved by means of the secondary locking element 180.
Analogous to the terminal receiving cavities 160, the terminal receiving cavities 260 have an inside contour with two shoulders 261 and 263 that serve for the primary locking of the socket terminals 295. A transverse wall 270 is integrally formed on the outer walls of the terminal receiving cavities 260 and on the inner wall of the socket housing 200 at the level of the installation section 230. The transverse wall 270 carries a longitudinally extending central guide pin 272 that protrudes from the transverse wall 270 in a direction towards the end of the socket housing 200 on the mating side. Radially inwardly directed openings 265 are provided in the walls of the terminal receiving cavities 260 between the transverse wall 270 and the shoulder 263. FIG. 16, in particular, shows that the openings 265 extend over an angle of almost 90° relative to the central axis of the terminal receiving cavities 260. The openings 265 provide a shoulder 273 that is adjacent to the shoulder 263 in the interspace between the terminal receiving cavities 260.
The secondary locking element 280 essentially consists of a cylindrical profiled body or member. FIGS. 18-21, in particular, show that the secondary locking element 280 comprises an essentially cylindrical snap- or click-stop section 284 on which eight longitudinally extending depressions 286 are provided. These longitudinal depressions are respectively separated from one another by a longitudinal hump 287. The eight longitudinal depressions 286 are circumferentially offset relative to one another by 45°.
Three blocking or cover blades 282 that protrude radially outwardly are integrally formed on the upper end of the click-stop or indexing section 284, with said cover blades being circumferentially offset relative to one another by 90°. The blocking or cover blades 282 are respectively aligned with one of the longitudinal depressions 286.
At its end opposite to the cover blades 282, the click-stop section 284 adjoins a section that, if viewed in cross section, has a cruciform profile. The cruciform profile is achieved due to the fact that, with the exception of a cylindrical core that has a smaller diameter than the average diameter of the click-stop section 284, only the material of every second longitudinal depression 286 is preserved in the form of four longitudinal ribs that are offset relative to one another by 90° and offset relative to the cover blades 282 by 45°. At the end of the secondary locking element 280 which is opposite to the locking blades 282, locking knobs 288 that protrude radially outwardly are integrally formed on these longitudinal ribs.
After the terminal receiving cavities 260 are provided with the socket terminals 295, the secondary locking element 280 is rotated about its longitudinal axis by means of a tool inserted into the actuating opening 294, preferably a screwdriver. The secondary locking element 280 is rotated until the outer walls of the terminal receiving cavities 260 engage those walls of the longitudinal depressions 286 that are aligned with the locking knobs 288. In this case, the secondary locking element 280 is rotated in a click-stop action by 45° from a non-locking position into a locking position. In the locking position, the locking knobs 288 protrude through the openings 265 and engage or grip behind the collars 297 of the socket terminals 295.
In the present embodiment, three thread-free chambers 134 are provided in the threaded section 130, wherein said chambers are respectively offset relative to one another by 120°. The self-locking nut 300 comprises eight flexible blade-like sections 320 that are respectively offset relative to one another by 45°. This angular relationship between the blade-like sections 320 and the thread-free chambers 134 ensures that the self-locking nut is locked within 15° increments and is thus secured against unscrewing or loosening. If the thread pitch is 1.5 mm, this means that a graduation in increments of 0.06 mm is achieved in the longitudinal direction of the threaded connection. This allows a flexible mounting if the wall thickness of a mounting plate (not shown) varies.
FIGS. 39 and 40, in particular, show the embodiment of a 90° end cap. The cap consists of two shell-shaped cap parts, namely a lower part 600 and an upper part 500. The lower part 600 has an annular head section 610 and an essentially hollow, semi-cylindrical longitudinal section 630 that is integrally formed on one side of the annular head section 610 and extends perpendicular to the central axis of the annular head section.
The 90° end cap which has been described with reference to FIGS. 39-45 provides the advantage that the lower part 600 can be preinstalled on a connector housing before the connector housing is equipped with the terminals that are already connected to a cable and before the cable is connected to terminals that are already arranged in the connector housing, respectively.
The catch hook and the catch tab are provided in such a manner that this opening represents a clamping channel for a safety pin 590. Due to the slightly conical design of the front end of the pin section 594 of the safety pin 590, the safety pin 590 can be absolutely firmly pressed into the clamping channel. The head 592 of the safety pin 590 is then rigidly and firmly seated above the location to be secured. The firm press fit ensures with absolute certainty that the head 592 of the safety pin 590 shears off from the firmly clamped pin section 594 in case of an attempted manipulation. In this context, we refer, in particular, to FIG. 45 that shows a connected 90° end cap with inserted safety pin. The end cap shown in FIG. 45 is installed on the ring section 150 of the pin housing 100 of the pin connector.
FIG. 48 shows the straight end cap in a state in which the upper part 700 is arranged on and interlocked with the lower part 800. As in the 90° end cap, the free teeth 742 and 842 define an opening between one another when no cable is inserted and said opening has an essentially flat, bi-convex cross section.
The design of the interior of the seven-pole pin housing 1000 differs from that of the four-pole pin housing 100 essentially with respect to the number and the arrangement of the terminal receiving cavities, as well as the coding provisions that are adapted to the seven-pole embodiment. Seven terminal receiving cavities that are arranged parallel to one another extend through the pin housing 1000 in the longitudinal direction. The cavities are provided adjacent to a receiving opening 1110 for receiving a matching plug-in section of a seven-pole socket housing, that is described further below, and extend up to the housing end on the terminal receiving end. The seven terminal receiving cavities consist of an inner terminal receiving chamber 1602, the longitudinal axis of which coincides with the longitudinal axis of the pin housing, and six outer terminal receiving cavities 1600 that circularly surround the inner terminal receiving chamber 1602 and are respectively offset relative to one another by an angle of 60°.
FIGS. 53-55 show that the secondary locking element 1800 consists of an essentially hollow-cylindrical, profiled insertion body, on one end of which an annular blocking flange 1820 is integrally formed. The holding flange 1820 is located in a radial plane that extends perpendicular to the longitudinal axis of the insertion body. Three narrow arms or webs 1810 that extend radially outwardly are integrally formed on the blocking flange 1820 at locations that are offset relative to one another by 120°. A section 1830 in the form of an arc segment is provided adjacent to each web. The webs 1810 and the segment-shaped sections 1830 are located in the same plane as the annular blocking flange 1820. Each of the segment-shaped sections 1830 carries one of the three aforementioned guiding ribs 1850 on the side that faces away from the insertion body and said guiding ribs essentially extend parallel to the longitudinal axis of the profiled insertion body.
The insertion body of the secondary locking element 1800 comprises an essentially hollow-cylindrical indexing or click-stop section 1840 that adjoins the annular blocking flange 1820. Twelve longitudinal depressions 1860 are respectively offset relative to one another by 30° and are arranged on the outer circumference of this click-stop section. The longitudinal depressions 1860 extend parallel to the longitudinal axis of the insertion body and have a hollow profile approximately in the form of a circular arc. Longitudinal humps 1870 that are slightly curved radially outwardly are provided between the longitudinal depressions 1860. Consequently, the click-stop section 1840 has, if viewed in cross section, a slightly undulating outside profile with twelve depressions that correspond to the longitudinal depressions 1860 and twelve elevations that correspond to the longitudinal humps 1870.
A section that, if viewed in cross section, also has a hollow-cylindrical profile located adjacent to the click-stop section 1840. This hollow-cylindrical section has an outside diameter that is slightly smaller than the average diameter of the click-stop section 1840 and carries six locking knobs 1880 that protrude radially outwardly and are provided at the section end that faces away from the click-stop section 1840. The integral locking knobs 1880 are angularly aligned with every second longitudinal depression 1860 and are consequently offset relative to one another by 60°.
The angular inserting position is reached when the longitudinal slot 1654 of the inner terminal receiving chamber 1602 is angularly aligned with the locking knob 1882 on the resilient tongue 1862 of the secondary locking element 1800 such that the locking knob 1882 can enter the opening 1652 through the longitudinal slot 1654. In this angular inserting position, the locking knobs 1880 are angularly displaced by 30° relative to the central longitudinal axes of the terminal receiving cavities 1600. This means that the locking knobs 1880 are respectively located between two adjacent terminal receiving cavities 1600, while the locking knob 1882 is angularly aligned with one of the outer terminal receiving cavities 1600.
In the initial inserting position, the guiding ribs 1850 that are integrally formed onto the secondary locking element 1800 are angularly displaced by 30° relative to the guiding ribs 1150 integrally formed on the pin housing 1000. Consequently, a connection with a socket housing cannot be effected in the initial inserting position as described above with reference to the four-pole pin housing 100.
The annular blocking flange 1820, the bridge-shaped webs 1810 and the section 1830 of the secondary locking element 1800 which has the shape of an arc segment have such dimensions that the pin terminals can be inserted into the terminal receiving cavities 1600 and 1602 and retained therein by means of primary locking. After the contacts or terminals are installed, the secondary locking element 1800 is rotated by 30° from the initial inserting position into a position in which the guiding ribs 1850 are aligned with the guiding ribs 1150 and the locking knobs 1880 enter the openings 1650 of the outer terminal receiving cavities 1600 and engage or grip behind the collars provided on the pin terminals.
As in the four-pole plug-type connector, the secondary locking element 1800 is rotated from the initial inserting position or non-locking position into the locking position that is offset relative to the non-locking position by 30° by exerting a force with the aid of the tool inserted into the blocking flange 1820. The exerted force overcomes the contact pressure of the longitudinal humps 1870 which are curved radially outwardly and are arranged between the longitudinal depressions 1860. Analogous to the four-pole connector, the secondary locking element 1800 snaps from the non-locking position into the locking position when it is rotated due to a slight elastic deformation and is held in a precisely defined angular position. The bridge-like webs 1810 which are located in the region of the pin terminals protruding from the terminal receiving cavities 1600 have such dimensions that they do not impair the forced click-stop rotation of the secondary locking element 1800.
Analogous to the secondary locking element 1800 of the pin housing, the secondary locking element 2800 of the socket comprises a hollow-cylindrical, profiled insertion body. The insertion body of the secondary locking element 2800 has a click-stop section 2840 that corresponds to the click-stop section 1840 of the secondary locking element 1800. On the outer circumference of the section 2840, twelve longitudinal depressions 2860 that extend in the direction of the longitudinal axis of the secondary locking element 2800 are provided, wherein said longitudinal depressions are respectively separated from one another by a longitudinal hump 2870. The twelve longitudinal depressions 2860 are circumferentially offset relative to one another by 30°.
Three cover blades 2820 that protrude radially outwardly are integrally formed on the free end of the click-stop section 2840, with said cover blades being circumferentially offset relative to one another by 120°. The cover blades 2820 are respectively aligned with one of the longitudinal depressions 2860.
As with the pin housing 1000, the terminal receiving cavities 2600 and 2602 can, in the initial inserting position or non-locking position, be provided with socket terminals from the end of the socket housing 2000 on the terminal receiving end. After the terminal receiving cavities 2600 and 2602 have been provided with the socket terminals, the secondary locking element 2800 is rotated about its longitudinal axis by 30°, namely from the non-locking position into the locking position, and by means of an inserted tool. This is effected in exactly the same manner as with the secondary locking element 1800 of the pin housing. The cover blades 2820 are designed in such a manner that, in the locking position, they expose the sockets of the socket terminals inserted into the terminal receiving cavities and the pin terminals of the pin connector can be inserted.
The self-locking nut 300, the coupling ring 400, the 90° end cap 500, 600 and the straight end cap 700, 800 including the safety pins 490 and 590 may be analogously used in the described seven-pole connector.
US10797372 2001-08-27 2004-03-10 Self-locking screw connection Expired - Fee Related US6945829B2 (en)
DE2001214103 DE20114103U1 (en) 2001-08-27 2001-08-27 Electrical connector for motor vehicle, has insertion chamber defined by walls of terminal receiving cavities in housing, for receiving locking element from mating end of housing
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US10797372 US6945829B2 (en) 2001-08-27 2004-03-10 Self-locking screw connection
US10228118 Division US6764351B2 (en) 2001-08-27 2002-08-26 Electrical connector
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