US3796985A - Locking device - Google Patents

Locking device Download PDF

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Publication number
US3796985A
US3796985A US00234150A US3796985DA US3796985A US 3796985 A US3796985 A US 3796985A US 00234150 A US00234150 A US 00234150A US 3796985D A US3796985D A US 3796985DA US 3796985 A US3796985 A US 3796985A
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US
United States
Prior art keywords
control grip
spindle
hook
plug
internally threaded
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00234150A
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English (en)
Inventor
E Weber
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Individual
Original Assignee
Individual
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Filing date
Publication date
Priority claimed from DE19712162192 external-priority patent/DE2162192C3/de
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3796985A publication Critical patent/US3796985A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/14—Mounting supporting structure in casing or on frame or rack
    • H05K7/1401—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means
    • H05K7/1411—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means for securing or extracting box-type drawers
    • H05K7/1412—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means for securing or extracting box-type drawers hold down mechanisms, e.g. avionic racks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/621—Bolt, set screw or screw clamp
    • H01R13/6215—Bolt, set screw or screw clamp using one or more bolts

Definitions

  • the invention relates to a locking device for a connection between inserted members, especially electric plug connections, and a mounting device that can be used with such inserted members, this mounting device having a pair of matched members, with an axis of rotation located on the frame, with a spindle whose one end is rotatable around the axis of rotation, with a hook, pointing forward, at the point of insertion, with a control grip on the spindle, moving back and forth on the spindle, in dependence on the direction of rotation, and with a tapered ring that is positioned coaxial with its inner diameter around the threaded spindle, which has an inner taper opening toward the axis of rotation, which can be made to engage with the hook, which can be pressed onto the hook by rotating the control grip in the direction for tightening and can be released from the hook by rotating the control grip in the direction for loosening, provided the control grip is loosened sufficiently, the control grip being form-locked and force-- locked to an inner
  • the unidirectional locking joint requires the use of a larger. number of parts. Since the entire locking device is rather small, having for example a maximum outer diameter of 26 mm, the parts of the locking joint must themselves be kept small. If it is assumed that the locking on takes place when the inserting force is on the order of 50-150 kp and the forces required for loosening the device are on the same order, then it is easy to see that the only parts capable'of sustaining such stresses are those made of veryhigh quality materials and subject to narrow toleration limits.
  • the object of the invention is to provide a locking joint made of substantially less parts while substantially improved in its capability of withstanding the stresses that arise, and which in particular possesses a lower compressive stress per unit area.
  • control grip and the inner thread possess I-Iirth-type serrations on their opposing surfaces.
  • FIG. 1 shows a longitudinal section of the device in its locked position.
  • FIG. 2. shows an unsectioned view corresponding to FIG. 1, but shortly after the inserted element has become slightly loosened but not completely disengaged.
  • FIG. 3 shows a front view of the catch.
  • FIG. 4 shows a longitudinal section of the interior of the threaded portion.
  • FIG. 5 shows a view corresponding to that of the arrow A in FIG. 4.
  • FIG. 6 shows an enlarged view from the standpoint indicated by the arrow B of FIG. 4, projected onto a flat surface.
  • a frame 31 is anchored to a particular spot and has a pair of plug-in elements in its rear area.
  • An eye 33 with a transverse hole 34 is provided beneath the bottom 32 of the frame and in front of it.
  • the front of the plug that is to be supported inside the frame 31 grips a frame 36, to which a front panel 37 is fastened.
  • a hook 38 is rigidly fastened, whose projection 39 runs more or less horizontal and whose lower edge is more or less in line with the lower edge of the front panel 37.
  • the inserted element is capable of sliding over the floor 32, and in its rear area bears the usual plug element that is to be joined to the plug element of the frame 31.
  • a secure fastening is insured if the plug elements are pressed together with a given amount of force. If the force is insufficient, the plug elements will not properly unite, and if the force applied is too great, then damage will result.
  • a cross pin 41 becomes seated in the transverse hole 34, this pin also lying in a direction transverse to a square socket 42 of a threaded bolt 43.
  • the threaded bolt 43 is capable of rotating around the longitudinal axis of the cross pin 41, but cannot turn around its own longitudinal axis.
  • the right half 44 of the threaded bolt 43 is smooth, while its left half has a a thread 46 that cannot be reached from outside, due to-the presence of a locking washer 47.
  • Theunderside of the right portion 44 bears a traction groove 48, which stops just short of the thread 46.
  • a jacket 49 has an inner diameter slightly larger that the outer diameter of the threaded bolt 43, so that it can be pushed back and forth along it.
  • an outer flange 51 which defines a front surface 52 on the left and an encircling shoulder on the right.
  • an inner thread 54 lined up with the traction groove 48, is cut into the wall and is traversed by the shaft of'a screw 56, the free end of which protrudes slightly into the traction groove 48 and.
  • the jacket 49 also has a longitudinal guide rail that permits an axial motion but not rotatio
  • a catch plate 57 has the profile shown in the figures. The hole 58 drilled through it matches exactly the right end of the jacket 49. Its inner thread 59 is traversed by the shaft of the screw 56, and the catch plate 57 is in this way fastened securely to the jacket 49. As can be seen from FIG. 1, when the threaded bolt 43 is pulled out, it swings outward to about 8 from the horizontal.
  • the catch plate 57 has a flat, linear chamfer 6.1 of 8 along its upper end, so that when the:plug is pulled out the catch plate 57 is allowed to lie flat, with a large contact surface, behind the lower trailing edge of the front panel 37.
  • two guide pins 62 are screwed in on the'right and on the left. These serve to maintain a distancc between a tapered ring 63 and the catch plate 57, since these correspond to the thickness of the front panel 37 and the hook-38.
  • This tapered ring 63 is rotationally symmetrical and has a central hole 64, which is a scant one-tenth of a milimeter larger than the outer diameter of the jacket 49. Since the central hole 64 can have only one particular length, the tapered ring 63 can turn in a helical path around the jacket 49, as long as it is subjected to a load. At such a point the guide pin 62 forms an obstruction.
  • a spacer ring 72 is rotationally symmetric in form, and its center hole 73 is capable of moving axially or of rotating on the jacket 49. Its cross section is that of the letter Z.
  • the right front face 74 of its inner flank is of the same size as the inner face 68 of the tapered ring 63.
  • the left face 76 is capable of making contact with the outer flange 51 of the jacket 49.
  • the encircling shoulder 77 corresponds in its diameter to that of the encircling shoulder 69. Both of these serve to anchor the ends of a helical pressure spring 78.
  • the outer left face 79 serves as a stop for a set of cup springs 81, whose outer diameter is somewhat smaller than the outer diameter of the spacer ring 72 and whose inner diameter allows it to pass freely over the outer flange 51.
  • the outer right face 82 serves as a stop for the inner face 83 of a coaxial compression ring 84.
  • the inner diameter of this ring is larger than the outer diameter of the helical spring 78, so that the helical spring 78 can be moved out of the compression ring 84 under certain operational conditions.
  • the right face of the compression ring 84 is able to make contact with the outer face 71 of the tapered ring 63 at the point when the locking operation is nearly complete.
  • the compression ring 84 is part of the inner threaded portion 86, shown in detail in FIGS. 4 and 5.
  • the internally threaded device 86 can be divided for the sake of description into a hubcomponent 87 and a cup component 88. Both the set of cup springs 81 and the spacer ring 72 fit into its circular-cylindrical inner chamber 89. The inner chamber 89 is partially sealed off the outside by the compression ring 84, for the seating of which a recess is provided.
  • the inner surface of the floor 92 forms the other abutment against which the cup springs act, while Hirth-type serrations 93 are provided on the outer surface, extending as far as the hub component 87, whose teeth have a vertical flank 94, about 1 mm high, a small horizontal head 96, and an obligue flank 97.
  • a coaxial recess 98 has been provided, which extends into the hub component 87 and serves partly as a bearing and partly as a guide for a helical spring 99, which is coaxial with the threaded bolt 43 and can be displaced along it.
  • the helical spring 99 presses against the outer flange 51 and forces the jacket 49 in the direction of the transverse hole 34.
  • the catch plate 57 is thus held clear of the front panel 37. But when the jacket 49 is pulled to the left by loosening the spacer ring 72, then the helical spring 99 is compressed for a short distance, after which 57 encounters the chamfer 61 behind the front panel 37.
  • An inner thread 101 is provided for the hub component, which works in conjunction with the thread 46.
  • An outer thread 103 lies to the left of a smooth cylindrical perimeter 102.
  • a handle 104 which is in other respects rotationally symmetrical, has a central hole 106, whose diameter is larger than the cylinder perimeter 102. Its outer diameter is approximately 26 mm.'A series of Hirth-type serrations 107 are located on its right frontface, these being complimentary to the serrations 93 and working in conjunction with them. To improve the gripping properties of the handle 104, its exterior is knurled. Opening to the left, it possesses a recess 108 with a larger diameter and a recess 109 with a smaller diameter. The latter accommodates a spring cushion 111, which is first knitted with thin metal fibers in the form of a stocking, corrugated, rolled up, and then pressed into the shape shown in the drawing.
  • the left front side of the spring cushion 111 is provided with a washer 1 12. This is interposed between the spring cushion 111 and a nut 113, which is screwed onto the outer thread 103 and is seated inside the recess 108. When the nut 113 is turned further into the recess 108, then the spring cushion 111 is pressed more tightly together, and the latter thus presses the Hirth serrations 107 more tightly against the serrations 93. Since the spring cushion 111 has strongly reproducible properties, it is possible to use this to adjust to the point when the Hirth serrations 93 and 107 will be overlocked.
  • the handle 104 due to its manner of construction, already described, can be displaced to the left when the locking process begins, i.e., when the flanks 97 slide together, one on top of the other. If the flank 94 has a height of 1 mm, then it is possible to adjust this so that the spring cushion 111 exerts a pressure of kp, to give an example.
  • the device operates as follows: The tapered ring 63 is suspended over the hook projection 39.
  • the outer front face 71 is located at a considerable distance from the compression ring 84, which remains free of tension throughout the length of the helical spring 78.
  • the handle 104 is then turned to the right, which pulls the internally threaded device 86 in the same direction.
  • the interval between the front faces 74 and 68 grows smaller and smaller until they come in contact with each other. From this point on, the spacer ring 72 presses to the left, and the set of cup springs 81 is compressed. This process continues as long as the compression ring 84 pushes against the outer face 71. Very clearly, the tapered ring 63 contributes to these rotations.
  • the front panel 37 is inserted more deeply into the frame 31, and with it the plug inset element.
  • the handle 104 is further rotated, when a certain force is exceeded it causes an overlooking of the Hirth serrations 93 and 107, and the handle 104 no longer pulls on the internally threaded device 86.
  • the handle 104 is rotated in the opposite direction and the flank 94 of the Hirth serrations 93 and 107 make contact with each other.
  • the front panel 37 begins a tightening motion when the face 82 is opposite the face 83 and when the encircling shoulder 53 is in contact with the face 76. Further rotation causes the jacket 49 to be pulled to the left, and the plug insert is pulled out, together with the catch plate 57.
  • the tapered ring 73 remains on the hub projection 39, so that the entire device does not swing downward, the consequence of which would be that the I a hook attached to one plug-insert element,
  • a locking device in which the spring-loading device is a donut-shaped spring cushion made from worked and forged metal wires, the spring cushion being supported and the Hirth-type serrations being subjected to pressure by means of the internally threaded member and the control grip;

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Dowels (AREA)
US00234150A 1971-12-15 1972-03-13 Locking device Expired - Lifetime US3796985A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712162192 DE2162192C3 (de) 1971-12-15 Verriegelungseinrichtung

Publications (1)

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US3796985A true US3796985A (en) 1974-03-12

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ID=5828052

Family Applications (1)

Application Number Title Priority Date Filing Date
US00234150A Expired - Lifetime US3796985A (en) 1971-12-15 1972-03-13 Locking device

Country Status (4)

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US (1) US3796985A (it)
FR (1) FR2163415B1 (it)
GB (1) GB1339102A (it)
IT (1) IT947934B (it)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4018091A (en) * 1973-05-14 1977-04-19 Hollingsead-Pryor Enterprises, Inc. Pivotable extractor hold down apparatus
US4534234A (en) * 1981-07-28 1985-08-13 Rexnord Inc. Fastener of the hold-down type
US4718632A (en) * 1986-08-14 1988-01-12 Rexnord Inc. Hold-down type mechanism
DE3829030A1 (de) * 1987-09-08 1989-03-16 Rexnord Inc Verstellbare riegelvorrichtung
DE3831807A1 (de) * 1988-01-22 1989-08-03 Rexnord Inc Niederhaltevorrichtung
US4882655A (en) * 1987-04-22 1989-11-21 Societe Anonyme Dite: Vibrachoc Device for locking an electronic equipment housing on a tray
USRE33283E (en) * 1973-05-14 1990-07-31 Hollingsead International, Inc. Pivotable extractor hold down apparatus
US5002418A (en) * 1988-12-09 1991-03-26 Vsi Corporation Hold down device with extended capture pawl mechanism
US5041004A (en) * 1990-02-13 1991-08-20 Cooper Power Systems, Inc. Electrical connector with means for limiting the torque applied during threaded engagement
US5505556A (en) * 1994-09-09 1996-04-09 Western Atlas, Inc. Clamping mechanism
US6056581A (en) * 1995-11-14 2000-05-02 The Whitaker Corporation Latch detent/stop mechanism for electrical connectors
US20110233372A1 (en) * 2010-03-29 2011-09-29 Rodig Nicholas P Hold-down assembly
CN101709734B (zh) * 2009-12-22 2012-05-23 中国航空工业集团公司第六三一研究所 C型锁紧拔插装置
CN104507291A (zh) * 2014-12-16 2015-04-08 中航光电科技股份有限公司 用于机柜的助拔式机箱托架装置
US20170181308A1 (en) * 2015-12-16 2017-06-22 Tyco Electronics Corporation Electronic unit hold down assembly
US9816311B2 (en) * 2015-07-17 2017-11-14 Eutimio Reyes Portable barrier for a door sill
US10739833B2 (en) * 2018-06-04 2020-08-11 Cooler Master Co., Ltd. Fluid connector assembly

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE32551E (en) * 1980-09-22 1987-12-01 Brinly-Hardy Co., Inc. Pushed dethatching unit
IL66290A (en) * 1981-07-28 1985-12-31 Rexnord Inc Swing fastening device particularly for securing electronic units
EP0105609B1 (en) * 1982-09-03 1989-03-01 Barry Wright Corporation Apparatus for securing an electronic unit to an avionics tray

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4018091A (en) * 1973-05-14 1977-04-19 Hollingsead-Pryor Enterprises, Inc. Pivotable extractor hold down apparatus
USRE33283E (en) * 1973-05-14 1990-07-31 Hollingsead International, Inc. Pivotable extractor hold down apparatus
US4534234A (en) * 1981-07-28 1985-08-13 Rexnord Inc. Fastener of the hold-down type
US4718632A (en) * 1986-08-14 1988-01-12 Rexnord Inc. Hold-down type mechanism
US4882655A (en) * 1987-04-22 1989-11-21 Societe Anonyme Dite: Vibrachoc Device for locking an electronic equipment housing on a tray
DE3829030A1 (de) * 1987-09-08 1989-03-16 Rexnord Inc Verstellbare riegelvorrichtung
DE3831807A1 (de) * 1988-01-22 1989-08-03 Rexnord Inc Niederhaltevorrichtung
GB2214562A (en) * 1988-01-22 1989-09-06 Rexnord Inc Hold-down device
GB2214562B (en) * 1988-01-22 1991-07-24 Rexnord Inc Hold-down device
US5002418A (en) * 1988-12-09 1991-03-26 Vsi Corporation Hold down device with extended capture pawl mechanism
US5041004A (en) * 1990-02-13 1991-08-20 Cooper Power Systems, Inc. Electrical connector with means for limiting the torque applied during threaded engagement
US5505556A (en) * 1994-09-09 1996-04-09 Western Atlas, Inc. Clamping mechanism
US6056581A (en) * 1995-11-14 2000-05-02 The Whitaker Corporation Latch detent/stop mechanism for electrical connectors
CN101709734B (zh) * 2009-12-22 2012-05-23 中国航空工业集团公司第六三一研究所 C型锁紧拔插装置
US20110233372A1 (en) * 2010-03-29 2011-09-29 Rodig Nicholas P Hold-down assembly
US8870149B2 (en) * 2010-03-29 2014-10-28 Carlisle Interconnect Technologies, Inc. Hold-down assembly
US9371142B2 (en) 2010-03-29 2016-06-21 Carlisle Interconnect Technologies, Inc. Hold-down assembly
CN104507291A (zh) * 2014-12-16 2015-04-08 中航光电科技股份有限公司 用于机柜的助拔式机箱托架装置
CN104507291B (zh) * 2014-12-16 2018-01-02 中航光电科技股份有限公司 用于机柜的助拔式机箱托架装置
US9816311B2 (en) * 2015-07-17 2017-11-14 Eutimio Reyes Portable barrier for a door sill
US20170181308A1 (en) * 2015-12-16 2017-06-22 Tyco Electronics Corporation Electronic unit hold down assembly
US10739833B2 (en) * 2018-06-04 2020-08-11 Cooler Master Co., Ltd. Fluid connector assembly

Also Published As

Publication number Publication date
FR2163415B1 (it) 1974-08-02
IT947934B (it) 1973-05-30
GB1339102A (en) 1973-11-28
FR2163415A1 (it) 1973-07-27

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