CN102301535A - Screw support for fastening multiple screws - Google Patents

Abstract

The present invention relates to a screw support for fastening a plurality of screws. The screw supporter includes: a first planar member (111) having a first recess (113) for receiving a first screw, the first recess (113) being formed to prevent the first screw from slipping out after insertion; a second planar member (115) having a second recess (117) for receiving a second screw, the second recess being formed to prevent the second screw from slipping out after insertion; and an engagement member (118) for flexibly engaging the first planar member with the second planar member.

Description

Screw support for fastening multiple screws

technical field

Background technique

The invention relates to the field of electrical screw connectors. In the installation of Remote Radio Units (RRU, Remote Radio Unit) and other outdoor telecommunication units, there are some problems: During the transportation or installation of the unit, the screw to the grounding cable lug has been dropped or lost. Therefore, the screws should be tightened carefully. Also, in some countries there are regulations that require the use of two separate screws to attach the ground. When the above units are installed in a site, the ground contact and screw clamping force must be maintained over a long period of time, several years.

Contents of the invention

The aim achieved by the present invention is to provide a concept for efficient fastening of screws, especially grounding screws in telecommunication equipment.

According to one aspect, the invention relates to a screw support for fastening a plurality of screws. The screw support includes: a first planar member having a first recess for accommodating a first screw, the first recess being formed to prevent the first screw from sliding out after insertion; and a second recess for accommodating a second screw. a second planar part of the seat, a second recess formed to prevent the second screw from sliding out after insertion; and an engagement part for flexibly engaging the first planar part with the second planar part. Preferably, the engagement member is resilient to allow flexible screw adjustment.

According to an embodiment form, the screw support further comprises a first washer rotatably arranged in the first recess, and a second washer rotatably arranged in the second recess, the first washer being formed to accommodate The first screw, the second washer are formed to receive the second screw.

According to an embodiment form, the first washer and the second washer respectively comprise circular grooves formed in respective outer walls of the corresponding first and second washer, and wherein the first recess and the second recess respectively comprise respectively A circular elevation that engages in a circular groove.

According to an embodiment form, the washers can each have an internal thread, and wherein a screw is screwed or inserted into the washers. Thus, a screw (eg captive screw) may be retained in the washer by the recess in the upper portion of the thread.

According to an embodiment form, the planar part holds a washer, wherein the washer is adapted to hold the screw.

According to an embodiment form, the first planar part and the second planar part each comprise a radially extending cutout delimiting a plurality of elastic parts for preventing the first screw or the second screw from slipping out.

According to an embodiment form, the engaging part is U-shaped, wherein the distance between the respective ends of the engaging part and the top of the engaging part is greater than or equal to the distance between the centers of the first and second recesses.

According to an embodiment form, the joint part is U-shaped, wherein the first planar part and the second planar part are arranged at respective ends of the joint part.

According to an embodiment form, the first planar part, the second planar part and the joining part are integrally formed.

According to an embodiment form, the screw support further comprises a fastening strip extending from the first planar part or from the second planar part, the fastening strip comprising recesses for receiving the fastening screws.

According to an embodiment form, the first planar part, the second planar part and the joining part are made of an elastic material, in particular of silicone, rubber or plastic or spring steel.

According to yet another aspect, the present invention relates to a ground screw arrangement comprising a screw support, a first ground screw retained in a first recess of a first planar part, and a second recess retained in a second planar part the second ground screw in the

According to yet another aspect, the invention relates to an electrical arrangement comprising a housing for housing electrical components; and

A ground cable including a cable lug connected to the housing via a ground screw set.

Description of drawings

Further embodiment forms will be described with reference to the following drawings in which:

Fig. 1 shows an embodiment form of grounding screw arrangement;

Figures 2a to 2c show an embodiment form of utilization of the ground screw arrangement;

Figures 3a to 3c show an embodiment form of ground screw arrangement;

Figure 4 shows an embodiment form of a ground screw support.

Detailed ways

FIG. 1 shows an embodiment form of a ground screw arrangement comprising a screw support 101 , a first washer 103 , a second washer 105 , a first screw 107 and a second screw 109 . In one embodiment, screws 107 and 109 may be captive screws.

The screw support 101 comprises a first planar part 111 having a first recess 113 and a second planar part 115 having a second recess 117 . The planar members 111 and 113 are flexibly joined by a joining member 118 which may be U-shaped.

Planar members 111 and 115 are provided to accommodate respective washers 103 and 105, respectively. Gaskets 103 and 105, respectively, may include at least one circular 360 degree groove 119, 121 formed in the outer wall of the respective gasket 103, 105, respectively. Washers 103 and 105 may have internal threads, where the thread dimensions may correspond to the threads of the screws.

Optionally, the screw support 101 may include a fastening strip 123 extending outwardly (eg, extending outwardly from the first planar member 111 ). At its end, the fastening strip 123 comprises a planar part 125 with a recess 127 for receiving eg a fastening screw.

The screw support 101 may be used to connect the cable lug 129 of the ground cable 131, eg to the housing of an electrical component (not shown in the figure).

Figure 2a to Figure 2c show how to install and use the ground screw in Figure 1. For example, as shown in FIG. 2 a , washers 103 and 105 are first inserted into corresponding recesses 113 and 117 of screw support 101 . Due to the flexibility of the screw support 101 in the form of a flexible strip, the washers 103 and 105 can be pressed into respective recesses 113 and 117 . Then, the washers 103 and 105 are locked in the axial direction by means of the grooves 119 and 121 . However, the washers 103 and 105 are not locked in order to allow the washers 103 and 105 to rotate in the recesses 113 and 117 . Thereafter, the screws 107 and 109 may be inserted or tightened into the washers as shown in Figure 2b. Figure 2c shows the resulting assembly. Alternatively, the screws 107 , 109 can also be inserted/tightened into the washers 105 , 107 first, and then the washers 103 , 105 can be pressed/positioned into the respective recesses 113 , 117 of the respective planar parts 111 , 115 .

Fig. 3a to Fig. 3b show the method of installing and using the ground screw in Fig. 1 . As shown in FIG. 3 a , the ground screw support 101 may be fastened by securing the fastening strap 123 to the base 303 by fastening screws 301 . Alternatively, snaps for fastening the ground screw support 101 may be provided, which may be integrated with the chassis (ie, base 303 ). The base 303 may be provided with machined surface elements 305 of the base 303 for receiving the screws 107 and 109 . The surface element 305 may be integral with the base 303 or as a plate attached to the housing. As shown in FIGS. 3b and 3c , the cable lug 129 may be fastened to the anti-drop assembly 305 with screws 107 , 109 . Surface element 305 is an electrical contact surface for terminal 129 .

FIG. 4 shows a screw support 401 comprising a first planar part 403 having a first recess 405 and a second planar part 407 having a second recess 409 . Planar members 403 and 407 are flexibly joined by engaging members 411 which may be U-shaped and formed to hold captive screws not depicted in FIG. 4 .

Optionally, the screw support 401 may include a fastening strip 413 extending outwardly (eg, from the first planar member 403 ). At its extremity, the fastening strip 413 comprises a planar part 415 with a recess 417 available for receiving, eg a fastening screw.

The planar parts 403 and 407 can have radially extending cutouts 419 respectively, and these cutouts 419 form a plurality of elastic parts 421 for preventing the first screw or the second screw from slipping out.

The screw support 401 provides a solution with a captive screw which, after being pressed in, can be held by a thin stainless flexible sheet metal part such as the screw support 401 using spring steel. The main function is to hold the screws together and allow for individual tightening/loosening. A strip of flexible spring steel of sufficient length meets this requirement at the same time, since it is incompressible between the screw head and the ground lug.

According to some embodiments, a metal washer (eg, unthreaded) may also be pressed onto the screw. Furthermore, the shape of the rubber or metal strip forming the screw support can be manufactured differently. Also, more than two screws may be used, for example, 4 screws.

The screw support 101 , 401 makes it possible to hold two or more screws in one common part. Furthermore, the screws can be screwed in and out individually. According to some implementation forms, the screws may be fastened by the screw support 101 , 401 to prevent falling out during installation and handling. According to some implementation forms, the friction created between the screw head and the washer 119, 121 respectively does not twist or rotate the screw support 101 (which may be formed, for example, by a rubber strip).

According to some implementation forms, both ground screws 107 and 109 may be held for two metal (eg stainless steel) washers 103, 105 based on flexible silicone strips (eg with holes or recesses 113, 115 screw support 101). . The outside of the gasket may have 360 degree grooves 119,121. Metal washers 103 , 105 can be fitted into the silicon strip 101 and secured by rubber surrounding the grooves 119 , 121 . The holes 113, 115 in the rubber should allow the respective washers 103, 105 to rotate without simultaneously turning or twisting the rubber strips. When the screws 107, 109 are tightened, the friction between the screw head and the washer may cause the washer to rotate with the screws 107, 109.

According to some implementation forms, both washers 103, 105 can be held together in one common joint part, wherein the screws can be tightened or unscrewed individually. Additionally, the strap 123 may be attached to the base 303 using separate screws or a "rubber strap in a keyhole" solution.

According to some implementation forms, the ground screws 107, 109 may be screwed through the respective washers 103, 105 respectively. Since the screws 107 , 109 may have shoulders for tightening the screws 107 , 109 , when the screws 107 , 109 are removed from the base 303 , the screws 107 , 109 may still be retained by the washers 103 , 105 .

Claims (13)

1. A screw support for fastening a plurality of screws, said screw support comprising: a first planar member (111) having a first recess (113) for receiving a first screw, said first recess (113) being formed to prevent said first screw from slipping out after insertion; a second planar member (115) having a second recess (117) for receiving a second screw, said second recess being formed to prevent said second screw from slipping out after insertion; and An engaging member (118) for flexibly engaging said first planar member (111) and said second planar member (115). 2. The screw support according to claim 1, further comprising a first washer (103) rotatably arranged in the first recess (113), and a rotatably arranged in the second recess A second washer (105) in the seat (117), said first washer (103) for receiving said first screw, said second washer (105) for receiving said second screw. 3. The screw support according to claim 2, wherein said first washer (103) and said second washer (105) respectively comprise respective circular grooves (119, 121) formed in the outer wall, and wherein said first recess (113) and said second recess (115) respectively comprise ) in the meshing circular ridge. 4. A screw support according to claim 2 or 3, wherein the washer (103, 105) has an internal thread, into which the screw is screwed or inserted. 5. Screw support according to claim 2 or 3 or 4, wherein said planar part (111, 115) holds said washer (103, 105), and wherein said washer (103, 105) is adapted to hold the screw. 6. The screw support according to claim 1, wherein said first planar member (403, 407) and said second planar member each comprise a radially extending cutout (419), said cutout (419) defining A plurality of elastic components (421) are used to prevent the first screw or the second screw from slipping out. 7. The screw support according to any one of the preceding claims, wherein the engagement member (118) is U-shaped, and wherein respective ends of the engagement member (118) are aligned with the engagement member (118) ) is greater than or equal to the distance between the centers of said first and said second recesses (113, 115). 8. The screw support according to any one of the preceding claims, wherein said engaging member (118) is U-shaped, and wherein said first planar member (111) and said second planar member ( 115) are respectively provided at the ends of said engaging parts (118). 9. The screw support according to any one of the preceding claims, wherein the first planar part (111), the second planar part (115) and the engagement part (118) are formed in one piece. 10. The screw support according to any one of the preceding claims, further comprising a fastening strip (123) extending from the first planar part (111) or from Said second planar part (115) extends, said fastening strip (123) comprising recesses (127) for receiving fastening screws. 11. The screw support according to any one of the preceding claims, wherein said first planar part (111), said second planar part (115) and said engaging part (118) are made of elastic material made of, especially silicone, rubber, plastic or spring steel. 12. A ground screw assembly comprising: A screw support according to any one of claims 1 to 10; a first ground screw (107) retained in said first recess (113) of said first planar member (111); and A second ground screw (109) retained in said second recess (117) of said second planar member (115). 13. An electronic device comprising: housing (303) for electrical components; and A grounding cable (131) comprising a cable lug (129), said cable (129) being connected to said housing (303) by means of a grounding screw arrangement according to claim 10.

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