CZ170599A3 - Motor terminal box - Google Patents

Abstract

A motor terminal box is made in two parts 4 and 5. The two parts hold a frame-like seal 6 between them, to protect against contamination and the like. However, the two parts also abut each other, with protrusion 46 touching surface 36, to create an electrical connection between them - this provides shielding. Each part of the terminal box holds a connector (64, Fig 2 and 67, Fig 3). The terminal box may be sealed to the motor housing (2, Fig 1) in the same manner.

Description

Technical field

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a motor terminal box for fastening to a motor housing which comprises first and second portions between which a frame seal is arranged and which are connected to each other.

BACKGROUND OF THE INVENTION

In one known embodiment of the motor terminal box of this kind, the motor terminal box consists of two parts, each of which is connected to one part of the plug-in connection. Both parts of the plug-in connection are special components from the manufacturer and have a demanding and expensive construction. Tray-shaped motor terminal box parts must be adapted to accommodate the plug-in connection parts. A shielded motor cable is inserted into the motor terminal box. In order to achieve a good shielding effect, metal-to-metal contact is secured between the two parts of the motor terminal box by means of which the parts of the motor terminal box are screwed together. The metal connection by means of screws can be influenced or even interrupted, for example by soiling, oxidation or externally applied to the motor terminal box by means of varnish layers or the like.

SUMMARY OF THE INVENTION It is an object of the invention to improve a motor terminal box of this kind in such a way that, in a simple design, the required shielding effect is imperfectly ensured.

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SUMMARY OF THE INVENTION

This problem is solved and the drawbacks of known motor terminal boxes of this kind are largely eliminated by a motor terminal box for mounting on the motor housing, which consists of first and second portions between which a frame seal is arranged and which are connected to each other. Plug-in connector components, in particular a plug and plug-in connector, according to the invention, characterized in that the parts of the motor terminal box abut one another with metal contact and counter-contact surfaces.

For structural reasons, it is advantageous if the contact and counter-contact surfaces are arranged at the frame seal, preferably at the inside of the frame seal.

In a practical embodiment, the contact surfaces are formed by at least one extension of one part of the motor terminal box arranged at the frame seal.

Advantageously, a plurality of extensions are provided on one part of the motor terminal box, preferably four extensions arranged in the corner regions.

Furthermore, it is advantageous if one part of the motor terminal box, which is provided with contact surfaces, is designed as a base part.

The counter surface is then formed on the second, tub-shaped part of the motor terminal box.

Preferably, the counter face is formed by a front surface of aaa aa aa aa aa aa aaa aaa aaaa aa aaa aaaa aaaaaaa aa of the motor terminal box-shaped part.

It is further advantageous from the point of view of service life that the frame seal is protectedly mounted in the peripheral flange of a portion of the motor terminal box.

For the same reason, it is advantageous if the frame seal is externally covered by the circumferential rib of the circumferential rim.

In order to ensure a good seal of the motor terminal box, it is further advantageous if part of the motor terminal box is provided with at least one extension on the inside of the peripheral flange.

The protection of the frame seal against damage is achieved in such a way that the frame seal recesses slightly against the extension.

From the point of view of receiving the plug-in connection, it is advantageous if at least one of the parts of the motor terminal box, preferably both, are always provided with at least one support bridge for abutting part of the plug-in connection.

A portion of the motor terminal box is preferably provided with a plurality of support bridges, preferably two support bridges arranged on opposite sides.

Two of the load-bearing bridges are always at the same height so that part of the plug-in connection can be seated correctly.

Advantageously, the portions of the plug-in connection are bolted to the support bridges.

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It is advantageous if both parts of the motor terminal box are each provided with multiple bridges for abutting and fastening the parts of the plug-in connection.

The second part of the motor terminal box is preferably provided with a through hole for the cable gland.

Other features of the invention will be apparent from the description and drawings.

Due to the embodiment of the invention, the metal-to-metal contact is ensured by the metal contact and counter-contact surfaces by which the parts of the motor terminal box abut against each other even under unfavorable conditions such as oxidation, contamination and the like. This reliably prevents a reduction in the shielding effect.

BRIEF DESCRIPTION OF THE DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS The invention is further elucidated with reference to the accompanying drawings, in which: FIG

FIG

FIG. 2 is a perspective view of the motor terminal box mounted on the motor, an exploded perspective view of the motor terminal box of FIG. 1 with the base part, the lid and the fork connected to the lid, a perspective exploded view of the base part of the motor terminal; cabinet according to Fig. 2 with socket, «φφφ φφφφφφφφφφφφ · · ·φ ·φφφφ

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4 shows a view in the direction of arrow IV in FIG. 3 with a seal arranged on the front face of the lid,

FIG. 5 is a section along the line V - V in FIG. 4.

DETAILED DESCRIPTION OF THE INVENTION

The motor terminal box 1 shown in FIGS. 1 to 5 is preferably screwed to the side flange 2 of the motor 3. The motor terminal box 2 consists of a base part 4 and a cover 5, which are screwed together with a frame between them. 4 and 5. The base part 4 and the lid 5 have a rectangular, preferably square contour with rear walls 7 and 8, respectively, and with a circumferential jacket 10 or peripheral edge 9, respectively.

In the cover 5, the motor terminal box 2 is screwed to the side flange 2 of the motor 3. The cover 5 abuts with its rear wall or its peripheral edge 9 on the edge 11 of the side flange 2 of the motor 3. 6, the motor terminal box 1 is preferably also designed as a frame. The rear wall 2 of the lid 5 is provided with a through hole 12 for passing cables from the motor 3 or the like.

The peripheral edge 2 of the lid 2 has a relatively small width. The lid 2 abuts the end face 27 of its peripheral edge 9 on the counter face of the base part 8, which is formed by the front surface 36 of the peripheral shell 10 of the base part 4. In the corner regions 13, 14, 15, 16 FIG. 4, extensions 23, 24, 25, 26 are formed which project inwardly from planar, at right angles to one another.

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The inner sides 32, 33, 3.4, 35 of the lid 5 are arranged in plan view and in plan view according to FIG. 4 have a contour in the form of a part of a circle, preferably a quarter of a circle. In the extensions 23, 24, 25, 26, threaded holes 17, 18, 19, 20 are provided for screws 21, 22 by which the base part 6 and the lid 5 are pulled together. The cover 5 itself is bolted to the side flange 2 of the motor 3 by other screws (not shown).

As shown in FIGS. 4 and 5, the frame seal 6 abuts the face 27 of the circumferential edge 9 of the lid 5. This frame seal 6 has the same contour as the circumferential edge 9, is only slightly narrower and is in its extended corner regions 28. 29, 30, 31 are tapered such that the inward extensions 23, 24, 25, 26 of the circumferential edge 9 extend beyond these widened corner regions 28, 29, 30, 31, as can be seen from FIG. 5.

The projections 41, 42, 43, 44, which extend inwardly beyond the inwardly extending regions 23, 24, 25, 26 of the circumferential edge 9, which are rounded, are disposed towards the base portion 6 of the projecting extension 41, 42, 43, 44 shown in FIG. by means of which the cover 5 in the assembled motor terminal box 1 abuts the front surface 36 of the peripheral shell 10 of the base part 8. Since both the base portion 6 and the lid 5 are made of metal, the metal contact required for the conductive connection of the base portion 6 with the lid 5 is reliably secured to the end surface 36 of the base portion 6 by engaging the extensions 41, 42, 43.

The height of the extensions 41, 42, 43, 44 with the cover 5 not installed is slightly smaller than the thickness of the frame seal 3, which thus protrudes slightly above the extensions 41, 42, 43, 44. As a result, to resiliently grip the frame seal 6 until the extensions 41, 42, 43,

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44 do not rest on the face 36 of the base part 1. Thus, the necessary tight connection of the base part 4 with the lid 5 is achieved.

The edge 11 of the side flange 2 of the motor 2 is preferably designed in the same way as the front side 27 of the circumferential edge 9 of the cover 5. When mounting the cover 5 on the side flange 2, metal contact is also obtained. when the lid 5 is mounted on its rear wall 11.

4 and 5, the frame seal 6 is received in the circumferential rim 45 of the circumferential edge 9 of the lid 5. This circumferential rim 45 is open inwardly while being outwardly defined and covered by a circumferential rib 46 extending above the frontal face. This circumferential rib rests approximately half its width on the end face 36 of the peripheral sheath 10 of the base part 4, thereby also providing metallic contact. The remaining portion of the peripheral rib 46 extends over the peripheral skirt 10. The peripheral rib 46 protects the frame seal 6 from the outside against dirt and damage.

The circumferential edge 9 of the lid 5 is furthermore provided with an extension 47 in the region of the circumferential rim 45 on the inside.

As can be seen from FIG. 5, the inner edge 50 of the frame seal 6 is offset slightly outwardly relative to the extension 47 and the inner side 48 of the circumferential envelope 10 of the base part 4. FIG. The frame seal 6 is thus protected from the inside from damage by components or cables or the like located inside the motor terminal box 1.

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It can further be seen from FIG. 2 that two mutually parallel webs 53, 54, 55, 56, which are preferably identical, protrude from the mutually opposed peripheral edge regions 51, 52.

The lower webs 54 and 56 in FIG. 2, as well as the upper webs 53 and 55, are preferably arranged at the same height. Their inner edges facing each other are preferably rounded in the form of a part of a circle to prevent damage to the cables as they pass through the through hole 12 in the rear wall 7 of the lid 5. In the webs 53, 54, 55, 56 they are in their rounded inner regions threaded holes 57, 58, 59, 60 are formed into which the screws 61, 62, 63 are screwed to fasten the plug 64 in the motor terminal box 1. A plug 67 is assigned to the plug 64, which is fixed in the base according to FIG. part 4.

The base part 4 has the shape of a tray. The peripheral sheath 10 of this base part 4 is several times higher than the peripheral edge 2 of the lid 5. In one of the top walls 65 in FIG. 2, a through hole 66, visible in FIG. 3, is provided for the cable gland 80 through which the cables (not shown) are routed through the cables. These cables are connected to a socket 67, which is bolted by screws 68, 69, 70 to the webs 71 and 72 of the base part 4. These webs 71 and 72 are preferably designed in the same way as the webs 53, 54, 55, 56 of the lid. These bridges 71 and 72 also extend from opposite regions 73, 74 of the peripheral wall 10 and also from the rear wall 8. of the base part 4. Only bridges 71, 72 that are perpendicular to the region are visible in FIG. 74 of the wall of the peripheral shell 10. Two bridges 71, 72 arranged opposite to each other are at the same height. The bridges 71, 72, like the bridges 53, 54, 55, 56, have edges rounded to form part of a circle, and in the region of these edges threaded holes 78, 79 for screws 68, 69, 70 are again formed. sockets 67 built-in and pre-fitted with other electrical «· 4444 • 4 4 · 4444 44 44 ·· ♦ · 4 4444

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4444 44 444 444 444 44 444 44 44 and / or electronic components such as a brake rectifier or the like.

The motor terminal box 1 can be pre-mounted to the side flange 2 of the motor 3 without further action. This is done by attaching the cover 5 with the preassembled fork 64 to the side flange 2 as described above. to fit and attach the base part 4 with the pre-mounted socket 67 thereon, thereby obtaining the necessary electrical connection. When the base part 4 is attached to the lid 5, the socket 67 on the plug 64 will inevitably be plugged. The cable drawn through the cable gland 82 into the base part 4 is connected to the socket 67. The base part 4 is screwed with screws 21, 22 and 21 With a cable gland 80, it is ensured that the shielded cables retain their shielding effect perfectly. For this purpose, the braid of the respective cable is threaded onto the metal sleeve on the cable gland 80, so that a large metal contact is ensured. Said metal sleeve protrudes in a known manner into a rubber cone, which deforms elastically when the parts of the cable gland 80 are screwed together, whereby the braid is pressed against the metal sleeve. In this way, the large-area fitting of the cable braid is required for screening. The metal sleeve is provided with a flange which, when the cable gland parts 80 are screwed together, are firmly pressed against the metal counterpart of the cable gland 80. As the cable gland 80 is screwed into the metal basin 4 in the tray shape, a metal-to-metal contact which, through the metal-to-metal contact described, is transferred between the base part 4 and the lid 5 to the entire motor terminal box 2.

Represented by:

12.05.99

Ing.J.Chlustina ftft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ftftftft ftft ··· ·· ·

- 10 of 03398/99-GB

Claims (16)

PATENT CLAIMS Motor terminal box (1) for mounting on a motor housing (3), comprising first and second parts, between which a frame seal (6) is arranged and which are connected to one another, whereas on these parts are orderly components pluggable joints, especially forks (64) and socket (67) pluggable joints, marked u j í c í se t that parts (4, 5) motor terminal wardrobes (1) on me each other they are flat with metal contact and counter contact surfaces (41, 42, 43, 44, 36). Motor terminal box according to claim 1, characterized in that the contact and counter-contact surfaces (41, 42, 43, 44, 36) are arranged at the frame seal (6), preferably at the inside of the frame seal (6). Motor terminal box according to claim 1 or 2, characterized in that the contact surfaces (41, 42, 43, 44) are formed by at least one extension of one part (5) of the motor terminal box (1) arranged at the frame seal (6). ). Motor terminal box according to one of Claims 1 to 4, characterized in that on one part ( 5) a plurality of extensions (41, 42, 43, 44) are provided in the motor terminal box (1), preferably four in the corner regions (13); 14, 15, 16) of the part (5) of the adapter (41, 42, 43, 44). • 4444 4 * 4 4 4 · · 444 4 4 4 · 4 4 4 4 4 4 ·· ··· 4 4 4 4 44 444 44 Motor clamp cabinet according to any of Claims 1 to 4 v y z n a č u j ici with that one part (5) motor clamp wardrobes (1) which is the abbot: contact areas 41, 42 43, 44) is performed as base part. Motor terminal box according to one of Claims 1 to 5, characterized in that the counter surface (36) is formed on a second tray-shaped part (4) of the motor terminal box (1). Motor terminal box according to claim 6, characterized in that the aperture (36) is formed by the front surface of the peripheral envelope (IC) of the tray-shaped part of the motor terminal box (1). Motor terminal box according to one of Claims 1 to 7, characterized in that the frame seal (6) is securely mounted in the peripheral flange (45) of the motor terminal box part (5). Motor terminal box according to claim 8, characterized is that that Frame seals (6) is obscured from the outside circumferential rib (46) circumferential beading (45). 10. Motor clamp cabinet according to any from claims 1 to 9, characterized is that that motor part (5) the terminal box (1) is provided with at least one extension (47) on the inside of the peripheral flange (45). • ···· * · · · · ··· Motor terminal box according to claim 10, characterized in that the frame seal (6) is slightly recessed relative to the extension (47). Motor terminal box according to one of Claims 1 to 11, characterized in that at least one of the parts (4, 5) of the motor terminal box (1), preferably both of these parts (4, 5), are each provided with at least one a support bridge (53, 54, 55, 56; 71, 72) to abut the portion (64; 67) plug-in connection. The motor terminal box according to claim 12, characterized in that the part (4, 5) of the motor terminal box (1) is provided with several webs, preferably two carrying supports arranged on opposite sides (51, 52; 73, 74). bridges (53, 54, 55, 56; 71, 72), The motor terminal box according to claim 13, characterized in that two of the support bridges (53, 54, 55, 56; 71, 72) each lie at the same height. The motor terminal box according to claim 13 or 14, characterized in that the plug-in connection parts (64, 67) are screwed onto the support bridges (53, 54, 55, 56; 71, 72). Motor terminal box according to one of Claims 13 to 15, characterized in that the two parts (4, 5) of the motor terminal box (1) are each provided with multiple web bridges (53, 54, 55, 56; 71, 72). abutting and fastening the plug-in parts (64, 67). • · 44 44 · 4 · 4 * 4 44 44 4 4 · · · · · · · · 4 · 4 4 ·· · 4 4 4 4 · 4 4 · 4 ··· · 44 4444 44 444 44 44 Motor terminal box according to one of Claims 1 to 16, characterized in that the second part (4) of the motor terminal box (1) is provided with a through hole (66) for the cable gland (80).