CN2181563Y - Additional fastening device for bell mouth of electric coal drill - Google Patents

Abstract

The utility model belongs to an accessory for a drilling tool, aiming to solve the problem that the bell mouth of an electric coal drill is easy to loosen, a cable loses a clamping state, and faults, such as the short circuit and phase failure of the electric coal drill are created. The utility model is composed of a knurled cap (8) and two screws (13). When using, the knurled cap (8) is sheathed with a wire inlet bushing (2), the clamping grooves (14) of the screws (13) are clamped with the circular rings (11) of the knurled cap (8), and a screw hole in the other end of each of the screws (13) is connected with screw bolts (7) on a flange. When the screw bolts (7) are fastened, a spring pushes pins (17), and the pins (17) are clamped in the recesses (12) of the circular rings (11) of the knurled cap via passing through the clamping grooves (14).

Description

Additional fastening device for bell mouth of electric coal drill

The utility model relates to drilling tool attachment technique field, specifically, is exactly a kind of electric coal drill annex.

Electric coal drill is the channel of coal mining working surface perforating instrument of blowing out commonly used, horn mouth is the line leading device of electric coal drill feed cable, its structure as shown in Figure 1, cable (1) is inserted in the entrance bushing (2), receives on the interior prap of electric coal drill main body by the splicing sleeve (3) that can insert the electric coal drill main body.Bell-mouthed main effect, be when entrance bushing (2) is tightened on the gripping sleeve (4), the clamping device that is provided with in the gripping sleeve (4) will clamp cable (1), make electric coal drill in dilatory process, the pulling force of cable (1) can not directly act on prap, to keep wiring intact.The outer rim of entrance bushing (2) is provided with groove (5), screws to use special tool.Whole horn mouth device is connected with the electric coal drill main body by the bolt (7) that is located on the flange (6).In actual use, because the underground work amount is big, shaking force is strong, aforementioned entrance bushing (2) is easy to automatic hard waste with being threaded of gripping sleeve (4) and releases, make cable (1) lose original clamped condition, therefore and human casualty accidents such as electric shock, mistake be quick-fried are produced even caused in influence therefore dilatory the moving of electric coal drill can only rely on the prap of wiring chamber to bear pulling force, normal and cause faults such as the phase failure, short circuit, leakage ground.

The purpose of this utility model designs a kind of additional fastener exactly, overcomes existing electric coal drill horn mouth and is easy to the defective that automatic hard waste releases.

The utility model is to realize like this, design a colored cap (8), the one end is one section garden tube (9), the inner edge of garden tube (9) has the corresponding strip projection of groove (5) (10) with aforementioned entrance bushing (2), the other end of flower cap (8) encircles (11) for the garden that is enclosed within garden tube (9) on, become one with garden tube (9), the garden of garden ring (11) has recess (12) on week, flower cap (8) can be sleeved on the entrance bushing (2).In addition, design two sizes, spiral shell card (13) that shape is identical again, spiral shell card (13) one ends have the draw-in groove (14) on the garden ring (11) that may be stuck in colored cap (8), other end end face has screwed hole (15), this hole extends through draw-in groove (14) along the inside of spiral shell card (14) to the other end, and the bore of screwed hole (15) should be complementary with the bolt (7) on the horn mouth flange (6).Screw (15) is built-in with spring (16) and pin (17).During use, to spend cap (8) to be sleeved on the entrance bushing (2), its projection (10) embeds in the groove (5) of entrance bushing (2), the draw-in groove of spiral shell card (13) (14) is stuck on the garden ring (11) again, and the screwed hole of its other end (15) is connected with bolt (7).When bolting on (7), bolt (7) will promote spring (16) and pin (17), making pin (17) pass draw-in groove (14) garden that is stuck in encircles in the recess (12) of (11), like this, entrance bushing (2) is linked to be an integral body by colored cap (8) and the spiral shell card (13) that is stuck on its groove (5) with flange (6), makes entrance bushing all be difficult to become flexible in all directions.

Fig. 1 is the horn mouth structural representation, and Fig. 2 is flower cap (8) structural representation, and Fig. 3 is spiral shell card (a 14) structural representation, and Fig. 4 installs this additional fastener structural representation for horn mouth.

After the electric coal drill horn mouth is installed this additional fastener, entrance bushing (2) connects to an integral body with flange (6), or else the hard waste phenomenon that releases can take place, thereby make cable remain clamped condition, during dilatory mobile electric coal drill, its prap does not stress, like this, just fundamentally stopped generation, alleviated the maintenance of electric coal drill greatly, also helped the safety in production in colliery by faults such as the loosening phase failure that causes of horn mouth, short circuit, leakage ground.

Claims (1)

1. A kind of additional fastener that is installed on the electric coal drill horn mouth, it is characterized in that, this device is by a colored cap (8) and two sizes, the spiral shell card (13) that shape is identical is formed, one end of flower cap (8) is garden tube (9), the other end is for being enclosed within on the garden tube (9), encircle (11) with the garden that garden tube (9) becomes one, the garden of garden ring (11) has recess (12) on week, the inner edge of garden tube (9) has the corresponding strip projection of groove (5) (10) with horn mouth entrance bushing (2), spiral shell card (13) one ends have the draw-in groove (14) on the garden ring (11) that may be stuck in colored cap (8), other end end face has screwed hole (15), bolt (7) on its bore and the horn mouth flange (6) is complementary, screwed hole (15) is built-in with spring (16) and pin (17), this hole along spiral shell card inside to the other end along stretching and passing draw-in groove (14), during use, flower cap (8) is sleeved on the entrance bushing (2), its strip projection (10) embeds in the groove (5) of entrance bushing (2), the draw-in groove (14) of spiral shell card (13) is stuck on the garden ring (11) of colored cap (8), its screwed hole (15) links to each other with bolt (7), when bolting on (7), spring (16) promotes pin (17) and passes in the recess (12) that draw-in groove (14) is stuck in colored cap (8).

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