CN2342440Y

CN2342440Y - Fly wheel bearing connector for recorder

Info

Publication number: CN2342440Y
Application number: CN98234528U
Authority: CN
Inventors: 管星星
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-06-26
Filing date: 1998-06-26
Publication date: 1999-10-06
Anticipated expiration: 2008-06-26
Also published as: AU3405899A; WO2000000967A1

Abstract

The utility model relates to a flywheel bearing connector for recorders. A metal base plate is provided with a bearing positioning hole in an irregular shape. One side of the hole is provided with protruding dots or cambered surfaces which are connected with the circumference occupied by a bearing, and the other side of the hole is provided with metal sheets which keep gaps from the circumference occupied by the bearing. The rear part of the metal sheets partially covers the screw holes on a plastic frame, and the bearing can be clamped in the positioning hole by screwing in screws to squeeze the metal sheets to deform towards the direction of the bearing. The connector of the utility model has the advantages of convenient assembly and reliable connection.

Description

The flywheel bearing coupling arrangement of sound-track engraving apparatus

The utility model relates to the bearing of the flywheel (belt pulley) that drives tape in the sound-track engraving apparatus and the coupling arrangement of metal substrate.

The flywheel bearing of sound-track engraving apparatus is contained on the plastic stent.When the flywheel high-speed rotation, the axle and the bearing of flywheel can produce heat of friction and also can produce frictional static and cause electrostatic noise.Therefore bearing should link to each other with the metal substrate of movement, is beneficial to heat radiation and eliminates static.Early stage recorder core is that property-line links to each other bearing with metal substrate, although can eliminate static.But radiating effect is not good enough.

In the present recorder core, bearing links to each other with metal substrate and generally adopts 3 method of clamping, promptly, have a hole in irregular shape on the metal substrate, outstanding 2 the periphery circles that should occupy with the bearing that is in correct installation site of one lateral edges in this hole join, the opposite side in hole has two L shaped grooves, form sheet metal between two grooves, the front end of sheet metal is slightly charged into the circumference that bearing should occupy in correct installation site, as Fig. 1, bearing is packed into, and sheet metal has a small amount of elastic deformation in this hole, presses in bearing one side according to sheet metal elastic force, bearing is pressed on two projecting points of opposite side in hole to constitute 3 clampings.Because the sheet metal front end is charged into the position that bearing should occupy.The outside extrusion metal sheet of palpus when bearing is installed, if extruding force is excessive may to be made the sheet metal buckling deformation and causes metal substrate to be scrapped, if the poor direction of extruding force really may cause the sheet metal perk, frame makes on bearing and connects unreliable possibility scratching flywheel, as Fig. 2.Thereby existing bearing and 3 modes of being clamped and connected of sheet metal cause bearing assembling difficulty.

The purpose of the utility model is to provide a kind of easy to assemblyly, connects the flywheel bearing coupling arrangement of reliable sound-track engraving apparatus.

Coupling arrangement described in the utility model, bearing and the metal substrate that can be fixed on the plastic stent that flywheel is arranged, have bearing pilot hole in irregular shape on the metal substrate, one lateral edges in hole has outstanding point or cambered surface and is in the circumference that the bearing of correct installation site should occupy and joins, the opposite side in hole has a sheet metal, front end one side of sheet metal and bearing are gapped between the circumference that correctly installation site should occupy, this gap is less than the elastic deformation amount of sheet metal to the bearing direction, the local screw that hides on the plastic stent of the opposite side of sheet metal, screw in awl bar screw in the screw, shank of screw metal that can be squeezed sheet is clamped in bearing in the bearing pilot hole to bearing direction elastic deformation.

Coupling arrangement described in the utility model, because gapped between the circumference that sheet metal and bearing should occupy, when assembling, bearing and pilot hole are loose fit, are easy to bearing put into the hole and needn't pressure, can avoid the sheet metal perk to be out of shape fully.The extrusion metal sheet is to bearing direction elastic deformation gradually when screwing in awl bar screw, and its extruding force evenly can be not too quickly or excessive and cause the sheet metal buckling deformation.Screw extrusion metal sheet also can be regulated the elastic deformation amount of sheet metal in a small amount, and promptly the scalable metal substrate is to the holding force of bearing.Thereby described coupling arrangement is easy to assembly and it is reliable to connect.

Fig. 1 belongs to the synoptic diagram of 3 clampings of metal substrate of prior art;

Fig. 2 is Fig. 1 right view;

Fig. 3 is the front view that coupling arrangement described in the utility model does not tighten up state, and the A-A cut-open view of Fig. 5;

Fig. 4 is the front view that Fig. 3 is in the state of tightening up;

The sectional arrangement drawing of Fig. 5 flywheel, bearing and plastic stent and metal substrate.

Fig. 1 represents that sheet metal 3 front ends charge into the circumference that bearing 2 should occupy.The sheet metal 3 perk states that Fig. 2 expresses possibility and takes place.

As the cut-away view of Fig. 5, the axle of flywheel 7 penetrates bearing 2, and bearing 2 is contained on the plastic stent 4, and metal substrate 1 is fixed on the support 4.

Have bearing pilot hole 2a in irregular shape on the metal substrate 1, the circumference that two cambered surfaces that one lateral edges in hole is outstanding and the correct installation site of bearing should occupy joins, the opposite side of hole 2a has sheet metal 3, between the circumference of front end one side of sheet metal 3 and the correct installation site of bearing gapped 6.As Fig. 3, sheet metal 3 opposite sides hide a screw 5 on the plastic stent 4, screw in screw 5a metal that can be squeezed sheet 3 and are out of shape and clamping bearing 2 to bearing 2 directions.

Claims

1. the flywheel bearing coupling arrangement of sound-track engraving apparatus, the bearing (2) of flywheel is arranged and can be fixed on metal substrate (1) on the plastic stent (4), have bearing pilot hole in irregular shape (2a) on the metal substrate (1), one lateral edges in hole has outstanding point or cambered surface and is in the circumference that the bearing (2) of correct installation site should occupy and joins, the opposite side in hole (2a) has a sheet metal (3), it is characterized in that between the circumference that front end one side of sheet metal (3) and bearing (2) should occupy in correct installation site gapped (6), this gap is less than the elastic deformation amount of sheet metal (3) to bearing (2) direction, the local screw (5) that hides on the plastic stent (4) of the opposite side of sheet metal (3), screw in awl bar screw (5a) in the screw, shank of screw metal that can be squeezed sheet (3) is clamped in bearing (2) in the bearing pilot hole (2a) to bearing (2) direction elastic deformation.