CN206918204U - A kind of plastic belt pulley - Google Patents

Abstract

The utility model discloses a kind of plastic belt pulley, including outer ring to form the pulley body of belt grooves, and the belt grooves are made up of the left and right cell wall of bottom surface and both sides, and left and right cell wall medial surface is provided with raised guide pad；One circle magnet is installed on the bottom surface of the belt grooves；Plastic belt pulley also includes being used for the locating piece for positioning belt, and locating piece is installed between the left and right cell wall of belt grooves, and the left and right side of locating piece is provided with guide groove, and the guide pad is connected in guide groove and guide groove can radially slide relative to guide pad；Magnetic patch is installed, and magnetic patch repels each other with magnet on the inner face of the locating piece.Guide groove on locating piece can slide along inside and outside guide pad, and when belt is installed, locating piece overcomes the repulsion between magnetic patch and magnet inwardly to move so that the external diameter of belt pulley reduces, so as to facilitate the installation of belt.In addition, by the interaction of magnet and magnetic patch, the external diameter of belt pulley can be adjusted automatically, and its application is wider.

Description

A kind of plastic belt pulley

Technical field

A kind of plastic belt pulley is the utility model is related to, one kind is particularly related to and is easy to belt to install and can automatically adjust outer The belt pulley in footpath.

Background technology

Belt pulley is will to be converted into the instrument of linear motion, and existing belt pulley is typically by pulley body and one Body is arranged at the belt grooves composition of pulley body periphery, and the middle part of pulley body is provided with axis hole.Existing belt pulley is once After being made, the external diameter of its belt trench bottom is fixed, and it can only be coordinated with the belt of length-specific, application Limitation is bigger.In addition, belt is generally enclosed on driving wheel and driven pulley simultaneously, in order to reach the effect of fastening, belt Length is slightly larger than girth between driving wheel and driven pulley, due to the limitation of Belt Length, belt be difficult be installed on driving wheel and On driven pulley.

In addition, belt pulley in transmission process, usually relies on rubbing between belt pulley bottom or side and balata belt Wipe power to be driven, substantial amounts of heat can be produced during friction, these heats are accumulated in belt grooves and balata belt, it is difficult to dissipate Go, temperature when making the belt work greatly improves, and accelerates the rate of ageing of balata belt, influences its service life.Except this with Outside, existing belt pulley is typically all and is directly attached tumbler and mounting hole, and the rotational efficienty of this belt pulley is low Under, rotating speed it is generally slower.

Utility model content

The utility model provides a kind of belt pulley, and its main purpose is to overcome belt installation fiber crops existing for prior art Tired, the defects of application limitation is larger and radiating effect is poor.

The technical solution of the utility model is as follows：

A kind of plastic belt pulley, including pulley body made of plastics, the center of the pulley body offer installation Hole, the outer ring of pulley body form belt grooves, and the belt grooves are made up of the left and right cell wall of bottom surface and both sides, described left and right Raised guide pad is symmetrically provided with cell wall medial surface, the guide pad is uniformly distributed in left and right cell wall medial surface；The skin One circle magnet is installed on the bottom surface of trough of belt；The belt pulley also includes being used for positioning the locating piece of belt, between the locating piece Every and between being evenly mounted on the left and right cell wall of belt grooves, guide groove is symmetrically provided with the left and right side of locating piece, The guide groove is radially extended, and the guide pad is connected in guide groove and guide groove can be radially sliding relative to guide pad It is dynamic；Magnetic patch is installed with the inner face of the locating piece, and magnetic patch repels each other with magnet.

Further, the pulley body includes left and right back-up ring and middle wheel rim, between left and right back-up ring and wheel rim It is be combined with each other by rivet, the part that left and right back-up ring protrudes from wheel rim forms left and right cell wall；The periphery of wheel rim forms belt The bottom surface of groove.The left and right back-up ring and wheel rim of the utility model plastic belt pulley are individually produced, and are then assembled again, its Difficulty of processing is greatly reduced so that production efficiency is obviously improved.

Further, the width of the magnet and magnetic patch is identical with the distance between left and right cell wall.

Further, the left and right side of the locating piece is born against in left and right cell wall medial surface, the locating piece Outer face is in circular arc.The outer face of locating piece is circular arc, thus well belt can be coordinated to be driven.

Further, the cross section of the guide groove is rectangular.

Further, the cavity of an annular, the cavity are formed between the inner face and magnet of each locating piece The air vent connected with cavity is uniformly offered on corresponding left and right cell wall.Outside air can flow through air vent, cavity and The inner face in gap and belt between locating piece carries out heat exchange, and radiating effect is good, so as to extend the use longevity of belt Life.

Further, the plastic belt pulley also includes a bearing, and the bearing is installed in mounting hole.Pass through bearing Setting is favorably improved transmission efficiency.In order to reach preferable effect, above-mentioned bearing includes inner ring, outer ring and ball, on inner ring Provided with interior raceway, outer ring is provided with outer raceway, and the radial section of the interior raceway and outer raceway is triangular in shape, the ball point It is not tangent with inside and outside raceway.It is tangent between ball and inside and outside raceway so that contact area diminishes, and reduces friction during rolling Power, not only it is more conducive to rotate, and decreases heat caused by friction.

From above-mentioned to description of the present utility model, compared to the prior art, the utility model has the following advantages that：It is fixed Guide groove on the block of position can slide along inside and outside guide pad, when belt is installed, locating piece overcome repulsion between magnetic patch and magnet to Interior motion so that the external diameter of belt pulley reduces, so as to facilitate the installation of belt.In addition, by the interaction of magnet and magnetic patch, The external diameter of belt pulley can be adjusted automatically, and its application is wider.

Brief description of the drawings

Fig. 1 is the partial sectional view of belt pulley when not installing belt.

The partial sectional view of belt pulley when Fig. 2 is installation belt.

Fig. 3 is the structural representation of left back-up ring or right back-up ring.

Fig. 4 is along the locating piece in A-A directions and the sectional view of magnetic patch in Fig. 2.

Fig. 5 is the cross-sectional view of bearing.

Fig. 6 is the structural representation of embodiment two.

Embodiment

Illustrate specific embodiment of the present utility model with reference to the accompanying drawings.

Referring concurrently to Fig. 1, Fig. 2 and Fig. 3, a kind of plastic belt pulley, including pulley body 1 made of plastics, the belt The center of wheel body 1 offers mounting hole 11, and bearing 10 is provided with mounting hole 11.The pulley body 1 includes left and right gear Circle 2 and middle wheel rim 3, are be combined with each other, left and right back-up ring 2 protrudes from wheel rim between left and right back-up ring 2 and wheel rim 3 by rivet 23 3 part coordinates wheel rim 3 to form belt grooves again, and belt 4 can be arranged in belt grooves during use, its middle left and right back-up ring 2 protrusion wheel The part of rim 3 forms the left and right cell wall 21 of belt grooves；The periphery 31 of wheel rim 3 forms the bottom surface of belt grooves, on the periphery 31 Magnet 5 of one ring around wheel rim 3 is installed, in order to strengthen magnetic, the width of the magnet 5 is generally identical with the thickness of wheel rim 3.This The left and right back-up ring 2 and wheel rim 3 of utility model plastic belt pulley are individually produced, and are then assembled again, its difficulty of processing is big It is big to reduce so that production efficiency, which has, to be obviously improved.

With continued reference to Fig. 1 and Fig. 3, raised guide pad 22 is symmetrically provided with the left and right medial surface of cell wall 21, it is described Guide pad 22 is uniformly distributed in the left and right medial surface of cell wall 21.The plastic belt pulley also includes being used for the locating piece for positioning belt 4 6 (being generally made up of light plastic), the locating piece 6 are spaced and are evenly mounted between the left and right cell wall 21 of belt grooves, fixed The left and right side of position block 6 is born against in the left and right inner side of cell wall 21, in order to preferably coordinate belt 4 to work, the locating piece 6 Outer face be in circular arc.Referring concurrently to Fig. 4, guide groove 61, guide groove are symmetrically provided with the left and right side of locating piece 6 61 cross section is rectangular, and the guide groove 61 radially extends；Above-mentioned guide pad 22 is connected in guide groove 61 and led It can be radially slided to groove 61 relative to guide pad 22；Be installed with magnetic patch 7 on the inner face of the locating piece 6, and magnetic patch 7 with Magnet 5 repels each other.

With continued reference to Fig. 1, when belt 4 is not installed, under the effect of the repulsion of magnet 5 and magnetic patch 7, the guiding on locating piece 6 Groove 61 slides into outermost end along guide pad 22, and now, the inner face of guide groove 61 is resisted against the inner face of guide pad 22, belt pulley External diameter reach maximum.With continued reference to Fig. 2, after belt 4 are installed, under the fastening effect of belt 4, locating piece 6 overcomes magnetic Repulsion slid inward between iron 5 and magnetic patch 7, now, the external diameter of belt pulley can be adjusted automatically according to the length of belt 4, Reach a dynamic equilibrium.

Referring concurrently to Fig. 5, bearing 10 includes inner ring 101, outer ring 102 and ball 103, and inner ring 101 is provided with interior raceway 104, outer ring 102 is provided with outer raceway 105, in order to reach preferably transmission effect, the interior raceway 104 and outer raceway 105 Radial section is triangular in shape, and the ball 103 is tangent with inside and outside raceway 104,105 respectively.Ball 103 and inside and outside raceway 104th, it is tangent between 105 so that contact area diminishes, and reduces frictional force during rolling, is not only more conducive to rotate, and subtract Heat caused by friction is lacked.

Embodiment two

The structure of reference picture 6, the present embodiment and such scheme is essentially identical, and its main distinction is, the present embodiment dissipates Thermal effect is obviously improved compared to such scheme.It is spaced apart on the left and right cell wall 21 of the present embodiment provided with strip Air vent 8, the cavity 9 of an annular, the position pair of the air vent 8 are formed between the inner face and magnet 5 of each locating piece 6 Should be in the position of cavity 9.Outside air can flow through the gap 62 and belt 4 between air vent 8, cavity 9 and locating piece 6 Inner face carry out heat exchange, radiating effect is good, so as to extend the service life of belt 4.

Specific embodiment of the present utility model is above are only, but design concept of the present utility model is not limited thereto, All changes for carrying out unsubstantiality to the utility model using this design, belong to invade the row of scope of protection of the utility model For.

Claims (7)

1. a kind of plastic belt pulley, including pulley body made of plastics, the center of the pulley body offers mounting hole, The outer ring of pulley body forms belt grooves, and the belt grooves are made up of the left and right cell wall of bottom surface and both sides, it is characterised in that： Raised guide pad is symmetrically provided with the left and right cell wall medial surface, the guide pad is uniformly distributed on the inside of left and right cell wall Face；One circle magnet is installed on the bottom surface of the belt grooves；The belt pulley also includes being used for the locating piece for positioning belt, described Position block gap and be evenly mounted between the left and right cell wall of belt grooves, be symmetrically provided with the left and right side of locating piece Guide groove, the guide groove radially extend, and the guide pad is connected in guide groove and guide groove can be relative to guide pad Radially slide；Magnetic patch is installed with the inner face of the locating piece, and magnetic patch repels each other with magnet.

2. plastic belt pulley according to claim 1, it is characterised in that：The pulley body include left and right back-up ring and Middle wheel rim, is be combined with each other, the part that left and right back-up ring protrudes from wheel rim is formed between left and right back-up ring and wheel rim by rivet Left and right cell wall；The periphery of wheel rim forms the bottom surface of belt grooves.

3. plastic belt pulley according to claim 1, it is characterised in that：The width of the magnet and magnetic patch with it is left and right The distance between cell wall is identical.

4. plastic belt pulley according to claim 1, it is characterised in that：The left and right side of the locating piece is born against In left and right cell wall medial surface, the outer face of the locating piece is in circular arc.

5. plastic belt pulley according to claim 1, it is characterised in that：The cross section of the guide groove is rectangular.

6. belt pulley according to claim 1, it is characterised in that：Formed between the inner face and magnet of each locating piece The cavity of one annular, the air vent connected with cavity is uniformly offered on left and right cell wall corresponding to the cavity.

7. plastic belt pulley according to claim 1, it is characterised in that：The plastic belt pulley also includes a bearing, institute Bearing is stated to be installed in mounting hole.