Precise-adjustment fully-sealed idle wheel

Abstract

The utility model relates to an accurate adjustment full-sealed idle pulley, which is characterized by comprising a belt pulley, a base, a dustproof cover and a bearing, the outer ring of the bearing is in interference fit with the inner wall of the belt pulley, the base is inserted into the bearing, the outer wall of the base is in interference fit with the inner ring of the bearing, and the dustproof cover is arranged on one side of the belt pulley. The dustproof cover makes contact with the circumference of the belt wheel, contact fixing is achieved, and full-sealing dust prevention is achieved. By designing the positioning pin on the bottom surface of the base, the eccentric position of the idle wheel can be accurately controlled, so that the idle wheel can accurately position and press the belt, the belt change is effectively adapted, and the problem of poor positioning accuracy in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of engine especially relates to a precise adjustment full sealing idler. BACKGROUND

[0002] The eccentric structure idler on the current market has the problems of poor positioning accuracy and weak product protection ability, which cannot meet the needs of modern engines for accurate positioning and adaptation to harsh environment conditions. For example, in some specific conditions, the idler needs to be rotated by a certain angle to compress the belt, but the existing technology often cannot accurately control the rotation angle. If the rotation angle is too small, the belt cannot be effectively compressed, and if the rotation angle is too large, the belt may be damaged. In addition, these products are often used in harsh environments such as mud, sewage, and dust, which can easily cause early abnormal failure of the idler, seriously affecting the service life and reliability of the product. SUMMARY

[0003] The utility model aims at providing a precise adjustment full sealing idler to solve the problems of poor dust resistance and poor positioning accuracy in the prior art.

[0004] The utility model is realized by the following technical scheme: a precise adjustment full sealing idler, characterized by comprising a belt pulley, a base, a dust cover, and a bearing, wherein the bearing outer ring is interference-fitted with the inner wall of the belt pulley, the base is inserted into the bearing, the outer wall of the base is interference-fitted with the bearing inner ring, one side of the belt pulley is provided with a dust cover, the dust cover is in contact with the circumference of the belt pulley to achieve contact fixation and achieve full sealing dust prevention.

[0005] Further, one end of the base is provided with an end cover, and the end cover at one end of the base is gap-fitted with the side of the belt pulley without the dust cover to form a dust prevention structure.

[0006] Further, the end cover is integrally connected with the base.

[0007] Further, the precise adjustment full sealing idler is installed on an engine mounting bracket, and the base is bolted with the engine mounting bracket.

[0008] Further, an eccentric hole is arranged on the base, the eccentric hole is different in shaft from the rotating shaft of the belt pulley, and the base can rotate around the eccentric hole.

[0009] Further, the side of the base bolted with the engine mounting bracket is provided with a positioning pin, a plurality of positioning holes matched with the positioning pin are arranged on the engine mounting bracket, and the eccentric amount is adjusted by rotating the base to make the positioning pin matched with different positioning holes.

[0010] Further, a positioning scale line is arranged at the positioning hole.

[0011] The beneficial effects of the precise adjustment full-seal idler wheel include:

[0012] The precise control of the eccentric position of the idler wheel is realized: by designing the positioning pin on the bottom surface of the base, the eccentric position of the idler wheel can be precisely controlled, the idler wheel can be accurately positioned and pressed against the belt, the change of the belt is effectively adapted, and the problem of poor positioning accuracy in the prior art is solved.

[0013] The protection capability of the product is improved: the front end contact type full-seal dustproof structure is adopted, the invasion of external pollutants (such as mud, dust and the like) is effectively prevented, meanwhile, the small gap formed by the base and the belt wheel annular shoulder groove also realizes the rear end dustproof structure, so that the protection capability of the product is greatly improved, the working environment of the vulnerable bearing is optimized, and the service life of the product is prolonged.

[0014] It has the characteristics of small space and strong universality: the structure design of the present application is compact, the space occupation is small, and meanwhile, it has strong universality and can meet the installation needs of accessories of different sizes, and has wide applicability. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from the structure shown in the drawings without creative labor.

[0016] Fig. 1 It is a sectional view of a precise adjustment full-seal idler wheel;

[0017] Fig. 2 It is a schematic view of the positioning structure of a precise adjustment full-seal idler wheel;

[0018] In the figure, 1 is a belt wheel; 2 is a base; 3 is a dust cover; 4 is a bearing; 5 is a positioning pin; 6 is an eccentric hole. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] like Figs. 1-2 As shown, a precision-adjustable fully sealed idler pulley includes a pulley 1, a base 2, a dust cover 3, and a bearing 4. One end of the base 2 is fitted with an end cap. The outer ring of the bearing 4 is interference-fitted with the inner wall of the pulley 1. The base 2 is inserted into the bearing 4, and the outer wall of the base 2 is interference-fitted with the inner ring of the bearing 4. The end cap at one end of the base 2 is clearance-fitted with one side of the pulley 1 to form a dustproof structure. The other side of the pulley 1 is fitted with a dust cover 3, which makes circumferential contact with the pulley 1 to achieve contact fixation and achieve a fully sealed dustproof design.

[0022] The end cap of the base 2 is provided with a positioning pin 5 and an eccentric hole 6. The idler wheel is fixed to the engine mounting bracket through the eccentric hole 6. The engine mounting bracket is also provided with several positioning holes and positioning lines. The precise control of the eccentric position is achieved by the cooperation of the positioning pin 5 and the positioning holes.

[0023] The working principle of a precisely adjustable fully sealed idler wheel is as follows:

[0024] Pre-tighten base 2 to engine mounting bracket with screws. Rotate base 2 and rotate its positioning pin 5 to the required marked position on the mounting bracket. Then tighten the screws to achieve precise adjustment of the eccentric position and tighten the belt.

[0025] After the idler pulley is installed, the dust cover 3 is installed on the pulley 1, making it contact the circumference of the pulley 1 to achieve contact fixation and achieve a fully sealed dustproof structure, thus realizing the dustproof structure at the front end of the product. At the same time, the base 2 and the annular shoulder groove of the pulley 1 form a small gap, thereby realizing the dustproof structure at the rear end and preventing external pollutants (mud, dust) from entering from the front end.

[0026] The above embodiments describe the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Modifications and variations made by those skilled in the art without departing from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A precision-adjustable full-seal idler, characterized by, The precision adjustment full-sealing idler pulley comprises a belt pulley (1), a base (2), a dust cover (3) and a bearing (4), the outer ring of the bearing (4) is in interference fit with the inner wall of the belt pulley (1), the base (2) is inserted into the bearing (4), the outer wall of the base (2) is in interference fit with the inner ring of the bearing (4), one side of the belt pulley (1) is provided with the dust cover (3), the dust cover (3) is in contact with the circumference of the belt pulley (1) to realize contact fixation and achieve full-sealing dust prevention, an eccentric hole (6) is arranged on the base (2), the eccentric hole (6) is different from the rotating shaft of the belt pulley (1) in axis, the base (2) can rotate around the eccentric hole (6), a positioning pin (5) is arranged on the side of the base (2) which is bolted with the engine mounting bracket, a plurality of positioning holes matched with the positioning pin (5) are arranged on the engine mounting bracket, the positioning pin (5) is matched with different positioning holes by rotating the base (2) to adjust the eccentricity.

2. A precision-adjustment fully-sealed idler according to claim 1, characterized in that, The base (2) is provided with an end cover at one end, the end cover at one end of the base (2) is in gap fit with the side of the belt pulley (1) which is not provided with the dust cover (3) to form a dust prevention structure.

3. A precision-adjustment fully-sealed idler according to claim 2, characterized in that, The end cover is integrally connected with the base (2).

4. A precision-adjustment fully-sealed idler according to claim 3, characterized in that, The precision adjustment full-sealing idler pulley is mounted on the engine mounting bracket, the base (2) is bolted with the engine mounting bracket.

5. The precision-adjustment fully-sealed idler according to claim 1, wherein, Positioning lines are arranged at the positioning holes.

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