CN218522703U - Engine timing belt tensioning structure - Google Patents

Abstract

The utility model discloses an engine timing belt tensioning structure, belonging to the technical field of engine timing, in particular to a tensioning wheel with long service life; the method comprises the following steps: timing belt, camshaft band pulley, idler, bent axle band pulley, take-up pulley assembly, two sets of camshaft band pulley symmetry sets up, and camshaft band pulley and bent axle band pulley pass through timing belt transmission, all be equipped with the idler between camshaft band pulley and the bent axle band pulley, the idler supports to press and arranges in timing belt outer wall on, on the take-up pulley assembly laminating timing belt outer wall, the take-up pulley assembly includes take-up pulley body, connecting portion, tensioning axle, axle sleeve, end cover, the vertical upwards extension of connecting portion one end forms the tensioning axle, utilizes two springs simultaneous actions, and when one of them spring became invalid, another spring still continues work, can guarantee that the take-up pulley continues work, and end cover department is equipped with sealed the pad, can prevent that the dust from getting into, reduces the spring wearing and tearing, has improved life, convenient to use, and the reliability is high.

Description

Engine timing belt tensioning structure

Technical Field

The utility model relates to an engine belt tensioning structure in right time belongs to engine technical field in right time, especially relates to a long service life's take-up pulley.

Background

The tensioning wheel is an important part in a timing system, and has the functions of providing required tensioning force for a timing belt, avoiding tooth skipping of the timing belt and compensating elongation generated after the timing belt is worn and aged so as to ensure that the belt is in an optimal working state.

Publication No. CN206072266U discloses a tension pulley, which comprises a body mounted on the top of a support plate and a belt pulley mounted on the bottom of the support plate, wherein the support plate has a bending part, the bending part is located between the top of the support plate and the bottom of the support plate, a mounting flange is arranged in a cavity of the support plate, a spring is sleeved on the mounting flange, and a bracket and a damping member are also sleeved on the spring; the bracket and the damping piece are positioned at the opening at the top of the cavity body at the same time; the body lock joint is in the top of cavity and the one end fixed connection of arranging the centre bore axle sleeve in the center hole of mounting flange in, this take-up pulley bears the weight of the dynamic height, the security is higher and the extension board of take-up pulley is difficult to damage life longer when using for a long time, but when not solving long-time use, the spring inefficacy easily makes the unable laminating timing belt of take-up pulley, and the belt appears skidding to the lower problem of life.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pair of engine belt tensioning structure in right time can solve the long term use time, and the spring inefficacy easily makes the unable laminating belt in right time of take-up pulley, and the belt appears skidding to the lower problem of life.

The utility model discloses a solve above-mentioned problem, the technical scheme who proposes is: an engine timing belt tensioning structure comprising: the timing belt, the camshaft belt wheel, the idler, the crankshaft belt wheel and the tensioning wheel assembly are symmetrically arranged, the camshaft belt wheel and the crankshaft belt wheel are driven by the timing belt, the idler is arranged between the camshaft belt wheel and the crankshaft belt wheel and is pressed on the outer wall of the timing belt, the tensioning wheel assembly is attached to the outer wall of the timing belt, the tensioning wheel assembly comprises a tensioning wheel body, a connecting part, a tensioning shaft, a shaft sleeve and an end cover, one end of the connecting part vertically extends upwards to form the tensioning shaft, the tensioning wheel body is sleeved on the tensioning shaft, a bearing is arranged between the tensioning wheel body and the tensioning shaft, a limiting plate is arranged at the top of the tensioning shaft through a bolt in a screwed connection mode, the tensioning wheel body is arranged on the outer wall of the timing belt in a pressing mode, a through hole in the vertical direction is formed in the other end of the connecting portion, a shaft sleeve is arranged on the inner wall of the through hole, a lining is arranged between the shaft sleeve and the connecting portion, mounting cavities are formed in the connecting portions at two ends of the shaft sleeve, an annular structure is arranged in each mounting cavity, an opening is formed in the surface of each mounting cavity, a damping sleeve is arranged on the inner wall of each mounting cavity in a sleeved mode, an end cover is arranged at the opening, a through hole is formed in the center of the end cover, the through hole of the end cover corresponds to the through hole of the shaft sleeve to form a shaft hole, a sealing gasket is arranged between the end cover and the connecting portion, a spring is arranged between the end cover and the mounting cavity, one end of the torsion spring is fixedly arranged in each mounting cavity, the other end of the torsion spring is fixedly arranged on the end cover, and the two sets of the springs are symmetrically arranged;

the inner wall of the timing belt is provided with a synchronous tooth, and the synchronous tooth is matched with the camshaft belt wheel and the crankshaft belt wheel to form a synchronous structure;

the end cover is rotationally connected with the connecting part;

the diameter of the shaft sleeve is gradually increased from bottom to top;

a clamping block is arranged at the through hole of the end cover;

the end face of the end cover and the end face of the connecting part are in the same plane.

The utility model has the advantages that:

1. the two springs act simultaneously, when one spring fails, the other spring still continues to work, and the tension wheel can be ensured to continue to work;

2. the end cover is provided with the sealing gasket, so that dust can be prevented from entering, the abrasion of the spring is reduced, and the service life is prolonged;

3. convenient to use, the reliability is high.

Drawings

Fig. 1 is a front view of the engine timing belt tensioning structure of the present invention.

Fig. 2 is the utility model relates to an engine belt tensioning structure take-up pulley assembly in right time's structural schematic.

1. A timing belt; 2. a camshaft pulley; 3. an idler pulley; 4. a crankshaft pulley; 5. a tension pulley assembly; 6. a tension wheel body; 7. a bolt; 8. tensioning the shaft; 9. a connecting portion; 10. an end cap; 11. a shaft hole; 12. a gasket; 13. a spring; 14. a bushing; 15. a shaft sleeve; 16. a mounting cavity; 17. a damping sleeve.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

It should be noted that as used in the following description, the terms "front", "back", "left", "right", "upper" and "lower" refer to directions in fig. 1, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

According to the illustrations of FIGS. 1-2: the utility model provides a 1 straining structure of engine timing belt includes: the timing belt comprises a timing belt 1, camshaft belt wheels 2, idler wheels 3, crankshaft belt wheels 4 and a tensioning wheel assembly 5, wherein the camshaft belt wheels 2 are arranged on a camshaft, the crankshaft belt wheels 4 are arranged on a crankshaft, the two groups of camshaft belt wheels 2 are symmetrically arranged, the camshaft belt wheels 2 and the crankshaft belt wheels 4 are driven through the timing belt 1, the idler wheels 3 are arranged between the camshaft belt wheels 2 and the crankshaft belt wheels 4, the idler wheels 3 are rotatably connected to and arranged on an engine shell, the idler wheels 3 are pressed on the outer wall of the timing belt 1, and the tensioning wheel assembly 5 is attached to the outer wall of the timing belt 1;

the tensioning wheel assembly 5 comprises a tensioning wheel body, a connecting part 9, a tensioning shaft 8, a shaft sleeve 15 and an end cover 10, wherein one end of the connecting part 9 extends vertically upwards to form the tensioning shaft 8, the tensioning wheel body is sleeved on the tensioning shaft 8, a bearing is arranged between the tensioning wheel body and the tensioning shaft 8, a limiting plate is arranged at the top of the tensioning shaft 8 through a bolt 7 in a screwed mode, a through hole in the vertical direction is formed in the other end of the connecting part 9, the shaft sleeve 15 is arranged on the inner wall of the through hole, a lining 14 is arranged between the shaft sleeve 15 and the connecting part 9, the connecting parts 9 at two ends of the shaft sleeve 15 are both provided with mounting cavities 16, an annular structure is arranged in each mounting cavity 16, the surfaces of the mounting cavities 16 are provided with openings, a damping sleeve 17 is sleeved on the inner wall of each mounting cavity 16, the end cover 10 is arranged at the opening, a through hole in the center of the end cover 10 corresponds to the through hole of the shaft sleeve 15 to form a shaft hole 11, a center shaft hole in the surface of an engine, a sealing gasket 12 is arranged between the end cover 10 and the connecting part 9, springs 13 are arranged between the end cover 10, springs 13 are arranged symmetrically;

the inner wall of the timing belt 1 is provided with synchronous teeth, and the synchronous teeth are matched with a camshaft belt pulley 2 and a crankshaft belt pulley 4 to form a synchronous structure;

the end cover 10 is rotationally connected with the connecting part 9, so that the end cover 10 and the connecting part 9 rotate to compress the spring 13;

the diameter of the shaft sleeve 15 is gradually increased from bottom to top;

a clamping block is arranged at the through hole of the end cover 10, so that the middle shaft is fixed with the end cover 10, and the two ends of the spring 13 can generate torsion conveniently;

the end surface of the end cover 10 and the end surface of the connecting part 9 are in the same plane.

The principle of the utility model is as follows: when the timing belt type engine is used, a crankshaft of the engine rotates, the timing belt 1 drives the crankshaft belt wheel 4 and the camshaft belt wheel 2 synchronously, so that a synchronous structure of the crankshaft and the camshaft is realized, the end cover 10 and the middle shaft are fixed, the sealing gasket 12 is arranged at the position of the end cover 10, dust can be prevented from entering, the abrasion of the springs 13 is reduced, the service life is prolonged, and the end cover 10 is rotatably connected with the connecting part 9, so that torsion is generated at two ends of the springs 13, when the engine accelerates, the timing belt 1 is stretched under the action of tension, the torsion of the springs 13 drives the connecting part 9 to rotate around the middle shaft, so that the timing belt 1 is tightly pressed by a tensioning wheel body, the tensioning force of the timing belt 1 is ensured, when one of the springs 13 fails, the other spring 13 still works, the tensioning wheel body can be ensured to tightly press the timing belt 1, and the purpose of high reliability can be achieved by utilizing the two springs 13 to act simultaneously, when one of the springs 13 fails, the other spring 13 still continues to work, and the tensioning wheel can be ensured to continue to work.

The present invention and the embodiments thereof have been described above, but the description is not limited thereto, and the embodiment shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should understand that they should not be limited to the embodiments described above, and that they can design the similar structure and embodiments without departing from the spirit of the invention.

Claims (6)

1. An engine timing belt tensioning structure which characterized in that: comprises a timing belt (1), a camshaft belt wheel (2), an idler (3), a crankshaft belt wheel (4) and a tension pulley assembly (5), wherein two groups of camshaft belt wheels (2) are symmetrically arranged, the camshaft belt wheel (2) and the crankshaft belt wheel (4) are driven by the timing belt (1), the idler (3) is arranged between the camshaft belt wheel (2) and the crankshaft belt wheel (4), the idler (3) is pressed on the outer wall of the timing belt (1), the tension pulley assembly (5) is attached to the outer wall of the timing belt (1), the tension pulley assembly (5) comprises a tension pulley body (6), a connecting part (9), a tension shaft (8), a shaft sleeve (15) and an end cover (10), one end of the connecting part (9) vertically extends upwards to form the tension shaft (8), the tension pulley body is sleeved on the tension shaft (8), a bearing is arranged between the tension pulley body and the tension shaft (8), a limiting plate is arranged at the top of the tension shaft (8) through a bolt (7) in a threaded manner, the connecting part (14) is arranged at the other end of the connecting part (9) on the outer wall of the timing belt (1), a through hole in the shaft sleeve (15) is arranged between the inner wall of the shaft sleeve (15), and a connecting part (14) is arranged between the connecting part between the tension pulley (9) and a bushing sleeve (15) and a bushing (14) arranged at two ends of the bushing (15), annular structure in installation cavity (16), installation cavity (16) surface is seted up uncovered, and damping cover (17) cover is arranged in on installation cavity (16) inner wall, and opening department is arranged in end cover (10), and end cover (10) central point puts and sets up the through hole, and the through hole of end cover (10) corresponds with axle sleeve (15) through-hole and forms shaft hole (11), is equipped with sealed pad (12) between end cover (10) and connecting portion (9), is equipped with spring (13) between end cover (10) and installation cavity (16), spring (13) are the torsional spring, and torsional spring one end is fixed to be arranged in installation cavity (16), and the torsional spring other end is fixed to be arranged in on end cover (10), two sets of spring (13) symmetry sets up.

2. An engine timing belt tensioning structure as defined in claim 1, wherein: the timing belt (1) inner wall is equipped with synchronous tooth, synchronous tooth and camshaft band pulley (2) and crankshaft band pulley (4) cooperation formation synchronization structure.

3. An engine timing belt tensioning structure as defined in claim 1, wherein: the end cover (10) is rotationally connected with the connecting part (9).

4. An engine timing belt tensioning structure as defined in claim 1, wherein: the diameter of the shaft sleeve (15) is gradually increased from bottom to top.

5. An engine timing belt tensioning structure as defined in claim 1, wherein: and a clamping block is arranged at the through hole of the end cover (10).

6. An engine timing belt tensioning structure as defined in claim 1, wherein: the end face of the end cover (10) and the end face of the connecting part (9) are in the same plane.

Images