CN216555186U

CN216555186U - Variable arm length accessory tensioner

Info

Publication number: CN216555186U
Application number: CN202123063056.6U
Authority: CN
Inventors: 蒋浩澜
Original assignee: Gates Unitta Power Transmission Shanghai Ltd
Current assignee: Gates Unitta Power Transmission Shanghai Ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2022-05-17
Anticipated expiration: 2031-12-08

Abstract

The creation discloses a variable arm length annex tensioning ware, including the base, set up in base one end and can be around the relative base wobbling swing arm of axis, set up between swing arm and base and be used for deflecting the swing arm and make it have towards the specific direction elastic element who deflects the trend, set up at the swing arm other end and can be around the rotatory band pulley subassembly of rotation axis, it includes band pulley, bearing, the band pulley subassembly passes through mounting bolt and assembles to the swing arm, the swing arm includes a waist type hole that supplies mounting bolt to pass, the band pulley subassembly sets up in axial one side of swing arm, and swing arm axial opposite side is provided with the grip block with mounting bolt is connected, mounting bolt passes the band pulley from swing arm one side, assembles the band pulley subassembly to the swing arm. Through this waist type hole, be convenient for adjust the distance of band pulley and swing arm swing axis when the experimental stage of tensioning ware adaptation engine, shortened test period, practiced thrift the cost.

Description

Variable arm length accessory tensioner

Technical Field

The present invention relates to a variable arm length accessory tensioner, and more particularly to a variable arm length accessory tensioner for use in an engine accessory drive system.

Background

Currently, in some internal combustion engine accessory drive systems, accessory tensioners are provided to tension the drive. It generally comprises a base, a swing arm arranged on the base and able to swing around a fixed axis, a pulley arranged on the swing arm, far from the swing axis of the swing arm, said pulley rotating around its own axis of rotation. It is common to provide circular bolt holes in the swing arm and to assemble the pulley to the swing arm via the bolts. So far, the distance between the rotation axis of the belt wheel and the swing axis of the swing arm is fixed. In some different system designs, the required tensioner arm length is closer, but the testing stage requires additional development of a completely new tensioner, and therefore the development cost of the tensioner for different systems is higher.

It is therefore desirable to design a new variable arm length attachment tensioner to meet the needs of different systems.

SUMMERY OF THE UTILITY MODEL

The technical problem that this creation is to solve is to provide a new variable arm length accessory tensioner.

In order to solve the technical problem, the creation provides an arm length variable accessory tensioner, which comprises a base, a swing arm, an elastic element and a belt wheel assembly, wherein the swing arm is arranged at one end of the base and can swing around an axis relative to the base, the elastic element is arranged between the swing arm and the base and used for deflecting the swing arm to enable the swing arm to have a deflection trend towards a specific direction, the belt wheel assembly is arranged at the other end of the swing arm and can rotate around a rotation axis, the belt wheel assembly comprises a belt wheel and a bearing, the belt wheel assembly is assembled to the swing arm through a mounting bolt, the swing arm comprises a waist-shaped hole for the mounting bolt to pass through, the belt wheel assembly is arranged on one axial side of the swing arm, the other axial side of the swing arm is provided with a clamping block connected with the mounting bolt, the mounting bolt passes through the belt wheel from one side of the swing arm, and the belt wheel assembly is assembled to the swing arm.

The beneficial effect of this creation lies in: through setting up a waist type hole at the swing arm, the distance of band pulley and swing arm swing axis can be adjusted, and then the different systems of tensioning ware adaptation are more convenient, and the adjustment of this distance when the experimental stage of tensioning ware adaptation engine is particularly convenient for has shortened experimental period, has practiced thrift the cost.

Drawings

FIG. 1 is a schematic cross-sectional view of the present variable arm length attachment tensioner.

Detailed Description

The present invention will be described more fully hereinafter with reference to fig. 1 of the drawings.

A variable arm length accessory tensioner comprising a base 11, the base 11 being normally secured to an engine or bracket or the like to which the tensioner is secured; the swing arm 12 is arranged on the base 11 and one end of the swing arm can swing around an axis, the swing arm 12 usually rotates around a rotating shaft, the rotating shaft can be a bolt or a component, a friction reducing piece 13, such as a plastic bush made of Teflon, is usually arranged between the swing arm 12 and the rotating shaft, and the swing arm 12 comprises a kidney-shaped hole 17 for the installation bolt to pass through; the swing arm device further comprises an elastic element 15 which is arranged between the swing arm 12 and the base 11 and used for deflecting the swing arm 12 and enabling the swing arm 12 to have a tendency of deflecting towards a specific direction, wherein the common elastic element 15 is a torsion spring, a belt spring and the like; a damper 14 is also typically provided between the swing arm 12 and the base 11 to dampen the swinging motion of the swing arm 12. Preferably, the damping member 14 is tightly abutted against the swing arm 12 or the base 11 through the action of the elastic element 15, and generates a damping force by friction with the swing arm 12 or the base 11 during the swing process of the swing arm 12; the belt wheel assembly is arranged on one axial side of the swing arm 12, a clamping block 4 connected with a mounting bolt 51 is arranged on the other axial side of the swing arm 12, the mounting bolt 51 penetrates through the belt wheel 21 from one side of the swing arm 12 and is locked with a nut 52 on the other side of the swing arm 12, and the belt wheel assembly is rotatably assembled to the swing arm 12. In other embodiments, the nut may be omitted and the mounting bolt 51 may be threaded into a hole in the clamp block 4 through which the mounting bolt 51 passes, and the pulley assembly may be rotatably mounted to the swing arm 12 by the mounting bolt 51 engaging the threads of the clamp block 4.

In some embodiments, the surface of the clamping block 4 facing the swing arm 12 is provided with a corrugated surface 41, and the surface of the swing arm 12 corresponding to the clamping block 4 is also provided with a corrugated surface 16.

In another alternative, the surface of the pulley assembly facing the swing arm 12 is provided with a corrugated surface, and the surface of the swing arm 12 corresponding to the pulley assembly is also provided with a corrugated surface. Preferably, the pulley assembly comprises a supporting block 3, the supporting block 3 is provided with a circular hole 31 for the mounting bolt 51 to pass through, one end surface of the supporting block is supported on the inner ring of the bearing 22, the other end surface is supported on the swing arm 12, and the corrugated surface is arranged on the supporting block 3.

The corrugated surface may be uniform corrugations with a pitch of 1-2 mm. The two corrugated surfaces cooperate to make the cooperation of the clamping block 4 or the belt wheel assembly and the swing arm 12 more stable. And the uniform and fixed pitch corrugated surface enables the length adjustment of the belt wheel assembly and the swing arm 12 to be more standard and predictable.

Preferably, the direction of extension of the corrugations is perpendicular to the line between the axis of rotation of the pulley and the axis of oscillation of the oscillating arm 12. In other ways, the direction of extension of the corrugations may be angled from the line connecting the axis of rotation of the pulley and the axis of oscillation of the swing arm 12, allowing for more versatile adjustment of the pulley assembly during movement of the pulley assembly. The angle may be any angle between 30-60 degrees, preferably 45 degrees may be selected.

Through setting up a waist type hole 17 at swing arm 12, the distance of band pulley and swing arm 12 swing axis can be adjusted, then the different systems of tensioning ware adaptation are more convenient, and especially be convenient for adjust this distance when the experimental stage of tensioning ware adaptation engine, shortened experimental period, practiced thrift the cost.

The technical solutions described above are only for illustrating the embodiments of the present disclosure, and are not limiting on the present disclosure, and equivalent changes made by those skilled in the art according to the present disclosure are all within the protection scope of the present disclosure.

Claims

1. The arm length variable accessory tensioner is characterized in that the swing arm comprises a waist-shaped hole for a mounting bolt to pass through, the belt wheel assembly is arranged on one axial side of the swing arm, a clamping block connected with the mounting bolt is arranged on the other axial side of the swing arm, the mounting bolt penetrates through the belt wheel from one side of the swing arm, and the belt wheel assembly is fixed to the swing arm.

2. The variable arm length attachment tensioner as claimed in claim 1, wherein: the surface of the clamping block facing the swing arm is provided with a corrugated surface, and the surface of the swing arm corresponding to the clamping block is also provided with a corrugated surface.

3. The variable arm length attachment tensioner as claimed in claim 1, wherein: the surface of the belt wheel assembly facing the swing arm is provided with a corrugated surface, and the surface of the swing arm corresponding to the belt wheel assembly is also provided with a corrugated surface.

4. The variable arm length attachment tensioner as claimed in claim 2 or 3, wherein: the corrugated surface is provided with uniform corrugations with a pitch of 1-2 mm.

5. The variable arm length attachment tensioner as claimed in claim 2 or 3, wherein: the extending direction of the corrugation of the corrugated surface is perpendicular to a connecting line of the rotation axis of the belt wheel and the swing axis of the swing arm.

6. The variable arm length attachment tensioner as claimed in claim 2, wherein: the belt wheel component comprises a supporting block, one end face of the supporting block is supported on the inner ring of the bearing, and the other end face of the supporting block is supported on the swing arm.

7. The variable arm length attachment tensioner as claimed in claim 3, wherein: the belt wheel assembly comprises a supporting block, one end face of the supporting block is supported on the inner ring of the bearing, the other end face of the supporting block is supported on the swing arm, and the corrugated surface is arranged on the supporting block.

8. The variable arm length attachment tensioner as claimed in claim 2 or 3, wherein: the corrugation extending direction of the corrugated surface and a line connecting the rotation axis of the belt wheel and the swing axis of the swing arm form an angle which is any angle between 30 and 60 degrees.

9. The variable arm length attachment tensioner as claimed in claim 1, wherein: the swing arm opposite side sets up nut or screwed grip block and mounting bolt cooperation in order to assemble the pulley subassembly.

10. The variable arm length attachment tensioner as claimed in claim 1, wherein: and a damping part for buffering the swing of the swing arm is also arranged between the swing arm and the base.