WO2015200314A1 - Tensioner with overmolded pivot arm - Google Patents

Tensioner with overmolded pivot arm Download PDF

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Publication number
WO2015200314A1
WO2015200314A1 PCT/US2015/037166 US2015037166W WO2015200314A1 WO 2015200314 A1 WO2015200314 A1 WO 2015200314A1 US 2015037166 W US2015037166 W US 2015037166W WO 2015200314 A1 WO2015200314 A1 WO 2015200314A1
Authority
WO
WIPO (PCT)
Prior art keywords
pivot arm
shaft
tensioner
base
overmolded
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2015/037166
Other languages
French (fr)
Inventor
Devang Sisodia
Muthukaruppan Eswaran
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gates Corp
Original Assignee
Gates Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gates Corp filed Critical Gates Corp
Publication of WO2015200314A1 publication Critical patent/WO2015200314A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes or chains 
    • F16H7/10—Means for varying tension of belts, ropes or chains  by adjusting the axis of a pulley
    • F16H7/12—Means for varying tension of belts, ropes or chains  by adjusting the axis of a pulley of an idle pulley
    • F16H7/1209—Means for varying tension of belts, ropes or chains  by adjusting the axis of a pulley of an idle pulley with vibration damping means
    • F16H7/1218—Means for varying tension of belts, ropes or chains  by adjusting the axis of a pulley of an idle pulley with vibration damping means of the dry friction type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes or chains 
    • F16H7/10—Means for varying tension of belts, ropes or chains  by adjusting the axis of a pulley
    • F16H7/12—Means for varying tension of belts, ropes or chains  by adjusting the axis of a pulley of an idle pulley
    • F16H7/1209—Means for varying tension of belts, ropes or chains  by adjusting the axis of a pulley of an idle pulley with vibration damping means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes or chains 
    • F16H7/10—Means for varying tension of belts, ropes or chains  by adjusting the axis of a pulley
    • F16H7/14—Means for varying tension of belts, ropes or chains  by adjusting the axis of a pulley of a driving or driven pulley
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes or chains 
    • F16H2007/0802—Actuators for final output members
    • F16H2007/081—Torsion springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes or chains 
    • F16H2007/0863—Finally actuated members, e.g. constructional details thereof
    • F16H2007/0865—Pulleys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes or chains 
    • F16H2007/0876—Control or adjustment of actuators
    • F16H2007/0878—Disabling during transport
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes or chains 
    • F16H2007/0889—Path of movement of the finally actuated member
    • F16H2007/0893—Circular path

Definitions

  • the invention relates to a tensioner, and more particularly, to a tensioner having a shaft with an overmolded pivot arm.
  • Tensioners are used to apply a preload to belts used in engine accessory drives.
  • a tensioner will typically comprise a pivot arm mounted to a base.
  • a spring between the pivot arm and base urges the pivot arm, and a pulley journalled thereto, into engagement with a belt. This will apply a preload to the belt which assures proper power transmission from the belt to a driven accessory such as an alternator.
  • the tensioner pivot arm comprises a pivot shaft and arm.
  • the pivot shaft can be press fit into the pivot arm or the combined shaft and pivot arm are cast as a monolithic piece.
  • a press fit pivot shaft can be prone to becoming misaligned. This is due to a bending moment which is applied to the shaft during operation. Misalignment of the shaft within the arm can lead to premature failure of the tensioner.
  • overmolding is a process of casting a first material into a predetermined form about a second component.
  • the casting material can either be similar or dissimilar from the receiving component.
  • US patent no. 6895700 discloses a soleplate for a clothes pressing iron, composed of: a metal sheet having a lower surface that will be directed toward fabrics to be ironed, a lower surface layer that extends form the lower surface and an interior region that is separated from the lower surface by the lower surface layer, the lower surface layer being mechanically hammer-hardened, or work hardened, to have a hardness greater than the hardness of the sheet prior to being mechanically hardened; and a coating that is hard and resistant to scratching covering the lower surface.
  • the primary aspect of the invention is to provide a tensioner having a steel shaft with an overmolded cast aluminum pivot arm.
  • the invention comprises a tensioner comprising a base, a pivot arm comprising cast aluminum, a spring disposed between the base and the pivot arm for urging the pivot arm, a pulley journalled to the pivot arm, a steel shaft overmolded within the pivot arm, the shaft pivotally engaged with the base, the shaft comprising a waist portion for connecting to the overmolded pivot arm, and a pin releasably engaged between the pivot arm and the base.
  • Figure 1 is a bottom perspective view of the tensioner pivot arm.
  • Figure 2 is a top perspective view of the tensioner pivot arm.
  • Figure 3 is a top plan view of the tensioner pivot arm.
  • Figure 4 is a side cross-sectional view of the tensioner pivot arm.
  • Figure 5 is a perspective view of the pivot arm shaft .
  • Figure 6 is a cross-sectional view of the pivot arm shaft .
  • Figure 7 is a perspective view of the tensioner.
  • Figure 8 is a cross-sectional view of the tensioner.
  • FIG. 1 is a bottom perspective view of the tensioner pivot arm.
  • the tensioner pivot arm 100 comprises pivot arm shaft 101. Shaft 101 is overmolded into pivot arm body 102.
  • Portion 103 cooperatively engages a tensioner base 104. Portion 103 cooperatively engages a pulley 105. Shaft 101 pivotally engages base 104. Spring 114 butts against damping stop 117. Damping stop 117 also reinforces the overmold joint 107 with shaft 101, see Fig. 4. Damping member 116 bears upon damping stop 117, which damping stop is molded into the pivot arm. Damping member 116 has a frictional engagement with base 104 whereby a pivot arm oscillation is damped.
  • Figure 2 is a top perspective view of the tensioner pivot arm.
  • a fastener engages receiver 105, thereby fastening a pulley 105 to the pivot arm 102.
  • Figure 3 is a top plan view of the tensioner pivot arm.
  • a tool receiving portion 106 can be engaged by a tool (not shown) for adjusting the tensioner when installed with a belt (not shown) .
  • a suitable tool may comprise a ratchet socket, pliers or wrench .
  • Figure 4 is a side cross-sectional view of the tensioner pivot arm.
  • Shaft 101 is overmolded into pivot arm 102.
  • Overmold joint portion 107 is molded around portion 108 of shaft 101.
  • the pivot arm material comprises cast aluminum, for example, die cast JIS ADC12 aluminum.
  • Shaft 101 comprises steel, for example, SAE J403 1018 steel.
  • the materials specified are offered as examples and are not intended to limit the scope or function of the invention. Any other metal or material possessing similar physical properties will perform with equal success.
  • the limiting aspect being that the melt temperature of the shaft must be greater than the melt temperature of the overmold cast material.
  • a shaft is typically press fit into the pivot arm.
  • the press fit design can cause the damping shoe to tilt unacceptably over time, thereby degrading alignment and performance. This in turn may cause shaft 101 to bend. Further, the hole may elongate and the pivot arm ultimately fails by separating from the shaft .
  • the inventive overmolded design corrects the damping shoe tilting problem. Correction of damping shoe tilt ensures stable alignment for a greater duration of operation. Further, by use of overmolding it is possible to maintain better perpendicularity between shaft and arm during manufacturing. During assembly the final alignment of the tensioner assembly will typically fall within 0.5 degree.
  • FIG. 5 is a perspective view of the pivot arm shaft.
  • Portion 108 comprises a waist portion 109.
  • Waist portion 109 comprises an arcuate form wherein the diameter of shaft 101 is reduced to approximately 70% of the shaft overall diameter. Waist portion 109 provides means for the overmolded arm to mechanically grip shaft 101. Mechanical engagement enhances shaft 101 resistance to pull-out from pivot arm 102.
  • Waist portion 109 may comprise any profile compatible with the desired connection between the shaft and pivot arm, such as arcuate, angular or grooved. An arcuate form is depicted in Figure 5.
  • FIG. 6 is a cross-sectional view of the pivot arm shaft. Hole 110 receives a fastener.
  • FIG. 7 is a perspective view of the tensioner.
  • Pivot arm 102 is pivotally engaged with base 104.
  • Lock pin 112 engages portion 118 in base 104.
  • Lock pin 112 engages pivot arm 102 at portion 119 to hold the pivot arm in a "ready" position during installation. In the ready position spring 114 is preloaded. Once a belt (not shown) is engaged with the pulley 105, lock pin 112 is removed thereby allowing pivot arm 102 and pulley 105 to pivot into a loaded engagement with the belt.
  • FIG 8 is a cross-sectional view of the tensioner.
  • Dust cover 111 prevents debris from contaminating bearing 115.
  • Fastener 113 retains bearing 115 on portion 103.
  • Torsion spring 114 is disposed between base 104 and pivot arm 102. Torsion spring 114 urges pivot arm 102 into engagement with a belt. Damping member 116 damps movement of pivot arm 102 by frictional engagement with base 104.
  • Fastener 120 engages shaft 101 to pivotally connect pivot arm 102 to base 104.
  • the overmolded design corrects a damping shoe tilting problem for the reasons given and also because the damping stop feature on the cast arm provides the required support for proper seating of the shoe.
  • the damping stop is a part of the overmolded joint 107 with shaft 101.
  • the overmolded joint can withstand more bending moment than a prior press fit joint. This is advantageous because it is not desirable to package a thicker arm in the available space. For a press fit joint it would be necessary to increase the arm thickness (" ⁇ " see Fig. 4) by nearly twice to make an equivalent joint strength compared to the inventive overmolded joint. Increasing the arm thickness T would also have the effect of reducing spring height "H" which would tend to make the spring stiffer. This in turn would adversely affect tension control in a belt drive system.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

A tensioner comprising a base, a pivot arm comprising cast aluminum, a spring disposed between the base and the pivot arm for urging the pivot arm, a pulley journalled to the pivot arm, a steel shaft overmolded within the pivot arm, the shaft pivotally engaged with the base, the shaft comprising a waist portion for connecting to the overmolded pivot arm, and a pin releasably engaged between the pivot arm and the base.

Description

Title
Tensioner with Overmolded Pivot Arm Field of the Invention
The invention relates to a tensioner, and more particularly, to a tensioner having a shaft with an overmolded pivot arm. Background of the Invention
Tensioners are used to apply a preload to belts used in engine accessory drives. A tensioner will typically comprise a pivot arm mounted to a base. A spring between the pivot arm and base urges the pivot arm, and a pulley journalled thereto, into engagement with a belt. This will apply a preload to the belt which assures proper power transmission from the belt to a driven accessory such as an alternator.
The tensioner pivot arm comprises a pivot shaft and arm. The pivot shaft can be press fit into the pivot arm or the combined shaft and pivot arm are cast as a monolithic piece.
A press fit pivot shaft can be prone to becoming misaligned. This is due to a bending moment which is applied to the shaft during operation. Misalignment of the shaft within the arm can lead to premature failure of the tensioner.
For manufacture, overmolding is a process of casting a first material into a predetermined form about a second component. The casting material can either be similar or dissimilar from the receiving component.
Representative of the art is US patent no. 6895700 which discloses a soleplate for a clothes pressing iron, composed of: a metal sheet having a lower surface that will be directed toward fabrics to be ironed, a lower surface layer that extends form the lower surface and an interior region that is separated from the lower surface by the lower surface layer, the lower surface layer being mechanically hammer-hardened, or work hardened, to have a hardness greater than the hardness of the sheet prior to being mechanically hardened; and a coating that is hard and resistant to scratching covering the lower surface.
What is needed is a tensioner having a steel shaft with an overmolded cast aluminum pivot arm. The present invention meets this need.
Summary of the Invention
The primary aspect of the invention is to provide a tensioner having a steel shaft with an overmolded cast aluminum pivot arm.
Other aspects of the invention will be pointed out or made obvious by the following description of the invention and the accompanying drawings.
The invention comprises a tensioner comprising a base, a pivot arm comprising cast aluminum, a spring disposed between the base and the pivot arm for urging the pivot arm, a pulley journalled to the pivot arm, a steel shaft overmolded within the pivot arm, the shaft pivotally engaged with the base, the shaft comprising a waist portion for connecting to the overmolded pivot arm, and a pin releasably engaged between the pivot arm and the base. Brief Description of the Drawings
The accompanying drawings, which are incorporated in and form a part of the specification, illustrate preferred embodiments of the present invention, and together with a description, serve to explain the principles of the invention.
Figure 1 is a bottom perspective view of the tensioner pivot arm.
Figure 2 is a top perspective view of the tensioner pivot arm.
Figure 3 is a top plan view of the tensioner pivot arm.
Figure 4 is a side cross-sectional view of the tensioner pivot arm.
Figure 5 is a perspective view of the pivot arm shaft .
Figure 6 is a cross-sectional view of the pivot arm shaft .
Figure 7 is a perspective view of the tensioner.
Figure 8 is a cross-sectional view of the tensioner.
Detailed Description of the Preferred Embodiment
Figure 1 is a bottom perspective view of the tensioner pivot arm. The tensioner pivot arm 100 comprises pivot arm shaft 101. Shaft 101 is overmolded into pivot arm body 102.
Portion 103 cooperatively engages a tensioner base 104. Portion 103 cooperatively engages a pulley 105. Shaft 101 pivotally engages base 104. Spring 114 butts against damping stop 117. Damping stop 117 also reinforces the overmold joint 107 with shaft 101, see Fig. 4. Damping member 116 bears upon damping stop 117, which damping stop is molded into the pivot arm. Damping member 116 has a frictional engagement with base 104 whereby a pivot arm oscillation is damped.
Figure 2 is a top perspective view of the tensioner pivot arm. A fastener engages receiver 105, thereby fastening a pulley 105 to the pivot arm 102. Figure 3 is a top plan view of the tensioner pivot arm. A tool receiving portion 106 can be engaged by a tool (not shown) for adjusting the tensioner when installed with a belt (not shown) . For example, a suitable tool may comprise a ratchet socket, pliers or wrench .
Figure 4 is a side cross-sectional view of the tensioner pivot arm. Shaft 101 is overmolded into pivot arm 102. Overmold joint portion 107 is molded around portion 108 of shaft 101. For the instant embodiment the pivot arm material comprises cast aluminum, for example, die cast JIS ADC12 aluminum. Shaft 101 comprises steel, for example, SAE J403 1018 steel. The materials specified are offered as examples and are not intended to limit the scope or function of the invention. Any other metal or material possessing similar physical properties will perform with equal success. The limiting aspect being that the melt temperature of the shaft must be greater than the melt temperature of the overmold cast material.
In the prior art, a shaft is typically press fit into the pivot arm. The press fit design can cause the damping shoe to tilt unacceptably over time, thereby degrading alignment and performance. This in turn may cause shaft 101 to bend. Further, the hole may elongate and the pivot arm ultimately fails by separating from the shaft .
The inventive overmolded design corrects the damping shoe tilting problem. Correction of damping shoe tilt ensures stable alignment for a greater duration of operation. Further, by use of overmolding it is possible to maintain better perpendicularity between shaft and arm during manufacturing. During assembly the final alignment of the tensioner assembly will typically fall within 0.5 degree.
As noted, when the alignment of the tensioner deteriorates, the bending moment on the shaft increases which causes stress on the joint with the pivot arm. If hoop stress resistance in the joint is not adequate then the joint may loosen. During testing of the overmolded joint the cast pivot arm will usually fracture at the limit, but the shaft does not come out of the pivot arm hole. For example, facture may occur at about 12,000 Newtons to 15,000 Newtons for the inventive pivot arm configuration. On the other hand, in a prior art press fit joint the shaft may slip out of the pivot arm hole at approximately 6,000 Newtons.
Figure 5 is a perspective view of the pivot arm shaft. Portion 108 comprises a waist portion 109. Waist portion 109 comprises an arcuate form wherein the diameter of shaft 101 is reduced to approximately 70% of the shaft overall diameter. Waist portion 109 provides means for the overmolded arm to mechanically grip shaft 101. Mechanical engagement enhances shaft 101 resistance to pull-out from pivot arm 102. Waist portion 109 may comprise any profile compatible with the desired connection between the shaft and pivot arm, such as arcuate, angular or grooved. An arcuate form is depicted in Figure 5.
Figure 6 is a cross-sectional view of the pivot arm shaft. Hole 110 receives a fastener.
Figure 7 is a perspective view of the tensioner. Pivot arm 102 is pivotally engaged with base 104. Lock pin 112 engages portion 118 in base 104. Lock pin 112 engages pivot arm 102 at portion 119 to hold the pivot arm in a "ready" position during installation. In the ready position spring 114 is preloaded. Once a belt (not shown) is engaged with the pulley 105, lock pin 112 is removed thereby allowing pivot arm 102 and pulley 105 to pivot into a loaded engagement with the belt.
Figure 8 is a cross-sectional view of the tensioner. Dust cover 111 prevents debris from contaminating bearing 115. Fastener 113 retains bearing 115 on portion 103. Torsion spring 114 is disposed between base 104 and pivot arm 102. Torsion spring 114 urges pivot arm 102 into engagement with a belt. Damping member 116 damps movement of pivot arm 102 by frictional engagement with base 104. Fastener 120 engages shaft 101 to pivotally connect pivot arm 102 to base 104.
The overmolded design corrects a damping shoe tilting problem for the reasons given and also because the damping stop feature on the cast arm provides the required support for proper seating of the shoe. The damping stop is a part of the overmolded joint 107 with shaft 101. The overmolded joint can withstand more bending moment than a prior press fit joint. This is advantageous because it is not desirable to package a thicker arm in the available space. For a press fit joint it would be necessary to increase the arm thickness ("τ" see Fig. 4) by nearly twice to make an equivalent joint strength compared to the inventive overmolded joint. Increasing the arm thickness T would also have the effect of reducing spring height "H" which would tend to make the spring stiffer. This in turn would adversely affect tension control in a belt drive system.
Although forms of the invention have been described herein, it will be obvious to those skilled in the art that variations may be made in the construction and relation of parts and method without departing from the spirit and scope of the invention described herein.

Claims

Claims I claim:
1. A tensioner comprising:
a base (104) ;
a pivot arm (102) comprising cast aluminum;
a spring (114) disposed between the base and the pivot arm for urging the pivot arm;
a pulley (105) journalled to the pivot arm;
a steel shaft (101) overmolded within the pivot arm, the shaft pivotally engaged with the base;
the shaft comprising a waist portion (109) for connecting to the overmolded pivot arm; and
a pin (112) releasably engaged between the pivot arm and the base.
2. The tensioner as in claim 1, wherein the waist portion is arcuate.
3. The tensioner as in claim 1, wherein the spring comprises a torsion spring.
4. The tensioner as in claim 1 further comprising:
a damping member having a frictional engagement with the base; and
the damping member bearing upon a damping stop molded into the pivot arm.
PCT/US2015/037166 2014-06-24 2015-06-23 Tensioner with overmolded pivot arm Ceased WO2015200314A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14/312,929 2014-06-24
US14/312,929 US20150369346A1 (en) 2014-06-24 2014-06-24 Tensioner With Overmolded Pivot Arm

Publications (1)

Publication Number Publication Date
WO2015200314A1 true WO2015200314A1 (en) 2015-12-30

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PCT/US2015/037166 Ceased WO2015200314A1 (en) 2014-06-24 2015-06-23 Tensioner with overmolded pivot arm

Country Status (2)

Country Link
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WO (1) WO2015200314A1 (en)

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JP6659454B2 (en) * 2016-05-13 2020-03-04 Ntn株式会社 Auto tensioner
DE102016221797B4 (en) * 2016-11-08 2020-03-26 Schaeffler Technologies AG & Co. KG Jig
US10328540B2 (en) * 2017-08-13 2019-06-25 Kingsand Machinery Ltd. Speed change auxiliary device of lathe
US10962092B2 (en) * 2017-09-08 2021-03-30 Gates Corporation Tensioner and method
US10883575B2 (en) * 2018-01-03 2021-01-05 Gates Corporation Tensioner
US20200011403A1 (en) * 2018-07-05 2020-01-09 Gates Corporation Tensioner with Anodized Friction Surface
JP7227742B2 (en) * 2018-11-14 2023-02-22 大同工業株式会社 chain tensioner
CN111306264A (en) * 2018-12-11 2020-06-19 宁波丰茂远东橡胶有限公司 Engine and driving belt tensioning device thereof and tensioning method of driving belt
US11125305B2 (en) * 2019-06-20 2021-09-21 Gates Corporation Tensioner
US20220099165A1 (en) * 2020-09-28 2022-03-31 Caterpillar Inc. Engine accessory drive system and one-piece bracket for same
TWI851479B (en) * 2023-11-17 2024-08-01 陳君帆 Tensioner driving tool

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2856767A1 (en) * 2003-06-26 2004-12-31 Ina Schaeffler Kg Tightener for traction unit e.g. strap, has swiveling lever with torsion bars, where each bar has one end rotatably connected to lever and another free end rotatably penetrating in machine part
US6895700B2 (en) 2002-03-13 2005-05-24 Rowenta Werke Gmbh Pressing iron soleplate having a hardened and coated surface
DE102009013296A1 (en) * 2009-03-14 2010-09-16 Schaeffler Technologies Gmbh & Co. Kg Screw joint for fastening tensioning roller to e.g. crankshaft housing of internal-combustion engine in automotive industry, has internal thread comprising threaded hole, where thread pitches are formed by screwing-into threaded screw
DE102012223576A1 (en) * 2012-12-18 2014-06-18 Schaeffler Technologies Gmbh & Co. Kg Mechanical torsion spring tensioner for chain drive of internal combustion engine, has clamping part designed as lever with torque-proof contact body that contacts tensioning rail of chain drive in pressure-loading manner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6895700B2 (en) 2002-03-13 2005-05-24 Rowenta Werke Gmbh Pressing iron soleplate having a hardened and coated surface
FR2856767A1 (en) * 2003-06-26 2004-12-31 Ina Schaeffler Kg Tightener for traction unit e.g. strap, has swiveling lever with torsion bars, where each bar has one end rotatably connected to lever and another free end rotatably penetrating in machine part
DE102009013296A1 (en) * 2009-03-14 2010-09-16 Schaeffler Technologies Gmbh & Co. Kg Screw joint for fastening tensioning roller to e.g. crankshaft housing of internal-combustion engine in automotive industry, has internal thread comprising threaded hole, where thread pitches are formed by screwing-into threaded screw
DE102012223576A1 (en) * 2012-12-18 2014-06-18 Schaeffler Technologies Gmbh & Co. Kg Mechanical torsion spring tensioner for chain drive of internal combustion engine, has clamping part designed as lever with torque-proof contact body that contacts tensioning rail of chain drive in pressure-loading manner

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