CN109386579A - Timing with preload and method drives tensioner assembly - Google Patents

Timing with preload and method drives tensioner assembly Download PDF

Info

Publication number
CN109386579A
CN109386579A CN201810856263.0A CN201810856263A CN109386579A CN 109386579 A CN109386579 A CN 109386579A CN 201810856263 A CN201810856263 A CN 201810856263A CN 109386579 A CN109386579 A CN 109386579A
Authority
CN
China
Prior art keywords
tensioner
stretcher
protrusion
plunger
tensioner body
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.)
Pending
Application number
CN201810856263.0A
Other languages
Chinese (zh)
Inventor
R·加伦
D·E·曼
C·L·尼科尔森
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.)
GM Global Technology Operations LLC
Original Assignee
GM Global Technology Operations LLC
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 GM Global Technology Operations LLC filed Critical GM Global Technology Operations LLC
Publication of CN109386579A publication Critical patent/CN109386579A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/348—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear by means acting on timing belts or chains
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/022—Chain drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/024—Belt drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • 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
    • 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
    • F16H7/18—Means for guiding or supporting belts, ropes, or chains
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • F01L2001/0537—Double overhead camshafts [DOHC]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L2001/34486—Location and number of the means for changing the angular relationship
    • F01L2001/34496—Two phasers on different camshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • F01L2303/01—Tools for producing, mounting or adjusting, e.g. some part of the distribution
    • 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
    • F16H2007/0806—Compression coil 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
    • F16H2007/0802—Actuators for final output members
    • F16H2007/0812—Fluid pressure
    • 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
    • F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
    • F16H2007/0859—Check valves
    • 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
    • F16H2007/0872—Sliding members
    • 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

Abstract

A kind of tensioner assembly for engine timing driving device, including stretcher, stretcher have tensioner body, and tensioner body is with fastener openings and limits the chamber with plunger opening.Plunger is arranged in the chamber, and pin can be removed and limit plunger in the chamber.Plunger is configured to bias out when pin is removed from plunger opening.Protrusion extends outwardly from tensioner body and is suitable for receiving applied torque.Tensioner body is configured to the preset torque in response to being applied to protrusion and pivots around the central axis of fastener openings.The method of assembled engines timing driving device includes that preset torque is applied to the protrusion of stretcher, and stretcher is pivotally mounted to cylinder block so that stretcher is rotated towards rotatable device, so that stretcher applies predetermined load to rotatable device.

Description

Timing with preload and method drives tensioner assembly
Introduction
In engine timing driving device, the rotatable element and crankshaft sprocket and camshaft sprocket of such as chain or band Engagement, so that the driving force of crankshaft being capable of rotation cam axis.The Angle Position of the camshaft of Angle Position relative to a crankshaft is true It protects intake valve and exhaust valve opens and closes at desired crank position.In addition, camshaft can be controlled by phaser, to change Angle Position of the camshaft relative to crankshaft, and thereby change the timing that valve opens and closes.Stretcher part is driven via timing Ground keeps appropriate timing, although chain or wearing with expected, provides tensile force.
Realize that desired valve timing also depends on engine assembling process.Component is established in the index of timing driving device In, crankshaft and camshaft are locked in known location (for example, position associated with top dead centre), then assembling timing driving portion Part.Only after the timing driving part for assembling such as camshaft phaser, crankshaft sprocket, chain guide and chain Introduce the tensile force from timing driving stretcher.However, the tensile force in chain influences final cam timing.
Summary of the invention
Enable chain or band for the tensioner assembly of engine timing driving device and the method for assembled engines By preload to tensile force, tensile force alleviates the relaxation introduced by the fastening of camshaft phaser bolt, to facilitate really It protects and realizes timing events.Tensioner assembly for engine timing driving device includes the stretcher with tensioner body. Tensioner body is with fastener openings and limits the chamber with plunger opening.Plunger is arranged in the chamber, and removable Except pin limits plunger in the chamber.When pin is removed, plunger is configured to be open from plunger and bias out.Tensioner assembly also wraps Protrusion is included, protrusion extends outwardly from tensioner body and is suitable for receiving applied torque.Tensioner body is configured to work as and be fixed on It is pivoted in response to being applied to the preset torque of protrusion around the central axis of fastener openings when at fastener openings.
In one aspect of the invention, tensioner body includes the slit for extending through tensioner body, and protrusion is located at Between fastener openings and slit.Tensioner assembly may also include the Shoulder bolts for extending through fastener openings, and extend Across the locking bolt of slit.Locking bolt is interfered at the end of slit with tensioner body, in response to being applied to protrusion Preset torque limits the motion range that tensioner body surrounds Shoulder bolts.
For example, protrusion can have side surface, such as, but not limited to hexagonal side surface, it is suitable for mutual with torque wrench Cooperation.Torque wrench can be applied to protrusion, and rotate to apply preset torque in tensioner body, so that stretcher master Body pivots around Shoulder bolts and predetermined load is applied to adjacent rotatable device, such as timing chain or timing belt. It can choose preset torque, so that gained predetermined load, which is substantially equal to, prevents cam when camshaft phaser bolt is tightened The load of axis phaser rotation.The size of predetermined load is between camshaft phaser bolt and camshaft phaser and cam The function of friction between axis phaser and camshaft, and can be determined by testing.Complete timing driving device When assembling, tensioner body may remain in pivot position.In this way, assembling of the rotatable device in timing driving device Period, the tensile force in rotatable device was thus consistent with the tensile force during power operation during assembly by preload. Therefore the final fastening of timing driving part will not lead to the relaxation of rotatable device, otherwise can make it more difficult to ensure for example The expectation relatively rotation place of crankshaft sprocket and camshaft phaser is kept during net establishment process.
In one aspect of the invention, the first flange extends along first direction from tensioner body, such as downwards.Fastening Part opening is located in the first flange.Second flange is opposite with first direction in a second direction to be extended from tensioner body, such as to On.Slit is located in the second flange.
In one aspect of the invention, protrusion extends from the outside of tensioner body, and the tensioning opposite with outside The inside of device main body is usually plane.For example, inside may be adapted to the cylinder block in face of engine pack.
In one aspect of the invention, tensioner assembly can be combined with the tensioner arms with convex surface.From chamber The distal end for the plunger that room is extended can have the remote surface of convex, and the remote surface configuration of convex is when tensioner body is opened around fastener In response to being applied to the preset torque of protrusion and the convex surface of tensioner arms when the central axis of mouth is pivoted towards tensioner arms Engagement.When tensioner body is pivoted when preset torque is applied to protrusion, two convex surfaces can be in tensioner body It is facing with each other in motion range, to prevent the pivot due to tensioner body and to the unexpected impact of tensioner arms.
In one aspect of the invention, engine pack include cylinder block, the cylinder cover that is supported on cylinder block and The crankshaft being rotatably installed on cylinder block.Engine pack includes at least one camshaft being mounted on cylinder cover, with And the timing driving device of the relative angle orientation for controlling crankshaft and at least one camshaft.Timing driving device includes can The rotatable device operatively engaged with crankshaft and camshaft.Rotatable device is one of chain or band.Tensioner arms can It is pivotally secured on one in cylinder block and cylinder cover, and is configured to guidance rotatable device.Engine pack also wraps Include tensioner assembly.Tensioner assembly includes the tensioner body with fastener openings.Tensioner assembly main body, which has, to be had The chamber of plunger opening, and plunger setting is in the chamber.Pin can be removed to limit plunger in the chamber.Plunger is configured in pin It is biased out when being removed from plunger opening.Protrusion extends outwardly from tensioner body and is suitable for receiving applied torque.Stretcher Main body is pivotably fixed to the cylinder block of neighbouring tensioner arms at fastener openings, and is configured to prominent in response to being applied to The preset torque that rises and pivoted relative to cylinder block towards tensioner arms so that stretcher is via tensioner arms to rotatable device Apply predetermined load.
In one aspect of the invention, tensioner body includes the slit for extending through tensioner body, and protrusion is located at Between fastener openings and slit.Tensioner body includes the locking bolt for being fixed to cylinder block and extending through slit.Locking Bolt is interfered at the end of slit with tensioner body, with the movement in response to the torque limit tensioner body for being applied to protrusion Range.
In one aspect of the invention, the first flange extends along first direction from tensioner body.Fastener openings position In the first flange.Second flange is opposite with first direction in a second direction to be extended from tensioner body.It is convex that slit is located at second In edge.
In one aspect of the invention, protrusion extends from the outside of tensioner body far from cylinder block.Tensioner body Medial surface to cylinder block and usually plane.Tensioner arms can have the outer surface towards stretcher.Plunger it is remote End has the remote surface of convex, and the remote surface configuration of convex is prominent in response to being applied to when tensioner body is pivoted towards tensioner arms The appearance face bonding of the preset torque and tensioner arms that rise.The outer surface of tensioner arms can be curved.For example, tensioner arms Outer surface and the remote surface of plunger can be convex.This allows two surfaces right in the entire motion range of stretcher It connects, because predetermined force is applied to tensioner arms by plunger, so as to cause the predetermined load in rotatable device.
The method of assembled engines timing driving device includes that preset torque is applied to the protrusion of stretcher, and stretcher can Cylinder block is pivotally mounted to so that stretcher is rotated towards rotatable device, so that stretcher is predetermined to rotatable device application Load.Rotatable device is one around crankshaft sprocket and in the chain or band that at least one camshaft phaser is placed It is a.Method also includes the bolt that at least one camshaft phaser is fixed to camshaft by fastening.Once fastening bolt, method packet Containing from the protrusion of stretcher remove preset torque.Then locking bolt can be fastened so that stretcher is fixed to cylinder block.It is predetermined Load is load needed for preventing the rotation of at least one camshaft phaser in fastening bolt.
For example, in one aspect of the invention, method may further include the locking pin on release stretcher, so that The plunger of stretcher is biased towards rotatable device, and predetermined load is applied to rotatable device.
Several additional aspects of method can occur before applying preset torque.For example, by crankshaft be locked in relative to At the predetermined angle position of cylinder block, so that crankshaft is maintained at angular position when applying preset torque, camshaft is locked in phase Pre-position for the cylinder cover being mounted on cylinder block, to prevent at least one camshaft phaser relative to cylinder block Rotation, both of which can occur before applying predetermined load.Method may include that rotatable device is placed on crankshaft Around sprocket wheel and at least one camshaft phaser.In addition, method may include being installed stretcher to vapour using Shoulder bolts Cylinder body, so that stretcher is pivoted around Shoulder bolts when applying preset torque.In addition, before applying preset torque and Before fastening locking bolt, method may include that locking bolt is passed through the slit in stretcher to extend in cylinder block.Slit It is configured so that the end of the adjacent slit of locking bolt when applying preset torque with locking bolt.In an example, will make a reservation for These movements can be first carried out in the assembler (or robot) that torque is applied to tensioning bolt.Alternatively, engine pack can With transport to final assembling destination, in the final assembling destination, torque will be applied to protrusion, wherein having been carried out this One or more of a little movements.
From below in conjunction with attached drawing in the detailed description for realizing best mode of the invention, features described above of the invention and excellent Point and other feature and advantage will become obvious.
Detailed description of the invention
Fig. 1 is the schematic diagram with the local perspective view of engine pack of timing driving device, timing driving device tool There is tensioner assembly within the scope of the invention.
Fig. 2 be Fig. 1 timing driving device and tensioner assembly engine towards the schematic diagram of the perspective view of side.
Fig. 3 is the signal of the local perspective view of the timing driving device with Fig. 1 and the engine pack of tensioner assembly Figure shows the tensioner assembly before applying applied torque.
Fig. 4 is the signal of the local perspective view of the timing driving device with Fig. 3 and the engine pack of tensioner assembly Figure shows in phantom the torque wrench for applying torque to the torque reception features of tensioner assembly.
Fig. 5 is the schematic diagram of the perspective view of the tensioner assembly of Fig. 1.
Fig. 6 is the schematic partial view of the front end view of stretcher, and stretcher is fixed to cylinder block and has and moved Except plunger.
Fig. 7 is the flow chart of the method for assembled engines timing driving device.
Specific embodiment
With reference to attached drawing, wherein identical appended drawing reference refers to identical component in all views, Fig. 1 shows engine Component 10, with timing driving device 12, timing driving device 12 includes the tensioner assembly 13 with stretcher 15.Start Thermomechanical components 10 include cylinder block 14 and the cylinder cover 16 being supported on cylinder block 14.Crankshaft 18 is rotatably installed in cylinder block 14 On.At least one camshaft is mounted on cylinder cover 16.In the shown embodiment, there are admission cam shaft 20A and exhaust cams Axis 20B is configured to open and close intake valve and exhaust valve respectively.
The relative angle orientation of timing driving device 12 control crankshaft 18 and camshaft 20A, 20B.Timing driving device 12 Including rotatable device 22, operationally engaged with crankshaft 18 and camshaft 20A, 20B.Rotatable device 22 can be chain Or band.For purposes of discussion, rotatable device 22 can be described as chain herein；It should be appreciated, however, that rotatable device 22 It can be band.Chain 22 is operatively engaged with crankshaft sprocket 24, and crankshaft sprocket 24 is solid using one or more crank bolts 26 Surely it installs to crankshaft 18, so that sprocket wheel 24 rotates together with crankshaft 18.Chain 22 operationally connects with cam sprocket wheel 28A, 28B It closes, cam sprocket wheel 28A, 28B are integral with camshaft phaser 27A, 27B respectively.Camshaft phaser 27A, 27B are installed respectively On camshaft 20A, 20B, each camshaft has one or more camshaft phaser bolts, such as bolt 30A, 30B.It is convex Wheel shaft phaser 27A, 27B changed via oil pressure cntrol or in other ways by engine controller (not shown) camshaft 20A, Angle Position of the 20B relative to respective sprocket 28A, 28B.This is changed beats relative to the intake valve and/or exhaust valve of crank position The timing opened.
As described herein, other timing driving parts include one or more chain guides 36 and tensioner assembly 13, Tensioner assembly 13 includes tensioner arms 32 (also referred to as stretcher guiding piece), and tensioner arms 32 guide chain 22 and use bolt 34 or other fasteners be pivotably fixed to cylinder cover 16 so that tensioner arms 32 around pivot axis P 1 pivot and be configured to It guides chain 22 and guides the plunger 52 of tensioner assembly 13, to act on chain 22.When stretcher 15 is via stretcher When arm 32 loads chain 22, tensioner arms 32 pivot about axis P1 pivot, mobile towards chain guide 36, thus in chain Load (that is, pulling force) is generated in 22.Therefore, tensioner arms 32 guide chain between crankshaft sprocket 24 and camshaft sprocket 28B 22.Although showing installation to cylinder cover 16, in other embodiments, tensioner arms 32 can be shorter, and installs to cylinder Body 14 rather than cylinder cover 16.
Another chain guide 36 is fixed to cylinder cover 16 by bolt 38, and is also fixed to cylinder by bolt 40 Body 14.Chain guide 36 guides chain 22 between camshaft sprocket 28A and crankshaft sprocket 24.
It should be appreciated that bolt as described herein or other fasteners can be operated installing component to cylinder block 14 or cylinder On lid 16, it is open and cooperates with the respective fastener in cylinder block 14 or cylinder cover 16, and may or may not be screw thread.
Tensioner assembly 13 is configured to allow chain 22 during engine assembles by preload, wherein stretcher 15 via The load that tensioner arms 32 are applied to chain 22 is substantially equal to be born by what tightening cam axis phaser bolt 30A, 30B applied It carries.The preload of of substantially equal size prevents from introducing chain relaxation during assembly, and ensures engine and timing driving portion Desired timing is best accomplished in the assembling of part.
It refers to Figures 5 and 6, stretcher 15 includes tensioner body 44, and tensioner body 44 has the first flange 45, fastener Opening 46 extends through the first flange 45.Shoulder bolts 48 extend through fastener openings 46 and have can threaded end And the end is fixed to cylinder block 14 so that tensioner body 44 is pivotably fixed to cylinder block 14.In other words, stretcher Main body 44 can be pivoted relative to cylinder block 14 around Shoulder bolts 48 (that is, the central axis 47 for surrounding fastener openings 46).
When as that can be combined together from Fig. 1 and Fig. 6 and determination, tensioner body 44 is further defined with plunger opening 50 Chamber 55, plunger opening 50 is facing generally towards chain 22.Substantial cylindrical plunger 52 is arranged in chamber 55.Shown in Fig. 3 Removable locking pin 42 plunger 52 is limited in chamber 55, with prevent plunger 52 by such as pressurization oil and/or setting exist The offset features portion of spring in chamber 55 biases further out from opening 46.As described herein, when locking pin 42 is removed When, the tensioner arms 32 that plunger 52 is pushed and abutted against further out from opening 50 by the bias force in offset features portion, Apply predetermined force on arm 32, to generate predetermined load L in chain 22.
Tensioner body 44 includes protrusion 54, and protrusion 54 is extending outwardly away from cylinder block from the outside of tensioner body 44 56 14.The inside 57 of tensioner body 44 is usually plane, and visible in Fig. 2 and Fig. 6.Inside 57 is configured in stretcher 15 face cylinder block 14 when being fixed to cylinder block 14, as best shown in fig. 6.
Protrusion 54 is suitable for receiving the applied torque for applying tool from torque.For example, as shown in figure 5, protrusion 54 has Hexagonal side surface 60, hexagonal side surface 60 are suitable for cooperating with the torque wrench 62 being represented by dotted lines, torque wrench 62 The protrusion 54 preset torque T being applied in Fig. 4.Tensioner body 44 is in response to being applied to the preset torque T of protrusion 54 and phase Cylinder block 14 is pivoted towards tensioner arms 32, so that stretcher 15 is via tensioner arms (more specifically, plunger 52) in chain Apply predetermined force F on item 22, predetermined tension load L is generated on chain 22.Predetermined force F causes predetermined load L (that is, chain 22 In tension load L, also referred to as pulling force L, as shown in Figure 4).The size of predetermined load is camshaft phaser bolt 30A, 30B The function of friction between camshaft phaser 28A, 28B and between camshaft phaser and camshaft 20A, 20B, and It can be determined by testing.By comparing the position relative to the tensioner body 44 in Fig. 3 of the position in Fig. 4, tensioning The pivot of device main body 44 is apparent.The position of tensioner body 44 is by plunger 52 and chamber 55 before applying preset torque The angle A 1 of central axis C and horizontal H indicates.When applying preset torque T, the position of tensioner body 44 is by plunger 52 and chamber The angle A 2 of the central axis C and horizontal H of room 55 indicate.
Referring to figure 5 and figure 6, tensioner body 44 includes the second flange 63, and the second flange 63 is from tensioner body 44 along the Two direction D2 extend, and have the slit 64 extended through.Protrusion 54 is between fastener openings 46 and slit 64.? Tight device assembly 13 includes the locking bolt 66 for being fixed to cylinder block 14 and extending through slit 64.Second direction D2 and the first flange The first direction D1 of 45 extensions is opposite.For example, first direction D1 is usually downward when the installation of stretcher 15 to cylinder block 14, the Two direction D2 are usually upward.First direction D1 is vertical with the central axis C of plunger 52 and chamber 55 on direction generally downward, And second direction D2 is vertical with the central axis C of plunger 52 and chamber 55 in a generally upward direction.The center of protrusion 54 Axis 49 perpendicular to the central axis C of plunger 52 and chamber 55, perpendicular to the first flange 45 first direction D1 and perpendicular to The second direction D2 of second flange 63 extends.Therefore, in the first opening 46 and the central axis 47 of Shoulder bolts 48, protrusion 54 Mandrel line 49 is parallel with the central axis 51 of locking bolt.
As best shown in figure 2, slit 64 is thin relative to the diameter of the part for the locking bolt 66 for extending through slit 64 Long.When applying torque T as described above, and assume that locking bolt 66 not yet fastens so that the second flange 63 is not protected tightly It holds between locking bolt 66 and cylinder block 14, then tensioner body 44 can be mobile relative to fixedly locked bolt 66.More Body, the length of slit 64 allows first position and application of the tensioner body 44 in Fig. 3 before applying applied torque T The motion range between the second position in Fig. 4 when torque T.The first position of Fig. 3 by locking bolt 66 shank and slit The interference of 64 first end 70 (shown in Fig. 4) (that is, near proximal end of chain 22) determines.The second position of Fig. 4 is by locking The interference of the second end 72 (shown in Fig. 3) (that is, from the farther distal end of chain 22) of the shank and slit 64 of bolt 66 determines.Cause This, locking bolt 66 is interfered at the either end of slit 64 with tensioner body 44, in response to the torque for being applied to protrusion 54 Limit the motion range of tensioner body 44.
Plunger 52 and tensioner arms 32 collaboratively configure, so that their docking will not interfere tensioner body 44 being applied Add the ability pivoted under torque T.For example, butting surface can be it is curved so that the friction during the pivot of stretcher 15 is most Smallization.As shown in figure 3, tensioner arms 32 have the convex external surface 74 towards stretcher 15.As shown in Figure 3 and Figure 5, plunger 52 Distal end 76 have the remote surface 78 of convex.Remote surface 78 is configured to when tensioner body 44 is solid before applying applied torque T It is fixed to cylinder block 14 when (that is, in the first position of Fig. 3) when and when tensioner body 44 is in response to being applied to protrusion 54 Preset torque T (that is, in second position of Fig. 4) and when being pivoted towards tensioner arms 32, convex appearance with tensioner arms 32 Face 74 engages.When predetermined force F is applied to tensioner arms 32 by plunger 52, this allows two surfaces 74,78 in stretcher 15 Docking in entire motion range.Two convex surfaces 74,78 are facing with each other in the motion range of tensioner body 44, prevent by In tensioner body 44 pivot and to the unexpected impact of tensioner arms 32.
When completing the assembling of other timing driving parts, tensioner body 44 can be maintained at figure by torque wrench 62 4 pivot position.In this way, chain 22 during the assembling of timing driving device 12 by preload, chain during assembly Therefore tensile force in item 22 is substantially equal to the tensile force in chain 22 during subsequent engine use.Timing driving portion Therefore the final fastening of part will not introduce relaxation in chain 22, otherwise can make it more difficult to ensure during net establishment process Keep the expectation relatively rotation place of crankshaft sprocket 24 and camshaft phaser 27A, 27B.
According to above-mentioned stretcher 15 and timing driving device 12, Fig. 7 shows diagram assembled engines timing driving device The flow chart of 12 method 100.Method 100 starts from several movements occurred before the preload of chain 22.For example, in frame In 102, crankshaft 18 is locked in scheduled rotation position.Those skilled in the art understand that the various modes of locking crankshaft.For example, Cue mark on crankshaft 18 can be aligned with the cue mark on cylinder block 14, to ensure scheduled rotation position, such as on Stop.It may then pass through and extend through the tool of such as pin etc to come in the bell housing of flex plate into opening Locking crankshaft 18 is realized, so that tool is against the flex plate being mounted on crankshaft 18.
Similarly, in frame 104, camshaft 20A, 20B are respectively locked in scheduled rotation position, such as by by cam Cue mark on axis 20A, 20B is aligned with the cue mark on cylinder cover 16, then extends through the corresponding tool such as sold Cross the opening in each camshaft 20A, 20B.Tool will abut against cylinder cover 16 or other non-rotatable components, to prevent camshaft The rotation of 20A, 20B.
Next, camshaft phaser 27A, 27B and stretcher 15 loosely assemble in frame 106, such as by by band There are camshaft phaser 27A, 27B of cam sprocket wheel 28A, 28B to be mounted on camshaft 20A, on 20B, and incomplete fastening bolt 30A,30B.Similarly, frame 106 may include loosely installing stretcher 15 to cylinder block 14, without Shoulder bolts 48 are complete It is fastened to finally predesignated torque entirely.For example, each installation task in frame 106 can be completed by fastening manually.
Next, in block 108, locking bolt 66 can extend through the slit 64 in tensioner body 44 and enter vapour Cylinder body 14, but not exclusively fastening locking bolt 66, allow tensioner body 44 relative to cylinder block as described herein 14 and Shoulder bolts 48 pivot.
In block 110, can assembling timing driving part, such as by by the installation of tensioner arms 32 to cylinder cover 16, will The installation of chain guide 36 is put to cylinder cover 16 and cylinder block 14 by the installation of crankshaft sprocket 24 to crankshaft 18, and by chain 22 It sets around camshaft sprocket 28A, 28B and crankshaft sprocket 24.
In frame 112, stretcher 13 then can be positioned, such as by the way that tensioner body 44 is placed on the first of Fig. 3 Position, locking bolt 66 are located at the end 70 of slit 64.Then Shoulder bolts 48 can be fastened in frame 114.Even if shoulder spiral shell Bolt 48 is fastened to cylinder block 14 completely, and tensioner body 44 can also be pivoted around Shoulder bolts 48.
By preset torque T being applied to protrusion 54 using torque wrench 62 so that stretcher 15 is rotated towards chain 22, It is now ready for driver 12 and gets out the preload chain 22 in frame 116, so that predetermined load L is applied to chain by stretcher 15 22 (via the plungers 52 docked with tensioner arms 32).Next, camshaft phaser bolt 30A, 30B is primary in frame 118 One ground fastening, or fastened together using multiaxis tool.Due to the preload on chain 22, fastening bolt 30A, 30B will not It will lead to otherwise when accurately assembling the relatively rotation place of crankshaft 18 and camshaft 20A, 20B in chain in need of consideration Relaxation.
Then locking bolt 66 is fastened in block 120, and stretcher 15 is fixed to cylinder block 14.Once camshaft phase Device bolt 30A, 30B and locking bolt 66 are fastened, in frame 122, by removing torque wrench 62 for preset torque T from tensioning The protrusion 54 of device main body 44 removes.Then (that is, removal) locking pin 42 can be discharged in frame 124, so that in stretcher 13 Offset features portion biases plunger 52 towards chain 22.Then camshaft 20A, 20B and crankshaft 18 are unlocked, so that they can be with Rotation, and will be rotated desired relative to timing.
Although being described in detail for executing optimal mode of the invention, it is familiar with the field that the invention relates to Technical staff will be recognized for practicing various supplement or replacements of the invention within the scope of the appended claims.

Claims (10)

1. a kind of tensioner assembly for engine timing driving device, the tensioner assembly includes:
Stretcher comprising:
Tensioner body with fastener openings and limits the chamber with plunger opening；
Plunger in the cavity and the removable pin by plunger limitation in the cavity are set, wherein described Plunger is configured to bias out when the pin is removed from plunger opening；And
Protrusion extends outwardly from the tensioner body and is suitable for receiving the application torque；
Wherein, the tensioner body is configured to when being fixed at the fastener openings in response to being applied to the protrusion Preset torque and around the central axis of the fastener openings pivot.
2. tensioner assembly as described in claim 1, wherein the tensioner body includes extending through the stretcher master The slit of body, the protrusion is between the fastener openings and the slit.
3. tensioner assembly as claimed in claim 2, further includes:
Extend through the Shoulder bolts of the fastener openings；And
Extend through the locking bolt of the slit；Wherein, the locking bolt at the end of the slit with the stretcher Subject interference surrounds the shoulder spiral shell to limit the tensioner body in response to the preset torque for being applied to the protrusion The motion range of bolt.
4. tensioner assembly as claimed in claim 2, in which:
First flange extends along first direction from the tensioner body；
The fastener openings are located in first flange；
Second flange extends along second direction opposite to the first direction from the tensioner body；And
The slit is located in second flange.
5. tensioner assembly as described in claim 1, wherein the side surface of the protrusion is hexagon.
6. tensioner assembly as described in claim 1, wherein the protrusion extends from the outside of the tensioner body；And And wherein, the inside generally plane of the tensioner body opposite with the outside.
7. tensioner assembly as described in claim 1 is combined with the tensioner arms with convex surface；
Wherein, the distal end of the plunger extended from the chamber has the remote surface of convex, and the remote surface configuration of the convex is When the tensioner body towards the tensioner arms around the fastener openings the central axis pivot when in response to The preset torque for being applied to the protrusion is engaged with the convex surface of the tensioner arms.
8. a kind of method of assembled engines timing driving device, the method includes:
Preset torque is applied to the protrusion of stretcher, the stretcher is pivotally mounted to cylinder block so that the stretcher It is rotated towards rotatable device, so that the stretcher applies predetermined load to the rotatable device；
Wherein, the rotatable device is around crankshaft sprocket and around the chain or band of the placement of at least one camshaft phaser In one；
At least one described camshaft phaser is fixed to the bolt of the camshaft by fastening；
The preset torque is removed from the protrusion of the stretcher；And
Locking bolt is fastened so that the stretcher is fixed to the cylinder block.
9. method according to claim 8 further includes:
The locking pin on the stretcher is discharged, so that the plunger of the stretcher is biased towards the rotatable device.
10. method according to claim 8 further includes:
Before applying the preset torque, the stretcher is installed to the cylinder block using Shoulder bolts, so that when applying The stretcher when preset torque is added to pivot around the Shoulder bolts.
CN201810856263.0A 2017-08-10 2018-07-31 Timing with preload and method drives tensioner assembly Pending CN109386579A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US15/673731 2017-08-10
US15/673,731 US20190048764A1 (en) 2017-08-10 2017-08-10 Timing drive tensioner assembly with pre-load and method

Publications (1)

Publication Number Publication Date
CN109386579A true CN109386579A (en) 2019-02-26

Family

ID=65084732

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810856263.0A Pending CN109386579A (en) 2017-08-10 2018-07-31 Timing with preload and method drives tensioner assembly

Country Status (3)

Country Link
US (1) US20190048764A1 (en)
CN (1) CN109386579A (en)
DE (1) DE102018119236A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114833574A (en) * 2022-06-10 2022-08-02 一汽解放汽车有限公司 Assembling device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020202445A1 (en) * 2020-02-26 2021-08-26 Psa Automobiles Sa Method for assembling a camshaft drive
US11230950B1 (en) 2021-01-22 2022-01-25 Borgwarner, Inc. Electrically-actuated variable camshaft timing phaser with removable fixture

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1443955A (en) * 2002-02-26 2003-09-24 博格沃纳.莫尔斯Tec日本株式会社 Vane type tensioning device
US20100022338A1 (en) * 2008-07-23 2010-01-28 Schaeffler Kg Pivot type tensioner for timing chain systems
CN104251291A (en) * 2013-06-26 2014-12-31 株式会社椿本链条 Chain tensioner
US20150024887A1 (en) * 2013-07-18 2015-01-22 Hyundai Motor Company Hydraulic timing chain tensioner and timing chain system
CN106051081A (en) * 2015-02-27 2016-10-26 伊威斯发动机系统有限责任两合公司 Tensioning rail with bayonet catch

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5393712B2 (en) * 2011-02-28 2014-01-22 株式会社椿本チエイン Ratchet tensioner

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1443955A (en) * 2002-02-26 2003-09-24 博格沃纳.莫尔斯Tec日本株式会社 Vane type tensioning device
US20100022338A1 (en) * 2008-07-23 2010-01-28 Schaeffler Kg Pivot type tensioner for timing chain systems
CN104251291A (en) * 2013-06-26 2014-12-31 株式会社椿本链条 Chain tensioner
US20150024887A1 (en) * 2013-07-18 2015-01-22 Hyundai Motor Company Hydraulic timing chain tensioner and timing chain system
CN106051081A (en) * 2015-02-27 2016-10-26 伊威斯发动机系统有限责任两合公司 Tensioning rail with bayonet catch

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114833574A (en) * 2022-06-10 2022-08-02 一汽解放汽车有限公司 Assembling device
CN114833574B (en) * 2022-06-10 2023-10-17 一汽解放汽车有限公司 Assembling device

Also Published As

Publication number Publication date
US20190048764A1 (en) 2019-02-14
DE102018119236A1 (en) 2019-02-14

Similar Documents

Publication Publication Date Title
CN109386579A (en) Timing with preload and method drives tensioner assembly
EP2049816B1 (en) Assembly system and method for a tensioned chain drive system
US8092327B2 (en) Tensioner lever for chain drive
EP1645377B1 (en) Assembly for tensioning a saw chain
EP1279863B1 (en) Tensioner with projection-preventing hook
EP1857644B1 (en) Valve opening/closing timing controller
US20060084537A1 (en) Tensioner with improved stopper
US8257212B2 (en) Chain tensioner
US9657608B2 (en) Variable valve timing device and method of assembling same
US8656883B2 (en) Recoil starter assembly for an engine
EP2951466B1 (en) Spacer for belt tensioner
US9004028B2 (en) Valve timing control apparatus
WO2006124150A1 (en) Synchronous belt drive kit and module
JPH0777254A (en) Tensioner of four-cycle engine
EP1541812A2 (en) A cassette for securing shipping and assembly of a camshaft drive and timing system
KR101827096B1 (en) Sprocket structure of engine
US20170058725A1 (en) Installing structure for electric variable valve timing apparatus
US9643302B2 (en) Pre-tensioning tool for an engine tensioner
WO2018123683A1 (en) Valve timing changing device
US4684357A (en) Timing chain retractor and lock
US6845742B2 (en) Timing chain cover of engine
EP3376000B1 (en) Camshaft drive device
JPH0738751Y2 (en) Belt tensioning device for internal combustion engine
US10495194B2 (en) Adjustable bracket to adjust front end accessory drive for use with stretch fit belt
JP2864401B2 (en) Tensioner pulley structure of internal combustion engine

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20190226

WD01 Invention patent application deemed withdrawn after publication