CN103857941A

CN103857941A - Tensioner

Info

Publication number: CN103857941A
Application number: CN201280048545.9A
Authority: CN
Inventors: 川濑诚; 中川侑己; 丹羽秀和
Original assignee: Nok Corp
Current assignee: Nok Corp
Priority date: 2011-10-06
Filing date: 2012-08-07
Publication date: 2014-06-11
Anticipated expiration: 2032-08-07
Also published as: JP2013083279A; JP5800191B2; WO2013051337A1; CN103857941B

Abstract

The purpose of the present invention is to provide a tensioner which has favorable sound-quieting performance, represses deformation caused by the rubber molding pressure on a tensioner made of resin material, and can be applied to a variety of forms of tensioner. For this purpose, the present invention adopts the configuration of a tensioner to which are provided an arm body made of resin and provided with a strip-shaped sliding surface for sliding a chain bridged between sprockets, and a receiving part at which a pushrod abuts against a receiving surface of the arm body opposite the sliding surface thereof, wherein the receiving part is provided with: a socket member made of a resin material and comprising a planar part which is detachably mounted onto the arm body and faces the receiving surface with a gap therebetween, and a leg part which extends along a side surface of the arm body from the two sides of the planar part and which is provided with a locking projection for engaging with a groove part provided to the side surface of the arm body; and a pad part made of a rubber-like elastic material and provided with an abutting part which is integrally attached to the socket member and against which the pushrod abuts, and a buffer part interposed between the planar part of the socket member and the receiving surface.

Description

Tension device

Technical field

The present invention relates to a kind of tension device.

And, the present invention relates to a kind of for making the tension device of tension force tensioning of the chain or the belt etc. that use as power transfer unit.

In addition, the present invention relates to the tension device that tension device that a kind of cam chain that is suitable as explosive motor uses uses.

Background technique

Previously, in the mechanical device of the Flexible Transmission unit that uses chain or belt (volume I is hung け Den Move means), in order to prevent the tension recovery of chain or belt, power transmission efficiency reduces, and is provided with the tension device of the tension force tensioning for making chain or belt.

Specifically, use with the form shown in Fig. 7.

That is, Fig. 7 is the longitudinal section through the cam chain chamber of explosive motor, and the left of figure is front.

Crankshaft 10 and drive sprocket 11 are to the direction of arrow rotation of figure.

Via cam chain 20, driven driven sprocket 31 and camshaft 30 rotate to the direction of arrow.

Along the cam chain 20 of the side that stretched by drive sprocket 11, be provided with the cam chain guiding element 40 of this cam chain 20 of guiding, and be fixed in shell 50 sides that form cam chain chamber.

Cam chain guiding element 40 and cross sections cam chain 20 slip sides, form the groove of the width that is roughly equivalent to cam chain 20, and cam chain 20 slides at the bottom land of groove.

On the other hand, along the cam chain 20 of being released a side by drive sprocket 11, be provided with cam chain tensioning device 90.

This cam chain tensioning device 90, in the mode that can shake centered by the assembly department of its underpart 400 and supported.

Connect shell 50 and tension device lift device 70 is set, be arranged at the receiving portion 800 of the rubber-like elasticity material system of cam chain tensioning device 20 with the front end pushing to the inner outstanding push rod 71 of chain chamber, the cam chain tensioning device 90 being urged pushes cam chain 20, prevents that cam chain 20 is lax.

The banded slip face 600 of stiffening plate that as shown in Figure 8, cam chain tensioning device 90 is made by steel metalloid to have elastic force, the rubber-like elasticity material system that forms with this stiffening plate forms.

Slip face 600 bending formings of cam chain tensioning device 90 are the shape of cam chain 20 bendings, the cross section of the slide part side of this cam chain tensioning device 90 forms the groove of the width that is roughly equivalent to cam chain 20, and cam chain 20 slides at the bottom land of groove.

,, for cam chain 20 can not come off from the face that slides, side wall portion is arranged to the facial width direction both sides of sliding.

But, the receiving portion 800 of rubber-like elasticity material system is always subject to the load from push rod 71, if therefore used for a long time, can produce elastic force in the receiving portion 800 of rubber-like elasticity material system and weaken (permanent deformation), the pushing force of cam chain 20 is reduced, produce in early days the problem of abrasion simultaneously.

Particularly in the case of being exposed to as the hot environment of explosive motor, it is obvious that the elastic force of the receiving portion 800 of rubber-like elasticity material system weakens (permanent deformation).

In addition, complex structure, produces the problem that manufacture cost increases.

Therefore,, in order to solve such problem, only make tension device with resin material.

But there is the problem of quiet poor performance in this tension device.

Therefore, carried out the receiving portion of rubber-like elasticity material system to be arranged at integratedly the trial of the tension device of resin material system, still due to the forming pressure of rubber, brought the danger of tension device distortion.

Prior art document

Patent documentation

Patent documentation 1: Japanese Patent Publication 6-14446 communique

Patent documentation 2: TOHKEMY 2002-70963 communique

Summary of the invention

(problem that invention will solve)

In view of the above problems, object is to provide a kind of tension device in the present invention, and it is quiet functional, suppresses the distortion of the tension device generation to resin material system due to rubber molding pressure, can be applicable to the tension device of variety of way.

(technological scheme of technical solution problem)

Tension device of the present invention is provided with: the arm main body of resin material system, has the banded slip surface that the chain that makes to be set up between sprocket wheel or belt slide; Receiving portion, is arranged at the bearing surface of the opposition side of the described slip surface of described arm main body, carries out butt with the push rod of tension device lift device.Described tension device is characterised in that, described receiving portion handling are installed on described arm main body freely, possess the female component of resin material system and the block portion of rubber-like elasticity material system.The female component of described resin material system forms by having with described bearing surface the plate-like portion and the foot that face mutually with gap, described foot extends the side along described arm main body from the both sides of described plate-like portion, has the engaging projection engaging with the slot part of side that is arranged at described arm main body simultaneously.The block portion of described rubber-like elasticity material system is installed on described female component integratedly, has and described push rod carries out the abutting part of butt and the buffer part between plate-like portion and the described bearing surface of described female component.

(effect of invention)

The present invention realizes the effect of following record.

According to tension device of the present invention, quiet functional, suppress the distortion of the tension device generation to resin material system due to rubber molding pressure, can be applicable to the tension device of variety of way.

According to tension device of the present invention, the integrated binder that do not use of the block portion of rubber-like elasticity material system and the female component of resin material system just can be realized reliably.

According to tension device of the present invention, because the stress of direction is always pushed to female component in the buffer part effect of block portion, therefore can suppress rocking between receiving portion and arm main body.

According to tension device of the present invention, owing to can effectively avoid the distortional stress increasing in block portion, thereby the stress increasing on female component is relaxed, can improve the durability of receiving portion.

Accompanying drawing explanation

Fig. 1 is the side view of the tension device that relates to of the first mode of execution of the present invention.

Fig. 2 is the A-A sectional view of Fig. 1.

Fig. 3 is the view that the second mode of execution the present invention relates to is similarly shown with Fig. 2.

Fig. 4 is the major component longitudinal section that penetrates the cam chain chamber of the applicable explosive motor of the tension device of Fig. 1.

Fig. 5 is the part side view of the tension device that relates to of the 3rd mode of execution of the present invention.

Fig. 6 is the part side view of the tension device that relates to of the 4th mode of execution of the present invention.

Fig. 7 is the major component longitudinal section that penetrates the cam chain chamber of the applicable explosive motor of existing tension device.

Fig. 8 is the side view of the tension device that relates to of prior art.

Symbol description

1 arm main body

2 receiving portions

9 tension device

11 sprocket wheels

12 slip surfaces

13 bearing surface

14 sides

15 slot parts

21 female components

22 block portions

211 plate-like portions

212 foots

213 through holes

214 engaging projections

221 abutting parts

222 buffer part.

Embodiment

Below, based on accompanying drawing, to describing for implementing the preferred embodiment of the present invention.

< the first mode of execution >

In Fig. 1, Fig. 2 and Fig. 4, the tension device 9 the present invention relates to is configured to and is provided with: the arm main body 1 of resin material system, has the banded slip surface 12 that the chain 20 that makes to be set up between

sprocket wheel

11,31 or belt slide; Receiving portion 2, is arranged at the bearing surface 13 of the opposition side of the slip surface 12 of this arm main body 1, carries out butt with the push rod 71 of tension device lift device 70.

And this receiving portion 2 is loaded and unloaded and is installed on freely arm main body 1, possess the female component 21 of resin material system and the block portion 22 of rubber-like elasticity material system.The female component 21 of this resin material system forms by having with bearing surface 13 plate-like portion 211 and the Liang Ge foot 212,212 that face mutually with gap, extend along the

side

14,14 of arm main body 1 Gai Liangge foot 212,212 both sides from this plate-like portion 211, has the projection 214,214 for engaging engaging with the

slot part

15,15 of

side

14,14 that is arranged at this arm main body 1 simultaneously.The block portion 22 of this rubber-like elasticity material system is installed on this female component 21 integratedly, has and push rod 71 carries out the abutting part 221 of butt and the buffer part 222 between plate-like portion 211 and the bearing surface 13 of female component 21.

And this abutting part 221 is connected via the through hole 213 that is arranged at plate-like portion 211 mutually integratedly with buffer part 222.

Thus, the block portion 22 of rubber-like elasticity material system just can realize reliably with the integrated binder that do not use of the female component 21 of resin material system, if use binder, can realize more reliably integrated.

And buffer part 222 is arranged between plate-like portion 211 and bearing surface 13 under compressed state.

Thus, because the buffer part 222 of block portion 22 acts on the stress of always female component 21 being pushed to (top in Fig. 2) direction, therefore can suppress rocking between receiving portion 2 and arm main body 1, thereby can realize better quiet performance.

In addition the engaging that, is arranged at the foot 212,212 of female component 21 uses projection 214,214 to engage with

slot part

15,15 movably to slip surface 12 sides (below in Fig. 2).

; because engaging is with having gap between projection 214,214 and slip surface 12 sides of

slot part

15,15; therefore when the pushing force of push rod 71 acts on block portion 22; bulk portion 22 is overall when compressed; corresponding to this action, female component 21 also needs to slip surface 12 sides (below in Fig. 2) mobile.

Now, because engaging is with existing gap between projection 214,214 and slip surface 12 sides of

slot part

15,15, therefore engaging can be easily mobile to slip surface 12 sides (below in Fig. 2) in

slot part

15,15 by projection 214,214.

Therefore, can effectively avoid the distortional stress applying in block portion 22, relax the stress being applied on female component 21, can improve the durability of receiving portion 2.

And for the material of arm main body 1, various resin materials can both be suitable for, preferably use does not contain the polyamide resin of bulking agent.

By using the resin that does not contain bulking agent, can reduce the damage to chain or belt.

And, as the material of block portion 22, suitably select various rubber materials and use, but under the environment using in explosive motor, when being chosen as stable on heating rubber material, also machine oil is there is the rubber material of oil resistance, preferably use nitrile butadiene rubber, acrylic rubber.

In the present embodiment, the abutting part 221 of block portion 22 carry out the face of butt with push rod 71, form along the flexure plane of the convex of slip surface 12.

Thus, due to few with the butt area of push rod 71, therefore can improve the durability of block portion 22.

< the second mode of execution >

Then,, based on Fig. 3, the tension device 9 that the second mode of execution of the present invention is related to describes.

With the difference of the tension device 9 that relates to of the first mode of execution of explanation be before that the face of 71 butts of push rod of the abutting part 221 of block portion 22 is the curved surface of convex in the direction vertical with slip surface 12.

< the 3rd mode of execution >

Then,, based on Fig. 5, the tension device 9 that the 3rd mode of execution of the present invention is related to describes.

With the difference of the tension device 9 that relates to of the first mode of execution of explanation be before that the face of 71 butts of push rod of the abutting part 221 of block portion 22, is the tabular surface along slip surface 12.

Thus, because the area with larger contacts with push rod 71, therefore can reliably the power of push rod 71 be passed to tension device 9.

< the 4th mode of execution >

Then,, based on Fig. 6, the tension device 9 that the 4th mode of execution of the present invention is related to describes.

With the difference of the tension device 9 that relates to of the first mode of execution of explanation be before that the face of 71 butts of push rod of the abutting part 221 of block portion 22, is the flexure plane of the concavity along slip surface 12.

Thus, by guiding to block Bu22 center with the contact position of push rod 71, therefore can reliably the power of push rod 71 be passed to tension device 9 due to always.

And the present invention is not limited to the optimal way for implementing foregoing invention, in the situation that not departing from main idea of the present invention, certainly can adopt other various formations.

(utilizability in industry)

Being suitable as the tension device that the cam chain of explosive motor uses uses.

Claims

1. a tension device, this tension device (9) is provided with: the arm main body (1) of resin material system, there is the banded slip surface (12) that the chain (20) that makes to be set up between sprocket wheel (11), (31) or belt slide, do not contain glass as packing material; Receiving portion (2), is arranged at the bearing surface (13) of the opposition side of the described slip surface (12) of described arm main body (1), carries out butt with the push rod (71) of tension device lift device (70), and described tension device (9) is characterised in that,

Described receiving portion (2) is fixed on described arm main body (1) side, simultaneously by containing the supporting portion (21) of glass as the resin material system of packing material and carrying out abutting part (22) formation of the rubber-like elasticity material system of butt on the surface of described supporting portion (21) with described push rod (71).

2. tension device according to claim 1, is characterized in that, described supporting portion (21) and described arm main body (1) between be provided with and prevent from coming off unit (211).

3. tension device according to claim 1 and 2, it is characterized in that, after integrally formed, described abutting part (22) is integrally formed in to the surface of described supporting portion (21) by two look mould-forming method in described arm main body (1) and described supporting portion (21).

4. tension device according to claim 1 and 2, is characterized in that, described abutting part (22) is being integrally formed in to described supporting portion (21) afterwards, and described supporting portion (21) are fixed on to described arm main body (1).