CN206130011U - Take timing chain tensioning ware of constant voltage control valve - Google Patents
Take timing chain tensioning ware of constant voltage control valve Download PDFInfo
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- CN206130011U CN206130011U CN201621190108.2U CN201621190108U CN206130011U CN 206130011 U CN206130011 U CN 206130011U CN 201621190108 U CN201621190108 U CN 201621190108U CN 206130011 U CN206130011 U CN 206130011U
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- valve
- control valve
- sliding seat
- constant
- pressure control
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Abstract
The utility model provides a take timing chain tensioning ware of constant voltage control valve, including casing, plunger and reset spring and constant voltage control valve, the cooperation of plunger and casing inner chamber and form oil pressure damping clearance, form tensioning ware high pressure chest between plunger and casing, the constant voltage control valve on form main through -hole and first through -hole respectively, first through -hole communicates with each other with tensioning ware high pressure chest, constant voltage control valve fixed mounting is in tensioning ware high pressure chest, reset spring installs between constant voltage control valve and plunger. The utility model discloses in being applied to engine timing transmission system, when the sudden change of engine operating mode and the oil head in making tensioning ware high pressure chest when being higher than the setting value, the tensioning ware can in time carry out automatic pressure release to guarantee that the pressure in the tensioning ware high pressure chest is in the constant voltage state, be favorable to reducing the friction loss of engine timing transmission system during operation, and improve engine timing transmission system's working life and fuel economy.
Description
Technical field
This utility model is related to timing chain tensioner technical field, more particularly, to a kind of timing with constant-pressure control valve
Chain tensioning device.
Background technology
Timing chain tensioner is widely used in the correct time chain driving system of electromotor, and it passes through internal hydraulic pressure power
Vibratory impulse in buffer chain transmission process, to reduce drive system in impacting of being subject to of each part, extend timing transmission system
The service life of system, it is ensured that transmission it is accurate with it is reliable, and reduce drive noise, improve the comfortableness driven.
But, in the engine timing chain drive system course of work, if engine operating condition is mutated, timing chain
Plunger in stretcher by severe impact, will make the high pressure intracavity of timing chain tensioner produce continuous high-pressure, the high pressure pressure
If power cannot discharge in time, great reversed load will be produced to timing chain, guide rail.Because guide rail of the prior art leads to
It is often to adopt made of plastic, its abrasion resistance and heat-resisting quantity are all far below timing chain made by metal, therefore, if started
Machine correct time chain driving system is chronically under this operating mode of big shock loading and works, will make guide rail rubbed out groove or
Rugged surface, so as to cause following consequence：
(1) guidance quality for, making guide rail is deteriorated, and then makes vibration aggravation of the timing chain in transmission, is causing electromotor just
When chain transmission system operating mode it is more unstable.
(2), subtract the abrasion aggravation of timing chain, guide rail, the working life for causing engine timing chain drive system
It is short.
(3), timing chain is elongated because of abrasion, it is possible that jumping tooth or risk of breakage, makes engine stop work
Or damage.
(4), timing chain will cause the output of electromotor to decline because bearing the larger resistance of motion, so as to reduce
The fuel economy of electromotor.
Utility model content
The technical problems to be solved in the utility model is：For the problem that prior art is present, there is provided a kind of band constant pressure control
The timing chain tensioner of valve processed, when the hypertonia of stretcher high pressure intracavity, can in time carry out releasing pressure automatically, to ensure
The pressure of stretcher high pressure intracavity is in pressure constant state.
The technical problems to be solved in the utility model employs the following technical solutions to realize：It is a kind of with constant-pressure control valve just
When chain tensioning device, including housing, plunger and back-moving spring and constant-pressure control valve, the plunger and housing cavity are with merging shape
Into oil pressure damping clearance, stretcher high pressure chest is formed between plunger and housing, form main logical on the constant-pressure control valve respectively
Hole and first through hole, the first through hole is communicated with stretcher high pressure chest, and it is high that the constant-pressure control valve is fixedly mounted on stretcher
Pressure intracavity, the back-moving spring is arranged between constant-pressure control valve and plunger；When the pressure of stretcher high pressure intracavity is higher than setting
During value, the stretcher high pressure chest, pressure release passage is formed between first through hole, main through hole, and until stretcher high pressure intracavity
Pressure returns to setting value.
Preferably, described constant-pressure control valve includes being the valve seat and valve gap of hollow cavity structure, is formed on valve seat
The main through hole communicated with its inner chamber, forms the first through hole communicated with its inner chamber on valve gap, and in valve gap inner chamber valve ball is installed
And sliding seat, the fluid passage of insertion sliding seat is formed in the sliding seat, form logical with the fluid on the wall of sliding seat side
The second through hole that road is communicated；Form fixing seal structure between the valve seat and housing, between the valve gap and valve seat respectively,
Second level spring is installed between valve ball and valve gap, first order spring, and valve ball and sliding seat are installed between sliding seat and valve seat
Between, between sliding seat and valve gap respectively formed contact sealing structure.
Preferably, described constant-pressure control valve includes the valve gap of hollow cavity structure, is formed and its inner chamber phase on valve gap
Logical first through hole, main through hole, installs valve ball and sliding seat in valve gap inner chamber, and insertion sliding seat is formed in the sliding seat
Fluid passage, forms the second through hole communicated with the fluid passage on the wall of sliding seat side；Shape between the valve gap and housing
Into fixing seal structure, second level spring is installed between valve ball and valve gap, first order bullet is installed between sliding seat and housing
Formed respectively between spring, and valve ball and sliding seat, between sliding seat and valve gap and contact sealing structure.
Preferably, form the first positioning convex in the valve gap inner chamber, first positioning convex and second level spring it
Between form socket join structure.
Preferably, the outer surface of first positioning convex is formed as convex spherical structure.
Preferably, first is formed on the valve gap internal chamber wall and contacts sealing, on the sliding seat outer surface second is formed
Contact sealing, the first contact sealing is contacted with second and formed between sealing face contact sealing structure.
Preferably, the first contact sealing on the valve gap internal chamber wall is cone structure, on the sliding seat outer surface
The second contact sealing be cone structure or spherical structure.
Preferably, the sliding seat top forms the 3rd and contacts sealing, between the 3rd contact sealing and valve ball
Formation face contacts sealing structure.
Preferably, the 3rd contact sealing at the top of the sliding seat is cone structure or concave spherical surface structure.
Preferably, rigidity of the rigidity of the second level spring less than first order spring.
Compared with prior art, the beneficial effects of the utility model are：Engine timing is applied in this utility model to pass
After in dynamic system, when engine operating condition is mutated, the oil pressure of stretcher high pressure intracavity increases suddenly, makes stretcher high pressure intracavity
Pressure is higher than setting value, due to defining a pressure release passage between stretcher high pressure chest, first through hole, main through hole, is passed through
The pressure release passage, can enable the section hydraulic oil in stretcher high pressure intracavity release stretcher high pressure chest in time, so as to
The pressure for enabling stretcher high pressure intracavity discharges in time, until returning to setting value, it is ensured that the pressure of stretcher high pressure intracavity
Power is in pressure constant state, therefore, effectively prevent stretcher high pressure chest excessive to timing system generation because oil pressure is excessive
Shock loading caused by timing chain, guide rail abrasion aggravation, advantageously reduce engine timing drive system be driven when
Frictional force, increase the output of electromotor, improve the working life of engine timing drive system, and make the combustion of electromotor
Oily economy is correspondingly improved.
Description of the drawings
Fig. 1 is a kind of D structure figure of the timing chain tensioner with constant-pressure control valve of this utility model.
Fig. 2 is the sectional view of the timing chain tensioner with constant-pressure control valve shown in Fig. 1.
Fig. 3 is the D structure figure of the constant-pressure control valve in Fig. 2.
Fig. 4 is the Structure explosion diagram of the constant-pressure control valve in Fig. 2.
Fig. 5 is the sectional view of the constant-pressure control valve in Fig. 2.
Fig. 6 is the sectional view of the valve gap in the constant-pressure control valve shown in Fig. 5.
Fig. 7 is the fundamental diagram of the timing chain tensioner with constant-pressure control valve (in constant pressure working condition, embodiment party
Formula 1).
Fig. 8 is the fundamental diagram of the timing chain tensioner with constant-pressure control valve (in pressure release working condition, embodiment party
Formula 1).
Fig. 9 is the fundamental diagram of the timing chain tensioner with constant-pressure control valve (in supercharging working condition, embodiment party
Formula 1).
Figure 10 is that the fundamental diagram of the timing chain tensioner with constant-pressure control valve (in constant pressure working condition, is implemented
Mode 2).
Figure 11 is that the fundamental diagram of the timing chain tensioner with constant-pressure control valve (in pressure release working condition, is implemented
Mode 2).
Figure 12 is that the fundamental diagram of the timing chain tensioner with constant-pressure control valve (in supercharging working condition, is implemented
Mode 2).
Labelling in figure：1- housings, 2- plungers, 3- latches, 4- back-moving springs, 5- stretcher high pressure chests, 6- constant-pressure control valves,
7- stretcher fuel feed holes, 61- valve balls, 62- valve seats, 63- valve gaps, 64- first order springs, 65- sliding seat, 66- second level spring,
The main through holes of 621-, 631- first through hole, the positioning convex of 632- first, the contact sealings of 633- first, 634- flanging sealings,
651- second contacts sealing, the contact sealings of 652- the 3rd, the through holes of 653- second, the positioning convex of 654- second.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with the accompanying drawings and specifically
Embodiment is described in detail to this utility model.It should be appreciated that specific embodiment described herein is only to explain this
Utility model, is not used to limit this utility model.
Embodiment 1
The timing chain tensioner with constant-pressure control valve as shown in Figure 1 and Figure 2, mainly includes housing 1, plunger 2, resets
Spring 4 and constant-pressure control valve 6, described plunger 2 to form oil pressure damping clearance with the inner chamber of housing 1 with merging, generally, the plunger
The 2 cylindrical gaps that 0.02mm-0.06mm is set and the inner chamber of housing 1 between；Stretcher is formed between the plunger 2 and housing 1 high
Pressure chamber 5, in the intracavity bottom of housing 1 constant-pressure control valve 6 is fixedly mounted, and the back-moving spring 4 is arranged on constant-pressure control valve 6 and plunger
Between 2.Wherein, the concrete structure of the constant-pressure control valve 6 is main to include being hollow cavity knot as shown in Fig. 3, Fig. 4, Fig. 5
The valve seat 62 and valve gap 63 of structure, forms the main through hole 621 communicated with its inner chamber, the main through hole 621 and housing 1 on valve seat 62
On stretcher fuel feed hole 7 communicate, the first through hole 631 that communicates with its inner chamber, the first through hole 631 are formed on valve gap 63
Communicate with stretcher high pressure chest 5；Preferably, described first through hole 631 can arrange several, several first through hole
631 preferably ring valve lids 63 are uniformly distributed.Valve ball 61 and sliding seat 65, shape in the sliding seat 65 are installed in the inner chamber of valve gap 63
Into the fluid passage of insertion sliding seat 65, the second through hole 653 communicated with the fluid passage is formed on the side wall of sliding seat 65；
Preferably, second through hole 653 can arrange several, and it is uniform that several second through holes 653 are preferably ring sliding seat 65
Distribution.
Formed by interference fit respectively between the valve seat 62 and housing 1, between the valve gap 63 and valve seat 62
Fixing seal structure；Preferably, as shown in fig. 6, the flanging sealing of integral structure is formed by flanging in the bottom of valve gap 63
634, again by interference fit formation fixing seal structure between the flanging sealing 634 and valve seat 62.In valve ball 61
Second level spring 66 is installed between valve gap 63, first order spring 64 is installed between sliding seat 65 and valve seat 62.Described valve
Formed respectively between ball 61 and sliding seat 65, between sliding seat 65 and valve gap 63 and contact sealing structure, that is, when valve ball 61 and living
When contacting with each other between dynamic seat 65, valve ball 61 covers the fluid passage in sliding seat 65, now, valve ball 61 and sliding seat 65 it
Between the position that contacts with each other form sealing state, and when valve ball 61 and sliding seat 65 are separated from each other, valve ball 61 and sliding seat 65
Between sealing state release.Similarly, when contacting with each other between sliding seat 65 and valve gap 63, in valve gap 63 and sliding seat 65
Between the position that contacts with each other form sealing state, and when valve gap 63 and sliding seat 65 are separated from each other, valve gap 63 and sliding seat
Sealing state between 65 is released.
The above-mentioned timing chain tensioner with constant-pressure control valve is applied in engine timing chain drive system, is led to
Often, before stretcher is installed, coordinated using latch 3 and housing 1 and eject limiting plunger 2, as shown in Fig. 2 pacifying in stretcher
After being attached to position, latch 3 is pulled out, plunger 2 is ejected under the resilient force of back-moving spring 4 relative to housing 1, and hold out against and start
Guide rail in machine correct time chain driving system and reach working condition.In the engine timing chain drive system course of work,
Engine motor oil enters stretcher from stretcher fuel feed hole 7, the effect of vibration produced by drive system on plunger 2, the post
The motion of plug 2 is reciprocating motion.
During engine work, between the valve ball 61 and sliding seat 65, between sliding seat 65 and valve gap 63
Contact sealing state is formed respectively, and now, engine motor oil will not enter stretcher high pressure chest 5 from stretcher fuel feed hole 7, such as scheme
Shown in 7.But, when engine operating condition mutation, when plunger 2 is moved backward relative to housing 1, the volume of stretcher high pressure chest 5 becomes
It is little, and malleation is produced, the pressure in stretcher high pressure chest 5 is increased suddenly, when the pressure in stretcher high pressure chest 5 is higher than setting value
When, the hydraulic oil in stretcher high pressure chest 5 is by first through hole 631 and promotes valve ball 61 to move down relative to housing 1, then by
Valve ball 61 promotes sliding seat 65 and compresses first order spring 64, and sliding seat 65 moves down and depart from valve gap 63 relative to housing 1,
Now, the sealing state between valve ball 61 and sliding seat 65 is remained in that, and the sealing state between sliding seat 65 and valve gap 63
Then release, therefore, a pressure release passage is defined between stretcher high pressure chest 5, first through hole 631, main through hole 621, it is tensioned
Machine oil in device high pressure chest 5 is able to flow through gap, the second through hole between first through hole 631, sliding seat 65 and valve gap 63 successively
653 and the fluid passage that enters in sliding seat 65, then released by main through hole 621, as shown in figure 8, so that stretcher high pressure
Oil pressure in chamber 5 declines, until setting value is returned to, to ensure that the pressure in stretcher high pressure chest 5 is in pressure constant state.
When engine operating condition mutation, when plunger 2 travels forward relative to housing 1, the volume of stretcher high pressure chest 5 becomes big,
Pressure drop, when the pressure in stretcher high pressure chest 5 is less than setting value, engine motor oil is entered from stretcher fuel feed hole 7 to be opened
Tight device, and enter valve gap 63 by main through hole 621, promotes sliding seat 65 to move up relative to housing 1, until sliding seat 65 with
Recover sealing state between valve gap 63, engine motor oil after valve ball 61 is backed down, valve ball 61 compression second level spring 66 and it is relative
Move up in housing 1, release the sealing state between valve ball 61 and sliding seat 65, therefore, engine motor oil be able to through
Fluid passage in the sliding seat 65 and gap between valve ball 61 and sliding seat 65 is flowed in stretcher high pressure chest 5, such as Fig. 9
It is shown, so that the oil pressure in stretcher high pressure chest 5 is persistently raised, until setting value is returned to, to ensure stretcher high pressure chest 5
Interior pressure is in pressure constant state.
Embodiment 2
Compared with embodiment 1, as shown in Figure 10, Figure 11, Figure 12, described constant-pressure control valve 6 eliminates valve seat 62,
First through hole 631, the main through hole 621 communicated with its inner chamber is formed on valve gap 63, between sliding seat 65 and housing 1 first is installed
Level spring 64；Fixing seal structure is formed by interference fit between the valve gap 63 and housing 1；Preferably, such as Fig. 6 institutes
Show, the bottom of the valve gap 63 forms the flanging sealing 634 of integral structure by flanging operation, the flanging sealing
634 form fixing seal structure between housing 1 by interference fit again.Remaining is with embodiment 1.Due to eliminating valve
Seat 62, therefore, the structure of the constant-pressure control valve 6 of present embodiment is simpler, and its implementation cost is also lower.
In the course of work of constant-pressure control valve 6, in order to strengthen the kinetic stability of valve ball 61, and make second level spring 66,
The force value change of first order spring 64 is more steady, and the first positioning convex 632 can be formed in the inner chamber of valve gap 63, it is preferable that
The outer surface of the first described positioning convex 632 is formed as convex spherical structure, as shown in fig. 6, first positioning convex 632 with
Socket join structure is formed between second level spring 66, such that it is able to be efficiently located to second level spring 66, spacing.In addition,
The second positioning convex 654 can be formed in the bottom of sliding seat 65, it is preferable that second positioning convex 654 adopts hollow circuit cylinder
Body structure, forms socket join structure, as shown in Figure 4, Figure 5, with more preferable between second positioning convex 654 and first order spring 64
Ground first order spring 64 is efficiently located, it is spacing.
In order to strengthen the sealing property of constant-pressure control valve 6, the control accuracy of constant-pressure control valve 6 is improved, can be in valve gap 63
First is formed on internal chamber wall and contacts sealing 633, as shown in fig. 6, second is formed on the outer surface of sliding seat 65 contacts sealing
651, and the first contact sealing 633 contacts contact sealing structure in formation face between sealing 651 with second, as shown in Figure 5.It is excellent
Selection of land, the first contact sealing 633 is designed as cone structure, and the second contact sealing 651 is designed as cone structure
Or spherical structure.Similarly, form the 3rd at the top of sliding seat 65 and contact sealing 652, the 3rd contact sealing 652
Face is formed between valve ball 61 and contacts sealing structure.Preferably, it is described 3rd contact sealing 652 be designed as cone structure or
Concave spherical surface structure.In order to further improve the control accuracy of constant-pressure control valve 6, opening between the valve ball 61 and sliding seat 65
Open gap and it is preferably provided as 0.2mm-0.6mm, the rigidity of described second level spring 66 is preferably less than first order spring 64
Rigidity；In addition, after using such structure design, can also well prevent the timing chain tensioner with constant-pressure control valve
Shift to an earlier date pressure release in the course of the work, so that it is guaranteed that the pressure in stretcher high pressure chest 5 is in pressure constant state.
Preferred embodiment of the present utility model is the foregoing is only, not to limit this utility model, should be referred to
Go out, all any modification, equivalent and improvement made within spirit of the present utility model and principle etc. all should be included
Within protection domain of the present utility model.
Claims (10)
1. a kind of timing chain tensioner with constant-pressure control valve, including housing (1), plunger (2) and back-moving spring (4), it is described
Plunger (2) to form oil pressure damping clearance with housing (1) inner chamber with merging, and stretcher is formed between plunger (2) and housing (1) high
Pressure chamber (5), it is characterised in that：Also include constant-pressure control valve (6), on the constant-pressure control valve (6) main through hole (621) is formed respectively
With first through hole (631), the first through hole (631) communicates with stretcher high pressure chest (5), and the constant-pressure control valve (6) is fixed
In stretcher high pressure chest (5), the back-moving spring (4) is between constant-pressure control valve (6) and plunger (2)；When
When pressure in tight device high pressure chest (5) is higher than setting value, the stretcher high pressure chest (5), first through hole (631), main through hole
(621) pressure release passage is formed between, and until the pressure in stretcher high pressure chest (5) returns to setting value.
2. the timing chain tensioner with constant-pressure control valve according to claim 1, it is characterised in that：Described constant pressure control
Valve (6) processed includes the valve seat (62) and valve gap (63) that are hollow cavity structure, is formed on valve seat (62) and is communicated with its inner chamber
Main through hole (621), the first through hole (631) that communicates with its inner chamber is formed on valve gap (63), the peace in valve gap (63) inner chamber
Dress valve ball (61) and sliding seat (65), form the fluid passage of insertion sliding seat (65), in sliding seat on the sliding seat (65)
(65) the second through hole (653) communicated with the fluid passage is formed on the wall of side；Between the valve seat (62) and housing (1), institute
State and form fixing seal structure respectively between valve gap (63) and valve seat (62), between valve ball (61) and valve gap (63) second is installed
Level spring (66), installs first order spring (64), and valve ball (61) and sliding seat between sliding seat (65) and valve seat (62)
(65) formed respectively between, between sliding seat (65) and valve gap (63) and contact sealing structure.
3. the timing chain tensioner with constant-pressure control valve according to claim 1, it is characterised in that：Described constant pressure control
Valve (6) processed includes the valve gap (63) of hollow cavity structure, and the first through hole communicated with its inner chamber is formed on valve gap (63)
(631), main through hole (621), installs valve ball (61) and sliding seat (65), shape on the sliding seat (65) in valve gap (63) inner chamber
Into the fluid passage of insertion sliding seat (65), the second through hole communicated with the fluid passage is formed on the wall of sliding seat (65) side
(653)；Fixing seal structure is formed between the valve gap (63) and housing (1), is installed between valve ball (61) and valve gap (63)
Second level spring (66), installs first order spring (64), and valve ball (61) and sliding seat between sliding seat (65) and housing (1)
(65) formed respectively between, between sliding seat (65) and valve gap (63) and contact sealing structure.
4. the timing chain tensioner with constant-pressure control valve according to claim 2 or 3, it is characterised in that：The valve
The first positioning convex (632), shape between first positioning convex (632) and second level spring (66) are formed in lid (63) inner chamber
Into socket join structure.
5. the timing chain tensioner with constant-pressure control valve according to claim 4, it is characterised in that：First positioning
The outer surface of raised (632) is formed as convex spherical structure.
6. the timing chain tensioner with constant-pressure control valve according to claim 2 or 3, it is characterised in that：The valve
First being formed on lid (63) internal chamber wall and contacting sealing (633), the second contact sealing is formed on sliding seat (65) outer surface
Portion (651), first contact sealing (633) is contacted with second and formed between sealing (651) face contact sealing structure.
7. the timing chain tensioner with constant-pressure control valve according to claim 6, it is characterised in that：The valve gap (63)
The first contact sealing (633) on internal chamber wall is cone structure, the second contact sealing on sliding seat (65) outer surface
Portion (651) is cone structure or spherical structure.
8. the timing chain tensioner with constant-pressure control valve according to claim 2 or 3, it is characterised in that：The work
Dynamic seat (65) top forms the 3rd and contacts sealing (652), is formed between the 3rd contact sealing (652) and valve ball (61)
Face contacts sealing structure.
9. the timing chain tensioner with constant-pressure control valve according to claim 8, it is characterised in that：The sliding seat
(65) the 3rd contact sealing (652) at the top of is cone structure or concave spherical surface structure.
10. the timing chain tensioner with constant-pressure control valve according to claim 2 or 3, it is characterised in that：Described
Rigidity of the rigidity of two-level spring (66) less than first order spring (64).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621190108.2U CN206130011U (en) | 2016-10-31 | 2016-10-31 | Take timing chain tensioning ware of constant voltage control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621190108.2U CN206130011U (en) | 2016-10-31 | 2016-10-31 | Take timing chain tensioning ware of constant voltage control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206130011U true CN206130011U (en) | 2017-04-26 |
Family
ID=58578538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621190108.2U Active CN206130011U (en) | 2016-10-31 | 2016-10-31 | Take timing chain tensioning ware of constant voltage control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206130011U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106438884A (en) * | 2016-10-31 | 2017-02-22 | 绵阳富临精工机械股份有限公司 | Timing chain tensioner with constant pressure control valve |
| CN111188821A (en) * | 2018-11-14 | 2020-05-22 | 舍弗勒技术股份两合公司 | Chain tensioner |
-
2016
- 2016-10-31 CN CN201621190108.2U patent/CN206130011U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106438884A (en) * | 2016-10-31 | 2017-02-22 | 绵阳富临精工机械股份有限公司 | Timing chain tensioner with constant pressure control valve |
| CN111188821A (en) * | 2018-11-14 | 2020-05-22 | 舍弗勒技术股份两合公司 | Chain tensioner |
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Address after: 621000 No. 268, Banqiao street, Fucheng District, Mianyang City, Sichuan Province Patentee after: Mianyang Fulin Jinggong Co.,Ltd. Address before: 621000 No. 268, Banqiao street, Fucheng District, Mianyang City, Sichuan Province Patentee before: MIANYANG FULIN PRECISION MACHINING Co.,Ltd. |