CN107975573B - Tensioning wheel with bidirectional adjusting function and engine front end wheel system - Google Patents
Tensioning wheel with bidirectional adjusting function and engine front end wheel system Download PDFInfo
- Publication number
- CN107975573B CN107975573B CN201711193277.0A CN201711193277A CN107975573B CN 107975573 B CN107975573 B CN 107975573B CN 201711193277 A CN201711193277 A CN 201711193277A CN 107975573 B CN107975573 B CN 107975573B
- Authority
- CN
- China
- Prior art keywords
- wheel
- generator
- tensioning
- belt
- tension
- 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.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
- F16H7/12—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
- F16H7/1209—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley with vibration damping means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
The invention provides a tensioning device with a bidirectional adjusting function, which comprises a tensioning wheel, a tensioning wheel body, an idler wheel and a swinging arm. There is the arc track on the take-up pulley body, and the swing arm moves in the arc track of take-up pulley body, and take-up pulley and idler are fixed in the assembly of swing arm both ends. The tensioning device is located the generator belt wheel outside, is pressed respectively on generator belt entering section and generator belt output section by take-up pulley and idler, is about to the generator belt wheel and encloses in the centre, and the arc track of take-up pulley body is with the circular arc that takes the generator belt wheel as the center, and the swing arm can be around generator center arc swing. The invention achieves the purpose of adjusting the wrap angle of the idler pulley and the belt wheel by the swinging arm sliding in the tensioning wheel body, can adapt to the tension of the belts at two sides of the generator under the condition that the pressure F provided by the tensioning wheel is constant, and avoids the condition that the tension of the belt of the front-end wheel system is 0.
Description
Technical Field
The invention belongs to automobile engine parts, is applied to a front-end wheel system with a belt start-stop function (BSG), and particularly relates to an engine tensioning device.
Background
The engine tension pulley is mainly applied to a front-end gear train of an engine, can automatically tension a front-end gear train belt, compensates the tolerance of the gear train and the elongation rate of the belt, and can partially absorb the vibration transmitted by a crankshaft belt pulley in the running process of the engine. The automobile engine is an important part of an automobile, and the durability of the automobile engine is directly related to the normal operation of parts such as a water pump, a compressor, a generator and the like and the NVH performance of the engine.
As shown in fig. 1 and 2, the conventional engine tensioner mainly comprises a cup body 1, a spring assembly inside the cup body 1, a tensioner bolt 2, a tensioner arm 3, and a pulley 4. The tensioning wheel spring assembly provides a spring torque, and pressure is formed on the front end wheel train belt 14 through the tensioning arm 3 and the belt wheel 4, so that the front end wheel train belt 14 has certain tension, and the belt transmission requirement is met. When the length of the belt 14 of the front end gear train changes or the crankshaft vibrates, the tensioning arm 3 can automatically swing, so that the whole gear train has relatively constant tensioning force in the dynamic motion process.
With the stricter and stricter national oil consumption requirements, whether the oil consumption meets the requirements for determining whether the vehicle can be continuously sold or not is determined, so that the reduction of the oil consumption of the whole vehicle becomes a primary task of each host factory. The 48V belt start-stop system (BSG) can reduce oil consumption by more than 10 percent, is a key research technology of various main engine plants in China, but a generator driven by a front-end wheel train belt has the functions of a generator and a driving motor. The 48V belt start-stop system (BSG) front end pulley system has the following characteristics relative to the traditional belt transmission:
firstly, the torque transmitted by a belt of a front-end wheel train is large, and the maximum torque of a generator reaches 50 N.m;
secondly, the power transmission of the front-end wheel train is bidirectional, namely the power can be transmitted to the generator from the engine and can also be transmitted to the engine from the generator.
And the functions that the front-end wheel train can realize are more and more complex.
Based on the above background, the tensioner of the prior art has a major defect when applied to a belt start-stop train (BSG), as shown in fig. 2, when the generator pulley 17 is in a power generation function, the generator belt entry section 19 is a tight edge (relative to the belt on the other side of the generator pulley), the generator belt output section 18 is a loose edge, and at this time, the tension F provided by the engine tensioner for the front end train is the lowest tension of the train system, and the front end train system meets the operation requirement. However, when the generator pulley 17 is in the boost or start condition, the generator belt entry segment 19 is loose-edged (relative to the belt on the other side of the generator pulley) and the generator belt exit segment 18 is tight-edged, and the tension F provided by the engine tensioner is the tension of the belt exit segment 18. Assuming that the motor torque is T17, the pressure provided by the tension pulley is F, the tension of the generator belt entrance section 19 is F19, the tension of the generator belt output section 18 is F18, the generator radius is R, and the wrap angle of the belt pulley 4 is γ (γ swing amplitude is small), when the generator is in the boosting condition, theoretically, the following relationships exist:
(vii) F19 ═ F (pulley 4 wrap angle γ);
②
according to the requirement of train wheel performance, the condition that 0 tension exists in the belt is not allowed, and if F18 is ensured to be more than or equal to 0N, the pressure F provided by an engine tension wheel is required to be increased to a very high level. The influence on the service life of parts such as a generator, a belt, a tension pulley, a water pump and the like in the front-end gear train is very large.
Disclosure of Invention
The invention aims to provide a tension pulley with a function of bidirectionally adjusting the tension of a front-end wheel train and an engine front-end wheel train, which can adjust the tension of a generator belt inlet section F19 and a generator belt outlet section F18 under different working conditions so as to meet the requirements of a generator on the front-end wheel train under different working states of power assistance, power generation and the like.
The technical scheme of the invention is as follows:
a tensioning device with a bidirectional adjusting function comprises a tensioning wheel, a tensioning wheel body, an idler wheel and a swinging arm.
The tensioning wheel body is a base body of the whole tensioning wheel and is a part connected with an external part, and an arc-shaped track is arranged on the tensioning wheel body and serves as a motion track of the swing arm.
The swing arm is located the arc track of take-up pulley body to can move wherein, fixed take-up pulley and idler are assembled at the swing arm both ends.
The tensioning device is located outside the generator belt wheel, and is pressed on the generator belt entering section and the generator belt output section respectively by a tensioning wheel and an idler wheel, namely the generator belt wheel is enclosed in the middle, the arc-shaped track of the tensioning wheel body is an arc taking the generator belt wheel as the center, and the swing arm can swing around the center of the generator in an arc shape.
When the motor torque is T17, the pressure provided by the tension pulley is F, the tension of the generator belt entering section is F19, the tension of the generator belt outputting section is F18, the generator radius is R, the wrap angle of the belt wheel 4 is gamma, and the wrap angle of the idler wheel 7 is alpha, the tension device satisfies the following relations:
f19 ═ F (γ) — when γ increases, F (γ) decreases, and vice versa;
f18 ═ F (α) — when α increases, F (α) decreases, and vice versa.
The tensioning device is mainly applied to a 48V belt start-stop (BSG) front-end wheel train, the posture of the tensioning device can be adjusted according to the working condition of the generator, and no matter what working condition the generator is in, the tension F provided by the tensioning wheel is equal to the tension of loose edges in the belts on two sides of the generator. When the generator is in the power generation working condition, F is the tension F19 of the generator belt entering section 19; when the generator is handling the boost condition, F is the tension F18 of the generator belt output section 18. The lowest tension in the front end wheelset system is made to be F, but the value of F is not increased. The stress of the whole wheel train is controlled at a reasonable level.
Furthermore, the tensioning device also comprises a damping ring which is fixed on the swing arm, and in the motion process of the swing arm, damping force is provided between the swing arm and the tensioning wheel body. The damping ring comprises an upper ring and a lower ring, which are buckled on the swing arm from the upper part and the lower part respectively to wrap the swing arm, the damping ring is in overall contact with the inner cavity of the tensioning wheel body, and most of the damping ring is wrapped by the tensioning wheel body. The swing arm is provided with two clamping grooves for fixing the damping ring.
Further, the tensioning wheel comprises a cup body, a spring assembly inside the cup body, a tensioning arm and a belt wheel, the belt wheel is assembled at one end of the tensioning arm, the other end of the tensioning arm is connected with the cup body, the tensioning arm swings around the center of the cup body, the spring assembly of the tensioning wheel provides spring torque, and pressure is formed on an entering section of a generator belt through the tensioning arm and the belt wheel.
Further, the idler wheel is directly installed on a threaded hole provided by the swing arm, provides a larger wrap angle for the generator belt wheel together with the belt wheel, and forms a coupling structure with the belt wheel.
Furthermore, the tensioning wheel body is provided with a mounting hole, and the tensioning wheel is fixed on the front end cover of the generator belt wheel through the mounting hole.
The invention also provides an engine front end gear train which comprises a generator belt wheel, a generator belt and a tensioning device, wherein the tensioning device is fixed on the front end cover of the generator belt wheel and positioned outside the generator belt wheel, the tensioning device and an idler wheel are respectively pressed on the generator belt input section and the generator belt output section, the purpose of adjusting the wrap angle of the idler wheel and the belt wheel is achieved by sliding the swing arm in the tensioning wheel body, the tension of the belt on two sides of the generator can be adapted under the condition that the pressure F provided by the tensioning wheel is constant, and the condition that the tension of the belt of the front end gear train is 0 is avoided.
Compared with the prior art, the invention has the following advantages:
1. this overspeed device tensioner's take-up pulley can slide in the take-up pulley body through the swing arm and reach the purpose of adjustment idler and band pulley cornerite, provides under the invariable condition of pressure F at the take-up pulley, can adapt to the generator both sides belt tension size, has avoided the front end wheel to be belt tension the condition of 0 tension appears.
2. The tensioning wheel of the tensioning device can still meet the requirement that the front end wheel system transmits larger power and torque under the condition of lower pressure F provided by the tensioning wheel, and compared with the traditional tensioning wheel, the front end wheel system applying the tensioning wheel 20 is greatly reduced in stress, so that the service life of each part (a generator, a compressor, a water pump, an idler wheel and the like) of the front end wheel system is obviously prolonged.
3. Because the two belt wheels of the tension wheel of the tension device clamp the generator belt wheel in the middle, a very large wrap angle is provided for the generator belt wheel, the slipping of a front-end wheel train belt on the generator belt wheel is reduced, and the performance requirement of a wheel train is met.
4. After the tensioning device is installed on a generator shell, under the running condition of an engine, the generator belt inlet section is longer, the generator belt inlet section can be properly adjusted within a certain range according to general arrangement and design requirements, the generator belt outlet section is relatively shorter, and the generator belt inlet and outlet section has good NVH (noise vibration and harshness) performance.
5. This overspeed device tensioner has the plastics damping original paper owing to there is the swing arm, and the swing arm has certain damping force at the swing in-process, can reduce system vibration. Meanwhile, the damping ring is in overall contact with the tensioning wheel body, each surface of the inner cavity of the tensioning wheel body is in contact with the damping ring, and the diameter of the damping ring is larger, so that the contact area of the damping ring and the tensioning wheel body is larger than that of the existing bidirectional tensioning device. This allows for a longer life of the damping ring, while also allowing the damping to be designed larger.
6. Most of the damping ring of the tensioning device is wrapped by the tensioning wheel body, the damping ring 8 can be lightened to be polluted by external muddy water, particularly, a kinematic pair (the damping ring 8 is in contact with the cavity of the tensioning wheel body) is arranged in the cavity, the service life of the damping ring can be effectively prolonged, and meanwhile, the bidirectional tensioning device has good environmental adaptability.
Drawings
FIG. 1 is a schematic diagram of a prior art engine tensioner.
Fig. 2 is a schematic diagram of a prior art front end wheel train arrangement.
Fig. 3 is a schematic view of the tensioner of the present invention.
Figure 4 is an exploded view of the tensioner of the present invention.
Fig. 5 is a schematic diagram of a nominal position of a front wheel train for use in the tensioner of the present invention.
FIG. 6 is a schematic diagram of the front end train power generation and energy recovery operation mode of the tensioner of the present invention.
Fig. 7 is a schematic diagram of a front end train power-assisted, start-up condition for the tensioner of the present invention.
In the figure: 1-cup body, 2-tensioning wheel bolt, 3-tensioning arm, 4-belt wheel, 5-tensioning wheel body, 6-mounting bolt, 7-idler wheel, 8-damping ring, 9-swinging arm, 10-groove, 11-mounting hole, 12-arc track, 13-threaded hole, 14-belt, 15-crankshaft belt wheel, 16-idler wheel assembly, 17-generator belt wheel, 18-generator belt output section, 19-generator belt input section, and 20-tensioning wheel.
Detailed Description
The structure of the invention is further explained in the following with the attached drawings:
as shown in fig. 3 and 4, the tensioner of the present invention comprises a tensioner 20, a tensioner body 5, two mounting bolts 6, an idler 7, two damping rings 8, and a swing arm 9.
The tensioning wheel 20 can adopt a common mechanical tensioning wheel, namely comprises a cup body 1, a spring assembly inside the cup body 1, a tensioning arm 3 and a belt wheel 4. One end of the tensioning arm 3 is provided with the belt wheel 4, the other end of the tensioning arm is connected with the cup body 1, the tensioning arm 3 swings around the center of the cup body 1, the tensioning wheel spring assembly provides spring torque, and pressure is formed on the generator belt inlet section 19 through the tensioning arm 3 and the belt wheel 4.
The tension pulley body 5 is a base body of the whole tension pulley, is a part connected with external parts, is provided with two mounting holes 11, and is fixed on a front end cover of the generator 17 through the mounting holes 11; the tensioner body 5 has an arcuate track 12 as a track for the movement of the swing arm 9.
The swing arm 9 is a key part for transmitting pressure F by the tension wheel and adjusting wrap angles of two belt wheels on the tension wheel, moves in an arc-shaped track 12 in the tension wheel body 5, and two clamping grooves 10 are processed on the swing arm 9 and used for fixing the damping ring 8; meanwhile, two threaded holes 13 are processed on the swing arm 9 and used for assembling and fixing the common mechanical tension pulley and the idler pulley 7.
Damping ring 8 is including fitting with a contraceptive ring and lower ring, detains on swing arm 9 from top and below respectively, the parcel swing arm, damping ring 8 and the 5 inner chambers of take-up pulley body contact comprehensively to most are lived by the 5 parcel of take-up pulley body, and in swing arm 9 motion process, damping ring 8 provides the wearing and tearing medium between swing arm 9 and take-up pulley body 5, and the main function is wear resistance and provides certain damping force in guaranteeing the 20 life cycle of take-up pulley.
The mounting bolt 6 secures the idler pulley 7 and the mechanical tensioner to the swing arm 9.
The idler wheel 7 is mounted directly on a threaded hole 13 provided in the swing arm 9, and together with the pulley 4 provides a large wrap angle for the generator 17, while forming a kind of coupling structure with the pulley 4.
The tensioning device is applied to a 48V belt start-stop (BSG) front-end wheel train, is fixed on a front end cover of a generator belt wheel 17 and is positioned outside the generator belt wheel, and is pressed on a generator belt input section 19 and a generator belt output section 18 by a tensioning wheel 20 and an idler wheel 7, namely, the generator belt wheel is clamped between the tensioning wheel and the generator belt input section 19. The tensioning device has two degrees of freedom of movement, one: the swing arm 9 is directly assembled in an arc-shaped track 12 in the tension pulley body 5 and can swing around the center of a generator belt pulley 17 in an arc shape; and a second degree of freedom of motion: the tensioning arm 3 of a common mechanical tensioning wheel swings around the center of the cup body 1.
During engine operation, idler pulley 20 provides the same pressure to idler pulley 7 and pulley 4, but swing arm 9 of idler pulley 20 can swing around the motor center, so that the wrap angle of idler pulley 7 and pulley 4 dynamically changes to adapt to the change of the slack side and tight side of generator belt inlet section 19 and generator belt outlet section 18. Assuming that the motor torque is T17, the tension applied by the tension pulley is F, the tension applied by the generator belt input section 19 is F19, the tension applied by the generator belt output section 18 is F18, the generator radius is R, the wrap angle of the pulley 4 is γ, and the wrap angle of the idler pulley 7 is α, the following relationships exist:
F19F (γ) -when γ increases, F (γ) decreases, and vice versa.
F18 ═ F (α) — when α increases, F (α) decreases, and vice versa.
When the power generation is in the working condition, see FIG. 6:
When boost or start-up conditions, see fig. 7:
Based on the theory, the tensioning device can adjust the wrap angle of the idler pulley 7 and the belt pulley 4 by sliding the swing arm 9 in the tensioning wheel body 5 under the condition that the tensioning wheel provides constant F, so that the purposes of adjusting the tension of the generator belt entering section F19 and the generator belt outputting section F18 under different working conditions are achieved. The requirements of the generator on the front-end wheel train under different working states of power assistance, power generation and the like are met.
Claims (6)
1. A tensioning device with a bidirectional adjusting function comprises a tensioning wheel (20), and is characterized by further comprising a tensioning wheel body (5), an idler wheel (7) and a swing arm (9);
the tensioning wheel body (5) is a base body of the whole tensioning wheel and is a part connected with external parts, and an arc-shaped track (12) is arranged on the tensioning wheel body (5) and is used as a motion track of the swing arm (9);
the swing arm (9) is positioned in the arc-shaped track (12) of the tensioning wheel body (5) and can move in the arc-shaped track, and a tensioning wheel (20) and an idler wheel (7) are assembled and fixed at two ends of the swing arm (9);
the tensioning device is positioned on the outer side of a generator belt wheel, a tensioning wheel (20) and an idler wheel (7) are respectively pressed on a generator belt inlet section (19) and a generator belt output section (18), namely the generator belt wheel is surrounded in the middle, an arc track (12) of a tensioning wheel body (5) is an arc taking the generator belt wheel as a center, a swing arm can swing around the center of the generator belt wheel (17) in an arc shape, the arm lengths of two ends of the swing arm (9) are different, and one end of the assembly tensioning wheel (20) is longer than one end of the assembly idler wheel (7);
the damping device also comprises a damping ring (8) which is fixed on the swing arm (9) through a buckle, and in the motion process of the swing arm, damping force is provided between the swing arm (9) and the tensioning wheel body (5);
when the motor torque is T17, the pressure provided by the tension pulley is F, the tension of the generator belt inlet section (19) is F19, the tension of the generator belt output section (18) is F18, the radius of the generator belt wheel is R, the wrap angle of the belt wheel (4) is gamma, and the wrap angle of the idle wheel (7) is alpha, the tension device meets the following relations:
f19= F (γ) — when γ increases, F (γ) decreases, and vice versa;
f18= F (α) — when α increases, F (α) decreases, and vice versa;
the damping ring (8) comprises an upper ring and a lower ring, the upper ring and the lower ring are buckled on the swing arm (9) from the upper part and the lower part respectively to wrap the swing arm, the damping ring (8) is in overall contact with the inner cavity of the tensioning wheel body (5), and most of the damping ring is wrapped by the tensioning wheel body (5);
the tension pulley (20) comprises a cup body (1), a spring assembly inside the cup body, a tension arm (3) and a belt wheel (4), the belt wheel (4) is assembled at one end of the tension arm (3), the other end of the tension arm is connected with the cup body (1), the tension arm (3) swings around the center of the cup body (1), spring torque is provided by the tension pulley spring assembly, and pressure is formed on a generator belt entering section (19) through the tension arm (3) and the belt wheel (4).
2. The tensioner with bidirectional adjustment function according to claim 1, characterized in that the swing arm (9) has two slots (10) for fixing the damping ring (8).
3. Tensioner according to claim 1 or 2, characterised in that the idle wheel (7) is mounted directly in a threaded hole (13) provided in the oscillating arm (9) and provides, together with the pulley (4), a large angle of wrap for the generator pulley (17) and forms a coupling with the pulley (4).
4. The tensioner device with bidirectional adjustment function according to claim 1 or 2, characterized in that the tensioner body (5) has a mounting hole (11), and the tensioner (20) is fixed to the front end cover of the generator pulley (17) through the mounting hole (11).
5. The reversible tensioner as claimed in claim 1 or 2, wherein the tensioner is used in a 48V belt start stop (BSG) nose train.
6. An engine front end wheel train comprises a generator belt wheel, a generator belt and a tensioning device, wherein the tensioning device is provided with the tensioning device with the bidirectional adjusting function according to any one of claims 1 to 5, the tensioning device is fixed on a front end cover of the generator belt wheel (17) and is positioned outside the generator belt wheel, the tensioning device is respectively pressed on a generator belt inlet section (19) and a generator belt output section (18) by a tensioning wheel (20) and an idler wheel (7), the wrapping angles of the idler wheel (7) and the belt wheel (4) are adjusted by sliding a swing arm (9) in a tensioning wheel body (5), and under the condition that pressure F provided by the tensioning wheel is constant, the tension of the belt on two sides of a generator can be adapted, and the condition that the tension of the belt of the front end wheel train is 0 is avoided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711193277.0A CN107975573B (en) | 2017-11-24 | 2017-11-24 | Tensioning wheel with bidirectional adjusting function and engine front end wheel system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711193277.0A CN107975573B (en) | 2017-11-24 | 2017-11-24 | Tensioning wheel with bidirectional adjusting function and engine front end wheel system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107975573A CN107975573A (en) | 2018-05-01 |
| CN107975573B true CN107975573B (en) | 2021-05-04 |
Family
ID=62011609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711193277.0A Active CN107975573B (en) | 2017-11-24 | 2017-11-24 | Tensioning wheel with bidirectional adjusting function and engine front end wheel system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107975573B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11333223B2 (en) * | 2019-08-06 | 2022-05-17 | Gates Corporation | Orbital tensioner |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6960145B2 (en) * | 2002-08-30 | 2005-11-01 | Trw, Inc. | Belt tensioner for electric power steering unit |
| DE102005008580A1 (en) * | 2004-02-27 | 2005-09-22 | Litens Automotive Partnership, Woodbridge | Motor vehicle internal combustion engine belt tensioner has position sensor to register angular position of swinging arm relative to shaft, and generates output signal which corresponds to angular position |
| US20150308545A1 (en) * | 2014-04-28 | 2015-10-29 | The Gates Corporation | Orbital tensioner |
| CN205780649U (en) * | 2016-06-21 | 2016-12-07 | 宁波丰茂远东橡胶有限公司 | A kind of bi-directional association and the two-way tensioner of belt variable damping unit |
| CN106090156B (en) * | 2016-06-21 | 2018-12-04 | 宁波丰茂远东橡胶有限公司 | A kind of two-way tensioning apparatus of bi-directional association and belt variable damping unit |
| CN106122400B (en) * | 2016-08-29 | 2019-01-18 | 莱顿汽车部件（苏州）有限公司 | A kind of Dual directional tightener and automobile engine system applied to BSG train |
| CN107013642B (en) * | 2017-06-05 | 2023-05-23 | 青岛泰德汽车轴承股份有限公司 | Automatic tensioning device for semicircular sliding belt |
-
2017
- 2017-11-24 CN CN201711193277.0A patent/CN107975573B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107975573A (en) | 2018-05-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9631563B2 (en) | Torque pulse dampener | |
| US8973463B2 (en) | Recessed belt damper | |
| CN107076278B (en) | Endless drive and improved two-arm tensioning system for an endless drive | |
| KR102284637B1 (en) | tensioner | |
| CN106461033B (en) | Belt transmission system | |
| CN101346567A (en) | Traction mechanism drive for an internal combustion engine | |
| CN107975573B (en) | Tensioning wheel with bidirectional adjusting function and engine front end wheel system | |
| CN103925304B (en) | One-way clutch decoupler for transmitting torque between belt pulley and axis | |
| GB2277359A (en) | A vibration damping and tensioning mechanism for a belt or chain drive | |
| CN210178840U (en) | Two-way relevant formula tensioning ware device | |
| CN202081972U (en) | Engine front end wheel train structure | |
| CN107532690A (en) | Belt transmission system | |
| US9488095B2 (en) | Power plant with pressure relief valve | |
| CN103161569A (en) | Engine accessory gear train system | |
| CN111636964B (en) | Engine and front end wheel system structure of engine | |
| CN207905932U (en) | Engine wheel system arrangement | |
| CN112412623A (en) | Accessory wheel train of BSG hybrid power engine | |
| CN208153653U (en) | A kind of long-life new type auto tensioning wheel | |
| CN203488649U (en) | Automatic tensioning wheel for engine belt | |
| EP2388496B1 (en) | Belt tensioner with high damping rubber device | |
| CN205350230U (en) | A tight pulley that rises for diesel engine transmission system | |
| CN213541205U (en) | Two-way tensioning device | |
| CN104074606A (en) | Transmission structure of engine front end wheel train | |
| CN216198475U (en) | Engine front end wheel train and manual belt tensioning device thereof | |
| CN2384026Y (en) | Bearing device for stretching wheel of automobile |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |