CN111720504A - Tensioner for conical elastic sleeve type automobile engine timing system and adjusting method - Google Patents
Tensioner for conical elastic sleeve type automobile engine timing system and adjusting method Download PDFInfo
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- CN111720504A CN111720504A CN202010729043.9A CN202010729043A CN111720504A CN 111720504 A CN111720504 A CN 111720504A CN 202010729043 A CN202010729043 A CN 202010729043A CN 111720504 A CN111720504 A CN 111720504A
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- Prior art keywords
- annular
- tensioner
- groove
- timing system
- elastic sleeve
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- 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
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- 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
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0876—Control or adjustment of actuators
- F16H2007/088—Manual adjustment
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- 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 discloses a tensioner for a conical elastic sleeve type automobile engine timing system and an adjusting method, wherein the tensioner comprises a shell (1), the rear end in the shell (1) is provided with an oil inlet hole (10), the side surface of the oil inlet hole (10) is sequentially provided with a one-way valve cover (2), a one-way valve assembly (3), a return spring (4), a throttle valve (5) and a plunger (6), the rear end of the plunger (6) is provided with an annular conical groove (8), and the annular conical groove (8) is sleeved with an elastic sleeve (7) which is matched with the annular conical groove; the inner wall of the shell (1) is provided with an annular groove (9) matched with the elastic sleeve (7), and the front end of the shell (1) is also provided with an annular limiting groove (11). The method for adjusting the rebound distance is to adjust the rebound distance by adjusting the groove width of the annular tapered groove and the width of the elastic sleeve. The invention has the characteristic of flexibly and randomly adjusting the reboundable distance.
Description
Technical Field
The invention relates to a tensioner for an automobile engine timing system, in particular to a tensioner for a conical elastic sleeve type automobile engine timing system and an adjusting method.
Background
The purpose of the timing chain tensioner is mainly to limit the vibration amplitude of the chain and to increase the meshing wrap angle between the chain and the sprocket in order to avoid the occurrence of meshing failure when the sag of the chain is too large. The tensioner has the design technical points that: when the engine is not started, the chain is kept in a tight state; when the engine works, the supporting force of the tensioner is further improved through the pressure of the lubricating system, so that the chain is still in a tight state. In addition, the tensioner plunger must still have sufficient travel when the chain is in use for a period of time for tensile elongation to occur. The tensioner can be divided into two types of non-return type and non-return type structures according to the existence of a non-return mechanism, the non-return type tensioner is used for an engine with no requirement on the rebounding distance of a plunger, the non-return type tensioner can prevent the plunger from rebounding without limitation, so that a chain and a chain wheel generate meshing jumping teeth, and the transmission noise of a timing system can be reduced. However, engines with different performances and structures have different requirements on the rebound distance of the tensioner plunger, so that tensioners with different structures need to be designed correspondingly, and common non-return tensioners such as a pawl type tensioner, a screw type tensioner, a clamping ring type tensioner and the like are required. The hydraulic tensioner has the advantages of simple structure, low cost, no non-return function, large rebound distance of the plunger piston, and suitability for engines with low requirements on performance and riding comfort; the clamping ring type tensioner is simple in structure and low in cost, the rebounding distance of the plunger can be adjusted according to the system structure during design, and the clamping ring type tensioner is suitable for an engine with VVT and high requirements on performance and riding comfort; the pawl type tensioner has a complex structure and high cost, the rebound distance of a plunger is about 3mm generally, and the pawl type tensioner is suitable for an engine with VVT and high requirements on performance and riding comfort; the spiral tensioner has a complex structure and high cost, and the rebound distance of the plunger is generally within 0.5 mm. The method is suitable for engines which have low requirements on performance and riding comfort, do not have VVT and are arranged obliquely on the whole vehicle. It can be seen that the rebound distance of each tensioner is fixed, and if the rebound distance of the tensioner needs to be adjusted, the structure of the tensioner needs to be redesigned and manufactured, so that the production cost is greatly increased. Therefore, the conventional technique has a problem that the resilient distance adjustment is troublesome.
Disclosure of Invention
The invention aims to provide a tensioner for a conical elastic sleeve type automobile engine timing system and an adjusting method. The invention has the characteristic of flexibly and randomly adjusting the reboundable distance.
The technical scheme of the invention is as follows: the tensioner for the conical elastic sleeve type automobile engine timing system comprises a shell, wherein an oil inlet hole is formed in the rear end in the shell, a one-way valve cover, a one-way valve assembly, a reset spring, a throttle valve and a plunger are sequentially arranged on the side surface of the oil inlet hole, an annular conical groove is formed in the rear end of the plunger, and a matched elastic sleeve is sleeved on the annular conical groove; the inner wall of the shell is provided with an annular groove matched with the elastic sleeve, and the front end of the shell is also provided with an annular limiting groove.
In the tensioner for the timing system of the conical elastic sleeve type automobile engine, the annular groove comprises an annular groove body, and a conical locking surface is arranged on the side surface of the annular groove body.
In the tensioner for the conical elastic sleeve type automobile engine timing system, the annular conical groove comprises an annular groove body, and a conical guide surface is arranged on the side surface of the annular groove body.
In the tensioner for the timing system of the conical elastic sleeve type automobile engine, the elastic sleeve comprises an annular sleeve body made of spring steel, a group of bending plates are arranged at the end part of the annular sleeve body, and a U-shaped groove is formed between every two adjacent bending plates; the annular sleeve body is also provided with a rolling seam.
In the tensioner for the conical elastic sleeve type automobile engine timing system, the inclination angle of the conical guide surface is set to be beta, and the conical angle of the bending plate is beta + 3-5 degrees.
In the tensioner for the conical elastic sleeve type automobile engine timing system, the groove width of the annular groove body is set to be S, the width of the annular sleeve body is set to be K, and the reboundable distance X is the difference between S and K.
In the tensioner for an automobile engine timing system of the tapered elastic sleeve type as described above, the rebound distance is in the range of 0 to 6 mm.
The rebound distance adjusting method of the tensioner for the conical elastic sleeve type automobile engine timing system realizes the adjustment of the rebound distance by adjusting the groove width of the annular conical groove and the width of the elastic sleeve.
Compared with the prior art, the plunger piston has the advantages that the annular tapered groove is formed in the front end of the plunger piston, the elastic sleeve is sleeved on the annular tapered groove, the annular groove matched with the elastic sleeve is formed in the inner wall of the shell, the plunger piston is prevented from returning by the elastic sleeve, on the premise that resilience reliability is guaranteed, the distance capable of rebounding can be freely and flexibly adjusted only by adjusting the groove width of the annular tapered groove and the width of the elastic sleeve, the structure is simple, operation and installation are convenient, and production and manufacturing costs can be effectively reduced. Meanwhile, the rebound distance can be adjusted at will, so that the tensioner can meet the requirements of different engines only by correspondingly changing the sizes of the annular tapered groove and the elastic sleeve, and the integral structure of the tensioner is not required to be changed, thereby effectively reducing the production cost and expanding the application range. Due to the wide application range, the parts can be produced in a standardized and large-scale manner, and the production cost can be further reduced. In conclusion, the invention has the characteristic of flexibly and randomly adjusting the reboundable distance.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the resilient distance;
FIG. 3 is a schematic assembly view of the present invention (maximum travel of the plunger);
FIG. 4 is a schematic view of the plunger construction;
FIG. 5 is a structural view of the width of the elastomeric sleeve;
fig. 6 is a schematic structural view of the elastic sleeve.
The labels in the figures are: 1-shell, 2-one-way valve cover, 3-one-way valve assembly, 4-reset spring, 5-throttle valve, 6-plunger, 7-elastic sleeve, 8-annular conical groove, 9-annular groove, 10-oil inlet hole, 11-annular limiting groove, 901-annular groove body, 902-conical locking surface, 801-annular groove body, 802-conical guide surface, 701-annular sleeve body, 702-bending plate, 703-U-shaped groove, 704-rolling seam, inclination angle of beta-conical guide surface, groove width of S-annular groove body, width of K-annular sleeve body and X-springback distance.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
Examples are given. The tensioner for the conical elastic sleeve type automobile engine timing system comprises a shell 1, wherein an oil inlet hole 10 is formed in the rear end of the shell 1, a one-way valve cover 2, a one-way valve assembly 3, a return spring 4, a throttle valve 5 and a plunger 6 are sequentially arranged on the side face of the oil inlet hole 10, an annular conical groove 8 is formed in the rear end of the plunger 6, and a matched elastic sleeve 7 is sleeved on the annular conical groove 8; an annular groove 9 matched with the elastic sleeve 7 is formed in the inner wall of the shell 1, and an annular limiting groove 11 is further formed in the front end of the shell 1.
The annular groove 9 comprises an annular groove body 901, and a tapered locking surface 902 is arranged on the side surface of the annular groove body 901.
The annular tapered groove 8 comprises an annular groove body 801, and a tapered guide surface 802 is arranged on the side surface of the annular groove body 801.
The elastic sleeve 7 comprises an annular sleeve body 701 made of spring steel, a group of bending plates 702 are arranged at the end part of the annular sleeve body 701, and U-shaped grooves 703 are formed between every two adjacent bending plates 702; the annular sleeve body 701 is further provided with a rolled seam 704.
The inclination angle of the conical guide surface 802 is set to be beta, and the conical angle of the bending plate 702 is beta + 3-5 degrees. Preferably β +4 °.
The conical angle of the bending plate is divided into two parts for processing and forming, the beta angle is formed by pressing when raw materials are manufactured, and the bending plate is bent by 3-5 degrees after being rolled into a sleeve.
The groove width of the annular groove body 801 is set to be S, the width of the annular sleeve body 701 is set to be K, and the reboundable distance X is the difference between S and K.
The resilient distance is typically in the range of 0-6 mm.
The rebound distance adjusting method of the tensioner for the conical elastic sleeve type automobile engine timing system realizes the adjustment of the rebound distance by adjusting the groove width of the annular conical groove and the body width of the elastic sleeve.
The one-way valve assembly comprises a shell 1 positioned outside and a one-way valve assembly 3 arranged behind an oil inlet 10 of the shell 1, wherein the one-way valve assembly 3 is connected with a return spring 4, the return spring 4 props against a throttle valve 5 and a plunger 6 to do reciprocating motion, an annular conical groove is formed in the plunger 6, an elastic sleeve 7 which is used for stopping recycling is arranged in the annular conical groove, one end of the elastic sleeve 7 is bent and expanded into a cone shape and can be matched with the annular conical groove in the plunger 6, and an annular limiting groove is also arranged at the front end of the shell 1;
the annular limiting groove at the front end of the shell 1 is used for limiting the maximum stroke of the plunger 6, and the annular limiting groove at the front end is ensured to have enough edge thickness avoiding for resisting the impact of the elastic sleeve 7, and generally the edge thickness avoiding position is larger than 1 mm.
The check valve assembly 3 can determine whether a check valve spring is needed according to the performance requirement of the engine, and if the check valve spring is arranged, the opening pressure of the check valve is within the range of 10-50 KPa.
The resilient distance of the plunger 6 can be arbitrarily set between 0 and 6 mm.
The labyrinth shape of the throttle valve 5 can adjust the flow rate of the lubricating oil, and the flow rate can be adjusted at will at 50-350 ml/min.
The tension pressure of the return spring 4 in the whole working stroke is within the range of 2-12 per mill of the tensile strength of the timing chain.
The reboundable distance can be set randomly within the range of 0-6mm by adjusting the groove width S on the plunger 6, and after the structural dimension K of the elastic sleeve 7 is determined, the reboundable distance is the difference value between S and K, and the difference value is larger than the maximum amplitude of the tensioner plunger during CAE analysis of a timing system.
The elastic sleeve 7 can be set as a standard part, spring steel 65Mn material is processed and formed through a special die, the bent part generates permanent elasticity after heat treatment, the one-way valve cover 2 and the one-way valve assembly 3 are firstly pressed into the shell 1 during assembly, the elastic sleeve 7 is pushed into an annular groove of the shell 1, finally the return spring 4, the throttle valve 5 and the plunger 6 are sequentially placed into the shell 1, the plunger 6 is slowly pressed into the assembly position with force, and the plug pin is inserted, so that the assembly is completed.
When the tensioner is installed and used, the bolt is pulled out, the plunger 6 drives the elastic sleeve 7 to move forwards under the combined action of the return spring 4 and the oil pressure until the tensioning rail is pressed, the plunger continues to move forwards after the chain is worn and extended until the elastic sleeve 7 is clamped into the annular limiting groove of the shell 1, and the plunger 6 reaches the maximum stroke.
Claims (8)
1. Toper elastic sleeve formula tensioner for automobile engine timing system, including casing (1), rear end in casing (1) is equipped with inlet port (10), and inlet port (10) side is equipped with check valve lid (2), check valve assembly (3), reset spring (4), choke valve (5) and plunger (6) in proper order, its characterized in that: the rear end of the plunger (6) is provided with an annular tapered groove (8), and the annular tapered groove (8) is sleeved with a matched elastic sleeve (7); the inner wall of the shell (1) is provided with an annular groove (9) matched with the elastic sleeve (7), and the front end of the shell (1) is also provided with an annular limiting groove (11).
2. The tensioner for a tapered elastomeric sleeve automotive engine timing system as claimed in claim 1, wherein: the annular groove (9) comprises an annular groove body (901), and a conical locking surface (902) is arranged on the side surface of the annular groove body (901).
3. The tensioner for a tapered elastomeric sleeve automotive engine timing system as claimed in claim 1, wherein: the annular tapered groove (8) comprises an annular groove body (801), and a tapered guide surface (802) is arranged on the side surface of the annular groove body (801).
4. The tensioner for a tapered elastomeric sleeve automotive engine timing system as claimed in claim 3, wherein: the elastic sleeve (7) comprises an annular sleeve body (701) made of spring steel, a group of bending plates (702) are arranged at the end part of the annular sleeve body (701), and U-shaped grooves (703) are formed between every two adjacent bending plates (702); the annular sleeve body (701) is further provided with a rolling seam (704).
5. The tensioner for a tapered elastomeric sleeve automotive engine timing system as claimed in claim 4, wherein: the inclination angle of the conical guide surface (802) is set to be beta, and the conical angle of the bending plate (702) is beta + 3-5 degrees.
6. The tensioner for a tapered elastomeric sleeve automotive engine timing system as claimed in claim 4, wherein: the groove width of the annular groove body (801) is set to be S, the width of the annular sleeve body (701) is set to be K, and the reboundable distance X is the difference value between S and K.
7. The tensioner for a tapered elastomeric sleeve automotive engine timing system as claimed in claim 6, wherein: the resilient distance is in the range of 0-6 mm.
8. A method of adjusting the reboundable distance of a tensioner for a tapered elastic tube-type automobile engine timing system as set forth in any one of claims 1 to 7, characterized in that: the adjustment of the rebound distance is realized by adjusting the groove width of the annular tapered groove and the width of the elastic sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010729043.9A CN111720504A (en) | 2020-07-27 | 2020-07-27 | Tensioner for conical elastic sleeve type automobile engine timing system and adjusting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010729043.9A CN111720504A (en) | 2020-07-27 | 2020-07-27 | Tensioner for conical elastic sleeve type automobile engine timing system and adjusting method |
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| CN111720504A true CN111720504A (en) | 2020-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010729043.9A Pending CN111720504A (en) | 2020-07-27 | 2020-07-27 | Tensioner for conical elastic sleeve type automobile engine timing system and adjusting method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112709791A (en) * | 2020-12-04 | 2021-04-27 | 浙江吉利控股集团有限公司 | Tensioner oil pressure regulating system for automobile engine and oil pressure regulating method |
-
2020
- 2020-07-27 CN CN202010729043.9A patent/CN111720504A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112709791A (en) * | 2020-12-04 | 2021-04-27 | 浙江吉利控股集团有限公司 | Tensioner oil pressure regulating system for automobile engine and oil pressure regulating method |
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