WO2017059851A9 - Hydraulische spannvorrichtung für einen kettentrieb - Google Patents
Hydraulische spannvorrichtung für einen kettentrieb Download PDFInfo
- Publication number
- WO2017059851A9 WO2017059851A9 PCT/DE2016/200403 DE2016200403W WO2017059851A9 WO 2017059851 A9 WO2017059851 A9 WO 2017059851A9 DE 2016200403 W DE2016200403 W DE 2016200403W WO 2017059851 A9 WO2017059851 A9 WO 2017059851A9
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- piston
- pressure chamber
- low
- tensioning device
- hydraulic
- Prior art date
Links
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
- F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0802—Actuators for final output members
- F16H2007/0806—Compression coil springs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0802—Actuators for final output members
- F16H2007/0812—Fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
- F16H2007/0859—Check valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0863—Finally actuated members, e.g. constructional details thereof
- F16H2007/0872—Sliding members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0889—Path of movement of the finally actuated member
- F16H2007/0893—Circular path
Definitions
- the invention relates to a hydraulic tensioning device for a chain drive of an internal combustion engine.
- Chain drives generally include a drive sprocket connected to the crankshaft, connected to a camshaft
- Output sprocket connects. About the Switzerlandtrum the drive control chain, a drive torque of the crankshaft is transmitted to the camshaft.
- the timing chain is tensioned on its slack side in order to ensure its functionality over the service life. For this purpose, the timing chain is acted upon by means of a clamping device with a force.
- Such a hydraulic tensioner discloses US 2015/0 024 887 A1. Shown is a housing of a clamping device, in which a sleeve is inserted. In the sleeve, a clamping piston is guided displaceably.
- the clamping piston has a piston cavity, wherein the piston cavity together with the sleeve forms a high-pressure chamber, which is connected via a secured by a check valve inlet passage with an inlet port in connection. Between the inlet connection and the inlet passage, a low-pressure space is formed, in which a pressure regulating piston is arranged.
- the pressure regulating piston is arranged within the housing such that the axes of the pressure regulating piston and the tensioning piston are perpendicular to one another.
- the disclosed pressure control piston also shows on its outer circumferential surface a control channel enclosed by control edges, which releases or closes an inlet channel to the low pressure chamber depending on the position of the pressure regulating piston.
- the pressure control piston thus forms a part of the inflow port to the inlet passage extending hydraulic fluid path.
- a hydraulic tensioning device for a chain drive of an internal combustion engine with a tensioning piston receptacle and with a tensioning piston displaceably guided in the tensioning piston receptacle, which has a piston cavity, wherein the piston cavity together with the tensioning piston receptacle forms a high-pressure space which via a means of a Non-return valve secured inlet passage with an inlet port is connected, and with a low pressure chamber formed between inlet port and inlet passage and with a arranged in the low-pressure chamber balance piston.
- the compensating piston is arranged substantially parallel to the hydraulic medium path extending through the low-pressure space between inlet connection and inlet passage.
- the proposed hydraulic tensioner is characterized in that the balance piston directly controls the pressure in the low pressure chamber and indirectly regulates the pressure in the high pressure chamber, the pressure in the low pressure chamber being controlled passively by means of the balance piston.
- the compensating piston is arranged essentially parallel to the hydraulic path between the inlet connection and the inlet passage through the low-pressure space.
- parallel arrangement means that the compensating piston does not substantially restrict the flow of hydraulic fluid or that the compensating piston can not block the hydraulic path. If pressure peaks occur in the supply line, which pass into the low-pressure space via the inlet connection, the absorption volume in the low-pressure space can be increased by means of the compensation piston; Pressure peaks can be reduced before a transition into the high-pressure chamber.
- the balance piston can serve to push the oil in the low-pressure chamber into the high-pressure space (in this and also in other operating states, the pressure in the low-pressure chamber is greater than in the high-pressure chamber).
- the balance piston can thus support the tensioning device in the Nachsaugphase. In the low-pressure range, oil should therefore be equal piston are pressed into the high-pressure chamber.
- the oil supply should be supported even at high frequencies. The oil supply should be more uniform overall.
- the compensating piston is displaceably guided in a compensating piston receptacle, wherein the compensating piston delimits the low-pressure chamber with respect to a reference pressure chamber.
- the reference pressure chamber may preferably be in communication with the environment, for example via an opening at the reference pressure chamber.
- the compensating piston may be aligned coaxially, axially parallel or offset by an angle to the axis of the clamping piston, for example, also perpendicular to the clamping piston axis.
- the compensating piston is biased by means of a spring against the low-pressure space.
- the balance piston is arranged coaxially or axially parallel to the clamping piston.
- the bias by means of a spring is a preferred embodiment, which allows a passive control of the balance piston.
- the spring biases the compensating piston against a stop surface, wherein the stop surface at least partially surrounds the opening of the inlet passage facing the low-pressure space.
- the tensioning piston receptacle of the hydraulic tensioning device comprises a housing and a sleeve arranged in a housing bore (or in a cylindrical housing cavity), wherein the tensioning piston is displaceably guided in the sleeve.
- the embodiment allows advantages in terms of manufacturing such as the machining of surfaces adjacent to the clamping piston.
- the sleeve of the hydraulic tensioning device has a tubular portion and a bottom, wherein the inlet passage is arranged at the bottom and wherein the compensating piston receptacle is arranged on the housing; the abutment surface is arranged on the side of the bottom of the sleeve facing the low-pressure chamber.
- Housing bore can be arranged, whereby special advantages can be achieved in the production.
- the clamping piston is guided directly in a cylindrical housing cavity.
- the stop surface is arranged on the low-pressure chamber side facing a check valve, which limits the high-pressure chamber relative to the low-pressure space.
- an embodiment of the hydraulic tensioning device proves with a balance piston having a low pressure chamber facing the first portion and a low pressure chamber facing away from the second portion in the axial direction, wherein the end face of the first portion with the inlet passage at least in part surrounding abutment surface can be brought into abutment (investment area) and wherein the investment area does not completely surround the inlet passage.
- the low-pressure space in the region of the compensating piston receptacle communicates with the inlet connection via a radial feed line, wherein the radial feed line opens into the low-pressure space essentially in the region of the first section of the compensating piston and wherein the outer circumferential surface of the compensating piston is not in the first section is in contact with the inner lateral surface of the compensating piston receptacle, neither in that the first section has a smaller diameter than the second section at least in a partial area along the circumference, but at least in a partial area along the circumference of the first section, with the inside diameter of the compensating piston receptacle remaining substantially constant Circumference has a larger diameter than in an axial region of the second portion.
- the compensating piston has a recess on its end surface facing the low-pressure chamber, which is designed to be open at least at one point to the outer lateral surface of the compensating piston. In this way can be easily ensured supply of the high-pressure chamber with hydraulic fluid.
- the recess is a groove.
- the hydraulic tensioning device is preferably used in a chain drive for an internal combustion engine with a drive sprocket and with an output sprocket and with a timing chain, wherein the timing chain couples the drive sprocket and the output sprocket and wherein the timing chain by means of a voltage applied to a clamping arm hydraulic tensioning device according to one of is tensioned preceding described embodiments.
- Fig. 1 shows an embodiment of a hydraulic tensioning device in
- FIG. 2 shows another perspective of a balance piston of the embodiment shown in Fig. 1;
- Fig. 3 shows a second embodiment of a balance piston
- Fig. 4 shows a third embodiment of the hydraulic tensioner
- Fig. 5 shows the basic operation of a chain drive.
- a hydraulic tensioning device 1 in longitudinal section.
- the hydraulic tensioning device consists of a tensioning piston receptacle 2, which is composed of a housing 3 and a sleeve 4 arranged in a bore of the housing, and a tensioning piston 5.
- the tensioning piston 5 is guided axially displaceably in the tensioning piston receptacle 2 and designed with a piston cavity 6.
- the piston cavity 6 forms together with the sleeve 4 of the clamping piston receptacle 2 a high-pressure chamber 7.
- a recess is arranged at the end of the sleeve, which is opposite to the opening to the receptacle of the clamping piston 5.
- a recess is arranged at the end of the sleeve, which is opposite to the opening to the receptacle of the clamping piston 5.
- a recess is arranged at the end of the sleeve, which is opposite to the opening to the receptacle of the clamping piston 5.
- a check valve 9 is arranged, which releases the hydraulic fluid flow in the inlet direction and prevents the discharge from the high-pressure chamber 7.
- the check valve 9 um- summarizes a seat for a main spring 10, the biasing force acts on the one hand on the sleeve 4 and on the other hand on the clamping piston 5, the high-pressure chamber 7 facing away from the end of a clamping rail 29 of a chain drive (see Fig. 4).
- tensioning devices for the chain drive of an internal combustion engine are used for the purpose of tensioning the timing chain 25 and dampening vibrations occurring in the chain drive.
- the sleeve 4 and the piston cavity 6 of the clamping piston form the high-pressure chamber 7, which is filled with hydraulic fluid during operation of the chain drive.
- the hydraulic fluid is usually provided as engine oil from the general hydraulic fluid circuit.
- a low-pressure space 11 is arranged in the housing 3, which is formed between a housing-side inlet connection 12 extending radially to the clamping piston axis and the inlet passage 8.
- the low-pressure chamber 1 1 includes a compensating piston 13, which is arranged substantially parallel to the running through the low-pressure chamber 1 1 pressure medium path between the inlet port 12 and inlet passage 8.
- the compensating piston 13 is guided displaceably in a compensating piston receptacle 14 of the housing 3 and delimits the low-pressure chamber 11 against a reference pressure chamber 15.
- the reference pressure chamber communicates via a bore 16 with the environment, so that the ambient pressure serves as the reference pressure.
- the compensating piston 13 is biased by a spring 17 against a stop surface 18.
- the stop surface surrounds the low-pressure chamber 1 1 facing opening of the inlet passage 8, which is arranged at the bottom of the sleeve 4.
- the compensating piston 13 has a first and a second section in the axial direction, the first section facing the low-pressure chamber 11 and the second section facing away from the low-pressure chamber.
- the low-pressure space is in the region of the balance piston receptacle 14 via a radial supply line 19 with the inlet port 12 in connection, wherein the radial feed line 19 opens in the region of the first portion of the balance piston in the low-pressure chamber 1 1.
- the outer lateral surface of the compensating piston 13 is not in contact with the inner lateral surface of the compensating piston receptacle 14 in that the first section has a smaller diameter along the circumference than the second section.
- the compensating piston 13 also has on its the low-pressure space 1 1 facing end face a recess which is designed as a groove 20 and is designed to be open at two points to the outer circumferential surface of the balance piston 13.
- the end face of the first section can thus, as shown in FIG. 1, be brought into abutment with the stop face 18 surrounding the feed passage 8.
- the feed passage 8 is not complete; A flow of hydraulic fluid is thus made possible to reach the high-pressure space 7 via the feed passage 8, despite the compensating piston 13 in abutment.
- FIG. 2 a further perspective of the balance piston 13 is shown. Shown is a longitudinal section through the arranged on the end face of the balance piston 13 groove 20. An alternative embodiment is shown in Fig. 3. Shown is a compensating piston 13a with a diameter which remains constant over the entire length and is essentially adapted to the inner diameter of the compensating piston receptacle 14. At a location of the inner circumference of the compensating piston receptacle 14, a groove 21 is arranged, which forms a channel together with the outer circumferential surface of the balance piston 13a and thus releases a hydraulic fluid path between inlet port 12 and inlet passage 8, which extends over a recess 22 at the bottom of the sleeve 4.
- FIG. 4 shows a third embodiment of the hydraulic tensioning device 1.
- the clamping device 1 shown differs from the embodiments described above in that the clamping piston 5 is guided directly in a cylindrical housing cavity 30.
- the abutment surface 18 for the compensating piston 13 is arranged on the low pressure chamber 1 1 side facing the check valve 9, which limits the high-pressure chamber 7 relative to the low-pressure chamber 1 1.
- a chain drive for an internal combustion engine with its essential components comprises a drive sprocket 23 connected to the crankshaft, two output sprockets 24 connected to each camshaft, and a timing chain 25 connecting the drive sprocket 23 to the output sprockets 24.
- a drive torque of the crankshaft is transmitted to the camshaft.
- the timing chain is guided by a guide rail 27.
- the timing chain 25 is stretched at its return strand 28 to ensure their functionality over the operating life can.
- the timing chain 25 is acted upon by means of a clamping device 1 and a clamping arm 29 with a clamping force. Hydraulic tensioning devices according to the described embodiment moreover ensure damping of the chain drive.
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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
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020187009409A KR102617875B1 (ko) | 2015-10-06 | 2016-09-14 | 체인 구동부용 유압 인장 장치 |
US15/761,254 US10816064B2 (en) | 2015-10-06 | 2016-09-14 | Hydraulic tensioning device for a chain drive |
CN201680056699.0A CN108431455B (zh) | 2015-10-06 | 2016-09-14 | 用于链传动装置的液压的张紧设备 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015219219.9 | 2015-10-06 | ||
DE102015219219 | 2015-10-06 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2017059851A1 WO2017059851A1 (de) | 2017-04-13 |
WO2017059851A9 true WO2017059851A9 (de) | 2018-05-24 |
Family
ID=57003294
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2016/200403 WO2017059851A1 (de) | 2015-10-06 | 2016-09-14 | Hydraulische spannvorrichtung für einen kettentrieb |
Country Status (5)
Country | Link |
---|---|
US (1) | US10816064B2 (de) |
KR (1) | KR102617875B1 (de) |
CN (1) | CN108431455B (de) |
DE (1) | DE102016219280B4 (de) |
WO (1) | WO2017059851A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6795764B2 (ja) * | 2017-03-21 | 2020-12-02 | 株式会社椿本チエイン | テンショナ |
US11982352B2 (en) * | 2020-06-09 | 2024-05-14 | Ashlyn ANTONY | Apparatus for eliminating slack and vibrations in the chain of a chain drive |
CN112709791B (zh) * | 2020-12-04 | 2022-05-06 | 浙江吉利控股集团有限公司 | 用于汽车发动机的张紧器油压调节系统以及油压调节方法 |
US11828206B1 (en) * | 2022-11-14 | 2023-11-28 | Borgwarner Inc. | Hydraulic tensioner with external pin and ratchet mechanism |
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CA1258594A (en) * | 1985-03-19 | 1989-08-22 | Itsuo Iwai | Tensioner device for wrapping connector driving device in internal combustion engine |
CA1254770A (en) * | 1985-03-19 | 1989-05-30 | Yusuke Kinoshita | Tensioner device in wrapping connector driving device for internal combustion engine |
JPH0369348U (de) * | 1989-11-06 | 1991-07-10 | ||
JPH04129946U (ja) * | 1991-01-31 | 1992-11-30 | 株式会社椿本チエイン | 圧力室の空気排出機構を具えた油圧装置 |
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DE4406410A1 (de) * | 1994-02-28 | 1995-08-31 | Schaeffler Waelzlager Kg | Hydraulische Spannvorrichtung |
DE9409155U1 (de) * | 1994-06-06 | 1995-10-12 | Joh. Winklhofer & Söhne GmbH und Co KG, 81369 München | Hydraulische Spanneinrichtung |
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US5707309A (en) * | 1997-01-23 | 1998-01-13 | Borg-Warner Automotive, Inc. | Hydraulic tensioner with modular inlet check valve with pressure relief |
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DE69817344T2 (de) * | 1998-09-09 | 2004-06-09 | Morse Tec Europe S.R.L. | Triebketten- oder Riemenspanneinrichtung mit einem Kolben mit mehreren relativ zu einander bewegbaren Teilen |
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JP6310335B2 (ja) | 2014-02-21 | 2018-04-11 | 本田技研工業株式会社 | 油圧テンショナ装置 |
WO2017045681A1 (de) | 2015-09-15 | 2017-03-23 | Schaeffler Technologies AG & Co. KG | Zugmittelspanneinheit für einen zugmitteltrieb |
-
2016
- 2016-09-14 KR KR1020187009409A patent/KR102617875B1/ko active IP Right Grant
- 2016-09-14 US US15/761,254 patent/US10816064B2/en active Active
- 2016-09-14 CN CN201680056699.0A patent/CN108431455B/zh active Active
- 2016-09-14 WO PCT/DE2016/200403 patent/WO2017059851A1/de active Application Filing
- 2016-10-05 DE DE102016219280.9A patent/DE102016219280B4/de active Active
Also Published As
Publication number | Publication date |
---|---|
US10816064B2 (en) | 2020-10-27 |
WO2017059851A1 (de) | 2017-04-13 |
DE102016219280B4 (de) | 2022-11-17 |
CN108431455A (zh) | 2018-08-21 |
KR20180061212A (ko) | 2018-06-07 |
US20180259044A1 (en) | 2018-09-13 |
CN108431455B (zh) | 2021-10-12 |
DE102016219280A1 (de) | 2017-04-06 |
KR102617875B1 (ko) | 2023-12-22 |
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