CN112302755A - Engine valve lift adjusting device - Google Patents
Engine valve lift adjusting device Download PDFInfo
- Publication number
- CN112302755A CN112302755A CN201910711080.4A CN201910711080A CN112302755A CN 112302755 A CN112302755 A CN 112302755A CN 201910711080 A CN201910711080 A CN 201910711080A CN 112302755 A CN112302755 A CN 112302755A
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- China
- Prior art keywords
- sleeve
- valve lift
- adjusting rod
- chuck
- engine valve
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Classifications
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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
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The invention relates to the technical field of automobiles, and discloses an engine valve lift adjusting device, which comprises: the sleeve is hollow, an installation cavity is defined in the sleeve, a first groove body communicated with the installation cavity is formed in the bottom of the sleeve, and an operation opening is formed in the side wall of the sleeve; the chuck is arranged in the mounting cavity in a sliding manner through an elastic piece; a locking member for connecting the collet and the valve stem; the adjusting rod is connected with the top of the sleeve, the top end of the adjusting rod protrudes out of the sleeve, the bottom end of the adjusting rod extends into the mounting cavity and is arranged opposite to the top surface of the chuck, and the adjusting rod can slide up and down along the sleeve; the gauge block is clamped between the adjusting rod and the chuck; and the fixing mechanism is arranged outside the sleeve and is used for being connected with the valve guide pipe. The invention has the beneficial effects that: simple structure, the regulation precision is high, and can reduce manufacturing cost by a wide margin.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to an engine valve lift adjusting device.
Background
In an engine cylinder head development test, a cylinder head air passage steady-state flow characteristic test needs to be carried out. In the test process, the valve needs to be adjusted under the lift range of 1mm-10mm, the opening degree of the valve is further adjusted, parameters such as the rotating speed and the flow of the anemoscope are measured, the flow coefficient and the tumble ratio of the cylinder cover air passage are calculated, and the control precision of the valve lift range in the test method is required to be +/-0.025 mm.
The valve lift adjusting device in the field of engine air flue tests has more forms: the common device is a servo automatic adjusting mechanism, the valve lift adjusting device uses a servo motor as a power driving source, the rotary motion of the servo motor is changed into linear motion along the direction of a valve rod through a related conversion device, the servo motor is provided with an encoder for feedback, so that higher adjusting precision can be achieved, the adjusting quantity of the valve lift is sent by an upper computer to send a control command, and an executing mechanism controls the adjusting mechanism to move a corresponding distance in the executing direction according to a given control quantity, and the valve lift adjusting device is characterized by high controlling precision and high automation degree, but has a complex structure and large occupied mounting space, and has great limitation on occasions requiring flexible arrangement; the other valve lift adjusting device is used for adjusting by using a magnetic seat support dial indicator, the adjusting mode is adjusted under the condition without a valve spring, the adjusting mode is simple in structure, but the adjusting operation is complex, and the adjusting precision and the stability are poor.
Disclosure of Invention
The invention aims to provide an engine valve lift adjusting device, which is applied to development and test of an engine cylinder cover, can simplify the structure and the adjusting mode, and can achieve the adjusting precision and the adjusting stability.
In order to achieve the above object, the present invention provides an engine valve lift adjustment device comprising:
the device comprises a sleeve, a first clamping piece and a second clamping piece, wherein a mounting cavity is defined in the sleeve, a first groove body communicated with the mounting cavity is formed in the bottom of the sleeve, and an operation opening is formed in the side wall of the sleeve;
the chuck is slidably arranged in the mounting cavity through an elastic piece, and a second groove body through which the air door rod penetrates is formed in the bottom end of the chuck;
a locking member for connecting the collet and the valve stem;
the adjusting rod is connected with the top of the sleeve, the top end of the adjusting rod protrudes out of the sleeve, the bottom end of the adjusting rod extends into the mounting cavity and is arranged opposite to the top surface of the chuck, and the adjusting rod can slide up and down along the sleeve;
a fixing mechanism mounted outside the sleeve for connection with a valve guide.
Preferably, the sleeve comprises a cylinder body and a cover plate detachably connected to the top of the cylinder body, and the adjusting rod is connected to the cover plate.
Preferably, the adjusting rod is in threaded connection with the sleeve, and a locking nut used for fastening the adjusting rod and the sleeve is sleeved outside the adjusting rod.
Preferably, the measuring device further comprises a pressure head, the pressure head is connected to the bottom end of the adjusting rod, and the measuring block is clamped between the pressure head and the chuck.
As a preferred scheme, a T-shaped groove is formed in the pressure head, and a T-shaped structure which is matched and hung with the T-shaped groove is arranged at the bottom end of the adjusting rod.
Preferably, the top of the adjusting rod is provided with a knob.
Preferably, the locking piece is a screw rod, and the engine valve lift adjusting device comprises at least two screw rods;
the bottom end of the chuck is provided with a second groove body through which the air door rod penetrates, the side wall of the chuck is provided with at least two threaded holes communicated with the second groove body, the side wall of the sleeve is provided with at least two sliding grooves corresponding to the threaded holes, one end of the screw rod is connected with the threaded holes, and the other end of the screw rod penetrates through the sliding grooves and then protrudes out of the sleeve.
Preferably, the fixing mechanism is a clamping mechanism, the clamping mechanism is mounted on the sleeve, and the clamping mechanism defines a clamping opening for clamping the valve guide.
Preferably, the clamping mechanism comprises at least two pressing sheets, the middle parts of the pressing sheets are rotatably connected to the sleeve, the top ends of the pressing sheets are connected with the sleeve through a spring, and the clamping opening is defined between the bottom ends of the pressing sheets.
Preferably, the sleeve is further provided with a positioning column which is matched and positioned with the outer surface of the valve guide pipe.
Compared with the prior art, the invention has the beneficial effects that:
according to the engine valve lift adjusting device provided by the embodiment of the invention, the collet is arranged in the sleeve in a sliding manner, the collet is connected with the sleeve through the elastic piece, the adjusting rod is rotatably arranged above the sleeve, and the measuring block with the standard thickness is clamped between the lower end part of the adjusting rod and the collet; before the test, the lift adjusting device is arranged on a valve guide pipe through a fixing mechanism, a valve rod is tightly connected with a joint, before a gauge block is clamped, the valve lift is adjusted to be zero by adjusting an adjusting rod until the adjusting rod just contacts a chuck without generating any pressure effect, then the valve lift is pressed down through an operation port, and the gauge block with required standard thickness is placed between the adjusting rod and the chuck, so that the adjustment of different lifts of the valve is realized; the valve lift can be accurately adjusted by arranging the gauge blocks with a plurality of standard thicknesses, the structure is simple, the adjusting stability is high, a servo motor is not required, and the manufacturing cost is greatly reduced.
Drawings
FIG. 1 is a schematic structural diagram of an engine valve lift adjustment apparatus according to an embodiment of the present invention;
FIG. 2 is a longitudinal cross-sectional view of FIG. 1;
FIG. 3 is a schematic cross-sectional view of an engine valve lift adjustment apparatus mounted on a valve guide in an embodiment of the present invention;
FIG. 4 is a schematic partial cross-sectional view of an engine valve lift adjustment apparatus mounted on a valve guide in an embodiment of the present invention;
FIG. 5 is another schematic partial cross-sectional view of an engine valve lift adjustment apparatus mounted on a valve guide in an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of an adjusting lever of the engine valve lift adjusting apparatus in the embodiment of the present invention;
fig. 7 is a schematic structural diagram of a ram of the engine valve lift adjustment apparatus in the embodiment of the present invention.
In the figure, 1, a sleeve; 11. a mounting cavity; 12. a first tank body; 13. an operation port; 14. a barrel; 15. a cover plate; 16. a chute; 2. a chuck; 21. a second tank body; 22. a threaded hole; 3. an elastic member; 4. adjusting a rod; 41. a T-shaped structure; 42. a knob; 5. locking the nut; 6. a pressure head; 61. a T-shaped slot; 7. a screw; 71. an operation section; 8. a clamping mechanism; 81. pressing the sheet; 82. clamping the opening; 9. a spring; 10. a positioning column; 20. a valve guide; 30. a valve stem; 40. an engine cylinder head.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, which are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
As shown in fig. 1 to 7, an engine valve lift adjusting apparatus according to a preferred embodiment of the present invention includes:
the sleeve comprises a sleeve 1 which is hollow, wherein a mounting cavity 11 is defined in the sleeve 1, a first groove body 12 communicated with the mounting cavity 11 is formed in the bottom of the sleeve 1, and an operation opening 13 is formed in the side wall of the sleeve 1;
the chuck 2 is slidably arranged in the mounting cavity 11 through an elastic piece 3;
a locking member for connecting the clip 2 and the valve stem 30;
the adjusting rod 4 is connected with the top of the sleeve 1, the top end of the adjusting rod 4 protrudes out of the sleeve 1, the bottom end of the adjusting rod 4 extends into the mounting cavity 11 and is arranged opposite to the top surface of the chuck 2, and the adjusting rod 4 can slide up and down along the sleeve 1;
the gauge block is clamped between the adjusting rod 4 and the chuck 2;
and a fixing mechanism mounted outside the sleeve 1 for connecting with the valve guide 20.
Based on the technical scheme, the specific using process is as follows:
before an engine cylinder head air passage steady-state flow characteristic test, firstly, the engine valve lift adjusting device is installed on a valve guide pipe 20 through a fixing mechanism, and after a valve rod 30 passes through a first groove body 12 of a sleeve 1, a hand can be extended into an installation cavity 11 through an operation opening 13, so that the valve rod 30 and a chuck 2 are fastened by utilizing a locking piece, and particularly, refer to fig. 3;
then, the valve rod 30 is adjusted to the zero point, and the adjusting rod 4 positioned at the upper end of the sleeve 1 is adjusted at the moment, so that the lower end surface of the adjusting rod 4 is just contacted with the upper end surface of the chuck 2 without generating any pressure effect;
finally, the gauge blocks with different standard thicknesses are placed between the lower end of the adjusting rod 4 and the upper end face of the chuck 2 from the operation port 13 according to requirements, and then the adjustment of a certain lift of the valve is completed.
By using the valve lift adjusting device provided by the embodiment of the invention, the adjusting precision of the valve lift can be ensured only by ensuring the thickness precision of the gauge block, the adjusting precision is high, and the adjustment is simple; in addition, the adjusting device is simple in structure, structures such as a servo motor are not needed, and cost can be saved.
The elastic member 3 is illustratively a compression spring.
Illustratively, the side wall of the chuck 2 is provided with an observation window for observing the position of the valve stem 30.
Illustratively, the gauge block is a ceramic gauge block of standard thickness.
Specifically, in order to facilitate the installation and the disassembly of each part, the sleeve 1 comprises a cylinder 14 and a cover plate 15 detachably connected to the top of the cylinder 14, the adjusting rod 4 is connected to the cover plate 15, and the first groove body 12 is arranged at the bottom of the cylinder 14; illustratively, the cover 15 is threadably coupled to the barrel 14.
Preferably, in this embodiment, the adjusting rod 4 is in threaded connection with the sleeve 1, and the locking nut 5 for fastening the adjusting rod 4 and the sleeve 1 is sleeved outside the adjusting rod 4, when the valve rod 30 is adjusted to the zero point, the locking nut 5 needs to be loosened first, the adjusting rod 4 is rotated to adjust the vertical sliding of the adjusting rod 4, and the locking nut 5 can be locked on the sleeve 1 after the target position is reached, so that the adjusting rod 4 is kept stationary.
In order to facilitate the disassembly, the measuring block can be guaranteed to be clamped tightly, the bottom end of the adjusting rod 4 is connected with a pressure head 6, and the measuring block is clamped between the pressure head 6 and the chuck 2.
In order to further meet the requirements of installation and disassembly, as shown in fig. 7, a T-shaped groove 61 is formed on the pressure head 6; as shown in fig. 6, the bottom end of the adjusting rod 4 is provided with a T-shaped structure 41 which is matched and hung with the T-shaped groove 61.
Preferably, in this embodiment, a knob 42 is installed on the top of the adjusting lever 4, and the adjusting lever 4 can be rotated by screwing the knob 42, so that the adjusting lever 4 moves up and down; illustratively, the knob 42 is in threaded connection with the top of the adjusting rod 4; illustratively, the knob 42 is triangular in shape, and each side is concave in a circular arc for easy manual adjustment.
In this embodiment, specifically, the locking member is a screw 7, and the engine valve lift adjusting device includes at least two screws 7;
the bottom end of the chuck 2 is provided with a second groove body 21 through which the air door rod 30 penetrates, the side wall of the chuck 2 is provided with at least two threaded holes 22 communicated with the second groove body 21, the side wall of the sleeve 1 is provided with at least two sliding grooves 16 corresponding to the threaded holes 22, one end of the screw rod 7 is connected with the threaded holes 22, and the other end of the screw rod 7 penetrates through the sliding grooves 16 and then protrudes out of the sleeve 1.
As shown in fig. 3, which is a schematic view of the engine valve lift adjusting apparatus mounted on the engine cylinder head 40, an embodiment including two screws 7 is shown, the screws 7 are first loosened, and when the top end of the valve stem 30 is inserted into the second groove 21 from the bottom of the cartridge 2, the two screws 7 are tightened to abut against the valve stem 30, so that the valve stem 30 is tightly connected to the cartridge 2, and the cartridge 2 can drive the valve stem 30 to ascend or descend.
In this embodiment, for convenience of operation, the outer end of the screw 7 is provided with an operation portion 71, and the screw 7 can be driven to drive the chuck 2 to move up and down by holding the operation portion 71; the operation portion 71 is, for example, an embossing knob with a knurled surface.
Specifically, in the present embodiment, in order to facilitate connection and detachment of the engine valve lift apparatus to and from the valve guide 20, the fixing mechanism is a clamping mechanism 8, the clamping mechanism 8 is mounted on the sleeve 1, and the clamping mechanism 8 defines a clamping opening 82 for clamping the valve guide 20.
More specifically, the clamping mechanism 8 comprises at least two pressing sheets 81, the middle parts of the pressing sheets 81 are rotatably connected to the sleeve 1, the top ends of the pressing sheets 81 are connected with the sleeve 1 through a spring 9, and the clamping opening 82 is defined between the bottom ends of the pressing sheets 81; as shown in fig. 4, which shows the clamping mechanism 8 comprising two pressing sheets 81, the two pressing sheets 81 are oppositely arranged on the side wall of the sleeve 1, when the upper end position of the pressing sheet 81 is pressed, the nip 82 is opened, and when the upper end position of the pressing sheet 81 is pressed, the nip 82 is closed due to the elastic force of the spring 9, so that the valve guide 20 is clamped in the nip.
Illustratively, the bottom end side of the pressing piece 81 is provided as an arc-shaped surface that fits with the outer wall of the valve guide 20.
Illustratively, a through hole through which the bottom end of the pressing piece 81 passes is formed in the side wall of the sleeve 1, and the bottom end of the pressing piece 81 passes through the through hole and then clamps the valve guide tube 20 inserted in the sleeve 1.
In addition, referring to fig. 5, the sleeve 1 is further provided with a positioning column 10 which is matched and positioned with the outer surface of the valve guide pipe 20, and the zero point position of the valve rod 30 can be determined according to the positioning action of the positioning column 10 and the valve guide pipe 20; illustratively, the positioning column 10 is a plunger inserted into the sidewall of the sleeve 1, one end of the plunger protrudes from the inner side surface of the sleeve 1, and an annular groove is formed on the outer sidewall of the valve guide 20, and the positioning is completed when the plunger is inserted into the annular groove.
To sum up, the embodiment of the invention provides an engine valve lift adjusting device, which is applied to development and test of an engine cylinder cover, wherein a chuck is arranged in a sleeve, the chuck is slidably arranged in the sleeve through an elastic piece, an adjusting rod is rotatably arranged above the sleeve, gauge blocks with different standard thicknesses can be clamped between the lower end part of the adjusting rod and the chuck, and the gauge blocks with different thicknesses are arranged between the adjusting rod and the chuck, so that the adjustment of different lifts of a valve is realized, the adjusting precision is high, the structure is simple, the adjusting stability is good, and the cost can be greatly reduced.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. An engine valve lift adjustment device, comprising:
the device comprises a sleeve, a first clamping piece and a second clamping piece, wherein a mounting cavity is defined in the sleeve, a first groove body communicated with the mounting cavity is formed in the bottom of the sleeve, and an operation opening is formed in the side wall of the sleeve;
the chuck is arranged in the mounting cavity in a sliding manner through an elastic piece;
a locking member for connecting the collet and the valve stem;
the adjusting rod is connected with the top of the sleeve, the top end of the adjusting rod protrudes out of the sleeve, the bottom end of the adjusting rod extends into the mounting cavity and is arranged opposite to the top surface of the chuck, and the adjusting rod can slide up and down along the sleeve;
the measuring block is clamped between the adjusting rod and the chuck;
a fixing mechanism mounted outside the sleeve for connection with a valve guide.
2. The engine valve lift adjustment apparatus of claim 1, wherein the sleeve includes a barrel and a cover plate removably attached to a top of the barrel, the adjustment lever being attached to the cover plate.
3. The engine valve lift adjustment apparatus of claim 1, wherein the adjustment rod is threadedly coupled to the sleeve, and a lock nut for fastening the adjustment rod to the sleeve is sleeved outside the adjustment rod.
4. The engine valve lift adjustment apparatus of claim 1, further comprising a ram coupled to a bottom end of the adjustment stem, the gage block sandwiched between the ram and the collet.
5. The engine valve lift adjustment device of claim 4, wherein the pressure head is provided with a T-shaped slot, and the bottom end of the adjustment rod is provided with a T-shaped structure which is matched and hung with the T-shaped slot.
6. The engine valve lift adjustment apparatus of claim 1, wherein a knob is mounted to a top of the adjustment stem.
7. The engine valve lift adjustment apparatus of claim 1, wherein said retaining member is a threaded rod, said engine valve lift adjustment apparatus including at least two of said threaded rods;
the bottom end of the chuck is provided with a second groove body through which the air door rod penetrates, the side wall of the chuck is provided with at least two threaded holes communicated with the second groove body, the side wall of the sleeve is provided with at least two sliding grooves corresponding to the threaded holes, one end of the screw rod is connected with the threaded holes, and the other end of the screw rod penetrates through the sliding grooves and then protrudes out of the sleeve.
8. The engine valve lift adjustment apparatus of claim 1, wherein the securing mechanism is a clamping mechanism mounted to the sleeve and defining a clamping opening for clamping the valve guide.
9. The engine valve lift adjustment apparatus of claim 8, wherein the clamping mechanism includes at least two pressing tabs, a middle portion of the pressing tabs being pivotally connected to the sleeve, top ends of the pressing tabs being connected to the sleeve by a spring, a bottom end of each of the pressing tabs defining the pinch.
10. Engine lift adjustment device according to claim 1, wherein the sleeve is further provided with positioning posts positioned in cooperation with an outer surface of the valve guide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910711080.4A CN112302755A (en) | 2019-08-02 | 2019-08-02 | Engine valve lift adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910711080.4A CN112302755A (en) | 2019-08-02 | 2019-08-02 | Engine valve lift adjusting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112302755A true CN112302755A (en) | 2021-02-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910711080.4A Pending CN112302755A (en) | 2019-08-02 | 2019-08-02 | Engine valve lift adjusting device |
Country Status (1)
| Country | Link |
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| CN (1) | CN112302755A (en) |
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| US20130145832A1 (en) * | 2011-12-09 | 2013-06-13 | Delphi Technologies, Inc. | Diagnostic for two-mode variable valve activation device |
| CN103452617A (en) * | 2013-09-05 | 2013-12-18 | 中国北方发动机研究所(天津) | Valve stroke adjusting device |
| CN203396579U (en) * | 2013-07-12 | 2014-01-15 | 昆明云内动力股份有限公司 | Adjusting mechanism for current stability testing air valve of engine airway |
| CN107152905A (en) * | 2016-03-04 | 2017-09-12 | 丰田自动车株式会社 | The method that lifting capacity to valve is detected |
| CN206540702U (en) * | 2017-01-05 | 2017-10-03 | 广州汽车集团股份有限公司 | Air flue test stand |
| CN207514535U (en) * | 2017-11-06 | 2018-06-19 | 钦州学院 | A kind of computer photographic device convenient for adjusting |
| CN108303260A (en) * | 2018-01-08 | 2018-07-20 | 广州汽车集团股份有限公司 | Air flue test stand |
| CN109029201A (en) * | 2018-08-22 | 2018-12-18 | 安徽江淮汽车集团股份有限公司 | Valve lift measuring device |
| CN109653830A (en) * | 2018-12-20 | 2019-04-19 | 潍柴动力股份有限公司 | A kind of variable valve lift system and engine |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201083609Y (en) * | 2007-07-30 | 2008-07-09 | 比亚迪股份有限公司 | Air valve lift measuring and adjusting apparatus |
| CN101514940A (en) * | 2008-11-28 | 2009-08-26 | 江苏大学 | Flow characteristics tester for intake and exhaust system of small gasoline engine and exhaust control method |
| CN201476965U (en) * | 2009-06-23 | 2010-05-19 | 奇瑞汽车股份有限公司 | Steady-flow trail air valve lift adjusting mechanism of engine cylinder cover air channel |
| US20130145832A1 (en) * | 2011-12-09 | 2013-06-13 | Delphi Technologies, Inc. | Diagnostic for two-mode variable valve activation device |
| CN203396579U (en) * | 2013-07-12 | 2014-01-15 | 昆明云内动力股份有限公司 | Adjusting mechanism for current stability testing air valve of engine airway |
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Application publication date: 20210202 |