CN106089448B - Negative correction mechanism for high-pressure oil pump speed regulator of forklift diesel engine - Google Patents
Negative correction mechanism for high-pressure oil pump speed regulator of forklift diesel engine Download PDFInfo
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- CN106089448B CN106089448B CN201610678013.3A CN201610678013A CN106089448B CN 106089448 B CN106089448 B CN 106089448B CN 201610678013 A CN201610678013 A CN 201610678013A CN 106089448 B CN106089448 B CN 106089448B
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- negative
- negative correction
- spring
- pin
- bracket
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
- F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
- F02D1/04—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered by mechanical means dependent on engine speed, e.g. using centrifugal governors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/18—Control of the engine output torque
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The invention relates to a negative correction mechanism, in particular to a negative correction mechanism for a high-pressure oil pump speed regulator of a forklift diesel engine, and belongs to the technical field of high-pressure oil pumps. The speed regulator cover is connected with the speed regulation support and the negative correction support in a rotating mode through the parking shaft, the negative correction support is located on the inner side of the speed regulation support, and the negative correction support is connected with the first supporting pin in a rotating mode. The negative correction bracket is connected with a tension rod through a first positioning pin and a second positioning pin, the front end of the tension rod is connected with a negative corrector body through threads, the front end of the negative corrector body is connected with a negative adjusting screw rod through threads, a negative correction ejector rod is slidably connected in the inner cavity of the negative corrector body, the rear end of the negative correction ejector rod is provided with a negative correction spring, and the negative correction spring tightly pushes the negative correction ejector rod against the rear end of the first supporting pin. The invention can reduce the low-speed working condition torque of the engine for the forklift, reduce the exhaust temperature and reduce the acceleration smoke intensity.
Description
Technical Field
The invention relates to a negative correction mechanism, in particular to a negative correction mechanism for a high-pressure oil pump speed regulator of a forklift diesel engine, and belongs to the technical field of high-pressure oil pumps.
Background
When the forklift works, the accelerator is frequently required to be quickly increased or decreased. The existing speed regulator with a negative correction mechanism has the problem that the engine generates smoke due to interference of a pull rod stroke due to the fact that a negative correction reset spring can act in advance in the process of quickly increasing and reducing the accelerator. If a negative correction mechanism is not used, the torque of the engine cannot be reduced under the low-speed working condition, so that the exhaust temperature is over and the oil consumption is high.
Disclosure of Invention
The invention aims to overcome the defects, so that the negative correction mechanism for the high-pressure oil pump speed regulator of the forklift diesel engine is provided, the problems of black smoke emission and high oil consumption are avoided in the working process of the engine, and the emission index and the oil consumption index meet the requirements.
According to the technical scheme provided by the invention, the negative correction mechanism for the high-pressure oil pump speed regulator of the diesel engine of the forklift truck comprises a speed regulator cover, the speed regulator cover is connected with a corrector body through threads, the rear part of an inner cavity of the corrector body is connected with an adjusting screw rod through threads, the front part of the inner cavity of the corrector body is connected with a corrector ejector rod in a sliding manner, and a correction spring is arranged between the corrector ejector rod and the adjusting screw rod, and the negative correction mechanism is characterized in that: the speed regulator cover is rotatably connected with a speed regulation bracket and a negative correction bracket through a parking shaft, the negative correction bracket is positioned at the inner side of the speed regulation bracket, and the negative correction bracket is rotatably connected with a first supporting pin; the negative correction bracket is connected with a tension rod through a first positioning pin and a second positioning pin, the tension rod is in interference fit with the first positioning pin and the second positioning pin, the negative correction bracket is in clearance fit with the first positioning pin, and the negative correction bracket is in interference fit with the second positioning pin; the front end of the tension rod is connected with a negative corrector body through threads, the front end of the negative corrector body is connected with a negative adjusting screw rod through threads, a negative correcting ejector rod is connected in an inner cavity of the negative corrector body in a sliding mode, the rear end of the negative correcting ejector rod is provided with a negative correcting spring, and the negative correcting ejector rod is tightly pushed against the rear end of the first supporting pin by the negative correcting spring; the speed regulation support is connected with a second supporting pin, the second supporting pin is in interference fit with the speed regulation support, the front end of the second supporting pin is in contact with the first supporting pin, and the rear end of the second supporting pin is provided with a sliding sleeve.
Further, a bushing is arranged between the parking shaft and the speed regulation support and between the parking shaft and the negative correction support, the bushing and the speed regulation support are in interference fit, and the bushing and the negative correction support are in clearance fit.
Furthermore, two ends of the first supporting pin are in contact with the speed regulation bracket.
Furthermore, a spring cavity is arranged at the lower end of the tension rod facing one end of the speed regulation bracket, a starting spring is arranged in the spring cavity, and the front end of the starting spring contacts the speed regulation bracket.
Furthermore, a spring pin is arranged at the upper end of the tension rod, and an idle speed spring and a speed regulating spring are sleeved on the spring pin.
Compared with the prior art, the invention has the following advantages:
the invention has simple, compact and reasonable structure, convenient production, low price and cost saving; the low-speed working condition torque of the engine for the forklift can be reduced, the exhaust temperature is reduced, and the acceleration smoke intensity is reduced; the forklift can ensure that smoke is avoided due to sudden change of stroke when the engine for the forklift is used for quickly increasing or reducing the accelerator.
Drawings
FIG. 1 is a front view of the present invention.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
Description of reference numerals: 1-speed governor cover, 2-parking shaft, 3-tension rod, 4-speed governing support, 5-bush, 6-negative correction support, 7-first support pin, 8-starting spring, 9-second support pin, 10-negative correction ejector pin, 11-negative correction spring, 12-negative adjusting screw, 13-negative corrector body, 14-corrector ejector pin, 15-correction spring, 16-adjusting screw, 17-idle spring, 18-speed governing spring, 19-first positioning pin, 20-second positioning pin, 21-sliding sleeve and 22-corrector body.
Detailed Description
The invention will be further described with reference to examples in the drawings to which:
as shown in fig. 1-2, the speed regulator cover mainly comprises a speed regulator cover 1, wherein the speed regulator cover 1 is rotatably connected with a speed regulation support 4 and a negative correction support 6 through a parking shaft 2, and the negative correction support 6 is positioned on the inner side of the speed regulation support 4.
Be equipped with bush 5 between parking axle 2 and speed governing support 4, the negative correction support 6, bush 5 and speed governing support 4 are interference fit, and bush 5 and negative correction support 6 are clearance fit.
The first supporting pin 7 is connected to the negative correction support 6 in a rotating mode, two ends of the first supporting pin 7 are in contact with the speed regulation support 4, and the first supporting pin 7 is restrained by the speed regulation support 4 to be prevented from jumping out.
The negative correction bracket 6 is connected with the tension rod 3 through the first positioning pin 19 and the second positioning pin 20, the tension rod 3 is in interference fit with the first positioning pin 19 and the second positioning pin 20, the negative correction bracket 6 is in clearance fit with the first positioning pin 19, the negative correction bracket 6 is in interference fit with the second positioning pin 20, and the first positioning pin 19 can limit the rotation range of the negative correction bracket 6 around the second positioning pin 20.
The front end of the tension rod 3 is connected with a negative corrector body 13 through threads, and the front end of the negative corrector body 13 is connected with a negative adjusting screw 12 through threads. The inner cavity of the negative corrector body 13 is connected with a negative correction mandril 10 in a sliding way, the rear end of the negative correction mandril 10 is provided with a negative correction spring 11, and the negative correction spring 11 tightly pushes the negative correction mandril 10 at the rear end of the first supporting pin 7.
The speed regulation bracket 4 is connected with a second supporting pin 9, and the second supporting pin 9 is in interference fit with the speed regulation bracket 4. The front end of the second supporting pin 9 contacts the first supporting pin 7, and the rear end of the second supporting pin 9 is provided with a sliding sleeve 21, and the sliding sleeve 21.
The lower end of the tension rod 3 is provided with a spring cavity facing one end of the speed regulation bracket 4, a starting spring 8 is arranged in the spring cavity, and the front end of the starting spring 8 contacts the speed regulation bracket 4. The spring pin at the upper end of the tension rod 3 is sleeved with an idle spring 17 and a speed regulating spring 18.
The speed regulator cover 1 is connected with a corrector body 22 through threads, the rear part of the inner cavity of the corrector body 22 is connected with an adjusting screw rod 16 through threads, the front part of the inner cavity of the corrector body 22 is connected with a corrector ejector rod 14 in a sliding mode, and a correcting spring 15 is arranged between the corrector ejector rod 14 and the adjusting screw rod 16.
The working principle of the invention is as follows: when the rotating speed of the oil pump rises, the flyweight force acts on the sliding sleeve, the pretightening force of the negative correction spring is overcome, the speed regulation support and the negative correction support are pushed to rotate towards the direction of the negative correction ejector rod together around the second positioning pin until the negative correction ejector rod is contacted with the negative adjusting screw rod, the speed regulation support is connected with the pull rod, and the travel of the pull rod is reduced. When the rotating speed of the oil pump is reduced, the flyweight force is gradually smaller than the pretightening force of the negative correction spring, the speed regulation support and the negative correction support are pushed to rotate forwards around the second positioning pin, and the travel of the pull rod is increased.
Claims (5)
1. The utility model provides a burden correction mechanism for fork truck diesel engine high pressure oil pump speed regulator, includes speed regulator lid (1), goes up through threaded connection corrector body (22) on speed regulator lid (1), and threaded connection adjusting screw (16) are passed through to the inner chamber rear portion of corrector body (22), and the anterior sliding connection corrector ejector pin (14) of inner chamber of corrector body (22), is equipped with between corrector ejector pin (14) and adjusting screw (16) correction spring (15), characterized by: the speed regulator cover (1) is rotatably connected with a speed regulation bracket (4) and a negative correction bracket (6) through a parking shaft (2), the negative correction bracket (6) is positioned at the inner side of the speed regulation bracket (4), and the negative correction bracket (6) is rotatably connected with a first supporting pin (7); the negative correction bracket (6) is connected with the tension rod (3) through a first positioning pin (19) and a second positioning pin (20), the tension rod (3) is in interference fit with the first positioning pin (19) and the second positioning pin (20), the negative correction bracket (6) is in clearance fit with the first positioning pin (19), and the negative correction bracket (6) is in interference fit with the second positioning pin (20); the front end of the tension rod (3) is connected with a negative corrector body (13) through threads, the front end of the negative corrector body (13) is connected with a negative adjusting screw rod (12) through threads, a negative correction ejector rod (10) is connected in an inner cavity of the negative corrector body (13) in a sliding mode, the rear end of the negative correction ejector rod (10) is provided with a negative correction spring (11), and the negative correction ejector rod (10) is tightly propped against the rear end of the first supporting pin (7) by the negative correction spring (11); a second supporting pin (9) is connected to the speed regulation support (4), the second supporting pin (9) is in interference fit with the speed regulation support (4), the front end of the second supporting pin (9) contacts with the first supporting pin (7), and the rear end of the second supporting pin (9) is provided with a sliding sleeve (21).
2. The negative correction mechanism for the governor of high-pressure oil pump of diesel engine of forklift truck as set forth in claim 1, characterized in that: be equipped with bush (5) between parking axle (2) and speed governing support (4), burden correction support (6), bush (5) and speed governing support (4) are interference fit, and bush (5) and burden correction support (6) are clearance fit.
3. The negative correction mechanism for the governor of high-pressure oil pump of diesel engine of forklift truck as set forth in claim 1, characterized in that: and two ends of the first supporting pin (7) are in contact with the speed regulation bracket (4).
4. The negative correction mechanism for the high-pressure oil pump governor of a forklift diesel engine as set forth in claim 1, wherein: the lower end of the tension rod (3) is provided with a spring cavity facing one end of the speed regulation bracket (4), a starting spring (8) is arranged in the spring cavity, and the front end of the starting spring (8) is in contact with the speed regulation bracket (4).
5. The negative correction mechanism for the high-pressure oil pump governor of a forklift diesel engine as set forth in claim 1, wherein: and a spring pin is arranged at the upper end of the tension rod (3), and an idle speed spring (17) and a speed regulation spring (18) are sleeved on the spring pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610678013.3A CN106089448B (en) | 2016-08-16 | 2016-08-16 | Negative correction mechanism for high-pressure oil pump speed regulator of forklift diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610678013.3A CN106089448B (en) | 2016-08-16 | 2016-08-16 | Negative correction mechanism for high-pressure oil pump speed regulator of forklift diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106089448A CN106089448A (en) | 2016-11-09 |
| CN106089448B true CN106089448B (en) | 2022-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610678013.3A Active CN106089448B (en) | 2016-08-16 | 2016-08-16 | Negative correction mechanism for high-pressure oil pump speed regulator of forklift diesel engine |
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| CN (1) | CN106089448B (en) |
Citations (4)
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| DE3322929A1 (en) * | 1983-06-25 | 1985-01-10 | Robert Bosch Gmbh, 7000 Stuttgart | Speed governor for fuel injection pumps of internal combustion engines |
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| CN103925086A (en) * | 2014-03-20 | 2014-07-16 | 南京威孚金宁有限公司 | Oil pump and speed adjusting mechanism as well as positive-negative correction mechanism thereof |
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| DE2904709A1 (en) * | 1979-02-08 | 1980-08-21 | Bosch Gmbh Robert | SPEED REGULATOR FOR INJECTION INTERNAL COMBUSTION ENGINES, IN PARTICULAR CENTRIFUGAL SPEED REGULATOR OF AN INJECTION PUMP FOR VEHICLE DIESEL ENGINES |
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| CN2268126Y (en) * | 1996-06-14 | 1997-11-19 | 无锡威孚股份有限公司 | Outer correction mechanism for oil pump speed regulator of engine |
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|---|---|
| CN106089448A (en) | 2016-11-09 |
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