CN115143002B - Roller tappet of electric control unit pump - Google Patents
Roller tappet of electric control unit pump Download PDFInfo
- Publication number
- CN115143002B CN115143002B CN202210722982.XA CN202210722982A CN115143002B CN 115143002 B CN115143002 B CN 115143002B CN 202210722982 A CN202210722982 A CN 202210722982A CN 115143002 B CN115143002 B CN 115143002B
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- Prior art keywords
- roller
- tappet
- tappet body
- pin
- pump
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- 238000005461 lubrication Methods 0.000 claims abstract description 20
- 230000002093 peripheral effect Effects 0.000 claims abstract description 19
- 229910000906 Bronze Inorganic materials 0.000 claims abstract description 5
- 229910052790 beryllium Inorganic materials 0.000 claims abstract description 5
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000010974 bronze Substances 0.000 claims abstract description 5
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000003921 oil Substances 0.000 claims description 32
- 239000010687 lubricating oil Substances 0.000 claims description 12
- 238000012423 maintenance Methods 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005299 abrasion Methods 0.000 description 12
- 239000000446 fuel Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000007906 compression Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
- F02M59/102—Mechanical drive, e.g. tappets or cams
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/445—Selection of particular materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/48—Assembling; Disassembling; Replacing
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The utility model relates to an electric control unit pump roller tappet, and belongs to the technical field of high-pressure oil supply of diesel engines. The electric control unit pump roller tappet comprises a tappet body, wherein the tappet body is a cylindrical part, a roller is arranged below the tappet body, the tappet body is connected with the roller through a roller pin shaft, and clearance fit is formed between the roller and the roller pin. The roller pin material adopts beryllium bronze QBE2.0 (hard state), and has the advantages of high strength, elasticity, wear resistance, fatigue resistance and the like, so that the roller pin material can effectively realize self lubrication through clearance fit between the roller pin and a roller. The rigidity of the roller pin is prevented from being damaged by arranging an oil duct on the roller pin. The peripheral surface of the roller is set to be arc-shaped, and the peripheral amplitude setting range is set according to practical conditions, so that the edge effect and the contact stress are reduced. And the peripheral surface of the roller is provided with micro grains which can further strengthen the lubrication between the roller and the cam.
Description
Technical Field
The utility model relates to an electric control unit pump roller tappet, and belongs to the technical field of high-pressure oil supply of diesel engines.
Background
The electronic control unit pump is a second generation time control fuel pump, and the main moving parts are a plunger, a tappet body and a roller, wherein the tappet comprises two parts, namely the tappet body and the roller, which are connected through a roller pin. The tappet is integrally assembled with the plunger, plunger spring, and spring seat 14 of the unit pump, as shown in fig. 11. The tappet 15 is installed between the driving cam 16 and the plunger, plunger spring and spring seat 14, converts the rotational motion of the driving cam 16 into linear reciprocating motion, and simultaneously pushes the tappet 15 to perform linear reciprocating motion in the adapter (pump seat).
The tappet rod moves up and down, so that the plunger piston is pushed to move, fuel oil is pressurized, and the control of the electromagnetic valve is matched with the ECU to obtain higher fuel oil pressure. Due to the higher power, fuel economy and emissions levels of modern diesel engines, fuel injection pressure levels are further required to be increased, which requires the plunger to provide greater thrust, while also increasing the roller and cam loads, and the friction load between the tappet body and the pump seat.
Therefore, in order to ensure the normal operation of the moving parts, good lubrication is required, if the design structure, the selected materials and the lubrication mode are unreasonable, the cams and the rollers are quickly worn and ablated, and the two friction pairs formed by the tappet body, the pump seat, the roller pin and the rollers are also worn and increased, so that the performance of the host is reduced, and even serious faults occur. Therefore, the tappet structure is designed, the stress distribution condition of the roller is improved under the condition of ensuring lubrication, the service life is prolonged, and the overall performance is ensured; and the semi-penetrating straight notch on the surface of the supporting body at one end of the roller pin is arranged, so that the disassembly and maintenance are facilitated.
In the prior art, the technical field of tappet design is commonly used for improving lubrication conditions by arranging oil channels, for example, in a lubrication mechanism (patent number: CN 200720081058.9) of a tappet body for an oil injection pump, the lubrication mechanism utilizes a technology that the oil channels which are directly led to roller pins are symmetrically arranged from the inner side of the tappet body, and the oil channels which are led to the inner side of a roller are symmetrically arranged on the roller pins to realize forced lubrication of a lubrication oil film between the roller pins and the roller.
The circumferential anti-rotation and positioning measures of the tappet body are related. Most references are made to the guiding means, but in order to guarantee the basic guiding function of the tappet body, its circumferential positioning must be taken into account. In the prior art related to this aspect, the utility model patent (patent number CN 201020524710.1) discloses a technical solution, the tappet body component of the utility model is applied to an injection pump mechanism of a fuel engine, the tappet body component is installed in a closed cylinder, the tappet body component moves up and down to and fro along with the rotation of a cam, and a guide groove arranged on the outer wall of the tappet body is matched with a guide pin in the closed cylinder, so that the axial rotation of the tappet body component is limited.
The above patent of the utility model can show that in the prior art, from the angle of oil duct establishment, oil film forced lubrication is formed between the roller pin and the roller so as to improve lubrication condition and reduce abrasion of the roller and the roller pin, but obviously the following problems exist:
1. the setting of the oil duct has great influence on the rigidity of the cylindrical pin and the supporting body, and under the high-load working condition, great stress concentration can be formed near the hollowed-out oil duct, so that the requirement on the material performance is improved, and the cost is increased. The vertical blind hole lubrication oil ducts on the two sides of the roller pin are always at the bearing position, so that the rigidity of the roller pin is greatly damaged.
2. The diameters of the oil duct and the oil inlet are difficult to determine. If the diameter of the oil duct is reduced to reduce the rigidity influence on the tappet body and the roller pin, the oil inlet is not required to be opened too large, so that the aperture of the oil inlet is smaller, the entering lubricating oil quantity is smaller, and the lubricating effect is influenced.
3. The circumferential positioning implementation mode of most of the prior art has larger defects, and the guide groove part used for limiting the axial rotation of the tappet body is difficult to separate from the guide pin piece in the closed cylinder when being disassembled, so that the difficulty of maintenance and inspection is increased.
Disclosure of Invention
The technical solution of the utility model is as follows: overcomes the defects of the prior art and provides an electric control unit pump roller tappet.
The technical scheme of the utility model is as follows:
the utility model provides an automatically controlled monoblock pump gyro wheel tappet, this automatically controlled monoblock pump gyro wheel tappet includes the tappet body, and the tappet body is cylindrical part, sets up the gyro wheel in the below of tappet body, and the tappet body passes through gyro wheel round pin hub connection with the gyro wheel, is clearance fit between gyro wheel and the gyro wheel round pin.
The tappet body main body is cylindrical, the side wall of the cylindrical part is a cylindrical section, the top end of the tappet body is provided with an inclined surface section, and a through hole matched with the roller pin is arranged above the inclined surface section; a lug is arranged above a through hole matched with the roller pin, a roller mounting groove is arranged in the inclined plane section, and the size of the roller mounting groove is matched with that of the roller; one end of the tappet body is provided with a lubricating oil storage groove, the tappet body is provided with an oil hole which is used for communicating the lubricating oil storage groove with the roller mounting groove and is used for guiding the oil entering the lubricating oil storage groove from the guiding groove to the roller in time so as to strengthen the lubrication with the cam; the side wall of the tappet body is provided with a guide groove, the length direction of the guide groove is parallel to the axis of the tappet body, and the guide groove is a long through groove with one U-shaped end and the other end penetrating through the cylindrical surface section; the distance between the lowest end of the guide groove and the bottom end of the tappet body is a complete section; the tappet body is provided with a roller mounting hole, and the roller pin is in interference fit with the roller mounting hole.
The peripheral surface of the roller is arc-shaped, and the bulge amplitude is within the range of 2e-4 to 6e-4 compared with the width of the roller.
The width of the roller is 20mm, and the waist lifting amplitude is set to be 0.004 mm-0.012 mm.
The inner circumferential surface and the outer circumferential surface of the roller are provided with fine grains, the grains are mutually staggered, and the micro oil storage grid is formed by adopting texture arrangement.
The shape of the miniature oil storage grid is parallelogram or triangle.
The length ratio of the outer diameter of the set cylindrical section and the tappet body is length-diameter ratio M, the length of the complete section and the length of the cylindrical section are length-diameter ratio N, the values of the two parameters are in the range that the length-diameter ratio is 1.5 or more and M or more and 1 or more, and the length-diameter ratio of the complete section is 0.2 or more.
The roller pin is made of hard beryllium bronze.
When the column surface section is processed, the bulge which is invisible to the naked eye is reserved.
Compared with the prior art, the utility model has the following beneficial effects:
(1) The roller pin material adopts beryllium bronze QBE2.0 (hard state), and has the advantages of high strength, elasticity, wear resistance, fatigue resistance and the like, so that the roller pin material can effectively realize self lubrication through clearance fit between the roller pin and a roller. The rigidity of the roller pin is prevented from being damaged by arranging an oil duct on the roller pin.
(2) The peripheral surface of the roller is set to be arc-shaped, and the peripheral amplitude setting range is set according to practical conditions, so that the edge effect and the contact stress are reduced. And the peripheral surface of the roller is provided with micro grains which can further strengthen the lubrication between the roller and the cam.
(3) The through hole guide groove with one through end is adopted, so that the single pump and the tappet body can be taken out without disassembling the pump seat, and the maintenance and replacement difficulty is further reduced.
(4) The abrasion between the tappet body and the pump seat is improved in structural aspect, the longer the cylindrical surface section is, the larger the whole mass is, and the risk that the tappet body interferes with compression of the plunger spring is increased when the cylindrical surface section is too short. The length ratio of the cylindrical surface section to the outer diameter of the tappet body is set to be 1.5-1. This problem can be effectively solved.
(5) The abrasion between the tappet body and the pump seat is improved from the structural aspect, and the length of the non-penetrated side complete section of the through hole guide groove is set to be N which is more than or equal to 0.2 than the cylindrical section. Ensuring the rigidity of the complete section.
(6) The abrasion between the tappet body and the pump seat is improved from the structural aspect, the cylindrical surface section is bulged in a tiny invisible manner, the contact stress between the tappet body and the pump seat is improved, and the abrasion to the pump seat at the pressed position is particularly reduced.
(7) The abrasion between the tappet body and the pump seat is improved in structural aspect, and the rigidity of the roller pin is prevented from being damaged by arranging an oil duct on the roller pin. Edge effects and contact stress are reduced. The difficulty of maintenance and replacement is reduced. The abrasion between the tappet body and the pump seat is improved from the structural aspect.
Drawings
FIG. 1 is a schematic diagram of the installation of the structure of the present utility model on an electronically controlled unit pump;
FIG. 2 is a schematic illustration of a tappet structure according to the present utility model;
fig. 3 is a front view of the tappet structure of the present utility model;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;
FIG. 5 is a schematic view of the texture and drum-shaped structure of the inner and outer peripheral surfaces of the roller;
FIG. 6 is a schematic diagram of contact stress distribution;
FIG. 7 is a schematic illustration of a tappet body structure;
FIG. 8 is a schematic view of the cross-sectional structure taken in the X-X direction of FIG. 7;
FIG. 9 is a schematic illustration of tappet body force oscillation;
FIG. 10 is a schematic view of a cylindrical segment of a tappet body
FIG. 11 is a prior art tappet position diagram;
the device comprises a 1-tappet body, a 2-roller pin, a 3-roller, a 4-roller mounting groove, a 5-lug, a 6-roller mounting hole, a 7-lubricating oil storage groove, an 8-oil hole, a 9-guiding groove, a 10-inclined plane section, an 11-cylindrical section, a 12-complete section, a 13-adapter, a 14-plunger, a plunger spring and a spring seat, a 15-tappet, a 16-driving cam, a 17-miniature oil storage grid, a 18-compression position, a 19-tappet body swinging direction, a 20-pump seat, a 21-cam rotating direction, a 22-roller stress direction, a 23-pump seat guiding pin and a 24-cylindrical section bulge amplitude.
Detailed Description
The utility model is further illustrated and described below with reference to the drawings and detailed description.
The utility model provides a tappet structure suitable for an electric control unit pump, as shown in figure 1, a plunger spring and a spring seat of the electric control unit pump are in clearance fit with the inner diameter of a tappet body, and the bottom surface of the spring seat is contacted with the bottom surface of a guide section of the tappet body. The tappet roller converts the rotation motion of the driving cam into linear reciprocating motion, and simultaneously pushes the tappet to perform linear reciprocating motion in the adapter body. The tappet drives the plunger to move, pressurizes fuel, and cooperates with the ECU to control the electromagnetic valve to obtain higher fuel pressure.
As shown in fig. 2-4, the tappet body 1 can be divided into a conical surface section 10 and a cylindrical surface section 11 from the appearance, the inclined surface section and the cylindrical surface section are provided with roller mounting grooves 4, two left and right opposite lugs 5 are arranged on two sides of each roller mounting groove, two concentric roller mounting holes 6 perpendicular to the axis of the tappet body are arranged on the two opposite lugs, and the length of each roller pin 2 is equal to the length of each roller mounting groove 4 plus the thickness of the two lugs 5. The roller 3 is arranged in the roller mounting groove 4 by utilizing the roller pin 2; the two ends of the roller pin 2 are arranged in the roller mounting holes 6 at the two sides of the tappet body 1, and the roller pin 2 is in interference fit with the roller mounting holes 6; the roller 3 is arranged on the roller pin 2, and the roller 3 is in clearance fit with the roller pin 2.
The roller pin 2 is made of hard beryllium bronze (QBe 2), and has the advantages of high strength, elasticity, wear resistance, fatigue resistance and the like, and the roller pin and the roller can be effectively self-lubricated through clearance fit.
The outer peripheral surface of the roller 3 is arc-shaped, the waist-raising width is set to be 0.004 mm-0.012 mm under the condition that the roller width is 20mm (namely, the raising width is set to be 2e compared with the roller width) -4 To 6e -4 In) the roller is arranged as shown in fig. 6, (1) the outer peripheral surface of the roller is slightly linear, and (2) the outer peripheral surface of the roller is arc-shaped, so that the influence of edge effect can be effectively reduced by arranging the outer peripheral surface of the roller to be arc-shaped relative to the linear shape, namely, the edge stress is reduced, meanwhile, the contact stress with a cam is obviously reduced, and the service lives of the roller 3 and the cam are prolonged.
In addition, the inner peripheral surface and the outer peripheral surface of the roller are provided with fine grains, which are staggered, namely, the texture arrangement is adopted, and a miniature oil storage grid shown in fig. 5 is formed between the intersecting grains, so that the lubrication between the roller 3 and the cam and the lubrication between the roller 3 and the roller pin 2 are further enhanced. The shape of the miniature oil storage grid can be various shapes such as parallelogram, triangle and the like. The intersection angle of lines is determined by parameters such as the outer diameter and the width of the roller, and the depth and the density of the lines are not too large, so that the rigidity is not excessively influenced.
The tappet body structure is described in detail below, and the schematic diagrams are shown in fig. 7-8, a guiding groove 9 is formed on the outer wall of the tappet body 1, the length direction of the guiding groove 9 is parallel to the axis of the tappet body 1, the guiding groove 9 is a through slot with one end being U-shaped and the other end penetrating through the cylindrical section 11, a lubricating oil storage groove 7 is formed at one end of the tappet body 1, an oil hole 8 for communicating the lubricating oil storage groove 7 with the roller mounting groove 4 is formed on the tappet body 1, and the lubricating oil entering the lubricating oil storage groove 7 from the guiding groove 9 is used for guiding the roller in time so as to enhance the lubrication with the cam.
In addition, as shown in fig. 9 to 10, when the tappet works normally, the guide groove 9 cooperates with the pump seat guide pin 23 fixedly connected with the pump seat to realize the function of limiting the tappet body to rotate around the axial direction, and due to the through hole guide groove structure penetrated at one side, the single pump and the tappet can be directly taken out without disassembling the pump seat during maintenance or replacement. However, since the tappet body and the pump seat are in clearance fit, the direction of the cam shaft borne by the roller is not vertical upwards, the tappet body swings when working due to the horizontal component of the force, the upper end complete section of the guide groove and the lower side of the cylindrical surface end of the tappet body on one side of the oil duct are extruded with the pump seat (the pressed position is shown in fig. 10), the longer the cylindrical surface section 11 is, the larger the whole mass is, the larger the inertia is, the whole working performance is influenced, the shorter the cylindrical surface section 11 is, the tilting is easier, the risk that the tappet body interferes with compression of the plunger spring is increased, and therefore the structural size of the tappet body is limited. Therefore, in fig. 9, the length ratio of the cylindrical surface section 11 to the outer diameter of the tappet body 1 is set to be the length-diameter ratio M, the length ratio of the complete section 12 on the non-penetrating side of the guide groove 9 to the cylindrical surface section 11 is set to be the complete section ratio N, and when the length-diameter ratio 1.5 is greater than or equal to M is greater than or equal to 1, the complete section ratio N is greater than or equal to 0.2, the crushing failure or the abrasion failure at the pressed position can be effectively prevented.
Since the wear resistance of the tappet body material is better than that of the pump seat material, the abrasion of the pump seat is always larger than that of the tappet, so that in order to reduce the abrasion of the tappet body to the pump seat, especially the abrasion of the pressed position to the pump seat, the cylindrical surface is not completely processed, namely, the cylindrical surface section is analogous to the bulge amplitude of the outer circumferential surface of the roller 2, the cylindrical surface section is not set with cylindricity tolerance, but bulge invisible to the tiny naked eyes (so that the cylindrical surface section is still called as the cylindrical surface section) is adopted, as shown in fig. 10, thereby improving the contact stress between the tappet body and the pump seat, and especially reducing the abrasion of the pressed position (as shown in fig. 9) to the pump seat.
Claims (7)
1. An automatically controlled monoblock pump gyro wheel tappet, its characterized in that: the roller tappet of the electric control unit pump comprises a tappet body (1), a roller pin (2) and a roller (3);
the main body of the tappet body (1) is a hollow cylinder, the roller (3) is connected to the top end of the tappet body (1) through a roller pin (2) shaft, and the roller (3) is in clearance fit with the roller pin (2);
the roller (3)The outer peripheral surface is circular arc, the ratio of the bulge amplitude to the width of the roller (3) is 2e -4 -6e -4 ：1；
One end of the tappet body (1) is provided with a lubricating oil storage groove (7), the tappet body (1) is provided with an oil hole (8) which is used for communicating the lubricating oil storage groove (7) with the roller mounting groove (4) and is used for guiding the oil entering the lubricating oil storage groove (7) from the guide groove (9) to the roller in time so as to strengthen the lubrication with the cam; a guide groove (9) is formed in the side wall of the tappet body (1), the length direction of the guide groove (9) is parallel to the axis of the tappet body (1), and the guide groove (9) is a long through slot with one U-shaped end and the other end penetrating through the cylindrical surface section (11); the distance between the lowest end of the guide groove (9) and the bottom end of the tappet body (1) is a complete section (12); the tappet body (1) is provided with a roller mounting hole (6), and the roller pin (2) is in interference fit with the roller mounting hole (6);
when the tappet works, the guide groove (9) is matched with the guide pin of the pump seat to limit the tappet body to rotate around the axial direction, the guide groove (9) is of a through opening guide groove structure with one side penetrating, and the single pump and the tappet are directly taken out without disassembling the pump seat during maintenance or replacement;
the side wall surface of the main body part of the tappet body (1) is a cylindrical surface section (11), the top end of the main body part is provided with an inclined surface section (10), and a through hole matched with the roller pin (2) is arranged above the inclined surface section (10); and a lug (5) is arranged above a through hole matched with the roller pin (2), a roller mounting groove (4) is arranged in the inclined surface section (10), and the size of the roller mounting groove (4) is matched with the size of the roller (3).
2. An electrically controlled unit pump roller tappet as set forth in claim 1, wherein:
when the cylindrical section (11) of the tappet body (1) is processed, the outer peripheral surface has a bulge, and the ratio of the bulge amplitude to the length of the cylindrical section (11) is 2e -4 -6e -4 :1, the ratio of the bulge width of the outer peripheral surface of the roller (3) to the width of the roller (3) is b, and a=b.
3. An electrically controlled unit pump roller tappet as set forth in claim 1, wherein:
the width of the roller (3) is 20-22mm, and the waist lifting amplitude is 0.004mm-0.012 mm.
4. An electrically controlled unit pump roller tappet as set forth in claim 1, wherein:
the inner peripheral surface and the outer peripheral surface of the roller (3) are provided with grains, the grains are mutually staggered, and the miniature oil storage grid is formed by adopting texture arrangement.
5. An electrically controlled monoblock pump roller tappet as set forth in claim 4, wherein:
the shape of the miniature oil storage grid is parallelogram or triangle.
6. An electrically controlled unit pump roller tappet as set forth in claim 1, wherein:
the ratio of the length of the cylindrical surface section (11) to the outer diameter of the tappet body (1) is set to be M, and M is more than or equal to 1.5 and more than or equal to 1;
the length ratio of the whole section (12) to the cylindrical section (11) is N, and N is more than or equal to 0.2.
7. An electrically controlled unit pump roller tappet as set forth in claim 1, wherein:
the roller pin (2) is made of hard beryllium bronze.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210722982.XA CN115143002B (en) | 2022-06-24 | 2022-06-24 | Roller tappet of electric control unit pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210722982.XA CN115143002B (en) | 2022-06-24 | 2022-06-24 | Roller tappet of electric control unit pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115143002A CN115143002A (en) | 2022-10-04 |
| CN115143002B true CN115143002B (en) | 2023-10-27 |
Family
ID=83407521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210722982.XA Active CN115143002B (en) | 2022-06-24 | 2022-06-24 | Roller tappet of electric control unit pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115143002B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2735313A (en) * | 1956-02-21 | Dickson | ||
| JP2003049745A (en) * | 2001-05-29 | 2003-02-21 | Denso Corp | Fuel injection pump |
| CN101479466A (en) * | 2006-06-30 | 2009-07-08 | 卡特彼勒公司 | Tappet assembly |
| CN201763492U (en) * | 2010-09-10 | 2011-03-16 | 无锡锡州机械有限公司 | Tappet body component with lubrication structure |
| CN102506000A (en) * | 2011-12-31 | 2012-06-20 | 中国兵器工业集团第七○研究所 | Pressure lubricating integral barrel-shaped tappet device |
| CN106471222A (en) * | 2014-06-20 | 2017-03-01 | 欧德克斯有限公司 | Roller tappet |
| DE102018204505A1 (en) * | 2018-03-23 | 2019-09-26 | Robert Bosch Gmbh | Roller tappets, in particular for a pump and pump with roller tappet |
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2022
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| US2735313A (en) * | 1956-02-21 | Dickson | ||
| JP2003049745A (en) * | 2001-05-29 | 2003-02-21 | Denso Corp | Fuel injection pump |
| CN101479466A (en) * | 2006-06-30 | 2009-07-08 | 卡特彼勒公司 | Tappet assembly |
| CN201763492U (en) * | 2010-09-10 | 2011-03-16 | 无锡锡州机械有限公司 | Tappet body component with lubrication structure |
| CN102506000A (en) * | 2011-12-31 | 2012-06-20 | 中国兵器工业集团第七○研究所 | Pressure lubricating integral barrel-shaped tappet device |
| CN106471222A (en) * | 2014-06-20 | 2017-03-01 | 欧德克斯有限公司 | Roller tappet |
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| CN115143002A (en) | 2022-10-04 |
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