CN115143002A - Automatically controlled monoblock pump gyro wheel tappet - Google Patents
Automatically controlled monoblock pump gyro wheel tappet Download PDFInfo
- Publication number
- CN115143002A CN115143002A CN202210722982.XA CN202210722982A CN115143002A CN 115143002 A CN115143002 A CN 115143002A CN 202210722982 A CN202210722982 A CN 202210722982A CN 115143002 A CN115143002 A CN 115143002A
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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 16
- 230000002093 peripheral effect Effects 0.000 claims abstract description 16
- 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 29
- 239000010687 lubricating oil Substances 0.000 claims description 15
- 238000012423 maintenance Methods 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000446 fuel Substances 0.000 description 7
- 238000005299 abrasion Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Images
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 invention relates to an electric control monoblock pump roller tappet, and belongs to the technical field of high-pressure oil supply of diesel engines. The roller tappet of the electric control monoblock pump 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 the roller is in clearance fit with the roller pin. The roller pin is made of beryllium bronze QBe2.0 (hard state) and has the advantages of high strength, elasticity, wear resistance, fatigue resistance and the like, so that self-lubrication can be effectively realized through clearance fit between the roller pin and the roller. The rigidity of the roller pin is prevented from being damaged due to the arrangement of an oil passage on the roller pin. The peripheral surface of the roller is set to be arc-shaped, the peripheral amplitude setting range is set by combining with actual conditions, and the edge effect and the contact stress are reduced. And the micro grains are arranged on the peripheral surface of the roller, so that the lubrication between the roller and the cam can be further enhanced.
Description
Technical Field
The invention relates to an electric control monoblock pump roller tappet, and belongs to the technical field of high-pressure oil supply of diesel engines.
Background
The electric control monoblock 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 specific positions of the tappet are shown in fig. 11, and the plunger, the plunger spring and the spring seat 14 of the single pump are assembled into a whole. The tappet 15 is installed between the drive cam 16 and the plunger, the plunger spring and the spring seat 14, converts the rotational motion of the drive cam 16 into the linear reciprocating motion, and pushes the tappet 15 to perform the linear reciprocating motion in the adapter (pump seat).
The tappet moves up and down to push the plunger to move, so that fuel is pressurized, and high fuel pressure is obtained by matching with the control of the ECU on the electromagnetic valve. Due to the requirements of higher dynamic property, fuel economy and emission indexes of modern novel diesel engines, the fuel injection pressure level needs to be further improved, so that the plunger is required to provide higher thrust, and meanwhile, the loads of the roller and the cam and the friction load between the tappet body and the pump seat are increased.
Therefore, in order to ensure the normal work of the moving part, good lubrication needs to be provided, if the design structure, the selected materials and the lubrication mode are unreasonable, the cam and the roller can be worn and ablated quickly, and two pairs of friction pairs consisting of the tappet body and the pump seat, and the roller pin and the roller can also be worn and accelerated, so that the performance of the main machine is reduced, and even major faults occur. Therefore, the invention aims to design a tappet structure, improve the stress distribution condition of the roller under the condition of ensuring lubrication, prolong the service life and ensure the overall performance; and through arranging the semi-through straight notch positioned on the surface of the support body at one end of the roller pin, the disassembly and the maintenance are facilitated.
In the tappet design technology field, the lubrication condition is improved by arranging an oil channel, for example, in a lubricating mechanism (patent number: CN 200720081058.9) of a tappet body for an oil injection pump, the lubricating mechanism realizes the forced lubrication of a lubricating oil film between a roller pin and a roller by symmetrically arranging a lubricating oil channel directly leading to the roller pin from the inner side of the tappet body and symmetrically arranging a lubricating oil channel leading to the inner side of the roller on the roller pin.
The anti-rotation and positioning measures of the tappet body in the circumferential direction are related. Most of the guiding means are mentioned, but in order to guarantee the basic guiding function of the tappet body, the circumferential positioning thereof must be taken into consideration. In the prior art scheme that relates to this aspect, utility model patent (patent number CN 201020524710.1) discloses a technical scheme, this utility model tappet body part be applied to in the fuel oil engine oil injection pump mechanism, tappet body part dress is in closed cylinder, tappet body part is along with the rotation of cam makes the reciprocating motion that goes up and down, the guide groove that sets up on tappet body outer wall cooperatees with the guide pin spare in the closed cylinder, has restricted tappet body part's axial rotation.
The utility model discloses a can see out prior art and establish the angle from the oil duct more, form oil film force-feed lubrication between gyro wheel round pin and gyro wheel to seek to improve the lubricated condition, reduce the wearing and tearing of gyro wheel and gyro wheel round pin, nevertheless obviously have following problem:
1. the oil passage 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 oil passage, so that the requirement on the material performance is improved, and the cost is increased. The lubricating oil passages of the blind holes vertical to the two sides of the roller pin are always positioned at the pressure bearing position, and the rigidity damage to the roller pin is large.
2. The diameters of the oil passage and the oil inlet are difficult to determine. If the diameter of the oil duct is reduced to reduce the influence on the rigidity of the tappet body and the roller pin, the oil inlet hole is not required to be too large, so that the aperture of the oil inlet hole is smaller, the amount of the entering lubricating oil is less, and the lubricating effect is influenced.
3. The circumferential positioning implementation mode of most of the prior art has great defects, and a guide groove part for limiting axial rotation of the tappet body is difficult to separate from a guide pin piece in a closed cylinder during disassembly, so that the difficulty of maintenance and inspection is increased.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, and the roller tappet of the electric control unit pump is provided.
The technical solution of the invention is as follows:
the utility model provides an automatically controlled monoblock pump roller tappet, this automatically controlled monoblock pump roller tappet includes the tappet body, and the tappet body is cylindrical part, sets up the gyro wheel in the below of the tappet body, and the tappet body passes through the gyro wheel pin hub connection with the gyro wheel, is clearance fit between gyro wheel and the gyro wheel pin.
The tappet 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 section, and a through hole matched with the roller pin is arranged above the inclined section; a lug is arranged above the 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, and the tappet body is provided with an oil hole which communicates the lubricating oil storage groove with the roller mounting groove and is used for guiding oil entering the lubricating oil storage groove from the guide groove to the roller in time so as to enhance the lubrication with the cam; a guide groove is formed in the side wall of the tappet body, the length direction of the guide groove is parallel to the axis of the tappet body, and the guide groove is a through hole long groove with one end being U-shaped and the other end penetrating through the cylindrical surface section; the distance from the lowest end of the guide groove to 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 setting range of the bulging amplitude to the width of the roller is 2e-4 to 6 e-4.
The width of the roller is 20mm, and the waist-raising amplitude is set to be 0.004 mm-0.012 mm.
The inner and outer circumferential surfaces of the roller are provided with fine grains which are mutually staggered, and the micro oil storage grid is formed by adopting texture arrangement.
The shape of the micro oil storage grid is parallelogram or triangle.
The length ratio of the cylindrical section to the outer diameter of the tappet body is set to be a length-diameter ratio M, the length ratio of the complete section to the cylindrical section is set to be a complete section ratio N, the value ranges of the two parameters are that the length-diameter ratio is more than or equal to 1.5 and more than or equal to 1, and the complete section ratio N is more than or equal to 0.2.
The roller pin is made of hard beryllium bronze.
When the cylindrical surface section is processed, tiny bulges which are invisible to naked eyes are remained.
Compared with the prior art, the invention has the following beneficial effects:
(1) The roller pin is made of beryllium bronze QBe2.0 (hard state) and has the advantages of high strength, elasticity, wear resistance, fatigue resistance and the like, so that self-lubrication can be effectively realized through clearance fit between the roller pin and the roller. The rigidity of the roller pin is prevented from being damaged due to the arrangement of an oil passage on the roller pin.
(2) The peripheral surface of the roller is set to be arc-shaped, the peripheral amplitude setting range is set by combining with actual conditions, and the edge effect and the contact stress are reduced. And the micro grains are arranged on the peripheral surface of the roller, so that the lubrication between the roller and the cam can be further enhanced.
(3) Adopt the opening guide way that one end link up can take out monoblock pump and tappet body under the condition of not dismantling the pump seat, further reduced the degree of difficulty of maintenance and change.
(4) Improve the wearing and tearing between tappet body and pump seat from the aspect of the structure, the cylinder section is longer, and whole quality is bigger, and the cylinder section is short excessively, then increases the tappet body and interferes the risk of plunger spring compression. The length ratio of the cylindrical surface section to the outer diameter of the tappet body is set to be that the length-diameter ratio is more than or equal to 1.5 and more than or equal to M and more than or equal to 1. This problem can be effectively solved.
(5) The abrasion between the tappet body and the pump base is improved from the aspect of structure, the length of the whole section of the non-penetrating side of the through opening guide groove is set to be N, and N is more than or equal to 0.2. Ensuring the rigidity of the complete section.
(6) The abrasion between the tappet body and the pump seat is improved from the aspect of structure, the cylindrical surface section adopts tiny bulge which is invisible to naked eyes, the contact stress between the tappet body and the pump seat is improved, and the abrasion on the pump seat at a pressed position is particularly reduced.
(7) The abrasion between the tappet body and the pump base is improved from the aspect of structure, and the rigidity of the roller pin is prevented from being damaged due to the arrangement of an oil passage on the roller pin. The edge effect and the 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 aspect of structure.
Drawings
FIG. 1 is a schematic view of the mounting of the structure of the present invention on an electronically controlled monoblock pump;
FIG. 2 is a schematic illustration of a tappet configuration of the present invention;
FIG. 3 is a front view of the tappet structure of the present invention;
FIG. 4 isbase:Sub>A sectional view taken along line A-A of FIG. 3;
FIG. 5 is a schematic view of the inner and outer peripheral surface textures and drum structures of the roller;
FIG. 6 is a schematic view of contact stress distribution;
FIG. 7 is a schematic view of a tappet body structure;
FIG. 8 is a schematic cross-sectional view taken along the line X-X in FIG. 7;
FIG. 9 is a schematic view of a tappet body swinging under force;
FIG. 10 is a schematic view of a cylindrical surface section of a tappet body
FIG. 11 is a schematic illustration of a prior art tappet position;
the oil-gas pump comprises a tappet body 1, a roller pin 2, a roller 3, a roller mounting groove 4, a lug 5, a roller mounting hole 6, a lubricating oil storage groove 7, an oil hole 8, a guide groove 9, a slope section 10, a cylindrical section 11, a complete section 12, an adapter 13, a plunger 14, a plunger spring and a spring seat 15, a tappet rod 16, a driving cam 17, a micro oil storage grid 18, a pressure position 18, a tappet body swing direction 19, a pump seat 20, a cam rotating direction 21, a roller force direction 22, a pump seat guide pin 23 and a cylindrical section bulge amplitude 24.
Detailed Description
The invention will be further elucidated and described with reference to the drawings and the detailed description.
The invention provides a tappet structure suitable for an electric control monoblock pump, as shown in figure 1, a plunger spring and a spring seat of the electric control monoblock 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 rotary motion of the driving cam into linear reciprocating motion, and meanwhile pushes the tappet to perform linear reciprocating motion in the adapter body. The tappet rod pushes the plunger piston to move, fuel is pressurized, and high fuel pressure is obtained by matching with the control of the ECU on the electromagnetic valve.
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, roller installation grooves 4 are arranged on the inclined surface section and the cylindrical surface section, two left and right opposite lugs 5 are arranged on two sides of the roller installation grooves, two concentric roller installation holes 6 perpendicular to the tappet body on the axis are arranged on the tappet body, and the length of the roller pin 2 is equal to the length of the roller installation grooves 4 plus the thickness of the two lugs 5. The roller 3 is arranged in a roller mounting groove 4 by using a roller pin 2; two ends of the roller pin 2 are arranged in roller mounting holes 6 on 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), the material has the advantages of high strength, elasticity, wear resistance, fatigue resistance and the like, and self-lubrication can be effectively realized through clearance fit between the roller pin and the roller.
The outer peripheral surface of the roller 3 is arc-shaped, and the waist rise amplitude is set to be 0.004 mm-0.012 mm (namely, the rise amplitude is set to be 2e larger than the roller width under the condition that the roller width is 20mm -4 To 6e -4 The reason for such arrangement is shown in fig. 6, (1) the outer peripheral surface of the roller is in a micro-linear shape, and (2) the outer peripheral surface of the roller is in an arc shape, so that the influence of the edge effect can be effectively reduced by arranging the outer peripheral surface of the roller into the arc shape relative to the linear shape, namely, the edge stress is reduced, meanwhile, the contact stress with the cam is obviously reduced, and the service lives of the roller 3 and the cam are prolonged.
In addition, the inner and outer peripheral surfaces of the roller are provided with fine lines in a staggered shape, namely, the arrangement of the texture is adopted, and a micro oil storage grid as shown in figure 5 is formed between the crossed lines, 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 micro oil storage grid can be a plurality of shapes such as a parallelogram, a triangle and the like. The intersecting angle of the lines is determined by the parameters of the outer diameter, the width and the like of the roller, and the depth and the density of the lines are not too large so as to avoid too large influence on the rigidity.
The structure of the tappet body will be described in detail below, and the schematic diagram is shown in fig. 7-8, a guide groove 9 is formed in the outer wall of the tappet body 1, the length direction of the guide groove 9 is parallel to the axis of the tappet body 1, the guide groove 9 is a through hole long groove with one end being a U shape and the other end penetrating through the cylindrical surface section 11, a lubricating oil storage groove 7 is formed in one end of the tappet body 1, and an oil hole 8 communicating the lubricating oil storage groove 7 with the roller mounting groove 4 is formed in the tappet body 1, and is used for guiding oil entering the lubricating oil storage groove 7 from the guide groove 9 to the roller in time to enhance the lubrication with the cam.
In addition, as shown in fig. 9-10, when the tappet normally works, the guide groove 9 cooperates with the pump base guide pin 23 fixedly connected with the pump base to realize the function of limiting the axial rotation of the tappet body, and due to the structure of the through opening guide groove penetrating through one side, the single pump and the tappet can be directly taken out without disassembling the pump base during maintenance or replacement. But because the tappet body is clearance fit with the pump mount, the direction of the camshaft that the gyro wheel receives is not vertical upwards, the horizontal component of power has led to the tappet body can take place the swing at the during operation, the complete section in upper end of guide groove extrudees (pressurized position is shown in figure 10) with the pump mount mutually with the tappet body column face end downside of oil duct one side, and cylinder section 11 is longer, the whole quality can lead to inertia big more greatly more, influence holistic working property, cylinder section 11 is short excessively, then tip over more easily, the risk that the plunger spring compression is interfered to the tappet body in the increase, consequently, need restrict the structure size of the tappet body. Therefore, in the graph 9, the length ratio of the cylindrical section 11 to the outer diameter of the tappet body 1 is set as the length-diameter ratio M, the length ratio of the complete section 12 on the side, where the guide groove 9 does not penetrate, to the cylindrical section 11 is set as the complete section ratio N, and when the length-diameter ratio 1.5 is not less than M and not less than 1 and the complete section ratio N is not less than 0.2, crushing failure or abrasion failure at the pressed position can be effectively prevented.
Because the wear resistance of the tappet body material is superior to that of the pump seat material, and the wear of the pump seat is often greater than that of the tappet, in order to reduce the wear of the tappet body to the pump seat, especially the wear of the pump seat at the position of a pressed position, when the cylindrical surface section 11 is processed, the tappet body is not completely processed into a cylindrical surface, namely, the cylindrical surface section is not subjected to cylindricity tolerance setting, but is subjected to tiny bulge invisible to naked eyes (so the bulge is still called as the cylindrical surface section) instead, as shown in fig. 10, so that the contact stress between the tappet body and the pump seat is improved, and the wear of the pump seat at the position of the pressed position (as shown in fig. 9) is especially reduced.
Claims (10)
1. The utility model provides an automatically controlled monoblock pump gyro wheel tappet which characterized in that: the roller tappet of the electric control monoblock 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) in a shaft mode, and the roller (3) is in clearance fit with the roller pin (2);
the peripheral surface of the roller (3) is in the shape of an arc, and the ratio of the bulging amplitude to the width of the roller (3) is 2e -4 -6e -4 ：1。
2. An electrically controlled monoblock pump roller tappet according to claim 1, wherein:
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); a lug (5) is arranged above the through hole matched with the roller pin (2), a roller mounting groove (4) is arranged in the inclined plane section (10), and the size of the roller mounting groove (4) is matched with that of the roller (3).
3. An electrically controlled monoblock pump roller tappet according to claim 1, wherein:
when the cylindrical surface section (11) of the tappet body (1) is machined, the outer peripheral surface is bulged, and the ratio of the bulging amplitude to the length of the cylindrical surface section (11) is 2e -4 -6e -4 : and 1, setting the ratio as a, and setting the ratio of the bulge amplitude of the outer peripheral surface of the roller (3) to the width of the roller (3) as b, wherein a = b.
4. An electrically controlled unit pump roller tappet according to any one of claims 1 to 3, wherein:
a lubricating oil storage groove (7) is formed in 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 in the tappet body (1), and oil entering the lubricating oil storage groove (7) from the guide groove (9) is guided to the roller in time to enhance the lubrication of 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 through hole long groove with one end being U-shaped and the other end penetrating through the cylindrical surface section (11); the distance from the lowest end of the guide groove (9) to 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).
5. An electrically controlled monoblock pump roller tappet according to claim 4, wherein:
the tappet during operation, guide groove (9) and pump mount uide pin cooperation restriction tappet body are rotatory around the axial to guide groove (9) are the opening guide way structure that one side runs through, directly take out monoblock pump and tappet and need not to dismantle the pump mount when maintenance or change.
6. An electrically controlled monoblock pump roller tappet according to claim 4, wherein:
the width of the roller (3) is 20-22mm, and the waist-rising amplitude is 0.004-0.012 mm.
7. An electrically controlled unit pump roller tappet according to claim 1 or 5, wherein:
the inner and outer circumferential surfaces of the roller (3) are provided with grains which are mutually staggered and arranged in a texture manner to form a micro oil storage grid.
8. An electronically controlled monoblock pump roller lifter according to claim 7, wherein:
the shape of the micro oil storage grid is parallelogram or triangle.
9. An electrically controlled monoblock pump roller tappet according to claim 1, wherein:
the ratio of the length of the set cylindrical surface section (11) to the outer diameter of the tappet body (1) is M, and M is more than or equal to 1.5 and is more than or equal to 1;
the length ratio of the complete section (12) to the cylindrical section (11) is N, and N is more than or equal to 0.2.
10. An electrically controlled monoblock pump roller tappet according to 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 true CN115143002A (en) | 2022-10-04 |
| CN115143002B CN115143002B (en) | 2023-10-27 |
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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 |
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| 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 |
| US20080006233A1 (en) * | 2006-06-30 | 2008-01-10 | Bartley Bradley E | 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 |
| US20080006233A1 (en) * | 2006-06-30 | 2008-01-10 | Bartley Bradley E | Tappet assembly |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115143002B (en) | 2023-10-27 |
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