Tappet body of high-power fuel injection pump

Abstract

A tappet body of a high-power fuel injection pump comprises a tappet, a roller hole is machined in the bottom of the tappet, a roller is arranged in the roller hole, a roller shaft is arranged in the middle of the roller in a penetrating mode, bearings are installed on the two sides of the roller shaft, the roller is sleeved with the bearings, cover plates are arranged on the two sides of the roller, the roller shaft is sleeved with the cover plates, and square heads are machined at the two ends of the roller shaft. Square open holes are machined in the two sides of the idler wheel hole, the square heads are clamped into the square open holes, threaded holes are machined in the square heads and the square open holes, and the threaded holes are connected through screws, spring washers and flat washers. Compared with the prior art, the tappet body of the high-power fuel injection pump is convenient to disassemble and assemble, and the idler wheel is convenient to replace after the surface of the idler wheel is abraded.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil injection pump test technical field, specifically point to a kind of high-power oil injection pump tappet body. BACKGROUND

[0002] When oil injection pump works, cam on camshaft is contacted with roller on tappet body, and camshaft of high-power oil injection pump high-speed operation, roller on tappet body is particularly easy to wear, and "wandering car" phenomenon appears, thus new roller needs to be replaced after a period of time, and the shaft of roller middle end is interference fit with shaft hole on tappet body, to cause roller replacement difficulty. SUMMARY

[0003] The utility model provides a kind of high-power oil injection pump tappet body to solve the technical problems of the above-mentioned prior art.

[0004] To solve the above technical problems, the technical scheme adopted by the utility model is:

[0005] A kind of high-power oil injection pump tappet body, including tappet, tappet bottom is processed with roller hole, roller hole is provided with roller, roller middle is provided with roller shaft, the bearing is installed on the two sides of roller shaft, the roller is sleeved on the bearing, the two sides of roller are provided with cover plate, cover plate is sleeved on roller shaft, the two ends of roller shaft are processed with square head, the two sides of roller hole are processed with square opening, square head is inserted into square opening, the threaded hole is processed on square head and square opening, and it is connected by screw, elastic pad, flat pad at threaded hole.

[0006] Further, the periphery of the cover plate is processed with a countersunk hole, and the countersunk hole is locked with the periphery of the roller by a countersunk screw.

[0007] Further, the two sides of the cover plate are provided with flange one and flange two in the middle, the flange one presses the bearing, and the flange two is positioned with the side wall of the roller hole.

[0008] Further, the two sides of the roller shaft are processed with a step, and the step positions the bearing.

[0009] Further, the outer side of the roller shaft of the middle part of the step is processed with a tapered chamfer.

[0010] Compared with the prior art, the high-power oil injection pump tappet body of the utility model is convenient to disassemble and install, and the roller can be easily replaced after the surface of the roller is worn. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is the structure schematic view of the utility model;

[0012] Figure 2 It is the structure schematic view of the cover plate of the utility model;

[0013] Wherein, 1, tappet, 2, roller, 3, roller shaft, 4, bearing, 5, cover plate, 6, square head, 7, square hole, 8, flange one, 9, flange two, 10, conical chamfer. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the utility model will be clearly and completely described below.

[0015] As Figure 1 And Figure 2 As shown in the figure, a kind of high-power fuel injection pump tappet body, including tappet 1, tappet 1 bottom is processed with roller hole, roller hole is provided with roller 2, roller 2 middle is provided with roller shaft 3, the both sides of roller shaft 3 are equipped with bearing 4, the roller 2 is covered on bearing 4, the both sides of roller 2 are provided with cover plate 5, cover plate 5 is covered on roller shaft 3, cover plate 5 positions roller 2 and bearing 4, the both ends of roller shaft 3 are processed with square head 6, the both sides of roller hole are processed with square hole 7, square head 6 is inserted into square hole 7, square head 6 and square hole 7 are processed with through threaded hole, threaded hole is connected by screw, elastic pad, flat pad and is locked and fixed in roller hole with roller shaft 3.

[0016] In the embodiment, the both sides of roller shaft 3 are processed with step, bearing 4 is covered on the both sides of roller shaft 3 by step, the cover plate 5 is connected with roller, wherein, the periphery of cover plate 5 is processed with countersunk hole, the countersunk hole is locked by countersunk screw with the periphery thread of roller 2, the both sides of cover plate 5 middle are provided with flange one 8 and flange two 9 respectively, flange one 8 presses the inner ring of bearing 4, the flange two 6 is positioned with the plane processed on the side wall of roller hole, and the roller movement is reduced.

[0017] The gap is reserved between the roller 2 and the roller shaft 3, the lubricating oil is stored in the gap, the outer side of roller shaft in the middle part of the step of the both sides of roller shaft 3 is processed with conical chamfer 10, the conical chamfer 10 has the flow guiding effect, makes lubricating oil flow to bearing, and ensures the lubricating effect.

[0018] The utility model is not limited to the embodiment, and those skilled in the art can still make some corrections or changes without departing from the spirit of the utility model, i.e. the scope of disclosure, so the protection scope of the utility model is the range defined in the claims.

Claims

1. A high-power fuel injection pump plunger body comprising a plunger, a roller hole is formed at the bottom of the plunger, a roller is arranged in the roller hole, a roller shaft is arranged in the middle of the roller, characterized in that: The roller shaft is provided with bearings on both sides, the roller is sleeved on the bearings, cover plates are arranged on both sides of the roller, the cover plates are sleeved on the roller shaft, square heads are formed on both ends of the roller shaft, square openings are formed on both sides of the roller hole, the square heads are clamped into the square openings, threaded holes are formed on the square heads and the square openings, and the threaded holes are connected through screws, elastic washers and flat washers.

2. A high power fuel injection pump tappet body according to claim 1, characterized in that: A countersunk hole is formed on the periphery of the cover plate, and the cover plate is locked with the periphery of the roller through a countersunk screw.

3. A high power fuel injection pump plunger body according to claim 1, characterized in that: Flanges one and two are arranged on both sides of the middle of the cover plate, the flange one presses the bearing, and the flange two is positioned with the side wall of the roller hole.

4. A high power fuel injection pump plunger body according to claim 1, characterized in that: Steps are formed on both sides of the roller shaft.

5. A high power fuel injection pump tappet body according to claim 4, characterized in that: A tapered chamfer is formed on the outer side of the roller shaft of the middle part of the step.

Images