Roller body assembly of fuel injection pump

Abstract

The utility model discloses a fuel injection pump roller body assembly which comprises a shell sleeve, a pin shaft is fixedly installed on the shell sleeve, and a rolling piece is connected to the pin shaft in a rotating mode. The rolling part comprises a rolling wheel, a cavity is formed in the rolling wheel, inserting openings communicated with the cavity are formed in the positions, corresponding to the pin shafts, of the front side and the rear side of the rolling wheel, a holder is welded to the interior of the cavity through a connecting rod, a through opening is formed in the holder, and a fixing shaft is welded between the front side and the rear side of the inner wall of the through opening. The fuel injection pump roller body assembly is reasonable in structural design and convenient to use, the outer surface of the inner middle roller and the inner surface of the shell sleeve as well as the inner surface of the roller and the outer surface of the pin shaft make contact with each other in a rolling connection mode during working, friction abrasion generated between the roller and the shell sleeve can be effectively reduced, damage or failure of the roller body assembly is avoided, the service life is prolonged, and the service life is prolonged. The overall structural strength is high, and the use requirements of the fuel injection pump can be comprehensively met.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel injection pumps, in particular to a fuel injection pump roller body component. Background Art

[0002] The fuel injection pump is the heart of the engine. Whether the engine can work normally depends on the working condition of the fuel injection pump. The working condition of the fuel injection pump is closely related to the plunger and the oil outlet valve, and the working condition of the roller body assembly also has a decisive influence on it. As one of the main components of the fuel injection pump, the roller body assembly has the main function of converting the rotational motion of the camshaft into the reciprocating motion of the plunger. Most of the fuel injection pump roller body assemblies in the prior art have a roller shape of a hollow cylinder, and a roller pin is arranged in the hollow part. When working, the roller rotates around the roller pin, and the inner circle of the roller and the outer circle of the roller pin are in cylindrical contact, and there is surface sliding friction between the two. Obviously, under heavy load, the inner circle of the roller and the outer circle of the roller pin are easily worn. Once the wear is serious, the roller body assembly will be damaged or fail. For this reason, we propose a fuel injection pump roller body assembly to solve the problems raised in the above background technology. Utility Model Content

[0003] The utility model aims to provide a fuel injection pump roller assembly to solve the problems raised in the above background technology.

[0004] To achieve the above object, the utility model provides the following technical solutions: a fuel injection pump roller assembly, comprising a shell, a pin is fixedly mounted on the shell, and a rolling element is rotatably connected to the pin;

[0005] The rolling element includes a roller, a cavity is formed inside the roller, through openings communicating with the cavity are formed at positions corresponding to the pin shafts on the front and rear sides of the roller, a retaining frame is welded inside the cavity through a connecting rod, a through opening is formed on the retaining frame, a fixed shaft is welded between the front and rear sides of the inner wall of the through opening, and a lubrication roller is rotatably connected to the fixed shaft.

[0006] Furthermore, the number of the connecting rods is eight and they are divided into two groups and are equidistantly mounted around the front and rear sides of the inner wall of the cavity. One end of the connecting rod away from the inner wall of the cavity is fixedly connected to the retaining frame.

[0007] Furthermore, the number of the through openings is six and they are arranged on the retaining frame at equal distances. The retaining frame adopts an annular structure and has a thickness smaller than the cross-sectional diameter of the lubrication roller.

[0008] Furthermore, a plurality of balls are arranged around the inner wall of the shell at equal distances, and the balls are movably connected to the outer surface of the rolling element.

[0009] Furthermore, a first annular groove is provided on the outer side of the roller, and the ball is rollingly connected inside the first annular groove.

[0010] Furthermore, a second annular groove is provided on the outer side of the pin shaft, and the lubrication roller is rollingly connected inside the second annular groove.

[0011] Furthermore, the inner walls of the first annular groove and the second annular groove are both provided with a wear-resistant coating.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] The utility model provides a rolling member rotatably connected to the pin shaft, and when the rolling member rotates, multiple balls on the inner wall of the shell sleeve are rollingly connected in the second annular groove opened on the outer side of the roller, effectively reducing the friction and wear between the outer side of the roller and the inner wall of the shell sleeve during rotation. At the same time, a retaining frame is fixed in the cavity inside the roller through a connecting rod, and a rotatable lubrication roller is installed in multiple through openings opened on the retaining frame. When the roller rotates, the lubrication roller is rollingly connected in the first annular groove opened on the outer side of the pin shaft, which also reduces the friction and wear between the inner side and the surface of the pin shaft, thereby greatly reducing the occurrence of jamming. The roller body assembly of the fuel injection pump has a reasonable structural design and is easy to use. During operation, the outer surface of the inner roller and the inner surface of the shell sleeve, as well as the inner surface of the roller and the outer surface of the pin shaft are all in contact with each other by rolling connection, which can effectively reduce the friction and wear generated between each other, thereby avoiding damage or failure of the roller body assembly, and extending the service life. The overall structural strength is high and can fully meet the use requirements of the fuel injection pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural cross-sectional view of the utility model;

[0015] Figure 2 It is a three-dimensional structural schematic diagram of a partial cross section of the rolling element of the utility model;

[0016] Figure 3 It is a three-dimensional structural schematic diagram of the pin shaft of the utility model.

[0017] In the figure: 1 shell, 2 pin shaft, 3 rolling element, 31 roller, 32 cavity, 33 insertion port, 34 connecting rod, 35 retaining frame, 36 through port, 37 fixed shaft, 38 lubrication roller, 39 first annular groove, 4 ball, 5 second annular groove. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-3 A fuel injection pump roller assembly includes a shell 1, a pin shaft 2 is fixedly mounted on the shell, and a rolling member 3 is rotatably connected to the pin shaft 2; the rolling member 3 includes a roller 31, a cavity 32 is formed inside the roller 31, and insertion openings 33 that are interconnected with the cavity 32 are formed at positions on both the front and rear sides of the roller 31 corresponding to the pin shaft 2, a retaining frame 35 is welded inside the cavity 32 through a connecting rod 34, a through opening 36 is formed on the retaining frame 35, a fixed shaft 37 is welded between the front and rear sides of the inner wall of the through opening 36, and a lubrication roller 38 is rotatably connected to the fixed shaft 37.

[0020] Specifically, there are eight connecting rods 34 which are divided into two groups and are equidistantly installed around the front and rear sides of the inner wall of the cavity 32 . One end of the connecting rod 34 away from the inner wall of the cavity 32 is fixedly connected to the retaining frame 35 , and the retaining frame 35 can be connected to the roller 31 through the connecting rod 34 .

[0021] Specifically, there are six through openings 36 which are equidistantly arranged around the retaining frame 35 . The retaining frame 35 has an annular structure and a thickness smaller than the cross-sectional diameter of the lubricating roller 38 .

[0022] Specifically, a plurality of balls 4 are equidistantly arranged around the inner wall of the shell 1, and the balls 4 are movably connected to the outer surface of the rolling element 3. The balls 4 effectively reduce the friction and wear between the outer side of the roller 31 and the inner wall of the shell 1 during rotation. A first annular groove 39 is provided on the outer side of the roller 31, and the balls 4 are rollingly connected inside the first annular groove 39.

[0023] Specifically, a second annular groove 5 is formed on the outer side of the pin shaft 2 , and a lubricating roller 38 is rollingly connected inside the second annular groove 5 . The lubricating roller 38 effectively reduces the friction and wear between the inner side of the roller 31 and the surface of the pin shaft 2 .

[0024] Specifically, the inner walls of the first annular groove 39 and the second annular groove 5 are both provided with a wear-resistant coating. By providing the wear-resistant coating, the friction and wear on the first annular groove 39 and the second annular groove 5 can be further reduced.

[0025] The utility model has a rolling member 3 rotatably connected to the pin shaft 2. When the rolling member 3 rotates, multiple balls 4 on the inner wall of the shell 1 are rollingly connected in the second annular groove 5 opened on the outer side of the roller 31, which effectively reduces the friction and wear between the outer side of the roller 31 and the inner wall of the shell 1 during rotation. At the same time, a retaining frame 35 is fixed in the cavity 32 inside the roller 31 through a connecting rod 34, and a rotatable lubrication roller 38 is installed in multiple openings 36 opened on the retaining frame. When the roller 31 rotates, the lubrication roller 38 is rollingly connected in the first annular groove 39 opened on the outer side of the pin shaft 2, which also reduces the friction and wear between the inner side thereof and the surface of the pin shaft 2, thereby greatly reducing the occurrence of jamming.

[0026] The fuel injection pump roller body assembly has a reasonable structural design and is easy to use. During operation, the outer surface of the inner roller 31 and the inner surface of the shell 1, as well as the inner surface of the roller 31 and the outer surface of the pin shaft 2 are in contact with each other through rolling connection, which can effectively reduce the friction and wear generated between them, thereby avoiding damage or failure of the roller body assembly and extending the service life. The overall structural strength is high and can fully meet the use requirements of the fuel injection pump.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fuel injection pump roller assembly, comprising a housing (1), characterized in that: A pin shaft (2) is fixedly mounted on the shell, and a rolling element (3) is rotatably connected to the pin shaft (2); The rolling element (3) comprises a roller (31), a cavity (32) is provided inside the roller (31), and insertion openings (33) communicating with the cavity (32) are provided at positions on both the front and rear sides of the roller (31) corresponding to the pin shaft (2), a retaining frame (35) is welded inside the cavity (32) via a connecting rod (34), a through opening (36) is provided on the retaining frame (35), a fixed shaft (37) is welded between the front and rear sides of the inner wall of the through opening (36), and a lubrication roller (38) is rotatably connected to the fixed shaft (37).

2. The fuel injection pump roller assembly according to claim 1, characterized in that: The number of the connecting rods (34) is eight and they are divided into two groups and are equidistantly mounted around the front and rear sides of the inner wall of the cavity (32); one end of the connecting rod (34) away from the inner wall of the cavity (32) is fixedly connected to the retaining frame (35).

3. The fuel injection pump roller assembly according to claim 2, characterized in that: The number of the through openings (36) is six and they are arranged on the retaining frame (35) at equal distances. The retaining frame (35) has an annular structure and a thickness smaller than the cross-sectional diameter of the lubrication roller (38).

4. The fuel injection pump roller assembly according to claim 3, characterized in that: A plurality of balls (4) are arranged around the inner wall of the shell (1) at equal distances, and the balls (4) are movably connected to the outer surface of the rolling element (3).

5. The fuel injection pump roller assembly according to claim 4, characterized in that: A first annular groove (39) is provided on the outer side of the roller (31), and the ball (4) is rollingly connected inside the first annular groove (39).

6. The fuel injection pump roller assembly according to claim 5, characterized in that: A second annular groove (5) is provided on the outer side of the pin shaft (2), and the lubrication roller (38) is rollingly connected inside the second annular groove (5).

7. The fuel injection pump roller assembly according to claim 6, characterized in that: The inner walls of the first annular groove (39) and the second annular groove (5) are both provided with a wear-resistant coating.

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