Integrated fuel injection pump gear structure

Abstract

The utility model discloses an integrated fuel injection pump gear structure which comprises a gear, a first installation portion and a second installation portion are arranged on the left end face and the right end face of the gear respectively, and the first installation portion extends towards the outer side of the gear and is provided with a plurality of driving teeth used for being connected to the power input end of an air compressor. The second installation part is provided with an installation cavity used for being connected with the power input end of the fuel injection pump, a plurality of signal teeth are arranged on the left end face of the gear, the gear, the first installation part, the driving teeth, the second installation part and the signal teeth are integrally formed, and the gear, the first installation part and the second installation part are coaxially arranged. The gear, the first mounting portion, the driving gear, the second mounting portion and the signal gear are integrally formed, assembly is facilitated, good structural strength is achieved, the air compressor is in transmission through the driving gear, the fuel injection pump is in transmission through the second mounting portion and the mounting cavity, the air compressor and the fuel injection pump can be driven at the same time, the number of parts of the whole machine is reduced, and cost is reduced. And the NVH level of the whole machine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engine parts, in particular to a structure of an integrated fuel injection pump gear. Background Art

[0002] The fuel injection pump is an important component of the engine fuel supply system. The fuel injection pump gear is a transmission component that provides input power for the fuel injection pump. The existing device for reading the gear speed is a combination of a signal disk and a signal sensor, and the signal disk is connected to the gear through a fastener. The Chinese utility model patent with the authorization announcement number CN219081701U discloses a driving gear and a signal disk assembly, including a driving gear and a signal disk. The signal disk includes a disk body with a center hole, the back of the disk body is close to the positive end face of the driving gear, and a vertically protruding driving shaft is integrally arranged at the center of the positive end face of the driving gear. The driving shaft includes a root section, a transition section and a main section connected in sequence. The outer side surface of the root section is a cylindrical surface, and the outer side surface of the transition section is a conical surface. The disk body is sleeved on the outer side of the root section and has a clearance fit. A spring plunger is fixed on the back of the disk body, and a clamping hole is opened on the driving gear. The spring plunger has an elastically connected positioning head, and the outer end of the positioning head extends out of the connecting hole and is inserted into the clamping hole. The inventor found that the disassembly method of connecting the driving gear and the signal plate requires many parts, which is time-consuming and laborious to install. Moreover, after long-term use, fasteners such as bolts and pins will inevitably loosen, posing a safety hazard. The inventor also found that when driving the air compressor in the engine air supply system, it is necessary to separately design the transmission components for driving the air compressor according to the actual situation, which is time-consuming and laborious to assemble. There is an urgent need for an integrated fuel injection pump gear structure that is easy to assemble, can drive the air compressor and the fuel injection pump at the same time, and can cooperate with the signal sensor to realize signal acquisition. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an integrated fuel injection pump gear structure which is easy to assemble, can drive an air compressor and a fuel injection pump at the same time, and can cooperate with a signal sensor to realize signal collection.

[0004] In order to solve the above technical problems, the utility model includes a gear, and the left and right end faces of the gear are respectively provided with a first mounting part and a second mounting part, the first mounting part extends to the outside of the gear, the first mounting part is provided with a plurality of driving teeth for connecting to the power input end of the air compressor, the second mounting part is provided with a mounting chamber for connecting to the power input end of the injection pump, the left end face of the gear is ringed with a plurality of signal teeth, the gear, the first mounting part, the driving teeth, the second mounting part and the signal teeth are integrally formed, and the gear, the first mounting part and the second mounting part are coaxially arranged.

[0005] The gear includes a wheel body and meshing teeth provided on the circumferential surface of the wheel body. A first sunk platform recessed into the interior of the wheel body is provided on the left end face of the wheel body, and the first mounting portion is provided on the first sunk platform.

[0006] The driving teeth are provided on the end face of the first mounting portion on the side away from the gear.

[0007] There are two driving teeth arranged at intervals, and the two driving teeth are symmetrically arranged about the axis center of the first mounting portion.

[0008] There are five signal teeth arranged at intervals on the left end face of the gear.

[0009] The outer side surface of the driving teeth is coplanar with the outer side surface of the first mounting portion, and the inner side surface of the driving teeth is coplanar with the inner side surface of the first mounting portion.

[0010] First chamfers are provided at the outer ends on both sides of the driving teeth in the circumferential direction of the first mounting portion.

[0011] A second chamfer is provided at the connection between the first mounting portion and the first sunk platform.

[0012] A second sunk platform recessed into the interior of the wheel body is provided on the right end face of the wheel body, and the second mounting portion is provided on the second sunk platform.

[0013] A flange with an outer diameter larger than that of the second mounting portion is integrally formed on one side of the second mounting portion close to the second sunk platform.

[0014] After adopting the above structure, the gear, the first mounting portion, the driving teeth, the second mounting portion and the signal teeth are integrally formed, which is not only convenient for assembly but also has good structural strength. The air compressor is driven by the driving teeth and the fuel injection pump is driven by the second mounting portion and the installation chamber, so that the air compressor and the fuel injection pump can be driven simultaneously, reducing the number of parts of the whole machine, ensuring not only the coaxiality but also improving the NVH performance of the whole machine. The signal acquisition can be realized by cooperation with the signal sensor through a plurality of signal teeth. The weight of the wheel body is reduced by the first sunk platform, achieving overall light weight. By providing the first chamfers, the driving teeth can be conveniently connected to the power input end of the air compressor in a clamping manner, improving the assembly operation efficiency. By providing the second chamfers, the first mounting portion and the first sunk platform are smoothly connected and it is convenient to machine the connection between the first mounting portion and the first sunk platform. The weight of the wheel body is reduced by the second sunk platform, achieving overall light weight. By providing the flange, the structural strength of the side of the second mounting portion close to the second sunk platform is strengthened, improving the use reliability. In summary, the utility model has the advantages of convenient use and reasonable structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the utility model;

[0016] Figure 2It is a schematic structural diagram of the semi-sectional state of the present utility model;

[0017] Figure 3 It is a schematic structural diagram of the present utility model in the usage state;

[0018] Figure 4 It is a schematic structural diagram of an air compressor, a fuel injection pump, a signal sensor, a gear chamber and a gear chamber housing;

[0019] In the figure: 1. Gear; 11. Wheel body; 111. First sunk platform; 112. Second sunk platform; 12. Meshing teeth; 2. First mounting portion; 21. Driving teeth; 211. First chamfer; 3. Second mounting portion; 31. Mounting chamber; 32. Flange; 4. Signal teeth; 5. Second chamfer; 6. Air compressor; 7. Fuel injection pump; 8. Signal sensor; 9. Gear chamber; 10. Gear chamber housing. Detailed implementation manners

[0020] Now, the present utility model will be further described in detail with reference to the accompanying drawings and embodiments. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model. For the convenience of understanding, Figure 1 The left side is the left side of the present utility model, Figure 1 The right side is the right side of the present utility model.

[0021] Refer to Figures 1 to 4, the utility model includes a gear 1. The gear 1 includes a wheel body 11 and meshing teeth 12 provided on the circumferential surface of the wheel body 11. A first sunk platform 111 recessed into the interior of the wheel body 11 is provided on the left end face of the wheel body 11, and a second sunk platform 112 recessed into the interior of the wheel body 11 is provided on the right end face of the wheel body 11. A first mounting portion 2 and a second mounting portion 3 are respectively provided on the left and right end faces of the gear 1, and the first mounting portion 2 and the second mounting portion 3 are in the shape of a hollow shaft. The first mounting portion 2 extends outward from the gear 1. Specifically, the first mounting portion 2 is provided on the first sunk platform 111, and the second mounting portion 3 is provided on the second sunk platform 112. The first mounting portion 2 is provided with a number of driving teeth 21 for connecting to the power input end of an air compressor 6. The driving teeth 21 are provided on the end face of the first mounting portion 2 away from the gear 1. Two driving teeth 21 are spaced apart, and the two driving teeth 21 are symmetrically arranged about the axis center of the first mounting portion 2. The outer side surface of the driving teeth 21 is coplanar with the outer side surface of the first mounting portion 2, and the inner side surface of the driving teeth 21 is coplanar with the inner side surface of the first mounting portion 2. The connection between the driving teeth 21 and the first mounting portion 2 adopts a non-edge design, which is convenient for processing and also ensures the structural strength. The outer side surface of the driving teeth 21 is an outer arc surface that is away from the axis of the first mounting portion 2 in the radial direction of the first mounting portion 2; the inner side surface of the driving teeth 21 is an inner arc surface that is close to the axis of the first mounting portion 2 in the radial direction of the first mounting portion 2. First chamfers 211 are provided at the outer ends on both sides of the driving teeth 21 in the circumferential direction of the first mounting portion 2. A second chamfer 5 is provided at the connection between the first mounting portion 2 and the first sunk platform 111. The second mounting portion 3 is provided with a mounting chamber 31 for connecting to the power input end of an injection pump 7. The mounting chamber 31 may be provided with a keyway, and the second mounting portion 3 can be key-connected to the power input end of the injection pump 7 through the keyway of the mounting chamber 31. A number of signal teeth 4 are provided in a ring on the left end face of the gear 1. The gear 1, the first mounting portion 2, the driving teeth 21, the second mounting portion 3 and the signal teeth 4 are integrally formed, and the gear 1, the first mounting portion 2 and the second mounting portion 3 are coaxially arranged. Five signal teeth 4 are spaced apart on the left end face of the gear 1. A flange 32 with an outer diameter larger than the outer diameter of the second mounting portion 3 is integrally formed on one side of the second mounting portion 3 close to the second sunk platform 112.

[0022] Referring to Figure 3 and Figure 4 , the injection pump 7 is installed on a gear chamber 9, the air compressor 6 is fixed to a gear chamber housing 10 through a flange, a signal sensor 8 is installed on the gear chamber housing 10, and the utility model is located inside the gear chamber 9 and the gear chamber housing 10. The power is synchronously transmitted to the power input ends of the air compressor 6 and the injection pump 7 through the utility model.

[0023] The structure of an integrated fuel injection pump gear provided by the present utility model, in which the gear 1, the first mounting portion 2, the driving tooth 21, the second mounting portion 3 and the signal tooth 4 are integrally formed, is not only convenient for assembly but also has good structural strength. The driving tooth 21 drives the air compressor 6, and the second mounting portion 3 and the mounting chamber 31 drive the fuel injection pump 7, enabling the simultaneous driving of the air compressor 6 and the fuel injection pump 7, reducing the number of parts of the whole machine, not only ensuring the coaxiality but also improving the NVH performance of the whole machine. Through a plurality of signal teeth 4, signal acquisition can be achieved in cooperation with a signal sensor 8. The weight of the wheel body 11 is reduced by the first counterbore 111, achieving overall lightweight. By providing the first chamfer 211, the driving tooth 21 can be conveniently connected to the power input end of the air compressor 6 in a snap-fit manner, improving the assembly operation efficiency. By providing the second chamfer 5, the first mounting portion 2 and the first counterbore 111 are smoothly connected and it is convenient to machine the connection between the first mounting portion 2 and the first counterbore 111. The weight of the wheel body 11 is reduced by the second counterbore 112, achieving overall lightweight. By providing the flange 32, the structural strength of the side of the second mounting portion 3 close to the second counterbore 112 is enhanced, improving the reliability in use. In summary, the present utility model has the advantages of convenient use and reasonable structure, etc.

[0024] The above content is only an example and description of the structure of the present utility model. Those skilled in the art of this technology can make various modifications or supplements to the described specific embodiments or use similar methods for substitution. As long as it does not deviate from the structure of the utility model or exceed the scope defined by the claims of this patent, it shall fall within the protection scope of the present utility model.

Claims

1. An integrated fuel injection pump gear structure, characterized by: The invention comprises a gear (1), wherein the left and right end surfaces of the gear (1) are respectively provided with a first mounting portion (2) and a second mounting portion (3), wherein the first mounting portion (2) extends outwardly from the gear (1), wherein the first mounting portion (2) is provided with a plurality of driving teeth (21) for connecting to a power input end of an air compressor (6), wherein the second mounting portion (3) is provided with a mounting chamber (31) for connecting to a power input end of an injection pump (7), wherein a plurality of signal teeth (4) are arranged around the left end surface of the gear (1), wherein the gear (1), the first mounting portion (2), the driving teeth (21), the second mounting portion (3) and the signal teeth (4) are integrally formed, and wherein the gear (1), the first mounting portion (2) and the second mounting portion (3) are coaxially arranged.

2. The structure of the integrated fuel injection pump gear according to claim 1 is characterized in that: The gear (1) comprises a wheel body (11) and meshing teeth (12) arranged on the circumferential surface of the wheel body (11); a first sinker (111) recessed into the interior of the wheel body (11) is provided on the left end surface of the wheel body (11); and the first mounting portion (2) is arranged on the first sinker (111).

3. The structure of the integrated fuel injection pump gear according to claim 1 is characterized in that: The driving tooth (21) is arranged on an end surface of the first mounting portion (2) on a side away from the gear (1).

4. The structure of the integrated fuel injection pump gear according to claim 3 is characterized in that: Two driving teeth (21) are arranged at intervals, and the two driving teeth (21) are arranged symmetrically along the axis of the first mounting portion (2).

5. The structure of the integrated fuel injection pump gear according to claim 1 is characterized in that: Five signal teeth (4) are arranged at intervals on the left end surface of the gear (1).

6. The structure of the integrated fuel injection pump gear according to claim 3 is characterized in that: The outer side surface of the driving tooth (21) is coplanar with the outer side surface of the first mounting portion (2), and the inner side surface of the driving tooth (21) is coplanar with the inner side surface of the first mounting portion (2).

7. The structure of the integrated fuel injection pump gear according to claim 6 is characterized in that: The driving teeth (21) are provided with first chamfers (211) at outer ends on both sides in the circumferential direction of the first mounting portion (2).

8. The structure of the integrated fuel injection pump gear according to claim 2 is characterized in that: A second chamfer (5) is provided at the connection between the first mounting portion (2) and the first sinking platform (111).

9. The structure of the integrated fuel injection pump gear according to claim 2 is characterized in that: The right end surface of the wheel body (11) is provided with a second sunken platform (112) recessed into the interior of the wheel body (11), and the second mounting portion (3) is arranged on the second sunken platform (112).

10. The structure of the integrated fuel injection pump gear according to claim 9 is characterized in that: A flange (32) having an outer diameter greater than that of the second mounting portion (3) is integrally formed on one side of the second mounting portion (3) close to the second sinking platform (112).

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