Oil injection assembly, engine and running equipment

Abstract

The utility model discloses an oil injection assembly, engine and driving equipment, the oil injection assembly comprises a gear transmission assembly, a gear chamber housing, a bearing and a bearing seat, the gear transmission assembly comprises an oil injection pump gear and an accessory gear meshed with the oil injection pump gear. The gear transmission assembly is mounted to the gear chamber housing. An inner ring of the bearing is fixedly connected with the periphery of the fuel injection pump gear. An inner ring of the bearing is installed on a bearing seat, and the bearing seat is in clearance fit with the gear chamber housing. According to the oil injection assembly provided by the invention, the bearing and the bearing seat are additionally arranged to support the oil injection pump gear, so that the stress of the oil injection pump gear is reduced. And the bearing seat is in clearance fit with the gear chamber housing, so that additional load caused by over-constraint to the bearing is avoided, and the service life of the oil injection assembly is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to power transmission technical field, especially relate to a kind of oil injection assembly, engine and travelling equipment. BACKGROUND

[0002] As an important component on diesel engine, fuel injection pump is regarded as the "heart" component of diesel engine. The function of fuel injection pump is to generate injection high pressure, and it determines the timing and quantity of fuel supply, which has a direct impact on the working state of diesel engine.

[0003] The driving gear of the gear transmission assembly of the oil injection assembly drives idler gear, fuel injection pump gear and accessory gear in turn. However, due to the large torque of the accessory gear, the fuel injection pump gear bears a large axial and normal force, which further shortens the service life of the oil injection assembly.

[0004] Therefore, how to prolong the service life of the oil injection assembly is a technical problem to be solved by those skilled in the art. UTILITY MODEL CONTENT

[0005] The utility model aims to provide an oil injection assembly, engine and travelling equipment to prolong the service life of the oil injection assembly.

[0006] The oil injection assembly provided by the present application comprises:

[0007] A gear transmission assembly comprising a fuel injection pump gear and an accessory gear meshing with the fuel injection pump gear;

[0008] A gear chamber cover housing, wherein the gear transmission assembly is installed in the gear chamber cover housing;

[0009] A bearing, wherein the inner ring of the bearing is fixedly connected with the outer periphery of the fuel injection pump gear;

[0010] A bearing seat, wherein the inner ring of the bearing is installed in the bearing seat, and the bearing seat is gap-fitted with the gear chamber cover housing.

[0011] Optionally, in the above-mentioned oil injection assembly, a sealing member is further included, which is located at the gap position between the bearing seat and the gear chamber cover housing, and the opposite ends of the sealing member abut against the bearing seat and the gear chamber cover housing, respectively.

[0012] Optionally, in the above-mentioned oil injection assembly, the sealing member is a sealing ring, and at least one of the bearing seat and the gear chamber cover housing is provided with a groove accommodating the sealing member.

[0013] Optionally, in the above-mentioned oil injection assembly, the bearing seat and the gear chamber cover housing are connected through threaded fasteners.

[0014] Optionally, in the fuel injection assembly, a fuel injection pump and a nut are further included, the fuel injection pump gear sleeve is arranged on the fuel injection pump, the nut is threadedly connected to the fuel injection pump, and the nut side wall is in abutment with the fuel injection pump gear to axially limit the fuel injection pump gear.

[0015] Optionally, in the fuel injection assembly, the bearing seat blocks the opening of the gear chamber cover towards the position of the fuel injection pump gear, and the bearing seat is provided with an avoiding cavity which is isolated from the fuel injection pump gear and the inner ring of the bearing.

[0016] Optionally, in the fuel injection assembly, the bearing is a cylindrical roller bearing.

[0017] Optionally, in the fuel injection assembly, the end of the bearing seat is provided with a mounting groove which is annularly structured and matched with the gear chamber cover.

[0018] An engine comprising the fuel injection assembly according to any one of the preceding fuel injection assemblies.

[0019] A traveling device comprising the fuel injection assembly according to any one of the preceding fuel injection assemblies.

[0020] In the technical scheme, the fuel injection assembly comprises a gear transmission assembly, a gear chamber cover, a bearing and a bearing seat. The gear transmission assembly comprises a fuel injection pump gear and an accessory gear meshing with the fuel injection pump gear. The gear transmission assembly is installed on the gear chamber cover. The inner ring of the bearing is fixedly connected with the outer periphery of the fuel injection pump gear. The inner ring of the bearing is installed on the bearing seat, and the bearing seat is gap-fitted with the gear chamber cover.

[0021] As known from the above description, in the fuel injection assembly provided by the application, the bearing and the bearing seat are added to support the fuel injection pump gear, so as to reduce the stress of the fuel injection pump gear. The bearing seat is gap-fitted with the gear chamber cover, so as to avoid over-constraining the bearing and bringing additional load to the bearing, and the service life of the fuel injection assembly is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on the provided drawings.

[0023] Figure 1 The layout schematic diagram of the gear transmission assembly provided by the embodiments of the present application;

[0024] Figure 2The structure schematic diagram of the oil injection assembly is provided in the embodiments of the utility model.

[0025] Wherein Figures 1-2 In: 1 - drive gear, 2 - idler, 3 - oil injection pump gear, 4 - accessory gear, 5 - oil injection pump, 6 - threaded fastener, 7 - bearing seat, 8 - sealing element, 9 - gear chamber cover, 10 - bearing, 11 - nut, 12 - avoidance cavity. DETAILED DESCRIPTION

[0026] The core of the utility model provides a kind of oil injection assembly, engine and travelling equipment, to extend the service life of oil injection assembly.

[0027] In order to make the technical personnel of the prior art better understand the technical scheme of the utility model, the utility model is further explained in detail below with the drawings and implementation.

[0028] Please refer to Figure 1 And Figure 2 .

[0029] In a specific embodiment, the oil injection assembly provided by the embodiments of the utility model includes a gear transmission assembly, a gear chamber cover 9, a bearing 10 and a bearing seat 7, the gear transmission assembly includes an oil injection pump gear 3 and an accessory gear 4 engaged with the oil injection pump gear 3, and the oil injection pump gear 3 transmits power to the accessory gear 4.

[0030] Specifically, the gear transmission assembly further includes a drive gear 1 and an idler 2. In specific work, the drive gear 1 drives the idler 2, the oil injection pump gear 3 and the accessory gear 4 in turn to rotate.

[0031] The gear transmission assembly is installed on the gear chamber cover 9, and specifically, the gear transmission assembly is located in the inner cavity of the gear chamber cover 9. The inner ring of the bearing 10 is fixedly connected with the outer periphery of the oil injection pump gear 3. The inner ring of the bearing 10 is installed on the bearing seat 7, and the bearing seat 7 is gap-fitted with the gear chamber cover 9. In use, the opening of the gear chamber cover 9 towards the position of the oil injection pump gear 3 is blocked by the bearing seat 7.

[0032] Specifically, the bearing 10 is a cylindrical roller bearing. Since the cylindrical roller bearing adopts a roller structure, it can bear higher radial and axial loads, effectively prolonging the service life of the oil injection assembly.

[0033] As can be seen from the above description, in the oil injection assembly provided by the embodiments of the present application, the bearing 10 and the bearing seat 7 are added to support the oil injection pump gear 3, thereby reducing the stress of the oil injection pump gear 3. The bearing seat 7 is gap-fitted with the gear chamber cover 9 to avoid over-constraint of the bearing 10 to bring additional load, so that the service life of the oil injection assembly provided by the present application is prolonged.

[0034] In an embodiment, the bearing seat 7 blocks the opening of the gear chamber cover 9 towards the fuel injection pump gear 3. In order to improve the sealing effect, the fuel injection assembly further comprises a sealing member 8 arranged at the gap between the bearing seat 7 and the gear chamber cover 9. Specifically, the sealing member 8 can be a silica gel member. The opposite ends of the sealing member 8 abut against the bearing seat 7 and the gear chamber cover 9, respectively. For example, the sealing member 8 can have a certain thickness of sealing pad.

[0035] Specifically, the sealing member 8 is a sealing ring. In order to improve the installation stability of the sealing ring, preferably, at least one of the bearing seat 7 and the gear chamber cover 9 is provided with a groove for accommodating the sealing member 8.

[0036] In an embodiment, the bearing seat 7 and the gear chamber cover 9 are connected by a threaded fastener 6. Specifically, the threaded fastener 6 can be a bolt. For example, during assembly, the threaded fastener 6 is screwed through the bearing seat 7 and the gear chamber cover 9.

[0037] In an embodiment, the fuel injection assembly further comprises a fuel injection pump 5 and a nut 11. The fuel injection pump gear 3 is sleeved on the fuel injection pump 5, and the nut 11 is screwed on the fuel injection pump 5 and abuts against the side wall of the nut 11 and the fuel injection pump gear 3 to axially limit the fuel injection pump gear 3. During assembly, the fuel injection pump gear 3 is installed on the fuel injection pump 5 by the nut 11. In order to facilitate the rotation of the nut 11, preferably, the outer circumferential surface of the nut 11 is provided with a flat surface facilitating the rotation of the nut 11.

[0038] In an embodiment, the inner wall of the bearing seat 7 is arranged separately from the fuel injection pump gear 3, and the bearing seat 7 is provided with an avoiding cavity 12 which is separate from the fuel injection pump gear 3 and the inner ring of the bearing 10. Specifically, the avoiding cavity 12 can be a cylindrical cavity concave on the bearing seat 7. By arranging the avoiding cavity 12, the bearing seat 7 is prevented from interfering with the work of the fuel injection pump gear 3 and the inner ring of the bearing 10.

[0039] On the basis of the above-mentioned solutions, the end of the bearing seat 7 is provided with a mounting groove in cooperation with the gear chamber cover 9, and the mounting groove has an annular structure. Specifically, the mounting groove has a first surface arranged along the axis direction of the fuel injection pump gear 3 and a second surface perpendicular to the axis direction of the fuel injection pump gear 3. The first surface and the second surface are arranged in edge connection. By arranging the annular mounting groove, the cooperation position of the bearing seat 7 and the gear chamber cover 9 forms a zigzag structure, so as to prevent foreign matters from entering the inner cavity of the fuel injection assembly through the gap position.

[0040] During assembly, the sealing member 8 can abut against the second surface. The second surface is located outside the first surface, and the second surface can be a horizontal surface.

[0041] The fuel injection assembly provided by the present application improves the reliability of the fuel injection pump 5, and does not need to rely on external equipment for installation, and the overall arrangement is convenient and flexible.

[0042] The engine provided by the application comprises the fuel injection assembly, and the fuel injection assembly is any one of the fuel injection assemblies described above. The engine is a diesel engine. The specific structure of the fuel injection assembly is described above, and the application comprises the fuel injection assembly and has the technical effects described above.

[0043] The traveling device provided by the application comprises the fuel injection assembly, and the fuel injection assembly is any one of the fuel injection assemblies described above. Specifically, the traveling device can be a vehicle. The specific structure of the fuel injection assembly is described above, and the application comprises the fuel injection assembly and has the technical effects described above.

[0044] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts of each embodiment can be referred to each other.

[0045] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fuel injection assembly, characterized by, The injection pump assembly comprises: a gear transmission assembly, which comprises an injection pump gear (3) and an accessory gear (4) engaged with the injection pump gear (3); a gear chamber cover (9), wherein the gear transmission assembly is installed in the gear chamber cover (9); a bearing (10), wherein an inner ring of the bearing (10) is fixedly connected with an outer periphery of the injection pump gear (3); a bearing seat (7), wherein the inner ring of the bearing (10) is installed in the bearing seat (7), and the bearing seat (7) is gap-fitted with the gear chamber cover (9).

2. The fuel injection assembly of claim 1, wherein, Further comprising a sealing member (8), which is located at a gap position between the bearing seat (7) and the gear chamber cover (9), and opposite ends of the sealing member (8) abut against the bearing seat (7) and the gear chamber cover (9), respectively.

3. The fuel injection assembly of claim 2, wherein, The sealing member (8) is a sealing ring, and at least one of the bearing seat (7) and the gear chamber cover (9) is provided with a groove for accommodating the sealing member (8).

4. The fuel injection assembly of claim 1, wherein, The bearing seat (7) and the gear chamber cover (9) are connected through a threaded fastener (6).

5. The fuel injection assembly of claim 1, wherein, Further comprising an injection pump (5) and a nut (11), wherein the injection pump gear (3) is sleeved on the injection pump (5), the nut (11) is threadedly connected to the injection pump (5), and a side wall of the nut (11) abuts against the injection pump gear (3) to axially limit the injection pump gear (3).

6. The fuel injection assembly of claim 1, wherein, The bearing seat (7) blocks an opening of the gear chamber cover (9) towards the position of the injection pump gear (3), and the bearing seat (7) is provided with an avoidance cavity (12) isolated from the injection pump gear (3) and the inner ring of the bearing (10).

7. The fuel injection assembly of claim 1, wherein The bearing (10) is a cylindrical roller bearing.

8. The fuel injection assembly of any one of claims 1-7, wherein, An end of the bearing seat (7) is provided with a mounting groove of an annular structure for cooperating with the gear chamber cover (9).

9. An engine characterized by, The injection pump assembly comprises the injection pump assembly according to any one of claims 1-8.

10. A traveling apparatus characterized by comprising: The injection pump assembly comprises the injection pump assembly according to any one of claims 1-8.

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