High-pressure common rail pump transmission structure of V-shaped engine
By adopting a dual bearing structure and lubrication system in the V-type engine, the problems of insufficient load and difficulty of disassembly and assembly of high-pressure common rail pumps under high-speed and heavy-load conditions are solved, and higher load-bearing capacity and lower manufacturing costs are achieved , and extends bearing life.
Patent Information
- Application Number
- CN202420911308.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-04-29
AI Technical Summary
The transmission structure of the medium and high pressure common rail pump of the V-type engine is insufficient in high-speed and heavy-load conditions, is inconvenient to disassemble and assemble, and is high in manufacturing costs. The single bearing structure cannot meet the higher radial force requirements.
A dual bearing structure consisting of idler assembly and common rail pump spline seat assembly is meshed with the common rail pump spline seat gear through idler gear, combining bearing spacer and lubricating oil system to improve load bearing capacity and simplify the disassembly and assembly process.
It realizes high load capacity and disassembly and assembly convenience under high-speed and heavy-load conditions, reduces manufacturing costs, and extends bearing life through lubrication system, improves operation stability and sealing.
Smart Images
Figure CN222141413U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engines, in particular to a high-pressure common rail pump transmission structure of a V-type engine. Background Art
[0002] In a V-type engine, the high-pressure common rail pump is not only the "heart" of the engine, but also the power that provides the fuel supply system for the engine. The high-pressure common rail pump is the interface between the high-pressure oil circuit and the low-pressure oil circuit. Its function is to generate fuel pressure in the common rail pipe by controlling the fuel output. It is responsible for providing sufficient high-pressure fuel to the common rail pipe under all working conditions, increasing the fuel pressure, and achieving atomization effect through high-pressure injection. It is installed on the gear chamber body and driven by the gear system. To ensure the reliability, sealing and stability of the high-pressure common rail pump. At present, the transmission structure of the high-pressure common rail pump of the V-type engine is generally a single-bearing structure, and the transmission shaft, gear, and bearing structure are often connected by bolts to the body. The disadvantage of this structure is that it is inconvenient to disassemble and assemble, which will lead to high manufacturing costs; under high-speed and heavy-load conditions, the bearing cannot withstand higher load capacity and greater radial force. Summary of the invention
[0003] In order to solve the above technical problems, the utility model provides a high-pressure common rail pump transmission structure of a V-type engine, which can adapt to high-speed and heavy-load working conditions, is easy to disassemble and assemble, and reduces manufacturing costs.
[0004] The technical scheme is as follows: a high-pressure common rail pump transmission structure of a V-type engine, comprising a high-pressure common rail pump and a gear chamber body, characterized in that an idler assembly and a common rail pump spline seat assembly are installed in the gear chamber body, an idler installation port is opened on one side of the gear chamber body at the idler assembly and an idler cover plate is installed, a common rail pump installation port is opened on the other side of the gear chamber body at the common rail pump spline seat assembly, the idler assembly comprises an idler shaft, an idler bearing and an idler gear, one end of the idler shaft is clamped on the common rail pump installation port The inner wall of the gear chamber body on the installation port side is fixed by an idler wheel bolt, the common rail pump spline seat assembly includes an intermediate shaft, a common rail pump spline seat bearing and a common rail pump spline seat with a gear on the outer circumference, one end of the intermediate shaft is clamped on the inner wall of the gear chamber body on the idler wheel cover plate side and fixed by an intermediate shaft bolt, the high-pressure common rail pump is installed on the common rail pump installation port through a flange plate, and the output head of the high-pressure common rail pump is connected to the common rail pump spline seat through a spline fit, and the idler wheel gear is meshed with the gear on the common rail pump spline seat.
[0005] It is further characterized in that the idler bearing and the common rail pump spline seat bearing each include two bearings arranged side by side with a bearing spacer and a hole retaining ring provided therebetween;
[0006] A shaft thrust ring is arranged between the idler assembly and the inner wall of the gear chamber body, and between the common rail pump spline seat assembly and the inner wall of the gear chamber body. The idler shaft comprises an idler shaft body and an idler shaft pressure plate. The idler bolt passes through the idler shaft pressure plate and the idler shaft body. The idler shaft pressure plate presses the idler bearing. The intermediate shaft comprises an intermediate shaft body and an intermediate shaft pressure plate. The intermediate shaft bolt passes through the intermediate shaft pressure plate and the intermediate shaft body. The intermediate shaft pressure plate presses the common rail pump spline seat bearing.
[0007] The idler shaft body and the idler shaft pressure plate are provided with corresponding idler axial through holes, the intermediate shaft body and the intermediate shaft pressure plate are provided with corresponding intermediate axial through holes, an oil gap is left between the idler shaft body and the idler shaft pressure plate, and between the intermediate shaft body and the intermediate shaft pressure plate, and the gear chamber body is provided with oil inlet through holes corresponding to the idler assembly and the common rail pump spline seat assembly and is installed with a lubricating oil pipe.
[0008] After the utility model is adopted, the high-pressure common rail pump is installed on the gear chamber body, and the transmission structure is composed of two components, namely, the idler wheel assembly and the common rail pump spline seat assembly, which can adapt to high-speed and heavy-load working conditions, and the idler wheel assembly and the common rail pump spline seat assembly can be easily disassembled and assembled, thereby reducing the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a schematic diagram of the structure of the utility model;
[0010] Figure 2 It is a schematic diagram of the gear chamber structure;
[0011] Figure 3 It is a schematic diagram of the structure of the idler wheel assembly;
[0012] Figure 4 It is a schematic diagram of the structure of the common rail pump spline seat assembly. DETAILED DESCRIPTION
[0013] See Figures 1 to 4As shown, a high-pressure common rail pump transmission structure of a V-type engine includes a high-pressure common rail pump 19 and a gear chamber body 13. An idler assembly 1 and a common rail pump spline seat assembly 2 are installed in the gear chamber body 13. An idler installation port is opened on one side of the gear chamber body 13 at the idler assembly 1 and an idler cover plate 6 is installed. A common rail pump installation port is opened on the other side of the gear chamber body 13 at the common rail pump spline seat assembly 2. The idler assembly 1 includes an idler shaft, an idler bearing 1-1 and an idler gear 1-3. The idler shaft includes an idler shaft body 1-2 and an idler shaft pressure plate 1-4. One end of the idler shaft body 1-2 is clamped on the inner wall of the gear chamber body 13 on one side of the common rail pump installation port. An idler bolt 12 penetrates the idler shaft pressure plate 1-4 and the idler shaft body 1-2 to fix them. The idler shaft pressure plate 1-4 presses the idler bearing 1-1.
[0014] The common rail pump spline seat assembly 2 includes an intermediate shaft, a common rail pump spline seat bearing 2-1 and a common rail pump spline seat 2-2 with a gear 2-9 on the outer circumferential surface. The intermediate shaft includes an intermediate shaft body 2-4 and an intermediate shaft pressure plate 2-5. One end of the intermediate shaft body 2-4 is clamped on the inner wall of the gear chamber body 13 on one side of the idler cover plate 6. The intermediate shaft bolt 15 passes through the intermediate shaft pressure plate 2-5 and the intermediate shaft body 2-4 to fix them. The intermediate shaft pressure plate 2-5 presses the common rail pump spline seat bearing 2-1. The high-pressure common rail pump 19 is installed on the common rail pump installation port through the flange plate 18, and the external spline on the output head 20 of the high-pressure common rail pump is matched and connected with the internal spline 2-3 on the common rail pump spline seat 2-2. The idler gear 1-3 is meshed with the gear 2-9 on the common rail pump spline seat 2-2.
[0015] The idler bearing 1-1 and the common rail pump spline seat bearing 2-1 each include two bearings arranged side by side, and a bearing spacer 1-5 and a hole retaining ring 1-6 are arranged between the idler bearings 1-1, and a bearing spacer 2-8 and a hole retaining ring 2-6 are arranged between the common rail pump spline seat bearing 2-1; a shaft thrust ring 16 and a shaft thrust ring 2 are arranged between the idler assembly 1 and the inner wall of the gear chamber body 13, and between the common rail pump spline seat assembly 2 and the inner wall of the gear chamber body 13. The double bearing structure is better suitable for high-speed and heavy-load working conditions.
[0016] In the figure, 8 and 17 are fixing bolts 1 and 2 for fixing the idler cover plate 6 and the flange plate 18 respectively. The entire gear chamber body 13 and the internal transmission mechanism can be easily disassembled and assembled, which further reduces the difficulty of disassembly and assembly, simplifies the assembly process, and improves the assembly efficiency. The sealing ring 7 can ensure the sealing performance.
[0017] The idler shaft body 1-2 and the idler shaft pressure plate 1-4 are provided with corresponding idler axial through holes 1-7, the intermediate shaft body 2-4 and the intermediate shaft pressure plate 2-5 are provided with corresponding intermediate axial through holes 2-7, and oil gaps are left between the idler shaft body 1-2 and the idler shaft pressure plate 1-4, and between the intermediate shaft body 2-4 and the intermediate shaft pressure plate 2-5. The gear chamber body 13 is provided with oil inlet through holes corresponding to the idler assembly 1 and the common rail pump spline seat assembly 2, and lubricating oil pipe 1-4 and lubricating oil pipe 2-11 are respectively installed. The lubricating oil pipe 1-4 is installed through a transition joint 1-5 with a sealing gasket 1-3, and the lubricating oil pipe 2-11 is installed through a transition joint 2-10 with a sealing gasket 2-9. The lubricating oil enters from the lubricating oil pipe 1-4 and the lubricating oil pipe 2-11, and can flow to the bearing well through the axial through holes and the oil gap, which is beneficial to the lubrication of the bearing, reduces the wear and damage of the bearing, extends the service life of the bearing, improves the operation stability and reliability, and reduces the noise and vibration.
[0018] Since the present application is assembled from two components of a double-bearing structure, the product not only has a high load-bearing capacity, good centering and guiding properties, but also has a small stress concentration; the flowing lubricating oil is beneficial to the lubrication of the bearings and the cooling and heat dissipation of the bearings. The friction and wear of the bearings are effectively reduced, and the service life of the bearings is extended. The transmission is driven by the meshing of the idler gear 1-3 and the gear 2-9 of the spline seat 2-2 of the common rail pump, and the internal spline 2-3 of the spline seat 2-2 of the common rail pump is matched with the external spline on the output head 20 of the output shaft of the high-pressure common rail pump 19. This can effectively provide power for the oil pumping structure of the high-pressure common rail pump 19.
Claims
1. A high-pressure common rail pump transmission structure of a V-type engine, comprising a high-pressure common rail pump and a gear chamber body, characterized in that: An idler assembly and a common rail pump spline seat assembly are installed in the gear chamber body, an idler installation port is opened on one side of the gear chamber body at the idler assembly and an idler cover plate is installed, and a common rail pump installation port is opened on the other side of the gear chamber body at the common rail pump spline seat assembly, the idler assembly includes an idler shaft, an idler bearing and an idler gear, one end of the idler shaft is clamped on the inner wall of the gear chamber body on the side of the common rail pump installation port and is fixed by an idler bolt, the common rail pump spline seat assembly includes an intermediate shaft, a common rail pump spline seat bearing and a common rail pump spline seat with a gear on the outer circumference, one end of the intermediate shaft is clamped on the inner wall of the gear chamber body on the side of the idler cover plate and is fixed by an intermediate shaft bolt, the high-pressure common rail pump is installed on the common rail pump installation port through a flange plate, and the output head of the high-pressure common rail pump is connected to the common rail pump spline seat through a spline fit, and the idler gear is meshed with the gear on the common rail pump spline seat.
2. A high pressure common rail pump transmission structure for a V-type engine according to claim 1, characterized in that: Two idler bearings are arranged side by side, and a bearing spacer and a hole retaining ring are arranged between the two idler bearings. Two common rail pump spline seat bearings are arranged side by side, and a bearing spacer and a hole retaining ring are arranged between the two common rail pump spline seat bearings.
3. The high-pressure common rail pump transmission structure of a V-type engine according to claim 1, characterized in that: A shaft thrust ring is arranged between the idler assembly and the inner wall of the gear chamber body, and between the common rail pump spline seat assembly and the inner wall of the gear chamber body. The idler shaft includes an idler shaft body and an idler shaft pressure plate. The idler bolt passes through the idler shaft pressure plate and the idler shaft body, and the idler shaft pressure plate presses the idler bearing. The intermediate shaft includes an intermediate shaft body and an intermediate shaft pressure plate. The intermediate shaft bolt passes through the intermediate shaft pressure plate and the intermediate shaft body, and the intermediate shaft pressure plate presses the common rail pump spline seat bearing.
4. A high pressure common rail pump transmission structure for a V-type engine according to claim 3, characterized in that: The idler shaft body and the idler shaft pressure plate are provided with corresponding idler axial through holes, the intermediate shaft body and the intermediate shaft pressure plate are provided with corresponding intermediate axial through holes, an oil gap is left between the idler shaft body and the idler shaft pressure plate, and between the intermediate shaft body and the intermediate shaft pressure plate, and the gear chamber body is provided with oil inlet through holes corresponding to the idler assembly and the common rail pump spline seat assembly and is installed with a lubricating oil pipe.