Split type pump body for high-pressure oil supply pump

Abstract

The invention provides a split type pump body for a high-pressure oil supply pump. The split type pump body comprises an upper pump body, a lower pump body and a plurality of supporting assemblies. The upper pump body is detachably arranged on the top of the lower pump body, a first containing groove is formed in the upper pump body, and a second containing groove is formed in the lower pump body. The supporting assembly comprises an upper bearing bush and a lower bearing bush. A plurality of first mounting seats are arranged in the first accommodating groove, a first mounting groove is formed in each first mounting seat, a plurality of second mounting seats are arranged in the second accommodating groove, and a second mounting groove is formed in each second mounting seat. A first oil guide hole is formed in the first mounting groove and communicates with an engine oil supply cavity in the upper pump body. The upper bearing bush is provided with a first communicating hole and a first oil storage groove, and the aperture of the first communicating hole is smaller than that of the first oil guide hole. According to the split type pump body for the high-pressure oil supply pump, good lubricating and supporting effects can be provided for a cam shaft, and the rotating effect of the cam shaft is prevented from being affected.

Description

Technical Field

[0001] The invention belongs to the field of high-pressure oil supply equipment, and in particular relates to a split pump body for a high-pressure oil supply pump. Background Art

[0002] The high-pressure fuel supply pump is the core component of diesel engine electronic fuel injection technology. When working, the high-pressure fuel supply pump can convert low-pressure fuel into high-pressure fuel, and with the cooperation of the electronic controller and other components, it can accurately and quickly realize the fuel injection action.

[0003] In the prior art, high-pressure fuel supply pumps generally adopt an integral pump body structure so that the pump body has sufficient strength and improves the reliability of the fuel injection action. However, in actual application, due to the installation position of the high-pressure fuel supply pump and the actual size and shape requirements, the design volume of the camshaft cavity in the pump body is usually small, which will cause the lubricating oil flow rate of the camshaft cavity inside the pump body to become low, and the support components of the camshaft cannot be effectively lubricated and cooled, thereby causing wear of the support components. In addition, since the camshaft inside the pump body requires multiple support components for multi-point support, and multiple support components will inevitably have small size differences within the allowable tolerance range, the magnitude of the force on different support components will also be different during the actual working process. When the camshaft rotates at high speed, the difference in the force on different support components will not only aggravate the wear of the main force-bearing support components, but also interfere with the high-speed rotation of the camshaft, thereby affecting the working effect of the high-pressure fuel supply pump. Summary of the invention

[0004] In view of this, the present invention aims to provide a split pump body for a high-pressure oil supply pump to solve the above technical problems.

[0005] To achieve the above object, the technical solution created by the present invention is implemented as follows:

[0006] A split pump body for a high-pressure oil supply pump, comprising: an upper pump body, a lower pump body and a plurality of support assemblies; the upper pump body is detachably arranged on the top of the lower pump body, a first receiving groove is arranged on the bottom surface of the upper pump body, a second receiving groove is arranged on the top surface of the lower pump body, and a receiving cavity for receiving a camshaft is formed by relatively splicing the first receiving groove and the second receiving groove; a plurality of the support assemblies are arranged in the receiving cavity at intervals, and each support assembly comprises an upper bearing and a lower bearing; a plurality of first mounting seats are arranged in the first receiving groove, and a mounting seat for receiving a camshaft is provided on each first mounting seat A first mounting groove of the upper bearing shell is provided with multiple second mounting seats inside the second accommodating groove, and the multiple second mounting seats are arranged one-to-one corresponding to the multiple first mounting seats, and each second mounting seat is provided with a second mounting groove for accommodating the lower bearing shell; a first oil guide hole is provided inside the first mounting groove, and the first oil guide hole is connected with the oil supply chamber in the upper pump body; a first connecting hole is provided on the upper bearing shell, and a first oil storage tank is provided on the side wall of the upper bearing shell facing the lower bearing shell, the first connecting hole is connected with the first oil storage tank, and the aperture of the first connecting hole is smaller than the aperture of the first oil guide hole.

[0007] Furthermore, an oil collecting groove is provided on the side wall of the upper bearing shell facing the first mounting groove, the first connecting hole is arranged inside the oil collecting groove, and the first oil guide hole is connected with the oil collecting groove.

[0008] Furthermore, a second oil storage tank is provided on the side wall of the lower bearing shell facing the upper bearing shell, and the second oil storage tank is connected to the first oil storage tank.

[0009] Furthermore, an oil guide cavity is provided inside the lower pump body, and a second oil guide hole is provided inside each second mounting groove, and the second oil guide hole is connected with the oil guide cavity; a second connecting hole is provided on the lower bearing shell, and the second connecting hole is connected with the second oil storage tank, and the aperture of the second connecting hole is smaller than the aperture of the second oil guide hole.

[0010] Furthermore, an oil collecting pipe is provided on the side wall of the lower bearing shell facing the second installation groove, the second connecting hole is arranged inside the oil collecting pipe, and a splicing ring groove for accommodating the oil collecting pipe is provided inside the second installation groove.

[0011] Furthermore, a first positioning protrusion is provided on the upper bearing shell, and a first positioning groove for accommodating the first positioning protrusion is provided inside the first mounting groove.

[0012] Furthermore, a second positioning protrusion is provided on the lower bearing shell, and a second positioning groove for accommodating the second positioning protrusion is provided inside the second mounting groove.

[0013] Compared with the prior art, the split pump body for a high-pressure oil supply pump created by the present invention has the following advantages:

[0014] (1) The present invention creates a split pump body for a high-pressure oil supply pump, wherein the upper pump body and the lower pump body are connected in a detachable manner, and a receiving cavity for receiving the camshaft is formed by the first receiving groove of the upper pump body and the second receiving groove of the lower pump body. Compared with the traditional integral pump body structure, the present device can provide a large design volume for the receiving cavity, which is convenient for the staff to assemble the camshaft. Secondly, the present device can guide the lubricating oil in the oil supply cavity into the first oil storage tank through the first oil guide hole, so that a more sufficient flow of lubricating oil can be obtained between the support assembly and the camshaft, thereby reducing the wear of the support assembly. In addition, the aperture of the first connecting hole in the present device is smaller than the aperture of the first oil guide hole. Therefore, in actual operation, the process of the lubricating oil flowing from the first oil guide hole into the first connecting hole can exert downward pressure on the upper bearing shell, thereby balancing the force of each support assembly and avoiding the high-speed rotation of the camshaft from being affected.

[0015] (2) The present invention creates a split pump body for a high-pressure oil supply pump, in which a second connecting hole is provided on the lower bearing shell, and a second oil guide hole and an oil guide cavity are provided on the lower pump body. In the actual working process, the lubricating oil entering the support assembly can flow into the oil guide cavity along the second connecting hole. Since the second oil guide holes in the plurality of second mounting grooves are all connected to the oil guide cavity, and the aperture of the second connecting hole is smaller than the aperture of the second oil guide hole, when the oil guide cavity is filled with lubricating oil, the plurality of lower bearing shells will obtain upward pressure, thereby further improving the supporting effect of each support assembly in the device on the camshaft. In addition, since an oil collecting pipe is also provided on the lower bearing shell, and a splicing ring groove is provided in the second mounting groove, when the size of a certain lower bearing shell is different from that of other lower bearing shells, the cooperation of the oil collecting pipe and the splicing ring groove can also provide additional storage space for the lubricating oil, so that the lower bearing shells with different sizes can float under the pressure of the lubricating oil, thereby providing a better supporting effect for the camshaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 It is an exploded schematic diagram of a split pump body for a high-pressure fuel supply pump according to an embodiment of the present invention;

[0018] Figure 2 A cross-sectional view of a split pump body for a high-pressure fuel supply pump according to an embodiment of the present invention;

[0019] Figure 3 A schematic diagram of the structure of the upper pump body according to an embodiment of the present invention;

[0020] Figure 4 A schematic diagram of the structure of the lower pump body according to an embodiment of the present invention;

[0021] Figure 5 A cross-sectional view of the lower pump body described in an embodiment of the present invention;

[0022] Figure 6 An exploded view of the support assembly described in the embodiment of the present invention;

[0023] Figure 7 An exploded view of the support assembly described in the embodiment of the present invention at another angle.

[0024] Description of reference numerals:

[0025] 1-upper pump body; 11-first accommodating groove; 12-first mounting seat; 13-first mounting groove; 131-first positioning groove; 14-first oil guide hole; 15-oil supply chamber; 2-lower pump body; 21-second accommodating groove; 22-second mounting seat; 23-second mounting groove; 231-second positioning groove; 232-joining ring groove; 24-second oil guide hole; 25-oil guide cavity; 3-upper bearing; 31-first connecting hole; 32-first oil storage tank; 33-oil collecting tank; 34-first positioning protrusion; 4-lower bearing; 41-second connecting hole; 42-second oil storage tank; 43-oil collecting pipe; 44-second positioning protrusion. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0028] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0030] A split pump body for a high-pressure oil supply pump, the structure of which can be Figure 1-Figure 7 In this embodiment, the split pump body for the high-pressure oil supply pump includes: an upper pump body 1, a lower pump body 2 and a plurality of support components, wherein the upper pump body 1 is detachably arranged on the top of the lower pump body 2, a first receiving groove 11 is arranged on the bottom surface of the upper pump body 1, a second receiving groove 21 is arranged on the top surface of the lower pump body 2, and a receiving cavity for receiving the camshaft is formed by relative splicing of the first receiving groove 11 and the second receiving groove 21, a plurality of support components are arranged in the receiving cavity at intervals, and each support component includes an upper bearing 3 and a lower bearing 4.

[0031] When assembling the high-pressure oil supply pump, the staff can first install the upper bearing bush 3 and the lower bearing bush 4 of the multiple support components into the first receiving groove 11 and the second receiving groove 21 respectively. Then, the camshaft is placed in the second receiving groove 21, and the camshaft is supported by the multiple lower bearing bushes 4. Next, the upper pump body 1 equipped with the upper bearing bush 3 is installed on the lower pump body 2, and the assembly work between the camshaft and the pump body is completed.

[0032] like Figure 3 and Figure 4As shown, in order to realize the assembly between the upper bearing shell 3 and the upper pump body 1, a plurality of first mounting seats 12 are provided inside the first receiving groove 11, and a first mounting groove 13 for accommodating the upper bearing shell 3 is provided on each first mounting seat 12. Correspondingly, in order to realize the assembly between the lower bearing shell 4 and the lower pump body 2, a plurality of second mounting seats 22 are provided inside the second receiving groove 21, and the plurality of second mounting seats 22 are arranged one-to-one with the plurality of first mounting seats 12, and a second mounting groove 23 for accommodating the lower bearing shell 4 is provided on each second mounting seat 22. When assembling the support assembly, the staff can install the upper bearing shell 3 and the lower bearing shell 4 into the first mounting groove 13 and the second mounting groove 23 respectively. Since the plurality of second mounting seats 22 are arranged one-to-one with the plurality of first mounting seats 12, the upper bearing shell 3 and the lower bearing shell 4 in each support assembly will be aligned with each other, so as to facilitate the positioning and support of the camshaft. At the same time, the plurality of support assemblies arranged at intervals can also enable the camshaft to obtain a multi-point support effect, so that the camshaft can obtain a more stable rotation effect.

[0033] Optionally, to prevent the upper bearing shell 3 from moving abnormally in the first mounting groove 13, a first positioning protrusion 34 may be provided on the upper bearing shell 3, and a first positioning groove 131 for accommodating the first positioning protrusion 34 may be provided in the first mounting groove 13, so that the upper bearing shell 3 is limited by means of the first positioning protrusion 34 and the first positioning groove 131. Correspondingly, to prevent the lower bearing shell 4 from moving abnormally in the second mounting groove 23, a second positioning protrusion 44 may be provided on the lower bearing shell 4, and a second positioning groove 231 for accommodating the second positioning protrusion 44 may be provided in the second mounting groove 23, so that the lower bearing shell 4 is limited by means of the second positioning protrusion 44 and the second positioning groove 231.

[0034] In order to ensure that the support assembly and the camshaft are adequately supplied with lubricating oil, the present embodiment also introduces the lubricating oil in the oil supply chamber 15 into the interior of the support assembly. Figure 2 As shown, a first oil guide hole 14 is provided inside the first installation groove 13, and the first oil guide hole 14 is connected to the oil supply cavity 15 in the upper pump body 1. Figure 6 and Figure 7 As shown, the upper bearing shell 3 is provided with a first connecting hole 31, and a first oil storage tank 32 is provided on the side wall of the upper bearing shell 3 facing the lower bearing shell 4, and the first connecting hole 31 is connected to the first oil storage tank 32. When working, the lubricating oil in the oil supply cavity 15 will flow to the upper bearing shell 3 along the first guide hole 14, and enter the first oil storage tank 32 along the first connecting hole 31. When the camshaft starts to rotate, the lubricating oil in the first oil storage tank 32 will form an oil film, so that the camshaft and the support assembly can obtain good lubrication and cooling effects, thereby reducing the wear of the support assembly.

[0035] Optionally, in order to increase the lubricating oil content between the support assembly and the camshaft, a second oil reservoir 42 may be further provided on the side wall of the lower bearing shell 4 facing the upper bearing shell 3, and the second oil reservoir 42 should be connected to the first oil reservoir 32. When the lubricating oil enters the first oil reservoir 32 through the first connecting hole 31, the rotation of the camshaft can cause the lubricating oil to enter the second oil reservoir 42, so that a thicker oil film is formed inside the area formed by the second oil reservoir 42 and the first oil reservoir 32, thereby enhancing the lubrication effect of the camshaft.

[0036] In addition, the aperture of the first connecting hole 31 in the present device should be smaller than the aperture of the first oil guide hole 14. When the lubricating oil flows from the first oil guide hole 14 to the first connecting hole 31, since the aperture of the first connecting hole 31 is smaller, the flowing lubricating oil will exert downward pressure on the upper bearing shell 3, so as to balance the force of each supporting component by pressure. In addition, when the lubricating oil exerts pressure on the upper bearing shell 3, the lubricating oil can also flow into the gap between the first mounting groove 13 and the upper bearing shell 3, thereby further improving the cooling effect of the lubricating oil on the supporting component.

[0037] Optionally, in order to enhance the pressure effect of the lubricating oil on the upper bearing shell 3, an oil collecting groove 33 connected with the first oil guide hole 14 may be provided on the side wall of the upper bearing shell 3 facing the first mounting groove 13, and the first connecting hole 31 should be provided inside the oil collecting groove 33. The provision of the oil collecting groove 33 can not only increase the lubricating oil reserve between the first mounting groove 13 and the upper bearing shell 3, increase the pressure exerted by the lubricating oil on the upper bearing shell 3, but also guide the lubricating oil, so that the lubricating oil flowing out of the first oil guide hole 14 can enter the first connecting hole 31.

[0038] In actual operation, due to the tolerance of the support assembly in a certain range, the sizes of the multiple support assemblies may be slightly different. At the same time, the wear degree of the multiple support assemblies may also be slightly different after the camshaft runs for a long time. In order to prevent the rotation state of the camshaft from being affected by the slight differences between the multiple support assemblies, the present embodiment can also adjust the position of the lower bearing 4 by means of the pressure of the lubricating oil.

[0039] Specifically, Figure 5 As shown, the lower pump body 2 may be provided with an oil guide cavity 25, and each second mounting groove 23 may be provided with a second oil guide hole 24, and the second oil guide hole 24 is connected to the oil guide cavity 25. Figure 6 and Figure 7 As shown, the lower bearing shell 4 may also be provided with a second communicating hole 41 communicating with the second oil storage groove 42 , and the aperture of the second communicating hole 41 should be smaller than the aperture of the second oil guide hole 24 .

[0040] When the external oil supply pipeline continuously delivers lubricating oil to the oil supply chamber 15, the lubricating oil in the support assembly will flow along the second connecting hole 41 to between the lower bearing shell 4 and the second mounting groove 23. Since the aperture of the second connecting hole 41 is smaller than the aperture of the second oil guide hole 24, when the oil supply pressure in the oil supply chamber 15 is sufficient, the lubricating oil between the lower bearing shell 4 and the second mounting groove 23 will exert upward pressure on the lower bearing shell 4, thereby adjusting the position of the lower bearing shell 4 with the help of oil pressure to ensure that the camshaft obtains a good support effect. Correspondingly, since the second oil guide holes 24 in the multiple second mounting grooves 23 are all connected to the oil guide cavity 25, the oil pressure borne by the multiple lower bearing shells 4 will be distributed through the oil guide cavity 25, so that the lower bearing shells 4 with different sizes or wear degrees can all provide sufficient support for the camshaft.

[0041] Optionally, in order to improve the position adjustment range of the lower bearing shell 4, an oil collecting pipe 43 may be provided on the side wall of the lower bearing shell 4 facing the second mounting groove 23, the second communicating hole 41 is provided inside the oil collecting pipe 43, and a splicing ring groove 232 for accommodating the oil collecting pipe 43 is provided inside the second mounting groove 23. Since the second communicating hole 41 is provided inside the oil collecting pipe 43, the cooperation of the oil collecting pipe 43 and the splicing ring groove 232 can also provide additional storage space for lubricating oil, so that the lower bearing shell 4 can obtain a larger floating range, and further improve the support capacity for the camshaft.

[0042] The effects of the above scheme are described below:

[0043] This embodiment provides a split pump body for a high-pressure oil supply pump, which can provide a larger accommodation area for the camshaft through the upper pump body and the lower pump body, and can guide the lubricating oil inside the oil supply cavity into the support assembly, thereby providing good lubrication and cooling effects for the camshaft. In addition, the device can also apply pressure to the upper bearing and the lower bearing by means of the lubricating oil, so that the upper bearing and the lower bearing can better support the camshaft, and balance the forces of multiple support assemblies, ensuring that the camshaft obtains a good rotation effect.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A split pump body for a high-pressure oil supply pump, characterized in that: include: An upper pump body (1), a lower pump body (2) and a plurality of support components; the upper pump body (1) is detachably arranged on the top of the lower pump body (2); a first receiving groove (11) is provided on the bottom surface of the upper pump body (1), and a second receiving groove (21) is provided on the top surface of the lower pump body (2); and a receiving cavity for receiving a camshaft is formed by relatively splicing the first receiving groove (11) and the second receiving groove (21); a plurality of support components are arranged in the receiving cavity at intervals, and each support component comprises an upper bearing bush (3) and a lower bearing bush (4); a plurality of first mounting seats (12) are provided in the first receiving groove (11), and each first mounting seat (12) is provided with a first mounting groove (13) for receiving the upper bearing bush (3), and a plurality of first mounting seats (12) are provided with a first mounting groove (13) for receiving the upper bearing bush (3), and a plurality of first mounting seats (12) are provided with a first mounting groove (13) for receiving the upper bearing bush (3), and a plurality of first mounting seats (12) are provided with a first mounting groove (13) for receiving the upper bearing bush (3) in the second receiving groove (2 1) A plurality of second mounting seats (22) are arranged inside, the plurality of second mounting seats (22) are arranged one-to-one with the plurality of first mounting seats (12), and a second mounting groove (23) for accommodating a lower bearing shell (4) is provided on each second mounting seat (22); a first oil guide hole (14) is provided inside the first mounting groove (13), and the first oil guide hole (14) is connected to an oil supply chamber (15) in the upper pump body (1); a first connecting hole (31) is provided on the upper bearing shell (3), and a first oil storage groove (32) is provided on the side wall of the upper bearing shell (3) facing the lower bearing shell (4); the first connecting hole (31) is connected to the first oil storage groove (32), and the aperture of the first connecting hole (31) is smaller than the aperture of the first oil guide hole (14).

2. A split pump body for a high-pressure oil supply pump according to claim 1, characterized in that: An oil collecting groove (33) is provided on the side wall of the upper bearing shell (3) facing the first installation groove (13), the first connecting hole (31) is arranged inside the oil collecting groove (33), and the first oil guide hole (14) is connected to the oil collecting groove (33).

3. The split pump body for a high-pressure oil supply pump according to claim 1, characterized in that: A second oil storage groove (42) is provided on the side wall of the lower bearing shell (4) facing the upper bearing shell (3), and the second oil storage groove (42) is connected to the first oil storage groove (32).

4. A split pump body for a high-pressure oil supply pump according to claim 3, characterized in that: An oil guide cavity (25) is provided inside the lower pump body (2), and a second oil guide hole (24) is provided inside each second mounting groove (23), and the second oil guide hole (24) is connected to the oil guide cavity (25); a second connecting hole (41) is provided on the lower bearing shell (4), and the second connecting hole (41) is connected to the second oil storage tank (42), and the aperture of the second connecting hole (41) is smaller than the aperture of the second oil guide hole (24).

5. A split pump body for a high-pressure oil supply pump according to claim 4, characterized in that: An oil collecting pipe (43) is provided on the side wall of the lower bearing shell (4) facing the second installation groove (23), the second connecting hole (41) is arranged inside the oil collecting pipe (43), and a splicing ring groove (232) for accommodating the oil collecting pipe (43) is provided inside the second installation groove (23).

6. The split pump body for a high-pressure oil supply pump according to claim 1, characterized in that: The upper bearing shell (3) is provided with a first positioning protrusion (34), and a first positioning groove (131) for accommodating the first positioning protrusion (34) is provided inside the first installation groove (13).

7. The split pump body for a high-pressure oil supply pump according to claim 1, characterized in that: The lower bearing shell (4) is provided with a second positioning protrusion (44), and a second positioning groove (231) for accommodating the second positioning protrusion (44) is provided inside the second installation groove (23).

Images