Mounting structure for pressure-limiting valve of oil pump

Abstract

The utility model discloses an oil pump pressure-limiting valve mounting structure, which relates to the technical field of limiting valves, and comprises a shell, the inner side of the shell is in threaded connection with a valve body, the top end of the valve body is fixedly connected with a bonnet, the top end of the bonnet is movably sleeved with a control shell, and the outer side of the control shell is movably connected with a plurality of sealing blocks. The sealing block abuts against the inner wall of the shell, an adjusting assembly is arranged in the control shell, and the adjusting assembly is connected with the back side of the sealing block. By means of the adjusting assembly, in the downward rotation process of the synchronous rod, the circular truncated cone is driven to move downwards synchronously, the arc face of the circular truncated cone is attached to the inclined face of the push block, so that the push block, the connecting block and the sealing block move away from the circular truncated cone, and the outer side of the sealing block is tightly attached to the inner side of the shell; and in addition, through the mode that the sealing block is tightly attached to the inner side of the shell, the situation that fine particulate matter penetrates through gaps is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of limit valve, specifically a machine oil pump pressure limiting valve mounting structure. BACKGROUND

[0002] The machine oil pump is the core component in the engine lubricating system, and its main function is to deliver the machine oil from the oil pan to each friction part of the engine to ensure the normal operation of the engine and prolong its service life. The pressure limiting valve, as an important component of the machine oil pump, is used to adjust the output pressure of the machine oil pump to prevent the system pressure from being too high or too low, thereby ensuring the stability and reliability of the engine lubricating system. The mounting structure of the pressure limiting valve directly affects its sealing performance and working effect, so the installation design of the pressure limiting valve plays an important role in the overall performance of the machine oil pump.

[0003] The traditional machine oil pump pressure limiting valve mounting structure usually adopts a simple threaded connection method, which is convenient to install, but has many problems in actual use. First, since the connection between the pressure limiting valve and the shell relies only on threaded fixing, it is easy to cause connection loosening due to vibration or temperature change, which in turn causes oil leakage or external particulate matter to enter the valve body, affecting the normal work of the pressure limiting valve. Secondly, the traditional structure lacks multi-stage sealing design, which cannot effectively prevent small particles from entering the valve body through the gap, causing the internal wear of the valve body to increase and shorten its service life. In addition, the sealing element of the existing mounting structure usually needs to be operated separately, and the installation and disassembly process is complicated, which increases the maintenance difficulty and cost. Therefore, a machine oil pump pressure limiting valve mounting structure is needed to solve the existing problems. SUMMARY

[0004] Technical problems solved

[0005] The utility model aims at making up for the deficiency of prior art, and provides a machine oil pump pressure limiting valve mounting structure, which reduces the penetration of small particles through the gap by setting the adjusting assembly, improves the service life of the valve body by setting the control assembly, and realizes layer-by-layer sealing protection only by operating a single rotating block, which is simple and convenient to operate.

[0006] Technical scheme

[0007] To achieve the above object, the utility model provides following technical scheme: A kind of oil pump pressure limiting valve mounting structure, including shell, the inner side of the shell is threadedly connected with valve body, and the top end of valve body is fixedly connected with valve cap, the top end of valve cap movably sheaths control shell, the outer side of control shell movably connects with several sealing blocks, and sealing block is in abutment with the inner wall of shell, adjusting assembly is provided in the inside of control shell, and adjusting assembly is connected with the back of sealing block, the top end of control shell is fixedly connected with sealing column, the outer side of sealing column movably connects with a group of symmetrical sealing rings, and sealing ring is in abutment with the inner side of shell, control assembly is provided in the inside of sealing column, one end of control assembly is connected with sealing ring, and the other end of control assembly is connected with adjusting assembly.

[0008] The utility model further provides that the adjusting assembly includes a circular table, a push block, a connecting block and a folding spring, the connecting block is circularly arrayed, the tail end of the connecting block is fixedly connected with the push block, the tail end of the connecting block is fixedly connected with a group of symmetrical folding springs, and the push block is located on the opposite side of the folding spring, the end of the push block away from the connecting block is structured with an inclined surface, and the inclined surface of the push block is fitted with the arc surface of the circular table.

[0009] The utility model further provides that the end of the connecting block away from the push block is fixedly connected with the back of the sealing block, and the end of the folding spring away from the connecting block is fixedly connected in the inside of the control shell.

[0010] The utility model further provides that the control assembly includes a guide column, a control ring, a push frame and a connecting rod, a group of symmetrical control rings are movably connected on the guide column, a plurality of groups of symmetrical connecting rods are movably connected with the outer side of the control ring through a rotating shaft, the end of the connecting rod away from the control ring is movably connected with the push frame through a rotating shaft, and the end of the push frame away from the connecting rod is fixedly connected with the inner side of the sealing ring in the closest position of the push frame.

[0011] The utility model further provides that the control assembly further includes a sleeve, the sleeve is rotatably connected at the axis of the guide column, and the guide column is fixedly connected at the axis of the sealing column, a group of symmetrical threads are formed in the outer side of the sleeve, the sleeve penetrates the axis of the control ring, and the sleeve is threadedly connected with the control ring.

[0012] The utility model further provides that the axis of the sleeve is movably connected with a synchronous rod, and the bottom end of the synchronous rod is fixedly connected with the top end of the circular table, and the cross section of the synchronous rod is rectangular.

[0013] The utility model further provides that the top end of the synchronous rod is fixedly connected with a rotating block, threads are formed in the outer side of the rotating block, and the rotating block is movably connected with the inner side of the shell through threads.

[0014] Beneficial effects:

[0015] Compared with the prior art, the oil pump pressure limiting valve mounting structure has the following beneficial effects:

[0016] Firstly, the adjusting assembly is arranged, the synchronous rod is driven to rotate downwards, the circular table is driven to move downwards synchronously, the arc surface of the circular table is matched with the inclined surface of the push block, the push block, the connecting block and the sealing block are driven to move away from the circular table, the outer side of the sealing block is tightly matched with the inner side of the shell, the inner side of the shell and the valve body are filled, the three sealing members are arranged to protect the valve body, the oil leakage or the fine particles entering the valve body from the gap are reduced layer by layer, the valve body is protected, the service life of the valve body is prolonged, and the layer-by-layer sealing protection can be realized only by operating the single rotating block.

[0017] Secondly, the control assembly is arranged, the rotating block is driven to rotate, the inner side of the shell and the sealing block are tightly matched, the two sealing rings are simultaneously expanded and tightly matched with the inner side of the shell, the valve body is protected by the three sealing members, the oil leakage or the fine particles entering the valve body from the gap are reduced layer by layer, the valve body is protected, the service life of the valve body is prolonged, and the layer-by-layer sealing protection can be realized only by operating the single rotating block.

[0018] Other advantages, objects and features of the present application will be apparent to those skilled in the art in view of the following detailed description and drawings. The advantages, objects and features of the present application will be apparent to those skilled in the art in view of the following detailed description and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a three-dimensional structure schematic diagram of the present application;

[0020] Figure 2 It is a shell and valve body structure schematic diagram of the present application;

[0021] Figure 3 It is an adjusting assembly and its connecting member explosion structure schematic diagram of the present application;

[0022] Figure 4 It is a control assembly structure schematic diagram of the present application;

[0023] Figure 5 It is an explosion structure schematic diagram of the control assembly part of the present application.

[0024] In the drawing: 1, shell; 2, valve body; 3, valve cap; 4, control shell; 5, sealing block; 6, adjusting assembly; 601, circular table; 602, push block; 603, connecting block; 604, folding spring; 7, sealing column; 8, sealing ring; 9, control assembly; 901, guide column; 902, control ring; 903, push frame; 904, connecting rod; 905, sleeve; 10, synchronous rod; 11, rotating block. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0026] As shown in Figures 1-5 The utility model provides a kind of technical solutions: a kind of oil pump pressure limiting valve mounting structure, including shell 1, the inner side of shell 1 is threadedly connected with valve body 2, and the top of valve body 2 is fixedly connected with valve cap 3, the top of valve cap 3 movably sheathed with control shell 4, valve cap 3 is regular octagon structure, need with special tool to rotate, the outer side of control shell 4 movably connects with several sealing blocks 5, the number of sealing block 5 is consistent with the number of side of regular octagon, i.e. the number of sealing block 5 is eight, the back side of each sealing block 5 is attached with the side of valve cap 3, and the outer side of sealing block 5 is arc, can be attached with the inner side of shell 1, and sealing block 5 and the inner wall of shell 1 are in contact, the inside of control shell 4 is provided with adjusting assembly 6, and adjusting assembly 6 is connected with the back side of sealing block 5, the top of control shell 4 is fixedly connected with sealing column 7, the outer side of sealing column 7 movably connects with a group of symmetrical sealing rings 8, and sealing ring 8 is in contact with the inner side of shell 1, the inside of sealing column 7 is provided with control assembly 9, one end of control assembly 9 is connected with sealing ring 8, and the other end of control assembly 9 is connected with adjusting assembly 6.

[0027] As shown in Figure 1 And Figure 3 Adjusting assembly 6 includes circular table 601, push block 602, connecting block 603 and folding spring 604, connecting block 603 is circular array distribution, the tail end of connecting block 603 is fixedly connected with push block 602, the tail end of connecting block 603 is fixedly connected with a group of symmetrical folding springs 604, and push block 602 is located on the opposite side of folding spring 604, the end of push block 602 away from connecting block 603 is structured with inclined plane, and the inclined plane of push block 602 is attached with the arc surface of circular table 601, the end of connecting block 603 away from push block 602 is fixedly connected with the back side of sealing block 5 respectively, and the end of folding spring 604 away from connecting block 603 is fixedly connected in the inside of control shell 4.

[0028] In the process of rotating the synchronous rod 10 downward, the circular table 601 is driven to move downward synchronously. Since the arc surface of the circular table 601 is fitted with the inclined surface of the push block 602, the push block 602, the connecting block 603 and the sealing block 5 are moved away from the circular table 601, so that the outer side of the sealing block 5 is tightly fitted with the inner side of the shell 1, thereby filling the excess part of the inner side of the valve body 2 and the shell 1, and reducing the fine particles passing through the gap by tightly fitting the sealing block 5 to the inner side of the shell 1.

[0029] As shown in Figure 1 , Figure 4 and Figure 5 , the control assembly 9 comprises a guide column 901, a control ring 902, a push frame 903 and a connecting rod 904. A group of symmetrical control rings 902 are movably connected on the guide column 901. The outer side of the control ring 902 is movably connected with a plurality of groups of symmetrical connecting rods 904 through a rotating shaft. The end of the connecting rod 904 away from the control ring 902 is movably connected with the push frame 903 through a rotating shaft. The end of the push frame 903 away from the connecting rod 904 is fixedly connected with the inner side of the sealing ring 8 at the closest position of the push frame 903. The control assembly 9 further comprises a sleeve 905, which is rotatably connected at the axis of the guide column 901. The guide column 901 is fixedly connected at the axis of the sealing column 7. A group of symmetrical threads are formed on the outer side of the sleeve 905. The sleeve 905 penetrates the axis of the control ring 902, and is threadedly connected with the control ring 902. The axis of the sleeve 905 is movably connected with the synchronous rod 10. The bottom end of the synchronous rod 10 is fixedly connected with the top end of the circular table 601. The cross section of the synchronous rod 10 is rectangular. The top end of the synchronous rod 10 is fixedly connected with the rotating block 11. The outer side of the rotating block 11 is provided with threads, and is movably connected with the inner side of the shell 1 through the threads.

[0030] The rotating of the rotating block 11 can simultaneously drive the sealing block 5 to be tightly fitted with the inner side of the shell 1, and drive the two sealing rings 8 to be simultaneously expanded and tightly fitted with the inner side of the shell 1. The valve body 2 is protected by three sealing members in multiple stages, which gradually reduces the oil leakage or the fine particles entering the inside of the valve body 2 from the gap, thereby protecting the valve body 2 and improving the service life of the valve body 2. Only the operation of a single rotating block 11 is needed to realize the layer-by-layer sealing protection, which is simple and convenient to operate.

[0031] Working principle: in use, the shell 1 is part of the oil pump, used to limit the installation position of the valve; first, the valve body 2 is screwed into the inside of the shell 1 by a tool, then the control shell 4 is sleeved on the outside of the valve cap 3, and the sealing block 5 occupies the area outside the valve cap 3, then the rotating block 11 is turned down, so that the bottom of the rotating block 11 is screwed with the inside of the top of the shell 1, in the process, the synchronous rod 10 is turned together, driving the sleeve 905 to rotate inside the guide column 901, since the sleeve 905 is screwed with the two control rings 902, and the guide column 901 limits the moving direction of the control ring 902, so that the two control rings 902 move away from each other, driving the connecting rod 904 to rotate, so that the push frame 903 moves away from the sleeve 905, so as to simultaneously expand the two sealing rings 8 outward, until the outside of the sealing ring 8 abuts against the inside of the shell 1, tightly fitted; in the process of downward rotation of the synchronous rod 10, the circular platform 601 is synchronously moved downward, since the arc surface of the circular platform 601 is fitted with the inclined surface of the push block 602, so that the push block 602, the connecting block 603 and the sealing block 5 move away from the circular platform 601, so that the outside of the sealing block 5 is tightly fitted with the inside of the shell 1.

[0032] It is understood that, in the development of any actual implementation, numerous implementation-specific decisions can be made. Such development efforts, while possibly complex and time-consuming, would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure.

[0033] It should be noted that the above examples are only used to illustrate the technical solutions of the present application but not limit the present application, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. An oil pump pressure limiting valve mounting structure comprising a housing (1), characterized by: The inner side of the shell (1) is threadedly connected with a valve body (2), and the top end of the valve body (2) is fixedly connected with a valve cap (3), the top end of the valve cap (3) movably sheaths a control shell (4), the outer side of the control shell (4) movably connects with a plurality of sealing blocks (5), and the sealing blocks (5) abut against the inner wall of the shell (1), the inside of the control shell (4) is provided with an adjusting assembly (6), and the adjusting assembly (6) is connected with the back side of the sealing block (5), the top end of the control shell (4) is fixedly connected with a sealing column (7), the outer side of the sealing column (7) movably connects with a group of symmetrical sealing rings (8), and the sealing rings (8) abut against the inner side of the shell (1), the inside of the sealing column (7) is provided with a control assembly (9), one end of the control assembly (9) is connected with the sealing ring (8), and the other end of the control assembly (9) is connected with the adjusting assembly (6).

2. The oil pump pressure limiting valve mounting structure according to claim 1, characterized by: The adjusting assembly (6) comprises a circular truncated cone (601), a push block (602), a connecting block (603) and a folding spring (604), the connecting block (603) is arranged in a circular array, the tail end of the connecting block (603) is fixedly connected with the push block (602), the tail end of the connecting block (603) is fixedly connected with a group of symmetrical folding springs (604), and the push block (602) is located on the opposite side of the folding spring (604), and the end of the push block (602) away from the connecting block (603) is structured with an inclined surface, and the inclined surface of the push block (602) is fitted with the arc surface of the circular truncated cone (601).

3. The oil pump pressure limiting valve mounting structure according to claim 2, characterized by: The end of the connecting block (603) away from the push block (602) is fixedly connected with the back side of the sealing block (5) respectively, and the end of the folding spring (604) away from the connecting block (603) is fixedly connected in the inside of the control shell (4).

4. The oil pump pressure limiting valve mounting structure according to claim 1, characterized by: The control assembly (9) comprises a guide column (901), a control ring (902), a push frame (903) and a connecting rod (904), the guide column (901) movably connects with a group of symmetrical control rings (902), the outer side of the control ring (902) movably connects with a plurality of groups of symmetrical connecting rods (904) through the pivot, and the end of the connecting rod (904) away from the control ring (902) movably connects with the push frame (903) through the pivot, and the end of the push frame (903) away from the connecting rod (904) is fixedly connected with the inner side of the sealing ring (8) closest to the push frame (903).

5. The oil pump pressure limiting valve mounting structure according to claim 4, characterized by: The control assembly (9) further comprises a sleeve (905), the sleeve (905) is rotationally connected at the axis of the guide column (901), and the guide column (901) is fixedly connected at the axis of the sealing column (7), a group of symmetrical threads are formed on the outer side of the sleeve (905), the sleeve (905) penetrates the axis of the control ring (902), and the sleeve (905) is threadedly connected with the control ring (902).

6. The oil pump pressure limiting valve mounting structure according to claim 5, characterized by: The axis of the sleeve (905) movably connects with a synchronous rod (10), and the bottom end of the synchronous rod (10) is fixedly connected with the top end of the circular truncated cone (601), and the cross section of the synchronous rod (10) is rectangular.

7. The oil pump pressure limiting valve mounting structure according to claim 6, characterized by: The top end of the synchronizing lever (10) is fixedly connected with a rotating block (11), the outer side of the rotating block (11) is provided with a thread, and the rotating block (11) is movably connected with the inner side of the shell (1) through the thread.

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