Oil return pipe with auxiliary fixing function

Abstract

The utility model belongs to the technical field of rubber pipelines, and particularly relates to an oil return pipe with an auxiliary fixing function. The oil return pipe structurally comprises a rubber pipe body and further comprises a screw joint frame body unit, a connecting plate arranged on the screw joint frame body unit and a fixing circular ring arranged on the connecting plate and used for being connected with the rubber pipe body in a sleeved mode. And the internal thread pipe unit is arranged on the connecting plate, and is used for installing the screw joint frame body unit in a manner that the internal thread pipe unit is firstly taken down from the connecting plate and then an oil return system fixing piece is welded. The oil return pipe at least has the beneficial effects that the rubber pipe body can obtain an effective auxiliary fixing function at the fixing circular ring, so that the middle section of the pipe body which is originally easy to shake is clamped and limited, and the installation stability degree of the oil return pipe is remarkably improved.

Description

Technical Field

[0001] This application belongs to the field of rubber hose technology, and in particular relates to a return oil pipe with auxiliary fixing function. Background Technology

[0002] Generally, the aforementioned return fuel line is used in environments such as hydraulic systems, engine fuel systems, lubrication systems, and air conditioning systems. Taking the engine fuel system as an example, the function of the return fuel line in this system can be to return excess fuel from the fuel pump to the fuel tank.

[0003] Correspondingly, the main structural components of the return oil pipe include a rubber tube body and a fastener at each end of the tube body, which is generally a stainless steel cable tie.

[0004] On the other hand, the auxiliary reinforcement structure corresponding to the above-mentioned auxiliary fixing function is installed relatively far from the end of the rubber tube body. It is mainly used to reinforce the middle part of the rubber tube body. This is more important for the relatively long return oil pipe. In fact, more than one of the above-mentioned auxiliary reinforcement structures can be used on a long return oil pipe.

[0005] For example, Chinese utility model patent with authorization announcement number CN221879542U and authorization announcement date of October 22, 2024 discloses a turbocharger return oil pipe fixing device, whose main structural components include: connecting pipe, first corrugated pipe, second corrugated pipe, docking plate, bolt, nut, limit rod, circular groove, docking pipe, sealing gasket, convex strip, circular hole, and oil guide hole.

[0006] The advantages of the return oil pipe in this utility model patent are: it is less likely to cause the bolts to loosen due to engine vibration or bumpy road surface, thus ensuring the stability of the return oil pipe after it is fixed.

[0007] However, in actual use, the return pipe has at least the following impractical problems: the reinforcement required for the connecting pipe can only be obtained from the two corrugated pipes. While the corrugated pipes do have a certain degree of resistance to bending, they are difficult to limit and fix the connecting pipe. Especially when the length of the connecting pipe is relatively large, the connecting pipe is prone to shaking, eventually leading to oil leakage at the interface between the connecting pipe and the corrugated pipe. Utility Model Content

[0008] This application provides a return oil pipe with auxiliary fixing function. The technical problem to be solved is: how to make the installation of the return oil pipe more stable and less prone to shaking.

[0009] The technical solution adopted by this application to solve the above problems is: a return oil pipe with auxiliary fixing function, the structure includes a rubber pipe body, a screw-connector frame unit, a connecting plate disposed on the screw-connector frame unit, a fixing ring disposed on the connecting plate and used to fit the rubber pipe body, and an internally threaded pipe unit disposed on the connecting plate and used to install the screw-connector frame unit by first removing it from the connecting plate and then welding the return oil system fixing component.

[0010] A further preferred technical solution is that the screw-fit frame unit includes a mounting plate with the connecting plate, a mounting hole on the mounting plate, and a fixing bolt on the mounting hole for connecting the internal threaded pipe unit or the screw hole of the fastener.

[0011] A further preferred technical solution is that the connecting plate is also provided with an idle screw for installing the internally threaded pipe unit.

[0012] A further preferred technical solution is that the internally threaded pipe unit includes a cuboid block for welding the oil return system fixing component, and a threaded hole provided on the cuboid block for installing the fixing bolt.

[0013] A further preferred technical solution is that: the fixing ring is also provided with an axial opening, and a stainless steel cable tie is provided on the axial opening and used to connect the rubber tube body and the external pipe of the oil return system after being removed.

[0014] A further preferred technical solution is that the internally threaded tube unit also includes an idle anti-loss hole disposed on the cuboid block and used for passing through the stainless steel cable tie.

[0015] A further preferred technical solution is that the number of axial openings and stainless steel cable ties is ≥3.

[0016] A further preferred technical solution is that: when the internally threaded tube unit is installed on the idle screw, the internally threaded tube unit is located on the retraction path of the fixing bolt, and the distance between the internally threaded tube unit and the mounting plate is less than the length of the fixing bolt.

[0017] A further preferred technical solution is that the length of the threaded hole is greater than the length of the fixing bolt.

[0018] A further preferred technical solution is that the fixed ring is also provided with a ring displacement cut for extruding and inserting the already deformed rubber tube body.

[0019] The beneficial effects of this application include at least the following three points.

[0020] First, the rubber hose body can obtain an effective auxiliary fixing function at the fixing ring, so that the middle section of the hose body, which is originally the most prone to shaking, is locked and limited, which significantly improves the stability of the oil return pipe installation.

[0021] Secondly, the auxiliary fixing function of the return oil pipe has the advantages of strong practicality and wide applicability. It can be installed directly on the bolt hole of the fixing part or on the internal threaded pipe unit, thus making it suitable for different installation environments.

[0022] Third, the auxiliary fixing function itself has high stability, which can maintain an effective fixing state for a long time. Even if the auxiliary fixing structure becomes loose, it is not easy to fall off or be lost. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this application.

[0024] Figure 2 This is a schematic diagram of the first installation method of the return oil pipe in this application.

[0025] Figure 3 This is a schematic diagram of the second installation method of the return oil pipe in this application.

[0026] Figure 4 This is a schematic diagram showing the position of the internally threaded pipe unit under the first installation method described above in this application.

[0027] Figure 5 This is a schematic diagram showing the location of the screw holes in the fastener under the second installation method described above in this application.

[0028] Figure 6 This is a schematic diagram showing the location of the axial opening in this application.

[0029] Figure 7 This is a schematic diagram of the stainless steel cable ties in the ready-to-use state in this application.

[0030] Figure 8 This is a schematic diagram of the internally threaded pipe unit in this application.

[0031] Figure 9 This is a schematic diagram illustrating the usage of two internally threaded pipe units that cannot simultaneously support the mounting plate in this application. In this case, the return oil pipe can still be installed stably.

[0032] Figure 10 This is a schematic diagram of one shape of the rubber tube body in this application.

[0033] The meanings of the markings in the diagram are as follows.

[0034] a) Fuel return system fastener, b) Fastener bolt hole, c) Fuel return system external connector, d) Fuel pump, e) Fuel tank, f) Weld.

[0035] 11. Rubber tube body; 11-1, where the bending range is large;

[0036] 1. Threaded frame unit; 2. Connecting plate; 3. Fixing ring; 4. Internal threaded tube unit; 5. Idle screw; 6. Axial opening; 7. Stainless steel cable tie; 8. Ring displacement cut.

[0037] Mounting plate 101, mounting hole 102, fixing bolt 103;

[0038] 401 cuboid block, 402 threaded hole, 403 anti-loss hole for idle state. Detailed Implementation

[0039] The following description is merely a preferred embodiment of this application and is not intended to limit the scope of this application.

[0040] like Figures 1-10 As shown, a return oil pipe with auxiliary fixing function includes a rubber tube body 11, a screw-fitted bracket unit 1, a connecting plate 2 disposed on the screw-fitted bracket unit 1, a fixing ring 3 disposed on the connecting plate 2 and used to fit the rubber tube body 11, and an internally threaded pipe unit 4 disposed on the connecting plate 2 and used to install the screw-fitted bracket unit 1 by first removing it from the connecting plate 2 and then welding the return oil system fixing component a.

[0041] In this embodiment, the rubber tube 11 can be made of fluororubber or EPDM rubber, both of which have outstanding oil resistance, high temperature resistance, and aging resistance. The rubber tube 11 is a round tube, and its overall shape is determined by the oil return system. It is sufficient to ensure that the two ends of the rubber tube 11 are effectively connected and that it has enough installation space. The tube needs to avoid other fixing components in the oil return system.

[0042] For example, one way to install and use the return oil pipe is as follows: one end of the rubber pipe body 11 is fitted onto the external pipe c of the return oil system of the fuel pump d, and the other end is fitted onto the external pipe c of the return oil system of the fuel tank e. The return oil pipe is installed in the engine compartment of the car and returns excess fuel from the fuel pump d to the fuel tank e.

[0043] At this point, the fuel pump d, the fuel tank e, and the vehicle components near them can all be considered as the fuel return system. The aforementioned fuel return system fixture a can be: a component of the subframe, an external protrusion of the fuel pump d, or an external protrusion of the fuel filter. Generally, any fixed structure within the vehicle's engine compartment can serve as the aforementioned fuel return system fixture a.

[0044] Furthermore, when this return oil pipe is used in hydraulic systems, lubrication systems, and air conditioning systems, the return oil system fixing component a can be a relatively completely fixed wall or equipment casing. Alternatively, the aforementioned return oil system fixing component a can be the two ends of the bolted bracket unit 1, allowing the return oil pipe to vibrate together with the two aforementioned end-connecting objects. Both methods can reduce the vibration amplitude in the middle of the return oil pipe, which is beneficial to its installation stability.

[0045] Due to the versatility and uncertainty of the return oil system fixing component a, it is unclear whether welding the internally threaded pipe unit 4 onto it or creating a fixing bolt hole b is more suitable. This return oil pipe combines both of these completely different installation methods, allowing for the selection of either one, which demonstrates its significant practicality in installation and operation.

[0046] The screw-on frame unit 1, connecting plate 2, and fixing ring 3 are integrally formed, and the main body material is metal or engineering plastic. The internal threaded pipe unit 4 can also be made of metal or engineering plastic. It can be used or left idle when installing the return oil pipe, and it can relatively fix the four components of the return oil system fixing component a, fuel pump d, fuel tank e, and rubber hose 11, preventing the rubber hose 11 from shaking significantly and preventing it from falling off at the external connection c of the return oil system.

[0047] As attached Figure 2 As shown, when the internally threaded pipe unit 4 is suitable for welding on the oil return system fixing part a, the two are welded and fixed, the screw frame unit 1 is screwed onto the internally threaded pipe unit 4, and the internally threaded pipe unit 4 is in use.

[0048] As attached Figure 3 As shown, when the internally threaded pipe unit 4 is not suitable for welding on the fixed part a of the oil return system, and it is more suitable to open the bolt hole b of the fixed part, the bolted bracket unit 1 is bolted on the bolt hole b of the fixed part, and the internally threaded pipe unit 4 is idle, which makes the oil return pipe have the advantages of strong practicality and wide applicability.

[0049] The screw-on frame unit 1 includes a mounting plate 101 with the connecting plate 2, a mounting hole 102 on the mounting plate 101, and a fixing bolt 103 on the mounting hole 102 for connecting the internal threaded pipe unit 4 or the fastener screw hole b.

[0050] In this embodiment, the mounting plate 101 is rectangular in shape, the mounting hole 102 is a round hole and does not require threads, and there are two fixing bolts 103.

[0051] On the other hand, the screw-on frame unit 1, the connecting plate 2, the fixing ring 3 and the internal threaded tube unit 4 together form the main part of the auxiliary fixing structure, and more than one of the auxiliary fixing structures can be provided on the rubber tube 11.

[0052] The connecting plate 2 is also provided with an idle screw 5 for installing the internal threaded pipe unit 4.

[0053] In this embodiment, the return oil pipe may require relatively frequent disassembly and relocation, and different installation methods. Therefore, even if the internally threaded pipe unit 4 is not used during installation, it should not be directly removed and retracted. Instead, it can be installed on the idle screw 5 for later use.

[0054] This method does not affect the current installation of the return oil pipe, and it eliminates the need to find new internal threaded pipe fittings for the bolted frame unit 1 when it is reinstalled and used again, which is very convenient and practical.

[0055] However, taking the engine compartment as an example, the safety hazard posed to the engine compartment if the internally threaded pipe unit 4 falls off the idle screw 5 must be considered. Therefore, when not in use, the internally threaded pipe unit 4 can be removed and retracted, and not installed on the idle screw 5 for later use. The idle screw 5 does not limit the usage of the internally threaded pipe unit 4, but merely provides a practical and convenient option.

[0056] The internally threaded pipe unit 4 includes a cuboid block 401 for welding the oil return system fixing component a, and a threaded channel 402 disposed on the cuboid block 401 for installing the fixing bolt 103.

[0057] In this embodiment, the sides of the cuboid block 401 are used to fit against the oil return system fixing component a, and its edges are used to form weld seams f. Compared to a cylindrical block, the cuboid block 401 can achieve more stable welding strength on the oil return system fixing component a.

[0058] The thread pitch and hole spacing parameters of the threaded channel 402 are consistent with those of the fastener threaded hole b.

[0059] The fixing ring 3 is also provided with an axial opening 6, and a stainless steel cable tie 7 is provided on the axial opening 6 and used to connect the rubber tube 11 and the external pipe c of the oil return system after being removed.

[0060] In this embodiment, the stainless steel cable tie 7 is a commercially available product. Before use, the stainless steel cable tie 7 is tied to the axial opening 6 and is part of the oil return pipe product.

[0061] When using the return oil pipe, the stainless steel cable tie 7 needs to be untied from the axial opening 6 and then tied to the end of the rubber tube 11 to strengthen the connection between the end of the rubber tube 11 and the external pipe c of the return oil system.

[0062] In the prior art, the stainless steel cable ties 7 can be untied and reused after being tied.

[0063] The internally threaded tube unit 4 also includes an idle anti-loss hole 403 disposed on the cuboid block 401 and used for passing through the stainless steel cable tie 7.

[0064] In this embodiment, when the stainless steel cable tie 7 passes through the axial opening 6 and the idle anti-loss hole 403 together, the internal threaded tube unit 4 may or may not be screwed onto the idle screw 5.

[0065] The number of axial openings 6 and stainless steel cable ties 7 is ≥3.

[0066] In this embodiment, before use, two stainless steel cable ties 7 are selected to pass through the axial opening 6 and the idle anti-loss hole 403 to ensure that the internally threaded pipe unit 4 is not easily separated from the main structure of the return oil pipe during storage, transportation, and sale. At this time, it is optional whether the internally threaded pipe unit 4 is screwed onto the idle screw 5.

[0067] When the return oil pipe is in use, apart from the two stainless steel cable ties 7 already installed at the ends of the rubber tube body 11, the remaining stainless steel cable ties 7 are used to pass through the axial opening 6 and the idle anti-loss hole 403, making it difficult for the idle internal threaded tube unit 4 to separate from the main structure of the return oil pipe and be lost. At this time, it is not necessary for the internal threaded tube unit 4 to be screwed onto the idle screw 5.

[0068] Correspondingly, if the unused internally threaded tube unit 4 does not need to be removed and retracted, it can be fixed to the internally threaded tube unit 4 and / or the stainless steel cable ties 7. The presence of more than two stainless steel cable ties 7 makes replacement more convenient and quick during installation and use.

[0069] When the internally threaded tube unit 4 is installed on the idle screw 5, the internally threaded tube unit 4 is located on the retraction path of the fixing bolt 103, and the distance between the internally threaded tube unit 4 and the mounting plate 101 is less than the length of the fixing bolt 103.

[0070] In this embodiment, when the internally threaded tube unit 4 is mounted on the idle screw 5, the projection of the former on the mounting plate 101 completely or partially covers the projection of the head of the fixing bolt 103 on the mounting plate 101, thereby giving the fixing bolt 103 the advantage that even if it is loose, it is relatively difficult to fall off or be lost.

[0071] At this time, since the fixing bolt 103 is in use and the internal threaded tube unit 4 is idle, even if the essence of the above-mentioned anti-drop function is to "transfer" the risk of falling and losing to the internal threaded tube unit 4, the anti-drop function is still beneficial.

[0072] Of course, when choosing whether to trigger the above-mentioned anti-fall function, it is still necessary to consider the safety hazards that the internal threaded pipe unit 4 might bring to the oil return system if it falls.

[0073] The length of the threaded channel 402 is greater than the length of the fixing bolt 103.

[0074] In this embodiment, when the end face of the cuboid block 401 is welded to the oil return system fixing component a, if the threaded channel 402 is short and the fixing bolt 103 is long, the fixing bolt 103 cannot be fully screwed into the threaded channel 402, resulting in the screw-on bracket unit 1 being unable to be fixed, which needs to be avoided. Therefore, the above-mentioned length limitation condition is established.

[0075] The length of the threaded channel 402 refers to the opening depth, not the thread length. The opening depth is the length of the cuboid block 401.

[0076] And as attached Figure 2 As shown, at this time, the oil return system fixing component a does not have the problem of blocking the fixing bolt 103. However, the internally threaded pipe unit 4 may not have the same characteristics as shown in the attached figure on the oil return system fixing component a. Figure 2 The installation conditions shown are the reason for setting the aforementioned length limitation.

[0077] On the other hand, as attached Figure 9 As shown, due to the uncertainty of the installation conditions at the fixed part a of the oil return system, the two internally threaded pipe units 4 may not be able to be fixed flush, but this does not affect the tightening and fixing effect at the fixing bolt 103.

[0078] The fixed ring 3 is also provided with a ring displacement break 8 for extruding and inserting the already deformed rubber tube body 11.

[0079] In this embodiment, after the rubber tube 11 is fully and appropriately manually flattened, its thickness is less than the opening width of the ring displacement break 8, so that it can be extruded and separated and inserted at the ring displacement break 8.

[0080] Generally, the ring displacement break 8 is not required. When the fixed ring 3 needs to be moved on the rubber tube 11, it can be directly slid and adjusted, or it can be slid out directly from one end of the rubber tube 11 and then put on and slid at the other end.

[0081] However, when the rubber tube 11 includes a position 11-1 with a large bending radius, the fixing ring 3 will have difficulty passing through that position. If the two ends of the rubber tube 11 have already been fitted onto the external connecting pipe c of the oil return system, then the aforementioned operation of first extruding and then inserting the fixing ring 3 is relatively necessary and sufficiently practical.

[0082] Generally, the opening of the ring displacement break 8 will not significantly affect the fitting and positioning strength of the fixing ring 3 to the rubber tube 11. Even if there is no oil inside the rubber tube 11, it is difficult for it to pass through the ring displacement break 8 and fall off unless it is manually flattened by the operator.

[0083] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various modifications can be made without departing from the spirit of this application. These are non-inventive modifications and are protected by patent law as long as they are within the scope of the claims of this application.

Claims

1. A return oil pipe with auxiliary fixing function, comprising a rubber tube body (11), characterized in that: It also includes a screw-on frame unit (1), a connecting plate (2) disposed on the screw-on frame unit (1), a fixing ring (3) disposed on the connecting plate (2) and used to fit the rubber tube body (11), and an internally threaded tube unit (4) disposed on the connecting plate (2) and used to install the screw-on frame unit (1) by first removing it from the connecting plate (2) and then welding the return oil system fixing component (a).

2. The return oil pipe with auxiliary fixing function according to claim 1, characterized in that: The screw-on frame unit (1) includes a mounting plate (101) with the connecting plate (2), a mounting hole (102) on the mounting plate (101), and a fixing bolt (103) on the mounting hole (102) for connecting the internal threaded tube unit (4) or the fastener screw hole (b).

3. The return oil pipe with auxiliary fixing function according to claim 2, characterized in that: The connecting plate (2) is also provided with an idle screw (5) for installing the internal threaded pipe unit (4).

4. The return oil pipe with auxiliary fixing function according to claim 2, characterized in that: The internally threaded pipe unit (4) includes a cuboid block (401) for welding the return oil system fixture (a), and a threaded channel (402) provided on the cuboid block (401) for installing the fixing bolt (103).

5. A return oil pipe with auxiliary fixing function according to claim 4, characterized in that: The fixed ring (3) is also provided with an axial opening (6) and a stainless steel cable tie (7) provided on the axial opening (6) and used to connect the rubber tube (11) and the external pipe (c) of the oil return system after it is removed.

6. A return oil pipe with auxiliary fixing function according to claim 5, characterized in that: The internally threaded tube unit (4) also includes an idle anti-loss hole (403) disposed on the cuboid block (401) and used for passing through the stainless steel cable tie (7).

7. A return oil pipe with auxiliary fixing function according to claim 5, characterized in that: The number of axial openings (6) and stainless steel cable ties (7) is ≥3.

8. A return oil pipe with auxiliary fixing function according to claim 3, characterized in that: When the internal threaded tube unit (4) is installed on the idle screw (5), the internal threaded tube unit (4) is located on the retraction path of the fixing bolt (103), and the distance between the internal threaded tube unit (4) and the mounting plate (101) is less than the length of the fixing bolt (103).

9. A return oil pipe with auxiliary fixing function according to claim 4, characterized in that: The length of the threaded channel (402) is greater than the length of the fixing bolt (103).

10. A return oil pipe with auxiliary fixing function according to claim 1, characterized in that: The fixed ring (3) is also provided with a ring displacement cut (8) for extruding and inserting the rubber tube body (11) that has been compressed and deformed.

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