Urea tank bolt re-tightening structure

Abstract

The utility model provides a kind of urea tank bolt re-tightening structure. Including urea tank body, the upper portion of the urea tank body is provided with vent valve, the upper portion of the urea tank body is provided with sensor bayonet, the side of the urea tank body is provided with mounting bolt. In the utility model, the stable connection of first support, second support is achieved by mounting bolt, and the cooperation of strap fixing bolt, so that the structure stability of urea tank body is greatly improved after installation, the problem of component loosening caused by tank body shaking during vehicle operation can be effectively avoided;Screw is used to realize the thread connection of compression ring, fixing washer and sealing plate at filling port, to form reliable re-tightening sealing structure, which can be well adapted with urea filling gun to ensure smooth filling, and can also prevent urea leakage, and the structure is convenient to disassemble and maintain in later period;The thread connection of limiting sleeve and feed inlet further strengthens the sealing property of tank body assembly connection.

Description

Technical Field

[0001] This utility model relates to urea storage containers, and in particular to a bolt tightening structure for urea tanks, belonging to the field of automotive parts technology. Background Technology

[0002] A urea tank is a specialized storage container installed in diesel vehicles to store automotive urea solution and provide a reducing agent for the SCR exhaust treatment system. It has a sealing, fixing, and drainage structure.

[0003] Traditional urea tank brackets lack sufficiently robust bolt connections, making the tank prone to shaking and bracket loosening due to vehicle vibrations, thus shortening the overall lifespan of the tank. The filling port sealing structure does not employ a reliable screw tightening method, which easily leads to a decline in sealing performance after long-term use, resulting in significant urea leakage. This not only wastes urea but also pollutes the surrounding environment. Insufficient sealing and assembly stability also allow urea to easily leak from the connection points.

[0004] In addition, traditional urea tanks are mostly made of aluminum alloy, which has limitations in corrosion resistance, aging resistance and temperature adaptability. Under long-term corrosion of urea or in extreme temperature environments ranging from -40℃ to +80℃, the tank is prone to deformation and damage, making it impossible to reliably store urea. The compatibility between the filling port and the urea filling gun is poor, and jamming is prone to occur during filling. Furthermore, due to defects in the sealing structure, the risk of urea leakage is high during filling, which reduces filling efficiency.

[0005] Therefore, a bolt tightening structure for urea tanks is proposed. Utility Model Content

[0006] In view of this, the present invention provides a urea tank bolt re-tightening structure to solve or alleviate the technical problems existing in the prior art, and at least provides a beneficial alternative.

[0007] The technical solution of this utility model is implemented as follows: a urea tank bolt tightening structure includes a urea tank body, a vent valve and a sensor slot on the top of the urea tank body, mounting bolts on the side of the urea tank body, a first bracket and a second bracket mounted on the side of the urea tank body via the mounting bolts, a filling port on the urea tank body, a limiting sleeve inside the filling port, a feed inlet above the limiting sleeve, a pressure ring mounted on the outer wall of the feed inlet, a fixing washer fitted on the feed inlet, a screw inside the fixing washer, a sealing plate extending from the top edge of the filling port along the axial center direction, and cable tie fixing bolts on the side of the urea tank body.

[0008] More preferably, the sealing plate is provided with a threaded groove, and the screw body passes through the fixing washer and the pressure ring and is threadedly connected to the sealing plate.

[0009] More preferably, the sealing plate is in contact with the pressure ring.

[0010] More preferably, the limiting sleeve is provided with a threaded groove, and the bottom of the feed inlet is provided with a threaded connecting seat, which is threadedly connected to the threaded groove.

[0011] More preferably, a drain nut is connected to the bottom of the urea tank, the drain nut has a drain channel, and a drain bolt is threaded into the drain channel.

[0012] More preferably, the urea tank is provided with a urea tank precaution label and a urea tube warning label.

[0013] More preferably, the corners and connections of the urea tank are all transitioned with large rounded corners.

[0014] More preferably, the urea tank is made of low-density polyethylene, and the overall color of the urea tank is black.

[0015] The present invention has the following advantages due to the adoption of the above technical solution:

[0016] I. In this utility model, the stable connection of the first and second brackets by the mounting bolts and the cooperation of the cable ties fixing bolts greatly improves the structural stability of the urea tank after installation, effectively avoiding the problem of component loosening caused by tank shaking during vehicle operation; at the filling port, the screws realize the threaded connection of the pressure ring, fixing gasket and sealing plate to form a reliable re-tightening sealing structure, which can not only be well adapted to the urea filling gun to ensure smooth filling, but also prevent urea leakage, and this structure is easy to disassemble and maintain; the threaded connection of the limiting sleeve and the feed port further enhances the sealing performance of the tank component connection.

[0017] Second, in this utility model, by selecting a tank made of low-density polyethylene and with an overall black color, it can withstand urea corrosion and has excellent aging resistance. It can also work stably in an environment of -40℃ to +80℃. In addition, the tank corners and connections adopt a large rounded corner transition design, which enhances the structural strength and reduces stress concentration. Combined with the reliable connection of each component, it comprehensively ensures the long-term stable use of the urea tank.

[0018] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a front structural diagram of the present invention;

[0022] Figure 3 This is a side view of the present invention.

[0023] Figure 4 This is a schematic diagram of the upward-facing structure of this utility model;

[0024] Figure 5 This is a top view of the structure of this utility model;

[0025] Figure 6 This is a cross-sectional structural diagram of the filling port in this utility model.

[0026] Attached reference numerals: 1. Urea tank body; 2. Vent valve; 3. Sensor bayonet; 4. First bracket; 5. Mounting bolt; 6. Second bracket; 7. Filling port; 8. Feed inlet; 9. Limiting sleeve; 10. Pressure ring; 11. Fixing gasket; 12. Screw; 13. Sealing plate; 14. Drain nut; 15. Drain bolt; 16. Urea tank precaution label; 17. Urea pipe warning label; 18. Cable tie fixing bolt. Detailed Implementation

[0027] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0028] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0029] like Figure 1-6As shown, this utility model embodiment provides a urea tank bolt tightening structure, including a urea tank body 1, a vent valve 2 provided on the top of the urea tank body 1, a sensor bayonet 3 provided on the top of the urea tank body 1, mounting bolts 5 provided on the side of the urea tank body 1, a first bracket 4 and a second bracket 6 installed on the side of the urea tank body 1 by the mounting bolts 5, a filling port 7 provided on the urea tank body 1, a limiting sleeve 9 provided inside the filling port 7, a feed port 8 provided above the limiting sleeve 9, a pressure ring 10 installed on the outer wall of the feed port 8, a fixing gasket 11 sleeved on the feed port 8, a screw 12 provided inside the fixing gasket 11, a sealing plate 13 extending from the top edge of the filling port 7 along the axial center direction, and a cable tie fixing bolt 18 also provided on the side of the urea tank body 1.

[0030] In one embodiment, the sealing plate 13 has a threaded groove, and the screw 12 passes through the fixing washer 11 and the pressure ring 10 before being threadedly connected to the sealing plate 13. This improves the tightness of the connection between the components at the filling port 7, reduces the risk of seal failure due to loose assembly, and effectively prevents urea leakage.

[0031] In one embodiment, the sealing plate 13 is attached to the pressure ring 10. The sealing plate 13 and the pressure ring 10 are directly attached to each other, eliminating the gap between them and forming a surface contact sealing base to prevent urea from seeping out from the gap between them.

[0032] In one embodiment, the limiting sleeve 9 has a threaded groove, and the bottom of the feed inlet 8 has a threaded connector that is threaded into the threaded groove. This ensures that the feed inlet 8 is installed in a precise position, avoiding poor compatibility of the filling gun due to positional misalignment.

[0033] In one embodiment, a drain nut 14 is connected to the bottom of the urea tank 1. The drain nut 14 has a drain channel, and a drain bolt 15 is threadedly connected to the drain channel. The drain bolt 15 is threadedly engaged with the drain channel. When tightened, it can block the drain channel, and when loosened, it can open the channel to allow urea to drain from the tank.

[0034] In one embodiment, the urea tank 1 is provided with a urea tank precaution label 16 and a urea pipe warning label 17. This allows for a clear display of precautions for using the urea tank and warning information related to the urea pipe.

[0035] In one embodiment, the corners and connections of the urea tank 1 are all transitioned with large rounded corners. The large rounded corners disperse stress, and combined with the preload compensation at each threaded connection, ensure the sealing reliability and mechanical strength of the overall structure during long-term use. The large rounded corner transitions can disperse stress at the corners and connections of the urea tank 1, avoiding stress concentration, and also eliminating sharp edges.

[0036] In one embodiment, the urea tank 1 is made of low-density polyethylene, and the overall color of the urea tank 1 is black. Low-density polyethylene has the characteristics of being resistant to urea corrosion and resistant to high and low temperatures (-40℃ to +80℃). The black color can improve the material's anti-aging properties, while reducing the impact of light penetration on the urea inside the tank.

[0037] In operation, this utility model works as follows: During the installation and fixing stage, the first bracket 4, the second bracket 6, and the cable tie fixing bolt 18 are tightened to the side of the urea tank 1 by screwing in the mounting bolt 5 and under the action of the threads. Multiple fixing constraints are formed by the thread preload, which counteracts the vibration load during vehicle operation and ensures relative position stability. When assembling the filling port 7 assembly, the limiting sleeve 9 is first fixed to the inside of the filling port 7. The bottom threaded connecting seat of the feed port 8 is aligned with the inner thread groove of the limiting sleeve 9 and rotated. Under the action of thread engagement, it moves downward along the axis until it is accurately positioned. After the pressure ring 10 is fitted into the outer wall of the feed port 8, the fixing washer 11 is placed above the pressure ring 10. The screw 12 passes through the fixing washer 11 and the pressure ring 10 and is screwed into the threaded hole of the sealing plate 13 under the action of the threads. As the screw 12 is tightened, the pressure ring 10 is tightly fitted to the sealing plate 13 under the action of axial force, and the initial seal of the filling port 7 is achieved through the contact surface pressure.

[0038] During use, under vehicle vibration conditions, the mounting bolt 5 and the cable tie fixing bolt 18 maintain the rigidity of the bracket connection through thread preload, preventing component displacement caused by tank shaking. During filling, the sealing plate 13 and the pressure ring 10 remain stable under the continuous pressure of the screw 12, preventing leakage during urea filling. When drainage is required, the drain bolt 15 is screwed outward along the drain channel inside the drain nut 14 under the action of the thread. After the channel opens, residual urea is discharged along the channel. After drainage is completed, the drain bolt 15 is tightened in the reverse direction. The axial pressure generated by the thread engagement forms a seal between the bolt and the nut, blocking the drain channel. At the same time, the black low-density polyethylene tank maintains structural stability in environments ranging from -40℃ to +80℃. The large rounded corner design at the corners disperses stress, and the preload compensation at each threaded connection ensures the sealing reliability and mechanical strength of the overall structure during long-term use.

[0039] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A bolt tightening structure for a urea tank, characterized in that: The urea tank includes a urea tank (1), a vent valve (2) is provided on the top of the urea tank (1), a sensor bayonet (3) is provided on the top of the urea tank (1), mounting bolts (5) are provided on the side of the urea tank (1), a first bracket (4) and a second bracket (6) are installed on the side of the urea tank (1) by the mounting bolts (5), a filling port (7) is provided on the urea tank (1), a limiting sleeve (9) is provided inside the filling port (7), a feed port (8) is provided above the limiting sleeve (9), a pressure ring (10) is installed on the outer wall of the feed port (8), a fixing gasket (11) is fitted on the feed port (8), a screw (12) is provided inside the fixing gasket (11), a sealing plate (13) extends from the top edge of the filling port (7) along the axial center direction, and a cable tie fixing bolt (18) is also provided on the side of the urea tank (1).

2. The urea tank bolt re-tightening structure according to claim 1, characterized in that: The sealing plate (13) is provided with a threaded groove, and the screw (12) is threadedly connected to the sealing plate (13) after passing through the fixing washer (11) and the pressure ring (10).

3. The urea tank bolt re-tightening structure according to claim 1, characterized in that: The sealing plate (13) is attached to the pressure ring (10).

4. The urea tank bolt re-tightening structure according to claim 1, characterized in that: The limiting sleeve (9) is provided with a threaded groove, and the bottom of the feed port (8) is provided with a threaded connection seat, which is threadedly connected to the threaded groove.

5. The urea tank bolt re-tightening structure according to claim 1, characterized in that: A drain nut (14) is connected to the bottom of the urea tank (1). A drain channel is provided inside the drain nut (14), and a drain bolt (15) is threadedly connected inside the drain channel.

6. The urea tank bolt re-tightening structure according to claim 1, characterized in that: The urea tank (1) is provided with a urea tank precaution label (16) and a urea tube warning label (17).

7. The urea tank bolt re-tightening structure according to claim 1, characterized in that: The corners and connections of the urea tank (1) are all transitioned with large rounded corners.

8. The urea tank bolt re-tightening structure according to claim 1, characterized in that: The urea tank (1) is made of low-density polyethylene and is black in color.

Images