Mistake-proof combined structure of high-flow urea pump

Abstract

The utility model discloses a high-flow urea pump mistake-proofing combined structure which comprises a urea tank and a urea pump, the urea pump is installed on the urea tank through a chuck, the urea tank is provided with a tooth-shaped ring matched with the chuck, an assembly hole is formed in the middle of the tooth-shaped ring, and the assembly hole is matched with the chuck. A plurality of flanges extending in the radial direction are arranged on the side, close to the circle center, of the tooth-shaped ring at intervals, a plurality of buckles corresponding to the flanges in position are arranged on the periphery of the chuck, the chuck is limited by the flanges by rotating the chuck, and limiting ribs facing the interior of the urea tank are arranged at one ends of the flanges. And the chuck can only rotate clockwise or anticlockwise until the buckle and the flange coincide in the vertical direction. The device has the advantages of being convenient to disassemble and assemble, capable of preventing a large-flow ontank urea pump and a common-flow ontank urea pump from being assembled in a mixed mode and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to urea technology field especially big flow urea pump mistake proofing combination structure. BACKGROUND

[0002] The urea pump is not an independent component when applied to a vehicle, and needs to be assembled with a urea tank to be used, and is collectively referred to as a urea pump tank assembly. At present, when the tank bottom urea pump and the urea tank are assembled, a chuck is almost always used for installation, the urea tank bottom end is embedded with a buckle, and the chuck is installed between the urea pump installation surface and the urea tank buckle to play a fastening role.

[0003] As disclosed in the existing patent document CN217571700U, the tank bottom urea pump tank assembly assembly device uses a cylinder to push for installation. When installing, the upper support is gently pushed upward. After the upper support is obliquely raised under the action of the hydraulic support rod, the urea pump tank assembly is placed into the fixed support. Then, the upper support is placed down to be flush with the fixed support. The chuck sleeve is aligned with each buckle of the chuck. The purpose is to make it exert force uniformly. The entire installation process can be completed by one operator within 30 seconds for the installation of one set of urea pump tank assembly. This speeds up the production rhythm while ensuring the sealing of the urea pump and the safety of the personnel.

[0004] The patent document CN212376726U discloses a urea solution supply device and a vehicle SCR system. A chuck is installed on the housing, and the housing is fixed to the bottom of the urea tank body through the chuck.

[0005] The patent document CN212454586U discloses a detachable new urea tank. The urea pump and the urea tank housing are connected through a chuck, a sealing ring, and a toothed ring. Under the premise of ensuring sealing and reliability, the detachable function is achieved. The chuck and the toothed ring in the patent document CN212454586U do not have a limiting structure, which is easy to misassemble, for example, a large flow on tank urea pump is mistakenly installed on a vehicle matching a normal flow on tank urea pump.

[0006] At present, most of the chuck assembly methods of the urea tank and the urea pump use two people to use the chuck sleeve to push the chuck into force or use the direct knocking method. When assembling, the vehicle customer of the machine whole plant mistakenly installs a large flow on tank urea pump on a vehicle with a normal flow on tank urea pump, which causes problems in the use process.

[0007] The disclosure of the above background technology content is only used to assist in understanding the concept and technical scheme of the utility model. It does not necessarily belong to the prior art of the present patent application. In the absence of explicit evidence that the above content has been disclosed on the filing date of the present patent application, the above background technology should not be used to evaluate the novelty and inventiveness of the present application. UTILITY MODEL CONTENT

[0008] The utility model mainly aims at providing a large flow urea pump mistake proofing combination structure which is convenient to disassemble and assemble and can prevent large flow on tank urea pump and common flow on tank urea pump from being mixed and assembled.

[0009] Therefore, the utility model provides a large flow urea pump mistake proofing combination structure.

[0010] Preferably, the utility model can also have the following technical features:

[0011] The large flow urea pump mistake proofing combination structure comprises a urea tank and a urea pump, the urea pump is installed on the urea tank through a chuck, wherein the urea tank is provided with a toothed ring matched with the chuck, the middle part of the toothed ring is provided with an assembly hole, a plurality of radially extending flanges are arranged at the side close to the center of the toothed ring at intervals, a plurality of buckles corresponding to the positions of the flanges are arranged around the chuck, the flanges are limited to the chuck by rotating the chuck, one end of the flange is provided with a limiting rib towards the inside of the urea tank, so that the chuck can only be rotated clockwise or counterclockwise to the buckles and the flanges coincide in the vertical direction.

[0012] Further, the buckle is integrated on the outside of the chuck and extends in the axial direction of the chuck.

[0013] Further, the buckle is an arc-shaped sheet body.

[0014] Further, 6-8 flanges are arranged and the same number of buckles are arranged correspondingly.

[0015] Further, the spacing between two adjacent flanges is greater than the width of the buckle.

[0016] Further, the chuck is fixed on the urea pump through the buckle.

[0017] Further, a radial perforation is formed in the middle part of the buckle, and the shell of the urea pump is provided with a limiting block matched with the perforation.

[0018] The beneficial effects of the utility model compared with the prior art include that one end of the flange is provided with a limiting rib towards the inside of the urea tank, so that the chuck can only be rotated clockwise or counterclockwise to the buckles and the flanges coincide in the vertical direction, improving the assembly of the chuck and also achieving the mistake proofing effect. The chuck is detachably assembled on the shell, which is convenient to disassemble and simple to install. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the structural schematic diagram of the utility model.

[0020] Figure 2It is chuck and gear ring rotation allocation schematic diagram of the utility model.

[0021] Figure 3 It is urea tank local view of the utility model.

[0022] Figure 4 It is chuck perspective view of the utility model.

[0023] Figure 5 It is gear ring perspective view of the utility model. DETAILED DESCRIPTION

[0024] The utility model will be explained further in detail in combination with specific implementation manners and by referring to the drawings.It should be emphasized that the following explanation is only exemplary and is not intended to limit the scope of the utility model and its application.

[0025] With reference to the following drawings, non-limiting and non-exclusive embodiments will be described, in which the same reference numerals indicate the same parts, unless otherwise specifically indicated.

[0026] As Figures 1-5 shown in the large flow urea pump mistake proofing combination structure, including urea tank 1 and urea pump 4, the urea pump 4 is installed on the urea tank 1 through chuck 3, the urea tank 1 is equipped with the gear ring 5 of cooperation chuck 3, the middle part of gear ring 5 is equipped with the assembly hole 8, and the gear ring 5 is arranged with several radially extending flanges 6 close to the circumcenter side, and the improvement is that the chuck 3 is clamped and fixed on the urea pump through buckle 32, the periphery of chuck 3 is equipped with several buckles 32 corresponding to the flange 6, the buckle 32 is integrated on the outside of chuck 3 and extends along the axial direction of chuck 3, and the middle part is provided with radial perforation 33;The shell 2 of the urea pump 4 is equipped with the limiting block 21 matched with the perforation 33.When installing chuck 3, the positions of perforation 33 and limiting block 21 are aligned, then chuck 3 is pressed to shell 2 with force, limiting block 21 is clamped into the perforation 33, and then chuck 3 is fixed on shell 2.The one end of the flange 6 is equipped with the limiting rib 7 towards the inside of the urea tank 1, so that chuck 3 can only rotate clockwise or counterclockwise to the buckle 32 and the flange 6 coincide in the vertical direction, improve the assembly of chuck 3, and also can play the effect of mistake proofing.

[0027] In combination Figure 4 with Figure 5 , there are 6-8 flanges 6, preferably 6 or 8 flanges 6, and the same number of buckles 32 are correspondingly provided.The spacing between adjacent two flanges 6 is greater than the width of the buckle 32, so that the buckle 32 can pass through the gap between the two flanges 6.

[0028] When in use, the sealing ring is installed between the joint surface of the urea pump 4 and the urea tank 1, the chuck 3 is installed to the urea pump 4, the chuck 3 is installed into the urea tank 1 from the gap between the flanges 6, a certain downward pressure is applied to the urea pump shell 2 to compress the sealing ring, the urea pump shell 2 is rotated clockwise / counter-clockwise according to the arrangement position of the limiting ribs 7, the buckle 32 is turned to below the flanges 6, and the buckle 32 and the flanges 6 are overlapped.

[0029] Referring to Figure 2 After the urea pump 4 is installed into the urea tank 1, the chuck 3 can only be rotated to the position that the buckle 32 and the flanges 6 are overlapped in one direction due to the limiting effect of the limiting ribs 7. For example, the chuck 3 is installed into the urea tank 1 from the gap between the flanges 6 as the starting position, when the chuck 3 is rotated clockwise from the starting position by a certain angle, the chuck 3 is blocked by the limiting ribs 7, at this time, the buckle 32 and the flanges 6 are overlapped; then, when the chuck 3 is rotated counterclockwise from the starting position, the chuck 3 will abut against the limiting ribs 7, so that the buckle 32 cannot be turned to the position that the buckle 32 and the flanges 6 are overlapped.

[0030] Those skilled in the art will recognize that numerous modifications can be made to the above description while still falling within the scope of the present application, and that the embodiments and drawings are only used to describe one or more specific embodiments.

[0031] While the present application has been described and illustrated with respect to the exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details can be made therein without departing from the spirit of the present application. Further, it will be understood that many modifications can be made to adapt a particular situation or material to the teachings of the present application without departing from the central concept of the present application. Therefore, the present application is not limited to the particular embodiments disclosed in this description, but it covers all modifications which come within the scope of the application as claimed.

Claims

1. A mistake-proofing combined structure of a high-flow urea pump, comprising a urea tank and a urea pump, the urea pump being installed on the urea tank by a chuck, wherein, The urea tank is provided with a toothed ring matched with the chuck, a middle part of the toothed ring is provided with an assembly hole, a plurality of radially extending flanges are arranged at intervals near the circumcenter side of the toothed ring, a periphery of the chuck is provided with a plurality of buckles corresponding to positions of the flanges, characterized in that one end of the flange is provided with a limiting rib facing the interior of the urea tank, so that the chuck can only be rotated clockwise or counterclockwise to the buckles and the flanges to be overlapped in the vertical direction.

2. The mistake-proofing combination structure for a high-flow urea pump according to claim 1, characterized in that: The buckle is integrated on the outside of the chuck and extends along the axial direction of the chuck.

3. The mistake-proofing combination structure for a high-flow urea pump according to claim 2, characterized in that: The buckle is an arc-shaped sheet body.

4. The mistake-proofing combination structure of a high-flow urea pump according to claim 2, wherein: There are 6-8 flanges and the same number of buckles are correspondingly provided.

5. The mistake-proofing combination structure for a high-flow urea pump according to claim 1 or 2, characterized in that: The interval between two adjacent flanges is greater than the width of the buckle.

6. The mistake-proofing combination structure for a high-flow urea pump according to claim 1, wherein: The chuck is fixed on the urea pump through the buckle clamping.

7. The mistake-proofing combination structure for a high-flow urea pump according to claim 6, characterized in that: A middle part of the buckle is provided with a radial perforation, and the shell of the urea pump is provided with a limiting block matched with the perforation.

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