Flexible connection pump body and mechanical water pump for vehicle

Abstract

The utility model discloses a flexible connection pump body and a vehicle mechanical water pump, the flexible connection pump body comprises a pump shell, a pump seat and a connecting pipe, a first sealing structure capable of preventing water leakage is arranged between the water inlet end of the connecting pipe and the pump shell connecting seat, and a second sealing structure capable of preventing water leakage is arranged between the water outlet end of the connecting pipe and the pump shell connecting seat. By adopting the flexible connection pump body, the pump shell and the pump seat, the flexible connection capable of rotating and axially moving is realized through the connecting pipe, so that the work difference and the deformation of the mounting position can be compensated, the reliable mounting of the pump body on an engine is ensured, the pump shell, the pump seat and the connecting pipe are not deformed, the water leakage problem is avoided, and meanwhile, the service life of the pump body is prolonged. A first sealing structure and a second sealing structure are arranged at the connecting positions of the connecting pipe and the pump shell connecting base and the pump base connecting base correspondingly, and the water leakage problem is further avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a soft-connected pump body and a mechanical water pump for a vehicle. Background Art

[0002] The main function of a car water pump is to pump out the hot water in the engine water channel and pump cold water into the engine water channel, thereby achieving efficient cooling of the engine.

[0003] The pump body of a water pump is usually composed of two parts: the pump housing and the pump seat. At present, since the pump housing and the pump seat are both rigidly connected, and the outer surface of the engine is not only large in area but also very uneven, it is inevitable that there are large or small tolerances in the installation positions of the pump housing and the pump seat. Therefore, in the case of large tolerances, not only is it easy for one of the pump housing and the pump seat to be difficult to install reliably, but also the rigidly connected pump housing and the pump seat may leak at the connection or installation due to slight deformation after installation.

[0004] Solving the above problems has become a top priority. Utility Model Content

[0005] In order to solve the technical problem that the pump body of the existing vehicle water pump is difficult to install and may leak due to deformation when the water pump installation position of the engine has a large tolerance because the pump housing and the pump seat are rigidly connected, the utility model provides a soft-connected pump body and a vehicle mechanical water pump.

[0006] The technical solution is as follows:

[0007] The first aspect of the present application relates to a soft-connected pump body, comprising a pump casing and a pump seat, and also comprising a connecting pipe in a circular tubular structure, wherein a pump casing connecting seat matched with a water inlet end of the connecting pipe is provided at the water outlet of the pump casing, the water inlet end of the connecting pipe can be inserted into the pump casing connecting seat telescopically and rotatably, and a first sealing structure capable of preventing water leakage is provided between the water inlet end of the connecting pipe and the pump casing connecting seat, a pump seat connecting seat matched with a water outlet end of the connecting pipe is provided at the water inlet of the pump seat, the water outlet end of the connecting pipe can be inserted into the pump seat connecting seat telescopically and rotatably, and a second sealing structure capable of preventing water leakage is provided between the water outlet end of the connecting pipe and the pump casing connecting seat.

[0008] By adopting the above-mentioned soft-connected pump body, the pump casing and the pump seat realize a soft connection that can rotate and move axially through the connecting pipe, thereby being able to compensate for the working error and deformation of the installation position, which not only ensures the reliable installation of the pump body on the engine, but also prevents the pump casing, pump seat and connecting pipe from deforming themselves, thus avoiding water leakage problems. At the same time, the connecting pipe is respectively provided with a first sealing structure and a second sealing structure at the connection position with the pump casing connecting seat and the pump seat connecting seat, thus further avoiding water leakage problems.

[0009] In some embodiments, the first sealing structure includes at least one first sealing ring installation groove recessed in the outer peripheral surface of the water inlet end of the connecting pipe, each first sealing ring installation groove is provided with a first annular sealing ring, and each first annular sealing ring is interference fit with the pump casing connecting seat and the corresponding first sealing ring installation groove.

[0010] In some embodiments, the second sealing structure includes at least one second sealing ring installation groove recessed in the outer peripheral surface of the water outlet end of the connecting pipe, each second sealing ring installation groove is provided with a second annular sealing ring, and each second annular sealing ring is interference fit with the pump seat connecting seat and the corresponding second sealing ring installation groove.

[0011] The second aspect of the present application relates to a vehicle mechanical water pump, comprising an impeller shaft, an impeller, a cover plate and the above-mentioned soft-connected pump body, the cover plate can be detachably covered on the pump casing, and together with the pump casing forms an impeller mounting cavity, one end of the impeller shaft is inserted into the impeller mounting cavity and synchronously rotated with the impeller, the water inlet end of the connecting pipe is inserted into the pump casing connecting seat and connected with the impeller mounting cavity, at least one return pipe connected with the impeller mounting cavity is installed on the pump casing, and a pump seat outlet connected with the water outlet end of the connecting pipe is provided on the pump seat.

[0012] By adopting the above-mentioned vehicle mechanical water pump, a detachable cover is provided to facilitate the assembly of internal components such as an impeller. At the same time, by providing one or more return pipes, it can adapt to the situation of multiple return positions.

[0013] In some embodiments, a bearing mounting hole is formed at one end of the pump casing away from the cover plate, and the impeller shaft is mounted in the bearing mounting hole through a bearing, and a flange is synchronously and rotatably mounted on the end of the impeller shaft that passes out of the bearing mounting hole, and a water seal for sealing the gap between the impeller shaft and the bearing mounting hole is mounted on the impeller shaft, and the water seal is located at the end of the bearing mounting hole away from the flange.

[0014] In some embodiments, at least one drainage hole is formed on the pump housing, and one end of each drainage hole is connected to the outside, and the other end is connected to the drainage gap formed between the water seal and the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of a vehicle mechanical water pump;

[0016] Figure 2 It is a bottom view of a vehicle mechanical water pump;

[0017] Figure 3 for Figure 2 Sectional view at AA in the middle;

[0018] Figure 4It is a schematic diagram of the structure of the pump casing;

[0019] Figure 5 It is a structural schematic diagram of the pump seat;

[0020] Figure 6 Schematic diagram of the structure of the connecting pipe. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with embodiments and drawings.

[0022] Embodiment 1:

[0023] like Figure 1-Figure 6 As shown, a soft-connected pump body mainly includes a pump casing 1, a pump seat 2 and a connecting pipe 3.

[0024] Among them, the connecting pipe 3 is a circular tubular structure, and a pump casing connecting seat 1a adapted to the water inlet end of the connecting pipe 3 is provided at the water outlet of the pump casing 1, that is, the pump casing connecting seat 1a is a circular ring structure adapted to the water inlet end of the connecting pipe 3, and the water inlet end of the connecting pipe 3 can be telescopically and rotatably inserted into the pump casing connecting seat 1a. Similarly, a pump seat connecting seat 2a adapted to the water outlet end of the connecting pipe 3 is provided at the water inlet of the pump seat 2, that is, the pump seat connecting seat 2a is a circular ring structure adapted to the water outlet end of the connecting pipe 3, and the water outlet end of the connecting pipe 3 can be telescopically and rotatably inserted into the pump seat connecting seat 2a.

[0025] Therefore, the pump casing 1 and the pump seat 2 are connected in a flexible manner through the connecting pipe 3 so as to be able to rotate and move axially, thereby compensating for the tolerance and deformation of the installation position. That is, when there is a tolerance in the installation position of the water pump on the engine, the relative positions of the pump casing 1 and the pump seat 2 can be adjusted by rotation and telescopic adjustment, thereby ensuring the reliable installation of the pump body on the engine and preventing the pump casing 1, the pump seat 2 and the connecting pipe 3 themselves from being deformed, thereby avoiding water leakage.

[0026] Furthermore, a first sealing structure capable of preventing water leakage is provided between the water inlet end of the connecting pipe 3 and the pump casing connecting seat 1a. Similarly, a second sealing structure capable of preventing water leakage is provided between the water outlet end of the connecting pipe 3 and the pump casing connecting seat 1a.

[0027] Therefore, the connection pipe 3 is provided with a first sealing structure and a second sealing structure at the connection positions with the pump housing connection seat 1a and the pump seat connection seat 2a, respectively, so that the water leakage problem can be completely avoided.

[0028] See also Figure 3-Figure 6The first sealing structure includes at least one first sealing ring installation groove 3a formed in the outer peripheral surface of the water inlet end of the connecting pipe 3, each first sealing ring installation groove 3a is provided with a first annular sealing ring 4, and each first annular sealing ring 4 is interference fit with the pump housing connection seat 1a and the corresponding first sealing ring installation groove 3a. Therefore, by providing the first sealing ring installation groove 3a, the reliable installation of the first annular sealing ring 4 can be guaranteed, and by providing the first annular sealing ring 4, the gap between the pump housing connection seat 1a and the connecting pipe 3 can be reliably sealed to prevent the hidden danger of water leakage.

[0029] See also Figure 3-Figure 6 The second sealing structure includes at least one second sealing ring installation groove 3b formed in the outer peripheral surface of the water outlet end of the connecting pipe 3, each second sealing ring installation groove 3b is provided with a second annular sealing ring 5, and each second annular sealing ring 5 is interference fit with the pump seat connecting seat 2a and the corresponding second sealing ring installation groove 3b. Therefore, by providing the second sealing ring installation groove 3b, the reliable installation of the second annular sealing ring 5 can be guaranteed, and by providing the second annular sealing ring 5, the gap between the pump seat connecting seat 2a and the connecting pipe 3 can be reliably sealed to prevent the hidden danger of water leakage.

[0030] In this embodiment, the first annular sealing ring 4 and the second annular sealing ring 5 are both made of fluororubber or silicone rubber or tetrafluoroethylene, which have excellent high temperature resistance, good corrosion resistance and durability.

[0031] In this embodiment, the first annular sealing ring 4 and the second annular sealing ring 5 are determined according to actual needs. As long as the quality and performance of the first annular sealing ring 4 and the second annular sealing ring 5 are excellent, it is preferred to set only one of the first annular sealing ring 4 and the second annular sealing ring 5, which is convenient for installation and adjustment and can reduce costs.

[0032] Furthermore, the outer edges of both ends of the connecting pipe 3 are chamfered to facilitate insertion into the pump casing connecting seat 1a and the pump seat connecting seat 2a, thereby reducing assembly difficulty and improving assembly efficiency.

[0033] Correspondingly, the inner edges of the outer ends of the pump casing connecting seat 1a and the pump seat connecting seat 2a are also chamfered to facilitate the insertion of the connecting pipe 3, reduce the difficulty of assembly, and improve the assembly efficiency.

[0034] Embodiment 2:

[0035] See also Figure 1-Figure 6 , a vehicle mechanical water pump, comprising an impeller shaft 6, an impeller 7, a cover plate 8 and a soft-connected pump body of embodiment 1.

[0036] The cover plate 8 can be detachably covered on the pump housing 1, and together with the pump housing 1, an impeller installation cavity 9 is formed. By providing a detachable cover plate 8, it is convenient to assemble internal components such as the impeller 7. In this embodiment, the cover plate 8 is locked on the pump housing 1 by multiple screws, which is simple and reliable.

[0037] One end of the impeller shaft 6 is inserted into the impeller mounting cavity 9 and then the impeller 7 is synchronously rotated. The water inlet end of the connecting pipe 3 is inserted into the pump casing connecting seat 1a and communicated with the impeller mounting cavity 9. At least one return pipe 10 connected with the impeller mounting cavity 9 is installed on the pump casing 1, and a pump seat outlet 2b connected with the water outlet end of the connecting pipe 3 is provided on the pump seat 2. Through the rotation of the impeller 7, the water transported to the impeller mounting cavity 9 by the return pipe 10 can be transported to the pump seat 2 through the connecting pipe 3, and finally output from the pump seat outlet 2b. This embodiment can adapt to the situation of multiple return water positions by setting one or more return water pipes 10, such as the return water of the cylinder body, cylinder head and other positions of the engine. Usually, the amount of cooling water in the cylinder body is the largest, so the return water pipe 10 with the largest pipe diameter is usually connected to the cylinder body.

[0038] See also Figure 3 A bearing mounting hole 1b is provided at one end of the pump housing 1 away from the cover plate 8, and the impeller shaft 6 is installed in the bearing mounting hole 1b through a bearing 11. A flange 12 is synchronously rotatedly installed at one end of the impeller shaft 6 that passes out of the bearing mounting hole 1b. A water seal 13 for sealing the gap between the impeller shaft 6 and the bearing mounting hole 1b is mounted on the impeller shaft 6. The water seal 13 is located at one end of the bearing mounting hole 1b away from the flange 12. The above design ensures reliable installation of the impeller shaft 6, and at the same time, by providing the water seal 13, the risk of cooling water in the impeller mounting cavity 9 leaking from the bearing mounting hole 1b can be reduced.

[0039] Since the water seal 13 may leak after long-term use, please refer to Figure 1 , Figure 3 and Figure 4 At least one drainage hole 1c is provided on the pump housing 1, one end of each drainage hole 1c is connected to the outside, and the other end is connected to the drainage gap 1b1 formed between the water seal 13 and the bearing 11. By providing the drainage hole 1c and the drainage gap 1b1, the seepage water in the drainage gap 1b1 can be effectively discharged, the corrosion of the bearing 11 by the cooling water can be reduced, the durability of the bearing 11 can be improved, and the influence of the seepage water on the front end gear train of the engine can also be reduced.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make a variety of similar expressions without violating the purpose and claims of the present invention, and such changes fall within the scope of protection of the present invention.

Claims

1. A soft-connected pump body, comprising a pump housing (1) and a pump seat (2), characterized in that: It also comprises a connecting pipe (3) of a circular tubular structure, a pump casing connecting seat (1a) adapted to the water inlet end of the connecting pipe (3) being provided at the water outlet of the pump casing (1), the water inlet end of the connecting pipe (3) being capable of being inserted into the pump casing connecting seat (1a) in a telescopic and rotatable manner, and a first sealing structure capable of preventing water leakage being provided between the water inlet end of the connecting pipe (3) and the pump casing connecting seat (1a), and a pump seat connecting seat (2a) adapted to the water outlet end of the connecting pipe (3) being provided at the water inlet of the pump seat (2), the water outlet end of the connecting pipe (3) being capable of being inserted into the pump seat connecting seat (2a) in a telescopic and rotatable manner, and a second sealing structure capable of preventing water leakage being provided between the water outlet end of the connecting pipe (3) and the pump casing connecting seat (1a).

2. The soft connection pump body according to claim 1, characterized in that: The first sealing structure comprises at least one first sealing ring installation groove (3a) formed in a depression on the outer peripheral surface of the water inlet end of the connecting pipe (3), each first sealing ring installation groove (3a) is provided with a first annular sealing ring (4), and each first annular sealing ring (4) is interference-fitted with the pump casing connecting seat (1a) and the corresponding first sealing ring installation groove (3a).

3. The soft connection pump body according to claim 1, characterized in that: The second sealing structure comprises at least one second sealing ring installation groove (3b) formed in a recess on the outer peripheral surface of the water outlet end of the connecting pipe (3), each second sealing ring installation groove (3b) being provided with a second annular sealing ring (5), each second annular sealing ring (5) being interference fit with the pump seat connecting seat (2a) and the corresponding second sealing ring installation groove (3b).

4. A mechanical water pump for a vehicle, characterized in that: The invention comprises an impeller shaft (6), an impeller (7), a cover plate (8) and a soft-connected pump body according to any one of claims 1 to 3, wherein the cover plate (8) can be detachably covered on the pump casing (1) and enclosed with the pump casing (1) to form an impeller mounting cavity (9), one end of the impeller shaft (6) is inserted into the impeller mounting cavity (9) and is synchronously rotated with the impeller (7), the water inlet end of the connecting pipe (3) is inserted into the pump casing connecting seat (1a) and is connected to the impeller mounting cavity (9), at least one return pipe (10) connected to the impeller mounting cavity (9) is installed on the pump casing (1), and a pump seat water outlet (2b) connected to the water outlet end of the connecting pipe (3) is provided on the pump seat (2).

5. The vehicle mechanical water pump according to claim 4, characterized in that: A bearing mounting hole (1b) is provided at one end of the pump housing (1) away from the cover plate (8); the impeller shaft (6) is mounted in the bearing mounting hole (1b) via a bearing (11); a flange (12) is synchronously and rotatably mounted on one end of the impeller shaft (6) that passes out of the bearing mounting hole (1b); a water seal (13) for sealing a gap between the impeller shaft (6) and the bearing mounting hole (1b) is sleeved on the impeller shaft (6); the water seal (13) is located at one end of the bearing mounting hole (1b) away from the flange (12).

6. The vehicle mechanical water pump according to claim 5, characterized in that: The pump housing (1) is provided with at least one drainage hole (1c), one end of each drainage hole (1c) is connected to the outside, and the other end is connected to a drainage gap (1b1) formed between the water seal (13) and the bearing (11).

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