Mute direct-current water pump

Abstract

The mute direct-current water pump comprises a connecting shaft, a pump body and a shielding sleeve, damping assemblies are arranged between the connecting shaft and the pump body and between the connecting shaft and the shielding sleeve, the damping assemblies are used for reducing vibration conduction between the connecting shaft and the shielding sleeve and between the connecting shaft and the pump body, and each damping assembly comprises a first damping part and a second damping part; the first damping piece is used for reducing vibration conduction between the connecting shaft and the shielding sleeve, and the first damping piece and the second damping piece are matched to be used for reducing vibration conduction between the connecting shaft and the pump body. The water pump has the advantages that vibration during operation of the water pump is reduced by reducing high-frequency vibration conduction between the connecting shaft and the shielding sleeve as well as between the connecting shaft and the pump body, so that the water pump operates more stably, noise of the whole machine during combined operation of the water pump is reduced, and interference to the outside is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of water pump vibration reduction, and in particular to a silent DC water pump. Background Art

[0002] When the water pump is running, the high-speed rotating impeller and shaft generate high-frequency vibration due to friction. The high-frequency vibration causes the water pump noise to increase, affecting the stability of the water pump operation. When the water pump is installed on a gas water heater, it will also cause the whole machine to make a lot of noise, causing greater interference to the outside world when the water pump is running. Utility Model Content

[0003] In response to the shortcomings of the existing technology, one of the purposes of this application is to provide a silent DC water pump, which has the advantage of reducing the vibration during the operation of the water pump by reducing the high-frequency vibration conduction between the shaft, the shielding sleeve and the pump body, making the operation of the water pump more stable and reducing the noise of the entire machine when the water pump is operated in conjunction, thereby reducing the interference caused to the outside world.

[0004] The above-mentioned purpose of this application is achieved through the following technical solutions:

[0005] A silent DC water pump includes a connecting shaft, a pump body and a shielding sleeve. A shock-absorbing assembly is provided between the connecting shaft, the pump body and the shielding sleeve. The shock-absorbing assembly is used to reduce vibration transmission between the connecting shaft, the shielding sleeve and the pump body. The shock-absorbing assembly includes a first shock-absorbing member and a second shock-absorbing member. The first shock-absorbing member is used to reduce vibration transmission between the connecting shaft and the shielding sleeve. The first shock-absorbing member and the second shock-absorbing member cooperate to reduce vibration transmission between the connecting shaft and the pump body.

[0006] By adopting the above technical solution, shock absorber 1 reduces the vibration transmission between the connecting shaft and the shielding sleeve, and shock absorber 1 and shock absorber 2 cooperate to reduce the vibration transmission between the connecting shaft and the pump body, thereby reducing the vibration during the operation of the water pump, making the pump operation more stable and reducing the noise of the entire machine when the water pump is operated in conjunction, thereby reducing interference to the outside world.

[0007] In a preferred example, the present application can be further configured as follows: a receiving cavity is provided on the shock absorbing component, and the receiving cavity is used to receive a connecting shaft or a bearing.

[0008] In a preferred example, the present application can be further configured as follows: the fitting clearance between the accommodating cavity and the connecting shaft or bearing is -0.1mm to -0.5mm.

[0009] By adopting the above technical solution, the fit between the accommodating cavity and the connecting shaft or the bearing is made tighter.

[0010] In a preferred example, the present application can be further configured as follows: the second shock-absorbing member is provided with a through hole for the connecting shaft to pass through.

[0011] In a preferred example, the present application can be further configured as follows: two groups of shock absorbers are provided, and both groups of shock absorbers are provided with a limiting surface 1, which is used to limit the position between the connecting shaft and the shock absorber 1; one group of shock absorbers is also provided with a limiting surface 2, which is used to limit the position between the shock absorber 1 and the shielding sleeve.

[0012] By adopting the above technical solution, the limiting surface 1 reduces the probability of rotation of the shock absorbing member 1 and the connecting shaft, and the limiting surface 2 reduces the probability of rotation of the shock absorbing member 1 and the shielding sleeve.

[0013] In a preferred example, the present application can be further configured as follows: a limiting protrusion is provided on the accommodating cavity, the limiting protrusion is used to limit the position of the shock absorber on the connecting shaft, and the distance between the limiting protrusion and the end face of the connecting shaft is less than the distance between the limiting protrusion and the bottom of the shock absorber cavity.

[0014] By adopting the above technical solution, the limiting protrusion limits the position of the shock absorber 1 on the connecting shaft, so that the shock absorber 1 is firmly connected to the connecting shaft, and the distance between the limiting protrusion and the end face of the connecting shaft is smaller than the distance between the limiting protrusion and the bottom of the shock absorber cavity, so that the bottom of the shock absorber cavity and the end face of the connecting shaft conflict with each other, and the end face of the connecting shaft refers to the bottom of the shock absorber cavity and the contact end.

[0015] In a preferred example, the present application can be further configured as follows: a shock-absorbing cavity is provided on the shock-absorbing assembly, and the shock-absorbing cavity is used to hinder the transmission of vibration between the connecting shaft, the shielding sleeve and the pump body.

[0016] By adopting the above technical solution, the shock-absorbing cavity blocks the transmission of vibration, reduces the vibration between the connecting shaft, the shielding sleeve and the pump body, and makes the shock-absorbing effect of the shock-absorbing assembly better.

[0017] In a preferred example, the present application can be further configured as follows: a shock-absorbing strip is provided on the shock-absorbing assembly, the shock-absorbing strip forms a shock-absorbing cavity, and peaks and troughs are provided on both sides of the shock-absorbing strip, and the peaks and troughs cooperate to hinder the conduction of vibration.

[0018] By adopting the above technical solution, the vibration on the connecting shaft is transmitted along the shock-absorbing strip, so that the wave crest is squeezed toward the wave trough, so that the shock-absorbing strip is squeezed, and then the vibration is offset by the shock-absorbing strip, so that the shock-absorbing cavity has a barrier effect on the vibration.

[0019] In a preferred example, the present application can be further configured as follows: the size of the wave crests and wave troughs decreases toward the side close to the connecting axis.

[0020] By adopting the above technical solution, the vibration transmission path is extended.

[0021] In a preferred example, the present application can be further configured as follows: a guide surface and a contact surface are provided on the shock-absorbing strip, the guide surface is used to guide the connecting shaft or bearing into the shock-absorbing cavity, and the contact surface is used to conflict with the connecting shaft or bearing.

[0022] By adopting the above technical solution, the guide surface makes it easier for the connecting shaft or bearing to enter the shock-absorbing cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application.

[0024] Figure 2 It is a schematic diagram of the structure of the shock absorbing component of this application.

[0025] Figure 3 It is a schematic diagram of the shock-absorbing cavity structure of other embodiments of the present application.

[0026] Figure 4 This is a schematic structural diagram of the shock-absorbing cavity from another perspective of other embodiments of the present application.

[0027] Figure numerals: 1. connecting shaft; 2. pump body; 3. shielding sleeve; 4. bearing; 5. accommodating chamber; 6. shock-absorbing member 1; 61. limiting surface 1; 62. limiting surface 2; 7. shock-absorbing member 2; 71. through hole; 8. shock-absorbing chamber; 9. shock-absorbing strip; 91. crest; 92. trough; 93. guide surface; 94. contact surface; 10. limiting protrusion. DETAILED DESCRIPTION

[0028] The present application is further described in detail below with reference to the accompanying drawings.

[0029] Reference Figure 1 and Figure 2 , is a silent DC water pump disclosed in the present application, comprising a connecting shaft 1, a pump body 2 and a shielding sleeve 3, the pump body 2 and the shielding sleeve 3 are sealed and connected by a sealing member, a shock-absorbing assembly is provided between the connecting shaft 1 and the pump body 2 and the shielding sleeve 3, the shock-absorbing assembly is used to reduce the vibration transmission between the connecting shaft 1 and the shielding sleeve 3 and the pump body 2, the shock-absorbing assembly comprises a shock-absorbing member 1 6 and a shock-absorbing member 2 7, the shock-absorbing member 1 6 is used to reduce the vibration transmission between the connecting shaft 1 and the shielding sleeve 3, the shock-absorbing member 1 6 and the shock-absorbing member 2 7 cooperate to reduce the vibration transmission between the connecting shaft 1 and the pump body 2, the shock-absorbing member 1 6 is provided with two groups, both groups of shock-absorbing members 6 are provided with a limiting surface 1 61, the limiting surface 1 61 is used to limit the position between the connecting shaft 1 and the shock-absorbing member 1 6, one group of shock-absorbing members 1 6 is also provided with a limiting surface 2 62, the limiting surface 2 62 is used to limit the position between the shock-absorbing member 1 6 and the shielding sleeve 3.

[0030] The shock-absorbing assembly is provided with a accommodating cavity 5, and the fitting clearance between the accommodating cavity 5 and the connecting shaft 1 or the bearing 4 is -0.1mm to -0.5mm. In this embodiment, the fitting clearance between the accommodating cavity 5 and the connecting shaft 1 or the bearing 4 can be -0.2mm, -0.3mm or -0.5mm. The shock-absorbing member 1 6 is provided with no less than two groups, and the accommodating cavity 5 is respectively provided on the shock-absorbing member 1 6 and the shock-absorbing member 2 7. The accommodating cavity 5 on the shock-absorbing member 1 6 is used to accommodate the connecting shaft 1, and the accommodating cavity 5 on the shock-absorbing member 2 7 is used to accommodate the bearing 4. The shock-absorbing member 2 7 is provided with a through hole 71 for the connecting shaft 1 to pass through the through hole 71. In this embodiment, the material of the shock-absorbing member 1 6 and the shock-absorbing member 2 7 can be rubber, silicone or other materials with shock-absorbing effect.

[0031] During installation, the shock absorber 2 7 is installed on the connecting shaft 1 through the through hole 71, so that the bearing 4 on the connecting shaft 1 is located in the accommodating cavity 5 of the shock absorber 2 7, and the two ends of the connecting shaft 1 extend into the accommodating cavity 5 of the shock absorber 1 6. One end of the connecting shaft 1 is connected to the shielding sleeve 3 through one group of shock absorbers 1 6, and the other end is connected to the pump body 2 through another group of shock absorbers 1 6. When the water pump is running, the shock absorber 1 6 connected to the shielding sleeve 3 reduces the vibration transmission between the connecting shaft 1 and the shielding sleeve 3, and the shock absorber 1 6 connected to the pump body 2 cooperates with the shock absorber 2 7 to reduce the vibration transmission between the connecting shaft 1 and the bearing 4 and the pump body 2, thereby reducing the vibration caused by the operation of the water pump.

[0032] Reference Figure 3 and Figure 4 In another embodiment, a shock-absorbing cavity 8 and a shock-absorbing strip 9 are provided on the shock-absorbing assembly. The shock-absorbing cavity 8 is communicated with the accommodating cavity 5. The shock-absorbing cavity 8 is used to hinder the transmission of vibration between the connecting shaft 1, the shielding sleeve 3 and the pump body 2. The shock-absorbing strip 9 forms the shock-absorbing cavity 8. The shock-absorbing strip 9 is provided with crests 91 and troughs 92 on both sides of the shock-absorbing strip 9. The crests 91 and the troughs 92 cooperate to hinder the transmission of vibration. A guide surface 93 and a contact surface 94 are provided on the shock-absorbing strip 9. The guide surface 93 is used to guide the connecting shaft 1 or the bearing 4 into the shock-absorbing cavity 8, and the contact surface 94 is used to conflict with the connecting shaft 1 or the bearing 4. In this embodiment, the shock-absorbing strip 9 is arranged horizontally on the shock-absorbing assembly. In other embodiments, the shock-absorbing strip 9 can be arranged vertically or staggered horizontally and vertically on the shock-absorbing assembly. The guide surface 93 is set as an inclined plane, and the inclination angle can be 30 to 45 degrees.

[0033] A limiting protrusion 10 is provided on the accommodating cavity 5, and a groove is provided on the connecting shaft 1. The groove and the limiting protrusion 10 cooperate to limit the position of the shock absorber 6 on the connecting shaft 1. The distance between the limiting protrusion 10 and the end face of the connecting shaft 1 is smaller than the distance between the limiting protrusion 10 and the bottom of the shock absorber cavity 8. The sizes of the wave crests 91 and the wave troughs 92 decrease toward the side close to the connecting shaft 1.

[0034] The limiting protrusion 10 limits the position of the shock-absorbing member 6 on the connecting shaft 1, so that the shock-absorbing member 6 is firmly connected to the connecting shaft 1, and the bottom of the shock-absorbing cavity 8 and the end face of the connecting shaft 1 are in conflict, so that the end face of the connecting shaft 1 or the bearing 4 is in conflict with the shock-absorbing strip 9. The connecting shaft 1 or the bearing 4 contacts the shock-absorbing strip 9 through the guide surface 93 and the contact surface 94, so that when the water pump is running, the shock-absorbing strip 9 hinders the transmission of vibration, reduces the vibration between the connecting shaft 1 and the shielding sleeve 3 and the pump body 2, and makes the shock-absorbing effect of the shock-absorbing assembly better.

[0035] The implementation principle of this embodiment is: shock absorber 1 6 reduces the vibration transmission between the connecting shaft 1 and the shielding sleeve 3, and shock absorber 1 6 and shock absorber 2 7 cooperate to reduce the vibration transmission between the connecting shaft 1 and the pump body 2, thereby reducing the vibration during the operation of the water pump, making the pump operation more stable and reducing the noise of the entire machine when the water pump is operated in combination, thereby reducing interference to the outside world.

[0036] The embodiments of this specific implementation method are all preferred embodiments of the present application and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A silent DC water pump, characterized by: The invention comprises a connecting shaft (1), a pump body (2) and a shielding sleeve (3); a shock-absorbing assembly is provided between the connecting shaft (1), the pump body (2) and the shielding sleeve (3); the shock-absorbing assembly is used to reduce vibration transmission between the connecting shaft (1), the shielding sleeve (3) and the pump body (2); the shock-absorbing assembly comprises a first shock-absorbing member (6) and a second shock-absorbing member (7); the first shock-absorbing member (6) is used to reduce vibration transmission between the connecting shaft (1) and the shielding sleeve (3); the first shock-absorbing member (6) and the second shock-absorbing member (7) cooperate to reduce vibration transmission between the connecting shaft (1) and the pump body (2).

2. A silent DC water pump according to claim 1, characterized in that: The shock-absorbing component is provided with an accommodating cavity (5), and the accommodating cavity (5) is used to accommodate the connecting shaft (1) or the bearing (4).

3. A silent DC water pump according to claim 2, characterized in that: The fitting clearance between the accommodating cavity (5) and the connecting shaft (1) or the bearing (4) is -0.1 mm to -0.5 mm.

4. A silent DC water pump according to claim 1, characterized in that: The second shock-absorbing member (7) is provided with a through hole (71), and the through hole (71) allows the connecting shaft (1) to pass through.

5. The silent DC water pump according to claim 1, characterized in that: Two groups of shock absorbing members (6) are provided. Both groups of shock absorbing members (6) are provided with a limiting surface (61). The limiting surface (61) is used to limit the position between the connecting shaft (1) and the shock absorbing member (6). One group of shock absorbing members (6) is also provided with a limiting surface (62). The limiting surface (62) is used to limit the position between the shock absorbing member (6) and the shielding sleeve (3).

6. A silent DC water pump according to claim 2, characterized in that: A limiting protrusion (10) is provided on the accommodating cavity (5), and the limiting protrusion (10) is used to limit the position of the shock absorbing member (6) on the connecting shaft (1). The distance between the limiting protrusion (10) and the end face of the connecting shaft (1) is smaller than the distance between the limiting protrusion (10) and the bottom of the shock absorbing cavity (8).

7. The silent DC water pump according to claim 1, characterized in that: A shock absorbing chamber (8) is provided on the shock absorbing assembly, and the shock absorbing chamber (8) is used to hinder the transmission of vibration between the connecting shaft (1), the shielding sleeve (3) and the pump body (2).

8. A silent DC water pump according to claim 7, characterized in that: A shock absorbing strip (9) is provided on the shock absorbing assembly, and the shock absorbing strip (9) forms a shock absorbing cavity (8). Wave crests (91) and wave troughs (92) are provided on both sides of the shock absorbing strip (9), and the wave crests (91) and wave troughs (92) cooperate to hinder the conduction of vibration.

9. A silent DC water pump according to claim 8, characterized in that: The magnitude of the fluctuations of the wave crest (91) and the wave trough (92) decreases gradually toward the side close to the connecting axis (1).

10. The silent DC water pump according to claim 8, characterized in that: The shock-absorbing strip (9) is provided with a guide surface (93) and a contact surface (94). The guide surface (93) is used to guide the connecting shaft (1) or the bearing (4) into the shock-absorbing cavity (8), and the contact surface (94) is used to contact the connecting shaft (1) or the bearing (4).

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