A water pump assembly and oral irrigator

Abstract

The application relates to a water pump assembly and a water pick, the water pump assembly comprising: a diaphragm pump comprising a pump shell and a pump diaphragm; a planetary gear set comprising a ring gear, a planet carrier, planet gears and a sun gear, one end of the ring gear being provided with a connecting portion, the connecting portion being connected with the pump shell, a sliding hole being arranged in the inside of the connecting portion; the planet carrier being provided with a shaft, the outer wall of the shaft being provided with a spiral groove which is closed at both ends; a sliding member arranged in the sliding hole and performing linear reciprocating motion, one end of the sliding member being connected with the pump diaphragm, the sliding member being sleeved on the shaft, the sliding member being provided with an opening, a ball being arranged in the opening, the ball also being matched with the spiral groove, the rotation of the shaft driving the sliding member to move; a motor connected with the ring gear, the shaft of the motor being connected with the sun gear, the motor driving the sun gear to rotate.

Description

Technical Field

[0001] This application belongs to the field of oral irrigator technology, and relates to a water pump assembly and an oral irrigator including the water pump assembly. Background Technology

[0002] A water flosser is a device used for oral care. It uses a water pump assembly to draw water from a tank at a certain pressure and spray it out through the nozzle of the water flosser. The sprayed water jet rinses the teeth and cleans the mouth. It is widely used in people's daily lives.

[0003] Existing oral irrigators use diaphragm pumps, where the pump diaphragm is usually directly driven by a connecting rod and gears. During operation, the connecting rod will deflect and vibrate, which can easily damage the pump diaphragm and cause leakage in the pump chamber. In addition, the overall structure of the pump assembly is relatively large, which is not conducive to the miniaturization design of oral irrigators. The gear drive structure of Ruiyou has greater wear and is also noisier. Utility Model Content

[0004] This application aims to provide a water pump assembly with a strong drive structure, long service life, and a planetary gear balanced layout, resulting in low gear noise.

[0005] This application is achieved through the following technical solution.

[0006] This technical solution provides a water pump assembly, including: A diaphragm pump, comprising a pump housing and a pump diaphragm; A planetary gear set includes a ring gear, a planet carrier, planet gears, and a sun gear. Multiple planet gears are arranged around and mesh with the sun gear. Each planet gear is connected to the planet carrier via a shaft. The planet gears also mesh with the internal teeth of the ring gear. One end of the ring gear has a connecting portion that connects to the pump housing. A sliding hole is provided inside the connecting portion. The planet carrier has a shaft, and the outer wall of the shaft has a spiral groove that closes at both ends. A sliding member is provided in the sliding hole to perform linear reciprocating motion. One end of the sliding member is connected to the pump diaphragm. The sliding member is sleeved on the shaft. The sliding member has an opening. A ball is provided in the opening. The ball also fits in the spiral groove. The rotation of the shaft drives the sliding member to move. The motor is connected to the gear ring, and the shaft of the motor is connected to the sun gear. The motor drives the sun gear to rotate. After being reduced in speed by the planetary gear set, the motor drives the sliding member to perform linear reciprocating motion, thereby driving the pump diaphragm to move.

[0007] The technical advantages of this solution are that by using a planetary gear set as a reduction mechanism and utilizing the connection between the sliding component and the planetary carrier as the transmission mechanism for the pump diaphragm, the structure has strong load-bearing capacity and long service life. Because the planetary gear set can be balanced, the gear noise is lower. The transmission of the sliding component will not produce deflection or vibration, thus increasing the service life of the pump diaphragm.

[0008] In one embodiment of this technical solution, a limiting structure is provided between the slider and the sliding hole, and the limiting structure is used to restrict the slider from rotating within the sliding hole.

[0009] In one embodiment of this technical solution, the limiting structure includes a groove and a protrusion. The length direction of the groove is arranged along the movement direction of the sliding member, and the protrusion is fitted into the groove. The groove and the protrusion are respectively disposed on the sliding member and the inner wall of the sliding hole.

[0010] In one embodiment of this technical solution, the gear ring and the connecting part are integrally formed, and the pump diaphragm is clamped between the pump housing and the connecting part.

[0011] In one embodiment of this technical solution, the pump housing has an insertion hole at one end near the pump diaphragm, the connecting part is fixedly inserted into the insertion hole, and the end of the connecting part presses the pump diaphragm against the pump housing.

[0012] In one embodiment of this technical solution, the membrane pump further includes inlet and outlet end caps, which are connected to the pump casing. The inlet and outlet end caps are provided with an inlet channel and an outlet channel, and both the inlet channel and the outlet channel are provided with a one-way valve.

[0013] In one embodiment of this technical solution, the one-way valve is a valve plate, which is clamped between the pump housing and the inlet / outlet end caps.

[0014] In one embodiment of this technical solution, the other end of the gear ring away from the connecting part is also connected to a cover plate, the motor is connected to the cover plate, and the shaft of the motor passes through the cover plate and is connected to the sun gear.

[0015] In one embodiment of this technical solution, the number of planetary gears is three, and all the planetary gears are arranged in a centrally symmetrical manner around the sun gear.

[0016] Based on the above technical solutions, this application also provides a dental flosser, including the water pump assembly described in the above technical solutions.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0018] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0019] Figure 1 This is a schematic diagram of the structure of a water pump assembly shown in one embodiment of this application.

[0020] Figure 2 This is an exploded structural diagram of a water pump assembly shown in one embodiment of this application.

[0021] Figure 3 This is a cross-sectional structural schematic diagram of a water pump assembly shown in one embodiment of this application.

[0022] Figure 4 This is a schematic diagram of the gear ring structure shown in one embodiment of this application.

[0023] Figure 5 This is a schematic diagram of the structure of the slider shown in one embodiment of this application.

[0024] Explanation of reference numerals in the attached figures: 11-Diaphragm pump; 111-Pump casing; 116-Inlet and outlet end caps; 112-Pump diaphragm; 1121-Connecting column; 1122-Slot; 113-Inlet channel; 114-Outlet channel; 115-Check valve; 12-Planetary gear set; 121-Ring gear; 122-Connecting part; 1221-Sliding hole; 1222-Protrusion; 123-Planet carrier; 124-Shaft; 1241-Helical groove; 125-Sun gear; 126-Planet gear; 128-Cover plate; 13-Sliding component; 131-Opening; 132-Groove; 14-Ball bearing; 15-Motor. Detailed Implementation

[0025] The technical solutions of some embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0027] like Figures 1 to 5As shown in the figure, this application embodiment provides a water pump assembly for use in a water flosser. The water pump assembly includes a diaphragm pump 11, a planetary gear set 12, a slider 13, and a motor 15. The diaphragm pump 11 is a prior art technology and is used to generate water flow. The motor 15 serves as a power component. The planetary gear set 12 is used to reduce the speed of the motor 15 and simultaneously transmit power to drive the slider 13 to move. The slider 13 is used to drive the diaphragm pump 11 to work.

[0028] In this embodiment, the diaphragm pump 11 is a pump body with a diaphragm structure. The diaphragm pump 11 includes a pump housing 111 and a pump diaphragm 112. A pump chamber is formed inside the pump housing 111, and the pump diaphragm 112 is sealed in the pump chamber. An inlet and outlet end cap 116 is connected to one end of the pump housing 111. The inlet and outlet end cap 116 is provided with an inlet channel 113 and an outlet channel 114. Both the inlet channel 113 and the outlet channel 114 are provided with a one-way valve 115. The inlet channel 113 is connected to the water tank of the oral irrigator through a hose, and the outlet channel 114 is connected to the nozzle of the oral irrigator.

[0029] In this embodiment, the one-way valve 115 is a valve plate, which is clamped between the pump housing 111 and the inlet / outlet end cap 116.

[0030] In this embodiment, the planetary gear set 12 includes a gear ring 121, a planet carrier 123, planet gears 126 and a sun gear 125. Multiple planet gears 126 are arranged around the sun gear 125 and mesh with the sun gear 125. All planet gears 126 are connected to the planet carrier 123 through a rotating shaft. The planet gears 126 also mesh with the internal teeth of the gear ring 121.

[0031] A connecting portion 122 is formed at one end of the gear ring 121, which is connected to the pump housing 111. A sliding hole 1221 is provided inside the connecting portion 122. The planetary carrier 123 is provided with a shaft 124, which is integrally formed with the planetary carrier 123 and rotates simultaneously. The outer wall of the shaft 124 is provided with a spiral groove 1241 that closes at both ends. The spiral groove 1241 of the shaft 124 is a groove with a semi-circular cross-section to accommodate spherical balls 14. The spiral groove 1241 surrounds the outer surface of the shaft 124 and is symmetrically arranged.

[0032] In this embodiment, the slider 13 is disposed within the sliding hole 1221 and performs linear reciprocating motion. One end of the slider 13 is connected to the pump diaphragm 112. The movement of the slider 13 can drive the pump diaphragm 112 to extend and retract. The slider 13 is sleeved on the shaft 124. The side of the slider 13 is provided with an opening 131, which can be a through hole or a blind hole. The opening 131 corresponds to the spiral groove 1241. A ball bearing 14 is disposed within the opening 131, and the ball bearing 14 also cooperates within the spiral groove 1241. That is, a structure similar to a ball bearing 14 lead screw is formed between the slider 13 and the shaft 124. Thus, the rotation of the shaft 124 causes the ball bearing 14 to move along the spiral groove 1241, thereby driving the slider 13 to move. To prevent the slider 13 from rotating axially around the connection within the sliding hole 1221, the sliding needs to be restricted. A limiting structure is provided between the slider 13 and the sliding hole 1221 to restrict the slider 13 from rotating within the sliding hole 1221. Specifically, the limiting structure includes a groove 132 formed on the outer surface of the slider 13 and a protrusion 1222 formed on the inner surface of the sliding hole 1221. The length direction of the groove is along the movement direction of the slider 13, and the protrusion engages within the groove.

[0033] In other embodiments, the slider 13 can also be rectangular in shape, and with the rectangular sliding hole 1221, it can also achieve the purpose of preventing the slider 13 from rotating, without affecting the reciprocating motion of the slider 13.

[0034] In this embodiment, the motor 15 is connected to the gear ring 121 through the cover plate 128. The other end of the gear ring 121 away from the connecting part 122 is also connected to the cover plate 128. The motor 15 is connected to the cover plate 128. The shaft of the motor 15 passes through the cover plate 128 and is connected to the sun gear 125. The motor 15 drives the sun gear 125 to rotate. After the motor 15 is reduced in speed by the planetary gear set 12, it drives the sliding member 13 to perform linear reciprocating motion, so as to drive the pump diaphragm 112 to move.

[0035] In this embodiment, the gear ring 121 and the connecting part 122 are integrally formed, and the pump diaphragm 112 is clamped between the pump housing 111 and the connecting part 122. An insertion hole is provided at one end of the pump housing 111 near the pump diaphragm 112, and the connecting part 122 is inserted into the insertion hole and fixed with screws. The end of the connecting part 122 presses the pump diaphragm 112 onto the pump housing 111.

[0036] In this embodiment, the slider 13 is a hollow tubular structure. The end of the slider 13 near the pump membrane 112 forms an inward opening. The connecting post 1121 of the pump membrane 112 is provided with a slot 1122. The slider 13 and the pump membrane 112 are connected by the inward opening and the slot 1122.

[0037] In this embodiment, there are three planetary gears 126, and all the planetary gears 126 are arranged symmetrically around the sun gear 125.

[0038] The working principle of the water pump assembly in this embodiment is as follows: the motor 15 drives the sun gear 125 to rotate, and the sun gear 125 drives the three planet gears 126 to rotate on the planet gears 126. Since the planet gears 126 mesh with the internal teeth of the gear ring 121, the planet carrier 123 and the shaft 124 rotate. The rotation of the shaft 124 drives the sliding member 13 to reciprocate, thereby driving the diaphragm pump 11 to work.

[0039] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A water pump assembly, characterized in that, include: A diaphragm pump (11) includes a pump housing (111) and a pump diaphragm (112); the pump diaphragm (112) is fixed to the pump housing (111); The planetary gear set (12) includes a gear ring (121), a planet carrier (123), planet gears (126), and a sun gear (125). Multiple planet gears (126) are arranged around and mesh with the sun gear (125). Each planet gear (126) is connected to the planet carrier (123) via a rotating shaft. The planet gears (126) also mesh with the internal teeth of the gear ring (121). One end of the gear ring (121) has a connecting portion (122), which is connected to the pump housing (111). A sliding hole (1221) is provided inside the connecting portion (122). The planet carrier (123) has a shaft (124), and the outer wall of the shaft (124) has a closed spiral groove (1241). A sliding member (13) is provided in the sliding hole (1221) to perform linear reciprocating motion. One end of the sliding member (13) is connected to the pump diaphragm (112). The sliding member (13) is sleeved on the shaft (124). The sliding member (13) has an opening (131). A ball (14) is provided in the opening (131). The ball (14) is also fitted in the spiral groove (1241). The rotation of the shaft (124) drives the sliding member (13) to move. The motor (15) is connected to the gear ring (121), and the shaft of the motor (15) is connected to the sun gear (125). The motor (15) drives the sun gear (125) to rotate. After the motor (15) is decelerated by the planetary gear set (12), it drives the sliding member (13) to perform linear reciprocating motion, so as to drive the pump membrane (112) to move.

2. The water pump assembly according to claim 1, characterized in that, A limiting structure is provided between the slider (13) and the sliding hole (1221), and the limiting structure is used to restrict the slider (13) from rotating within the sliding hole (1221).

3. The water pump assembly according to claim 2, characterized in that, The limiting structure includes a groove (132) and a protrusion (1222). The length direction of the groove (132) is arranged along the movement direction of the sliding member (13). The protrusion (1222) is fitted into the groove (132). The groove (132) and the protrusion (1222) are respectively disposed on the sliding member (13) and the inner wall of the sliding hole (1221).

4. The water pump assembly according to claim 1, characterized in that, The gear ring (121) and the connecting part (122) are integrally formed, and the pump diaphragm (112) is clamped between the pump housing (111) and the connecting part (122).

5. The water pump assembly according to claim 4, characterized in that, The pump housing (111) has an insertion hole at one end near the pump diaphragm (112), the connecting part (122) is fixedly inserted into the insertion hole, and the end of the connecting part (122) presses the pump diaphragm (112) onto the pump housing (111).

6. The water pump assembly according to claim 1, characterized in that, The membrane pump (11) also includes an inlet and outlet end cap (116), which is connected to the pump housing (111). The inlet and outlet end cap (116) is provided with an inlet channel (113) and an outlet channel (114), and both the inlet channel (113) and the outlet channel (114) are provided with a one-way valve (115).

7. The water pump assembly according to claim 6, characterized in that, The one-way valve (115) is a valve plate, which is clamped between the pump housing (111) and the inlet / outlet end cap (116).

8. The water pump assembly according to claim 1, characterized in that, The gear ring (121) is connected to a cover plate (128) at the other end away from the connecting part (122). The motor (15) is connected to the cover plate (128), and the shaft of the motor (15) passes through the cover plate (128) and is connected to the sun gear (125).

9. The water pump assembly according to claim 1, characterized in that, The number of planetary gears (126) is three, and all the planetary gears (126) are arranged in a centrally symmetrical manner around the sun gear (125).

10. A dental flosser, characterized in that, Includes the water pump assembly as described in any one of claims 1 to 9.

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