CN214304288U - Water pump with rolling bearing - Google Patents

Abstract

The utility model relates to a water pump (100) with antifriction bearing, include: motor (1) and pump body (2), pump body (2) includes: base (21), diaphragm seat (3), transmission (4), runner (5) and curved bar (6), wherein be provided with antifriction bearing (10) in mounting hole (63) of curved bar (6), the outer lane rotation of antifriction bearing (10) is fixed to mounting hole (63), the inner circle rotation of antifriction bearing (10) is fixed to eccentric post (53), just antifriction bearing (10) with eccentric post (53) coaxial setting.

Description

Water pump with rolling bearing

Technical Field

The utility model relates to a water pump specifically is a water pump with antifriction bearing.

Background

The micro water pump is a distribution device for pressure fluid application equipment, and has wide application scenes. For example, in a diaphragm type micro water pump, a motor rotates to drive a transmission device to make a diaphragm in the water pump perform reciprocating motion, so that air in a pump cavity is compressed and stretched, and a pressure difference is formed to pump water in or out.

However, different pressure fluid application equipment may have different requirements for the pressure at which the fluid is pumped. For example, in an american coffee machine, a pressure of the pumped water stream of 1 bar is sufficient to obtain an acceptable american coffee. However, for espresso coffee, the pressure of the pumped water stream is required to reach about 9 bar. In addition to high pressure, continuous and stable pressure, low noise and as small a volume as possible of the application device in which the fluid pump is installed for easy placement are required.

Further, the diaphragm water pump generates a component force (may also be referred to as an "eccentric force") in a direction perpendicular to the rotational axis of the motor output shaft, affecting the axial assembly accuracy.

SUMMERY OF THE UTILITY MODEL

Therefore, an object of the present invention is to provide a solution to the above-mentioned problems. This purpose is realized through according to the utility model discloses a water pump, the water pump includes: a motor having a motor output shaft extending along a longitudinal axis; and a pump body.

The pump body includes: a base mounted to the motor; a diaphragm seat having a plurality of compressible diaphragm units disposed thereon; a transmission connected with the motor output shaft to receive torque from the motor output shaft; a runner connected to a transmission to receive torque from a motor, the runner having a first central axis of extension and first and second surfaces opposite along the first central axis of extension, the first surface facing the diaphragm seat and being provided with a projecting eccentric post, the second central axis of extension of the eccentric post having an angle with the first central axis of extension of the runner; a knee lever having a mounting hole along a first side of the longitudinal axis proximate the runner, a second side opposite the first side being connected to the diaphragm unit.

The eccentric column is arranged in the crank rod, the inner ring of the eccentric column is fixed in the crank rod, and the outer ring of the crank rod is fixed in the crank rod.

With the above feature, the provision of the eccentric columns can significantly enhance the rigidity of the transmission members and reduce the size of the water pump, and therefore, most of the high pressure generated in the reciprocating suction and compression movements of the diaphragm unit will be axially transmitted via the eccentric columns and the rolling bearings in the axial direction. Therefore, the pressure of the water pump discharging water flow can be improved, so that the water pump is particularly suitable for high-pressure fluid application equipment such as an Italian coffee machine.

In some examples, a shaft shoulder is formed on the first surface of the runner around the eccentric post, against which the inner ring of the rolling bearing abuts.

By the above features, the shoulder may provide reliable axial support and force conduction.

In some examples, the shoulder is perpendicular to the second central extension axis of the eccentric post. Thereby, the force can be transmitted evenly to the shoulder along the second centrally extending axis of the eccentric cylinder.

In some examples, the second surface of the runner has an axial bore along the longitudinal axis, with a shaft disposed in the axial bore, the shaft having one end mounted in the axial bore and the other end mounted to the base.

In some examples, a thrust bearing is disposed between the runner and the base, the thrust bearing being disposed coaxially with the runner.

With the above feature, the thrust bearing can provide support in the axial direction (longitudinal axis direction) to transmit force to the pump body without being directly transmitted to a crank lever, a runner, a series of transmission gears, and the like as in the conventional art.

In some examples, the water pump further includes a mounting plate rotationally fixed to the base, the mounting plate including a first support aperture, the rotor being rotatably supported in the first support aperture along a first axis of the first support aperture.

According to the above feature, by providing the mounting plate fixed to the base to provide support to the runner, the component force originally received by the runner and the motor output shaft is indirectly received by the base. Therefore, the motion rigidity of the rotating wheel and the motor output shaft is improved, and the service life of the water pump is prolonged.

In some examples, a stopping part is arranged on the inner wall of the base, and a matching part matched with the stopping part is arranged on the outer edge of the mounting plate.

By the above features, a simple and reliable assembly feature is provided, facilitating assembly of the mounting plate.

In some examples, the transmission includes a driven shaft parallel to the motor output shaft, and the mounting plate further includes a second bearing hole in which the driven shaft is rotatably supported along a second axis of the second bearing hole.

Through the characteristics, the mounting plate can also provide support for the driven shaft of the motor output shaft, so that the motion rigidity of the driven shaft is improved, and the service life of the driven shaft is prolonged.

The technical scheme of the utility model beneficial effect lies in: through setting up the diameter bigger and with the eccentric column and antifriction bearing and the thrust bearing that the runner formed an organic whole, reduced the size of water pump to the axial pressure that will originally born by runner and motor output shaft is born by the pump body (base) indirectly. Further, by providing a mounting plate fixed to the base to provide support to the runner, the component forces that would otherwise be borne by the runner and the motor output shaft are indirectly borne by the base. Therefore, the motion rigidity of the rotating wheel and the motor output shaft is improved, and the service life of the water pump is prolonged.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description relate only to some embodiments of the present disclosure and are not limiting to the present disclosure.

FIG. 1 illustrates an overall schematic view of a water pump according to an embodiment of the present disclosure;

FIG. 2 shows a cross-sectional view taken along line B-B of FIG. 1;

FIG. 3 illustrates a partial schematic view of a water pump according to an embodiment of the present disclosure, with a septum housing and above omitted;

FIG. 4 shows a top view of the embodiment of FIG. 3 with the knee lever omitted;

FIG. 5 shows an exploded view of the embodiment of FIG. 3;

FIG. 6 shows a schematic view of a wheel according to an embodiment of the present disclosure;

FIG. 7 shows a cross-sectional view taken along line C-C in FIG. 6;

FIG. 8A illustrates a top view of a knee lever according to an embodiment of the present disclosure;

fig. 8B shows a cross-sectional view taken along line D-D in fig. 8A.

List of reference numerals

1 Motor

11 motor output shaft

2 Pump body

21 base

210 stop part

3 diaphragm seat

4 driving device

41 driven shaft

5 rotating wheel

51 first surface

52 second surface

53 eccentric column

54 shaft shoulder

55 axle hole

6 curved bar

61 first side

62 second side

63 mounting hole

7 shaft lever

8 mounting plate

81 first support hole

82 second bearing hole

83 mating part

10 rolling bearing

20 thrust bearing

100 water pump

A longitudinal axis

X second central extension axis

Y first central extension axis

M1 first axis

M2 second axis

Angle theta

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the embodiments of the present disclosure will be described in detail and completely with reference to the accompanying drawings of specific embodiments of the present disclosure. Like reference symbols in the various drawings indicate like elements. It should be noted that the described embodiments are only some of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in the description and claims of the present disclosure are not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

To less, the diaphragm pump eccentric force scheduling problem of current water pump rivers pressure, the utility model provides a water pump aim at with antifriction bearing solves above-mentioned problem, reduces the overall size of water pump simultaneously, improves the transmission precision and the life of water pump.

Preferred embodiments of a water pump according to the present disclosure will be described in detail below with reference to the accompanying drawings. FIG. 1 illustrates an overall schematic view of a water pump according to an embodiment of the disclosure. Fig. 2 shows a cross-sectional view taken along line B-B in fig. 1. FIG. 3 illustrates a partial schematic view of a water pump according to an embodiment of the present disclosure with a septum housing and above omitted. Fig. 4 shows a top view of the embodiment shown in fig. 3, with the knee lever omitted. Fig. 5 shows an exploded view of the embodiment shown in fig. 3. FIG. 6 shows a schematic view of a wheel according to an embodiment of the present disclosure. Fig. 7 shows a cross-sectional view taken along line C-C in fig. 6.

Possible embodiments within the scope of the disclosure may have fewer components, have other components not shown in the figures, different components, differently arranged components or differently connected components, etc. than the embodiments shown in the figures. Further, two or more of the components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components, without departing from the concepts of the present disclosure.

It should be noted that although the water pump described in this disclosure is primarily used for driving and dispensing water, it may also be used for other fluids, including but not limited to solutions, oils, etc.

Referring to fig. 1 to 4, the present disclosure provides a water pump 100 including: a motor 1 and a pump body 2. The pump body 2 may in particular comprise: base 21, diaphragm seat 3, transmission 4, runner 5, curved bar 6 and shaft 7.

The motor 1 has a longitudinal axis a and the motor 1 is used to power the water pump. As shown in fig. 6, the motor 1 has a motor output shaft 11 extending along a longitudinal axis a. The torque of the motor 1 is output through a motor output shaft 11 and is transmitted via a transmission 4, such as a series of transmission gears, to drive the water pump 100 to operate.

The pump body 2 may have a cylindrical outer profile, the generatrix of which may be parallel to the longitudinal axis a of the motor. The pump body 2 shown in fig. 1 has a substantially square-cylindrical profile, it being understood that the pump body 2 may have profiles of other shapes as desired, for example, a cylindrical profile, a rectangular-cylindrical profile having a substantially rectangular cross section. The main housing 1 defines an accommodating space therein for accommodating components of the water pump 100.

The diaphragm seat 3 is provided with a plurality of compressible diaphragm units, as will be described in more detail below. The diaphragm seat 3 is located on the other side of the pump body 2 with respect to the motor 1 and is connected to the pump body 2.

The water pump 100 may further include a valve seat for providing one-way valve portions therein, such as an inlet valve and an outlet valve, for one-way passage of fluid, and an upper cover for sealing the fluid pump and providing an inlet and an outlet for fluid, which may be employed by those skilled in the art, without limitation.

The base 21 is mounted on one side to the motor 1 and on the other side to the diaphragm seat 3. The motor 1, the base 21, the diaphragm seat 3, the valve seat and the upper cover can be connected together by fixing elements. For example, the fixing element may be an elongated fixing element, such as a bolt, passing through the upper cover, the valve seat, the diaphragm seat 3, the base 21 and the motor 1. Alternatively, the fixing elements may be snaps, and the components are connected one by one through the snaps.

The transmission 4 is connected with the motor output shaft 11 to receive torque from the motor output shaft 11. The transmission 4 may be a series of transmission gears, for example a two-stage reduction gear train. Alternatively, the transmission 4 may be a worm gear or other transmission commonly used in the art, and the disclosure is not limited thereto.

Typical diaphragm water pumps employ a runner, a bent rod and a drive shaft to actuate a diaphragm unit. The torque output by the motor output shaft is transmitted to the rotating wheel through the transmission device, and the rotating wheel rotates to drive the driving shaft arranged in the eccentric hole to rotate, so that the curved rod connected to the driving shaft is driven to rotate. Unlike the conventional diaphragm water pump, only the runner 5 and the crank lever 6 constitute the components of the embodiment of the present disclosure that reciprocate the diaphragm water pump, i.e., the water pump proposed by the present disclosure integrates the runner and the drive shaft. The advantage of this arrangement is that the diameter of the eccentric cylinder (corresponding to the drive shaft) can be dimensioned larger, so that the transmission rigidity of the water pump is significantly increased compared to a slim drive shaft. Furthermore, due to the integrated runner and eccentric post, the dimensions in the longitudinal axis direction may be correspondingly reduced, and a smaller volume of the water pump may be obtained, which may be advantageous in many applications, such as domestic or portable fluid application devices.

In the present embodiment, the runner 5 is connected with the transmission 4 to receive torque from the motor 1.

As shown in fig. 7, the runner 5 has a first central extension axis Y and a first surface 51 and a second surface 52 opposite along the first central extension axis Y, the first surface 51 faces the diaphragm seat 3 and is provided with a protruding eccentric post 53, and the second central extension axis X of the eccentric post 53 has an angle θ with the first central extension axis Y of the runner 5.

Alternatively, in this embodiment, with reference to fig. 2 and 7, the second surface 52 of the runner 5 has an axial hole 55 along the longitudinal axis a, the shaft 7 is disposed in the axial hole 55, one end of the shaft 7 is mounted in the axial hole 55, and the other end is mounted to the base 21.

FIG. 8A illustrates a top view of a knee lever according to an embodiment of the present disclosure. Fig. 8B shows a cross-sectional view taken along line D-D in fig. 8A.

As shown in fig. 8A and 8B, a first side 61 of the knee lever 6 adjacent the wheel 5 along the longitudinal axis a has a mounting hole 63, and a second side 62 opposite the first side 61 is connected to the diaphragm unit.

A rolling bearing 10 is provided in the mounting hole 63 of the crank lever 6, and an outer ring of the rolling bearing 10 is rotationally fixed to the mounting hole 63. Meanwhile, the inner ring of the rolling bearing 10 is rotationally fixed to the eccentric post 53 of the runner 5, and the rolling bearing 10 is disposed coaxially with the eccentric post 53, as shown in fig. 2.

As shown in fig. 6 and 7, a shaft shoulder 54 is formed on the first surface 51 of the runner 5 around the eccentric post 53, and the inner ring of the rolling bearing 10 abuts against the shaft shoulder 54. The shaft shoulder 54 may be used to abut and support the inner ring of the rolling bearing 10.

Thereby, a substantial part of the high pressure generated in the reciprocating suction and compression movements of the diaphragm unit will be axially transmitted via the eccentric post 53 and the rolling bearing 10 in the axial direction.

Optionally, the shaft shoulder 54 is perpendicular to the second central extension axis X of the eccentric column 53.

Optionally, the second surface 52 of the wheel 5 has an axial hole 55 along the longitudinal axis a for mounting the shaft 7.

For example, the shaft 7 is provided in the shaft hole 55, and one end of the shaft 7 is mounted in the shaft hole 55 and the other end is mounted to the base 21. The shaft 7 is mainly used to provide a rotation axis for the runner 5.

In the preferred embodiment, a thrust bearing 20 is provided between the rotor 5 and the base 21, the thrust bearing 20 being disposed coaxially with the rotor 5.

The thrust bearing 20 may provide support in the axial direction (longitudinal axis direction) so as to transmit the force to the pump body 2, for example the base 21, and not directly to the crankshaft, the runner, the series of transmission gears, etc., as in the conventional art.

When the water pump 100 works, the torque output by the motor 1 is transmitted to the rotating wheel 5 to drive the rotating wheel 5 to rotate, the rotation of the rotating wheel 5 drives the curved rod 6 to move through the eccentric column 53, and the rotation of the curved rod 6 enables the plurality of membrane units to alternately compress and suck due to the fact that the extension line of the eccentric column 53 forms an included angle theta with the axis Y. When pumping, fluid enters the interior of the water pump 100 from the inlet of the upper cover, and the inlet valve on the valve seat opens to allow fluid to pass through and into the diaphragm unit. When compressed, the fluid is forced out of the diaphragm unit and causes the discharge valve to open, discharging out of the water pump 100 via the upper cover outlet. In this way, the rotary drive of the motor 1 drives the diaphragm unit to reciprocate to suck and compress, and the distribution and the conveying of the fluid are realized.

Since the eccentric columns 53 form an angle with the axis Y, a component force, i.e., an eccentric force, is generated in a direction perpendicular to the axis Y. In a high-speed and high-pressure working state, the component force has a large value, so that a large acting force is applied to the radial direction of the driving shaft and the rotating wheel, the rigidity of the component along the whole axis Y or the longitudinal axis A is reduced, and the service life of the water pump is shortened. It is therefore also necessary to provide adequate radial support for the rotor wheel 5.

To this end, the water pump 100 further includes a mounting plate 8, as shown in fig. 2 to 4. The mounting plate 8 is rotatably fixed to the base 21 and includes a first support hole 81, and the runner 5 is rotatably supported in the first support hole 81 along a first axis M1 of the first support hole 81.

In the present embodiment, a stopper portion 210 is provided on an inner wall of the base 21. Correspondingly, a matching part 83 matched with the stopping part 210 is also arranged at the outer edge of the mounting plate 8.

For example, the number of the stoppers 210 is four, and the stoppers are respectively provided on four inner walls of the square base 21 and extend toward the inside of the base 21 at one end of the base 21 near the diaphragm seat 3. The stopper portion 210 may be semicircular in shape. The outer edge of the mounting plate 8 is correspondingly provided with four mating portions 83, the mating portions 83 matching the shape and size of the stop 210, also being circular arc shaped. Furthermore, a projection may also be provided in the base 21 to support the mounting plate 8 in the direction of the longitudinal axis a (not shown). Thus, the mounting plate 8 may be rotationally fixed to the base 21. Alternatively, the number of the stopping portions 210 and the matching portions 83 may also be other numbers, such as one, two, three or even more than four, and meanwhile, the shapes of the stopping portions 210 and the matching portions 83 are not limited to the illustrated embodiment, but may also be, for example, a strip shape, a rectangular shape or other shapes, as long as the effect of rotation fixing can be achieved, and the disclosure is not limited thereto.

As shown in fig. 6, the wheel 5 may be provided as a cylindrical body with a gear portion connected to the transmission 4 to receive the torque from the motor 1, the cylindrical body portion being rotatably supported in the first support hole 81. The cylindrical portion and the first supporting hole 81 may include a lubricant therebetween, or the contact portion may include a member for sliding lubrication, so that the first supporting hole 81 provides radial support while also ensuring lubrication.

Alternatively, a rolling bearing may be provided in the first bearing hole 81, and the runner 5 may be provided in the rolling bearing.

In this embodiment, the transmission 4 further comprises a driven shaft 41 parallel to the motor output shaft 11. Meanwhile, the mounting plate 8 may further include a second bearing hole 82, and the driven shaft 41 is rotatably supported in the second bearing hole 82 along a second axis M2 of the second bearing hole 82. By providing the second bearing hole 82, support of one end of the driven shaft 41 is provided, stability and rigidity of the driven shaft 41 are improved, and transmission accuracy of the transmission device 4 is improved, relative to a cantilever form in which the end is not supported.

For example, the mounting plate 8 may be provided with at least one second support hole 82. In the present embodiment, four second supporting holes 82 are uniformly arranged in the circumferential direction, which is advantageous in that the mounting plate 8 can be mounted with the second supporting holes 82 capable of engaging with the driven shaft 41 regardless of the direction of the mounting plate 8, i.e., any rotational direction, and the mounting is facilitated.

The above description is only for the specific embodiments of the present disclosure, but the scope of the embodiments of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of the changes, substitutions or combinations within the technical scope of the embodiments of the present disclosure or under the concept of the embodiments of the present disclosure, and all of them should be covered by the scope of the embodiments of the present disclosure.

Claims (8)

1. A water pump, comprising:

a motor (1) having a motor output shaft (11) extending along a longitudinal axis (A); and

pump body (2) comprising:

a base (21) mounted to the motor (1);

the diaphragm seat (3) is provided with a plurality of compressible diaphragm units;

a transmission (4) connected with the motor output shaft (11) to receive torque from the motor output shaft (11);

-a runner (5) connected to the transmission (4) to receive torque from the motor (1), the runner (5) having a first central extension axis (Y) and first and second surfaces (51, 52) opposite along the first central extension axis (Y), the first surface (51) facing the diaphragm seat (3) and being provided with a projecting eccentric post (53), the second central extension axis (X) of the eccentric post (53) having an angle (θ) with the first central extension axis (Y) of the runner (5);

a knee lever (6), said knee lever (6) having a mounting hole (63) along a first side (61) of said longitudinal axis (A) close to said runner (5), a second side (62) opposite to said first side (61) being connected to a diaphragm unit;

wherein a rolling bearing (10) is arranged in a mounting hole (63) of the curved rod (6), an outer ring of the rolling bearing (10) is rotationally fixed to the mounting hole (63), an inner ring of the rolling bearing (10) is rotationally fixed to the eccentric column (53), and the rolling bearing (10) and the eccentric column (53) are coaxially arranged.

2. The water pump according to claim 1, characterized in that a shaft shoulder (54) is formed on the first surface (51) of the runner (5) around the eccentric post (53), the inner ring of the rolling bearing (10) abutting against the shaft shoulder (54).

3. A water pump according to claim 2, wherein the shaft shoulder (54) is perpendicular to the second central extension axis (X) of the eccentric post (53).

4. A water pump according to claim 1, characterized in that the second surface (52) of the runner (5) has an axial hole (55) along the longitudinal axis (a), in which axial hole (55) a shaft (7) is arranged, which shaft (7) is mounted with one end in the axial hole (55) and with the other end to the base (21).

5. The water pump according to claim 1, characterized in that a thrust bearing (20) is arranged between the runner (5) and the base (21), the thrust bearing (20) being arranged coaxially with the runner (5).

6. The water pump of claim 1, further comprising:

a mounting plate (8) rotationally fixed to the base (21), the mounting plate (8) including a first support hole (81), the wheel (5) being rotatably supported in the first support hole (81) along a first axis (M1) of the first support hole (81).

7. The water pump according to claim 6, wherein a stopper portion (210) is provided on an inner wall of the base (21), and an engaging portion (83) that engages with the stopper portion (210) is provided on an outer edge of the mounting plate (8).

8. The water pump according to claim 7, wherein the transmission (4) includes a driven shaft (41) parallel to the motor output shaft (11), the mounting plate (8) further includes a second bearing hole (82), and the driven shaft (41) is rotatably supported in the second bearing hole (82) along a second axis (M2) of the second bearing hole (82).

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