WO2015029380A1

WO2015029380A1 - Mixer unit and hand blender

Info

Publication number: WO2015029380A1
Application number: PCT/JP2014/004254
Authority: WO
Inventors: 矢野　一也; 大村　真吾; 隆彦白井
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2013-09-02
Filing date: 2014-08-20
Publication date: 2015-03-05
Also published as: JPWO2015029380A1; CN105451618B; CN105451618A

Abstract

Disclosed is a mixer unit (2) that is driven by a motor and is provided with a hood (5), a partition (13), a mixing chamber (4), an internal mechanism (3), a rotating shaft (7), and a pulverizing blade (6). The hood has a bell shape that is provided with an opening. The partition divides the space inside the hood and has a through hole. The mixing chamber is provided in the space inside the hood from the partition to the opening. The internal mechanism is provided in the space inside the hood that is divided from the mixing chamber by the partition, includes a bearing (8) and a shaft packing (11), and has a ventilation channel that is for ventilation between a motor side and a partition side of the bearing. The rotating shaft passes through the internal mechanism, has one end that is connected to a motor, and has another end that protrudes from the through hole into the mixing chamber. The bearing pivotably supports the rotating shaft. The shaft packing is provided between the bearing and the partition concentric with the rotating shaft and seals a gap (13a) between the through hole of the partition and the rotating shaft. The pulverizing blade is provided to the rotating shaft inside the mixing chamber.

Description

Mixer unit and hand blender

This disclosure relates to a blender unit provided in a hand blender used in a general household.

The hand blender is an instrument that is provided at the tip of a rotating shaft and finely pulverizes and mixes food by rotation of a pair of pulverizing blades extending in the centrifugal direction of the rotating shaft (see, for example, Patent Document 1).

FIG. 4 is an external view showing a hand blender having a conventional mixer unit described in Patent Document 1. FIG. FIG. 5 is a cross-sectional view showing a conventional mixer unit described in Patent Document 1. As shown in FIG.

Hereinafter, a conventional mixer unit will be described with reference to FIGS. 4 and 5.

4 and 5, the mixer unit 52 is provided at the tip of the main body 1 of the hand blender. A hood 55 (Hood 55) is provided at the tip of the mixer unit 52.

The mixer unit 52 includes a partition wall 61 that partitions the internal space of the hood 55 into a space in which an internal mechanism 53 (Internal mechanisms 53) is provided and a space in the mixing chamber 54 (Blending chamber 54). The partition wall 61 has a through hole through which the rotation shaft 57 passes in the center.

One end of the rotating shaft 57 is connected to a motor (not shown) provided in the main body 1. The other end of the rotating shaft 57 passes through the partition wall 61 and protrudes into the mixing chamber 54, and a crushing blade 56 is caulked and fixed to the tip thereof.

The mixer unit 52 includes a bush 58 (Bush 58), a bush sleeve 59 (Bush sleeve 59), and a shaft seal 60 (Shaft seal 60) as the internal mechanism 53.

The bush sleeve 59 is provided in the hood 55 so as to fill a space between the inner wall of the hood 55 and the bush 58. The bush 58 is fixed to the bush sleeve 59 and supports the rotating shaft 57.

The shaft seal 60 is provided concentrically with the rotating shaft 57 between the bush sleeve 59 and the partition wall 61, and seals a gap 61a (Clearance 61a) between the through hole of the partition wall 61 and the rotating shaft 57.

According to the conventional mixer unit, the ventilation between the main body 1 and the mixing chamber 54 is completely blocked by the bush sleeve 59 and the shaft seal 60.

The hand blender has a motor for driving the rotary shaft 57, a power source for the motor, and a control unit for controlling the motor (all not shown) inside the main body 1.

In order to make vegetable soup using the above-mentioned conventional hand blender, for example, the mixer unit 52 is pushed into the stewed vegetables in the pan, the power is turned on, and the grinding blade 56 is rotated at, for example, 10,000 rpm. Rotate at high speed. Thereby, vegetables are crushed and mixed, and vegetable soup is easily completed.

In the conventional mixer unit, a strong suction force to the mixer unit 52 is generated when the food is pulverized and mixed. This is because the food in the mixing chamber 54 is driven to the vicinity of the hood 55 by the rotating water flow generated in the mixing chamber 54 by the grinding blade 6 rotating at high speed, and a negative pressure state is generated in the vicinity of the rotating shaft 57 in the mixing chamber 54. Because.

With the occurrence of this negative pressure state, the food material below the mixing chamber 54 is sucked near the rotating shaft 57, and a suction force is generated to suck the mixer unit 52 to the bottom of the pan.

Because of this suction force, a hand blender equipped with a conventional mixer unit is difficult to move up and down and left and right and has poor operability. As a result, it becomes difficult to pulverize and mix the uniform ingredients, and the crushed vegetable particles are coarse and a soup with a poor texture is produced. Moreover, the suction force with respect to the mixer unit becomes an overload on the motor, and heat generation in the main body 1 is increased.

European Patent Application Publication No. 1389440

This disclosure is intended to provide a mixer unit that can improve the operability by reducing the negative pressure state generated in the mixing chamber during operation, and can uniformly grind and mix the ingredients.

In order to solve the above conventional problems, a mixer unit according to one aspect of the present disclosure is driven by a motor, and includes a hood, a partition wall, a mixing chamber, an internal mechanism, a rotating shaft, and pulverization. A blade.

The hood has a bell shape with an opening. The partition wall defines a space in the hood and has a through hole. The mixing chamber is provided in a space in the hood from the partition wall to the opening. The internal mechanism is provided in a space in the hood partitioned from the mixing chamber by a partition wall. The rotating shaft is provided so as to penetrate the internal mechanism, one end is connected to the motor, and the other end projects from the through hole into the mixing chamber.

¡Bearing is included in the internal mechanism and supports the rotating shaft. The shaft packing is included in the internal mechanism, is provided concentrically with the rotating shaft between the bearing and the partition wall, and seals the gap between the through hole and the rotating shaft. The grinding blade is provided on the rotating shaft in the mixing chamber.

The internal mechanism has a ventilation path that ensures ventilation between the motor side of the bearing and the partition wall side of the bearing.

According to this aspect, air is injected into the mixing chamber from the main body via the air passage provided in the internal mechanism due to the negative pressure state generated in the mixing chamber during operation. As a result, the negative pressure state generated in the mixing chamber is alleviated, and the suction force to the mixer unit is reduced.

In this way, the operability is improved, a uniform food material can be crushed and mixed, and a mixer unit that can make a soup or juice having a good texture can be configured.

FIG. 1 is a longitudinal sectional view of a mixer unit according to an embodiment of the present disclosure. FIG. 2A is a perspective view of a bearing packing in the mixer unit according to the embodiment of the present disclosure. FIG. 2B is a perspective view of the bearing packing in the mixer unit according to the embodiment of the present disclosure. FIG. 3A is a perspective view of a shaft packing in the mixer unit according to the embodiment of the present disclosure. FIG. 3B is a longitudinal sectional view of the shaft packing in the mixer unit according to the embodiment of the present disclosure. FIG. 4 is a perspective view showing a conventional hand blender. FIG. 5 is a longitudinal sectional view showing a conventional mixer unit.

The mixer unit according to the first aspect of the present disclosure is driven by a motor, and includes a hood, a partition, a mixing chamber, an internal mechanism, a rotating shaft, and a grinding blade.

According to this aspect, the air pressure in the space on the motor side of the bearing and the air pressure in the space on the partition wall side of the bearing can be made equal by the air passage provided in the internal mechanism.

In the mixer according to the second aspect of the present disclosure, in the first aspect, the internal mechanism includes a bearing packing that fixes the bearing, and a fixing ring that is provided on the inner wall of the hood and fixes the bearing packing. The air passage is a groove provided in the axial direction of the rotary shaft on the outer periphery of the bearing packing.

According to this aspect, the air passage can be easily provided in the internal mechanism only by providing the groove on the outer periphery of the bearing packing.

A mixer unit according to a third aspect of the present disclosure is the mixer unit according to the first aspect, in which the shaft packing allows the fluid flowing out from the internal mechanism to the mixing chamber through the gap between the through hole and the rotation shaft, and passes therethrough. A fluid having a check valve structure that shuts off a fluid flowing into the internal mechanism from the mixing chamber via a gap between the hole and the rotating shaft is provided.

According to this aspect, when a negative pressure state occurs in the mixing chamber during operation, air is injected from the main body into the mixing chamber via the air passage provided in the internal mechanism and the shaft packing. As a result, the negative pressure state generated in the mixing chamber is alleviated, and the suction force to the mixer unit is reduced.

In this way, the operability is improved, the ingredients can be uniformly crushed and mixed, and a mixer unit that can make soup and juice with a good texture can be configured.

Also, the check valve structure of the valve body can prevent intrusion of liquid or the like from the mixing chamber into the internal mechanism.

A mixer unit according to a fourth aspect of the present disclosure includes, in the first aspect, a shaft packing having a truncated conical valve body concentric with a rotating shaft whose diameter is reduced from the bearing side toward the partition side. Is.

Also, the valve body configured as described above can prevent liquid and the like from entering the internal mechanism from the mixing chamber.

A hand blender according to a fifth aspect of the present disclosure includes a main body in which a motor is provided, and a mixer unit according to the first aspect.

According to this aspect, the hand pressure blender that can improve the operability by reducing the negative pressure state generated in the mixing chamber during operation and reducing the suction force with respect to the mixer unit, and enables uniform crushing and mixing of food materials. Can be configured.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In all the following drawings, the same or corresponding parts are denoted by the same reference numerals, and redundant description is omitted.

Also, in the following description, when simply expressed as “upper” or “lower”, it means the normal use state of the hand blender, that is, the vertical direction in the state where the mixer unit provided at the tip of the hand blender is turned downward. However, it does not have to be strictly vertically upward or vertically downward.

FIG. 1 is a longitudinal sectional view of a mixer unit according to an embodiment of the present disclosure.

The hand blender having the mixer unit 2 according to the present embodiment has a main body 1 (not shown in FIG. 1), similarly to the conventional hand blender shown in FIG. The mixer unit 2 is detachably attached to the lower end of the main body 1.

As shown in FIG. 1, the mixer unit 2 is formed with a hood 5 that covers the periphery of its tip. The hood 5 is formed of a bell-shaped metal member having an opening below.

The space in the hood 5 is divided into a space in which the internal mechanism 3 is provided and a space in which the mixing chamber 4 is provided by a partition wall 13 having a through hole in the center.

The mixing chamber 4 is provided in a space in the hood 5 from the partition wall 13 to the opening of the hood 5. The internal mechanism 3 is provided concentrically with the rotary shaft 7 in a space in the hood 5 partitioned from the mixing chamber 4 by the partition wall 13, and includes a bearing 8, a bearing packing 9, a shaft packing frame 10, a shaft packing 11, and a fixing ring 12. Including.

The rotary shaft 7 is provided so as to penetrate the center of the internal mechanism 3 and is pivotally supported by the bearing 8. One end of the rotating shaft 7 is connected to a motor (not shown) provided in the main body 1, and the other end of the rotating shaft 7 protrudes from the through hole of the partition wall 13 into the mixing chamber 4.

The crushing blade 6 is a pair of rotating blades extending in the centrifugal direction of the rotating shaft 7, and is fixed to the tip of the rotating shaft 7 by caulking.

The fixing ring 12 is a member that is fixed by caulking to the inner wall of the hood 5 and that reliably installs each member included in the internal mechanism 3 at a predetermined position.

The bearing packing 9 is provided so as to be fitted inside the fixing ring 12 and holds the bearing 8 therein.

2A and 2B are perspective views of the bearing packing 9 in the mixer unit 2 according to the present embodiment. As shown in FIG. 1, FIG. 2A, and FIG. 2B, the groove 9 a is provided on the outer periphery of the bearing packing 9 in the axial direction of the rotating shaft 7. It functions as a ventilation path between.

1, the shaft packing frame 10 is a hard resin member provided below the bearing packing 9 for positioning the shaft packing 11. The shaft packing 11 is sandwiched between the shaft packing frame 10 and the partition wall 13 and seals a gap 13 a provided between the rotary shaft 7 and the through hole of the partition wall 13. The hood packing 14 is held by being fitted to the fixing ring 12 and holds the partition wall 13.

FIG. 3A is a perspective view of the shaft packing 11 in the mixer unit 2 according to the present embodiment. FIG. 3B is a longitudinal sectional view of the shaft packing 11.

As shown in FIGS. 3A and 3B, the shaft packing 11 includes a through hole 11a into which the rotary shaft 7 can be inserted in the center, a sealing portion 11b that surrounds the through hole 11a and contacts the rotary shaft 7, and a sealing portion 11b. A conical trapezoidal valve body 11c that is concentric with the rotary shaft 7 and has a diameter reduced toward the center. Due to the shape of the valve body 11c, the shaft packing 11 functions as a check valve.

The operation and action of the mixer unit configured as described above will be described below.

First, in the present embodiment, the air pressure in the upper space A located on the main body 1 side of the bearing 8, that is, the air pressure in the main body 1 is expressed by the simple configuration of the groove 9 a provided in the bearing packing 9. 8 can be the same as the pressure in the lower space B located on the partition wall 13 side.

Like the conventional hand blender, in order to make vegetable soup using the hand blender according to this embodiment, the mixer unit 2 is pushed into the stewed vegetables in the pan, the power is turned on, and the grinding blade 6 Rotate at high speed.

When the grinding blade 6 rotates at a high speed, a negative pressure state is generated in the vicinity of the rotating shaft 7 in the mixing chamber 4 as in the conventional configuration, and the atmospheric pressure in the mixing chamber 4 becomes lower than the atmospheric pressure in the main body 1. This pressure difference acts as a force for spreading the valve body 11c from the inside and separating the sealing portion 11b from the rotating shaft 7 (see arrow X in FIG. 3B).

As a result, the sealing by the valve body 11c is released, and the air in the main body 1 flows out into the mixing chamber 4 via the upper space A, the groove 9a, the lower space B, and the gap 13a. In this way, the negative pressure state in the mixing chamber 4 is relaxed, and the suction force with respect to the mixer unit 2 is reduced.

As described above, according to the present embodiment, ventilation from the main body 1 to the mixing chamber 4 is performed via the ventilation path (the groove 9a in the present embodiment) provided in the internal mechanism 3 and the shaft packing 11. Done. As a result, the negative pressure state generated in the mixing chamber 4 is relaxed, and the suction force with respect to the mixer unit 2 is reduced.

Thus, the operability is improved, the ingredients can be uniformly crushed and mixed, and the mixer unit 2 capable of making a soup or juice having a good texture can be configured.

In addition, when the atmospheric pressure in the mixing chamber 4 is higher than the atmospheric pressure in the main body 1 for some reason, the atmospheric pressure difference acts on the valve body 11c as a force for pressing the sealing portion 11b against the rotary shaft 7. As a result, the shaft packing 11 can block the fluid (for example, crushed food material) that tends to flow into the internal mechanism 3 from the mixing chamber 4 without releasing the sealing by the valve body 11c.

That is, the shaft packing 11 has a check valve structure that allows air to flow from the main body 1 side to the mixing chamber 4 side and does not allow air to flow from the mixing chamber 4 side to the main body 1 side.

The mixer unit according to the present disclosure can be applied to a blender, a food processor, and the like in addition to a hand blender.

DESCRIPTION OF SYMBOLS 1

Main body

2,52

Mixer unit

3,53

Internal mechanism

4,54

Mixing chamber

5,55

Hood

6,56

Grinding blade

7,57 Rotating shaft 8 Bearing 9 Bearing packing 9a Groove 10 Shaft packing frame 11 Shaft packing 11a Through hole

11b Sealing part

11c Valve body 12 Fixing

ring

13, 61

Partition

13a, 61a Gap 14 Hood packing 58 Bush 59 Bush sleeve 60 Shaft seal

Claims

A mixer unit driven by a motor,
A bell-shaped hood with an opening;
Partitioning the space in the hood and having a through hole;
A mixing chamber provided in a space in the hood from the partition to the opening;
An internal mechanism provided in a space in the hood partitioned from the mixing chamber by the partition;
A rotating shaft provided to penetrate the internal mechanism, one end connected to the motor, and the other end protruding from the through hole into the mixing chamber;
A bearing included in the internal mechanism and supporting the rotation shaft;
A shaft packing included in the internal mechanism, provided concentrically with the rotating shaft between the bearing and the partition wall, and sealing a gap between the through hole and the rotating shaft;
A grinding blade provided on the rotary shaft in the mixing chamber;
With
The internal mechanism is a mixer unit having an air passage that secures air flow between the motor side of the bearing and the bulkhead side of the bearing.
The internal mechanism includes a bearing packing that fixes the bearing, and a fixing ring that is provided on an inner wall of the hood and fixes the bearing packing.
The mixer unit according to claim 1, wherein the air passage is a groove provided in an axial direction of the rotating shaft on an outer periphery of the bearing packing.
The shaft packing allows fluid flowing out from the internal mechanism to the mixing chamber through a gap between the through hole and the rotating shaft, and passes through a gap between the through hole and the rotating shaft. 2. The mixer unit according to claim 1, further comprising a valve body having a check valve structure that blocks fluid flowing from the mixing chamber into the internal mechanism.
The mixer unit according to claim 1, wherein the shaft packing has a truncated cone-shaped valve body concentric with the rotating shaft whose diameter is reduced from the bearing side toward the partition side.
A hand blender comprising: a main body provided with the motor therein; and the mixer unit according to claim 1.