JP2620561B2 - Rotary shaft connection structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a connection structure of a rotating shaft.

<Conventional Technology> In a home electric appliance, an industrial machine appliance, or a transportation machine such as a vehicle, a connection structure shown in FIG. 18 is seen as a means for connecting one rotating shaft transmitting torque to another rotating shaft. Was done. The first rotating shaft (1) receives a rotating force from an electric motor or the like and supplies the rotating force to another, and the first rotating shaft (1).
To the second rotating shaft (2) which receives the supply of rotational force, a first connecting member (10) provided at the tip of the first rotating shaft and made of plastic or the like, and to the rear end of the second rotating shaft (2). A second provided, made of plastic or the like
It is constituted by the connection member (20).

A plurality of claws (11) are formed at the tip (upper part in the figure) of the first connection member (10), and the claws (11) protrude forward (upper part in the figure). Similarly, a plurality of claws (12) are formed at the rear end (the lower part in the figure) of the second connection member (20), and the claws (12) are formed.
Project rearward (downward in the figure). Each nail (11)
(12) has a rake face (11 ') (1
2 ') is formed (vertically in the figure). The rake faces (11 ') and (12') mesh with each other when the first connecting member (10) and the second connecting member (20) are connected, and transmit the torque (FIG. 19).

<Problems to be Solved by the Invention> However, a connection structure using such a plastic or other connection member generates a large noise due to a high speed or an illegal rotation of a motor. Further, a problem often arises that the rake faces (11 ') and (12') are fused together by ultrasonic fusion.

For this reason, it is conceivable to form the first and second connection members (10) and (20) by a soft member such as rubber. However, such a material is deformed by the high-speed rotation or load of the motor, and the claw (11) The meshing of (12) begins to slip, which significantly reduces the transmission efficiency of the rotational force.

Also, as in the invention described in Japanese Patent Application Laid-Open No. 56-83622, a plurality of leaf springs are superimposed on each other to form a substantially triangular mountain shape or the like. And a device in which a space is formed between leaf springs so as to be more easily elastically deformed.

However, in this case, since the entire mountain-shaped claw is constituted by a large number of leaf springs, the degree of elastic deformation between the crest top and the base is not uniform. Therefore, the rotation force cannot be uniformly received by the entire nail, and local fatigue is likely to occur, and the nail may be disengaged.

Thus, the present invention can prevent the occurrence of noise and ultrasonic fusion, and can evenly receive the rotational force on the entire nail, so that local fatigue and disengagement of the nail are less likely to occur. No rotary shaft connection structure is provided.

<Means for Solving the Problems> The present invention provides a first rotating shaft (109) and a first rotating shaft (10).
9) a first connection member (110) provided at the front end, and a second connection member whose rear end engages the front end of the first connection member (110).
A first rotating shaft (109) including a connecting member (105) and a second rotating shaft (104) provided at a tip of the second connecting member (105);
By providing a rotating shaft connection structure having the following configuration, the rotation of which is transmitted to the second rotating shaft (104) via the first and second connecting members (110) and (105), To solve the problem.

In the rotating shaft connection structure according to the present invention, an appropriate number of claws (106 ') are provided at the tip of the first connecting member (110) along the circumferential direction of the rotating shaft, and the second connecting member (105) is provided. An appropriate number of claws (106) are provided at the rear end along the circumferential direction of the rotating shaft, and the claws (106) of the first and second connection members (110) and (105) are provided.
The rotation is transmitted by the meshing of (106 '). Each of the claws (106) (106 ') has a meshing surface extending from the top to the base of the claws (106) (106') substantially in parallel with the axial direction of the rotating shaft, and a claw (106) ( 1
It forms a substantially mountain shape defined by the slope connecting the bottom of 06 '). The hollow extending substantially parallel to the axial direction of the rotation shaft only on the engagement surface of the claw (106 ') of at least one of the first and second connection members (110) and (105). Elastically deformable flexible part (200) with part (300)
Is formed, and a gap (210) is formed between the base end of the flexible portion (200) including the hollow portion (300) and the bottom of the adjacent claw (106 '). The hollow portion (300) penetrates from the top to the base of the flexible portion (200) constituting the meshing surface.

<Operation> In the present invention, since the elastically deformable flexible portion (200) is deformed only on the meshing surface that directly transmits the rotational force, the flexible portion (200) is rotated during rotation. Only the shape is deformed, and this deformation is absorbed by the hollow portion (300), so that noise and ultrasonic fusion can be prevented. Moreover, the meshing surface extends from the top to the base of the claw (106 ') substantially in parallel with the axial direction of the rotating shaft, and a rotational force is applied to the flexible portion (200) formed on the meshing surface. Are added uniformly throughout. The hollow portion (300) formed in the flexible portion (200) also extends substantially parallel to the axial direction of the rotating shaft, and the deformation of the flexible portion (200) is different from that of the hollow portion (300). Is performed uniformly. In particular, the proximal end of the flexible portion (200) including the hollow portion (300) and the adjacent claw (10
Since the gap (210) is formed between the hollow portion (300) and the bottom of the flexible portion (200) constituting the meshing surface, the gap (210) penetrates from the top to the base of the flexible portion (200). The deformation can be uniform from top to base.

<Example> An example of the present invention will be described below with reference to the drawings.

First, the configuration around the flexible portion (200) and the hollow portion (300), which is the center of the present invention, will be described with reference to FIGS. 1 and 2 (in FIG. 1 and FIG. 2, the flexible portion (20
0) and the hollow portion (300) are connected to the claws (1) of the first connection member (110).
06 '), these may be provided on the claws (106) of the second connection member (105), which will be described later, or may be provided on the claws (106) of both connection members (110) and (105). 106) and (106 ') can be implemented).

FIG. 1 shows a first connection member (110) having a claw (106 ') provided with a flexible portion (200) and a hollow portion (300). An appropriate number of claws (106 ') protrude from the upper surface.

Hereinafter, the entire configuration will be described in detail. A first rotating shaft (10) that receives torque from an electric motor or the like and supplies the torque to others.
9), a second rotating shaft (104) receiving a supply of rotational force from the first rotating shaft (109), and a second rotating shaft (104) provided at the tip of the first rotating shaft (109) and formed of a material having an appropriate hardness. 1
A connecting member (110), a second rotating shaft (104) provided at a rear end of the second rotating shaft (104) and formed of a material having an appropriate hardness;
And a connection member (105).

At the tip (upper part in the figure) of the first connection member (110),
A plurality of claws (106 ') are formed, and the claws (106') project forward (upward in the figure). Similarly, the second connecting member (10
5) A plurality of claws (106) are also formed at the rear end (the lower part in the figure), and the claws (106) protrude rearward (the lower part in the figure). Each of the claws (11) and (12) has a rake face (vertical in the figure) for meshing with each other. The rake faces mesh with each other when the first connection member (110) and the second connection member (105) are connected, and transmit the rotational force.

The pawl (106 ') is connected to the pawl (106') of the second connecting member (105).
A vertical engaging surface (the above-mentioned rake surface) is provided from the top to the base in order to engage with the flexible portion (20).
0). Further, a vertical hollow portion (300) is formed inside the claw (106 ') from the top to the base. Therefore, the hollow part (300) is included in the flexible part (200).
Is located. In addition, like the claws in the normal rotation shaft connection structure, the claws (106) (106 ') of the first and second connection members are
The engaging surface extends from the top to the base of the pawls (106) and (106 ') substantially in parallel with the axial direction of the rotating shaft, and the slope connecting the top of the engaging surface to the bottom of the adjacent pawl (106) (106'). As described above, in this embodiment, the claw (10) of the first connection member (110) is formed as described above.
The flexible portion (200) is provided on the mating surface of 6 ′),
The engaging portion of the hook (106 ') of the connecting member (105) is not provided with the flexible portion (200) as in the usual case.

The first connection member (110) is formed entirely of a plastic or the like having an appropriate hardness and elasticity enough not to impair its independence.

The flexible portion (200) forms a thin portion due to the presence of the adjacent hollow portion (300). This allows the second
As shown in the figure, the second connecting member (105) and the first connecting member (110) are connected, and when the pawl (106) and the pawl (106 ') are engaged, the torque is applied to the flexible portion (200). ) Bends, and the hollow portion is crushed by this deformation. The flexible portion (200) returns to its original state depending on whether the rotation stops and the torque is deenergized or the connection portions (110) and (105) are separated.

FIG. 3 shows that the flexible portion (20) is provided on the second connecting member (105) side.
0) and a connection state of the first connection member (110) and the second connection member (105) as viewed from the front using an example in which the hollow portion (300) is formed.

A notch (210) is formed in the base of the pawl (106 ') so that the above-mentioned flexible portion (200) can be sufficiently bent.

Therefore, the hollow portion (300) is formed so as to penetrate from the top of the nail (106 ') to the notch (210).

FIG. 4 shows the hollow portion (300) in a plan view. In FIG. 4, the hollow portion (300) is shown to have a substantially circular inner peripheral surface in cross section. However, the shape is not limited to a perfect circle, and may be an ellipse or an ellipse. Alternatively, the present invention can be implemented even with a polygon.

5 and 6 are enlarged views of the configuration near the hollow portion (300) in FIG. In FIG. 5, the nail (106 ') and the nail (1
06) are engaged with each other, and no rotational force is applied. FIG. 6 shows a state where a rotational force is applied. As shown in FIG. 6, the hollow portion (300) is crushed and undergoes deformation of the flexible portion (200).

FIG. 7 shows another embodiment. This is the flexible part (200)
Is flattened, and accordingly, the hollow portion (300) is also formed in a substantially semicircular cross section.

In this embodiment, the rake face of the nail (106) is centered on the top (2
20) is formed in a raised shape.

FIG. 8 shows a state in which a rotational force is applied to the flexible portion (200) in FIG. 7, that is, a state in which the flexible portion (200) is deformed.

FIG. 9 shows another embodiment. This is the same as the embodiment shown in FIG. 5 except that a cutout portion (230) is provided. The notch is located at the center of the rake face of the flexible portion (200), and further facilitates deformation of the flexible portion (200).

FIG. 10 shows still another embodiment. This is to retract the flexible portion (200) so that the cross section of the hollow portion (300) becomes crescent-shaped in a state where no rotational force is applied,
A notch (230) is provided at the center of the flexible portion (200).

In the case of the embodiment shown in FIG. 10, the rake face of the claw (106) also needs to be formed so as to have a top (220) (not shown).

FIG. 11 shows still another embodiment. This is a nail (10
6 ') rake face, flexible part (200), generally U-shaped in plan view
Is fixed to the rake face of the nail (106 '),
The other leg forms a new rake face. In this case, U
A hollow part (300) between the legs of the flexible part (200)
Becomes In response to the torque from the pawl (106),
1 shows a state in which the flexible portion (200) is bent.

In the case of the embodiment shown in FIG.
However, in this case, as in the case of the above-described embodiment, the embodiment can be performed by integrally molding the claw (106 ').

FIG. 13 shows another embodiment. In this method, an appropriate number of projections are projected from the rake face of the nail (106 '), and these projections are used as flexible portions (200). In this embodiment, the portion of the hollow portion (300) or flexible portion (200) that undergoes deformation is between each protruding flexible portion (200);
Upon receiving the rotational force, the flexible portion (200) bends as shown in FIG.

Flexible part (200) raised from FIG. 5 to FIG.
Each embodiment of the hollow portion (300) has been described as viewed from the same direction as FIG. 4, that is, as viewed in plan. In these embodiments, the illustration of the view (front view) viewed from the direction shown in FIG. 3 is omitted, but it is substantially the same as the embodiment shown in FIG. 3, and the hollow portion (300) is It penetrates between both side surfaces of the nail (106 '). Similar to the embodiment shown in FIG. 11, in the embodiment shown in FIGS. 5 to 10 and 13, the flexible portion and its vicinity are formed of a separate material such as a metal spring and attached to the connection member. Is also good. In this case, the portion indicated by the spots in the embodiment of FIG. 5 is made of a different material.
In the embodiment shown in FIGS. 13 and 13, this portion may be made of another material. In the embodiment shown in FIG.
(106 ') lists four members each, but the number of claws (106) and (106') of each connecting member is not limited to four.
More than one or less than four can be implemented.

The present application can be implemented in various household electrical appliances, industrial machinery, transportation machines, and the like, but can also be implemented in a grinder such as a food mill or a coffee mill. The following is an example of a mill suitable for carrying out the present application.

As the electric mill, the one shown in FIG. 15 is generally used. This is a transparent separate container (10
1) is placed, and a transparent separate cover (102) is covered on the container (101).

FIG. 16 is a partially cutaway front view. Container (101)
Has a rotary blade (103) for grinding beans at the inner bottom, and one end of a shaft (104) of the rotary blade (103) projects downward from the bottom surface of the container (101). One end of the shaft (104) has a short cylindrical second connecting member (105), and the second connecting member (105)
Has an appropriate number of claws (106) 0 formed on the bottom surface. A receiving recess (108) capable of receiving the bottom (107) of the container (101) is formed in an upper portion of the main body (100).
From the center of the inner bottom surface of this concave portion (108),
The rotation axis (109) of the motor (111) inside the main body (100) protrudes. A first connection member (110) connected to the second connection member (105) of the container (101) is provided at the tip of the rotating shaft (109). Like the second connection member (105), the first connection member (110) has an appropriate number of claws (106 ') on the upper surface.
The pawl (106 ') and the pawl (106) of the second connection member (105) are engaged with each other, and the rotational force from the motor (111) is transmitted from the rotary shaft (109) to the rotary blade (104). 103) (FIG. 17 shows a perspective view of the main body (100)).

At an appropriate position on the upper edge of the main body (100), one end of a hole (115) communicating with the inside of the main body (100) is opened. This hole (11
A sliding rod (114) is provided inside 5), and the end of the sliding rod (114) is hit (116) in the opening (117) inside the hole (115).
Facing the outside from near. When an external force is applied to the contact (116), the sliding rod (114) slides into the main body (100), and short-circuits the power supply to the motor (111).

On the other hand, a pressing claw (118) protrudes downward from the edge of the cover (102).

After storing the addenda such as beans in the container (101), the container (10
1) Insert the bottom (107) into the receiving recess (108),
0) and the container (101) are connected. For this connection,
The engagement of the first connection member (110) and the second connection member (105) is performed simultaneously. That is, the claw (1) of the first connection member (110)
06 ') and the claws (106) of the second connecting member (105) mesh with each other.

Container (101) after connecting container (101) to body (100)
Cover (102) from above. This cover (102)
By pressing down on the hand with the hand, the pressing claw (11
8) The hit (116) can be pushed in and the power can be turned on.

Such a coffee mill is located at the bottom (1
07) is detachable from the container (101), is provided with a rotary blade (103), and as a bottom lid of the container (101), beans are stored in the container (101) and then sealed.

To the above-mentioned claw (106) (106 '), the above-mentioned flexible part (200)
And if the hollow part (300) is also provided, the effect of the present invention can be obtained also in the electric mill.

<Effects> As described above, the present invention can prevent the occurrence of noise and ultrasonic fusion, and can evenly receive the rotational force on the entire nail, so that local fatigue and disengagement of the nail are less likely to occur. Thus, it is possible to provide the rotating shaft connection structure described above.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part near a connection member, and FIG. 2 is an explanatory view showing a connection state. FIG. 3 is a main part front view showing a connection state of the first connection member (110) and the second connection member (105) shown in FIGS. 1 and 2, and FIG. 4 is a first connection member. It is a top view of (110). FIG. 5 shows the fourth
Flexible part (200) and hollow part (300) of the embodiment shown in the figure
FIG. 6 is an explanatory view showing a main part showing a configuration in the vicinity, and FIG. 6 is an explanatory view showing a state in which a rotational force is applied to the flexible portion (200). FIG. 7 is an explanatory view of a main part showing another embodiment, and FIG. 8 is an explanatory view showing a state where a rotational force is applied to the flexible portion (200). FIG. 9 is an explanatory view of main parts showing another embodiment, and FIG. 10 is an explanatory view of main parts showing still another embodiment. FIG. 11 is an explanatory view of a main part showing still another embodiment, and FIG. 12 is an explanatory view showing a state in which a rotational force is applied to the flexible portion (200). FIG. 13 is an explanatory view of a main part showing still another embodiment, and FIG. 14 is an explanatory view showing a state where a rotational force is applied to the flexible portion. FIG. 15 is an overall perspective view showing the appearance (common) of a mill suitable for carrying out the present invention, and FIG. 16 is a partially cutaway front view of the mill.
FIG. 17 is a perspective view showing the main body of the mill shown in FIGS. 15 and 16. FIG. 18 is a perspective view showing a conventional connection structure, and FIG. 19 is an explanatory view showing this connection state. (105) ... second connection member, (106) (106 ') ... claw,
(110) First connection member, (200) Flexible part, (30
0)… hollow part.

Claims (1)

(57) [Claims] A first rotating shaft (109) and a first rotating shaft (109).
A first connecting member (110) provided at the front end of the first connecting member, a second connecting member (105) whose rear end engages the front end of the first connecting member (110), and a second connecting member (105). A second rotating shaft (104) provided at the tip, and rotation of the first rotating shaft (109) is controlled by the second rotating shaft (104) via the first and second connecting members (110) and (105). In the rotating shaft connection structure, an appropriate number of claws (106 ') are provided at the tip of the first connecting member (110) along the circumferential direction of the rotating shaft, and the second connecting member (10
5) At the rear end, an appropriate number of claws (106) are provided along the circumferential direction of the rotating shaft, and the claws (106) (106 ') of the first and second connecting members (110) (105). Rotation is transmitted by meshing with each other, and each claw (106) (106 ') extends from the top to the base of the claw (106) (106') substantially in parallel with the axial direction of the rotation shaft. And the claw (106) (10
6 ') and a slope connecting the bottom to the bottom of the first and second connecting members (110) and (105). ) Only on the mating surface of the hollow part (30
0), an elastically deformable flexible part (200) is formed, the base of the flexible part (200) including the hollow part (300),
A gap (210) is formed between the bottom of the adjacent claw (106 ') and this hollow portion (300) penetrates from the top to the base of the flexible portion (200) constituting the meshing surface. A rotating shaft connection structure characterized in that: