JPH02154Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a shaft connection device for a dehydrator that connects a dehydration shaft of a dehydration basket to a drive shaft of a motor.

[Technical background of the invention]

Conventionally, in this type of shaft coupling device, a drive shaft and a dewatering shaft, each having a flat surface on its outer circumferential surface, are inserted from above and below into a coupling tube with an insulating tube provided on the inner circumference of one side, and each shaft is A screw is inserted into the connecting cylinder corresponding to the flat surface portion to connect both shafts to each other.

[Problems with background technology]

However, with the above configuration, the insertion work of the connecting tube into the drive shaft can be performed while directly checking the tip of the drive shaft, so that the screw insertion part of the connecting tube and the flat surface of the drive shaft can be aligned. Although this is easy, inserting the dehydration shaft into the connecting cylinder fixed to the drive shaft in this way requires holding the dehydration basket and looking into the lower end of the dehydration shaft from above. There was a problem in that it was difficult to align the flat surface portion with the screw insertion portion of the connecting tube, and the workability was extremely poor.

[Purpose of invention]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a shaft connecting device for a dehydrator that can connect the dehydrating shaft of a dehydrating basket to the drive shaft of a motor with good workability.

[Summary of the idea]

The present invention has a positioning part that protrudes inwardly by press working at a part of the upper inner circumferential surface of the shaft insertion hole of the connecting cylinder that corresponds to the fixing screw that is screwed into the connecting cylinder and comes into pressure contact with the flat surface of the dehydration shaft. It is characterized by its formation.

[Example of idea]

An embodiment in which the present invention is applied to a two-tub washing machine will be described below with reference to the drawings. Reference numeral 1 denotes an outer box, inside of which a washing tub 2 and a dewatering tank 3, which are integrally molded from plastic in a side-by-side manner, are disposed. Below the dewatering tank 3, a dewatering motor 4 is elastically supported by the bottom frame of the outer box 1, and its drive shaft 5 projects upward. Reference numeral 6 denotes a dehydration basket rotatably disposed within the dehydration receiving tank 3 , and a dehydration shaft 7 is fixed to the outer bottom of the dehydration basket 6 .
It passes through a bellows 8 provided at the bottom of the shaft and is connected to the drive shaft 5 via a shaft connecting device 9. Hereinafter, this shaft coupling device 9 will be described in detail. Reference numeral 10 denotes a shaft insertion hole 11 through which the drive shaft 5 and the dehydration shaft 7 are inserted.
This is a metal connecting cylinder in which a screw insertion hole 12 and a screw hole 13 passing through in the radial direction are formed in the upper and lower parts of the circumferential wall, respectively, and a brake drum 14 is fixed to the lower end by, for example, welding. There is. 1
Reference numeral 5 denotes an insulating cylinder formed on the inner peripheral surface of the lower half of the shaft insertion hole 11 of the connecting cylinder 10 with a slightly larger diameter. It is formed integrally and has a screw hole 16 on its inner peripheral surface.
is formed. Flat surface portions 5a and 7a are formed on the outer circumferential surfaces of the drive shaft 5 and the dehydration shaft 7, respectively, at a portion near the upper end and a bottom end of the dehydration shaft 7, and the drive shaft 5 and the dehydration shaft 7 are inserted through the shafts of the connecting cylinder 10. Hole 11
The screw holes 16, 1 of the connecting cylinder 10
3, screw the fixing screws 17 and 18 into the respective flat surfaces 5a and 7a, so that both shafts 5 and 7 are pressed against each other.
are connected in an insulated manner via a connecting tube 10.
Reference numeral 19 denotes a positioning protrusion formed on the connecting cylinder 10. This is a positioning protrusion formed on the upper inner circumferential surface of the shaft insertion hole 11 at a portion corresponding to the fixing screw 18, for example, a portion directly above the screw hole 13. It is formed so as to protrude inward at a position below the surface. The positioning protrusion 19 is formed as follows. That is, FIG. 4 shows a press apparatus. In this FIG. 4, 20 is a die plate, 21 is a die holder provided on the die plate 20, and 22 is a forming die installed approximately in the center of the die holder 21. A molding groove 22a is formed in a predetermined portion of the outer periphery near the upper end of the molding die 22, into which the connecting tube 10 is fitted and set in an inverted state. A forming pin 23 projects slightly upward from the die holder 21 along the forming die 22, and has its tip facing directly below the forming groove 22a. Reference numeral 24 denotes a knockout plate provided on the die holder 21, which is pushed up via a pin 26 by a knockout cylinder 25 provided below the die plate 20, and the connecting cylinder 10 after press working is pushed up into the forming die 22.
It is for removing from. 27 is molding die 2
The cylinder for position detection is provided opposite to the molding groove 22a of No. 2, and its tip is formed in a tapered shape so that it can enter into the screw hole 13 of the connecting cylinder 10. After setting it in the forming die 22, it advances to the connecting cylinder 10 side and forming the connecting cylinder 1.
0 connects the screw hole 13 to the molding groove 2 of the molding die 22.
2a, the tip enters into the screw hole 13, and this is detected by a switch (not shown). 28 is a main cylinder, in which the connecting cylinder 10 connects the screw hole 13 with the forming groove 22a of the forming die 22.
When the position detection cylinder 27 is set in a state corresponding to The forming groove 2 is formed by causing plastic deformation in the part that comes into contact with the
2a, thereby positioning protrusion 19
It forms the This process is a type of press process called header process. If the positioning protrusion 19 is formed by press working in this way, it can be formed from the material itself composing the connecting cylinder 10, so no additional material is required.Moreover, pressing can be performed with an extremely short stroke, so it can be formed by pressing. This process can be performed at high speed, has high productivity, and can be formed at low cost overall.

Next, the drive shaft 2 of the motor 4 attached to the bottom frame of the outer box 1 by the shaft coupling device 9 configured as described above.
The procedure for connecting the dehydration shaft 7 will now be described. first,
While looking at the drive shaft 5 of the motor 4, attach the connecting cylinder 10 so that it covers the drive shaft 5 with the screw hole 16 matching the flat surface portion 5a of the drive shaft 5. Thereafter, the fixing screw 17 is screwed into the screw hole 16 and tightened to fix the connecting tube 10 to the drive shaft 5. After that, the dehydration basket 6 is inserted from above into the dehydration receiving tank 3 by holding the upper end of the dehydration basket 6, the dehydration shaft 7 is passed through the bellows 8 and protruded below the dehydration receiving tank 3, and then the dehydration shaft 7 Insert the lower end of the connector into the shaft insertion hole 11 of the connecting cylinder 10. Then, the lower end of the dewatering shaft 7 is slightly inserted into the shaft insertion hole 11 and comes into contact with the positioning protrusion 19, so that insertion of the dehydrating shaft 7 is stopped midway. Here, when the dehydration basket 6 is slightly rotated, the dehydration shaft 7 rotates within the shaft insertion hole 11 of the connecting cylinder 10.
When the flat surface portion 7a of the dehydration shaft 7 matches the positioning protrusion 19, the dehydration shaft 7 is further inserted so as to fall into the shaft insertion hole 11. As a result, the screw hole 13 of the connecting cylinder 10 and the flat surface portion 7a of the dehydration shaft 7 are connected.
matches. Therefore, the fixing screw 1 is inserted into the screw hole 13.
8 is screwed in and tightened, the tip of the fixing screw 18 is securely pressed against the flat surface 7a, and the dewatering shaft 7 can be fixed to the connecting cylinder 10 in a non-rotating state, which in turn drives the dehydrating shaft 7 and the motor 4. It can be connected to the shaft 5. When inserting the dehydration shaft 7 into the connecting tube 10, if the flat surface 7a of the dehydration shaft 7 coincidentally coincides with the positioning protrusion 19, the dehydration shaft 7 can be inserted into the shaft insertion hole 11 without stopping halfway. Because it will be done,
It is sufficient to immediately fix it with the fixing screw 18 in this state.

[Effect of idea]

As described above, the present invention has a very simple operation in which when inserting the dehydrating shaft into the upper part of the connecting cylinder attached to the drive shaft of the motor, if the dehydrating shaft stops mid-insertion, it can be rotated slightly. This allows the flat surface of the dewatering shaft and the fixing screw to be in a secure state of alignment, allowing the connection work to be performed with good work efficiency.Furthermore, since the positioning protrusion is formed on the connection cylinder by press working, it is generally inexpensive. A shaft connection device for a dehydrator that can be manufactured can be provided.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a longitudinal sectional view showing the entire two-tub washing machine, FIG. 2 is an enlarged longitudinal sectional view of the main parts, and FIG. 3 is a perspective view of the connecting tube. FIG. 4 is a longitudinal sectional view of the press device. In the figure, 4 is a motor, 5 is a drive shaft, 6 is a dewatering basket,
7 is a dehydration shaft, 7a is a flat surface portion, 10 is a connecting cylinder, 1
1 is a shaft insertion hole, 18 is a fixing screw, and 19 is a positioning protrusion.

Claims (1)

[Scope of utility model registration request] A dehydration shaft fixed to the outer bottom of the dehydration basket and having a flat surface on its outer circumferential surface is inserted into the shaft insertion hole of the connecting cylinder connected to the drive shaft of the motor, and the fixing screw screwed into the connecting cylinder is inserted into the dehydration shaft. The dehydration shaft is fixed by being brought into pressure contact with the flat surface portion,
A positioning protrusion that protrudes inward at a position downward from the upper end opening surface of the shaft insertion hole is formed by press working on a portion of the upper inner circumferential surface of the shaft insertion hole that corresponds to the fixing screw. Features: Dehydrator shaft connection device.