JPH0319614Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a hub fixing device used as a part of a shaft coupling.

2. Description of the Related Art A conventional hub fixing device of this type is shown in FIG. This hub fixing device is
There is a shaft hole 2 in the center of the disk surface that makes up the main body of the hub 1X.
A deformed elongated hole 3 in the axial direction is provided through the shaft hole 2 and the circumferential edge of the disk surface, and a circular hole is arranged oppositely on the left and right, and the two circular holes are connected through a communicating hole.
A screw hole 5 is provided which communicates with the center bottom surface 4 of the deformed elongated hole 3 from the periphery of the disk surface. The hub 1X according to this embodiment is fitted onto a shaft 11 for a desired purpose through the shaft hole 2, and a screw 6 is screwed into the screw hole 5 communicating with the deformed elongated hole 3. By tightening, a part of the disk surface located between the central bottom surface 4 and the shaft hole 2 on this side is strongly pressed against the surface of the shaft 11 on this side by the pressing force of the screw 6, so that the shaft hole 2 2
The shape of the hub 1X is deformed into a compressed form within the elastic limit.
is fixed to the shaft 11.

Problems to be Solved by the Invention Due to the above configuration, the conventional hub fixing device has the following problems.

(1) When fixing hub 1 Because the hub is constrained to a specified ratio, it is not possible to use one type of hub in common with multiple types of rotating shafts with different diameters.

(2) As a result of the above, it was necessary to constantly stock many types of hubs with different thicknesses to match the various types of rotary shafts with different diameters, which resulted in high costs due to the large number of storage locations and parts management. .

Means for Solving the Problems This invention solves the problems of the prior art described above, and the thickness of the disk surface located between the center bottom of the deformed elongated hole and the shaft hole is the diameter of the shaft hole and the screw thread. Effective fixation of the hub is guaranteed even if the above thickness changes by cutting and enlarging the diameter of the shaft hole, without being limited by the diameter of the hole.
As a result, it is an object of the present invention to provide a hub fixing device that allows one model of hub to be commonly used for multiple models of rotating shafts with different diameters, thereby reducing costs. The feature of this hub fixing device is that a shaft hole is provided through the center of the disk surface, and a deformed long hole in the shape of a letter is connected to the front and rear surfaces of the disk surface between this shaft hole and the periphery of the disk surface. In the hub fixing device, the hub fixing device is provided with a screw hole that is bored parallel to the disk surface and communicates with the center bottom of the deformed elongated hole from the periphery of the disk surface, and the deformed elongated hole is provided in the disk surface between the shaft hole and the deformed elongated hole. On the left and right surfaces adjacent to both ends of the elongated hole, circular holes parallel to the shaft hole are arranged, and a pair of left and right approximately V-shaped dividing grooves are formed, which communicate from each round hole to the shaft hole.
A portion of the shaft hole is formed between the left and right grooves of the split groove so as to remain as an intermediate hole surface parallel to the central bottom surface of the deformed elongated hole.

Function When using a hub with the above configuration, fit the shaft hole of the hub to the shaft for the desired use, and screw the screw that reaches the center bottom of the deformed elongated hole from the screw hole provided on the outer periphery of the hub. When inserted and tightened, the pressing force will act as a pressing force in the direction of the shaft hole on the intermediate hole surface between the split grooves located directly below. At this time, since the intermediate hole surface is a part of the shaft hole, the shaft hole has been reduced in diameter to a deformed shape by the amount that the intermediate hole surface has moved inward from the normal circumferential surface of the shaft hole. Become. As a result, a shaft for a desired purpose inserted into the shaft hole can be fixed smoothly, easily, and reliably by the modified diameter reduction of the shaft hole.

Embodiments Hereinafter, embodiments of this invention will be described based on the accompanying drawings. Note that the same reference numerals are used for parts that are the same as or correspond to those in the prior art.

FIG. 1 shows a hub fixing device according to an embodiment of this invention. That is, this device has a shaft hole 2 penetrating through the center of the disk surface that is the main body of the hub 1,
Between this shaft hole 2 and the periphery of the disc surface, a deformed elongated hole 3 in the shape of a single letter is bored in parallel with the shaft hole 2, communicating with the front and rear surfaces of the disc surface, and a deformed long hole 3 is formed from the periphery of the disc surface. In the hub fixing device which is provided with a screw hole 5 communicating with the central bottom surface 4 of the hole 3, the following split groove 7 is formed on the disk surface between the shaft hole 2 and the deformed elongated hole 3. This dividing groove 7 is constructed as follows. In other words, this groove 7 is
On the left and right surfaces adjacent to the circular holes drilled at both ends of the deformed elongated hole 3, circular holes with a diameter somewhat smaller than the circular holes are arranged parallel to the shaft hole 2, A pair of left and right substantially V-shaped dividing grooves 7 are formed which communicate from each of the perfect circular holes to the shaft hole 2. In this case, a portion of the shaft hole 2 is configured to remain between the left and right grooves of the split groove 7 as an intermediate hole surface 8 parallel to the central bottom surface 4 of the deformed elongated hole 3. This intermediate hole surface 8 is formed by a split groove 7 when the shaft hole 2 is cut and enlarged to match the shaft diameter of the desired application.
Unless the right and left perfect circular grooves disappear, they are configured to remain as a part of the shaft hole 2. Therefore, when the hub 1 is in use, the effective cutting diameter 2n of the shaft hole 2 is configured to be from the original diameter of the shaft hole 2 to a position immediately before reaching the left and right circular holes of the split groove 7.

6 shown in FIG. 1 can be screwed into the screw hole 5 to apply a pressing force to the central bottom surface 4 of the deformed elongated hole 3 in the direction of the shaft hole 2, so that the intermediate hole surface 8 between the split grooves 7 can be returned to the radial direction. This is a screw for moving the shaft hole 2 to thereby deform the shaft hole 2 into a diameter-reduced shape. Further, reference numeral 9 denotes a mounting hole drilled in the axial direction at opposing positions on the disc surface of the hub 1, in order to indirectly connect the two hubs 1, 1 through the interposition of a spring plate 16 of an intermediate joint 12, which will be described later. It is a screw hole. On one side of the mounting screw hole 9, a supporting convex portion 10 protruding from the disc surface of the hub 1 is provided to protrude in the axial direction so as to be concentrically arranged with the screw hole 9 at each position.

Further, 12 is the same two hubs 1 as described above,
Recesses 1 are arranged concentrically between the holes 1 and 1 on the same radial line of the disk surface at equal intervals with respect to the hole 13 at the center position.
This is an intermediate joint formed by installing a mounting screw hole 14 with a number 5 through it. (See Fig. 2) Note that the reference numeral 16 is fixed to the front and rear surfaces of the intermediate joint 12 by the bolts 18 of the intermediate joint 12, and applies rotational force to the hubs 1, 1 disposed at the front and rear of the outside in the axial direction. These are two spring plates of the same shape formed on a substantially rectangular frame plate that serves as a transmission plate. Attachment holes 17 are provided in the four corner surfaces of each spring plate 16. Reference numeral 19 denotes a bolt for connecting each spring plate 16 described above to the hub 1 on each side thereof. (See Figures 3 and 4) When the hub 1 with the above configuration is used to assemble it to a shaft joint, both hubs 1, 1 are assembled as shown in Figure 4.
After arranging the intermediate joint 12 in between and abutting the spring plates 16 on the front and rear surfaces thereof, the bolts 18 are inserted and tightened from the respective mounting holes 17 at opposing positions into the mounting screw holes 14 at each position. stick. In this case, the above-mentioned front and rear bolts 18 are installed so as to be offset by 90 degrees. Further, bolts 19 are inserted in advance outward into both mounting holes 17 of the spring plate 16 facing each other, where the bolts 18 are not located.

In this embodiment, the hubs 1, 1 are brought into concentric contact with the front and back positions of the intermediate joint 12 in such a manner that they are both deviated by 90 degrees, and then each of the bolts 19 is
By screwing the screws into the mounting screw holes 9, 9 of the hub 1 on each side and tightening them, a shaft joint can be formed as a single unit. (See Figure 4) When using the shaft coupling described above, insert the input shaft (not shown) into the shaft hole 2 of the hub 1 located on either the front or rear, and screw it into the screw hole 5 from the outer periphery. When the screw 6 is screwed, the screw 6
After the tip comes into contact with the center bottom surface 4 of the deformed elongated hole 3, the pressing force acts on the intermediate hole surface 8 located between the split grooves 7 to move it toward the shaft hole 2 side. . At that time, the top of the intermediate hole surface 8 is the center bottom surface 4 of the elongated hole 3 where the left and right circular holes of the split groove 7 are deformed.
Since it is located close to the central bottom surface 4 above,
The pressing force acting on the hole directly acts on the intermediate hole surface 8 from the above-mentioned top portion without attenuation.

Therefore, due to the above pressing force, the intermediate hole surface 8 is pressed against the shaft hole 2.
move in the direction of the inner diameter. In this case, the intermediate hole surface 8
is a part of the shaft hole 2, so the shaft hole 2 is moved by the amount that the intermediate hole surface 8 moves in the inner diameter direction of the shaft hole 2.
This means that the diameter has been reduced to a deformed shape. Thereby, the input shaft inserted into the shaft hole 2 can be fixed smoothly, easily and reliably by the deformative diameter reduction of the shaft hole 2. By the above method, the output shaft (not shown) inserted into the shaft hole 2 of the hub 1 located on the other side can also be fixed in a similar manner.

In addition, when using the hub 1, if the diameter of the shaft hole 2 differs from the shaft diameter for the desired use, the diameter of the shaft hole 2 is enlarged by cutting. Split groove 7 formed between long holes 3
is shortened by cutting and expanding the diameter of the shaft hole 2 to the parts close to the right and left perfect circular holes adjacent to both ends of the deformed long hole 3, and the thickness between the central bottom surface 4 of the deformed long hole 3 and the shaft hole 2 changes. However, since a portion of the shaft hole 2 remains in the same manner at the true left and right circular holes of the split groove 7, the screw 6 is helically tightened against the central bottom surface 4 of the deformed elongated hole 3. At this time, the hub 1 can be smoothly, easily and reliably fixed to a shaft for a desired application in a state similar to that of the original hub 1 in which the diameter of the shaft hole 2 is not expanded by cutting.

Effects of the invention This invention has a shaft hole penetrated through the center of the disc surface, and a deformed long hole in the shape of a letter that communicates with the front and rear surfaces of the disc surface between the shaft hole and the periphery of the disc surface, parallel to the shaft hole. In the hub fixing device, the hub fixing device is provided with a screw hole which is bored in the shape of a shape and communicates from the periphery of the disk surface to the deformed elongated hole and the central bottom surface, and the deformed elongated hole is provided in the disk surface between the shaft hole and the deformed elongated hole. A pair of left and right approximately V-shaped grooves are arranged on the left and right surfaces adjacent to both ends of the groove, and a pair of left and right grooves are formed in the shape of a V, which communicate from each of the circular holes to the shaft hole. A part of the shaft hole is formed between the left and right grooves so as to remain as an intermediate hole surface parallel to the central bottom surface of the deformed elongated hole. Therefore, when a shaft for a desired purpose is inserted into the shaft hole of the hub, the screw in the screw hole is spirally applied, and a pressing force is applied to the center bottom of the deformed elongated hole.
The shaft can be fixed smoothly and easily and reliably without damaging the shaft through the intermediate hole surface, which has been deformed into a diameter-reduced shape. This exists regardless of the modification, so by expanding the diameter of the shaft hole by cutting to the effective cutting diameter at the position where the left and right round holes of the split groove remain, the hub based on this invention can be made common to many models of rotating shafts with different diameters. This eliminates the need to always keep in stock many types of hubs with different shaft holes, which saves on inventory locations and parts management for the hubs, which can significantly reduce costs. There is an effect.

[Brief explanation of drawings]

Figure 1 is a front view of a hub equipped with the fixing device of this invention, Figure 2 is a perspective view of an intermediate joint placed between both hubs when the hub is used, Figure 3 is a perspective view of the same spring plate, FIG. 4 is a plan view of a shaft joint constructed by arranging the same hub, and FIG. 5 is a front view showing a conventional hub. Explanation of symbols, 1, 1X...hub, 2...shaft hole,
2n...Effective cutting diameter, 3...Deformed long hole, 4...Central bottom, 5...Screw hole, 6...Screw, 7...Split groove, 8...Intermediate hole surface, 9, 14...Mounting screw hole,
10... Supporting convex portion, 11... Shaft, 12... Intermediate joint, 13... Hole, 15... Recess, 16... Spring plate, 17... Mounting hole, 18, 19... Bolt, a
……thickness.

Claims (1)

[Scope of utility model registration request] A shaft hole 2 is penetrated through the center of the disc surface, and a deformed long hole 3 in the shape of a letter is bored parallel to the shaft hole 2 between the shaft hole 2 and the periphery of the disc surface and communicating with the front and rear surfaces of the disc surface. In the hub fixing device, the hub fixing device is provided with a screw hole 5 that communicates from the periphery of the disc surface to the center bottom surface 4 of the deformed elongated hole 3, in which the deformed On the left and right surfaces adjacent to both ends of the elongated hole 3, circular holes parallel to the shaft hole 2 are arranged, and a pair of left and right approximately V-shaped dividing grooves 7 are formed, which communicate from each round hole to the shaft hole 2. , the dividing groove 7
A part of the shaft hole 2 is formed between the left and right grooves of the deformed elongated hole 3.
A hub fixing device characterized in that it is formed so as to remain as an intermediate hole surface 8 parallel to a central bottom surface 4 of the hub.