JP3031803U - Coupling device - Google Patents

Abstract

(57) Abstract: A coupling device (1) for connecting a drive-side shaft (2) and a driven-side shaft (3) is made to be compatible with shafts having different sizes. SOLUTION: Cylindrical body parts 6, 7 into which shafts 2, 3 are inserted and fixed
The diameter of can be adjusted. Specifically, the outer peripheries of the tip end portions of the tubular body portions 6 and 7 are tapered surfaces 14 and 15, and slits 16 and 17 are provided at the tip end portions of the tubular body portions 6 and 7, and the tubular body portions 6 and 7 are further provided. Nut members 20, 2 on the outer circumference of 7.
1 is screwed, and the nut members 20 and 21 are rotated to press the tapered surfaces 14 and 15 so that the shafts 2 and 3 are
The structure is to tighten and fix.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a coupling device used for connecting a drive-side shaft and a driven-side shaft.

[0002]

[Prior art]

 In the power transmission mechanism, various types of coupling devices (shaft couplings) are currently used to connect the drive-side shaft and the driven-side shaft in order to absorb eccentricity and inclination of the shaft. in use.

For example, the one shown in FIG. 1 has been incorporated into a dial device by the present applicant and has been registered as a utility model (No. 1390136), and is used by many users.

In FIG. 1, reference numeral 1 denotes a coupling device, which connects a drive-side shaft 2 and a driven-side shaft 3. The coupling device 1 has fixed bodies 4 and 5 which are fixed to shafts 2 and 3, respectively, and the fixed bodies 4 and 5 are connected via a leaf spring member 10.

The fixed bodies 4 and 5 include cylindrical portions 6 and 7 into which the shafts 2 and 3 are inserted and fixed, respectively, and a flange portion 8 formed continuously on the inner end side of the cylindrical portions 6 and 7. 9 and 9 are integrally provided, a leaf spring member 10 is arranged between the flange portions 8 and 9, and the leaf spring member 10 is connected and fixed by a rivet 11.

Screw members 12 and 13 are attached to the tubular portions 6 and 7, respectively, and the shafts 2 and 3 are inserted into the tubular portions 6 and 7 by the screw members 12 and 13, respectively. , 3 is fastened and fixed.

According to the coupling device 1 configured as described above, the driving-side shaft 2 and the driven-side shaft 3 are reliably connected, that is, the rotational driving force of the driving-side shaft 2 is applied to the driven-side shaft. Can be reliably transmitted to the shaft 3, and if there is eccentricity or inclination between the shafts 2 and 3 on both sides, it can be easily absorbed by the leaf spring member 10 flexing appropriately.

[0008]

[Problems to be solved by the device]

 By the way, when the drive-side shaft 2 and the driven-side shaft 3 are connected by such a coupling device 1, the shafts 2 and 3 often have different shaft diameters. It is the current situation that various types of cylinders 6 and 7 into which the shafts 3 and 3 are inserted and fixed have different diameters are prepared, and they are adapted to the shaft diameters of the shafts 2 and 3.

Therefore, conventionally, there have been problems that a large amount of cost is required to prepare many types of coupling devices, and that their management also takes time. The present invention has been made for the purpose of solving such problems.

[0010]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a coupling device used for connecting a shaft on a driving side and a shaft on a driven side, in which the diameter of a cylindrical portion into which a shaft is inserted and fixed is adjusted. It has a structure that makes it possible and can accommodate shafts of different diameters. Specifically, the outer periphery of the tip portion of the tubular portion into which the shaft is inserted and fixed is formed on the taper surface, a slit is provided at the tip portion of the tubular portion, and the outer periphery of the tubular portion is further provided. The structure is made by screwing a nut member, and by rotating this nut member and pressing the tapered surface, the shaft is tightened and fixed.

[0011]

[Embodiment of device]

 Hereinafter, an example which is an embodiment of the present invention will be described in detail with reference to FIG.

In FIG. 2, reference numeral 1 denotes a coupling device according to the present invention, which connects a drive-side shaft 2 and a driven-side shaft 3. The coupling device 1 has fixed bodies 4 and 5 which are fixed to shafts 2 and 3, respectively, and the fixed bodies 4 and 5 are connected via a leaf spring member 10.

The fixed bodies 4 and 5 include tubular portions 6 and 7 into which the shafts 2 and 3 are inserted and fixed, respectively, and a flange portion 8 formed continuously on the inner end side of the tubular portions 6 and 7. 9 and 9 are integrally provided, a leaf spring member 10 is arranged between the flange portions 8 and 9, and the leaf spring member 10 is connected and fixed by a rivet 11.

In particular, the coupling device 1 of the present example has a structure in which the diameters of the cylindrical portions 6 and 7 can be adjusted so as to accommodate shafts having various diameters.

Explaining the specific configuration in detail, first, the outer peripheral surfaces of the tip end portions of the tubular portions 6 and 7 are formed as tapered surfaces 14 and 15, respectively. The tip portion is provided with a plurality of slits 16 and 17 that are cut in the axial direction so that they can be easily deformed.

Further, screw grooves 18 and 19 are formed on the outer peripheral surfaces of the cylindrical portions 6 and 7, respectively, and nut members 20 and 21 for fixing shafts are screwed into the screw grooves 18 and 19, respectively. ing.

The nut members 20 and 21 have holes 20a and 21a that come into contact with and press the tapered surfaces 14 and 15, respectively, that is, when the nut members 20 and 21 are rotatably moved in the backward direction, When the hole portions 20a and 21a press the tapered surfaces 14 and 15, the tubular portions 6 and 7 are deformed so that the diameter of the opening portion becomes narrower, and thus the tubular portions 6 and 7 are inserted into the tubular portions 6 and 7. The shafts 2 and 3 are tightened and fixed.

As described above, in the coupling device according to the present embodiment, the diameters of the tubular portions 6 and 7 into which the shafts 2 and 3 are inserted and fixed can be adjusted, so that the shafts can be used for shafts of different sizes. You can Although brass or the like is generally used as a molding material for the tubular portions 6 and 7, the diameter of the shafts 2 and 3 is changed by using an elastic material such as phosphor bronze for the tubular portions 6 and 7. In that case, it can be easily dealt with.

FIG. 3A shows the case corresponding to the shaft having the maximum shaft diameter, and FIG. 3B shows the case corresponding to the shaft having the minimum shaft diameter. As is apparent here, the bores of the cylindrical portions 6 and 7 are the corresponding shafts. Is set according to the maximum shaft diameter (here, the diameter of the shaft 2 on the drive side), and the minimum adjustable diameter of the cylinders 6 and 7 is the minimum shaft diameter of the planned shaft (the driven shaft here). Diameter of the side shaft 3).

The applicant of the present invention actually manufactured a prototype of the coupling device 1 shown in this example, and was able to handle a wide range of shaft diameters (maximum shaft diameter φ6 mm to minimum shaft diameter φ3 mm). The effectiveness of the present invention has been proved.

[0021]

[Effect of device]

 As is clear from the above description, according to the present invention, one coupling device can absorb the eccentricity and inclination of the shaft, and at the same time, can cope with shafts having various diameters. There is no need to prepare a coupling device, which is a cost advantage and eliminates the problem of management.

[Brief description of drawings]

FIG. 1 is a side view of a conventional coupling device with a partial vertical section.

FIG. 2 is a side view with a partial longitudinal section showing a coupling device according to the present invention.

FIG. 3 is an explanatory view of a fixed state of the shaft, where A is a case corresponding to a shaft having a maximum shaft diameter and B is a case corresponding to a shaft having a minimum shaft diameter.

[Explanation of symbols]

 1 Coupling device 2 axis (driving side) 3 axis (driven side) 6,7 Cylindrical part 14,15 Tapered surface 16,17 Slit 20,21 Nut member

Claims (2)

[Scope of utility model registration request] 1. A coupling device used to connect a drive-side shaft and a driven-side shaft, wherein a diameter of a cylindrical body portion into which the shaft is inserted and fixed is adjustable, and a shaft having a different diameter is provided. A coupling device characterized by a structure that can be used. 2. The outer periphery of the tip portion of the tubular portion into which the shaft is inserted and fixed is formed into a tapered surface, and a slit is provided at the tip portion of the tubular portion, and the nut member is provided on the outer periphery of the tubular portion. 2. The coupling device according to claim 1, wherein the coupling member is configured by screwing, and the nut member is rotated to press the tapered surface to tighten and fix the shaft.