JPH0635709U - Gear device - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] The present invention relates to a gear device, in which a tooth surface of a gear has a tapered surface so that the position of the tooth body is changed when the gear body is moved in the axial direction to be engaged and disengaged. An object of the present invention is to provide a gear device that can be smoothly meshed even in such a state. [Structure] A pair of gears 1 which are axially engaged and disengaged from each other.
Tapered surfaces 3 and 5 that reduce the thickness of the tooth bodies from the central portion in the circumferential direction of the tooth bodies 2 and 4 to the end portions in the circumferential direction are provided on the side surfaces of the tooth bodies of A and 1B on the undock side. Configured to form.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a gear device, for example, a gear device having a gear in which one of a pair of gears moves in the axial direction to engage and disengage from the other gear.

[0002]

[Prior art]

 2. Description of the Related Art Generally, a gear device that moves a gear in a fixed position by moving another gear in the axial direction to remove the gear is widely used in electrical equipment, machine tools, and the like. Conventionally, the gear used in such a gear device is a normal spur gear, and the tooth thickness of the gear is uniform in the circumferential direction, and there has not been any gear that takes into consideration the engagement / disengagement.

[0003]

[Problems to be solved by the device]

 However, when the conventional spur gear is used for the disengagement mechanism in this way, when one gear moves in the axial direction and tries to mesh with the other gear, the flat surfaces of the side surfaces of the tooth bodies of the two gears are in contact with each other. However, there is a problem in that they may come into contact with each other and the meshing operation may not be performed smoothly.

The present invention has been made in view of the problems of the prior art described above, and by providing a tapered surface in the circumferential direction on the side surface of the gear on which the teeth are engaged and disengaged, the position of the teeth is reduced. An object of the present invention is to provide a gear device that can smoothly engage and disengage gears even in such a state.

[0005]

[Means for Solving the Problems]

 According to the present invention, the thickness of the tooth body is reduced from the circumferential center portion of the tooth body toward the circumferential end portion on the side surface of the tooth body of the pair of gears that are axially engaged and disengaged from each other. It is characterized in that a taper surface is formed so that

[0006]

In the present invention, when one gear to be disengaged from each other moves in the axial direction and meshes with the other gear, even if the side surfaces of the teeth come into contact with each other, the tapered surfaces cause the side surfaces of the mating tooth bodies to come into contact with each other. The push gear can be shifted in the circumferential direction in the rotational direction so that it can mesh smoothly.

[0007]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 are views showing a first embodiment of the gear device 100 according to the present invention, and FIG. 6 is a view showing a second embodiment of the present invention.

First, the configuration will be described. In FIG. 1, the gear device 100 is configured so that one gear 1A of a pair of gears 1A and 1B meshing with each other moves in the axial direction A and can be engaged with and disengaged from the other gear 1B at a position P shown by a chain line. Has become. Further, the gear 1A at the position Q shown by the chain line is also moved in the axial direction B so that the gear 1B can be disengaged from the gear 1B at the position P shown by the chain line.

FIG. 2 shows the configuration of meshing of the gears 1A and 1B of the gear device 100. In FIG. 2, the tooth body 2 of the gear 1A has a shape in which tapered surfaces 3 are formed on both side surfaces of the tooth body 2. Further, the tooth body 4 of the gear 1B also has taper surfaces 5 and 5 on both side surfaces of the tooth 4 as in the gear 1A. As shown in FIGS. 3 and 4, the tapered surfaces 3 and 5 have the largest thickness at the central portions of the tooth bodies 2 and 4 in the circumferential direction, and the thickest at both circumferential end portions of the tooth bodies 2 and 4. Is shaped to be small.

Next, the operation will be described. According to the present invention, in FIG. 1, when the gear 1A moves in the axial direction A and meshes with another gear 1B, the tapered surface 3 of the tooth body 2 of the gear 1A and the tapered surface 5 of the tooth body 4 of the gear 1B. Even if they come into contact with each other, as shown in FIG. 5, the tapered surfaces 3 and 5 push each other's tooth bodies in the circumferential direction C to shift the gears in the rotational direction, so that they can be smoothly meshed with each other.

FIG. 6 shows a second embodiment of the gear according to the present invention, in which the tapered surfaces 3 and 5 are formed so as to have a thickness protruding to both sides of the body portion 6 of the gears 1A and 1B. Is.

In the above-described embodiment, the tapered surfaces 3 are formed on both side surfaces of the tooth body 2. However, when the attachment / detachment is performed only from one direction, only one surface on the contact side is contacted. Needless to say, the tapered surface 3 may be formed on the surface. Further, the tapered surface may be a curved surface.

[0013]

[Effect of device]

 As described above, according to the present invention, by providing the side surface of the tooth body of the gear with the tapered surface, the gear can be smoothly meshed when the gear is disengaged regardless of the position of the tooth. .

[Brief description of drawings]

FIG. 1 is a front view of a gear device according to the present invention.

FIG. 2 is a side view of a main part of the embodiment shown in FIG.

FIG. 3 is a perspective view of a main part of the embodiment shown in FIG.

4 is a sectional view taken along the line III-III of FIG.

5 is a cross-sectional view showing a state just before meshing of the embodiment shown in FIG.

FIG. 6 is a sectional view showing another embodiment of the gear device according to the present invention.

[Explanation of symbols]

 1A, 1B Gears 2,4 Tooth bodies 3,5 Tapered surface 100 Gear device

Claims (1)

[Scope of utility model registration request] 1. The wall thickness of the tooth body is reduced from the circumferential center portion of the tooth body toward the circumferential end portion on the side surface of the tooth body of the pair of gears that are axially undocked from each other. A gear device having a tapered surface as described above.