JPH055250U - Gear product positioning device - Google Patents

Abstract

(57) [Abstract] [Purpose] The gear product 9 having the tooth profile 16 on the periphery is accurately and automatically positioned simply by setting it on the rotating disk 13a. [Structure] Two or more positioning claws 17 having meshing teeth 17 matching the tooth profile 16 of the gear product 9 are provided so as to be able to advance and retract from the radial direction toward the center, and on the central axis orthogonal to the radial direction. The rotary punch 8 and the turntable 13a are provided so as to be able to move up and down.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a gear having a tooth profile on its periphery. For example, when the gear is set in a forging die and cold forged in order to improve the tooth profile accuracy of the pre-formed product formed by hot forging, The present invention relates to a gear product positioning device that positions a tooth profile and a forging-type orthodontic tooth so that they accurately mesh with each other.

[0002]

[Prior Art]

 As described above, when setting the gear preform in the forging die, the preform must be positioned so that the tooth profile of the preform matches the shaping tooth in the forging die. Conventionally, in gears having tooth profiles with chamfers for guiding, such as reverse idle gears and clutch gears, positioning was performed while checking the fit state of the chamfer part of the preform and the orthodontic teeth with the touch of the hand. However, positioning was not easy with a gear that does not have a chamfer.

[0003]

[Problems to be solved by the device]

 The fitting of the chamfer portion and the tooth-shaping tooth requires only a slight difference in height of the chamfer portion, and therefore skill is required to accurately and quickly match them. Moreover, not only is it inefficient to rely on it by hand, but it is particularly dangerous in forging dies, and there has been a demand for immediate automation.

[0004]

[Means for Solving the Problems]

 The present invention is intended to improve workability by automating positioning, and is arranged on one side of a gear product having a tooth profile around it, and is movable in the axial direction of the gear product, and the shaft is A pressure contact body that is rotatable about the center, a gear pedestal that is arranged on the other side of the gear product, and that has a contact surface with the gear product that is rotatable about the shaft, The gear product positioning device is provided with two or more positioning claws that have meshing teeth that match the tooth profile of the molded gear product and that advance and retract from the radiation direction toward the center.

[0005]

[Action]

 If the pressure contact body is pressed against the gear product on the pedestal to rotate, and while they are rotating, the positioning jaws are advanced to engage the tooth profile with the meshing tooth, and the gear product is indexed to the correct position. Then, the gear product is automatically positioned by retracting the positioning pawl.

[0006]

【Example】

 An embodiment in which the gear product positioning device according to the present invention is incorporated into a cold forging die and a punch will be described with reference to the drawings. Reference numeral 1 denotes a main punch. The main punch 1 is moved up and down by a driving means (hydraulic mechanism) not shown, and has a recess 2 on the lower pressing surface side. A stud screw 3 projects downward from the center of the bottom surface of the recess 2, and the stud screw 3 has a movable ring urged downward by a spring 4 in the recess 2. A movable bearing 6 is interposed between the movable ring 5 and the inner peripheral surface of the recess 2. Further, a rotary bearing 8 is interposed between the movable screw 5 and the movable ring 5, and a rotary punch 8 as a pressure contact member is attached to the distal end side of the implant screw 3 so as to be freely rotatable. The rotary punch 8 is provided with a fitting projection 10 that matches the shaft insertion hole 9a of the preformed gear product 9.

Reference numeral 11 denotes a die, which is formed in the center of the die, and from the center of the bottom surface of the upsetting recess 12 having the shaping teeth 12 a along the inner circumference of the bottom, an ejector serving as a receiving stand for the gear product 9. 13 is provided so that it can appear and disappear. The ejector 13 has a rotating disk 13a supported on the upper surface thereof by a bearing 14, and on the upper surface of the die 11, positioning claws 15, 15, 15 which slide along the upper surface of the die 11 in respective radial directions divided into three equal parts. Is set up. As shown in FIG. 2, the positioning claw 15 is provided at its tip end with three meshing teeth 17 that match the tooth profile 16 of the gear product 9, respectively. The positioning claws 15, 15, 15 are interlocked with the raising and lowering operation of the main punch 1, and the tooth profile 16 of the gear product 9 is set on the rotary table 13a of the ejector 13 by hydraulic pressure, a cam or a link mechanism. It is designed to advance to the position and to retreat to the outside of the upsetting recess 12, and the positioning claws 15, 15, 15 are set with a downward clearance allowance in order to avoid interference with the main punch 1. There is.

According to the die 11 and the punch 1 for cold forging thus formed, first, the meshing teeth 17 of the positioning claws 15, 15, 15 and the tooth profile 16 of the gear product 9 to be set are set. When the gear product 9 is retracted from the meshing position, it is placed on the turntable 13a (Fig. 3), and when the main punch 1 is pushed down, the rotary punch 8 is pressed against the upper surface of the gear product 9. Then, the gear product 9 is sandwiched between the rotary disk 13a (FIG. 4). When the main punch 1 is further lowered, the movable ring 5 is rotated by the pressing action to compress the spring 4. Between the movable ring 5 and the rotary punch 8, a means for generating a frictional force sufficient to rotate the rotary punch 8 is provided, and the rotary punch 8 is rotated as the movable ring 5 rotates. Is driven to rotate. Therefore, when the positioning claw 15 is advanced, the tooth profile of the gear product 9 rotating by the movable ring 5 and the meshing tooth 17 of the positioning claw 15 mesh with each other to stop the rotation of the gear product 9 (FIG. 5, FIG. 8). Here, if the positioning claw 15 is retracted (FIG. 6), and then the ejector 13 is lowered, the gear product 9 is sandwiched between the main punch 1 and the turntable 13a, and the gear product 9 is positioned inside the upsetting recess 12 (guided). Then, the tooth profile 16 of the gear product 9 is accurately meshed with the shaping tooth 12a (FIG. 7).

In the above embodiment, the positioning claws are provided in each radial direction divided into three equal parts, but the number of positioning claws is not limited as long as it is two or more, and the number of meshing teeth is not limited. It can be set freely. If the tooth profile of the gear product has a chamfer, the positioning claw can be advanced first, and the positioning can be performed by the interaction between the rotary punch and the positioning claw. The above-mentioned embodiment is incorporated into a die and a punch for cold forging, but the apparatus to be incorporated may be other equipment as long as it is necessary to position the gear product, and in the case of transfer. It is also possible to provide a station dedicated to positioning before molding, and place a stand-alone machine dedicated to positioning there. Further, as for the structure of the pressing body and the receiving base, the rotating means is not limited to the embodiment as long as it is rotatable, and it may be used together with the conventional mechanism.

[0010]

[Effect of the device]

 According to the present invention, the gear product on the pedestal is pressed and rotated by the pressing body, and the positioning pawl is advanced during the rotation, and the tooth profile of the gear wheel product having a height difference and the meshing tooth of the positioning pawl are engaged. Since the gears can be reliably positioned by meshing with and, highly efficient automatic positioning can be realized even with gear products that do not have chamfers.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a positioning device according to the present invention.

FIG. 2 is an explanatory diagram showing an arrangement of meshing teeth.

FIG. 3 is an explanatory diagram showing the operation of the positioning device.

FIG. 4 is an explanatory diagram showing the operation of the positioning device.

FIG. 5 is an explanatory view showing the operation of the positioning device.

FIG. 6 is an explanatory view showing the operation of the positioning device.

FIG. 7 is an explanatory diagram showing the operation of the positioning device.

FIG. 8 is an explanatory diagram exemplifying a meshing state of a tooth profile and meshing teeth.

[Explanation of symbols]

1-Main punch, 2-Concavity, 3-implant bolt, 4-Spring, 5-Movable ring, 6-Movable bearing, 7-Conduction bearing, 8-Pivoting punch, 9-・ Gear products, 10 ・ ・ Injection protrusions, 11 ・ ・ Dies, 12 ・ ・ Upsetting recesses, 13 ・ ・ Ejectors, 13a ・
・ Turning table, 14 ・ ・ Bearing, 15 ・ ・ Positioning claw,
16 ... Tooth profile, 16a ... Chamfer, 17 ...

Claims (1)

[Claims for utility model registration] [Claim 1] It is arranged on one side of a gear product having a tooth profile around it, is movable in the axial direction of the gear product, and rotates about the shaft. A free pressure contact body, a gear pedestal that is arranged on the other side of the gear product, and the contact surface with the gear product is rotatable about the shaft, and the preformed gear product at the tip. Positioning device for gear products, which is provided with meshing teeth matching the tooth profile of, and is composed of two or more positioning claws that advance and retract from the radial direction toward the center.