JPS642770Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Use This invention relates to a bearing device for a crankshaft in an exercise machine for beauty care, etc.

BACKGROUND ART Hitherto, Utility Model Publication No. 47-35880 and Utility Model Publication No. 49-38059 have been known as rotating mechanisms for exercise machines such as beauty instruments. These crankshafts and driven shafts have a general bearing structure using rolling bearings.

Problems to be Solved by the Invention In the conventional bearing device of the above-mentioned known rotating mechanism, the rolling bearing is inserted into the inner diameter or outer diameter of the bearing cylinder and the crankshaft, and is set as required by the attached parts. It must be precisely machined and highly adjusted to ensure smooth rotation. Therefore, products were inevitably subject to high costs.

This invention was made for the purpose of eliminating the above-mentioned drawbacks and improving the high-speed rotation performance of the flywheel.

Means for Solving the Problem The crankshaft 6 is fitted into the bearing cylinder 2 in which the left and right ball bearings 4b and 4a are fitted into the inner diameter of both ends, and the large gear 29 is integrally fixed to the right end of the crankshaft 6. A ball 25 is interposed between the ball bearing groove 7a provided on the outer periphery of the inner end and the right ball bearing one 4a to bear the right end side of the crankshaft 6. A left cone 16 is screwed onto the opposite left end, a flywheel attachment body 14 is loosely fitted between the cone 16 and the right cone 7, and a ball holder is provided on the outer periphery of the inner end of the attachment body 14. The groove 14a is supported on the left ball bearing one 4b of the bearing cylinder via the ball 28, and the ball bearing groove 14b provided on the inner diameter of the opposite outer end is connected to the ball receiving groove 16a provided on the outer periphery of the inner end of the left ball pusher 16. The left end side of the crankshaft 6 is supported via a ball 28a, and a large gear 29 attached to the right cone 7 on the crankshaft 6 is supported by a bearing sleeve 3 disposed parallel to the crankshaft 6. A gear 30 is attached to the flywheel mounting body 14 freely rotating on the crankshaft 6, and a gear 30 is transmitted from the slave shaft 33 to the gear 30 via a chain 45. A crankshaft bearing for a beauty and other exercise machine, characterized in that rotation is transmitted to a flywheel mounting body 14 on a crankshaft 6, and a flywheel 31 integrally supported on the outer periphery is supported so as to be able to rotate at an increased speed. It's in the device.

Function Since this invented device has the above-mentioned configuration, when the crankshaft 6 is rotated, the large gear 29 attached to the right cone 7 rotates, and the slave gear 29, which is supported by the bearing cylinder 3 parallel to the crankshaft 6, rotates. Rotation is transmitted to the shaft 33 via the chain 41, and rotation is transmitted from the slave shaft 33 to the crankshaft 6 by the chain 45, with the left ball bearing one 4b and the left ball pusher 16 on the left end side of the bearing sleeve 2. Rotation is transmitted at increased speed to the freely supported flywheel mounting body 14. If a freewheel is interposed between these transmission mechanisms, the crankshaft can be stopped when the flywheel attachment body 14 rotates with the accumulated rotational force.

Embodiment Hereinafter, this invention will be explained with reference to drawings which are embodiments.
The bearing sleeves 2 and 3 whose axes are parallel to each other are installed, and a ball bearing wand 4 is installed on the inner diameter of both ends of the respective bearing sleeves 2 and 3.
Insert a, 4b and 5a, 5b.

A crankshaft 6 is supported in the bearing sleeve 2 . This crankshaft 6 has a flange 15 on the outer periphery near the middle right end, and a threaded part 9 is provided on the right side of the flange 6. A tapered angle shaft portion 11 into which the base of the right crank 10 is fitted and attached, and a small diameter screw portion 13 into which a locking nut 12 is screwed are provided on the outer end side. The right end side of the crankshaft 6 is rotatably supported with a ball 25 interposed between the ball receiving groove 7a of the right ball pusher 7 and the right ball receiving ring 4a. On the left end side opposite to the crankshaft 6, there is a threaded part 18 into which the left cone 16 and the lock nut 17 are screwed together, a tapered angle shaft part 20 into which the base of the left crank 19 is fitted, and a small diameter threaded part 22 into which the locking nut 21 is screwed. will be established.

The flywheel mounting body 14 has a crankshaft 6 in the center.
A through-hole 14c is opened into which the inner end is inserted, and the outer diameter of the inner end is formed in the ball receiving groove 14a, and the inner diameter of the outer end is formed in the ball receiving groove 14b. The flanges 32 are each integrally attached, and the flywheel 31 is integrally attached and supported by the flanges 32.

The flywheel mounting body 14 is fitted onto the left end side of the crankshaft 6, and the ball bearing groove 14a at the inner end of the flywheel mounting body 14 is supported by the ball bearing groove 14a on the left side with a ball 28 interposed therebetween, and the ball bearing at the opposite outer end. The groove 14b is supported by a ball 28a in a ball bearing groove 16a provided on the outer periphery of the inner end of the left ball pusher 16, and the left end of the crankshaft 6 and the fly are connected to the ball bearing one 4b on the left side of the bearing sleeve 2. The foil mounting body 14 is rotatably supported.

A large gear 29 is integrally attached to the right cone 7.

A slave shaft 33 is rotatably supported in the bearing sleeve 3 .

This slave shaft 33 is provided with a threaded portion 36 on its right end into which a right cone 34 and lock nuts 35, 35 are screwed, and a ball 37 is fitted into a ball receiving groove 34a provided on the outer periphery of the inner end and a ball receiving one 5a on the right side. together with slave shaft 3
A shaft portion 39 is provided on the opposite left end into which a left cone 28 is fitted, and the left cone 38 has a locking nut 47 fixed to a protrusion 46 at the outer end of the shaft portion 39.
The ball 40 is fitted into the ball receiving groove 38a provided on the outer periphery of the inner end of the left ball pusher 38 and the left ball receiving one 5b, thereby bearing the left end side of the slave shaft 33.

A small gear 42 is integrally attached to the right cone 34 on the slave shaft 33, and is connected to the large gear 29 of the right cone 7 on the crankshaft 6 through a chain 41, so that the rotation of the crankshaft 6 is controlled. is transmitted to the slave shaft 33 at an increased speed.

A chain free gear 43 is screwed 44 to the left cone 38, and the rotation speed of the small gear 30 of the flywheel mounting body 14 is further increased by a chain 45, and only one rotation is transmitted to the small gear 30 of the flywheel mounting body 14. Freely provided.

In the figure, a frame 1 is provided with a seat post and a handle post, and a saddle and a handlebar are attached to the frame 1.

Effects of the invention As described above, according to this invention, it is possible to easily install a high-precision bearing by simply press-fitting the ball bearing one into the bearing cylinder without carrying out time-consuming precision cutting or finishing. Since the large gear is attached to the right cone that is screwed onto the right end of the crankshaft, it is also used as a rolling adjustment member for the bearing sleeve to eliminate the large gear mounting member.
The flywheel mounting body is supported between the left cone, which is screwed onto the left end, and the ball holder on the left side of the bearing tube, so the flywheel can be attached to the crankshaft simply by adjusting the left cone. The crankshaft can be rotatably mounted on the body and the ball bearing one of the bearing tube, and the flywheel mounting body is equipped with a flywheel flange and a small gear, so the crankshaft can be The parallel bearing shaft is rotated at increased speed by a chain attached to a small gear.
Moreover, it is possible to rotate at high speed and to maintain this speed by the action of the flywheel.

In addition, the flywheel mounting body has a through hole for the crankshaft in the center, a ball receiving groove for the ball holder of the bearing sleeve on the outer periphery of the right end, and a ball receiving groove for the left ball pusher on the inner diameter of the opposite left end. If the flange for attaching the flywheel is installed on the outer periphery of the left end, and the small gear that receives rotation from the slave shaft is installed on the outer periphery of the ball bearing one side, the overall balance is good and the flywheel can rotate smoothly at high speeds. .

Therefore, it is possible to provide a crankshaft bearing device for a beauty exercise machine that is low cost, has excellent high-speed rotation performance, excellent durability, and allows pedaling with the same feeling of pedal force as when running.

[Brief explanation of the drawing]

FIG. 1 is a side view of the frame of this invented device, FIG. 2 is a vertical cross-sectional view of the main parts of the device, and FIG. 3 is a side view of the crankshaft alone. 1... Frame, 2, 3... Bearing tube, 4a, 5
a...Right ball receiver one, 4b, 5b...Left ball receiver one,
6...Crankshaft, 7...Right ball pusher, 7a...Ball receiving groove, 9...Left threaded portion, 10...Right crank, 14
...flywheel, 14a, 14b...ball receiving groove,
16...Left ball pusher, 16a...Ball receiving groove, 18...Left threaded portion, 19...Left crank, 25, 28, 28
a... Ball, 29... Large gear, 30... Small gear, 31... Flywheel, 32... Flange,
33... Slave shaft, 36... Left threaded part, 41, 45...
...Chain, 43...Chain free gear.

Claims (1)

[Scope of utility model registration request] The crankshaft 6 is fitted into the bearing tube 2 in which the left and right ball bearings 4b and 4a are fitted into the inner diameter of both ends, and the right ball pusher 7, which has a large gear 29 fixed integrally, is screwed to the right end of the crankshaft 6. A ball 25 is interposed between the ball bearing groove 7a provided on the outer periphery of the inner end and the right ball bearing one 4a to bear the right end side of the crankshaft 6, and a left ball pusher 16 is provided at the opposite left end of the crankshaft 6. The flywheel mounting body 14 is loosely fitted between the ball pusher 16 and the right ball pusher 7, and the ball bearing groove 14a provided on the outer periphery of the inner end of the mounting body 14 is inserted into the left ball of the bearing sleeve. The ball bearing groove 14b provided on the inner diameter of the opposite outer end is connected to the ball receiving groove 16a provided on the outer periphery of the inner end of the left ball pusher 16 via the ball 28, and the crankshaft is A chain 41 is connected from a large gear 29 mounted on a right cone 7 on the crankshaft 6 to a slave shaft 33 bearing on a bearing sleeve 3 disposed parallel to the crankshaft 6. A gear 30 is attached to the flywheel mounting body 14 freely rotating on the crankshaft 6, and a gear 30 is connected to the flywheel on the crankshaft 6 via a chain 45 from a slave shaft 33. A crankshaft bearing device for an exercise machine for beauty care, etc., characterized in that rotation is transmitted to a mounting body 14, and a flywheel 31 integrally supported on the outer periphery is supported so as to be able to rotate at an increased speed.