Worm gear assembly pdf

Crosher, WP. ASME Press, These three requirements for acceptable worm gearing performance are effected by a wide range of unclear specifications.

The only criteria is to have satisfactory operation for a stated time period. When gears run smoothly, without vibration, carry the rated load for the required number of hours without breakage or problematic wear at reasonable temperatures, and operate quietly, we have succeeded.

When worms are difficult to assemble to the mating wheel or, for whatever reasons, are unsatisfactory and if accuracy, high speeds, or large powers are required, then systematic methods of inspection are essential. This inspection must be combined with the Sign In or Create an Account. Thereafter the worm gear 24 is slide onto the hub 18 and the second clutch plate 26 is slid onto the hub 18 with its key 27 engaging the keyway Subsequently, the Belleville spring washer 28 is placed on the worm shaft 10 in engagement with the second clutch plate 26, and thereafter the collar 30 is slipped over the worm shaft 10 and forced axially to the left, as seen in FIGURES 1 and 2, until the requisite pressure is applied to the clutch plates by the Belleville spring washer The pressure exerted by the Belleville spring washer 28 controls the output torque, i.

With the Belleville spring stressed by the collar 30, the collar is staked in position at one or more places 32 to retain the parts in assembled relation.

It is readily apparent that by assembling the worm shaft and gear assembly in the aforesaid manner, the pressure applied by the Belleville spring washer can be accurately controlled in a straightforward manner, thus greatly facilitating mass production of these assemblies.

By accurately controlling the output torque of the worm shaft and gear assembly, breakage of worms in window regulator mechanism will be obviated. While the embodiment of the present invention as herein disclosed constitutes a preferred form, it is to be understood that other forms might be adopted.

A worm shaft and gear assembly including, a shaft having an integral worm adjacent one end thereof and a hub adjacent the other end thereof with an upstanding shoulder, said hub having an axially extending keyway, a gear journalled on said hub, a pair of clutch plates keyed to said hub and disposed on opposite sides of said gear, a Belleville spring washer engaging one of said clutch plates, and a collar engaging said Belleville spring washer for stressing the same to maintain said other clutch plate in abutment with said shoulder and both clutch plates in frictional engagement with said gear to control the output torque, said shaft having an annular groove spaced axially from said hub, said collar being staked in said annular groove to maintain said Belleville spring washer under said stress.

USA en. We have exported several products to our clients all over the world, we have prolonged-time encounter and sturdy engineering support. You also can check our site to know for a lot more details, if you need our goods catalogue, remember to make contact with with us. Our company and the shown alternative elements contained herein are not sponsored, accepted, or made by the OEM.

W four. Hu West Lake Dis. Our Group is willing to work with you hand in hand and create brilliance with each other! Shaft 4 is journaled in a bearing 29 disposed on one side of the worm 3 and a bearing 21 disposed on the opposite side of the worm 3.

Bearings and are disposed in bearing openings 22 and 23 formed by opposing semi-cylindrical recesses provided in the two housing sections l2 and 13, respectively. Shaft l is journaled in bearings disposed in laterally extending bosses 24 and 25 formed integral with the housing sections 12 and I3, respectively.

Shafts 4 and l are disposed relatively to each other such that worm 3 has proper driving engagement with the Power is delivered to shaft 4 through a pulley 29 fixed to the outwardly projecting end Crank wheels 3! Crank wheels 3 and 32 are connected with the mechanism to be reciprocated, such as the pump rod of the pump, by means of pitmans 35 and 33 journaled on crank pins provided on the crank wheels.

With the shaft 4 being rotated in the direction shown by the arrow, worm gear 6 will be rotated in the-direction shown by the arrow applied to it. Under load, worm 3 will then exert an end thrust in the direction of bearing 2!.

Bearing 2 has been provided with an enlarged flange 35 having a fiat end face 38 contacting with the end 39 of worm 3 to resist such end thrust.