CN201129402Y

CN201129402Y - Worm wheel worm-gearing with adjustable center distance

Info

Publication number: CN201129402Y
Application number: CNU2007201315292U
Authority: CN
Inventors: 孙钊; 陈建新; 姜铭
Original assignee: Yangzhou University
Current assignee: Yangzhou University
Priority date: 2007-12-21
Filing date: 2007-12-21
Publication date: 2008-10-08
Anticipated expiration: 2017-12-21

Abstract

Disclosed is a worm gear driving device with an adjustable center distance, which belongs to the technical field of mechanical driving. The worm gear driving device comprises a box body, an end cover, a worm wheel, a worm and a bearing, wherein the worm wheel, the worm and the bearing are arranged in the box body. The worm gear driving device is characterized by being provided with a worm sleeve, adjusting screw nuts and a sealing ring, wherein the inner circle and the outer circle of the worm sleeve are eccentric, the worm sleeve is arranged on the box body, the worm is arranged inside the worm sleeve via the adjusting screw nuts, the sealing ring and the bearing, the end cover is arranged on the box body and is fixedly connected with the worm sleeve by screw bolts, and two ends of the worm wheel are provided with the screw nuts and gaskets which are used to regulate and drive the worm wheel to shift. The worm gear driving device with an adjustable center distance utilizes eccentricity of the inner circle and the outer circle of the worm sleeve, when rotating the worm sleeve, the movement in horizontal and vertical direction of the worm axis is generated, further by adjusting the two screw nuts at the two ends of the worm wheel, the gaskets are driven by the screw nuts, and then the axis movement of the worm wheel is realized, thereby realizing optimally meshing of the worm wheel and the worm, increasing the drive quality of the device and prolonging the service life of the device.

Description

The worm gearing of adjustable center distance

Technical field

The utility model relates to a kind of mechanical transmission mechanism, particularly worm gearing, belongs to the mechanical transmissioning technology field.

Background technique

In many machineries, adopt worm gearing, general worm gearing is made up of pedestal, worm gear, worm screw, bearing etc., worm gear is fixed and is contained on the pedestal with axle, worm screw has the worm screw seat outward, worm screw also is contained on the pedestal by bearing, bearing housing, the between centers invariant position of worm and wheel.But in worm gear and the actual manufacture process of worm screw, all have foozle inevitably, perhaps use to produce wearing and tearing after a period of time, cause both in transmission process, to have drive gap inevitably, thereby cause worm gear and worm screw reversing drive error.In the transmission of highi degree of accuracy worm and gear, need under the prerequisite that keeps high rigidity, can adjust the drive gap of worm and gear, to obtain high-precision work effect; And present worm and gear is adjusted structure, still fails to satisfy fully above-mentioned requirements; It as application number 02201476.4 worm and worm gear backlash precision adjustment unit, it is the gap of adjusting worm and gear with the supporting frame that can produce displacement, though its structure can realize the adjustment in worm gear, worm screw gap, reduce worm gear and worm screw reversing drive error, but the defective that has insufficient rigidity influences the device transmission quality.

The model utility content

The purpose of this utility model is exactly at existing worm gearing above shortcomings, provide a kind of simple and reasonable, thereby can effectively eliminate the worm gearing of the adjustable center distance of drive gap elimination worm gear, worm drive error between worm gear, worm screw.

The purpose of this utility model is to realize like this, the worm gearing of adjustable center distance, comprise casing, end cap and be installed in casing interior worm gear, worm screw, bearing, it is characterized in that being provided with the worm screw sleeve 2 of inside and outside garden off-centre and adjusting nut 6, seal ring 3, worm screw sleeve 2 is installed on the casing 1, worm screw is installed in the worm screw sleeve 2 by adjusting nut 6, seal ring 3, bearing 4, end cap 8 is installed on the casing 1, end cap 8 and worm screw sleeve 2 usefulness bolts are connected and fixed, and the two ends of worm gear 9 are provided with adjusts nut 11 and the packing ring 10 that promotes the worm gear displacement.

Be provided with adjusting washer (disk) 7 between end cap 8 and the bearing 4.

The utility model is scientific and reasonable for structure, manufactures easily, installs easy to adjust.Utilize the off-centre in the inside and outside garden of worm screw sleeve, rotary worm sleeve 2 makes moving of worm axis generation level and Vertical direction, by regulating the nut 11 at worm gear 9 two ends, nut 11 drives packing ring 10 and realizes worm gear 9 axial moving, thereby realizes the optimal engagement of worm gear 9 worm screws 5.Regulate the bearing play by rotation adjusting nut 6, end cap 8 guarantees the high rigidity between worm gear 9, the worm screw 5 by regulating bolt and adjusting packing ring 7 compacting bearings 4.The utility model is realized the adjustment in worm gear, worm screw gap, reaches optimal engagement, reduces worm gear and worm drive error, improves the device transmission quality.Good rigidity, stable performance, extension fixture working life.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the sectional structure structure schematic representation of Fig. 1.

Among the figure: 1 casing, 2 worm screw sleeves, 3 seal rings, 4 bearings, 5 worm screws, 6 adjusting nuts, 7 adjusting washer (disk)s, 8 end caps, 9 worm gears, 10 packing rings, 11 nuts, 12 worm-wheel shafts.

Embodiment

As shown in Figure 1, worm screw sleeve 2 is installed on the casing 1, the inside and outside garden of worm screw sleeve off-centre (the inwall circle of worm screw sleeve does not overlap with outer wall circle shaft axis).Worm screw is installed in the worm screw sleeve 2 by adjusting nut 6, seal ring 3, bearing 4.Size according to worm hole on the casing 1 is processed into corresponding size with end cap 8, and end cap 8 is fixed on the casing 1, and end cap 8 and worm screw sleeve 2 usefulness bolts 13 are connected and fixed, and between end cap 8 and the bearing 4 adjusting washer (disk) 7 are set.Worm gear 9 is installed on the worm-wheel shaft 12 by key, and the worm gear two ends are provided with respectively and promote nut 11 and the packing ring 10 that worm gear moved, regulated the worm gear position.Utilize the off-centre in the inside and outside garden of worm screw sleeve, rotary worm sleeve 2 makes moving of worm axis generation level and Vertical direction, and by regulating the nut 11 at worm gear 9 two ends, nut 11 drives packing ring 10 and realizes worm gear 9 axial moving; Thereby realize the optimal engagement of worm gear 9 worm screws 5.

Claims

1, the worm gearing of adjustable center distance, comprise casing, end cap and be installed in casing interior worm gear, worm screw, bearing, it is characterized in that being provided with eccentric worm screw sleeve of inside and outside circle and adjusting nut, seal ring, the worm screw sleeve is installed on the casing, worm screw passes through adjusting nut, seal ring, Bearing Installation in the worm screw sleeve, end cap is installed on the casing (1), and end cap and worm screw sleeve are connected and fixed with bolt, and the two ends of worm gear are provided with adjusts the nuts and washers that promotes the worm gear displacement.

2, the worm gearing of adjustable center distance according to claim 1 is characterized in that being provided with adjusting washer (disk) between described end cap and the bearing.