CN201031927Y

CN201031927Y - Two-stage worm gear worm reducer

Info

Publication number: CN201031927Y
Application number: CNU2007200518497U
Authority: CN
Inventors: 曾广西
Original assignee: GUANGZHOU OTESHI TRANSMISSION EQUIPMENT CO Ltd
Current assignee: GUANGZHOU OTESHI TRANSMISSION EQUIPMENT CO Ltd
Priority date: 2007-05-24
Filing date: 2007-05-24
Publication date: 2008-03-05
Anticipated expiration: 2017-05-24

Abstract

The utility model discloses a double-stage worm gear reducer which comprises a tank; a first worm gear and a first worm are fixed in the tank by bearings and the tank is sealed by a bearing cover, a seal ring and a seal cover; the utility model is characterized in that the reducer is also equipped with a second worm gear and a second worm, and the second worm gear is equipped with a socket in which the first worm gear is arranged. The utility model utilizes two worm gears and worms which are meshed with each other and realizes double-gear drive; moreover, the utility model can increase the output torque according to the drive ratio which needs flexible change; the structure is compact and the volume is small; at the same time, the drive intensity and efficiency are increased.

Description

The twin-stage worm type of reduction gearing

Technical field

The utility model relates to a kind of transmission device, especially a kind of new type speed reducer that utilizes the worm and gear transmission.

Background technique

The worm and gear transmission is a kind of two between centers transmitting movements staggered in the space and the kind of drive of power, this kind of drive has big, the stable transmission advantage of velocity ratio, so be usually used in two shaft staggered occasions, for example in the machine and equipments such as lathe, automobile, handling machinery, metallurgical machinery.But it all is the transmission of single-stage worm and gear that present major part is utilized the retarder of worm and gear transmission, and the transmission speed ratio of this retarder and output torque all are restricted.Twin-stage worm and gear transmission if desired, general way are to adopt two retarders conjuncted, and this structure takes up room greatly, and accessory is many, the cost height.Simultaneously, existing worm and gear adopts flute profiles such as ZN, ZI more, and these flute profile volumes are big, and are not easy to form oil film, and transmission efficiency is lower, damages easily.

Summary of the invention

The purpose of this utility model is to overcome shortcoming of the prior art with not enough, provides a kind of good airproof performance, velocity ratio height, the output torque is big, volume is little, compact structure and transmission intensity and all higher twin-stage worm type of reduction gearing of transmission efficiency.

To achieve these goals, the utility model is realized by following technological scheme:

A kind of twin-stage worm type of reduction gearing, comprise a casing, pass through bearing fixing first worm gear and first worm screw in the casing respectively, and utilize bearing cap, seal ring and sealing cover to seal, it is characterized in that: described retarder also is provided with second worm gear and second worm screw, and second worm gear is provided with and can inserts and affixed jack for first worm screw.Utilize the interlock of first worm screw and second worm gear, can realize that second worm screw drives first worm drive, thereby realize the twin-stage transmission, improved transmission speed ratio and output torque.

Above-mentioned worm gear and worm screw are adopted the ZK1 flute profile, and are in 90 degree engagements.The helicoid of ZK1 flute profile is formed by conical surface plate-like milling cutter or emery wheel envelope, and the flute profile curve is tending towards arcuation, and axial recessed exterior feature is similar to archimedes curve, forms oil film easily, can reduce friction, and raises the efficiency.

Above-mentioned second worm screw is provided with the input hole that connects motor shaft, and first worm gear is provided with the output shaft that connects transmission device.

The engagement that the utility model utilizes two worm and gear combinations has realized the twin-stage transmission, and the flexible transformation velocity ratio has improved the output torque as required, and compact structure, and volume is little, has improved transmission intensity and transmission efficiency simultaneously.

In order to understand the utility model more clearly, set forth embodiment of the present utility model below with reference to description of drawings.

Description of drawings

Fig. 1 is a plan view of the present utility model.

Fig. 2 is a rear view of the present utility model.

Fig. 3 is a lateral plan of the present utility model.

Fig. 4 is a plan view of the present utility model.

Fig. 5 is the sectional view of A-A direction among Fig. 3.

Fig. 6 is the sectional view of B-B direction among Fig. 3.

Fig. 7 is the sectional view of C-C direction among Fig. 4.

Numbering expression respectively among the figure:

1, casing; 2: lip-type packing; 3: axle sleeve; 4: bearing; 5: square key; 6: worm gear; 7: worm screw; 8: bearing; 9: circlip; 10: sealing cover; 11: output shaft; 12: worm gear; 13: ○Xing Mifengquan; 14: flat key 15: bearing cap; 16: bolt; 17: ○Xing Mifengquan; 18: lip-type packing; 19: bearing; 20: circlip; 21: sealing cover; 22: circlip; 23: bearing; 24: bearing; 25: ○Xing Mifengquan; 26: lip-type packing; 27: bolt; 28: input flange; 29: bolt; 30: worm screw.

Embodiment

Shown in Fig. 1～7, the utility model comprises a casing 1, is provided with two worm and gear combinations in the casing 1, and the combination of first worm and gear comprises that first worm gear 12 and the combination of first worm screw, 7, the second worm and gears comprise second worm gear 6 and second worm screw 30.Wherein, second worm gear is provided with jack, can insert and fixedly connected for first worm screw; The worm gear of each combination and worm screw are all adopted the ZK1 flute profile, and are in 90 degree engagements; Second worm screw 30 is provided with the input hole that connects motor shaft, and first worm gear 12 is provided with the output shaft 11 that connects transmission device.Utilize the interlock of first worm screw 7 and second worm gear 6, can realize that second worm screw 30 drives 12 transmissions of first worm gear, thereby realize the twin-stage transmission, improved transmission speed ratio and output torque.

In casing 1, utilize fixedly worm gear 12 of bearing 19, bearing 4,8 and axle sleeve 3 be worm screw 7 and worm gear 6 fixedly, and bearing 23,24 is worm screw 30 fixedly; Use bearing cap 15 again,

seal ring

2,13,17,18,25,26 and sealing cover 10,21 just can be with this retarder sealing lockings.The core drive unit that this twin-stage worm type of reduction gearing is high voltage isolator operation mechanism, motor drive mechanism is applicable on the high voltage isolator of thermal power plant, hydroelectric power plant, wind power station and electric substation etc.

The installation process of this twin-stage worm type of reduction gearing is roughly as follows:

1, square key 5, worm gear 6, axle sleeve 3 and bearing 4 are pressed into worm screw 7;

2, the worm screw 7 that has installed the casing 1 of packing into, annotate: can not put in place, worm screw 7 can swing;

3, on one side with worm screw 7 beats, after worm gear 12 two ends install bearing 19, the casing 1 of packing into;

4, ○Xing Mifengquan 13,17 is packed after the bearing cap 15 into the casing 1 of packing into;

5, worm screw 7 is pressed onto the position, bearing 24 is pressed into worm screw 30 reinstalls casing 1;

6, input flange 28 is packed after the ○Xing Mifengquan 25 into casing 1 lock bolt 29 of packing into;

7, bearing 23 is packed into casing 1 is axially adjusted shooting property back-up ring 22, sealing cover 21 after adjusting, the casing 1 of then lip-

type packing

2,18,26 being packed into according to actual conditions;

8, add lubricant oil or grease according to quantity after, with bearing 8 casing 1 of packing into, according to the actual conditions adjusting play, shooting property back-up ring 9, sealing cover 10 then;

9, flat key 14 is packed into output shaft 11 output shaft 11 worm gear 12 of packing into, is installed circlip 20 then again;

10, motor shaft is inserted worm screw 30 input holes, connect flange, lock bolt 27 can be imported retarder to transmission, from the rotating speed of the required velocity ratio of output shaft 11 outputs.

This twin-stage worm type of reduction gearing has the following advantages:

1, adopts twin-stage transmission, flexible transformation velocity ratio as required.

2, adopt the ZK1 flute profile, its helicoid is formed by conical surface plate-like milling cutter or emery wheel envelope, and the flute profile curve is tending towards arcuation, and axial recessed exterior feature is similar to archimedes curve, forms oil film easily, can reduce friction, and raises the efficiency.

3, because the product shape line of taper disk-shaped tool is a straight line, improve flute profile intensity easily and carry out precision processing, therefore, structure is compacter than normal cylindrical worm gear drive.

4, worm gear 6,12 and worm screw 7,30 are adopted high-quality high strength, high-abrasive material, have promoted the working life of retarder.

The utility model is not limited to above-mentioned mode of execution, if various changes of the present utility model and modification are not broken away from spirit and scope of the present utility model, if these are changed and modification belongs within claim of the present utility model and the equivalent technologies scope, then the utility model also is intended to comprise these changes and modification.

Claims

1. twin-stage worm type of reduction gearing, comprise a casing (1), pass through bearing fixing first worm gear (12) and first worm screw (7) in the casing (1) respectively, and utilize bearing cap (15), seal ring and sealing cover (10) to seal, it is characterized in that: described retarder also is provided with second worm gear (6) and second worm screw (30), second worm gear (6) is provided with and can inserts and affixed jack for first worm screw (7).

2. twin-stage worm type of reduction gearing according to claim 1 is characterized in that: described worm gear and worm screw are adopted the ZK1 flute profile, and are in 90 degree engagements.

3. twin-stage worm type of reduction gearing according to claim 1 is characterized in that: described second worm screw (30) is provided with the input hole that connects motor shaft, and first worm gear (12) is provided with the output shaft (11) that connects transmission device.