CN202338603U

CN202338603U - Speed reducer

Info

Publication number: CN202338603U
Application number: CN2011204612973U
Authority: CN
Inventors: 金建光
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-11-18
Filing date: 2011-11-18
Publication date: 2012-07-18
Anticipated expiration: 2021-11-18

Abstract

The utility model relates to the technical field of speed reducers. A speed reducer comprises a case body, a case cover fixedly connected with the case body, an input shaft, an output shaft, a small central wheel, a small planet wheel, a small inner tooth ring in clearance fit with the case cover, a small planet wheel carrier, a large central wheel, a large planet wheel, a large inner tooth in clearance fit with the case body and a large planet wheel carrier. The small central wheel is installed at one end of the input shaft, the small central wheel and the small planet wheel are meshed, the small planet wheel and the large planet wheel are meshed, the small planet wheel is movably connected onto the small planet wheel carrier, the small planet wheel carrier is meshed with the large central wheel, the large central wheel is meshed with the large planet wheel, and the large planet wheel is meshed with the large inner tooth ring. Protrusions are positioned on meshed faces of teeth of the small planet wheel and teeth of the large planet wheel, and the height of each protrusion is 0.01-0.015mm. The large planet wheel is movably connected onto the large planet wheel carrier, and the large planet wheel carrier is connected with the output shaft. The speed reducer is simple in manufacture, low in production cost, simple in structure, good in transmission and capable of increasing friction in a humanly scaled process.

Description

Speed reducer

Technical field

The utility model relates to the speed reducer technical field.

Background technique

Speed reducer is widely used in robot, automobile and other industries as the mechanical transmission vitals.A kind of speed reducer comprises the internal gear that is formed at its frame, is located at bent axle with eccentric part in the frame and the cycloid wheel that is provided with the gear teeth that is sheathed on eccentric part.Cycloid wheel and crankshaft eccentric portion interlock, and through on one side and internal gear engagement revolution on one side will import rotational delay and obtain exporting and rotate.Yet,, obtain output stably for reaching higher engagement contact ratio; The cycloid wheel of above-mentioned speed reducer forms the gear teeth of tight setting usually at its outer peripheral surface, be that it is very tiny that the gear teeth need be done when the more and speed reducer overall dimensions of the gear teeth quantity of need setting is restricted; And the gear teeth are also very little in circumferencial direction spacing each other; Even can produce overlapping interference at the tooth root position, thus the manufacture difficulty of the cycloid wheel and the gear teeth thereof is strengthened, cost of production is higher and structure is complicated.

The model utility content

The technical problem that the utility model will solve is: overcome the deficiency in the existing technology, provide a kind of manufacturing simple, the speed reducer that cost of production is lower and simple in structure.

The utility model solves the technological scheme that its technical problem adopted: a kind of speed reducer, speed reducer have that casing, the case lid that is fixedly connected with casing, input shaft, output shaft, little central gear, asteroid wheel, the small internal gear with the case lid interference fit, planetoid wheel carrier, big central gear, major planets are taken turns, and the big ring gear and the major planets wheel carrier of casing interference fit; One end of input shaft is equipped with little central gear, and little central gear is meshed with asteroid wheel, and asteroid wheel is meshed with small internal gear, and asteroid wheel is movably connected on the planetoid wheel carrier; The planetoid wheel carrier is meshed with big central gear; Big central gear is meshed with the major planets wheel; The major planets wheel is meshed with big ring gear, is provided with convexity on the Surface of action of the Surface of action of the planetoid gear teeth and the major planets gear teeth, and protruding height is 0.01～0.015mm; The major planets wheel is movably connected on the major planets wheel carrier, and the major planets wheel carrier is connected with output shaft.

Further, the matching gap of described small internal gear of the utility model and case lid is 0.3 ± 0.05mm, and the matching gap of big ring gear and casing is 0.4 ± 0.05mm.

Further, the described small internal gear of the utility model port is provided with chamfering with big ring gear port, and the number of degrees of chamfering are 15 °.

Further, the described small internal gear of the utility model is low-carbon alloy with big ring gear and just processes.

The beneficial effect of the utility model is: the utility model manufacturing is simple, and cost of production is lower and simple in structure, realizes good transmission, increases the speed reducer of the frictional force in the window opening process.

Description of drawings

Below in conjunction with accompanying drawing and mode of execution the utility model is further specified.

Fig. 1 is the structural representation of the utility model.

Among the figure 1, casing, 2, case lid, 3, little central gear, 4, asteroid wheel, 5, small internal gear, 6, the planetoid wheel carrier, 7, big central gear, 8, the major planets wheel, 9, big ring gear, 10, the major planets wheel carrier.

Embodiment

Combine accompanying drawing that the utility model is further described now.The schematic representation that these accompanying drawings are simplification is only explained the basic structure of the utility model in a schematic way, so it only shows the formation relevant with the utility model.

A kind of speed reducer as shown in Figure 1, speed reducer have casing 1, the case lid 2 that is fixedly connected with casing 1, input shaft, output shaft, little central gear 3, asteroid wheel 4, small internal gear 5, planetoid wheel carrier 6, big central gear 7, major planets wheel 8 with case lid 2 interference fit, with the big ring gear 9 and the major planets wheel carrier 10 of casing 1 interference fit; One end of input shaft is equipped with little central gear 3, and little central gear 3 is meshed with asteroid wheel 4, and asteroid wheel 4 is meshed with small internal gear 5, and asteroid wheel 4 is movably connected on the planetoid wheel carrier 6; Planetoid wheel carrier 6 is meshed with big central gear 7; Big central gear 7 is meshed with major planets wheel 8; Major planets wheel 8 is meshed with big ring gear 9, and the Surface of action of asteroid wheel 4 teeth and major planets are taken turns on the Surface of action of 8 teeth and be provided with convexity, and the height of convexity is 0.01～0.015mm; Major planets wheel 8 is movably connected on the major planets wheel carrier 10, and major planets wheel carrier 10 is connected with output shaft.

The matching gap of small internal gear and case lid is 0.3 ± 0.05mm, and the matching gap of big ring gear and casing is 0.4 ± 0.05mm.The small internal gear port is provided with chamfering with big ring gear port, and the number of degrees of chamfering are 15 °.Be provided with chamfering be convenient to small internal gear 5 and big ring gear 9 better according to, small internal gear is low-carbon alloy steel with big ring gear and processes, and has strengthened intensity, makes the longer service life of gear ring.

Above-mentioned mode of execution is only for explaining the technical conceive and the characteristics of the utility model; Its purpose is to let the personage that is familiar with this technology can understand the content of the utility model and implements; Can not limit the protection domain of the utility model with this; All equivalences of being done according to the utility model spirit change or modify, and all should be encompassed in the protection domain of the utility model.

Claims

1. speed reducer is characterized in that: retarder have casing (1), the case lid (2) that is fixedly connected with casing (1), input shaft, output shaft, little central gear (3), asteroid wheel (4), small internal gear (5), planetoid wheel carrier (6), big central gear (7), major planets wheel (8) with case lid (2) interference fit, with the big ring gear (9) and the major planets wheel carrier (10) of casing (1) interference fit; One end of input shaft is equipped with little central gear (3), and little central gear (3) is meshed with asteroid wheel (4), and asteroid wheel (4) is meshed with small internal gear (5), and asteroid wheel (4) is movably connected on the planetoid wheel carrier (6); Planetoid wheel carrier (6) is meshed with big central gear (7); Big central gear (7) is meshed with major planets wheel (8); Major planets wheel (8) is meshed with big ring gear (9), is provided with convexity on the Surface of action of the Surface of action of asteroid wheel (4) tooth and major planets wheel (8) tooth, and protruding height is 0.01～0.015mm; Major planets wheel (8) is movably connected on the major planets wheel carrier (10), and major planets wheel carrier (10) is connected with output shaft.

2. speed reducer according to claim 1 is characterized in that: described small internal gear (5) is 0.3 ± 0.05mm with the matching gap of case lid (2), and big ring gear (9) is 0.4 ± 0.05mm with the matching gap of casing (1).

3. speed reducer according to claim 1 is characterized in that: described small internal gear (5) port is provided with chamfering with big ring gear (9) port, and the number of degrees of chamfering are 15 °.

4. speed reducer according to claim 1 is characterized in that: described small internal gear (5) and big ring gear (9) are low-carbon alloy steel and process.