CN201354837Y

CN201354837Y - Equidistance spiral bevel gear

Info

Publication number: CN201354837Y
Application number: CNU2009200376298U
Authority: CN
Inventors: 邓恩龙; 王玉林
Original assignee: PORITE YANGZHOU TECHNOLOGY AND INDUSTRY Co Ltd
Current assignee: PORITE YANGZHOU TECHNOLOGY AND INDUSTRY Co Ltd
Priority date: 2009-01-13
Filing date: 2009-01-13
Publication date: 2009-12-02
Anticipated expiration: 2019-01-13

Abstract

The utility model discloses an equidistance spiral bevel gear in the field of mechanical transmission spare parts, wherein tooth traces thereof are space curve lines on the taper surface, a tooth profile is a spherical surface involute, and the thread pitches of the tooth traces on the taper surface are equal. The tooth profile of the equidistance spiral bevel gear can be contracted with equal proportion from the big end of a cone gear to the small end of the cone gear and also can be contracted with unequal proportion from the big end of the cone gear to the small end of the cone gear. Since the thread pitches of the gear on the taper surface are equal, the gear can be removed from a die cavity through rotation when in manufacture and can not generate interference, the gear can be manufactured through the die shaping technique, the driving mode of the equidistance spiral bevel gear is the same with the driving mode of an existing spiral circular arc bevel gear, contacting lines are similar when in driving, and the gear has the advantages of stable driving, high efficiency and strong bearing ability, and has convenient manufacture and low cost compared with the prior art.

Description

Equidistant helical bevel gear

Technical field

The utility model relates to a kind of mechanical transmission component, particularly a kind of gear.

Background technique

In gear transmission part, very important kind of drive of awl (umbrella) tooth transmission; In the prior art, a kind of spiral arc bevel gear is arranged, it is by the Gleason company design of the U.S. the earliest and makes, the gear of this standard becomes the main product of spiral awl tooth, and use till today, its structural major character is that the tooth trace helical pitch of this helical bevel gear is the circular arc line of conical surface. alwaysIts deficiency is: such gear is not suitable for adopting the mould manufacturing, because its tooth trace is a circular arc line, deviate from the former process at product, the phenomenon that has interference takes place, do not meet formed in mould making principle, so this spiral arc bevel gear is not suitable for adopting the mould manufacturing, the manufacturing of need employing special processing equipment, the cost height, speed is slow.

The model utility content

The purpose of this utility model provides a kind of equidistant helical bevel gear, makes its stable transmission simultaneously, can also be suitable for Mould Machining, to enhance productivity.

The purpose of this utility model is achieved in that equidistant helical bevel gear, and its tooth trace is the space curve at conical surface, and flank profil is a spherical involute; The pitch of tooth trace on conical surface equates.

The flank profil of this equidistant helical bevel gear can be shunk to cone gear small end equal proportion from the big end of cone gear, also can shrink to cone gear small end inequality proportion from the big end of cone gear.Gear provided by the utility model, because its pitch on conical surface equates, it is added deviates from from die cavity by rotation man-hour, can not cause interference, it can pass through powder metallurgy, and formed in mould methods such as powder metal forging and cold and hot metal forging are made, and this equidistant Helical Bevel Gear mode is identical with the kind of drive of existing spiral arc bevel gear, line of contact during transmission is close, all has stable drive, efficient, advantage that bearing capacity is strong; Compared with prior art, the utility model is easily manufactured, and is with low cost.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the unfolded drawing of the pitch circle awl of equidistant helical bevel gear.

Fig. 3 is the three-dimensional modeling schematic representation of equidistant helical bevel gear.

Wherein, 1 tooth trace, 2 circular helixes, 3 pitch cylinders, 4 pitch circles awl, the big end of 5 cone gears, 6 cone gear small ends, 7 flank profils.

Embodiment

As Fig. 1, be equidistant helical bevel gear, its tooth trace 1 is the space curve at conical surface, wherein flank profil 7 is spherical involutes; The pitch of described tooth trace 1 on conical surface equates.Flank profil 7 can be shunk to cone gear small end 6 equal proportions from the big end 5 of cone gear, and flank profil 7 also can be shunk to cone gear small end 6 inequality proportions from the big end 5 of cone gear.

Can be as shown in Figure 2 after its pitch circle awl 4 launches, tooth trace 1 can be until base cone 4 tops in theory.

Said gear adopts mould-forming to make, and mould is reprocessed moulding after by three-dimensional modeling, and its die cavity is the isometric circle bevel gear, can be as shown in Figure 3 during modeling, be diameter with the end circle of pitch circle awl 4, be height with the height of pitch circle awl 4, set up an external cylinder, promptly pitch cylinder 3; According to needed helix angle, set up circular helix 2 on base cylinder 3 surfaces, again these circular helix 2 projections so far above the inscribed cone (pitch circle awl 4), can be set up a conical section, this conical section is exactly a tooth trace 1, generates flank profil 7 along tooth trace 1 then; Flank profil 7 can be shunk to circular cone small end 6 equal proportions from the big end 5 of circular cone, and flank profil 7 also can be shunk to circular cone small end 6 inequality proportions from the big end 5 of circular cone; For preceding a kind of, can adopt following method modeling: set up a series of spherical involutes that comprise the big end 5 of circular cone, circular cone small end 6 earlier, these spherical involute setting-outs are become curved surface, and make the solid figure of a tooth, is needed quantity with this tooth along the central shaft array, can obtain the solid figure that flank profil 7 equal proportions are shunk helical bevel gear.The method of a kind of modeling in back is: when setting up a series of involute, amount according to inequality proportion, or flank profil 7 amount of deformation of trace direction, this amount of deformation is increased in the standard pitch circle transverse tooth thickness of relevant position, obtain new tooth trace 1 profile, carry out setting-out along tooth trace 1 line then, obtain the helical bevel gear solid figure that flank profil 7 inequality proportions are shunk.After the said method modeling, can process and obtain corresponding mould, utilize die molding method can make equidistant helical bevel gear, during the demoulding, because pitch equates that the workpiece after the moulding can rotate the demoulding, can not interfere, workpiece can be deviate from from die cavity smoothly.

Claims

1, equidistant helical bevel gear, its tooth trace is the space curve at conical surface, flank profil is a spherical involute; It is characterized in that: the pitch of described tooth trace on conical surface equates.

2, equidistant helical bevel gear according to claim 1 is characterized in that: flank profil is shunk to cone gear small end equal proportion from the big end of cone gear.

3, equidistant helical bevel gear according to claim 1 is characterized in that: flank profil is shunk to cone gear small end inequality proportion from the big end of cone gear.