CN205013487U

CN205013487U - Motor shaft of in -band spline

Info

Publication number: CN205013487U
Application number: CN201520440825.5U
Authority: CN
Inventors: 周小平
Original assignee: Ningbo Hi Tech Area Yunsheng Servo Control Technology Co ltd; Ningbo Yunsheng Co Ltd
Current assignee: Ningbo Yunsheng Electric Drive Technology Co ltd
Priority date: 2015-06-25
Filing date: 2015-06-25
Publication date: 2016-02-03
Anticipated expiration: 2025-06-25

Abstract

The utility model provides a motor shaft of in -band spline, includes axis body, internally splined sleeve, and axis body one end is equipped with the blind hole, and internally splined sleeve sets up the recess in inserting the blind hole of axis body on the blind hole wall, and the internally splined sleeve external diameter has a protruding key that links to each other with the spline housing external diameter and the cooperation of axis body hole recess at least. Because the utility model discloses an axis body and an internally splined sleeve section of thick bamboo design respectively, and the internally splined sleeve section of thick bamboo post -treatment that can quench earlier can guarantee that an internally splined sleeve section of thick bamboo possesses the advantage of high accuracy, high rigidity, high strength and high wearing feature. The protruding key and the cooperation of axis body hole recess of an internally splined sleeve section of thick bamboo, axis body and internally splined sleeve wound packages are joined in marriage more portably, and the motor shaft can bear the effect of great moment of torsion and impulsive torque, an internally splined sleeve section of thick bamboo can adopt line cutting process, and the centering of spline external diameter can realize effectively that the installation axiality that makes motor and actuating mechanism be connected is higher with the cooperation precision, and transmission stability is better, and bearing capacity is bigger.

Description

A kind of motor shaft with internal spline

Technical field

The utility model relates to a kind of motor, particularly a kind of motor shaft structure.

Background technique

The mechanical connection manner of motor drive actuator mainly contains two kinds at present: the first the output shaft of motor and the input shaft of actuator is coupled together by coupling; The second is that the output shaft of motor is made internal spline structure, and the input shaft of actuator directly inserts in motor internal spline quill shaft and couples together.Because the second way eliminates intermediate shaft coupling, there is compact structure, transmission stability is good and system cost is low advantage, progressively become the optimal way that motor is connected with actuator, apply more and more extensive.

Existing internal spline motor shaft adopts motor shaft and internal spline integral structure mostly, because motor shaft is general longer, so the internal spline of motor shaft is generally designed to blind hole structure, and the internal spline of blind hole structure not only processing cost is high, precision is low, and internal spline heat treatment difficulty, underloading condition can only be applied to, in actual applications under high pulling torque and impulsive torque condition, due to the defect that internal spline machining accuracy is low, tooth face hardness is low and wear no resistance, cause a large amount of early failue of motor shaft, constrain the extensive use of internal spline motor shaft; Also the method fitted together again after adopting splined sleeve and axis body to process respectively is had, solve the problems referred to above, but be that splined sleeve and axis body are combined by the mode that split is pressed into due to what adopt, the bearing housing of outside is contained on splined sleeve, create so again cooperation place to loosen, the problem that the low reliability of rigidity is not high; Also has the structure adopting integral shaft to add the internal spline motor shaft of splined sleeve, interference fit and fixing pin mode is adopted to bear internal spline torsion, shortcoming is the restriction of external diameter by bearing bore diameter of motor shaft, internal spline is restricted to the wall thickness of axle outer surface, fixing pin and inner spline housing interference fit, female splined shaft all can not bear larger moment of torsion and the effect of impulsive torque, so said structure is suitable only for underloading and the occasion of the torsional interaction that is not hit.

Model utility content

Problem to be solved in the utility model is to provide a kind of motor shaft that can bear band internal spline compared with high pulling torque and impulsive torque effect.

The utility model solves the problems of the technologies described above adopted technological scheme: a kind of motor shaft with internal spline, comprise axis body, inner spline sleeve, it is characterized in that: axis body one end has blind hole, inner spline sleeve is inserted in the blind hole of axis body, and inner spline housing external diameter has a convex key be connected with splined sleeve external diameter and axis body endoporus groove fit at least.

Hardness after above-mentioned inner spline housing heat treatment is HRC25-HRC58, more preferably heat treatment hardness HRC38-HRC54, and optimum is HRC45-HRC52.

Better, above-mentioned spline adopts flank centering.

Better, above-mentioned spline adopts diameter centering.

The beneficial effects of the utility model: because the utility model axis body and inner spline sleeve design respectively, inner spline sleeve can first be quenched aft-loaded airfoil, can ensure that inner spline sleeve possesses the advantage of highi degree of accuracy, high hardness, high strength and high wear resistance.The convex key of inner spline sleeve and axis body endoporus groove fit, axis body and inner spline sleeve are assembled easier, and motor shaft can bear the effect compared with high pulling torque and impulsive torque; Inner spline sleeve can adopt linear cutter, and spline diameter centering can effectively realize, the installation coaxality that motor is connected with actuator and quality of fit higher, transmission stability is better, and bearing capacity is larger.

Accompanying drawing explanation

The three-dimensional explosive view of a kind of motor shaft with internal spline of Fig. 1 the utility model embodiment.

Fig. 2 is the sectional view of a kind of motor shaft with internal spline of the utility model embodiment.

The right elevation of a kind of motor shaft with internal spline of Fig. 3 the utility model embodiment.

The right elevation partial enlarged drawing of a kind of motor shaft with internal spline of Fig. 4 the utility model embodiment.

The sectional view of the convex key of Fig. 5 inner spline housing.

Mark wherein in figure is as follows: 1 axis body; 2 inner spline housings; 3 convex keys; 4 inner spline housing external diameters; 5 grooves; 6 blind holes, 7 internal splines, 8 internal spline grooves.

Embodiment

Below in conjunction with drawings and Examples, the utility model is described in further detail.

As shown in Figure 1, axis body 1 end is provided with a blind hole 6, the hole wall of blind hole 6 is provided with three grooves 5, inner spline housing 2 mesopore is provided with internal spline 7, inner spline housing external diameter 4 surface is provided with three convex keys 3, inner spline housing 2 is arranged in the blind hole 6 of axis body 1, inner spline housing external diameter 4 coordinates with the blind hole 6 of axis body 1, the convex key 3 on inner spline housing external diameter 4 surface coordinates with blind hole 6 further groove 5 of axis body 1, see Fig. 2 and Fig. 3, inner spline housing external diameter 4 coordinates with the blind hole 6 of axis body 1, ensure that axis body 1 and the requirement of inner spline housing 2 coaxality, the convex key 3 of inner spline housing 2 coordinates with the groove 5 of axis body 1 effect bearing high pulling torque and impulsive torque, in order to ensure that inner spline housing 2 has enough intensity, convex key 3 is closely as shown in Figure 4 symmetrical with internal spline groove 8, the first heat treatment of inner spline housing 2 blank reaches hardness HRC45 ~ HRC52, after the internal spline 7 of inner spline housing 2 and inner spline housing external diameter 4 and convex key 3 clamped one time, linear cutter is shaped, ensure that internal spline 7 and the coaxality of inner spline housing external diameter 4 require and convex key 3 relative to the requirement of the position degree of internal spline 7, overcome inner spline housing first shape after heat treated problem on deformation again, ensure that a kind of high-precision requirement of the motor shaft with internal spline,

Above-mentioned convex key 3 can be rectangle, as Fig. 5 a, also can be trapezoidal, and as Fig. 5 b or dome rectangle, as Fig. 5 c and semicircle as Fig. 5 d, secondly the rectangle that most economical is as Fig. 5 a is that ladder diagram 5b or dome rectangle are as Fig. 5 c.

Claims

1. the motor shaft with internal spline, comprise axis body, inner spline housing, it is characterized in that: axis body one end is provided with blind hole, inner spline housing inserts in the blind hole of axis body, blind pore wall arranges groove, and inner spline housing external diameter has a convex key be connected with spline housing external diameter and axis body endoporus groove fit at least.

2. the motor shaft of the band internal spline according to claim l, is characterized in that: described convex key is rectangle, trapezoidal, dome rectangle or semicircle.

3. the motor shaft of the band internal spline according to claim l, is characterized in that: the convex key of described inner spline housing and internal spline groove closely symmetrical.