JPS62147123A - Joint for vehicle drive motor - Google Patents

Abstract

PURPOSE:To shorten the occupation length of a joint part by forming an internal gear at the bore of a cylindrical part formed at the end of motor shaft, providing a cylindrical shaft fitted at its periphery with a pinion of a speed reduction device and at the bore with another internal gear, and coupling the two by an internal shaft which has coupler gears at both ends. CONSTITUTION:A cylindrical part 25 is formed at the end of a motor shaft 24, and an internal gear 26 is formed at the bore of this cylindrical part, while a cylindrical shaft 29 is provided whose periphery is equipped with a pinion 30 for a speed reduction device and whose bore with another internal gear 31. An intermediate shaft 27 is equipped with couple gears 28 at both ends to mesh with the abovementioned two internal gears 26, 31, and thus the power of the motor is transmitted to the speed reduction device. This should shorten the occupation length of the joint part to lead to increase of the shafting length of the drive motor, increase of the capacity, and reduction of the risk of vibration generations through lightweight construction.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a joint for a pivot motor of a vehicle used in a railway vehicle, etc. [Prior art] Fig. 3 shows the arrangement of a drive device for a vehicle bogie using a conventional joint. 1 is a drive motor, 2 is a gear-shaped joint, and 3 is a deceleration device that decelerates the rotation from this joint and transmits it to the axle 4. 5 is a pair of wheels attached to an axle 4 that supports a bogie (not shown). FIG. 4 is a sectional view showing a conventional joint for a drive motor of a vehicle. 10 is an electric motor shaft. , 11.
12 is a joint gear attached to the electric motor 10 and the pinion shaft 11, each of which is tightened with a nut 13. 14 is a pair of sleeves on both sides, and 14 is a pair of sleeves on both sides. A gear 14a is formed and meshes with the coupling gear 12. 15 and 16 are bolts and nuts that connect both sleeves 14), 17id is a center plate fitted between both sleeves 14, and 18 is a rubber-like elastic material. At the end of the nut 13, a buffer ring is provided at the end of the nut 13, and a gap t is provided between the center plate 17 and the center plate 17.

One is a cover attached to the end of each sleeve 14, 20 is made of a rubber-like elastic material, and the motor shaft 10 and the small float 1 bolt 11 are covered.
It is a sealing ring that is fitted into the ring to prevent foreign matter from entering from the outside. M represents an occupied part of the drive electric uJ machine 1, C represents an occupied part of the joint 2, and R represents an occupied part of the reduction gear device 3.

The operation of the above conventional device is as follows: Drive motor 1
The drive rotation from FA ('
From the A car 14a and the sleeve 14, the other sleeve 14
．． Small gear shaft 11 via internal gear 14a and joint gear 12
is transmitted to.

In vehicles such as railways, the electric motor shaft 10
Although a relative displacement occurs between the pinion shaft 11 and the pinion shaft 11, the gear joint 2 allows the relative displacement between the two shafts and functions to transmit rotation.

This relative displacement includes (a) axial spacing displacement, (b
) Radial displacement of the axial center line, (C) Inclination displacement of the axial center line, 0
There are 3 types.

These various displacement patterns are shown in order in FIG.

(1) The relative spacing displacement shown in the figure allows movement by twice the gap t shown in FIG. In addition, the tilt displacement shown in FIG. 3(C) is allowed at a relative tilt with both sleeves 12 at an angle that is half of the tilt angle of both axes.

[Problem that the invention seeks to solve]

The conventional joint for a drive motor as described above has a problem in that the length of the portion C occupied by the joint 2 becomes large, and the length occupied by the drive motor 1 is limited accordingly.

In particular, in vehicles with narrow gauges, the ratio of the occupied portion C of the joint 2 is large, and the above-mentioned problem becomes important.In the Near East, the drive motor 1 tends to have a larger capacity, and this has become a major hindrance. .

This invention was made to solve these problems, and provides a vehicle in which the length occupied by the joint part is shortened, the axial length of the drive motor is increased, and the capacity of the drive motor can be increased. The purpose is to obtain a joint for a drive motor.

[Means for solving problems]

The joint for a vehicle drive electric machine according to the present invention has a cylindrical part formed at the end of the motor shaft and supported by an electric machine bearing, an internal gear formed in this cylindrical part, and a reduction gear A small gear is formed on the outer periphery of a small gear cylindrical shaft, an internal gear is formed on the inner periphery, this small gear cylindrical shaft is supported by a bearing on the lower side of the reduction gear, and joint floats are provided at both ends of the intermediate shaft. One joint gear is inserted into the internally toothed wheel 83 of the cylindrical portion, and the other joint float is inserted into the internally toothed first wheel of the cylindrical pinion shaft.

[Effect]

In this invention, 'one joint gear of the intermediate shaft meshes with one internal gear in the shaft end of the linear motor, and the other joint gear of the intermediate shaft meshes with the other internal gear in the cylindrical shaft of the small gear of the reduction gear. The gears mesh and the rotation of the drive motor is transmitted to the pinion,
Acting as a flexible joint, the occupied length of the joint part is reduced.

〔Example〕

FIG. 1 shows the arrangement of a drive unit for a bogie portion of a vehicle using this Komei drive motor joint. 21 is a drive chamber supported by a truck (not shown) or a truck and the i-axis side of the vehicle! ?
17, 22 is a gear-shaped joint, and 23 is a speed reduction device a that decelerates the rotation from this joint and transmits it to the axle 4.

FIG. 2 is a sectional view showing a previous embodiment of a joint for a vehicle drive motor according to the present invention. Reference numeral 24 designates an electric motor I-shaft, which has a large diameter end portion, is formed into a cylindrical portion 25, and has one internal gear 26 formed on its inner periphery. 27 is the intermediate shaft, with 1 on both ends.
A pair of joint gears 28 are formed, one of which is the joint gear 28.
8 meshes with one internal gear 26. Two are small gear cylindrical shafts of the reduction gear, a small gear 30 is formed in the middle of the outer periphery, the other internal gear 31 is provided on the inner periphery, and the intermediate shaft 2
'7 meshes with the other joint gear 28. 32 is a motor bearing that supports the cylindrical portion 25 of the motor shaft 24; 33 is a pair of reduction gear side extraction supports that support the small gear cylindrical shaft 29;
4 is a receiving cover attached to the other end of the small gear cylindrical shaft 29; 35 is made of a rubber-like elastic material and is a buffer ring fitted to both end surfaces of the intermediate shaft 27; 36 is made of a rubber-like elastic material and is a cylindrical A pair of sealing plates are attached to the end of the section 25 and one end of the two cylindrical pinion shafts, and the two sheets are stacked on top of each other, and are assembled by shifting the dividing lines of each semicircular part, so that they can be sealed from the outside. prevent the infiltration of foreign matter. M is a portion occupied by the drive motor 21, C3 is a necessary portion occupied by the joint 22, and R is a reduction gear device 23.
The operation of the apparatus of the above embodiment is as follows.

The drive rotation from the drive motor @21 is transmitted from the motor shaft 24 to one internal gear 26. One joint gear 28. Middle 1 ■ Axis 27
, is transmitted to the other internal gear 31 and pinion gear 30 via the other joint gear 28.

Relative displacement occurs between the motor shaft 24 and the small gear cylinder @2, but the joint 22 not only transmits torque but also acts to release the displacement in the same manner as the conventional joint 3 shown in Fig. 5. .

In this way, the gear-shaped joint 22, as shown in FIG.
The length of the occupied part C of the joint part can be shortened to about 30% of the conventional length, and the drive @ electric motor 21 can be made larger in the axial direction.Furthermore, the unique movable part of the joint 22 is Only the intermediate shaft 27 having the gear 28 is used, the moment of inertia is reduced, and the possibility of vibration generation is reduced.

The float part is sufficiently rounded to increase the permissible inclination angle between the internal teeth and the joint teeth, but there is a limit. However, by increasing the length between the joint gears 28 at both ends of the intermediate tlI] 27, the electric motor @ 24 and the small gear cylinder 1'll
It is possible to increase the permissible g range of the radial displacement of the axial center line of 129.

〔Effect of the invention〕

As described above, according to the present invention, the shaft end of the electric motor shaft is formed into a cylindrical portion, one inner cart is formed on the inner periphery, and the small gear of the reduction gear is formed on the outer periphery of the small gear cylindrical shaft. The other internal gear is formed on the inner periphery of this cylindrical shaft, the joint gear is formed on both ends of the intermediate shaft, one joint gear is meshed with one internal gear, and the other joint gear is meshed with the other internal gear. Since the internal gear is engaged with the internal gear, the length occupied by the outer shaft portion is significantly shortened, and the axial length of the drive motor can be increased and the capacity can be increased.

Furthermore, since both external gears are connected by an intermediate shaft and made into a movable part, the weight is reduced, so there is less risk of vibration occurring in the joint.

[Brief explanation of drawings]

Fig. 1 is a layout diagram of a drive device for a bogie section of a vehicle using a joint for a drive electric motor according to the present invention, Fig. 2 is a sectional view of an instant embodiment of a joint for a drive rNJ electric motor according to the present invention, and Fig. 3 is a conventional one. Small moving equipment for vehicle bogie using joints (layout diagram of hill,
FIG. 4 is a cross-sectional view of a conventional joint for a small moving motor, and FIG. 5 is a cross-sectional view showing how the joint of FIG. 4 relieves various displacements between the motor shaft and the small gear shaft. 21... Drive motor, 22... Joint, 23... Speed reduction device, 24...' motor shaft, 25... Cylindrical portion, 26
...One internal gear, 27. Intermediate shaft, 28.. Joint gear, 29.. Small gear cylindrical shaft, 30. Small gear, 31..
The other internal gear, 32°33...bearing. In the drawings, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] The shaft end has a large diameter to form a cylindrical part, one internal gear is formed on the inner periphery of this cylindrical part, and the cylindrical part is a motor shaft supported by a bearing of a drive motor, and a small gear of a reduction gear. One internal gear is formed on the outer periphery, and the other internal gear is formed on the inner periphery.
A small gear cylindrical shaft is supported by a bearing on the reduction gear side, and coupling gears are formed at both ends, one coupling gear meshes with one of the internal gears, and the other coupling gear meshes with the other internal gear. Coupling for vehicle drive motors with interlocking intermediate shafts.