JP2001304347A - Power transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable phase adjustment from the outside, after the completion of assembly. SOLUTION: A hexagon hole 71 is formed in a differential device side end part 531 of a reduction gear output shaft 53 disposed outside of a reduction gear casing 55. A tool insertion hole 73 is formed in a differential device casing 31 accommodating a differential device 3 and the differential device side end part 531, and a hole-blocking bolt 72 is fitted into the tool insert hole 73 to constitute an opening/closing part at a part of the differential device casing 31. After assembly is completed, the hole-blocking bolt 72 is removed from the differential device casing 31, and a hexagon wrench is inserted from the tool insertion hole 73 and engaged into the hexagon socket 71. The phase adjustment is made, by turning the hexagon wrench to cause a motor shaft 61 to rotate from the outside via the reduction gear output shaft 53, a reduction gear intermediate shaft 52 and a reduction gear input shaft 51.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power transmission device for a vehicle or the like, and more particularly, to a technology for easily and accurately adjusting a phase after assembly is completed.

[0002]

2. Description of the Related Art For example, a mechanism disclosed in Japanese Patent Application Laid-Open No. 9-95149 is known as a system for driving an electric motor connected to an output shaft of a transmission connected to a prime mover. This mechanism attaches an electric motor to the outside of the transmission and transmits the motor output to the transmission via a power transmission member.The power transmission members of the electric motor and the transmission are connected via splines or gears. When assembling by mutual fitting, it is necessary to rotate one power transmission member to perform phase matching.

As a technique for performing this phase adjustment, for example, Japanese Patent Application Laid-Open No. H10-2444979 discloses a method of rotating an electric motor attached to one power transmission member.

[0004]

However, the phase matching method disclosed in Japanese Patent Application Laid-Open No. H10-2444979 requires a power supply device for rotating the electric motor. For this reason, it is possible to assemble it on a production line. However, as disclosed in Japanese Patent Application Laid-Open No. 9-95149, during phase adjustment work in a vehicle mounted state, the wiring of the power supply device is involved in the rotation of the electric motor. May be dangerous.

[0005] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a power transmission device capable of externally performing phase adjustment after assembly is completed.

[0006]

Means for Solving the Problems In order to solve the above problems, the present invention employs the following means. The invention according to claim 1 is a power transmission device (for transmitting power) from a motor shaft (for example, the motor shaft 61 in the first embodiment) to a driven member (for example, the differential 3 in the first embodiment). For example, the motor reduction gear 5 according to the first embodiment is an input shaft (for example, the reduction gear input shaft 5 according to the first embodiment) that is connected to the motor shaft so as not to rotate relatively.
1), an output shaft for rotating the driven member in conjunction with the rotation of the input shaft (for example, the reduction gear output shaft 53 in the first embodiment), and a case for accommodating the input shaft and the output shaft ( For example, the speed reducer case 55 in the first embodiment) is provided, and a part of the output shaft is arranged outside the case, and the outside arrangement portion (for example, the differential gear in the first embodiment) The side end 531) is provided with operated means (for example, the hexagonal hole 71 in the first embodiment) that enables the rotation operation of the output shaft.

In this configuration, when the output shaft rotates, the input shaft rotates following the rotation of the output shaft, and further, the motor shaft rotates following the rotation of the input shaft. The output shaft is rotated by operating the operated portion, but the operated portion is provided on an outer arrangement portion arranged outside the case and can be operated from the outside. Therefore, even after the assembly is completed, the phase can be adjusted by rotating the output shaft from the outside.

[0008] Even if the outer arrangement portion and the driven member are housed in different cases (for example, the differential case 31 in the first embodiment), the case is provided with an opening / closing portion (for example, the first case). If the tool insertion hole 73 and the hole closing bolt 72) in the first embodiment are provided, the output shaft can be rotated by operating the operated portion from the outside by opening the opening / closing portion. Can be performed.

According to a second aspect of the present invention, there is provided a motive power for transmitting power from a motor shaft (for example, the motor shaft 61 in the second embodiment) to a driven member (for example, the differential 3 in the second embodiment). A transmission device (for example, the motor speed reducer 5 in the second embodiment), which is an input shaft (for example, the speed reducer input shaft 51 in the second embodiment) that is connected to the motor shaft so as not to rotate relatively. And an output shaft for rotating the driven member in conjunction with the rotation of the input shaft (for example, the output shaft 53 of the speed reducer in the second embodiment), and an opening and closing unit for accommodating the input shaft and the output shaft. A case (for example, the speed reducer case 55 in the second embodiment), and the output shaft is provided with the opening / closing portion (for example, the tool insertion hole 73 and the hole closing bolt 7 in the first embodiment).
2) Operated means (for example, hexagonal hole 7 in the second embodiment) that enables a turning operation from the outside while opening
1) is provided.

Also in this configuration, when the output shaft rotates, the input shaft rotates in accordance with the rotation of the output shaft, and further, the motor shaft rotates in accordance with the rotation of the input shaft. The output shaft is rotated by operating the operated portion, but the operated portion can be operated from the outside by opening and closing the opening and closing portion of the case housing the output shaft. Therefore, even after the assembly is completed, the phase can be adjusted by rotating the output shaft from the outside.

A third aspect of the present invention relates to a motor shaft (for example, the motor shaft 61 in the third embodiment) and a second drive shaft (for example, the transmission output shaft 2 in the third embodiment).
A power transmission device (for example, the continuously variable transmission 2 and the motor speed reducer 5 in the third embodiment) that transmits power from 2) to a driven member (for example, the differential 3 in the third embodiment). An input shaft (for example, the reduction gear input shaft 51 in the third embodiment) that is connected to the motor shaft so as to be relatively non-rotatable, and an output that rotates the driven member in conjunction with the rotation of the input shaft. A shaft (for example, the reduction gear output shaft 53 in the third embodiment) and a second output shaft (for example, for rotating the driven member in conjunction with the rotation of the second drive shaft)
An intermediate shaft 27 according to the third embodiment) and a case with an opening and closing portion for accommodating the second output shaft (for example, the intermediate shaft case 81 according to the third embodiment); In the state where the opening / closing portion (for example, the tool insertion hole 73 and the hole closing bolt 72 in the third embodiment) is opened, an operated unit (for example, the third unit) that enables a rotation operation from the outside. Is characterized in that the hexagonal hole 71) in the embodiment is provided.

In this configuration, when the intermediate shaft rotates, the differential rotates in conjunction with the rotation of the intermediate shaft, and further, the output shaft rotates in conjunction with the rotation of the differential. When the output shaft rotates, the input shaft is driven to rotate in conjunction therewith, and the motor shaft is further driven to rotate in conjunction with the rotation of the input shaft. The intermediate shaft is rotated by operating the operated part, but the operated part is
By opening the opening / closing part of the case accommodating the intermediate shaft, the case can be operated from the outside. Therefore, even after the assembly is completed, the phase can be adjusted by rotating the intermediate shaft from the outside.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

[First Embodiment] FIG. 1 shows a power transmission system diagram of a hybrid vehicle equipped with a motor speed reducer according to a first embodiment of the power transmission device according to the present invention. This power transmission system includes an engine 1, a continuously variable transmission 2, a differential (driven member) 3, an axle 4, a motor reduction gear (power transmission device) 5, and a motor 6 as main components, and an engine as a power source. Power is transmitted from the motor 1 and the motor 6 to the axle 4 via the continuously variable transmission 2, the motor reducer 5, and the differential 3.

The continuously variable transmission 2 includes a V-type transmission pulley 23 having a variable width on a transmission input shaft 21 and a transmission output shaft 2. Steel belt 2 composed of a pair of steel bands
CVT (Continuosly Va.)
riable Transmission). The continuously variable transmission 2 further includes a forward / reverse switching clutch 25 for switching the traveling direction of the vehicle between forward and reverse, and a starting clutch for turning on / off transmission of driving force from the engine 1 to the axle 4. 26 are provided.

The output gear 26b of the starting clutch 26 has
The input gear 27a of the intermediate shaft (second output shaft) 27 meshes with the output gear 27b of the intermediate shaft 27, and the engine-side input gear 3a of the differential 3 meshes with the input gear 27a. The intermediate shaft 27 transmits engine power from the transmission output shaft 22 to the differential 3 via the start clutch 26.

The differential 3 is a device for giving a differential rotational speed to the left and right wheels with respect to a rotational difference generated between the left and right wheels depending on running conditions, such as when the vehicle turns, and is accommodated in a differential case 31. ing. The differential 3 meshes with the left and right axles 4 at the boss 32c, and the output gear 27b of the intermediate shaft 27 and the reduction gear of the motor reduction gear 5 at each of the engine-side input gear 32a and the motor-side input gear 32b. The output shaft 53 is engaged.

The motor speed reducer 5 includes a speed reducer input shaft (input shaft) 51, a speed reducer intermediate shaft 52, and a speed reducer output shaft (output shaft).
53, and a bearing 54 for rotatably supporting the shafts 51,... Are provided in a speed reducer case (case) 55. A spline 51a is formed at the motor-side end of the speed reducer input shaft 51.
"a" is connected to a spline 61a formed at the outer peripheral end of the motor shaft 61 so as not to rotate relatively.

An end (outside arrangement portion) 531 of the reduction gear output shaft 53 on the side of the differential gear is arranged outside the reduction gear case 55, and the output gear 53b formed on the outer periphery of the differential gear 3 has an output gear 53b. It is in mesh with the motor-side input gear 32b. Further, a hexagonal hole (operated means) 71 with which a hexagonal wrench 100 (see FIG. 4) is engaged is formed on an end surface of the differential device side end 531. The power transmission from the speed reducer input shaft 51 to the speed reducer output shaft 53 is performed via a speed reducer intermediate shaft 52.

The output gear 53b formed at the differential side end 531 of the output shaft 53 of the reduction gear and the input gear 32b at the motor side of the differential 3 are different from each other in that the differential They are engaged in the case 31. In this differential case 31,
The tool insertion hole 73 closed by the hole closing bolt 72 is
When the motor reducer 5 is attached to the differential case 31,
The hexagonal hole 71 is formed at a position where the hexagonal hole 71 can face the extension of the output shaft 53 of the speed reducer.

One of the left and right divided axles 4 rotatably penetrates through the motor speed reducer 5 and the motor 6. More specifically, one axle 4 penetrating the motor 6 passes through through holes 51A and 61A formed coaxially with both the reduction gear input shaft 51 and the motor shaft 61.
The reduction gear input shaft 51 and the motor shaft 61 rotate independently.

In the power transmission system configured as described above, when the transmission input shaft 21 receives engine power via an engine output shaft (second drive shaft) (not shown), the input-side V-type transmission pulley 23 Steel belt 2 by rotation
4, the output-side V-type speed change pulley 23 is driven to rotate,
Power is transmitted to the transmission output shaft 22. In this case, when the starting clutch 26 is set to ON, for example, when engine running is selected during high load such as high-speed running, the power received by the transmission output shaft 22 is transmitted to the intermediate shaft 27 and the differential shaft. It is transmitted to the axle 4 via the motive device 3.

On the other hand, when the starting clutch 26 is set to the off state, for example, when the motor running is selected at the time of parking or middle / low load such as running in an urban area, the differential of the engine power is changed. The transmission to the vessel 3 is interrupted. And
When the motor running is selected, the reduction gear input shaft 51 spline-coupled to the motor shaft 61 so as not to rotate relatively.
Receives the power from the motor 6, and this motor power is transmitted to the axle 4 by the differential unit 3 being driven and rotated via the reduction gear intermediate shaft 52 and the reduction gear output shaft 53.

Although not shown in FIGS. 2 and 3, by attaching a clutch between the motor 6 and the motor reducer 5, or between the motor reducer 5 and the continuously variable transmission 2, the axle The switching of the motor power for the motor 4 may be switched.

Next, referring to FIG. 3 and FIG.
The assembling work of the motor speed reducer 5 and the continuously variable transmission 2 will be described. There are the following two procedures for assembling these elements with each other. The motor 6 and the motor reducer 5 are assembled first, and then the continuously variable transmission 2 is assembled. The continuously variable transmission 2 and the motor reducer 5 are assembled first, and then the motor 6 is assembled.

According to the procedure, the speed reducer output shaft 53
Output gear 53b and the motor-side input gear 32b of the differential 3
It is necessary to assemble while adjusting the meshing phase with
Further, in the case of the procedure, it is necessary to assemble the spline 51a of the reduction gear input shaft 51 and the spline 61a of the motor shaft 61 while matching the engagement phases. In any case, when the motor shaft 61 or the axle 4 is rotated to perform phase matching, the following problems occur.

That is, in order to perform phase matching by rotating the motor shaft 61, it is necessary to newly install a portion for rotating the motor shaft 61 from the outside or to rotate the motor shaft 61 by supplying electric power from the outside. Increase in size, securing power supply,
Security is a concern. Further, when the axle 4 is rotated to perform the phase adjustment, the differential 3 is engaged with the axle 4, so that when one axle 4 is rotated, the other axle 4 is rotated in the reverse direction. Phase adjustment cannot be performed.

However, according to the present embodiment, these problems do not occur. That is, after the motor 6, the motor reducer 5, and the continuously variable transmission 2 are assembled, the hole closing bolt 72 of the differential case 31 is removed, and the hexagon wrench 100 is inserted through the opened tool insertion hole 73. By engaging the hexagonal hole 71 of the reduction gear output shaft 53, the reduction gear output shaft 53 can be rotated from outside.

When the reduction gear output shaft 53 rotates,
The reduction gear intermediate shaft 53 and the reduction gear input shaft 51 rotate in conjunction with the rotation of the reduction gear output shaft 53, and the motor shaft 61 rotates in synchronization with the rotation of the reduction gear input shaft 51. Can be easily and accurately performed.
After the phase adjustment is completed, the hexagon wrench 100 may be extracted from the differential case 31 and the tool insertion hole 73 may be closed with the hole closing bolt 72.

[Second Embodiment] Next, a second embodiment of the present invention will be described with reference to FIG. In this figure, the same components as those in the first embodiment are denoted by the same reference numerals as those in FIG.

In the first embodiment, the differential case 31
In the present embodiment, a tool insertion hole 73 is formed in the speed reducer case 55, and the tool insertion hole 73 is formed with the hole closing bolt 72. It is closed. The tool insertion hole 73 and the hole closing bolt 72 constitute an opening / closing part in a part of the speed reducer case 55.

Further, with the change of the position of the tool insertion hole 73,
In the first embodiment, the differential gear side end face 5 of the reduction gear output shaft 53
The hexagonal hole 71 formed in 3A is a motor-side end surface 53.
B. Other basic configurations are the same as those of the first embodiment. With such a configuration,
By the same operation as in the first embodiment, after the assembly is completed, the reduction gear output shaft 53 is rotated from outside using the hexagon wrench 100, so that the phase adjustment can be performed easily and with high accuracy.

[Third Embodiment] Next, a third embodiment of the present invention will be described with reference to FIG. In this figure, the same components as those in the first embodiment are denoted by the same reference numerals as those in FIG.

In the first or second embodiment, a tool insertion hole 73 is formed in the differential case 31 or the speed reducer case 55 and is closed by the hole closing bolt 72. In the embodiment, a tool insertion hole 73 is formed in the intermediate shaft case 81, and this is closed by a hole closing bolt 72. The tool insertion hole 73 and the hole closing bolt 72 constitute an opening / closing part in a part of the intermediate shaft case 81.

Further, with the change of the position of the tool insertion hole 73,
The hexagonal hole 72 formed in the differential-side end face 53A or the motor-side end face 53B of the speed reducer output shaft 53 in the first or second embodiment is formed in the motor-side end face 27A of the intermediate shaft 27. . Other basic configurations are the same as those of the first and second embodiments.

In such a configuration, when the intermediate shaft 27 is rotated, the speed reducer output shaft 53 is driven to rotate via the differential gear 3 meshing with the intermediate shaft 27, and thereafter, the same operation as in the first embodiment is performed. The rotation is transmitted to the motor shaft 61 by the action.
Therefore, also in the present embodiment, the phase adjustment can be performed easily and with high accuracy by rotating the intermediate shaft 27 from the outside using the hexagon wrench 100 after the assembly is completed.

Instead of rotating the intermediate shaft 27 directly, an operated means such as a hexagonal hole is provided on the speedometer gear 82 meshing with the end of the intermediate shaft 27, and the speedometer gear 82 is rotated from the outside. It may be operable. When the speedometer gear 82 is rotated from the outside, the intermediate shaft 27 is driven to rotate, and thereafter rotation is transmitted to the motor shaft 61 by the same operation as described above.
Even after the assembly is completed, the phase can be adjusted easily and with high accuracy.

Note that the present invention is not limited to the above-described embodiment, but may be configured as follows. (1) Hex wrench 10 as a tool for phase alignment
Use other general tools or special tools other than 0.
In this case, the hexagonal hole 72 is changed to an appropriate shape that can be engaged with another general tool or dedicated tool.

(2) The diameter of the tool insertion hole 73 is increased to a size in which a hand can be inserted, and a projection (operated means) or the like is provided on the reduction gear output shaft 53 or the intermediate shaft 27.
Even in such a case, by inserting a hand into the differential case 31 or the intermediate shaft case 81 from the tool insertion hole 73 and manually rotating the speed reducer output shaft 53 or the intermediate shaft 27 via the protrusion, , The motor shaft 61 can be rotated.

[0040]

As is apparent from the above description, according to the present invention, the following effects can be obtained. (1) According to the first aspect of the present invention, the output shaft capable of rotating the motor shaft is rotated by operating the operated means, and the operated means is provided on the outer arrangement portion arranged outside the case. Therefore, even after the assembly is completed, the phase can be adjusted easily and with high accuracy.

(2) According to the second aspect of the present invention, the output shaft capable of rotating the motor shaft is rotated by operating the operated means, and the operated means is in a state in which the open / close portion of the case is opened. Therefore, the phase can be easily and accurately adjusted even after the assembly is completed.

(3) According to the third aspect of the present invention, the intermediate shaft capable of rotating the motor shaft is rotated by operating the operated member, and the operated member is in a state in which the opening / closing portion of the case is opened. Therefore, the phase can be easily and accurately adjusted even after the assembly is completed.

[Brief description of the drawings]

FIG. 1 is a power transmission system diagram of a hybrid vehicle including a motor speed reducer according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing the motor speed reducer and its peripheral devices according to the first embodiment of the present invention.

FIG. 3 is an enlarged view of a main part of FIG. 2;

FIG. 4 is a perspective view showing a state before assembling a continuously variable transmission, a motor speed reducer, and a motor.

FIG. 5 is an enlarged view of a main part of a longitudinal section showing a second embodiment of the present invention.

FIG. 6 is an enlarged view of a main part of a longitudinal section showing a third embodiment of the present invention.

[Explanation of symbols]

 2 Continuously variable transmission (power transmission device) 3 Differential gear (driven member) 5 Motor reduction gear (power transmission device) 27 Intermediate shaft (second output shaft) 51 Reduction gear input shaft (input shaft) 53 Reduction gear output shaft (Output shaft) 55 Reduction gear case (case) 61 Motor shaft 71 Hexagon hole (operated means) 72 Hole closing bolt (opening / closing part) 73 Tool insertion hole (opening / closing part) 81 Intermediate shaft case (case) 531 Differential device Side end (outside arrangement)

Claims (3)

[Claims] 1. A power transmission device for transmitting power from a motor shaft to a driven member, comprising: an input shaft connected to the motor shaft so that the driven shaft cannot rotate relative to the input shaft; An output shaft to be rotated; and a case accommodating the input shaft and the output shaft. A part of the output shaft is arranged outside the case, and the outer arrangement portion is capable of rotating the output shaft. A power transmission device characterized in that an operated means is provided. 2. A power transmission device for transmitting power from a motor shaft to a driven member, comprising: an input shaft connected to the motor shaft so as not to rotate relative to the motor shaft; An output shaft to be rotated, and a case with an opening / closing portion for accommodating the input shaft and the output shaft, wherein the output shaft is operated to enable a rotation operation from outside with the opening / closing portion opened. A power transmission device comprising means. 3. A power transmission device for transmitting power from a motor shaft and a second drive shaft to a driven member, wherein the input shaft is connected to the motor shaft so that the input shaft cannot rotate relative to the input shaft. An output shaft for rotating the driven member, a second output shaft for rotating the driven member in conjunction with the rotation of the second drive shaft, and a case with an opening / closing portion for accommodating these shafts. A power transmission device, characterized in that the second output shaft is provided with operated means that enables a turning operation from the outside with the opening / closing part opened.