JP2005282646A - Driving force transmission device - Google Patents

Driving force transmission device Download PDF

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Publication number
JP2005282646A
JP2005282646A JP2004094423A JP2004094423A JP2005282646A JP 2005282646 A JP2005282646 A JP 2005282646A JP 2004094423 A JP2004094423 A JP 2004094423A JP 2004094423 A JP2004094423 A JP 2004094423A JP 2005282646 A JP2005282646 A JP 2005282646A
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JP
Japan
Prior art keywords
case
shaft
differential
drive
motor
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Pending
Application number
JP2004094423A
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Japanese (ja)
Inventor
Munenori Onizuka
宗徳 鬼塚
Original Assignee
Toyota Industries Corp
株式会社豊田自動織機
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Publication date
Application filed by Toyota Industries Corp, 株式会社豊田自動織機 filed Critical Toyota Industries Corp
Priority to JP2004094423A priority Critical patent/JP2005282646A/en
Publication of JP2005282646A publication Critical patent/JP2005282646A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/04Features relating to lubrication or cooling or heating
    • F16H57/0457Splash lubrication

Abstract

A driving force transmission device that saves space, improves productivity and reduces manufacturing costs, and eliminates stirring of lubricating oil to prevent output loss and increase in lubricating oil temperature. The provision of power transmission devices.
Reduction mechanisms 30 and 39 for transmitting the output of a drive motor 11 to drive wheels 20 and 21 are provided, and a differential mechanism 41 for adjusting the differential between the drive wheels 20 and 21 is provided with the drive motor 11 and the reduction mechanism 30. And a motor shaft 12 connected to a drive shaft 31 protruding from the speed reduction mechanism case 26 toward the drive motor 11 is driven. A case provided in the motor 11, the axle shaft 19 concentric with the drive shaft 31 is built in the motor shaft 12, and a differential mechanism 41 is provided between the drive shaft 31 and the axle shaft 19 to cover the differential mechanism 41. The part 14 is integrally formed with the motor shaft 12, and a case cover 48 that seals the case part 14 is provided.
[Selection] Figure 2

Description

  The present invention relates to a drive force transmission device, and in particular, includes a reduction mechanism that decelerates the output of a drive motor and transmits the output to drive wheels of a vehicle, and a differential mechanism that adjusts the differential of the drive wheels when the vehicle turns. The present invention relates to a driving force transmission device.

  Generally, in an electrically driven vehicle using a drive motor, the output of the motor shaft of the drive motor is decelerated and transmitted to the left and right drive wheels, and the differential between the left and right drive wheels that occurs when the vehicle turns. In many cases, a driving force transmission device including a differential mechanism that absorbs the noise is provided (see, for example, Patent Document 1).

Further, as another driving force transmission device, for example, there is a driving force transmission device 60 shown in FIG.
In the driving force transmission device 60, a differential mechanism 63 is accommodated in a speed reduction mechanism case 62 that covers the speed reduction mechanism 61, and a drive shaft 64 provided in the differential mechanism 63 is also accommodated in the speed reduction mechanism case 62. Yes.
The motor shaft 66 of the drive motor 65 in the drive force transmission device 60 has a cylindrical shape, and an axle shaft 67 is built in the motor shaft 66.
The motor shaft 66 is provided in the speed reduction mechanism case 62, and the drive shaft 64 and the axle shaft 67 are coaxial with each other so as to face each other in the speed reduction mechanism case 62.

Further, a differential mechanism 63 composed of a plurality of differential gears is provided between the drive shaft 64 and the axle shaft 67, and a case 68 that covers the differential mechanism 63 is provided.
The connection between the case 68 and the motor shaft 66 is realized by spline fitting.
The drive shaft 64 is connected to a speed reduction mechanism 61 composed of a plurality of speed reduction gears, and can reduce the output of the drive motor 65 and transmit it to drive wheels (not shown) provided in the hub 69. It has become.
Lubricating oil is filled in the speed reduction mechanism case 62 of the driving force transmission mechanism 60 so that the speed reduction mechanism 61 and the differential mechanism 63 are lubricated.
JP 2001-39174 A (page 3-5, FIG. 1)

However, in the driving force transmission device shown in FIG. 7, the motor shaft and the case must be separate parts, and the motor shaft and the case must be connected by spline fitting.
When connecting the motor shaft and the case by spline fitting, there is a problem that the space in the axial direction is widened and complicated processing is required, resulting in an increase in manufacturing cost and complicated assembly work.
By the way, when trying to integrate the motor shaft and the case, in order to enable the assembly of the power transmission device, an opening having a relatively large diameter that allows the case to be inserted into the case for the speed reduction mechanism. It is necessary to install in the case.
Providing such a large-diameter opening requires a large-diameter bearing or seal member, and does not immediately reduce the manufacturing cost.
In addition, since the case covering the differential mechanism has a larger diameter than the motor shaft or the like, rotating at high speed in the case for the speed reduction mechanism filled with the lubricating oil can cause an output loss or a loss due to the stirring of the lubricating oil. There are problems such as incurring a temperature rise in the lubricating oil.

  The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to save space in the driving force transmission device, and to improve productivity and reduce manufacturing costs. It is an object of the present invention to provide a driving force transmission device that can prevent output oil loss and increase in lubricating oil temperature by eliminating stirring of lubricating oil by a mechanism.

In order to achieve the above object, the invention according to claim 1 is provided with a speed reduction mechanism that decelerates the output of the drive motor and transmits it to the drive wheels of the vehicle, and the difference for adjusting the differential of the drive wheels when the vehicle turns. In the driving force transmission device provided with a moving mechanism between the drive motor and the speed reduction mechanism, a speed reduction mechanism case that houses the speed reduction mechanism is provided, and a drive shaft provided in the speed reduction mechanism is a case for the speed reduction mechanism. A motor shaft protruding from the drive motor side and connected to the drive shaft is provided in the drive motor, an axle shaft concentric with the drive shaft is built in the motor shaft, and a differential mechanism Is provided between the drive shaft and the axle shaft, and a case cover that covers the differential mechanism is formed integrally with the motor shaft, and seals the case portion. According to the first aspect of the present invention, the differential mechanism provided between the axle shaft and the drive shaft in the motor shaft is disposed outside the case for the speed reduction mechanism without lubrication oil. As a result, the case portion covering the differential mechanism can be formed integrally with the motor shaft, and space saving in the axial direction of the driving force transmission device can be achieved.
Moreover, leakage of the lubricating oil in the differential mechanism can be prevented by the case cover that seals the case portion.

According to a second aspect of the present invention, in the driving force transmission device according to the first aspect, lubricating oil is filled in the speed reduction mechanism case, and an end portion of the motor shaft on the speed reduction mechanism side is provided in the speed reduction mechanism case. The motor shaft is provided with a lubricating oil supply path that is supported by a shaft and supplies lubricating oil from the speed reduction mechanism to the differential mechanism.
According to the second aspect of the present invention, the lubricating oil in the case for the speed reduction mechanism is supplied to the differential mechanism through the lubricating oil supply path provided in the motor shaft. Is ensured by using the lubricating oil in the case for the speed reduction mechanism.

According to a third aspect of the present invention, in the driving force transmission device according to the second aspect, a seal member that seals the lubricating oil of the differential mechanism is provided between the case portion and the case cover. Features.
According to the invention described in claim 3, since the seal member provided between the case portion and the case cover seals the lubricating oil of the differential mechanism, the leakage of the lubricating oil in the differential mechanism to the outside of the case portion. Can be reliably prevented.

According to a fourth aspect of the present invention, in the driving force transmission device according to any one of the first to third aspects, a cover fixing means for fixing the case cover to the case portion is provided. .
According to the invention described in claim 4, since the case cover is fixed to the case portion by the cover fixing means, the case cover does not fall off even if the motor shaft rotates, and if the cover fixing means is released. Since maintenance on the differential mechanism is possible, maintenance work on the differential mechanism is facilitated.

  According to the present invention, while saving space in the driving force transmission device, it is possible to improve productivity and reduce manufacturing costs, and to eliminate the stirring of the lubricating oil by the differential mechanism to reduce the output loss and the lubricating oil temperature. Can be prevented from rising.

A driving force transmission device according to an embodiment of the present invention will be described below with reference to FIGS.
The driving force transmission device of this embodiment is an example applied to a battery forklift as an electrically driven vehicle. FIG. 1 is a cutaway view of a main part of a front axle including a driving force transmission device 10 according to this embodiment. It is the shown top view.
The driving force transmission device 10 drives left and right driving wheels 20 and 21 by a single driving motor 11 disposed near the center of the front of the vehicle body.
A differential mechanism 41, which will be described later, is disposed on one side of the drive motor 11 (left side in FIG. 1).
Further, the speed reduction mechanism 30 accommodated in the speed reduction mechanism case 26 is disposed outside the differential mechanism 41, and the left drive wheel 20 is disposed outside the speed reduction mechanism 30.
On the other hand, on the other side (right side in FIG. 1) of the drive motor 11, a speed reduction mechanism 39 housed in another speed reduction mechanism case 22, and the right drive wheel 21 is disposed outside the speed reduction mechanism 39.

The drive motor 11 will be described. The drive motor 11 includes a motor shaft 12, a rotor 16 (rotor), and a stator 17 (stator). The drive motor 11 is covered with a motor cover 18. Yes.
The rotor 16 and the motor shaft 12 rotate integrally, and the motor shaft 12 is disposed in a direction that coincides with the width direction of the vehicle body.
The shaft end on one side (left side in FIG. 1) of the motor shaft 12 is pivotally supported by the speed reduction mechanism case 26, and the shaft end on the other side (right side in FIG. 1) is the speed reduction mechanism case. 22 is pivotally supported.
Further, the motor shaft 12 is formed with a hollow portion penetrating in the axial direction so as to be cylindrical, and an axle shaft 19 longer than the length of the motor shaft 12 is built in the hollow portion.
One end (left side in FIG. 1) of the axle shaft 19 remains in the hollow portion of the motor shaft 12, and the other end (right side in FIG. 1) is connected to a drive shaft 40 provided in the speed reduction mechanism 39. ing.

A case portion 14 is formed between a shaft end portion on one side (left side in FIG. 1) of the motor shaft 12 and the drive motor 11 to cover a differential mechanism described later.
Here, as shown in FIG. 2, for convenience of explanation, the portion excluding the case portion 14 of the motor shaft 12, that is, the portion closer to the drive motor 11 than the case portion 14 is the shaft portion 13, and is decelerated from the case portion 14. A portion on the mechanism 30 side is referred to as a shaft stopper 15.
The case portion 14 has an outer diameter larger than the outer diameters of the shaft portion 13 and the shaft support portion 15, and a space that covers a differential mechanism described later is formed in the case portion 14 so as to communicate with the hollow portion. Yes.
Long opening holes 14a are provided on both sides of the case portion 14, and the constituent members of the differential mechanism 14 can be assembled through the opening windows 14a.

Next, the speed reduction mechanism cases 22 and 26 will be described. In this embodiment, a speed reduction mechanism case 22 on the right drive wheel 21 side and a speed reduction mechanism case 26 on the left drive wheel 20 side are provided.
Although the speed reduction mechanism case 22 on the right drive wheel 21 side accommodates the speed reduction mechanism 39 for the right drive wheel 21, the motor side case 23 closest to the drive motor 11 and the right drive wheel as shown in FIG. The driving wheel side case 25 closest to 21, and the intermediate case 24 installed between the motor side case 23 and the driving wheel side case 25.
Similarly, the speed reduction mechanism case 26 on the left drive wheel 20 side includes a motor side case 27, an intermediate case 28, and a drive wheel side case 29.
The speed reduction mechanism case 26 on the left drive wheel 20 side houses a speed reduction mechanism 30 connected to the motor shaft 12 that penetrates the motor side case 27.
A drive shaft 31 is accommodated in the motor side case 27 of the speed reduction mechanism case 26 on the left drive wheel 20 side, and the shaft end portion on the drive motor 11 side of the drive shaft 31 is shown in FIGS. 2 and 3. As described above, the insertion hole 27 b of the partition wall 27 a of the motor-side case 27 passes through the hollow portion of the motor shaft 12 and faces the shaft end portion of the axle shaft 19.

As shown in FIG. 2, a shaft gear 32 is provided at the shaft end of the drive shaft 31 on the drive wheel 20 side. The shaft gear 32 is accommodated in the intermediate case 28 and is rotatably supported. Is engaged with the reduction gear 33.
A sun gear 34 is provided at the shaft portion of the reduction gear 33, and the sun gear 34 meshes with a plurality of planetary gears 35 housed in the drive wheel side case 29.
The planetary gear 35 is provided on a carrier pin 36 a provided on the carrier 36, but the carrier 36 is rotatable with respect to the drive wheel side case 29.
A hub 37 is fixed to the shaft portion of the carrier 36 on the drive wheel 20 side as an output shaft, and the left drive wheel 20 is attached to the hub 37.
Thus, it can be said that the speed reduction mechanism 30 of the power transmission device 10 of this embodiment includes the drive shaft 31, the shaft gear 32, the speed reduction gear 33, the sun gear 34, the planetary gear 35, and the carrier 36.
The drive shaft 31 is provided with braking means (not shown) for braking the rotation of the drive shaft 31, and the running vehicle can be braked by operating the braking means.
The speed reduction mechanism cases 22 and 26 are substantially sealed, and the speed reduction mechanism cases 22 and 26 are filled with lubricating oil.

Next, the differential mechanism 41 will be described.
As described above, in the hollow portion of the motor shaft 12, the shaft end portion on the drive motor 11 side of the drive shaft 31 is opposed to the shaft end portion of the axle shaft 19, but between the axle shaft 19 and the drive shaft 31. Is provided with a differential mechanism 41.
A differential bevel gear 42 is fixed to the shaft end portion of the axle shaft 19 in the motor shaft 12, and another differential bevel gear 43 is similarly fixed to the shaft end portion of the drive shaft 31.
The pinion shaft 44 is pivotally supported by the case portion 14 formed on the motor shaft 12 so as to be sandwiched between the axle end portions of the axle shaft 19 and the drive shaft 31, and a pair of difference is provided on both sides of the pinion shaft 44. A moving bevel gear 45 is fixed, and the differential bevel gear 45 meshes with the differential bevel gears 42 and 43.
These differential bevel gears 42, 43, 45 and the pinion shaft 44 can be assembled through the opening window 14a of the case portion 14 shown in FIG.
The differential mechanism 41 of this embodiment is configured by the plurality of differential bevel gears 42, 43, and 45, and absorbs the differential between the left and right drive wheels 20 and 21 that occurs when the vehicle turns.

In this embodiment, a lubricating oil supply path 46 for supplying lubricating oil to the speed reduction mechanism case 26 to the differential mechanism 41 is provided.
A slight gap is formed between the shaft support portion 15 of the motor shaft 12 and the drive shaft 31, and this gap functions as the lubricating oil supply path 46.
A similar gap is also formed between the axle shaft 19 and the shaft portion 13, and this gap functions as another lubricating oil supply passage 47, and the speed reduction mechanism on the differential mechanism 41 and the right drive wheel 21 side. The passage of lubricating oil in the case 22 is realized.

In the driving force transmission device 10 of this embodiment, a case cover 48 that seals the case portion 14 is provided.
The case cover 48 is for preventing the lubricating oil in the differential mechanism 41 from leaking from the case portion 14.
The case cover 48 has a cylindrical shape with both sides open, and an inner diameter corresponding to the outer diameter of the case portion 14 is set.
A locking portion 48 a that is bent so as to be locked to the step surface 14 b between the case portion 14 and the shaft support portion 15 is formed at the end of the case cover 48 on the left drive wheel 20 side.
Furthermore, as shown in FIG. 4, two notches 14d are formed at the outer diameter end of the stepped surface 14c between the case portion 14 and the shaft portion 13 so as to correspond to these notches 14d. In addition, a caulking portion 48 b is provided at the end of the case cover 48 on the right drive wheel 21 side.
Therefore, in this embodiment, it can be said that the locking portion 48 a and the caulking portion 48 b of the case cover 48 constitute case fixing means for fixing the case cover 48 to the case portion 14.

Further, the case cover 48 is devised so as to prevent the lubricating oil in the differential mechanism 41 from leaking more reliably from the case portion 14.
As shown in FIGS. 3 and 4, a pair of O-rings 49 as seal members are interposed between the case portion 14 and the case cover 48, and the case cover 48 is attached to the case portion 14. The lubricating oil leaking from the opening window 14 a of the portion 14 can be sealed between the case portion 14 and the case cover 48.
The shaft support 15 is pivotally supported by a bearing 27c mounted on the motor side case 27, but an oil seal 27d is mounted on the left wheel 20 side of the bearing 27c, and the lubricating oil in the speed reduction mechanism case 26 is removed. It is intended not to leak to the motor cover 18 side.

Next, the operation of the driving force transmission device 10 according to this embodiment will be described.
The motor shaft 12 is rotated by driving the drive motor 11, and the axle shaft 19 and the drive shafts 31 and 40 are rotated with the rotation of the motor shaft 12.
The rotation of the axle 19 shaft and the drive shafts 31 and 40 is decelerated via the left and right deceleration mechanisms 30 and 39, respectively, and the decelerated output is transmitted to the drive wheels 20 and 21, and the vehicle is driven by the rotation of the drive wheels 20 and 21. Runs.
At this time, since the motor shaft 12 including the case portion 14 is located outside the speed reduction mechanism case 26, the lubricating oil in the speed reduction mechanism case 26 is not stirred even when the motor shaft 12 rotates.
When the traveling vehicle turns, the differential mechanism 41 absorbs the differential between the left and right drive wheels 20 and 21.
Then, the lubricating oil in the speed reduction mechanism case 26 is supplied to the differential mechanism 41 through the gap between the shaft support portion 15 and the drive shaft 31.
The case cover 48 attached to the case portion 14 is rotated with the rotation of the motor shaft 12, and the O-ring 49 as a seal member is attached, so that the lubricating oil is supplied from the opening window 14 a of the case portion 14 to the motor cover. There is no leakage to the 18 side.

The driving force transmission device according to this embodiment has the following effects.
(1) The differential mechanism 41 provided between the axle shaft 19 and the drive shaft 31 in the motor shaft 12 is disposed outside the speed reduction mechanism case 26 without lubricating oil, thereby covering the differential mechanism 41. The case portion 14 can be formed integrally with the motor shaft 12, and leakage of lubricating oil in the differential mechanism 41 can be prevented by the case cover 48 that seals the case portion 14.
(2) Since the lubricating oil in the speed reduction mechanism case 26 is supplied to the differential mechanism 41 through the lubricating oil supply passage 46 provided in the motor shaft 12, the lubricating oil necessary for the differential mechanism 41 is reduced. This is ensured by utilizing the lubricating oil in the mechanism case 26.
(3) Since the seal member 49 provided between the case portion 14 and the case cover 48 seals the lubricating oil of the differential mechanism 41, the leakage of the lubricating oil in the differential mechanism 41 to the outside of the case portion 14 is ensured. Can be prevented.

(4) Since the case cover 48 is fixed to the case portion 14 by the cover fixing means, even if the motor shaft 12 suddenly rotates or stops suddenly, the case cover 48 does not fall off or be displaced from the case cover 14. In addition, if the cover fixing means of the case cover 48 is released, maintenance for the differential mechanism 41 becomes possible, and maintenance work for the differential mechanism 41 becomes easy.
(5) By integrating the motor shaft 12 and the case portion 14 that covers the differential mechanism 41, the productivity of the driving force transmission device 10 can be improved and the manufacturing cost can be reduced. Is disposed outside the speed reduction mechanism case 26, the stirring of the lubricating oil by the differential mechanism 41 can be eliminated, and the energy loss and the increase in the lubricating oil temperature can be suppressed.
(6) By integrating the motor shaft 12 and the case portion 14 that covers the differential mechanism 41, the differential mechanism 41 can be disposed close to the rotor 16 of the drive motor 11, Space saving in the axial direction of the driving force transmission device (the width direction of the vehicle body) can be achieved, and the degree of freedom of design around the front axle is improved.

(Example 1)
Next, another example 1 of the case cover 51 will be described.
In the case cover 48 of the previous embodiment, the O-ring 49 is used for sealing the lubricating oil and the caulking portion 48b is formed as the cover fixing means. However, for example, the case cover 51 shown in FIG. 5 may be used. .
In this alternative example 1, for convenience of explanation, a part of the reference numerals used in the previous embodiment is used in common, the description of the common or similar configurations is omitted, and the description of the previous embodiment is used.
Here, rubber seals 52 and 53 having a function as a seal member and a cover fixing means are fixed near both ends of the case portion 14.
The rubber seal 52 on the speed reduction mechanism 30 side is provided with a locking groove 52a coinciding with the direction crossing the motor shaft 12, while the rubber seal 53 on the drive motor 11 side is provided with an axial direction of the motor shaft 12. A matching locking groove 52a is provided.

On the other hand, a bent locking portion 51a corresponding to the locking groove 52a is provided on the speed reduction mechanism 30 side of the case cover 51, and a locking corresponding to the locking groove 52a is provided on the drive motor 11 side of the case cover 51. A portion 51b is formed.
Therefore, when the locking portions 51a and 51b of the case cover 51 are fitted in the corresponding locking grooves 52a and 53a, the case cover 51 is fixed to the case portion 14 and the lubricating oil leaks to the outside of the case cover 51. Sealed without taking out.
When the rubber seals 52 and 53 are used, it is not necessary to provide the notch 14 d in the case part 14, and the case cover 51 can be attached by fixing the rubber seals 52 and 53 to the case part 14.

(Example 2)
Next, a case cover 55 according to another example 2 will be described.
Although the case cover 48 according to the previous embodiment and the case cover 51 according to the other example 1 are single members, for example, as a composite case cover 55 composed of a plurality of members as shown in FIG. Good.
In this second example, for convenience of explanation, some of the reference numerals used in the previous embodiment are used in common, the description of the common or similar configurations is omitted, and the description of the previous embodiment is cited.
Here, the case cover 55 is formed by connecting a pair of left and right cover members 56 with fastening bolts 57 and nuts 58.

The cover member 56 will be described. The cover member 56 has a cylindrical shape, and an engaging portion 56a bent inward is formed at one end, and a connecting portion bent outward in a flange shape at the other end. 56b is formed.
The connection portion 56b has a plurality of through holes 56c through which bolts are inserted.
In a state where the cover member 56 is attached to the case portion 14, an O-ring 59 as a seal member is attached so as to be positioned inside the locking portion 56 a of the cover member 56 and on the outer periphery of the case portion 14.
By aligning the positions of the through holes 56c of the cover members 56 facing each other and passing the bolts 57 through the through holes 56c and screwing the nuts 58 into the bolts 57, the cover members 56 are connected to form the case cover 55. Function.
Therefore, the case fixing means according to the second example includes the bolt 57 and the nut 58, the locking portion 56a of the cover member 56, the connection portion 56b, and the through hole 56c.
According to the composite case cover 55, it is not necessary to provide the notch 14d for locking the case cover 55 to the case portion 14 of the motor shaft 12.

The present invention is not limited to the above-described embodiment, and various modifications are possible within the scope of the gist of the invention. For example, the following modifications may be made.
In the above embodiment, the driving force transmission device for a battery forklift is used. However, the driving force transmission device for an electrically driven vehicle can also be applied.
In the above embodiment, the speed reduction mechanism using a planetary gear is used as the speed reduction mechanism. However, the type and form of the speed reduction mechanism are not particularly limited, and at least a speed reduction mechanism suitable for reducing the output of the drive motor. Good.

It is the top view which fractured | ruptured and showed the principal part of the front axle containing the driving force transmission apparatus which concerns on 1st Embodiment. It is a top view which fractures | ruptures and shows the principal part of the driving force transmission apparatus which concerns on 1st Embodiment. It is a top view which fractures | ruptures and shows the differential mechanism of 1st Embodiment. It is a perspective view which fractures | ruptures and shows the case part and case cover of 1st Embodiment. It is a top view which fractures | ruptures and shows the case cover and case part which concern on another example 2. FIG. It is a top view which fractures | ruptures and shows the case cover and case part which concern on the other example 3. It is a top view which fractures | ruptures and shows the conventional driving force transmission apparatus.

Explanation of symbols

10, 60 Driving force transmission device 11, 65 Driving motor 12, 66 Motor shaft 14 Case portion 14d Notch 19, 67 Axle shaft 22, 26, 62 Reduction mechanism case 30, 39, 61 Reduction mechanism 31, 64 Drive shaft 41 Differential mechanism 46, 47 Lubricating oil supply path 48, 51, 55 Case cover 48a, 51a, 51b Locking part 48b Clamping part 49, 59 O-ring 52, 53 Rubber seal 57 Bolt 58 Nut 68 Case

Claims (4)

  1. A reduction mechanism that decelerates the output of the drive motor and transmits it to the drive wheels of the vehicle is provided, and a differential mechanism that adjusts the differential of the drive wheels when the vehicle turns is provided between the drive motor and the reduction mechanism. Driving force transmission device,
    A speed reduction mechanism case that houses the speed reduction mechanism is provided, and a drive shaft provided in the speed reduction mechanism protrudes from the speed reduction mechanism case toward the drive motor, and a motor shaft connected to the drive shaft includes the motor shaft. Provided in the drive motor,
    An axle shaft concentric with the drive shaft is built in the motor shaft, and a differential mechanism is provided between the drive shaft and the axle shaft,
    A driving force transmission device, wherein a case portion covering the differential mechanism is formed integrally with the motor shaft, and a case cover for sealing the case portion is provided.
  2. Lubricating oil is filled in the case for the speed reduction mechanism, an end of the motor shaft on the speed reduction mechanism side is pivotally supported by the speed reduction mechanism case, and lubricating oil is supplied from the speed reduction mechanism to the differential mechanism. 2. The driving force transmission device according to claim 1, wherein a lubricating oil supply passage is provided on the motor shaft.
  3. The driving force transmission device according to claim 2, wherein a seal member that seals lubricating oil of the differential mechanism is provided between the case portion and the case cover.
  4. The driving force transmission device according to any one of claims 1 to 3, further comprising cover fixing means for fixing the case cover to the case portion.
JP2004094423A 2004-03-29 2004-03-29 Driving force transmission device Pending JP2005282646A (en)

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Application Number Priority Date Filing Date Title
JP2004094423A JP2005282646A (en) 2004-03-29 2004-03-29 Driving force transmission device

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007097085A1 (en) * 2006-02-20 2007-08-30 Ntn Corporation Automobile drive unit
JP2008014350A (en) * 2006-07-04 2008-01-24 Hitachi Ltd Propeller shaft
JP2010168035A (en) * 2009-01-21 2010-08-05 Dr Ing Hcf Porsche Ag Drive axle
JP2011230755A (en) * 2010-04-23 2011-11-17 Dr Ing Hcf Porsche Ag Vehicle having electric drive unit
CN103842692A (en) * 2011-09-30 2014-06-04 吉凯恩传动系统雪平公司 Clutch assembly with deoiling unit
CN104760500A (en) * 2014-01-06 2015-07-08 株式会社捷太格特 Vehicle driving force distribution device
WO2016185799A1 (en) * 2015-05-20 2016-11-24 ヤンマー株式会社 Power transmitting device for working vehicle

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007097085A1 (en) * 2006-02-20 2007-08-30 Ntn Corporation Automobile drive unit
JP2008014350A (en) * 2006-07-04 2008-01-24 Hitachi Ltd Propeller shaft
JP2010168035A (en) * 2009-01-21 2010-08-05 Dr Ing Hcf Porsche Ag Drive axle
JP2011230755A (en) * 2010-04-23 2011-11-17 Dr Ing Hcf Porsche Ag Vehicle having electric drive unit
CN103842692A (en) * 2011-09-30 2014-06-04 吉凯恩传动系统雪平公司 Clutch assembly with deoiling unit
CN104760500A (en) * 2014-01-06 2015-07-08 株式会社捷太格特 Vehicle driving force distribution device
WO2016185799A1 (en) * 2015-05-20 2016-11-24 ヤンマー株式会社 Power transmitting device for working vehicle

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