KR102229400B1 - Drive axle for motor-driven vehicles - Google Patents

Abstract

The present invention relates to a single drive axle for a motor-driven forklift, for transmitting the power of a motor to wheels provided on both left and right sides of a drive shaft. The single drive axle comprises: a differential device (300) provided in parallel with the shaft of a motor (100); a decelerating means (200) for decelerating the power of the motor (100) and transmitting the same to the differential device (300); the differential device (300) for separating the power received from the decelerating means (200) to both sides and transmitting the same; and one wheel adapter module (400) and the other wheel adapter module (500) coupled to both sides of the differential device (300), and transmitting the power separated by the differential device (300) to externally mounted wheels. A motor driving gear (120) directly connected to a rotating shaft (110) of the motor, and a reduction gear rotation shaft (210) parallel to the rotating shaft (110) of the motor, are provided. A first reduction gear (220) of the decelerating means (200), meshing with the motor driving gear (120), and a second reduction gear (230) coaxially coupled to the first reduction gear, are provided. A differential gear (340) formed to mesh with the second reduction gear (230), the motor driving gear (120), and a power transmission housing (330) formed to embed the decelerating means (200) and the differential gear (340) therein are formed. The power transmission housing (330) is formed to be separated into one power transmission housing (310) and the other power transmission housing (320). Therefore, the safety of the forklift can be increased.

Description

Single drive axle for motor-driven vehicles {Drive axle for motor-driven vehicles}

The present invention relates to a single drive axle of an electric forklift vehicle using an electric motor.

In general, a forklift is a kind of special vehicle used to lift or transport cargo in various industrial sites, and the basic configuration of such a forklift is that a fork or carriage for lifting or unloading cargo is installed on the outside of the vehicle, An engine or motor for driving the forklift is mounted inside the vehicle body.

In addition, in industrial vehicles such as forklifts, the power transmission system in which each motor using electricity or hydraulic pressure installed one by one on the drive wheel is combined with a brake system and a planetary gear assembly can simplify the driving and control system, but the motor and the driving means and the Since the braking means are directly connected to each other, the distance between the wheels provided on the left and right sides of the driving drive shaft is widened, so that the utilization of the working space such as the turning radius and working radius of an industrial vehicle is lowered.

In addition, a reduction gear power transmission system in which a driving motor is located on one side of the housing and a driving means is located on the opposite side is provided, and components that transmit the rotational force of the motor to the externally mounted wheels are connected to one housing, and one housing. As the silver is separated into one and the other housing, the size of the housing is huge, making it difficult to process and handle the housing.

In addition, as a direct connection structure in which the power of a conventional motor is directly connected to a differential device, it is difficult to buffer a high RPM from the motor, so it is difficult to control the speed and generate noise.

Dongreuk Patent Publication No. 10-1991375 Registered Patent Publication No. 10-1287698

The present invention is to solve the above-described problem, in a differential device provided in parallel with the shaft of the motor with one motor power, it is possible to transmit power to both left and right wheels, and the motor shaft and the differential device arranged in parallel. A speed reducer that can reduce the speed of the motor can be arranged between the two, and a reduction device consisting of a planetary gear unit is arranged inside the housing of both wheel adapters, and the transaxle and brake are built into the differential window for driving. The purpose of this is to provide a single drive axle of an electric forklift vehicle that improves the safety of the forklift by reducing the distance between the wheels provided on the left and right sides of the drive shaft and lowering the center of the drive axle than before.

In addition, a motor drive gear and a differential device that separates and transmits the power transmitted from the reduction means and the reduction means to both sides is formed as one module (power transmission module), and the power separated from the power transmission module is mounted externally. Another purpose is to improve the convenience of maintenance and manufacturing by modularizing the components transmitted to the wheels to be separated.

In addition, since the power transmission module is installed biased toward one wheel adapter between one and the other wheel adapter, the lengths of one and the other drive shafts that transmit power to one and the other wheel adapters are different. A spline collar supported by a bearing is installed to separate and connect the other power shaft, which is longer than one power shaft, to form the same length and size of one and the other drive shaft. .

In addition, by processing the inside of the reduction unit housing of both wheel adapter parts, it performs the function of the ring gear of the reduction unit, and the reduction unit housing and the ring gear are integrated into a single module for convenience in repair and manufacturing. Another purpose is to provide a single drive axle of an electric forklift vehicle that improves the performance.

However, the object of the present invention is not limited to the above-mentioned object, and another object not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, a motor 100 for generating power according to the present invention, a reduction means 200 for decelerating the power, a differential device 300 receiving power from the reduction means, and the An electric forklift vehicle drive axle comprising a drive shaft disposed on both sides of a differential device to receive power from the differential device, a wheel rotated by rotation of the drive shaft, and a drive wheel on which the wheel is mounted, wherein the reduction means A power transmission module 330 formed of a single module by accommodating the 200 and the differential unit 300 and are disposed on both sides of the power transmission module.

One wheel adapter module 400 and the other wheel including the drive shaft and the drive wheel, which receive a reduction device that decelerates the rotational speed of the drive shaft and transmits it to the drive wheel, and are formed as one module (Module). Provides a single drive axle of an electric forklift vehicle, characterized in that the adapter module 500 and the one side wheel adapter module 400 and the other side wheel adapter module 500 are formed to be detachable from the power transmission module 330 I want to, but I have a purpose.

Preferably, a braking module is further provided between the power transmission module 330 and the one or the other side wheel adapter module, and the braking module stops the differential device to stop the rotation of the wheel by stopping the power shaft ( 360) is provided.

In addition, since the brake device is provided only in the brake module, the brake device is removed from the wheel adapter.

In addition, the one wheel adapter module 400 and the other wheel adapter module 500 further include wheel adapter connection bridges 430 and 530, and one end of the wheel adapter connection bridge is the power transmission module 330 Alternatively, it is connected to a braking module, and the other end is connected to a reduction device (410, 510), the reduction device (410, 510) is a sun gear (sun gear) coupled to the drive shaft, and the rotation is mounted in engagement with the sun gear. It is a planetary gear reduction device including a plurality of planetary gears and a ring gear surrounding the planetary gear, and one side reduction unit housing 411 for accommodating the planetary gear reduction device, and the reduction unit The inside of the housing is geared to perform the function of the ring gear, thereby forming a single module in which the one side reduction unit housing 411 and the ring gear are integrated.

In addition, among the one or the other wheel adapter modules, the drive transmission unit of the wheel adapter connected to the braking module is divided into a power shaft 349 and a drive shaft 348, and the divided power shaft 349 and the drive shaft 348 are separated from each other. A power shaft connection part 600 to be connected is further provided, and the length of the drive shaft 348 connected by the power shaft connection part 600 is the length of the drive shaft 346 which is the drive transmission part of the wheel adapter located on the opposite side of the braking module. Is formed in the same manner, and is formed to be located in the braking module of the power shaft.

In addition, the differential drive shaft center line of the differential unit 300 is referred to as a first center line, and a line perpendicular to the first center line at the center of the differential device is referred to as a second center line. When the left and right sides are referred to as one side and the other side, the housing of the power transmission module 330 is formed to be separated into one side and the other side power transmission housings 310 and 320.

And one wheel adapter connection bridge 430 is provided between the one side reduction unit housing 411 and the one side power transmission housing 310, and one side surface 431 of the one side wheel adapter connection bridge 430 ) Has a first coupling portion 432 coupled to the other side of the one side reduction unit housing 411, and one side power transmission housing in the outer diameter portion near the other side 433 of the one side wheel adapter connection bridge 430 A second coupling portion 434 coupled to the 310 is formed.

In addition, the one side wheel adapter 420 is provided with an adapter housing 421 surrounding the one side wheel adapter 420, coupled to one side of the one side reduction unit housing 411 on the other side of the adapter housing, An edge portion having a predetermined width is provided at a coupling portion between the adapter housing 421 and the one side wheel adapter connection bridge 430.

In addition, as a through hole formed to penetrate through a predetermined portion of the edge portion of the one side reduction unit housing 411 is formed, a bolt is inserted from the through hole of the one side wheel adapter 420 of the one side wheel adapter connection bridge 430. It is formed to be coupled to the rim by tightening bolts.

In addition, the outer diameter portion 436 formed in the vicinity of the other side 433 of the wheel adapter connection bridge 430 is provided with a stepped 433 formed at a position distant from the other side 433, and the one side In the power transmission housing 310, an assembly hole 311 into which the outer diameter portion is inserted is formed, and the outer diameter portion 436 on which the stepped portion 435 of the one side wheel adapter connection bridge 430 is formed is formed into the assembly hole 311. ) To fit.

In addition, the inner side of the outer diameter portion 436 of the wheel adapter connection bridge (bridge) 430, the bearing insertion inner diameter portion 437 into which the bearing 450 for supporting the rotational shaft of the differential device's crown wheel 341 is inserted. Is provided, and the assembly hole 311 has a predetermined width in the direction of the first center line, and a seating portion 312 formed at a right angle to the assembly hole 311 is provided inside the assembly hole.

And the seating part 312 includes a coupling ring 350 for coupling the one side wheel adapter connection bridge 430 and the one side power transmission housing 310, and a part of the coupling ring 350 An overlapping portion formed to overlap the other side surface 433 of one wheel adapter connection bridge is provided, and a screw hole is formed in the other side surface 433 of the connection bridge, and a through hole formed in the overlapping portion of the coupling ring 350 is provided. As it is, it is screwed through the through hole.

In addition, a brake device 360 coupled to the one side power transmission housing 320 and the brake device 360 includes a main brake 380 that stops rotation of the differential gear case 347.

In addition, an outer case 361 surrounding the brake device 360 is provided, and the other side of the one side power transmission housing 320 is coupled to one side 362 of the outer case 361,

One side of the outer case 361 is coupled to a wheel adapter module 500 on the other side 363 of the outer case 361 and is coupled to the other side of the one side power transmission housing 320 A coupling portion 364 formed in the vicinity of 362, and a coupling flange 365 formed at a position distant from the one side by a predetermined distance are provided on the outer diameter surface of the coupling portion 364,

A through hole is formed in the coupling flange 365, and a coupling hole 321 into which the coupling part 362 is fitted is formed in the one side power transmission housing 320, so that the one side power transmission housing 320 is coupled. The coupling part 362 formed in the housing 361 of the brake part 360 is fitted into the hole 321, and the one side power transmission housing 320 is fitted with a fastening bolt through a through hole formed in the coupling flange 363. It is connected by fastening it to the other side of the.

In addition, the other side of the outer case 361 is coupled to one wheel adapter module 500, and the one wheel adapter module 500 includes a wheel adapter 520 on which a wheel is mounted to the outside, and the drive shaft 346 on the one side. ) One side deceleration unit 510 that decelerates the power transmitted from and transmits it to the one side wheel adapter 520, and one side wheel adapter connection bridge formed to connect the one side deceleration unit 510 and the differential brake unit 360 (bridge; 530).

In addition, a coupling flange 533 protruding toward the outer diameter at a position distant from the one side 531 is provided in the coupling portion 532 formed near the one side 531 of the one side wheel adapter connection bridge 530. .

In addition, a through hole is formed in the coupling flange 533, and an assembly hole 366 into which the coupling portion 532 is fitted is formed on the other side of the outer case 361, and A helical hole 367 is formed on the side, and a coupling portion 532 having a coupling flange 533 of the wheel adapter connection bridge 530 is fitted into the assembly hole 366, and the coupling flange Through a through hole formed in 533, a fastening bolt is coupled to the spiral hole 367 formed on the other side near the assembly hole 366 of the one side power transmission housing 320.

In addition, a power shaft connection part 600 connecting the power shaft 349 and the drive shaft 348 is provided on the inner side of the coupling jaw 532 formed on the one side 531 of the wheel adapter connection bridge 530, The power shaft connection part 600 is provided with a spline collar 601 provided with a bearing for connecting and supporting the power shaft 349 coupled to the differential gear unit.

In addition, the bearing insertion inner diameter portion 534 of the wheel adapter connection bridge 530 on which the spline collar 601 is installed is of the drive shaft connected to the both wheel adapter connection bridges 430 and 530. The length of the outer case 361 is adjusted so that the bearing inserting inner diameter portion 534 can be located at a point where the length is the same.

In addition, the one and the other side wheel adapter module (400, 500) is disassembled from the wheel adapter connection bridge (430, 530) to the wheel adapter (420, 520) and the reduction unit (410, 510) using a plurality of fastening bolts. It is formed to enable assembly.

Features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to this, terms or words used in the present specification and claims should not be interpreted in a conventional and dictionary meaning, and the inventor may appropriately define the concept of terms in order to describe his own invention in the best way. It should be interpreted as a meaning and concept consistent with the technical idea of the present invention based on the principle that there is.

As described above, according to the present invention, according to the present invention, the speed of the motor transmitted to the differential device is reduced by the reduction means, the arrangement of the reduction device consisting of planetary gear units inside the housing of both wheel adapters, and the transformer inside the differential window. By forming the axle and brake to be built-in, the gap between the wheels provided on the left and right sides of the driving shaft can be narrowed, and by lowering the center of the drive axle than before, there is an effect of reducing the noise of the forklift and improving safety.

In addition, a motor drive gear and a differential device that separates and transmits the power transmitted from the reduction means and the reduction means to both sides is formed as a single power transmission module, and the power separated from the power transmission module is transferred to the externally mounted wheel. It has the effect of improving the convenience of maintenance and manufacturing by modularizing the left and other side wheel adapters to be delivered.

In addition, since the power transmission module is installed biased toward one of the wheel adapters between the two wheel adapters, the lengths of the drive shafts on both sides that transmit power to both wheel adapters are different. A spline collar supported by a bearing is installed at a position corresponding to the shorter length of the drive shafts on both sides, so that different drive shafts can be separated and connected, so that the lengths and specifications of the drive shafts on both sides are equally common.

In addition, by processing the inside of the reduction unit housing of both wheel adapter parts in the prior art to perform the function of the ring gear of the reduction unit, the reduction unit housing and the ring gear are integrated into a single module, making it convenient for repair and manufacturing. There is an effect that can improve sex.

1 is a schematic view of a single drive axle according to the prior art.
Figure 2 is a cross-sectional view of a single drive axle according to an embodiment of the present invention.
3 is an enlarged view of an enlarged portion "A" of FIG. 2;
Figure 4 is an enlarged enlarged view of the wheel adapter connection bridge of Figure 2 of the present invention.
5 is an enlarged view of an enlarged portion "B" of FIG. 2.
6 is an enlarged view of an enlarged portion "C" of FIG. 2.
Figure 7 is an enlarged enlarged view of the other wheel adapter connection bridge of Figure 2 of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of description.

In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of users or operators. Therefore, definitions of these terms should be made based on the contents throughout the present specification.

In addition, the following examples are not intended to limit the scope of the present invention, but are merely exemplary matters of the elements presented in the claims of the present invention, and are included in the technical idea throughout the specification of the present invention and the composition of the claims. Embodiments including elements that can be substituted as equivalents in elements may be included in the scope of the present invention.

Attached Figure 1 is a schematic diagram of a single drive axle according to the prior art, Figure 2 is a cross-sectional view of a single drive axle according to an embodiment of the present invention, Figure 3 is an enlarged view of the "A" part of Figure 2, Figure 4 is an enlarged view of one side wheel adapter connection bridge of FIG. 2 of the present invention, FIG. 5 is an enlarged view of part "B" of FIG. 2, and FIG. 6 is an enlarged view of part "C" of FIG. 2; Figure 7 is an enlarged view of the other wheel adapter connection bridge of Figure 2 of the present invention.

In order to better understand the development environment of the single drive axle of an electric forklift vehicle using the electric motor of the present invention, a single drive axle according to the prior art is shown in FIG. 1.

Referring to FIG. 1, the motor brake 15 is mounted for braking of the motor shaft connected to the motor, and the left-drive shaft is connected to the motor shaft and gears to receive the driving force of the motor and transmit the driving force to the wheel. A single drive axle having a separate differential device 12 and a left and right drive section into which a drive shaft for transmitting the drive force separated from the differential device is inserted, and a drive shaft brake 16 and 17 for applying the braking force of the drive shaft is shown.

As shown in FIG. 1, it can be seen that the components that transmit the rotational force of the motor to the externally mounted wheels are provided inside the two housings.

As described above, as the two housings are provided with both a differential device and a drive system for transmitting to the wheel, it is difficult to process and handle the housing.

In addition, there is a problem in narrowing the gap between the wheels by attaching a brake system to each of the drive shafts on which both wheels are mounted.

The present invention for solving the problems of the prior art and the above technical problems as described above relates to a single drive axle of an electric forklift vehicle using an electric motor.

The motor 100 for generating power according to the present invention, a deceleration means 200 for decelerating the power, and a differential device 300 receiving power from the deceleration means, are disposed on both sides of the differential device. In an electric forklift vehicle drive axle having a drive shaft receiving power from a differential unit, a wheel rotated by rotation of the drive shaft, and a drive wheel on which the wheel is mounted, the reduction means 200 and the differential unit The power transmission module 330 formed of a single module by accommodating 300 and is disposed on both sides of the power transmission module.

One wheel adapter module 400 and the other wheel including the drive shaft and the drive wheel, which receive a reduction device that decelerates the rotational speed of the drive shaft and transmits it to the drive wheel, and are formed as one module (Module). Provides a single drive axle of an electric forklift vehicle, characterized in that the adapter module 500 and the one side wheel adapter module 400 and the other side wheel adapter module 500 are formed to be detachable from the power transmission module 330 I want to, but I have a purpose.

Preferably, a braking module is further provided between the power transmission module 330 and the one or the other side wheel adapter module, and the braking module stops the differential device to stop the rotation of the wheel by stopping the power shaft ( 360) is provided.

In addition, since the brake device is provided only in the brake module, the brake device is removed from the wheel adapter.

In addition, the one wheel adapter module 400 and the other wheel adapter module 500 further include wheel adapter connection bridges 430 and 530, and one end of the wheel adapter connection bridge is the power transmission module 330 Alternatively, it is connected to a braking module, and the other end is connected to a reduction device (410, 510), the reduction device (410, 510) is a sun gear (sun gear) coupled to the drive shaft, and the rotation is mounted in engagement with the sun gear. It is a planetary gear reduction device including a plurality of planetary gears and a ring gear surrounding the planetary gear, and one side reduction unit housing 411 for accommodating the planetary gear reduction device, and the reduction The inside of the unit housing is geared to perform the function of the ring gear, thereby forming a single module in which the one side reduction unit housing 411 and the ring gear are integrated.

In addition, among the one or the other wheel adapter modules, the drive transmission unit of the wheel adapter connected to the braking module is divided into a power shaft 349 and a drive shaft 348, and the divided power shaft 349 and the drive shaft 348 are separated from each other. A power shaft connection part 600 to be connected is further provided, and the length of the drive shaft 348 connected by the power shaft connection part 600 is the length of the drive shaft 346 which is the drive transmission part of the wheel adapter located on the opposite side of the braking module. Is formed in the same manner, and is formed to be located in the braking module of the power shaft.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

As shown in Figure 2, the single drive axle of the electric forklift vehicle of the present invention is a differential provided in parallel with the axis of the motor 100 in order to transmit the power of the motor to the wheels provided on the left and right sides of the driving shaft for driving. The device unit 300, a deceleration means 200 for decelerating the power of the motor 100 and transmitting it to the differential unit 300, and the power transmitted from the deceleration means 200 are separated into both sides and transmitted. The differential unit 300 is coupled to both sides of the differential unit 300, and one and the other side wheel adapter modules for transmitting the power separated from the differential unit 300 to an externally mounted wheel (Wheel It can be seen that it is a single drive axle of an electric forklift consisting of an adapter module; 400, 500).

In the single drive axle of the electric forklift as described above, the differential drive shaft center line of the differential device unit 300 is referred to as a first center line, and a line perpendicular to the first center line at the center of the differential device is a second When the second center line is referred to as the center line, one side and the other side are referred to, and in one configuration, one side is referred to as one side and the other side is referred to as the other side,

A reduction means having a motor drive gear 120 directly connected to the rotation shaft 110 of the motor, a reduction gear rotation shaft 210 parallel to the rotation shaft 110 of the motor, and meshing with the motor driving gear 120 It is provided with a first reduction gear 220 of 200, and a second reduction gear 230 coupled to the same axis as the first reduction gear,

It may be made of a differential gear unit 340 formed to mesh with the second reduction gear 230.

In addition, the motor drive gear 120, a power transmission housing 330 formed such that the reduction means 200 and the differential gear unit 340 are built-in, and the power transmission housing 330 is a power transmission housing on one side and the other side It is formed to be separated into (310, 320).

In addition, the differential gear unit 340 includes a crown wheel 341 of a differential device engaged with the second reduction gear 230 of the reduction means 200, and the ring gear 341. Differential gears (342, 343) for separating and transmitting the power of the two sides and the left and the other side differential large gears (344, 345) are formed, so that the rotational force of the motor passes through the reduction means 200 and the differential gear unit 340 ) Is transmitted to the drive shaft on both sides through differential large gears (344, 345) on the left and the other side.

Referring to FIGS. 3, 4, and 5, the one wheel adapter module 400 and the other wheel adapter module 500 further include wheel adapter connection bridges 430 and 530 as shown in the drawings. The wheel adapter module 400 on one side is coupled to the power transmission housing 310 on the one side, while the wheel adapter module on the other side 500 is connected to a brake module, that is, a brake device 360, and the brake device 360 It is coupled to the other side of the power transmission housing 320 on one side of the.

In addition, the power separated from the differential gear unit 340 is to one side of the wheel adapter module 400 to one side of the drive shaft 346 to the one side reduction device 410 of the one side of the wheel adapter module 400, the sun gear (sun gear). On the other hand, the power transmitted to the wheel adapter module 500 on the other side is the other side by the power shaft 349 connected to the braking module, that is, the brake device 360 and the drive shaft 348 on the other side connected to the power shaft 349. It is connected to the sun gear of the other reduction device 510 provided in the wheel adapter module 500.

In addition, looking at the configuration in which the power separated from the power transmission housing 330 is transmitted to the wheel adapter 420 on which the wheel is mounted outside,

The left wheel adapter module 400 includes a wheel adapter 420 on which a wheel is externally mounted, and a reduction unit for reducing the power transmitted from the driving shaft 346 and transmitting it to the wheel adapter 420 ( 410).

The one side reduction unit 410 includes a sun gear coupled to a drive shaft, a plurality of planet gears that rotate while being engaged with the sun gear, and a ring gear surrounding the planetary gear. It is a planetary gear reduction device comprising a, and the one side reduction unit housing 411 internally is processed to perform the function of the ring gear (Ring gear) to perform the function of the one side reduction unit housing 411 and the ring gear to be a single unit Make it modular.

And one wheel adapter connection bridge 430 is provided between the one side reduction unit housing 411 and the one side power transmission housing 310, and one side surface 431 of the one side wheel adapter connection bridge 430 ) Has a first coupling portion 432 coupled with the other side of one side of the reduction unit housing 411, and a reduction means 200 in the outer diameter portion near the other side 433 of the one side wheel adapter connection bridge 430. ) And a second coupling portion 434 coupled to one side power transmission housing 310 in which the differential gear portion 340 is embedded is formed.

In addition, one side wheel adapter 420 is provided with an adapter housing 421 surrounding the one side wheel adapter 420, coupled to one side of the one side reduction unit housing 411 on the other side of the adapter housing 421 In addition, an edge portion having a predetermined width is provided at a coupling portion between the adapter housing 421 and the one side wheel adapter connection bridge 430.

In addition, as a through hole formed to penetrate through a predetermined portion of the rim portion of the one side reduction unit housing 411 is formed, a bolt is inserted from the through hole of the one side wheel adapter 420 to connect the wheel adapter 430 It is formed to be coupled by tightening bolts on the rim of the.

In addition, the outer diameter of the rim portion having a predetermined width and the outer diameter of the one side reduction unit housing 411 may be selected equally to the coupling portion between the adapter housing 421 and the one side wheel adapter connection bridge 430.

According to the above configuration, the left wheel adapter module 400 is formed so that the wheel adapter 420 and the reduction unit 410 can be disassembled and assembled at the wheel adapter connection bridge 430 using a plurality of fastening bolts. As can be seen, the reduction unit 410 is modularized in which a plurality of planet gears are built in and a ring gear surrounding the planetary gear is integrated with the reduction unit housing 411 on one side, Processing of the ring gear assembly for accommodating the ring gear in the housing, and the process of accommodating and fixing the ring gear to the ring gear assembly may be omitted.

In addition, the reduction unit 410 including the planetary gear in the left wheel adapter module 400 may have a high reduction ratio.

In addition, during maintenance such as damage to the planetary gear, the integrated reduction unit 410 module can be replaced conveniently and quickly.

In addition, the outer diameter portion 436 formed in the vicinity of the other side 433 of the wheel adapter connection bridge 430 is provided with a stepped 433 formed at a position distant from the other side 433, and the An assembly hole 311 into which the outer diameter part is inserted is formed in one power transmission housing 310, and an outer diameter part 436 on which a stepped 435 of the wheel adapter connection bridge 430 is formed is formed in the assembly hole ( 311).

In addition, the inner side of the outer diameter portion 436 of the wheel adapter connection bridge (bridge) 430, the bearing insertion inner diameter portion 437 into which the bearing 450 for supporting the rotational shaft of the differential device's crown wheel 341 is inserted. Is provided, and the assembly hole 311 has a predetermined width in the direction of the first center line, and a seating portion 312 formed at a right angle to the assembly hole 311 is provided inside the assembly hole.

In addition, the seating portion 312 includes a coupling ring 350 for coupling the one side wheel adapter connection bridge 430 and the one side power transmission housing 310, and a portion of the coupling ring 350 is provided with the An overlapping portion formed to overlap the other side surface 433 of one wheel adapter connection bridge is provided, and a screw hole is formed in the other side surface 433 of the connection bridge, and a through hole formed in the overlapping portion of the coupling ring 350 is provided. As it is, it is screwed through the through hole.

That is, a bearing insertion inner diameter portion 437 is provided on the inner side of the outer diameter portion 436 in which the stepped 435 of the wheel adapter connection bridge 430 is formed as described above,

An assembly hole 311 is formed in the power transmission housing 310 on one side, and the assembly hole 311 has a predetermined width in the direction of the first center line, and a seat formed at a right angle to the assembly hole 311 inside the assembly hole It can be seen that the unit 312 is provided,

After the outer diameter portion 436 having the stepped step 435 of the one side wheel adapter connection bridge 430 is fitted into the assembly hole 311 formed in the one side power transmission housing 310, the inner side of the outer diameter portion 436 Inserting a bearing 450 for supporting a rotating shaft of a crown wheel 341 of the differential device into the bearing insertion inner diameter 437 formed in,

A coupling ring 350 is provided in the seating portion 312 of the one side power transmission housing 310 to which the outer diameter portion 436 on which the stepped jaw 435 is formed is fitted, and through a through hole formed in the coupling ring 350 It is fastened with the wheel adapter connection bridge 430 on one side with a fastening bolt.

By such fastening, the outer diameter portion 436 on which the stepped jaw 435 is formed and the assembly hole 311 formed in the one side power transmission housing 310 are fitted, and the coupling ring 350 is connected to one side wheel adapter connection bridge with a fastening bolt. Since it is fastened to 430, the mounting portion 312 of one side of the power transmission housing 310 is pressed and fixed.

In addition, positioning protrusions and grooves, or position indicators are added to the outer diameter portion 436 on which the stepped portions 435 are formed and the assembly hole 311 formed in the one side power transmission housing 310 to set the assembly position of the fitting components. You may.

Looking at with reference to Figures 5 and 6,

The other side power transmission housing 320 is fastened to the other side of the one side power transmission housing 310.

Inside the one power transmission housing 310 and the other power transmission housing 320, a motor drive gear 120 directly connected to the shaft of the motor 100, and a reduction gear rotation shaft parallel to the rotation shaft 110 of the motor ( 210), the first reduction gear 220 of the reduction means 200 meshing with the motor driving gear 120, the second reduction gear 230 coupled to the same axis as the first reduction gear , A differential small gear 342 for separating and transmitting power of a differential device formed to engage with the second reduction gear 230 and a crown wheel 341 of the differential device, and the power of the ring gear 341, It can be seen that a differential gear unit 340 comprising 343) and large differential gears 344 and 345 on the left and the other side are built-in.

In this way, a speed reducer capable of reducing the speed of the motor between the motor shaft and the differential device can transmit power to the left and right wheels in the differential device provided in parallel with the shaft of the motor as the motor power. By placing it, it is easy to adjust the speed, reduce noise, and improve the safety of the forklift by lowering the center of the drive axle than before.

In addition, a brake device 360 is coupled to the other side of the power transmission housing 320 on the other side, and the brake device 360 is a main restraining the differential gear case 347 coupled to the large differential gear 345 on the other side. The brake 380 is installed inside, and has an outer case 361 of the brake device that protects it from external hazards.

Looking at the shape of the outer case 361,

The inside of the outer case 361 is processed into a multi-stage cylinder so that the piston of the hydraulic cylinder 370 is seated and moved in a cylindrical portion with the smallest diameter, the piston seating portion 371, the plates and the main disk ( A plate mounting portion 368 on which the 382 is installed, and a plate support mounting portion 369 to which the plate support 386 is coupled and fixed are sequentially formed.

A piston 373 is mounted on the piston mounting portion 371, and the piston 373 advances toward the plate mounting portion 368 by a fluid supplied from the outside, and the advanced piston; A piston return device 376 for moving 373 to an initial position is provided.

A main disk 382 and a plate 397 are disposed on the plate mounting portion 368.

A plate support 386 is installed in the plate support installation part 369,

A rotating bearing for supporting the differential gear case 347 is provided on an inner diameter of one side of the plate support 386, and a support 387 for supporting the plate support 386 is provided on the other side, and the other side A fastening hole 389 into which a support rod is inserted so that the plate 397 can be fixed to the outer case 361 is formed in the flange 388 formed toward the outer diameter by taking a certain distance at.

In addition, by forming a support rod having a helical part at the end thereof through a fastening hole 389 of the flange 388 and an assembly hole 398 formed in a plurality of plates so that the helical part is fastened to the outer case 361, a plurality of plates ( 397 is fixed to the outer case 361.

In addition, as the main brake hub 381 and the sub brake hub 391 are stopped, rotation of the differential gear case 347 and the power shaft 349 is stopped.

Looking at with reference to FIGS. 6 and 7,

It can be seen that the other side of the housing 361 of the differential brake unit 360 is coupled to the other wheel adapter module 500, and the other wheel adapter module 500 is The other side wheel adapter 520, the other side deceleration unit 510 that decelerates the power transmitted from the other side drive shaft 348 and transmits it to the other side wheel adapter 520, the other side deceleration unit 510 and the differential brake unit It consists of a wheel adapter connection bridge (530) formed to connect the other side (360).

In addition, a coupling flange 533 protruding toward the outer diameter at a position distant from the one side 531 at a predetermined distance from the coupling portion 532 formed near one side 531 of the other wheel adapter connection bridge 530 is provided. A through hole is formed in the coupling flange 533, and an assembly hole 366 in which the coupling portion 532 is fitted is formed on the other side of the housing 361 of the differential brake unit 360, A spiral hole 367 is formed on the other side near the assembly hole 366.

In addition, the coupling portion 532 in which the coupling flange 533 of the other wheel adapter connection bridge 530 is formed is fitted into the assembly hole 366, and through a through hole formed in the coupling flange 533 The other side power transmission housing 320 is fastened to and coupled to the spiral hole 367 formed on the other side near the assembly hole 366 of the other side power transmission housing 320 with a fastening bolt.

As shown above, the power transmission module provided in the power transmission housing with the motor is installed lean toward one wheel adapter between the left and right wheel adapters, and the length of one and the other side drive shafts that transmit power to the left and right wheel adapters. The other drive shaft is formed relatively longer than that of one drive shaft.

In this way, since the lengths of one side and the other side drive shaft are different, there is a problem of manufacturing and storing each power shaft for power transmission, and thus common use is required.

In order to solve such a problem, a power shaft connection part connecting the power shaft 349 and the drive shaft 348 to the inner side of the coupling jaw 532 formed on one side 531 of the other wheel adapter connection bridge 530 600 is provided, and the power shaft connection part 600 installs a spline collar 601 provided with a bearing that connects and supports the power shaft 349 coupled to the differential gear unit.

The spline collar supported by the bearing is installed at positions corresponding to different lengths of both drive shafts, and the other drive shaft, which is longer than one power shaft, is coupled to the other differential large gear and the power shaft 349 and the other side Separated by the other side drive shaft 348 connected to the wheel adapter module 500, the spline collar is connected to one side of the power shaft 349, and the other side is connected to the other side wheel adapter module 500. The other drive shaft 348 may be connected so that the lengths and specifications of one and the other drive shafts may be the same.

The bearing insertion inner diameter portion 534 of the other side wheel adapter connection bridge 530 on which the spline collar 601 is installed is the length of the other side drive shaft 348 of the one side drive shaft 346. The length of the housing 361 is adjusted so that the bearing inserting inner diameter portion 534 in which the spline collar 600 is installed can be located at the same point as the length.

In this way, a motor drive gear 120 directly connected to the shaft of the motor 100, a reduction gear rotation shaft 210 parallel to the rotation shaft 110 of the motor, and a reduction gear engaged with the motor driving gear 120 The first reduction gear 220 of the means 200, the second reduction gear 230 coupled to the same axis as the first reduction gear, and a ring of the differential device formed to mesh with the second reduction gear 230 A differential consisting of a gear (crown wheel) 341 and a differential to transmit the power of the ring gear (crown wheel) 341 by separating it into both sides Centering on the power transmission housing in which the device gear unit 340 is embedded, one wheel adapter module 400 is on one side, and the differential brake unit 360 and the other wheel adapter module 500 are on the other side. ) Is formed into a block and combined, it is possible to separate and process it into a separate housing compared to the conventional one-piece housing, and it is lightweight, and due to this blockage, it can be partially replaced during maintenance of the housing or internal parts. It works.

In addition, one and the other side wheel adapter module (400, 500) can be separated into one side and the other side wheel adapter (420, 520) and the one side and the other side reduction units (410, 510) to which the wheel is mounted outside, and during maintenance There is an effect possible by replacing these modules or simply repairing them.

In addition, it is easy to assemble and disassemble through a single module that integrates the reduction unit housing and the ring gear by performing the function of the ring gear of the reduction unit by gradually processing the inside of the reduction unit housing of both wheel adapters. There is a convenient effect of maintenance and management.

Although the present invention has been described in detail through specific examples, this is for describing the present invention in detail, and the present invention is not limited thereto, and within the technical idea of the present invention, by those of ordinary skill in the art. It is clear that modifications or improvements are possible.

All simple modifications to changes of the present invention belong to the scope of the present invention, and the specific scope of protection of the present invention will be made clear by the appended claims.

100: motor unit 110: rotation shaft of the motor
120: motor drive gear 200: deceleration means
210: reduction gear rotation shaft 220: first reduction gear
230: second reduction gear 300: differential device unit
310: one side power transmission housing 311: assembly hole
312: seat 320: the other side power transmission housing
321: coupling hole 330: power transmission housing
340: differential gear unit 341: ring gear of the differential device
342: differential small gear 345: the other side differential large gear
347: differential gear case 349: power shaft
350: coupling ring 360: brake device
400: wheel adapter module on one side 410: reduction unit on one side
420: one side wheel adapter 430: one side wheel adapter connection bridge
431: one side 432: first coupling portion
433: other side 434: second coupling portion
450: bearing 500: other side wheel adapter module
510: other side reduction unit 520: other side wheel adapter
530: other wheel adapter connection bridge 600: power shaft connection (600)

Claims (12)

A motor 100 for generating power, a deceleration means 200 for decelerating the power, a differential unit 300 receiving power from the deceleration means, and a differential unit 300 disposed on both sides of the differential unit and An electric forklift vehicle drive axle having a drive shaft receiving power, a wheel rotated by rotation of the drive shaft, and a drive wheel on which the wheel is mounted,
A power transmission module 330 formed as a single module by accommodating the reduction means 200 and the differential device 300,
Are disposed on both sides of the power transmission module
One wheel adapter module 400 and the other wheel including the drive shaft and the drive wheel, which receive a reduction device that decelerates the rotational speed of the drive shaft and transmits it to the drive wheel, and are formed as one module (Module). Adapter module 500,
The one side wheel adapter module 400 and the other side wheel adapter module 500 are formed to be detachable from the power transmission module 330,
A braking module is further provided between the power transmission module 330 and the one or the other side wheel adapter module,
The drive transmission part of the wheel adapter connected to the brake module in the other wheel adapter module 500 is divided into a power shaft 349 and a drive shaft 348,
A power shaft connection part 600 connecting the divided power shaft 349 and the drive shaft 348 is further provided,
The other wheel adapter module 500 is provided with a reduction device 510 for decelerating the rotational speed of one drive shaft 348 connected by the power shaft connection part 600 and transmitting it to the drive wheel.
The one wheel adapter module 400 is provided with a reduction device 410 for reducing the rotational speed of another driving shaft 346, which is a driving transmission unit of the wheel adapter, and transmitting it to the driving wheel.
The reduction devices 410 and 510 include a sun gear,
A plurality of planetary gears that rotate while being engaged with the sun gear,
It is a planetary gear reduction device including a ring gear surrounding the planetary gear,
The sun gear of the reduction device 510 provided in the other wheel adapter module 500 is coupled with one drive shaft 348 connected by the power shaft connection part 600,
A single drive axle of an electric forklift vehicle, characterized in that the sun gear of the reduction device 410 provided in the wheel adapter module 400 is coupled to another drive shaft 346 that is a drive transmission unit of the wheel adapter .
delete delete delete The method of claim 1,
The length of the drive shaft 348 connected by the power shaft connection part 600 is
A single drive axle of an electric forklift vehicle, characterized in that the length of the drive shaft (346) is the same as that of the drive shaft (346) that is the drive transmission unit of the wheel adapter located on the opposite side of the braking module, and is located in the braking module of the power shaft. The method of claim 1,
A single drive axle of an electric forklift vehicle, characterized in that the braking module is provided with a brake device (360) for stopping the rotation of the wheel by stopping the differential device. The method of claim 6,
The single drive axle of an electric forklift vehicle, characterized in that the brake device is provided only in the braking module and thus the brake device is removed from the wheel adapter. The method of claim 1,
The differential drive shaft center line of the differential unit 300 is referred to as a first center line, and a line perpendicular to the first center line at the center of the differential device is referred to as a second center line. When and the right side are referred to as one side and the other side,
A single drive axle of an electric forklift vehicle, characterized in that the housing of the power transmission module 330 is formed to be separated into one and the other power transmission housings 310 and 320. The method of claim 8,
One wheel adapter connection bridge 430 is provided between the one side reduction unit housing 411 and the one side power transmission housing 310,
A first coupling portion 432 coupled to the other side of the one side reduction unit housing 411 on one side 431 of the one side wheel adapter connection bridge 430,
A second coupling portion 434 coupled to one power transmission housing 310 is formed at an outer diameter portion near the other side 433 of the wheel adapter connection bridge 430. Single drive axle. The method of claim 9,
The one side wheel adapter 420 is provided with an adapter housing 421 surrounding the one side wheel adapter 420,
It is coupled to one side of the one side reduction unit housing 411 on the other side of the adapter housing,
An rim portion having a predetermined width is provided at a coupling portion between the adapter housing 421 and the wheel adapter connection bridge 430,
As a through hole formed to penetrate through a predetermined portion of the edge portion of the one side reduction unit housing 411 is formed,
A single drive axle of an electric forklift vehicle, characterized in that the bolt is inserted from the through hole of the wheel adapter 420 and is coupled to the rim of the wheel adapter connection bridge 430 by tightening the bolt. The method of claim 10,
The outer diameter portion 436 formed in the vicinity of the other side 433 of the wheel adapter connection bridge 430 is provided with a stepped 433 formed at a location distant from the other side 433,
An assembly hole 311 into which the outer diameter part is inserted is formed in the one side power transmission housing 310,
A single drive axle of an electric forklift vehicle, characterized in that the outer diameter portion (436) in which the stepped step (435) of the one side wheel adapter connection bridge (430) is formed is fitted into the assembly hole (311). The method of claim 11,
The inner side of the outer diameter portion 436 of the wheel adapter connection bridge 430 is provided with a bearing insertion inner diameter portion 437 into which a bearing 450 supporting a rotation shaft of a crown wheel 341 of the differential device is inserted. Become
The assembly hole 311 has a predetermined width in the direction of the first center line, and a seating portion 312 formed at a right angle to the assembly hole 311 is provided inside the assembly hole,
The seating portion 312 includes a coupling ring 350 for coupling the one side wheel adapter connection bridge 430 and the one side power transmission housing 310,
A portion of the coupling ring 350 is provided with an overlapping portion formed to overlap the other side 433 of the one side wheel adapter connection bridge.
A single drive of an electric forklift vehicle, characterized in that a screw hole is formed in the other side surface 433 of the connecting bridge, and a through hole formed in the overlapping portion of the coupling ring 350 is provided and is screwed through the through hole. Axle.

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