KR20200048013A - Power transfer apparatus for multi-purpose agriculture electronic vehicle - Google Patents

Abstract

The present invention relates to a power transmission apparatus for a multi-functional agricultural electromotive vehicle and, more specifically, to a power transmission apparatus for a multi-functional agricultural electromotive vehicle, which is configured to connect a trajectory sprocket and a driving electromotive shaft, in a spline structure, for rotating along a vehicle body driving trajectory of a harvester, and to support a sprocket at a tapered roller bearing mounted in a bearing block, thereby having a structure being easy to assemble, disassemble and maintain. The power transmission apparatus for a multi-functional agricultural electromotive vehicle according to the present invention, in which the multi-functional agricultural electromotive vehicle for allowing a caterpillar track to receive a rotational force of a driving motor to drive the vehicle body is provided to transmit power of the driving motor to the caterpillar track, comprises: driving sprockets rotatably mounted in trajectory support frames provided at both sides of the vehicle body to be engaged with chains of the caterpillar tracks, respectively; and universal joints each of which is positioned between the driving motor and the driving sprocket to connect one end thereof to a rotary shaft of the driving motor and connect the other end to the driving sprocket, wherein a spline boss is formed at each of the other ends of the driving sprockets and the universal joints, and the other ends of the driving sprockets and the universal joints are connected to each other by inserting a spline shaft into the spline bosses.

Description

Power transmission device for multi-functional agricultural electric vehicle {POWER TRANSFER APPARATUS FOR MULTI-PURPOSE AGRICULTURE ELECTRONIC VEHICLE}

The present invention relates to a power transmission device for a multi-functional agricultural electric vehicle, and more particularly, a sprocket to a tapered roller bearing connected to a spline structure and an orbital sprocket and a driving electric shaft for rotating the orbit for driving the body of the harvester. It relates to a power transmission device for a multi-functional agricultural electric vehicle having a structure that is easy to assemble, disassemble and maintain so as to be supported.

In general, electric vehicles are actively being developed as a new means of transportation that effectively utilizes surplus power in connection with energy conservation as well as solving pollution problems such as noise and exhaust gases of automobiles. Recently, Korean Patent Registration No. 10-1324012 (Agricultural electric vehicles, 2013.10.25) or Republic of Korea Patent Publication No. 10-2014-0136072 (agricultural electric vehicles, 2014.11.28), such as electric vehicles or electric tractors are being developed for agriculture.

However, in the case of a conventional agricultural electric vehicle, the development of an electric vehicle for farming and harvesting is still insufficient due to the development and development of transportation and loading.

On the other hand, conventional agricultural machinery is classified into a wheel type using a wheel and a crawler type using a caterpillar according to the driving device, and the crawler type running in the caterpillar type is suitable for the above-described multi-functional agricultural vehicle due to the geographical characteristics of Korea.

Accordingly, in recent years, the necessity of a multifunctional agricultural machine electric power vehicle that can easily access the inclined terrain and can function as a control, lift, and harvester as well as a transport function has emerged, and the applicant of the present invention is registered in the Republic of Korea Patent No. 10-1736355 No. (Multi-Functional Agricultural Electric Vehicle Platform, 2017.05.10) has developed electric agricultural vehicles and harvesters that can be used for various purposes.

However, in the case of an agricultural electric vehicle, as the vehicle travels through the rough terrain, the torsion and lateral impact of the vehicle body are repeatedly applied, resulting in frequent damage or breakdown as impact is applied to the power transmission device from the drive motor to the caterpillar, including the electric shaft. It has a problem that occurs.

In addition, in a crawler type agricultural electric vehicle using a caterpillar, the structure of the power transmission device connecting the caterpillar and the drive motor is complicated, and assembly and disassembly are difficult, and thus there are many difficulties in maintenance.

Republic of Korea Registered Patent No. 10-1324012 (2013.10.25): electric vehicle for agriculture Republic of Korea Patent Publication No. 10-2014-0136072 (2014.11.28): electric vehicle for agriculture Republic of Korea Registered Patent No. 10-1736355 (2017.05.10): multi-function agricultural electric vehicle body platform

The present invention was devised by recognizing the above points, and an object of the present invention is to connect a track sprocket and a drive electric shaft for rotating a track for driving a body of a harvester in a spline structure and to a tapered roller bearing mounted on a bearing block. It is intended to provide a power transmission device for a multi-functional agricultural electric vehicle having a structure that is easy to assemble, disassemble, and maintain because a sprocket is supported.

In order to achieve the above object, the power transmission device for a multi-functional agricultural electric vehicle according to the present invention is configured to transmit power of a driving motor to a caterpillar in a multi-functional agricultural electric vehicle in which a caterpillar drives a vehicle body by receiving the rotational force of a driving motor. A power transmission device for a multi-functional agricultural electric vehicle, comprising: a drive sprocket rotatably mounted on a track support frame provided on each side of the vehicle body to mesh with the chain of the caterpillar, and positioned between the drive motor and the drive sprocket One end is connected to the rotating shaft of the drive motor, the other end is provided with a universal joint connected to the drive sprocket, the sprocket boss is formed on each of the other end of the drive sprocket and the universal joint, the drive sprocket and the universal The other end of the joint It is characterized in that the spline shaft is connected to each other by inserting a spline shaft.

In addition, in the power transmission device for a multi-purpose agricultural electric vehicle according to the present invention, a spline boss is formed at one end of the universal joint, a spline portion is formed at a distal end of the rotation shaft of the drive motor, and the rotation shaft of the drive motor and the universal joint are The other end is characterized by being connected to each other by inserting the spline portion of the rotation shaft of the drive motor into the spline boss of the universal joint.

In addition, in the multi-functional agricultural electric vehicle power transmission device according to the present invention, bearing shafts are formed to protrude on both sides of the drive sprocket, and the drive sprocket is provided with the drive sprocket on each of a pair of bearing blocks coupled to the track support frame. It is characterized in that the bearing shaft is axially supported and rotatably mounted on the track support frame.

In addition, in the multi-functional agricultural electric vehicle power transmission device according to the present invention, each of the bearing blocks, a bearing insert hole is formed in the center, a block body coupled to the track support frame, and a thrust bearing inserted into the bearing insert hole And, it characterized in that the support end is inserted into the bearing insertion hole at one side of the bearing insertion hole includes a bearing support cap coupled to the block body to support the outer ring of the thrust bearing.

In addition, the power transmission device for a multi-purpose agricultural electric vehicle according to the present invention is provided with an orbital tensioning device that maintains an infinite orbital tension at a front end or a rear end of the orbital support frame, wherein the orbital tensioning device is a front end of the orbital support frame. Or it is characterized in that it is configured to be provided with a hydraulic cylinder rotatably mounted to the hydraulic cylinder so that the caterpillar is supported with a length extending forward and backward at the rear end and the caterpillar.

The power transmission device for a multi-functional agricultural electric vehicle according to the present invention by the above configuration is a sprocket having a track sprocket and a driving electric shaft for rotating a track for driving a vehicle body of a harvester connected by a spline structure and mounted on a bearing block. It has a structure that is easy to assemble and disassemble and maintain because it is configured to be supported.

1 is a side view showing a multifunctional agricultural electric vehicle equipped with a power transmission device for a multifunctional agricultural electric vehicle according to an embodiment of the present invention
Figure 2 is a plan view showing a multi-functional agricultural electric vehicle equipped with a power transmission device for a multi-functional agricultural electric vehicle according to an embodiment of the present invention
Figure 3 is a front view showing a power transmission device for a multi-functional agricultural electric vehicle according to an embodiment of the present invention
Figure 4 is a cross-sectional view showing a part of the power transmission device for a multi-functional agricultural electric vehicle according to an embodiment of the present invention in detail
5 is a side view conceptually showing a track tension device and its operation of a multi-functional agricultural electric vehicle equipped with a power transmission device for a multi-functional agricultural electric vehicle according to an embodiment of the present invention

Hereinafter, a power transmission device for a multi-functional agricultural electric vehicle according to the present invention will be described in more detail with reference to an embodiment shown in the drawings.

1 is a side view showing a multi-functional agricultural electric vehicle equipped with a power transmission device for a multi-functional agricultural electric vehicle according to an embodiment of the present invention, Figure 2 is a multi-functional agricultural electric vehicle power transmission device according to an embodiment of the present invention It is a plan view showing a multi-functional agricultural electric vehicle provided, Figure 3 is a front view showing a power transmission device for a multi-functional agricultural electric vehicle according to an embodiment of the present invention, Figure 4 is a multi-functional agricultural electric according to an embodiment of the present invention It is a cross-sectional view showing a part of a power transmission device for a vehicle in detail, and FIG. 5 conceptually shows a track tension device and its operation of a multi-function agricultural electric vehicle equipped with a power transmission device for a multi-functional agricultural electric vehicle according to an embodiment of the present invention One side view.

The power transmission device 10 for a multi-functional agricultural electric vehicle according to the present invention includes the power of the driving motor 11 in the multi-functional agricultural electric vehicle 1 in which the caterpillar 5 receives the rotational force of the driving motor 11 to drive the vehicle body. It is a device provided to transmit the caterpillar (5).

The multi-functional agricultural electric vehicle 1 is configured to be capable of driving with a car body having a substantially rectangular outline and a caterpillar 5 mounted on the left and right sides of the car body.

Referring to the drawings, the vehicle body frame (2) disposed crosswise and vertically intersecting each other is a structure is formed, the vehicle body frame (2) is connected to both sides of the structure in the longitudinal direction of the track support frame (3) This arrangement has a structure attached to both sides of the structure to which the vehicle body frame 2 is connected.

The plurality of track support rollers 4 for supporting the caterpillar 5 are arranged in a circle along the caterpillar 5 inside the caterpillar 5 so as to be rotatable on the track support frame 3 It is mounted. The caterpillar 50 is supported by the orbit support roller 4 and rotated.

On the other hand, a drive sprocket 15 coupled to a chain (not shown in the figure) of the caterpillar 5 to transmit a rotational force for rotationally driving the caterpillar 5 to the rear end of the track support frame 3 ) Is mounted, and a track tensioning device 20 is installed at the front end of the track support frame 3 to keep the caterpillar 5 tightly maintained. A part of the plurality of track support rollers 4 is mounted on the track tensioning device 20 to support the track 5 so that tension is maintained in the track 5.

Referring to the drawings, the power transmission device 10 for a multifunctional agricultural electric vehicle according to an embodiment of the present invention is a drive motor 11, a brake disc 12, a universal joint 13, a spline shaft 14, a drive sprocket 15 and a bearing block 16 are provided.

The driving motor 11 is configured to generate a rotational force for driving the multi-function agricultural electric vehicle 1, and the rotational force generated is to rotate the caterpillar 5. In the drawing, the driving motor 11 is shown in an embodiment provided with one corresponding to each of the left and right caterpillars 5 in the rear position of the vehicle body, respectively.

The brake disk 12 is coupled to the rotating shaft 111 of the drive motor 11, and a spline portion for engaging the spline boss 131 of the universal joint 13 at the distal end of the rotating shaft 111. 112 is formed.

The rotation shaft 111 of the drive motor 11 and the universal joint 13 are connected to each other by inserting the rotation shaft spline portion 112 of the drive motor 11 into the spline boss 131 of the universal joint 13. .

The brake disk 12 is to configure a brake device for braking of a vehicle together with a brake block (not shown in the figure). In the present invention, the brake disk 12 is a rotating shaft 111 of the drive motor 11 ).

The universal joint 13 is interposed between the drive motors 11 and the drive sprockets 15 to connect them. That is, the universal joint 13 is located between the drive motor 11 and the drive sprocket 15, one end is connected to the rotation shaft 111 of the drive motor 11, the other end is the drive sprocket 15 Is connected to. As described above, the universal joint 13 connecting the drive motor 11 and the drive sprocket 15 is applied to the shaft connecting the drive motor 11 and the drive sprocket 15 even when a torsion occurs in the vehicle body. It is to absorb bending shock.

Particularly, the present invention is composed of a spline joint structure in which the connection between the universal joint 13 and the rotating shaft 111 of the drive motor 11 and the connection between the universal joint 13 and the drive sprocket 15 are formed. It is characterized by being configured to have a structure that is easily decomposed. In addition, since the universal joint 13 connected by a spline joint structure and the rotation shaft 111 of the drive motor 11, as well as between the universal joint 13 and the drive sprocket 15, is a structure capable of relatively sliding in the axial direction. Even if an impact is applied in the axial direction, the impact is absorbed by sliding.

For the spline joint structure, spline shafts 131 and 132 are formed at both ends of the universal joint 13 to engage and engage a spline shaft. One end of the universal joint 13 is inserted into the spline portion 112 formed at the end of the rotation shaft 111 of the drive motor 11 in the spline boss 131 formed at one end thereof, the rotation axis of the drive motor 11 ( 111). In addition, the other end of the universal joint 13 is a spline shaft 132 connected to the drive sprocket 15, the other end of which is inserted into the spline boss 151 of the drive sprocket 15 in the spline boss 132 formed on the other end ( One end of 14) is inserted and connected to the drive sprocket 15.

The spline shaft 14 is a shaft member for connecting the universal joint 13 and the drive sprocket 15, the spline boss 132 formed on the other end of the universal joint 13 on the outer surface and the drive sprocket 15 ) Has a shape in which a spline for engaging the spline boss 151 formed in) is formed. The drive sprocket 15 and the other end of the universal joint 13 are connected to each other by inserting a spline shaft 14 into each spline boss 132,151.

Since the universal joint 13 and the driving sprocket 15 have a structure connected to each other by the spline shaft 14, the universal joint 13 and the driving sprocket 15 are relatively movable in the axial direction. It is possible to absorb an axial shock.

The drive sprocket 15 is configured to rotate the caterpillar 5 by receiving the rotational force of the drive motor 11. The drive sprocket 15 is rotatably mounted on the track support frame 3 provided on each side of the vehicle body so as to mesh with the chain of the caterpillar 5. Referring to the drawings, a bearing block 16 is coupled to a rear end of the track support frame 3, and the drive sprocket 15 is axially supported by the bearing block 16 and rotatably installed.

To support the shaft of the drive sprocket 15, bearing shafts 152a and 152b are formed to protrude on both sides of the drive sprocket 15, penetrate the center of the bearing shafts 152a and 152b, and spline shaft 14 ) Is inserted to form a spline boss 151 for coupling. In the drive sprocket 15, bearing shafts 152a and 152b of the drive sprocket 15 are axially supported on each of the pair of bearing blocks 16 coupled to the track support frame 3, and the track support frame ( It is rotatably mounted on 3). In addition, the spline boss 151 of the drive sprocket 15 has one end inserted into the spline boss 132 formed at the other end of the universal joint 13 and the other end of the spline shaft 14 coupled thereto is inserted and coupled. do.

The bearing block 16 is configured to rotationally support the drive sprocket 15. That is, bearing shafts 152a and 152b protrude from both sides of the driving sprocket 15, and the driving sprocket 15 is a pair of bearing blocks 16 coupled to the track support frame 3, respectively. The bearing shafts 152a and 152b of the drive sprocket 15 are axially supported to be rotatably mounted on the track support frame 3.

Referring to the drawings, the bearing block 16 has a structure provided with a block body 161, a thrust bearing 162, and bearing support caps 163,164.

The block body 161 is a structure for being coupled to the track support frame 3 and the thrust bearing 162 to be coupled. In the upper body block body 161, a bearing insertion hole 161a is formed in which the outer ring of the thrust bearing 162 is pressed and coupled.

The thrust bearing 162 is a configuration for the drive sprocket 15 to be rotationally supported, and the outer ring is press-fitted into the bearing insertion hole 161a of the block body 161, and the drive sprocket 15 is an inner ring. The bearing shafts 152a and 152b are press-fit and coupled. As described above, the multi-functional agricultural electric vehicle 1 not only has a torsional impact on the vehicle body due to the driving environment of the rough terrain, but also repeatedly applies an axial impact to the drive sprocket 15 through the caterpillar 5. , This leads to an axial impact being applied between the drive sprocket 15 and the bearing block 16. The present invention is provided with bearing blocks 16 on both sides of the drive sprocket 15 to withstand such an axial impact, and each of the bearing blocks 16 is equipped with a thrust bearing 162 suitable for axial load. It has a structure. In addition, the thrust bearing 162 has a structure coupled to the pair of bearing blocks 16 in opposite directions so as to have resistance to axial impacts in opposite directions.

The bearing support caps 163 and 164 are configured to support the outer ring of the thrust bearing 162 press-fitted into the bearing insertion hole 161a of the block body 161 so as not to deviate from the bearing insertion hole 161a. . Referring to the drawings, the bearing support caps 163 and 164 are formed with protruding support ends 163a and 163b inserted into the bearing insertion hole 161a to support the bearing in the state where the outer ring of the thrust bearing 162 is supported. Located on one side of the insertion hole (161a) is coupled to the block body (161). The bearing blocks 16 are located on both sides of the drive sprocket 15, and in the case of a bearing block 16 disposed between the drive sprocket 15 and the universal joint 13, the bearing support cap A through hole 163a for passing the shaft is formed at 163.

The track tensioning device 20 has a constant external force to the track 5 so that the track 5 supported by the track support roller 4 provided in the track support frame 3 is pulled tightly and the tension is maintained. It is a configuration for adding. Referring to the drawings, the track tensioning device 20 is configured to be provided with a hydraulic cylinder 21 and a roller mounting bracket 22 is installed in the front end of the track support frame (3).

The hydraulic cylinder 21 is configured to form a force in a direction T in which the caterpillar 5 is pulled taut by the pressure of hydraulic oil. Referring to the drawings, the hydraulic cylinder 21 is inserted into the cylinder case 211 coupled to the front end of the track support frame 3, and the cylinder case 211 to emerge from the cylinder case 211 It consists of a cylinder rod (212). When hydraulic oil is injected into the cylinder case 211, the cylinder rod 212 advances forward with the pressure of the hydraulic oil, thereby applying a force in a direction T in which the caterpillar 5 is pulled tight. When the caterpillar 5 is to be separated, when the hydraulic oil filled in the cylinder case 211 is discharged, the cylinder rod 212 is reversed, and accordingly, the caterpillar 5 is loosened, and removal from the orbital support roller 4 is performed. It becomes possible.

The roller mounting bracket 22 is configured to provide a structure for the track support roller 4 for supporting the caterpillar 5 to be rotationally supported. Referring to the drawings, the roller mounting bracket 22 is coupled to the front end of the cylinder rod 212, and has a structure in which the track support roller 4 is rotatably mounted above and below it.

The drawings and the power transmission device for a multi-functional agricultural electric vehicle described above are only one embodiment for carrying out the present invention and should not be interpreted as limiting the technical spirit of the present invention. The protection scope of the present invention is defined only by the matters described in the following claims, and the improved and modified embodiments without departing from the gist of the present invention are apparent to those skilled in the art to which the present invention pertains. It will be said that it belongs to the protection scope of the present invention.

1 Multi-functional agricultural electric vehicle
2 body frame
3 track support frame
4 track support roller
5 caterpillar
10 Power transmission
11 Drive motor
111 axis of rotation
112 spline section
12 brake discs
13 Universal joint
131,132 spline boss
14 spline shaft
15 drive sprocket
151 spline boss
152a, 152b bearing shaft
16 bearing blocks
161 block
161a bearing insertion hole
162 thrust bearing
163,164 bearing support cap
163a, 164a support
163b through hole
20 track tension device
21 hydraulic cylinder
211 cylinder case
212 cylinder rod
22 Roller mounting bracket

Claims (4)

In the multi-function agricultural electric vehicle that the caterpillar receives the rotational force of the drive motor to drive the vehicle body, the power transmission device for the multi-functional agricultural electric vehicle provided to transmit the power of the drive motor to the caterpillar,
A drive sprocket rotatably mounted to a track support frame provided on each side of the vehicle body to mesh with the chain of the caterpillar;
Located between the drive motor and the drive sprocket, one end is connected to the rotating shaft of the drive motor, the other end is provided with a universal joint connected to the drive sprocket,
Spline bosses are respectively formed at the other ends of the driving sprocket and the universal joint,
The drive sprocket and the other end of the universal joint is connected to each other by inserting a spline shaft into the spline boss, the power transmission device for a multi-purpose agricultural electric vehicle. According to claim 1,
Spline boss is formed at one end of the universal joint,
A spline portion is formed at an end portion of the rotation shaft of the drive motor,
The rotating shaft of the drive motor and the other end of the universal joint are connected to each other by inserting the spline boss of the rotating shaft of the drive motor into the spline boss of the universal joint. The method according to claim 1 or 2,
The bearing shaft protrudes to both sides of the drive sprocket,
The drive sprocket is a multi-functional agricultural electric vehicle power transmission device, characterized in that the bearing shaft of the drive sprocket is axially supported on each of the pair of bearing blocks coupled to the track support frame and rotatably mounted on the track support frame. According to claim 3,
Each of the bearing blocks, a bearing insert hole is formed in the center, and a block body coupled to the track support frame,
A thrust bearing inserted into the bearing insertion hole,
A power transmission device for a multi-functional agricultural electric vehicle comprising a bearing support cap coupled to the block body so that a support end is inserted into the bearing insertion hole at one side of the bearing insertion hole to support the outer ring of the thrust bearing.

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