Agricultural tractor

Abstract

The invention relates to an agricultural tractor. A steering unit of an agricultural tractor is coupled to a coupled body located in a power generation chamber. According to the invention, the assembly of the cab and the transmission can be maintained, and the vibration and noise of the riding space can be reduced.

Description

Technical Field

[0001] The invention relates to an agricultural tractor, in particular to a steering structure. Background Art

[0002] An agricultural tractor is a working machine (or vehicle) that is used for various purposes by attaching and detaching working tools having different functions.

[0003] Since agricultural tractors use the power generated by a power generator (mainly an internal combustion engine) to move forward and backward in the same way as ordinary cars, they must be equipped with a steering gear for changing the direction of movement.

[0004] Generally, a steering gear is composed of a steering wheel, a steering unit, and the like.

[0005] The steering unit is implemented to convert the direction of the steering wheel by converting the rotational force of the steering wheel operated by the driver into a linear movement force.

[0006] Since the main use area of ​​agricultural tractors is the working space, the state of contact between the steering wheel and the ground is very uneven. This makes it difficult for the driver to operate the steering wheel. Therefore, the steering unit requires a mechanism that provides additional assist force when the driver wants to turn the steering wheel.

[0007] Unlike ordinary cars, agricultural tractors mainly use hydraulic pressure as an auxiliary force. In this case, since the hydraulic pump is operated to apply the auxiliary force to the steering unit, a hydraulic line needs to be provided between the hydraulic pump and the steering unit.

[0008] Generally, the steering unit is arranged inside the passenger space of the cab, and the hydraulic pump is arranged on the engine or transmission side. In addition, a hydraulic line connects the hydraulic pump and the steering unit to transfer the working fluid from the hydraulic pump to the steering unit. However, the above arrangement has several problems.

[0009] First, the vibration and noise of the engine and hydraulic pump are transmitted directly to the driver in the riding space of the cab along the hydraulic lines. Unlike airborne noise or vibration and noise transmitted through the cab frame, vibration and noise transmitted along the hydraulic lines are very difficult to reduce.

[0010] Second, when the cab is separated from the transmission or connected to the transmission, additional hydraulic line disconnection or connection operations are required. At this time, since the working space is very narrow, it is difficult to disconnect or connect the hydraulic line.

[0011] For the above reasons, various technical solutions for separating the steering unit from the driver have been proposed. However, the existing technical solutions have the problem that it is difficult to ensure space and design, and the material cost increases, thereby increasing the production cost. As a reference, the technology of Korean Publication No. 10-2009-0090510 (Invention Title: Steering Device of Tractor Cab with Noise and Vibration Prevention Function), which is one of the existing technical solutions (hereinafter referred to as "existing technology"), will be described.

[0012] According to the prior art, a steering unit (named "power steering unit" in the prior art) is arranged below the cab. As a result, the prior art has the advantage of reducing noise and vibration transmitted to the driver along the hydraulic line. However, the prior art still has the following various difficulties.

[0013] First, there is usually a transmission under the cab, and the cab and the transmission are combined. However, if you want to use the existing technology, you need to place the steering unit under the cab, so you need to slightly change the position and structure of the transmission. In addition, the power transmission structure between the engine and the transmission also needs to be redesigned. In addition, such a change will greatly increase the initial cost in terms of the new design and stability inspection of the power transmission structure.

[0014] Second, because the steering unit is also directly combined with the bottom plate of the cab in the prior art, the cab cannot completely get rid of the vibration and noise transmitted by the steering unit. Of course, the prior art attempts to minimize the vibration and noise by separating the cab and the steering unit and configuring buffer materials. Even with such a structure, two problems cannot be solved.

[0015] First, the cushioning material also acts as a medium for transmitting vibration and noise to a certain extent, so within its limits, there are limitations in reducing vibration and noise.

[0016] Secondly, there is a problem with the connection between the transmission shaft (the shaft connecting the steering wheel and the steering unit) and the steering unit. When the cab is connected to the transmission, the transmission shaft is usually connected to the steering unit while being connected to the cab. Therefore, the transmission shaft is designed to be detachably engaged with the steering unit using a spline connection. Such a design has the advantages of improving the assembly of agricultural tractors and reducing the noise and vibration transmitted to the cab through the transmission shaft. However, referring to the prior art Figure 3, it can be known that the steering unit is separated from the ground and the cab. In this case, it is obvious that the steering unit and the cab cannot be tightly fixed using only the buffer material. Then, it is necessary to fix the transmission shaft to the steering unit or set an additional fixing means inside the buffer material. In this case, the assembly of the agricultural tractor will be reduced, and the efficiency of suppressing noise and vibration transmitted from the steering unit to the cab will be halved. Summary of the invention

[0017] Problem that the invention aims to solve

[0018] The present invention proposes a structure that can maximally separate a cab and a steering unit in order to maximally reduce vibration and noise transmitted along the steering unit while ensuring assembly, and a structure that can maximally reduce design changes of existing structures.

[0019] Means used to solve problems

[0020] The agricultural tractor of the first form of the present invention comprises: a power generator, which is located in a power generating chamber and generates power; an advance and retreat mechanism, which comprises a driving wheel and a steering wheel, wherein the driving wheel rotates in conjunction with the operation of the power generator to generate an advance and retreat force, and the steering wheel is used to adjust the advance and retreat direction; a transmission, which converts the rotation speed according to the operation of the power generator and inputs it to the driving wheel; a cab, which is arranged behind the power generating chamber and above the transmission, forming a riding space for a driver to ride; and a steering gear, which manipulates the steering wheel so as to be able to adjust the driving direction; the steering gear comprises: a steering wheel, which a driver in the riding space can rotate and operate to manipulate the direction of the steering wheel; a steering unit, which helps to convert the direction of the steering wheel by using the rotation force applied to the steering wheel by the driver; and a transmission unit, which transmits the rotation force of the steering wheel to the steering unit, and has a plurality of rotating shafts connected to each other; one side of the transmission unit is coupled to the steering wheel, and the other side of the transmission unit is coupled to the steering unit, and the coupled body coupled to the steering unit is located in the power generating chamber.

[0021] The plurality of rotating shafts include: a first rotating shaft, one side of which is coupled to the steering wheel so as to rotate together with the steering wheel; a second rotating shaft, the other side of which is coupled to the steering unit and rotates in conjunction with the rotation of the first rotating shaft; a third rotating shaft, which is arranged between the first rotating shaft and the second rotating shaft, rotates in conjunction with the first rotating shaft and transmits the rotational force of the first rotating shaft to the second rotating shaft; a first universal joint, which connects the other side of the first rotating shaft with one side of the third rotating shaft; and a second universal joint, which connects one side of the second rotating shaft with the other side of the third rotating shaft.

[0022] At least one of a first angle formed by the first rotation axis and the vertical line, a second angle formed by the second rotation axis and the vertical line, and a third angle formed by the third rotation axis and the vertical line has a different angle.

[0023] The combined object is the power generator.

[0024] The agricultural tractor of the present invention further includes a mounting bracket for mounting the steering unit on the coupled body. The mounting bracket may preferably have a shape for ensuring a separation space so that the steering unit and the coupled body are coupled with a gap.

[0025] The mounting bracket includes: a first coupling portion coupled to the coupled body; a second coupling portion formed to be separated from the first coupling portion by the separation space, the steering unit being coupled to the second coupling portion; and a separation portion connecting the first coupling portion and the second coupling portion to be separated from each other.

[0026] The separation space is located between the coupled object and the diverting unit, and the second coupling portion and the separation portion may have an angle φ greater than 0 degrees and less than 90 degrees.

[0027] The second combining portion has an angle greater than 90 degrees with the separating portion.

[0028] The diverting unit may be disposed in the partitioned space.

[0029] The second coupling portion has a shaft through hole, and the transmission unit is coupled to the steering unit through the shaft through the through hole.

[0030] The mounting bracket may further include a guide portion for guiding the coupling of the steering unit with the transfer unit.

[0031] The steering unit is spaced apart from the transmission.

[0032] Effects of the Invention

[0033] According to the present invention, the following effects are achieved.

[0034] First, since the cab can be isolated from vibration and noise caused by the operation of the power generator and the hydraulic pump as much as possible while maintaining simple assembly between the cab and the transmission, a comfortable driving environment can be provided to the driver.

[0035] Second, by effectively utilizing the power generating chamber with relatively more available space, the design changes of other components can be minimized or even prevented, thereby suppressing the increase in production costs caused by the use of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of an agricultural tractor according to a first embodiment of the present invention.

[0037] Figure 2 Is applicable to Figure 1 A conceptual enlarged schematic diagram of a transfer unit of a steering gear of an agricultural tractor.

[0038] Figure 3 Is applicable to Figure 1 A conceptual enlarged schematic diagram of a mounting bracket for an agricultural tractor.

[0039] Figures 4 to 6 It is a schematic reference diagram for explaining the main parts of the agricultural tractor according to the second embodiment of the present invention. DETAILED DESCRIPTION

[0040] Preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, for the sake of brevity, the description of well-known structures will be omitted or reduced as much as possible.

[0041] <First Embodiment>

[0042] 1. Description of the composition

[0043] Figure 1 FIG. 1 is a schematic diagram of an agricultural tractor 100 according to an embodiment of the present invention.

[0044] The agricultural tractor 100 according to an embodiment of the present invention includes a power generator 110 , an advance and retreat mechanism 120 , a transmission 130 , a cab 140 , a steering gear 150 , and a mounting bracket 160 .

[0045] The power generator 110 generates power for the operation of the agricultural tractor 100 and is located in the power generation chamber PSR.

[0046] The power generator 110 may be an internal combustion engine (diesel engine, gasoline engine, bioenergy engine, etc.), and further, may also be an electric motor.

[0047] The power generation room PSR is defined as a space for accommodating the power generator 110 , and further accommodates a plurality of components associated with the power generator 110 , such as a cooling device (not shown).

[0048] The advancing and retreating mechanism 120 can generate an advancing and retreating force (advancing and retreating force) in conjunction with the operation of the power generator 110 . The advancing and retreating mechanism 120 includes a driving wheel 121 and a steering wheel 122 .

[0049] The driving wheel 121 is configured to be rotatable in conjunction with the operation of the power generator 110 so that the agricultural tractor 100 generates forward and backward force. The driving wheel 121 is usually configured as a rear wheel.

[0050] The steering wheel 122 is arranged to adjust the forward and backward direction of the agricultural tractor 100, and the steering wheel 122 is usually configured as a front wheel. Of course, the steering wheel 122 can also be implemented to generate forward and backward force.

[0051] The transmission 130 is provided to convert the rotation speed or the forward and reverse direction based on the operation of the power generator 110 and input the converted rotation speed to the driving wheels 121 .

[0052] The operator's cab 140 is disposed behind the power generating chamber PSR and above the transmission 130 .

[0053] The cab 140 forms a riding space BS for a driver to ride in, and is coupled to the transmission 130 .

[0054] The steering gear 150 can adjust the driving direction by manipulating the steering wheel 122. To this end, the steering gear 150 includes a steering wheel 151, a steering unit 152, a transmission unit 153, a hydraulic pump 154, and the like.

[0055] The steering wheel 151 is rotated and operated by a driver in the riding space BS in order to steer the direction of the steering wheel 122 .

[0056] The steering unit 152 helps convert the driver's rotational force applied to the steering wheel 151 into a linear force to convert the direction of the steering wheel 122. That is, the steering unit 152 uses the driver's rotational force applied to the steering wheel 151 to convert the direction of the steering wheel 122. The steering unit 152 in this embodiment is located in the power generation chamber PSR.

[0057] In the present embodiment, the steering unit 152 is expected to have a power steering structure that adds an auxiliary force using hydraulic pressure to the rotational force input by the driver in addition to the rack and pinion structure that converts the rotational force into the linear force. However, even if the steering unit 152 has another power steering structure that applies an auxiliary force or does not have a power steering structure, it is not excluded from the present invention.

[0058] The transmission unit 153 may transmit the rotational force of the steering wheel 151 to the steering unit 152 .

[0059] like Figure 2 As shown in the conceptual enlarged schematic diagram of FIG. 1 , the transmission unit 153 in this embodiment has three rotation axes 153 - 1 to 153 - 3 and two universal joints 153 a and 153 b.

[0060] One side of the first rotating shaft 153 - 1 (the upper end portion in the drawing, hereinafter defined as the same direction portion) is coupled to the steering wheel 151 , and the first rotating shaft 153 - 1 rotates together with the steering wheel 151 by a rotational force input from the driver to the steering wheel 151 .

[0061] The other side of the second rotating shaft 153-2 (the lower end portion in the figure, hereinafter defined as the same direction portion) is detachably splined to the steering unit 152. The second rotating shaft 153-2 rotates in conjunction with the rotation of the first rotating shaft 153-1. The second rotating shaft 153-2 and the steering unit 152 are located in the power generation chamber PSR.

[0062] The third rotating shaft 153-3 is arranged between the first rotating shaft 153-1 and the second rotating shaft 153-2. The third rotating shaft 153-3 rotates in conjunction with the first rotating shaft 153-1 and transmits the rotational force of the first rotating shaft 153-1 to the second rotating shaft 153-2. As shown in this embodiment, it can be preferably considered that one side of the third rotating shaft 153-3 is arranged in the riding space BS and the other side is arranged in the power generating room PSR.

[0063] The first universal joint 153a connects the other side of the first rotation axis 153-1 and one side of the third rotation axis 153-3. The first universal joint 153a is disposed in the riding space BS.

[0064] The second universal joint 153b connects one side of the second rotating shaft 153-2 and the other side of the third rotating shaft 153-3. The second universal joint 153b is disposed in the power generating chamber PSR.

[0065] The number of the above-mentioned rotating shafts 153-1 to 153-3 and universal joints 153a, 153b can be increased or decreased according to the setting angle and length of the first rotating shaft 153-1 directly connected to the steering wheel 151, the configuration position and configuration angle of the steering unit 152, etc. However, as a whole, one side of the transmission unit 153 is configured in the riding space BS, and the other side of the transmission unit 153 is configured in the power generation chamber PSR.

[0066] The hydraulic pump 154 ​​supplies hydraulic pressure to the steering unit 153. The hydraulic pump 154 ​​is provided in the power generating chamber PSR. Preferably, the hydraulic pump 154 ​​may be fixedly attached to the power generator 110 as in the present embodiment.

[0067] The mounting bracket 160 is provided to couple the steering unit 152 to the power generator 110. That is, the steering unit 152 is coupled to the power generator 110 as a coupled body through the mounting bracket 160. Figure 3 As shown in the conceptual enlarged schematic diagram, when viewed from the side, the mounting bracket 160 has a "U" shape that is generally open downward. If the mounting bracket 160 is distinguished in more detail, the mounting bracket 160 can be divided into a first coupling portion 161, a second coupling portion 162 and a separation portion 163.

[0068] The first coupling portion 161 is coupled to the power generator 110 .

[0069] The second coupling portion 162 is coupled to the diverting unit 152 . In other words, the diverting unit 152 is coupled to the second coupling portion 162 .

[0070] The separation portion 163 can separate the first coupling portion 161 from the second coupling portion 162 while connecting the first coupling portion 161 and the second coupling portion 162 , so that the steering unit 152 is slightly separated from the power generator 110 .

[0071] The purpose of setting the steering unit 152 to be coupled to the power generator 110 in a state separated from the power generator 110 is to minimize the phenomenon that the noise and vibration generated by the power generator 110 are input to the steering unit 152. Therefore, any form can be used as the form of the mounting bracket 163 as long as it forms a separation space SS between the power generator 110 and the steering unit 152. That is, the mounting bracket 160 needs to be set to a structure that ensures the separation space SS so that the steering unit 152 can be coupled to the power generator 110 in a state with a gap.

[0072] In addition, when viewed from the side, although the first coupling portion 161 is parallel to the vertical line PL1, the second coupling portion 162 has a predetermined angle α with the vertical line PL2. This is to tilt the configuration angle of the steering unit 152 so that the second rotation axis 153-2 can be properly spline-coupled to the steering unit 152. Therefore, the second coupling portion 162 and the separation portion 163 can have an angle φ greater than 0 degrees and less than 90 degrees. On the other hand, as Figure 2 As shown, even if the steering unit 152 is tilted, the axial direction of the first rotating shaft 153-1 can be different from the coupling direction between the steering unit 152 and the second rotating shaft 153-2. Specifically, as shown in this embodiment, the first angle β formed by the first rotating shaft 153-1 and the vertical line PL3 can be different from the second angle θ formed by the second rotating shaft 153-2 and the vertical line PL4. Therefore, it is necessary to set the second universal joint 153b. That is, the second universal joint 153b increases the degree of freedom of the configuration angle of the steering unit 152, and accordingly helps to effectively utilize the available space of the power generating chamber PSR. For example, if the third angle ω formed by the third rotating shaft 153-3 and the vertical line PL5 is considered, any two angles of the first angle β, the second angle θ, and the third angle ω can be the same, and only one angle is different. Alternatively, the first angle β, the second angle θ, and the third angle ω can all be different. In this way, by freely changing the values ​​of the first angle β, the second angle θ, and the third angle ω, a structure that is easy to assemble the cab 140 can be achieved.

[0073] According to the above-described embodiment, it can be understood that the steering unit 152 is disposed outside the boarding space BS, and the steering unit 152 is provided to be separated from the cab 140 in other regions except for the region spline-coupled with the transmission unit 153 .

[0074] Furthermore, the steering unit 152 is also separated from the transmission 130 , so there is no need to change the design of the transmission 130 .

[0075] 2. Description of assembly and disassembly procedures

[0076] In the assembly process of combining the cab 140 with the transmission 130, the cab 140 is combined with the transmission 130 in a state where the steering wheel 151 and the transmission unit 153 are assembled to the cab 140. At this time, the operator can fix the cab 140 and the transmission 130 after spline-combining the other side of the second rotating shaft 153-2 with the steering unit 152.

[0077] In the disassembly process of separating the cab 140 from the transmission 130, after releasing the fixing of the cab 140 and the transmission 130, the cab 140 is easily disassembled by lifting the cab 140. At this time, the other side of the second rotating shaft 153-2 detachably coupled to the steering unit 152 is easily disassembled from the steering unit 152.

[0078] Of course, according to the present invention, in the process of coupling the cab 140 to the transmission 130 or separating the cab 140 from the transmission 130 , no additional connection and separation work of the hydraulic line FL is accompanied.

[0079] 3. Description of vibration and noise during operation

[0080] According to the above embodiment, the steering unit 152 is located in the power generating chamber PSR in a state of being spatially separated from the cab 140. Thus, the hydraulic pump 154 ​​and the hydraulic line FL are also located in the power generating chamber PSR. In addition, the steering unit 152 is mechanically separated from the cab 140 in other areas except for the area spline-coupled with the transmission unit 153. In addition, the steering unit 152 is coupled to the power generator 110 using the mounting bracket 160 forming the separation space SS.

[0081] Therefore, the vibration and noise generated in the power generator 110 are attenuated in the mounting bracket 160. In addition, the vibration and noise of the power generator 110 reduced in the mounting bracket 160 and the vibration and noise of the power generator 110 and the hydraulic pump 154 ​​transmitted along the hydraulic line FL are attenuated again in the spline coupling structure between the steering unit 152 and the second rotating shaft 153-2. In addition, since the steering unit 152 is mechanically separated from the cab 140 in an area other than the area coupled with the transmission unit 153, the vibration and noise cannot be input to the riding space BS through other positions. In addition, this provides the driver with a sense of comfort that is quite free from vibration and noise.

[0082] <Second Embodiment>

[0083] The construction of the agricultural tractor 100 according to the second embodiment of the present invention is the same as that of the first embodiment. Therefore, the description of the general construction in the second embodiment refers to the description of the first embodiment.

[0084] However, the second embodiment is different from the first embodiment in the form of the mounting bracket 160 and the connection and arrangement of the mounting bracket 160 and the steering unit 152. This will be described in addition.

[0085] Figure 4 It is a conceptual diagram of the main parts of the agricultural tractor 100 according to the second embodiment.

[0086] The mounting bracket 160 in the second embodiment may be divided into a first combining portion 161 , a second combining portion 162 , a separating portion 163 , and a guiding portion 164 .

[0087] The first coupling portion 161 is coupled to the power generator 110. Further, the first coupling portion 161 may also be coupled to other coupled bodies located in the power generating room PSR other than the power generator 110. Of course, the mounting bracket 160 in the second embodiment does not need to be interpreted as being limited to coupling the steering unit 152 to a coupled body located in the power generating room PSR.

[0088] The second coupling portion 162 is coupled to the steering unit 152. Such a second coupling portion 162 has a shaft through hole 162a.

[0089] The transmission unit 153 may be coupled to the steering unit 152 through the shaft through hole 162a. More specifically, the second rotation shaft 153-2 of the transmission unit 153 may pass through the shaft through hole 162a. Therefore, the second rotation shaft 153-2 may be spline-coupled with the steering unit 152 through the shaft through hole 162a.

[0090] In the second embodiment as well, a separation space SS is formed between the first coupling portion 161 and the second coupling portion 162 .

[0091] The spacing portion 163 connects the first coupling portion 161 and the second coupling portion 162 to be spaced apart from each other.

[0092] According to the present embodiment, the width of the separation space SS increases as it approaches the bottom. Therefore, unlike the first embodiment, in the second embodiment, the angle δ formed by the second coupling portion 162 and the separation portion 163 is an obtuse angle greater than 90 degrees. In other words, one side of the second coupling portion 162 is implemented to face the steering wheel 151. One side is the opposite side of the side facing the separation space SS.

[0093] The guide portion 164 is provided to guide the coupling between the diverting unit 152 and the transfer unit 153 .

[0094] The guide portion 164 is formed to protrude from one surface of the second coupling portion 162 laterally toward the steering wheel 151 .

[0095] The guide portion 164 is implemented as a cylindrical shape having a guide hole 164a. In addition, the guide hole 164a is arranged on the same line as the shaft through hole 162a. Therefore, the assembler can more easily spline the steering unit 152 with the transmission unit 153 by inserting the lower end portion of the transmission unit 153 into the guide hole 164a of the protruding guide portion 164. More specifically, the assembler can easily spline the steering unit 152 with the transmission unit 153 by inserting the end (lower end) of the second rotating shaft 153-2 of the transmission unit 153 into the guide hole 164a.

[0096] Of course, the guide portion 164 may have any form as long as it can guide the connection between the steering unit 152 and the transmission unit 153 .

[0097] According to the second embodiment as described above, there are the following additional advantages.

[0098] First, the partition space SS can be used as a space for installing the diverting unit 152. Therefore, the space for installing the diverting unit 152 can be reduced, and the design of the space becomes easier accordingly.

[0099] Second, if Figure 5 As shown, the first rotation axis 153 - 1 , the second rotation axis 153 - 2 , and the third rotation axis 153 - 3 may be arranged side by side in a substantially straight line.

[0100] like Figure 6 As shown in the reference figure, such a configuration can omit any one of the first universal joint 153a and the second universal joint 153b. In other words, the third rotation shaft 153-3 can also be omitted. Therefore, the production cost of the transmission unit 153 can be reduced accordingly.

[0101] Furthermore, when the cab 140 is disposed on the transmission 130 , the spline connection between the transmission unit 153 and the steering unit 152 can be more easily achieved, thereby improving the workability.

[0102] Third, the steering unit 152 may be spaced apart from the partition portion 163 by a predetermined interval d. Such a configuration can further reduce the vibration shock of the power generator 110 that may be input to the steering unit 152. Therefore, correspondingly, a more comfortable riding space BS environment can be created.

[0103] Fourthly, since the steering unit 152 is disposed in the separation space SS, the mounting bracket 160 protects the steering unit 152 from being affected by external interference objects.

[0104] On the other hand, in the above-mentioned embodiment, the steering unit 152 is mounted on the power generator 110 by using the mounting bracket 160. However, considering the position of the available spare space in the power generation room PSR, the mounting bracket 160 may also be configured to mount the steering unit 152 on a coupled body other than the power generator 110 (e.g., a support frame supporting the power generator, a support frame supporting the hood, the hood, etc.). That is, the coupled body to which the steering unit 152 is coupled may be selected under the premise of not requiring or minimizing the design changes of other components.

[0105] The above embodiments are only preferred examples of the present invention, and the present invention can have various application forms. Therefore, it should not be understood that the present invention is limited to the above content. On the contrary, the scope of rights of the present invention should be understood as the attached claims and their equivalents.

Claims

1. An agricultural tractor, wherein: include: A power generator (110), located in the power generation chamber (PSR), generates power; The advance and retreat mechanism (120) comprises a driving wheel (121) and a steering wheel (122), wherein the driving wheel (121) rotates in conjunction with the operation of the power generator (110) to generate an advance and retreat force, and the steering wheel (122) is used to adjust the advance and retreat direction; A transmission (130) converts the rotation speed based on the operation of the power generator (110) and inputs the rotation speed to the driving wheel (121); A cab (140) is arranged behind the power generating chamber (PSR) and above the transmission (130), forming a riding space (BS) for a driver to ride in; as well as A steering device (150) for manipulating the steering wheel (122) so as to adjust the driving direction; The diverter (150) comprises: a steering wheel (151), which can be rotated and operated by a driver in the riding space (BS) to control the direction of the steering wheel (122); A steering unit (152) that helps convert the direction of the steering wheel (122) using the rotational force applied to the steering wheel (151) by the driver; and A transmission unit (153) for transmitting the rotational force of the steering wheel (151) to the steering unit (152), and having a plurality of rotation axes connected to each other; One side of the transmission unit (153) is coupled to the steering wheel (151), and the other side of the transmission unit (153) is coupled to the steering unit (152). The body to be combined with the steering unit (152) is located in the power generating chamber (PSR).

2. The agricultural tractor according to claim 1, wherein: The plurality of rotation axes include: A first rotating shaft (153-1), one side of which is coupled to the steering wheel (151) so as to rotate together with the steering wheel (151); A second rotating shaft (153-2), the other side of which is combined with the steering unit (152) and rotates in conjunction with the rotation of the first rotating shaft (153-1); a third rotating shaft (153-3) disposed between the first rotating shaft (153-1) and the second rotating shaft (153-2), rotating in conjunction with the first rotating shaft (153-1) and transmitting the rotating force of the first rotating shaft (153-1) to the second rotating shaft (153-2); a first universal joint (153a) connecting the other side of the first rotating shaft (153-1) and one side of the third rotating shaft (153-3); and The second universal joint (153b) connects one side of the second rotation axis (153-2) and the other side of the third rotation axis (153-3).

3. The agricultural tractor according to claim 2, wherein: At least one of the first angle (β) formed by the first rotation axis (153-1) and the vertical line (PL3), the second angle (θ) formed by the second rotation axis (153-2) and the vertical line (PL4), and the third angle (ω) formed by the third rotation axis (153-3) and the vertical line (PL5) has an angle different from the others.

4. The agricultural tractor according to claim 1, wherein: The combined object is the power generator (110).

5. The agricultural tractor according to claim 1, wherein: It also includes a mounting bracket (160) for mounting the steering unit (152) on the coupled body. The mounting bracket (160) has a configuration for ensuring a separation space (SS) so that the steering unit (152) and the coupled body are coupled to each other with a gap therebetween.

6. The agricultural tractor according to claim 5, wherein: The mounting bracket (160) comprises: A first bonding portion (161) bonded to the bonded object; a second coupling portion (162) formed to be separated from the first coupling portion (161) by the separation space (SS), and the diverter unit (152) is coupled to the second coupling portion (162); and A separation portion (163) connects the first coupling portion (161) and the second coupling portion (162) to be separated from each other.

7. The agricultural tractor according to claim 6, wherein: The separation space (SS) is located between the combined body and the steering unit (152). The second combining portion (162) and the separating portion (163) have an angle greater than 0 degrees and less than 90 degrees.

8. The agricultural tractor according to claim 6, wherein: The second combining portion (162) and the separating portion (163) have an angle (δ) greater than 90 degrees.

9. The agricultural tractor according to claim 5, wherein: The deflection unit (152) is disposed in the separation space (SS).

10. The agricultural tractor according to claim 9, wherein: The second coupling portion (162) has a shaft through hole (162a), The transmission unit (153) is combined with the steering unit (152) through the shaft through hole (162a).

11. The agricultural tractor according to claim 9, wherein: The mounting bracket (160) further includes a guide portion for guiding the combination of the steering unit (152) and the transfer unit (153).

12. The agricultural tractor according to claim 1, wherein: The steering unit (152) is spaced apart from the transmission (130).

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