JP6346023B2 - Tractor - Google Patents

Description

The present invention relates to a farm tractor .

  2. Description of the Related Art Conventionally, work vehicles such as agricultural tractors include a cabin that covers a control seat on a traveling machine body (see, for example, Patent Documents 1 and 2). The cabins described in Patent Literatures 1 to 3 have a cabin frame that constitutes a framework, and a roof body that is disposed on the upper end side of the cabin frame. The cabin frame has a so-called frame structure in which a pillar body (pillar) and a beam body (beam) are combined, and rigidity is secured by the pillar body and the beam body.

JP 2002-67657 A JP 2004-345367 A

  By the way, regarding the structure of this type of cabin, there is a strong demand not only for cost reduction but also for ease of boarding and improvement of comfort inside the cabin. For example, it is desired to manage farming comfortably by managing air conditioning in the cabin or reducing noise in the cabin.

  This invention makes it a technical subject to provide the working vehicle which examined and improved the above present condition.

The invention according to claim 1 is a tractor including a cabin that covers a control seat on a traveling machine body, and a cabin frame constituting the framework of the cabin includes a pair of left and right front support columns, a pair of left and right rear support columns, A front beam body that connects the upper end portions of the front column bodies, a rear beam body that connects the upper end portions of the rear column bodies, and an upper end portion between the front column body and the rear column body that are arranged in the front-rear direction. And the rear beam body is formed in a U-shaped cross section and substantially U-shaped in a plan view in which the rear beam body protrudes rearward from the rear column bodies, and the inner surface side of the rear beam body is A horizontally elongated reinforcing beam body is disposed between the left and right ends extending forward in the rear beam body, and the left and right ends of the reinforcing beam body respectively correspond to the rear beam body. The rear beam body and the reinforcing beam body are connected to lower openings at the left and right ends, and the Is formed in a substantially rectangular frame shape in view, the interior side of the rear beam body is that houses the air conditioner.

According to a second aspect of the present invention, in the tractor according to the first aspect, in the cabin frame, left and right side portions of a seat frame body that supports the control seat are formed in a concavo-convex shape, and the seat frame body A back surface part is formed in the uneven | corrugated shape of a cross section, and the said back surface part is connected with the said left and right both sides .

  According to the present invention, in a work vehicle including a cabin that covers a control seat on a traveling machine body, a cabin frame that constitutes the framework of the cabin includes a pair of left and right front struts, a pair of left and right rear struts, and the front A front beam body that connects between the upper end portions of the column bodies, a rear beam body that connects between the upper end portions of the rear column bodies, and a gap between the upper end portions of the front column body and the rear column body that are arranged in the front-rear direction. A side beam body to be connected, the rear beam body is protruded rearward from the both rear column bodies, and an air conditioner is housed inside the rear beam body, so that the overall height of the cabin is increased. The air conditioner can be arranged inside the roof body without doing so, and the problem of limiting the operator's front view because the air conditioner is housed on the front side of the roof body, for example, can be avoided. In addition, since the air conditioner is accommodated inside the rear beam body, space saving of the air conditioner arrangement can be achieved.

According to the present invention, since the rear beam body is formed in a U-shaped cross section by pressing using a metal plate as a raw material, the rigidity of the rear beam body is improved without using a pipe material or the like. The weight of the rear beam body can be reduced.

It is a left view of a tractor. It is a top view of a tractor. It is a left view of a cabin. It is a front view of a cabin. It is a right view of a cabin. It is a rear view of a cabin. It is the perspective view which looked at the cabin frame from the front left diagonal upper side. It is the perspective view which looked at the cabin frame from back diagonally lower left. It is the perspective view which looked at the seat frame body from the front left diagonal upper side. It is the perspective view which looked at the seat frame object from back diagonally lower left. It is a top view in the roof body which abbreviate | omitted the outer roof. It is a bottom view of an inner roof. It is the isolation | separation perspective view of the roof body internal structure seen from the front left diagonal upper side. It is the isolation | separation perspective view of the roof body internal structure seen from back rear diagonally lower side.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings, taking a tractor as a work vehicle as an example.

  First, an outline of the tractor 1 will be described with reference to FIGS. 1 and 2. The traveling machine body 2 of the tractor 1 in the embodiment is supported by a pair of left and right rear wheels 4 as well as a pair of left and right front wheels 3 as a traveling unit. The tractor 1 is configured to travel forward and backward by driving the rear wheels 4 and the front wheels 3 with a common rail type diesel engine 5 (hereinafter simply referred to as an engine) as a power source mounted on the front portion of the traveling machine body 2. Has been. The engine 5 is covered with a bonnet 6. A cabin 7 is installed on the upper surface of the traveling machine body 2, and a steering seat 8 and a steering handle 9 that moves the steering direction of the front wheel 3 to the left and right by steering are disposed in the cabin 7. Has been. In this case, a steering column 32 is disposed in front of the control seat 8 in the cabin 7. The steering column 32 is erected in a state of being embedded in the back side of the dashboard 33 disposed on the front side inside the cabin 7. A steering handle 9 having a substantially round shape in plan view is attached to the upper end side of the handle shaft that protrudes upward from the upper surface of the steering column 32. Steps 10 on which the operator gets on and off are provided at the left and right lower portions of the cabin 7.

  The traveling machine body 2 includes an engine frame 14 having a front bumper 12 and a front axle case 13, a clutch housing 15 connected to the rear surface side of the engine 5, and a transmission case 17 connected to the rear surface side of the clutch housing 15. . The rear end side of the engine frame 14 is connected to the left and right outer surfaces of the engine 5. The front axle 16 protrudes outward from the left and right ends of the front axle case 13 so as to be rotatable. The front wheels 3 are attached to the left and right ends of the front axle case 13 via the front axle 16. The transmission case 17 appropriately changes the rotational power of the engine 5 and transmits it to the front and rear four wheels 3, 3, 4, 4. Left and right rear axle cases 19 are mounted on the left and right outer surfaces of the mission case 17 so as to protrude outward. Left and right rear axle cases 20 are rotatably inserted in the left and right rear axle cases 19. The rear wheel 4 is attached to the mission case 17 via the rear axle 20. Upper portions of the left and right rear wheels 4 are covered with left and right rear fenders 21.

  A hydraulic lifting mechanism 22 that lifts and lowers a working machine such as a rotary tiller is detachably attached to the rear upper surface of the mission case 17. Although details are omitted, a working machine such as a rotary tiller is connected to the rear portion of the transmission case 17 via a three-point link mechanism including a pair of left and right lower links and a top link. On the rear side surface of the mission case 17, a PTO shaft 25 for transmitting a PTO driving force to a working machine such as a rotary tiller is provided to project rearward.

  A flywheel 26 is attached to an engine output shaft (not shown) projecting rearward from the rear side surface of the engine 5. A main shaft 27 projecting rearward from the flywheel 26 and a main transmission input shaft 28 projecting forward from the front side of the transmission case 17 are connected via a power transmission shaft 29 having universal shaft joints at both ends. FIG. 1, FIG. 7 and FIG. 10). In the transmission case 17, a hydraulic continuously variable transmission, a forward / reverse switching mechanism, a traveling auxiliary transmission gear mechanism, and a differential gear mechanism for rear wheels are arranged. The rotational power of the engine 5 is transmitted to the main transmission input shaft 28 of the transmission case 17 via the main driving shaft 27 and the power transmission shaft 29, and is appropriately shifted by the hydraulic continuously variable transmission and the traveling auxiliary transmission gear mechanism. Then, the transmission power is transmitted to the left and right rear wheels 4 through the rear wheel differential gear mechanism.

  The front wheel output shaft 30 projecting forward from the lower front portion of the transmission case 17 projects rearward from the front axle case 13 containing a front wheel differential gear mechanism (not shown) via a front wheel drive shaft 31. A front wheel transmission shaft (not shown) is connected. Transmission power by the hydraulic continuously variable transmission and the traveling auxiliary transmission gear mechanism in the transmission case 17 is transmitted from the front wheel output shaft 30, the front wheel drive shaft 31, and the front wheel transmission shaft to the front wheel differential gear mechanism in the front axle case 13. Is transmitted to the left and right front wheels 3 via.

  Next, the detailed structure of the cabin 7 will be described with reference to FIGS. The cabin 7 that covers the control seat 8 on the traveling machine body 2 includes a cabin frame 100 that forms a framework. The cabin frame 100 connects a pair of left and right front strut bodies 101 located in front of the control seat 8, a pair of left and right rear strut bodies 102 located behind the control seat 8, and upper ends of the front strut bodies 101. The front beam body 103, the rear beam body 104 connecting the upper end portions of the rear column bodies 102, and the left and right side beam bodies connecting the upper end portions of the front column body 101 and the rear column body 102 arranged in front and rear. 105 and a substantially box-like one. A roof body 106 is detachably attached to the upper end side of the cabin frame 101, that is, on a rectangular frame constituted by the front beam body 103, the rear beam body 104, and the left and right side beam bodies 105.

  The rear beam body 104 of the embodiment is formed into a U-shaped section (groove shape) by pressing using a metal plate as a raw material, and as a whole protrudes rearward from the left and right rear column bodies 102 (overhang) E) It has a substantially U-shape in plan view. Therefore, the inner surface side of the rear beam body 104 opens forward. For this reason, the weight of the rear beam body 104 can be reduced while improving the rigidity of the rear beam body 104 without using a pipe material or the like. Between the left and right end portions extending forward in the rear beam body 104, left and right laterally long reinforcing beam bodies 111 are arranged. The left and right end portions of the reinforcing beam body 111 are connected to the lower opening portions of the corresponding left and right end portions in the rear beam body 104. For this reason, the rear beam body 104 and the reinforcing beam body 111 have a rectangular frame shape in plan view.

  The left and right outer end sides of the front lower plate plate 107 extending inward in the left and right directions are connected to the lower end side of each front support body 101. A vertically long board support plate 108 that fixes and supports the dashboard 33 is connected to the left and right inner ends of the left and right front lower plate plates 107. A board support plate 108 is erected between the left and right front support columns 101. The left and right front lower plate plates 107 are disposed across a floor plate. A rear end upper side of the rear fender 21 having a bulging shape along the front inner surface side of the rear wheel 4 is connected to the lower end side of each rear support body 102. The front end lower side of each rear fender 21 is connected to the rear end sides of the left and right front lower plate plates 107. A seat frame body 109 having a stepped shape when viewed from the side is attached to the lower end portions of the left and right rear support columns 102 and the left and right rear fenders 21. The control seat 8 is disposed on the seat frame body 109. An intermediate strut 110 is erected between the left and right front struts 101 and the rear struts 102. The upper end side of each intermediate column body 110 is connected to the front and rear halfway portions of the corresponding left and right side beam bodies 105. The lower end side of each intermediate strut 110 is connected to the front and rear halfway portions of the corresponding left and right rear fenders 21.

  A windshield 121 is disposed on the front side of the cabin frame 100, that is, in a region surrounded by the left and right front column bodies 101, the front beam body 103, and the left and right front lower plate plates 107. A rear glass 122 is disposed on the rear surface side of the cabin frame 100, that is, in a region surrounded by the left and right rear column bodies 102, the rear beam body 104 and the seat frame body 109. A transparent glass side door 123 and a side glass 125 are arranged side by side on the left and right side surfaces of the cabin frame 100. Each side door 123 is located between the front column body 101 and the intermediate column body 110. Each side door 123 is attached to the corresponding intermediate column 110 so that it can be opened and closed via a pair of upper and lower hinges 124. Each side glass 125 is located between the intermediate column body 110 and the rear column body 102, and is attached to the corresponding rear column body 102 through a pair of upper and lower hinges 126 so as to be opened and closed.

  The front portions of the left and right front lower plate plates 307 are connected to a front support 96 attached to the left and right side surfaces of the clutch housing 15 via a front vibration isolation rubber body 98 as a vibration isolation member (FIG. 1). reference). A pair of left and right base brackets 127 projecting rearward are provided on the lower side of the rear end of the seat frame body 109. Each base bracket 127 is connected to a rear support 97 attached to the left and right rear axle cases 19 via a rear vibration isolation rubber body 99 as a vibration isolation member. Accordingly, the traveling machine body 2 supports the cabin 7 in a vibration-proof manner via the plurality of vibration-proof rubber bodies 98 and 99.

  As shown in FIGS. 9 and 10, the seat frame body 109 that supports the control seat 8 includes a rear intermediate beam member 112 that extends parallel to the reinforcing beam body 111, and a pair of left and right members that extend downward from the rear intermediate beam member 112. And a rear lower frame 113. The rear intermediate beam member 112 is positioned between the lower end portions of the left and right rear support columns 102. The left and right end portions of the rear intermediate beam member 112 are connected to the lower end sides of the corresponding left and right rear column bodies 102, respectively. A base bracket 127 is attached to the lower end side of each rear lower frame 113. In the upper half between the left and right rear lower frames 113, an upper back plate 114 and a lower back plate 115 arranged in the vertical direction are arranged. The left and right end portions of the upper and lower rear plates 114 and 115 are connected to the corresponding left and right rear lower frames 113 respectively. The lower end side of the upper back plate 114 and the upper end side of the lower back plate 115 are connected.

  A rear end side of the side frame 116 that is curved so as to swell forward and upward in a side view along the shape of the rear fender 21 is connected to the middle part of each rear lower frame 113. Corresponding left and right rear fenders 21 are connected to each side frame 116. Corner cover plates 117 are disposed between the corner portions of the left and right side frames 116. The left and right end portions of the corner cover plate 117 are connected to the left and right inner surfaces of the corresponding side frames 116, respectively. A front cover plate 118 is disposed below the corner cover plate 117. The left and right end portions of the front cover plate 118 are respectively connected to the left and right inner surfaces of the vertically long side frame 116. On the left and right inner surfaces of the laterally long side portion of the side frame 116, front and rear seat support plates 119 are provided so as to project inward in the left-right direction. The rear end side of the seat support plate 119 is connected to the lower end side of the lower back plate 115. The front end side of the seat support plate 119 is connected to the upper end rear side of the corner cover plate 117.

  The components 112 to 119 of the seat frame body 109 are all made of metal (made of steel). As shown in FIGS. 9 and 10, the side frames 116 constituting the left and right side portions of the seat frame body 109 are formed in a concavo-convex shape by pressing. Similarly, the upper and lower rear plates 114 and 115, which are the rear portions of the seat frame body 109, are also formed into a concavo-convex shape by pressing. The left and right side frames 116 and the upper and lower rear plates 114 and 115 having a concavo-convex shape are connected via left and right rear lower frames 113. With this configuration, the section modulus of the left and right side frames 116 of the seat frame body 109 is increased, and the rigidity of the seat frame body 109 and thus the cabin frame 100 can be improved. A front and rear bottom frame as used in the prior art becomes unnecessary. Further, the upper and lower rear plates 114 and 115 of the seat frame body 109 are formed into a concavo-convex shape by pressing, and the left and right side frames 116 are connected to the upper and lower rear plates 114 and 115 via the left and right rear lower frames 113. Therefore, the section modulus of the seat frame body 109 as a whole can be further improved, and the seat frame body 109 alone can be configured as a structure. As a result, the rigidity of the entire cabin frame 100 is improved.

  Next, the air conditioning structure of the roof body 106 will be described with reference to FIGS. The roof body 106 attached to the upper end side of the cabin frame 100 includes an outer roof 131 that is an exterior and an inner roof 132 that constitutes the ceiling of the cabin 7. By covering the inner roof 132 and the front and rear, left and right beam bodies 103 to 105 with the outer roof 131 from above, the inside of the roof body 106 is configured to be hollow. Accordingly, the rear side of the outer roof 361 extends rearward from the left and right rear support columns and covers the rear beam body 104.

  An air conditioner 134 that manages the air conditioning in the cabin 7 is accommodated on the rear side in the roof body 106. The air conditioner 134 adjusts the air conditioning (room temperature) in the cabin 7 by heating using the cooling water of the engine 5 and cooling using a compressor, a condenser, an evaporator, and the like driven by the engine 5. The air conditioner 134 according to the embodiment is arranged so as to partially fit on the inner surface side (inside the opening) of the rear beam body 104 protruding rearward from the left and right rear column bodies 102, and the overall height of the cabin 7 is more than necessary. In addition, the air conditioner 134 is disposed in a space-saving manner. In the embodiment, the air conditioner 134 is supported by the rear beam body 104 and the reinforcing beam body 111 having a rectangular frame shape in plan view.

  At the left and right corners on the front surface of the air conditioner 134, a first air discharge port that opens forward and a second air discharge port (both not shown) that open left and right are formed. The left and right first air discharge ports are connected to the upstream side of a longitudinal first discharge duct 173 that guides conditioned air from the air conditioner 134. The downstream side of the first discharge duct 135 is connected to a defrosting outlet 136 provided at the front portion of the inner roof 132. The defrosting outlet 136 is provided with fins for changing and adjusting the amount and direction of conditioned air from the air conditioner 134.

  Moreover, the upstream side of the 2nd discharge duct 137 which guides the conditioned air from the air conditioner 134 is connected to the left and right second air discharge ports. The left and right second discharge ducts 137 are shorter than the first discharge duct 135 but extend forward. The downstream side of the second discharge duct 137 enters the lower side of the corresponding first discharge duct 135. The downstream side of the second discharge duct 137 is connected to a cooling / heating outlet 138 provided on the left and right sides of the inner roof 132. Similarly to the defrosting outlet 136, the air conditioning outlet 134 is provided with fins for changing and adjusting the air volume and direction of the conditioned air from the air conditioner 134. Therefore, a set of the first and second discharge ducts 135 and 137 is distributed and arranged in units of the left and right sides in the roof body 106.

  A partition plate 140 is disposed in the middle of the front and rear of the roof body 106 so as to straddle the upper sides of the first and second discharge ducts 135 and 137 on both the left and right sides. A sealing material 141 is attached on the partition plate 140 and the air conditioner 134 so as to form a substantially T-shaped flow passage in plan view toward the air conditioner 134. In a state where the outer roof 131 is covered on the inner roof 132, the sealing material 141 is in close contact with the inner surface side of the outer roof 131, and a substantially T-shaped flow passage in plan view is formed on the partition plate 140 inside the roof body 106. Is done. The flow passage constitutes a suction duct 142 for taking in outside air.

  The front and rear middle portions of the left and right side beam members 105 project outward in the left and right direction, and an outside air intake port 143 that allows the suction duct 142 to communicate with the outside is formed in the projecting portion. The left and right outward upstream opening sides of the suction duct 142 communicate with the left and right outside air intake ports 143, respectively. A louver-shaped ventilation frame 144 and a dust filter 145 (outside air filter) are attached to the outside air intake port 143. Therefore, in the embodiment shown in FIGS. 11 to 14, the left and right first and second discharge ducts 135 and 137 that discharge the conditioned air from the air conditioner 134 into the cabin 7, and a substantially T shape in plan view that takes in the outside air. The suction ducts 142 are arranged so as to be distributed up and down inside the roof body 106.

  On the other hand, in the vicinity of the center of the inner roof 132, an inside air intake 146 that connects the inside of the roof body 106 and the cabin 7 is formed. A lattice-shaped ventilation frame 147 is attached to the inside air intake port 146. A communication port 148 communicating with the inside air intake port 146 is opened at the T-shaped intersection of the suction duct 142 in the partition plate 140. An internal / external air switching shutter plate 150 that manually opens and closes the communication port 148 is disposed at the communication port 148 in the partition plate 140.

  When the inside / outside air switching shutter plate 150 is closed, the inside air intake port 146 and the communication port 148 are closed, and external air is guided from the left and right outside air intake ports 143 through the suction duct 142 by driving the air conditioner 134. When the inside / outside air switching shutter plate 150 is opened, the inside air intake port 146 and the communication port 148 are opened, and external air does not enter from the left and right outside air intake ports 143, and the air conditioner 134 is driven to drive the air from the inside air intake port 146. Air in the cabin 7 is guided into the conditioner 134. In the embodiment, the ratio of the outside air and the inside air guided to the air conditioner 134 is adjusted by the opening degree (opening / closing degree) of the inside / outside air switching shutter plate 150.

  As is clear from the above description and FIGS. 7, 8, and 11 to 14, in the work vehicle including the cabin 7 that covers the control seat 8 on the traveling machine body 2, the cabin frame constituting the framework of the cabin 7. Reference numeral 100 denotes a pair of left and right front strut bodies 101, a pair of left and right rear strut bodies 102, a front beam body 103 connecting between the upper end portions of the front strut bodies 101, and an upper end portion of the rear strut bodies 105. A rear beam body 104, and a side beam body 105 that connects upper ends of the front column body 101 and the rear column body 102 arranged in the front-rear direction, and the rear beam body 104 is connected to the both rear column bodies. 102, the air conditioner 103 is accommodated inside the rear beam body 104 so that the air conditioner 103 is placed inside the roof body 106 without increasing the overall height of the cabin 7. Can be placed Both can be avoided for example problem of limiting the forward view of the operator for accommodating the air conditioner 134 on the front side of the roof body 106. Further, since the air conditioner 134 is accommodated inside the rear beam body 104, the space of the air conditioner 134 can be saved.

  Further, since the rear beam body 104 is formed in a U-shaped cross section by pressing using a metal plate as a raw material, the rear beam body 104 is improved in rigidity without using a pipe material or the like. The weight of the beam body 104 can be reduced.

  As is clear from the above description and FIGS. 11 to 14, the cabin 7 that covers the control seat 8 on the traveling machine body 2 is provided. The cabin 7 includes a cabin frame 100 that constitutes a framework, and the cabin frame 100. In a work vehicle having a roof body 106 arranged on the upper end side, a discharge duct that houses an air conditioner 134 on the rear side of the roof body 106 and discharges conditioned air from the air conditioner 134 into the cabin 7. Since 135 and 137 are distributed and arranged on the left and right sides of the roof body 106, the air conditioner 134 is located rearward, and a space above the front portion of the cabin 7 can be widened. Therefore, the forward visibility of the cabin 7 can be improved. Since there is a space on the front side of the roof body 106, for example, it is easy to secure a place where a sunroof or the like is disposed.

  In addition, a suction duct 142 is disposed above the discharge ducts 135 and 137 in the roof body 106, and an outside air intake port 143 that allows the suction duct 142 to communicate with the outside is formed on both left and right sides of the roof body 106. In addition, since the outside air filter 145 is attached to each outside air intake port 143, the discharge duct and the suction duct can be arranged in two upper and lower stages to save space. The outside air filter can be arranged in a compact manner by effectively using the left and right sides of the roof body which is a dead space.

  As is clear from the above description and FIGS. 11 to 14, the cabin 7 that covers the control seat 8 on the traveling machine body 2 is provided. The cabin 7 includes a cabin frame 100 that constitutes a framework, and the cabin frame 100. In a work vehicle having a roof body 106 disposed on the upper end side, a discharge duct 135 that houses an air conditioner 134 in the roof body 106 and discharges conditioned air from the air conditioner 134 into the cabin 7. 137 and the suction duct 142 for taking in outside air are arranged in the upper and lower parts inside the roof body 106, so that the discharge ducts 135 and 137 and the suction duct 142 are arranged in two upper and lower stages. Space saving of the arrangement of the ducts 135, 137, and 142 in the body 106 can be achieved.

  As apparent from the above description and FIGS. 7 to 10, in the work vehicle including the cabin 7 that covers the control seat 8 on the traveling machine body 2, the control seat of the cabin frame 100 that constitutes the framework of the cabin 7. The left and right side portions 116 of the seat frame body 109 that supports the seat 8 are formed in a concavo-convex shape by pressing, so that the sectional modulus of the left and right side portions 116 of the seat frame body 109 increases, and the seat frame body 109 As a result, the rigidity of the cabin frame 100 can be improved. A pipe frame extending in the front-rear direction as in the prior art becomes unnecessary.

  Further, the back surface portions 114 and 115 of the seat frame body 109 are formed in a concavo-convex shape by press working, and the left and right side portions 116 are connected to the back surface portions 114 and 115, so that the seat frame body 109 as a whole The section modulus is increased, and the seat frame body 109 alone can be formed into a structure. As a result, the rigidity of the entire cabin frame 100 is improved.

  In addition, the structure of each part in this invention is not limited to embodiment of illustration, A various change is possible in the range which does not deviate from the meaning of this invention.

DESCRIPTION OF SYMBOLS 1 Tractor 2 Traveling machine body 7 Cabin 8 Control seat 100 Cabin frame 101 Front support body 102 Rear support body 103 Front beam body 104 Rear beam body 105 Side beam body 106 Roof body 109 Seat frame body 114 Upper back plate 115 Lower back plate 116 side Part frame 131 Outer roof 132 Inner roof 134 Air conditioner 135 First discharge duct 137 Second discharge duct 140 Partition plate 142 Suction duct 143 Outside air intake port 145 Dust removal filter

Claims (2)

In a tractor having a cabin covering a control seat on a traveling body,
The cabin frame that constitutes the framework of the cabin includes a pair of left and right front strut bodies, a pair of left and right rear strut bodies, a front beam body connecting between the upper ends of the front strut bodies, and the rear strut bodies. A rear beam body connecting between upper end portions, and a side beam body connecting between upper end portions of the front column body and the rear column body arranged in front and rear,
The rear beam body is formed in a U-shaped cross section and substantially U-shaped in a plan view in which the rear beam body protrudes rearward from the both rear strut bodies,
The inner surface side of the rear beam body is opened forward,
Between the left and right ends that extend forward in the rear beam body, a horizontally elongated reinforcing beam body is disposed,
The left and right end portions of the reinforcing beam body are connected to lower openings of the corresponding left and right end portions in the rear beam body,
The rear beam body and the reinforcing beam body are formed in a substantially rectangular frame shape in plan view,
An air conditioner is housed inside the rear beam body,
Tractor . Of the cabin frame, the left and right side portions of the seat frame body that supports the steering seat are formed in a concavo-convex shape,
Furthermore, the back portion of the seat frame body is formed in an uneven cross-sectional shape,
The back part is connected to the left and right side parts,
The tractor according to claim 1.

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