JP4014986B2 - Tractor frame structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tractor reinforcing frame structure for mounting a front loader in the middle of a tractor vehicle body and a rear working machine such as a backhoe at the rear.
[0002]
[Prior art]
Some agricultural tractors and the like have detachable reinforcing frame structures attached to the left and right sides of the tractor body to increase the rigidity and strength of the body and to allow the work machine to be detachably connected in the front-rear direction. .
In this type of conventional reinforcing frame structure, a pair of left and right connecting bodies that connect the rear work machine is fixed to a rear axle case that protrudes left and right from the tractor body, and the left and right sides of the rear frame are fixed above the left and right connecting bodies. A frame receiving portion capable of holding the leg portion is provided, and the left and right leg portions and the frame receiving portion are detachably connected (for example, refer to Patent Document 1). And the said left-right connection body is mutually connected by the square pipe material.
[0003]
In another conventional reinforcing frame structure, at least the left and right side frame members extending along the longitudinal direction of the vehicle body on the left and right sides of the tractor body, and at least the front, rear, and midway parts of the left and right side frame members Equipped with a crossbar member that connects one place, a front connection mechanism that connects the front side to the front part of the tractor body, a rear connection mechanism that can connect the rear side to the rear part of the tractor body, and a front loader It has a loader mounting mechanism for enabling and / or a work machine mounting mechanism for enabling mounting of a post-work machine (for example, refer to Patent Document 2). And the rear support | pillar of the back frame is connected with the rear part of the reinforcement frame structure.
[0004]
[Patent Document 1]
JP-A-6-32188 (refer to claims)
[Patent Document 2]
Japanese Patent Laid-Open No. 10-7014 (refer to the claims)
[0005]
[Problems to be solved by the invention]
In both the above prior arts, the reinforcing frame structure is detachably fixed to the tractor vehicle body, and the rear frame (rops) is mounted on the reinforcing frame structure so as to stand upright. When it is necessary to form the attachment part of the reinforcing frame structure, and when you want to use only the tractor body when pulling out the reinforcing frame structure and pulling using the drawbar hitch, There are problems such as requiring a separate mounting tool for attaching the rear frame.
[0006]
It is an object of the present invention to provide a tractor reinforcing frame structure that can solve such problems of the prior art.
The present invention can attach a structure for reinforcing a tractor vehicle body and connecting a rear work machine without forming a mounting portion for a reinforcing frame structure on the tractor vehicle body. An object of the present invention is to provide a tractor reinforcing frame structure that can use a stand-up frame, a front loader, and the like even when detached.
[0007]
[Means for Solving the Problems]
Specific means for solving the problems in the present invention are as follows.
First, a pair of left and right rear support members 5 for supporting the left and right leg portions 13A of the rear frame 13 are provided on a rear axle case T8 projecting left and right from the tractor vehicle body T, and a front loader F is provided in the middle of the tractor vehicle body T. A pair of left and right loader mounting bodies 10 to be detachably mounted are provided, and a pair of left and right connecting bodies 7 for connecting the rear work machine B are fitted and arranged in the rear axle case T8 and detachably connected to the rear support body 5. The left and right connecting bodies 7 extend forward and are detachably connected to the loader mounting body 10.
[0008]
Thus, a structure such as the connecting body 7 for reinforcing the tractor vehicle body T and connecting the rear work machine B is mounted without forming the attachment portion of the reinforcing frame structure on the tractor vehicle body T. The rear frame 13 and the front loader F can be used even if the structure is detached.
Second, the rear support body 5 and the connection body 7 are connected to both the front and rear sides of the rear axle case T8.
Thereby, the connection strength between the rear support 5 and the connection body 7 can be increased.
[0009]
Third, between the rear axle case T8 and the rear support body 5, between the loader mounting body 10 and the connection body 7, and between the rear support body 5 and the connection body 7, at least one of them is interconnected. It is that the connection reinforcement tool 8 which reinforces is provided.
Thereby, mutual connection reinforcement of a connection part can be performed.
Fourthly, the connecting body 7 is located between the tractor vehicle body T and the rear support body 5 and is fitted with a fitting portion 7a that is open upward to the rear axle case T8 from below. A fitting portion reinforcing member 9 for connecting the front and rear portions of the fitted portion 7a on the upper side of the rear axle case T8 is provided.
[0010]
Accordingly, the connecting body 7 can be attached to and detached from the rear supporting body 5 without disassembling the rear supporting body 5 and the rear wheel T7, and the attaching and detaching work of the structure such as the connecting body 7 can be easily performed.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 5, reference numeral 1 denotes a tractor / front loader / backhoe (TLB). The tractor body T is reinforced by a pair of left and right reinforcing frames 2, and a front loader F is detachably mounted forward from a midway portion thereof. A backhoe B as a rear working machine is detachably attached to the rear part of T, and a mid-mount mower M can be attached to the lower part of the middle part of the tractor vehicle body T.
[0012]
The tractor vehicle body T includes a front body frame T6 that connects the engine T2, the clutch housing T4, and the transmission case T3 in the front-rear direction to form a vehicle body T4, and forwards the front axle case of the front wheel T5 from the engine T2. A rear axle case T8 that projects from the rear portion of the transmission case T3 and projects the rear wheel T7 to the left and right sides protrudes.
A work equipment elevating hydraulic device T10 is attached to the upper part of the transmission case T3, and a driver seat device 4 is mounted above the hydraulic device T10 so that the driver seat 3 can be reversed forward and backward. A floor sheet T11 is provided over the portion T14, and a fender T12 for the rear wheel T7 is attached to the left and right sides of the floor sheet T11.
[0013]
The left and right rear axle case T8 is detachably mounted with a pair of left and right rear support bodies 5 that support the left and right leg portions 13A of the rear frame (LOP) 13 via bolts. The rear frame 13 connects the left and right leg portions 13A with cross members, and the lower ends of the frame main body 13B in which the pipe is bent in a substantially U-shape on the left and right leg portions 13A can be folded via the bent portions 13C. They are connected and secure a living space for the driver seated in the driver's seat 3.
T13 is a bonnet that covers the engine T2, and the control portion T14 is provided at the rear thereof. A protector T15 for protecting the bonnet T13 is provided at the front end of the front axle frame T6.
[0014]
The front loader F pivotally supports the base of the boom F2 on the upper part of the left and right masts F1 so that it can swing up and down, pivots the bucket F3 on the tip of the boom F2 and pivots freely so that the boom F2 is supported by the boom cylinder F4, Each bucket F3 can be hydraulically driven by a bucket cylinder F5.
The mast F1 is configured to be fitted into the mast receiving member 10C of the loader mounting body 10 from the upper side, engage the lower portion, and lock the midway portion with a lock pin F6. When the front loader F is not used, the front loader F can be detached from the loader mounting body 10 by removing the lock pin F6.
[0015]
The mid-mount mower M is mounted on the lower part of the abdomen of the tractor vehicle body T via the suspension means M1, and is configured to rotate the blade by transmitting power from the transmission case T3. The mid-mount mower M can be detached from the tractor vehicle body T together with the suspension means M1 when performing loader work and / or backhoe work.
The backhoe B has a pair of left and right mounting bodies B2 on the front side of the base frame B1, and pivotally supports a swing bracket B3 at the rear of the base frame B1 so as to be swingable about the vertical axis. A steering device B4 that can be steered from the rear driver's seat 3 is mounted on the upper portion, and hydraulically driven outriggers (stabilizers) T16 are mounted on the left and right sides of the base frame B1.
[0016]
The swing bracket B3 can be swung left and right by a single swing cylinder B5. The base of the boom B6 and the boom cylinder B7 is pivotally supported by the swing bracket B3, and the boom B6 is swung up and down by the boom cylinder B7. The arm B8 is pivotally supported at the tip of the boom B6, and can be swung up and down by the arm cylinder B9. The bucket B10 is pivotally supported at the tip of the arm B8, and the bucket cylinder B11 can be scooped and dumped freely. .
The left and right mounting bodies B2 of the backhoe B are provided with engaging portions B14 and B15 in the vertical direction, and the vertical engaging portions B14 and B15 are attached to and detached from the left and right vertical connecting portions 11 and 12 at the rear end of the reinforcing frame 2. The back hoe B can be attached to and detached from the tractor vehicle body T.
[0017]
The upper engaging part B14 and the upper connecting part 11 are pin holes, the pins 14 are inserted concentrically facing each other, and the lower engaging part B15 is formed by a pin (connecting rod) extending left and right. The lower connecting portion 12 is formed in an upwardly open hook shape (concave portion). With the hook-like lower connecting portion 12 engaged with the pin of the lower engaging portion B15, the attachment body B2 is rotated to The pin 14 is inserted so that the joint portion B14 and the upper connecting portion 11 face each other.
Note that a pin may be provided on the upper connecting portion 11 and a mounting device that automatically engages the pin may be provided on the upper engaging portion B14. The lower connecting portion 12 is formed by welding a thick plate to the connecting body 7 described later, but may be integrally formed with the connecting body 7.
[0018]
1, 2, and 5, the mounting structure of the reinforcing frame 2 described above will be described in detail.
A pair of left and right rear support members 5 that support the left and right leg portions 13A of the rear frame 13 are provided on the rear axle case T8 that protrudes left and right from the tractor vehicle body T, and the front loader F is detachably attached to the front and rear middle portions of the tractor vehicle body T. A pair of left and right loader mounting bodies 10 to be mounted on the loader 10 are provided, and then a connecting body 7 is provided so as to connect the support body 5 and the loader mounting body 10.
The rear support 5 is formed by fixing the bottom plate 5A, which is fixed to the lower end of the leg portion 13A, and the back plate 5B, which is fixed to the lower back surface of the leg portion 13A, in a T shape, and is formed of an angle material from the lower portion of the back plate 5B to the front. The mounting plate 5C protrudes, and the fin plate 5D is fixed to the back plate 5B so as to protrude rearward, and a check chain connecting portion 5E is formed below the fin plate 5D.
[0019]
The rear support 5 has the bottom plate 5A placed on the rear axle case T8 and the back plate 5B applied from the back, and these are fixed with a plurality of bolts. Since the rear support is inclined, the rear support 5 is also attached to the rear inclined state.
The loader mounting body 10 has a mounting bracket 10B at the inner end of the sideways cylinder 10A on the tractor vehicle body T side, and has a substantially U-shaped mast receiving material 10C at the outer end. A connecting piece 10D is integrally projected downward from the receiving material 10C. The loader mounting body 10 is mounted on the tractor vehicle body T so as to protrude left and right by bolting the mounting bracket 10B to a mounting portion T16 formed on the tractor vehicle body T.
[0020]
Each of the left and right connecting bodies 7 for connecting the rear work machine B has a length reaching the loader mounting body 10 from the rear support body 5, and the vertical width of the front half is small. At the same time, it is connected to the mast receiving member 10C via a connection reinforcing tool 8F having a substantially L shape in plan view, and the connection between them is reinforced.
The rear portion of the connecting body 7 is formed with a large vertical width, and the upper and lower connecting portions 11 and 12 are formed on the upper and lower sides thereof, and are connected to the fin plate 5D of the rear support body 5 via a connecting reinforcing tool 8R. Yes.
[0021]
A fitting portion 7a that is open upward is formed in the vicinity of the rear portion of the connecting body 7, and the tractor vehicle body T and the rear support body in the left-right direction so that the fitting portion 7a is fitted to the rear axle case T8 from below. 5 is arranged.
In the state where the connecting body 7 is fitted to the rear axle case T8, the fitting portion reinforcing member 9 connects the front and rear portions of the fitting portion 7a on the upper side of the rear axle case T8 to form the fitting portion 7a. This prevents the strength from being reduced. The fitting portion reinforcing member 9 is formed so that the band plate is formed in an upwardly convex substantially U shape and does not interfere with the rear axle case T8.
[0022]
Further, the intermediate portion of the connecting body 7 is fastened by the mounting plate 5 </ b> C of the rear support 5 and the bolt 15. That is, the spacer 17 is interposed between the connecting body 7 and the mounting plate 5C, and the bolt 15 is passed through the connecting body 7, the mounting plate 5C and the spacer 17, and is tightened and fixed with a nut.
The connecting body 7 is bent in a U-shape at the front side of the connecting portion of the bolt 15 at the rear side of the connecting reinforcing tool 8F, and the front part is separated from the tractor vehicle body T and connected to the loader mounting body 10, and the rear part Is attached to the rear support 5 as it approaches the tractor body T.
[0023]
The total number of attachment points of the connecting body 7, the rear support body 5 and the loader mounting body 10 is 3. However, the bolt through holes are formed as fool holes or long holes so that the respective positions can be adjusted. It is preferable to keep it.
The connection of the structural bodies such as the connecting body 7, the sandwiching plate 16, and the connecting reinforcements 8 F and 8 R are all bolt-fastened and are detachable, and the rear support body 5 and the loader mounting body 10 are mounted on the tractor vehicle body T. In this state, each structure of the reinforcing frame 2 can be attached and detached, and each structure of the reinforcing frame 2 reinforces the tractor vehicle body T without being directly attached to the tractor vehicle body T.
[0024]
3 and 4 show an example in which an intermediate connection reinforcing tool 8C is provided. The intermediate connection reinforcing tool 8C has a connection bracket 19 and a support bracket 20, and the connection bracket 19 is provided on the lower surface of the rear axle case T8. The vertical plate 19b is fixed to the lower plate 19a to be bolted at a right angle, the support bracket 20 is a single flat plate, the vertical plate 19b of the connecting bracket 19 is bolted to the upper portion, and the lower portion is the side frame member. 6 and the connecting body 7 are fastened together by bolts 15 to them. A spacer 17 may be formed integrally with the lower portion of the support bracket 20.
[0025]
The intermediate connection reinforcing tool 8C is adjustable in position between the lower plate 19a and the rear axle case T8 and between the vertical plate 19b and the support bracket 20 in the front-rear direction, the left-right direction, and the upper-lower direction. The attachment strength of the rear support body 5 to the rear axle case T8 is increased, and the attachment strength of the connection body 7 to the rear support body 5 can be increased.
Accordingly, the connecting body 7 is connected to the rear support body 5 both before and after the rear axle case T8, and is firmly supported by the rear axle case T8. Can be improved.
[0026]
In the present invention, the shape of each member and the positional relationship of front / rear / left / right / up / down are best configured as shown in FIGS. However, it is not limited to the said embodiment, A member, a structure can be variously deformed, and a combination can also be changed.
For example, the connecting reinforcing member 8R is provided between the vicinity of the lower connecting portion 12 of the connecting body 7 and the fin plate 5D, and the intermediate connecting reinforcing member 8C is provided between the fitting portion reinforcing member 9 and the rear axle case T8. May be.
[0027]
Further, instead of providing the intermediate connection reinforcing tool 8C, the attachment plate 5C of the rear support 5 may be connected to the connection body 7 while being bolted to the rear axle case T8.
[0028]
【The invention's effect】
According to the present invention described in detail above, the structure body such as the connection body 7 for reinforcing the tractor vehicle body T and connecting the rear work machine B can be provided without forming the attachment portion of the structure body on the tractor vehicle body T. The rear frame 13 and the front loader F can be used even if the structure is detached.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of the present invention.
FIG. 2 is a plan view of the same.
FIG. 3 is a side view showing an example in which a connection reinforcing tool is provided.
FIG. 4 is a plan view of the same.
FIG. 5 is a schematic overall side view of a tractor / loader / backhoe.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tractor loader backhoe 2 Reinforcement frame 5 Rear support body 7 Connection body 7a Fitting part 8 Connection reinforcement tool 10 Loader mounting body 13 Rear frame 13A Leg part B Rear work machine F Front loader T Tractor vehicle body T8 Rear axle case

Claims (5)

A rear axle case (T8) projecting left and right from the tractor vehicle body (T) is provided with a pair of left and right rear support members (5) for supporting the left and right leg portions (13A) of the rear frame 13, and the middle of the tractor vehicle body (T). A pair of left and right loader mounting bodies (10) for detachably mounting the front loader (F) is provided on the part, and the pair of left and right connecting bodies (7) for connecting the rear work machine (B) are provided on the rear axle case (T8). It is fitted and detachably connected to the rear support body (5), and the left and right connection bodies (7) extend forward and are detachably connected to the loader mounting body (10) .
A reinforcing frame structure for a tractor, characterized in that a rear support body (5) and a connecting body (7) are connected both before and after the rear axle case (T8) . Between the rear axle case (T8) and the rear support body (5), between the loader mounting body (10) and the connection body (7), between the rear support body (5) and the connection body (7), The reinforcing frame structure for a tractor according to claim 1, wherein a connection reinforcing tool (8) that reinforces the interconnection is provided in at least one of the members. A rear axle case (T8) projecting left and right from the tractor vehicle body (T) is provided with a pair of left and right rear support members (5) for supporting the left and right leg portions (13A) of the rear frame 13, and the middle of the tractor vehicle body (T). A pair of left and right loader mounting bodies (10) for detachably mounting the front loader (F) is provided on the part, and the pair of left and right connecting bodies (7) for connecting the rear work machine (B) are provided on the rear axle case (T8). It is fitted and detachably connected to the rear support body (5), and the left and right connection bodies (7) extend forward and are detachably connected to the loader mounting body (10).
Between the rear axle case (T8) and the rear support body (5), between the loader mounting body (10) and the connection body (7 ) , between the rear support body (5) and the connection body (7), reinforcing frame structure of the characteristics and to belt Rakuta that the connecting brace (8) is provided for reinforcing at least one interconnected among.   The connecting body (7) is located between the tractor vehicle body (T) and the rear support body (5), and is fitted with a fitting portion (7a) that is open upward to the rear axle case (T8) from below. A fitting portion reinforcing member (9) for connecting the front and rear portions of the fitting portion (7a) fitted to the rear axle case (T8) on the upper side of the rear axle case (T8) is provided. A reinforced frame structure for a tractor according to any one of claims 1 to 3. A rear axle case (T8) projecting left and right from the tractor vehicle body (T) is provided with a pair of left and right rear support members (5) for supporting the left and right leg portions (13A) of the rear frame 13, and the middle of the tractor vehicle body (T). A pair of left and right loader mounting bodies (10) for detachably mounting the front loader (F) is provided on the part, and the pair of left and right connecting bodies (7) for connecting the rear work machine (B) are provided on the rear axle case (T8). It is fitted and detachably connected to the rear support body (5), and the left and right connection bodies (7) extend forward and are detachably connected to the loader mounting body (10).
The connecting body (7) is located between the tractor vehicle body (T) and the rear support body (5), and is fitted with a fitting portion (7a) that is open upward to the rear axle case (T8) from below. A fitting portion reinforcing member (9) for connecting the front and rear portions of the fitting portion (7a) fitted to the rear axle case (T8) on the upper side of the rear axle case (T8) is provided. Tractor reinforcement frame structure.

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