JPH04129706U - Front loader connection support device for agricultural tractors - Google Patents

Abstract

(57) [Summary] [Configuration] At the front and rear positions of the bonnet 2 of the agricultural tractor 1,
Attach the front and rear brackets 7 and 4, and install the front loader 8.
A side frame 12 is led out from the loader machine frame 11 to the front side, and the loader machine frame 11 is detachably connected to the rear bracket 4 by the rear connecting means 13, and the side frame 1
In the front loader connection and support device for an agricultural tractor, the front loader connection and support device for an agricultural tractor is configured by detachably connecting the tip end of 2 to the front bracket 7 with the front connection means 14, and the pair of connections in which the rear connection means 13 are shifted in the vertical direction. The loader machine frame 1 is
1 is non-swingably supported by the rear bracket 4, and the front end of the side frame 12 is supported by the front bracket 7 via the front connecting means 14, so that the load of the front loader 8 that is about to be applied to the front bracket 7 is reduced. Part of the rear bracket 4
Make sure to also make them bear the burden. [Effect] A reinforcing frame between the front and rear brackets 7 and 4 is not required.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a front loader connection and support device for an agricultural tractor.

0002

[Prior art]

As a conventional technology for front loader connection support devices for agricultural tractors, There is one disclosed in Japanese Patent No. 19717 (hereinafter referred to as "Prior Art 1"). As shown in FIG. A pair of left and right rear brackets 104 are attached to the main frame on both right sides, and the vehicle body 1 03 Front brackets 107 led out to the front of the front axle 106 are installed on both left and right sides of the front side. Installation, the pair of left and right lift arms 109 of the front loader 108 and the pair of left and right lift arms 109 A pair of left and right loader machine frames 11 supporting a lift cylinder 110 so as to be vertically swingable. 1, lead out the side frame 112 to the front side, and attach the loader machine frame 111 to the rear bracket. It can be detachably connected to the kit 104 by the rear connecting means 113, and The front end of the side frame 112 is connected to the front bracket 107 by the front connecting means 114. It can be connected detachably.

0003 According to this configuration, the front loader 1 is mounted on the front side of the vehicle body of the existing agricultural tractor 101. 08 can be installed, and plowing by a rotary towed to the rear of the vehicle body 103 is possible. In addition to the normal rear work of agricultural tractors such as pooping, the hood attached to the front of the vehicle body 103 The advantage of using the Front Loader 108 is that its scope of work can be expanded to include front-end work such as transportation work. There is.

0004 By the way, in this prior art 1, the loader machine frame 111 is used as the rear connecting means 113. The rear bracket 104 is opened forward using an ear shaft 115 that protrudes sideways. A bearing recess 116 is provided, and the shaft guide arm 1 is inserted forwardly from below the bearing recess 116. 17 has been derived. When attaching the front loader 108 to the agricultural tractor 101 If the tip of the lift arm 109 and the tip of the side frame 112 are The front loader 108 is installed on the ground, and the agricultural tractor is pointed towards it. 101 is moved forward, the bonnet 102 is inserted between both side frames 112, While guiding the ear shaft 115 on the shaft guide arm 117, guide it into the bearing recess 116. Then, while moving the agricultural tractor 101 further forward, the lift cylinder 110 is deflate, lift the tip of the side frame 112, and The leading end is aligned with the leading end of the front bracket 107, and these are connected to the front connecting means 11. Connect with 4.

[0005] When the front loader 108 is attached to the agricultural tractor 101, a large The entire load of the long-extending front loader 108 is borne by the front bracket 107. However, in this prior art 1, the loader machine frame 111 and the rear bracket 1 04 is simply connected by receiving the ear shaft 115 in the bearing recess 116. Therefore, part of the load of the front bracket 107 is transferred to the side frame 112. The load cannot be placed on the rear bracket 104 via the rear bracket 104. For this reason, this In the prior art 1, the front wheel 11 is placed between the front bracket 107 and the rear bracket 104. A reinforcing frame 119 is provided that passes through the inside of the Part of the load borne by the front bracket 107 is borne by the rear bracket 104. I'm letting you do it.

[0006]

[Problem that the idea aims to solve]

Conventional technology 1 has the following problem. The number of parts is large as the reinforcing frame 119 is required, and the front loader connection is The structure of the support device also becomes complicated.

[0007] Since the reinforcing frame 119 passes inside the front wheel 118, it is difficult to see from the driver's seat. The view of the ground near the front wheel 119 is obstructed by the reinforcement frame 119, and the ridges of agricultural work When the vehicle travels between miles, problems such as the front wheels 118 trampling crops occur.

[0008] Since the reinforcing frame 119 passes inside the front wheel 118, the reinforcing frame 119 119 and the front wheel 118, the steering angle of the front wheel 118 is limited, and the minimum turning radius becomes large, making it difficult to maneuver around.

[0009] Since the reinforcing frames 119 are located on both sides of the bonnet 102, the front When the rider 108 is installed, the bonnet 102 is inserted between both side frames 112. In order to avoid interference between the reinforcing frame 119 and the side frame 112, It is necessary to provide a wide interval between the side frames 112. Therefore, support A rear bracket 104 that supports the rear side of the side frame 112 is attached to the bonnet 102. The dimension that protrudes to the side becomes longer, and the attachment of the rear bracket 104 becomes longer The root portion will receive a larger moment, and the rear bracket 104 will Easy to damage.

0010 Since the shaft guide arm 117 is led out forward from the rear bracket 104, the bonnet When attaching and detaching the covers provided on both sides of the net 102, these shaft guide arms 117 and The reinforcing frame 119 gets in the way.

[0011] In addition, as another conventional technique, the one disclosed in Japanese Utility Model Publication No. 63-40527 ( (hereinafter referred to as "prior art 2"), which is based on the bonnet 1 as shown in FIG. The front loader 10 can be assembled with only a pair of brackets 121 attached to both rear sides of the front loader 10. 8, and there is nothing corresponding to the reinforcing frame 119 in FIG.

0012 However, in this case, a pair of brackets 12 located at the rear of the hood 120 In order to support the entire load of the front loader 108, which extends far forward, the The load placed on the bracket 121 is quite large, and due to strength requirements, the bracket 121 is The shape of the vehicle has become abnormally large, and the visibility of the ground near the front wheels from the driver's seat is reduced to a bracket. 121, and there is a problem similar to that of the prior art 1. Also, the connecting hand Since the stage 122 is composed of a pair of front and rear connecting parts 123 and 124, the bracket 1 21 becomes relatively long, and a problem similar to that of the prior art 1 arises. be.

[0013] This invention eliminates the need for a reinforcing frame and provides a front loader connection bracket. The challenge is to enable a compact structure.

[0014]

[Means to solve the problem]

The present invention, as illustrated in FIG. Attach a pair of left and right rear brackets 4 to the vehicle body 3 on both sides, and Attach the front brackets 7 that extend to the front of the front axle 6 on both sides, and A pair of left and right lift arms 9 and a pair of left and right lift cylinders 10 of the da8 are vertically swung. A side frame 12 is attached to the front side from a pair of left and right loader machine frames 11 that are freely supported. The loader frame 11 is attached to and detached from the rear bracket 4 using the rear connecting means 13. At the same time, the tip of the side frame 12 is connected to the front bracket. The front of the agricultural tractor is constructed by detachably connecting to the front connecting means 14 with the front connecting means 14. The troder connection and support device is characterized by the following configuration.

[0015] A pair of connecting portions 15 and 16 arranged with the rear connecting means 13 shifted in the vertical direction. The loader machine frame 11 is connected to the rear part through the pair of connecting parts 15 and 16. It is supported by the bracket 4 in a non-swingable manner, and the side is connected via the front connecting means 14. The tip of the frame 12 is supported by the front bracket 7. .

[0016]

[Effect]

The loader machine frame 1 is connected to the loader machine frame 1 via a pair of connecting parts 15 and 16 arranged vertically shifted. 1 is non-swingably supported by the rear bracket 4, and the side frame is connected via the front connecting part 14. Since the tip of the frame 12 is supported by the front bracket 7, Part of the load that is about to be applied to the front loader 8 makes the loader machine frame 11 unable to swing. The load is also borne by the supported rear bracket 4. For this reason, the front bracket 7 and the rear There is no need to interpose a reinforcing frame between the frame and the bracket 4. therefore , the number of parts is reduced by eliminating the need for a reinforcing frame, and the front loader connection support system is The structure of the station is also simplified.

[0017] Since there is no need for a reinforcing frame that passes inside the front wheel 17, the front wheel from the driver's seat The visibility of the ground near wheel 17 is good, making it easy to use the front wheel 17 to pick up crops when traveling between the ridges during agricultural work. Eliminates harmful effects such as being stepped on.

[0018] Since there is no need for a reinforcing frame that passes inside the front wheel 17, the reinforcing frame and There is no interference with the front wheels 17, there is no restriction on the steering angle of the front wheels 17, and the minimum turning angle is This prevents the diameter from increasing and allows for tight turning.

[0019] Since the reinforcing frames located on both sides of the bonnet 2 are not required, the front rotor When inserting the bonnet 2 between the side frames 12 when the rider 8 is installed, , interference between the reinforcing frame and the side frame 12 is eliminated, and the side frame 12 is There is no need for wide spacing. Therefore, the rear side of the side frame 12 The dimension in which the rear bracket 4 that supports Therefore, the moment received by the base of the rear bracket 4 is reduced accordingly. Therefore, the rear bracket 4 is less likely to be damaged.

[0020] A pair of connecting portions 15 and 16 are arranged such that the rear connecting means 13 is shifted in the vertical direction. With this configuration, the front and rear width of the rear bracket 4 to which this is attached can be relatively shortened. . Therefore, the front part of the rear bracket 4 does not protrude significantly to the front, and Since there is no reinforcing frame, there is no obstacle when attaching and detaching the cover 18.

[0021]

[Effect of the idea]

The loader machine frame is connected to the rear bracket via a pair of connecting parts that are staggered in the vertical direction. The end of the side frame is supported in a non-swiveling manner by the The front loader tries to hang on the front bracket because it is supported by the bracket. Part of the load is also borne by the rear bracket that supports the loader machine frame without swinging. It will be done. For this reason, a reinforcing frame is inserted between the front bracket and the rear bracket. There is no need to do so. Therefore, parts that do not require this reinforcing frame are The number of points is reduced, and the structure of the front loader connection support device is simplified.

[0022] There is no need for a reinforcing frame that passes inside the front wheels, so the front wheels can be attached from the driver's seat. The visibility of the nearby ground is good, and when driving between the ridges during farm work, the front wheels can trample crops, etc. The negative effects of this will be eliminated.

[0023] There is no need for a reinforcing frame that passes inside the front wheel, so the reinforcing frame and front wheel This eliminates interference with the front wheels, eliminates restrictions on the steering angle of the front wheels, and increases the minimum turning radius. It prevents the machine from turning over and allows for maneuverability.

[0024] Reinforcement frames located on both sides of the bonnet are no longer required, so the front row When installing the bonnet, the reinforcing frame is required to insert the bonnet between both side frames. There is no interference between the side frame and the side frame, and there is no need to widen the space between the side frames. There is no. Therefore, the rear bracket that supports the rear side of the side frame is The size of the large overhang on the side of the bonnet has also been shortened, and the rear bracket has been reduced accordingly. The moment applied to the base of the bracket is reduced, making it difficult to damage the rear bracket. stomach.

[0025] Since the rear connecting means is composed of a pair of connecting parts arranged vertically shifted, The front and back width of the rear bracket to which this is attached can be made relatively short. For this reason, the rear The front part of the bracket does not protrude significantly to the front, and there is no reinforcing frame. Therefore, there is no interference when attaching or detaching the cover.

[0026]

【Example】

Embodiments of the present invention will be described based on the drawings. FIG. 1 is a front side view of an agricultural tractor equipped with a front loader. Figure 2 shows the block This is an explanatory diagram of how the front loader is connected to the racket, and Figure 2 (A) shows the rear bracket. Figure 2 (B) is an explanatory diagram of the connection state of the loader machine frame to the front bracket. An explanatory diagram of the connected state of the frame tip, FIG. 2(C) is a sectional view taken along the line CC in FIG. 2(B) It is.

[0027] In FIG. 1, reference numeral 1 indicates an agricultural tractor. This agricultural tractor 1 is Attach the bonnet 2 that houses the engine (not shown) above the main frame 3. , with a driver's seat (not shown) located at the rear. Left and right side walls of bonnet 2 A cover 18 is detachably attached to the cover 18. There is a flap on the front side of this agricultural tractor 1. The front loader 8 can be detachably attached.

[0028] The front loader 8 is constructed as follows. As shown in Figure 2(A), The pair of loader machine frames 11 is constructed by connecting both side plates 28 with a back plate 29. Shown in Figure 1 The base end portions of the pair of left and right lift arms 9 and the pair of left and right lift arms 9 are attached to the loader machine frame 11 so as to The base ends of the lift cylinders 10 of the lift cylinders 10 are each pivotably supported to attach the lift door to the loader machine frame 11. The arm 9 and the lift cylinder 10 are supported so as to be vertically swingable. lift cylinder The distal end of the holder 10 is pivotally supported in the middle of the lift arm 9. Tip of lift arm 9 A bucket (not shown) is attached to the end so that it can swing up and down. Each loader machine frame 11? A side frame 12 is led out to the front side. The side frame 12 is the front The joints start from the tip of the frame body 19, which is in an almost horizontal state when the loader 8 is installed. It is constructed by vertically disposing a table 20. The joint stay 20 is attached to the frame body 19 It is attached by bolting through a long hole 42, and the attachment position can be adjusted. It is set as. For this reason, the insertion/extraction pin, the engagement pin 32, and the connection pin 41, which will be described later, are It is now possible to correct errors in relative position.

[0029] The front loader 8 is connected to the agricultural tractor 1 via a front loader connection support device. The connecting support device is composed of front and rear connecting support parts.

[0030] The rear connection support part is as follows. May be installed on both left and right sides of the rear of the bonnet 2. A pair of left and right rear brackets 4 are attached to the main frame 4. rear bracket 4, a boss 23 is provided on the front side of the upper part, and a locking pawl 24 facing forward and upward is provided on the front side of the lower part. It is set up. An upward locking recess 25 with an open upper side is provided at the base end of the locking claw 24. ing. On the front side of the middle part of the rear bracket 4, there is a vertical groove that is continuous with the upward locking recess 25. This forms a pin guide edge 26.

[0031] On the other hand, the loader frame 11 is provided with a rear connecting means 13. Rear connection means 13 is composed of a pair of connecting parts 15 and 16 arranged vertically offset. upper row A pull-out pin 27 is used for the connecting portion 15. As shown in Figure 2(A), the loader Opposing pin insertion holes 30 are formed in the center of both side plates 28 of the machine frame 11, and the pins are inserted through the holes 30. The insertion/extraction pin 27 can be inserted into the hole 30, and both A boss positioning plate 31 having a dogleg-shaped cross section is installed between the side plates 28. lower joint 16, an engagement pin 32 installed between the lower ends of both side plates 18 of the loader machine frame 11 is used. I'm there.

[0032] The connection of the loader machine frame 11 to the rear bracket 4 using the rear connection support section is as follows. Do it like this. The tip of the lift arm 9 of the front loader 8 and the joint stay The front loader 8 is installed on the ground with the tip of the front loader 20 being grounded. At this time As shown in FIG. 2(A), the loader frame 11 is tilted forward.

[0033] Now, move the agricultural tractor 1 forward and attach the bonnet 2 to the left and right side frames. 12, move the rear bracket 4 close to the loader machine frame 11, and 1 engagement pin 32 is brought into contact with the pin guide edge 26 of the rear bracket 4, and then When the foot cylinder 10 is retracted, the loader machine frame 11 gradually becomes vertical. , approaches the rear bracket 4. At this time, the engagement pin 32 is rotated as shown by the arrow 33. It fits into the upward locking recess 25 while being guided by the ring guide edge 26. Also, loader machine The center part of the frame 11 approaches the boss 23 as shown by the arrow 34, and the boss positioning plate 31 The pin insertion hole 30 is inserted into the boss 23, and the boss 23 is positioned. and match. Now, insert and remove the pins 27 into and out of the pin insertion holes 30 and bosses 23 in a series. Insert it and prevent it from coming out. According to this rear connection support part, the loader machine frame 11 is It is supported by the bracket 4 in a non-swingable manner.

[0034] The structure of the front connection support part is as follows. As shown in Figure 1, the main frame Front brakes extending to the front of the front axle 6 are provided on both left and right sides of the front frame 5 on the front side of the frame 44. Racket 7 is attached. The front bracket 7 has an opening 40 on the lower side. A downward locking recess 35 is provided. A lock block 3 is attached to the front bracket 7. 6 is attached. The base end of the lock block 36 is located on the lower front side of the front bracket 7. It is pivotally supported by a pivot pin 37 provided. Front bracket as shown in Figure 2(C) 7 is provided with a stopper 43. Lock block 36 closes opening 40 It comes into contact with the stopper 43 at this position, and rotation in the clockwise direction 39 is locked. ing.

[0035] On the other hand, as shown in FIG. 1(B), the joint stay 20 has a front connecting means 1. 4 is attached. This front connecting means 14 includes a distal end portion of a joint stay 20. A connecting pin 41 is used that projects laterally from.

[0036] The front end of the side frame 12 is connected to the front bracket 7 by this front connection support part. The conclusion is done as follows. As mentioned above, the lift cylinder 10 is retracted and lowered. When turning the machine frame 11 vertically, as shown in FIG. 2(B), the connecting pin 41 is The lock block moves upward, enters the downward locking recess 35 through its opening 40, and locks the lock block. 36 is pushed up to rotate it in the counterclockwise direction 38. The connecting pin 41 is facing downward. When the lock block 36 is fitted into the rear end of the locking recess 35, the lock block 36 can be manually or otherwise operated. , when rotated in the clockwise direction 39 to the position where the opening 40 is closed, as shown in FIG. 2(C). As shown, the lock block 36 is locked by contacting the stopper 43, and the connecting pin 41 will be supported from below.

[0037] The embodiments of the present invention are as described above, but the present invention is limited to the above embodiments. isn't it. For example, the rear bracket 4 cannot be attached to the main frame 44. Instead, it may be attached to the body part of the vehicle body 3. Also, the rear connecting means 13 is configured. The pair of connecting portions 15 and 16 may be vertically and diagonally shifted from each other.

[Brief explanation of drawings]

FIG. 1 is a front side view of an agricultural tractor equipped with a front loader.

[Fig. 2] Fig. 2 is an explanatory diagram of the state in which the front loader is connected to the bracket, Fig. 2 (A) is an explanatory diagram of the state in which the loader machine frame is connected to the rear bracket, and Fig. 2 (B) is an explanatory diagram of the state in which the loader machine frame is connected to the rear bracket. An explanatory diagram of the connected state of the end of the side frame, Figure 2
(C) is a sectional view taken along the line CC in FIG. 2(B).

FIG. 3 is a side view of prior art 1;

FIG. 4 is a side view of prior art 2. FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1... Agricultural tractor, 2... Bonnet, 3... Vehicle body, 4... Rear bracket, 6... Front axle, 7... Front bracket, 8...
Front loader, 9...Lift arm, 10...Lift cylinder, 11...Loader machine frame, 12...Side frame, 13
...Rear connecting means, 14... Front connecting means, 15/16... Connecting portion.

Claims (1)

[Scope of utility model registration request] [Claim 1] A pair of left and right rear brackets (4) are attached to the vehicle body (3) on both left and right sides of the rear of the bonnet (2) of the agricultural tractor (1).
Install the front axle (6) on both left and right sides of the front of the vehicle body (3) above.
A pair of left and right lift arms (9) and a pair of left and right lift cylinders (10) of the front loader (8) are supported vertically and swingably by attaching the front bracket (7) led out to the front of the front loader (8). A side frame (12) is led out from the loader machine frame (11) to the front side, and the loader machine frame (11) is removably connected to the rear bracket (4) by the rear connecting means (13), and In the front loader connection and support device for an agricultural tractor, the front loader connection and support device for an agricultural tractor is configured by detachably connecting the front end of the frame (12) to the front bracket (7) by the front connection means (14), wherein the rear connection means (13) The loader machine frame (11) is connected to the rear bracket ( 4), and the front end portion of the side frame (12) is supported by the front bracket (7) via the front connection means (14). Front loader connection support device.