JP7103317B2 - Work vehicle - Google Patents

Description

The present invention relates to a work vehicle such as an agricultural tractor, and more particularly to a configuration for suppressing vibration of a steering handle portion.

In an agricultural tractor, which is one of the work vehicles, the bonnet covering the engine room where auxiliary machinery such as the engine and radiator are arranged can be rotated around the support shaft provided in the lower front part of the vehicle body to open and close the engine room. There is a structure (Patent Document 1).

Japanese Unexamined Patent Publication No. 2011-207385

According to the configuration of Patent Document 1, the upper part of the engine room can be largely released and the maintainability is excellent. However, in this configuration, the bonnet is fixed by the lock mechanism provided at the rear upper part of the bonnet when the bonnet is closed. The vibration tends to be larger toward the rear side, and due to this, the vibration is transmitted to the steering handle portion, which deteriorates the ride comfort of the driver.

In view of the above, it is an object of the present invention to suppress the influence of bonnet vibration and improve the riding comfort.

The present invention has taken the following technical measures to solve the above problems.

The first invention provides a bonnet (10) that covers the engine room in which the engine (2) and the radiator (14) are arranged so as to be openable and closable, and supports a steering handle (6) that is steered and interlocked with the steering wheel (4). A steering bracket (29) is provided, a meter panel bracket (33) for supporting and fixing the meter panel (7) is provided above the steering bracket (29), and a radiator bracket (14) for supporting the radiator (14) in the engine room is provided. 27L, 27R) is provided, and a connector (34) for connecting the radiator bracket (27L, 27R) and the meter panel bracket (33) is provided.
The connecting tool (34) is a work vehicle characterized in that the left and right fixing portions are fixed to the left and right radiator brackets (27L, 27R), respectively, and the upper fixing portion is fixed to the meter panel bracket (33). ..
The second invention is the first working vehicle of the present invention in which the left and right cushioning materials (43L, 43R) that the bonnet (10) comes into contact with in the closed state are provided on the radiator bracket (27L, 27R).
According to the third aspect of the present invention, a locking member (10P) provided on the bonnet (10) side is locked in the vicinity of the upper fixing portion of the connecting tool (34) in a closed state of the bonnet (10). A lock mechanism (40) for locking the bonnet (10) is provided, and a notch (34 cN) through which the locking member (10P) can pass without interfering when the bonnet (10) is opened and closed is provided in the upper fixing portion. The first or second work vehicle of the present invention.
A fourth aspect of the present invention is the third work vehicle of the present invention provided with a spring (42) that displaces and biases the bonnet (10) upward when the lock mechanism (40) is unlocked.
In the first invention related to the present invention, a bonnet 10 covering the engine room in which the engine 2 and the radiator 14 are arranged is provided so as to be openable and closable, and a steering bracket 29 for supporting the steering handle 6 which is steered and interlocked with the steering wheel 4 is provided. A meter panel bracket 33 for supporting and fixing the meter panel 7 is provided on the upper portion of the steering bracket 29, radiator brackets 27L and 27R for supporting the radiator 14 in the engine room are provided, and the radiator brackets 27L and 27R and the meter panel bracket are provided. It is characterized in that a connecting tool 34 for connecting the 33 is provided.

In the second invention related to the present invention, in the first invention related to the present invention, the left and right cushioning materials 43L and 43R that abut the radiator brackets 27L and 27R in the closed state of the bonnet 10 are provided.

In the third invention related to the present invention, in the first or second invention related to the present invention, the connecting tool 34 is fixed to the left and right radiator brackets 27L and 27R with the left and right fixing portions, respectively, and the upper fixing portion. Was fixed to the meter panel bracket 33.

In the fourth invention related to the present invention, in the third invention related to the present invention, the locking member 10P provided on the bonnet 10 side is provided in the vicinity of the upper fixing portion of the connecting tool 34 in the bonnet 10 closed state. A locking mechanism 40 for locking the bonnet 10 by locking with the bonnet 10 is provided, and a notch portion 34cN through which the locking member 10P can pass without interfering with the bonnet 10 when the bonnet 10 is opened and closed is provided in the upper fixing portion.

In the fifth invention related to the present invention, in the fourth invention related to the present invention, a spring 42 for urging the bonnet 10 to be displaced upward when the lock mechanism 40 is unlocked is provided.

According to the present invention, the rigidity can be improved by connecting the radiator brackets 27L and 27R and the meter panel bracket 33, the vibration of the bonnet 10 generated by the engine 2 can be suppressed, and the vibration of the steering handle 6 can be reduced. The ride quality of the driver can be improved. Further, according to the present invention, in addition to the above-mentioned effects, the vibration transmitted from the steering bracket 29 to the meter panel bracket 33 tends to increase from the lower part to the upper part, but the meter panel bracket 33 is fixed by the connector 34. Increases the vibration suppression effect.
According to the first invention related to the present invention, the rigidity can be improved by connecting the radiator brackets 27L and 27R and the meter panel bracket 33, the vibration of the bonnet 10 generated by the engine 2 can be suppressed, and the steering handle. The vibration of 6 can be reduced, and the ride comfort of the driver can be improved.

According to the second invention related to the present invention, in addition to the effect of the first invention related to the present invention, the vibration of the bonnet 10 can be appropriately suppressed with the bonnet 10 closed.

According to the third invention related to the present invention, in addition to the effect of the first or second invention related to the present invention, the vibration transmitted from the steering bracket 29 to the meter panel bracket 33 tends to increase from the lower part to the upper part. However, the vibration suppression effect is enhanced by fixing the meter panel bracket 33 with the connector 34.

According to the fourth invention related to the present invention, in addition to the effect of the third invention related to the present invention, the locking member 10P can be configured not to interfere with the connector 43 when the bonnet 10 is opened and closed.

According to the fifth invention relating to the present invention, in addition to the effects of the fourth invention relating to the present invention . The bonnet 10 can be unlocked smoothly.

It is a side view of an agricultural tractor. It is a side view of the front part of a car body. It is a front perspective view of a part of the vehicle body with the engine etc. removed. It is a front perspective view which shows the structure around the connector. It is a rear perspective view of the steering bracket and its surroundings. It is a perspective view of a connector.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is an overall side view of a tractor according to the present invention. As shown in FIG. 1, the tractor according to the present invention constitutes an airframe by installing an engine 2 and a rear transmission case 3 on main frames 1L and 1R parallel to the left and right, and front and rear wheels 4L, 4R, 5L and 5R. The driving mode can be switched to rear-wheel drive or four-wheel drive, and front-wheel steering is possible. Further, the driving unit is provided with a steering handle 6, a meter panel 7, a seat 8 and the like for steering and interlocking the front wheels 4L and 4R, and a fuel tank 9 is installed below the seat 8. Further, the engine 2 is mounted in the bonnet 10 at the front part of the machine body, and the abdominal work machine 12 is arranged under the deck 11 of the driving part.

A radiator fan 13 and a radiator 14 are arranged at the rear portion of the engine 2, and the bonnet 10 is configured to be able to enclose an engine room in which auxiliary machinery such as the engine 2 and the radiator 14 are arranged.

The output shaft 15 of the engine 2 and the pump shaft 17 in the HST case 16 at the rear of the machine body are connected by a drive shaft 18 having universal joints at both ends. It is transmitted to the rear wheel 5 via.
Further, the front wheel 4 is supported on the front axle case 20 supported below the front portion of the main frames 1L and 1R. Then, an input shaft holding case 21 is provided diagonally backward and upward from the front axle case 20, and the input shaft holding case 21 supports the input shaft 22 diagonally backward and upward, and forward from the transmission case 3 arranged at the rear of the machine body. A precursor output shaft 23 projecting toward the direction is provided, and the input shaft 22 and the precursor output shaft 23 are connected by a universal joint shaft 24 having swing portions at both ends.
Further, the mid PTO shaft 25 protruding forward from the rear transmission case 3 of the machine body is connected to the drive shaft 26 of the work machine 12 to drive the work machine 12 mounted on the abdomen of the machine body, for example, the lawn mower by a universal joint. Has been done.

Next, the configuration of the battery mounting frame will be described. The figure is a side view of the inside of the bonnet. According to this, the radiator bracket 27 of the radiator 14 and the steering bracket 29 supporting the steering post 28 including the interlocking shaft of the steering handle 6 are connected to each other to provide the battery mounting base 30.

According to this configuration, the battery 31 can be arranged on the battery mount 30 that connects the radiator bracket 27 and the steering bracket 29, so that the battery in the upper part of the bonnet 10 can be easily maintained in an inexpensive configuration. 31 can be laid out.

The left and right sides of the radiator 14 are connected and supported to the radiator brackets 27L and 27R whose lower end side is connected and fixed to the main frames 1L and 1R, and the fan shroud 32 of the radiator fan 13 arranged between the radiator 14 and the engine 2 is provided. It supports the connection.

Then, the left and right radiator brackets 27L and 27R and the meter panel bracket 33 supporting the meter panel 7 are connected by a connecting tool 34. That is, in the meter panel bracket 33 formed in a plate shape having an inclined surface with an appropriate reinforcing rib configuration, the lower side of the inclined surface is fastened to the upper end side of the steering bracket 29 with bolts 36 and 36, but the upper end side of the inclined surface is fastened. The lower surface is connected and supported by the connecting tool 34. Specifically, the connecting tool 34 includes base brackets 34aL and 34aR that are detachably connected to the radiator brackets 27L and 27R, and a pair of left and right screw nuts 34bL and 34bR that screw the fastening bolts to the meter panel bracket 33. It consists of a connector 34c that connects these screw nuts 34bL and 34bR, and pipes 34dL and 34dR that connect the base brackets 34aL and 34aR and the screw nuts 34bL and 34bR on the left and right sides, respectively, and these are connected by means such as welding. It is configured in a U shape when viewed from the front.

Therefore, the connector 34 can connect and support the base brackets 34aL and 34aR directly to the upper ends of the radiator brackets 27L and 27R or via the relay members 35L and 35R in an inverted U-shaped standing posture to form a left and right fixing portion. ing. Then, a fastening bolt is screwed into the screw nuts 34bL and 34bR which are connected to each other by the connector 34c and are located at the upper position to form an upper fixing portion capable of fastening the meter panel bracket 33. As a result, by connecting the radiator bracket 27 and the meter panel bracket 33, the rigidity is improved in combination with the fastening of the bolts 36 and 36, and the vibration of the bonnet 10 caused by the engine 2 or the like can be suppressed, so that the steering handle 6 vibrates. It becomes difficult and the ride quality of the driver can be improved.

A locking mechanism 40 of the bonnet 10 is configured in the vicinity of the upper fixing portion of the connecting tool 34. The bonnet 10 has a configuration in which the lower front side can be rotated upward with the fulcrum P as the fulcrum P to open the bonnet 10 and the rear side can be rotated downward to return to the closed state of the bonnet 10. A lock mechanism 40 that can be held is provided. A locking member 10P such as a pin is provided on the inner surface of the upper rear portion of the bonnet 10, and a hook member 40a that receives and locks the locking member 10P, a lock spring 40b that urges the lock holding side, and a book member 40a are locked. It is composed of an operating tool 40c or the like that operates in an unlocked posture against 40b to unlock it.

A spring seat 41 is formed on one of the connecting pipes 34dR side of the connecting tool 34, and the spring 42 is arranged so that the bonnet 10 is displaced and urged upward when the lock mechanism 40 is unlocked. The work of lifting the bonnet 10 by the operator's hand can be facilitated. Further, the connector 34c constituting the upper fixing portion of the connector 34 is formed with a notch portion 34cN through which the locking member of the bonnet 10 can pass without interfering with each other when the bonnet 10 is opened and closed. When the notch portion 34cN is configured in this way, the connecting tool 34 can be provided so as not to hinder the opening / closing operation when opening / closing the bonnet 10.

In the vicinity of the base brackets 34aL and 34aR of the connector 34, cushioning materials 43L and 43R that come into contact with each other when the bonnet 10 is opened and closed are provided. Therefore, in order to suppress the vibration of the bonnet 10, the steering handle 6 is less likely to vibrate and the riding comfort can be improved. The cushioning materials 43L and 43R have a known configuration in which hard rubber is provided on the top of the column.

2 Engine 4 Steering wheels (front wheels)
6 Steering handle 7 Meter panel 10 Bonnet 10P Locking member 14 Radiator 27L Radiator bracket 27R Radiator bracket 29 Steering bracket 33 Meter panel bracket 34 Connector 34cN Notch 40 Lock mechanism 42 Spring 43L Cushioning material 43R Cushioning material

Claims (4)

A bonnet (10) that covers the engine room in which the engine (2) and the radiator (14) are arranged is provided so as to be openable and closable, and a steering bracket (29) that supports the steering handle (6) that is interlocked with the steering wheel (4) is provided. A meter panel bracket (33) for supporting and fixing the meter panel (7) is provided on the upper portion of the steering bracket (29), and radiator brackets (27L, 27R) for supporting the radiator (14) in the engine room are provided. A connector (34) for connecting the radiator brackets (27L, 27R) and the meter panel bracket (33) is provided .
A work vehicle characterized in that the connecting tool (34) is fixed to the left and right radiator brackets (27L, 27R) with left and right fixing portions, and is fixed to the meter panel bracket (33) with an upper fixing portion . The work vehicle according to claim 1 , wherein the radiator brackets (27L, 27R) are provided with left and right cushioning materials (43L, 43R) that the bonnet (10) comes into contact with in a closed state . The bonnet (10) is locked by locking the locking member (10P) provided on the bonnet (10) side in the vicinity of the upper fixing portion of the connecting tool (34) in the closed state of the bonnet (10). 2 . The work vehicle described. The work vehicle according to claim 3 , further comprising a spring (42) that displaces and biases the bonnet (10) upward when the lock mechanism (40) is unlocked.

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