JP4520909B2 - Mower - Google Patents

Description

  According to the present invention, a mowing device is connected to a front portion of a self-propelled vehicle body through an elevating link that is swingable up and down so as to be movable up and down. Mowing supported so as to be switchable between an ascending mounting posture in which the bottom side of the device faces the front of the vehicle body and a descending mounting posture in which the bottom surface side of the mowing device turns downward with respect to the lifting link Related to the machine.

Conventionally, as the mower, there is a conventional one shown in Patent Document 1, for example.
With what is shown by patent document 1, while connecting the mower M as a mowing apparatus to the traveling body via the raising / lowering link 9, the lift arm 11 connected to the raising / lowering link 9 via the hanging rod 12, A lifting rod 9 and a connecting rod 21 connected to the rear part of the mowing blade housing 6 of the mower M are provided. The lifting arm 11 swings the lifting link 9 up and down to move the mower M up and down. When the hoisting link 9 is raised to lift the mower M and the connection between the cutting blade housing 6 and the hoisting link 9 by the hanging rod 12 is removed, the mower M is mowing by moving up and reversing around the fulcrum X3. The maintenance posture (corresponding to the ascending attachment posture) is such that the bottom surface of the blade housing 6 is exposed forward.

  In other words, this type of mower can be used to clean and check the mowing device by switching the mowing device to the ascending mounting position, while keeping the mowing device connected to the lifting link, with the bottom side of the mowing device facing the front of the vehicle body. Is something that can be done.

JP-A-8-256556 (paragraphs [0014]-[0016], FIGS. 1 and 3)

  In this type of mower, if the mowing device is supported as close as possible to the self-propelled vehicle body, the length that the mowing device protrudes forward from the self-propelled vehicle body is shortened, and the longitudinal length of the entire mower is shortened. Etc. are advantageous. In this case, when the mowing device is switched to the ascending mounting posture, especially when the operation force for raising and turning the mowing device is applied by the ammunition machine and the light mowing device can be lifted up lightly, the mowing device rises vigorously and self-propelled. A situation where the vehicle hits the vehicle is likely to occur.

  The object of the present invention is to switch the mowing device to the ascending mounting posture without causing a trouble to hit the self-propelled vehicle body even when the mowing device is connected to the self-propelled vehicle body as much as possible, and to obtain a simple structure. It is to provide a mower that can.

According to the first aspect of the present invention, a mowing device is connected to the front portion of the self-propelled vehicle body via an elevating link that can swing up and down so that the elevating operation can be performed. switching and increase mounting posture bottom side of the pivot to the mowing device becomes the front of the vehicle body facing to the downward mounting posture bottom side of the mowing device is lowered pivoted relative to the lift link becomes the vehicle body downward direction In a mower supported freely,
The front bumper of the self-propelled vehicle body is provided with a stopper portion that acts to receive and act on the mowing device that has been rotated upward on the front side of the self-propelled vehicle body ,
The front bumper is made of a bar material so as to include a pair of left and right vehicle body vertical bars and a vehicle body horizontal bar that connects the pair of left and right vehicle vertical bars, and the mowing device is turned up and down. In the state, the front bumper is arranged so that an attachment member of the mowing apparatus enters between the pair of left and right body vertical bars .

  In other words, even if the mowing device that tries to switch to the ascending installation posture rises vigorously and the mowing device hits the self-propelled vehicle body without the front bumper stopper, the mowing device hits the front bumper stopper and supports it. It does not hit the self-propelled vehicle body.

  Therefore, according to the first aspect of the invention, even when the mowing device is supported as close as possible to the self-propelled vehicle body, the mowing device is switched to the ascending mounting posture so as not to hit the self-propelled vehicle body, and the mowing device hits the vehicle body. Thus, it is possible to easily perform operations such as cleaning and inspection of the mowing device while avoiding deformation and damage. In addition, a simple structure using the front bumper as a guard means is sufficient, and it can be obtained at low cost.

In addition , the contact between the mowing device and the front bumper stopper prevents the mowing device from hitting the self-propelled vehicle body. The attachment posture in which the bottom side of the mowing device is more forwardly directed as much as it enters between the downward bars can be set as the rising attachment posture of the mowing device.

Therefore, according to the first aspect of the present invention, when the front bumper is used as a guard means for avoiding the hitting of the mowing device against the self-propelled vehicle body, the bottom side of the mowing device is more upward when the mowing device is switched to the upward mounting posture. This makes it easier to clean and check the mowing apparatus.

According to the second aspect of the invention, in the configuration of the first aspect of the invention, the front bumper is provided with a work lamp support portion.

  In other words, the work lamp is equipped using the front bumper as a support means.

Therefore, according to the second invention, the work lamp can be used to facilitate the work, and the front bumper can be used as a support means for the work lamp to obtain an advantage in terms of structure and economy. Can do.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 and 2, a pair of left and right driveable front wheels 1, a pair of left and right drive and steerable rear wheels 2, a prime mover equipped with an engine 3 provided at the rear of the vehicle body, and this prime mover The front part which comprises the vehicle body frame in the front part of the self-propelled vehicle body provided with the driving | running | working part equipped with the driver's seat 4 arrange | positioned near the vehicle body front side, and the lops 6 located near the rear side of the driver's seat The mowing device 10 is connected via a link mechanism 20 extending forward from the transmission case 7 to the vehicle body, and the driving force from the engine 3 is rotated from the power take-off shaft 7a located in the front transmission case 7 to the rotating shaft. The riding mower is configured to be transmitted to the mowing device 10 through 9.

  This mower performs mowing and lawn mowing work. When the pair of left and right lift arms 21 of the link mechanism 20 are swung up and down, the link mechanism 20 moves up and down with respect to the front mission case 7. The mowing apparatus 10 is moved up and down by swinging operation into a descending work state in which the ground gauge wheel 11 is grounded on the ground and a non-working state in which the ground gauge wheel 11 is lifted from the ground. When the grass cutting device 10 is moved down and the self-propelled vehicle body is driven, the grass cutting device 10 is driven and rotated around the axis of the vehicle body in the vertical direction at a plurality of locations in the lateral direction of the vehicle body inside the cutting blade housing 12. The blade-shaped rotary mowing blade 13 cuts grass and turf, and the mowing grass and mowing turf are positioned inside the mowing blade housing 12 on the lateral end side of the mowing blade housing 12 by the wind generated by the rotation of the rotary mowing blade 13. It is conveyed to the discharge port 12b to be discharged, and discharged from the discharge port 12b to the outside of the cutting blade housing.

  As shown in FIGS. 1 and 3, the link mechanism 20 includes an elevating link 22 extending from both lateral sides of the lower portion of the front mission case 7 so as to swing up and down toward the front of the vehicle body, and the front mission. The lift arm 21 supported on both lateral sides of the upper part of the case 7 so as to be swingable up and down, the lift rod 23 connecting the tip of the lift arm 21 and the intermediate part of the lift link 22 on the left side of the vehicle body, On the right side, a lift rod 23 connecting the tip of the lift arm 21 and the intermediate part of the lift link 22 is provided.

  Each of the lift arms 21 is located in the upper part of the front mission case 7 via a rotation support shaft 21b that rotatably connects the bases of the left and right lift arms 21 to the front mission case 7. It is linked to. The tip of each lifting link 22 is connected to a connection bracket 16 positioned on the upper surface side of the cutting blade housing 12 of the mowing device 10 so as to be relatively rotatable around an axis P1 that faces the vehicle body. Each connection bracket 16 is fixed to a connection frame 15 fixed to the upper surface side of the cutting blade housing 12 via a pair of left and right connection plates 14. A posture regulating rod 25 is connected to a middle portion of each lifting link 22 and a bracket 17 fixed to the upper surface side of the rear portion of the cutting blade housing 12 of the mowing apparatus 10.

  As shown in FIG. 5, both the lower end side of the posture regulating rod 25 connected to the left lifting link 22 and the lower end side of the posture regulating rod 25 connected to the right lifting link 22 A connecting pin 31 slidably supported by a pin holder 30 fixed to the posture regulating rod 25, and a connecting spring 32 slidably biasing the connecting pin 31 so as to be inserted into the bracket 17 of the cutting blade housing 12. An artificial operation portion 33 provided at the end of the connection pin 31 is provided so that the connection pin 31 can be slid against the connection spring 32 and removed from the bracket 17.

  That is, each posture regulating rod 25 is connected to the rear side of the cutting blade housing 12 by inserting or removing the connecting pin 31 with respect to the bracket 17 of the cutting blade housing 12 or removed from the rear side of the cutting blade housing 12. When the connection to the lifting link 22 by the posture regulating rod 25 on the rear side of the cutting blade housing 12 is released, the mowing device 10 is moved to the lifting link 22 around the axis P1. On the other hand, it can be turned up and down.

  That is, when the lifting link 22 is lifted and each posture regulating rod 25 is removed from the bracket 17 of the cutting blade housing 12, the mowing device 10 rotates up and down with respect to the lifting link 22 around the axis P1. As shown in FIG. 6, when the mowing apparatus 10 is turned up and down with respect to the lifting link 22, the mowing apparatus 10 is provided with an obstacle climbing roller located on the rear side of the cutting blade housing 12. 18 becomes a grounding member and stands on the ground, and the bottom mounting side of the mowing apparatus 10 where the opening 12a of the cutting blade housing 12 is present is in the ascending mounting posture with the vehicle body facing forward. As shown in FIG. 4, when the mowing apparatus 10 is rotated downward with respect to the lifting link 22, the mowing apparatus 10 has the cutting blade housing 12 hanging from the lifting link 22, and the opening 12 a of the cutting blade housing 12 exists. The lower mowing device 10 is in the lowered mounting posture with the bottom side facing the vehicle body downward.

  As shown in FIGS. 3, 7, and 10, a support link 40 in which an intermediate portion is supported on a bracket 19 included in the connection frame 15 via a connection pin 40 b is provided in the mowing apparatus 10, and a lower end portion of the support link 40 and A gas spring 41 is connected to a bracket 22 a fixed to the one lifting link 22.

  The gas spring 41 includes a cylinder tube 41a whose one end is rotatably supported by the bracket 22a of the elevating link 22, a cylinder rod 41b whose one end is rotatably supported by the support link 40, and an interior of the cylinder tube 41a. A gas (not shown) sealed in is provided.

The cylinder rod 41b is fitted in the cylinder tube 41a so as to slide out and retract. As the cylinder rod 41b is shortened so that the cylinder rod 41b enters the cylinder tube 41a, the gas in the cylinder tube slides and urges the cylinder rod 41b to protrude from the cylinder tube 41a. It is enclosed.
Accordingly, when the gas spring 41 is shortened so that the cylinder rod 41b enters the cylinder tube 41a, the gas spring 41 is elastically deformed along with this, and the cylinder rod 41b slides to the side protruding from the cylinder tube 41a. Accumulate elastic restoring force to urge.

  The support link 40 is an axis of the connecting pin 40b, and rotates around the axis that is the same or substantially the same as the axis P1 in which the distal ends of the left and right lifting links 22 rotate with respect to the bracket 16. The bracket 19 is supported so as to move. As shown in FIG. 7, pin holes 42 and 43 are provided in the support link 40 and the bracket 19, and when the lock pins 44 are attached to both the pin holes 42 and 43 as shown in FIG. When the lock pin 44 is removed from both the pin holes 42 and 43 as shown in FIG. Is configured to switch to a freely rotating state that freely rotates about the axis P1 with respect to the connecting frame 15 of the mowing apparatus 10.

If the support link 40 is switched to the unrotatable state in a state where the mowing apparatus 10 is in the lowered mounting posture with respect to the lift link 22, the support link 40 shortens the gas spring 41 and the gas spring 41 When the elastic restoring force is transmitted to the bracket 19 via the support link 40 and the lock pin 44, the gas spring 41 switches the accumulated elastic restoring force to the mowing device 10 in the ascending mounting posture. As an operation force in the direction, the state is switched to a state where the elasticity is applied to the connection frame 15 of the mowing device 10 via the support link 40 and the lock pin 44.
Even if the mowing apparatus 10 is in the lowered mounting posture with respect to the lifting link 22, even if the gas spring 41 exerts an elastic restoring force when the support link 40 is switched to the free rotation state, this elasticity When the support link 40 is rotated by the restoring force, the gas spring 41 is switched to the action release state in which the operation force applied to the mowing apparatus 10 is released.

  As shown in FIG. 7, the support link 40 is configured to be operated by connecting a detachable bar handle 45 to a handle connecting portion 40 a provided on the upper end side of the support link 40. The bar handle 45 is made of a square pipe material, and one end side of the bar handle 45 is externally fitted to the handle connecting portion 40a of the support link 40 so as to swing around the rotation axis of the support link 40. As a result, the support link 40 can be swung so that the support link 40 swings together with the bar handle 45 to the unrotatable position, and the support link 40 shortens the gas spring 41. It is like that.

  As shown in FIG. 3, a lock mechanism 50 including a lock pin 51 is provided above the horizontal end of the mowing blade housing 12 of the mowing apparatus 10.

  As clearly shown in FIG. 9, the lock mechanism 50 includes the lock pin 51 slidably supported by a pin holder 52, which is fixed to the side surface of the bracket 16 of the connecting frame 15, and the lock pin 51. A lock spring 53 is mounted, and a pin hole 54 is provided at the tip of the elevating link 22 connected to the bracket 16.

  The lock pin 51 and the pin hole 54 allow the lock pin 51 to enter the pin hole 54 when the mowing device 10 is turned up and down with respect to the lift link 22 to be in the lift attachment posture. It is arranged so as to be in a proper alignment state. The lock spring 53 slidably urges the lock pin 51 to the side where the lock pin 51 is inserted into the pin hole 54 by pressing against a spring receiving body 51 a included in the lock pin 51.

  Thereby, when the mowing apparatus 10 is operated to be lifted and rotated with respect to the lifting link 22 and the lifting mechanism 22 is in the rising mounting posture, the lock mechanism 50 is inserted into the pin hole 54 by the lock spring 53 along with this. The bracket 16 is fixed to the elevating link 22 by the lock pin 51 so as not to rotate, so that the lock spring 51 is automatically switched to the locked state in which the mowing apparatus 10 is fixed in the ascending mounting posture. The lock mechanism 50 is mowing by removing the lock pin 51 from the pin hole 54 by sliding the lock pin 51 against the lock spring 53 by the operation portion 55 provided at the end protruding from the pin holder 52 of the lock pin 51. It is possible to switch to the unlocked state in which the device 10 is released from being fixed to the raised mounting posture.

A front bumper 70 is provided at the front of the self-propelled vehicle body.
As shown in FIG. 11, the front bumper 70 includes a vehicle body vertical bar 71 passing through the vehicle body front side of each of the pair of left and right footrests 65 of the driving unit in the vehicle body vertical direction, and the pair of left and right vehicle bodies. Constructed by a round steel pipe as a bar material that is bent and formed so as to have a vehicle body sideways bar portion 72 that connects the upper end side of the vertically oriented bar portion 71 and that passes through the vehicle body front side of the control tower 66 of the driving unit. It is. As shown in FIG. 6, the front bumper 70 has the left and right pair of left and right free ends on which the handle connecting portion 40 a of the support link 40 is located in a state where the mowing apparatus 10 is switched to the ascending mounting posture. It arrange | positions so that it may enter between the vehicle body up-down direction bar parts 71. FIG.

  A stopper portion 73 for the mowing device 10 is provided on the left and right vehicle body vertical bars 71 of the front bumper 70. As shown in FIG. 6, the stopper portions 73 of the front bumper 70 are configured so that the footrest of the self-propelled vehicle body is moved when the mowing device 10 that is operated to be lifted from the lowered mounting posture slightly rises beyond the rising mounting posture. The driving force of the rotary shaft 9 is applied to the connection frame 15 of the mowing device 10 and the upper surface side of the cutting blade housing 12 in contact with the connection frame 15 of the mowing device 10 on the front side of the vehicle body from the stand 65 and the control tower 66. The input case 12b provided to be introduced is received by the mowing device 10 so as not to hit the footrest 65 or the control tower 66.

That is, when performing mowing or lawn mowing work, the lifting cylinder 24 is operated with the mowing device 10 in a state where the rear end side of the cutting blade housing 12 is connected to the left and right lifting links 22 by the pair of posture regulating rods 25. To do. Then, the lift cylinder 24 integrally swings the left and right lift arms 21 up and down, the left lift arm 21 via the lift rod 23 moves the left lift link 22, and the right lift arm 21 lifts the lift rod 23. The right elevating link 22 is driven to swing up and down through the upper and lower ends of each elevating link 22 so as to move up and down on the connecting frame 15 of the mowing apparatus 10. Thereby, the mowing apparatus 10 descends to the descending work state or ascends and descends to the ascending non-working state. At this time, the intermediate portion of each lifting link 22 supports and acts on the rear side of the cutting blade housing 12 via the attitude regulating rod 25, so that the mowing device 10 has a bottom surface side where the opening 12 a of the cutting blade housing 12 exists on the vehicle body. The work is moved up and down between a lowered working state and a raised non-working state in a state where the connection posture for work that is directed downward is maintained.
At this time, the support link 40 is switched to a freely rotating state. Then, the gas spring 41 is released from the action, and when the gauge wheel 11 and the roller 18 enter the concave portion on the ground or climb on the convex portion, the mowing device 10 swings up and down around the axis P1.

  When performing the work of cleaning and inspecting the inside of the cutting blade housing 12 of the mowing apparatus 10, as shown in FIG. 7 (a), the elevating link 22 is moved down so that the bottom face side of the mowing apparatus 10 is below the vehicle body. It is supported by the elevating link 22 in the lowered mounting posture and is in a state of being grounded on the ground by the gauge ring 11. Next, as shown in FIG. 7B, the bar handle 45 connected to the support link 41 is swung, and the gas spring 41 is shortened to store the elastic restoring force in the gas spring 41 and the support link 40. The lock pin 44 is attached to the support link 40 so that the support link 40 cannot be rotated, and the gas spring 41 is switched to the elastic state. Thereafter, as shown in FIG. 8, the lifting link 22 is lifted to lift the connection frame 15 of the mowing apparatus 10. At this time, the pair of posture regulating rods 25 are removed from the bracket 17 of the cutting blade housing 12 so that the connection between the rear side of the cutting blade housing 12 and the lifting link 22 is released, and the mowing device 10 When the connecting frame 15 is lifted, the mowing device 10 is rotated so as to rotate upward with respect to the lifting link 22 around the axis P1, and the cutting blade housing 12 is on the ground with the roller 18 as a grounding member. Stand in a raised position. At this time, the gas spring 41 exerts an elastic restoring force, and this elastic restoring force is applied to the mowing device 10 via the support link 40 as an operation force in a direction to switch the mowing device 10 to the ascending mounting posture. Thereby, for the assistance operation by the gas spring 41, the mowing apparatus 10 can be easily rotated to the ascending mounting posture. When the mowing apparatus 10 is in the ascending mounting posture, the opening 12a of the cutting blade housing 12 of the mowing apparatus 10 faces the front of the vehicle body, and operations such as cleaning and inspection inside the cutting blade housing 12 can be easily performed from the front side of the vehicle body. When the mowing apparatus 10 is in the ascending mounting posture, the lock pin 51 of the lock mechanism 50 is inserted into the pin hole 54 of the lift link 22 by the lock spring 53, and the lock mechanism 50 is automatically switched to the locked state. The work can be performed while the lock mechanism 50 is fixed in the raised mounting posture so that the posture is not changed from the raised mounting posture due to vibration or weight.

  When the mowing device 10 is switched to the ascending mounting posture, the mowing device 10 may be lifted vigorously due to an operation by the gas spring 41, and so on, and the locking pin 51 may not be hooked and the ascending mounting posture may be raised too much. Even if it exists, the said stopper part 73 of the front bumper 70 contact | abuts on the connection flame | frame 15 of the mowing apparatus 10, and it receives it, and it is avoided by this that the mowing apparatus 10 hits the footrest stand 5 and the control tower 66 of a driving | operation part. The

  As shown in FIG. 3, a storage portion 60 for the bar handle 45 removed from the support link 40 is provided near the connection frame 15 on the upper surface side of the cutting blade housing 12 of the mowing device 10.

  As clearly shown in FIG. 10, the storage unit 60 includes a locking piece 61 fixed to the bracket 19 of the connection frame 15 and a catcher 62 supported by the connection frame 15.

  In other words, the storage unit 60 connects the handle bar 45 by fitting one end of the bar handle 45 to the locking piece 61 and locking it, and fitting the intermediate part of the bar handle 45 into the catcher 62 and holding it. Between the brackets 19 and 16 of the frame 15, the storage posture along the connecting frame 15 is stored.

  As shown in FIGS. 6 and 11, the front bumper 70 will be described in more detail. The connecting rod portions extending in the vehicle longitudinal direction extending from the lower end portion of the vehicle body vertical rod portion 71 toward the vehicle body rearward at both ends of the front bumper 70. 74 is provided. The left and right connecting rod portions 74 are supported by the front mission case 7 via the support frame 7b connected to the front portion of the front mission case 7 below the footrest 65 of the driving unit. A front bumper 70 is supported on the self-propelled vehicle body.

  As shown in FIGS. 6 and 11, brackets are provided at both end portions of the vehicle body lateral bar portion 72 of the front bumper 70 to provide support portions 75, and work lamps 80 are supported by the support portions 75.

  As shown in FIG. 12, an opening 66a through which a tilt mechanism 68 for changing the mounting angle of the steering wheel 67 is provided on the rear surface side of the upper portion of the control tower 66, so that the size of the control tower 66 in the longitudinal direction of the vehicle body is provided. Can be made as small as possible. An instrument 69 such as a fuel gauge is provided on both sides of the tilt mechanism 68 of the control tower 66. That is, a wide space between the driver's seat 4 and the control tower 66 can be secured.

[Another Example]
When the mowing apparatus 10 is switched to the ascending mounting posture, the input case 12c is configured to enter between the left and right vehicle body vertical bars 71 of the front bumper 70 instead of the support link 40, and the support link 40 is also configured. The input case 12c may also be configured to be inserted between the left and right vehicle body vertical bars 71 of the front bumper 70. Therefore, the support link 40, the input case 12bc, and the like are collectively referred to as the attachment member 40 of the mowing apparatus 10.

Side view of the entire riding mower Top view of the entire riding mower Top view of mowing equipment Side view of mowing device Cross-sectional view of the attachment / detachment structure of the attitude control rod Side view of the mowing device in the upward rotation state (A) is a side view when the action of the ammunition is released. Side view showing how to lift the mowing device Cross section of locking mechanism Top view of storage Front bumper front view Side view of steering wheel arrangement Plan view of the instrument placement section of the control tower

DESCRIPTION OF SYMBOLS 10 Mowing apparatus 22 Elevating link 40 Attached member 70 Front bumper 71 Front bumper vehicle body vertical bar portion 72 Front bumper vehicle body horizontal rod portion 73 Stopper portion 75 Support portion 80 Work light

Claims (2)

The mowing device is connected to the front part of the self-propelled vehicle body so that it can be moved up and down via a vertically movable swing link.
It said mowing device, and increase mounting posture bottom side of the mowing device becomes the front of the vehicle body facing to pivotally raised relative to the lift link, a bottom side of the mowing device is lowered pivoted relative to the lift link A mower that is supported so as to be switchable to a downward mounting posture that is directed downward of the vehicle body,
The front bumper of the self-propelled vehicle body is provided with a stopper portion that acts to receive and act on the mowing device that has been rotated upward on the front side of the self-propelled vehicle body ,
The front bumper is constituted by a bar so as to include a pair of left and right vehicle body vertical bars and a vehicle body horizontal bar that connects the pair of left and right vehicle vertical bars,
A mowing machine in which the front bumper is arranged so that an attachment member of the mowing apparatus enters between the pair of left and right body vertical bars in the state in which the mowing apparatus is rotated upward . The front bumper, mowing machine according to claim 1, wherein are provided a support portion of the working light.

Images