JP2008212008A - Transmission gear of front mower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a front mower smoothly perform the action of collecting and feeding grass into a duct or the action of conveyance through the duct. <P>SOLUTION: A transmission case 3 for inputting the power of an engine 2 is supported on a machine body frame 16, and an interlocking mechanism, which interlocks a pump shaft 32 of an HST (hydraulic static transmission), is arranged in the rear of the inside of the transmission case 3. An interlocking mechanism, which interlocks a fan shaft 8 of a blower 5 for sucking in and conveying lawn grass reaped by a mower deck 17 so as to convey and house the lawn grass into a collector 23 on the rear upper part, is arranged in the front thereof. Transmission shafts 56 and 37 for front wheels 12 are arranged in front and rear intermediate parts, respectively. An HST case 1 is mounted on the rear lateral face of the transmission case 3, and the blower 5 is detachably attached to the front lateral face of the transmission case 3 via a spacer 4 in a superimposed state. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention provides a blower that sucks and conveys turf grass cut by the mower deck and conveys and accommodates it to a collector at the rear of the vehicle body in a front mower in which a mower deck is mounted at the front of the tractor body. The present invention relates to a transmission device that simplifies the transmission configuration.

The mower deck and the collector are connected by a shooter and blower, and the turf grass mowed by the mower deck is sucked and transported by the blower and sent to the collector for collection, and this blower is placed at the rear of the driver's seat The technique (for example, refer patent document 1) etc. to perform is known.
JP-A-63-98313 (first page, FIG. 1).

  In the front mower and the mid mower, a shooter is provided on the side or abdomen of the tractor vehicle body, and a blower is connected to the rear upper part of the shooter so that the cut grass is transported to the rear upper collector. The turfgrass conveyance path in a blower or the like becomes long, and is likely to cause clogging. When this clogging occurs, a part of these conveyance systems is opened to remove the clogged turfgrass. In addition, if the blower fan is rotated at a high speed in order to increase the conveying capacity of the blower, noise is increased and the work fatigue level is easily increased.

  The invention according to claim 1 supports the mission case 3 for inputting engine 2 power to the body frame 16, and an interlocking mechanism for interlocking the HST pump shaft 32 is disposed in the rear of the mission case 3. An interlocking mechanism that interlocks with the fan shaft 8 of the blower 5 that sucks and conveys the turfgrass that is harvested at 17 and transports and accommodates it in the collector 23 at the upper rear is disposed at the front, and a transmission shaft 56 to the front wheel 12 at the front and rear intermediate portions 37, the HST case 1 is attached to the rear side surface of the mission case 3, and the front mower transmission device is detachably attached to the front side surface of the mission case 3 with the spacer 4 interposed in a superposed state. The configuration is as follows.

    On the rear side of the transmission case 3, an input transmission shaft from the engine 2 is supported and an HST case 1 is attached. On the front side, a blower 5 is attached with a spacer 4 interposed in a superposed state. The blower 5 is transmitted via the input transmission shaft 30 driven from the engine 2 side, and the traveling wheels 12 and 13 are driven via the HST in the HST case 1. By driving the blower 5, the turf grass cut by the mower deck 17 is sucked and transported, and transported and accommodated in the collector 23 at the upper rear.

  According to a second aspect of the present invention, a switching valve 6 for operating a hydraulic clutch is attached to the spacer 4. The blower 5 is turned on and off by a blower clutch 42 in the mission case 3. The blower clutch 42 is turned on and off by operating the hydraulic pressure switching valve 6 attached to the spacer 4. Since this switching valve 6 is attached to the spacer 4 on the front side of the transmission case 3, the piping distance to the blower clutch 42 can be shortened, and the mounting restriction due to the form of the transmission case 3 can be reduced. , Mounting and the like can be simplified.

  According to a third aspect of the present invention, the suction port 7 of the blower 5 is formed in the front surface, and the blower case 9 and the blower fan 10 are mounted from the front side with respect to the fan shaft 8 bearing on the spacer 4 so as to be detachable. Is provided. The blower 5 and the like can be attached and detached by removing the mower deck 17 and the suction cylinder 21 in the front part of the suction port 7 of the blower 5 and opening the blower 5 widely and inserting a hand into the suction port 7 from the inside. The blower 5 can be attached / detached, maintained, and the like.

  In the first aspect of the invention, the HST case 1 is attached to the rear side of the transmission case 3 and the blower 5 is provided at a lower position below the driver's seat 11, so that the transport path from the mower deck to the rear collector is shortened. As a form, it is possible to smoothly carry out suction conveyance of the mowing turfgrass from the front mower deck 17 by the suction cylinder 21, thereby reducing grass clogging. Further, by removing the suction cylinder etc. on the front side of the blower 5, it is possible to simplify and facilitate the shaft mounting and removal of the blower 5. Moreover, since the blower 5 is supported by the spacer 4, the bearing and mounting structure of the blower 5 can be stabilized, and maintenance can be facilitated.

According to the second aspect of the present invention, since the switching valve 6 is mounted at a position close to the hydraulic blower clutch 42 for the blower 5, the mounting configuration can be simplified.
According to the third aspect of the invention, by removing the suction cylinder on the front side of the blower 5, the suction port 7 is opened, and the blower fan 10, the blower case 9, and the like can be easily attached to and detached from the fan shaft 8 bearing on the spacer 4. Can be easily.

  Embodiments of the present invention will be described with reference to the drawings. The body frame 16 of the tractor front mower has a front wheel 12 disposed below the driver's seat 11 and a rear wheel 13 disposed rearward. The rear wheel 13 is steered by a steering handle 15 in front of the step floor 14. The vehicle is configured to be in a four-wheeled riding mode that is driven by an engine 2 mounted on the rear.

    The mower deck 17 is provided at the front portion of the vehicle body frame 16 below the step floor 14 by a lift link, and is interlocked via a mower interlocking shaft 19 from a front PTO shaft 18 below the vehicle body 16. Further, a suction cylinder 21 for sucking and conveying turf grass cut by rotation of the left and right blade shafts 20 of the moor deck 17 and a blower 5 are provided on the front side of the vehicle body frame 16 and below the driver's seat 11. 5, it communicates with the collector 23 at the rear upper part via the discharge cylinder 22 on the rear side of the driver's seat 11. The collector 23 is provided above the engine 2 bonnet, and can be lifted and lowered by a telescopic expansion / contraction of a lift link, lift cylinder, dump cylinder, etc. (not shown) to open the rear lid 27. The contained turf can be discharged.

  The mower deck 17 can arrange a plurality of (for example, two) blade shafts 20 on the left and right sides, and can cut grass by rotating the blades. A discharge port 24 is formed in the rear central portion of the mower deck 17, and turf grass cut by the blade portion by rotation of each blade shaft 20 is collected to the discharge port 24, and a suction cylinder connected to the discharge port 24 is collected. 21 is connected to collect grass and transported. The blower 5 is provided at the lower side of the driver's seat 11, opens the suction port 7 toward the front side, and extends the discharge tube 22 upward through the rear side of the driver's seat 11 to communicate with the collector 23. . The engine 2 is mounted between the left and right rear wheels 13 at the rear part of the blower 5.

  Here, in the transmission device according to the present invention, the HST case 1 is attached to the rear side, and the blower 5 is detachably attached to the front side surface of the transmission case 3 for inputting the power of the engine 2 with the spacer 4 interposed. On the rear side of the transmission case 3, an input transmission shaft from the engine 2 is supported and an HST case 1 is attached. A blower 5 is attached to the front side with a spacer 4 interposed therebetween. The blower 5 is transmitted through the input transmission shaft driven from the engine 2 side, and the traveling wheels are driven via the HST in the HST case 3. By driving the blower 5, turfgrass cut by the mower deck is sucked and transported and transported and accommodated in the rear upper collector.

  The spacer 4 is provided with a hydraulic pressure switching valve 6 for operating a hydraulic clutch. The switching valve 6 is a rotary valve, and is configured so that the pressure oil acts on the clutch piston via an oil passage formed on a shaft that supports the blower clutch 42 by switching the oil passage.

    The blower 5 is transmitted and cut by the blower clutch 42 in the mission case 3. The blower clutch 42 is turned on and off by operating the hydraulic pressure switching valve 6 attached to the spacer 4 as described above. Since this hydraulic switching valve 6 is attached to the spacer 4 on the front side of the transmission case 3, the piping distance to the blower clutch 42 can be shortened, and the mounting restriction due to the configuration of the transmission case 3 can be reduced. Configuration, installation, etc. can be simplified.

  A suction port 7 of the blower 5 is formed on the front surface, and a blower case 9 and a blower fan 10 are mounted on the fan shaft 8 bearing the spacer 4 from the front side so as to be detachable. The blower 5 and the like can be attached and detached by removing the mower deck 17 and the suction cylinder 21 in the front part of the suction port 7 of the blower 5 and opening the blower 5 widely and inserting a hand into the suction port 7 from the inside. The blower 5 can be attached / detached, maintained, and the like.

  The engine 2 is provided with a radiator 28 and an output shaft 29 on the front side, and between the engine 2 and the blower 5, a transmission case 3, an HST (hydraulic continuously variable transmission) HST case 1 and the like are provided. In the transmission case 3, a traveling transmission mechanism that links the front wheels 12 and the rear wheels 13 that are the traveling wheels by transmission from the hydraulic motor of the HST, a blower transmission mechanism that transmits the blower 5, and the like are arranged.

    An input shaft 30 is supported at the rear of the transmission case 3 and connected to the output shaft 29 of the engine 2 by an interlocking shaft 31. The HST case 1 is attached, and the pump shaft 32 of the HST is connected to the input shaft. 30 is interlocked by the gear 33, and the axle 35 of the rear rear wheel 13 is interlocked from the motor shaft 34. A differential gear 36 and left and right differential shafts 37 are provided in a substantially central portion of the situation case 3, and the gear 38 is interlocked with the front end portion of the motor shaft 34.

    The axle 41 of the front wheel 12 is transmitted from the outer ends of the left and right differential shafts 37 via the chain 40 of the wheel transmission case 39. Above the differential gear 36, a blower clutch 42 in the form of a hydraulic multi-panel is provided on an interlocking shaft 44 transmitted from the input shaft 30. The fan shaft 8 bearing on the front side wall 43 of the transmission case 3 from the blower clutch 42 is interlocked with the gear 45.

    On the front side wall 43 of the transmission case 3, the spacer 4 made of a rectangular plate having a thickness and a cross-sectional shape is superposed and attached by tightening bolts 46. A fan shaft 8 is supported by a bearing 47 at the center of the spacer 4. The rear surface of the blower case 9 is superposed on the front surface of the spacer 4 and attached by tightening bolts 48. A mounting disc 50 is attached to the central portion of the rear wall portion 49 of the blower case 9, and a boss hole 51 formed in the central portion of the mounting disc 50 is fitted around a bearing boss portion 52 protruding forward from the spacer 4. Let

  A suction port 7 is formed on the front surface of the blower case 9, and a suction cylinder 21 is connected to the exhaust port 24 of the mower deck 17. A connection guide cylinder 53 is swingably and detachably provided at the suction port 7 by bolting outside the figure, and the rear end portion of the suction cylinder 21 is fitted into the guide cylinder 53 so as to communicate therewith. The suction port 7 with the guide cylinder 53 removed is formed to be larger than the rotation diameter of the blower fan 10, and the blower fan 10 is taken out from the suction port 7 to the front side or fitted into the blower case 9 to be attached or detached. be able to. A fan boss 54 fitted from the front side to the fan shaft 8 of the blower fan 10 is fixedly attached by a lock bolt 55 screwed from the front end portion of the fan shaft 8. The blower fan 10 can be attached / detached by operating the lock bolt 55, and the blower case 9 can be attached / detached by operating the set bolt 48 with the blower fan 10 removed.

  The left and right wheel transmission cases 39 support the front end portion of the vehicle body frame 16 through the bracket 60 with respect to the front portion of the vehicle body frame 16. Further, a cover 61 covering the upper part of the differential shaft 37 on both the left and right sides of the transmission case 3 and a mounting bracket 62 for attaching the cover 61 are provided. The PTO shaft 18 linked to the front mower deck 17 has a pulley 63 with its rear end positioned on the outer side of the HST case 1, and a belt 65 is hung between the pulley 64 of the input shaft 30. Be transmitted.

    The front portion of the PTO shaft 18 is supported by a bearing metal 66 attached to the inner side of the left wheel transmission case 39 and is linked to the input shaft of the front mower deck 17. A counter-shaft 56 between the motor shaft 34 and the differential shaft 37 is provided with a pre-diff brake 57 for braking in the front transmission stroke of the differential gear 36. Further, around the differential shafts 37 on the left and right sides, post-diff brakes 58 for braking the differential shafts 37 on the lower side of the differential gear 36 are provided.

  A seat cover 67 is provided above the mission case 3, HST case 1, blower 5, etc., and a driver's seat 11 is provided on the seat cover 67. A fuel tank 68 is provided below the rear portion of the seat cover 67 so as to cover both left and right sides. The bottom end of the fuel tank 68 is raised, and a lift valve for raising and lowering the collector 23, a valve 69 such as a dump dump valve, an oil filter 70 for HST charge, and the like are disposed below the bottom. . A battery 71 bracket 72 is provided outside the oil filter 70 and the pulley 63 portion of the PTO shaft 18 to protect the oil filter 70.

  Next, based on FIGS. 4, 8, and 9, the link shaft 76 that interlocks with the brake link 75 of the pre-diff brake 57 can freely rotate to the boss portion 77 at the side end of the spacer 4 to which the blower 5 is attached. To bypass the front side of the blower 5. The outer end of the link shaft 76 is brought close to the one-side differential post-brake 58 portion, and the brake arms 78 and 79 are connected to the brake pedal 80 by parallel brake rods 82 and 83. Further, the brake arm 79 of the post-deflation brake 58 on the other side is interlocked with the brake rod 83. Reference numeral 81 denotes an HST pedal, which forwards, reverses, increases, and decelerates the HST.

  Next, based on FIGS. 10 and 11, the operation lever 85 for operating the hydraulic pressure switching valve 6 to turn on and off the blower clutch 42 and the mower clutch lever for the mower clutch interlocked with the blade shaft 20 of the mower deck 17 are simply connected. As one form, it is made to guide to the lever guide 86 of the crank form of the driver's seat 11 left hand side. When the operation lever 85 is positioned at the central portion N of the lever guide 86, the blower clutch 42 can be engaged and the mower clutch can be disconnected, and when the operation lever 85 is positioned at the rear side R, the blower clutch 42 can be disconnected. When the front side F is located, the mower clutch is engaged. For this reason, by operating the operation lever 85 to the front side and driving the blade shaft 20 of the mower deck 17 after driving the blower 5, it is possible to reduce the clogging of the cut grass. Reference numeral 90 denotes an elevating lever that elevates and lowers the mower deck 17 and is provided adjacent to the operation lever 85.

  On the left side of the vehicle body frame 16, an oil supply port 87 of the fuel tank 68, a battery 71, a reserve tank 88 of the radiator 28, an engine oil gauge 89, and the like are arranged to improve the maintainability thereof. .

The left view of a mission case part. The left view of the transmission mechanism. An external left side view of the front mower. The left view of the tractor body part 1. FIG. Front view of the front mower. The front view of a blower part. Front view of fuel tank The right view of a mission case part. The front sectional view of the brake part. The top view of a front mower. The perspective view of the operation lever part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 HST case 2 Engine 3 Mission case 4 Spacer 5 Blower 6 Switching valve 7 Suction port 8 Fan shaft 9 Blower case 10 Blower fan 11 Driver's seat 21 Suction cylinder

Claims (3)

  A transmission case (3) for inputting engine (2) power to the body frame (16) is supported, and an interlocking mechanism for interlocking the pump shaft (32) of the HST is disposed in the rear of the transmission case (3). An interlocking mechanism that interlocks the fan shaft (8) of the blower (5) that sucks and conveys the turf grass mowed by the mower deck (17) and conveys and accommodates it in the collector (23) at the upper rear is arranged at the front and middle Is provided with a transmission shaft (56, 37) to the front wheel (12), an HST case (1) is attached to the rear side of the transmission case (3), and a spacer is attached to the front side of the transmission case (3). A front mower transmission device in which the blower (5) is detachably mounted with the (4) interposed in the polymerization state.   The transmission device for a front mower according to claim 1, wherein a switching valve (6) for operating a hydraulic clutch is attached to the spacer (4). A suction port (7) of the blower (5) is formed on the front surface, and a blower case (9) and a blower fan (10) are mounted from the front side to the fan shaft (8) bearing on the spacer (4). The front mower transmission device according to claim 1, wherein the front mower transmission device is detachably provided.

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