JP5184859B2 - Management machine tail wheel - Google Patents

Description

  The present invention relates to a tail wheel of a management machine. More specifically, the present invention relates to a tail wheel technology that can be easily changed to a single tail wheel type and a twin tail wheel type only by changing the mounting direction of the wheel.

  Some management machines can change the direction in which the handle is attached depending on the work state. For example, in middle tillage work or upright work, the handle protrudes backward and is fixed, and the tail wheel passes through the field after tillage. Since the tail wheel passes through the cultivated field during the middle tillage operation, it is better to use a single-tail wheel type tail wheel device constituted by one wheel with less resistance from the field. Further, in the earthing work or the like, the handle protrudes and is fixed to the front above the engine, and is advanced in the opposite direction so that the tail wheel passes through the field before tilling. At the time of this earthing work, since the rotary tiller is a center drive system, it is more suitable to mount a twin tail wheel type tail wheel device composed of a pair of wheels so as to straddle the remaining tillage.

As shown in FIG. 3 (a), the tail wheel has a single tail wheel type tail wheel 4 in which an inverted L-shaped tail wheel arm 42a is fixed to the lower end of the support rod 42, and the tail wheel arm 42a. An axle 43 is horizontally provided at a lower portion of the vehicle, and wheels 44 are rotatably supported on the axle 43 (see Patent Document 1). As shown in FIG. 3 (b), the twin tail wheel type tail wheel 5 is fixed to the lower end of the support rod 52 at the center of the upper end of the gate-shaped tail wheel arm 52a, from the lower part of the tail wheel arm 52a. Axles 53 and 53 project outwardly, and wheels 54 and 54 are rotatably supported by the axles 53 and 53 (see Patent Document 2). And the said support rod can be attached to the height adjustment means provided in the rear part of a rotary tiller so that attachment or detachment is possible.
JP 2006-246775 A JP-A-10-295107

  Normally, when a management machine is purchased, a single tail wheel type or a twin tail wheel type tail wheel is attached. However, when it is desired to clean the finish, the single tail wheel type tail wheel 4 is attached during the middle tillage work, and the double tail wheel type tail wheel 5 is attached during the earthing work. In addition, it is disadvantageous in that it is necessary to prepare a storage place because it is necessary to prepare each of them, and it is necessary to separately store those that are not used.

  The present invention has been made in view of such problems, and it is not necessary to prepare a single tail wheel type tail wheel and a twin tail wheel type tail wheel, respectively, and it is easy to change the single tail wheel type or An object is to provide a tail wheel that can be changed to a twin tail wheel type.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

In Claim 1, it is a tail wheel (40) with which the traveling wheel of a management machine (1) is mounted | worn before or behind, and this tail wheel (40) is a management machine (1) main body or a rotary tillage which is a working machine. A tail wheel support (32) for attaching to the device (2), a pair of left and right wheels (34, 34) attached to the tail wheel support (32), and a tail wheel support for the wheels (34, 34) A wheel support shaft (33) for rotatably supporting the body (32), and a rear-view portal tail wheel arm (35) at the lower portion of the tail wheel support body (32). The arm (35) is configured as a rear portal from the horizontal arm (35a) and the vertical arm (35b / 35b), and the upper end of the vertical arm (35b / 35b) is fixed to the left and right sides of the horizontal arm (35a). The wheel support shaft (33) is inserted in the lower part of the vertical arm (35b, 35b) to A shaft hole for opening is opened, and the portion where the wheel support shaft (33) inserted into the shaft hole protrudes from the vertical arm (35b, 35b) is fixed by a fixing means so as to prevent it from coming off, and the fixing means is released. Thus, the wheel support shaft (33) can be extracted from the shaft hole of the vertical arm (35b, 35b), and the wheel (34, 34) is composed of a wheel portion (34a) and a boss portion (34b). The boss portion (34b) is a pipe-like member that can be fitted onto the wheel support shaft (33), and two bosses (34, 34) are arranged on the wheel support shaft (33). The left and right lengths in the axial direction of the portions (34b and 34b) can be fitted between the left and right vertical arms (35b and 35b), and the wheel support shaft (33) is removed from the vertical arms (35b and 35b). Left and right wheels (3 on the wheel support shaft (33)) A double-tail wheel type in which the mounting direction of 34) is changed and the bosses (34b, 34b) of the left and right wheels (34, 34) are butted against the wheel support shaft (33); The left and right lengths (L) between the wheel portions (34a, 34a) can be changed to a single tail wheel type fitted in a state where the wheel portions (34a) are abutted with each other. ) Is configured to be longer than the width of the tillage claw drive case (21) of the rotary tiller (2).

  According to claim 2, in the tail wheel of the management machine according to claim 1, the fixing means for the vertical arm (35b, 35b) of the wheel support shaft (33) is at least one side of the wheel support shaft (33). A pin hole (33a) is opened at the end of the pin, and a locking pin (37) is inserted into the pin hole (33a) to prevent the pin from coming off.

As effects of the present invention, the following effects can be obtained.
Since it is configured as in claim 1, it is mounted in a state where it is a twin tail wheel type in which the boss portions of the left and right tail wheels are butted on the wheel support shaft and in a state where it is a single tail wheel type in which the wheel portions are butted together. It becomes possible, and it is possible to change the wheel according to the work and clean the finish. Further, it is not necessary to prepare two types of tail wheels, and it is not necessary to secure a storage place for the other type tail wheel.

  In addition, in the state of the twin tail wheel type, the wheel travels across the residual tillage, and the finish can be cleaned by the earthing work.

  Since it comprised like Claim 2, a wheel support axis | shaft can be easily removed and a wheel can be changed only by attaching and detaching a locking pin.

  Below, the tail wheel 40 of the management machine 1 which is one Embodiment of this invention is demonstrated with reference to drawings. FIG. 1 is a side view showing the overall configuration of a management machine according to an embodiment of the present invention, FIG. 2 (a) is a front view showing a single-tail wheel type wheel arrangement A, and FIG. It is a front view which shows the wheel arrangement | positioning B of a tail wheel type. In the following, the direction of the arrow F in FIG. Also, the arrow U direction is set as the upward direction, and the vertical direction is determined. Furthermore, a direction perpendicular to both the arrow F direction and the arrow U direction (a direction perpendicular to the paper surface) is determined as the left-right direction.

  The management machine 1 shown in FIG. 1 has an engine 11 mounted on the front upper part of the machine body frame 12 and a mission case 13 provided on the rear part of the machine body frame 12 to constitute a management machine body.

  An axle 14 protrudes from the front lower portion of the mission case 13 on both the left and right sides. Traveling wheels 15 are attached to the left and right ends of the axle 14. Further, the power from the engine 11 is transmitted to the transmission case 13 via a belt, a pulley, and the like in the belt case 9, and the power is transmitted to the axle 14 via a transmission mechanism in the transmission case 13. .

  A handle base is formed on the top of the mission case 13, and a base portion of the handle 19 is mounted on the handle base so as to be able to change back and forth. In other words, a pivot shaft is provided above the handle base, and the handle 19 is attached to the pivot shaft so as to be pivotable back and forth. On the other end side of the handle 19, a side clutch lever 20, an accelerator lever, a main clutch lever, and the like are disposed.

  A rotary tiller 2 is mounted on the rear part of the transmission case 13 as a working machine via a hitch 10. The rotary tiller 2 is provided with a tilling claw driving case 21 in the vertical direction at the front left and right center, a tilling claw shaft 16 is horizontally mounted on the lower portion of the tilling claw driving case 21, and a plurality of tilling claws 16 are mounted on the tilling claw shaft 16. 18 are planted. An input shaft is mounted horizontally on the top of the tillage claw drive case 21, and a transmission case 22 is provided between the input shaft and the PTO shaft discharged from the upper side of the transmission case 13 to power the engine 11. The PTO shaft protruding from the transmission case 13 is configured to be able to transmit to the tilling claw shaft 16 via a pulley and belt in the transmission case 22, a sprocket and a chain in the tilling claw driving case 21, and the like.

  Further, a support frame 17 protrudes behind the tillage claw drive case 21, and a tail wheel mounting portion 31 is provided at the rear end of the support frame 17. The tail wheel device 3 is attached to the tail wheel attachment part 31 so that the vertical height can be adjusted. That is, the tail wheel device 3 includes a support pipe 23, an adjustment handle 24, a tail wheel 40, and the like. The support pipe 23 is inserted into the tail wheel mounting portion 31 so as to be slidable in the vertical direction, and is fixed by tightening a fixing screw at a desired position, so that the height can be adjusted. A support rod 36 of a tail wheel 40, which will be described later, is inserted into the support pipe 23 from below, and a screw shaft (not shown) protruding from the adjustment handle 24 is screwed onto the support rod 36. . The adjustment handle 24 is rotatably supported on the support pipe 23. Thus, by rotating the adjustment handle 24, the support rod 36 is raised or lowered, and the height of the tail wheel 40 can be finely adjusted.

  Next, the tail wheel 40 of the management machine according to the present invention will be described. As shown in FIG. 2, the tail wheel 40 includes a tail wheel support body 32 to be attached to a management machine body or a work machine (rotary tilling device 2 in this embodiment), and a pair of left and right wheels attached to the tail wheel support body 32. Wheels 34 and 34, and a wheel support shaft 33 for rotatably supporting the wheels 34 and 34 on the tail wheel support 32.

  The tail wheel support body 32 includes a support rod 36 and a tail wheel arm 35. The support rod 36 is attached to the support pipe 23 as described above. However, in the case of a small management machine, it is an inexpensive tail wheel. Moreover, it can also be set as the structure directly attached to the attachment part 31 independently. Moreover, the tail wheel 40 may arrange | position the rotary tiller 2 in front of the traveling wheel 15, and the tail wheel 40 is arrange | positioned in the front end in this case. The tail wheel arm 35 is formed in a rear gate shape from the horizontal arm 35a and the vertical arms 35b and 35b. The lower end of the support rod 36 is fixedly installed on the upper left and right central upper surfaces of the horizontal arm 35a. The upper ends of the vertical arms 35b and 35b are fixed on both the left and right sides of the horizontal arm 35a and extend downward, and the wheel support shaft 33 is horizontally mounted below the vertical arms 35b and 35b. That is, a shaft hole (not shown) for inserting the wheel support shaft 33 is opened at the lower part of the vertical arms 35b and 35b. A fixing means for the wheel support shaft 33 opens pin holes 33a on both sides of the wheel support shaft 33 so as to be orthogonal to the shaft center, and inserts locking pins 37 into the pin holes 33a to prevent them from coming off and fix them. However, a screw part can be formed on one side or both sides and fixed to the vertical arm 35b with a nut. The fixing means is released and the wheel support shaft 33 can be easily removed from the vertical arms 35b and 35b. The fixing structure is not limited as long as it can be put out.

  Since the left and right wheels 34 have the same configuration, only one side will be described. The wheel 34 is configured such that a through hole is opened in the shaft center portion, and the wheel support shaft 33 is inserted to be rotatably supported. However, a bearing may be interposed between the wheel 34 and the wheel support shaft 33 so as to further reduce the frictional resistance against rotation. Further, in order to reduce the friction with the vertical arm 35b, it is possible to interpose a collar between the wheel 34 and the vertical arm 35b in a state where the wheel 34 is mounted on the wheel support shaft 33.

  The wheel 34 includes a wheel portion 34a and a boss portion 34b. The wheel portion 34a is formed in a disc shape and has a lateral width (thickness) that does not sink into the soil during tillage work. The wheel portion 34a may be configured by a single disk or may be configured by fitting an elastic body such as rubber on the outer periphery thereof, and the configuration is not limited. Further, the boss portion 34b may be fixed to the axis of the wheel portion 34a, or the boss portion 34b may protrude from the center on the left and right sides of the wheel portion 34a.

  The boss part 34b is a pipe-like member, and in the state where two wheels 34 and 34 are arranged on the wheel support shaft 33, the left and right length L of the two boss parts 34b and 34b (between the wheels 34 and 34) is It is configured to be longer than the width of the tillage claw drive case 21. In other words, as shown in FIG. 2 (a), one side of the boss portions 34b and 34b of the pair of wheels 34 and 34 are attached to each other on the wheel support shaft 33 during the earthing work, so-called double tail type. Work as wheel arrangement A. At this time, since the tillage claw drive case 21 is located at the center of the left and right, the remaining tillage occurs. If the remaining tillage part is stepped on before plowing, the finish will be worse, so it is more advantageous to straddle. Therefore, when the two bosses 34b are arranged side by side so as to straddle the remaining tillage part, the width of the tillage nail drive case 21 Make up long. In addition, during middle tillage work and the like, the wheels 34 and 34 pass through the field after plowing, so that it is clear that one line is formed rather than two lines after the work. And it is better that the line is as narrow as possible. Therefore, in this invention, it is set as the wheel arrangement | positioning B of the single tail wheel type which abuts the right and left one side of the wheel part 34a.

  As described above, the tail wheel 40 is attached to the front or rear of the traveling wheel 15 of the management machine 1, and the tail wheel 40 includes the tail wheel support 32 for attaching to the management machine body or the work machine, and the tail wheel 40. A pair of left and right wheels 34 and 34 attached to the wheel support 32 and a wheel support shaft 33 for rotatably supporting the wheels 34 and 34 on the tail wheel support 32 are provided. A rear-view portal-shaped tail wheel arm 35 is provided at the bottom, and the wheel support shaft 33 is detachably mounted between the left and right vertical arms 35b and 35b of the tail wheel arm 35, and the wheels 34 and 34 are A wheel portion 34a and a boss portion 34b projecting from the central side surface of the wheel portion 34a are provided, and a pair of left and right wheels 34 and 34 are detachably mounted on the wheel support shaft 33 and are rotatably supported. So left on the wheel support shaft 33 It can be installed in the state of a twin tail wheel type in which the bosses 34b of the tail wheel 40 are butted together and in the state of a single tail wheel type in which the wheel parts 34a are butted together, and the wheel 34 is changed according to the work. , Can finish the finish. Further, it is not necessary to prepare two types of tail wheels, and it is not necessary to secure a storage place for the other type tail wheel.

  Moreover, since the length in the axial center direction of the boss portions 34b and 34b arranged side by side is longer than the width of the tillage claw drive case 21 when the working machine is the rotary tiller 2, In the state of the wheel type, the wheels 34 and 34 travel over the remaining tillage, and the finish can be cleaned by the earthing work.

  In addition, a pin hole 33a is opened at least at one end of the left and right sides of the wheel support shaft 33, and the locking pin 37 is inserted into the pin hole 33a to be fixed so that the locking pin 37 is fixed. The wheel support shaft 33 can be easily removed and the wheels 34 and 34 can be replaced simply by attaching and detaching.

The side view which showed the whole structure of the management machine which concerns on one Example of this invention. (A) Front view showing wheel arrangement A of a single tail wheel type, (b) Front view showing wheel arrangement B of a twin tail wheel type. (A) The front view which shows the conventional single-wheel type tail wheel 4, (b) The front view which shows the conventional double-tail type tail wheel 5. FIG.

DESCRIPTION OF SYMBOLS 3 Tail wheel device 4 Single tail wheel type tail wheel device 5 Twin tail wheel type tail wheel device 32 Tail wheel support body 33 Tail wheel support shaft 34 Wheel 34a Wheel part 34b Boss part 35 Tail wheel arm 36 Support arm

Claims (2)

A tail wheel (40) mounted on the front or rear of the traveling wheel of the management machine (1), the tail wheel (40) being attached to the rotary tiller (2) that is the management machine (1) main body or the work machine. Tail wheel support (32), a pair of left and right wheels (34, 34) attached to the tail wheel support (32), and rotating the wheels (34, 34) to the tail wheel support (32) A wheel support shaft (33) for freely supporting, and a rear-view portal-shaped tail wheel arm (35) at the bottom of the tail wheel support (32), the tail wheel arm (35) The lateral arm (35a) and the vertical arm (35b, 35b) are configured in a rear view portal shape, and the upper end of the vertical arm (35b, 35b) is fixed to the left and right sides of the horizontal arm (35a). 35b and 35b) have a shaft hole for inserting and supporting the wheel support shaft (33) horizontally. Then, the wheel support shaft (33) inserted into the shaft hole is fixed in a state in which the wheel support shaft (33) protrudes from the vertical arm (35b, 35b) in a retaining state by a fixing means, and the wheel supporting shaft is released by releasing the fixing means. The shaft (33) can be extracted from the shaft hole of the vertical arm (35b, 35b), and the wheel (34, 34) includes a wheel portion (34a) and a boss portion (34b), and the boss portion (34b) Is a pipe-like member that can be externally fitted to the wheel support shaft (33), and in the state where two wheels (34, 34) are arranged on the wheel support shaft (33), the boss portions (34b, 34b) The left and right lengths in the axial direction can be fitted between the left and right vertical arms (35b and 35b), the wheel support shaft (33) is removed from the vertical arms (35b and 35b), and the wheel support shaft ( 33) Mounting direction of the left and right wheels (34, 34) The two tail wheel type fitted in a state where the boss portions (34b, 34b) of the left and right wheels (34, 34) are butted against the wheel support shaft (33), and the wheel portions (34a) It can be changed to a single tail wheel type fitted in the butted state, and the left and right length (L) between the wheel portions (34a, 34a) is a rotary tiller (2 The tail wheel of the management machine characterized in that it is configured to be longer than the width of the tillage claw drive case (21).   The tail wheel of the management machine according to claim 1, wherein the fixing means for the vertical arm (35b, 35b) of the wheel support shaft (33) is a pin at least on one end of the left and right sides of the wheel support shaft (33). A tail wheel for a management machine, characterized in that a hole (33a) is opened, and a locking pin (37) is inserted into the pin hole (33a) to prevent the pin from coming off.

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