Walking type cultivator

Abstract

To provide a walking type management machine which reduces vibration of a cover covering an engine and reinforces attachment to the engine.SOLUTION: In a walking type management machine, a machine body (1) includes an engine (E) and a hood (4) is provided above the engine (E) through a hood bracket (40). The food bracket (40) forms an engagement part having a C shaped cross section facing downward and is fitted in the engine (E) from above and fixed to the engine (E) from a lateral direction.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to the technology of a walking-type management machine in which a hood is attached to an engine.

Background Art

[0002] Conventionally, a walking-type management machine that tills a field and performs operations such as furrowing is known, as in the technology disclosed in Patent Document 1.

[0003] In a conventional walking-type management machine, a cover member (hood) that covers the engine is put on from above the mounting stay, and the mounting stay is bolted to the engine in the vertical direction.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, according to the configuration of the conventional walking-type management machine described above, when the cover is attached to the machine body and work is performed, there is a problem that rattling due to the aging deterioration of the cover caused by the vibration of the engine or the machine body cannot be prevented.

[0006] An object of the present invention is to provide a walking-type management machine that reduces the vibration of a cover that covers an engine and firmly attaches the cover to the engine in view of such problems of the conventional walking-type management machine.

Means for Solving the Problems

[0007] To solve the above problems, the present invention has taken the following technical means.

[0008] The invention according to claim 1 is a walking type cultivator equipped with an engine (E) on a machine body (1), and a hood (4) above the engine (E) via a hood bracket (40), wherein the hood bracket (40) is configured to have an engagement portion with a downward-facing U-shaped cross-section that fits onto the engine (E) from above, and is fixed to the engine (E) from the left and right directions. The walking-type cultivator is characterized in that it is provided with a drive unit (K) below the engine (E) that transmits power from the engine (E), a tension arm (T) on the drive unit (K) that switches the power transmission on and off, a cover (C) on the outside of the drive unit (K) that protects the drive unit (K), an opening (C1) below the cover (C), and a cover plate (C2) on the tension arm (T) that opens and closes the opening (C1) in accordance with the movement of the tension arm (T).

[0009] The invention according to claim 2 is a walk-type management machine according to claim 1, characterized in that a heat shield cover (46) is provided between the engine (E) and a muffler cover (MC) that covers a muffler that discharges exhaust gas from the engine (E), and the heat shield cover (46) is attached to the hood bracket (40).

[0010] (delete)

[0011] (delete) [Effects of the Invention]

[0012] According to the present invention as described in claim 1, the hood bracket (40) is fastened and secured from the outside of the engine (E) in the left-right direction of the airframe, making it easier to secure the hood bracket (40) and reducing rattling of the hood (4) due to vibrations of the engine (E). Furthermore, the opening (C1) allows maintenance of the drive unit (K) without removing the cover (C). In addition, when the clutch is in the "engaged" state, i.e., when the drive unit (K) is moving, the opening (C1) is covered by the cover plate (C2), preventing the worker from touching the drive unit (K), thus improving maintainability and safety.

[0013] According to the present invention as described in claim 2, the heat shield cover (46) provided on the hood bracket (40) can cover the space between the engine (E), which becomes hot, and the muffler cover, thereby preventing accidental contact by workers and preventing the hood bracket (40) from becoming hot, and improving safety.

[0014] (delete)

[0015] (delete) [Brief explanation of the drawing]

[0016] [Figure 1] Perspective view of the walking-type management machine of the present invention. [Figure 2] Side view of the walking-type management machine of the present invention. [Figure 3] Plan view of the cover of the walking-type management machine of the present invention. [Figure 4] Side view of the main part of the walking-type management machine of the present invention. [Figure 5] Perspective view of the hood bracket of the walking-type management machine of the present invention. [Figure 6] Plan view of the hood bracket of the walking-type management machine of the present invention. [Figure 7] Side view of the hood bracket of the walking-type management machine of the present invention. [Figure 8] (a) View of the stay of the walking-type management machine of the present invention, (b) View of the stay of the walking-type management machine of the present invention. [Figure 9] Perspective view of the hood bracket of the walking-type management machine of the present invention. [Figure 10] Plan view of the hood bracket of the walking-type management machine of the present invention. [Figure 11] Perspective view of the hood bracket of the walking-type management machine of the present invention. [Figure 12] Plan view of the hood bracket of the walking-type management machine of the present invention. [Figure 13] Side view of the main part of the walking-type management machine of the present invention. [Figure 14] Side view of the drive part of the walking-type management machine of the present invention. [Figure 15] Side view of the drive part of the walking-type management machine of the present invention. [Figure 16] Plan view of the main part of the handle operation part of the walking-type management machine of the present invention. [Figure 17] Perspective view of the switch panel of the walking-type management machine of the present invention. [Figure 18] Enlarged view of the main part of the drive part of the walking-type management machine of the present invention. [Figure 19] Enlarged view of the main part of the engine of the walking-type tillage management machine of the present invention. [Figure 20] Rear view of the main part of the walking-type management machine of the present invention. [Modes for carrying out the invention]

[0017] The following describes the basic configuration and operation of the machine body 1 of a walking-type management work machine, which is one embodiment of the present invention.

[0018] In the description of the embodiments, the left and right directions relative to the forward direction of the aircraft 1 are referred to as left and right, respectively, and the forward direction is referred to as forward and the reverse direction as backward, but this does not limit the configuration of the present invention.

[0019] The configuration of aircraft 1 will be explained based on Figure 1.

[0020] The walking-type tiller's body 1 is equipped with a main frame 3, on which the engine E and other components are mounted. Below the engine E is a transmission case D that transmits the engine E's power to various parts, and in front of the transmission case D are running wheels 2L and 2R on the left and right sides, respectively. Near the engine E is a fuel tank N that supplies fuel to the engine E, and a hood 4 that covers the engine E and other components from above. The hood 4 is equipped with a fuel gauge to check the remaining fuel level in the fuel tank N and a fuel filler port for refueling the fuel tank N.

[0021] The power of engine E is transmitted from the drive unit K to each part. An output pulley P1, located on the output shaft K1 of engine E, rotates. A belt V is wrapped around the output pulley P1 and an input pulley P2, located on the input shaft K2 to the transmission case D. Power is transmitted to the input shaft K2 via the belt V, and from the input shaft K2, power is transmitted to the wheel axles, etc., which are shifted within the transmission case D to drive the running wheels 2. The drive unit K is part of the transmission unit, and the transmission case D is located behind the drive unit K.

[0022] The transmission case D is equipped with an operating handle 5 on its upper part for the operator to operate the machine 1. More specifically, a handle bracket H is attached to the upper part of the transmission case D, and the handle bracket H is equipped with the operating handle 5. The operating handle 5 is equipped with operating devices such as a clutch lever 6 for operating the machine 1.

[0023] The following describes the configuration around Hood 4 and Engine E.

[0024] As shown in Figure 4, the top of the engine E is covered by a hood 4. The hood 4 consists of a front hood 41 and a rear hood 42, and is configured to be openable and closable by rotating the rear hood 42 around its left-right axis as a pivot point. The front hood 41 has a pivot point S at its rear, and an opening / closing stay 40Z is provided around the pivot point S so as to rotate around the left-right axis. The rear hood 42 is attached to the opening / closing stay 40Z, making the hood 42 openable and closable. This allows maintenance of the inside of the hood 4 and the fuel tank N without removing the hood 4.

[0025] The hood 4 is attached to the top of the engine E by a mounting component, the hood bracket 40. The hood bracket 40 is located below the front hood 41 and is bolted to the front hood 41 and the engine E.

[0026] As shown in Figures 5 and 6, the hood bracket 40 is a single integrated component formed by welding together the front bracket 40A, rear bracket 40B, front stay 44, rear stay 43, and heat shield cover 46. This integrated design facilitates attachment, removal, and maintenance.

[0027] The engine E and the hood bracket 40 are fixed together by fastening the female threads on the engine E side with bolts BT through three connection holes 40HA, 40HB, and 40HC provided in the front bracket 40A, as shown in Figures 7 and 9 (the shape of the engine E is simplified). Note that connection holes 40HA, 40HB, and 40HC may be formed as elongated holes so that the mounting position to the engine E can be adjusted.

[0028] Furthermore, a fuel tank bracket NB supporting the fuel tank N is detachably configured behind the hood bracket 40. The rear part of the rear bracket 40B has a connection hole 40N for connecting to the fuel tank bracket NB, and the front part of the fuel tank bracket NB has an elongated hole NU, which is fixed with a bolt and nut. The hood bracket 40 and the fuel tank bracket NB are connected by bolting. By forming the elongated hole NU, it becomes possible to adjust the front-to-back position of the fuel tank bracket NB.

[0029] The front bracket 40A is a bent L-shaped plate-like member, and includes an upper surface 40J that covers the top of the engine E and a side surface 40Y that covers the upper left side of the engine E.

[0030] A notch 40C is provided in front of the front bracket 40A. A front stay 44 is provided in the notch 40C. As shown in Figure 8(b), the front stay 44 is a roughly L-shaped stay, but the angles of the flat portion 44a and the inclined portion 44b are different. The front stay 44 consists of a flat portion 44a that is welded to the front bracket 40A, an inclined portion 44b that is inclined in the front-rear direction of the aircraft, and a front portion 44c that extends downward from the inclined portion 44b. The front portion 44c is provided with a hole for attaching the hood 4.

[0031] A rear stay 43 is provided on the rear right side of the front bracket 40A. As shown in Figure 8(a), the rear stay 43 is an L-shaped stay, consisting of a long portion 43a that is welded to the front bracket 40A and a short portion 43b that extends downward from the long portion 43a. The short portion 43b is provided with a hole for connecting to the engine E. The rear stay 43 may be equipped with a protective member to prevent the worker from coming into contact with the engine E. Note that the rear stay 43 may be provided on both the left and right sides, and there may be multiple rear stays.

[0032] As shown in Figure 20, the front bracket 40A has a downward-facing U-shaped engagement portion formed by the side 40Y and the rear stay 43, and is configured to be fitted from above the engine E. With the bracket fitted above the engine E, it is bolted from the outside in the left-right direction, making it easier to fix the hood bracket 40 to the engine E. In addition, because the hood bracket 40 is stably attached to the engine E, the effect of vibration on the hood 4 is reduced, and rattling of the hood 4 can be prevented.

[0033] A heat shield cover 46 is provided on the left side of the rear bracket 40B. As shown in Figure 6 (parts other than the essential parts are omitted), the heat shield cover 46 is provided between the muffler cover MC, which covers the muffler that discharges exhaust gas from the engine E to the outside of the machine, and the engine E. It is desirable that the heat shield cover 46 be integrated with the rear bracket 40B by welding, with the right end of the heat shield cover 46 and the left end of the rear bracket 40B overlapping.

[0034] The heat shield cover 46 can cover the area between the high-temperature engine E and the muffler cover MC, preventing accidental contact by workers and preventing the hood bracket 40 from becoming overheated. This improves safety.

[0035] Furthermore, the hood bracket may be configured as shown in Figure 10 (since this configuration is different from the hood bracket 40 up to Figure 9, the hood bracket from Figure 10 onwards will be referred to as hood bracket 40F). The hood bracket 40F in Figure 10 is a component that has two surfaces, a front bracket 40FA and a rear bracket 40FB, due to bending.

[0036] The hood bracket 40F is equipped with a right front stay 40M, a right rear stay 40R, a left front stay 40L, a front stay 44F, and a heat shield cover stay 46F, all of which are integrated by welding to the hood bracket 40F. In addition, the front side of the front bracket 40FA is provided with a notch 40FC, and the notch 40FC is provided with a stay protrusion 47. The tip of the stay protrusion 47 protrudes forward from the front end of the front bracket 40FA.

[0037] Furthermore, the rear bracket 40FB has a connection hole 40FN at its rear end, which connects to the fuel tank bracket NB. The connection hole 40FN of the rear bracket 40FB and the connection hole NH on the fuel tank bracket NB are aligned and fastened with bolts. Note that the connection hole NH is an elongated hole, allowing the mounting position to be adjusted in the front-to-rear direction of the aircraft when fastening the bolts.

[0038] As shown in Figure 11, the front stay 44F is mounted on the front bracket 40FA. The front stay 44F is a concave-shaped member, and its front end protrudes forward from the front end of the front bracket 40FA.

[0039] The left front stay 40L has two mounting holes for the engine E. The mounting holes for the right front stay 40M and the right rear stay 40R may also be elongated. By making the mounting holes elongated, it becomes possible to adjust the mounting position to the engine E.

[0040] An elastic member may be provided on the stay projection 47. By providing an elastic member on the stay projection 47, vibrations of the hood 4 and hood bracket 40F can be suppressed.

[0041] The hood bracket 40F is provided with fastening holes 48 through which harnesses and other components can be passed and secured. It is assumed that the harness will be passed through the fastening holes 48 and secured with a band. There may be one fastening hole 48 or multiple fastening holes. The fastening holes 48 may be provided on the upper surface of the left front stay 40L, on the upper front right surface of the rear bracket 40FB, on the upper rear right surface of the rear bracket 40FB, or in any combination thereof.

[0042] The rear bracket 40FB and the right rear stay 40R are equipped with identification holes 49 that allow identification of whether the holes are open or closed based on their welding positions.

[0043] The front stay 44F is provided with a bending hole 44H to maintain strength even when the member is bent. The bending hole 44H is configured to also be usable as a fastening hole. Multiple bending holes 44H may be provided, and at least one of the multiple bending holes 44H may be formed to be usable as a fastening hole.

[0044] The bend holes 44H may be used as identification holes to identify the welding position. Furthermore, if there are multiple bend holes 44H, at least one of them may be formed to be used as an identification hole.

[0045] The details of the drive unit K (hereinafter referred to as the belt drive mechanism) mentioned above will now be explained. The belt drive mechanism, which transmits the power of the engine E to the running wheels 2, etc., includes an output shaft K1 that rotates due to the drive of the engine E and an input shaft K2 that transmits the drive to the transmission case D. The output shaft K1 is equipped with an output pulley P1, and the input shaft K2 is equipped with an input pulley P2. A belt V is wrapped around the output pulley P1 and the input pulley P2. The input pulley P2 rotates together with the output pulley P1 due to the belt V.

[0046] The tension of the belt V can be adjusted to switch the input pulley P2 on and off, and this switching operation is performed by a clutch lever 6 provided on the operating handle 5. The belt transmission mechanism is equipped with a tension arm T. By operating the clutch lever 6, the tension arm T rotates vertically around the pivot point TS, and when it rotates upward, the tension pulley TP pushes up the belt V, transmitting power to the input shaft K2.

[0047] The belt drive mechanism is covered by a cover C to prevent workers from accidentally touching it. As shown in Figures 14 and 15, an opening C1 for maintenance work is provided below the cover C. Figure 14 shows the clutch in the "disengaged" state, and Figure 15 shows the clutch in the "engaged" state. The tension arm T is equipped with an L-shaped cover plate C2 that follows the movement of the tension arm T. When the tension arm T moves upward and the clutch is in the "engaged" state, the cover plate C2 covers the opening C1. This configuration allows the opening C1 to be covered when the clutch is in the "engaged" state, improving safety, and also allows maintenance work when the clutch is in the "disengaged" state. It is preferable that the cover plate C2 be welded to the inside of the tension arm T, but it may also be detachable.

[0048] Furthermore, as shown in Figure 18, the configuration of the cover C may be as follows: The aircraft body 1 is provided with a cover stay CS for attaching the cover C. An intermediate stay CT is provided between the cover stay CS and the engine E. That is, the intermediate stay CT, cover stay CS, and cover C are attached in order from the engine E outwards towards the outside of the aircraft body.

[0049] The intermediate stay CT also functions as a protective component, sealing the gap between the cover C and the engine E to prevent workers from accidentally touching the engine E. The mounting holes for attaching the cover stay CS and the intermediate stay CT are elongated to allow for adjustment of the mounting position. The cover stay CS and the intermediate stay CT are attached to the engine E by being bolted on.

[0050] In the configuration of the operating handle 5, the mounting configuration of the switch 50 may be as shown in Figure 16. A clutch lever 6 for operating the clutch is provided on the upper side of the left handle portion 5L of the operating handle 5. The clutch lever 6 is supported by a clutch panel 61 provided on the operating handle 5. The clutch panel 61 is a component that is fastened to the upper inside of the operating handle 5 with bolts or the like. Although not shown, the cable for the clutch lever 6 is routed below the clutch panel 61. It is desirable to fasten the cable so that it runs along the operating handle 5 to prevent it from getting tangled or moving around.

[0051] The clutch panel 61 is equipped with a switch panel 51. The switch panel 51 is fitted with a start switch 50 for starting and stopping the engine E, and has a switch mounting hole 52 below it for routing a harness 53.

[0052] In the example shown in Figures 16 and 17, the switch panel 51 is detachably attached to the side of the L-shaped clutch panel 61 using screws 54. The detachability of the switch panel 51 facilitates maintenance and parts replacement.

[0053] The switch panel 51 shown in Figure 17 is an L-shaped member and has a side surface 55. The side surface 55 is provided with mounting holes 55U.

[0054] An L-shaped bracket 56 is provided below the switch panel 51. The bracket 56 is positioned where the horizontally elongated portion 56A overlaps with the bottom surface 57 of the switch panel 51 in a plan view, and the vertically elongated portion 56B is provided with a mounting hole 56U. In Figure 17, the bottom surface 57 and the horizontally elongated portion 56A are welded together and integrated, but they may also be detachable.

[0055] The mounting hole 55U or mounting hole 56U can be aligned with the mounting hole of the clutch panel 61 and secured with screws 54. Furthermore, since the side 55 and the stay 56 have different inclination angles, the angle at which the switch panel 51 is mounted can be selected, allowing the operator to adjust it to a position that is easy to operate. Alternatively, the switch panel 51 may be connected using bolts, pins, or bands instead of screws.

[0056] Figure 19 shows a mounting configuration for a hood 4 with an alternative configuration. The pivot point S1 of the hood 4 is formed at the front of the hood mounting plate FP. A fuel tank bracket NB is provided at the rear of the hood mounting plate FP, and the fuel tank bracket NB is fixed to the engine with bolts together with the hood mounting plate FP. In addition, an L-shaped plate is provided on the fuel tank bracket NB, and it is fixed to the engine with bolts from both the left and right sides.

[0057] This makes it possible to stably support a heavy fuel tank that is full of fuel.

[0058] As shown in Figure 19, the exhaust pipe EP that discharges exhaust gas from the engine E may be configured as follows: The exhaust pipe EP is equipped with an exhaust pipe cover EC that covers the exhaust pipe EP, and a plate EL, which is a plate-shaped member, is provided to cover the space between the exhaust pipe EP and the exhaust pipe cover EC. The plate EL is directly bolted to the engine E.

[0059] The front side of plate EL is fastened to both the fuel tank bracket NB and the engine E. There may be one or more fastening holes, and if there are multiple, at least one may be fastened together.

[0060] The rear side of plate EL is fastened to both the cylinder head cover SH, which covers the cylinder section of engine E, and engine E. There may be one or more fastening holes, and if there are multiple, at least one may be fastened together.

[0061] The fastening positions on the front and rear of Plate EL are such that one is in the left-right direction and the other is generally in the up-down direction. Plate EL is designed so that the front is fastened in the left-right direction and the rear is fastened in the front-back direction.

[0062] The clamping portions on the front left and right sides of plate EL are formed by bending the plate EL body, and the clamping portions on the rear up and down sides are also formed by bending the plate EL body.

[0063] As shown in Figure 19, plate EL has a bent portion ECF formed by bending the front left side of plate EL so that it can be bolted in the front left-right direction. It also has a bent portion ECR formed by bending downwards at the rear. The bent portion ECF has a hole ECX and the bent portion ECR has a hole ECY, and it is configured to be attached to engine E by tightening bolts.

[0064] By incorporating plate EL, safety is enhanced because workers will no longer come into contact with the exhaust pipe EP and exhaust pipe cover EC, which become hot due to heat dissipation from the engine E. It also acts as a heat shield, preventing heat from the engine E from being transferred to the fuel tank N. Furthermore, since it is attached directly to the engine E body rather than to a component that vibrates due to the engine E's vibrations, damage due to vibration is less likely. [Explanation of Symbols]

[0065] 1 unit 2 running wheels 3 Mainframe 4 Food 5. Operating handle 6. Clutch lever 40 Hood Bracket 40A Front Bracket 40B Rear Bracket 40C Notch 40F Hood Bracket 40FA Front Bracket 40FB Rear Bracket 40FC notch 40FN connection holes 40HA connection hole 40HB connection holes 40HC connection hole 40L left front stay 40J top surface 40M Right front stay 40N connection hole 40R Right rear stay 40Y side view 41 Front Hood 41Z Opening / Closing Stay 42 Rear Hood 43 Rear stay 43a Nagabe 43b Short part 44 Front Stay 44a Flat part 44b Slope 44c Front part 44F Front Stay 46 Muffler Cover 46F Muffler Cover Stay 47. Stay protrusion 48 Retaining hole 49 Identification holes 50 switches 51 Switch Panel 52 switch mounting holes 53 Harness 54 screws 55 Side view 55U mounting holes 56 Stay 56A Horizontal section 56B Vertical section 56U mounting holes 57 Bottom 61 Clutch Panel BT Bolt C Cover C1 open part C2 Cover Plate CS Cover Stay CT intermediate stay D Transmission Case E-engine EC Exhaust Pipe Cover ECF bend ECR bending part ECX hole ECY Hole EL Plate K Drive unit (belt transmission mechanism) K1 Output Shaft K2 Input Axis MC Muffler Cover N Fuel Tank NB Fuel Tank Bracket NH connection hole NU long hole P1 Output Pulley P2 Input Pulley S pivot point SH Cylinder Head Cover T-tension arm TP Tension Pulley TS fulcrum V-belt

Claims

1. A walking-type cultivator comprising an engine (E) on a machine body (1), and a hood (4) above the engine (E) via a hood bracket (40), wherein the hood bracket (40) is configured to have an engagement portion with a downward-facing U-shaped cross-section and to be fitted onto the engine (E) from above, and to be fixed to the engine (E) from the left and right directions, a drive unit (K) that transmits power from the engine (E) is provided below the engine (E), the drive unit (K) is provided with a tension arm (T) that switches the power transmission on and off, a cover (C) that protects the drive unit (K) is provided on the outside of the machine body of the drive unit (K), an opening (C1) is provided below the cover (C), and the tension arm (T) is provided with a cover plate (C2) that opens and closes the opening (C1) in accordance with the movement of the tension arm (T).

2. The walking type cultivator according to claim 1, wherein a heat shield cover (46) is provided between the engine (E) and the muffler cover (MC) that covers the muffler that discharges exhaust gas from the engine (E), and the heat shield cover (46) is attached to the hood bracket (40).

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