Walking type cultivator
The walking type cultivator integrates a cover plate with a tension arm to allow maintenance without cover removal, enhancing maintainability and safety by covering the drive unit and preventing interference with tilling operations.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- ISEKI & CO LTD
- Filing Date
- 2022-04-28
- Publication Date
- 2026-07-22
Smart Images
Figure 0007893025000001 
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Figure 0007893025000003
Abstract
Description
Technical Field
[0001] The present invention relates to a transmission mechanism of a walking type management machine and a cover for covering the transmission mechanism.
Background Art
[0002] Conventionally, a walking type management machine for cultivating a field and performing operations such as ridge forming is known as in the technology disclosed in Patent Document 1.
[0003] In a conventional walking type management machine, an output shaft from an engine and an input shaft to a traveling unit or a working unit were covered with a cover.
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 above conventional walking type management machine, the state of the belt transmission mechanism cannot be confirmed with the cover attached to the machine body, and it is necessary to attach and detach the cover during inspection and lubrication.
[0006] An object of the present invention is to provide a walking type management machine provided with a transmission mechanism that ensures maintainability and safety in view of such problems of the above conventional walking type management machine.
Means for Solving the Problems
[0007] The present invention has taken the following technical means to solve the above problems.
[0008] The invention according to claim 1 is a walking type cultivator characterized in that the machine body (1) is equipped with an engine (E), a drive unit (K) below the engine (E) that transmits power from the engine (E), a tension arm (T) that switches the power transmission on and off on the drive unit (K), a cover (C) that protects the drive unit (K) on the outside of the machine body of the drive unit (K), an opening (C1) below the cover (C), a cover plate (C2) that opens and closes the opening (C1) in accordance with the movement of the tension arm (T), the cover plate (C2) is a member integrated with the tension arm (T), has three surfaces: a side surface (Ca), a front surface (Cb), and a top surface (Cc), and is integrally formed with the side surface (Ca) and the tension arm (T).
[0009] The invention according to claim 2 is a walking-type tiller according to claim 1, characterized in that the machine body (1) is equipped with a tilling device (2), a fender (F) covering the top of the tilling device (2), and the front surface (Cb) is located in front of the fender (F).
[0010] The invention according to claim 3 is a walking-type management machine according to claim 1 or 2, characterized in that the side surface (Ca) has a notch (CT) that avoids the location where the machine body (1) and the tension arm (T) are integrated.
[0011] [Effects of the Invention]
[0012] According to the present invention as described in claim 1, in addition to the fact that maintenance of the drive unit (K) is possible without removing the cover (C) by the opening (C1), when the clutch is in the "on" state, i.e., when the drive unit (K) is moving, the opening (C1) is covered with the cover plate (C2), preventing the operator from touching the drive unit (K), thereby improving maintainability and safety, and because the tension arm (T) and the cover plate (C2) are integrated, it can be installed without changing the configuration of the machine body (1).
[0013] According to the present invention described in claim 2, since the cover plate (C2) is positioned in front of the fender (F), even if the cover plate (C2) rotates as the tension arm (T) rotates, the cover plate (C2) and the fender (F) do not come into contact with each other, so it does not interfere with the tilling operation.
[0014] According to the present invention described in claim 3, since it is attached avoiding the position where the machine body (1) and the tension arm (T) are integrated, the cover plate (C2) can also be attached without affecting the attachment of the tension arm (T).
[0015]
Brief Description of the Drawings
[0016] [Figure 1] Perspective view of the walking type management machine of the present invention. [Figure 2] Side view of the drive unit of the walking type management machine of the present invention. [Figure 3] Side view of the drive unit of the walking type management machine of the present invention. [Figure 4] Side view of the drive unit of the walking type management machine of the present invention. [Figure 5] Plan view of the tension arm of the walking type management machine of the present invention. [Figure 6] Side view of the tension arm of the walking type management machine of the present invention. [Figure 7] Side view of the cover plate of the walking type management machine of the present invention. [Figure 8] Side view of the tension arm and the cover plate of the walking type management machine of the present invention. [Figure 9] Side view 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] Plan view of the hood bracket of the walking type management machine of the present invention. [Figure 12] Side view of the walking type management machine of the present invention. [Figure 13] Plan view of the hood of the walking type management machine of the present invention. [Figure 14] Perspective view of the main part of the walking-type management machine of the present invention. [Figure 15] Perspective view of the main part of the walking-type management machine of the present invention. [Figure 16] Perspective view of the main part of the walking-type management machine of the present invention. [Figure 17] Perspective view of the main part of the walking-type management machine of the present invention. [Figure 18] Perspective view of the mission oil filling port of the walking-type management machine of the present invention.
Mode for Carrying Out the Invention
[0017] Hereinafter, the present invention will be specifically described with respect to the configuration and operation of the basic configuration of the machine body 1 of the walking-type management work machine, which is one embodiment.
[0018] In the description of the embodiments, the left and right directions are referred to as left and right, respectively, in the forward direction of the machine body 1, and the forward direction is referred to as front and the backward direction is referred to as rear. However, the configuration of the present invention is not limited thereto.
[0019] The configuration of the machine body 1 will be described based on FIG. 1.
[0020] The machine body 1 of the walking-type management machine includes a machine body frame 3, an engine E and the like are provided on the machine body frame 3, a transmission case D for transmitting the drive of the engine E to each part is provided below the engine E, and a tilling device 2 is provided below the transmission case D. Near the engine E, a fuel tank N for supplying fuel to the engine E is provided, a hood 4 for covering the engine E and the like from above is provided, and the hood 4 is provided with a fuel gauge for checking the remaining amount of fuel in the fuel tank N and a fuel filling part NO for filling fuel into the fuel tank N.
[0021] On the upper part of the transmission case D, an operation handle 5 for an operator to operate the machine body 1 is provided. More specifically, a handle frame H for attaching the operation handle 5 to the machine body 1 is attached to the upper part of the transmission case D, and the operation handle 5 is attached to the upper part of the handle frame H. The operation handle 5 is provided with an operation device such as a clutch lever 6 related to the operation of the machine body 1.
[0022] 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, the power is shifted within the transmission case D and transmitted to the tilling device 2. The drive unit K is part of the transmission unit, and the transmission case D is located below the drive unit K.
[0023] The details of the drive unit K (hereinafter referred to as the belt drive mechanism K) mentioned above will now be explained. As shown in Figures 2 to 4, the belt drive mechanism K, which transmits the power of the engine E to the running wheels 2, etc., is equipped with 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.
[0024] 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 K is equipped with a tension arm T.
[0025] The tension arm T is a crank-shaped member, as shown in Figures 2 to 5.
[0026] The tension arm T has three surfaces: an inner surface Ta attached to the aircraft body 1, an outer surface Tb located outside and in front of the aircraft body 1 relative to the inner surface Ta, and an intermediate surface Tc which is a bent intermediate section extending from the front of the inner surface Ta and the rear of the outer surface Tb.
[0027] The tension arm T is connected to a clutch cable section 60 that extends and retracts in response to the operation of the clutch lever 6. More specifically, as shown in Figure 4, the clutch cable section 60 consists of a cable 61 extending downward from the clutch lever 6 to the machine body 1, a wire 62 extending downward from near the belt transmission mechanism K, a spring 63 that extends and retracts in response to the operation of the clutch lever 6, and a hook 64 that is attached to the tension arm T.
[0028] The intermediate surface Tc of the tension arm T is provided with a hole Ti into which a hook 64 fits. This allows the tension arm T to rotate when the clutch lever 6 is operated.
[0029] Near the belt transmission mechanism K, there is a limit switch 55 that switches the power supply state of the start switch 50 of the machine 1.
[0030] The limit switch 55 detects the "on" and "off" states of the clutch and switches the power supply accordingly. When the tension arm T rotates due to the operation of the clutch lever 6, the limit switch 55 is switched on or off.
[0031] In detail, it includes a limit wire section 51 that is linked to the tension arm T, and the limit wire section 51 consists of a spring 52 that expands and contracts with the rotation of the tension arm T, a hook 53 that can be attached to the tension arm T, and a limit plate 54 that switches the power on and off of the limit switch 55.
[0032] The inner surface Ta of the tension arm T is provided with a hole Tj into which the hook 53 fits. As a result, when the tension arm T rotates, the limit wire section 51 extends and retracts, and the energized state of the start switch 50 can be switched depending on whether or not the limit plate 54 is in contact with the limit switch 55.
[0033] With the electric start switch 50, the engine cannot be started when the power is off, thus preventing sudden acceleration caused by starting the engine with the clutch engaged.
[0034] The tension arm T is provided with a hole Th into which a pivot point TS, which serves as the pivot point, is inserted, and a hole Tg into which a tension pin TN, to which the tension pulley TP is attached, is inserted.
[0035] Hole Tg is located on the outer surface Tb, holes Th and Tj are located on the inner surface Ta, and hole Ti is located on the intermediate surface Tc.
[0036] The tension arm T rotates vertically around the pivot point TS by operating the clutch lever 6. When it rotates upward, the tension pulley TP pushes up the belt V, transmitting power to the input shaft K2.
[0037] The belt drive mechanism K is covered from the outside of the machine by a cover C to prevent workers from accidentally touching the belt drive mechanism K. As shown in Figures 2 to 4, an opening C1 for maintenance work is provided below the cover C. Figure 2 shows the clutch in the "disengaged" state, and Figure 4 shows the clutch in the "engaged" state. As shown in Figure 8, the tension arm T is equipped with an L-shaped plate, a cover plate C2, which follows the movement of the tension arm T.
[0038] More specifically, as shown in Figure 5, the cover plate C2 is a component with three surfaces. The following expressions will be used in the description of the cover plate C2.
[0039] The forward / backward direction of the aircraft is defined as the X direction, the up / down direction as the Y direction, and the left / right direction as the Z direction.
[0040] The cover plate C2 consists of a side surface Ca, which has edges in the X and Y directions; a front surface Cb, which has edges in the Y and Z directions; and a top surface Cc, which has edges in the X and Z directions.
[0041] The side surface Ca is the surface extending upward from the left side of the upper surface Cc, and is welded to the tension arm T.
[0042] The front surface Cb is the surface extending downward from the front edge of the upper surface Cc, and when the clutch is "disengaged," it is located in front of the fender F, which is an exterior component covering the tilling device 2. In other words, even when the cover plate C2 rotates following the tension arm T, it does not interfere with the fender F. More specifically, when the clutch is "disengaged," the front surface Cb is located in front of and below the fender F, and when the clutch is "engaged," it is located in front of and above the fender F.
[0043] Furthermore, the side surface Ca is shaped to include a notched section CT.
[0044] The notch CT is provided so as not to come into contact with the tension pin TN and weld bead, etc., which are welded to integrate the tension arm T with the machine body 1. If the notch CT is not provided, a hole is made in the side Ca, and the tension pin TN is inserted in the same way as the hole Tg, and connected to the tension arm T.
[0045] When the tension arm T moves upward and the clutch is in the "engaged" position, the cover plate C2 covers the open section C1. This configuration allows the open section C1 to be covered when the clutch is in the "engaged" position, improving safety, and also allows maintenance work when the clutch is in the "disengaged" position. Ideally, the cover plate C2 should be welded to the inside of the tension arm T, but it may also be detachable.
[0046] In Figures 4, 7, and 8, the cover plate C2 is a component with three faces, but it may have a different shape. For example, it may have a rear face Cb that shares an edge with the rear edge of the side surface Ca and the rear edge of the top surface Cc, and has edges in the Y and Z directions.
[0047] The invention relating to the configuration around engine E will be described below.
[0048] As shown in Figure 9, the top of engine E is covered by a hood 4F (different from the airframe 1 and its hood 4 in Figure 1). The hood 4F is attached to the top of engine E by a hood bracket 40, which is an attachment member to engine E. The hood bracket 40 is attached to the top of engine E and secured with bolts.
[0049] The hood bracket 40 is a crank-shaped member and consists of a front bracket 40A located in front of the bent portion 40D and a rear bracket 40B located behind the bent portion 40D.
[0050] As shown in Figure 10, the hood bracket 40 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 46, which are integrated by welding to the hood bracket 40.
[0051] Furthermore, the front side of the front bracket 40 is provided with a notch 40C, and the notch 40C is provided with a stay projection 47. The tip of the stay projection 47 protrudes forward from the front end of the front bracket 40A.
[0052] Furthermore, the rear bracket 40B has a connection hole 40N at its rear end for connecting to the fuel tank bracket NB. The connection hole 40N of the rear bracket 40B and the connection hole NH on the fuel tank bracket NB are aligned and fastened together 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.
[0053] As shown in Figure 11, the front stay 44F is mounted on the front bracket 40A. The front stay 44F is a concave-shaped member, and its front end protrudes forward from the front end of the front bracket 40A.
[0054] 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.
[0055] 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 4F and hood bracket 40 can be suppressed.
[0056] The hood bracket 40 is provided with fastening holes 48 through which harnesses and other fasteners 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 front stay 44F, on the upper surface of the left front stay 40L, on the right front stay 40M, on the upper front right surface of the right rear stay 40R, on the upper rear right surface of the right rear stay 40R, on the upper front right surface of the rear bracket 40B, on the upper rear right surface of the rear bracket 40B, or in any combination thereof.
[0057] The rear bracket 40B 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.
[0058] 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.
[0059] 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.
[0060] Furthermore, the mounting configuration of the hood to the aircraft may be as follows. Note that, in the following configuration, since it is a different form from the aircraft as described above, the hood covering the top of engine E will be called hood 4i.
[0061] As shown in Figures 12 to 17, the hood 4i consists of a front hood 4ia that covers the top of the engine E, a tank hood 4ib that covers the fuel tank Ni from above, and a rear hood 4ic that covers the fuel tank Ni and other components from the rear of the aircraft.
[0062] The hood 4i is attached to the top of the engine E by a mounting component, the hood bracket 40i. The hood bracket 40i is attached to the top of the engine E and secured with bolts.
[0063] A heat shield cover 46i is provided on the left side of the hood bracket 40i. The heat shield cover 46i is provided between the muffler cover MCi, which covers the muffler that discharges exhaust gases from the engine E to the outside of the vehicle, and the engine E. It is desirable that the heat shield cover 46i be integrated with the hood bracket 40i by welding, with the right end of the heat shield cover 46i and the left end of the hood bracket 40i overlapping.
[0064] Furthermore, a fuel tank bracket NBi is provided on the rear side of the hood bracket 40i, and the fuel tank Ni is bolted to the connection hole 40Ni in which the fuel tank bracket NBi is provided.
[0065] The heat shield cover 46i can cover the area between the hot engine E and the muffler cover MCi, preventing accidental contact by workers and preventing the hood bracket 40i from becoming hot, thereby improving safety.
[0066] The hood bracket 40i is provided with positioning adjustment holes 45i to allow adjustment of the mounting position of the hood 4i relative to the engine E.
[0067] The adjustment hole 45i may be an elongated hole in the front-to-back direction, or an elongated hole in the left-to-right direction. Furthermore, it may be configured with multiple holes in the front-to-back direction, left-to-right direction, or both directions. This allows for adjustment.
[0068] The adjustment hole 45i may be located in front of or behind the bracket mounting portion 4iaf on the front hood 4ia side, or it may be located in both.
[0069] The front hood 4ia can be secured by hooking it onto the front stay 44i, which is located on the hood bracket 40i side. More specifically, the bracket mounting part 4iaf has a gap into which the front stay 44i fits, and the hood 4i is secured by inserting the front stay 44i into the gap.
[0070] The front stay 44i is welded together with the hood bracket 4i and the heat shield cover 46i, forming a single integrated unit.
[0071] The muffler cover MCi is bolted to the hood bracket 40i. The heat shield cover 46i is bolted to the hood bracket 40i at either the front or rear, or both.
[0072] In the example shown in Figure 14, the front fasteners are bolted from above, and the rear fasteners are bolted from the left and right. The muffler cover MCi is equipped with a stay with holes for connecting to the hood bracket 40i. The front of the muffler cover MCi is equipped with a muffler cover mounting stay MSF, and the rear is equipped with a muffler cover mounting stay MSR.
[0073] As shown in Figures 14 and 15, the rear fuel tank mounting bracket NiS is attached to the rear of the fuel tank Ni. The side fuel tank mounting portion NiY is positioned in front of the fuel tank cap NiC in a side view.
[0074] The rear fuel tank mounting bracket NiS is attached to the handle frame H and then to the aircraft body. The rear fuel tank mounting bracket NiS is attached to the fuel tank mounting plate HN, which is welded and integrated with the handle frame H. The fuel tank mounting plate HN is L-shaped.
[0075] As shown in Figure 16, the handle frame H is attached to the machine by bolting the handle frame side connection hole HO to the transmission case D.
[0076] As shown in Figures 14 and 17, a cable stay 65 is connected to the inside of the rear hood 4ic. The cable stay 65 supports the cable extending from the clutch lever 6i to the belt transmission mechanism K and is attached to the transmission case D.
[0077] The configuration for injecting transmission oil into transmission case D is as follows:
[0078] Figure 18 shows a simplified configuration of the transmission case D and the transmission oil supply section (parts other than the transmission oil supply section of the present invention are omitted).
[0079] The transmission case D is equipped with a transmission oil supply section 70 for injecting transmission oil into the transmission case D. The transmission oil supply section 70 consists of a transmission oil filler port 71, a transmission oil cap 72 for closing the transmission oil filler port 71, a supply pipe 73 that has a longer diameter than the transmission oil cap 7 and is equipped with a transmission oil filler port, and a protrusion 74 that provides a step between the transmission case D and the supply pipe 73.
[0080] The transmission oil cap 72 can be either a push-in type or a screw-on type.
[0081] The protrusion 74 may be circular, elliptical, square, or any other shape. A rib may also be provided on the lower side of the protrusion 74. Multiple protrusions 74 may be provided to create a stepped appearance. The protrusion 74 makes it easier to check changes in the oil level, improving maintenance workability. [Explanation of Symbols]
[0082] 1 unit 2 Tillage equipment 3. Aircraft Frame 4 Food 4F Food 4i Hood 4ia front hood 4ib Tank Hood 4ic Rear Hood 4iaf bracket mounting section 5. Operating handle 6. Clutch lever 6i Clutch Lever 40 Hood Bracket 40A Front Bracket 40B Rear Bracket 40C Notch 40D bending part 40i Hood Bracket 40L left front stay 40M Right front stay 40N connection hole 40Ni connection hole 40R Right rear stay 44F Front Stay 44H Folding hole 44i Front Stay 45i adjustment hole 46 Heat shield cover stay 46i Heat Shield Cover 47. Stay protrusion 48 Retaining hole 49 Identification holes 50 Start switch 51 Limit wire section 52 Springs 53 hooks 54 Limit Plate 55 Limit Switch 60 Clutch cable section 61 Cables 62 wires 63 Spring 64 hooks 65 Cable stay 70 Transmission oil filler section 71 Transmission oil filler cap 72 Transmission oil cap 73 Fueling cylinder 74 Convex part C Cover C1 open part C2 Cover Plate Ca side Cb front Cc top surface CT notch D Transmission Case E-engine F Fender H Handle Frame HN Fuel Tank Mounting Plate HO Handle frame side connection hole K Drive unit (belt transmission mechanism) K1 Output Shaft K2 Input Axis MCi Muffler Cover MSF Muffler Cover Mounting Bracket (Front) MSR muffler cover mounting bracket N Fuel Tank Ni fuel tank NiS fuel tank rear mounting bracket NiC Fuel Tank Cap NiY fuel tank side mounting section NB Fuel Tank Bracket NBi Fuel Tank Bracket NH connection hole NO Fueling Department P1 Output Pulley P2 Input Pulley T-tension arm Ta inner surface Tb outer surface Tc intermediate plane Tg hole Th hole Ti hole Tj hole Tube tension pin TS fulcrum TP Tension Pulley V-belt
Claims
1. A walking-type cultivator characterized in that the machine body (1) is equipped with an engine (E), a drive unit (K) below the engine (E) that transmits power from the engine (E), a tension arm (T) that switches the power transmission on and off on the drive unit (K), a cover (C) that protects the drive unit (K) on the outside of the machine body of the drive unit (K), an opening (C1) below the cover (C), a cover plate (C2) that opens and closes the opening (C1) in accordance with the movement of the tension arm (T), the cover plate (C2) is an integral member with the tension arm (T), has three surfaces: a side (Ca), a front (Cb), and a top (Cc), and is integrally formed with the side (Ca) and the tension arm (T).
2. The walking-type tiller according to claim 1, characterized in that the machine body (1) is equipped with a tilling device (2), a fender (F) covering the top of the tilling device (2), and the front surface (Cb) is located in front of the fender (F).
3. The walking-type cultivator according to claim 1 or 2, characterized in that the side surface (Ca) is provided with a notch (CT) that avoids the location where the machine body (1) and the tension arm (T) are integrated.