JP2010071455A - Damping support - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a damping support of a simple shape allowing easy replacement of damping means while securing further durability and good drivability by raising the stability of an engine action. <P>SOLUTION: The damping support 30 includes a frame side mount 31 attached to a frame 2 of a working vehicle 1, etc., an engine side mount 32 attached to an engine side and the damping means 33 interposed between the frame side mount 31 and the engine side mount 32, and further includes front-back stoppers 31b, 31b formed on both front and back sides of the frame side mount 31 and front-back tensile stoppers 38, 38 formed by integrating the front-back stoppers and tensile stoppers on both front and back sides of the engine mount 32. Notch parts 39, 40 of an approximately U shape are formed in the frame side mount 31 and the engine side mount 32 to allow easy installation/removal of the damping means 33 alone. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an anti-vibration support device for mounting an engine.

Conventionally, when an engine is mounted on a frame of an automobile, a work vehicle, or the like, it is known to provide a support device using vibration isolation means so that vibration generated from the engine or transmission is not transmitted to the cockpit or the like. This not only protects the driver from vibrations and noise caused by vibrations, but also avoids damage to peripheral equipment due to vibrations. A spring or the like is used. In addition, in order to prevent interference between the engine and peripheral parts due to engine vibration, there has been a restriction on the amount of displacement so that the vibration isolation means does not deform beyond a certain level (see, for example, Patent Document 1). .)
JP 2005-263046 A

  In the case of a work vehicle such as a construction machine or an agricultural machine, the operating state of the engine mounted varies greatly depending on the work content, such as suddenly changing from a low rotation, low output operation to a high rotation, high output operation. For this reason, there are concerns about the durability of the frame and other peripheral devices due to the vibration of the engine and transmission, and if the vibration is transmitted to the cockpit, the vibration itself and the noise caused by the vibration may impose a heavy burden on the operator. For this reason, there was a case where the frame was supported by vibration isolation. However, anti-vibration support devices using anti-vibration rubber need to assume all vibration modes of the engine, and in order to prevent interference between the engine and peripheral parts, it is necessary to provide multiple stoppers that limit the displacement due to engine vibration It was complicated. Furthermore, if the vibration isolating means deteriorates, it cannot play the role of the vibration isolating support device, and it takes a lot of time and money to replace the vibration isolating means. On the other hand, in many work vehicles, the user himself performs the maintenance, and thus a structure capable of easily exchanging the vibration isolating means even at a simple maintenance place is required.

  Accordingly, the present invention provides an anti-vibration support device capable of improving the stability of engine behavior while maintaining a simple shape, ensuring further durability and good drivability, and easily replacing the anti-vibration means. The purpose is to provide.

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

  That is, according to the first aspect of the present invention, there is provided an anti-vibration support device comprising a frame-side mount attached to a frame of a work vehicle, an engine-side mount attached to the engine, and an anti-vibration means interposed between the frame-side mount and the engine-side mount. The front and rear stoppers are formed on both front and rear sides of the frame side mount, and the front and rear tension stoppers are integrally provided on the front and rear sides of the engine side mount.

  According to a second aspect of the present invention, the front and rear tension stoppers are integrally formed by press working on both front and rear sides of the engine side mount.

  According to a third aspect of the present invention, the frame-side mount and the engine-side mount are provided with notches for attaching and detaching vibration isolation means.

  As effects of the present invention, the following effects can be obtained.

  According to the first aspect of the present invention, it is possible to provide a simple and inexpensive anti-vibration support device. Further, since the tension stoppers are provided on both the front and rear sides, it is possible to improve the stability of the engine behavior and ensure further durability and good drivability. Further, since the anti-vibration support device has a symmetrical structure, the same anti-vibration support device can be used on the left and right sides of the engine, and management and assembly man-hours can be reduced.

  According to the second aspect of the present invention, the vibration isolating support device can be further simplified and inexpensive, and since there is no welded portion, the accuracy of the product can be improved, and the stability and corrosion can be improved. Durability concerns can also be reduced.

  According to the third aspect of the present invention, since the sub-assembly process for assembling the vibration isolating support device is not required, the productivity is improved, and only the vibration isolating means can be easily used for maintenance and the like without loading and unloading the engine. Can be replaced.

  Next, embodiments of the invention will be described.

  First, the overall configuration of the work vehicle 1 according to an embodiment will be described. The work vehicle in FIG. 1 will be described with the direction of arrow A as the traveling direction.

  As shown in FIG. 1, the work vehicle 1 is an Ackermann-steered lawn mower, and is supported by a frame 2, a rear axle drive device 3 supported on the rear portion of the frame 2, and a front portion of the frame 2. A front axle support device 4, an engine 50 supported by an anti-vibration support device 30 above the front axle support device 4, and a mower 5 hung up and down below the center of the frame 2. Yes.

  The engine 50 is housed in the bonnet 7, a handle 8 is disposed on the rear upper side from the dashboard immediately after the bonnet 7, and a radiator 9 is disposed above the frame 2 immediately before the engine 50. ing.

  Further, a rear cover 11 is disposed at the rear of the frame 2, and a driver seat 12 is disposed above the rear cover 11. In the rear cover 11, the rear axle drive device 3 is disposed.

  The mower 5 is disposed below the frame 2 between the rear wheel 13 driven by the rear axle drive device 3 and the front wheel 14 supported by the front axle support device 4. A mower hanger 15 is connected to the front end portion of the frame 2, and the mower hanger 15 is connected to the front end of the mower 5 via a link rod 16 so that it can be lifted and lowered. ing.

  Next, the configuration of the engine 50 will be described with reference to FIGS.

  The cooling fan 51 of the engine 50 is supported by a drive shaft 53a of a coolant pump 53 attached to the cylinder block 52, and the drive shaft 53a is connected to a crankshaft 54 protruding from the cylinder block 52 via a pulley 55 and a belt 56. It can be rotated by interlocking connection. A flywheel 57 is fixed to the other end of the crankshaft 54 so that the crankshaft 54 rotates smoothly.

  An intake path 59 and an exhaust path 60 are attached to a cylinder head 58 fixed to the upper part of the cylinder block 52 of the engine 50, and an oil pan 61 is fixed to the lower part of the cylinder block 52, so that lubricating oil can be supplied. Contained. A gear case 63 in which a lubricating oil pump (not shown) for supplying the lubricating oil to each part of the engine 50 and a gear 62 for driving a fuel injection pump described later is housed is a cooling fan 51 side of the cylinder block 52. Installed on the side of the.

  The fuel injection pump 64 is disposed on the side of the cylinder block 52 and below the intake passage 59, and the drive shaft 64 a of the fuel injection pump 64 is fastened to the gear 62. The fuel injection pump 64 can be attached and detached for maintenance or the like by removing the gear case cover 63a provided on the gear case 63 and releasing the connection between the fuel injection pump 64 and the gear 62.

  In order to supply fuel to the engine 50, a pipe (not shown) is communicated from a fuel tank (not shown) to the fuel injection pump, and in order to remove impurities such as sand mixed in the fuel, the fuel injection pump A fuel filter 65 is provided upstream. As shown in FIG. 2, the fuel filter 65 has a part of the gear case cover 63a extending laterally, and the extending part is bent rearward (flywheel 57 side) to form a mounting part 63b. The fuel filter 65 is attached to the attachment portion 63b. With this configuration, the filter mounting bracket and the gear case cover 63a are integrally configured, and the number of parts is reduced, thereby reducing the cost.

  As shown in FIG. 3, the engine 50 is mounted on the frame 2 by vibration-proof support devices 30 mounted on the left and right of the engine 50, and is mounted on the frame side mount 31 attached to the frame 2 and the engine. The engine-side mount 32 is composed of an anti-vibration means 33 that is interposed between the engine-side mount 32 and absorbs vibration. Naturally, the vibration generated from the engine 50 also changes depending on the number of cylinders of the engine 50 and the operating condition, so that the vibration isolation means 33 having an optimal vibration transmission rate is selected.

  Next, a conventional anti-vibration support structure will be described.

  As shown in FIG. 4, the frame side mount 310, the engine side mount 320, and the vibration isolation means 330 are mainly configured. In the conventional example, the bracket 340 is fixedly connected to the frame side mount 310, and the bolt 350 inserted through the bolt hole provided in the bracket 340 is fixed horizontally with two nuts arranged so as to sandwich the bracket 340 therebetween. Has been.

  Thereby, the gap between the engine side mount 320 and the bolt 350 can be adjusted as appropriate, and when the engine 50 vibrates greatly, the top of the bolt 350 and the engine side mount 320 come into contact with each other, and the vibration isolating means 330. The amount of displacement due to vibration is limited so that deformation beyond a certain level does not occur. In this conventional example, only the amount of displacement in the horizontal direction can be limited.

  Next, the anti-vibration support device 30 according to the present invention will be described with reference to FIG.

  Since the anti-vibration support device 30 is symmetrically arranged on both the left and right sides of the engine, only the left and right sides will be described.

  The anti-vibration support device 30 includes a frame-side mount 31, an engine-side mount 32, anti-vibration means 33, and a front / rear tension stopper 38. However, in the present embodiment, two anti-vibration means 33 are attached. However, one or three or more anti-vibration means 33 may be attached.

  The frame side mount 31 is bent downward according to the shape and angle of the frame 2 and fixed to the frame 2 by bolts or welding. The front and rear sides of the vibration isolation means attachment portion 31a of the frame side mount 31 are bent vertically upward to constitute front and rear stoppers 31b and 31b.

  The engine-side mount 32 is arranged so as to face the frame-side mount 31, and a bolt hole of a tension bolt 33a for fixing the vibration isolating means 33 is provided in the vibration isolating means attaching portion 32a. Further, front and rear tension stoppers 38 and 38 formed in a substantially L shape in side view are fixedly provided on both front and rear sides of the engine side mount 32, and the vertical portions of the front and rear tension stoppers 38 and 38 are disposed outside the front and rear stoppers 31b. The other side which is extended in parallel with an appropriate gap and bent in the horizontal direction is extended in parallel with an appropriate gap below the front and rear sides of the anti-vibration means mounting portion 31a of the frame side mount 31. Thus, the front and rear stoppers and the tension stoppers are combined. Therefore, when the engine 50 vibrates greatly in the front-rear direction, the outer surface of the front-rear stopper 31b and the inner surface of the front-rear tension stopper 38 come into contact with each other, and the vibration displacement means 33 is not deformed beyond a certain level. When the amount is limited and the engine 50 vibrates greatly in the pulling direction, the front / rear tension stopper 38 comes into contact with the lower surface of the vibration isolating means mounting portion 31a of the frame side mount 31 and the vibration isolating means 33 is more than a certain level. The amount of displacement due to vibration is limited so that deformation does not occur.

  The anti-vibration means 33 is composed of a tension bolt 33a, an anti-vibration rubber 33b, a washer 33c, and a collar 33d, and a pipe-like collar 33d is inserted inside the anti-vibration rubber 33b formed in a cylindrical shape. A washer 33c is vulcanized and bonded to both ends of the anti-vibration rubber 33b, and a tension bolt 33a is fixedly provided so that the collar 33d and the washer 33c communicate with each other. The amount of pressure applied to the anti-vibration rubber 33b can be changed depending on the length of the collar 33d as well as the hardness of the anti-vibration rubber 33b, and is selected according to the engine 50, the work vehicle 1, and the like. The anti-vibration rubber 33b may be formed of a uniform material or may be filled with a liquid. However, in the present invention, the shape of the anti-vibration rubber 33b is of course as well as the rubber material, hardness, internal structure, and the like. There is no limitation to the above.

  The vibration isolation means 33 is fixed by a nut by inserting a tension bolt 33a through a bolt hole provided in the frame side mount 31 and a bolt hole provided in the engine side mount 32. That is, the vibration isolating means 33 is interposed between the frame side mount 31 and the engine side mount 32.

  Thereby, it can be set as the anti-vibration support apparatus 30 simple and cheap. Further, by providing the tension stoppers on both the front and rear sides, it is possible to improve the stability of the behavior of the engine 50 and to ensure further durability and good drivability. Further, since the anti-vibration support device 30 has a front-rear control structure, the same anti-vibration support device 30 can be used on the left and right of the engine 50, and management and assembly man-hours can be reduced.

  Next, another embodiment of the image stabilization support device 30 will be described with reference to FIG. In the following embodiments, the same reference numerals are given to the configurations already described, the specific description thereof is omitted, and different portions will be described.

The frame-side mount 31 is configured in substantially the same manner as before, but both the front and rear sides of the vibration-isolating means attaching portion 31a of the frame-side mount 31 are bent vertically upward so that the anti-vibration means attaching portion of the engine-side mount 32 is provided. The front and rear stoppers 31b and 31b are configured to extend to a height where an appropriate gap is provided between the lower surface of 32a.
With this configuration, when a compression load is applied to the vibration isolating means 33, the front and rear stoppers 31 b and 31 b abut against the lower surface of the vibration isolating means mounting portion 32 a of the engine side mount 32. A function as a compression stopper that limits the amount of displacement due to vibration can be provided so that deformation beyond a certain level does not occur. Of course, it also serves as a front-rear direction stopper as described above.

  The engine side mount 32 is extended in both the front and rear directions of the vibration isolation means mounting portion 32a, and is parallel to the front and rear stoppers 31b and 31b formed on the frame side mount 31 with an appropriate gap on both front and rear sides. The front and rear stopper portions 32b and 32b are formed by bending downward. In this way, when it vibrates greatly in the front-rear direction, it can come into contact with the front-rear stoppers 31b and 31b. Further, at the lower ends of the stopper portions 32b and 32b, the tension stopper portions 32c and 32c are bent inward and spaced in parallel to the lower surface of the vibration isolating means mounting portion 31a of the frame side mount 31 in parallel. Is forming. That is, like the front / rear tension stopper 38, the front / rear stoppers 31b, 31b and the tensile stopper portions 32c, 32c are integrally formed on the front and rear sides of the engine-side mount 32 by pressing.

  As a result, the vibration isolating support device 30 can be further simplified and inexpensive, and since there is no welded portion, the accuracy of the product can be improved, and the stability, corrosion, and durability can be reduced. .

  Further, as shown in FIG. 7, the frame-side mount 31 and the engine-side mount 32 constituting the vibration-proof support device 30 are notched in a substantially U shape in place of the bolt holes used for fixing the vibration-proof means 33. 40 is provided, and the tension bolt 33a of the vibration isolating means 33 is fitted and fixed thereto, whereby only the vibration isolating means 33 can be easily detached. That is, the notch 39 is formed by opening a bolt hole of a tension bolt 33 a provided in the vibration isolating means mounting portion 32 a of the engine side mount 32 to the side. A bolt hole of a tension bolt 33a provided in the vibration means mounting portion 31a is formed by opening in the same direction as the notch 39, and the vibration isolation means can be easily removed by removing a nut for fixing the vibration isolation means 33. It is possible to detach the 33 by sliding it perpendicularly to the axial direction of the tension bolt 33a. Further, the tension bolt 33a is locked to the notch 40 by removing the nut that is fixed to the vibration isolation means mounting portion 32a of the engine side mount 32 and loosening the nut that is fixed to the vibration isolation means attachment portion 31a of the frame side mount 31. It can be defeated sideways.

  As a result, the frame side mount 31 can be attached to the frame 2, the engine side mount 32 can be attached to the engine 50, and then the vibration isolating means 33 can be interposed. Since a sub-assembly process of a certain vibration isolating support device 30 is not required, productivity can be improved, and the vibration isolating means 33 can be easily detached without loading and unloading the engine 50 during maintenance or the like. Can be improved and maintainability can be improved.

  That is, even when it is necessary to replace the vibration isolating means 33 during production assembly or maintenance, the engine 50 is lifted or lifted to such an extent that no load is applied to the vibration isolating means 33, and the vibration isolating means. The anti-vibration means 33 can be easily removed and replaced simply by removing the nuts fixing the 33 to the frame-side mount 31 and the engine-side mount 32 and sliding them vertically to the axial direction of the tension bolt 33a. Is possible.

Schematic which shows the whole structure of the working vehicle which concerns on one Embodiment. The perspective view which shows the structure of an engine. The front view which shows the engine support structure of the working vehicle which concerns on one Embodiment. The front view which shows the anti-vibration support apparatus of the conventional engine. The perspective view which shows the vibration isolating support apparatus of the engine provided with the front-back tension stopper. The perspective view which shows the anti-vibration support apparatus of the engine which comprised the front-and-back stopper and the tension | stop stopper integrally in the engine side mount. The perspective view which shows the anti-vibration support apparatus of the engine which makes it possible to attach or detach an anti-vibration means easily.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Work vehicle 2 Frame 30 Anti-vibration support apparatus 31 Frame side mount 32 Engine side mount 33 Anti-vibration means 38 Front and rear tension stopper 50 Engine

Claims (3)

  In a support structure for mounting an engine on a frame, a frame-side mount attached to the frame, an engine-side mount attached to the engine, and a vibration-proof support device having vibration-proof means interposed between the frame-side mount and the engine-side mount. An engine comprising: front and rear stoppers formed on both front and rear sides of the frame side mount; and a front and rear tension stopper integrally configured with the front and rear stoppers and a tension stopper on both front and rear sides of the engine side mount. Anti-vibration support device.   The anti-vibration support device according to claim 1, wherein the front and rear tension stoppers are integrally formed by pressing on both front and rear sides of the engine side mount.   3. The anti-vibration support device according to claim 1, wherein the frame-side mount and the engine-side mount are provided with notches for attaching / detaching anti-vibration means.

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