JPH0243781Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a transmission cover structure for covering a transmission case in a working vehicle such as an agricultural tractor.

[Problems to be solved by the prior art and the invention] In general, in this type of work vehicle, the front half of the transmission case is covered with a step section disposed on the top surface, and the rear half of the transmission case is covered with a step section disposed on the upper surface. In some cases, the part is higher than the step part and is exposed upward from the step part. In such a device, if you want to use a transmission cover to cover the rear half of the transmission case that is higher than the step section, simply place the transmission cover over the transmission case and cover the lower edge of the transmission case with the step section. If the lower edge of the transmission cover is easily stepped on or gets caught by the operator, it will easily come off, roll over, or become unreliable, and this will interfere with foot operation. There are drawbacks such as: Therefore, conventionally, appropriate metal fittings are used to secure the lower edge of the transmission cover so that it does not come off, but in this case, a separate fixing metal fitting is not necessary, and troublesome fixing work is required each time. It had the disadvantage of becoming complicated over time, which was becoming a problem in any case.

[Means for Solving the Problem] The present invention was created in view of the above-mentioned circumstances with the purpose of providing a transmission cover structure for a work vehicle that can eliminate these drawbacks. A work vehicle configured such that the front half of the transmission case is covered by a step section disposed on the upper surface, and the rear half of the transmission case is raised higher than the step section and exposed upward from the step section. A transmission cover that covers the rear half of the transmission case from above is formed of a rubber elastic material, and a flange extending in the horizontal direction is formed at the lower edge of the transmission case cover. The tsuba,
The device is characterized in that it is supported by being sandwiched between the front half of the transmission case and the step portion.

With this configuration, the present invention allows the lower edge of the mission cover to be reliably attached without using any special fixing fittings.

[Example] Next, an example of the present invention will be described based on the drawings. In the drawing, 1 is a running body of an agricultural tractor, and power from an engine 3 housed in a bonnet 2 of the running body 1 is transmitted through a clutch housing 4, a front transmission case 5, and then to a rear transmission case. The power is transmitted through a power transmission system extending from 6 to 6, and the power is output from there to drive wheels, a power take-off shaft, etc., as in the conventional art.

Reference numeral 7 denotes a fender step in which a step portion 7a and a fender portion 7b are integrally molded from a resin material such as glass fiber reinforced plastics (FRP). An opening 9a through which the seat bracket 9 fixed to the seat bracket 9 is inserted, an opening 6a through which the rear transmission case 6 which rises upward from the rear end position of the step portion 7a faces, and an opening 7c through which various operating levers (not shown) are inserted, respectively. In addition, there is a brake pedal 1 on the front edge.
0, a notch 7d is formed in which the clutch pedal 10a is placed, respectively.

Further, 11 is a rear stay that is integrally fixed to the upper surface of the hydraulic case 8 so that both ends thereof protrude in the left-right direction, and 12 is a rear stay that extends outward from both left and right sides of the front transmission case 5. This is a fixed front stay, and 13 is made to protrude from both left and right side surfaces of the clutch housing 4, and is bent into a substantially L-shape so that its tip is integrally fixed to the tip of the stay 12. The frame stay has a cylindrical anti-vibration rubber 14 facing upward at each tip of the front and rear stays 11 and 12.
In addition, rectangular anti-vibration rubber 15 is attached near the bent portions of the frame stays 13, respectively. The fender step 7 includes a vibration isolating rubber 14,
Front and rear stays 11, 12 with 15 interposed between them
By integrally fixing bolts to each tip of the rear stay 11 on the fender portion 7b side,
It is assembled in a state where it is elastically supported at four locations: two locations by the front stay 12 on the step portion 7a side, and two locations by the front stay 12 on the step portion 7a side. The receiving and supporting action of the anti-vibration rubber 15 prevents the step portion 7a from wobbling when a worker gets on and off the platform.

Reference numeral 16 denotes a transmission cover for the rear transmission case 6 that protrudes from the opening 6a, and the transmission cover 16 is made of a rubber elastic body, and its lower edge In the front edge and the side edge, a flange 16a is provided.
When the fender step 7 is assembled, the flange 16a on the front edge side touches the upper surface of the transmission cases 5, 6 and the step portion of the fender step 7. 7a.

Furthermore, in this embodiment, 19 is an oil filter provided in an oil passage 18 connecting the rear transmission case 6, which also serves as an oil tank, and the oil pump 17 on the engine 3 side. The frame stay 12 and the frame stay 13 are arranged in a space surrounded by the frame stay 13 .

In the embodiment of the present invention constructed as described above, when assembling the traveling body 1, the transmission cover 16 is placed over the rear transmission case 6, and the fender step 7 is assembled so as to cover it from above. By fixing bolts to each stay 11, 12, the mission cover 16
will be firmly fixed together with the fender step 7.

That is, a flange 16a extends forward at the lower edge of the transmission cover 16 that covers the rear transmission case 6, and when the fender step 7 is assembled, the flange 16a is attached to the step 7a and the front part. It is supported while being sandwiched between it and the transmission case 5.

Therefore, even if the lower edge of the transmission cover 16 is simply placed over the transmission case 6 without being fixed with special metal fittings prepared separately as in the past, the operator's foot will not get caught. The workability of the assembling work is greatly improved since the workpiece will not be turned over or lifted up and come off inadvertently and become a hindrance to the work underfoot. Moreover, this mission cover 16
is made of rubbery elastic material, so
The flange 16a sandwiched between the fender step 7 and the front transmission case 5 acts as an elastic support for the fender step 7. Therefore, the fender step 7, which has a large area, can be moved forward and backward as in the embodiment. Even if it is assembled with only four fixed supports by stays 11 and 12,
Even if a worker steps on the step portion 7a of the fender step 7, the step portion 7a will not be bent, and vibration transmission to the engine 3 and the like will be reliably reduced.

Furthermore, as in this embodiment, the fender step 7
is an integrally molded product, but as mentioned above, the fender step 7 is elastically supported and fixed at four points with the vibration isolating rubber 17 interposed, so the assembly structure is greatly simplified. In addition to this, vibration and noise from engine 3 are drastically reduced. Furthermore, in this case, the step part 7a is provided with an auxiliary receiving and supporting function by the vibration isolating rubber 15 provided on the frame stay 13 at a position forward of the support position by the front part stay 12, so that the step part 7a can be easily used by the operator. There is no chance of the vehicle becoming unstable due to inadvertent wobbling when getting on or off the vehicle.

In addition, as in this embodiment, the fender step 7
Since the oil filter 19 is arranged in the space surrounded by the front stay 12 and the frame stay 13 which elastically support the step portion 7a,
The oil filter 19 makes effective use of the space below the step portion 7a, has all four circumferences protected, and has the advantage that it can be installed at an outside position where it does not interfere with work in the field and is easy to replace. It is very convenient.

It should be noted that the present invention is of course not limited to the above-mentioned embodiments, and the point is that the flange extending horizontally at the lower edge of the mission cover is connected to the upper step part. Any means may be used as long as it is supported by being sandwiched between the front half of the lower transmission case covered by the step section.

[Operation and Effect] In summary, since the present invention is constructed as described above, when the transmission cover is mounted to cover the rear half of the transmission case from above, the lower edge of the transmission cover The flange extending horizontally from the lower edge of the part is sandwiched between the step part and the front half of the transmission case covered by the step part, so that the part is securely supported and held. . As a result, even though the mission cover is located at the step part, the lower edge of the mission cover can be easily secured even if the lower edge is simply covered as described above, without having to use metal fittings to fasten the lower edge as in the conventional method. There is no problem of inadvertently lifting it up, turning it up, and making it easier to install.

Moreover, since the flange sandwiched between the step part and the front half of the transmission case is made of rubber elastic material, the step part is supported by the transmission case with the flange interposed as a vibration-proof rubber. As a result, the vibration of the step part can be prevented by effectively utilizing the flange sandwiched between the steps to prevent the lifting from becoming strained, and the number of parts can be reduced due to the dual use of parts, and the structure can be improved. The simplification of can be reliably measured.

[Brief explanation of the drawing]

The drawings show an embodiment of the transmission cover structure for a working vehicle according to the present invention, and FIG. 1 is a side view of the main parts of an agricultural tractor, and FIG.
3 is a longitudinal sectional view of the fender step portion, FIG. 4 is a perspective view of the mission cover portion, and FIG. 5 is a layout diagram of the hydraulic system. In the figure, 5 is the front transmission case, 6
7 is a rear transmission case, 7 is a fender step, 7a is a step portion, 16 is a transmission cover, and 16a is a flange portion.

Claims (1)

[Scope of utility model registration request] A work vehicle configured such that the front half of the transmission case is covered by a step section disposed on the upper surface, and the rear half of the transmission case is raised higher than the step section and exposed upward from the step section. A transmission cover that covers the rear half of the transmission case from above is formed of a rubber elastic material, and a flange extending in the horizontal direction is formed at the lower edge of the transmission case cover. A transmission cover structure for a work vehicle, characterized in that a flange part is sandwiched and supported between the front half part of the transmission case and the step part.