JPH0720573Y2 - Sensor mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a sensor mounting structure, and more particularly to a waterproof mounting structure for a mounted sensor.

<Prior art> In a sensor that detects the operating position of an operating system such as an operating lever, in order to prevent water from entering the sensor due to work equipment cleaning or work during rain, etc. It has a waterproof structure.

On the other hand, the sensor is fastened to the mounting member on the main body side with a bolt or the like through the cover member, but the mounting structure has not been conventionally provided with a special waterproof structure.

<Problems to be solved by the invention> In the sensor mounting structure as described above, water that has entered through the hole through which the shaft is inserted or water that has permeated between the cover member and the mounting member is attached to the base end portion of the protruding shaft. It may accumulate. At this time, when the atmospheric pressure inside the sensor decreases due to the temperature difference between the temperature inside the sensor and the outside air due to steam cleaning of the work equipment, etc., the accumulated water is sucked into the sensor,
There was a problem such as water getting inside the sensor.

The above-mentioned trouble is that water is forcibly sucked in due to the temperature change, and even if the performance of the waterproof packing of the sensor itself is improved, it cannot be easily prevented.

The present invention is intended to prevent water from entering the sensor by preventing a water pool from being generated at the proximal end of the shaft.

<Means for Solving the Problems> The present invention for solving the above problems includes a sensor 24 having a shaft 39 protruding from a main body 23, a cover member 25 combined with a shaft protruding side of the sensor, and a cover. Element
In the configuration including a mounting member 41 that is overlapped and combined with the shaft protruding side of 25, a plate-like shape that covers the base end by forming a space 33 on the base end side of the shaft protruding portion of the sensor 24 in the cover member 25. The protrusion 31 is provided, and the dish-shaped protrusion 31 is provided.
A discharge hole 35 for discharging water that has entered the space 33 is formed in the lower peripheral wall of the, and the fitting member 41 is provided with a fitting portion 41a for fitting with the dish-shaped protruding portion 31.

<Operation> The water that has permeated between the cover member 25 and the mounting member 41 travels along the peripheral wall of the dish-shaped protruding portion 31 and is discharged to the lower portion that travels outside the shaft 39. Further, the water that has entered the space 33 is discharged downward by the discharge hole 35 at any time. Further, since the drainage hole 35 is covered by the mounting member 41, intrusion of water from the drainage hole 35 is prevented. This prevents water from accumulating at the base end of the shaft 39 protruding, and prevents water from being sucked into the sensor 24 from the base end of the shaft 39 protruding.

<Embodiment> A sensor mounting structure according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a perspective view showing the front driver's seat 3 of the combine 1. On the left side of the driver's seat 3, there is provided a panel board 5 on which operation members for operating each work machine are arranged.
An operating lever 9 for operating the forward and backward movement of the vehicle is projected from a guide hole 7 provided in the panel plate 5 so as to be swingable back and forth.

FIG. 3 shows a mounting state of the operation lever 9, and is a rear sectional view of the mounting portion of the operation lever 9. Operating lever 9
Is supported by a lower front-rear fulcrum 11 so as to be swingable back and forth, and friction plates 13, 13 are inserted on the left and right sides of the fulcrum 11,
The disc spring 15 causes a swing resistance of the operating lever 9. Reference numeral 17 is an adjusting nut for adjusting the biasing force of the disc spring 15.

Further below the operating lever 9, a connecting pin 19 is provided so as to project the amount of movement of the operating lever 9 to a sensor 24 described later.

A sensor mounting portion 21 is provided on the uncut area side of the operation lever 9. The sensor mounting portion 21 will be described below. FIG. 1 is a side sectional view showing the sensor mounting portion 21. The sensor 24 having an electric mechanism inside has, for example, a protruding shaft.
This is a potentiometer that converts the amount of rotation of 39 into an amount of electricity and transmits the operating position of the operating lever 9.

The sensor 24 is composed of a shaft 39 with a main body 23 having a built-in electric mechanism, and a cylindrical sensor convex portion 27 at the shaft 39 projecting base end portion. It is fitted into the fitting recess 29 of the cover member 25. A dish-shaped projecting portion 31 is formed on the shaft projecting base end portion of the sensor 24 in the cover member 25, and a space 33 is formed inside the dish-shaped projecting portion 31. Further, an insertion hole 37 through which the shaft 39 of the sensor 24 projects is formed in the center of the dish-shaped projecting portion 31. Further, on the lower side of the dish-shaped protruding portion 31, there is formed a discharge hole 35 for discharging the water that has entered the space 33 downward.
The discharge hole 35, as shown in FIGS. 1, 4 and 5,
It is provided in a fan shape around the peripheral surface of the dish-shaped protruding portion 31 and around the base end portion. A mounting member 41 mounted on the working machine side is overlapped and mounted on the shaft protruding side of the cover member 25, and is fastened with a bolt or the like. The cover member 25 so that there is a gap between it and the cover member 25.
A concave surface 25a is formed on the protruding side of the shaft 39 of 25.
Further, arcuate mounting holes 25b centering on the shaft 39 of the sensor 24 are provided on the left and right sides of the cover member 25. The mounting hole 25b allows the mounting angle of the sensor 24 to be arbitrarily changed depending on the type of the operating lever.

On the other hand, as shown in FIG.
A circular fitting portion 41a for fitting with 31 is bored, and bolt holes 41 for attaching the cover member 25 are provided on the left and right sides thereof.
b is drilled. Further, near the end of the mounting member 41, a bolt insertion hole 41 for mounting the mounting member 41 on the working machine side is provided.
c is provided. Here, when the fitting portion 41a and the dish-shaped protruding portion 31 of the cover member 25 are fitted, the discharge hole of the dish-shaped protruding portion 31 is formed.
35 is completely covered and water is prevented from entering through the discharge hole 35. Shaft 39 of sensor 24 mounted as above
A sensor arm 43 is attached to the tip of the, and the connecting pin 19 is inserted into an engaging portion 43a vertically provided at the lower end of the sensor arm 43. As shown in FIG. 6, the sensor arm 43
Thus, the swing amount of the operating lever 9 is transmitted as the rotation amount of the shaft 39.

The operation of the sensor mounting structure will be described below with reference to FIG. Considering the case where water is splashed on the sensor 24 attached as described above due to cleaning or the like, the water that has entered the gap between the cover member 25 and the attachment member 41 intrudes downward, but the peripheral wall of the dish-shaped protruding portion 31. Since it is blocked by the water, the water flows out downward without touching the protruding base end portion of the shaft 39. Further, the water that has entered through the insertion hole 37 through which the shaft 39 is inserted moves to the lower side of the space 33, and the lower end b of the discharge hole 35.
Is moved downward from the gap between the cover member 25 and the mounting member 41 and discharged from the lower end c of the gap. Therefore, no water pool is formed at the proximal end portion of the shaft 39 of the sensor 24, and water is not sucked into the sensor 24.

Here, since the shape of the discharge hole 35 is an arc, the sensor 24 may be different depending on the mounting position of the sensor 24 and the type of the operation lever.
Even if the mounting angle is changed, the discharge hole 35 is always located on the lower side, and the versatility of the sensor 24 arises.

Next, the lateral movement mechanism of the operating lever 9 will be described. The front-back movement fulcrum 11 of the operation lever 9 which has already been described projects to the holding member 45, and the holding member 45 is swingably supported by the left-right movement fulcrum 47 on the working machine side. The operating lever 9 moves to the left and right to link 49 connected to the holding member 45.
The forward / backward clutch is turned on and off via. Here, a biasing spring 51 is provided between the upper end of the holding member 45 and the inside of the operation panel of the work machine 1, and always biases the operation lever 9 toward the cut land. That is, as shown in FIG. 8, even in the neutral position, the operating lever 9 is always positioned on the forward direction side.

This prevents the operation lever 9 from wobbling in the neutral position, facilitates frequently used forward operation, and prevents backward start due to an erroneous operation.

<Effects of the Invention> According to the structure of the present invention configured as described above, the cover member and the mounting member stacked on the outside thereof prevent the water from being directly applied to the sensor, and the invading water is sequentially discharged. Water does not collect in the space at the base end of the rotation shaft of the sensor. Therefore, due to the temperature change in the sensor,
It is possible to prevent water from being sucked in from the base end portion of the shaft, which has the effect of dramatically extending the life of the sensor.

[Brief description of drawings]

1 is a side sectional view of a sensor mounting portion, FIG. 2 is a front perspective view of a combine, FIG. 3 is a partially enlarged view showing a mounting structure of an operating lever, FIG. 4 is a bottom view of a cover member, and FIG. FIG. 6 is a front view of the cover member, FIG. 6 is a rear view of the sensor mounting portion showing a mounting state of the sensor, and FIG. 7 is a front view of the mounting member.
FIG. 8 is a plan view of the panel plate showing the positional relationship between the guide hole of the panel plate and the operation lever. 23: body, 24: sensor 25: cover member, 31: dish-shaped protrusion 33: space, 35: discharge hole 39: shaft, 41: mounting member 41a: fitting portion.

Claims (1)

[Scope of utility model registration request] 1. A sensor (24) having a shaft (39) protruding from a main body (23), a cover member (25) combined with the shaft protruding side of the sensor, and a shaft protruding side of the cover member (25). In a configuration including a mounting member (41) that is combined in an overlapping manner, a plate that forms a space (33) on the base end side of the shaft protrusion of the sensor (24) in the cover member (25) and covers the base end. -Shaped protrusion (31) is provided, and a drain hole (35) for discharging water that has entered the space (33) is formed in the lower peripheral wall of the dish-shaped protrusion (31), and the attachment member (41) is formed.
The fitting part (41) for fitting with the dish-shaped projection (31)
Sensor mounting structure with a).