JPS6115096Y2 - - Google Patents

Description

[Detailed explanation of the invention] Blades generally used for earthworks, snow removal, etc.
Equipped with an impact damage prevention device to prevent impact damage to the blade, vehicle body, etc. due to obstacles during work.

As shown in Fig. 1, the conventionally used device is such that a blade b is rotatably connected to the front part of a car body a with a pin e and fixed with a shear pin d, and an impact is applied to the tip of the cutting edge c. When the shear pin d is applied, the shear pin d is cut, and the blade b rotates around the pin e to the position shown by the dotted line in Figure 1 to prevent impact, but in this structure, after the shear pin is cut, the tip of the cutting edge The car body may sink into the ground or lift up, resulting in secondary damage to cutting edges and blades, digging deep into the ground, damaging obstacles (manholes, paving stones), etc., or lifting the car body. This can lead to secondary injuries such as the risk of slips and falls.

This invention relates to the invention of an impact destruction prevention device that eliminates the above-mentioned drawbacks, and includes a structure in which the upper bracket of the vehicle body and the arm above the blade are slidably connected by a pin loosely fitted into an elongated hole, and the lower bracket of the vehicle body and the arm of the upper part of the blade are slidably connected. The lower bracket of the blade is rotatably connected by a pin with a link interposed therebetween, and the link and the lower bracket of the vehicle body are fixed by a shear pin in the vicinity of the pin, so that the blade side of the link is placed higher. The purpose of this invention is to provide an impact destruction prevention device that eliminates the drawbacks of the prior art and improves efficiency and safety.

Since the present invention is as described above, the cutting edge, blade,
This prevents damage caused by impact to the vehicle body, etc., and after the shear pin is cut, the blade moves upward and the tip of the cutting edge is rotated upward and rearward, lifting it off the ground, due to the structure in which the front part of the link rotates clockwise around the pin on the vehicle body and the slidable connection by the pin loosely fitted into the long hole, eliminating the secondary damage described above in the conventional device. Furthermore, even if the shear pin is cut, the blade will not tilt because it is connected to the vehicle body at the top and bottom, so the shear pin can be easily replaced and repaired by simply adjusting the blade up and down, allowing for efficient and safe work.

The embodiment will be described below with reference to FIGS. 2, 3, 4, and 5. An upper bracket 1a and a lower bracket 1b are fixed to the upper and lower front parts of the vehicle body 1, and a cutting edge 3 is provided along the lower edge. An arm 4 and a bracket 2a are fixed to the upper and lower parts of the blade 2, and one bracket 1a of the vehicle body 1 and the arm 4 of the blade 2 are slidably connected by a pin 7c loosely fitted in an elongated hole 8. (In the illustrated example, the bracket has an elongated hole and the arm has a pin.) The other bracket 1b of the vehicle body 1 and the bracket 2a of the blade 2 are rotatably connected by pins 7a and 7b via a link 5. and connect the link 5 and the other bracket 1b of the vehicle body 1 with the pin 7a.
The link 5 is fixed by the shear pin 6 near the link 5.
The blade 2 side (pin 7b side) is placed high, so that if the shear pin 6 is cut due to impact, the blade 2
The tip of the holder is designed to lift upward toward the rear.

With the above-mentioned embodiment, if an impact is applied to the tip of the cutting edge 3 due to an obstacle while moving forward, the shear pin 6 will be cut off, thereby avoiding impact damage to the cutting edge, blade, vehicle body, etc. , the upper part is connected by a pin 7c that can slide upward in the elongated hole 8, so that the blade 2 moves upward and the front part of the elevated link 5 rotates clockwise, so that the tip of the cutting edge 3 is rotated counterclockwise. It is easily moved in the upper rear direction and lifted from the ground to the state shown in Figure 4, and after cutting the shear pin, the cutting edge, the blade is not damaged secondarily, the blade is not gouged deeply into the ground, the manhole, paving stone etc. There are no secondary problems like conventional devices, such as not destroying the vehicle or not being able to lift the vehicle body.
Since the shear pins are connected at the top and bottom even after they are cut, the blades do not tilt significantly, and the shear pins can be refilled by simply adjusting the blades up and down, allowing for efficient and safe work.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an outline of a conventional impact destruction prevention device, Fig. 2 is a perspective view showing an outline of the present device,
3 and 4 are side views showing the operating state, and FIG. 5 is an enlarged view showing the shear pin mounting structure. 1: Vehicle body, 1a, 1b: Bracket, 2: Blade, 2a: Bracket, 3: Cutting edge, 4: Arm, 5: Link, 6: Shear pin,
7a, 7b, 7c: pin, 8: long hole.

Claims (1)

[Scope of utility model registration request] The upper bracket of the vehicle body and the upper arm of the blade are slidably connected by a pin loosely fitted into an elongated hole, and the lower bracket of the vehicle body and the lower bracket of the blade are rotatably connected by a pin via a link. A blade impact destruction prevention device characterized in that the link and the lower bracket of the vehicle body are fixed by a shear pin in the vicinity of the pin, and the blade side of the link is disposed higher.