JP3625226B2 - Snow blade of snow plow - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a snow blade of a snow removal plow used as a snow removal attachment for a wheel loader or a truck.
[0002]
[Prior art]
A snow blade of a snow removal plow includes a blade body and an edge device that is reversibly attached to the lower end of the blade body. When the edge device hits an obstacle, the edge device is reversed to absorb the shock. It has become. Further, it is necessary to hold the edge device so as not to be reversed until a predetermined shock occurs. For this reason, a reverse lock device is provided.
[0003]
A conventional snow blade reversal lock device includes a notch (movable body) that slides in a cylindrical case (support body), as described in Japanese Utility Model Publication Nos. 2-33785 and 4-99713. It is composed of a combination of springs, and when a force exceeding a specified level is applied to the edge device, the notch is pushed into the case against the spring and the lock is released.
[0004]
[Problems to be solved by the invention]
However, in the configuration of the above conventional reversal lock device, in order to smoothly move a movable body such as a notch in the case, it is necessary to precisely process the sliding surface such as the case and the notch.
[0005]
In addition, since the device is exposed to snow, snow melting agent, etc., rust and the like are likely to occur in precision processed parts, and countermeasures must be considered.
[0006]
Assembling is also difficult because it requires a great amount of force such as pushing the spring.
[0007]
Therefore, there is a problem that the above-described prior art is precise and requires trouble and cost.
[0008]
An object of the present invention is to provide a snow blade of a snow plow having a reversing lock device that operates reliably even under severe natural conditions such as snow, earth and sand, and has a structure that is inexpensive and does not easily cause a failure. .
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention adopts the following configuration. That is, a snow plow having a blade body, an edge device that is reversibly attached to the lower end of the blade body, and a reversing lock device that prevents the edge device from reversing until a predetermined force is applied to the edge device. In the snow blade, the reverse lock device is fixed to the edge device, and is attached to the blade body so as to stop the movement of the lock in the reverse direction. , locking tool is disengaged by elastic deformation when a force of defined edge device is applied, it possesses a lock shaft edge device makes it possible to reverse the locking shaft a bracket secured to the blade body Both ends are supported, and the locking tool contacts the vicinity of the center of the lock shaft and bends the vicinity of the center of the lock shaft. And out of the configuration.
[0011]
Preferably, the lock shaft is supported by the bracket so as to be slidable in the axial direction. The lock shaft may be rotatably supported by the bracket.
[0012]
Moreover, in order to achieve the said objective, this invention employ | adopts the following structure. That is, a snow plow having a blade body, an edge device that is reversibly attached to the lower end of the blade body, and a reversing lock device that prevents the edge device from reversing until a predetermined force is applied to the edge device. In the snow blade, the reverse lock device is fixed to the edge device, and is attached to the blade body so as to stop the movement of the lock in the reverse direction. A locking shaft that allows the edge device to be reversed by elastically deforming when the specified force is applied to the edge device, and the edge device can be reversed.The lock shaft is attached to a bracket fixed to the blade body. The lock is in contact with the free end of the lock shaft and bent near the free end of the lock shaft. A configuration that deviates in Rukoto.
[0013]
Moreover, in order to achieve the said objective, this invention employ | adopts the following structure. That is, a snow plow having a blade body, an edge device that is reversibly attached to the lower end of the blade body, and a reversing lock device that prevents the edge device from reversing until a predetermined force is applied to the edge device. In the snow blade, the reverse lock device is fixed to the edge device, and is attached to the blade body so as to stop the movement of the lock in the reverse direction. And a lock shaft that allows the edge device to be reversed by elastically deforming when the prescribed force is applied to the edge device, and the reverse lock device is fixed to the blade body. A link that is rotatably supported by a bracket and supports the lock shaft, and the lock shaft when the locking tool rotates in the reverse direction. The direction of the force applied without rotating the link, the locking member is in the direction of the force applied to said locking shaft when returning from the inversion position a structure further having a stopper to rotate the link.
[0014]
Moreover, in order to achieve the said objective, this invention employ | adopts the following structure. That is, a snow plow having a blade body, an edge device that is reversibly attached to the lower end of the blade body, and a reversing lock device that prevents the edge device from reversing until a predetermined force is applied to the edge device. In the snow blade, the reverse lock device is fixed to the edge device, and is attached to the blade body so as to stop the movement of the lock in the reverse direction. And a locking shaft that allows the edge device to be reversed by elastically deforming when the prescribed force is applied to the edge device, the bracket being fixed to the edge device. The position of the locking tool is adjusted so that the deflection when the locking tool is detached from the lock shaft is adjusted by adjusting the position of the locking tool. Configuration to be.
[0015]
[Action]
The reversing lock device is fixed to the edge device, and is attached to the blade body so as to stop the reversing direction of the reversing direction. When a shock is applied to the tip of the edge device due to an obstacle, the edge device is applied to the edge device by being elastically deformed to release the locking tool and allowing the edge device to be reversed. When the force exceeds a specified value, the locking device elastically deforms the lock shaft and comes off, and the edge device is reversed to absorb the shock. When returning the edge device, bend the lock shaft from behind. At this time, by loosening the inclination of the cam surface of the locking tool at the contact portion with the lock shaft, it can be returned with a smaller force than when the locking tool is released.
[0016]
In contrast to the conventional one, the reversing lock device part composed of the locking tool and the lock shaft does not have a precise processing part and a precise sliding part, so it is always normal even in severe natural conditions such as earth and sand, ice and snow. Function can be demonstrated. In addition, since there is no precision processing, the manufacturing cost is reduced. Furthermore, since the force can be adjusted depending on the position of the locking tool, the adjustment is easy and the assembly is easy.
[0017]
By supporting the lock shaft in an axially slidable and / or rotatable manner on the bracket, when the edge device is reversed, when the lock shaft is bent by being pushed by the lock device, the lock device is held until it is released. The force can be easily and accurately set by the deflection allowance δ of the lock shaft.
[0018]
The link that is rotatably held by the bracket fixed to the blade body and supports the lock shaft is not rotated by the force in the direction applied to the lock shaft when the lock is rotated in the reverse direction, and the lock is reversed. When the edge device is returned from the reverse position by rotating the force in the direction applied to the lock shaft when returning from the position, the locking device rotates the link to return the edge device to the original position. It is not necessary to bend the lock shaft, and the edge device can be returned with a very small force.
[0019]
【Example】
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
[0020]
First, a first embodiment of the present invention will be described with reference to FIGS.
[0021]
FIG. 1 is a perspective view of a snow plow having a snow blade 50 according to the present embodiment. The snow blade 50 includes a blade body 1 and three edge devices 2 attached to the lower end of the blade body 1 in a reversible manner. It is configured.
[0022]
The edge device 2 of the snow blade 50 is viewed from the bottom as shown in FIG. 2, and the blade body 1 and the edge device 2 are attached to two pairs of brackets 3, 3; 4, 4 fixed to the blade body 1. Two pairs connecting the supported pins 7, 7; 8, 8 and the two pairs of brackets 5, 5; 6, 6 fixed to the edge device 2. Link 11, 11; 12, 12. Here, the brackets 3, 4, 5, 6 and the links 11, 12 constitute a trapezoidal link mechanism as shown in FIG. 3, and the edge device 2 has a predetermined path to the blade body 1 by this trapezoidal link mechanism. Can be reversed.
[0023]
Further, as shown in FIG. 4, a stopper 13 is fixed to the blade body 1, and the upper end portion of the edge device 2 is applied to the stopper 13 to prevent the blade body 1 and the link 11 and 12 from being lowered downward.
[0024]
In the edge device 2, a bracket 14 is fixed at the center in the longitudinal direction, and a locking fitting 16 is fixed to the bracket 14 with a bolt 15. Further, as shown in FIG. 5, a relatively large hole 15 a is formed in the locking metal 16, and the locking metal 16 is positioned with respect to the bracket 14 due to a gap between the hole 15 a and the bolt 15. It is mounted adjustable. The edge device 2 is also provided with a leading edge 2a.
[0025]
On the other hand, a pair of brackets 17, 17 different from the brackets of the trapezoidal link mechanism are fixed to the blade body 1 by bolts 18, 18, and lock shafts 19 are supported at both ends by the brackets 17, 17. Is held by the washers 20 and 20 and the snap rings 21 and 21 so as not to come off in the axial direction. The locking bracket 16 and the lock shaft 19 constitute a reverse lock device.
[0026]
The positional relationship between the brackets 17 and 17 and the lock shaft 19, the tip shape of the locking bracket 16, and the positional relationship between the brackets 17 and 17 and the locking bracket 16 and the lock shaft 19 are as shown in FIGS. 6 and 7. .
[0027]
That is, the locking metal fitting 16 is brought into contact with the lock shaft 19 so as to leave a deflection allowance δ at about 1/2 L in the center of the brackets 17 and 17 in the axial direction of the lock shaft 19. Here, L is the distance between the brackets 17 and 17, and this distance L and the deflection allowance δ are set so that the lock shaft 19 does not cause permanent deformation due to bending stress. The holding force until it is released is determined by adjusting the set deflection δ or by the thickness of the lock shaft 19. Further, in the moving direction of the locking bracket 16 when the edge device 2 is reversed, the tip R of the locking bracket 16 is brought into contact with the outer diameter of the lock shaft 19 so that it can pass while causing the deflection δ. The locking metal fitting 16 is attached to the bracket 14 by adjusting with the bolt 15.
[0028]
The locking metal fitting 16 has a cam surface 16a that contacts the lock shaft 19 in the moving direction when the edge device 2 is reversed, and a lock shaft 19 that contacts the locking shaft 19 in the moving direction when the edge device 2 returns from the reversed position. The cam surface 16b has a lower slope at the contact portion with the lock shaft 19 than the cam surface 16a so that the locking member 16 can be returned with a smaller force when it is detached from the lock shaft 19. .
[0029]
Further, there is a clearance between the outer surfaces of the brackets 17 and 17 and the washers 20 and 20, and the lock shaft 19 is supported by the brackets 17 and 17 so as to be rotatable and slidable in the axial direction. By supporting the lock shaft 19 in this way, when the lock shaft 19 bends by the locking metal fitting 16 when the edge device 2 tries to reverse, it is prevented from bending to the brackets 17 and 17 until the locking metal fitting 16 is released. The holding force can be easily and accurately set by the deflection allowance δ of the lock shaft 19.
[0030]
Figure 8 shows a locus when the edge device 2 per obstructions leading edge 2a of the edge device 2 is inverted, the edge tip as C ₁ -C _2, also the tip of the locking member 16 is A locus such as D ₁ -D ₂ is taken. When the end of the engagement member 16 came to _two points D, the link 12 strikes the underside of the stopper 13, more is not inverted.
[0031]
In the present embodiment configured as described above, the lock shaft 19 is bent by the force applied to the locking metal fitting 16 until the cam surface 16a of the locking metal fitting 16 passes through the lock shaft 19. Since the stopper 19 does not come off, the edge device 2 is not reversed, and snow removal work can be performed integrally with the blade body 1.
[0032]
When the vehicle is removing snow from the road surface, if the tip edge 2a collides with a protrusion on the road surface, such as a manhole cover, the force is transmitted to the locking bracket 16 and exceeds the set holding force. Then, the cam surface 16a of the locking fitting 16 is detached by bending the lock shaft 19, and the edge device 2 is inverted to absorb the shock. When returning the edge device 2 from the reverse position, the lock shaft 19 is bent from the back of the edge device 2 and returned. However, the cam surface 16b of the locking bracket 16 is loosened at the contact portion with the lock shaft 19. Therefore, it can be returned with a smaller force than when the locking fitting 16 is released.
[0033]
According to the present embodiment, since the reversing lock device portion composed of the locking metal fitting 16 and the lock shaft 19 does not have a precise processing portion and a precise slip portion, the natural nature such as earth and sand, ice and snow, etc. is not provided. Even in the state, normal function can always be demonstrated.
[0034]
In addition, since there is no precision processing, the manufacturing cost is reduced.
[0035]
Further, since the force can be adjusted depending on the positional relationship of the locking metal fitting 16, the adjustment is easy and the assembly is easy.
[0036]
A second embodiment of the present invention will be described with reference to FIGS. In the figure, members equivalent to those shown in FIG.
[0037]
In FIG. 9, a pair of brackets 30, 30 different from the bracket of the trapezoidal link mechanism are fixed to the blade body 1, and the pair of links 31, 31 are further rotated by pins 33, 33 to the brackets 30, 30. It is held freely. In this embodiment, the lock shaft 19 is slidably and rotatably attached to the links 31 and 31 so that the lock shaft 19 does not come off in the axial direction by the washers 20 and 20 and the snap rings 21 and 21. Is retained.
[0038]
As shown in FIG. 10, the end E of the link 31 opposite to the lock shaft 19 abuts against a stopper 34 fixed to the blade body 1 and restricts the clockwise rotation around the pin 33 from that position. Direction rotation is possible.
[0039]
Further, as shown in FIG. 11, which is a view taken along the line XI-XI in FIG. 9, a spring 32 having a weak tensile force is provided between the end portion of the lock shaft 19 and the blade body 1 to lock the link 31. The end portion on the shaft 19 side is pulled toward the blade body 1 by the spring 32, and the link 31 always hits the stopper 34 at the point E and urges the link 31 clockwise so as to be held at this position. .
[0040]
In the present embodiment configured as described above, the action when the force in the reverse direction is applied to the edge device 2 is the same as the previous embodiment, and the force applied to the locking metal fitting 16 is set to the lock shaft 19. Since the locking tool 19 does not come off until the force is exceeded, normal snow removal work is possible. When the force applied to the locking metal fitting 16 exceeds the set holding force, the locking metal fitting 16 is released and the edge device 2 is inverted. To absorb shock.
[0041]
When the edge device 2 is returned from the reverse position, the cam surface 16b of the locking bracket 16 opposes the spring 32 pulled by a weak force, and the link 31 is rotated counterclockwise as viewed in FIG. Therefore, it is not necessary to bend the lock shaft 19, and it can be returned with a smaller force than when it comes off.
[0042]
A third embodiment of the present invention will be described with reference to FIGS. In the figure, members equivalent to those shown in FIG.
[0043]
In FIG. 12, the blade body 1 is fixed to the blade body 1 by a pair of brackets 37a, 37b bolts 38, 38 different from the bracket of the trapezoidal link mechanism, and the lock shaft 19A is cantilevered on the brackets 37a, 37b. The fastener 16 and the lock shaft 19A constitute a reverse lock device.
[0044]
The attachment relationship between the brackets 37a and 37b and the lock shaft 19A is shown in FIG. One end of the lock shaft 19A is inserted into the brackets 37a and 37b, and is held by the bracket 37a by the washer 20 and the snap ring 21 so as not to come off in the axial direction. The locking metal fitting 16 is brought into contact with the lock shaft 19A so as to leave a deflection allowance δ at a distance LA from the bracket 37b on the free end side of the lock shaft 19A. Here, the distance LA and the deflection allowance δ are set to such an extent that the lock shaft 19A does not cause permanent deformation due to bending stress, as in the first embodiment, and the holding force until the locking bracket 16 is released when the edge device 2 is reversed. Is determined by adjusting the set deflection δ or the thickness of the lock shaft 19.
[0045]
In the present embodiment configured as described above, the same effects as those of the first embodiment can be obtained.
[0046]
In the above-described embodiment, the lock function is obtained by utilizing the flexural deformation of the lock shaft. However, a configuration utilizing the torsional deformation of the lock shaft may be used, and in this case, the same effect can be obtained.
[0047]
【The invention's effect】
According to the present invention, since the reversing lock device part constituted by the locking tool and the lock shaft does not have a precise processing part and a precise sliding part, it always functions normally even in severe natural conditions such as earth and sand, ice and snow. Can demonstrate.
[0048]
In addition, since there is no precision processing, the manufacturing cost is reduced.
[0049]
Furthermore, since the force can be adjusted depending on the position of the locking tool, the adjustment is easy and the assembly is easy.
[Brief description of the drawings]
FIG. 1 is a perspective view of a snow blade of a snow removal plow according to a first embodiment of the present invention.
FIG. 2 is a view from the bottom of the snow blade shown in FIG. 1;
3 is a cross-sectional view taken along line III-III in FIG.
4 is a cross-sectional view taken along line IV-IV in FIG.
FIG. 5 is a cross-sectional view of an attaching portion of a locking tool.
FIG. 6 is an enlarged view of a contact portion between a locking tool and a lock shaft.
FIG. 7 is a diagram showing an axial positional relationship between a lock shaft and a locking tool.
FIG. 8 is a diagram illustrating a locus of an edge tip and a locking tool tip when the edge device is reversed.
FIG. 9 is a view from the bottom of a snow blade of a snow removal plow according to a second embodiment of the present invention.
10 is a cross-sectional view taken along the line XX of FIG.
11 is a cross-sectional view taken along line XI-XI in FIG.
FIG. 12 is a view of a snow blade of a snow removal plow according to a third embodiment of the present invention as seen from the lower surface.
FIG. 13 is a diagram showing an axial positional relationship between a lock shaft and a locking tool.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Blade body 2 Edge device 11, 12 Link 13 Stopper 15 Bolt 16 Locking tool 17 Bracket 19; 19A Lock shaft 30 Bracket 31 Link 34 Stopper 50 Snow blade

Claims (6)

A snow blade of a snowplow plow comprising a blade body, an edge device reversibly attached to the lower end of the blade body, and a reversing lock device that prevents the edge device from reversing until a predetermined force is applied to the edge device. In
The reversing lock device is fixed to the edge device, and is attached to the blade body so as to stop the reversing direction of the revolving direction of the locking device, and is attached to the blade device. Having a lock shaft that elastically deforms when the prescribed force is applied and the locking device comes off, allowing the edge device to reverse;
The lock shaft is supported at both ends by a bracket fixed to the blade body, and the locking tool comes in contact with the vicinity of the center of the lock shaft and is detached by bending the vicinity of the center of the lock shaft. And a snow blade. The snow blade of the snow plow according to claim 1 , wherein the lock shaft is supported by the bracket so as to be slidable in the axial direction. The snow blade of the snow removal plow according to claim 1 or 2 , wherein the lock shaft is rotatably supported by the bracket. A snow blade of a snowplow plow comprising a blade body, an edge device reversibly attached to the lower end of the blade body, and a reversing lock device that prevents the edge device from reversing until a predetermined force is applied to the edge device. In
The reversing lock device is fixed to the edge device, and is attached to the blade body so as to stop the reversing direction of the revolving direction of the locking device, and is attached to the blade device. Having a lock shaft that elastically deforms when the prescribed force is applied and the locking device comes off, allowing the edge device to reverse;
The lock shaft is cantilevered by a bracket fixed to the blade body, and the locking tool comes into contact with the vicinity of the free end of the lock shaft and is released by bending the vicinity of the free end of the lock shaft. A snow blade characterized by that. A snow blade of a snowplow plow comprising a blade body, an edge device reversibly attached to the lower end of the blade body, and a reversing lock device that prevents the edge device from reversing until a predetermined force is applied to the edge device. In
The reversing lock device is fixed to the edge device, and is attached to the blade body so as to stop the reversing direction of the revolving direction of the locking device, and is attached to the blade device. Having a lock shaft that elastically deforms when the prescribed force is applied and the locking device comes off, allowing the edge device to reverse;
The reversal lock device is rotatably held by a bracket fixed to the blade body, a link that supports the lock shaft, and a force applied to the lock shaft when the locking tool rotates in the reverse direction. Then, the snow blade further comprises a stopper that does not rotate the link and rotates the link with a force in a direction applied to the lock shaft when the locking tool returns from the reverse position. A snow blade of a snowplow plow comprising a blade body, an edge device reversibly attached to the lower end of the blade body, and a reversing lock device that prevents the edge device from reversing until a predetermined force is applied to the edge device. In
The reversing lock device is fixed to the edge device, and is attached to the blade body so as to stop the reversing direction of the revolving direction of the locking device, and is attached to the blade device. Having a lock shaft that elastically deforms when the prescribed force is applied and the locking device comes off, allowing the edge device to reverse;
The locking device is attached to a bracket fixed to the edge device so that the position of the locking device can be adjusted, and the deflection of the locking device when the locking device is detached from the lock shaft is adjusted by adjusting the position of the locking device. Snow blade characterized by.

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