BACK DRAG SYSTEM FOR PLOW TRIP BLADE

Abstract

Embodiments of the innovation relate to a plow comprising a plow and a trip blade mechanism coupled to a plow body, the trip blade mechanism comprising a trip blade hingedly coupled to a base of the plow body and a blade return device coupled between the plow body and the trip blade. The plow comprises a back drag system coupled to the trip blade mechanism and configured to dispose the trip blade between a first plowing position relative to the plow body and a second back drag position relative to the plow body.

Claims

1. A plow, comprising: a plow body; a trip blade mechanism coupled to the plow body, the trip blade mechanism comprising: a trip blade hingedly coupled to a base of the plow body, and a blade return device coupled between the plow body and the trip blade; and a back drag system coupled to the trip blade mechanism and configured to dispose the trip blade between a first plowing position relative to the plow body and a second back drag position relative to the plow body.

2. The plow of claim 1, wherein the blade return device comprises a set of compression springs disposed between the plow body and the trip blade.

3. The plow of claim 1, wherein the back drag system comprises: an actuation mechanism coupled to the plow body; and a back drag mechanism coupled between the actuation mechanism and the trip blade.

4. The plow of claim 3, wherein the actuation mechanism comprises: a winch coupled to the plow body; and a cable carried by the winch, the cable coupled to the back drag mechanism.

5. The plow of claim 3, wherein the back drag mechanism comprises: a base coupled to the trip blade, the blade return device disposed between the base and the plow body; and a coupling member extending from the base, the actuation mechanism coupled to the back drag mechanism by the coupling member.

6. The plow of claim 3, wherein the back drag mechanism comprises: a first plate coupled to the trip blade; a second plate coupled to the trip blade; and a connecting element coupled to the first plate and the second plate and disposing the first plate and the second plate at a distance from each other, the actuation mechanism coupled to the back drag mechanism by the connecting element.

7. The plow of claim 1, further comprising a trip blade position indicator coupled to the trip blade, the trip blade position indicator configured to identify a rotational position of the trip blade.

8. The plow of claim 7, wherein the trip blade position indicator comprises: a shaft having a first end coupled to the trip blade and a second end extending from the plow body and having a set markings which correspond to the a rotational position of the trip blade.

9. A back drag system, comprising: an actuation mechanism; and a back drag mechanism coupled to the actuation mechanism and configured to be coupled to a trip blade of a plow; the actuation mechanism and back drag mechanism configured to dispose the trip blade between a first plowing position relative to the plow and a second back drag position relative to the plow.

10. The back drag system of claim 9, wherein the actuation mechanism comprises: a winch coupled to the plow body; and a cable carried by the winch, the cable coupled to the back drag mechanism.

11. The plow of claim 9, wherein the back drag mechanism comprises: a base configured to be coupled to the trip blade; and a coupling member extending from the base, the actuation mechanism coupled to the back drag mechanism by the coupling member.

12. The back drag system of claim 9, wherein the back drag mechanism comprises: a first plate configured to be coupled to the trip blade; a second plate configured to be coupled to the trip blade; and a connecting element coupled to the first plate and the second plate and disposing the first plate and the second plate at a distance from each other, the actuation mechanism coupled to the back drag mechanism by the connecting element.

13. The back drag system of claim 9, further comprising a trip blade position indicator configured to be coupled to the trip blade, the trip blade position indicator configured to identify a rotational position of the trip blade.

14. The back drag system of claim 13, wherein the trip blade position indicator comprises: a shaft having a first end coupled to the trip blade and a second end extending from the plow body and having a set markings which correspond to the a rotational position of the trip blade.

15. A method for performing a back drag plowing operation, comprising: disposing a plow of a vehicle in a raised position relative to a plowing surface; activating an actuation mechanism of a back drag system to rotate a trip blade of the plow from a first plowing position relative to the plow body and a second back drag position relative to the plow body; lowering the plow relative to the plowing surface; and moving the vehicle in reverse to cause the trip blade to pull material from the plowing surface.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The foregoing and other objects, features and advantages will be apparent from the following description of particular embodiments of the innovation, as illustrated in the accompanying drawings in which like reference characters refer to the same parts throughout the different views. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of various embodiments of the innovation.

[0011] FIG. 1 illustrates a rear view of a plow having a back drag system disposed in a first, forward plowing position, according to one arrangement.

[0012] FIG. 2 illustrates a side view of the plow of FIG. 1, according to one arrangement.

[0013] FIG. 3 illustrates a rear view of the plow of FIG. 1 having the back drag system disposed in a second, back drag position, according to one arrangement

[0014] FIG. 4 illustrates a side view of the plow of FIG. 3, according to one arrangement.

[0015] FIG. 5 illustrates a trip blade position indicator, according to one arrangement.

[0016] FIG. 6 illustrates an embodiment of a portion of a back drag mechanism, according to one arrangement.

[0017] FIG. 7 illustrates a perspective view of the back drag mechanism of FIG. 6, according to one arrangement.

[0018] FIG. 8 illustrates a rear view of the back drag mechanism of FIG. 6, according to one arrangement.

DETAILED DESCRIPTION

[0019] Embodiments of the present innovation relate to a back drag system for a trip blade of a plow. The back drag system is configured to position a trip blade between a first, forward plowing position, and a second, back drag position. For example, the back drag system includes a back drag mechanism coupled to the trip blade of the plow and an actuation mechanism, such as a winch, coupled to the back drag mechanism. In one arrangement, the back drag mechanism is configured as a horizontally-oriented plate and is disposed between the trip blade and a base portion of a blade return device, such as a set of compression springs or a hydraulic piston, carried by the plow. In another arrangement, the back drag mechanism is configured as a vertically-oriented plate coupled to the trip blade and disposed in proximity to the blade return device carried by the plow.

[0020] In use, the operator can activate the actuation mechanism to cause the back drag mechanism to rotate the trip blade toward a rear portion of the plow. When the trip blade reaches an extended back drag position relative to the plow, the back drag system maintains the blade return device in a compressed state, which mitigates rotation of the trip blade toward a front portion of the plow during a back drag procedure. With such positioning, the back drag system orients the trip blade to define a back drag angle relative to the rear portion of the plow. As such, during a back drag procedure, as an operator drives the vehicle in a reverse direction, the back drag system positions the trip blade to capture and pull a volume of material from a given area in a relatively efficient manner. Following completion of the back drag procedure, the operator can activate the actuation mechanism to cause the back drag mechanism to rotate the trip blade toward a front portion of the plow to a plowing position. Accordingly, the back drag system can be utilized by conventional plows to provide efficient removal of material from a relatively tight area. Additionally, installation of the back drag mechanism does not substantially increase the weight of the plow.

[0021] FIGS. 1 and 2 illustrates a plow 10 which includes a plow body 11 having a front portion 12 configured to collect and/or displace snow or other materials and a rear portion 14 configured to be secured to the frame of a vehicle. The plow 10 also includes a trip blade mechanism 16 and a back drag system 18 coupled to the plow body 11, according to one arrangement.

[0022] In order to mitigate damage to the plow 10 or the associated vehicle, the trip blade mechanism 16 is configured to absorb impact loads experienced during operation. For example, when plowing a material such as snow, the plow 10 may strike a hidden object, such as rocks or other debris concealed beneath a layer of snow. As such, in one arrangement, the trip blade mechanism 16 includes a trip blade 20 hingedly coupled to a base of the plow 10 and to a blade return device 21. During operation, as the trip blade 20 strikes an object, the trip blade 16 rotates toward the rear portion 14 of the plow body 11 about the hinge joint and along direction 15. The blade return device 21 is configured to return the trip blade 20 from a rotated position to an operational or plowing position, as shown in FIG. 2. For example, the blade return device 21 can be configured as a set of compression springs 22 coupled to the rear portion 14 of the plow 10 between a plow frame element 23 and the trip blade 20. During operation, as the trip blade 20 strikes an object and rotates along direction 15, the trip blade 20 compresses the compression springs 22 which absorb the impact load. The springs 22 can return to an extended position following impact to dispose the trip blade 20 to its operational position, as shown in FIG. 2. In another example, the blade return device 21 can be configured as a set of hydraulic pistons (not shown) configured to absorb an impact load received by the trip blade 20 and to return the trip blade 20 to its operational, extended position following impact.

[0023] The back drag system 18 is configured to actuate the trip blade mechanism 16 to dispose the trip blade 20 in a back drag position, with additional reference to FIGS. 3 and 4. In one arrangement, the back drag system 18 includes a back drag mechanism 25 coupled to the trip blade 20 of the plow 10 and an actuation mechanism 30 coupled to the back drag mechanism 25.

[0024] The back drag mechanism 25 can be configured in a variety of ways. In one arrangement, the back drag mechanism 25 can be configured as a base 24, such as a plate, coupled to the trip blade 20 via pins 26, 28 in a substantially horizontal orientation relative to the trip plate 20. With such orientation, as shown in FIG. 1, the back drag mechanism 25 can be placed in physical communication with the compression springs 22. For example, the base 24 is disposed between the trip blade 20 and a base portion of each of the compression springs 22.

[0025] The actuation mechanism 30 can be configured in a variety of ways. For example, actuation mechanism 30 can be configured as a winch 32 and a cable 34. The actuation mechanism 30 is configured to apply or release a load on the back drag mechanism 25 to cause the trip blade 20 to rotate relative to the plow 10. For example, the cable 34 of the winch 32 can be coupled to the base 24 via a coupling member 36 which extends from the base 24. Activation of the actuation mechanism 30 causes the winch 32 to rotate either in a first direction to shorten the length of the cable 34 and to rotate the trip blade 20 toward the rear 14 of the plow 10 or in a second direction to extend the length of the cable 34 and to rotate the trip blade 20 toward the front 12 of the plow 10. The actuation mechanism 30 can also include a pulley 38 disposed between the cable 34 and the coupling member 36. The pulley 38 is configured to reduce the load generated by the winch 32 on the cable 34.

[0026] During a conventional plowing operation, as indicated in FIGS. 1 and 2, the back drag system 18 maintains the trip blade mechanism 16 in a first position relative to the plow 10. For example, in the first positon, the compression springs 22 are disposed in an uncompressed state and the trip blade 20 is disposed in a plowing position, as shown. As such, as the vehicle moves the plow 10 forward along direction 40, the plow 10 collects and pushes material, such as snow, from a given area.

[0027] During a back drag plowing operation, as indicated in FIGS. 3 and 4, the back drag system 18 can dispose the trip blade mechanism 16 in a second position relative to the plow 10. For example, the vehicle operator can raise the plow 10 relative to the road or plowing surface 47 and can activate the actuation mechanism 30. The actuation mechanism 30 generates a load on the back drag mechanism 25 along direction 42, which, in turn, causes the trip blade 20 to rotate along direction 15 towards a rear portion 14 of the plow 10. When the trip blade 20 reaches an extended back drag position relative to the plow 10, the back drag system 25 orients the trip blade 20 to define a back drag angle 46 relative to a horizontal (e.g., road or plowing) surface 47. For example, the back drag system 25 can dispose the trip blade 20 at an angle of between about 45° and 120° relative to the horizontal surface 47. Further, the load generated by the actuation mechanism 30 causes the back drag mechanism 25 to translate along direction 42 which causes the base 24 to compress the compression springs 22. When the trip blade 20 reaches the extended back drag position relative to the plow 10, the back drag system 18 maintains the compression springs 22 in a compressed state, which mitigates rotation of the trip blade 20 toward the front portion 12 of the plow 10 during a back drag procedure.

[0028] Following positioning of the trip blade 20 in the second, extended position, during operation, the vehicle operator can then lower the plow 10 relative to the plowing surface and perform a back drag operation. For example, with the trip blade 20 disposed in the extended position, as the vehicle moves the plow 10 in a reverse direction, such as along direction 44, the trip blade 20 can pull material, such as snow, from the plowing surface 47. As such, the plow 10 is configured to remove material, such as snow, from a relatively narrow area in an efficient manner.

[0029] In one arrangement, the back drag system 18 can include a trip blade position indicator which is configured to identify the rotational positon of the trip blade 20 relative to the plow 10. In one arrangement, as shown in FIG. 5, the back drag system 18 can include, as the trip blade position indicator, a visual trip blade position indicator 50. For example, the visual trip blade position indicator 50 can be configured as a rod or shaft having a first end 52 coupled to the trip blade 20 and a second end 54 extending form the plow body 11 and having markings 56, 58, 60 which correspond to the rotational position of the trip blade 20 relative to the plow body 11.

[0030] Prior to operation of the back drag system 18, the visual trip blade position indicator 50 is positioned such that only the first marking 56 is observable by the vehicle operator. Visual identification of the first marking 56 can indicate to the vehicle operator that the trip blade 20 is disposed in the operational or plowing position as shown in FIGS. 1 and 2. When the operator engages the back drag system 18, as the back drag system 18 rotates the trip blade 20 relative to the plow 10 along direction 15, the visual trip blade position indicator 50 travels along direction 65 such that the second marking 58 can be observed by the vehicle operator. Visual identification of the second marking 58 indicates that the trip blade 20 is rotating toward the second back drag position as shown in FIGS. 3 and 4. Further operation of the back drag system 18 causes further translation of the visual trip blade position indicator 50 along direction 65 such that the third marking 60 is observable by the vehicle operator. Such positioning of the second marking 58 indicates that the trip blade 20 has rotated toward the second back drag position as shown in FIGS. 3 and 4 and that the operator can power down the actuation mechanism 30 to set the final positon of the trip blade 20.

[0031] While the trip blade position indicator 50 is described as a visual indicator, such description is by way of example only. In one arrangement, the trip blade position indicator 50 can be configured as an electronic or mechanical indicator. Further, in one arrangement, the trip blade position indicator 50 can include a feedback mechanism which is configured to power down the actuation mechanism 30 once the trip blade 20 has rotated toward the second back drag position as shown in FIGS. 3 and 4.

[0032] As provided above, the back drag mechanism 25 can be configured in a variety of ways. In one arrangement, with reference to FIGS. 6-8, the back drag mechanism 25 can include one or more vertically-oriented plates 70. For example, as shown in FIG. 6, each plate 70 can define a slot 72 configured to couple with a lip of the trip blade 20 at a rear portion 14 of the plow body 11. As indicated in FIGS. 7 and 8, such coupling orients the plate 70 in a substantially vertical orientation relative to the trip plate 20 and allows the back drag mechanism 25 to be disposed adjacent to the blade return device 21 (e.g., compression springs 22). Further, each plate 70 can define an opening 74 configured to receive a connecting element 75, such as a pin. As indicated in FIGS. 7 and 8, the connecting element 75 is coupled to the first plate 70-1 and the second plate 70-2 and disposes the plates 70-1, 70-2 at a distance from each other. The connecting element 75 extends between the two plates 70 and is attached to the actuation mechanism 30 via cable 34.

[0033] During operation, of the vehicle operator can activate the actuation mechanism 30 to cause the winch 32 and cable to generate a load on the connecting element 75 of the back drag mechanism 25. Such loading causes the plates 70-1, 70-1 to rotate the trip blade 20 towards a rear portion 14 of the plow 10 which, in turn, causes the trip blade 20 to compress the compression springs 22. When the trip blade 20 reaches an extended back drag position relative to the plow 10, the back drag system 18 maintains the compression springs 22 in a compressed state, which mitigates rotation of the trip blade 20 toward the front portion 12 of the plow 10 during a back drag procedure. Following the back drag procedure, the vehicle operator can activate the actuation mechanism 30 to cause the winch 32 and cable to reduce the load on the connecting element 75 of the back drag mechanism 25 to position the trip blade 20 to a plowing position, such as shown in FIG. 7.

[0034] While various embodiments of the innovation have been particularly shown and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the innovation as defined by the appended claims.