towable backhoe hydraulic pump pricelist

I live in southern Alberta, Canada. I had Jansen USA ship the purchased backhoe to a Montana shipping warehouse. It was stored there until I drove down with a trailer to pick it up. Three warehouse lads and a dollie helped me lift the large wooden box it comes in into the trailer. At the Canadian customs crossing the officers charged me GST on the purchase price (remember to take your payment receipt with you). Other Canadian provinces will charge PST as well. There was no foreign duty.

This machine is a workhorse. I bought it to renovate an old road on my property; however, once the backhoe was operational I found all sorts of other jobs for it to do including crudely leveling my back yard for a brick patio, creating a ramp to the front door, and digging out a compost pit. It has also been towed to a friend’s garden to do work there. I bought the unit in March 2020 (just before the border closed) and it has been heavily used during the months the ground wasn’t frozen. It is now November 2021 and I am finishing up the old road. If the backhoe is moving itself forward I sit on the seat to drive it. When doing a stationary job, such as filling wheelbarrows, I often stand beside the seat and operate it from the side. When working in the hot sun, I attached a flexible camp chair umbrella to the backhoe seat for shade. I made wooden shoes for the foot spikes when walking the machine across my asphalt driveway.

The machine has been used a lot and I have had to replace a few nuts and an hydraulic hose as they wore out. They were a standard size and easy to find at the local hardware store. Important points to remember are to replace the hydraulic fluid periodically and lubricate moving parts, as suggested in the manual.

The present application is directed to earth moving equipment, especially hydraulically driven backhoes, that are towable to a job site and, thereafter, convertible to a hydraulically driven and self propelled vehicle.

In the field of construction equipment, various equipment for earth moving are often either track mounted type vehicles or hydraulically driven wheeled vehicles that are not suitable for driving directly over roads, in the case of the track driven equipment because they tear up the roadway and are not designed for high speeds and in the case of the hydraulic driven equipment because they are not designed to drive at higher speeds. Consequently, such equipment is often carried to a job site on a trailer or the like. This increases the cost of the equipment in that a trailer is always required. The need for a trailer complicates transfer to the job site and the trailer requires a separate towing vehicle.

Another problem with such devices is that when hydraulic drives are utilized, the hydraulic system does not lend itself to be towed and the hydraulic units with transmissions are relatively very expensive. Therefore, it is desirable to have a backhoe or other earth working equipment that can be easily towed at highway speeds by another vehicle, such as a pickup truck, and that can be operated at a job site by hydraulic systems that are easy to use and relatively inexpensive. SUMMARY OF THE INVENTION

An earth working device, especially a backhoe, includes a frame, a motor and an articulated arm with a scoop or bucket for digging in the ground. The earth working device is self-propelled at the work site and has at least two wheels that are driven by hydraulic drives. Preferably, the drive wheels are located at the same or front end as the articulated arm and bucket.

The device is convertible between a work configuration wherein the device is self propelled with all wheels on the ground and wherein at least two of the wheels are driven by hydraulic motors to a towing configuration wherein only one set of wheels is ground engaging and the hydraulic system associated with the drive wheels is disabled so that the drive wheels are free turning. The non driven set of wheels are swingable or moveable between direct ground engagement in the work configuration to a raised position in the towing configuration. A tongue allows the device to be joined to a conventional ball type hitch on the rear of a towing vehicle, such as a pickup truck.

The hydraulic motor that powers the drive wheels is operated by a seated operator through a hydraulic control system by levers and is driven by a hydraulic pump operated by a gasoline driven motor. Output from each hydraulic motor is not directly transferred to the drive wheels, but rather is transferred by a drive chain to a respective wheel shaft that is joined to a wheel. Each wheel includes a lockout hub that allows an operator to selectively engage the wheels with the drive shaft or to disengage the wheels, leaving them freely rotating, for towing. Each motor is non axially aligned with a respective drive shaft and a gear reduction mechanism is included between the motor output and a respective wheel drive shaft. OBJECTS OF THE INVENTION

Therefore, the objects of the invention are: to provide an inexpensive backhoe that can be hydraulically self driven at a job site, but which can also be easily towed between job sites by a towing vehicle without requiring a trailer for the backhoe; to provide such a backhoe that includes a hydraulic motor for each drive wheel which is axially offset from the support shaft for the drive wheel; to provide such a backhoe wherein the drive wheels include lock outs that allow an operator to selectively connect with the drive wheels to associated hydraulic motors when in a job site or work configuration or to disconnect from the motors and freewheel when in a transit or towing configuration; to provide such a backhoe having rear wheels that can be taken out of contact with the road when in the transit or towing configuration and especially can be raised relative to a frame of the backhoe; and to provide such a backhoe which is easy to use, inexpensive to produce and especially suited for the intended usage thereof.

The reference numeral 1 generally designates a towable and hydraulically driven backhoe in accordance with the present invention. The backhoe 1 is shown in FIG. 2 being towed by a towing vehicle or truck 3.

The backhoe 1 includes a frame 10 supported on a pair of front wheels 12 and a pair of rear wheels 13. Attached to the frame 10 is a hydraulically operated articulated arm 15 terminating in a digging bucket or scoop 16. Mounted on the frame 10 is an engine 20 and a seat 21 for supporting a driver 23 at a hand operated hydraulic control system 25. The frame 10 also supports a pair of positional stabilizing legs 29 and 30.

Each rear wheel mounting structure 36 includes a connecting member 40 that has a distal end terminating in a cylinder or pivot 42. The pivot 42 is sized and shaped to be snugly but pivotally received in and pass through a receiving bore 45 in the cross beam 32. A sleeve 46 is received over the pivot 42 above the cross beam 32, when the backhoe 1 is configured for digging as in FIGS. 1 and 3. A keeper pin 48 is received through an aperture 49 in the pivot 42 to secure the cylinder 42 in the bore 45 during use.

The mounting structure 36 further includes a cross arm 52 extending from the connecting device 40 which is in turn connected to a depending armor strut 53. The strut 53 has a horizontally aligned axle 55 upon which a hub 58 of a respective rear wheel 13 is mounted. To convert to a transport configuration, such as is seen in FIG. 2, the keeper pin 48 is removed and the mounting structure 36, along with an associated wheel 13 is removed from the cross beam 32 by sliding downwardly (which may require lifting the rear of the backhoe 1), rotated one hundred and eighty degrees and then the pivot 42 is replaced in the bore 45 and secured therein in reverse to the normal operating configuration by replacing the keeper pin 48. In this manner, the rear wheels 13 project above the frame 10 in the transport configuration so as to be stowed for transport.

The front wheels 12 and the rear wheels 13 each include a rubber ground engaging tire 60. The tires 60 of the front wheels 12 are suitable for supporting the backhoe 1 during transit while being pulled by the vehicle 3 on a road or highway at normal driving speeds for public roads and the like.

The articulated arm 15 has a first segment 65 pivotally mounted on a front mount 66 of the frame 10. The angle of the first segment 65 relative to the ground is controlled by a first hydraulic cylinder 68 that is mounted between the first segment 65 and the front mount 66. The arm 15 also has a second segment 70 that is pivotally mounted at respective ends thereof to a distal end of the first segment 65 and the scoop 16. A second hydraulic cylinder 72 mounted between the first segment 65 and the second segment 70 controls the position of the later with respect to the first segment 65. A third hydraulically controlled cylinder 75 is connected between the second segment 70 and the scoop 16 so as to control the position of the scoop 16 relative to the second segment 70.

The illustrated engine 20 is an internal combination engine mounted directly on the frame 10, although it is foreseen that a wide variety of motive devices could be used to power the backhoe 1. Associated with the engine 20 is a hydraulic pump 80 that is joined to the control manifold 25 by hydraulic supply hose 81 and is connected to a hydraulic fluid return hose 82. Each of the stabilizing legs 29 and 30 is pivotally mounted on the frame 10 and each is controlled by a respective hydraulically operated cylinder 85. Hydraulic systems of this type are well known in the hydraulic art and further description thereof is not required herein to allow one having ordinary skill in the art to make use of this part of the invention.

Mounted on the side wall 94 is a hydraulic motor 97 having a feed hydraulic line 98 and a return hydraulic line 99. The hydraulic lines 98 and 99 are respectively connected to the supply hose 80 and return hose 81 through which flow of hydraulic fluid is controlled by the operator control system 25 which functions conventionally.

The hydraulic control manifold 25 provides the operator 23 with a plurality of control levers 172 for selectively allowing hydraulic fluid under pressure produced by the hydraulic pump 80 to control the three articulated arm cylinders 68, 72 and 75, the stabilizing leg control cylinders 85 and the wheel drive motors 97.

In use, the rear wheels 13 are configured as shown in FIG. 1 and the stabilizing legs 29 and 30 are positioned to allow movement when raised and stabilize when lowered against the ground. The articulating arm 15 is operated to maneuver the scoop 16 as needed. When it is desired to move at the job site, the wheel lock out assemblies 125 are locked, so that the front wheels 12 must rotate with the shaft 107 and the hydraulic motors 97 are then individually activated as needed to move the backhoe 1 to a new location by selectively rotating the front wheels 12.

When it is desired to move the backhoe 1 between job sites, the rear wheels 13 are removed from the crossbeam 32 rotated one hundred and eighty degrees and replaced so that respective pivots 42 are upside down in the bores 45 and the keeper pins 48 are used to secure them there. The wheel lock out assemblies 125 are manipulated to the unlocked configuration to allow the front wheels 12 to freewheel or rotate relative to the shaft 107. The hitch 62 is joined to the towing ball 63 on the towing vehicle 3, as shown in FIG. 2 and the backhoe 1 is then pulled on conventional roads and highways by the vehicle 3 to a new job site.

The 14.5 FPT DR Towable Backhoe has power to spare for trenching, landscaping, stump removal, heavy lifting and more. Designed especially for the most demanding digging tasks, this machine is self-powered with its own hydraulic system, so there’s no fussing with a 3-point hitch or hydraulic connections.

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