RU2700285C1 - Bench for measurement of soil cutting resistance force - Google Patents

Abstract

FIELD: measurement technology.

SUBSTANCE: invention relates to measurement of soil resistance digging. Proposed bench comprises supports, levers, guide rails, strain gage, drive with traction winch and screw drive. Guiding rails are connected to levers for inclination of strain-gauge trolley with working element. One end of levers forms an axis of rotation with supports, the second end of levers is connected to drive rods with screw thread, which are equipped with support and lifting nuts with angles. Driving rods are connected to supports, and supports with holes at the edges are connected to the base, the working member is connected to the holder of the tenzometric trolley, which on one side forms an axis of rotation with the frame of the tenzometric trolley, and on the other side of the holder there is a hole which is coaxially fixed with holes on the frame by means of a bolt joint for changing the angle of gripping of the working member.

EFFECT: possibility of changing the gripping angle and inclination of the earthmoving machine working tool and possibility of working in laboratory or field conditions.

4 cl, 6 dwg

Description

The present invention relates to techniques for measuring soil resistance to digging and can be used to determine the forces acting on the working body of an earth moving machine.

From the existing level of technology, a stand is known for studying the cutting conditions of the soil by the working body of the digging machine (SU 397797, publ. 09/17/1973), which includes a ground container with a frame mounted on it with guide rails along which the strain gauge trolley moves. The disadvantage of this technical solution is the installation of the drive on the strain gauge trolley, this increases the weight of the strain gauge trolley, its inertia during movement and resistance to movement. The design of the stand does not allow you to change the angles of inclination and capture of the working body of the digging machine.

Closest to the claimed technical solution is a stand for measuring the resistance of soils and snow-ice formations to cutting (RU 2461809, publ. 09/20/2012), which is equipped with a base on which is mounted a rigid holder with a cutting body pivotally connected to the frame mounted on it brackets, horizontal rods and with strain gauges installed on them, recording the components of the cutting force. The disadvantages of this technical solution is the difficulty of changing the angle of capture of the working body, since for this it is necessary to remove the working body together with the holders, also the design of the stand does not allow changing the angle of inclination of the working body.

The technical result of the claimed invention is the ability to change the angle of capture and tilt of the working body of the digging machine and the ability to carry out work in laboratory or field conditions.

The claimed technical result is achieved by the fact that the stand for measuring the resistance force of soils to cutting includes supports, levers, guide rails, strain gauge trolley, drive with traction winch, screw drive, while the guide rails are connected with levers for tilting the strain gauge trolley with a working body, one end levers forms the axis of rotation with bearings, the second end of the levers is connected to the drive rods with screw threads, which are equipped with support and lifting nuts with angles, the drive rods with they are joined with supports, and supports with holes at the edges are connected to the base, the working body is connected to the holder of the strain gauge trolley, which on the one hand forms the axis of rotation with the frame of the strain gauge trolley, and on the other side of the holder there is a hole that coaxially fixes with holes on the frame when help bolted connections to change the angle of capture of the working body.

In order to conduct experiments on the bench in laboratory and field conditions, the drive with a traction winch can be mounted on a platform that is attached to one of the levers.

In order to measure the strength of soil resistance to cutting by the working body of the digging machine, the strain gauge link is connected between the strain gauge trolley and the hook of the traction winch.

The basis for the installation of the stand may be the ends of screw piles or sides of the soil channel.

The invention is illustrated by drawings, which depict: FIG. 1 - stand; FIG. 2 - a mechanism for changing the angle of the rails; FIG. 3 - strain gauge trolley; FIG. 4 - strain gauge trolley, type A; FIG. 5 - strain gauge trolley, side view; FIG. 6 - rod with screw thread and drive.

Before work, the strain gauge trolley 1 (Fig. 1) is mounted on rails 2, which are rigidly connected to the levers 3 for tilt, a platform with a drive for the strain gauge trolley 1 is rigidly mounted on one of the levers 3, the strain gauge trolley is equipped with a plate 4 with corners 5 (FIG. 3) and link 6 for connection through a strain gauge link 7 to the hook 8 of the drive. The levers 3 from the side of the short arm are connected coaxially with the supports 9 (Fig. 2, 6), on the other hand, the levers 3 are connected through the corners 10 and nuts 11 to two screw drives, which are connected through the corners 12 and nuts 13 to the supports 9, which then rigidly connected to the base in the form of ends of screw piles or sides of the soil channel, after which the holder 14 with the working body 15 is installed on the frame 16 of the strain gauge trolley 1.

The strain gauge trolley 1 consists of support rollers 17, which are rigidly connected to design positions on elements 18, 19, 20, two sheets 18, rigidly connected through plates 19 to which corners 21 are welded along their entire length and plates 20, which are connected to sheets 18 through corners 22 by a rigid connection, plates 4 with corners 5 welded to it, which rigidly connects to the sheets 18, link 6, which connects to the plate 4, racks 23, which are rigidly connected to the plates 20, of the frame 16, which connects to the racks 23 , holder 14 on which the working body 15 is poured and on the one hand forms the axis of rotation on the frame 16 for changing the working angle of the working body (Fig. 4), and on the other hand, the holes on the holder 14 and the frame 16, which are coaxially fixed with a detachable connection to define a certain working angle of the working body fifteen.

The traction drive (Fig. 1) consists of a hook 8, a cable 24, a drum 25, a gearbox 26, a motor 27.

The screw drive (Fig. 2) consists of a corner 12 on which the gear motor 28 is rigidly mounted, a rod 29 which is connected to the corner 12 by nuts 13, so as to ensure only rotation of the rod 29 (Fig. 6), also the rod 29 is rigidly connected with the output gear (not shown in the diagram) of the gear motor 28 and is its axis of rotation, the nut 11 is rigidly connected to the corner 10 and screwed onto the rod 29, stroke limiter 30, which is then rigidly connected to the rod 29.

The lever 3 (Fig. 2) is made L-shaped so that the axis of rotation of the working body 15 in a vertical plane is close to the axis of rotation of the lever 3 and is made of steel sheet and a corner is welded to it for stiffening and fastening the rails 2.

The stand works as follows. The strain gauge trolley 1 is rolled out to its initial position, the holder 14 with the working body 15 is rotated and fixed on the frame 16 with the required angle of capture, using screw rods 29 that rotate synchronously, we tilt the rails 2 with the strain gauge trolley 1 to the required angle. The traction drive is turned on and hook 8 through the strain gauge link 7 pulls the strain gauge trolley 1 and its readings are transmitted to the measuring complex for recording.

Thus, the proposed technical solution allows testing of working bodies at various capture and tilt angles in laboratory or field conditions.

Claims (4)

1. A stand for measuring the resistance force of soils to cutting, including supports, levers, guide rails, strain gauge trolley, drive with traction winch, screw drive, characterized in that the guide rails are connected with levers for tilting the strain gauge trolley with a working body, one end of the levers forms axis of rotation with bearings, the second end of the levers is connected to drive rods with screw threads, which are equipped with support and lifting nuts with corners, then the drive rods are connected to the supports, and the supports from versts at the edges are connected to the base, the working element is connected to the holder of the strain gauge trolley, which on the one hand forms the axis of rotation with the frame of the strain gauge trolley, and on the other side of the holder there is a hole that is coaxially fixed to the holes on the frame using a bolt joint to change the grip angle working body. 2. A stand for measuring the resistance force of soils to cutting according to claim 1, characterized in that the drive with a traction winch are mounted on a platform that is attached to one of the levers. 3. A stand for measuring the resistance force of soils to cutting according to claim 1, characterized in that the strain gauge link is connected between the strain gauge trolley and the hook of the traction winch. 4. A stand for measuring the strength of soil resistance to cutting according to claim 1, characterized in that the basis for installing the stand are the ends of screw piles or sides of the soil channel.

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