The mechanism for moving the sweeper paws loading body of the digging machine

 

(57) Abstract:

Usage: when mine sinking strelovymi harvesters. The purpose of the invention is the limit loads resulting in a power transmission mechanism for moving the heating paws accidental pressing arrows Executive body of the paw at the combine. To limit the specified loads the bearings placed on them heats paws installed on the fingers of the crank disk by a spring-loaded sleeve with the possibility of longitudinal movement thereon. 7 Il.

The invention relates to mining and can be used with sinking workings harvesters.

Known jib tunneling machines, loading the body which has a mechanism for moving the sweeper paws, including the crank disks with fingers that have bearings placed on them sweeper paws.

The disadvantage of these structures is the occurrence of significant stress in the power transmission (bearings, gears etc.) the mechanism for moving the sweeper paws at destruction of loaded Executive body of the lower part of working at random pressure housing siramesine sweeper paws accidental pressing arrows Executive body of the paw.

The goal can be achieved due to the fact that the bearing is mounted on the finger by a spring intermediate sleeve with the possibility of longitudinal movement thereon.

In Fig. 1 shows loading the body with the sweeper paws, plan, and Fig. 2 is a side view, and Fig.3 section a-a in Fig.1; Fig.4 the node I in Fig.3; Fig.5-7 diagram of the forces.

Mechanism 1 move the sweeper paws loading body of the digging machine includes a crank disk 2. On the finger 3 of each swivel sweeper installed paw 4, which makes difficult swinging movement relative to the finger 3 on bearings 5, mounted on the sleeve 6, with the possibility of longitudinal movement along the axis of the finger 3. The bottom end 7 of the sleeve 6 abuts through a set of disk springs 8 in the shoulder 9 of the finger 3. Through the cover 10 mounted on the finger 3 and the bearing 5, the inner ring of which rest against the shoulder 11 of the movable sleeve 6, reach pre-compression of the spring set 8 to a predetermined value deformations and forces.

The device operates as follows. When the harvester mechanism 1 move the sweeper paws 4 provides them to a given movement, producing pagrus each specific design parameters of the loading table, specific gravity of the immersed material and the maximum design height of the pile of rocks. These parameters are determined by the vertical load P acting on the legs when so-called free loading, i.e., when the boom of the harvester is not embedded in the pile paged breed and are not faced with paws. Power options spring set of 8 is chosen so that the precompression of the spring set 8 provided the operation of the loading body when free loading breed provided the project with a maximum height of the pile without causing further compression of the spring set, i.e., the force of the preload spring kit 8 Rnexceed the vertical load P acting on the leg 4 from the side of the stack, i.e., Rn> R. Vertical load P is transferred from the legs 4 through the bearing 5, which is fixed in the housing 4 paws through the cover 12 and abuts against the shoulder 11 of the movable sleeve 6, acting on the set of springs 8. Then the vertical load is transmitted through the crank disk 2 and its shaft 13 on the bearings 14 of the inner part of the power transmission (bearings, gears etc.). With the introduction of the arrows 15 Executive body in a pile of rocks (especially in procontact (paw). The paw 4 acts incremental power Pwithby lowering the boom 15 which causes additional compression of the spring set 8 and the movement of the sleeve 6 and the bearing 5 with the sweeper arms 4 down to the choice of the gap between the stationary transfer mechanism 1 sweeper legs and bottom plane 16 feet 4. Any excess power from the action of the arrow 15 on the leg 4, which may reach very high values, is passed directly to the fixed housing of the transfer mechanism 1, and the power transmission (bearings etc) is only an incremental power Pfrom the additional compression of the spring set 8 by size .

Parametric characteristics of the spring kit is recommended to choose so that when additional compression on the value of pressure Pdo not exceed load capacity of the bearings and did not cause tension in the parts of power transmission in excess of the settlement.

Distance1and between the lower plane 16 feet 4 and the upper end 17 of the rotating crank disc 2 exceed i.e.1>

The mechanism for moving the sweeper paws loading body of the digging machine, comprising a crank disk with your fingers, on which the set is on the finger by a spring intermediate sleeve with the possibility of longitudinal movement thereon.

 

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