Device for improving stress of main shaft of jaw crusher

Abstract

The utility model discloses a jaw crusher main shaft stress improving device which comprises a rectangular movable bottom plate and a main shaft installed at the bottom of the movable bottom plate, the main shaft is a square main shaft, and the two ends of the main shaft are each provided with a cylindrical section protruding outwards. An embedding groove is formed in the lower portion of the front face of the movable bottom plate, a first double-key groove hole set is formed in the embedding groove, and a second double-key groove hole set is formed in the embedding face, embedded into the embedding groove, of the main shaft. The double-key slotted holes are additionally formed in the main shaft and the movable bottom plate, so that the keys bear shear force, and bolts at the joint of the main shaft and the movable bottom plate are prevented from bearing axial shear force.

Description

TECHNICAL FIELD

[0001] The utility model relates to the device of improving the stress of the main shaft of jaw crusher. BACKGROUND

[0002] The crusher is realized crushing function through the meshing extrusion of two side toothed plates, one side of the crusher is fixed toothed plate, the other side is movable toothed plate, wherein the movable toothed plate is connected with movable base plate first, the movable base plate is linked with the main shaft, through the control of the rotation of the main shaft at certain angle, the meshing extrusion crushing castings is realized, the main shaft connecting place is located at the bottom, during the crushing extrusion process, the shear force of the root is the biggest, if the connecting bolt of the main shaft and movable base plate cannot be normally overhauled in time during the long-term use, the fixed bolt is loosened because of the vibration caused by extrusion, when the multiple bolts are loosened, the connecting surface between the movable base plate and the main shaft produces gap, the connecting bolt is broken by shear force, further makes the movable base plate and the main shaft separate, the service life of the crusher is affected. SUMMARY

[0003] In view of the above problems, the utility model aims at providing the device of improving the stress of the main shaft of jaw crusher to improve the service life of the crusher.

[0004] The technical scheme of the utility model is as follows

[0005] The device of improving the stress of the main shaft of jaw crusher, including the movable base plate of rectangle and the main shaft installed at the bottom of movable base plate, the main shaft is square main shaft, both ends of main shaft are equipped with the cylindrical section that protrudes outward, the front lower part of movable base plate is equipped with the embedding groove, is equipped with the first double key groove group in embedding groove, the embedding surface of main shaft embedding embedding groove is equipped with the second double key groove group.

[0006] The first double key groove group is composed of two first groove holes oppositely arranged in the embedding groove, and the second double key groove group is composed of two second groove holes oppositely arranged on the embedding surface of the main shaft.

[0007] The movable base plate is uniformly distributed with at least four connecting seats above the connecting place of the movable base plate and the main shaft.

[0008] The connecting seat is composed of vertical plate and horizontal plate L-shaped, and a triangular support block is arranged in the center.

[0009] The upper part and the lower part of the back of the movable base plate are each provided with a strip-shaped groove, and a group of key grooves are arranged in the strip-shaped groove.

[0010] A plurality of mounting holes are arranged on the inner wall of the embedding groove.

[0011] Compared with the prior art, the main shaft and the movable bottom plate are provided with double-key grooves, the key bears the shearing force, and the axial shearing force of the bolt at the connecting position of the main shaft and the movable bottom plate is avoided.

[0012] 2. The movable bottom plate is provided with an embedded groove, the main shaft is embedded with the movable bottom plate, the radial shearing force is reduced, and the radial shearing force of the bolt at the connecting position of the main shaft and the movable bottom plate is avoided.

[0013] 3. Four connecting seats are arranged on the movable bottom plate and the upper side of the main shaft, and the radial shearing force of the crusher is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structural schematic view of the utility model;

[0015] Figure 2 is a double-key groove structure schematic view of the utility model;

[0016] Figure 3 is a three-dimensional structure schematic view of the utility model;

[0017] Figure 4 is a key groove structure schematic view of the utility model;

[0018] In the drawings, 1 is a movable bottom plate, 2 is a main shaft, 3 is a cylindrical section, 4 is a first groove, 5 is a strip-shaped groove, 6 is a connecting seat, 7 is a vertical plate, 8 is a horizontal plate, 9 is a triangular supporting block, 10 is an embedded groove, 11 is a mounting hole, and 12 is a key groove. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme of the embodiments of the utility model will be described clearly and completely in combination with the drawings of the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0020] Referring to Figure 1The application discloses an improved device for the stress of a main shaft of an eccentric crusher, which comprises a rectangular movable base plate 1 and a main shaft 2 installed at the bottom of the movable base plate. The main shaft is a square shaft, and the two ends of the main shaft are provided with outwardly protruding cylindrical sections 3. A first double-key groove group is arranged in a embedding groove 10 arranged at the front lower part of the movable base plate, and a second double-key groove group is arranged on the embedding surface of the main shaft embedded in the embedding groove. The embedding groove is arranged on the movable base plate, the main shaft is embedded in the embedding groove, the radial shearing force is reduced, and the bolts at the connecting position of the main shaft and the movable base plate are prevented from loosening due to the radial shearing force. The double-key groove groups are arranged on the main shaft and the movable base plate, the double-key groove groups bear the shearing force, and the bolts at the connecting position of the main shaft and the movable base plate are prevented from loosening due to the axial shearing force.

[0021] The first double-key groove group is composed of two first grooves 4 oppositely arranged in the embedding groove, and the second double-key groove group is composed of two second grooves oppositely arranged on the embedding surface of the main shaft. The first grooves and the second grooves are in one-to-one correspondence.

[0022] At least four connecting seats 6 are uniformly arranged on the movable base plate above the connecting position of the movable base plate and the main shaft. The four connecting seats are arranged on the movable base plate and the main shaft, and the radial shearing force of the crusher is reduced.

[0023] The connecting seat is composed of a vertical plate 7 and a horizontal plate 8 in an L shape, and a triangular supporting block 9 is arranged in the center of the connecting seat. The vertical plate is arranged on the movable base plate, the horizontal plate is arranged on the connecting seat of the main shaft, the triangular supporting block provides stable supporting force to reduce the shearing force, and the vertical plate, the horizontal plate and the triangular supporting block are fixed through bolts.

[0024] Strip-shaped grooves 10 are arranged on the upper part and the lower part of the back of the movable base plate, a group of key grooves is arranged in each strip-shaped groove, and each group of key grooves is composed of two key grooves 12 oppositely arranged. During late assembly, the strip-shaped grooves and the key grooves are matched to facilitate positioning.

[0025] A plurality of mounting holes 11 are arranged on the inner wall of the embedding groove. The mounting holes facilitate the assembly of the main shaft and the movable base plate.

Claims

1. An improvement in the stress of the main shaft of an eccentric crusher, characterized in that, The utility model discloses a rectangular movable base and a main shaft installed at the bottom of the movable base, the main shaft is a square main shaft, and the two ends of the main shaft are provided with outwardly protruding cylindrical sections; a first double-key slot group is arranged in the embedded groove, and a second double-key slot group is arranged on the embedded surface of the main shaft embedded in the embedded groove.

2. The improvement of the stress of the main shaft of the jaw crusher according to claim 1, characterized in that, The first double-key slot group is composed of two first slots oppositely arranged in the embedded groove, and the second double-key slot group is composed of two second slots oppositely arranged on the embedded surface of the main shaft.

3. The jaw crusher main shaft stress improvement device according to claim 1, characterized in that, At least four connecting seats are uniformly distributed on the movable base above the connecting position of the movable base and the main shaft.

4. The improvement of the stress of the main shaft of the jaw crusher according to claim 3, characterized in that, The connecting seat is composed of a vertical plate and a horizontal plate in an L shape, and a triangular supporting block is arranged in the center.

5. The jaw crusher main shaft stress improvement device according to claim 1, characterized in that, A strip-shaped groove is arranged on the upper and lower parts of the back of the movable base, and a group of key slot groups are arranged in the strip-shaped groove, and each group of key slot groups is composed of two oppositely arranged key slots.

6. The jaw crusher main shaft stress improvement device of claim 1, wherein, A plurality of mounting holes are arranged on the inner wall of the embedded groove.

Images