CN206468682U - Crane pin shaft component - Google Patents

Abstract

This utility model discloses a crane pin assembly, relating to the field of crane machinery technology. It includes a pin and a pin pressure plate, the pin pressure plate being connected to the pin by bolts. The end face of the pin has a groove, the outline of which has at least one straight edge. The pin pressure plate has an insertion portion matching the groove, the outer diameter of the pin pressure plate being larger than the outer diameter of the pin. A support member is provided on the outer wall of the pin, and the pin pressure plate is connected to the support member by bolts. This utility model solves the problems of low anti-rotation capability and easy axial movement in existing pin assemblies.

Description

Crane pin assembly

technical field

The utility model relates to the technical field of hoisting machinery equipment, in particular to a pin shaft assembly used for the hinged connection of crane structural parts.

Background technique

The existing pin assembly used for the hinged connection of crane structural parts mainly includes a pin shaft and pin pressure plates connected to both ends of the pin shaft by bolts, wherein the pin shaft is a cylindrical structure with two ends being flat, and the pin shaft pressure plate is a flat circular plate. There are bolt holes at the center of both ends of the pin shaft, and the pin shaft pressing plate is fixed by a single bolt connection. The pin assembly of this structure is only suitable for the hinged connection of small and medium-sized crane structural parts. If it is applied to the pin installation of large structural parts of large cranes, there will be the following defects that bring uncertain safety factors in practical applications: 1. The pin shaft is prone to tangential rotation, thereby causing the pin shaft pressing plate to fail; 2. The axial tension of a single bolt is large, which is prone to axial movement, and the pin shaft pressing plate cannot resist rotation.

Utility model content

The purpose of the utility model is to provide a crane pin assembly, which can solve the problems of low anti-rotation ability and easy axial movement in the existing pin assembly.

In order to solve the above problems, the technical solution adopted by the utility model is: the crane pin assembly includes a pin shaft and a pin shaft pressing plate, the pin shaft pressing plate is connected with the pin shaft through bolts, and the end surface of the pin shaft is provided with A groove, the outline of the groove has at least one side; the pin pressing plate has an insertion portion matching the groove, the outer diameter of the pin pressing plate is larger than the outer diameter of the pin shaft, the The outer wall on the pin shaft is provided with a support piece, and the pin shaft pressing plate is connected with the support piece through bolts.

In the above-mentioned technical solution of the crane pin shaft assembly, a more specific technical solution may also be: the two ends of the groove extend to the outer wall of the pin shaft to form a gap, the pin shaft pressing plate includes a ring portion and the insertion portion, Two ends of the insertion part are respectively connected to the inner edge of the ring part, and the inner diameter of the ring part matches the outer diameter of the pin shaft.

Further, the groove is a straight groove.

Further, the outer edge of the pin shaft is provided with chamfers.

Further, the insertion part is connected to the pin shaft through a bolt, and the annular part is connected to the support member through a plurality of bolts.

Due to the adoption of the above technical solution, the utility model has the following beneficial effects compared with the prior art:

1. A groove is provided on the end face of the pin shaft. The contour line of the groove has at least one straight side. The pin shaft pressing plate is provided with an insertion part matching the groove. Relative rotation is generated; the support is fixed on the outer wall of the pin shaft, and the pin pressure plate is connected to the support by bolts, which can avoid the rotation of the pin pressure plate, thereby improving the anti-rotation ability of the entire pin assembly; the pin pressure plate and the support The connection also avoids the axial transmission of the pin shaft and improves the axial bearing capacity of the pin shaft assembly.

2. The groove extends to the outer wall of the pin shaft to form a gap. The pin shaft pressure plate is designed to match the groove and the outer diameter of the pin shaft. The structure is reasonable and easy to process, locate and disassemble.

3. The annular part of the pin shaft pressing plate is connected with the support member through a plurality of bolts, which can improve the overall stability of the pin shaft assembly.

4. Suitable for 500t, 650t, 800t and other large cranes.

Description of drawings

Fig. 1 is a structural schematic diagram of an embodiment of a crane pin assembly.

Figure 2 is a cross-sectional view of the crane pin assembly.

Fig. 3 is a structural schematic diagram of the pin shaft.

Fig. 4 is a left side view of Fig. 2 .

Fig. 5 is a schematic structural view of the pin pressing plate.

Fig. 6 is a sectional view along A-A direction in Fig. 4 .

detailed description

Below in conjunction with accompanying drawing embodiment the utility model is described in further detail:

The crane pin assembly shown in Figures 1 and 2 includes a pin 1, a pin pressure plate 2, a bolt 3 and a support 4, wherein the bolt 3 is divided into an inner bolt 3-1 and an outer bolt 3-2 according to the installation position. As shown in Figures 3 and 4, both ends of the pin shaft 1 are provided with grooves 1-1, and the outline of the groove 1-1 has at least one straight side. Preferably, the two ends of the groove 1-1 extend to The outer wall of the pin shaft 1 forms a gap. The groove 1-1 in this embodiment is a straight groove, and the groove 1-1 in other embodiments can be a groove body with a structure such as a V-shaped groove; For installation, chamfers 1-3 are provided on the outer edges of both ends of the pin shaft 1; the inner bolt holes 1-2 connecting the inner bolts 3-1 are opened in the center of the two ends of the pin shaft 1, and the outer wall of the pin shaft 1 is close to the chamfer A support 4 is provided at the position 1-3. As shown in Fig. 5 and Fig. 6, the pin pressing plate 2 includes an annular portion 2-2 and an insertion portion 2-1 matching the groove 1-1 of the pin shaft 1, and the inner diameter of the annular portion 2-2 is the same as that of the pin shaft 1. The outer diameters are matched, and the two ends of the insertion part 2-1 are symmetrically connected to the inner edge of the ring part 2-2; the insertion part 2-1 of the pin pressing plate 2 is connected to the pin shaft 1 through the inner bolt 3-1, and the pin pressing plate The annular part 2-2 of 2 is connected with the support member 4 through three outer bolts 3-2, and the three outer bolts 3-2 are evenly distributed.

When installing, align the insertion part 2-1 of the pin pressing plate 2 with the groove 1-1 at one end of the pin shaft 1, and then press the pin pressing plate 2 in the direction of the groove 1-1, when the ring part 2 of the pin pressing plate 2 When the inner edge of -2 is in contact with the pin shaft 1, under the guidance of the chamfer 1-3, the annular part 2-2 of the pin shaft pressing plate 2 can be quickly fitted on the outer wall of the pin shaft 1, when the pin shaft pressing plate 2 is inserted When the part 2-1 is in conflict with the bottom of the groove 1-1, the annular part 2-2 fits with the support 4, and then the insertion part 2-1 is connected with the pin shaft 1 with the inner bolt 3-1, and three The outer bolt 3-2 is connected with the support member 4; the pin pressing plate 2 at the other end of the pin shaft 1 can be installed with the same installation method as above.

Claims (5)

1. a kind of crane pin shaft component, including bearing pin and bearing pin pressing plate, the bearing pin pressing plate are connected by bolt and the bearing pin Connect, it is characterised in that：The end face of the bearing pin is provided with groove, and the contour line of the groove at least has a straight flange；The bearing pin Pressing plate has the insertion section with the matching grooves, and the external diameter of the bearing pin pressing plate is more than the external diameter of the bearing pin, the bearing pin On outer wall be provided with support member, the bearing pin pressing plate is connected by bolt with the support member.

2. crane pin shaft component according to claim 1, it is characterised in that：The two ends of the groove extend to the pin Axle outer wall formation breach, the bearing pin pressing plate includes ring part and the insertion section, and the two ends of the insertion section are linked to respectively The ring part inward flange, the internal diameter of the ring part is engaged with the external diameter of the bearing pin.

3. crane pin shaft component according to claim 2, it is characterised in that：The groove is straight trough.

4. crane pin shaft component according to claim 2, it is characterised in that：The outer rim of the bearing pin is provided with chamfering.

5. the crane pin shaft component according to claim 2 to 4 any claim, it is characterised in that：The insertion section It is connected by a bolt with the bearing pin, the ring part is connected by multiple bolts with the support member.