Device for mounting/dismounting a connecting pin used for an end-to-end assembly of two frame elements

Patent metadata

Field	Value
Publication number	US-11951577-B2
Application number	US-202217987849-A
Country	US
Kind code	B2
Filing date	Nov 15, 2022
Priority date	Nov 15, 2021
Publication date	Apr 9, 2024
Grant date	Apr 9, 2024

Abstract

A mounting/dismounting device for mounting/dismounting a connecting pin used for an end-to-end assembly of two frame elements includes a mounting/dismounting rod having a longitudinal axis, a head adapted to cooperate with a screwdriver, and a rod body having a proximal portion and a threaded distal portion. The device also includes a base supporting a nut and having an abutment portion shaped to bear on one of the two frame elements, the threaded distal portion being provided to be screwed into the nut, a proximal stop mounted freely in rotation on the proximal portion of the rod body, and a bushing mounted around the rod body between the nut and the proximal stop.

First claim

The invention claimed is:

1. A mounting/dismounting device for mounting/dismounting a connecting pin used for an end-to-end assembly of two frame elements of a crane structure, the mounting/dismounting device comprising:
a mounting/dismounting rod having a longitudinal axis, a head adapted to cooperate with a screwdriver, and a rod body having a proximal portion prolonging the head and a threaded distal portion which terminates in a free end;
a base supporting a nut and having an abutment shaped to bear on one of the two frame elements, the threaded distal portion being provided to screw into the nut aligned with the longitudinal axis;
a proximal stop mounted freely in rotation on the proximal portion of the rod body around the longitudinal axis;
a bushing which is removable and mounted freely in translation along the longitudinal axis around the rod body between the nut and the proximal stop, the bushing having a first open end and a second open end;
wherein the mounting/dismounting device is configurable in:
a mounting configuration in which the bushing is in abutment against the proximal stop; and
a dismounting configuration in which the bushing is in abutment against the base or the nut.

2. The mounting/dismounting device according to claim 1 , wherein the base comprises a support sleeve aligned with the longitudinal axis and having an open proximal end and a opposite open distal end, the support sleeve internally supporting the nut, wherein:
in the mounting configuration, the nut is blocked in rotation and is guided in translation along the longitudinal axis; and
in the dismounting configuration, the nut is blocked in rotation and is blocked in translation along the longitudinal axis.

3. The mounting/dismounting device according to claim 2 , wherein at least one longitudinal groove is provided on the support sleeve, the longitudinal groove extending parallel to the longitudinal axis, and the nut is secured to at least one guide pin which, in the mounting configuration, is engaged in the corresponding longitudinal groove to block the nut in rotation and guide the nut in translation along the longitudinal axis.

4. The mounting/dismounting device according to claim 3 , wherein the at least one longitudinal groove is extended, on a side of the open distal end of the support sleeve, by a circumferential groove which is followed by a locking groove having an “L” shape so that, in the dismounting configuration, the at least one guide pin is engaged in the locking groove to block the nut in rotation and in translation along the longitudinal axis.

5. The mounting/dismounting device according to claim 2 , wherein the base comprises a proximal wall, secured to the proximal end of the support sleeve, the proximal wall having a bearing relief which forms the abutment shaped to bear on one of the two frame elements.

6. The mounting/dismounting device according to claim 5 , wherein the bearing relief is in the form of two linear stops facing each other, delimiting therebetween a notch into which opens the proximal end of the support sleeve.

7. The mounting/dismounting device according to claim 2 , wherein the base comprises a mechanical lock mounted on the distal end of the support sleeve and cooperating with the free end of the rod body of the mounting/dismounting rod in the mounting configuration, in order to axially block the rod body along the longitudinal axis.

8. The mounting/dismounting device according to claim 2 , wherein the base comprises one or several magnets disposed on the abutment to hold by magnetization the base on one of the two frame elements.

9. The mounting/dismounting device according to claim 1 , wherein the base comprises a cradle having an arched shape and provided with a proximal plate and a distal plate facing each other and connected by a spar, the spar forming the abutment shaped to bear on one of the two frame elements.

10. The mounting/dismounting device according to claim 9 , wherein the proximal plate and the distal plate respectively comprise a proximal orifice and a distal orifice aligned with the longitudinal axis, the distal orifice being secured to the nut, and wherein the proximal stop and the bushing are adapted to pass inside the proximal orifice of the cradle.

11. The mounting/dismounting device according to claim 10 , wherein the proximal plate of the cradle supports a proximal tube internally defining the proximal orifice, the proximal stop and the bushing are adapted to slide inside the proximal tube.

12. The mounting/dismounting device according to claim 10 , wherein the distal plate supports, on an inner face facing the proximal plate, a crown surrounding the distal orifice and which is adapted to receive internally either an enlarged head of the connecting pin in the mounting configuration, or the second open end of the bushing in the dismounting configuration.

13. The mounting/dismounting device according to claim 9 , wherein the bushing is secured to a radial extension arm adapted to be engaged into a window formed in the spar of the cradle, in order to block the bushing in rotation in the dismounting configuration.

14. The mounting/dismounting device according to claim 13 , wherein the radial extension arm is provided with a free end cooperating with a locking pin, to lock the radial extension arm in the window of the spar.

15. The mounting/dismounting device according to claim 1 , wherein the proximal stop is blocked in translation along the proximal portion of the rod body, against the head of the mounting/dismounting rod.

16. The mounting/dismounting device according to claim 15 , wherein the proximal portion of the rod body has a circumferential recess, and the proximal stop is blocked in translation by means of two pins which pass through the proximal stop to be engaged in the circumferential recess in a diametrically opposite manner with respect to the longitudinal axis.

17. The mounting/dismounting device according to claim 1 , wherein the proximal stop is guided in rotation by a running gear mounted around the proximal portion of the rod body.

18. The mounting/dismounting device according to claim 17 , wherein the running gear is interposed between an annular stop, which bears against the head of the mounting/dismounting rod, and an inner shoulder provided in the proximal stop.

19. The mounting/dismounting device according to claim 18 , wherein the annular stop has a concave rear face of hemispherical shape and which bears on a hemispherical bearing surface of the head of the mounting/dismounting rod.

20. A mounting/dismounting system for mounting/dismounting a connecting pin used for an end-to-end assembly of two frame elements of a crane structure, the mounting/dismounting system comprising:
a mounting/dismounting device according to claim 1 ; and
a screwdriver provided with a bit capable of cooperating with the head of the mounting/dismounting rod, in order to be able to rotatably drive the mounting/dismounting rod.

21. An assembly kit for an end-to-end assembly of two frame elements of a crane structure, the assembly kit comprising:
a mounting/dismounting device according to claim 1 ; and
at least one connecting pin adapted to pass through a connecting hole passing through the two frame elements;
wherein the connecting pin has a tubular shape so that the mounting/dismounting rod can pass through it, and the connecting pin has a distal end provided with an enlarged head and a proximal end, which are opposite to each other.

Assignees

• Manitowoc Crane Group France

Inventors

• Durand Hugues

Classifications

• B23P19/04 Primary

  for assembling or disassembling parts · CPC title

• B23P19/022

  Extracting or inserting relatively long parts · CPC title

• B25B27/023 Primary

  using screws · CPC title

• B66C23/286

  with locking devices · CPC title

• B25B31/00 Primary

  Hand tools for applying fasteners (nailing or stapling tools B25C) · CPC title