Spring tightening device, jaw crusher, processing plant of mineral material and method for compressing or decompressing spring loading tie rod in jaw crusher

Patent metadata

Field	Value
Publication number	US-2016303570-A1
Application number	US-201415100848-A
Country	US
Kind code	A1
Filing date	Nov 28, 2014
Priority date	Dec 5, 2013
Publication date	Oct 20, 2016
Grant date	—

Abstract

A method for compressing or decompressing a spring loading a tie rod in a jaw crusher. The tie rod is supported by, at one location, a pendulum of the jaw crusher and, at another location, the jaw crusher's frame through the said spring. The spring is installed between the jaw crusher's frame and a second spring support supported by the tie rod; and the second spring support is moved in relation to the tie rod. A support part of the tightening device and at least two moving screws supported by the support part are arranged to influence the second spring support. The support part is supported by the tie rod through a locking member; and the at least two moving screws supported by the support part are moved to change the distance between the second spring support and the support part.

First claim

1 . A method for compressing or decompressing a spring loading a tie rod in a jaw crusher; which tie rod is supported, at one location, by a pendulum of the jaw crusher and, at another location, by the jaw crusher's frame through the said spring; and the spring being installed at a first section of the spring against a first spring support fastened to the jaw crusher's frame, and at another section of the spring against a second spring support supported by the tie rod; and
the second spring support is moved in relation to the tie rod; the method comprising: arranging the second spring support to be influenced by a support part of a tightening device and at least two moving screws supported by the support part; supporting the support part by the tie rod through a locking member; and rotating the at least two moving screws supported by the support part for changing the distance between the second spring support and the support part.

2 . The method according to claim 1 , further comprising preventing the movement of the support part farther away from the first spring support by the locking member fastened to the tie rod.

3 . The method according to claim 1 , further comprising fastening a female thread to a thread formed in the tie rod as the locking member of the support part.

4 . The method according to claim 3 , wherein said female thread is in the support part or a separate locking part.

5 . The method according to claim 1 , further comprising arranging a thread for each screw supported by the support part in the support part, or supporting by the support part a nut for each moving screw supported by the support part, and moving the moving screw in the thread of the support part or nut.

6 . The method according to claim 1 , further comprising arranging a spacer plate between the second spring support and supporting the at least two moving screws by the support part.

7 . The method according to claim 1 , further comprising supporting the second spring support in relation to the tie rod through a guide bushing fastened to the second spring support.

8 . The method according to claim 1 , further comprising, on compressing the spring, rotating the moving screws in a first direction for a distance required for the compression of the spring.

9 . The method according to claim 8 , further comprising, on decompressing the spring, rotating the moving screws in a second, opposite direction for a distance required for the decompression of the spring.

10 . (canceled)

11 . (canceled)

12 . A spring tightening device for compressing and decompressing a spring loading a tie rod in a jaw crusher, which tightening device comprises a second spring support supportable by the spring; wherein the tightening device comprises:
a support part; at least two moving screws supported by the support part and arranged to influence the second spring support; and a locking member for supporting the support part by the tie rod; and that the distance between the second spring support and the support part is arranged to be changeable by rotating the at least two moving screws supported by the support part.

13 . The spring tightening device according to claim 12 , further comprising as the locking member a female thread formed in the support part or a separate locking part.

14 . The tightening device according to claim 12 , further comprising threads for moving each moving screw supported by the support part in relation to the support part, which threads are arranged in the support part or a nut supported by the support part.

15 . The spring tightening device according to claim 12 , further comprising a spacer plate between the second spring support and the at least two moving screws supported by the support part.

16 . The spring tightening device according to claim 12 , wherein the tightening device comprises a tie rod guide bushing fastened to the second spring support.

17 . The spring tightening device according to claim 12 , wherein two; or three; or four; or five moving screws are arranged in the support part.

18 . The spring tightening device according to claim 13 , wherein the diameter of the thread of the moving screw is smaller than the diameter of the thread of the locking member.

19 . The spring tightening device according to claim 13 , wherein the length of the moving screw is chosen so that the moving distance of the moving screw from a rear position to a front position causes the compression required of the spring.

20 . A jaw crusher comprising:
a pendulum; a toggle plate, the pendulum being supported to a frame of the crusher through the toggle plate; a tie rod fastened between the pendulum and the frame of the jaw crusher; a spring for loading the tie rod and pulling the pendulum with the tie rod against the toggle plate; a first spring support fastened to the jaw crusher's frame; the said spring being installed at a first section of the spring against the first spring support; and a tightening device comprising: a second spring support against which a second section of the spring is installed; a support part; at least two moving screws supported by the support part and arranged to influence the second spring support; and a locking member for supporting the support part by means of the tie rod; wherein the distance between the second spring support and the support part is arranged to be changeable by rotating the at least two moving screws supported by the support part.

21 . The jaw crusher according to claim 20 , wherein the jaw crusher further comprises a spring tightening device according to claim 12 .

22 . A processing plant of mineral material, comprising a jaw crusher according to claim 20 .

Assignees

• Metso Minerals Inc

Inventors

• Jokiranta Jukka
• Rikkonen Aleksi

Classifications

• B02C1/025 Primary

  Jaw clearance or overload control · CPC title

• B02C1/04 Primary

  with single-acting jaws · CPC title

• F16F1/121

  adjustable, e.g. to modify spring characteristics · CPC title

• F16F1/12

  Attachments or mountings {(F16F1/041, F16F13/02 take precedence; of combinations of vibration damper and mechanical spring for vehicle suspension units B60G15/02)} · CPC title

• B02C1/06

  with double-acting jaws · CPC title