JP2022148413A - Pulley detachment jig, shaft pull out device and shaft insertion device - Google Patents

Abstract

To provide a jig and a device capable of performing smoothly, detachment work of especially, a large diameter pulley from a shaft.SOLUTION: A pulley detachment jig 1 comprises: a base part 4; a first insertion part 5 which is provided on the base part 4 and on which an insertion hole 9 is formed for inserting a pull out member 8, the pull out member acting pull out force on a pulley 2 when pulling out the pulley 2 from the shaft 3; a second insertion part 6 which is provided on the base part 4 and in which an insertion hole 11 is formed for inserting an insertion member 10 which acts insertion force to the shaft 3 when inserting the shaft 3 into the pulley 2. There are also provided a shaft pull out device 13 and a shaft insertion device 22 using the same pulley detachment jig 1.SELECTED DRAWING: Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulley attaching/detaching jig, a shaft extracting device, and a shaft inserting device, which are used, for example, when attaching/detaching a shaft of a jaw crusher to/from a pulley.

Conventionally, a jaw crusher has been used as a primary crusher for crushing a large amount of very large lumps such as raw stones and asphalt. This jaw crusher has fixed teeth and movable teeth arranged in a V shape, and the movable teeth are eccentrically moved by an eccentric shaft having pulleys attached to both ends, thereby compressing the object to be processed between the teeth. pulverized.

Conventionally, jaw crusher maintenance has mainly consisted of repairing or replacing the liner on the tooth surface that has worn away due to crushing. Recently, however, there has been an increasing demand to continue using the jaw crusher for a longer period of time by replacing the eccentric shaft. In this case, the pulley is temporarily pulled out from the deteriorated eccentric shaft, and a new eccentric shaft is inserted into the pulley.

As a tool for pulling out the pulley from the shaft, for example, the tools shown in Patent Documents 1 to 3 below have been proposed.

In Patent Document 1, the claw 802 of the lower end 8b of the pulley extracting tool is hooked to the collar piece 2000 of the pulley 20, and the pulling force is applied to the claw 802 to pull out the pulley 20 (Paragraph 0046 of Patent Document 1, See Figure 2, etc.). Further, in Patent Document 2, a locking claw 20 of a tension arm 18 of a shaft mounting member extracting tool 10 is locked to the outer ring 3 of the bearing 1, and the tension arm 18 is moved by a link mechanism to attach the bearing 1 to the mounting shaft. 5 (see paragraphs 0026 to 0028 of Patent Document 2, FIG. 2, etc.). In addition, in Patent Document 3, a stripped bolt 22 is fixed by a pulley fixing nut 24 to holes 10 and 10' formed in a pulley 1, and each stripped bolt 22 is connected by a base plate 21, and the base plate A ram jack device 5 is interposed between 21 and the shaft 1S, and the ram 5A of the ram jack device 5 is extended to pull the pulley 1 toward the base plate 21 (Patent Document 3, paragraphs 0020 to 0029, See Figure 2, etc.).

Utility Model Registration No. 3160459 JP 2017-47485 A JP 2019-63922 A

In the configurations according to Patent Documents 1 and 2, the pulley (or bearing) is pulled out by pinching it with a tool from its outer diameter side, which is a method suitable for pulling out a relatively small pulley. For example, the pulley that supports the shaft of a large device such as the above-mentioned jaw crusher is very large (for example, 2.5 meters in diameter). It is difficult in reality.

In addition, in the configuration according to Patent Document 3, the cut bolt inserted through the hole formed in the pulley is fixed by the pulley fixing nut. A large hole (for example, 500 mm in diameter) is formed to reduce the weight, and the nut used in the hole must have a very large diameter (for example, an outer diameter of 600 mm). is difficult. In addition, while the configuration according to Patent Document 3 is suitable for pulling out the pulley, it is not suitable for inserting a new shaft, and there is the inconvenience of having to separately prepare a tool for the insertion work. be.

Accordingly, it is an object of the present invention to smoothly attach and detach a large-diameter pulley to and from a shaft.

In order to solve the above problems, in this invention,
a base;
a first insertion portion provided in the base portion and formed with a through-hole for inserting a pull-out member that exerts a pull-out force on the pulley when the pulley is pulled out from the shaft;
a second insertion portion provided in the base portion and formed with a through hole for inserting an insertion member for applying an insertion force to the shaft when the shaft is inserted into the pulley;
A pulley attaching/detaching jig having

This jig for attaching and detaching the pulley has a pull-out operation for pulling out the pulley from the shaft by inserting the pull-out member through the first insertion portion, and an insertion operation for inserting the pulley into the shaft by inserting the insertion member through the second insertion portion. Since it can be used for both operations, there is no need to prepare jigs for each operation, which facilitates preparation for the operation, and as a result, a series of attachment/detachment operations can be performed smoothly.

In the above configuration,
A pair of the second insertion portions are formed with the first insertion portion as the center of point symmetry, and the position of the through hole formed in the second insertion portion is the position of the fixing hole formed in the end of the shaft. It preferably corresponds to the position.

By doing so, in the operation of inserting the pulley into the shaft, an insertion force along the axial direction can be stably applied to the shaft, and the insertion operation can be performed smoothly.

In each of the above configurations,
It is preferable that the base portion can straddle a through hole for weight reduction formed through the pulley in the axial direction and a boss formed in the pulley for inserting the shaft. .

With this configuration, it is not necessary to install an auxiliary tool (such as a washer) to prevent the base portion (pulley attachment/detachment jig) from falling into the through hole or boss formed in the pulley. You can work smoothly.

Moreover, in this invention,
Any one of the jigs for attaching and detaching pulleys described above;
In a state of being inserted through a through hole formed in the first insertion portion of the pulley attachment/detachment jig and a through hole formed in the pulley for weight reduction, the pulley attachment/detachment jig attaches to the pulley by the pulley attachment/detachment jig. a fixed withdrawal member;
a connecting member that connects the drawing members fixed to the plurality of jigs for attaching and detaching the pulleys;
a jack interposed between the connecting member and the shaft inserted into the pulley, and applying a pulling force from the shaft to the pulley via the pulling member;
was constructed.

With this configuration, a pull-out force can be applied to the vicinity of the through hole formed in the pulley, and there is no need to pinch the pulley from the outer diameter side to pull it out. Moreover, a fixing member such as a nut of a general size can be used for fixing the pull-out member. Therefore, it is possible to smoothly pull out the large-diameter pulley.

Moreover, in this invention,
Any one of the jigs for attaching and detaching pulleys described above;
It is fixed to a fixing hole formed in the end of the shaft inserted into the pulley attaching/detaching jig and the pulley while being inserted through the through hole formed in the second insertion portion of the pulley attaching/detaching jig. an insert member that
a jack interposed between the jig for removing and removing the pulley and the pulley, and applying an insertion force to the shaft to the pulley via the insertion member;
A shaft insertion device having

In this way, the pulley attaching/detaching jig used in the pull-out operation can be used as it is for the shaft insertion operation, so that a series of pull-out/insertion operations can be performed smoothly.

In the present invention, by using a pulley attaching/detaching jig which is a member for attaching/detaching the pulley to/from the shaft, and which has through-holes for inserting the extracting member and the inserting member, it is possible to attach the pulley to the shaft of a large-diameter pulley. detachment work can be performed smoothly.

BRIEF DESCRIPTION OF THE DRAWINGS The front view which shows one Embodiment of the pulley attaching/detaching jig|tool which concerns on this invention. Cross-sectional view along the II-II line in FIG. BRIEF DESCRIPTION OF THE DRAWINGS Sectional drawing which shows one Embodiment of the shaft extraction apparatus which concerns on this invention. Front view of the shaft extraction device shown in FIG. FIG. 4 is a cross-sectional view showing a state in which the shaft is being pulled out by the shaft pulling-out device shown in FIG. 3 ; 1 is a cross-sectional view showing one embodiment of a shaft insertion device according to the present invention; FIG. 7 is a sectional view showing a state in which a shaft is inserted by the shaft inserting device shown in FIG. 6;

An embodiment of a pulley attaching/detaching jig 1 according to the present invention is shown in FIGS. 1 and 2. FIG. This pulley attachment/detachment jig 1 is particularly suitable for attachment/detachment of a large-diameter pulley 2 employed in a jaw crusher or the like to/from a shaft 3 . The pulley 2 has a boss 2a for inserting the shaft 3 at its center and a belt guide surface 2b at its outermost periphery. The boss 2a and the belt guide surface 2b are connected by a radially extending flange 2c. Through holes 2d for weight reduction are formed at predetermined intervals in the flange 2c so as to pass through the pulley 2 in the axial direction. Both ends of the shaft 3 are inserted into bosses 2 a of the pulley 2 .

The pulley attaching/detaching jig 1 has a base portion 4 , a first insertion portion 5 and a second insertion portion 6 .

The base portion 4 is a disk-shaped member having an outer diameter that can straddle the through hole 2d formed in the pulley 2 for weight reduction and the boss 2a into which the shaft 3 is inserted. On one surface of the base portion 4, reinforcing ribs 7 are erected vertically and horizontally two by two in parallel. The shape and presence/absence of the ribs 7 can be changed as appropriate.

The first insertion portion 5 is provided in the center of the base portion 4 . The first insertion portion 5 is formed with a through hole 9 for inserting a pull-out member 8 (for example, a cut bolt to be described later) that exerts a pull-out force on the pulley 2 when the pulley 2 is pulled out from the shaft 3. It is The inner diameter of the through-hole 9 is slightly larger than that of the pull-out member 8, so that the pull-out member 8 can be inserted smoothly.

The second insertion portion 6 is provided near the center of the base portion 4 so as to be adjacent to the first insertion portion 5 . A pair of the second insertion portions 6 are formed with the first insertion portion 5 as the center of point symmetry. Each second insertion portion 6 has a through hole 11 for inserting an insertion member 10 (for example, a cut bolt described later) that applies an insertion force to the shaft 3 when the shaft 3 is inserted into the pulley 2. formed. The inner diameter of this through hole 11 is slightly larger than that of the insertion member 10, so that the insertion member 10 can be smoothly inserted. The position of the through hole 11 formed in each second insertion portion 6 corresponds to the position of the fixing hole 12 formed in the end of the shaft 3 . Therefore, the through holes 11 can be appropriately changed according to the positions and the number of the fixing holes 12 .

A shaft extractor 13 according to the invention is shown in FIGS. 3-5. This shaft extracting device 13 is a device used when extracting the shaft 3 from the pulley 2, and has the pulley removing jig 1 described above, the extracting member 8, the connecting member 14, and the jack 15. ing.

The extraction member 8 is a stripped bolt. One end of the pulling member 8 is inserted through a through hole 9 formed in the first insertion portion 5 of the pulley attaching/detaching jig 1 and through a through hole 2d formed in the pulley 2 for weight reduction. The pulley 2 is sandwiched from both sides in the axial direction by the pulley attaching/detaching jig 1 and a circular washer 16 and a rectangular washer 17 having a larger diameter than the through hole 2d formed in the pulley 2, and nuts 18 are attached from both sides thereof. It is tightened and fixed to the pulley attaching/detaching jig 1 and the pulling member 8 . This nut 18 only needs to correspond to the diameter of the pull-out member 8 (slotted bolt), and a general-purpose nut 18 can be used, which is highly convenient. Although the jig 1 for attaching and detaching the pulley can be provided on any surface of the flange 2c of the pulley 2, it is preferably provided on the surface opposite to the surface facing the connecting member 14. As shown in FIG.

The connecting member 14 is a member that connects the pulley 2 and the drawing members 8 fixed to the plurality of pulley attaching/detaching jigs 1 . The connecting member 14 has a square tube shape with a rectangular cross section, and the other end sides of the pull-out members 8 are inserted through opposite sides of the rectangular cross section. A reinforcing member 19 is provided in the central portion of the rectangle. The other end of the pulling member 8 inserted through the connecting member 14 is fixed to the connecting member 14 with a nut 21 via a square washer 20 . As a result, the pulley 2, the pulley attaching/detaching jig 1, the drawing member 8, and the connecting member 14 are positioned in a predetermined positional relationship.

The jack 15 is a member that is interposed between the central portion of the connecting member 14 and the shaft 3 inserted into the pulley 2, and applies a pulling force from the shaft 3 to the pulley 2 via the pulling member 8. . When the jack 15 is extended, the pulley 2 is withdrawn from the shaft 3 as shown in FIG.

A shaft insertion device 22 according to the invention is shown in FIGS. This shaft insertion device 22 is a device used when inserting the shaft 3 into the pulley 2, and has the pulley removal jig 1, the insertion member 10, and the jack 23 described above.

The insert member 10 is a strip bolt. The insertion member 10 is inserted into the through hole 11 formed in the second insertion portion 6 of the jig 1 for attaching and detaching the pulley, and one end of the insertion member 10 is placed in the boss 2 a of the pulley 2 . are screwed into a pair of fixing holes 12 (tapped holes) formed in the . The other end side of the insertion member 10 is fixed to the second insertion portion 6 of the pulley attachment/detachment jig 1 with a nut 24 . As a result, the shaft 3, the pulley attachment/detachment jig 1, and the insertion member 10 are positioned in a predetermined positional relationship. Although two insertion members 10 are used in this embodiment, the number of insertion members 10 can be changed as appropriate according to the number of fixing holes 12 formed in the shaft 3 .

The jack 23 is a member that is interposed between the base portion 4 of the pulley attaching/detaching jig 1 and the pulley 2 and applies an insertion force to the pulley 2 to the shaft 3 via the insertion member 10 . In this embodiment, two jacks 23 are provided, but the number can be changed as appropriate. When the jack 23 is extended, the shaft 3 is inserted into the pulley 2 as shown in FIG.

The embodiments disclosed this time are illustrative in all respects and should be considered not restrictive. Therefore, the scope of the present invention is indicated by the scope of the claims rather than the above description, and is intended to include meanings equivalent to the scope of the claims and all modifications.

1 Pulley attaching/detaching jig 2 Pulley 2a Boss 2b Belt guide surface 2c Flange 2d Through hole 3 Shaft 4 Base portion 5 First insertion portion 6 Second insertion portion 7 Rib 8 Withdrawal member 9, 11 Through hole 10 Insert member 12 Fixing hole 13 shaft extracting device 14 connecting members 15, 23 jack 16 circular washers 17, 20 square washers 18, 21, 24 nut 19 reinforcing member 22 shaft inserting device

Claims (5)

a base portion (4);
A through-hole (9) for inserting a pull-out member (8) which is provided in the base portion (4) and applies a pull-out force to the pulley (2) when the pulley (2) is pulled out from the shaft (3). A first insertion portion (5) formed with
A through hole provided in the base portion (4) for inserting an insertion member (10) for applying an insertion force to the shaft (3) when the shaft (3) is inserted into the pulley (2). a second insertion portion (6) in which (11) is formed;
A jig for removing and removing a pulley. A pair of the second insertion portions (6) are formed with the first insertion portion (5) as the center of point symmetry, and the position of the through hole (11) formed in the second insertion portion (6) is 2. A pulley attaching/detaching jig according to claim 1, corresponding to the position of a fixing hole (12) formed in the end of said shaft (3). The base portion (4) has a through hole (2d) formed through the pulley (2) in the axial direction for weight reduction, and the shaft (3) formed in the pulley (2). 3. The pulley attaching/detaching jig according to claim 1 or 2, which can straddle the bosses (2a) into which the pulleys are inserted. A pulley attachment/detachment jig (1) according to any one of claims 1 to 3;
It is inserted through a through hole (9) formed in the first insertion portion (5) of the pulley attaching/detaching jig (1) and a through hole (2d) formed in the pulley (2) for weight reduction. a pull-out member (8) fixed to the pulley (2) by the pulley attaching/detaching jig (1) in the state of being attached;
a connecting member (14) that connects the drawing members (8) fixed to the plurality of jigs (1) for removing and removing the pulleys;
It is interposed between the connecting member (14) and the shaft (3) inserted into the pulley (2), and the pulley (2) is interposed between the shaft (3) and the pulley (2) via the withdrawal member (8). A jack (15) that exerts a pulling force from
A shaft extractor having a. A pulley attachment/detachment jig (1) according to any one of claims 1 to 3;
Inserted into the pulley attaching/detaching jig (1) and the pulley (2) while being inserted through the through hole (11) formed in the second insertion portion (6) of the pulley attaching/detaching jig (1). an insertion member (10) fixed in a fixing hole (12) formed in the end of the shaft (3) to be mounted;
It is interposed between the pulley attaching/detaching jig (1) and the pulley (2), and applies the insertion force to the pulley (2) to the shaft (3) via the insertion member (10). an actuation jack (23);
A shaft insertion device having a.

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