JPH04105213U - Bolt/nut loosening device - Google Patents

Abstract

(57) [Summary] [Structure] Heads 1 of a pair of polygonal bolts for attaching a universal joint 70 are collectively prevented from loosening by a plate 2. A central portion of the plate 2 is fixed to the housing 74 with a mounting bolt 4. Both ends of the plate 2 have a pair of arcuate surfaces 22a facing the side surfaces 1b of the head 1. Each arcuate surface 22a is formed by the head 1
It is concentric with the center of rotation of A stopper pin 5 is fitted into the gap between the side surface 1b and the arcuate surface 22a, and the stopper pin 5 is welded to the plate 2. [Effect] Even bolts used in the drive path of the rolling rolls under conditions where they are likely to loosen can be reliably prevented from loosening.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea was developed to install a universal joint in the rolling roll drive system. A bolt/nut loosening device that collectively restricts the rotation of a pair of bolts and nuts. Regarding equipment.

0002

[Conventional technology]

A universal joint is inserted in the drive path of the rolling roll, and usually , in this universal joint, as shown in Figure 5, the end of the cross shaft is The supported housing 84 is attached to the flange on the rolling roll side by a pair of hexagonal bolts 80. It is attached to a lunge yoke 85 or a flange yoke 86 on the driving device side.

0003 The hexagonal bolts mentioned above tend to loosen under conditions of high rotation and high vibration, so , a locking device as shown in FIG. 4 was provided. In other words, the head of the hexagonal bolt 80 A hole 82 passing through the portion 81 in the radial direction is provided, and both bolts 80, 80 is crossed with a wire 83, and this wire 83 is used to prevent loosening. It was.

0004

[Problem that the idea aims to solve]

However, in the bolt/nut loosening device described above, the wire 83 is The wire 83 often loosens or breaks due to the elongation that occurs. , the anti-loosening effect was inferior. The purpose of this invention is to solve the above technical problems and to provide bolts that can reliably prevent loosening. The purpose of the present invention is to provide a locking device for nuts.

[0005]

[Means to solve the problem]

In order to achieve the above objective, this invention has developed a unit that is interposed in the drive path of the rolling rolls. Designed for mounting versatile joints on the rolling roll side or drive side A pair of objects, such as the heads of polygonal bolts and nuts, are placed apart from each other. A locking device for bolts and nuts that collectively restricts rotation relative to the fastened part. At the location, at both ends, each facing at least one side of each object, and A plate with arcuate surfaces concentric with the center of rotation, and each arcuate surface and the opposite pair. A stock that is inserted into the gap with the side of the object to close the gap and is welded to the plate. A mounting bolt that fixes the central part of the plate to the part to be fastened is provided. It is characterized by:

[0006]

[Effect]

According to the above configuration, the plate is attached to the fastened part by the mounting bolt. In the gap between the arc surface at both ends of and the side of the object opposite to this arc surface, After fitting the stopper pins, weld each stopper pin to the plate and fix it. Accordingly, the rotation of each object relative to the object to be fastened can be reliably restricted.

[0007] In addition, since the central part of the plate is fixed to the part to be fastened with the mounting bolt, , there is also certainty in the fixed position of the plate itself.

[0008]

【Example】

Embodiments will be described in detail below with reference to the accompanying drawings showing embodiments. FIG. 3 shows the hexagonal joint 70 to which the locking device A is attached. A head 1 as an object consisting of a bolt and its surrounding parts are shown. This Yu The universal joint 70 is used to connect the pressure edge roll side 72 and the drive device side 73. I'm tired. The above hexagonal bolts are attached to each of the cross axes of the universal joint 70. The housing 74 as a fastened part that supports the shaft part is connected to the flange on the pressure edge roll side 72. Attached to the flange yoke 72a or the flange yoke 73a on the drive device side 73. ing. The top surface of the head 1 of the hexagon bolt and the end surfaces 72 of the flange yokes 72a and 73a b, 73b is narrowed.

[0009] Referring to FIG. 1 and FIG. 2 showing the II-II cross section of FIG. 1, this locking device A is , a plate 2 attached to the housing 74 by a pair of mounting bolts 4; A stopper that comes into contact with the side surface 1b of each head 1 as an object to restrict rotation of the head 1 It has a pin 5. The housing 74 can support the central part of the plate 2. It has a curved flat surface 74a. In FIG. 2, 77 supports the cross shaft This is a fitting hole into which a bearing is fitted.

0010 The head 1 has a circular flange portion 1a that serves as a seating surface for the plate 2. P Rate 2 is made of a so-called box wrench-shaped plate material that is thinner than the thickness of head 1. , has a pair of through holes 21 in the center for passing a pair of mounting bolts 4, and has a pair of through holes 21 at both ends. The head through-holes 22 are provided in the portions thereof, through which the pair of heads 1 are respectively passed. a pair of The through holes 21 are arranged along the longitudinal direction of the plate 2. Head through hole 22 is a round hole concentric with the center of rotation of the head 1, and its inner peripheral wall is connected to each side 1b of the head 1. The arcuate surface 22a is opposite to the arcuate surface 22a. As mentioned above, the head through hole 22 and the head 1 The reason why the two are concentric is that the head 1 is in the same direction when the hex bolt is tightened. The shape of the gap between the side surface 1b of the head 1 and the arcuate surface 22a does not change even if This is to allow the use of a single specification stopper pin 5. Ru.

[0011] Each stopper pin 5 has a gap between the side surface 1b of the head 1 and the arcuate surface 22a of the plate 2. It is made of a plate material with a crescent-shaped cross section that closes the arcuate surface 22a, and is welded to the arcuate surface 22a. . The mounting bolt 4 is inserted between its head 41 and the plate 2. into the screw hole 31 of the housing 74 with its own locking plate 6 interposed. It's screwed in. The locking plate 6 is attached to the mounting bolt by bending its corner 61. The mounting bolt 4 is placed in close contact with the side surface of the bolt 4 to restrict rotation of the mounting bolt 4.

0012 According to this embodiment, first, the plate 2 is placed on the top surface of the head 1. Attach it to the housing 74 with the mounting bolt 4 so that it does not protrude from the housing 74. Then, the head 1 is passed through the head through hole 22, and the arcuate surface 22a of the plate 2 is inserted into the head 1. to face the side surface 1b of. Then, between this arcuate surface 22a and the head 1 facing it, After fitting the stopper pin 5 into the gap with the side surface 1b to close the gap, the stopper pin 5 is inserted into the gap with the side surface 1b. By welding and fixing the pin 5 to the plate 2, it is attached to the housing 74 of the head 1. It is possible to reliably restrict the rotation relative to the

[0013] In addition, the central part of the plate 2 is fixed with a mounting bolt 4, and this Since the moment of inertia of the plate 2 around the mounting bolt 4 is reduced, Reduces the inertia force around the 4 mounting bolts that acts on plate 2 under high rotation and high vibration conditions. It is also possible to securely fix the plate 2 itself. Moreover, the mounting bolt 4 is also prevented from loosening by the locking plate 6, so this installation There is no possibility that the plate 2 will come off due to the loosening of the bolt 4, and the This layer can reliably control the loosening of bolts as objects. Therefore, rolling Bolts for universal joints in roll drive systems are used in conditions where they are likely to loosen. Suitable for preventing loosening of objects that are Furthermore, the stopper pin 5 that restricts the rotation of the head 1 is pushed out from the top surface 1a of the head 1. Since it is welded to the plate 2 that does not come out, the strip around the head 1 is Even if the space is narrow, secure a wide space for welding work within the space. This makes it possible to facilitate the installation of the locking device. and the head Since the top surface of 1 is exposed, it is easy to measure the axial force using ultrasonic waves. Wear.

[0014] In addition, since there is no need to perform processing such as drilling on the head 1, the equipment cost is reduced. It is possible to reduce the cost of strikes. Moreover, parts other than the stopper pin 5 cannot be used repeatedly even if they are removed once. It is also advantageous in terms of cost. Note that this invention is not limited to the above embodiments, and for example, plate 2 may be a double-ended spanner type. Further, the arcuate surface 22a is formed at least in the head 1. It is sufficient that the stopper pin 5 faces one side surface 1b, and the stopper pin 5 is It is sufficient if it comes into contact with at least one side surface 1b.

[0015] Also, as the seat of the plate 2, a separate body from the head 1 can be used instead of the flange 1a. Spacers can be used. Furthermore, this invention can be applied to prevent loosening of a pair of nuts installed together. The main points of this invention, such as its application to prevent loosening of bolt heads and nuts, are explained below. Various design changes can be made without changing the design.

[0016]

[Effect of the idea]

As described above, according to the bolt/nut loosening device configured as described above, the fastened part The arc surface of the plate attached by the mounting bolt to the After inserting each stopper pin into the gap between the side surface of the object and the By welding and fixing the pin to the plate, each object can be rotated relative to the object to be fastened. can be reliably regulated and ensured to prevent loosening. Also, the center of the plate Since the part is fixed to the part to be fastened by the mounting bolt, it is fixed to the plate itself. There is also reliability and therefore a universal joint in the rolling roll drive system It is said to be suitable for preventing loosening of objects used in conditions where they are likely to loosen, such as bolts for It has a unique effect.

[Brief explanation of drawings]

FIG. 1 is a front view showing a bolt/nut loosening device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG. 1;

FIG. 3 is a schematic diagram of the vicinity of a universal joint to which a bolt/nut loosening device is attached.

FIG. 4 is a front view of a conventional locking device.

[Figure 5] Unibar with conventional locking device installed
It is a schematic diagram of the vicinity of the monkey joint.

[Explanation of symbols]

1 Head (object) 1b Side 2 plate 4 Mounting bolt 5 Stopper 22a Arc surface 74 Housing (part to be fastened)

Claims (1)

[Scope of utility model registration request] Claim 1: A pair of objects consisting of heads of polygonal bolts, nuts, etc., arranged at a predetermined distance apart in order to attach a universal joint in the drive path of the roll to the roll or drive device. In a bolt/nut loosening device that collectively restricts the rotation of bolts and nuts with respect to the fastened parts, the bolts and nuts are provided at both ends facing at least one side of each object and that prevent the rotation of the object. A plate forming an arcuate surface concentric with the center, a stopper pin that is fitted into the gap between each arcuate surface and the side surface of the object facing the object, and is welded to the plate, and a stopper pin that is welded to the plate and a center portion of the plate. A bolt/nut loosening device characterized by comprising a mounting bolt fixed to a fastened part.