CN214465541U

CN214465541U - Main shaft locking structure and roller cage shoe

Info

Publication number: CN214465541U
Application number: CN202120556441.5U
Authority: CN
Inventors: 张保臣; 胡刘扣; 韩壮
Original assignee: Jiangsu Wolifei Electronic Technology Co ltd
Current assignee: Jiangsu Wolifei Electronic Technology Co ltd
Priority date: 2021-03-18
Filing date: 2021-03-18
Publication date: 2021-10-22
Anticipated expiration: 2031-03-18

Abstract

The utility model discloses a main shaft locking structure and a roller cage shoe, wherein the main shaft locking structure is used for locking a main shaft on the roller cage shoe on a swing frame, wherein, a shaft section of the main shaft for assembling with the swing frame is provided with a thread head, the thread head is locked for a locking nut after passing from one side to the other side of the swing frame through a main shaft hole arranged on the swing frame, and one end of the locking nut, which is jointed with the swing frame, is provided with a flange; correspondingly, a fixing hole is formed in the position where the swing frame is aligned with the flange; fasteners are provided to lock the flanges through the fixing holes. Based on the utility model discloses easily lock the main shaft fast, and have better locking effect.

Description

Main shaft locking structure and roller cage shoe

Technical Field

The utility model relates to a locking structure that is used for the main shaft of gyro wheel cage shoe to lock on the rocker, the utility model discloses still relate to a gyro wheel cage shoe that is furnished with this locking structure.

Background

The roller cage shoe is generally mounted on a cage and is matched with a cage guide arranged in the cage to guide the cage in the cage, and the conventional structure of the roller cage shoe can be seen in pages 1 to 4 of a coal industry standard MT236-2011 (the standard name is a 'rectangular steel cage shoe') and is also referred to the roller cage shoe shown in the attached

drawings

1 and 2 of the specification, wherein the roller cage shoe shown in the attached drawings has the general structure of the roller cage shoe, and specifically comprises a bottom frame 1, and a plurality of screw holes are formed in the bottom frame 1 and are used for assembling the roller cage shoe on the cage, for example. The swing frame 5 shown in fig. 1, also called swing arm, includes two arms at an angle of about ninety degrees from each other, and a main shaft hole is formed at the bend of the arm, by which a main shaft 7 is fixedly installed on the swing frame 5, where the fixation requires that a main shaft locking structure can reliably lock the main shaft 7 on the swing frame 5, one end of the swing frame 5 is installed on the chassis 1 through a hinge shaft 4, the other end is connected with one end of a buffer 3 through a hinge shaft 6, the other end of the buffer 3 is connected on the chassis 1 through a hinge shaft 2, during the use, a roller 8 installed on the main shaft 7 runs on a cage guide, the running is not stable, the main shaft 7 and the locking structure thereof are affected by alternating loads, and if the locking structure is not well locked, the locking structure is easy to be loosened, the loosening is proportional to the magnitude of the loads, thereby finally causing the main shaft 7 to fall off.

The shaft section of the spindle 7 connected to the rocker 5 has a shoulder or collar at one end to axially position the spindle 7 and a thread at the other end, which can be locked by a lock nut (typically a round nut), and in order to ensure the locking reliability, a stop washer is usually assigned to the lock nut or a double nut is used for tightening. The structure of double nuts tightening occupies a larger length of the main shaft 7, and is easy to generate movement interference. The stop washer belongs to a vulnerable part, and the fastening reliability is relatively poor.

In the "improved roller cage shoe" disclosed in chinese patent document CN201043109Y, in order to lock the main shaft 7, a main shaft hole is opened on its support (i.e. the swing frame), one end of the shaft (i.e. the main shaft) has a section matching with the main shaft hole, one end of the section has a shaft shoulder, the other end has a section of screw thread, matching with the screw thread, a round nut and a lock washer are provided, and at the same time, as an additional locking structure, a first elongated fastener is provided on the side of the main shaft, and the first elongated fastener should be a set screw (commonly called a jackscrew). The drawbacks of the locking structure with round nut cooperating with stop washer have been mentioned above, while the set screw for the secondary locking, which is used only for the secondary locking and not the primary locking structure, has not much guiding value for the improvement of the spindle locking structure.

Disclosure of Invention

An object of the utility model is to provide an easily lock the main shaft fast, and have the main shaft locking structure of better locking effect, the utility model discloses still relate to a gyro wheel cage shoe that is furnished with this main shaft locking structure.

In an embodiment of the utility model, a spindle locking structure is provided for the locking of the spindle on the roller cage shoe on the swing frame, wherein, the spindle is used for the spindle section assembled with the swing frame to have a screw head, the screw head passes from one side of the swing frame to the other side via a spindle hole arranged on the swing frame and then locks a locking nut, and one end of the locking nut jointed with the swing frame is provided with a flange;

correspondingly, a fixing hole is formed in the position where the swing frame is aligned with the flange;

fasteners are provided to lock the flanges through the fixing holes.

Optionally, the mounting holes of the flange are divided into two groups, and the two groups of mounting holes are symmetrical with respect to the axis of the flange;

accordingly, there are an even number of fixation holes, evenly arrayed around the spindle hole.

Optionally, there are four fixing holes, wherein selected two of the holes are used for fixing the flange, and the selected two are symmetrical about the axis of the spindle hole;

correspondingly, one selected mounting hole in each of the two groups of mounting holes is aligned and assembled with the corresponding fixing hole.

Optionally, each group of mounting holes has three mounting holes, and an included angle between adjacent connecting center lines is 30 degrees based on the connecting center line of the mounting hole and the flange.

Optionally, the mounting hole is a smooth hole, and the fixing hole is a threaded hole;

accordingly, the fastener is a screw.

Optionally, the main body of the lock nut is a threaded sleeve, and the outer cylindrical surface of the threaded sleeve is a regular hexagonal cylindrical surface.

Optionally, a fastening screw hole is formed in the side surface of the locking nut;

accordingly, a set screw is provided to lock the lock nut from the side.

Optionally, a nut for providing pre-tightening force is arranged on the set screw.

Optionally, the back side of the nut is also provided with a backup nut.

The embodiment of the utility model provides an in, still provide a gyro wheel cage shoe, the main shaft of this gyro wheel cage shoe adopts as before the assembly of main shaft locking structure on the rocker of this gyro wheel cage shoe.

In the embodiment of the invention, the locking nut adopted by the locking structure is provided with a flange, the flange is positioned at one end of the locking nut, which is jointed with the swing frame, correspondingly, a fixing hole is formed in the swing frame, and the swing frame is connected with the locking nut through the fixing hole by the flange through a fastening piece. Flange joint belongs to the reliability ratio among the mechanical field and is better, and assembles very convenient connected mode to because flange joint does not lead to the load between lock nut and the main shaft to change, the screw thread pair that corresponds is difficult to damage, and has longer life.

Drawings

Fig. 1 is a schematic front view of a roller cage shoe according to an embodiment.

Fig. 2 is a schematic side view of the structure of fig. 1.

FIG. 3 is a schematic view of the spindle lock structure on the upper end of the roller cage shoe according to an embodiment.

FIG. 4 is a side sectional view of the spindle lock according to an embodiment.

Fig. 5 is a schematic view of an embodiment of a swing frame.

Fig. 6 is a front view of the lock nut in one embodiment.

Fig. 7 is a left side sectional view of the lock nut in one embodiment.

In the figure: 1. the device comprises a base frame, 2 hinge shafts, 3 buffers, 4 hinge shafts, 5 swing frames, 6 hinge shafts, 7 main shafts, 8 rollers, 9 set screws, 10 second locking nuts, 11 unthreaded holes, 12 first locking nuts, 13 screws, 15 threaded holes, 16 flanges and 17 threaded sleeves.

Detailed Description

It is first of all noted that the locking of the spindle 7 is normally carried out by means of a locking nut, such as the first locking nut 12 shown in fig. 4, and that, correspondingly, the spindle 7 has a thread at the end opposite to the end on which the roller 8 is mounted, hereinafter referred to as the head.

The lock nut shown in fig. 6 and 7 has two main parts, the part located at the left end in fig. 7 is a flange 16, and the other part is a threaded sleeve 17, and accordingly, in the structure shown in fig. 1 to 4, the first lock nut 12 is first used as a locking member for locking the spindle 7, and then constitutes a locked member, and the first lock nut 12 is locked using, for example, the screw 13, without increasing the locking force between the first lock nut 12 and the screw head, for example, the screw 13, so that the burden of the thread pair between the first lock nut 12 and the screw head can be reduced, and the service life can be extended.

The spindle locking structure is used for locking the spindle 7 on the roller cage on the swing frame 5, wherein the spindle 7 is a multi-segment structure, the extending end of the spindle 7 is provided with a journal for mounting the roller 8 by using a bearing, and the shaft segment of the spindle 7 for assembling with the swing frame 5 is provided with a threaded head, correspondingly, the threaded head passes through a spindle hole 14 arranged on the swing frame 5 from one side to the other side of the swing frame 5 to lock a locking nut, such as a first locking nut 12 shown in fig. 3. Due to the fact that the spindle 7 is in the cantilevered state, the spindle opening 14 should be provided with a relatively high resistance against torsional shearing, in combination with a corresponding, for example, first locking nut 12.

In contrast, it is conventional practice to increase the pretension of, for example, the first locking nut 12, which method is prone to damage to the thread, i.e. the so-called slip thread, which can lead to, for example, scrapping of the spindle 7 or the first locking nut 12.

For example, the first lock nut 12 is locked by a rotation stop, and the principle is the same whether the nut is used for tightening or the rotation stop is used for stopping rotation by a rotation stop washer, in the embodiment of the present invention, the first lock nut 12 is still locked by a rotation stop.

Correspondingly, the lock nut shown in fig. 6 and 7 is provided with a flange 16 at one end, which is the end that engages the pendulum frame 5. It should be noted that the flange 16 is provided with assembly holes, which are common knowledge in the field of machinery and will not be described in detail here.

Correspondingly, as shown in fig. 5, the position of the swing frame 5 aligned with the flange 16 is provided with a threaded hole 15, such as shown in fig. 5, for fixing the flange 16, which is referred to as a fixing hole. The fixing holes may be threaded holes 15 or unthreaded holes, and if unthreaded holes are used, the flange 16 needs to be fixed using, for example, rivets or bolts, and if threaded holes are used, the fixing can be achieved using screws 13.

In addition, the swing frame 5 is often made of a composite of steel plates, and as can be seen from fig. 2, in the axial direction of the main shaft 7, the swing frame 5 is formed by welding and assembling two left and right steel plates, which are provided with, for example, unthreaded holes, and have enough space for operating bolts.

When the first lock nut 12 is assembled with the main shaft 7 to lock the main shaft 7 on the swing frame 5, the pre-tightening force applied by the first lock nut 12 can be relatively small, and then the first lock nut 12 is locked on the swing frame 5 through the flange 16.

As a further consideration of the inventors, the forces to which the fastening structure of the flange 16 should be relatively uniform, the resultant force of the fastening structure should fall as far as possible on the axis of, for example, the threaded sleeve 17; correspondingly, the mounting holes of the flange 16, such as the light holes 11 shown in fig. 6, are divided into two groups, and it can be seen that the two groups of light holes 11 are symmetrical with respect to the axis of the flange 16.

Accordingly, in fig. 5, there is an even number of threaded holes 15, evenly arrayed around the spindle hole 14.

The threaded holes 15 are even in number, and only two threaded holes are needed for fixing the flange 16.

Further, four fixing holes are provided, and two of the four fixing holes are selected for fixing the flange, the two selected holes are symmetrical about the axis of the spindle hole 14, the fixing mode meets the basic fixing of the flange 16, and the fixing only needs to have requirements on the reliability of the fixing and has lower requirements on the strength of the fixing.

In the structure shown in fig. 6, each group of mounting holes has three mounting holes, and the connecting line between the mounting holes and the flange 16 is taken as a reference, and the included angle between adjacent connecting lines is 30 degrees, so that when the pretightening force of the first locking nut 12 needs to be adjusted, each 30 degrees is an adjusting unit, and the adjustment is relatively convenient.

In the structure shown in fig. 6 and 7, the main body of the first lock nut 12 is a threaded sleeve 17, and the outer cylindrical surface of the threaded sleeve 17 is a hexagonal cylindrical surface, so that a wrench can be conveniently used for locking the first lock nut 12.

In the structure shown in fig. 3 and 4, a fastening screw hole is formed on the side surface of the first lock nut 12, specifically, the threaded sleeve 17;

accordingly, a set screw 9 is provided to lock the first lock nut 12 from the side, thereby assisting in locking the first lock nut 12.

Furthermore, a nut providing pre-tightening force, such as a second lock nut 10 shown in fig. 3, is disposed on the set screw 9.

Further, the back side of the second lock nut 12 is also provided with a backup nut.

Claims

1. A main shaft locking structure is used for locking a main shaft on a roller cage shoe on a swing frame, wherein a shaft section of the main shaft for being assembled with the swing frame is provided with a threaded head, and the threaded head passes through a main shaft hole arranged on the swing frame from one side to the other side of the swing frame and then locks a locking nut;

fasteners are provided to lock the flanges through the fixing holes.

2. The spindle locking structure according to claim 1, wherein the mounting holes provided in the flange are divided into two groups, and the two groups of mounting holes are symmetrical with respect to the axis of the flange;

3. The spindle locking arrangement of claim 2, wherein there are four of the securing holes, and wherein selected two of the securing holes are for securing the flange, the selected two being symmetrical about the axis of the spindle hole;

4. The spindle locking structure according to claim 2 or 3, wherein each set of the mounting holes has three mounting holes, and an angle between adjacent connecting lines is 30 degrees with respect to the connecting line between the mounting hole and the flange.

5. The spindle locking structure according to claim 2 or 3, wherein the mounting hole is a smooth hole, and the fixing hole is a threaded hole;

accordingly, the fastener is a screw.

6. The spindle locking structure according to claim 1, wherein the body of the lock nut is a threaded sleeve, and an outer cylindrical surface of the threaded sleeve is a regular hexagonal cylindrical surface.

7. The spindle locking structure according to claim 1 or 6, wherein a fastening screw hole is formed at a side surface of the lock nut;

accordingly, a set screw is provided to lock the lock nut from the side.

8. The spindle locking arrangement of claim 7, wherein the set screw has a nut that provides a pre-load force.

9. The spindle lock of claim 8, wherein the back side of the nut is provided with a backup nut.

10. A roller cage shoe, characterized in that the main shaft of the roller cage shoe is assembled on the swing frame of the roller cage shoe by using the main shaft locking structure according to any one of claims 1 to 9.