JPH08128453A - Coupling device - Google Patents

Abstract

PURPOSE: To provide a coupling device which can perform the automatic separation and joining of both the shafts, facilitate the manufacture of the coupling and generates the sure engagement state. CONSTITUTION: A coupling device has the male and female splines for connecting two shafts on the same axis line. A cylindrical member 1 having a female spline 2 formed is connected on one shaft side, and a plunger 4 whose top end can be projected from the inner surface side is internally installed in the radial direction on the cylindrical member 1, and regulates the phase angle for the female spline 2, and a male spline 5 is formed on the other shaft side, and when the male spline 5 is inserted inside the cylindrical member 3, the top end of the plunger 4 is projected to the bottom of the male spline 5, and the phase angle for the female spline 2 is allowed to accord.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coupling device which is optimally applied to, for example, a molding stand shaft in an exchange base system.

[0002]

2. Description of the Related Art Conventionally, various roll stands have been used in, for example, an electric resistance welded steel pipe production line, but it is necessary to replace these rolls when changing the pipe manufacturing dimensions of the electric resistance welded steel pipe. Becomes Regarding this roll replacement, there are a method of replacing only the roll and a method of replacing each of the stands. However, since the method of replacing only the roll requires a lot of labor and time, a replacement base method of replacing each of the stands is often adopted. Has been done.

However, when the stand is exchanged, the coupling connecting the roll shaft and the drive shaft for transmitting the driving force is removed, and the roll shaft and the drive shaft of the newly carried-in stand are removed. Need to be reconnected by coupling.

However, it is not easy to manually insert and remove the coupling every time the stand is replaced to perform the connecting operation, which causes a problem that the pipe forming work is interrupted for a long time.

Therefore, there has been proposed a coupling device (Japanese Patent Publication No. 61-47614) in which coupling and separation of the roll shaft and the drive shaft can be automatically performed without human intervention.

According to the technique described in the above publication, a male spline is formed at one end of a roll shaft supported by a bearing box of a drive shaft stand, and a coupling of a universal joint supported by a bearing box provided on a bed. A female spline is formed on at least one of the spline teeth to be longer than the other teeth, and the engagement of the long spline teeth with each other facilitates the engagement of the other spline teeth. It is a thing. However, in this way, the other short teeth must be manually shaved and formed, which is extremely laborious to make.

To solve this problem, the applicant previously proposed the technique disclosed in Japanese Patent Publication No. 3-38449.

In this technique, as shown in FIG. 4, spline shafts c and d are provided on opposite ends of a roll shaft a and a drive shaft b so as to face each other on the same line. A cylindrical fixed coupling e is externally fitted and its base portion f is fixed to the root portion of the spline shaft c with a set screw (not shown), while the spline shaft c is provided with a spline on the inner circumference of the movable tooth member g. h is fitted and slidable in the axial direction.

This movable tooth member g has a tooth i disposed on the outer end surface thereof in an annular shape coaxially with the roll shaft side spline shaft c, and the advancing position of this tooth i is determined by the positioning means j with respect to the spline shaft c. The fixed coupling e is limited to a position slightly retracted from the tip, and a spring k for advancing the movable tooth member g is provided in the fixed coupling e.

On the drive shaft side spline shaft d, a movable coupling n supported by a bearing m on an auxiliary stand 1 is fitted on a spline o on the inner periphery of the spline shaft d so as to be slidable in the axial direction. A fixed tooth p is provided on the outer peripheral surface of the ring n so as to face and mesh with the tooth i of the movable tooth member g, and the tip of the fixed tooth p is the outer end surface of the drive shaft spline shaft d. They are located almost in the same plane.

As the movable coupling n is moved to the left side of the drawing, the movable tooth member g is pushed into the fixed coupling e against the spring k, and the spline o on the inner circumference of the movable coupling n is in the meantime. The rotation of the side spline shaft d is transmitted to the roll shaft a via the movable coupling n, and is coupled so as to transmit a large rotational torque. Note that FIG. 4 shows a cross section of a state in which the tooth i of the movable tooth member g on the fixed coupling e side and the fixed tooth p on the movable coupling n side are brought into meshing contact with each other by the movement of the auxiliary stand 1.

[0012]

However, although the one disclosed in the above publication has the advantage that the coupling is easy and reliable, it has a large number of constituent parts, the structure is complicated, and a large rotational torque is required. However, there is a problem in that it is too expensive because it can be transmitted.

In view of this, the present invention improves the above-mentioned prior art in order to solve the problems of the above-mentioned prior art, so that both shafts can be automatically separated and coupled, and the coupling can be manufactured easily. Moreover, it is an object of the present invention to provide a coupling device that can obtain a reliable engaged state.

[0014]

In order to achieve the above object, the present invention provides a coupling device having male and female splines for connecting two shafts on the same axis, wherein a female spline is formed on one shaft side. The cylindrical member is connected, and the end portion of the cylindrical member is provided with a plunger whose tip can protrude from the inner surface side in the radial direction to regulate the phase angle with the female spline and to connect the male spline to the other shaft side. And when the male spline is inserted into the inside of the tubular member, the tip of the plunger is projected and positioned in the valley of the male spline, and the phase angle with the female spline is matched. And

[0015]

According to the above construction, by setting the relationship between the phase of the female spline provided on the tubular member and the plunger in advance, when the male spline is inserted into the tubular member, the plunger is located on the valley side of the male spline. The angles at the time of projecting and engaging with the female spline become the same, and the connection can be easily performed by sliding in the state as it is, and unnecessary rotational force is not transmitted at the time of connection.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings.

FIG. 1 shows a coupling device according to the present invention. In a coupling device having male and female splines connecting two shafts on the same axis, a female spline 2 is formed on one shaft side. Connect the cylindrical members 1
An annular member 3 which is substantially integrated with the cylindrical member is fixed to the end of the cylindrical member 1, and a plunger 4 whose tip can be projected from the inner surface side is radially mounted inside the annular member 3 to form a female member. When the male spline 5 is formed on the other shaft side while regulating the phase angle with the spline 2, and when the male spline 5 is inserted into the annular member 3, the tip of the plunger 4 is the male spline 5. The projections are positioned so as to project into the valleys of the above, and the phase angle with the female spline 2 is matched.

As shown in FIG. 1, the cylindrical member 1 is formed with a flange portion 1a at the right end so as to be integrated with one shaft (not shown) by a fastening means such as a bolt. The spline 2 is formed. A pair of bearings 6a, 6b are fitted on the outer peripheral portion of the tubular member 1, the outside of the bearing 6b is a shoulder portion of the tubular member 1, and the outside of the bearing 6a is a bendable chrysanthemum washer 7 and a chrysanthemum washer 7. Its position is fixed by a nut 8. The outer peripheral portions of the bearings 6a and 6b are fixed to the bearing housing 9 like a roll stand of an electric resistance welded steel pipe production line, and the bearing housing 7 is a stand 10.
And so on.

As described above, the annular member 3 is fixed to the end portion of the tubular member 1 by the bolts 11 as shown in FIG. 3, and is integrated, and a male spline inserted into the end surface of the annular member 3. The stopper 12 that regulates the length of 5 is the bolt 1
It is fixed by 3 etc.

The plunger 4 is slidably inserted into one hole 3a of a predetermined depth provided in the radial direction from the outer peripheral surface of the annular member 3 toward the inner peripheral surface thereof, and the protrusion 4a at the tip thereof. Has a length capable of protruding from a small hole 3b formed so as to penetrate from the bottom surface of the hole 3a to the inner peripheral surface. A spring 14 is interposed above the plunger 4 so that the protrusion 4a in the hole 3a always protrudes from the small hole 3b, and a screw portion of a boss 16 fixed to the upper portion of the annular member 3 is provided above the spring 14. There is a spring retainer 17 that is screwed into the spring, and by this, the spring 14 is biased in the direction of pressing the plunger 4 toward the bottom surface side of the hole 3a. And spring 14
The pressing force of can be adjusted by the set length of the spring retainer 17. In the figure, 18 is a foldable washer, and 19 is a nut for the washer. The male spline 5 is integrally connected to a shaft 21 supported by a stand 20.

As shown in FIG. 2, the projecting position of the projecting portion 4a of the plunger 4 is in contact with the root portion of the male spline 5, which is fitted with the fixed female spline 2, on the tooth bottom portion, and the adjacent ridges. The phase angle is set such that there is an angle deviation of α with respect to.

Next, the operation will be described.

In FIG. 3, when the rotatable female spline 2 on one shaft side is connected to the non-rotating male spline 5 on the other shaft side, first, the left side stand 20 is connected to the other side stand 10. And the tip of the male spline 5 is inserted into the inside of the annular member 3.

At this time, since the protrusion 4a of the plunger 4 is in a state of protruding toward the inner surface side, if the tip of the inserted male spline 5 comes into contact with the protrusion 4a at the mountain side portion, it cannot be inserted any further. However, when the tubular member 1, which is the shaft on one side, is rotated at a slight speed, the protrusion 4a falls into the valley side portion of the male spline 5 and comes into contact there. This contact determines the phase and allows the spline 5 to slide toward the female spline 2 side.
The male spline 5 can be fitted to the female spline 2 by sliding while automatically adjusting the gap between the male spline and the valley portion to the left and right. Therefore, the plunger 4 has only the function of adjusting the phase and does not transmit the rotational force or the like, so that the connection can be performed very easily.

Although the present invention has been described in connection with the embodiment of the coupling device applied to the roll stand of the electric resistance welded steel pipe production line, the present invention is not limited to the embodiment and is widely applicable to the connection of two general-purpose shafts. Needless to say, it is applied.

[0026]

As described above, according to the present invention, by presetting the relationship between the phase of the female spline provided on the tubular member and the plunger, when the male spline is inserted into the tubular member, The protrusions are projected to the valley side of the male spline and the angles when engaging with the female spline are the same, and the connection can be easily performed by sliding in that state. Moreover, during this time, the blanker does not transmit the rotational force by the action of only the phase adjustment, and therefore the movable coupling, the fixed coupling,
Since large parts such as springs are not required, the number of parts is extremely small and the structure can be simple.

[Brief description of drawings]

FIG. 1 is a sectional view showing one embodiment of one side of a coupling device according to the present invention.

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a sectional view showing a coupled state of both shafts by the coupling device according to the present invention.

FIG. 4 is a cross-sectional view showing a structure of a conventional coupling device at the time of coupling.

[Explanation of Codes] 1 Cylindrical member 2 Female spline 3 Annular member 3a Hole 3b Small hole 4 Plunger 4a Projection 5 Male spline 11 Bolt 14 Spring 17 Spring retainer

Claims (1)

[Claims] 1. A coupling device having a male and female spline for connecting two shafts on the same axis, wherein a cylindrical member having a female spline formed on one shaft side is connected to an end of the cylindrical member. Is provided with a plunger whose tip can protrude from the inner surface side in the radial direction to regulate the phase angle with the female spline, and forms a male spline on the other shaft side, and the male spline is formed inside the tubular member. The coupling device is characterized in that when it is inserted into the female spline, the tip end of the plunger protrudes into the valley of the male spline and is positioned so that the phase angle with the female spline coincides.