JPS5947169B2 - electromagnetic clutch brake - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetic clutch brake that allows the gap between a lining and an armature to be easily adjusted from the outside.

Referring to FIG. 4, a conventional electromagnetic clutch brake A'
A clutch rotor 3a is mounted on the input shaft 1a via a key 20a, and a key 21a is mounted on the output shaft 2a.
and armature bub 8a for the clutch via 21a'.
and a brake armature bubble 8a' are attached, and the input shaft 1a and the output shaft 2a are connected to the input side bubble 5a,
A ring-shaped clutch stator 4a, which approaches the clutch rotor 3a, is disposed concentrically and rotatably via a bearing in a housing consisting of a drum 14a and an output side bub 11a, and an annular clutch stator 4a that approaches the clutch rotor 3a is attached to the input shaft 1a. A brake stator 9a facing the armature bubble 8a' is attached concentrically with the output shaft 2a on the inner wall of the output side bubble 11a, and a clutch lining L is attached to the armature bubble 8a side of the clutch rotor 3a. A clutch armature 6a is attached to the clutch rotor 3a side of the armature bubble 8a via a ring-shaped leaf spring S1□.

In FIG. 4, the leaf spring S0□ is shown connected to the armature bubble 8a side by the rond R', but at the next location in the circumferential direction, the leaf spring S 1 is connected to the other rond R
The plate springs are connected to the armature 6a side by ', and the connection side of the leaf spring is alternately changed.

An annular brake lining L□2 is attached to the armature bubble 8a' side of the brake stator 9a, and the armature 1a is attached to the brake stator 9a side of the armature bubble 8a' via a ring-shaped leaf spring 812. , the leaf spring S1□ is located at several locations in the circumferential direction,
A plurality of rods R' are alternately connected to the armature bub 8a' and the armature 7a.

In this conventional electromagnetic clutch brake, excitation of the clutch stator 4a causes the armature 6a to be connected to the plate spring S1□.
Clutch rotor 3a and armature bubble 8 are attracted by resisting the elastic force of
a, that is, the connection between the input shaft 1a and the output shaft 2a, while demagnetizing the clutch stator 4a and energizing the brake stator 9a to activate the armature 7a.
is attracted against the elastic force of the leaf spring S□2, and the lining L□
The output shaft 2a is braked by the frictional contact of the armature 1a against the armature 6a,
Due to the frictional contact between γa and the linings L1□, L12, after a certain period of use, the linings L□1. L1□ is worn, and the linings L□□ and L12 are worn, creating a gap. c expands beyond the appropriate value, reducing the magnetic attraction force and therefore the transmitted torque value, and some restoration measures are required. Ta.

A washer-shaped shim 22 has been employed as a conventional configuration for restoring the transmitted torque value.

That is, several shims 22 are inserted between the right edge 23 and the collar 24 of the brake armature bubble 8a', and the armature bubble 8a' is mounted on the output shaft 2a. If the gap C widens beyond the appropriate value due to wear of the lining L1□, remove the shim 22 and change the position of the armature bubble 8a' on the shaft 2a by the amount of the removed shim. Adjust the gap C by shifting it to the right side, and if the gap widens beyond the appropriate value due to force or wear of the lining L Insert the shim 22 into the clutch rotor 3
The position of a itself on the axis 1a was shifted to the right by the amount of the shim, thereby adjusting the air gap.

However, when adjusting the air gap with this conventional electromagnetic clutch brake, it is necessary to disassemble the entire device each time to take out the shim inside the device body and install the shim inside the device body. Even in the gap adjustment, the gap is uniformly reduced by the thickness of the shim, and it has been impossible to finely adjust the gap.

Additionally, the appropriate clearance between the rotor and armature of the clutch and between the stator and armature of the brake is determined by the size of the clutch and brake.

That is, by maintaining this appropriate gap, the performance of the clutch brake can be maintained.

However, when this appropriate gap widens due to wear of the lining, the excitation attraction force becomes weaker in inverse proportion to the square of the distance.
This will result in slippage between the rotor and armature or between the stator and armature before the required torque is achieved.

As a method of measuring whether or not this clearance is appropriate, signs such as a shift in the stop position appear during operation.

In addition, the gap is actually measured using a feeler gauge to determine whether the gap is appropriate and the gap is adjusted, but the conventional technology has the drawbacks mentioned above.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an electromagnetic clutch/brake in which gap adjustment of the electromagnetic clutch/brake can be easily performed from the outside, thereby eliminating the drawbacks of the conventional electromagnetic clutch/brake.

Referring to FIGS. 1 and 2, which show an embodiment of the present invention, an electromagnetic clutch brake A of the present invention is housed in a housing that generally consists of an input side bub 5, a drum 14, and an output side bub 11. An input shaft 1 (!: output shaft 2) is arranged concentrically and rotatably through a bearing, and a clutch rotor 3, which is a ring body, is attached to the right end of the input shaft 1 via a key 20. 3 Annular lining L1 on the right side
are attached concentrically to the shaft 1, and on the inner wall of the input side bubble 5,
An annular clutch stator 4 with a built-in electromagnetic coil,
The right end surface of the clutch stator 4 is the clutch rotor 3.
A ring-shaped armature bubble 8 is attached to the left end of the output shaft 2 via a key 21, and the periphery of the armature bubble 8 An appropriate number of holes 19 are provided on the circumference of the shaft, and the holes 19 are connected to the brake armature 7 at the right end and to the clutch armature 6 at the left end. Rod R is inserted.

Both the armature 6 and the armature 7 are ring-shaped members, and are integrally connected by a rod R that is inserted into a hole 19 around the armature bubble 8.

A ring-shaped leaf spring S1 is disposed between the armature bubble 8 and the clutch armature 6, and the leaf spring S
1 is connected to armature 6 by rod R,
At several other points on the circumference of the leaf spring S1, the leaf spring S1 is connected to the armature bubble 8 side by suitable connecting means (not shown) such as rods R or bolts.
The connection points to the armature 6 and the connection points to the armature bubble 8 are arranged alternately on the circumference of the leaf spring S1.

A ring-shaped leaf spring S2 is attached to the inner wall of the output side bub 11 at several points on the circumference of the leaf spring S2, and is connected concentrically to the shaft 2 by suitable connecting means (not shown) such as bolts. There are through holes 1 in the axial direction at several locations on the circumference of the output side bub 11 aligned with the leaf spring S2.
7, and on the left side of the leaf spring S2 is an annular stator mounting board 10, on the left end surface of which is fixed a similarly annular brake stator 9, which is arranged concentrically with respect to the shaft 2. The stator mounting board 10 is connected by screwing a long head bolt 12, which is an intermediate member inserted through the through hole 17 and exposed to the outside, and the brake stator 9 is a ring body containing an electromagnetic coil at its left end. A ring-shaped lining L2 is attached to the surface.

The output side bub 11 is provided with a male threaded portion 18 on the circumference centered on the output shaft 2, and a ring-shaped adjustment nut 13, which is an adjustment member, is screwed onto the male threaded portion 18. The left end surface contacts the exposed head of the long head bolt 12.

Note that the locations where the leaf spring S2 is coupled to the output side bub 11 and the locations where the leaf spring S2 is coupled to the stator mounting board 10 by the long head bolts 12 are arranged alternately on the circumference of the leaf spring S2. Arranged in a repeating manner.

The above components of this electromagnetic clutch brake are as follows:
When this electromagnetic clutch brake is assembled, the brake armature γ is in contact with the lining L2, and the clutch armature 6 and the lining L are connected to the brake armature γ via a rod R.
In the electromagnetic clutch brake of the present invention, which is designed so that the air gap a between the two holes is equal to or slightly larger than the appropriate value, the clutch stator 4 is energized, and the clutch stator 4 is excited. The armature 6 is attracted toward the clutch rotor 3 against the elastic force of the leaf spring S1, and at this time, the brake armature 7 connected to the armature 6 by a rod R is separated from the lining L2 of the brake stator 9, and the armature 7 is separated from the lining L2 of the brake stator 9. Armature 6 lining L1
The frictional contact between the clutch rotor 3 (l!) and the armature hub 8 and thus the connection between the input shaft 1 and the output shaft 2 takes place, - the brake force, which also demagnetizes the clutch stator 4. Due to the excitation of the stator 9, combined with the elastic return of the leaf spring S1, the armature 6 is separated from the lining L□, and the brake armature 1 is attracted toward the brake stator 9, and the armature γ
The rotation of the armature bub 8 and, therefore, the rotation of the output shaft 2 is braked by the frictional contact of the armature bub 8 with the lining L2.

Now, if the drum 14 is of the type that has an opening on the side as in the past, it is also possible to insert a feeler gauge through the opening, measure the gap a, and adjust the gap as appropriate. However, in this electromagnetic clutch brake, the adjustment nut 13 is screwed into the male threaded portion 18 of the output side bub 11.
The adjustment nut 13 is moved to the left by rotating the adjustment nut 13 clockwise, so that the long head bolt 12 comes into contact with the adjustment nut 13, the stator mounting board 10 connected to the long head bolt 12, and the brake stator. The stator 9 is integrally moved to the left against the elastic force of the leaf spring S2, and the stator 9
Brake armature 7 facing the lining L2 of
Then, the clutch armature 6 connected to the armature 7 by the rod RE is moved to the left against the elastic force of the leaf spring S1, and the clutch armature 6 comes into contact with the lining L1 of the clutch rotor 3, and the gap a is closed. After turning the adjusting nut 13 clockwise to the position where the adjusting nut 13 becomes 0 and cannot be rotated, and after the gap a becomes 0 and the adjusting nut 13 cannot be rotated clockwise, Then, rotate the adjusting nut 13 counterclockwise by the necessary rotation angle corresponding to the appropriate value of the gap a, and then tighten the long head bolt 1.
2. The stator mounting board 10, the brake stator 9, the brake armature 1, and the clutch armature 6 are each restored to the right by the elastic force of the leaf spring S2゜Sl, and the space between the lining L1 and the clutch armature 6 is Adjust the air gap a to an appropriate value.

In the electromagnetic clutch brake of the present invention, in order to recover from a decrease in the transmission torque value due to lining wear and gap expansion, the gap can be easily adjusted by simply rotating the adjusting nut 13 outside the device, without disassembling the entire device. Moreover, this air gap adjustment can also be finely adjusted, and the stator mounting board 10 is
Since it is linked to the output side bubble 11 only by the leaf spring S2, which prevents rotational movement and allows axial movement, it is possible to effectively prevent the occurrence of backlash in the rotational direction, resulting in excellent technical performance. be effective.

As shown in FIG. 3, a short-shaft bolt 15 is used as an intermediate member in place of the long-head bolt 12 in the above embodiment and is screwed onto the stator mounting board 10, and the through-hole 1γ is connected to the female threaded hole 1.
1', and the gap a can be adjusted by screwing an adjusting nut 16, which is an adjusting member, into the female threaded hole 11' and bringing the adjusting nut 16 into contact with the short shaft bolt 15. However, in this configuration, the adjustment rotation amount of each adjustment nut 16 is made strictly the same, and the stator mounting board 1o is moved in parallel to adjust the gap a.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a partial vertical sectional view of an electromagnetic clutch brake according to an embodiment of the present invention, Fig. 2 is a partial front view of the embodiment shown in Fig. 1, and Fig.
The figure is a partial vertical cross-sectional view showing another aspect of the bolt and nut, and FIG. 4 is a partial vertical cross-sectional view of a conventional electromagnetic clutch brake. Explanation of symbols, 1...Input axis, 2...Output axis, 3...
・Clutch rotor, 4...Clutch stator, 5...
・Input side bubble, 6...Clutch armature, 7.
... Brake armature, 8... Armature bubble, 9... Brake stator, 10... Stator mounting board, 11... Output side bub, 12... Long head bolt,
13...Adjusting nut, 14...Drum, 15...
Short shaft bolt, 16...Adjusting nut, 17...Through hole,
18...male thread part, A...electromagnetic clutch brake,
R...rod, S...plate spring, L...lining.

Claims (1)

[Claims] 1 A clutch stator 4 with a built-in electromagnetic coil fixed to the input end bub 5, and a lining L□ fixed to the input shaft 1 on the free end side of the clutch stator 4 and on the sliding surface.
A clutch rotor 3 provided with a lining L1 faces the lining L1 with a gap a and is connected via a leaf spring S1 to an armature bubble 8 fixed to the output shaft 2, so that it is movable in the axial direction and rotates in the direction of rotational force. has an immovable clutch armature 6, a brake armature 1 integrally connected to the clutch armature 6 by a land R with an armature bubble 8 interposed therebetween, and a brake armature 1 facing the brake armature 1, with a lining on the sliding surface. A brake stator 9 with a built-in electromagnetic coil provided with L2, and a stator mounting board 10 which is movable in the axial direction and immovable in the rotational direction by being connected to the output side bubble 11 via a plate spring S2, and the brake stator 9, and a long head bolt 12 that is attached to the stator mounting board 10 with the plate spring S2 interposed therebetween, the head of the long head bolt being attached to the output side bubble 11.
a long head bolt 12 exposed to the outside of the output side bubble 11 through a through hole 17; and an adjustment nut 1 screwed onto the output side bubble 11 so as to be movable in the axial direction on the outside of the output side bubble 11.
3, the electromagnetic clutch brake is characterized in that the adjusting nut 13 is provided, the adjusting nut 13 coming into contact with the head of the long head bolt 12 on the side surface of the adjusting nut 13.