JPS624740Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a friction type coupling device, and particularly in an electromagnetic type, the air gap can be easily adjusted. Generally, this type of unit product that integrates a starting device and a braking device is easy to install, so it is widely used, but if the lining becomes worn, the gap between it and the armature becomes large, making it difficult to maintain the initial performance. To prevent this, conventionally the unit product had to be disassembled to adjust the air gap.

Hereinafter, a conventional device of this type will be explained based on FIG. In the figure, 1 is a drive shaft connected to a drive source (not shown), 2 is a driven shaft provided opposite to this drive shaft 1, and 3 is a driven shaft that is incorporated into the drive shaft 1 via a key (not shown). One friction plate 4 is fixed to an annular rotor made of a magnetic material. Reference numeral 5 denotes an annular stator made of a magnetic material, provided with gaps in the radial and axial directions from the rotor 3, and is fixed to the bracket 6 with bolts (not shown). 7,
A bearing 8 supports the drive shaft 1, and is incorporated into the bracket 6. Reference numeral 9 represents a connecting means built into the stator 5. One excitation coil,
10 is a hub fixed to the driven shaft 2 with a key 34; 11 is one armature made of a magnetic material provided with a predetermined gap g ₁ in the axial direction from the friction plate 4; It is integrated with a rivet and bolt 13 (not shown) via a leaf spring 12.

14 is an annular stator made of a magnetic material, 15 is the other coil which is a connecting means built into the stator 14, 16 is the other friction plate fixed to the stator 14, and 17 is the other coil attached to the stator 14. It is fixed to a bracket 19 by bolts 18 with an integrated flange. Bearings 20 and 21 support the driven shaft 2, and are incorporated into the bracket 19. 22 is an axial gap g ₂ in the other friction plate 16.
The other armature installed across the hub 2
3 and is fixed via a leaf spring 24 with rivets and bolts 33 (not shown). Note that the hub 23 is integrated with the driven shaft 2 and a key 32. Reference numeral 25 indicates a gap g ₁ , 26 indicates a gap g ₂ , and 27 indicates a washer for adjusting the gaps g ₁ and g _2. Several washers are inserted in each. 28 is a retaining ring, and 29 is a housing, which is fixed to the brackets 6, 19 with bolts 30, 31.

Next, the operation of this embodiment will be explained. First, rotational torque transmitted from a drive source to the drive shaft 1 by a pulley (not shown) or the like is also transmitted to the rotor 3 via a key (not shown). Here, when a current is applied to the coil 9 from a power supply (not shown) to excite it, a magnetic flux Φ ₁ is generated in the magnetic path shown by the dotted line in the figure, and one armature 11 is caused by the attractive force of the magnetic flux Φ ₁ of the coil 9 to cause the leaf spring 12 to The armature 11 is attracted to the rotor 3 against the elastic force of the rotor 3, and the armature 11 is connected to the friction plate 4.
Therefore, the rotational torque transmitted from the drive source via the drive shaft 1 is transmitted to the driven body 2 through the connection between the friction plate 4 of the rotor 3 and the armature 11.

Next, when stopping the driven shaft 2 to which rotational force is being transmitted, the current in one of the coils 9 connecting the rotor 3 and the armature 11 is briefly cut off to release the excitation, and at the same time (not shown) It is sufficient to excite the other coil 15 by passing a current through the other coil 15 from the power source. Then, the coil 15 generates a magnetic flux Φ ₂ in the magnetic path shown by the dotted line in the figure, and the attractive force of the magnetic flux Φ ₂ causes the other armature 22 to be fixed to the bracket 19 against the elastic force of the leaf spring 24. It is connected to the other friction plate 16, and rotation of the driven shaft 2 is stopped. The above-described operations are repeated to start and stop the load connected to the driven shaft 2.

In a device having the above structure, considering assembly, the suction gaps g ₁ and g ₂ accumulate errors during manufacturing of each part, and it is difficult to keep the gaps g ₁ and g ₂ constant. Have difficulty. Therefore, temporarily assemble once, measure the gaps g ₁ and g ₂ , and adjust the position of each hub 10, 23 using washers 25, 26,
It was determined by adjusting the position of 27.
Therefore, it takes a considerable amount of time to assemble the friction plates 4 and 16, and each time the start and stop are repeated, the friction plates 4 and 16 are worn out and gaps are formed.
g ₁ and g ₂ increase, and when these gaps reach a certain value, the elastic force of the leaf springs 12 and 24 becomes greater than the attractive force of each coil 9 and 15, so even if each coil is excited, The armature no longer attracts air, and it is necessary to reset the gaps g ₁ and g ₂ to their initial values. In this case, first, bolt 3
1, remove the entire driven side, remove the retaining ring 28 from the entire driven side, remove the hubs 10 and 23 from the driven shaft 2, change the positions of the washers 25, 26, and 27, and remove the gaps g ₁ and g _2. This is to adjust the
However, the keys 32 and 34 that fix the hubs 10 and 23 are generally in a driven state, and the hubs 10 and 23 are attached to the driven shaft due to heat during use.
It has become stuck and cannot be easily removed. Therefore, it took a considerable amount of time and effort to remove it. Furthermore,
In the worst case, the hub and the driven shaft would become completely integrated, making it impossible to adjust the gaps g ₁ and g ₂ and the product would be discarded.

The present invention has been devised in view of the above, and is intended to shorten assembly time and facilitate gap adjustment.

An embodiment of this invention shown in FIGS. 2 and 3 will be described below. A hub 35 is fixed to the driven shaft 2 by a key (not shown), and leaf springs 12 and 24 are fixed to both axially side surfaces of the hub.
36 is a flange fixed to the stator 14 and forms a fixed main body together with the stator 14, the coil 15, and the friction plate 16; 37 is the flange 36 and the housing 29;
They are stacked one on top of the other with spacers inserted between them, and are provided at several locations all around the circumference.

In the above configuration, considering assembly, the hub 35 is assembled into the driven shaft 2 without a washer or temporary assembly, and first, the gap g ₁ is adjusted by inserting a spacer 37 between the housing 29 and the flange 36. Then, the gap _g2 can be adjusted during final assembly by inserting a spacer 37 between the flange 36 and the bracket 19 (note that the spacer 37 is not inserted in FIG. 2). Therefore, the assembly time is extremely short. Furthermore, if the friction plates 4, 16 are worn out and the gaps g ₁ , g ₂ become larger and need to be adjusted, this can be easily done by removing the bolts 31 and changing the position of the spacer 37. That is, the gap g ₂ can be adjusted by inserting the spacer 37 inserted between the housing 29 and the flange 36 between the flange 36 and the bracket 19 as shown in FIG. 3, and the gap g ₁ can be adjusted as follows. This can be done by removing the spacer between the housing 29 and the flange 36. Therefore, it is not necessary to remove the hub 35 from the driven shaft 2 as in the conventional case, and this can be done easily.

Furthermore, in this embodiment, since there is no need to divide the hub 35 into two parts, the starting side and the braking side, the number of parts is reduced and the overall length is shortened, resulting in miniaturization. Furthermore, since the flange 36 is placed outside the stator 14, it can be inserted between the housing 29 and the bracket 19, so they can be tightened together with the bolts 31, which further reduces the number of parts and machining operations, resulting in lower cost. .

Although the above description has been about a leaf spring drive method in which the armature is driven via a leaf spring, it goes without saying that other drive methods can also be applied.

As described above, according to the device of the present invention, the starting device and the braking device can be connected by inserting spacers into the fastening surfaces of the housing and the fixed main body that house the components constituting the device, and between the fixed main body and the bracket. Since the first gap and the second gap are adjusted, the gap can be easily adjusted by inserting or removing the spacer between the housing and the bracket, which simplifies maintenance. It is something. Furthermore, since there is no need for temporary assembly during assembly, the cost is reduced.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view showing a conventional device, FIG. 2 is a partial sectional view showing an embodiment of this invention, and FIG. 3 is a partial sectional view of FIG. 2. In the figure, 11 is a drive shaft, 2 is a driven shaft, 3 is a rotor, 4 and 16 are friction plates, 6 and 19 are brackets,
9, 15 are coils, 11, 22 are amateurs, 1
2 and 24 are leaf springs, 29 is a housing, 31 is a bolt, 35 is a hub, 36 is a flange, and 37 is a spacer. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] A rotating main body fixed to a drive shaft and having a first friction plate, a first armature opposite to the friction plate of the rotating main body with a first gap in the axial direction of the drive shaft, and a driven drive supporting the armature. a shaft, a first connecting means for connecting the armature to the first friction plate, a second armature supported by the driven shaft, and a second armature that faces the armature in the axial direction via a second gap. a fixed main body having a friction plate; a second connecting means for connecting the second armature to the second friction plate; a housing that houses each of the components and supports the drive shaft; and a shaft of the housing. A bracket is provided on the end face of the housing to sandwich and fasten the fixed main body and support the driven shaft, and a spacer is inserted between the end face of the housing and the fixed main body, and between the fixed main body and the bracket. A friction coupling device characterized in that the first and second gaps can be adjusted independently.