KR102477442B1 - Normally closed disc clamp system and rotary table using same - Google Patents

Abstract

A normally closed braking device according to the present invention comprises: a housing having a rotating disk installed therein; a braking ring; and a pressurizing ring. When fluid is introduced only into a first chamber, the fluid pushes the braking ring to release the braking state of the rotating disk. When the fluid is introduced only into a second chamber, the fluid pushes the braking ring to maintain the braking state of the rotating disk and pushes the pressurizing ring to compress an elastic unit. The elastic unit applies energy generated by compression to the braking ring through the fluid, so the braking ring achieves a double pressure increasing effect. If the action of the fluid disappears, the braking ring still provides a braking effect to the rotating disk through the elastic unit, thereby improving braking stability. In addition, the present invention provides a rotary table using the normally closed braking device as described above.

Description

Normally closed disc clamp system and rotary table using same

The present invention relates to a braking device, and more particularly to a normally closed braking device and a rotary table using the normally closed braking device.

In order to prevent the main shaft from rotating after being machined, a set of dampers is usually placed on the structure, and a braking force is applied to the stopped main shaft to keep the main shaft stable in a stationary state. However, traditional brakes cannot provide braking power to the main shaft in special circumstances (eg, no-alarm power outage or pipeline rupture), which can easily cause damage to the machine and even endanger the safety of nearby personnel.

The normally closed hydraulic brake device disclosed in CN 210024594U presses down the piston with the elasticity of multiple springs in a stop or standby state to lock the main shaft while the brake device is tightly gripped, thereby preventing rotation of the main shaft. When the brake is released, the piston is pushed in the opposite direction by the liquid pressure oil, so that the brake device is released, and the main shaft can operate normally at this time. However, relying only on the braking force provided by a plurality of springs in the above patent literature is very limited and difficult to apply to heavy cutting and high feed situations.

In addition, the conventional normally closed brake shown in FIGS. 1 and 2 mainly includes a brake plate 1, a brake piston 2, a plurality of compression springs 3 and a brake release piston 4, among which compression The spring 3 always applies an axial thrust to the brake plate 1 so that the brake plate 1 maintains a normally closed braking state. When only the brake piston 2 receives a fluid action, an axial thrust is applied to the brake plate 1, and as shown in FIG. 1, the brake piston 2 and the compression spring 3 act together to control The copper plate 1 provides a braking effect to the rotating shaft 5. When only the brake release piston 4 is subjected to a fluid action, an opposite thrust is applied to the brake plate 1 to overcome the axial thrust applied to the brake plate 1 by the compression spring 3, as shown in FIG. As shown, the braking effect of the braking plate 1 on the rotating shaft 5 is released. However, in the prior art described above, since the fluid force received by the brake piston 2 and the elasticity applied to the brake plate 1 by the compression spring 3 have the same direction of force, the fluid force received by the brake piston 2 is The larger the spring, the smaller the elasticity generated by the compression spring 3, and therefore, affects the braking effect provided by the brake plate 1 to the rotary shaft 5, making it difficult to apply to heavy cutting and high feed situations.

A main object of the present invention is to provide a normally closed braking device that can achieve double pressure boosting and normally closed braking effects to improve operation safety and is applied to heavy cutting and high feed situations.

In order to achieve the above-mentioned main object, the normally closed braking device of the present invention includes a housing, a disk set, a braking ring, a pressure ring and an elastic unit.

The housing has a receiving groove; the disk set is installed in the receiving groove of the housing, and includes a first fixed disk, a second fixed disk and a rotating disk, the rotating disk being installed between the first fixed disk and the second fixed disk; The brake ring is movably installed in the receiving groove of the housing, and forms a first chamber between the brake ring and the housing, and in addition, the brake ring has a brake unit, and the brake ring is in a brake position. When located at , the braking part of the braking ring presses the first fixed disk to fix the rotating disk between the first fixed disk and the second fixed disk, and when the braking ring is located in the braking release position, the brake portion of the brake ring releases the first fixed disk to cause the rotating disk to rotate relative to the first fixed disk and the second fixed disk; the pressure ring is installed in the receiving groove of the housing and partially adheres to the brake ring to form a second chamber between the pressure ring and the brake ring; The elastic unit is installed on the pressure ring to provide elasticity to push the pressure ring in the direction of the braking ring.

As can be seen from the foregoing, when the fluid flows into only the first chamber, the brake ring receives the action of the fluid and is maintained at the brake release position, and when the fluid flows into only the second chamber, the brake ring is maintained at the braking position under the action of the fluid, the pressure ring compresses the elastic unit under the action of the fluid, and the direction of the action force applied by the fluid to the pressure ring is such that the elastic unit presses the pressure ring. It is opposite to the direction of the action force applied to the ring, and according to Pascal's principle, since the second chamber is in a sealed state, the energy generated by the compression of the elastic unit is applied to the braking ring through the fluid, The brake ring achieves a double pressure boosting effect. In addition, when the fluid is not introduced into the first chamber and the second chamber, the pressure ring receives the action force applied by the elastic unit to push the braking ring so that the braking ring is maintained in the braking position. Achieve the effect of normally closed braking. In other words, the normally closed brake of the present invention uses a design in which the braking ring and the pressure ring are coupled to the first chamber and the second chamber, and the fluid is supplied to the first chamber and the second chamber, respectively. When introduced, it is possible to control that the braking ring provides a braking release effect and a braking effect to the rotating disk. In addition, in a situation where the fluid does not flow into the first chamber and the second chamber or the effect is lost, the brake ring can still be maintained in the braking position by the partial braking force provided by the elastic unit, and is normally closed. Achieve the effect of braking and improve the safety of operation.

Preferably, the braking ring has an inner ring surface, a sealing ring and a bag drag ring installed adjacent to the sealing ring are inserted and installed on the inner ring surface, and a first flange is provided on a side surface of the pressure ring facing the braking ring. and a second flange adjacent to the first flange, wherein the first flange of the pressure ring is in close contact with the braking ring, and the second flange of the pressure ring is in close contact with the sealing ring and the bag drag ring. . Through this, the sealing ring increases the sealing effect between the braking ring and the pressure ring, and also allows the braking ring to maintain a good equilibrium during operation through the bag drag ring, and the braking ring is inclined to prevent braking. prevent influencing the effect.

Preferably, the braking portion of the braking ring has a braking surface, and when the braking ring is located in the braking position, the braking ring presses the first fixed disk with the braking surface of the braking portion, The radial length of the braking surface does not exceed the area where the first fixed disc, the second fixed disc and the rotating disc overlap each other, so that the braking ring presses the braking disc or the first fixed disc and the rotating disc are pressed against each other. 2 Prevents pressurization of the separation ring installed between the fixed disks.

Preferably, the braking ring further includes an inner ring surface adjacent to the braking surface, and a first included angle is provided between the braking surface and the inner ring surface, and the first included angle is smaller than 90 degrees. 1 The fixed disk is restored to its original state when the brake is released, so that the service life can be extended.

Preferably, the first fixed disk has a pressure receiving section, and when the braking ring is located at the braking position, a second included angle is formed between the pressure receiving section of the first fixed disk and the inner ring surface of the braking ring. And, the second included angle is smaller than or equal to the first included angle, whereby the most desirable clamping effect can be obtained.

Preferably, the elastic unit includes an elastic base and a plurality of elastic bodies, the elastic base is installed in the receiving groove of the housing and adjacent to the pressure ring, and the elastic body is disposed between the pressure ring and the elastic body base. is installed to push the pressure ring in the direction of the braking ring.

In addition, the present invention further provides a rotary table using the above-mentioned normally closed braking device. The rotary table further includes a rotary shaft installed through the receiving groove of the housing in a rotatable manner and fixedly connecting the rotary disk at an outer circumferential surface. Through this, when the braking ring is located at the braking position, the rotating disk is clamped and fixed between the first fixed disk and the second fixed disk so that the rotating shaft generates a braking effect, and the braking ring When positioned at the brake release position, the rotating disk may operate synchronously with the rotating shaft.

The detailed structure, characteristics, assembling or use method of the normally closed braking device and the rotary table using the normally closed braking device provided by the present invention will be described and described in detail in subsequent embodiments. However, those skilled in the art should understand that these detailed descriptions and specific examples listed for carrying out the present invention are merely illustrative of the present invention and do not limit the scope of the present invention.

1 is a partial cross-sectional view of a conventional normally closed brake, showing that a brake plate mainly provides a brake effect to a rotating shaft.
2 is a cross-sectional view of another part of a conventional normally closed brake, mainly showing that the brake plate cancels the brake effect on the rotating shaft.
Figure 3 is a perspective view using a swing-type main shaft head coupled to the rotary table of the present invention.
4 is a perspective view of the rotary table of the present invention.
5 is an exploded perspective view of a normally closed braking device provided by a rotary table of the present invention, in which a housing is not shown.
6 is a side view of the rotary table of the present invention.
FIG. 7 is a partial cross-sectional view taken along the line 7-7 of FIG. 6, mainly showing that the second fluid is not introduced into the second chamber.
FIG. 8 is a partial cross-sectional view taken along the line 8-8 of FIG. 6, mainly showing that the second fluid is not introduced into the second chamber.
FIG. 9 is similar to FIG. 7 and mainly shows the introduction of the second fluid into the second chamber.
FIG. 10 is similar to FIG. 8 and mainly shows the introduction of the first fluid into the first chamber.
11 is a partial cross-sectional view of the normally closed braking device of the present invention, mainly showing the structural relationship between the braking ring and the disk set.
12 is a cross-sectional view of another part of the normally closed braking device of the present invention, mainly showing the angular relationship between the braking ring and the disk set.

What the applicant first explains is that all nouns related to orientation in the entire specification, including the examples and claims introduced below, are based on the direction of the drawings. In the examples and drawings introduced below, the reference numerals of the same elements represent the same or similar elements or their structural characteristics.

Referring to FIGS. 3 and 4, the normally closed braking device 20 of the present invention is used by combining the rotational shaft 12, but the rotational shaft 12 and the rotary table 10 are configured, and the above-described rotational shaft 12 can be assembled with the swing-type main shaft head 14, so that the swing-type main shaft head 14 is driven by the above-described rotary shaft 12 to perform a swing-type operation. 4 and 5, the normally closed braking device 20 of the present invention includes a housing 30, a disk set 40, a braking ring 50, a pressure ring 60 and an elastic unit 70. include

The housing 30 has a receiving groove 31 and an inner flange 32 . The cross-sectional shape of the accommodating groove 31 forms a circle, and the inner flange 32 protrudes and extends in the radial direction from the groove wall of the accommodating groove 31, and as shown in FIGS. 4 and 7, the rotational shaft 12 ) is installed in the receiving groove 31 in a rotatable manner and is surrounded by the inner flange 32. In addition, the housing 30 has a first flow channel 33 communicating with the receiving groove 31 in the radial direction (as shown in FIG. 8) and the receiving groove in the radial direction (as shown in FIG. 7). 31 is further provided with a second flow channel 34 communicating, and at the inlet end of the first flow channel 33, the first fluid 22 (liquid pressure oil, actually gas can be used, A first connector head 16 for injecting (not limited to liquid pressure oil) is installed, and a second fluid 24 (which is liquid pressure oil and can actually use gas) is installed at the inlet end of the second flow channel 34 and a second connector head 18 for injecting liquid pressure oil).

The disk set 40 is installed in the receiving groove 31 of the housing 30 and includes a first fixed disk 41, a second fixed disk 42, a separation ring 43 and two stacked rotating disks 44. ), and as shown in FIGS. 5 and 7, the first fixing disk 41, the second fixing disk 42, and the separation ring 43 are provided with a plurality of screws 45 to form the housing 30. ) are fixed together to the inner flange 32, the second fixing disk 42 of which is closer to the inner flange 32 of the housing 30 than the first fixing disk 41, and the separation ring 43 ) is located between the first fixed disk 41 and the second fixed disk 42 to space them apart. As shown in FIG. 7, the outer periphery of the two rotating disks 44 is located between the first fixed disk 41 and the second fixed disk 42, and the inner circumferential edge of the two rotating disks 44 is It is fixed to the outer flange 122 of the rotary shaft 12 using a plurality of screws 46, allowing the two rotary disks 44 to rotate together along the rotary shaft 12.

The braking ring 50 is installed in the receiving groove 31 of the housing 30 in a forward and backward movable manner and also connects the first chamber 54 communicating with the housing 30 through the first flow channel 33. Formed (as shown in FIG. 8), the front and both ends of the first chamber 54 are sealed by the housing 30 and the brake ring 50, respectively. The braking ring 50 is installed adjacent to the disk set 40, and on the side of the braking ring 50 facing the disk set 40, the braking unit 52 protrudes and extends, and the braking ring 50 is shown in FIG. 9 When located at the braking position P1 shown in , the braking ring 50 presses the first fixed disk 41 with the braking unit 52 so that the first fixed seat 41 is elastically deformed and the rotating disk 44 to be clamped between the first fixed disk 41 and the second fixed disk 42, and when the brake ring 50 is located at the brake release position P2 shown in FIG. 10, the brake ring 50 The braking unit 52 releases the first fixed disk 41 to restore the first fixed disk 41 to its original state, and the rotating disk 44 at this time moves along the rotating shaft 12 to the first fixed disk 41. and the second fixed disk 42 to rotate relative to each other.

The pressure ring 60 is installed in the receiving groove 31 of the housing 30 and installed adjacent to the braking ring 50, and the first flange 61 on the side of the pressure ring 60 facing the braking ring 50 And the second flange 62 adjacent to the first flange 61 is protruded and stretched, and as shown in FIG. 7, the pressure ring 60 presses the braking ring 50 with the first flange 61 to A second chamber 63 is formed between the pressure ring 60 and the braking ring 50, and the outside of the second chamber 63 communicates with the second flow channel 34, and the second chamber 63 The inside of is sealed by the first flange 61. As shown in FIG. 7, the pressure ring 60 is in close contact with the inner ring surface 51 of the braking ring 50 by the second flange 62, and is attached to the inner ring surface 51 of the braking ring 50. The sealing ring 55 and the bag drag ring 56 installed adjacent to the sealing ring 55 are inserted and installed, on the one hand, the sealing effect between the two is increased by the sealing ring 55, and on the other hand, the bag drag ring ( By means of 56, the brake ring 50 can maintain good equilibrium during operation, preventing the brake ring 50 from inclining and affecting the braking effect.

The elastic unit 70 is installed in the receiving groove 31 of the housing 30, and includes an annular elastic base 71, a plurality of elastic bodies 73 (compression springs as an example) and a plurality of pin members 74 to provide The elastic base 71 is fixedly installed in the housing 30 and installed adjacent to the pressure ring 60, and has a plurality of concave holes 64 on the side of the pressure ring 60 facing the elastic base 71, (As shown in FIG. 7), having a plurality of count bores 72 on the side facing the pressure ring 60 of the elastic base 71 (as shown in FIGS. 5 and 7), the elastic body 73 is installed between the concave hole 64 and the count bore 72 in a one-to-one manner, and one end of the elastic body 73 adheres to and supports the elastic body base 71, and the elastic body 73 The other end of the pushes the pressure ring 60 in the direction of the braking ring 50 by providing elasticity in close contact with the pressure ring 60; The pin member 74 is installed through the elastic body 73 in a one-to-one manner and is screwed into the count bore 72 to provide a supporting effect to the elastic body 73 .

In actual operation, the second fluid 24 is introduced into the second flow channel 34 using the second connector head 18 so that the second fluid 24 enters the second chamber 63 . As shown in FIG. 9 , the second fluid 24 pushes the brake ring 50 on the one hand so that the brake ring 50 remains in the brake position P1 shown in FIG. 9 and on the other hand The second fluid 24 pushes the pressure ring 60 so that the pressure ring 60 compresses the elastic body 73, the second chamber 63 is in a sealed state, and the second fluid 24 is pressurized. Since the acting force applied to the ring 60 and the acting force applied to the pressure ring 60 of the elastic body 73 have opposite directions, according to Pascal's principle, the elastic body 73 is compressed The generated energy passes through the second fluid 24 and acts on the brake ring 50, causing the brake ring 50 to achieve a double pressure boosting effect. That is, when the second fluid 24 is introduced into the second chamber 63, Ft=F ₁ +F ₂ , where Ft is the total braking force provided by the braking ring 50, and F ₁ is the second The thrust applied by the fluid 24 to the brake ring 50, F ₂ is the energy generated when all the elastic bodies 73 are compressed, and the action force applied by the second fluid 24 to the pressure ring 60 is Since the energy generated by the compression of the elastic body 73 is greater, the total braking force that can be provided by the braking ring 50 also increases accordingly.

Conversely, in order to make the rotating shaft 12 operate normally, first stop introducing the second fluid 24 into the second chamber 63, and then use the first connector head 16 to flow the first flow channel 33 ) to allow the first fluid 22 to enter the first chamber 54, and as shown in FIG. 10, the first fluid 22 drives the braking ring 50 First push, and then the brake ring 50 pushes the pressure ring 60. At this time, since the elastic body 73 still applies an action force to the pressure ring 60, the action force applied by the first fluid 22 to the braking ring 50 is the force applied by the elastic body 73 to the pressure ring 60. When greater than the working force, the brake ring 50 may be maintained at the brake release position P2 shown in FIG. 10 . At this time, since the rotating disk 44 is not clamped by the first fixed disk 41 and the second fixed disk 42, the rotating shaft 12 can operate normally.

When the supply of the second fluid 24 becomes invalid due to a special situation (for example, no-alarm power failure or pipe rupture), the braking ring 50 loses the thrust provided by the second fluid 24, but the elastic body ( 73 can still apply a working force to the brake ring 50 through the pressure ring 60, so that the brake ring 50 is maintained in the braking position P1 shown in FIG. To achieve the effect of stopping safely. In other words, in a normal state, the brake ring 50 provides a complete braking force to the rotating disk 44 by using the action force of the second fluid 24 and the action force generated when the elastic body 73 is compressed, and if 2 When the supply of the fluid 24 becomes invalid, the partial braking force provided by the elastic body 73 can still maintain the braking ring 50 at the braking position P1 shown in FIG. effect, and further improve the safety of operation.

What should be additionally explained is that, as shown in FIG. 11, the braking part 52 of the braking ring 50 has a braking surface 53 that presses the first fixed disk 41, and the braking surface ( The radial length L of 53) does not exceed the area where the first fixed disk 41, the second fixed disk 42 and the rotating disk 44 overlap each other, and the radial length of the braking surface 53 If (L) exceeds the above range, pressing the rotating disk 44 may cause damage to the rotating disk 44, and pressing the separation ring 43 may also affect the braking effect. As shown in FIG. 12, the braking surface 53 is adjacent to the inner ring surface 51 and has a first included angle θ ₁ smaller than 90 degrees between the inner ring surface 51 and the inner ring surface 51. If the 1 included angle θ ₁ is 90 degrees or more, the first fixed disk 41 may be deformed after being pressed against the braking surface 53, resulting in a state similar to an S shape, making recovery difficult. This can easily affect the operation of the rotating disk 44 in the brake release state, and when the first included angle θ ₁ is smaller than 90 degrees, the first included angle θ ₁ is the first fixed disk 41 Close to the deformation angle of , there is only one bending point on the first fixed disk 41 , and the life effect of the cutting force on the first fixed disk 41 can be effectively improved. In addition, the first fixed disk 41 has a pressure receiving section 412 pressed by the braking surface 53, and the pressure receiving section 412 of the first fixed disk 41 and the inner ring of the braking ring 50 A second included angle θ ₂ is provided between the surfaces 51, and the second included angle θ ₂ is smaller than or equal to the first included angle θ ₁ , and through the above-described special angle design, on the other hand, the most desirable A clamping effect can be obtained, and on the other hand, the first fixed disk 41 can be smoothly restored to its original state in the braking released state, prolonging the service life of the first fixed disk 41 .

In summary, the normally closed brake 20 of the present invention uses a design in which the brake ring 50 and the pressure ring 60 are coupled to the first chamber 54 and the second chamber 63, By introducing the first fluid 22 and the second fluid 24 into the first chamber 54 and the second chamber 63, respectively, the braking ring 50 has a braking release effect and braking effect on the rotating disk 44 It is possible to control providing the effect, and also, without introducing the first fluid 22 into the first chamber 54, the second fluid 24 (or the second fluid 24) into the second chamber 63 ) In a state where supply lapse) is not flowing, the braking ring 50 can still be maintained at the braking position P1 by the partial braking force provided by the elastic body 73, thereby achieving the effect of normally closed braking , and further improves the safety of operation, so it can be applied to heavy cutting and high feed conditions.

[Prior art]
1: brake plate
2: brake piston
3: compression spring
4: brake release piston
[Invention]
10: rotary table
12: axis of rotation
122: outer flange
14: swing type spindle head
16: first connector head
18: second connector head
20: normally closed braking system
22: first fluid
24: second fluid
30: housing
31: receiving groove
32: inner flange
33 first flow channel
34 second flow channel
40: disk set
41: first fixed disk
412: water pressure section
42: second fixed disk
43: separation ring
44: rotating disk
45: screw
46: screw
50: braking ring
51: inner ring surface
52: braking unit
53: braking surface
54: first chamber
55: sealing ring
56: back drag ring
L: diametrical length of the braking surface
P1: Braking position
P2: brake release position
60: pressure ring
61: first flange
62: second flange
63: second chamber
64: concave hole
70: elastic unit
71: elastic base
72: count bore
73: elastic body
74: pin member
θ ₁ : first included angle
θ ₂ : Second included angle

Claims (7)

In the normally closed braking device including a housing, a disk set, a braking ring, a pressure ring and an elastic unit,
The housing has a receiving groove;
the disk set is installed in the receiving groove of the housing, and includes a first fixed disk, a second fixed disk and a rotating disk, the rotating disk being installed between the first fixed disk and the second fixed disk;
When the braking ring is movably installed in the receiving groove of the housing, forms a first chamber between the housing and the braking ring, has a braking unit, and is located in a braking position. , The braking unit of the braking ring presses the first fixed disk to fix the rotating disk between the first fixed disk and the second fixed disk, and when the braking ring is located in the braking release position, the braking the brake portion of the ring releases the stationary disk and causes the rotating disk to rotate relative to the first stationary disk and the second stationary disk;
the pressure ring is installed in the receiving groove of the housing and partially adheres to the brake ring to form a second chamber between the pressure ring and the brake ring;
The elastic unit is installed on the pressure ring to push the pressure ring in the direction of the braking ring,
Among them, when the fluid flows into only the first chamber, the brake ring receives the action of the fluid and is maintained at the brake releasing position, and when the fluid flows into only the second chamber, the brake ring receives the action of the fluid. It is maintained at the braking position, and the pressure ring compresses the elastic unit under the action of the fluid, and the direction of the action force applied by the fluid to the pressure ring is equal to the action force applied to the pressure ring by the elastic unit. opposite to the direction, and when the fluid is not introduced into the first chamber and the second chamber, the pressure ring receives the action force applied by the elastic unit to push the braking ring so that the braking ring is in the braking position. to keep,
Normally closed braking system. According to claim 1,
The braking ring has an inner ring surface, and a sealing ring and a bag drag ring installed adjacent to the sealing ring are inserted and installed on the inner ring surface, and a first flange and a first flange are installed on a side surface of the pressure ring facing the braking ring. A second flange adjacent to the first flange, wherein the first flange of the pressure ring is in close contact with the braking ring, and the second flange of the pressure ring is in close contact with the sealing ring and the bag drag ring. expression braking device. According to claim 1,
The braking part of the braking ring has a braking surface, and when the braking ring is located in the braking position, the braking ring presses the first fixed disk with the braking surface of the braking part, and A radial length does not exceed an area where the first fixed disk, the second fixed disk and the rotating disk overlap each other. According to claim 1,
The braking portion of the braking ring has a braking surface, and when the braking ring is located in the braking position, the braking ring presses the first fixed disk with the braking surface of the braking portion, and the braking ring and further comprising an inner ring surface adjacent to the braking surface, a first included angle between the braking surface and the inner ring surface, wherein the first included angle is less than 90 degrees. According to claim 4,
The first fixed disk has a pressure receiving section, and when the braking ring is located at the braking position, the braking ring presses the pressure receiving section of the first fixed disk with the braking surface of the braking part, and A second included angle is provided between the pressure receiving section of the first fixed disk and the inner ring surface of the brake ring, wherein the second included angle is smaller than or equal to the first included angle. According to claim 1,
The elastic unit includes an elastic base and a plurality of elastic bodies, the elastic base is installed in the receiving groove of the housing and is installed adjacent to the pressure ring, and the elastic body is installed between the pressure ring and the elastic body base, A normally closed braking device that pushes the pressure ring in the direction of the braking ring. The normally closed braking device according to any one of claims 1 to 6; and
A rotating shaft movably installed in the receiving groove of the housing
including,
The outer circumferential surface of the rotating shaft is fixedly connected to the rotating disk so that the rotating shaft operates synchronously with the rotating disk.
rotary table.

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