Balancing device and balancing system including the same

Abstract

According to one embodiment of the present invention, the present invention can provide a balancing device, which includes: an elevator drum connected to an elevator car; a central gear portion connected to a first drive shaft of the elevator drum, including a first central gear; and a peripheral gear portion, including a first peripheral gear that contacts and rotates with the first central gear, when the elevator drum is subjected to a force in a first direction due to the elevator car, the central gear portion applies a force to the elevator drum in a direction opposite to the first direction with the help of the force applied by the peripheral gear portion.

Description

Technical Field

[0001] The invention relates to a balancing device and a balancing system comprising the same. Background Art

[0002] Generally, for elevators used in residential or commercial buildings, an elevator shaft is vertically formed inside the building, and an elevator car and a counterweight move up and down along the elevator shaft to transport passengers or goods.

[0003] As a result, the required area of ​​the elevator shaft is occupied by an area equivalent to the moving distance of the elevator car and the counterweight, resulting in a problem of reduced dedicated area of ​​the building. The resulting economic losses multiply as the building becomes larger and the construction cost rises, thereby placing a huge burden on the builders.

[0004] In order to solve this problem, Korean Patent No. 10-1817143B1 and Korean Patent No. 10-1917222B1, which are the priority patents of the present applicant, proposed an invention of reducing the diameter of the counterweight wire rope drum by increasing the diameter of the elevator wire rope drum, or providing a gear between the elevator wire rope drum and the counterweight wire rope drum, thereby reducing the moving distance of the counterweight.

[0005] However, in this case, there is a problem that the load needs to be increased.

[0006] Specifically, when the load of the elevator car is applied to the outside of the elevator rope drum with a larger diameter and the load of the counterweight is applied to the outside of the counterweight rope drum with a smaller diameter, the shaft connected to the elevator rope drum receives a larger torque than the shaft connected to the counterweight rope drum. Therefore, in order to offset this torque difference, there is a problem of increasing the load of the counterweight. Summary of the invention

[0007] Technical issues

[0008] The embodiments of the present invention are proposed to solve the above-mentioned problems. An object of the present invention is to provide a balancing device and a balancing system including the balancing device that can replace the existing balancing weight to reduce space.

[0009] Furthermore, an object of the present invention is to provide a balancing device and a balancing system that can be used in place of a balancing weight in all existing devices that use a balancing weight.

[0010] Technical Solution

[0011] According to one embodiment of the present invention, the present invention can provide a balancing device, which includes: an elevator drum connected to an elevator car; a central gear portion connected to a first drive shaft of the elevator drum, including a first central gear; and a peripheral gear portion, including a first peripheral gear that contacts and rotates with the first central gear, when the elevator drum is subjected to a force in a first direction due to the elevator car, the central gear portion applies a force to the elevator drum in a direction opposite to the first direction with the help of the force applied by the peripheral gear portion.

[0012] Furthermore, the present invention can provide a balancing device, in which the central gear portion includes a first central gear and a second central gear rotating in contact with each other, the first central gear being connected to a first driving shaft, and the peripheral gear portion includes: a first peripheral gear meshing with the first central gear; and a second peripheral gear meshing with the second central gear, the first central gear and the second central gear being fixed in the up and down direction (direction of gravity), and the first peripheral gear and the second peripheral gear being able to move in the up and down direction (direction of gravity).

[0013] Furthermore, the present invention can provide a balancing device, which further includes: a moving part, which can move relative to the central gear part while being connected to the outer gear part; a balancing weight, which is arranged on one side of the moving part; and a load adjustment part, which can apply force to the moving part.

[0014] Furthermore, the present invention may provide a balancing device, wherein the balancing device further includes an auxiliary gear disposed on an upper side of the outer gear portion and meshing with the central gear portion.

[0015] According to one embodiment of the present invention, the present invention can provide a balancing system, which further includes: the above-mentioned balancing device; a power connection portion connected to the first drive shaft; and an auxiliary balancing device capable of applying force to the first drive shaft through the above-mentioned power connection portion.

[0016] Furthermore, the present invention can provide a balancing system, in which the auxiliary balancing device includes: a plurality of connecting ropes connected to the power connecting part; and a balancing rod, fixing the connecting ropes on one side and arranging a movable counterweight on the other side, and the force applied from the balancing rod to the power connecting part changes according to the position of the movable counterweight.

[0017] Furthermore, the present invention may provide a balancing system, wherein the plurality of connecting ropes are connected to the balancing pole via rollers disposed on the upper side of the balancing pole and rollers disposed on the lower side.

[0018] Furthermore, the present invention can provide a balancing system, in which the auxiliary balancing device and the power connecting part are connected by a first connecting rope, a second connecting rope and a third connecting rope, the first connecting rope applies a force to rotate the first gear of the power connecting part, the second connecting rope applies a force to rotate the third gear of the power connecting part, and the third connecting rope applies a force to rotate the second gear of the power connecting part, when the third gear rotates in a clockwise direction, the second gear and the first gear rotate in a counterclockwise direction, when a force to raise the third connecting rope is generated by the balance rod, the third connecting rope causes the second gear to rotate in a counterclockwise direction, and as the second gear rotates in a counterclockwise direction, the third gear will rotate in a clockwise direction and pull the second connecting rope, thereby causing the first drive shaft to rotate to offset the force applied by the elevator car.

[0019] Furthermore, the present invention can provide a balancing system, which includes: a plurality of first center gears, separated from each other and arranged in parallel; a plurality of second center gears, separated from each other and arranged in parallel; a first peripheral gear directly connected to a first center gear and a second peripheral gear directly connected to a second center gear; and a first peripheral gear indirectly connected to another first center gear and a second peripheral gear indirectly connected to another second center gear.

[0020] Furthermore, the present invention can provide a balancing system, in which the force applied to the power connection part changes according to the distance X1 between the first fixed part of the balance pole and the movable counterweight and the distance X2 between the first fixed part and the second fixed part of the balance pole.

[0021] Effects of the Invention

[0022] The balancing device and the balancing system including the same according to the embodiment of the present invention have the advantage of being able to replace the existing balancing weight to reduce space.

[0023] Furthermore, the present invention has the advantage that it can be used in place of a balancing weight in all existing devices that use a balancing weight.

[0024] Furthermore, the present invention can offset the torque on the rotating shaft of power generation and industrial machinery.

[0025] Moreover, according to the moving distance of the elevator, the proportion of the moving distance can be adjusted at will by the balancing weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 FIG. 1 is a diagram conceptually showing a balancing system 1 according to an embodiment of the present invention.

[0027] Figure 2 For conceptual illustration, see from the side Figure 1 FIG. 1 is a diagram of a state of the balancing device 10 .

[0028] Figure 3 For conceptual illustration, see from the side Figure 1 FIG. 8 is a diagram showing a state of the auxiliary balancing device 80 .

[0029] Figure 4 For conceptual illustration, viewed from the front Figure 1 FIG. 7 is a diagram showing the states of the third gear 712 , the second gear 722 and the first gear 732 .

[0030] Figure 5 A diagram showing an embodiment of shortening the roping distance of the balancing shaft.

[0031] Figure 6 FIG. 1 is a diagram showing a balancing system 1 ′ according to yet another embodiment of the present invention.

[0032] Figure 7 FIG. 1 is a diagram showing a balancing system 1 ′ according to yet another embodiment of the present invention.

[0033] Figure 8 FIG. 2 is a diagram showing a balancing device according to another embodiment of the present invention.

[0034] Fig. 9 For conceptual illustration Figure 8 A side view of a first peripheral gear 210'' indirectly connected to a first central gear 110'' and a second peripheral gear 220'' indirectly connected to a second central gear 120'' in a balancing device.

[0035] Fig.10 FIG. 1 is a diagram briefly showing a balancing system 1 ″ according to another embodiment of the present invention.

[0036] Fig.11 For conceptual illustration, see from the side Fig.10 FIG. 1 is a diagram showing the state of the balancing device 10 ″.

[0037] Fig.12 To show Figure 5 FIG. 1 is a diagram of a modified example of .

[0038] Fig.13 To show Fig.12 FIG. 4 is a diagram of an embodiment in which the first reel, the second reel and the third reel are respectively connected to a plurality of first connecting ropes R1, a third connecting rope R3 and a second connecting rope R2. DETAILED DESCRIPTION

[0039] Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. Meanwhile, in the process of describing the present invention, when it is determined that the detailed description of the related known structures or functions makes the present invention unclear, the detailed description thereof will be omitted.

[0040] Figure 1 FIG. 1 is a diagram conceptually showing a balancing system 1 according to an embodiment of the present invention. Figure 2 For conceptual illustration, see from the side Figure 1 A diagram of the state of the balancing device 10, Figure 3 For conceptual illustration, see from the side Figure 1 A diagram showing the state of the auxiliary balancing device 80, Figure 4 For conceptual illustration, viewed from the front Figure 1 FIG. 7 is a diagram showing the states of the third gear 712 , the second gear 722 and the first gear 732 .

[0041] Figures 1 to 4 It should be understood that it is conceptually shown for the convenience of explanation.

[0042] and, Figure 1 The balance system 1 is conceptually shown as viewed from above and below. Figure 2 and Figure 3 The balancing device 10 and the auxiliary balancing device 80 are conceptually shown as viewed from the side.

[0043] Reference Figures 1 to 4 A balancing system 1 according to an embodiment of the present invention may include: an elevator car 30; an elevator drum 20 connected to the elevator car 30; and a balancing device 10 that works in a linkage manner with the elevator drum 20.

[0044] The balancing device 10 of this embodiment can replace the existing balancing weight, thereby eliminating the moving space of the balancing weight and achieving space saving.

[0045] For example, when the elevator drum 20 is subjected to a force in a first direction due to the elevator car 30, the balancing device 10 may apply a force to the elevator drum 20 in a direction opposite to the first direction.

[0046] Specifically, the balancing device 10 may include: an elevator drum 20, connected to the elevator car 30; a pair of central gear parts 100, connected to the first drive shaft L1 of the above-mentioned elevator drum 20, rotating in contact with each other; and a pair of peripheral gear parts 200, respectively contacting and rotating with the pair of central gear parts 100.

[0047] In this case, when the elevator drum 20 receives a force in a first direction due to the elevator car 30 , the central gear part 100 may apply a force to the elevator drum 20 in a direction opposite to the first direction by means of the force applied by the outer gear part 200 .

[0048] exist Figure 1 In the embodiment shown, the elevator drum 20 is subjected to a clockwise rotation (in Figure 1As a reference, when observing from the left side to the right side), the first direction can be understood as a clockwise direction.

[0049] However, the concept of the present invention is not limited thereto, and the first direction may be changed according to the relative positions of the elevator car 30 and the elevator drum 20 .

[0050] The elevator car 30 may be disposed at a lower portion between the two elevator drums 20, 20'. However, the position where the elevator car 30 is disposed is not limited thereto.

[0051] The elevator drum 20 and the central gear unit 100 may be connected via the first drive shaft L1. That is, the central gear unit 100 and the elevator drum 20 may be relatively fixed via the first drive shaft L1, and when the central gear unit 100 receives force from the peripheral gear unit 200, the elevator drum 20 may also receive the same force.

[0052] The pair of sun gear parts 100 may include a first sun gear 110 connected to the first driving shaft L1 and a second sun gear 120 meshing with the first sun gear 110 .

[0053] Also, the pair of outer gear parts 200 may include a first outer gear 210 meshed with the first central gear 110 and a second outer gear 220 meshed with the second central gear 120 .

[0054] Also, the first central gear 110 and the second central gear 120 are fixed in the up-down direction, and the first peripheral gear 210 and the second peripheral gear 220 can move up-down.

[0055] The pair of outer gear parts 200 can act on the pair of central gear parts 100 through the principle of leverage. For example, when the moving part 400 applies a load downward, as the first outer gear 210 presses the central gear part 100 downward, the first outer gear 210 can rotate clockwise and the first central gear 110 can rotate counterclockwise.

[0056] Also, the force applied by the outer gear part 200 to the central gear part 100 may vary according to the relative position of the outer gear part 200 and the central gear part 100 .

[0057] The central gear part 100 and the peripheral gear part 200 may be formed of materials such as resin rubber, alloy, etc. However, the concept of the present invention is not limited thereto, and the peripheral gear part 200 may be formed of various materials.

[0058] The up and down direction is the direction of gravity, Figure 2 As a reference, it can be understood as the z-axis direction.

[0059] The outer gear part 200 may apply a force in a lower direction (−z direction) to the central gear part 100 .

[0060] Specifically, the balancing device 10 may further include: a moving part 400, which can move relative to the central gear part 100 in a state connected to the peripheral gear part 200; and a load adjustment part 510, which can apply a load ( Figure 1 For the convenience of explanation, the moving part 400 is removed for illustration).

[0061] The load adjustment portion 510 may be fixed to the upper side of the support portion 700 , and the moving portion 400 may be moved up and down relative to the support portion 700 via the roller 600 .

[0062] The load adjustment unit 510 is a piston cylinder, and can use hydraulic pressure, air pressure, or spring tension. A force can be applied to the load adjustment unit 510 through the power unit 520.

[0063] That is, when pressure is applied by the power unit 520 , the load adjustment unit 510 may press the balance weight 410 and the moving unit 400 connected thereto downward.

[0064] Thus, the outer gear part 200 connected to the moving part 400 can apply force to the central gear part 100, thereby offsetting the force applied from the elevator car 30 to the elevator drum 20.

[0065] For example, the heavier the elevator car 30 is, the greater the pressure applied from the load adjustment part 510 to the load adjustment part 510 is, or the load of the balancing weight 410 itself may be increased to offset the force applied to the elevator drum 20 .

[0066] The balancing device 10 of this embodiment can be used as a balancing device of an elevator car 30 and various other devices.

[0067] A power control box 524 may be provided on one side of the power unit 520 .

[0068] The power control box 524 may include a sensor capable of detecting the weight applied to the counterweight 410 , and air pressure may be used to counteract the relative weight automatically applied to the counterweight 410 .

[0069] In addition, a control valve 526 can be set on one side of the power unit 520, and the control valve 526 can adjust the hydraulic pressure or air pressure applied from the power unit 520 to the load adjustment unit 510, and the load applied to the balance weight 410 can be automatically adjusted by adjusting the hydraulic pressure or air pressure applied to the load adjustment unit 510.

[0070] Also, the balancing device 10 may include an auxiliary gear 300 meshed with the central gear part 100 .

[0071] The auxiliary gear 300 may be disposed to be spaced apart from the peripheral gear part 200 and meshed with the central gear part 100 .

[0072] For example, the auxiliary gear 300 may include a first auxiliary gear 310 engaged with the first central gear 110 and spaced apart from the first peripheral gear 210 , and a second auxiliary gear 320 engaged with the second central gear 120 and spaced apart from the second peripheral gear 220 .

[0073] The diameters may increase in the order of the central gear part 100 , the peripheral gear part 200 , and the auxiliary gear 300 .

[0074] The first auxiliary gear 310 may be disposed on an upper side of the first peripheral gear 210, and the second auxiliary gear 320 may be disposed on an upper side of the second peripheral gear 220 (see Figure 2 ).

[0075] Furthermore, the balancing system 1 of this embodiment may include a plurality of elevator drums 20 .

[0076] For example, one elevator drum 20 may be disposed on a first drive shaft L1 connected to the first sun gear 110 , and another elevator drum 20 ′ may be disposed on a second drive shaft L2 connected to the second sun gear 120 .

[0077] As required, the second drive shaft L2 of this embodiment can rotate in a clockwise direction or a counterclockwise direction.

[0078] Furthermore, the balancing system 1 of this embodiment may include: a reduction motor 61 for reducing the speed of the first drive shaft L1 ; and a first brake 62 for stopping the first drive shaft L1 , and may include a second brake 64 for stopping the second drive shaft L2 .

[0079] The first brake 62 and the second brake 64 can be automatically operated according to the sensor. For example, the sensor can be provided in at least one of the balancing device 10, the elevator car 30 and the elevator drum 20. When the sensor detects a situation (emergency) in which the operation needs to be stopped, the first brake 62 and the second brake 64 can be operated to stop the first drive shaft L1 and the second drive shaft L2.

[0080] Furthermore, the balancing system 1 may include a wire guide 40 , and the wire guide 40 may be connected to the third driving shaft L3 .

[0081] In this case, the first connecting gear 52 may be provided on the third driving shaft L3 , and the second connecting gear 54 may be provided on the second driving shaft L2 , and the first connecting gear 52 and the second connecting gear 54 may be meshed with each other.

[0082] The connection between the first connecting gear 52 and the second connecting gear 54 may include a gear connection, a chain belt connection, and the like.

[0083] The wire guide device 40 allows the wire wound on the elevator drum 20 to be smoothly wound and unwound.

[0084] A wire rope guide 48 may be provided on one side of the wire guide device 40. In this embodiment, the wire rope guide 48 is provided on the upper side of the wire guide device 40 as an example, but the installation position of the wire rope guide 48 is not limited thereto.

[0085] The wire rope guide 48 is movable in parallel with the third drive axis L3 (along the X-axis direction).

[0086] Since the wire rope guide 48 is provided, as the elevator drum 20' rotates, the metal wire wound thereon can be smoothly wound and unwound.

[0087] Likewise, the first connecting gear 52 may be disposed on the sixth driving shaft L6 , and the second connecting gear 54 may be disposed on the first driving shaft L1 , and the first connecting gear 52 and the second connecting gear 54 may mesh with each other.

[0088] The wire guide device 40 may be provided on the sixth drive shaft L6, and a wire rope guide portion 48 may be provided on one side of the wire guide device 40. As described above, since the wire rope guide portion 48 is provided on one side of the wire guide device 40, the wire wound thereon can be smoothly wound and unwound as the elevator drum 20' rotates.

[0089] Among them, the first driving shaft L1, the second driving shaft L2, the third driving shaft L3, and the sixth driving shaft L6 can be arranged parallel to each other.

[0090] Support components that rotatably support the corresponding drive shafts are formed on both sides of the first drive shaft L1, the second drive shaft L2, the third drive shaft L3, the fourth drive shaft L4, the fifth drive shaft L5, and the sixth drive shaft L6. Similarly, support components that rotatably support the corresponding drive shafts are formed on both sides of the drive shafts described later. Such support components can be understood as known technology.

[0091] Hereinafter, the force applied from the balancing device 10 to the elevator drum 20 will be described in more detail.

[0092] When the moving part 400 is lowered by the balancing weight 410 or the load adjusting part 510 connected to the power part 520 , the peripheral gear part 200 and the auxiliary gear 300 may rotate the central gear part 100 .

[0093] Specifically, the first central gear 110 can rotate in a counterclockwise direction, and the second central gear 120 can rotate in a clockwise direction (refer to Figure 2 ). Thus, the first driving shaft L1 connected to the first sun gear 110 can also rotate in the counterclockwise direction, so that the elevator drum 20 can rotate in the counterclockwise direction.

[0094] Also, the outer gear part 200 and the auxiliary gear 300 may press the central gear part 100 downward, thereby maintaining the force applied by the elevator car 30 .

[0095] Also, a first buffer device 910 may be provided at the lower end of the moving part 400. The first buffer device 910 may prevent the moving part 400 from colliding with the ground.

[0096] The moving part 400 may be made of metal so that a load may be applied to the peripheral gear part 200 and the auxiliary gear 300 .

[0097] Furthermore, the balancing system 1 may further include an auxiliary balancing device 80 that works in a linked manner with the elevator drum 20. The auxiliary balancing device 80 may be selectively formed.

[0098] Specifically, the balancing system 1 may further include: a power connection portion 70 connected to the first driving shaft L1 ; and an auxiliary balancing device 80 capable of applying force to the first driving shaft L1 through the power connection portion 70 .

[0099] There may be a plurality of power connection parts 70 and auxiliary balancing devices 80 .

[0100] Reference Figure 3 , the auxiliary balancing device 80 is described in more detail as follows.

[0101] The auxiliary balancing device 80 may include: a plurality of connecting ropes connected to the power connection part 70; and a balancing pole 810, the connecting ropes are fixed on one side, and a movable weight 819 is formed on the other side.

[0102] Also, the connection rope may be connected to the balance pole 810 via a first roller 832 and a second roller 834 disposed on the upper side of the balance pole 810 .

[0103] In this case, the force applied from the balance pole 810 to the power connection part 70 may be changed according to the position of the moving weight 819 .

[0104] As the first driving shaft L1 rotates, the connecting rope can be wound or unwound, thereby the balancing pole 810 can move up and down.

[0105] The first roller 832 and the second roller 834 may be fixed to the fixing portion and rotate to move the plurality of connection ropes.

[0106] The fixing part may include: an upper fixing part 822 provided with a first roller 832 and a second roller 834 ; a side fixing part 824 for guiding the balance bar 810 to move up and down; and a lower fixing part 826 provided with a buffer device 920 .

[0107] Furthermore, a buffer device 920 may be provided at the lower side of the balance pole 810 . The buffer device 920 may prevent the balance pole 810 from contacting the lower fixing portion 826 .

[0108] Among them, supporting components for supporting the lower fixing portion 826 can be formed on both side surfaces of the lower fixing portion 826, and such supporting components can be understood as well-known technologies.

[0109] The auxiliary balancing device 80 may apply force to the power connection portion 70 , and the power connection portion 70 may apply force to rotate the elevator drum 20 through the first driving shaft L1 .

[0110] Also, the force applied from the auxiliary balancing device 80 to the elevator drum 20 may vary according to the location at which the moving counterweight 819 is disposed on the balancing pole 810 .

[0111] For example, as the distance between the first fixing portion 812 provided on the balancing pole 810 and the moving counterweight 819 increases (the longer X1 is), the greater the force applied by the auxiliary balancing device 80 to the elevator drum 20. Similarly, as the distance between the first fixing portion 812 provided on the balancing pole 810 and the moving counterweight 819 is closer, the force applied by the auxiliary balancing device 80 to the elevator drum 20 may be smaller.

[0112] Also, the first fixing portion 812 may be movable in the balance bar 810, in which case, as the distance between the second fixing portion 814 and the first fixing portion 812 changes, the force applied to the elevator drum 20 may change.

[0113] Furthermore, the force applied to the power connection part 70 may be changed according to a distance X1 between the first fixing part 812 of the balance pole 810 and the movable weight 819 and a distance X2 between the first fixing part 812 of the balance pole 810 and the second fixing part 814 .

[0114] The first fixing portion 812 can be moved, so that the ratio of the distance X1 between the first fixing portion 812 and the movable weight 819 and the distance X2 between the first fixing portion 812 and the second fixing portion 814 can be adjusted.

[0115] The movable counterweight 819 is adjusted according to the weight of the elevator car 30, whereby the auxiliary balancing device 80 can play the role of an existing balancing counterweight.

[0116] A third roller 852 may be formed on the side of the balance bar 810 of the auxiliary balance device 80, and the third roller 852 may move along the side fixing portion 824. Thus, the balance bar 810 may move up and down (in the z-axis direction) along the side fixing portion 824.

[0117] Furthermore, the movable weight 819 provided on the balance pole 810 can move left and right (in the y-axis direction).

[0118] Furthermore, the weight (eg, the weight of the elevator car 30, the weight borne by the first connecting rope R1, the second connecting rope R2, and the third connecting rope R3, etc.) can be detected by sensors, and the movable counterweight 819 can automatically move left and right.

[0119] Furthermore, a fourth roller 854 may be provided on the balance pole 810 separated from the moving counterweight 819 to one side, and a fourth roller 854 may be provided on the balance pole 810 separated from the moving counterweight 819 to the other side, and the moving counterweight moving rope 862 may connect the moving counterweight 819 and the fourth roller 854 provided on both sides of the moving counterweight 819.

[0120] The control box 864 may rotate at least one of the plurality of fourth rollers 854 so that the moving weight 819 may move left and right on the balance pole 810 .

[0121] Also, the auxiliary balancing device 80 may be provided with a control box 864 that is fixed to one side of the side fixing portion 824 and controls the rotation of the fourth roller 854 .

[0122] Furthermore, the first fixing portion 812 disposed on the balance pole 810 may also be moved from the balance pole 810 to another position. Thus, the distance between X1 and X2 may be adjusted.

[0123] Furthermore, the auxiliary balancing device 80 may include a plurality of connecting ropes connected to the power connecting portion 70. The connecting ropes may be drums or chains.

[0124] Specifically, the connecting rope may include: a first connecting rope R1, connecting the balancing pole 810 and the first drum 734 of the power connection part 70; a second connecting rope R2, connecting the balancing pole 810 and the third drum 714 of the power connection part 70; and a third connecting rope R3, connecting the balancing pole 810 and the second drum 724 of the power connection part 70.

[0125] The third connection rope R3 may be connected to the second fixing portion 814 , the second connection rope R2 may be connected to the third fixing portion 816 , and the first connection rope R1 may be connected to the first fixing portion 812 .

[0126] The second fixing portion 814 and the third fixing portion 816 may be disposed facing each other in the balancing pole 810 , and the first fixing portion 812 may be disposed between the second fixing portion 814 and the movable weight 819 .

[0127] The power connection part 70 may include: a second reel 724 connected to the third connection rope R3; a third reel 714 connected to the second connection rope R2; a first reel 734 connected to the first connection rope R1; a second gear 722 rotating integrally with the second reel 724; a third gear 712 rotating integrally with the third reel 714; and a first gear 732 meshing with the second gear 722.

[0128] The third gear 712 may be fixed to the first driving shaft L1 , and the third reel 714 may be fixed to the first driving shaft L1 .

[0129] That is, the auxiliary balancing device 80 can be used to rotate the first drive shaft L1, and the elevator drum 20 connected thereto can be rotated.

[0130] However, the concept of the present invention is not limited to this, and a power generation device or the like may be provided on the first drive shaft L1 to generate power.

[0131] Above Figure 4 It can be understood that the pressing force and the pulling force are composed of one force, wherein the balance bar 810 maintains balance and generates a larger force.

[0132] Furthermore, a sensor may be attached to the elevator drum 20, and the rotation speed of the elevator drum 20 may be transmitted to the reduction motor to maintain a predetermined rotation speed.

[0133] When the number of metal wires wound around the elevator drum 20 is large, the speed of the elevator car 30 increases, and when the number of metal wires wound around the elevator drum 20 is small, the speed of the elevator car 30 decreases (for example, when the elevator drum 20 becomes larger or smaller).

[0134] Furthermore, a plurality of elevator drums 20 may be provided and may be connected in series or in parallel.

[0135] The wire guide device 40 can rotate together with the elevator drum 20 set on the first drive shaft L1 or the second drive shaft L2, and can be linked by gears, chains, etc. The wire guide device 40 allows the elevator drum 20 to be smoothly wound and unwound.

[0136] A fifth roller 842 , a sixth roller 844 , and a seventh roller 846 may be disposed on the lower fixing portion 826 .

[0137] The first connection rope R1 may be connected to the power connection part 70 via the fifth roller 842 , the second connection rope R2 may be connected to the power connection part 70 via the sixth roller 844 , and the third connection rope R3 may be connected to the power connection part 70 via the seventh roller 846 .

[0138] Hereinafter, the force applied to the elevator drum 20 by the auxiliary balancing device 80 will be described in more detail.

[0139] By moving the counterweight 819 , the balance pole 810 applies force downward, and a plurality of connection ropes fixed on opposite sides of the moving counterweight 819 can cause the first drum 734 , the second drum 724 , and the third drum 714 of the power connection part 70 to rotate.

[0140] Thus, the first gear 732 rotating in a manner integrally formed with the first reel 734 can rotate, the second gear 722 rotating in a manner integrally formed with the second reel 724 can rotate, and the third gear 712 rotating in a manner integrally formed with the third reel 714 can rotate.

[0141] That is, the first gear 732 and the second gear 722 can be rotated in the counterclockwise direction by the first connecting rope R1 and the third connecting rope R3, and the third gear 712 can be rotated in the clockwise direction by the second connecting rope R2. However, the rotation direction can be changed according to the winding direction of the first connecting rope R1, the second connecting rope R2, and the third connecting rope R3, so that the first gear 732 and the second gear 722 can be rotated in the clockwise direction, and the third gear 712 can be rotated in the counterclockwise direction.

[0142] In the present embodiment, the first connecting rope R1, the second connecting rope R2, and the third connecting rope R3 are described as one. However, the first connecting rope R1, the second connecting rope R2, and the third connecting rope R3 may be two or more.

[0143] Furthermore, a plurality of power connection parts 70 and auxiliary balancing devices 80 may be provided.

[0144] Figure 5 FIG. 1 is a diagram showing an embodiment of shortening the rope winding distance of the balance shaft. Figure 5 It can be understood as yet another embodiment of the power connection part.

[0145] pass Figure 5 The power connection part 70' shown can increase the rotation speed of the first drive shaft L1 connected to the elevator drum 20. Therefore, even if the first to third connecting ropes R1 to R3 move a short distance, the rotation speed of the elevator drum 20 can be increased.

[0146] Specifically, the power connection part 70' may include: a third gear 712, connected to the seventh drive shaft L7; a second gear 722 and a first gear 732, arranged on both sides of the third gear 712; a fourth gear 912, connected to the seventh drive shaft L7; an eighth drive shaft L8, arranged in parallel with the seventh drive shaft L7; a fifth gear 914, connected to the eighth drive shaft L8, with a diameter smaller than the diameter of the fourth gear 912; a sixth gear 916, connected to the eighth drive shaft L8, with a diameter larger than the diameter of the fifth gear 914; a first drive shaft L1, arranged in parallel with the eighth drive shaft L8; and a seventh gear 918, arranged on the first drive shaft L1, meshing with the sixth gear 916, with a diameter smaller than the diameter of the sixth gear 916.

[0147] In this case, the elevator drum 20 may be connected to the first drive shaft L1.

[0148] That is, the rotation speed of the first drive shaft L1 connected to the elevator drum 20 can be controlled compared with the seventh drive shaft L7 connected to the third gear 712 by the gear ratio of the fourth gear 912, the fifth gear 914, the sixth gear 916 and the seventh gear 918.

[0149] Figure 6 FIG. 1 is a diagram showing a balancing system 1 ′ according to yet another embodiment of the present invention.

[0150] Compared with the above-mentioned embodiment, the main difference of this embodiment is that an elevator drum 20" is formed, so the main difference will be described and the above description and figure marks will be cited for the same matters.

[0151] The power connection part 70 and the auxiliary balancing device 80 of the above embodiment are respectively the same as the power connection part 70 ′ and the auxiliary balancing device 80 ′ of the present embodiment, and the description thereof will be replaced by the above description.

[0152] A balancing system 1' according to another embodiment of the present invention may include: an elevator drum 20' connected to an elevator car 30'; a pair of central gear parts 100' connected to a first drive shaft L1' of the elevator drum 20' and rotating in contact with each other; and a pair of peripheral gear parts 200' respectively contacting and rotating with the pair of central gear parts 100'. When the elevator drum 20' is subjected to a force in a first direction due to the elevator car 30', the central gear part 100' may apply a force to the elevator drum 20' in a direction opposite to the first direction with the help of the force applied by the peripheral gear part 200'.

[0153] In the above embodiment, the first driving shaft L1 is connected to the first sun gear 110 , and in this embodiment, the first driving shaft L1 ′ may be connected to the second sun gear 120 ′.

[0154] Furthermore, in the above embodiment, the third gear 712 and the first sun gear 110 are connected to the first driving shaft L1 , but in this embodiment, the third gear 712 ′ and the second sun gear 120 ′ are connected to the first driving shaft L1 ′.

[0155] Figure 7 FIG. 1 is a diagram showing a balancing system 1 ′ according to yet another embodiment of the present invention.

[0156] and Figures 1 to 5 Compared with the above-mentioned embodiment, the main difference of this embodiment is that an elevator drum 20"' is formed. The main difference is explained and the above-mentioned description and figure marks are quoted for the same matters.

[0157] The power connection portion 70 and the auxiliary balancing device 80 of the above embodiment are respectively the same as the power connection portion 70 ″ and the auxiliary balancing device 80 ″ of the present embodiment, and the description thereof will be replaced by the above description.

[0158] A balancing system 1" according to another embodiment of the present invention may include: an elevator drum 20"' connected to an elevator car 30"; a pair of central gear portions 100" connected to a first drive shaft L1" of the elevator drum 20" and rotating in contact with each other; and a pair of peripheral gear portions 200" respectively contacting and rotating with the pair of central gear portions 100" above. When the peripheral gear portions 200" are subjected to a force in a first direction due to the elevator car 30", the central gear portion 100" may apply a force to the elevator drum 20"' in a direction opposite to the first direction with the help of the force applied by the peripheral gear portions 200".

[0159] exist Figures 1 to 5 In the embodiment described in , the second sun gear 120 is connected to the second drive shaft L2 , but in this embodiment, the second drive shaft L2 is excluded.

[0160] Figure 6 and Figure 7 A diagram showing an easy way to choose the axis rotation. The rotation ratio is not limited and can be decreased or increased.

[0161] Figure 8 A diagram showing a balancing device according to another embodiment of the present invention is shown in FIG. Fig. 9 For conceptual illustration Figure 8 A side view of a first peripheral gear 210'' indirectly connected to a first central gear 110'' and a second peripheral gear 220'' indirectly connected to a second central gear 120'' in a balancing device.

[0162] and Figures 1 to 5 Compared with the above embodiments, Figure 8 and Fig. 9The main difference is that the central gear part and the peripheral gear part are compound-arranged, and the type of the gear can be a flat gear or a sprocket gear. The main difference is explained and the above description and figure marks are cited for the same matters.

[0163] Reference Figure 8 and Fig. 9 A balancing device according to another embodiment of the present invention may include: a plurality of first central gears 110"', which are separated from each other and arranged in parallel; a plurality of second central gears 120"', which are separated from each other and arranged in parallel; a first peripheral gear 210"' directly connected to a first central gear 110"' and a second peripheral gear 220"' directly connected to a second central gear 120"'; and a first peripheral gear 210"' indirectly connected to another first central gear 110"' and a second peripheral gear 220"' indirectly connected to another second central gear 120"'.

[0164] For example, the first peripheral gear 210"' directly connected to a first center gear 110"' and the second peripheral gear 220"' directly connected to a second center gear 120"' can be directly meshed as sprockets, and the first peripheral gear 210"' indirectly connected to another first center gear 110"' and the second peripheral gear 220"' indirectly connected to another second center gear 120"' can be indirectly meshed as sprockets.

[0165] A first peripheral gear 210'' directly connected to a first central gear 110'' and a second peripheral gear 220'' directly connected to a second central gear 120'' are connected to the first peripheral gear 210''. Figures 1 to 5 The above description is the same as that in the above description, and the description thereof is replaced by the above description.

[0166] Below, refer to Fig. 9 , the first peripheral gear 210''' indirectly connected to the one first central gear 110''' and the second peripheral gear 220'''' indirectly connected to the other second central gear 120''' are described in more detail.

[0167] The first central gear 110 ′″ and the first peripheral gear 210 ′″ may be indirectly connected.

[0168] For example, the first central gear 110 ′″ and the first peripheral gear 210 ′″ may be spaced apart from each other, and the first central gear 110 ′″ and the first peripheral gear 210 ′″ may be connected by the indirect connection unit 1111 .

[0169] The indirect connection unit 1111 may be a chain or a rope. However, the indirect connection unit 1111 only needs to connect the first central gear 110'' and the first peripheral gear 210'' to transmit the rotational force.

[0170] More specifically, a pair of first peripheral gears 210"' separated from the first central gear 110"' can be set on one side of the first central gear 110"', and the pair of first peripheral gears 210"' are connected by an indirect connection unit 1111 (for example, a chain), and the indirect connection unit 1111 can contact the first central gear 110"'.

[0171] Similarly, a pair of second peripheral gears 220"' separated from the second central gear 120"' can be formed on one side of the second central gear 120"', and the pair of second peripheral gears 220"' can be connected by an indirect connection unit 1111 (for example, a chain), and the indirect connection unit 1111 can be in contact with the second central gear 120"'.

[0172] Fig.10 FIG. 1 is a diagram briefly showing a balancing system 1 ″ according to another embodiment of the present invention.

[0173] Fig.11 For conceptual illustration, see from the side Fig.10 FIG. 1 is a diagram showing the state of the balancing device 10 ″.

[0174] and Figures 1 to 5 Compared with the above-mentioned embodiment, the main difference of this embodiment is that the first central gear 110 and the first peripheral gear 210 are arranged as one. The main difference is explained and the above-mentioned description and figure marks are cited for the same matters.

[0175] In the above embodiment, the present invention is driven by a pair of central gear parts 100 and a pair of peripheral gear parts 200, but the concept of the present invention is not limited thereto. The present invention can also be driven by a first central gear 110" and a second central gear 120".

[0176] That is, in Figure 10 to Figure 11 The present invention may include: an elevator drum 20, connected to an elevator car 30; a central gear unit 100, connected to a first drive shaft L1 of the elevator drum 20, including a first central gear 110; and a peripheral gear unit 200, including a first peripheral gear 210 that contacts and rotates with the first central gear 110. When the elevator drum 20 is subjected to a force in a first direction due to the elevator car 30, the central gear unit 100 may apply a force to the elevator drum 20 in a direction opposite to the first direction with the help of the force applied by the peripheral gear unit 200.

[0177] Fig.12 To show Figure 5 FIG. 1 is a diagram of a modified example of .

[0178] Reference Fig.12, the auxiliary balancing device 80 and the corresponding first reel 734"' to the third reel 714"' can be provided in plurality. The first connecting cylinder 991 and the second connecting cylinder 992 can be connected by one of a metal wire, a chain, and a belt, and the third connecting cylinder 993 and the fourth connecting cylinder 994 can also be connected by one of a metal wire, a chain, and a belt.

[0179] Specifically, refer to Fig.12 The eleventh driving shaft L11 can be connected to multiple reel groups and the first connecting tube 991.

[0180] The reel group may include a first reel 734''', a second reel 724''' and a third reel 714''' which are arranged in parallel.

[0181] For example, the eleventh drive shaft L11 may include a reel group connected to an auxiliary balancing device 80, another reel group connected to yet another auxiliary balancing device 80, another reel group connected to yet another auxiliary balancing device 80, and yet another reel group connected to yet another auxiliary balancing device 80, and a first connecting shaft 991 may be set between the reel groups.

[0182] The reel group includes a first reel 734"', a second reel 724"' and a third reel 714"'. Each first reel 734"' can be connected to a first connecting rope R1 extending from the auxiliary balancing device 80, the third reel 714"' can be connected to a second connecting rope R2 extending from the auxiliary balancing device 80, and the second reel 724"' can be connected to a third connecting rope R3 extending from the auxiliary balancing device 80.

[0183] The second connecting cylinder 992 and the third connecting cylinder 993 may be disposed in parallel on the twelfth driving shaft L12.

[0184] The first connecting cylinder 991 provided on the eleventh driving shaft L11 and the second connecting cylinder 992 provided on the twelfth driving shaft L12 may be connected by one of a wire, a chain, and a belt, and reference numeral 995 conceptually shows one of the wire, the chain, and the belt.

[0185] The third connecting tube 993 connected to the elevator car 30 may be provided on the thirteenth driving shaft L13.

[0186] The third connecting tube 993 provided on the twelfth drive shaft L12 and the fourth connecting tube 994 provided on the thirteenth drive shaft L13 may also be connected by one of a metal wire, a chain, and a belt, and reference numeral 996 conceptually shows one of the metal wire, the chain, and the belt.

[0187] Among them, the eleventh driving shaft L11, the twelfth driving shaft L12 and the thirteenth driving shaft L13 can be arranged in parallel.

[0188] Furthermore, the eleventh drive shaft L11 may correspond to Figure 5 The seventh drive shaft L7 and the twelfth drive shaft L12 may correspond to Figure 5 The eighth drive shaft L8 and the thirteenth drive shaft L13 may correspond to Figure 5 The ninth drive shaft L9.

[0189] Furthermore, guide rollers for guiding the first connecting rope R1, the second connecting rope R2, and the third connecting rope R3 may be provided in the auxiliary balancing device 80, and the first connecting rope R1 to the third connecting rope R3 may be easily connected to the first reel 734''' to the third reel 714''' through the guide rollers.

[0190] Similarly, in order to allow the connecting rope to be easily wound around the first drum 734'' or unwound from the third drum 714'', a wire guide portion and a winding portion may be provided respectively. The guide roller, the wire guide portion and the winding portion may be understood as known techniques.

[0191] Fig.13 To show Fig.12 FIG. 7 is a diagram of an embodiment in which the first drum 734'', the second drum 724'' and the third drum 714'' are respectively connected to a plurality of first connecting ropes R1, a third connecting rope R3 and a second connecting rope R2.

[0192] Reference Fig.13 , multiple (for example, 3) first connecting ropes R1 can be led out from the auxiliary balancing device 80, and the multiple first connecting ropes R1 can be formed into a first composite rope R41, and then the first composite rope R41 can be connected to the first drum 734''.

[0193] Furthermore, a plurality of (eg, three) second connecting ropes R2 may be drawn out from the auxiliary balancing device 80 , and the plurality of second connecting ropes R2 may be formed into a second composite rope R42 , and then the first composite rope R41 may be connected to the first drum 734 ′″.

[0194] Likewise, a plurality of (eg, three) third connecting ropes R3 may be drawn out from the auxiliary balancing device 80, and the plurality of three connecting ropes R3 may be formed into a third composite rope R43, and then the third composite rope R43 may be connected to the first drum 734''.

[0195] As described above, the first connecting rope R1 to the third connecting rope R3 are formed in plurality respectively, and then the plurality of first connecting ropes R1 are formed into a first composite rope R41, the plurality of second connecting ropes R2 are formed into a second composite rope R42, and the plurality of third connecting ropes R3 are formed into a third composite rope R43, thereby, a greater force can be applied from the auxiliary balancing device 80 to the drive shaft more stably.

[0196] As a specific embodiment, the balancing device 10 and the balancing system 1 including the balancing device 10 of the embodiment of the present invention are described above, but this is only for illustration, and the present invention is not limited thereto, but should be interpreted as having the broadest scope based on the basic idea disclosed in this specification. A person skilled in the art of the present invention can combine and replace the disclosed embodiments to implement unspecified actual forms, but this does not exceed the scope of protection claimed by the invention of the present invention. In addition, a person skilled in the art of the present invention can easily change or deform the disclosed embodiments based on this specification, and such changes or deformations should also fall within the scope of protection claimed by the invention of the present invention.

[0197] Description of Reference Numerals

[0198] 1: Balance system

[0199] 1': Balance system

[0200] 1”: Balanced system

[0201] 10: Balancing device

[0202] 10”: Balancing device

[0203] 10”’: Balancing device

[0204] 10””: Balancing device

[0205] 100: Central gear

[0206] 100': Central gear

[0207] 100”: Central gear

[0208] 100"': Central gear

[0209] 1000: Bracket

[0210] 110: First central gear

[0211] 110': First central gear

[0212] 110”: First center gear

[0213] 110"': First central gear

[0214] 1111: Indirect connection unit

[0215] 120: Second sun gear

[0216] 120': Second sun gear

[0217] 120”: Second sun gear

[0218] 120"': Second sun gear

[0219] 20: Elevator drum

[0220] 20': Elevator drum

[0221] 20”: Elevator drum

[0222] 20”': Elevator drum

[0223] 200: Peripheral gear part

[0224] 200': Peripheral gear part

[0225] 200”: Peripheral gear part

[0226] 200"': Peripheral gear part

[0227] 210: First peripheral gear

[0228] 210”: First peripheral gear

[0229] 210"': First peripheral gear

[0230] 220: Second peripheral gear

[0231] 220”: Second peripheral gear

[0232] 220"': Second peripheral gear

[0233] 30: Elevator car

[0234] 30': Elevator car

[0235] 30”: Elevator car

[0236] 300: Auxiliary gear

[0237] 310: First auxiliary gear

[0238] 320: Second auxiliary gear

[0239] 40: Metal wire guide device

[0240] 400: Mobile Department

[0241] 410: Balancing weight

[0242] 48: Wire rope guide

[0243] 510: Load regulation unit

[0244] 52: First connecting gear

[0245] 520: Power Department

[0246] 524: Power control box

[0247] 526: Control valve

[0248] 54: Second connecting gear

[0249] 600: Roller

[0250] 61: Reduction motor

[0251] 62: First brake

[0252] 64: Second brake

[0253] 70: Power connection

[0254] 70': Power connection

[0255] 70”: Power connection

[0256] 700: Support

[0257] 712: Third Gear

[0258] 712': Third gear

[0259] 714: The third reel

[0260] 722: Second Gear

[0261] 724: Second Reel

[0262] 732: First Gear

[0263] 734: First Reel

[0264] 80: Auxiliary balancing device

[0265] 80': Auxiliary balancing device

[0266] 80”: Auxiliary balancing device

[0267] 810: Balance bar

[0268] 812: First fixed part

[0269] 814: Second fixing part

[0270] 816: Third fixed part

[0271] 819: Moving the weight

[0272] 822: Upper fixed part

[0273] 824: Side fixing part

[0274] 826: Lower fixed part

[0275] 832: First Roller

[0276] 834: Second Roller

[0277] 842: Fifth Roller

[0278] 844: Sixth Roll

[0279] 846: The Seventh Roll

[0280] 852: Third Roller

[0281] 854: The fourth roller

[0282] 862: Moving weight and moving rope

[0283] 864: Control box

[0284] 910: First buffer device

[0285] 912: Fourth Gear

[0286] 914: Fifth Gear

[0287] 916: Sixth Gear

[0288] 918: Seventh Gear

[0289] 920: Buffer

[0290] L1: First drive shaft

[0291] L1': First drive shaft

[0292] L1”: First drive shaft

[0293] L1”’: First drive shaft

[0294] L2: Second drive shaft

[0295] L3: The third drive shaft

[0296] L6: Sixth drive shaft

[0297] L7: Seventh drive shaft

[0298] L8: Eighth drive shaft

[0299] R1: First connecting rope

[0300] R2: Second connecting rope

[0301] R3: The third connecting rope

[0302] R41: The first composite rope

[0303] R42: Second composite rope

[0304] R43: The third composite rope

[0305] 734”’: First reel

[0306] 724”’: Second reel

[0307] 714”’: The third reel

[0308] 991: First connecting tube

[0309] 992: Second connecting tube

[0310] 993: Third connecting tube

[0311] 994: Fourth connecting tube

[0312] L11: Eleventh drive shaft

[0313] L12: 12th drive shaft

[0314] L13: 13th drive shaft

[0315] Industrial Applicability

[0316] The balancing device of the present invention and the balancing system including the same have industrial applicability.

Claims

1. A balancing device, characterized in that: include: an elevator drum connected to the elevator car; A central gear unit connected to the first drive shaft of the elevator drum, including a first central gear; The peripheral gear portion includes a first peripheral gear that contacts and rotates with the first central gear; a moving part, which is movable relative to the central gear part while being connected to the peripheral gear part; A balancing weight is arranged on one side of the moving part; and A load adjustment unit is capable of applying a force to the moving unit. When the elevator drum is subjected to a force in a first direction by the elevator car, the central gear portion applies a force to the elevator drum in a direction opposite to the first direction by the force applied by the outer gear portion.

2. The balancing device according to claim 1, characterized in that: The sun gear portion includes a first sun gear and a second sun gear that rotate in contact with each other. The first sun gear is connected to the first drive shaft. The peripheral gear unit includes: A first peripheral gear meshing with the first central gear; and The second peripheral gear meshes with the second central gear. The first central gear and the second central gear are fixed in the direction of gravity, and the first outer gear and the second outer gear are movable in the direction of gravity.

3. A balancing system, characterized in that: include: The balancing device according to claim 1; A power connection portion connected to the first drive shaft; and The auxiliary balancing device can apply force to the first driving shaft through the power connecting portion.

4. The balancing system according to claim 3, characterized in that: The auxiliary balancing device comprises: A plurality of connecting ropes connected to the power connecting part; and The balance pole fixes the above connecting rope on one side and sets a movable counterweight on the other side. The force applied from the balance bar to the power connection portion varies depending on the position of the moving weight.

5. The balancing system according to claim 4, characterized in that: The plurality of connection ropes are connected to the balance pole via a roller disposed on the upper side of the balance pole and a roller disposed on the lower side.

6. The balancing system according to claim 3, characterized in that: The auxiliary balancing device and the power connection part are connected by a first connecting rope, a second connecting rope and a third connecting rope. The first connecting rope applies a force to rotate the first gear of the power connecting part. The second connecting rope applies a force to rotate the third gear of the power connecting part. The third connecting rope applies a force to rotate the second gear of the power connecting part. When the third gear rotates in the clockwise direction, the second gear and the first gear rotate in the counterclockwise direction. When a force is generated by the balance bar to raise the third connecting rope, the third connecting rope causes the second gear to rotate counterclockwise. As the second gear rotates counterclockwise, the third gear will rotate clockwise and pull the second connecting rope, while causing the first drive shaft to rotate to offset the force applied by the elevator car.

7. The balancing system according to claim 3, characterized in that: The central gear unit includes a first central gear and a second central gear that rotate in contact with each other, a plurality of first central gears that are spaced apart from each other and arranged in parallel, and a plurality of second central gears that are spaced apart from each other and arranged in parallel. The above-mentioned balancing system also includes: A first peripheral gear directly connected to a first central gear and a second peripheral gear directly connected to a second central gear; and A first peripheral gear is indirectly connected to another first central gear and a second peripheral gear is indirectly connected to another second central gear.

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