A spraying structure for wall latex paint and its spraying robot

Abstract

The present invention discloses a spraying structure for wall latex paint and its spraying robot, comprising: a workbench, which is horizontally arranged; a spray rod, including a rubber tube and a pair of steel tubes, nozzles are arranged on both the rubber tube and the steel tubes, and a feeding tube is connected to the middle position of the rubber tube; a support rod, which is vertically arranged on the workbench and its upper end is fixed to the middle position of the rubber tube; a movable rod, which is vertically arranged on the workbench and is distributed on both sides of the support rod, the upper end of the movable rod is fixed to the middle position of the steel tube, and the lower end is provided with an arc-shaped slider, and an arc-shaped chute for the slider to slide is arranged on the workbench; a driving mechanism, which is used to control the synchronous sliding of a pair of sliders. By setting a spray rod with adjustable angle, the present invention can adjust the spray rod into a straight shape to realize the spraying operation on a large-area wall, and can also adjust the spray rod into a right angle shape inward or outward to adapt to the inner corner or outer corner position, improving the construction quality.

Description

Technical Field

[0001] The present invention relates to the field of spraying devices, and particularly to a spraying structure for wall latex paint and a spraying robot thereof. Background Art

[0002] Latex paint spraying is a common wall decoration method, applicable to large-area painting operations such as interior walls and ceilings. Compared with traditional brushing or rolling, spraying can provide a more uniform and smooth surface effect, and has obvious advantages in construction speed.

[0003] During the traditional latex paint spraying process, usually workers hold the spray gun to carry out spraying. The spraying area each time is limited. When using a long-strip spray rod for spraying, although the spraying area each time is relatively large, when operating at the internal and external corner positions, it is impossible to ensure that the paint film thickness at the internal and external corner positions is consistent, and it is very easy to have over-spraying or missed-spraying phenomena, affecting the construction quality, and thus improvement is needed. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a spraying structure for wall latex paint, which has the effect of improving construction quality.

[0005] The above technical purpose of the present invention is achieved through the following technical solutions: A spraying structure for wall latex paint, comprising:

[0006] A workbench, which is horizontally arranged;

[0007] A spray rod, including a rubber tube and a pair of steel tubes. The pair of steel tubes are arranged at both ends of the rubber tube. Nozzles are arranged on both the rubber tube and the steel tubes. A feed pipe is connected to the middle position of the rubber tube;

[0008] A support rod, which is vertically arranged on the workbench and the upper end is fixed to the middle position of the rubber tube;

[0009] A movable rod, which is vertically arranged on the workbench and is distributed on both sides of the support rod. The upper end of the movable rod is fixed to the middle position of the steel tube, and the lower end is provided with an arc-shaped slider. An arc-shaped chute for the slider to slide is arranged on the workbench;

[0010] A driving mechanism, which is used to control the synchronous sliding of the pair of sliders.

[0011] In a preferred embodiment, the present invention can be further configured as follows: The driving mechanism includes a shaft rod, a driving rod, a gear, a rack, and a locking rod. The shaft rod is vertically arranged on the workbench and distributed on both sides of the support rod. The driving rod is rotatably connected to the shaft rod and fixed to the inner sidewall of the slider. The gear is arranged at the end of the driving rod. The rack is horizontally slidably connected to the workbench and meshes with the gear. The locking rod vertically penetrates the rack, and a row of locking holes for inserting the locking rod is arranged on the workbench.

[0012] In a preferred embodiment, the present invention can be further configured as follows: A screw rod is horizontally and rotatably connected inside the steel pipe. A partition plate is threadedly connected to the screw rod, and the partition plate is horizontally slidably connected to the steel pipe.

[0013] Another object of the present invention is to provide a spraying robot for wall latex paint, which has the effect of improving the construction quality.

[0014] The above technical object of the present invention is achieved through the following technical solutions: A spraying structure spraying robot for wall latex paint includes:

[0015] A traveling trolley for traveling on the ground;

[0016] A robotic arm is arranged on the traveling trolley and is used for installing and fixing the workbench;

[0017] A protective box is arranged in a hollow manner on the traveling trolley;

[0018] A batching box is arranged inside the protective box and includes a finished product box and a mixing box. The lower end of the finished product box is communicated with the injection pipe. The mixing box is arranged above the finished product box and is internally provided with a stirring paddle. The lower end of the mixing box is provided with a discharge port, and a switch plate is horizontally slidably connected at the position of the discharge port;

[0019] A slurry box is arranged above one end of the mixing box and is communicated with the mixing box;

[0020] A water tank is arranged above the other end of the mixing box and is communicated with the mixing box.

[0021] In a preferred embodiment, the present invention can be further configured as follows: The slurry box includes a slurry hopper, a connecting pipe, a discharge pipe, and a rotating shaft. The slurry hopper is vertically arranged. The connecting pipe is horizontally communicated and arranged below the slurry hopper. The discharge pipe is communicated with the connecting pipe and the mixing box. The rotating shaft is horizontally and rotatably connected inside the connecting pipe, and a material groove for communicating the slurry hopper and the discharge pipe is arranged on the rotating shaft.

[0022] In a preferred embodiment, the present invention can be further configured as follows: a reamer is horizontally and rotatably connected in the slurry hopper, and a pulley set is arranged between the rotating shaft and the reamer for mutual cooperation.

[0023] In a preferred embodiment, the present invention can be further configured as follows: the water tank includes a water bucket, a water outlet pipe and a rotary valve. The water bucket is arranged vertically, the water outlet pipe is vertically communicated with the water bucket and the mixing tank, and the rotary valve is arranged on the water outlet pipe.

[0024] In a preferred embodiment, the present invention can be further configured as follows: a first ratchet and a first ratchet ring are arranged at the end of the rotary valve. The first ratchet ring is rotatably connected to the outside of the first ratchet, and a first sprocket set is arranged between the first ratchet ring and the rotating shaft for mutual cooperation.

[0025] In a preferred embodiment, the present invention can be further configured as follows: a second ratchet and a second ratchet ring are arranged at the end of the rotary valve. The directions of the second ratchet and the second ratchet ring are opposite to those of the first ratchet and the first ratchet ring. The second ratchet ring is rotatably connected to the outside of the second ratchet. A motor is arranged on the outer wall of the water bucket, and a second sprocket set is arranged between the second ratchet ring and the motor for mutual cooperation.

[0026] In summary, the present invention has the following beneficial effects:

[0027] 1. By providing a spray bar with adjustable angle, the spray bar can be adjusted to a straight shape to achieve spraying operations on large-area walls, improving construction efficiency. It can also be adjusted to a right-angled shape inward or outward to adapt to the positions of inside corners or outside corners, ensuring consistent paint thickness at the inside and outside corners, avoiding overspray or missed spray phenomena, and improving construction quality.

[0028] 2. By providing a batching tank that can continuously prepare latex paint, continuous preparation and supply of latex paint are achieved, meeting the spraying requirements, eliminating the need to stop the machine for latex paint replenishment, and realizing the preparation of latex paint as needed, thereby reducing waste of latex paint. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of Embodiment 1;

[0030] Figure 2 is a schematic diagram of the bent state of the spray bar in Embodiment 1;

[0031] Figure 3 is a schematic internal structure diagram of the steel pipe in Embodiment 1;

[0032] Figure 4 is a schematic structural diagram of Embodiment 2;

[0033] Figure 5It is a schematic structural diagram of the batching box in Embodiment 2;

[0034] Figure 6 It is a schematic internal structure diagram of the batching box in Embodiment 2;

[0035] Figure 7 It is a schematic diagram of the connection relationship between the slurry hopper and the water bucket in Embodiment 2.

[0036] Reference numerals: 01, workbench; 02, spray bar; 021, rubber tube; 022, steel pipe; 023, nozzle; 024, injection pipe; 025, screw; 026, partition; 03, support rod; 04, movable rod; 041, slider; 042, chute; 05, drive mechanism; 051, shaft rod; 052, drive rod; 053, gear; 054, rack; 055, locking rod; 056, locking hole; 1, walking trolley; 2, robotic arm; 4, protective box; 5, batching box; 51, finished product box; 52, mixing box; 56, discharge port; 57, switch plate; 6, slurry tank; 61, slurry hopper; 62, connecting pipe; 63, discharge pipe; 64, rotating shaft; 65, trough; 66, reamer; 67, pulley set; 7, water tank; 71, water bucket; 711, motor; 72, water outlet pipe; 73, rotary valve; 74, first ratchet; 75, first ratchet ring; 76, first sprocket set; 77, second ratchet; 78, second ratchet ring; 79, second sprocket set; 8, mixing paddle. Detailed implementation manners

[0037] The present invention will be further described in detail below with reference to the accompanying drawings. Embodiment

[0038] As Figure 1 , Figure 2 shown, a spraying structure for wall latex paint includes a workbench 01, a spray bar 02, a support rod 03, a movable rod 04 and a drive mechanism 05.

[0039] As Figure 1 , Figure 2 shown, the workbench 01 is horizontally arranged, the spray bar 02 includes a rubber tube 021 and a pair of steel pipes 022, the pair of steel pipes 022 are arranged at both ends of the rubber tube 021, nozzles 023 are arranged on both the rubber tube 021 and the steel pipes 022, and an injection pipe 024 is connected to the middle position of the rubber tube 021.

[0040] As Figure 1 , Figure 2 , Figure 3 shown, a screw 025 is horizontally rotatably connected inside the steel pipe 022, a partition 026 is threadedly connected to the screw 025, and the partition 026 is horizontally slidably connected to the steel pipe 022 for realizing the free switching of the opening and closing of the vertical beam of the nozzle 023.

[0041] As shown Figure 1 in Figure 2 Figures 1 and 2, the support rod 03 is vertically arranged on the workbench 01, and the upper end is fixed at the middle position of the rubber tube 021. The movable rod 04 is vertically arranged on the workbench 01 and is distributed on both sides of the support rod 03. The upper end of the movable rod 04 is fixed at the middle position of the steel pipe 022, and the lower end is provided with an arc-shaped slider 041. An arc-shaped chute 042 for the slider 041 to slide is arranged on the workbench 01.

[0042] As shown Figure 1 in Figure 2 Figures 3 and 4, the driving mechanism 05 is used to control the synchronous sliding of a pair of sliders 041. The driving mechanism 05 includes a shaft rod 051, a driving rod 052, a gear 053, a rack 054 and a locking rod 055.

[0043] As shown Figure 1 in Figure 2 Figures 5 and 6, the shaft rod 051 is vertically arranged on the workbench 01 and is distributed on both sides of the support rod 03. The driving rod 052 is rotatably connected to the shaft rod 051, fixed to the inner side wall of the slider 041, and the gear 053 is arranged at the end position of the driving rod 052.

[0044] As shown Figure 1 in Figure 2 Figures 7 and 8, the rack 054 is horizontally slidably connected to the workbench 01 and meshes with the gear 053. The locking rod 055 vertically penetrates the rack 054, and a row of locking holes 056 for the locking rod 055 to be inserted is arranged on the workbench 01.

[0045] When painting the inner and outer corners of the wall, first pull out the locking rod 055 from the locking hole 056, and then control the horizontal sliding of the rack 054. At this time, under the cooperation of the rack 054 and the gear 053, the driving rod 052 will be controlled to rotate.

[0046] Subsequently, the driving rod 052 drives the slider 041 to slide in the chute 042, and the slider 041 drives the movable rod 04 to move synchronously. At this time, the movable rod 04 drives the steel pipe 022 to move synchronously and drives the rubber tube 021 to bend, realizing the adjustment of the included angle between a pair of steel pipes 022 to adapt to inner and outer corners of different angles.

[0047] When the included angle between a pair of steel pipes 022 meets the usage requirements, vertically insert the locking rod 055 into the corresponding locking hole 056 to complete the fixation of the rack 054, thereby realizing the fixation of the steel pipe 022 to complete the angle adjustment of the entire spray rod 02.

[0048] Finally, pour the latex paint into the injection pipe 024, and make the latex paint spray out along the nozzles 023 on the steel pipe 022 and the rubber pipe 021 to achieve the painting operation on the wall surface.

[0049] When painting a large-area flat wall surface, the spray bar 02 can be adjusted into a straight shape to meet the needs of large-area painting.

[0050] And before painting, the screw 025 can be controlled to rotate. The screw 025 drives the partition 026 to slide synchronously. The position where the partition 026 slides determines the opening and closing of several nozzles 023, so as to adapt to the spraying requirements of spraying positions with different widths and improve the practicability of the entire spraying structure.

[0051] Therefore, by setting the spray bar 02 with adjustable angle, the spray bar 02 can be adjusted into a straight shape to achieve the spraying operation on a large-area wall surface, improve the construction efficiency. The spray bar 02 can also be adjusted into a right angle shape inward or outward to adapt to the internal or external corner positions, ensure the consistency of the paint thickness at the internal and external corner positions, avoid overspraying or missed spraying phenomena, and improve the construction quality. Embodiment

[0052] As Figure 4 、 Figure 5 shown, a spraying structure spraying robot for wall latex paint includes a walking trolley 1, a robotic arm 2, a protective box 4, a batching box 5, a slurry box 6 and a water tank 7.

[0053] As Figure 4 、 Figure 5 shown, the walking trolley 1 is used to walk on the ground and move the walking trolley 1 to the position where the paint needs to be sprayed. The robotic arm 2 is arranged on the walking trolley 1 and is used for installing and fixing the workbench 01, so as to control the position of the workbench 01 by using the robotic arm 2 to achieve the painting operation on the wall surface.

[0054] As Figure 4 、 Figure 5 、 Figure 6 shown, the protective box 4 is arranged on the walking trolley 1 in a hollow manner. The batching box 5 is arranged inside the protective box 4 and includes a finished product box 51 and a stirring box 52. The lower end of the finished product box 51 is communicated with the injection pipe 024. The stirring box 52 is arranged above the finished product box 51 and is internally provided with a stirring paddle 8. The lower end of the stirring box 52 is provided with a discharge port 56, and a switch plate 57 is horizontally slidably connected at the position of the discharge port 56.

[0055] As Figure 5 、 Figure 6 、 Figure 7 shown, the slurry box 6 is arranged above one end of the stirring box 52 and is communicated with the stirring box 52. The slurry box 6 includes a slurry hopper 61, a connecting pipe 62, a discharge pipe 63 and a rotating shaft 64.

[0056] As Figure 5 、 Figure 6 、 Figure 7 shown, the slurry hopper 61 is vertically arranged, the connecting pipe 62 is horizontally connected and arranged below the slurry hopper 61, and the discharge pipe 63 is connected to the connecting pipe 62 and the mixing tank 52. The rotating shaft 64 is horizontally rotatably connected in the connecting pipe 62, and a material groove 65 for connecting the slurry hopper 61 and the discharge pipe 63 is arranged on the rotating shaft 64.

[0057] As Figure 5 、 Figure 6 、 Figure 7 shown, a reamer 66 is horizontally rotatably connected in the slurry hopper 61, and a pulley group 67 that cooperates with each other is arranged between the rotating shaft 64 and the reamer 66.

[0058] As Figure 5 、 Figure 6 、 Figure 7 shown, the water tank 7 is arranged above the other end of the mixing tank 52 and is connected to the mixing tank 52. The water tank 7 includes a water bucket 71, a water outlet pipe 72 and a rotary valve 73. The water bucket 71 is vertically arranged, the water outlet pipe 72 is vertically connected to the water bucket 71 and the mixing tank 52, and the rotary valve 73 is arranged on the water outlet pipe 72.

[0059] As Figure 5 、 Figure 6 、 Figure 7 shown, a first ratchet wheel 74 and a first ratchet tooth ring 75 are arranged at the end of the rotary valve 73. The first ratchet tooth ring 75 is rotatably connected to the outside of the first ratchet wheel 74, and a first sprocket group 76 that cooperates with each other is arranged between the first ratchet tooth ring 75 and the rotating shaft 64.

[0060] As Figure 5 、 Figure 6 、 Figure 7 shown, a second ratchet wheel 77 and a second ratchet tooth ring 78 are arranged at the end of the rotary valve 73. The directions of the second ratchet wheel 77 and the second ratchet tooth ring 78 are opposite to those of the first ratchet wheel 74 and the first ratchet tooth ring 75. The second ratchet tooth ring 78 is rotatably connected to the outside of the second ratchet wheel 77. A motor 711 is arranged on the outer wall of the water bucket 71, and a second sprocket group 79 that cooperates with each other is arranged between the second ratchet tooth ring 78 and the motor 711.

[0061] When spray painting the wall is required, the slurry and clean water are respectively put into the slurry tank 6 and the water tank 7. At this time, the reduction gear is used to control the intermittent rotation of the rotating shaft 64. When the material groove 65 on the rotating shaft 64 rotates to the upper end, the material groove 65 communicates with the slurry hopper 61, and at this time, the slurry enters the material groove 65. When the material groove 65 rotates to the lower end, the material groove 65 communicates with the discharge pipe 63, and at this time, the slurry is quantitatively put into the mixing tank 52.

[0062] When the rotating shaft 64 rotates, under the cooperative action of the pulley group 67, the reamer 66 in the slurry tank 6 will be driven to rotate synchronously, realizing the stirring of the slurry, breaking the interaction between the slurries, preventing the occurrence of arching and jamming phenomena, and enabling the slurry to stably enter the trough 65.

[0063] And when the rotating shaft 64 rotates, under the cooperative action of the first sprocket group 76, the first ratchet ring 75 is driven to rotate. At this time, the first ratchet ring 75 and the first ratchet 74 can interact with each other, enabling the first ratchet 74 to rotate synchronously with the first ratchet ring 75 and driving the rotary valve 73 to rotate, realizing the continuous opening and closing control of the water outlet pipe 72, and enabling the clear water to be quantitatively input into the mixing tank 52. And when the rotating shaft 64 drives the rotary valve 73 to rotate, there is no relative action between the second ratchet 77 and the second ratchet ring 78, and it will rotate idly, thus having no impact on the motor 711.

[0064] After the slurry and the clear water are input into the mixing tank 52, the stirring paddle 8 can be used to fully stir the raw materials, realizing the full stirring and mixing of the raw materials. After the raw materials are prepared, the switch plate 57 is opened, and the paint enters the finished product tank 51 and can be transported to the injection pipe 024 for spray painting operations. At this time, under the action of the traveling trolley 1 and the robotic arm 2, the spraying operation on the wall surface is realized, completing the automatic spraying of the paint.

[0065] Therefore, by setting the batching tank 5 that can continuously prepare the latex paint, the continuous preparation and supply of the latex paint are realized, meeting the spraying requirements, eliminating the need to stop the machine for replenishing the latex paint, and at the same time realizing the preparation of the latex paint as needed, thereby reducing the waste of the latex paint.

[0066] When the spraying operation is not required, the motor 711 is controlled to work. At this time, under the cooperative action of the second sprocket group 79, the second ratchet ring 78 is driven to rotate. At this time, the second ratchet ring 78 and the second ratchet 77 can rotate synchronously, and the first ratchet 74 and the first ratchet ring 75 rotate idly.

[0067] Subsequently, the second ratchet 77 drives the rotary valve 73 to rotate, realizing the opening of the water tank 7, enabling the clear water to pass through the positions where the paint passes in sequence, enabling the clear water to wash all the working parts, ensuring the cleanliness of the working parts, and avoiding the blockage phenomenon caused by the solidification of the latex paint.

[0068] Therefore, by setting the rotary valve 73 on the water tank 7 that can be opened and closed bidirectionally, the water in the water tank 7 can be opened and closed following the operation of the slurry tank 6, realizing the preparation of the latex paint, and can also be opened and closed separately, enabling the clear water to wash all the working parts, ensuring the cleanliness of the working parts, and avoiding the blockage phenomenon caused by the solidification of the latex paint.

[0069] The specific embodiments are only explanations of the present invention and do not limit the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A spraying structure for wall latex paint, characterized in that: include: The workbench (01) is arranged horizontally; The spray bar (02) comprises a rubber tube (021) and a pair of steel tubes (022), wherein the pair of steel tubes (022) are arranged at both ends of the rubber tube (021), nozzles (023) are arranged on the rubber tube (021) and the steel tube (022), and a material injection tube (024) is connected to the middle of the rubber tube (021); A support rod (03) is vertically arranged on the workbench (01), and the upper end of the support rod is fixed to the middle position of the rubber tube (021); A movable rod (04) is vertically arranged on the workbench (01) and distributed on both sides of the support rod (03); the upper end of the movable rod (04) is fixed to the middle position of the steel pipe (022), and the lower end is provided with an arc-shaped slider (041); the workbench (01) is provided with an arc-shaped slide groove (042) for the slider (041) to slide; A driving mechanism (05) for controlling a pair of sliders (041) to slide synchronously; The driving mechanism (05) comprises a shaft (051), a driving rod (052), a gear (053), a rack (054) and a locking rod (055); the shaft (051) is vertically arranged on the workbench (01) and distributed on both sides of the support rod (03); the driving rod (052) is rotatably connected to the shaft (051) and fixed to the inner wall of the slider (041); the gear (053) is arranged at the end position of the driving rod (052); the rack (054) is laterally slidably connected to the workbench (01) and meshes with the gear (053); the locking rod (055) vertically penetrates the rack (054); and a row of locking holes (056) for the locking rod (055) to be inserted is arranged on the workbench (01).

2. The wall latex paint spraying structure according to claim 1, characterized in that: A screw rod (025) is horizontally rotatably connected inside the steel pipe (022), a partition plate (026) is threadedly connected to the screw rod (025), and the partition plate (026) is horizontally slidably connected to the steel pipe (022).

3. A spraying robot for spraying latex paint on a wall, using the spraying structure as described in any one of claims 1-2, characterized in that: include: A walking trolley (1), used for walking on the ground; A mechanical arm (2) is arranged on the walking trolley (1) and is used for mounting and fixing the workbench (01); A protective box (4) is hollow and is arranged on the walking trolley (1); A batching box (5) is arranged inside the protection box (4), and comprises a finished product box (51) and a mixing box (52); the lower end of the finished product box (51) is connected to the injection pipe (024); the mixing box (52) is arranged above the finished product box (51) and is provided with a mixing paddle (8) inside; the lower end of the mixing box (52) is provided with a discharge port (56), and the discharge port (56) is horizontally slidably connected to a switch plate (57); A slurry box (6) is disposed above one end of the stirring box (52) and is connected to the stirring box (52); The water tank (7) is arranged above the other end of the stirring tank (52) and is connected to the stirring tank (52).

4. The spraying robot for spraying wall latex paint according to claim 3, characterized in that: The slurry box (6) includes a slurry hopper (61), a connecting pipe (62), a discharge pipe (63) and a rotating shaft (64); the slurry hopper (61) is vertically arranged; the connecting pipe (62) is horizontally connected and arranged below the slurry hopper (61); the discharge pipe (63) is connected and arranged to connect the connecting pipe (62) and the stirring box (52); the rotating shaft (64) is horizontally rotatably connected in the connecting pipe (62); and a material trough (65) for connecting the slurry hopper (61) and the discharge pipe (63) is arranged on the rotating shaft (64).

5. The spraying robot for spraying wall latex paint according to claim 4, characterized in that: A reamer (66) is horizontally rotatably connected inside the slurry hopper (61), and a pulley group (67) that cooperates with each other is arranged between the rotating shaft (64) and the reamer (66).

6. The spraying robot for spraying wall latex paint according to claim 5, characterized in that: The water tank (7) comprises a water bucket (71), a water outlet pipe (72) and a rotary valve (73); the water bucket (71) is arranged vertically; the water outlet pipe (72) vertically connects the water bucket (71) and the mixing tank (52); and the rotary valve (73) is arranged on the water outlet pipe (72).

7. The spraying robot for spraying wall latex paint according to claim 6, characterized in that: A first ratchet wheel (74) and a first ratchet ring (75) are provided at the end of the rotary valve (73); the first ratchet ring (75) is rotatably connected to the outer side of the first ratchet wheel (74), and a first sprocket set (76) that cooperates with the rotating shaft (64) is provided between the first ratchet ring (75).

8. The spraying robot for spraying wall latex paint according to claim 7, characterized in that: A second ratchet wheel (77) and a second ratchet ring (78) are provided at the end of the rotary valve (73); the directions of the second ratchet wheel (77) and the second ratchet ring (78) are opposite to the directions of the first ratchet wheel (74) and the first ratchet ring (75); the second ratchet ring (78) is rotatably connected to the outer side of the second ratchet wheel (77); a motor (711) is provided on the outer wall of the water bucket (71); and a second sprocket set (79) that cooperates with each other is provided between the second ratchet ring (78) and the motor (711).

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