Spraying pile head

Abstract

The utility model relates to a spraying pile head which comprises a mounting base, a rotating base, a spraying base, a connecting assembly, a first driving mechanism and a second driving mechanism, a water inlet is formed in the mounting base, the rotating base is rotationally connected to the mounting base in the vertical direction, the first driving mechanism is used for driving the rotating base to rotate, a nozzle is arranged in the spraying base, and the connecting assembly is connected to the second driving mechanism. A swing frame is arranged on the spraying base and rotationally connected to the rotating base in the horizontal direction, the second driving mechanism is used for driving the swing frame to swing, and the connecting assembly is used for connecting the water inlet and the nozzle. The first driving mechanism drives the spraying base to rotate, and the second driving mechanism drives the spraying base to swing, so that the orientation of the spraying head is changed, water mist sprayed by the spraying head is subjected to rotary spraying and up-down swing spraying at the same time, meanwhile, the spraying head can spray upwards, and the coverage area of the water mist of the spraying pile head is increased; therefore, the dust falling effect of the spraying pile head is improved.

Description

Technical Field

[0001] The utility model relates to the field of spray devices, in particular to a spray pile head. Background Art

[0002] High-pressure mist piles are highly efficient and environmentally friendly spray dust suppression devices widely used for dust control in urban roads, construction sites, and other locations. They operate by pressurizing water through a high-pressure system, which then sprays a fine mist through a specially designed nozzle. This mist combines with dust particles in the air, causing them to increase in weight and settle, thereby achieving the desired dust reduction effect.

[0003] The utility model with publication number CN214132262U relates to a spray pile, including a rotating head, a mist pile rod, a disc and a supporting inclined plate. The bottom end of the rotating head is connected to the disc through the mist pile rod, and the disc is welded and fixed to the supporting inclined plate of the annular array by welding wire. The rotating head includes a stepping first motor connected to a first rotating tooth, one end of the first rotating tooth is engaged with each other and transmitted with a second rotating tooth, the second rotating gear is connected to a deep groove ball bearing fixed on the spray pipe, and the bottom end of the deep groove ball bearing is connected to a bearing seat placed on the inner wall of the box.

[0004] The rotating head in the above technical solution can only rotate horizontally, and its water mist can only cover the dust particles below the mist pile rod, and cannot reduce the dust particles above the mist pile rod. The water mist covers a small area and the dust reduction effect is poor. Utility Model Content

[0005] In order to increase the coverage area of ​​the water mist of the spray pile head, the present application provides a spray pile head.

[0006] The spray pile head provided in this application adopts the following technical solution:

[0007] A spray pile head includes a mounting base, a rotating base, a spray base, a connecting assembly, a first driving mechanism and a second driving mechanism. The mounting base is provided with a water inlet, the rotating base is connected to the mounting base in a vertical direction, the first driving mechanism is used to drive the rotation of the rotating base, a nozzle is provided in the spray base, a swing frame is provided on the spray base, the swing frame is connected to the rotating base in a horizontal direction, the second driving mechanism is used to drive the swing of the swing frame, and the connecting assembly is used to connect the water inlet and the nozzle.

[0008] By adopting the above technical solution, the spray seat is driven to rotate by the first driving mechanism, and the spray seat is driven to swing by the second driving mechanism, thereby changing the direction of the nozzle, so that the water mist sprayed by the nozzle can be simultaneously rotated and swung up and down for spraying. At the same time, the nozzle can be sprayed upward, increasing the coverage area of ​​the water mist of the spray pile head, thereby improving the dust reduction effect of the spray pile head.

[0009] Preferably, the connecting assembly includes a first connecting member, a second connecting member, a third connecting member and a fourth connecting member, the fourth connecting member is arranged on a rotating seat, the third connecting member is arranged on a water inlet, a rotating chamber is provided on the third connecting member, the second connecting member is rotatably connected in the rotating chamber, one end of the second connecting member passes through the third connecting member from the bottom wall side of the rotating chamber and is threadedly connected to the fourth connecting member, the first connecting member is threadedly connected to the rotating chamber and abuts against an end of the second connecting member away from the fourth connecting member, the first connecting member, the second connecting member and the fourth connecting member are respectively provided with water flow channels, and the multiple water flow channels are interconnected.

[0010] By adopting the above technical solution, when the rotating seat rotates, the second connecting member rotates in the rotating cavity of the third connecting member, reducing the possibility of the connecting component interfering with the rotation of the rotating seat; by threading the second connecting member on the fourth connecting member and the third connecting member on the first connecting member, it is easy to assemble while increasing the sealing between the second connecting member and the fourth connecting member and between the third connecting member and the first connecting member, reducing the possibility of water leakage in the spray pile head.

[0011] Preferably, a first sealing groove is provided on the first connecting mechanism, and a first sealing member is provided in the first sealing groove. When the first connecting member is threadedly connected to the rotating chamber, the first connecting member abuts against the second connecting member. A plurality of second sealing grooves are provided on the second connecting member, and the plurality of second sealing grooves are evenly arranged along the axial direction of the second connecting member. A second sealing member is respectively provided in the plurality of second sealing grooves. When the second connecting member is located in the rotating chamber, the second sealing member abuts against the side wall of the rotating chamber.

[0012] By adopting the above technical solution, the sealing between the second connecting member and the rotating chamber, as well as the sealing between the first connecting member and the rotating chamber, is increased, thereby reducing the possibility of water leakage from the spray pile head.

[0013] Preferably, the fourth connecting member is provided with a fourth sealing groove, and a fourth sealing member is provided in the fourth sealing groove. When the second sealing member is threadedly connected to the fourth connecting member, the fourth sealing member abuts against the second connecting member.

[0014] By adopting the above technical solution, the sealing between the fourth connecting member and the second connecting member is further increased, and the possibility of water leakage from the spray pile head is reduced.

[0015] Preferably, the first driving mechanism includes a first motor and a first gear, the first motor is fixedly connected to the rotating seat, one end of the output shaft of the first motor is coaxially and fixedly connected to the second gear, the first gear is rotatably connected to the rotating seat, the first gear is meshed with the second gear, and the second gear is passed through the end of the fourth connecting member away from the second connecting member, and the fourth connecting member is coaxially and fixedly connected to the first gear.

[0016] By adopting the above technical solution, the first driving member drives the second gear to rotate, and the first gear rotates together through the meshing connection between the second gear and the first gear; when the first gear rotates, the fourth connecting member drives the second connecting member to rotate in the rotating cavity; thereby, the rotating seat rotates on the fixed seat.

[0017] Preferably, the first driving mechanism also includes a contact sensor, a contact head and a controller, the contact sensor is arranged on the rotating seat, the contact head is arranged on the mounting seat, the contact head is located on the moving path of the contact sensor, and the controller is arranged in the rotating seat. The controller is used to receive the signal of the contact sensor and control the reverse rotation of the first motor. When the contact sensor moves to abut against the contact head, the controller receives the signal and controls the first motor to change the rotation direction.

[0018] By adopting the above technical solution, when the rotating seat rotates, it drives the contact sensor to rotate together. When the contact sensor rotates to abut against the contact head, the controller receives the signal and controls the first motor to change the rotation direction, so that the rotating seat can rotate back and forth 360°, increasing the coverage area of ​​the water mist of the spray pile head.

[0019] Preferably, the connecting assembly also includes a fifth connecting piece, which is provided with a water inlet channel. Ball heads are respectively provided at both ends of the fifth connecting piece in the length direction. The water inlet channel passes through the ball heads at both ends. Nuts are movably connected to the two ball heads, one of the nuts is passed through a swing frame and fixedly connected to the spray seat, and the other nut is threadedly connected to the fourth connecting piece. The water inlet channel is connected to the water flow channel.

[0020] By adopting the above technical solution, when the swing frame swings, the ball heads at both ends of the fifth connecting member move on the nuts at both ends at the same time, thereby reducing the possibility of the connecting assembly interfering with the swing of the swing frame when the swing frame swings. Through the threaded connection between one of the nuts and the fourth connecting member, the possibility of water leakage when water flows from the water passage to the water inlet passage is reduced.

[0021] Preferably, the second driving mechanism includes a second motor, a first bevel gear and a connecting shaft, one end of the connecting shaft is fixedly connected to the swing frame, and the other end of the connecting shaft is rotatably connected to the rotating seat in the horizontal direction, the first bevel gear is coaxial and fixedly connected to the connecting shaft, the second motor is fixedly connected to the rotating seat, one end of the output shaft of the second motor is coaxial and fixedly connected to the second bevel gear, and the second bevel gear is meshed with the first bevel gear.

[0022] By adopting the above technical solution, the second motor drives the second bevel gear to rotate, and through the meshing connection between the second bevel gear and the first bevel gear, the first bevel gear and the connecting shaft move together, so that the swing frame drives the spray seat to swing, increasing the coverage area of ​​the water mist at the spray pile head.

[0023] The technical effects of this utility model are mainly reflected in the following aspects:

[0024] 1. The utility model is provided with a rotating seat and a swinging frame. The first driving mechanism drives the rotation of the spray seat, and the second driving mechanism drives the swing of the spray seat, thereby changing the direction of the nozzle, so that the water mist sprayed by the nozzle is simultaneously sprayed in a rotating manner and swung up and down. At the same time, the nozzle can be sprayed upward, increasing the coverage area of ​​the water mist of the spray pile head, thereby improving the dust reduction effect of the spray pile head;

[0025] 2. The utility model provides a connecting assembly so that when the rotating seat rotates, the second connecting member rotates in the rotating cavity of the third connecting member, thereby reducing the possibility of the connecting assembly interfering with the rotation of the rotating seat; by threading the second connecting member on the fourth connecting member, and the third connecting member on the first connecting member, assembly is facilitated while increasing the sealing between the second connecting member and the fourth connecting member, as well as between the third connecting member and the first connecting member, thereby reducing the possibility of water leakage in the spray pile head;

[0026] 3. The utility model is provided with a contact head and a contact sensor. When the rotating seat rotates, the contact sensor is driven to rotate together. When the contact sensor rotates to abut against the contact head, the controller receives the signal and controls the first motor to change the rotation direction, so that the rotating seat can rotate back and forth 360 degrees, thereby increasing the coverage area of ​​the water mist of the spray pile head. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0028] Figure 2 This is a schematic diagram of the structure of the first driving mechanism of an embodiment of the present application.

[0029] Figure 3 This is a schematic diagram of the structure of the second driving mechanism of an embodiment of the present application.

[0030] Figure 4 It is a schematic diagram of the water passage structure of an embodiment of the present application.

[0031] Figure 5 It is a schematic diagram of the water inlet channel structure of an embodiment of the present application.

[0032] Explanation of the accompanying drawings: 1. Mounting seat; 11. Water inlet; 2. Rotating seat; 3. Spray seat; 31. Spray nozzle; 4. Swinging frame; 5. Connecting assembly; 51. First connecting member; 511. First sealing groove; 512. First sealing member; 52. Second connecting member; 521. Second sealing groove; 522. Second sealing member; 53. Third connecting member; 531. Rotating chamber; 54. Fourth connecting member; 541. Fourth sealing groove; 542. Fourth sealing member; 55. Fifth connecting member; 551. Ball head; 552. Nut; 56. Water passage; 57. Water inlet channel; 58. Bend pipe; 6. First driving mechanism; 61. First motor; 611. Second gear; 62. First gear; 63. Contact sensor; 64. Contact head; 65. Controller; 7. Second driving mechanism; 71. Second motor; 711. Second bevel gear; 72. First bevel gear; 73. Connecting shaft DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-5 The present application is further described in detail to make the technical solution of the present application easier to understand and grasp.

[0034] The embodiment of the present application discloses a spray pile head.

[0035] Reference Figure 1-Figure 5 A spray pile head of this embodiment includes a mounting base 1, a rotating base 2, a spray base 3, a connecting assembly 5, a first driving mechanism 6 and a second driving mechanism 7. A water inlet 11 is provided on the mounting base 1, and the rotating base 2 is connected to the mounting base 1 in a vertical direction. The first driving mechanism 6 is used to drive the rotation of the rotating base 2. A nozzle is fixedly connected to the spray base 3, and a swing frame 4 is fixedly connected to the spray base 3. The swing frame 4 is connected to the rotating base 2 in a horizontal direction. The second driving mechanism 7 is used to drive the swing of the swing frame 4. The connecting assembly 5 is used to connect the water inlet 11 and the nozzle.

[0036] Reference Figure 1-Figure 5 The first driving mechanism 6 drives the rotation of the spray seat 3, and the second driving mechanism 7 drives the swing of the spray seat 3, thereby changing the direction of the nozzle, so that the water mist sprayed by the nozzle can be simultaneously rotated and swung up and down. At the same time, the nozzle can be sprayed upward, increasing the coverage area of ​​the water mist of the spray pile head, thereby improving the dust reduction effect of the spray pile head.

[0037] Reference Figure 1-Figure 4The connecting assembly 5 includes a first connecting member 51, a second connecting member 52, a third connecting member 53 and a fourth connecting member 54. The fourth connecting member 54 is fixedly connected to the rotating seat 2, the third connecting member 53 is fixedly connected to the water inlet 11, and a rotating chamber 531 is provided on the third connecting member 53. The second connecting member 52 is rotatably connected in the rotating chamber 531. One end of the second connecting member 52 passes through the third connecting member 53 from one side of the bottom wall of the rotating chamber 531 and is threadedly connected to the fourth connecting member 54. The first connecting member 51 is threadedly connected to the rotating chamber 531 and abuts against one end of the second connecting member 52 away from the fourth connecting member 54. Water passages 56 are respectively provided on the first connecting member 51, the second connecting member 52 and the fourth connecting member 54, and the multiple water passages 56 are connected to each other.

[0038] Reference Figure 1-Figure 4 The first connecting member 51 is provided with a first sealing groove 511, and a first sealing member 512 is provided in the first sealing groove 511. When the first connecting member 51 is threadedly connected to the rotating chamber 531, the first connecting member 51 abuts against the second connecting member 52. The second connecting member 52 is provided with a plurality of second sealing grooves 521, which are evenly arranged along the axis of the second connecting member 52. Second sealing members 522 are respectively sleeved in the plurality of second sealing grooves 521. When the second connecting member 52 is located in the rotating chamber 531, the second sealing members 522 abut against the sidewall of the rotating chamber 531. This improves the sealing between the second connecting member 52 and the rotating chamber 531, as well as the sealing between the first connecting member 51 and the rotating chamber 531, and reduces the possibility of water leakage from the spray pile head. The fourth connecting member 54 defines a fourth sealing groove 541, into which a fourth sealing member 542 is snap-fitted. When the second sealing member 522 is threadedly connected to the fourth connecting member 54, the fourth sealing member 542 abuts against the second connecting member 52. This further enhances the seal between the fourth connecting member 54 and the second connecting member 52, reducing the possibility of water leakage from the spray pile head. The first sealing member 512, the second sealing member 522, and the fourth sealing member 542 are all made of rubber.

[0039] Reference Figure 1-Figure 4 When the rotating seat rotates, the second connecting member 52 rotates in the rotating cavity 531 of the third connecting member 53, reducing the possibility of the connecting assembly 5 interfering with the rotation of the rotating seat; by threading the second connecting member 52 on the fourth connecting member 54 and the third connecting member 53 on the first connecting member 51, the assembly is facilitated while increasing the sealing between the second connecting member 52 and the fourth connecting member 54 and between the third connecting member 53 and the first connecting member 51, thereby reducing the possibility of water leakage in the spray pile head.

[0040] Reference Figure 1-Figure 3The first driving mechanism 6 includes a first motor 61 and a first gear 62. The first motor 61 is fixedly connected to the rotating base 2. One end of the output shaft of the first motor 61 is coaxially and fixedly connected to the second gear 611. The first gear 62 is rotatably connected to the rotating base 2. The first gear 62 and the second gear 611 are meshed and connected. The second gear 611 is passed through the end of the fourth connecting member 54 away from the second connecting member 52. The fourth connecting member 54 is coaxially and fixedly connected to the first gear 62. The first driving member drives the second gear 611 to rotate. Through the meshing connection between the second gear 611 and the first gear 62, the first gear 62 rotates together. When the first gear 62 rotates, the fourth connecting member 54 drives the second connecting member 52 to rotate within the rotating cavity 531, thereby rotating the rotating base on the fixed base.

[0041] Reference Figure 1-Figure 3 The first drive mechanism 6 further includes a contact sensor 63, a contact head 64, and a controller 65. The contact sensor 63 is disposed on the rotating base, and the contact head 64 is disposed on the mounting base 1. The contact head 64 is located in the moving path of the contact sensor 63. The controller 65 is disposed within the rotating base. The controller 65 is configured to receive signals from the contact sensor 63 and control the first motor 61 to rotate in the opposite direction. When the contact sensor 63 moves to abut against the contact head 64, the controller 65 receives the signal and controls the first motor 61 to change its rotation direction. When the rotating base rotates, it drives the contact sensor 63 to rotate together. When the contact sensor 63 rotates to abut against the contact head 64, the controller 65 receives the signal and controls the first motor 61 to change its rotation direction, allowing the rotating base to rotate 360° back and forth, thereby increasing the coverage area of ​​the water mist of the spray pile head.

[0042] Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 5 The connecting assembly 5 also includes a fifth connecting member 55, which is provided with a water inlet channel 57. Ball heads 551 are fixedly connected at each end of the fifth connecting member 55 in the longitudinal direction. The water inlet channel 57 passes through the ball heads 551 at both ends. Nuts 552 are movably connected to the two ball heads 551. One nut 552 passes through the swing frame 4 and is fixedly connected to the spray seat 3. The other nut 552 is threadedly connected to the fourth connecting member 54. The water inlet channel 57 is connected to the water flow channel 56. Rubber pads are fixedly connected to the two nuts 552, and the ends of the two ball heads 551 closest to the fifth connecting member 55 abut against the rubber pads.

[0043] Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 5When the swing frame 4 swings, the ball heads 551 at both ends of the fifth connecting member 55 move simultaneously on the nuts 552 at both ends, reducing the possibility of the connecting assembly 5 interfering with the swing of the swing frame 4 when the swing frame 4 swings. Through the threaded connection between one of the nuts 552 and the fourth connecting member 54, the possibility of water leakage when flowing from the water passage 56 to the water inlet passage 57 is reduced.

[0044] Reference Figure 1-Figure 3 The second driving mechanism 7 includes a second motor 71, a first bevel gear 72, and a connecting shaft 73. One end of the connecting shaft 73 is fixedly connected to the swing frame 4, and the other end of the connecting shaft 73 is horizontally connected to the rotating base. The first bevel gear 72 is coaxially and fixedly connected to the connecting shaft 73. The second motor 71 is fixedly connected to the rotating base. One end of the output shaft of the second motor 71 is coaxially and fixedly connected to the second bevel gear 711. The second bevel gear 711 is meshed with the first bevel gear 72. The controller 65 is also used to control the opening and closing and rotation direction of the second motor 71. The second motor 71 drives the second bevel gear 711 to rotate. Through the meshing connection between the second bevel gear 711 and the first bevel gear 72, the first bevel gear 72 and the connecting shaft 73 move together, thereby causing the swing frame 4 to drive the spray base 3 to swing, increasing the coverage area of ​​the water mist of the spray pile head.

[0045] Reference Figure 1-Figure 5 The connecting assembly 5 also includes a bend 58, the two ends of the bend 58 in the length direction of which are threadedly connected to the nut 552 and the nozzle respectively. The water flows into the first connecting member 51, flows through the water channel 56, the water inlet channel 57 and the bend 58 in sequence, and is sprayed out from the nozzle.

[0046] Of course, the above are only typical examples of the present application. In addition, the present application may have many other specific implementation methods. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present application.

Claims

1. A spray pile head, characterized by: The invention comprises a mounting seat (1), a rotating seat (2), a spray seat (3), a connecting assembly (5), a first driving mechanism (6) and a second driving mechanism (7); the mounting seat (1) is provided with a water inlet (11); the rotating seat (2) is connected to the mounting seat (1) in a vertical rotation direction; the first driving mechanism (6) is used to drive the rotation of the rotating seat (2); a nozzle is provided in the spray seat (3); a swing frame (4) is provided on the spray seat (3); the swing frame (4) is connected to the rotating seat (2) in a horizontal rotation direction; the second driving mechanism (7) is used to drive the swing frame (4) to swing; and the connecting assembly (5) is used to connect the water inlet (11) and the nozzle.

2. A spray pile head according to claim 1, characterized in that: The connecting assembly (5) comprises a first connecting member (51), a second connecting member (52), a third connecting member (53) and a fourth connecting member (54), wherein the fourth connecting member (54) is provided on the water inlet (11), the third connecting member (53) is provided on the mounting seat (1), a rotating cavity (531) is provided on the third connecting member (53), the second connecting member (52) is rotatably connected in the rotating cavity (531), one end of the second connecting member (52) passes through the third connecting member (53) from one side of the bottom wall of the rotating cavity (531) and is threadedly connected to the fourth connecting member (54), the first connecting member (51) is threadedly connected to the rotating cavity (531) and abuts against one end of the second connecting member (52) away from the fourth connecting member (54), and the first connecting member (51), the second connecting member (52) and the fourth connecting member (54) are respectively provided with water passages (56), and a plurality of the water passages (56) are interconnected.

3. The spray pile head according to claim 2, characterized in that: A first sealing groove (511) is provided on the first connecting member (51), and a first sealing member (512) is provided in the first sealing groove (511). When the first connecting member (51) is threadedly connected to the rotating chamber (531), the first connecting member (51) abuts against the second connecting member (52). A plurality of second sealing grooves (521) are provided on the second connecting member (52), and the plurality of second sealing grooves (521) are evenly arranged along the axial direction of the second connecting member (52). A second sealing member (522) is respectively provided in the plurality of second sealing grooves (521). When the second connecting member (52) is located in the rotating chamber (531), the second sealing member (522) abuts against the side wall of the rotating chamber (531).

4. The spray pile head according to claim 3, characterized in that: The fourth connecting member (54) is provided with a fourth sealing groove (541), and a fourth sealing member (542) is provided in the fourth sealing groove (541). When the second sealing member (522) is threadedly connected to the fourth connecting member (54), the fourth sealing member (542) abuts against the second connecting member (52).

5. The spray pile head according to claim 2, characterized in that: The first driving mechanism (6) comprises a first motor (61) and a first gear (62), wherein the first motor (61) is fixedly connected in the rotating seat (2), one end of the output shaft of the first motor (61) is coaxially and fixedly connected with the second gear (611), the first gear (62) is rotatably connected in the rotating seat (2), the first gear (62) is meshedly connected with the second gear (611), and the second gear (611) is passed through the end of the fourth connecting member (54) away from the second connecting member (52), and the fourth connecting member (54) is coaxially and fixedly connected to the first gear (62).

6. The spray pile head according to claim 5, characterized in that: The first driving mechanism (6) further comprises a contact sensor (63), a contact head (64) and a controller (65); the contact sensor (63) is arranged on a rotating seat; the contact head (64) is arranged on a mounting seat (1); the contact head (64) is located on a moving path of the contact sensor (63); the controller (65) is arranged in the rotating seat; the controller (65) is used to receive a signal from the contact sensor (63) and control the first motor (61) to rotate in the opposite direction; when the contact sensor (63) moves to abut against the contact head (64), the controller (65) receives the signal and controls the first motor (61) to change the rotation direction.

7. The spray pile head according to claim 2, characterized in that: The connecting assembly (5) further comprises a fifth connecting member (55), the fifth connecting member (55) being provided with a water inlet channel (57), and ball heads (551) being provided at both ends of the length direction of the fifth connecting member (55), the water inlet channel (57) passing through the ball heads (551) at both ends, and nuts (552) being movably connected to the two ball heads (551), one of the nuts (552) passing through the swing frame (4) and fixedly connected to the spray seat (3), and the other nut (552) being threadedly connected to the fourth connecting member (54), and the water inlet channel (57) being communicated with the water passage (56).

8. The spray pile head according to claim 7, characterized in that: The second driving mechanism (7) comprises a second motor (71), a first bevel gear (72) and a connecting shaft (73); one end of the connecting shaft (73) is fixedly connected to the swing frame (4); the other end of the connecting shaft (73) is connected to the rotating seat in a horizontal rotation; the first bevel gear (72) is coaxially and fixedly connected to the connecting shaft (73); the second motor (71) is fixedly connected to the rotating seat; one end of the output shaft of the second motor (71) is coaxially and fixedly connected to the second bevel gear (711); the second bevel gear (711) is meshed with the first bevel gear (72).

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