Mixing device for painting pigment production

Abstract

The invention relates to the technical field of pigment production, and discloses a mixing device for painting pigment production, which comprises three mutually independent mixing cylinders, the three mixing cylinders are distributed along the circumferential direction, each stirring shaft is provided with a spline shaft, the spline shaft is provided with a pinion which slides up and down, the top surfaces of the three mixing cylinders are jointly provided with a bearing seat, and the bearing seat is provided with a plurality of stirring blades. A large gear jointly meshed with the three small gears is rotationally arranged on the bearing seat, an adjusting assembly enabling any small gear or jointly enabling any two small gears to slide up and down is arranged on the bearing seat, and a power switching assembly is arranged between the large gear and a power source of the lifting seat. According to the device, raw materials in three mixing cylinders, any two mixing cylinders or any one mixing cylinder can be mixed under the same power source according to needs, so that the requirement of the device on the power source is reduced, and the practicability of the device is also improved.

Description

Technical Field

[0001] The invention relates to the technical field of paint production, in particular to a mixing device for paint production. Background Art

[0002] Paints are an indispensable element in paintings. They can make the works more artistic and expressive through the changes in color and the presentation of texture. In painting, common types of pigments are watercolors, oil paints and acrylic paints. When painting in the fine arts profession, depending on the type and requirements of the painting, the above three pigments need to be used separately or mixed. Depending on the different ways of use, the three pigments need to be produced separately or simultaneously during the production process.

[0003] In the existing production of watercolor paint, oil paint and acrylic paint, since the components of the three kinds of paint are different, the paint pigments need to be mixed separately or simultaneously in three independent mixing barrels. The above operations need to be controlled separately under three sets of independent power sources, which requires a large amount of energy in the production process. This not only increases the demand for power sources and increases production costs, but also causes energy waste. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the above difficulties and provide a mixing device for producing three kinds of painting pigments, any one kind of painting pigment or any two kinds of painting pigments under the same power source.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is: a mixing device for producing paint, comprising three independent mixing drums, each of which is provided with a stirring shaft and a stirring blade on the stirring shaft, The three mixing drums are distributed along the circumferential direction, each stirring shaft is provided with a spline shaft and a small gear sliding up and down is provided on the spline shaft, and a bearing seat is provided on the top surface of the three mixing drums, and a large gear meshing with the three small gears is rotatably provided on the bearing seat; The bearing seat is provided with an adjustment component for making any one pinion or any two pinions slide up and down; The adjustment assembly includes a sleeve rotatably arranged on the extended end of the pinion gear, each sleeve is hinged with a swing rod 1, a sliding rod is arranged on the bearing seat at a position corresponding to each swing rod 1, each sliding rod is slidably provided with a sliding seat adapted thereto, the other end of the swing rod 1 is hinged to the sliding seat, a moving seat is slidably provided on the top surface of each sliding seat, the three moving seats are hinged with swing rods 2, and the other ends of the three swing rods 2 are hinged together on a lifting seat slidably matched with the bearing seat; An interlocking component is provided between the positioning and releasing of the sliding seat and the sliding rod and the positioning and releasing of the moving seat and the sliding seat, and a power switching component is provided between the large gear and the power source of the lifting seat.

[0006] As an improvement, the interlocking assembly includes a mounting groove opened at the end of each sliding seat, and each of the mounting grooves is provided with an upper positioning seat and a lower positioning seat at the upper and lower ends of the slide rod, which slide relative to or away from each other and cooperate with each other; A positioning pin is fixedly arranged on the top surface of the upper positioning seat, a pin hole matched with the positioning pin is opened on the bottom surface of the movable seat, and an adjusting piece for controlling the lower positioning seat to slide up and down is arranged on the sliding seat.

[0007] As an improvement, both ends of the upper positioning seat and the lower positioning seat are hinged with a rocker rod three, the other ends of the two rocker rods three on the same side are hinged to the connecting seat, and the sliding seat is provided with a guide rod one that slides with the connecting seat.

[0008] As an improvement, the adjusting member is an adjusting screw corresponding to the lower positioning seat and threadedly connected to the sliding seat, and the end of the adjusting screw is rotatably connected to the lower positioning seat.

[0009] As an improvement, a fixing seat 1 is provided on the bearing seat at a position corresponding to the lifting seat through a mounting frame 1, and an adjusting screw rod cooperating with the lifting seat thread is rotatably provided on the fixing seat 1.

[0010] As an improvement, the power switching assembly includes a bevel gear 1 arranged on the large gear, a bevel gear 2 is provided on the adjusting screw, a bevel gear 3 is slidably provided on the mounting frame 1, the bevel gear 3 selectively engages with the bevel gear 1 or the bevel gear 2, and a lifting sleeve is rotatably provided on the extending end of the bevel gear 3, and a positioning assembly for controlling the lifting sleeve to move up and down is provided on the mounting frame 1.

[0011] As an improvement, the positioning assembly includes a support frame 1 fixed with both ends of the mounting frame 1 and corresponding to the lifting sleeve, a connecting frame is slidably provided on the inner side surface of the support frame 1 along its height direction, the opposite ends of the two connecting frames are fixedly connected to the lifting sleeve, a support frame 2 is fixedly provided on the support frame 1 above the connecting frame, the two support frames 2 are hinged with a rocker rod 4, the two connecting frames are hinged with a rocker rod 5, and the other ends of the rocker rod 4 and the rocker rod 5 are hinged to each other, each rocker rod 4 is hinged with a connecting arm, the other ends of the connecting arms at both ends are hinged to an adjusting seat, an electric push rod is fixedly provided on the support frame 1 corresponding to the adjusting seat, and the movable end of the electric push rod is fixedly connected to the adjusting seat.

[0012] As an improvement, a motor is provided on mounting frame 1 between bevel gear 1 and bevel gear 2, the output shaft end of the motor is connected to a transmission shaft via a universal joint, a rotating shaft is provided on the universal joint at the other end of the transmission shaft, and bevel gear 3 is connected to the rotating shaft.

[0013] The beneficial effects of the present invention compared with the prior art are: 1. Under the action of a large gear and three small gears meshing at the same time, the stirring shafts in the three mixing barrels can be driven to rotate synchronously under the action of a power source, so that the pigments in the three mixing barrels can be mixed at the same time, reducing the demand for the number of power sources; 2. Under the action of the adjustment component, any one or two small gears can be selectively engaged or separated with the large gear, so that the pigment in any one or two mixing barrels can be stirred, which improves the practicality of the device; 3. Under the action of the power switching component, the stirring operation in the mixing drum or the power control of the regulating component can be selectively used under the same power source, thereby reducing the demand for the use of the power source; 4. Under the action of the positioning component, the lifting sleeve is moved up and down to adjust, which can not only make the bevel gear three selectively mesh with the bevel gear one or bevel gear two for transmission, but also avoid the phenomenon of single-point force on the electric push rod during the transmission process, thereby reducing the damage to the electric push rod caused by long-term and frequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The structure of the present invention is schematically shown in FIG. Figure 1 .

[0015] Figure 2 The structure of the present invention is schematically shown in FIG. Figure 2 .

[0016] Figure 3 It is a structural schematic diagram of the regulating component in the present invention.

[0017] Figure 4 It is a schematic diagram of the structure of the interlocking assembly in the present invention.

[0018] Figure 5 It is a side structural diagram of the interlocking assembly in the present invention.

[0019] Figure 6 It is a structural schematic diagram of the power switching component in the present invention.

[0020] Figure 7 It is a structural schematic diagram of the positioning component in the present invention.

[0021] Figure 8 It is a side structural diagram of the positioning component in the present invention.

[0022] Fig. 9 It is a disassembled structural diagram of the spline shaft and the pinion gear in the present invention.

[0023] As shown in the figure: 1. Mixing cylinder; 111. Spline shaft; 112. Pinion; 113. Bearing seat; 114. Big gear; 115. Mounting frame 1; 116. Fixed seat 1; 117. Mounting frame 2; 118. Fixed seat 2; 119. Support leg; 2. Adjustment assembly; 211. Sleeve; 212. Rocker rod 1; 213. Slide rod; 214. Sliding seat; 215. Moving seat; 216. Rocker rod 2; 217. Lifting seat; 218. Adjustment screw; 219. Blocking nut 1; 220. Guide rod 2; 3. Interlocking assembly; 311. Mounting slot; 312. Upper positioning seat; 313. Lower positioning seat; 314. Rocker arm three; 315, connecting seat; 316, guide rod one; 317, positioning pin; 318, adjusting screw; 319, locking nut; 4, power switching assembly; 411, bevel gear one; 412, bevel gear two; 413, motor; 414, transmission shaft; 415, rotating shaft; 416, bevel gear three; 417, lifting sleeve; 418, blocking nut two; 419, supporting cylinder; 420, supporting frame three; 5, positioning assembly; 511, supporting frame one; 512, connecting frame; 513, supporting frame two; 514, rocker arm four; 515, rocker arm five; 516, connecting arm; 517, adjusting seat; 518, electric push rod. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0025] Combined with Figure 1 , Attachment Figure 2 , Attachment Figure 3 and attached Fig. 9 As shown, a mixing device for producing painting pigments comprises three independent mixing drums 1, each mixing drum 1 is provided with a stirring shaft and a stirring blade on the stirring shaft, the three mixing drums 1 are distributed along the circumferential direction, each stirring shaft extending out of the mixing drum 1 is provided with a spline shaft 111 on the top surface, and a small gear 112 sliding up and down is provided on the spline shaft 111, a bearing seat 113 is provided on the top surface of the three mixing drums 1, and a supporting leg 119 is provided at the center of the bottom surface of the bearing seat 113, a large gear 114 meshing with the three small gears 112 is rotatably provided on the bearing seat 113, and an adjusting component 2 for making any one small gear 112 or any two small gears 112 slide up and down is provided on the bearing seat 113; The adjusting assembly 2 includes a sleeve 211 rotatably arranged on the extended end of the pinion 112, an external thread is provided on the extended end of the pinion 112 and a blocking nut 219 is threadedly connected to the external thread, each sleeve 211 is hinged with a swing rod 212, a sliding rod 213 is provided at a corresponding position of each swing rod 212 on the bearing seat 113, each of the sliding rods 213 is slidably provided with a sliding seat 214 adapted thereto, and a moving seat 215 is slidably provided on the top surface of each sliding seat 214, and the moving seat 215 is moved. The sliding cooperation between the seat 215 and the sliding seat 214 is achieved through the connection of the slide rail. The three moving seats 215 are hinged with a rocker rod 216. The other ends of the three rocker rods 216 are hinged together on a lifting seat 217 that slides with the bearing seat 113. An interlocking component 3 is provided between the positioning and releasing of the sliding seat 214 and the sliding rod 213 and the positioning and releasing of the moving seat 215 and the sliding seat 214. A power switching component 4 is provided between the large gear 114 and the power source of the lifting seat 217.

[0026] Through the above structure, when three kinds of painting pigments need to be produced simultaneously, the large gear 114 and the three small gears 112 are meshed at the same time, and the large gear 114 is controlled to rotate, which can drive the three small gears 112 to rotate synchronously, and then drive the spline shaft 111 and the stirring shaft to rotate in their respective mixing barrels 1, so as to mix the raw materials in the mixing barrel 1; When it is necessary to perform a mixing operation on any one of the mixing drums 1 or on any two mixing drums 1 at the same time, the power source is first adjusted to control the movement of the lifting seat 217 under the action of the power switching component 4, and then the sliding seat 214 and the sliding rod 213 are selectively positioned as needed under the action of the interlocking component 3, and the positioning of the moving seat 215 and the sliding seat 214 is released, and the power source is started to control the lifting seat 217 to slide downward, and under the action of the three swing rods 216, the movable seat 215 after the positioning is released is driven to slide on the sliding seat 214, and the swing rod 216 is pressed. The action of rod 216 is offset, or the movable seat 215 that has not been released from its position drives the sliding seat 214 to slide on the sliding rod 213. The sliding of the sliding seat 214 drives the swing rod 1 212 to swing, and then drives the sleeve 211 to move upward, separating its small gear 112 and large gear 114. Finally, the power source is adjusted to be able to control the rotation of the large gear 114, so that any mixing drum 1 or any two mixing drums 1 can be mixed at the same time. This not only reduces the demand for the power source of the device, but also improves the practicability of the device.

[0027] Combined with Figure 3 , Attachment Figure 4 and attached Figure 5The lock member 312 is a block diagram of a block diagram of a first embodiment of the present invention, wherein the lock member 312 is a block diagram of a first embodiment of the present invention, and the lock member 312 is a block diagram of a first embodiment of the present invention, wherein the lock member 312 is a block diagram of a first embodiment of the present invention, and the lock member 312 is a block diagram of a first embodiment of the present invention, wherein the lock member 312 is a block diagram of a first embodiment of the present invention, and the lock member 312 is a block diagram of a first embodiment of the present invention, wherein the lock member 312 is a block diagram of a first embodiment of the present invention, and the lock member 312 is a block diagram of a first embodiment of the present invention, The adjusting member is an adjusting screw 318 corresponding to the lower positioning seat 313 and threadedly connected to the sliding seat 214, and the end of the adjusting screw 318 is rotatably connected to the lower positioning seat 313, and a locking nut 319 is threadedly provided on each adjusting screw 318.

[0028] When the locking nut 319 is in the unlock state, the locking nut 318 is locked and the locking nut 319 is locked, so that the locking nut 318 can be locked to the unlocked state.

[0029] Combined with Figure 2 and attached Figure 6 As shown, a fixing seat 116 is provided on the bearing seat 113 at a position corresponding to the lifting seat 217 through a mounting frame 115, and a fixing seat 218 is provided on the mounting frame 115 at a position corresponding to the lifting seat 217 through a mounting frame 217, and an adjusting screw rod 218 which is threadedly matched with the lifting seat 217 is rotatably provided on the fixing seat 116 and the fixing seat 218, and a guide rod 220 which is slidably matched with the lifting seat 217 is fixedly provided between the fixing seat 116 and the fixing seat 218, so as to control the rotation of the adjusting screw rod 218, and drive the lifting seat 217 to slide up and down under the action of the thread force; The power switching assembly 4 includes a bevel gear 1 411 arranged on the large gear 114, a bevel gear 2 412 is arranged on the adjusting screw rod 218, and a motor 413 is arranged on the mounting frame 115 between the bevel gear 1 411 and the bevel gear 2 412, and the output shaft end of the motor 413 is connected to a retractable transmission shaft 414 through a universal joint, and a rotating shaft 415 is arranged on the universal joint at the other end of the transmission shaft 414, and a support cylinder 419 is rotatably arranged on the transmission shaft 414, and both ends of the support cylinder 419 are hinged on the support frame 3 420 fixedly connected to the mounting frame 115, so as to ensure the stability of the transmission shaft 414 during rotation; A bevel gear three 416 is provided on the rotating shaft 415, which is slidably matched with the mounting frame one 115. The bevel gear three 416 selectively meshes with the bevel gear one 411 or the bevel gear two 412. A lifting sleeve 417 is rotatably provided on the extending end of the bevel gear three 416. The extending end of the bevel gear three 416 is also provided with an external thread, and a blocking nut two 418 is threadedly connected to the external thread. A positioning component 5 for controlling the lifting sleeve 417 to move up and down is provided on the mounting frame one 115.

[0030] The working principle of the power switching component 4 is that, under the action of the positioning component 5, the lifting sleeve 417 is controlled to move up and down to adjust, so that its bevel gear three 416 selectively meshes with bevel gear two 412 or bevel gear one 411 for transmission. In the process of the lifting sleeve 417 moving up and down, the power of the motor 413 can be continuously transmitted to the rotating shaft 415 through the retractable transmission shaft 414 and the universal joints at both ends, so that the rotation of the adjusting screw 218 or the large gear 114 can be switched according to needs under the same power source.

[0031] Combined with Figure 6 , Attachment Figure 7 and attached Figure 8 As shown, the positioning assembly 5 includes a support frame 511 fixedly arranged at both ends of the mounting frame 115 and corresponding to the lifting sleeve 417, a connecting frame 512 is slidably arranged on the inner side of the supporting frame 1 511 along its height direction, and the sliding connection between the connecting frame 512 and the supporting frame 1 511 is carried out by the cooperation of the sliding groove and the sliding block, and the opposite ends of the two connecting frames 512 are fixedly connected to the lifting sleeve 417, and a supporting frame 2 513 is fixedly arranged on the supporting frame 1 511 above the connecting frame 512. Each of the support frames 513 is hinged with a rocker rod 4 514, each of the two connecting frames 512 is hinged with a rocker rod 5 515, and the other ends of the rocker rod 4 514 and the rocker rod 5 515 are hinged to each other, each rocker rod 4 514 is hinged with a connecting arm 516, and the other ends of the connecting arms 516 at both ends are hinged to an adjusting seat 517, and an electric push rod 518 is fixedly provided on the support frame 1 511 corresponding to the adjusting seat 517, and the movable end of the electric push rod 518 is fixedly connected to the adjusting seat 517.

[0032] The working principle of the positioning component 5 is to control the electric push rod 518 to retract, drive the adjustment seat 517 to move upward, and then drive the hinged connecting arms 516 at both ends to swing upward, and at the same time drive the swing rod four 514 to swing upward, and then drive the swing rod five 515 hinged thereto to swing upward, and then drive the connecting frame 512 to slide upward, and at the same time drive the lifting sleeve 417 to slide upward for adjustment. With the cooperation of the hinged connecting arm 516, the swing rod four 514 and the swing rod five 515, the lifting sleeve 417 is moved up and down for adjustment, thereby avoiding the phenomenon that the electric push rod 518 is subjected to single-point force during the transmission process, thereby reducing the damage of the electric push rod 518 during long-term and frequent use.

[0033] In the specific implementation of the present invention, when the three mixing drums 1 need to be used simultaneously, the large gear 114 and the three small gears 112 are first meshed simultaneously, and then the bevel gear 3 416 and the bevel gear 1 411 are meshed, and the motor 413 is started to drive the transmission shaft 414 to rotate, and then drive the rotating shaft 415 to rotate, and then drive the bevel gear 3 416 and the bevel gear 1 411 to rotate, and then drive the large gear 114 and the three small gears 112 to rotate synchronously, so that the three mixing drums 1 can be mixed synchronously under one power source; When it is necessary to perform a mixing operation on any one of the mixing drums 1 or on any two mixing drums 1 at the same time, first, under the action of the positioning component 5, the bevel gear three 416 is moved upward to mesh with the bevel gear two 412, and then the sliding seat 214 and the slide rod 213 are selectively positioned as needed through the interlocking component 3, and the positioning of the moving seat 215 and the sliding seat 214 is released, and the motor 413 is started. Under the action of the meshing of the bevel gear three 416 and the bevel gear two 412, the adjusting screw rod 218 is driven to rotate, and under the action of the thread force, the lifting seat 217 is driven to slide downward, and under the action of the three rocker rods 216, the lifting seat 217 is driven to release the screw rod 218. After being positioned, the movable seat 215 slides on the sliding seat 214 to offset the action of the rocker bar 216, or the movable seat 215 that has not been released from its positioning drives the sliding seat 214 to slide on the slide bar 213. The sliding of the sliding seat 214 drives the rocker bar 1 212 to swing, and then drives the sleeve 211 to move upward, separating its small gear 112 and large gear 114. Finally, the motor 413 is adjusted to be able to control the rotation of the large gear 114, so that any mixing drum 1 or any two mixing drums 1 at the same time can be mixed. This not only reduces the demand for the power source of the device, but also improves the practicality of the device.

[0034] The present invention and its embodiments are described above, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it and do not deviate from the purpose of the invention, they can creatively design a structure and embodiment similar to the technical solution, which should fall within the protection scope of the present invention.

Claims

1. A mixing device for producing paint, comprising three independent mixing drums (1), each mixing drum (1) being provided with a stirring shaft and a stirring blade on the stirring shaft, characterized in that: The three mixing drums (1) are distributed along the circumferential direction, each stirring shaft is provided with a spline shaft (111), and a small gear (112) that slides up and down is provided on the spline shaft (111), and a bearing seat (113) is provided on the top surface of the three mixing drums (1), and a large gear (114) that meshes with the three small gears (112) is rotatably provided on the bearing seat (113); An adjustment component (2) is provided on the bearing seat (113) for enabling any one pinion (112) or any two pinions (112) to slide up and down; The adjustment assembly (2) comprises a sleeve (211) rotatably arranged on the extended end of the pinion (112), each sleeve (211) is hingedly connected to a rocker rod 1 (212), a slide rod (213) is provided on the bearing seat (113) at a position corresponding to each rocker rod 1 (212), each slide rod (213) is slidably provided with a sliding seat (214) matched therewith, the other end of the rocker rod 1 (212) is hingedly connected to the sliding seat (214), a moving seat (215) is slidably provided on the top surface of each sliding seat (214), three moving seats (215) are hingedly connected to rocker rods 2 (216), and the other ends of the three rocker rods 2 (216) are hingedly connected to a lifting seat (217) slidably matched with the bearing seat (113); An interlocking component (3) is provided between the positioning and positioning release of the sliding seat (214) and the sliding rod (213) and the positioning release and positioning of the moving seat (215) and the sliding seat (214), and a power switching component (4) is provided between the large gear (114) and the power source of the lifting seat (217).

2. A mixing device for producing paint according to claim 1, characterized in that: The interlocking assembly (3) comprises a mounting groove (311) formed at the end of each sliding seat (214), and each mounting groove (311) is provided with an upper positioning seat (312) and a lower positioning seat (313) at the upper and lower ends of the sliding rod (213) that slide relative to or away from each other and cooperate with each other; A positioning pin (317) is fixedly provided on the top surface of the upper positioning seat (312), a pin hole matching the positioning pin (317) is provided on the bottom surface of the movable seat (215), and an adjusting member for controlling the lower positioning seat (313) to slide up and down is provided on the sliding seat (214).

3. A mixing device for producing paint according to claim 2, characterized in that: Both ends of the upper positioning seat (312) and the lower positioning seat (313) are hingedly connected to a swing rod three (314); the other ends of the two swing rods three (314) on the same side are hingedly connected to a connecting seat (315); and a guide rod one (316) that slidably cooperates with the connecting seat (315) is provided on the sliding seat (214).

4. A mixing device for producing paint according to claim 2 or 3, characterized in that: The adjusting member is an adjusting screw (318) corresponding to the lower positioning seat (313) and threadedly connected to the sliding seat (214), and the end of the adjusting screw (318) is rotatably connected to the lower positioning seat (313).

5. A mixing device for producing paint according to claim 1, characterized in that: A fixing seat (116) is provided on the bearing seat (113) at a position corresponding to the lifting seat (217) via a mounting frame (115), and an adjusting screw rod (218) is rotatably provided on the fixing seat (116) and is threadably matched with the lifting seat (217).

6. A mixing device for producing paint according to claim 5, characterized in that: The power switching assembly (4) comprises a bevel gear 1 (411) arranged on the large gear (114), a bevel gear 2 (412) is arranged on the adjusting screw rod (218), a bevel gear 3 (416) is slidably arranged on the mounting frame 1 (115), the bevel gear 3 (416) selectively meshes with the bevel gear 1 (411) or the bevel gear 2 (412), and a lifting sleeve (417) is rotatably arranged on the extending end of the bevel gear 3 (416), and a positioning assembly (5) is arranged on the mounting frame 1 (115) for controlling the lifting sleeve (417) to move up and down.

7. A mixing device for producing paints according to claim 6, characterized in that: The positioning assembly (5) comprises a support frame (511) fixedly provided at both ends of the mounting frame (115) and corresponding to the lifting sleeve (417); a connecting frame (512) is slidably provided on the inner side surface of the support frame (511) along its height direction; the opposite ends of the two connecting frames (512) are fixedly connected to the lifting sleeve (417); a support frame (513) is fixedly provided on the support frame (511) above the connecting frame (512); and the two support frames (513) are both hingedly connected to a swing rod (514). 14), the two connecting frames (512) are both hinged with a swing rod five (515), and the other ends of the swing rod four (514) and the swing rod five (515) are hinged to each other, each swing rod four (514) is hinged with a connecting arm (516), and the other ends of the connecting arms (516) at both ends are hinged to an adjustment seat (517), and an electric push rod (518) is fixedly provided on the support frame one (511) corresponding to the adjustment seat (517), and the movable end of the electric push rod (518) is fixedly connected to the adjustment seat (517).

8. A mixing device for producing paint according to claim 6 or 7, characterized in that: A motor (413) is provided on a mounting frame 1 (115) between bevel gear 1 (411) and bevel gear 2 (412); an output shaft end of the motor (413) is connected to a transmission shaft (414) via a universal joint; a rotating shaft (415) is provided on the universal joint at the other end of the transmission shaft (414); and bevel gear 3 (416) is connected to the rotating shaft (415).

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