CN224089302U - Energy-saving device of concrete mixer - Google Patents

Abstract

The utility model discloses an energy-saving device of a concrete mixer, and relates to the technical field of concrete mixing. The utility model comprises a stirring device and a power device, wherein the stirring device comprises a stirring barrel, the bottom of the stirring barrel is fixedly connected with a barrel base, the center of the top of the barrel base is rotationally connected with a fixed block, the top of the fixed block is fixedly connected with a protective shell, one part of the center of the protective shell is provided with a hole, the center of the protective shell is rotationally connected with a driven shaft, the outer surface of the driven shaft is fixedly connected with a plurality of stirring arms with different lengths, and a cleaning mechanism is arranged in front of the driven shaft. According to the utility model, the stirring mechanism is arranged, particularly when stirring concrete, the stirring arms with different lengths are connected to the driven shaft, the output end of the motor drives the stirring arms to rotate through the driven shaft, and the stirring arms with different lengths can stir the concrete at all positions in the stirring barrel when rotating and stirring, so that various raw materials of the concrete are more uniformly mixed, the stirring efficiency is higher, and the energy is further saved.

Description

Energy-saving device of concrete mixer

Technical Field

The utility model belongs to the technical field of concrete stirring, and particularly relates to an energy-saving device of a concrete mixer.

Background

Manual stirring of concrete is time-consuming and laborious, so that the concrete mixer is increasingly used in order to more efficiently complete the stirring work of the concrete.

Most of the existing concrete mixers are drum-type, when concrete is stirred, the drum is turned over to drive the concrete to fall freely, so that the concrete is continuously stirred, concrete raw materials are repeatedly turned over to be stirred, the raw material mixing efficiency is slower, the mixing uniformity is lower, long time is required for stirring, the consumption of energy sources is greatly increased, and therefore, an energy-saving device of the concrete mixer is provided.

Disclosure of utility model

The utility model aims to provide an energy-saving device of a concrete mixer, which is characterized in that a stirring mechanism is arranged, particularly when concrete is stirred, stirring arms with different lengths are connected to a driven shaft, the bottoms of the stirring arms are connected with a stirring bottom plate, the sides of the stirring arms are connected with scraping plates, the output end of a motor drives the stirring arms to rotate through the driven shaft, the concrete at all positions in a stirring barrel can be stirred when the stirring arms with different lengths rotate and stir, the scraping plates can scrape the concrete on the inner wall of the stirring barrel, the residual concrete on the inner wall of the stirring barrel is avoided, the mixing of various raw materials of the concrete is more uniform, the stirring efficiency is higher, the stirring time is shortened, the energy is further saved, the problem that the existing stirring efficiency is poorer, longer time is required for stirring, the consumption of energy is greatly increased, and after each stirring is completed, the concrete remains for a long time and is solidified and stuck on the inner wall, so that the next stirring efficiency is affected is solved.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

The utility model relates to an energy-saving device of a concrete mixer, which comprises a mixing device and a power device, wherein the mixing device comprises a mixing barrel, the bottom of the mixing barrel is fixedly connected with a barrel base, the bottom of the barrel base is fixedly connected with a plurality of column legs, the center of the top of the barrel base is rotationally connected with a fixed block, the top of the fixed block is fixedly connected with a protective shell, the center of the protective shell is provided with a first hole, the center of the protective shell is rotationally connected with a driven shaft, the outer surface of the driven shaft is fixedly connected with a plurality of mixing arms with different lengths, one side of the longer mixing arm, which is close to the mixing barrel, is fixedly connected with a scraping plate, the bottoms of the plurality of mixing arms are fixedly connected with a collision block, the tops of the mixing arms with different lengths, which are close to the driven shaft, are provided with cleaning mechanisms in front of the driven shaft, so that when the mixer mixes concrete raw materials, the concrete raw materials at different positions can be fully mixed, the mixing efficiency is improved, the mixing time is reduced, and the energy consumption of the equipment is further reduced.

Further, power device includes the tank tower, tank tower top and a section of thick bamboo base bottom fixedly connected with motor, tank tower bottom left side inner wall fixedly connected with motor top output fixedly connected with driving shaft, driving shaft top fixedly connected with gear one, gear one right side rotates and is connected with gear two, hole two has been seted up in gear two centers department, gear two is from central hole two and driven shaft fixed connection, hole two and driven shaft diameter looks adaptation, driven shaft bottom rotates and is connected with the supporting shoe, supporting shoe left side and motor right side fixed connection, tank tower left side fixedly connected with pump casing, inside oil pump and the water pump of containing of pump casing, pump casing left side fixedly connected with water inlet, pump casing right side fixedly connected with oil inlet, pump casing top is close to water inlet department and is provided with water spraying mechanism, pump casing top is close to oil inlet department and is provided with water spraying mechanism for equipment adds water and adds lubricating oil more convenient, has reduced artifical repeated water that adds, and equipment maintenance is more convenient.

Further, the cylinder base top is conical setting, cylinder base right side fixedly connected with discharge gate, discharge gate bottom fixedly connected with discharging pipe, discharging pipe right side fixedly connected with valve, conical cylinder base setting makes concrete raw materials more convenient when mixing to accomplish the ejection of compact, reduces the residual of raw materials in the bottom by a wide margin, is favorable to the clearance of equipment when having improved ejection of compact efficiency.

Further, driven shaft top fixedly connected with rotation axis, the contact of rotation axis top has the fixed plate, one side fixedly connected with collision head that the fixed plate bottom is close to the driven shaft, collision head bottom is the hemisphere setting, fixed plate bottom fixedly connected with brush shell, brush shell bottom fixedly connected with a plurality of brush, a plurality of the brush distributes in brush shell bottom with linear array's mode, and the collision piece drives the brush and shakes from top to bottom for when the stirring arm passes through the brush, the residual concrete raw materials on the more quick effectual clearance stirring arm.

Further, spout two has been seted up at agitator the place ahead top, two inner walls fixedly connected with spacing axle of agitator top spout, spacing axle left side and right side all with two inner walls fixed connection of spout, hole four has been seted up on the inside right side of fixed plate, the fixed plate right side is connected with spacing axle rotation through hole four, spacing axle and the four looks adaptations in fixed plate right side hole, and the fixed plate makes when the brush does not use with spacing axle looks adaptation, can drive the brush through the fixed plate and overturn outside the agitator, avoids the brush to influence the mixer work, makes equipment work more stable.

Further, pump casing top fixedly connected with water pipe frame, pump casing top water pipe frame's inner wall department fixedly connected with water pipe, the water pipe is connected with the inside water pump delivery port of pump casing, the water inlet is connected with the inside water pump water inlet of pump casing, a plurality of hole four has been seted up at the water pipe top, four internal fixedly connected with water jet of water pipe bottom hole, four looks adaptations in hole of water jet and water pipe are through setting up water spraying mechanism for it is more convenient to add water, also more convenient when clearing up the stirring frame simultaneously.

Further, the front part of the water pipe rack at the top of the pump casing is fixedly connected with an oil pipe, the inner wall of the oil pipe rack at the top of the pump casing is fixedly connected with an oil pipe, the top of the oil pipe is fixedly connected with a spray head, the top of the oil pipe is in threaded arrangement, the inner wall of the bottom of the spray head is in threaded arrangement, the top of the oil pipe is matched with the threads of the inner wall of the bottom of the spray head, the right side of the spray head is provided with a fifth hole, the fifth hole at the right side of the spray head is fixedly connected with an oil injection port, the oil injection port is matched with the fifth hole at the right side of the spray head, the right side of the oil injection port is provided with a sixth hole, the oil injection mechanism is arranged, and lubricating oil can be periodically added to a driven shaft, so that the rotation of the driven shaft is smoother, the running stability of equipment is improved, the service life of the equipment is further improved,

The utility model has the following beneficial effects:

1. According to the utility model, the stirring mechanism is arranged, particularly when concrete is stirred, the stirring arms with different lengths are connected to the driven shaft, the bottoms of the stirring arms are connected with the stirring bottom plate, the side edges of the stirring arms are connected with the scraping plates, the output end of the motor drives the stirring arms to rotate through the driven shaft, the concrete at all positions in the stirring barrel can be stirred when the stirring arms with different lengths are rotated for stirring, the concrete raw materials can be more uniformly mixed, the scraping plates can scrape the concrete on the inner wall of the stirring barrel, the residual concrete raw materials on the inner wall of the stirring barrel are avoided, the mixing of various raw materials of the concrete is more uniform, the stirring efficiency is higher, the stirring time is shortened, and the energy is further saved.

2. According to the utility model, the cleaning mechanism is arranged, specifically, after concrete stirring is completed, the brush shell is fixed at the bottom of the fixing plate through the screw, water enters from the water inlet through the pump shell, then the water is sprayed out through the water spraying port, residual concrete on the stirring arm is flushed by the water, and when the collision block is contacted with the collision head, the collision head drives the brush on the brush shell to vibrate up and down, so that the brush can clean the residual concrete on the stirring arm, the residual concrete is cleaned, further the next stirring is not influenced, manual cleaning by staff is not needed, and the cleaning is more convenient and energy-saving.

Of course, it is not necessary for any one product to practice the utility model to achieve all of the advantages set forth above at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of a stirring mechanism according to the present utility model;

FIG. 3 is a schematic view of a cleaning mechanism according to the present utility model;

FIG. 4 is a schematic view of a collision mechanism according to the present utility model;

FIG. 5 is a schematic view of a pipe structure according to the present utility model;

FIG. 6 is a schematic diagram of a fuel injection mechanism according to the present utility model.

In the drawings, the list of components represented by the various numbers is as follows:

1. Stirring device, 11, valve, 12, discharging pipe, 13, column leg, 14, cleaning mechanism, 141, fixing plate, 411, collision head, 142, limiting shaft, 143, brush shell, 144, brush, 145, collision block, 15, water spraying mechanism, 151, water inlet, 152, water spraying port, 153, water pipe, 154, water pipe rack, 16, oil spraying mechanism, 161, oil inlet, 162, oil pipe rack, 163, oil spraying port, 164, spray head, 165, oil pipe, 17, stirring barrel, 171, barrel base, 711, discharging port, 18, stirring mechanism, 181, scraping plate, 182, protective shell, 183, fixing block, 184, stirring arm, 185, stirring base plate, 2, power device, 21, box rack, 22, pump shell, 23, supporting block, 231, gear two, 232, driven shaft, 233, rotating shaft, 24, motor, 241, driving shaft, 242 and gear one.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-6, the utility model is an energy-saving device of a concrete mixer, comprising a mixing device 1 and a power device 2, wherein the mixing device 1 comprises a mixing drum 17, a drum base 171 is fixedly connected to the bottom of the mixing drum 17, a plurality of column legs 13 are fixedly connected to the bottom of the drum base 171, a fixed block 183 is rotatably connected to the center of the top of the drum base 171, a protective shell 182 is fixedly connected to the top of the fixed block 183, a hole I is formed in the center of the protective shell 182, a driven shaft 232 is rotatably connected to the center of the protective shell 182, a plurality of mixing arms 184 with different lengths are fixedly connected to the outer surface of the driven shaft 232, a scraper 181 is fixedly connected to one side of the longer mixing arm 184 close to the mixing drum 17, a mixing bottom plate 185 is fixedly connected to the bottom of the plurality of mixing arms 184, the top of a plurality of stirring arm 184 of different length is close to the equal fixedly connected with collision piece 145 of driven shaft 232 department, driven shaft 232 the place ahead is provided with clearance mechanism 14, through setting up rabbling mechanism, when concrete is stirred, the stirring arm of different length is connected on the driven shaft, stirring bottom plate is connected to the bottom of stirring arm, the scraper blade is connected to stirring arm side, the motor output drives the stirring arm through the driven shaft and rotates, can stir the concrete of all positions in the agitator when the rotatory stirring of stirring arm of different length, can make the more even that concrete raw materials mixes, the scraper blade can scrape the concrete on the agitator inner wall down, avoid remaining concrete raw materials on the agitator inner wall for the more even that various raw materials of concrete mix, stirring efficiency is higher, make stirring time reduce, further energy saving.

The power device 2 comprises a box frame 21, the top of the box frame 21 is fixedly connected with the bottom of a cylinder base 171, a motor 24 is fixedly connected to the left inner wall of the bottom of the box frame 21, the output end of the top of the motor 24 is fixedly connected with a driving shaft 241, the top of the driving shaft 241 is fixedly connected with a first gear 242, the right side of the first gear 242 is rotationally connected with a second gear 231, a hole II is formed in the center of the second gear 231, the second gear 231 is fixedly connected with a driven shaft 232 from the center hole II, the hole II is matched with the diameter of the driven shaft 232, a supporting block 23 is rotationally connected to the bottom of the driven shaft 232, the left side of the supporting block 23 is fixedly connected with the right side of the motor 24, a pump casing 22 is fixedly connected with a pump casing 22, an oil pump and a water pump are contained in the pump casing 22, a water inlet 151 is fixedly connected to the left side of the pump casing 22, an oil inlet 161 is formed in the position, close to the water inlet 151, and a fuel injection mechanism 16 is arranged at the top of the pump casing 22, close to the oil inlet 161.

The top of the barrel base 171 is conical, the right side of the barrel base 171 is fixedly connected with a discharge hole 711, the bottom of the discharge hole 711 is fixedly connected with a discharge pipe 12, and the right side of the discharge pipe 12 is fixedly connected with a valve 11.

The driven shaft 232 top fixedly connected with rotation axis 233, rotation axis 233 top contact has fixed plate 141, one side fixedly connected with collision head 411 that the fixed plate 141 bottom is close to driven shaft 232, collision head 411 bottom is the hemisphere setting, fixed plate 141 bottom fixedly connected with brush shell 143, brush shell 143 bottom fixedly connected with a plurality of brush 144, a plurality of brush 144 distributes in brush shell 143 bottom with linear array's mode, through setting up cleaning device, specifically after the concrete stirring is accomplished, pass through screw fixation fixed plate bottom to the brush shell, then make water get into from the water inlet through the pump casing, then spout through the water spray mouth, wash residual concrete on the stirring arm with water, when collision piece and collision head contact, the brush vibrations about the collision bandeau on the brush shell, make the brush can clear up residual concrete on the stirring arm, clean up residual concrete, and then can not influence stirring next time, no longer need the manual clearance of staff, it is more convenient and energy-conserving.

A second chute is formed in the top of the front part of the stirring barrel 17, a limiting shaft 142 is fixedly connected to the inner wall of the second chute of the top part of the stirring barrel 17, the left side and the right side of the limiting shaft 142 are fixedly connected with the inner wall of the second chute, a fourth hole is formed in the right side of the inner part of the fixing plate 141, the right side of the fixing plate 141 is rotationally connected with the limiting shaft 142 through the fourth hole, and the limiting shaft 142 is in four-phase adaptation with the right hole of the fixing plate 141.

The top of the pump casing 22 is fixedly connected with a water pipe frame 154, the inner wall of the water pipe frame 154 at the top of the pump casing 22 is fixedly connected with a water pipe 153, the water pipe 153 is connected with a water pump outlet inside the pump casing 22, the water inlet 151 is connected with a water pump inlet inside the pump casing 22, the top of the water pipe 153 is provided with a plurality of holes IV, the holes IV at the bottom of the water pipe 153 are fixedly connected with a plurality of water spraying ports 152, and the water spraying ports 152 are matched with the holes IV of the water pipe 153.

The place ahead fixedly connected with tubing frame 162 of pump casing 22 top water pipe support 154, pump casing 22 top tubing frame 162 inner wall department fixedly connected with oil pipe 165, oil pipe 165 top fixedly connected with shower nozzle 164, oil pipe 165 top is the screw thread setting, shower nozzle 164 bottom inner wall is the screw thread setting, the screw thread looks adaptation of oil pipe 165 top and shower nozzle 164 bottom inner wall has been seted up on the shower nozzle 164 right side, the five fixedly connected with oil spout 163 of hole on shower nozzle 164 right side, oil spout 163 and the five looks adaptations of shower nozzle 164 right side hole, a plurality of holes six have been seted up on oil spout 163 right side.

One specific application of this embodiment is:

After the concrete is added, the motor 24 is started, the output end of the motor 24 drives the driving shaft 241 to rotate, the driving shaft 241 drives the gear one 242 to rotate, the gear one 242 further drives the driven shaft 232 to rotate, the driven shaft 232 drives the stirring arms 184 with different lengths to rotate, the stirring arms 184 drive the stirring bottom plate 185 and the scraping plate 181 to rotate, the stirring mechanism 18 continuously stirs the concrete to enable various raw materials of the concrete to be mixed together, the stirring arms 184 with different lengths can enable the raw materials to be mixed more quickly and further save energy, meanwhile, the pump shell 22 is started, the water inlet 151 is connected with a water source, the pump shell 22 enables water to be sprayed out from the water spraying port 152 through the water pipe 153, a certain proportion of water is added according to the mass of the added concrete, the water is not needed to be added into the mixer manually, the mixer is more labor-saving, the pump shell 22 can be started in the operation of the mixer according to the same principle, the oil spraying port 163 sprays lubricating oil to the joint between the driven shaft 232 and the top of the fixed block 183, so that the driven shaft 232 rotates more smoothly, the stirring mechanism 18 stirs more efficiently, the equipment is more energy-saving, after the concrete stirring is finished, the valve 11 is opened, the cylinder base 171 is a base with a gradient, the stirring base plate 185 drives the concrete to continuously flow out of the discharge port 711, when the discharge port 711 does not flow out of the concrete any more, the pump shell 22 is opened, the water inlet 151 is connected with a water source, the water is sprayed into the stirring barrel 17 from the water spraying port 152 through the water pipe 153, residual concrete on the stirring mechanism 18 is flushed, the fixed plate 141 and the hairbrush 144 are overturned above the stirring barrel 17, the bottom of the fixed plate 141 contacts with the rotating shaft 233, the collision block 145 is driven to rotate when the driven shaft 232 rotates, the collision block 145 collides with the collision head 411 at the bottom of the fixed plate 141, the hemispherical collision head 411 moves upwards when colliding with the collision block 145, then, the gravity descends, and the brush 144 is driven to vibrate up and down, so that concrete on the stirring arm 184, the stirring bottom plate 185, the stirring arm two 186 and the stirring arm three 187 is cleaned, the condition that the follow-up use is affected by agglomeration caused by concrete residue is avoided, the equipment is more efficient when stirring the concrete again, and the equipment is more energy-saving.

In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the utility model disclosed above are intended only to assist in the explanation of the utility model. The preferred embodiments are not intended to be exhaustive or to limit the utility model to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model. The utility model is limited only by the claims and the full scope and equivalents thereof.

Claims (7)

1. The utility model provides an economizer of concrete mixer, includes agitating unit (1) and power device (2), agitating unit (1) is including agitator (17), a serial communication port, agitator (17) bottom fixedly connected with barrel base (171), barrel base (171) bottom fixedly connected with a plurality of post leg (13), barrel base (171) top center department rotates and is connected with fixed block (183), fixed block (183) top fixedly connected with protective housing (182), hole one has been seted up at protective housing (182) center, hole one department rotation is seted up at protective housing (182) center and is connected with driven shaft (232), driven shaft (232) surface fixedly connected with a plurality of different length stirring arm (184), longer stirring arm (184) are close to agitator (17) one side department fixedly connected with scraper blade (181), a plurality of stirring arm (184) bottom fixedly connected with stirring bottom plate (185), a plurality of different length stirring arm (184) top is close to (232) equal fixedly connected with collision piece (145) of driven shaft (232), driven shaft (232) place ahead is provided with clearance mechanism (14).

2. The energy-saving device of the concrete mixer according to claim 1, wherein the power device (2) comprises a box frame (21), the top of the box frame (21) is fixedly connected with the bottom of a barrel base (171), a motor (24) is fixedly connected with the left inner wall of the bottom of the box frame (21), a driving shaft (241) is fixedly connected with the output end of the top of the motor (24), a first gear (242) is fixedly connected with the top of the driving shaft (241), a second gear (231) is rotatably connected with the right side of the first gear (242), a second hole is formed in the center of the second gear (231), the second gear (231) is fixedly connected with a driven shaft (232) from the second hole, the second hole is matched with the diameter of the driven shaft (232), a supporting block (23) is rotatably connected with the bottom of the driven shaft (232), the left side of the supporting block (23) is fixedly connected with the right side of the motor (24), a pump casing (22) is fixedly connected with the left side of the box frame (21), the inside of the pump (22) comprises an oil pump and a water pump (22), the water inlet (151) is fixedly connected with the water inlet (151) of the pump (22), an oil injection mechanism (16) is arranged at the top of the pump casing (22) close to the oil inlet (161).

3. The energy-saving device of the concrete mixer according to claim 2, wherein the top of the barrel base (171) is conical, a discharge hole (711) is fixedly connected to the right side of the barrel base (171), a discharge pipe (12) is fixedly connected to the bottom of the discharge hole (711), and a valve (11) is fixedly connected to the right side of the discharge pipe (12).

4. An energy-saving device for a concrete mixer according to claim 3, wherein the top of the driven shaft (232) is fixedly connected with a rotating shaft (233), the top of the rotating shaft (233) is contacted with a fixed plate (141), one side of the bottom of the fixed plate (141) close to the driven shaft (232) is fixedly connected with a collision head (411), the bottom of the collision head (411) is arranged in a hemispherical shape, the bottom of the fixed plate (141) is fixedly connected with a brush shell (143), the bottom of the brush shell (143) is fixedly connected with a plurality of brushes (144), and the plurality of brushes (144) are distributed at the bottom of the brush shell (143) in a linear array manner.

5. The energy-saving device of a concrete mixer according to claim 4, wherein a second chute is formed in the top of the front part of the mixing drum (17), a limiting shaft (142) is fixedly connected to the second inner wall of the second chute in the top of the mixing drum (17), the left side and the right side of the limiting shaft (142) are fixedly connected to the second inner wall of the chute, a fourth hole is formed in the right side of the inside of the fixing plate (141), the right side of the fixing plate (141) is rotationally connected with the limiting shaft (142) through the fourth hole, and the limiting shaft (142) is in four-phase fit with the fourth hole in the right side of the fixing plate (141).

6. The energy-saving device of a concrete mixer according to claim 5, wherein a water pipe frame (154) is fixedly connected to the top of the pump casing (22), a water pipe (153) is fixedly connected to the inner wall of the water pipe frame (154) at the top of the pump casing (22), the water pipe (153) is connected with a water pump outlet inside the pump casing (22), the water inlet (151) is connected with a water pump inlet inside the pump casing (22), a plurality of holes IV are formed in the top of the water pipe (153), a plurality of water spraying ports (152) are fixedly connected to the holes IV at the bottom of the water pipe (153), and the water spraying ports (152) are matched with the holes IV of the water pipe (153).

7. The energy-saving device of a concrete mixer according to claim 6, wherein an oil pipe frame (162) is fixedly connected to the front of a water pipe frame (154) at the top of the pump casing (22), an oil pipe (165) is fixedly connected to the inner wall of the oil pipe frame (162) at the top of the pump casing (22), a nozzle (164) is fixedly connected to the top of the oil pipe (165), the top of the oil pipe (165) is in threaded arrangement, the inner wall at the bottom of the nozzle (164) is in threaded arrangement, the top of the oil pipe (165) is in threaded adaptation with the inner wall at the bottom of the nozzle (164), a five-hole is formed in the right side of the nozzle (164), an oil injection port (163) is fixedly connected to the five-hole-five-phase hole of the right side of the nozzle (164), and a plurality of six-hole-holes are formed in the right side of the oil injection port (163).