阅读说明：本技术 一种新型无动力压草打浆机 (Novel unpowered grass pressing and beating machine ) 是由 刘凯 徐林贵 卞景阳 丛春有 尉井顺 吴屹立 韩冰 谢宝华 牟善华 于 2020-11-04 设计创作，主要内容包括：一种新型无动力压草打浆机,包括水平板、两组连接板组,水平板底面开设两条放置槽,两条放置槽分别位于水平板的两侧,每天放置槽内配合设有一组移动装置,移动装置的底端配合连接移动板的顶面,两个盒体的相背端分别开设第一透槽,第一透槽内配合设有转轴,第四伞齿轮与第三伞齿轮啮合配合。通过本发明可以进行不同情形的旋耕操作,满足不同的旋耕处理,而且无需分别购买单轴打浆机、双轴打浆机,节省成本,并且在旋耕操作时,也无需对单轴打浆机与双轴打浆机进行更换,操作简单,避免农民劳累,而且在不使用时,可以将同一组连接板组中的其中一块连接板翻折,避免占用较多空间,并在旋耕操作时,也能够根据需要选择不同长度的刀轴。(The utility model provides a novel unpowered grass beating machine of pressing, includes horizontal plate, two sets of connecting plate groups, and two standing grooves are seted up to the horizontal plate bottom surface, and two standing grooves are located the both sides of horizontal plate respectively, and the standing groove fit is equipped with a set of mobile device every day, and the top surface of movable plate is connected in mobile device's bottom cooperation, and the back of the body end of carrying on the back of the body of two boxes is seted up first groove that passes through respectively, and first inslot cooperation that passes through is equipped with the pivot, fourth bevel gear and third bevel gear meshing cooperation. The rotary tillage machine can carry out rotary tillage operation in different situations, meets different rotary tillage treatment, does not need to purchase a single-shaft beater and a double-shaft beater respectively, saves cost, does not need to replace the single-shaft beater and the double-shaft beater during rotary tillage operation, is simple to operate, avoids fatigue of farmers, can turn over one connecting plate in the same group of connecting plate groups when not used, avoids occupying more space, and can select cutter shafts with different lengths as required during rotary tillage operation.)

1. The utility model provides a novel unpowered grass pressing beating machine which characterized in that: comprises a horizontal plate (1) and two groups of connecting plate groups, wherein two placing grooves (2) are formed in the bottom surface of the horizontal plate (1), the two placing grooves (2) are respectively positioned at two sides of the horizontal plate (1), a group of moving devices are arranged in the placing grooves (2) every day in a matching way, the bottom ends of the moving devices are connected with the top surface of a moving plate (3) in a matching way, first multi-stage telescopic rods (4) are fixedly installed at the bottom ends of the moving plate (3), the extending directions of the two first multi-stage telescopic rods (4) are opposite, vertical telescopic rods (5) are respectively and fixedly installed at the opposite ends of the two first multi-stage telescopic rods (4), a waterproof motor (6) is fixedly installed at the bottom end of each telescopic rod (5), the two waterproof motors (6) are positioned between the two groups of connecting plate groups, each group of connecting plate groups comprises two connecting plates (7), a connecting block (8) and, one side of one connecting plate (7) in the same connecting plate group is fixedly connected with the connecting block (8), the other side of the connecting plate is fixedly connected with the corresponding waterproof motor (6), one side of the other connecting plate (7) in the same connecting plate group is hinged with the connecting block (8), the second multi-stage telescopic rods (9) are arranged on the top surface of the connecting block (8), the extending directions of the two second multi-stage telescopic rods (9) are opposite, the top surface of the other connecting plate (7) is provided with a sliding chute (10) with a dovetail-shaped cross section, a sliding block (11) with a dovetail-shaped cross section is arranged in the sliding chute (10) in a matching way, the top end of the sliding block (11) is hinged with one end of a connecting rod (12), the other end of the connecting rod (12) is hinged with one end of the corresponding second multi-stage telescopic rod (9), and a vertical rod group is fixedly arranged at the bottom end of each connecting, a hood (13) is fixedly installed at the bottom end of each vertical rod group, an installation cutter shaft is arranged in the hood (13) in a matching way, through holes (14) are respectively formed at the opposite ends of two cutter shafts positioned below the same group of connecting plate groups, a plurality of grooves (15) are formed in the inner wall of one through hole (14) of the two through holes (14) positioned below the same group of connecting plate groups, one end of each groove is communicated with the outside, two waterproof telescopic rods (16) are fixedly installed in the other through hole (14) of the two through holes (14) positioned below the same group of connecting plate groups, one ends of the two waterproof telescopic rods (16) are fixedly connected through a circular ring (17), a plurality of insert blocks (18) are fixedly installed on the periphery of the circular ring (17), the circular ring (17) can enter the through holes (14), the insert blocks (18) can be inserted into the corresponding grooves (15), a box body (19) is arranged below, the box bodies (19) are fixedly installed on one side of the hood (13), first through grooves are formed in the back end portions of the two box bodies (19) respectively, rotating shafts (20) are arranged in the first through grooves in a matched mode, the back end portions of the two rotating shafts (20) are fixedly connected with corresponding cutter shafts respectively, first bevel gears (21) are fixedly installed at opposite ends of the two rotating shafts (20) respectively, second through grooves (22) are formed in the top ends of the box bodies (19), connecting shafts (23) are arranged in the second through grooves (22) in a matched mode, second bevel gears (24) are fixedly installed at the bottom ends of the connecting shafts (23), the second bevel gears (24) are located in the box bodies (19) and are matched with the first bevel gears (21) in a meshed mode, third bevel gears (25) are fixedly installed at the top ends of the connecting shafts (23), fourth bevel gears (26) are fixedly installed at the end portions of output shafts of waterproof motors, and the fourth.

2. The novel unpowered grass pressing and beating machine as claimed in claim 1, wherein: the movable device comprises a screw rod (27), a polished rod (28), a nut and a power transmission device, wherein the screw rod (27) is fixedly connected with the polished rod (28), one end of the polished rod (28) is movably connected with the inner wall of one side of the placing groove (2), one end of the screw rod (27) is fixedly connected with the inner wall of the other side of the placing groove (2), the screw rod (27) is in threaded fit with the nut, the top surface of the movable plate (3) is fixedly connected with the bottom end of the nut, the power transmission device drives the two sets of movable devices to rotate, and the screw threads of the screw rods (27) in the two sets of movable devices.

3. The novel unpowered grass pressing and beating machine as claimed in claim 2, wherein: the power transmission device is composed of two chain wheels (30) and a chain, wherein a long groove (31) is formed in the bottom end of the horizontal plate (1), the long groove (31) is located between the two placing grooves (2) and communicated with the inside of the placing grooves (2), one chain wheel (30) is installed at one end of the polished rod (28) in one placing groove (2), the other chain wheel (30) is installed at the other end of the screw rod (27) in the other placing groove (2), the two chain wheels (30) are movably connected through the chain, and the chain is located in the long groove (31).

4. The novel unpowered grass pressing and beating machine as claimed in claim 2, wherein: the diameter of the polish rod (28) is larger than that of the screw rod (27).

5. The novel unpowered grass pressing and beating machine as claimed in claim 1, wherein: the vertical rod group is composed of at least two vertical rods (29).

Technical Field

The invention belongs to the technical field of agricultural machinery, and particularly relates to a novel unpowered grass pressing and beating machine.

Background

The southern climate in China is humid and hot, rainwater is abundant, the main cultivated land is a paddy field, crops mainly comprise paddy rice, the paddy field needs to be beaten before transplanting, and the presence of a paddy field beater brings great convenience for beating and leveling operation of the paddy field, lowers the paddy field tillage cost, and increases yield and efficiency; the existing paddy field beater generally has wider width to ensure higher working efficiency, but the width is too wide, so that the paddy field beater is very inconvenient to transport and has larger potential safety hazard; and the width is too narrow, the working efficiency of the paddy field beater is very low, and the time and energy are wasted.

Disclosure of Invention

The invention provides a novel unpowered grass pressing and beating machine, which is used for overcoming the defects in the prior art.

The invention is realized by the following technical scheme:

a novel unpowered grass pressing and beating machine comprises a horizontal plate and two groups of connecting plate groups, wherein two placing grooves are formed in the bottom surface of the horizontal plate and are respectively positioned on two sides of the horizontal plate, a group of moving devices are arranged in the placing grooves every day in a matched mode, the bottom ends of the moving devices are connected with the top surface of a moving plate in a matched mode, first multi-stage telescopic rods are fixedly installed at the bottom ends of the moving plate, the extending directions of the two first multi-stage telescopic rods are opposite, vertical telescopic rods are fixedly installed at the opposite ends of the two first multi-stage telescopic rods respectively, a waterproof motor is fixedly installed at the bottom end of each telescopic rod and is positioned between the two groups of connecting plate groups, each group of connecting plate group comprises two connecting plates, a connecting block and a second multi-stage telescopic rod, the connecting block is positioned between the two connecting plates, one side of one connecting plate in the same group, one side of the other connecting plate in the same connecting plate group is hinged with the connecting block, the second multi-stage telescopic rods are arranged on the top surface of the connecting block, the extending directions of the two second multi-stage telescopic rods are opposite, the top surface of the other connecting plate is provided with a sliding chute with a dovetail-shaped cross section, a sliding block with a dovetail-shaped cross section is arranged in the sliding chute in a matching way, the top end of the sliding block is hinged with one end of a connecting rod, the other end of the connecting rod is hinged with one end of a corresponding second multi-stage telescopic rod, a vertical rod group is fixedly arranged at the bottom end of each connecting plate, a hood is fixedly arranged at the bottom end of each vertical rod group, a mounting cutter shaft is arranged in the hood in a matching way, the opposite ends of the two cutter shafts below the same connecting plate group are respectively provided with a through hole, the inner wall of one of the, two waterproof telescopic rods are fixedly arranged in the other through hole in the two through holes positioned below the same group of connecting plate groups, one ends of the two waterproof telescopic rods are fixedly connected through a ring, a plurality of insert blocks are fixedly arranged on the periphery of the ring and can enter the through holes, the insert blocks can be inserted into corresponding grooves, a box body is arranged below the waterproof motor in a matched manner and is fixedly arranged on one side of the hood, first through grooves are respectively formed in the opposite ends of the two box bodies, rotating shafts are arranged in the first through grooves in a matched manner, the opposite ends of the two rotating shafts are respectively fixedly connected with corresponding cutter shafts, first bevel gears are respectively fixedly arranged at the opposite ends of the two rotating shafts, a second through groove is formed in the top end of the box body, a connecting shaft is arranged in the second through groove in a matched manner, a second bevel gear is fixedly arranged at the bottom end of the connecting shaft and is positioned in the, the top end of the connecting shaft is fixedly provided with a third bevel gear, the end part of an output shaft of the waterproof motor is fixedly provided with a fourth bevel gear, and the fourth bevel gear is meshed and matched with the third bevel gear.

As above a novel unpowered grass beating machine of pressing, the mobile device constitute by screw rod, polished rod, nut, power transmission device, screw rod and polished rod fixed connection, the one end of polished rod and one side inner wall swing joint of standing groove, the one end of screw rod and the opposite side inner wall fixed connection of standing groove, screw rod and nut screw-thread fit, the bottom fixed connection of shifting board top surface and nut, power transmission device drive two sets of mobile device and rotate, the screw rod screw thread in two sets of mobile device is opposite.

As above, the power transmission device is composed of two chain wheels and a chain, the bottom end of the horizontal plate is provided with a long groove, the long groove is positioned between the two placing grooves and communicated with the inside of the placing grooves, one chain wheel is arranged at one end of a polished rod in one placing groove, the other chain wheel is arranged at the other end of a screw rod in the other placing groove, the two chain wheels are movably connected through the chain in front, and the chain is positioned in the long groove.

According to the novel unpowered grass pressing and beating machine, the diameter of the polished rod is larger than that of the screw rod.

The novel unpowered grass pressing and beating machine is characterized in that the vertical rod group is composed of at least two vertical rods.

The invention has the advantages that: the method comprises the following steps that a horizontal plate is arranged on a power moving device, such as the rear part of a tractor, when a single-shaft beater is needed, the moving device is positioned in the middle of a placing groove, two moving devices are both arranged on the same horizontal axis, cutter shafts are arranged on the same horizontal axis at the moment, then a waterproof telescopic rod extends, a circular ring is pushed into a through hole in the other cutter shaft, an inserting block is inserted into a groove, a waterproof motor works, a third bevel gear is meshed and matched with a fourth bevel gear, a second bevel gear is meshed and matched with a first bevel gear to drive a rotating shaft to rotate, and the rotating shaft is connected with the cutter shafts, so that two cutter shaft rotating shafts under the same connecting plate group can be driven to carry out rotary tillage; when the cutter shafts with longer length are not needed, the waterproof telescopic rods are contracted, the circular rings are moved out of the other cutter shaft, then the first multi-stage telescopic rods are contracted, the first multi-stage telescopic rods are hinged with the connecting rods, the connecting rods are hinged with the sliding blocks, the sliding blocks are positioned in the sliding grooves, the connecting plates in the same connecting plate group can be turned over by taking the hinge points as centers, namely the two connecting plates in the same connecting plate group are mutually perpendicular, and rotary tillage operation is carried out through the cutter shafts with short distance; when the double-shaft beater is needed, the moving devices move, the moving directions of the two moving devices are opposite, after the movement is finished, the second multi-stage telescopic rod extends to drive the waterproof motor and the one connecting plate group to move, at the moment, the two connecting plate groups are arranged front and back, namely, cutter shafts under the two connecting plate groups are arranged front and back, so that the double-shaft beater is formed, and in the situation that the double-shaft beater is needed, the cutter shafts do not need to be long, at the moment, the first multi-stage telescopic rod can perform contraction operation, and one connecting plate in the one connecting plate group is turned over; the rotary tillage machine can carry out rotary tillage operation in different situations, meets different rotary tillage treatment, does not need to purchase a single-shaft beater and a double-shaft beater respectively, saves cost, does not need to replace the single-shaft beater and the double-shaft beater during rotary tillage operation, is simple to operate, avoids fatigue of farmers, can turn over one connecting plate in the same group of connecting plate groups when not used, avoids occupying more space, and can select cutter shafts with different lengths as required during rotary tillage operation.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention; FIG. 2 is an enlarged view of view A of FIG. 1; FIG. 3 is an enlarged view of a portion I of FIG. 1; FIG. 4 is a partial enlarged view of II of FIG. 1; FIG. 5 is a partial enlarged view of III of FIG. 1; FIG. 6 is a partial enlarged view of IV of FIG. 2; fig. 7 is a partial enlarged view of V of fig. 2.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A novel unpowered grass pressing and beating machine comprises a horizontal plate 1 and two groups of connecting plate groups, wherein two placing grooves 2 are formed in the bottom surface of the horizontal plate 1, the two placing grooves 2 are respectively positioned on two sides of the horizontal plate 1, a group of moving devices are arranged in the placing grooves 2 every day in a matching mode, the bottom ends of the moving devices are connected with the top surface of a moving plate 3 in a matching mode, first multi-stage telescopic rods 4 are fixedly installed at the bottom ends of the moving plate 3, the extending directions of the two first multi-stage telescopic rods 4 are opposite, vertical telescopic rods 5 are respectively and fixedly installed at the opposite ends of the two first multi-stage telescopic rods 4, a waterproof motor 6 is fixedly installed at the bottom end of each telescopic rod 5, the two waterproof motors 6 are positioned between the two groups of connecting plate groups, each group of connecting plate groups comprises two connecting plates 7, a connecting block 8 and a second multi-stage telescopic rod 9, the connecting block 8 is positioned between, the other side of the connecting plate is fixedly connected with a corresponding waterproof motor 6, one side of another connecting plate 7 in the same connecting plate group is hinged with the connecting block 8, a second multi-stage telescopic rod 9 is arranged on the top surface of the connecting block 8, the extending directions of the two second multi-stage telescopic rods 9 are opposite, the top surface of the other connecting plate 7 is provided with a sliding groove 10 with a dovetail-shaped cross section, a sliding block 11 with a dovetail-shaped cross section is arranged in the sliding groove 10 in a matching way, the top end of the sliding block 11 is hinged with one end of a connecting rod 12, the other end of the connecting rod 12 is hinged with one end of the corresponding second multi-stage telescopic rod 9, the other connecting plate 7 is the connecting plate 7 hinged with the connecting block 8 and is positioned on the outer side, namely the connecting plate hinged with the connecting block 8 in the connecting plate group on the left side is positioned on the left side, the connecting plate 7 hinged with the connecting block, the bottom end of each vertical rod group is fixedly provided with a hood 13, a mounting cutter shaft is arranged in the hood 13 in a matching way, the periphery of the cutter shaft is provided with a spiral blade, the connection mode of the cutter shaft and the hood 13 is known in the prior art, so detailed description is not repeated in the application, the opposite ends of the two cutter shafts positioned below the same connecting plate group are respectively provided with a through hole 14, the inner wall of one through hole 14 of the two through holes 14 positioned below the same connecting plate group is provided with a plurality of grooves 15, the plurality of grooves 15 are uniformly distributed by taking the circle center of the through hole 14 as the center, one end of each groove is communicated with the outside, two waterproof telescopic rods 16 are fixedly arranged in the other through hole 14 of the two through holes 14 positioned below the same connecting plate group, one ends of the two waterproof telescopic rods 16 are fixedly connected by a circular ring 17, the periphery of the circular ring 17 is fixedly provided with a plurality of, the circular ring 17 can enter the through hole 14, the insert block 18 can be inserted into a corresponding groove 15, two cutter shafts positioned below the same group of connecting plate groups can synchronously rotate at the moment, a box body 19 is arranged below the waterproof motor 6 in a matched manner, the box body 19 is fixedly arranged at one side of each hood 13, the two box bodies 19 are positioned between the two middle hoods 13, the opposite ends of the two box bodies 19 are respectively provided with a first through groove, a rotating shaft 20 is arranged in the first through grooves in a matched manner, the opposite ends of the two rotating shafts 20 are respectively fixedly connected with a corresponding cutter shaft, the opposite ends of the two rotating shafts 20 are respectively fixedly provided with a first bevel gear 21, each first bevel gear 21 is positioned in a corresponding box body 19, the top end of each box body 19 is provided with a second through groove 22, a connecting shaft 23 is arranged in the second through groove 22 in a matched manner, the bottom end of the connecting shaft 23 is fixedly provided with a second bevel gear 24, the second bevel, a third bevel gear 25 is fixedly arranged at the top end of the connecting shaft 23, a fourth bevel gear 26 is fixedly arranged at the end part of an output shaft of the waterproof motor, and the fourth bevel gear 26 is meshed and matched with the third bevel gear 25. The horizontal plate 1 is arranged on a power moving device, such as the rear part of a tractor, when a single-shaft beater is needed, the moving device is positioned in the middle of a placing groove 2, two moving devices are both arranged on the same horizontal axis, a cutter shaft is positioned on the same horizontal axis, then a waterproof telescopic rod 16 extends, a circular ring 17 is pushed into a through hole 14 in another cutter shaft, an inserting block 18 is inserted into a groove 15, a waterproof motor 6 works, a third bevel gear 25 is meshed and matched with a fourth bevel gear 26, a second bevel gear 24 is meshed and matched with a first bevel gear 21 to drive a rotating shaft 20 to rotate, the rotating shaft 20 is connected with the cutter shaft, and then two cutter shaft rotating shafts under the same connecting plate group can be driven to carry out rotary tillage treatment on a paddy field; when a long cutter shaft is not needed, the waterproof telescopic rod 16 is contracted, the circular ring 17 is moved out of the other cutter shaft, then the first multi-stage telescopic rod 4 is contracted, the first multi-stage telescopic rod 4 is hinged with the connecting rod 12, the connecting rod 12 is hinged with the sliding block 11, and the sliding block 11 is positioned in the sliding groove 10, so that the connecting plates 7 in the same connecting plate group can be turned over by taking a hinge point as a center, namely the two connecting plates 7 in the same connecting plate group are in a mutually perpendicular state, and rotary tillage operation is carried out through the cutter shaft with short distance; when the double-shaft beater is needed, the moving devices move, the moving directions of the two moving devices are opposite, after the movement is finished, the second multi-stage telescopic rod 9 extends to drive the waterproof motor 6 and the connecting plate groups to move, at the moment, the two connecting plate groups are arranged front and back, namely, cutter shafts under the two connecting plate groups are arranged front and back, the double-shaft beater is formed, and in the situation that the double-shaft beater is needed, the cutter shafts do not need to be long, at the moment, the first multi-stage telescopic rod 4 can perform contraction operation, and one connecting plate 7 in one connecting plate group is turned over; the rotary tillage machine can carry out rotary tillage operation in different situations, meets different rotary tillage treatment, does not need to purchase a single-shaft beater and a double-shaft beater respectively, saves cost, does not need to replace the single-shaft beater and the double-shaft beater during rotary tillage operation, is simple to operate, avoids fatigue of farmers, can turn over one connecting plate 7 in the same group of connecting plate groups when not used, avoids occupying more space, and can select cutter shafts with different lengths as required during rotary tillage operation.

Specifically, the moving device described in this embodiment is composed of a screw rod 27, a polished rod 28, a nut, and a power transmission device, the screw rod 27 is fixedly connected to the polished rod 28, one end of the polished rod 28 is movably connected to an inner wall of one side of the placement groove 2, one end of the screw rod 27 is fixedly connected to an inner wall of the other side of the placement groove 2, the screw rod 27 is in threaded fit with the nut, the top surface of the moving plate 3 is fixedly connected to the bottom end of the nut, the power transmission device drives the two sets of moving devices to rotate, and the screw threads of the screw rods. The installation directions of the polish rod 28 and the screw 27 of the two groups of moving devices are as follows: the polish rod 28 in the left placing groove 2 is positioned in front of the screw 27, and the polish rod 28 in the right placing groove 2 is positioned behind the screw; the waterproof forward and reverse rotating motor is installed in the placing groove 2 on the left side, an output shaft of the waterproof forward and reverse rotating motor is fixedly connected with one end of the polished rod, the polished rod 28 and the screw 27 can be driven to rotate, the nut is fixedly connected with the movable plates 3, the two movable plates 3 can move in opposite directions, and the single-shaft pulping machine is changed into the double-shaft pulping machine.

Specifically, the power transmission device according to the present embodiment is composed of two chain wheels 30 and a chain, wherein the bottom end of the horizontal plate 1 is provided with a long groove 31, the long groove 31 is located between the two placing grooves 2 and is communicated with the inside of the placing grooves 2, one chain wheel 30 is installed at one end of the polish rod 28 in one of the placing grooves 2, the other chain wheel 30 is installed at the other end of the screw 27 in the other placing groove 2, the two chain wheels 30 are movably connected by the chain, and the chain is located in the long groove 31. The placing grooves 2 are perpendicular to the strip grooves 31, the polished rod 28 with the motor rotates, the polished rod 28 and the screw 27 in the other placing groove 2 can be driven to rotate through the matching of the chain wheel 30 and the chain, and the structure is simple.

Further, the diameter of the polish rod 28 is larger than the diameter of the screw 27 in this embodiment. The diameter of polished rod 28 is greater than the diameter of screw rod 27, can avoid the nut to move to polished rod 28 on to also prescribe a limit to the displacement distance of nut, promptly when needing unipolar beating machine, two nuts are located same horizontal axis, when needing biaxial beating machine, two nuts move to opposite direction, and two first multistage telescopic link 4 extend, become two sets of link plate group tandem arrangement mode, become the biaxial beating machine this moment.

Furthermore, the set of vertical rods in this embodiment is composed of at least two vertical rods 29. The bottom ends of the vertical rods 29 are fixedly connected with the top end of the hood 13, the top ends of the vertical rods 29 are fixedly connected with the bottom end of the connecting plate, and at least two vertical rods 29 can enable the connection to be firm.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.