CN210017315U

CN210017315U - Planting device for soilless culture vegetables

Info

Publication number: CN210017315U
Application number: CN201920293005.6U
Authority: CN
Inventors: 韩永萍
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-03-08
Filing date: 2019-03-08
Publication date: 2020-02-07
Anticipated expiration: 2029-03-08

Abstract

The utility model discloses a soilless culture is planting device for vegetables relates to farming technical field, and it includes the base, the last fixed surface of base is connected with the storage water tank, the inside of storage water tank is provided with the drinking-water pipe, the top of drinking-water pipe is linked together with the end of intaking of suction pump, the play water end of suction pump is linked together through the left surface of raceway with the water planting case, the right flank of raceway passes through the lower fixed surface of dead lever with the water planting case and is connected, the lower surface of water planting case is linked together through the upper surface of back flow with the storage water tank. This planting device for soilless culture vegetables through the combined action of handle, second pivot, second bearing, screw thread post, screw cap, connecting rod, mounting panel, telescopic link and LED banks to realized illumination intensity's regulation, can effectively adjust according to external environment, thereby be favorable to the photosynthesis of green algae biology in the hydroponic liquid, thereby be favorable to vegetable seedling's growth.

Description

Planting device for soilless culture vegetables

Technical Field

The utility model relates to an agricultural planting technical field specifically is a soilless culture is planting device for vegetables.

Background

With the increasing development of social science, the living standard of people is greatly improved. The traditional agriculture has low yield due to a plurality of factors such as illumination, soil and water quality, along with the beginning of industrial revolution, less green cultivated land and more serious soil pollution are generated, the quality of vegetables cannot meet the requirements of modern people, the soilless culture is the trend of the modern agriculture, the soilless culture refers to a culture method of irrigating by using a substrate instead of natural soil or only using the substrate during seedling culture and using a nutrient solution after field planting, because the soilless culture can artificially create a good rhizosphere environment to replace the soil environment, soil diseases are effectively prevented, the requirements of crops on environmental conditions such as mineral nutrition, moisture, gas and the like are fully met, and basic materials for culture can be recycled, so the method has the characteristics of water saving, fertilizer saving, labor saving, high yield, high quality and the like.

Hydroponics is the cultivation of plants without the need for soil, where the growth of the plants takes up not the soil but the minerals contained in the hydroponics, i.e. the cultivation of plants by water provides the plants directly with the minerals needed for their growth.

When using the water planting method to plant, the volume of wayward hydroponic liquid, lead to the volume of hydroponic liquid too big in the hydroponic case, thereby be unfavorable for vegetable seedling's growth and development, and cause the waste of hydroponic liquid, and need carry out the light filling to the hydroponic case when external illumination is not enough, promote the growth and the reproduction of green algae biology in the hydroponic liquid, be convenient for carry out photosynthesis, the oxygen content in the hydroponic liquid has been increased, be favorable to the vegetable root to carry out the oxygen absorption, but traditional light source luminance is fixed luminance usually, can't adjust illumination intensity, thereby can't be effectual as required regulation illumination intensity, be unfavorable for the photosynthesis of green algae biology in the hydroponic liquid, thereby be unfavorable for vegetable seedling's growth.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model is not enough to prior art, the utility model provides a soilless culture is planting device for vegetables, solved when using the hydroponics method to plant, the volume of wayward hydroponics liquid, the volume that leads to hydroponics liquid in the hydroponics case is too big, thereby be unfavorable for vegetable seedling's growth and development, and cause the waste of hydroponics liquid, and need carry out the light filling to the hydroponics case when external illumination is not enough, but traditional light source luminance is fixed luminance usually, can't adjust illumination intensity, thereby can't be as required effectual regulation illumination intensity, be unfavorable for the photosynthesis of green algae organism in the hydroponics liquid, thereby be unfavorable for vegetable seedling's growth's problem.

(II) technical scheme

In order to achieve the above purpose, the utility model adopts the technical proposal that: a planting device for soilless culture vegetables comprises a base, wherein a water storage tank is fixedly connected to the upper surface of the base, a water pumping pipe is arranged inside the water storage tank, the top end of the water pumping pipe is communicated with the water inlet end of a water pumping pump, the water outlet end of the water pumping pump is communicated with the left side surface of a water culture tank through a water pipe, the right side surface of the water pipe is fixedly connected with the lower surface of the water culture tank through a fixing rod, the lower surface of the water culture tank is communicated with the upper surface of the water storage tank through a return pipe, a return casing is arranged on the left side surface of the return pipe, a U-shaped plate is fixedly connected to the upper surface of the inner wall of the return casing, a first rotating device is fixedly connected to the inner wall of the U-shaped plate, a baffle is fixedly connected to the right side surface of the first rotating device, the upper surface of the baffle is in lap joint, and the outer wall of the baffle is lapped with the inner wall of the return pipe.

Two fixed plates of inner wall fixedly connected with of water planting case, and the upper surface of two fixed plates all with the lower surface overlap joint of cystosepiment, a plurality of water planting hole has been seted up to the upper surface of cystosepiment, the inner wall in water planting hole is provided with biochemical sponge, plant hole has been seted up to the upper surface of biochemical sponge, the left and right sides face of water planting case all through the connecting plate respectively with the opposite face fixed connection of two backup pads, and the lower surface of two backup pads all with the last fixed surface of base be connected, and the same illumination casing of last fixed surface fixedly connected with of two backup pads.

The inner wall of illumination casing is provided with the light-passing board, and the upper surface joint of the inner wall of illumination casing has the second rotating device, the both ends of second rotating device respectively with the bottom of handle and the top fixed connection of screw thread device, the equal fixedly connected with connecting rod of the left and right sides face of screw thread device, and the bottom of two connecting rods all is connected with the last fixed surface of mounting panel, the upper surface of mounting panel passes through the last fixed surface of two telescopic links and illumination casing inner wall to be connected, the lower surface of mounting panel is provided with the LED banks, the left surface of storage water tank is provided with power, first switch and second switch.

Preferably, the upper surface of storage water tank is provided with the inlet pipe, the front of inlet pipe is provided with the valve.

Preferably, the output end of the power supply is electrically connected with the input ends of the first switch and the second switch respectively through a lead, the output end of the first switch is electrically connected with the input end of the water suction pump through a lead, and the output end of the second switch is electrically connected with the input end of the LED lamp bank through a lead.

Preferably, the first rotating device comprises a first rotating shaft, two ends of the first rotating shaft are respectively fixedly connected with the front side and the back side of the inner wall of the U-shaped plate, the outer wall of the first rotating shaft is sleeved with a first bearing, and the right side face of the first bearing is fixedly connected with the left side face of the baffle.

Preferably, the second rotating device comprises a second bearing, the second bearing is clamped on the upper surface of the inner wall of the lighting shell, a second rotating shaft is sleeved on the inner wall of the second bearing, and two ends of the second rotating shaft are respectively fixedly connected with the lower surface of the handle and the top end of the threaded device.

Preferably, the threaded device comprises a threaded column, the top end of the threaded column is fixedly connected with the bottom end of the second rotating shaft, a threaded cap is connected to the outer wall of the threaded column in a threaded mode, and the left side face and the right side face of the threaded cap are fixedly connected with the opposite faces of the two connecting rods respectively.

(III) advantageous effects

The beneficial effects of the utility model reside in that:

1. the planting device for soilless culture vegetables comprises a handle, a second rotating shaft, a second bearing, a threaded column, a threaded cap, connecting rods, a mounting plate, a telescopic rod and an LED lamp group, wherein the LED lamp group works by operating a second switch by a worker, the worker rotates the handle in a forward direction, so that the threaded column is driven to rotate by the second rotating shaft, the threaded cap drives the two connecting rods to move downwards, the mounting plate drives the LED lamp group to move downwards, the two telescopic rods extend, the illumination intensity is increased, the worker rotates the handle in a reverse direction, the threaded column is driven to rotate by the second rotating shaft, the threaded cap drives the two connecting rods to move upwards, the mounting plate drives the LED lamp group to move upwards, the two telescopic rods are shortened, the illumination intensity is reduced, and the illumination intensity is adjusted, can be effectively adjusted according to the external environment, thereby being beneficial to the photosynthesis of green algae organisms in the water culture solution and being beneficial to the growth of vegetable seedlings.

2. This soilless culture is planting device for vegetables, through first pivot, first bearing, the baffle, the combined action of spring and back flow, when hydroponic liquid is too much in the hydroponic case, the baffle rotates downwards under the effect of hydroponic liquid gravity, the spring shortens, thereby make the hydroponic liquid in the hydroponic case pass through in the back flow inflow water storage tank, when hydroponic liquid is to suitable volume in the hydroponic case, the baffle upwards rotates under the effect of spring force and with the inner wall overlap joint of back flow, make the upper surface of baffle and the lower surface overlap joint of backward flow shells inner wall, thereby the automatically regulated of hydroponic liquid volume in the hydroponic case has been realized, and the recovery of hydroponic liquid has been realized, the waste of hydroponic liquid has been avoided, and be favorable to vegetable seedling's growth.

3. This planting device for soilless culture vegetables through setting up biochemical sponge, adopts the biochemical sponge that the water retention performance is good, is favorable to the vegetable seedling root to absorb and sprout, has improved vegetable seedling's growth efficiency, through setting up the plant hole to be favorable to vegetable seedling's fixed.

Drawings

Fig. 1 is a schematic front view of a cross-sectional structure of the present invention;

FIG. 2 is a schematic view of the front cross-sectional structure of the return pipe of the present invention;

fig. 3 is an enlarged schematic structural view of part a of the present invention.

In the figure: 1 base, 2 water storage tanks, 3 water suction pipes, 4 water suction pumps, 5 water delivery pipes, 6 water culture tanks, 7 return pipes, 8 return shells, 9U-shaped plates, 10 first rotating devices, 101 first rotating shafts, 102 first bearings, 11 baffles, 12 springs, 13 fixing plates, 14 foam plates, 15 water culture holes, 16 biochemical sponges, 17 plant holes, 18 connecting plates, 19 supporting plates, 20 lighting shells, 21 light-passing plates, 22 second rotating devices, 221 second bearings, 222 second rotating shafts, 23 handles, 24 thread devices, 241 thread columns, 242 thread caps, 25 mounting plates, 26 LED lamp sets, 27 telescopic rods, 28 feeding pipes, 29 valves, 30 power supplies, 31 first switches, 32 second switches, 33 fixing rods and 34 connecting rods.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-3, the utility model provides a technical solution: a planting device for soilless culture vegetables comprises a base 1, the upper surface of the base 1 is fixedly connected with a water storage tank 2, through the arrangement of the water storage tank 2, the water storage tank 2 is made of transparent materials, growth and reproduction of green algae organisms in water culture liquid are facilitated, photosynthesis is facilitated, oxygen content in the water culture liquid is increased, oxygen absorption of vegetable seedling roots is facilitated, an inlet pipe 28 is arranged on the upper surface of the water storage tank 2, a valve 29 is arranged on the front side of the inlet pipe 28, through the arrangement of the inlet pipe 28 and the valve 29, the inlet pipe 28 is opened through the valve 29, the water culture liquid is conveniently added into the water storage tank 2 through the inlet pipe 28, a water suction pipe 3 is arranged inside the water storage tank 2, the top end of the water suction pipe 3 is communicated with a water inlet end of a water suction pump 4, a water outlet end of the water suction pump 4 is communicated with the left side, the staff makes suction pump 4 work through operation first switch 31, thereby make the water planting liquid in the storage water tank 2 flow into suction pump 4 from drinking-water pipe 3, the water planting liquid flows out from the outlet end of suction pump 4 and flows into water planting case 6 through raceway 5, thereby provide power for the transport of water planting liquid, the right side of raceway 5 is connected with the lower fixed surface of water planting case 6 through dead lever 33, through setting up dead lever 33, thereby the fixing and the support of raceway 5 have been realized, the lower surface of water planting case 6 is linked together with the upper surface of storage water tank 2 through back flow pipe 7, through setting up water planting case 6, and water planting case 6 is transparent material, thereby be favorable to the growth and the reproduction of green algae organism in the water planting liquid, be convenient for carry out photosynthesis, the oxygen content in the water planting liquid has been increased, be favorable to the root of vegetable seedling to carry out oxygen absorption, the left surface of back flow pipe, the upper surface of the inner wall of the backflow shell 8 is fixedly connected with a U-shaped plate 9, the inner wall of the U-shaped plate 9 is fixedly connected with a first rotating device 10, the right side surface of the first rotating device 10 is fixedly connected with a baffle plate 11, the first rotating device 10 comprises a first rotating shaft 101, two ends of the first rotating shaft 101 are respectively fixedly connected with the front surface and the back surface of the inner wall of the U-shaped plate 9, a first bearing 102 is sleeved on the outer wall of the first rotating shaft 101, the rotation of the baffle plate 11 is realized by arranging the first rotating shaft 101 and the first bearing 102, the right side surface of the first bearing 102 is fixedly connected with the left side surface of the baffle plate 11, the upper surface of the baffle plate 11 is lapped with the upper surface of the inner wall of the backflow shell 8, the lower surface of the baffle plate 11 is fixedly connected with the left side surface of the inner wall of the backflow shell 8 through a spring 12, and under the combined action of the first rotating shaft 101, the first bearing 102, baffle 11 rotates downwards under the effect of water planting liquid gravity, spring 12 shortens, thereby make the water planting liquid in water planting case 6 flow in storage water tank 2 through back flow pipe 7, when water planting liquid to suitable volume in water planting case 6, baffle 11 upwards rotates under the effect of spring 12 elasticity and with the inner wall overlap joint of back flow pipe 7, make the upper surface of baffle 11 and the lower surface overlap joint of 8 inner walls of backward flow casing, thereby realized the automatically regulated of water planting liquid volume in water planting case 6, and realized the recovery of water planting liquid, the waste of water planting liquid has been avoided, and be favorable to vegetable seedling's growth, and the outer wall of baffle 11 and the inner wall overlap joint of back flow pipe 7, through setting up baffle 11, and the outer wall of baffle 11 is provided with sealed the pad, thereby make baffle 11 better to the effect of sheltering from of back flow pipe 7.

The inner wall of the water culture box 6 is fixedly connected with two fixing plates 13, the upper surfaces of the two fixing plates 13 are respectively lapped with the lower surface of the foam plate 14, the foam board 14 is supported by the fixing board 13, a plurality of water culture holes 15 are arranged on the upper surface of the foam board 14, biochemical sponge 16 is arranged on the inner wall of each water culture hole 15, by arranging the biochemical sponge 16 and adopting the biochemical sponge 16 with good water retention property, the absorption and the germination of the roots of the vegetable seedlings are facilitated, the growth efficiency of the vegetable seedlings is improved, the upper surface of the biochemical sponge 16 is provided with the plant holes 17, by arranging the plant holes 17, thereby being beneficial to fixing the vegetable seedlings, the left and right side surfaces of the water culture box 6 are respectively and fixedly connected with the opposite surfaces of the two supporting plates 19 through the connecting plates 18, and the lower surfaces of the two supporting plates 19 are fixedly connected with the upper surface of the base 1, and the upper surfaces of the two supporting plates 19 are fixedly connected with the same lighting housing 20.

The inner wall of the lighting shell 20 is provided with a light-transmitting plate 21, the upper surface of the inner wall of the lighting shell 20 is connected with a second rotating device 22 in a clamping manner, two ends of the second rotating device 22 are respectively fixedly connected with the bottom end of the handle 23 and the top end of the threaded device 24, the second rotating device 22 comprises a second bearing 221, the second bearing 221 is connected with the upper surface of the inner wall of the lighting shell 20 in a clamping manner, the inner wall of the second bearing 221 is sleeved with a second rotating shaft 222, the rotation of the threaded column 241 is more stable by arranging the second rotating shaft 222 and the second bearing 221, two ends of the second rotating shaft 222 are respectively fixedly connected with the lower surface of the handle 23 and the top end of the threaded device 24, the left side surface and the right side surface of the threaded device 24 are both fixedly connected with connecting rods 34, the threaded device 24 comprises a threaded column 241, the top end of the threaded column 241 is fixedly connected with, through setting up screw post 241 and screw cap 242, the staff rotates handle 23 through the forward, thereby make second pivot 222 take screw post 241 to rotate, thereby make screw cap 242 take two connecting rods 34 downstream, thereby make mounting panel 25 take LED banks 26 downstream, two telescopic link 27 extensions, thereby make illumination intensity grow, the staff is through reverse rotation handle 23, thereby make second pivot 222 take screw post 241 to rotate, thereby make screw cap 242 take two connecting rods 34 upward movement, thereby make mounting panel 25 take LED banks 26 upward movement, two telescopic link 27 shorten, thereby make illumination intensity diminish, thereby realized illumination intensity's regulation, can effectively adjust according to external environment, thereby be favorable to the photosynthesis of green algae organism in the hydroponic liquid, thereby be favorable to vegetable seedling's growth, the left side surface and the right side surface of the screw cap 242 are respectively fixedly connected with the opposite surfaces of the two connecting rods 34, the bottom ends of the two connecting rods 34 are respectively fixedly connected with the upper surface of the mounting plate 25, the upper surface of the mounting plate 25 is fixedly connected with the upper surface of the inner wall of the illumination shell 20 through the two telescopic rods 27, the mounting plate 25 is enabled to drive the LED lamp set 26 to ascend and descend more stably by arranging the telescopic rods 27, the rotation of the mounting plate 25 is prevented, the screw cap 242 is prevented from rotating along with the rotation of the screw post 241, the ascending and descending of the screw cap 242 are realized, the LED lamp set 26 is arranged on the lower surface of the mounting plate 25, the left side surface of the water storage tank 2 is provided with a power supply 30, a first switch 31 and a second switch 32, the output end of the power supply 30 is respectively electrically connected with the input ends of the first switch 31 and the second switch 32 through wires, through setting up first switch 31 for the staff is more convenient to the control of suction pump 4 operating condition, and the output of second switch 32 passes through the wire and is connected with the input electricity of LED banks 26, through setting up second switch 32, makes the staff more convenient to the control of LED banks 26 operating condition.

The utility model discloses an operating procedure does:

s1, placing the vegetable seedlings in the plant holes 17 of the biochemical sponge 16, enabling the water suction pump 4 to work by operating the first switch 31 by a worker, enabling the water culture solution in the water storage tank 2 to flow into the water suction pump 4 from the water suction pipe 3, enabling the water culture solution to flow out from the water outlet end of the water suction pump 4 and flow into the water culture tank 6 through the water conveying pipe 5, and enabling the water suction pump 4 to stop working by operating the first switch 31 by the worker when the water culture solution in the water culture tank 6 reaches a proper amount;

s2, when the hydroponic liquid in the hydroponic tank 6 is too much, the baffle plate 11 rotates downwards under the action of the gravity of the hydroponic liquid, the spring 12 is shortened, so that the hydroponic liquid in the hydroponic tank 6 flows into the water storage tank 2 through the return pipe 7, when the hydroponic liquid in the hydroponic tank 6 reaches a proper amount, the baffle plate 11 rotates upwards under the action of the elastic force of the spring 12 and is lapped with the inner wall of the return pipe 7, the upper surface of the baffle plate 11 is lapped with the lower surface of the inner wall of the return casing 8, and the recovery of the hydroponic liquid is achieved;

s3, when illumination is needed, a worker enables the LED lamp group 26 to work by operating the second switch 32, the worker rotates the handle 23 in the forward direction, the second rotating shaft 222 rotates with the threaded column 241, the threaded cap 242 moves downwards with the two connecting rods 34, the mounting plate 25 moves downwards with the LED lamp group 26, the two telescopic rods 27 extend, the illumination intensity is increased, the worker rotates the handle 23 in the reverse direction, the second rotating shaft 222 rotates with the threaded column 241, the threaded cap 242 moves upwards with the two connecting rods 34, the mounting plate 25 moves upwards with the LED lamp group 26, the two telescopic rods 27 shorten, the illumination intensity is reduced, and the illumination intensity is adjusted.

The above-mentioned embodiments further describe the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a soilless culture is planting device for vegetables, includes base (1), its characterized in that: the upper surface of base (1) is fixedly connected with storage water tank (2), the inside of storage water tank (2) is provided with drinking-water pipe (3), the top of drinking-water pipe (3) is linked together with the end of intaking of suction pump (4), the play water end of suction pump (4) is linked together through raceway (5) and the left surface of water planting case (6), the right side of raceway (5) is connected with the lower fixed surface of water planting case (6) through dead lever (33), the lower surface of water planting case (6) is linked together with the upper surface of storage water tank (2) through back flow (7), the left surface of back flow (7) is provided with backward flow casing (8), the upper surface fixed connection of backward flow casing (8) inner wall has U-shaped plate (9), the inner wall fixed connection of U-shaped plate (9) has first rotating device (10), the right side fixed connection of first rotating device (10) has baffle (11), the upper surface of the baffle (11) is lapped with the upper surface of the inner wall of the backflow shell (8), the lower surface of the baffle (11) is fixedly connected with the left side surface of the inner wall of the backflow shell (8) through a spring (12), and the outer wall of the baffle (11) is lapped with the inner wall of the backflow pipe (7);

the inner wall of the water culture box (6) is fixedly connected with two fixing plates (13), the upper surfaces of the two fixing plates (13) are in lap joint with the lower surface of a foam plate (14), the upper surface of the foam plate (14) is provided with a plurality of water culture holes (15), biochemical sponge (16) is arranged on the inner wall of each water culture hole (15), plant holes (17) are formed in the upper surface of each biochemical sponge (16), the left side surface and the right side surface of the water culture box (6) are respectively and fixedly connected with the opposite surfaces of two supporting plates (19) through connecting plates (18), the lower surfaces of the two supporting plates (19) are fixedly connected with the upper surface of the base (1), and the upper surfaces of the two supporting plates (19) are fixedly connected with the same illumination shell (20);

the inner wall of illumination casing (20) is provided with light-passing board (21), and the upper surface joint of the inner wall of illumination casing (20) has second rotating device (22), the both ends of second rotating device (22) respectively with the bottom of handle (23) and the top fixed connection of screw thread device (24), the equal fixedly connected with connecting rod (34) of the left and right sides face of screw thread device (24), and the bottom of two connecting rods (34) all with the upper surface fixed connection of mounting panel (25), the upper surface of mounting panel (25) is through the upper surface fixed connection of two telescopic links (27) and illumination casing (20) inner wall, the lower surface of mounting panel (25) is provided with LED banks (26), the left surface of storage water tank (2) is provided with power (30), first switch (31) and second switch (32).

2. A planting device for soilless culture vegetables according to claim 1, wherein: the upper surface of storage water tank (2) is provided with inlet pipe (28), the front of inlet pipe (28) is provided with valve (29).

3. A planting device for soilless culture vegetables according to claim 1, wherein: the output end of the power supply (30) is electrically connected with the input ends of the first switch (31) and the second switch (32) through wires respectively, the output end of the first switch (31) is electrically connected with the input end of the water suction pump (4) through wires, and the output end of the second switch (32) is electrically connected with the input end of the LED lamp bank (26) through wires.

4. A planting device for soilless culture vegetables according to claim 1, wherein: first rotary device (10) include first pivot (101), the both ends of first pivot (101) respectively with the front and the back fixed connection of U-shaped plate (9) inner wall, and the outer wall of first pivot (101) has cup jointed first bearing (102), the right flank of first bearing (102) and the left surface fixed connection of baffle (11).

5. A planting device for soilless culture vegetables according to claim 1, wherein: the second rotating device (22) comprises a second bearing (221), the second bearing (221) is connected to the upper surface of the inner wall of the illumination shell (20) in a clamped mode, a second rotating shaft (222) is sleeved on the inner wall of the second bearing (221), and two ends of the second rotating shaft (222) are fixedly connected with the lower surface of the handle (23) and the top end of the threaded device (24) respectively.

6. A planting device for soilless culture vegetables according to claim 5, wherein: the threaded device (24) comprises a threaded column (241), the top end of the threaded column (241) is fixedly connected with the bottom end of the second rotating shaft (222), a threaded cap (242) is connected to the outer wall of the threaded column (241) in a threaded mode, and the left side face and the right side face of the threaded cap (242) are fixedly connected with the opposite faces of the two connecting rods (34) respectively.