CN109986979B

CN109986979B - Agricultural seeding equipment charger

Info

Publication number: CN109986979B
Application number: CN201910315493.0A
Authority: CN
Inventors: 潘松; 廖禺; 吴罗发; 陈立才; 舒时富; 王康军; 黄俊宝; 刘洋
Original assignee: Agricultural Engineering Research Institute Jiangxi Academy Of Agricultural Sciences
Current assignee: Agricultural Engineering Research Institute Jiangxi Academy Of Agricultural Sciences
Priority date: 2019-04-17
Filing date: 2019-04-17
Publication date: 2021-05-07
Anticipated expiration: 2039-04-17
Also published as: CN109986979A

Abstract

The invention discloses an agricultural seeding equipment charger, which relates to the technical field of agricultural machinery charging equipment and aims to solve the problem of poor safety of the conventional agricultural charger.

Description

Agricultural seeding equipment charger

Technical Field

The invention relates to the technical field of agricultural machinery charging equipment, in particular to a charger for agricultural sowing equipment.

Background

The sowing equipment is a planting machine taking crop seeds as sowing objects, is used for a sowing machine of certain types or certain types of crop seeds, and is usually named as crop types, such as grain drilling equipment, corn hole sowing equipment, cotton sowing equipment, pasture grass sowing equipment and the like. At present, electric seeding equipment on the market uses a storage battery as an energy source, and has the defects of insufficient electric power, weak cruising ability and inapplicability to field operation.

Meanwhile, the charger is a power conversion device, is a power conversion device with specific functions used for charging batteries, and has the advantages of small size, high power and the like. The power module is shaped like a brick, so the power module is called a brick power supply. At present, the brick power supply can be divided into a full brick power supply module, a half brick power supply module, a quarter power supply module, an eighth power supply module and the like according to the size of the brick power supply. The full-brick power supply is a standard module power supply with the size of a full brick, can effectively utilize space, and is often used as a power supply module of a charger of an agricultural transportation machine.

In the prior art, when the all-brick power module is assembled, the upper cover and the lower cover are closed to form a cavity, the PCBA is installed in the cavity, the pouring sealant is introduced into the cavity from the through hole of the upper cover, and the pouring sealant flows in the cavity to cover the PCBA, so that the effects of water resistance, vibration resistance and suitability for use in severe environments are achieved.

Also disclosed in chinese patent application No. 201420439488 is an AC-DC full-brick power module, which includes an aluminum substrate and a small capacitor plate, where the aluminum substrate has a rectifier bridge D6, D7, an inductor L2, a sampling resistor R7, a MOS transistor Q8, a rectifier transistor D9, a thyristor SCR1, an LLC resonant inductor L1, an LLC half-bridge MOS transistor Q1, a transistor Q2, an isolation transformer T1, a secondary side synchronous rectification MOS transistor, an output sampling resistor R23, and an output filter capacitor; LLC resonance capacitors are distributed on the small capacitor plates; the distribution layout of the main components is that rectifier bridges D6 and D7 are located at the upper left corner of the aluminum substrate, an inductor L2 is located at the lower left corner of the aluminum substrate, LLC half-bridge MOS tubes Q1 and Q2 are located at the middle lower part of the aluminum substrate, and output filter capacitors are vertically arranged at the edge of the right side of the aluminum substrate, so that the power which can be output by a power supply, the overall efficiency and the reliability are optimal.

The above prior art solutions have the following drawbacks: because the volume of the full-brick power module is limited, an EMI filter circuit and a protection circuit cannot be designed perfectly in the module, and when a charger adopting the full-brick power module is used in a harsher environment (such as under the conditions of high temperature, thunderstorm weather and the like), faults are easy to occur, and even safety accidents such as explosion occur.

Disclosure of Invention

The invention aims to provide a charger for agricultural sowing equipment, which has the effects of small size, high power and good safety.

The above object of the present invention is achieved by the following technical solutions:

an embedded CPU used for accurately controlling the charging process of the charger is arranged inside the AC-DC full-brick power module, the input end of the AC-DC full-brick power module is connected with a front-end protection module, the output end of the AC-DC full-brick power module is connected with a rear-end output module used for filtering direct-current voltage output by the AC-DC full-brick power module into stable direct-current voltage, and the front-end protection module and the rear-end output module are jointly connected with a control module capable of cutting off input and output of the charger.

By adopting the technical scheme, the power module of the agricultural charger adopts the AC-DC full-brick power module, so that the charger has the advantages of small volume and high power. The input and output stability of the charger is also ensured through the front-end protection module and the rear-end output module, so that the performance and the safety of the charger are effectively improved. When the charger is used in a harsh environment (for example, under the conditions of high temperature, thunderstorm weather and the like), if an emergency situation occurs suddenly, the input and the output of the charger can be cut off in time through the control module, so that the safety accident is effectively avoided, the charger has the advantages of small size and high power, and the charger also has the advantage of high safety.

The invention is further configured to: the front-end protection module comprises a fuse, a common-mode inductor, a first capacitor, a second capacitor and a third capacitor, wherein the first capacitor, the second capacitor and the third capacitor are nonpolar capacitors, and the common-mode inductor comprises a first inductance coil and a second inductance coil; one end of the fuse is connected with a live wire, and the other end of the fuse is connected with one pole of the first capacitor and one end of the first inductance coil of the common-mode inductor; the other pole of the first capacitor is connected with a zero line and one end of a second inductance coil of the common-mode inductor; the other end of the first inductance coil of the common-mode inductor is connected with one pole of a second capacitor and the live wire end of the AC-DC full-brick power module, and the other end of the second inductance coil of the common-mode inductor is connected with one pole of a third capacitor and the live wire end of the AC-DC full-brick power module; and the other pole of the second capacitor and the other pole of the third capacitor are both connected with the ground wire and the ground wire end of the AC-DC full-brick power module.

By adopting the technical scheme, the fuse is of a slow fusing type, and because the working current of the charger is pulse current and the charger has larger surge current in the starting process, the fuse of the slow fusing type can play a better protection role on the charger. The common-mode inductor can effectively improve the EMI performance of the power supply, so that the charger works more stably and has higher safety.

The invention is further configured to: the front-end protection module also comprises a thermistor and a piezoresistor; the thermistor is arranged on a circuit connected with the fuse and the first capacitor, and the first capacitor is connected with the thermistor in parallel; one end of the piezoresistor is connected with one pole of the first capacitor, and the other end of the piezoresistor is connected with the other pole of the first capacitor.

By adopting the technical scheme, the thermistor is used for inhibiting the surge impact current of the power input end, and the piezoresistor is used for inhibiting the surge impact voltage of the power input end, so that the stability of power input is ensured, and the charger can stably work in a high-power state.

The invention is further configured to: the rear-end output module comprises a fourth capacitor, a fifth capacitor and a transient suppressor, wherein the fourth capacitor is a polar capacitor, and the fifth capacitor is a non-polar capacitor; the anode of the fourth capacitor, one pole of the fifth capacitor and one end of the transient suppressor are connected with the output anode of the AC-DC full-brick power module, and the end of the transient suppressor connected with the output anode of the AC-DC full-brick power module is the anode output end of the charger; the cathode of the fourth capacitor, the other pole of the fifth capacitor and the other end of the transient suppressor are all connected with the output cathode of the AC-DC full-brick power module, and the end, connected with the output cathode of the AC-DC full-brick power module, of the transient suppressor is the cathode output end of the charger.

By adopting the technical scheme, the fourth capacitor and the fifth capacitor can play a role in filtering, the response speed of the transient suppressor is high, and the load end can be effectively protected.

The invention is further configured to: the control module comprises an AC-DC switching power supply, a button switch, a first intermediate relay and a second intermediate relay, the AC-DC switching power supply comprises an alternating current input end and a direct current output end, the first intermediate relay comprises a first normally closed contact and a second normally closed contact, and the second intermediate relay comprises a third normally closed contact and a fourth normally closed contact;

the positive electrode of the alternating current input end of the AC-DC switching power supply is connected to a live wire, and the negative electrode of the alternating current input end of the AC-DC switching power supply is connected to a zero wire; the positive electrode of the direct current output end of the AC-DC switching power supply is connected to one end of a button switch, and the other end of the button switch is connected to one end of a coil of a first intermediate relay and one end of a coil of a second intermediate relay; the other end of the coil of the first intermediate relay and the other end of the coil of the second intermediate relay are both connected to the negative electrode of the direct current output end of the AC-DC switching power supply;

the first normally closed contact of the first intermediate relay is arranged on a circuit for connecting the fuse with a live wire, one end of the first normally closed contact of the first intermediate relay is connected to the live wire, and the other end of the first normally closed contact of the first intermediate relay is connected to the fuse; the second normally closed contact of the first intermediate relay is arranged on a circuit where the first capacitor is connected with the zero line, one end of the second normally closed contact of the first intermediate relay is connected to the zero line, and the other end of the second normally closed contact of the first intermediate relay is connected to the first capacitor;

one end of a third normally closed contact of the second intermediate relay is connected to one end of the transient suppressor, and the other end of the third normally closed contact of the second intermediate relay is an anode output end of the charger; one end of a fourth normally closed contact of the second intermediate relay is connected to the other end of the transient suppressor, and the other end of the fourth normally closed contact of the second intermediate relay is a negative electrode output end of the charger.

By adopting the technical scheme, the alternating current forms safe direct current after passing through the AC-DC switching power supply, when emergency occurs, the first normally closed contact, the second normally closed contact, the third normally closed contact and the fourth normally closed contact can be changed from normally closed to normally open by pressing the button switch, so that the input and the output of the charger are cut off, the safety accident under the emergency is effectively avoided, and the safety is further improved on the basis of the advantages of small size and high power.

The invention is further configured to: the control module still includes pilot lamp and protective resistance, the one end of pilot lamp and protective resistance's one end all are connected to the one end of first intermediate relay's coil, the other end of pilot lamp and protective resistance's the other end all is connected to the other end of first intermediate relay's coil.

By adopting the technical scheme, the indicating lamp has an indicating function and is used for indicating whether the button switch is pressed down or not. The protective resistor has a protective effect, can effectively prevent the indicator lamp from being burnt out, and prolongs the service life of the indicator lamp.

The invention is further configured to: the shell comprises a shell with openings at two ends, a plurality of radiating fins are arranged on the outer side wall of the shell, end covers for sealing the openings at the end parts of the shell are arranged at two ends of the shell, and the end covers are connected with the shell through screws; the side wall of the end cover close to the shell is provided with a clamping block, and two ends of the shell are provided with clamping grooves; the clamping block on each end cover is arranged, and the clamping groove is arranged along the circumferential direction of the shell and extends to the inner side wall of the shell; the clamping blocks extend into the corresponding clamping grooves and block the corresponding clamping grooves, and the clamping grooves are positioned between the corresponding screws and the corresponding openings at the end parts of the shells; and a sealing gasket which is abutted against the bottom wall of the clamping groove is arranged at the edge of one end, extending into the clamping groove, of the clamping block along the circumferential direction of the clamping groove.

Through adopting above-mentioned technical scheme, the fixture block cooperates with the draw-in groove inlay card, has the effect of location, inserts the fixture block back in the draw-in groove, thereby can conveniently screw in the screw and fix the end cover, and then seals the opening at shell both ends. Due to the arrangement of the sealing washer, the sealing effect of the end cover on the opening of the end part of the shell is further improved, the dustproof and waterproof effect of the charger is greatly enhanced, and the safety of the charger is effectively improved.

The invention is further configured to: the clamping block is in a quadrangular frustum pyramid shape, and an annular glue filling cavity is formed between the clamping block and the side wall and the bottom wall of the corresponding clamping groove; the end cover is provided with the encapsulating hole that communicates with the annular encapsulating chamber that corresponds on keeping away from the lateral wall of shell, the encapsulating hole is located the top that the lateral wall of shell was kept away from to the corresponding end cover and is used for adding sealing glue to annular encapsulating intracavity.

By adopting the technical scheme, the annular glue filling cavity is filled with the sealing glue through the glue filling hole, and after the sealing glue is cured, the gap between the end cover and the shell can be completely blocked, so that the waterproof performance of the charger is effectively enhanced, the service life is longer, and the safety is better. When glue is injected into the annular glue injection cavity, the glue cannot overflow into the shell due to the arrangement of the sealing washer.

The invention is further configured to: the annular glue filling cavity comprises a top cavity close to the top end of the charger, a bottom cavity close to the bottom end of the charger and two side cavities which enable the top cavity and the bottom cavity to be communicated and enable the annular glue filling cavity to be annular; the side wall of the fixture block is provided with two stopper blocks which are arranged in the top cavity, and the two glue pouring holes are communicated with the top cavity and are respectively arranged on two sides of the stopper blocks.

Through adopting above-mentioned technical scheme, when being glued by one of them encapsulating hole to annular encapsulating intracavity encapsulating, another encapsulating hole is used for the air of the annular encapsulating intracavity of discharging, through the setting of dog, can prevent effectively that glue from flowing from another encapsulating hole for the encapsulating operation is simpler, more efficient.

The invention is further configured to: the top cavity comprises a first glue injection cavity and a second glue injection cavity which are respectively positioned on two sides of the stop block, and the first glue injection cavity and the second glue injection cavity are inclined towards the corresponding side cavity direction and are obtuse angles with the included angle between the corresponding side cavities.

By adopting the technical scheme, when glue is filled into the annular glue filling cavity from one of the glue filling holes, the glue can flow to the side cavity and the bottom cavity along the corresponding glue filling cavity, so that the drainage effect is achieved, the annular glue filling cavity can be effectively filled with the glue, and the safety of the charger is effectively guaranteed.

In conclusion, the beneficial technical effects of the invention are as follows:

1. through the arrangement of the front-end protection module, the rear-end output module and the control module, the charger has the advantage of good safety on the basis of small size and high power;

2. the end cover is easier to mount and the sealing effect of the end cover on the shell is also improved by arranging the clamping block, the clamping groove and the sealing washer;

3. through the setting of annular encapsulating chamber and encapsulating hole, the security that has further increased the machine that charges.

Drawings

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

FIG. 1 is a schematic overall structure diagram of a first embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a housing according to a first embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a housing according to a second embodiment of the present invention;

FIG. 4 is a schematic structural diagram of an end cap according to a second embodiment of the present invention;

FIG. 5 is an enlarged view of portion A of FIG. 4;

FIG. 6 is a cross-sectional view of the housing in a second embodiment of the invention;

fig. 7 is an enlarged view of portion B of fig. 6;

FIG. 8 is a cross-sectional view of an end cap according to a second embodiment of the present invention;

fig. 9 is an enlarged view of a portion C in fig. 8.

Description of reference numerals: 10. a housing; 11. a housing; 12. a heat sink; 13. a card slot; 14. a base plate; 20. an AC-DC full-brick power module; 30. a front end protection module; 40. a back end output module; 50. a control module; 51. an AC-DC switching power supply; 60. an end cap; 61. a clamping block; 62. a sealing gasket; 63. filling glue holes; 64. a stopper; 70. an annular glue filling cavity; 71. a top chamber; 72. a bottom cavity; 73. a lateral cavity; 74. a first glue injection cavity; 75. and a second glue injection cavity.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example one

Referring to fig. 1 and 2, the agricultural seeding equipment charger disclosed by the invention comprises a housing 10 and an AC-DC full-brick power module 20 fixedly arranged in the housing 10. The embedded CPU is disposed inside the AC-DC full-brick power module 20, and is used for accurately controlling a charging process when the charger charges the electric vehicle. Specifically, the input voltage of the charger is 85 VAC-265 VAC, and the output power of the charger is 450W.

Referring to fig. 1, the input terminal of the AC-DC full-brick power module 20 is connected to a front-end protection module 30 for protecting the circuit and the AC-DC full-brick power module 20 and improving the safety of the charger. The output end of the AC-DC full-brick power supply module 20 is connected to a back-end output module 40 for filtering the DC voltage output by the AC-DC full-brick power supply module 20 into a stable DC voltage. The front-end protection module 30 and the rear-end output module 40 are also commonly connected with a control module 50, and the input and the output of the charger can be timely cut off under severe environment or emergency conditions through the control module 50.

Referring to fig. 1, the front-end protection module 30 includes a FUSE, a common-mode inductor T1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a thermistor NTC, and a voltage dependent resistor RV, the first capacitor C1, the second capacitor C2, and the third capacitor C3 are all nonpolar capacitors, the FUSE selects a slow-melting type ZY0JGB12D 25W module, and the common-mode inductor T1 includes a first inductor and a second inductor. One end of the FUSE is connected with the live wire L, and the other end of the FUSE is connected with one end of the thermistor NTC. The other end of the thermistor NTC is connected to one end of the piezoresistor RV, one pole of the first capacitor C1 and one end of the first inductor coil of the common-mode inductor T1, and the other end of the piezoresistor RV, the other pole of the first capacitor C1 and one end of the second inductor coil of the common-mode inductor T1 are all connected to the neutral line N. The other end of the first inductor of the common mode inductor T1 is connected to one pole of the second capacitor C2 and the live wire end of the AC-DC full-brick power module 20, and the other end of the second inductor of the common mode inductor T1 is connected to one pole of the third capacitor C3 and the neutral wire end of the AC-DC full-brick power module 20. The other pole of the second capacitor C2 and the other pole of the third capacitor C3 are both connected to the ground line FG and the ground terminal of the AC-DC full brick power module 20.

Referring to fig. 1, the back-end output module 40 includes a fourth capacitor C4, a fifth capacitor C5 and a transient suppressor TVS, wherein the fourth capacitor C4 is a polar capacitor, and the fifth capacitor C5 is a non-polar capacitor. The anode of the fourth capacitor C4, one pole of the fifth capacitor C5 and one end of the transient suppressor TVS are all connected to the positive output pole of the AC-DC all-brick power module 20, and the cathode of the fourth capacitor C4, the other pole of the fifth capacitor C5 and the other end of the transient suppressor TVS are all connected to the negative output pole of the AC-DC all-brick power module 20.

Referring to fig. 1, the control module 50 includes an AC-DC switching power supply 51, a push button switch SB, a first intermediate relay KA1, a second intermediate relay KA2, an indicator lamp HL, and a protection resistor R, the AC-DC switching power supply 51 includes an alternating current input terminal and a direct current output terminal, and an output voltage of the AC-DC switching power supply 51 is 24 VDC. The first intermediate relay KA1 includes a first normally closed contact KA 1-1 and a second normally closed contact KA 1-2, and the second intermediate relay KA2 includes a third normally closed contact KA 2-1 and a fourth normally closed contact KA 2-2.

Referring to fig. 1, the positive pole of the alternating current input terminal of the AC-DC switching power supply 51 is connected to the live line L, and the negative pole of the alternating current input terminal of the AC-DC switching power supply 51 is connected to the neutral line N. The positive electrode of the direct current output terminal of the AC-DC switching power supply 51 is connected to one end of a push-button switch SB, and the other end of the push-button switch SB is connected to one end of an indicator lamp HL, one end of a protection resistor R, one end of a coil of the first intermediate relay KA1, and one end of a coil of the second intermediate relay KA 2. The other end of the indicator lamp HL, the other end of the protective resistor R, the other end of the coil of the first intermediate relay KA1 and the other end of the coil of the second intermediate relay KA2 are all connected to the negative electrode of the direct current output end of the AC-DC switching power supply 51.

Referring to fig. 1, a first normally closed contact KA 1-1 of a first intermediate relay KA1 is provided on a line where a FUSE is connected to a live line L, one end of the first normally closed contact KA 1-1 of the first intermediate relay KA1 is connected to the live line L, and the other end of the first normally closed contact KA 1-1 of the first intermediate relay KA1 is connected to the FUSE. The second normally closed contact KA 1-2 of the first intermediate relay KA1 is arranged on a line where the first capacitor C1 is connected with a neutral line N, one end of the second normally closed contact KA 1-2 of the first intermediate relay KA1 is connected to the neutral line N, and the other end of the second normally closed contact KA 1-2 of the first intermediate relay KA1 is connected to the first capacitor C1.

Referring to fig. 1, one end of a third normally closed contact KA 2-1 of a second intermediate relay KA2 is connected to one end of a transient suppressor TVS, and the other end of the third normally closed contact KA 2-1 of the second intermediate relay KA2 is a positive output terminal + Vc of a charger. One end of a fourth normally closed contact KA 2-2 of the second intermediate relay KA2 is connected to the other end of the transient suppressor TVS, and the other end of the fourth normally closed contact KA 2-2 of the second intermediate relay KA2 is a negative output end + Vo of the charger.

The implementation principle of the above embodiment is as follows:

when the charger works, alternating current is input into the AC-DC full-brick power module 20 through the front-end protection circuit, and the AC-DC full-brick power module 20 outputs a specific direct current voltage (with a rated output voltage of 12VDC, 24VDC, 36VDC, 48VDC or 60VDC) through the rear-end output module 40.

When the front-end protection module 30 works, the FUSE can play a role in overload protection, so that the charging safety of the charger is effectively ensured. The front-end protection module 30 and the rear-end output module 40 both have a filtering function, so that the input voltage and the output voltage of the charger are more stable, and the charger has better performance and is safer.

When the charger is used in a harsh environment (for example, under the conditions of high temperature, thunderstorm weather and the like), if an emergency situation suddenly occurs, the input and the output of the charger can be cut off in time through the button switch SB, so that the safety accident is effectively avoided, the charger has the advantages of small size and high power, and has the advantage of high safety.

Example two

Referring to fig. 3, the present invention discloses a charger for agricultural sowing equipment, which is based on the first embodiment, and the difference between the first embodiment and the second embodiment is as follows: the casing 10 includes a casing 11 with openings at two ends, a plurality of cooling fins 12 are disposed on the outer side wall of the casing 11, it should be noted that the cooling fins 12 are disposed on three outer side walls of the casing 11, and a bottom plate 14 is disposed on one of the bottom walls, and is used for fixing the charger in a vehicle or at other designated positions. One end of the charger, which is provided with the bottom plate 14, is the bottom end of the charger, and the end of the charger, which is opposite to the bottom plate 14, is the top end of the charger.

Referring to fig. 3 and 4, end caps 60 are further disposed at both ends of the housing 11, and the end caps 60 are connected to the housing 11 by screws for sealing openings at both ends of the housing 11. The side wall of the end cover 60 close to the housing 11 is fixedly provided with a clamping block 61, and the two ends of the housing 11 are both provided with clamping grooves 13. The clamping block 61 on each end cover 60 is arranged to be one, the clamping groove 13 is arranged along the circumferential direction of the shell 11 and extends to the inner side wall of the shell 11, and the clamping block 61 extends into the corresponding clamping groove 13 and blocks the corresponding clamping groove 13. After the end cap 60 is fixed, the locking slot 13 is located between the corresponding screw and the corresponding end opening of the housing 11. The edge of the end, extending into the clamping groove 13, of the clamping block 61 is fixedly provided with a sealing washer 62 along the circumferential direction of the clamping groove 13, and the sealing washer 62 abuts against the bottom wall of the clamping groove 13, so that the end cover 60 has a better sealing effect on the openings at the two ends of the shell 11.

Referring to fig. 3 and 5, the latch 61 is shaped like a truncated pyramid, and an annular potting chamber 70 (see fig. 7) is formed between the latch 61 and the side wall and the bottom wall of the corresponding card slot 13. The side wall of the end cover 60 far from the shell 11 is provided with two glue filling holes 63 communicated with the corresponding annular glue filling cavity 70, and the two glue filling holes 63 in each end cover 60 are located at the top end of the side wall of the corresponding end cover 60 far from the shell 11 and used for adding sealing glue into the corresponding annular glue filling cavity 70. It should be noted that the sealing glue in the annular glue filling cavity 70 is low-viscosity flame-retardant heat-conducting sealing glue, preferably, the sealing glue in this embodiment is a 1000-degree high-temperature repairing agent YK-8912, and the curing conditions are as follows: room temperature for 2 hours → heating to 60-80 ℃ for 2-3 hours → heating to 150 ℃ for 2 hours → room temperature.

Referring to fig. 7 and 9, the annular glue filling cavity 70 includes a top cavity 71 close to the top end of the charger, a bottom cavity 72 close to the bottom end of the charger, and two side cavities 73 communicating the top cavity 71 with the bottom cavity 72 to make the annular glue filling cavity 70 annular, a stopper 64 is fixedly disposed on the side wall of the fixture block 61 and located in the top cavity 71, and the two glue filling holes 63 are both communicated with the top cavity 71 and located on two sides of the stopper 64 respectively. The top cavity 71 comprises a first glue injection cavity 74 and a second glue injection cavity 75 which are respectively positioned at two sides of the stop block 64, the first glue injection cavity 74 and the second glue injection cavity 75 are inclined towards the corresponding side cavity 73, and an included angle of 91-95 degrees is formed between each first glue injection cavity 74 and each second glue injection cavity 75 and the corresponding side cavity 73. After the glue in the annular glue filling cavity 70 is solidified, the sealing performance between the openings at the two ends of the shell 11 (refer to fig. 6) and the corresponding end covers 60 (refer to fig. 8) is effectively increased.

The implementation principle of the above embodiment is as follows:

when the end cover 60 is installed, the latch 61 on the end cover 60 is first latched into the corresponding latch slot 13, and then the end cover 60 is firmly fixed with the housing 11 by screws. After the end cover 60 is fixed, sealant water is added into the annular sealant cavity 70 through one of the sealant pouring holes 63 on the end cover 60.

When the sealing glue is added into the annular glue filling cavity 70 from one of the glue filling holes 63 on the end cover 60, the air in the annular glue filling cavity 70 is discharged from the other glue filling hole 63, and the sealing glue cannot flow out from the other glue filling hole 63 due to the blocking of the stop block 64. When the sealing glue flows to another glue filling hole 63 for one circle, the current glue filling hole 63 is sealed by using an adhesive tape or other tools, then glue is filled into the annular glue filling cavity 70 through another glue filling hole 63, the whole annular glue filling cavity 70 is filled with the sealing glue, and the one glue filling hole 63 is also sealed. And finally, curing the sealing glue through the processes of room temperature for 2 hours → heating for 60-80 ℃, keeping for 2-3 hours → heating for 150 ℃, keeping for 2 hours → room temperature. The technical scheme of the invention effectively increases the waterproof sealing performance of the charger, so that the charger has the advantages of small volume and high power, and the safety of the charger is effectively improved.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. The utility model provides an agricultural seeding equipment machine that charges, includes casing (10) and sets up AC-DC full brick power module (20) in casing (10), the inside of AC-DC full brick power module (20) is provided with the embedded CPU who is used for the accurate control machine charging process, its characterized in that: the input end of the AC-DC full-brick power module (20) is connected with a front-end protection module (30), the output end of the AC-DC full-brick power module (20) is connected with a rear-end output module (40) used for filtering direct-current voltage output by the AC-DC full-brick power module (20) into stable direct-current voltage, and the front-end protection module (30) and the rear-end output module (40) are jointly connected with a control module (50) capable of cutting off input and output of a charger;

the shell (10) comprises a shell (11) with openings at two ends, a plurality of radiating fins (12) are arranged on the outer side wall of the shell (11), end covers (60) used for sealing the openings at the end parts of the shell (11) are arranged at two ends of the shell (11), and the end covers (60) are connected with the shell (11) through screws; a clamping block (61) is arranged on the side wall, close to the shell (11), of the end cover (60), and clamping grooves (13) are formed in the two ends of the shell (11); one clamping block (61) is arranged on each end cover (60), and the clamping groove (13) is arranged along the circumferential direction of the shell (11) and extends to the inner side wall of the shell (11); the clamping blocks (61) extend into the corresponding clamping grooves (13) and block the corresponding clamping grooves (13), and the clamping grooves (13) are positioned between the corresponding screws and the corresponding openings at the end parts of the shells (11); a sealing washer (62) which is abutted against the bottom wall of the clamping groove (13) is arranged at the edge of one end, extending into the clamping groove (13), of the clamping block (61) along the circumferential direction of the clamping groove (13);

the fixture block (61) is in a quadrangular frustum pyramid shape, and an annular glue filling cavity (70) is formed between the fixture block (61) and the side wall and the bottom wall of the corresponding clamping groove (13); the side wall, far away from the shell (11), of the end cover (60) is provided with a glue pouring hole (63) communicated with the corresponding annular glue pouring cavity (70), and the glue pouring hole (63) is located at the top end, far away from the shell (11), of the side wall of the corresponding end cover (60) and used for adding sealing glue into the annular glue pouring cavity (70);

the annular glue filling cavity (70) comprises a top cavity (71) close to the top end of the charger, a bottom cavity (72) close to the bottom end of the charger, and two side cavities (73) which enable the top cavity (71) and the bottom cavity (72) to be communicated and enable the annular glue filling cavity (70) to be annular; the side wall of the fixture block (61) is provided with two stopper blocks (64) in the top cavity (71), and the two glue pouring holes (63) are communicated with the top cavity (71) and are respectively positioned on two sides of the stopper blocks (64);

the top cavity (71) comprises a first glue injection cavity (74) and a second glue injection cavity (75) which are respectively positioned on two sides of the stop block (64), wherein the first glue injection cavity (74) and the second glue injection cavity (75) are inclined towards the corresponding side cavity (73) and form an obtuse angle with an included angle between the corresponding side cavities (73).

2. The agricultural sowing equipment charger according to claim 1, characterized in that: the front-end protection module (30) comprises a fuse, a common-mode inductor, a first capacitor, a second capacitor and a third capacitor, wherein the first capacitor, the second capacitor and the third capacitor are nonpolar capacitors, and the common-mode inductor comprises a first inductance coil and a second inductance coil; one end of the fuse is connected with a live wire, and the other end of the fuse is connected with one pole of the first capacitor and one end of the first inductance coil of the common-mode inductor; the other pole of the first capacitor is connected with a zero line and one end of a second inductance coil of the common-mode inductor; the other end of the first inductance coil of the common-mode inductor is connected with one pole of a second capacitor and a live wire end of the AC-DC full-brick power module (20), and the other end of the second inductance coil of the common-mode inductor is connected with one pole of a third capacitor and a zero wire end of the AC-DC full-brick power module (20); the other pole of the second capacitor and the other pole of the third capacitor are both connected with the ground wire and the ground wire end of the AC-DC full-brick power module (20).

3. The agricultural sowing equipment charger according to claim 2, characterized in that: the front-end protection module (30) further comprises a thermistor and a piezoresistor; the thermistor is arranged on a circuit connected with the fuse and the first capacitor, and the first capacitor is connected with the thermistor in parallel; one end of the piezoresistor is connected with one pole of the first capacitor, and the other end of the piezoresistor is connected with the other pole of the first capacitor.

4. The agricultural sowing equipment charger according to claim 3, characterized in that: the rear-end output module (40) comprises a fourth capacitor, a fifth capacitor and a transient suppressor, wherein the fourth capacitor is a polar capacitor, and the fifth capacitor is a non-polar capacitor; the anode of the fourth capacitor, one pole of the fifth capacitor and one end of the transient suppressor are connected with the output anode of the AC-DC full-brick power module (20), and the end of the transient suppressor connected with the output anode of the AC-DC full-brick power module (20) is the anode output end of the charger; the cathode of the fourth capacitor, the other pole of the fifth capacitor and the other end of the transient suppressor are connected with the output cathode of the AC-DC full-brick power module (20), and the end, connected with the output cathode of the AC-DC full-brick power module (20), of the transient suppressor is the cathode output end of the charger.

5. The agricultural sowing equipment charger according to claim 4, characterized in that: the control module (50) comprises an AC-DC switching power supply (51), a button switch, a first intermediate relay and a second intermediate relay, wherein the AC-DC switching power supply (51) comprises an alternating current input end and a direct current output end, the first intermediate relay comprises a first normally closed contact and a second normally closed contact, and the second intermediate relay comprises a third normally closed contact and a fourth normally closed contact;

the positive pole of the alternating current input end of the AC-DC switching power supply (51) is connected to a live wire, and the negative pole of the alternating current input end of the AC-DC switching power supply (51) is connected to a zero wire; the positive electrode of the direct current output end of the AC-DC switching power supply (51) is connected to one end of a button switch, and the other end of the button switch is connected to one end of a coil of a first intermediate relay and one end of a coil of a second intermediate relay; the other end of the coil of the first intermediate relay and the other end of the coil of the second intermediate relay are both connected to the negative electrode of the direct current output end of the AC-DC switching power supply (51);

6. The agricultural sowing equipment charger according to claim 5, characterized in that: the control module (50) further comprises an indicator light and a protective resistor, one end of the indicator light and one end of the protective resistor are both connected to one end of the coil of the first intermediate relay, and the other end of the indicator light and the other end of the protective resistor are both connected to the other end of the coil of the first intermediate relay.