CN118677260A - Portable electromagnetic driving nail gun and direct current boost charging system thereof - Google Patents
Portable electromagnetic driving nail gun and direct current boost charging system thereof Download PDFInfo
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- CN118677260A CN118677260A CN202410972131.XA CN202410972131A CN118677260A CN 118677260 A CN118677260 A CN 118677260A CN 202410972131 A CN202410972131 A CN 202410972131A CN 118677260 A CN118677260 A CN 118677260A
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- 239000003990 capacitor Substances 0.000 claims abstract description 67
- 238000004146 energy storage Methods 0.000 claims abstract description 10
- 230000009466 transformation Effects 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000007599 discharging Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 abstract 1
- 230000000630 rising effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 239000011162 core material Substances 0.000 description 1
- 230000005288 electromagnetic effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The invention discloses a portable electromagnetic driving nail gun and a direct current boost charging system thereof, wherein the system at least comprises three modules and three transformers; the energy storage module outputs low-voltage direct current to primary sides of all transformers, the electricity on each primary side is independently controlled by a switch of the control module to form chopping waves, secondary sides of all transformers are connected in series and then are rectified by the rectifying module to be output to charge a capacitor; the charging process of the capacitor is divided into two stages by taking the capacitor voltage rising to the target voltage as a boundary, the transformation of the first transformer and the second transformer is configured to at least reach the target voltage through the series connection of the secondary side output voltages of the first transformer and the second transformer, and the transformation of the third transformer is configured to at least reach the final charging voltage of the capacitor; the control module is used to switch the transformer for boost charging of the capacitor in two phases. The portable nail gun provided by the invention can ensure higher charging speed in the first stage and can realize the charging target of large voltage of the capacitor in the second stage.
Description
Technical Field
The invention relates to the technical field of nail guns, in particular to a portable electromagnetic driving nail gun and a direct current boosting charging system thereof.
Background
Nail guns are a common type of nailing device, including electromagnetic nail guns, pneumatic nail guns, mechanical nail guns, and the like. Because the force applied by the pneumatic nail gun and the mechanical nail gun is smaller, only small nails can be driven, and the electromagnetic nail gun can provide larger driving force and can drive large nails (50-90 mm in diameter).
Patent 201520580802.4 discloses an electromagnetic nailing gun, which firstly converts direct current of a battery pack into high-frequency alternating current, then converts the high-frequency alternating current into high-voltage direct current through a transformer to charge a capacitor, and after the capacitor is fully charged, the coil is discharged to trigger an electromagnetic effect to drive nailing. However, the volume of the transformer is related to the turn ratio and the working power interval, when the turn ratio is larger and the working power interval is larger, the iron core material and the number of winding coils needed by the transformer are larger, so that the volume is larger, the whole charging process is boosted by the transformer, and the volume of the transformer is larger, and the iron core and the coils of the transformer occupy a certain weight of the nail gun, so that the whole nail gun is not beneficial to portability of the nail gun; in addition, the capacitor is charged to the target voltage through one transformer, the charging speed is slow, and if the target voltage is required to be increased, the volume and the weight of the transformer are increased.
Disclosure of Invention
The invention aims to solve the technical problem of providing a portable electromagnetic driving nail gun and a direct current boosting charging system thereof, which not only ensure small and portable size, but also ensure higher charging speed in a first stage and realize the charging target of large voltage of a capacitor in a second stage.
To solve the above-mentioned technical problem, a first aspect of the present invention discloses a dc boost charging system of a portable electromagnetic driving nailer configured to impart kinetic energy to nailing by discharging a capacitor to a coil, for charging the capacitor, wherein:
the direct current boost charging system at least comprises a control module, an energy storage module, a rectifying module, a first transformer, a second transformer and a third transformer;
The energy storage module is configured to output low-voltage direct current to primary sides of all transformers, electric energy on each primary side is independently controlled by a switch of the control module to form chopping waves, and secondary sides of all transformers are connected in series and then are rectified by the rectifying module to be output to charge a capacitor;
The charging process of the capacitor is divided into two stages by taking the capacitor voltage as a boundary, the transformation of the first transformer and the second transformer is configured to at least reach the target voltage through the series connection of the secondary side output voltages of the first transformer and the second transformer, and the transformation of the third transformer is configured to at least reach the final charging voltage of the capacitor;
The control module is used for controlling the first transformer and the second transformer to charge the charger together in the first stage, and switching to the third transformer to charge in the second stage.
As an alternative embodiment, the low voltage dc is 12-72V.
As a further alternative embodiment, the energy storage module is formed by connecting high-discharge-rate batteries in series and/or in parallel.
As yet another alternative embodiment, the target voltage is 200-450V.
As yet another alternative embodiment, the final voltage is 450-550V.
As a further alternative embodiment, the capacitor is formed by connecting a plurality of capacitors in parallel.
As yet another alternative embodiment, the control module is based on a voltage detection of the capacitor as a condition of the judging phase or on a charging time of the capacitor as a condition of the judging phase.
As yet another alternative embodiment, the capacitor has a capacity of 500-3000 μF and a rated voltage of 450-600V.
A second aspect of the embodiments of the present invention discloses a portable electromagnetic driven nail gun, comprising a dc boost charging system according to the first aspect of the embodiments of the present invention.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
According to the embodiment of the invention, the three transformers are designed to enable the capacitor to be smaller in volume and weight and convenient to carry, and the two charging stages are designed to ensure higher charging speed in the first stage and realize the charging target of large voltage of the capacitor in the second stage, so that the driving of the large nail is facilitated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a portion of a DC boost charging system for a portable electromagnetic drive nailer according to an embodiment of the present invention;
Fig. 2 is a schematic structural diagram of a PWM chip of a dc boost charging system of a portable electromagnetic driving nail gun according to an embodiment of the present invention;
Fig. 3 is a schematic structural diagram of a control chip of a dc boost charging system of a portable electromagnetic driving nail gun according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a voltage transformation power supply circuit of a PWM chip and a control chip according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1, an embodiment of the present invention discloses a dc boost charging system of a portable electromagnetic driven nailer configured to impart kinetic energy to a nail by discharging a capacitor to a coil, for charging the capacitor, wherein:
The direct-current boost charging system at least comprises a control module, an energy storage module, a rectification module D, a first transformer A, a second transformer B and a third transformer C;
The energy storage module is configured to output low-voltage direct current to primary sides of all transformers, electric energy on each primary side is independently controlled by a switch of the control module to form chopping waves, and secondary sides of all transformers are connected in series and then are rectified by the rectifying module to be output to charge a capacitor;
The charging process of the capacitor is divided into two stages by taking the capacitor voltage as a boundary, the transformation of the first transformer and the second transformer is configured to at least reach the target voltage through the series connection of the secondary side output voltages of the first transformer and the second transformer, and the transformation of the third transformer is configured to at least reach the final charging voltage of the capacitor;
The control module is used for controlling the first transformer and the second transformer to charge the charger together in the first stage, and switching to the third transformer to charge in the second stage.
For example, referring to fig. 1, after capacitor C4 in fig. 1 is discharged at maximum discharge power, the voltage drops to about 230V, and a high discharge rate battery or a high discharge rate battery pack is used to output 24V low voltage dc to the primary sides of three transformers, the secondary sides of which are connected in series. The two transformers boost 24V to about 230V, the turns ratio of each transformer is about 10:100, and the total boost is about 450V after the two transformers are connected in series, which is the first stage, the capacitor C4 is charged from 230V to 450V in the first stage, and when the voltage of the capacitor is lower, the charging current of the capacitor can be higher by using higher charging voltage, so that higher charging efficiency is realized under higher charging voltage and charging current; compared with the existing single-transformer boosting mode, for example, the single-transformer boosting mode is used for directly boosting from 230V to 550V (the turns ratio is about 24:550), the turns ratio difference of the transformer is smaller, and meanwhile, the sum of the power of the two transformers is smaller (the output voltage and the output current are smaller), so that the volume of the single transformer is much smaller. In the second phase, the other transformer steps up 24V to about 550V with a turns ratio of about 24:550, and in this phase, capacitor C4 is charged from 450V to 550V, and the power and volume of the transformer are smaller because the output current of the transformer is smaller (the more the internal charges in the capacitor accumulate, the larger the internal resistance) compared to the conventional single-transformer step-up method, such as directly stepping up from 230V to 550V. Through transformer design and experimental verification, the sum of the volumes of the three transformers is reduced by about 50% compared with the volume and weight of the existing single transformer.
According to the embodiment of the invention, the three transformers are designed to enable the capacitor to be smaller in volume and weight and convenient to carry, and the two charging stages are designed to ensure higher charging speed in the first stage and realize the charging target of large voltage of the capacitor in the second stage, so that the driving of the large nail is facilitated.
In an alternative embodiment, the low voltage direct current is 12-72V. As a power source for a portable nail gun, its volume and weight should not greatly affect portability, so this embodiment limits its range to lower values.
In yet another alternative embodiment, the energy storage module is formed by high discharge rate batteries in series and/or parallel.
In yet another alternative embodiment, the target voltage is 200-450V. When the voltage of the capacitor is low, the charging current of the capacitor can be higher by using a higher charging voltage, so that higher charging efficiency is realized under the higher charging voltage and charging current, and as the charging efficiency is increased by the voltage of the capacitor, the charging efficiency is lower and lower, and the target voltage of the embodiment can be a change inflection point of the charging speed of the selected capacitor (the charging speed of the capacitor before the inflection point is in a preset range, and the charging speed is reduced to be out of the preset range after the voltage exceeds the inflection point) through experimental verification, so that the higher charging speed of the first stage is ensured. The transformer requires less output power, and is smaller in volume and weight than if it were directly boosted to the final voltage.
In yet another alternative embodiment, the final voltage is 450-550V. The final voltage is a voltage value required for electromagnetic force capable of driving a large nailing (50-90 mm diameter) to provide a sufficient driving force.
In yet another alternative embodiment, the capacitor is formed by a plurality of capacitors connected in parallel; when the capacitor discharges, the output current of the capacitor is increased, and the fast discharging is realized.
In yet another alternative embodiment, the control module is based on voltage detection of the capacitor as a condition for the determination phase. Specifically, the voltage of the capacitor is monitored in real time, the capacitor is determined to be in a first stage when the voltage of the capacitor does not reach the target voltage, and the capacitor is determined to be in a second stage when the voltage of the capacitor is found to reach the target voltage.
In yet another alternative embodiment, the control module is based on a charge time of the capacitor as a condition for the determination phase. Specifically, the reference time length required when the voltage of the capacitor reaches the target voltage is determined based on the voltage of the capacitor, and then the first stage is determined based on the reference time length as a condition of the judging stage, namely, the charging time length is not up to the reference time length, and the second stage is determined after the reference time length is up to.
The control module comprises a PWM chip and a control chip, see fig. 2 and 3. Fig. 4 is a voltage transformation power supply circuit of the PWM chip and the control chip, transforming the 24V input power into 5V and 15V, wherein the PWM chip is supplied with 15V power and the control chip is supplied with 5V power.
In yet another alternative embodiment, the capacitor has a capacity of 500-3000 μF and a rated voltage of 450-600V.
Example two
The embodiment of the invention discloses a portable electromagnetic driving nail gun, which comprises a direct current boost charging system as in the first embodiment.
The disclosure of the embodiments of the present invention is merely a preferred embodiment of the present invention, and is merely for illustrating the technical scheme of the present invention, but not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that; the technical scheme recorded in the various embodiments can be modified or part of technical features in the technical scheme can be replaced equivalently; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (9)
1. A dc boost charging system for a portable electromagnetic drive nailer configured to impart kinetic energy to a nail by discharging a capacitor to a coil, the dc boost charging system for charging the capacitor, characterized by:
the direct current boost charging system at least comprises a control module, an energy storage module, a rectifying module, a first transformer, a second transformer and a third transformer;
The energy storage module is configured to output low-voltage direct current to primary sides of all transformers, electric energy on each primary side is independently controlled by a switch of the control module to form chopping waves, and secondary sides of all transformers are connected in series and then are rectified by the rectifying module to be output to charge a capacitor;
The charging process of the capacitor is divided into two stages by taking the capacitor voltage as a boundary, the transformation of the first transformer and the second transformer is configured to at least reach the target voltage through the series connection of the secondary side output voltages of the first transformer and the second transformer, and the transformation of the third transformer is configured to at least reach the final charging voltage of the capacitor;
The control module is used for controlling the first transformer and the second transformer to charge the charger together in the first stage, and switching to the third transformer to charge in the second stage.
2. The dc boost charging system of claim 1, wherein the low voltage dc is 12-72V.
3. The direct current boost charging system of claim 2, wherein the energy storage module is formed by high discharge rate batteries connected in series and/or in parallel.
4. The direct current boost charging system of claim 1, wherein the target voltage is 200-450V.
5. The dc boost charging system of claim 4, wherein the final voltage is 450-550V.
6. The dc boost charging system of claim 1, wherein the capacitor is formed by a plurality of capacitors in parallel.
7. The direct current boost charging system of claim 1, wherein the control module is based on a voltage detection of the capacitor as a condition of a judgment phase or based on a charging time of the capacitor as a condition of a judgment phase.
8. The direct current boost charging system of claim 1, wherein the capacitor has a capacity of 500-3000 μf and a rated voltage of 450-600V.
9. A portable electromagnetic drive nailer comprising a dc boost charging system as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410972131.XA CN118677260A (en) | 2024-07-19 | 2024-07-19 | Portable electromagnetic driving nail gun and direct current boost charging system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410972131.XA CN118677260A (en) | 2024-07-19 | 2024-07-19 | Portable electromagnetic driving nail gun and direct current boost charging system thereof |
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| Publication Number | Publication Date |
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| CN118677260A true CN118677260A (en) | 2024-09-20 |
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| CN202410972131.XA Pending CN118677260A (en) | 2024-07-19 | 2024-07-19 | Portable electromagnetic driving nail gun and direct current boost charging system thereof |
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| CN (1) | CN118677260A (en) |
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