A DC / DC power conversion circuit

Abstract

The invention relates to the technical field of DC / DC line protection, and discloses a DC / DC power conversion circuit, comprising: a main body shell, one side of the main body shell is fixedly connected with an interface, a cavity is opened inside the main body shell, and a radiation protection plate is fixedly connected in the cavity; a limiting mechanism, the limiting mechanism is arranged inside the main body shell, and the limiting mechanism comprises a filter fixedly connected to an inner wall of the main body shell near the interface; and a protection mechanism, the protection mechanism is arranged inside the main body shell. The DC / DC power conversion circuit is connected with the filter at the input end of the DC / DC power conversion circuit, so that the filter can remove electromagnetic interference generated when the DC / DC power conversion circuit is working, reduce the negative impact of the DC / DC power conversion circuit on other surrounding electronic components when working, and thus increase the application range of the DC / DC power conversion circuit.

Description

Technical Field

[0001] The invention relates to the technical field of DC / DC line protection, in particular to a DC / DC power conversion circuit. Background Art

[0002] DC / DC is a device that can convert a DC power supply of a certain voltage level into a DC power supply of another voltage level. The meaning of DC / DC is to convert a fixed DC voltage into a variable DC voltage. As long as it meets this definition, it can be called a DC / DC converter. Specifically, it means to convert the input DC power into AC power through a self-excited oscillation circuit, and then convert it into DC power output after changing the voltage through a transformer, or convert AC power into high-voltage DC power output through a voltage doubler rectifier circuit.

[0003] The existing DC / DC power conversion circuit contains multiple electronic components to achieve the adjustment and conversion of electric energy. At the same time, the DC / DC converter usually controls the conversion of electric energy through switching elements. These switching operations will cause electromagnetic interference problems. Electromagnetic interference may have an adverse effect on nearby electronic equipment and wireless communication systems. When installing filtering devices such as filters in the existing DC / DC converter, the installer usually directly connects the filter to the input end of the DC / DC converter, but ignores the relative position of the filter and the position of the output and input lines of the filter, which may reduce the filtering effect of the filter.

[0004] At the same time, the DC / DC converter containing the DC / DC circuit is generally in the shape of a box, and because the DC / DC conversion circuit contains a large number of electronic components, the DC / DC converter is heavy, which makes it difficult to move the entire DC / DC converter, which can easily cause damage to the circuit boards and electronic components in the DC / DC conversion circuit, affecting the normal use of the DC / DC conversion circuit. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies of the prior art, the present invention provides a DC / DC power conversion circuit, which solves the problems raised in the above background technology.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: A DC / DC power conversion circuit, comprising:

[0009] A main body shell, one side of which is fixedly connected to an interface, a cavity is opened inside the main body shell, and a radiation protection plate is fixedly connected inside the cavity;

[0010] A limiting mechanism, the limiting mechanism is arranged inside the main body shell, the limiting mechanism includes a filter fixedly connected to the inner wall of the main body shell near the interface, and the limiting mechanism is used to limit the position of the pipeline inside the main body shell;

[0011] The protection mechanism is arranged inside the main body shell, and the protection mechanism includes a DC / DC box slidably connected inside the main body shell. The protection mechanism is used to provide a buffering effect for its internal components.

[0012] Preferably, an output pipeline is fixedly connected to a side of the filter close to the DC / DC box, an end of the output pipeline away from the filter is fixedly connected to the DC / DC box, a pipe sleeve is slidably connected to the outside of the output pipeline, an input pipeline is fixedly connected to the top of the filter, and the input pipeline extends to the outside of the main shell and is located inside the interface, so that the filter can remove clutter in the external power supply, thereby protecting the DC / DC power conversion circuit. At the same time, the output end of the DC / DC power conversion circuit is also connected to the filter, so that the filter can remove clutter, voltage fluctuations and electromagnetic interference generated by the DC / DC power conversion circuit.

[0013] Preferably, the pipe sleeve is slidably connected with an outer connecting rod on one side near the interface, and the inner side of one end of the outer connecting rod near the output pipeline is rotatably connected with a friction wheel, and the friction wheel is fixedly connected with a transmission tooth rod on the side away from the pipe sleeve, and the transmission tooth rod extends to the outside of the outer connecting rod and is meshed with a transmission gear at the bottom, and the transmission gear is connected with a transmission ratchet gear through a belt transmission, and the side of the transmission ratchet gear away from the transmission gear is meshed with a connecting ratchet gear, and the transmission tooth rod, transmission gear, transmission ratchet gear and connecting ratchet gear are respectively rotatably connected to a fixed plate extending upward from the bottom inner side of the main shell, and the connecting ratchet gear is rotatably connected with a transmission rotating block on one side away from the transmission ratchet gear, and a torsion spring is fixedly connected to an upper and lower reciprocating block on the side away from the transmission rotating block, and the bottom of the upper and lower reciprocating blocks is fixedly connected with a transmission spring, and one end of the transmission spring away from the upper and lower reciprocating blocks is fixedly connected to the inner bottom of the main shell, and the outer side of the upper and lower reciprocating blocks is slidably connected to a limited outer plate.

[0014] Preferably, the friction wheel extends to the inside of the pipe sleeve, and the output pipeline has a margin and is in a bent state, so that when the DC / DC box is lifted, the output pipeline has a margin to move upward a certain distance following the DC / DC box, thereby avoiding the problem that the output pipeline is not long enough to move with the DC / DC box and hinder the movement of the DC / DC box.

[0015] Preferably, a gear shaft is meshingly connected to the bottom of the tube sleeve, one side of the gear shaft is rotatably connected to the inner wall of the main shell, and the other side of the gear shaft extends to the outside of the main shell, and the other side of the gear shaft extending to the outside of the main shell is fixedly connected to a torsion wheel, and a return spring is fixedly connected to the same side of the main shell as the torsion wheel, and a friction rod is fixedly connected to one end of the return spring away from the main shell, the friction rod is rotatably connected to the main shell, and the end of the friction rod close to the torsion wheel is fitted to the outside of the torsion wheel.

[0016] Preferably, a fixed connecting rod is fixedly connected to the top of the DC / DC box, the fixed connecting rod extends upward to the outside of the main shell and is rotatably connected to a handle, contact blocks are fixedly connected to the upper and lower sides of the four corners of the bottom of the DC / DC box, a DC / DC circuit board is fixedly connected inside the DC / DC box, and the filter is connected to the input end of the DC / DC circuit board through an output pipeline.

[0017] Preferably, an upper compression rod is fixedly connected to the outer side of one end of the fixed connecting rod located between the main shell and the DC / DC box, a lower compression rod is fixedly connected to the bottom of the DC / DC box, an upper sealing sleeve is fixedly connected to the top of the inner cavity of the main shell, and a lower sealing sleeve is fixedly connected to the bottom of the inner cavity of the main shell, the upper compression rod is located inside the upper sealing sleeve and is slidably connected to the upper sealing sleeve, the lower compression rod is located inside the lower sealing sleeve and is slidably connected to the lower sealing sleeve, and the interiors of the upper sealing sleeve and the lower sealing sleeve are in a sealed state.

[0018] Preferably, a fixed rectangular plate is fixedly connected to the bottom inner side of the main shell at the four corners of the DC / DC box, a rotation limit block is rotatably connected to the top of the fixed rectangular plate, a return spring is fixedly connected to the bottom of the rotation limit block on a side away from the DC / DC box, and one end of the return spring away from the rotation limit block is fixedly connected to the fixed rectangular plate, so that the rotation limit block can prevent the DC / DC box from being displaced as the electronic components inside the DC / DC box vibrate, thereby protecting the DC / DC box and the DC / DC circuits inside the DC / DC box.

[0019] Preferably, when the air inside the lower sealing sleeve is compressed to the limit, the bottom of the DC / DC box just enters the bottom of the rotation limit block and is clamped by the rotation limit block.

[0020] (III) Beneficial effects

[0021] The DC / DC power conversion circuit provided by the present invention has the following beneficial effects:

[0022] 1. A DC / DC power conversion circuit is connected to a filter at the input end of the DC / DC power conversion circuit, so that the filter can remove the electromagnetic interference generated by the DC / DC power conversion circuit when it is working, thereby reducing the negative impact of the DC / DC power conversion circuit on other surrounding electronic components when it is working, thereby increasing the application scope of the DC / DC power conversion circuit.

[0023] 2. This DC / DC power conversion circuit drives the friction wheel to rotate counterclockwise through the matching connection between the components in the limit mechanism, and continuously applies friction force to the output pipeline in the direction away from the input pipeline, thereby avoiding the problem that the high-frequency interference generated by the DC / DC circuit board due to the output pipeline being too close to the input pipeline can be directly coupled through the parasitic capacitance between the input and output lines, bypassing the filter and making the filtering effect of the filter worse.

[0024] 3. This DC / DC power conversion circuit is connected by the upper and lower reciprocating blocks and the connecting ratchet gear and the matching connection between the components thereon, so that when the transmission rotating block connected to the connecting ratchet gear slides upward or downward, the connecting ratchet gear can only rotate counterclockwise, so that after the transmission of the transmission ratchet gear, the transmission gear and the transmission gear rod, the friction wheel always rotates counterclockwise, thereby continuously providing friction force for the output pipeline away from the input pipeline.

[0025] 4. This DC / DC power conversion circuit uses the vibration generated by the main casing when the DC / DC power conversion circuit is working as power to drive the operation of the entire limit mechanism, thereby avoiding the need to install an external motor, thereby avoiding the problem of the DC / DC power conversion circuit emitting electromagnetic interference to the outside when working, thereby causing damage to the motor.

[0026] 5. A DC / DC power conversion circuit compresses the air inside the upper sealing sleeve through the upper compression rod and the air inside the lower sealing sleeve through the lower compression rod, so that when the main shell is lifted and moved again, the DC / DC box can be in the middle of the inner side of the main shell without contacting other objects, thereby avoiding the DC / DC box from contacting and colliding with other objects during the movement and causing damage, thereby protecting the safety of the DC / DC conversion circuit and the electronic components contained in the DC / DC circuit. At the same time, when the main shell is placed, the compressed air inside the lower sealing sleeve also applies an upward force to the DC / DC box, thereby delaying the speed at which the DC / DC box falls downward, avoiding the DC / DC box from falling too fast and causing falling damage to the DC / DC conversion circuit inside the DC / DC box. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1This is a circuit diagram of a DC / DC power conversion circuit of the present invention;

[0028] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the top structure of the inner side of the main housing of the present invention;

[0030] Figure 4 It is a schematic diagram of the inner side structure of the main body shell of the present invention;

[0031] Figure 5 It is a schematic diagram of the structural limiting mechanism and the protection mechanism of the present invention;

[0032] Figure 6 It is a schematic diagram of the overall structure of the limiting mechanism of the present invention;

[0033] Figure 7 It is a schematic diagram of the side structure of the limiting mechanism of the present invention;

[0034] Figure 8 For the present invention Figure 7 The enlarged structural diagram at A in the middle;

[0035] Fig. 9 It is a schematic diagram of the connection structure of the outer connecting rod, friction wheel, transmission gear, transmission ratchet gear, connection ratchet gear, upper and lower reciprocating blocks, transmission spring and limit outer plate of the present invention;

[0036] Fig.10 It is a schematic diagram of the connection structure of the upper and lower reciprocating blocks, torsion springs, transmission rotating blocks and transmission springs of the present invention;

[0037] Fig.11 It is a schematic diagram of the pipe sleeve, the outer connecting rod, the friction wheel, the transmission gear rod and the connecting structure of the present invention;

[0038] Fig.12 It is a schematic diagram of the pipe sleeve, outer connecting rod, friction wheel and side structure of the present invention;

[0039] Fig.13 For the present invention Figure 1 The enlarged structural diagram at B in the middle;

[0040] Fig.14 For the present invention Figure 5 The enlarged structural diagram at C in the middle;

[0041] Fig.15 It is a schematic diagram of the connection structure of the DC / DC box, the contact block and the lower compression rod of the present invention.

[0042] In the figure: 1, main body shell; 11, interface; 12, radiation protection plate; 13, upper sealing sleeve; 14, lower sealing sleeve;

[0043] Limiting mechanism: 2, filter; 21, input pipeline; 22, pipe sleeve; 221, outer connecting rod; 222, friction wheel; 223, transmission gear rod; 23, gear shaft; 231, torsion wheel; 24, friction rod; 241, return spring; 25, transmission gear; 26, transmission ratchet gear; 27, connecting ratchet gear; 28, up and down reciprocating block; 281, torsion spring; 282, transmission rotating block; 283, transmission spring; 284, limiting outer plate; 29, output pipeline;

[0044] Protection mechanism: 3, DC / DC box; 31, fixed connecting rod; 311, upper compression rod; 32, handle; 33, contact block; 34, fixed rectangular plate; 341, rotation limit block; 342, reset spring; 35, lower compression rod. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1

[0046] refer to Figures 1 to 13 A DC / DC power conversion circuit according to a preferred embodiment of the present invention will be described in detail below:

[0047] include:

[0048] A main body shell 1, one side of which is fixedly connected to an interface 11, a cavity is provided inside the main body shell 1, and a radiation protection plate 12 is fixedly connected inside the cavity;

[0049] The limiting mechanism is arranged inside the main housing 1, and includes a filter 2 fixedly connected to the inner wall of the main housing 1 near the interface 11. The limiting mechanism is used to limit the position of the pipeline inside the main housing 1;

[0050] The protection mechanism is arranged inside the main housing 1. The protection mechanism includes a DC / DC box 3 which is slidably connected inside the main housing 1. The protection mechanism is used to provide a buffering effect for the internal components.

[0051] An output pipeline 29 is fixedly connected to one side of the filter 2 close to the DC / DC box 3, and an end of the output pipeline 29 away from the filter 2 is fixedly connected to the DC / DC box 3. A pipe sleeve 22 is slidably connected to the outside of the output pipeline 29. An input pipeline 21 is fixedly connected to the top of the filter 2. The input pipeline 21 extends to the outside of the main shell 1 and is located inside the interface 11, so that the filter 2 can remove noise in the external power supply, thereby protecting the DC / DC power conversion circuit. At the same time, the output end of the DC / DC power conversion circuit is also connected to the filter 2, so that the filter 2 can remove noise, voltage fluctuations and electromagnetic interference generated by the DC / DC power conversion circuit.

[0052] The side of the pipe sleeve 22 close to the interface 11 is slidably connected with an outer connecting rod 221, and the inner side of the end of the outer connecting rod 221 close to the output pipeline 29 is rotatably connected with a friction wheel 222. The side of the friction wheel 222 away from the pipe sleeve 22 is fixedly connected with a transmission gear rod 223. The transmission gear rod 223 extends to the outside of the outer connecting rod 221 and is meshed with a transmission gear 25 at the bottom. The transmission gear 25 is connected to a transmission ratchet gear 26 through a belt drive. The transmission ratchet gear 26 is meshed with a connecting ratchet gear 27 away from the transmission gear 25. The transmission gear rod 223, the transmission gear 25, and the transmission ratchet gear 27 are connected to the transmission gear 25. The gear 26 and the connecting ratchet gear 27 are respectively rotatably connected to the fixed plate extending upward from the bottom inner side of the main shell 1; the connecting ratchet gear 27 is rotatably connected to a transmission rotating block 282 on the side away from the transmission ratchet gear 26; a torsion spring 281 is fixedly connected to one side of the transmission rotating block 282; a torsion spring 281 is fixedly connected to the side away from the transmission rotating block 282 with an upper and lower reciprocating block 28; a transmission spring 283 is fixedly connected to the bottom of the upper and lower reciprocating blocks 28; one end of the transmission spring 283 away from the upper and lower reciprocating blocks 28 is fixedly connected to the bottom inner side of the main shell 1; and a limited outer plate 284 is slidably connected to the outer side of the upper and lower reciprocating blocks 28.

[0053] The friction wheel 222 extends to the inside of the pipe sleeve 22, and the output pipeline 29 has a margin and is in a bent state, so that when the DC / DC box 3 is lifted, the output pipeline 29 has a margin to move upward a certain distance with the DC / DC box 3, thereby avoiding the problem that the output pipeline 29 is not long enough to move with the DC / DC box 3 and hinder the movement of the DC / DC box 3.

[0054] A gear shaft 23 is meshedly connected to the bottom of the pipe sleeve 22, one side of the gear shaft 23 is rotatably connected to the inner wall of the main shell 1, and the other side of the gear shaft 23 extends to the outside of the main shell 1, and the other side of the gear shaft 23 extending to the outside of the main shell 1 is fixedly connected to a torsion wheel 231, and a return spring 241 is fixedly connected to the same side of the main shell 1 as the torsion wheel 231, and the end of the return spring 241 away from the main shell 1 is fixedly connected to a friction rod 24, the friction rod 24 is rotatably connected to the main shell 1, and the end of the friction rod 24 close to the torsion wheel 231 is fitted to the outside of the torsion wheel 231.

[0055] The following is the entire working process and working principle of the above embodiment:

[0056] The working principle of the DC / DC converter is based on the control of electromagnetic induction and electronic components. It realizes the conversion and stable output of DC voltage through four steps: stabilization of the input voltage of the DC / DC power conversion circuit, switching of switching elements, voltage conversion, and stabilization of the output voltage.

[0057] When installing filter 2 next to DC / DC, attention should be paid to the installation method, installation position and the position of the connection line after installation of filter 2. If the installation method, installation position and the position of the connection line of filter 2 are wrong, the working effect of filter 2 may be reduced and other surrounding electronic equipment may be damaged.

[0058] For example, when the input line of the filter 2 is too long, the filter 2 will not be able to clear the harmonics and unnecessary frequency components generated by the DC / DC in time, and the interference that the filter 2 cannot clear in time will interfere with the DC / DC circuit board inside the DC / DC box 3 through spatial coupling, and the interference generated by the DC / DC circuit board will be directly coupled to the input line of the filter 2, and then transmitted to the outside of the main housing 1, causing excessive electromagnetic emissions.

[0059] When the input and output ends of the filter 2 are too close, the high-frequency interference generated by the DC / DC circuit board can be directly coupled through the parasitic capacitance between the input and output lines, bypassing the filter 2 and making the filtering effect of the filter 2 worse.

[0060] Therefore, when installing and using the filter 2 , it is necessary to make the output end of the filter 2 , that is, the input pipeline 21 , shorter, and isolate the input end and the output end of the filter 2 .

[0061] Since the DC / DC circuit board is connected to a variety of electronic components, when the DC / DC circuit board is working, the various electronic components will generate magnetic force, and the magnetic force will attract the current inside the electronic components, thereby generating vibration.

[0062] From this we can know the working process and principle of the limit mechanism:

[0063] Initial state: the end of the input pipeline 21 away from the filter 2 is in the interface 11 outside the main housing 1, and the radiation protection plate 12 in the main housing 1 always prevents the electromagnetic interference emitted outward by the DC / DC power conversion circuit.

[0064] The vibration generated by the DC / DC circuit board is transmitted to the transmission spring 283 through the main body shell 1, and the transmission spring 283 is vibrated and swings up and down in the vertical direction on the inner side of the limiting outer plate 284, thereby driving the upper and lower reciprocating block 28 fixedly connected at one end of its top to swing up and down in the vertical direction. Since the transmission rotating block 282 is connected to the upper and lower reciprocating block 28 through the torsion spring 281, at the same time, the transmission rotating block 282 is rotationally connected to the connecting ratchet gear 27, and since the connecting ratchet gear 27 is a ratchet gear, it has the characteristic of unidirectional rotation. Fig. 9 It can be seen that when the up and down reciprocating block 28 drives the transmission rotating block 282 to move upward, the transmission rotating block 282 contacts the curved side of the outer side of the ratchet teeth of the connecting ratchet gear 27. At this time, the torsion spring 281 is twisted, so that the force of the transmission rotating block 282 contacting the curved surface of the filter 2 cannot drive the filter 2 to rotate. When the up and down reciprocating block 28 moves downward, the transmission rotating block 282 contacts the inner side of the ratchet teeth of the connecting ratchet gear 27, so that the transmission rotating block 282 enters the inner side of the ratchet teeth of the connecting ratchet gear 27 and is stuck on the inner side of the ratchet teeth to drive the connecting ratchet gear 27 to rotate counterclockwise. Therefore, the up and down swinging of the up and down reciprocating block 28 in the vertical direction can drive the connecting ratchet gear 27 to rotate only counterclockwise. When the connecting ratchet gear 27 rotates counterclockwise, the connecting ratchet gear 27 will drive the transmission ratchet gear 26 meshing with itself to rotate clockwise, and the transmission ratchet gear 26 will drive the transmission gear 25 connected to itself through a belt to rotate clockwise, and the transmission gear 25 will drive the transmission gear rod 223 meshing with itself and the friction wheel 222 fixedly connected to the transmission gear rod 223 to rotate counterclockwise.

[0065] like Fig.11 and Fig.12 As shown in FIG. 1 , since the friction wheel 222 extends into the interior of the pipe sleeve 22, the friction wheel 222 will contact the output pipeline 29 which is also located in the interior of the pipe sleeve 22. Fig.12It can be seen that the sleeve 22 and the output pipeline 29 have a contact friction force, and the direction of this friction force is away from the filter 2. The friction wheel 222 will drive the output pipeline 29 to move away from the filter 2 through the friction force generated by the contact with the output pipeline 29, thereby causing the output pipeline 29 to move away from the input pipeline 21, thereby avoiding the problem that the high frequency interference generated by the DC / DC circuit board due to the output pipeline 29 being too close to the input pipeline 21 can be directly coupled through the parasitic capacitance between the input and output lines, bypassing the filter 2, and making the filtering effect of the filter 2 worse.

[0066] At the same time, the user of the line can manually adjust the relative position of the pipe sleeve 22, and the transmission gear rod 223 is rotatably connected to the fixed plate extending upward from the bottom of the inner side of the main shell 1, so the outer connecting rod 221 and the friction wheel 222 connected to the transmission gear rod 223 cannot move, so that in the process of adjusting the movement of the pipe sleeve 22, the friction wheel 222 remains in place, so that the user can adjust the position of the pipe sleeve 22, thereby changing the distance between the output pipeline 29 and the friction wheel 222 in the pipe sleeve 22, and then adjusting the friction between the output pipeline 29 and the outer connecting rod 221, thereby adjusting the adjustment effect of the friction wheel 222 on the output pipeline 29, and then indirectly adjusting the distance between the output pipeline 29 and the input pipeline 21 inside the pipe sleeve 22. Specifically: by Figures 6 to 8 , Fig.13 It can be known that the user can press down the end of the friction rod 24 connected to the return spring 241, so that the end of the friction rod 24 close to the twist wheel 231 no longer contacts the outer side of the twist wheel 231, so that the user can manually turn the twist wheel 231, and when the twist wheel 231 is turned, the gear shaft 23 fixedly connected to it is meshed and connected with the pipe sleeve 22, and when the gear shaft 23 is rotated, it can drive the pipe sleeve 22 meshed with itself to move, thereby adjusting the position of the pipe sleeve 22, and when the position of the pipe sleeve 22 is adjusted, the user can no longer press the return spring 241, so that the friction rod 24 is in contact with the outer side of the twist wheel 231 again due to the elastic force generated when the return spring 241 is compressed, thereby generating an elastic force to prevent the twist wheel 231 from rotating by itself, and because the gear shaft 23 is meshed and connected with the pipe sleeve 22, when the gear shaft 23 stops rotating, the pipe sleeve 22 cannot move either, thereby limiting the movement of the pipe sleeve 22 by itself. Embodiment 2

[0067] refer to Figures 1 to 5 , Fig.14 and Fig.15A fixed connecting rod 31 is fixedly connected to the top of the DC / DC box 3, the fixed connecting rod 31 extends upward to the outside of the main shell 1, and is rotatably connected to a handle 32, and contact blocks 33 are fixedly connected to the upper and lower sides of the four corners of the bottom of the DC / DC box 3. A DC / DC circuit board is fixedly connected inside the DC / DC box 3, and the filter 2 is connected to the input end of the DC / DC circuit board through the output pipeline 29.

[0068] An upper compression rod 311 is fixedly connected to the outer side of one end of the fixed connecting rod 31 between the main shell 1 and the DC / DC box 3, a lower compression rod 35 is fixedly connected to the bottom of the DC / DC box 3, an upper sealing sleeve 13 is fixedly connected to the top of the inner cavity of the main shell 1, and a lower sealing sleeve 14 is fixedly connected to the bottom of the inner cavity of the main shell 1. The upper compression rod 311 is located inside the upper sealing sleeve 13 and is slidably connected to the upper sealing sleeve 13, the lower compression rod 35 is located inside the lower sealing sleeve 14 and is slidably connected to the lower sealing sleeve 14, and the interiors of the upper sealing sleeve 13 and the lower sealing sleeve 14 are in a sealed state.

[0069] A fixed rectangular plate 34 is fixedly connected to the bottom inner side of the main shell 1 at the four corners of the DC / DC box 3, a rotation limit block 341 is rotatably connected to the top of the fixed rectangular plate 34, a return spring 342 is fixedly connected to the bottom of the rotation limit block 341 away from the DC / DC box 3, and one end of the return spring 342 away from the rotation limit block 341 is fixedly connected to the fixed rectangular plate 34, so that the rotation limit block 341 can prevent the DC / DC box 3 from being displaced as the electronic components inside the DC / DC box 3 vibrate, thereby protecting the DC / DC box 3 and the DC / DC circuit inside the DC / DC box 3.

[0070] When the air inside the lower sealing sleeve 14 is compressed to the limit, the bottom of the DC / DC box 3 just enters the bottom of the rotation limit block 341 and is clamped by the rotation limit block 341 .

[0071] The following is the entire working process and working principle of the above embodiment:

[0072] like Figure 4 and Figure 5As shown, when the entire main shell 1 needs to be moved, the moving personnel can hold the two handles 32 on both sides of the main shell 1 by hand and lift it up. Since the fixed connecting rod 31 rotatably connected to the handle 32 is also fixedly connected to the DC / DC box 3, when the handle 32 is lifted upward, the DC / DC box 3 will also move upward under the drive of the fixed connecting rod 31. Since the upper compression rod 311 fixedly connected to the fixed connecting rod 31 is in the upper sealing sleeve 13 at this time, and the interior of the upper sealing sleeve 13 is in a sealed state, the upper compression rod 311 will compress the air inside the upper sealing sleeve 13 while moving upward along the fixed connecting rod 31. When the air inside the upper sealing sleeve 13 is compressed to a certain extent, the air inside the upper sealing sleeve 13 will apply its own force to the main shell 1, so that the moving personnel can lift the entire main shell 1.

[0073] During the whole process of the main housing 1 being lifted:

[0074] like Fig.14As shown, the contact block 33 located at the top moves upward with the DC / DC box 3, thereby driving the rotation limit block 341 to rotate counterclockwise, so that the DC / DC box 3 moves out from the bottom of the rotation limit block 341 and is no longer squeezed and fixed by the rotation limit block 341. In the process of the upper compression rod 311 moving upward to compress the air inside the upper sealing sleeve 13 and compressing it to the limit, the DC / DC box 3 gradually moves to the middle of the inner side of the main shell 1 without contacting other objects inside the main shell 1, thereby avoiding damage to the DC / DC box 3 due to contact and collision with other objects during movement, thereby protecting the safety of the DC / DC conversion circuit and the electronic components contained in the DC / DC circuit. When the DC / DC box 3 needs to be placed, the moving personnel can directly place the main housing 1 at the placement location. At this time, the air inside the upper sealing sleeve 13 is no longer subjected to an upward extrusion force, so the DC / DC box 3 is reversely pressed downward to fall downward, and the DC / DC box 3 also falls downward under the action of its own gravity, so that the lower compression rod 35 located inside the lower sealing sleeve 14 presses the air inside the lower sealing sleeve 14 downward, so that the DC / DC box 3 continuously compresses the air inside the lower sealing sleeve 14 under the action of its own gravity and the air inside the upper sealing sleeve 13, and the air inside the lower sealing sleeve 14 It also applies an upward force to the DC / DC box 3, thereby slowing down the speed at which the DC / DC box 3 falls downward, and preventing the DC / DC box 3 from falling too fast and causing falling damage to the DC / DC conversion circuit inside the DC / DC box 3. At the same time, when the DC / DC box 3 falls to the lowest point between the fixed rectangular plates 34 at its four corners, the contact block 33 at the bottom just drives the rotation limit block 341 to rotate and enter the bottom of the rotation limit block 341. Under the elastic force generated by the reset spring 342, the rotation limit block 341 re-fixes the DC / DC box 3 as a whole.

[0075] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A DC / DC power conversion circuit, characterized in that: include: A main body shell (1), wherein an interface (11) is fixedly connected to one side of the main body shell (1), and a cavity is provided inside the main body shell (1), and a radiation protection plate (12) is fixedly connected inside the cavity; A limiting mechanism, the limiting mechanism being arranged inside the main housing (1), the limiting mechanism comprising a filter (2) fixedly connected to an inner wall of the main housing (1) on a side close to the interface (11), the limiting mechanism being used to limit the position of a pipeline inside the main housing (1); A protection mechanism, the protection mechanism being arranged inside the main housing (1), the protection mechanism comprising a DC / DC box (3) slidably connected inside the main housing (1), the protection mechanism being used to provide buffering for internal components; An output pipeline (29) is fixedly connected to a side of the filter (2) close to the DC / DC box (3), an end of the output pipeline (29) away from the filter (2) is fixedly connected to the DC / DC box (3), a pipe sleeve (22) is slidably connected to the outside of the output pipeline (29), an input pipeline (21) is fixedly connected to the top of the filter (2), and the input pipeline (21) extends to the outside of the main housing (1) and is located inside the interface (11); The side of the pipe sleeve (22) close to the interface (11) is slidably connected to an outer connecting rod (221); the inner side of one end of the outer connecting rod (221) close to the output pipeline (29) is rotatably connected to a friction wheel (222); the side of the friction wheel (222) away from the pipe sleeve (22) is fixedly connected to a transmission gear rod (223); the transmission gear rod (223) extends to the outside of the outer connecting rod (221) and is meshedly connected to a transmission gear (25) at the bottom; the transmission gear (25) is connected to a transmission ratchet gear (26) via a belt drive; the side of the transmission ratchet gear (26) away from the transmission gear (25) is meshedly connected to a connecting ratchet gear (27); the transmission gear rod (223), the transmission gear (25), and the transmission gear (25) are connected to the outer side of the outer connecting rod (221); and the transmission ratchet gear (26) is meshedly connected to a connecting ratchet gear (27). The movable ratchet gear (26) and the connecting ratchet gear (27) are respectively rotatably connected to a fixed plate extending upward from the bottom inner side of the main housing (1); a side of the connecting ratchet gear (27) away from the transmission ratchet gear (26) is rotatably connected to a transmission rotating block (282); a side of the transmission rotating block (282) is fixedly connected to a torsion spring (281); a side of the torsion spring (281) away from the transmission rotating block (282) is fixedly connected to an upper and lower reciprocating block (28); a bottom of the upper and lower reciprocating block (28) is fixedly connected to a transmission spring (283); one end of the transmission spring (283) away from the upper and lower reciprocating block (28) is fixedly connected to the bottom inner side of the main housing (1); and the outer side of the upper and lower reciprocating block (28) is slidably connected to a limited outer plate (284); A gear shaft (23) is meshingly connected to the bottom of the pipe sleeve (22); one side of the gear shaft (23) is rotatably connected to the inner wall of the main housing (1); the other side of the gear shaft (23) extends to the outside of the main housing (1); the other side of the gear shaft (23) extending to the outside of the main housing (1) is fixedly connected to a twist wheel (231); a return spring (241) is fixedly connected to the same side of the main housing (1) as the twist wheel (231); one end of the return spring (241) away from the main housing (1) is fixedly connected to a friction rod (24); the friction rod (24) is rotatably connected to the main housing (1), and one end of the friction rod (24) close to the twist wheel (231) is abutted against the outside of the twist wheel (231).

2. A DC / DC power conversion circuit according to claim 1, characterized in that: The friction wheel (222) extends into the interior of the pipe sleeve (22), and the output pipeline (29) is in a bent state with a margin.

3. A DC / DC power conversion circuit according to claim 1, characterized in that: The top of the DC / DC box (3) is fixedly connected to a fixed connecting rod (31), the fixed connecting rod (31) extends upward to the outside of the main housing (1) and is rotatably connected to a handle (32), the bottom of the DC / DC box (3) is fixedly connected to contact blocks (33) on both upper and lower sides at four corners, the DC / DC box (3) is fixedly connected to a DC / DC circuit board inside, and the filter (2) is connected to the input end of the DC / DC circuit board via an output pipeline (29).

4. A DC / DC power conversion circuit according to claim 3, characterized in that: An upper compression rod (311) is fixedly connected to the outer side of one end of the fixed connecting rod (31) located between the main housing (1) and the DC / DC box (3); a lower compression rod (35) is fixedly connected to the bottom of the DC / DC box (3); an upper sealing sleeve (13) is fixedly connected to the top of the inner cavity of the main housing (1); a lower sealing sleeve (14) is fixedly connected to the bottom of the inner cavity of the main housing (1); the upper compression rod (311) is located inside the upper sealing sleeve (13) and is slidably connected to the upper sealing sleeve (13); the lower compression rod (35) is located inside the lower sealing sleeve (14) and is slidably connected to the lower sealing sleeve (14); and the interiors of the upper sealing sleeve (13) and the lower sealing sleeve (14) are in a sealed state.

5. A DC / DC power conversion circuit according to claim 4, characterized in that: A fixed rectangular plate (34) is fixedly connected to the bottom of the inner side of the main housing (1) at the four corners of the DC / DC box (3); a rotation limit block (341) is rotationally connected to the top of the fixed rectangular plate (34); a return spring (342) is fixedly connected to the bottom of a side of the rotation limit block (341) away from the DC / DC box (3); and one end of the return spring (342) away from the rotation limit block (341) is fixedly connected to the fixed rectangular plate (34).

6. A DC / DC power conversion circuit according to claim 5, characterized in that: When the air inside the lower sealing sleeve (14) is compressed to the limit, the bottom of the DC / DC box (3) just enters the bottom of the rotation limit block (341) and is clamped by the rotation limit block (341).

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