KR102604177B1 - Balancer used in electric vehicle charger - Google Patents

Abstract

The present invention relates to a balancer used in an electric vehicle charger, and more specifically, to a balancer used in an electric vehicle charger that allows the user to more easily place the supply module that supplies power to the vehicle from the electric vehicle charger adjacent to the vehicle. It's about.
This invention includes: a first roller installed on a frame; A string member wound around the first roller and one end of which is connected to a supply module that supplies electricity to the vehicle; and a weight connected to the other side of the string member.

Description

Balancer used in electric vehicle charger {BALANCER USED IN ELECTRIC VEHICLE CHARGER}

The present invention relates to a balancer used in an electric vehicle charger, and more specifically, to a balancer used in an electric vehicle charger that allows the user to more easily place the supply module of the electric vehicle charger that supplies power to the vehicle adjacent to the vehicle. It's about.

An electric vehicle is equipped with a battery, and the battery of the electric vehicle is charged through an electric vehicle charger.

Generally, an electric vehicle charger includes a slow charging module and a fast charging module (hereinafter referred to as charging module), and a supply module (connection module) that is electrically connected to the charging module and supplies power to the vehicle's battery.

The above-mentioned supply module is of a wired type and a wireless type. In general, the wired type supply module is provided with a cable electrically connected to the above-described charging module, is provided at the end of the cable, and is mechanically detachably connected to the inlet of the vehicle, A connector connected to a terminal provided in the inlet is provided.

Additionally, the wireless supply module may be provided in a vehicle and include a transmission pad equipped with a coil to supply induced current to a receiving pad equipped with a coil (see Patent No. 10-2471730 below).

However, since the connector or transmission pad of the supply module is heavy, it is difficult for the user to lift it and transport it to the vehicle.

The present invention was devised to solve the above problems, and its purpose is to provide a balancer used in an electric vehicle charger that allows the supply module of the electric vehicle charger to be more easily lifted and transported to the vehicle.

The present invention, aimed at solving the above problems, has the following configuration and characteristics.

A first roller installed on the frame; A string member wound around the first roller and one end of which is connected to a supply module that supplies electricity to the vehicle; and a weight connected to the other side of the string member.

Additionally, a fixing member for fixing the other end of the string member to the frame; and a second roller connected to the weight and disposed lower than the fixing member and the first roller, disposed rearward than the first roller, and around which the string member is wound.

It may further include a vertical axis having a length in the vertical direction, connected to the frame so as to be rotatable about a central axis parallel to the vertical direction, and to which the first roller is connected.

In addition, the vertical axis is a tubular body in which a through hole is formed along the vertical direction, and a discharge hole communicating with the through hole may be formed on the upper side of the vertical axis.

The present invention having the above configuration and features has the effect of enabling the supply module of an electric vehicle charger to be lifted more easily and transported to the vehicle more easily.

Figure 1 is a diagram illustrating a state in which a balancer used in an electric vehicle charger according to an embodiment of the present invention is provided on the electric vehicle charger side.
Figure 2 is a side cross-sectional view of a balancer used in an electric vehicle charger according to an embodiment of the present invention.
Figure 3 is a diagram for explaining the state in which the weight is moved upward in Figure 2.
Figure 4 is a diagram for explaining a further embodiment of the present invention.
Figure 5 is a diagram for explaining the connecting member and cover.

Since the present invention can be subject to various changes and can have various forms, implementation examples (or embodiments) will be described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

The terms used in this specification are merely used to describe specific implementation examples (sun, aspect, aspect) (or examples), and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as ~include~ or ~consist of~ are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

~First~, ~Second~, etc. described in this specification are only used to distinguish different components, and are not limited by the order of manufacture, and the names are used in the detailed description and claims of the invention. may not match.

Throughout this specification, when a part is said to be “connected” to another part, this includes not only the case where it is “directly connected,” but also the case where it is “indirectly connected” with another element in between. do.

Figure 1 is a diagram illustrating a state in which a balancer used in an electric vehicle charger according to an embodiment of the present invention is provided on the electric vehicle charger side. Figure 2 is a side cross-sectional view of a balancer used in an electric vehicle charger according to an embodiment of the present invention. Figure 3 is a diagram for explaining the state in which the weight is moved upward in Figure 2.

The balancer (B) used in the electric vehicle charger according to an embodiment of the present invention (weight control device used in the electric vehicle charger, lift device used in the electric vehicle charger) is connected to the supply module (connector or transmission pad) of the electric vehicle charger (C). (including, etc.) is intended to be easily transported to the vehicle, and hereinafter, for convenience of explanation, it will be referred to as 'this device'.

Referring to Figures 1 and 2, this device (balancer (B) used in an electric vehicle charger according to an embodiment of the present invention) includes a first roller (2), a string member (3), and a weight (4) ) includes.

Referring to FIG. 1, this device may include a frame (1) (or case) installed on the bottom of the electric vehicle charger (C).

Referring to FIG. 2, the first roller 2, the strap member 3, and the weight 4 are connected to the frame 1 using various known coupling methods (bolts, brackets, welding, etc.). It can be connected and installed.

The first roller 2 is installed by being connected to the frame 1, and for example, a connection plate 9 may be connected to the front upper side of the frame 1, and the connection plate 9 includes the first roller 2. The first shaft member of the first roller (2) may be connected.

The front, described above, may refer to the left direction with respect to FIG. 2, and the rear, described later, may refer to the right direction with respect to FIG. 2. The same will be applied in the description below.

In addition, the above-mentioned upper side (top, top, upper surface, etc.) refers to the upper side (top, top, upper surface, etc.) with respect to FIG. 2, and the lower side (lower, bottom, lower surface, etc.) refers to the lower side (lower, lower, etc.) with respect to FIG. 2. (bottom, bottom, etc.), and the same will be applied in the description below.

The first shaft member of the above-described first roller 2 may have a length in the horizontal direction (left and right directions based on FIGS. 1 and 2), and is illustratively perpendicular to the front-back direction when viewed from a plan view. It may have a length parallel to the direction (front-back direction based on FIG. 2).

The above-described first roller (2) is axially coupled to the first shaft member and rotates around the first shaft member as the central axis, and may exemplarily perform the same role as a fixed pulley, and may be used as a string member to be described later. (3) is wound and can play the role of changing the moving direction (direction of force) of the string member (3).

The string member 3 is wound around the first roller 2 and one end (front end) is connected to the above-mentioned supply module that supplies electricity to the vehicle. By way of example, the above-described string member 3 may be a wire.

For example, one end (front end) of the string member 3 may be provided with a device such as a ring for connection to the supply module.

Referring to Figures 2 and 3, the weight 4 is connected to the other side (rear end side) of the string member 3 with respect to the first roller 2.

That is, the string member 3 wound around the first roller 2 has the above-mentioned ring-like member connected to one side (front end side) with respect to the first roller 2, and the above-mentioned member to the other side. Weight 4 may be connected.

The weight 4 has its own weight and may include metal, etc., and for example, its own weight may be about 1 to 50 kg, but it is not limited to this. It is desirable to set the weight to correspond to the weight of the above-mentioned supply module (connector or transmission pad, etc.) or to have a weight smaller than the weight of the supply module.

The weight 4 may be connected to the string member 3 via a plate 8, which will be described later, and this will be described in more detail in the description below.

Referring to FIG. 3, a state in which the weight 4 is lifted upward by being pulled to the lower side of the string member 3 is shown.

At this time, when the one end side (front side) of the string member 3 is connected to the supply module and the supply module is held, the weight 4 moves downward by its own weight (Figure 2 (Reference) and lift the front side of the above-described string member (3) upward to raise the supply module upward.

Therefore, the user holding the supply module can lift the supply module and transport it to the vehicle with less effort. Additionally, less force can be used to lift the supply module even in the charging state.

As mentioned above, it is said that the weight (4) can have a smaller weight than the supply module and the supply module, and the user applies the force of the string member (3) through the first roller (2), which acts as the fixed pulley, in the direction of applying the force to the string member (3). By simply switching and lifting the weight (4) having a weight smaller than the supply module, the supply module having a weight greater than the weight (4) can be lifted and transported.

Referring to Figures 2 and 3, the device may include a fixing member 5 that connects and secures the other end (the end opposite to the one end (front end)) of the string member 3 to the frame 1. .

The fixing member 5 may exemplarily include a member such as a bracket provided with a ring member to which the other end of the string member 3 is knotted, and the bracket of the fixing member 5 may include a bolt. It can be connected to the frame 1 described above through a fastening member such as.

The configuration of the above-described fixing member 5 is described as an example and is not limited to the above description, and the above-mentioned fixing member 5 includes various configurations as long as the strap member 3 and the frame 1 can be connected. Of course you can do it.

The other end of the strap member 3 and the fixing member 5 may be disposed lower and rear than the first roller 2.

At this time, the device may include the fixing member 5 and a second roller 6 disposed lower than the first roller 2 while connected to the weight 4.

The above-mentioned second roller (6) is also wound with the above-mentioned string member (3), and when the device is viewed in a side cross section as shown in Figures 2 and 3, the second roller (6) is the above-mentioned first roller ( 2) and may be disposed forward of the other end of the strap member 3 connected to the frame 1 by the fixing member 5 described above. That is, the second roller (6) may be disposed between the other end of the string member (3) and the first roller (2).

To be more specific, the device may include a plate 8 connected to the upper part of the weight 4.

A second shaft member, which is the rotation axis of the second roller 6, may be connected to and installed on the plate 8, and the second shaft member may have a length parallel to the first shaft member.

The second roller 6 is axially coupled to the above-described second shaft member and can be rotated with the second shaft member as the central axis.

In addition, the device is connected to the frame 1, is disposed rearward than the weight 4, and includes a guide member 71 having a length parallel to the vertical direction. It may include a guide means 7. .

The guide means 7 may include a block 72 that is fastened to the guide member 71 and moves and moves along the longitudinal direction of the guide member 71.

The guide member 71 may be an LM guide (LM guide rail), and the block 72 may be an LM block that is moved by being fastened to the LM guide.

At this time, the plate 8 may be connected to the block 72 by various known methods (bolts, brackets, etc.).

The strap member (3) has the other end fixed to the rear upper part of the frame (1) by the fixing member (5), and the part wound around the first roller (2) and the fixing member (5). The second roller 6 can be wound so that the part between the part (the other end) connected to ) supports the lower end of the second roller 6 (see FIGS. 2 and 3).

That is, the string member 3 can be wound simultaneously while zigzagging the first roller 2 and the second roller 6 disposed below and behind the first roller 2.

With the weight 4 disposed on the lower side as shown in Figure 2, the user moves the weight 4 upward as shown in Figure 3 to connect one end of the string member 3 to the supply module and attaches the string member ( 3) must be pulled downward.

At this time, as described above, when this device includes only the first roller (2), the weight (4), and the string member (3) that serve as a fixed pulley, the user must lift the weight (4), so that the weight There was an advantage in lifting the supply module only when the weight of (4) was smaller than that of the supply module.

Therefore, there is a problem in that it is difficult to increase the weight of the weight 4 to exceed the supply module, making it difficult to lift the supply module more lightly.

At this time, as described above, this device can supplement the above-mentioned problems by additionally including a fixing member (5), a second roller (6), a guide means (7), and a plate (8).

More specifically, as shown in FIG. 2, when one end of the string member (3) is pulled downward to connect it to the supply module with the weight (4) disposed on the lower side, the second roller (6) is disposed below the first roller 2 and the fixing member 5 (the other end of the string member 3) and can function as a movable pulley.

That is, when the user pulls one end of the string member (3) downward, the other end of the string member (3) is connected to the frame (1), so that the frame (1) has a force that pulls the other end of the string member (3). Because this is applied, the user can pull the second roller 6 upward even with half the force.

In this case, since the plate 8 to which the second roller 6 is connected is connected to the block 72, the block 72 moves upward along the guide member 71, thereby adding to the straightness of the second roller 6. The weight 4 connected to the second roller 6 moves upward as shown in FIG. 3 so that the user can lift the weight 4 upward with half the force.

In this way, since this device can lift the weight 4 with less force, including the fixing member 5, the second roller 6, the guide means 7, and the plate 8, etc. There is an advantage in that the weight of the weight 4 can be increased, and thus the supply module can be transported to the vehicle with less force.

Figure 5 is a diagram for explaining the connecting member and cover.

Referring to Figures 2 and 5, the device has a vertical length, is connected to the frame 1 so as to be rotatable about a central axis parallel to the vertical direction, and the first roller 2 is connected. It may include a vertical axis 10.

More specifically, this device includes a first block bearing 11 (first bearing block) connected to the upper part of the frame 1 and the upper end of the vertical axis 10, and the frame 1. It may include a second block bearing 12 (second bearing block) connected to the upper part, disposed lower than the first block bearing 11, and connected to the lower end of the vertical axis 10.

The block bearing (bearing block) (pillow block bearing) described above is used in various fields and is generally a bearing mounted on a polymer block.

Each bearing of the first block bearing 11 and the second block bearing 12 has a through hole formed along the vertical direction, and the upper and lower parts of the vertical axis 10 are respectively inserted and fitted into the through hole. Each of the first block bearing 11 and the second block bearing 12 may be connected to the vertical axis 10.

This device may include a connecting member 13 connected to the vertical axis 10. When viewed from the front, the connecting member 13 is provided as a pair with the first roller 2 sandwiched between them. It can be.

A pair of connecting members 13 may be connected to the first shaft member that serves as the central axis of the first roller 2. That is, the pair of connecting members 13 can be connected to each other via the first shaft member, and the first roller 2 described above can be disposed between the pair of connecting members 13.

At this time, the rear end of the pair of connecting members 13 described above may be connected to the vertical axis 10 through a bolt or the like.

Therefore, the above-mentioned first roller (2) is rotated with the first shaft member as the central axis, and at the same time, the connecting member (13) to which the first roller (2) is connected has the above-mentioned vertical axis (10) parallel to the vertical direction. As it is rotated around one central axis, it can be rotated around the vertical axis 10.

Therefore, the position of the above-described first shaft member can be changed, so that the first roller 2 can be rotated around the central axis in a more diverse direction among the horizontal directions. Therefore, there is an advantage that supply modules in various positions can be lifted more easily.

Meanwhile, referring to FIGS. 2 and 5, when viewed from the side (see FIG. 2), the upper size of each of the pair of connecting members 13 may be larger than the upper outer diameter of the first roller 2. there is.

Additionally, the device may include a cover 14 connecting the upper part of the pair of connecting members 13 described above. The cover 14 may be made of a transparent material.

In this way, the upper size of each of the pair of connecting members is larger than the upper outer diameter of the first roller 2, and the present device includes the cover 14, so that the string member 4 is connected to the first roller 2, By being disposed in the space formed by the pair of connecting members 13 and the cover 14, the string member 4 can be prevented from being separated from the first roller 2.

In addition, the external force applied to the string member 4 can rotate the connecting member 13 with the vertical axis 10 as its central axis, and therefore the first roller 2 also rotates with the vertical axis 10 as its central axis. You can do it.

Meanwhile, the vertical axis 10 may be a tubular body in which a through hole is formed along the vertical direction on the inside.

At this time, a discharge hole may be formed on the upper side of the vertical shaft 10 to communicate with the through hole and the outside of the vertical shaft 10.

One side of the string member (3) wound around the second roller (6) is inserted into the through hole through the lower end opening of the vertical axis (10) communicating with the through hole, and the string member (3) inserted into the through hole is ) (a portion disposed on one side of the through hole) may be discharged to the outside of the vertical shaft 10 through the discharge hole and wound around the first roller 2.

In this way, the vertical shaft 10 has a through hole formed on the inside and includes the discharge hole, thereby preventing the string member 3 from being twisted.

Meanwhile, this device may include a waterproofing material (GS) and a functional additive (G) applied to the outer surface of the frame 1.

The waterproofing material (GS) is applied to the outer surface of the frame 1 and may contain 5 parts by weight of urethane (compared to 0.1 part by weight of hexadecane, which will be described later). The waterproofing material (GS) includes urethane and adds waterproofing to the frame 1.

The functional additive (G) includes an inner shell material (G1) containing 0.2 parts by weight of aluminum (or made of aluminum), a heat buffering material (G2) containing 0.1 parts by weight of hexadecane, and 0.3 parts by weight of polyester. A sound absorbing material (G3) (or consisting of polyester), an anionic polymer material (G4) containing 0.2 parts by weight of p-styrenesulfonic acid (SSNa), and a spring steel (or spring) containing 0.2 parts by weight. It includes an elastic body (G5) made of steel.

The ratio of each component of the functional additive (G) was based on 0.1 weight part of hexadecane.

The inner shell material (G1) has a spherical shape surrounding the heat buffering material (G2), and the sound-absorbing material (G3) surrounds the inner shell material (G1), but its outer surface has a convex-convex shape in which hemispherical ridges and valleys are repeated, and the anionic A polymer material (G4) is provided in the valley of the sound-absorbing material (G3), and the sound-absorbing material (G3) includes an insertion groove recessed inward from the crest so that the inner end of the elastic body (G5) is inserted, and the elastic body (G5) G5) has a coil shape and an inner end is inserted into the insertion groove and may be provided on the outside of the sound absorbing material (G3).

Here, the inside refers to the center side of the unit (GU) described later of the functional additive (G), and the outside refers to the radial direction from the center side.

Referring to FIG. 4, to describe the functional additive (G) in more detail, the inner shell material (G1) has a spherical shape and is made of aluminum, and has an accommodating space inside where an anionic polymer material (G4) to be described later is accommodated. is formed It can also be dispersed and mixed with the above-described waterproofing material (GS).

The above-described inner shell material (G1) preferably contains 0.2 parts by weight of aluminum. If the aluminum content exceeds 0.2 parts by weight, the weight of the functional additive (G) is excessively increased and dispersibility is reduced, and if it is less than 0.2 parts by weight, There is a risk that the heat buffer material (G2), which will be described later, is not sufficiently wrapped, causing the heat buffer material (G2) to be lost.

The sound absorbing material (G3) is provided outside the inner covering material (G1) and surrounds the inner covering material (G1), and is mixed with the waterproofing material (GS) and distributed in the waterproofing material (GS).

The sound absorbing material (G3) contains polyester and absorbs sound waves. As described above, the sound-absorbing material (G3) has an outer surface (surface) of a concavo-convex shape with repeated hemispherical ridges and valleys, and the sound-absorbing performance is further improved because the contact area with sound waves is large.

The sound absorbing material (G3) contains 0.3 parts by weight of polyester. If the amount of polyester is less than 0.3 parts by weight, the sound absorption performance decreases, and if the polyester exceeds 0.3 parts by weight, the weight of the functional additive (G) is excessively increased and the content of the functional additive (G) is reduced. It can reduce acidity.

As described above, since the inner shell material (G1) is provided inside the sound-absorbing material (G3), sound waves passing through the sound-absorbing material (G3) are reflected by the inner shell material (G1) and are absorbed by the sound-absorbing material (G3). It can be absorbed inside.

The thermal buffer material (G2) is filled in the receiving space formed inside the inner shell material (G1), and may include hexadecane as described above.

Hexedecane (C16H34) is a phase change material (PCM) with a melting point of approximately 18.2°C.

A phase change material is an energy storage material that can actively store and release heat without external factors in the form of latent heat without a change in temperature when the phase changes depending on the surrounding temperature.

In general, latent heat, which is heat that enters and exits without a temperature change when a phase change occurs, has a significantly higher amount of heat than sensible heat, which is heat that enters and exits with a temperature change without accompanying a phase change. This feature can be used to store high amounts of thermal energy or maintain temperature.

In order to change the melting point, the heat buffer (G2) includes undecane, dodecane, tridecane, tetradecane, pentadecane, and hexadecane in order to change the melting point. It may further include one or more of Hexadecane, Heptadecane, Octadecane, Nonadecane, Eicosane, and Triacontane. The melting point of the heat buffer (G2) can be adjusted within the range of 15 to 25°C, which is room temperature.

The thermal buffer material (G2) described above may play a role in maintaining the temperature of the inner shell material (G1). Therefore, it is possible to prevent cracks from occurring as the thermal buffer material (G2) expands at high temperatures or contracts at low temperatures.

Therefore, the sound absorption performance of the functional additive (G) can be maintained despite temperature changes by suppressing the loss of the heat buffer (G2) due to cracking of the inner shell material (G1) and suppressing the decrease in sound wave reflection ability.

In addition, the lining material (G1) and the above-described sound-absorbing material (G3) perform annual exchange with the above-described heat buffering material (G2), and as a result, the heat buffering material (G2) and the waterproofing material (GS) achieve heat exchange, so that the temperature of the waterproofing material (GS) It can play a role in suppressing cracks, damage, and deformation due to contraction and expansion due to changes.

The heat buffer (G2) may contain 0.1 part by weight of hexadecane as described above. When less than 0.1 part by weight of hexadecane is used, the inner shell material (G1) is heated to a specific temperature (eg, 15 to 25° C. or about There is a problem in that deviation from the temperature (18.2°C) cannot be effectively suppressed, and if hexadecane exceeds 0.1 part by weight, it cannot be accommodated in the accommodation space of the inner shell material (G1) described above.

The anionic polymer material (G4) may include p-styrenesulfonic acid as described above, and may further include a hydrogel pre-polymer.

The anionic polymer material (G4) may be a mixture of p-styrenesulfonic acid and hydrogel pre-polymer (1:19 ratio) and UV cured.

The anionic polymer material (G4) described above is provided outside the sound absorbing material (G3).

It is preferable that 0.2 parts by weight of the anionic polymer material (G4) be included. However, if less than 0.2 parts by weight is used, the negative charge is not sufficient, and if it exceeds 0.2 parts by weight, the weight of the functional additive (G) is excessively increased, reducing dispersibility. There is a problem with it deteriorating.

The waterproofing material (GS) may contain a large number of units (GU) of the functional additive (G). During the application process, the multiple units (GU) are mutually repelled by electrostatic repulsion, resulting in the composition (waterproofing material (GS) and functional additive The dispersibility of multiple units (GU) in the mixture (G) can be improved.

As described above, the anionic polymer material (G4) may be provided in the grooves of the sound absorbing material (G3), thereby suppressing collisions between neighboring units (GU) or with other materials of the present composition to form an anionic polymer. Damage to the material (G4) can be prevented.

The elastic body (G5) is provided on the outside (outside, surface) of the sound-absorbing material (G3) and includes spring steel.

As described above, the sound absorbing material (G3) includes an insertion groove recessed from the outer surface of the floor to the inside, and the inner end of the elastic body (G3) is inserted into the insertion groove to stabilize the structure.

As described above, the elastic body (G3) has a coil shape and is provided at the outer end of the ridge of the sound absorbing material (G3) to add elasticity to the unit (GU).

Therefore, in the process of stirring the waterproofing material (GS) and the functional additive (G) containing a large number of units (GU), damage to the unit (GU) due to collision between neighboring units (GU) is suppressed, and the coil-shaped elastic material As (G5) is compressed and elastically restored, neighboring units (GU) move away from each other, thereby improving the dispersibility of the functional additive (G) in the waterproofing material (GS).

The present invention described above with reference to the accompanying drawings can be modified and modified by those skilled in the art, and such modifications and changes should be construed as falling within the scope of the present invention.

Balancer used in electric vehicle charger: B
Frame: 1 First roller: 2
String member: 3 Weight: 4
Fixing member: 5 2nd roller: 6
Guide means: 7 Guide members: 71
Blocks: 72 Plates: 8
Electric vehicle charger: C

Claims (4)

A frame installed on the floor;
A first roller connected to the frame;
A string member wound around the first roller and one end of which is connected to a supply module that supplies electricity to the vehicle; and
A weight connected to the other side of the string member;
Including,
A first shaft member of the first roller is connected to the frame,
The first shaft member has a horizontal length,
Further comprising a connecting member connected to the first shaft member of the first roller,
a vertical axis having a length in the vertical direction, connected to the frame so as to be rotatable about a central axis parallel to the vertical direction, and connected to the connecting member;
It further includes,
a fixing member that secures the other end of the string member to the frame; and
a second roller connected to the weight and disposed lower than the fixing member and the first roller, disposed rearward than the first roller, and around which the string member is wound;
It further includes,
The vertical axis is,
It is a tubular body in which through holes are formed along the vertical direction,
A discharge hole communicating with the through hole is formed on the upper side of the permanent vertical axis,
One side of the string member is inserted into the through hole through a bottom opening of the vertical shaft that communicates with the through hole, and one end of the string member inserted into the through hole is discharged to the outside of the vertical shaft through the discharge hole. Winded around the first roller,
A first block bearing connected to the upper part of the frame and to which the upper end of the vertical axis is connected; and
a second block bearing connected to the upper part of the frame, disposed lower than the first block bearing, and connected to the lower end of the vertical axis;
It further includes,
A pair of connecting members is disposed with the first roller interposed between them,
It is made of a transparent material and further includes a cover connecting the upper part of the pair of connecting members,
The other end of the string member and the fixing member are disposed lower than the first roller,
The other end of the strap member and the fixing member are disposed rearward than the first roller,
Includes a plate connected to the upper part of the weight,
The second roller is axially coupled to the second shaft member and rotates with the second shaft member as the central axis,
The second shaft member has a length parallel to the first shaft member and is connected to the plate,
It further includes a guide means connected to the frame and disposed rearward of the weight and including a guide member having a length in the vertical direction,
The guide means further includes a block that is engaged with the guide member and moves and moves along the longitudinal direction of the guide member,
A balancer used in an electric vehicle charger, wherein the plate is connected to the block.
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