Battery set and battery set storage structure using said battery set

Abstract

To provide a battery set that allows a battery of an electric work machine to be transported and can be housed in the electric work machine without being displaced, and a battery set housing structure using the battery set. [Solution] A battery set 100 comprising a battery 12 used in an electric work machine and a carry-type battery case 13 into which the battery 12 can be removably placed, the carry-type battery case 13 having a case section 131 that covers the outer periphery of the battery 12, wheels 132 provided on the case section 131 for moving the battery set 100, a protrusion 133 provided on the side 131b of the case section 131, and an extendable hand-held carrying handle 134 connected to the case section 131, characterized in that the hand-held carrying handle 134 can be reversibly changed between a carrying state in which the hand-held carrying handle 134 is extended for transportation and a storage state in which the hand-held carrying handle 134 is retracted for storage in the electric work machine.

Description

[Technical Field]

[0001] The present invention relates to a battery set used in an electric working machine and a battery set storage structure using the battery set. [Background technology]

[0002] Patent Document 1 describes a battery housing structure used in an electric work machine, which simplifies the configuration, reduces costs, and makes it easier to load and unload a battery pack onto and from the vehicle body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2018-012464 Summary of the Invention [Problem to be solved by the invention]

[0004] Although the electric work vehicle described in Patent Document 1 has wheels, these wheels are used as training wheels for loading batteries onto the electric work vehicle, and are not used as wheels for transporting the batteries, so the batteries cannot be transported.

[0005] Therefore, the present invention has been made in consideration of the above circumstances and provides a battery set that allows the battery of an electric work machine to be transported and can be stored in the electric work machine without shifting position, and a battery set storage structure that uses the battery set. [Means for solving the problem]

[0006] In view of the above problems, the battery set according to the present invention includes a battery for use in an electric work machine, and a carry-type battery case into which the battery can be detachably placed, the carry-type battery case including a case portion that covers the outer periphery of the battery, and a cover that is provided on the case portion, Carry-type battery case a wheel for moving the battery set, a protrusion provided on a side of the case, and a retractable hand-held carrying handle connected to the case, wherein the hand-held carrying handle is reversibly changed between a transport state in which the hand-held carrying handle is extended and transported, and a storage state in which the hand-held carrying handle is retracted and stored in the electric work machine. and a battery set storage section that is provided in the electric work machine and stores the battery set in a stored state, the battery set storage section having an opening for putting in and taking out the battery set, and an approach table on which the battery set is placed, the approach table having wheel guides that guide the wheels, and engagement holes that fit into the protrusions. The feature is that

[0008] The battery set storage section is also characterized by having a first stopper portion extending upward from the approach platform at the rear side of the approach platform where the battery set is stored from the opening along the wheel guide.

[0009] The battery set storage section is also characterized by having a bent portion at the upper part of the first stopper portion and a connector portion that connects to the battery and rotates around the bent portion as a base point.

[0010] The battery set storage section is also characterized by including a biasing means for rotating the connector section upward around the bent section as a base point.

[0011] The battery set storage section is also equipped with a stopper device that prevents the battery set placed on the approach platform from moving forward, and the stopper device is characterized by having a knob that is pushed toward the approach platform, and a second stopper portion that protrudes from the approach platform on the front side of the approach platform in conjunction with the knob being pushed in, thereby preventing the battery set from moving forward.

[0012] The battery set storage section has a cover section that closes the opening, and by closing the opening, the cover section interferes with the knob and pushes the knob in. [Effects of the Invention]

[0013] According to the battery set of the present invention, there is provided a carry-type battery case into which a battery used in an electric work machine can be detachably placed, the carry-type battery case being provided in a case portion that covers the outer periphery of the battery, Carry-type battery case The battery set has wheels for moving the battery and an extendable hand-held transport handle connected to the case, and the hand-held transport handle can be reversibly changed between an extended transport state and a contracted storage state, so that the battery can be transported from the electric work machine.

[0014] The battery set storage structure of the present invention has a battery set storage section that is provided within an electric work machine and that stores a battery set, and the battery set storage section has an approach platform on which the battery set is placed, and the approach platform has wheel guides that guide the wheels and engagement holes that can be fitted into the protrusions, so that the battery set can be stored without shifting position.

[0015] In addition, the battery set storage section is provided with a first stopper portion extending upward from the approach platform at the rear side of the approach platform where the battery set is stored from the opening along the wheel guide, thereby preventing the battery set from moving toward the rear.

[0016] Furthermore, the battery set storage section is provided with a biasing means that causes the connector section to rotate upward around the bent section, so the connector section will not sag downward, making it easier to store the battery set.

[0017] The battery set storage section is also equipped with a stop device that prevents the battery set placed on the approach table from moving forward. The stop device has a knob that is pushed toward the approach table and a second stopper portion that protrudes from the approach table on the front side of the table in conjunction with the knob being pushed in, thereby preventing the battery set from moving forward.

[0018] In addition, the battery set storage section has a cover section that closes the opening, and by closing the opening, the cover section interferes with the knob and pushes the knob in, so that by closing the cover section, the stationary device can be automatically activated. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 2 is a schematic perspective view showing the battery set housed in the battery compartment; [Figure 2] FIG. 2 is a schematic perspective view showing the battery set in a transported state. [Figure 3] FIG. 10 is a schematic perspective view showing a protrusion of the battery set. [Figure 4] FIG. 10 is a schematic diagram showing a state in which a worker carries a battery set. [Figure 5] This is a schematic wiring diagram of the battery set and charger. [Figure 6] FIG. 2 is a schematic perspective view showing a battery set housing section. [Figure 7] FIG. 2 is a schematic perspective view of the battery set housing structure as seen from below. [Figure 8] FIG. 2 is a schematic perspective view of the battery set housing structure as seen from the rear side. [Figure 9] FIG. 1 is a schematic perspective view of a battery set housing structure housing only one battery set. [Figure 10] FIG. [Figure 11] FIG. 10 is a schematic perspective view showing how the stationary device is operated by the cover portion. DETAILED DESCRIPTION OF THE INVENTION

[0020] <<About Battery Set 100>> The battery set 100 according to the present invention allows easy replacement, charging, and transport of the battery 12 used in an electrically powered working machine such as an electric aerial work machine. When it is desired to charge the battery 12, the entire battery set 100 can be removed from the electric working machine 11 and rolled on wheels 132 to a location where a power source C is located, and charging can be performed. Alternatively, even if the battery set 100 is not removed from the electric working machine 11, the electric working machine itself can be moved close to the power source C and the battery 12 can be charged using a charger A provided on the electric working machine 11.

[0021] The battery set 100 includes a rechargeable battery 12 used in an electric work machine and a carry-type battery case 13 into which the battery 12 can be detachably placed. As shown in Figures 1 and 2, the battery set 100 can be in two forms: a storage state in which it is stored in a battery set storage section 200, and a portable state in which the battery set 100 is carried around.

[0022] <About the Carry-Type Battery Case 13> The carry-type battery case 13 mainly comprises a case part 131, wheels 132, protrusions 133, a carrying handle 134, a fixed handle 135, and a battery-side connector part 136, and makes it easy to carry while protecting the battery 12.

[0023] (Regarding the case part 131) The case 131 has a rectangular parallelepiped shape and tightly surrounds the outer periphery of the battery 12 to protect the outer periphery of the battery 12. The case 131 has a bottom surface 131a and side surfaces 131b to 131e. The side surfaces 131b to 131e comprise four side surfaces, a first side surface 131b to a fourth side surface 131e. As shown in FIG. 1 and other figures, the first side surface 131b faces the third side surface 131d, and the second side surface 131c faces the fourth side surface 131e. The first side surface 131b faces upward when the battery set 100 is accommodated in the battery set accommodation section 200.

[0024] The area corresponding to the top surface of the case 131 is an opening 131f, which serves as an opening for inserting and removing the battery 12 used in the electric work machine. Wheels 132 are provided at the bottom of the case 131, a protrusion 133 for preventing displacement is provided on the third side surface 131d of the case 131, and a hand-held carrying handle 134, a fixed handle 135, and a battery-side connector 136 are provided on the first side surface 131b.

[0025] (Regarding wheel 132) The wheels 132 are provided to roll and move the battery set 100. A pair of wheels are provided at symmetrical positions on the second side surface 131c and the fourth side surface 131e of the case portion 131.

[0026] The wheel 132 is provided on the second side surface 131c and the fourth side surface 131e so that the axle 132a, which is the rotation axis, is on the second side surface 131c and the fourth side surface 131e. The axle 132a is provided on the second side surface 131c and the fourth side surface 131e, with the wheel 132 being on the bottom surface 131a and the third side surface 131d side, and is provided at a position where a part of the circumference of the wheel 132 protrudes from the bottom surface 131a and the third side surface 131d in a side view. This allows the wheel 132 to come into contact with the ground, and the wheel 132 It can be rolled and transported.

[0027] Furthermore, the wheels 132 are located on the third side surface 131d, which is opposite the first side surface 131b on which the handle for hand-held transportation 134 is located. Therefore, even when the handle for hand-held transportation 134 is retracted, the wheels 132 do not interfere with the handle for hand-held transportation 134, and when moving by holding the handle for hand-held transportation 134, the battery set 100 can be rolled at an angle and carried as shown in FIG. 4.

[0028] In this embodiment, the wheels 132 are two wheels, one on the left and one on the right, but the number of wheels 132 is not limited, and three wheels or one wheel may be used.

[0029] (Regarding the protrusion 133) 3, the protrusion 133 is provided on the third side surface 131d, and when the battery set 100 is accommodated, fits into an engagement hole 223 provided in the battery set accommodation section 200. The protrusion 133 is provided on the front side of the third side surface 131d when accommodated in the battery set accommodation section 200. By providing the protrusion 133 on the front side, as will be described later, the protrusion 133 can be more easily fitted into the engagement hole 223.

[0030] (About the hand-held moving handle 134) The hand-held carrying handle 134 has a support 134a, a grip 134b, and a storage section 134c, and serves as a handle when transporting the battery set 100. The support 134a is a pair of two, with the grip 134b fixed to the end of the support 134a. The support 134a is of a pull-drive type and can be extended and retracted in the vertical direction. When the battery set 100 is in a transport state, the support 134a is extended as shown in FIG. 2. When the battery set 100 is stored in the battery set storage section 200, the support 134a can be reversibly changed to a stored state in which the support 134a is retracted as shown in FIG. 1.

[0031] When contracted, the handle 135 is accommodated in the accommodation portion 134c provided on the sides of the first side surface 131b and the second side surface 131c and the sides of the first side surface 131b and the fourth side surface 131e so as to fit along the accommodation portion 134c. The accommodation portion 134c is fixed to the first side surface 131b, the second side surface 131c, and the fourth side surface 131e, and the support portion 135b of the fixed handle 135 is also fixed to the first side surface 131b at the same time.

[0032] (Regarding fixed handle 135) The fixed handle 135 is provided on the first side surface 131b and is held by the user when removing the battery set 100. The fixed handle 135 has a gripping rod 135a for holding the hands and support parts 135b fixed to both ends of the gripping rod 135a. The operator holds the gripping part 135a of the fixed handle 135 to place the battery set 100 in or remove it from the battery set storage part 200.

[0033] Unlike the support 134a of the hand-held moving handle 134, the support portion 135b of the fixed handle 135 does not extend or contract, and has a fixed length. Therefore, even when trying to lift the battery set 100 by holding the fixed handle, the fixed handle 135 does not extend, making it easy to remove or store the battery set 100 and eliminating the hassle. Furthermore, when the battery set 100 is stored, the first side surface 131b faces upward, allowing the operator to easily grip the fixed handle 135 and easily remove the battery set 100. The support portion 135b is a substantially triangular plate member and is provided in two locations on the first side surface 131b. A gripping rod 135a is connected to the vertex of the support portion 135b.

[0034] (Regarding the battery side connector part 136) The battery-side connector 136 is a connector for electrically connecting the battery 12 to the outside and is provided so as to protrude from the first side surface 131b. It can be connected primarily to the motor or charger A through an electrical circuit within the electric work machine. When connecting to charger A, cord B is connected to the charger A and the battery connector 36 of the battery set 100. Charger A has two connection ports, so it charges the battery 12 directly. The dashed-dotted line in FIG. 5 indicates that the battery set 100 is housed in the battery set housing 200, and the dashed line indicates that the charger A, battery set 100, and battery set housing 200 are held within the electric work machine. Charger A can also be removed from the electric work machine, so it is possible to take charger A and battery set 100 home and charge them.

[0035] (Other configurations) Although not shown in the drawings, the battery set 100 may further include a stand that allows the battery set 100 to stand on its own and prevent it from falling over. The stand is preferably attached so as not to interfere with the cover portion 28 or adjacent battery sets 100 when the battery set 100 is housed in the battery set housing portion 200.

[0036] <<About the battery case housing structure 300>> The battery set storage structure 300 according to the present invention mainly comprises a battery set 100 and a battery set storage section 200 that is provided inside the electric work machine and that stores the laid-down battery set 100. When it is desired to charge the battery 12, as described above, the battery set 100 can be removed from the electric work machine and carried to a location where a power source C is located for charging, or even if the battery set 100 is not removed from the electric work machine, the electric work machine itself can be moved close to the power source C and the battery 12 can be charged using a charger A provided on the electric work machine.

[0037] <Regarding the battery set housing section 200> The battery set housing section 200 will be described with reference to Figures 6 to 11. The battery set housing section 200 mainly has an opening 21 and an approach platform 22.

[0038] (Regarding opening 21) The opening 21 is an entrance for inserting and removing the battery set 100 and the charger A. It is provided on the side of the electric work machine. Also, above the opening 21, there is a cover 28 that closes the opening 21, as shown in FIG. 11 .

[0039] (About approach platform 22) As shown in Figure 6, the approach platform 22 is a platform on which the battery sets 100 are placed. The width of the approach platform 22 is formed to be the same as or greater than the width of two battery sets 100. It does not have to be the same as the width of two battery sets 100, as long as it has a width equal to the number of battery sets 100.

[0040] The approach platform 22 is provided with an inclined surface 221, wheel guides 222, engagement holes 223, notches 224, and projection holes 225.

[0041] (Regarding the inclined surface 221) In addition, a slope 221 that slopes downward from the front to the back is provided near the center of the approach platform 22. The slope 221 divides the approach platform 22 into an upper section 221a and a lower section 221b. The wheels 132 are placed on the lower section 221b at the back, and the third side surface 131d is placed on the upper section 221a. When the battery set 100 is tilted, the wheels 132 protrude downward from the third side surface 131d. Therefore, by providing a height difference on the approach platform 22 with the slope 221, the height can be adjusted so that the battery set 100 is always horizontal when stored. Therefore, the height difference of the slope 221 matches the height difference between the lowest end of the wheels 132 and the third side surface 131d.

[0042] Furthermore, by providing the inclined surface 221, the wheels 132 roll on the inclined surface 221, eliminating the need to exert extra force when storing the battery set 100. Specifically, the battery set 100 is heavy, weighing approximately 5 to 30 kg depending on its size, so once it is placed in front of the approach platform 22, it becomes difficult to control the battery set 100. Therefore, by providing the inclined surface 221 on the approach platform 22, the battery set 100 can be stored smoothly all the way to the back.

[0043] In addition, the inclined surface 221 prevents the stored battery set 100 from moving forward due to vibration, inertia, etc., and prevents the battery set 100 from coming out of the approach platform 22.

[0044] (Regarding wheel guide 222) The wheel guide 222 is provided on the approach platform 22 and guides one wheel 132 of the battery set 100 to the back of the approach platform 22. The wheel guide 222 mainly includes two vertical plates 222a, and one wheel 132 is placed in a gap 222c formed between the two vertical plates 222a. The gap 222c is formed to be the same width as the one wheel 132 or slightly larger than the width of the one wheel 132.

[0045] Wheel guides 222 are provided at both ends of approach platform 22, on the far side opposite opening 21. By guiding one wheel 132, not only can battery set 100 inserted through opening 21 be moved toward the far side to the storage position, but the stored battery set 100 can also be stopped from moving left and right due to vibration, inertia, etc.

[0046] An entrance 222b for receiving one wheel 132 is provided on the front side of the vertical plate 222a, and the entrance 222b is formed so as to expand in a V shape relative to the width of the vertical plates 222a. Therefore, even if one wheel 132 is likely to slightly deviate from the gap 222c between the vertical plates 222a, the expansion of the entrance 222b makes it easier for the one wheel 132 to enter the gap 222c through the entrance 222b.

[0047] (Regarding the engagement hole 223) The engagement hole 223 is a hole into which the protrusion 133 provided on the third side surface 131d of the case part 131 fits when the battery set 100 is housed. By fitting the protrusion 133 into the engagement hole 223, the movement of the battery set 100 is stopped.

[0048] The engagement hole 223 is an elongated hole formed so as to be elongated in the direction in which the battery set 100 is accommodated. Because the battery set 100 is accommodated in the opening 21 from the front side toward the back side, the elongated hole formed so as to be elongated in the accommodation direction makes it easier to fit the protrusion 133 into the engagement hole 223. Also, as mentioned above, the battery set 100 is heavy and difficult to control, and if the engagement hole 223 were flush with the protrusion 133, it would be difficult to fit it into. Therefore, in this respect as well, the elongated hole formed in the accommodation direction makes it easier to fit the protrusion 133 into the engagement hole 223.

[0049] Conversely, when removing the battery set 100, by making the hole longer in the direction of storage, it is possible to lift the battery set 100 diagonally upward toward the front rather than lifting it straight up, making it easier to remove the battery set 100.Even if the battery set 100 is heavy and difficult to control, it can be easily removed by lifting it diagonally upward toward the front.

[0050] The direction in which the battery set 100 is stored is perpendicular to the forward and backward direction of the electric work machine, which reduces the effect of inertial forces caused by starting or decelerating the electric work machine on the storage direction.

[0051] On the other hand, the width of the engagement hole 223 is the same as the width of the protrusion 133. Therefore, it is possible to stop the lateral movement of the housed battery set 100 due to vibration, inertia, etc. Because the left and right sides of the battery set 100 are aligned with the direction of travel of the electric work machine, it is susceptible to the force of inertia caused by starting or decelerating the electric work machine. However, by making the width of the engagement hole 223 the same as the width of the protrusion 133, it is possible to stop the battery set 100 even when the force of inertia acts.

[0052] If the weight of the battery set 100 is light and the battery set 100 is easy to control, the hole need not be a long hole, but may be a hole of the same shape as the protrusion 133, and as long as the width of the engagement hole 223 is the same as that of the protrusion 133, the shape and size of the engagement hole 223 can be changed as appropriate.

[0053] (Regarding the first stopper portion 23) The first stopper portion 23 is a plate member provided on the rear side of the approach platform on which the battery set 100 is stored, along the wheel guides 222 from the opening 21. The first stopper portion 23 extends upward from the approach platform 22 and prevents the battery set 100 from moving in the rearward direction.

[0054] An elastic member 23a is provided in the middle of the first stopper portion 23. The elastic member 23a is hemispherical and serves to absorb impact when it strikes the bottom surface 131a of the battery set 100 if the battery set 100 goes too far in the direction of the interior when the battery set 100 is stored.

[0055] (Connector part 24) A bent portion 25 and a connector portion 24 are provided on the upper portion of the first stopper portion 23. The connector portion 24 is linear and rigid, and is rotatable around the bent portion 25. A bolt or the like is provided on the bent portion 25, and the bent portion 25 functions as an axis. One end 24a of the connector portion 24 is rotatably connected to the bent portion 25, and the other end 24b is electrically connectable to the battery side connector portion 136. The length of the connector portion 24 is preferably set to a length that allows it to be connected to the battery side connector portion 136 when the battery set 100 is accommodated in the battery set accommodation portion 200.

[0056] The length of the first stopper portion 23 matches the height of the accommodated battery set 100. Therefore, the connector portion 24 is bent at a right angle and positioned above the first stopper portion 23, so that the connector portion 24 comes into contact with the first side surface 131b of the battery set 100. This prevents the battery set 100 from moving up and down due to vibrations, etc.

[0057] (Regarding the biasing means 26) The connector portion 24 is provided with a biasing means 26 that rotates upward around the bent portion 25 as a base point. In this embodiment, as shown in FIG. 8 , the biasing means 26 uses a spring 261 that is an elastic member provided on the back surface of the first stopper portion 23. One end 261a of the spring 261 is connected to one end 24a of the connector portion 24, and the other end 261b of the spring 261 is fixed to the back surface of the first stopper portion 23 by a bolt. An elastic force is applied downward to one end 24a of the connector portion 24 by the spring 261. Therefore, the bent portion 25 serves as a base point and functions as an axis, so that the other end 24b of the connector portion 24 can be kept in a biased state so as to always face upward.

[0058] When spring 261 is at its natural length, it is always biased so that other end 24b of connector portion 24 faces upward, as shown in Fig. 6. On the other hand, if spring 261 stretches beyond its natural length when attempting to lower other end 24b of connector portion 24 to connect with connector portion 24, an elastic force acts on spring 261 as it tries to return to its natural length, and as a result, connector portion 24 is biased so that it faces upward.

[0059] By providing the connector portion 24 with rigidity and by maintaining the other end 24b of the connector portion 24 in a state where it is always biased to face upward, the battery set 100 can be easily accommodated. In other words, if the connector portion 24 does not have rigidity or does not have the biasing means 26, the connector portion 24 will sag into the battery set accommodation portion 200, interfering with accommodation and making it difficult to smoothly accommodate the battery set 100. In particular, if the battery set 100 is heavy, it can be cumbersome to lift the connector portion 24 above the battery set 100 while lifting the battery set 100. Therefore, by providing the connector portion 24 with rigidity and the biasing means 26, accommodation can be easily performed.

[0060] When connecting with the battery side connector part 136, the battery set 100 is accommodated in the battery set accommodating part 200, and then the connector part 24 facing diagonally upward is tilted forward by the biasing means 26, and then the battery side connector part 136 is connected.

[0061] In this embodiment, the spring 261 is used as the biasing means 26, but instead of the spring 261, elastic rubber or the like may be used.

[0062] (Regarding static device 27) The battery set storage section 200 is equipped with a stop device 27 that prevents the battery set 100 placed on the approach platform 22 from moving forward. The stop device 27 mainly includes a knob 271, a second stopper portion 272, a lever 273, and a fulcrum fixing portion 274. The knob 271 and the second stopper portion 272 are connected by the lever 273.

[0063] (About Nobu 271) The knob 271 is a rod provided at the back of the approach table 22 and is maintained in an upright position. The stopping device 27 is activated by pushing the knob 271 from above toward the approach table 22. A cap 271a is attached to one end of the knob 271 to make it easier to push, and the other end 271b is fixed to a lever 273.

[0064] One first stopper portion 23 has a support plate 23b provided horizontally to support the vicinity of the middle of the knob 271. The support plate 23b also has a support hole 23c into which the knob 271 can be inserted. The knob 271 is inserted into the support hole 23c, which prevents the knob 271 from tipping in any direction other than the direction of the approach table 22, and keeps the knob 271 facing upright.

[0065] In this embodiment, the support plate 23b is provided on only one first stopper portion 23, but it may be provided on two first stopper portions 23. Furthermore, as will be described later, the location of the knob 271 does not have to be at the back side of the approach platform 22, as long as the knob 271 can be supported so as not to fall over and one end of the knob 271 can come into contact with the cover portion 28. Furthermore, although only one knob 271 is provided in this embodiment, two or more knobs may be provided, equal to the number of battery sets 100, if necessary.

[0066] (Regarding the second stopper portion 272) In conjunction with pushing in the knob 271, a second stopper portion 272 is provided that protrudes from the approach table 22 on the front side of the approach table 22 and prevents the battery set 100 from moving forward. In this embodiment, the second stopper portion 272 is a red rubber cylinder. The red color makes it easy for the user to see, and therefore, when the cover portion 28 is opened, it is possible to easily determine whether the immobilization device 27 is operating.

[0067] The approach platform 22 is provided with two projection holes 225 for the second stopper portions 272 to project from. The projection holes 225 are provided at positions that are on the front side of the battery sets 100 when each battery set 100 is stored. This allows the second stopper portions 272 to prevent the battery sets 100 from moving forward.

[0068] (About Lever 273) The lever 273 is a plate that connects the other end 271b of the knob 271 and the second stopper portion 272 below the approach table 22. As shown in FIG. 10 , the lever 273 mainly has two parallel levers: a first lever 273a and a second lever 273b, and a connecting plate 273c. The first lever 273a and the second lever 273b are parallel and connected to each other by the connecting plate 273c. The first lever 273a further has a force point portion 273a1, a first fulcrum portion 273a2, and a first acting portion 273a3, and the second lever 273b further has a second fulcrum portion 273b2 and a second acting portion 273b3.

[0069] The force point portion 273a1 of the first lever 273a serves as the force point, the first fulcrum portion 273a2 and the second fulcrum portion 273b2 serve as fulcrums, and the first action portion 273a3 and the second action portion 273b3 serve as the action point. Since the first lever 273a and the second lever 273b are connected via the connecting plate 273c, the force point portion 273a1 is provided on only one of the levers 273.

[0070] The other end 271b of the knob 271 is fixed to the force point 273a1 of the first lever 273a. Therefore, when the knob 271 is pressed toward the approach table 22, the force point 273a1 moves downward. When the force point 273a1 moves downward, the first acting portion 273a3 and the second acting portion 273b3 move upward.

[0071] The first fulcrum portion 273a2 and the second fulcrum portion 273b2, and the first acting portion 273a3 and the second acting portion 273b3 are further provided with a sloped portion 273d, a first flat portion 273e, a rising portion 273f, and a second flat portion 273g. The sloped portion 273d allows the lever 273 to face downward and be positioned lower than the approach table 22. By making the sloped portion 273d a slope rather than a right angle, the lever 273 is less likely to interfere with the approach table 22 when the knob 271 is pushed in. The rising portion 273f continues from the first flat portion 273e. The rising portion 273f rises at a right angle and connects to the second flat portion 273g. When the knob 271 is pushed in, the second flat portion 273g hits the back surface of the approach table 22, stopping the knob 271 from being pushed in and balancing the force. The second flat surface portion 273f continues to the second stopper portion 272.

[0072] (Regarding the fulcrum fixing part 274) The first fulcrum portion 273a2 and the second fulcrum portion 273b2 are fixed to a fulcrum fixing portion 274 provided on the approach table 22. The fulcrum fixing portion 274 is provided on the lower stage 221b adjacent to the notch portion 224, and is substantially L-shaped.

[0073] (Regarding the notched portion 224) A notch 224 is provided in the lower section 221b on the far side of the approach table 22. A part of the first lever 273a can pass through the gap in the notch 224. The first fulcrum portion 273a2 is fixed to a fulcrum fixing portion 274 on the approach table 22, so that the force point portion 273a1 to the first fulcrum portion 273a2 can pass through the notch 24 without interfering with the approach table 22.

[0074] In this embodiment, the first lever 273a and the second lever 273b are formed as a single member via the connecting plate 273c, but if necessary, the first lever 273a and the second lever 273b may be independent without using the connecting plate 273c. In this case, the same number of levers 273 and fulcrum fixing parts 274 as the number of battery sets 100 are provided.

[0075] (Regarding the cover part 28) The battery set storage section 200 has a cover section 28 that closes the opening 21. The opening 21 is opened and closed by the rotation of an opening / closing shaft 28a located at the top of the battery set 100. Closing the opening 21 with the cover section 28 prevents mud, sand, rainwater, and the like from entering through the opening 21.

[0076] Furthermore, by closing opening 21, cover portion 28 comes into contact with knob 271, allowing knob 271 to be pushed in. The depth to which knob 271 is pushed matches the height from when cover portion 28 comes into contact with knob 271 until cover portion 28 is closed. In this way, by closing cover portion 28, immobilization device 27 is automatically activated, making it possible to stop battery set 100 from moving forward.

[0077] Furthermore, since the opening / closing shaft 28a that opens and closes the cover portion 28 is located further back than the knob 271, by locating the knob 271 on the back side of the approach table 22 closer to the opening / closing shaft 28a rather than on the front side of the approach table 22, the knob 271 can be pushed in with less force using the principle of leverage. [Explanation of symbols]

[0078] 100 Battery Set 12 Battery 13 Carry-type battery case 131 Case part 131a Bottom 131b~131e 1st side~4th side 131f aperture 132 Wheels 132a Axle 133 Protrusion 134 Hand-held transport handle 134a Support 134b Grip 134c Storage section 135 Fixed Handle 135a Gripping rod 135b Support part 136 Battery side connector 200 Battery set storage compartment 21 Opening 22 Approach platform 221 Slope 221a upper section 221b lower section 222 Wheel guide 222a vertical board 222b Entrance 222c Gap 223 Engagement hole 224 Notch 225 Projection hole 23 First stopper part 23a Elastic member 23b Support plate 23c Support hole 24 Connector part 24a one end 24b other end 25 Bending section 26 Actuation means 261 Spring 261a one end 261b other end 27 Stationary device 271 Nobu 271a Cap 271b other end 272 Second stopper part 273 Leverage board 273a 1st lever plate 273a1 Force point 273a2 1st fulcrum part 273a3 1st action part 273b 2nd lever board 273b2 Second fulcrum part 273b3 2nd action part 273c Connection board 273d Slope section 273e 1st plane section 273f Rising section 273g 2nd plane part 274 Fulcrum fixed part 28 Cover 28a Opening and closing axis 300 Battery case housing structure A charger B Code C power supply

Claims

1. a battery used in an electric work machine; a carry-type battery case into which the battery can be detachably placed, The carry-type battery case is a case portion that covers the outer periphery of the battery; wheels provided on the case portion for moving the carry-type battery case; a protrusion provided on a side surface of the case; a retractable hand-held carrying handle connected to the case portion, a battery set that can be reversibly changed between a transport state in which the hand-held moving handle is extended and transported, and a storage state in which the hand-held moving handle is retracted and stored in the electric working machine; a battery set storage section that is provided in the electric working machine and that stores the battery set in a stored state, The battery set storage section is an opening for inserting and removing the battery set; an approach table on which the battery set is placed, The approach platform includes a wheel guide that guides the wheels; an engagement hole that is fitted into the protrusion; A battery set housing structure comprising:

2. The battery set storage structure described in claim 1, characterized in that the battery set storage section has a first stopper portion extending upward from the approach platform at the rear side of the approach platform where the battery set is stored from the opening along the wheel guide.

3. The battery set accommodating portion has a bent portion on an upper portion of the first stopper portion. a rigid connector portion that is connected to the battery and rotates around the bent portion; The battery set housing structure according to claim 2, further comprising:

4. 4. The battery set housing structure according to claim 3, wherein the battery set housing portion includes a biasing means for rotating the connector portion upward around the bent portion as a base point.

5. the battery set storage section is provided with a restraining device that prevents the battery set placed on the approach platform from moving forward, The stationary device includes a knob that is pushed toward the approach table; a second stopper portion that protrudes from the approach platform on the front side of the approach platform in response to the knob being pressed in, and prevents the battery set from moving forward; The battery set housing structure according to any one of claims 1 to 4, further comprising:

6. the battery set housing has a cover that closes the opening, 6. The battery set housing structure according to claim 5, wherein the cover portion interferes with the knob and pushes the knob in when the opening is closed.

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