Electrical components

Abstract

To prevent freezing of electrical component contacts with a simple configuration. [Solution] The battery relay 1, an electrical component of a work machine, comprises a movable contact 4 housed in a case 2, a contact-side terminal 5 which is a fixed contact housed in the case 2 and partially exposed to the outside of the case 2, a harness 6 which is located outside the case 2 and electrically connected to at least one of the contact-side terminal 5 or the excitation-side terminal 7, and a heat storage material 8 attached to the outer circumference of the harness 6. The heat storage material 8 comprises a plurality of heat storage sections 811 and flexible sections 812 which connect the heat storage sections 811 to each other.

Description

Technical Field

[0001] The present disclosure relates to electrical components of a working machine.

Background Art

[0002] Conventionally, when starting or stopping a vehicle, a relay is used to supply or cut off power to electronic devices and power supply devices mounted on the vehicle. For example, when operating a relay in a low-temperature environment below freezing point, in order to prevent the contacts of the relay from freezing, techniques for preventing the freezing of the contacts are known, such as changing the drive pattern of the relay or adding a temperature control device.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the techniques described in Patent Documents 1 to 2, electronic components such as a control device for controlling a relay and a sensor for measuring temperature are required.

[0005] In addition, in order to attach to the electric wire of the electrical component of the working machine, it is desirable that the shape can be deformed according to the wiring state of the electric wire.

[0006] An object of the present disclosure is to prevent freezing of contacts of electrical components with a simple configuration.

Means for Solving the Problems

[0007] The electrical component relating to this disclosure is an electrical component for a work machine, comprising: a movable contact housed in a case; a fixed contact housed in the case with a portion exposed to the outside of the case; an electric wire disposed outside the case and electrically connected to at least one of the fixed contact or the movable contact; and a heat storage material attached to the outer circumference of the electric wire, wherein the heat storage material comprises a plurality of heat storage sections and flexible sections connecting the heat storage sections to each other.

[0008] The electrical component relating to this disclosure is an electrical component for a work machine and comprises a movable contact housed in a case, a fixed contact housed in the case with a portion exposed to the outside of the case, and a heat storage material connected to the fixed contact, wherein the heat storage material comprises a case, a heat storage portion housed in the case, and a connector connected to the fixed contact. [Effects of the Invention]

[0009] According to this disclosure, it is possible to prevent the freezing of electrical component contacts with a simple configuration. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 is a schematic side view showing the configuration of the work machine according to the first embodiment. [Figure 2] Figure 2 is a perspective view of the battery relay according to the first embodiment. [Figure 3] Figure 3 is a schematic diagram showing the configuration of the battery relay according to the first embodiment. [Figure 4] Figure 4 is a schematic diagram illustrating the operation of the battery relay according to the first embodiment. [Figure 5] Figure 5 is a perspective view of the heat storage material shown in Figure 1. [Figure 6] Figure 6 is a perspective view of Modification 1 of the heat storage material. [Figure 7] Figure 7 is a perspective view of a modified example 2 of the heat storage material. [Figure 8] Figure 8 is a perspective view of the battery relay according to the second embodiment. [Figure 9]FIG. 9 is a perspective view of the heat storage material of FIG. 8. [Figure 10] FIG. 10 is a cross-sectional view of the heat storage material of FIG. 8. [Figure 11] FIG. 11 is a perspective view of another modification of the battery relay.

Mode for Carrying Out the Invention

[0011] Hereinafter, embodiments according to the present disclosure will be described with reference to the drawings, but the present disclosure is not limited to the embodiments. The components of the embodiments described below can be combined as appropriate. Also, some components may not be used.

[0012] In the embodiment, as an example of the working machine, a hydraulic excavator will be described, but the present disclosure is applicable to other working machines such as forklifts, wheel loaders, bulldozers, dump trucks, etc., in addition to hydraulic excavators.

[0013] [First Embodiment] <Working Machine> FIG. 1 is a side view schematically showing the configuration of a working machine according to the first embodiment. As shown in FIG. 1, the working machine 100 in the first embodiment is, for example, a hydraulic excavator.

[0014] The working machine 100 includes a vehicle body 102 and a working device 104. The working device 104 is attached to the vehicle body 102 so as to be operable. The working device 104 is driven by, for example, a hydraulic cylinder.

[0015] The vehicle body 102 includes a machine room 110. The machine room 110 is configured to form a space for accommodating an auxiliary battery 120 and a power source 130.

[0016] The auxiliary battery 120 supplies power to electrical equipment mounted on the working machine 100 including, for example, a controller (not shown). In the embodiment, the auxiliary battery 120 is disposed inside the machine room 110.

[0017] The power source 130 supplies the power required to drive the work machine 100. The power source 130 is, for example, a high-voltage drive battery different from the engine, fuel cell, hydraulic pump, and auxiliary battery 120. The power source 130 is located inside the machine room 110. In one embodiment, the power source 130 is located adjacent to the auxiliary battery 120.

[0018] <Battery relay> An example of the configuration of a battery relay as an electrical component will be explained using Figures 2 and 3. Figure 2 is a perspective view of the battery relay according to the first embodiment. Figure 3 is a schematic diagram showing the configuration of the battery relay according to the first embodiment.

[0019] The battery relay 1 is located inside the machine room 110. In this embodiment, the battery relay 1 is located adjacent to the auxiliary battery 120 (see Figure 1). The battery relay 1 houses a coil 3 and a movable contact 4 within a case 2. Part of the contact-side terminal (fixed contact) 5 and part of the excitation-side terminal 7 are exposed on the outside of the case 2. A harness (electric wire) 6 is connected to the contact-side terminal 5.

[0020] The movable contact 4 moves relative to the contact-side terminal 5, which is a fixed contact. The movable contact 4 moves due to the action of the coil 3. When the movable contact 4 and the contact-side terminal 5 come into contact, an electrical connection is made. When the work machine 100 is in operation (i.e., when the key is on), the movable contact 4 comes into contact with the contact-side terminal 5 and an electrical connection is made. When the work machine 100 is not in operation (i.e., when the key is off), the movable contact 4 moves away from the contact-side terminal 5.

[0021] The contact-side terminal 5, which is a fixed contact, is housed in the case 2, with a portion of it exposed to the outside of the case 2. The contact-side terminal 5 comprises a fixed contact terminal 50 and a fixed contact fastening member (not shown).

[0022] The fixed contact terminal 50 is exposed to the outside of case 2. The fixed contact terminal 50 is fastened by a fixed contact fastening member and is electrically connected. The fixed contact terminal 50 is electrically connected to harness 6 via harness terminal 60 and harness fastening member 61 of harness 6.

[0023] The fixed contact fastening member has one axial side housed in case 2 and the other side exposed to the outside of case 2. The fixed contact fastening member is positioned across the inside and outside of case 2. The portion of the fixed contact fastening member exposed to the outside of case 2 is fastened in contact with the fixed contact terminal 50.

[0024] The harness 6 is a battery cable that electrically connects the auxiliary battery 120 and the battery relay 1. The harness 6 is made of conductive material covered with an insulating material. The harness 6 is electrically connected to the contact-side terminal 5 via harness terminals 60 and harness fastening members 61. The harness terminals 60 and the fixed contact terminals 50 are fastened together by the harness fastening members 61 while they are overlapping.

[0025] The excitation terminal 7 is electrically connected to the coil 3.

[0026] <Heat storage material> Figure 5 is a perspective view of the heat storage material in Figure 1. The heat storage material 8 is attached to the outer circumference of the harness 6. The heat storage material 8 is intended to prevent the contact-side terminal 5, which is a fixed contact of the battery relay 1, from freezing. When the work machine 100 is in operation, the heat storage material 8 stores heat from the heat inside the machine room 110. For example, when the work machine 100 is in operation, the heat storage material 8 stores heat from the heat released from the power source 130 and coil 3. When the work machine 100 transitions from an operating state to a non-operating state, and thereafter the harness 6 and ambient temperature become lower than the temperature of the heat storage material 8, the heat storage material 8 releases the stored heat to keep the harness 6 warm.

[0027] The heat storage material 8 comprises a main body 81 and grooves 82. The main body 81 is formed in a cylindrical shape. Grooves 82 are formed in the main body 81 along the axial direction. The main body 81 comprises a heat storage section 811 and a flexible section 812. The heat storage section 811 and the flexible section 812 are arranged alternately in the axial direction. The heat storage section 811 contains a heat storage material inside. The flexible section 812 does not contain a heat storage material. The flexible section 812 is flexible. The flexible section 812 may be an insulating material. The flexible section 812 connects adjacent heat storage sections 811 in the axial direction. Due to the grooves 82 formed in the heat storage section 811 and the flexible section 812, the axial cross-section is C-shaped.

[0028] The groove 82 is formed along the entire axial length of the main body 81. When the heat storage material 8 is attached to the harness 6, the harness 6 is housed in the space of the main body 81 through the groove 82.

[0029] The heat storage material 8 is positioned closer to the harness terminal 60 of the harness 6. In other words, the heat storage material 8 is positioned closer to the contact-side terminal 5 on the harness 6.

[0030] The heat storage material 8 is made of a material that undergoes a phase change within a temperature range between the operating and non-operating states of the work machine 100. The heat storage material 8 is made of a material that undergoes a phase change within a predetermined temperature range, for example, between 20°C and 30°C. The heat storage material 8 maintains the temperature before and after the phase change for a certain period of time. The heat storage material 8 uses a material that undergoes a phase change within the above temperature range and maintains a constant temperature. Therefore, outside of this temperature range, the temperature of the heat storage material 8 changes in accordance with the ambient temperature, such as the outside air temperature.

[0031] The predetermined temperature range in which the heat storage material 8 undergoes a phase change may be set to an upper limit of, for example, a temperature approximately 10°C lower than the assumed ambient temperature near the battery relay 1 during the operation of the work machine 100 in a cold region. The predetermined temperature range in which the heat storage material 8 undergoes a phase change may be set to a lower limit of, for example, a temperature higher than 0°C, the temperature at which water freezes.

[0032] <effect> The function of the heat storage material 8 in the battery relay 1 will be explained using Figure 4. Figure 4 is a schematic diagram illustrating the function of the battery relay according to the first embodiment. In this embodiment, the heat storage material 8 is described as being made of a material that undergoes a phase change at a temperature of approximately 20°C to 30°C.

[0033] Figure 4(a) shows the state of the battery relay 1 when the work machine 100 is in operation (i.e., when the key is off). Due to the heat emitted from the power source 130 (see Figure 1) and coil 3, the surrounding area A1 centered on the case 2 and the surrounding area A2 of the harness 6 become hot. The surrounding areas A1 and A2 become hotter than the predetermined temperature range in which the heat storage material 8 undergoes a phase change. When the surrounding area A1 centered on the case 2 becomes hot, the temperature inside the case 2 rises, and the moisture 200 inside the case 2 is heated and turns into water vapor. Also, when the surrounding area A2 of the harness 6 becomes hot, the heat storage material 8 absorbs heat and stores thermal energy.

[0034] Figure 4(b) shows the state of the battery relay 1 when the work machine 100 transitions from an operating state to a non-operating state (i.e., when it transitions from key on to key off). Immediately after the work machine 100 transitions from an operating state to a non-operating state, the temperature inside the case 2 and the temperature of the harness 6 are kept high. When the work machine 100 becomes non-operating, the temperature of the surrounding area A1 centered on the case 2 and the surrounding area A2 of the harness 6 gradually decreases due to the ambient temperature. The temperature of the surrounding area A1 centered on the case 2 decreases faster than the temperature inside the case 2, so a temperature difference occurs on the wall surface of the case 2. As a result, moisture 200 inside the case 2 adheres to the wall surface of the case 2, causing condensation on the wall surface of the case 2.

[0035] On the other hand, the temperature of the harness 6 decreases faster than the temperature inside the case 2 because it dissipates the absorbed heat into the outside air. However, since the harness 6 is kept at a constant temperature by the heat storage material 8, the temperature of the contact-side terminal 5 via the harness 6 decreases more slowly than the temperature inside the case 2. As a result, the temperature difference between the contact-side terminal 5 and the inside of the case 2 is suppressed, and condensation on the contact-side terminal 5 can be suppressed.

[0036] Figure 4(c) shows the state of the battery relay 1 after a certain period of time has elapsed since the work machine 100 transitioned from an operating state to a non-operating state. The temperature of the surrounding area A1 centered on case 2 and the surrounding area A2 of harness 6 decreases from a high temperature to a temperature similar to the ambient temperature. Therefore, if the ambient temperature is below freezing, the inside of case 2 cools rapidly, and the moisture 200 adhering to the wall surface of case 2 freezes. On the other hand, the contact-side terminal 5 is prevented from freezing due to moisture 200.

[0037] When the work machine 100 is operating as shown in Figure 4(c), the surface of the contact-side terminal 5 is not frozen even if the ambient temperature is below freezing. As a result, the battery relay 1 can be electrically connected by ensuring good contact between the movable contact 4 and the contact-side terminal 5.

[0038] <Effects> As described above, in this embodiment, a heat storage material 8 made of a material that undergoes a phase change in a predetermined temperature range is attached to the outer circumference of the harness 6. According to this embodiment, the heat storage material 8 can prevent the freezing of the contact-side terminal 5 of the battery relay 1 by utilizing the heat generated by the vehicle body when the work machine 100 is in operation. According to this embodiment, by using the heat storage material 8, temperature changes of the contact-side terminal 5 of the battery relay 1 when the work machine 100 is not in operation can be suppressed. According to this embodiment, the freezing of the contacts of the battery relay 1 can be prevented with a simple configuration without changing the electrical circuit or electrical control to prevent contact freezing.

[0039] In this embodiment, the heat storage portion 811 of the heat storage material 8 is not a single unit in the axial direction, but is divided into multiple portions. In this embodiment, the multiple heat storage portions 811 are connected by a flexible portion 812. As a result, according to this embodiment, the harness 6 can easily follow the wiring condition and deformation due to vibration.

[0040] In this embodiment, since the heat storage material 8 is equipped with a flexible portion 812, when the harness 6 is housed in the space of the main body 81, the flexible portion 812 deforms to match the wiring configuration of the harness 6, allowing it to be easily wrapped around. As a result, this embodiment can also be applied to the electrical components of work vehicles that have already been shipped.

[0041] In this embodiment, the heat storage material 8 is maintained within a predetermined temperature range without the use of a heater or the like. As a result, this embodiment can suppress the reduction in lifespan of the resin components constituting the battery relay 1 and the auxiliary battery 120 located near the battery relay 1 due to thermal effects.

[0042] In this embodiment, the heat storage material 8 changes temperature in accordance with the ambient temperature of the battery relay 1, except in temperature ranges other than the phase change temperature. According to this embodiment, unlike an insulating material, the heat storage material 8 can prevent excessive temperature rise by unintentionally insulating the work machine 100 even when it is operated in a high-temperature work site.

[0043] The embodiment does not require a control device for controlling the battery relay 1 or electronic components to prevent freezing, such as a sensor for measuring temperature. According to the embodiment, freezing of the contacts of the battery relay 1 can be prevented with a simple configuration without changing the electrical circuit or electrical control to prevent contact freezing.

[0044] In this embodiment, since no electrical circuit is used to suppress temperature changes in the battery relay 1, there is no need to supply voltage to the battery relay 1 after the key switch is turned OFF. According to this embodiment, after the key switch is turned OFF, the ambient temperature around the battery relay 1 reaches a temperature that causes a phase change in the heat storage material 8, thereby preventing the contacts of the battery relay 1 from freezing.

[0045] In this embodiment, since the heat storage material 8 is attached to the outer circumference of the electrically insulated harness 6, maintenance work on the work machine 100 can be simplified.

[0046] According to this embodiment, the heat storage capacity can be adjusted by changing the shape of the heat storage material 8, such as the area where the heat storage material 8 is attached and the thickness of the heat storage material 8. The embodiment can be adapted to various types of work machines by appropriately changing the shape of the heat storage material 8.

[0047] The embodiment can be easily combined with other antifreeze measures. When used in combination with a heater, the embodiment can reduce the heater's power consumption and heating time.

[0048] [Example 1] Figure 6 is a perspective view of a modified example 1 of the heat storage material. The heat storage material 8 comprises a main body 81. The main body 81 is formed in a sheet shape. The main body 81 comprises a flexible portion 810 and a heat storage portion 811. The main body 81 is wrapped around the outer circumference of the harness 6.

[0049] The flexible portion 810 is a single sheet with flexibility. The flexible portion 810 connects adjacent heat storage portions 811 in at least one of the axial and circumferential directions of the harness 6. The flexible portion 810 may be an insulating material. The flexible portion 810 does not have to be a heat storage material. The flexible portion 810 may cover the front and back surfaces of multiple heat storage portions 811. The flexible portion 810 may house multiple heat storage portions 811 inside.

[0050] The heat storage unit 811 contains a heat storage material inside. Multiple heat storage units 811 are arranged in a row along at least one of the axial or circumferential directions of the harness 6. In the modified example 1, a total of eight heat storage units 811 are arranged: two in the axial direction and four in the circumferential direction.

[0051] Multiple heat storage units 811 may be composed of materials with different phase change temperature ranges. For example, in Figure 6, four of the eight heat storage units 811 undergo a phase change at approximately 20°C to 30°C, while the remaining four are composed of materials that undergo a phase change at approximately 30°C to 40°C.

[0052] <Effects> In Modification 1, the heat storage portion 811 of the heat storage material 8 is not a single unit but is divided into multiple parts. In Modification 1, the multiple heat storage portions 811 are connected by a flexible portion 810. As a result, according to Modification 1, the harness 6 can be more easily adapted to the wiring condition and deformation due to vibration.

[0053] In Modification 1, the flexible portion 810 of the heat storage material 8 can be deformed to match the wiring condition of the harness 6, so the heat storage material 8 can be easily wrapped around the outer circumference of the harness 6. In Modification 1, freezing of the contacts of the battery relay 1 can be prevented with a simple configuration.

[0054] In the modified example 1, the heat storage unit 811 is housed inside, so it is possible to prevent the heat storage unit 811 from leaking out to the outside.

[0055] In the first modified example, heat storage units 811 with different phase change temperature ranges can be combined and arranged. This makes it possible to maintain a constant temperature across multiple temperature ranges.

[0056] [Differentiation 2] Figure 7 is a perspective view of a modified example 2 of the heat storage material. The heat storage material 8 of modified example 2 includes a first protective part 813 and a second protective part 814 in addition to the heat storage material 8 of modified example 1.

[0057] The first protective section 813 is connected to one of the four sides of the flexible section 810 along the axial direction. The first protective section 813 is flexible. The first protective section 813 may be made of thermal insulation material. The first protective section 813 is wrapped around the outer circumference of the harness 6 at least once. The heat storage section 811 and the flexible section 810 are wrapped around the first protective section 813.

[0058] The second protective section 814 is connected to one of the four sides of the flexible section 810 and the other side opposite to it. The second protective section 814 is flexible. The second protective section 814 may be made of thermal insulation material. The second protective section 814 is wrapped around the heat storage section 811 and the flexible section 810 at least once.

[0059] In modified example 2, the first protective section 813 is wrapped around the harness 6, the heat storage section 811 and the flexible section 810 are wrapped around the first protective section 813, and the second protective section 814 is wrapped around the heat storage section 811 and the flexible section 810.

[0060] <Effects> According to the modified example 2, the first protective part 813 is wrapped around the harness 6, so that contact and friction between the harness 6 and the heat storage part 811 can be suppressed.

[0061] According to the modified example 2, the second protective part 814 is wrapped around the heat storage part 811 and the flexible part 810, thereby improving the heat insulation effect of the heat storage part 811.

[0062] [Second Embodiment] A second embodiment will be described using Figures 8 to 10. Figure 8 is a perspective view of the battery relay according to the second embodiment. Figure 9 is a perspective view of the heat storage material in Figure 8. Figure 10 is a cross-sectional view of the heat storage material in Figure 8. In the second embodiment, the heat storage material 8 is connected to the fixed contact terminal 50 of the contact-side terminal 5.

[0063] The contact-side terminal 5 includes a first fixed contact terminal 50a and a second fixed contact terminal 50c. The first fixed contact terminal 50a and the second fixed contact terminal 50c are exposed to the outside of the case 2.

[0064] The first fixed contact terminal 50a is exposed to the outside of the case 2. A fastening hole 50b is provided in the first fixed contact terminal 50a. The fastening hole 50b is fastened to and electrically connected by a fixed contact fastening member (not shown).

[0065] The fixed contact fastening member has one axial side housed in the case 2, and the other side, which is fastened to the fastening hole 50b, is exposed to the outside of the case 2. The fixed contact fastening member is positioned across the inside and outside of the case 2. The portion of the fixed contact fastening member exposed to the outside of the case 2 is fastened in contact with the first fixed contact terminal 50a.

[0066] The second fixed contact terminal 50c is exposed to the outside of the case 2. A fastening hole 50d is provided in the second fixed contact terminal 50c. The harness terminal 60 and harness fastening member 61 of the harness 6 are fastened to the second fixed contact terminal 50c and the fastening hole 50d, and are also electrically connected to the harness 6.

[0067] The heat storage material 8 comprises a case 85, a heat storage section 86, and a connector 87. The case 85 is a protective container that houses the heat storage section 86 in its internal space. The case 85 has partition walls 85a arranged in its internal space.

[0068] Connector 87 is a connector for supplying heat from the fixed contact terminal 50 to the heat storage unit 86. Connector 87 is connected to the second fixed contact terminal 50c of the fixed contact terminal 50 of the contact-side terminal 5. Connector 87 is connected to the heat storage unit 86.

[0069] The heat storage section 86 may be made of the same material as the heat storage material 8 in the first embodiment, or of other materials. The heat storage section 86 is housed in a case 85. Two heat storage sections 86 are arranged in the internal space of the case 85. A partition wall 85a of the case 85 is interposed between the two heat storage sections 86.

[0070] When the work machine 100 is in operation, the heat storage material 8 stores heat from the fixed contact terminal 50 via the connector 87. Immediately after the work machine 100 transitions from operation to non-operation, the heat storage material 8 maintains a constant temperature to keep the connector 87 warm, thereby suppressing heat loss from the contact-side terminal 5 via the connector 87.

[0071] <Effects> As described above, according to the embodiment, the heat storage material 8 can be used to suppress temperature changes in the contact-side terminal 5 of the battery relay 1 when the work machine 100 is not in operation. According to the embodiment, freezing of the contacts of the battery relay 1 can be prevented with a simple configuration without changing the electrical circuit or electrical control to prevent contact freezing.

[0072] According to this embodiment, by housing the heat storage material 8 in the case 85, the overall surface area of ​​the heat storage material 8 can be reduced, thereby reducing heat dissipation loss from sources other than the connector 87. The embodiment can reduce the overall weight of the heat storage material 8. The embodiment can improve vibration resistance.

[0073] <Other variations> Figure 11 is a perspective view of another modification of the battery relay. The battery relay 1 of the work machine 100 may have cooling fins 9 arranged around the outer circumference of the case 2, for example.

[0074] The above description concerns the application to the battery relay 1 of the work machine 100, but it is not limited to this. For example, it may also be an electromagnetic contactor or an electromagnetic switch, and can be applied to electrical components for switching the power supply to the electrical equipment of the work machine. This makes it possible to prevent the contacts of electrical components from freezing in work machines that operate in cold regions, for example.

[0075] In the above description, the heat storage material 8 is attached to a harness 6 that is attached to the fixed contact terminal 50 of the contact-side terminal 5, but it is not limited to this. The heat storage material 8 may also be attached to a harness (not shown) that is attached to the excitation-side terminal 7 on the movable contact 4 side. This prevents the movable contact 4 from freezing.

[0076] Furthermore, the heat storage material 8 may be attached to both the harness 6 attached to the fixed contact terminal 50 of the contact-side terminal 5 and the harness attached to the excitation-side terminal 7. This makes it possible to more reliably prevent the contacts of the battery relay 1 from freezing. [Explanation of symbols]

[0077] 1...Battery relay, 2...Case, 3...Coil, 4...Movable contact, 5...Contact-side terminal (fixed contact), 50...Fixed contact terminal, 6...Harness (electric wire), 60...Harness terminal, 61...Harness fastening member, 7...Excitation-side terminal, 8...Heat storage material, 81...Main body, 811...Heat storage section, 812...Flexible section, 82...Groove, 100...Working machine (hydraulic excavator), 102...Vehicle body, 104...Working equipment, 110...Machine room, 120...Auxiliary battery, 130...Power source.

Claims

1. Electrical components for industrial machinery, The movable contacts housed in the case, A fixed contact housed in the aforementioned case, with a portion of it exposed to the outside of the case, A wire is located outside the case and is electrically connected to at least one of the fixed contact or the movable contact, A heat storage material attached to the outer circumference of the aforementioned electric wire, Equipped with, The heat storage material comprises a plurality of heat storage sections and flexible sections connecting the heat storage sections to each other. Electrical components.

2. The heat storage section is cylindrical, and multiple sections are arranged in a row along the axial direction of the electric wire. The flexible portion connects adjacent heat storage portions in the axial direction of the electric wire. The electrical component according to claim 1.

3. The heat storage material and the flexible portion are provided with grooves formed along the axial direction of the electric wire. The electrical component according to claim 2.

4. Multiple heat storage units are arranged in a line in at least one direction, either axially or circumferentially, of the electric wire. The flexible portion is a single sheet-like structure that connects adjacent heat storage portions in at least one of the axial and circumferential directions of the electric wire. The electrical component according to claim 1.

5. A first protective part connected to one of the four sides of the flexible part along the axial direction, A second protective portion is connected to the other side of the four sides of the flexible portion that is opposite to the aforementioned side, Equipped with, The first protective part is wrapped around the outer circumference of the electric wire, The heat storage section and the flexible section are wrapped around the first protective section. The second protective part is wrapped around the heat storage part and the flexible part, The electrical component according to claim 4.

6. The heat storage material is made of a material that undergoes a phase change in a predetermined temperature range. The electrical component according to claim 1.

7. The heat storage material is attached to the wire that is electrically connected to the fixed contact. The electrical component according to claim 1.

8. The heat storage material is positioned in the electric wire at a location where it can conduct heat between itself and the fixed contact. The electrical component according to claim 7.

9. The heat storage material is positioned in the electric wire at a location close to the fixed contact. The electrical component according to claim 8.

10. Electrical components for industrial machinery, The movable contacts housed in the case, A fixed contact housed in the aforementioned case, with a portion of it exposed to the outside of the case, A heat storage material connected to the aforementioned fixed contact, Equipped with, The heat storage material comprises a case, a heat storage section housed in the case, and a connector connected to the fixed contact. Electrical components.

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