Protective cover, finger contact prevention assembly, relay, charging device and carrier

Abstract

The utility model provides a protective cover, an anti-contact finger assembly, a relay, a charging device and a carrier, the protective cover comprises an upper cover and an upper installation part, the upper installation part is connected to one side of the upper cover and is used for being connected with a relay housing, and the protective cover also comprises a limiting structure surrounding the periphery of the upper installation part. The limiting structure is provided with a plurality of wire outlets distributed in the circumferential direction. According to the utility model, the charging wires connected with the relay are separated from each other by using the plurality of wire outlets of the protective cover, so that the mutual contact between the terminals of the charging wires is avoided, the accidental conduction of the charging wires is prevented, and the use safety of the carrier is ensured.

Description

Technical Field

[0001] The utility model relates to the field of robots, in particular to a protective cover, an anti-touch finger assembly comprising the protective cover, a relay comprising the anti-touch finger assembly, a charging device comprising the relay, and a transport vehicle comprising the relay. Background Art

[0002] Automated guided vehicles (AGVs), also known as automated guided vehicles (AGVs) or laser-guided vehicles, are widely used in warehousing and equipment manufacturing. Their distinguishing feature is their unmanned operation. AGVs are typically equipped with an automatic guidance system (AGS), which allows them to travel along predetermined routes without human piloting, autonomously transporting goods or materials from their starting point to their destination.

[0003] An unmanned guided vehicle (AGV) typically has an internal battery for energy storage. When the vehicle's battery is running low or when it's idle, it automatically relocates to a charging station for recharging. The vehicle's exterior features charging contacts, which are connected to the battery via an internal charging cable, thereby drawing power from the charging station. To ensure the charging cable is only active during charging, a relay is typically installed on the cable. During charging, the vehicle controls the relay to energize the cable, connecting it to the charging station.

[0004] However, in the existing relay solution, a short circuit often occurs between the charging line terminals connected to the high-voltage lead-out end of the relay, causing the charging line to be connected during non-charging time, energizing the battery and the electrodes on the outside of the unmanned guided vehicle, which in turn causes objects in contact with the vehicle to become charged or causes a short circuit failure in the battery built into the unmanned guided vehicle, affecting the safety of the unmanned guided vehicle.

[0005] Therefore, how to provide a relay structure that can ensure the insulation between the high-voltage lead-out terminals has become a technical problem that needs to be solved urgently in this field. Utility Model Content

[0006] The present invention aims to address one of the technical problems in the related art to a certain extent. To this end, the present invention provides a protective cover, an anti-touch finger assembly including the protective cover, a relay including the anti-touch finger assembly, a charging device including the relay, and a transport cart including the relay. The anti-touch finger assembly can keep charging cables separated from each other through cable management teeth, preventing contact between the charging cable terminals and ensuring the safety of the transport cart.

[0007] To achieve the above-mentioned purpose, as one aspect of the present invention, a protective cover is provided, comprising an upper cover and an upper mounting portion, wherein the upper mounting portion is connected to one side of the upper cover and is used to connect to the relay housing, and the protective cover also includes a limiting structure surrounding the upper mounting portion, and the limiting structure has a plurality of wire outlets distributed along the circumferential direction.

[0008] Optionally, the limiting structure includes a plurality of wire-managing teeth, one end of each of the wire-managing teeth is fixedly connected to the upper cover, and the other end extends along a side away from the upper cover, and the wire outlet is formed between adjacent wire-managing teeth.

[0009] Optionally, the protective cover is made of transparent material.

[0010] Optionally, the protective cover is made of polypropylene.

[0011] As a second aspect of the present invention, an anti-touch finger assembly is provided, which includes a fixing seat and a protective cover provided by the present invention. The fixing seat is used to be sealed and connected to the opening of the relay housing, and the upper mounting portion of the protective cover is fixedly connected to the fixing seat.

[0012] Optionally, the fixing seat includes a connecting portion and a lower mounting portion that are interconnected, the connecting portion is used to be sealed and connected to the opening of the relay housing, the upper cover and the connecting portion are arranged opposite to each other, the upper mounting portion and the lower mounting portion are located between the upper cover and the connecting portion, and the upper mounting portion and the lower mounting portion are detachably connected to each other, and the limiting structure is fixedly connected to the upper cover.

[0013] Optionally, the connecting portion includes a pair of wire avoidance structures, the lower mounting portion includes a partition plate, the wire avoidance structures are distributed on both sides of the partition plate, a partition plate slot is formed in the upper mounting portion, and the partition plate is accommodated in the partition plate slot.

[0014] Optionally, the connecting portion includes a connecting ring and a wiring positioning ring arranged in pairs, the connecting ring is used to connect to the opening of the relay housing, the wiring positioning ring is connected between the two sides of the partition plate and the inner side of the connecting ring, and the outlet wire avoidance structure is a hole in the wiring positioning ring.

[0015] Optionally, the partition plate has a first fixing portion, and the side wall of the partition plate slot has a second fixing portion, and the first fixing portion and the second fixing portion can be connected to each other when the partition plate enters the partition plate slot to fix the partition plate in the partition plate slot.

[0016] Optionally, the first fixing portion protrudes toward a side away from the partition plate, and the second fixing portion protrudes toward an interior of the partition plate slot, and the first fixing portion and the second fixing portion can be buckled when the partition plate enters the partition plate slot.

[0017] Optionally, one of the first fixing portion and the second fixing portion is a protrusion structure, and the other is a groove structure.

[0018] Optionally, the first fixing portion and the second fixing portion can be adhesively connected or magnetically connected when the partition plate enters the partition plate slot.

[0019] Optionally, the partition plate has a first hollow groove that passes through the partition plate in a thickness direction and extends toward the connecting portion, and the first fixing portion is located on a side of the partition plate that is away from the first hollow groove.

[0020] Optionally, the lower mounting portion further includes a connecting cylinder, the connecting cylinder being located on a side of the partition plate away from the first fixing portion, the connecting cylinder being used to selectively connect the inner cavity of the relay housing with the outside;

[0021] The upper mounting portion includes a mounting sleeve and a clamping block, the mounting sleeve is connected between the upper cover and the clamping block, the partition slot is formed in the mounting sleeve, and the clamping block is located on a side of the partition slot away from the first fixing portion;

[0022] The clamping block has a third fixing portion, and the connecting tube has a fourth fixing portion on a side facing away from the partition plate. The third fixing portion and the fourth fixing portion can be connected to each other when the partition plate enters the partition plate slot.

[0023] Optionally, the third fixing portion protrudes toward one side of the second fixing portion, and the fourth fixing portion is a groove formed on the side wall of the connecting tube. The third fixing portion can be buckled into the fourth fixing portion when the partition plate enters the partition plate slot.

[0024] Optionally, the fourth fixing portion passes through the side wall of the connecting tube along the thickness direction of the side wall of the connecting tube.

[0025] Optionally, the third fixing portion and the fourth fixing portion are both convex structures.

[0026] Optionally, the third fixing portion and the fourth fixing portion can be adhesively connected or magnetically connected when the partition plate enters the partition plate slot.

[0027] Optionally, the clamping block has a second hollow groove that passes through the thickness direction of the partition plate and extends toward the upper cover, and the second hollow groove is located on a side of the third fixing portion away from the partition slot.

[0028] Optionally, an air extraction avoidance hole is further formed in the mounting sleeve, and the position of the air extraction avoidance hole corresponds to the position of the connecting tube and is interconnected.

[0029] Optionally, the air extraction avoidance hole is connected to the partition slot.

[0030] Optionally, the cross-section of the connecting tube is rectangular.

[0031] Optionally, the cross-sectional shape of the air extraction avoidance hole corresponds to the cross-sectional shape of the connecting tube.

[0032] Optionally, the connecting tube is connected between the partition plate and the connecting ring.

[0033] Optionally, the upper cover has at least one first exhaust hole penetrating the upper cover along the thickness direction, and the first exhaust hole is connected to the partition slot.

[0034] Optionally, the upper cover further has at least one second exhaust hole penetrating the upper cover along the thickness direction, and the second exhaust hole is connected to the air extraction avoidance hole.

[0035] Optionally, the protective cover further includes a reinforcement ring, which is connected to a side of the upper cover facing the connecting portion, and the limiting structure is fixedly connected to the connecting portion via the reinforcement ring.

[0036] Optionally, both sides of the upper mounting portion along the radial direction of the upper cover are connected to the reinforcement ring.

[0037] Optionally, the cross-section of the wire management teeth is a rectangle, a rounded rectangle, or a chamfered rectangle.

[0038] Optionally, the cross-sectional dimension of the wire organizing teeth gradually decreases along a side close to the connecting portion.

[0039] As a third aspect of the present invention, a relay is provided, which includes a relay housing, an electromagnetic switch, a paired high-current lead-out structure, and an anti-touch finger assembly provided by the present invention. The electromagnetic switch is arranged in the relay housing, and the fixing seat of the anti-touch finger assembly is sealed with the opening of the relay housing. One end of the high-current lead-out structure is located between the fixing seat and the protective cover, and multiple outlets surround the high-current lead-out structure. The other end of the high-current lead-out structure passes through the fixing seat and is connected to the electromagnetic switch. The electromagnetic switch can selectively turn on the high-current lead-out structure.

[0040] Optionally, the connecting portion includes outgoing line avoidance structures arranged in pairs, and the high-voltage lead-out structure passes through the outgoing line avoidance structures and is connected to the electromagnetic switch.

[0041] Optionally, the relay further includes an air extraction valve, and the lower mounting portion further includes a connecting cylinder, and the air extraction valve passes through the connecting cylinder and communicates with the inner cavity of the relay housing.

[0042] As a fourth aspect of the present invention, a charging device is provided, comprising a plurality of charging contacts and a plurality of charging cables, wherein the plurality of charging cables are electrically connected to the plurality of charging contacts respectively, and at least one of the charging cables is provided with the aforementioned relay, and each pair of high-voltage lead-out structures of the relay is connected in series to the corresponding charging cable.

[0043] As the fifth aspect of the present invention, a transport vehicle is provided, which includes a vehicle body, a battery holder and the charging device mentioned above, wherein the charging contacts of the battery holder and the charging device are both arranged on the vehicle body, and the battery holder is electrically connected to the multiple charging contacts through multiple charging lines of the charging device.

[0044] In the protective cover, anti-touch finger assembly, relay, charging device and transport cart provided by the utility model, a limiting structure for surrounding the high-voltage lead-out terminal is also provided on one side of the protective cover. The limiting structure has multiple outlets distributed along the circumferential direction, so that the charging cables connected to different high-voltage lead-out terminals can be respectively led out from different outlets. The limiting structure is used to keep the charging cables connected to the relay separated from each other, thereby avoiding contact between the terminals of the charging cables, preventing the charging cables from accidentally being turned on and causing the connected battery to short-circuit or causing objects around the transport cart to be charged, thereby ensuring the safety of the transport cart. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The present invention will be further described below with reference to the accompanying drawings:

[0046] Figure 1 This is a schematic structural diagram of a protective cover provided by an embodiment of the present utility model;

[0047] Figure 2 This is a schematic cross-sectional view of the protective cover provided by an embodiment of the present utility model;

[0048] Figure 3 This is a schematic structural diagram of an anti-touch finger assembly provided by an embodiment of the present utility model;

[0049] Figure 4 This is a schematic structural diagram of the anti-touch finger assembly provided by an embodiment of the present utility model in a disassembled state;

[0050] Figure 51 is a schematic cross-sectional view of an anti-touch finger assembly provided by an embodiment of the present invention along one direction;

[0051] Figure 6 1 is a schematic cross-sectional view of the anti-touch finger assembly provided by an embodiment of the present invention in a disassembled state along one direction;

[0052] Figure 7 is a schematic cross-sectional view of the anti-touch finger assembly provided by an embodiment of the present utility model along another direction;

[0053] Figure 8 is a schematic cross-sectional view of the anti-touch finger assembly provided by an embodiment of the present invention in a disassembled state along another direction;

[0054] Figure 9 This is a schematic structural diagram of a protective cover in an anti-touch finger assembly provided by an embodiment of the present utility model;

[0055] Figure 10 yes Figure 9 A partial enlarged schematic diagram of the middle protective cover in area A;

[0056] Figure 11 This is a schematic structural diagram of a relay provided by an embodiment of the present utility model;

[0057] Figure 12 yes Figure 11 A partial enlarged schematic diagram of the relay in area B.

[0058] Description of reference numerals:

[0059] 100. Protective cover; 110. Upper cover; 111. First exhaust hole; 112. Second exhaust hole; 120. Upper mounting portion; 121. Mounting sleeve; 122. Clamping block; 123. Partition slot; 124. Second fixing portion; 125. Third fixing portion; 126. Second hollow groove; 127. Air extraction avoidance hole; 130. Limiting structure; 131. Wire outlet; 140. Reinforcement ring; 200. Fixing seat; 210. Connecting portion; 211. Connecting ring; 212. Wiring positioning ring; 213. Wire outlet avoidance structure; 220. Lower mounting portion; 221. Partition plate; 222. Connecting tube; 223. First fixing portion; 224. First hollow groove; 225. Fourth fixing portion; 10. Relay housing; 20. High-voltage lead-out structure. DETAILED DESCRIPTION

[0060] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described in the embodiments are intended to explain the present invention and are not to be construed as limiting the present invention.

[0061] References in this specification to "one embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with the embodiment itself can be included in at least one embodiment disclosed herein. The appearance of the phrase "in one embodiment" in various places in the specification does not necessarily refer to the same embodiment.

[0062] In the existing relay solution, the high-voltage lead-out terminal of the relay is tightly connected to the circular cold-pressed terminal (OT terminal) of the wiring harness. The circumferential position of the circular cold-pressed terminal can be flexibly rotated, resulting in the risk of mutual contact between the wiring harness terminals connected to different high-voltage lead-out terminals. Especially when the unmanned guided vehicle is bumped or collides, the probability of short circuit between the wiring harness terminals will also increase, which will cause the charging cable to be accidentally connected during non-charging time, affecting the safety of the unmanned guided vehicle.

[0063] In order to solve the above technical problems, as one aspect of the present invention, a protective cover 100 is provided. Figure 1 、 Figure 2 、 Figure 9 As shown, it includes an upper cover 110 and an upper mounting portion 120. The upper mounting portion 120 is connected to one side of the upper cover 110 and is used to connect to the relay housing. The protective cover 100 also includes a limiting structure 130 surrounding the upper mounting portion 120. The limiting structure 130 has a plurality of wire outlets 131 distributed along the circumferential direction.

[0064] It can be understood that in the relay structure, the top of the relay housing 10 has an opening, and the high-voltage lead-out terminal extends from the opening. The upper mounting portion 120 of the protective cover 100 provided by the utility model is used to be installed on the top of the relay housing 10, so as to be covered on the high-voltage lead-out terminal through the upper cover 110 made of insulating material. The upper cover 110 prevents the operator's fingers from accidentally touching the high-voltage lead-out terminal and the charging cable terminal connected to it, thereby realizing the anti-finger touch function.

[0065] In the protective cover 100 provided by the present invention, a limiting structure 130 for surrounding the high-voltage lead-out terminal is further provided on one side of the protective cover 100. The limiting structure 130 has a plurality of wire outlets 131 distributed along the circumferential direction, so that the charging cables connected to different high-voltage lead-out terminals can be respectively led out from different wire outlets 131. The limiting structure 130 is used to keep the charging cables connected to the relays separated from each other, thereby avoiding contact between the terminals of the charging cables, preventing the charging cables from accidentally being turned on and short-circuiting the connected battery or charging objects around the transport truck, thereby ensuring the safety of the transport truck.

[0066] In some embodiments of the present invention, the wire outlet 131 can be an open structure formed on the limiting structure 130, and the charging cable can be led out through the wire outlet 131, or the wire outlet 131 can be an opening with a fixing function, and after the charging cable is connected, the wire outlet 131 at the corresponding position can be closed and the charging cable can be clamped.

[0067] In order to facilitate the adjustment of the size of the outlet 131, as a preferred embodiment of the present invention, Figures 1 to 9 As shown, the limiting structure 130 includes a plurality of wire-management teeth, one end of which is fixedly connected to the upper cover 110 and the other end of which extends away from the upper cover 110 , and a wire outlet 131 is formed between adjacent wire-management teeth.

[0068] The embodiment of the present invention adopts multiple limiting structures 130 extending along the disassembly and assembly direction of the protective cover 100 to separate and form multiple outlets 131. Therefore, when the diameter of the charging cable is large (exceeding the width of the outlet 131), the outlets 131 between adjacent limiting structures 130 can be enlarged by removing some of the limiting structures 130, thereby adapting to charging cables with different diameters and improving the adaptability of the relay to cables of different specifications.

[0069] In order to facilitate observation of the connection status of the charging cable, as a preferred embodiment of the present invention, the protective cover 100 is made of a transparent material so that the operator can observe the position of the high-voltage lead-out terminal from the outside.

[0070] Preferably, the hardness of the protective cover 100 is relatively low, so that when the width of the wire outlet 131 is adjusted, the redundant limiting structure 130 can be removed by trimming, bending, pulling out, etc.

[0071] For example, as an optional embodiment of the present invention, the material of the protective cover 100 can be polypropylene (PP).

[0072] As a second aspect of the present invention, an anti-touch finger assembly is provided, such as Figures 3 to 8 As shown, the anti-touch finger assembly includes a protective cover 100 and a fixing base 200 provided by the present invention. The fixing base 200 is used to be sealed and connected to the opening of the relay housing 10 . The upper mounting portion 120 of the protective cover 100 is fixedly connected to the fixing base 200 .

[0073] It can be understood that in the relay structure, the connecting part 210 seals the top opening of the relay housing 10, and the top end of the high-voltage lead-out terminal passes through the connecting part 210 and is located between the upper cover 110 and the connecting part 210, thereby preventing the operator's fingers from accidentally touching the high-voltage lead-out terminal and the charging cable terminal connected to it through the upper cover 110, thereby realizing the anti-finger touch function.

[0074] In the anti-touch finger assembly provided by the present invention, a limiting structure 130 for surrounding the high-voltage lead-out terminal is further provided on one side of the protective cover 100. The limiting structure 130 has a plurality of wire outlets 131 distributed along the circumferential direction, so that the charging cables connected to different high-voltage lead-out terminals can be respectively led out from different wire outlets 131. The limiting structure 130 is used to keep the charging cables connected to the relays separated from each other, thereby avoiding contact between the terminals of the charging cables, preventing the charging cables from accidentally being turned on and causing the connected battery to short-circuit or causing objects around the transport truck to be charged, thereby ensuring the safety of the transport truck.

[0075] In order to facilitate the disassembly and assembly of the charging cable, as a preferred embodiment of the present invention, Figures 3 to 8 As shown, the fixing base 200 includes a connecting portion 210 and a lower mounting portion 220 that are connected to each other. The connecting portion 210 is used to be sealed and connected to the opening of the relay housing 10. The upper cover 110 and the connecting portion 210 are arranged opposite to each other. The upper mounting portion 120 and the lower mounting portion 220 are located between the upper cover 110 and the connecting portion 210, and the upper mounting portion 120 and the lower mounting portion 220 are detachably connected to each other. The limiting structure 130 is fixedly connected to the upper cover 110.

[0076] In an embodiment of the present invention, the upper mounting portion 120 of the protective cover 100 is detachably connected to the lower mounting portion 220 of the fixing base 200, so that the operator can conveniently remove the protective cover 100 from the fixing base 200 when connecting the charging cable, and put the protective cover 100 back on the fixing base 200 after connecting the charging cable. The protective cover 100 covers the terminal of the charging cable to prevent accidental touch, thereby improving the convenience of disassembling and assembling the charging cable.

[0077] In order to further ensure the safety of the transport vehicle, as a preferred embodiment of the present invention, Figure 4 、 Figure 8 As shown, the connecting portion 210 includes a pair of outgoing line avoidance structures 213 (i.e., an opening for setting a high-voltage lead-out terminal), the lower mounting portion 220 includes a partition plate 221, the outgoing line avoidance structures 213 are distributed on both sides of the partition plate 221, and a partition slot 123 is formed in the upper mounting portion 120, and the partition plate 221 is accommodated in the partition slot 123.

[0078] In an embodiment of the present utility model, the lower mounting portion 220 includes a partition plate 221, which is used to set the line avoidance structure 213 of the high-voltage lead-out terminal, and is respectively arranged on both sides of the partition plate 221, so that the high-voltage lead-out terminals on both sides and the charging cables connected thereto and the terminals of the charging cables are separated by the insulating partition plate 221, thereby further improving the insulation effect between the charging cables and ensuring the safety of the transport vehicle.

[0079] It can be understood that the relay usually includes two high-voltage lead-out terminals. When charging, the electromagnetic switch inside the relay is energized under the control of the transporter control device to connect the two high-voltage lead-out terminals, thereby connecting the charging line. In the non-charging state, the electromagnetic switch is disconnected and the charging line is also disconnected accordingly.

[0080] As an optional embodiment of the present invention, Figure 4 As shown, the connecting portion 210 includes a connecting ring 211 and a wiring positioning ring 212 arranged in pairs. The connecting ring 211 is used to connect to the opening of the relay housing 10. The wiring positioning ring 212 is connected between the two sides of the partition plate 221 and the inner side of the connecting ring 211. The outgoing line avoidance structure 213 is a hole in the wiring positioning ring 212.

[0081] It is understood that the edge shape of the connecting ring 211 corresponds to the opening shape of the relay housing 10, for example, Figure 4 、 Figure 11 As shown, in the embodiment of the present invention, the opening shape of the relay housing 10 is circular, and the outer edge shape of the connecting ring 211 is also correspondingly arc-shaped.

[0082] In order to ensure the stability of the connection between the protective cover 100 and the fixing base 200, as a preferred embodiment of the present invention, Figures 4 to 6 As shown, the partition plate 221 has a first fixing portion 223, and the side wall of the partition plate slot 123 has a second fixing portion 124. The first fixing portion 223 and the second fixing portion 124 can be connected to each other when the partition plate 221 enters the partition plate slot 123 to fix the partition plate 221 in the partition plate slot 123.

[0083] In an embodiment of the present utility model, a first fixing portion 223 and a second fixing portion 124 are respectively provided on the partition plate 221 and the partition slot 123. The first fixing portion 223 and the second fixing portion 124 can be connected to each other when the protective cover 100 and the fixing base 200 are plugged in, thereby ensuring the stability of the connection between the protective cover 100 and the fixing base 200, and further ensuring the stability of the insulation effect of the protective cover 100.

[0084] As an optional embodiment of the present invention, Figures 4 to 6 As shown, the first fixing portion 223 protrudes toward the side away from the partition plate 221 , and the second fixing portion 124 protrudes toward the inside of the partition plate slot 123 . The first fixing portion 223 and the second fixing portion 124 can be buckled together when the partition plate 221 enters the partition plate slot 123 .

[0085] In other embodiments of the present invention, the first fixing portion 223 and the second fixing portion 124 may also have other forms of snap-fitting relationships. For example, one of the first fixing portion 223 and the second fixing portion 124 may be a protruding structure and the other a recessed structure. Alternatively, the first fixing portion 223 and the second fixing portion 124 may be connected by other means such as adhesive bonding or adsorption. That is, the first fixing portion 223 and the second fixing portion 124 may be bonded or magnetically connected when the partition plate 221 enters the partition plate slot 123.

[0086] As an optional embodiment of the present invention, Figures 4 to 6 As shown, the partition plate 221 has a first hollow groove 224 that passes through the partition plate 221 in the thickness direction and extends toward the connecting portion 210 , and the first fixing portion 223 is located on the side of the partition plate 221 away from the first hollow groove 224 .

[0087] In an embodiment of the present invention, the partition plate 221 is provided with a first hollow groove 224 on the back side of the first fixing portion 223, so that the portion where the partition plate 221 is connected to the first fixing portion 223 can be deformed toward the side of the first hollow groove 224, thereby increasing the margin of movement when the first fixing portion 223 enters the partition slot 123 and engages with the second fixing portion 124, thereby ensuring the smoothness of the mutual insertion action of the protective cover 100 and the fixing seat 200.

[0088] As an optional embodiment of the present invention, Figures 4 to 6 、 Figure 12 As shown, the lower mounting portion 220 further includes a connecting cylinder 222, which is located on a side of the partition plate 221 away from the first fixing portion 223, and is used to selectively connect the inner cavity of the relay housing 10 with the outside;

[0089] The upper mounting portion 120 includes a mounting sleeve 121 and a clamping block 122. The mounting sleeve 121 is connected between the upper cover 110 and the clamping block 122. A partition slot 123 is formed in the mounting sleeve 121. The clamping block 122 is located on a side of the partition slot 123 away from the first fixing portion 223.

[0090] The clamping block 122 has a third fixing portion 125 , and the connecting tube 222 has a fourth fixing portion 225 on a side facing away from the partition plate 221 . The third fixing portion 125 and the fourth fixing portion 225 can be connected to each other when the partition plate 221 enters the partition slot 123 .

[0091] It can be understood that the connecting cylinder 222 is used to realize the extraction and inflation of air inside the relay. Specifically, in the relay structure, an exhaust valve can be provided inside the connecting cylinder 222. When leaving the factory, the air inside the relay housing 10 can be extracted through the exhaust valve, and protective gas (such as nitrogen, hydrogen, etc.) can be injected into the relay housing 10 through the exhaust valve to ensure the sensitivity of the electromagnetic switch.

[0092] In an embodiment of the present utility model, the upper mounting portion 120 includes a clamping block 122, the clamping block 122 has a third fixing portion 125, and the connecting tube 222 has a fourth fixing portion 225. The third fixing portion 125 and the fourth fixing portion 225 can be connected to each other when the partition plate 221 enters the partition slot 123, so that the first fixing portion 223 and the second fixing portion 124 and the third fixing portion 125 and the fourth fixing portion 225 are respectively used to detachably fix the two sides of the upper mounting portion 120 and the lower mounting portion 220 to ensure the stability of the connection between the protective cover 100 and the fixing base 200.

[0093] As an optional embodiment of the present invention, Figures 4 to 6 、 Figure 12 As shown, the third fixing portion 125 protrudes toward one side of the second fixing portion 124, and the fourth fixing portion 225 is a groove formed on the side wall of the connecting tube 222. The third fixing portion 125 can be buckled into the fourth fixing portion 225 when the partition plate 221 enters the partition slot 123.

[0094] As an optional embodiment of the present invention, Figures 4 to 6 As shown, the fourth fixing portion 225 penetrates the side wall of the connecting tube 222 along the thickness direction of the side wall of the connecting tube 222 .

[0095] In other embodiments of the present invention, the first fixing portion 223 and the second fixing portion 124 may also be connected in other ways, for example, the third fixing portion 125 and the fourth fixing portion 225 may both be raised structures. Alternatively, the first fixing portion 223 and the second fixing portion 124 may be connected by other means such as adhesive bonding or adsorption. That is, the third fixing portion 125 and the fourth fixing portion 225 may be bonded or magnetically connected when the partition plate 221 enters the partition plate slot 123.

[0096] As an optional embodiment of the present invention, Figure 6 、 Figure 9 、 Figure 10 As shown, the clamping block 122 has a second hollow groove 126 that passes through the thickness direction of the partition plate 221 and extends toward the upper cover 110 . The second hollow groove 126 is located on a side of the third fixing portion 125 away from the partition slot 123 .

[0097] In an embodiment of the present utility model, the snap-in block 122 is provided with a second hollow groove 126 on the back side of the third fixing portion 125, so that the portion where the snap-in block 122 is connected to the third fixing portion 125 can be deformed toward the side of the second hollow groove 126, thereby increasing the margin of movement when the third fixing portion 125 and the fourth fixing portion 225 are fastened together, thereby ensuring the smoothness of the mutual insertion action of the protective cover 100 and the fixing seat 200.

[0098] As an optional embodiment of the present invention, Figures 4 to 6 、 Figure 9 、 Figure 10 As shown, an air extraction avoidance hole 127 is also formed in the mounting sleeve 121. The position of the air extraction avoidance hole 127 corresponds to the position of the connecting tube 222 and is interconnected. The air extraction avoidance hole 127 can accommodate the top end of the air extraction valve.

[0099] As an optional embodiment of the present invention, Figure 5 、 Figure 6 、 Figure 9 、 Figure 10 As shown, the air extraction avoidance hole 127 is communicated with the partition slot 123.

[0100] As an optional embodiment of the present invention, Figure 4 As shown, the cross-section of the connecting cylinder 222 is rectangular.

[0101] As an optional embodiment of the present invention, Figure 5 、 Figure 6 、 Figure 9 、 Figure 10 As shown, the cross-sectional shape of the air extraction avoidance hole 127 corresponds to the cross-sectional shape of the connecting tube 222 .

[0102] As an optional embodiment of the present invention, Figure 4 As shown, the connecting tube 222 is connected between the partition plate 221 and the connecting ring 211 .

[0103] As a preferred embodiment of the present invention, Figure 4 、 Figure 5 、 Figure 6 As shown, the upper cover 110 has at least one first exhaust hole 111 that penetrates the upper cover 110 along the thickness direction. The first exhaust hole 111 is connected to the partition slot 123, so that when the partition plate 221 is inserted into the partition slot 123, the air in the partition slot 123 can be discharged outward through the first exhaust hole 111, thereby reducing air resistance and ensuring the smoothness of the insertion of the partition plate 221 into the partition slot 123.

[0104] In order to further reduce the air resistance, as an optional embodiment of the present invention, Figure 4 、 Figure 5 、 Figure 6 As shown, the upper cover 110 further has at least one second exhaust hole 112 penetrating the upper cover 110 along the thickness direction, and the second exhaust hole 112 is connected to the air extraction avoidance hole 127 .

[0105] In order to improve the overall structural strength of the protective cover 100, as a preferred embodiment of the present invention, Figure 4 、 Figure 7 、 Figure 8 As shown, the protective cover 100 further includes a reinforcement ring 140 , which is connected to a side of the upper cover 110 facing the connection portion 210 , and the limiting structure 130 is fixedly connected to the connection portion 210 via the reinforcement ring 140 .

[0106] In order to further improve the overall structural strength of the protective cover 100, as a preferred embodiment of the present invention, Figure 9 As shown, both sides of the upper mounting portion 120 along the radial direction of the upper cover 110 are connected to the reinforcement ring 140 .

[0107] As an optional implementation of the present invention, the cross-sectional shape of the wire management teeth is a rectangle, a rounded rectangle, or a chamfered rectangle.

[0108] As an optional embodiment of the present invention, Figure 3 、 Figure 4 、 Figure 9 As shown, the cross-sectional size of the wire management teeth gradually decreases along the side close to the connecting portion 210 .

[0109] As a third aspect of the present invention, a relay is provided, such as Figure 11 As shown, the relay includes a relay housing 10, an electromagnetic switch, a paired high-current lead-out structure 20 (i.e., the high-current lead-out end of the relay) and an anti-touch finger assembly provided by the present invention. The electromagnetic switch is arranged in the relay housing 10, and the fixing seat 200 of the anti-touch finger assembly is sealed with the opening of the relay housing 10. One end of the high-current lead-out structure 20 is located between the upper cover 110 and the connecting part 210. A plurality of outlets 131 surround the high-current lead-out structure 20. The other end of the high-current lead-out structure 20 passes through the fixing seat 200 and is connected to the electromagnetic switch. The electromagnetic switch can selectively turn on the high-current lead-out structure 20.

[0110] In the relay provided by the present invention, the protective cover 100 has a limiting structure 130 surrounding the high-voltage lead-out terminal. The limiting structure 130 has a plurality of wire outlets 131 distributed along the circumferential direction, so that the charging cables connected to different high-voltage lead-out terminals can be respectively led out from different wire outlets 131. The limiting structure 130 is used to keep the charging cables connected to the relay separated from each other, thereby avoiding contact between the terminals of the charging cables, preventing the charging cables from accidentally being turned on and short-circuiting the connected battery or charging objects around the transport truck, thereby ensuring the safety of the transport truck.

[0111] As an optional embodiment of the present invention, Figure 4 、 Figure 8 As shown, the connection portion 210 includes a pair of outgoing line avoidance structures 213 , and the strong current lead-out structure 20 passes through the outgoing line avoidance structures 213 and is connected to the electromagnetic switch.

[0112] As an optional embodiment of the present invention, the high-voltage lead-out structure 20 includes a connecting column and a fixing nut sleeved on the connecting column. The connecting column has a contact step surface facing the upper cover 110. The fixing nut is sleeved on the connecting column and cooperates with the connecting column thread. The fixing nut can rotate around the connecting column and move toward the contact step surface to tighten the terminal of the charging cable (i.e., the OT terminal sleeved on the connecting column) between the fixing nut and the contact step surface, thereby ensuring the stability of the electrical connection between the terminal of the charging cable and the electromagnetic switch through the high-voltage lead-out structure 20.

[0113] As an optional embodiment of the present invention, the relay further includes an exhaust valve (obscured and not shown in the figure), and the lower mounting portion 220 further includes a connecting tube 222 , through which the exhaust valve passes and communicates with the inner cavity of the relay housing 10 .

[0114] As the fourth aspect of the present invention, a charging device for a transport vehicle is provided, comprising a plurality of charging contacts and a plurality of charging cables, wherein the plurality of charging cables are electrically connected to the plurality of charging contacts respectively, and at least one charging cable is provided with a relay provided in an embodiment of the present invention, and each pair of high-voltage lead-out structures 20 of the relay is connected in series to the corresponding charging cable.

[0115] In the charging device provided by the present invention, the protective cover 100 of the relay has a limiting structure 130 surrounding the high-voltage lead-out terminal. The limiting structure 130 has a plurality of wire outlets 131 distributed along the circumferential direction, so that the charging cables connected to different high-voltage lead-out terminals can be respectively led out from different wire outlets 131. The limiting structure 130 is used to keep the charging cables connected to the relay separated from each other, thereby avoiding contact between the terminals of the charging cables, preventing the charging cables from accidentally being turned on and short-circuiting the connected battery or charging objects around the transport truck, thereby ensuring the safety of the transport truck.

[0116] As the fifth aspect of the present invention, a transport vehicle is provided, comprising a vehicle body, a battery holder and a charging device provided by the present invention, wherein the charging contacts of the battery holder and the charging device are both arranged on the vehicle body, and the battery holder is electrically connected to the multiple charging contacts through multiple charging lines of the charging device.

[0117] In the transport vehicle provided by the present invention, the protective cover 100 of the relay in the charging device has a limiting structure 130 surrounding the high-voltage lead-out terminal. The limiting structure 130 has multiple outlets 131 distributed along the circumferential direction, so that the charging lines connected to different high-voltage lead-out terminals can be respectively led out from different outlets 131. The limiting structure 130 is used to keep the charging lines connected to the relays separated from each other, thereby avoiding contact between the terminals of the charging lines, preventing the charging lines from accidentally turning on and short-circuiting the connected battery or charging objects around the transport vehicle, thereby ensuring the safety of the transport vehicle.

[0118] Optionally, the transport vehicle provided by the present invention may be an automatic guided vehicle (AGV).

[0119] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modifications that do not deviate from the functional and structural principles of the present invention are included within the scope of the claims.

Claims

1. A protective cover (100), comprising an upper cover (110) and an upper mounting portion (120), wherein the upper mounting portion (120) is connected to one side of the upper cover (110) and is used to connect to a relay housing, characterized in that: The protective cover (100) further comprises a limiting structure (130) surrounding the upper mounting portion (120), wherein the limiting structure (130) has a plurality of wire outlets (131) distributed along the circumferential direction.

2. The protective cover (100) according to claim 1, characterized in that The limiting structure (130) comprises a plurality of wire-managing teeth, one end of each of the wire-managing teeth being fixedly connected to the upper cover (110), and the other end extending along a side away from the upper cover (110), with the wire outlet (131) formed between adjacent wire-managing teeth.

3. The protective cover (100) according to claim 1 or 2, characterized in that: The protective cover (100) is made of transparent material.

4. An anti-touch finger assembly, characterized in that: The anti-touch finger assembly comprises a fixing seat (200) and a protective cover (100) according to any one of claims 1 to 3, wherein the fixing seat (200) is used for sealingly connecting with the opening of the relay housing (10), and the upper mounting portion (120) of the protective cover (100) is fixedly connected to the fixing seat (200).

5. The anti-touch finger assembly according to claim 4, characterized in that: The fixing seat (200) comprises a connecting portion (210) and a lower mounting portion (220) connected to each other, the connecting portion (210) being used for sealingly connecting to the opening of the relay housing (10), the upper cover (110) and the connecting portion (210) being arranged opposite to each other, the upper mounting portion (120) and the lower mounting portion (220) being located between the upper cover (110) and the connecting portion (210), and the upper mounting portion (120) and the lower mounting portion (220) being detachably connected to each other.

6. The anti-touch finger assembly according to claim 5, characterized in that: The connecting portion (210) includes a pair of outgoing wire avoidance structures (213); the lower mounting portion (220) includes a partition plate (221); the outgoing wire avoidance structures (213) are distributed on both sides of the partition plate (221); a partition plate slot (123) is formed in the upper mounting portion (120); and the partition plate (221) is accommodated in the partition plate slot (123).

7. The anti-touch finger assembly according to claim 6, characterized in that: The partition plate (221) has a first fixing portion (223), and the side wall of the partition plate slot (123) has a second fixing portion (124). The first fixing portion (223) and the second fixing portion (124) can be connected to each other when the partition plate (221) enters the partition plate slot (123), so as to fix the partition plate (221) in the partition plate slot (123).

8. The anti-touch finger assembly according to claim 7, characterized in that: The lower mounting portion (220) further includes a connecting tube (222), the connecting tube (222) being located on a side of the partition plate (221) away from the first fixing portion (223), the connecting tube (222) being used to selectively connect the inner cavity of the relay housing (10) with the outside; The upper mounting portion (120) comprises a mounting sleeve (121) and a clamping block (122); the mounting sleeve (121) is connected between the upper cover (110) and the clamping block (122); the partition slot (123) is formed in the mounting sleeve (121); and the clamping block (122) is located on a side of the partition slot (123) away from the first fixing portion (223); The clamping block (122) has a third fixing portion (125), and the connecting tube (222) has a fourth fixing portion (225) on a side facing away from the partition plate (221). The third fixing portion (125) and the fourth fixing portion (225) can be connected to each other when the partition plate (221) enters the partition plate slot (123).

9. A relay, characterized in that: The relay comprises a relay housing (10), an electromagnetic switch, a pair of high-voltage lead-out structures (20) and an anti-touch finger assembly according to any one of claims 4 to 8, wherein the electromagnetic switch is arranged in the relay housing (10), the fixing seat (200) of the anti-touch finger assembly is sealedly connected to the opening of the relay housing (10), one end of the high-voltage lead-out structure (20) is located between the fixing seat (200) and the protective cover (100), a plurality of outlets (131) surround the high-voltage lead-out structure (20), the other end of the high-voltage lead-out structure (20) passes through the fixing seat (200) and is connected to the electromagnetic switch, and the electromagnetic switch can selectively turn on the high-voltage lead-out structure (20).

10. A charging device comprising a plurality of charging contacts and a plurality of charging cables, wherein the plurality of charging cables are electrically connected to the plurality of charging contacts, respectively, At least one of the charging lines is provided with the relay according to claim 9, and each pair of high-voltage lead-out structures (20) of the relay is connected in series to the corresponding charging line.

11. A transport vehicle, characterized in that: The transport vehicle includes a vehicle body, a battery holder and the charging device according to claim 10, wherein the battery holder and the charging contacts of the charging device are both arranged on the vehicle body, and the battery holder is electrically connected to the plurality of charging contacts through a plurality of charging lines of the charging device.

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