A grounding structure and elastic wheel

Abstract

The embodiments of the present invention provide a grounding structure and an elastic wheel, and relate to the technical field of rail vehicle components. The grounding structure provided by the embodiments of the present invention has a first connecting end and a second connecting end relative to each other, the first connecting end is used for conductive connection with the wheel hoop, and the second connecting end is used for conductive connection with the wheel center. The first connecting end can be connected to the wheel hoop by screw connection, integral molding or bonding. When the first connecting end is connected to the wheel hoop by screw, the grounding structure also includes a first mounting screw, the first connecting end is provided with a first mounting hole, the first mounting screw passes through the first mounting hole and is screwed to the wheel hoop, thereby fixing the first connecting end to the wheel hoop. The first mounting hole is a countersunk hole, thereby effectively saving installation space, so that when the grounding structure is applied to an elastic wheel with a narrower tread width, the wheel hoop has sufficient installation space to avoid the problem of the grounding structure being scraped off and thus affecting the grounding return current.

Description

Technical Field

[0001] The present invention relates to the technical field of rail vehicle components, and in particular to a ground contact structure and an elastic wheel. Background Art

[0002] As urban traffic problems become increasingly prominent, urban rail vehicles have become an important choice for urban transportation due to their economic, environmental, convenient and comfortable advantages. Elastic wheels are made by embedding vibration-damping rubber between the wheel rim and the wheel center. Relying on the vibration-damping effect of the rubber, they can reduce the wheel-rail impact noise, ease the wheel-rail impact vibration and improve the riding comfort of passengers.

[0003] The existing elastic wheel is generally composed of a wheel hoop, a wheel center, a pressure ring, a vibration-damping rubber block and a connecting wire. The wheel center and the pressure ring are interference-fitted to evenly distribute the vibration-damping rubber block in the metal cavity formed by the wheel hoop, the wheel center and the pressure ring. One end of the connecting wire is fixed on the wheel hoop, and the other end is fixed on the pressure ring. The current of the wheel center is led to the wheel hoop through the interference contact between the pressure ring and the wheel center, and finally a grounding loop is formed. However, when using this grounding method, when facing an elastic wheel with a relatively compact structure, especially an elastic wheel with a narrow tread width, the connecting wire is very easy to be scraped off, thereby affecting the grounding return current. Summary of the invention

[0004] The objects of the present invention include, for example, providing a grounding structure which can save installation area, is suitable for wheel hoops with narrower tread widths, and ensures a grounding return effect.

[0005] The purpose of the present invention also includes providing an elastic wheel which can save installation area, is suitable for wheel hoops with narrower tread width, and ensures ground return effect.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] An embodiment of the present invention provides a grounding structure for an elastic wheel, the elastic wheel comprising a wheel hoop, a wheel center and a pressure ring, the pressure ring being arranged between the wheel center and the wheel hoop, the grounding structure having a first connecting end and a second connecting end opposite to each other; the first connecting end is used for conductive connection with the wheel hoop, and the second connecting end is used for conductive connection with the wheel center;

[0008] The grounding structure further includes a first mounting screw; the first connection end is provided with a first mounting hole, the first mounting screw passes through the first mounting hole and is used to be screwed with the wheel hoop so that the first connection end is fixed to the wheel hoop; the first mounting hole is a countersunk hole, and the screw head of the first mounting screw is accommodated in the first mounting hole; or,

[0009] The first connecting end is integrally formed with the wheel hoop or the first connecting end is bonded to the wheel hoop.

[0010] Optionally, the grounding structure includes an interconnected connector and a connecting wire, the connector is used to be conductively connected to the wheel hoop, and the connecting wire is used to be conductively connected to the wheel center; the first connecting end is an end of the connector used to be connected to the wheel hoop; the second connecting end is an end of the connecting wire used to be connected to the wheel center.

[0011] Optionally, the connecting member has a first end and a second end opposite to each other, the first end is used to be conductively connected to the wheel hoop, the second end extends over the pressure ring to the wheel center, and the second end is conductively connected to the connecting wire.

[0012] Optionally, the first mounting hole is opened at the first end, the number of the first mounting holes is two, the two first mounting holes are arranged at intervals along the first direction, and the line connecting the first end and the second end extends along the second direction; the first direction and the second direction form an angle α, 0°<α≤90°.

[0013] Optionally, the grounding structure further includes a second mounting screw, and the second mounting screw is used to cooperate with the connecting member and the connecting wire at the same time to connect the connecting member to the connecting wire.

[0014] Optionally, a groove for accommodating the second mounting screw is provided on the wheel center to avoid interference between the second mounting screw and the wheel center.

[0015] Optionally, the connecting member is rotatably connected to the connecting wire.

[0016] Optionally, the grounding structure includes a cable, a first cable terminal and a second cable terminal, the first cable terminal and the second cable terminal are respectively fixed at two ends of the cable; the first cable terminal is used for conductive connection with the wheel center; the second cable terminal is used for conductive connection with the wheel hoop.

[0017] Optionally, the first mounting hole is opened in the second cable terminal.

[0018] Optionally, the cable includes a copper core and a heat shrink tube sleeved on the copper core, the first cable terminal and the second cable terminal are respectively clamped at two ends of the copper core, and the two ends of the heat shrink tube are respectively sleeved on the first cable terminal and the second cable terminal.

[0019] Optionally, the grounding structure further includes a gasket, which is used to be arranged between the first cable terminal and the wheel center, and the gasket has an accommodating groove for accommodating the first cable terminal.

[0020] An embodiment of the present invention further provides an elastic wheel, which includes the above-mentioned grounding structure.

[0021] The beneficial effects of the ground contact structure and the elastic wheel of the embodiment of the present invention include, for example:

[0022] The grounding structure provided by the embodiment of the present invention is used for an elastic wheel, and the elastic wheel includes a wheel hoop, a wheel center and a pressure ring, and the pressure ring is arranged between the wheel center and the wheel hoop. The grounding structure has a first connecting end and a second connecting end relative to each other, the first connecting end is used for conductive connection with the wheel hoop, and the second connecting end is used for conductive connection with the wheel center. The first connecting end can be connected to the wheel hoop by screw connection, integral molding or bonding. When the first connecting end is connected to the wheel hoop by screw, the grounding structure also includes a first mounting screw, and the first connecting end is provided with a first mounting hole, and the first mounting screw passes through the first mounting hole and is screwed to the wheel hoop, thereby fixing the first connecting end to the wheel hoop. The first mounting hole is a countersunk hole, thereby effectively saving installation space, so that when the grounding structure is applied to an elastic wheel with a narrower tread width, the wheel hoop has sufficient installation space to avoid the problem of the grounding structure being scraped off and thus affecting the grounding return current.

[0023] The embodiment of the present invention further provides an elastic wheel, which includes the above-mentioned grounding structure. Since the elastic wheel includes the above-mentioned grounding structure, it also has the beneficial effect of small installation space, and when the elastic wheel has a narrow tread width, the wheel rim has sufficient installation space to avoid the grounding structure being scraped off and thus affecting the ground return current. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic diagram of the overall structure of an elastic wheel provided by an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the cross-sectional structure of a first mounting hole in a grounding structure provided by an embodiment of the present invention;

[0027] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure at III-III in the middle;

[0028] Figure 4 A schematic diagram of a grounding structure provided in an embodiment of the present invention;

[0029] Figure 5A schematic diagram of the structure of the connecting wire in the grounding structure provided by an embodiment of the present invention;

[0030] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure at VI-VI in the middle;

[0031] Figure 7 A schematic cross-sectional structure diagram of a gasket in a grounding structure provided in an embodiment of the present invention.

[0032] Icons: 10-elastic wheel; 100-body; 110-wheel center; 111-groove; 120-pressure ring; 130-shock-absorbing rubber; 140-wheel hoop; 141-accommodating space; 200-grounding structure; 210-connector; 211-first end; 212-first mounting hole; 213-second end; 214-second mounting hole; 220-connecting wire; 221-first cable terminal; 222-second cable terminal; 223-first connecting part; 224-third mounting hole; 225-second connecting part; 226-clamping cavity; 227-cable; 2271-copper core; 2272-heat shrink tube; 230-gasket; 231-accommodating groove; 241-first mounting screw; 242-second mounting screw; 243-nut; 244-third mounting screw. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0036] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0038] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0039] Figure 1 The overall structural diagram of the elastic wheel 10 provided in this embodiment is as follows: Figure 2 FIG. 2 is a schematic cross-sectional view of the first mounting hole 212 in the grounding structure 200 provided in this embodiment. Figure 3 for Figure 1 Please refer to the cross-sectional structure diagram at Ⅲ-Ⅲ in the figure. Figure 1 , Figure 2 and Figure 3 , this embodiment provides a grounding structure 200, and correspondingly, provides an elastic wheel 10.

[0040] The elastic wheel 10 includes the above-mentioned grounding structure 200, and the elastic wheel 10 also includes a body 100. The body 100 is a commonly used elastic wheel 10 structure in the prior art. Specifically, the body 100 includes a wheel hoop 140, a wheel center 110, a pressure ring 120, and a shock-absorbing rubber 130. The wheel hoop 140 is annular and is sleeved outside the wheel center 110. The shock-absorbing rubber 130 is arranged between the wheel center 110 and the wheel hoop 140, and the pressure ring 120 is crimped between one end of the outer side of the wheel center 110 and the shock-absorbing rubber 130. The wheel hoop 140 is conductively connected to the wheel center 110 through the grounding structure 200, so that the current of the wheel center 110 is grounded through the wheel hoop 140.

[0041] The grounding structure 200 has a first connection end and a second connection end opposite to each other, the first connection end is used for conductive connection with the wheel hoop 140, and the second connection end is used for conductive connection with the wheel center 110. The first connection end can be connected to the wheel hoop 140 by screw connection, integral molding or bonding. When the first connection end is connected to the wheel hoop by screw, the grounding structure 200 further includes a first mounting screw 241, the first connection end is provided with a first mounting hole 212, the first mounting screw 241 passes through the first mounting hole 212 and is screwed to the wheel hoop 140, thereby fixing the first connection end to the wheel hoop 140. The inventors have found that when a screw is used to connect the grounding structure 200 to an elastic wheel 10 with a narrow tread width, the screw head of the screw protrudes from the first connection end, resulting in a larger size of the first connection end, and a smaller space on the wheel rim 140 of the elastic wheel 10. The screw head protrudes from the end surface of the wheel rim 140, resulting in the grounding structure 200 being scraped off by other equipment and affecting the ground return. The grounding structure 200 of this embodiment effectively saves installation space by setting the first mounting hole 212 as a countersunk hole, so that when the grounding structure 200 is applied to an elastic wheel 10 with a narrow tread width, the wheel rim 140 has sufficient installation space to avoid the problem of the grounding structure 200 being scraped off and affecting the ground return.

[0042] The elastic wheel 10 provided in this embodiment is further described below:

[0043] Figure 4 This is a cross-sectional structural diagram of the grounding structure 200 provided in this embodiment. Figure 1 and Figure 4 In this embodiment, the grounding structure 200 includes a connector 210 and a connecting wire 220 that are interconnected. The connector 210 is used to be conductively connected to the wheel hoop 140, that is, the end of the connector 210 connected to the wheel hoop 140 is the first connecting end. The connecting conductor 220 is used to be conductively connected to the wheel center 110, that is, the first end of the connecting wire 220 connected to the wheel center 110 is the second connecting end. Specifically, the connector 210 includes a first end 211 and a second end 213 opposite to each other, the first end 211 is used to be connected to the wheel hoop 140, the second end 213 is conductively connected to the connecting wire 220, and the connecting wire 220 is used to be conductively connected to the wheel center 110, so that the current at the wheel center 110 is sequentially transmitted to the wheel hoop 140 through the connecting wire 220 and the connecting portion and grounded through the wheel hoop 140.

[0044] The connecting member 210 is a plate-shaped member, and its first end 211 is fixedly connected to the wheel hoop 140. Specifically, the grounding structure 200 also includes a first mounting screw 241, and the first end 211 is provided with a first mounting hole 212. The first mounting screw 241 passes through the first mounting hole 212 and is screwed with the wheel hoop 140, thereby fixing the connecting member 210 to the wheel hoop 140. The first mounting hole 212 is a countersunk hole, and the screw head of the first mounting screw 241 is accommodated in the first mounting hole 212, that is, in the case of Figure 3 In the cross-sectional view shown, the bolt head is blocked by the connector 210, which effectively saves installation space, thereby avoiding the problem of the first mounting screw 241 protruding from one side end surface of the connector 210 and interfering with other equipment on the bogie (not shown) and causing damage.

[0045] It should be noted that, in the present embodiment, the connector 210 is connected to the wheel hoop 140 via a first mounting screw 241. It is understandable that in other embodiments, the connector 210 and the wheel hoop 140 may be fixed in other ways as required, such as bonding, or the first end 211 may be integrally formed on the wheel hoop 140, that is, the connector 210 is fixed to the wheel hoop 140 by an integral molding method such as casting, so that the connector 210 serves as an extension of the wheel hoop 140 and is conductively connected to the connecting wire 220.

[0046] Furthermore, the number of the first mounting holes 212 is two, and the two first mounting holes 212 are arranged at intervals along the first direction A, and the line connecting the first end 211 and the second end 213 extends along the second direction B. The first direction and the second direction form an angle α, 0°<α≤90°, that is, the first direction and the second direction intersect. In this embodiment, the first direction is perpendicular to the second direction, that is, the angle α formed between the first direction and the second direction is 90°, thereby ensuring that during the rotation of the elastic wheel 10, the fixing reliability and installation stability of the first end 211 and the wheel hoop 140 are high, which helps to ensure the grounding effect. Optionally, in other embodiments, the angle between the first direction and the second direction can also be set to other values ​​such as 30°, 60°, 85°, etc.

[0047] Please refer to Figure 3The wheel rim 140 has a step portion, which includes a first end face, a connecting face, and a second end face connected in sequence. The first end face and the second end face are spaced apart along the axial direction of the wheel rim 140, so that a receiving space 141 for installing the first connecting end is formed between the plane where the first end face is located and the plane where the second end face is located. When the tread width of the elastic wheel 10 is narrow, the receiving space 141 is smaller, that is, the distance between the plane where the first end face is located and the plane where the second end face is located is closer. Specifically, the first end 211 of the connector 210 is disposed in the receiving space 141 to ensure that the plate-shaped connector 210 can smoothly pass over the pressure ring 120 and extend to the wheel center 110. By providing the connector 210 to achieve the overlap between the connecting wire 220 and the wheel rim 140, the installation space is saved. Therefore, when installed on the elastic wheel 10 with a narrow tread width, the accommodating space 141 of the wheel rim 140 is sufficient to accommodate the first connecting end of the grounding structure 200, so that the grounding structure 200 can adapt to the wheel rim 140 of the elastic wheel 10 with a narrow tread. Optionally, the connector 210 is made of wear-resistant material to reduce the damage to the connector 210 caused by the relative movement between the connector 210 and the pressure ring 120.

[0048] Furthermore, the second end 213 of the connector 210 extends beyond the pressure ring 120 to the wheel center 110, and is further connected to the connecting wire 220. The connection between the connecting wire 220 and the second end 213 is located at a position opposite to the wheel center 110, that is, in the axial direction, the connecting wire 220 and the pressure ring 120 do not overlap, even if the pressure ring 120 and the wheel hoop 140 move relative to each other in the axial direction, the connecting wire 220 has no contact with the pressure ring 120, thereby avoiding the problem of the pressure ring 120 wearing the connecting wire 220, which helps to extend the service life of the connecting wire 220 and ensure the grounding return effect.

[0049] Please continue to refer to Figure 3 In this embodiment, the grounding structure 200 further includes a second mounting screw 242, which is used to cooperate with the second end 213 and the connecting wire 220 at the same time, so as to connect the connector 210 with the connecting wire 220. Specifically, the grounding structure 200 further includes a nut 243, and the second end 213 is provided with a second mounting hole 214. The second mounting screw 242 passes through the second mounting hole 214 and the connecting wire 220 in sequence and is screwed with the nut 243, so that the second end 213 is connected with the connecting wire 220. The center of the second mounting hole 214 and the center of the two first mounting holes 212 form an isosceles triangle, that is, the distance between the second mounting hole 214 and the two first mounting holes 212 is equal.

[0050] Optionally, the second mounting hole 214 is a countersunk hole, and the bolt head of the second mounting screw 242 is accommodated in the second mounting hole 214, thereby avoiding the problem of the second mounting screw 242 protruding from the connecting member 210 and interfering with other equipment on the bogie (not shown) and causing damage.

[0051] Furthermore, the second end 213 is rotatably connected to the connecting wire 220, so that during the rotation of the elastic wheel 10, the connection between the second end 213 and the connecting conductive wire can adapt to the relative movement between the wheel center 110 and the wheel rim 140. Specifically, since the second end 213 and the connecting wire 220 are connected by the screw connection of the second mounting screw 242 and the nut 243, the second end 213 and the connecting wire 220 have a certain degree of freedom of relative rotation around the axis of the second mounting screw 242.

[0052] Furthermore, the wheel center 110 is provided with a groove 111 for accommodating the second mounting screw 242, so that the portion of the second mounting screw 242 that passes through the connecting wire 220 and the nut 243 are both accommodated in the groove 111, so as to avoid the second mounting screw 242 and the nut 243 from interfering with the wheel center 110, thereby preventing the wheel center 110, the second mounting screw 242 and the nut 243 from being damaged, which helps to ensure the reliability of the grounding structure 200. Specifically, the groove 111 is formed by a depression at a position of the wheel center 110 corresponding to the second mounting hole 214, and can accommodate the second mounting screw 242 and the nut 243, so as to ensure that during the movement of the elastic wheel 10, the second mounting screw 242 and the nut 243 do not interfere with the wheel center 110.

[0053] Figure 5 This is a schematic diagram of the structure of the connecting wire 220 in the grounding structure 200 provided in this embodiment. Figure 6 for Figure 5 The cross-sectional structure diagram at VI-VI in the middle. Please refer to Figure 5 and Figure 6 In this embodiment, the connecting wire 220 includes a cable 227 and two cable terminals disposed at both ends of the cable 227. The cable terminals are commonly used standard parts. The two cable terminals are respectively a first cable terminal 221 and a second cable terminal 222. The first cable terminal 221 is used for conductive connection with the wheel core 110, and the second cable terminal 222 is connected to the wheel hoop 140. Specifically, the second cable terminal 222 is connected to the second end 213, and thus connected to the wheel hoop 140 through the connecting member 210. Therefore, the current at the wheel core 110 is guided to the wheel hoop 140 through the first cable terminal 221, the cable 227, the second cable terminal 222 and the connecting member 210 in sequence, and is grounded through the wheel hoop 140.

[0054] Further, the cable 227 includes a copper core 2271 and a heat shrink tube 2272 sleeved on the copper core 2271, the first cable terminal 221 and the second cable terminal 222 are respectively clamped at both ends of the copper core 2271, and the first cable terminal 221 and the second cable terminal 222 are respectively sleeved at both ends of the heat shrink tube 2272. Specifically, the cable terminal includes a first connecting portion 223 and a second connecting portion 225 connected to each other, the first connecting portion 223 is sheet-shaped, and a third mounting hole 224 is opened thereon, and the second mounting screw 242 simultaneously passes through the second mounting hole 214 and the third mounting hole 224 of the second cable terminal 222 to connect the second end 213 with the second cable terminal 222. The second connecting portion 225 has a clamping cavity 226, and the clamping cavity 226 has an opening at one end away from the first connecting portion 223, and the end of the copper core 2271 is inserted into the clamping cavity 226 from the opening, so that the cable terminal clamps the copper core 2271. The heat shrink tube 2272 is sleeved on the copper core 2271, and the end of the heat shrink tube 2272 is located outside the second connecting part 225, that is, the part of the heat shrink tube 2272 corresponding to the copper core 2271 located in the clamping cavity 226 is located outside the second connecting part 225. In other words, the end of the second connecting part 225 away from the first connecting part 223 is located between the heat shrink tube 2272 and the copper core 2271.

[0055] Optionally, the copper core 2271 is a soft copper stranded wire, and the resistance value of the connecting wire 220 is ≦0.001Ω, thereby meeting the grounding requirement of the elastic wheel 10. It is understandable that in other embodiments, the structure of the copper core 2271 can also be specifically set according to requirements, such as a copper wire braided belt.

[0056] Furthermore, the grounding structure 200 further includes a third mounting screw 244 , which passes through the third mounting hole 224 of the first cable terminal 221 and is connected to the wheel core 110 , so that the connecting wire 220 is conductively connected to the wheel core 110 through the third mounting screw 244 .

[0057] It should be noted that, in the present embodiment, the grounding structure 200 includes a connector 210. By using the connector 210 as an extension of the wheel hoop 140, and the second end 213 of the connector 210 extends beyond the pressure ring 120 to the wheel center 110, the problem of the pressure ring 120 wearing the connecting wire 220 is avoided, which helps to extend the service life of the connecting wire 220 and ensure the grounding return effect. It can be understood that in other embodiments, the grounding structure 200 can also be set to include only the connecting wire 220 according to needs, and the first mounting hole 212 is directly opened on the second cable terminal 222, so that the first mounting screw 241 directly passes through the second cable terminal 222 and is connected to the wheel hoop 140 to connect the connecting wire 220 to the wheel hoop 140.

[0058] Figure 7This is a schematic cross-sectional view of the gasket 230 in the grounding structure 200 provided in this embodiment. Figure 1 , Figure 2 and Figure 6 Further, the grounding structure 200 further includes a gasket 230, which is arranged between the connecting wire 220 and the wheel core 110, and the third mounting screw 244 passes through the third mounting hole 224 of the first cable terminal 221 and the gasket 230 in sequence to connect with the wheel core 110. Specifically, the gasket 230 is arranged between the first cable terminal 221 and the wheel core 110. The gasket 230 has a receiving groove 231 for receiving the first cable terminal 221. When the first cable terminal 221 is installed in the receiving groove 231, the end of the first cable terminal 221 close to the wheel core 110 and both sides of the first cable terminal 221 are wrapped by the gasket 230, and the length of the gasket 230 extends to the heat shrink tube 2272, thereby ensuring that the first cable terminal 221 is electrically connected to the wheel core 110 only through the third mounting screw 244, thereby helping to ensure the grounding effect of the grounding structure 200.

[0059] Please refer to Figure 1 In this embodiment, the connecting wire 220 extends along the circumference of the wheel center 110, and the connecting member 210 extends along the radial direction of the wheel center 110, thereby helping the grounding structure 200 to adapt to the rotation of the elastic wheel 10. Specifically, the first cable terminal 221 and the second cable terminal 222 of the connecting wire 220 are connected clockwise (eg, Figure 1 Optionally, the number of the grounding structures 200 is two, and the two grounding structures 200 are symmetrically arranged about the dot center of the wheel center 110. It can be understood that in other embodiments, the number of the grounding structures 200 can also be specifically set according to requirements.

[0060] According to a grounding structure 200 provided in this embodiment, the working principle of the grounding structure 200 is as follows:

[0061] The connecting wire 220 of the grounding structure 200 is conductively connected to the wheel center 110 via the third mounting screw 244. At the same time, the other end of the connecting wire 220 is conductively connected to the second end 213 of the connecting member 210. The first end 211 of the connecting member 210 is fixed to the wheel hoop 140. Therefore, when in use, the current of the wheel center 110 is guided to the connecting wire 220 via the third mounting screw 244, and is guided to the wheel hoop 140 via the connecting wire 220 and the connecting member 210, and finally grounded via the wheel hoop 140.

[0062] The grounding structure 200 provided in this embodiment has at least the following advantages:

[0063] In the grounding structure 200 provided by the embodiment of the present invention, the connecting wire 220 is overlapped on the wheel rim 140 through the connecting member 210, and the connecting member 210 is provided with a first mounting hole 212 which is a countersunk hole, which greatly saves the installation space, so that the wheel rim 140 of the elastic wheel 10 with a narrow tread can be adapted. In addition, since the second end 213 of the connecting member 210 extends beyond the pressure ring 120 to the wheel center 110, that is, the connection point between the connecting wire 220 and the connecting member 210 corresponds to the wheel center 110, during the rotation of the elastic wheel 10, even if the pressure ring 120 and the wheel rim 140 produce axial relative movement, there is no contact between the pressure ring 120 and the connecting wire 220, thereby avoiding the risk of the pressure ring 120 wearing the connecting wire 220, improving the service life of the connecting wire 220, and further helping to extend the service life of the grounding structure 200. At the same time, the grounding structure 200 has high installation stability, avoiding the problem of the connecting wire 220 being scraped off by other equipment on the bogie, thereby ensuring the grounding effect.

[0064] This embodiment also provides an elastic wheel 10, which includes the above-mentioned grounding structure 200. Since the elastic wheel 10 includes the above-mentioned grounding structure 200, it also has the beneficial effects of long service life, good grounding effect and high installation stability.

[0065] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A grounding structure for an elastic wheel, the elastic wheel comprising a wheel rim, a wheel center and a pressure ring, the pressure ring being arranged between the wheel center and the wheel rim, characterized in that: The grounding structure has a first connecting end and a second connecting end opposite to each other; the first connecting end is used for conductive connection with the wheel hoop, and the second connecting end is used for conductive connection with the wheel center; The grounding structure further includes a first mounting screw; the first connection end is provided with a first mounting hole, the first mounting screw passes through the first mounting hole and is used to be screwed with the wheel hoop so that the first connection end is fixed to the wheel hoop; the first mounting hole is a countersunk hole, and the screw head of the first mounting screw is accommodated in the first mounting hole; or, The first connecting end is integrally formed with the wheel hoop or the first connecting end is bonded to the wheel hoop; The grounding structure includes a connecting member and a connecting wire connected to each other, the connecting member is used for conductive connection with the wheel hoop, and the connecting wire is used for conductive connection with the wheel center; The first connection end is an end of the connecting member used to connect to the wheel hoop; the second connection end is an end of the connecting wire used to connect to the wheel center; The connecting member has a first end and a second end opposite to each other, the first end is used for conductive connection with the wheel hoop, the second end extends beyond the pressure ring to the wheel center, and the second end is conductively connected with the connecting wire; The wheel hoop is provided with a step portion, which includes a first end face, a connecting face and a second end face connected in sequence, and the first end face and the second end face are arranged at intervals along the axial direction of the wheel hoop, so as to form an accommodation space for installing the first connecting end between the plane where the first end face is located and the plane where the second end face is located; the first end of the connecting piece is arranged in the accommodation space, so as to ensure that the plate-shaped connecting piece can smoothly pass over the pressure ring and extend to the wheel center; the connecting wire and the wheel hoop are overlapped by arranging the connecting piece; the accommodation space of the wheel hoop is sufficient to accommodate the first connecting end of the grounding structure; the connecting piece can be made of wear-resistant material to reduce the damage to the connecting piece caused by the relative movement between the connecting piece and the pressure ring; The first mounting hole is opened at the first end, and the number of the first mounting holes is two, the two first mounting holes are arranged at intervals along the first direction, and the line connecting the first end and the second end extends along the second direction; the first direction and the second direction form an angle α, 0°<α≤90°; The grounding structure further includes a second mounting screw, the second mounting screw being used to cooperate with the connecting member and the connecting wire at the same time, so that the connecting member is connected to the connecting wire; The wheel center is provided with a groove for accommodating the second mounting screw to prevent the second mounting screw from interfering with the wheel center.

2. The grounding structure according to claim 1, characterized in that: The connecting member is rotatably connected to the connecting wire.

3. The grounding structure according to claim 1, characterized in that: The connecting wire extends along the circumference of the wheel center.

4. The grounding structure according to claim 1, characterized in that: The grounding structure comprises a cable, a first cable terminal and a second cable terminal, wherein the first cable terminal and the second cable terminal are respectively fixed at two ends of the cable; the first cable terminal is used for conductive connection with the wheel core; The second cable terminal is used for conductive connection with the wheel hoop.

5. The grounding structure according to claim 4, characterized in that: The first mounting hole is opened in the second cable terminal.

6. The grounding structure according to claim 4, characterized in that: The cable includes a copper core and a heat shrink tube sleeved on the copper core, the first cable terminal and the second cable terminal are respectively clamped at two ends of the copper core, and the two ends of the heat shrink tube are respectively sleeved on the first cable terminal and the second cable terminal.

7. The grounding structure according to claim 4, characterized in that: The grounding structure further includes a gasket, which is used to be arranged between the first cable terminal and the wheel center, and has an accommodating groove for accommodating the first cable terminal.

8. An elastic wheel, characterized in that: The elastic wheel comprises the ground contact structure according to any one of claims 1-7.

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