PTFE conductive grounding ring
By designing a PTFE conductive grounding ring, combined with a plastic support and conductive material, the problem of insufficient strength of PTFE material is solved, achieving a lightweight grounding effect that is low-cost, easy to install and replace, and reducing friction loss.
Patent Information
- Application Number
- CN202423205749.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-25
AI Technical Summary
The existing PTFE material has insufficient strength, resulting in high cost of grounding elements, complex installation, and difficulty in achieving lightweight design. Furthermore, the traditional installation process of grounding elements is complex and cannot meet the requirements for lightweight design.
The PTFE conductive grounding ring consists of a PTFE ring-shaped body and PTFE protrusions, combined with the annular upper and lower shells of the plastic support body. It is fixed by circumferential grooves and flanges. The surface is sprayed with conductive material to ensure conductivity. The plastic support body has a certain strength and elastic deformation capability.
It reduces costs, simplifies the installation process, achieves lightweight design, extends service life, facilitates the replacement of PTFE conductive components, and reduces frictional wear on the plastic support.
Smart Images
Figure CN223599042U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of grounding element technical field, especially a kind of PTFE conductive grounding ring. BACKGROUND
[0002] At present, the harm of shaft current is generally solved from two aspects, one is to optimize from the inverter and motor design, such as equal potential lap joint, zero point grounding, three-phase cable shielding, Faraday shielding or adding filter, electric element such as electric reactor, which often increases the complexity of design and the cost of additional electrical components; the second direction is to add a physical insulation or conductive structure, such as insulated bearing, ceramic ball bearing, conductive carbon brush and grounding element, which can simplify the complex design of the source end and ensure that the current at the terminal can be effectively blocked or led out to the vehicle body, similar to the function of the ground wire.
[0003] The grounding element is one of the emerging conductive technologies in recent years, and the current flows through the motor stator, the rotor or the drive end bearing, and finally flows to the vehicle body. The grounding element on the market, such as PTFE plated silver, conductive non-woven fabric and conductive carbon brush, directly contacts the bearing and leads the current out of the body to the grounding shell. The essence is still to change the original insulation property of the wear-resistant material, but the strength of PTFE material is not enough, and it needs to be thickened or fixed with a metal boundary, which increases the cost, the installation process is complex, and it is not conducive to the requirement of lightweight. The utility model provides a conductive ring integrated with conductive PTFE and lightweight, easy to install and replace. SUMMARY
[0004] The utility model aims at overcoming the defects of the prior art and provides a PTFE conductive grounding ring integrated with conductive PTFE, lightweight, easy to install and replace.
[0005] The purpose of the utility model can be achieved by the following technical solutions:
[0006] A PTFE conductive grounding ring, comprising:
[0007] The PTFE conductive grounding element comprises a PTFE ring body and a plurality of PTFE protrusions located around and connected to the PTFE ring body.
[0008] The plastic support body comprises an annular upper shell and an annular lower shell placed above and below the PTFE conductive grounding element respectively, the annular lower shell comprises an annular base for placing the PTFE ring body, a plurality of connecting blocks arranged at the edge of the annular base, and grooves located between the connecting blocks for placing the PTFE protrusions.
[0009] Further, the annular base comprises a first area in contact with the connecting block and a second area for placing the PTFE annular body.
[0010] Further, the radial width of the second area is 2-8mm less than the radial width of the PTFE annular body.
[0011] Further, the radial width of the second area is 2-8mm less than the radial width of the PTFE annular body.
[0012] Further, the radial width of the annular upper shell is less than the radial width of the PTFE annular body, so that the PTFE annular body exceeds the area where the annular upper shell is located inwardly.
[0013] Further, the radial width of the annular upper shell is 2-8mm less than the radial width of the PTFE annular body.
[0014] Further, the radial width of the groove is less than the radial width of the PTFE protrusion, so that the PTFE protrusion exceeds the groove outwardly.
[0015] Further, the radial width of the groove is 2-8mm less than the radial width of the PTFE protrusion.
[0016] Further, the inner wall of the connecting block is provided with a circumferential clamping groove, and the outer side wall of the annular upper shell is provided with a circumferential flange which is adapted to the circumferential clamping groove and is clamped with the circumferential clamping groove.
[0017] Further, the depth of the circumferential clamping groove is 0.5-2mm, and the radial width of the circumferential flange is consistent with the depth of the circumferential clamping groove.
[0018] Further, the surface of the PTFE conductive grounding element is sprayed or coated with a conductive substance, so that the surface is conductive, and the conductive substance comprises carbon black, graphite, metal powder and conductive polymer.
[0019] Further, the plastic support body has a certain strength, a certain elastic deformation capacity and recovery capacity, and the material of the plastic support body comprises polycarbonate, polyamide and polyacrylonitrile-butadiene-styrene.
[0020] Compared with the prior art, the utility model has the following advantages:
[0021] (1) The utility model discloses a plastic support body is set up to surround the PTFE conductive grounding element, makes it be placed between annular upper casing and annular lower casing, makes the plastic support body gives the PTFE conductive grounding element support, strengthens the intensity of reinforcing device. Compared with the thickening or the PTFE of fixed PTFE with the aid of metal boundary in conventional method, its cost is more low, installation is simpler, and the requirement of light weight is satisfied simultaneously.
[0022] (2) The annular upper casing and annular lower casing in the utility model can be reused, when the PTFE conductive grounding element is damaged or cannot be used, only need to replace the PTFE conductive grounding element, thereby greatly reduce the use cost.
[0023] (3) The utility model discloses a PTFE conductive grounding element is set up into the form of PTFE annular body and PTFE boss, and sets up the annular lower casing with the recess of matched, can make PTFE boss be placed in recess, not only the PTFE conductive grounding element is fixed better, and connects firmly, and can provide stress point from recess, separates annular upper casing from annular lower casing, thereby makes the process of dismounting more convenient to replace PTFE conductive grounding element.
[0024] (4) The radial width of the second area of the annular base in the utility model is less than the radial width of the PTFE annular body, so that the PTFE annular body exceeds the second area inwardly, the radial width of the annular upper casing is less than the radial width of the PTFE annular body, so that the PTFE annular body exceeds the annular upper casing inwardly, and the radial width of the recess is less than the radial width of the PTFE boss, so that the PTFE boss exceeds the recess outwardly. The above setting makes the inner wall of the PTFE annular body of the PTFE conductive grounding element have a separate contact bearing area, and the outer wall of the PTFE boss of the PTFE conductive grounding element has a separate contact bearing area, so that the plastic support body does not contact the bearing, which is conducive to reducing the friction loss of the plastic support body while realizing the conductive function, thereby increasing the service life. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 It is the explosion schematic view of the PTFE conductive grounding ring shown in embodiment 1.
[0026] Mark explanation in the drawing:
[0027] 1-PTFE conductive grounding element, 11-PTFE annular body, 12-PTFE boss;
[0028] 2 - plastic support, 21 - annular upper shell, 211 - annular flange, 22 - annular lower shell, 221 - annular base, 222 - connecting block, 2221 - annular clamping groove, 223 - groove. DETAILED DESCRIPTION
[0029] The utility model will be described in detail below in combination with the drawings and specific embodiments. The embodiments are implemented on the premise of the technical scheme of the utility model, and detailed implementation modes and specific operation processes are given, but the protection scope of the utility model is not limited to the following embodiments. In the following embodiments or embodiments, if no special description is given to the function components or structures, it is indicated that they are all conventional components or conventional structures adopted in the field to realize the corresponding functions.
[0030] It should be noted that in the description of the utility model, the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0031] In the description of the utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0032] Embodiment 1
[0033] A PTFE conductive grounding ring, as shown in Figure 1 comprises:
[0034] The PTFE conductive grounding element 1 comprises a PTFE annular body 11 and a plurality of PTFE protrusions 12 located around and connected to the PTFE annular body 11;
[0035] The plastic support body 2 comprises an annular upper shell 21 and an annular lower shell 22 arranged above and below the PTFE conductive grounding element 1 respectively, the annular lower shell 22 comprises an annular base 221 for placing the PTFE annular body 11, a plurality of connecting blocks 222 arranged at the edge of the annular base 221, and grooves 223 arranged between the connecting blocks 222 for placing the PTFE protrusions 12.
[0036] In this embodiment, the annular base 221 comprises a first area in contact with the connecting blocks 222, and a second area for placing the PTFE annular body 11. The radial width of the second area is 5mm less than the radial width of the PTFE annular body 11, so that the PTFE annular body 11 is outwardly pressed against the connecting blocks 222 and inwardly exceeds the second area. That is, the inner diameter of the PTFE annular body 11 is 5mm less than the inner diameter of the annular base 221.
[0037] In this embodiment, the radial width of the annular upper shell 21 is 5mm less than the radial width of the PTFE annular body 11, so that the PTFE annular body 11 inwardly exceeds the area where the annular upper shell 21 is located. That is, the inner diameter of the PTFE annular body 11 is less than the inner diameter of the annular upper shell 21.
[0038] In this embodiment, the radial width of the grooves 223 is 5mm less than the radial width of the PTFE protrusions 12, so that the PTFE annular body 11 is outwardly pressed against the connecting blocks 222 and inwardly exceeds the annular upper shell 21.
[0039] In this embodiment, the inner wall of the connecting block 222 is provided with a ring-shaped clamping groove 2221, and the outer wall of the annular upper shell 21 is provided with a ring-shaped flange 211 which is adapted to the ring-shaped clamping groove 2221 and clamped therewith. The depth of the ring-shaped clamping groove 2221 is 1mm, and the radial width of the ring-shaped flange 211 is consistent with the depth of the ring-shaped clamping groove 2221.
[0040] In this embodiment, the height of the connecting block 222 is consistent with the height of the annular upper shell 21, the ring-shaped clamping groove 2221 is located at the middle height position of the connecting block 222, and the ring-shaped flange 221 is located at the middle height position of the annular upper shell 21, so that the clamping of the annular upper shell 21 and the annular lower shell 22 is more firm and will not shake.
[0041] In this embodiment, the position of the PTFE protrusions 12 on the PTFE annular body 11 corresponds to the position of the grooves 223 on the annular base 221.
[0042] In the embodiment, the surface of the PTFE conductive grounding element 1 is sprayed with conductive material to make the surface conductive, and the conductive material can be carbon black, graphite, metal powder or conductive polymer. This part is a conventional technique in the art, and thus will not be described in detail.
[0043] In the embodiment, the plastic support 2 has certain strength, elastic deformation capacity and recovery capacity, and the material of the plastic support 2 is polycarbonate PC.
[0044] The working principle of the PTFE conductive grounding ring in the embodiment is as follows:
[0045] The PTFE conductive grounding element 1 is placed in the annular lower shell 22, so that the outer edge of the PTFE annular body 11 is in close contact with the inner edge of the connecting block 222, and the PTFE protrusion 12 is aligned with the groove 223, the PTFE annular body 11 is inwardly protruded from the annular base 221 by 5mm, and the PTFE protrusion 12 is outwardly protruded from the groove 223 by 5mm. The annular upper shell 21 is pressed from top to bottom on the PTFE conductive grounding element 1, and during the pressing process, the connecting block 222 is slightly inclined outwardly to generate deformation, so that the annular flange 211 passes through and enters the annular clamping groove 221, and the annular upper shell 21 and the annular lower shell 22 are connected through the annular flange 211 and the annular clamping groove 221, so that the PTFE conductive grounding element 1 is completely fixed between the annular upper shell 21 and the annular lower shell 22. Since the surface of the PTFE conductive grounding element 1 is sprayed with conductive material, it has conductivity itself, and the inner wall of the PTFE annular body 11 of the PTFE conductive grounding element 1 contacts the bearing to conduct electricity, and the outer wall of the PTFE protrusion 12 of the PTFE conductive grounding element 1 contacts the bearing to conduct electricity. If the PTFE conductive grounding element 1 is worn out after a long time, the annular upper shell 11 is removed from the groove 223, so that the annular upper shell 21 and the annular lower shell 22 are easily separated, and then the PTFE conductive grounding element 1 can be quickly removed and replaced.
[0046] Although the utility model has been described in detail above with general description, specific embodiments and tests, some modifications or improvements can be made on the basis of the utility model, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the utility model, all belong to the scope of protection required by the utility model.
Claims
1. A PTFE electrically conductive grounding ring characterized in that, The utility model relates to a plastic support body (2) and a PTFE conductive grounding element (1) which are connected together. The PTFE conductive grounding element (1) comprises a PTFE annular body (11) and a plurality of PTFE protrusions (12) located around the PTFE annular body (11) and connected to the PTFE annular body (11). The plastic support body (2) comprises an annular upper shell (21) and an annular lower shell (22) which are respectively arranged above and below the PTFE conductive grounding element (1).
2. A PTFE conductive grounding ring according to claim 1, wherein, The annular lower shell (22) comprises an annular base (221) for placing the PTFE annular body (11), a plurality of connecting blocks (222) arranged at the edges of the annular base (221), and a plurality of grooves (223) located between the connecting blocks (222) and used for placing the PTFE protrusions (12).
3. A PTFE conductive grounding ring according to claim 2, wherein, The annular base (221) comprises a first area in contact with the connecting blocks (222) and a second area for placing the PTFE annular body (11).
4. A PTFE conductive grounding ring according to claim 3, wherein, The radial width of the second area is smaller than the radial width of the PTFE annular body (11), so that the PTFE annular body (11) is outwardly pressed against the connecting blocks (222) and inwardly exceeds the second area.
5. The PTFE conductive grounding ring of claim 1, wherein, The radial width of the second area is smaller than the radial width of the PTFE annular body (11) by 2-8 mm.
6. A PTFE electrically conductive grounding ring according to claim 5, wherein, The radial width of the annular upper shell (21) is smaller than the radial width of the PTFE annular body (11), so that the PTFE annular body (11) inwardly exceeds the area where the annular upper shell (21) is located.
7. A PTFE conductive grounding ring as defined in claim 1, wherein, The radial width of the annular upper shell (21) is smaller than the radial width of the PTFE annular body (11) by 2-8 mm.
8. A PTFE electrically conductive grounding ring according to claim 7, wherein, The radial width of the grooves (223) is smaller than the radial width of the PTFE protrusions (12), so that the PTFE protrusions (12) outwardly exceed the grooves (223).
9. The PTFE conductive grounding ring of claim 1, wherein, The radial width of the grooves (223) is smaller than the radial width of the PTFE protrusions (12) by 2-8 mm.
10. A PTFE conductive grounding ring according to claim 9, wherein, The inner wall of the connecting blocks (222) is provided with a circumferential clamping groove (2221), and the outer side wall of the annular upper shell (21) is provided with a circumferential flange (211) which is adapted to the circumferential clamping groove (2221) and is clamped with the circumferential clamping groove (2221). The depth of the circumferential clamping groove (2221) is 0.5-2 mm, and the radial width of the circumferential flange (211) is consistent with the depth of the circumferential clamping groove (2221).