Thick-film non-inductive high-voltage divider resistor

Abstract

The utility model relates to the technical field of resistors, and provides a thick-film non-inductive high-voltage divider resistor which comprises an aluminum oxide ceramic rod and an external assembly, and electrodes are sintered at the two ends of the outer surface of the aluminum oxide ceramic rod; the external assembly comprises a sleeve, a threaded piece and a lead; the sleeve is arranged on the aluminum oxide ceramic rod in a sleeving mode, a first screw hole is formed in the sleeve, and the first screw hole extends in the radial direction of the sleeve; the threaded piece is in threaded connection with the sleeve through the first screw hole, the end of the threaded piece is used for abutting against the electrode, and the threaded piece is made of a conductive material; and the end part of the lead and the threaded piece are integrally formed. The motor has the effect of reducing the risk that the lead falls off from the motor.

Description

Technical Field

[0001] The present application relates to the field of resistance technology, and in particular, to a thick film non-inductive high voltage dividing resistor. Background Art

[0002] A thick film non-inductive high voltage resistor is a resistor, which is characterized by a relatively large resistance value and a small change performance within a certain working range. The thick film non-inductive high voltage resistor is mainly made of thin film materials, which can be metals, alloys or conductive ceramics.

[0003] There is a conventional leaded thick film non-inductive high voltage dividing resistor, which includes an alumina ceramic rod and two nickel-plated copper caps. The two nickel-plated copper caps are respectively installed at both ends of the alumina ceramic rod. Electrodes are sintered at both ends of the alumina ceramic rod, and a lead is welded to one of the electrodes. During the actual use of the resistor, the distance of the lead can be adjusted according to actual needs to improve the flexibility of use of the thick film non-inductive high voltage dividing resistor.

[0004] However, since the diameter of the lead is small and the connection area with the electrode is small, the risk of the lead falling off from the electrode is relatively large. Utility Model Content

[0005] In order to reduce the risk of the lead falling off from the electrode, the present application provides a thick film non-inductive high voltage dividing resistor.

[0006] The thick film non-inductive high voltage dividing resistor provided by the present application adopts the following technical solutions:

[0007] A thick film non-inductive high voltage dividing resistor includes an alumina ceramic rod and an external component. Electrodes are sintered at both ends of the outer surface of the alumina ceramic rod. The external component includes a sleeve, a threaded member and a lead. The sleeve is sleeved on the alumina ceramic rod. The sleeve is provided with a first screw hole, and the first screw hole extends along the radial direction of the sleeve. The threaded member is threadedly connected to the sleeve through the first screw hole. The end of the threaded member is used to abut against the electrode, and the threaded member is made of a conductive material. The end of the lead is integrally formed with the threaded member.

[0008] By adopting the above technical solutions, when connecting the lead, first sleeve the sleeve on the alumina ceramic rod, then thread the threaded member embedded with the lead into the first screw hole, and make the end of the threaded member tightly abut against the electrode, so as to realize the electrical connection between the lead and the electrode. By installing the lead using the above structure, since the lead is embedded in the conductive threaded member and the threaded member is stably connected to the sleeve through the first screw hole, compared with the method of welding the lead to the electrode, the connection stability of the lead is effectively improved, and the risk of the lead falling off from the electrode is reduced.

[0009] Optionally, a rubber pad is provided on the inner wall of the sleeve for the alumina ceramic rod to abut against.

[0010] By adopting the above technical solution, the friction between the sleeve and the alumina ceramic rod is increased, and the connection stability of the sleeve on the alumina ceramic rod is improved.

[0011] Optionally, a conductive sheet is provided on the inner wall of the sleeve. The conductive sheet is arranged around the central axis of the sleeve and is used for abutting against the electrode.

[0012] By adopting the above technical solution, since there is a large contact area between the conductive sheet and the electrode and the end of the threaded part necessarily abuts against the conductive sheet, the stability of the electrical connection between the lead wire and the electrode can be ensured.

[0013] Optionally, the sleeve includes a plurality of abutting members which are arranged circumferentially along the alumina ceramic rod; the adjacent abutting members are detachably connected, and the first screw hole is arranged in one of the abutting members.

[0014] By adopting the above technical solution, when installing the sleeve, the abutting members are sequentially abutted against the positions where the alumina ceramic rod connects the electrode, and the plurality of abutting members are sequentially connected, so that there is no need to move the sleeve along the length direction of the alumina ceramic rod, reducing the abrasion between the alumina ceramic rod and the motor and facilitating the connection of the sleeve.

[0015] Optionally, the abutting member is arc-shaped, and both ends of the abutting member are connected with connecting ears. The connecting ears are provided with second screw holes, and bolts are connected to the connecting ears through the second screw holes; the connecting ears of the adjacent abutting members abut against each other, and the second screw holes of the two mutually abutting connecting ears are mutually communicated and coaxially arranged.

[0016] By adopting the above technical solution, when installing the sleeve, the two adjacent abutting members are abutted against each other, and the bolts are screwed into the two mutually communicated second screw holes to realize the detachable connection between the adjacent abutting members. The structure is simple and the operation is convenient.

[0017] Optionally, an airbag is connected to the inner wall of the sleeve for abutting against the alumina ceramic rod.

[0018] By adopting the above technical solution, when installing the sleeve, first release the gas in the airbag, then sleeved the sleeve on the alumina ceramic rod, and then inflate the airbag until the airbag tightly abuts against the alumina ceramic rod, so that there is no need to friction the sleeve against the alumina ceramic rod when installing the sleeve, reducing the wear between the sleeve and the alumina ceramic rod and improving the installation stability of the sleeve on the alumina ceramic rod at the same time.

[0019] Optionally, two limiting plates are arranged on the inner wall of the sleeve, and the limiting plates are arranged around the central axis of the sleeve; an installation groove is defined between the two limiting plates and the inner wall of the sleeve, and the airbag is located in the installation groove.

[0020] By adopting the above technical solution, the airbag is protected by the two limiting plates, and the service life of the airbag is prolonged.

[0021] Optionally, a plurality of rolling balls are connected to the side of the limiting plate close to the alumina ceramic rod in a rolling manner, and the plurality of rolling balls are arranged at intervals around the alumina ceramic rod.

[0022] By adopting the above technical solution, the smoothness of sleeving the sleeve on the alumina ceramic rod is improved.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. By installing an external component on the alumina ceramic rod, embedding the lead wire into the threaded part, and threadedly connecting the threaded part to the sleeve, the stability of the electrical connection between the lead wire and the electrode is improved;

[0025] 2. The sleeve includes a plurality of abutting members, the plurality of abutting members are arranged along the circumferential direction of the alumina ceramic rod, and the adjacent abutting members are detachably connected, which improves the installation convenience of the sleeve;

[0026] 3. By arranging an airbag on the inner wall of the sleeve, on the one hand, the installation convenience of the sleeve is improved, and on the other hand, the installation stability of the sleeve is improved. Description of the Drawings

[0027] Figure 1 is a schematic structural diagram of Embodiment 1 of the present application.

[0028] Figure 2 is a schematic structural diagram for showing the alumina ceramic rod in Embodiment 1.

[0029] Figure 3 is a schematic structural diagram of Embodiment 2 of the present application.

[0030] Figure 4 is a schematic structural diagram of Embodiment 3 of the present application.

[0031] Figure 5 is a schematic structural diagram for showing the sleeve in Embodiment 3.

[0032] Figure 6 is Figure 5 an enlarged schematic view of part A.

[0033] Description of reference numerals: 1. Alumina ceramic rod; 11. Electrode; 12. Resistance paste layer; 2. Nickel-plated copper cap; 3. External component; 31. Sleeve; 311. First screw hole; 32. Threaded part; 33. Lead wire; 34. Contact part; 341. Connection ear; 342. Second screw hole; 343. Bolt; 35. Conductive sheet; 36. Rubber pad; 37. Airbag; 38. Limiting plate; 381. Ball. Detailed implementation mode

[0034] The following further elaborates on this application in conjunction with the attached Figures 1-6 drawings.

[0035] The embodiment of this application discloses a thick-film non-inductive high-voltage voltage-dividing resistor.

[0036] Embodiment 1

[0037] Referring to Figure 1 and Figure 2 , a thick-film non-inductive high-voltage voltage-dividing resistor includes an alumina ceramic rod 1, nickel-plated copper caps 2, and an external component 3.

[0038] Electrodes 11 are sintered at both ends of the alumina ceramic rod 1, and the electrodes 11 are arranged around the circumference of the alumina ceramic rod 1. A resistance paste layer 12 is sintered on the circumferential side of the alumina ceramic rod 1, and the resistance paste layer 12 is arranged around the circumference of the alumina ceramic rod 1. Both ends of the resistance paste layer 12 extend to the positions of the two electrodes 11 respectively, thus forming a resistance body. Insulating paint (not shown in the figure) is applied on the surface of the resistance body.

[0039] There are two nickel-plated copper caps 2, and the two nickel-plated copper caps 2 are respectively connected to both ends of the alumina ceramic rod 1. Both of the two nickel-plated copper caps 2 are provided with mounting screw holes for fixing this resistor.

[0040] The external component 3 includes a sleeve 31, a threaded part 32, and a lead wire 33. The sleeve 31 is sleeved on the alumina ceramic rod 1, and the sleeve 31 is provided with a first screw hole 311 which extends along the radial direction of the sleeve 31. The threaded part 32 is threadedly connected to the sleeve 31 through the first screw hole 311, and the end of the threaded part 32 is used to abut against the electrode 11. The threaded part 32 is made of a conductive material. The end of the lead wire 33 is embedded in the threaded part 32 and is integrally formed with the threaded part 32.

[0041] The implementation principle of Embodiment 1 is as follows: When connecting the lead wire 33, first sleeved the sleeve 31 on the alumina ceramic rod 1, then threadedly connect the threaded member 32 embedded with the lead wire 33 into the first screw hole 311, and make the end of the threaded member 32 tightly abut against the electrode 11, so as to realize the electrical connection between the lead wire 33 and the electrode 11. When installing the lead wire 33 using the above structure, since the lead wire 33 is embedded in the conductive threaded member 32, and the threaded member 32 is stably connected to the sleeve 31 through the first screw hole 311, compared with the method of welding the lead wire 33 to the electrode 11, the connection stability of the lead wire 33 is effectively improved, and the risk of the lead wire 33 falling off from the electrode 11 is reduced.

[0042] Embodiment 2

[0043] Referring to Figure 3 , the difference between this embodiment and Embodiment 1 is that the sleeve 31 includes a plurality of abutting members 34, and the plurality of abutting members 34 are arranged along the circumferential direction of the alumina ceramic rod 1, and the adjacent abutting members 34 are detachably connected. When installing the sleeve 31, the abutting members 34 are sequentially abutted against the positions of the alumina ceramic rod 1 connecting the electrode 11, and the plurality of abutting members 34 are sequentially connected, so that it is not necessary to move the sleeve 31 along the length direction of the alumina ceramic rod 1, reducing the rubbing between the alumina ceramic rod 1 and the motor, and also facilitating the connection of the sleeve 31.

[0044] In this embodiment, two abutting members 34 are provided to ensure the installation convenience of the sleeve 31.

[0045] Specifically, the abutting member 34 is arc-shaped, both ends of the abutting member 34 are connected with connecting ears 341, the connecting ears 341 are provided with second screw holes 342, and the connecting ears 341 are threadedly connected with bolts 343 through the second screw holes 342. The connecting ears 341 of the adjacent abutting members 34 abut against each other, and the second screw holes 342 of the two abutting connecting ears 341 communicate with each other and are coaxially arranged. When installing the sleeve 31, the two adjacent abutting members 34 are abutted against each other, and the bolts 343 are screwed into the two mutually communicating second screw holes 342. To strengthen the connection stability, nuts can be connected to the bolts 343.

[0046] Furthermore, a conductive sheet 35 is provided on the inner wall of the sleeve 31. In this embodiment, the conductive sheet 35 is provided on the abutting member 34 provided with the first screw hole 311. One side of the conductive sheet 35 is used to abut against the electrode 11, and the other side is used for the end of the threaded member 32 to abut against. Since there is a large contact area between the conductive sheet 35 and the electrode 11 and the end of the threaded member 32 must abut against the conductive sheet 35, the stability of the electrical connection between the lead wire 33 and the electrode 11 can be ensured.

[0047] Further, a rubber pad 36 is provided on the inner wall of the sleeve 31. The rubber pad 36 is used to abut against the alumina ceramic rod 1, and the rubber pad 36 is integrally formed with the sleeve 31. In this embodiment, the rubber pad 36 is provided on the other abutting member 34 where the first screw hole 311 is not opened, so as to increase the friction between the sleeve 31 and the alumina ceramic rod 1 and improve the connection stability of the sleeve 31 on the alumina ceramic rod 1.

[0048] Embodiment 3

[0049] Referring to Figure 4 and Figure 5 , the difference between this embodiment and Embodiment 1 is that an airbag 37 is connected to the inner wall of the sleeve 31. The airbag 37 extends circumferentially along the alumina ceramic rod 1, and there is a gap between the two ends of the airbag 37 for the threaded member 32 to pass through. When installing the sleeve 31, first release the gas in the airbag 37, then sleeved the sleeve 31 on the alumina ceramic rod 1, and then inflate the airbag 37 until the airbag 37 tightly abuts against the alumina ceramic rod 1. Thus, when installing the sleeve 31, there is no need to friction the sleeve 31 against the alumina ceramic rod 1, reducing the wear between the sleeve 31 and the alumina ceramic rod 1, and at the same time improving the installation stability of the sleeve 31 on the alumina ceramic rod 1.

[0050] Referring to Figure 4 and Figure 6 , in this embodiment, two limiting plates 38 are also fixedly connected to the inner wall of the sleeve 31. Both of the two limiting plates 38 are arranged around the central axis of the sleeve 31. An installation groove is defined between the two limiting plates 38 and the inner wall of the sleeve 31, and the airbag 37 is located in the installation groove, so as to protect the airbag by the two limiting plates 38 and extend the service life of the airbag 37.

[0051] Further, a plurality of rolling balls 381 are rotatably connected to the side of the limiting plate 38 close to the alumina ceramic rod 1. The plurality of rolling balls 381 are arranged at intervals around the alumina ceramic rod 1 to improve the smoothness of sleeving the sleeve 31 on the alumina ceramic rod 1.

[0052] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A thick film non-inductive high voltage divider resistor, characterized in that: The invention comprises an alumina ceramic rod (1) and an external component (3), wherein electrodes (11) are sintered at both ends of the outer surface of the alumina ceramic rod (1); the external component (3) comprises a sleeve (31), a threaded member (32) and a lead wire (33); the sleeve (31) is sleeved on the alumina ceramic rod (1), the sleeve (31) is provided with a first screw hole (311), and the first screw hole (311) is extended along the radial direction of the sleeve (31); the threaded member (32) is threadedly connected to the sleeve (31) through the first screw hole (311), the end of the threaded member (32) is used to abut against the electrode (11), and the threaded member (32) is made of conductive material; the end of the lead wire (33) is integrally formed with the threaded member (32).

2. The thick film non-inductive high voltage divider resistor according to claim 1, characterized in that: The inner wall of the sleeve (31) is provided with a rubber pad (36), and the rubber pad (36) is used for the alumina ceramic rod (1) to abut against.

3. The thick film non-inductive high voltage divider resistor according to claim 1, characterized in that: The inner wall of the sleeve (31) is provided with a conductive sheet (35), the conductive sheet (35) is arranged around the central axis of the sleeve (31), and the conductive sheet (35) is used to abut against the electrode (11).

4. A thick film non-inductive high voltage divider resistor according to any one of claims 1 to 3, characterized in that: The sleeve (31) comprises a plurality of abutment members (34), and the plurality of abutment members (34) are arranged along the circumference of the alumina ceramic rod (1); adjacent abutment members (34) are detachably connected, and the first screw hole (311) is provided in one of the abutment members (34).

5. The thick film non-inductive high voltage divider resistor according to claim 4, characterized in that: The abutting piece (34) is arranged in an arc shape, and both ends of the abutting piece (34) are connected to connecting ears (341), and the connecting ears (341) are provided with second screw holes (342), and the connecting ears (341) are threadedly connected to bolts (343) through the second screw holes (342); the connecting ears (341) of adjacent abutting pieces (34) abut against each other, and the second screw holes (342) of the two connecting ears (341) abutting against each other are connected to each other and are coaxially arranged.

6. The thick film non-inductive high voltage divider resistor according to claim 1, characterized in that: An air bag (37) is connected to the inner wall of the sleeve (31), and the air bag (37) is used to abut against the alumina ceramic rod (1).

7. The thick film non-inductive high voltage divider resistor according to claim 6, characterized in that: The inner wall of the sleeve (31) is provided with two limit plates (38), and the limit plates (38) are arranged around the central axis of the sleeve (31); the two limit plates (38) and the inner wall of the sleeve (31) define a mounting groove, and the airbag (37) is located in the mounting groove.

8. The thick film non-inductive high voltage divider resistor according to claim 7, characterized in that: A plurality of balls (381) are rollingly connected to one side of the limiting plate (38) close to the alumina ceramic rod (1), and the plurality of balls (381) are arranged at intervals around the alumina ceramic rod (1).

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